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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; |
f32f3c2d BF |
56 | |
57 | #define all_ones {{~0,~0},~0} | |
58 | static const stateid_t one_stateid = { | |
59 | .si_generation = ~0, | |
60 | .si_opaque = all_ones, | |
61 | }; | |
62 | static const stateid_t zero_stateid = { | |
63 | /* all fields zero */ | |
64 | }; | |
19ff0f28 TM |
65 | static const stateid_t currentstateid = { |
66 | .si_generation = 1, | |
67 | }; | |
f32f3c2d | 68 | |
ec6b5d7b | 69 | static u64 current_sessionid = 1; |
fd39ca9a | 70 | |
f32f3c2d BF |
71 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
72 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 73 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 74 | |
1da177e4 | 75 | /* forward declarations */ |
fe0750e5 | 76 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 77 | |
8b671b80 BF |
78 | /* Locking: */ |
79 | ||
80 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 81 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 82 | |
8b671b80 BF |
83 | /* |
84 | * Currently used for the del_recall_lru and file hash table. In an | |
85 | * effort to decrease the scope of the client_mutex, this spinlock may | |
86 | * eventually cover more: | |
87 | */ | |
88 | static DEFINE_SPINLOCK(recall_lock); | |
89 | ||
fe0750e5 BF |
90 | static struct kmem_cache *openowner_slab = NULL; |
91 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
92 | static struct kmem_cache *file_slab = NULL; |
93 | static struct kmem_cache *stateid_slab = NULL; | |
94 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 95 | |
1da177e4 LT |
96 | void |
97 | nfs4_lock_state(void) | |
98 | { | |
353ab6e9 | 99 | mutex_lock(&client_mutex); |
1da177e4 LT |
100 | } |
101 | ||
508dc6e1 BH |
102 | static void free_session(struct kref *); |
103 | ||
104 | /* Must be called under the client_lock */ | |
105 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
106 | { | |
107 | kref_put(&ses->se_ref, free_session); | |
108 | } | |
109 | ||
110 | static void nfsd4_get_session(struct nfsd4_session *ses) | |
111 | { | |
112 | kref_get(&ses->se_ref); | |
113 | } | |
114 | ||
1da177e4 LT |
115 | void |
116 | nfs4_unlock_state(void) | |
117 | { | |
353ab6e9 | 118 | mutex_unlock(&client_mutex); |
1da177e4 LT |
119 | } |
120 | ||
121 | static inline u32 | |
122 | opaque_hashval(const void *ptr, int nbytes) | |
123 | { | |
124 | unsigned char *cptr = (unsigned char *) ptr; | |
125 | ||
126 | u32 x = 0; | |
127 | while (nbytes--) { | |
128 | x *= 37; | |
129 | x += *cptr++; | |
130 | } | |
131 | return x; | |
132 | } | |
133 | ||
1da177e4 LT |
134 | static struct list_head del_recall_lru; |
135 | ||
32513b40 BF |
136 | static void nfsd4_free_file(struct nfs4_file *f) |
137 | { | |
138 | kmem_cache_free(file_slab, f); | |
139 | } | |
140 | ||
13cd2184 N |
141 | static inline void |
142 | put_nfs4_file(struct nfs4_file *fi) | |
143 | { | |
8b671b80 BF |
144 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
145 | list_del(&fi->fi_hash); | |
146 | spin_unlock(&recall_lock); | |
147 | iput(fi->fi_inode); | |
32513b40 | 148 | nfsd4_free_file(fi); |
8b671b80 | 149 | } |
13cd2184 N |
150 | } |
151 | ||
152 | static inline void | |
153 | get_nfs4_file(struct nfs4_file *fi) | |
154 | { | |
8b671b80 | 155 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
156 | } |
157 | ||
ef0f3390 | 158 | static int num_delegations; |
c2f1a551 | 159 | unsigned int max_delegations; |
ef0f3390 N |
160 | |
161 | /* | |
162 | * Open owner state (share locks) | |
163 | */ | |
164 | ||
16bfdaaf BF |
165 | /* hash tables for lock and open owners */ |
166 | #define OWNER_HASH_BITS 8 | |
167 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
168 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 169 | |
16bfdaaf | 170 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
171 | { |
172 | unsigned int ret; | |
173 | ||
174 | ret = opaque_hashval(ownername->data, ownername->len); | |
175 | ret += clientid; | |
16bfdaaf | 176 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 177 | } |
ef0f3390 | 178 | |
ef0f3390 N |
179 | /* hash table for nfs4_file */ |
180 | #define FILE_HASH_BITS 8 | |
181 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 182 | |
ddc04c41 BF |
183 | static unsigned int file_hashval(struct inode *ino) |
184 | { | |
185 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
186 | return hash_ptr(ino, FILE_HASH_BITS); | |
187 | } | |
188 | ||
ef0f3390 | 189 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 190 | |
998db52c | 191 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
192 | { |
193 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
194 | atomic_inc(&fp->fi_access[oflag]); | |
195 | } | |
196 | ||
998db52c BF |
197 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
198 | { | |
199 | if (oflag == O_RDWR) { | |
200 | __nfs4_file_get_access(fp, O_RDONLY); | |
201 | __nfs4_file_get_access(fp, O_WRONLY); | |
202 | } else | |
203 | __nfs4_file_get_access(fp, oflag); | |
204 | } | |
205 | ||
206 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
207 | { |
208 | if (fp->fi_fds[oflag]) { | |
209 | fput(fp->fi_fds[oflag]); | |
210 | fp->fi_fds[oflag] = NULL; | |
211 | } | |
212 | } | |
213 | ||
998db52c | 214 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
215 | { |
216 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 217 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
218 | /* |
219 | * It's also safe to get rid of the RDWR open *if* | |
220 | * we no longer have need of the other kind of access | |
221 | * or if we already have the other kind of open: | |
222 | */ | |
223 | if (fp->fi_fds[1-oflag] | |
224 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
225 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
226 | } |
227 | } | |
228 | ||
998db52c BF |
229 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
230 | { | |
231 | if (oflag == O_RDWR) { | |
232 | __nfs4_file_put_access(fp, O_RDONLY); | |
233 | __nfs4_file_put_access(fp, O_WRONLY); | |
234 | } else | |
235 | __nfs4_file_put_access(fp, oflag); | |
236 | } | |
237 | ||
6136d2b4 | 238 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 239 | { |
6136d2b4 | 240 | static int min_stateid = 0; |
38c2f4b1 | 241 | struct idr *stateids = &stid->sc_client->cl_stateids; |
6136d2b4 BF |
242 | int new_stid; |
243 | int error; | |
244 | ||
38c2f4b1 | 245 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
6136d2b4 | 246 | /* |
996e0938 BF |
247 | * Note: the necessary preallocation was done in |
248 | * nfs4_alloc_stateid(). The idr code caps the number of | |
249 | * preallocations that can exist at a time, but the state lock | |
250 | * prevents anyone from using ours before we get here: | |
6136d2b4 BF |
251 | */ |
252 | BUG_ON(error); | |
253 | /* | |
254 | * It shouldn't be a problem to reuse an opaque stateid value. | |
255 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
256 | * example, a stray write retransmission could be accepted by | |
257 | * the server when it should have been rejected. Therefore, | |
258 | * adopt a trick from the sctp code to attempt to maximize the | |
259 | * amount of time until an id is reused, by ensuring they always | |
260 | * "increase" (mod INT_MAX): | |
261 | */ | |
36d44c60 | 262 | |
6136d2b4 BF |
263 | min_stateid = new_stid+1; |
264 | if (min_stateid == INT_MAX) | |
265 | min_stateid = 0; | |
266 | return new_stid; | |
36d44c60 BF |
267 | } |
268 | ||
996e0938 | 269 | static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
2a74aba7 BF |
270 | { |
271 | stateid_t *s = &stid->sc_stateid; | |
6136d2b4 | 272 | int new_id; |
2a74aba7 BF |
273 | |
274 | stid->sc_type = type; | |
275 | stid->sc_client = cl; | |
276 | s->si_opaque.so_clid = cl->cl_clientid; | |
6136d2b4 | 277 | new_id = get_new_stid(stid); |
6136d2b4 | 278 | s->si_opaque.so_id = (u32)new_id; |
2a74aba7 BF |
279 | /* Will be incremented before return to client: */ |
280 | s->si_generation = 0; | |
996e0938 BF |
281 | } |
282 | ||
283 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) | |
284 | { | |
285 | struct idr *stateids = &cl->cl_stateids; | |
286 | ||
287 | if (!idr_pre_get(stateids, GFP_KERNEL)) | |
288 | return NULL; | |
289 | /* | |
290 | * Note: if we fail here (or any time between now and the time | |
291 | * we actually get the new idr), we won't need to undo the idr | |
292 | * preallocation, since the idr code caps the number of | |
293 | * preallocated entries. | |
294 | */ | |
295 | return kmem_cache_alloc(slab, GFP_KERNEL); | |
2a74aba7 BF |
296 | } |
297 | ||
4cdc951b BF |
298 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
299 | { | |
300 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
301 | } | |
302 | ||
1da177e4 | 303 | static struct nfs4_delegation * |
dcef0413 | 304 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
305 | { |
306 | struct nfs4_delegation *dp; | |
307 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
308 | |
309 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
310 | /* |
311 | * Major work on the lease subsystem (for example, to support | |
312 | * calbacks on stat) will be required before we can support | |
313 | * write delegations properly. | |
314 | */ | |
315 | if (type != NFS4_OPEN_DELEGATE_READ) | |
316 | return NULL; | |
47f9940c MS |
317 | if (fp->fi_had_conflict) |
318 | return NULL; | |
c2f1a551 | 319 | if (num_delegations > max_delegations) |
ef0f3390 | 320 | return NULL; |
996e0938 | 321 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 322 | if (dp == NULL) |
1da177e4 | 323 | return dp; |
996e0938 | 324 | init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
2a74aba7 BF |
325 | /* |
326 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
327 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
328 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
329 | */ |
330 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 331 | num_delegations++; |
ea1da636 N |
332 | INIT_LIST_HEAD(&dp->dl_perfile); |
333 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 334 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 335 | get_nfs4_file(fp); |
1da177e4 | 336 | dp->dl_file = fp; |
1da177e4 | 337 | dp->dl_type = type; |
6c02eaa1 | 338 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
339 | dp->dl_time = 0; |
340 | atomic_set(&dp->dl_count, 1); | |
57725155 | 341 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
342 | return dp; |
343 | } | |
344 | ||
345 | void | |
346 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
347 | { | |
348 | if (atomic_dec_and_test(&dp->dl_count)) { | |
349 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 350 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 351 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 352 | num_delegations--; |
1da177e4 LT |
353 | } |
354 | } | |
355 | ||
acfdf5c3 | 356 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 357 | { |
acfdf5c3 BF |
358 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
359 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
360 | fp->fi_lease = NULL; | |
4ee63624 | 361 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
362 | fp->fi_deleg_file = NULL; |
363 | } | |
1da177e4 LT |
364 | } |
365 | ||
6136d2b4 BF |
366 | static void unhash_stid(struct nfs4_stid *s) |
367 | { | |
38c2f4b1 BF |
368 | struct idr *stateids = &s->sc_client->cl_stateids; |
369 | ||
370 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
6136d2b4 BF |
371 | } |
372 | ||
1da177e4 LT |
373 | /* Called under the state lock. */ |
374 | static void | |
375 | unhash_delegation(struct nfs4_delegation *dp) | |
376 | { | |
6136d2b4 | 377 | unhash_stid(&dp->dl_stid); |
ea1da636 | 378 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 379 | spin_lock(&recall_lock); |
5d926e8c | 380 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
381 | list_del_init(&dp->dl_recall_lru); |
382 | spin_unlock(&recall_lock); | |
acfdf5c3 | 383 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
384 | nfs4_put_delegation(dp); |
385 | } | |
386 | ||
387 | /* | |
388 | * SETCLIENTID state | |
389 | */ | |
390 | ||
36acb66b | 391 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
392 | static DEFINE_SPINLOCK(client_lock); |
393 | ||
ddc04c41 BF |
394 | static unsigned int clientid_hashval(u32 id) |
395 | { | |
396 | return id & CLIENT_HASH_MASK; | |
397 | } | |
398 | ||
399 | static unsigned int clientstr_hashval(const char *name) | |
400 | { | |
401 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
402 | } | |
403 | ||
1da177e4 | 404 | /* |
1da177e4 LT |
405 | * client_lru holds client queue ordered by nfs4_client.cl_time |
406 | * for lease renewal. | |
407 | * | |
408 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
409 | * for last close replay. | |
ac55fdc4 JL |
410 | * |
411 | * All of the above fields are protected by the client_mutex. | |
1da177e4 | 412 | */ |
1da177e4 LT |
413 | static struct list_head client_lru; |
414 | static struct list_head close_lru; | |
415 | ||
f9d7562f BF |
416 | /* |
417 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
418 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
419 | * only what share bits are currently in force, but also what | |
420 | * combinations of share bits previous opens have used. This allows us | |
421 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
422 | * return an error if the client attempt to downgrade to a combination | |
423 | * of share bits not explicable by closing some of its previous opens. | |
424 | * | |
425 | * XXX: This enforcement is actually incomplete, since we don't keep | |
426 | * track of access/deny bit combinations; so, e.g., we allow: | |
427 | * | |
428 | * OPEN allow read, deny write | |
429 | * OPEN allow both, deny none | |
430 | * DOWNGRADE allow read, deny none | |
431 | * | |
432 | * which we should reject. | |
433 | */ | |
5ae037e5 JL |
434 | static unsigned int |
435 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 436 | int i; |
5ae037e5 | 437 | unsigned int access = 0; |
f9d7562f | 438 | |
f9d7562f BF |
439 | for (i = 1; i < 4; i++) { |
440 | if (test_bit(i, &bmap)) | |
5ae037e5 | 441 | access |= i; |
f9d7562f | 442 | } |
5ae037e5 | 443 | return access; |
f9d7562f BF |
444 | } |
445 | ||
3a328614 | 446 | static bool |
dcef0413 | 447 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
448 | unsigned int access, deny; |
449 | ||
5ae037e5 JL |
450 | access = bmap_to_share_mode(stp->st_access_bmap); |
451 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 452 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
453 | return false; |
454 | return true; | |
f9d7562f BF |
455 | } |
456 | ||
82c5ff1b JL |
457 | /* set share access for a given stateid */ |
458 | static inline void | |
459 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
460 | { | |
461 | __set_bit(access, &stp->st_access_bmap); | |
462 | } | |
463 | ||
464 | /* clear share access for a given stateid */ | |
465 | static inline void | |
466 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
467 | { | |
468 | __clear_bit(access, &stp->st_access_bmap); | |
469 | } | |
470 | ||
471 | /* test whether a given stateid has access */ | |
472 | static inline bool | |
473 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
474 | { | |
475 | return test_bit(access, &stp->st_access_bmap); | |
476 | } | |
477 | ||
ce0fc43c JL |
478 | /* set share deny for a given stateid */ |
479 | static inline void | |
480 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
481 | { | |
482 | __set_bit(access, &stp->st_deny_bmap); | |
483 | } | |
484 | ||
485 | /* clear share deny for a given stateid */ | |
486 | static inline void | |
487 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
488 | { | |
489 | __clear_bit(access, &stp->st_deny_bmap); | |
490 | } | |
491 | ||
492 | /* test whether a given stateid is denying specific access */ | |
493 | static inline bool | |
494 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
495 | { | |
496 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
497 | } |
498 | ||
499 | static int nfs4_access_to_omode(u32 access) | |
500 | { | |
8f34a430 | 501 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
502 | case NFS4_SHARE_ACCESS_READ: |
503 | return O_RDONLY; | |
504 | case NFS4_SHARE_ACCESS_WRITE: | |
505 | return O_WRONLY; | |
506 | case NFS4_SHARE_ACCESS_BOTH: | |
507 | return O_RDWR; | |
508 | } | |
509 | BUG(); | |
510 | } | |
511 | ||
82c5ff1b JL |
512 | /* release all access and file references for a given stateid */ |
513 | static void | |
514 | release_all_access(struct nfs4_ol_stateid *stp) | |
515 | { | |
516 | int i; | |
517 | ||
518 | for (i = 1; i < 4; i++) { | |
519 | if (test_access(i, stp)) | |
520 | nfs4_file_put_access(stp->st_file, | |
521 | nfs4_access_to_omode(i)); | |
522 | clear_access(i, stp); | |
523 | } | |
524 | } | |
525 | ||
dcef0413 | 526 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 527 | { |
529d7b2a BF |
528 | list_del(&stp->st_perfile); |
529 | list_del(&stp->st_perstateowner); | |
530 | } | |
531 | ||
dcef0413 | 532 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 533 | { |
82c5ff1b | 534 | release_all_access(stp); |
a96e5b90 | 535 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
536 | stp->st_file = NULL; |
537 | } | |
538 | ||
dcef0413 | 539 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 540 | { |
529d7b2a BF |
541 | kmem_cache_free(stateid_slab, stp); |
542 | } | |
543 | ||
dcef0413 | 544 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
545 | { |
546 | struct file *file; | |
547 | ||
548 | unhash_generic_stateid(stp); | |
6136d2b4 | 549 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
550 | file = find_any_file(stp->st_file); |
551 | if (file) | |
fe0750e5 | 552 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 553 | close_generic_stateid(stp); |
529d7b2a BF |
554 | free_generic_stateid(stp); |
555 | } | |
556 | ||
fe0750e5 | 557 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 558 | { |
dcef0413 | 559 | struct nfs4_ol_stateid *stp; |
529d7b2a | 560 | |
fe0750e5 BF |
561 | list_del(&lo->lo_owner.so_strhash); |
562 | list_del(&lo->lo_perstateid); | |
009673b4 | 563 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
564 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
565 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 566 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
567 | release_lock_stateid(stp); |
568 | } | |
569 | } | |
570 | ||
fe0750e5 | 571 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 572 | { |
fe0750e5 BF |
573 | unhash_lockowner(lo); |
574 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
575 | } |
576 | ||
577 | static void | |
dcef0413 | 578 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 579 | { |
fe0750e5 | 580 | struct nfs4_lockowner *lo; |
529d7b2a BF |
581 | |
582 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
583 | lo = list_entry(open_stp->st_lockowners.next, |
584 | struct nfs4_lockowner, lo_perstateid); | |
585 | release_lockowner(lo); | |
529d7b2a BF |
586 | } |
587 | } | |
588 | ||
38c387b5 | 589 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
590 | { |
591 | unhash_generic_stateid(stp); | |
592 | release_stateid_lockowners(stp); | |
38c387b5 BF |
593 | close_generic_stateid(stp); |
594 | } | |
595 | ||
596 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
597 | { | |
598 | unhash_open_stateid(stp); | |
6136d2b4 | 599 | unhash_stid(&stp->st_stid); |
2283963f BF |
600 | free_generic_stateid(stp); |
601 | } | |
602 | ||
fe0750e5 | 603 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 604 | { |
dcef0413 | 605 | struct nfs4_ol_stateid *stp; |
f1d110ca | 606 | |
fe0750e5 BF |
607 | list_del(&oo->oo_owner.so_strhash); |
608 | list_del(&oo->oo_perclient); | |
609 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
610 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 611 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 612 | release_open_stateid(stp); |
f1d110ca BF |
613 | } |
614 | } | |
615 | ||
f7a4d872 BF |
616 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
617 | { | |
618 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
619 | ||
620 | if (s) { | |
6136d2b4 | 621 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
622 | free_generic_stateid(s); |
623 | oo->oo_last_closed_stid = NULL; | |
624 | } | |
625 | } | |
626 | ||
fe0750e5 | 627 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 628 | { |
fe0750e5 BF |
629 | unhash_openowner(oo); |
630 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 631 | release_last_closed_stateid(oo); |
fe0750e5 | 632 | nfs4_free_openowner(oo); |
f1d110ca BF |
633 | } |
634 | ||
5282fd72 ME |
635 | static inline int |
636 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
637 | { | |
638 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
639 | ||
640 | return sid->sequence % SESSION_HASH_SIZE; | |
641 | } | |
642 | ||
8f199b82 | 643 | #ifdef NFSD_DEBUG |
5282fd72 ME |
644 | static inline void |
645 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
646 | { | |
647 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
648 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
649 | } | |
8f199b82 TM |
650 | #else |
651 | static inline void | |
652 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
653 | { | |
654 | } | |
655 | #endif | |
656 | ||
5282fd72 | 657 | |
ec6b5d7b AA |
658 | static void |
659 | gen_sessionid(struct nfsd4_session *ses) | |
660 | { | |
661 | struct nfs4_client *clp = ses->se_client; | |
662 | struct nfsd4_sessionid *sid; | |
663 | ||
664 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
665 | sid->clientid = clp->cl_clientid; | |
666 | sid->sequence = current_sessionid++; | |
667 | sid->reserved = 0; | |
668 | } | |
669 | ||
670 | /* | |
a649637c AA |
671 | * The protocol defines ca_maxresponssize_cached to include the size of |
672 | * the rpc header, but all we need to cache is the data starting after | |
673 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
674 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
675 | * value that is the number of bytes in our cache plus a few additional | |
676 | * bytes. In order to stay on the safe side, and not promise more than | |
677 | * we can cache, those additional bytes must be the minimum possible: 24 | |
678 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
679 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
680 | * for the SEQUENCE op response: | |
681 | */ | |
682 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
683 | ||
557ce264 AA |
684 | static void |
685 | free_session_slots(struct nfsd4_session *ses) | |
686 | { | |
687 | int i; | |
688 | ||
689 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
690 | kfree(ses->se_slots[i]); | |
691 | } | |
692 | ||
a649637c | 693 | /* |
efe0cb6d BF |
694 | * We don't actually need to cache the rpc and session headers, so we |
695 | * can allocate a little less for each slot: | |
696 | */ | |
697 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
698 | { | |
699 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
700 | } | |
701 | ||
5b6feee9 | 702 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 703 | { |
5b6feee9 BF |
704 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
705 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 706 | |
5b6feee9 BF |
707 | return size; |
708 | } | |
ec6b5d7b | 709 | |
5b6feee9 BF |
710 | /* |
711 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 712 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 713 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 714 | */ |
5b6feee9 | 715 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 716 | { |
5b6feee9 | 717 | int avail; |
ec6b5d7b | 718 | |
5b6feee9 | 719 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 720 | |
5b6feee9 BF |
721 | spin_lock(&nfsd_drc_lock); |
722 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
723 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
724 | num = min_t(int, num, avail / slotsize); | |
725 | nfsd_drc_mem_used += num * slotsize; | |
726 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 727 | |
5b6feee9 BF |
728 | return num; |
729 | } | |
ec6b5d7b | 730 | |
5b6feee9 BF |
731 | static void nfsd4_put_drc_mem(int slotsize, int num) |
732 | { | |
4bd9b0f4 | 733 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 734 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 735 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 736 | } |
ec6b5d7b | 737 | |
a827bcb2 | 738 | static struct nfsd4_session *__alloc_session(int slotsize, int numslots) |
5b6feee9 BF |
739 | { |
740 | struct nfsd4_session *new; | |
741 | int mem, i; | |
a649637c | 742 | |
5b6feee9 BF |
743 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
744 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
745 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 746 | |
5b6feee9 BF |
747 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
748 | if (!new) | |
749 | return NULL; | |
557ce264 | 750 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
751 | for (i = 0; i < numslots; i++) { |
752 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
753 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
754 | if (!new->se_slots[i]) | |
557ce264 | 755 | goto out_free; |
557ce264 | 756 | } |
5b6feee9 BF |
757 | return new; |
758 | out_free: | |
759 | while (i--) | |
760 | kfree(new->se_slots[i]); | |
761 | kfree(new); | |
762 | return NULL; | |
ec6b5d7b AA |
763 | } |
764 | ||
5b6feee9 | 765 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 766 | { |
5b6feee9 | 767 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 768 | |
5b6feee9 | 769 | new->maxreqs = numslots; |
d2b21743 MJ |
770 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
771 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
772 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
773 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
774 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
775 | } | |
ec6b5d7b | 776 | |
19cf5c02 BF |
777 | static void free_conn(struct nfsd4_conn *c) |
778 | { | |
779 | svc_xprt_put(c->cn_xprt); | |
780 | kfree(c); | |
781 | } | |
ec6b5d7b | 782 | |
19cf5c02 BF |
783 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
784 | { | |
785 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
786 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 787 | |
19cf5c02 BF |
788 | spin_lock(&clp->cl_lock); |
789 | if (!list_empty(&c->cn_persession)) { | |
790 | list_del(&c->cn_persession); | |
791 | free_conn(c); | |
792 | } | |
793 | spin_unlock(&clp->cl_lock); | |
eea49806 | 794 | nfsd4_probe_callback(clp); |
19cf5c02 | 795 | } |
ec6b5d7b | 796 | |
d29c374c | 797 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 798 | { |
c7662518 | 799 | struct nfsd4_conn *conn; |
ec6b5d7b | 800 | |
c7662518 BF |
801 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
802 | if (!conn) | |
db90681d | 803 | return NULL; |
c7662518 BF |
804 | svc_xprt_get(rqstp->rq_xprt); |
805 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 806 | conn->cn_flags = flags; |
db90681d BF |
807 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
808 | return conn; | |
809 | } | |
a649637c | 810 | |
328ead28 BF |
811 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
812 | { | |
813 | conn->cn_session = ses; | |
814 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
815 | } |
816 | ||
db90681d | 817 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 818 | { |
db90681d | 819 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 820 | |
c7662518 | 821 | spin_lock(&clp->cl_lock); |
328ead28 | 822 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 823 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
824 | } |
825 | ||
21b75b01 | 826 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 827 | { |
19cf5c02 | 828 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 829 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
830 | } |
831 | ||
e1ff371f | 832 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 833 | { |
21b75b01 | 834 | int ret; |
ec6b5d7b | 835 | |
db90681d | 836 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
837 | ret = nfsd4_register_conn(conn); |
838 | if (ret) | |
839 | /* oops; xprt is already down: */ | |
840 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 841 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
842 | /* callback channel may be back up */ |
843 | nfsd4_probe_callback(ses->se_client); | |
844 | } | |
c7662518 | 845 | } |
ec6b5d7b | 846 | |
e1ff371f | 847 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
848 | { |
849 | u32 dir = NFS4_CDFC4_FORE; | |
850 | ||
e1ff371f | 851 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 852 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 853 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
854 | } |
855 | ||
856 | /* must be called under client_lock */ | |
19cf5c02 | 857 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 858 | { |
19cf5c02 BF |
859 | struct nfs4_client *clp = s->se_client; |
860 | struct nfsd4_conn *c; | |
ec6b5d7b | 861 | |
19cf5c02 BF |
862 | spin_lock(&clp->cl_lock); |
863 | while (!list_empty(&s->se_conns)) { | |
864 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
865 | list_del_init(&c->cn_persession); | |
866 | spin_unlock(&clp->cl_lock); | |
557ce264 | 867 | |
19cf5c02 BF |
868 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
869 | free_conn(c); | |
ec6b5d7b | 870 | |
19cf5c02 BF |
871 | spin_lock(&clp->cl_lock); |
872 | } | |
873 | spin_unlock(&clp->cl_lock); | |
c7662518 | 874 | } |
ec6b5d7b | 875 | |
1377b69e BF |
876 | static void __free_session(struct nfsd4_session *ses) |
877 | { | |
878 | nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); | |
879 | free_session_slots(ses); | |
880 | kfree(ses); | |
881 | } | |
882 | ||
508dc6e1 | 883 | static void free_session(struct kref *kref) |
c7662518 BF |
884 | { |
885 | struct nfsd4_session *ses; | |
c7662518 | 886 | |
bc2df47a | 887 | lockdep_assert_held(&client_lock); |
c7662518 | 888 | ses = container_of(kref, struct nfsd4_session, se_ref); |
19cf5c02 | 889 | nfsd4_del_conns(ses); |
1377b69e | 890 | __free_session(ses); |
c7662518 BF |
891 | } |
892 | ||
508dc6e1 BH |
893 | void nfsd4_put_session(struct nfsd4_session *ses) |
894 | { | |
895 | spin_lock(&client_lock); | |
896 | nfsd4_put_session_locked(ses); | |
897 | spin_unlock(&client_lock); | |
898 | } | |
899 | ||
a827bcb2 | 900 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan) |
5b6feee9 BF |
901 | { |
902 | struct nfsd4_session *new; | |
5b6feee9 | 903 | int numslots, slotsize; |
5b6feee9 BF |
904 | /* |
905 | * Note decreasing slot size below client's request may | |
906 | * make it difficult for client to function correctly, whereas | |
907 | * decreasing the number of slots will (just?) affect | |
908 | * performance. When short on memory we therefore prefer to | |
909 | * decrease number of slots instead of their size. | |
910 | */ | |
911 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
912 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
913 | if (numslots < 1) |
914 | return NULL; | |
5b6feee9 | 915 | |
a827bcb2 | 916 | new = __alloc_session(slotsize, numslots); |
5b6feee9 BF |
917 | if (!new) { |
918 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 919 | return NULL; |
557ce264 | 920 | } |
5b6feee9 | 921 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
a827bcb2 BF |
922 | return new; |
923 | } | |
557ce264 | 924 | |
135ae827 | 925 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 926 | { |
a827bcb2 | 927 | int idx; |
1872de0e | 928 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 929 | |
ec6b5d7b AA |
930 | new->se_client = clp; |
931 | gen_sessionid(new); | |
ec6b5d7b | 932 | |
c7662518 BF |
933 | INIT_LIST_HEAD(&new->se_conns); |
934 | ||
ac7c46f2 | 935 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 936 | new->se_flags = cses->flags; |
8b5ce5cd | 937 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 938 | new->se_cb_sec = cses->cb_sec; |
ec6b5d7b | 939 | kref_init(&new->se_ref); |
5b6feee9 | 940 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 941 | spin_lock(&client_lock); |
1872de0e | 942 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 943 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 944 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 945 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 946 | spin_unlock(&client_lock); |
ec6b5d7b | 947 | |
dcbeaa68 | 948 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 949 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
950 | /* |
951 | * This is a little silly; with sessions there's no real | |
952 | * use for the callback address. Use the peer address | |
953 | * as a reasonable default for now, but consider fixing | |
954 | * the rpc client not to require an address in the | |
955 | * future: | |
956 | */ | |
edd76786 BF |
957 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
958 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 959 | } |
ec6b5d7b AA |
960 | } |
961 | ||
9089f1b4 | 962 | /* caller must hold client_lock */ |
5282fd72 | 963 | static struct nfsd4_session * |
1872de0e | 964 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
965 | { |
966 | struct nfsd4_session *elem; | |
967 | int idx; | |
1872de0e | 968 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
969 | |
970 | dump_sessionid(__func__, sessionid); | |
971 | idx = hash_sessionid(sessionid); | |
5282fd72 | 972 | /* Search in the appropriate list */ |
1872de0e | 973 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
974 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
975 | NFS4_MAX_SESSIONID_LEN)) { | |
976 | return elem; | |
977 | } | |
978 | } | |
979 | ||
980 | dprintk("%s: session not found\n", __func__); | |
981 | return NULL; | |
982 | } | |
983 | ||
9089f1b4 | 984 | /* caller must hold client_lock */ |
7116ed6b | 985 | static void |
5282fd72 | 986 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
987 | { |
988 | list_del(&ses->se_hash); | |
4c649378 | 989 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 990 | list_del(&ses->se_perclnt); |
4c649378 | 991 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
992 | } |
993 | ||
36acb66b | 994 | /* must be called under the client_lock */ |
1da177e4 | 995 | static inline void |
36acb66b | 996 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 997 | { |
07cd4909 | 998 | if (is_client_expired(clp)) { |
7447758b BF |
999 | WARN_ON(1); |
1000 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
07cd4909 BH |
1001 | __func__, |
1002 | clp->cl_clientid.cl_boot, | |
1003 | clp->cl_clientid.cl_id); | |
1004 | return; | |
1005 | } | |
1006 | ||
1da177e4 LT |
1007 | dprintk("renewing client (clientid %08x/%08x)\n", |
1008 | clp->cl_clientid.cl_boot, | |
1009 | clp->cl_clientid.cl_id); | |
1010 | list_move_tail(&clp->cl_lru, &client_lru); | |
1011 | clp->cl_time = get_seconds(); | |
1012 | } | |
1013 | ||
36acb66b BH |
1014 | static inline void |
1015 | renew_client(struct nfs4_client *clp) | |
1016 | { | |
1017 | spin_lock(&client_lock); | |
1018 | renew_client_locked(clp); | |
1019 | spin_unlock(&client_lock); | |
1020 | } | |
1021 | ||
1da177e4 LT |
1022 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1023 | static int | |
2c142baa | 1024 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1025 | { |
2c142baa | 1026 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1027 | return 0; |
60adfc50 | 1028 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1029 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1030 | return 1; |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * XXX Should we use a slab cache ? | |
1035 | * This type of memory management is somewhat inefficient, but we use it | |
1036 | * anyway since SETCLIENTID is not a common operation. | |
1037 | */ | |
35bba9a3 | 1038 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1039 | { |
1040 | struct nfs4_client *clp; | |
1041 | ||
35bba9a3 BF |
1042 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1043 | if (clp == NULL) | |
1044 | return NULL; | |
67114fe6 | 1045 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1046 | if (clp->cl_name.data == NULL) { |
1047 | kfree(clp); | |
1048 | return NULL; | |
1da177e4 | 1049 | } |
35bba9a3 | 1050 | clp->cl_name.len = name.len; |
1da177e4 LT |
1051 | return clp; |
1052 | } | |
1053 | ||
1054 | static inline void | |
1055 | free_client(struct nfs4_client *clp) | |
1056 | { | |
bc2df47a | 1057 | lockdep_assert_held(&client_lock); |
792c95dd BF |
1058 | while (!list_empty(&clp->cl_sessions)) { |
1059 | struct nfsd4_session *ses; | |
1060 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1061 | se_perclnt); | |
1062 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1063 | nfsd4_put_session_locked(ses); |
792c95dd | 1064 | } |
03a4e1f6 | 1065 | free_svc_cred(&clp->cl_cred); |
1da177e4 LT |
1066 | kfree(clp->cl_name.data); |
1067 | kfree(clp); | |
1068 | } | |
1069 | ||
d7682988 BH |
1070 | void |
1071 | release_session_client(struct nfsd4_session *session) | |
1072 | { | |
1073 | struct nfs4_client *clp = session->se_client; | |
1074 | ||
1075 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1076 | return; | |
1077 | if (is_client_expired(clp)) { | |
1078 | free_client(clp); | |
1079 | session->se_client = NULL; | |
1080 | } else | |
1081 | renew_client_locked(clp); | |
1082 | spin_unlock(&client_lock); | |
d7682988 BH |
1083 | } |
1084 | ||
84d38ac9 BH |
1085 | /* must be called under the client_lock */ |
1086 | static inline void | |
1087 | unhash_client_locked(struct nfs4_client *clp) | |
1088 | { | |
792c95dd BF |
1089 | struct nfsd4_session *ses; |
1090 | ||
07cd4909 | 1091 | mark_client_expired(clp); |
84d38ac9 | 1092 | list_del(&clp->cl_lru); |
4c649378 | 1093 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1094 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1095 | list_del_init(&ses->se_hash); | |
4c649378 | 1096 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1097 | } |
1098 | ||
1da177e4 | 1099 | static void |
0d22f68f | 1100 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1101 | { |
fe0750e5 | 1102 | struct nfs4_openowner *oo; |
1da177e4 | 1103 | struct nfs4_delegation *dp; |
1da177e4 | 1104 | struct list_head reaplist; |
382a62e7 | 1105 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1106 | |
1da177e4 LT |
1107 | INIT_LIST_HEAD(&reaplist); |
1108 | spin_lock(&recall_lock); | |
ea1da636 N |
1109 | while (!list_empty(&clp->cl_delegations)) { |
1110 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1111 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1112 | list_move(&dp->dl_recall_lru, &reaplist); |
1113 | } | |
1114 | spin_unlock(&recall_lock); | |
1115 | while (!list_empty(&reaplist)) { | |
1116 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1117 | unhash_delegation(dp); |
1118 | } | |
ea1da636 | 1119 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1120 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1121 | release_openowner(oo); | |
1da177e4 | 1122 | } |
6ff8da08 | 1123 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1124 | if (clp->cl_cb_conn.cb_xprt) |
1125 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1126 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1127 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1128 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1129 | else |
a99454aa | 1130 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
be1fdf6c | 1131 | spin_lock(&client_lock); |
84d38ac9 | 1132 | unhash_client_locked(clp); |
46583e25 BH |
1133 | if (atomic_read(&clp->cl_refcount) == 0) |
1134 | free_client(clp); | |
be1fdf6c | 1135 | spin_unlock(&client_lock); |
1da177e4 LT |
1136 | } |
1137 | ||
0d22f68f BF |
1138 | static void expire_client(struct nfs4_client *clp) |
1139 | { | |
1140 | nfsd4_client_record_remove(clp); | |
1141 | destroy_client(clp); | |
1142 | } | |
1143 | ||
35bba9a3 BF |
1144 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1145 | { | |
1146 | memcpy(target->cl_verifier.data, source->data, | |
1147 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1148 | } |
1149 | ||
35bba9a3 BF |
1150 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1151 | { | |
1da177e4 LT |
1152 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1153 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1154 | } | |
1155 | ||
03a4e1f6 | 1156 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1157 | { |
03a4e1f6 BF |
1158 | if (source->cr_principal) { |
1159 | target->cr_principal = | |
1160 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1161 | if (target->cr_principal == NULL) | |
1162 | return -ENOMEM; | |
1163 | } else | |
1164 | target->cr_principal = NULL; | |
d5497fc6 | 1165 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1166 | target->cr_uid = source->cr_uid; |
1167 | target->cr_gid = source->cr_gid; | |
1168 | target->cr_group_info = source->cr_group_info; | |
1169 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1170 | return 0; |
1da177e4 LT |
1171 | } |
1172 | ||
ac55fdc4 JL |
1173 | static long long |
1174 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1175 | { | |
1176 | long long res; | |
1177 | ||
1178 | res = o1->len - o2->len; | |
1179 | if (res) | |
1180 | return res; | |
1181 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1182 | } | |
1183 | ||
35bba9a3 | 1184 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1185 | { |
a55370a3 | 1186 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1187 | } |
1188 | ||
1189 | static int | |
599e0a22 BF |
1190 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1191 | { | |
1192 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1193 | } |
1194 | ||
1195 | static int | |
599e0a22 BF |
1196 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1197 | { | |
1198 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1199 | } |
1200 | ||
8fbba96e BF |
1201 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1202 | { | |
1203 | int i; | |
1204 | ||
1205 | if (g1->ngroups != g2->ngroups) | |
1206 | return false; | |
1207 | for (i=0; i<g1->ngroups; i++) | |
1208 | if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) | |
1209 | return false; | |
1210 | return true; | |
1211 | } | |
1212 | ||
68eb3508 BF |
1213 | /* |
1214 | * RFC 3530 language requires clid_inuse be returned when the | |
1215 | * "principal" associated with a requests differs from that previously | |
1216 | * used. We use uid, gid's, and gss principal string as our best | |
1217 | * approximation. We also don't want to allow non-gss use of a client | |
1218 | * established using gss: in theory cr_principal should catch that | |
1219 | * change, but in practice cr_principal can be null even in the gss case | |
1220 | * since gssd doesn't always pass down a principal string. | |
1221 | */ | |
1222 | static bool is_gss_cred(struct svc_cred *cr) | |
1223 | { | |
1224 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1225 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1226 | } | |
1227 | ||
1228 | ||
5559b50a | 1229 | static bool |
599e0a22 BF |
1230 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1231 | { | |
68eb3508 | 1232 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
d5497fc6 | 1233 | || (cr1->cr_uid != cr2->cr_uid) |
8fbba96e BF |
1234 | || (cr1->cr_gid != cr2->cr_gid) |
1235 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) | |
1236 | return false; | |
1237 | if (cr1->cr_principal == cr2->cr_principal) | |
1238 | return true; | |
1239 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1240 | return false; | |
5559b50a | 1241 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1242 | } |
1243 | ||
c212cecf | 1244 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1245 | { |
1246 | static u32 current_clientid = 1; | |
1247 | ||
2c142baa | 1248 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1249 | clp->cl_clientid.cl_id = current_clientid++; |
1250 | } | |
1251 | ||
deda2faa BF |
1252 | static void gen_confirm(struct nfs4_client *clp) |
1253 | { | |
ab4684d1 | 1254 | __be32 verf[2]; |
deda2faa | 1255 | static u32 i; |
1da177e4 | 1256 | |
ab4684d1 CL |
1257 | verf[0] = (__be32)get_seconds(); |
1258 | verf[1] = (__be32)i++; | |
1259 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1260 | } |
1261 | ||
38c2f4b1 | 1262 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1263 | { |
38c2f4b1 | 1264 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1265 | } |
1266 | ||
38c2f4b1 | 1267 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1268 | { |
1269 | struct nfs4_stid *s; | |
4d71ab87 | 1270 | |
38c2f4b1 | 1271 | s = find_stateid(cl, t); |
4d71ab87 BF |
1272 | if (!s) |
1273 | return NULL; | |
f459e453 | 1274 | if (typemask & s->sc_type) |
4581d140 | 1275 | return s; |
4581d140 BF |
1276 | return NULL; |
1277 | } | |
1278 | ||
2216d449 | 1279 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1280 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1281 | { | |
1282 | struct nfs4_client *clp; | |
1283 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1284 | int ret; |
c212cecf | 1285 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
1286 | |
1287 | clp = alloc_client(name); | |
1288 | if (clp == NULL) | |
1289 | return NULL; | |
1290 | ||
792c95dd | 1291 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1292 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1293 | if (ret) { | |
1294 | spin_lock(&client_lock); | |
1295 | free_client(clp); | |
1296 | spin_unlock(&client_lock); | |
1297 | return NULL; | |
b09333c4 | 1298 | } |
38c2f4b1 | 1299 | idr_init(&clp->cl_stateids); |
46583e25 | 1300 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1301 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1302 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1303 | INIT_LIST_HEAD(&clp->cl_openowners); |
1304 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1305 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1306 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1307 | spin_lock_init(&clp->cl_lock); |
57725155 | 1308 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1309 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1310 | clear_bit(0, &clp->cl_cb_slot_busy); |
1311 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1312 | copy_verf(clp, verf); | |
1313 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1314 | gen_confirm(clp); |
edd76786 | 1315 | clp->cl_cb_session = NULL; |
c212cecf | 1316 | clp->net = net; |
b09333c4 RL |
1317 | return clp; |
1318 | } | |
1319 | ||
fd39ca9a | 1320 | static void |
ac55fdc4 JL |
1321 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1322 | { | |
1323 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1324 | struct nfs4_client *clp; | |
1325 | ||
1326 | while (*new) { | |
1327 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1328 | parent = *new; | |
1329 | ||
1330 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1331 | new = &((*new)->rb_left); | |
1332 | else | |
1333 | new = &((*new)->rb_right); | |
1334 | } | |
1335 | ||
1336 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1337 | rb_insert_color(&new_clp->cl_namenode, root); | |
1338 | } | |
1339 | ||
1340 | static struct nfs4_client * | |
1341 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1342 | { | |
1343 | long long cmp; | |
1344 | struct rb_node *node = root->rb_node; | |
1345 | struct nfs4_client *clp; | |
1346 | ||
1347 | while (node) { | |
1348 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1349 | cmp = compare_blob(&clp->cl_name, name); | |
1350 | if (cmp > 0) | |
1351 | node = node->rb_left; | |
1352 | else if (cmp < 0) | |
1353 | node = node->rb_right; | |
1354 | else | |
1355 | return clp; | |
1356 | } | |
1357 | return NULL; | |
1358 | } | |
1359 | ||
1360 | static void | |
1361 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1362 | { |
1363 | unsigned int idhashval; | |
0a7ec377 | 1364 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1365 | |
ac55fdc4 | 1366 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1367 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1368 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1369 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1370 | renew_client(clp); |
1da177e4 LT |
1371 | } |
1372 | ||
fd39ca9a | 1373 | static void |
1da177e4 LT |
1374 | move_to_confirmed(struct nfs4_client *clp) |
1375 | { | |
1376 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1377 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1378 | |
1379 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1380 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1381 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1382 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1383 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1384 | renew_client(clp); |
1385 | } | |
1386 | ||
1387 | static struct nfs4_client * | |
8daae4dc | 1388 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 LT |
1389 | { |
1390 | struct nfs4_client *clp; | |
1391 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1392 | ||
8daae4dc | 1393 | list_for_each_entry(clp, &nn->conf_id_hashtbl[idhashval], cl_idhash) { |
a50d2ad1 | 1394 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1395 | if ((bool)clp->cl_minorversion != sessions) |
1396 | return NULL; | |
a50d2ad1 | 1397 | renew_client(clp); |
1da177e4 | 1398 | return clp; |
a50d2ad1 | 1399 | } |
1da177e4 LT |
1400 | } |
1401 | return NULL; | |
1402 | } | |
1403 | ||
1404 | static struct nfs4_client * | |
0a7ec377 | 1405 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 LT |
1406 | { |
1407 | struct nfs4_client *clp; | |
1408 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1409 | ||
0a7ec377 | 1410 | list_for_each_entry(clp, &nn->unconf_id_hashtbl[idhashval], cl_idhash) { |
d15c077e BF |
1411 | if (same_clid(&clp->cl_clientid, clid)) { |
1412 | if ((bool)clp->cl_minorversion != sessions) | |
1413 | return NULL; | |
1da177e4 | 1414 | return clp; |
d15c077e | 1415 | } |
1da177e4 LT |
1416 | } |
1417 | return NULL; | |
1418 | } | |
1419 | ||
6e5f15c9 | 1420 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1421 | { |
6e5f15c9 | 1422 | return clp->cl_exchange_flags != 0; |
e203d506 | 1423 | } |
a1bcecd2 | 1424 | |
28ce6054 | 1425 | static struct nfs4_client * |
382a62e7 | 1426 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1427 | { |
382a62e7 | 1428 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1429 | } |
1430 | ||
1431 | static struct nfs4_client * | |
a99454aa | 1432 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1433 | { |
a99454aa | 1434 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1435 | } |
1436 | ||
fd39ca9a | 1437 | static void |
6f3d772f | 1438 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1439 | { |
07263f1e | 1440 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1441 | struct sockaddr *sa = svc_addr(rqstp); |
1442 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1443 | unsigned short expected_family; |
1444 | ||
1445 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1446 | if (se->se_callback_netid_len == 3 && | |
1447 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1448 | expected_family = AF_INET; | |
1449 | else if (se->se_callback_netid_len == 4 && | |
1450 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1451 | expected_family = AF_INET6; | |
1452 | else | |
1da177e4 LT |
1453 | goto out_err; |
1454 | ||
c212cecf | 1455 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1456 | se->se_callback_addr_len, |
07263f1e BF |
1457 | (struct sockaddr *)&conn->cb_addr, |
1458 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1459 | |
07263f1e | 1460 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1461 | goto out_err; |
aa9a4ec7 | 1462 | |
07263f1e BF |
1463 | if (conn->cb_addr.ss_family == AF_INET6) |
1464 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1465 | |
07263f1e BF |
1466 | conn->cb_prog = se->se_callback_prog; |
1467 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1468 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1469 | return; |
1470 | out_err: | |
07263f1e BF |
1471 | conn->cb_addr.ss_family = AF_UNSPEC; |
1472 | conn->cb_addrlen = 0; | |
849823c5 | 1473 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1474 | "will not receive delegations\n", |
1475 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1476 | ||
1da177e4 LT |
1477 | return; |
1478 | } | |
1479 | ||
074fe897 | 1480 | /* |
557ce264 | 1481 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1482 | */ |
074fe897 AA |
1483 | void |
1484 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1485 | { |
557ce264 AA |
1486 | struct nfsd4_slot *slot = resp->cstate.slot; |
1487 | unsigned int base; | |
074fe897 | 1488 | |
557ce264 | 1489 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1490 | |
557ce264 AA |
1491 | slot->sl_opcnt = resp->opcnt; |
1492 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1493 | |
bf5c43c8 | 1494 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1495 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1496 | slot->sl_datalen = 0; |
bf864a31 | 1497 | return; |
074fe897 | 1498 | } |
557ce264 AA |
1499 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1500 | base = (char *)resp->cstate.datap - | |
1501 | (char *)resp->xbuf->head[0].iov_base; | |
1502 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1503 | slot->sl_datalen)) | |
1504 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1505 | return; | |
074fe897 AA |
1506 | } |
1507 | ||
1508 | /* | |
abfabf8c AA |
1509 | * Encode the replay sequence operation from the slot values. |
1510 | * If cachethis is FALSE encode the uncached rep error on the next | |
1511 | * operation which sets resp->p and increments resp->opcnt for | |
1512 | * nfs4svc_encode_compoundres. | |
074fe897 | 1513 | * |
074fe897 | 1514 | */ |
abfabf8c AA |
1515 | static __be32 |
1516 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1517 | struct nfsd4_compoundres *resp) | |
074fe897 | 1518 | { |
abfabf8c AA |
1519 | struct nfsd4_op *op; |
1520 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1521 | |
abfabf8c AA |
1522 | /* Encode the replayed sequence operation */ |
1523 | op = &args->ops[resp->opcnt - 1]; | |
1524 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1525 | |
abfabf8c | 1526 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1527 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1528 | op = &args->ops[resp->opcnt++]; |
1529 | op->status = nfserr_retry_uncached_rep; | |
1530 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1531 | } |
abfabf8c | 1532 | return op->status; |
074fe897 AA |
1533 | } |
1534 | ||
1535 | /* | |
557ce264 AA |
1536 | * The sequence operation is not cached because we can use the slot and |
1537 | * session values. | |
074fe897 AA |
1538 | */ |
1539 | __be32 | |
bf864a31 AA |
1540 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1541 | struct nfsd4_sequence *seq) | |
074fe897 | 1542 | { |
557ce264 | 1543 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1544 | __be32 status; |
1545 | ||
557ce264 | 1546 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1547 | |
abfabf8c AA |
1548 | /* Either returns 0 or nfserr_retry_uncached */ |
1549 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1550 | if (status == nfserr_retry_uncached_rep) | |
1551 | return status; | |
074fe897 | 1552 | |
557ce264 AA |
1553 | /* The sequence operation has been encoded, cstate->datap set. */ |
1554 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1555 | |
557ce264 AA |
1556 | resp->opcnt = slot->sl_opcnt; |
1557 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1558 | status = slot->sl_status; | |
074fe897 AA |
1559 | |
1560 | return status; | |
1561 | } | |
1562 | ||
0733d213 AA |
1563 | /* |
1564 | * Set the exchange_id flags returned by the server. | |
1565 | */ | |
1566 | static void | |
1567 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1568 | { | |
1569 | /* pNFS is not supported */ | |
1570 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1571 | ||
1572 | /* Referrals are supported, Migration is not. */ | |
1573 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1574 | ||
1575 | /* set the wire flags to return to client. */ | |
1576 | clid->flags = new->cl_exchange_flags; | |
1577 | } | |
1578 | ||
631fc9ea BF |
1579 | static bool client_has_state(struct nfs4_client *clp) |
1580 | { | |
1581 | /* | |
1582 | * Note clp->cl_openowners check isn't quite right: there's no | |
1583 | * need to count owners without stateid's. | |
1584 | * | |
1585 | * Also note we should probably be using this in 4.0 case too. | |
1586 | */ | |
6eccece9 BF |
1587 | return !list_empty(&clp->cl_openowners) |
1588 | || !list_empty(&clp->cl_delegations) | |
1589 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1590 | } |
1591 | ||
069b6ad4 AA |
1592 | __be32 |
1593 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1594 | struct nfsd4_compound_state *cstate, | |
1595 | struct nfsd4_exchange_id *exid) | |
1596 | { | |
0733d213 | 1597 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1598 | __be32 status; |
363168b4 | 1599 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1600 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1601 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1602 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1603 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1604 | |
363168b4 | 1605 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1606 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1607 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1608 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1609 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1610 | |
a084daf5 | 1611 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1612 | return nfserr_inval; |
1613 | ||
1614 | /* Currently only support SP4_NONE */ | |
1615 | switch (exid->spa_how) { | |
1616 | case SP4_NONE: | |
1617 | break; | |
1618 | case SP4_SSV: | |
044bc1d4 | 1619 | return nfserr_serverfault; |
0733d213 AA |
1620 | default: |
1621 | BUG(); /* checked by xdr code */ | |
1622 | case SP4_MACH_CRED: | |
1623 | return nfserr_serverfault; /* no excuse :-/ */ | |
1624 | } | |
1625 | ||
2dbb269d | 1626 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1627 | nfs4_lock_state(); |
382a62e7 | 1628 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1629 | if (conf) { |
83e08fd4 BF |
1630 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1631 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1632 | ||
136e658d BF |
1633 | if (update) { |
1634 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1635 | status = nfserr_inval; |
1a308118 BF |
1636 | goto out; |
1637 | } | |
136e658d | 1638 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1639 | status = nfserr_perm; |
136e658d BF |
1640 | goto out; |
1641 | } | |
1642 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1643 | status = nfserr_not_same; |
1644 | goto out; | |
1645 | } | |
136e658d BF |
1646 | /* case 6 */ |
1647 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1648 | new = conf; | |
1649 | goto out_copy; | |
0733d213 | 1650 | } |
136e658d | 1651 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1652 | if (client_has_state(conf)) { |
1653 | status = nfserr_clid_inuse; | |
0733d213 AA |
1654 | goto out; |
1655 | } | |
1656 | expire_client(conf); | |
1657 | goto out_new; | |
1658 | } | |
136e658d | 1659 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1660 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1661 | new = conf; |
1662 | goto out_copy; | |
1663 | } | |
1664 | /* case 5, client reboot */ | |
136e658d | 1665 | goto out_new; |
6ddbbbfe MS |
1666 | } |
1667 | ||
2dbb269d | 1668 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1669 | status = nfserr_noent; |
1670 | goto out; | |
0733d213 AA |
1671 | } |
1672 | ||
a99454aa | 1673 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1674 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1675 | expire_client(unconf); |
0733d213 | 1676 | |
2dbb269d | 1677 | /* case 1 (normal case) */ |
0733d213 | 1678 | out_new: |
2216d449 | 1679 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1680 | if (new == NULL) { |
4731030d | 1681 | status = nfserr_jukebox; |
0733d213 AA |
1682 | goto out; |
1683 | } | |
c116a0af | 1684 | new->cl_minorversion = 1; |
0733d213 | 1685 | |
c212cecf | 1686 | gen_clid(new, nn); |
ac55fdc4 | 1687 | add_to_unconfirmed(new); |
0733d213 AA |
1688 | out_copy: |
1689 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1690 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1691 | ||
778df3f0 | 1692 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1693 | nfsd4_set_ex_flags(new, exid); |
1694 | ||
1695 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1696 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1697 | status = nfs_ok; |
1698 | ||
1699 | out: | |
1700 | nfs4_unlock_state(); | |
0733d213 | 1701 | return status; |
069b6ad4 AA |
1702 | } |
1703 | ||
57b7b43b | 1704 | static __be32 |
88e588d5 | 1705 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1706 | { |
88e588d5 AA |
1707 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1708 | slot_seqid); | |
b85d4c01 BH |
1709 | |
1710 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1711 | if (slot_inuse) { |
1712 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1713 | return nfserr_jukebox; |
1714 | else | |
1715 | return nfserr_seq_misordered; | |
1716 | } | |
f6d82485 | 1717 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1718 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1719 | return nfs_ok; |
88e588d5 | 1720 | if (seqid == slot_seqid) |
b85d4c01 | 1721 | return nfserr_replay_cache; |
b85d4c01 BH |
1722 | return nfserr_seq_misordered; |
1723 | } | |
1724 | ||
49557cc7 AA |
1725 | /* |
1726 | * Cache the create session result into the create session single DRC | |
1727 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1728 | * Do this for solo or embedded create session operations. | |
1729 | */ | |
1730 | static void | |
1731 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1732 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1733 | { |
1734 | slot->sl_status = nfserr; | |
1735 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1736 | } | |
1737 | ||
1738 | static __be32 | |
1739 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1740 | struct nfsd4_clid_slot *slot) | |
1741 | { | |
1742 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1743 | return slot->sl_status; | |
1744 | } | |
1745 | ||
1b74c25b MJ |
1746 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1747 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1748 | 1 + /* MIN tag is length with zero, only length */ \ | |
1749 | 3 + /* version, opcount, opcode */ \ | |
1750 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1751 | /* seqid, slotID, slotID, cache */ \ | |
1752 | 4 ) * sizeof(__be32)) | |
1753 | ||
1754 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1755 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1756 | 1 + /* status */ \ | |
1757 | 1 + /* MIN tag is length with zero, only length */ \ | |
1758 | 3 + /* opcount, opcode, opstatus*/ \ | |
1759 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1760 | /* seqid, slotID, slotID, slotID, status */ \ | |
1761 | 5 ) * sizeof(__be32)) | |
1762 | ||
57b7b43b | 1763 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1764 | { |
1765 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1766 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1767 | } | |
1768 | ||
069b6ad4 AA |
1769 | __be32 |
1770 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1771 | struct nfsd4_compound_state *cstate, | |
1772 | struct nfsd4_create_session *cr_ses) | |
1773 | { | |
363168b4 | 1774 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1775 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1776 | struct nfsd4_session *new; |
81f0b2a4 | 1777 | struct nfsd4_conn *conn; |
49557cc7 | 1778 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1779 | __be32 status = 0; |
8daae4dc | 1780 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 1781 | |
a62573dc MJ |
1782 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1783 | return nfserr_inval; | |
49730501 BF |
1784 | if (check_forechannel_attrs(cr_ses->fore_channel)) |
1785 | return nfserr_toosmall; | |
81f0b2a4 BF |
1786 | new = alloc_session(&cr_ses->fore_channel); |
1787 | if (!new) | |
1788 | return nfserr_jukebox; | |
1789 | status = nfserr_jukebox; | |
1790 | conn = alloc_conn_from_crses(rqstp, cr_ses); | |
1791 | if (!conn) | |
1792 | goto out_free_session; | |
a62573dc | 1793 | |
ec6b5d7b | 1794 | nfs4_lock_state(); |
0a7ec377 | 1795 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 1796 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
ec6b5d7b AA |
1797 | |
1798 | if (conf) { | |
49557cc7 AA |
1799 | cs_slot = &conf->cl_cs_slot; |
1800 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1801 | if (status == nfserr_replay_cache) { |
49557cc7 | 1802 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1803 | goto out_free_conn; |
49557cc7 | 1804 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1805 | status = nfserr_seq_misordered; |
81f0b2a4 | 1806 | goto out_free_conn; |
ec6b5d7b | 1807 | } |
ec6b5d7b | 1808 | } else if (unconf) { |
8f9d3d3b | 1809 | struct nfs4_client *old; |
ec6b5d7b | 1810 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1811 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1812 | status = nfserr_clid_inuse; |
81f0b2a4 | 1813 | goto out_free_conn; |
ec6b5d7b | 1814 | } |
49557cc7 AA |
1815 | cs_slot = &unconf->cl_cs_slot; |
1816 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1817 | if (status) { |
1818 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1819 | status = nfserr_seq_misordered; |
81f0b2a4 | 1820 | goto out_free_conn; |
ec6b5d7b | 1821 | } |
382a62e7 | 1822 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
8f9d3d3b BF |
1823 | if (old) |
1824 | expire_client(old); | |
1825 | move_to_confirmed(unconf); | |
ec6b5d7b AA |
1826 | conf = unconf; |
1827 | } else { | |
1828 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1829 | goto out_free_conn; |
ec6b5d7b | 1830 | } |
81f0b2a4 | 1831 | status = nfs_ok; |
408b79bc BF |
1832 | /* |
1833 | * We do not support RDMA or persistent sessions | |
1834 | */ | |
1835 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1836 | cr_ses->flags &= ~SESSION4_RDMA; | |
1837 | ||
81f0b2a4 BF |
1838 | init_session(rqstp, new, conf, cr_ses); |
1839 | nfsd4_init_conn(rqstp, conn, new); | |
1840 | ||
ac7c46f2 | 1841 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1842 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1843 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1844 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1845 | cs_slot->sl_seqid++; |
49557cc7 | 1846 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1847 | |
49557cc7 AA |
1848 | /* cache solo and embedded create sessions under the state lock */ |
1849 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1850 | out: |
1851 | nfs4_unlock_state(); | |
1852 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1853 | return status; | |
81f0b2a4 BF |
1854 | out_free_conn: |
1855 | free_conn(conn); | |
1856 | out_free_session: | |
1857 | __free_session(new); | |
1858 | goto out; | |
069b6ad4 AA |
1859 | } |
1860 | ||
57716355 BF |
1861 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1862 | { | |
1863 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1864 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1865 | ||
1866 | return argp->opcnt == resp->opcnt; | |
1867 | } | |
1868 | ||
1d1bc8f2 BF |
1869 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1870 | { | |
1871 | switch (*dir) { | |
1872 | case NFS4_CDFC4_FORE: | |
1873 | case NFS4_CDFC4_BACK: | |
1874 | return nfs_ok; | |
1875 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1876 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1877 | *dir = NFS4_CDFC4_BOTH; | |
1878 | return nfs_ok; | |
1879 | }; | |
1880 | return nfserr_inval; | |
1881 | } | |
1882 | ||
cb73a9f4 BF |
1883 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
1884 | { | |
1885 | struct nfsd4_session *session = cstate->session; | |
1886 | ||
1887 | spin_lock(&client_lock); | |
1888 | session->se_cb_prog = bc->bc_cb_program; | |
1889 | session->se_cb_sec = bc->bc_cb_sec; | |
1890 | spin_unlock(&client_lock); | |
1891 | ||
1892 | nfsd4_probe_callback(session->se_client); | |
1893 | ||
1894 | return nfs_ok; | |
1895 | } | |
1896 | ||
1d1bc8f2 BF |
1897 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
1898 | struct nfsd4_compound_state *cstate, | |
1899 | struct nfsd4_bind_conn_to_session *bcts) | |
1900 | { | |
1901 | __be32 status; | |
3ba63671 | 1902 | struct nfsd4_conn *conn; |
1d1bc8f2 BF |
1903 | |
1904 | if (!nfsd4_last_compound_op(rqstp)) | |
1905 | return nfserr_not_only_op; | |
1906 | spin_lock(&client_lock); | |
1872de0e | 1907 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
1d1bc8f2 BF |
1908 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires |
1909 | * client_lock iself: */ | |
1910 | if (cstate->session) { | |
1911 | nfsd4_get_session(cstate->session); | |
1912 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1913 | } | |
1914 | spin_unlock(&client_lock); | |
1915 | if (!cstate->session) | |
1916 | return nfserr_badsession; | |
1917 | ||
1918 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
3ba63671 BF |
1919 | if (status) |
1920 | return status; | |
1921 | conn = alloc_conn(rqstp, bcts->dir); | |
1922 | if (!conn) | |
1923 | return nfserr_jukebox; | |
e1ff371f | 1924 | nfsd4_init_conn(rqstp, conn, cstate->session); |
3ba63671 | 1925 | return nfs_ok; |
1d1bc8f2 BF |
1926 | } |
1927 | ||
5d4cec2f BF |
1928 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1929 | { | |
1930 | if (!session) | |
1931 | return 0; | |
1932 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1933 | } | |
1934 | ||
069b6ad4 AA |
1935 | __be32 |
1936 | nfsd4_destroy_session(struct svc_rqst *r, | |
1937 | struct nfsd4_compound_state *cstate, | |
1938 | struct nfsd4_destroy_session *sessionid) | |
1939 | { | |
e10e0cfc | 1940 | struct nfsd4_session *ses; |
57b7b43b | 1941 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1942 | |
1943 | /* Notes: | |
1944 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1945 | * - Should we return nfserr_back_chan_busy if waiting for | |
1946 | * callbacks on to-be-destroyed session? | |
1947 | * - Do we need to clear any callback info from previous session? | |
1948 | */ | |
1949 | ||
5d4cec2f | 1950 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1951 | if (!nfsd4_last_compound_op(r)) |
1952 | return nfserr_not_only_op; | |
1953 | } | |
e10e0cfc | 1954 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1955 | spin_lock(&client_lock); |
1872de0e | 1956 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
e10e0cfc | 1957 | if (!ses) { |
9089f1b4 | 1958 | spin_unlock(&client_lock); |
e10e0cfc BH |
1959 | goto out; |
1960 | } | |
1961 | ||
1962 | unhash_session(ses); | |
9089f1b4 | 1963 | spin_unlock(&client_lock); |
e10e0cfc | 1964 | |
ab707e15 | 1965 | nfs4_lock_state(); |
84f5f7cc | 1966 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1967 | nfs4_unlock_state(); |
19cf5c02 | 1968 | |
508dc6e1 | 1969 | spin_lock(&client_lock); |
19cf5c02 | 1970 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1971 | nfsd4_put_session_locked(ses); |
1972 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1973 | status = nfs_ok; |
1974 | out: | |
1975 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1976 | return status; | |
069b6ad4 AA |
1977 | } |
1978 | ||
a663bdd8 | 1979 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1980 | { |
1981 | struct nfsd4_conn *c; | |
1982 | ||
1983 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1984 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1985 | return c; |
1986 | } | |
1987 | } | |
1988 | return NULL; | |
1989 | } | |
1990 | ||
a663bdd8 | 1991 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1992 | { |
1993 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1994 | struct nfsd4_conn *c; |
21b75b01 | 1995 | int ret; |
328ead28 BF |
1996 | |
1997 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1998 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1999 | if (c) { |
2000 | spin_unlock(&clp->cl_lock); | |
2001 | free_conn(new); | |
2002 | return; | |
2003 | } | |
2004 | __nfsd4_hash_conn(new, ses); | |
2005 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2006 | ret = nfsd4_register_conn(new); |
2007 | if (ret) | |
2008 | /* oops; xprt is already down: */ | |
2009 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
2010 | return; |
2011 | } | |
2012 | ||
868b89c3 MJ |
2013 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2014 | { | |
2015 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2016 | ||
2017 | return args->opcnt > session->se_fchannel.maxops; | |
2018 | } | |
2019 | ||
ae82a8d0 MJ |
2020 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2021 | struct nfsd4_session *session) | |
2022 | { | |
2023 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2024 | ||
2025 | return xb->len > session->se_fchannel.maxreq_sz; | |
2026 | } | |
2027 | ||
069b6ad4 | 2028 | __be32 |
b85d4c01 | 2029 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2030 | struct nfsd4_compound_state *cstate, |
2031 | struct nfsd4_sequence *seq) | |
2032 | { | |
f9bb94c4 | 2033 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
2034 | struct nfsd4_session *session; |
2035 | struct nfsd4_slot *slot; | |
a663bdd8 | 2036 | struct nfsd4_conn *conn; |
57b7b43b | 2037 | __be32 status; |
b85d4c01 | 2038 | |
f9bb94c4 AA |
2039 | if (resp->opcnt != 1) |
2040 | return nfserr_sequence_pos; | |
2041 | ||
a663bdd8 BF |
2042 | /* |
2043 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2044 | * below. | |
2045 | */ | |
2046 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2047 | if (!conn) | |
2048 | return nfserr_jukebox; | |
2049 | ||
9089f1b4 | 2050 | spin_lock(&client_lock); |
b85d4c01 | 2051 | status = nfserr_badsession; |
1872de0e | 2052 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
b85d4c01 BH |
2053 | if (!session) |
2054 | goto out; | |
2055 | ||
868b89c3 MJ |
2056 | status = nfserr_too_many_ops; |
2057 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
2058 | goto out; | |
2059 | ||
ae82a8d0 MJ |
2060 | status = nfserr_req_too_big; |
2061 | if (nfsd4_request_too_big(rqstp, session)) | |
2062 | goto out; | |
2063 | ||
b85d4c01 | 2064 | status = nfserr_badslot; |
6c18ba9f | 2065 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
2066 | goto out; |
2067 | ||
557ce264 | 2068 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2069 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2070 | ||
a8dfdaeb AA |
2071 | /* We do not negotiate the number of slots yet, so set the |
2072 | * maxslots to the session maxreqs which is used to encode | |
2073 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2074 | seq->maxslots = session->se_fchannel.maxreqs; | |
2075 | ||
73e79482 BF |
2076 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2077 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2078 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2079 | status = nfserr_seq_misordered; |
2080 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
2081 | goto out; | |
b85d4c01 BH |
2082 | cstate->slot = slot; |
2083 | cstate->session = session; | |
da3846a2 | 2084 | /* Return the cached reply status and set cstate->status |
557ce264 | 2085 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2086 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2087 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2088 | goto out; |
b85d4c01 BH |
2089 | } |
2090 | if (status) | |
2091 | goto out; | |
2092 | ||
a663bdd8 BF |
2093 | nfsd4_sequence_check_conn(conn, session); |
2094 | conn = NULL; | |
328ead28 | 2095 | |
b85d4c01 | 2096 | /* Success! bump slot seqid */ |
b85d4c01 | 2097 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2098 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2099 | if (seq->cachethis) |
2100 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2101 | else |
2102 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2103 | |
2104 | cstate->slot = slot; | |
2105 | cstate->session = session; | |
2106 | ||
b85d4c01 | 2107 | out: |
26c0c75e | 2108 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2109 | if (cstate->session) { |
0d7bb719 BF |
2110 | struct nfs4_client *clp = session->se_client; |
2111 | ||
36acb66b | 2112 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2113 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2114 | switch (clp->cl_cb_state) { |
2115 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2116 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2117 | break; |
2118 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2119 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2120 | break; |
fc0c3dd1 BH |
2121 | default: |
2122 | seq->status_flags = 0; | |
5423732a | 2123 | } |
aaf84eb9 | 2124 | } |
a663bdd8 | 2125 | kfree(conn); |
36acb66b | 2126 | spin_unlock(&client_lock); |
b85d4c01 BH |
2127 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2128 | return status; | |
069b6ad4 AA |
2129 | } |
2130 | ||
345c2842 MJ |
2131 | __be32 |
2132 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2133 | { | |
2134 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2135 | __be32 status = 0; |
8daae4dc | 2136 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2137 | |
2138 | nfs4_lock_state(); | |
0a7ec377 | 2139 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2140 | conf = find_confirmed_client(&dc->clientid, true, nn); |
345c2842 MJ |
2141 | |
2142 | if (conf) { | |
2143 | clp = conf; | |
2144 | ||
6eccece9 | 2145 | if (!is_client_expired(conf) && client_has_state(conf)) { |
345c2842 MJ |
2146 | status = nfserr_clientid_busy; |
2147 | goto out; | |
2148 | } | |
2149 | ||
2150 | /* rfc5661 18.50.3 */ | |
2151 | if (cstate->session && conf == cstate->session->se_client) { | |
2152 | status = nfserr_clientid_busy; | |
2153 | goto out; | |
2154 | } | |
2155 | } else if (unconf) | |
2156 | clp = unconf; | |
2157 | else { | |
2158 | status = nfserr_stale_clientid; | |
2159 | goto out; | |
2160 | } | |
2161 | ||
2162 | expire_client(clp); | |
2163 | out: | |
2164 | nfs4_unlock_state(); | |
2165 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2166 | return status; | |
2167 | } | |
2168 | ||
4dc6ec00 BF |
2169 | __be32 |
2170 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2171 | { | |
57b7b43b | 2172 | __be32 status = 0; |
bcecf1cc | 2173 | |
4dc6ec00 BF |
2174 | if (rc->rca_one_fs) { |
2175 | if (!cstate->current_fh.fh_dentry) | |
2176 | return nfserr_nofilehandle; | |
2177 | /* | |
2178 | * We don't take advantage of the rca_one_fs case. | |
2179 | * That's OK, it's optional, we can safely ignore it. | |
2180 | */ | |
2181 | return nfs_ok; | |
2182 | } | |
bcecf1cc | 2183 | |
4dc6ec00 | 2184 | nfs4_lock_state(); |
bcecf1cc | 2185 | status = nfserr_complete_already; |
a52d726b JL |
2186 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2187 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2188 | goto out; |
2189 | ||
2190 | status = nfserr_stale_clientid; | |
2191 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2192 | /* |
2193 | * The following error isn't really legal. | |
2194 | * But we only get here if the client just explicitly | |
2195 | * destroyed the client. Surely it no longer cares what | |
2196 | * error it gets back on an operation for the dead | |
2197 | * client. | |
2198 | */ | |
bcecf1cc MJ |
2199 | goto out; |
2200 | ||
2201 | status = nfs_ok; | |
2a4317c5 | 2202 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2203 | out: |
4dc6ec00 | 2204 | nfs4_unlock_state(); |
bcecf1cc | 2205 | return status; |
4dc6ec00 BF |
2206 | } |
2207 | ||
b37ad28b | 2208 | __be32 |
b591480b BF |
2209 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2210 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2211 | { |
a084daf5 | 2212 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2213 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2214 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2215 | __be32 status; |
c212cecf SK |
2216 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2217 | ||
63db4632 | 2218 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2219 | nfs4_lock_state(); |
382a62e7 | 2220 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2221 | if (conf) { |
63db4632 | 2222 | /* case 0: */ |
1da177e4 | 2223 | status = nfserr_clid_inuse; |
e203d506 BF |
2224 | if (clp_used_exchangeid(conf)) |
2225 | goto out; | |
026722c2 | 2226 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2227 | char addr_str[INET6_ADDRSTRLEN]; |
2228 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2229 | sizeof(addr_str)); | |
2230 | dprintk("NFSD: setclientid: string in use by client " | |
2231 | "at %s\n", addr_str); | |
1da177e4 LT |
2232 | goto out; |
2233 | } | |
1da177e4 | 2234 | } |
a99454aa | 2235 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2236 | if (unconf) |
2237 | expire_client(unconf); | |
3e772463 | 2238 | status = nfserr_jukebox; |
2216d449 | 2239 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2240 | if (new == NULL) |
2241 | goto out; | |
34b232bb | 2242 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2243 | /* case 1: probable callback update */ |
1da177e4 | 2244 | copy_clid(new, conf); |
34b232bb | 2245 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2246 | gen_clid(new, nn); |
8323c3b2 | 2247 | new->cl_minorversion = 0; |
6f3d772f | 2248 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2249 | add_to_unconfirmed(new); |
1da177e4 LT |
2250 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2251 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2252 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2253 | status = nfs_ok; | |
2254 | out: | |
2255 | nfs4_unlock_state(); | |
2256 | return status; | |
2257 | } | |
2258 | ||
2259 | ||
b37ad28b | 2260 | __be32 |
b591480b BF |
2261 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2262 | struct nfsd4_compound_state *cstate, | |
2263 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2264 | { |
21ab45a4 | 2265 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2266 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2267 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2268 | __be32 status; |
7f2210fa | 2269 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2270 | |
2c142baa | 2271 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2272 | return nfserr_stale_clientid; |
1da177e4 | 2273 | nfs4_lock_state(); |
21ab45a4 | 2274 | |
8daae4dc | 2275 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2276 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2277 | /* |
8695b90a BF |
2278 | * We try hard to give out unique clientid's, so if we get an |
2279 | * attempt to confirm the same clientid with a different cred, | |
2280 | * there's a bug somewhere. Let's charitably assume it's our | |
2281 | * bug. | |
a186e767 | 2282 | */ |
8695b90a BF |
2283 | status = nfserr_serverfault; |
2284 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2285 | goto out; | |
2286 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2287 | goto out; | |
63db4632 | 2288 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2289 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2290 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2291 | status = nfs_ok; |
90d700b7 BF |
2292 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2293 | status = nfserr_stale_clientid; | |
2294 | goto out; | |
2295 | } | |
2296 | status = nfs_ok; | |
2297 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2298 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2299 | nfsd4_probe_callback(conf); | |
2300 | expire_client(unconf); | |
90d700b7 | 2301 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2302 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
0d22f68f | 2303 | if (conf) |
8695b90a | 2304 | expire_client(conf); |
8695b90a | 2305 | move_to_confirmed(unconf); |
f3d03b92 | 2306 | nfsd4_probe_callback(unconf); |
08e8987c | 2307 | } |
1da177e4 | 2308 | out: |
1da177e4 LT |
2309 | nfs4_unlock_state(); |
2310 | return status; | |
2311 | } | |
2312 | ||
32513b40 BF |
2313 | static struct nfs4_file *nfsd4_alloc_file(void) |
2314 | { | |
2315 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2316 | } | |
2317 | ||
1da177e4 | 2318 | /* OPEN Share state helper functions */ |
32513b40 | 2319 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2320 | { |
1da177e4 LT |
2321 | unsigned int hashval = file_hashval(ino); |
2322 | ||
32513b40 BF |
2323 | atomic_set(&fp->fi_ref, 1); |
2324 | INIT_LIST_HEAD(&fp->fi_hash); | |
2325 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2326 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2327 | fp->fi_inode = igrab(ino); | |
2328 | fp->fi_had_conflict = false; | |
2329 | fp->fi_lease = NULL; | |
2330 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2331 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2332 | spin_lock(&recall_lock); | |
2333 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2334 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2335 | } |
2336 | ||
e60d4398 | 2337 | static void |
e18b890b | 2338 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2339 | { |
e60d4398 N |
2340 | if (*slab == NULL) |
2341 | return; | |
1a1d92c1 | 2342 | kmem_cache_destroy(*slab); |
e60d4398 | 2343 | *slab = NULL; |
1da177e4 LT |
2344 | } |
2345 | ||
e8ff2a84 | 2346 | void |
1da177e4 LT |
2347 | nfsd4_free_slabs(void) |
2348 | { | |
fe0750e5 BF |
2349 | nfsd4_free_slab(&openowner_slab); |
2350 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2351 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2352 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2353 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2354 | } |
1da177e4 | 2355 | |
72083396 | 2356 | int |
e60d4398 N |
2357 | nfsd4_init_slabs(void) |
2358 | { | |
fe0750e5 BF |
2359 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2360 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2361 | if (openowner_slab == NULL) | |
2362 | goto out_nomem; | |
2363 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2364 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2365 | if (lockowner_slab == NULL) |
e60d4398 N |
2366 | goto out_nomem; |
2367 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2368 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2369 | if (file_slab == NULL) |
2370 | goto out_nomem; | |
5ac049ac | 2371 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2372 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2373 | if (stateid_slab == NULL) |
2374 | goto out_nomem; | |
5b2d21c1 | 2375 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2376 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2377 | if (deleg_slab == NULL) |
2378 | goto out_nomem; | |
e60d4398 N |
2379 | return 0; |
2380 | out_nomem: | |
2381 | nfsd4_free_slabs(); | |
2382 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2383 | return -ENOMEM; | |
1da177e4 LT |
2384 | } |
2385 | ||
fe0750e5 BF |
2386 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2387 | { | |
2388 | kfree(oo->oo_owner.so_owner.data); | |
2389 | kmem_cache_free(openowner_slab, oo); | |
2390 | } | |
2391 | ||
2392 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2393 | { |
fe0750e5 BF |
2394 | kfree(lo->lo_owner.so_owner.data); |
2395 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2396 | } |
2397 | ||
ff194bd9 | 2398 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2399 | { |
ff194bd9 BF |
2400 | rp->rp_status = nfserr_serverfault; |
2401 | rp->rp_buflen = 0; | |
2402 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2403 | } |
2404 | ||
fe0750e5 | 2405 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2406 | { |
1da177e4 | 2407 | struct nfs4_stateowner *sop; |
1da177e4 | 2408 | |
fe0750e5 | 2409 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2410 | if (!sop) |
2411 | return NULL; | |
2412 | ||
2413 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2414 | if (!sop->so_owner.data) { | |
fe0750e5 | 2415 | kmem_cache_free(slab, sop); |
1da177e4 | 2416 | return NULL; |
ff194bd9 BF |
2417 | } |
2418 | sop->so_owner.len = owner->len; | |
2419 | ||
ea1da636 | 2420 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2421 | sop->so_client = clp; |
2422 | init_nfs4_replay(&sop->so_replay); | |
2423 | return sop; | |
2424 | } | |
2425 | ||
fe0750e5 | 2426 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2427 | { |
9b531137 SK |
2428 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2429 | ||
2430 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2431 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2432 | } |
2433 | ||
fe0750e5 | 2434 | static struct nfs4_openowner * |
ff194bd9 | 2435 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2436 | struct nfs4_openowner *oo; |
ff194bd9 | 2437 | |
fe0750e5 BF |
2438 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2439 | if (!oo) | |
ff194bd9 | 2440 | return NULL; |
fe0750e5 BF |
2441 | oo->oo_owner.so_is_open_owner = 1; |
2442 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2443 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2444 | oo->oo_time = 0; |
38c387b5 | 2445 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2446 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2447 | hash_openowner(oo, clp, strhashval); | |
2448 | return oo; | |
1da177e4 LT |
2449 | } |
2450 | ||
996e0938 | 2451 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2452 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2453 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2454 | |
996e0938 | 2455 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2456 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2457 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2458 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2459 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2460 | get_nfs4_file(fp); |
1da177e4 | 2461 | stp->st_file = fp; |
1da177e4 LT |
2462 | stp->st_access_bmap = 0; |
2463 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2464 | set_access(open->op_share_access, stp); |
ce0fc43c | 2465 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2466 | stp->st_openstp = NULL; |
1da177e4 LT |
2467 | } |
2468 | ||
fd39ca9a | 2469 | static void |
fe0750e5 | 2470 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2471 | { |
fe0750e5 | 2472 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2473 | |
fe0750e5 BF |
2474 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2475 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2476 | } |
2477 | ||
1da177e4 | 2478 | static int |
599e0a22 BF |
2479 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2480 | clientid_t *clid) | |
2481 | { | |
2482 | return (sop->so_owner.len == owner->len) && | |
2483 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2484 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2485 | } |
2486 | ||
fe0750e5 | 2487 | static struct nfs4_openowner * |
9b531137 SK |
2488 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2489 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2490 | { |
a50d2ad1 BF |
2491 | struct nfs4_stateowner *so; |
2492 | struct nfs4_openowner *oo; | |
d15c077e | 2493 | struct nfs4_client *clp; |
1da177e4 | 2494 | |
9b531137 | 2495 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2496 | if (!so->so_is_open_owner) |
2497 | continue; | |
a50d2ad1 BF |
2498 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2499 | oo = openowner(so); | |
d15c077e BF |
2500 | clp = oo->oo_owner.so_client; |
2501 | if ((bool)clp->cl_minorversion != sessions) | |
2502 | return NULL; | |
a50d2ad1 BF |
2503 | renew_client(oo->oo_owner.so_client); |
2504 | return oo; | |
2505 | } | |
1da177e4 LT |
2506 | } |
2507 | return NULL; | |
2508 | } | |
2509 | ||
2510 | /* search file_hashtbl[] for file */ | |
2511 | static struct nfs4_file * | |
2512 | find_file(struct inode *ino) | |
2513 | { | |
2514 | unsigned int hashval = file_hashval(ino); | |
2515 | struct nfs4_file *fp; | |
2516 | ||
8b671b80 | 2517 | spin_lock(&recall_lock); |
1da177e4 | 2518 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2519 | if (fp->fi_inode == ino) { |
2520 | get_nfs4_file(fp); | |
8b671b80 | 2521 | spin_unlock(&recall_lock); |
1da177e4 | 2522 | return fp; |
13cd2184 | 2523 | } |
1da177e4 | 2524 | } |
8b671b80 | 2525 | spin_unlock(&recall_lock); |
1da177e4 LT |
2526 | return NULL; |
2527 | } | |
2528 | ||
1da177e4 LT |
2529 | /* |
2530 | * Called to check deny when READ with all zero stateid or | |
2531 | * WRITE with all zero or all one stateid | |
2532 | */ | |
b37ad28b | 2533 | static __be32 |
1da177e4 LT |
2534 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2535 | { | |
2536 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2537 | struct nfs4_file *fp; | |
dcef0413 | 2538 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2539 | __be32 ret; |
1da177e4 LT |
2540 | |
2541 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2542 | ||
2543 | fp = find_file(ino); | |
13cd2184 N |
2544 | if (!fp) |
2545 | return nfs_ok; | |
b700949b | 2546 | ret = nfserr_locked; |
1da177e4 | 2547 | /* Search for conflicting share reservations */ |
13cd2184 | 2548 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2549 | if (test_deny(deny_type, stp) || |
2550 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2551 | goto out; |
1da177e4 | 2552 | } |
13cd2184 N |
2553 | ret = nfs_ok; |
2554 | out: | |
2555 | put_nfs4_file(fp); | |
2556 | return ret; | |
1da177e4 LT |
2557 | } |
2558 | ||
6b57d9c8 | 2559 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2560 | { |
1da177e4 LT |
2561 | /* We're assuming the state code never drops its reference |
2562 | * without first removing the lease. Since we're in this lease | |
2563 | * callback (and since the lease code is serialized by the kernel | |
2564 | * lock) we know the server hasn't removed the lease yet, we know | |
2565 | * it's safe to take a reference: */ | |
2566 | atomic_inc(&dp->dl_count); | |
2567 | ||
1da177e4 | 2568 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2569 | |
460781b5 | 2570 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2571 | dp->dl_time = get_seconds(); |
2572 | ||
6b57d9c8 BF |
2573 | nfsd4_cb_recall(dp); |
2574 | } | |
2575 | ||
acfdf5c3 | 2576 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2577 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2578 | { | |
acfdf5c3 BF |
2579 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2580 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2581 | |
7fa10cd1 BF |
2582 | if (!fp) { |
2583 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2584 | return; | |
2585 | } | |
2586 | if (fp->fi_had_conflict) { | |
2587 | WARN(1, "duplicate break on %p\n", fp); | |
2588 | return; | |
2589 | } | |
0272e1fd BF |
2590 | /* |
2591 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2592 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2593 | * in time: |
0272e1fd BF |
2594 | */ |
2595 | fl->fl_break_time = 0; | |
1da177e4 | 2596 | |
5d926e8c | 2597 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2598 | fp->fi_had_conflict = true; |
2599 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2600 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2601 | spin_unlock(&recall_lock); |
1da177e4 LT |
2602 | } |
2603 | ||
1da177e4 LT |
2604 | static |
2605 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2606 | { | |
2607 | if (arg & F_UNLCK) | |
2608 | return lease_modify(onlist, arg); | |
2609 | else | |
2610 | return -EAGAIN; | |
2611 | } | |
2612 | ||
7b021967 | 2613 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2614 | .lm_break = nfsd_break_deleg_cb, |
2615 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2616 | }; |
2617 | ||
7a8711c9 BF |
2618 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2619 | { | |
2620 | if (nfsd4_has_session(cstate)) | |
2621 | return nfs_ok; | |
2622 | if (seqid == so->so_seqid - 1) | |
2623 | return nfserr_replay_me; | |
2624 | if (seqid == so->so_seqid) | |
2625 | return nfs_ok; | |
2626 | return nfserr_bad_seqid; | |
2627 | } | |
1da177e4 | 2628 | |
b37ad28b | 2629 | __be32 |
6668958f AA |
2630 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2631 | struct nfsd4_open *open) | |
1da177e4 | 2632 | { |
1da177e4 LT |
2633 | clientid_t *clientid = &open->op_clientid; |
2634 | struct nfs4_client *clp = NULL; | |
2635 | unsigned int strhashval; | |
fe0750e5 | 2636 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2637 | __be32 status; |
2c142baa | 2638 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 | 2639 | |
2c142baa | 2640 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2641 | return nfserr_stale_clientid; |
32513b40 BF |
2642 | /* |
2643 | * In case we need it later, after we've already created the | |
2644 | * file and don't want to risk a further failure: | |
2645 | */ | |
2646 | open->op_file = nfsd4_alloc_file(); | |
2647 | if (open->op_file == NULL) | |
2648 | return nfserr_jukebox; | |
1da177e4 | 2649 | |
16bfdaaf | 2650 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 2651 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
2652 | open->op_openowner = oo; |
2653 | if (!oo) { | |
8daae4dc SK |
2654 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2655 | nn); | |
1da177e4 | 2656 | if (clp == NULL) |
0f442aa2 | 2657 | return nfserr_expired; |
bcf130f9 | 2658 | goto new_owner; |
1da177e4 | 2659 | } |
dad1c067 | 2660 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2661 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2662 | clp = oo->oo_owner.so_client; |
2663 | release_openowner(oo); | |
2664 | open->op_openowner = NULL; | |
bcf130f9 | 2665 | goto new_owner; |
0f442aa2 | 2666 | } |
4cdc951b BF |
2667 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2668 | if (status) | |
2669 | return status; | |
2670 | clp = oo->oo_owner.so_client; | |
2671 | goto alloc_stateid; | |
bcf130f9 BF |
2672 | new_owner: |
2673 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2674 | if (oo == NULL) | |
2675 | return nfserr_jukebox; | |
2676 | open->op_openowner = oo; | |
4cdc951b BF |
2677 | alloc_stateid: |
2678 | open->op_stp = nfs4_alloc_stateid(clp); | |
2679 | if (!open->op_stp) | |
2680 | return nfserr_jukebox; | |
0f442aa2 | 2681 | return nfs_ok; |
1da177e4 LT |
2682 | } |
2683 | ||
b37ad28b | 2684 | static inline __be32 |
4a6e43e6 N |
2685 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2686 | { | |
2687 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2688 | return nfserr_openmode; | |
2689 | else | |
2690 | return nfs_ok; | |
2691 | } | |
2692 | ||
f459e453 | 2693 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2694 | { |
f459e453 | 2695 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2696 | } |
2697 | ||
38c2f4b1 | 2698 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2699 | { |
f459e453 | 2700 | struct nfs4_stid *ret; |
24a0111e | 2701 | |
38c2f4b1 | 2702 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2703 | if (!ret) |
2704 | return NULL; | |
2705 | return delegstateid(ret); | |
24a0111e BF |
2706 | } |
2707 | ||
8b289b2c BF |
2708 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2709 | { | |
2710 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2711 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2712 | } | |
2713 | ||
b37ad28b | 2714 | static __be32 |
38c2f4b1 | 2715 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2716 | struct nfs4_delegation **dp) |
2717 | { | |
2718 | int flags; | |
b37ad28b | 2719 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2720 | |
38c2f4b1 | 2721 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2722 | if (*dp == NULL) |
c44c5eeb | 2723 | goto out; |
24a0111e | 2724 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2725 | status = nfs4_check_delegmode(*dp, flags); |
2726 | if (status) | |
2727 | *dp = NULL; | |
c44c5eeb | 2728 | out: |
8b289b2c | 2729 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2730 | return nfs_ok; |
2731 | if (status) | |
2732 | return status; | |
dad1c067 | 2733 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2734 | return nfs_ok; |
567d9829 N |
2735 | } |
2736 | ||
b37ad28b | 2737 | static __be32 |
dcef0413 | 2738 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2739 | { |
dcef0413 | 2740 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2741 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2742 | |
8beefa24 | 2743 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2744 | /* ignore lock owners */ |
2745 | if (local->st_stateowner->so_is_open_owner == 0) | |
2746 | continue; | |
2747 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2748 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2749 | *stpp = local; |
2750 | /* check for conflicting share reservations */ | |
2751 | if (!test_share(local, open)) | |
77eaae8d | 2752 | return nfserr_share_denied; |
1da177e4 | 2753 | } |
77eaae8d | 2754 | return nfs_ok; |
1da177e4 LT |
2755 | } |
2756 | ||
21fb4016 BF |
2757 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2758 | { | |
2759 | int flags = 0; | |
2760 | ||
2761 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2762 | flags |= NFSD_MAY_READ; | |
2763 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2764 | flags |= NFSD_MAY_WRITE; | |
2765 | return flags; | |
2766 | } | |
2767 | ||
0c12eaff CB |
2768 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2769 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2770 | { |
2771 | __be32 status; | |
0c12eaff CB |
2772 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2773 | int access = nfs4_access_to_access(open->op_share_access); | |
2774 | ||
f9d7562f BF |
2775 | if (!fp->fi_fds[oflag]) { |
2776 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2777 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2778 | if (status) |
2779 | return status; | |
2780 | } | |
2781 | nfs4_file_get_access(fp, oflag); | |
2782 | ||
2783 | return nfs_ok; | |
2784 | } | |
2785 | ||
b37ad28b | 2786 | static inline __be32 |
1da177e4 LT |
2787 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2788 | struct nfsd4_open *open) | |
2789 | { | |
2790 | struct iattr iattr = { | |
2791 | .ia_valid = ATTR_SIZE, | |
2792 | .ia_size = 0, | |
2793 | }; | |
2794 | if (!open->op_truncate) | |
2795 | return 0; | |
2796 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2797 | return nfserr_inval; |
1da177e4 LT |
2798 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2799 | } | |
2800 | ||
b37ad28b | 2801 | static __be32 |
dcef0413 | 2802 | 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 | 2803 | { |
b6d2f1ca | 2804 | u32 op_share_access = open->op_share_access; |
7d947842 | 2805 | bool new_access; |
b37ad28b | 2806 | __be32 status; |
1da177e4 | 2807 | |
82c5ff1b | 2808 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2809 | if (new_access) { |
0c12eaff | 2810 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2811 | if (status) |
2812 | return status; | |
6c26d08f | 2813 | } |
1da177e4 LT |
2814 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2815 | if (status) { | |
f9d7562f | 2816 | if (new_access) { |
f197c271 | 2817 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2818 | nfs4_file_put_access(fp, oflag); |
2819 | } | |
1da177e4 LT |
2820 | return status; |
2821 | } | |
2822 | /* remember the open */ | |
82c5ff1b | 2823 | set_access(op_share_access, stp); |
ce0fc43c | 2824 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2825 | |
2826 | return nfs_ok; | |
2827 | } | |
2828 | ||
2829 | ||
1da177e4 | 2830 | static void |
1255a8f3 | 2831 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2832 | { |
dad1c067 | 2833 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2834 | } |
2835 | ||
14a24e99 BF |
2836 | /* Should we give out recallable state?: */ |
2837 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2838 | { | |
2839 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2840 | return true; | |
2841 | /* | |
2842 | * In the sessions case, since we don't have to establish a | |
2843 | * separate connection for callbacks, we assume it's OK | |
2844 | * until we hear otherwise: | |
2845 | */ | |
2846 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2847 | } | |
2848 | ||
22d38c4c BF |
2849 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2850 | { | |
2851 | struct file_lock *fl; | |
2852 | ||
2853 | fl = locks_alloc_lock(); | |
2854 | if (!fl) | |
2855 | return NULL; | |
2856 | locks_init_lock(fl); | |
2857 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2858 | fl->fl_flags = FL_LEASE; | |
2859 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2860 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2861 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2862 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2863 | return fl; |
2864 | } | |
2865 | ||
edab9782 BF |
2866 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2867 | { | |
acfdf5c3 | 2868 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2869 | struct file_lock *fl; |
2870 | int status; | |
2871 | ||
2872 | fl = nfs4_alloc_init_lease(dp, flag); | |
2873 | if (!fl) | |
2874 | return -ENOMEM; | |
acfdf5c3 | 2875 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2876 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2877 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2878 | if (status) { |
acfdf5c3 | 2879 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2880 | locks_free_lock(fl); |
2881 | return -ENOMEM; | |
2882 | } | |
acfdf5c3 | 2883 | fp->fi_lease = fl; |
cb0942b8 | 2884 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
2885 | atomic_set(&fp->fi_delegees, 1); |
2886 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2887 | return 0; | |
2888 | } | |
2889 | ||
2890 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2891 | { | |
2892 | struct nfs4_file *fp = dp->dl_file; | |
2893 | ||
2894 | if (!fp->fi_lease) | |
2895 | return nfs4_setlease(dp, flag); | |
2896 | spin_lock(&recall_lock); | |
2897 | if (fp->fi_had_conflict) { | |
2898 | spin_unlock(&recall_lock); | |
2899 | return -EAGAIN; | |
2900 | } | |
2901 | atomic_inc(&fp->fi_delegees); | |
2902 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2903 | spin_unlock(&recall_lock); | |
2a74aba7 | 2904 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2905 | return 0; |
2906 | } | |
2907 | ||
4aa8913c BH |
2908 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2909 | { | |
2910 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2911 | if (status == -EAGAIN) | |
2912 | open->op_why_no_deleg = WND4_CONTENTION; | |
2913 | else { | |
2914 | open->op_why_no_deleg = WND4_RESOURCE; | |
2915 | switch (open->op_deleg_want) { | |
2916 | case NFS4_SHARE_WANT_READ_DELEG: | |
2917 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2918 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2919 | break; | |
2920 | case NFS4_SHARE_WANT_CANCEL: | |
2921 | open->op_why_no_deleg = WND4_CANCELLED; | |
2922 | break; | |
2923 | case NFS4_SHARE_WANT_NO_DELEG: | |
2924 | BUG(); /* not supposed to get here */ | |
2925 | } | |
2926 | } | |
2927 | } | |
2928 | ||
1da177e4 LT |
2929 | /* |
2930 | * Attempt to hand out a delegation. | |
2931 | */ | |
2932 | static void | |
5ccb0066 SK |
2933 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
2934 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
2935 | { |
2936 | struct nfs4_delegation *dp; | |
fe0750e5 | 2937 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2938 | int cb_up; |
d24433cd | 2939 | int status = 0, flag = 0; |
1da177e4 | 2940 | |
fe0750e5 | 2941 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2942 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2943 | open->op_recall = 0; |
2944 | switch (open->op_claim_type) { | |
2945 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2946 | if (!cb_up) |
7b190fec N |
2947 | open->op_recall = 1; |
2948 | flag = open->op_delegate_type; | |
2949 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2950 | goto out; | |
2951 | break; | |
2952 | case NFS4_OPEN_CLAIM_NULL: | |
2953 | /* Let's not give out any delegations till everyone's | |
2954 | * had the chance to reclaim theirs.... */ | |
5ccb0066 | 2955 | if (locks_in_grace(net)) |
7b190fec | 2956 | goto out; |
dad1c067 | 2957 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2958 | goto out; |
2959 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2960 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2961 | else | |
2962 | flag = NFS4_OPEN_DELEGATE_READ; | |
2963 | break; | |
2964 | default: | |
2965 | goto out; | |
2966 | } | |
1da177e4 | 2967 | |
fe0750e5 | 2968 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2969 | if (dp == NULL) |
2970 | goto out_no_deleg; | |
acfdf5c3 | 2971 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2972 | if (status) |
dd239cc0 | 2973 | goto out_free; |
1da177e4 | 2974 | |
d5477a8d | 2975 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2976 | |
8c10cbdb | 2977 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2978 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2979 | out: |
2980 | open->op_delegate_type = flag; | |
d24433cd BH |
2981 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2982 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2983 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2984 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2985 | ||
4aa8913c BH |
2986 | /* 4.1 client asking for a delegation? */ |
2987 | if (open->op_deleg_want) | |
2988 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 2989 | } |
dd239cc0 BF |
2990 | return; |
2991 | out_free: | |
acfdf5c3 | 2992 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2993 | out_no_deleg: |
2994 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2995 | goto out; | |
1da177e4 LT |
2996 | } |
2997 | ||
e27f49c3 BH |
2998 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
2999 | struct nfs4_delegation *dp) | |
3000 | { | |
3001 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3002 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3003 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3004 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3005 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3006 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3007 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3008 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3009 | } | |
3010 | /* Otherwise the client must be confused wanting a delegation | |
3011 | * it already has, therefore we don't return | |
3012 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3013 | */ | |
3014 | } | |
3015 | ||
1da177e4 LT |
3016 | /* |
3017 | * called with nfs4_lock_state() held. | |
3018 | */ | |
b37ad28b | 3019 | __be32 |
1da177e4 LT |
3020 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3021 | { | |
6668958f | 3022 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3023 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3024 | struct nfs4_file *fp = NULL; |
3025 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3026 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3027 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3028 | __be32 status; |
1da177e4 | 3029 | |
1da177e4 LT |
3030 | /* |
3031 | * Lookup file; if found, lookup stateid and check open request, | |
3032 | * and check for delegations in the process of being recalled. | |
3033 | * If not found, create the nfs4_file struct | |
3034 | */ | |
3035 | fp = find_file(ino); | |
3036 | if (fp) { | |
3037 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3038 | goto out; | |
38c2f4b1 | 3039 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3040 | if (status) |
3041 | goto out; | |
1da177e4 | 3042 | } else { |
c44c5eeb | 3043 | status = nfserr_bad_stateid; |
8b289b2c | 3044 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3045 | goto out; |
3e772463 | 3046 | status = nfserr_jukebox; |
32513b40 BF |
3047 | fp = open->op_file; |
3048 | open->op_file = NULL; | |
3049 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3050 | } |
3051 | ||
3052 | /* | |
3053 | * OPEN the file, or upgrade an existing OPEN. | |
3054 | * If truncate fails, the OPEN fails. | |
3055 | */ | |
3056 | if (stp) { | |
3057 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3058 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3059 | if (status) |
3060 | goto out; | |
3061 | } else { | |
4cdc951b | 3062 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3063 | if (status) |
3064 | goto out; | |
3065 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3066 | if (status) |
1da177e4 | 3067 | goto out; |
4cdc951b BF |
3068 | stp = open->op_stp; |
3069 | open->op_stp = NULL; | |
996e0938 | 3070 | init_open_stateid(stp, fp, open); |
1da177e4 | 3071 | } |
dcef0413 BF |
3072 | update_stateid(&stp->st_stid.sc_stateid); |
3073 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3074 | |
d24433cd | 3075 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3076 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3077 | |
d24433cd BH |
3078 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3079 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3080 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3081 | goto nodeleg; | |
3082 | } | |
3083 | } | |
3084 | ||
1da177e4 LT |
3085 | /* |
3086 | * Attempt to hand out a delegation. No error return, because the | |
3087 | * OPEN succeeds even if we fail. | |
3088 | */ | |
5ccb0066 | 3089 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3090 | nodeleg: |
1da177e4 LT |
3091 | status = nfs_ok; |
3092 | ||
8c10cbdb | 3093 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3094 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3095 | out: |
d24433cd BH |
3096 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3097 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3098 | open->op_deleg_want) |
3099 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3100 | |
13cd2184 N |
3101 | if (fp) |
3102 | put_nfs4_file(fp); | |
37515177 | 3103 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3104 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3105 | /* |
3106 | * To finish the open response, we just need to set the rflags. | |
3107 | */ | |
3108 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3109 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3110 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3111 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3112 | ||
3113 | return status; | |
3114 | } | |
3115 | ||
d29b20cd BF |
3116 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3117 | { | |
3118 | if (open->op_openowner) { | |
3119 | struct nfs4_openowner *oo = open->op_openowner; | |
3120 | ||
3121 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3122 | list_del_init(&oo->oo_close_lru); | |
3123 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3124 | if (status) { | |
3125 | release_openowner(oo); | |
3126 | open->op_openowner = NULL; | |
3127 | } else | |
3128 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3129 | } | |
3130 | } | |
32513b40 BF |
3131 | if (open->op_file) |
3132 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3133 | if (open->op_stp) |
ef79859e | 3134 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3135 | } |
3136 | ||
b37ad28b | 3137 | __be32 |
b591480b BF |
3138 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3139 | clientid_t *clid) | |
1da177e4 LT |
3140 | { |
3141 | struct nfs4_client *clp; | |
b37ad28b | 3142 | __be32 status; |
7f2210fa | 3143 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3144 | |
3145 | nfs4_lock_state(); | |
3146 | dprintk("process_renew(%08x/%08x): starting\n", | |
3147 | clid->cl_boot, clid->cl_id); | |
3148 | status = nfserr_stale_clientid; | |
2c142baa | 3149 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3150 | goto out; |
8daae4dc | 3151 | clp = find_confirmed_client(clid, cstate->minorversion, nn); |
1da177e4 LT |
3152 | status = nfserr_expired; |
3153 | if (clp == NULL) { | |
3154 | /* We assume the client took too long to RENEW. */ | |
3155 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3156 | goto out; | |
3157 | } | |
1da177e4 | 3158 | status = nfserr_cb_path_down; |
ea1da636 | 3159 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3160 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3161 | goto out; |
3162 | status = nfs_ok; | |
3163 | out: | |
3164 | nfs4_unlock_state(); | |
3165 | return status; | |
3166 | } | |
3167 | ||
a76b4319 | 3168 | static void |
5e1533c7 | 3169 | nfsd4_end_grace(struct net *net) |
a76b4319 | 3170 | { |
5e1533c7 SK |
3171 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
3172 | ||
33dcc481 | 3173 | /* do nothing if grace period already ended */ |
a51c84ed | 3174 | if (nn->grace_ended) |
33dcc481 JL |
3175 | return; |
3176 | ||
a76b4319 | 3177 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3178 | nn->grace_ended = true; |
2c142baa | 3179 | nfsd4_record_grace_done(net, nn->boot_time); |
5e1533c7 | 3180 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3181 | /* |
3182 | * Now that every NFSv4 client has had the chance to recover and | |
3183 | * to see the (possibly new, possibly shorter) lease time, we | |
3184 | * can safely set the next grace time to the current lease time: | |
3185 | */ | |
3186 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3187 | } |
3188 | ||
fd39ca9a | 3189 | static time_t |
1da177e4 LT |
3190 | nfs4_laundromat(void) |
3191 | { | |
3192 | struct nfs4_client *clp; | |
fe0750e5 | 3193 | struct nfs4_openowner *oo; |
1da177e4 LT |
3194 | struct nfs4_delegation *dp; |
3195 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3196 | time_t cutoff = get_seconds() - nfsd4_lease; |
3197 | time_t t, clientid_val = nfsd4_lease; | |
3198 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3199 | |
3200 | nfs4_lock_state(); | |
3201 | ||
3202 | dprintk("NFSD: laundromat service - starting\n"); | |
5e1533c7 | 3203 | nfsd4_end_grace(&init_net); |
36acb66b BH |
3204 | INIT_LIST_HEAD(&reaplist); |
3205 | spin_lock(&client_lock); | |
1da177e4 LT |
3206 | list_for_each_safe(pos, next, &client_lru) { |
3207 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3208 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3209 | t = clp->cl_time - cutoff; | |
3210 | if (clientid_val > t) | |
3211 | clientid_val = t; | |
3212 | break; | |
3213 | } | |
d7682988 BH |
3214 | if (atomic_read(&clp->cl_refcount)) { |
3215 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3216 | clp->cl_clientid.cl_id); | |
3217 | continue; | |
3218 | } | |
3219 | unhash_client_locked(clp); | |
3220 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3221 | } |
3222 | spin_unlock(&client_lock); | |
3223 | list_for_each_safe(pos, next, &reaplist) { | |
3224 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3225 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3226 | clp->cl_clientid.cl_id); | |
3227 | expire_client(clp); | |
3228 | } | |
1da177e4 LT |
3229 | spin_lock(&recall_lock); |
3230 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3231 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3232 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3233 | u = dp->dl_time - cutoff; | |
3234 | if (test_val > u) | |
3235 | test_val = u; | |
3236 | break; | |
3237 | } | |
1da177e4 LT |
3238 | list_move(&dp->dl_recall_lru, &reaplist); |
3239 | } | |
3240 | spin_unlock(&recall_lock); | |
3241 | list_for_each_safe(pos, next, &reaplist) { | |
3242 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3243 | unhash_delegation(dp); |
3244 | } | |
cf07d2ea | 3245 | test_val = nfsd4_lease; |
1da177e4 | 3246 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3247 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3248 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3249 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3250 | if (test_val > u) |
3251 | test_val = u; | |
3252 | break; | |
3253 | } | |
fe0750e5 | 3254 | release_openowner(oo); |
1da177e4 LT |
3255 | } |
3256 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3257 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3258 | nfs4_unlock_state(); | |
3259 | return clientid_val; | |
3260 | } | |
3261 | ||
a254b246 HH |
3262 | static struct workqueue_struct *laundry_wq; |
3263 | static void laundromat_main(struct work_struct *); | |
3264 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3265 | ||
3266 | static void | |
c4028958 | 3267 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3268 | { |
3269 | time_t t; | |
3270 | ||
3271 | t = nfs4_laundromat(); | |
3272 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3273 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3274 | } |
3275 | ||
f7a4d872 | 3276 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3277 | { |
f7a4d872 BF |
3278 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3279 | return nfserr_bad_stateid; | |
3280 | return nfs_ok; | |
1da177e4 LT |
3281 | } |
3282 | ||
3283 | static int | |
2c142baa | 3284 | STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) |
1da177e4 | 3285 | { |
2c142baa | 3286 | if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) |
e4e83ea4 BF |
3287 | return 0; |
3288 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3289 | STATEID_VAL(stateid)); |
e4e83ea4 | 3290 | return 1; |
1da177e4 LT |
3291 | } |
3292 | ||
3293 | static inline int | |
82c5ff1b | 3294 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3295 | { |
82c5ff1b JL |
3296 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3297 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3298 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3299 | } |
3300 | ||
3301 | static inline int | |
82c5ff1b | 3302 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3303 | { |
82c5ff1b JL |
3304 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3305 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3306 | } |
3307 | ||
3308 | static | |
dcef0413 | 3309 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3310 | { |
b37ad28b | 3311 | __be32 status = nfserr_openmode; |
1da177e4 | 3312 | |
02921914 BF |
3313 | /* For lock stateid's, we test the parent open, not the lock: */ |
3314 | if (stp->st_openstp) | |
3315 | stp = stp->st_openstp; | |
82c5ff1b | 3316 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3317 | goto out; |
82c5ff1b | 3318 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3319 | goto out; |
3320 | status = nfs_ok; | |
3321 | out: | |
3322 | return status; | |
3323 | } | |
3324 | ||
b37ad28b | 3325 | static inline __be32 |
5ccb0066 | 3326 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3327 | { |
203a8c8e | 3328 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3329 | return nfs_ok; |
5ccb0066 | 3330 | else if (locks_in_grace(net)) { |
25985edc | 3331 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3332 | * conflicting state; so we must wait out the grace period. */ |
3333 | return nfserr_grace; | |
3334 | } else if (flags & WR_STATE) | |
3335 | return nfs4_share_conflict(current_fh, | |
3336 | NFS4_SHARE_DENY_WRITE); | |
3337 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3338 | return nfs4_share_conflict(current_fh, | |
3339 | NFS4_SHARE_DENY_READ); | |
3340 | } | |
3341 | ||
3342 | /* | |
3343 | * Allow READ/WRITE during grace period on recovered state only for files | |
3344 | * that are not able to provide mandatory locking. | |
3345 | */ | |
3346 | static inline int | |
5ccb0066 | 3347 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3348 | { |
5ccb0066 | 3349 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3350 | } |
3351 | ||
81b82965 BF |
3352 | /* Returns true iff a is later than b: */ |
3353 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3354 | { | |
3355 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3356 | } | |
3357 | ||
57b7b43b | 3358 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3359 | { |
6668958f AA |
3360 | /* |
3361 | * When sessions are used the stateid generation number is ignored | |
3362 | * when it is zero. | |
3363 | */ | |
28dde241 | 3364 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3365 | return nfs_ok; |
3366 | ||
3367 | if (in->si_generation == ref->si_generation) | |
3368 | return nfs_ok; | |
6668958f | 3369 | |
0836f587 | 3370 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3371 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3372 | return nfserr_bad_stateid; |
3373 | /* | |
81b82965 BF |
3374 | * However, we could see a stateid from the past, even from a |
3375 | * non-buggy client. For example, if the client sends a lock | |
3376 | * while some IO is outstanding, the lock may bump si_generation | |
3377 | * while the IO is still in flight. The client could avoid that | |
3378 | * situation by waiting for responses on all the IO requests, | |
3379 | * but better performance may result in retrying IO that | |
3380 | * receives an old_stateid error if requests are rarely | |
3381 | * reordered in flight: | |
0836f587 | 3382 | */ |
81b82965 | 3383 | return nfserr_old_stateid; |
0836f587 BF |
3384 | } |
3385 | ||
7df302f7 | 3386 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3387 | { |
97b7e3b6 BF |
3388 | struct nfs4_stid *s; |
3389 | struct nfs4_ol_stateid *ols; | |
3390 | __be32 status; | |
17456804 | 3391 | |
7df302f7 CL |
3392 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3393 | return nfserr_bad_stateid; | |
3394 | /* Client debugging aid. */ | |
3395 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3396 | char addr_str[INET6_ADDRSTRLEN]; | |
3397 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3398 | sizeof(addr_str)); | |
3399 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3400 | "with incorrect client ID\n", addr_str); | |
3401 | return nfserr_bad_stateid; | |
3402 | } | |
38c2f4b1 | 3403 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3404 | if (!s) |
7df302f7 | 3405 | return nfserr_bad_stateid; |
36279ac1 | 3406 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3407 | if (status) |
97b7e3b6 BF |
3408 | return status; |
3409 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3410 | return nfs_ok; | |
3411 | ols = openlockstateid(s); | |
3412 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3413 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3414 | return nfserr_bad_stateid; |
3415 | return nfs_ok; | |
17456804 BS |
3416 | } |
3417 | ||
d15c077e | 3418 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s, bool sessions) |
38c2f4b1 BF |
3419 | { |
3420 | struct nfs4_client *cl; | |
2c142baa | 3421 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
38c2f4b1 BF |
3422 | |
3423 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3424 | return nfserr_bad_stateid; | |
2c142baa | 3425 | if (STALE_STATEID(stateid, nn)) |
38c2f4b1 | 3426 | return nfserr_stale_stateid; |
8daae4dc | 3427 | cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions, nn); |
38c2f4b1 BF |
3428 | if (!cl) |
3429 | return nfserr_expired; | |
3430 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3431 | if (!*s) | |
3432 | return nfserr_bad_stateid; | |
3433 | return nfs_ok; | |
3434 | ||
3435 | } | |
3436 | ||
1da177e4 LT |
3437 | /* |
3438 | * Checks for stateid operations | |
3439 | */ | |
b37ad28b | 3440 | __be32 |
5ccb0066 | 3441 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3442 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3443 | { |
69064a27 | 3444 | struct nfs4_stid *s; |
dcef0413 | 3445 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3446 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3447 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3448 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3449 | __be32 status; |
1da177e4 | 3450 | |
1da177e4 LT |
3451 | if (filpp) |
3452 | *filpp = NULL; | |
3453 | ||
5ccb0066 | 3454 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3455 | return nfserr_grace; |
3456 | ||
3457 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3458 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3459 | |
d15c077e | 3460 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s, cstate->minorversion); |
38c2f4b1 BF |
3461 | if (status) |
3462 | return status; | |
69064a27 BF |
3463 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3464 | if (status) | |
3465 | goto out; | |
f7a4d872 BF |
3466 | switch (s->sc_type) { |
3467 | case NFS4_DELEG_STID: | |
69064a27 | 3468 | dp = delegstateid(s); |
dc9bf700 BF |
3469 | status = nfs4_check_delegmode(dp, flags); |
3470 | if (status) | |
3471 | goto out; | |
43b0178e | 3472 | if (filpp) { |
acfdf5c3 | 3473 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3474 | BUG_ON(!*filpp); |
3475 | } | |
f7a4d872 BF |
3476 | break; |
3477 | case NFS4_OPEN_STID: | |
3478 | case NFS4_LOCK_STID: | |
69064a27 | 3479 | stp = openlockstateid(s); |
f7a4d872 BF |
3480 | status = nfs4_check_fh(current_fh, stp); |
3481 | if (status) | |
1da177e4 | 3482 | goto out; |
fe0750e5 | 3483 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3484 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3485 | goto out; |
a4455be0 BF |
3486 | status = nfs4_check_openmode(stp, flags); |
3487 | if (status) | |
1da177e4 | 3488 | goto out; |
f9d7562f BF |
3489 | if (filpp) { |
3490 | if (flags & RD_STATE) | |
3491 | *filpp = find_readable_file(stp->st_file); | |
3492 | else | |
3493 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3494 | } |
f7a4d872 BF |
3495 | break; |
3496 | default: | |
3497 | return nfserr_bad_stateid; | |
1da177e4 LT |
3498 | } |
3499 | status = nfs_ok; | |
3500 | out: | |
3501 | return status; | |
3502 | } | |
3503 | ||
e1ca12df | 3504 | static __be32 |
dcef0413 | 3505 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3506 | { |
fe0750e5 | 3507 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3508 | return nfserr_locks_held; |
3509 | release_lock_stateid(stp); | |
3510 | return nfs_ok; | |
3511 | } | |
3512 | ||
17456804 BS |
3513 | /* |
3514 | * Test if the stateid is valid | |
3515 | */ | |
3516 | __be32 | |
3517 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3518 | struct nfsd4_test_stateid *test_stateid) | |
3519 | { | |
03cfb420 BS |
3520 | struct nfsd4_test_stateid_id *stateid; |
3521 | struct nfs4_client *cl = cstate->session->se_client; | |
3522 | ||
3523 | nfs4_lock_state(); | |
3524 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3525 | stateid->ts_id_status = |
3526 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3527 | nfs4_unlock_state(); |
3528 | ||
17456804 BS |
3529 | return nfs_ok; |
3530 | } | |
3531 | ||
e1ca12df BS |
3532 | __be32 |
3533 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3534 | struct nfsd4_free_stateid *free_stateid) | |
3535 | { | |
3536 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3537 | struct nfs4_stid *s; |
38c2f4b1 | 3538 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3539 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3540 | |
3541 | nfs4_lock_state(); | |
38c2f4b1 | 3542 | s = find_stateid(cl, stateid); |
2da1cec7 | 3543 | if (!s) |
81b82965 | 3544 | goto out; |
2da1cec7 BF |
3545 | switch (s->sc_type) { |
3546 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3547 | ret = nfserr_locks_held; |
3548 | goto out; | |
2da1cec7 BF |
3549 | case NFS4_OPEN_STID: |
3550 | case NFS4_LOCK_STID: | |
3551 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3552 | if (ret) | |
3553 | goto out; | |
3554 | if (s->sc_type == NFS4_LOCK_STID) | |
3555 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3556 | else | |
3557 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3558 | break; |
3559 | default: | |
3560 | ret = nfserr_bad_stateid; | |
e1ca12df | 3561 | } |
e1ca12df BS |
3562 | out: |
3563 | nfs4_unlock_state(); | |
3564 | return ret; | |
3565 | } | |
3566 | ||
4c4cd222 N |
3567 | static inline int |
3568 | setlkflg (int type) | |
3569 | { | |
3570 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3571 | RD_STATE : WR_STATE; | |
3572 | } | |
1da177e4 | 3573 | |
dcef0413 | 3574 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3575 | { |
3576 | struct svc_fh *current_fh = &cstate->current_fh; | |
3577 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3578 | __be32 status; | |
3579 | ||
c0a5d93e BF |
3580 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3581 | if (status) | |
3582 | return status; | |
f7a4d872 BF |
3583 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3584 | /* | |
3585 | * "Closed" stateid's exist *only* to return | |
3586 | * nfserr_replay_me from the previous step. | |
3587 | */ | |
3588 | return nfserr_bad_stateid; | |
3589 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3590 | if (status) | |
3591 | return status; | |
3592 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3593 | } |
3594 | ||
1da177e4 LT |
3595 | /* |
3596 | * Checks for sequence id mutating operations. | |
3597 | */ | |
b37ad28b | 3598 | static __be32 |
dd453dfd | 3599 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3600 | stateid_t *stateid, char typemask, |
dcef0413 | 3601 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3602 | { |
0836f587 | 3603 | __be32 status; |
38c2f4b1 | 3604 | struct nfs4_stid *s; |
1da177e4 | 3605 | |
8c10cbdb BH |
3606 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3607 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3608 | |
1da177e4 | 3609 | *stpp = NULL; |
d15c077e | 3610 | status = nfsd4_lookup_stateid(stateid, typemask, &s, cstate->minorversion); |
c0a5d93e BF |
3611 | if (status) |
3612 | return status; | |
38c2f4b1 | 3613 | *stpp = openlockstateid(s); |
c0a5d93e | 3614 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3615 | |
c0a5d93e BF |
3616 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3617 | } | |
39325bd0 | 3618 | |
dcef0413 | 3619 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3620 | { |
3621 | __be32 status; | |
3622 | struct nfs4_openowner *oo; | |
1da177e4 | 3623 | |
c0a5d93e | 3624 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3625 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3626 | if (status) |
3627 | return status; | |
c0a5d93e | 3628 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3629 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3630 | return nfserr_bad_stateid; |
3a4f98bb | 3631 | return nfs_ok; |
1da177e4 LT |
3632 | } |
3633 | ||
b37ad28b | 3634 | __be32 |
ca364317 | 3635 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3636 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3637 | { |
b37ad28b | 3638 | __be32 status; |
fe0750e5 | 3639 | struct nfs4_openowner *oo; |
dcef0413 | 3640 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3641 | |
3642 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3643 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3644 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3645 | |
ca364317 | 3646 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3647 | if (status) |
3648 | return status; | |
1da177e4 LT |
3649 | |
3650 | nfs4_lock_state(); | |
3651 | ||
9072d5c6 | 3652 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3653 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3654 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3655 | if (status) |
68b66e82 | 3656 | goto out; |
fe0750e5 | 3657 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3658 | status = nfserr_bad_stateid; |
dad1c067 | 3659 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3660 | goto out; |
dad1c067 | 3661 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3662 | update_stateid(&stp->st_stid.sc_stateid); |
3663 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3664 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3665 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3666 | |
2a4317c5 | 3667 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3668 | status = nfs_ok; |
1da177e4 | 3669 | out: |
5ec094c1 BF |
3670 | if (!cstate->replay_owner) |
3671 | nfs4_unlock_state(); | |
1da177e4 LT |
3672 | return status; |
3673 | } | |
3674 | ||
6409a5a6 | 3675 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3676 | { |
82c5ff1b | 3677 | if (!test_access(access, stp)) |
6409a5a6 BF |
3678 | return; |
3679 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3680 | clear_access(access, stp); |
6409a5a6 | 3681 | } |
f197c271 | 3682 | |
6409a5a6 BF |
3683 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3684 | { | |
3685 | switch (to_access) { | |
3686 | case NFS4_SHARE_ACCESS_READ: | |
3687 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3688 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3689 | break; | |
3690 | case NFS4_SHARE_ACCESS_WRITE: | |
3691 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3692 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3693 | break; | |
3694 | case NFS4_SHARE_ACCESS_BOTH: | |
3695 | break; | |
3696 | default: | |
3697 | BUG(); | |
1da177e4 LT |
3698 | } |
3699 | } | |
3700 | ||
3701 | static void | |
ce0fc43c | 3702 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3703 | { |
3704 | int i; | |
3705 | for (i = 0; i < 4; i++) { | |
3706 | if ((i & deny) != i) | |
ce0fc43c | 3707 | clear_deny(i, stp); |
1da177e4 LT |
3708 | } |
3709 | } | |
3710 | ||
b37ad28b | 3711 | __be32 |
ca364317 BF |
3712 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3713 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3714 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3715 | { |
b37ad28b | 3716 | __be32 status; |
dcef0413 | 3717 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3718 | |
3719 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3720 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3721 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3722 | |
c30e92df | 3723 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3724 | if (od->od_deleg_want) |
3725 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3726 | od->od_deleg_want); | |
1da177e4 LT |
3727 | |
3728 | nfs4_lock_state(); | |
c0a5d93e BF |
3729 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3730 | &od->od_stateid, &stp); | |
9072d5c6 | 3731 | if (status) |
1da177e4 | 3732 | goto out; |
1da177e4 | 3733 | status = nfserr_inval; |
82c5ff1b JL |
3734 | if (!test_access(od->od_share_access, stp)) { |
3735 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3736 | stp->st_access_bmap, od->od_share_access); |
3737 | goto out; | |
3738 | } | |
ce0fc43c | 3739 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3740 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3741 | stp->st_deny_bmap, od->od_share_deny); | |
3742 | goto out; | |
3743 | } | |
6409a5a6 | 3744 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3745 | |
ce0fc43c | 3746 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3747 | |
dcef0413 BF |
3748 | update_stateid(&stp->st_stid.sc_stateid); |
3749 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3750 | status = nfs_ok; |
3751 | out: | |
5ec094c1 BF |
3752 | if (!cstate->replay_owner) |
3753 | nfs4_unlock_state(); | |
1da177e4 LT |
3754 | return status; |
3755 | } | |
3756 | ||
38c387b5 BF |
3757 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3758 | { | |
3759 | struct nfs4_openowner *oo; | |
3760 | struct nfs4_ol_stateid *s; | |
3761 | ||
3762 | if (!so->so_is_open_owner) | |
3763 | return; | |
3764 | oo = openowner(so); | |
3765 | s = oo->oo_last_closed_stid; | |
3766 | if (!s) | |
3767 | return; | |
3768 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3769 | /* Release the last_closed_stid on the next seqid bump: */ | |
3770 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3771 | return; | |
3772 | } | |
3773 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3774 | release_last_closed_stateid(oo); |
3775 | } | |
3776 | ||
3777 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3778 | { | |
3779 | unhash_open_stateid(s); | |
3780 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3781 | } |
3782 | ||
1da177e4 LT |
3783 | /* |
3784 | * nfs4_unlock_state() called after encode | |
3785 | */ | |
b37ad28b | 3786 | __be32 |
ca364317 | 3787 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3788 | struct nfsd4_close *close) |
1da177e4 | 3789 | { |
b37ad28b | 3790 | __be32 status; |
fe0750e5 | 3791 | struct nfs4_openowner *oo; |
dcef0413 | 3792 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3793 | |
3794 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3795 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3796 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3797 | |
3798 | nfs4_lock_state(); | |
f7a4d872 BF |
3799 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3800 | &close->cl_stateid, | |
3801 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3802 | &stp); | |
9072d5c6 | 3803 | if (status) |
1da177e4 | 3804 | goto out; |
fe0750e5 | 3805 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3806 | status = nfs_ok; |
dcef0413 BF |
3807 | update_stateid(&stp->st_stid.sc_stateid); |
3808 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3809 | |
f7a4d872 | 3810 | nfsd4_close_open_stateid(stp); |
cf9182e9 | 3811 | release_last_closed_stateid(oo); |
38c387b5 | 3812 | oo->oo_last_closed_stid = stp; |
04ef5954 | 3813 | |
74dbafaf BF |
3814 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3815 | if (cstate->minorversion) { | |
3816 | release_openowner(oo); | |
3817 | cstate->replay_owner = NULL; | |
3818 | } else { | |
3819 | /* | |
3820 | * In the 4.0 case we need to keep the owners around a | |
3821 | * little while to handle CLOSE replay. | |
3822 | */ | |
3823 | if (list_empty(&oo->oo_owner.so_stateids)) | |
3824 | move_to_close_lru(oo); | |
3825 | } | |
3826 | } | |
1da177e4 | 3827 | out: |
5ec094c1 BF |
3828 | if (!cstate->replay_owner) |
3829 | nfs4_unlock_state(); | |
1da177e4 LT |
3830 | return status; |
3831 | } | |
3832 | ||
b37ad28b | 3833 | __be32 |
ca364317 BF |
3834 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3835 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3836 | { |
203a8c8e BF |
3837 | struct nfs4_delegation *dp; |
3838 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3839 | struct nfs4_stid *s; |
b37ad28b | 3840 | __be32 status; |
1da177e4 | 3841 | |
ca364317 | 3842 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 3843 | return status; |
1da177e4 LT |
3844 | |
3845 | nfs4_lock_state(); | |
d15c077e | 3846 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion); |
38c2f4b1 | 3847 | if (status) |
203a8c8e | 3848 | goto out; |
38c2f4b1 | 3849 | dp = delegstateid(s); |
d5477a8d | 3850 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3851 | if (status) |
3852 | goto out; | |
203a8c8e BF |
3853 | |
3854 | unhash_delegation(dp); | |
1da177e4 | 3855 | out: |
203a8c8e BF |
3856 | nfs4_unlock_state(); |
3857 | ||
1da177e4 LT |
3858 | return status; |
3859 | } | |
3860 | ||
3861 | ||
1da177e4 | 3862 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3863 | |
009673b4 | 3864 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
1da177e4 | 3865 | |
87df4de8 BH |
3866 | static inline u64 |
3867 | end_offset(u64 start, u64 len) | |
3868 | { | |
3869 | u64 end; | |
3870 | ||
3871 | end = start + len; | |
3872 | return end >= start ? end: NFS4_MAX_UINT64; | |
3873 | } | |
3874 | ||
3875 | /* last octet in a range */ | |
3876 | static inline u64 | |
3877 | last_byte_offset(u64 start, u64 len) | |
3878 | { | |
3879 | u64 end; | |
3880 | ||
3881 | BUG_ON(!len); | |
3882 | end = start + len; | |
3883 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3884 | } | |
3885 | ||
009673b4 | 3886 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3887 | { |
3888 | return (file_hashval(inode) + cl_id | |
3889 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3890 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3891 | } |
3892 | ||
1da177e4 LT |
3893 | /* |
3894 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3895 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3896 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3897 | * locking, this prevents us from being completely protocol-compliant. The | |
3898 | * real solution to this problem is to start using unsigned file offsets in | |
3899 | * the VFS, but this is a very deep change! | |
3900 | */ | |
3901 | static inline void | |
3902 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3903 | { | |
3904 | if (lock->fl_start < 0) | |
3905 | lock->fl_start = OFFSET_MAX; | |
3906 | if (lock->fl_end < 0) | |
3907 | lock->fl_end = OFFSET_MAX; | |
3908 | } | |
3909 | ||
d5b9026a N |
3910 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3911 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3912 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3913 | }; |
1da177e4 LT |
3914 | |
3915 | static inline void | |
3916 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3917 | { | |
fe0750e5 | 3918 | struct nfs4_lockowner *lo; |
1da177e4 | 3919 | |
d5b9026a | 3920 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3921 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3922 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3923 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3924 | if (!deny->ld_owner.data) |
3925 | /* We just don't care that much */ | |
3926 | goto nevermind; | |
fe0750e5 BF |
3927 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3928 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3929 | } else { |
7c13f344 BF |
3930 | nevermind: |
3931 | deny->ld_owner.len = 0; | |
3932 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3933 | deny->ld_clientid.cl_boot = 0; |
3934 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3935 | } |
3936 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3937 | deny->ld_length = NFS4_MAX_UINT64; |
3938 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3939 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3940 | deny->ld_type = NFS4_READ_LT; | |
3941 | if (fl->fl_type != F_RDLCK) | |
3942 | deny->ld_type = NFS4_WRITE_LT; | |
3943 | } | |
3944 | ||
b93d87c1 BF |
3945 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3946 | { | |
3947 | struct nfs4_ol_stateid *lst; | |
3948 | ||
3949 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3950 | return false; | |
3951 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3952 | struct nfs4_ol_stateid, st_perstateowner); | |
3953 | return lst->st_file->fi_inode == inode; | |
3954 | } | |
3955 | ||
fe0750e5 BF |
3956 | static struct nfs4_lockowner * |
3957 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
20e9e2bc | 3958 | struct xdr_netobj *owner, struct nfsd_net *nn) |
1da177e4 | 3959 | { |
009673b4 | 3960 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3961 | struct nfs4_lockowner *lo; |
1da177e4 | 3962 | |
20e9e2bc | 3963 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3964 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3965 | return lo; | |
1da177e4 LT |
3966 | } |
3967 | return NULL; | |
3968 | } | |
3969 | ||
dcef0413 | 3970 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3971 | { |
009673b4 BF |
3972 | struct inode *inode = open_stp->st_file->fi_inode; |
3973 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3974 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
9b531137 | 3975 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
009673b4 | 3976 | |
9b531137 | 3977 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
20e9e2bc | 3978 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3979 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3980 | } |
3981 | ||
1da177e4 LT |
3982 | /* |
3983 | * Alloc a lock owner structure. | |
3984 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3985 | * occurred. |
1da177e4 | 3986 | * |
16bfdaaf | 3987 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3988 | */ |
3989 | ||
fe0750e5 | 3990 | static struct nfs4_lockowner * |
dcef0413 | 3991 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3992 | struct nfs4_lockowner *lo; |
1da177e4 | 3993 | |
fe0750e5 BF |
3994 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3995 | if (!lo) | |
1da177e4 | 3996 | return NULL; |
fe0750e5 BF |
3997 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3998 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3999 | /* It is the openowner seqid that will be incremented in encode in the |
4000 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4001 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4002 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4003 | return lo; | |
1da177e4 LT |
4004 | } |
4005 | ||
dcef0413 BF |
4006 | static struct nfs4_ol_stateid * |
4007 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4008 | { |
dcef0413 | 4009 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4010 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4011 | |
996e0938 | 4012 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4013 | if (stp == NULL) |
6136d2b4 | 4014 | return NULL; |
996e0938 | 4015 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 4016 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4017 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4018 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4019 | get_nfs4_file(fp); |
1da177e4 | 4020 | stp->st_file = fp; |
0997b173 | 4021 | stp->st_access_bmap = 0; |
1da177e4 | 4022 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4023 | stp->st_openstp = open_stp; |
1da177e4 LT |
4024 | return stp; |
4025 | } | |
4026 | ||
fd39ca9a | 4027 | static int |
1da177e4 LT |
4028 | check_lock_length(u64 offset, u64 length) |
4029 | { | |
87df4de8 | 4030 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4031 | LOFF_OVERFLOW(offset, length))); |
4032 | } | |
4033 | ||
dcef0413 | 4034 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4035 | { |
4036 | struct nfs4_file *fp = lock_stp->st_file; | |
4037 | int oflag = nfs4_access_to_omode(access); | |
4038 | ||
82c5ff1b | 4039 | if (test_access(access, lock_stp)) |
0997b173 BF |
4040 | return; |
4041 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4042 | set_access(access, lock_stp); |
0997b173 BF |
4043 | } |
4044 | ||
2355c596 | 4045 | static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new) |
64a284d0 BF |
4046 | { |
4047 | struct nfs4_file *fi = ost->st_file; | |
4048 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4049 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4050 | struct nfs4_lockowner *lo; | |
4051 | unsigned int strhashval; | |
20e9e2bc | 4052 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4053 | |
20e9e2bc SK |
4054 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
4055 | &lock->v.new.owner, nn); | |
64a284d0 BF |
4056 | if (lo) { |
4057 | if (!cstate->minorversion) | |
4058 | return nfserr_bad_seqid; | |
4059 | /* XXX: a lockowner always has exactly one stateid: */ | |
4060 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4061 | struct nfs4_ol_stateid, st_perstateowner); | |
4062 | return nfs_ok; | |
4063 | } | |
16bfdaaf | 4064 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4065 | &lock->v.new.owner); |
4066 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4067 | if (lo == NULL) | |
4068 | return nfserr_jukebox; | |
4069 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4070 | if (*lst == NULL) { | |
4071 | release_lockowner(lo); | |
4072 | return nfserr_jukebox; | |
4073 | } | |
4074 | *new = true; | |
4075 | return nfs_ok; | |
4076 | } | |
4077 | ||
1da177e4 LT |
4078 | /* |
4079 | * LOCK operation | |
4080 | */ | |
b37ad28b | 4081 | __be32 |
ca364317 | 4082 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4083 | struct nfsd4_lock *lock) |
1da177e4 | 4084 | { |
fe0750e5 BF |
4085 | struct nfs4_openowner *open_sop = NULL; |
4086 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4087 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4088 | struct file *filp = NULL; |
21179d81 JL |
4089 | struct file_lock *file_lock = NULL; |
4090 | struct file_lock *conflock = NULL; | |
b37ad28b | 4091 | __be32 status = 0; |
64a284d0 | 4092 | bool new_state = false; |
b34f27aa | 4093 | int lkflg; |
b8dd7b9a | 4094 | int err; |
7f2210fa | 4095 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4096 | |
4097 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4098 | (long long) lock->lk_offset, | |
4099 | (long long) lock->lk_length); | |
4100 | ||
1da177e4 LT |
4101 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4102 | return nfserr_inval; | |
4103 | ||
ca364317 | 4104 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4105 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4106 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4107 | return status; | |
4108 | } | |
4109 | ||
1da177e4 LT |
4110 | nfs4_lock_state(); |
4111 | ||
4112 | if (lock->lk_is_new) { | |
dcef0413 | 4113 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4114 | |
4115 | if (nfsd4_has_session(cstate)) | |
4116 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4117 | memcpy(&lock->v.new.clientid, | |
4118 | &cstate->session->se_client->cl_clientid, | |
4119 | sizeof(clientid_t)); | |
4120 | ||
1da177e4 | 4121 | status = nfserr_stale_clientid; |
2c142baa | 4122 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4123 | goto out; |
1da177e4 | 4124 | |
1da177e4 | 4125 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4126 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4127 | lock->lk_new_open_seqid, |
4128 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4129 | &open_stp); |
37515177 | 4130 | if (status) |
1da177e4 | 4131 | goto out; |
fe0750e5 | 4132 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4133 | status = nfserr_bad_stateid; |
684e5638 | 4134 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4135 | &lock->v.new.clientid)) |
4136 | goto out; | |
64a284d0 BF |
4137 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4138 | &lock_stp, &new_state); | |
e1aaa891 | 4139 | } else |
dd453dfd | 4140 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4141 | lock->lk_old_lock_seqid, |
4142 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4143 | NFS4_LOCK_STID, &lock_stp); |
e1aaa891 BF |
4144 | if (status) |
4145 | goto out; | |
64a284d0 | 4146 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4147 | |
b34f27aa BF |
4148 | lkflg = setlkflg(lock->lk_type); |
4149 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4150 | if (status) | |
4151 | goto out; | |
4152 | ||
0dd395dc | 4153 | status = nfserr_grace; |
5ccb0066 | 4154 | if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) |
0dd395dc N |
4155 | goto out; |
4156 | status = nfserr_no_grace; | |
5ccb0066 | 4157 | if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) |
0dd395dc N |
4158 | goto out; |
4159 | ||
21179d81 JL |
4160 | file_lock = locks_alloc_lock(); |
4161 | if (!file_lock) { | |
4162 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4163 | status = nfserr_jukebox; | |
4164 | goto out; | |
4165 | } | |
4166 | ||
4167 | locks_init_lock(file_lock); | |
1da177e4 LT |
4168 | switch (lock->lk_type) { |
4169 | case NFS4_READ_LT: | |
4170 | case NFS4_READW_LT: | |
0997b173 BF |
4171 | filp = find_readable_file(lock_stp->st_file); |
4172 | if (filp) | |
4173 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4174 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4175 | break; |
1da177e4 LT |
4176 | case NFS4_WRITE_LT: |
4177 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4178 | filp = find_writeable_file(lock_stp->st_file); |
4179 | if (filp) | |
4180 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4181 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4182 | break; |
1da177e4 LT |
4183 | default: |
4184 | status = nfserr_inval; | |
4185 | goto out; | |
4186 | } | |
f9d7562f BF |
4187 | if (!filp) { |
4188 | status = nfserr_openmode; | |
4189 | goto out; | |
4190 | } | |
21179d81 JL |
4191 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4192 | file_lock->fl_pid = current->tgid; | |
4193 | file_lock->fl_file = filp; | |
4194 | file_lock->fl_flags = FL_POSIX; | |
4195 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4196 | file_lock->fl_start = lock->lk_offset; | |
4197 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4198 | nfs4_transform_lock_offset(file_lock); | |
4199 | ||
4200 | conflock = locks_alloc_lock(); | |
4201 | if (!conflock) { | |
4202 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4203 | status = nfserr_jukebox; | |
4204 | goto out; | |
4205 | } | |
1da177e4 | 4206 | |
21179d81 | 4207 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4208 | switch (-err) { |
1da177e4 | 4209 | case 0: /* success! */ |
dcef0413 BF |
4210 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4211 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4212 | sizeof(stateid_t)); |
b8dd7b9a | 4213 | status = 0; |
eb76b3fd AA |
4214 | break; |
4215 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4216 | status = nfserr_denied; | |
4217 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4218 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4219 | break; |
1da177e4 LT |
4220 | case (EDEADLK): |
4221 | status = nfserr_deadlock; | |
eb76b3fd | 4222 | break; |
3e772463 | 4223 | default: |
fd85b817 | 4224 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4225 | status = nfserrno(err); |
eb76b3fd | 4226 | break; |
1da177e4 | 4227 | } |
1da177e4 | 4228 | out: |
64a284d0 | 4229 | if (status && new_state) |
f044ff83 | 4230 | release_lockowner(lock_sop); |
5ec094c1 BF |
4231 | if (!cstate->replay_owner) |
4232 | nfs4_unlock_state(); | |
21179d81 JL |
4233 | if (file_lock) |
4234 | locks_free_lock(file_lock); | |
4235 | if (conflock) | |
4236 | locks_free_lock(conflock); | |
1da177e4 LT |
4237 | return status; |
4238 | } | |
4239 | ||
55ef1274 BF |
4240 | /* |
4241 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4242 | * so we do a temporary open here just to get an open file to pass to | |
4243 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4244 | * inode operation.) | |
4245 | */ | |
04da6e9d | 4246 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4247 | { |
4248 | struct file *file; | |
04da6e9d AV |
4249 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4250 | if (!err) { | |
4251 | err = nfserrno(vfs_test_lock(file, lock)); | |
4252 | nfsd_close(file); | |
4253 | } | |
55ef1274 BF |
4254 | return err; |
4255 | } | |
4256 | ||
1da177e4 LT |
4257 | /* |
4258 | * LOCKT operation | |
4259 | */ | |
b37ad28b | 4260 | __be32 |
ca364317 BF |
4261 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4262 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4263 | { |
4264 | struct inode *inode; | |
21179d81 | 4265 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4266 | struct nfs4_lockowner *lo; |
b37ad28b | 4267 | __be32 status; |
7f2210fa | 4268 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4269 | |
5ccb0066 | 4270 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4271 | return nfserr_grace; |
4272 | ||
4273 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4274 | return nfserr_inval; | |
4275 | ||
1da177e4 LT |
4276 | nfs4_lock_state(); |
4277 | ||
4278 | status = nfserr_stale_clientid; | |
2c142baa | 4279 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) |
1da177e4 | 4280 | goto out; |
1da177e4 | 4281 | |
75c096f7 | 4282 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4283 | goto out; |
1da177e4 | 4284 | |
ca364317 | 4285 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4286 | file_lock = locks_alloc_lock(); |
4287 | if (!file_lock) { | |
4288 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4289 | status = nfserr_jukebox; | |
4290 | goto out; | |
4291 | } | |
4292 | locks_init_lock(file_lock); | |
1da177e4 LT |
4293 | switch (lockt->lt_type) { |
4294 | case NFS4_READ_LT: | |
4295 | case NFS4_READW_LT: | |
21179d81 | 4296 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4297 | break; |
4298 | case NFS4_WRITE_LT: | |
4299 | case NFS4_WRITEW_LT: | |
21179d81 | 4300 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4301 | break; |
4302 | default: | |
2fdada03 | 4303 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4304 | status = nfserr_inval; |
4305 | goto out; | |
4306 | } | |
4307 | ||
20e9e2bc | 4308 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4309 | if (lo) |
21179d81 JL |
4310 | file_lock->fl_owner = (fl_owner_t)lo; |
4311 | file_lock->fl_pid = current->tgid; | |
4312 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4313 | |
21179d81 JL |
4314 | file_lock->fl_start = lockt->lt_offset; |
4315 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4316 | |
21179d81 | 4317 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4318 | |
21179d81 | 4319 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4320 | if (status) |
fd85b817 | 4321 | goto out; |
04da6e9d | 4322 | |
21179d81 | 4323 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4324 | status = nfserr_denied; |
21179d81 | 4325 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4326 | } |
4327 | out: | |
4328 | nfs4_unlock_state(); | |
21179d81 JL |
4329 | if (file_lock) |
4330 | locks_free_lock(file_lock); | |
1da177e4 LT |
4331 | return status; |
4332 | } | |
4333 | ||
b37ad28b | 4334 | __be32 |
ca364317 | 4335 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4336 | struct nfsd4_locku *locku) |
1da177e4 | 4337 | { |
dcef0413 | 4338 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4339 | struct file *filp = NULL; |
21179d81 | 4340 | struct file_lock *file_lock = NULL; |
b37ad28b | 4341 | __be32 status; |
b8dd7b9a | 4342 | int err; |
1da177e4 LT |
4343 | |
4344 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4345 | (long long) locku->lu_offset, | |
4346 | (long long) locku->lu_length); | |
4347 | ||
4348 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4349 | return nfserr_inval; | |
4350 | ||
4351 | nfs4_lock_state(); | |
4352 | ||
9072d5c6 | 4353 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4354 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4355 | if (status) |
1da177e4 | 4356 | goto out; |
f9d7562f BF |
4357 | filp = find_any_file(stp->st_file); |
4358 | if (!filp) { | |
4359 | status = nfserr_lock_range; | |
4360 | goto out; | |
4361 | } | |
21179d81 JL |
4362 | file_lock = locks_alloc_lock(); |
4363 | if (!file_lock) { | |
4364 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4365 | status = nfserr_jukebox; | |
4366 | goto out; | |
4367 | } | |
4368 | locks_init_lock(file_lock); | |
4369 | file_lock->fl_type = F_UNLCK; | |
4370 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); | |
4371 | file_lock->fl_pid = current->tgid; | |
4372 | file_lock->fl_file = filp; | |
4373 | file_lock->fl_flags = FL_POSIX; | |
4374 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4375 | file_lock->fl_start = locku->lu_offset; | |
4376 | ||
4377 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4378 | locku->lu_length); | |
4379 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 LT |
4380 | |
4381 | /* | |
4382 | * Try to unlock the file in the VFS. | |
4383 | */ | |
21179d81 | 4384 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4385 | if (err) { |
fd85b817 | 4386 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4387 | goto out_nfserr; |
4388 | } | |
4389 | /* | |
4390 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4391 | */ | |
dcef0413 BF |
4392 | update_stateid(&stp->st_stid.sc_stateid); |
4393 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4394 | |
4395 | out: | |
71c3bcd7 BF |
4396 | if (!cstate->replay_owner) |
4397 | nfs4_unlock_state(); | |
21179d81 JL |
4398 | if (file_lock) |
4399 | locks_free_lock(file_lock); | |
1da177e4 LT |
4400 | return status; |
4401 | ||
4402 | out_nfserr: | |
b8dd7b9a | 4403 | status = nfserrno(err); |
1da177e4 LT |
4404 | goto out; |
4405 | } | |
4406 | ||
4407 | /* | |
4408 | * returns | |
4409 | * 1: locks held by lockowner | |
4410 | * 0: no locks held by lockowner | |
4411 | */ | |
4412 | static int | |
fe0750e5 | 4413 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4414 | { |
4415 | struct file_lock **flpp; | |
f9d7562f | 4416 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4417 | int status = 0; |
4418 | ||
b89f4321 | 4419 | lock_flocks(); |
1da177e4 | 4420 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4421 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4422 | status = 1; |
4423 | goto out; | |
796dadfd | 4424 | } |
1da177e4 LT |
4425 | } |
4426 | out: | |
b89f4321 | 4427 | unlock_flocks(); |
1da177e4 LT |
4428 | return status; |
4429 | } | |
4430 | ||
b37ad28b | 4431 | __be32 |
b591480b BF |
4432 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4433 | struct nfsd4_compound_state *cstate, | |
4434 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4435 | { |
4436 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4437 | struct nfs4_stateowner *sop; |
fe0750e5 | 4438 | struct nfs4_lockowner *lo; |
dcef0413 | 4439 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4440 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4441 | struct list_head matches; |
16bfdaaf | 4442 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4443 | __be32 status; |
7f2210fa | 4444 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4445 | |
4446 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4447 | clid->cl_boot, clid->cl_id); | |
4448 | ||
4449 | /* XXX check for lease expiration */ | |
4450 | ||
4451 | status = nfserr_stale_clientid; | |
2c142baa | 4452 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 4453 | return status; |
1da177e4 LT |
4454 | |
4455 | nfs4_lock_state(); | |
4456 | ||
3e9e3dbe | 4457 | status = nfserr_locks_held; |
3e9e3dbe | 4458 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4459 | |
9b531137 | 4460 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
4461 | if (sop->so_is_open_owner) |
4462 | continue; | |
06f1f864 BF |
4463 | if (!same_owner_str(sop, owner, clid)) |
4464 | continue; | |
4465 | list_for_each_entry(stp, &sop->so_stateids, | |
4466 | st_perstateowner) { | |
4467 | lo = lockowner(sop); | |
4468 | if (check_for_locks(stp->st_file, lo)) | |
4469 | goto out; | |
4470 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4471 | } |
3e9e3dbe N |
4472 | } |
4473 | /* Clients probably won't expect us to return with some (but not all) | |
4474 | * of the lockowner state released; so don't release any until all | |
4475 | * have been checked. */ | |
4476 | status = nfs_ok; | |
0fa822e4 | 4477 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4478 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4479 | lo_list); | |
0fa822e4 N |
4480 | /* unhash_stateowner deletes so_perclient only |
4481 | * for openowners. */ | |
fe0750e5 BF |
4482 | list_del(&lo->lo_list); |
4483 | release_lockowner(lo); | |
1da177e4 LT |
4484 | } |
4485 | out: | |
4486 | nfs4_unlock_state(); | |
4487 | return status; | |
4488 | } | |
4489 | ||
4490 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4491 | alloc_reclaim(void) |
1da177e4 | 4492 | { |
a55370a3 | 4493 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4494 | } |
4495 | ||
0ce0c2b5 | 4496 | bool |
52e19c09 | 4497 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4498 | { |
0ce0c2b5 | 4499 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4500 | |
52e19c09 | 4501 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4502 | return (crp && crp->cr_clp); |
c7b9a459 N |
4503 | } |
4504 | ||
1da177e4 LT |
4505 | /* |
4506 | * failure => all reset bets are off, nfserr_no_grace... | |
4507 | */ | |
772a9bbb | 4508 | struct nfs4_client_reclaim * |
52e19c09 | 4509 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4510 | { |
4511 | unsigned int strhashval; | |
772a9bbb | 4512 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4513 | |
a55370a3 N |
4514 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4515 | crp = alloc_reclaim(); | |
772a9bbb JL |
4516 | if (crp) { |
4517 | strhashval = clientstr_hashval(name); | |
4518 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4519 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4520 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4521 | crp->cr_clp = NULL; |
52e19c09 | 4522 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4523 | } |
4524 | return crp; | |
1da177e4 LT |
4525 | } |
4526 | ||
ce30e539 | 4527 | void |
52e19c09 | 4528 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4529 | { |
4530 | list_del(&crp->cr_strhash); | |
4531 | kfree(crp); | |
52e19c09 | 4532 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4533 | } |
4534 | ||
2a4317c5 | 4535 | void |
52e19c09 | 4536 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4537 | { |
4538 | struct nfs4_client_reclaim *crp = NULL; | |
4539 | int i; | |
4540 | ||
1da177e4 | 4541 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4542 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4543 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4544 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4545 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4546 | } |
4547 | } | |
52e19c09 | 4548 | BUG_ON(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4549 | } |
4550 | ||
4551 | /* | |
4552 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4553 | struct nfs4_client_reclaim * |
52e19c09 | 4554 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4555 | { |
4556 | unsigned int strhashval; | |
1da177e4 LT |
4557 | struct nfs4_client_reclaim *crp = NULL; |
4558 | ||
278c931c | 4559 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4560 | |
278c931c | 4561 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4562 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4563 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4564 | return crp; |
4565 | } | |
4566 | } | |
4567 | return NULL; | |
4568 | } | |
4569 | ||
4570 | /* | |
4571 | * Called from OPEN. Look for clientid in reclaim list. | |
4572 | */ | |
b37ad28b | 4573 | __be32 |
d15c077e | 4574 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions) |
1da177e4 | 4575 | { |
a52d726b | 4576 | struct nfs4_client *clp; |
8daae4dc | 4577 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
a52d726b JL |
4578 | |
4579 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4580 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4581 | if (clp == NULL) |
4582 | return nfserr_reclaim_bad; | |
4583 | ||
4584 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4585 | } |
4586 | ||
65178db4 BS |
4587 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4588 | ||
4589 | void nfsd_forget_clients(u64 num) | |
4590 | { | |
4591 | struct nfs4_client *clp, *next; | |
4592 | int count = 0; | |
4593 | ||
4594 | nfs4_lock_state(); | |
4595 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
65178db4 BS |
4596 | expire_client(clp); |
4597 | if (++count == num) | |
4598 | break; | |
4599 | } | |
4600 | nfs4_unlock_state(); | |
4601 | ||
4602 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4603 | } | |
4604 | ||
4605 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4606 | { | |
4607 | release_lockowner(lockowner(sop)); | |
4608 | } | |
4609 | ||
4610 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4611 | { | |
4612 | release_openowner(openowner(sop)); | |
4613 | } | |
4614 | ||
353de31b | 4615 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
9b531137 SK |
4616 | void (*release_sop)(struct nfs4_stateowner *), |
4617 | struct nfsd_net *nn) | |
65178db4 BS |
4618 | { |
4619 | int i, count = 0; | |
4620 | struct nfs4_stateowner *sop, *next; | |
4621 | ||
16bfdaaf | 4622 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
9b531137 | 4623 | list_for_each_entry_safe(sop, next, &nn->ownerstr_hashtbl[i], so_strhash) { |
16bfdaaf BF |
4624 | if (sop->so_is_open_owner != is_open_owner) |
4625 | continue; | |
65178db4 BS |
4626 | release_sop(sop); |
4627 | if (++count == num) | |
4628 | return count; | |
4629 | } | |
4630 | } | |
4631 | return count; | |
4632 | } | |
4633 | ||
4634 | void nfsd_forget_locks(u64 num) | |
4635 | { | |
4636 | int count; | |
9b531137 | 4637 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
65178db4 BS |
4638 | |
4639 | nfs4_lock_state(); | |
9b531137 | 4640 | count = nfsd_release_n_owners(num, false, release_lockowner_sop, nn); |
65178db4 BS |
4641 | nfs4_unlock_state(); |
4642 | ||
4643 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4644 | } | |
4645 | ||
4646 | void nfsd_forget_openowners(u64 num) | |
4647 | { | |
4648 | int count; | |
9b531137 | 4649 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
65178db4 BS |
4650 | |
4651 | nfs4_lock_state(); | |
9b531137 | 4652 | count = nfsd_release_n_owners(num, true, release_openowner_sop, nn); |
65178db4 BS |
4653 | nfs4_unlock_state(); |
4654 | ||
4655 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4656 | } | |
4657 | ||
da5c80a9 | 4658 | static int nfsd_process_n_delegations(u64 num, struct list_head *list) |
65178db4 BS |
4659 | { |
4660 | int i, count = 0; | |
2d3475c0 BS |
4661 | struct nfs4_file *fp, *fnext; |
4662 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4663 | |
4664 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4665 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4666 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
a6d88f29 | 4667 | list_move(&dp->dl_recall_lru, list); |
65178db4 BS |
4668 | if (++count == num) |
4669 | return count; | |
4670 | } | |
4671 | } | |
4672 | } | |
2d3475c0 | 4673 | |
65178db4 BS |
4674 | return count; |
4675 | } | |
4676 | ||
4677 | void nfsd_forget_delegations(u64 num) | |
4678 | { | |
4679 | unsigned int count; | |
a6d88f29 SK |
4680 | LIST_HEAD(victims); |
4681 | struct nfs4_delegation *dp, *dnext; | |
4682 | ||
4683 | spin_lock(&recall_lock); | |
4684 | count = nfsd_process_n_delegations(num, &victims); | |
4685 | spin_unlock(&recall_lock); | |
65178db4 BS |
4686 | |
4687 | nfs4_lock_state(); | |
a6d88f29 SK |
4688 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) |
4689 | unhash_delegation(dp); | |
65178db4 BS |
4690 | nfs4_unlock_state(); |
4691 | ||
4692 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4693 | } | |
4694 | ||
4695 | void nfsd_recall_delegations(u64 num) | |
4696 | { | |
4697 | unsigned int count; | |
a6d88f29 SK |
4698 | LIST_HEAD(victims); |
4699 | struct nfs4_delegation *dp, *dnext; | |
65178db4 | 4700 | |
65178db4 | 4701 | spin_lock(&recall_lock); |
a6d88f29 SK |
4702 | count = nfsd_process_n_delegations(num, &victims); |
4703 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { | |
4704 | list_del(&dp->dl_recall_lru); | |
4705 | nfsd_break_one_deleg(dp); | |
4706 | } | |
65178db4 | 4707 | spin_unlock(&recall_lock); |
65178db4 BS |
4708 | |
4709 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4710 | } | |
4711 | ||
4712 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4713 | ||
ac4d8ff2 | 4714 | /* initialization to perform at module load time: */ |
1da177e4 | 4715 | |
72083396 | 4716 | void |
ac4d8ff2 | 4717 | nfs4_state_init(void) |
1da177e4 | 4718 | { |
72083396 | 4719 | int i; |
1da177e4 | 4720 | |
1da177e4 LT |
4721 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4722 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4723 | } | |
1da177e4 LT |
4724 | INIT_LIST_HEAD(&close_lru); |
4725 | INIT_LIST_HEAD(&client_lru); | |
4726 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
4727 | } |
4728 | ||
c2f1a551 MS |
4729 | /* |
4730 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4731 | * client may quite reasonably hang on to a delegation as long as it has | |
4732 | * the inode cached. This becomes an obvious problem the first time a | |
4733 | * client's inode cache approaches the size of the server's total memory. | |
4734 | * | |
4735 | * For now we avoid this problem by imposing a hard limit on the number | |
4736 | * of delegations, which varies according to the server's memory size. | |
4737 | */ | |
4738 | static void | |
4739 | set_max_delegations(void) | |
4740 | { | |
4741 | /* | |
4742 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4743 | * estimates suggest that in the worst case (where every delegation | |
4744 | * is for a different inode), a delegation could take about 1.5K, | |
4745 | * giving a worst case usage of about 6% of memory. | |
4746 | */ | |
4747 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4748 | } | |
4749 | ||
8daae4dc SK |
4750 | static int nfs4_state_start_net(struct net *net) |
4751 | { | |
4752 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4753 | int i; | |
4754 | ||
4755 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
4756 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4757 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 4758 | goto err; |
0a7ec377 SK |
4759 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
4760 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4761 | if (!nn->unconf_id_hashtbl) | |
4762 | goto err_unconf_id; | |
9b531137 SK |
4763 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
4764 | OWNER_HASH_SIZE, GFP_KERNEL); | |
4765 | if (!nn->ownerstr_hashtbl) | |
4766 | goto err_ownerstr; | |
20e9e2bc SK |
4767 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
4768 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); | |
4769 | if (!nn->lockowner_ino_hashtbl) | |
4770 | goto err_lockowner_ino; | |
1872de0e SK |
4771 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
4772 | SESSION_HASH_SIZE, GFP_KERNEL); | |
4773 | if (!nn->sessionid_hashtbl) | |
4774 | goto err_sessionid; | |
8daae4dc | 4775 | |
382a62e7 | 4776 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 4777 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 4778 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 4779 | } |
9b531137 SK |
4780 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
4781 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
20e9e2bc SK |
4782 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4783 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); | |
1872de0e SK |
4784 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4785 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 4786 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 4787 | nn->unconf_name_tree = RB_ROOT; |
8daae4dc SK |
4788 | |
4789 | return 0; | |
382a62e7 | 4790 | |
1872de0e SK |
4791 | err_sessionid: |
4792 | kfree(nn->lockowner_ino_hashtbl); | |
20e9e2bc SK |
4793 | err_lockowner_ino: |
4794 | kfree(nn->ownerstr_hashtbl); | |
9b531137 SK |
4795 | err_ownerstr: |
4796 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
4797 | err_unconf_id: |
4798 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
4799 | err: |
4800 | return -ENOMEM; | |
8daae4dc SK |
4801 | } |
4802 | ||
4803 | static void | |
4804 | __nfs4_state_shutdown_net(struct net *net) | |
4805 | { | |
4806 | int i; | |
4807 | struct nfs4_client *clp = NULL; | |
4808 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
a99454aa | 4809 | struct rb_node *node, *tmp; |
8daae4dc SK |
4810 | |
4811 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
4812 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
4813 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4814 | destroy_client(clp); | |
4815 | } | |
4816 | } | |
a99454aa SK |
4817 | |
4818 | node = rb_first(&nn->unconf_name_tree); | |
4819 | while (node != NULL) { | |
4820 | tmp = node; | |
4821 | node = rb_next(tmp); | |
4822 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
4823 | rb_erase(tmp, &nn->unconf_name_tree); | |
4824 | destroy_client(clp); | |
4825 | } | |
4826 | ||
1872de0e | 4827 | kfree(nn->sessionid_hashtbl); |
20e9e2bc | 4828 | kfree(nn->lockowner_ino_hashtbl); |
9b531137 | 4829 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 4830 | kfree(nn->unconf_id_hashtbl); |
8daae4dc SK |
4831 | kfree(nn->conf_id_hashtbl); |
4832 | } | |
4833 | ||
ac4d8ff2 N |
4834 | /* initialization to perform when the nfsd service is started: */ |
4835 | ||
a6d6b781 JL |
4836 | int |
4837 | nfs4_state_start(void) | |
ac4d8ff2 | 4838 | { |
5e1533c7 SK |
4839 | struct net *net = &init_net; |
4840 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b5a1a81e BF |
4841 | int ret; |
4842 | ||
2a4317c5 JL |
4843 | /* |
4844 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4845 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4846 | * need to pass a net pointer into this function, take a reference | |
4847 | * to that instead and then do most of the rest of this on a per-net | |
4848 | * basis. | |
4849 | */ | |
5e1533c7 | 4850 | get_net(net); |
8daae4dc SK |
4851 | ret = nfs4_state_start_net(net); |
4852 | if (ret) | |
4853 | return ret; | |
5e1533c7 | 4854 | nfsd4_client_tracking_init(net); |
2c142baa | 4855 | nn->boot_time = get_seconds(); |
5ccb0066 | 4856 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 4857 | nn->grace_ended = false; |
9a8db97e | 4858 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4859 | nfsd4_grace); |
b5a1a81e | 4860 | ret = set_callback_cred(); |
a6d6b781 JL |
4861 | if (ret) { |
4862 | ret = -ENOMEM; | |
4863 | goto out_recovery; | |
4864 | } | |
58da282b | 4865 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4866 | if (laundry_wq == NULL) { |
4867 | ret = -ENOMEM; | |
4868 | goto out_recovery; | |
4869 | } | |
b5a1a81e BF |
4870 | ret = nfsd4_create_callback_queue(); |
4871 | if (ret) | |
4872 | goto out_free_laundry; | |
e46b498c | 4873 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4874 | set_max_delegations(); |
b5a1a81e BF |
4875 | return 0; |
4876 | out_free_laundry: | |
4877 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4878 | out_recovery: |
5e1533c7 | 4879 | nfsd4_client_tracking_exit(net); |
8daae4dc | 4880 | __nfs4_state_shutdown_net(net); |
5e1533c7 | 4881 | put_net(net); |
b5a1a81e | 4882 | return ret; |
1da177e4 LT |
4883 | } |
4884 | ||
ac55fdc4 | 4885 | /* should be called with the state lock held */ |
1da177e4 | 4886 | static void |
8daae4dc | 4887 | __nfs4_state_shutdown(struct net *net) |
1da177e4 | 4888 | { |
1da177e4 | 4889 | struct nfs4_delegation *dp = NULL; |
1da177e4 LT |
4890 | struct list_head *pos, *next, reaplist; |
4891 | ||
8daae4dc | 4892 | __nfs4_state_shutdown_net(net); |
ac55fdc4 | 4893 | |
1da177e4 LT |
4894 | INIT_LIST_HEAD(&reaplist); |
4895 | spin_lock(&recall_lock); | |
4896 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4897 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4898 | list_move(&dp->dl_recall_lru, &reaplist); | |
4899 | } | |
4900 | spin_unlock(&recall_lock); | |
4901 | list_for_each_safe(pos, next, &reaplist) { | |
4902 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4903 | unhash_delegation(dp); |
4904 | } | |
4905 | ||
2a4317c5 JL |
4906 | nfsd4_client_tracking_exit(&init_net); |
4907 | put_net(&init_net); | |
1da177e4 LT |
4908 | } |
4909 | ||
4910 | void | |
4911 | nfs4_state_shutdown(void) | |
4912 | { | |
5e1533c7 SK |
4913 | struct net *net = &init_net; |
4914 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4915 | ||
afe2c511 | 4916 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4917 | destroy_workqueue(laundry_wq); |
5e1533c7 | 4918 | locks_end_grace(&nn->nfsd4_manager); |
1da177e4 | 4919 | nfs4_lock_state(); |
8daae4dc | 4920 | __nfs4_state_shutdown(net); |
1da177e4 | 4921 | nfs4_unlock_state(); |
c3935e30 | 4922 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4923 | } |
8b70484c TM |
4924 | |
4925 | static void | |
4926 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4927 | { | |
37c593c5 TM |
4928 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4929 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4930 | } |
4931 | ||
4932 | static void | |
4933 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4934 | { | |
37c593c5 TM |
4935 | if (cstate->minorversion) { |
4936 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4937 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4938 | } | |
4939 | } | |
4940 | ||
4941 | void | |
4942 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4943 | { | |
4944 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4945 | } |
4946 | ||
62cd4a59 TM |
4947 | /* |
4948 | * functions to set current state id | |
4949 | */ | |
9428fe1a TM |
4950 | void |
4951 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4952 | { | |
4953 | put_stateid(cstate, &odp->od_stateid); | |
4954 | } | |
4955 | ||
8b70484c TM |
4956 | void |
4957 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4958 | { | |
4959 | put_stateid(cstate, &open->op_stateid); | |
4960 | } | |
4961 | ||
62cd4a59 TM |
4962 | void |
4963 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4964 | { | |
4965 | put_stateid(cstate, &close->cl_stateid); | |
4966 | } | |
4967 | ||
4968 | void | |
4969 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4970 | { | |
4971 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4972 | } | |
4973 | ||
4974 | /* | |
4975 | * functions to consume current state id | |
4976 | */ | |
1e97b519 | 4977 | |
9428fe1a TM |
4978 | void |
4979 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4980 | { | |
4981 | get_stateid(cstate, &odp->od_stateid); | |
4982 | } | |
4983 | ||
4984 | void | |
4985 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4986 | { | |
4987 | get_stateid(cstate, &drp->dr_stateid); | |
4988 | } | |
4989 | ||
1e97b519 TM |
4990 | void |
4991 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4992 | { | |
4993 | get_stateid(cstate, &fsp->fr_stateid); | |
4994 | } | |
4995 | ||
4996 | void | |
4997 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4998 | { | |
4999 | get_stateid(cstate, &setattr->sa_stateid); | |
5000 | } | |
5001 | ||
8b70484c TM |
5002 | void |
5003 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5004 | { | |
5005 | get_stateid(cstate, &close->cl_stateid); | |
5006 | } | |
5007 | ||
5008 | void | |
62cd4a59 | 5009 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5010 | { |
62cd4a59 | 5011 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5012 | } |
30813e27 TM |
5013 | |
5014 | void | |
5015 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5016 | { | |
5017 | get_stateid(cstate, &read->rd_stateid); | |
5018 | } | |
5019 | ||
5020 | void | |
5021 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5022 | { | |
5023 | get_stateid(cstate, &write->wr_stateid); | |
5024 | } |