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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 | ||
f9d7562f BF |
495 | static int nfs4_access_to_omode(u32 access) |
496 | { | |
8f34a430 | 497 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
498 | case NFS4_SHARE_ACCESS_READ: |
499 | return O_RDONLY; | |
500 | case NFS4_SHARE_ACCESS_WRITE: | |
501 | return O_WRONLY; | |
502 | case NFS4_SHARE_ACCESS_BOTH: | |
503 | return O_RDWR; | |
504 | } | |
505 | BUG(); | |
506 | } | |
507 | ||
82c5ff1b JL |
508 | /* release all access and file references for a given stateid */ |
509 | static void | |
510 | release_all_access(struct nfs4_ol_stateid *stp) | |
511 | { | |
512 | int i; | |
513 | ||
514 | for (i = 1; i < 4; i++) { | |
515 | if (test_access(i, stp)) | |
516 | nfs4_file_put_access(stp->st_file, | |
517 | nfs4_access_to_omode(i)); | |
518 | clear_access(i, stp); | |
519 | } | |
520 | } | |
521 | ||
dcef0413 | 522 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 523 | { |
529d7b2a BF |
524 | list_del(&stp->st_perfile); |
525 | list_del(&stp->st_perstateowner); | |
526 | } | |
527 | ||
dcef0413 | 528 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 529 | { |
82c5ff1b | 530 | release_all_access(stp); |
a96e5b90 | 531 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
532 | stp->st_file = NULL; |
533 | } | |
534 | ||
dcef0413 | 535 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 536 | { |
529d7b2a BF |
537 | kmem_cache_free(stateid_slab, stp); |
538 | } | |
539 | ||
dcef0413 | 540 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
541 | { |
542 | struct file *file; | |
543 | ||
544 | unhash_generic_stateid(stp); | |
6136d2b4 | 545 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
546 | file = find_any_file(stp->st_file); |
547 | if (file) | |
fe0750e5 | 548 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 549 | close_generic_stateid(stp); |
529d7b2a BF |
550 | free_generic_stateid(stp); |
551 | } | |
552 | ||
fe0750e5 | 553 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 554 | { |
dcef0413 | 555 | struct nfs4_ol_stateid *stp; |
529d7b2a | 556 | |
fe0750e5 BF |
557 | list_del(&lo->lo_owner.so_strhash); |
558 | list_del(&lo->lo_perstateid); | |
009673b4 | 559 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
560 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
561 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 562 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
563 | release_lock_stateid(stp); |
564 | } | |
565 | } | |
566 | ||
fe0750e5 | 567 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 568 | { |
fe0750e5 BF |
569 | unhash_lockowner(lo); |
570 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
571 | } |
572 | ||
573 | static void | |
dcef0413 | 574 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 575 | { |
fe0750e5 | 576 | struct nfs4_lockowner *lo; |
529d7b2a BF |
577 | |
578 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
579 | lo = list_entry(open_stp->st_lockowners.next, |
580 | struct nfs4_lockowner, lo_perstateid); | |
581 | release_lockowner(lo); | |
529d7b2a BF |
582 | } |
583 | } | |
584 | ||
38c387b5 | 585 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
586 | { |
587 | unhash_generic_stateid(stp); | |
588 | release_stateid_lockowners(stp); | |
38c387b5 BF |
589 | close_generic_stateid(stp); |
590 | } | |
591 | ||
592 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
593 | { | |
594 | unhash_open_stateid(stp); | |
6136d2b4 | 595 | unhash_stid(&stp->st_stid); |
2283963f BF |
596 | free_generic_stateid(stp); |
597 | } | |
598 | ||
fe0750e5 | 599 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 600 | { |
dcef0413 | 601 | struct nfs4_ol_stateid *stp; |
f1d110ca | 602 | |
fe0750e5 BF |
603 | list_del(&oo->oo_owner.so_strhash); |
604 | list_del(&oo->oo_perclient); | |
605 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
606 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 607 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 608 | release_open_stateid(stp); |
f1d110ca BF |
609 | } |
610 | } | |
611 | ||
f7a4d872 BF |
612 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
613 | { | |
614 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
615 | ||
616 | if (s) { | |
6136d2b4 | 617 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
618 | free_generic_stateid(s); |
619 | oo->oo_last_closed_stid = NULL; | |
620 | } | |
621 | } | |
622 | ||
fe0750e5 | 623 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 624 | { |
fe0750e5 BF |
625 | unhash_openowner(oo); |
626 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 627 | release_last_closed_stateid(oo); |
fe0750e5 | 628 | nfs4_free_openowner(oo); |
f1d110ca BF |
629 | } |
630 | ||
5282fd72 ME |
631 | #define SESSION_HASH_SIZE 512 |
632 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
633 | ||
634 | static inline int | |
635 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
636 | { | |
637 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
638 | ||
639 | return sid->sequence % SESSION_HASH_SIZE; | |
640 | } | |
641 | ||
8f199b82 | 642 | #ifdef NFSD_DEBUG |
5282fd72 ME |
643 | static inline void |
644 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
645 | { | |
646 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
647 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
648 | } | |
8f199b82 TM |
649 | #else |
650 | static inline void | |
651 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
652 | { | |
653 | } | |
654 | #endif | |
655 | ||
5282fd72 | 656 | |
ec6b5d7b AA |
657 | static void |
658 | gen_sessionid(struct nfsd4_session *ses) | |
659 | { | |
660 | struct nfs4_client *clp = ses->se_client; | |
661 | struct nfsd4_sessionid *sid; | |
662 | ||
663 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
664 | sid->clientid = clp->cl_clientid; | |
665 | sid->sequence = current_sessionid++; | |
666 | sid->reserved = 0; | |
667 | } | |
668 | ||
669 | /* | |
a649637c AA |
670 | * The protocol defines ca_maxresponssize_cached to include the size of |
671 | * the rpc header, but all we need to cache is the data starting after | |
672 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
673 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
674 | * value that is the number of bytes in our cache plus a few additional | |
675 | * bytes. In order to stay on the safe side, and not promise more than | |
676 | * we can cache, those additional bytes must be the minimum possible: 24 | |
677 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
678 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
679 | * for the SEQUENCE op response: | |
680 | */ | |
681 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
682 | ||
557ce264 AA |
683 | static void |
684 | free_session_slots(struct nfsd4_session *ses) | |
685 | { | |
686 | int i; | |
687 | ||
688 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
689 | kfree(ses->se_slots[i]); | |
690 | } | |
691 | ||
a649637c | 692 | /* |
efe0cb6d BF |
693 | * We don't actually need to cache the rpc and session headers, so we |
694 | * can allocate a little less for each slot: | |
695 | */ | |
696 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
697 | { | |
698 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
699 | } | |
700 | ||
5b6feee9 | 701 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 702 | { |
5b6feee9 BF |
703 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
704 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 705 | |
5b6feee9 BF |
706 | return size; |
707 | } | |
ec6b5d7b | 708 | |
5b6feee9 BF |
709 | /* |
710 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 711 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 712 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 713 | */ |
5b6feee9 | 714 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 715 | { |
5b6feee9 | 716 | int avail; |
ec6b5d7b | 717 | |
5b6feee9 | 718 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 719 | |
5b6feee9 BF |
720 | spin_lock(&nfsd_drc_lock); |
721 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
722 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
723 | num = min_t(int, num, avail / slotsize); | |
724 | nfsd_drc_mem_used += num * slotsize; | |
725 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 726 | |
5b6feee9 BF |
727 | return num; |
728 | } | |
ec6b5d7b | 729 | |
5b6feee9 BF |
730 | static void nfsd4_put_drc_mem(int slotsize, int num) |
731 | { | |
4bd9b0f4 | 732 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 733 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 734 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 735 | } |
ec6b5d7b | 736 | |
5b6feee9 BF |
737 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
738 | { | |
739 | struct nfsd4_session *new; | |
740 | int mem, i; | |
a649637c | 741 | |
5b6feee9 BF |
742 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
743 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
744 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 745 | |
5b6feee9 BF |
746 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
747 | if (!new) | |
748 | return NULL; | |
557ce264 | 749 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
750 | for (i = 0; i < numslots; i++) { |
751 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
752 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
753 | if (!new->se_slots[i]) | |
557ce264 | 754 | goto out_free; |
557ce264 | 755 | } |
5b6feee9 BF |
756 | return new; |
757 | out_free: | |
758 | while (i--) | |
759 | kfree(new->se_slots[i]); | |
760 | kfree(new); | |
761 | return NULL; | |
ec6b5d7b AA |
762 | } |
763 | ||
5b6feee9 | 764 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 765 | { |
5b6feee9 | 766 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 767 | |
5b6feee9 | 768 | new->maxreqs = numslots; |
d2b21743 MJ |
769 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
770 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
771 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
772 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
773 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
774 | } | |
ec6b5d7b | 775 | |
19cf5c02 BF |
776 | static void free_conn(struct nfsd4_conn *c) |
777 | { | |
778 | svc_xprt_put(c->cn_xprt); | |
779 | kfree(c); | |
780 | } | |
ec6b5d7b | 781 | |
19cf5c02 BF |
782 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
783 | { | |
784 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
785 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 786 | |
19cf5c02 BF |
787 | spin_lock(&clp->cl_lock); |
788 | if (!list_empty(&c->cn_persession)) { | |
789 | list_del(&c->cn_persession); | |
790 | free_conn(c); | |
791 | } | |
792 | spin_unlock(&clp->cl_lock); | |
eea49806 | 793 | nfsd4_probe_callback(clp); |
19cf5c02 | 794 | } |
ec6b5d7b | 795 | |
d29c374c | 796 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 797 | { |
c7662518 | 798 | struct nfsd4_conn *conn; |
ec6b5d7b | 799 | |
c7662518 BF |
800 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
801 | if (!conn) | |
db90681d | 802 | return NULL; |
c7662518 BF |
803 | svc_xprt_get(rqstp->rq_xprt); |
804 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 805 | conn->cn_flags = flags; |
db90681d BF |
806 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
807 | return conn; | |
808 | } | |
a649637c | 809 | |
328ead28 BF |
810 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
811 | { | |
812 | conn->cn_session = ses; | |
813 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
814 | } |
815 | ||
db90681d | 816 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 817 | { |
db90681d | 818 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 819 | |
c7662518 | 820 | spin_lock(&clp->cl_lock); |
328ead28 | 821 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 822 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
823 | } |
824 | ||
21b75b01 | 825 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 826 | { |
19cf5c02 | 827 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 828 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
829 | } |
830 | ||
1d1bc8f2 | 831 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 832 | { |
db90681d | 833 | struct nfsd4_conn *conn; |
21b75b01 | 834 | int ret; |
ec6b5d7b | 835 | |
1d1bc8f2 | 836 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
837 | if (!conn) |
838 | return nfserr_jukebox; | |
839 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
840 | ret = nfsd4_register_conn(conn); |
841 | if (ret) | |
842 | /* oops; xprt is already down: */ | |
843 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
844 | return nfs_ok; |
845 | } | |
ec6b5d7b | 846 | |
1d1bc8f2 BF |
847 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
848 | { | |
849 | u32 dir = NFS4_CDFC4_FORE; | |
850 | ||
851 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
852 | dir |= NFS4_CDFC4_BACK; | |
853 | ||
854 | return nfsd4_new_conn(rqstp, ses, dir); | |
855 | } | |
856 | ||
857 | /* must be called under client_lock */ | |
19cf5c02 | 858 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 859 | { |
19cf5c02 BF |
860 | struct nfs4_client *clp = s->se_client; |
861 | struct nfsd4_conn *c; | |
ec6b5d7b | 862 | |
19cf5c02 BF |
863 | spin_lock(&clp->cl_lock); |
864 | while (!list_empty(&s->se_conns)) { | |
865 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
866 | list_del_init(&c->cn_persession); | |
867 | spin_unlock(&clp->cl_lock); | |
557ce264 | 868 | |
19cf5c02 BF |
869 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
870 | free_conn(c); | |
ec6b5d7b | 871 | |
19cf5c02 BF |
872 | spin_lock(&clp->cl_lock); |
873 | } | |
874 | spin_unlock(&clp->cl_lock); | |
c7662518 | 875 | } |
ec6b5d7b | 876 | |
508dc6e1 | 877 | static void free_session(struct kref *kref) |
c7662518 BF |
878 | { |
879 | struct nfsd4_session *ses; | |
880 | int mem; | |
881 | ||
508dc6e1 | 882 | BUG_ON(!spin_is_locked(&client_lock)); |
c7662518 | 883 | ses = container_of(kref, struct nfsd4_session, se_ref); |
19cf5c02 | 884 | nfsd4_del_conns(ses); |
c7662518 BF |
885 | spin_lock(&nfsd_drc_lock); |
886 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
887 | nfsd_drc_mem_used -= mem; | |
888 | spin_unlock(&nfsd_drc_lock); | |
889 | free_session_slots(ses); | |
890 | kfree(ses); | |
891 | } | |
892 | ||
508dc6e1 BH |
893 | void nfsd4_put_session(struct nfsd4_session *ses) |
894 | { | |
895 | spin_lock(&client_lock); | |
896 | nfsd4_put_session_locked(ses); | |
897 | spin_unlock(&client_lock); | |
898 | } | |
899 | ||
ac7c46f2 | 900 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
901 | { |
902 | struct nfsd4_session *new; | |
903 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
904 | int numslots, slotsize; | |
57b7b43b | 905 | __be32 status; |
5b6feee9 BF |
906 | int idx; |
907 | ||
908 | /* | |
909 | * Note decreasing slot size below client's request may | |
910 | * make it difficult for client to function correctly, whereas | |
911 | * decreasing the number of slots will (just?) affect | |
912 | * performance. When short on memory we therefore prefer to | |
913 | * decrease number of slots instead of their size. | |
914 | */ | |
915 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
916 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
917 | if (numslots < 1) |
918 | return NULL; | |
5b6feee9 BF |
919 | |
920 | new = alloc_session(slotsize, numslots); | |
921 | if (!new) { | |
922 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 923 | return NULL; |
557ce264 | 924 | } |
5b6feee9 | 925 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 926 | |
ec6b5d7b AA |
927 | new->se_client = clp; |
928 | gen_sessionid(new); | |
ec6b5d7b | 929 | |
c7662518 BF |
930 | INIT_LIST_HEAD(&new->se_conns); |
931 | ||
ac7c46f2 | 932 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 933 | new->se_flags = cses->flags; |
8b5ce5cd | 934 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 935 | kref_init(&new->se_ref); |
5b6feee9 | 936 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 937 | spin_lock(&client_lock); |
ec6b5d7b | 938 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 939 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 940 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 941 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 942 | spin_unlock(&client_lock); |
ec6b5d7b | 943 | |
1d1bc8f2 | 944 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 945 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 | 946 | if (status) { |
508dc6e1 | 947 | spin_lock(&client_lock); |
c7662518 | 948 | free_session(&new->se_ref); |
508dc6e1 | 949 | spin_unlock(&client_lock); |
ac7c46f2 | 950 | return NULL; |
c7662518 | 951 | } |
dcbeaa68 | 952 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 953 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
954 | /* |
955 | * This is a little silly; with sessions there's no real | |
956 | * use for the callback address. Use the peer address | |
957 | * as a reasonable default for now, but consider fixing | |
958 | * the rpc client not to require an address in the | |
959 | * future: | |
960 | */ | |
edd76786 BF |
961 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
962 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 963 | } |
dcbeaa68 | 964 | nfsd4_probe_callback(clp); |
ac7c46f2 | 965 | return new; |
ec6b5d7b AA |
966 | } |
967 | ||
9089f1b4 | 968 | /* caller must hold client_lock */ |
5282fd72 ME |
969 | static struct nfsd4_session * |
970 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
971 | { | |
972 | struct nfsd4_session *elem; | |
973 | int idx; | |
974 | ||
975 | dump_sessionid(__func__, sessionid); | |
976 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
977 | /* Search in the appropriate list */ |
978 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
979 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
980 | NFS4_MAX_SESSIONID_LEN)) { | |
981 | return elem; | |
982 | } | |
983 | } | |
984 | ||
985 | dprintk("%s: session not found\n", __func__); | |
986 | return NULL; | |
987 | } | |
988 | ||
9089f1b4 | 989 | /* caller must hold client_lock */ |
7116ed6b | 990 | static void |
5282fd72 | 991 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
992 | { |
993 | list_del(&ses->se_hash); | |
4c649378 | 994 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 995 | list_del(&ses->se_perclnt); |
4c649378 | 996 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
997 | } |
998 | ||
36acb66b | 999 | /* must be called under the client_lock */ |
1da177e4 | 1000 | static inline void |
36acb66b | 1001 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 1002 | { |
07cd4909 BH |
1003 | if (is_client_expired(clp)) { |
1004 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
1005 | __func__, | |
1006 | clp->cl_clientid.cl_boot, | |
1007 | clp->cl_clientid.cl_id); | |
1008 | return; | |
1009 | } | |
1010 | ||
1da177e4 LT |
1011 | dprintk("renewing client (clientid %08x/%08x)\n", |
1012 | clp->cl_clientid.cl_boot, | |
1013 | clp->cl_clientid.cl_id); | |
1014 | list_move_tail(&clp->cl_lru, &client_lru); | |
1015 | clp->cl_time = get_seconds(); | |
1016 | } | |
1017 | ||
36acb66b BH |
1018 | static inline void |
1019 | renew_client(struct nfs4_client *clp) | |
1020 | { | |
1021 | spin_lock(&client_lock); | |
1022 | renew_client_locked(clp); | |
1023 | spin_unlock(&client_lock); | |
1024 | } | |
1025 | ||
1da177e4 LT |
1026 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1027 | static int | |
1028 | STALE_CLIENTID(clientid_t *clid) | |
1029 | { | |
1030 | if (clid->cl_boot == boot_time) | |
1031 | return 0; | |
60adfc50 AA |
1032 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
1033 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
1034 | return 1; |
1035 | } | |
1036 | ||
1037 | /* | |
1038 | * XXX Should we use a slab cache ? | |
1039 | * This type of memory management is somewhat inefficient, but we use it | |
1040 | * anyway since SETCLIENTID is not a common operation. | |
1041 | */ | |
35bba9a3 | 1042 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1043 | { |
1044 | struct nfs4_client *clp; | |
1045 | ||
35bba9a3 BF |
1046 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1047 | if (clp == NULL) | |
1048 | return NULL; | |
67114fe6 | 1049 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1050 | if (clp->cl_name.data == NULL) { |
1051 | kfree(clp); | |
1052 | return NULL; | |
1da177e4 | 1053 | } |
35bba9a3 | 1054 | clp->cl_name.len = name.len; |
1da177e4 LT |
1055 | return clp; |
1056 | } | |
1057 | ||
1058 | static inline void | |
1059 | free_client(struct nfs4_client *clp) | |
1060 | { | |
508dc6e1 | 1061 | BUG_ON(!spin_is_locked(&client_lock)); |
792c95dd BF |
1062 | while (!list_empty(&clp->cl_sessions)) { |
1063 | struct nfsd4_session *ses; | |
1064 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1065 | se_perclnt); | |
1066 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1067 | nfsd4_put_session_locked(ses); |
792c95dd | 1068 | } |
1da177e4 LT |
1069 | if (clp->cl_cred.cr_group_info) |
1070 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 1071 | kfree(clp->cl_principal); |
1da177e4 LT |
1072 | kfree(clp->cl_name.data); |
1073 | kfree(clp); | |
1074 | } | |
1075 | ||
d7682988 BH |
1076 | void |
1077 | release_session_client(struct nfsd4_session *session) | |
1078 | { | |
1079 | struct nfs4_client *clp = session->se_client; | |
1080 | ||
1081 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1082 | return; | |
1083 | if (is_client_expired(clp)) { | |
1084 | free_client(clp); | |
1085 | session->se_client = NULL; | |
1086 | } else | |
1087 | renew_client_locked(clp); | |
1088 | spin_unlock(&client_lock); | |
d7682988 BH |
1089 | } |
1090 | ||
84d38ac9 BH |
1091 | /* must be called under the client_lock */ |
1092 | static inline void | |
1093 | unhash_client_locked(struct nfs4_client *clp) | |
1094 | { | |
792c95dd BF |
1095 | struct nfsd4_session *ses; |
1096 | ||
07cd4909 | 1097 | mark_client_expired(clp); |
84d38ac9 | 1098 | list_del(&clp->cl_lru); |
4c649378 | 1099 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1100 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1101 | list_del_init(&ses->se_hash); | |
4c649378 | 1102 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1103 | } |
1104 | ||
1da177e4 LT |
1105 | static void |
1106 | expire_client(struct nfs4_client *clp) | |
1107 | { | |
fe0750e5 | 1108 | struct nfs4_openowner *oo; |
1da177e4 | 1109 | struct nfs4_delegation *dp; |
1da177e4 LT |
1110 | struct list_head reaplist; |
1111 | ||
1da177e4 LT |
1112 | INIT_LIST_HEAD(&reaplist); |
1113 | spin_lock(&recall_lock); | |
ea1da636 N |
1114 | while (!list_empty(&clp->cl_delegations)) { |
1115 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1116 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1117 | list_move(&dp->dl_recall_lru, &reaplist); |
1118 | } | |
1119 | spin_unlock(&recall_lock); | |
1120 | while (!list_empty(&reaplist)) { | |
1121 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1122 | unhash_delegation(dp); |
1123 | } | |
ea1da636 | 1124 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1125 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1126 | release_openowner(oo); | |
1da177e4 | 1127 | } |
6ff8da08 | 1128 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1129 | if (clp->cl_cb_conn.cb_xprt) |
1130 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1131 | list_del(&clp->cl_idhash); |
1132 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1133 | spin_lock(&client_lock); |
84d38ac9 | 1134 | unhash_client_locked(clp); |
46583e25 BH |
1135 | if (atomic_read(&clp->cl_refcount) == 0) |
1136 | free_client(clp); | |
be1fdf6c | 1137 | spin_unlock(&client_lock); |
1da177e4 LT |
1138 | } |
1139 | ||
35bba9a3 BF |
1140 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1141 | { | |
1142 | memcpy(target->cl_verifier.data, source->data, | |
1143 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1144 | } |
1145 | ||
35bba9a3 BF |
1146 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1147 | { | |
1da177e4 LT |
1148 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1149 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1150 | } | |
1151 | ||
35bba9a3 BF |
1152 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1153 | { | |
1da177e4 LT |
1154 | target->cr_uid = source->cr_uid; |
1155 | target->cr_gid = source->cr_gid; | |
1156 | target->cr_group_info = source->cr_group_info; | |
1157 | get_group_info(target->cr_group_info); | |
1158 | } | |
1159 | ||
35bba9a3 | 1160 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1161 | { |
a55370a3 | 1162 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1163 | } |
1164 | ||
1165 | static int | |
599e0a22 BF |
1166 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1167 | { | |
1168 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1169 | } |
1170 | ||
1171 | static int | |
599e0a22 BF |
1172 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1173 | { | |
1174 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1175 | } |
1176 | ||
1177 | /* XXX what about NGROUP */ | |
1178 | static int | |
599e0a22 BF |
1179 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1180 | { | |
1181 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1182 | } |
1183 | ||
5ec7b46c BF |
1184 | static void gen_clid(struct nfs4_client *clp) |
1185 | { | |
1186 | static u32 current_clientid = 1; | |
1187 | ||
1da177e4 LT |
1188 | clp->cl_clientid.cl_boot = boot_time; |
1189 | clp->cl_clientid.cl_id = current_clientid++; | |
1190 | } | |
1191 | ||
deda2faa BF |
1192 | static void gen_confirm(struct nfs4_client *clp) |
1193 | { | |
ab4684d1 | 1194 | __be32 verf[2]; |
deda2faa | 1195 | static u32 i; |
1da177e4 | 1196 | |
ab4684d1 CL |
1197 | verf[0] = (__be32)get_seconds(); |
1198 | verf[1] = (__be32)i++; | |
1199 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1200 | } |
1201 | ||
38c2f4b1 | 1202 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1203 | { |
38c2f4b1 | 1204 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1205 | } |
1206 | ||
38c2f4b1 | 1207 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1208 | { |
1209 | struct nfs4_stid *s; | |
4d71ab87 | 1210 | |
38c2f4b1 | 1211 | s = find_stateid(cl, t); |
4d71ab87 BF |
1212 | if (!s) |
1213 | return NULL; | |
f459e453 | 1214 | if (typemask & s->sc_type) |
4581d140 | 1215 | return s; |
4581d140 BF |
1216 | return NULL; |
1217 | } | |
1218 | ||
b09333c4 RL |
1219 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1220 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1221 | { | |
1222 | struct nfs4_client *clp; | |
1223 | struct sockaddr *sa = svc_addr(rqstp); | |
1224 | char *princ; | |
1225 | ||
1226 | clp = alloc_client(name); | |
1227 | if (clp == NULL) | |
1228 | return NULL; | |
1229 | ||
792c95dd BF |
1230 | INIT_LIST_HEAD(&clp->cl_sessions); |
1231 | ||
b09333c4 RL |
1232 | princ = svc_gss_principal(rqstp); |
1233 | if (princ) { | |
1234 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1235 | if (clp->cl_principal == NULL) { | |
508dc6e1 | 1236 | spin_lock(&client_lock); |
b09333c4 | 1237 | free_client(clp); |
508dc6e1 | 1238 | spin_unlock(&client_lock); |
b09333c4 RL |
1239 | return NULL; |
1240 | } | |
1241 | } | |
1242 | ||
38c2f4b1 | 1243 | idr_init(&clp->cl_stateids); |
b09333c4 | 1244 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1245 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1246 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1247 | INIT_LIST_HEAD(&clp->cl_idhash); |
1248 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1249 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1250 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1251 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1252 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1253 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1254 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1255 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1256 | clear_bit(0, &clp->cl_cb_slot_busy); |
1257 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1258 | copy_verf(clp, verf); | |
1259 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1260 | clp->cl_flavor = rqstp->rq_flavor; | |
1261 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1262 | gen_confirm(clp); | |
edd76786 | 1263 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1264 | return clp; |
1265 | } | |
1266 | ||
fd39ca9a | 1267 | static void |
1da177e4 LT |
1268 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1269 | { | |
1270 | unsigned int idhashval; | |
1271 | ||
1272 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1273 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1274 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1275 | renew_client(clp); |
1da177e4 LT |
1276 | } |
1277 | ||
fd39ca9a | 1278 | static void |
1da177e4 LT |
1279 | move_to_confirmed(struct nfs4_client *clp) |
1280 | { | |
1281 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1282 | unsigned int strhashval; | |
1283 | ||
1284 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1285 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1286 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1287 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1288 | renew_client(clp); |
1289 | } | |
1290 | ||
1291 | static struct nfs4_client * | |
1292 | find_confirmed_client(clientid_t *clid) | |
1293 | { | |
1294 | struct nfs4_client *clp; | |
1295 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1296 | ||
1297 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 BF |
1298 | if (same_clid(&clp->cl_clientid, clid)) { |
1299 | renew_client(clp); | |
1da177e4 | 1300 | return clp; |
a50d2ad1 | 1301 | } |
1da177e4 LT |
1302 | } |
1303 | return NULL; | |
1304 | } | |
1305 | ||
1306 | static struct nfs4_client * | |
1307 | find_unconfirmed_client(clientid_t *clid) | |
1308 | { | |
1309 | struct nfs4_client *clp; | |
1310 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1311 | ||
1312 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1313 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1314 | return clp; |
1315 | } | |
1316 | return NULL; | |
1317 | } | |
1318 | ||
6e5f15c9 | 1319 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1320 | { |
6e5f15c9 | 1321 | return clp->cl_exchange_flags != 0; |
e203d506 | 1322 | } |
a1bcecd2 | 1323 | |
28ce6054 | 1324 | static struct nfs4_client * |
e203d506 | 1325 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1326 | { |
1327 | struct nfs4_client *clp; | |
1328 | ||
1329 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1330 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1331 | return clp; |
1332 | } | |
1333 | return NULL; | |
1334 | } | |
1335 | ||
1336 | static struct nfs4_client * | |
e203d506 | 1337 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1338 | { |
1339 | struct nfs4_client *clp; | |
1340 | ||
1341 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1342 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1343 | return clp; |
1344 | } | |
1345 | return NULL; | |
1346 | } | |
1347 | ||
fd39ca9a | 1348 | static void |
6f3d772f | 1349 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1350 | { |
07263f1e | 1351 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1352 | struct sockaddr *sa = svc_addr(rqstp); |
1353 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1354 | unsigned short expected_family; |
1355 | ||
1356 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1357 | if (se->se_callback_netid_len == 3 && | |
1358 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1359 | expected_family = AF_INET; | |
1360 | else if (se->se_callback_netid_len == 4 && | |
1361 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1362 | expected_family = AF_INET6; | |
1363 | else | |
1da177e4 LT |
1364 | goto out_err; |
1365 | ||
f2ac4dc9 | 1366 | conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, |
aa9a4ec7 | 1367 | se->se_callback_addr_len, |
07263f1e BF |
1368 | (struct sockaddr *)&conn->cb_addr, |
1369 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1370 | |
07263f1e | 1371 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1372 | goto out_err; |
aa9a4ec7 | 1373 | |
07263f1e BF |
1374 | if (conn->cb_addr.ss_family == AF_INET6) |
1375 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1376 | |
07263f1e BF |
1377 | conn->cb_prog = se->se_callback_prog; |
1378 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1379 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1380 | return; |
1381 | out_err: | |
07263f1e BF |
1382 | conn->cb_addr.ss_family = AF_UNSPEC; |
1383 | conn->cb_addrlen = 0; | |
849823c5 | 1384 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1385 | "will not receive delegations\n", |
1386 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1387 | ||
1da177e4 LT |
1388 | return; |
1389 | } | |
1390 | ||
074fe897 | 1391 | /* |
557ce264 | 1392 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1393 | */ |
074fe897 AA |
1394 | void |
1395 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1396 | { |
557ce264 AA |
1397 | struct nfsd4_slot *slot = resp->cstate.slot; |
1398 | unsigned int base; | |
074fe897 | 1399 | |
557ce264 | 1400 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1401 | |
557ce264 AA |
1402 | slot->sl_opcnt = resp->opcnt; |
1403 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1404 | |
bf5c43c8 | 1405 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1406 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1407 | slot->sl_datalen = 0; |
bf864a31 | 1408 | return; |
074fe897 | 1409 | } |
557ce264 AA |
1410 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1411 | base = (char *)resp->cstate.datap - | |
1412 | (char *)resp->xbuf->head[0].iov_base; | |
1413 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1414 | slot->sl_datalen)) | |
1415 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1416 | return; | |
074fe897 AA |
1417 | } |
1418 | ||
1419 | /* | |
abfabf8c AA |
1420 | * Encode the replay sequence operation from the slot values. |
1421 | * If cachethis is FALSE encode the uncached rep error on the next | |
1422 | * operation which sets resp->p and increments resp->opcnt for | |
1423 | * nfs4svc_encode_compoundres. | |
074fe897 | 1424 | * |
074fe897 | 1425 | */ |
abfabf8c AA |
1426 | static __be32 |
1427 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1428 | struct nfsd4_compoundres *resp) | |
074fe897 | 1429 | { |
abfabf8c AA |
1430 | struct nfsd4_op *op; |
1431 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1432 | |
abfabf8c AA |
1433 | /* Encode the replayed sequence operation */ |
1434 | op = &args->ops[resp->opcnt - 1]; | |
1435 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1436 | |
abfabf8c | 1437 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1438 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1439 | op = &args->ops[resp->opcnt++]; |
1440 | op->status = nfserr_retry_uncached_rep; | |
1441 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1442 | } |
abfabf8c | 1443 | return op->status; |
074fe897 AA |
1444 | } |
1445 | ||
1446 | /* | |
557ce264 AA |
1447 | * The sequence operation is not cached because we can use the slot and |
1448 | * session values. | |
074fe897 AA |
1449 | */ |
1450 | __be32 | |
bf864a31 AA |
1451 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1452 | struct nfsd4_sequence *seq) | |
074fe897 | 1453 | { |
557ce264 | 1454 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1455 | __be32 status; |
1456 | ||
557ce264 | 1457 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1458 | |
abfabf8c AA |
1459 | /* Either returns 0 or nfserr_retry_uncached */ |
1460 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1461 | if (status == nfserr_retry_uncached_rep) | |
1462 | return status; | |
074fe897 | 1463 | |
557ce264 AA |
1464 | /* The sequence operation has been encoded, cstate->datap set. */ |
1465 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1466 | |
557ce264 AA |
1467 | resp->opcnt = slot->sl_opcnt; |
1468 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1469 | status = slot->sl_status; | |
074fe897 AA |
1470 | |
1471 | return status; | |
1472 | } | |
1473 | ||
0733d213 AA |
1474 | /* |
1475 | * Set the exchange_id flags returned by the server. | |
1476 | */ | |
1477 | static void | |
1478 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1479 | { | |
1480 | /* pNFS is not supported */ | |
1481 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1482 | ||
1483 | /* Referrals are supported, Migration is not. */ | |
1484 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1485 | ||
1486 | /* set the wire flags to return to client. */ | |
1487 | clid->flags = new->cl_exchange_flags; | |
1488 | } | |
1489 | ||
069b6ad4 AA |
1490 | __be32 |
1491 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1492 | struct nfsd4_compound_state *cstate, | |
1493 | struct nfsd4_exchange_id *exid) | |
1494 | { | |
0733d213 | 1495 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1496 | __be32 status; |
0733d213 AA |
1497 | unsigned int strhashval; |
1498 | char dname[HEXDIR_LEN]; | |
363168b4 | 1499 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1500 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1501 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1502 | |
363168b4 | 1503 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1504 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1505 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1506 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1507 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1508 | |
a084daf5 | 1509 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1510 | return nfserr_inval; |
1511 | ||
1512 | /* Currently only support SP4_NONE */ | |
1513 | switch (exid->spa_how) { | |
1514 | case SP4_NONE: | |
1515 | break; | |
1516 | case SP4_SSV: | |
044bc1d4 | 1517 | return nfserr_serverfault; |
0733d213 AA |
1518 | default: |
1519 | BUG(); /* checked by xdr code */ | |
1520 | case SP4_MACH_CRED: | |
1521 | return nfserr_serverfault; /* no excuse :-/ */ | |
1522 | } | |
1523 | ||
1524 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1525 | ||
1526 | if (status) | |
1527 | goto error; | |
1528 | ||
1529 | strhashval = clientstr_hashval(dname); | |
1530 | ||
1531 | nfs4_lock_state(); | |
1532 | status = nfs_ok; | |
1533 | ||
e203d506 | 1534 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1535 | if (conf) { |
e203d506 BF |
1536 | if (!clp_used_exchangeid(conf)) { |
1537 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1538 | goto out; | |
1539 | } | |
0733d213 AA |
1540 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1541 | /* 18.35.4 case 8 */ | |
1542 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1543 | status = nfserr_not_same; | |
1544 | goto out; | |
1545 | } | |
1546 | /* Client reboot: destroy old state */ | |
1547 | expire_client(conf); | |
1548 | goto out_new; | |
1549 | } | |
1550 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1551 | /* 18.35.4 case 9 */ | |
1552 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1553 | status = nfserr_perm; | |
1554 | goto out; | |
1555 | } | |
1556 | expire_client(conf); | |
1557 | goto out_new; | |
1558 | } | |
0733d213 AA |
1559 | /* |
1560 | * Set bit when the owner id and verifier map to an already | |
1561 | * confirmed client id (18.35.3). | |
1562 | */ | |
1563 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1564 | ||
1565 | /* | |
1566 | * Falling into 18.35.4 case 2, possible router replay. | |
1567 | * Leave confirmed record intact and return same result. | |
1568 | */ | |
1569 | copy_verf(conf, &verf); | |
1570 | new = conf; | |
1571 | goto out_copy; | |
6ddbbbfe MS |
1572 | } |
1573 | ||
1574 | /* 18.35.4 case 7 */ | |
1575 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1576 | status = nfserr_noent; | |
1577 | goto out; | |
0733d213 AA |
1578 | } |
1579 | ||
e203d506 | 1580 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1581 | if (unconf) { |
1582 | /* | |
1583 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1584 | * a new unconfirmed record should be generated regardless | |
1585 | * of whether any properties have changed. | |
1586 | */ | |
1587 | expire_client(unconf); | |
1588 | } | |
1589 | ||
1590 | out_new: | |
1591 | /* Normal case */ | |
b09333c4 | 1592 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1593 | if (new == NULL) { |
4731030d | 1594 | status = nfserr_jukebox; |
0733d213 AA |
1595 | goto out; |
1596 | } | |
1597 | ||
0733d213 | 1598 | gen_clid(new); |
0733d213 AA |
1599 | add_to_unconfirmed(new, strhashval); |
1600 | out_copy: | |
1601 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1602 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1603 | ||
38eb76a5 | 1604 | exid->seqid = 1; |
0733d213 AA |
1605 | nfsd4_set_ex_flags(new, exid); |
1606 | ||
1607 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1608 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1609 | status = nfs_ok; |
1610 | ||
1611 | out: | |
1612 | nfs4_unlock_state(); | |
1613 | error: | |
1614 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1615 | return status; | |
069b6ad4 AA |
1616 | } |
1617 | ||
57b7b43b | 1618 | static __be32 |
88e588d5 | 1619 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1620 | { |
88e588d5 AA |
1621 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1622 | slot_seqid); | |
b85d4c01 BH |
1623 | |
1624 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1625 | if (slot_inuse) { |
1626 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1627 | return nfserr_jukebox; |
1628 | else | |
1629 | return nfserr_seq_misordered; | |
1630 | } | |
f6d82485 | 1631 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1632 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1633 | return nfs_ok; |
88e588d5 | 1634 | if (seqid == slot_seqid) |
b85d4c01 | 1635 | return nfserr_replay_cache; |
b85d4c01 BH |
1636 | return nfserr_seq_misordered; |
1637 | } | |
1638 | ||
49557cc7 AA |
1639 | /* |
1640 | * Cache the create session result into the create session single DRC | |
1641 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1642 | * Do this for solo or embedded create session operations. | |
1643 | */ | |
1644 | static void | |
1645 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1646 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1647 | { |
1648 | slot->sl_status = nfserr; | |
1649 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1650 | } | |
1651 | ||
1652 | static __be32 | |
1653 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1654 | struct nfsd4_clid_slot *slot) | |
1655 | { | |
1656 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1657 | return slot->sl_status; | |
1658 | } | |
1659 | ||
1b74c25b MJ |
1660 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1661 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1662 | 1 + /* MIN tag is length with zero, only length */ \ | |
1663 | 3 + /* version, opcount, opcode */ \ | |
1664 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1665 | /* seqid, slotID, slotID, cache */ \ | |
1666 | 4 ) * sizeof(__be32)) | |
1667 | ||
1668 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1669 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1670 | 1 + /* status */ \ | |
1671 | 1 + /* MIN tag is length with zero, only length */ \ | |
1672 | 3 + /* opcount, opcode, opstatus*/ \ | |
1673 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1674 | /* seqid, slotID, slotID, slotID, status */ \ | |
1675 | 5 ) * sizeof(__be32)) | |
1676 | ||
57b7b43b | 1677 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1678 | { |
1679 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1680 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1681 | } | |
1682 | ||
069b6ad4 AA |
1683 | __be32 |
1684 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1685 | struct nfsd4_compound_state *cstate, | |
1686 | struct nfsd4_create_session *cr_ses) | |
1687 | { | |
363168b4 | 1688 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1689 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1690 | struct nfsd4_session *new; |
49557cc7 | 1691 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1692 | bool confirm_me = false; |
57b7b43b | 1693 | __be32 status = 0; |
ec6b5d7b | 1694 | |
a62573dc MJ |
1695 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1696 | return nfserr_inval; | |
1697 | ||
ec6b5d7b AA |
1698 | nfs4_lock_state(); |
1699 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1700 | conf = find_confirmed_client(&cr_ses->clientid); | |
1701 | ||
1702 | if (conf) { | |
49557cc7 AA |
1703 | cs_slot = &conf->cl_cs_slot; |
1704 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1705 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1706 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1707 | cs_slot->sl_seqid); |
38eb76a5 | 1708 | /* Return the cached reply status */ |
49557cc7 | 1709 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1710 | goto out; |
49557cc7 | 1711 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1712 | status = nfserr_seq_misordered; |
1713 | dprintk("Sequence misordered!\n"); | |
1714 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1715 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1716 | goto out; |
1717 | } | |
ec6b5d7b AA |
1718 | } else if (unconf) { |
1719 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1720 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1721 | status = nfserr_clid_inuse; |
1722 | goto out; | |
1723 | } | |
1724 | ||
49557cc7 AA |
1725 | cs_slot = &unconf->cl_cs_slot; |
1726 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1727 | if (status) { |
1728 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1729 | status = nfserr_seq_misordered; |
cd5b8144 | 1730 | goto out; |
ec6b5d7b AA |
1731 | } |
1732 | ||
86c3e16c | 1733 | confirm_me = true; |
ec6b5d7b AA |
1734 | conf = unconf; |
1735 | } else { | |
1736 | status = nfserr_stale_clientid; | |
1737 | goto out; | |
1738 | } | |
1739 | ||
8323c3b2 BF |
1740 | /* |
1741 | * XXX: we should probably set this at creation time, and check | |
1742 | * for consistent minorversion use throughout: | |
1743 | */ | |
1744 | conf->cl_minorversion = 1; | |
408b79bc BF |
1745 | /* |
1746 | * We do not support RDMA or persistent sessions | |
1747 | */ | |
1748 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1749 | cr_ses->flags &= ~SESSION4_RDMA; | |
1750 | ||
1b74c25b MJ |
1751 | status = nfserr_toosmall; |
1752 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1753 | goto out; | |
1754 | ||
ac7c46f2 BF |
1755 | status = nfserr_jukebox; |
1756 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1757 | if (!new) | |
ec6b5d7b | 1758 | goto out; |
ac7c46f2 BF |
1759 | status = nfs_ok; |
1760 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1761 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1762 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1763 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1764 | cs_slot->sl_seqid++; |
49557cc7 | 1765 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1766 | |
49557cc7 AA |
1767 | /* cache solo and embedded create sessions under the state lock */ |
1768 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1769 | if (confirm_me) |
1770 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1771 | out: |
1772 | nfs4_unlock_state(); | |
1773 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1774 | return status; | |
069b6ad4 AA |
1775 | } |
1776 | ||
57716355 BF |
1777 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1778 | { | |
1779 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1780 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1781 | ||
1782 | return argp->opcnt == resp->opcnt; | |
1783 | } | |
1784 | ||
1d1bc8f2 BF |
1785 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1786 | { | |
1787 | switch (*dir) { | |
1788 | case NFS4_CDFC4_FORE: | |
1789 | case NFS4_CDFC4_BACK: | |
1790 | return nfs_ok; | |
1791 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1792 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1793 | *dir = NFS4_CDFC4_BOTH; | |
1794 | return nfs_ok; | |
1795 | }; | |
1796 | return nfserr_inval; | |
1797 | } | |
1798 | ||
1799 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1800 | struct nfsd4_compound_state *cstate, | |
1801 | struct nfsd4_bind_conn_to_session *bcts) | |
1802 | { | |
1803 | __be32 status; | |
1804 | ||
1805 | if (!nfsd4_last_compound_op(rqstp)) | |
1806 | return nfserr_not_only_op; | |
1807 | spin_lock(&client_lock); | |
1808 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1809 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1810 | * client_lock iself: */ | |
1811 | if (cstate->session) { | |
1812 | nfsd4_get_session(cstate->session); | |
1813 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1814 | } | |
1815 | spin_unlock(&client_lock); | |
1816 | if (!cstate->session) | |
1817 | return nfserr_badsession; | |
1818 | ||
1819 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1820 | if (!status) |
1821 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1822 | return status; | |
1d1bc8f2 BF |
1823 | } |
1824 | ||
5d4cec2f BF |
1825 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1826 | { | |
1827 | if (!session) | |
1828 | return 0; | |
1829 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1830 | } | |
1831 | ||
069b6ad4 AA |
1832 | __be32 |
1833 | nfsd4_destroy_session(struct svc_rqst *r, | |
1834 | struct nfsd4_compound_state *cstate, | |
1835 | struct nfsd4_destroy_session *sessionid) | |
1836 | { | |
e10e0cfc | 1837 | struct nfsd4_session *ses; |
57b7b43b | 1838 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1839 | |
1840 | /* Notes: | |
1841 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1842 | * - Should we return nfserr_back_chan_busy if waiting for | |
1843 | * callbacks on to-be-destroyed session? | |
1844 | * - Do we need to clear any callback info from previous session? | |
1845 | */ | |
1846 | ||
5d4cec2f | 1847 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1848 | if (!nfsd4_last_compound_op(r)) |
1849 | return nfserr_not_only_op; | |
1850 | } | |
e10e0cfc | 1851 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1852 | spin_lock(&client_lock); |
e10e0cfc BH |
1853 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1854 | if (!ses) { | |
9089f1b4 | 1855 | spin_unlock(&client_lock); |
e10e0cfc BH |
1856 | goto out; |
1857 | } | |
1858 | ||
1859 | unhash_session(ses); | |
9089f1b4 | 1860 | spin_unlock(&client_lock); |
e10e0cfc | 1861 | |
ab707e15 | 1862 | nfs4_lock_state(); |
84f5f7cc | 1863 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1864 | nfs4_unlock_state(); |
19cf5c02 | 1865 | |
508dc6e1 | 1866 | spin_lock(&client_lock); |
19cf5c02 | 1867 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1868 | nfsd4_put_session_locked(ses); |
1869 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1870 | status = nfs_ok; |
1871 | out: | |
1872 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1873 | return status; | |
069b6ad4 AA |
1874 | } |
1875 | ||
a663bdd8 | 1876 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1877 | { |
1878 | struct nfsd4_conn *c; | |
1879 | ||
1880 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1881 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1882 | return c; |
1883 | } | |
1884 | } | |
1885 | return NULL; | |
1886 | } | |
1887 | ||
a663bdd8 | 1888 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1889 | { |
1890 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1891 | struct nfsd4_conn *c; |
21b75b01 | 1892 | int ret; |
328ead28 BF |
1893 | |
1894 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1895 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1896 | if (c) { |
1897 | spin_unlock(&clp->cl_lock); | |
1898 | free_conn(new); | |
1899 | return; | |
1900 | } | |
1901 | __nfsd4_hash_conn(new, ses); | |
1902 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1903 | ret = nfsd4_register_conn(new); |
1904 | if (ret) | |
1905 | /* oops; xprt is already down: */ | |
1906 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1907 | return; |
1908 | } | |
1909 | ||
868b89c3 MJ |
1910 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1911 | { | |
1912 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1913 | ||
1914 | return args->opcnt > session->se_fchannel.maxops; | |
1915 | } | |
1916 | ||
ae82a8d0 MJ |
1917 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1918 | struct nfsd4_session *session) | |
1919 | { | |
1920 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1921 | ||
1922 | return xb->len > session->se_fchannel.maxreq_sz; | |
1923 | } | |
1924 | ||
069b6ad4 | 1925 | __be32 |
b85d4c01 | 1926 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1927 | struct nfsd4_compound_state *cstate, |
1928 | struct nfsd4_sequence *seq) | |
1929 | { | |
f9bb94c4 | 1930 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1931 | struct nfsd4_session *session; |
1932 | struct nfsd4_slot *slot; | |
a663bdd8 | 1933 | struct nfsd4_conn *conn; |
57b7b43b | 1934 | __be32 status; |
b85d4c01 | 1935 | |
f9bb94c4 AA |
1936 | if (resp->opcnt != 1) |
1937 | return nfserr_sequence_pos; | |
1938 | ||
a663bdd8 BF |
1939 | /* |
1940 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1941 | * below. | |
1942 | */ | |
1943 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1944 | if (!conn) | |
1945 | return nfserr_jukebox; | |
1946 | ||
9089f1b4 | 1947 | spin_lock(&client_lock); |
b85d4c01 BH |
1948 | status = nfserr_badsession; |
1949 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1950 | if (!session) | |
1951 | goto out; | |
1952 | ||
868b89c3 MJ |
1953 | status = nfserr_too_many_ops; |
1954 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1955 | goto out; | |
1956 | ||
ae82a8d0 MJ |
1957 | status = nfserr_req_too_big; |
1958 | if (nfsd4_request_too_big(rqstp, session)) | |
1959 | goto out; | |
1960 | ||
b85d4c01 | 1961 | status = nfserr_badslot; |
6c18ba9f | 1962 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1963 | goto out; |
1964 | ||
557ce264 | 1965 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1966 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1967 | ||
a8dfdaeb AA |
1968 | /* We do not negotiate the number of slots yet, so set the |
1969 | * maxslots to the session maxreqs which is used to encode | |
1970 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1971 | seq->maxslots = session->se_fchannel.maxreqs; | |
1972 | ||
73e79482 BF |
1973 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
1974 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 1975 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
1976 | status = nfserr_seq_misordered; |
1977 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
1978 | goto out; | |
b85d4c01 BH |
1979 | cstate->slot = slot; |
1980 | cstate->session = session; | |
da3846a2 | 1981 | /* Return the cached reply status and set cstate->status |
557ce264 | 1982 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1983 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1984 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1985 | goto out; |
b85d4c01 BH |
1986 | } |
1987 | if (status) | |
1988 | goto out; | |
1989 | ||
a663bdd8 BF |
1990 | nfsd4_sequence_check_conn(conn, session); |
1991 | conn = NULL; | |
328ead28 | 1992 | |
b85d4c01 | 1993 | /* Success! bump slot seqid */ |
b85d4c01 | 1994 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 1995 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
1996 | if (seq->cachethis) |
1997 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
1998 | else |
1999 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2000 | |
2001 | cstate->slot = slot; | |
2002 | cstate->session = session; | |
2003 | ||
b85d4c01 | 2004 | out: |
26c0c75e | 2005 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2006 | if (cstate->session) { |
0d7bb719 BF |
2007 | struct nfs4_client *clp = session->se_client; |
2008 | ||
36acb66b | 2009 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2010 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2011 | switch (clp->cl_cb_state) { |
2012 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2013 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2014 | break; |
2015 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2016 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2017 | break; |
fc0c3dd1 BH |
2018 | default: |
2019 | seq->status_flags = 0; | |
5423732a | 2020 | } |
aaf84eb9 | 2021 | } |
a663bdd8 | 2022 | kfree(conn); |
36acb66b | 2023 | spin_unlock(&client_lock); |
b85d4c01 BH |
2024 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2025 | return status; | |
069b6ad4 AA |
2026 | } |
2027 | ||
345c2842 MJ |
2028 | static inline bool has_resources(struct nfs4_client *clp) |
2029 | { | |
2030 | return !list_empty(&clp->cl_openowners) | |
2031 | || !list_empty(&clp->cl_delegations) | |
2032 | || !list_empty(&clp->cl_sessions); | |
2033 | } | |
2034 | ||
2035 | __be32 | |
2036 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2037 | { | |
2038 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2039 | __be32 status = 0; |
345c2842 MJ |
2040 | |
2041 | nfs4_lock_state(); | |
2042 | unconf = find_unconfirmed_client(&dc->clientid); | |
2043 | conf = find_confirmed_client(&dc->clientid); | |
2044 | ||
2045 | if (conf) { | |
2046 | clp = conf; | |
2047 | ||
2048 | if (!is_client_expired(conf) && has_resources(conf)) { | |
2049 | status = nfserr_clientid_busy; | |
2050 | goto out; | |
2051 | } | |
2052 | ||
2053 | /* rfc5661 18.50.3 */ | |
2054 | if (cstate->session && conf == cstate->session->se_client) { | |
2055 | status = nfserr_clientid_busy; | |
2056 | goto out; | |
2057 | } | |
2058 | } else if (unconf) | |
2059 | clp = unconf; | |
2060 | else { | |
2061 | status = nfserr_stale_clientid; | |
2062 | goto out; | |
2063 | } | |
2064 | ||
2065 | expire_client(clp); | |
2066 | out: | |
2067 | nfs4_unlock_state(); | |
2068 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2069 | return status; | |
2070 | } | |
2071 | ||
4dc6ec00 BF |
2072 | __be32 |
2073 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2074 | { | |
57b7b43b | 2075 | __be32 status = 0; |
bcecf1cc | 2076 | |
4dc6ec00 BF |
2077 | if (rc->rca_one_fs) { |
2078 | if (!cstate->current_fh.fh_dentry) | |
2079 | return nfserr_nofilehandle; | |
2080 | /* | |
2081 | * We don't take advantage of the rca_one_fs case. | |
2082 | * That's OK, it's optional, we can safely ignore it. | |
2083 | */ | |
2084 | return nfs_ok; | |
2085 | } | |
bcecf1cc | 2086 | |
4dc6ec00 | 2087 | nfs4_lock_state(); |
bcecf1cc | 2088 | status = nfserr_complete_already; |
a52d726b JL |
2089 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2090 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2091 | goto out; |
2092 | ||
2093 | status = nfserr_stale_clientid; | |
2094 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2095 | /* |
2096 | * The following error isn't really legal. | |
2097 | * But we only get here if the client just explicitly | |
2098 | * destroyed the client. Surely it no longer cares what | |
2099 | * error it gets back on an operation for the dead | |
2100 | * client. | |
2101 | */ | |
bcecf1cc MJ |
2102 | goto out; |
2103 | ||
2104 | status = nfs_ok; | |
2a4317c5 | 2105 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2106 | out: |
4dc6ec00 | 2107 | nfs4_unlock_state(); |
bcecf1cc | 2108 | return status; |
4dc6ec00 BF |
2109 | } |
2110 | ||
b37ad28b | 2111 | __be32 |
b591480b BF |
2112 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2113 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2114 | { |
a084daf5 | 2115 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
2116 | nfs4_verifier clverifier = setclid->se_verf; |
2117 | unsigned int strhashval; | |
28ce6054 | 2118 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2119 | __be32 status; |
a55370a3 | 2120 | char dname[HEXDIR_LEN]; |
1da177e4 | 2121 | |
a55370a3 N |
2122 | status = nfs4_make_rec_clidname(dname, &clname); |
2123 | if (status) | |
73aea4ec | 2124 | return status; |
a55370a3 | 2125 | |
1da177e4 LT |
2126 | /* |
2127 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2128 | * We get here on a DRC miss. | |
2129 | */ | |
2130 | ||
a55370a3 | 2131 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2132 | |
1da177e4 | 2133 | nfs4_lock_state(); |
e203d506 | 2134 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2135 | if (conf) { |
a186e767 | 2136 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 2137 | status = nfserr_clid_inuse; |
e203d506 BF |
2138 | if (clp_used_exchangeid(conf)) |
2139 | goto out; | |
026722c2 | 2140 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2141 | char addr_str[INET6_ADDRSTRLEN]; |
2142 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2143 | sizeof(addr_str)); | |
2144 | dprintk("NFSD: setclientid: string in use by client " | |
2145 | "at %s\n", addr_str); | |
1da177e4 LT |
2146 | goto out; |
2147 | } | |
1da177e4 | 2148 | } |
a186e767 BF |
2149 | /* |
2150 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2151 | * has a description of SETCLIENTID request processing consisting | |
2152 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2153 | */ | |
e203d506 | 2154 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2155 | status = nfserr_jukebox; |
1da177e4 | 2156 | if (!conf) { |
a186e767 BF |
2157 | /* |
2158 | * RFC 3530 14.2.33 CASE 4: | |
2159 | * placed first, because it is the normal case | |
1da177e4 LT |
2160 | */ |
2161 | if (unconf) | |
2162 | expire_client(unconf); | |
b09333c4 | 2163 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2164 | if (new == NULL) |
1da177e4 | 2165 | goto out; |
1da177e4 | 2166 | gen_clid(new); |
599e0a22 | 2167 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2168 | /* |
a186e767 BF |
2169 | * RFC 3530 14.2.33 CASE 1: |
2170 | * probable callback update | |
1da177e4 | 2171 | */ |
31f4a6c1 N |
2172 | if (unconf) { |
2173 | /* Note this is removing unconfirmed {*x***}, | |
2174 | * which is stronger than RFC recommended {vxc**}. | |
2175 | * This has the advantage that there is at most | |
2176 | * one {*x***} in either list at any time. | |
2177 | */ | |
2178 | expire_client(unconf); | |
1da177e4 | 2179 | } |
b09333c4 | 2180 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2181 | if (new == NULL) |
1da177e4 | 2182 | goto out; |
1da177e4 | 2183 | copy_clid(new, conf); |
1da177e4 LT |
2184 | } else if (!unconf) { |
2185 | /* | |
a186e767 BF |
2186 | * RFC 3530 14.2.33 CASE 2: |
2187 | * probable client reboot; state will be removed if | |
2188 | * confirmed. | |
1da177e4 | 2189 | */ |
b09333c4 | 2190 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2191 | if (new == NULL) |
1da177e4 | 2192 | goto out; |
1da177e4 | 2193 | gen_clid(new); |
49ba8781 | 2194 | } else { |
a186e767 BF |
2195 | /* |
2196 | * RFC 3530 14.2.33 CASE 3: | |
2197 | * probable client reboot; state will be removed if | |
2198 | * confirmed. | |
1da177e4 LT |
2199 | */ |
2200 | expire_client(unconf); | |
b09333c4 | 2201 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2202 | if (new == NULL) |
1da177e4 | 2203 | goto out; |
1da177e4 | 2204 | gen_clid(new); |
1da177e4 | 2205 | } |
8323c3b2 BF |
2206 | /* |
2207 | * XXX: we should probably set this at creation time, and check | |
2208 | * for consistent minorversion use throughout: | |
2209 | */ | |
2210 | new->cl_minorversion = 0; | |
6f3d772f | 2211 | gen_callback(new, setclid, rqstp); |
c175b83c | 2212 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2213 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2214 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2215 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2216 | status = nfs_ok; | |
2217 | out: | |
2218 | nfs4_unlock_state(); | |
2219 | return status; | |
2220 | } | |
2221 | ||
2222 | ||
2223 | /* | |
a186e767 BF |
2224 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2225 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2226 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2227 | */ |
b37ad28b | 2228 | __be32 |
b591480b BF |
2229 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2230 | struct nfsd4_compound_state *cstate, | |
2231 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2232 | { |
21ab45a4 | 2233 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2234 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2235 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2236 | __be32 status; |
1da177e4 LT |
2237 | |
2238 | if (STALE_CLIENTID(clid)) | |
2239 | return nfserr_stale_clientid; | |
2240 | /* | |
2241 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2242 | * We get here on a DRC miss. | |
2243 | */ | |
2244 | ||
2245 | nfs4_lock_state(); | |
21ab45a4 N |
2246 | |
2247 | conf = find_confirmed_client(clid); | |
2248 | unconf = find_unconfirmed_client(clid); | |
2249 | ||
a186e767 BF |
2250 | /* |
2251 | * section 14.2.34 of RFC 3530 has a description of | |
2252 | * SETCLIENTID_CONFIRM request processing consisting | |
2253 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2254 | */ | |
f07ea10d | 2255 | status = nfserr_clid_inuse; |
366e0c1d | 2256 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2257 | /* |
2258 | * RFC 3530 14.2.34 CASE 1: | |
2259 | * callback update | |
2260 | */ | |
599e0a22 | 2261 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2262 | status = nfserr_clid_inuse; |
2263 | else { | |
5a3c9d71 BF |
2264 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2265 | nfsd4_probe_callback(conf); | |
1a69c179 | 2266 | expire_client(unconf); |
1da177e4 LT |
2267 | status = nfs_ok; |
2268 | } | |
f3aba4e5 | 2269 | } else if (conf && !unconf) { |
a186e767 BF |
2270 | /* |
2271 | * RFC 3530 14.2.34 CASE 2: | |
2272 | * probable retransmitted request; play it safe and | |
2273 | * do nothing. | |
7c79f737 | 2274 | */ |
599e0a22 | 2275 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2276 | status = nfserr_clid_inuse; |
21ab45a4 | 2277 | else |
1da177e4 | 2278 | status = nfs_ok; |
7c79f737 | 2279 | } else if (!conf && unconf |
599e0a22 | 2280 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2281 | /* |
2282 | * RFC 3530 14.2.34 CASE 3: | |
2283 | * Normal case; new or rebooted client: | |
7c79f737 | 2284 | */ |
599e0a22 | 2285 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2286 | status = nfserr_clid_inuse; |
2287 | } else { | |
1a69c179 N |
2288 | unsigned int hash = |
2289 | clientstr_hashval(unconf->cl_recdir); | |
2290 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2291 | hash); |
1a69c179 | 2292 | if (conf) { |
2a4317c5 | 2293 | nfsd4_client_record_remove(conf); |
1a69c179 N |
2294 | expire_client(conf); |
2295 | } | |
1da177e4 | 2296 | move_to_confirmed(unconf); |
21ab45a4 | 2297 | conf = unconf; |
5a3c9d71 | 2298 | nfsd4_probe_callback(conf); |
1a69c179 | 2299 | status = nfs_ok; |
1da177e4 | 2300 | } |
599e0a22 BF |
2301 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2302 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2303 | &confirm)))) { |
a186e767 BF |
2304 | /* |
2305 | * RFC 3530 14.2.34 CASE 4: | |
2306 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2307 | */ |
1da177e4 | 2308 | status = nfserr_stale_clientid; |
08e8987c | 2309 | } |
f07ea10d | 2310 | |
1da177e4 LT |
2311 | nfs4_unlock_state(); |
2312 | return status; | |
2313 | } | |
2314 | ||
32513b40 BF |
2315 | static struct nfs4_file *nfsd4_alloc_file(void) |
2316 | { | |
2317 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2318 | } | |
2319 | ||
1da177e4 | 2320 | /* OPEN Share state helper functions */ |
32513b40 | 2321 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2322 | { |
1da177e4 LT |
2323 | unsigned int hashval = file_hashval(ino); |
2324 | ||
32513b40 BF |
2325 | atomic_set(&fp->fi_ref, 1); |
2326 | INIT_LIST_HEAD(&fp->fi_hash); | |
2327 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2328 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2329 | fp->fi_inode = igrab(ino); | |
2330 | fp->fi_had_conflict = false; | |
2331 | fp->fi_lease = NULL; | |
2332 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2333 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2334 | spin_lock(&recall_lock); | |
2335 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2336 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2337 | } |
2338 | ||
e60d4398 | 2339 | static void |
e18b890b | 2340 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2341 | { |
e60d4398 N |
2342 | if (*slab == NULL) |
2343 | return; | |
1a1d92c1 | 2344 | kmem_cache_destroy(*slab); |
e60d4398 | 2345 | *slab = NULL; |
1da177e4 LT |
2346 | } |
2347 | ||
e8ff2a84 | 2348 | void |
1da177e4 LT |
2349 | nfsd4_free_slabs(void) |
2350 | { | |
fe0750e5 BF |
2351 | nfsd4_free_slab(&openowner_slab); |
2352 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2353 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2354 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2355 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2356 | } |
1da177e4 | 2357 | |
72083396 | 2358 | int |
e60d4398 N |
2359 | nfsd4_init_slabs(void) |
2360 | { | |
fe0750e5 BF |
2361 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2362 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2363 | if (openowner_slab == NULL) | |
2364 | goto out_nomem; | |
2365 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2366 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2367 | if (lockowner_slab == NULL) | |
e60d4398 N |
2368 | goto out_nomem; |
2369 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2370 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2371 | if (file_slab == NULL) |
2372 | goto out_nomem; | |
5ac049ac | 2373 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2374 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2375 | if (stateid_slab == NULL) |
2376 | goto out_nomem; | |
5b2d21c1 | 2377 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2378 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2379 | if (deleg_slab == NULL) |
2380 | goto out_nomem; | |
e60d4398 N |
2381 | return 0; |
2382 | out_nomem: | |
2383 | nfsd4_free_slabs(); | |
2384 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2385 | return -ENOMEM; | |
1da177e4 LT |
2386 | } |
2387 | ||
fe0750e5 BF |
2388 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2389 | { | |
2390 | kfree(oo->oo_owner.so_owner.data); | |
2391 | kmem_cache_free(openowner_slab, oo); | |
2392 | } | |
2393 | ||
2394 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2395 | { |
fe0750e5 BF |
2396 | kfree(lo->lo_owner.so_owner.data); |
2397 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2398 | } |
2399 | ||
ff194bd9 | 2400 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2401 | { |
ff194bd9 BF |
2402 | rp->rp_status = nfserr_serverfault; |
2403 | rp->rp_buflen = 0; | |
2404 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2405 | } |
2406 | ||
fe0750e5 | 2407 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2408 | { |
1da177e4 | 2409 | struct nfs4_stateowner *sop; |
1da177e4 | 2410 | |
fe0750e5 | 2411 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2412 | if (!sop) |
2413 | return NULL; | |
2414 | ||
2415 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2416 | if (!sop->so_owner.data) { | |
fe0750e5 | 2417 | kmem_cache_free(slab, sop); |
1da177e4 | 2418 | return NULL; |
ff194bd9 BF |
2419 | } |
2420 | sop->so_owner.len = owner->len; | |
2421 | ||
ea1da636 | 2422 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2423 | sop->so_client = clp; |
2424 | init_nfs4_replay(&sop->so_replay); | |
2425 | return sop; | |
2426 | } | |
2427 | ||
fe0750e5 | 2428 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2429 | { |
16bfdaaf | 2430 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2431 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2432 | } |
2433 | ||
fe0750e5 | 2434 | static struct nfs4_openowner * |
ff194bd9 | 2435 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2436 | struct nfs4_openowner *oo; |
ff194bd9 | 2437 | |
fe0750e5 BF |
2438 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2439 | if (!oo) | |
ff194bd9 | 2440 | return NULL; |
fe0750e5 BF |
2441 | oo->oo_owner.so_is_open_owner = 1; |
2442 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2443 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2444 | oo->oo_time = 0; |
38c387b5 | 2445 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2446 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2447 | hash_openowner(oo, clp, strhashval); | |
2448 | return oo; | |
1da177e4 LT |
2449 | } |
2450 | ||
996e0938 | 2451 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2452 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2453 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2454 | |
996e0938 | 2455 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2456 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2457 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2458 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2459 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2460 | get_nfs4_file(fp); |
1da177e4 | 2461 | stp->st_file = fp; |
1da177e4 LT |
2462 | stp->st_access_bmap = 0; |
2463 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2464 | set_access(open->op_share_access, stp); |
1da177e4 | 2465 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2466 | stp->st_openstp = NULL; |
1da177e4 LT |
2467 | } |
2468 | ||
fd39ca9a | 2469 | static void |
fe0750e5 | 2470 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2471 | { |
fe0750e5 | 2472 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2473 | |
fe0750e5 BF |
2474 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2475 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2476 | } |
2477 | ||
1da177e4 | 2478 | static int |
599e0a22 BF |
2479 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2480 | clientid_t *clid) | |
2481 | { | |
2482 | return (sop->so_owner.len == owner->len) && | |
2483 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2484 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2485 | } |
2486 | ||
fe0750e5 | 2487 | static struct nfs4_openowner * |
1da177e4 LT |
2488 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2489 | { | |
a50d2ad1 BF |
2490 | struct nfs4_stateowner *so; |
2491 | struct nfs4_openowner *oo; | |
1da177e4 | 2492 | |
16bfdaaf BF |
2493 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2494 | if (!so->so_is_open_owner) | |
2495 | continue; | |
a50d2ad1 BF |
2496 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2497 | oo = openowner(so); | |
2498 | renew_client(oo->oo_owner.so_client); | |
2499 | return oo; | |
2500 | } | |
1da177e4 LT |
2501 | } |
2502 | return NULL; | |
2503 | } | |
2504 | ||
2505 | /* search file_hashtbl[] for file */ | |
2506 | static struct nfs4_file * | |
2507 | find_file(struct inode *ino) | |
2508 | { | |
2509 | unsigned int hashval = file_hashval(ino); | |
2510 | struct nfs4_file *fp; | |
2511 | ||
8b671b80 | 2512 | spin_lock(&recall_lock); |
1da177e4 | 2513 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2514 | if (fp->fi_inode == ino) { |
2515 | get_nfs4_file(fp); | |
8b671b80 | 2516 | spin_unlock(&recall_lock); |
1da177e4 | 2517 | return fp; |
13cd2184 | 2518 | } |
1da177e4 | 2519 | } |
8b671b80 | 2520 | spin_unlock(&recall_lock); |
1da177e4 LT |
2521 | return NULL; |
2522 | } | |
2523 | ||
1da177e4 LT |
2524 | /* |
2525 | * Called to check deny when READ with all zero stateid or | |
2526 | * WRITE with all zero or all one stateid | |
2527 | */ | |
b37ad28b | 2528 | static __be32 |
1da177e4 LT |
2529 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2530 | { | |
2531 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2532 | struct nfs4_file *fp; | |
dcef0413 | 2533 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2534 | __be32 ret; |
1da177e4 LT |
2535 | |
2536 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2537 | ||
2538 | fp = find_file(ino); | |
13cd2184 N |
2539 | if (!fp) |
2540 | return nfs_ok; | |
b700949b | 2541 | ret = nfserr_locked; |
1da177e4 | 2542 | /* Search for conflicting share reservations */ |
13cd2184 N |
2543 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2544 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2545 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2546 | goto out; | |
1da177e4 | 2547 | } |
13cd2184 N |
2548 | ret = nfs_ok; |
2549 | out: | |
2550 | put_nfs4_file(fp); | |
2551 | return ret; | |
1da177e4 LT |
2552 | } |
2553 | ||
6b57d9c8 | 2554 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2555 | { |
1da177e4 LT |
2556 | /* We're assuming the state code never drops its reference |
2557 | * without first removing the lease. Since we're in this lease | |
2558 | * callback (and since the lease code is serialized by the kernel | |
2559 | * lock) we know the server hasn't removed the lease yet, we know | |
2560 | * it's safe to take a reference: */ | |
2561 | atomic_inc(&dp->dl_count); | |
2562 | ||
1da177e4 | 2563 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2564 | |
460781b5 | 2565 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2566 | dp->dl_time = get_seconds(); |
2567 | ||
6b57d9c8 BF |
2568 | nfsd4_cb_recall(dp); |
2569 | } | |
2570 | ||
acfdf5c3 | 2571 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2572 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2573 | { | |
acfdf5c3 BF |
2574 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2575 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2576 | |
acfdf5c3 BF |
2577 | BUG_ON(!fp); |
2578 | /* We assume break_lease is only called once per lease: */ | |
2579 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2580 | /* |
2581 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2582 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2583 | * in time: |
0272e1fd BF |
2584 | */ |
2585 | fl->fl_break_time = 0; | |
1da177e4 | 2586 | |
5d926e8c | 2587 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2588 | fp->fi_had_conflict = true; |
2589 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2590 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2591 | spin_unlock(&recall_lock); |
1da177e4 LT |
2592 | } |
2593 | ||
1da177e4 LT |
2594 | static |
2595 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2596 | { | |
2597 | if (arg & F_UNLCK) | |
2598 | return lease_modify(onlist, arg); | |
2599 | else | |
2600 | return -EAGAIN; | |
2601 | } | |
2602 | ||
7b021967 | 2603 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2604 | .lm_break = nfsd_break_deleg_cb, |
2605 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2606 | }; |
2607 | ||
7a8711c9 BF |
2608 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2609 | { | |
2610 | if (nfsd4_has_session(cstate)) | |
2611 | return nfs_ok; | |
2612 | if (seqid == so->so_seqid - 1) | |
2613 | return nfserr_replay_me; | |
2614 | if (seqid == so->so_seqid) | |
2615 | return nfs_ok; | |
2616 | return nfserr_bad_seqid; | |
2617 | } | |
1da177e4 | 2618 | |
b37ad28b | 2619 | __be32 |
6668958f AA |
2620 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2621 | struct nfsd4_open *open) | |
1da177e4 | 2622 | { |
1da177e4 LT |
2623 | clientid_t *clientid = &open->op_clientid; |
2624 | struct nfs4_client *clp = NULL; | |
2625 | unsigned int strhashval; | |
fe0750e5 | 2626 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2627 | __be32 status; |
1da177e4 | 2628 | |
1da177e4 LT |
2629 | if (STALE_CLIENTID(&open->op_clientid)) |
2630 | return nfserr_stale_clientid; | |
32513b40 BF |
2631 | /* |
2632 | * In case we need it later, after we've already created the | |
2633 | * file and don't want to risk a further failure: | |
2634 | */ | |
2635 | open->op_file = nfsd4_alloc_file(); | |
2636 | if (open->op_file == NULL) | |
2637 | return nfserr_jukebox; | |
1da177e4 | 2638 | |
16bfdaaf | 2639 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2640 | oo = find_openstateowner_str(strhashval, open); |
2641 | open->op_openowner = oo; | |
2642 | if (!oo) { | |
1da177e4 LT |
2643 | clp = find_confirmed_client(clientid); |
2644 | if (clp == NULL) | |
0f442aa2 | 2645 | return nfserr_expired; |
bcf130f9 | 2646 | goto new_owner; |
1da177e4 | 2647 | } |
dad1c067 | 2648 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2649 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2650 | clp = oo->oo_owner.so_client; |
2651 | release_openowner(oo); | |
2652 | open->op_openowner = NULL; | |
bcf130f9 | 2653 | goto new_owner; |
0f442aa2 | 2654 | } |
4cdc951b BF |
2655 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2656 | if (status) | |
2657 | return status; | |
2658 | clp = oo->oo_owner.so_client; | |
2659 | goto alloc_stateid; | |
bcf130f9 BF |
2660 | new_owner: |
2661 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2662 | if (oo == NULL) | |
2663 | return nfserr_jukebox; | |
2664 | open->op_openowner = oo; | |
4cdc951b BF |
2665 | alloc_stateid: |
2666 | open->op_stp = nfs4_alloc_stateid(clp); | |
2667 | if (!open->op_stp) | |
2668 | return nfserr_jukebox; | |
0f442aa2 | 2669 | return nfs_ok; |
1da177e4 LT |
2670 | } |
2671 | ||
b37ad28b | 2672 | static inline __be32 |
4a6e43e6 N |
2673 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2674 | { | |
2675 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2676 | return nfserr_openmode; | |
2677 | else | |
2678 | return nfs_ok; | |
2679 | } | |
2680 | ||
f459e453 | 2681 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2682 | { |
f459e453 | 2683 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2684 | } |
2685 | ||
38c2f4b1 | 2686 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2687 | { |
f459e453 | 2688 | struct nfs4_stid *ret; |
24a0111e | 2689 | |
38c2f4b1 | 2690 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2691 | if (!ret) |
2692 | return NULL; | |
2693 | return delegstateid(ret); | |
24a0111e BF |
2694 | } |
2695 | ||
8b289b2c BF |
2696 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2697 | { | |
2698 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2699 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2700 | } | |
2701 | ||
b37ad28b | 2702 | static __be32 |
38c2f4b1 | 2703 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2704 | struct nfs4_delegation **dp) |
2705 | { | |
2706 | int flags; | |
b37ad28b | 2707 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2708 | |
38c2f4b1 | 2709 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2710 | if (*dp == NULL) |
c44c5eeb | 2711 | goto out; |
24a0111e | 2712 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2713 | status = nfs4_check_delegmode(*dp, flags); |
2714 | if (status) | |
2715 | *dp = NULL; | |
c44c5eeb | 2716 | out: |
8b289b2c | 2717 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2718 | return nfs_ok; |
2719 | if (status) | |
2720 | return status; | |
dad1c067 | 2721 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2722 | return nfs_ok; |
567d9829 N |
2723 | } |
2724 | ||
b37ad28b | 2725 | static __be32 |
dcef0413 | 2726 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2727 | { |
dcef0413 | 2728 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2729 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2730 | |
8beefa24 | 2731 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2732 | /* ignore lock owners */ |
2733 | if (local->st_stateowner->so_is_open_owner == 0) | |
2734 | continue; | |
2735 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2736 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2737 | *stpp = local; |
2738 | /* check for conflicting share reservations */ | |
2739 | if (!test_share(local, open)) | |
77eaae8d | 2740 | return nfserr_share_denied; |
1da177e4 | 2741 | } |
77eaae8d | 2742 | return nfs_ok; |
1da177e4 LT |
2743 | } |
2744 | ||
996e0938 BF |
2745 | static void nfs4_free_stateid(struct nfs4_ol_stateid *s) |
2746 | { | |
2747 | kmem_cache_free(stateid_slab, s); | |
5ac049ac N |
2748 | } |
2749 | ||
21fb4016 BF |
2750 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2751 | { | |
2752 | int flags = 0; | |
2753 | ||
2754 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2755 | flags |= NFSD_MAY_READ; | |
2756 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2757 | flags |= NFSD_MAY_WRITE; | |
2758 | return flags; | |
2759 | } | |
2760 | ||
0c12eaff CB |
2761 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2762 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2763 | { |
2764 | __be32 status; | |
0c12eaff CB |
2765 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2766 | int access = nfs4_access_to_access(open->op_share_access); | |
2767 | ||
f9d7562f BF |
2768 | if (!fp->fi_fds[oflag]) { |
2769 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2770 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2771 | if (status) |
2772 | return status; | |
2773 | } | |
2774 | nfs4_file_get_access(fp, oflag); | |
2775 | ||
2776 | return nfs_ok; | |
2777 | } | |
2778 | ||
b37ad28b | 2779 | static inline __be32 |
1da177e4 LT |
2780 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2781 | struct nfsd4_open *open) | |
2782 | { | |
2783 | struct iattr iattr = { | |
2784 | .ia_valid = ATTR_SIZE, | |
2785 | .ia_size = 0, | |
2786 | }; | |
2787 | if (!open->op_truncate) | |
2788 | return 0; | |
2789 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2790 | return nfserr_inval; |
1da177e4 LT |
2791 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2792 | } | |
2793 | ||
b37ad28b | 2794 | static __be32 |
dcef0413 | 2795 | 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 | 2796 | { |
b6d2f1ca | 2797 | u32 op_share_access = open->op_share_access; |
7d947842 | 2798 | bool new_access; |
b37ad28b | 2799 | __be32 status; |
1da177e4 | 2800 | |
82c5ff1b | 2801 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2802 | if (new_access) { |
0c12eaff | 2803 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2804 | if (status) |
2805 | return status; | |
6c26d08f | 2806 | } |
1da177e4 LT |
2807 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2808 | if (status) { | |
f9d7562f | 2809 | if (new_access) { |
f197c271 | 2810 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2811 | nfs4_file_put_access(fp, oflag); |
2812 | } | |
1da177e4 LT |
2813 | return status; |
2814 | } | |
2815 | /* remember the open */ | |
82c5ff1b | 2816 | set_access(op_share_access, stp); |
b55e0ba1 | 2817 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2818 | |
2819 | return nfs_ok; | |
2820 | } | |
2821 | ||
2822 | ||
1da177e4 | 2823 | static void |
1255a8f3 | 2824 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2825 | { |
dad1c067 | 2826 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2827 | } |
2828 | ||
14a24e99 BF |
2829 | /* Should we give out recallable state?: */ |
2830 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2831 | { | |
2832 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2833 | return true; | |
2834 | /* | |
2835 | * In the sessions case, since we don't have to establish a | |
2836 | * separate connection for callbacks, we assume it's OK | |
2837 | * until we hear otherwise: | |
2838 | */ | |
2839 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2840 | } | |
2841 | ||
22d38c4c BF |
2842 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2843 | { | |
2844 | struct file_lock *fl; | |
2845 | ||
2846 | fl = locks_alloc_lock(); | |
2847 | if (!fl) | |
2848 | return NULL; | |
2849 | locks_init_lock(fl); | |
2850 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2851 | fl->fl_flags = FL_LEASE; | |
2852 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2853 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2854 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2855 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2856 | return fl; |
2857 | } | |
2858 | ||
edab9782 BF |
2859 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2860 | { | |
acfdf5c3 | 2861 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2862 | struct file_lock *fl; |
2863 | int status; | |
2864 | ||
2865 | fl = nfs4_alloc_init_lease(dp, flag); | |
2866 | if (!fl) | |
2867 | return -ENOMEM; | |
acfdf5c3 | 2868 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2869 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2870 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2871 | if (status) { |
acfdf5c3 | 2872 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2873 | locks_free_lock(fl); |
2874 | return -ENOMEM; | |
2875 | } | |
acfdf5c3 BF |
2876 | fp->fi_lease = fl; |
2877 | fp->fi_deleg_file = fl->fl_file; | |
2878 | get_file(fp->fi_deleg_file); | |
2879 | atomic_set(&fp->fi_delegees, 1); | |
2880 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2881 | return 0; | |
2882 | } | |
2883 | ||
2884 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2885 | { | |
2886 | struct nfs4_file *fp = dp->dl_file; | |
2887 | ||
2888 | if (!fp->fi_lease) | |
2889 | return nfs4_setlease(dp, flag); | |
2890 | spin_lock(&recall_lock); | |
2891 | if (fp->fi_had_conflict) { | |
2892 | spin_unlock(&recall_lock); | |
2893 | return -EAGAIN; | |
2894 | } | |
2895 | atomic_inc(&fp->fi_delegees); | |
2896 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2897 | spin_unlock(&recall_lock); | |
2a74aba7 | 2898 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2899 | return 0; |
2900 | } | |
2901 | ||
4aa8913c BH |
2902 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2903 | { | |
2904 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2905 | if (status == -EAGAIN) | |
2906 | open->op_why_no_deleg = WND4_CONTENTION; | |
2907 | else { | |
2908 | open->op_why_no_deleg = WND4_RESOURCE; | |
2909 | switch (open->op_deleg_want) { | |
2910 | case NFS4_SHARE_WANT_READ_DELEG: | |
2911 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2912 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2913 | break; | |
2914 | case NFS4_SHARE_WANT_CANCEL: | |
2915 | open->op_why_no_deleg = WND4_CANCELLED; | |
2916 | break; | |
2917 | case NFS4_SHARE_WANT_NO_DELEG: | |
2918 | BUG(); /* not supposed to get here */ | |
2919 | } | |
2920 | } | |
2921 | } | |
2922 | ||
1da177e4 LT |
2923 | /* |
2924 | * Attempt to hand out a delegation. | |
2925 | */ | |
2926 | static void | |
dcef0413 | 2927 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2928 | { |
2929 | struct nfs4_delegation *dp; | |
fe0750e5 | 2930 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2931 | int cb_up; |
d24433cd | 2932 | int status = 0, flag = 0; |
1da177e4 | 2933 | |
fe0750e5 | 2934 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2935 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2936 | open->op_recall = 0; |
2937 | switch (open->op_claim_type) { | |
2938 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2939 | if (!cb_up) |
7b190fec N |
2940 | open->op_recall = 1; |
2941 | flag = open->op_delegate_type; | |
2942 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2943 | goto out; | |
2944 | break; | |
2945 | case NFS4_OPEN_CLAIM_NULL: | |
2946 | /* Let's not give out any delegations till everyone's | |
2947 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2948 | if (locks_in_grace()) |
7b190fec | 2949 | goto out; |
dad1c067 | 2950 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2951 | goto out; |
2952 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2953 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2954 | else | |
2955 | flag = NFS4_OPEN_DELEGATE_READ; | |
2956 | break; | |
2957 | default: | |
2958 | goto out; | |
2959 | } | |
1da177e4 | 2960 | |
fe0750e5 | 2961 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2962 | if (dp == NULL) |
2963 | goto out_no_deleg; | |
acfdf5c3 | 2964 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2965 | if (status) |
dd239cc0 | 2966 | goto out_free; |
1da177e4 | 2967 | |
d5477a8d | 2968 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2969 | |
8c10cbdb | 2970 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2971 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2972 | out: |
2973 | open->op_delegate_type = flag; | |
d24433cd BH |
2974 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2975 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2976 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2977 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2978 | ||
4aa8913c BH |
2979 | /* 4.1 client asking for a delegation? */ |
2980 | if (open->op_deleg_want) | |
2981 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 2982 | } |
dd239cc0 BF |
2983 | return; |
2984 | out_free: | |
acfdf5c3 | 2985 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2986 | out_no_deleg: |
2987 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2988 | goto out; | |
1da177e4 LT |
2989 | } |
2990 | ||
e27f49c3 BH |
2991 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
2992 | struct nfs4_delegation *dp) | |
2993 | { | |
2994 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
2995 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2996 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2997 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
2998 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
2999 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3000 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3001 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3002 | } | |
3003 | /* Otherwise the client must be confused wanting a delegation | |
3004 | * it already has, therefore we don't return | |
3005 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3006 | */ | |
3007 | } | |
3008 | ||
1da177e4 LT |
3009 | /* |
3010 | * called with nfs4_lock_state() held. | |
3011 | */ | |
b37ad28b | 3012 | __be32 |
1da177e4 LT |
3013 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3014 | { | |
6668958f | 3015 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3016 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3017 | struct nfs4_file *fp = NULL; |
3018 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3019 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3020 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3021 | __be32 status; |
1da177e4 | 3022 | |
1da177e4 LT |
3023 | /* |
3024 | * Lookup file; if found, lookup stateid and check open request, | |
3025 | * and check for delegations in the process of being recalled. | |
3026 | * If not found, create the nfs4_file struct | |
3027 | */ | |
3028 | fp = find_file(ino); | |
3029 | if (fp) { | |
3030 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3031 | goto out; | |
38c2f4b1 | 3032 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3033 | if (status) |
3034 | goto out; | |
1da177e4 | 3035 | } else { |
c44c5eeb | 3036 | status = nfserr_bad_stateid; |
8b289b2c | 3037 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3038 | goto out; |
3e772463 | 3039 | status = nfserr_jukebox; |
32513b40 BF |
3040 | fp = open->op_file; |
3041 | open->op_file = NULL; | |
3042 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3043 | } |
3044 | ||
3045 | /* | |
3046 | * OPEN the file, or upgrade an existing OPEN. | |
3047 | * If truncate fails, the OPEN fails. | |
3048 | */ | |
3049 | if (stp) { | |
3050 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3051 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3052 | if (status) |
3053 | goto out; | |
3054 | } else { | |
4cdc951b | 3055 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 3056 | if (status) |
1da177e4 | 3057 | goto out; |
4cdc951b BF |
3058 | stp = open->op_stp; |
3059 | open->op_stp = NULL; | |
996e0938 | 3060 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
3061 | status = nfsd4_truncate(rqstp, current_fh, open); |
3062 | if (status) { | |
2283963f | 3063 | release_open_stateid(stp); |
1da177e4 LT |
3064 | goto out; |
3065 | } | |
3066 | } | |
dcef0413 BF |
3067 | update_stateid(&stp->st_stid.sc_stateid); |
3068 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3069 | |
d24433cd | 3070 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3071 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3072 | |
d24433cd BH |
3073 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3074 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3075 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3076 | goto nodeleg; | |
3077 | } | |
3078 | } | |
3079 | ||
1da177e4 LT |
3080 | /* |
3081 | * Attempt to hand out a delegation. No error return, because the | |
3082 | * OPEN succeeds even if we fail. | |
3083 | */ | |
3084 | nfs4_open_delegation(current_fh, open, stp); | |
d24433cd | 3085 | nodeleg: |
1da177e4 LT |
3086 | status = nfs_ok; |
3087 | ||
8c10cbdb | 3088 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3089 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3090 | out: |
d24433cd BH |
3091 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3092 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3093 | open->op_deleg_want) |
3094 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3095 | |
13cd2184 N |
3096 | if (fp) |
3097 | put_nfs4_file(fp); | |
37515177 | 3098 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3099 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3100 | /* |
3101 | * To finish the open response, we just need to set the rflags. | |
3102 | */ | |
3103 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3104 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3105 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3106 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3107 | ||
3108 | return status; | |
3109 | } | |
3110 | ||
d29b20cd BF |
3111 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3112 | { | |
3113 | if (open->op_openowner) { | |
3114 | struct nfs4_openowner *oo = open->op_openowner; | |
3115 | ||
3116 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3117 | list_del_init(&oo->oo_close_lru); | |
3118 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3119 | if (status) { | |
3120 | release_openowner(oo); | |
3121 | open->op_openowner = NULL; | |
3122 | } else | |
3123 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3124 | } | |
3125 | } | |
32513b40 BF |
3126 | if (open->op_file) |
3127 | nfsd4_free_file(open->op_file); | |
4cdc951b BF |
3128 | if (open->op_stp) |
3129 | nfs4_free_stateid(open->op_stp); | |
d29b20cd BF |
3130 | } |
3131 | ||
b37ad28b | 3132 | __be32 |
b591480b BF |
3133 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3134 | clientid_t *clid) | |
1da177e4 LT |
3135 | { |
3136 | struct nfs4_client *clp; | |
b37ad28b | 3137 | __be32 status; |
1da177e4 LT |
3138 | |
3139 | nfs4_lock_state(); | |
3140 | dprintk("process_renew(%08x/%08x): starting\n", | |
3141 | clid->cl_boot, clid->cl_id); | |
3142 | status = nfserr_stale_clientid; | |
3143 | if (STALE_CLIENTID(clid)) | |
3144 | goto out; | |
3145 | clp = find_confirmed_client(clid); | |
3146 | status = nfserr_expired; | |
3147 | if (clp == NULL) { | |
3148 | /* We assume the client took too long to RENEW. */ | |
3149 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3150 | goto out; | |
3151 | } | |
1da177e4 | 3152 | status = nfserr_cb_path_down; |
ea1da636 | 3153 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3154 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3155 | goto out; |
3156 | status = nfs_ok; | |
3157 | out: | |
3158 | nfs4_unlock_state(); | |
3159 | return status; | |
3160 | } | |
3161 | ||
c47d832b | 3162 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3163 | }; |
3164 | ||
33dcc481 JL |
3165 | static bool grace_ended; |
3166 | ||
a76b4319 | 3167 | static void |
af558e33 | 3168 | nfsd4_end_grace(void) |
a76b4319 | 3169 | { |
33dcc481 JL |
3170 | /* do nothing if grace period already ended */ |
3171 | if (grace_ended) | |
3172 | return; | |
3173 | ||
a76b4319 | 3174 | dprintk("NFSD: end of grace period\n"); |
33dcc481 | 3175 | grace_ended = true; |
2a4317c5 | 3176 | nfsd4_record_grace_done(&init_net, boot_time); |
af558e33 | 3177 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3178 | /* |
3179 | * Now that every NFSv4 client has had the chance to recover and | |
3180 | * to see the (possibly new, possibly shorter) lease time, we | |
3181 | * can safely set the next grace time to the current lease time: | |
3182 | */ | |
3183 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3184 | } |
3185 | ||
fd39ca9a | 3186 | static time_t |
1da177e4 LT |
3187 | nfs4_laundromat(void) |
3188 | { | |
3189 | struct nfs4_client *clp; | |
fe0750e5 | 3190 | struct nfs4_openowner *oo; |
1da177e4 LT |
3191 | struct nfs4_delegation *dp; |
3192 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3193 | time_t cutoff = get_seconds() - nfsd4_lease; |
3194 | time_t t, clientid_val = nfsd4_lease; | |
3195 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3196 | |
3197 | nfs4_lock_state(); | |
3198 | ||
3199 | dprintk("NFSD: laundromat service - starting\n"); | |
33dcc481 | 3200 | nfsd4_end_grace(); |
36acb66b BH |
3201 | INIT_LIST_HEAD(&reaplist); |
3202 | spin_lock(&client_lock); | |
1da177e4 LT |
3203 | list_for_each_safe(pos, next, &client_lru) { |
3204 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3205 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3206 | t = clp->cl_time - cutoff; | |
3207 | if (clientid_val > t) | |
3208 | clientid_val = t; | |
3209 | break; | |
3210 | } | |
d7682988 BH |
3211 | if (atomic_read(&clp->cl_refcount)) { |
3212 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3213 | clp->cl_clientid.cl_id); | |
3214 | continue; | |
3215 | } | |
3216 | unhash_client_locked(clp); | |
3217 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3218 | } |
3219 | spin_unlock(&client_lock); | |
3220 | list_for_each_safe(pos, next, &reaplist) { | |
3221 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3222 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3223 | clp->cl_clientid.cl_id); | |
2a4317c5 | 3224 | nfsd4_client_record_remove(clp); |
1da177e4 LT |
3225 | expire_client(clp); |
3226 | } | |
1da177e4 LT |
3227 | spin_lock(&recall_lock); |
3228 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3229 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3230 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3231 | u = dp->dl_time - cutoff; | |
3232 | if (test_val > u) | |
3233 | test_val = u; | |
3234 | break; | |
3235 | } | |
1da177e4 LT |
3236 | list_move(&dp->dl_recall_lru, &reaplist); |
3237 | } | |
3238 | spin_unlock(&recall_lock); | |
3239 | list_for_each_safe(pos, next, &reaplist) { | |
3240 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3241 | unhash_delegation(dp); |
3242 | } | |
cf07d2ea | 3243 | test_val = nfsd4_lease; |
1da177e4 | 3244 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3245 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3246 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3247 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3248 | if (test_val > u) |
3249 | test_val = u; | |
3250 | break; | |
3251 | } | |
fe0750e5 | 3252 | release_openowner(oo); |
1da177e4 LT |
3253 | } |
3254 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3255 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3256 | nfs4_unlock_state(); | |
3257 | return clientid_val; | |
3258 | } | |
3259 | ||
a254b246 HH |
3260 | static struct workqueue_struct *laundry_wq; |
3261 | static void laundromat_main(struct work_struct *); | |
3262 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3263 | ||
3264 | static void | |
c4028958 | 3265 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3266 | { |
3267 | time_t t; | |
3268 | ||
3269 | t = nfs4_laundromat(); | |
3270 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3271 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3272 | } |
3273 | ||
f7a4d872 | 3274 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3275 | { |
f7a4d872 BF |
3276 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3277 | return nfserr_bad_stateid; | |
3278 | return nfs_ok; | |
1da177e4 LT |
3279 | } |
3280 | ||
3281 | static int | |
3282 | STALE_STATEID(stateid_t *stateid) | |
3283 | { | |
d3b313a4 | 3284 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3285 | return 0; |
3286 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3287 | STATEID_VAL(stateid)); |
e4e83ea4 | 3288 | return 1; |
1da177e4 LT |
3289 | } |
3290 | ||
3291 | static inline int | |
82c5ff1b | 3292 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3293 | { |
82c5ff1b JL |
3294 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3295 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3296 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3297 | } |
3298 | ||
3299 | static inline int | |
82c5ff1b | 3300 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3301 | { |
82c5ff1b JL |
3302 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3303 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3304 | } |
3305 | ||
3306 | static | |
dcef0413 | 3307 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3308 | { |
b37ad28b | 3309 | __be32 status = nfserr_openmode; |
1da177e4 | 3310 | |
02921914 BF |
3311 | /* For lock stateid's, we test the parent open, not the lock: */ |
3312 | if (stp->st_openstp) | |
3313 | stp = stp->st_openstp; | |
82c5ff1b | 3314 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3315 | goto out; |
82c5ff1b | 3316 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3317 | goto out; |
3318 | status = nfs_ok; | |
3319 | out: | |
3320 | return status; | |
3321 | } | |
3322 | ||
b37ad28b | 3323 | static inline __be32 |
1da177e4 LT |
3324 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3325 | { | |
203a8c8e | 3326 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3327 | return nfs_ok; |
af558e33 | 3328 | else if (locks_in_grace()) { |
25985edc | 3329 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3330 | * conflicting state; so we must wait out the grace period. */ |
3331 | return nfserr_grace; | |
3332 | } else if (flags & WR_STATE) | |
3333 | return nfs4_share_conflict(current_fh, | |
3334 | NFS4_SHARE_DENY_WRITE); | |
3335 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3336 | return nfs4_share_conflict(current_fh, | |
3337 | NFS4_SHARE_DENY_READ); | |
3338 | } | |
3339 | ||
3340 | /* | |
3341 | * Allow READ/WRITE during grace period on recovered state only for files | |
3342 | * that are not able to provide mandatory locking. | |
3343 | */ | |
3344 | static inline int | |
18f82731 | 3345 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3346 | { |
203a8c8e | 3347 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3348 | } |
3349 | ||
81b82965 BF |
3350 | /* Returns true iff a is later than b: */ |
3351 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3352 | { | |
3353 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3354 | } | |
3355 | ||
57b7b43b | 3356 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3357 | { |
6668958f AA |
3358 | /* |
3359 | * When sessions are used the stateid generation number is ignored | |
3360 | * when it is zero. | |
3361 | */ | |
28dde241 | 3362 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3363 | return nfs_ok; |
3364 | ||
3365 | if (in->si_generation == ref->si_generation) | |
3366 | return nfs_ok; | |
6668958f | 3367 | |
0836f587 | 3368 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3369 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3370 | return nfserr_bad_stateid; |
3371 | /* | |
81b82965 BF |
3372 | * However, we could see a stateid from the past, even from a |
3373 | * non-buggy client. For example, if the client sends a lock | |
3374 | * while some IO is outstanding, the lock may bump si_generation | |
3375 | * while the IO is still in flight. The client could avoid that | |
3376 | * situation by waiting for responses on all the IO requests, | |
3377 | * but better performance may result in retrying IO that | |
3378 | * receives an old_stateid error if requests are rarely | |
3379 | * reordered in flight: | |
0836f587 | 3380 | */ |
81b82965 | 3381 | return nfserr_old_stateid; |
0836f587 BF |
3382 | } |
3383 | ||
38c2f4b1 | 3384 | __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3385 | { |
97b7e3b6 BF |
3386 | struct nfs4_stid *s; |
3387 | struct nfs4_ol_stateid *ols; | |
3388 | __be32 status; | |
17456804 BS |
3389 | |
3390 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3391 | return nfserr_stale_stateid; |
17456804 | 3392 | |
38c2f4b1 | 3393 | s = find_stateid(cl, stateid); |
97b7e3b6 BF |
3394 | if (!s) |
3395 | return nfserr_stale_stateid; | |
36279ac1 | 3396 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3397 | if (status) |
97b7e3b6 BF |
3398 | return status; |
3399 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3400 | return nfs_ok; | |
3401 | ols = openlockstateid(s); | |
3402 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3403 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3404 | return nfserr_bad_stateid; |
3405 | return nfs_ok; | |
17456804 BS |
3406 | } |
3407 | ||
38c2f4b1 BF |
3408 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) |
3409 | { | |
3410 | struct nfs4_client *cl; | |
3411 | ||
3412 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3413 | return nfserr_bad_stateid; | |
3414 | if (STALE_STATEID(stateid)) | |
3415 | return nfserr_stale_stateid; | |
3416 | cl = find_confirmed_client(&stateid->si_opaque.so_clid); | |
3417 | if (!cl) | |
3418 | return nfserr_expired; | |
3419 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3420 | if (!*s) | |
3421 | return nfserr_bad_stateid; | |
3422 | return nfs_ok; | |
3423 | ||
3424 | } | |
3425 | ||
1da177e4 LT |
3426 | /* |
3427 | * Checks for stateid operations | |
3428 | */ | |
b37ad28b | 3429 | __be32 |
dd453dfd BH |
3430 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3431 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3432 | { |
69064a27 | 3433 | struct nfs4_stid *s; |
dcef0413 | 3434 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3435 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3436 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3437 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3438 | __be32 status; |
1da177e4 | 3439 | |
1da177e4 LT |
3440 | if (filpp) |
3441 | *filpp = NULL; | |
3442 | ||
18f82731 | 3443 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3444 | return nfserr_grace; |
3445 | ||
3446 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3447 | return check_special_stateids(current_fh, stateid, flags); | |
3448 | ||
38c2f4b1 BF |
3449 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); |
3450 | if (status) | |
3451 | return status; | |
69064a27 BF |
3452 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3453 | if (status) | |
3454 | goto out; | |
f7a4d872 BF |
3455 | switch (s->sc_type) { |
3456 | case NFS4_DELEG_STID: | |
69064a27 | 3457 | dp = delegstateid(s); |
dc9bf700 BF |
3458 | status = nfs4_check_delegmode(dp, flags); |
3459 | if (status) | |
3460 | goto out; | |
43b0178e | 3461 | if (filpp) { |
acfdf5c3 | 3462 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3463 | BUG_ON(!*filpp); |
3464 | } | |
f7a4d872 BF |
3465 | break; |
3466 | case NFS4_OPEN_STID: | |
3467 | case NFS4_LOCK_STID: | |
69064a27 | 3468 | stp = openlockstateid(s); |
f7a4d872 BF |
3469 | status = nfs4_check_fh(current_fh, stp); |
3470 | if (status) | |
1da177e4 | 3471 | goto out; |
fe0750e5 | 3472 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3473 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3474 | goto out; |
a4455be0 BF |
3475 | status = nfs4_check_openmode(stp, flags); |
3476 | if (status) | |
1da177e4 | 3477 | goto out; |
f9d7562f BF |
3478 | if (filpp) { |
3479 | if (flags & RD_STATE) | |
3480 | *filpp = find_readable_file(stp->st_file); | |
3481 | else | |
3482 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3483 | } |
f7a4d872 BF |
3484 | break; |
3485 | default: | |
3486 | return nfserr_bad_stateid; | |
1da177e4 LT |
3487 | } |
3488 | status = nfs_ok; | |
3489 | out: | |
3490 | return status; | |
3491 | } | |
3492 | ||
e1ca12df | 3493 | static __be32 |
dcef0413 | 3494 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3495 | { |
fe0750e5 | 3496 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3497 | return nfserr_locks_held; |
3498 | release_lock_stateid(stp); | |
3499 | return nfs_ok; | |
3500 | } | |
3501 | ||
17456804 BS |
3502 | /* |
3503 | * Test if the stateid is valid | |
3504 | */ | |
3505 | __be32 | |
3506 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3507 | struct nfsd4_test_stateid *test_stateid) | |
3508 | { | |
03cfb420 BS |
3509 | struct nfsd4_test_stateid_id *stateid; |
3510 | struct nfs4_client *cl = cstate->session->se_client; | |
3511 | ||
3512 | nfs4_lock_state(); | |
3513 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
3514 | stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); | |
3515 | nfs4_unlock_state(); | |
3516 | ||
17456804 BS |
3517 | return nfs_ok; |
3518 | } | |
3519 | ||
e1ca12df BS |
3520 | __be32 |
3521 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3522 | struct nfsd4_free_stateid *free_stateid) | |
3523 | { | |
3524 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3525 | struct nfs4_stid *s; |
38c2f4b1 | 3526 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3527 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3528 | |
3529 | nfs4_lock_state(); | |
38c2f4b1 | 3530 | s = find_stateid(cl, stateid); |
2da1cec7 | 3531 | if (!s) |
81b82965 | 3532 | goto out; |
2da1cec7 BF |
3533 | switch (s->sc_type) { |
3534 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3535 | ret = nfserr_locks_held; |
3536 | goto out; | |
2da1cec7 BF |
3537 | case NFS4_OPEN_STID: |
3538 | case NFS4_LOCK_STID: | |
3539 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3540 | if (ret) | |
3541 | goto out; | |
3542 | if (s->sc_type == NFS4_LOCK_STID) | |
3543 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3544 | else | |
3545 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3546 | break; |
3547 | default: | |
3548 | ret = nfserr_bad_stateid; | |
e1ca12df | 3549 | } |
e1ca12df BS |
3550 | out: |
3551 | nfs4_unlock_state(); | |
3552 | return ret; | |
3553 | } | |
3554 | ||
4c4cd222 N |
3555 | static inline int |
3556 | setlkflg (int type) | |
3557 | { | |
3558 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3559 | RD_STATE : WR_STATE; | |
3560 | } | |
1da177e4 | 3561 | |
dcef0413 | 3562 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3563 | { |
3564 | struct svc_fh *current_fh = &cstate->current_fh; | |
3565 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3566 | __be32 status; | |
3567 | ||
c0a5d93e BF |
3568 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3569 | if (status) | |
3570 | return status; | |
f7a4d872 BF |
3571 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3572 | /* | |
3573 | * "Closed" stateid's exist *only* to return | |
3574 | * nfserr_replay_me from the previous step. | |
3575 | */ | |
3576 | return nfserr_bad_stateid; | |
3577 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3578 | if (status) | |
3579 | return status; | |
3580 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3581 | } |
3582 | ||
1da177e4 LT |
3583 | /* |
3584 | * Checks for sequence id mutating operations. | |
3585 | */ | |
b37ad28b | 3586 | static __be32 |
dd453dfd | 3587 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3588 | stateid_t *stateid, char typemask, |
dcef0413 | 3589 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3590 | { |
0836f587 | 3591 | __be32 status; |
38c2f4b1 | 3592 | struct nfs4_stid *s; |
1da177e4 | 3593 | |
8c10cbdb BH |
3594 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3595 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3596 | |
1da177e4 | 3597 | *stpp = NULL; |
38c2f4b1 | 3598 | status = nfsd4_lookup_stateid(stateid, typemask, &s); |
c0a5d93e BF |
3599 | if (status) |
3600 | return status; | |
38c2f4b1 | 3601 | *stpp = openlockstateid(s); |
c0a5d93e | 3602 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3603 | |
c0a5d93e BF |
3604 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3605 | } | |
39325bd0 | 3606 | |
dcef0413 | 3607 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3608 | { |
3609 | __be32 status; | |
3610 | struct nfs4_openowner *oo; | |
1da177e4 | 3611 | |
c0a5d93e | 3612 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3613 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3614 | if (status) |
3615 | return status; | |
c0a5d93e | 3616 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3617 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3618 | return nfserr_bad_stateid; |
3a4f98bb | 3619 | return nfs_ok; |
1da177e4 LT |
3620 | } |
3621 | ||
b37ad28b | 3622 | __be32 |
ca364317 | 3623 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3624 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3625 | { |
b37ad28b | 3626 | __be32 status; |
fe0750e5 | 3627 | struct nfs4_openowner *oo; |
dcef0413 | 3628 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3629 | |
3630 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3631 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3632 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3633 | |
ca364317 | 3634 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3635 | if (status) |
3636 | return status; | |
1da177e4 LT |
3637 | |
3638 | nfs4_lock_state(); | |
3639 | ||
9072d5c6 | 3640 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3641 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3642 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3643 | if (status) |
68b66e82 | 3644 | goto out; |
fe0750e5 | 3645 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3646 | status = nfserr_bad_stateid; |
dad1c067 | 3647 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3648 | goto out; |
dad1c067 | 3649 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3650 | update_stateid(&stp->st_stid.sc_stateid); |
3651 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3652 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3653 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3654 | |
2a4317c5 | 3655 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3656 | status = nfs_ok; |
1da177e4 | 3657 | out: |
5ec094c1 BF |
3658 | if (!cstate->replay_owner) |
3659 | nfs4_unlock_state(); | |
1da177e4 LT |
3660 | return status; |
3661 | } | |
3662 | ||
6409a5a6 | 3663 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3664 | { |
82c5ff1b | 3665 | if (!test_access(access, stp)) |
6409a5a6 BF |
3666 | return; |
3667 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3668 | clear_access(access, stp); |
6409a5a6 | 3669 | } |
f197c271 | 3670 | |
6409a5a6 BF |
3671 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3672 | { | |
3673 | switch (to_access) { | |
3674 | case NFS4_SHARE_ACCESS_READ: | |
3675 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3676 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3677 | break; | |
3678 | case NFS4_SHARE_ACCESS_WRITE: | |
3679 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3680 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3681 | break; | |
3682 | case NFS4_SHARE_ACCESS_BOTH: | |
3683 | break; | |
3684 | default: | |
3685 | BUG(); | |
1da177e4 LT |
3686 | } |
3687 | } | |
3688 | ||
3689 | static void | |
3690 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3691 | { | |
3692 | int i; | |
3693 | for (i = 0; i < 4; i++) { | |
3694 | if ((i & deny) != i) | |
3695 | __clear_bit(i, bmap); | |
3696 | } | |
3697 | } | |
3698 | ||
b37ad28b | 3699 | __be32 |
ca364317 BF |
3700 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3701 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3702 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3703 | { |
b37ad28b | 3704 | __be32 status; |
dcef0413 | 3705 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3706 | |
3707 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3708 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3709 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3710 | |
c30e92df | 3711 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3712 | if (od->od_deleg_want) |
3713 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3714 | od->od_deleg_want); | |
1da177e4 LT |
3715 | |
3716 | nfs4_lock_state(); | |
c0a5d93e BF |
3717 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3718 | &od->od_stateid, &stp); | |
9072d5c6 | 3719 | if (status) |
1da177e4 | 3720 | goto out; |
1da177e4 | 3721 | status = nfserr_inval; |
82c5ff1b JL |
3722 | if (!test_access(od->od_share_access, stp)) { |
3723 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3724 | stp->st_access_bmap, od->od_share_access); |
3725 | goto out; | |
3726 | } | |
3727 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3728 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3729 | stp->st_deny_bmap, od->od_share_deny); | |
3730 | goto out; | |
3731 | } | |
6409a5a6 | 3732 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3733 | |
1da177e4 LT |
3734 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3735 | ||
dcef0413 BF |
3736 | update_stateid(&stp->st_stid.sc_stateid); |
3737 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3738 | status = nfs_ok; |
3739 | out: | |
5ec094c1 BF |
3740 | if (!cstate->replay_owner) |
3741 | nfs4_unlock_state(); | |
1da177e4 LT |
3742 | return status; |
3743 | } | |
3744 | ||
38c387b5 BF |
3745 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3746 | { | |
3747 | struct nfs4_openowner *oo; | |
3748 | struct nfs4_ol_stateid *s; | |
3749 | ||
3750 | if (!so->so_is_open_owner) | |
3751 | return; | |
3752 | oo = openowner(so); | |
3753 | s = oo->oo_last_closed_stid; | |
3754 | if (!s) | |
3755 | return; | |
3756 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3757 | /* Release the last_closed_stid on the next seqid bump: */ | |
3758 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3759 | return; | |
3760 | } | |
3761 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3762 | release_last_closed_stateid(oo); |
3763 | } | |
3764 | ||
3765 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3766 | { | |
3767 | unhash_open_stateid(s); | |
3768 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3769 | } |
3770 | ||
1da177e4 LT |
3771 | /* |
3772 | * nfs4_unlock_state() called after encode | |
3773 | */ | |
b37ad28b | 3774 | __be32 |
ca364317 | 3775 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3776 | struct nfsd4_close *close) |
1da177e4 | 3777 | { |
b37ad28b | 3778 | __be32 status; |
fe0750e5 | 3779 | struct nfs4_openowner *oo; |
dcef0413 | 3780 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3781 | |
3782 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3783 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3784 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3785 | |
3786 | nfs4_lock_state(); | |
f7a4d872 BF |
3787 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3788 | &close->cl_stateid, | |
3789 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3790 | &stp); | |
9072d5c6 | 3791 | if (status) |
1da177e4 | 3792 | goto out; |
fe0750e5 | 3793 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3794 | status = nfs_ok; |
dcef0413 BF |
3795 | update_stateid(&stp->st_stid.sc_stateid); |
3796 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3797 | |
f7a4d872 | 3798 | nfsd4_close_open_stateid(stp); |
38c387b5 | 3799 | oo->oo_last_closed_stid = stp; |
04ef5954 BF |
3800 | |
3801 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3802 | * released by the laundromat service after the lease period | |
3803 | * to enable us to handle CLOSE replay | |
3804 | */ | |
fe0750e5 BF |
3805 | if (list_empty(&oo->oo_owner.so_stateids)) |
3806 | move_to_close_lru(oo); | |
1da177e4 | 3807 | out: |
5ec094c1 BF |
3808 | if (!cstate->replay_owner) |
3809 | nfs4_unlock_state(); | |
1da177e4 LT |
3810 | return status; |
3811 | } | |
3812 | ||
b37ad28b | 3813 | __be32 |
ca364317 BF |
3814 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3815 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3816 | { |
203a8c8e BF |
3817 | struct nfs4_delegation *dp; |
3818 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3819 | struct nfs4_stid *s; |
203a8c8e | 3820 | struct inode *inode; |
b37ad28b | 3821 | __be32 status; |
1da177e4 | 3822 | |
ca364317 | 3823 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3824 | return status; |
3825 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3826 | |
3827 | nfs4_lock_state(); | |
38c2f4b1 BF |
3828 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); |
3829 | if (status) | |
203a8c8e | 3830 | goto out; |
38c2f4b1 | 3831 | dp = delegstateid(s); |
d5477a8d | 3832 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3833 | if (status) |
3834 | goto out; | |
203a8c8e BF |
3835 | |
3836 | unhash_delegation(dp); | |
1da177e4 | 3837 | out: |
203a8c8e BF |
3838 | nfs4_unlock_state(); |
3839 | ||
1da177e4 LT |
3840 | return status; |
3841 | } | |
3842 | ||
3843 | ||
1da177e4 | 3844 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3845 | |
009673b4 BF |
3846 | #define LOCKOWNER_INO_HASH_BITS 8 |
3847 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3848 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3849 | |
87df4de8 BH |
3850 | static inline u64 |
3851 | end_offset(u64 start, u64 len) | |
3852 | { | |
3853 | u64 end; | |
3854 | ||
3855 | end = start + len; | |
3856 | return end >= start ? end: NFS4_MAX_UINT64; | |
3857 | } | |
3858 | ||
3859 | /* last octet in a range */ | |
3860 | static inline u64 | |
3861 | last_byte_offset(u64 start, u64 len) | |
3862 | { | |
3863 | u64 end; | |
3864 | ||
3865 | BUG_ON(!len); | |
3866 | end = start + len; | |
3867 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3868 | } | |
3869 | ||
009673b4 | 3870 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3871 | { |
3872 | return (file_hashval(inode) + cl_id | |
3873 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3874 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3875 | } |
3876 | ||
009673b4 | 3877 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3878 | |
1da177e4 LT |
3879 | /* |
3880 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3881 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3882 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3883 | * locking, this prevents us from being completely protocol-compliant. The | |
3884 | * real solution to this problem is to start using unsigned file offsets in | |
3885 | * the VFS, but this is a very deep change! | |
3886 | */ | |
3887 | static inline void | |
3888 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3889 | { | |
3890 | if (lock->fl_start < 0) | |
3891 | lock->fl_start = OFFSET_MAX; | |
3892 | if (lock->fl_end < 0) | |
3893 | lock->fl_end = OFFSET_MAX; | |
3894 | } | |
3895 | ||
d5b9026a N |
3896 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3897 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3898 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3899 | }; |
1da177e4 LT |
3900 | |
3901 | static inline void | |
3902 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3903 | { | |
fe0750e5 | 3904 | struct nfs4_lockowner *lo; |
1da177e4 | 3905 | |
d5b9026a | 3906 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3907 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3908 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3909 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3910 | if (!deny->ld_owner.data) |
3911 | /* We just don't care that much */ | |
3912 | goto nevermind; | |
fe0750e5 BF |
3913 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3914 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3915 | } else { |
7c13f344 BF |
3916 | nevermind: |
3917 | deny->ld_owner.len = 0; | |
3918 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3919 | deny->ld_clientid.cl_boot = 0; |
3920 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3921 | } |
3922 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3923 | deny->ld_length = NFS4_MAX_UINT64; |
3924 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3925 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3926 | deny->ld_type = NFS4_READ_LT; | |
3927 | if (fl->fl_type != F_RDLCK) | |
3928 | deny->ld_type = NFS4_WRITE_LT; | |
3929 | } | |
3930 | ||
b93d87c1 BF |
3931 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3932 | { | |
3933 | struct nfs4_ol_stateid *lst; | |
3934 | ||
3935 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3936 | return false; | |
3937 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3938 | struct nfs4_ol_stateid, st_perstateowner); | |
3939 | return lst->st_file->fi_inode == inode; | |
3940 | } | |
3941 | ||
fe0750e5 BF |
3942 | static struct nfs4_lockowner * |
3943 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3944 | struct xdr_netobj *owner) |
3945 | { | |
009673b4 | 3946 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3947 | struct nfs4_lockowner *lo; |
1da177e4 | 3948 | |
009673b4 | 3949 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3950 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3951 | return lo; | |
1da177e4 LT |
3952 | } |
3953 | return NULL; | |
3954 | } | |
3955 | ||
dcef0413 | 3956 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3957 | { |
009673b4 BF |
3958 | struct inode *inode = open_stp->st_file->fi_inode; |
3959 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3960 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3961 | ||
16bfdaaf | 3962 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3963 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3964 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3965 | } |
3966 | ||
1da177e4 LT |
3967 | /* |
3968 | * Alloc a lock owner structure. | |
3969 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3970 | * occurred. |
1da177e4 | 3971 | * |
16bfdaaf | 3972 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3973 | */ |
3974 | ||
fe0750e5 | 3975 | static struct nfs4_lockowner * |
dcef0413 | 3976 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3977 | struct nfs4_lockowner *lo; |
1da177e4 | 3978 | |
fe0750e5 BF |
3979 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3980 | if (!lo) | |
1da177e4 | 3981 | return NULL; |
fe0750e5 BF |
3982 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3983 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3984 | /* It is the openowner seqid that will be incremented in encode in the |
3985 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3986 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3987 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3988 | return lo; | |
1da177e4 LT |
3989 | } |
3990 | ||
dcef0413 BF |
3991 | static struct nfs4_ol_stateid * |
3992 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3993 | { |
dcef0413 | 3994 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3995 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 3996 | |
996e0938 | 3997 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 3998 | if (stp == NULL) |
6136d2b4 | 3999 | return NULL; |
996e0938 | 4000 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 4001 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4002 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4003 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4004 | get_nfs4_file(fp); |
1da177e4 | 4005 | stp->st_file = fp; |
0997b173 | 4006 | stp->st_access_bmap = 0; |
1da177e4 | 4007 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4008 | stp->st_openstp = open_stp; |
1da177e4 LT |
4009 | return stp; |
4010 | } | |
4011 | ||
fd39ca9a | 4012 | static int |
1da177e4 LT |
4013 | check_lock_length(u64 offset, u64 length) |
4014 | { | |
87df4de8 | 4015 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4016 | LOFF_OVERFLOW(offset, length))); |
4017 | } | |
4018 | ||
dcef0413 | 4019 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4020 | { |
4021 | struct nfs4_file *fp = lock_stp->st_file; | |
4022 | int oflag = nfs4_access_to_omode(access); | |
4023 | ||
82c5ff1b | 4024 | if (test_access(access, lock_stp)) |
0997b173 BF |
4025 | return; |
4026 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4027 | set_access(access, lock_stp); |
0997b173 BF |
4028 | } |
4029 | ||
2355c596 | 4030 | 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 |
4031 | { |
4032 | struct nfs4_file *fi = ost->st_file; | |
4033 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4034 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4035 | struct nfs4_lockowner *lo; | |
4036 | unsigned int strhashval; | |
4037 | ||
4038 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
4039 | if (lo) { | |
4040 | if (!cstate->minorversion) | |
4041 | return nfserr_bad_seqid; | |
4042 | /* XXX: a lockowner always has exactly one stateid: */ | |
4043 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4044 | struct nfs4_ol_stateid, st_perstateowner); | |
4045 | return nfs_ok; | |
4046 | } | |
16bfdaaf | 4047 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4048 | &lock->v.new.owner); |
4049 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4050 | if (lo == NULL) | |
4051 | return nfserr_jukebox; | |
4052 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4053 | if (*lst == NULL) { | |
4054 | release_lockowner(lo); | |
4055 | return nfserr_jukebox; | |
4056 | } | |
4057 | *new = true; | |
4058 | return nfs_ok; | |
4059 | } | |
4060 | ||
1da177e4 LT |
4061 | /* |
4062 | * LOCK operation | |
4063 | */ | |
b37ad28b | 4064 | __be32 |
ca364317 | 4065 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4066 | struct nfsd4_lock *lock) |
1da177e4 | 4067 | { |
fe0750e5 BF |
4068 | struct nfs4_openowner *open_sop = NULL; |
4069 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4070 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4071 | struct file *filp = NULL; |
1da177e4 | 4072 | struct file_lock file_lock; |
8dc7c311 | 4073 | struct file_lock conflock; |
b37ad28b | 4074 | __be32 status = 0; |
64a284d0 | 4075 | bool new_state = false; |
b34f27aa | 4076 | int lkflg; |
b8dd7b9a | 4077 | int err; |
1da177e4 LT |
4078 | |
4079 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4080 | (long long) lock->lk_offset, | |
4081 | (long long) lock->lk_length); | |
4082 | ||
1da177e4 LT |
4083 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4084 | return nfserr_inval; | |
4085 | ||
ca364317 | 4086 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4087 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4088 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4089 | return status; | |
4090 | } | |
4091 | ||
1da177e4 LT |
4092 | nfs4_lock_state(); |
4093 | ||
4094 | if (lock->lk_is_new) { | |
893f8770 N |
4095 | /* |
4096 | * Client indicates that this is a new lockowner. | |
4097 | * Use open owner and open stateid to create lock owner and | |
4098 | * lock stateid. | |
4099 | */ | |
dcef0413 | 4100 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4101 | |
4102 | if (nfsd4_has_session(cstate)) | |
4103 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4104 | memcpy(&lock->v.new.clientid, | |
4105 | &cstate->session->se_client->cl_clientid, | |
4106 | sizeof(clientid_t)); | |
4107 | ||
1da177e4 | 4108 | status = nfserr_stale_clientid; |
684e5638 | 4109 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 4110 | goto out; |
1da177e4 | 4111 | |
1da177e4 | 4112 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4113 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4114 | lock->lk_new_open_seqid, |
4115 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4116 | &open_stp); |
37515177 | 4117 | if (status) |
1da177e4 | 4118 | goto out; |
fe0750e5 | 4119 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4120 | status = nfserr_bad_stateid; |
684e5638 | 4121 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4122 | &lock->v.new.clientid)) |
4123 | goto out; | |
64a284d0 BF |
4124 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4125 | &lock_stp, &new_state); | |
4126 | if (status) | |
1da177e4 | 4127 | goto out; |
1da177e4 LT |
4128 | } else { |
4129 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 4130 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4131 | lock->lk_old_lock_seqid, |
4132 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4133 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
4134 | if (status) |
4135 | goto out; | |
4136 | } | |
64a284d0 | 4137 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4138 | |
b34f27aa BF |
4139 | lkflg = setlkflg(lock->lk_type); |
4140 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4141 | if (status) | |
4142 | goto out; | |
4143 | ||
0dd395dc | 4144 | status = nfserr_grace; |
af558e33 | 4145 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4146 | goto out; |
4147 | status = nfserr_no_grace; | |
af558e33 | 4148 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4149 | goto out; |
4150 | ||
1da177e4 LT |
4151 | locks_init_lock(&file_lock); |
4152 | switch (lock->lk_type) { | |
4153 | case NFS4_READ_LT: | |
4154 | case NFS4_READW_LT: | |
0997b173 BF |
4155 | filp = find_readable_file(lock_stp->st_file); |
4156 | if (filp) | |
4157 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4158 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4159 | break; |
1da177e4 LT |
4160 | case NFS4_WRITE_LT: |
4161 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4162 | filp = find_writeable_file(lock_stp->st_file); |
4163 | if (filp) | |
4164 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4165 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4166 | break; |
1da177e4 LT |
4167 | default: |
4168 | status = nfserr_inval; | |
4169 | goto out; | |
4170 | } | |
f9d7562f BF |
4171 | if (!filp) { |
4172 | status = nfserr_openmode; | |
4173 | goto out; | |
4174 | } | |
b59e3c0e | 4175 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4176 | file_lock.fl_pid = current->tgid; |
4177 | file_lock.fl_file = filp; | |
4178 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4179 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4180 | |
4181 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4182 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4183 | nfs4_transform_lock_offset(&file_lock); |
4184 | ||
4185 | /* | |
4186 | * Try to lock the file in the VFS. | |
4187 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4188 | */ | |
4189 | ||
529d7b2a | 4190 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4191 | switch (-err) { |
1da177e4 | 4192 | case 0: /* success! */ |
dcef0413 BF |
4193 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4194 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4195 | sizeof(stateid_t)); |
b8dd7b9a | 4196 | status = 0; |
eb76b3fd AA |
4197 | break; |
4198 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4199 | status = nfserr_denied; | |
4200 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4201 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4202 | break; | |
1da177e4 LT |
4203 | case (EDEADLK): |
4204 | status = nfserr_deadlock; | |
eb76b3fd | 4205 | break; |
3e772463 | 4206 | default: |
fd85b817 | 4207 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4208 | status = nfserrno(err); |
eb76b3fd | 4209 | break; |
1da177e4 | 4210 | } |
1da177e4 | 4211 | out: |
64a284d0 | 4212 | if (status && new_state) |
f044ff83 | 4213 | release_lockowner(lock_sop); |
5ec094c1 BF |
4214 | if (!cstate->replay_owner) |
4215 | nfs4_unlock_state(); | |
1da177e4 LT |
4216 | return status; |
4217 | } | |
4218 | ||
55ef1274 BF |
4219 | /* |
4220 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4221 | * so we do a temporary open here just to get an open file to pass to | |
4222 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4223 | * inode operation.) | |
4224 | */ | |
4225 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4226 | { | |
4227 | struct file *file; | |
4228 | int err; | |
4229 | ||
4230 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4231 | if (err) | |
4232 | return err; | |
4233 | err = vfs_test_lock(file, lock); | |
4234 | nfsd_close(file); | |
4235 | return err; | |
4236 | } | |
4237 | ||
1da177e4 LT |
4238 | /* |
4239 | * LOCKT operation | |
4240 | */ | |
b37ad28b | 4241 | __be32 |
ca364317 BF |
4242 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4243 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4244 | { |
4245 | struct inode *inode; | |
1da177e4 | 4246 | struct file_lock file_lock; |
fe0750e5 | 4247 | struct nfs4_lockowner *lo; |
fd85b817 | 4248 | int error; |
b37ad28b | 4249 | __be32 status; |
1da177e4 | 4250 | |
af558e33 | 4251 | if (locks_in_grace()) |
1da177e4 LT |
4252 | return nfserr_grace; |
4253 | ||
4254 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4255 | return nfserr_inval; | |
4256 | ||
1da177e4 LT |
4257 | nfs4_lock_state(); |
4258 | ||
4259 | status = nfserr_stale_clientid; | |
60adfc50 | 4260 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4261 | goto out; |
1da177e4 | 4262 | |
75c096f7 | 4263 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4264 | goto out; |
1da177e4 | 4265 | |
ca364317 | 4266 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4267 | locks_init_lock(&file_lock); |
4268 | switch (lockt->lt_type) { | |
4269 | case NFS4_READ_LT: | |
4270 | case NFS4_READW_LT: | |
4271 | file_lock.fl_type = F_RDLCK; | |
4272 | break; | |
4273 | case NFS4_WRITE_LT: | |
4274 | case NFS4_WRITEW_LT: | |
4275 | file_lock.fl_type = F_WRLCK; | |
4276 | break; | |
4277 | default: | |
2fdada03 | 4278 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4279 | status = nfserr_inval; |
4280 | goto out; | |
4281 | } | |
4282 | ||
fe0750e5 BF |
4283 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4284 | if (lo) | |
4285 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4286 | file_lock.fl_pid = current->tgid; |
4287 | file_lock.fl_flags = FL_POSIX; | |
4288 | ||
4289 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4290 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4291 | |
4292 | nfs4_transform_lock_offset(&file_lock); | |
4293 | ||
1da177e4 | 4294 | status = nfs_ok; |
55ef1274 | 4295 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4296 | if (error) { |
4297 | status = nfserrno(error); | |
4298 | goto out; | |
4299 | } | |
9d6a8c5c | 4300 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4301 | status = nfserr_denied; |
9d6a8c5c | 4302 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4303 | } |
4304 | out: | |
4305 | nfs4_unlock_state(); | |
4306 | return status; | |
4307 | } | |
4308 | ||
b37ad28b | 4309 | __be32 |
ca364317 | 4310 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4311 | struct nfsd4_locku *locku) |
1da177e4 | 4312 | { |
dcef0413 | 4313 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4314 | struct file *filp = NULL; |
4315 | struct file_lock file_lock; | |
b37ad28b | 4316 | __be32 status; |
b8dd7b9a | 4317 | int err; |
1da177e4 LT |
4318 | |
4319 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4320 | (long long) locku->lu_offset, | |
4321 | (long long) locku->lu_length); | |
4322 | ||
4323 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4324 | return nfserr_inval; | |
4325 | ||
4326 | nfs4_lock_state(); | |
4327 | ||
9072d5c6 | 4328 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4329 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4330 | if (status) |
1da177e4 | 4331 | goto out; |
f9d7562f BF |
4332 | filp = find_any_file(stp->st_file); |
4333 | if (!filp) { | |
4334 | status = nfserr_lock_range; | |
4335 | goto out; | |
4336 | } | |
1da177e4 LT |
4337 | BUG_ON(!filp); |
4338 | locks_init_lock(&file_lock); | |
4339 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4340 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4341 | file_lock.fl_pid = current->tgid; |
4342 | file_lock.fl_file = filp; | |
4343 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4344 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4345 | file_lock.fl_start = locku->lu_offset; |
4346 | ||
87df4de8 | 4347 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4348 | nfs4_transform_lock_offset(&file_lock); |
4349 | ||
4350 | /* | |
4351 | * Try to unlock the file in the VFS. | |
4352 | */ | |
fd85b817 | 4353 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4354 | if (err) { |
fd85b817 | 4355 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4356 | goto out_nfserr; |
4357 | } | |
4358 | /* | |
4359 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4360 | */ | |
dcef0413 BF |
4361 | update_stateid(&stp->st_stid.sc_stateid); |
4362 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4363 | |
4364 | out: | |
71c3bcd7 BF |
4365 | if (!cstate->replay_owner) |
4366 | nfs4_unlock_state(); | |
1da177e4 LT |
4367 | return status; |
4368 | ||
4369 | out_nfserr: | |
b8dd7b9a | 4370 | status = nfserrno(err); |
1da177e4 LT |
4371 | goto out; |
4372 | } | |
4373 | ||
4374 | /* | |
4375 | * returns | |
4376 | * 1: locks held by lockowner | |
4377 | * 0: no locks held by lockowner | |
4378 | */ | |
4379 | static int | |
fe0750e5 | 4380 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4381 | { |
4382 | struct file_lock **flpp; | |
f9d7562f | 4383 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4384 | int status = 0; |
4385 | ||
b89f4321 | 4386 | lock_flocks(); |
1da177e4 | 4387 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4388 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4389 | status = 1; |
4390 | goto out; | |
796dadfd | 4391 | } |
1da177e4 LT |
4392 | } |
4393 | out: | |
b89f4321 | 4394 | unlock_flocks(); |
1da177e4 LT |
4395 | return status; |
4396 | } | |
4397 | ||
b37ad28b | 4398 | __be32 |
b591480b BF |
4399 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4400 | struct nfsd4_compound_state *cstate, | |
4401 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4402 | { |
4403 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4404 | struct nfs4_stateowner *sop; |
fe0750e5 | 4405 | struct nfs4_lockowner *lo; |
dcef0413 | 4406 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4407 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4408 | struct list_head matches; |
16bfdaaf | 4409 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4410 | __be32 status; |
1da177e4 LT |
4411 | |
4412 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4413 | clid->cl_boot, clid->cl_id); | |
4414 | ||
4415 | /* XXX check for lease expiration */ | |
4416 | ||
4417 | status = nfserr_stale_clientid; | |
849823c5 | 4418 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4419 | return status; |
1da177e4 LT |
4420 | |
4421 | nfs4_lock_state(); | |
4422 | ||
3e9e3dbe | 4423 | status = nfserr_locks_held; |
3e9e3dbe | 4424 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4425 | |
16bfdaaf BF |
4426 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4427 | if (sop->so_is_open_owner) | |
4428 | continue; | |
06f1f864 BF |
4429 | if (!same_owner_str(sop, owner, clid)) |
4430 | continue; | |
4431 | list_for_each_entry(stp, &sop->so_stateids, | |
4432 | st_perstateowner) { | |
4433 | lo = lockowner(sop); | |
4434 | if (check_for_locks(stp->st_file, lo)) | |
4435 | goto out; | |
4436 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4437 | } |
3e9e3dbe N |
4438 | } |
4439 | /* Clients probably won't expect us to return with some (but not all) | |
4440 | * of the lockowner state released; so don't release any until all | |
4441 | * have been checked. */ | |
4442 | status = nfs_ok; | |
0fa822e4 | 4443 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4444 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4445 | lo_list); | |
0fa822e4 N |
4446 | /* unhash_stateowner deletes so_perclient only |
4447 | * for openowners. */ | |
fe0750e5 BF |
4448 | list_del(&lo->lo_list); |
4449 | release_lockowner(lo); | |
1da177e4 LT |
4450 | } |
4451 | out: | |
4452 | nfs4_unlock_state(); | |
4453 | return status; | |
4454 | } | |
4455 | ||
4456 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4457 | alloc_reclaim(void) |
1da177e4 | 4458 | { |
a55370a3 | 4459 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4460 | } |
4461 | ||
c7b9a459 | 4462 | int |
a1bcecd2 | 4463 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4464 | { |
4465 | unsigned int strhashval = clientstr_hashval(name); | |
4466 | struct nfs4_client *clp; | |
4467 | ||
e203d506 | 4468 | clp = find_confirmed_client_by_str(name, strhashval); |
393d8ed8 BF |
4469 | if (!clp) |
4470 | return 0; | |
a52d726b | 4471 | return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
c7b9a459 N |
4472 | } |
4473 | ||
1da177e4 LT |
4474 | /* |
4475 | * failure => all reset bets are off, nfserr_no_grace... | |
4476 | */ | |
190e4fbf N |
4477 | int |
4478 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4479 | { |
4480 | unsigned int strhashval; | |
4481 | struct nfs4_client_reclaim *crp = NULL; | |
4482 | ||
a55370a3 N |
4483 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4484 | crp = alloc_reclaim(); | |
1da177e4 LT |
4485 | if (!crp) |
4486 | return 0; | |
a55370a3 | 4487 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4488 | INIT_LIST_HEAD(&crp->cr_strhash); |
4489 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4490 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4491 | reclaim_str_hashtbl_size++; |
4492 | return 1; | |
4493 | } | |
4494 | ||
2a4317c5 | 4495 | void |
1da177e4 LT |
4496 | nfs4_release_reclaim(void) |
4497 | { | |
4498 | struct nfs4_client_reclaim *crp = NULL; | |
4499 | int i; | |
4500 | ||
1da177e4 LT |
4501 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4502 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4503 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4504 | struct nfs4_client_reclaim, cr_strhash); | |
4505 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4506 | kfree(crp); |
4507 | reclaim_str_hashtbl_size--; | |
4508 | } | |
4509 | } | |
4510 | BUG_ON(reclaim_str_hashtbl_size); | |
4511 | } | |
4512 | ||
4513 | /* | |
4514 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4515 | struct nfs4_client_reclaim * |
a52d726b | 4516 | nfsd4_find_reclaim_client(struct nfs4_client *clp) |
1da177e4 LT |
4517 | { |
4518 | unsigned int strhashval; | |
1da177e4 LT |
4519 | struct nfs4_client_reclaim *crp = NULL; |
4520 | ||
a55370a3 N |
4521 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4522 | clp->cl_name.len, clp->cl_name.data, | |
4523 | clp->cl_recdir); | |
1da177e4 LT |
4524 | |
4525 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4526 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4527 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4528 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4529 | return crp; |
4530 | } | |
4531 | } | |
4532 | return NULL; | |
4533 | } | |
4534 | ||
4535 | /* | |
4536 | * Called from OPEN. Look for clientid in reclaim list. | |
4537 | */ | |
b37ad28b | 4538 | __be32 |
1da177e4 LT |
4539 | nfs4_check_open_reclaim(clientid_t *clid) |
4540 | { | |
a52d726b JL |
4541 | struct nfs4_client *clp; |
4542 | ||
4543 | /* find clientid in conf_id_hashtbl */ | |
4544 | clp = find_confirmed_client(clid); | |
4545 | if (clp == NULL) | |
4546 | return nfserr_reclaim_bad; | |
4547 | ||
4548 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4549 | } |
4550 | ||
65178db4 BS |
4551 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4552 | ||
4553 | void nfsd_forget_clients(u64 num) | |
4554 | { | |
4555 | struct nfs4_client *clp, *next; | |
4556 | int count = 0; | |
4557 | ||
4558 | nfs4_lock_state(); | |
4559 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
2a4317c5 | 4560 | nfsd4_client_record_remove(clp); |
65178db4 BS |
4561 | expire_client(clp); |
4562 | if (++count == num) | |
4563 | break; | |
4564 | } | |
4565 | nfs4_unlock_state(); | |
4566 | ||
4567 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4568 | } | |
4569 | ||
4570 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4571 | { | |
4572 | release_lockowner(lockowner(sop)); | |
4573 | } | |
4574 | ||
4575 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4576 | { | |
4577 | release_openowner(openowner(sop)); | |
4578 | } | |
4579 | ||
353de31b | 4580 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4581 | void (*release_sop)(struct nfs4_stateowner *)) |
4582 | { | |
4583 | int i, count = 0; | |
4584 | struct nfs4_stateowner *sop, *next; | |
4585 | ||
16bfdaaf BF |
4586 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4587 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4588 | if (sop->so_is_open_owner != is_open_owner) | |
4589 | continue; | |
65178db4 BS |
4590 | release_sop(sop); |
4591 | if (++count == num) | |
4592 | return count; | |
4593 | } | |
4594 | } | |
4595 | return count; | |
4596 | } | |
4597 | ||
4598 | void nfsd_forget_locks(u64 num) | |
4599 | { | |
4600 | int count; | |
4601 | ||
4602 | nfs4_lock_state(); | |
16bfdaaf | 4603 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4604 | nfs4_unlock_state(); |
4605 | ||
4606 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4607 | } | |
4608 | ||
4609 | void nfsd_forget_openowners(u64 num) | |
4610 | { | |
4611 | int count; | |
4612 | ||
4613 | nfs4_lock_state(); | |
16bfdaaf | 4614 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4615 | nfs4_unlock_state(); |
4616 | ||
4617 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4618 | } | |
4619 | ||
4620 | int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) | |
4621 | { | |
4622 | int i, count = 0; | |
2d3475c0 BS |
4623 | struct nfs4_file *fp, *fnext; |
4624 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4625 | |
4626 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4627 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4628 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
65178db4 BS |
4629 | deleg_func(dp); |
4630 | if (++count == num) | |
4631 | return count; | |
4632 | } | |
4633 | } | |
4634 | } | |
2d3475c0 | 4635 | |
65178db4 BS |
4636 | return count; |
4637 | } | |
4638 | ||
4639 | void nfsd_forget_delegations(u64 num) | |
4640 | { | |
4641 | unsigned int count; | |
4642 | ||
4643 | nfs4_lock_state(); | |
4644 | count = nfsd_process_n_delegations(num, unhash_delegation); | |
4645 | nfs4_unlock_state(); | |
4646 | ||
4647 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4648 | } | |
4649 | ||
4650 | void nfsd_recall_delegations(u64 num) | |
4651 | { | |
4652 | unsigned int count; | |
4653 | ||
4654 | nfs4_lock_state(); | |
4655 | spin_lock(&recall_lock); | |
4656 | count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); | |
4657 | spin_unlock(&recall_lock); | |
4658 | nfs4_unlock_state(); | |
4659 | ||
4660 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4661 | } | |
4662 | ||
4663 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4664 | ||
ac4d8ff2 | 4665 | /* initialization to perform at module load time: */ |
1da177e4 | 4666 | |
72083396 | 4667 | void |
ac4d8ff2 | 4668 | nfs4_state_init(void) |
1da177e4 | 4669 | { |
72083396 | 4670 | int i; |
1da177e4 | 4671 | |
1da177e4 LT |
4672 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4673 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4674 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4675 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4676 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4677 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4678 | } |
5282fd72 ME |
4679 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4680 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4681 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4682 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4683 | } | |
16bfdaaf BF |
4684 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4685 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4686 | } |
009673b4 BF |
4687 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4688 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4689 | INIT_LIST_HEAD(&close_lru); |
4690 | INIT_LIST_HEAD(&client_lru); | |
4691 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4692 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4693 | } |
4694 | ||
c2f1a551 MS |
4695 | /* |
4696 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4697 | * client may quite reasonably hang on to a delegation as long as it has | |
4698 | * the inode cached. This becomes an obvious problem the first time a | |
4699 | * client's inode cache approaches the size of the server's total memory. | |
4700 | * | |
4701 | * For now we avoid this problem by imposing a hard limit on the number | |
4702 | * of delegations, which varies according to the server's memory size. | |
4703 | */ | |
4704 | static void | |
4705 | set_max_delegations(void) | |
4706 | { | |
4707 | /* | |
4708 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4709 | * estimates suggest that in the worst case (where every delegation | |
4710 | * is for a different inode), a delegation could take about 1.5K, | |
4711 | * giving a worst case usage of about 6% of memory. | |
4712 | */ | |
4713 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4714 | } | |
4715 | ||
ac4d8ff2 N |
4716 | /* initialization to perform when the nfsd service is started: */ |
4717 | ||
a6d6b781 JL |
4718 | int |
4719 | nfs4_state_start(void) | |
ac4d8ff2 | 4720 | { |
b5a1a81e BF |
4721 | int ret; |
4722 | ||
2a4317c5 JL |
4723 | /* |
4724 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4725 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4726 | * need to pass a net pointer into this function, take a reference | |
4727 | * to that instead and then do most of the rest of this on a per-net | |
4728 | * basis. | |
4729 | */ | |
4730 | get_net(&init_net); | |
4731 | nfsd4_client_tracking_init(&init_net); | |
1da177e4 | 4732 | boot_time = get_seconds(); |
af558e33 | 4733 | locks_start_grace(&nfsd4_manager); |
33dcc481 | 4734 | grace_ended = false; |
9a8db97e | 4735 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4736 | nfsd4_grace); |
b5a1a81e | 4737 | ret = set_callback_cred(); |
a6d6b781 JL |
4738 | if (ret) { |
4739 | ret = -ENOMEM; | |
4740 | goto out_recovery; | |
4741 | } | |
58da282b | 4742 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4743 | if (laundry_wq == NULL) { |
4744 | ret = -ENOMEM; | |
4745 | goto out_recovery; | |
4746 | } | |
b5a1a81e BF |
4747 | ret = nfsd4_create_callback_queue(); |
4748 | if (ret) | |
4749 | goto out_free_laundry; | |
e46b498c | 4750 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4751 | set_max_delegations(); |
b5a1a81e BF |
4752 | return 0; |
4753 | out_free_laundry: | |
4754 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4755 | out_recovery: |
2a4317c5 JL |
4756 | nfsd4_client_tracking_exit(&init_net); |
4757 | put_net(&init_net); | |
b5a1a81e | 4758 | return ret; |
1da177e4 LT |
4759 | } |
4760 | ||
1da177e4 LT |
4761 | static void |
4762 | __nfs4_state_shutdown(void) | |
4763 | { | |
4764 | int i; | |
4765 | struct nfs4_client *clp = NULL; | |
4766 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4767 | struct list_head *pos, *next, reaplist; |
4768 | ||
1da177e4 LT |
4769 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4770 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4771 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4772 | expire_client(clp); | |
4773 | } | |
4774 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4775 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4776 | expire_client(clp); | |
4777 | } | |
4778 | } | |
4779 | INIT_LIST_HEAD(&reaplist); | |
4780 | spin_lock(&recall_lock); | |
4781 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4782 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4783 | list_move(&dp->dl_recall_lru, &reaplist); | |
4784 | } | |
4785 | spin_unlock(&recall_lock); | |
4786 | list_for_each_safe(pos, next, &reaplist) { | |
4787 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4788 | unhash_delegation(dp); |
4789 | } | |
4790 | ||
2a4317c5 JL |
4791 | nfsd4_client_tracking_exit(&init_net); |
4792 | put_net(&init_net); | |
1da177e4 LT |
4793 | } |
4794 | ||
4795 | void | |
4796 | nfs4_state_shutdown(void) | |
4797 | { | |
afe2c511 | 4798 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4799 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4800 | locks_end_grace(&nfsd4_manager); |
1da177e4 | 4801 | nfs4_lock_state(); |
1da177e4 | 4802 | __nfs4_state_shutdown(); |
1da177e4 | 4803 | nfs4_unlock_state(); |
c3935e30 | 4804 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4805 | } |
8b70484c TM |
4806 | |
4807 | static void | |
4808 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4809 | { | |
37c593c5 TM |
4810 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4811 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4812 | } |
4813 | ||
4814 | static void | |
4815 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4816 | { | |
37c593c5 TM |
4817 | if (cstate->minorversion) { |
4818 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4819 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4820 | } | |
4821 | } | |
4822 | ||
4823 | void | |
4824 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4825 | { | |
4826 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4827 | } |
4828 | ||
62cd4a59 TM |
4829 | /* |
4830 | * functions to set current state id | |
4831 | */ | |
9428fe1a TM |
4832 | void |
4833 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4834 | { | |
4835 | put_stateid(cstate, &odp->od_stateid); | |
4836 | } | |
4837 | ||
8b70484c TM |
4838 | void |
4839 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4840 | { | |
4841 | put_stateid(cstate, &open->op_stateid); | |
4842 | } | |
4843 | ||
62cd4a59 TM |
4844 | void |
4845 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4846 | { | |
4847 | put_stateid(cstate, &close->cl_stateid); | |
4848 | } | |
4849 | ||
4850 | void | |
4851 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4852 | { | |
4853 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4854 | } | |
4855 | ||
4856 | /* | |
4857 | * functions to consume current state id | |
4858 | */ | |
1e97b519 | 4859 | |
9428fe1a TM |
4860 | void |
4861 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4862 | { | |
4863 | get_stateid(cstate, &odp->od_stateid); | |
4864 | } | |
4865 | ||
4866 | void | |
4867 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4868 | { | |
4869 | get_stateid(cstate, &drp->dr_stateid); | |
4870 | } | |
4871 | ||
1e97b519 TM |
4872 | void |
4873 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4874 | { | |
4875 | get_stateid(cstate, &fsp->fr_stateid); | |
4876 | } | |
4877 | ||
4878 | void | |
4879 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4880 | { | |
4881 | get_stateid(cstate, &setattr->sa_stateid); | |
4882 | } | |
4883 | ||
8b70484c TM |
4884 | void |
4885 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4886 | { | |
4887 | get_stateid(cstate, &close->cl_stateid); | |
4888 | } | |
4889 | ||
4890 | void | |
62cd4a59 | 4891 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4892 | { |
62cd4a59 | 4893 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4894 | } |
30813e27 TM |
4895 | |
4896 | void | |
4897 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4898 | { | |
4899 | get_stateid(cstate, &read->rd_stateid); | |
4900 | } | |
4901 | ||
4902 | void | |
4903 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
4904 | { | |
4905 | get_stateid(cstate, &write->wr_stateid); | |
4906 | } |