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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> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
9a74af21 | 44 | #include "xdr4.h" |
0a3adade | 45 | #include "vfs.h" |
bfa4b365 | 46 | #include "current_stateid.h" |
1da177e4 | 47 | |
5e1533c7 SK |
48 | #include "netns.h" |
49 | ||
1da177e4 LT |
50 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
51 | ||
f32f3c2d BF |
52 | #define all_ones {{~0,~0},~0} |
53 | static const stateid_t one_stateid = { | |
54 | .si_generation = ~0, | |
55 | .si_opaque = all_ones, | |
56 | }; | |
57 | static const stateid_t zero_stateid = { | |
58 | /* all fields zero */ | |
59 | }; | |
19ff0f28 TM |
60 | static const stateid_t currentstateid = { |
61 | .si_generation = 1, | |
62 | }; | |
f32f3c2d | 63 | |
ec6b5d7b | 64 | static u64 current_sessionid = 1; |
fd39ca9a | 65 | |
f32f3c2d BF |
66 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
67 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 68 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 69 | |
1da177e4 | 70 | /* forward declarations */ |
fe0750e5 | 71 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 72 | |
8b671b80 BF |
73 | /* Locking: */ |
74 | ||
75 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 76 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 77 | |
8b671b80 BF |
78 | /* |
79 | * Currently used for the del_recall_lru and file hash table. In an | |
80 | * effort to decrease the scope of the client_mutex, this spinlock may | |
81 | * eventually cover more: | |
82 | */ | |
83 | static DEFINE_SPINLOCK(recall_lock); | |
84 | ||
fe0750e5 BF |
85 | static struct kmem_cache *openowner_slab = NULL; |
86 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
87 | static struct kmem_cache *file_slab = NULL; |
88 | static struct kmem_cache *stateid_slab = NULL; | |
89 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 90 | |
1da177e4 LT |
91 | void |
92 | nfs4_lock_state(void) | |
93 | { | |
353ab6e9 | 94 | mutex_lock(&client_mutex); |
1da177e4 LT |
95 | } |
96 | ||
66b2b9b2 | 97 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 98 | |
66b2b9b2 BF |
99 | void nfsd4_put_session(struct nfsd4_session *ses) |
100 | { | |
101 | atomic_dec(&ses->se_ref); | |
102 | } | |
103 | ||
104 | static bool is_session_dead(struct nfsd4_session *ses) | |
508dc6e1 | 105 | { |
66b2b9b2 BF |
106 | return ses->se_flags & NFS4_SESSION_DEAD; |
107 | } | |
108 | ||
109 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses) | |
110 | { | |
111 | if (atomic_read(&ses->se_ref)) | |
112 | return nfserr_jukebox; | |
113 | ses->se_flags |= NFS4_SESSION_DEAD; | |
114 | return nfs_ok; | |
508dc6e1 BH |
115 | } |
116 | ||
66b2b9b2 | 117 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
508dc6e1 | 118 | { |
66b2b9b2 BF |
119 | if (is_session_dead(ses)) |
120 | return nfserr_badsession; | |
121 | atomic_inc(&ses->se_ref); | |
122 | return nfs_ok; | |
508dc6e1 BH |
123 | } |
124 | ||
1da177e4 LT |
125 | void |
126 | nfs4_unlock_state(void) | |
127 | { | |
353ab6e9 | 128 | mutex_unlock(&client_mutex); |
1da177e4 LT |
129 | } |
130 | ||
221a6876 BF |
131 | static bool is_client_expired(struct nfs4_client *clp) |
132 | { | |
133 | return clp->cl_time == 0; | |
134 | } | |
135 | ||
136 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
137 | { | |
138 | if (atomic_read(&clp->cl_refcount)) | |
139 | return nfserr_jukebox; | |
140 | clp->cl_time = 0; | |
141 | return nfs_ok; | |
142 | } | |
143 | ||
144 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
145 | { | |
146 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
147 | __be32 ret; | |
148 | ||
149 | spin_lock(&nn->client_lock); | |
150 | ret = mark_client_expired_locked(clp); | |
151 | spin_unlock(&nn->client_lock); | |
152 | return ret; | |
153 | } | |
154 | ||
155 | static __be32 get_client_locked(struct nfs4_client *clp) | |
156 | { | |
157 | if (is_client_expired(clp)) | |
158 | return nfserr_expired; | |
159 | atomic_inc(&clp->cl_refcount); | |
160 | return nfs_ok; | |
161 | } | |
162 | ||
163 | /* must be called under the client_lock */ | |
164 | static inline void | |
165 | renew_client_locked(struct nfs4_client *clp) | |
166 | { | |
167 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
168 | ||
169 | if (is_client_expired(clp)) { | |
170 | WARN_ON(1); | |
171 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
172 | __func__, | |
173 | clp->cl_clientid.cl_boot, | |
174 | clp->cl_clientid.cl_id); | |
175 | return; | |
176 | } | |
177 | ||
178 | dprintk("renewing client (clientid %08x/%08x)\n", | |
179 | clp->cl_clientid.cl_boot, | |
180 | clp->cl_clientid.cl_id); | |
181 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
182 | clp->cl_time = get_seconds(); | |
183 | } | |
184 | ||
185 | static inline void | |
186 | renew_client(struct nfs4_client *clp) | |
187 | { | |
188 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
189 | ||
190 | spin_lock(&nn->client_lock); | |
191 | renew_client_locked(clp); | |
192 | spin_unlock(&nn->client_lock); | |
193 | } | |
194 | ||
195 | void put_client_renew_locked(struct nfs4_client *clp) | |
196 | { | |
197 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
198 | return; | |
199 | if (!is_client_expired(clp)) | |
200 | renew_client_locked(clp); | |
201 | } | |
202 | ||
203 | void put_client_renew(struct nfs4_client *clp) | |
204 | { | |
205 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
206 | ||
207 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) | |
208 | return; | |
209 | if (!is_client_expired(clp)) | |
210 | renew_client_locked(clp); | |
211 | spin_unlock(&nn->client_lock); | |
212 | } | |
213 | ||
214 | ||
1da177e4 LT |
215 | static inline u32 |
216 | opaque_hashval(const void *ptr, int nbytes) | |
217 | { | |
218 | unsigned char *cptr = (unsigned char *) ptr; | |
219 | ||
220 | u32 x = 0; | |
221 | while (nbytes--) { | |
222 | x *= 37; | |
223 | x += *cptr++; | |
224 | } | |
225 | return x; | |
226 | } | |
227 | ||
32513b40 BF |
228 | static void nfsd4_free_file(struct nfs4_file *f) |
229 | { | |
230 | kmem_cache_free(file_slab, f); | |
231 | } | |
232 | ||
13cd2184 N |
233 | static inline void |
234 | put_nfs4_file(struct nfs4_file *fi) | |
235 | { | |
8b671b80 | 236 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
89876f8c | 237 | hlist_del(&fi->fi_hash); |
8b671b80 BF |
238 | spin_unlock(&recall_lock); |
239 | iput(fi->fi_inode); | |
32513b40 | 240 | nfsd4_free_file(fi); |
8b671b80 | 241 | } |
13cd2184 N |
242 | } |
243 | ||
244 | static inline void | |
245 | get_nfs4_file(struct nfs4_file *fi) | |
246 | { | |
8b671b80 | 247 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
248 | } |
249 | ||
ef0f3390 | 250 | static int num_delegations; |
697ce9be | 251 | unsigned long max_delegations; |
ef0f3390 N |
252 | |
253 | /* | |
254 | * Open owner state (share locks) | |
255 | */ | |
256 | ||
16bfdaaf BF |
257 | /* hash tables for lock and open owners */ |
258 | #define OWNER_HASH_BITS 8 | |
259 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
260 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 261 | |
16bfdaaf | 262 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
263 | { |
264 | unsigned int ret; | |
265 | ||
266 | ret = opaque_hashval(ownername->data, ownername->len); | |
267 | ret += clientid; | |
16bfdaaf | 268 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 269 | } |
ef0f3390 | 270 | |
ef0f3390 N |
271 | /* hash table for nfs4_file */ |
272 | #define FILE_HASH_BITS 8 | |
273 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 274 | |
ddc04c41 BF |
275 | static unsigned int file_hashval(struct inode *ino) |
276 | { | |
277 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
278 | return hash_ptr(ino, FILE_HASH_BITS); | |
279 | } | |
280 | ||
89876f8c | 281 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 282 | |
998db52c | 283 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 284 | { |
063b0fb9 | 285 | WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); |
f9d7562f BF |
286 | atomic_inc(&fp->fi_access[oflag]); |
287 | } | |
288 | ||
998db52c BF |
289 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
290 | { | |
291 | if (oflag == O_RDWR) { | |
292 | __nfs4_file_get_access(fp, O_RDONLY); | |
293 | __nfs4_file_get_access(fp, O_WRONLY); | |
294 | } else | |
295 | __nfs4_file_get_access(fp, oflag); | |
296 | } | |
297 | ||
298 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
299 | { |
300 | if (fp->fi_fds[oflag]) { | |
301 | fput(fp->fi_fds[oflag]); | |
302 | fp->fi_fds[oflag] = NULL; | |
303 | } | |
304 | } | |
305 | ||
998db52c | 306 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
307 | { |
308 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 309 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
310 | /* |
311 | * It's also safe to get rid of the RDWR open *if* | |
312 | * we no longer have need of the other kind of access | |
313 | * or if we already have the other kind of open: | |
314 | */ | |
315 | if (fp->fi_fds[1-oflag] | |
316 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
317 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
318 | } |
319 | } | |
320 | ||
998db52c BF |
321 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
322 | { | |
323 | if (oflag == O_RDWR) { | |
324 | __nfs4_file_put_access(fp, O_RDONLY); | |
325 | __nfs4_file_put_access(fp, O_WRONLY); | |
326 | } else | |
327 | __nfs4_file_put_access(fp, oflag); | |
328 | } | |
329 | ||
3abdb607 BF |
330 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
331 | kmem_cache *slab) | |
2a74aba7 | 332 | { |
3abdb607 BF |
333 | struct idr *stateids = &cl->cl_stateids; |
334 | static int min_stateid = 0; | |
335 | struct nfs4_stid *stid; | |
6136d2b4 | 336 | int new_id; |
2a74aba7 | 337 | |
3abdb607 BF |
338 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
339 | if (!stid) | |
340 | return NULL; | |
341 | ||
ebd6c707 TH |
342 | new_id = idr_alloc(stateids, stid, min_stateid, 0, GFP_KERNEL); |
343 | if (new_id < 0) | |
3abdb607 | 344 | goto out_free; |
2a74aba7 | 345 | stid->sc_client = cl; |
3abdb607 BF |
346 | stid->sc_type = 0; |
347 | stid->sc_stateid.si_opaque.so_id = new_id; | |
348 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 349 | /* Will be incremented before return to client: */ |
3abdb607 | 350 | stid->sc_stateid.si_generation = 0; |
996e0938 | 351 | |
996e0938 | 352 | /* |
3abdb607 BF |
353 | * It shouldn't be a problem to reuse an opaque stateid value. |
354 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
355 | * example, a stray write retransmission could be accepted by | |
356 | * the server when it should have been rejected. Therefore, | |
357 | * adopt a trick from the sctp code to attempt to maximize the | |
358 | * amount of time until an id is reused, by ensuring they always | |
359 | * "increase" (mod INT_MAX): | |
996e0938 | 360 | */ |
3abdb607 BF |
361 | |
362 | min_stateid = new_id+1; | |
363 | if (min_stateid == INT_MAX) | |
364 | min_stateid = 0; | |
365 | return stid; | |
366 | out_free: | |
367 | kfree(stid); | |
368 | return NULL; | |
2a74aba7 BF |
369 | } |
370 | ||
4cdc951b BF |
371 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
372 | { | |
373 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
374 | } | |
375 | ||
1da177e4 | 376 | static struct nfs4_delegation * |
dcef0413 | 377 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
378 | { |
379 | struct nfs4_delegation *dp; | |
380 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
381 | |
382 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
383 | /* |
384 | * Major work on the lease subsystem (for example, to support | |
385 | * calbacks on stat) will be required before we can support | |
386 | * write delegations properly. | |
387 | */ | |
388 | if (type != NFS4_OPEN_DELEGATE_READ) | |
389 | return NULL; | |
47f9940c MS |
390 | if (fp->fi_had_conflict) |
391 | return NULL; | |
c2f1a551 | 392 | if (num_delegations > max_delegations) |
ef0f3390 | 393 | return NULL; |
996e0938 | 394 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 395 | if (dp == NULL) |
1da177e4 | 396 | return dp; |
3abdb607 | 397 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
2a74aba7 BF |
398 | /* |
399 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
400 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
401 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
402 | */ |
403 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 404 | num_delegations++; |
ea1da636 N |
405 | INIT_LIST_HEAD(&dp->dl_perfile); |
406 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 407 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 408 | get_nfs4_file(fp); |
1da177e4 | 409 | dp->dl_file = fp; |
1da177e4 | 410 | dp->dl_type = type; |
6c02eaa1 | 411 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
412 | dp->dl_time = 0; |
413 | atomic_set(&dp->dl_count, 1); | |
57725155 | 414 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
415 | return dp; |
416 | } | |
417 | ||
68a33961 | 418 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
419 | { |
420 | struct idr *stateids = &s->sc_client->cl_stateids; | |
421 | ||
422 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
423 | } |
424 | ||
1da177e4 LT |
425 | void |
426 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
427 | { | |
428 | if (atomic_dec_and_test(&dp->dl_count)) { | |
68a33961 | 429 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 430 | num_delegations--; |
1da177e4 LT |
431 | } |
432 | } | |
433 | ||
acfdf5c3 | 434 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 435 | { |
acfdf5c3 BF |
436 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
437 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
438 | fp->fi_lease = NULL; | |
4ee63624 | 439 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
440 | fp->fi_deleg_file = NULL; |
441 | } | |
1da177e4 LT |
442 | } |
443 | ||
6136d2b4 BF |
444 | static void unhash_stid(struct nfs4_stid *s) |
445 | { | |
3abdb607 | 446 | s->sc_type = 0; |
6136d2b4 BF |
447 | } |
448 | ||
1da177e4 LT |
449 | /* Called under the state lock. */ |
450 | static void | |
451 | unhash_delegation(struct nfs4_delegation *dp) | |
452 | { | |
6136d2b4 | 453 | unhash_stid(&dp->dl_stid); |
ea1da636 | 454 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 455 | spin_lock(&recall_lock); |
5d926e8c | 456 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
457 | list_del_init(&dp->dl_recall_lru); |
458 | spin_unlock(&recall_lock); | |
acfdf5c3 | 459 | nfs4_put_deleg_lease(dp->dl_file); |
68a33961 BF |
460 | put_nfs4_file(dp->dl_file); |
461 | dp->dl_file = NULL; | |
462 | remove_stid(&dp->dl_stid); | |
1da177e4 LT |
463 | nfs4_put_delegation(dp); |
464 | } | |
465 | ||
466 | /* | |
467 | * SETCLIENTID state | |
468 | */ | |
469 | ||
ddc04c41 BF |
470 | static unsigned int clientid_hashval(u32 id) |
471 | { | |
472 | return id & CLIENT_HASH_MASK; | |
473 | } | |
474 | ||
475 | static unsigned int clientstr_hashval(const char *name) | |
476 | { | |
477 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
478 | } | |
479 | ||
f9d7562f BF |
480 | /* |
481 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
482 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
483 | * only what share bits are currently in force, but also what | |
484 | * combinations of share bits previous opens have used. This allows us | |
485 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
486 | * return an error if the client attempt to downgrade to a combination | |
487 | * of share bits not explicable by closing some of its previous opens. | |
488 | * | |
489 | * XXX: This enforcement is actually incomplete, since we don't keep | |
490 | * track of access/deny bit combinations; so, e.g., we allow: | |
491 | * | |
492 | * OPEN allow read, deny write | |
493 | * OPEN allow both, deny none | |
494 | * DOWNGRADE allow read, deny none | |
495 | * | |
496 | * which we should reject. | |
497 | */ | |
5ae037e5 JL |
498 | static unsigned int |
499 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 500 | int i; |
5ae037e5 | 501 | unsigned int access = 0; |
f9d7562f | 502 | |
f9d7562f BF |
503 | for (i = 1; i < 4; i++) { |
504 | if (test_bit(i, &bmap)) | |
5ae037e5 | 505 | access |= i; |
f9d7562f | 506 | } |
5ae037e5 | 507 | return access; |
f9d7562f BF |
508 | } |
509 | ||
3a328614 | 510 | static bool |
dcef0413 | 511 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
512 | unsigned int access, deny; |
513 | ||
5ae037e5 JL |
514 | access = bmap_to_share_mode(stp->st_access_bmap); |
515 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 516 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
517 | return false; |
518 | return true; | |
f9d7562f BF |
519 | } |
520 | ||
82c5ff1b JL |
521 | /* set share access for a given stateid */ |
522 | static inline void | |
523 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
524 | { | |
525 | __set_bit(access, &stp->st_access_bmap); | |
526 | } | |
527 | ||
528 | /* clear share access for a given stateid */ | |
529 | static inline void | |
530 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
531 | { | |
532 | __clear_bit(access, &stp->st_access_bmap); | |
533 | } | |
534 | ||
535 | /* test whether a given stateid has access */ | |
536 | static inline bool | |
537 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
538 | { | |
539 | return test_bit(access, &stp->st_access_bmap); | |
540 | } | |
541 | ||
ce0fc43c JL |
542 | /* set share deny for a given stateid */ |
543 | static inline void | |
544 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
545 | { | |
546 | __set_bit(access, &stp->st_deny_bmap); | |
547 | } | |
548 | ||
549 | /* clear share deny for a given stateid */ | |
550 | static inline void | |
551 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
552 | { | |
553 | __clear_bit(access, &stp->st_deny_bmap); | |
554 | } | |
555 | ||
556 | /* test whether a given stateid is denying specific access */ | |
557 | static inline bool | |
558 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
559 | { | |
560 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
561 | } |
562 | ||
563 | static int nfs4_access_to_omode(u32 access) | |
564 | { | |
8f34a430 | 565 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
566 | case NFS4_SHARE_ACCESS_READ: |
567 | return O_RDONLY; | |
568 | case NFS4_SHARE_ACCESS_WRITE: | |
569 | return O_WRONLY; | |
570 | case NFS4_SHARE_ACCESS_BOTH: | |
571 | return O_RDWR; | |
572 | } | |
063b0fb9 BF |
573 | WARN_ON_ONCE(1); |
574 | return O_RDONLY; | |
f9d7562f BF |
575 | } |
576 | ||
82c5ff1b JL |
577 | /* release all access and file references for a given stateid */ |
578 | static void | |
579 | release_all_access(struct nfs4_ol_stateid *stp) | |
580 | { | |
581 | int i; | |
582 | ||
583 | for (i = 1; i < 4; i++) { | |
584 | if (test_access(i, stp)) | |
585 | nfs4_file_put_access(stp->st_file, | |
586 | nfs4_access_to_omode(i)); | |
587 | clear_access(i, stp); | |
588 | } | |
589 | } | |
590 | ||
dcef0413 | 591 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 592 | { |
529d7b2a BF |
593 | list_del(&stp->st_perfile); |
594 | list_del(&stp->st_perstateowner); | |
595 | } | |
596 | ||
dcef0413 | 597 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 598 | { |
82c5ff1b | 599 | release_all_access(stp); |
a96e5b90 | 600 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
601 | stp->st_file = NULL; |
602 | } | |
603 | ||
dcef0413 | 604 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 605 | { |
68a33961 BF |
606 | remove_stid(&stp->st_stid); |
607 | kmem_cache_free(stateid_slab, stp); | |
529d7b2a BF |
608 | } |
609 | ||
dcef0413 | 610 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
611 | { |
612 | struct file *file; | |
613 | ||
614 | unhash_generic_stateid(stp); | |
6136d2b4 | 615 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
616 | file = find_any_file(stp->st_file); |
617 | if (file) | |
fe0750e5 | 618 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 619 | close_generic_stateid(stp); |
529d7b2a BF |
620 | free_generic_stateid(stp); |
621 | } | |
622 | ||
fe0750e5 | 623 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 624 | { |
dcef0413 | 625 | struct nfs4_ol_stateid *stp; |
529d7b2a | 626 | |
fe0750e5 BF |
627 | list_del(&lo->lo_owner.so_strhash); |
628 | list_del(&lo->lo_perstateid); | |
009673b4 | 629 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
630 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
631 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 632 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
633 | release_lock_stateid(stp); |
634 | } | |
635 | } | |
636 | ||
fe0750e5 | 637 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 638 | { |
fe0750e5 BF |
639 | unhash_lockowner(lo); |
640 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
641 | } |
642 | ||
643 | static void | |
dcef0413 | 644 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 645 | { |
fe0750e5 | 646 | struct nfs4_lockowner *lo; |
529d7b2a BF |
647 | |
648 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
649 | lo = list_entry(open_stp->st_lockowners.next, |
650 | struct nfs4_lockowner, lo_perstateid); | |
651 | release_lockowner(lo); | |
529d7b2a BF |
652 | } |
653 | } | |
654 | ||
38c387b5 | 655 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
656 | { |
657 | unhash_generic_stateid(stp); | |
658 | release_stateid_lockowners(stp); | |
38c387b5 BF |
659 | close_generic_stateid(stp); |
660 | } | |
661 | ||
662 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
663 | { | |
664 | unhash_open_stateid(stp); | |
6136d2b4 | 665 | unhash_stid(&stp->st_stid); |
2283963f BF |
666 | free_generic_stateid(stp); |
667 | } | |
668 | ||
fe0750e5 | 669 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 670 | { |
dcef0413 | 671 | struct nfs4_ol_stateid *stp; |
f1d110ca | 672 | |
fe0750e5 BF |
673 | list_del(&oo->oo_owner.so_strhash); |
674 | list_del(&oo->oo_perclient); | |
675 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
676 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 677 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 678 | release_open_stateid(stp); |
f1d110ca BF |
679 | } |
680 | } | |
681 | ||
f7a4d872 BF |
682 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
683 | { | |
684 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
685 | ||
686 | if (s) { | |
6136d2b4 | 687 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
688 | free_generic_stateid(s); |
689 | oo->oo_last_closed_stid = NULL; | |
690 | } | |
691 | } | |
692 | ||
fe0750e5 | 693 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 694 | { |
fe0750e5 BF |
695 | unhash_openowner(oo); |
696 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 697 | release_last_closed_stateid(oo); |
fe0750e5 | 698 | nfs4_free_openowner(oo); |
f1d110ca BF |
699 | } |
700 | ||
5282fd72 ME |
701 | static inline int |
702 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
703 | { | |
704 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
705 | ||
706 | return sid->sequence % SESSION_HASH_SIZE; | |
707 | } | |
708 | ||
8f199b82 | 709 | #ifdef NFSD_DEBUG |
5282fd72 ME |
710 | static inline void |
711 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
712 | { | |
713 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
714 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
715 | } | |
8f199b82 TM |
716 | #else |
717 | static inline void | |
718 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
719 | { | |
720 | } | |
721 | #endif | |
722 | ||
5282fd72 | 723 | |
ec6b5d7b AA |
724 | static void |
725 | gen_sessionid(struct nfsd4_session *ses) | |
726 | { | |
727 | struct nfs4_client *clp = ses->se_client; | |
728 | struct nfsd4_sessionid *sid; | |
729 | ||
730 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
731 | sid->clientid = clp->cl_clientid; | |
732 | sid->sequence = current_sessionid++; | |
733 | sid->reserved = 0; | |
734 | } | |
735 | ||
736 | /* | |
a649637c AA |
737 | * The protocol defines ca_maxresponssize_cached to include the size of |
738 | * the rpc header, but all we need to cache is the data starting after | |
739 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
740 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
741 | * value that is the number of bytes in our cache plus a few additional | |
742 | * bytes. In order to stay on the safe side, and not promise more than | |
743 | * we can cache, those additional bytes must be the minimum possible: 24 | |
744 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
745 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
746 | * for the SEQUENCE op response: | |
747 | */ | |
748 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
749 | ||
557ce264 AA |
750 | static void |
751 | free_session_slots(struct nfsd4_session *ses) | |
752 | { | |
753 | int i; | |
754 | ||
755 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
756 | kfree(ses->se_slots[i]); | |
757 | } | |
758 | ||
a649637c | 759 | /* |
efe0cb6d BF |
760 | * We don't actually need to cache the rpc and session headers, so we |
761 | * can allocate a little less for each slot: | |
762 | */ | |
763 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
764 | { | |
765 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
766 | } | |
767 | ||
5b6feee9 | 768 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 769 | { |
5b6feee9 BF |
770 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
771 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 772 | |
5b6feee9 BF |
773 | return size; |
774 | } | |
ec6b5d7b | 775 | |
5b6feee9 BF |
776 | /* |
777 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 778 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 779 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 780 | */ |
5b6feee9 | 781 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 782 | { |
5b6feee9 | 783 | int avail; |
ec6b5d7b | 784 | |
5b6feee9 | 785 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 786 | |
5b6feee9 | 787 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
788 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
789 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
790 | num = min_t(int, num, avail / slotsize); |
791 | nfsd_drc_mem_used += num * slotsize; | |
792 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 793 | |
5b6feee9 BF |
794 | return num; |
795 | } | |
ec6b5d7b | 796 | |
5b6feee9 BF |
797 | static void nfsd4_put_drc_mem(int slotsize, int num) |
798 | { | |
4bd9b0f4 | 799 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 800 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 801 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 802 | } |
ec6b5d7b | 803 | |
a827bcb2 | 804 | static struct nfsd4_session *__alloc_session(int slotsize, int numslots) |
5b6feee9 BF |
805 | { |
806 | struct nfsd4_session *new; | |
807 | int mem, i; | |
a649637c | 808 | |
5b6feee9 BF |
809 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
810 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
811 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 812 | |
5b6feee9 BF |
813 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
814 | if (!new) | |
815 | return NULL; | |
557ce264 | 816 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
817 | for (i = 0; i < numslots; i++) { |
818 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
819 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
820 | if (!new->se_slots[i]) | |
557ce264 | 821 | goto out_free; |
557ce264 | 822 | } |
5b6feee9 BF |
823 | return new; |
824 | out_free: | |
825 | while (i--) | |
826 | kfree(new->se_slots[i]); | |
827 | kfree(new); | |
828 | return NULL; | |
ec6b5d7b AA |
829 | } |
830 | ||
9dd9845f SK |
831 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, |
832 | struct nfsd4_channel_attrs *req, | |
833 | int numslots, int slotsize, | |
834 | struct nfsd_net *nn) | |
ec6b5d7b | 835 | { |
9dd9845f | 836 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
ec6b5d7b | 837 | |
5b6feee9 | 838 | new->maxreqs = numslots; |
d2b21743 MJ |
839 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
840 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
841 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
842 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
843 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
844 | } | |
ec6b5d7b | 845 | |
19cf5c02 BF |
846 | static void free_conn(struct nfsd4_conn *c) |
847 | { | |
848 | svc_xprt_put(c->cn_xprt); | |
849 | kfree(c); | |
850 | } | |
ec6b5d7b | 851 | |
19cf5c02 BF |
852 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
853 | { | |
854 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
855 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 856 | |
19cf5c02 BF |
857 | spin_lock(&clp->cl_lock); |
858 | if (!list_empty(&c->cn_persession)) { | |
859 | list_del(&c->cn_persession); | |
860 | free_conn(c); | |
861 | } | |
eea49806 | 862 | nfsd4_probe_callback(clp); |
2e4b7239 | 863 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 864 | } |
ec6b5d7b | 865 | |
d29c374c | 866 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 867 | { |
c7662518 | 868 | struct nfsd4_conn *conn; |
ec6b5d7b | 869 | |
c7662518 BF |
870 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
871 | if (!conn) | |
db90681d | 872 | return NULL; |
c7662518 BF |
873 | svc_xprt_get(rqstp->rq_xprt); |
874 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 875 | conn->cn_flags = flags; |
db90681d BF |
876 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
877 | return conn; | |
878 | } | |
a649637c | 879 | |
328ead28 BF |
880 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
881 | { | |
882 | conn->cn_session = ses; | |
883 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
884 | } |
885 | ||
db90681d | 886 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 887 | { |
db90681d | 888 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 889 | |
c7662518 | 890 | spin_lock(&clp->cl_lock); |
328ead28 | 891 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 892 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
893 | } |
894 | ||
21b75b01 | 895 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 896 | { |
19cf5c02 | 897 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 898 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
899 | } |
900 | ||
e1ff371f | 901 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 902 | { |
21b75b01 | 903 | int ret; |
ec6b5d7b | 904 | |
db90681d | 905 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
906 | ret = nfsd4_register_conn(conn); |
907 | if (ret) | |
908 | /* oops; xprt is already down: */ | |
909 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 910 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
911 | /* callback channel may be back up */ |
912 | nfsd4_probe_callback(ses->se_client); | |
913 | } | |
c7662518 | 914 | } |
ec6b5d7b | 915 | |
e1ff371f | 916 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
917 | { |
918 | u32 dir = NFS4_CDFC4_FORE; | |
919 | ||
e1ff371f | 920 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 921 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 922 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
923 | } |
924 | ||
925 | /* must be called under client_lock */ | |
19cf5c02 | 926 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 927 | { |
19cf5c02 BF |
928 | struct nfs4_client *clp = s->se_client; |
929 | struct nfsd4_conn *c; | |
ec6b5d7b | 930 | |
19cf5c02 BF |
931 | spin_lock(&clp->cl_lock); |
932 | while (!list_empty(&s->se_conns)) { | |
933 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
934 | list_del_init(&c->cn_persession); | |
935 | spin_unlock(&clp->cl_lock); | |
557ce264 | 936 | |
19cf5c02 BF |
937 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
938 | free_conn(c); | |
ec6b5d7b | 939 | |
19cf5c02 BF |
940 | spin_lock(&clp->cl_lock); |
941 | } | |
942 | spin_unlock(&clp->cl_lock); | |
c7662518 | 943 | } |
ec6b5d7b | 944 | |
1377b69e BF |
945 | static void __free_session(struct nfsd4_session *ses) |
946 | { | |
947 | nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); | |
948 | free_session_slots(ses); | |
949 | kfree(ses); | |
950 | } | |
951 | ||
66b2b9b2 | 952 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 953 | { |
66b2b9b2 | 954 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
955 | |
956 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 957 | nfsd4_del_conns(ses); |
1377b69e | 958 | __free_session(ses); |
c7662518 BF |
959 | } |
960 | ||
9dd9845f SK |
961 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan, |
962 | struct nfsd_net *nn) | |
5b6feee9 BF |
963 | { |
964 | struct nfsd4_session *new; | |
5b6feee9 | 965 | int numslots, slotsize; |
5b6feee9 BF |
966 | /* |
967 | * Note decreasing slot size below client's request may | |
968 | * make it difficult for client to function correctly, whereas | |
969 | * decreasing the number of slots will (just?) affect | |
970 | * performance. When short on memory we therefore prefer to | |
971 | * decrease number of slots instead of their size. | |
972 | */ | |
973 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
974 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
975 | if (numslots < 1) |
976 | return NULL; | |
5b6feee9 | 977 | |
a827bcb2 | 978 | new = __alloc_session(slotsize, numslots); |
5b6feee9 | 979 | if (!new) { |
74b70dde | 980 | nfsd4_put_drc_mem(slotsize, numslots); |
ac7c46f2 | 981 | return NULL; |
557ce264 | 982 | } |
9dd9845f | 983 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize, nn); |
a827bcb2 BF |
984 | return new; |
985 | } | |
557ce264 | 986 | |
135ae827 | 987 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 988 | { |
a827bcb2 | 989 | int idx; |
1872de0e | 990 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 991 | |
ec6b5d7b AA |
992 | new->se_client = clp; |
993 | gen_sessionid(new); | |
ec6b5d7b | 994 | |
c7662518 BF |
995 | INIT_LIST_HEAD(&new->se_conns); |
996 | ||
ac7c46f2 | 997 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 998 | new->se_flags = cses->flags; |
8b5ce5cd | 999 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1000 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1001 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1002 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1003 | spin_lock(&nn->client_lock); |
1872de0e | 1004 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1005 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1006 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1007 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1008 | spin_unlock(&nn->client_lock); |
ec6b5d7b | 1009 | |
dcbeaa68 | 1010 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1011 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1012 | /* |
1013 | * This is a little silly; with sessions there's no real | |
1014 | * use for the callback address. Use the peer address | |
1015 | * as a reasonable default for now, but consider fixing | |
1016 | * the rpc client not to require an address in the | |
1017 | * future: | |
1018 | */ | |
edd76786 BF |
1019 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1020 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1021 | } |
ec6b5d7b AA |
1022 | } |
1023 | ||
9089f1b4 | 1024 | /* caller must hold client_lock */ |
5282fd72 | 1025 | static struct nfsd4_session * |
1872de0e | 1026 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1027 | { |
1028 | struct nfsd4_session *elem; | |
1029 | int idx; | |
1872de0e | 1030 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1031 | |
1032 | dump_sessionid(__func__, sessionid); | |
1033 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1034 | /* Search in the appropriate list */ |
1872de0e | 1035 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1036 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1037 | NFS4_MAX_SESSIONID_LEN)) { | |
1038 | return elem; | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | dprintk("%s: session not found\n", __func__); | |
1043 | return NULL; | |
1044 | } | |
1045 | ||
9089f1b4 | 1046 | /* caller must hold client_lock */ |
7116ed6b | 1047 | static void |
5282fd72 | 1048 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1049 | { |
1050 | list_del(&ses->se_hash); | |
4c649378 | 1051 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1052 | list_del(&ses->se_perclnt); |
4c649378 | 1053 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1054 | } |
1055 | ||
1da177e4 LT |
1056 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1057 | static int | |
2c142baa | 1058 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1059 | { |
2c142baa | 1060 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1061 | return 0; |
60adfc50 | 1062 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1063 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1064 | return 1; |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * XXX Should we use a slab cache ? | |
1069 | * This type of memory management is somewhat inefficient, but we use it | |
1070 | * anyway since SETCLIENTID is not a common operation. | |
1071 | */ | |
35bba9a3 | 1072 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1073 | { |
1074 | struct nfs4_client *clp; | |
1075 | ||
35bba9a3 BF |
1076 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1077 | if (clp == NULL) | |
1078 | return NULL; | |
67114fe6 | 1079 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1080 | if (clp->cl_name.data == NULL) { |
1081 | kfree(clp); | |
1082 | return NULL; | |
1da177e4 | 1083 | } |
35bba9a3 | 1084 | clp->cl_name.len = name.len; |
1da177e4 LT |
1085 | return clp; |
1086 | } | |
1087 | ||
1088 | static inline void | |
1089 | free_client(struct nfs4_client *clp) | |
1090 | { | |
bca0ec65 | 1091 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1092 | |
1093 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1094 | while (!list_empty(&clp->cl_sessions)) { |
1095 | struct nfsd4_session *ses; | |
1096 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1097 | se_perclnt); | |
1098 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1099 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1100 | free_session(ses); | |
792c95dd | 1101 | } |
03a4e1f6 | 1102 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1103 | kfree(clp->cl_name.data); |
2d32b29a | 1104 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1105 | kfree(clp); |
1106 | } | |
1107 | ||
84d38ac9 BH |
1108 | /* must be called under the client_lock */ |
1109 | static inline void | |
1110 | unhash_client_locked(struct nfs4_client *clp) | |
1111 | { | |
792c95dd BF |
1112 | struct nfsd4_session *ses; |
1113 | ||
84d38ac9 | 1114 | list_del(&clp->cl_lru); |
4c649378 | 1115 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1116 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1117 | list_del_init(&ses->se_hash); | |
4c649378 | 1118 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1119 | } |
1120 | ||
1da177e4 | 1121 | static void |
0d22f68f | 1122 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1123 | { |
fe0750e5 | 1124 | struct nfs4_openowner *oo; |
1da177e4 | 1125 | struct nfs4_delegation *dp; |
1da177e4 | 1126 | struct list_head reaplist; |
382a62e7 | 1127 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1128 | |
1da177e4 LT |
1129 | INIT_LIST_HEAD(&reaplist); |
1130 | spin_lock(&recall_lock); | |
ea1da636 N |
1131 | while (!list_empty(&clp->cl_delegations)) { |
1132 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1133 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1134 | list_move(&dp->dl_recall_lru, &reaplist); |
1135 | } | |
1136 | spin_unlock(&recall_lock); | |
1137 | while (!list_empty(&reaplist)) { | |
1138 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1139 | unhash_delegation(dp); |
1140 | } | |
ea1da636 | 1141 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1142 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1143 | release_openowner(oo); | |
1da177e4 | 1144 | } |
6ff8da08 | 1145 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1146 | if (clp->cl_cb_conn.cb_xprt) |
1147 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1148 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1149 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1150 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1151 | else |
a99454aa | 1152 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1153 | spin_lock(&nn->client_lock); |
84d38ac9 | 1154 | unhash_client_locked(clp); |
221a6876 BF |
1155 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1156 | free_client(clp); | |
c9a49628 | 1157 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1158 | } |
1159 | ||
0d22f68f BF |
1160 | static void expire_client(struct nfs4_client *clp) |
1161 | { | |
1162 | nfsd4_client_record_remove(clp); | |
1163 | destroy_client(clp); | |
1164 | } | |
1165 | ||
35bba9a3 BF |
1166 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1167 | { | |
1168 | memcpy(target->cl_verifier.data, source->data, | |
1169 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1170 | } |
1171 | ||
35bba9a3 BF |
1172 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1173 | { | |
1da177e4 LT |
1174 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1175 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1176 | } | |
1177 | ||
03a4e1f6 | 1178 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1179 | { |
03a4e1f6 BF |
1180 | if (source->cr_principal) { |
1181 | target->cr_principal = | |
1182 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1183 | if (target->cr_principal == NULL) | |
1184 | return -ENOMEM; | |
1185 | } else | |
1186 | target->cr_principal = NULL; | |
d5497fc6 | 1187 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1188 | target->cr_uid = source->cr_uid; |
1189 | target->cr_gid = source->cr_gid; | |
1190 | target->cr_group_info = source->cr_group_info; | |
1191 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1192 | return 0; |
1da177e4 LT |
1193 | } |
1194 | ||
ac55fdc4 JL |
1195 | static long long |
1196 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1197 | { | |
1198 | long long res; | |
1199 | ||
1200 | res = o1->len - o2->len; | |
1201 | if (res) | |
1202 | return res; | |
1203 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1204 | } | |
1205 | ||
35bba9a3 | 1206 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1207 | { |
a55370a3 | 1208 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1209 | } |
1210 | ||
1211 | static int | |
599e0a22 BF |
1212 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1213 | { | |
1214 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1215 | } |
1216 | ||
1217 | static int | |
599e0a22 BF |
1218 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1219 | { | |
1220 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1221 | } |
1222 | ||
8fbba96e BF |
1223 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1224 | { | |
1225 | int i; | |
1226 | ||
1227 | if (g1->ngroups != g2->ngroups) | |
1228 | return false; | |
1229 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1230 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1231 | return false; |
1232 | return true; | |
1233 | } | |
1234 | ||
68eb3508 BF |
1235 | /* |
1236 | * RFC 3530 language requires clid_inuse be returned when the | |
1237 | * "principal" associated with a requests differs from that previously | |
1238 | * used. We use uid, gid's, and gss principal string as our best | |
1239 | * approximation. We also don't want to allow non-gss use of a client | |
1240 | * established using gss: in theory cr_principal should catch that | |
1241 | * change, but in practice cr_principal can be null even in the gss case | |
1242 | * since gssd doesn't always pass down a principal string. | |
1243 | */ | |
1244 | static bool is_gss_cred(struct svc_cred *cr) | |
1245 | { | |
1246 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1247 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1248 | } | |
1249 | ||
1250 | ||
5559b50a | 1251 | static bool |
599e0a22 BF |
1252 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1253 | { | |
68eb3508 | 1254 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1255 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1256 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1257 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1258 | return false; | |
1259 | if (cr1->cr_principal == cr2->cr_principal) | |
1260 | return true; | |
1261 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1262 | return false; | |
5559b50a | 1263 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1264 | } |
1265 | ||
c212cecf | 1266 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1267 | { |
1268 | static u32 current_clientid = 1; | |
1269 | ||
2c142baa | 1270 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1271 | clp->cl_clientid.cl_id = current_clientid++; |
1272 | } | |
1273 | ||
deda2faa BF |
1274 | static void gen_confirm(struct nfs4_client *clp) |
1275 | { | |
ab4684d1 | 1276 | __be32 verf[2]; |
deda2faa | 1277 | static u32 i; |
1da177e4 | 1278 | |
ab4684d1 CL |
1279 | verf[0] = (__be32)get_seconds(); |
1280 | verf[1] = (__be32)i++; | |
1281 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1282 | } |
1283 | ||
38c2f4b1 | 1284 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1285 | { |
3abdb607 BF |
1286 | struct nfs4_stid *ret; |
1287 | ||
1288 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1289 | if (!ret || !ret->sc_type) | |
1290 | return NULL; | |
1291 | return ret; | |
4d71ab87 BF |
1292 | } |
1293 | ||
38c2f4b1 | 1294 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1295 | { |
1296 | struct nfs4_stid *s; | |
4d71ab87 | 1297 | |
38c2f4b1 | 1298 | s = find_stateid(cl, t); |
4d71ab87 BF |
1299 | if (!s) |
1300 | return NULL; | |
f459e453 | 1301 | if (typemask & s->sc_type) |
4581d140 | 1302 | return s; |
4581d140 BF |
1303 | return NULL; |
1304 | } | |
1305 | ||
2216d449 | 1306 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1307 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1308 | { | |
1309 | struct nfs4_client *clp; | |
1310 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1311 | int ret; |
c212cecf | 1312 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1313 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1314 | |
1315 | clp = alloc_client(name); | |
1316 | if (clp == NULL) | |
1317 | return NULL; | |
1318 | ||
792c95dd | 1319 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1320 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1321 | if (ret) { | |
c9a49628 | 1322 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1323 | free_client(clp); |
c9a49628 | 1324 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1325 | return NULL; |
b09333c4 | 1326 | } |
38c2f4b1 | 1327 | idr_init(&clp->cl_stateids); |
46583e25 | 1328 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1329 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1330 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1331 | INIT_LIST_HEAD(&clp->cl_openowners); |
1332 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1333 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1334 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1335 | spin_lock_init(&clp->cl_lock); |
57725155 | 1336 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1337 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1338 | clear_bit(0, &clp->cl_cb_slot_busy); |
1339 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1340 | copy_verf(clp, verf); | |
1341 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1342 | gen_confirm(clp); |
edd76786 | 1343 | clp->cl_cb_session = NULL; |
c212cecf | 1344 | clp->net = net; |
b09333c4 RL |
1345 | return clp; |
1346 | } | |
1347 | ||
fd39ca9a | 1348 | static void |
ac55fdc4 JL |
1349 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1350 | { | |
1351 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1352 | struct nfs4_client *clp; | |
1353 | ||
1354 | while (*new) { | |
1355 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1356 | parent = *new; | |
1357 | ||
1358 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1359 | new = &((*new)->rb_left); | |
1360 | else | |
1361 | new = &((*new)->rb_right); | |
1362 | } | |
1363 | ||
1364 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1365 | rb_insert_color(&new_clp->cl_namenode, root); | |
1366 | } | |
1367 | ||
1368 | static struct nfs4_client * | |
1369 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1370 | { | |
1371 | long long cmp; | |
1372 | struct rb_node *node = root->rb_node; | |
1373 | struct nfs4_client *clp; | |
1374 | ||
1375 | while (node) { | |
1376 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1377 | cmp = compare_blob(&clp->cl_name, name); | |
1378 | if (cmp > 0) | |
1379 | node = node->rb_left; | |
1380 | else if (cmp < 0) | |
1381 | node = node->rb_right; | |
1382 | else | |
1383 | return clp; | |
1384 | } | |
1385 | return NULL; | |
1386 | } | |
1387 | ||
1388 | static void | |
1389 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1390 | { |
1391 | unsigned int idhashval; | |
0a7ec377 | 1392 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1393 | |
ac55fdc4 | 1394 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1395 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1396 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1397 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1398 | renew_client(clp); |
1da177e4 LT |
1399 | } |
1400 | ||
fd39ca9a | 1401 | static void |
1da177e4 LT |
1402 | move_to_confirmed(struct nfs4_client *clp) |
1403 | { | |
1404 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1405 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1406 | |
1407 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1408 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1409 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1410 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1411 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1412 | renew_client(clp); |
1413 | } | |
1414 | ||
1415 | static struct nfs4_client * | |
bfa85e83 | 1416 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1417 | { |
1418 | struct nfs4_client *clp; | |
1419 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1420 | ||
bfa85e83 | 1421 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1422 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1423 | if ((bool)clp->cl_minorversion != sessions) |
1424 | return NULL; | |
a50d2ad1 | 1425 | renew_client(clp); |
1da177e4 | 1426 | return clp; |
a50d2ad1 | 1427 | } |
1da177e4 LT |
1428 | } |
1429 | return NULL; | |
1430 | } | |
1431 | ||
bfa85e83 BF |
1432 | static struct nfs4_client * |
1433 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1434 | { | |
1435 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1436 | ||
1437 | return find_client_in_id_table(tbl, clid, sessions); | |
1438 | } | |
1439 | ||
1da177e4 | 1440 | static struct nfs4_client * |
0a7ec377 | 1441 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1442 | { |
bfa85e83 | 1443 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1444 | |
bfa85e83 | 1445 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1446 | } |
1447 | ||
6e5f15c9 | 1448 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1449 | { |
6e5f15c9 | 1450 | return clp->cl_exchange_flags != 0; |
e203d506 | 1451 | } |
a1bcecd2 | 1452 | |
28ce6054 | 1453 | static struct nfs4_client * |
382a62e7 | 1454 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1455 | { |
382a62e7 | 1456 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1457 | } |
1458 | ||
1459 | static struct nfs4_client * | |
a99454aa | 1460 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1461 | { |
a99454aa | 1462 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1463 | } |
1464 | ||
fd39ca9a | 1465 | static void |
6f3d772f | 1466 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1467 | { |
07263f1e | 1468 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1469 | struct sockaddr *sa = svc_addr(rqstp); |
1470 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1471 | unsigned short expected_family; |
1472 | ||
1473 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1474 | if (se->se_callback_netid_len == 3 && | |
1475 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1476 | expected_family = AF_INET; | |
1477 | else if (se->se_callback_netid_len == 4 && | |
1478 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1479 | expected_family = AF_INET6; | |
1480 | else | |
1da177e4 LT |
1481 | goto out_err; |
1482 | ||
c212cecf | 1483 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1484 | se->se_callback_addr_len, |
07263f1e BF |
1485 | (struct sockaddr *)&conn->cb_addr, |
1486 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1487 | |
07263f1e | 1488 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1489 | goto out_err; |
aa9a4ec7 | 1490 | |
07263f1e BF |
1491 | if (conn->cb_addr.ss_family == AF_INET6) |
1492 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1493 | |
07263f1e BF |
1494 | conn->cb_prog = se->se_callback_prog; |
1495 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1496 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1497 | return; |
1498 | out_err: | |
07263f1e BF |
1499 | conn->cb_addr.ss_family = AF_UNSPEC; |
1500 | conn->cb_addrlen = 0; | |
849823c5 | 1501 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1502 | "will not receive delegations\n", |
1503 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1504 | ||
1da177e4 LT |
1505 | return; |
1506 | } | |
1507 | ||
074fe897 | 1508 | /* |
557ce264 | 1509 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1510 | */ |
074fe897 AA |
1511 | void |
1512 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1513 | { |
557ce264 AA |
1514 | struct nfsd4_slot *slot = resp->cstate.slot; |
1515 | unsigned int base; | |
074fe897 | 1516 | |
557ce264 | 1517 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1518 | |
557ce264 AA |
1519 | slot->sl_opcnt = resp->opcnt; |
1520 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1521 | |
bf5c43c8 | 1522 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1523 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1524 | slot->sl_datalen = 0; |
bf864a31 | 1525 | return; |
074fe897 | 1526 | } |
557ce264 AA |
1527 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1528 | base = (char *)resp->cstate.datap - | |
1529 | (char *)resp->xbuf->head[0].iov_base; | |
1530 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1531 | slot->sl_datalen)) | |
1532 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1533 | return; | |
074fe897 AA |
1534 | } |
1535 | ||
1536 | /* | |
abfabf8c AA |
1537 | * Encode the replay sequence operation from the slot values. |
1538 | * If cachethis is FALSE encode the uncached rep error on the next | |
1539 | * operation which sets resp->p and increments resp->opcnt for | |
1540 | * nfs4svc_encode_compoundres. | |
074fe897 | 1541 | * |
074fe897 | 1542 | */ |
abfabf8c AA |
1543 | static __be32 |
1544 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1545 | struct nfsd4_compoundres *resp) | |
074fe897 | 1546 | { |
abfabf8c AA |
1547 | struct nfsd4_op *op; |
1548 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1549 | |
abfabf8c AA |
1550 | /* Encode the replayed sequence operation */ |
1551 | op = &args->ops[resp->opcnt - 1]; | |
1552 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1553 | |
abfabf8c | 1554 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1555 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1556 | op = &args->ops[resp->opcnt++]; |
1557 | op->status = nfserr_retry_uncached_rep; | |
1558 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1559 | } |
abfabf8c | 1560 | return op->status; |
074fe897 AA |
1561 | } |
1562 | ||
1563 | /* | |
557ce264 AA |
1564 | * The sequence operation is not cached because we can use the slot and |
1565 | * session values. | |
074fe897 AA |
1566 | */ |
1567 | __be32 | |
bf864a31 AA |
1568 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1569 | struct nfsd4_sequence *seq) | |
074fe897 | 1570 | { |
557ce264 | 1571 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1572 | __be32 status; |
1573 | ||
557ce264 | 1574 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1575 | |
abfabf8c AA |
1576 | /* Either returns 0 or nfserr_retry_uncached */ |
1577 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1578 | if (status == nfserr_retry_uncached_rep) | |
1579 | return status; | |
074fe897 | 1580 | |
557ce264 AA |
1581 | /* The sequence operation has been encoded, cstate->datap set. */ |
1582 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1583 | |
557ce264 AA |
1584 | resp->opcnt = slot->sl_opcnt; |
1585 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1586 | status = slot->sl_status; | |
074fe897 AA |
1587 | |
1588 | return status; | |
1589 | } | |
1590 | ||
0733d213 AA |
1591 | /* |
1592 | * Set the exchange_id flags returned by the server. | |
1593 | */ | |
1594 | static void | |
1595 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1596 | { | |
1597 | /* pNFS is not supported */ | |
1598 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1599 | ||
1600 | /* Referrals are supported, Migration is not. */ | |
1601 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1602 | ||
1603 | /* set the wire flags to return to client. */ | |
1604 | clid->flags = new->cl_exchange_flags; | |
1605 | } | |
1606 | ||
631fc9ea BF |
1607 | static bool client_has_state(struct nfs4_client *clp) |
1608 | { | |
1609 | /* | |
1610 | * Note clp->cl_openowners check isn't quite right: there's no | |
1611 | * need to count owners without stateid's. | |
1612 | * | |
1613 | * Also note we should probably be using this in 4.0 case too. | |
1614 | */ | |
6eccece9 BF |
1615 | return !list_empty(&clp->cl_openowners) |
1616 | || !list_empty(&clp->cl_delegations) | |
1617 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1618 | } |
1619 | ||
069b6ad4 AA |
1620 | __be32 |
1621 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1622 | struct nfsd4_compound_state *cstate, | |
1623 | struct nfsd4_exchange_id *exid) | |
1624 | { | |
0733d213 | 1625 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1626 | __be32 status; |
363168b4 | 1627 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1628 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1629 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1630 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1631 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1632 | |
363168b4 | 1633 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1634 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1635 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1636 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1637 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1638 | |
a084daf5 | 1639 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1640 | return nfserr_inval; |
1641 | ||
1642 | /* Currently only support SP4_NONE */ | |
1643 | switch (exid->spa_how) { | |
1644 | case SP4_NONE: | |
1645 | break; | |
063b0fb9 BF |
1646 | default: /* checked by xdr code */ |
1647 | WARN_ON_ONCE(1); | |
0733d213 | 1648 | case SP4_SSV: |
0733d213 AA |
1649 | case SP4_MACH_CRED: |
1650 | return nfserr_serverfault; /* no excuse :-/ */ | |
1651 | } | |
1652 | ||
2dbb269d | 1653 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1654 | nfs4_lock_state(); |
382a62e7 | 1655 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1656 | if (conf) { |
83e08fd4 BF |
1657 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1658 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1659 | ||
136e658d BF |
1660 | if (update) { |
1661 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1662 | status = nfserr_inval; |
1a308118 BF |
1663 | goto out; |
1664 | } | |
136e658d | 1665 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1666 | status = nfserr_perm; |
136e658d BF |
1667 | goto out; |
1668 | } | |
1669 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1670 | status = nfserr_not_same; |
1671 | goto out; | |
1672 | } | |
136e658d BF |
1673 | /* case 6 */ |
1674 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1675 | new = conf; | |
1676 | goto out_copy; | |
0733d213 | 1677 | } |
136e658d | 1678 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1679 | if (client_has_state(conf)) { |
1680 | status = nfserr_clid_inuse; | |
0733d213 AA |
1681 | goto out; |
1682 | } | |
1683 | expire_client(conf); | |
1684 | goto out_new; | |
1685 | } | |
136e658d | 1686 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1687 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1688 | new = conf; |
1689 | goto out_copy; | |
1690 | } | |
1691 | /* case 5, client reboot */ | |
136e658d | 1692 | goto out_new; |
6ddbbbfe MS |
1693 | } |
1694 | ||
2dbb269d | 1695 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1696 | status = nfserr_noent; |
1697 | goto out; | |
0733d213 AA |
1698 | } |
1699 | ||
a99454aa | 1700 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1701 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1702 | expire_client(unconf); |
0733d213 | 1703 | |
2dbb269d | 1704 | /* case 1 (normal case) */ |
0733d213 | 1705 | out_new: |
2216d449 | 1706 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1707 | if (new == NULL) { |
4731030d | 1708 | status = nfserr_jukebox; |
0733d213 AA |
1709 | goto out; |
1710 | } | |
c116a0af | 1711 | new->cl_minorversion = 1; |
0733d213 | 1712 | |
c212cecf | 1713 | gen_clid(new, nn); |
ac55fdc4 | 1714 | add_to_unconfirmed(new); |
0733d213 AA |
1715 | out_copy: |
1716 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1717 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1718 | ||
778df3f0 | 1719 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1720 | nfsd4_set_ex_flags(new, exid); |
1721 | ||
1722 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1723 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1724 | status = nfs_ok; |
1725 | ||
1726 | out: | |
1727 | nfs4_unlock_state(); | |
0733d213 | 1728 | return status; |
069b6ad4 AA |
1729 | } |
1730 | ||
57b7b43b | 1731 | static __be32 |
88e588d5 | 1732 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1733 | { |
88e588d5 AA |
1734 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1735 | slot_seqid); | |
b85d4c01 BH |
1736 | |
1737 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1738 | if (slot_inuse) { |
1739 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1740 | return nfserr_jukebox; |
1741 | else | |
1742 | return nfserr_seq_misordered; | |
1743 | } | |
f6d82485 | 1744 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1745 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1746 | return nfs_ok; |
88e588d5 | 1747 | if (seqid == slot_seqid) |
b85d4c01 | 1748 | return nfserr_replay_cache; |
b85d4c01 BH |
1749 | return nfserr_seq_misordered; |
1750 | } | |
1751 | ||
49557cc7 AA |
1752 | /* |
1753 | * Cache the create session result into the create session single DRC | |
1754 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1755 | * Do this for solo or embedded create session operations. | |
1756 | */ | |
1757 | static void | |
1758 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1759 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1760 | { |
1761 | slot->sl_status = nfserr; | |
1762 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1763 | } | |
1764 | ||
1765 | static __be32 | |
1766 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1767 | struct nfsd4_clid_slot *slot) | |
1768 | { | |
1769 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1770 | return slot->sl_status; | |
1771 | } | |
1772 | ||
1b74c25b MJ |
1773 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1774 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1775 | 1 + /* MIN tag is length with zero, only length */ \ | |
1776 | 3 + /* version, opcount, opcode */ \ | |
1777 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1778 | /* seqid, slotID, slotID, cache */ \ | |
1779 | 4 ) * sizeof(__be32)) | |
1780 | ||
1781 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1782 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1783 | 1 + /* status */ \ | |
1784 | 1 + /* MIN tag is length with zero, only length */ \ | |
1785 | 3 + /* opcount, opcode, opstatus*/ \ | |
1786 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1787 | /* seqid, slotID, slotID, slotID, status */ \ | |
1788 | 5 ) * sizeof(__be32)) | |
1789 | ||
57b7b43b | 1790 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1791 | { |
1792 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1793 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1794 | } | |
1795 | ||
069b6ad4 AA |
1796 | __be32 |
1797 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1798 | struct nfsd4_compound_state *cstate, | |
1799 | struct nfsd4_create_session *cr_ses) | |
1800 | { | |
363168b4 | 1801 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1802 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1803 | struct nfsd4_session *new; |
81f0b2a4 | 1804 | struct nfsd4_conn *conn; |
49557cc7 | 1805 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1806 | __be32 status = 0; |
8daae4dc | 1807 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 1808 | |
a62573dc MJ |
1809 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1810 | return nfserr_inval; | |
49730501 BF |
1811 | if (check_forechannel_attrs(cr_ses->fore_channel)) |
1812 | return nfserr_toosmall; | |
9dd9845f | 1813 | new = alloc_session(&cr_ses->fore_channel, nn); |
81f0b2a4 BF |
1814 | if (!new) |
1815 | return nfserr_jukebox; | |
1816 | status = nfserr_jukebox; | |
1817 | conn = alloc_conn_from_crses(rqstp, cr_ses); | |
1818 | if (!conn) | |
1819 | goto out_free_session; | |
a62573dc | 1820 | |
ec6b5d7b | 1821 | nfs4_lock_state(); |
0a7ec377 | 1822 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 1823 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 1824 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
1825 | |
1826 | if (conf) { | |
49557cc7 AA |
1827 | cs_slot = &conf->cl_cs_slot; |
1828 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1829 | if (status == nfserr_replay_cache) { |
49557cc7 | 1830 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1831 | goto out_free_conn; |
49557cc7 | 1832 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1833 | status = nfserr_seq_misordered; |
81f0b2a4 | 1834 | goto out_free_conn; |
ec6b5d7b | 1835 | } |
ec6b5d7b | 1836 | } else if (unconf) { |
8f9d3d3b | 1837 | struct nfs4_client *old; |
ec6b5d7b | 1838 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1839 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1840 | status = nfserr_clid_inuse; |
81f0b2a4 | 1841 | goto out_free_conn; |
ec6b5d7b | 1842 | } |
49557cc7 AA |
1843 | cs_slot = &unconf->cl_cs_slot; |
1844 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1845 | if (status) { |
1846 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1847 | status = nfserr_seq_misordered; |
81f0b2a4 | 1848 | goto out_free_conn; |
ec6b5d7b | 1849 | } |
382a62e7 | 1850 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
1851 | if (old) { |
1852 | status = mark_client_expired(old); | |
1853 | if (status) | |
1854 | goto out_free_conn; | |
8f9d3d3b | 1855 | expire_client(old); |
221a6876 | 1856 | } |
8f9d3d3b | 1857 | move_to_confirmed(unconf); |
ec6b5d7b AA |
1858 | conf = unconf; |
1859 | } else { | |
1860 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1861 | goto out_free_conn; |
ec6b5d7b | 1862 | } |
81f0b2a4 | 1863 | status = nfs_ok; |
408b79bc BF |
1864 | /* |
1865 | * We do not support RDMA or persistent sessions | |
1866 | */ | |
1867 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1868 | cr_ses->flags &= ~SESSION4_RDMA; | |
1869 | ||
81f0b2a4 BF |
1870 | init_session(rqstp, new, conf, cr_ses); |
1871 | nfsd4_init_conn(rqstp, conn, new); | |
1872 | ||
ac7c46f2 | 1873 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1874 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1875 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1876 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1877 | cs_slot->sl_seqid++; |
49557cc7 | 1878 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1879 | |
49557cc7 AA |
1880 | /* cache solo and embedded create sessions under the state lock */ |
1881 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 1882 | nfs4_unlock_state(); |
ec6b5d7b | 1883 | return status; |
81f0b2a4 | 1884 | out_free_conn: |
266533c6 | 1885 | nfs4_unlock_state(); |
81f0b2a4 BF |
1886 | free_conn(conn); |
1887 | out_free_session: | |
1888 | __free_session(new); | |
1ca50792 | 1889 | return status; |
069b6ad4 AA |
1890 | } |
1891 | ||
1d1bc8f2 BF |
1892 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1893 | { | |
1894 | switch (*dir) { | |
1895 | case NFS4_CDFC4_FORE: | |
1896 | case NFS4_CDFC4_BACK: | |
1897 | return nfs_ok; | |
1898 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1899 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1900 | *dir = NFS4_CDFC4_BOTH; | |
1901 | return nfs_ok; | |
1902 | }; | |
1903 | return nfserr_inval; | |
1904 | } | |
1905 | ||
cb73a9f4 BF |
1906 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
1907 | { | |
1908 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 1909 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
cb73a9f4 | 1910 | |
c9a49628 | 1911 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
1912 | session->se_cb_prog = bc->bc_cb_program; |
1913 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 1914 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
1915 | |
1916 | nfsd4_probe_callback(session->se_client); | |
1917 | ||
1918 | return nfs_ok; | |
1919 | } | |
1920 | ||
1d1bc8f2 BF |
1921 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
1922 | struct nfsd4_compound_state *cstate, | |
1923 | struct nfsd4_bind_conn_to_session *bcts) | |
1924 | { | |
1925 | __be32 status; | |
3ba63671 | 1926 | struct nfsd4_conn *conn; |
4f6e6c17 | 1927 | struct nfsd4_session *session; |
c9a49628 | 1928 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1d1bc8f2 BF |
1929 | |
1930 | if (!nfsd4_last_compound_op(rqstp)) | |
1931 | return nfserr_not_only_op; | |
4f6e6c17 | 1932 | nfs4_lock_state(); |
c9a49628 | 1933 | spin_lock(&nn->client_lock); |
4f6e6c17 | 1934 | session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
c9a49628 | 1935 | spin_unlock(&nn->client_lock); |
4f6e6c17 BF |
1936 | status = nfserr_badsession; |
1937 | if (!session) | |
1938 | goto out; | |
1d1bc8f2 | 1939 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 1940 | if (status) |
4f6e6c17 | 1941 | goto out; |
3ba63671 | 1942 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 1943 | status = nfserr_jukebox; |
3ba63671 | 1944 | if (!conn) |
4f6e6c17 BF |
1945 | goto out; |
1946 | nfsd4_init_conn(rqstp, conn, session); | |
1947 | status = nfs_ok; | |
1948 | out: | |
1949 | nfs4_unlock_state(); | |
1950 | return status; | |
1d1bc8f2 BF |
1951 | } |
1952 | ||
5d4cec2f BF |
1953 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1954 | { | |
1955 | if (!session) | |
1956 | return 0; | |
1957 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1958 | } | |
1959 | ||
069b6ad4 AA |
1960 | __be32 |
1961 | nfsd4_destroy_session(struct svc_rqst *r, | |
1962 | struct nfsd4_compound_state *cstate, | |
1963 | struct nfsd4_destroy_session *sessionid) | |
1964 | { | |
e10e0cfc | 1965 | struct nfsd4_session *ses; |
abcdff09 | 1966 | __be32 status; |
c9a49628 | 1967 | struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); |
e10e0cfc | 1968 | |
abcdff09 BF |
1969 | nfs4_lock_state(); |
1970 | status = nfserr_not_only_op; | |
5d4cec2f | 1971 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 1972 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 1973 | goto out; |
57716355 | 1974 | } |
e10e0cfc | 1975 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 1976 | spin_lock(&nn->client_lock); |
1872de0e | 1977 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
abcdff09 BF |
1978 | status = nfserr_badsession; |
1979 | if (!ses) | |
1980 | goto out_client_lock; | |
66b2b9b2 BF |
1981 | status = mark_session_dead_locked(ses); |
1982 | if (status) | |
1983 | goto out_client_lock; | |
e10e0cfc | 1984 | unhash_session(ses); |
c9a49628 | 1985 | spin_unlock(&nn->client_lock); |
e10e0cfc | 1986 | |
84f5f7cc | 1987 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 1988 | |
c9a49628 | 1989 | spin_lock(&nn->client_lock); |
66b2b9b2 | 1990 | free_session(ses); |
e10e0cfc | 1991 | status = nfs_ok; |
abcdff09 BF |
1992 | out_client_lock: |
1993 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 1994 | out: |
abcdff09 | 1995 | nfs4_unlock_state(); |
e10e0cfc | 1996 | return status; |
069b6ad4 AA |
1997 | } |
1998 | ||
a663bdd8 | 1999 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2000 | { |
2001 | struct nfsd4_conn *c; | |
2002 | ||
2003 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2004 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2005 | return c; |
2006 | } | |
2007 | } | |
2008 | return NULL; | |
2009 | } | |
2010 | ||
a663bdd8 | 2011 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2012 | { |
2013 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2014 | struct nfsd4_conn *c; |
21b75b01 | 2015 | int ret; |
328ead28 BF |
2016 | |
2017 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2018 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
2019 | if (c) { |
2020 | spin_unlock(&clp->cl_lock); | |
2021 | free_conn(new); | |
2022 | return; | |
2023 | } | |
2024 | __nfsd4_hash_conn(new, ses); | |
2025 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2026 | ret = nfsd4_register_conn(new); |
2027 | if (ret) | |
2028 | /* oops; xprt is already down: */ | |
2029 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
2030 | return; |
2031 | } | |
2032 | ||
868b89c3 MJ |
2033 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2034 | { | |
2035 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2036 | ||
2037 | return args->opcnt > session->se_fchannel.maxops; | |
2038 | } | |
2039 | ||
ae82a8d0 MJ |
2040 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2041 | struct nfsd4_session *session) | |
2042 | { | |
2043 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2044 | ||
2045 | return xb->len > session->se_fchannel.maxreq_sz; | |
2046 | } | |
2047 | ||
069b6ad4 | 2048 | __be32 |
b85d4c01 | 2049 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2050 | struct nfsd4_compound_state *cstate, |
2051 | struct nfsd4_sequence *seq) | |
2052 | { | |
f9bb94c4 | 2053 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 | 2054 | struct nfsd4_session *session; |
221a6876 | 2055 | struct nfs4_client *clp; |
b85d4c01 | 2056 | struct nfsd4_slot *slot; |
a663bdd8 | 2057 | struct nfsd4_conn *conn; |
57b7b43b | 2058 | __be32 status; |
c9a49628 | 2059 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b85d4c01 | 2060 | |
f9bb94c4 AA |
2061 | if (resp->opcnt != 1) |
2062 | return nfserr_sequence_pos; | |
2063 | ||
a663bdd8 BF |
2064 | /* |
2065 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2066 | * below. | |
2067 | */ | |
2068 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2069 | if (!conn) | |
2070 | return nfserr_jukebox; | |
2071 | ||
c9a49628 | 2072 | spin_lock(&nn->client_lock); |
b85d4c01 | 2073 | status = nfserr_badsession; |
1872de0e | 2074 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
b85d4c01 | 2075 | if (!session) |
221a6876 BF |
2076 | goto out_no_session; |
2077 | clp = session->se_client; | |
2078 | status = get_client_locked(clp); | |
2079 | if (status) | |
2080 | goto out_no_session; | |
66b2b9b2 BF |
2081 | status = nfsd4_get_session_locked(session); |
2082 | if (status) | |
2083 | goto out_put_client; | |
b85d4c01 | 2084 | |
868b89c3 MJ |
2085 | status = nfserr_too_many_ops; |
2086 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2087 | goto out_put_session; |
868b89c3 | 2088 | |
ae82a8d0 MJ |
2089 | status = nfserr_req_too_big; |
2090 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2091 | goto out_put_session; |
ae82a8d0 | 2092 | |
b85d4c01 | 2093 | status = nfserr_badslot; |
6c18ba9f | 2094 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2095 | goto out_put_session; |
b85d4c01 | 2096 | |
557ce264 | 2097 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2098 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2099 | ||
a8dfdaeb AA |
2100 | /* We do not negotiate the number of slots yet, so set the |
2101 | * maxslots to the session maxreqs which is used to encode | |
2102 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2103 | seq->maxslots = session->se_fchannel.maxreqs; | |
2104 | ||
73e79482 BF |
2105 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2106 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2107 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2108 | status = nfserr_seq_misordered; |
2109 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2110 | goto out_put_session; |
b85d4c01 BH |
2111 | cstate->slot = slot; |
2112 | cstate->session = session; | |
da3846a2 | 2113 | /* Return the cached reply status and set cstate->status |
557ce264 | 2114 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2115 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2116 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2117 | goto out; |
b85d4c01 BH |
2118 | } |
2119 | if (status) | |
66b2b9b2 | 2120 | goto out_put_session; |
b85d4c01 | 2121 | |
a663bdd8 BF |
2122 | nfsd4_sequence_check_conn(conn, session); |
2123 | conn = NULL; | |
328ead28 | 2124 | |
b85d4c01 | 2125 | /* Success! bump slot seqid */ |
b85d4c01 | 2126 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2127 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2128 | if (seq->cachethis) |
2129 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2130 | else |
2131 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2132 | |
2133 | cstate->slot = slot; | |
2134 | cstate->session = session; | |
2135 | ||
b85d4c01 | 2136 | out: |
221a6876 BF |
2137 | switch (clp->cl_cb_state) { |
2138 | case NFSD4_CB_DOWN: | |
2139 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2140 | break; | |
2141 | case NFSD4_CB_FAULT: | |
2142 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2143 | break; | |
2144 | default: | |
2145 | seq->status_flags = 0; | |
aaf84eb9 | 2146 | } |
221a6876 | 2147 | out_no_session: |
a663bdd8 | 2148 | kfree(conn); |
c9a49628 | 2149 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2150 | return status; |
66b2b9b2 BF |
2151 | out_put_session: |
2152 | nfsd4_put_session(session); | |
221a6876 BF |
2153 | out_put_client: |
2154 | put_client_renew_locked(clp); | |
2155 | goto out_no_session; | |
069b6ad4 AA |
2156 | } |
2157 | ||
345c2842 MJ |
2158 | __be32 |
2159 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2160 | { | |
2161 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2162 | __be32 status = 0; |
8daae4dc | 2163 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2164 | |
2165 | nfs4_lock_state(); | |
0a7ec377 | 2166 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2167 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2168 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2169 | |
2170 | if (conf) { | |
2171 | clp = conf; | |
2172 | ||
c0293b01 | 2173 | if (client_has_state(conf)) { |
345c2842 MJ |
2174 | status = nfserr_clientid_busy; |
2175 | goto out; | |
2176 | } | |
2177 | } else if (unconf) | |
2178 | clp = unconf; | |
2179 | else { | |
2180 | status = nfserr_stale_clientid; | |
2181 | goto out; | |
2182 | } | |
2183 | ||
2184 | expire_client(clp); | |
2185 | out: | |
2186 | nfs4_unlock_state(); | |
345c2842 MJ |
2187 | return status; |
2188 | } | |
2189 | ||
4dc6ec00 BF |
2190 | __be32 |
2191 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2192 | { | |
57b7b43b | 2193 | __be32 status = 0; |
bcecf1cc | 2194 | |
4dc6ec00 BF |
2195 | if (rc->rca_one_fs) { |
2196 | if (!cstate->current_fh.fh_dentry) | |
2197 | return nfserr_nofilehandle; | |
2198 | /* | |
2199 | * We don't take advantage of the rca_one_fs case. | |
2200 | * That's OK, it's optional, we can safely ignore it. | |
2201 | */ | |
2202 | return nfs_ok; | |
2203 | } | |
bcecf1cc | 2204 | |
4dc6ec00 | 2205 | nfs4_lock_state(); |
bcecf1cc | 2206 | status = nfserr_complete_already; |
a52d726b JL |
2207 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2208 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2209 | goto out; |
2210 | ||
2211 | status = nfserr_stale_clientid; | |
2212 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2213 | /* |
2214 | * The following error isn't really legal. | |
2215 | * But we only get here if the client just explicitly | |
2216 | * destroyed the client. Surely it no longer cares what | |
2217 | * error it gets back on an operation for the dead | |
2218 | * client. | |
2219 | */ | |
bcecf1cc MJ |
2220 | goto out; |
2221 | ||
2222 | status = nfs_ok; | |
2a4317c5 | 2223 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2224 | out: |
4dc6ec00 | 2225 | nfs4_unlock_state(); |
bcecf1cc | 2226 | return status; |
4dc6ec00 BF |
2227 | } |
2228 | ||
b37ad28b | 2229 | __be32 |
b591480b BF |
2230 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2231 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2232 | { |
a084daf5 | 2233 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2234 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2235 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2236 | __be32 status; |
c212cecf SK |
2237 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2238 | ||
63db4632 | 2239 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2240 | nfs4_lock_state(); |
382a62e7 | 2241 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2242 | if (conf) { |
63db4632 | 2243 | /* case 0: */ |
1da177e4 | 2244 | status = nfserr_clid_inuse; |
e203d506 BF |
2245 | if (clp_used_exchangeid(conf)) |
2246 | goto out; | |
026722c2 | 2247 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2248 | char addr_str[INET6_ADDRSTRLEN]; |
2249 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2250 | sizeof(addr_str)); | |
2251 | dprintk("NFSD: setclientid: string in use by client " | |
2252 | "at %s\n", addr_str); | |
1da177e4 LT |
2253 | goto out; |
2254 | } | |
1da177e4 | 2255 | } |
a99454aa | 2256 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2257 | if (unconf) |
2258 | expire_client(unconf); | |
3e772463 | 2259 | status = nfserr_jukebox; |
2216d449 | 2260 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2261 | if (new == NULL) |
2262 | goto out; | |
34b232bb | 2263 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2264 | /* case 1: probable callback update */ |
1da177e4 | 2265 | copy_clid(new, conf); |
34b232bb | 2266 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2267 | gen_clid(new, nn); |
8323c3b2 | 2268 | new->cl_minorversion = 0; |
6f3d772f | 2269 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2270 | add_to_unconfirmed(new); |
1da177e4 LT |
2271 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2272 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2273 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2274 | status = nfs_ok; | |
2275 | out: | |
2276 | nfs4_unlock_state(); | |
2277 | return status; | |
2278 | } | |
2279 | ||
2280 | ||
b37ad28b | 2281 | __be32 |
b591480b BF |
2282 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2283 | struct nfsd4_compound_state *cstate, | |
2284 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2285 | { |
21ab45a4 | 2286 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2287 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2288 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2289 | __be32 status; |
7f2210fa | 2290 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2291 | |
2c142baa | 2292 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2293 | return nfserr_stale_clientid; |
1da177e4 | 2294 | nfs4_lock_state(); |
21ab45a4 | 2295 | |
8daae4dc | 2296 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2297 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2298 | /* |
8695b90a BF |
2299 | * We try hard to give out unique clientid's, so if we get an |
2300 | * attempt to confirm the same clientid with a different cred, | |
2301 | * there's a bug somewhere. Let's charitably assume it's our | |
2302 | * bug. | |
a186e767 | 2303 | */ |
8695b90a BF |
2304 | status = nfserr_serverfault; |
2305 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2306 | goto out; | |
2307 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2308 | goto out; | |
63db4632 | 2309 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2310 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2311 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2312 | status = nfs_ok; |
90d700b7 BF |
2313 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2314 | status = nfserr_stale_clientid; | |
2315 | goto out; | |
2316 | } | |
2317 | status = nfs_ok; | |
2318 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2319 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2320 | nfsd4_probe_callback(conf); | |
2321 | expire_client(unconf); | |
90d700b7 | 2322 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2323 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2324 | if (conf) { |
2325 | status = mark_client_expired(conf); | |
2326 | if (status) | |
2327 | goto out; | |
8695b90a | 2328 | expire_client(conf); |
221a6876 | 2329 | } |
8695b90a | 2330 | move_to_confirmed(unconf); |
f3d03b92 | 2331 | nfsd4_probe_callback(unconf); |
08e8987c | 2332 | } |
1da177e4 | 2333 | out: |
1da177e4 LT |
2334 | nfs4_unlock_state(); |
2335 | return status; | |
2336 | } | |
2337 | ||
32513b40 BF |
2338 | static struct nfs4_file *nfsd4_alloc_file(void) |
2339 | { | |
2340 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2341 | } | |
2342 | ||
1da177e4 | 2343 | /* OPEN Share state helper functions */ |
32513b40 | 2344 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2345 | { |
1da177e4 LT |
2346 | unsigned int hashval = file_hashval(ino); |
2347 | ||
32513b40 | 2348 | atomic_set(&fp->fi_ref, 1); |
32513b40 BF |
2349 | INIT_LIST_HEAD(&fp->fi_stateids); |
2350 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2351 | fp->fi_inode = igrab(ino); | |
2352 | fp->fi_had_conflict = false; | |
2353 | fp->fi_lease = NULL; | |
2354 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2355 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2356 | spin_lock(&recall_lock); | |
89876f8c | 2357 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
32513b40 | 2358 | spin_unlock(&recall_lock); |
1da177e4 LT |
2359 | } |
2360 | ||
e60d4398 | 2361 | static void |
e18b890b | 2362 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2363 | { |
e60d4398 N |
2364 | if (*slab == NULL) |
2365 | return; | |
1a1d92c1 | 2366 | kmem_cache_destroy(*slab); |
e60d4398 | 2367 | *slab = NULL; |
1da177e4 LT |
2368 | } |
2369 | ||
e8ff2a84 | 2370 | void |
1da177e4 LT |
2371 | nfsd4_free_slabs(void) |
2372 | { | |
fe0750e5 BF |
2373 | nfsd4_free_slab(&openowner_slab); |
2374 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2375 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2376 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2377 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2378 | } |
1da177e4 | 2379 | |
72083396 | 2380 | int |
e60d4398 N |
2381 | nfsd4_init_slabs(void) |
2382 | { | |
fe0750e5 BF |
2383 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2384 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2385 | if (openowner_slab == NULL) | |
2386 | goto out_nomem; | |
2387 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2388 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2389 | if (lockowner_slab == NULL) |
e60d4398 N |
2390 | goto out_nomem; |
2391 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2392 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2393 | if (file_slab == NULL) |
2394 | goto out_nomem; | |
5ac049ac | 2395 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2396 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2397 | if (stateid_slab == NULL) |
2398 | goto out_nomem; | |
5b2d21c1 | 2399 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2400 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2401 | if (deleg_slab == NULL) |
2402 | goto out_nomem; | |
e60d4398 N |
2403 | return 0; |
2404 | out_nomem: | |
2405 | nfsd4_free_slabs(); | |
2406 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2407 | return -ENOMEM; | |
1da177e4 LT |
2408 | } |
2409 | ||
fe0750e5 BF |
2410 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2411 | { | |
2412 | kfree(oo->oo_owner.so_owner.data); | |
2413 | kmem_cache_free(openowner_slab, oo); | |
2414 | } | |
2415 | ||
2416 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2417 | { |
fe0750e5 BF |
2418 | kfree(lo->lo_owner.so_owner.data); |
2419 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2420 | } |
2421 | ||
ff194bd9 | 2422 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2423 | { |
ff194bd9 BF |
2424 | rp->rp_status = nfserr_serverfault; |
2425 | rp->rp_buflen = 0; | |
2426 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2427 | } |
2428 | ||
fe0750e5 | 2429 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2430 | { |
1da177e4 | 2431 | struct nfs4_stateowner *sop; |
1da177e4 | 2432 | |
fe0750e5 | 2433 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2434 | if (!sop) |
2435 | return NULL; | |
2436 | ||
2437 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2438 | if (!sop->so_owner.data) { | |
fe0750e5 | 2439 | kmem_cache_free(slab, sop); |
1da177e4 | 2440 | return NULL; |
ff194bd9 BF |
2441 | } |
2442 | sop->so_owner.len = owner->len; | |
2443 | ||
ea1da636 | 2444 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2445 | sop->so_client = clp; |
2446 | init_nfs4_replay(&sop->so_replay); | |
2447 | return sop; | |
2448 | } | |
2449 | ||
fe0750e5 | 2450 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2451 | { |
9b531137 SK |
2452 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2453 | ||
2454 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2455 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2456 | } |
2457 | ||
fe0750e5 | 2458 | static struct nfs4_openowner * |
ff194bd9 | 2459 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2460 | struct nfs4_openowner *oo; |
ff194bd9 | 2461 | |
fe0750e5 BF |
2462 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2463 | if (!oo) | |
ff194bd9 | 2464 | return NULL; |
fe0750e5 BF |
2465 | oo->oo_owner.so_is_open_owner = 1; |
2466 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2467 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2468 | oo->oo_time = 0; |
38c387b5 | 2469 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2470 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2471 | hash_openowner(oo, clp, strhashval); | |
2472 | return oo; | |
1da177e4 LT |
2473 | } |
2474 | ||
996e0938 | 2475 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2476 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2477 | |
3abdb607 | 2478 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
ea1da636 | 2479 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2480 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2481 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2482 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2483 | get_nfs4_file(fp); |
1da177e4 | 2484 | stp->st_file = fp; |
1da177e4 LT |
2485 | stp->st_access_bmap = 0; |
2486 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2487 | set_access(open->op_share_access, stp); |
ce0fc43c | 2488 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2489 | stp->st_openstp = NULL; |
1da177e4 LT |
2490 | } |
2491 | ||
fd39ca9a | 2492 | static void |
73758fed | 2493 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2494 | { |
73758fed SK |
2495 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2496 | ||
fe0750e5 | 2497 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2498 | |
73758fed | 2499 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2500 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2501 | } |
2502 | ||
1da177e4 | 2503 | static int |
599e0a22 BF |
2504 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2505 | clientid_t *clid) | |
2506 | { | |
2507 | return (sop->so_owner.len == owner->len) && | |
2508 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2509 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2510 | } |
2511 | ||
fe0750e5 | 2512 | static struct nfs4_openowner * |
9b531137 SK |
2513 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2514 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2515 | { |
a50d2ad1 BF |
2516 | struct nfs4_stateowner *so; |
2517 | struct nfs4_openowner *oo; | |
d15c077e | 2518 | struct nfs4_client *clp; |
1da177e4 | 2519 | |
9b531137 | 2520 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2521 | if (!so->so_is_open_owner) |
2522 | continue; | |
a50d2ad1 BF |
2523 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2524 | oo = openowner(so); | |
d15c077e BF |
2525 | clp = oo->oo_owner.so_client; |
2526 | if ((bool)clp->cl_minorversion != sessions) | |
2527 | return NULL; | |
a50d2ad1 BF |
2528 | renew_client(oo->oo_owner.so_client); |
2529 | return oo; | |
2530 | } | |
1da177e4 LT |
2531 | } |
2532 | return NULL; | |
2533 | } | |
2534 | ||
2535 | /* search file_hashtbl[] for file */ | |
2536 | static struct nfs4_file * | |
2537 | find_file(struct inode *ino) | |
2538 | { | |
2539 | unsigned int hashval = file_hashval(ino); | |
2540 | struct nfs4_file *fp; | |
2541 | ||
8b671b80 | 2542 | spin_lock(&recall_lock); |
89876f8c | 2543 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2544 | if (fp->fi_inode == ino) { |
2545 | get_nfs4_file(fp); | |
8b671b80 | 2546 | spin_unlock(&recall_lock); |
1da177e4 | 2547 | return fp; |
13cd2184 | 2548 | } |
1da177e4 | 2549 | } |
8b671b80 | 2550 | spin_unlock(&recall_lock); |
1da177e4 LT |
2551 | return NULL; |
2552 | } | |
2553 | ||
1da177e4 LT |
2554 | /* |
2555 | * Called to check deny when READ with all zero stateid or | |
2556 | * WRITE with all zero or all one stateid | |
2557 | */ | |
b37ad28b | 2558 | static __be32 |
1da177e4 LT |
2559 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2560 | { | |
2561 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2562 | struct nfs4_file *fp; | |
dcef0413 | 2563 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2564 | __be32 ret; |
1da177e4 | 2565 | |
1da177e4 | 2566 | fp = find_file(ino); |
13cd2184 N |
2567 | if (!fp) |
2568 | return nfs_ok; | |
b700949b | 2569 | ret = nfserr_locked; |
1da177e4 | 2570 | /* Search for conflicting share reservations */ |
13cd2184 | 2571 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2572 | if (test_deny(deny_type, stp) || |
2573 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2574 | goto out; |
1da177e4 | 2575 | } |
13cd2184 N |
2576 | ret = nfs_ok; |
2577 | out: | |
2578 | put_nfs4_file(fp); | |
2579 | return ret; | |
1da177e4 LT |
2580 | } |
2581 | ||
6b57d9c8 | 2582 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2583 | { |
e8c69d17 BF |
2584 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
2585 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2586 | ||
1da177e4 LT |
2587 | /* We're assuming the state code never drops its reference |
2588 | * without first removing the lease. Since we're in this lease | |
2589 | * callback (and since the lease code is serialized by the kernel | |
2590 | * lock) we know the server hasn't removed the lease yet, we know | |
2591 | * it's safe to take a reference: */ | |
2592 | atomic_inc(&dp->dl_count); | |
2593 | ||
e8c69d17 | 2594 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
1da177e4 | 2595 | |
460781b5 | 2596 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2597 | dp->dl_time = get_seconds(); |
2598 | ||
6b57d9c8 BF |
2599 | nfsd4_cb_recall(dp); |
2600 | } | |
2601 | ||
acfdf5c3 | 2602 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2603 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2604 | { | |
acfdf5c3 BF |
2605 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2606 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2607 | |
7fa10cd1 BF |
2608 | if (!fp) { |
2609 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2610 | return; | |
2611 | } | |
2612 | if (fp->fi_had_conflict) { | |
2613 | WARN(1, "duplicate break on %p\n", fp); | |
2614 | return; | |
2615 | } | |
0272e1fd BF |
2616 | /* |
2617 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2618 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2619 | * in time: |
0272e1fd BF |
2620 | */ |
2621 | fl->fl_break_time = 0; | |
1da177e4 | 2622 | |
5d926e8c | 2623 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2624 | fp->fi_had_conflict = true; |
2625 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2626 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2627 | spin_unlock(&recall_lock); |
1da177e4 LT |
2628 | } |
2629 | ||
1da177e4 LT |
2630 | static |
2631 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2632 | { | |
2633 | if (arg & F_UNLCK) | |
2634 | return lease_modify(onlist, arg); | |
2635 | else | |
2636 | return -EAGAIN; | |
2637 | } | |
2638 | ||
7b021967 | 2639 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2640 | .lm_break = nfsd_break_deleg_cb, |
2641 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2642 | }; |
2643 | ||
7a8711c9 BF |
2644 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2645 | { | |
2646 | if (nfsd4_has_session(cstate)) | |
2647 | return nfs_ok; | |
2648 | if (seqid == so->so_seqid - 1) | |
2649 | return nfserr_replay_me; | |
2650 | if (seqid == so->so_seqid) | |
2651 | return nfs_ok; | |
2652 | return nfserr_bad_seqid; | |
2653 | } | |
1da177e4 | 2654 | |
b37ad28b | 2655 | __be32 |
6668958f | 2656 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 2657 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 2658 | { |
1da177e4 LT |
2659 | clientid_t *clientid = &open->op_clientid; |
2660 | struct nfs4_client *clp = NULL; | |
2661 | unsigned int strhashval; | |
fe0750e5 | 2662 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2663 | __be32 status; |
1da177e4 | 2664 | |
2c142baa | 2665 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2666 | return nfserr_stale_clientid; |
32513b40 BF |
2667 | /* |
2668 | * In case we need it later, after we've already created the | |
2669 | * file and don't want to risk a further failure: | |
2670 | */ | |
2671 | open->op_file = nfsd4_alloc_file(); | |
2672 | if (open->op_file == NULL) | |
2673 | return nfserr_jukebox; | |
1da177e4 | 2674 | |
16bfdaaf | 2675 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 2676 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
2677 | open->op_openowner = oo; |
2678 | if (!oo) { | |
8daae4dc SK |
2679 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2680 | nn); | |
1da177e4 | 2681 | if (clp == NULL) |
0f442aa2 | 2682 | return nfserr_expired; |
bcf130f9 | 2683 | goto new_owner; |
1da177e4 | 2684 | } |
dad1c067 | 2685 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2686 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2687 | clp = oo->oo_owner.so_client; |
2688 | release_openowner(oo); | |
2689 | open->op_openowner = NULL; | |
bcf130f9 | 2690 | goto new_owner; |
0f442aa2 | 2691 | } |
4cdc951b BF |
2692 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2693 | if (status) | |
2694 | return status; | |
2695 | clp = oo->oo_owner.so_client; | |
2696 | goto alloc_stateid; | |
bcf130f9 BF |
2697 | new_owner: |
2698 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2699 | if (oo == NULL) | |
2700 | return nfserr_jukebox; | |
2701 | open->op_openowner = oo; | |
4cdc951b BF |
2702 | alloc_stateid: |
2703 | open->op_stp = nfs4_alloc_stateid(clp); | |
2704 | if (!open->op_stp) | |
2705 | return nfserr_jukebox; | |
0f442aa2 | 2706 | return nfs_ok; |
1da177e4 LT |
2707 | } |
2708 | ||
b37ad28b | 2709 | static inline __be32 |
4a6e43e6 N |
2710 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2711 | { | |
2712 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2713 | return nfserr_openmode; | |
2714 | else | |
2715 | return nfs_ok; | |
2716 | } | |
2717 | ||
f459e453 | 2718 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2719 | { |
f459e453 | 2720 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2721 | } |
2722 | ||
38c2f4b1 | 2723 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2724 | { |
f459e453 | 2725 | struct nfs4_stid *ret; |
24a0111e | 2726 | |
38c2f4b1 | 2727 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2728 | if (!ret) |
2729 | return NULL; | |
2730 | return delegstateid(ret); | |
24a0111e BF |
2731 | } |
2732 | ||
8b289b2c BF |
2733 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2734 | { | |
2735 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2736 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2737 | } | |
2738 | ||
b37ad28b | 2739 | static __be32 |
38c2f4b1 | 2740 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2741 | struct nfs4_delegation **dp) |
2742 | { | |
2743 | int flags; | |
b37ad28b | 2744 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2745 | |
38c2f4b1 | 2746 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2747 | if (*dp == NULL) |
c44c5eeb | 2748 | goto out; |
24a0111e | 2749 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2750 | status = nfs4_check_delegmode(*dp, flags); |
2751 | if (status) | |
2752 | *dp = NULL; | |
c44c5eeb | 2753 | out: |
8b289b2c | 2754 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2755 | return nfs_ok; |
2756 | if (status) | |
2757 | return status; | |
dad1c067 | 2758 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2759 | return nfs_ok; |
567d9829 N |
2760 | } |
2761 | ||
b37ad28b | 2762 | static __be32 |
dcef0413 | 2763 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2764 | { |
dcef0413 | 2765 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2766 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2767 | |
8beefa24 | 2768 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2769 | /* ignore lock owners */ |
2770 | if (local->st_stateowner->so_is_open_owner == 0) | |
2771 | continue; | |
2772 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2773 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2774 | *stpp = local; |
2775 | /* check for conflicting share reservations */ | |
2776 | if (!test_share(local, open)) | |
77eaae8d | 2777 | return nfserr_share_denied; |
1da177e4 | 2778 | } |
77eaae8d | 2779 | return nfs_ok; |
1da177e4 LT |
2780 | } |
2781 | ||
21fb4016 BF |
2782 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2783 | { | |
2784 | int flags = 0; | |
2785 | ||
2786 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2787 | flags |= NFSD_MAY_READ; | |
2788 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2789 | flags |= NFSD_MAY_WRITE; | |
2790 | return flags; | |
2791 | } | |
2792 | ||
0c12eaff CB |
2793 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2794 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2795 | { |
2796 | __be32 status; | |
0c12eaff CB |
2797 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2798 | int access = nfs4_access_to_access(open->op_share_access); | |
2799 | ||
f9d7562f BF |
2800 | if (!fp->fi_fds[oflag]) { |
2801 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2802 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2803 | if (status) |
2804 | return status; | |
2805 | } | |
2806 | nfs4_file_get_access(fp, oflag); | |
2807 | ||
2808 | return nfs_ok; | |
2809 | } | |
2810 | ||
b37ad28b | 2811 | static inline __be32 |
1da177e4 LT |
2812 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2813 | struct nfsd4_open *open) | |
2814 | { | |
2815 | struct iattr iattr = { | |
2816 | .ia_valid = ATTR_SIZE, | |
2817 | .ia_size = 0, | |
2818 | }; | |
2819 | if (!open->op_truncate) | |
2820 | return 0; | |
2821 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2822 | return nfserr_inval; |
1da177e4 LT |
2823 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2824 | } | |
2825 | ||
b37ad28b | 2826 | static __be32 |
dcef0413 | 2827 | 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 | 2828 | { |
b6d2f1ca | 2829 | u32 op_share_access = open->op_share_access; |
7d947842 | 2830 | bool new_access; |
b37ad28b | 2831 | __be32 status; |
1da177e4 | 2832 | |
82c5ff1b | 2833 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2834 | if (new_access) { |
0c12eaff | 2835 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2836 | if (status) |
2837 | return status; | |
6c26d08f | 2838 | } |
1da177e4 LT |
2839 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2840 | if (status) { | |
f9d7562f | 2841 | if (new_access) { |
f197c271 | 2842 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2843 | nfs4_file_put_access(fp, oflag); |
2844 | } | |
1da177e4 LT |
2845 | return status; |
2846 | } | |
2847 | /* remember the open */ | |
82c5ff1b | 2848 | set_access(op_share_access, stp); |
ce0fc43c | 2849 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2850 | |
2851 | return nfs_ok; | |
2852 | } | |
2853 | ||
2854 | ||
1da177e4 | 2855 | static void |
1255a8f3 | 2856 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2857 | { |
dad1c067 | 2858 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2859 | } |
2860 | ||
14a24e99 BF |
2861 | /* Should we give out recallable state?: */ |
2862 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2863 | { | |
2864 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2865 | return true; | |
2866 | /* | |
2867 | * In the sessions case, since we don't have to establish a | |
2868 | * separate connection for callbacks, we assume it's OK | |
2869 | * until we hear otherwise: | |
2870 | */ | |
2871 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2872 | } | |
2873 | ||
22d38c4c BF |
2874 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2875 | { | |
2876 | struct file_lock *fl; | |
2877 | ||
2878 | fl = locks_alloc_lock(); | |
2879 | if (!fl) | |
2880 | return NULL; | |
2881 | locks_init_lock(fl); | |
2882 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2883 | fl->fl_flags = FL_LEASE; | |
2884 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2885 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2886 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2887 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2888 | return fl; |
2889 | } | |
2890 | ||
edab9782 BF |
2891 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2892 | { | |
acfdf5c3 | 2893 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2894 | struct file_lock *fl; |
2895 | int status; | |
2896 | ||
2897 | fl = nfs4_alloc_init_lease(dp, flag); | |
2898 | if (!fl) | |
2899 | return -ENOMEM; | |
acfdf5c3 | 2900 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2901 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2902 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2903 | if (status) { |
acfdf5c3 | 2904 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2905 | locks_free_lock(fl); |
2906 | return -ENOMEM; | |
2907 | } | |
acfdf5c3 | 2908 | fp->fi_lease = fl; |
cb0942b8 | 2909 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
2910 | atomic_set(&fp->fi_delegees, 1); |
2911 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2912 | return 0; | |
2913 | } | |
2914 | ||
2915 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2916 | { | |
2917 | struct nfs4_file *fp = dp->dl_file; | |
2918 | ||
2919 | if (!fp->fi_lease) | |
2920 | return nfs4_setlease(dp, flag); | |
2921 | spin_lock(&recall_lock); | |
2922 | if (fp->fi_had_conflict) { | |
2923 | spin_unlock(&recall_lock); | |
2924 | return -EAGAIN; | |
2925 | } | |
2926 | atomic_inc(&fp->fi_delegees); | |
2927 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2928 | spin_unlock(&recall_lock); | |
2a74aba7 | 2929 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2930 | return 0; |
2931 | } | |
2932 | ||
4aa8913c BH |
2933 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2934 | { | |
2935 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2936 | if (status == -EAGAIN) | |
2937 | open->op_why_no_deleg = WND4_CONTENTION; | |
2938 | else { | |
2939 | open->op_why_no_deleg = WND4_RESOURCE; | |
2940 | switch (open->op_deleg_want) { | |
2941 | case NFS4_SHARE_WANT_READ_DELEG: | |
2942 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2943 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2944 | break; | |
2945 | case NFS4_SHARE_WANT_CANCEL: | |
2946 | open->op_why_no_deleg = WND4_CANCELLED; | |
2947 | break; | |
2948 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 2949 | WARN_ON_ONCE(1); |
4aa8913c BH |
2950 | } |
2951 | } | |
2952 | } | |
2953 | ||
1da177e4 LT |
2954 | /* |
2955 | * Attempt to hand out a delegation. | |
2956 | */ | |
2957 | static void | |
5ccb0066 SK |
2958 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
2959 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
2960 | { |
2961 | struct nfs4_delegation *dp; | |
fe0750e5 | 2962 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2963 | int cb_up; |
d24433cd | 2964 | int status = 0, flag = 0; |
1da177e4 | 2965 | |
fe0750e5 | 2966 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2967 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2968 | open->op_recall = 0; |
2969 | switch (open->op_claim_type) { | |
2970 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2971 | if (!cb_up) |
7b190fec N |
2972 | open->op_recall = 1; |
2973 | flag = open->op_delegate_type; | |
2974 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2975 | goto out; | |
2976 | break; | |
2977 | case NFS4_OPEN_CLAIM_NULL: | |
2978 | /* Let's not give out any delegations till everyone's | |
2979 | * had the chance to reclaim theirs.... */ | |
5ccb0066 | 2980 | if (locks_in_grace(net)) |
7b190fec | 2981 | goto out; |
dad1c067 | 2982 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2983 | goto out; |
2984 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2985 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2986 | else | |
2987 | flag = NFS4_OPEN_DELEGATE_READ; | |
2988 | break; | |
2989 | default: | |
2990 | goto out; | |
2991 | } | |
1da177e4 | 2992 | |
fe0750e5 | 2993 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2994 | if (dp == NULL) |
2995 | goto out_no_deleg; | |
acfdf5c3 | 2996 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2997 | if (status) |
dd239cc0 | 2998 | goto out_free; |
1da177e4 | 2999 | |
d5477a8d | 3000 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3001 | |
8c10cbdb | 3002 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3003 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
3004 | out: |
3005 | open->op_delegate_type = flag; | |
d24433cd BH |
3006 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
3007 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
3008 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
3009 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
3010 | ||
4aa8913c BH |
3011 | /* 4.1 client asking for a delegation? */ |
3012 | if (open->op_deleg_want) | |
3013 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 3014 | } |
dd239cc0 BF |
3015 | return; |
3016 | out_free: | |
24ffb938 | 3017 | unhash_stid(&dp->dl_stid); |
acfdf5c3 | 3018 | nfs4_put_delegation(dp); |
dd239cc0 BF |
3019 | out_no_deleg: |
3020 | flag = NFS4_OPEN_DELEGATE_NONE; | |
3021 | goto out; | |
1da177e4 LT |
3022 | } |
3023 | ||
e27f49c3 BH |
3024 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3025 | struct nfs4_delegation *dp) | |
3026 | { | |
3027 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3028 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3029 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3030 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3031 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3032 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3033 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3034 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3035 | } | |
3036 | /* Otherwise the client must be confused wanting a delegation | |
3037 | * it already has, therefore we don't return | |
3038 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3039 | */ | |
3040 | } | |
3041 | ||
1da177e4 LT |
3042 | /* |
3043 | * called with nfs4_lock_state() held. | |
3044 | */ | |
b37ad28b | 3045 | __be32 |
1da177e4 LT |
3046 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3047 | { | |
6668958f | 3048 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3049 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3050 | struct nfs4_file *fp = NULL; |
3051 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3052 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3053 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3054 | __be32 status; |
1da177e4 | 3055 | |
1da177e4 LT |
3056 | /* |
3057 | * Lookup file; if found, lookup stateid and check open request, | |
3058 | * and check for delegations in the process of being recalled. | |
3059 | * If not found, create the nfs4_file struct | |
3060 | */ | |
3061 | fp = find_file(ino); | |
3062 | if (fp) { | |
3063 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3064 | goto out; | |
38c2f4b1 | 3065 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3066 | if (status) |
3067 | goto out; | |
1da177e4 | 3068 | } else { |
c44c5eeb | 3069 | status = nfserr_bad_stateid; |
8b289b2c | 3070 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3071 | goto out; |
3e772463 | 3072 | status = nfserr_jukebox; |
32513b40 BF |
3073 | fp = open->op_file; |
3074 | open->op_file = NULL; | |
3075 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3076 | } |
3077 | ||
3078 | /* | |
3079 | * OPEN the file, or upgrade an existing OPEN. | |
3080 | * If truncate fails, the OPEN fails. | |
3081 | */ | |
3082 | if (stp) { | |
3083 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3084 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3085 | if (status) |
3086 | goto out; | |
3087 | } else { | |
4cdc951b | 3088 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3089 | if (status) |
3090 | goto out; | |
3091 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3092 | if (status) |
1da177e4 | 3093 | goto out; |
4cdc951b BF |
3094 | stp = open->op_stp; |
3095 | open->op_stp = NULL; | |
996e0938 | 3096 | init_open_stateid(stp, fp, open); |
1da177e4 | 3097 | } |
dcef0413 BF |
3098 | update_stateid(&stp->st_stid.sc_stateid); |
3099 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3100 | |
d24433cd | 3101 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3102 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3103 | |
d24433cd BH |
3104 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3105 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3106 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3107 | goto nodeleg; | |
3108 | } | |
3109 | } | |
3110 | ||
1da177e4 LT |
3111 | /* |
3112 | * Attempt to hand out a delegation. No error return, because the | |
3113 | * OPEN succeeds even if we fail. | |
3114 | */ | |
5ccb0066 | 3115 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3116 | nodeleg: |
1da177e4 LT |
3117 | status = nfs_ok; |
3118 | ||
8c10cbdb | 3119 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3120 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3121 | out: |
d24433cd BH |
3122 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3123 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3124 | open->op_deleg_want) |
3125 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3126 | |
13cd2184 N |
3127 | if (fp) |
3128 | put_nfs4_file(fp); | |
37515177 | 3129 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3130 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3131 | /* |
3132 | * To finish the open response, we just need to set the rflags. | |
3133 | */ | |
3134 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3135 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3136 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3137 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3138 | ||
3139 | return status; | |
3140 | } | |
3141 | ||
d29b20cd BF |
3142 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3143 | { | |
3144 | if (open->op_openowner) { | |
3145 | struct nfs4_openowner *oo = open->op_openowner; | |
3146 | ||
3147 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3148 | list_del_init(&oo->oo_close_lru); | |
3149 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3150 | if (status) { | |
3151 | release_openowner(oo); | |
3152 | open->op_openowner = NULL; | |
3153 | } else | |
3154 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3155 | } | |
3156 | } | |
32513b40 BF |
3157 | if (open->op_file) |
3158 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3159 | if (open->op_stp) |
ef79859e | 3160 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3161 | } |
3162 | ||
9b2ef62b BF |
3163 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
3164 | { | |
3165 | struct nfs4_client *found; | |
3166 | ||
3167 | if (STALE_CLIENTID(clid, nn)) | |
3168 | return nfserr_stale_clientid; | |
3169 | found = find_confirmed_client(clid, session, nn); | |
3170 | if (clp) | |
3171 | *clp = found; | |
3172 | return found ? nfs_ok : nfserr_expired; | |
3173 | } | |
3174 | ||
b37ad28b | 3175 | __be32 |
b591480b BF |
3176 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3177 | clientid_t *clid) | |
1da177e4 LT |
3178 | { |
3179 | struct nfs4_client *clp; | |
b37ad28b | 3180 | __be32 status; |
7f2210fa | 3181 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3182 | |
3183 | nfs4_lock_state(); | |
3184 | dprintk("process_renew(%08x/%08x): starting\n", | |
3185 | clid->cl_boot, clid->cl_id); | |
9b2ef62b BF |
3186 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
3187 | if (status) | |
1da177e4 | 3188 | goto out; |
1da177e4 | 3189 | status = nfserr_cb_path_down; |
ea1da636 | 3190 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3191 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3192 | goto out; |
3193 | status = nfs_ok; | |
3194 | out: | |
3195 | nfs4_unlock_state(); | |
3196 | return status; | |
3197 | } | |
3198 | ||
a76b4319 | 3199 | static void |
12760c66 | 3200 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3201 | { |
33dcc481 | 3202 | /* do nothing if grace period already ended */ |
a51c84ed | 3203 | if (nn->grace_ended) |
33dcc481 JL |
3204 | return; |
3205 | ||
a76b4319 | 3206 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3207 | nn->grace_ended = true; |
12760c66 | 3208 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3209 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3210 | /* |
3211 | * Now that every NFSv4 client has had the chance to recover and | |
3212 | * to see the (possibly new, possibly shorter) lease time, we | |
3213 | * can safely set the next grace time to the current lease time: | |
3214 | */ | |
5284b44e | 3215 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3216 | } |
3217 | ||
fd39ca9a | 3218 | static time_t |
09121281 | 3219 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3220 | { |
3221 | struct nfs4_client *clp; | |
fe0750e5 | 3222 | struct nfs4_openowner *oo; |
1da177e4 LT |
3223 | struct nfs4_delegation *dp; |
3224 | struct list_head *pos, *next, reaplist; | |
3d733711 SK |
3225 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
3226 | time_t t, clientid_val = nn->nfsd4_lease; | |
3227 | time_t u, test_val = nn->nfsd4_lease; | |
1da177e4 LT |
3228 | |
3229 | nfs4_lock_state(); | |
3230 | ||
3231 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3232 | nfsd4_end_grace(nn); |
36acb66b | 3233 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3234 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3235 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3236 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3237 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3238 | t = clp->cl_time - cutoff; | |
3239 | if (clientid_val > t) | |
3240 | clientid_val = t; | |
3241 | break; | |
3242 | } | |
221a6876 | 3243 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3244 | dprintk("NFSD: client in use (clientid %08x)\n", |
3245 | clp->cl_clientid.cl_id); | |
3246 | continue; | |
3247 | } | |
221a6876 | 3248 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3249 | } |
c9a49628 | 3250 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3251 | list_for_each_safe(pos, next, &reaplist) { |
3252 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3253 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3254 | clp->cl_clientid.cl_id); | |
3255 | expire_client(clp); | |
3256 | } | |
1da177e4 | 3257 | spin_lock(&recall_lock); |
e8c69d17 | 3258 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3259 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3260 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3261 | continue; | |
1da177e4 LT |
3262 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
3263 | u = dp->dl_time - cutoff; | |
3264 | if (test_val > u) | |
3265 | test_val = u; | |
3266 | break; | |
3267 | } | |
1da177e4 LT |
3268 | list_move(&dp->dl_recall_lru, &reaplist); |
3269 | } | |
3270 | spin_unlock(&recall_lock); | |
3271 | list_for_each_safe(pos, next, &reaplist) { | |
3272 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3273 | unhash_delegation(dp); |
3274 | } | |
3d733711 | 3275 | test_val = nn->nfsd4_lease; |
73758fed | 3276 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3277 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3278 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3279 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3280 | if (test_val > u) |
3281 | test_val = u; | |
3282 | break; | |
3283 | } | |
fe0750e5 | 3284 | release_openowner(oo); |
1da177e4 LT |
3285 | } |
3286 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3287 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3288 | nfs4_unlock_state(); | |
3289 | return clientid_val; | |
3290 | } | |
3291 | ||
a254b246 HH |
3292 | static struct workqueue_struct *laundry_wq; |
3293 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3294 | |
3295 | static void | |
09121281 | 3296 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3297 | { |
3298 | time_t t; | |
09121281 SK |
3299 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3300 | work); | |
3301 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3302 | laundromat_work); | |
1da177e4 | 3303 | |
09121281 | 3304 | t = nfs4_laundromat(nn); |
1da177e4 | 3305 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3306 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3307 | } |
3308 | ||
f7a4d872 | 3309 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3310 | { |
f7a4d872 BF |
3311 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3312 | return nfserr_bad_stateid; | |
3313 | return nfs_ok; | |
1da177e4 LT |
3314 | } |
3315 | ||
1da177e4 | 3316 | static inline int |
82c5ff1b | 3317 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3318 | { |
82c5ff1b JL |
3319 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3320 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3321 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3322 | } |
3323 | ||
3324 | static inline int | |
82c5ff1b | 3325 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3326 | { |
82c5ff1b JL |
3327 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3328 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3329 | } |
3330 | ||
3331 | static | |
dcef0413 | 3332 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3333 | { |
b37ad28b | 3334 | __be32 status = nfserr_openmode; |
1da177e4 | 3335 | |
02921914 BF |
3336 | /* For lock stateid's, we test the parent open, not the lock: */ |
3337 | if (stp->st_openstp) | |
3338 | stp = stp->st_openstp; | |
82c5ff1b | 3339 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3340 | goto out; |
82c5ff1b | 3341 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3342 | goto out; |
3343 | status = nfs_ok; | |
3344 | out: | |
3345 | return status; | |
3346 | } | |
3347 | ||
b37ad28b | 3348 | static inline __be32 |
5ccb0066 | 3349 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3350 | { |
203a8c8e | 3351 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3352 | return nfs_ok; |
5ccb0066 | 3353 | else if (locks_in_grace(net)) { |
25985edc | 3354 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3355 | * conflicting state; so we must wait out the grace period. */ |
3356 | return nfserr_grace; | |
3357 | } else if (flags & WR_STATE) | |
3358 | return nfs4_share_conflict(current_fh, | |
3359 | NFS4_SHARE_DENY_WRITE); | |
3360 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3361 | return nfs4_share_conflict(current_fh, | |
3362 | NFS4_SHARE_DENY_READ); | |
3363 | } | |
3364 | ||
3365 | /* | |
3366 | * Allow READ/WRITE during grace period on recovered state only for files | |
3367 | * that are not able to provide mandatory locking. | |
3368 | */ | |
3369 | static inline int | |
5ccb0066 | 3370 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3371 | { |
5ccb0066 | 3372 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3373 | } |
3374 | ||
81b82965 BF |
3375 | /* Returns true iff a is later than b: */ |
3376 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3377 | { | |
3378 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3379 | } | |
3380 | ||
57b7b43b | 3381 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3382 | { |
6668958f AA |
3383 | /* |
3384 | * When sessions are used the stateid generation number is ignored | |
3385 | * when it is zero. | |
3386 | */ | |
28dde241 | 3387 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3388 | return nfs_ok; |
3389 | ||
3390 | if (in->si_generation == ref->si_generation) | |
3391 | return nfs_ok; | |
6668958f | 3392 | |
0836f587 | 3393 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3394 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3395 | return nfserr_bad_stateid; |
3396 | /* | |
81b82965 BF |
3397 | * However, we could see a stateid from the past, even from a |
3398 | * non-buggy client. For example, if the client sends a lock | |
3399 | * while some IO is outstanding, the lock may bump si_generation | |
3400 | * while the IO is still in flight. The client could avoid that | |
3401 | * situation by waiting for responses on all the IO requests, | |
3402 | * but better performance may result in retrying IO that | |
3403 | * receives an old_stateid error if requests are rarely | |
3404 | * reordered in flight: | |
0836f587 | 3405 | */ |
81b82965 | 3406 | return nfserr_old_stateid; |
0836f587 BF |
3407 | } |
3408 | ||
7df302f7 | 3409 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3410 | { |
97b7e3b6 BF |
3411 | struct nfs4_stid *s; |
3412 | struct nfs4_ol_stateid *ols; | |
3413 | __be32 status; | |
17456804 | 3414 | |
7df302f7 CL |
3415 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3416 | return nfserr_bad_stateid; | |
3417 | /* Client debugging aid. */ | |
3418 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3419 | char addr_str[INET6_ADDRSTRLEN]; | |
3420 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3421 | sizeof(addr_str)); | |
3422 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3423 | "with incorrect client ID\n", addr_str); | |
3424 | return nfserr_bad_stateid; | |
3425 | } | |
38c2f4b1 | 3426 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3427 | if (!s) |
7df302f7 | 3428 | return nfserr_bad_stateid; |
36279ac1 | 3429 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3430 | if (status) |
97b7e3b6 BF |
3431 | return status; |
3432 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3433 | return nfs_ok; | |
3434 | ols = openlockstateid(s); | |
3435 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3436 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3437 | return nfserr_bad_stateid; |
3438 | return nfs_ok; | |
17456804 BS |
3439 | } |
3440 | ||
3320fef1 SK |
3441 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
3442 | struct nfs4_stid **s, bool sessions, | |
3443 | struct nfsd_net *nn) | |
38c2f4b1 BF |
3444 | { |
3445 | struct nfs4_client *cl; | |
0eb6f20a | 3446 | __be32 status; |
38c2f4b1 BF |
3447 | |
3448 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3449 | return nfserr_bad_stateid; | |
0eb6f20a BF |
3450 | status = lookup_clientid(&stateid->si_opaque.so_clid, sessions, |
3451 | nn, &cl); | |
3452 | if (status == nfserr_stale_clientid) | |
38c2f4b1 | 3453 | return nfserr_stale_stateid; |
0eb6f20a BF |
3454 | if (status) |
3455 | return status; | |
38c2f4b1 BF |
3456 | *s = find_stateid_by_type(cl, stateid, typemask); |
3457 | if (!*s) | |
3458 | return nfserr_bad_stateid; | |
3459 | return nfs_ok; | |
38c2f4b1 BF |
3460 | } |
3461 | ||
1da177e4 LT |
3462 | /* |
3463 | * Checks for stateid operations | |
3464 | */ | |
b37ad28b | 3465 | __be32 |
5ccb0066 | 3466 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3467 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3468 | { |
69064a27 | 3469 | struct nfs4_stid *s; |
dcef0413 | 3470 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3471 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3472 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3473 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3474 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b37ad28b | 3475 | __be32 status; |
1da177e4 | 3476 | |
1da177e4 LT |
3477 | if (filpp) |
3478 | *filpp = NULL; | |
3479 | ||
5ccb0066 | 3480 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3481 | return nfserr_grace; |
3482 | ||
3483 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3484 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3485 | |
3320fef1 SK |
3486 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
3487 | &s, cstate->minorversion, nn); | |
38c2f4b1 BF |
3488 | if (status) |
3489 | return status; | |
69064a27 BF |
3490 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3491 | if (status) | |
3492 | goto out; | |
f7a4d872 BF |
3493 | switch (s->sc_type) { |
3494 | case NFS4_DELEG_STID: | |
69064a27 | 3495 | dp = delegstateid(s); |
dc9bf700 BF |
3496 | status = nfs4_check_delegmode(dp, flags); |
3497 | if (status) | |
3498 | goto out; | |
43b0178e | 3499 | if (filpp) { |
acfdf5c3 | 3500 | *filpp = dp->dl_file->fi_deleg_file; |
063b0fb9 BF |
3501 | if (!*filpp) { |
3502 | WARN_ON_ONCE(1); | |
3503 | status = nfserr_serverfault; | |
3504 | goto out; | |
3505 | } | |
43b0178e | 3506 | } |
f7a4d872 BF |
3507 | break; |
3508 | case NFS4_OPEN_STID: | |
3509 | case NFS4_LOCK_STID: | |
69064a27 | 3510 | stp = openlockstateid(s); |
f7a4d872 BF |
3511 | status = nfs4_check_fh(current_fh, stp); |
3512 | if (status) | |
1da177e4 | 3513 | goto out; |
fe0750e5 | 3514 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3515 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3516 | goto out; |
a4455be0 BF |
3517 | status = nfs4_check_openmode(stp, flags); |
3518 | if (status) | |
1da177e4 | 3519 | goto out; |
f9d7562f BF |
3520 | if (filpp) { |
3521 | if (flags & RD_STATE) | |
3522 | *filpp = find_readable_file(stp->st_file); | |
3523 | else | |
3524 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3525 | } |
f7a4d872 BF |
3526 | break; |
3527 | default: | |
3528 | return nfserr_bad_stateid; | |
1da177e4 LT |
3529 | } |
3530 | status = nfs_ok; | |
3531 | out: | |
3532 | return status; | |
3533 | } | |
3534 | ||
e1ca12df | 3535 | static __be32 |
dcef0413 | 3536 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3537 | { |
fe0750e5 | 3538 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3539 | return nfserr_locks_held; |
3540 | release_lock_stateid(stp); | |
3541 | return nfs_ok; | |
3542 | } | |
3543 | ||
17456804 BS |
3544 | /* |
3545 | * Test if the stateid is valid | |
3546 | */ | |
3547 | __be32 | |
3548 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3549 | struct nfsd4_test_stateid *test_stateid) | |
3550 | { | |
03cfb420 BS |
3551 | struct nfsd4_test_stateid_id *stateid; |
3552 | struct nfs4_client *cl = cstate->session->se_client; | |
3553 | ||
3554 | nfs4_lock_state(); | |
3555 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3556 | stateid->ts_id_status = |
3557 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3558 | nfs4_unlock_state(); |
3559 | ||
17456804 BS |
3560 | return nfs_ok; |
3561 | } | |
3562 | ||
e1ca12df BS |
3563 | __be32 |
3564 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3565 | struct nfsd4_free_stateid *free_stateid) | |
3566 | { | |
3567 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3568 | struct nfs4_stid *s; |
38c2f4b1 | 3569 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3570 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3571 | |
3572 | nfs4_lock_state(); | |
38c2f4b1 | 3573 | s = find_stateid(cl, stateid); |
2da1cec7 | 3574 | if (!s) |
81b82965 | 3575 | goto out; |
2da1cec7 BF |
3576 | switch (s->sc_type) { |
3577 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3578 | ret = nfserr_locks_held; |
3579 | goto out; | |
2da1cec7 BF |
3580 | case NFS4_OPEN_STID: |
3581 | case NFS4_LOCK_STID: | |
3582 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3583 | if (ret) | |
3584 | goto out; | |
3585 | if (s->sc_type == NFS4_LOCK_STID) | |
3586 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3587 | else | |
3588 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3589 | break; |
3590 | default: | |
3591 | ret = nfserr_bad_stateid; | |
e1ca12df | 3592 | } |
e1ca12df BS |
3593 | out: |
3594 | nfs4_unlock_state(); | |
3595 | return ret; | |
3596 | } | |
3597 | ||
4c4cd222 N |
3598 | static inline int |
3599 | setlkflg (int type) | |
3600 | { | |
3601 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3602 | RD_STATE : WR_STATE; | |
3603 | } | |
1da177e4 | 3604 | |
dcef0413 | 3605 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3606 | { |
3607 | struct svc_fh *current_fh = &cstate->current_fh; | |
3608 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3609 | __be32 status; | |
3610 | ||
c0a5d93e BF |
3611 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3612 | if (status) | |
3613 | return status; | |
f7a4d872 BF |
3614 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3615 | /* | |
3616 | * "Closed" stateid's exist *only* to return | |
3617 | * nfserr_replay_me from the previous step. | |
3618 | */ | |
3619 | return nfserr_bad_stateid; | |
3620 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3621 | if (status) | |
3622 | return status; | |
3623 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3624 | } |
3625 | ||
1da177e4 LT |
3626 | /* |
3627 | * Checks for sequence id mutating operations. | |
3628 | */ | |
b37ad28b | 3629 | static __be32 |
dd453dfd | 3630 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3631 | stateid_t *stateid, char typemask, |
3320fef1 SK |
3632 | struct nfs4_ol_stateid **stpp, |
3633 | struct nfsd_net *nn) | |
1da177e4 | 3634 | { |
0836f587 | 3635 | __be32 status; |
38c2f4b1 | 3636 | struct nfs4_stid *s; |
1da177e4 | 3637 | |
8c10cbdb BH |
3638 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3639 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3640 | |
1da177e4 | 3641 | *stpp = NULL; |
3320fef1 SK |
3642 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
3643 | cstate->minorversion, nn); | |
c0a5d93e BF |
3644 | if (status) |
3645 | return status; | |
38c2f4b1 | 3646 | *stpp = openlockstateid(s); |
c0a5d93e | 3647 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3648 | |
c0a5d93e BF |
3649 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3650 | } | |
39325bd0 | 3651 | |
3320fef1 SK |
3652 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3653 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
3654 | { |
3655 | __be32 status; | |
3656 | struct nfs4_openowner *oo; | |
1da177e4 | 3657 | |
c0a5d93e | 3658 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 3659 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
3660 | if (status) |
3661 | return status; | |
c0a5d93e | 3662 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3663 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3664 | return nfserr_bad_stateid; |
3a4f98bb | 3665 | return nfs_ok; |
1da177e4 LT |
3666 | } |
3667 | ||
b37ad28b | 3668 | __be32 |
ca364317 | 3669 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3670 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3671 | { |
b37ad28b | 3672 | __be32 status; |
fe0750e5 | 3673 | struct nfs4_openowner *oo; |
dcef0413 | 3674 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3675 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3676 | |
3677 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3678 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3679 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3680 | |
ca364317 | 3681 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3682 | if (status) |
3683 | return status; | |
1da177e4 LT |
3684 | |
3685 | nfs4_lock_state(); | |
3686 | ||
9072d5c6 | 3687 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3688 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 3689 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 3690 | if (status) |
68b66e82 | 3691 | goto out; |
fe0750e5 | 3692 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3693 | status = nfserr_bad_stateid; |
dad1c067 | 3694 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3695 | goto out; |
dad1c067 | 3696 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3697 | update_stateid(&stp->st_stid.sc_stateid); |
3698 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3699 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3700 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3701 | |
2a4317c5 | 3702 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3703 | status = nfs_ok; |
1da177e4 | 3704 | out: |
5ec094c1 BF |
3705 | if (!cstate->replay_owner) |
3706 | nfs4_unlock_state(); | |
1da177e4 LT |
3707 | return status; |
3708 | } | |
3709 | ||
6409a5a6 | 3710 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3711 | { |
82c5ff1b | 3712 | if (!test_access(access, stp)) |
6409a5a6 BF |
3713 | return; |
3714 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3715 | clear_access(access, stp); |
6409a5a6 | 3716 | } |
f197c271 | 3717 | |
6409a5a6 BF |
3718 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3719 | { | |
3720 | switch (to_access) { | |
3721 | case NFS4_SHARE_ACCESS_READ: | |
3722 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3723 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3724 | break; | |
3725 | case NFS4_SHARE_ACCESS_WRITE: | |
3726 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3727 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3728 | break; | |
3729 | case NFS4_SHARE_ACCESS_BOTH: | |
3730 | break; | |
3731 | default: | |
063b0fb9 | 3732 | WARN_ON_ONCE(1); |
1da177e4 LT |
3733 | } |
3734 | } | |
3735 | ||
3736 | static void | |
ce0fc43c | 3737 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3738 | { |
3739 | int i; | |
3740 | for (i = 0; i < 4; i++) { | |
3741 | if ((i & deny) != i) | |
ce0fc43c | 3742 | clear_deny(i, stp); |
1da177e4 LT |
3743 | } |
3744 | } | |
3745 | ||
b37ad28b | 3746 | __be32 |
ca364317 BF |
3747 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3748 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3749 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3750 | { |
b37ad28b | 3751 | __be32 status; |
dcef0413 | 3752 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3753 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3754 | |
3755 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3756 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3757 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3758 | |
c30e92df | 3759 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3760 | if (od->od_deleg_want) |
3761 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3762 | od->od_deleg_want); | |
1da177e4 LT |
3763 | |
3764 | nfs4_lock_state(); | |
c0a5d93e | 3765 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 3766 | &od->od_stateid, &stp, nn); |
9072d5c6 | 3767 | if (status) |
1da177e4 | 3768 | goto out; |
1da177e4 | 3769 | status = nfserr_inval; |
82c5ff1b JL |
3770 | if (!test_access(od->od_share_access, stp)) { |
3771 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3772 | stp->st_access_bmap, od->od_share_access); |
3773 | goto out; | |
3774 | } | |
ce0fc43c | 3775 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3776 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3777 | stp->st_deny_bmap, od->od_share_deny); | |
3778 | goto out; | |
3779 | } | |
6409a5a6 | 3780 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3781 | |
ce0fc43c | 3782 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3783 | |
dcef0413 BF |
3784 | update_stateid(&stp->st_stid.sc_stateid); |
3785 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3786 | status = nfs_ok; |
3787 | out: | |
5ec094c1 BF |
3788 | if (!cstate->replay_owner) |
3789 | nfs4_unlock_state(); | |
1da177e4 LT |
3790 | return status; |
3791 | } | |
3792 | ||
38c387b5 BF |
3793 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3794 | { | |
3795 | struct nfs4_openowner *oo; | |
3796 | struct nfs4_ol_stateid *s; | |
3797 | ||
3798 | if (!so->so_is_open_owner) | |
3799 | return; | |
3800 | oo = openowner(so); | |
3801 | s = oo->oo_last_closed_stid; | |
3802 | if (!s) | |
3803 | return; | |
3804 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3805 | /* Release the last_closed_stid on the next seqid bump: */ | |
3806 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3807 | return; | |
3808 | } | |
3809 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3810 | release_last_closed_stateid(oo); |
3811 | } | |
3812 | ||
3813 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3814 | { | |
3815 | unhash_open_stateid(s); | |
3816 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3817 | } |
3818 | ||
1da177e4 LT |
3819 | /* |
3820 | * nfs4_unlock_state() called after encode | |
3821 | */ | |
b37ad28b | 3822 | __be32 |
ca364317 | 3823 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3824 | struct nfsd4_close *close) |
1da177e4 | 3825 | { |
b37ad28b | 3826 | __be32 status; |
fe0750e5 | 3827 | struct nfs4_openowner *oo; |
dcef0413 | 3828 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
3829 | struct net *net = SVC_NET(rqstp); |
3830 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
3831 | |
3832 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3833 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3834 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3835 | |
3836 | nfs4_lock_state(); | |
f7a4d872 BF |
3837 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3838 | &close->cl_stateid, | |
3839 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 3840 | &stp, nn); |
9072d5c6 | 3841 | if (status) |
1da177e4 | 3842 | goto out; |
fe0750e5 | 3843 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3844 | status = nfs_ok; |
dcef0413 BF |
3845 | update_stateid(&stp->st_stid.sc_stateid); |
3846 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3847 | |
f7a4d872 | 3848 | nfsd4_close_open_stateid(stp); |
cf9182e9 | 3849 | release_last_closed_stateid(oo); |
491402a7 | 3850 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; |
38c387b5 | 3851 | oo->oo_last_closed_stid = stp; |
04ef5954 | 3852 | |
74dbafaf BF |
3853 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3854 | if (cstate->minorversion) { | |
3855 | release_openowner(oo); | |
3856 | cstate->replay_owner = NULL; | |
3857 | } else { | |
3858 | /* | |
3859 | * In the 4.0 case we need to keep the owners around a | |
3860 | * little while to handle CLOSE replay. | |
3861 | */ | |
3862 | if (list_empty(&oo->oo_owner.so_stateids)) | |
73758fed | 3863 | move_to_close_lru(oo, SVC_NET(rqstp)); |
74dbafaf BF |
3864 | } |
3865 | } | |
1da177e4 | 3866 | out: |
5ec094c1 BF |
3867 | if (!cstate->replay_owner) |
3868 | nfs4_unlock_state(); | |
1da177e4 LT |
3869 | return status; |
3870 | } | |
3871 | ||
b37ad28b | 3872 | __be32 |
ca364317 BF |
3873 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3874 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3875 | { |
203a8c8e BF |
3876 | struct nfs4_delegation *dp; |
3877 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3878 | struct nfs4_stid *s; |
b37ad28b | 3879 | __be32 status; |
3320fef1 | 3880 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3881 | |
ca364317 | 3882 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 3883 | return status; |
1da177e4 LT |
3884 | |
3885 | nfs4_lock_state(); | |
3320fef1 SK |
3886 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
3887 | cstate->minorversion, nn); | |
38c2f4b1 | 3888 | if (status) |
203a8c8e | 3889 | goto out; |
38c2f4b1 | 3890 | dp = delegstateid(s); |
d5477a8d | 3891 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3892 | if (status) |
3893 | goto out; | |
203a8c8e BF |
3894 | |
3895 | unhash_delegation(dp); | |
1da177e4 | 3896 | out: |
203a8c8e BF |
3897 | nfs4_unlock_state(); |
3898 | ||
1da177e4 LT |
3899 | return status; |
3900 | } | |
3901 | ||
3902 | ||
1da177e4 | 3903 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3904 | |
009673b4 | 3905 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
1da177e4 | 3906 | |
87df4de8 BH |
3907 | static inline u64 |
3908 | end_offset(u64 start, u64 len) | |
3909 | { | |
3910 | u64 end; | |
3911 | ||
3912 | end = start + len; | |
3913 | return end >= start ? end: NFS4_MAX_UINT64; | |
3914 | } | |
3915 | ||
3916 | /* last octet in a range */ | |
3917 | static inline u64 | |
3918 | last_byte_offset(u64 start, u64 len) | |
3919 | { | |
3920 | u64 end; | |
3921 | ||
063b0fb9 | 3922 | WARN_ON_ONCE(!len); |
87df4de8 BH |
3923 | end = start + len; |
3924 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3925 | } | |
3926 | ||
009673b4 | 3927 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3928 | { |
3929 | return (file_hashval(inode) + cl_id | |
3930 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3931 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3932 | } |
3933 | ||
1da177e4 LT |
3934 | /* |
3935 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3936 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3937 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3938 | * locking, this prevents us from being completely protocol-compliant. The | |
3939 | * real solution to this problem is to start using unsigned file offsets in | |
3940 | * the VFS, but this is a very deep change! | |
3941 | */ | |
3942 | static inline void | |
3943 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3944 | { | |
3945 | if (lock->fl_start < 0) | |
3946 | lock->fl_start = OFFSET_MAX; | |
3947 | if (lock->fl_end < 0) | |
3948 | lock->fl_end = OFFSET_MAX; | |
3949 | } | |
3950 | ||
d5b9026a N |
3951 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3952 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3953 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3954 | }; |
1da177e4 LT |
3955 | |
3956 | static inline void | |
3957 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3958 | { | |
fe0750e5 | 3959 | struct nfs4_lockowner *lo; |
1da177e4 | 3960 | |
d5b9026a | 3961 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3962 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3963 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3964 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3965 | if (!deny->ld_owner.data) |
3966 | /* We just don't care that much */ | |
3967 | goto nevermind; | |
fe0750e5 BF |
3968 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3969 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3970 | } else { |
7c13f344 BF |
3971 | nevermind: |
3972 | deny->ld_owner.len = 0; | |
3973 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3974 | deny->ld_clientid.cl_boot = 0; |
3975 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3976 | } |
3977 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3978 | deny->ld_length = NFS4_MAX_UINT64; |
3979 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3980 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3981 | deny->ld_type = NFS4_READ_LT; | |
3982 | if (fl->fl_type != F_RDLCK) | |
3983 | deny->ld_type = NFS4_WRITE_LT; | |
3984 | } | |
3985 | ||
b93d87c1 BF |
3986 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3987 | { | |
3988 | struct nfs4_ol_stateid *lst; | |
3989 | ||
3990 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3991 | return false; | |
3992 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3993 | struct nfs4_ol_stateid, st_perstateowner); | |
3994 | return lst->st_file->fi_inode == inode; | |
3995 | } | |
3996 | ||
fe0750e5 BF |
3997 | static struct nfs4_lockowner * |
3998 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
20e9e2bc | 3999 | struct xdr_netobj *owner, struct nfsd_net *nn) |
1da177e4 | 4000 | { |
009673b4 | 4001 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 4002 | struct nfs4_lockowner *lo; |
1da177e4 | 4003 | |
20e9e2bc | 4004 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
4005 | if (same_lockowner_ino(lo, inode, clid, owner)) |
4006 | return lo; | |
1da177e4 LT |
4007 | } |
4008 | return NULL; | |
4009 | } | |
4010 | ||
dcef0413 | 4011 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 4012 | { |
009673b4 BF |
4013 | struct inode *inode = open_stp->st_file->fi_inode; |
4014 | unsigned int inohash = lockowner_ino_hashval(inode, | |
4015 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
9b531137 | 4016 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
009673b4 | 4017 | |
9b531137 | 4018 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
20e9e2bc | 4019 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 4020 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
4021 | } |
4022 | ||
1da177e4 LT |
4023 | /* |
4024 | * Alloc a lock owner structure. | |
4025 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4026 | * occurred. |
1da177e4 | 4027 | * |
16bfdaaf | 4028 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4029 | */ |
4030 | ||
fe0750e5 | 4031 | static struct nfs4_lockowner * |
dcef0413 | 4032 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4033 | struct nfs4_lockowner *lo; |
1da177e4 | 4034 | |
fe0750e5 BF |
4035 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4036 | if (!lo) | |
1da177e4 | 4037 | return NULL; |
fe0750e5 BF |
4038 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4039 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4040 | /* It is the openowner seqid that will be incremented in encode in the |
4041 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4042 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4043 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4044 | return lo; | |
1da177e4 LT |
4045 | } |
4046 | ||
dcef0413 BF |
4047 | static struct nfs4_ol_stateid * |
4048 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4049 | { |
dcef0413 | 4050 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4051 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4052 | |
996e0938 | 4053 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4054 | if (stp == NULL) |
6136d2b4 | 4055 | return NULL; |
3abdb607 | 4056 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4057 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4058 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4059 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4060 | get_nfs4_file(fp); |
1da177e4 | 4061 | stp->st_file = fp; |
0997b173 | 4062 | stp->st_access_bmap = 0; |
1da177e4 | 4063 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4064 | stp->st_openstp = open_stp; |
1da177e4 LT |
4065 | return stp; |
4066 | } | |
4067 | ||
fd39ca9a | 4068 | static int |
1da177e4 LT |
4069 | check_lock_length(u64 offset, u64 length) |
4070 | { | |
87df4de8 | 4071 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4072 | LOFF_OVERFLOW(offset, length))); |
4073 | } | |
4074 | ||
dcef0413 | 4075 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4076 | { |
4077 | struct nfs4_file *fp = lock_stp->st_file; | |
4078 | int oflag = nfs4_access_to_omode(access); | |
4079 | ||
82c5ff1b | 4080 | if (test_access(access, lock_stp)) |
0997b173 BF |
4081 | return; |
4082 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4083 | set_access(access, lock_stp); |
0997b173 BF |
4084 | } |
4085 | ||
2355c596 | 4086 | 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 |
4087 | { |
4088 | struct nfs4_file *fi = ost->st_file; | |
4089 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4090 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4091 | struct nfs4_lockowner *lo; | |
4092 | unsigned int strhashval; | |
20e9e2bc | 4093 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4094 | |
20e9e2bc SK |
4095 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
4096 | &lock->v.new.owner, nn); | |
64a284d0 BF |
4097 | if (lo) { |
4098 | if (!cstate->minorversion) | |
4099 | return nfserr_bad_seqid; | |
4100 | /* XXX: a lockowner always has exactly one stateid: */ | |
4101 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4102 | struct nfs4_ol_stateid, st_perstateowner); | |
4103 | return nfs_ok; | |
4104 | } | |
16bfdaaf | 4105 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4106 | &lock->v.new.owner); |
4107 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4108 | if (lo == NULL) | |
4109 | return nfserr_jukebox; | |
4110 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4111 | if (*lst == NULL) { | |
4112 | release_lockowner(lo); | |
4113 | return nfserr_jukebox; | |
4114 | } | |
4115 | *new = true; | |
4116 | return nfs_ok; | |
4117 | } | |
4118 | ||
1da177e4 LT |
4119 | /* |
4120 | * LOCK operation | |
4121 | */ | |
b37ad28b | 4122 | __be32 |
ca364317 | 4123 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4124 | struct nfsd4_lock *lock) |
1da177e4 | 4125 | { |
fe0750e5 BF |
4126 | struct nfs4_openowner *open_sop = NULL; |
4127 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4128 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4129 | struct file *filp = NULL; |
21179d81 JL |
4130 | struct file_lock *file_lock = NULL; |
4131 | struct file_lock *conflock = NULL; | |
b37ad28b | 4132 | __be32 status = 0; |
64a284d0 | 4133 | bool new_state = false; |
b34f27aa | 4134 | int lkflg; |
b8dd7b9a | 4135 | int err; |
3320fef1 SK |
4136 | struct net *net = SVC_NET(rqstp); |
4137 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4138 | |
4139 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4140 | (long long) lock->lk_offset, | |
4141 | (long long) lock->lk_length); | |
4142 | ||
1da177e4 LT |
4143 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4144 | return nfserr_inval; | |
4145 | ||
ca364317 | 4146 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4147 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4148 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4149 | return status; | |
4150 | } | |
4151 | ||
1da177e4 LT |
4152 | nfs4_lock_state(); |
4153 | ||
4154 | if (lock->lk_is_new) { | |
dcef0413 | 4155 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4156 | |
4157 | if (nfsd4_has_session(cstate)) | |
4158 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4159 | memcpy(&lock->v.new.clientid, | |
4160 | &cstate->session->se_client->cl_clientid, | |
4161 | sizeof(clientid_t)); | |
4162 | ||
1da177e4 | 4163 | status = nfserr_stale_clientid; |
2c142baa | 4164 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4165 | goto out; |
1da177e4 | 4166 | |
1da177e4 | 4167 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4168 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4169 | lock->lk_new_open_seqid, |
4170 | &lock->lk_new_open_stateid, | |
3320fef1 | 4171 | &open_stp, nn); |
37515177 | 4172 | if (status) |
1da177e4 | 4173 | goto out; |
fe0750e5 | 4174 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4175 | status = nfserr_bad_stateid; |
684e5638 | 4176 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4177 | &lock->v.new.clientid)) |
4178 | goto out; | |
64a284d0 BF |
4179 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4180 | &lock_stp, &new_state); | |
e1aaa891 | 4181 | } else |
dd453dfd | 4182 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4183 | lock->lk_old_lock_seqid, |
4184 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4185 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4186 | if (status) |
4187 | goto out; | |
64a284d0 | 4188 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4189 | |
b34f27aa BF |
4190 | lkflg = setlkflg(lock->lk_type); |
4191 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4192 | if (status) | |
4193 | goto out; | |
4194 | ||
0dd395dc | 4195 | status = nfserr_grace; |
3320fef1 | 4196 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4197 | goto out; |
4198 | status = nfserr_no_grace; | |
3320fef1 | 4199 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4200 | goto out; |
4201 | ||
21179d81 JL |
4202 | file_lock = locks_alloc_lock(); |
4203 | if (!file_lock) { | |
4204 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4205 | status = nfserr_jukebox; | |
4206 | goto out; | |
4207 | } | |
4208 | ||
4209 | locks_init_lock(file_lock); | |
1da177e4 LT |
4210 | switch (lock->lk_type) { |
4211 | case NFS4_READ_LT: | |
4212 | case NFS4_READW_LT: | |
0997b173 BF |
4213 | filp = find_readable_file(lock_stp->st_file); |
4214 | if (filp) | |
4215 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4216 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4217 | break; |
1da177e4 LT |
4218 | case NFS4_WRITE_LT: |
4219 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4220 | filp = find_writeable_file(lock_stp->st_file); |
4221 | if (filp) | |
4222 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4223 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4224 | break; |
1da177e4 LT |
4225 | default: |
4226 | status = nfserr_inval; | |
4227 | goto out; | |
4228 | } | |
f9d7562f BF |
4229 | if (!filp) { |
4230 | status = nfserr_openmode; | |
4231 | goto out; | |
4232 | } | |
21179d81 JL |
4233 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4234 | file_lock->fl_pid = current->tgid; | |
4235 | file_lock->fl_file = filp; | |
4236 | file_lock->fl_flags = FL_POSIX; | |
4237 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4238 | file_lock->fl_start = lock->lk_offset; | |
4239 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4240 | nfs4_transform_lock_offset(file_lock); | |
4241 | ||
4242 | conflock = locks_alloc_lock(); | |
4243 | if (!conflock) { | |
4244 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4245 | status = nfserr_jukebox; | |
4246 | goto out; | |
4247 | } | |
1da177e4 | 4248 | |
21179d81 | 4249 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4250 | switch (-err) { |
1da177e4 | 4251 | case 0: /* success! */ |
dcef0413 BF |
4252 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4253 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4254 | sizeof(stateid_t)); |
b8dd7b9a | 4255 | status = 0; |
eb76b3fd AA |
4256 | break; |
4257 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4258 | status = nfserr_denied; | |
4259 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4260 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4261 | break; |
1da177e4 LT |
4262 | case (EDEADLK): |
4263 | status = nfserr_deadlock; | |
eb76b3fd | 4264 | break; |
3e772463 | 4265 | default: |
fd85b817 | 4266 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4267 | status = nfserrno(err); |
eb76b3fd | 4268 | break; |
1da177e4 | 4269 | } |
1da177e4 | 4270 | out: |
64a284d0 | 4271 | if (status && new_state) |
f044ff83 | 4272 | release_lockowner(lock_sop); |
5ec094c1 BF |
4273 | if (!cstate->replay_owner) |
4274 | nfs4_unlock_state(); | |
21179d81 JL |
4275 | if (file_lock) |
4276 | locks_free_lock(file_lock); | |
4277 | if (conflock) | |
4278 | locks_free_lock(conflock); | |
1da177e4 LT |
4279 | return status; |
4280 | } | |
4281 | ||
55ef1274 BF |
4282 | /* |
4283 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4284 | * so we do a temporary open here just to get an open file to pass to | |
4285 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4286 | * inode operation.) | |
4287 | */ | |
04da6e9d | 4288 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4289 | { |
4290 | struct file *file; | |
04da6e9d AV |
4291 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4292 | if (!err) { | |
4293 | err = nfserrno(vfs_test_lock(file, lock)); | |
4294 | nfsd_close(file); | |
4295 | } | |
55ef1274 BF |
4296 | return err; |
4297 | } | |
4298 | ||
1da177e4 LT |
4299 | /* |
4300 | * LOCKT operation | |
4301 | */ | |
b37ad28b | 4302 | __be32 |
ca364317 BF |
4303 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4304 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4305 | { |
4306 | struct inode *inode; | |
21179d81 | 4307 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4308 | struct nfs4_lockowner *lo; |
b37ad28b | 4309 | __be32 status; |
7f2210fa | 4310 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4311 | |
5ccb0066 | 4312 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4313 | return nfserr_grace; |
4314 | ||
4315 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4316 | return nfserr_inval; | |
4317 | ||
1da177e4 LT |
4318 | nfs4_lock_state(); |
4319 | ||
9b2ef62b BF |
4320 | if (!nfsd4_has_session(cstate)) { |
4321 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); | |
4322 | if (status) | |
4323 | goto out; | |
4324 | } | |
1da177e4 | 4325 | |
75c096f7 | 4326 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4327 | goto out; |
1da177e4 | 4328 | |
ca364317 | 4329 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4330 | file_lock = locks_alloc_lock(); |
4331 | if (!file_lock) { | |
4332 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4333 | status = nfserr_jukebox; | |
4334 | goto out; | |
4335 | } | |
4336 | locks_init_lock(file_lock); | |
1da177e4 LT |
4337 | switch (lockt->lt_type) { |
4338 | case NFS4_READ_LT: | |
4339 | case NFS4_READW_LT: | |
21179d81 | 4340 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4341 | break; |
4342 | case NFS4_WRITE_LT: | |
4343 | case NFS4_WRITEW_LT: | |
21179d81 | 4344 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4345 | break; |
4346 | default: | |
2fdada03 | 4347 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4348 | status = nfserr_inval; |
4349 | goto out; | |
4350 | } | |
4351 | ||
20e9e2bc | 4352 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4353 | if (lo) |
21179d81 JL |
4354 | file_lock->fl_owner = (fl_owner_t)lo; |
4355 | file_lock->fl_pid = current->tgid; | |
4356 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4357 | |
21179d81 JL |
4358 | file_lock->fl_start = lockt->lt_offset; |
4359 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4360 | |
21179d81 | 4361 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4362 | |
21179d81 | 4363 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4364 | if (status) |
fd85b817 | 4365 | goto out; |
04da6e9d | 4366 | |
21179d81 | 4367 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4368 | status = nfserr_denied; |
21179d81 | 4369 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4370 | } |
4371 | out: | |
4372 | nfs4_unlock_state(); | |
21179d81 JL |
4373 | if (file_lock) |
4374 | locks_free_lock(file_lock); | |
1da177e4 LT |
4375 | return status; |
4376 | } | |
4377 | ||
b37ad28b | 4378 | __be32 |
ca364317 | 4379 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4380 | struct nfsd4_locku *locku) |
1da177e4 | 4381 | { |
dcef0413 | 4382 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4383 | struct file *filp = NULL; |
21179d81 | 4384 | struct file_lock *file_lock = NULL; |
b37ad28b | 4385 | __be32 status; |
b8dd7b9a | 4386 | int err; |
3320fef1 SK |
4387 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4388 | ||
1da177e4 LT |
4389 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4390 | (long long) locku->lu_offset, | |
4391 | (long long) locku->lu_length); | |
4392 | ||
4393 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4394 | return nfserr_inval; | |
4395 | ||
4396 | nfs4_lock_state(); | |
4397 | ||
9072d5c6 | 4398 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4399 | &locku->lu_stateid, NFS4_LOCK_STID, |
4400 | &stp, nn); | |
9072d5c6 | 4401 | if (status) |
1da177e4 | 4402 | goto out; |
f9d7562f BF |
4403 | filp = find_any_file(stp->st_file); |
4404 | if (!filp) { | |
4405 | status = nfserr_lock_range; | |
4406 | goto out; | |
4407 | } | |
21179d81 JL |
4408 | file_lock = locks_alloc_lock(); |
4409 | if (!file_lock) { | |
4410 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4411 | status = nfserr_jukebox; | |
4412 | goto out; | |
4413 | } | |
4414 | locks_init_lock(file_lock); | |
4415 | file_lock->fl_type = F_UNLCK; | |
4416 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); | |
4417 | file_lock->fl_pid = current->tgid; | |
4418 | file_lock->fl_file = filp; | |
4419 | file_lock->fl_flags = FL_POSIX; | |
4420 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4421 | file_lock->fl_start = locku->lu_offset; | |
4422 | ||
4423 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4424 | locku->lu_length); | |
4425 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 LT |
4426 | |
4427 | /* | |
4428 | * Try to unlock the file in the VFS. | |
4429 | */ | |
21179d81 | 4430 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4431 | if (err) { |
fd85b817 | 4432 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4433 | goto out_nfserr; |
4434 | } | |
4435 | /* | |
4436 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4437 | */ | |
dcef0413 BF |
4438 | update_stateid(&stp->st_stid.sc_stateid); |
4439 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4440 | |
4441 | out: | |
71c3bcd7 BF |
4442 | if (!cstate->replay_owner) |
4443 | nfs4_unlock_state(); | |
21179d81 JL |
4444 | if (file_lock) |
4445 | locks_free_lock(file_lock); | |
1da177e4 LT |
4446 | return status; |
4447 | ||
4448 | out_nfserr: | |
b8dd7b9a | 4449 | status = nfserrno(err); |
1da177e4 LT |
4450 | goto out; |
4451 | } | |
4452 | ||
4453 | /* | |
4454 | * returns | |
4455 | * 1: locks held by lockowner | |
4456 | * 0: no locks held by lockowner | |
4457 | */ | |
4458 | static int | |
fe0750e5 | 4459 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4460 | { |
4461 | struct file_lock **flpp; | |
f9d7562f | 4462 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4463 | int status = 0; |
4464 | ||
b89f4321 | 4465 | lock_flocks(); |
1da177e4 | 4466 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4467 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4468 | status = 1; |
4469 | goto out; | |
796dadfd | 4470 | } |
1da177e4 LT |
4471 | } |
4472 | out: | |
b89f4321 | 4473 | unlock_flocks(); |
1da177e4 LT |
4474 | return status; |
4475 | } | |
4476 | ||
b37ad28b | 4477 | __be32 |
b591480b BF |
4478 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4479 | struct nfsd4_compound_state *cstate, | |
4480 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4481 | { |
4482 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4483 | struct nfs4_stateowner *sop; |
fe0750e5 | 4484 | struct nfs4_lockowner *lo; |
dcef0413 | 4485 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4486 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4487 | struct list_head matches; |
16bfdaaf | 4488 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4489 | __be32 status; |
7f2210fa | 4490 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4491 | |
4492 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4493 | clid->cl_boot, clid->cl_id); | |
4494 | ||
1da177e4 LT |
4495 | nfs4_lock_state(); |
4496 | ||
9b2ef62b BF |
4497 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
4498 | if (status) | |
4499 | goto out; | |
4500 | ||
3e9e3dbe | 4501 | status = nfserr_locks_held; |
3e9e3dbe | 4502 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4503 | |
9b531137 | 4504 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
4505 | if (sop->so_is_open_owner) |
4506 | continue; | |
06f1f864 BF |
4507 | if (!same_owner_str(sop, owner, clid)) |
4508 | continue; | |
4509 | list_for_each_entry(stp, &sop->so_stateids, | |
4510 | st_perstateowner) { | |
4511 | lo = lockowner(sop); | |
4512 | if (check_for_locks(stp->st_file, lo)) | |
4513 | goto out; | |
4514 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4515 | } |
3e9e3dbe N |
4516 | } |
4517 | /* Clients probably won't expect us to return with some (but not all) | |
4518 | * of the lockowner state released; so don't release any until all | |
4519 | * have been checked. */ | |
4520 | status = nfs_ok; | |
0fa822e4 | 4521 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4522 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4523 | lo_list); | |
0fa822e4 N |
4524 | /* unhash_stateowner deletes so_perclient only |
4525 | * for openowners. */ | |
fe0750e5 BF |
4526 | list_del(&lo->lo_list); |
4527 | release_lockowner(lo); | |
1da177e4 LT |
4528 | } |
4529 | out: | |
4530 | nfs4_unlock_state(); | |
4531 | return status; | |
4532 | } | |
4533 | ||
4534 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4535 | alloc_reclaim(void) |
1da177e4 | 4536 | { |
a55370a3 | 4537 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4538 | } |
4539 | ||
0ce0c2b5 | 4540 | bool |
52e19c09 | 4541 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4542 | { |
0ce0c2b5 | 4543 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4544 | |
52e19c09 | 4545 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4546 | return (crp && crp->cr_clp); |
c7b9a459 N |
4547 | } |
4548 | ||
1da177e4 LT |
4549 | /* |
4550 | * failure => all reset bets are off, nfserr_no_grace... | |
4551 | */ | |
772a9bbb | 4552 | struct nfs4_client_reclaim * |
52e19c09 | 4553 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4554 | { |
4555 | unsigned int strhashval; | |
772a9bbb | 4556 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4557 | |
a55370a3 N |
4558 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4559 | crp = alloc_reclaim(); | |
772a9bbb JL |
4560 | if (crp) { |
4561 | strhashval = clientstr_hashval(name); | |
4562 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4563 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4564 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4565 | crp->cr_clp = NULL; |
52e19c09 | 4566 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4567 | } |
4568 | return crp; | |
1da177e4 LT |
4569 | } |
4570 | ||
ce30e539 | 4571 | void |
52e19c09 | 4572 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4573 | { |
4574 | list_del(&crp->cr_strhash); | |
4575 | kfree(crp); | |
52e19c09 | 4576 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4577 | } |
4578 | ||
2a4317c5 | 4579 | void |
52e19c09 | 4580 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4581 | { |
4582 | struct nfs4_client_reclaim *crp = NULL; | |
4583 | int i; | |
4584 | ||
1da177e4 | 4585 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4586 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4587 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4588 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4589 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4590 | } |
4591 | } | |
063b0fb9 | 4592 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4593 | } |
4594 | ||
4595 | /* | |
4596 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4597 | struct nfs4_client_reclaim * |
52e19c09 | 4598 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4599 | { |
4600 | unsigned int strhashval; | |
1da177e4 LT |
4601 | struct nfs4_client_reclaim *crp = NULL; |
4602 | ||
278c931c | 4603 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4604 | |
278c931c | 4605 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4606 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4607 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4608 | return crp; |
4609 | } | |
4610 | } | |
4611 | return NULL; | |
4612 | } | |
4613 | ||
4614 | /* | |
4615 | * Called from OPEN. Look for clientid in reclaim list. | |
4616 | */ | |
b37ad28b | 4617 | __be32 |
3320fef1 | 4618 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4619 | { |
a52d726b JL |
4620 | struct nfs4_client *clp; |
4621 | ||
4622 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4623 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4624 | if (clp == NULL) |
4625 | return nfserr_reclaim_bad; | |
4626 | ||
4627 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4628 | } |
4629 | ||
65178db4 BS |
4630 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4631 | ||
44e34da6 BS |
4632 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4633 | { | |
221a6876 BF |
4634 | if (mark_client_expired(clp)) |
4635 | return 0; | |
44e34da6 BS |
4636 | expire_client(clp); |
4637 | return 1; | |
4638 | } | |
4639 | ||
184c1847 BS |
4640 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4641 | { | |
4642 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4643 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4644 | printk(KERN_INFO "NFS Client: %s\n", buf); |
4645 | return 1; | |
4646 | } | |
4647 | ||
4648 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
4649 | const char *type) | |
4650 | { | |
4651 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4652 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4653 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
4654 | } | |
4655 | ||
fc29171f BS |
4656 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) |
4657 | { | |
4658 | struct nfs4_openowner *oop; | |
4659 | struct nfs4_lockowner *lop, *lo_next; | |
4660 | struct nfs4_ol_stateid *stp, *st_next; | |
4661 | u64 count = 0; | |
4662 | ||
4663 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
4664 | list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { | |
4665 | list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { | |
4666 | if (func) | |
4667 | func(lop); | |
4668 | if (++count == max) | |
4669 | return count; | |
4670 | } | |
4671 | } | |
4672 | } | |
4673 | ||
4674 | return count; | |
4675 | } | |
4676 | ||
4677 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
4678 | { | |
4679 | return nfsd_foreach_client_lock(clp, max, release_lockowner); | |
4680 | } | |
4681 | ||
184c1847 BS |
4682 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
4683 | { | |
4684 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
4685 | nfsd_print_count(clp, count, "locked files"); | |
4686 | return count; | |
4687 | } | |
4688 | ||
4dbdbda8 BS |
4689 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
4690 | { | |
4691 | struct nfs4_openowner *oop, *next; | |
4692 | u64 count = 0; | |
4693 | ||
4694 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
4695 | if (func) | |
4696 | func(oop); | |
4697 | if (++count == max) | |
4698 | break; | |
4699 | } | |
4700 | ||
4701 | return count; | |
4702 | } | |
4703 | ||
4704 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
4705 | { | |
4706 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
4707 | } | |
4708 | ||
184c1847 BS |
4709 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
4710 | { | |
4711 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
4712 | nfsd_print_count(clp, count, "open files"); | |
4713 | return count; | |
4714 | } | |
4715 | ||
269de30f BS |
4716 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
4717 | struct list_head *victims) | |
4718 | { | |
4719 | struct nfs4_delegation *dp, *next; | |
4720 | u64 count = 0; | |
4721 | ||
4722 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { | |
4723 | if (victims) | |
4724 | list_move(&dp->dl_recall_lru, victims); | |
4725 | if (++count == max) | |
4726 | break; | |
4727 | } | |
4728 | return count; | |
4729 | } | |
4730 | ||
4731 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
4732 | { | |
4733 | struct nfs4_delegation *dp, *next; | |
4734 | LIST_HEAD(victims); | |
4735 | u64 count; | |
4736 | ||
4737 | spin_lock(&recall_lock); | |
4738 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4739 | spin_unlock(&recall_lock); | |
4740 | ||
4741 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4742 | unhash_delegation(dp); | |
4743 | ||
4744 | return count; | |
4745 | } | |
4746 | ||
4747 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
4748 | { | |
4749 | struct nfs4_delegation *dp, *next; | |
4750 | LIST_HEAD(victims); | |
4751 | u64 count; | |
4752 | ||
4753 | spin_lock(&recall_lock); | |
4754 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4755 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4756 | nfsd_break_one_deleg(dp); | |
4757 | spin_unlock(&recall_lock); | |
4758 | ||
4759 | return count; | |
4760 | } | |
4761 | ||
184c1847 BS |
4762 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
4763 | { | |
4764 | u64 count = 0; | |
4765 | ||
4766 | spin_lock(&recall_lock); | |
4767 | count = nfsd_find_all_delegations(clp, max, NULL); | |
4768 | spin_unlock(&recall_lock); | |
4769 | ||
4770 | nfsd_print_count(clp, count, "delegations"); | |
4771 | return count; | |
4772 | } | |
4773 | ||
44e34da6 | 4774 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
4775 | { |
4776 | struct nfs4_client *clp, *next; | |
44e34da6 | 4777 | u64 count = 0; |
3320fef1 | 4778 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 4779 | |
44e34da6 BS |
4780 | if (!nfsd_netns_ready(nn)) |
4781 | return 0; | |
4782 | ||
5ed58bb2 | 4783 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
4784 | count += func(clp, max - count); |
4785 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
4786 | break; |
4787 | } | |
65178db4 | 4788 | |
44e34da6 BS |
4789 | return count; |
4790 | } | |
4791 | ||
6c1e82a4 BS |
4792 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
4793 | { | |
4794 | struct nfs4_client *clp; | |
4795 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
4796 | ||
4797 | if (!nfsd_netns_ready(nn)) | |
4798 | return NULL; | |
4799 | ||
4800 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
4801 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
4802 | return clp; | |
4803 | } | |
4804 | return NULL; | |
4805 | } | |
4806 | ||
65178db4 BS |
4807 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
4808 | ||
ac4d8ff2 | 4809 | /* initialization to perform at module load time: */ |
1da177e4 | 4810 | |
72083396 | 4811 | void |
ac4d8ff2 | 4812 | nfs4_state_init(void) |
1da177e4 | 4813 | { |
ac4d8ff2 N |
4814 | } |
4815 | ||
c2f1a551 MS |
4816 | /* |
4817 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4818 | * client may quite reasonably hang on to a delegation as long as it has | |
4819 | * the inode cached. This becomes an obvious problem the first time a | |
4820 | * client's inode cache approaches the size of the server's total memory. | |
4821 | * | |
4822 | * For now we avoid this problem by imposing a hard limit on the number | |
4823 | * of delegations, which varies according to the server's memory size. | |
4824 | */ | |
4825 | static void | |
4826 | set_max_delegations(void) | |
4827 | { | |
4828 | /* | |
4829 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4830 | * estimates suggest that in the worst case (where every delegation | |
4831 | * is for a different inode), a delegation could take about 1.5K, | |
4832 | * giving a worst case usage of about 6% of memory. | |
4833 | */ | |
4834 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4835 | } | |
4836 | ||
d85ed443 | 4837 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
4838 | { |
4839 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4840 | int i; | |
4841 | ||
4842 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
4843 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4844 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 4845 | goto err; |
0a7ec377 SK |
4846 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
4847 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4848 | if (!nn->unconf_id_hashtbl) | |
4849 | goto err_unconf_id; | |
9b531137 SK |
4850 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
4851 | OWNER_HASH_SIZE, GFP_KERNEL); | |
4852 | if (!nn->ownerstr_hashtbl) | |
4853 | goto err_ownerstr; | |
20e9e2bc SK |
4854 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
4855 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); | |
4856 | if (!nn->lockowner_ino_hashtbl) | |
4857 | goto err_lockowner_ino; | |
1872de0e SK |
4858 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
4859 | SESSION_HASH_SIZE, GFP_KERNEL); | |
4860 | if (!nn->sessionid_hashtbl) | |
4861 | goto err_sessionid; | |
8daae4dc | 4862 | |
382a62e7 | 4863 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 4864 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 4865 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 4866 | } |
9b531137 SK |
4867 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
4868 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
20e9e2bc SK |
4869 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4870 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); | |
1872de0e SK |
4871 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4872 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 4873 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 4874 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 4875 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 4876 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 4877 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 4878 | spin_lock_init(&nn->client_lock); |
8daae4dc | 4879 | |
09121281 | 4880 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 4881 | get_net(net); |
09121281 | 4882 | |
8daae4dc | 4883 | return 0; |
382a62e7 | 4884 | |
1872de0e SK |
4885 | err_sessionid: |
4886 | kfree(nn->lockowner_ino_hashtbl); | |
20e9e2bc SK |
4887 | err_lockowner_ino: |
4888 | kfree(nn->ownerstr_hashtbl); | |
9b531137 SK |
4889 | err_ownerstr: |
4890 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
4891 | err_unconf_id: |
4892 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
4893 | err: |
4894 | return -ENOMEM; | |
8daae4dc SK |
4895 | } |
4896 | ||
4897 | static void | |
4dce0ac9 | 4898 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
4899 | { |
4900 | int i; | |
4901 | struct nfs4_client *clp = NULL; | |
4902 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
a99454aa | 4903 | struct rb_node *node, *tmp; |
8daae4dc SK |
4904 | |
4905 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
4906 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
4907 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4908 | destroy_client(clp); | |
4909 | } | |
4910 | } | |
a99454aa SK |
4911 | |
4912 | node = rb_first(&nn->unconf_name_tree); | |
4913 | while (node != NULL) { | |
4914 | tmp = node; | |
4915 | node = rb_next(tmp); | |
4916 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
4917 | rb_erase(tmp, &nn->unconf_name_tree); | |
4918 | destroy_client(clp); | |
4919 | } | |
4920 | ||
1872de0e | 4921 | kfree(nn->sessionid_hashtbl); |
20e9e2bc | 4922 | kfree(nn->lockowner_ino_hashtbl); |
9b531137 | 4923 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 4924 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 4925 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 4926 | put_net(net); |
8daae4dc SK |
4927 | } |
4928 | ||
f252bc68 | 4929 | int |
d85ed443 | 4930 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 4931 | { |
5e1533c7 | 4932 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
4933 | int ret; |
4934 | ||
d85ed443 | 4935 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
4936 | if (ret) |
4937 | return ret; | |
5e1533c7 | 4938 | nfsd4_client_tracking_init(net); |
2c142baa | 4939 | nn->boot_time = get_seconds(); |
5ccb0066 | 4940 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 4941 | nn->grace_ended = false; |
d85ed443 | 4942 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
4943 | nn->nfsd4_grace, net); |
4944 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
4945 | return 0; |
4946 | } | |
4947 | ||
4948 | /* initialization to perform when the nfsd service is started: */ | |
4949 | ||
4950 | int | |
4951 | nfs4_state_start(void) | |
4952 | { | |
4953 | int ret; | |
4954 | ||
b5a1a81e | 4955 | ret = set_callback_cred(); |
d85ed443 SK |
4956 | if (ret) |
4957 | return -ENOMEM; | |
58da282b | 4958 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4959 | if (laundry_wq == NULL) { |
4960 | ret = -ENOMEM; | |
4961 | goto out_recovery; | |
4962 | } | |
b5a1a81e BF |
4963 | ret = nfsd4_create_callback_queue(); |
4964 | if (ret) | |
4965 | goto out_free_laundry; | |
09121281 | 4966 | |
c2f1a551 | 4967 | set_max_delegations(); |
d85ed443 | 4968 | |
b5a1a81e | 4969 | return 0; |
d85ed443 | 4970 | |
b5a1a81e BF |
4971 | out_free_laundry: |
4972 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4973 | out_recovery: |
b5a1a81e | 4974 | return ret; |
1da177e4 LT |
4975 | } |
4976 | ||
ac55fdc4 | 4977 | /* should be called with the state lock held */ |
f252bc68 | 4978 | void |
4dce0ac9 | 4979 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 4980 | { |
1da177e4 | 4981 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 4982 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 4983 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 4984 | |
4dce0ac9 SK |
4985 | cancel_delayed_work_sync(&nn->laundromat_work); |
4986 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 4987 | |
1da177e4 LT |
4988 | INIT_LIST_HEAD(&reaplist); |
4989 | spin_lock(&recall_lock); | |
e8c69d17 | 4990 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
4991 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4992 | list_move(&dp->dl_recall_lru, &reaplist); | |
4993 | } | |
4994 | spin_unlock(&recall_lock); | |
4995 | list_for_each_safe(pos, next, &reaplist) { | |
4996 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4997 | unhash_delegation(dp); |
4998 | } | |
4999 | ||
3320fef1 | 5000 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5001 | nfs4_state_destroy_net(net); |
1da177e4 LT |
5002 | } |
5003 | ||
5004 | void | |
5005 | nfs4_state_shutdown(void) | |
5006 | { | |
5e8d5c29 | 5007 | destroy_workqueue(laundry_wq); |
c3935e30 | 5008 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5009 | } |
8b70484c TM |
5010 | |
5011 | static void | |
5012 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5013 | { | |
37c593c5 TM |
5014 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5015 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5016 | } |
5017 | ||
5018 | static void | |
5019 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5020 | { | |
37c593c5 TM |
5021 | if (cstate->minorversion) { |
5022 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5023 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5024 | } | |
5025 | } | |
5026 | ||
5027 | void | |
5028 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5029 | { | |
5030 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5031 | } |
5032 | ||
62cd4a59 TM |
5033 | /* |
5034 | * functions to set current state id | |
5035 | */ | |
9428fe1a TM |
5036 | void |
5037 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5038 | { | |
5039 | put_stateid(cstate, &odp->od_stateid); | |
5040 | } | |
5041 | ||
8b70484c TM |
5042 | void |
5043 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5044 | { | |
5045 | put_stateid(cstate, &open->op_stateid); | |
5046 | } | |
5047 | ||
62cd4a59 TM |
5048 | void |
5049 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5050 | { | |
5051 | put_stateid(cstate, &close->cl_stateid); | |
5052 | } | |
5053 | ||
5054 | void | |
5055 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5056 | { | |
5057 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5058 | } | |
5059 | ||
5060 | /* | |
5061 | * functions to consume current state id | |
5062 | */ | |
1e97b519 | 5063 | |
9428fe1a TM |
5064 | void |
5065 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5066 | { | |
5067 | get_stateid(cstate, &odp->od_stateid); | |
5068 | } | |
5069 | ||
5070 | void | |
5071 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5072 | { | |
5073 | get_stateid(cstate, &drp->dr_stateid); | |
5074 | } | |
5075 | ||
1e97b519 TM |
5076 | void |
5077 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5078 | { | |
5079 | get_stateid(cstate, &fsp->fr_stateid); | |
5080 | } | |
5081 | ||
5082 | void | |
5083 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5084 | { | |
5085 | get_stateid(cstate, &setattr->sa_stateid); | |
5086 | } | |
5087 | ||
8b70484c TM |
5088 | void |
5089 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5090 | { | |
5091 | get_stateid(cstate, &close->cl_stateid); | |
5092 | } | |
5093 | ||
5094 | void | |
62cd4a59 | 5095 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5096 | { |
62cd4a59 | 5097 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5098 | } |
30813e27 TM |
5099 | |
5100 | void | |
5101 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5102 | { | |
5103 | get_stateid(cstate, &read->rd_stateid); | |
5104 | } | |
5105 | ||
5106 | void | |
5107 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5108 | { | |
5109 | get_stateid(cstate, &write->wr_stateid); | |
5110 | } |