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> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 43 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 44 | #include "xdr4.h" |
0a3adade | 45 | #include "vfs.h" |
bfa4b365 | 46 | #include "current_stateid.h" |
99dbb8fe | 47 | #include "fault_inject.h" |
1da177e4 | 48 | |
5e1533c7 SK |
49 | #include "netns.h" |
50 | ||
1da177e4 LT |
51 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
52 | ||
53 | /* Globals */ | |
cf07d2ea | 54 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 55 | time_t nfsd4_grace = 90; |
fd39ca9a | 56 | static time_t boot_time; |
f32f3c2d BF |
57 | |
58 | #define all_ones {{~0,~0},~0} | |
59 | static const stateid_t one_stateid = { | |
60 | .si_generation = ~0, | |
61 | .si_opaque = all_ones, | |
62 | }; | |
63 | static const stateid_t zero_stateid = { | |
64 | /* all fields zero */ | |
65 | }; | |
19ff0f28 TM |
66 | static const stateid_t currentstateid = { |
67 | .si_generation = 1, | |
68 | }; | |
f32f3c2d | 69 | |
ec6b5d7b | 70 | static u64 current_sessionid = 1; |
fd39ca9a | 71 | |
f32f3c2d BF |
72 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
73 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 74 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 75 | |
1da177e4 | 76 | /* forward declarations */ |
fe0750e5 | 77 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 78 | |
8b671b80 BF |
79 | /* Locking: */ |
80 | ||
81 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 82 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 83 | |
8b671b80 BF |
84 | /* |
85 | * Currently used for the del_recall_lru and file hash table. In an | |
86 | * effort to decrease the scope of the client_mutex, this spinlock may | |
87 | * eventually cover more: | |
88 | */ | |
89 | static DEFINE_SPINLOCK(recall_lock); | |
90 | ||
fe0750e5 BF |
91 | static struct kmem_cache *openowner_slab = NULL; |
92 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
93 | static struct kmem_cache *file_slab = NULL; |
94 | static struct kmem_cache *stateid_slab = NULL; | |
95 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 96 | |
1da177e4 LT |
97 | void |
98 | nfs4_lock_state(void) | |
99 | { | |
353ab6e9 | 100 | mutex_lock(&client_mutex); |
1da177e4 LT |
101 | } |
102 | ||
508dc6e1 BH |
103 | static void free_session(struct kref *); |
104 | ||
105 | /* Must be called under the client_lock */ | |
106 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
107 | { | |
108 | kref_put(&ses->se_ref, free_session); | |
109 | } | |
110 | ||
111 | static void nfsd4_get_session(struct nfsd4_session *ses) | |
112 | { | |
113 | kref_get(&ses->se_ref); | |
114 | } | |
115 | ||
1da177e4 LT |
116 | void |
117 | nfs4_unlock_state(void) | |
118 | { | |
353ab6e9 | 119 | mutex_unlock(&client_mutex); |
1da177e4 LT |
120 | } |
121 | ||
122 | static inline u32 | |
123 | opaque_hashval(const void *ptr, int nbytes) | |
124 | { | |
125 | unsigned char *cptr = (unsigned char *) ptr; | |
126 | ||
127 | u32 x = 0; | |
128 | while (nbytes--) { | |
129 | x *= 37; | |
130 | x += *cptr++; | |
131 | } | |
132 | return x; | |
133 | } | |
134 | ||
1da177e4 LT |
135 | static struct list_head del_recall_lru; |
136 | ||
32513b40 BF |
137 | static void nfsd4_free_file(struct nfs4_file *f) |
138 | { | |
139 | kmem_cache_free(file_slab, f); | |
140 | } | |
141 | ||
13cd2184 N |
142 | static inline void |
143 | put_nfs4_file(struct nfs4_file *fi) | |
144 | { | |
8b671b80 BF |
145 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
146 | list_del(&fi->fi_hash); | |
147 | spin_unlock(&recall_lock); | |
148 | iput(fi->fi_inode); | |
32513b40 | 149 | nfsd4_free_file(fi); |
8b671b80 | 150 | } |
13cd2184 N |
151 | } |
152 | ||
153 | static inline void | |
154 | get_nfs4_file(struct nfs4_file *fi) | |
155 | { | |
8b671b80 | 156 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
157 | } |
158 | ||
ef0f3390 | 159 | static int num_delegations; |
c2f1a551 | 160 | unsigned int max_delegations; |
ef0f3390 N |
161 | |
162 | /* | |
163 | * Open owner state (share locks) | |
164 | */ | |
165 | ||
16bfdaaf BF |
166 | /* hash tables for lock and open owners */ |
167 | #define OWNER_HASH_BITS 8 | |
168 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
169 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 170 | |
16bfdaaf | 171 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
172 | { |
173 | unsigned int ret; | |
174 | ||
175 | ret = opaque_hashval(ownername->data, ownername->len); | |
176 | ret += clientid; | |
16bfdaaf | 177 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 178 | } |
ef0f3390 | 179 | |
16bfdaaf | 180 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
ef0f3390 N |
181 | |
182 | /* hash table for nfs4_file */ | |
183 | #define FILE_HASH_BITS 8 | |
184 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 185 | |
ddc04c41 BF |
186 | static unsigned int file_hashval(struct inode *ino) |
187 | { | |
188 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
189 | return hash_ptr(ino, FILE_HASH_BITS); | |
190 | } | |
191 | ||
ef0f3390 | 192 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 193 | |
998db52c | 194 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
195 | { |
196 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
197 | atomic_inc(&fp->fi_access[oflag]); | |
198 | } | |
199 | ||
998db52c BF |
200 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
201 | { | |
202 | if (oflag == O_RDWR) { | |
203 | __nfs4_file_get_access(fp, O_RDONLY); | |
204 | __nfs4_file_get_access(fp, O_WRONLY); | |
205 | } else | |
206 | __nfs4_file_get_access(fp, oflag); | |
207 | } | |
208 | ||
209 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
210 | { |
211 | if (fp->fi_fds[oflag]) { | |
212 | fput(fp->fi_fds[oflag]); | |
213 | fp->fi_fds[oflag] = NULL; | |
214 | } | |
215 | } | |
216 | ||
998db52c | 217 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
218 | { |
219 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 220 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
221 | /* |
222 | * It's also safe to get rid of the RDWR open *if* | |
223 | * we no longer have need of the other kind of access | |
224 | * or if we already have the other kind of open: | |
225 | */ | |
226 | if (fp->fi_fds[1-oflag] | |
227 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
228 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
229 | } |
230 | } | |
231 | ||
998db52c BF |
232 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
233 | { | |
234 | if (oflag == O_RDWR) { | |
235 | __nfs4_file_put_access(fp, O_RDONLY); | |
236 | __nfs4_file_put_access(fp, O_WRONLY); | |
237 | } else | |
238 | __nfs4_file_put_access(fp, oflag); | |
239 | } | |
240 | ||
6136d2b4 | 241 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 242 | { |
6136d2b4 | 243 | static int min_stateid = 0; |
38c2f4b1 | 244 | struct idr *stateids = &stid->sc_client->cl_stateids; |
6136d2b4 BF |
245 | int new_stid; |
246 | int error; | |
247 | ||
38c2f4b1 | 248 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
6136d2b4 | 249 | /* |
996e0938 BF |
250 | * Note: the necessary preallocation was done in |
251 | * nfs4_alloc_stateid(). The idr code caps the number of | |
252 | * preallocations that can exist at a time, but the state lock | |
253 | * prevents anyone from using ours before we get here: | |
6136d2b4 BF |
254 | */ |
255 | BUG_ON(error); | |
256 | /* | |
257 | * It shouldn't be a problem to reuse an opaque stateid value. | |
258 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
259 | * example, a stray write retransmission could be accepted by | |
260 | * the server when it should have been rejected. Therefore, | |
261 | * adopt a trick from the sctp code to attempt to maximize the | |
262 | * amount of time until an id is reused, by ensuring they always | |
263 | * "increase" (mod INT_MAX): | |
264 | */ | |
36d44c60 | 265 | |
6136d2b4 BF |
266 | min_stateid = new_stid+1; |
267 | if (min_stateid == INT_MAX) | |
268 | min_stateid = 0; | |
269 | return new_stid; | |
36d44c60 BF |
270 | } |
271 | ||
996e0938 | 272 | static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
2a74aba7 BF |
273 | { |
274 | stateid_t *s = &stid->sc_stateid; | |
6136d2b4 | 275 | int new_id; |
2a74aba7 BF |
276 | |
277 | stid->sc_type = type; | |
278 | stid->sc_client = cl; | |
279 | s->si_opaque.so_clid = cl->cl_clientid; | |
6136d2b4 | 280 | new_id = get_new_stid(stid); |
6136d2b4 | 281 | s->si_opaque.so_id = (u32)new_id; |
2a74aba7 BF |
282 | /* Will be incremented before return to client: */ |
283 | s->si_generation = 0; | |
996e0938 BF |
284 | } |
285 | ||
286 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) | |
287 | { | |
288 | struct idr *stateids = &cl->cl_stateids; | |
289 | ||
290 | if (!idr_pre_get(stateids, GFP_KERNEL)) | |
291 | return NULL; | |
292 | /* | |
293 | * Note: if we fail here (or any time between now and the time | |
294 | * we actually get the new idr), we won't need to undo the idr | |
295 | * preallocation, since the idr code caps the number of | |
296 | * preallocated entries. | |
297 | */ | |
298 | return kmem_cache_alloc(slab, GFP_KERNEL); | |
2a74aba7 BF |
299 | } |
300 | ||
4cdc951b BF |
301 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
302 | { | |
303 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
304 | } | |
305 | ||
1da177e4 | 306 | static struct nfs4_delegation * |
dcef0413 | 307 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
308 | { |
309 | struct nfs4_delegation *dp; | |
310 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
311 | |
312 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
313 | /* |
314 | * Major work on the lease subsystem (for example, to support | |
315 | * calbacks on stat) will be required before we can support | |
316 | * write delegations properly. | |
317 | */ | |
318 | if (type != NFS4_OPEN_DELEGATE_READ) | |
319 | return NULL; | |
47f9940c MS |
320 | if (fp->fi_had_conflict) |
321 | return NULL; | |
c2f1a551 | 322 | if (num_delegations > max_delegations) |
ef0f3390 | 323 | return NULL; |
996e0938 | 324 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 325 | if (dp == NULL) |
1da177e4 | 326 | return dp; |
996e0938 | 327 | init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
2a74aba7 BF |
328 | /* |
329 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
330 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
331 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
332 | */ |
333 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 334 | num_delegations++; |
ea1da636 N |
335 | INIT_LIST_HEAD(&dp->dl_perfile); |
336 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 337 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 338 | get_nfs4_file(fp); |
1da177e4 | 339 | dp->dl_file = fp; |
1da177e4 | 340 | dp->dl_type = type; |
6c02eaa1 | 341 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
342 | dp->dl_time = 0; |
343 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 344 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
345 | return dp; |
346 | } | |
347 | ||
348 | void | |
349 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
350 | { | |
351 | if (atomic_dec_and_test(&dp->dl_count)) { | |
352 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 353 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 354 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 355 | num_delegations--; |
1da177e4 LT |
356 | } |
357 | } | |
358 | ||
acfdf5c3 | 359 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 360 | { |
acfdf5c3 BF |
361 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
362 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
363 | fp->fi_lease = NULL; | |
4ee63624 | 364 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
365 | fp->fi_deleg_file = NULL; |
366 | } | |
1da177e4 LT |
367 | } |
368 | ||
6136d2b4 BF |
369 | static void unhash_stid(struct nfs4_stid *s) |
370 | { | |
38c2f4b1 BF |
371 | struct idr *stateids = &s->sc_client->cl_stateids; |
372 | ||
373 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
6136d2b4 BF |
374 | } |
375 | ||
1da177e4 LT |
376 | /* Called under the state lock. */ |
377 | static void | |
378 | unhash_delegation(struct nfs4_delegation *dp) | |
379 | { | |
6136d2b4 | 380 | unhash_stid(&dp->dl_stid); |
ea1da636 | 381 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 382 | spin_lock(&recall_lock); |
5d926e8c | 383 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
384 | list_del_init(&dp->dl_recall_lru); |
385 | spin_unlock(&recall_lock); | |
acfdf5c3 | 386 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
387 | nfs4_put_delegation(dp); |
388 | } | |
389 | ||
390 | /* | |
391 | * SETCLIENTID state | |
392 | */ | |
393 | ||
36acb66b | 394 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
395 | static DEFINE_SPINLOCK(client_lock); |
396 | ||
1da177e4 LT |
397 | /* Hash tables for nfs4_clientid state */ |
398 | #define CLIENT_HASH_BITS 4 | |
399 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
400 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
401 | ||
ddc04c41 BF |
402 | static unsigned int clientid_hashval(u32 id) |
403 | { | |
404 | return id & CLIENT_HASH_MASK; | |
405 | } | |
406 | ||
407 | static unsigned int clientstr_hashval(const char *name) | |
408 | { | |
409 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
410 | } | |
411 | ||
1da177e4 LT |
412 | /* |
413 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
414 | * used in reboot/reset lease grace period processing | |
415 | * | |
416 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
417 | * setclientid_confirmed info. | |
418 | * | |
419 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
420 | * setclientid info. | |
421 | * | |
422 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
423 | * for lease renewal. | |
424 | * | |
425 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
426 | * for last close replay. | |
427 | */ | |
428 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
429 | static int reclaim_str_hashtbl_size = 0; | |
430 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
431 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
432 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
433 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
434 | static struct list_head client_lru; | |
435 | static struct list_head close_lru; | |
436 | ||
f9d7562f BF |
437 | /* |
438 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
439 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
440 | * only what share bits are currently in force, but also what | |
441 | * combinations of share bits previous opens have used. This allows us | |
442 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
443 | * return an error if the client attempt to downgrade to a combination | |
444 | * of share bits not explicable by closing some of its previous opens. | |
445 | * | |
446 | * XXX: This enforcement is actually incomplete, since we don't keep | |
447 | * track of access/deny bit combinations; so, e.g., we allow: | |
448 | * | |
449 | * OPEN allow read, deny write | |
450 | * OPEN allow both, deny none | |
451 | * DOWNGRADE allow read, deny none | |
452 | * | |
453 | * which we should reject. | |
454 | */ | |
5ae037e5 JL |
455 | static unsigned int |
456 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 457 | int i; |
5ae037e5 | 458 | unsigned int access = 0; |
f9d7562f | 459 | |
f9d7562f BF |
460 | for (i = 1; i < 4; i++) { |
461 | if (test_bit(i, &bmap)) | |
5ae037e5 | 462 | access |= i; |
f9d7562f | 463 | } |
5ae037e5 | 464 | return access; |
f9d7562f BF |
465 | } |
466 | ||
3a328614 | 467 | static bool |
dcef0413 | 468 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
469 | unsigned int access, deny; |
470 | ||
5ae037e5 JL |
471 | access = bmap_to_share_mode(stp->st_access_bmap); |
472 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 473 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
474 | return false; |
475 | return true; | |
f9d7562f BF |
476 | } |
477 | ||
82c5ff1b JL |
478 | /* set share access for a given stateid */ |
479 | static inline void | |
480 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
481 | { | |
482 | __set_bit(access, &stp->st_access_bmap); | |
483 | } | |
484 | ||
485 | /* clear share access for a given stateid */ | |
486 | static inline void | |
487 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
488 | { | |
489 | __clear_bit(access, &stp->st_access_bmap); | |
490 | } | |
491 | ||
492 | /* test whether a given stateid has access */ | |
493 | static inline bool | |
494 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
495 | { | |
496 | return test_bit(access, &stp->st_access_bmap); | |
497 | } | |
498 | ||
ce0fc43c JL |
499 | /* set share deny for a given stateid */ |
500 | static inline void | |
501 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
502 | { | |
503 | __set_bit(access, &stp->st_deny_bmap); | |
504 | } | |
505 | ||
506 | /* clear share deny for a given stateid */ | |
507 | static inline void | |
508 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
509 | { | |
510 | __clear_bit(access, &stp->st_deny_bmap); | |
511 | } | |
512 | ||
513 | /* test whether a given stateid is denying specific access */ | |
514 | static inline bool | |
515 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
516 | { | |
517 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
518 | } |
519 | ||
520 | static int nfs4_access_to_omode(u32 access) | |
521 | { | |
8f34a430 | 522 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
523 | case NFS4_SHARE_ACCESS_READ: |
524 | return O_RDONLY; | |
525 | case NFS4_SHARE_ACCESS_WRITE: | |
526 | return O_WRONLY; | |
527 | case NFS4_SHARE_ACCESS_BOTH: | |
528 | return O_RDWR; | |
529 | } | |
530 | BUG(); | |
531 | } | |
532 | ||
82c5ff1b JL |
533 | /* release all access and file references for a given stateid */ |
534 | static void | |
535 | release_all_access(struct nfs4_ol_stateid *stp) | |
536 | { | |
537 | int i; | |
538 | ||
539 | for (i = 1; i < 4; i++) { | |
540 | if (test_access(i, stp)) | |
541 | nfs4_file_put_access(stp->st_file, | |
542 | nfs4_access_to_omode(i)); | |
543 | clear_access(i, stp); | |
544 | } | |
545 | } | |
546 | ||
dcef0413 | 547 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 548 | { |
529d7b2a BF |
549 | list_del(&stp->st_perfile); |
550 | list_del(&stp->st_perstateowner); | |
551 | } | |
552 | ||
dcef0413 | 553 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 554 | { |
82c5ff1b | 555 | release_all_access(stp); |
a96e5b90 | 556 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
557 | stp->st_file = NULL; |
558 | } | |
559 | ||
dcef0413 | 560 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 561 | { |
529d7b2a BF |
562 | kmem_cache_free(stateid_slab, stp); |
563 | } | |
564 | ||
dcef0413 | 565 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
566 | { |
567 | struct file *file; | |
568 | ||
569 | unhash_generic_stateid(stp); | |
6136d2b4 | 570 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
571 | file = find_any_file(stp->st_file); |
572 | if (file) | |
fe0750e5 | 573 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 574 | close_generic_stateid(stp); |
529d7b2a BF |
575 | free_generic_stateid(stp); |
576 | } | |
577 | ||
fe0750e5 | 578 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 579 | { |
dcef0413 | 580 | struct nfs4_ol_stateid *stp; |
529d7b2a | 581 | |
fe0750e5 BF |
582 | list_del(&lo->lo_owner.so_strhash); |
583 | list_del(&lo->lo_perstateid); | |
009673b4 | 584 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
585 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
586 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 587 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
588 | release_lock_stateid(stp); |
589 | } | |
590 | } | |
591 | ||
fe0750e5 | 592 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 593 | { |
fe0750e5 BF |
594 | unhash_lockowner(lo); |
595 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
596 | } |
597 | ||
598 | static void | |
dcef0413 | 599 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 600 | { |
fe0750e5 | 601 | struct nfs4_lockowner *lo; |
529d7b2a BF |
602 | |
603 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
604 | lo = list_entry(open_stp->st_lockowners.next, |
605 | struct nfs4_lockowner, lo_perstateid); | |
606 | release_lockowner(lo); | |
529d7b2a BF |
607 | } |
608 | } | |
609 | ||
38c387b5 | 610 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
611 | { |
612 | unhash_generic_stateid(stp); | |
613 | release_stateid_lockowners(stp); | |
38c387b5 BF |
614 | close_generic_stateid(stp); |
615 | } | |
616 | ||
617 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
618 | { | |
619 | unhash_open_stateid(stp); | |
6136d2b4 | 620 | unhash_stid(&stp->st_stid); |
2283963f BF |
621 | free_generic_stateid(stp); |
622 | } | |
623 | ||
fe0750e5 | 624 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 625 | { |
dcef0413 | 626 | struct nfs4_ol_stateid *stp; |
f1d110ca | 627 | |
fe0750e5 BF |
628 | list_del(&oo->oo_owner.so_strhash); |
629 | list_del(&oo->oo_perclient); | |
630 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
631 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 632 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 633 | release_open_stateid(stp); |
f1d110ca BF |
634 | } |
635 | } | |
636 | ||
f7a4d872 BF |
637 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
638 | { | |
639 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
640 | ||
641 | if (s) { | |
6136d2b4 | 642 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
643 | free_generic_stateid(s); |
644 | oo->oo_last_closed_stid = NULL; | |
645 | } | |
646 | } | |
647 | ||
fe0750e5 | 648 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 649 | { |
fe0750e5 BF |
650 | unhash_openowner(oo); |
651 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 652 | release_last_closed_stateid(oo); |
fe0750e5 | 653 | nfs4_free_openowner(oo); |
f1d110ca BF |
654 | } |
655 | ||
5282fd72 ME |
656 | #define SESSION_HASH_SIZE 512 |
657 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
658 | ||
659 | static inline int | |
660 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
661 | { | |
662 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
663 | ||
664 | return sid->sequence % SESSION_HASH_SIZE; | |
665 | } | |
666 | ||
8f199b82 | 667 | #ifdef NFSD_DEBUG |
5282fd72 ME |
668 | static inline void |
669 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
670 | { | |
671 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
672 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
673 | } | |
8f199b82 TM |
674 | #else |
675 | static inline void | |
676 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
677 | { | |
678 | } | |
679 | #endif | |
680 | ||
5282fd72 | 681 | |
ec6b5d7b AA |
682 | static void |
683 | gen_sessionid(struct nfsd4_session *ses) | |
684 | { | |
685 | struct nfs4_client *clp = ses->se_client; | |
686 | struct nfsd4_sessionid *sid; | |
687 | ||
688 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
689 | sid->clientid = clp->cl_clientid; | |
690 | sid->sequence = current_sessionid++; | |
691 | sid->reserved = 0; | |
692 | } | |
693 | ||
694 | /* | |
a649637c AA |
695 | * The protocol defines ca_maxresponssize_cached to include the size of |
696 | * the rpc header, but all we need to cache is the data starting after | |
697 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
698 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
699 | * value that is the number of bytes in our cache plus a few additional | |
700 | * bytes. In order to stay on the safe side, and not promise more than | |
701 | * we can cache, those additional bytes must be the minimum possible: 24 | |
702 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
703 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
704 | * for the SEQUENCE op response: | |
705 | */ | |
706 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
707 | ||
557ce264 AA |
708 | static void |
709 | free_session_slots(struct nfsd4_session *ses) | |
710 | { | |
711 | int i; | |
712 | ||
713 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
714 | kfree(ses->se_slots[i]); | |
715 | } | |
716 | ||
a649637c | 717 | /* |
efe0cb6d BF |
718 | * We don't actually need to cache the rpc and session headers, so we |
719 | * can allocate a little less for each slot: | |
720 | */ | |
721 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
722 | { | |
723 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
724 | } | |
725 | ||
5b6feee9 | 726 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 727 | { |
5b6feee9 BF |
728 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
729 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 730 | |
5b6feee9 BF |
731 | return size; |
732 | } | |
ec6b5d7b | 733 | |
5b6feee9 BF |
734 | /* |
735 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 736 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 737 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 738 | */ |
5b6feee9 | 739 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 740 | { |
5b6feee9 | 741 | int avail; |
ec6b5d7b | 742 | |
5b6feee9 | 743 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 744 | |
5b6feee9 BF |
745 | spin_lock(&nfsd_drc_lock); |
746 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
747 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
748 | num = min_t(int, num, avail / slotsize); | |
749 | nfsd_drc_mem_used += num * slotsize; | |
750 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 751 | |
5b6feee9 BF |
752 | return num; |
753 | } | |
ec6b5d7b | 754 | |
5b6feee9 BF |
755 | static void nfsd4_put_drc_mem(int slotsize, int num) |
756 | { | |
4bd9b0f4 | 757 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 758 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 759 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 760 | } |
ec6b5d7b | 761 | |
5b6feee9 BF |
762 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
763 | { | |
764 | struct nfsd4_session *new; | |
765 | int mem, i; | |
a649637c | 766 | |
5b6feee9 BF |
767 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
768 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
769 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 770 | |
5b6feee9 BF |
771 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
772 | if (!new) | |
773 | return NULL; | |
557ce264 | 774 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
775 | for (i = 0; i < numslots; i++) { |
776 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
777 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
778 | if (!new->se_slots[i]) | |
557ce264 | 779 | goto out_free; |
557ce264 | 780 | } |
5b6feee9 BF |
781 | return new; |
782 | out_free: | |
783 | while (i--) | |
784 | kfree(new->se_slots[i]); | |
785 | kfree(new); | |
786 | return NULL; | |
ec6b5d7b AA |
787 | } |
788 | ||
5b6feee9 | 789 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 790 | { |
5b6feee9 | 791 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 792 | |
5b6feee9 | 793 | new->maxreqs = numslots; |
d2b21743 MJ |
794 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
795 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
796 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
797 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
798 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
799 | } | |
ec6b5d7b | 800 | |
19cf5c02 BF |
801 | static void free_conn(struct nfsd4_conn *c) |
802 | { | |
803 | svc_xprt_put(c->cn_xprt); | |
804 | kfree(c); | |
805 | } | |
ec6b5d7b | 806 | |
19cf5c02 BF |
807 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
808 | { | |
809 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
810 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 811 | |
19cf5c02 BF |
812 | spin_lock(&clp->cl_lock); |
813 | if (!list_empty(&c->cn_persession)) { | |
814 | list_del(&c->cn_persession); | |
815 | free_conn(c); | |
816 | } | |
817 | spin_unlock(&clp->cl_lock); | |
eea49806 | 818 | nfsd4_probe_callback(clp); |
19cf5c02 | 819 | } |
ec6b5d7b | 820 | |
d29c374c | 821 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 822 | { |
c7662518 | 823 | struct nfsd4_conn *conn; |
ec6b5d7b | 824 | |
c7662518 BF |
825 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
826 | if (!conn) | |
db90681d | 827 | return NULL; |
c7662518 BF |
828 | svc_xprt_get(rqstp->rq_xprt); |
829 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 830 | conn->cn_flags = flags; |
db90681d BF |
831 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
832 | return conn; | |
833 | } | |
a649637c | 834 | |
328ead28 BF |
835 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
836 | { | |
837 | conn->cn_session = ses; | |
838 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
839 | } |
840 | ||
db90681d | 841 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 842 | { |
db90681d | 843 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 844 | |
c7662518 | 845 | spin_lock(&clp->cl_lock); |
328ead28 | 846 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 847 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
848 | } |
849 | ||
21b75b01 | 850 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 851 | { |
19cf5c02 | 852 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 853 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
854 | } |
855 | ||
1d1bc8f2 | 856 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 857 | { |
db90681d | 858 | struct nfsd4_conn *conn; |
21b75b01 | 859 | int ret; |
ec6b5d7b | 860 | |
1d1bc8f2 | 861 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
862 | if (!conn) |
863 | return nfserr_jukebox; | |
864 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
865 | ret = nfsd4_register_conn(conn); |
866 | if (ret) | |
867 | /* oops; xprt is already down: */ | |
868 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
24119673 WAA |
869 | if (ses->se_client->cl_cb_state == NFSD4_CB_DOWN && |
870 | dir & NFS4_CDFC4_BACK) { | |
871 | /* callback channel may be back up */ | |
872 | nfsd4_probe_callback(ses->se_client); | |
873 | } | |
c7662518 BF |
874 | return nfs_ok; |
875 | } | |
ec6b5d7b | 876 | |
1d1bc8f2 BF |
877 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
878 | { | |
879 | u32 dir = NFS4_CDFC4_FORE; | |
880 | ||
881 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
882 | dir |= NFS4_CDFC4_BACK; | |
883 | ||
884 | return nfsd4_new_conn(rqstp, ses, dir); | |
885 | } | |
886 | ||
887 | /* must be called under client_lock */ | |
19cf5c02 | 888 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 889 | { |
19cf5c02 BF |
890 | struct nfs4_client *clp = s->se_client; |
891 | struct nfsd4_conn *c; | |
ec6b5d7b | 892 | |
19cf5c02 BF |
893 | spin_lock(&clp->cl_lock); |
894 | while (!list_empty(&s->se_conns)) { | |
895 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
896 | list_del_init(&c->cn_persession); | |
897 | spin_unlock(&clp->cl_lock); | |
557ce264 | 898 | |
19cf5c02 BF |
899 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
900 | free_conn(c); | |
ec6b5d7b | 901 | |
19cf5c02 BF |
902 | spin_lock(&clp->cl_lock); |
903 | } | |
904 | spin_unlock(&clp->cl_lock); | |
c7662518 | 905 | } |
ec6b5d7b | 906 | |
508dc6e1 | 907 | static void free_session(struct kref *kref) |
c7662518 BF |
908 | { |
909 | struct nfsd4_session *ses; | |
910 | int mem; | |
911 | ||
bc2df47a | 912 | lockdep_assert_held(&client_lock); |
c7662518 | 913 | ses = container_of(kref, struct nfsd4_session, se_ref); |
19cf5c02 | 914 | nfsd4_del_conns(ses); |
c7662518 BF |
915 | spin_lock(&nfsd_drc_lock); |
916 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
917 | nfsd_drc_mem_used -= mem; | |
918 | spin_unlock(&nfsd_drc_lock); | |
919 | free_session_slots(ses); | |
920 | kfree(ses); | |
921 | } | |
922 | ||
508dc6e1 BH |
923 | void nfsd4_put_session(struct nfsd4_session *ses) |
924 | { | |
925 | spin_lock(&client_lock); | |
926 | nfsd4_put_session_locked(ses); | |
927 | spin_unlock(&client_lock); | |
928 | } | |
929 | ||
ac7c46f2 | 930 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
931 | { |
932 | struct nfsd4_session *new; | |
933 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
934 | int numslots, slotsize; | |
57b7b43b | 935 | __be32 status; |
5b6feee9 BF |
936 | int idx; |
937 | ||
938 | /* | |
939 | * Note decreasing slot size below client's request may | |
940 | * make it difficult for client to function correctly, whereas | |
941 | * decreasing the number of slots will (just?) affect | |
942 | * performance. When short on memory we therefore prefer to | |
943 | * decrease number of slots instead of their size. | |
944 | */ | |
945 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
946 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
947 | if (numslots < 1) |
948 | return NULL; | |
5b6feee9 BF |
949 | |
950 | new = alloc_session(slotsize, numslots); | |
951 | if (!new) { | |
952 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 953 | return NULL; |
557ce264 | 954 | } |
5b6feee9 | 955 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 956 | |
ec6b5d7b AA |
957 | new->se_client = clp; |
958 | gen_sessionid(new); | |
ec6b5d7b | 959 | |
c7662518 BF |
960 | INIT_LIST_HEAD(&new->se_conns); |
961 | ||
ac7c46f2 | 962 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 963 | new->se_flags = cses->flags; |
8b5ce5cd | 964 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 965 | kref_init(&new->se_ref); |
5b6feee9 | 966 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 967 | spin_lock(&client_lock); |
ec6b5d7b | 968 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 969 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 970 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 971 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 972 | spin_unlock(&client_lock); |
ec6b5d7b | 973 | |
1d1bc8f2 | 974 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 975 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 | 976 | if (status) { |
508dc6e1 | 977 | spin_lock(&client_lock); |
c7662518 | 978 | free_session(&new->se_ref); |
508dc6e1 | 979 | spin_unlock(&client_lock); |
ac7c46f2 | 980 | return NULL; |
c7662518 | 981 | } |
dcbeaa68 | 982 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 983 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
984 | /* |
985 | * This is a little silly; with sessions there's no real | |
986 | * use for the callback address. Use the peer address | |
987 | * as a reasonable default for now, but consider fixing | |
988 | * the rpc client not to require an address in the | |
989 | * future: | |
990 | */ | |
edd76786 BF |
991 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
992 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 993 | } |
dcbeaa68 | 994 | nfsd4_probe_callback(clp); |
ac7c46f2 | 995 | return new; |
ec6b5d7b AA |
996 | } |
997 | ||
9089f1b4 | 998 | /* caller must hold client_lock */ |
5282fd72 ME |
999 | static struct nfsd4_session * |
1000 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
1001 | { | |
1002 | struct nfsd4_session *elem; | |
1003 | int idx; | |
1004 | ||
1005 | dump_sessionid(__func__, sessionid); | |
1006 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
1007 | /* Search in the appropriate list */ |
1008 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
1009 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1010 | NFS4_MAX_SESSIONID_LEN)) { | |
1011 | return elem; | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | dprintk("%s: session not found\n", __func__); | |
1016 | return NULL; | |
1017 | } | |
1018 | ||
9089f1b4 | 1019 | /* caller must hold client_lock */ |
7116ed6b | 1020 | static void |
5282fd72 | 1021 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1022 | { |
1023 | list_del(&ses->se_hash); | |
4c649378 | 1024 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1025 | list_del(&ses->se_perclnt); |
4c649378 | 1026 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1027 | } |
1028 | ||
36acb66b | 1029 | /* must be called under the client_lock */ |
1da177e4 | 1030 | static inline void |
36acb66b | 1031 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 1032 | { |
07cd4909 | 1033 | if (is_client_expired(clp)) { |
7447758b BF |
1034 | WARN_ON(1); |
1035 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
07cd4909 BH |
1036 | __func__, |
1037 | clp->cl_clientid.cl_boot, | |
1038 | clp->cl_clientid.cl_id); | |
1039 | return; | |
1040 | } | |
1041 | ||
1da177e4 LT |
1042 | dprintk("renewing client (clientid %08x/%08x)\n", |
1043 | clp->cl_clientid.cl_boot, | |
1044 | clp->cl_clientid.cl_id); | |
1045 | list_move_tail(&clp->cl_lru, &client_lru); | |
1046 | clp->cl_time = get_seconds(); | |
1047 | } | |
1048 | ||
36acb66b BH |
1049 | static inline void |
1050 | renew_client(struct nfs4_client *clp) | |
1051 | { | |
1052 | spin_lock(&client_lock); | |
1053 | renew_client_locked(clp); | |
1054 | spin_unlock(&client_lock); | |
1055 | } | |
1056 | ||
1da177e4 LT |
1057 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1058 | static int | |
1059 | STALE_CLIENTID(clientid_t *clid) | |
1060 | { | |
1061 | if (clid->cl_boot == boot_time) | |
1062 | return 0; | |
60adfc50 AA |
1063 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
1064 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
1065 | return 1; |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | * XXX Should we use a slab cache ? | |
1070 | * This type of memory management is somewhat inefficient, but we use it | |
1071 | * anyway since SETCLIENTID is not a common operation. | |
1072 | */ | |
35bba9a3 | 1073 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1074 | { |
1075 | struct nfs4_client *clp; | |
1076 | ||
35bba9a3 BF |
1077 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1078 | if (clp == NULL) | |
1079 | return NULL; | |
67114fe6 | 1080 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1081 | if (clp->cl_name.data == NULL) { |
1082 | kfree(clp); | |
1083 | return NULL; | |
1da177e4 | 1084 | } |
35bba9a3 | 1085 | clp->cl_name.len = name.len; |
1da177e4 LT |
1086 | return clp; |
1087 | } | |
1088 | ||
1089 | static inline void | |
1090 | free_client(struct nfs4_client *clp) | |
1091 | { | |
bc2df47a | 1092 | lockdep_assert_held(&client_lock); |
792c95dd BF |
1093 | while (!list_empty(&clp->cl_sessions)) { |
1094 | struct nfsd4_session *ses; | |
1095 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1096 | se_perclnt); | |
1097 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1098 | nfsd4_put_session_locked(ses); |
792c95dd | 1099 | } |
03a4e1f6 | 1100 | free_svc_cred(&clp->cl_cred); |
1da177e4 LT |
1101 | kfree(clp->cl_name.data); |
1102 | kfree(clp); | |
1103 | } | |
1104 | ||
d7682988 BH |
1105 | void |
1106 | release_session_client(struct nfsd4_session *session) | |
1107 | { | |
1108 | struct nfs4_client *clp = session->se_client; | |
1109 | ||
1110 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1111 | return; | |
1112 | if (is_client_expired(clp)) { | |
1113 | free_client(clp); | |
1114 | session->se_client = NULL; | |
1115 | } else | |
1116 | renew_client_locked(clp); | |
1117 | spin_unlock(&client_lock); | |
d7682988 BH |
1118 | } |
1119 | ||
84d38ac9 BH |
1120 | /* must be called under the client_lock */ |
1121 | static inline void | |
1122 | unhash_client_locked(struct nfs4_client *clp) | |
1123 | { | |
792c95dd BF |
1124 | struct nfsd4_session *ses; |
1125 | ||
07cd4909 | 1126 | mark_client_expired(clp); |
84d38ac9 | 1127 | list_del(&clp->cl_lru); |
4c649378 | 1128 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1129 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1130 | list_del_init(&ses->se_hash); | |
4c649378 | 1131 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1132 | } |
1133 | ||
1da177e4 LT |
1134 | static void |
1135 | expire_client(struct nfs4_client *clp) | |
1136 | { | |
fe0750e5 | 1137 | struct nfs4_openowner *oo; |
1da177e4 | 1138 | struct nfs4_delegation *dp; |
1da177e4 LT |
1139 | struct list_head reaplist; |
1140 | ||
1da177e4 LT |
1141 | INIT_LIST_HEAD(&reaplist); |
1142 | spin_lock(&recall_lock); | |
ea1da636 N |
1143 | while (!list_empty(&clp->cl_delegations)) { |
1144 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1145 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1146 | list_move(&dp->dl_recall_lru, &reaplist); |
1147 | } | |
1148 | spin_unlock(&recall_lock); | |
1149 | while (!list_empty(&reaplist)) { | |
1150 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1151 | unhash_delegation(dp); |
1152 | } | |
ea1da636 | 1153 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1154 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1155 | release_openowner(oo); | |
1da177e4 | 1156 | } |
6ff8da08 | 1157 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1158 | if (clp->cl_cb_conn.cb_xprt) |
1159 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1160 | list_del(&clp->cl_idhash); |
1161 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1162 | spin_lock(&client_lock); |
84d38ac9 | 1163 | unhash_client_locked(clp); |
46583e25 BH |
1164 | if (atomic_read(&clp->cl_refcount) == 0) |
1165 | free_client(clp); | |
be1fdf6c | 1166 | spin_unlock(&client_lock); |
1da177e4 LT |
1167 | } |
1168 | ||
35bba9a3 BF |
1169 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1170 | { | |
1171 | memcpy(target->cl_verifier.data, source->data, | |
1172 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1173 | } |
1174 | ||
35bba9a3 BF |
1175 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1176 | { | |
1da177e4 LT |
1177 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1178 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1179 | } | |
1180 | ||
03a4e1f6 | 1181 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1182 | { |
03a4e1f6 BF |
1183 | if (source->cr_principal) { |
1184 | target->cr_principal = | |
1185 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1186 | if (target->cr_principal == NULL) | |
1187 | return -ENOMEM; | |
1188 | } else | |
1189 | target->cr_principal = NULL; | |
d5497fc6 | 1190 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1191 | target->cr_uid = source->cr_uid; |
1192 | target->cr_gid = source->cr_gid; | |
1193 | target->cr_group_info = source->cr_group_info; | |
1194 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1195 | return 0; |
1da177e4 LT |
1196 | } |
1197 | ||
35bba9a3 | 1198 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1199 | { |
a55370a3 | 1200 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1201 | } |
1202 | ||
1203 | static int | |
599e0a22 BF |
1204 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1205 | { | |
1206 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1207 | } |
1208 | ||
1209 | static int | |
599e0a22 BF |
1210 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1211 | { | |
1212 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1213 | } |
1214 | ||
8fbba96e BF |
1215 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1216 | { | |
1217 | int i; | |
1218 | ||
1219 | if (g1->ngroups != g2->ngroups) | |
1220 | return false; | |
1221 | for (i=0; i<g1->ngroups; i++) | |
1222 | if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) | |
1223 | return false; | |
1224 | return true; | |
1225 | } | |
1226 | ||
5559b50a | 1227 | static bool |
599e0a22 BF |
1228 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1229 | { | |
d5497fc6 BF |
1230 | if ((cr1->cr_flavor != cr2->cr_flavor) |
1231 | || (cr1->cr_uid != cr2->cr_uid) | |
8fbba96e BF |
1232 | || (cr1->cr_gid != cr2->cr_gid) |
1233 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) | |
1234 | return false; | |
1235 | if (cr1->cr_principal == cr2->cr_principal) | |
1236 | return true; | |
1237 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1238 | return false; | |
5559b50a | 1239 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1240 | } |
1241 | ||
5ec7b46c BF |
1242 | static void gen_clid(struct nfs4_client *clp) |
1243 | { | |
1244 | static u32 current_clientid = 1; | |
1245 | ||
1da177e4 LT |
1246 | clp->cl_clientid.cl_boot = boot_time; |
1247 | clp->cl_clientid.cl_id = current_clientid++; | |
1248 | } | |
1249 | ||
deda2faa BF |
1250 | static void gen_confirm(struct nfs4_client *clp) |
1251 | { | |
ab4684d1 | 1252 | __be32 verf[2]; |
deda2faa | 1253 | static u32 i; |
1da177e4 | 1254 | |
ab4684d1 CL |
1255 | verf[0] = (__be32)get_seconds(); |
1256 | verf[1] = (__be32)i++; | |
1257 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1258 | } |
1259 | ||
38c2f4b1 | 1260 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1261 | { |
38c2f4b1 | 1262 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1263 | } |
1264 | ||
38c2f4b1 | 1265 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1266 | { |
1267 | struct nfs4_stid *s; | |
4d71ab87 | 1268 | |
38c2f4b1 | 1269 | s = find_stateid(cl, t); |
4d71ab87 BF |
1270 | if (!s) |
1271 | return NULL; | |
f459e453 | 1272 | if (typemask & s->sc_type) |
4581d140 | 1273 | return s; |
4581d140 BF |
1274 | return NULL; |
1275 | } | |
1276 | ||
b09333c4 RL |
1277 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1278 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1279 | { | |
1280 | struct nfs4_client *clp; | |
1281 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1282 | int ret; |
b09333c4 RL |
1283 | |
1284 | clp = alloc_client(name); | |
1285 | if (clp == NULL) | |
1286 | return NULL; | |
1287 | ||
792c95dd | 1288 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1289 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1290 | if (ret) { | |
1291 | spin_lock(&client_lock); | |
1292 | free_client(clp); | |
1293 | spin_unlock(&client_lock); | |
1294 | return NULL; | |
b09333c4 | 1295 | } |
38c2f4b1 | 1296 | idr_init(&clp->cl_stateids); |
b09333c4 | 1297 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1298 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1299 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1300 | INIT_LIST_HEAD(&clp->cl_idhash); |
1301 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1302 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1303 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1304 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1305 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1306 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1307 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1308 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1309 | clear_bit(0, &clp->cl_cb_slot_busy); |
1310 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1311 | copy_verf(clp, verf); | |
1312 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1313 | gen_confirm(clp); |
edd76786 | 1314 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1315 | return clp; |
1316 | } | |
1317 | ||
fd39ca9a | 1318 | static void |
1da177e4 LT |
1319 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1320 | { | |
1321 | unsigned int idhashval; | |
1322 | ||
1323 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1324 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1325 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1326 | renew_client(clp); |
1da177e4 LT |
1327 | } |
1328 | ||
fd39ca9a | 1329 | static void |
1da177e4 LT |
1330 | move_to_confirmed(struct nfs4_client *clp) |
1331 | { | |
1332 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1333 | unsigned int strhashval; | |
1334 | ||
1335 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1336 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1337 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1338 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1339 | renew_client(clp); |
1340 | } | |
1341 | ||
1342 | static struct nfs4_client * | |
1343 | find_confirmed_client(clientid_t *clid) | |
1344 | { | |
1345 | struct nfs4_client *clp; | |
1346 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1347 | ||
1348 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 BF |
1349 | if (same_clid(&clp->cl_clientid, clid)) { |
1350 | renew_client(clp); | |
1da177e4 | 1351 | return clp; |
a50d2ad1 | 1352 | } |
1da177e4 LT |
1353 | } |
1354 | return NULL; | |
1355 | } | |
1356 | ||
1357 | static struct nfs4_client * | |
1358 | find_unconfirmed_client(clientid_t *clid) | |
1359 | { | |
1360 | struct nfs4_client *clp; | |
1361 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1362 | ||
1363 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1364 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1365 | return clp; |
1366 | } | |
1367 | return NULL; | |
1368 | } | |
1369 | ||
6e5f15c9 | 1370 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1371 | { |
6e5f15c9 | 1372 | return clp->cl_exchange_flags != 0; |
e203d506 | 1373 | } |
a1bcecd2 | 1374 | |
28ce6054 | 1375 | static struct nfs4_client * |
e203d506 | 1376 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1377 | { |
1378 | struct nfs4_client *clp; | |
1379 | ||
1380 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1381 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1382 | return clp; |
1383 | } | |
1384 | return NULL; | |
1385 | } | |
1386 | ||
1387 | static struct nfs4_client * | |
e203d506 | 1388 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1389 | { |
1390 | struct nfs4_client *clp; | |
1391 | ||
1392 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1393 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1394 | return clp; |
1395 | } | |
1396 | return NULL; | |
1397 | } | |
1398 | ||
fd39ca9a | 1399 | static void |
6f3d772f | 1400 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1401 | { |
07263f1e | 1402 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1403 | struct sockaddr *sa = svc_addr(rqstp); |
1404 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1405 | unsigned short expected_family; |
1406 | ||
1407 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1408 | if (se->se_callback_netid_len == 3 && | |
1409 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1410 | expected_family = AF_INET; | |
1411 | else if (se->se_callback_netid_len == 4 && | |
1412 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1413 | expected_family = AF_INET6; | |
1414 | else | |
1da177e4 LT |
1415 | goto out_err; |
1416 | ||
f2ac4dc9 | 1417 | conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, |
aa9a4ec7 | 1418 | se->se_callback_addr_len, |
07263f1e BF |
1419 | (struct sockaddr *)&conn->cb_addr, |
1420 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1421 | |
07263f1e | 1422 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1423 | goto out_err; |
aa9a4ec7 | 1424 | |
07263f1e BF |
1425 | if (conn->cb_addr.ss_family == AF_INET6) |
1426 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1427 | |
07263f1e BF |
1428 | conn->cb_prog = se->se_callback_prog; |
1429 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1430 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1431 | return; |
1432 | out_err: | |
07263f1e BF |
1433 | conn->cb_addr.ss_family = AF_UNSPEC; |
1434 | conn->cb_addrlen = 0; | |
849823c5 | 1435 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1436 | "will not receive delegations\n", |
1437 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1438 | ||
1da177e4 LT |
1439 | return; |
1440 | } | |
1441 | ||
074fe897 | 1442 | /* |
557ce264 | 1443 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1444 | */ |
074fe897 AA |
1445 | void |
1446 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1447 | { |
557ce264 AA |
1448 | struct nfsd4_slot *slot = resp->cstate.slot; |
1449 | unsigned int base; | |
074fe897 | 1450 | |
557ce264 | 1451 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1452 | |
557ce264 AA |
1453 | slot->sl_opcnt = resp->opcnt; |
1454 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1455 | |
bf5c43c8 | 1456 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1457 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1458 | slot->sl_datalen = 0; |
bf864a31 | 1459 | return; |
074fe897 | 1460 | } |
557ce264 AA |
1461 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1462 | base = (char *)resp->cstate.datap - | |
1463 | (char *)resp->xbuf->head[0].iov_base; | |
1464 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1465 | slot->sl_datalen)) | |
1466 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1467 | return; | |
074fe897 AA |
1468 | } |
1469 | ||
1470 | /* | |
abfabf8c AA |
1471 | * Encode the replay sequence operation from the slot values. |
1472 | * If cachethis is FALSE encode the uncached rep error on the next | |
1473 | * operation which sets resp->p and increments resp->opcnt for | |
1474 | * nfs4svc_encode_compoundres. | |
074fe897 | 1475 | * |
074fe897 | 1476 | */ |
abfabf8c AA |
1477 | static __be32 |
1478 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1479 | struct nfsd4_compoundres *resp) | |
074fe897 | 1480 | { |
abfabf8c AA |
1481 | struct nfsd4_op *op; |
1482 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1483 | |
abfabf8c AA |
1484 | /* Encode the replayed sequence operation */ |
1485 | op = &args->ops[resp->opcnt - 1]; | |
1486 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1487 | |
abfabf8c | 1488 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1489 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1490 | op = &args->ops[resp->opcnt++]; |
1491 | op->status = nfserr_retry_uncached_rep; | |
1492 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1493 | } |
abfabf8c | 1494 | return op->status; |
074fe897 AA |
1495 | } |
1496 | ||
1497 | /* | |
557ce264 AA |
1498 | * The sequence operation is not cached because we can use the slot and |
1499 | * session values. | |
074fe897 AA |
1500 | */ |
1501 | __be32 | |
bf864a31 AA |
1502 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1503 | struct nfsd4_sequence *seq) | |
074fe897 | 1504 | { |
557ce264 | 1505 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1506 | __be32 status; |
1507 | ||
557ce264 | 1508 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1509 | |
abfabf8c AA |
1510 | /* Either returns 0 or nfserr_retry_uncached */ |
1511 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1512 | if (status == nfserr_retry_uncached_rep) | |
1513 | return status; | |
074fe897 | 1514 | |
557ce264 AA |
1515 | /* The sequence operation has been encoded, cstate->datap set. */ |
1516 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1517 | |
557ce264 AA |
1518 | resp->opcnt = slot->sl_opcnt; |
1519 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1520 | status = slot->sl_status; | |
074fe897 AA |
1521 | |
1522 | return status; | |
1523 | } | |
1524 | ||
0733d213 AA |
1525 | /* |
1526 | * Set the exchange_id flags returned by the server. | |
1527 | */ | |
1528 | static void | |
1529 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1530 | { | |
1531 | /* pNFS is not supported */ | |
1532 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1533 | ||
1534 | /* Referrals are supported, Migration is not. */ | |
1535 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1536 | ||
1537 | /* set the wire flags to return to client. */ | |
1538 | clid->flags = new->cl_exchange_flags; | |
1539 | } | |
1540 | ||
631fc9ea BF |
1541 | static bool client_has_state(struct nfs4_client *clp) |
1542 | { | |
1543 | /* | |
1544 | * Note clp->cl_openowners check isn't quite right: there's no | |
1545 | * need to count owners without stateid's. | |
1546 | * | |
1547 | * Also note we should probably be using this in 4.0 case too. | |
1548 | */ | |
6eccece9 BF |
1549 | return !list_empty(&clp->cl_openowners) |
1550 | || !list_empty(&clp->cl_delegations) | |
1551 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1552 | } |
1553 | ||
069b6ad4 AA |
1554 | __be32 |
1555 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1556 | struct nfsd4_compound_state *cstate, | |
1557 | struct nfsd4_exchange_id *exid) | |
1558 | { | |
0733d213 | 1559 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1560 | __be32 status; |
0733d213 AA |
1561 | unsigned int strhashval; |
1562 | char dname[HEXDIR_LEN]; | |
363168b4 | 1563 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1564 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1565 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1566 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
0733d213 | 1567 | |
363168b4 | 1568 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1569 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1570 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1571 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1572 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1573 | |
a084daf5 | 1574 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1575 | return nfserr_inval; |
1576 | ||
1577 | /* Currently only support SP4_NONE */ | |
1578 | switch (exid->spa_how) { | |
1579 | case SP4_NONE: | |
1580 | break; | |
1581 | case SP4_SSV: | |
044bc1d4 | 1582 | return nfserr_serverfault; |
0733d213 AA |
1583 | default: |
1584 | BUG(); /* checked by xdr code */ | |
1585 | case SP4_MACH_CRED: | |
1586 | return nfserr_serverfault; /* no excuse :-/ */ | |
1587 | } | |
1588 | ||
1589 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1590 | ||
1591 | if (status) | |
2786cc3a | 1592 | return status; |
0733d213 AA |
1593 | |
1594 | strhashval = clientstr_hashval(dname); | |
1595 | ||
2dbb269d | 1596 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1597 | nfs4_lock_state(); |
e203d506 | 1598 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1599 | if (conf) { |
83e08fd4 BF |
1600 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1601 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1602 | ||
136e658d BF |
1603 | if (update) { |
1604 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1605 | status = nfserr_inval; |
1a308118 BF |
1606 | goto out; |
1607 | } | |
136e658d | 1608 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1609 | status = nfserr_perm; |
136e658d BF |
1610 | goto out; |
1611 | } | |
1612 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1613 | status = nfserr_not_same; |
1614 | goto out; | |
1615 | } | |
136e658d BF |
1616 | /* case 6 */ |
1617 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1618 | new = conf; | |
1619 | goto out_copy; | |
0733d213 | 1620 | } |
136e658d | 1621 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1622 | if (client_has_state(conf)) { |
1623 | status = nfserr_clid_inuse; | |
0733d213 AA |
1624 | goto out; |
1625 | } | |
1626 | expire_client(conf); | |
1627 | goto out_new; | |
1628 | } | |
136e658d | 1629 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1630 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1631 | new = conf; |
1632 | goto out_copy; | |
1633 | } | |
1634 | /* case 5, client reboot */ | |
136e658d | 1635 | goto out_new; |
6ddbbbfe MS |
1636 | } |
1637 | ||
2dbb269d | 1638 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1639 | status = nfserr_noent; |
1640 | goto out; | |
0733d213 AA |
1641 | } |
1642 | ||
e203d506 | 1643 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
2dbb269d | 1644 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1645 | expire_client(unconf); |
0733d213 | 1646 | |
2dbb269d | 1647 | /* case 1 (normal case) */ |
0733d213 | 1648 | out_new: |
b09333c4 | 1649 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1650 | if (new == NULL) { |
4731030d | 1651 | status = nfserr_jukebox; |
0733d213 AA |
1652 | goto out; |
1653 | } | |
1654 | ||
0733d213 | 1655 | gen_clid(new); |
0733d213 AA |
1656 | add_to_unconfirmed(new, strhashval); |
1657 | out_copy: | |
1658 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1659 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1660 | ||
778df3f0 | 1661 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1662 | nfsd4_set_ex_flags(new, exid); |
1663 | ||
1664 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1665 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1666 | status = nfs_ok; |
1667 | ||
1668 | out: | |
1669 | nfs4_unlock_state(); | |
0733d213 | 1670 | return status; |
069b6ad4 AA |
1671 | } |
1672 | ||
57b7b43b | 1673 | static __be32 |
88e588d5 | 1674 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1675 | { |
88e588d5 AA |
1676 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1677 | slot_seqid); | |
b85d4c01 BH |
1678 | |
1679 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1680 | if (slot_inuse) { |
1681 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1682 | return nfserr_jukebox; |
1683 | else | |
1684 | return nfserr_seq_misordered; | |
1685 | } | |
f6d82485 | 1686 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1687 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1688 | return nfs_ok; |
88e588d5 | 1689 | if (seqid == slot_seqid) |
b85d4c01 | 1690 | return nfserr_replay_cache; |
b85d4c01 BH |
1691 | return nfserr_seq_misordered; |
1692 | } | |
1693 | ||
49557cc7 AA |
1694 | /* |
1695 | * Cache the create session result into the create session single DRC | |
1696 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1697 | * Do this for solo or embedded create session operations. | |
1698 | */ | |
1699 | static void | |
1700 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1701 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1702 | { |
1703 | slot->sl_status = nfserr; | |
1704 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1705 | } | |
1706 | ||
1707 | static __be32 | |
1708 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1709 | struct nfsd4_clid_slot *slot) | |
1710 | { | |
1711 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1712 | return slot->sl_status; | |
1713 | } | |
1714 | ||
1b74c25b MJ |
1715 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1716 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1717 | 1 + /* MIN tag is length with zero, only length */ \ | |
1718 | 3 + /* version, opcount, opcode */ \ | |
1719 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1720 | /* seqid, slotID, slotID, cache */ \ | |
1721 | 4 ) * sizeof(__be32)) | |
1722 | ||
1723 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1724 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1725 | 1 + /* status */ \ | |
1726 | 1 + /* MIN tag is length with zero, only length */ \ | |
1727 | 3 + /* opcount, opcode, opstatus*/ \ | |
1728 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1729 | /* seqid, slotID, slotID, slotID, status */ \ | |
1730 | 5 ) * sizeof(__be32)) | |
1731 | ||
57b7b43b | 1732 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1733 | { |
1734 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1735 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1736 | } | |
1737 | ||
069b6ad4 AA |
1738 | __be32 |
1739 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1740 | struct nfsd4_compound_state *cstate, | |
1741 | struct nfsd4_create_session *cr_ses) | |
1742 | { | |
363168b4 | 1743 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1744 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1745 | struct nfsd4_session *new; |
49557cc7 | 1746 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1747 | bool confirm_me = false; |
57b7b43b | 1748 | __be32 status = 0; |
ec6b5d7b | 1749 | |
a62573dc MJ |
1750 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1751 | return nfserr_inval; | |
1752 | ||
ec6b5d7b AA |
1753 | nfs4_lock_state(); |
1754 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1755 | conf = find_confirmed_client(&cr_ses->clientid); | |
1756 | ||
1757 | if (conf) { | |
49557cc7 AA |
1758 | cs_slot = &conf->cl_cs_slot; |
1759 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1760 | if (status == nfserr_replay_cache) { |
49557cc7 | 1761 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1762 | goto out; |
49557cc7 | 1763 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1764 | status = nfserr_seq_misordered; |
ec6b5d7b AA |
1765 | goto out; |
1766 | } | |
ec6b5d7b AA |
1767 | } else if (unconf) { |
1768 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1769 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1770 | status = nfserr_clid_inuse; |
1771 | goto out; | |
1772 | } | |
49557cc7 AA |
1773 | cs_slot = &unconf->cl_cs_slot; |
1774 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1775 | if (status) { |
1776 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1777 | status = nfserr_seq_misordered; |
cd5b8144 | 1778 | goto out; |
ec6b5d7b | 1779 | } |
86c3e16c | 1780 | confirm_me = true; |
ec6b5d7b AA |
1781 | conf = unconf; |
1782 | } else { | |
1783 | status = nfserr_stale_clientid; | |
1784 | goto out; | |
1785 | } | |
1786 | ||
8323c3b2 BF |
1787 | /* |
1788 | * XXX: we should probably set this at creation time, and check | |
1789 | * for consistent minorversion use throughout: | |
1790 | */ | |
1791 | conf->cl_minorversion = 1; | |
408b79bc BF |
1792 | /* |
1793 | * We do not support RDMA or persistent sessions | |
1794 | */ | |
1795 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1796 | cr_ses->flags &= ~SESSION4_RDMA; | |
1797 | ||
1b74c25b MJ |
1798 | status = nfserr_toosmall; |
1799 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1800 | goto out; | |
1801 | ||
ac7c46f2 BF |
1802 | status = nfserr_jukebox; |
1803 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1804 | if (!new) | |
ec6b5d7b | 1805 | goto out; |
ac7c46f2 BF |
1806 | status = nfs_ok; |
1807 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1808 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1809 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1810 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1811 | cs_slot->sl_seqid++; |
49557cc7 | 1812 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1813 | |
49557cc7 AA |
1814 | /* cache solo and embedded create sessions under the state lock */ |
1815 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
b9831b59 BF |
1816 | if (confirm_me) { |
1817 | unsigned int hash = clientstr_hashval(unconf->cl_recdir); | |
1818 | struct nfs4_client *old = | |
1819 | find_confirmed_client_by_str(conf->cl_recdir, hash); | |
1820 | if (old) | |
1821 | expire_client(old); | |
86c3e16c | 1822 | move_to_confirmed(conf); |
b9831b59 | 1823 | } |
ec6b5d7b AA |
1824 | out: |
1825 | nfs4_unlock_state(); | |
1826 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1827 | return status; | |
069b6ad4 AA |
1828 | } |
1829 | ||
57716355 BF |
1830 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1831 | { | |
1832 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1833 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1834 | ||
1835 | return argp->opcnt == resp->opcnt; | |
1836 | } | |
1837 | ||
1d1bc8f2 BF |
1838 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1839 | { | |
1840 | switch (*dir) { | |
1841 | case NFS4_CDFC4_FORE: | |
1842 | case NFS4_CDFC4_BACK: | |
1843 | return nfs_ok; | |
1844 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1845 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1846 | *dir = NFS4_CDFC4_BOTH; | |
1847 | return nfs_ok; | |
1848 | }; | |
1849 | return nfserr_inval; | |
1850 | } | |
1851 | ||
1852 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1853 | struct nfsd4_compound_state *cstate, | |
1854 | struct nfsd4_bind_conn_to_session *bcts) | |
1855 | { | |
1856 | __be32 status; | |
1857 | ||
1858 | if (!nfsd4_last_compound_op(rqstp)) | |
1859 | return nfserr_not_only_op; | |
1860 | spin_lock(&client_lock); | |
1861 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1862 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1863 | * client_lock iself: */ | |
1864 | if (cstate->session) { | |
1865 | nfsd4_get_session(cstate->session); | |
1866 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1867 | } | |
1868 | spin_unlock(&client_lock); | |
1869 | if (!cstate->session) | |
1870 | return nfserr_badsession; | |
1871 | ||
1872 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1873 | if (!status) |
1874 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1875 | return status; | |
1d1bc8f2 BF |
1876 | } |
1877 | ||
5d4cec2f BF |
1878 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1879 | { | |
1880 | if (!session) | |
1881 | return 0; | |
1882 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1883 | } | |
1884 | ||
069b6ad4 AA |
1885 | __be32 |
1886 | nfsd4_destroy_session(struct svc_rqst *r, | |
1887 | struct nfsd4_compound_state *cstate, | |
1888 | struct nfsd4_destroy_session *sessionid) | |
1889 | { | |
e10e0cfc | 1890 | struct nfsd4_session *ses; |
57b7b43b | 1891 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1892 | |
1893 | /* Notes: | |
1894 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1895 | * - Should we return nfserr_back_chan_busy if waiting for | |
1896 | * callbacks on to-be-destroyed session? | |
1897 | * - Do we need to clear any callback info from previous session? | |
1898 | */ | |
1899 | ||
5d4cec2f | 1900 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1901 | if (!nfsd4_last_compound_op(r)) |
1902 | return nfserr_not_only_op; | |
1903 | } | |
e10e0cfc | 1904 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1905 | spin_lock(&client_lock); |
e10e0cfc BH |
1906 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1907 | if (!ses) { | |
9089f1b4 | 1908 | spin_unlock(&client_lock); |
e10e0cfc BH |
1909 | goto out; |
1910 | } | |
1911 | ||
1912 | unhash_session(ses); | |
9089f1b4 | 1913 | spin_unlock(&client_lock); |
e10e0cfc | 1914 | |
ab707e15 | 1915 | nfs4_lock_state(); |
84f5f7cc | 1916 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1917 | nfs4_unlock_state(); |
19cf5c02 | 1918 | |
508dc6e1 | 1919 | spin_lock(&client_lock); |
19cf5c02 | 1920 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1921 | nfsd4_put_session_locked(ses); |
1922 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1923 | status = nfs_ok; |
1924 | out: | |
1925 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1926 | return status; | |
069b6ad4 AA |
1927 | } |
1928 | ||
a663bdd8 | 1929 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1930 | { |
1931 | struct nfsd4_conn *c; | |
1932 | ||
1933 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1934 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1935 | return c; |
1936 | } | |
1937 | } | |
1938 | return NULL; | |
1939 | } | |
1940 | ||
a663bdd8 | 1941 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1942 | { |
1943 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1944 | struct nfsd4_conn *c; |
21b75b01 | 1945 | int ret; |
328ead28 BF |
1946 | |
1947 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1948 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1949 | if (c) { |
1950 | spin_unlock(&clp->cl_lock); | |
1951 | free_conn(new); | |
1952 | return; | |
1953 | } | |
1954 | __nfsd4_hash_conn(new, ses); | |
1955 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1956 | ret = nfsd4_register_conn(new); |
1957 | if (ret) | |
1958 | /* oops; xprt is already down: */ | |
1959 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1960 | return; |
1961 | } | |
1962 | ||
868b89c3 MJ |
1963 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1964 | { | |
1965 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1966 | ||
1967 | return args->opcnt > session->se_fchannel.maxops; | |
1968 | } | |
1969 | ||
ae82a8d0 MJ |
1970 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1971 | struct nfsd4_session *session) | |
1972 | { | |
1973 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1974 | ||
1975 | return xb->len > session->se_fchannel.maxreq_sz; | |
1976 | } | |
1977 | ||
069b6ad4 | 1978 | __be32 |
b85d4c01 | 1979 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1980 | struct nfsd4_compound_state *cstate, |
1981 | struct nfsd4_sequence *seq) | |
1982 | { | |
f9bb94c4 | 1983 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1984 | struct nfsd4_session *session; |
1985 | struct nfsd4_slot *slot; | |
a663bdd8 | 1986 | struct nfsd4_conn *conn; |
57b7b43b | 1987 | __be32 status; |
b85d4c01 | 1988 | |
f9bb94c4 AA |
1989 | if (resp->opcnt != 1) |
1990 | return nfserr_sequence_pos; | |
1991 | ||
a663bdd8 BF |
1992 | /* |
1993 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1994 | * below. | |
1995 | */ | |
1996 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1997 | if (!conn) | |
1998 | return nfserr_jukebox; | |
1999 | ||
9089f1b4 | 2000 | spin_lock(&client_lock); |
b85d4c01 BH |
2001 | status = nfserr_badsession; |
2002 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
2003 | if (!session) | |
2004 | goto out; | |
2005 | ||
868b89c3 MJ |
2006 | status = nfserr_too_many_ops; |
2007 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
2008 | goto out; | |
2009 | ||
ae82a8d0 MJ |
2010 | status = nfserr_req_too_big; |
2011 | if (nfsd4_request_too_big(rqstp, session)) | |
2012 | goto out; | |
2013 | ||
b85d4c01 | 2014 | status = nfserr_badslot; |
6c18ba9f | 2015 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
2016 | goto out; |
2017 | ||
557ce264 | 2018 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2019 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2020 | ||
a8dfdaeb AA |
2021 | /* We do not negotiate the number of slots yet, so set the |
2022 | * maxslots to the session maxreqs which is used to encode | |
2023 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2024 | seq->maxslots = session->se_fchannel.maxreqs; | |
2025 | ||
73e79482 BF |
2026 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2027 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2028 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2029 | status = nfserr_seq_misordered; |
2030 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
2031 | goto out; | |
b85d4c01 BH |
2032 | cstate->slot = slot; |
2033 | cstate->session = session; | |
da3846a2 | 2034 | /* Return the cached reply status and set cstate->status |
557ce264 | 2035 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2036 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2037 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2038 | goto out; |
b85d4c01 BH |
2039 | } |
2040 | if (status) | |
2041 | goto out; | |
2042 | ||
a663bdd8 BF |
2043 | nfsd4_sequence_check_conn(conn, session); |
2044 | conn = NULL; | |
328ead28 | 2045 | |
b85d4c01 | 2046 | /* Success! bump slot seqid */ |
b85d4c01 | 2047 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2048 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2049 | if (seq->cachethis) |
2050 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2051 | else |
2052 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2053 | |
2054 | cstate->slot = slot; | |
2055 | cstate->session = session; | |
2056 | ||
b85d4c01 | 2057 | out: |
26c0c75e | 2058 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2059 | if (cstate->session) { |
0d7bb719 BF |
2060 | struct nfs4_client *clp = session->se_client; |
2061 | ||
36acb66b | 2062 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2063 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2064 | switch (clp->cl_cb_state) { |
2065 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2066 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2067 | break; |
2068 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2069 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2070 | break; |
fc0c3dd1 BH |
2071 | default: |
2072 | seq->status_flags = 0; | |
5423732a | 2073 | } |
aaf84eb9 | 2074 | } |
a663bdd8 | 2075 | kfree(conn); |
36acb66b | 2076 | spin_unlock(&client_lock); |
b85d4c01 BH |
2077 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2078 | return status; | |
069b6ad4 AA |
2079 | } |
2080 | ||
345c2842 MJ |
2081 | __be32 |
2082 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2083 | { | |
2084 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2085 | __be32 status = 0; |
345c2842 MJ |
2086 | |
2087 | nfs4_lock_state(); | |
2088 | unconf = find_unconfirmed_client(&dc->clientid); | |
2089 | conf = find_confirmed_client(&dc->clientid); | |
2090 | ||
2091 | if (conf) { | |
2092 | clp = conf; | |
2093 | ||
6eccece9 | 2094 | if (!is_client_expired(conf) && client_has_state(conf)) { |
345c2842 MJ |
2095 | status = nfserr_clientid_busy; |
2096 | goto out; | |
2097 | } | |
2098 | ||
2099 | /* rfc5661 18.50.3 */ | |
2100 | if (cstate->session && conf == cstate->session->se_client) { | |
2101 | status = nfserr_clientid_busy; | |
2102 | goto out; | |
2103 | } | |
2104 | } else if (unconf) | |
2105 | clp = unconf; | |
2106 | else { | |
2107 | status = nfserr_stale_clientid; | |
2108 | goto out; | |
2109 | } | |
2110 | ||
2111 | expire_client(clp); | |
2112 | out: | |
2113 | nfs4_unlock_state(); | |
2114 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2115 | return status; | |
2116 | } | |
2117 | ||
4dc6ec00 BF |
2118 | __be32 |
2119 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2120 | { | |
57b7b43b | 2121 | __be32 status = 0; |
bcecf1cc | 2122 | |
4dc6ec00 BF |
2123 | if (rc->rca_one_fs) { |
2124 | if (!cstate->current_fh.fh_dentry) | |
2125 | return nfserr_nofilehandle; | |
2126 | /* | |
2127 | * We don't take advantage of the rca_one_fs case. | |
2128 | * That's OK, it's optional, we can safely ignore it. | |
2129 | */ | |
2130 | return nfs_ok; | |
2131 | } | |
bcecf1cc | 2132 | |
4dc6ec00 | 2133 | nfs4_lock_state(); |
bcecf1cc | 2134 | status = nfserr_complete_already; |
a52d726b JL |
2135 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2136 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2137 | goto out; |
2138 | ||
2139 | status = nfserr_stale_clientid; | |
2140 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2141 | /* |
2142 | * The following error isn't really legal. | |
2143 | * But we only get here if the client just explicitly | |
2144 | * destroyed the client. Surely it no longer cares what | |
2145 | * error it gets back on an operation for the dead | |
2146 | * client. | |
2147 | */ | |
bcecf1cc MJ |
2148 | goto out; |
2149 | ||
2150 | status = nfs_ok; | |
2a4317c5 | 2151 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2152 | out: |
4dc6ec00 | 2153 | nfs4_unlock_state(); |
bcecf1cc | 2154 | return status; |
4dc6ec00 BF |
2155 | } |
2156 | ||
b37ad28b | 2157 | __be32 |
b591480b BF |
2158 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2159 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2160 | { |
a084daf5 | 2161 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
2162 | nfs4_verifier clverifier = setclid->se_verf; |
2163 | unsigned int strhashval; | |
28ce6054 | 2164 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2165 | __be32 status; |
a55370a3 | 2166 | char dname[HEXDIR_LEN]; |
1da177e4 | 2167 | |
a55370a3 N |
2168 | status = nfs4_make_rec_clidname(dname, &clname); |
2169 | if (status) | |
73aea4ec | 2170 | return status; |
a55370a3 | 2171 | |
a55370a3 | 2172 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2173 | |
63db4632 | 2174 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2175 | nfs4_lock_state(); |
e203d506 | 2176 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2177 | if (conf) { |
63db4632 | 2178 | /* case 0: */ |
1da177e4 | 2179 | status = nfserr_clid_inuse; |
e203d506 BF |
2180 | if (clp_used_exchangeid(conf)) |
2181 | goto out; | |
026722c2 | 2182 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2183 | char addr_str[INET6_ADDRSTRLEN]; |
2184 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2185 | sizeof(addr_str)); | |
2186 | dprintk("NFSD: setclientid: string in use by client " | |
2187 | "at %s\n", addr_str); | |
1da177e4 LT |
2188 | goto out; |
2189 | } | |
1da177e4 | 2190 | } |
e203d506 | 2191 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
8f930711 BF |
2192 | if (unconf) |
2193 | expire_client(unconf); | |
3e772463 | 2194 | status = nfserr_jukebox; |
8f930711 BF |
2195 | new = create_client(clname, dname, rqstp, &clverifier); |
2196 | if (new == NULL) | |
2197 | goto out; | |
34b232bb | 2198 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2199 | /* case 1: probable callback update */ |
1da177e4 | 2200 | copy_clid(new, conf); |
34b232bb | 2201 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
1da177e4 | 2202 | gen_clid(new); |
8323c3b2 BF |
2203 | /* |
2204 | * XXX: we should probably set this at creation time, and check | |
2205 | * for consistent minorversion use throughout: | |
2206 | */ | |
2207 | new->cl_minorversion = 0; | |
6f3d772f | 2208 | gen_callback(new, setclid, rqstp); |
c175b83c | 2209 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2210 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2211 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2212 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2213 | status = nfs_ok; | |
2214 | out: | |
2215 | nfs4_unlock_state(); | |
2216 | return status; | |
2217 | } | |
2218 | ||
2219 | ||
b37ad28b | 2220 | __be32 |
b591480b BF |
2221 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2222 | struct nfsd4_compound_state *cstate, | |
2223 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2224 | { |
21ab45a4 | 2225 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2226 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2227 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2228 | __be32 status; |
1da177e4 LT |
2229 | |
2230 | if (STALE_CLIENTID(clid)) | |
2231 | return nfserr_stale_clientid; | |
1da177e4 | 2232 | nfs4_lock_state(); |
21ab45a4 N |
2233 | |
2234 | conf = find_confirmed_client(clid); | |
2235 | unconf = find_unconfirmed_client(clid); | |
a186e767 | 2236 | /* |
8695b90a BF |
2237 | * We try hard to give out unique clientid's, so if we get an |
2238 | * attempt to confirm the same clientid with a different cred, | |
2239 | * there's a bug somewhere. Let's charitably assume it's our | |
2240 | * bug. | |
a186e767 | 2241 | */ |
8695b90a BF |
2242 | status = nfserr_serverfault; |
2243 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2244 | goto out; | |
2245 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2246 | goto out; | |
63db4632 | 2247 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2248 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2249 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2250 | status = nfs_ok; |
90d700b7 BF |
2251 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2252 | status = nfserr_stale_clientid; | |
2253 | goto out; | |
2254 | } | |
2255 | status = nfs_ok; | |
2256 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2257 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2258 | nfsd4_probe_callback(conf); | |
2259 | expire_client(unconf); | |
90d700b7 | 2260 | } else { /* case 3: normal case; new or rebooted client */ |
8695b90a | 2261 | unsigned int hash = clientstr_hashval(unconf->cl_recdir); |
1a69c179 | 2262 | |
8695b90a BF |
2263 | conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); |
2264 | if (conf) { | |
2265 | nfsd4_client_record_remove(conf); | |
2266 | expire_client(conf); | |
1da177e4 | 2267 | } |
8695b90a | 2268 | move_to_confirmed(unconf); |
f3d03b92 | 2269 | nfsd4_probe_callback(unconf); |
08e8987c | 2270 | } |
1da177e4 | 2271 | out: |
1da177e4 LT |
2272 | nfs4_unlock_state(); |
2273 | return status; | |
2274 | } | |
2275 | ||
32513b40 BF |
2276 | static struct nfs4_file *nfsd4_alloc_file(void) |
2277 | { | |
2278 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2279 | } | |
2280 | ||
1da177e4 | 2281 | /* OPEN Share state helper functions */ |
32513b40 | 2282 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2283 | { |
1da177e4 LT |
2284 | unsigned int hashval = file_hashval(ino); |
2285 | ||
32513b40 BF |
2286 | atomic_set(&fp->fi_ref, 1); |
2287 | INIT_LIST_HEAD(&fp->fi_hash); | |
2288 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2289 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2290 | fp->fi_inode = igrab(ino); | |
2291 | fp->fi_had_conflict = false; | |
2292 | fp->fi_lease = NULL; | |
2293 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2294 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2295 | spin_lock(&recall_lock); | |
2296 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2297 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2298 | } |
2299 | ||
e60d4398 | 2300 | static void |
e18b890b | 2301 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2302 | { |
e60d4398 N |
2303 | if (*slab == NULL) |
2304 | return; | |
1a1d92c1 | 2305 | kmem_cache_destroy(*slab); |
e60d4398 | 2306 | *slab = NULL; |
1da177e4 LT |
2307 | } |
2308 | ||
e8ff2a84 | 2309 | void |
1da177e4 LT |
2310 | nfsd4_free_slabs(void) |
2311 | { | |
fe0750e5 BF |
2312 | nfsd4_free_slab(&openowner_slab); |
2313 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2314 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2315 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2316 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2317 | } |
1da177e4 | 2318 | |
72083396 | 2319 | int |
e60d4398 N |
2320 | nfsd4_init_slabs(void) |
2321 | { | |
fe0750e5 BF |
2322 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2323 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2324 | if (openowner_slab == NULL) | |
2325 | goto out_nomem; | |
2326 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2327 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2328 | if (lockowner_slab == NULL) | |
e60d4398 N |
2329 | goto out_nomem; |
2330 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2331 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2332 | if (file_slab == NULL) |
2333 | goto out_nomem; | |
5ac049ac | 2334 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2335 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2336 | if (stateid_slab == NULL) |
2337 | goto out_nomem; | |
5b2d21c1 | 2338 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2339 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2340 | if (deleg_slab == NULL) |
2341 | goto out_nomem; | |
e60d4398 N |
2342 | return 0; |
2343 | out_nomem: | |
2344 | nfsd4_free_slabs(); | |
2345 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2346 | return -ENOMEM; | |
1da177e4 LT |
2347 | } |
2348 | ||
fe0750e5 BF |
2349 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2350 | { | |
2351 | kfree(oo->oo_owner.so_owner.data); | |
2352 | kmem_cache_free(openowner_slab, oo); | |
2353 | } | |
2354 | ||
2355 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2356 | { |
fe0750e5 BF |
2357 | kfree(lo->lo_owner.so_owner.data); |
2358 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2359 | } |
2360 | ||
ff194bd9 | 2361 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2362 | { |
ff194bd9 BF |
2363 | rp->rp_status = nfserr_serverfault; |
2364 | rp->rp_buflen = 0; | |
2365 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2366 | } |
2367 | ||
fe0750e5 | 2368 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2369 | { |
1da177e4 | 2370 | struct nfs4_stateowner *sop; |
1da177e4 | 2371 | |
fe0750e5 | 2372 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2373 | if (!sop) |
2374 | return NULL; | |
2375 | ||
2376 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2377 | if (!sop->so_owner.data) { | |
fe0750e5 | 2378 | kmem_cache_free(slab, sop); |
1da177e4 | 2379 | return NULL; |
ff194bd9 BF |
2380 | } |
2381 | sop->so_owner.len = owner->len; | |
2382 | ||
ea1da636 | 2383 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2384 | sop->so_client = clp; |
2385 | init_nfs4_replay(&sop->so_replay); | |
2386 | return sop; | |
2387 | } | |
2388 | ||
fe0750e5 | 2389 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2390 | { |
16bfdaaf | 2391 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2392 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2393 | } |
2394 | ||
fe0750e5 | 2395 | static struct nfs4_openowner * |
ff194bd9 | 2396 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2397 | struct nfs4_openowner *oo; |
ff194bd9 | 2398 | |
fe0750e5 BF |
2399 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2400 | if (!oo) | |
ff194bd9 | 2401 | return NULL; |
fe0750e5 BF |
2402 | oo->oo_owner.so_is_open_owner = 1; |
2403 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2404 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2405 | oo->oo_time = 0; |
38c387b5 | 2406 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2407 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2408 | hash_openowner(oo, clp, strhashval); | |
2409 | return oo; | |
1da177e4 LT |
2410 | } |
2411 | ||
996e0938 | 2412 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2413 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2414 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2415 | |
996e0938 | 2416 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2417 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2418 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2419 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2420 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2421 | get_nfs4_file(fp); |
1da177e4 | 2422 | stp->st_file = fp; |
1da177e4 LT |
2423 | stp->st_access_bmap = 0; |
2424 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2425 | set_access(open->op_share_access, stp); |
ce0fc43c | 2426 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2427 | stp->st_openstp = NULL; |
1da177e4 LT |
2428 | } |
2429 | ||
fd39ca9a | 2430 | static void |
fe0750e5 | 2431 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2432 | { |
fe0750e5 | 2433 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2434 | |
fe0750e5 BF |
2435 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2436 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2437 | } |
2438 | ||
1da177e4 | 2439 | static int |
599e0a22 BF |
2440 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2441 | clientid_t *clid) | |
2442 | { | |
2443 | return (sop->so_owner.len == owner->len) && | |
2444 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2445 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2446 | } |
2447 | ||
fe0750e5 | 2448 | static struct nfs4_openowner * |
1da177e4 LT |
2449 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2450 | { | |
a50d2ad1 BF |
2451 | struct nfs4_stateowner *so; |
2452 | struct nfs4_openowner *oo; | |
1da177e4 | 2453 | |
16bfdaaf BF |
2454 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2455 | if (!so->so_is_open_owner) | |
2456 | continue; | |
a50d2ad1 BF |
2457 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2458 | oo = openowner(so); | |
2459 | renew_client(oo->oo_owner.so_client); | |
2460 | return oo; | |
2461 | } | |
1da177e4 LT |
2462 | } |
2463 | return NULL; | |
2464 | } | |
2465 | ||
2466 | /* search file_hashtbl[] for file */ | |
2467 | static struct nfs4_file * | |
2468 | find_file(struct inode *ino) | |
2469 | { | |
2470 | unsigned int hashval = file_hashval(ino); | |
2471 | struct nfs4_file *fp; | |
2472 | ||
8b671b80 | 2473 | spin_lock(&recall_lock); |
1da177e4 | 2474 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2475 | if (fp->fi_inode == ino) { |
2476 | get_nfs4_file(fp); | |
8b671b80 | 2477 | spin_unlock(&recall_lock); |
1da177e4 | 2478 | return fp; |
13cd2184 | 2479 | } |
1da177e4 | 2480 | } |
8b671b80 | 2481 | spin_unlock(&recall_lock); |
1da177e4 LT |
2482 | return NULL; |
2483 | } | |
2484 | ||
1da177e4 LT |
2485 | /* |
2486 | * Called to check deny when READ with all zero stateid or | |
2487 | * WRITE with all zero or all one stateid | |
2488 | */ | |
b37ad28b | 2489 | static __be32 |
1da177e4 LT |
2490 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2491 | { | |
2492 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2493 | struct nfs4_file *fp; | |
dcef0413 | 2494 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2495 | __be32 ret; |
1da177e4 LT |
2496 | |
2497 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2498 | ||
2499 | fp = find_file(ino); | |
13cd2184 N |
2500 | if (!fp) |
2501 | return nfs_ok; | |
b700949b | 2502 | ret = nfserr_locked; |
1da177e4 | 2503 | /* Search for conflicting share reservations */ |
13cd2184 | 2504 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2505 | if (test_deny(deny_type, stp) || |
2506 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2507 | goto out; |
1da177e4 | 2508 | } |
13cd2184 N |
2509 | ret = nfs_ok; |
2510 | out: | |
2511 | put_nfs4_file(fp); | |
2512 | return ret; | |
1da177e4 LT |
2513 | } |
2514 | ||
6b57d9c8 | 2515 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2516 | { |
1da177e4 LT |
2517 | /* We're assuming the state code never drops its reference |
2518 | * without first removing the lease. Since we're in this lease | |
2519 | * callback (and since the lease code is serialized by the kernel | |
2520 | * lock) we know the server hasn't removed the lease yet, we know | |
2521 | * it's safe to take a reference: */ | |
2522 | atomic_inc(&dp->dl_count); | |
2523 | ||
1da177e4 | 2524 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2525 | |
460781b5 | 2526 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2527 | dp->dl_time = get_seconds(); |
2528 | ||
6b57d9c8 BF |
2529 | nfsd4_cb_recall(dp); |
2530 | } | |
2531 | ||
acfdf5c3 | 2532 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2533 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2534 | { | |
acfdf5c3 BF |
2535 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2536 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2537 | |
acfdf5c3 BF |
2538 | BUG_ON(!fp); |
2539 | /* We assume break_lease is only called once per lease: */ | |
2540 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2541 | /* |
2542 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2543 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2544 | * in time: |
0272e1fd BF |
2545 | */ |
2546 | fl->fl_break_time = 0; | |
1da177e4 | 2547 | |
5d926e8c | 2548 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2549 | fp->fi_had_conflict = true; |
2550 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2551 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2552 | spin_unlock(&recall_lock); |
1da177e4 LT |
2553 | } |
2554 | ||
1da177e4 LT |
2555 | static |
2556 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2557 | { | |
2558 | if (arg & F_UNLCK) | |
2559 | return lease_modify(onlist, arg); | |
2560 | else | |
2561 | return -EAGAIN; | |
2562 | } | |
2563 | ||
7b021967 | 2564 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2565 | .lm_break = nfsd_break_deleg_cb, |
2566 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2567 | }; |
2568 | ||
7a8711c9 BF |
2569 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2570 | { | |
2571 | if (nfsd4_has_session(cstate)) | |
2572 | return nfs_ok; | |
2573 | if (seqid == so->so_seqid - 1) | |
2574 | return nfserr_replay_me; | |
2575 | if (seqid == so->so_seqid) | |
2576 | return nfs_ok; | |
2577 | return nfserr_bad_seqid; | |
2578 | } | |
1da177e4 | 2579 | |
b37ad28b | 2580 | __be32 |
6668958f AA |
2581 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2582 | struct nfsd4_open *open) | |
1da177e4 | 2583 | { |
1da177e4 LT |
2584 | clientid_t *clientid = &open->op_clientid; |
2585 | struct nfs4_client *clp = NULL; | |
2586 | unsigned int strhashval; | |
fe0750e5 | 2587 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2588 | __be32 status; |
1da177e4 | 2589 | |
1da177e4 LT |
2590 | if (STALE_CLIENTID(&open->op_clientid)) |
2591 | return nfserr_stale_clientid; | |
32513b40 BF |
2592 | /* |
2593 | * In case we need it later, after we've already created the | |
2594 | * file and don't want to risk a further failure: | |
2595 | */ | |
2596 | open->op_file = nfsd4_alloc_file(); | |
2597 | if (open->op_file == NULL) | |
2598 | return nfserr_jukebox; | |
1da177e4 | 2599 | |
16bfdaaf | 2600 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2601 | oo = find_openstateowner_str(strhashval, open); |
2602 | open->op_openowner = oo; | |
2603 | if (!oo) { | |
1da177e4 LT |
2604 | clp = find_confirmed_client(clientid); |
2605 | if (clp == NULL) | |
0f442aa2 | 2606 | return nfserr_expired; |
bcf130f9 | 2607 | goto new_owner; |
1da177e4 | 2608 | } |
dad1c067 | 2609 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2610 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2611 | clp = oo->oo_owner.so_client; |
2612 | release_openowner(oo); | |
2613 | open->op_openowner = NULL; | |
bcf130f9 | 2614 | goto new_owner; |
0f442aa2 | 2615 | } |
4cdc951b BF |
2616 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2617 | if (status) | |
2618 | return status; | |
2619 | clp = oo->oo_owner.so_client; | |
2620 | goto alloc_stateid; | |
bcf130f9 BF |
2621 | new_owner: |
2622 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2623 | if (oo == NULL) | |
2624 | return nfserr_jukebox; | |
2625 | open->op_openowner = oo; | |
4cdc951b BF |
2626 | alloc_stateid: |
2627 | open->op_stp = nfs4_alloc_stateid(clp); | |
2628 | if (!open->op_stp) | |
2629 | return nfserr_jukebox; | |
0f442aa2 | 2630 | return nfs_ok; |
1da177e4 LT |
2631 | } |
2632 | ||
b37ad28b | 2633 | static inline __be32 |
4a6e43e6 N |
2634 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2635 | { | |
2636 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2637 | return nfserr_openmode; | |
2638 | else | |
2639 | return nfs_ok; | |
2640 | } | |
2641 | ||
f459e453 | 2642 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2643 | { |
f459e453 | 2644 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2645 | } |
2646 | ||
38c2f4b1 | 2647 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2648 | { |
f459e453 | 2649 | struct nfs4_stid *ret; |
24a0111e | 2650 | |
38c2f4b1 | 2651 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2652 | if (!ret) |
2653 | return NULL; | |
2654 | return delegstateid(ret); | |
24a0111e BF |
2655 | } |
2656 | ||
8b289b2c BF |
2657 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2658 | { | |
2659 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2660 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2661 | } | |
2662 | ||
b37ad28b | 2663 | static __be32 |
38c2f4b1 | 2664 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2665 | struct nfs4_delegation **dp) |
2666 | { | |
2667 | int flags; | |
b37ad28b | 2668 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2669 | |
38c2f4b1 | 2670 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2671 | if (*dp == NULL) |
c44c5eeb | 2672 | goto out; |
24a0111e | 2673 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2674 | status = nfs4_check_delegmode(*dp, flags); |
2675 | if (status) | |
2676 | *dp = NULL; | |
c44c5eeb | 2677 | out: |
8b289b2c | 2678 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2679 | return nfs_ok; |
2680 | if (status) | |
2681 | return status; | |
dad1c067 | 2682 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2683 | return nfs_ok; |
567d9829 N |
2684 | } |
2685 | ||
b37ad28b | 2686 | static __be32 |
dcef0413 | 2687 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2688 | { |
dcef0413 | 2689 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2690 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2691 | |
8beefa24 | 2692 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2693 | /* ignore lock owners */ |
2694 | if (local->st_stateowner->so_is_open_owner == 0) | |
2695 | continue; | |
2696 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2697 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2698 | *stpp = local; |
2699 | /* check for conflicting share reservations */ | |
2700 | if (!test_share(local, open)) | |
77eaae8d | 2701 | return nfserr_share_denied; |
1da177e4 | 2702 | } |
77eaae8d | 2703 | return nfs_ok; |
1da177e4 LT |
2704 | } |
2705 | ||
996e0938 BF |
2706 | static void nfs4_free_stateid(struct nfs4_ol_stateid *s) |
2707 | { | |
2708 | kmem_cache_free(stateid_slab, s); | |
5ac049ac N |
2709 | } |
2710 | ||
21fb4016 BF |
2711 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2712 | { | |
2713 | int flags = 0; | |
2714 | ||
2715 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2716 | flags |= NFSD_MAY_READ; | |
2717 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2718 | flags |= NFSD_MAY_WRITE; | |
2719 | return flags; | |
2720 | } | |
2721 | ||
0c12eaff CB |
2722 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2723 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2724 | { |
2725 | __be32 status; | |
0c12eaff CB |
2726 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2727 | int access = nfs4_access_to_access(open->op_share_access); | |
2728 | ||
f9d7562f BF |
2729 | if (!fp->fi_fds[oflag]) { |
2730 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2731 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2732 | if (status) |
2733 | return status; | |
2734 | } | |
2735 | nfs4_file_get_access(fp, oflag); | |
2736 | ||
2737 | return nfs_ok; | |
2738 | } | |
2739 | ||
b37ad28b | 2740 | static inline __be32 |
1da177e4 LT |
2741 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2742 | struct nfsd4_open *open) | |
2743 | { | |
2744 | struct iattr iattr = { | |
2745 | .ia_valid = ATTR_SIZE, | |
2746 | .ia_size = 0, | |
2747 | }; | |
2748 | if (!open->op_truncate) | |
2749 | return 0; | |
2750 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2751 | return nfserr_inval; |
1da177e4 LT |
2752 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2753 | } | |
2754 | ||
b37ad28b | 2755 | static __be32 |
dcef0413 | 2756 | 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 | 2757 | { |
b6d2f1ca | 2758 | u32 op_share_access = open->op_share_access; |
7d947842 | 2759 | bool new_access; |
b37ad28b | 2760 | __be32 status; |
1da177e4 | 2761 | |
82c5ff1b | 2762 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2763 | if (new_access) { |
0c12eaff | 2764 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2765 | if (status) |
2766 | return status; | |
6c26d08f | 2767 | } |
1da177e4 LT |
2768 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2769 | if (status) { | |
f9d7562f | 2770 | if (new_access) { |
f197c271 | 2771 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2772 | nfs4_file_put_access(fp, oflag); |
2773 | } | |
1da177e4 LT |
2774 | return status; |
2775 | } | |
2776 | /* remember the open */ | |
82c5ff1b | 2777 | set_access(op_share_access, stp); |
ce0fc43c | 2778 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2779 | |
2780 | return nfs_ok; | |
2781 | } | |
2782 | ||
2783 | ||
1da177e4 | 2784 | static void |
1255a8f3 | 2785 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2786 | { |
dad1c067 | 2787 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2788 | } |
2789 | ||
14a24e99 BF |
2790 | /* Should we give out recallable state?: */ |
2791 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2792 | { | |
2793 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2794 | return true; | |
2795 | /* | |
2796 | * In the sessions case, since we don't have to establish a | |
2797 | * separate connection for callbacks, we assume it's OK | |
2798 | * until we hear otherwise: | |
2799 | */ | |
2800 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2801 | } | |
2802 | ||
22d38c4c BF |
2803 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2804 | { | |
2805 | struct file_lock *fl; | |
2806 | ||
2807 | fl = locks_alloc_lock(); | |
2808 | if (!fl) | |
2809 | return NULL; | |
2810 | locks_init_lock(fl); | |
2811 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2812 | fl->fl_flags = FL_LEASE; | |
2813 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2814 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2815 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2816 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2817 | return fl; |
2818 | } | |
2819 | ||
edab9782 BF |
2820 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2821 | { | |
acfdf5c3 | 2822 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2823 | struct file_lock *fl; |
2824 | int status; | |
2825 | ||
2826 | fl = nfs4_alloc_init_lease(dp, flag); | |
2827 | if (!fl) | |
2828 | return -ENOMEM; | |
acfdf5c3 | 2829 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2830 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2831 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2832 | if (status) { |
acfdf5c3 | 2833 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2834 | locks_free_lock(fl); |
2835 | return -ENOMEM; | |
2836 | } | |
acfdf5c3 BF |
2837 | fp->fi_lease = fl; |
2838 | fp->fi_deleg_file = fl->fl_file; | |
2839 | get_file(fp->fi_deleg_file); | |
2840 | atomic_set(&fp->fi_delegees, 1); | |
2841 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2842 | return 0; | |
2843 | } | |
2844 | ||
2845 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2846 | { | |
2847 | struct nfs4_file *fp = dp->dl_file; | |
2848 | ||
2849 | if (!fp->fi_lease) | |
2850 | return nfs4_setlease(dp, flag); | |
2851 | spin_lock(&recall_lock); | |
2852 | if (fp->fi_had_conflict) { | |
2853 | spin_unlock(&recall_lock); | |
2854 | return -EAGAIN; | |
2855 | } | |
2856 | atomic_inc(&fp->fi_delegees); | |
2857 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2858 | spin_unlock(&recall_lock); | |
2a74aba7 | 2859 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2860 | return 0; |
2861 | } | |
2862 | ||
4aa8913c BH |
2863 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2864 | { | |
2865 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2866 | if (status == -EAGAIN) | |
2867 | open->op_why_no_deleg = WND4_CONTENTION; | |
2868 | else { | |
2869 | open->op_why_no_deleg = WND4_RESOURCE; | |
2870 | switch (open->op_deleg_want) { | |
2871 | case NFS4_SHARE_WANT_READ_DELEG: | |
2872 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2873 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2874 | break; | |
2875 | case NFS4_SHARE_WANT_CANCEL: | |
2876 | open->op_why_no_deleg = WND4_CANCELLED; | |
2877 | break; | |
2878 | case NFS4_SHARE_WANT_NO_DELEG: | |
2879 | BUG(); /* not supposed to get here */ | |
2880 | } | |
2881 | } | |
2882 | } | |
2883 | ||
1da177e4 LT |
2884 | /* |
2885 | * Attempt to hand out a delegation. | |
2886 | */ | |
2887 | static void | |
dcef0413 | 2888 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2889 | { |
2890 | struct nfs4_delegation *dp; | |
fe0750e5 | 2891 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2892 | int cb_up; |
d24433cd | 2893 | int status = 0, flag = 0; |
1da177e4 | 2894 | |
fe0750e5 | 2895 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2896 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2897 | open->op_recall = 0; |
2898 | switch (open->op_claim_type) { | |
2899 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2900 | if (!cb_up) |
7b190fec N |
2901 | open->op_recall = 1; |
2902 | flag = open->op_delegate_type; | |
2903 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2904 | goto out; | |
2905 | break; | |
2906 | case NFS4_OPEN_CLAIM_NULL: | |
2907 | /* Let's not give out any delegations till everyone's | |
2908 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2909 | if (locks_in_grace()) |
7b190fec | 2910 | goto out; |
dad1c067 | 2911 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2912 | goto out; |
2913 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2914 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2915 | else | |
2916 | flag = NFS4_OPEN_DELEGATE_READ; | |
2917 | break; | |
2918 | default: | |
2919 | goto out; | |
2920 | } | |
1da177e4 | 2921 | |
fe0750e5 | 2922 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2923 | if (dp == NULL) |
2924 | goto out_no_deleg; | |
acfdf5c3 | 2925 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2926 | if (status) |
dd239cc0 | 2927 | goto out_free; |
1da177e4 | 2928 | |
d5477a8d | 2929 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2930 | |
8c10cbdb | 2931 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2932 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2933 | out: |
2934 | open->op_delegate_type = flag; | |
d24433cd BH |
2935 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2936 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2937 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2938 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2939 | ||
4aa8913c BH |
2940 | /* 4.1 client asking for a delegation? */ |
2941 | if (open->op_deleg_want) | |
2942 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 2943 | } |
dd239cc0 BF |
2944 | return; |
2945 | out_free: | |
acfdf5c3 | 2946 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2947 | out_no_deleg: |
2948 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2949 | goto out; | |
1da177e4 LT |
2950 | } |
2951 | ||
e27f49c3 BH |
2952 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
2953 | struct nfs4_delegation *dp) | |
2954 | { | |
2955 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
2956 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2957 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2958 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
2959 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
2960 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2961 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2962 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
2963 | } | |
2964 | /* Otherwise the client must be confused wanting a delegation | |
2965 | * it already has, therefore we don't return | |
2966 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
2967 | */ | |
2968 | } | |
2969 | ||
1da177e4 LT |
2970 | /* |
2971 | * called with nfs4_lock_state() held. | |
2972 | */ | |
b37ad28b | 2973 | __be32 |
1da177e4 LT |
2974 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2975 | { | |
6668958f | 2976 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 2977 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
2978 | struct nfs4_file *fp = NULL; |
2979 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2980 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2981 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2982 | __be32 status; |
1da177e4 | 2983 | |
1da177e4 LT |
2984 | /* |
2985 | * Lookup file; if found, lookup stateid and check open request, | |
2986 | * and check for delegations in the process of being recalled. | |
2987 | * If not found, create the nfs4_file struct | |
2988 | */ | |
2989 | fp = find_file(ino); | |
2990 | if (fp) { | |
2991 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2992 | goto out; | |
38c2f4b1 | 2993 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
2994 | if (status) |
2995 | goto out; | |
1da177e4 | 2996 | } else { |
c44c5eeb | 2997 | status = nfserr_bad_stateid; |
8b289b2c | 2998 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 2999 | goto out; |
3e772463 | 3000 | status = nfserr_jukebox; |
32513b40 BF |
3001 | fp = open->op_file; |
3002 | open->op_file = NULL; | |
3003 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3004 | } |
3005 | ||
3006 | /* | |
3007 | * OPEN the file, or upgrade an existing OPEN. | |
3008 | * If truncate fails, the OPEN fails. | |
3009 | */ | |
3010 | if (stp) { | |
3011 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3012 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3013 | if (status) |
3014 | goto out; | |
3015 | } else { | |
4cdc951b | 3016 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3017 | if (status) |
3018 | goto out; | |
3019 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3020 | if (status) |
1da177e4 | 3021 | goto out; |
4cdc951b BF |
3022 | stp = open->op_stp; |
3023 | open->op_stp = NULL; | |
996e0938 | 3024 | init_open_stateid(stp, fp, open); |
1da177e4 | 3025 | } |
dcef0413 BF |
3026 | update_stateid(&stp->st_stid.sc_stateid); |
3027 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3028 | |
d24433cd | 3029 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3030 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3031 | |
d24433cd BH |
3032 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3033 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3034 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3035 | goto nodeleg; | |
3036 | } | |
3037 | } | |
3038 | ||
1da177e4 LT |
3039 | /* |
3040 | * Attempt to hand out a delegation. No error return, because the | |
3041 | * OPEN succeeds even if we fail. | |
3042 | */ | |
3043 | nfs4_open_delegation(current_fh, open, stp); | |
d24433cd | 3044 | nodeleg: |
1da177e4 LT |
3045 | status = nfs_ok; |
3046 | ||
8c10cbdb | 3047 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3048 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3049 | out: |
d24433cd BH |
3050 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3051 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3052 | open->op_deleg_want) |
3053 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3054 | |
13cd2184 N |
3055 | if (fp) |
3056 | put_nfs4_file(fp); | |
37515177 | 3057 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3058 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3059 | /* |
3060 | * To finish the open response, we just need to set the rflags. | |
3061 | */ | |
3062 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3063 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3064 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3065 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3066 | ||
3067 | return status; | |
3068 | } | |
3069 | ||
d29b20cd BF |
3070 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3071 | { | |
3072 | if (open->op_openowner) { | |
3073 | struct nfs4_openowner *oo = open->op_openowner; | |
3074 | ||
3075 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3076 | list_del_init(&oo->oo_close_lru); | |
3077 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3078 | if (status) { | |
3079 | release_openowner(oo); | |
3080 | open->op_openowner = NULL; | |
3081 | } else | |
3082 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3083 | } | |
3084 | } | |
32513b40 BF |
3085 | if (open->op_file) |
3086 | nfsd4_free_file(open->op_file); | |
4cdc951b BF |
3087 | if (open->op_stp) |
3088 | nfs4_free_stateid(open->op_stp); | |
d29b20cd BF |
3089 | } |
3090 | ||
b37ad28b | 3091 | __be32 |
b591480b BF |
3092 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3093 | clientid_t *clid) | |
1da177e4 LT |
3094 | { |
3095 | struct nfs4_client *clp; | |
b37ad28b | 3096 | __be32 status; |
1da177e4 LT |
3097 | |
3098 | nfs4_lock_state(); | |
3099 | dprintk("process_renew(%08x/%08x): starting\n", | |
3100 | clid->cl_boot, clid->cl_id); | |
3101 | status = nfserr_stale_clientid; | |
3102 | if (STALE_CLIENTID(clid)) | |
3103 | goto out; | |
3104 | clp = find_confirmed_client(clid); | |
3105 | status = nfserr_expired; | |
3106 | if (clp == NULL) { | |
3107 | /* We assume the client took too long to RENEW. */ | |
3108 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3109 | goto out; | |
3110 | } | |
1da177e4 | 3111 | status = nfserr_cb_path_down; |
ea1da636 | 3112 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3113 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3114 | goto out; |
3115 | status = nfs_ok; | |
3116 | out: | |
3117 | nfs4_unlock_state(); | |
3118 | return status; | |
3119 | } | |
3120 | ||
33dcc481 JL |
3121 | static bool grace_ended; |
3122 | ||
a76b4319 | 3123 | static void |
5e1533c7 | 3124 | nfsd4_end_grace(struct net *net) |
a76b4319 | 3125 | { |
5e1533c7 SK |
3126 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
3127 | ||
33dcc481 JL |
3128 | /* do nothing if grace period already ended */ |
3129 | if (grace_ended) | |
3130 | return; | |
3131 | ||
a76b4319 | 3132 | dprintk("NFSD: end of grace period\n"); |
33dcc481 | 3133 | grace_ended = true; |
5e1533c7 SK |
3134 | nfsd4_record_grace_done(net, boot_time); |
3135 | locks_end_grace(&nn->nfsd4_manager); | |
e46b498c BF |
3136 | /* |
3137 | * Now that every NFSv4 client has had the chance to recover and | |
3138 | * to see the (possibly new, possibly shorter) lease time, we | |
3139 | * can safely set the next grace time to the current lease time: | |
3140 | */ | |
3141 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3142 | } |
3143 | ||
fd39ca9a | 3144 | static time_t |
1da177e4 LT |
3145 | nfs4_laundromat(void) |
3146 | { | |
3147 | struct nfs4_client *clp; | |
fe0750e5 | 3148 | struct nfs4_openowner *oo; |
1da177e4 LT |
3149 | struct nfs4_delegation *dp; |
3150 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3151 | time_t cutoff = get_seconds() - nfsd4_lease; |
3152 | time_t t, clientid_val = nfsd4_lease; | |
3153 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3154 | |
3155 | nfs4_lock_state(); | |
3156 | ||
3157 | dprintk("NFSD: laundromat service - starting\n"); | |
5e1533c7 | 3158 | nfsd4_end_grace(&init_net); |
36acb66b BH |
3159 | INIT_LIST_HEAD(&reaplist); |
3160 | spin_lock(&client_lock); | |
1da177e4 LT |
3161 | list_for_each_safe(pos, next, &client_lru) { |
3162 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3163 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3164 | t = clp->cl_time - cutoff; | |
3165 | if (clientid_val > t) | |
3166 | clientid_val = t; | |
3167 | break; | |
3168 | } | |
d7682988 BH |
3169 | if (atomic_read(&clp->cl_refcount)) { |
3170 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3171 | clp->cl_clientid.cl_id); | |
3172 | continue; | |
3173 | } | |
3174 | unhash_client_locked(clp); | |
3175 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3176 | } |
3177 | spin_unlock(&client_lock); | |
3178 | list_for_each_safe(pos, next, &reaplist) { | |
3179 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3180 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3181 | clp->cl_clientid.cl_id); | |
2a4317c5 | 3182 | nfsd4_client_record_remove(clp); |
1da177e4 LT |
3183 | expire_client(clp); |
3184 | } | |
1da177e4 LT |
3185 | spin_lock(&recall_lock); |
3186 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3187 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3188 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3189 | u = dp->dl_time - cutoff; | |
3190 | if (test_val > u) | |
3191 | test_val = u; | |
3192 | break; | |
3193 | } | |
1da177e4 LT |
3194 | list_move(&dp->dl_recall_lru, &reaplist); |
3195 | } | |
3196 | spin_unlock(&recall_lock); | |
3197 | list_for_each_safe(pos, next, &reaplist) { | |
3198 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3199 | unhash_delegation(dp); |
3200 | } | |
cf07d2ea | 3201 | test_val = nfsd4_lease; |
1da177e4 | 3202 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3203 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3204 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3205 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3206 | if (test_val > u) |
3207 | test_val = u; | |
3208 | break; | |
3209 | } | |
fe0750e5 | 3210 | release_openowner(oo); |
1da177e4 LT |
3211 | } |
3212 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3213 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3214 | nfs4_unlock_state(); | |
3215 | return clientid_val; | |
3216 | } | |
3217 | ||
a254b246 HH |
3218 | static struct workqueue_struct *laundry_wq; |
3219 | static void laundromat_main(struct work_struct *); | |
3220 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3221 | ||
3222 | static void | |
c4028958 | 3223 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3224 | { |
3225 | time_t t; | |
3226 | ||
3227 | t = nfs4_laundromat(); | |
3228 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3229 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3230 | } |
3231 | ||
f7a4d872 | 3232 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3233 | { |
f7a4d872 BF |
3234 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3235 | return nfserr_bad_stateid; | |
3236 | return nfs_ok; | |
1da177e4 LT |
3237 | } |
3238 | ||
3239 | static int | |
3240 | STALE_STATEID(stateid_t *stateid) | |
3241 | { | |
d3b313a4 | 3242 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3243 | return 0; |
3244 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3245 | STATEID_VAL(stateid)); |
e4e83ea4 | 3246 | return 1; |
1da177e4 LT |
3247 | } |
3248 | ||
3249 | static inline int | |
82c5ff1b | 3250 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3251 | { |
82c5ff1b JL |
3252 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3253 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3254 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3255 | } |
3256 | ||
3257 | static inline int | |
82c5ff1b | 3258 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3259 | { |
82c5ff1b JL |
3260 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3261 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3262 | } |
3263 | ||
3264 | static | |
dcef0413 | 3265 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3266 | { |
b37ad28b | 3267 | __be32 status = nfserr_openmode; |
1da177e4 | 3268 | |
02921914 BF |
3269 | /* For lock stateid's, we test the parent open, not the lock: */ |
3270 | if (stp->st_openstp) | |
3271 | stp = stp->st_openstp; | |
82c5ff1b | 3272 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3273 | goto out; |
82c5ff1b | 3274 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3275 | goto out; |
3276 | status = nfs_ok; | |
3277 | out: | |
3278 | return status; | |
3279 | } | |
3280 | ||
b37ad28b | 3281 | static inline __be32 |
1da177e4 LT |
3282 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3283 | { | |
203a8c8e | 3284 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3285 | return nfs_ok; |
af558e33 | 3286 | else if (locks_in_grace()) { |
25985edc | 3287 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3288 | * conflicting state; so we must wait out the grace period. */ |
3289 | return nfserr_grace; | |
3290 | } else if (flags & WR_STATE) | |
3291 | return nfs4_share_conflict(current_fh, | |
3292 | NFS4_SHARE_DENY_WRITE); | |
3293 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3294 | return nfs4_share_conflict(current_fh, | |
3295 | NFS4_SHARE_DENY_READ); | |
3296 | } | |
3297 | ||
3298 | /* | |
3299 | * Allow READ/WRITE during grace period on recovered state only for files | |
3300 | * that are not able to provide mandatory locking. | |
3301 | */ | |
3302 | static inline int | |
18f82731 | 3303 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3304 | { |
203a8c8e | 3305 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3306 | } |
3307 | ||
81b82965 BF |
3308 | /* Returns true iff a is later than b: */ |
3309 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3310 | { | |
3311 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3312 | } | |
3313 | ||
57b7b43b | 3314 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3315 | { |
6668958f AA |
3316 | /* |
3317 | * When sessions are used the stateid generation number is ignored | |
3318 | * when it is zero. | |
3319 | */ | |
28dde241 | 3320 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3321 | return nfs_ok; |
3322 | ||
3323 | if (in->si_generation == ref->si_generation) | |
3324 | return nfs_ok; | |
6668958f | 3325 | |
0836f587 | 3326 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3327 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3328 | return nfserr_bad_stateid; |
3329 | /* | |
81b82965 BF |
3330 | * However, we could see a stateid from the past, even from a |
3331 | * non-buggy client. For example, if the client sends a lock | |
3332 | * while some IO is outstanding, the lock may bump si_generation | |
3333 | * while the IO is still in flight. The client could avoid that | |
3334 | * situation by waiting for responses on all the IO requests, | |
3335 | * but better performance may result in retrying IO that | |
3336 | * receives an old_stateid error if requests are rarely | |
3337 | * reordered in flight: | |
0836f587 | 3338 | */ |
81b82965 | 3339 | return nfserr_old_stateid; |
0836f587 BF |
3340 | } |
3341 | ||
7df302f7 | 3342 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3343 | { |
97b7e3b6 BF |
3344 | struct nfs4_stid *s; |
3345 | struct nfs4_ol_stateid *ols; | |
3346 | __be32 status; | |
17456804 | 3347 | |
7df302f7 CL |
3348 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3349 | return nfserr_bad_stateid; | |
3350 | /* Client debugging aid. */ | |
3351 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3352 | char addr_str[INET6_ADDRSTRLEN]; | |
3353 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3354 | sizeof(addr_str)); | |
3355 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3356 | "with incorrect client ID\n", addr_str); | |
3357 | return nfserr_bad_stateid; | |
3358 | } | |
38c2f4b1 | 3359 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3360 | if (!s) |
7df302f7 | 3361 | return nfserr_bad_stateid; |
36279ac1 | 3362 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3363 | if (status) |
97b7e3b6 BF |
3364 | return status; |
3365 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3366 | return nfs_ok; | |
3367 | ols = openlockstateid(s); | |
3368 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3369 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3370 | return nfserr_bad_stateid; |
3371 | return nfs_ok; | |
17456804 BS |
3372 | } |
3373 | ||
38c2f4b1 BF |
3374 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) |
3375 | { | |
3376 | struct nfs4_client *cl; | |
3377 | ||
3378 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3379 | return nfserr_bad_stateid; | |
3380 | if (STALE_STATEID(stateid)) | |
3381 | return nfserr_stale_stateid; | |
3382 | cl = find_confirmed_client(&stateid->si_opaque.so_clid); | |
3383 | if (!cl) | |
3384 | return nfserr_expired; | |
3385 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3386 | if (!*s) | |
3387 | return nfserr_bad_stateid; | |
3388 | return nfs_ok; | |
3389 | ||
3390 | } | |
3391 | ||
1da177e4 LT |
3392 | /* |
3393 | * Checks for stateid operations | |
3394 | */ | |
b37ad28b | 3395 | __be32 |
dd453dfd BH |
3396 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3397 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3398 | { |
69064a27 | 3399 | struct nfs4_stid *s; |
dcef0413 | 3400 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3401 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3402 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3403 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3404 | __be32 status; |
1da177e4 | 3405 | |
1da177e4 LT |
3406 | if (filpp) |
3407 | *filpp = NULL; | |
3408 | ||
18f82731 | 3409 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3410 | return nfserr_grace; |
3411 | ||
3412 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3413 | return check_special_stateids(current_fh, stateid, flags); | |
3414 | ||
38c2f4b1 BF |
3415 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); |
3416 | if (status) | |
3417 | return status; | |
69064a27 BF |
3418 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3419 | if (status) | |
3420 | goto out; | |
f7a4d872 BF |
3421 | switch (s->sc_type) { |
3422 | case NFS4_DELEG_STID: | |
69064a27 | 3423 | dp = delegstateid(s); |
dc9bf700 BF |
3424 | status = nfs4_check_delegmode(dp, flags); |
3425 | if (status) | |
3426 | goto out; | |
43b0178e | 3427 | if (filpp) { |
acfdf5c3 | 3428 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3429 | BUG_ON(!*filpp); |
3430 | } | |
f7a4d872 BF |
3431 | break; |
3432 | case NFS4_OPEN_STID: | |
3433 | case NFS4_LOCK_STID: | |
69064a27 | 3434 | stp = openlockstateid(s); |
f7a4d872 BF |
3435 | status = nfs4_check_fh(current_fh, stp); |
3436 | if (status) | |
1da177e4 | 3437 | goto out; |
fe0750e5 | 3438 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3439 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3440 | goto out; |
a4455be0 BF |
3441 | status = nfs4_check_openmode(stp, flags); |
3442 | if (status) | |
1da177e4 | 3443 | goto out; |
f9d7562f BF |
3444 | if (filpp) { |
3445 | if (flags & RD_STATE) | |
3446 | *filpp = find_readable_file(stp->st_file); | |
3447 | else | |
3448 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3449 | } |
f7a4d872 BF |
3450 | break; |
3451 | default: | |
3452 | return nfserr_bad_stateid; | |
1da177e4 LT |
3453 | } |
3454 | status = nfs_ok; | |
3455 | out: | |
3456 | return status; | |
3457 | } | |
3458 | ||
e1ca12df | 3459 | static __be32 |
dcef0413 | 3460 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3461 | { |
fe0750e5 | 3462 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3463 | return nfserr_locks_held; |
3464 | release_lock_stateid(stp); | |
3465 | return nfs_ok; | |
3466 | } | |
3467 | ||
17456804 BS |
3468 | /* |
3469 | * Test if the stateid is valid | |
3470 | */ | |
3471 | __be32 | |
3472 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3473 | struct nfsd4_test_stateid *test_stateid) | |
3474 | { | |
03cfb420 BS |
3475 | struct nfsd4_test_stateid_id *stateid; |
3476 | struct nfs4_client *cl = cstate->session->se_client; | |
3477 | ||
3478 | nfs4_lock_state(); | |
3479 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3480 | stateid->ts_id_status = |
3481 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3482 | nfs4_unlock_state(); |
3483 | ||
17456804 BS |
3484 | return nfs_ok; |
3485 | } | |
3486 | ||
e1ca12df BS |
3487 | __be32 |
3488 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3489 | struct nfsd4_free_stateid *free_stateid) | |
3490 | { | |
3491 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3492 | struct nfs4_stid *s; |
38c2f4b1 | 3493 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3494 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3495 | |
3496 | nfs4_lock_state(); | |
38c2f4b1 | 3497 | s = find_stateid(cl, stateid); |
2da1cec7 | 3498 | if (!s) |
81b82965 | 3499 | goto out; |
2da1cec7 BF |
3500 | switch (s->sc_type) { |
3501 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3502 | ret = nfserr_locks_held; |
3503 | goto out; | |
2da1cec7 BF |
3504 | case NFS4_OPEN_STID: |
3505 | case NFS4_LOCK_STID: | |
3506 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3507 | if (ret) | |
3508 | goto out; | |
3509 | if (s->sc_type == NFS4_LOCK_STID) | |
3510 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3511 | else | |
3512 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3513 | break; |
3514 | default: | |
3515 | ret = nfserr_bad_stateid; | |
e1ca12df | 3516 | } |
e1ca12df BS |
3517 | out: |
3518 | nfs4_unlock_state(); | |
3519 | return ret; | |
3520 | } | |
3521 | ||
4c4cd222 N |
3522 | static inline int |
3523 | setlkflg (int type) | |
3524 | { | |
3525 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3526 | RD_STATE : WR_STATE; | |
3527 | } | |
1da177e4 | 3528 | |
dcef0413 | 3529 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3530 | { |
3531 | struct svc_fh *current_fh = &cstate->current_fh; | |
3532 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3533 | __be32 status; | |
3534 | ||
c0a5d93e BF |
3535 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3536 | if (status) | |
3537 | return status; | |
f7a4d872 BF |
3538 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3539 | /* | |
3540 | * "Closed" stateid's exist *only* to return | |
3541 | * nfserr_replay_me from the previous step. | |
3542 | */ | |
3543 | return nfserr_bad_stateid; | |
3544 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3545 | if (status) | |
3546 | return status; | |
3547 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3548 | } |
3549 | ||
1da177e4 LT |
3550 | /* |
3551 | * Checks for sequence id mutating operations. | |
3552 | */ | |
b37ad28b | 3553 | static __be32 |
dd453dfd | 3554 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3555 | stateid_t *stateid, char typemask, |
dcef0413 | 3556 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3557 | { |
0836f587 | 3558 | __be32 status; |
38c2f4b1 | 3559 | struct nfs4_stid *s; |
1da177e4 | 3560 | |
8c10cbdb BH |
3561 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3562 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3563 | |
1da177e4 | 3564 | *stpp = NULL; |
38c2f4b1 | 3565 | status = nfsd4_lookup_stateid(stateid, typemask, &s); |
c0a5d93e BF |
3566 | if (status) |
3567 | return status; | |
38c2f4b1 | 3568 | *stpp = openlockstateid(s); |
c0a5d93e | 3569 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3570 | |
c0a5d93e BF |
3571 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3572 | } | |
39325bd0 | 3573 | |
dcef0413 | 3574 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3575 | { |
3576 | __be32 status; | |
3577 | struct nfs4_openowner *oo; | |
1da177e4 | 3578 | |
c0a5d93e | 3579 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3580 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3581 | if (status) |
3582 | return status; | |
c0a5d93e | 3583 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3584 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3585 | return nfserr_bad_stateid; |
3a4f98bb | 3586 | return nfs_ok; |
1da177e4 LT |
3587 | } |
3588 | ||
b37ad28b | 3589 | __be32 |
ca364317 | 3590 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3591 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3592 | { |
b37ad28b | 3593 | __be32 status; |
fe0750e5 | 3594 | struct nfs4_openowner *oo; |
dcef0413 | 3595 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3596 | |
3597 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3598 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3599 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3600 | |
ca364317 | 3601 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3602 | if (status) |
3603 | return status; | |
1da177e4 LT |
3604 | |
3605 | nfs4_lock_state(); | |
3606 | ||
9072d5c6 | 3607 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3608 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3609 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3610 | if (status) |
68b66e82 | 3611 | goto out; |
fe0750e5 | 3612 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3613 | status = nfserr_bad_stateid; |
dad1c067 | 3614 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3615 | goto out; |
dad1c067 | 3616 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3617 | update_stateid(&stp->st_stid.sc_stateid); |
3618 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3619 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3620 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3621 | |
2a4317c5 | 3622 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3623 | status = nfs_ok; |
1da177e4 | 3624 | out: |
5ec094c1 BF |
3625 | if (!cstate->replay_owner) |
3626 | nfs4_unlock_state(); | |
1da177e4 LT |
3627 | return status; |
3628 | } | |
3629 | ||
6409a5a6 | 3630 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3631 | { |
82c5ff1b | 3632 | if (!test_access(access, stp)) |
6409a5a6 BF |
3633 | return; |
3634 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3635 | clear_access(access, stp); |
6409a5a6 | 3636 | } |
f197c271 | 3637 | |
6409a5a6 BF |
3638 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3639 | { | |
3640 | switch (to_access) { | |
3641 | case NFS4_SHARE_ACCESS_READ: | |
3642 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3643 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3644 | break; | |
3645 | case NFS4_SHARE_ACCESS_WRITE: | |
3646 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3647 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3648 | break; | |
3649 | case NFS4_SHARE_ACCESS_BOTH: | |
3650 | break; | |
3651 | default: | |
3652 | BUG(); | |
1da177e4 LT |
3653 | } |
3654 | } | |
3655 | ||
3656 | static void | |
ce0fc43c | 3657 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3658 | { |
3659 | int i; | |
3660 | for (i = 0; i < 4; i++) { | |
3661 | if ((i & deny) != i) | |
ce0fc43c | 3662 | clear_deny(i, stp); |
1da177e4 LT |
3663 | } |
3664 | } | |
3665 | ||
b37ad28b | 3666 | __be32 |
ca364317 BF |
3667 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3668 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3669 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3670 | { |
b37ad28b | 3671 | __be32 status; |
dcef0413 | 3672 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3673 | |
3674 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3675 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3676 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3677 | |
c30e92df | 3678 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3679 | if (od->od_deleg_want) |
3680 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3681 | od->od_deleg_want); | |
1da177e4 LT |
3682 | |
3683 | nfs4_lock_state(); | |
c0a5d93e BF |
3684 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3685 | &od->od_stateid, &stp); | |
9072d5c6 | 3686 | if (status) |
1da177e4 | 3687 | goto out; |
1da177e4 | 3688 | status = nfserr_inval; |
82c5ff1b JL |
3689 | if (!test_access(od->od_share_access, stp)) { |
3690 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3691 | stp->st_access_bmap, od->od_share_access); |
3692 | goto out; | |
3693 | } | |
ce0fc43c | 3694 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3695 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3696 | stp->st_deny_bmap, od->od_share_deny); | |
3697 | goto out; | |
3698 | } | |
6409a5a6 | 3699 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3700 | |
ce0fc43c | 3701 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3702 | |
dcef0413 BF |
3703 | update_stateid(&stp->st_stid.sc_stateid); |
3704 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3705 | status = nfs_ok; |
3706 | out: | |
5ec094c1 BF |
3707 | if (!cstate->replay_owner) |
3708 | nfs4_unlock_state(); | |
1da177e4 LT |
3709 | return status; |
3710 | } | |
3711 | ||
38c387b5 BF |
3712 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3713 | { | |
3714 | struct nfs4_openowner *oo; | |
3715 | struct nfs4_ol_stateid *s; | |
3716 | ||
3717 | if (!so->so_is_open_owner) | |
3718 | return; | |
3719 | oo = openowner(so); | |
3720 | s = oo->oo_last_closed_stid; | |
3721 | if (!s) | |
3722 | return; | |
3723 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3724 | /* Release the last_closed_stid on the next seqid bump: */ | |
3725 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3726 | return; | |
3727 | } | |
3728 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3729 | release_last_closed_stateid(oo); |
3730 | } | |
3731 | ||
3732 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3733 | { | |
3734 | unhash_open_stateid(s); | |
3735 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3736 | } |
3737 | ||
1da177e4 LT |
3738 | /* |
3739 | * nfs4_unlock_state() called after encode | |
3740 | */ | |
b37ad28b | 3741 | __be32 |
ca364317 | 3742 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3743 | struct nfsd4_close *close) |
1da177e4 | 3744 | { |
b37ad28b | 3745 | __be32 status; |
fe0750e5 | 3746 | struct nfs4_openowner *oo; |
dcef0413 | 3747 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3748 | |
3749 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3750 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3751 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3752 | |
3753 | nfs4_lock_state(); | |
f7a4d872 BF |
3754 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3755 | &close->cl_stateid, | |
3756 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3757 | &stp); | |
9072d5c6 | 3758 | if (status) |
1da177e4 | 3759 | goto out; |
fe0750e5 | 3760 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3761 | status = nfs_ok; |
dcef0413 BF |
3762 | update_stateid(&stp->st_stid.sc_stateid); |
3763 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3764 | |
f7a4d872 | 3765 | nfsd4_close_open_stateid(stp); |
38c387b5 | 3766 | oo->oo_last_closed_stid = stp; |
04ef5954 | 3767 | |
74dbafaf BF |
3768 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3769 | if (cstate->minorversion) { | |
3770 | release_openowner(oo); | |
3771 | cstate->replay_owner = NULL; | |
3772 | } else { | |
3773 | /* | |
3774 | * In the 4.0 case we need to keep the owners around a | |
3775 | * little while to handle CLOSE replay. | |
3776 | */ | |
3777 | if (list_empty(&oo->oo_owner.so_stateids)) | |
3778 | move_to_close_lru(oo); | |
3779 | } | |
3780 | } | |
1da177e4 | 3781 | out: |
5ec094c1 BF |
3782 | if (!cstate->replay_owner) |
3783 | nfs4_unlock_state(); | |
1da177e4 LT |
3784 | return status; |
3785 | } | |
3786 | ||
b37ad28b | 3787 | __be32 |
ca364317 BF |
3788 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3789 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3790 | { |
203a8c8e BF |
3791 | struct nfs4_delegation *dp; |
3792 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3793 | struct nfs4_stid *s; |
203a8c8e | 3794 | struct inode *inode; |
b37ad28b | 3795 | __be32 status; |
1da177e4 | 3796 | |
ca364317 | 3797 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3798 | return status; |
3799 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3800 | |
3801 | nfs4_lock_state(); | |
38c2f4b1 BF |
3802 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); |
3803 | if (status) | |
203a8c8e | 3804 | goto out; |
38c2f4b1 | 3805 | dp = delegstateid(s); |
d5477a8d | 3806 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3807 | if (status) |
3808 | goto out; | |
203a8c8e BF |
3809 | |
3810 | unhash_delegation(dp); | |
1da177e4 | 3811 | out: |
203a8c8e BF |
3812 | nfs4_unlock_state(); |
3813 | ||
1da177e4 LT |
3814 | return status; |
3815 | } | |
3816 | ||
3817 | ||
1da177e4 | 3818 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3819 | |
009673b4 BF |
3820 | #define LOCKOWNER_INO_HASH_BITS 8 |
3821 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3822 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3823 | |
87df4de8 BH |
3824 | static inline u64 |
3825 | end_offset(u64 start, u64 len) | |
3826 | { | |
3827 | u64 end; | |
3828 | ||
3829 | end = start + len; | |
3830 | return end >= start ? end: NFS4_MAX_UINT64; | |
3831 | } | |
3832 | ||
3833 | /* last octet in a range */ | |
3834 | static inline u64 | |
3835 | last_byte_offset(u64 start, u64 len) | |
3836 | { | |
3837 | u64 end; | |
3838 | ||
3839 | BUG_ON(!len); | |
3840 | end = start + len; | |
3841 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3842 | } | |
3843 | ||
009673b4 | 3844 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3845 | { |
3846 | return (file_hashval(inode) + cl_id | |
3847 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3848 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3849 | } |
3850 | ||
009673b4 | 3851 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3852 | |
1da177e4 LT |
3853 | /* |
3854 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3855 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3856 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3857 | * locking, this prevents us from being completely protocol-compliant. The | |
3858 | * real solution to this problem is to start using unsigned file offsets in | |
3859 | * the VFS, but this is a very deep change! | |
3860 | */ | |
3861 | static inline void | |
3862 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3863 | { | |
3864 | if (lock->fl_start < 0) | |
3865 | lock->fl_start = OFFSET_MAX; | |
3866 | if (lock->fl_end < 0) | |
3867 | lock->fl_end = OFFSET_MAX; | |
3868 | } | |
3869 | ||
d5b9026a N |
3870 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3871 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3872 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3873 | }; |
1da177e4 LT |
3874 | |
3875 | static inline void | |
3876 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3877 | { | |
fe0750e5 | 3878 | struct nfs4_lockowner *lo; |
1da177e4 | 3879 | |
d5b9026a | 3880 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3881 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3882 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3883 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3884 | if (!deny->ld_owner.data) |
3885 | /* We just don't care that much */ | |
3886 | goto nevermind; | |
fe0750e5 BF |
3887 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3888 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3889 | } else { |
7c13f344 BF |
3890 | nevermind: |
3891 | deny->ld_owner.len = 0; | |
3892 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3893 | deny->ld_clientid.cl_boot = 0; |
3894 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3895 | } |
3896 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3897 | deny->ld_length = NFS4_MAX_UINT64; |
3898 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3899 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3900 | deny->ld_type = NFS4_READ_LT; | |
3901 | if (fl->fl_type != F_RDLCK) | |
3902 | deny->ld_type = NFS4_WRITE_LT; | |
3903 | } | |
3904 | ||
b93d87c1 BF |
3905 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3906 | { | |
3907 | struct nfs4_ol_stateid *lst; | |
3908 | ||
3909 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3910 | return false; | |
3911 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3912 | struct nfs4_ol_stateid, st_perstateowner); | |
3913 | return lst->st_file->fi_inode == inode; | |
3914 | } | |
3915 | ||
fe0750e5 BF |
3916 | static struct nfs4_lockowner * |
3917 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3918 | struct xdr_netobj *owner) |
3919 | { | |
009673b4 | 3920 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3921 | struct nfs4_lockowner *lo; |
1da177e4 | 3922 | |
009673b4 | 3923 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3924 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3925 | return lo; | |
1da177e4 LT |
3926 | } |
3927 | return NULL; | |
3928 | } | |
3929 | ||
dcef0413 | 3930 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3931 | { |
009673b4 BF |
3932 | struct inode *inode = open_stp->st_file->fi_inode; |
3933 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3934 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3935 | ||
16bfdaaf | 3936 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3937 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3938 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3939 | } |
3940 | ||
1da177e4 LT |
3941 | /* |
3942 | * Alloc a lock owner structure. | |
3943 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3944 | * occurred. |
1da177e4 | 3945 | * |
16bfdaaf | 3946 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3947 | */ |
3948 | ||
fe0750e5 | 3949 | static struct nfs4_lockowner * |
dcef0413 | 3950 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3951 | struct nfs4_lockowner *lo; |
1da177e4 | 3952 | |
fe0750e5 BF |
3953 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3954 | if (!lo) | |
1da177e4 | 3955 | return NULL; |
fe0750e5 BF |
3956 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3957 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3958 | /* It is the openowner seqid that will be incremented in encode in the |
3959 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3960 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3961 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3962 | return lo; | |
1da177e4 LT |
3963 | } |
3964 | ||
dcef0413 BF |
3965 | static struct nfs4_ol_stateid * |
3966 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3967 | { |
dcef0413 | 3968 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3969 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 3970 | |
996e0938 | 3971 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 3972 | if (stp == NULL) |
6136d2b4 | 3973 | return NULL; |
996e0938 | 3974 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 3975 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3976 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3977 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 3978 | get_nfs4_file(fp); |
1da177e4 | 3979 | stp->st_file = fp; |
0997b173 | 3980 | stp->st_access_bmap = 0; |
1da177e4 | 3981 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3982 | stp->st_openstp = open_stp; |
1da177e4 LT |
3983 | return stp; |
3984 | } | |
3985 | ||
fd39ca9a | 3986 | static int |
1da177e4 LT |
3987 | check_lock_length(u64 offset, u64 length) |
3988 | { | |
87df4de8 | 3989 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3990 | LOFF_OVERFLOW(offset, length))); |
3991 | } | |
3992 | ||
dcef0413 | 3993 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3994 | { |
3995 | struct nfs4_file *fp = lock_stp->st_file; | |
3996 | int oflag = nfs4_access_to_omode(access); | |
3997 | ||
82c5ff1b | 3998 | if (test_access(access, lock_stp)) |
0997b173 BF |
3999 | return; |
4000 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4001 | set_access(access, lock_stp); |
0997b173 BF |
4002 | } |
4003 | ||
2355c596 | 4004 | static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new) |
64a284d0 BF |
4005 | { |
4006 | struct nfs4_file *fi = ost->st_file; | |
4007 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4008 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4009 | struct nfs4_lockowner *lo; | |
4010 | unsigned int strhashval; | |
4011 | ||
4012 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
4013 | if (lo) { | |
4014 | if (!cstate->minorversion) | |
4015 | return nfserr_bad_seqid; | |
4016 | /* XXX: a lockowner always has exactly one stateid: */ | |
4017 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4018 | struct nfs4_ol_stateid, st_perstateowner); | |
4019 | return nfs_ok; | |
4020 | } | |
16bfdaaf | 4021 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4022 | &lock->v.new.owner); |
4023 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4024 | if (lo == NULL) | |
4025 | return nfserr_jukebox; | |
4026 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4027 | if (*lst == NULL) { | |
4028 | release_lockowner(lo); | |
4029 | return nfserr_jukebox; | |
4030 | } | |
4031 | *new = true; | |
4032 | return nfs_ok; | |
4033 | } | |
4034 | ||
1da177e4 LT |
4035 | /* |
4036 | * LOCK operation | |
4037 | */ | |
b37ad28b | 4038 | __be32 |
ca364317 | 4039 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4040 | struct nfsd4_lock *lock) |
1da177e4 | 4041 | { |
fe0750e5 BF |
4042 | struct nfs4_openowner *open_sop = NULL; |
4043 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4044 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4045 | struct file *filp = NULL; |
1da177e4 | 4046 | struct file_lock file_lock; |
8dc7c311 | 4047 | struct file_lock conflock; |
b37ad28b | 4048 | __be32 status = 0; |
64a284d0 | 4049 | bool new_state = false; |
b34f27aa | 4050 | int lkflg; |
b8dd7b9a | 4051 | int err; |
1da177e4 LT |
4052 | |
4053 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4054 | (long long) lock->lk_offset, | |
4055 | (long long) lock->lk_length); | |
4056 | ||
1da177e4 LT |
4057 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4058 | return nfserr_inval; | |
4059 | ||
ca364317 | 4060 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4061 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4062 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4063 | return status; | |
4064 | } | |
4065 | ||
1da177e4 LT |
4066 | nfs4_lock_state(); |
4067 | ||
4068 | if (lock->lk_is_new) { | |
dcef0413 | 4069 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4070 | |
4071 | if (nfsd4_has_session(cstate)) | |
4072 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4073 | memcpy(&lock->v.new.clientid, | |
4074 | &cstate->session->se_client->cl_clientid, | |
4075 | sizeof(clientid_t)); | |
4076 | ||
1da177e4 | 4077 | status = nfserr_stale_clientid; |
684e5638 | 4078 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 4079 | goto out; |
1da177e4 | 4080 | |
1da177e4 | 4081 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4082 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4083 | lock->lk_new_open_seqid, |
4084 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4085 | &open_stp); |
37515177 | 4086 | if (status) |
1da177e4 | 4087 | goto out; |
fe0750e5 | 4088 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4089 | status = nfserr_bad_stateid; |
684e5638 | 4090 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4091 | &lock->v.new.clientid)) |
4092 | goto out; | |
64a284d0 BF |
4093 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4094 | &lock_stp, &new_state); | |
e1aaa891 | 4095 | } else |
dd453dfd | 4096 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4097 | lock->lk_old_lock_seqid, |
4098 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4099 | NFS4_LOCK_STID, &lock_stp); |
e1aaa891 BF |
4100 | if (status) |
4101 | goto out; | |
64a284d0 | 4102 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4103 | |
b34f27aa BF |
4104 | lkflg = setlkflg(lock->lk_type); |
4105 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4106 | if (status) | |
4107 | goto out; | |
4108 | ||
0dd395dc | 4109 | status = nfserr_grace; |
af558e33 | 4110 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4111 | goto out; |
4112 | status = nfserr_no_grace; | |
af558e33 | 4113 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4114 | goto out; |
4115 | ||
1da177e4 LT |
4116 | locks_init_lock(&file_lock); |
4117 | switch (lock->lk_type) { | |
4118 | case NFS4_READ_LT: | |
4119 | case NFS4_READW_LT: | |
0997b173 BF |
4120 | filp = find_readable_file(lock_stp->st_file); |
4121 | if (filp) | |
4122 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4123 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4124 | break; |
1da177e4 LT |
4125 | case NFS4_WRITE_LT: |
4126 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4127 | filp = find_writeable_file(lock_stp->st_file); |
4128 | if (filp) | |
4129 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4130 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4131 | break; |
1da177e4 LT |
4132 | default: |
4133 | status = nfserr_inval; | |
4134 | goto out; | |
4135 | } | |
f9d7562f BF |
4136 | if (!filp) { |
4137 | status = nfserr_openmode; | |
4138 | goto out; | |
4139 | } | |
b59e3c0e | 4140 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4141 | file_lock.fl_pid = current->tgid; |
4142 | file_lock.fl_file = filp; | |
4143 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4144 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4145 | |
4146 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4147 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4148 | nfs4_transform_lock_offset(&file_lock); |
4149 | ||
4150 | /* | |
4151 | * Try to lock the file in the VFS. | |
4152 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4153 | */ | |
4154 | ||
529d7b2a | 4155 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4156 | switch (-err) { |
1da177e4 | 4157 | case 0: /* success! */ |
dcef0413 BF |
4158 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4159 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4160 | sizeof(stateid_t)); |
b8dd7b9a | 4161 | status = 0; |
eb76b3fd AA |
4162 | break; |
4163 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4164 | status = nfserr_denied; | |
4165 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4166 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4167 | break; | |
1da177e4 LT |
4168 | case (EDEADLK): |
4169 | status = nfserr_deadlock; | |
eb76b3fd | 4170 | break; |
3e772463 | 4171 | default: |
fd85b817 | 4172 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4173 | status = nfserrno(err); |
eb76b3fd | 4174 | break; |
1da177e4 | 4175 | } |
1da177e4 | 4176 | out: |
64a284d0 | 4177 | if (status && new_state) |
f044ff83 | 4178 | release_lockowner(lock_sop); |
5ec094c1 BF |
4179 | if (!cstate->replay_owner) |
4180 | nfs4_unlock_state(); | |
1da177e4 LT |
4181 | return status; |
4182 | } | |
4183 | ||
55ef1274 BF |
4184 | /* |
4185 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4186 | * so we do a temporary open here just to get an open file to pass to | |
4187 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4188 | * inode operation.) | |
4189 | */ | |
04da6e9d | 4190 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4191 | { |
4192 | struct file *file; | |
04da6e9d AV |
4193 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4194 | if (!err) { | |
4195 | err = nfserrno(vfs_test_lock(file, lock)); | |
4196 | nfsd_close(file); | |
4197 | } | |
55ef1274 BF |
4198 | return err; |
4199 | } | |
4200 | ||
1da177e4 LT |
4201 | /* |
4202 | * LOCKT operation | |
4203 | */ | |
b37ad28b | 4204 | __be32 |
ca364317 BF |
4205 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4206 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4207 | { |
4208 | struct inode *inode; | |
1da177e4 | 4209 | struct file_lock file_lock; |
fe0750e5 | 4210 | struct nfs4_lockowner *lo; |
b37ad28b | 4211 | __be32 status; |
1da177e4 | 4212 | |
af558e33 | 4213 | if (locks_in_grace()) |
1da177e4 LT |
4214 | return nfserr_grace; |
4215 | ||
4216 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4217 | return nfserr_inval; | |
4218 | ||
1da177e4 LT |
4219 | nfs4_lock_state(); |
4220 | ||
4221 | status = nfserr_stale_clientid; | |
60adfc50 | 4222 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4223 | goto out; |
1da177e4 | 4224 | |
75c096f7 | 4225 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4226 | goto out; |
1da177e4 | 4227 | |
ca364317 | 4228 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4229 | locks_init_lock(&file_lock); |
4230 | switch (lockt->lt_type) { | |
4231 | case NFS4_READ_LT: | |
4232 | case NFS4_READW_LT: | |
4233 | file_lock.fl_type = F_RDLCK; | |
4234 | break; | |
4235 | case NFS4_WRITE_LT: | |
4236 | case NFS4_WRITEW_LT: | |
4237 | file_lock.fl_type = F_WRLCK; | |
4238 | break; | |
4239 | default: | |
2fdada03 | 4240 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4241 | status = nfserr_inval; |
4242 | goto out; | |
4243 | } | |
4244 | ||
fe0750e5 BF |
4245 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4246 | if (lo) | |
4247 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4248 | file_lock.fl_pid = current->tgid; |
4249 | file_lock.fl_flags = FL_POSIX; | |
4250 | ||
4251 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4252 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4253 | |
4254 | nfs4_transform_lock_offset(&file_lock); | |
4255 | ||
04da6e9d AV |
4256 | status = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
4257 | if (status) | |
fd85b817 | 4258 | goto out; |
04da6e9d | 4259 | |
9d6a8c5c | 4260 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4261 | status = nfserr_denied; |
9d6a8c5c | 4262 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4263 | } |
4264 | out: | |
4265 | nfs4_unlock_state(); | |
4266 | return status; | |
4267 | } | |
4268 | ||
b37ad28b | 4269 | __be32 |
ca364317 | 4270 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4271 | struct nfsd4_locku *locku) |
1da177e4 | 4272 | { |
dcef0413 | 4273 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4274 | struct file *filp = NULL; |
4275 | struct file_lock file_lock; | |
b37ad28b | 4276 | __be32 status; |
b8dd7b9a | 4277 | int err; |
1da177e4 LT |
4278 | |
4279 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4280 | (long long) locku->lu_offset, | |
4281 | (long long) locku->lu_length); | |
4282 | ||
4283 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4284 | return nfserr_inval; | |
4285 | ||
4286 | nfs4_lock_state(); | |
4287 | ||
9072d5c6 | 4288 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4289 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4290 | if (status) |
1da177e4 | 4291 | goto out; |
f9d7562f BF |
4292 | filp = find_any_file(stp->st_file); |
4293 | if (!filp) { | |
4294 | status = nfserr_lock_range; | |
4295 | goto out; | |
4296 | } | |
1da177e4 LT |
4297 | BUG_ON(!filp); |
4298 | locks_init_lock(&file_lock); | |
4299 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4300 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4301 | file_lock.fl_pid = current->tgid; |
4302 | file_lock.fl_file = filp; | |
4303 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4304 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4305 | file_lock.fl_start = locku->lu_offset; |
4306 | ||
87df4de8 | 4307 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4308 | nfs4_transform_lock_offset(&file_lock); |
4309 | ||
4310 | /* | |
4311 | * Try to unlock the file in the VFS. | |
4312 | */ | |
fd85b817 | 4313 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4314 | if (err) { |
fd85b817 | 4315 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4316 | goto out_nfserr; |
4317 | } | |
4318 | /* | |
4319 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4320 | */ | |
dcef0413 BF |
4321 | update_stateid(&stp->st_stid.sc_stateid); |
4322 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4323 | |
4324 | out: | |
71c3bcd7 BF |
4325 | if (!cstate->replay_owner) |
4326 | nfs4_unlock_state(); | |
1da177e4 LT |
4327 | return status; |
4328 | ||
4329 | out_nfserr: | |
b8dd7b9a | 4330 | status = nfserrno(err); |
1da177e4 LT |
4331 | goto out; |
4332 | } | |
4333 | ||
4334 | /* | |
4335 | * returns | |
4336 | * 1: locks held by lockowner | |
4337 | * 0: no locks held by lockowner | |
4338 | */ | |
4339 | static int | |
fe0750e5 | 4340 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4341 | { |
4342 | struct file_lock **flpp; | |
f9d7562f | 4343 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4344 | int status = 0; |
4345 | ||
b89f4321 | 4346 | lock_flocks(); |
1da177e4 | 4347 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4348 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4349 | status = 1; |
4350 | goto out; | |
796dadfd | 4351 | } |
1da177e4 LT |
4352 | } |
4353 | out: | |
b89f4321 | 4354 | unlock_flocks(); |
1da177e4 LT |
4355 | return status; |
4356 | } | |
4357 | ||
b37ad28b | 4358 | __be32 |
b591480b BF |
4359 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4360 | struct nfsd4_compound_state *cstate, | |
4361 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4362 | { |
4363 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4364 | struct nfs4_stateowner *sop; |
fe0750e5 | 4365 | struct nfs4_lockowner *lo; |
dcef0413 | 4366 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4367 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4368 | struct list_head matches; |
16bfdaaf | 4369 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4370 | __be32 status; |
1da177e4 LT |
4371 | |
4372 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4373 | clid->cl_boot, clid->cl_id); | |
4374 | ||
4375 | /* XXX check for lease expiration */ | |
4376 | ||
4377 | status = nfserr_stale_clientid; | |
849823c5 | 4378 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4379 | return status; |
1da177e4 LT |
4380 | |
4381 | nfs4_lock_state(); | |
4382 | ||
3e9e3dbe | 4383 | status = nfserr_locks_held; |
3e9e3dbe | 4384 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4385 | |
16bfdaaf BF |
4386 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4387 | if (sop->so_is_open_owner) | |
4388 | continue; | |
06f1f864 BF |
4389 | if (!same_owner_str(sop, owner, clid)) |
4390 | continue; | |
4391 | list_for_each_entry(stp, &sop->so_stateids, | |
4392 | st_perstateowner) { | |
4393 | lo = lockowner(sop); | |
4394 | if (check_for_locks(stp->st_file, lo)) | |
4395 | goto out; | |
4396 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4397 | } |
3e9e3dbe N |
4398 | } |
4399 | /* Clients probably won't expect us to return with some (but not all) | |
4400 | * of the lockowner state released; so don't release any until all | |
4401 | * have been checked. */ | |
4402 | status = nfs_ok; | |
0fa822e4 | 4403 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4404 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4405 | lo_list); | |
0fa822e4 N |
4406 | /* unhash_stateowner deletes so_perclient only |
4407 | * for openowners. */ | |
fe0750e5 BF |
4408 | list_del(&lo->lo_list); |
4409 | release_lockowner(lo); | |
1da177e4 LT |
4410 | } |
4411 | out: | |
4412 | nfs4_unlock_state(); | |
4413 | return status; | |
4414 | } | |
4415 | ||
4416 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4417 | alloc_reclaim(void) |
1da177e4 | 4418 | { |
a55370a3 | 4419 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4420 | } |
4421 | ||
c7b9a459 | 4422 | int |
a1bcecd2 | 4423 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4424 | { |
4425 | unsigned int strhashval = clientstr_hashval(name); | |
4426 | struct nfs4_client *clp; | |
4427 | ||
e203d506 | 4428 | clp = find_confirmed_client_by_str(name, strhashval); |
393d8ed8 BF |
4429 | if (!clp) |
4430 | return 0; | |
a52d726b | 4431 | return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
c7b9a459 N |
4432 | } |
4433 | ||
1da177e4 LT |
4434 | /* |
4435 | * failure => all reset bets are off, nfserr_no_grace... | |
4436 | */ | |
190e4fbf N |
4437 | int |
4438 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4439 | { |
4440 | unsigned int strhashval; | |
4441 | struct nfs4_client_reclaim *crp = NULL; | |
4442 | ||
a55370a3 N |
4443 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4444 | crp = alloc_reclaim(); | |
1da177e4 LT |
4445 | if (!crp) |
4446 | return 0; | |
a55370a3 | 4447 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4448 | INIT_LIST_HEAD(&crp->cr_strhash); |
4449 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4450 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4451 | reclaim_str_hashtbl_size++; |
4452 | return 1; | |
4453 | } | |
4454 | ||
2a4317c5 | 4455 | void |
1da177e4 LT |
4456 | nfs4_release_reclaim(void) |
4457 | { | |
4458 | struct nfs4_client_reclaim *crp = NULL; | |
4459 | int i; | |
4460 | ||
1da177e4 LT |
4461 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4462 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4463 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4464 | struct nfs4_client_reclaim, cr_strhash); | |
4465 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4466 | kfree(crp); |
4467 | reclaim_str_hashtbl_size--; | |
4468 | } | |
4469 | } | |
4470 | BUG_ON(reclaim_str_hashtbl_size); | |
4471 | } | |
4472 | ||
4473 | /* | |
4474 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4475 | struct nfs4_client_reclaim * |
a52d726b | 4476 | nfsd4_find_reclaim_client(struct nfs4_client *clp) |
1da177e4 LT |
4477 | { |
4478 | unsigned int strhashval; | |
1da177e4 LT |
4479 | struct nfs4_client_reclaim *crp = NULL; |
4480 | ||
a55370a3 N |
4481 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4482 | clp->cl_name.len, clp->cl_name.data, | |
4483 | clp->cl_recdir); | |
1da177e4 LT |
4484 | |
4485 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4486 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4487 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4488 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4489 | return crp; |
4490 | } | |
4491 | } | |
4492 | return NULL; | |
4493 | } | |
4494 | ||
4495 | /* | |
4496 | * Called from OPEN. Look for clientid in reclaim list. | |
4497 | */ | |
b37ad28b | 4498 | __be32 |
1da177e4 LT |
4499 | nfs4_check_open_reclaim(clientid_t *clid) |
4500 | { | |
a52d726b JL |
4501 | struct nfs4_client *clp; |
4502 | ||
4503 | /* find clientid in conf_id_hashtbl */ | |
4504 | clp = find_confirmed_client(clid); | |
4505 | if (clp == NULL) | |
4506 | return nfserr_reclaim_bad; | |
4507 | ||
4508 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4509 | } |
4510 | ||
65178db4 BS |
4511 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4512 | ||
4513 | void nfsd_forget_clients(u64 num) | |
4514 | { | |
4515 | struct nfs4_client *clp, *next; | |
4516 | int count = 0; | |
4517 | ||
4518 | nfs4_lock_state(); | |
4519 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
2a4317c5 | 4520 | nfsd4_client_record_remove(clp); |
65178db4 BS |
4521 | expire_client(clp); |
4522 | if (++count == num) | |
4523 | break; | |
4524 | } | |
4525 | nfs4_unlock_state(); | |
4526 | ||
4527 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4528 | } | |
4529 | ||
4530 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4531 | { | |
4532 | release_lockowner(lockowner(sop)); | |
4533 | } | |
4534 | ||
4535 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4536 | { | |
4537 | release_openowner(openowner(sop)); | |
4538 | } | |
4539 | ||
353de31b | 4540 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4541 | void (*release_sop)(struct nfs4_stateowner *)) |
4542 | { | |
4543 | int i, count = 0; | |
4544 | struct nfs4_stateowner *sop, *next; | |
4545 | ||
16bfdaaf BF |
4546 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4547 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4548 | if (sop->so_is_open_owner != is_open_owner) | |
4549 | continue; | |
65178db4 BS |
4550 | release_sop(sop); |
4551 | if (++count == num) | |
4552 | return count; | |
4553 | } | |
4554 | } | |
4555 | return count; | |
4556 | } | |
4557 | ||
4558 | void nfsd_forget_locks(u64 num) | |
4559 | { | |
4560 | int count; | |
4561 | ||
4562 | nfs4_lock_state(); | |
16bfdaaf | 4563 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4564 | nfs4_unlock_state(); |
4565 | ||
4566 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4567 | } | |
4568 | ||
4569 | void nfsd_forget_openowners(u64 num) | |
4570 | { | |
4571 | int count; | |
4572 | ||
4573 | nfs4_lock_state(); | |
16bfdaaf | 4574 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4575 | nfs4_unlock_state(); |
4576 | ||
4577 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4578 | } | |
4579 | ||
a6d88f29 | 4580 | int nfsd_process_n_delegations(u64 num, struct list_head *list) |
65178db4 BS |
4581 | { |
4582 | int i, count = 0; | |
2d3475c0 BS |
4583 | struct nfs4_file *fp, *fnext; |
4584 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4585 | |
4586 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4587 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4588 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
a6d88f29 | 4589 | list_move(&dp->dl_recall_lru, list); |
65178db4 BS |
4590 | if (++count == num) |
4591 | return count; | |
4592 | } | |
4593 | } | |
4594 | } | |
2d3475c0 | 4595 | |
65178db4 BS |
4596 | return count; |
4597 | } | |
4598 | ||
4599 | void nfsd_forget_delegations(u64 num) | |
4600 | { | |
4601 | unsigned int count; | |
a6d88f29 SK |
4602 | LIST_HEAD(victims); |
4603 | struct nfs4_delegation *dp, *dnext; | |
4604 | ||
4605 | spin_lock(&recall_lock); | |
4606 | count = nfsd_process_n_delegations(num, &victims); | |
4607 | spin_unlock(&recall_lock); | |
65178db4 BS |
4608 | |
4609 | nfs4_lock_state(); | |
a6d88f29 SK |
4610 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) |
4611 | unhash_delegation(dp); | |
65178db4 BS |
4612 | nfs4_unlock_state(); |
4613 | ||
4614 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4615 | } | |
4616 | ||
4617 | void nfsd_recall_delegations(u64 num) | |
4618 | { | |
4619 | unsigned int count; | |
a6d88f29 SK |
4620 | LIST_HEAD(victims); |
4621 | struct nfs4_delegation *dp, *dnext; | |
65178db4 | 4622 | |
65178db4 | 4623 | spin_lock(&recall_lock); |
a6d88f29 SK |
4624 | count = nfsd_process_n_delegations(num, &victims); |
4625 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { | |
4626 | list_del(&dp->dl_recall_lru); | |
4627 | nfsd_break_one_deleg(dp); | |
4628 | } | |
65178db4 | 4629 | spin_unlock(&recall_lock); |
65178db4 BS |
4630 | |
4631 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4632 | } | |
4633 | ||
4634 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4635 | ||
ac4d8ff2 | 4636 | /* initialization to perform at module load time: */ |
1da177e4 | 4637 | |
72083396 | 4638 | void |
ac4d8ff2 | 4639 | nfs4_state_init(void) |
1da177e4 | 4640 | { |
72083396 | 4641 | int i; |
1da177e4 | 4642 | |
1da177e4 LT |
4643 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4644 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4645 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4646 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4647 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4648 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4649 | } |
5282fd72 ME |
4650 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4651 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4652 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4653 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4654 | } | |
16bfdaaf BF |
4655 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4656 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4657 | } |
009673b4 BF |
4658 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4659 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4660 | INIT_LIST_HEAD(&close_lru); |
4661 | INIT_LIST_HEAD(&client_lru); | |
4662 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4663 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4664 | } |
4665 | ||
c2f1a551 MS |
4666 | /* |
4667 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4668 | * client may quite reasonably hang on to a delegation as long as it has | |
4669 | * the inode cached. This becomes an obvious problem the first time a | |
4670 | * client's inode cache approaches the size of the server's total memory. | |
4671 | * | |
4672 | * For now we avoid this problem by imposing a hard limit on the number | |
4673 | * of delegations, which varies according to the server's memory size. | |
4674 | */ | |
4675 | static void | |
4676 | set_max_delegations(void) | |
4677 | { | |
4678 | /* | |
4679 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4680 | * estimates suggest that in the worst case (where every delegation | |
4681 | * is for a different inode), a delegation could take about 1.5K, | |
4682 | * giving a worst case usage of about 6% of memory. | |
4683 | */ | |
4684 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4685 | } | |
4686 | ||
ac4d8ff2 N |
4687 | /* initialization to perform when the nfsd service is started: */ |
4688 | ||
a6d6b781 JL |
4689 | int |
4690 | nfs4_state_start(void) | |
ac4d8ff2 | 4691 | { |
5e1533c7 SK |
4692 | struct net *net = &init_net; |
4693 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b5a1a81e BF |
4694 | int ret; |
4695 | ||
2a4317c5 JL |
4696 | /* |
4697 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4698 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4699 | * need to pass a net pointer into this function, take a reference | |
4700 | * to that instead and then do most of the rest of this on a per-net | |
4701 | * basis. | |
4702 | */ | |
5e1533c7 SK |
4703 | get_net(net); |
4704 | nfsd4_client_tracking_init(net); | |
1da177e4 | 4705 | boot_time = get_seconds(); |
5e1533c7 | 4706 | locks_start_grace(&nn->nfsd4_manager); |
33dcc481 | 4707 | grace_ended = false; |
9a8db97e | 4708 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4709 | nfsd4_grace); |
b5a1a81e | 4710 | ret = set_callback_cred(); |
a6d6b781 JL |
4711 | if (ret) { |
4712 | ret = -ENOMEM; | |
4713 | goto out_recovery; | |
4714 | } | |
58da282b | 4715 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4716 | if (laundry_wq == NULL) { |
4717 | ret = -ENOMEM; | |
4718 | goto out_recovery; | |
4719 | } | |
b5a1a81e BF |
4720 | ret = nfsd4_create_callback_queue(); |
4721 | if (ret) | |
4722 | goto out_free_laundry; | |
e46b498c | 4723 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4724 | set_max_delegations(); |
b5a1a81e BF |
4725 | return 0; |
4726 | out_free_laundry: | |
4727 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4728 | out_recovery: |
5e1533c7 SK |
4729 | nfsd4_client_tracking_exit(net); |
4730 | put_net(net); | |
b5a1a81e | 4731 | return ret; |
1da177e4 LT |
4732 | } |
4733 | ||
1da177e4 LT |
4734 | static void |
4735 | __nfs4_state_shutdown(void) | |
4736 | { | |
4737 | int i; | |
4738 | struct nfs4_client *clp = NULL; | |
4739 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4740 | struct list_head *pos, *next, reaplist; |
4741 | ||
1da177e4 LT |
4742 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4743 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4744 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4745 | expire_client(clp); | |
4746 | } | |
4747 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4748 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4749 | expire_client(clp); | |
4750 | } | |
4751 | } | |
4752 | INIT_LIST_HEAD(&reaplist); | |
4753 | spin_lock(&recall_lock); | |
4754 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4755 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4756 | list_move(&dp->dl_recall_lru, &reaplist); | |
4757 | } | |
4758 | spin_unlock(&recall_lock); | |
4759 | list_for_each_safe(pos, next, &reaplist) { | |
4760 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4761 | unhash_delegation(dp); |
4762 | } | |
4763 | ||
2a4317c5 JL |
4764 | nfsd4_client_tracking_exit(&init_net); |
4765 | put_net(&init_net); | |
1da177e4 LT |
4766 | } |
4767 | ||
4768 | void | |
4769 | nfs4_state_shutdown(void) | |
4770 | { | |
5e1533c7 SK |
4771 | struct net *net = &init_net; |
4772 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4773 | ||
afe2c511 | 4774 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4775 | destroy_workqueue(laundry_wq); |
5e1533c7 | 4776 | locks_end_grace(&nn->nfsd4_manager); |
1da177e4 | 4777 | nfs4_lock_state(); |
1da177e4 | 4778 | __nfs4_state_shutdown(); |
1da177e4 | 4779 | nfs4_unlock_state(); |
c3935e30 | 4780 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4781 | } |
8b70484c TM |
4782 | |
4783 | static void | |
4784 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4785 | { | |
37c593c5 TM |
4786 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4787 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4788 | } |
4789 | ||
4790 | static void | |
4791 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4792 | { | |
37c593c5 TM |
4793 | if (cstate->minorversion) { |
4794 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4795 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4796 | } | |
4797 | } | |
4798 | ||
4799 | void | |
4800 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4801 | { | |
4802 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4803 | } |
4804 | ||
62cd4a59 TM |
4805 | /* |
4806 | * functions to set current state id | |
4807 | */ | |
9428fe1a TM |
4808 | void |
4809 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4810 | { | |
4811 | put_stateid(cstate, &odp->od_stateid); | |
4812 | } | |
4813 | ||
8b70484c TM |
4814 | void |
4815 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4816 | { | |
4817 | put_stateid(cstate, &open->op_stateid); | |
4818 | } | |
4819 | ||
62cd4a59 TM |
4820 | void |
4821 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4822 | { | |
4823 | put_stateid(cstate, &close->cl_stateid); | |
4824 | } | |
4825 | ||
4826 | void | |
4827 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4828 | { | |
4829 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4830 | } | |
4831 | ||
4832 | /* | |
4833 | * functions to consume current state id | |
4834 | */ | |
1e97b519 | 4835 | |
9428fe1a TM |
4836 | void |
4837 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4838 | { | |
4839 | get_stateid(cstate, &odp->od_stateid); | |
4840 | } | |
4841 | ||
4842 | void | |
4843 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4844 | { | |
4845 | get_stateid(cstate, &drp->dr_stateid); | |
4846 | } | |
4847 | ||
1e97b519 TM |
4848 | void |
4849 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4850 | { | |
4851 | get_stateid(cstate, &fsp->fr_stateid); | |
4852 | } | |
4853 | ||
4854 | void | |
4855 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4856 | { | |
4857 | get_stateid(cstate, &setattr->sa_stateid); | |
4858 | } | |
4859 | ||
8b70484c TM |
4860 | void |
4861 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4862 | { | |
4863 | get_stateid(cstate, &close->cl_stateid); | |
4864 | } | |
4865 | ||
4866 | void | |
62cd4a59 | 4867 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4868 | { |
62cd4a59 | 4869 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4870 | } |
30813e27 TM |
4871 | |
4872 | void | |
4873 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4874 | { | |
4875 | get_stateid(cstate, &read->rd_stateid); | |
4876 | } | |
4877 | ||
4878 | void | |
4879 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
4880 | { | |
4881 | get_stateid(cstate, &write->wr_stateid); | |
4882 | } |