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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 | } |
03a4e1f6 | 1090 | free_svc_cred(&clp->cl_cred); |
1da177e4 LT |
1091 | kfree(clp->cl_name.data); |
1092 | kfree(clp); | |
1093 | } | |
1094 | ||
d7682988 BH |
1095 | void |
1096 | release_session_client(struct nfsd4_session *session) | |
1097 | { | |
1098 | struct nfs4_client *clp = session->se_client; | |
1099 | ||
1100 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1101 | return; | |
1102 | if (is_client_expired(clp)) { | |
1103 | free_client(clp); | |
1104 | session->se_client = NULL; | |
1105 | } else | |
1106 | renew_client_locked(clp); | |
1107 | spin_unlock(&client_lock); | |
d7682988 BH |
1108 | } |
1109 | ||
84d38ac9 BH |
1110 | /* must be called under the client_lock */ |
1111 | static inline void | |
1112 | unhash_client_locked(struct nfs4_client *clp) | |
1113 | { | |
792c95dd BF |
1114 | struct nfsd4_session *ses; |
1115 | ||
07cd4909 | 1116 | mark_client_expired(clp); |
84d38ac9 | 1117 | list_del(&clp->cl_lru); |
4c649378 | 1118 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1119 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1120 | list_del_init(&ses->se_hash); | |
4c649378 | 1121 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1122 | } |
1123 | ||
1da177e4 LT |
1124 | static void |
1125 | expire_client(struct nfs4_client *clp) | |
1126 | { | |
fe0750e5 | 1127 | struct nfs4_openowner *oo; |
1da177e4 | 1128 | struct nfs4_delegation *dp; |
1da177e4 LT |
1129 | struct list_head reaplist; |
1130 | ||
1da177e4 LT |
1131 | INIT_LIST_HEAD(&reaplist); |
1132 | spin_lock(&recall_lock); | |
ea1da636 N |
1133 | while (!list_empty(&clp->cl_delegations)) { |
1134 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1135 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1136 | list_move(&dp->dl_recall_lru, &reaplist); |
1137 | } | |
1138 | spin_unlock(&recall_lock); | |
1139 | while (!list_empty(&reaplist)) { | |
1140 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1141 | unhash_delegation(dp); |
1142 | } | |
ea1da636 | 1143 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1144 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1145 | release_openowner(oo); | |
1da177e4 | 1146 | } |
6ff8da08 | 1147 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1148 | if (clp->cl_cb_conn.cb_xprt) |
1149 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1150 | list_del(&clp->cl_idhash); |
1151 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1152 | spin_lock(&client_lock); |
84d38ac9 | 1153 | unhash_client_locked(clp); |
46583e25 BH |
1154 | if (atomic_read(&clp->cl_refcount) == 0) |
1155 | free_client(clp); | |
be1fdf6c | 1156 | spin_unlock(&client_lock); |
1da177e4 LT |
1157 | } |
1158 | ||
35bba9a3 BF |
1159 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1160 | { | |
1161 | memcpy(target->cl_verifier.data, source->data, | |
1162 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1163 | } |
1164 | ||
35bba9a3 BF |
1165 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1166 | { | |
1da177e4 LT |
1167 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1168 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1169 | } | |
1170 | ||
03a4e1f6 | 1171 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1172 | { |
03a4e1f6 BF |
1173 | if (source->cr_principal) { |
1174 | target->cr_principal = | |
1175 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1176 | if (target->cr_principal == NULL) | |
1177 | return -ENOMEM; | |
1178 | } else | |
1179 | target->cr_principal = NULL; | |
1da177e4 LT |
1180 | target->cr_uid = source->cr_uid; |
1181 | target->cr_gid = source->cr_gid; | |
1182 | target->cr_group_info = source->cr_group_info; | |
1183 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1184 | return 0; |
1da177e4 LT |
1185 | } |
1186 | ||
35bba9a3 | 1187 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1188 | { |
a55370a3 | 1189 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1190 | } |
1191 | ||
1192 | static int | |
599e0a22 BF |
1193 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1194 | { | |
1195 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1196 | } |
1197 | ||
1198 | static int | |
599e0a22 BF |
1199 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1200 | { | |
1201 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1202 | } |
1203 | ||
8fbba96e BF |
1204 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1205 | { | |
1206 | int i; | |
1207 | ||
1208 | if (g1->ngroups != g2->ngroups) | |
1209 | return false; | |
1210 | for (i=0; i<g1->ngroups; i++) | |
1211 | if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) | |
1212 | return false; | |
1213 | return true; | |
1214 | } | |
1215 | ||
1da177e4 LT |
1216 | /* XXX what about NGROUP */ |
1217 | static int | |
599e0a22 BF |
1218 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1219 | { | |
8fbba96e BF |
1220 | if ((cr1->cr_uid != cr2->cr_uid) |
1221 | || (cr1->cr_gid != cr2->cr_gid) | |
1222 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) | |
1223 | return false; | |
1224 | if (cr1->cr_principal == cr2->cr_principal) | |
1225 | return true; | |
1226 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1227 | return false; | |
1228 | return 0 == strcmp(cr1->cr_principal, cr1->cr_principal); | |
1da177e4 LT |
1229 | } |
1230 | ||
5ec7b46c BF |
1231 | static void gen_clid(struct nfs4_client *clp) |
1232 | { | |
1233 | static u32 current_clientid = 1; | |
1234 | ||
1da177e4 LT |
1235 | clp->cl_clientid.cl_boot = boot_time; |
1236 | clp->cl_clientid.cl_id = current_clientid++; | |
1237 | } | |
1238 | ||
deda2faa BF |
1239 | static void gen_confirm(struct nfs4_client *clp) |
1240 | { | |
ab4684d1 | 1241 | __be32 verf[2]; |
deda2faa | 1242 | static u32 i; |
1da177e4 | 1243 | |
ab4684d1 CL |
1244 | verf[0] = (__be32)get_seconds(); |
1245 | verf[1] = (__be32)i++; | |
1246 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1247 | } |
1248 | ||
38c2f4b1 | 1249 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1250 | { |
38c2f4b1 | 1251 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1252 | } |
1253 | ||
38c2f4b1 | 1254 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1255 | { |
1256 | struct nfs4_stid *s; | |
4d71ab87 | 1257 | |
38c2f4b1 | 1258 | s = find_stateid(cl, t); |
4d71ab87 BF |
1259 | if (!s) |
1260 | return NULL; | |
f459e453 | 1261 | if (typemask & s->sc_type) |
4581d140 | 1262 | return s; |
4581d140 BF |
1263 | return NULL; |
1264 | } | |
1265 | ||
b09333c4 RL |
1266 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1267 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1268 | { | |
1269 | struct nfs4_client *clp; | |
1270 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1271 | int ret; |
b09333c4 RL |
1272 | |
1273 | clp = alloc_client(name); | |
1274 | if (clp == NULL) | |
1275 | return NULL; | |
1276 | ||
792c95dd | 1277 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1278 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1279 | if (ret) { | |
1280 | spin_lock(&client_lock); | |
1281 | free_client(clp); | |
1282 | spin_unlock(&client_lock); | |
1283 | return NULL; | |
b09333c4 | 1284 | } |
38c2f4b1 | 1285 | idr_init(&clp->cl_stateids); |
b09333c4 | 1286 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1287 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1288 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1289 | INIT_LIST_HEAD(&clp->cl_idhash); |
1290 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1291 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1292 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1293 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1294 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1295 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1296 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1297 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1298 | clear_bit(0, &clp->cl_cb_slot_busy); |
1299 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1300 | copy_verf(clp, verf); | |
1301 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1302 | clp->cl_flavor = rqstp->rq_flavor; | |
b09333c4 | 1303 | gen_confirm(clp); |
edd76786 | 1304 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1305 | return clp; |
1306 | } | |
1307 | ||
fd39ca9a | 1308 | static void |
1da177e4 LT |
1309 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1310 | { | |
1311 | unsigned int idhashval; | |
1312 | ||
1313 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1314 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1315 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1316 | renew_client(clp); |
1da177e4 LT |
1317 | } |
1318 | ||
fd39ca9a | 1319 | static void |
1da177e4 LT |
1320 | move_to_confirmed(struct nfs4_client *clp) |
1321 | { | |
1322 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1323 | unsigned int strhashval; | |
1324 | ||
1325 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1326 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1327 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1328 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1329 | renew_client(clp); |
1330 | } | |
1331 | ||
1332 | static struct nfs4_client * | |
1333 | find_confirmed_client(clientid_t *clid) | |
1334 | { | |
1335 | struct nfs4_client *clp; | |
1336 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1337 | ||
1338 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 BF |
1339 | if (same_clid(&clp->cl_clientid, clid)) { |
1340 | renew_client(clp); | |
1da177e4 | 1341 | return clp; |
a50d2ad1 | 1342 | } |
1da177e4 LT |
1343 | } |
1344 | return NULL; | |
1345 | } | |
1346 | ||
1347 | static struct nfs4_client * | |
1348 | find_unconfirmed_client(clientid_t *clid) | |
1349 | { | |
1350 | struct nfs4_client *clp; | |
1351 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1352 | ||
1353 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1354 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1355 | return clp; |
1356 | } | |
1357 | return NULL; | |
1358 | } | |
1359 | ||
6e5f15c9 | 1360 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1361 | { |
6e5f15c9 | 1362 | return clp->cl_exchange_flags != 0; |
e203d506 | 1363 | } |
a1bcecd2 | 1364 | |
28ce6054 | 1365 | static struct nfs4_client * |
e203d506 | 1366 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1367 | { |
1368 | struct nfs4_client *clp; | |
1369 | ||
1370 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1371 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1372 | return clp; |
1373 | } | |
1374 | return NULL; | |
1375 | } | |
1376 | ||
1377 | static struct nfs4_client * | |
e203d506 | 1378 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1379 | { |
1380 | struct nfs4_client *clp; | |
1381 | ||
1382 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1383 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1384 | return clp; |
1385 | } | |
1386 | return NULL; | |
1387 | } | |
1388 | ||
fd39ca9a | 1389 | static void |
6f3d772f | 1390 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1391 | { |
07263f1e | 1392 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1393 | struct sockaddr *sa = svc_addr(rqstp); |
1394 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1395 | unsigned short expected_family; |
1396 | ||
1397 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1398 | if (se->se_callback_netid_len == 3 && | |
1399 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1400 | expected_family = AF_INET; | |
1401 | else if (se->se_callback_netid_len == 4 && | |
1402 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1403 | expected_family = AF_INET6; | |
1404 | else | |
1da177e4 LT |
1405 | goto out_err; |
1406 | ||
f2ac4dc9 | 1407 | conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, |
aa9a4ec7 | 1408 | se->se_callback_addr_len, |
07263f1e BF |
1409 | (struct sockaddr *)&conn->cb_addr, |
1410 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1411 | |
07263f1e | 1412 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1413 | goto out_err; |
aa9a4ec7 | 1414 | |
07263f1e BF |
1415 | if (conn->cb_addr.ss_family == AF_INET6) |
1416 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1417 | |
07263f1e BF |
1418 | conn->cb_prog = se->se_callback_prog; |
1419 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1420 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1421 | return; |
1422 | out_err: | |
07263f1e BF |
1423 | conn->cb_addr.ss_family = AF_UNSPEC; |
1424 | conn->cb_addrlen = 0; | |
849823c5 | 1425 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1426 | "will not receive delegations\n", |
1427 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1428 | ||
1da177e4 LT |
1429 | return; |
1430 | } | |
1431 | ||
074fe897 | 1432 | /* |
557ce264 | 1433 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1434 | */ |
074fe897 AA |
1435 | void |
1436 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1437 | { |
557ce264 AA |
1438 | struct nfsd4_slot *slot = resp->cstate.slot; |
1439 | unsigned int base; | |
074fe897 | 1440 | |
557ce264 | 1441 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1442 | |
557ce264 AA |
1443 | slot->sl_opcnt = resp->opcnt; |
1444 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1445 | |
bf5c43c8 | 1446 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1447 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1448 | slot->sl_datalen = 0; |
bf864a31 | 1449 | return; |
074fe897 | 1450 | } |
557ce264 AA |
1451 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1452 | base = (char *)resp->cstate.datap - | |
1453 | (char *)resp->xbuf->head[0].iov_base; | |
1454 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1455 | slot->sl_datalen)) | |
1456 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1457 | return; | |
074fe897 AA |
1458 | } |
1459 | ||
1460 | /* | |
abfabf8c AA |
1461 | * Encode the replay sequence operation from the slot values. |
1462 | * If cachethis is FALSE encode the uncached rep error on the next | |
1463 | * operation which sets resp->p and increments resp->opcnt for | |
1464 | * nfs4svc_encode_compoundres. | |
074fe897 | 1465 | * |
074fe897 | 1466 | */ |
abfabf8c AA |
1467 | static __be32 |
1468 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1469 | struct nfsd4_compoundres *resp) | |
074fe897 | 1470 | { |
abfabf8c AA |
1471 | struct nfsd4_op *op; |
1472 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1473 | |
abfabf8c AA |
1474 | /* Encode the replayed sequence operation */ |
1475 | op = &args->ops[resp->opcnt - 1]; | |
1476 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1477 | |
abfabf8c | 1478 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1479 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1480 | op = &args->ops[resp->opcnt++]; |
1481 | op->status = nfserr_retry_uncached_rep; | |
1482 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1483 | } |
abfabf8c | 1484 | return op->status; |
074fe897 AA |
1485 | } |
1486 | ||
1487 | /* | |
557ce264 AA |
1488 | * The sequence operation is not cached because we can use the slot and |
1489 | * session values. | |
074fe897 AA |
1490 | */ |
1491 | __be32 | |
bf864a31 AA |
1492 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1493 | struct nfsd4_sequence *seq) | |
074fe897 | 1494 | { |
557ce264 | 1495 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1496 | __be32 status; |
1497 | ||
557ce264 | 1498 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1499 | |
abfabf8c AA |
1500 | /* Either returns 0 or nfserr_retry_uncached */ |
1501 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1502 | if (status == nfserr_retry_uncached_rep) | |
1503 | return status; | |
074fe897 | 1504 | |
557ce264 AA |
1505 | /* The sequence operation has been encoded, cstate->datap set. */ |
1506 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1507 | |
557ce264 AA |
1508 | resp->opcnt = slot->sl_opcnt; |
1509 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1510 | status = slot->sl_status; | |
074fe897 AA |
1511 | |
1512 | return status; | |
1513 | } | |
1514 | ||
0733d213 AA |
1515 | /* |
1516 | * Set the exchange_id flags returned by the server. | |
1517 | */ | |
1518 | static void | |
1519 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1520 | { | |
1521 | /* pNFS is not supported */ | |
1522 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1523 | ||
1524 | /* Referrals are supported, Migration is not. */ | |
1525 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1526 | ||
1527 | /* set the wire flags to return to client. */ | |
1528 | clid->flags = new->cl_exchange_flags; | |
1529 | } | |
1530 | ||
631fc9ea BF |
1531 | static bool client_has_state(struct nfs4_client *clp) |
1532 | { | |
1533 | /* | |
1534 | * Note clp->cl_openowners check isn't quite right: there's no | |
1535 | * need to count owners without stateid's. | |
1536 | * | |
1537 | * Also note we should probably be using this in 4.0 case too. | |
1538 | */ | |
1539 | return list_empty(&clp->cl_openowners) | |
1540 | && list_empty(&clp->cl_delegations) | |
1541 | && list_empty(&clp->cl_sessions); | |
1542 | } | |
1543 | ||
069b6ad4 AA |
1544 | __be32 |
1545 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1546 | struct nfsd4_compound_state *cstate, | |
1547 | struct nfsd4_exchange_id *exid) | |
1548 | { | |
0733d213 | 1549 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1550 | __be32 status; |
0733d213 AA |
1551 | unsigned int strhashval; |
1552 | char dname[HEXDIR_LEN]; | |
363168b4 | 1553 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1554 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1555 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1556 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
0733d213 | 1557 | |
363168b4 | 1558 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1559 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1560 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1561 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1562 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1563 | |
a084daf5 | 1564 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1565 | return nfserr_inval; |
1566 | ||
1567 | /* Currently only support SP4_NONE */ | |
1568 | switch (exid->spa_how) { | |
1569 | case SP4_NONE: | |
1570 | break; | |
1571 | case SP4_SSV: | |
044bc1d4 | 1572 | return nfserr_serverfault; |
0733d213 AA |
1573 | default: |
1574 | BUG(); /* checked by xdr code */ | |
1575 | case SP4_MACH_CRED: | |
1576 | return nfserr_serverfault; /* no excuse :-/ */ | |
1577 | } | |
1578 | ||
1579 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1580 | ||
1581 | if (status) | |
2786cc3a | 1582 | return status; |
0733d213 AA |
1583 | |
1584 | strhashval = clientstr_hashval(dname); | |
1585 | ||
2dbb269d | 1586 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1587 | nfs4_lock_state(); |
e203d506 | 1588 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1589 | if (conf) { |
83e08fd4 BF |
1590 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1591 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1592 | ||
136e658d BF |
1593 | if (update) { |
1594 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1595 | status = nfserr_inval; |
1a308118 BF |
1596 | goto out; |
1597 | } | |
136e658d | 1598 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1599 | status = nfserr_perm; |
136e658d BF |
1600 | goto out; |
1601 | } | |
1602 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1603 | status = nfserr_not_same; |
1604 | goto out; | |
1605 | } | |
136e658d BF |
1606 | /* case 6 */ |
1607 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1608 | new = conf; | |
1609 | goto out_copy; | |
0733d213 | 1610 | } |
136e658d | 1611 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1612 | if (client_has_state(conf)) { |
1613 | status = nfserr_clid_inuse; | |
1614 | goto out; | |
1615 | } | |
1616 | goto expire_client; | |
1a308118 | 1617 | } |
136e658d BF |
1618 | if (verfs_match) { /* case 2 */ |
1619 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1620 | new = conf; | |
1621 | goto out_copy; | |
1622 | } | |
1623 | /* case 5, client reboot */ | |
631fc9ea | 1624 | expire_client: |
136e658d BF |
1625 | expire_client(conf); |
1626 | goto out_new; | |
6ddbbbfe MS |
1627 | } |
1628 | ||
2dbb269d | 1629 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1630 | status = nfserr_noent; |
1631 | goto out; | |
0733d213 AA |
1632 | } |
1633 | ||
e203d506 | 1634 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
2dbb269d | 1635 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1636 | expire_client(unconf); |
0733d213 | 1637 | |
2dbb269d | 1638 | /* case 1 (normal case) */ |
0733d213 | 1639 | out_new: |
b09333c4 | 1640 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1641 | if (new == NULL) { |
4731030d | 1642 | status = nfserr_jukebox; |
0733d213 AA |
1643 | goto out; |
1644 | } | |
1645 | ||
0733d213 | 1646 | gen_clid(new); |
0733d213 AA |
1647 | add_to_unconfirmed(new, strhashval); |
1648 | out_copy: | |
1649 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1650 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1651 | ||
38eb76a5 | 1652 | exid->seqid = 1; |
0733d213 AA |
1653 | nfsd4_set_ex_flags(new, exid); |
1654 | ||
1655 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1656 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1657 | status = nfs_ok; |
1658 | ||
1659 | out: | |
1660 | nfs4_unlock_state(); | |
0733d213 | 1661 | return status; |
069b6ad4 AA |
1662 | } |
1663 | ||
57b7b43b | 1664 | static __be32 |
88e588d5 | 1665 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1666 | { |
88e588d5 AA |
1667 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1668 | slot_seqid); | |
b85d4c01 BH |
1669 | |
1670 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1671 | if (slot_inuse) { |
1672 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1673 | return nfserr_jukebox; |
1674 | else | |
1675 | return nfserr_seq_misordered; | |
1676 | } | |
f6d82485 | 1677 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1678 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1679 | return nfs_ok; |
88e588d5 | 1680 | if (seqid == slot_seqid) |
b85d4c01 | 1681 | return nfserr_replay_cache; |
b85d4c01 BH |
1682 | return nfserr_seq_misordered; |
1683 | } | |
1684 | ||
49557cc7 AA |
1685 | /* |
1686 | * Cache the create session result into the create session single DRC | |
1687 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1688 | * Do this for solo or embedded create session operations. | |
1689 | */ | |
1690 | static void | |
1691 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1692 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1693 | { |
1694 | slot->sl_status = nfserr; | |
1695 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1696 | } | |
1697 | ||
1698 | static __be32 | |
1699 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1700 | struct nfsd4_clid_slot *slot) | |
1701 | { | |
1702 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1703 | return slot->sl_status; | |
1704 | } | |
1705 | ||
1b74c25b MJ |
1706 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1707 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1708 | 1 + /* MIN tag is length with zero, only length */ \ | |
1709 | 3 + /* version, opcount, opcode */ \ | |
1710 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1711 | /* seqid, slotID, slotID, cache */ \ | |
1712 | 4 ) * sizeof(__be32)) | |
1713 | ||
1714 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1715 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1716 | 1 + /* status */ \ | |
1717 | 1 + /* MIN tag is length with zero, only length */ \ | |
1718 | 3 + /* opcount, opcode, opstatus*/ \ | |
1719 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1720 | /* seqid, slotID, slotID, slotID, status */ \ | |
1721 | 5 ) * sizeof(__be32)) | |
1722 | ||
57b7b43b | 1723 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1724 | { |
1725 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1726 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1727 | } | |
1728 | ||
069b6ad4 AA |
1729 | __be32 |
1730 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1731 | struct nfsd4_compound_state *cstate, | |
1732 | struct nfsd4_create_session *cr_ses) | |
1733 | { | |
363168b4 | 1734 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1735 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1736 | struct nfsd4_session *new; |
49557cc7 | 1737 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1738 | bool confirm_me = false; |
57b7b43b | 1739 | __be32 status = 0; |
ec6b5d7b | 1740 | |
a62573dc MJ |
1741 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1742 | return nfserr_inval; | |
1743 | ||
ec6b5d7b AA |
1744 | nfs4_lock_state(); |
1745 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1746 | conf = find_confirmed_client(&cr_ses->clientid); | |
1747 | ||
1748 | if (conf) { | |
49557cc7 AA |
1749 | cs_slot = &conf->cl_cs_slot; |
1750 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1751 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1752 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1753 | cs_slot->sl_seqid); |
38eb76a5 | 1754 | /* Return the cached reply status */ |
49557cc7 | 1755 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1756 | goto out; |
49557cc7 | 1757 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1758 | status = nfserr_seq_misordered; |
1759 | dprintk("Sequence misordered!\n"); | |
1760 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1761 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1762 | goto out; |
1763 | } | |
ec6b5d7b AA |
1764 | } else if (unconf) { |
1765 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1766 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1767 | status = nfserr_clid_inuse; |
1768 | goto out; | |
1769 | } | |
1770 | ||
49557cc7 AA |
1771 | cs_slot = &unconf->cl_cs_slot; |
1772 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1773 | if (status) { |
1774 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1775 | status = nfserr_seq_misordered; |
cd5b8144 | 1776 | goto out; |
ec6b5d7b AA |
1777 | } |
1778 | ||
86c3e16c | 1779 | confirm_me = true; |
ec6b5d7b AA |
1780 | conf = unconf; |
1781 | } else { | |
1782 | status = nfserr_stale_clientid; | |
1783 | goto out; | |
1784 | } | |
1785 | ||
8323c3b2 BF |
1786 | /* |
1787 | * XXX: we should probably set this at creation time, and check | |
1788 | * for consistent minorversion use throughout: | |
1789 | */ | |
1790 | conf->cl_minorversion = 1; | |
408b79bc BF |
1791 | /* |
1792 | * We do not support RDMA or persistent sessions | |
1793 | */ | |
1794 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1795 | cr_ses->flags &= ~SESSION4_RDMA; | |
1796 | ||
1b74c25b MJ |
1797 | status = nfserr_toosmall; |
1798 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1799 | goto out; | |
1800 | ||
ac7c46f2 BF |
1801 | status = nfserr_jukebox; |
1802 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1803 | if (!new) | |
ec6b5d7b | 1804 | goto out; |
ac7c46f2 BF |
1805 | status = nfs_ok; |
1806 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1807 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1808 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1809 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1810 | cs_slot->sl_seqid++; |
49557cc7 | 1811 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1812 | |
49557cc7 AA |
1813 | /* cache solo and embedded create sessions under the state lock */ |
1814 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1815 | if (confirm_me) |
1816 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1817 | out: |
1818 | nfs4_unlock_state(); | |
1819 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1820 | return status; | |
069b6ad4 AA |
1821 | } |
1822 | ||
57716355 BF |
1823 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1824 | { | |
1825 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1826 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1827 | ||
1828 | return argp->opcnt == resp->opcnt; | |
1829 | } | |
1830 | ||
1d1bc8f2 BF |
1831 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1832 | { | |
1833 | switch (*dir) { | |
1834 | case NFS4_CDFC4_FORE: | |
1835 | case NFS4_CDFC4_BACK: | |
1836 | return nfs_ok; | |
1837 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1838 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1839 | *dir = NFS4_CDFC4_BOTH; | |
1840 | return nfs_ok; | |
1841 | }; | |
1842 | return nfserr_inval; | |
1843 | } | |
1844 | ||
1845 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1846 | struct nfsd4_compound_state *cstate, | |
1847 | struct nfsd4_bind_conn_to_session *bcts) | |
1848 | { | |
1849 | __be32 status; | |
1850 | ||
1851 | if (!nfsd4_last_compound_op(rqstp)) | |
1852 | return nfserr_not_only_op; | |
1853 | spin_lock(&client_lock); | |
1854 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1855 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1856 | * client_lock iself: */ | |
1857 | if (cstate->session) { | |
1858 | nfsd4_get_session(cstate->session); | |
1859 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1860 | } | |
1861 | spin_unlock(&client_lock); | |
1862 | if (!cstate->session) | |
1863 | return nfserr_badsession; | |
1864 | ||
1865 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1866 | if (!status) |
1867 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1868 | return status; | |
1d1bc8f2 BF |
1869 | } |
1870 | ||
5d4cec2f BF |
1871 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1872 | { | |
1873 | if (!session) | |
1874 | return 0; | |
1875 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1876 | } | |
1877 | ||
069b6ad4 AA |
1878 | __be32 |
1879 | nfsd4_destroy_session(struct svc_rqst *r, | |
1880 | struct nfsd4_compound_state *cstate, | |
1881 | struct nfsd4_destroy_session *sessionid) | |
1882 | { | |
e10e0cfc | 1883 | struct nfsd4_session *ses; |
57b7b43b | 1884 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1885 | |
1886 | /* Notes: | |
1887 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1888 | * - Should we return nfserr_back_chan_busy if waiting for | |
1889 | * callbacks on to-be-destroyed session? | |
1890 | * - Do we need to clear any callback info from previous session? | |
1891 | */ | |
1892 | ||
5d4cec2f | 1893 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1894 | if (!nfsd4_last_compound_op(r)) |
1895 | return nfserr_not_only_op; | |
1896 | } | |
e10e0cfc | 1897 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1898 | spin_lock(&client_lock); |
e10e0cfc BH |
1899 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1900 | if (!ses) { | |
9089f1b4 | 1901 | spin_unlock(&client_lock); |
e10e0cfc BH |
1902 | goto out; |
1903 | } | |
1904 | ||
1905 | unhash_session(ses); | |
9089f1b4 | 1906 | spin_unlock(&client_lock); |
e10e0cfc | 1907 | |
ab707e15 | 1908 | nfs4_lock_state(); |
84f5f7cc | 1909 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1910 | nfs4_unlock_state(); |
19cf5c02 | 1911 | |
508dc6e1 | 1912 | spin_lock(&client_lock); |
19cf5c02 | 1913 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1914 | nfsd4_put_session_locked(ses); |
1915 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1916 | status = nfs_ok; |
1917 | out: | |
1918 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1919 | return status; | |
069b6ad4 AA |
1920 | } |
1921 | ||
a663bdd8 | 1922 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1923 | { |
1924 | struct nfsd4_conn *c; | |
1925 | ||
1926 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1927 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1928 | return c; |
1929 | } | |
1930 | } | |
1931 | return NULL; | |
1932 | } | |
1933 | ||
a663bdd8 | 1934 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1935 | { |
1936 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1937 | struct nfsd4_conn *c; |
21b75b01 | 1938 | int ret; |
328ead28 BF |
1939 | |
1940 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1941 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1942 | if (c) { |
1943 | spin_unlock(&clp->cl_lock); | |
1944 | free_conn(new); | |
1945 | return; | |
1946 | } | |
1947 | __nfsd4_hash_conn(new, ses); | |
1948 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1949 | ret = nfsd4_register_conn(new); |
1950 | if (ret) | |
1951 | /* oops; xprt is already down: */ | |
1952 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1953 | return; |
1954 | } | |
1955 | ||
868b89c3 MJ |
1956 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1957 | { | |
1958 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1959 | ||
1960 | return args->opcnt > session->se_fchannel.maxops; | |
1961 | } | |
1962 | ||
ae82a8d0 MJ |
1963 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1964 | struct nfsd4_session *session) | |
1965 | { | |
1966 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1967 | ||
1968 | return xb->len > session->se_fchannel.maxreq_sz; | |
1969 | } | |
1970 | ||
069b6ad4 | 1971 | __be32 |
b85d4c01 | 1972 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1973 | struct nfsd4_compound_state *cstate, |
1974 | struct nfsd4_sequence *seq) | |
1975 | { | |
f9bb94c4 | 1976 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1977 | struct nfsd4_session *session; |
1978 | struct nfsd4_slot *slot; | |
a663bdd8 | 1979 | struct nfsd4_conn *conn; |
57b7b43b | 1980 | __be32 status; |
b85d4c01 | 1981 | |
f9bb94c4 AA |
1982 | if (resp->opcnt != 1) |
1983 | return nfserr_sequence_pos; | |
1984 | ||
a663bdd8 BF |
1985 | /* |
1986 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1987 | * below. | |
1988 | */ | |
1989 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1990 | if (!conn) | |
1991 | return nfserr_jukebox; | |
1992 | ||
9089f1b4 | 1993 | spin_lock(&client_lock); |
b85d4c01 BH |
1994 | status = nfserr_badsession; |
1995 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1996 | if (!session) | |
1997 | goto out; | |
1998 | ||
868b89c3 MJ |
1999 | status = nfserr_too_many_ops; |
2000 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
2001 | goto out; | |
2002 | ||
ae82a8d0 MJ |
2003 | status = nfserr_req_too_big; |
2004 | if (nfsd4_request_too_big(rqstp, session)) | |
2005 | goto out; | |
2006 | ||
b85d4c01 | 2007 | status = nfserr_badslot; |
6c18ba9f | 2008 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
2009 | goto out; |
2010 | ||
557ce264 | 2011 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2012 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2013 | ||
a8dfdaeb AA |
2014 | /* We do not negotiate the number of slots yet, so set the |
2015 | * maxslots to the session maxreqs which is used to encode | |
2016 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2017 | seq->maxslots = session->se_fchannel.maxreqs; | |
2018 | ||
73e79482 BF |
2019 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2020 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2021 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2022 | status = nfserr_seq_misordered; |
2023 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
2024 | goto out; | |
b85d4c01 BH |
2025 | cstate->slot = slot; |
2026 | cstate->session = session; | |
da3846a2 | 2027 | /* Return the cached reply status and set cstate->status |
557ce264 | 2028 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2029 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2030 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2031 | goto out; |
b85d4c01 BH |
2032 | } |
2033 | if (status) | |
2034 | goto out; | |
2035 | ||
a663bdd8 BF |
2036 | nfsd4_sequence_check_conn(conn, session); |
2037 | conn = NULL; | |
328ead28 | 2038 | |
b85d4c01 | 2039 | /* Success! bump slot seqid */ |
b85d4c01 | 2040 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2041 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2042 | if (seq->cachethis) |
2043 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2044 | else |
2045 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2046 | |
2047 | cstate->slot = slot; | |
2048 | cstate->session = session; | |
2049 | ||
b85d4c01 | 2050 | out: |
26c0c75e | 2051 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2052 | if (cstate->session) { |
0d7bb719 BF |
2053 | struct nfs4_client *clp = session->se_client; |
2054 | ||
36acb66b | 2055 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2056 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2057 | switch (clp->cl_cb_state) { |
2058 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2059 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2060 | break; |
2061 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2062 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2063 | break; |
fc0c3dd1 BH |
2064 | default: |
2065 | seq->status_flags = 0; | |
5423732a | 2066 | } |
aaf84eb9 | 2067 | } |
a663bdd8 | 2068 | kfree(conn); |
36acb66b | 2069 | spin_unlock(&client_lock); |
b85d4c01 BH |
2070 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2071 | return status; | |
069b6ad4 AA |
2072 | } |
2073 | ||
345c2842 MJ |
2074 | static inline bool has_resources(struct nfs4_client *clp) |
2075 | { | |
2076 | return !list_empty(&clp->cl_openowners) | |
2077 | || !list_empty(&clp->cl_delegations) | |
2078 | || !list_empty(&clp->cl_sessions); | |
2079 | } | |
2080 | ||
2081 | __be32 | |
2082 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2083 | { | |
2084 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2085 | __be32 status = 0; |
345c2842 MJ |
2086 | |
2087 | nfs4_lock_state(); | |
2088 | unconf = find_unconfirmed_client(&dc->clientid); | |
2089 | conf = find_confirmed_client(&dc->clientid); | |
2090 | ||
2091 | if (conf) { | |
2092 | clp = conf; | |
2093 | ||
2094 | if (!is_client_expired(conf) && has_resources(conf)) { | |
2095 | status = nfserr_clientid_busy; | |
2096 | goto out; | |
2097 | } | |
2098 | ||
2099 | /* rfc5661 18.50.3 */ | |
2100 | if (cstate->session && conf == cstate->session->se_client) { | |
2101 | status = nfserr_clientid_busy; | |
2102 | goto out; | |
2103 | } | |
2104 | } else if (unconf) | |
2105 | clp = unconf; | |
2106 | else { | |
2107 | status = nfserr_stale_clientid; | |
2108 | goto out; | |
2109 | } | |
2110 | ||
2111 | expire_client(clp); | |
2112 | out: | |
2113 | nfs4_unlock_state(); | |
2114 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2115 | return status; | |
2116 | } | |
2117 | ||
4dc6ec00 BF |
2118 | __be32 |
2119 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2120 | { | |
57b7b43b | 2121 | __be32 status = 0; |
bcecf1cc | 2122 | |
4dc6ec00 BF |
2123 | if (rc->rca_one_fs) { |
2124 | if (!cstate->current_fh.fh_dentry) | |
2125 | return nfserr_nofilehandle; | |
2126 | /* | |
2127 | * We don't take advantage of the rca_one_fs case. | |
2128 | * That's OK, it's optional, we can safely ignore it. | |
2129 | */ | |
2130 | return nfs_ok; | |
2131 | } | |
bcecf1cc | 2132 | |
4dc6ec00 | 2133 | nfs4_lock_state(); |
bcecf1cc | 2134 | status = nfserr_complete_already; |
a52d726b JL |
2135 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2136 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2137 | goto out; |
2138 | ||
2139 | status = nfserr_stale_clientid; | |
2140 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2141 | /* |
2142 | * The following error isn't really legal. | |
2143 | * But we only get here if the client just explicitly | |
2144 | * destroyed the client. Surely it no longer cares what | |
2145 | * error it gets back on an operation for the dead | |
2146 | * client. | |
2147 | */ | |
bcecf1cc MJ |
2148 | goto out; |
2149 | ||
2150 | status = nfs_ok; | |
2a4317c5 | 2151 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2152 | out: |
4dc6ec00 | 2153 | nfs4_unlock_state(); |
bcecf1cc | 2154 | return status; |
4dc6ec00 BF |
2155 | } |
2156 | ||
b37ad28b | 2157 | __be32 |
b591480b BF |
2158 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2159 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2160 | { |
a084daf5 | 2161 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
2162 | nfs4_verifier clverifier = setclid->se_verf; |
2163 | unsigned int strhashval; | |
28ce6054 | 2164 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2165 | __be32 status; |
a55370a3 | 2166 | char dname[HEXDIR_LEN]; |
1da177e4 | 2167 | |
a55370a3 N |
2168 | status = nfs4_make_rec_clidname(dname, &clname); |
2169 | if (status) | |
73aea4ec | 2170 | return status; |
a55370a3 | 2171 | |
1da177e4 LT |
2172 | /* |
2173 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2174 | * We get here on a DRC miss. | |
2175 | */ | |
2176 | ||
a55370a3 | 2177 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2178 | |
1da177e4 | 2179 | nfs4_lock_state(); |
e203d506 | 2180 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2181 | if (conf) { |
a186e767 | 2182 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 2183 | status = nfserr_clid_inuse; |
e203d506 BF |
2184 | if (clp_used_exchangeid(conf)) |
2185 | goto out; | |
026722c2 | 2186 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2187 | char addr_str[INET6_ADDRSTRLEN]; |
2188 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2189 | sizeof(addr_str)); | |
2190 | dprintk("NFSD: setclientid: string in use by client " | |
2191 | "at %s\n", addr_str); | |
1da177e4 LT |
2192 | goto out; |
2193 | } | |
1da177e4 | 2194 | } |
a186e767 BF |
2195 | /* |
2196 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2197 | * has a description of SETCLIENTID request processing consisting | |
2198 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2199 | */ | |
e203d506 | 2200 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2201 | status = nfserr_jukebox; |
1da177e4 | 2202 | if (!conf) { |
a186e767 BF |
2203 | /* |
2204 | * RFC 3530 14.2.33 CASE 4: | |
2205 | * placed first, because it is the normal case | |
1da177e4 LT |
2206 | */ |
2207 | if (unconf) | |
2208 | expire_client(unconf); | |
b09333c4 | 2209 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2210 | if (new == NULL) |
1da177e4 | 2211 | goto out; |
1da177e4 | 2212 | gen_clid(new); |
599e0a22 | 2213 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2214 | /* |
a186e767 BF |
2215 | * RFC 3530 14.2.33 CASE 1: |
2216 | * probable callback update | |
1da177e4 | 2217 | */ |
31f4a6c1 N |
2218 | if (unconf) { |
2219 | /* Note this is removing unconfirmed {*x***}, | |
2220 | * which is stronger than RFC recommended {vxc**}. | |
2221 | * This has the advantage that there is at most | |
2222 | * one {*x***} in either list at any time. | |
2223 | */ | |
2224 | expire_client(unconf); | |
1da177e4 | 2225 | } |
b09333c4 | 2226 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2227 | if (new == NULL) |
1da177e4 | 2228 | goto out; |
1da177e4 | 2229 | copy_clid(new, conf); |
1da177e4 LT |
2230 | } else if (!unconf) { |
2231 | /* | |
a186e767 BF |
2232 | * RFC 3530 14.2.33 CASE 2: |
2233 | * probable client reboot; state will be removed if | |
2234 | * confirmed. | |
1da177e4 | 2235 | */ |
b09333c4 | 2236 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2237 | if (new == NULL) |
1da177e4 | 2238 | goto out; |
1da177e4 | 2239 | gen_clid(new); |
49ba8781 | 2240 | } else { |
a186e767 BF |
2241 | /* |
2242 | * RFC 3530 14.2.33 CASE 3: | |
2243 | * probable client reboot; state will be removed if | |
2244 | * confirmed. | |
1da177e4 LT |
2245 | */ |
2246 | expire_client(unconf); | |
b09333c4 | 2247 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2248 | if (new == NULL) |
1da177e4 | 2249 | goto out; |
1da177e4 | 2250 | gen_clid(new); |
1da177e4 | 2251 | } |
8323c3b2 BF |
2252 | /* |
2253 | * XXX: we should probably set this at creation time, and check | |
2254 | * for consistent minorversion use throughout: | |
2255 | */ | |
2256 | new->cl_minorversion = 0; | |
6f3d772f | 2257 | gen_callback(new, setclid, rqstp); |
c175b83c | 2258 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2259 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2260 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2261 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2262 | status = nfs_ok; | |
2263 | out: | |
2264 | nfs4_unlock_state(); | |
2265 | return status; | |
2266 | } | |
2267 | ||
2268 | ||
2269 | /* | |
a186e767 BF |
2270 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2271 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2272 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2273 | */ |
b37ad28b | 2274 | __be32 |
b591480b BF |
2275 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2276 | struct nfsd4_compound_state *cstate, | |
2277 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2278 | { |
21ab45a4 | 2279 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2280 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2281 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2282 | __be32 status; |
1da177e4 LT |
2283 | |
2284 | if (STALE_CLIENTID(clid)) | |
2285 | return nfserr_stale_clientid; | |
2286 | /* | |
2287 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2288 | * We get here on a DRC miss. | |
2289 | */ | |
2290 | ||
2291 | nfs4_lock_state(); | |
21ab45a4 N |
2292 | |
2293 | conf = find_confirmed_client(clid); | |
2294 | unconf = find_unconfirmed_client(clid); | |
2295 | ||
a186e767 BF |
2296 | /* |
2297 | * section 14.2.34 of RFC 3530 has a description of | |
2298 | * SETCLIENTID_CONFIRM request processing consisting | |
2299 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2300 | */ | |
f07ea10d | 2301 | status = nfserr_clid_inuse; |
366e0c1d | 2302 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2303 | /* |
2304 | * RFC 3530 14.2.34 CASE 1: | |
2305 | * callback update | |
2306 | */ | |
599e0a22 | 2307 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2308 | status = nfserr_clid_inuse; |
2309 | else { | |
5a3c9d71 BF |
2310 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2311 | nfsd4_probe_callback(conf); | |
1a69c179 | 2312 | expire_client(unconf); |
1da177e4 LT |
2313 | status = nfs_ok; |
2314 | } | |
f3aba4e5 | 2315 | } else if (conf && !unconf) { |
a186e767 BF |
2316 | /* |
2317 | * RFC 3530 14.2.34 CASE 2: | |
2318 | * probable retransmitted request; play it safe and | |
2319 | * do nothing. | |
7c79f737 | 2320 | */ |
599e0a22 | 2321 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2322 | status = nfserr_clid_inuse; |
21ab45a4 | 2323 | else |
1da177e4 | 2324 | status = nfs_ok; |
7c79f737 | 2325 | } else if (!conf && unconf |
599e0a22 | 2326 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2327 | /* |
2328 | * RFC 3530 14.2.34 CASE 3: | |
2329 | * Normal case; new or rebooted client: | |
7c79f737 | 2330 | */ |
599e0a22 | 2331 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2332 | status = nfserr_clid_inuse; |
2333 | } else { | |
1a69c179 N |
2334 | unsigned int hash = |
2335 | clientstr_hashval(unconf->cl_recdir); | |
2336 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2337 | hash); |
1a69c179 | 2338 | if (conf) { |
2a4317c5 | 2339 | nfsd4_client_record_remove(conf); |
1a69c179 N |
2340 | expire_client(conf); |
2341 | } | |
1da177e4 | 2342 | move_to_confirmed(unconf); |
21ab45a4 | 2343 | conf = unconf; |
5a3c9d71 | 2344 | nfsd4_probe_callback(conf); |
1a69c179 | 2345 | status = nfs_ok; |
1da177e4 | 2346 | } |
599e0a22 BF |
2347 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2348 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2349 | &confirm)))) { |
a186e767 BF |
2350 | /* |
2351 | * RFC 3530 14.2.34 CASE 4: | |
2352 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2353 | */ |
1da177e4 | 2354 | status = nfserr_stale_clientid; |
08e8987c | 2355 | } |
f07ea10d | 2356 | |
1da177e4 LT |
2357 | nfs4_unlock_state(); |
2358 | return status; | |
2359 | } | |
2360 | ||
32513b40 BF |
2361 | static struct nfs4_file *nfsd4_alloc_file(void) |
2362 | { | |
2363 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2364 | } | |
2365 | ||
1da177e4 | 2366 | /* OPEN Share state helper functions */ |
32513b40 | 2367 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2368 | { |
1da177e4 LT |
2369 | unsigned int hashval = file_hashval(ino); |
2370 | ||
32513b40 BF |
2371 | atomic_set(&fp->fi_ref, 1); |
2372 | INIT_LIST_HEAD(&fp->fi_hash); | |
2373 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2374 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2375 | fp->fi_inode = igrab(ino); | |
2376 | fp->fi_had_conflict = false; | |
2377 | fp->fi_lease = NULL; | |
2378 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2379 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2380 | spin_lock(&recall_lock); | |
2381 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2382 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2383 | } |
2384 | ||
e60d4398 | 2385 | static void |
e18b890b | 2386 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2387 | { |
e60d4398 N |
2388 | if (*slab == NULL) |
2389 | return; | |
1a1d92c1 | 2390 | kmem_cache_destroy(*slab); |
e60d4398 | 2391 | *slab = NULL; |
1da177e4 LT |
2392 | } |
2393 | ||
e8ff2a84 | 2394 | void |
1da177e4 LT |
2395 | nfsd4_free_slabs(void) |
2396 | { | |
fe0750e5 BF |
2397 | nfsd4_free_slab(&openowner_slab); |
2398 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2399 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2400 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2401 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2402 | } |
1da177e4 | 2403 | |
72083396 | 2404 | int |
e60d4398 N |
2405 | nfsd4_init_slabs(void) |
2406 | { | |
fe0750e5 BF |
2407 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2408 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2409 | if (openowner_slab == NULL) | |
2410 | goto out_nomem; | |
2411 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2412 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2413 | if (lockowner_slab == NULL) | |
e60d4398 N |
2414 | goto out_nomem; |
2415 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2416 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2417 | if (file_slab == NULL) |
2418 | goto out_nomem; | |
5ac049ac | 2419 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2420 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2421 | if (stateid_slab == NULL) |
2422 | goto out_nomem; | |
5b2d21c1 | 2423 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2424 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2425 | if (deleg_slab == NULL) |
2426 | goto out_nomem; | |
e60d4398 N |
2427 | return 0; |
2428 | out_nomem: | |
2429 | nfsd4_free_slabs(); | |
2430 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2431 | return -ENOMEM; | |
1da177e4 LT |
2432 | } |
2433 | ||
fe0750e5 BF |
2434 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2435 | { | |
2436 | kfree(oo->oo_owner.so_owner.data); | |
2437 | kmem_cache_free(openowner_slab, oo); | |
2438 | } | |
2439 | ||
2440 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2441 | { |
fe0750e5 BF |
2442 | kfree(lo->lo_owner.so_owner.data); |
2443 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2444 | } |
2445 | ||
ff194bd9 | 2446 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2447 | { |
ff194bd9 BF |
2448 | rp->rp_status = nfserr_serverfault; |
2449 | rp->rp_buflen = 0; | |
2450 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2451 | } |
2452 | ||
fe0750e5 | 2453 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2454 | { |
1da177e4 | 2455 | struct nfs4_stateowner *sop; |
1da177e4 | 2456 | |
fe0750e5 | 2457 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2458 | if (!sop) |
2459 | return NULL; | |
2460 | ||
2461 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2462 | if (!sop->so_owner.data) { | |
fe0750e5 | 2463 | kmem_cache_free(slab, sop); |
1da177e4 | 2464 | return NULL; |
ff194bd9 BF |
2465 | } |
2466 | sop->so_owner.len = owner->len; | |
2467 | ||
ea1da636 | 2468 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2469 | sop->so_client = clp; |
2470 | init_nfs4_replay(&sop->so_replay); | |
2471 | return sop; | |
2472 | } | |
2473 | ||
fe0750e5 | 2474 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2475 | { |
16bfdaaf | 2476 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2477 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2478 | } |
2479 | ||
fe0750e5 | 2480 | static struct nfs4_openowner * |
ff194bd9 | 2481 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2482 | struct nfs4_openowner *oo; |
ff194bd9 | 2483 | |
fe0750e5 BF |
2484 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2485 | if (!oo) | |
ff194bd9 | 2486 | return NULL; |
fe0750e5 BF |
2487 | oo->oo_owner.so_is_open_owner = 1; |
2488 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2489 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2490 | oo->oo_time = 0; |
38c387b5 | 2491 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2492 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2493 | hash_openowner(oo, clp, strhashval); | |
2494 | return oo; | |
1da177e4 LT |
2495 | } |
2496 | ||
996e0938 | 2497 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2498 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2499 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2500 | |
996e0938 | 2501 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2502 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2503 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2504 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2505 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2506 | get_nfs4_file(fp); |
1da177e4 | 2507 | stp->st_file = fp; |
1da177e4 LT |
2508 | stp->st_access_bmap = 0; |
2509 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2510 | set_access(open->op_share_access, stp); |
ce0fc43c | 2511 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2512 | stp->st_openstp = NULL; |
1da177e4 LT |
2513 | } |
2514 | ||
fd39ca9a | 2515 | static void |
fe0750e5 | 2516 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2517 | { |
fe0750e5 | 2518 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2519 | |
fe0750e5 BF |
2520 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2521 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2522 | } |
2523 | ||
1da177e4 | 2524 | static int |
599e0a22 BF |
2525 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2526 | clientid_t *clid) | |
2527 | { | |
2528 | return (sop->so_owner.len == owner->len) && | |
2529 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2530 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2531 | } |
2532 | ||
fe0750e5 | 2533 | static struct nfs4_openowner * |
1da177e4 LT |
2534 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2535 | { | |
a50d2ad1 BF |
2536 | struct nfs4_stateowner *so; |
2537 | struct nfs4_openowner *oo; | |
1da177e4 | 2538 | |
16bfdaaf BF |
2539 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2540 | if (!so->so_is_open_owner) | |
2541 | continue; | |
a50d2ad1 BF |
2542 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2543 | oo = openowner(so); | |
2544 | renew_client(oo->oo_owner.so_client); | |
2545 | return oo; | |
2546 | } | |
1da177e4 LT |
2547 | } |
2548 | return NULL; | |
2549 | } | |
2550 | ||
2551 | /* search file_hashtbl[] for file */ | |
2552 | static struct nfs4_file * | |
2553 | find_file(struct inode *ino) | |
2554 | { | |
2555 | unsigned int hashval = file_hashval(ino); | |
2556 | struct nfs4_file *fp; | |
2557 | ||
8b671b80 | 2558 | spin_lock(&recall_lock); |
1da177e4 | 2559 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2560 | if (fp->fi_inode == ino) { |
2561 | get_nfs4_file(fp); | |
8b671b80 | 2562 | spin_unlock(&recall_lock); |
1da177e4 | 2563 | return fp; |
13cd2184 | 2564 | } |
1da177e4 | 2565 | } |
8b671b80 | 2566 | spin_unlock(&recall_lock); |
1da177e4 LT |
2567 | return NULL; |
2568 | } | |
2569 | ||
1da177e4 LT |
2570 | /* |
2571 | * Called to check deny when READ with all zero stateid or | |
2572 | * WRITE with all zero or all one stateid | |
2573 | */ | |
b37ad28b | 2574 | static __be32 |
1da177e4 LT |
2575 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2576 | { | |
2577 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2578 | struct nfs4_file *fp; | |
dcef0413 | 2579 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2580 | __be32 ret; |
1da177e4 LT |
2581 | |
2582 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2583 | ||
2584 | fp = find_file(ino); | |
13cd2184 N |
2585 | if (!fp) |
2586 | return nfs_ok; | |
b700949b | 2587 | ret = nfserr_locked; |
1da177e4 | 2588 | /* Search for conflicting share reservations */ |
13cd2184 | 2589 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2590 | if (test_deny(deny_type, stp) || |
2591 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2592 | goto out; |
1da177e4 | 2593 | } |
13cd2184 N |
2594 | ret = nfs_ok; |
2595 | out: | |
2596 | put_nfs4_file(fp); | |
2597 | return ret; | |
1da177e4 LT |
2598 | } |
2599 | ||
6b57d9c8 | 2600 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2601 | { |
1da177e4 LT |
2602 | /* We're assuming the state code never drops its reference |
2603 | * without first removing the lease. Since we're in this lease | |
2604 | * callback (and since the lease code is serialized by the kernel | |
2605 | * lock) we know the server hasn't removed the lease yet, we know | |
2606 | * it's safe to take a reference: */ | |
2607 | atomic_inc(&dp->dl_count); | |
2608 | ||
1da177e4 | 2609 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2610 | |
460781b5 | 2611 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2612 | dp->dl_time = get_seconds(); |
2613 | ||
6b57d9c8 BF |
2614 | nfsd4_cb_recall(dp); |
2615 | } | |
2616 | ||
acfdf5c3 | 2617 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2618 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2619 | { | |
acfdf5c3 BF |
2620 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2621 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2622 | |
acfdf5c3 BF |
2623 | BUG_ON(!fp); |
2624 | /* We assume break_lease is only called once per lease: */ | |
2625 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2626 | /* |
2627 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2628 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2629 | * in time: |
0272e1fd BF |
2630 | */ |
2631 | fl->fl_break_time = 0; | |
1da177e4 | 2632 | |
5d926e8c | 2633 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2634 | fp->fi_had_conflict = true; |
2635 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2636 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2637 | spin_unlock(&recall_lock); |
1da177e4 LT |
2638 | } |
2639 | ||
1da177e4 LT |
2640 | static |
2641 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2642 | { | |
2643 | if (arg & F_UNLCK) | |
2644 | return lease_modify(onlist, arg); | |
2645 | else | |
2646 | return -EAGAIN; | |
2647 | } | |
2648 | ||
7b021967 | 2649 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2650 | .lm_break = nfsd_break_deleg_cb, |
2651 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2652 | }; |
2653 | ||
7a8711c9 BF |
2654 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2655 | { | |
2656 | if (nfsd4_has_session(cstate)) | |
2657 | return nfs_ok; | |
2658 | if (seqid == so->so_seqid - 1) | |
2659 | return nfserr_replay_me; | |
2660 | if (seqid == so->so_seqid) | |
2661 | return nfs_ok; | |
2662 | return nfserr_bad_seqid; | |
2663 | } | |
1da177e4 | 2664 | |
b37ad28b | 2665 | __be32 |
6668958f AA |
2666 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2667 | struct nfsd4_open *open) | |
1da177e4 | 2668 | { |
1da177e4 LT |
2669 | clientid_t *clientid = &open->op_clientid; |
2670 | struct nfs4_client *clp = NULL; | |
2671 | unsigned int strhashval; | |
fe0750e5 | 2672 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2673 | __be32 status; |
1da177e4 | 2674 | |
1da177e4 LT |
2675 | if (STALE_CLIENTID(&open->op_clientid)) |
2676 | return nfserr_stale_clientid; | |
32513b40 BF |
2677 | /* |
2678 | * In case we need it later, after we've already created the | |
2679 | * file and don't want to risk a further failure: | |
2680 | */ | |
2681 | open->op_file = nfsd4_alloc_file(); | |
2682 | if (open->op_file == NULL) | |
2683 | return nfserr_jukebox; | |
1da177e4 | 2684 | |
16bfdaaf | 2685 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2686 | oo = find_openstateowner_str(strhashval, open); |
2687 | open->op_openowner = oo; | |
2688 | if (!oo) { | |
1da177e4 LT |
2689 | clp = find_confirmed_client(clientid); |
2690 | if (clp == NULL) | |
0f442aa2 | 2691 | return nfserr_expired; |
bcf130f9 | 2692 | goto new_owner; |
1da177e4 | 2693 | } |
dad1c067 | 2694 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2695 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2696 | clp = oo->oo_owner.so_client; |
2697 | release_openowner(oo); | |
2698 | open->op_openowner = NULL; | |
bcf130f9 | 2699 | goto new_owner; |
0f442aa2 | 2700 | } |
4cdc951b BF |
2701 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2702 | if (status) | |
2703 | return status; | |
2704 | clp = oo->oo_owner.so_client; | |
2705 | goto alloc_stateid; | |
bcf130f9 BF |
2706 | new_owner: |
2707 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2708 | if (oo == NULL) | |
2709 | return nfserr_jukebox; | |
2710 | open->op_openowner = oo; | |
4cdc951b BF |
2711 | alloc_stateid: |
2712 | open->op_stp = nfs4_alloc_stateid(clp); | |
2713 | if (!open->op_stp) | |
2714 | return nfserr_jukebox; | |
0f442aa2 | 2715 | return nfs_ok; |
1da177e4 LT |
2716 | } |
2717 | ||
b37ad28b | 2718 | static inline __be32 |
4a6e43e6 N |
2719 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2720 | { | |
2721 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2722 | return nfserr_openmode; | |
2723 | else | |
2724 | return nfs_ok; | |
2725 | } | |
2726 | ||
f459e453 | 2727 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2728 | { |
f459e453 | 2729 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2730 | } |
2731 | ||
38c2f4b1 | 2732 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2733 | { |
f459e453 | 2734 | struct nfs4_stid *ret; |
24a0111e | 2735 | |
38c2f4b1 | 2736 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2737 | if (!ret) |
2738 | return NULL; | |
2739 | return delegstateid(ret); | |
24a0111e BF |
2740 | } |
2741 | ||
8b289b2c BF |
2742 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2743 | { | |
2744 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2745 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2746 | } | |
2747 | ||
b37ad28b | 2748 | static __be32 |
38c2f4b1 | 2749 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2750 | struct nfs4_delegation **dp) |
2751 | { | |
2752 | int flags; | |
b37ad28b | 2753 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2754 | |
38c2f4b1 | 2755 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2756 | if (*dp == NULL) |
c44c5eeb | 2757 | goto out; |
24a0111e | 2758 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2759 | status = nfs4_check_delegmode(*dp, flags); |
2760 | if (status) | |
2761 | *dp = NULL; | |
c44c5eeb | 2762 | out: |
8b289b2c | 2763 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2764 | return nfs_ok; |
2765 | if (status) | |
2766 | return status; | |
dad1c067 | 2767 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2768 | return nfs_ok; |
567d9829 N |
2769 | } |
2770 | ||
b37ad28b | 2771 | static __be32 |
dcef0413 | 2772 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2773 | { |
dcef0413 | 2774 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2775 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2776 | |
8beefa24 | 2777 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2778 | /* ignore lock owners */ |
2779 | if (local->st_stateowner->so_is_open_owner == 0) | |
2780 | continue; | |
2781 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2782 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2783 | *stpp = local; |
2784 | /* check for conflicting share reservations */ | |
2785 | if (!test_share(local, open)) | |
77eaae8d | 2786 | return nfserr_share_denied; |
1da177e4 | 2787 | } |
77eaae8d | 2788 | return nfs_ok; |
1da177e4 LT |
2789 | } |
2790 | ||
996e0938 BF |
2791 | static void nfs4_free_stateid(struct nfs4_ol_stateid *s) |
2792 | { | |
2793 | kmem_cache_free(stateid_slab, s); | |
5ac049ac N |
2794 | } |
2795 | ||
21fb4016 BF |
2796 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2797 | { | |
2798 | int flags = 0; | |
2799 | ||
2800 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2801 | flags |= NFSD_MAY_READ; | |
2802 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2803 | flags |= NFSD_MAY_WRITE; | |
2804 | return flags; | |
2805 | } | |
2806 | ||
0c12eaff CB |
2807 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2808 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2809 | { |
2810 | __be32 status; | |
0c12eaff CB |
2811 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2812 | int access = nfs4_access_to_access(open->op_share_access); | |
2813 | ||
f9d7562f BF |
2814 | if (!fp->fi_fds[oflag]) { |
2815 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2816 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2817 | if (status) |
2818 | return status; | |
2819 | } | |
2820 | nfs4_file_get_access(fp, oflag); | |
2821 | ||
2822 | return nfs_ok; | |
2823 | } | |
2824 | ||
b37ad28b | 2825 | static inline __be32 |
1da177e4 LT |
2826 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2827 | struct nfsd4_open *open) | |
2828 | { | |
2829 | struct iattr iattr = { | |
2830 | .ia_valid = ATTR_SIZE, | |
2831 | .ia_size = 0, | |
2832 | }; | |
2833 | if (!open->op_truncate) | |
2834 | return 0; | |
2835 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2836 | return nfserr_inval; |
1da177e4 LT |
2837 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2838 | } | |
2839 | ||
b37ad28b | 2840 | static __be32 |
dcef0413 | 2841 | 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 | 2842 | { |
b6d2f1ca | 2843 | u32 op_share_access = open->op_share_access; |
7d947842 | 2844 | bool new_access; |
b37ad28b | 2845 | __be32 status; |
1da177e4 | 2846 | |
82c5ff1b | 2847 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2848 | if (new_access) { |
0c12eaff | 2849 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2850 | if (status) |
2851 | return status; | |
6c26d08f | 2852 | } |
1da177e4 LT |
2853 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2854 | if (status) { | |
f9d7562f | 2855 | if (new_access) { |
f197c271 | 2856 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2857 | nfs4_file_put_access(fp, oflag); |
2858 | } | |
1da177e4 LT |
2859 | return status; |
2860 | } | |
2861 | /* remember the open */ | |
82c5ff1b | 2862 | set_access(op_share_access, stp); |
ce0fc43c | 2863 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2864 | |
2865 | return nfs_ok; | |
2866 | } | |
2867 | ||
2868 | ||
1da177e4 | 2869 | static void |
1255a8f3 | 2870 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2871 | { |
dad1c067 | 2872 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2873 | } |
2874 | ||
14a24e99 BF |
2875 | /* Should we give out recallable state?: */ |
2876 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2877 | { | |
2878 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2879 | return true; | |
2880 | /* | |
2881 | * In the sessions case, since we don't have to establish a | |
2882 | * separate connection for callbacks, we assume it's OK | |
2883 | * until we hear otherwise: | |
2884 | */ | |
2885 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2886 | } | |
2887 | ||
22d38c4c BF |
2888 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2889 | { | |
2890 | struct file_lock *fl; | |
2891 | ||
2892 | fl = locks_alloc_lock(); | |
2893 | if (!fl) | |
2894 | return NULL; | |
2895 | locks_init_lock(fl); | |
2896 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2897 | fl->fl_flags = FL_LEASE; | |
2898 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2899 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2900 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2901 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2902 | return fl; |
2903 | } | |
2904 | ||
edab9782 BF |
2905 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2906 | { | |
acfdf5c3 | 2907 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2908 | struct file_lock *fl; |
2909 | int status; | |
2910 | ||
2911 | fl = nfs4_alloc_init_lease(dp, flag); | |
2912 | if (!fl) | |
2913 | return -ENOMEM; | |
acfdf5c3 | 2914 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2915 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2916 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2917 | if (status) { |
acfdf5c3 | 2918 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2919 | locks_free_lock(fl); |
2920 | return -ENOMEM; | |
2921 | } | |
acfdf5c3 BF |
2922 | fp->fi_lease = fl; |
2923 | fp->fi_deleg_file = fl->fl_file; | |
2924 | get_file(fp->fi_deleg_file); | |
2925 | atomic_set(&fp->fi_delegees, 1); | |
2926 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2927 | return 0; | |
2928 | } | |
2929 | ||
2930 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2931 | { | |
2932 | struct nfs4_file *fp = dp->dl_file; | |
2933 | ||
2934 | if (!fp->fi_lease) | |
2935 | return nfs4_setlease(dp, flag); | |
2936 | spin_lock(&recall_lock); | |
2937 | if (fp->fi_had_conflict) { | |
2938 | spin_unlock(&recall_lock); | |
2939 | return -EAGAIN; | |
2940 | } | |
2941 | atomic_inc(&fp->fi_delegees); | |
2942 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2943 | spin_unlock(&recall_lock); | |
2a74aba7 | 2944 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2945 | return 0; |
2946 | } | |
2947 | ||
4aa8913c BH |
2948 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2949 | { | |
2950 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2951 | if (status == -EAGAIN) | |
2952 | open->op_why_no_deleg = WND4_CONTENTION; | |
2953 | else { | |
2954 | open->op_why_no_deleg = WND4_RESOURCE; | |
2955 | switch (open->op_deleg_want) { | |
2956 | case NFS4_SHARE_WANT_READ_DELEG: | |
2957 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2958 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2959 | break; | |
2960 | case NFS4_SHARE_WANT_CANCEL: | |
2961 | open->op_why_no_deleg = WND4_CANCELLED; | |
2962 | break; | |
2963 | case NFS4_SHARE_WANT_NO_DELEG: | |
2964 | BUG(); /* not supposed to get here */ | |
2965 | } | |
2966 | } | |
2967 | } | |
2968 | ||
1da177e4 LT |
2969 | /* |
2970 | * Attempt to hand out a delegation. | |
2971 | */ | |
2972 | static void | |
dcef0413 | 2973 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2974 | { |
2975 | struct nfs4_delegation *dp; | |
fe0750e5 | 2976 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2977 | int cb_up; |
d24433cd | 2978 | int status = 0, flag = 0; |
1da177e4 | 2979 | |
fe0750e5 | 2980 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2981 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2982 | open->op_recall = 0; |
2983 | switch (open->op_claim_type) { | |
2984 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2985 | if (!cb_up) |
7b190fec N |
2986 | open->op_recall = 1; |
2987 | flag = open->op_delegate_type; | |
2988 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2989 | goto out; | |
2990 | break; | |
2991 | case NFS4_OPEN_CLAIM_NULL: | |
2992 | /* Let's not give out any delegations till everyone's | |
2993 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2994 | if (locks_in_grace()) |
7b190fec | 2995 | goto out; |
dad1c067 | 2996 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2997 | goto out; |
2998 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2999 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
3000 | else | |
3001 | flag = NFS4_OPEN_DELEGATE_READ; | |
3002 | break; | |
3003 | default: | |
3004 | goto out; | |
3005 | } | |
1da177e4 | 3006 | |
fe0750e5 | 3007 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
3008 | if (dp == NULL) |
3009 | goto out_no_deleg; | |
acfdf5c3 | 3010 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 3011 | if (status) |
dd239cc0 | 3012 | goto out_free; |
1da177e4 | 3013 | |
d5477a8d | 3014 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3015 | |
8c10cbdb | 3016 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3017 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
3018 | out: |
3019 | open->op_delegate_type = flag; | |
d24433cd BH |
3020 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
3021 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
3022 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
3023 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
3024 | ||
4aa8913c BH |
3025 | /* 4.1 client asking for a delegation? */ |
3026 | if (open->op_deleg_want) | |
3027 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 3028 | } |
dd239cc0 BF |
3029 | return; |
3030 | out_free: | |
acfdf5c3 | 3031 | nfs4_put_delegation(dp); |
dd239cc0 BF |
3032 | out_no_deleg: |
3033 | flag = NFS4_OPEN_DELEGATE_NONE; | |
3034 | goto out; | |
1da177e4 LT |
3035 | } |
3036 | ||
e27f49c3 BH |
3037 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3038 | struct nfs4_delegation *dp) | |
3039 | { | |
3040 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3041 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3042 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3043 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3044 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3045 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3046 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3047 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3048 | } | |
3049 | /* Otherwise the client must be confused wanting a delegation | |
3050 | * it already has, therefore we don't return | |
3051 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3052 | */ | |
3053 | } | |
3054 | ||
1da177e4 LT |
3055 | /* |
3056 | * called with nfs4_lock_state() held. | |
3057 | */ | |
b37ad28b | 3058 | __be32 |
1da177e4 LT |
3059 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3060 | { | |
6668958f | 3061 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3062 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3063 | struct nfs4_file *fp = NULL; |
3064 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3065 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3066 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3067 | __be32 status; |
1da177e4 | 3068 | |
1da177e4 LT |
3069 | /* |
3070 | * Lookup file; if found, lookup stateid and check open request, | |
3071 | * and check for delegations in the process of being recalled. | |
3072 | * If not found, create the nfs4_file struct | |
3073 | */ | |
3074 | fp = find_file(ino); | |
3075 | if (fp) { | |
3076 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3077 | goto out; | |
38c2f4b1 | 3078 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3079 | if (status) |
3080 | goto out; | |
1da177e4 | 3081 | } else { |
c44c5eeb | 3082 | status = nfserr_bad_stateid; |
8b289b2c | 3083 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3084 | goto out; |
3e772463 | 3085 | status = nfserr_jukebox; |
32513b40 BF |
3086 | fp = open->op_file; |
3087 | open->op_file = NULL; | |
3088 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3089 | } |
3090 | ||
3091 | /* | |
3092 | * OPEN the file, or upgrade an existing OPEN. | |
3093 | * If truncate fails, the OPEN fails. | |
3094 | */ | |
3095 | if (stp) { | |
3096 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3097 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3098 | if (status) |
3099 | goto out; | |
3100 | } else { | |
4cdc951b | 3101 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 3102 | if (status) |
1da177e4 | 3103 | goto out; |
4cdc951b BF |
3104 | stp = open->op_stp; |
3105 | open->op_stp = NULL; | |
996e0938 | 3106 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
3107 | status = nfsd4_truncate(rqstp, current_fh, open); |
3108 | if (status) { | |
2283963f | 3109 | release_open_stateid(stp); |
1da177e4 LT |
3110 | goto out; |
3111 | } | |
3112 | } | |
dcef0413 BF |
3113 | update_stateid(&stp->st_stid.sc_stateid); |
3114 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3115 | |
d24433cd | 3116 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3117 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3118 | |
d24433cd BH |
3119 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3120 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3121 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3122 | goto nodeleg; | |
3123 | } | |
3124 | } | |
3125 | ||
1da177e4 LT |
3126 | /* |
3127 | * Attempt to hand out a delegation. No error return, because the | |
3128 | * OPEN succeeds even if we fail. | |
3129 | */ | |
3130 | nfs4_open_delegation(current_fh, open, stp); | |
d24433cd | 3131 | nodeleg: |
1da177e4 LT |
3132 | status = nfs_ok; |
3133 | ||
8c10cbdb | 3134 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3135 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3136 | out: |
d24433cd BH |
3137 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3138 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3139 | open->op_deleg_want) |
3140 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3141 | |
13cd2184 N |
3142 | if (fp) |
3143 | put_nfs4_file(fp); | |
37515177 | 3144 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3145 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3146 | /* |
3147 | * To finish the open response, we just need to set the rflags. | |
3148 | */ | |
3149 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3150 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3151 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3152 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3153 | ||
3154 | return status; | |
3155 | } | |
3156 | ||
d29b20cd BF |
3157 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3158 | { | |
3159 | if (open->op_openowner) { | |
3160 | struct nfs4_openowner *oo = open->op_openowner; | |
3161 | ||
3162 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3163 | list_del_init(&oo->oo_close_lru); | |
3164 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3165 | if (status) { | |
3166 | release_openowner(oo); | |
3167 | open->op_openowner = NULL; | |
3168 | } else | |
3169 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3170 | } | |
3171 | } | |
32513b40 BF |
3172 | if (open->op_file) |
3173 | nfsd4_free_file(open->op_file); | |
4cdc951b BF |
3174 | if (open->op_stp) |
3175 | nfs4_free_stateid(open->op_stp); | |
d29b20cd BF |
3176 | } |
3177 | ||
b37ad28b | 3178 | __be32 |
b591480b BF |
3179 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3180 | clientid_t *clid) | |
1da177e4 LT |
3181 | { |
3182 | struct nfs4_client *clp; | |
b37ad28b | 3183 | __be32 status; |
1da177e4 LT |
3184 | |
3185 | nfs4_lock_state(); | |
3186 | dprintk("process_renew(%08x/%08x): starting\n", | |
3187 | clid->cl_boot, clid->cl_id); | |
3188 | status = nfserr_stale_clientid; | |
3189 | if (STALE_CLIENTID(clid)) | |
3190 | goto out; | |
3191 | clp = find_confirmed_client(clid); | |
3192 | status = nfserr_expired; | |
3193 | if (clp == NULL) { | |
3194 | /* We assume the client took too long to RENEW. */ | |
3195 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3196 | goto out; | |
3197 | } | |
1da177e4 | 3198 | status = nfserr_cb_path_down; |
ea1da636 | 3199 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3200 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3201 | goto out; |
3202 | status = nfs_ok; | |
3203 | out: | |
3204 | nfs4_unlock_state(); | |
3205 | return status; | |
3206 | } | |
3207 | ||
c47d832b | 3208 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3209 | }; |
3210 | ||
33dcc481 JL |
3211 | static bool grace_ended; |
3212 | ||
a76b4319 | 3213 | static void |
af558e33 | 3214 | nfsd4_end_grace(void) |
a76b4319 | 3215 | { |
33dcc481 JL |
3216 | /* do nothing if grace period already ended */ |
3217 | if (grace_ended) | |
3218 | return; | |
3219 | ||
a76b4319 | 3220 | dprintk("NFSD: end of grace period\n"); |
33dcc481 | 3221 | grace_ended = true; |
2a4317c5 | 3222 | nfsd4_record_grace_done(&init_net, boot_time); |
af558e33 | 3223 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3224 | /* |
3225 | * Now that every NFSv4 client has had the chance to recover and | |
3226 | * to see the (possibly new, possibly shorter) lease time, we | |
3227 | * can safely set the next grace time to the current lease time: | |
3228 | */ | |
3229 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3230 | } |
3231 | ||
fd39ca9a | 3232 | static time_t |
1da177e4 LT |
3233 | nfs4_laundromat(void) |
3234 | { | |
3235 | struct nfs4_client *clp; | |
fe0750e5 | 3236 | struct nfs4_openowner *oo; |
1da177e4 LT |
3237 | struct nfs4_delegation *dp; |
3238 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3239 | time_t cutoff = get_seconds() - nfsd4_lease; |
3240 | time_t t, clientid_val = nfsd4_lease; | |
3241 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3242 | |
3243 | nfs4_lock_state(); | |
3244 | ||
3245 | dprintk("NFSD: laundromat service - starting\n"); | |
33dcc481 | 3246 | nfsd4_end_grace(); |
36acb66b BH |
3247 | INIT_LIST_HEAD(&reaplist); |
3248 | spin_lock(&client_lock); | |
1da177e4 LT |
3249 | list_for_each_safe(pos, next, &client_lru) { |
3250 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3251 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3252 | t = clp->cl_time - cutoff; | |
3253 | if (clientid_val > t) | |
3254 | clientid_val = t; | |
3255 | break; | |
3256 | } | |
d7682988 BH |
3257 | if (atomic_read(&clp->cl_refcount)) { |
3258 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3259 | clp->cl_clientid.cl_id); | |
3260 | continue; | |
3261 | } | |
3262 | unhash_client_locked(clp); | |
3263 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3264 | } |
3265 | spin_unlock(&client_lock); | |
3266 | list_for_each_safe(pos, next, &reaplist) { | |
3267 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3268 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3269 | clp->cl_clientid.cl_id); | |
2a4317c5 | 3270 | nfsd4_client_record_remove(clp); |
1da177e4 LT |
3271 | expire_client(clp); |
3272 | } | |
1da177e4 LT |
3273 | spin_lock(&recall_lock); |
3274 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3275 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3276 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3277 | u = dp->dl_time - cutoff; | |
3278 | if (test_val > u) | |
3279 | test_val = u; | |
3280 | break; | |
3281 | } | |
1da177e4 LT |
3282 | list_move(&dp->dl_recall_lru, &reaplist); |
3283 | } | |
3284 | spin_unlock(&recall_lock); | |
3285 | list_for_each_safe(pos, next, &reaplist) { | |
3286 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3287 | unhash_delegation(dp); |
3288 | } | |
cf07d2ea | 3289 | test_val = nfsd4_lease; |
1da177e4 | 3290 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3291 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3292 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3293 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3294 | if (test_val > u) |
3295 | test_val = u; | |
3296 | break; | |
3297 | } | |
fe0750e5 | 3298 | release_openowner(oo); |
1da177e4 LT |
3299 | } |
3300 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3301 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3302 | nfs4_unlock_state(); | |
3303 | return clientid_val; | |
3304 | } | |
3305 | ||
a254b246 HH |
3306 | static struct workqueue_struct *laundry_wq; |
3307 | static void laundromat_main(struct work_struct *); | |
3308 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3309 | ||
3310 | static void | |
c4028958 | 3311 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3312 | { |
3313 | time_t t; | |
3314 | ||
3315 | t = nfs4_laundromat(); | |
3316 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3317 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3318 | } |
3319 | ||
f7a4d872 | 3320 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3321 | { |
f7a4d872 BF |
3322 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3323 | return nfserr_bad_stateid; | |
3324 | return nfs_ok; | |
1da177e4 LT |
3325 | } |
3326 | ||
3327 | static int | |
3328 | STALE_STATEID(stateid_t *stateid) | |
3329 | { | |
d3b313a4 | 3330 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3331 | return 0; |
3332 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3333 | STATEID_VAL(stateid)); |
e4e83ea4 | 3334 | return 1; |
1da177e4 LT |
3335 | } |
3336 | ||
3337 | static inline int | |
82c5ff1b | 3338 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3339 | { |
82c5ff1b JL |
3340 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3341 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3342 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3343 | } |
3344 | ||
3345 | static inline int | |
82c5ff1b | 3346 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3347 | { |
82c5ff1b JL |
3348 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3349 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3350 | } |
3351 | ||
3352 | static | |
dcef0413 | 3353 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3354 | { |
b37ad28b | 3355 | __be32 status = nfserr_openmode; |
1da177e4 | 3356 | |
02921914 BF |
3357 | /* For lock stateid's, we test the parent open, not the lock: */ |
3358 | if (stp->st_openstp) | |
3359 | stp = stp->st_openstp; | |
82c5ff1b | 3360 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3361 | goto out; |
82c5ff1b | 3362 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3363 | goto out; |
3364 | status = nfs_ok; | |
3365 | out: | |
3366 | return status; | |
3367 | } | |
3368 | ||
b37ad28b | 3369 | static inline __be32 |
1da177e4 LT |
3370 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3371 | { | |
203a8c8e | 3372 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3373 | return nfs_ok; |
af558e33 | 3374 | else if (locks_in_grace()) { |
25985edc | 3375 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3376 | * conflicting state; so we must wait out the grace period. */ |
3377 | return nfserr_grace; | |
3378 | } else if (flags & WR_STATE) | |
3379 | return nfs4_share_conflict(current_fh, | |
3380 | NFS4_SHARE_DENY_WRITE); | |
3381 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3382 | return nfs4_share_conflict(current_fh, | |
3383 | NFS4_SHARE_DENY_READ); | |
3384 | } | |
3385 | ||
3386 | /* | |
3387 | * Allow READ/WRITE during grace period on recovered state only for files | |
3388 | * that are not able to provide mandatory locking. | |
3389 | */ | |
3390 | static inline int | |
18f82731 | 3391 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3392 | { |
203a8c8e | 3393 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3394 | } |
3395 | ||
81b82965 BF |
3396 | /* Returns true iff a is later than b: */ |
3397 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3398 | { | |
3399 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3400 | } | |
3401 | ||
57b7b43b | 3402 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3403 | { |
6668958f AA |
3404 | /* |
3405 | * When sessions are used the stateid generation number is ignored | |
3406 | * when it is zero. | |
3407 | */ | |
28dde241 | 3408 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3409 | return nfs_ok; |
3410 | ||
3411 | if (in->si_generation == ref->si_generation) | |
3412 | return nfs_ok; | |
6668958f | 3413 | |
0836f587 | 3414 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3415 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3416 | return nfserr_bad_stateid; |
3417 | /* | |
81b82965 BF |
3418 | * However, we could see a stateid from the past, even from a |
3419 | * non-buggy client. For example, if the client sends a lock | |
3420 | * while some IO is outstanding, the lock may bump si_generation | |
3421 | * while the IO is still in flight. The client could avoid that | |
3422 | * situation by waiting for responses on all the IO requests, | |
3423 | * but better performance may result in retrying IO that | |
3424 | * receives an old_stateid error if requests are rarely | |
3425 | * reordered in flight: | |
0836f587 | 3426 | */ |
81b82965 | 3427 | return nfserr_old_stateid; |
0836f587 BF |
3428 | } |
3429 | ||
38c2f4b1 | 3430 | __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3431 | { |
97b7e3b6 BF |
3432 | struct nfs4_stid *s; |
3433 | struct nfs4_ol_stateid *ols; | |
3434 | __be32 status; | |
17456804 BS |
3435 | |
3436 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3437 | return nfserr_stale_stateid; |
17456804 | 3438 | |
38c2f4b1 | 3439 | s = find_stateid(cl, stateid); |
97b7e3b6 BF |
3440 | if (!s) |
3441 | return nfserr_stale_stateid; | |
36279ac1 | 3442 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3443 | if (status) |
97b7e3b6 BF |
3444 | return status; |
3445 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3446 | return nfs_ok; | |
3447 | ols = openlockstateid(s); | |
3448 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3449 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3450 | return nfserr_bad_stateid; |
3451 | return nfs_ok; | |
17456804 BS |
3452 | } |
3453 | ||
38c2f4b1 BF |
3454 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) |
3455 | { | |
3456 | struct nfs4_client *cl; | |
3457 | ||
3458 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3459 | return nfserr_bad_stateid; | |
3460 | if (STALE_STATEID(stateid)) | |
3461 | return nfserr_stale_stateid; | |
3462 | cl = find_confirmed_client(&stateid->si_opaque.so_clid); | |
3463 | if (!cl) | |
3464 | return nfserr_expired; | |
3465 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3466 | if (!*s) | |
3467 | return nfserr_bad_stateid; | |
3468 | return nfs_ok; | |
3469 | ||
3470 | } | |
3471 | ||
1da177e4 LT |
3472 | /* |
3473 | * Checks for stateid operations | |
3474 | */ | |
b37ad28b | 3475 | __be32 |
dd453dfd BH |
3476 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3477 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3478 | { |
69064a27 | 3479 | struct nfs4_stid *s; |
dcef0413 | 3480 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3481 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3482 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3483 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3484 | __be32 status; |
1da177e4 | 3485 | |
1da177e4 LT |
3486 | if (filpp) |
3487 | *filpp = NULL; | |
3488 | ||
18f82731 | 3489 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3490 | return nfserr_grace; |
3491 | ||
3492 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3493 | return check_special_stateids(current_fh, stateid, flags); | |
3494 | ||
38c2f4b1 BF |
3495 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); |
3496 | if (status) | |
3497 | return status; | |
69064a27 BF |
3498 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3499 | if (status) | |
3500 | goto out; | |
f7a4d872 BF |
3501 | switch (s->sc_type) { |
3502 | case NFS4_DELEG_STID: | |
69064a27 | 3503 | dp = delegstateid(s); |
dc9bf700 BF |
3504 | status = nfs4_check_delegmode(dp, flags); |
3505 | if (status) | |
3506 | goto out; | |
43b0178e | 3507 | if (filpp) { |
acfdf5c3 | 3508 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3509 | BUG_ON(!*filpp); |
3510 | } | |
f7a4d872 BF |
3511 | break; |
3512 | case NFS4_OPEN_STID: | |
3513 | case NFS4_LOCK_STID: | |
69064a27 | 3514 | stp = openlockstateid(s); |
f7a4d872 BF |
3515 | status = nfs4_check_fh(current_fh, stp); |
3516 | if (status) | |
1da177e4 | 3517 | goto out; |
fe0750e5 | 3518 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3519 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3520 | goto out; |
a4455be0 BF |
3521 | status = nfs4_check_openmode(stp, flags); |
3522 | if (status) | |
1da177e4 | 3523 | goto out; |
f9d7562f BF |
3524 | if (filpp) { |
3525 | if (flags & RD_STATE) | |
3526 | *filpp = find_readable_file(stp->st_file); | |
3527 | else | |
3528 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3529 | } |
f7a4d872 BF |
3530 | break; |
3531 | default: | |
3532 | return nfserr_bad_stateid; | |
1da177e4 LT |
3533 | } |
3534 | status = nfs_ok; | |
3535 | out: | |
3536 | return status; | |
3537 | } | |
3538 | ||
e1ca12df | 3539 | static __be32 |
dcef0413 | 3540 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3541 | { |
fe0750e5 | 3542 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3543 | return nfserr_locks_held; |
3544 | release_lock_stateid(stp); | |
3545 | return nfs_ok; | |
3546 | } | |
3547 | ||
17456804 BS |
3548 | /* |
3549 | * Test if the stateid is valid | |
3550 | */ | |
3551 | __be32 | |
3552 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3553 | struct nfsd4_test_stateid *test_stateid) | |
3554 | { | |
03cfb420 BS |
3555 | struct nfsd4_test_stateid_id *stateid; |
3556 | struct nfs4_client *cl = cstate->session->se_client; | |
3557 | ||
3558 | nfs4_lock_state(); | |
3559 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
3560 | stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); | |
3561 | nfs4_unlock_state(); | |
3562 | ||
17456804 BS |
3563 | return nfs_ok; |
3564 | } | |
3565 | ||
e1ca12df BS |
3566 | __be32 |
3567 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3568 | struct nfsd4_free_stateid *free_stateid) | |
3569 | { | |
3570 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3571 | struct nfs4_stid *s; |
38c2f4b1 | 3572 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3573 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3574 | |
3575 | nfs4_lock_state(); | |
38c2f4b1 | 3576 | s = find_stateid(cl, stateid); |
2da1cec7 | 3577 | if (!s) |
81b82965 | 3578 | goto out; |
2da1cec7 BF |
3579 | switch (s->sc_type) { |
3580 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3581 | ret = nfserr_locks_held; |
3582 | goto out; | |
2da1cec7 BF |
3583 | case NFS4_OPEN_STID: |
3584 | case NFS4_LOCK_STID: | |
3585 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3586 | if (ret) | |
3587 | goto out; | |
3588 | if (s->sc_type == NFS4_LOCK_STID) | |
3589 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3590 | else | |
3591 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3592 | break; |
3593 | default: | |
3594 | ret = nfserr_bad_stateid; | |
e1ca12df | 3595 | } |
e1ca12df BS |
3596 | out: |
3597 | nfs4_unlock_state(); | |
3598 | return ret; | |
3599 | } | |
3600 | ||
4c4cd222 N |
3601 | static inline int |
3602 | setlkflg (int type) | |
3603 | { | |
3604 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3605 | RD_STATE : WR_STATE; | |
3606 | } | |
1da177e4 | 3607 | |
dcef0413 | 3608 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3609 | { |
3610 | struct svc_fh *current_fh = &cstate->current_fh; | |
3611 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3612 | __be32 status; | |
3613 | ||
c0a5d93e BF |
3614 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3615 | if (status) | |
3616 | return status; | |
f7a4d872 BF |
3617 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3618 | /* | |
3619 | * "Closed" stateid's exist *only* to return | |
3620 | * nfserr_replay_me from the previous step. | |
3621 | */ | |
3622 | return nfserr_bad_stateid; | |
3623 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3624 | if (status) | |
3625 | return status; | |
3626 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3627 | } |
3628 | ||
1da177e4 LT |
3629 | /* |
3630 | * Checks for sequence id mutating operations. | |
3631 | */ | |
b37ad28b | 3632 | static __be32 |
dd453dfd | 3633 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3634 | stateid_t *stateid, char typemask, |
dcef0413 | 3635 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3636 | { |
0836f587 | 3637 | __be32 status; |
38c2f4b1 | 3638 | struct nfs4_stid *s; |
1da177e4 | 3639 | |
8c10cbdb BH |
3640 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3641 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3642 | |
1da177e4 | 3643 | *stpp = NULL; |
38c2f4b1 | 3644 | status = nfsd4_lookup_stateid(stateid, typemask, &s); |
c0a5d93e BF |
3645 | if (status) |
3646 | return status; | |
38c2f4b1 | 3647 | *stpp = openlockstateid(s); |
c0a5d93e | 3648 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3649 | |
c0a5d93e BF |
3650 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3651 | } | |
39325bd0 | 3652 | |
dcef0413 | 3653 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3654 | { |
3655 | __be32 status; | |
3656 | struct nfs4_openowner *oo; | |
1da177e4 | 3657 | |
c0a5d93e | 3658 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3659 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3660 | if (status) |
3661 | return status; | |
c0a5d93e | 3662 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3663 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3664 | return nfserr_bad_stateid; |
3a4f98bb | 3665 | return nfs_ok; |
1da177e4 LT |
3666 | } |
3667 | ||
b37ad28b | 3668 | __be32 |
ca364317 | 3669 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3670 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3671 | { |
b37ad28b | 3672 | __be32 status; |
fe0750e5 | 3673 | struct nfs4_openowner *oo; |
dcef0413 | 3674 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3675 | |
3676 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3677 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3678 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3679 | |
ca364317 | 3680 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3681 | if (status) |
3682 | return status; | |
1da177e4 LT |
3683 | |
3684 | nfs4_lock_state(); | |
3685 | ||
9072d5c6 | 3686 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3687 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3688 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3689 | if (status) |
68b66e82 | 3690 | goto out; |
fe0750e5 | 3691 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3692 | status = nfserr_bad_stateid; |
dad1c067 | 3693 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3694 | goto out; |
dad1c067 | 3695 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3696 | update_stateid(&stp->st_stid.sc_stateid); |
3697 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3698 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3699 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3700 | |
2a4317c5 | 3701 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3702 | status = nfs_ok; |
1da177e4 | 3703 | out: |
5ec094c1 BF |
3704 | if (!cstate->replay_owner) |
3705 | nfs4_unlock_state(); | |
1da177e4 LT |
3706 | return status; |
3707 | } | |
3708 | ||
6409a5a6 | 3709 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3710 | { |
82c5ff1b | 3711 | if (!test_access(access, stp)) |
6409a5a6 BF |
3712 | return; |
3713 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3714 | clear_access(access, stp); |
6409a5a6 | 3715 | } |
f197c271 | 3716 | |
6409a5a6 BF |
3717 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3718 | { | |
3719 | switch (to_access) { | |
3720 | case NFS4_SHARE_ACCESS_READ: | |
3721 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3722 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3723 | break; | |
3724 | case NFS4_SHARE_ACCESS_WRITE: | |
3725 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3726 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3727 | break; | |
3728 | case NFS4_SHARE_ACCESS_BOTH: | |
3729 | break; | |
3730 | default: | |
3731 | BUG(); | |
1da177e4 LT |
3732 | } |
3733 | } | |
3734 | ||
3735 | static void | |
ce0fc43c | 3736 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3737 | { |
3738 | int i; | |
3739 | for (i = 0; i < 4; i++) { | |
3740 | if ((i & deny) != i) | |
ce0fc43c | 3741 | clear_deny(i, stp); |
1da177e4 LT |
3742 | } |
3743 | } | |
3744 | ||
b37ad28b | 3745 | __be32 |
ca364317 BF |
3746 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3747 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3748 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3749 | { |
b37ad28b | 3750 | __be32 status; |
dcef0413 | 3751 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3752 | |
3753 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3754 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3755 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3756 | |
c30e92df | 3757 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3758 | if (od->od_deleg_want) |
3759 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3760 | od->od_deleg_want); | |
1da177e4 LT |
3761 | |
3762 | nfs4_lock_state(); | |
c0a5d93e BF |
3763 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3764 | &od->od_stateid, &stp); | |
9072d5c6 | 3765 | if (status) |
1da177e4 | 3766 | goto out; |
1da177e4 | 3767 | status = nfserr_inval; |
82c5ff1b JL |
3768 | if (!test_access(od->od_share_access, stp)) { |
3769 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3770 | stp->st_access_bmap, od->od_share_access); |
3771 | goto out; | |
3772 | } | |
ce0fc43c | 3773 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3774 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3775 | stp->st_deny_bmap, od->od_share_deny); | |
3776 | goto out; | |
3777 | } | |
6409a5a6 | 3778 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3779 | |
ce0fc43c | 3780 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3781 | |
dcef0413 BF |
3782 | update_stateid(&stp->st_stid.sc_stateid); |
3783 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3784 | status = nfs_ok; |
3785 | out: | |
5ec094c1 BF |
3786 | if (!cstate->replay_owner) |
3787 | nfs4_unlock_state(); | |
1da177e4 LT |
3788 | return status; |
3789 | } | |
3790 | ||
38c387b5 BF |
3791 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3792 | { | |
3793 | struct nfs4_openowner *oo; | |
3794 | struct nfs4_ol_stateid *s; | |
3795 | ||
3796 | if (!so->so_is_open_owner) | |
3797 | return; | |
3798 | oo = openowner(so); | |
3799 | s = oo->oo_last_closed_stid; | |
3800 | if (!s) | |
3801 | return; | |
3802 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3803 | /* Release the last_closed_stid on the next seqid bump: */ | |
3804 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3805 | return; | |
3806 | } | |
3807 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3808 | release_last_closed_stateid(oo); |
3809 | } | |
3810 | ||
3811 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3812 | { | |
3813 | unhash_open_stateid(s); | |
3814 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3815 | } |
3816 | ||
1da177e4 LT |
3817 | /* |
3818 | * nfs4_unlock_state() called after encode | |
3819 | */ | |
b37ad28b | 3820 | __be32 |
ca364317 | 3821 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3822 | struct nfsd4_close *close) |
1da177e4 | 3823 | { |
b37ad28b | 3824 | __be32 status; |
fe0750e5 | 3825 | struct nfs4_openowner *oo; |
dcef0413 | 3826 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3827 | |
3828 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3829 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3830 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3831 | |
3832 | nfs4_lock_state(); | |
f7a4d872 BF |
3833 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3834 | &close->cl_stateid, | |
3835 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3836 | &stp); | |
9072d5c6 | 3837 | if (status) |
1da177e4 | 3838 | goto out; |
fe0750e5 | 3839 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3840 | status = nfs_ok; |
dcef0413 BF |
3841 | update_stateid(&stp->st_stid.sc_stateid); |
3842 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3843 | |
f7a4d872 | 3844 | nfsd4_close_open_stateid(stp); |
38c387b5 | 3845 | oo->oo_last_closed_stid = stp; |
04ef5954 BF |
3846 | |
3847 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3848 | * released by the laundromat service after the lease period | |
3849 | * to enable us to handle CLOSE replay | |
3850 | */ | |
fe0750e5 BF |
3851 | if (list_empty(&oo->oo_owner.so_stateids)) |
3852 | move_to_close_lru(oo); | |
1da177e4 | 3853 | out: |
5ec094c1 BF |
3854 | if (!cstate->replay_owner) |
3855 | nfs4_unlock_state(); | |
1da177e4 LT |
3856 | return status; |
3857 | } | |
3858 | ||
b37ad28b | 3859 | __be32 |
ca364317 BF |
3860 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3861 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3862 | { |
203a8c8e BF |
3863 | struct nfs4_delegation *dp; |
3864 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3865 | struct nfs4_stid *s; |
203a8c8e | 3866 | struct inode *inode; |
b37ad28b | 3867 | __be32 status; |
1da177e4 | 3868 | |
ca364317 | 3869 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3870 | return status; |
3871 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3872 | |
3873 | nfs4_lock_state(); | |
38c2f4b1 BF |
3874 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); |
3875 | if (status) | |
203a8c8e | 3876 | goto out; |
38c2f4b1 | 3877 | dp = delegstateid(s); |
d5477a8d | 3878 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3879 | if (status) |
3880 | goto out; | |
203a8c8e BF |
3881 | |
3882 | unhash_delegation(dp); | |
1da177e4 | 3883 | out: |
203a8c8e BF |
3884 | nfs4_unlock_state(); |
3885 | ||
1da177e4 LT |
3886 | return status; |
3887 | } | |
3888 | ||
3889 | ||
1da177e4 | 3890 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3891 | |
009673b4 BF |
3892 | #define LOCKOWNER_INO_HASH_BITS 8 |
3893 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3894 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3895 | |
87df4de8 BH |
3896 | static inline u64 |
3897 | end_offset(u64 start, u64 len) | |
3898 | { | |
3899 | u64 end; | |
3900 | ||
3901 | end = start + len; | |
3902 | return end >= start ? end: NFS4_MAX_UINT64; | |
3903 | } | |
3904 | ||
3905 | /* last octet in a range */ | |
3906 | static inline u64 | |
3907 | last_byte_offset(u64 start, u64 len) | |
3908 | { | |
3909 | u64 end; | |
3910 | ||
3911 | BUG_ON(!len); | |
3912 | end = start + len; | |
3913 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3914 | } | |
3915 | ||
009673b4 | 3916 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3917 | { |
3918 | return (file_hashval(inode) + cl_id | |
3919 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3920 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3921 | } |
3922 | ||
009673b4 | 3923 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3924 | |
1da177e4 LT |
3925 | /* |
3926 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3927 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3928 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3929 | * locking, this prevents us from being completely protocol-compliant. The | |
3930 | * real solution to this problem is to start using unsigned file offsets in | |
3931 | * the VFS, but this is a very deep change! | |
3932 | */ | |
3933 | static inline void | |
3934 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3935 | { | |
3936 | if (lock->fl_start < 0) | |
3937 | lock->fl_start = OFFSET_MAX; | |
3938 | if (lock->fl_end < 0) | |
3939 | lock->fl_end = OFFSET_MAX; | |
3940 | } | |
3941 | ||
d5b9026a N |
3942 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3943 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3944 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3945 | }; |
1da177e4 LT |
3946 | |
3947 | static inline void | |
3948 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3949 | { | |
fe0750e5 | 3950 | struct nfs4_lockowner *lo; |
1da177e4 | 3951 | |
d5b9026a | 3952 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3953 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3954 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3955 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3956 | if (!deny->ld_owner.data) |
3957 | /* We just don't care that much */ | |
3958 | goto nevermind; | |
fe0750e5 BF |
3959 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3960 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3961 | } else { |
7c13f344 BF |
3962 | nevermind: |
3963 | deny->ld_owner.len = 0; | |
3964 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3965 | deny->ld_clientid.cl_boot = 0; |
3966 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3967 | } |
3968 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3969 | deny->ld_length = NFS4_MAX_UINT64; |
3970 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3971 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3972 | deny->ld_type = NFS4_READ_LT; | |
3973 | if (fl->fl_type != F_RDLCK) | |
3974 | deny->ld_type = NFS4_WRITE_LT; | |
3975 | } | |
3976 | ||
b93d87c1 BF |
3977 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3978 | { | |
3979 | struct nfs4_ol_stateid *lst; | |
3980 | ||
3981 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3982 | return false; | |
3983 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3984 | struct nfs4_ol_stateid, st_perstateowner); | |
3985 | return lst->st_file->fi_inode == inode; | |
3986 | } | |
3987 | ||
fe0750e5 BF |
3988 | static struct nfs4_lockowner * |
3989 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3990 | struct xdr_netobj *owner) |
3991 | { | |
009673b4 | 3992 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3993 | struct nfs4_lockowner *lo; |
1da177e4 | 3994 | |
009673b4 | 3995 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3996 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3997 | return lo; | |
1da177e4 LT |
3998 | } |
3999 | return NULL; | |
4000 | } | |
4001 | ||
dcef0413 | 4002 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 4003 | { |
009673b4 BF |
4004 | struct inode *inode = open_stp->st_file->fi_inode; |
4005 | unsigned int inohash = lockowner_ino_hashval(inode, | |
4006 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
4007 | ||
16bfdaaf | 4008 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 4009 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 4010 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
4011 | } |
4012 | ||
1da177e4 LT |
4013 | /* |
4014 | * Alloc a lock owner structure. | |
4015 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4016 | * occurred. |
1da177e4 | 4017 | * |
16bfdaaf | 4018 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4019 | */ |
4020 | ||
fe0750e5 | 4021 | static struct nfs4_lockowner * |
dcef0413 | 4022 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4023 | struct nfs4_lockowner *lo; |
1da177e4 | 4024 | |
fe0750e5 BF |
4025 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4026 | if (!lo) | |
1da177e4 | 4027 | return NULL; |
fe0750e5 BF |
4028 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4029 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4030 | /* It is the openowner seqid that will be incremented in encode in the |
4031 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4032 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4033 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4034 | return lo; | |
1da177e4 LT |
4035 | } |
4036 | ||
dcef0413 BF |
4037 | static struct nfs4_ol_stateid * |
4038 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4039 | { |
dcef0413 | 4040 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4041 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4042 | |
996e0938 | 4043 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4044 | if (stp == NULL) |
6136d2b4 | 4045 | return NULL; |
996e0938 | 4046 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 4047 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4048 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4049 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4050 | get_nfs4_file(fp); |
1da177e4 | 4051 | stp->st_file = fp; |
0997b173 | 4052 | stp->st_access_bmap = 0; |
1da177e4 | 4053 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4054 | stp->st_openstp = open_stp; |
1da177e4 LT |
4055 | return stp; |
4056 | } | |
4057 | ||
fd39ca9a | 4058 | static int |
1da177e4 LT |
4059 | check_lock_length(u64 offset, u64 length) |
4060 | { | |
87df4de8 | 4061 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4062 | LOFF_OVERFLOW(offset, length))); |
4063 | } | |
4064 | ||
dcef0413 | 4065 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4066 | { |
4067 | struct nfs4_file *fp = lock_stp->st_file; | |
4068 | int oflag = nfs4_access_to_omode(access); | |
4069 | ||
82c5ff1b | 4070 | if (test_access(access, lock_stp)) |
0997b173 BF |
4071 | return; |
4072 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4073 | set_access(access, lock_stp); |
0997b173 BF |
4074 | } |
4075 | ||
2355c596 | 4076 | 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 |
4077 | { |
4078 | struct nfs4_file *fi = ost->st_file; | |
4079 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4080 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4081 | struct nfs4_lockowner *lo; | |
4082 | unsigned int strhashval; | |
4083 | ||
4084 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
4085 | if (lo) { | |
4086 | if (!cstate->minorversion) | |
4087 | return nfserr_bad_seqid; | |
4088 | /* XXX: a lockowner always has exactly one stateid: */ | |
4089 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4090 | struct nfs4_ol_stateid, st_perstateowner); | |
4091 | return nfs_ok; | |
4092 | } | |
16bfdaaf | 4093 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4094 | &lock->v.new.owner); |
4095 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4096 | if (lo == NULL) | |
4097 | return nfserr_jukebox; | |
4098 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4099 | if (*lst == NULL) { | |
4100 | release_lockowner(lo); | |
4101 | return nfserr_jukebox; | |
4102 | } | |
4103 | *new = true; | |
4104 | return nfs_ok; | |
4105 | } | |
4106 | ||
1da177e4 LT |
4107 | /* |
4108 | * LOCK operation | |
4109 | */ | |
b37ad28b | 4110 | __be32 |
ca364317 | 4111 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4112 | struct nfsd4_lock *lock) |
1da177e4 | 4113 | { |
fe0750e5 BF |
4114 | struct nfs4_openowner *open_sop = NULL; |
4115 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4116 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4117 | struct file *filp = NULL; |
1da177e4 | 4118 | struct file_lock file_lock; |
8dc7c311 | 4119 | struct file_lock conflock; |
b37ad28b | 4120 | __be32 status = 0; |
64a284d0 | 4121 | bool new_state = false; |
b34f27aa | 4122 | int lkflg; |
b8dd7b9a | 4123 | int err; |
1da177e4 LT |
4124 | |
4125 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4126 | (long long) lock->lk_offset, | |
4127 | (long long) lock->lk_length); | |
4128 | ||
1da177e4 LT |
4129 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4130 | return nfserr_inval; | |
4131 | ||
ca364317 | 4132 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4133 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4134 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4135 | return status; | |
4136 | } | |
4137 | ||
1da177e4 LT |
4138 | nfs4_lock_state(); |
4139 | ||
4140 | if (lock->lk_is_new) { | |
893f8770 N |
4141 | /* |
4142 | * Client indicates that this is a new lockowner. | |
4143 | * Use open owner and open stateid to create lock owner and | |
4144 | * lock stateid. | |
4145 | */ | |
dcef0413 | 4146 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4147 | |
4148 | if (nfsd4_has_session(cstate)) | |
4149 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4150 | memcpy(&lock->v.new.clientid, | |
4151 | &cstate->session->se_client->cl_clientid, | |
4152 | sizeof(clientid_t)); | |
4153 | ||
1da177e4 | 4154 | status = nfserr_stale_clientid; |
684e5638 | 4155 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 4156 | goto out; |
1da177e4 | 4157 | |
1da177e4 | 4158 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4159 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4160 | lock->lk_new_open_seqid, |
4161 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4162 | &open_stp); |
37515177 | 4163 | if (status) |
1da177e4 | 4164 | goto out; |
fe0750e5 | 4165 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4166 | status = nfserr_bad_stateid; |
684e5638 | 4167 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4168 | &lock->v.new.clientid)) |
4169 | goto out; | |
64a284d0 BF |
4170 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4171 | &lock_stp, &new_state); | |
4172 | if (status) | |
1da177e4 | 4173 | goto out; |
1da177e4 LT |
4174 | } else { |
4175 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 4176 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4177 | lock->lk_old_lock_seqid, |
4178 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4179 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
4180 | if (status) |
4181 | goto out; | |
4182 | } | |
64a284d0 | 4183 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4184 | |
b34f27aa BF |
4185 | lkflg = setlkflg(lock->lk_type); |
4186 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4187 | if (status) | |
4188 | goto out; | |
4189 | ||
0dd395dc | 4190 | status = nfserr_grace; |
af558e33 | 4191 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4192 | goto out; |
4193 | status = nfserr_no_grace; | |
af558e33 | 4194 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4195 | goto out; |
4196 | ||
1da177e4 LT |
4197 | locks_init_lock(&file_lock); |
4198 | switch (lock->lk_type) { | |
4199 | case NFS4_READ_LT: | |
4200 | case NFS4_READW_LT: | |
0997b173 BF |
4201 | filp = find_readable_file(lock_stp->st_file); |
4202 | if (filp) | |
4203 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4204 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4205 | break; |
1da177e4 LT |
4206 | case NFS4_WRITE_LT: |
4207 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4208 | filp = find_writeable_file(lock_stp->st_file); |
4209 | if (filp) | |
4210 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4211 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4212 | break; |
1da177e4 LT |
4213 | default: |
4214 | status = nfserr_inval; | |
4215 | goto out; | |
4216 | } | |
f9d7562f BF |
4217 | if (!filp) { |
4218 | status = nfserr_openmode; | |
4219 | goto out; | |
4220 | } | |
b59e3c0e | 4221 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4222 | file_lock.fl_pid = current->tgid; |
4223 | file_lock.fl_file = filp; | |
4224 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4225 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4226 | |
4227 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4228 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4229 | nfs4_transform_lock_offset(&file_lock); |
4230 | ||
4231 | /* | |
4232 | * Try to lock the file in the VFS. | |
4233 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4234 | */ | |
4235 | ||
529d7b2a | 4236 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4237 | switch (-err) { |
1da177e4 | 4238 | case 0: /* success! */ |
dcef0413 BF |
4239 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4240 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4241 | sizeof(stateid_t)); |
b8dd7b9a | 4242 | status = 0; |
eb76b3fd AA |
4243 | break; |
4244 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4245 | status = nfserr_denied; | |
4246 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4247 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4248 | break; | |
1da177e4 LT |
4249 | case (EDEADLK): |
4250 | status = nfserr_deadlock; | |
eb76b3fd | 4251 | break; |
3e772463 | 4252 | default: |
fd85b817 | 4253 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4254 | status = nfserrno(err); |
eb76b3fd | 4255 | break; |
1da177e4 | 4256 | } |
1da177e4 | 4257 | out: |
64a284d0 | 4258 | if (status && new_state) |
f044ff83 | 4259 | release_lockowner(lock_sop); |
5ec094c1 BF |
4260 | if (!cstate->replay_owner) |
4261 | nfs4_unlock_state(); | |
1da177e4 LT |
4262 | return status; |
4263 | } | |
4264 | ||
55ef1274 BF |
4265 | /* |
4266 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4267 | * so we do a temporary open here just to get an open file to pass to | |
4268 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4269 | * inode operation.) | |
4270 | */ | |
4271 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4272 | { | |
4273 | struct file *file; | |
4274 | int err; | |
4275 | ||
4276 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4277 | if (err) | |
4278 | return err; | |
4279 | err = vfs_test_lock(file, lock); | |
4280 | nfsd_close(file); | |
4281 | return err; | |
4282 | } | |
4283 | ||
1da177e4 LT |
4284 | /* |
4285 | * LOCKT operation | |
4286 | */ | |
b37ad28b | 4287 | __be32 |
ca364317 BF |
4288 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4289 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4290 | { |
4291 | struct inode *inode; | |
1da177e4 | 4292 | struct file_lock file_lock; |
fe0750e5 | 4293 | struct nfs4_lockowner *lo; |
fd85b817 | 4294 | int error; |
b37ad28b | 4295 | __be32 status; |
1da177e4 | 4296 | |
af558e33 | 4297 | if (locks_in_grace()) |
1da177e4 LT |
4298 | return nfserr_grace; |
4299 | ||
4300 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4301 | return nfserr_inval; | |
4302 | ||
1da177e4 LT |
4303 | nfs4_lock_state(); |
4304 | ||
4305 | status = nfserr_stale_clientid; | |
60adfc50 | 4306 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4307 | goto out; |
1da177e4 | 4308 | |
75c096f7 | 4309 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4310 | goto out; |
1da177e4 | 4311 | |
ca364317 | 4312 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4313 | locks_init_lock(&file_lock); |
4314 | switch (lockt->lt_type) { | |
4315 | case NFS4_READ_LT: | |
4316 | case NFS4_READW_LT: | |
4317 | file_lock.fl_type = F_RDLCK; | |
4318 | break; | |
4319 | case NFS4_WRITE_LT: | |
4320 | case NFS4_WRITEW_LT: | |
4321 | file_lock.fl_type = F_WRLCK; | |
4322 | break; | |
4323 | default: | |
2fdada03 | 4324 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4325 | status = nfserr_inval; |
4326 | goto out; | |
4327 | } | |
4328 | ||
fe0750e5 BF |
4329 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4330 | if (lo) | |
4331 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4332 | file_lock.fl_pid = current->tgid; |
4333 | file_lock.fl_flags = FL_POSIX; | |
4334 | ||
4335 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4336 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4337 | |
4338 | nfs4_transform_lock_offset(&file_lock); | |
4339 | ||
1da177e4 | 4340 | status = nfs_ok; |
55ef1274 | 4341 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4342 | if (error) { |
4343 | status = nfserrno(error); | |
4344 | goto out; | |
4345 | } | |
9d6a8c5c | 4346 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4347 | status = nfserr_denied; |
9d6a8c5c | 4348 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4349 | } |
4350 | out: | |
4351 | nfs4_unlock_state(); | |
4352 | return status; | |
4353 | } | |
4354 | ||
b37ad28b | 4355 | __be32 |
ca364317 | 4356 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4357 | struct nfsd4_locku *locku) |
1da177e4 | 4358 | { |
dcef0413 | 4359 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4360 | struct file *filp = NULL; |
4361 | struct file_lock file_lock; | |
b37ad28b | 4362 | __be32 status; |
b8dd7b9a | 4363 | int err; |
1da177e4 LT |
4364 | |
4365 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4366 | (long long) locku->lu_offset, | |
4367 | (long long) locku->lu_length); | |
4368 | ||
4369 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4370 | return nfserr_inval; | |
4371 | ||
4372 | nfs4_lock_state(); | |
4373 | ||
9072d5c6 | 4374 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4375 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4376 | if (status) |
1da177e4 | 4377 | goto out; |
f9d7562f BF |
4378 | filp = find_any_file(stp->st_file); |
4379 | if (!filp) { | |
4380 | status = nfserr_lock_range; | |
4381 | goto out; | |
4382 | } | |
1da177e4 LT |
4383 | BUG_ON(!filp); |
4384 | locks_init_lock(&file_lock); | |
4385 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4386 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4387 | file_lock.fl_pid = current->tgid; |
4388 | file_lock.fl_file = filp; | |
4389 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4390 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4391 | file_lock.fl_start = locku->lu_offset; |
4392 | ||
87df4de8 | 4393 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4394 | nfs4_transform_lock_offset(&file_lock); |
4395 | ||
4396 | /* | |
4397 | * Try to unlock the file in the VFS. | |
4398 | */ | |
fd85b817 | 4399 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4400 | if (err) { |
fd85b817 | 4401 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4402 | goto out_nfserr; |
4403 | } | |
4404 | /* | |
4405 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4406 | */ | |
dcef0413 BF |
4407 | update_stateid(&stp->st_stid.sc_stateid); |
4408 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4409 | |
4410 | out: | |
71c3bcd7 BF |
4411 | if (!cstate->replay_owner) |
4412 | nfs4_unlock_state(); | |
1da177e4 LT |
4413 | return status; |
4414 | ||
4415 | out_nfserr: | |
b8dd7b9a | 4416 | status = nfserrno(err); |
1da177e4 LT |
4417 | goto out; |
4418 | } | |
4419 | ||
4420 | /* | |
4421 | * returns | |
4422 | * 1: locks held by lockowner | |
4423 | * 0: no locks held by lockowner | |
4424 | */ | |
4425 | static int | |
fe0750e5 | 4426 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4427 | { |
4428 | struct file_lock **flpp; | |
f9d7562f | 4429 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4430 | int status = 0; |
4431 | ||
b89f4321 | 4432 | lock_flocks(); |
1da177e4 | 4433 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4434 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4435 | status = 1; |
4436 | goto out; | |
796dadfd | 4437 | } |
1da177e4 LT |
4438 | } |
4439 | out: | |
b89f4321 | 4440 | unlock_flocks(); |
1da177e4 LT |
4441 | return status; |
4442 | } | |
4443 | ||
b37ad28b | 4444 | __be32 |
b591480b BF |
4445 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4446 | struct nfsd4_compound_state *cstate, | |
4447 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4448 | { |
4449 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4450 | struct nfs4_stateowner *sop; |
fe0750e5 | 4451 | struct nfs4_lockowner *lo; |
dcef0413 | 4452 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4453 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4454 | struct list_head matches; |
16bfdaaf | 4455 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4456 | __be32 status; |
1da177e4 LT |
4457 | |
4458 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4459 | clid->cl_boot, clid->cl_id); | |
4460 | ||
4461 | /* XXX check for lease expiration */ | |
4462 | ||
4463 | status = nfserr_stale_clientid; | |
849823c5 | 4464 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4465 | return status; |
1da177e4 LT |
4466 | |
4467 | nfs4_lock_state(); | |
4468 | ||
3e9e3dbe | 4469 | status = nfserr_locks_held; |
3e9e3dbe | 4470 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4471 | |
16bfdaaf BF |
4472 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4473 | if (sop->so_is_open_owner) | |
4474 | continue; | |
06f1f864 BF |
4475 | if (!same_owner_str(sop, owner, clid)) |
4476 | continue; | |
4477 | list_for_each_entry(stp, &sop->so_stateids, | |
4478 | st_perstateowner) { | |
4479 | lo = lockowner(sop); | |
4480 | if (check_for_locks(stp->st_file, lo)) | |
4481 | goto out; | |
4482 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4483 | } |
3e9e3dbe N |
4484 | } |
4485 | /* Clients probably won't expect us to return with some (but not all) | |
4486 | * of the lockowner state released; so don't release any until all | |
4487 | * have been checked. */ | |
4488 | status = nfs_ok; | |
0fa822e4 | 4489 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4490 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4491 | lo_list); | |
0fa822e4 N |
4492 | /* unhash_stateowner deletes so_perclient only |
4493 | * for openowners. */ | |
fe0750e5 BF |
4494 | list_del(&lo->lo_list); |
4495 | release_lockowner(lo); | |
1da177e4 LT |
4496 | } |
4497 | out: | |
4498 | nfs4_unlock_state(); | |
4499 | return status; | |
4500 | } | |
4501 | ||
4502 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4503 | alloc_reclaim(void) |
1da177e4 | 4504 | { |
a55370a3 | 4505 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4506 | } |
4507 | ||
c7b9a459 | 4508 | int |
a1bcecd2 | 4509 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4510 | { |
4511 | unsigned int strhashval = clientstr_hashval(name); | |
4512 | struct nfs4_client *clp; | |
4513 | ||
e203d506 | 4514 | clp = find_confirmed_client_by_str(name, strhashval); |
393d8ed8 BF |
4515 | if (!clp) |
4516 | return 0; | |
a52d726b | 4517 | return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
c7b9a459 N |
4518 | } |
4519 | ||
1da177e4 LT |
4520 | /* |
4521 | * failure => all reset bets are off, nfserr_no_grace... | |
4522 | */ | |
190e4fbf N |
4523 | int |
4524 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4525 | { |
4526 | unsigned int strhashval; | |
4527 | struct nfs4_client_reclaim *crp = NULL; | |
4528 | ||
a55370a3 N |
4529 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4530 | crp = alloc_reclaim(); | |
1da177e4 LT |
4531 | if (!crp) |
4532 | return 0; | |
a55370a3 | 4533 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4534 | INIT_LIST_HEAD(&crp->cr_strhash); |
4535 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4536 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4537 | reclaim_str_hashtbl_size++; |
4538 | return 1; | |
4539 | } | |
4540 | ||
2a4317c5 | 4541 | void |
1da177e4 LT |
4542 | nfs4_release_reclaim(void) |
4543 | { | |
4544 | struct nfs4_client_reclaim *crp = NULL; | |
4545 | int i; | |
4546 | ||
1da177e4 LT |
4547 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4548 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4549 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4550 | struct nfs4_client_reclaim, cr_strhash); | |
4551 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4552 | kfree(crp); |
4553 | reclaim_str_hashtbl_size--; | |
4554 | } | |
4555 | } | |
4556 | BUG_ON(reclaim_str_hashtbl_size); | |
4557 | } | |
4558 | ||
4559 | /* | |
4560 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4561 | struct nfs4_client_reclaim * |
a52d726b | 4562 | nfsd4_find_reclaim_client(struct nfs4_client *clp) |
1da177e4 LT |
4563 | { |
4564 | unsigned int strhashval; | |
1da177e4 LT |
4565 | struct nfs4_client_reclaim *crp = NULL; |
4566 | ||
a55370a3 N |
4567 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4568 | clp->cl_name.len, clp->cl_name.data, | |
4569 | clp->cl_recdir); | |
1da177e4 LT |
4570 | |
4571 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4572 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4573 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4574 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4575 | return crp; |
4576 | } | |
4577 | } | |
4578 | return NULL; | |
4579 | } | |
4580 | ||
4581 | /* | |
4582 | * Called from OPEN. Look for clientid in reclaim list. | |
4583 | */ | |
b37ad28b | 4584 | __be32 |
1da177e4 LT |
4585 | nfs4_check_open_reclaim(clientid_t *clid) |
4586 | { | |
a52d726b JL |
4587 | struct nfs4_client *clp; |
4588 | ||
4589 | /* find clientid in conf_id_hashtbl */ | |
4590 | clp = find_confirmed_client(clid); | |
4591 | if (clp == NULL) | |
4592 | return nfserr_reclaim_bad; | |
4593 | ||
4594 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4595 | } |
4596 | ||
65178db4 BS |
4597 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4598 | ||
4599 | void nfsd_forget_clients(u64 num) | |
4600 | { | |
4601 | struct nfs4_client *clp, *next; | |
4602 | int count = 0; | |
4603 | ||
4604 | nfs4_lock_state(); | |
4605 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
2a4317c5 | 4606 | nfsd4_client_record_remove(clp); |
65178db4 BS |
4607 | expire_client(clp); |
4608 | if (++count == num) | |
4609 | break; | |
4610 | } | |
4611 | nfs4_unlock_state(); | |
4612 | ||
4613 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4614 | } | |
4615 | ||
4616 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4617 | { | |
4618 | release_lockowner(lockowner(sop)); | |
4619 | } | |
4620 | ||
4621 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4622 | { | |
4623 | release_openowner(openowner(sop)); | |
4624 | } | |
4625 | ||
353de31b | 4626 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4627 | void (*release_sop)(struct nfs4_stateowner *)) |
4628 | { | |
4629 | int i, count = 0; | |
4630 | struct nfs4_stateowner *sop, *next; | |
4631 | ||
16bfdaaf BF |
4632 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4633 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4634 | if (sop->so_is_open_owner != is_open_owner) | |
4635 | continue; | |
65178db4 BS |
4636 | release_sop(sop); |
4637 | if (++count == num) | |
4638 | return count; | |
4639 | } | |
4640 | } | |
4641 | return count; | |
4642 | } | |
4643 | ||
4644 | void nfsd_forget_locks(u64 num) | |
4645 | { | |
4646 | int count; | |
4647 | ||
4648 | nfs4_lock_state(); | |
16bfdaaf | 4649 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4650 | nfs4_unlock_state(); |
4651 | ||
4652 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4653 | } | |
4654 | ||
4655 | void nfsd_forget_openowners(u64 num) | |
4656 | { | |
4657 | int count; | |
4658 | ||
4659 | nfs4_lock_state(); | |
16bfdaaf | 4660 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4661 | nfs4_unlock_state(); |
4662 | ||
4663 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4664 | } | |
4665 | ||
4666 | int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) | |
4667 | { | |
4668 | int i, count = 0; | |
2d3475c0 BS |
4669 | struct nfs4_file *fp, *fnext; |
4670 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4671 | |
4672 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4673 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4674 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
65178db4 BS |
4675 | deleg_func(dp); |
4676 | if (++count == num) | |
4677 | return count; | |
4678 | } | |
4679 | } | |
4680 | } | |
2d3475c0 | 4681 | |
65178db4 BS |
4682 | return count; |
4683 | } | |
4684 | ||
4685 | void nfsd_forget_delegations(u64 num) | |
4686 | { | |
4687 | unsigned int count; | |
4688 | ||
4689 | nfs4_lock_state(); | |
4690 | count = nfsd_process_n_delegations(num, unhash_delegation); | |
4691 | nfs4_unlock_state(); | |
4692 | ||
4693 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4694 | } | |
4695 | ||
4696 | void nfsd_recall_delegations(u64 num) | |
4697 | { | |
4698 | unsigned int count; | |
4699 | ||
4700 | nfs4_lock_state(); | |
4701 | spin_lock(&recall_lock); | |
4702 | count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); | |
4703 | spin_unlock(&recall_lock); | |
4704 | nfs4_unlock_state(); | |
4705 | ||
4706 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4707 | } | |
4708 | ||
4709 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4710 | ||
ac4d8ff2 | 4711 | /* initialization to perform at module load time: */ |
1da177e4 | 4712 | |
72083396 | 4713 | void |
ac4d8ff2 | 4714 | nfs4_state_init(void) |
1da177e4 | 4715 | { |
72083396 | 4716 | int i; |
1da177e4 | 4717 | |
1da177e4 LT |
4718 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4719 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4720 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4721 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4722 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4723 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4724 | } |
5282fd72 ME |
4725 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4726 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4727 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4728 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4729 | } | |
16bfdaaf BF |
4730 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4731 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4732 | } |
009673b4 BF |
4733 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4734 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4735 | INIT_LIST_HEAD(&close_lru); |
4736 | INIT_LIST_HEAD(&client_lru); | |
4737 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4738 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4739 | } |
4740 | ||
c2f1a551 MS |
4741 | /* |
4742 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4743 | * client may quite reasonably hang on to a delegation as long as it has | |
4744 | * the inode cached. This becomes an obvious problem the first time a | |
4745 | * client's inode cache approaches the size of the server's total memory. | |
4746 | * | |
4747 | * For now we avoid this problem by imposing a hard limit on the number | |
4748 | * of delegations, which varies according to the server's memory size. | |
4749 | */ | |
4750 | static void | |
4751 | set_max_delegations(void) | |
4752 | { | |
4753 | /* | |
4754 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4755 | * estimates suggest that in the worst case (where every delegation | |
4756 | * is for a different inode), a delegation could take about 1.5K, | |
4757 | * giving a worst case usage of about 6% of memory. | |
4758 | */ | |
4759 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4760 | } | |
4761 | ||
ac4d8ff2 N |
4762 | /* initialization to perform when the nfsd service is started: */ |
4763 | ||
a6d6b781 JL |
4764 | int |
4765 | nfs4_state_start(void) | |
ac4d8ff2 | 4766 | { |
b5a1a81e BF |
4767 | int ret; |
4768 | ||
2a4317c5 JL |
4769 | /* |
4770 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4771 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4772 | * need to pass a net pointer into this function, take a reference | |
4773 | * to that instead and then do most of the rest of this on a per-net | |
4774 | * basis. | |
4775 | */ | |
4776 | get_net(&init_net); | |
4777 | nfsd4_client_tracking_init(&init_net); | |
1da177e4 | 4778 | boot_time = get_seconds(); |
af558e33 | 4779 | locks_start_grace(&nfsd4_manager); |
33dcc481 | 4780 | grace_ended = false; |
9a8db97e | 4781 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4782 | nfsd4_grace); |
b5a1a81e | 4783 | ret = set_callback_cred(); |
a6d6b781 JL |
4784 | if (ret) { |
4785 | ret = -ENOMEM; | |
4786 | goto out_recovery; | |
4787 | } | |
58da282b | 4788 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4789 | if (laundry_wq == NULL) { |
4790 | ret = -ENOMEM; | |
4791 | goto out_recovery; | |
4792 | } | |
b5a1a81e BF |
4793 | ret = nfsd4_create_callback_queue(); |
4794 | if (ret) | |
4795 | goto out_free_laundry; | |
e46b498c | 4796 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4797 | set_max_delegations(); |
b5a1a81e BF |
4798 | return 0; |
4799 | out_free_laundry: | |
4800 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4801 | out_recovery: |
2a4317c5 JL |
4802 | nfsd4_client_tracking_exit(&init_net); |
4803 | put_net(&init_net); | |
b5a1a81e | 4804 | return ret; |
1da177e4 LT |
4805 | } |
4806 | ||
1da177e4 LT |
4807 | static void |
4808 | __nfs4_state_shutdown(void) | |
4809 | { | |
4810 | int i; | |
4811 | struct nfs4_client *clp = NULL; | |
4812 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4813 | struct list_head *pos, *next, reaplist; |
4814 | ||
1da177e4 LT |
4815 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4816 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4817 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4818 | expire_client(clp); | |
4819 | } | |
4820 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4821 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4822 | expire_client(clp); | |
4823 | } | |
4824 | } | |
4825 | INIT_LIST_HEAD(&reaplist); | |
4826 | spin_lock(&recall_lock); | |
4827 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4828 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4829 | list_move(&dp->dl_recall_lru, &reaplist); | |
4830 | } | |
4831 | spin_unlock(&recall_lock); | |
4832 | list_for_each_safe(pos, next, &reaplist) { | |
4833 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4834 | unhash_delegation(dp); |
4835 | } | |
4836 | ||
2a4317c5 JL |
4837 | nfsd4_client_tracking_exit(&init_net); |
4838 | put_net(&init_net); | |
1da177e4 LT |
4839 | } |
4840 | ||
4841 | void | |
4842 | nfs4_state_shutdown(void) | |
4843 | { | |
afe2c511 | 4844 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4845 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4846 | locks_end_grace(&nfsd4_manager); |
1da177e4 | 4847 | nfs4_lock_state(); |
1da177e4 | 4848 | __nfs4_state_shutdown(); |
1da177e4 | 4849 | nfs4_unlock_state(); |
c3935e30 | 4850 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4851 | } |
8b70484c TM |
4852 | |
4853 | static void | |
4854 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4855 | { | |
37c593c5 TM |
4856 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4857 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4858 | } |
4859 | ||
4860 | static void | |
4861 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4862 | { | |
37c593c5 TM |
4863 | if (cstate->minorversion) { |
4864 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4865 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4866 | } | |
4867 | } | |
4868 | ||
4869 | void | |
4870 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4871 | { | |
4872 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4873 | } |
4874 | ||
62cd4a59 TM |
4875 | /* |
4876 | * functions to set current state id | |
4877 | */ | |
9428fe1a TM |
4878 | void |
4879 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4880 | { | |
4881 | put_stateid(cstate, &odp->od_stateid); | |
4882 | } | |
4883 | ||
8b70484c TM |
4884 | void |
4885 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4886 | { | |
4887 | put_stateid(cstate, &open->op_stateid); | |
4888 | } | |
4889 | ||
62cd4a59 TM |
4890 | void |
4891 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4892 | { | |
4893 | put_stateid(cstate, &close->cl_stateid); | |
4894 | } | |
4895 | ||
4896 | void | |
4897 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4898 | { | |
4899 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4900 | } | |
4901 | ||
4902 | /* | |
4903 | * functions to consume current state id | |
4904 | */ | |
1e97b519 | 4905 | |
9428fe1a TM |
4906 | void |
4907 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4908 | { | |
4909 | get_stateid(cstate, &odp->od_stateid); | |
4910 | } | |
4911 | ||
4912 | void | |
4913 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4914 | { | |
4915 | get_stateid(cstate, &drp->dr_stateid); | |
4916 | } | |
4917 | ||
1e97b519 TM |
4918 | void |
4919 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4920 | { | |
4921 | get_stateid(cstate, &fsp->fr_stateid); | |
4922 | } | |
4923 | ||
4924 | void | |
4925 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4926 | { | |
4927 | get_stateid(cstate, &setattr->sa_stateid); | |
4928 | } | |
4929 | ||
8b70484c TM |
4930 | void |
4931 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4932 | { | |
4933 | get_stateid(cstate, &close->cl_stateid); | |
4934 | } | |
4935 | ||
4936 | void | |
62cd4a59 | 4937 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4938 | { |
62cd4a59 | 4939 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4940 | } |
30813e27 TM |
4941 | |
4942 | void | |
4943 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4944 | { | |
4945 | get_stateid(cstate, &read->rd_stateid); | |
4946 | } | |
4947 | ||
4948 | void | |
4949 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
4950 | { | |
4951 | get_stateid(cstate, &write->wr_stateid); | |
4952 | } |