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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" |
06b332a5 | 45 | #include "xdr4cb.h" |
0a3adade | 46 | #include "vfs.h" |
bfa4b365 | 47 | #include "current_stateid.h" |
1da177e4 | 48 | |
5e1533c7 SK |
49 | #include "netns.h" |
50 | ||
1da177e4 LT |
51 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
52 | ||
f32f3c2d BF |
53 | #define all_ones {{~0,~0},~0} |
54 | static const stateid_t one_stateid = { | |
55 | .si_generation = ~0, | |
56 | .si_opaque = all_ones, | |
57 | }; | |
58 | static const stateid_t zero_stateid = { | |
59 | /* all fields zero */ | |
60 | }; | |
19ff0f28 TM |
61 | static const stateid_t currentstateid = { |
62 | .si_generation = 1, | |
63 | }; | |
f32f3c2d | 64 | |
ec6b5d7b | 65 | static u64 current_sessionid = 1; |
fd39ca9a | 66 | |
f32f3c2d BF |
67 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
68 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 69 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 70 | |
1da177e4 | 71 | /* forward declarations */ |
fe0750e5 | 72 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 73 | |
8b671b80 BF |
74 | /* Locking: */ |
75 | ||
76 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 77 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 78 | |
8b671b80 BF |
79 | /* |
80 | * Currently used for the del_recall_lru and file hash table. In an | |
81 | * effort to decrease the scope of the client_mutex, this spinlock may | |
82 | * eventually cover more: | |
83 | */ | |
84 | static DEFINE_SPINLOCK(recall_lock); | |
85 | ||
fe0750e5 BF |
86 | static struct kmem_cache *openowner_slab = NULL; |
87 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
88 | static struct kmem_cache *file_slab = NULL; |
89 | static struct kmem_cache *stateid_slab = NULL; | |
90 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 91 | |
1da177e4 LT |
92 | void |
93 | nfs4_lock_state(void) | |
94 | { | |
353ab6e9 | 95 | mutex_lock(&client_mutex); |
1da177e4 LT |
96 | } |
97 | ||
66b2b9b2 | 98 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 99 | |
f0f51f5c | 100 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 101 | { |
f0f51f5c | 102 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
103 | } |
104 | ||
f0f51f5c | 105 | void nfsd4_put_session(struct nfsd4_session *ses) |
508dc6e1 | 106 | { |
f0f51f5c BF |
107 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) |
108 | free_session(ses); | |
66b2b9b2 BF |
109 | } |
110 | ||
f0f51f5c | 111 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 112 | { |
f0f51f5c | 113 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
114 | return nfserr_jukebox; |
115 | ses->se_flags |= NFS4_SESSION_DEAD; | |
116 | return nfs_ok; | |
508dc6e1 BH |
117 | } |
118 | ||
66b2b9b2 | 119 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
508dc6e1 | 120 | { |
66b2b9b2 BF |
121 | if (is_session_dead(ses)) |
122 | return nfserr_badsession; | |
123 | atomic_inc(&ses->se_ref); | |
124 | return nfs_ok; | |
508dc6e1 BH |
125 | } |
126 | ||
1da177e4 LT |
127 | void |
128 | nfs4_unlock_state(void) | |
129 | { | |
353ab6e9 | 130 | mutex_unlock(&client_mutex); |
1da177e4 LT |
131 | } |
132 | ||
221a6876 BF |
133 | static bool is_client_expired(struct nfs4_client *clp) |
134 | { | |
135 | return clp->cl_time == 0; | |
136 | } | |
137 | ||
138 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
139 | { | |
140 | if (atomic_read(&clp->cl_refcount)) | |
141 | return nfserr_jukebox; | |
142 | clp->cl_time = 0; | |
143 | return nfs_ok; | |
144 | } | |
145 | ||
146 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
147 | { | |
148 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
149 | __be32 ret; | |
150 | ||
151 | spin_lock(&nn->client_lock); | |
152 | ret = mark_client_expired_locked(clp); | |
153 | spin_unlock(&nn->client_lock); | |
154 | return ret; | |
155 | } | |
156 | ||
157 | static __be32 get_client_locked(struct nfs4_client *clp) | |
158 | { | |
159 | if (is_client_expired(clp)) | |
160 | return nfserr_expired; | |
161 | atomic_inc(&clp->cl_refcount); | |
162 | return nfs_ok; | |
163 | } | |
164 | ||
165 | /* must be called under the client_lock */ | |
166 | static inline void | |
167 | renew_client_locked(struct nfs4_client *clp) | |
168 | { | |
169 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
170 | ||
171 | if (is_client_expired(clp)) { | |
172 | WARN_ON(1); | |
173 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
174 | __func__, | |
175 | clp->cl_clientid.cl_boot, | |
176 | clp->cl_clientid.cl_id); | |
177 | return; | |
178 | } | |
179 | ||
180 | dprintk("renewing client (clientid %08x/%08x)\n", | |
181 | clp->cl_clientid.cl_boot, | |
182 | clp->cl_clientid.cl_id); | |
183 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
184 | clp->cl_time = get_seconds(); | |
185 | } | |
186 | ||
187 | static inline void | |
188 | renew_client(struct nfs4_client *clp) | |
189 | { | |
190 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
191 | ||
192 | spin_lock(&nn->client_lock); | |
193 | renew_client_locked(clp); | |
194 | spin_unlock(&nn->client_lock); | |
195 | } | |
196 | ||
ba138435 | 197 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
198 | { |
199 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
200 | return; | |
201 | if (!is_client_expired(clp)) | |
202 | renew_client_locked(clp); | |
203 | } | |
204 | ||
205 | void put_client_renew(struct nfs4_client *clp) | |
206 | { | |
207 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
208 | ||
209 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) | |
210 | return; | |
211 | if (!is_client_expired(clp)) | |
212 | renew_client_locked(clp); | |
213 | spin_unlock(&nn->client_lock); | |
214 | } | |
215 | ||
216 | ||
1da177e4 LT |
217 | static inline u32 |
218 | opaque_hashval(const void *ptr, int nbytes) | |
219 | { | |
220 | unsigned char *cptr = (unsigned char *) ptr; | |
221 | ||
222 | u32 x = 0; | |
223 | while (nbytes--) { | |
224 | x *= 37; | |
225 | x += *cptr++; | |
226 | } | |
227 | return x; | |
228 | } | |
229 | ||
32513b40 BF |
230 | static void nfsd4_free_file(struct nfs4_file *f) |
231 | { | |
232 | kmem_cache_free(file_slab, f); | |
233 | } | |
234 | ||
13cd2184 N |
235 | static inline void |
236 | put_nfs4_file(struct nfs4_file *fi) | |
237 | { | |
8b671b80 | 238 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
89876f8c | 239 | hlist_del(&fi->fi_hash); |
8b671b80 BF |
240 | spin_unlock(&recall_lock); |
241 | iput(fi->fi_inode); | |
32513b40 | 242 | nfsd4_free_file(fi); |
8b671b80 | 243 | } |
13cd2184 N |
244 | } |
245 | ||
246 | static inline void | |
247 | get_nfs4_file(struct nfs4_file *fi) | |
248 | { | |
8b671b80 | 249 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
250 | } |
251 | ||
ef0f3390 | 252 | static int num_delegations; |
697ce9be | 253 | unsigned long max_delegations; |
ef0f3390 N |
254 | |
255 | /* | |
256 | * Open owner state (share locks) | |
257 | */ | |
258 | ||
16bfdaaf BF |
259 | /* hash tables for lock and open owners */ |
260 | #define OWNER_HASH_BITS 8 | |
261 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
262 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 263 | |
16bfdaaf | 264 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
265 | { |
266 | unsigned int ret; | |
267 | ||
268 | ret = opaque_hashval(ownername->data, ownername->len); | |
269 | ret += clientid; | |
16bfdaaf | 270 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 271 | } |
ef0f3390 | 272 | |
ef0f3390 N |
273 | /* hash table for nfs4_file */ |
274 | #define FILE_HASH_BITS 8 | |
275 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 276 | |
ddc04c41 BF |
277 | static unsigned int file_hashval(struct inode *ino) |
278 | { | |
279 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
280 | return hash_ptr(ino, FILE_HASH_BITS); | |
281 | } | |
282 | ||
89876f8c | 283 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 284 | |
3477565e BF |
285 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
286 | { | |
287 | WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
288 | atomic_inc(&fp->fi_access[oflag]); | |
289 | } | |
290 | ||
998db52c BF |
291 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
292 | { | |
293 | if (oflag == O_RDWR) { | |
3477565e BF |
294 | __nfs4_file_get_access(fp, O_RDONLY); |
295 | __nfs4_file_get_access(fp, O_WRONLY); | |
998db52c | 296 | } else |
3477565e | 297 | __nfs4_file_get_access(fp, oflag); |
998db52c BF |
298 | } |
299 | ||
300 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
301 | { |
302 | if (fp->fi_fds[oflag]) { | |
303 | fput(fp->fi_fds[oflag]); | |
304 | fp->fi_fds[oflag] = NULL; | |
305 | } | |
306 | } | |
307 | ||
998db52c | 308 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
309 | { |
310 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 311 | nfs4_file_put_fd(fp, oflag); |
0c7c3e67 | 312 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
3d02fa29 | 313 | nfs4_file_put_fd(fp, O_RDWR); |
f9d7562f BF |
314 | } |
315 | } | |
316 | ||
998db52c BF |
317 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
318 | { | |
319 | if (oflag == O_RDWR) { | |
320 | __nfs4_file_put_access(fp, O_RDONLY); | |
321 | __nfs4_file_put_access(fp, O_WRONLY); | |
322 | } else | |
323 | __nfs4_file_put_access(fp, oflag); | |
324 | } | |
325 | ||
3abdb607 BF |
326 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
327 | kmem_cache *slab) | |
2a74aba7 | 328 | { |
3abdb607 | 329 | struct idr *stateids = &cl->cl_stateids; |
3abdb607 | 330 | struct nfs4_stid *stid; |
6136d2b4 | 331 | int new_id; |
2a74aba7 | 332 | |
3abdb607 BF |
333 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
334 | if (!stid) | |
335 | return NULL; | |
336 | ||
398c33aa | 337 | new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL); |
ebd6c707 | 338 | if (new_id < 0) |
3abdb607 | 339 | goto out_free; |
2a74aba7 | 340 | stid->sc_client = cl; |
3abdb607 BF |
341 | stid->sc_type = 0; |
342 | stid->sc_stateid.si_opaque.so_id = new_id; | |
343 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 344 | /* Will be incremented before return to client: */ |
3abdb607 | 345 | stid->sc_stateid.si_generation = 0; |
996e0938 | 346 | |
996e0938 | 347 | /* |
3abdb607 BF |
348 | * It shouldn't be a problem to reuse an opaque stateid value. |
349 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
350 | * example, a stray write retransmission could be accepted by | |
351 | * the server when it should have been rejected. Therefore, | |
352 | * adopt a trick from the sctp code to attempt to maximize the | |
353 | * amount of time until an id is reused, by ensuring they always | |
354 | * "increase" (mod INT_MAX): | |
996e0938 | 355 | */ |
3abdb607 BF |
356 | return stid; |
357 | out_free: | |
2c44a234 | 358 | kmem_cache_free(slab, stid); |
3abdb607 | 359 | return NULL; |
2a74aba7 BF |
360 | } |
361 | ||
4cdc951b BF |
362 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
363 | { | |
364 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
365 | } | |
366 | ||
1da177e4 | 367 | static struct nfs4_delegation * |
99c41515 | 368 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh) |
1da177e4 LT |
369 | { |
370 | struct nfs4_delegation *dp; | |
371 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
372 | |
373 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
374 | if (fp->fi_had_conflict) |
375 | return NULL; | |
c2f1a551 | 376 | if (num_delegations > max_delegations) |
ef0f3390 | 377 | return NULL; |
996e0938 | 378 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 379 | if (dp == NULL) |
1da177e4 | 380 | return dp; |
3abdb607 | 381 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
2a74aba7 BF |
382 | /* |
383 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
384 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
385 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
386 | */ |
387 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 388 | num_delegations++; |
ea1da636 N |
389 | INIT_LIST_HEAD(&dp->dl_perfile); |
390 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 391 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 392 | get_nfs4_file(fp); |
1da177e4 | 393 | dp->dl_file = fp; |
99c41515 | 394 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
6c02eaa1 | 395 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
396 | dp->dl_time = 0; |
397 | atomic_set(&dp->dl_count, 1); | |
57725155 | 398 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
399 | return dp; |
400 | } | |
401 | ||
68a33961 | 402 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
403 | { |
404 | struct idr *stateids = &s->sc_client->cl_stateids; | |
405 | ||
406 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
407 | } |
408 | ||
1da177e4 LT |
409 | void |
410 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
411 | { | |
412 | if (atomic_dec_and_test(&dp->dl_count)) { | |
68a33961 | 413 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 414 | num_delegations--; |
1da177e4 LT |
415 | } |
416 | } | |
417 | ||
acfdf5c3 | 418 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 419 | { |
acfdf5c3 BF |
420 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
421 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
422 | fp->fi_lease = NULL; | |
4ee63624 | 423 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
424 | fp->fi_deleg_file = NULL; |
425 | } | |
1da177e4 LT |
426 | } |
427 | ||
6136d2b4 BF |
428 | static void unhash_stid(struct nfs4_stid *s) |
429 | { | |
3abdb607 | 430 | s->sc_type = 0; |
6136d2b4 BF |
431 | } |
432 | ||
1da177e4 LT |
433 | /* Called under the state lock. */ |
434 | static void | |
435 | unhash_delegation(struct nfs4_delegation *dp) | |
436 | { | |
ea1da636 | 437 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 438 | spin_lock(&recall_lock); |
5d926e8c | 439 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
440 | list_del_init(&dp->dl_recall_lru); |
441 | spin_unlock(&recall_lock); | |
acfdf5c3 | 442 | nfs4_put_deleg_lease(dp->dl_file); |
68a33961 BF |
443 | put_nfs4_file(dp->dl_file); |
444 | dp->dl_file = NULL; | |
3bd64a5b BF |
445 | } |
446 | ||
447 | ||
448 | ||
449 | static void destroy_revoked_delegation(struct nfs4_delegation *dp) | |
450 | { | |
451 | list_del_init(&dp->dl_recall_lru); | |
68a33961 | 452 | remove_stid(&dp->dl_stid); |
1da177e4 LT |
453 | nfs4_put_delegation(dp); |
454 | } | |
455 | ||
3bd64a5b BF |
456 | static void destroy_delegation(struct nfs4_delegation *dp) |
457 | { | |
458 | unhash_delegation(dp); | |
459 | remove_stid(&dp->dl_stid); | |
460 | nfs4_put_delegation(dp); | |
461 | } | |
462 | ||
463 | static void revoke_delegation(struct nfs4_delegation *dp) | |
464 | { | |
465 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
466 | ||
467 | if (clp->cl_minorversion == 0) | |
468 | destroy_delegation(dp); | |
469 | else { | |
470 | unhash_delegation(dp); | |
471 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; | |
472 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
473 | } | |
474 | } | |
475 | ||
1da177e4 LT |
476 | /* |
477 | * SETCLIENTID state | |
478 | */ | |
479 | ||
ddc04c41 BF |
480 | static unsigned int clientid_hashval(u32 id) |
481 | { | |
482 | return id & CLIENT_HASH_MASK; | |
483 | } | |
484 | ||
485 | static unsigned int clientstr_hashval(const char *name) | |
486 | { | |
487 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
488 | } | |
489 | ||
f9d7562f BF |
490 | /* |
491 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
492 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
493 | * only what share bits are currently in force, but also what | |
494 | * combinations of share bits previous opens have used. This allows us | |
495 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
496 | * return an error if the client attempt to downgrade to a combination | |
497 | * of share bits not explicable by closing some of its previous opens. | |
498 | * | |
499 | * XXX: This enforcement is actually incomplete, since we don't keep | |
500 | * track of access/deny bit combinations; so, e.g., we allow: | |
501 | * | |
502 | * OPEN allow read, deny write | |
503 | * OPEN allow both, deny none | |
504 | * DOWNGRADE allow read, deny none | |
505 | * | |
506 | * which we should reject. | |
507 | */ | |
5ae037e5 JL |
508 | static unsigned int |
509 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 510 | int i; |
5ae037e5 | 511 | unsigned int access = 0; |
f9d7562f | 512 | |
f9d7562f BF |
513 | for (i = 1; i < 4; i++) { |
514 | if (test_bit(i, &bmap)) | |
5ae037e5 | 515 | access |= i; |
f9d7562f | 516 | } |
5ae037e5 | 517 | return access; |
f9d7562f BF |
518 | } |
519 | ||
3a328614 | 520 | static bool |
dcef0413 | 521 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
522 | unsigned int access, deny; |
523 | ||
5ae037e5 JL |
524 | access = bmap_to_share_mode(stp->st_access_bmap); |
525 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 526 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
527 | return false; |
528 | return true; | |
f9d7562f BF |
529 | } |
530 | ||
82c5ff1b JL |
531 | /* set share access for a given stateid */ |
532 | static inline void | |
533 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
534 | { | |
535 | __set_bit(access, &stp->st_access_bmap); | |
536 | } | |
537 | ||
538 | /* clear share access for a given stateid */ | |
539 | static inline void | |
540 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
541 | { | |
542 | __clear_bit(access, &stp->st_access_bmap); | |
543 | } | |
544 | ||
545 | /* test whether a given stateid has access */ | |
546 | static inline bool | |
547 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
548 | { | |
549 | return test_bit(access, &stp->st_access_bmap); | |
550 | } | |
551 | ||
ce0fc43c JL |
552 | /* set share deny for a given stateid */ |
553 | static inline void | |
554 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
555 | { | |
556 | __set_bit(access, &stp->st_deny_bmap); | |
557 | } | |
558 | ||
559 | /* clear share deny for a given stateid */ | |
560 | static inline void | |
561 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
562 | { | |
563 | __clear_bit(access, &stp->st_deny_bmap); | |
564 | } | |
565 | ||
566 | /* test whether a given stateid is denying specific access */ | |
567 | static inline bool | |
568 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
569 | { | |
570 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
571 | } |
572 | ||
573 | static int nfs4_access_to_omode(u32 access) | |
574 | { | |
8f34a430 | 575 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
576 | case NFS4_SHARE_ACCESS_READ: |
577 | return O_RDONLY; | |
578 | case NFS4_SHARE_ACCESS_WRITE: | |
579 | return O_WRONLY; | |
580 | case NFS4_SHARE_ACCESS_BOTH: | |
581 | return O_RDWR; | |
582 | } | |
063b0fb9 BF |
583 | WARN_ON_ONCE(1); |
584 | return O_RDONLY; | |
f9d7562f BF |
585 | } |
586 | ||
82c5ff1b JL |
587 | /* release all access and file references for a given stateid */ |
588 | static void | |
589 | release_all_access(struct nfs4_ol_stateid *stp) | |
590 | { | |
591 | int i; | |
592 | ||
593 | for (i = 1; i < 4; i++) { | |
594 | if (test_access(i, stp)) | |
595 | nfs4_file_put_access(stp->st_file, | |
596 | nfs4_access_to_omode(i)); | |
597 | clear_access(i, stp); | |
598 | } | |
599 | } | |
600 | ||
dcef0413 | 601 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 602 | { |
529d7b2a BF |
603 | list_del(&stp->st_perfile); |
604 | list_del(&stp->st_perstateowner); | |
605 | } | |
606 | ||
dcef0413 | 607 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 608 | { |
82c5ff1b | 609 | release_all_access(stp); |
a96e5b90 | 610 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
611 | stp->st_file = NULL; |
612 | } | |
613 | ||
dcef0413 | 614 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 615 | { |
68a33961 BF |
616 | remove_stid(&stp->st_stid); |
617 | kmem_cache_free(stateid_slab, stp); | |
529d7b2a BF |
618 | } |
619 | ||
dcef0413 | 620 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
621 | { |
622 | struct file *file; | |
623 | ||
624 | unhash_generic_stateid(stp); | |
6136d2b4 | 625 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
626 | file = find_any_file(stp->st_file); |
627 | if (file) | |
fe0750e5 | 628 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 629 | close_generic_stateid(stp); |
529d7b2a BF |
630 | free_generic_stateid(stp); |
631 | } | |
632 | ||
fe0750e5 | 633 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 634 | { |
dcef0413 | 635 | struct nfs4_ol_stateid *stp; |
529d7b2a | 636 | |
fe0750e5 BF |
637 | list_del(&lo->lo_owner.so_strhash); |
638 | list_del(&lo->lo_perstateid); | |
009673b4 | 639 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
640 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
641 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 642 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
643 | release_lock_stateid(stp); |
644 | } | |
645 | } | |
646 | ||
fe0750e5 | 647 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 648 | { |
fe0750e5 BF |
649 | unhash_lockowner(lo); |
650 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
651 | } |
652 | ||
653 | static void | |
dcef0413 | 654 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 655 | { |
fe0750e5 | 656 | struct nfs4_lockowner *lo; |
529d7b2a BF |
657 | |
658 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
659 | lo = list_entry(open_stp->st_lockowners.next, |
660 | struct nfs4_lockowner, lo_perstateid); | |
661 | release_lockowner(lo); | |
529d7b2a BF |
662 | } |
663 | } | |
664 | ||
38c387b5 | 665 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
666 | { |
667 | unhash_generic_stateid(stp); | |
668 | release_stateid_lockowners(stp); | |
38c387b5 BF |
669 | close_generic_stateid(stp); |
670 | } | |
671 | ||
672 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
673 | { | |
674 | unhash_open_stateid(stp); | |
6136d2b4 | 675 | unhash_stid(&stp->st_stid); |
2283963f BF |
676 | free_generic_stateid(stp); |
677 | } | |
678 | ||
fe0750e5 | 679 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 680 | { |
dcef0413 | 681 | struct nfs4_ol_stateid *stp; |
f1d110ca | 682 | |
fe0750e5 BF |
683 | list_del(&oo->oo_owner.so_strhash); |
684 | list_del(&oo->oo_perclient); | |
685 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
686 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 687 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 688 | release_open_stateid(stp); |
f1d110ca BF |
689 | } |
690 | } | |
691 | ||
f7a4d872 BF |
692 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
693 | { | |
694 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
695 | ||
696 | if (s) { | |
6136d2b4 | 697 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
698 | free_generic_stateid(s); |
699 | oo->oo_last_closed_stid = NULL; | |
700 | } | |
701 | } | |
702 | ||
fe0750e5 | 703 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 704 | { |
fe0750e5 BF |
705 | unhash_openowner(oo); |
706 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 707 | release_last_closed_stateid(oo); |
fe0750e5 | 708 | nfs4_free_openowner(oo); |
f1d110ca BF |
709 | } |
710 | ||
5282fd72 ME |
711 | static inline int |
712 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
713 | { | |
714 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
715 | ||
716 | return sid->sequence % SESSION_HASH_SIZE; | |
717 | } | |
718 | ||
8f199b82 | 719 | #ifdef NFSD_DEBUG |
5282fd72 ME |
720 | static inline void |
721 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
722 | { | |
723 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
724 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
725 | } | |
8f199b82 TM |
726 | #else |
727 | static inline void | |
728 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
729 | { | |
730 | } | |
731 | #endif | |
732 | ||
9411b1d4 BF |
733 | /* |
734 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
735 | * won't be used for replay. | |
736 | */ | |
737 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
738 | { | |
739 | struct nfs4_stateowner *so = cstate->replay_owner; | |
740 | ||
741 | if (nfserr == nfserr_replay_me) | |
742 | return; | |
743 | ||
744 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
745 | cstate->replay_owner = NULL; | |
746 | return; | |
747 | } | |
748 | if (!so) | |
749 | return; | |
750 | if (so->so_is_open_owner) | |
751 | release_last_closed_stateid(openowner(so)); | |
752 | so->so_seqid++; | |
753 | return; | |
754 | } | |
5282fd72 | 755 | |
ec6b5d7b AA |
756 | static void |
757 | gen_sessionid(struct nfsd4_session *ses) | |
758 | { | |
759 | struct nfs4_client *clp = ses->se_client; | |
760 | struct nfsd4_sessionid *sid; | |
761 | ||
762 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
763 | sid->clientid = clp->cl_clientid; | |
764 | sid->sequence = current_sessionid++; | |
765 | sid->reserved = 0; | |
766 | } | |
767 | ||
768 | /* | |
a649637c AA |
769 | * The protocol defines ca_maxresponssize_cached to include the size of |
770 | * the rpc header, but all we need to cache is the data starting after | |
771 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
772 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
773 | * value that is the number of bytes in our cache plus a few additional | |
774 | * bytes. In order to stay on the safe side, and not promise more than | |
775 | * we can cache, those additional bytes must be the minimum possible: 24 | |
776 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
777 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
778 | * for the SEQUENCE op response: | |
779 | */ | |
780 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
781 | ||
557ce264 AA |
782 | static void |
783 | free_session_slots(struct nfsd4_session *ses) | |
784 | { | |
785 | int i; | |
786 | ||
787 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
788 | kfree(ses->se_slots[i]); | |
789 | } | |
790 | ||
a649637c | 791 | /* |
efe0cb6d BF |
792 | * We don't actually need to cache the rpc and session headers, so we |
793 | * can allocate a little less for each slot: | |
794 | */ | |
55c760cf | 795 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 796 | { |
55c760cf | 797 | u32 size; |
efe0cb6d | 798 | |
55c760cf BF |
799 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
800 | size = 0; | |
801 | else | |
802 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
803 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 804 | } |
ec6b5d7b | 805 | |
5b6feee9 BF |
806 | /* |
807 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 808 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 809 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 810 | */ |
55c760cf | 811 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 812 | { |
55c760cf BF |
813 | u32 slotsize = slot_bytes(ca); |
814 | u32 num = ca->maxreqs; | |
5b6feee9 | 815 | int avail; |
ec6b5d7b | 816 | |
5b6feee9 | 817 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
818 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
819 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
820 | num = min_t(int, num, avail / slotsize); |
821 | nfsd_drc_mem_used += num * slotsize; | |
822 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 823 | |
5b6feee9 BF |
824 | return num; |
825 | } | |
ec6b5d7b | 826 | |
55c760cf | 827 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 828 | { |
55c760cf BF |
829 | int slotsize = slot_bytes(ca); |
830 | ||
4bd9b0f4 | 831 | spin_lock(&nfsd_drc_lock); |
55c760cf | 832 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 833 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 834 | } |
ec6b5d7b | 835 | |
55c760cf | 836 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *attrs) |
5b6feee9 | 837 | { |
55c760cf BF |
838 | int numslots = attrs->maxreqs; |
839 | int slotsize = slot_bytes(attrs); | |
5b6feee9 BF |
840 | struct nfsd4_session *new; |
841 | int mem, i; | |
a649637c | 842 | |
5b6feee9 BF |
843 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
844 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
845 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 846 | |
5b6feee9 BF |
847 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
848 | if (!new) | |
849 | return NULL; | |
557ce264 | 850 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 851 | for (i = 0; i < numslots; i++) { |
55c760cf | 852 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 853 | if (!new->se_slots[i]) |
557ce264 | 854 | goto out_free; |
557ce264 | 855 | } |
5b6feee9 BF |
856 | return new; |
857 | out_free: | |
858 | while (i--) | |
859 | kfree(new->se_slots[i]); | |
860 | kfree(new); | |
861 | return NULL; | |
ec6b5d7b AA |
862 | } |
863 | ||
19cf5c02 BF |
864 | static void free_conn(struct nfsd4_conn *c) |
865 | { | |
866 | svc_xprt_put(c->cn_xprt); | |
867 | kfree(c); | |
868 | } | |
ec6b5d7b | 869 | |
19cf5c02 BF |
870 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
871 | { | |
872 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
873 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 874 | |
19cf5c02 BF |
875 | spin_lock(&clp->cl_lock); |
876 | if (!list_empty(&c->cn_persession)) { | |
877 | list_del(&c->cn_persession); | |
878 | free_conn(c); | |
879 | } | |
eea49806 | 880 | nfsd4_probe_callback(clp); |
2e4b7239 | 881 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 882 | } |
ec6b5d7b | 883 | |
d29c374c | 884 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 885 | { |
c7662518 | 886 | struct nfsd4_conn *conn; |
ec6b5d7b | 887 | |
c7662518 BF |
888 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
889 | if (!conn) | |
db90681d | 890 | return NULL; |
c7662518 BF |
891 | svc_xprt_get(rqstp->rq_xprt); |
892 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 893 | conn->cn_flags = flags; |
db90681d BF |
894 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
895 | return conn; | |
896 | } | |
a649637c | 897 | |
328ead28 BF |
898 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
899 | { | |
900 | conn->cn_session = ses; | |
901 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
902 | } |
903 | ||
db90681d | 904 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 905 | { |
db90681d | 906 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 907 | |
c7662518 | 908 | spin_lock(&clp->cl_lock); |
328ead28 | 909 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 910 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
911 | } |
912 | ||
21b75b01 | 913 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 914 | { |
19cf5c02 | 915 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 916 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
917 | } |
918 | ||
e1ff371f | 919 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 920 | { |
21b75b01 | 921 | int ret; |
ec6b5d7b | 922 | |
db90681d | 923 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
924 | ret = nfsd4_register_conn(conn); |
925 | if (ret) | |
926 | /* oops; xprt is already down: */ | |
927 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 928 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
929 | /* callback channel may be back up */ |
930 | nfsd4_probe_callback(ses->se_client); | |
931 | } | |
c7662518 | 932 | } |
ec6b5d7b | 933 | |
e1ff371f | 934 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
935 | { |
936 | u32 dir = NFS4_CDFC4_FORE; | |
937 | ||
e1ff371f | 938 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 939 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 940 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
941 | } |
942 | ||
943 | /* must be called under client_lock */ | |
19cf5c02 | 944 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 945 | { |
19cf5c02 BF |
946 | struct nfs4_client *clp = s->se_client; |
947 | struct nfsd4_conn *c; | |
ec6b5d7b | 948 | |
19cf5c02 BF |
949 | spin_lock(&clp->cl_lock); |
950 | while (!list_empty(&s->se_conns)) { | |
951 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
952 | list_del_init(&c->cn_persession); | |
953 | spin_unlock(&clp->cl_lock); | |
557ce264 | 954 | |
19cf5c02 BF |
955 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
956 | free_conn(c); | |
ec6b5d7b | 957 | |
19cf5c02 BF |
958 | spin_lock(&clp->cl_lock); |
959 | } | |
960 | spin_unlock(&clp->cl_lock); | |
c7662518 | 961 | } |
ec6b5d7b | 962 | |
1377b69e BF |
963 | static void __free_session(struct nfsd4_session *ses) |
964 | { | |
1377b69e BF |
965 | free_session_slots(ses); |
966 | kfree(ses); | |
967 | } | |
968 | ||
66b2b9b2 | 969 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 970 | { |
66b2b9b2 | 971 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
972 | |
973 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 974 | nfsd4_del_conns(ses); |
55c760cf | 975 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 976 | __free_session(ses); |
c7662518 BF |
977 | } |
978 | ||
135ae827 | 979 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 980 | { |
a827bcb2 | 981 | int idx; |
1872de0e | 982 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 983 | |
ec6b5d7b AA |
984 | new->se_client = clp; |
985 | gen_sessionid(new); | |
ec6b5d7b | 986 | |
c7662518 BF |
987 | INIT_LIST_HEAD(&new->se_conns); |
988 | ||
ac7c46f2 | 989 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 990 | new->se_flags = cses->flags; |
8b5ce5cd | 991 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 992 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 993 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 994 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 995 | spin_lock(&nn->client_lock); |
1872de0e | 996 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 997 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 998 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 999 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1000 | spin_unlock(&nn->client_lock); |
55c760cf BF |
1001 | memcpy(&new->se_fchannel, &cses->fore_channel, |
1002 | sizeof(struct nfsd4_channel_attrs)); | |
dcbeaa68 | 1003 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1004 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1005 | /* |
1006 | * This is a little silly; with sessions there's no real | |
1007 | * use for the callback address. Use the peer address | |
1008 | * as a reasonable default for now, but consider fixing | |
1009 | * the rpc client not to require an address in the | |
1010 | * future: | |
1011 | */ | |
edd76786 BF |
1012 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1013 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1014 | } |
ec6b5d7b AA |
1015 | } |
1016 | ||
9089f1b4 | 1017 | /* caller must hold client_lock */ |
5282fd72 | 1018 | static struct nfsd4_session * |
1872de0e | 1019 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1020 | { |
1021 | struct nfsd4_session *elem; | |
1022 | int idx; | |
1872de0e | 1023 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1024 | |
1025 | dump_sessionid(__func__, sessionid); | |
1026 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1027 | /* Search in the appropriate list */ |
1872de0e | 1028 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1029 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1030 | NFS4_MAX_SESSIONID_LEN)) { | |
1031 | return elem; | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | dprintk("%s: session not found\n", __func__); | |
1036 | return NULL; | |
1037 | } | |
1038 | ||
9089f1b4 | 1039 | /* caller must hold client_lock */ |
7116ed6b | 1040 | static void |
5282fd72 | 1041 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1042 | { |
1043 | list_del(&ses->se_hash); | |
4c649378 | 1044 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1045 | list_del(&ses->se_perclnt); |
4c649378 | 1046 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1047 | } |
1048 | ||
1da177e4 LT |
1049 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1050 | static int | |
2c142baa | 1051 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1052 | { |
2c142baa | 1053 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1054 | return 0; |
60adfc50 | 1055 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1056 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1057 | return 1; |
1058 | } | |
1059 | ||
1060 | /* | |
1061 | * XXX Should we use a slab cache ? | |
1062 | * This type of memory management is somewhat inefficient, but we use it | |
1063 | * anyway since SETCLIENTID is not a common operation. | |
1064 | */ | |
35bba9a3 | 1065 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1066 | { |
1067 | struct nfs4_client *clp; | |
1068 | ||
35bba9a3 BF |
1069 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1070 | if (clp == NULL) | |
1071 | return NULL; | |
67114fe6 | 1072 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1073 | if (clp->cl_name.data == NULL) { |
1074 | kfree(clp); | |
1075 | return NULL; | |
1da177e4 | 1076 | } |
35bba9a3 | 1077 | clp->cl_name.len = name.len; |
1da177e4 LT |
1078 | return clp; |
1079 | } | |
1080 | ||
1081 | static inline void | |
1082 | free_client(struct nfs4_client *clp) | |
1083 | { | |
bca0ec65 | 1084 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1085 | |
1086 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1087 | while (!list_empty(&clp->cl_sessions)) { |
1088 | struct nfsd4_session *ses; | |
1089 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1090 | se_perclnt); | |
1091 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1092 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1093 | free_session(ses); | |
792c95dd | 1094 | } |
03a4e1f6 | 1095 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1096 | kfree(clp->cl_name.data); |
2d32b29a | 1097 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1098 | kfree(clp); |
1099 | } | |
1100 | ||
84d38ac9 BH |
1101 | /* must be called under the client_lock */ |
1102 | static inline void | |
1103 | unhash_client_locked(struct nfs4_client *clp) | |
1104 | { | |
792c95dd BF |
1105 | struct nfsd4_session *ses; |
1106 | ||
84d38ac9 | 1107 | list_del(&clp->cl_lru); |
4c649378 | 1108 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1109 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1110 | list_del_init(&ses->se_hash); | |
4c649378 | 1111 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1112 | } |
1113 | ||
1da177e4 | 1114 | static void |
0d22f68f | 1115 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1116 | { |
fe0750e5 | 1117 | struct nfs4_openowner *oo; |
1da177e4 | 1118 | struct nfs4_delegation *dp; |
1da177e4 | 1119 | struct list_head reaplist; |
382a62e7 | 1120 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1121 | |
1da177e4 LT |
1122 | INIT_LIST_HEAD(&reaplist); |
1123 | spin_lock(&recall_lock); | |
ea1da636 N |
1124 | while (!list_empty(&clp->cl_delegations)) { |
1125 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1126 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1127 | list_move(&dp->dl_recall_lru, &reaplist); |
1128 | } | |
1129 | spin_unlock(&recall_lock); | |
1130 | while (!list_empty(&reaplist)) { | |
1131 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 1132 | destroy_delegation(dp); |
1da177e4 | 1133 | } |
ea1da636 | 1134 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1135 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1136 | release_openowner(oo); | |
1da177e4 | 1137 | } |
6ff8da08 | 1138 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1139 | if (clp->cl_cb_conn.cb_xprt) |
1140 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1141 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1142 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1143 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1144 | else |
a99454aa | 1145 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1146 | spin_lock(&nn->client_lock); |
84d38ac9 | 1147 | unhash_client_locked(clp); |
221a6876 BF |
1148 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1149 | free_client(clp); | |
c9a49628 | 1150 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1151 | } |
1152 | ||
0d22f68f BF |
1153 | static void expire_client(struct nfs4_client *clp) |
1154 | { | |
1155 | nfsd4_client_record_remove(clp); | |
1156 | destroy_client(clp); | |
1157 | } | |
1158 | ||
35bba9a3 BF |
1159 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1160 | { | |
1161 | memcpy(target->cl_verifier.data, source->data, | |
1162 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1163 | } |
1164 | ||
35bba9a3 BF |
1165 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1166 | { | |
1da177e4 LT |
1167 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1168 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1169 | } | |
1170 | ||
03a4e1f6 | 1171 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1172 | { |
03a4e1f6 BF |
1173 | if (source->cr_principal) { |
1174 | target->cr_principal = | |
1175 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1176 | if (target->cr_principal == NULL) | |
1177 | return -ENOMEM; | |
1178 | } else | |
1179 | target->cr_principal = NULL; | |
d5497fc6 | 1180 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1181 | target->cr_uid = source->cr_uid; |
1182 | target->cr_gid = source->cr_gid; | |
1183 | target->cr_group_info = source->cr_group_info; | |
1184 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1185 | target->cr_gss_mech = source->cr_gss_mech; |
1186 | if (source->cr_gss_mech) | |
1187 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1188 | return 0; |
1da177e4 LT |
1189 | } |
1190 | ||
ac55fdc4 JL |
1191 | static long long |
1192 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1193 | { | |
1194 | long long res; | |
1195 | ||
1196 | res = o1->len - o2->len; | |
1197 | if (res) | |
1198 | return res; | |
1199 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1200 | } | |
1201 | ||
35bba9a3 | 1202 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1203 | { |
a55370a3 | 1204 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1205 | } |
1206 | ||
1207 | static int | |
599e0a22 BF |
1208 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1209 | { | |
1210 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1211 | } |
1212 | ||
1213 | static int | |
599e0a22 BF |
1214 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1215 | { | |
1216 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1217 | } |
1218 | ||
8fbba96e BF |
1219 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1220 | { | |
1221 | int i; | |
1222 | ||
1223 | if (g1->ngroups != g2->ngroups) | |
1224 | return false; | |
1225 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1226 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1227 | return false; |
1228 | return true; | |
1229 | } | |
1230 | ||
68eb3508 BF |
1231 | /* |
1232 | * RFC 3530 language requires clid_inuse be returned when the | |
1233 | * "principal" associated with a requests differs from that previously | |
1234 | * used. We use uid, gid's, and gss principal string as our best | |
1235 | * approximation. We also don't want to allow non-gss use of a client | |
1236 | * established using gss: in theory cr_principal should catch that | |
1237 | * change, but in practice cr_principal can be null even in the gss case | |
1238 | * since gssd doesn't always pass down a principal string. | |
1239 | */ | |
1240 | static bool is_gss_cred(struct svc_cred *cr) | |
1241 | { | |
1242 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1243 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1244 | } | |
1245 | ||
1246 | ||
5559b50a | 1247 | static bool |
599e0a22 BF |
1248 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1249 | { | |
68eb3508 | 1250 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1251 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1252 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1253 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1254 | return false; | |
1255 | if (cr1->cr_principal == cr2->cr_principal) | |
1256 | return true; | |
1257 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1258 | return false; | |
5559b50a | 1259 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1260 | } |
1261 | ||
57266a6e BF |
1262 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1263 | { | |
1264 | struct svc_cred *cr = &rqstp->rq_cred; | |
1265 | u32 service; | |
1266 | ||
c4720591 BF |
1267 | if (!cr->cr_gss_mech) |
1268 | return false; | |
57266a6e BF |
1269 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1270 | return service == RPC_GSS_SVC_INTEGRITY || | |
1271 | service == RPC_GSS_SVC_PRIVACY; | |
1272 | } | |
1273 | ||
1274 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1275 | { | |
1276 | struct svc_cred *cr = &rqstp->rq_cred; | |
1277 | ||
1278 | if (!cl->cl_mach_cred) | |
1279 | return true; | |
1280 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1281 | return false; | |
1282 | if (!svc_rqst_integrity_protected(rqstp)) | |
1283 | return false; | |
1284 | if (!cr->cr_principal) | |
1285 | return false; | |
1286 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1287 | } | |
1288 | ||
c212cecf | 1289 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1290 | { |
1291 | static u32 current_clientid = 1; | |
1292 | ||
2c142baa | 1293 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1294 | clp->cl_clientid.cl_id = current_clientid++; |
1295 | } | |
1296 | ||
deda2faa BF |
1297 | static void gen_confirm(struct nfs4_client *clp) |
1298 | { | |
ab4684d1 | 1299 | __be32 verf[2]; |
deda2faa | 1300 | static u32 i; |
1da177e4 | 1301 | |
ab4684d1 CL |
1302 | verf[0] = (__be32)get_seconds(); |
1303 | verf[1] = (__be32)i++; | |
1304 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1305 | } |
1306 | ||
38c2f4b1 | 1307 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1308 | { |
3abdb607 BF |
1309 | struct nfs4_stid *ret; |
1310 | ||
1311 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1312 | if (!ret || !ret->sc_type) | |
1313 | return NULL; | |
1314 | return ret; | |
4d71ab87 BF |
1315 | } |
1316 | ||
38c2f4b1 | 1317 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1318 | { |
1319 | struct nfs4_stid *s; | |
4d71ab87 | 1320 | |
38c2f4b1 | 1321 | s = find_stateid(cl, t); |
4d71ab87 BF |
1322 | if (!s) |
1323 | return NULL; | |
f459e453 | 1324 | if (typemask & s->sc_type) |
4581d140 | 1325 | return s; |
4581d140 BF |
1326 | return NULL; |
1327 | } | |
1328 | ||
2216d449 | 1329 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1330 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1331 | { | |
1332 | struct nfs4_client *clp; | |
1333 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1334 | int ret; |
c212cecf | 1335 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1336 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1337 | |
1338 | clp = alloc_client(name); | |
1339 | if (clp == NULL) | |
1340 | return NULL; | |
1341 | ||
792c95dd | 1342 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1343 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1344 | if (ret) { | |
c9a49628 | 1345 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1346 | free_client(clp); |
c9a49628 | 1347 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1348 | return NULL; |
b09333c4 | 1349 | } |
38c2f4b1 | 1350 | idr_init(&clp->cl_stateids); |
46583e25 | 1351 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1352 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1353 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1354 | INIT_LIST_HEAD(&clp->cl_openowners); |
1355 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1356 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1357 | INIT_LIST_HEAD(&clp->cl_callbacks); |
3bd64a5b | 1358 | INIT_LIST_HEAD(&clp->cl_revoked); |
6ff8da08 | 1359 | spin_lock_init(&clp->cl_lock); |
57725155 | 1360 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1361 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1362 | clear_bit(0, &clp->cl_cb_slot_busy); |
1363 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1364 | copy_verf(clp, verf); | |
1365 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1366 | gen_confirm(clp); |
edd76786 | 1367 | clp->cl_cb_session = NULL; |
c212cecf | 1368 | clp->net = net; |
b09333c4 RL |
1369 | return clp; |
1370 | } | |
1371 | ||
fd39ca9a | 1372 | static void |
ac55fdc4 JL |
1373 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1374 | { | |
1375 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1376 | struct nfs4_client *clp; | |
1377 | ||
1378 | while (*new) { | |
1379 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1380 | parent = *new; | |
1381 | ||
1382 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1383 | new = &((*new)->rb_left); | |
1384 | else | |
1385 | new = &((*new)->rb_right); | |
1386 | } | |
1387 | ||
1388 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1389 | rb_insert_color(&new_clp->cl_namenode, root); | |
1390 | } | |
1391 | ||
1392 | static struct nfs4_client * | |
1393 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1394 | { | |
1395 | long long cmp; | |
1396 | struct rb_node *node = root->rb_node; | |
1397 | struct nfs4_client *clp; | |
1398 | ||
1399 | while (node) { | |
1400 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1401 | cmp = compare_blob(&clp->cl_name, name); | |
1402 | if (cmp > 0) | |
1403 | node = node->rb_left; | |
1404 | else if (cmp < 0) | |
1405 | node = node->rb_right; | |
1406 | else | |
1407 | return clp; | |
1408 | } | |
1409 | return NULL; | |
1410 | } | |
1411 | ||
1412 | static void | |
1413 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1414 | { |
1415 | unsigned int idhashval; | |
0a7ec377 | 1416 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1417 | |
ac55fdc4 | 1418 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1419 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1420 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1421 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1422 | renew_client(clp); |
1da177e4 LT |
1423 | } |
1424 | ||
fd39ca9a | 1425 | static void |
1da177e4 LT |
1426 | move_to_confirmed(struct nfs4_client *clp) |
1427 | { | |
1428 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1429 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1430 | |
1431 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1432 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1433 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1434 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1435 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1436 | renew_client(clp); |
1437 | } | |
1438 | ||
1439 | static struct nfs4_client * | |
bfa85e83 | 1440 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1441 | { |
1442 | struct nfs4_client *clp; | |
1443 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1444 | ||
bfa85e83 | 1445 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1446 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1447 | if ((bool)clp->cl_minorversion != sessions) |
1448 | return NULL; | |
a50d2ad1 | 1449 | renew_client(clp); |
1da177e4 | 1450 | return clp; |
a50d2ad1 | 1451 | } |
1da177e4 LT |
1452 | } |
1453 | return NULL; | |
1454 | } | |
1455 | ||
bfa85e83 BF |
1456 | static struct nfs4_client * |
1457 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1458 | { | |
1459 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1460 | ||
1461 | return find_client_in_id_table(tbl, clid, sessions); | |
1462 | } | |
1463 | ||
1da177e4 | 1464 | static struct nfs4_client * |
0a7ec377 | 1465 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1466 | { |
bfa85e83 | 1467 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1468 | |
bfa85e83 | 1469 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1470 | } |
1471 | ||
6e5f15c9 | 1472 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1473 | { |
6e5f15c9 | 1474 | return clp->cl_exchange_flags != 0; |
e203d506 | 1475 | } |
a1bcecd2 | 1476 | |
28ce6054 | 1477 | static struct nfs4_client * |
382a62e7 | 1478 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1479 | { |
382a62e7 | 1480 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1481 | } |
1482 | ||
1483 | static struct nfs4_client * | |
a99454aa | 1484 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1485 | { |
a99454aa | 1486 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1487 | } |
1488 | ||
fd39ca9a | 1489 | static void |
6f3d772f | 1490 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1491 | { |
07263f1e | 1492 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1493 | struct sockaddr *sa = svc_addr(rqstp); |
1494 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1495 | unsigned short expected_family; |
1496 | ||
1497 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1498 | if (se->se_callback_netid_len == 3 && | |
1499 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1500 | expected_family = AF_INET; | |
1501 | else if (se->se_callback_netid_len == 4 && | |
1502 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1503 | expected_family = AF_INET6; | |
1504 | else | |
1da177e4 LT |
1505 | goto out_err; |
1506 | ||
c212cecf | 1507 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1508 | se->se_callback_addr_len, |
07263f1e BF |
1509 | (struct sockaddr *)&conn->cb_addr, |
1510 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1511 | |
07263f1e | 1512 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1513 | goto out_err; |
aa9a4ec7 | 1514 | |
07263f1e BF |
1515 | if (conn->cb_addr.ss_family == AF_INET6) |
1516 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1517 | |
07263f1e BF |
1518 | conn->cb_prog = se->se_callback_prog; |
1519 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1520 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1521 | return; |
1522 | out_err: | |
07263f1e BF |
1523 | conn->cb_addr.ss_family = AF_UNSPEC; |
1524 | conn->cb_addrlen = 0; | |
849823c5 | 1525 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1526 | "will not receive delegations\n", |
1527 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1528 | ||
1da177e4 LT |
1529 | return; |
1530 | } | |
1531 | ||
074fe897 | 1532 | /* |
557ce264 | 1533 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1534 | */ |
074fe897 AA |
1535 | void |
1536 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1537 | { |
557ce264 AA |
1538 | struct nfsd4_slot *slot = resp->cstate.slot; |
1539 | unsigned int base; | |
074fe897 | 1540 | |
557ce264 | 1541 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1542 | |
557ce264 AA |
1543 | slot->sl_opcnt = resp->opcnt; |
1544 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1545 | |
bf5c43c8 | 1546 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1547 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1548 | slot->sl_datalen = 0; |
bf864a31 | 1549 | return; |
074fe897 | 1550 | } |
557ce264 AA |
1551 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1552 | base = (char *)resp->cstate.datap - | |
1553 | (char *)resp->xbuf->head[0].iov_base; | |
1554 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1555 | slot->sl_datalen)) | |
1556 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1557 | return; | |
074fe897 AA |
1558 | } |
1559 | ||
1560 | /* | |
abfabf8c AA |
1561 | * Encode the replay sequence operation from the slot values. |
1562 | * If cachethis is FALSE encode the uncached rep error on the next | |
1563 | * operation which sets resp->p and increments resp->opcnt for | |
1564 | * nfs4svc_encode_compoundres. | |
074fe897 | 1565 | * |
074fe897 | 1566 | */ |
abfabf8c AA |
1567 | static __be32 |
1568 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1569 | struct nfsd4_compoundres *resp) | |
074fe897 | 1570 | { |
abfabf8c AA |
1571 | struct nfsd4_op *op; |
1572 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1573 | |
abfabf8c AA |
1574 | /* Encode the replayed sequence operation */ |
1575 | op = &args->ops[resp->opcnt - 1]; | |
1576 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1577 | |
abfabf8c | 1578 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1579 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1580 | op = &args->ops[resp->opcnt++]; |
1581 | op->status = nfserr_retry_uncached_rep; | |
1582 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1583 | } |
abfabf8c | 1584 | return op->status; |
074fe897 AA |
1585 | } |
1586 | ||
1587 | /* | |
557ce264 AA |
1588 | * The sequence operation is not cached because we can use the slot and |
1589 | * session values. | |
074fe897 AA |
1590 | */ |
1591 | __be32 | |
bf864a31 AA |
1592 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1593 | struct nfsd4_sequence *seq) | |
074fe897 | 1594 | { |
557ce264 | 1595 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1596 | __be32 status; |
1597 | ||
557ce264 | 1598 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1599 | |
abfabf8c AA |
1600 | /* Either returns 0 or nfserr_retry_uncached */ |
1601 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1602 | if (status == nfserr_retry_uncached_rep) | |
1603 | return status; | |
074fe897 | 1604 | |
557ce264 AA |
1605 | /* The sequence operation has been encoded, cstate->datap set. */ |
1606 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1607 | |
557ce264 AA |
1608 | resp->opcnt = slot->sl_opcnt; |
1609 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1610 | status = slot->sl_status; | |
074fe897 AA |
1611 | |
1612 | return status; | |
1613 | } | |
1614 | ||
0733d213 AA |
1615 | /* |
1616 | * Set the exchange_id flags returned by the server. | |
1617 | */ | |
1618 | static void | |
1619 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1620 | { | |
1621 | /* pNFS is not supported */ | |
1622 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1623 | ||
1624 | /* Referrals are supported, Migration is not. */ | |
1625 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1626 | ||
1627 | /* set the wire flags to return to client. */ | |
1628 | clid->flags = new->cl_exchange_flags; | |
1629 | } | |
1630 | ||
631fc9ea BF |
1631 | static bool client_has_state(struct nfs4_client *clp) |
1632 | { | |
1633 | /* | |
1634 | * Note clp->cl_openowners check isn't quite right: there's no | |
1635 | * need to count owners without stateid's. | |
1636 | * | |
1637 | * Also note we should probably be using this in 4.0 case too. | |
1638 | */ | |
6eccece9 BF |
1639 | return !list_empty(&clp->cl_openowners) |
1640 | || !list_empty(&clp->cl_delegations) | |
1641 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1642 | } |
1643 | ||
069b6ad4 AA |
1644 | __be32 |
1645 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1646 | struct nfsd4_compound_state *cstate, | |
1647 | struct nfsd4_exchange_id *exid) | |
1648 | { | |
0733d213 | 1649 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1650 | __be32 status; |
363168b4 | 1651 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1652 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1653 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1654 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1655 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1656 | |
363168b4 | 1657 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1658 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1659 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1660 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1661 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1662 | |
a084daf5 | 1663 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1664 | return nfserr_inval; |
1665 | ||
0733d213 | 1666 | switch (exid->spa_how) { |
57266a6e BF |
1667 | case SP4_MACH_CRED: |
1668 | if (!svc_rqst_integrity_protected(rqstp)) | |
1669 | return nfserr_inval; | |
0733d213 AA |
1670 | case SP4_NONE: |
1671 | break; | |
063b0fb9 BF |
1672 | default: /* checked by xdr code */ |
1673 | WARN_ON_ONCE(1); | |
0733d213 | 1674 | case SP4_SSV: |
dd30333c | 1675 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
1676 | } |
1677 | ||
2dbb269d | 1678 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1679 | nfs4_lock_state(); |
382a62e7 | 1680 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1681 | if (conf) { |
83e08fd4 BF |
1682 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1683 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1684 | ||
136e658d BF |
1685 | if (update) { |
1686 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1687 | status = nfserr_inval; |
1a308118 BF |
1688 | goto out; |
1689 | } | |
57266a6e BF |
1690 | if (!mach_creds_match(conf, rqstp)) { |
1691 | status = nfserr_wrong_cred; | |
1692 | goto out; | |
1693 | } | |
136e658d | 1694 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1695 | status = nfserr_perm; |
136e658d BF |
1696 | goto out; |
1697 | } | |
1698 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1699 | status = nfserr_not_same; |
1700 | goto out; | |
1701 | } | |
136e658d BF |
1702 | /* case 6 */ |
1703 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1704 | new = conf; | |
1705 | goto out_copy; | |
0733d213 | 1706 | } |
136e658d | 1707 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1708 | if (client_has_state(conf)) { |
1709 | status = nfserr_clid_inuse; | |
0733d213 AA |
1710 | goto out; |
1711 | } | |
1712 | expire_client(conf); | |
1713 | goto out_new; | |
1714 | } | |
136e658d | 1715 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1716 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1717 | new = conf; |
1718 | goto out_copy; | |
1719 | } | |
1720 | /* case 5, client reboot */ | |
136e658d | 1721 | goto out_new; |
6ddbbbfe MS |
1722 | } |
1723 | ||
2dbb269d | 1724 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1725 | status = nfserr_noent; |
1726 | goto out; | |
0733d213 AA |
1727 | } |
1728 | ||
a99454aa | 1729 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1730 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1731 | expire_client(unconf); |
0733d213 | 1732 | |
2dbb269d | 1733 | /* case 1 (normal case) */ |
0733d213 | 1734 | out_new: |
2216d449 | 1735 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1736 | if (new == NULL) { |
4731030d | 1737 | status = nfserr_jukebox; |
0733d213 AA |
1738 | goto out; |
1739 | } | |
4f540e29 | 1740 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 1741 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 1742 | |
c212cecf | 1743 | gen_clid(new, nn); |
ac55fdc4 | 1744 | add_to_unconfirmed(new); |
0733d213 AA |
1745 | out_copy: |
1746 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1747 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1748 | ||
778df3f0 | 1749 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1750 | nfsd4_set_ex_flags(new, exid); |
1751 | ||
1752 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1753 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1754 | status = nfs_ok; |
1755 | ||
1756 | out: | |
1757 | nfs4_unlock_state(); | |
0733d213 | 1758 | return status; |
069b6ad4 AA |
1759 | } |
1760 | ||
57b7b43b | 1761 | static __be32 |
88e588d5 | 1762 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1763 | { |
88e588d5 AA |
1764 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1765 | slot_seqid); | |
b85d4c01 BH |
1766 | |
1767 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1768 | if (slot_inuse) { |
1769 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1770 | return nfserr_jukebox; |
1771 | else | |
1772 | return nfserr_seq_misordered; | |
1773 | } | |
f6d82485 | 1774 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1775 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1776 | return nfs_ok; |
88e588d5 | 1777 | if (seqid == slot_seqid) |
b85d4c01 | 1778 | return nfserr_replay_cache; |
b85d4c01 BH |
1779 | return nfserr_seq_misordered; |
1780 | } | |
1781 | ||
49557cc7 AA |
1782 | /* |
1783 | * Cache the create session result into the create session single DRC | |
1784 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1785 | * Do this for solo or embedded create session operations. | |
1786 | */ | |
1787 | static void | |
1788 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1789 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1790 | { |
1791 | slot->sl_status = nfserr; | |
1792 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1793 | } | |
1794 | ||
1795 | static __be32 | |
1796 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1797 | struct nfsd4_clid_slot *slot) | |
1798 | { | |
1799 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1800 | return slot->sl_status; | |
1801 | } | |
1802 | ||
1b74c25b MJ |
1803 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1804 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1805 | 1 + /* MIN tag is length with zero, only length */ \ | |
1806 | 3 + /* version, opcount, opcode */ \ | |
1807 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1808 | /* seqid, slotID, slotID, cache */ \ | |
1809 | 4 ) * sizeof(__be32)) | |
1810 | ||
1811 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1812 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1813 | 1 + /* status */ \ | |
1814 | 1 + /* MIN tag is length with zero, only length */ \ | |
1815 | 3 + /* opcount, opcode, opstatus*/ \ | |
1816 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1817 | /* seqid, slotID, slotID, slotID, status */ \ | |
1818 | 5 ) * sizeof(__be32)) | |
1819 | ||
55c760cf | 1820 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 1821 | { |
55c760cf BF |
1822 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
1823 | ||
373cd409 BF |
1824 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
1825 | return nfserr_toosmall; | |
1826 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
1827 | return nfserr_toosmall; | |
55c760cf BF |
1828 | ca->headerpadsz = 0; |
1829 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
1830 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
1831 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
1832 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
1833 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
1834 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
1835 | /* | |
1836 | * Note decreasing slot size below client's request may make it | |
1837 | * difficult for client to function correctly, whereas | |
1838 | * decreasing the number of slots will (just?) affect | |
1839 | * performance. When short on memory we therefore prefer to | |
1840 | * decrease number of slots instead of their size. Clients that | |
1841 | * request larger slots than they need will get poor results: | |
1842 | */ | |
1843 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
1844 | if (!ca->maxreqs) | |
1845 | return nfserr_jukebox; | |
1846 | ||
373cd409 | 1847 | return nfs_ok; |
1b74c25b MJ |
1848 | } |
1849 | ||
06b332a5 | 1850 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 1851 | { |
06b332a5 BF |
1852 | ca->headerpadsz = 0; |
1853 | ||
1854 | /* | |
1855 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
1856 | * don't even do gss on the backchannel yet. But this is still | |
1857 | * less than 1k. Tighten up this estimate in the unlikely event | |
1858 | * it turns out to be a problem for some client: | |
1859 | */ | |
1860 | if (ca->maxreq_sz < NFS4_enc_cb_recall_sz + RPC_MAX_HEADER_WITH_AUTH) | |
1861 | return nfserr_toosmall; | |
1862 | if (ca->maxresp_sz < NFS4_dec_cb_recall_sz + RPC_MAX_REPHEADER_WITH_AUTH) | |
1863 | return nfserr_toosmall; | |
1864 | ca->maxresp_cached = 0; | |
1865 | if (ca->maxops < 2) | |
1866 | return nfserr_toosmall; | |
1867 | ||
1868 | return nfs_ok; | |
1b74c25b MJ |
1869 | } |
1870 | ||
b78724b7 BF |
1871 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
1872 | { | |
1873 | switch (cbs->flavor) { | |
1874 | case RPC_AUTH_NULL: | |
1875 | case RPC_AUTH_UNIX: | |
1876 | return nfs_ok; | |
1877 | default: | |
1878 | /* | |
1879 | * GSS case: the spec doesn't allow us to return this | |
1880 | * error. But it also doesn't allow us not to support | |
1881 | * GSS. | |
1882 | * I'd rather this fail hard than return some error the | |
1883 | * client might think it can already handle: | |
1884 | */ | |
1885 | return nfserr_encr_alg_unsupp; | |
1886 | } | |
1887 | } | |
1888 | ||
069b6ad4 AA |
1889 | __be32 |
1890 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1891 | struct nfsd4_compound_state *cstate, | |
1892 | struct nfsd4_create_session *cr_ses) | |
1893 | { | |
363168b4 | 1894 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1895 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1896 | struct nfsd4_session *new; |
81f0b2a4 | 1897 | struct nfsd4_conn *conn; |
49557cc7 | 1898 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1899 | __be32 status = 0; |
8daae4dc | 1900 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 1901 | |
a62573dc MJ |
1902 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1903 | return nfserr_inval; | |
b78724b7 BF |
1904 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
1905 | if (status) | |
1906 | return status; | |
55c760cf | 1907 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
1908 | if (status) |
1909 | return status; | |
1910 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 BF |
1911 | if (status) |
1912 | return status; | |
81f0b2a4 | 1913 | status = nfserr_jukebox; |
55c760cf BF |
1914 | new = alloc_session(&cr_ses->fore_channel); |
1915 | if (!new) | |
1916 | goto out_release_drc_mem; | |
81f0b2a4 BF |
1917 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
1918 | if (!conn) | |
1919 | goto out_free_session; | |
a62573dc | 1920 | |
ec6b5d7b | 1921 | nfs4_lock_state(); |
0a7ec377 | 1922 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 1923 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 1924 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
1925 | |
1926 | if (conf) { | |
57266a6e BF |
1927 | status = nfserr_wrong_cred; |
1928 | if (!mach_creds_match(conf, rqstp)) | |
1929 | goto out_free_conn; | |
49557cc7 AA |
1930 | cs_slot = &conf->cl_cs_slot; |
1931 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1932 | if (status == nfserr_replay_cache) { |
49557cc7 | 1933 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1934 | goto out_free_conn; |
49557cc7 | 1935 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1936 | status = nfserr_seq_misordered; |
81f0b2a4 | 1937 | goto out_free_conn; |
ec6b5d7b | 1938 | } |
ec6b5d7b | 1939 | } else if (unconf) { |
8f9d3d3b | 1940 | struct nfs4_client *old; |
ec6b5d7b | 1941 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1942 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1943 | status = nfserr_clid_inuse; |
81f0b2a4 | 1944 | goto out_free_conn; |
ec6b5d7b | 1945 | } |
57266a6e BF |
1946 | status = nfserr_wrong_cred; |
1947 | if (!mach_creds_match(unconf, rqstp)) | |
1948 | goto out_free_conn; | |
49557cc7 AA |
1949 | cs_slot = &unconf->cl_cs_slot; |
1950 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1951 | if (status) { |
1952 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1953 | status = nfserr_seq_misordered; |
81f0b2a4 | 1954 | goto out_free_conn; |
ec6b5d7b | 1955 | } |
382a62e7 | 1956 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
1957 | if (old) { |
1958 | status = mark_client_expired(old); | |
1959 | if (status) | |
1960 | goto out_free_conn; | |
8f9d3d3b | 1961 | expire_client(old); |
221a6876 | 1962 | } |
8f9d3d3b | 1963 | move_to_confirmed(unconf); |
ec6b5d7b AA |
1964 | conf = unconf; |
1965 | } else { | |
1966 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1967 | goto out_free_conn; |
ec6b5d7b | 1968 | } |
81f0b2a4 | 1969 | status = nfs_ok; |
408b79bc BF |
1970 | /* |
1971 | * We do not support RDMA or persistent sessions | |
1972 | */ | |
1973 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1974 | cr_ses->flags &= ~SESSION4_RDMA; | |
1975 | ||
81f0b2a4 BF |
1976 | init_session(rqstp, new, conf, cr_ses); |
1977 | nfsd4_init_conn(rqstp, conn, new); | |
1978 | ||
ac7c46f2 | 1979 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1980 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 1981 | cs_slot->sl_seqid++; |
49557cc7 | 1982 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1983 | |
49557cc7 AA |
1984 | /* cache solo and embedded create sessions under the state lock */ |
1985 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 1986 | nfs4_unlock_state(); |
ec6b5d7b | 1987 | return status; |
81f0b2a4 | 1988 | out_free_conn: |
266533c6 | 1989 | nfs4_unlock_state(); |
81f0b2a4 BF |
1990 | free_conn(conn); |
1991 | out_free_session: | |
1992 | __free_session(new); | |
55c760cf BF |
1993 | out_release_drc_mem: |
1994 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 1995 | return status; |
069b6ad4 AA |
1996 | } |
1997 | ||
1d1bc8f2 BF |
1998 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1999 | { | |
2000 | switch (*dir) { | |
2001 | case NFS4_CDFC4_FORE: | |
2002 | case NFS4_CDFC4_BACK: | |
2003 | return nfs_ok; | |
2004 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2005 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2006 | *dir = NFS4_CDFC4_BOTH; | |
2007 | return nfs_ok; | |
2008 | }; | |
2009 | return nfserr_inval; | |
2010 | } | |
2011 | ||
cb73a9f4 BF |
2012 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2013 | { | |
2014 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2015 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2016 | __be32 status; |
cb73a9f4 | 2017 | |
b78724b7 BF |
2018 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2019 | if (status) | |
2020 | return status; | |
c9a49628 | 2021 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2022 | session->se_cb_prog = bc->bc_cb_program; |
2023 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2024 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2025 | |
2026 | nfsd4_probe_callback(session->se_client); | |
2027 | ||
2028 | return nfs_ok; | |
2029 | } | |
2030 | ||
1d1bc8f2 BF |
2031 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2032 | struct nfsd4_compound_state *cstate, | |
2033 | struct nfsd4_bind_conn_to_session *bcts) | |
2034 | { | |
2035 | __be32 status; | |
3ba63671 | 2036 | struct nfsd4_conn *conn; |
4f6e6c17 | 2037 | struct nfsd4_session *session; |
c9a49628 | 2038 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1d1bc8f2 BF |
2039 | |
2040 | if (!nfsd4_last_compound_op(rqstp)) | |
2041 | return nfserr_not_only_op; | |
4f6e6c17 | 2042 | nfs4_lock_state(); |
c9a49628 | 2043 | spin_lock(&nn->client_lock); |
4f6e6c17 | 2044 | session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
c9a49628 | 2045 | spin_unlock(&nn->client_lock); |
4f6e6c17 BF |
2046 | status = nfserr_badsession; |
2047 | if (!session) | |
2048 | goto out; | |
57266a6e BF |
2049 | status = nfserr_wrong_cred; |
2050 | if (!mach_creds_match(session->se_client, rqstp)) | |
2051 | goto out; | |
1d1bc8f2 | 2052 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2053 | if (status) |
4f6e6c17 | 2054 | goto out; |
3ba63671 | 2055 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2056 | status = nfserr_jukebox; |
3ba63671 | 2057 | if (!conn) |
4f6e6c17 BF |
2058 | goto out; |
2059 | nfsd4_init_conn(rqstp, conn, session); | |
2060 | status = nfs_ok; | |
2061 | out: | |
2062 | nfs4_unlock_state(); | |
2063 | return status; | |
1d1bc8f2 BF |
2064 | } |
2065 | ||
5d4cec2f BF |
2066 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2067 | { | |
2068 | if (!session) | |
2069 | return 0; | |
2070 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2071 | } | |
2072 | ||
069b6ad4 AA |
2073 | __be32 |
2074 | nfsd4_destroy_session(struct svc_rqst *r, | |
2075 | struct nfsd4_compound_state *cstate, | |
2076 | struct nfsd4_destroy_session *sessionid) | |
2077 | { | |
e10e0cfc | 2078 | struct nfsd4_session *ses; |
abcdff09 | 2079 | __be32 status; |
f0f51f5c | 2080 | int ref_held_by_me = 0; |
c9a49628 | 2081 | struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); |
e10e0cfc | 2082 | |
abcdff09 BF |
2083 | nfs4_lock_state(); |
2084 | status = nfserr_not_only_op; | |
5d4cec2f | 2085 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2086 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2087 | goto out; |
f0f51f5c | 2088 | ref_held_by_me++; |
57716355 | 2089 | } |
e10e0cfc | 2090 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2091 | spin_lock(&nn->client_lock); |
1872de0e | 2092 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
abcdff09 BF |
2093 | status = nfserr_badsession; |
2094 | if (!ses) | |
2095 | goto out_client_lock; | |
57266a6e BF |
2096 | status = nfserr_wrong_cred; |
2097 | if (!mach_creds_match(ses->se_client, r)) | |
66b2b9b2 | 2098 | goto out_client_lock; |
f0f51f5c BF |
2099 | nfsd4_get_session_locked(ses); |
2100 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); | |
66b2b9b2 | 2101 | if (status) |
f0f51f5c | 2102 | goto out_put_session; |
e10e0cfc | 2103 | unhash_session(ses); |
c9a49628 | 2104 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2105 | |
84f5f7cc | 2106 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2107 | |
c9a49628 | 2108 | spin_lock(&nn->client_lock); |
e10e0cfc | 2109 | status = nfs_ok; |
f0f51f5c BF |
2110 | out_put_session: |
2111 | nfsd4_put_session(ses); | |
abcdff09 BF |
2112 | out_client_lock: |
2113 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2114 | out: |
abcdff09 | 2115 | nfs4_unlock_state(); |
e10e0cfc | 2116 | return status; |
069b6ad4 AA |
2117 | } |
2118 | ||
a663bdd8 | 2119 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2120 | { |
2121 | struct nfsd4_conn *c; | |
2122 | ||
2123 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2124 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2125 | return c; |
2126 | } | |
2127 | } | |
2128 | return NULL; | |
2129 | } | |
2130 | ||
57266a6e | 2131 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2132 | { |
2133 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2134 | struct nfsd4_conn *c; |
57266a6e | 2135 | __be32 status = nfs_ok; |
21b75b01 | 2136 | int ret; |
328ead28 BF |
2137 | |
2138 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2139 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2140 | if (c) |
2141 | goto out_free; | |
2142 | status = nfserr_conn_not_bound_to_session; | |
2143 | if (clp->cl_mach_cred) | |
2144 | goto out_free; | |
328ead28 BF |
2145 | __nfsd4_hash_conn(new, ses); |
2146 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2147 | ret = nfsd4_register_conn(new); |
2148 | if (ret) | |
2149 | /* oops; xprt is already down: */ | |
2150 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2151 | return nfs_ok; |
2152 | out_free: | |
2153 | spin_unlock(&clp->cl_lock); | |
2154 | free_conn(new); | |
2155 | return status; | |
328ead28 BF |
2156 | } |
2157 | ||
868b89c3 MJ |
2158 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2159 | { | |
2160 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2161 | ||
2162 | return args->opcnt > session->se_fchannel.maxops; | |
2163 | } | |
2164 | ||
ae82a8d0 MJ |
2165 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2166 | struct nfsd4_session *session) | |
2167 | { | |
2168 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2169 | ||
2170 | return xb->len > session->se_fchannel.maxreq_sz; | |
2171 | } | |
2172 | ||
069b6ad4 | 2173 | __be32 |
b85d4c01 | 2174 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2175 | struct nfsd4_compound_state *cstate, |
2176 | struct nfsd4_sequence *seq) | |
2177 | { | |
f9bb94c4 | 2178 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 | 2179 | struct nfsd4_session *session; |
221a6876 | 2180 | struct nfs4_client *clp; |
b85d4c01 | 2181 | struct nfsd4_slot *slot; |
a663bdd8 | 2182 | struct nfsd4_conn *conn; |
57b7b43b | 2183 | __be32 status; |
c9a49628 | 2184 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b85d4c01 | 2185 | |
f9bb94c4 AA |
2186 | if (resp->opcnt != 1) |
2187 | return nfserr_sequence_pos; | |
2188 | ||
a663bdd8 BF |
2189 | /* |
2190 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2191 | * below. | |
2192 | */ | |
2193 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2194 | if (!conn) | |
2195 | return nfserr_jukebox; | |
2196 | ||
c9a49628 | 2197 | spin_lock(&nn->client_lock); |
b85d4c01 | 2198 | status = nfserr_badsession; |
1872de0e | 2199 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
b85d4c01 | 2200 | if (!session) |
221a6876 BF |
2201 | goto out_no_session; |
2202 | clp = session->se_client; | |
2203 | status = get_client_locked(clp); | |
2204 | if (status) | |
2205 | goto out_no_session; | |
66b2b9b2 BF |
2206 | status = nfsd4_get_session_locked(session); |
2207 | if (status) | |
2208 | goto out_put_client; | |
b85d4c01 | 2209 | |
868b89c3 MJ |
2210 | status = nfserr_too_many_ops; |
2211 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2212 | goto out_put_session; |
868b89c3 | 2213 | |
ae82a8d0 MJ |
2214 | status = nfserr_req_too_big; |
2215 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2216 | goto out_put_session; |
ae82a8d0 | 2217 | |
b85d4c01 | 2218 | status = nfserr_badslot; |
6c18ba9f | 2219 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2220 | goto out_put_session; |
b85d4c01 | 2221 | |
557ce264 | 2222 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2223 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2224 | ||
a8dfdaeb AA |
2225 | /* We do not negotiate the number of slots yet, so set the |
2226 | * maxslots to the session maxreqs which is used to encode | |
2227 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2228 | seq->maxslots = session->se_fchannel.maxreqs; | |
2229 | ||
73e79482 BF |
2230 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2231 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2232 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2233 | status = nfserr_seq_misordered; |
2234 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2235 | goto out_put_session; |
b85d4c01 BH |
2236 | cstate->slot = slot; |
2237 | cstate->session = session; | |
da3846a2 | 2238 | /* Return the cached reply status and set cstate->status |
557ce264 | 2239 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2240 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2241 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2242 | goto out; |
b85d4c01 BH |
2243 | } |
2244 | if (status) | |
66b2b9b2 | 2245 | goto out_put_session; |
b85d4c01 | 2246 | |
57266a6e | 2247 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2248 | conn = NULL; |
57266a6e BF |
2249 | if (status) |
2250 | goto out_put_session; | |
328ead28 | 2251 | |
b85d4c01 | 2252 | /* Success! bump slot seqid */ |
b85d4c01 | 2253 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2254 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2255 | if (seq->cachethis) |
2256 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2257 | else |
2258 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2259 | |
2260 | cstate->slot = slot; | |
2261 | cstate->session = session; | |
2262 | ||
b85d4c01 | 2263 | out: |
221a6876 BF |
2264 | switch (clp->cl_cb_state) { |
2265 | case NFSD4_CB_DOWN: | |
2266 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2267 | break; | |
2268 | case NFSD4_CB_FAULT: | |
2269 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2270 | break; | |
2271 | default: | |
2272 | seq->status_flags = 0; | |
aaf84eb9 | 2273 | } |
3bd64a5b BF |
2274 | if (!list_empty(&clp->cl_revoked)) |
2275 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2276 | out_no_session: |
a663bdd8 | 2277 | kfree(conn); |
c9a49628 | 2278 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2279 | return status; |
66b2b9b2 BF |
2280 | out_put_session: |
2281 | nfsd4_put_session(session); | |
221a6876 BF |
2282 | out_put_client: |
2283 | put_client_renew_locked(clp); | |
2284 | goto out_no_session; | |
069b6ad4 AA |
2285 | } |
2286 | ||
345c2842 MJ |
2287 | __be32 |
2288 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2289 | { | |
2290 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2291 | __be32 status = 0; |
8daae4dc | 2292 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2293 | |
2294 | nfs4_lock_state(); | |
0a7ec377 | 2295 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2296 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2297 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2298 | |
2299 | if (conf) { | |
2300 | clp = conf; | |
2301 | ||
c0293b01 | 2302 | if (client_has_state(conf)) { |
345c2842 MJ |
2303 | status = nfserr_clientid_busy; |
2304 | goto out; | |
2305 | } | |
2306 | } else if (unconf) | |
2307 | clp = unconf; | |
2308 | else { | |
2309 | status = nfserr_stale_clientid; | |
2310 | goto out; | |
2311 | } | |
57266a6e BF |
2312 | if (!mach_creds_match(clp, rqstp)) { |
2313 | status = nfserr_wrong_cred; | |
2314 | goto out; | |
2315 | } | |
345c2842 MJ |
2316 | expire_client(clp); |
2317 | out: | |
2318 | nfs4_unlock_state(); | |
345c2842 MJ |
2319 | return status; |
2320 | } | |
2321 | ||
4dc6ec00 BF |
2322 | __be32 |
2323 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2324 | { | |
57b7b43b | 2325 | __be32 status = 0; |
bcecf1cc | 2326 | |
4dc6ec00 BF |
2327 | if (rc->rca_one_fs) { |
2328 | if (!cstate->current_fh.fh_dentry) | |
2329 | return nfserr_nofilehandle; | |
2330 | /* | |
2331 | * We don't take advantage of the rca_one_fs case. | |
2332 | * That's OK, it's optional, we can safely ignore it. | |
2333 | */ | |
2334 | return nfs_ok; | |
2335 | } | |
bcecf1cc | 2336 | |
4dc6ec00 | 2337 | nfs4_lock_state(); |
bcecf1cc | 2338 | status = nfserr_complete_already; |
a52d726b JL |
2339 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2340 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2341 | goto out; |
2342 | ||
2343 | status = nfserr_stale_clientid; | |
2344 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2345 | /* |
2346 | * The following error isn't really legal. | |
2347 | * But we only get here if the client just explicitly | |
2348 | * destroyed the client. Surely it no longer cares what | |
2349 | * error it gets back on an operation for the dead | |
2350 | * client. | |
2351 | */ | |
bcecf1cc MJ |
2352 | goto out; |
2353 | ||
2354 | status = nfs_ok; | |
2a4317c5 | 2355 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2356 | out: |
4dc6ec00 | 2357 | nfs4_unlock_state(); |
bcecf1cc | 2358 | return status; |
4dc6ec00 BF |
2359 | } |
2360 | ||
b37ad28b | 2361 | __be32 |
b591480b BF |
2362 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2363 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2364 | { |
a084daf5 | 2365 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2366 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2367 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2368 | __be32 status; |
c212cecf SK |
2369 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2370 | ||
63db4632 | 2371 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2372 | nfs4_lock_state(); |
382a62e7 | 2373 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2374 | if (conf) { |
63db4632 | 2375 | /* case 0: */ |
1da177e4 | 2376 | status = nfserr_clid_inuse; |
e203d506 BF |
2377 | if (clp_used_exchangeid(conf)) |
2378 | goto out; | |
026722c2 | 2379 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2380 | char addr_str[INET6_ADDRSTRLEN]; |
2381 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2382 | sizeof(addr_str)); | |
2383 | dprintk("NFSD: setclientid: string in use by client " | |
2384 | "at %s\n", addr_str); | |
1da177e4 LT |
2385 | goto out; |
2386 | } | |
1da177e4 | 2387 | } |
a99454aa | 2388 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2389 | if (unconf) |
2390 | expire_client(unconf); | |
3e772463 | 2391 | status = nfserr_jukebox; |
2216d449 | 2392 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2393 | if (new == NULL) |
2394 | goto out; | |
34b232bb | 2395 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2396 | /* case 1: probable callback update */ |
1da177e4 | 2397 | copy_clid(new, conf); |
34b232bb | 2398 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2399 | gen_clid(new, nn); |
8323c3b2 | 2400 | new->cl_minorversion = 0; |
6f3d772f | 2401 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2402 | add_to_unconfirmed(new); |
1da177e4 LT |
2403 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2404 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2405 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2406 | status = nfs_ok; | |
2407 | out: | |
2408 | nfs4_unlock_state(); | |
2409 | return status; | |
2410 | } | |
2411 | ||
2412 | ||
b37ad28b | 2413 | __be32 |
b591480b BF |
2414 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2415 | struct nfsd4_compound_state *cstate, | |
2416 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2417 | { |
21ab45a4 | 2418 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2419 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2420 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2421 | __be32 status; |
7f2210fa | 2422 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2423 | |
2c142baa | 2424 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2425 | return nfserr_stale_clientid; |
1da177e4 | 2426 | nfs4_lock_state(); |
21ab45a4 | 2427 | |
8daae4dc | 2428 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2429 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2430 | /* |
8695b90a BF |
2431 | * We try hard to give out unique clientid's, so if we get an |
2432 | * attempt to confirm the same clientid with a different cred, | |
2433 | * there's a bug somewhere. Let's charitably assume it's our | |
2434 | * bug. | |
a186e767 | 2435 | */ |
8695b90a BF |
2436 | status = nfserr_serverfault; |
2437 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2438 | goto out; | |
2439 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2440 | goto out; | |
63db4632 | 2441 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2442 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2443 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2444 | status = nfs_ok; |
90d700b7 BF |
2445 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2446 | status = nfserr_stale_clientid; | |
2447 | goto out; | |
2448 | } | |
2449 | status = nfs_ok; | |
2450 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2451 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2452 | nfsd4_probe_callback(conf); | |
2453 | expire_client(unconf); | |
90d700b7 | 2454 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2455 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2456 | if (conf) { |
2457 | status = mark_client_expired(conf); | |
2458 | if (status) | |
2459 | goto out; | |
8695b90a | 2460 | expire_client(conf); |
221a6876 | 2461 | } |
8695b90a | 2462 | move_to_confirmed(unconf); |
f3d03b92 | 2463 | nfsd4_probe_callback(unconf); |
08e8987c | 2464 | } |
1da177e4 | 2465 | out: |
1da177e4 LT |
2466 | nfs4_unlock_state(); |
2467 | return status; | |
2468 | } | |
2469 | ||
32513b40 BF |
2470 | static struct nfs4_file *nfsd4_alloc_file(void) |
2471 | { | |
2472 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2473 | } | |
2474 | ||
1da177e4 | 2475 | /* OPEN Share state helper functions */ |
32513b40 | 2476 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2477 | { |
1da177e4 LT |
2478 | unsigned int hashval = file_hashval(ino); |
2479 | ||
32513b40 | 2480 | atomic_set(&fp->fi_ref, 1); |
32513b40 BF |
2481 | INIT_LIST_HEAD(&fp->fi_stateids); |
2482 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2483 | fp->fi_inode = igrab(ino); | |
2484 | fp->fi_had_conflict = false; | |
2485 | fp->fi_lease = NULL; | |
2486 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2487 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2488 | spin_lock(&recall_lock); | |
89876f8c | 2489 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
32513b40 | 2490 | spin_unlock(&recall_lock); |
1da177e4 LT |
2491 | } |
2492 | ||
e60d4398 | 2493 | static void |
e18b890b | 2494 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2495 | { |
e60d4398 N |
2496 | if (*slab == NULL) |
2497 | return; | |
1a1d92c1 | 2498 | kmem_cache_destroy(*slab); |
e60d4398 | 2499 | *slab = NULL; |
1da177e4 LT |
2500 | } |
2501 | ||
e8ff2a84 | 2502 | void |
1da177e4 LT |
2503 | nfsd4_free_slabs(void) |
2504 | { | |
fe0750e5 BF |
2505 | nfsd4_free_slab(&openowner_slab); |
2506 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2507 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2508 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2509 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2510 | } |
1da177e4 | 2511 | |
72083396 | 2512 | int |
e60d4398 N |
2513 | nfsd4_init_slabs(void) |
2514 | { | |
fe0750e5 BF |
2515 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2516 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2517 | if (openowner_slab == NULL) | |
2518 | goto out_nomem; | |
2519 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2520 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2521 | if (lockowner_slab == NULL) |
e60d4398 N |
2522 | goto out_nomem; |
2523 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2524 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2525 | if (file_slab == NULL) |
2526 | goto out_nomem; | |
5ac049ac | 2527 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2528 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2529 | if (stateid_slab == NULL) |
2530 | goto out_nomem; | |
5b2d21c1 | 2531 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2532 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2533 | if (deleg_slab == NULL) |
2534 | goto out_nomem; | |
e60d4398 N |
2535 | return 0; |
2536 | out_nomem: | |
2537 | nfsd4_free_slabs(); | |
2538 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2539 | return -ENOMEM; | |
1da177e4 LT |
2540 | } |
2541 | ||
fe0750e5 BF |
2542 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2543 | { | |
2544 | kfree(oo->oo_owner.so_owner.data); | |
2545 | kmem_cache_free(openowner_slab, oo); | |
2546 | } | |
2547 | ||
2548 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2549 | { |
fe0750e5 BF |
2550 | kfree(lo->lo_owner.so_owner.data); |
2551 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2552 | } |
2553 | ||
ff194bd9 | 2554 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2555 | { |
ff194bd9 BF |
2556 | rp->rp_status = nfserr_serverfault; |
2557 | rp->rp_buflen = 0; | |
2558 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2559 | } |
2560 | ||
fe0750e5 | 2561 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2562 | { |
1da177e4 | 2563 | struct nfs4_stateowner *sop; |
1da177e4 | 2564 | |
fe0750e5 | 2565 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2566 | if (!sop) |
2567 | return NULL; | |
2568 | ||
2569 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2570 | if (!sop->so_owner.data) { | |
fe0750e5 | 2571 | kmem_cache_free(slab, sop); |
1da177e4 | 2572 | return NULL; |
ff194bd9 BF |
2573 | } |
2574 | sop->so_owner.len = owner->len; | |
2575 | ||
ea1da636 | 2576 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2577 | sop->so_client = clp; |
2578 | init_nfs4_replay(&sop->so_replay); | |
2579 | return sop; | |
2580 | } | |
2581 | ||
fe0750e5 | 2582 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2583 | { |
9b531137 SK |
2584 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2585 | ||
2586 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2587 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2588 | } |
2589 | ||
fe0750e5 | 2590 | static struct nfs4_openowner * |
ff194bd9 | 2591 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2592 | struct nfs4_openowner *oo; |
ff194bd9 | 2593 | |
fe0750e5 BF |
2594 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2595 | if (!oo) | |
ff194bd9 | 2596 | return NULL; |
fe0750e5 BF |
2597 | oo->oo_owner.so_is_open_owner = 1; |
2598 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2599 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2600 | oo->oo_time = 0; |
38c387b5 | 2601 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2602 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2603 | hash_openowner(oo, clp, strhashval); | |
2604 | return oo; | |
1da177e4 LT |
2605 | } |
2606 | ||
996e0938 | 2607 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2608 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2609 | |
3abdb607 | 2610 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
ea1da636 | 2611 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2612 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2613 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2614 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2615 | get_nfs4_file(fp); |
1da177e4 | 2616 | stp->st_file = fp; |
1da177e4 LT |
2617 | stp->st_access_bmap = 0; |
2618 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2619 | set_access(open->op_share_access, stp); |
ce0fc43c | 2620 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2621 | stp->st_openstp = NULL; |
1da177e4 LT |
2622 | } |
2623 | ||
fd39ca9a | 2624 | static void |
73758fed | 2625 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2626 | { |
73758fed SK |
2627 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2628 | ||
fe0750e5 | 2629 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2630 | |
73758fed | 2631 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2632 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2633 | } |
2634 | ||
1da177e4 | 2635 | static int |
599e0a22 BF |
2636 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2637 | clientid_t *clid) | |
2638 | { | |
2639 | return (sop->so_owner.len == owner->len) && | |
2640 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2641 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2642 | } |
2643 | ||
fe0750e5 | 2644 | static struct nfs4_openowner * |
9b531137 SK |
2645 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2646 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2647 | { |
a50d2ad1 BF |
2648 | struct nfs4_stateowner *so; |
2649 | struct nfs4_openowner *oo; | |
d15c077e | 2650 | struct nfs4_client *clp; |
1da177e4 | 2651 | |
9b531137 | 2652 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2653 | if (!so->so_is_open_owner) |
2654 | continue; | |
a50d2ad1 BF |
2655 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2656 | oo = openowner(so); | |
d15c077e BF |
2657 | clp = oo->oo_owner.so_client; |
2658 | if ((bool)clp->cl_minorversion != sessions) | |
2659 | return NULL; | |
a50d2ad1 BF |
2660 | renew_client(oo->oo_owner.so_client); |
2661 | return oo; | |
2662 | } | |
1da177e4 LT |
2663 | } |
2664 | return NULL; | |
2665 | } | |
2666 | ||
2667 | /* search file_hashtbl[] for file */ | |
2668 | static struct nfs4_file * | |
2669 | find_file(struct inode *ino) | |
2670 | { | |
2671 | unsigned int hashval = file_hashval(ino); | |
2672 | struct nfs4_file *fp; | |
2673 | ||
8b671b80 | 2674 | spin_lock(&recall_lock); |
89876f8c | 2675 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2676 | if (fp->fi_inode == ino) { |
2677 | get_nfs4_file(fp); | |
8b671b80 | 2678 | spin_unlock(&recall_lock); |
1da177e4 | 2679 | return fp; |
13cd2184 | 2680 | } |
1da177e4 | 2681 | } |
8b671b80 | 2682 | spin_unlock(&recall_lock); |
1da177e4 LT |
2683 | return NULL; |
2684 | } | |
2685 | ||
1da177e4 LT |
2686 | /* |
2687 | * Called to check deny when READ with all zero stateid or | |
2688 | * WRITE with all zero or all one stateid | |
2689 | */ | |
b37ad28b | 2690 | static __be32 |
1da177e4 LT |
2691 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2692 | { | |
2693 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2694 | struct nfs4_file *fp; | |
dcef0413 | 2695 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2696 | __be32 ret; |
1da177e4 | 2697 | |
1da177e4 | 2698 | fp = find_file(ino); |
13cd2184 N |
2699 | if (!fp) |
2700 | return nfs_ok; | |
b700949b | 2701 | ret = nfserr_locked; |
1da177e4 | 2702 | /* Search for conflicting share reservations */ |
13cd2184 | 2703 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2704 | if (test_deny(deny_type, stp) || |
2705 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2706 | goto out; |
1da177e4 | 2707 | } |
13cd2184 N |
2708 | ret = nfs_ok; |
2709 | out: | |
2710 | put_nfs4_file(fp); | |
2711 | return ret; | |
1da177e4 LT |
2712 | } |
2713 | ||
6b57d9c8 | 2714 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2715 | { |
e8c69d17 BF |
2716 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
2717 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2718 | ||
1da177e4 LT |
2719 | /* We're assuming the state code never drops its reference |
2720 | * without first removing the lease. Since we're in this lease | |
2721 | * callback (and since the lease code is serialized by the kernel | |
2722 | * lock) we know the server hasn't removed the lease yet, we know | |
2723 | * it's safe to take a reference: */ | |
2724 | atomic_inc(&dp->dl_count); | |
2725 | ||
e8c69d17 | 2726 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
1da177e4 | 2727 | |
1c8c601a | 2728 | /* Only place dl_time is set; protected by i_lock: */ |
1da177e4 LT |
2729 | dp->dl_time = get_seconds(); |
2730 | ||
6b57d9c8 BF |
2731 | nfsd4_cb_recall(dp); |
2732 | } | |
2733 | ||
1c8c601a | 2734 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
2735 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2736 | { | |
acfdf5c3 BF |
2737 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2738 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2739 | |
7fa10cd1 BF |
2740 | if (!fp) { |
2741 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2742 | return; | |
2743 | } | |
2744 | if (fp->fi_had_conflict) { | |
2745 | WARN(1, "duplicate break on %p\n", fp); | |
2746 | return; | |
2747 | } | |
0272e1fd BF |
2748 | /* |
2749 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2750 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2751 | * in time: |
0272e1fd BF |
2752 | */ |
2753 | fl->fl_break_time = 0; | |
1da177e4 | 2754 | |
5d926e8c | 2755 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2756 | fp->fi_had_conflict = true; |
2757 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2758 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2759 | spin_unlock(&recall_lock); |
1da177e4 LT |
2760 | } |
2761 | ||
1da177e4 LT |
2762 | static |
2763 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2764 | { | |
2765 | if (arg & F_UNLCK) | |
2766 | return lease_modify(onlist, arg); | |
2767 | else | |
2768 | return -EAGAIN; | |
2769 | } | |
2770 | ||
7b021967 | 2771 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2772 | .lm_break = nfsd_break_deleg_cb, |
2773 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2774 | }; |
2775 | ||
7a8711c9 BF |
2776 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2777 | { | |
2778 | if (nfsd4_has_session(cstate)) | |
2779 | return nfs_ok; | |
2780 | if (seqid == so->so_seqid - 1) | |
2781 | return nfserr_replay_me; | |
2782 | if (seqid == so->so_seqid) | |
2783 | return nfs_ok; | |
2784 | return nfserr_bad_seqid; | |
2785 | } | |
1da177e4 | 2786 | |
b37ad28b | 2787 | __be32 |
6668958f | 2788 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 2789 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 2790 | { |
1da177e4 LT |
2791 | clientid_t *clientid = &open->op_clientid; |
2792 | struct nfs4_client *clp = NULL; | |
2793 | unsigned int strhashval; | |
fe0750e5 | 2794 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2795 | __be32 status; |
1da177e4 | 2796 | |
2c142baa | 2797 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2798 | return nfserr_stale_clientid; |
32513b40 BF |
2799 | /* |
2800 | * In case we need it later, after we've already created the | |
2801 | * file and don't want to risk a further failure: | |
2802 | */ | |
2803 | open->op_file = nfsd4_alloc_file(); | |
2804 | if (open->op_file == NULL) | |
2805 | return nfserr_jukebox; | |
1da177e4 | 2806 | |
16bfdaaf | 2807 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 2808 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
2809 | open->op_openowner = oo; |
2810 | if (!oo) { | |
8daae4dc SK |
2811 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2812 | nn); | |
1da177e4 | 2813 | if (clp == NULL) |
0f442aa2 | 2814 | return nfserr_expired; |
bcf130f9 | 2815 | goto new_owner; |
1da177e4 | 2816 | } |
dad1c067 | 2817 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2818 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2819 | clp = oo->oo_owner.so_client; |
2820 | release_openowner(oo); | |
2821 | open->op_openowner = NULL; | |
bcf130f9 | 2822 | goto new_owner; |
0f442aa2 | 2823 | } |
4cdc951b BF |
2824 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2825 | if (status) | |
2826 | return status; | |
2827 | clp = oo->oo_owner.so_client; | |
2828 | goto alloc_stateid; | |
bcf130f9 BF |
2829 | new_owner: |
2830 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2831 | if (oo == NULL) | |
2832 | return nfserr_jukebox; | |
2833 | open->op_openowner = oo; | |
4cdc951b BF |
2834 | alloc_stateid: |
2835 | open->op_stp = nfs4_alloc_stateid(clp); | |
2836 | if (!open->op_stp) | |
2837 | return nfserr_jukebox; | |
0f442aa2 | 2838 | return nfs_ok; |
1da177e4 LT |
2839 | } |
2840 | ||
b37ad28b | 2841 | static inline __be32 |
4a6e43e6 N |
2842 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2843 | { | |
2844 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2845 | return nfserr_openmode; | |
2846 | else | |
2847 | return nfs_ok; | |
2848 | } | |
2849 | ||
f459e453 | 2850 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2851 | { |
f459e453 | 2852 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2853 | } |
2854 | ||
38c2f4b1 | 2855 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2856 | { |
f459e453 | 2857 | struct nfs4_stid *ret; |
24a0111e | 2858 | |
38c2f4b1 | 2859 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2860 | if (!ret) |
2861 | return NULL; | |
2862 | return delegstateid(ret); | |
24a0111e BF |
2863 | } |
2864 | ||
8b289b2c BF |
2865 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2866 | { | |
2867 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2868 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2869 | } | |
2870 | ||
b37ad28b | 2871 | static __be32 |
41d22663 | 2872 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
2873 | struct nfs4_delegation **dp) |
2874 | { | |
2875 | int flags; | |
b37ad28b | 2876 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2877 | |
38c2f4b1 | 2878 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2879 | if (*dp == NULL) |
c44c5eeb | 2880 | goto out; |
24a0111e | 2881 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2882 | status = nfs4_check_delegmode(*dp, flags); |
2883 | if (status) | |
2884 | *dp = NULL; | |
c44c5eeb | 2885 | out: |
8b289b2c | 2886 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2887 | return nfs_ok; |
2888 | if (status) | |
2889 | return status; | |
dad1c067 | 2890 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2891 | return nfs_ok; |
567d9829 N |
2892 | } |
2893 | ||
b37ad28b | 2894 | static __be32 |
dcef0413 | 2895 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2896 | { |
dcef0413 | 2897 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2898 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2899 | |
8beefa24 | 2900 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2901 | /* ignore lock owners */ |
2902 | if (local->st_stateowner->so_is_open_owner == 0) | |
2903 | continue; | |
2904 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2905 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2906 | *stpp = local; |
2907 | /* check for conflicting share reservations */ | |
2908 | if (!test_share(local, open)) | |
77eaae8d | 2909 | return nfserr_share_denied; |
1da177e4 | 2910 | } |
77eaae8d | 2911 | return nfs_ok; |
1da177e4 LT |
2912 | } |
2913 | ||
21fb4016 BF |
2914 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2915 | { | |
2916 | int flags = 0; | |
2917 | ||
2918 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2919 | flags |= NFSD_MAY_READ; | |
2920 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2921 | flags |= NFSD_MAY_WRITE; | |
2922 | return flags; | |
2923 | } | |
2924 | ||
0c12eaff CB |
2925 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2926 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2927 | { |
2928 | __be32 status; | |
0c12eaff CB |
2929 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2930 | int access = nfs4_access_to_access(open->op_share_access); | |
2931 | ||
f9d7562f BF |
2932 | if (!fp->fi_fds[oflag]) { |
2933 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2934 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2935 | if (status) |
2936 | return status; | |
2937 | } | |
2938 | nfs4_file_get_access(fp, oflag); | |
2939 | ||
2940 | return nfs_ok; | |
2941 | } | |
2942 | ||
b37ad28b | 2943 | static inline __be32 |
1da177e4 LT |
2944 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2945 | struct nfsd4_open *open) | |
2946 | { | |
2947 | struct iattr iattr = { | |
2948 | .ia_valid = ATTR_SIZE, | |
2949 | .ia_size = 0, | |
2950 | }; | |
2951 | if (!open->op_truncate) | |
2952 | return 0; | |
2953 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2954 | return nfserr_inval; |
1da177e4 LT |
2955 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2956 | } | |
2957 | ||
b37ad28b | 2958 | static __be32 |
dcef0413 | 2959 | 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 | 2960 | { |
b6d2f1ca | 2961 | u32 op_share_access = open->op_share_access; |
7d947842 | 2962 | bool new_access; |
b37ad28b | 2963 | __be32 status; |
1da177e4 | 2964 | |
82c5ff1b | 2965 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2966 | if (new_access) { |
0c12eaff | 2967 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2968 | if (status) |
2969 | return status; | |
6c26d08f | 2970 | } |
1da177e4 LT |
2971 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2972 | if (status) { | |
f9d7562f | 2973 | if (new_access) { |
f197c271 | 2974 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2975 | nfs4_file_put_access(fp, oflag); |
2976 | } | |
1da177e4 LT |
2977 | return status; |
2978 | } | |
2979 | /* remember the open */ | |
82c5ff1b | 2980 | set_access(op_share_access, stp); |
ce0fc43c | 2981 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2982 | |
2983 | return nfs_ok; | |
2984 | } | |
2985 | ||
2986 | ||
1da177e4 | 2987 | static void |
1255a8f3 | 2988 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2989 | { |
dad1c067 | 2990 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2991 | } |
2992 | ||
14a24e99 BF |
2993 | /* Should we give out recallable state?: */ |
2994 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2995 | { | |
2996 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2997 | return true; | |
2998 | /* | |
2999 | * In the sessions case, since we don't have to establish a | |
3000 | * separate connection for callbacks, we assume it's OK | |
3001 | * until we hear otherwise: | |
3002 | */ | |
3003 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3004 | } | |
3005 | ||
22d38c4c BF |
3006 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
3007 | { | |
3008 | struct file_lock *fl; | |
3009 | ||
3010 | fl = locks_alloc_lock(); | |
3011 | if (!fl) | |
3012 | return NULL; | |
3013 | locks_init_lock(fl); | |
3014 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
3015 | fl->fl_flags = FL_LEASE; | |
3016 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
3017 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 3018 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 3019 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3020 | return fl; |
3021 | } | |
3022 | ||
99c41515 | 3023 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3024 | { |
acfdf5c3 | 3025 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
3026 | struct file_lock *fl; |
3027 | int status; | |
3028 | ||
99c41515 | 3029 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3030 | if (!fl) |
3031 | return -ENOMEM; | |
acfdf5c3 | 3032 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 3033 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 3034 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 3035 | if (status) { |
acfdf5c3 | 3036 | list_del_init(&dp->dl_perclnt); |
edab9782 | 3037 | locks_free_lock(fl); |
b1948a64 | 3038 | return status; |
edab9782 | 3039 | } |
acfdf5c3 | 3040 | fp->fi_lease = fl; |
cb0942b8 | 3041 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
3042 | atomic_set(&fp->fi_delegees, 1); |
3043 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
3044 | return 0; | |
3045 | } | |
3046 | ||
99c41515 | 3047 | static int nfs4_set_delegation(struct nfs4_delegation *dp) |
acfdf5c3 BF |
3048 | { |
3049 | struct nfs4_file *fp = dp->dl_file; | |
3050 | ||
3051 | if (!fp->fi_lease) | |
99c41515 | 3052 | return nfs4_setlease(dp); |
acfdf5c3 BF |
3053 | spin_lock(&recall_lock); |
3054 | if (fp->fi_had_conflict) { | |
3055 | spin_unlock(&recall_lock); | |
3056 | return -EAGAIN; | |
3057 | } | |
3058 | atomic_inc(&fp->fi_delegees); | |
3059 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
3060 | spin_unlock(&recall_lock); | |
2a74aba7 | 3061 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
3062 | return 0; |
3063 | } | |
3064 | ||
4aa8913c BH |
3065 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3066 | { | |
3067 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3068 | if (status == -EAGAIN) | |
3069 | open->op_why_no_deleg = WND4_CONTENTION; | |
3070 | else { | |
3071 | open->op_why_no_deleg = WND4_RESOURCE; | |
3072 | switch (open->op_deleg_want) { | |
3073 | case NFS4_SHARE_WANT_READ_DELEG: | |
3074 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3075 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3076 | break; | |
3077 | case NFS4_SHARE_WANT_CANCEL: | |
3078 | open->op_why_no_deleg = WND4_CANCELLED; | |
3079 | break; | |
3080 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3081 | WARN_ON_ONCE(1); |
4aa8913c BH |
3082 | } |
3083 | } | |
3084 | } | |
3085 | ||
1da177e4 LT |
3086 | /* |
3087 | * Attempt to hand out a delegation. | |
99c41515 BF |
3088 | * |
3089 | * Note we don't support write delegations, and won't until the vfs has | |
3090 | * proper support for them. | |
1da177e4 LT |
3091 | */ |
3092 | static void | |
5ccb0066 SK |
3093 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
3094 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3095 | { |
3096 | struct nfs4_delegation *dp; | |
fe0750e5 | 3097 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 3098 | int cb_up; |
99c41515 | 3099 | int status = 0; |
1da177e4 | 3100 | |
fe0750e5 | 3101 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3102 | open->op_recall = 0; |
3103 | switch (open->op_claim_type) { | |
3104 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3105 | if (!cb_up) |
7b190fec | 3106 | open->op_recall = 1; |
99c41515 BF |
3107 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3108 | goto out_no_deleg; | |
7b190fec N |
3109 | break; |
3110 | case NFS4_OPEN_CLAIM_NULL: | |
99c41515 BF |
3111 | /* |
3112 | * Let's not give out any delegations till everyone's | |
3113 | * had the chance to reclaim theirs.... | |
3114 | */ | |
5ccb0066 | 3115 | if (locks_in_grace(net)) |
99c41515 | 3116 | goto out_no_deleg; |
dad1c067 | 3117 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3118 | goto out_no_deleg; |
9a0590ae SD |
3119 | /* |
3120 | * Also, if the file was opened for write or | |
3121 | * create, there's a good chance the client's | |
3122 | * about to write to it, resulting in an | |
3123 | * immediate recall (since we don't support | |
3124 | * write delegations): | |
3125 | */ | |
7b190fec | 3126 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3127 | goto out_no_deleg; |
3128 | if (open->op_create == NFS4_OPEN_CREATE) | |
3129 | goto out_no_deleg; | |
7b190fec N |
3130 | break; |
3131 | default: | |
99c41515 | 3132 | goto out_no_deleg; |
7b190fec | 3133 | } |
99c41515 | 3134 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh); |
dd239cc0 BF |
3135 | if (dp == NULL) |
3136 | goto out_no_deleg; | |
99c41515 | 3137 | status = nfs4_set_delegation(dp); |
edab9782 | 3138 | if (status) |
dd239cc0 | 3139 | goto out_free; |
1da177e4 | 3140 | |
d5477a8d | 3141 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3142 | |
8c10cbdb | 3143 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3144 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3145 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
dd239cc0 BF |
3146 | return; |
3147 | out_free: | |
24ffb938 | 3148 | unhash_stid(&dp->dl_stid); |
acfdf5c3 | 3149 | nfs4_put_delegation(dp); |
dd239cc0 | 3150 | out_no_deleg: |
99c41515 BF |
3151 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3152 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3153 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3154 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3155 | open->op_recall = 1; |
3156 | } | |
99c41515 BF |
3157 | |
3158 | /* 4.1 client asking for a delegation? */ | |
3159 | if (open->op_deleg_want) | |
3160 | nfsd4_open_deleg_none_ext(open, status); | |
3161 | return; | |
1da177e4 LT |
3162 | } |
3163 | ||
e27f49c3 BH |
3164 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3165 | struct nfs4_delegation *dp) | |
3166 | { | |
3167 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3168 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3169 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3170 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3171 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3172 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3173 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3174 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3175 | } | |
3176 | /* Otherwise the client must be confused wanting a delegation | |
3177 | * it already has, therefore we don't return | |
3178 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3179 | */ | |
3180 | } | |
3181 | ||
1da177e4 LT |
3182 | /* |
3183 | * called with nfs4_lock_state() held. | |
3184 | */ | |
b37ad28b | 3185 | __be32 |
1da177e4 LT |
3186 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3187 | { | |
6668958f | 3188 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3189 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3190 | struct nfs4_file *fp = NULL; |
3191 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3192 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3193 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3194 | __be32 status; |
1da177e4 | 3195 | |
1da177e4 LT |
3196 | /* |
3197 | * Lookup file; if found, lookup stateid and check open request, | |
3198 | * and check for delegations in the process of being recalled. | |
3199 | * If not found, create the nfs4_file struct | |
3200 | */ | |
3201 | fp = find_file(ino); | |
3202 | if (fp) { | |
3203 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3204 | goto out; | |
41d22663 | 3205 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3206 | if (status) |
3207 | goto out; | |
1da177e4 | 3208 | } else { |
c44c5eeb | 3209 | status = nfserr_bad_stateid; |
8b289b2c | 3210 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3211 | goto out; |
3e772463 | 3212 | status = nfserr_jukebox; |
32513b40 BF |
3213 | fp = open->op_file; |
3214 | open->op_file = NULL; | |
3215 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3216 | } |
3217 | ||
3218 | /* | |
3219 | * OPEN the file, or upgrade an existing OPEN. | |
3220 | * If truncate fails, the OPEN fails. | |
3221 | */ | |
3222 | if (stp) { | |
3223 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3224 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3225 | if (status) |
3226 | goto out; | |
3227 | } else { | |
4cdc951b | 3228 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3229 | if (status) |
3230 | goto out; | |
3231 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3232 | if (status) |
1da177e4 | 3233 | goto out; |
4cdc951b BF |
3234 | stp = open->op_stp; |
3235 | open->op_stp = NULL; | |
996e0938 | 3236 | init_open_stateid(stp, fp, open); |
1da177e4 | 3237 | } |
dcef0413 BF |
3238 | update_stateid(&stp->st_stid.sc_stateid); |
3239 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3240 | |
d24433cd | 3241 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3242 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3243 | |
d24433cd BH |
3244 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3245 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3246 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3247 | goto nodeleg; | |
3248 | } | |
3249 | } | |
3250 | ||
1da177e4 LT |
3251 | /* |
3252 | * Attempt to hand out a delegation. No error return, because the | |
3253 | * OPEN succeeds even if we fail. | |
3254 | */ | |
5ccb0066 | 3255 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3256 | nodeleg: |
1da177e4 LT |
3257 | status = nfs_ok; |
3258 | ||
8c10cbdb | 3259 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3260 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3261 | out: |
d24433cd BH |
3262 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3263 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3264 | open->op_deleg_want) |
3265 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3266 | |
13cd2184 N |
3267 | if (fp) |
3268 | put_nfs4_file(fp); | |
37515177 | 3269 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3270 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3271 | /* |
3272 | * To finish the open response, we just need to set the rflags. | |
3273 | */ | |
3274 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3275 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3276 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3277 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3278 | ||
3279 | return status; | |
3280 | } | |
3281 | ||
d29b20cd BF |
3282 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3283 | { | |
3284 | if (open->op_openowner) { | |
3285 | struct nfs4_openowner *oo = open->op_openowner; | |
3286 | ||
3287 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3288 | list_del_init(&oo->oo_close_lru); | |
3289 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3290 | if (status) { | |
3291 | release_openowner(oo); | |
3292 | open->op_openowner = NULL; | |
3293 | } else | |
3294 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3295 | } | |
3296 | } | |
32513b40 BF |
3297 | if (open->op_file) |
3298 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3299 | if (open->op_stp) |
ef79859e | 3300 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3301 | } |
3302 | ||
9b2ef62b BF |
3303 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
3304 | { | |
3305 | struct nfs4_client *found; | |
3306 | ||
3307 | if (STALE_CLIENTID(clid, nn)) | |
3308 | return nfserr_stale_clientid; | |
3309 | found = find_confirmed_client(clid, session, nn); | |
3310 | if (clp) | |
3311 | *clp = found; | |
3312 | return found ? nfs_ok : nfserr_expired; | |
3313 | } | |
3314 | ||
b37ad28b | 3315 | __be32 |
b591480b BF |
3316 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3317 | clientid_t *clid) | |
1da177e4 LT |
3318 | { |
3319 | struct nfs4_client *clp; | |
b37ad28b | 3320 | __be32 status; |
7f2210fa | 3321 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3322 | |
3323 | nfs4_lock_state(); | |
3324 | dprintk("process_renew(%08x/%08x): starting\n", | |
3325 | clid->cl_boot, clid->cl_id); | |
9b2ef62b BF |
3326 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
3327 | if (status) | |
1da177e4 | 3328 | goto out; |
1da177e4 | 3329 | status = nfserr_cb_path_down; |
ea1da636 | 3330 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3331 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3332 | goto out; |
3333 | status = nfs_ok; | |
3334 | out: | |
3335 | nfs4_unlock_state(); | |
3336 | return status; | |
3337 | } | |
3338 | ||
a76b4319 | 3339 | static void |
12760c66 | 3340 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3341 | { |
33dcc481 | 3342 | /* do nothing if grace period already ended */ |
a51c84ed | 3343 | if (nn->grace_ended) |
33dcc481 JL |
3344 | return; |
3345 | ||
a76b4319 | 3346 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3347 | nn->grace_ended = true; |
12760c66 | 3348 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3349 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3350 | /* |
3351 | * Now that every NFSv4 client has had the chance to recover and | |
3352 | * to see the (possibly new, possibly shorter) lease time, we | |
3353 | * can safely set the next grace time to the current lease time: | |
3354 | */ | |
5284b44e | 3355 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3356 | } |
3357 | ||
fd39ca9a | 3358 | static time_t |
09121281 | 3359 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3360 | { |
3361 | struct nfs4_client *clp; | |
fe0750e5 | 3362 | struct nfs4_openowner *oo; |
1da177e4 LT |
3363 | struct nfs4_delegation *dp; |
3364 | struct list_head *pos, *next, reaplist; | |
3d733711 SK |
3365 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
3366 | time_t t, clientid_val = nn->nfsd4_lease; | |
3367 | time_t u, test_val = nn->nfsd4_lease; | |
1da177e4 LT |
3368 | |
3369 | nfs4_lock_state(); | |
3370 | ||
3371 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3372 | nfsd4_end_grace(nn); |
36acb66b | 3373 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3374 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3375 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3376 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3377 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3378 | t = clp->cl_time - cutoff; | |
3379 | if (clientid_val > t) | |
3380 | clientid_val = t; | |
3381 | break; | |
3382 | } | |
221a6876 | 3383 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3384 | dprintk("NFSD: client in use (clientid %08x)\n", |
3385 | clp->cl_clientid.cl_id); | |
3386 | continue; | |
3387 | } | |
221a6876 | 3388 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3389 | } |
c9a49628 | 3390 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3391 | list_for_each_safe(pos, next, &reaplist) { |
3392 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3393 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3394 | clp->cl_clientid.cl_id); | |
3395 | expire_client(clp); | |
3396 | } | |
1da177e4 | 3397 | spin_lock(&recall_lock); |
e8c69d17 | 3398 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3399 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3400 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3401 | continue; | |
1da177e4 LT |
3402 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
3403 | u = dp->dl_time - cutoff; | |
3404 | if (test_val > u) | |
3405 | test_val = u; | |
3406 | break; | |
3407 | } | |
1da177e4 LT |
3408 | list_move(&dp->dl_recall_lru, &reaplist); |
3409 | } | |
3410 | spin_unlock(&recall_lock); | |
3411 | list_for_each_safe(pos, next, &reaplist) { | |
3412 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 3413 | revoke_delegation(dp); |
1da177e4 | 3414 | } |
3d733711 | 3415 | test_val = nn->nfsd4_lease; |
73758fed | 3416 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3417 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3418 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3419 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3420 | if (test_val > u) |
3421 | test_val = u; | |
3422 | break; | |
3423 | } | |
fe0750e5 | 3424 | release_openowner(oo); |
1da177e4 LT |
3425 | } |
3426 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3427 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3428 | nfs4_unlock_state(); | |
3429 | return clientid_val; | |
3430 | } | |
3431 | ||
a254b246 HH |
3432 | static struct workqueue_struct *laundry_wq; |
3433 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3434 | |
3435 | static void | |
09121281 | 3436 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3437 | { |
3438 | time_t t; | |
09121281 SK |
3439 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3440 | work); | |
3441 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3442 | laundromat_work); | |
1da177e4 | 3443 | |
09121281 | 3444 | t = nfs4_laundromat(nn); |
1da177e4 | 3445 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3446 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3447 | } |
3448 | ||
f7a4d872 | 3449 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3450 | { |
f7a4d872 BF |
3451 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3452 | return nfserr_bad_stateid; | |
3453 | return nfs_ok; | |
1da177e4 LT |
3454 | } |
3455 | ||
1da177e4 | 3456 | static inline int |
82c5ff1b | 3457 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3458 | { |
82c5ff1b JL |
3459 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3460 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3461 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3462 | } |
3463 | ||
3464 | static inline int | |
82c5ff1b | 3465 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3466 | { |
82c5ff1b JL |
3467 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3468 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3469 | } |
3470 | ||
3471 | static | |
dcef0413 | 3472 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3473 | { |
b37ad28b | 3474 | __be32 status = nfserr_openmode; |
1da177e4 | 3475 | |
02921914 BF |
3476 | /* For lock stateid's, we test the parent open, not the lock: */ |
3477 | if (stp->st_openstp) | |
3478 | stp = stp->st_openstp; | |
82c5ff1b | 3479 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3480 | goto out; |
82c5ff1b | 3481 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3482 | goto out; |
3483 | status = nfs_ok; | |
3484 | out: | |
3485 | return status; | |
3486 | } | |
3487 | ||
b37ad28b | 3488 | static inline __be32 |
5ccb0066 | 3489 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3490 | { |
203a8c8e | 3491 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3492 | return nfs_ok; |
5ccb0066 | 3493 | else if (locks_in_grace(net)) { |
25985edc | 3494 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3495 | * conflicting state; so we must wait out the grace period. */ |
3496 | return nfserr_grace; | |
3497 | } else if (flags & WR_STATE) | |
3498 | return nfs4_share_conflict(current_fh, | |
3499 | NFS4_SHARE_DENY_WRITE); | |
3500 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3501 | return nfs4_share_conflict(current_fh, | |
3502 | NFS4_SHARE_DENY_READ); | |
3503 | } | |
3504 | ||
3505 | /* | |
3506 | * Allow READ/WRITE during grace period on recovered state only for files | |
3507 | * that are not able to provide mandatory locking. | |
3508 | */ | |
3509 | static inline int | |
5ccb0066 | 3510 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3511 | { |
5ccb0066 | 3512 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3513 | } |
3514 | ||
81b82965 BF |
3515 | /* Returns true iff a is later than b: */ |
3516 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3517 | { | |
1a9357f4 | 3518 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
3519 | } |
3520 | ||
57b7b43b | 3521 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3522 | { |
6668958f AA |
3523 | /* |
3524 | * When sessions are used the stateid generation number is ignored | |
3525 | * when it is zero. | |
3526 | */ | |
28dde241 | 3527 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3528 | return nfs_ok; |
3529 | ||
3530 | if (in->si_generation == ref->si_generation) | |
3531 | return nfs_ok; | |
6668958f | 3532 | |
0836f587 | 3533 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3534 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3535 | return nfserr_bad_stateid; |
3536 | /* | |
81b82965 BF |
3537 | * However, we could see a stateid from the past, even from a |
3538 | * non-buggy client. For example, if the client sends a lock | |
3539 | * while some IO is outstanding, the lock may bump si_generation | |
3540 | * while the IO is still in flight. The client could avoid that | |
3541 | * situation by waiting for responses on all the IO requests, | |
3542 | * but better performance may result in retrying IO that | |
3543 | * receives an old_stateid error if requests are rarely | |
3544 | * reordered in flight: | |
0836f587 | 3545 | */ |
81b82965 | 3546 | return nfserr_old_stateid; |
0836f587 BF |
3547 | } |
3548 | ||
7df302f7 | 3549 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3550 | { |
97b7e3b6 BF |
3551 | struct nfs4_stid *s; |
3552 | struct nfs4_ol_stateid *ols; | |
3553 | __be32 status; | |
17456804 | 3554 | |
7df302f7 CL |
3555 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3556 | return nfserr_bad_stateid; | |
3557 | /* Client debugging aid. */ | |
3558 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3559 | char addr_str[INET6_ADDRSTRLEN]; | |
3560 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3561 | sizeof(addr_str)); | |
3562 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3563 | "with incorrect client ID\n", addr_str); | |
3564 | return nfserr_bad_stateid; | |
3565 | } | |
38c2f4b1 | 3566 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3567 | if (!s) |
7df302f7 | 3568 | return nfserr_bad_stateid; |
36279ac1 | 3569 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3570 | if (status) |
97b7e3b6 | 3571 | return status; |
23340032 BF |
3572 | switch (s->sc_type) { |
3573 | case NFS4_DELEG_STID: | |
97b7e3b6 | 3574 | return nfs_ok; |
3bd64a5b BF |
3575 | case NFS4_REVOKED_DELEG_STID: |
3576 | return nfserr_deleg_revoked; | |
23340032 BF |
3577 | case NFS4_OPEN_STID: |
3578 | case NFS4_LOCK_STID: | |
3579 | ols = openlockstateid(s); | |
3580 | if (ols->st_stateowner->so_is_open_owner | |
3581 | && !(openowner(ols->st_stateowner)->oo_flags | |
3582 | & NFS4_OO_CONFIRMED)) | |
3583 | return nfserr_bad_stateid; | |
97b7e3b6 | 3584 | return nfs_ok; |
23340032 BF |
3585 | default: |
3586 | printk("unknown stateid type %x\n", s->sc_type); | |
3587 | case NFS4_CLOSED_STID: | |
97b7e3b6 | 3588 | return nfserr_bad_stateid; |
23340032 | 3589 | } |
17456804 BS |
3590 | } |
3591 | ||
3320fef1 SK |
3592 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
3593 | struct nfs4_stid **s, bool sessions, | |
3594 | struct nfsd_net *nn) | |
38c2f4b1 BF |
3595 | { |
3596 | struct nfs4_client *cl; | |
0eb6f20a | 3597 | __be32 status; |
38c2f4b1 BF |
3598 | |
3599 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3600 | return nfserr_bad_stateid; | |
0eb6f20a BF |
3601 | status = lookup_clientid(&stateid->si_opaque.so_clid, sessions, |
3602 | nn, &cl); | |
3603 | if (status == nfserr_stale_clientid) | |
38c2f4b1 | 3604 | return nfserr_stale_stateid; |
0eb6f20a BF |
3605 | if (status) |
3606 | return status; | |
38c2f4b1 BF |
3607 | *s = find_stateid_by_type(cl, stateid, typemask); |
3608 | if (!*s) | |
3609 | return nfserr_bad_stateid; | |
3610 | return nfs_ok; | |
38c2f4b1 BF |
3611 | } |
3612 | ||
1da177e4 LT |
3613 | /* |
3614 | * Checks for stateid operations | |
3615 | */ | |
b37ad28b | 3616 | __be32 |
5ccb0066 | 3617 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3618 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3619 | { |
69064a27 | 3620 | struct nfs4_stid *s; |
dcef0413 | 3621 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3622 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3623 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3624 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3625 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b37ad28b | 3626 | __be32 status; |
1da177e4 | 3627 | |
1da177e4 LT |
3628 | if (filpp) |
3629 | *filpp = NULL; | |
3630 | ||
5ccb0066 | 3631 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3632 | return nfserr_grace; |
3633 | ||
3634 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3635 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3636 | |
3320fef1 SK |
3637 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
3638 | &s, cstate->minorversion, nn); | |
38c2f4b1 BF |
3639 | if (status) |
3640 | return status; | |
69064a27 BF |
3641 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3642 | if (status) | |
3643 | goto out; | |
f7a4d872 BF |
3644 | switch (s->sc_type) { |
3645 | case NFS4_DELEG_STID: | |
69064a27 | 3646 | dp = delegstateid(s); |
dc9bf700 BF |
3647 | status = nfs4_check_delegmode(dp, flags); |
3648 | if (status) | |
3649 | goto out; | |
43b0178e | 3650 | if (filpp) { |
acfdf5c3 | 3651 | *filpp = dp->dl_file->fi_deleg_file; |
063b0fb9 BF |
3652 | if (!*filpp) { |
3653 | WARN_ON_ONCE(1); | |
3654 | status = nfserr_serverfault; | |
3655 | goto out; | |
3656 | } | |
43b0178e | 3657 | } |
f7a4d872 BF |
3658 | break; |
3659 | case NFS4_OPEN_STID: | |
3660 | case NFS4_LOCK_STID: | |
69064a27 | 3661 | stp = openlockstateid(s); |
f7a4d872 BF |
3662 | status = nfs4_check_fh(current_fh, stp); |
3663 | if (status) | |
1da177e4 | 3664 | goto out; |
fe0750e5 | 3665 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3666 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3667 | goto out; |
a4455be0 BF |
3668 | status = nfs4_check_openmode(stp, flags); |
3669 | if (status) | |
1da177e4 | 3670 | goto out; |
f9d7562f BF |
3671 | if (filpp) { |
3672 | if (flags & RD_STATE) | |
3673 | *filpp = find_readable_file(stp->st_file); | |
3674 | else | |
3675 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3676 | } |
f7a4d872 BF |
3677 | break; |
3678 | default: | |
3679 | return nfserr_bad_stateid; | |
1da177e4 LT |
3680 | } |
3681 | status = nfs_ok; | |
3682 | out: | |
3683 | return status; | |
3684 | } | |
3685 | ||
e1ca12df | 3686 | static __be32 |
dcef0413 | 3687 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3688 | { |
fe0750e5 | 3689 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3690 | return nfserr_locks_held; |
3691 | release_lock_stateid(stp); | |
3692 | return nfs_ok; | |
3693 | } | |
3694 | ||
17456804 BS |
3695 | /* |
3696 | * Test if the stateid is valid | |
3697 | */ | |
3698 | __be32 | |
3699 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3700 | struct nfsd4_test_stateid *test_stateid) | |
3701 | { | |
03cfb420 BS |
3702 | struct nfsd4_test_stateid_id *stateid; |
3703 | struct nfs4_client *cl = cstate->session->se_client; | |
3704 | ||
3705 | nfs4_lock_state(); | |
3706 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3707 | stateid->ts_id_status = |
3708 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3709 | nfs4_unlock_state(); |
3710 | ||
17456804 BS |
3711 | return nfs_ok; |
3712 | } | |
3713 | ||
e1ca12df BS |
3714 | __be32 |
3715 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3716 | struct nfsd4_free_stateid *free_stateid) | |
3717 | { | |
3718 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3719 | struct nfs4_stid *s; |
3bd64a5b | 3720 | struct nfs4_delegation *dp; |
38c2f4b1 | 3721 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3722 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3723 | |
3724 | nfs4_lock_state(); | |
38c2f4b1 | 3725 | s = find_stateid(cl, stateid); |
2da1cec7 | 3726 | if (!s) |
81b82965 | 3727 | goto out; |
2da1cec7 BF |
3728 | switch (s->sc_type) { |
3729 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3730 | ret = nfserr_locks_held; |
3731 | goto out; | |
2da1cec7 BF |
3732 | case NFS4_OPEN_STID: |
3733 | case NFS4_LOCK_STID: | |
3734 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3735 | if (ret) | |
3736 | goto out; | |
3737 | if (s->sc_type == NFS4_LOCK_STID) | |
3738 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3739 | else | |
3740 | ret = nfserr_locks_held; | |
f7a4d872 | 3741 | break; |
3bd64a5b BF |
3742 | case NFS4_REVOKED_DELEG_STID: |
3743 | dp = delegstateid(s); | |
3744 | destroy_revoked_delegation(dp); | |
3745 | ret = nfs_ok; | |
3746 | break; | |
f7a4d872 BF |
3747 | default: |
3748 | ret = nfserr_bad_stateid; | |
e1ca12df | 3749 | } |
e1ca12df BS |
3750 | out: |
3751 | nfs4_unlock_state(); | |
3752 | return ret; | |
3753 | } | |
3754 | ||
4c4cd222 N |
3755 | static inline int |
3756 | setlkflg (int type) | |
3757 | { | |
3758 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3759 | RD_STATE : WR_STATE; | |
3760 | } | |
1da177e4 | 3761 | |
dcef0413 | 3762 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3763 | { |
3764 | struct svc_fh *current_fh = &cstate->current_fh; | |
3765 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3766 | __be32 status; | |
3767 | ||
c0a5d93e BF |
3768 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3769 | if (status) | |
3770 | return status; | |
3bd64a5b BF |
3771 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
3772 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
3773 | /* |
3774 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
3775 | * nfserr_replay_me from the previous step, and |
3776 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
3777 | */ |
3778 | return nfserr_bad_stateid; | |
3779 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3780 | if (status) | |
3781 | return status; | |
3782 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3783 | } |
3784 | ||
1da177e4 LT |
3785 | /* |
3786 | * Checks for sequence id mutating operations. | |
3787 | */ | |
b37ad28b | 3788 | static __be32 |
dd453dfd | 3789 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3790 | stateid_t *stateid, char typemask, |
3320fef1 SK |
3791 | struct nfs4_ol_stateid **stpp, |
3792 | struct nfsd_net *nn) | |
1da177e4 | 3793 | { |
0836f587 | 3794 | __be32 status; |
38c2f4b1 | 3795 | struct nfs4_stid *s; |
1da177e4 | 3796 | |
8c10cbdb BH |
3797 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3798 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3799 | |
1da177e4 | 3800 | *stpp = NULL; |
3320fef1 SK |
3801 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
3802 | cstate->minorversion, nn); | |
c0a5d93e BF |
3803 | if (status) |
3804 | return status; | |
38c2f4b1 | 3805 | *stpp = openlockstateid(s); |
3d74e6a5 BF |
3806 | if (!nfsd4_has_session(cstate)) |
3807 | cstate->replay_owner = (*stpp)->st_stateowner; | |
1da177e4 | 3808 | |
c0a5d93e BF |
3809 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3810 | } | |
39325bd0 | 3811 | |
3320fef1 SK |
3812 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3813 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
3814 | { |
3815 | __be32 status; | |
3816 | struct nfs4_openowner *oo; | |
1da177e4 | 3817 | |
c0a5d93e | 3818 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 3819 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
3820 | if (status) |
3821 | return status; | |
c0a5d93e | 3822 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3823 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3824 | return nfserr_bad_stateid; |
3a4f98bb | 3825 | return nfs_ok; |
1da177e4 LT |
3826 | } |
3827 | ||
b37ad28b | 3828 | __be32 |
ca364317 | 3829 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3830 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3831 | { |
b37ad28b | 3832 | __be32 status; |
fe0750e5 | 3833 | struct nfs4_openowner *oo; |
dcef0413 | 3834 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3835 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3836 | |
3837 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3838 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3839 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3840 | |
ca364317 | 3841 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3842 | if (status) |
3843 | return status; | |
1da177e4 LT |
3844 | |
3845 | nfs4_lock_state(); | |
3846 | ||
9072d5c6 | 3847 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3848 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 3849 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 3850 | if (status) |
68b66e82 | 3851 | goto out; |
fe0750e5 | 3852 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3853 | status = nfserr_bad_stateid; |
dad1c067 | 3854 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3855 | goto out; |
dad1c067 | 3856 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3857 | update_stateid(&stp->st_stid.sc_stateid); |
3858 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3859 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3860 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3861 | |
2a4317c5 | 3862 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3863 | status = nfs_ok; |
1da177e4 | 3864 | out: |
9411b1d4 | 3865 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3866 | if (!cstate->replay_owner) |
3867 | nfs4_unlock_state(); | |
1da177e4 LT |
3868 | return status; |
3869 | } | |
3870 | ||
6409a5a6 | 3871 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3872 | { |
82c5ff1b | 3873 | if (!test_access(access, stp)) |
6409a5a6 BF |
3874 | return; |
3875 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3876 | clear_access(access, stp); |
6409a5a6 | 3877 | } |
f197c271 | 3878 | |
6409a5a6 BF |
3879 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3880 | { | |
3881 | switch (to_access) { | |
3882 | case NFS4_SHARE_ACCESS_READ: | |
3883 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3884 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3885 | break; | |
3886 | case NFS4_SHARE_ACCESS_WRITE: | |
3887 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3888 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3889 | break; | |
3890 | case NFS4_SHARE_ACCESS_BOTH: | |
3891 | break; | |
3892 | default: | |
063b0fb9 | 3893 | WARN_ON_ONCE(1); |
1da177e4 LT |
3894 | } |
3895 | } | |
3896 | ||
3897 | static void | |
ce0fc43c | 3898 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3899 | { |
3900 | int i; | |
3901 | for (i = 0; i < 4; i++) { | |
3902 | if ((i & deny) != i) | |
ce0fc43c | 3903 | clear_deny(i, stp); |
1da177e4 LT |
3904 | } |
3905 | } | |
3906 | ||
b37ad28b | 3907 | __be32 |
ca364317 BF |
3908 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3909 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3910 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3911 | { |
b37ad28b | 3912 | __be32 status; |
dcef0413 | 3913 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3914 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3915 | |
3916 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3917 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3918 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3919 | |
c30e92df | 3920 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3921 | if (od->od_deleg_want) |
3922 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3923 | od->od_deleg_want); | |
1da177e4 LT |
3924 | |
3925 | nfs4_lock_state(); | |
c0a5d93e | 3926 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 3927 | &od->od_stateid, &stp, nn); |
9072d5c6 | 3928 | if (status) |
1da177e4 | 3929 | goto out; |
1da177e4 | 3930 | status = nfserr_inval; |
82c5ff1b JL |
3931 | if (!test_access(od->od_share_access, stp)) { |
3932 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3933 | stp->st_access_bmap, od->od_share_access); |
3934 | goto out; | |
3935 | } | |
ce0fc43c | 3936 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3937 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3938 | stp->st_deny_bmap, od->od_share_deny); | |
3939 | goto out; | |
3940 | } | |
6409a5a6 | 3941 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3942 | |
ce0fc43c | 3943 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3944 | |
dcef0413 BF |
3945 | update_stateid(&stp->st_stid.sc_stateid); |
3946 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3947 | status = nfs_ok; |
3948 | out: | |
9411b1d4 | 3949 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3950 | if (!cstate->replay_owner) |
3951 | nfs4_unlock_state(); | |
1da177e4 LT |
3952 | return status; |
3953 | } | |
3954 | ||
f7a4d872 BF |
3955 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
3956 | { | |
3957 | unhash_open_stateid(s); | |
3958 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3959 | } |
3960 | ||
1da177e4 LT |
3961 | /* |
3962 | * nfs4_unlock_state() called after encode | |
3963 | */ | |
b37ad28b | 3964 | __be32 |
ca364317 | 3965 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3966 | struct nfsd4_close *close) |
1da177e4 | 3967 | { |
b37ad28b | 3968 | __be32 status; |
fe0750e5 | 3969 | struct nfs4_openowner *oo; |
dcef0413 | 3970 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
3971 | struct net *net = SVC_NET(rqstp); |
3972 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
3973 | |
3974 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3975 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3976 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3977 | |
3978 | nfs4_lock_state(); | |
f7a4d872 BF |
3979 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3980 | &close->cl_stateid, | |
3981 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 3982 | &stp, nn); |
9411b1d4 | 3983 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 3984 | if (status) |
1da177e4 | 3985 | goto out; |
fe0750e5 | 3986 | oo = openowner(stp->st_stateowner); |
dcef0413 BF |
3987 | update_stateid(&stp->st_stid.sc_stateid); |
3988 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3989 | |
f7a4d872 | 3990 | nfsd4_close_open_stateid(stp); |
9411b1d4 BF |
3991 | |
3992 | if (cstate->minorversion) { | |
3993 | unhash_stid(&stp->st_stid); | |
3994 | free_generic_stateid(stp); | |
3995 | } else | |
3996 | oo->oo_last_closed_stid = stp; | |
04ef5954 | 3997 | |
74dbafaf | 3998 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3d74e6a5 | 3999 | if (cstate->minorversion) |
74dbafaf | 4000 | release_openowner(oo); |
3d74e6a5 | 4001 | else { |
74dbafaf BF |
4002 | /* |
4003 | * In the 4.0 case we need to keep the owners around a | |
4004 | * little while to handle CLOSE replay. | |
4005 | */ | |
53584f66 | 4006 | move_to_close_lru(oo, SVC_NET(rqstp)); |
74dbafaf BF |
4007 | } |
4008 | } | |
1da177e4 | 4009 | out: |
5ec094c1 BF |
4010 | if (!cstate->replay_owner) |
4011 | nfs4_unlock_state(); | |
1da177e4 LT |
4012 | return status; |
4013 | } | |
4014 | ||
b37ad28b | 4015 | __be32 |
ca364317 BF |
4016 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4017 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4018 | { |
203a8c8e BF |
4019 | struct nfs4_delegation *dp; |
4020 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4021 | struct nfs4_stid *s; |
b37ad28b | 4022 | __be32 status; |
3320fef1 | 4023 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4024 | |
ca364317 | 4025 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4026 | return status; |
1da177e4 LT |
4027 | |
4028 | nfs4_lock_state(); | |
3320fef1 SK |
4029 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
4030 | cstate->minorversion, nn); | |
38c2f4b1 | 4031 | if (status) |
203a8c8e | 4032 | goto out; |
38c2f4b1 | 4033 | dp = delegstateid(s); |
d5477a8d | 4034 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
4035 | if (status) |
4036 | goto out; | |
203a8c8e | 4037 | |
3bd64a5b | 4038 | destroy_delegation(dp); |
1da177e4 | 4039 | out: |
203a8c8e BF |
4040 | nfs4_unlock_state(); |
4041 | ||
1da177e4 LT |
4042 | return status; |
4043 | } | |
4044 | ||
4045 | ||
1da177e4 | 4046 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4047 | |
009673b4 | 4048 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
1da177e4 | 4049 | |
87df4de8 BH |
4050 | static inline u64 |
4051 | end_offset(u64 start, u64 len) | |
4052 | { | |
4053 | u64 end; | |
4054 | ||
4055 | end = start + len; | |
4056 | return end >= start ? end: NFS4_MAX_UINT64; | |
4057 | } | |
4058 | ||
4059 | /* last octet in a range */ | |
4060 | static inline u64 | |
4061 | last_byte_offset(u64 start, u64 len) | |
4062 | { | |
4063 | u64 end; | |
4064 | ||
063b0fb9 | 4065 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4066 | end = start + len; |
4067 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4068 | } | |
4069 | ||
009673b4 | 4070 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
4071 | { |
4072 | return (file_hashval(inode) + cl_id | |
4073 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 4074 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
4075 | } |
4076 | ||
1da177e4 LT |
4077 | /* |
4078 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4079 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4080 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4081 | * locking, this prevents us from being completely protocol-compliant. The | |
4082 | * real solution to this problem is to start using unsigned file offsets in | |
4083 | * the VFS, but this is a very deep change! | |
4084 | */ | |
4085 | static inline void | |
4086 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4087 | { | |
4088 | if (lock->fl_start < 0) | |
4089 | lock->fl_start = OFFSET_MAX; | |
4090 | if (lock->fl_end < 0) | |
4091 | lock->fl_end = OFFSET_MAX; | |
4092 | } | |
4093 | ||
d5b9026a N |
4094 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4095 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4096 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4097 | }; |
1da177e4 LT |
4098 | |
4099 | static inline void | |
4100 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4101 | { | |
fe0750e5 | 4102 | struct nfs4_lockowner *lo; |
1da177e4 | 4103 | |
d5b9026a | 4104 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4105 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4106 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4107 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4108 | if (!deny->ld_owner.data) |
4109 | /* We just don't care that much */ | |
4110 | goto nevermind; | |
fe0750e5 BF |
4111 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4112 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4113 | } else { |
7c13f344 BF |
4114 | nevermind: |
4115 | deny->ld_owner.len = 0; | |
4116 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4117 | deny->ld_clientid.cl_boot = 0; |
4118 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4119 | } |
4120 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4121 | deny->ld_length = NFS4_MAX_UINT64; |
4122 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4123 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4124 | deny->ld_type = NFS4_READ_LT; | |
4125 | if (fl->fl_type != F_RDLCK) | |
4126 | deny->ld_type = NFS4_WRITE_LT; | |
4127 | } | |
4128 | ||
b93d87c1 BF |
4129 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
4130 | { | |
4131 | struct nfs4_ol_stateid *lst; | |
4132 | ||
4133 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
4134 | return false; | |
4135 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4136 | struct nfs4_ol_stateid, st_perstateowner); | |
4137 | return lst->st_file->fi_inode == inode; | |
4138 | } | |
4139 | ||
fe0750e5 BF |
4140 | static struct nfs4_lockowner * |
4141 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
20e9e2bc | 4142 | struct xdr_netobj *owner, struct nfsd_net *nn) |
1da177e4 | 4143 | { |
009673b4 | 4144 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 4145 | struct nfs4_lockowner *lo; |
1da177e4 | 4146 | |
20e9e2bc | 4147 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
4148 | if (same_lockowner_ino(lo, inode, clid, owner)) |
4149 | return lo; | |
1da177e4 LT |
4150 | } |
4151 | return NULL; | |
4152 | } | |
4153 | ||
dcef0413 | 4154 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 4155 | { |
009673b4 BF |
4156 | struct inode *inode = open_stp->st_file->fi_inode; |
4157 | unsigned int inohash = lockowner_ino_hashval(inode, | |
4158 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
9b531137 | 4159 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
009673b4 | 4160 | |
9b531137 | 4161 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
20e9e2bc | 4162 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 4163 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
4164 | } |
4165 | ||
1da177e4 LT |
4166 | /* |
4167 | * Alloc a lock owner structure. | |
4168 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4169 | * occurred. |
1da177e4 | 4170 | * |
16bfdaaf | 4171 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4172 | */ |
4173 | ||
fe0750e5 | 4174 | static struct nfs4_lockowner * |
dcef0413 | 4175 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4176 | struct nfs4_lockowner *lo; |
1da177e4 | 4177 | |
fe0750e5 BF |
4178 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4179 | if (!lo) | |
1da177e4 | 4180 | return NULL; |
fe0750e5 BF |
4181 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4182 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4183 | /* It is the openowner seqid that will be incremented in encode in the |
4184 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4185 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4186 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4187 | return lo; | |
1da177e4 LT |
4188 | } |
4189 | ||
dcef0413 BF |
4190 | static struct nfs4_ol_stateid * |
4191 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4192 | { |
dcef0413 | 4193 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4194 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4195 | |
996e0938 | 4196 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4197 | if (stp == NULL) |
6136d2b4 | 4198 | return NULL; |
3abdb607 | 4199 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4200 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4201 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4202 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4203 | get_nfs4_file(fp); |
1da177e4 | 4204 | stp->st_file = fp; |
0997b173 | 4205 | stp->st_access_bmap = 0; |
1da177e4 | 4206 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4207 | stp->st_openstp = open_stp; |
1da177e4 LT |
4208 | return stp; |
4209 | } | |
4210 | ||
fd39ca9a | 4211 | static int |
1da177e4 LT |
4212 | check_lock_length(u64 offset, u64 length) |
4213 | { | |
87df4de8 | 4214 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4215 | LOFF_OVERFLOW(offset, length))); |
4216 | } | |
4217 | ||
dcef0413 | 4218 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4219 | { |
4220 | struct nfs4_file *fp = lock_stp->st_file; | |
4221 | int oflag = nfs4_access_to_omode(access); | |
4222 | ||
82c5ff1b | 4223 | if (test_access(access, lock_stp)) |
0997b173 BF |
4224 | return; |
4225 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4226 | set_access(access, lock_stp); |
0997b173 BF |
4227 | } |
4228 | ||
2355c596 | 4229 | 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 |
4230 | { |
4231 | struct nfs4_file *fi = ost->st_file; | |
4232 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4233 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4234 | struct nfs4_lockowner *lo; | |
4235 | unsigned int strhashval; | |
20e9e2bc | 4236 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4237 | |
20e9e2bc SK |
4238 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
4239 | &lock->v.new.owner, nn); | |
64a284d0 BF |
4240 | if (lo) { |
4241 | if (!cstate->minorversion) | |
4242 | return nfserr_bad_seqid; | |
4243 | /* XXX: a lockowner always has exactly one stateid: */ | |
4244 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4245 | struct nfs4_ol_stateid, st_perstateowner); | |
4246 | return nfs_ok; | |
4247 | } | |
16bfdaaf | 4248 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4249 | &lock->v.new.owner); |
4250 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4251 | if (lo == NULL) | |
4252 | return nfserr_jukebox; | |
4253 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4254 | if (*lst == NULL) { | |
4255 | release_lockowner(lo); | |
4256 | return nfserr_jukebox; | |
4257 | } | |
4258 | *new = true; | |
4259 | return nfs_ok; | |
4260 | } | |
4261 | ||
1da177e4 LT |
4262 | /* |
4263 | * LOCK operation | |
4264 | */ | |
b37ad28b | 4265 | __be32 |
ca364317 | 4266 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4267 | struct nfsd4_lock *lock) |
1da177e4 | 4268 | { |
fe0750e5 BF |
4269 | struct nfs4_openowner *open_sop = NULL; |
4270 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4271 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4272 | struct file *filp = NULL; |
21179d81 JL |
4273 | struct file_lock *file_lock = NULL; |
4274 | struct file_lock *conflock = NULL; | |
b37ad28b | 4275 | __be32 status = 0; |
64a284d0 | 4276 | bool new_state = false; |
b34f27aa | 4277 | int lkflg; |
b8dd7b9a | 4278 | int err; |
3320fef1 SK |
4279 | struct net *net = SVC_NET(rqstp); |
4280 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4281 | |
4282 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4283 | (long long) lock->lk_offset, | |
4284 | (long long) lock->lk_length); | |
4285 | ||
1da177e4 LT |
4286 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4287 | return nfserr_inval; | |
4288 | ||
ca364317 | 4289 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4290 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4291 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4292 | return status; | |
4293 | } | |
4294 | ||
1da177e4 LT |
4295 | nfs4_lock_state(); |
4296 | ||
4297 | if (lock->lk_is_new) { | |
dcef0413 | 4298 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4299 | |
4300 | if (nfsd4_has_session(cstate)) | |
4301 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4302 | memcpy(&lock->v.new.clientid, | |
4303 | &cstate->session->se_client->cl_clientid, | |
4304 | sizeof(clientid_t)); | |
4305 | ||
1da177e4 | 4306 | status = nfserr_stale_clientid; |
2c142baa | 4307 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4308 | goto out; |
1da177e4 | 4309 | |
1da177e4 | 4310 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4311 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4312 | lock->lk_new_open_seqid, |
4313 | &lock->lk_new_open_stateid, | |
3320fef1 | 4314 | &open_stp, nn); |
37515177 | 4315 | if (status) |
1da177e4 | 4316 | goto out; |
fe0750e5 | 4317 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4318 | status = nfserr_bad_stateid; |
684e5638 | 4319 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4320 | &lock->v.new.clientid)) |
4321 | goto out; | |
64a284d0 BF |
4322 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4323 | &lock_stp, &new_state); | |
e1aaa891 | 4324 | } else |
dd453dfd | 4325 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4326 | lock->lk_old_lock_seqid, |
4327 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4328 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4329 | if (status) |
4330 | goto out; | |
64a284d0 | 4331 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4332 | |
b34f27aa BF |
4333 | lkflg = setlkflg(lock->lk_type); |
4334 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4335 | if (status) | |
4336 | goto out; | |
4337 | ||
0dd395dc | 4338 | status = nfserr_grace; |
3320fef1 | 4339 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4340 | goto out; |
4341 | status = nfserr_no_grace; | |
3320fef1 | 4342 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4343 | goto out; |
4344 | ||
21179d81 JL |
4345 | file_lock = locks_alloc_lock(); |
4346 | if (!file_lock) { | |
4347 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4348 | status = nfserr_jukebox; | |
4349 | goto out; | |
4350 | } | |
4351 | ||
4352 | locks_init_lock(file_lock); | |
1da177e4 LT |
4353 | switch (lock->lk_type) { |
4354 | case NFS4_READ_LT: | |
4355 | case NFS4_READW_LT: | |
0997b173 BF |
4356 | filp = find_readable_file(lock_stp->st_file); |
4357 | if (filp) | |
4358 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4359 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4360 | break; |
1da177e4 LT |
4361 | case NFS4_WRITE_LT: |
4362 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4363 | filp = find_writeable_file(lock_stp->st_file); |
4364 | if (filp) | |
4365 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4366 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4367 | break; |
1da177e4 LT |
4368 | default: |
4369 | status = nfserr_inval; | |
4370 | goto out; | |
4371 | } | |
f9d7562f BF |
4372 | if (!filp) { |
4373 | status = nfserr_openmode; | |
4374 | goto out; | |
4375 | } | |
21179d81 JL |
4376 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4377 | file_lock->fl_pid = current->tgid; | |
4378 | file_lock->fl_file = filp; | |
4379 | file_lock->fl_flags = FL_POSIX; | |
4380 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4381 | file_lock->fl_start = lock->lk_offset; | |
4382 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4383 | nfs4_transform_lock_offset(file_lock); | |
4384 | ||
4385 | conflock = locks_alloc_lock(); | |
4386 | if (!conflock) { | |
4387 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4388 | status = nfserr_jukebox; | |
4389 | goto out; | |
4390 | } | |
1da177e4 | 4391 | |
21179d81 | 4392 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4393 | switch (-err) { |
1da177e4 | 4394 | case 0: /* success! */ |
dcef0413 BF |
4395 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4396 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4397 | sizeof(stateid_t)); |
b8dd7b9a | 4398 | status = 0; |
eb76b3fd AA |
4399 | break; |
4400 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4401 | status = nfserr_denied; | |
4402 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4403 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4404 | break; |
1da177e4 LT |
4405 | case (EDEADLK): |
4406 | status = nfserr_deadlock; | |
eb76b3fd | 4407 | break; |
3e772463 | 4408 | default: |
fd85b817 | 4409 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4410 | status = nfserrno(err); |
eb76b3fd | 4411 | break; |
1da177e4 | 4412 | } |
1da177e4 | 4413 | out: |
64a284d0 | 4414 | if (status && new_state) |
f044ff83 | 4415 | release_lockowner(lock_sop); |
9411b1d4 | 4416 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4417 | if (!cstate->replay_owner) |
4418 | nfs4_unlock_state(); | |
21179d81 JL |
4419 | if (file_lock) |
4420 | locks_free_lock(file_lock); | |
4421 | if (conflock) | |
4422 | locks_free_lock(conflock); | |
1da177e4 LT |
4423 | return status; |
4424 | } | |
4425 | ||
55ef1274 BF |
4426 | /* |
4427 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4428 | * so we do a temporary open here just to get an open file to pass to | |
4429 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4430 | * inode operation.) | |
4431 | */ | |
04da6e9d | 4432 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4433 | { |
4434 | struct file *file; | |
04da6e9d AV |
4435 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4436 | if (!err) { | |
4437 | err = nfserrno(vfs_test_lock(file, lock)); | |
4438 | nfsd_close(file); | |
4439 | } | |
55ef1274 BF |
4440 | return err; |
4441 | } | |
4442 | ||
1da177e4 LT |
4443 | /* |
4444 | * LOCKT operation | |
4445 | */ | |
b37ad28b | 4446 | __be32 |
ca364317 BF |
4447 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4448 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4449 | { |
4450 | struct inode *inode; | |
21179d81 | 4451 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4452 | struct nfs4_lockowner *lo; |
b37ad28b | 4453 | __be32 status; |
7f2210fa | 4454 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4455 | |
5ccb0066 | 4456 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4457 | return nfserr_grace; |
4458 | ||
4459 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4460 | return nfserr_inval; | |
4461 | ||
1da177e4 LT |
4462 | nfs4_lock_state(); |
4463 | ||
9b2ef62b BF |
4464 | if (!nfsd4_has_session(cstate)) { |
4465 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); | |
4466 | if (status) | |
4467 | goto out; | |
4468 | } | |
1da177e4 | 4469 | |
75c096f7 | 4470 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4471 | goto out; |
1da177e4 | 4472 | |
ca364317 | 4473 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4474 | file_lock = locks_alloc_lock(); |
4475 | if (!file_lock) { | |
4476 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4477 | status = nfserr_jukebox; | |
4478 | goto out; | |
4479 | } | |
4480 | locks_init_lock(file_lock); | |
1da177e4 LT |
4481 | switch (lockt->lt_type) { |
4482 | case NFS4_READ_LT: | |
4483 | case NFS4_READW_LT: | |
21179d81 | 4484 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4485 | break; |
4486 | case NFS4_WRITE_LT: | |
4487 | case NFS4_WRITEW_LT: | |
21179d81 | 4488 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4489 | break; |
4490 | default: | |
2fdada03 | 4491 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4492 | status = nfserr_inval; |
4493 | goto out; | |
4494 | } | |
4495 | ||
20e9e2bc | 4496 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4497 | if (lo) |
21179d81 JL |
4498 | file_lock->fl_owner = (fl_owner_t)lo; |
4499 | file_lock->fl_pid = current->tgid; | |
4500 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4501 | |
21179d81 JL |
4502 | file_lock->fl_start = lockt->lt_offset; |
4503 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4504 | |
21179d81 | 4505 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4506 | |
21179d81 | 4507 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4508 | if (status) |
fd85b817 | 4509 | goto out; |
04da6e9d | 4510 | |
21179d81 | 4511 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4512 | status = nfserr_denied; |
21179d81 | 4513 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4514 | } |
4515 | out: | |
4516 | nfs4_unlock_state(); | |
21179d81 JL |
4517 | if (file_lock) |
4518 | locks_free_lock(file_lock); | |
1da177e4 LT |
4519 | return status; |
4520 | } | |
4521 | ||
b37ad28b | 4522 | __be32 |
ca364317 | 4523 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4524 | struct nfsd4_locku *locku) |
1da177e4 | 4525 | { |
dcef0413 | 4526 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4527 | struct file *filp = NULL; |
21179d81 | 4528 | struct file_lock *file_lock = NULL; |
b37ad28b | 4529 | __be32 status; |
b8dd7b9a | 4530 | int err; |
3320fef1 SK |
4531 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4532 | ||
1da177e4 LT |
4533 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4534 | (long long) locku->lu_offset, | |
4535 | (long long) locku->lu_length); | |
4536 | ||
4537 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4538 | return nfserr_inval; | |
4539 | ||
4540 | nfs4_lock_state(); | |
4541 | ||
9072d5c6 | 4542 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4543 | &locku->lu_stateid, NFS4_LOCK_STID, |
4544 | &stp, nn); | |
9072d5c6 | 4545 | if (status) |
1da177e4 | 4546 | goto out; |
f9d7562f BF |
4547 | filp = find_any_file(stp->st_file); |
4548 | if (!filp) { | |
4549 | status = nfserr_lock_range; | |
4550 | goto out; | |
4551 | } | |
21179d81 JL |
4552 | file_lock = locks_alloc_lock(); |
4553 | if (!file_lock) { | |
4554 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4555 | status = nfserr_jukebox; | |
4556 | goto out; | |
4557 | } | |
4558 | locks_init_lock(file_lock); | |
4559 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 4560 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
4561 | file_lock->fl_pid = current->tgid; |
4562 | file_lock->fl_file = filp; | |
4563 | file_lock->fl_flags = FL_POSIX; | |
4564 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4565 | file_lock->fl_start = locku->lu_offset; | |
4566 | ||
4567 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4568 | locku->lu_length); | |
4569 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 4570 | |
21179d81 | 4571 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4572 | if (err) { |
fd85b817 | 4573 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4574 | goto out_nfserr; |
4575 | } | |
dcef0413 BF |
4576 | update_stateid(&stp->st_stid.sc_stateid); |
4577 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4578 | |
4579 | out: | |
9411b1d4 | 4580 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
4581 | if (!cstate->replay_owner) |
4582 | nfs4_unlock_state(); | |
21179d81 JL |
4583 | if (file_lock) |
4584 | locks_free_lock(file_lock); | |
1da177e4 LT |
4585 | return status; |
4586 | ||
4587 | out_nfserr: | |
b8dd7b9a | 4588 | status = nfserrno(err); |
1da177e4 LT |
4589 | goto out; |
4590 | } | |
4591 | ||
4592 | /* | |
4593 | * returns | |
4594 | * 1: locks held by lockowner | |
4595 | * 0: no locks held by lockowner | |
4596 | */ | |
4597 | static int | |
fe0750e5 | 4598 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4599 | { |
4600 | struct file_lock **flpp; | |
f9d7562f | 4601 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4602 | int status = 0; |
4603 | ||
1c8c601a | 4604 | spin_lock(&inode->i_lock); |
1da177e4 | 4605 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4606 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4607 | status = 1; |
4608 | goto out; | |
796dadfd | 4609 | } |
1da177e4 LT |
4610 | } |
4611 | out: | |
1c8c601a | 4612 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
4613 | return status; |
4614 | } | |
4615 | ||
b37ad28b | 4616 | __be32 |
b591480b BF |
4617 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4618 | struct nfsd4_compound_state *cstate, | |
4619 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4620 | { |
4621 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4622 | struct nfs4_stateowner *sop; |
fe0750e5 | 4623 | struct nfs4_lockowner *lo; |
dcef0413 | 4624 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4625 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4626 | struct list_head matches; |
16bfdaaf | 4627 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4628 | __be32 status; |
7f2210fa | 4629 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4630 | |
4631 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4632 | clid->cl_boot, clid->cl_id); | |
4633 | ||
1da177e4 LT |
4634 | nfs4_lock_state(); |
4635 | ||
9b2ef62b BF |
4636 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
4637 | if (status) | |
4638 | goto out; | |
4639 | ||
3e9e3dbe | 4640 | status = nfserr_locks_held; |
3e9e3dbe | 4641 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4642 | |
9b531137 | 4643 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
4644 | if (sop->so_is_open_owner) |
4645 | continue; | |
06f1f864 BF |
4646 | if (!same_owner_str(sop, owner, clid)) |
4647 | continue; | |
4648 | list_for_each_entry(stp, &sop->so_stateids, | |
4649 | st_perstateowner) { | |
4650 | lo = lockowner(sop); | |
4651 | if (check_for_locks(stp->st_file, lo)) | |
4652 | goto out; | |
4653 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4654 | } |
3e9e3dbe N |
4655 | } |
4656 | /* Clients probably won't expect us to return with some (but not all) | |
4657 | * of the lockowner state released; so don't release any until all | |
4658 | * have been checked. */ | |
4659 | status = nfs_ok; | |
0fa822e4 | 4660 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4661 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4662 | lo_list); | |
0fa822e4 N |
4663 | /* unhash_stateowner deletes so_perclient only |
4664 | * for openowners. */ | |
fe0750e5 BF |
4665 | list_del(&lo->lo_list); |
4666 | release_lockowner(lo); | |
1da177e4 LT |
4667 | } |
4668 | out: | |
4669 | nfs4_unlock_state(); | |
4670 | return status; | |
4671 | } | |
4672 | ||
4673 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4674 | alloc_reclaim(void) |
1da177e4 | 4675 | { |
a55370a3 | 4676 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4677 | } |
4678 | ||
0ce0c2b5 | 4679 | bool |
52e19c09 | 4680 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4681 | { |
0ce0c2b5 | 4682 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4683 | |
52e19c09 | 4684 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4685 | return (crp && crp->cr_clp); |
c7b9a459 N |
4686 | } |
4687 | ||
1da177e4 LT |
4688 | /* |
4689 | * failure => all reset bets are off, nfserr_no_grace... | |
4690 | */ | |
772a9bbb | 4691 | struct nfs4_client_reclaim * |
52e19c09 | 4692 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4693 | { |
4694 | unsigned int strhashval; | |
772a9bbb | 4695 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4696 | |
a55370a3 N |
4697 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4698 | crp = alloc_reclaim(); | |
772a9bbb JL |
4699 | if (crp) { |
4700 | strhashval = clientstr_hashval(name); | |
4701 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4702 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4703 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4704 | crp->cr_clp = NULL; |
52e19c09 | 4705 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4706 | } |
4707 | return crp; | |
1da177e4 LT |
4708 | } |
4709 | ||
ce30e539 | 4710 | void |
52e19c09 | 4711 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4712 | { |
4713 | list_del(&crp->cr_strhash); | |
4714 | kfree(crp); | |
52e19c09 | 4715 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4716 | } |
4717 | ||
2a4317c5 | 4718 | void |
52e19c09 | 4719 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4720 | { |
4721 | struct nfs4_client_reclaim *crp = NULL; | |
4722 | int i; | |
4723 | ||
1da177e4 | 4724 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4725 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4726 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4727 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4728 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4729 | } |
4730 | } | |
063b0fb9 | 4731 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4732 | } |
4733 | ||
4734 | /* | |
4735 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4736 | struct nfs4_client_reclaim * |
52e19c09 | 4737 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4738 | { |
4739 | unsigned int strhashval; | |
1da177e4 LT |
4740 | struct nfs4_client_reclaim *crp = NULL; |
4741 | ||
278c931c | 4742 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4743 | |
278c931c | 4744 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4745 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4746 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4747 | return crp; |
4748 | } | |
4749 | } | |
4750 | return NULL; | |
4751 | } | |
4752 | ||
4753 | /* | |
4754 | * Called from OPEN. Look for clientid in reclaim list. | |
4755 | */ | |
b37ad28b | 4756 | __be32 |
3320fef1 | 4757 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4758 | { |
a52d726b JL |
4759 | struct nfs4_client *clp; |
4760 | ||
4761 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4762 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4763 | if (clp == NULL) |
4764 | return nfserr_reclaim_bad; | |
4765 | ||
4766 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4767 | } |
4768 | ||
65178db4 BS |
4769 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4770 | ||
44e34da6 BS |
4771 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4772 | { | |
221a6876 BF |
4773 | if (mark_client_expired(clp)) |
4774 | return 0; | |
44e34da6 BS |
4775 | expire_client(clp); |
4776 | return 1; | |
4777 | } | |
4778 | ||
184c1847 BS |
4779 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4780 | { | |
4781 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4782 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4783 | printk(KERN_INFO "NFS Client: %s\n", buf); |
4784 | return 1; | |
4785 | } | |
4786 | ||
4787 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
4788 | const char *type) | |
4789 | { | |
4790 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4791 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4792 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
4793 | } | |
4794 | ||
fc29171f BS |
4795 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) |
4796 | { | |
4797 | struct nfs4_openowner *oop; | |
4798 | struct nfs4_lockowner *lop, *lo_next; | |
4799 | struct nfs4_ol_stateid *stp, *st_next; | |
4800 | u64 count = 0; | |
4801 | ||
4802 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
4803 | list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { | |
4804 | list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { | |
4805 | if (func) | |
4806 | func(lop); | |
4807 | if (++count == max) | |
4808 | return count; | |
4809 | } | |
4810 | } | |
4811 | } | |
4812 | ||
4813 | return count; | |
4814 | } | |
4815 | ||
4816 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
4817 | { | |
4818 | return nfsd_foreach_client_lock(clp, max, release_lockowner); | |
4819 | } | |
4820 | ||
184c1847 BS |
4821 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
4822 | { | |
4823 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
4824 | nfsd_print_count(clp, count, "locked files"); | |
4825 | return count; | |
4826 | } | |
4827 | ||
4dbdbda8 BS |
4828 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
4829 | { | |
4830 | struct nfs4_openowner *oop, *next; | |
4831 | u64 count = 0; | |
4832 | ||
4833 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
4834 | if (func) | |
4835 | func(oop); | |
4836 | if (++count == max) | |
4837 | break; | |
4838 | } | |
4839 | ||
4840 | return count; | |
4841 | } | |
4842 | ||
4843 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
4844 | { | |
4845 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
4846 | } | |
4847 | ||
184c1847 BS |
4848 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
4849 | { | |
4850 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
4851 | nfsd_print_count(clp, count, "open files"); | |
4852 | return count; | |
4853 | } | |
4854 | ||
269de30f BS |
4855 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
4856 | struct list_head *victims) | |
4857 | { | |
4858 | struct nfs4_delegation *dp, *next; | |
4859 | u64 count = 0; | |
4860 | ||
4861 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { | |
4862 | if (victims) | |
4863 | list_move(&dp->dl_recall_lru, victims); | |
4864 | if (++count == max) | |
4865 | break; | |
4866 | } | |
4867 | return count; | |
4868 | } | |
4869 | ||
4870 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
4871 | { | |
4872 | struct nfs4_delegation *dp, *next; | |
4873 | LIST_HEAD(victims); | |
4874 | u64 count; | |
4875 | ||
4876 | spin_lock(&recall_lock); | |
4877 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4878 | spin_unlock(&recall_lock); | |
4879 | ||
4880 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
3bd64a5b | 4881 | revoke_delegation(dp); |
269de30f BS |
4882 | |
4883 | return count; | |
4884 | } | |
4885 | ||
4886 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
4887 | { | |
4888 | struct nfs4_delegation *dp, *next; | |
4889 | LIST_HEAD(victims); | |
4890 | u64 count; | |
4891 | ||
4892 | spin_lock(&recall_lock); | |
4893 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4894 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4895 | nfsd_break_one_deleg(dp); | |
4896 | spin_unlock(&recall_lock); | |
4897 | ||
4898 | return count; | |
4899 | } | |
4900 | ||
184c1847 BS |
4901 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
4902 | { | |
4903 | u64 count = 0; | |
4904 | ||
4905 | spin_lock(&recall_lock); | |
4906 | count = nfsd_find_all_delegations(clp, max, NULL); | |
4907 | spin_unlock(&recall_lock); | |
4908 | ||
4909 | nfsd_print_count(clp, count, "delegations"); | |
4910 | return count; | |
4911 | } | |
4912 | ||
44e34da6 | 4913 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
4914 | { |
4915 | struct nfs4_client *clp, *next; | |
44e34da6 | 4916 | u64 count = 0; |
3320fef1 | 4917 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 4918 | |
44e34da6 BS |
4919 | if (!nfsd_netns_ready(nn)) |
4920 | return 0; | |
4921 | ||
5ed58bb2 | 4922 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
4923 | count += func(clp, max - count); |
4924 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
4925 | break; |
4926 | } | |
65178db4 | 4927 | |
44e34da6 BS |
4928 | return count; |
4929 | } | |
4930 | ||
6c1e82a4 BS |
4931 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
4932 | { | |
4933 | struct nfs4_client *clp; | |
4934 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
4935 | ||
4936 | if (!nfsd_netns_ready(nn)) | |
4937 | return NULL; | |
4938 | ||
4939 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
4940 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
4941 | return clp; | |
4942 | } | |
4943 | return NULL; | |
4944 | } | |
4945 | ||
65178db4 BS |
4946 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
4947 | ||
ac4d8ff2 | 4948 | /* initialization to perform at module load time: */ |
1da177e4 | 4949 | |
72083396 | 4950 | void |
ac4d8ff2 | 4951 | nfs4_state_init(void) |
1da177e4 | 4952 | { |
ac4d8ff2 N |
4953 | } |
4954 | ||
c2f1a551 MS |
4955 | /* |
4956 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4957 | * client may quite reasonably hang on to a delegation as long as it has | |
4958 | * the inode cached. This becomes an obvious problem the first time a | |
4959 | * client's inode cache approaches the size of the server's total memory. | |
4960 | * | |
4961 | * For now we avoid this problem by imposing a hard limit on the number | |
4962 | * of delegations, which varies according to the server's memory size. | |
4963 | */ | |
4964 | static void | |
4965 | set_max_delegations(void) | |
4966 | { | |
4967 | /* | |
4968 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4969 | * estimates suggest that in the worst case (where every delegation | |
4970 | * is for a different inode), a delegation could take about 1.5K, | |
4971 | * giving a worst case usage of about 6% of memory. | |
4972 | */ | |
4973 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4974 | } | |
4975 | ||
d85ed443 | 4976 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
4977 | { |
4978 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4979 | int i; | |
4980 | ||
4981 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
4982 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4983 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 4984 | goto err; |
0a7ec377 SK |
4985 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
4986 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4987 | if (!nn->unconf_id_hashtbl) | |
4988 | goto err_unconf_id; | |
9b531137 SK |
4989 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
4990 | OWNER_HASH_SIZE, GFP_KERNEL); | |
4991 | if (!nn->ownerstr_hashtbl) | |
4992 | goto err_ownerstr; | |
20e9e2bc SK |
4993 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
4994 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); | |
4995 | if (!nn->lockowner_ino_hashtbl) | |
4996 | goto err_lockowner_ino; | |
1872de0e SK |
4997 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
4998 | SESSION_HASH_SIZE, GFP_KERNEL); | |
4999 | if (!nn->sessionid_hashtbl) | |
5000 | goto err_sessionid; | |
8daae4dc | 5001 | |
382a62e7 | 5002 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5003 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5004 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5005 | } |
9b531137 SK |
5006 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
5007 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
20e9e2bc SK |
5008 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
5009 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); | |
1872de0e SK |
5010 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5011 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5012 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5013 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5014 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5015 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5016 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5017 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5018 | |
09121281 | 5019 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5020 | get_net(net); |
09121281 | 5021 | |
8daae4dc | 5022 | return 0; |
382a62e7 | 5023 | |
1872de0e SK |
5024 | err_sessionid: |
5025 | kfree(nn->lockowner_ino_hashtbl); | |
20e9e2bc SK |
5026 | err_lockowner_ino: |
5027 | kfree(nn->ownerstr_hashtbl); | |
9b531137 SK |
5028 | err_ownerstr: |
5029 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5030 | err_unconf_id: |
5031 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5032 | err: |
5033 | return -ENOMEM; | |
8daae4dc SK |
5034 | } |
5035 | ||
5036 | static void | |
4dce0ac9 | 5037 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5038 | { |
5039 | int i; | |
5040 | struct nfs4_client *clp = NULL; | |
5041 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
a99454aa | 5042 | struct rb_node *node, *tmp; |
8daae4dc SK |
5043 | |
5044 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5045 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5046 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5047 | destroy_client(clp); | |
5048 | } | |
5049 | } | |
a99454aa SK |
5050 | |
5051 | node = rb_first(&nn->unconf_name_tree); | |
5052 | while (node != NULL) { | |
5053 | tmp = node; | |
5054 | node = rb_next(tmp); | |
5055 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
5056 | rb_erase(tmp, &nn->unconf_name_tree); | |
5057 | destroy_client(clp); | |
5058 | } | |
5059 | ||
1872de0e | 5060 | kfree(nn->sessionid_hashtbl); |
20e9e2bc | 5061 | kfree(nn->lockowner_ino_hashtbl); |
9b531137 | 5062 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5063 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5064 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5065 | put_net(net); |
8daae4dc SK |
5066 | } |
5067 | ||
f252bc68 | 5068 | int |
d85ed443 | 5069 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5070 | { |
5e1533c7 | 5071 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5072 | int ret; |
5073 | ||
d85ed443 | 5074 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5075 | if (ret) |
5076 | return ret; | |
5e1533c7 | 5077 | nfsd4_client_tracking_init(net); |
2c142baa | 5078 | nn->boot_time = get_seconds(); |
5ccb0066 | 5079 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5080 | nn->grace_ended = false; |
d85ed443 | 5081 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5082 | nn->nfsd4_grace, net); |
5083 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5084 | return 0; |
5085 | } | |
5086 | ||
5087 | /* initialization to perform when the nfsd service is started: */ | |
5088 | ||
5089 | int | |
5090 | nfs4_state_start(void) | |
5091 | { | |
5092 | int ret; | |
5093 | ||
b5a1a81e | 5094 | ret = set_callback_cred(); |
d85ed443 SK |
5095 | if (ret) |
5096 | return -ENOMEM; | |
58da282b | 5097 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5098 | if (laundry_wq == NULL) { |
5099 | ret = -ENOMEM; | |
5100 | goto out_recovery; | |
5101 | } | |
b5a1a81e BF |
5102 | ret = nfsd4_create_callback_queue(); |
5103 | if (ret) | |
5104 | goto out_free_laundry; | |
09121281 | 5105 | |
c2f1a551 | 5106 | set_max_delegations(); |
d85ed443 | 5107 | |
b5a1a81e | 5108 | return 0; |
d85ed443 | 5109 | |
b5a1a81e BF |
5110 | out_free_laundry: |
5111 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5112 | out_recovery: |
b5a1a81e | 5113 | return ret; |
1da177e4 LT |
5114 | } |
5115 | ||
ac55fdc4 | 5116 | /* should be called with the state lock held */ |
f252bc68 | 5117 | void |
4dce0ac9 | 5118 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5119 | { |
1da177e4 | 5120 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5121 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5122 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5123 | |
4dce0ac9 SK |
5124 | cancel_delayed_work_sync(&nn->laundromat_work); |
5125 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5126 | |
1da177e4 LT |
5127 | INIT_LIST_HEAD(&reaplist); |
5128 | spin_lock(&recall_lock); | |
e8c69d17 | 5129 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
5130 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
5131 | list_move(&dp->dl_recall_lru, &reaplist); | |
5132 | } | |
5133 | spin_unlock(&recall_lock); | |
5134 | list_for_each_safe(pos, next, &reaplist) { | |
5135 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 5136 | destroy_delegation(dp); |
1da177e4 LT |
5137 | } |
5138 | ||
3320fef1 | 5139 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5140 | nfs4_state_destroy_net(net); |
1da177e4 LT |
5141 | } |
5142 | ||
5143 | void | |
5144 | nfs4_state_shutdown(void) | |
5145 | { | |
5e8d5c29 | 5146 | destroy_workqueue(laundry_wq); |
c3935e30 | 5147 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5148 | } |
8b70484c TM |
5149 | |
5150 | static void | |
5151 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5152 | { | |
37c593c5 TM |
5153 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5154 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5155 | } |
5156 | ||
5157 | static void | |
5158 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5159 | { | |
37c593c5 TM |
5160 | if (cstate->minorversion) { |
5161 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5162 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5163 | } | |
5164 | } | |
5165 | ||
5166 | void | |
5167 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5168 | { | |
5169 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5170 | } |
5171 | ||
62cd4a59 TM |
5172 | /* |
5173 | * functions to set current state id | |
5174 | */ | |
9428fe1a TM |
5175 | void |
5176 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5177 | { | |
5178 | put_stateid(cstate, &odp->od_stateid); | |
5179 | } | |
5180 | ||
8b70484c TM |
5181 | void |
5182 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5183 | { | |
5184 | put_stateid(cstate, &open->op_stateid); | |
5185 | } | |
5186 | ||
62cd4a59 TM |
5187 | void |
5188 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5189 | { | |
5190 | put_stateid(cstate, &close->cl_stateid); | |
5191 | } | |
5192 | ||
5193 | void | |
5194 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5195 | { | |
5196 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5197 | } | |
5198 | ||
5199 | /* | |
5200 | * functions to consume current state id | |
5201 | */ | |
1e97b519 | 5202 | |
9428fe1a TM |
5203 | void |
5204 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5205 | { | |
5206 | get_stateid(cstate, &odp->od_stateid); | |
5207 | } | |
5208 | ||
5209 | void | |
5210 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5211 | { | |
5212 | get_stateid(cstate, &drp->dr_stateid); | |
5213 | } | |
5214 | ||
1e97b519 TM |
5215 | void |
5216 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5217 | { | |
5218 | get_stateid(cstate, &fsp->fr_stateid); | |
5219 | } | |
5220 | ||
5221 | void | |
5222 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5223 | { | |
5224 | get_stateid(cstate, &setattr->sa_stateid); | |
5225 | } | |
5226 | ||
8b70484c TM |
5227 | void |
5228 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5229 | { | |
5230 | get_stateid(cstate, &close->cl_stateid); | |
5231 | } | |
5232 | ||
5233 | void | |
62cd4a59 | 5234 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5235 | { |
62cd4a59 | 5236 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5237 | } |
30813e27 TM |
5238 | |
5239 | void | |
5240 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5241 | { | |
5242 | get_stateid(cstate, &read->rd_stateid); | |
5243 | } | |
5244 | ||
5245 | void | |
5246 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5247 | { | |
5248 | get_stateid(cstate, &write->wr_stateid); | |
5249 | } |