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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
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; | |
1da177e4 LT |
371 | |
372 | dprintk("NFSD alloc_init_deleg\n"); | |
c2f1a551 | 373 | if (num_delegations > max_delegations) |
ef0f3390 | 374 | return NULL; |
996e0938 | 375 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 376 | if (dp == NULL) |
1da177e4 | 377 | return dp; |
3abdb607 | 378 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
2a74aba7 BF |
379 | /* |
380 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
381 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
382 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
383 | */ |
384 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 385 | num_delegations++; |
ea1da636 N |
386 | INIT_LIST_HEAD(&dp->dl_perfile); |
387 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 388 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
bf7bd3e9 | 389 | dp->dl_file = NULL; |
99c41515 | 390 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
6c02eaa1 | 391 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
392 | dp->dl_time = 0; |
393 | atomic_set(&dp->dl_count, 1); | |
57725155 | 394 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
395 | return dp; |
396 | } | |
397 | ||
68a33961 | 398 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
399 | { |
400 | struct idr *stateids = &s->sc_client->cl_stateids; | |
401 | ||
402 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
403 | } |
404 | ||
1da177e4 LT |
405 | void |
406 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
407 | { | |
408 | if (atomic_dec_and_test(&dp->dl_count)) { | |
68a33961 | 409 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 410 | num_delegations--; |
1da177e4 LT |
411 | } |
412 | } | |
413 | ||
acfdf5c3 | 414 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 415 | { |
acfdf5c3 BF |
416 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
417 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
418 | fp->fi_lease = NULL; | |
4ee63624 | 419 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
420 | fp->fi_deleg_file = NULL; |
421 | } | |
1da177e4 LT |
422 | } |
423 | ||
6136d2b4 BF |
424 | static void unhash_stid(struct nfs4_stid *s) |
425 | { | |
3abdb607 | 426 | s->sc_type = 0; |
6136d2b4 BF |
427 | } |
428 | ||
1da177e4 LT |
429 | /* Called under the state lock. */ |
430 | static void | |
431 | unhash_delegation(struct nfs4_delegation *dp) | |
432 | { | |
ea1da636 | 433 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 434 | spin_lock(&recall_lock); |
5d926e8c | 435 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
436 | list_del_init(&dp->dl_recall_lru); |
437 | spin_unlock(&recall_lock); | |
acfdf5c3 | 438 | nfs4_put_deleg_lease(dp->dl_file); |
68a33961 BF |
439 | put_nfs4_file(dp->dl_file); |
440 | dp->dl_file = NULL; | |
3bd64a5b BF |
441 | } |
442 | ||
443 | ||
444 | ||
445 | static void destroy_revoked_delegation(struct nfs4_delegation *dp) | |
446 | { | |
447 | list_del_init(&dp->dl_recall_lru); | |
68a33961 | 448 | remove_stid(&dp->dl_stid); |
1da177e4 LT |
449 | nfs4_put_delegation(dp); |
450 | } | |
451 | ||
3bd64a5b BF |
452 | static void destroy_delegation(struct nfs4_delegation *dp) |
453 | { | |
454 | unhash_delegation(dp); | |
455 | remove_stid(&dp->dl_stid); | |
456 | nfs4_put_delegation(dp); | |
457 | } | |
458 | ||
459 | static void revoke_delegation(struct nfs4_delegation *dp) | |
460 | { | |
461 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
462 | ||
463 | if (clp->cl_minorversion == 0) | |
464 | destroy_delegation(dp); | |
465 | else { | |
466 | unhash_delegation(dp); | |
467 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; | |
468 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
469 | } | |
470 | } | |
471 | ||
1da177e4 LT |
472 | /* |
473 | * SETCLIENTID state | |
474 | */ | |
475 | ||
ddc04c41 BF |
476 | static unsigned int clientid_hashval(u32 id) |
477 | { | |
478 | return id & CLIENT_HASH_MASK; | |
479 | } | |
480 | ||
481 | static unsigned int clientstr_hashval(const char *name) | |
482 | { | |
483 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
484 | } | |
485 | ||
f9d7562f BF |
486 | /* |
487 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
488 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
489 | * only what share bits are currently in force, but also what | |
490 | * combinations of share bits previous opens have used. This allows us | |
491 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
492 | * return an error if the client attempt to downgrade to a combination | |
493 | * of share bits not explicable by closing some of its previous opens. | |
494 | * | |
495 | * XXX: This enforcement is actually incomplete, since we don't keep | |
496 | * track of access/deny bit combinations; so, e.g., we allow: | |
497 | * | |
498 | * OPEN allow read, deny write | |
499 | * OPEN allow both, deny none | |
500 | * DOWNGRADE allow read, deny none | |
501 | * | |
502 | * which we should reject. | |
503 | */ | |
5ae037e5 JL |
504 | static unsigned int |
505 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 506 | int i; |
5ae037e5 | 507 | unsigned int access = 0; |
f9d7562f | 508 | |
f9d7562f BF |
509 | for (i = 1; i < 4; i++) { |
510 | if (test_bit(i, &bmap)) | |
5ae037e5 | 511 | access |= i; |
f9d7562f | 512 | } |
5ae037e5 | 513 | return access; |
f9d7562f BF |
514 | } |
515 | ||
3a328614 | 516 | static bool |
dcef0413 | 517 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
518 | unsigned int access, deny; |
519 | ||
5ae037e5 JL |
520 | access = bmap_to_share_mode(stp->st_access_bmap); |
521 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 522 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
523 | return false; |
524 | return true; | |
f9d7562f BF |
525 | } |
526 | ||
82c5ff1b JL |
527 | /* set share access for a given stateid */ |
528 | static inline void | |
529 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
530 | { | |
531 | __set_bit(access, &stp->st_access_bmap); | |
532 | } | |
533 | ||
534 | /* clear share access for a given stateid */ | |
535 | static inline void | |
536 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
537 | { | |
538 | __clear_bit(access, &stp->st_access_bmap); | |
539 | } | |
540 | ||
541 | /* test whether a given stateid has access */ | |
542 | static inline bool | |
543 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
544 | { | |
545 | return test_bit(access, &stp->st_access_bmap); | |
546 | } | |
547 | ||
ce0fc43c JL |
548 | /* set share deny for a given stateid */ |
549 | static inline void | |
550 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
551 | { | |
552 | __set_bit(access, &stp->st_deny_bmap); | |
553 | } | |
554 | ||
555 | /* clear share deny for a given stateid */ | |
556 | static inline void | |
557 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
558 | { | |
559 | __clear_bit(access, &stp->st_deny_bmap); | |
560 | } | |
561 | ||
562 | /* test whether a given stateid is denying specific access */ | |
563 | static inline bool | |
564 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
565 | { | |
566 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
567 | } |
568 | ||
569 | static int nfs4_access_to_omode(u32 access) | |
570 | { | |
8f34a430 | 571 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
572 | case NFS4_SHARE_ACCESS_READ: |
573 | return O_RDONLY; | |
574 | case NFS4_SHARE_ACCESS_WRITE: | |
575 | return O_WRONLY; | |
576 | case NFS4_SHARE_ACCESS_BOTH: | |
577 | return O_RDWR; | |
578 | } | |
063b0fb9 BF |
579 | WARN_ON_ONCE(1); |
580 | return O_RDONLY; | |
f9d7562f BF |
581 | } |
582 | ||
82c5ff1b JL |
583 | /* release all access and file references for a given stateid */ |
584 | static void | |
585 | release_all_access(struct nfs4_ol_stateid *stp) | |
586 | { | |
587 | int i; | |
588 | ||
589 | for (i = 1; i < 4; i++) { | |
590 | if (test_access(i, stp)) | |
591 | nfs4_file_put_access(stp->st_file, | |
592 | nfs4_access_to_omode(i)); | |
593 | clear_access(i, stp); | |
594 | } | |
595 | } | |
596 | ||
dcef0413 | 597 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 598 | { |
529d7b2a BF |
599 | list_del(&stp->st_perfile); |
600 | list_del(&stp->st_perstateowner); | |
601 | } | |
602 | ||
dcef0413 | 603 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 604 | { |
82c5ff1b | 605 | release_all_access(stp); |
a96e5b90 | 606 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
607 | stp->st_file = NULL; |
608 | } | |
609 | ||
dcef0413 | 610 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 611 | { |
68a33961 BF |
612 | remove_stid(&stp->st_stid); |
613 | kmem_cache_free(stateid_slab, stp); | |
529d7b2a BF |
614 | } |
615 | ||
dcef0413 | 616 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
617 | { |
618 | struct file *file; | |
619 | ||
620 | unhash_generic_stateid(stp); | |
6136d2b4 | 621 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
622 | file = find_any_file(stp->st_file); |
623 | if (file) | |
fe0750e5 | 624 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 625 | close_generic_stateid(stp); |
529d7b2a BF |
626 | free_generic_stateid(stp); |
627 | } | |
628 | ||
fe0750e5 | 629 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 630 | { |
dcef0413 | 631 | struct nfs4_ol_stateid *stp; |
529d7b2a | 632 | |
fe0750e5 BF |
633 | list_del(&lo->lo_owner.so_strhash); |
634 | list_del(&lo->lo_perstateid); | |
009673b4 | 635 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
636 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
637 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 638 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
639 | release_lock_stateid(stp); |
640 | } | |
641 | } | |
642 | ||
fe0750e5 | 643 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 644 | { |
fe0750e5 BF |
645 | unhash_lockowner(lo); |
646 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
647 | } |
648 | ||
649 | static void | |
dcef0413 | 650 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 651 | { |
fe0750e5 | 652 | struct nfs4_lockowner *lo; |
529d7b2a BF |
653 | |
654 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
655 | lo = list_entry(open_stp->st_lockowners.next, |
656 | struct nfs4_lockowner, lo_perstateid); | |
657 | release_lockowner(lo); | |
529d7b2a BF |
658 | } |
659 | } | |
660 | ||
38c387b5 | 661 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
662 | { |
663 | unhash_generic_stateid(stp); | |
664 | release_stateid_lockowners(stp); | |
38c387b5 BF |
665 | close_generic_stateid(stp); |
666 | } | |
667 | ||
668 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
669 | { | |
670 | unhash_open_stateid(stp); | |
6136d2b4 | 671 | unhash_stid(&stp->st_stid); |
2283963f BF |
672 | free_generic_stateid(stp); |
673 | } | |
674 | ||
fe0750e5 | 675 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 676 | { |
dcef0413 | 677 | struct nfs4_ol_stateid *stp; |
f1d110ca | 678 | |
fe0750e5 BF |
679 | list_del(&oo->oo_owner.so_strhash); |
680 | list_del(&oo->oo_perclient); | |
681 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
682 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 683 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 684 | release_open_stateid(stp); |
f1d110ca BF |
685 | } |
686 | } | |
687 | ||
f7a4d872 BF |
688 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
689 | { | |
690 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
691 | ||
692 | if (s) { | |
6136d2b4 | 693 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
694 | free_generic_stateid(s); |
695 | oo->oo_last_closed_stid = NULL; | |
696 | } | |
697 | } | |
698 | ||
fe0750e5 | 699 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 700 | { |
fe0750e5 BF |
701 | unhash_openowner(oo); |
702 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 703 | release_last_closed_stateid(oo); |
fe0750e5 | 704 | nfs4_free_openowner(oo); |
f1d110ca BF |
705 | } |
706 | ||
5282fd72 ME |
707 | static inline int |
708 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
709 | { | |
710 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
711 | ||
712 | return sid->sequence % SESSION_HASH_SIZE; | |
713 | } | |
714 | ||
8f199b82 | 715 | #ifdef NFSD_DEBUG |
5282fd72 ME |
716 | static inline void |
717 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
718 | { | |
719 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
720 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
721 | } | |
8f199b82 TM |
722 | #else |
723 | static inline void | |
724 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
725 | { | |
726 | } | |
727 | #endif | |
728 | ||
9411b1d4 BF |
729 | /* |
730 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
731 | * won't be used for replay. | |
732 | */ | |
733 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
734 | { | |
735 | struct nfs4_stateowner *so = cstate->replay_owner; | |
736 | ||
737 | if (nfserr == nfserr_replay_me) | |
738 | return; | |
739 | ||
740 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
741 | cstate->replay_owner = NULL; | |
742 | return; | |
743 | } | |
744 | if (!so) | |
745 | return; | |
746 | if (so->so_is_open_owner) | |
747 | release_last_closed_stateid(openowner(so)); | |
748 | so->so_seqid++; | |
749 | return; | |
750 | } | |
5282fd72 | 751 | |
ec6b5d7b AA |
752 | static void |
753 | gen_sessionid(struct nfsd4_session *ses) | |
754 | { | |
755 | struct nfs4_client *clp = ses->se_client; | |
756 | struct nfsd4_sessionid *sid; | |
757 | ||
758 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
759 | sid->clientid = clp->cl_clientid; | |
760 | sid->sequence = current_sessionid++; | |
761 | sid->reserved = 0; | |
762 | } | |
763 | ||
764 | /* | |
a649637c AA |
765 | * The protocol defines ca_maxresponssize_cached to include the size of |
766 | * the rpc header, but all we need to cache is the data starting after | |
767 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
768 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
769 | * value that is the number of bytes in our cache plus a few additional | |
770 | * bytes. In order to stay on the safe side, and not promise more than | |
771 | * we can cache, those additional bytes must be the minimum possible: 24 | |
772 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
773 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
774 | * for the SEQUENCE op response: | |
775 | */ | |
776 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
777 | ||
557ce264 AA |
778 | static void |
779 | free_session_slots(struct nfsd4_session *ses) | |
780 | { | |
781 | int i; | |
782 | ||
783 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
784 | kfree(ses->se_slots[i]); | |
785 | } | |
786 | ||
a649637c | 787 | /* |
efe0cb6d BF |
788 | * We don't actually need to cache the rpc and session headers, so we |
789 | * can allocate a little less for each slot: | |
790 | */ | |
55c760cf | 791 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 792 | { |
55c760cf | 793 | u32 size; |
efe0cb6d | 794 | |
55c760cf BF |
795 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
796 | size = 0; | |
797 | else | |
798 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
799 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 800 | } |
ec6b5d7b | 801 | |
5b6feee9 BF |
802 | /* |
803 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 804 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 805 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 806 | */ |
55c760cf | 807 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 808 | { |
55c760cf BF |
809 | u32 slotsize = slot_bytes(ca); |
810 | u32 num = ca->maxreqs; | |
5b6feee9 | 811 | int avail; |
ec6b5d7b | 812 | |
5b6feee9 | 813 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
814 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
815 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
816 | num = min_t(int, num, avail / slotsize); |
817 | nfsd_drc_mem_used += num * slotsize; | |
818 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 819 | |
5b6feee9 BF |
820 | return num; |
821 | } | |
ec6b5d7b | 822 | |
55c760cf | 823 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 824 | { |
55c760cf BF |
825 | int slotsize = slot_bytes(ca); |
826 | ||
4bd9b0f4 | 827 | spin_lock(&nfsd_drc_lock); |
55c760cf | 828 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 829 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 830 | } |
ec6b5d7b | 831 | |
55c760cf | 832 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *attrs) |
5b6feee9 | 833 | { |
55c760cf BF |
834 | int numslots = attrs->maxreqs; |
835 | int slotsize = slot_bytes(attrs); | |
5b6feee9 BF |
836 | struct nfsd4_session *new; |
837 | int mem, i; | |
a649637c | 838 | |
5b6feee9 BF |
839 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
840 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
841 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 842 | |
5b6feee9 BF |
843 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
844 | if (!new) | |
845 | return NULL; | |
557ce264 | 846 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 847 | for (i = 0; i < numslots; i++) { |
55c760cf | 848 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 849 | if (!new->se_slots[i]) |
557ce264 | 850 | goto out_free; |
557ce264 | 851 | } |
5b6feee9 BF |
852 | return new; |
853 | out_free: | |
854 | while (i--) | |
855 | kfree(new->se_slots[i]); | |
856 | kfree(new); | |
857 | return NULL; | |
ec6b5d7b AA |
858 | } |
859 | ||
19cf5c02 BF |
860 | static void free_conn(struct nfsd4_conn *c) |
861 | { | |
862 | svc_xprt_put(c->cn_xprt); | |
863 | kfree(c); | |
864 | } | |
ec6b5d7b | 865 | |
19cf5c02 BF |
866 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
867 | { | |
868 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
869 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 870 | |
19cf5c02 BF |
871 | spin_lock(&clp->cl_lock); |
872 | if (!list_empty(&c->cn_persession)) { | |
873 | list_del(&c->cn_persession); | |
874 | free_conn(c); | |
875 | } | |
eea49806 | 876 | nfsd4_probe_callback(clp); |
2e4b7239 | 877 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 878 | } |
ec6b5d7b | 879 | |
d29c374c | 880 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 881 | { |
c7662518 | 882 | struct nfsd4_conn *conn; |
ec6b5d7b | 883 | |
c7662518 BF |
884 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
885 | if (!conn) | |
db90681d | 886 | return NULL; |
c7662518 BF |
887 | svc_xprt_get(rqstp->rq_xprt); |
888 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 889 | conn->cn_flags = flags; |
db90681d BF |
890 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
891 | return conn; | |
892 | } | |
a649637c | 893 | |
328ead28 BF |
894 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
895 | { | |
896 | conn->cn_session = ses; | |
897 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
898 | } |
899 | ||
db90681d | 900 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 901 | { |
db90681d | 902 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 903 | |
c7662518 | 904 | spin_lock(&clp->cl_lock); |
328ead28 | 905 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 906 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
907 | } |
908 | ||
21b75b01 | 909 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 910 | { |
19cf5c02 | 911 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 912 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
913 | } |
914 | ||
e1ff371f | 915 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 916 | { |
21b75b01 | 917 | int ret; |
ec6b5d7b | 918 | |
db90681d | 919 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
920 | ret = nfsd4_register_conn(conn); |
921 | if (ret) | |
922 | /* oops; xprt is already down: */ | |
923 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 924 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
925 | /* callback channel may be back up */ |
926 | nfsd4_probe_callback(ses->se_client); | |
927 | } | |
c7662518 | 928 | } |
ec6b5d7b | 929 | |
e1ff371f | 930 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
931 | { |
932 | u32 dir = NFS4_CDFC4_FORE; | |
933 | ||
e1ff371f | 934 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 935 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 936 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
937 | } |
938 | ||
939 | /* must be called under client_lock */ | |
19cf5c02 | 940 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 941 | { |
19cf5c02 BF |
942 | struct nfs4_client *clp = s->se_client; |
943 | struct nfsd4_conn *c; | |
ec6b5d7b | 944 | |
19cf5c02 BF |
945 | spin_lock(&clp->cl_lock); |
946 | while (!list_empty(&s->se_conns)) { | |
947 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
948 | list_del_init(&c->cn_persession); | |
949 | spin_unlock(&clp->cl_lock); | |
557ce264 | 950 | |
19cf5c02 BF |
951 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
952 | free_conn(c); | |
ec6b5d7b | 953 | |
19cf5c02 BF |
954 | spin_lock(&clp->cl_lock); |
955 | } | |
956 | spin_unlock(&clp->cl_lock); | |
c7662518 | 957 | } |
ec6b5d7b | 958 | |
1377b69e BF |
959 | static void __free_session(struct nfsd4_session *ses) |
960 | { | |
1377b69e BF |
961 | free_session_slots(ses); |
962 | kfree(ses); | |
963 | } | |
964 | ||
66b2b9b2 | 965 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 966 | { |
66b2b9b2 | 967 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
968 | |
969 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 970 | nfsd4_del_conns(ses); |
55c760cf | 971 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 972 | __free_session(ses); |
c7662518 BF |
973 | } |
974 | ||
135ae827 | 975 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 976 | { |
a827bcb2 | 977 | int idx; |
1872de0e | 978 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 979 | |
ec6b5d7b AA |
980 | new->se_client = clp; |
981 | gen_sessionid(new); | |
ec6b5d7b | 982 | |
c7662518 BF |
983 | INIT_LIST_HEAD(&new->se_conns); |
984 | ||
ac7c46f2 | 985 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 986 | new->se_flags = cses->flags; |
8b5ce5cd | 987 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 988 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 989 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 990 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 991 | spin_lock(&nn->client_lock); |
1872de0e | 992 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 993 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 994 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 995 | spin_unlock(&clp->cl_lock); |
c9a49628 | 996 | spin_unlock(&nn->client_lock); |
55c760cf BF |
997 | memcpy(&new->se_fchannel, &cses->fore_channel, |
998 | sizeof(struct nfsd4_channel_attrs)); | |
dcbeaa68 | 999 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1000 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1001 | /* |
1002 | * This is a little silly; with sessions there's no real | |
1003 | * use for the callback address. Use the peer address | |
1004 | * as a reasonable default for now, but consider fixing | |
1005 | * the rpc client not to require an address in the | |
1006 | * future: | |
1007 | */ | |
edd76786 BF |
1008 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1009 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1010 | } |
ec6b5d7b AA |
1011 | } |
1012 | ||
9089f1b4 | 1013 | /* caller must hold client_lock */ |
5282fd72 | 1014 | static struct nfsd4_session * |
1872de0e | 1015 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1016 | { |
1017 | struct nfsd4_session *elem; | |
1018 | int idx; | |
1872de0e | 1019 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1020 | |
1021 | dump_sessionid(__func__, sessionid); | |
1022 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1023 | /* Search in the appropriate list */ |
1872de0e | 1024 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1025 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1026 | NFS4_MAX_SESSIONID_LEN)) { | |
1027 | return elem; | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | dprintk("%s: session not found\n", __func__); | |
1032 | return NULL; | |
1033 | } | |
1034 | ||
9089f1b4 | 1035 | /* caller must hold client_lock */ |
7116ed6b | 1036 | static void |
5282fd72 | 1037 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1038 | { |
1039 | list_del(&ses->se_hash); | |
4c649378 | 1040 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1041 | list_del(&ses->se_perclnt); |
4c649378 | 1042 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1043 | } |
1044 | ||
1da177e4 LT |
1045 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1046 | static int | |
2c142baa | 1047 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1048 | { |
2c142baa | 1049 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1050 | return 0; |
60adfc50 | 1051 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1052 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1053 | return 1; |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * XXX Should we use a slab cache ? | |
1058 | * This type of memory management is somewhat inefficient, but we use it | |
1059 | * anyway since SETCLIENTID is not a common operation. | |
1060 | */ | |
35bba9a3 | 1061 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1062 | { |
1063 | struct nfs4_client *clp; | |
1064 | ||
35bba9a3 BF |
1065 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1066 | if (clp == NULL) | |
1067 | return NULL; | |
67114fe6 | 1068 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1069 | if (clp->cl_name.data == NULL) { |
1070 | kfree(clp); | |
1071 | return NULL; | |
1da177e4 | 1072 | } |
35bba9a3 | 1073 | clp->cl_name.len = name.len; |
1da177e4 LT |
1074 | return clp; |
1075 | } | |
1076 | ||
1077 | static inline void | |
1078 | free_client(struct nfs4_client *clp) | |
1079 | { | |
bca0ec65 | 1080 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1081 | |
1082 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1083 | while (!list_empty(&clp->cl_sessions)) { |
1084 | struct nfsd4_session *ses; | |
1085 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1086 | se_perclnt); | |
1087 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1088 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1089 | free_session(ses); | |
792c95dd | 1090 | } |
03a4e1f6 | 1091 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1092 | kfree(clp->cl_name.data); |
2d32b29a | 1093 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1094 | kfree(clp); |
1095 | } | |
1096 | ||
84d38ac9 BH |
1097 | /* must be called under the client_lock */ |
1098 | static inline void | |
1099 | unhash_client_locked(struct nfs4_client *clp) | |
1100 | { | |
792c95dd BF |
1101 | struct nfsd4_session *ses; |
1102 | ||
84d38ac9 | 1103 | list_del(&clp->cl_lru); |
4c649378 | 1104 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1105 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1106 | list_del_init(&ses->se_hash); | |
4c649378 | 1107 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1108 | } |
1109 | ||
1da177e4 | 1110 | static void |
0d22f68f | 1111 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1112 | { |
fe0750e5 | 1113 | struct nfs4_openowner *oo; |
1da177e4 | 1114 | struct nfs4_delegation *dp; |
1da177e4 | 1115 | struct list_head reaplist; |
382a62e7 | 1116 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1117 | |
1da177e4 LT |
1118 | INIT_LIST_HEAD(&reaplist); |
1119 | spin_lock(&recall_lock); | |
ea1da636 N |
1120 | while (!list_empty(&clp->cl_delegations)) { |
1121 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1122 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1123 | list_move(&dp->dl_recall_lru, &reaplist); |
1124 | } | |
1125 | spin_unlock(&recall_lock); | |
1126 | while (!list_empty(&reaplist)) { | |
1127 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 1128 | destroy_delegation(dp); |
1da177e4 | 1129 | } |
ea1da636 | 1130 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1131 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1132 | release_openowner(oo); | |
1da177e4 | 1133 | } |
6ff8da08 | 1134 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1135 | if (clp->cl_cb_conn.cb_xprt) |
1136 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1137 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1138 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1139 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1140 | else |
a99454aa | 1141 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1142 | spin_lock(&nn->client_lock); |
84d38ac9 | 1143 | unhash_client_locked(clp); |
221a6876 BF |
1144 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1145 | free_client(clp); | |
c9a49628 | 1146 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1147 | } |
1148 | ||
0d22f68f BF |
1149 | static void expire_client(struct nfs4_client *clp) |
1150 | { | |
1151 | nfsd4_client_record_remove(clp); | |
1152 | destroy_client(clp); | |
1153 | } | |
1154 | ||
35bba9a3 BF |
1155 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1156 | { | |
1157 | memcpy(target->cl_verifier.data, source->data, | |
1158 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1159 | } |
1160 | ||
35bba9a3 BF |
1161 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1162 | { | |
1da177e4 LT |
1163 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1164 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1165 | } | |
1166 | ||
03a4e1f6 | 1167 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1168 | { |
03a4e1f6 BF |
1169 | if (source->cr_principal) { |
1170 | target->cr_principal = | |
1171 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1172 | if (target->cr_principal == NULL) | |
1173 | return -ENOMEM; | |
1174 | } else | |
1175 | target->cr_principal = NULL; | |
d5497fc6 | 1176 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1177 | target->cr_uid = source->cr_uid; |
1178 | target->cr_gid = source->cr_gid; | |
1179 | target->cr_group_info = source->cr_group_info; | |
1180 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1181 | target->cr_gss_mech = source->cr_gss_mech; |
1182 | if (source->cr_gss_mech) | |
1183 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1184 | return 0; |
1da177e4 LT |
1185 | } |
1186 | ||
ac55fdc4 JL |
1187 | static long long |
1188 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1189 | { | |
1190 | long long res; | |
1191 | ||
1192 | res = o1->len - o2->len; | |
1193 | if (res) | |
1194 | return res; | |
1195 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1196 | } | |
1197 | ||
35bba9a3 | 1198 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1199 | { |
a55370a3 | 1200 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1201 | } |
1202 | ||
1203 | static int | |
599e0a22 BF |
1204 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1205 | { | |
1206 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1207 | } |
1208 | ||
1209 | static int | |
599e0a22 BF |
1210 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1211 | { | |
1212 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1213 | } |
1214 | ||
8fbba96e BF |
1215 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1216 | { | |
1217 | int i; | |
1218 | ||
1219 | if (g1->ngroups != g2->ngroups) | |
1220 | return false; | |
1221 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1222 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1223 | return false; |
1224 | return true; | |
1225 | } | |
1226 | ||
68eb3508 BF |
1227 | /* |
1228 | * RFC 3530 language requires clid_inuse be returned when the | |
1229 | * "principal" associated with a requests differs from that previously | |
1230 | * used. We use uid, gid's, and gss principal string as our best | |
1231 | * approximation. We also don't want to allow non-gss use of a client | |
1232 | * established using gss: in theory cr_principal should catch that | |
1233 | * change, but in practice cr_principal can be null even in the gss case | |
1234 | * since gssd doesn't always pass down a principal string. | |
1235 | */ | |
1236 | static bool is_gss_cred(struct svc_cred *cr) | |
1237 | { | |
1238 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1239 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1240 | } | |
1241 | ||
1242 | ||
5559b50a | 1243 | static bool |
599e0a22 BF |
1244 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1245 | { | |
68eb3508 | 1246 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1247 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1248 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1249 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1250 | return false; | |
1251 | if (cr1->cr_principal == cr2->cr_principal) | |
1252 | return true; | |
1253 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1254 | return false; | |
5559b50a | 1255 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1256 | } |
1257 | ||
57266a6e BF |
1258 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1259 | { | |
1260 | struct svc_cred *cr = &rqstp->rq_cred; | |
1261 | u32 service; | |
1262 | ||
c4720591 BF |
1263 | if (!cr->cr_gss_mech) |
1264 | return false; | |
57266a6e BF |
1265 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1266 | return service == RPC_GSS_SVC_INTEGRITY || | |
1267 | service == RPC_GSS_SVC_PRIVACY; | |
1268 | } | |
1269 | ||
1270 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1271 | { | |
1272 | struct svc_cred *cr = &rqstp->rq_cred; | |
1273 | ||
1274 | if (!cl->cl_mach_cred) | |
1275 | return true; | |
1276 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1277 | return false; | |
1278 | if (!svc_rqst_integrity_protected(rqstp)) | |
1279 | return false; | |
1280 | if (!cr->cr_principal) | |
1281 | return false; | |
1282 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1283 | } | |
1284 | ||
c212cecf | 1285 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1286 | { |
1287 | static u32 current_clientid = 1; | |
1288 | ||
2c142baa | 1289 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1290 | clp->cl_clientid.cl_id = current_clientid++; |
1291 | } | |
1292 | ||
deda2faa BF |
1293 | static void gen_confirm(struct nfs4_client *clp) |
1294 | { | |
ab4684d1 | 1295 | __be32 verf[2]; |
deda2faa | 1296 | static u32 i; |
1da177e4 | 1297 | |
ab4684d1 CL |
1298 | verf[0] = (__be32)get_seconds(); |
1299 | verf[1] = (__be32)i++; | |
1300 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1301 | } |
1302 | ||
38c2f4b1 | 1303 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1304 | { |
3abdb607 BF |
1305 | struct nfs4_stid *ret; |
1306 | ||
1307 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1308 | if (!ret || !ret->sc_type) | |
1309 | return NULL; | |
1310 | return ret; | |
4d71ab87 BF |
1311 | } |
1312 | ||
38c2f4b1 | 1313 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1314 | { |
1315 | struct nfs4_stid *s; | |
4d71ab87 | 1316 | |
38c2f4b1 | 1317 | s = find_stateid(cl, t); |
4d71ab87 BF |
1318 | if (!s) |
1319 | return NULL; | |
f459e453 | 1320 | if (typemask & s->sc_type) |
4581d140 | 1321 | return s; |
4581d140 BF |
1322 | return NULL; |
1323 | } | |
1324 | ||
2216d449 | 1325 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1326 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1327 | { | |
1328 | struct nfs4_client *clp; | |
1329 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1330 | int ret; |
c212cecf | 1331 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1332 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1333 | |
1334 | clp = alloc_client(name); | |
1335 | if (clp == NULL) | |
1336 | return NULL; | |
1337 | ||
792c95dd | 1338 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1339 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1340 | if (ret) { | |
c9a49628 | 1341 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1342 | free_client(clp); |
c9a49628 | 1343 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1344 | return NULL; |
b09333c4 | 1345 | } |
38c2f4b1 | 1346 | idr_init(&clp->cl_stateids); |
46583e25 | 1347 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1348 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1349 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1350 | INIT_LIST_HEAD(&clp->cl_openowners); |
1351 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1352 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1353 | INIT_LIST_HEAD(&clp->cl_callbacks); |
3bd64a5b | 1354 | INIT_LIST_HEAD(&clp->cl_revoked); |
6ff8da08 | 1355 | spin_lock_init(&clp->cl_lock); |
57725155 | 1356 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1357 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1358 | clear_bit(0, &clp->cl_cb_slot_busy); |
1359 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1360 | copy_verf(clp, verf); | |
1361 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1362 | gen_confirm(clp); |
edd76786 | 1363 | clp->cl_cb_session = NULL; |
c212cecf | 1364 | clp->net = net; |
b09333c4 RL |
1365 | return clp; |
1366 | } | |
1367 | ||
fd39ca9a | 1368 | static void |
ac55fdc4 JL |
1369 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1370 | { | |
1371 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1372 | struct nfs4_client *clp; | |
1373 | ||
1374 | while (*new) { | |
1375 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1376 | parent = *new; | |
1377 | ||
1378 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1379 | new = &((*new)->rb_left); | |
1380 | else | |
1381 | new = &((*new)->rb_right); | |
1382 | } | |
1383 | ||
1384 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1385 | rb_insert_color(&new_clp->cl_namenode, root); | |
1386 | } | |
1387 | ||
1388 | static struct nfs4_client * | |
1389 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1390 | { | |
1391 | long long cmp; | |
1392 | struct rb_node *node = root->rb_node; | |
1393 | struct nfs4_client *clp; | |
1394 | ||
1395 | while (node) { | |
1396 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1397 | cmp = compare_blob(&clp->cl_name, name); | |
1398 | if (cmp > 0) | |
1399 | node = node->rb_left; | |
1400 | else if (cmp < 0) | |
1401 | node = node->rb_right; | |
1402 | else | |
1403 | return clp; | |
1404 | } | |
1405 | return NULL; | |
1406 | } | |
1407 | ||
1408 | static void | |
1409 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1410 | { |
1411 | unsigned int idhashval; | |
0a7ec377 | 1412 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1413 | |
ac55fdc4 | 1414 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1415 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1416 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1417 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1418 | renew_client(clp); |
1da177e4 LT |
1419 | } |
1420 | ||
fd39ca9a | 1421 | static void |
1da177e4 LT |
1422 | move_to_confirmed(struct nfs4_client *clp) |
1423 | { | |
1424 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1425 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1426 | |
1427 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1428 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1429 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1430 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1431 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1432 | renew_client(clp); |
1433 | } | |
1434 | ||
1435 | static struct nfs4_client * | |
bfa85e83 | 1436 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1437 | { |
1438 | struct nfs4_client *clp; | |
1439 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1440 | ||
bfa85e83 | 1441 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1442 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1443 | if ((bool)clp->cl_minorversion != sessions) |
1444 | return NULL; | |
a50d2ad1 | 1445 | renew_client(clp); |
1da177e4 | 1446 | return clp; |
a50d2ad1 | 1447 | } |
1da177e4 LT |
1448 | } |
1449 | return NULL; | |
1450 | } | |
1451 | ||
bfa85e83 BF |
1452 | static struct nfs4_client * |
1453 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1454 | { | |
1455 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1456 | ||
1457 | return find_client_in_id_table(tbl, clid, sessions); | |
1458 | } | |
1459 | ||
1da177e4 | 1460 | static struct nfs4_client * |
0a7ec377 | 1461 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1462 | { |
bfa85e83 | 1463 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1464 | |
bfa85e83 | 1465 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1466 | } |
1467 | ||
6e5f15c9 | 1468 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1469 | { |
6e5f15c9 | 1470 | return clp->cl_exchange_flags != 0; |
e203d506 | 1471 | } |
a1bcecd2 | 1472 | |
28ce6054 | 1473 | static struct nfs4_client * |
382a62e7 | 1474 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1475 | { |
382a62e7 | 1476 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1477 | } |
1478 | ||
1479 | static struct nfs4_client * | |
a99454aa | 1480 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1481 | { |
a99454aa | 1482 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1483 | } |
1484 | ||
fd39ca9a | 1485 | static void |
6f3d772f | 1486 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1487 | { |
07263f1e | 1488 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1489 | struct sockaddr *sa = svc_addr(rqstp); |
1490 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1491 | unsigned short expected_family; |
1492 | ||
1493 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1494 | if (se->se_callback_netid_len == 3 && | |
1495 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1496 | expected_family = AF_INET; | |
1497 | else if (se->se_callback_netid_len == 4 && | |
1498 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1499 | expected_family = AF_INET6; | |
1500 | else | |
1da177e4 LT |
1501 | goto out_err; |
1502 | ||
c212cecf | 1503 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1504 | se->se_callback_addr_len, |
07263f1e BF |
1505 | (struct sockaddr *)&conn->cb_addr, |
1506 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1507 | |
07263f1e | 1508 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1509 | goto out_err; |
aa9a4ec7 | 1510 | |
07263f1e BF |
1511 | if (conn->cb_addr.ss_family == AF_INET6) |
1512 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1513 | |
07263f1e BF |
1514 | conn->cb_prog = se->se_callback_prog; |
1515 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1516 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1517 | return; |
1518 | out_err: | |
07263f1e BF |
1519 | conn->cb_addr.ss_family = AF_UNSPEC; |
1520 | conn->cb_addrlen = 0; | |
849823c5 | 1521 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1522 | "will not receive delegations\n", |
1523 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1524 | ||
1da177e4 LT |
1525 | return; |
1526 | } | |
1527 | ||
074fe897 | 1528 | /* |
557ce264 | 1529 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1530 | */ |
074fe897 AA |
1531 | void |
1532 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1533 | { |
557ce264 AA |
1534 | struct nfsd4_slot *slot = resp->cstate.slot; |
1535 | unsigned int base; | |
074fe897 | 1536 | |
557ce264 | 1537 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1538 | |
557ce264 AA |
1539 | slot->sl_opcnt = resp->opcnt; |
1540 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1541 | |
bf5c43c8 | 1542 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1543 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1544 | slot->sl_datalen = 0; |
bf864a31 | 1545 | return; |
074fe897 | 1546 | } |
557ce264 AA |
1547 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1548 | base = (char *)resp->cstate.datap - | |
1549 | (char *)resp->xbuf->head[0].iov_base; | |
1550 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1551 | slot->sl_datalen)) | |
1552 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1553 | return; | |
074fe897 AA |
1554 | } |
1555 | ||
1556 | /* | |
abfabf8c AA |
1557 | * Encode the replay sequence operation from the slot values. |
1558 | * If cachethis is FALSE encode the uncached rep error on the next | |
1559 | * operation which sets resp->p and increments resp->opcnt for | |
1560 | * nfs4svc_encode_compoundres. | |
074fe897 | 1561 | * |
074fe897 | 1562 | */ |
abfabf8c AA |
1563 | static __be32 |
1564 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1565 | struct nfsd4_compoundres *resp) | |
074fe897 | 1566 | { |
abfabf8c AA |
1567 | struct nfsd4_op *op; |
1568 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1569 | |
abfabf8c AA |
1570 | /* Encode the replayed sequence operation */ |
1571 | op = &args->ops[resp->opcnt - 1]; | |
1572 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1573 | |
abfabf8c | 1574 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1575 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1576 | op = &args->ops[resp->opcnt++]; |
1577 | op->status = nfserr_retry_uncached_rep; | |
1578 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1579 | } |
abfabf8c | 1580 | return op->status; |
074fe897 AA |
1581 | } |
1582 | ||
1583 | /* | |
557ce264 AA |
1584 | * The sequence operation is not cached because we can use the slot and |
1585 | * session values. | |
074fe897 AA |
1586 | */ |
1587 | __be32 | |
bf864a31 AA |
1588 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1589 | struct nfsd4_sequence *seq) | |
074fe897 | 1590 | { |
557ce264 | 1591 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1592 | __be32 status; |
1593 | ||
557ce264 | 1594 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1595 | |
abfabf8c AA |
1596 | /* Either returns 0 or nfserr_retry_uncached */ |
1597 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1598 | if (status == nfserr_retry_uncached_rep) | |
1599 | return status; | |
074fe897 | 1600 | |
557ce264 AA |
1601 | /* The sequence operation has been encoded, cstate->datap set. */ |
1602 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1603 | |
557ce264 AA |
1604 | resp->opcnt = slot->sl_opcnt; |
1605 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1606 | status = slot->sl_status; | |
074fe897 AA |
1607 | |
1608 | return status; | |
1609 | } | |
1610 | ||
0733d213 AA |
1611 | /* |
1612 | * Set the exchange_id flags returned by the server. | |
1613 | */ | |
1614 | static void | |
1615 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1616 | { | |
1617 | /* pNFS is not supported */ | |
1618 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1619 | ||
1620 | /* Referrals are supported, Migration is not. */ | |
1621 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1622 | ||
1623 | /* set the wire flags to return to client. */ | |
1624 | clid->flags = new->cl_exchange_flags; | |
1625 | } | |
1626 | ||
631fc9ea BF |
1627 | static bool client_has_state(struct nfs4_client *clp) |
1628 | { | |
1629 | /* | |
1630 | * Note clp->cl_openowners check isn't quite right: there's no | |
1631 | * need to count owners without stateid's. | |
1632 | * | |
1633 | * Also note we should probably be using this in 4.0 case too. | |
1634 | */ | |
6eccece9 BF |
1635 | return !list_empty(&clp->cl_openowners) |
1636 | || !list_empty(&clp->cl_delegations) | |
1637 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1638 | } |
1639 | ||
069b6ad4 AA |
1640 | __be32 |
1641 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1642 | struct nfsd4_compound_state *cstate, | |
1643 | struct nfsd4_exchange_id *exid) | |
1644 | { | |
0733d213 | 1645 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1646 | __be32 status; |
363168b4 | 1647 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1648 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1649 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1650 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1651 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1652 | |
363168b4 | 1653 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1654 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1655 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1656 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1657 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1658 | |
a084daf5 | 1659 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1660 | return nfserr_inval; |
1661 | ||
0733d213 | 1662 | switch (exid->spa_how) { |
57266a6e BF |
1663 | case SP4_MACH_CRED: |
1664 | if (!svc_rqst_integrity_protected(rqstp)) | |
1665 | return nfserr_inval; | |
0733d213 AA |
1666 | case SP4_NONE: |
1667 | break; | |
063b0fb9 BF |
1668 | default: /* checked by xdr code */ |
1669 | WARN_ON_ONCE(1); | |
0733d213 | 1670 | case SP4_SSV: |
dd30333c | 1671 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
1672 | } |
1673 | ||
2dbb269d | 1674 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1675 | nfs4_lock_state(); |
382a62e7 | 1676 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1677 | if (conf) { |
83e08fd4 BF |
1678 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1679 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1680 | ||
136e658d BF |
1681 | if (update) { |
1682 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1683 | status = nfserr_inval; |
1a308118 BF |
1684 | goto out; |
1685 | } | |
57266a6e BF |
1686 | if (!mach_creds_match(conf, rqstp)) { |
1687 | status = nfserr_wrong_cred; | |
1688 | goto out; | |
1689 | } | |
136e658d | 1690 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1691 | status = nfserr_perm; |
136e658d BF |
1692 | goto out; |
1693 | } | |
1694 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1695 | status = nfserr_not_same; |
1696 | goto out; | |
1697 | } | |
136e658d BF |
1698 | /* case 6 */ |
1699 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1700 | new = conf; | |
1701 | goto out_copy; | |
0733d213 | 1702 | } |
136e658d | 1703 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1704 | if (client_has_state(conf)) { |
1705 | status = nfserr_clid_inuse; | |
0733d213 AA |
1706 | goto out; |
1707 | } | |
1708 | expire_client(conf); | |
1709 | goto out_new; | |
1710 | } | |
136e658d | 1711 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1712 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1713 | new = conf; |
1714 | goto out_copy; | |
1715 | } | |
1716 | /* case 5, client reboot */ | |
136e658d | 1717 | goto out_new; |
6ddbbbfe MS |
1718 | } |
1719 | ||
2dbb269d | 1720 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1721 | status = nfserr_noent; |
1722 | goto out; | |
0733d213 AA |
1723 | } |
1724 | ||
a99454aa | 1725 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1726 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1727 | expire_client(unconf); |
0733d213 | 1728 | |
2dbb269d | 1729 | /* case 1 (normal case) */ |
0733d213 | 1730 | out_new: |
2216d449 | 1731 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1732 | if (new == NULL) { |
4731030d | 1733 | status = nfserr_jukebox; |
0733d213 AA |
1734 | goto out; |
1735 | } | |
4f540e29 | 1736 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 1737 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 1738 | |
c212cecf | 1739 | gen_clid(new, nn); |
ac55fdc4 | 1740 | add_to_unconfirmed(new); |
0733d213 AA |
1741 | out_copy: |
1742 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1743 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1744 | ||
778df3f0 | 1745 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1746 | nfsd4_set_ex_flags(new, exid); |
1747 | ||
1748 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1749 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1750 | status = nfs_ok; |
1751 | ||
1752 | out: | |
1753 | nfs4_unlock_state(); | |
0733d213 | 1754 | return status; |
069b6ad4 AA |
1755 | } |
1756 | ||
57b7b43b | 1757 | static __be32 |
88e588d5 | 1758 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1759 | { |
88e588d5 AA |
1760 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1761 | slot_seqid); | |
b85d4c01 BH |
1762 | |
1763 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1764 | if (slot_inuse) { |
1765 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1766 | return nfserr_jukebox; |
1767 | else | |
1768 | return nfserr_seq_misordered; | |
1769 | } | |
f6d82485 | 1770 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1771 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1772 | return nfs_ok; |
88e588d5 | 1773 | if (seqid == slot_seqid) |
b85d4c01 | 1774 | return nfserr_replay_cache; |
b85d4c01 BH |
1775 | return nfserr_seq_misordered; |
1776 | } | |
1777 | ||
49557cc7 AA |
1778 | /* |
1779 | * Cache the create session result into the create session single DRC | |
1780 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1781 | * Do this for solo or embedded create session operations. | |
1782 | */ | |
1783 | static void | |
1784 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1785 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1786 | { |
1787 | slot->sl_status = nfserr; | |
1788 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1789 | } | |
1790 | ||
1791 | static __be32 | |
1792 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1793 | struct nfsd4_clid_slot *slot) | |
1794 | { | |
1795 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1796 | return slot->sl_status; | |
1797 | } | |
1798 | ||
1b74c25b MJ |
1799 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1800 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1801 | 1 + /* MIN tag is length with zero, only length */ \ | |
1802 | 3 + /* version, opcount, opcode */ \ | |
1803 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1804 | /* seqid, slotID, slotID, cache */ \ | |
1805 | 4 ) * sizeof(__be32)) | |
1806 | ||
1807 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1808 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1809 | 1 + /* status */ \ | |
1810 | 1 + /* MIN tag is length with zero, only length */ \ | |
1811 | 3 + /* opcount, opcode, opstatus*/ \ | |
1812 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1813 | /* seqid, slotID, slotID, slotID, status */ \ | |
1814 | 5 ) * sizeof(__be32)) | |
1815 | ||
55c760cf | 1816 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 1817 | { |
55c760cf BF |
1818 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
1819 | ||
373cd409 BF |
1820 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
1821 | return nfserr_toosmall; | |
1822 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
1823 | return nfserr_toosmall; | |
55c760cf BF |
1824 | ca->headerpadsz = 0; |
1825 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
1826 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
1827 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
1828 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
1829 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
1830 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
1831 | /* | |
1832 | * Note decreasing slot size below client's request may make it | |
1833 | * difficult for client to function correctly, whereas | |
1834 | * decreasing the number of slots will (just?) affect | |
1835 | * performance. When short on memory we therefore prefer to | |
1836 | * decrease number of slots instead of their size. Clients that | |
1837 | * request larger slots than they need will get poor results: | |
1838 | */ | |
1839 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
1840 | if (!ca->maxreqs) | |
1841 | return nfserr_jukebox; | |
1842 | ||
373cd409 | 1843 | return nfs_ok; |
1b74c25b MJ |
1844 | } |
1845 | ||
06b332a5 | 1846 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 1847 | { |
06b332a5 BF |
1848 | ca->headerpadsz = 0; |
1849 | ||
1850 | /* | |
1851 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
1852 | * don't even do gss on the backchannel yet. But this is still | |
1853 | * less than 1k. Tighten up this estimate in the unlikely event | |
1854 | * it turns out to be a problem for some client: | |
1855 | */ | |
1856 | if (ca->maxreq_sz < NFS4_enc_cb_recall_sz + RPC_MAX_HEADER_WITH_AUTH) | |
1857 | return nfserr_toosmall; | |
1858 | if (ca->maxresp_sz < NFS4_dec_cb_recall_sz + RPC_MAX_REPHEADER_WITH_AUTH) | |
1859 | return nfserr_toosmall; | |
1860 | ca->maxresp_cached = 0; | |
1861 | if (ca->maxops < 2) | |
1862 | return nfserr_toosmall; | |
1863 | ||
1864 | return nfs_ok; | |
1b74c25b MJ |
1865 | } |
1866 | ||
b78724b7 BF |
1867 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
1868 | { | |
1869 | switch (cbs->flavor) { | |
1870 | case RPC_AUTH_NULL: | |
1871 | case RPC_AUTH_UNIX: | |
1872 | return nfs_ok; | |
1873 | default: | |
1874 | /* | |
1875 | * GSS case: the spec doesn't allow us to return this | |
1876 | * error. But it also doesn't allow us not to support | |
1877 | * GSS. | |
1878 | * I'd rather this fail hard than return some error the | |
1879 | * client might think it can already handle: | |
1880 | */ | |
1881 | return nfserr_encr_alg_unsupp; | |
1882 | } | |
1883 | } | |
1884 | ||
069b6ad4 AA |
1885 | __be32 |
1886 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1887 | struct nfsd4_compound_state *cstate, | |
1888 | struct nfsd4_create_session *cr_ses) | |
1889 | { | |
363168b4 | 1890 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1891 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1892 | struct nfsd4_session *new; |
81f0b2a4 | 1893 | struct nfsd4_conn *conn; |
49557cc7 | 1894 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1895 | __be32 status = 0; |
8daae4dc | 1896 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 1897 | |
a62573dc MJ |
1898 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1899 | return nfserr_inval; | |
b78724b7 BF |
1900 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
1901 | if (status) | |
1902 | return status; | |
55c760cf | 1903 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
1904 | if (status) |
1905 | return status; | |
1906 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 BF |
1907 | if (status) |
1908 | return status; | |
81f0b2a4 | 1909 | status = nfserr_jukebox; |
55c760cf BF |
1910 | new = alloc_session(&cr_ses->fore_channel); |
1911 | if (!new) | |
1912 | goto out_release_drc_mem; | |
81f0b2a4 BF |
1913 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
1914 | if (!conn) | |
1915 | goto out_free_session; | |
a62573dc | 1916 | |
ec6b5d7b | 1917 | nfs4_lock_state(); |
0a7ec377 | 1918 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 1919 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 1920 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
1921 | |
1922 | if (conf) { | |
57266a6e BF |
1923 | status = nfserr_wrong_cred; |
1924 | if (!mach_creds_match(conf, rqstp)) | |
1925 | goto out_free_conn; | |
49557cc7 AA |
1926 | cs_slot = &conf->cl_cs_slot; |
1927 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1928 | if (status == nfserr_replay_cache) { |
49557cc7 | 1929 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1930 | goto out_free_conn; |
49557cc7 | 1931 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1932 | status = nfserr_seq_misordered; |
81f0b2a4 | 1933 | goto out_free_conn; |
ec6b5d7b | 1934 | } |
ec6b5d7b | 1935 | } else if (unconf) { |
8f9d3d3b | 1936 | struct nfs4_client *old; |
ec6b5d7b | 1937 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1938 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1939 | status = nfserr_clid_inuse; |
81f0b2a4 | 1940 | goto out_free_conn; |
ec6b5d7b | 1941 | } |
57266a6e BF |
1942 | status = nfserr_wrong_cred; |
1943 | if (!mach_creds_match(unconf, rqstp)) | |
1944 | goto out_free_conn; | |
49557cc7 AA |
1945 | cs_slot = &unconf->cl_cs_slot; |
1946 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1947 | if (status) { |
1948 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1949 | status = nfserr_seq_misordered; |
81f0b2a4 | 1950 | goto out_free_conn; |
ec6b5d7b | 1951 | } |
382a62e7 | 1952 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
1953 | if (old) { |
1954 | status = mark_client_expired(old); | |
1955 | if (status) | |
1956 | goto out_free_conn; | |
8f9d3d3b | 1957 | expire_client(old); |
221a6876 | 1958 | } |
8f9d3d3b | 1959 | move_to_confirmed(unconf); |
ec6b5d7b AA |
1960 | conf = unconf; |
1961 | } else { | |
1962 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1963 | goto out_free_conn; |
ec6b5d7b | 1964 | } |
81f0b2a4 | 1965 | status = nfs_ok; |
408b79bc BF |
1966 | /* |
1967 | * We do not support RDMA or persistent sessions | |
1968 | */ | |
1969 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1970 | cr_ses->flags &= ~SESSION4_RDMA; | |
1971 | ||
81f0b2a4 BF |
1972 | init_session(rqstp, new, conf, cr_ses); |
1973 | nfsd4_init_conn(rqstp, conn, new); | |
1974 | ||
ac7c46f2 | 1975 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1976 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 1977 | cs_slot->sl_seqid++; |
49557cc7 | 1978 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1979 | |
49557cc7 AA |
1980 | /* cache solo and embedded create sessions under the state lock */ |
1981 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 1982 | nfs4_unlock_state(); |
ec6b5d7b | 1983 | return status; |
81f0b2a4 | 1984 | out_free_conn: |
266533c6 | 1985 | nfs4_unlock_state(); |
81f0b2a4 BF |
1986 | free_conn(conn); |
1987 | out_free_session: | |
1988 | __free_session(new); | |
55c760cf BF |
1989 | out_release_drc_mem: |
1990 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 1991 | return status; |
069b6ad4 AA |
1992 | } |
1993 | ||
1d1bc8f2 BF |
1994 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1995 | { | |
1996 | switch (*dir) { | |
1997 | case NFS4_CDFC4_FORE: | |
1998 | case NFS4_CDFC4_BACK: | |
1999 | return nfs_ok; | |
2000 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2001 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2002 | *dir = NFS4_CDFC4_BOTH; | |
2003 | return nfs_ok; | |
2004 | }; | |
2005 | return nfserr_inval; | |
2006 | } | |
2007 | ||
cb73a9f4 BF |
2008 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2009 | { | |
2010 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2011 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2012 | __be32 status; |
cb73a9f4 | 2013 | |
b78724b7 BF |
2014 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2015 | if (status) | |
2016 | return status; | |
c9a49628 | 2017 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2018 | session->se_cb_prog = bc->bc_cb_program; |
2019 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2020 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2021 | |
2022 | nfsd4_probe_callback(session->se_client); | |
2023 | ||
2024 | return nfs_ok; | |
2025 | } | |
2026 | ||
1d1bc8f2 BF |
2027 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2028 | struct nfsd4_compound_state *cstate, | |
2029 | struct nfsd4_bind_conn_to_session *bcts) | |
2030 | { | |
2031 | __be32 status; | |
3ba63671 | 2032 | struct nfsd4_conn *conn; |
4f6e6c17 | 2033 | struct nfsd4_session *session; |
c9a49628 | 2034 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1d1bc8f2 BF |
2035 | |
2036 | if (!nfsd4_last_compound_op(rqstp)) | |
2037 | return nfserr_not_only_op; | |
4f6e6c17 | 2038 | nfs4_lock_state(); |
c9a49628 | 2039 | spin_lock(&nn->client_lock); |
4f6e6c17 | 2040 | session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
c9a49628 | 2041 | spin_unlock(&nn->client_lock); |
4f6e6c17 BF |
2042 | status = nfserr_badsession; |
2043 | if (!session) | |
2044 | goto out; | |
57266a6e BF |
2045 | status = nfserr_wrong_cred; |
2046 | if (!mach_creds_match(session->se_client, rqstp)) | |
2047 | goto out; | |
1d1bc8f2 | 2048 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2049 | if (status) |
4f6e6c17 | 2050 | goto out; |
3ba63671 | 2051 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2052 | status = nfserr_jukebox; |
3ba63671 | 2053 | if (!conn) |
4f6e6c17 BF |
2054 | goto out; |
2055 | nfsd4_init_conn(rqstp, conn, session); | |
2056 | status = nfs_ok; | |
2057 | out: | |
2058 | nfs4_unlock_state(); | |
2059 | return status; | |
1d1bc8f2 BF |
2060 | } |
2061 | ||
5d4cec2f BF |
2062 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2063 | { | |
2064 | if (!session) | |
2065 | return 0; | |
2066 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2067 | } | |
2068 | ||
069b6ad4 AA |
2069 | __be32 |
2070 | nfsd4_destroy_session(struct svc_rqst *r, | |
2071 | struct nfsd4_compound_state *cstate, | |
2072 | struct nfsd4_destroy_session *sessionid) | |
2073 | { | |
e10e0cfc | 2074 | struct nfsd4_session *ses; |
abcdff09 | 2075 | __be32 status; |
f0f51f5c | 2076 | int ref_held_by_me = 0; |
c9a49628 | 2077 | struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); |
e10e0cfc | 2078 | |
abcdff09 BF |
2079 | nfs4_lock_state(); |
2080 | status = nfserr_not_only_op; | |
5d4cec2f | 2081 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2082 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2083 | goto out; |
f0f51f5c | 2084 | ref_held_by_me++; |
57716355 | 2085 | } |
e10e0cfc | 2086 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2087 | spin_lock(&nn->client_lock); |
1872de0e | 2088 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
abcdff09 BF |
2089 | status = nfserr_badsession; |
2090 | if (!ses) | |
2091 | goto out_client_lock; | |
57266a6e BF |
2092 | status = nfserr_wrong_cred; |
2093 | if (!mach_creds_match(ses->se_client, r)) | |
66b2b9b2 | 2094 | goto out_client_lock; |
f0f51f5c BF |
2095 | nfsd4_get_session_locked(ses); |
2096 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); | |
66b2b9b2 | 2097 | if (status) |
f0f51f5c | 2098 | goto out_put_session; |
e10e0cfc | 2099 | unhash_session(ses); |
c9a49628 | 2100 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2101 | |
84f5f7cc | 2102 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2103 | |
c9a49628 | 2104 | spin_lock(&nn->client_lock); |
e10e0cfc | 2105 | status = nfs_ok; |
f0f51f5c BF |
2106 | out_put_session: |
2107 | nfsd4_put_session(ses); | |
abcdff09 BF |
2108 | out_client_lock: |
2109 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2110 | out: |
abcdff09 | 2111 | nfs4_unlock_state(); |
e10e0cfc | 2112 | return status; |
069b6ad4 AA |
2113 | } |
2114 | ||
a663bdd8 | 2115 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2116 | { |
2117 | struct nfsd4_conn *c; | |
2118 | ||
2119 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2120 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2121 | return c; |
2122 | } | |
2123 | } | |
2124 | return NULL; | |
2125 | } | |
2126 | ||
57266a6e | 2127 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2128 | { |
2129 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2130 | struct nfsd4_conn *c; |
57266a6e | 2131 | __be32 status = nfs_ok; |
21b75b01 | 2132 | int ret; |
328ead28 BF |
2133 | |
2134 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2135 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2136 | if (c) |
2137 | goto out_free; | |
2138 | status = nfserr_conn_not_bound_to_session; | |
2139 | if (clp->cl_mach_cred) | |
2140 | goto out_free; | |
328ead28 BF |
2141 | __nfsd4_hash_conn(new, ses); |
2142 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2143 | ret = nfsd4_register_conn(new); |
2144 | if (ret) | |
2145 | /* oops; xprt is already down: */ | |
2146 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2147 | return nfs_ok; |
2148 | out_free: | |
2149 | spin_unlock(&clp->cl_lock); | |
2150 | free_conn(new); | |
2151 | return status; | |
328ead28 BF |
2152 | } |
2153 | ||
868b89c3 MJ |
2154 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2155 | { | |
2156 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2157 | ||
2158 | return args->opcnt > session->se_fchannel.maxops; | |
2159 | } | |
2160 | ||
ae82a8d0 MJ |
2161 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2162 | struct nfsd4_session *session) | |
2163 | { | |
2164 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2165 | ||
2166 | return xb->len > session->se_fchannel.maxreq_sz; | |
2167 | } | |
2168 | ||
069b6ad4 | 2169 | __be32 |
b85d4c01 | 2170 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2171 | struct nfsd4_compound_state *cstate, |
2172 | struct nfsd4_sequence *seq) | |
2173 | { | |
f9bb94c4 | 2174 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 | 2175 | struct nfsd4_session *session; |
221a6876 | 2176 | struct nfs4_client *clp; |
b85d4c01 | 2177 | struct nfsd4_slot *slot; |
a663bdd8 | 2178 | struct nfsd4_conn *conn; |
57b7b43b | 2179 | __be32 status; |
c9a49628 | 2180 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b85d4c01 | 2181 | |
f9bb94c4 AA |
2182 | if (resp->opcnt != 1) |
2183 | return nfserr_sequence_pos; | |
2184 | ||
a663bdd8 BF |
2185 | /* |
2186 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2187 | * below. | |
2188 | */ | |
2189 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2190 | if (!conn) | |
2191 | return nfserr_jukebox; | |
2192 | ||
c9a49628 | 2193 | spin_lock(&nn->client_lock); |
b85d4c01 | 2194 | status = nfserr_badsession; |
1872de0e | 2195 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
b85d4c01 | 2196 | if (!session) |
221a6876 BF |
2197 | goto out_no_session; |
2198 | clp = session->se_client; | |
2199 | status = get_client_locked(clp); | |
2200 | if (status) | |
2201 | goto out_no_session; | |
66b2b9b2 BF |
2202 | status = nfsd4_get_session_locked(session); |
2203 | if (status) | |
2204 | goto out_put_client; | |
b85d4c01 | 2205 | |
868b89c3 MJ |
2206 | status = nfserr_too_many_ops; |
2207 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2208 | goto out_put_session; |
868b89c3 | 2209 | |
ae82a8d0 MJ |
2210 | status = nfserr_req_too_big; |
2211 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2212 | goto out_put_session; |
ae82a8d0 | 2213 | |
b85d4c01 | 2214 | status = nfserr_badslot; |
6c18ba9f | 2215 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2216 | goto out_put_session; |
b85d4c01 | 2217 | |
557ce264 | 2218 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2219 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2220 | ||
a8dfdaeb AA |
2221 | /* We do not negotiate the number of slots yet, so set the |
2222 | * maxslots to the session maxreqs which is used to encode | |
2223 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2224 | seq->maxslots = session->se_fchannel.maxreqs; | |
2225 | ||
73e79482 BF |
2226 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2227 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2228 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2229 | status = nfserr_seq_misordered; |
2230 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2231 | goto out_put_session; |
b85d4c01 BH |
2232 | cstate->slot = slot; |
2233 | cstate->session = session; | |
da3846a2 | 2234 | /* Return the cached reply status and set cstate->status |
557ce264 | 2235 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2236 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2237 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2238 | goto out; |
b85d4c01 BH |
2239 | } |
2240 | if (status) | |
66b2b9b2 | 2241 | goto out_put_session; |
b85d4c01 | 2242 | |
57266a6e | 2243 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2244 | conn = NULL; |
57266a6e BF |
2245 | if (status) |
2246 | goto out_put_session; | |
328ead28 | 2247 | |
b85d4c01 | 2248 | /* Success! bump slot seqid */ |
b85d4c01 | 2249 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2250 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2251 | if (seq->cachethis) |
2252 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2253 | else |
2254 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2255 | |
2256 | cstate->slot = slot; | |
2257 | cstate->session = session; | |
2258 | ||
b85d4c01 | 2259 | out: |
221a6876 BF |
2260 | switch (clp->cl_cb_state) { |
2261 | case NFSD4_CB_DOWN: | |
2262 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2263 | break; | |
2264 | case NFSD4_CB_FAULT: | |
2265 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2266 | break; | |
2267 | default: | |
2268 | seq->status_flags = 0; | |
aaf84eb9 | 2269 | } |
3bd64a5b BF |
2270 | if (!list_empty(&clp->cl_revoked)) |
2271 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2272 | out_no_session: |
a663bdd8 | 2273 | kfree(conn); |
c9a49628 | 2274 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2275 | return status; |
66b2b9b2 BF |
2276 | out_put_session: |
2277 | nfsd4_put_session(session); | |
221a6876 BF |
2278 | out_put_client: |
2279 | put_client_renew_locked(clp); | |
2280 | goto out_no_session; | |
069b6ad4 AA |
2281 | } |
2282 | ||
345c2842 MJ |
2283 | __be32 |
2284 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2285 | { | |
2286 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2287 | __be32 status = 0; |
8daae4dc | 2288 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2289 | |
2290 | nfs4_lock_state(); | |
0a7ec377 | 2291 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2292 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2293 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2294 | |
2295 | if (conf) { | |
2296 | clp = conf; | |
2297 | ||
c0293b01 | 2298 | if (client_has_state(conf)) { |
345c2842 MJ |
2299 | status = nfserr_clientid_busy; |
2300 | goto out; | |
2301 | } | |
2302 | } else if (unconf) | |
2303 | clp = unconf; | |
2304 | else { | |
2305 | status = nfserr_stale_clientid; | |
2306 | goto out; | |
2307 | } | |
57266a6e BF |
2308 | if (!mach_creds_match(clp, rqstp)) { |
2309 | status = nfserr_wrong_cred; | |
2310 | goto out; | |
2311 | } | |
345c2842 MJ |
2312 | expire_client(clp); |
2313 | out: | |
2314 | nfs4_unlock_state(); | |
345c2842 MJ |
2315 | return status; |
2316 | } | |
2317 | ||
4dc6ec00 BF |
2318 | __be32 |
2319 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2320 | { | |
57b7b43b | 2321 | __be32 status = 0; |
bcecf1cc | 2322 | |
4dc6ec00 BF |
2323 | if (rc->rca_one_fs) { |
2324 | if (!cstate->current_fh.fh_dentry) | |
2325 | return nfserr_nofilehandle; | |
2326 | /* | |
2327 | * We don't take advantage of the rca_one_fs case. | |
2328 | * That's OK, it's optional, we can safely ignore it. | |
2329 | */ | |
2330 | return nfs_ok; | |
2331 | } | |
bcecf1cc | 2332 | |
4dc6ec00 | 2333 | nfs4_lock_state(); |
bcecf1cc | 2334 | status = nfserr_complete_already; |
a52d726b JL |
2335 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2336 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2337 | goto out; |
2338 | ||
2339 | status = nfserr_stale_clientid; | |
2340 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2341 | /* |
2342 | * The following error isn't really legal. | |
2343 | * But we only get here if the client just explicitly | |
2344 | * destroyed the client. Surely it no longer cares what | |
2345 | * error it gets back on an operation for the dead | |
2346 | * client. | |
2347 | */ | |
bcecf1cc MJ |
2348 | goto out; |
2349 | ||
2350 | status = nfs_ok; | |
2a4317c5 | 2351 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2352 | out: |
4dc6ec00 | 2353 | nfs4_unlock_state(); |
bcecf1cc | 2354 | return status; |
4dc6ec00 BF |
2355 | } |
2356 | ||
b37ad28b | 2357 | __be32 |
b591480b BF |
2358 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2359 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2360 | { |
a084daf5 | 2361 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2362 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2363 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2364 | __be32 status; |
c212cecf SK |
2365 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2366 | ||
63db4632 | 2367 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2368 | nfs4_lock_state(); |
382a62e7 | 2369 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2370 | if (conf) { |
63db4632 | 2371 | /* case 0: */ |
1da177e4 | 2372 | status = nfserr_clid_inuse; |
e203d506 BF |
2373 | if (clp_used_exchangeid(conf)) |
2374 | goto out; | |
026722c2 | 2375 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2376 | char addr_str[INET6_ADDRSTRLEN]; |
2377 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2378 | sizeof(addr_str)); | |
2379 | dprintk("NFSD: setclientid: string in use by client " | |
2380 | "at %s\n", addr_str); | |
1da177e4 LT |
2381 | goto out; |
2382 | } | |
1da177e4 | 2383 | } |
a99454aa | 2384 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2385 | if (unconf) |
2386 | expire_client(unconf); | |
3e772463 | 2387 | status = nfserr_jukebox; |
2216d449 | 2388 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2389 | if (new == NULL) |
2390 | goto out; | |
34b232bb | 2391 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2392 | /* case 1: probable callback update */ |
1da177e4 | 2393 | copy_clid(new, conf); |
34b232bb | 2394 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2395 | gen_clid(new, nn); |
8323c3b2 | 2396 | new->cl_minorversion = 0; |
6f3d772f | 2397 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2398 | add_to_unconfirmed(new); |
1da177e4 LT |
2399 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2400 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2401 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2402 | status = nfs_ok; | |
2403 | out: | |
2404 | nfs4_unlock_state(); | |
2405 | return status; | |
2406 | } | |
2407 | ||
2408 | ||
b37ad28b | 2409 | __be32 |
b591480b BF |
2410 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2411 | struct nfsd4_compound_state *cstate, | |
2412 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2413 | { |
21ab45a4 | 2414 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2415 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2416 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2417 | __be32 status; |
7f2210fa | 2418 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2419 | |
2c142baa | 2420 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2421 | return nfserr_stale_clientid; |
1da177e4 | 2422 | nfs4_lock_state(); |
21ab45a4 | 2423 | |
8daae4dc | 2424 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2425 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2426 | /* |
8695b90a BF |
2427 | * We try hard to give out unique clientid's, so if we get an |
2428 | * attempt to confirm the same clientid with a different cred, | |
2429 | * there's a bug somewhere. Let's charitably assume it's our | |
2430 | * bug. | |
a186e767 | 2431 | */ |
8695b90a BF |
2432 | status = nfserr_serverfault; |
2433 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2434 | goto out; | |
2435 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2436 | goto out; | |
63db4632 | 2437 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2438 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2439 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2440 | status = nfs_ok; |
90d700b7 BF |
2441 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2442 | status = nfserr_stale_clientid; | |
2443 | goto out; | |
2444 | } | |
2445 | status = nfs_ok; | |
2446 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2447 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2448 | nfsd4_probe_callback(conf); | |
2449 | expire_client(unconf); | |
90d700b7 | 2450 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2451 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2452 | if (conf) { |
2453 | status = mark_client_expired(conf); | |
2454 | if (status) | |
2455 | goto out; | |
8695b90a | 2456 | expire_client(conf); |
221a6876 | 2457 | } |
8695b90a | 2458 | move_to_confirmed(unconf); |
f3d03b92 | 2459 | nfsd4_probe_callback(unconf); |
08e8987c | 2460 | } |
1da177e4 | 2461 | out: |
1da177e4 LT |
2462 | nfs4_unlock_state(); |
2463 | return status; | |
2464 | } | |
2465 | ||
32513b40 BF |
2466 | static struct nfs4_file *nfsd4_alloc_file(void) |
2467 | { | |
2468 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2469 | } | |
2470 | ||
1da177e4 | 2471 | /* OPEN Share state helper functions */ |
32513b40 | 2472 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2473 | { |
1da177e4 LT |
2474 | unsigned int hashval = file_hashval(ino); |
2475 | ||
32513b40 | 2476 | atomic_set(&fp->fi_ref, 1); |
32513b40 BF |
2477 | INIT_LIST_HEAD(&fp->fi_stateids); |
2478 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2479 | fp->fi_inode = igrab(ino); | |
2480 | fp->fi_had_conflict = false; | |
2481 | fp->fi_lease = NULL; | |
2482 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2483 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2484 | spin_lock(&recall_lock); | |
89876f8c | 2485 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
32513b40 | 2486 | spin_unlock(&recall_lock); |
1da177e4 LT |
2487 | } |
2488 | ||
e60d4398 | 2489 | static void |
e18b890b | 2490 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2491 | { |
e60d4398 N |
2492 | if (*slab == NULL) |
2493 | return; | |
1a1d92c1 | 2494 | kmem_cache_destroy(*slab); |
e60d4398 | 2495 | *slab = NULL; |
1da177e4 LT |
2496 | } |
2497 | ||
e8ff2a84 | 2498 | void |
1da177e4 LT |
2499 | nfsd4_free_slabs(void) |
2500 | { | |
fe0750e5 BF |
2501 | nfsd4_free_slab(&openowner_slab); |
2502 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2503 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2504 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2505 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2506 | } |
1da177e4 | 2507 | |
72083396 | 2508 | int |
e60d4398 N |
2509 | nfsd4_init_slabs(void) |
2510 | { | |
fe0750e5 BF |
2511 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2512 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2513 | if (openowner_slab == NULL) | |
2514 | goto out_nomem; | |
2515 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2516 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2517 | if (lockowner_slab == NULL) |
e60d4398 N |
2518 | goto out_nomem; |
2519 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2520 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2521 | if (file_slab == NULL) |
2522 | goto out_nomem; | |
5ac049ac | 2523 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2524 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2525 | if (stateid_slab == NULL) |
2526 | goto out_nomem; | |
5b2d21c1 | 2527 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2528 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2529 | if (deleg_slab == NULL) |
2530 | goto out_nomem; | |
e60d4398 N |
2531 | return 0; |
2532 | out_nomem: | |
2533 | nfsd4_free_slabs(); | |
2534 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2535 | return -ENOMEM; | |
1da177e4 LT |
2536 | } |
2537 | ||
fe0750e5 BF |
2538 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2539 | { | |
2540 | kfree(oo->oo_owner.so_owner.data); | |
2541 | kmem_cache_free(openowner_slab, oo); | |
2542 | } | |
2543 | ||
2544 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2545 | { |
fe0750e5 BF |
2546 | kfree(lo->lo_owner.so_owner.data); |
2547 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2548 | } |
2549 | ||
ff194bd9 | 2550 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2551 | { |
ff194bd9 BF |
2552 | rp->rp_status = nfserr_serverfault; |
2553 | rp->rp_buflen = 0; | |
2554 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2555 | } |
2556 | ||
fe0750e5 | 2557 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2558 | { |
1da177e4 | 2559 | struct nfs4_stateowner *sop; |
1da177e4 | 2560 | |
fe0750e5 | 2561 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2562 | if (!sop) |
2563 | return NULL; | |
2564 | ||
2565 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2566 | if (!sop->so_owner.data) { | |
fe0750e5 | 2567 | kmem_cache_free(slab, sop); |
1da177e4 | 2568 | return NULL; |
ff194bd9 BF |
2569 | } |
2570 | sop->so_owner.len = owner->len; | |
2571 | ||
ea1da636 | 2572 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2573 | sop->so_client = clp; |
2574 | init_nfs4_replay(&sop->so_replay); | |
2575 | return sop; | |
2576 | } | |
2577 | ||
fe0750e5 | 2578 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2579 | { |
9b531137 SK |
2580 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2581 | ||
2582 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2583 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2584 | } |
2585 | ||
fe0750e5 | 2586 | static struct nfs4_openowner * |
ff194bd9 | 2587 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2588 | struct nfs4_openowner *oo; |
ff194bd9 | 2589 | |
fe0750e5 BF |
2590 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2591 | if (!oo) | |
ff194bd9 | 2592 | return NULL; |
fe0750e5 BF |
2593 | oo->oo_owner.so_is_open_owner = 1; |
2594 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2595 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2596 | oo->oo_time = 0; |
38c387b5 | 2597 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2598 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2599 | hash_openowner(oo, clp, strhashval); | |
2600 | return oo; | |
1da177e4 LT |
2601 | } |
2602 | ||
996e0938 | 2603 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2604 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2605 | |
3abdb607 | 2606 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
ea1da636 | 2607 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2608 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2609 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2610 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2611 | get_nfs4_file(fp); |
1da177e4 | 2612 | stp->st_file = fp; |
1da177e4 LT |
2613 | stp->st_access_bmap = 0; |
2614 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2615 | set_access(open->op_share_access, stp); |
ce0fc43c | 2616 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2617 | stp->st_openstp = NULL; |
1da177e4 LT |
2618 | } |
2619 | ||
fd39ca9a | 2620 | static void |
73758fed | 2621 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2622 | { |
73758fed SK |
2623 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2624 | ||
fe0750e5 | 2625 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2626 | |
73758fed | 2627 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2628 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2629 | } |
2630 | ||
1da177e4 | 2631 | static int |
599e0a22 BF |
2632 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2633 | clientid_t *clid) | |
2634 | { | |
2635 | return (sop->so_owner.len == owner->len) && | |
2636 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2637 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2638 | } |
2639 | ||
fe0750e5 | 2640 | static struct nfs4_openowner * |
9b531137 SK |
2641 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2642 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2643 | { |
a50d2ad1 BF |
2644 | struct nfs4_stateowner *so; |
2645 | struct nfs4_openowner *oo; | |
d15c077e | 2646 | struct nfs4_client *clp; |
1da177e4 | 2647 | |
9b531137 | 2648 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2649 | if (!so->so_is_open_owner) |
2650 | continue; | |
a50d2ad1 BF |
2651 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2652 | oo = openowner(so); | |
d15c077e BF |
2653 | clp = oo->oo_owner.so_client; |
2654 | if ((bool)clp->cl_minorversion != sessions) | |
2655 | return NULL; | |
a50d2ad1 BF |
2656 | renew_client(oo->oo_owner.so_client); |
2657 | return oo; | |
2658 | } | |
1da177e4 LT |
2659 | } |
2660 | return NULL; | |
2661 | } | |
2662 | ||
2663 | /* search file_hashtbl[] for file */ | |
2664 | static struct nfs4_file * | |
2665 | find_file(struct inode *ino) | |
2666 | { | |
2667 | unsigned int hashval = file_hashval(ino); | |
2668 | struct nfs4_file *fp; | |
2669 | ||
8b671b80 | 2670 | spin_lock(&recall_lock); |
89876f8c | 2671 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2672 | if (fp->fi_inode == ino) { |
2673 | get_nfs4_file(fp); | |
8b671b80 | 2674 | spin_unlock(&recall_lock); |
1da177e4 | 2675 | return fp; |
13cd2184 | 2676 | } |
1da177e4 | 2677 | } |
8b671b80 | 2678 | spin_unlock(&recall_lock); |
1da177e4 LT |
2679 | return NULL; |
2680 | } | |
2681 | ||
1da177e4 LT |
2682 | /* |
2683 | * Called to check deny when READ with all zero stateid or | |
2684 | * WRITE with all zero or all one stateid | |
2685 | */ | |
b37ad28b | 2686 | static __be32 |
1da177e4 LT |
2687 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2688 | { | |
2689 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2690 | struct nfs4_file *fp; | |
dcef0413 | 2691 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2692 | __be32 ret; |
1da177e4 | 2693 | |
1da177e4 | 2694 | fp = find_file(ino); |
13cd2184 N |
2695 | if (!fp) |
2696 | return nfs_ok; | |
b700949b | 2697 | ret = nfserr_locked; |
1da177e4 | 2698 | /* Search for conflicting share reservations */ |
13cd2184 | 2699 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2700 | if (test_deny(deny_type, stp) || |
2701 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2702 | goto out; |
1da177e4 | 2703 | } |
13cd2184 N |
2704 | ret = nfs_ok; |
2705 | out: | |
2706 | put_nfs4_file(fp); | |
2707 | return ret; | |
1da177e4 LT |
2708 | } |
2709 | ||
6b57d9c8 | 2710 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2711 | { |
e8c69d17 BF |
2712 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
2713 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2714 | ||
1da177e4 LT |
2715 | /* We're assuming the state code never drops its reference |
2716 | * without first removing the lease. Since we're in this lease | |
2717 | * callback (and since the lease code is serialized by the kernel | |
2718 | * lock) we know the server hasn't removed the lease yet, we know | |
2719 | * it's safe to take a reference: */ | |
2720 | atomic_inc(&dp->dl_count); | |
2721 | ||
e8c69d17 | 2722 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
1da177e4 | 2723 | |
1c8c601a | 2724 | /* Only place dl_time is set; protected by i_lock: */ |
1da177e4 LT |
2725 | dp->dl_time = get_seconds(); |
2726 | ||
6b57d9c8 BF |
2727 | nfsd4_cb_recall(dp); |
2728 | } | |
2729 | ||
1c8c601a | 2730 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
2731 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2732 | { | |
acfdf5c3 BF |
2733 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2734 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2735 | |
7fa10cd1 BF |
2736 | if (!fp) { |
2737 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2738 | return; | |
2739 | } | |
2740 | if (fp->fi_had_conflict) { | |
2741 | WARN(1, "duplicate break on %p\n", fp); | |
2742 | return; | |
2743 | } | |
0272e1fd BF |
2744 | /* |
2745 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2746 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2747 | * in time: |
0272e1fd BF |
2748 | */ |
2749 | fl->fl_break_time = 0; | |
1da177e4 | 2750 | |
5d926e8c | 2751 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2752 | fp->fi_had_conflict = true; |
2753 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2754 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2755 | spin_unlock(&recall_lock); |
1da177e4 LT |
2756 | } |
2757 | ||
1da177e4 LT |
2758 | static |
2759 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2760 | { | |
2761 | if (arg & F_UNLCK) | |
2762 | return lease_modify(onlist, arg); | |
2763 | else | |
2764 | return -EAGAIN; | |
2765 | } | |
2766 | ||
7b021967 | 2767 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2768 | .lm_break = nfsd_break_deleg_cb, |
2769 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2770 | }; |
2771 | ||
7a8711c9 BF |
2772 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2773 | { | |
2774 | if (nfsd4_has_session(cstate)) | |
2775 | return nfs_ok; | |
2776 | if (seqid == so->so_seqid - 1) | |
2777 | return nfserr_replay_me; | |
2778 | if (seqid == so->so_seqid) | |
2779 | return nfs_ok; | |
2780 | return nfserr_bad_seqid; | |
2781 | } | |
1da177e4 | 2782 | |
b37ad28b | 2783 | __be32 |
6668958f | 2784 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 2785 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 2786 | { |
1da177e4 LT |
2787 | clientid_t *clientid = &open->op_clientid; |
2788 | struct nfs4_client *clp = NULL; | |
2789 | unsigned int strhashval; | |
fe0750e5 | 2790 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2791 | __be32 status; |
1da177e4 | 2792 | |
2c142baa | 2793 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2794 | return nfserr_stale_clientid; |
32513b40 BF |
2795 | /* |
2796 | * In case we need it later, after we've already created the | |
2797 | * file and don't want to risk a further failure: | |
2798 | */ | |
2799 | open->op_file = nfsd4_alloc_file(); | |
2800 | if (open->op_file == NULL) | |
2801 | return nfserr_jukebox; | |
1da177e4 | 2802 | |
16bfdaaf | 2803 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 2804 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
2805 | open->op_openowner = oo; |
2806 | if (!oo) { | |
8daae4dc SK |
2807 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2808 | nn); | |
1da177e4 | 2809 | if (clp == NULL) |
0f442aa2 | 2810 | return nfserr_expired; |
bcf130f9 | 2811 | goto new_owner; |
1da177e4 | 2812 | } |
dad1c067 | 2813 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2814 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2815 | clp = oo->oo_owner.so_client; |
2816 | release_openowner(oo); | |
2817 | open->op_openowner = NULL; | |
bcf130f9 | 2818 | goto new_owner; |
0f442aa2 | 2819 | } |
4cdc951b BF |
2820 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2821 | if (status) | |
2822 | return status; | |
2823 | clp = oo->oo_owner.so_client; | |
2824 | goto alloc_stateid; | |
bcf130f9 BF |
2825 | new_owner: |
2826 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2827 | if (oo == NULL) | |
2828 | return nfserr_jukebox; | |
2829 | open->op_openowner = oo; | |
4cdc951b BF |
2830 | alloc_stateid: |
2831 | open->op_stp = nfs4_alloc_stateid(clp); | |
2832 | if (!open->op_stp) | |
2833 | return nfserr_jukebox; | |
0f442aa2 | 2834 | return nfs_ok; |
1da177e4 LT |
2835 | } |
2836 | ||
b37ad28b | 2837 | static inline __be32 |
4a6e43e6 N |
2838 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2839 | { | |
2840 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2841 | return nfserr_openmode; | |
2842 | else | |
2843 | return nfs_ok; | |
2844 | } | |
2845 | ||
f459e453 | 2846 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2847 | { |
f459e453 | 2848 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2849 | } |
2850 | ||
38c2f4b1 | 2851 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2852 | { |
f459e453 | 2853 | struct nfs4_stid *ret; |
24a0111e | 2854 | |
38c2f4b1 | 2855 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2856 | if (!ret) |
2857 | return NULL; | |
2858 | return delegstateid(ret); | |
24a0111e BF |
2859 | } |
2860 | ||
8b289b2c BF |
2861 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2862 | { | |
2863 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2864 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2865 | } | |
2866 | ||
b37ad28b | 2867 | static __be32 |
41d22663 | 2868 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
2869 | struct nfs4_delegation **dp) |
2870 | { | |
2871 | int flags; | |
b37ad28b | 2872 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2873 | |
38c2f4b1 | 2874 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2875 | if (*dp == NULL) |
c44c5eeb | 2876 | goto out; |
24a0111e | 2877 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2878 | status = nfs4_check_delegmode(*dp, flags); |
2879 | if (status) | |
2880 | *dp = NULL; | |
c44c5eeb | 2881 | out: |
8b289b2c | 2882 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2883 | return nfs_ok; |
2884 | if (status) | |
2885 | return status; | |
dad1c067 | 2886 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2887 | return nfs_ok; |
567d9829 N |
2888 | } |
2889 | ||
b37ad28b | 2890 | static __be32 |
dcef0413 | 2891 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2892 | { |
dcef0413 | 2893 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2894 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2895 | |
8beefa24 | 2896 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2897 | /* ignore lock owners */ |
2898 | if (local->st_stateowner->so_is_open_owner == 0) | |
2899 | continue; | |
2900 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2901 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2902 | *stpp = local; |
2903 | /* check for conflicting share reservations */ | |
2904 | if (!test_share(local, open)) | |
77eaae8d | 2905 | return nfserr_share_denied; |
1da177e4 | 2906 | } |
77eaae8d | 2907 | return nfs_ok; |
1da177e4 LT |
2908 | } |
2909 | ||
21fb4016 BF |
2910 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2911 | { | |
2912 | int flags = 0; | |
2913 | ||
2914 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2915 | flags |= NFSD_MAY_READ; | |
2916 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2917 | flags |= NFSD_MAY_WRITE; | |
2918 | return flags; | |
2919 | } | |
2920 | ||
0c12eaff CB |
2921 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2922 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2923 | { |
2924 | __be32 status; | |
0c12eaff CB |
2925 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2926 | int access = nfs4_access_to_access(open->op_share_access); | |
2927 | ||
f9d7562f BF |
2928 | if (!fp->fi_fds[oflag]) { |
2929 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2930 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2931 | if (status) |
2932 | return status; | |
2933 | } | |
2934 | nfs4_file_get_access(fp, oflag); | |
2935 | ||
2936 | return nfs_ok; | |
2937 | } | |
2938 | ||
b37ad28b | 2939 | static inline __be32 |
1da177e4 LT |
2940 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2941 | struct nfsd4_open *open) | |
2942 | { | |
2943 | struct iattr iattr = { | |
2944 | .ia_valid = ATTR_SIZE, | |
2945 | .ia_size = 0, | |
2946 | }; | |
2947 | if (!open->op_truncate) | |
2948 | return 0; | |
2949 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2950 | return nfserr_inval; |
1da177e4 LT |
2951 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2952 | } | |
2953 | ||
b37ad28b | 2954 | static __be32 |
dcef0413 | 2955 | 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 | 2956 | { |
b6d2f1ca | 2957 | u32 op_share_access = open->op_share_access; |
7d947842 | 2958 | bool new_access; |
b37ad28b | 2959 | __be32 status; |
1da177e4 | 2960 | |
82c5ff1b | 2961 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2962 | if (new_access) { |
0c12eaff | 2963 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2964 | if (status) |
2965 | return status; | |
6c26d08f | 2966 | } |
1da177e4 LT |
2967 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2968 | if (status) { | |
f9d7562f | 2969 | if (new_access) { |
f197c271 | 2970 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2971 | nfs4_file_put_access(fp, oflag); |
2972 | } | |
1da177e4 LT |
2973 | return status; |
2974 | } | |
2975 | /* remember the open */ | |
82c5ff1b | 2976 | set_access(op_share_access, stp); |
ce0fc43c | 2977 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2978 | |
2979 | return nfs_ok; | |
2980 | } | |
2981 | ||
2982 | ||
1da177e4 | 2983 | static void |
1255a8f3 | 2984 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2985 | { |
dad1c067 | 2986 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2987 | } |
2988 | ||
14a24e99 BF |
2989 | /* Should we give out recallable state?: */ |
2990 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2991 | { | |
2992 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2993 | return true; | |
2994 | /* | |
2995 | * In the sessions case, since we don't have to establish a | |
2996 | * separate connection for callbacks, we assume it's OK | |
2997 | * until we hear otherwise: | |
2998 | */ | |
2999 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3000 | } | |
3001 | ||
22d38c4c BF |
3002 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
3003 | { | |
3004 | struct file_lock *fl; | |
3005 | ||
3006 | fl = locks_alloc_lock(); | |
3007 | if (!fl) | |
3008 | return NULL; | |
3009 | locks_init_lock(fl); | |
3010 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
3011 | fl->fl_flags = FL_LEASE; | |
3012 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
3013 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 3014 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 3015 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3016 | return fl; |
3017 | } | |
3018 | ||
99c41515 | 3019 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3020 | { |
acfdf5c3 | 3021 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
3022 | struct file_lock *fl; |
3023 | int status; | |
3024 | ||
99c41515 | 3025 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3026 | if (!fl) |
3027 | return -ENOMEM; | |
acfdf5c3 | 3028 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 3029 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 3030 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 3031 | if (status) { |
acfdf5c3 | 3032 | list_del_init(&dp->dl_perclnt); |
edab9782 | 3033 | locks_free_lock(fl); |
b1948a64 | 3034 | return status; |
edab9782 | 3035 | } |
acfdf5c3 | 3036 | fp->fi_lease = fl; |
cb0942b8 | 3037 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
3038 | atomic_set(&fp->fi_delegees, 1); |
3039 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
3040 | return 0; | |
3041 | } | |
3042 | ||
bf7bd3e9 | 3043 | static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp) |
acfdf5c3 | 3044 | { |
bf7bd3e9 | 3045 | int status; |
acfdf5c3 | 3046 | |
bf7bd3e9 BF |
3047 | if (fp->fi_had_conflict) |
3048 | return -EAGAIN; | |
3049 | get_nfs4_file(fp); | |
3050 | dp->dl_file = fp; | |
3051 | if (!fp->fi_lease) { | |
3052 | status = nfs4_setlease(dp); | |
3053 | if (status) | |
3054 | goto out_free; | |
3055 | return 0; | |
3056 | } | |
acfdf5c3 BF |
3057 | spin_lock(&recall_lock); |
3058 | if (fp->fi_had_conflict) { | |
3059 | spin_unlock(&recall_lock); | |
bf7bd3e9 BF |
3060 | status = -EAGAIN; |
3061 | goto out_free; | |
acfdf5c3 BF |
3062 | } |
3063 | atomic_inc(&fp->fi_delegees); | |
3064 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
3065 | spin_unlock(&recall_lock); | |
2a74aba7 | 3066 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 | 3067 | return 0; |
bf7bd3e9 BF |
3068 | out_free: |
3069 | put_nfs4_file(fp); | |
3070 | dp->dl_file = fp; | |
3071 | return status; | |
edab9782 BF |
3072 | } |
3073 | ||
4aa8913c BH |
3074 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3075 | { | |
3076 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3077 | if (status == -EAGAIN) | |
3078 | open->op_why_no_deleg = WND4_CONTENTION; | |
3079 | else { | |
3080 | open->op_why_no_deleg = WND4_RESOURCE; | |
3081 | switch (open->op_deleg_want) { | |
3082 | case NFS4_SHARE_WANT_READ_DELEG: | |
3083 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3084 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3085 | break; | |
3086 | case NFS4_SHARE_WANT_CANCEL: | |
3087 | open->op_why_no_deleg = WND4_CANCELLED; | |
3088 | break; | |
3089 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3090 | WARN_ON_ONCE(1); |
4aa8913c BH |
3091 | } |
3092 | } | |
3093 | } | |
3094 | ||
1da177e4 LT |
3095 | /* |
3096 | * Attempt to hand out a delegation. | |
99c41515 BF |
3097 | * |
3098 | * Note we don't support write delegations, and won't until the vfs has | |
3099 | * proper support for them. | |
1da177e4 LT |
3100 | */ |
3101 | static void | |
5ccb0066 SK |
3102 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
3103 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3104 | { |
3105 | struct nfs4_delegation *dp; | |
fe0750e5 | 3106 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 3107 | int cb_up; |
99c41515 | 3108 | int status = 0; |
1da177e4 | 3109 | |
fe0750e5 | 3110 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3111 | open->op_recall = 0; |
3112 | switch (open->op_claim_type) { | |
3113 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3114 | if (!cb_up) |
7b190fec | 3115 | open->op_recall = 1; |
99c41515 BF |
3116 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3117 | goto out_no_deleg; | |
7b190fec N |
3118 | break; |
3119 | case NFS4_OPEN_CLAIM_NULL: | |
99c41515 BF |
3120 | /* |
3121 | * Let's not give out any delegations till everyone's | |
3122 | * had the chance to reclaim theirs.... | |
3123 | */ | |
5ccb0066 | 3124 | if (locks_in_grace(net)) |
99c41515 | 3125 | goto out_no_deleg; |
dad1c067 | 3126 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3127 | goto out_no_deleg; |
9a0590ae SD |
3128 | /* |
3129 | * Also, if the file was opened for write or | |
3130 | * create, there's a good chance the client's | |
3131 | * about to write to it, resulting in an | |
3132 | * immediate recall (since we don't support | |
3133 | * write delegations): | |
3134 | */ | |
7b190fec | 3135 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3136 | goto out_no_deleg; |
3137 | if (open->op_create == NFS4_OPEN_CREATE) | |
3138 | goto out_no_deleg; | |
7b190fec N |
3139 | break; |
3140 | default: | |
99c41515 | 3141 | goto out_no_deleg; |
7b190fec | 3142 | } |
99c41515 | 3143 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh); |
dd239cc0 BF |
3144 | if (dp == NULL) |
3145 | goto out_no_deleg; | |
bf7bd3e9 | 3146 | status = nfs4_set_delegation(dp, stp->st_file); |
edab9782 | 3147 | if (status) |
dd239cc0 | 3148 | goto out_free; |
1da177e4 | 3149 | |
d5477a8d | 3150 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3151 | |
8c10cbdb | 3152 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3153 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3154 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
dd239cc0 BF |
3155 | return; |
3156 | out_free: | |
24ffb938 | 3157 | unhash_stid(&dp->dl_stid); |
acfdf5c3 | 3158 | nfs4_put_delegation(dp); |
dd239cc0 | 3159 | out_no_deleg: |
99c41515 BF |
3160 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3161 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3162 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3163 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3164 | open->op_recall = 1; |
3165 | } | |
99c41515 BF |
3166 | |
3167 | /* 4.1 client asking for a delegation? */ | |
3168 | if (open->op_deleg_want) | |
3169 | nfsd4_open_deleg_none_ext(open, status); | |
3170 | return; | |
1da177e4 LT |
3171 | } |
3172 | ||
e27f49c3 BH |
3173 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3174 | struct nfs4_delegation *dp) | |
3175 | { | |
3176 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3177 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3178 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3179 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3180 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3181 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3182 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3183 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3184 | } | |
3185 | /* Otherwise the client must be confused wanting a delegation | |
3186 | * it already has, therefore we don't return | |
3187 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3188 | */ | |
3189 | } | |
3190 | ||
1da177e4 LT |
3191 | /* |
3192 | * called with nfs4_lock_state() held. | |
3193 | */ | |
b37ad28b | 3194 | __be32 |
1da177e4 LT |
3195 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3196 | { | |
6668958f | 3197 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3198 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3199 | struct nfs4_file *fp = NULL; |
3200 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3201 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3202 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3203 | __be32 status; |
1da177e4 | 3204 | |
1da177e4 LT |
3205 | /* |
3206 | * Lookup file; if found, lookup stateid and check open request, | |
3207 | * and check for delegations in the process of being recalled. | |
3208 | * If not found, create the nfs4_file struct | |
3209 | */ | |
3210 | fp = find_file(ino); | |
3211 | if (fp) { | |
3212 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3213 | goto out; | |
41d22663 | 3214 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3215 | if (status) |
3216 | goto out; | |
1da177e4 | 3217 | } else { |
c44c5eeb | 3218 | status = nfserr_bad_stateid; |
8b289b2c | 3219 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3220 | goto out; |
3e772463 | 3221 | status = nfserr_jukebox; |
32513b40 BF |
3222 | fp = open->op_file; |
3223 | open->op_file = NULL; | |
3224 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3225 | } |
3226 | ||
3227 | /* | |
3228 | * OPEN the file, or upgrade an existing OPEN. | |
3229 | * If truncate fails, the OPEN fails. | |
3230 | */ | |
3231 | if (stp) { | |
3232 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3233 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3234 | if (status) |
3235 | goto out; | |
3236 | } else { | |
4cdc951b | 3237 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3238 | if (status) |
3239 | goto out; | |
3240 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3241 | if (status) |
1da177e4 | 3242 | goto out; |
4cdc951b BF |
3243 | stp = open->op_stp; |
3244 | open->op_stp = NULL; | |
996e0938 | 3245 | init_open_stateid(stp, fp, open); |
1da177e4 | 3246 | } |
dcef0413 BF |
3247 | update_stateid(&stp->st_stid.sc_stateid); |
3248 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3249 | |
d24433cd | 3250 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3251 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3252 | |
d24433cd BH |
3253 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3254 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3255 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3256 | goto nodeleg; | |
3257 | } | |
3258 | } | |
3259 | ||
1da177e4 LT |
3260 | /* |
3261 | * Attempt to hand out a delegation. No error return, because the | |
3262 | * OPEN succeeds even if we fail. | |
3263 | */ | |
5ccb0066 | 3264 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3265 | nodeleg: |
1da177e4 LT |
3266 | status = nfs_ok; |
3267 | ||
8c10cbdb | 3268 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3269 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3270 | out: |
d24433cd BH |
3271 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3272 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3273 | open->op_deleg_want) |
3274 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3275 | |
13cd2184 N |
3276 | if (fp) |
3277 | put_nfs4_file(fp); | |
37515177 | 3278 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3279 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3280 | /* |
3281 | * To finish the open response, we just need to set the rflags. | |
3282 | */ | |
3283 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3284 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3285 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3286 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3287 | ||
3288 | return status; | |
3289 | } | |
3290 | ||
d29b20cd BF |
3291 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3292 | { | |
3293 | if (open->op_openowner) { | |
3294 | struct nfs4_openowner *oo = open->op_openowner; | |
3295 | ||
3296 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3297 | list_del_init(&oo->oo_close_lru); | |
3298 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3299 | if (status) { | |
3300 | release_openowner(oo); | |
3301 | open->op_openowner = NULL; | |
3302 | } else | |
3303 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3304 | } | |
3305 | } | |
32513b40 BF |
3306 | if (open->op_file) |
3307 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3308 | if (open->op_stp) |
ef79859e | 3309 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3310 | } |
3311 | ||
9b2ef62b BF |
3312 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
3313 | { | |
3314 | struct nfs4_client *found; | |
3315 | ||
3316 | if (STALE_CLIENTID(clid, nn)) | |
3317 | return nfserr_stale_clientid; | |
3318 | found = find_confirmed_client(clid, session, nn); | |
3319 | if (clp) | |
3320 | *clp = found; | |
3321 | return found ? nfs_ok : nfserr_expired; | |
3322 | } | |
3323 | ||
b37ad28b | 3324 | __be32 |
b591480b BF |
3325 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3326 | clientid_t *clid) | |
1da177e4 LT |
3327 | { |
3328 | struct nfs4_client *clp; | |
b37ad28b | 3329 | __be32 status; |
7f2210fa | 3330 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3331 | |
3332 | nfs4_lock_state(); | |
3333 | dprintk("process_renew(%08x/%08x): starting\n", | |
3334 | clid->cl_boot, clid->cl_id); | |
9b2ef62b BF |
3335 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
3336 | if (status) | |
1da177e4 | 3337 | goto out; |
1da177e4 | 3338 | status = nfserr_cb_path_down; |
ea1da636 | 3339 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3340 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3341 | goto out; |
3342 | status = nfs_ok; | |
3343 | out: | |
3344 | nfs4_unlock_state(); | |
3345 | return status; | |
3346 | } | |
3347 | ||
a76b4319 | 3348 | static void |
12760c66 | 3349 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3350 | { |
33dcc481 | 3351 | /* do nothing if grace period already ended */ |
a51c84ed | 3352 | if (nn->grace_ended) |
33dcc481 JL |
3353 | return; |
3354 | ||
a76b4319 | 3355 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3356 | nn->grace_ended = true; |
12760c66 | 3357 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3358 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3359 | /* |
3360 | * Now that every NFSv4 client has had the chance to recover and | |
3361 | * to see the (possibly new, possibly shorter) lease time, we | |
3362 | * can safely set the next grace time to the current lease time: | |
3363 | */ | |
5284b44e | 3364 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3365 | } |
3366 | ||
fd39ca9a | 3367 | static time_t |
09121281 | 3368 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3369 | { |
3370 | struct nfs4_client *clp; | |
fe0750e5 | 3371 | struct nfs4_openowner *oo; |
1da177e4 LT |
3372 | struct nfs4_delegation *dp; |
3373 | struct list_head *pos, *next, reaplist; | |
3d733711 SK |
3374 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
3375 | time_t t, clientid_val = nn->nfsd4_lease; | |
3376 | time_t u, test_val = nn->nfsd4_lease; | |
1da177e4 LT |
3377 | |
3378 | nfs4_lock_state(); | |
3379 | ||
3380 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3381 | nfsd4_end_grace(nn); |
36acb66b | 3382 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3383 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3384 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3385 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3386 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3387 | t = clp->cl_time - cutoff; | |
3388 | if (clientid_val > t) | |
3389 | clientid_val = t; | |
3390 | break; | |
3391 | } | |
221a6876 | 3392 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3393 | dprintk("NFSD: client in use (clientid %08x)\n", |
3394 | clp->cl_clientid.cl_id); | |
3395 | continue; | |
3396 | } | |
221a6876 | 3397 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3398 | } |
c9a49628 | 3399 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3400 | list_for_each_safe(pos, next, &reaplist) { |
3401 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3402 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3403 | clp->cl_clientid.cl_id); | |
3404 | expire_client(clp); | |
3405 | } | |
1da177e4 | 3406 | spin_lock(&recall_lock); |
e8c69d17 | 3407 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3408 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3409 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3410 | continue; | |
1da177e4 LT |
3411 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
3412 | u = dp->dl_time - cutoff; | |
3413 | if (test_val > u) | |
3414 | test_val = u; | |
3415 | break; | |
3416 | } | |
1da177e4 LT |
3417 | list_move(&dp->dl_recall_lru, &reaplist); |
3418 | } | |
3419 | spin_unlock(&recall_lock); | |
3420 | list_for_each_safe(pos, next, &reaplist) { | |
3421 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 3422 | revoke_delegation(dp); |
1da177e4 | 3423 | } |
3d733711 | 3424 | test_val = nn->nfsd4_lease; |
73758fed | 3425 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3426 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3427 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3428 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3429 | if (test_val > u) |
3430 | test_val = u; | |
3431 | break; | |
3432 | } | |
fe0750e5 | 3433 | release_openowner(oo); |
1da177e4 LT |
3434 | } |
3435 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3436 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3437 | nfs4_unlock_state(); | |
3438 | return clientid_val; | |
3439 | } | |
3440 | ||
a254b246 HH |
3441 | static struct workqueue_struct *laundry_wq; |
3442 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3443 | |
3444 | static void | |
09121281 | 3445 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3446 | { |
3447 | time_t t; | |
09121281 SK |
3448 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3449 | work); | |
3450 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3451 | laundromat_work); | |
1da177e4 | 3452 | |
09121281 | 3453 | t = nfs4_laundromat(nn); |
1da177e4 | 3454 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3455 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3456 | } |
3457 | ||
f7a4d872 | 3458 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3459 | { |
f7a4d872 BF |
3460 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3461 | return nfserr_bad_stateid; | |
3462 | return nfs_ok; | |
1da177e4 LT |
3463 | } |
3464 | ||
1da177e4 | 3465 | static inline int |
82c5ff1b | 3466 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3467 | { |
82c5ff1b JL |
3468 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3469 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3470 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3471 | } |
3472 | ||
3473 | static inline int | |
82c5ff1b | 3474 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3475 | { |
82c5ff1b JL |
3476 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3477 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3478 | } |
3479 | ||
3480 | static | |
dcef0413 | 3481 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3482 | { |
b37ad28b | 3483 | __be32 status = nfserr_openmode; |
1da177e4 | 3484 | |
02921914 BF |
3485 | /* For lock stateid's, we test the parent open, not the lock: */ |
3486 | if (stp->st_openstp) | |
3487 | stp = stp->st_openstp; | |
82c5ff1b | 3488 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3489 | goto out; |
82c5ff1b | 3490 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3491 | goto out; |
3492 | status = nfs_ok; | |
3493 | out: | |
3494 | return status; | |
3495 | } | |
3496 | ||
b37ad28b | 3497 | static inline __be32 |
5ccb0066 | 3498 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3499 | { |
203a8c8e | 3500 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3501 | return nfs_ok; |
5ccb0066 | 3502 | else if (locks_in_grace(net)) { |
25985edc | 3503 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3504 | * conflicting state; so we must wait out the grace period. */ |
3505 | return nfserr_grace; | |
3506 | } else if (flags & WR_STATE) | |
3507 | return nfs4_share_conflict(current_fh, | |
3508 | NFS4_SHARE_DENY_WRITE); | |
3509 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3510 | return nfs4_share_conflict(current_fh, | |
3511 | NFS4_SHARE_DENY_READ); | |
3512 | } | |
3513 | ||
3514 | /* | |
3515 | * Allow READ/WRITE during grace period on recovered state only for files | |
3516 | * that are not able to provide mandatory locking. | |
3517 | */ | |
3518 | static inline int | |
5ccb0066 | 3519 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3520 | { |
5ccb0066 | 3521 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3522 | } |
3523 | ||
81b82965 BF |
3524 | /* Returns true iff a is later than b: */ |
3525 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3526 | { | |
1a9357f4 | 3527 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
3528 | } |
3529 | ||
57b7b43b | 3530 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3531 | { |
6668958f AA |
3532 | /* |
3533 | * When sessions are used the stateid generation number is ignored | |
3534 | * when it is zero. | |
3535 | */ | |
28dde241 | 3536 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3537 | return nfs_ok; |
3538 | ||
3539 | if (in->si_generation == ref->si_generation) | |
3540 | return nfs_ok; | |
6668958f | 3541 | |
0836f587 | 3542 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3543 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3544 | return nfserr_bad_stateid; |
3545 | /* | |
81b82965 BF |
3546 | * However, we could see a stateid from the past, even from a |
3547 | * non-buggy client. For example, if the client sends a lock | |
3548 | * while some IO is outstanding, the lock may bump si_generation | |
3549 | * while the IO is still in flight. The client could avoid that | |
3550 | * situation by waiting for responses on all the IO requests, | |
3551 | * but better performance may result in retrying IO that | |
3552 | * receives an old_stateid error if requests are rarely | |
3553 | * reordered in flight: | |
0836f587 | 3554 | */ |
81b82965 | 3555 | return nfserr_old_stateid; |
0836f587 BF |
3556 | } |
3557 | ||
7df302f7 | 3558 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3559 | { |
97b7e3b6 BF |
3560 | struct nfs4_stid *s; |
3561 | struct nfs4_ol_stateid *ols; | |
3562 | __be32 status; | |
17456804 | 3563 | |
7df302f7 CL |
3564 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3565 | return nfserr_bad_stateid; | |
3566 | /* Client debugging aid. */ | |
3567 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3568 | char addr_str[INET6_ADDRSTRLEN]; | |
3569 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3570 | sizeof(addr_str)); | |
3571 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3572 | "with incorrect client ID\n", addr_str); | |
3573 | return nfserr_bad_stateid; | |
3574 | } | |
38c2f4b1 | 3575 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3576 | if (!s) |
7df302f7 | 3577 | return nfserr_bad_stateid; |
36279ac1 | 3578 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3579 | if (status) |
97b7e3b6 | 3580 | return status; |
23340032 BF |
3581 | switch (s->sc_type) { |
3582 | case NFS4_DELEG_STID: | |
97b7e3b6 | 3583 | return nfs_ok; |
3bd64a5b BF |
3584 | case NFS4_REVOKED_DELEG_STID: |
3585 | return nfserr_deleg_revoked; | |
23340032 BF |
3586 | case NFS4_OPEN_STID: |
3587 | case NFS4_LOCK_STID: | |
3588 | ols = openlockstateid(s); | |
3589 | if (ols->st_stateowner->so_is_open_owner | |
3590 | && !(openowner(ols->st_stateowner)->oo_flags | |
3591 | & NFS4_OO_CONFIRMED)) | |
3592 | return nfserr_bad_stateid; | |
97b7e3b6 | 3593 | return nfs_ok; |
23340032 BF |
3594 | default: |
3595 | printk("unknown stateid type %x\n", s->sc_type); | |
3596 | case NFS4_CLOSED_STID: | |
97b7e3b6 | 3597 | return nfserr_bad_stateid; |
23340032 | 3598 | } |
17456804 BS |
3599 | } |
3600 | ||
3320fef1 SK |
3601 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
3602 | struct nfs4_stid **s, bool sessions, | |
3603 | struct nfsd_net *nn) | |
38c2f4b1 BF |
3604 | { |
3605 | struct nfs4_client *cl; | |
0eb6f20a | 3606 | __be32 status; |
38c2f4b1 BF |
3607 | |
3608 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3609 | return nfserr_bad_stateid; | |
0eb6f20a BF |
3610 | status = lookup_clientid(&stateid->si_opaque.so_clid, sessions, |
3611 | nn, &cl); | |
3612 | if (status == nfserr_stale_clientid) | |
38c2f4b1 | 3613 | return nfserr_stale_stateid; |
0eb6f20a BF |
3614 | if (status) |
3615 | return status; | |
38c2f4b1 BF |
3616 | *s = find_stateid_by_type(cl, stateid, typemask); |
3617 | if (!*s) | |
3618 | return nfserr_bad_stateid; | |
3619 | return nfs_ok; | |
38c2f4b1 BF |
3620 | } |
3621 | ||
1da177e4 LT |
3622 | /* |
3623 | * Checks for stateid operations | |
3624 | */ | |
b37ad28b | 3625 | __be32 |
5ccb0066 | 3626 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3627 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3628 | { |
69064a27 | 3629 | struct nfs4_stid *s; |
dcef0413 | 3630 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3631 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3632 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3633 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3634 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b37ad28b | 3635 | __be32 status; |
1da177e4 | 3636 | |
1da177e4 LT |
3637 | if (filpp) |
3638 | *filpp = NULL; | |
3639 | ||
5ccb0066 | 3640 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3641 | return nfserr_grace; |
3642 | ||
3643 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3644 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3645 | |
3320fef1 SK |
3646 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
3647 | &s, cstate->minorversion, nn); | |
38c2f4b1 BF |
3648 | if (status) |
3649 | return status; | |
69064a27 BF |
3650 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3651 | if (status) | |
3652 | goto out; | |
f7a4d872 BF |
3653 | switch (s->sc_type) { |
3654 | case NFS4_DELEG_STID: | |
69064a27 | 3655 | dp = delegstateid(s); |
dc9bf700 BF |
3656 | status = nfs4_check_delegmode(dp, flags); |
3657 | if (status) | |
3658 | goto out; | |
43b0178e | 3659 | if (filpp) { |
acfdf5c3 | 3660 | *filpp = dp->dl_file->fi_deleg_file; |
063b0fb9 BF |
3661 | if (!*filpp) { |
3662 | WARN_ON_ONCE(1); | |
3663 | status = nfserr_serverfault; | |
3664 | goto out; | |
3665 | } | |
43b0178e | 3666 | } |
f7a4d872 BF |
3667 | break; |
3668 | case NFS4_OPEN_STID: | |
3669 | case NFS4_LOCK_STID: | |
69064a27 | 3670 | stp = openlockstateid(s); |
f7a4d872 BF |
3671 | status = nfs4_check_fh(current_fh, stp); |
3672 | if (status) | |
1da177e4 | 3673 | goto out; |
fe0750e5 | 3674 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3675 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3676 | goto out; |
a4455be0 BF |
3677 | status = nfs4_check_openmode(stp, flags); |
3678 | if (status) | |
1da177e4 | 3679 | goto out; |
f9d7562f BF |
3680 | if (filpp) { |
3681 | if (flags & RD_STATE) | |
3682 | *filpp = find_readable_file(stp->st_file); | |
3683 | else | |
3684 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3685 | } |
f7a4d872 BF |
3686 | break; |
3687 | default: | |
3688 | return nfserr_bad_stateid; | |
1da177e4 LT |
3689 | } |
3690 | status = nfs_ok; | |
3691 | out: | |
3692 | return status; | |
3693 | } | |
3694 | ||
e1ca12df | 3695 | static __be32 |
dcef0413 | 3696 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3697 | { |
fe0750e5 | 3698 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3699 | return nfserr_locks_held; |
3700 | release_lock_stateid(stp); | |
3701 | return nfs_ok; | |
3702 | } | |
3703 | ||
17456804 BS |
3704 | /* |
3705 | * Test if the stateid is valid | |
3706 | */ | |
3707 | __be32 | |
3708 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3709 | struct nfsd4_test_stateid *test_stateid) | |
3710 | { | |
03cfb420 BS |
3711 | struct nfsd4_test_stateid_id *stateid; |
3712 | struct nfs4_client *cl = cstate->session->se_client; | |
3713 | ||
3714 | nfs4_lock_state(); | |
3715 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3716 | stateid->ts_id_status = |
3717 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3718 | nfs4_unlock_state(); |
3719 | ||
17456804 BS |
3720 | return nfs_ok; |
3721 | } | |
3722 | ||
e1ca12df BS |
3723 | __be32 |
3724 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3725 | struct nfsd4_free_stateid *free_stateid) | |
3726 | { | |
3727 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3728 | struct nfs4_stid *s; |
3bd64a5b | 3729 | struct nfs4_delegation *dp; |
38c2f4b1 | 3730 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3731 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3732 | |
3733 | nfs4_lock_state(); | |
38c2f4b1 | 3734 | s = find_stateid(cl, stateid); |
2da1cec7 | 3735 | if (!s) |
81b82965 | 3736 | goto out; |
2da1cec7 BF |
3737 | switch (s->sc_type) { |
3738 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3739 | ret = nfserr_locks_held; |
3740 | goto out; | |
2da1cec7 BF |
3741 | case NFS4_OPEN_STID: |
3742 | case NFS4_LOCK_STID: | |
3743 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3744 | if (ret) | |
3745 | goto out; | |
3746 | if (s->sc_type == NFS4_LOCK_STID) | |
3747 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3748 | else | |
3749 | ret = nfserr_locks_held; | |
f7a4d872 | 3750 | break; |
3bd64a5b BF |
3751 | case NFS4_REVOKED_DELEG_STID: |
3752 | dp = delegstateid(s); | |
3753 | destroy_revoked_delegation(dp); | |
3754 | ret = nfs_ok; | |
3755 | break; | |
f7a4d872 BF |
3756 | default: |
3757 | ret = nfserr_bad_stateid; | |
e1ca12df | 3758 | } |
e1ca12df BS |
3759 | out: |
3760 | nfs4_unlock_state(); | |
3761 | return ret; | |
3762 | } | |
3763 | ||
4c4cd222 N |
3764 | static inline int |
3765 | setlkflg (int type) | |
3766 | { | |
3767 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3768 | RD_STATE : WR_STATE; | |
3769 | } | |
1da177e4 | 3770 | |
dcef0413 | 3771 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3772 | { |
3773 | struct svc_fh *current_fh = &cstate->current_fh; | |
3774 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3775 | __be32 status; | |
3776 | ||
c0a5d93e BF |
3777 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3778 | if (status) | |
3779 | return status; | |
3bd64a5b BF |
3780 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
3781 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
3782 | /* |
3783 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
3784 | * nfserr_replay_me from the previous step, and |
3785 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
3786 | */ |
3787 | return nfserr_bad_stateid; | |
3788 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3789 | if (status) | |
3790 | return status; | |
3791 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3792 | } |
3793 | ||
1da177e4 LT |
3794 | /* |
3795 | * Checks for sequence id mutating operations. | |
3796 | */ | |
b37ad28b | 3797 | static __be32 |
dd453dfd | 3798 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3799 | stateid_t *stateid, char typemask, |
3320fef1 SK |
3800 | struct nfs4_ol_stateid **stpp, |
3801 | struct nfsd_net *nn) | |
1da177e4 | 3802 | { |
0836f587 | 3803 | __be32 status; |
38c2f4b1 | 3804 | struct nfs4_stid *s; |
1da177e4 | 3805 | |
8c10cbdb BH |
3806 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3807 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3808 | |
1da177e4 | 3809 | *stpp = NULL; |
3320fef1 SK |
3810 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
3811 | cstate->minorversion, nn); | |
c0a5d93e BF |
3812 | if (status) |
3813 | return status; | |
38c2f4b1 | 3814 | *stpp = openlockstateid(s); |
3d74e6a5 BF |
3815 | if (!nfsd4_has_session(cstate)) |
3816 | cstate->replay_owner = (*stpp)->st_stateowner; | |
1da177e4 | 3817 | |
c0a5d93e BF |
3818 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3819 | } | |
39325bd0 | 3820 | |
3320fef1 SK |
3821 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3822 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
3823 | { |
3824 | __be32 status; | |
3825 | struct nfs4_openowner *oo; | |
1da177e4 | 3826 | |
c0a5d93e | 3827 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 3828 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
3829 | if (status) |
3830 | return status; | |
c0a5d93e | 3831 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3832 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3833 | return nfserr_bad_stateid; |
3a4f98bb | 3834 | return nfs_ok; |
1da177e4 LT |
3835 | } |
3836 | ||
b37ad28b | 3837 | __be32 |
ca364317 | 3838 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3839 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3840 | { |
b37ad28b | 3841 | __be32 status; |
fe0750e5 | 3842 | struct nfs4_openowner *oo; |
dcef0413 | 3843 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3844 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3845 | |
a6a9f18f AV |
3846 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
3847 | cstate->current_fh.fh_dentry); | |
1da177e4 | 3848 | |
ca364317 | 3849 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3850 | if (status) |
3851 | return status; | |
1da177e4 LT |
3852 | |
3853 | nfs4_lock_state(); | |
3854 | ||
9072d5c6 | 3855 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3856 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 3857 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 3858 | if (status) |
68b66e82 | 3859 | goto out; |
fe0750e5 | 3860 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3861 | status = nfserr_bad_stateid; |
dad1c067 | 3862 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3863 | goto out; |
dad1c067 | 3864 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3865 | update_stateid(&stp->st_stid.sc_stateid); |
3866 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3867 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3868 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3869 | |
2a4317c5 | 3870 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3871 | status = nfs_ok; |
1da177e4 | 3872 | out: |
9411b1d4 | 3873 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3874 | if (!cstate->replay_owner) |
3875 | nfs4_unlock_state(); | |
1da177e4 LT |
3876 | return status; |
3877 | } | |
3878 | ||
6409a5a6 | 3879 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3880 | { |
82c5ff1b | 3881 | if (!test_access(access, stp)) |
6409a5a6 BF |
3882 | return; |
3883 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3884 | clear_access(access, stp); |
6409a5a6 | 3885 | } |
f197c271 | 3886 | |
6409a5a6 BF |
3887 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3888 | { | |
3889 | switch (to_access) { | |
3890 | case NFS4_SHARE_ACCESS_READ: | |
3891 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3892 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3893 | break; | |
3894 | case NFS4_SHARE_ACCESS_WRITE: | |
3895 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3896 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3897 | break; | |
3898 | case NFS4_SHARE_ACCESS_BOTH: | |
3899 | break; | |
3900 | default: | |
063b0fb9 | 3901 | WARN_ON_ONCE(1); |
1da177e4 LT |
3902 | } |
3903 | } | |
3904 | ||
3905 | static void | |
ce0fc43c | 3906 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3907 | { |
3908 | int i; | |
3909 | for (i = 0; i < 4; i++) { | |
3910 | if ((i & deny) != i) | |
ce0fc43c | 3911 | clear_deny(i, stp); |
1da177e4 LT |
3912 | } |
3913 | } | |
3914 | ||
b37ad28b | 3915 | __be32 |
ca364317 BF |
3916 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3917 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3918 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3919 | { |
b37ad28b | 3920 | __be32 status; |
dcef0413 | 3921 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3922 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3923 | |
a6a9f18f AV |
3924 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
3925 | cstate->current_fh.fh_dentry); | |
1da177e4 | 3926 | |
c30e92df | 3927 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3928 | if (od->od_deleg_want) |
3929 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3930 | od->od_deleg_want); | |
1da177e4 LT |
3931 | |
3932 | nfs4_lock_state(); | |
c0a5d93e | 3933 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 3934 | &od->od_stateid, &stp, nn); |
9072d5c6 | 3935 | if (status) |
1da177e4 | 3936 | goto out; |
1da177e4 | 3937 | status = nfserr_inval; |
82c5ff1b JL |
3938 | if (!test_access(od->od_share_access, stp)) { |
3939 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3940 | stp->st_access_bmap, od->od_share_access); |
3941 | goto out; | |
3942 | } | |
ce0fc43c | 3943 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3944 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3945 | stp->st_deny_bmap, od->od_share_deny); | |
3946 | goto out; | |
3947 | } | |
6409a5a6 | 3948 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3949 | |
ce0fc43c | 3950 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3951 | |
dcef0413 BF |
3952 | update_stateid(&stp->st_stid.sc_stateid); |
3953 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3954 | status = nfs_ok; |
3955 | out: | |
9411b1d4 | 3956 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3957 | if (!cstate->replay_owner) |
3958 | nfs4_unlock_state(); | |
1da177e4 LT |
3959 | return status; |
3960 | } | |
3961 | ||
f7a4d872 BF |
3962 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
3963 | { | |
3964 | unhash_open_stateid(s); | |
3965 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3966 | } |
3967 | ||
1da177e4 LT |
3968 | /* |
3969 | * nfs4_unlock_state() called after encode | |
3970 | */ | |
b37ad28b | 3971 | __be32 |
ca364317 | 3972 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3973 | struct nfsd4_close *close) |
1da177e4 | 3974 | { |
b37ad28b | 3975 | __be32 status; |
fe0750e5 | 3976 | struct nfs4_openowner *oo; |
dcef0413 | 3977 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
3978 | struct net *net = SVC_NET(rqstp); |
3979 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 3980 | |
a6a9f18f AV |
3981 | dprintk("NFSD: nfsd4_close on file %pd\n", |
3982 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
3983 | |
3984 | nfs4_lock_state(); | |
f7a4d872 BF |
3985 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3986 | &close->cl_stateid, | |
3987 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 3988 | &stp, nn); |
9411b1d4 | 3989 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 3990 | if (status) |
1da177e4 | 3991 | goto out; |
fe0750e5 | 3992 | oo = openowner(stp->st_stateowner); |
dcef0413 BF |
3993 | update_stateid(&stp->st_stid.sc_stateid); |
3994 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3995 | |
f7a4d872 | 3996 | nfsd4_close_open_stateid(stp); |
9411b1d4 BF |
3997 | |
3998 | if (cstate->minorversion) { | |
3999 | unhash_stid(&stp->st_stid); | |
4000 | free_generic_stateid(stp); | |
4001 | } else | |
4002 | oo->oo_last_closed_stid = stp; | |
04ef5954 | 4003 | |
74dbafaf | 4004 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3d74e6a5 | 4005 | if (cstate->minorversion) |
74dbafaf | 4006 | release_openowner(oo); |
3d74e6a5 | 4007 | else { |
74dbafaf BF |
4008 | /* |
4009 | * In the 4.0 case we need to keep the owners around a | |
4010 | * little while to handle CLOSE replay. | |
4011 | */ | |
53584f66 | 4012 | move_to_close_lru(oo, SVC_NET(rqstp)); |
74dbafaf BF |
4013 | } |
4014 | } | |
1da177e4 | 4015 | out: |
5ec094c1 BF |
4016 | if (!cstate->replay_owner) |
4017 | nfs4_unlock_state(); | |
1da177e4 LT |
4018 | return status; |
4019 | } | |
4020 | ||
b37ad28b | 4021 | __be32 |
ca364317 BF |
4022 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4023 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4024 | { |
203a8c8e BF |
4025 | struct nfs4_delegation *dp; |
4026 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4027 | struct nfs4_stid *s; |
b37ad28b | 4028 | __be32 status; |
3320fef1 | 4029 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4030 | |
ca364317 | 4031 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4032 | return status; |
1da177e4 LT |
4033 | |
4034 | nfs4_lock_state(); | |
3320fef1 SK |
4035 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
4036 | cstate->minorversion, nn); | |
38c2f4b1 | 4037 | if (status) |
203a8c8e | 4038 | goto out; |
38c2f4b1 | 4039 | dp = delegstateid(s); |
d5477a8d | 4040 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
4041 | if (status) |
4042 | goto out; | |
203a8c8e | 4043 | |
3bd64a5b | 4044 | destroy_delegation(dp); |
1da177e4 | 4045 | out: |
203a8c8e BF |
4046 | nfs4_unlock_state(); |
4047 | ||
1da177e4 LT |
4048 | return status; |
4049 | } | |
4050 | ||
4051 | ||
1da177e4 | 4052 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4053 | |
009673b4 | 4054 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
1da177e4 | 4055 | |
87df4de8 BH |
4056 | static inline u64 |
4057 | end_offset(u64 start, u64 len) | |
4058 | { | |
4059 | u64 end; | |
4060 | ||
4061 | end = start + len; | |
4062 | return end >= start ? end: NFS4_MAX_UINT64; | |
4063 | } | |
4064 | ||
4065 | /* last octet in a range */ | |
4066 | static inline u64 | |
4067 | last_byte_offset(u64 start, u64 len) | |
4068 | { | |
4069 | u64 end; | |
4070 | ||
063b0fb9 | 4071 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4072 | end = start + len; |
4073 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4074 | } | |
4075 | ||
009673b4 | 4076 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
4077 | { |
4078 | return (file_hashval(inode) + cl_id | |
4079 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 4080 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
4081 | } |
4082 | ||
1da177e4 LT |
4083 | /* |
4084 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4085 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4086 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4087 | * locking, this prevents us from being completely protocol-compliant. The | |
4088 | * real solution to this problem is to start using unsigned file offsets in | |
4089 | * the VFS, but this is a very deep change! | |
4090 | */ | |
4091 | static inline void | |
4092 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4093 | { | |
4094 | if (lock->fl_start < 0) | |
4095 | lock->fl_start = OFFSET_MAX; | |
4096 | if (lock->fl_end < 0) | |
4097 | lock->fl_end = OFFSET_MAX; | |
4098 | } | |
4099 | ||
d5b9026a N |
4100 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4101 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4102 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4103 | }; |
1da177e4 LT |
4104 | |
4105 | static inline void | |
4106 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4107 | { | |
fe0750e5 | 4108 | struct nfs4_lockowner *lo; |
1da177e4 | 4109 | |
d5b9026a | 4110 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4111 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4112 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4113 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4114 | if (!deny->ld_owner.data) |
4115 | /* We just don't care that much */ | |
4116 | goto nevermind; | |
fe0750e5 BF |
4117 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4118 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4119 | } else { |
7c13f344 BF |
4120 | nevermind: |
4121 | deny->ld_owner.len = 0; | |
4122 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4123 | deny->ld_clientid.cl_boot = 0; |
4124 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4125 | } |
4126 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4127 | deny->ld_length = NFS4_MAX_UINT64; |
4128 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4129 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4130 | deny->ld_type = NFS4_READ_LT; | |
4131 | if (fl->fl_type != F_RDLCK) | |
4132 | deny->ld_type = NFS4_WRITE_LT; | |
4133 | } | |
4134 | ||
b93d87c1 BF |
4135 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
4136 | { | |
4137 | struct nfs4_ol_stateid *lst; | |
4138 | ||
4139 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
4140 | return false; | |
4141 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4142 | struct nfs4_ol_stateid, st_perstateowner); | |
4143 | return lst->st_file->fi_inode == inode; | |
4144 | } | |
4145 | ||
fe0750e5 BF |
4146 | static struct nfs4_lockowner * |
4147 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
20e9e2bc | 4148 | struct xdr_netobj *owner, struct nfsd_net *nn) |
1da177e4 | 4149 | { |
009673b4 | 4150 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 4151 | struct nfs4_lockowner *lo; |
1da177e4 | 4152 | |
20e9e2bc | 4153 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
4154 | if (same_lockowner_ino(lo, inode, clid, owner)) |
4155 | return lo; | |
1da177e4 LT |
4156 | } |
4157 | return NULL; | |
4158 | } | |
4159 | ||
dcef0413 | 4160 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 4161 | { |
009673b4 BF |
4162 | struct inode *inode = open_stp->st_file->fi_inode; |
4163 | unsigned int inohash = lockowner_ino_hashval(inode, | |
4164 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
9b531137 | 4165 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
009673b4 | 4166 | |
9b531137 | 4167 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
20e9e2bc | 4168 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 4169 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
4170 | } |
4171 | ||
1da177e4 LT |
4172 | /* |
4173 | * Alloc a lock owner structure. | |
4174 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4175 | * occurred. |
1da177e4 | 4176 | * |
16bfdaaf | 4177 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4178 | */ |
4179 | ||
fe0750e5 | 4180 | static struct nfs4_lockowner * |
dcef0413 | 4181 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4182 | struct nfs4_lockowner *lo; |
1da177e4 | 4183 | |
fe0750e5 BF |
4184 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4185 | if (!lo) | |
1da177e4 | 4186 | return NULL; |
fe0750e5 BF |
4187 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4188 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4189 | /* It is the openowner seqid that will be incremented in encode in the |
4190 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4191 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4192 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4193 | return lo; | |
1da177e4 LT |
4194 | } |
4195 | ||
dcef0413 BF |
4196 | static struct nfs4_ol_stateid * |
4197 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4198 | { |
dcef0413 | 4199 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4200 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4201 | |
996e0938 | 4202 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4203 | if (stp == NULL) |
6136d2b4 | 4204 | return NULL; |
3abdb607 | 4205 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4206 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4207 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4208 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4209 | get_nfs4_file(fp); |
1da177e4 | 4210 | stp->st_file = fp; |
0997b173 | 4211 | stp->st_access_bmap = 0; |
1da177e4 | 4212 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4213 | stp->st_openstp = open_stp; |
1da177e4 LT |
4214 | return stp; |
4215 | } | |
4216 | ||
fd39ca9a | 4217 | static int |
1da177e4 LT |
4218 | check_lock_length(u64 offset, u64 length) |
4219 | { | |
87df4de8 | 4220 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4221 | LOFF_OVERFLOW(offset, length))); |
4222 | } | |
4223 | ||
dcef0413 | 4224 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4225 | { |
4226 | struct nfs4_file *fp = lock_stp->st_file; | |
4227 | int oflag = nfs4_access_to_omode(access); | |
4228 | ||
82c5ff1b | 4229 | if (test_access(access, lock_stp)) |
0997b173 BF |
4230 | return; |
4231 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4232 | set_access(access, lock_stp); |
0997b173 BF |
4233 | } |
4234 | ||
2355c596 | 4235 | 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 |
4236 | { |
4237 | struct nfs4_file *fi = ost->st_file; | |
4238 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4239 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4240 | struct nfs4_lockowner *lo; | |
4241 | unsigned int strhashval; | |
20e9e2bc | 4242 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4243 | |
20e9e2bc SK |
4244 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
4245 | &lock->v.new.owner, nn); | |
64a284d0 BF |
4246 | if (lo) { |
4247 | if (!cstate->minorversion) | |
4248 | return nfserr_bad_seqid; | |
4249 | /* XXX: a lockowner always has exactly one stateid: */ | |
4250 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4251 | struct nfs4_ol_stateid, st_perstateowner); | |
4252 | return nfs_ok; | |
4253 | } | |
16bfdaaf | 4254 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4255 | &lock->v.new.owner); |
4256 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4257 | if (lo == NULL) | |
4258 | return nfserr_jukebox; | |
4259 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4260 | if (*lst == NULL) { | |
4261 | release_lockowner(lo); | |
4262 | return nfserr_jukebox; | |
4263 | } | |
4264 | *new = true; | |
4265 | return nfs_ok; | |
4266 | } | |
4267 | ||
1da177e4 LT |
4268 | /* |
4269 | * LOCK operation | |
4270 | */ | |
b37ad28b | 4271 | __be32 |
ca364317 | 4272 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4273 | struct nfsd4_lock *lock) |
1da177e4 | 4274 | { |
fe0750e5 BF |
4275 | struct nfs4_openowner *open_sop = NULL; |
4276 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4277 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4278 | struct file *filp = NULL; |
21179d81 JL |
4279 | struct file_lock *file_lock = NULL; |
4280 | struct file_lock *conflock = NULL; | |
b37ad28b | 4281 | __be32 status = 0; |
64a284d0 | 4282 | bool new_state = false; |
b34f27aa | 4283 | int lkflg; |
b8dd7b9a | 4284 | int err; |
3320fef1 SK |
4285 | struct net *net = SVC_NET(rqstp); |
4286 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4287 | |
4288 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4289 | (long long) lock->lk_offset, | |
4290 | (long long) lock->lk_length); | |
4291 | ||
1da177e4 LT |
4292 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4293 | return nfserr_inval; | |
4294 | ||
ca364317 | 4295 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4296 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4297 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4298 | return status; | |
4299 | } | |
4300 | ||
1da177e4 LT |
4301 | nfs4_lock_state(); |
4302 | ||
4303 | if (lock->lk_is_new) { | |
dcef0413 | 4304 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4305 | |
4306 | if (nfsd4_has_session(cstate)) | |
4307 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4308 | memcpy(&lock->v.new.clientid, | |
4309 | &cstate->session->se_client->cl_clientid, | |
4310 | sizeof(clientid_t)); | |
4311 | ||
1da177e4 | 4312 | status = nfserr_stale_clientid; |
2c142baa | 4313 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4314 | goto out; |
1da177e4 | 4315 | |
1da177e4 | 4316 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4317 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4318 | lock->lk_new_open_seqid, |
4319 | &lock->lk_new_open_stateid, | |
3320fef1 | 4320 | &open_stp, nn); |
37515177 | 4321 | if (status) |
1da177e4 | 4322 | goto out; |
fe0750e5 | 4323 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4324 | status = nfserr_bad_stateid; |
684e5638 | 4325 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4326 | &lock->v.new.clientid)) |
4327 | goto out; | |
64a284d0 BF |
4328 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4329 | &lock_stp, &new_state); | |
e1aaa891 | 4330 | } else |
dd453dfd | 4331 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4332 | lock->lk_old_lock_seqid, |
4333 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4334 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4335 | if (status) |
4336 | goto out; | |
64a284d0 | 4337 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4338 | |
b34f27aa BF |
4339 | lkflg = setlkflg(lock->lk_type); |
4340 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4341 | if (status) | |
4342 | goto out; | |
4343 | ||
0dd395dc | 4344 | status = nfserr_grace; |
3320fef1 | 4345 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4346 | goto out; |
4347 | status = nfserr_no_grace; | |
3320fef1 | 4348 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4349 | goto out; |
4350 | ||
21179d81 JL |
4351 | file_lock = locks_alloc_lock(); |
4352 | if (!file_lock) { | |
4353 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4354 | status = nfserr_jukebox; | |
4355 | goto out; | |
4356 | } | |
4357 | ||
4358 | locks_init_lock(file_lock); | |
1da177e4 LT |
4359 | switch (lock->lk_type) { |
4360 | case NFS4_READ_LT: | |
4361 | case NFS4_READW_LT: | |
0997b173 BF |
4362 | filp = find_readable_file(lock_stp->st_file); |
4363 | if (filp) | |
4364 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4365 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4366 | break; |
1da177e4 LT |
4367 | case NFS4_WRITE_LT: |
4368 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4369 | filp = find_writeable_file(lock_stp->st_file); |
4370 | if (filp) | |
4371 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4372 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4373 | break; |
1da177e4 LT |
4374 | default: |
4375 | status = nfserr_inval; | |
4376 | goto out; | |
4377 | } | |
f9d7562f BF |
4378 | if (!filp) { |
4379 | status = nfserr_openmode; | |
4380 | goto out; | |
4381 | } | |
21179d81 JL |
4382 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4383 | file_lock->fl_pid = current->tgid; | |
4384 | file_lock->fl_file = filp; | |
4385 | file_lock->fl_flags = FL_POSIX; | |
4386 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4387 | file_lock->fl_start = lock->lk_offset; | |
4388 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4389 | nfs4_transform_lock_offset(file_lock); | |
4390 | ||
4391 | conflock = locks_alloc_lock(); | |
4392 | if (!conflock) { | |
4393 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4394 | status = nfserr_jukebox; | |
4395 | goto out; | |
4396 | } | |
1da177e4 | 4397 | |
21179d81 | 4398 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4399 | switch (-err) { |
1da177e4 | 4400 | case 0: /* success! */ |
dcef0413 BF |
4401 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4402 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4403 | sizeof(stateid_t)); |
b8dd7b9a | 4404 | status = 0; |
eb76b3fd AA |
4405 | break; |
4406 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4407 | status = nfserr_denied; | |
4408 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4409 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4410 | break; |
1da177e4 LT |
4411 | case (EDEADLK): |
4412 | status = nfserr_deadlock; | |
eb76b3fd | 4413 | break; |
3e772463 | 4414 | default: |
fd85b817 | 4415 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4416 | status = nfserrno(err); |
eb76b3fd | 4417 | break; |
1da177e4 | 4418 | } |
1da177e4 | 4419 | out: |
64a284d0 | 4420 | if (status && new_state) |
f044ff83 | 4421 | release_lockowner(lock_sop); |
9411b1d4 | 4422 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4423 | if (!cstate->replay_owner) |
4424 | nfs4_unlock_state(); | |
21179d81 JL |
4425 | if (file_lock) |
4426 | locks_free_lock(file_lock); | |
4427 | if (conflock) | |
4428 | locks_free_lock(conflock); | |
1da177e4 LT |
4429 | return status; |
4430 | } | |
4431 | ||
55ef1274 BF |
4432 | /* |
4433 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4434 | * so we do a temporary open here just to get an open file to pass to | |
4435 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4436 | * inode operation.) | |
4437 | */ | |
04da6e9d | 4438 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4439 | { |
4440 | struct file *file; | |
04da6e9d AV |
4441 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4442 | if (!err) { | |
4443 | err = nfserrno(vfs_test_lock(file, lock)); | |
4444 | nfsd_close(file); | |
4445 | } | |
55ef1274 BF |
4446 | return err; |
4447 | } | |
4448 | ||
1da177e4 LT |
4449 | /* |
4450 | * LOCKT operation | |
4451 | */ | |
b37ad28b | 4452 | __be32 |
ca364317 BF |
4453 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4454 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4455 | { |
4456 | struct inode *inode; | |
21179d81 | 4457 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4458 | struct nfs4_lockowner *lo; |
b37ad28b | 4459 | __be32 status; |
7f2210fa | 4460 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4461 | |
5ccb0066 | 4462 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4463 | return nfserr_grace; |
4464 | ||
4465 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4466 | return nfserr_inval; | |
4467 | ||
1da177e4 LT |
4468 | nfs4_lock_state(); |
4469 | ||
9b2ef62b BF |
4470 | if (!nfsd4_has_session(cstate)) { |
4471 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); | |
4472 | if (status) | |
4473 | goto out; | |
4474 | } | |
1da177e4 | 4475 | |
75c096f7 | 4476 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4477 | goto out; |
1da177e4 | 4478 | |
ca364317 | 4479 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4480 | file_lock = locks_alloc_lock(); |
4481 | if (!file_lock) { | |
4482 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4483 | status = nfserr_jukebox; | |
4484 | goto out; | |
4485 | } | |
4486 | locks_init_lock(file_lock); | |
1da177e4 LT |
4487 | switch (lockt->lt_type) { |
4488 | case NFS4_READ_LT: | |
4489 | case NFS4_READW_LT: | |
21179d81 | 4490 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4491 | break; |
4492 | case NFS4_WRITE_LT: | |
4493 | case NFS4_WRITEW_LT: | |
21179d81 | 4494 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4495 | break; |
4496 | default: | |
2fdada03 | 4497 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4498 | status = nfserr_inval; |
4499 | goto out; | |
4500 | } | |
4501 | ||
20e9e2bc | 4502 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4503 | if (lo) |
21179d81 JL |
4504 | file_lock->fl_owner = (fl_owner_t)lo; |
4505 | file_lock->fl_pid = current->tgid; | |
4506 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4507 | |
21179d81 JL |
4508 | file_lock->fl_start = lockt->lt_offset; |
4509 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4510 | |
21179d81 | 4511 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4512 | |
21179d81 | 4513 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4514 | if (status) |
fd85b817 | 4515 | goto out; |
04da6e9d | 4516 | |
21179d81 | 4517 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4518 | status = nfserr_denied; |
21179d81 | 4519 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4520 | } |
4521 | out: | |
4522 | nfs4_unlock_state(); | |
21179d81 JL |
4523 | if (file_lock) |
4524 | locks_free_lock(file_lock); | |
1da177e4 LT |
4525 | return status; |
4526 | } | |
4527 | ||
b37ad28b | 4528 | __be32 |
ca364317 | 4529 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4530 | struct nfsd4_locku *locku) |
1da177e4 | 4531 | { |
dcef0413 | 4532 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4533 | struct file *filp = NULL; |
21179d81 | 4534 | struct file_lock *file_lock = NULL; |
b37ad28b | 4535 | __be32 status; |
b8dd7b9a | 4536 | int err; |
3320fef1 SK |
4537 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4538 | ||
1da177e4 LT |
4539 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4540 | (long long) locku->lu_offset, | |
4541 | (long long) locku->lu_length); | |
4542 | ||
4543 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4544 | return nfserr_inval; | |
4545 | ||
4546 | nfs4_lock_state(); | |
4547 | ||
9072d5c6 | 4548 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4549 | &locku->lu_stateid, NFS4_LOCK_STID, |
4550 | &stp, nn); | |
9072d5c6 | 4551 | if (status) |
1da177e4 | 4552 | goto out; |
f9d7562f BF |
4553 | filp = find_any_file(stp->st_file); |
4554 | if (!filp) { | |
4555 | status = nfserr_lock_range; | |
4556 | goto out; | |
4557 | } | |
21179d81 JL |
4558 | file_lock = locks_alloc_lock(); |
4559 | if (!file_lock) { | |
4560 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4561 | status = nfserr_jukebox; | |
4562 | goto out; | |
4563 | } | |
4564 | locks_init_lock(file_lock); | |
4565 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 4566 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
4567 | file_lock->fl_pid = current->tgid; |
4568 | file_lock->fl_file = filp; | |
4569 | file_lock->fl_flags = FL_POSIX; | |
4570 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4571 | file_lock->fl_start = locku->lu_offset; | |
4572 | ||
4573 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4574 | locku->lu_length); | |
4575 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 4576 | |
21179d81 | 4577 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4578 | if (err) { |
fd85b817 | 4579 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4580 | goto out_nfserr; |
4581 | } | |
dcef0413 BF |
4582 | update_stateid(&stp->st_stid.sc_stateid); |
4583 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4584 | |
4585 | out: | |
9411b1d4 | 4586 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
4587 | if (!cstate->replay_owner) |
4588 | nfs4_unlock_state(); | |
21179d81 JL |
4589 | if (file_lock) |
4590 | locks_free_lock(file_lock); | |
1da177e4 LT |
4591 | return status; |
4592 | ||
4593 | out_nfserr: | |
b8dd7b9a | 4594 | status = nfserrno(err); |
1da177e4 LT |
4595 | goto out; |
4596 | } | |
4597 | ||
4598 | /* | |
4599 | * returns | |
4600 | * 1: locks held by lockowner | |
4601 | * 0: no locks held by lockowner | |
4602 | */ | |
4603 | static int | |
fe0750e5 | 4604 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4605 | { |
4606 | struct file_lock **flpp; | |
f9d7562f | 4607 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4608 | int status = 0; |
4609 | ||
1c8c601a | 4610 | spin_lock(&inode->i_lock); |
1da177e4 | 4611 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4612 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4613 | status = 1; |
4614 | goto out; | |
796dadfd | 4615 | } |
1da177e4 LT |
4616 | } |
4617 | out: | |
1c8c601a | 4618 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
4619 | return status; |
4620 | } | |
4621 | ||
b37ad28b | 4622 | __be32 |
b591480b BF |
4623 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4624 | struct nfsd4_compound_state *cstate, | |
4625 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4626 | { |
4627 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4628 | struct nfs4_stateowner *sop; |
fe0750e5 | 4629 | struct nfs4_lockowner *lo; |
dcef0413 | 4630 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4631 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4632 | struct list_head matches; |
16bfdaaf | 4633 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4634 | __be32 status; |
7f2210fa | 4635 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4636 | |
4637 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4638 | clid->cl_boot, clid->cl_id); | |
4639 | ||
1da177e4 LT |
4640 | nfs4_lock_state(); |
4641 | ||
9b2ef62b BF |
4642 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
4643 | if (status) | |
4644 | goto out; | |
4645 | ||
3e9e3dbe | 4646 | status = nfserr_locks_held; |
3e9e3dbe | 4647 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4648 | |
9b531137 | 4649 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
4650 | if (sop->so_is_open_owner) |
4651 | continue; | |
06f1f864 BF |
4652 | if (!same_owner_str(sop, owner, clid)) |
4653 | continue; | |
4654 | list_for_each_entry(stp, &sop->so_stateids, | |
4655 | st_perstateowner) { | |
4656 | lo = lockowner(sop); | |
4657 | if (check_for_locks(stp->st_file, lo)) | |
4658 | goto out; | |
4659 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4660 | } |
3e9e3dbe N |
4661 | } |
4662 | /* Clients probably won't expect us to return with some (but not all) | |
4663 | * of the lockowner state released; so don't release any until all | |
4664 | * have been checked. */ | |
4665 | status = nfs_ok; | |
0fa822e4 | 4666 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4667 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4668 | lo_list); | |
0fa822e4 N |
4669 | /* unhash_stateowner deletes so_perclient only |
4670 | * for openowners. */ | |
fe0750e5 BF |
4671 | list_del(&lo->lo_list); |
4672 | release_lockowner(lo); | |
1da177e4 LT |
4673 | } |
4674 | out: | |
4675 | nfs4_unlock_state(); | |
4676 | return status; | |
4677 | } | |
4678 | ||
4679 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4680 | alloc_reclaim(void) |
1da177e4 | 4681 | { |
a55370a3 | 4682 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4683 | } |
4684 | ||
0ce0c2b5 | 4685 | bool |
52e19c09 | 4686 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4687 | { |
0ce0c2b5 | 4688 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4689 | |
52e19c09 | 4690 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4691 | return (crp && crp->cr_clp); |
c7b9a459 N |
4692 | } |
4693 | ||
1da177e4 LT |
4694 | /* |
4695 | * failure => all reset bets are off, nfserr_no_grace... | |
4696 | */ | |
772a9bbb | 4697 | struct nfs4_client_reclaim * |
52e19c09 | 4698 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4699 | { |
4700 | unsigned int strhashval; | |
772a9bbb | 4701 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4702 | |
a55370a3 N |
4703 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4704 | crp = alloc_reclaim(); | |
772a9bbb JL |
4705 | if (crp) { |
4706 | strhashval = clientstr_hashval(name); | |
4707 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4708 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4709 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4710 | crp->cr_clp = NULL; |
52e19c09 | 4711 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4712 | } |
4713 | return crp; | |
1da177e4 LT |
4714 | } |
4715 | ||
ce30e539 | 4716 | void |
52e19c09 | 4717 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4718 | { |
4719 | list_del(&crp->cr_strhash); | |
4720 | kfree(crp); | |
52e19c09 | 4721 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4722 | } |
4723 | ||
2a4317c5 | 4724 | void |
52e19c09 | 4725 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4726 | { |
4727 | struct nfs4_client_reclaim *crp = NULL; | |
4728 | int i; | |
4729 | ||
1da177e4 | 4730 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4731 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4732 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4733 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4734 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4735 | } |
4736 | } | |
063b0fb9 | 4737 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4738 | } |
4739 | ||
4740 | /* | |
4741 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4742 | struct nfs4_client_reclaim * |
52e19c09 | 4743 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4744 | { |
4745 | unsigned int strhashval; | |
1da177e4 LT |
4746 | struct nfs4_client_reclaim *crp = NULL; |
4747 | ||
278c931c | 4748 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4749 | |
278c931c | 4750 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4751 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4752 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4753 | return crp; |
4754 | } | |
4755 | } | |
4756 | return NULL; | |
4757 | } | |
4758 | ||
4759 | /* | |
4760 | * Called from OPEN. Look for clientid in reclaim list. | |
4761 | */ | |
b37ad28b | 4762 | __be32 |
3320fef1 | 4763 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4764 | { |
a52d726b JL |
4765 | struct nfs4_client *clp; |
4766 | ||
4767 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4768 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4769 | if (clp == NULL) |
4770 | return nfserr_reclaim_bad; | |
4771 | ||
4772 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4773 | } |
4774 | ||
65178db4 BS |
4775 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4776 | ||
44e34da6 BS |
4777 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4778 | { | |
221a6876 BF |
4779 | if (mark_client_expired(clp)) |
4780 | return 0; | |
44e34da6 BS |
4781 | expire_client(clp); |
4782 | return 1; | |
4783 | } | |
4784 | ||
184c1847 BS |
4785 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4786 | { | |
4787 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4788 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4789 | printk(KERN_INFO "NFS Client: %s\n", buf); |
4790 | return 1; | |
4791 | } | |
4792 | ||
4793 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
4794 | const char *type) | |
4795 | { | |
4796 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4797 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4798 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
4799 | } | |
4800 | ||
fc29171f BS |
4801 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) |
4802 | { | |
4803 | struct nfs4_openowner *oop; | |
4804 | struct nfs4_lockowner *lop, *lo_next; | |
4805 | struct nfs4_ol_stateid *stp, *st_next; | |
4806 | u64 count = 0; | |
4807 | ||
4808 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
4809 | list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { | |
4810 | list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { | |
4811 | if (func) | |
4812 | func(lop); | |
4813 | if (++count == max) | |
4814 | return count; | |
4815 | } | |
4816 | } | |
4817 | } | |
4818 | ||
4819 | return count; | |
4820 | } | |
4821 | ||
4822 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
4823 | { | |
4824 | return nfsd_foreach_client_lock(clp, max, release_lockowner); | |
4825 | } | |
4826 | ||
184c1847 BS |
4827 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
4828 | { | |
4829 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
4830 | nfsd_print_count(clp, count, "locked files"); | |
4831 | return count; | |
4832 | } | |
4833 | ||
4dbdbda8 BS |
4834 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
4835 | { | |
4836 | struct nfs4_openowner *oop, *next; | |
4837 | u64 count = 0; | |
4838 | ||
4839 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
4840 | if (func) | |
4841 | func(oop); | |
4842 | if (++count == max) | |
4843 | break; | |
4844 | } | |
4845 | ||
4846 | return count; | |
4847 | } | |
4848 | ||
4849 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
4850 | { | |
4851 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
4852 | } | |
4853 | ||
184c1847 BS |
4854 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
4855 | { | |
4856 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
4857 | nfsd_print_count(clp, count, "open files"); | |
4858 | return count; | |
4859 | } | |
4860 | ||
269de30f BS |
4861 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
4862 | struct list_head *victims) | |
4863 | { | |
4864 | struct nfs4_delegation *dp, *next; | |
4865 | u64 count = 0; | |
4866 | ||
4867 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { | |
4868 | if (victims) | |
4869 | list_move(&dp->dl_recall_lru, victims); | |
4870 | if (++count == max) | |
4871 | break; | |
4872 | } | |
4873 | return count; | |
4874 | } | |
4875 | ||
4876 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
4877 | { | |
4878 | struct nfs4_delegation *dp, *next; | |
4879 | LIST_HEAD(victims); | |
4880 | u64 count; | |
4881 | ||
4882 | spin_lock(&recall_lock); | |
4883 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4884 | spin_unlock(&recall_lock); | |
4885 | ||
4886 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
3bd64a5b | 4887 | revoke_delegation(dp); |
269de30f BS |
4888 | |
4889 | return count; | |
4890 | } | |
4891 | ||
4892 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
4893 | { | |
4894 | struct nfs4_delegation *dp, *next; | |
4895 | LIST_HEAD(victims); | |
4896 | u64 count; | |
4897 | ||
4898 | spin_lock(&recall_lock); | |
4899 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4900 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4901 | nfsd_break_one_deleg(dp); | |
4902 | spin_unlock(&recall_lock); | |
4903 | ||
4904 | return count; | |
4905 | } | |
4906 | ||
184c1847 BS |
4907 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
4908 | { | |
4909 | u64 count = 0; | |
4910 | ||
4911 | spin_lock(&recall_lock); | |
4912 | count = nfsd_find_all_delegations(clp, max, NULL); | |
4913 | spin_unlock(&recall_lock); | |
4914 | ||
4915 | nfsd_print_count(clp, count, "delegations"); | |
4916 | return count; | |
4917 | } | |
4918 | ||
44e34da6 | 4919 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
4920 | { |
4921 | struct nfs4_client *clp, *next; | |
44e34da6 | 4922 | u64 count = 0; |
3320fef1 | 4923 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 4924 | |
44e34da6 BS |
4925 | if (!nfsd_netns_ready(nn)) |
4926 | return 0; | |
4927 | ||
5ed58bb2 | 4928 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
4929 | count += func(clp, max - count); |
4930 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
4931 | break; |
4932 | } | |
65178db4 | 4933 | |
44e34da6 BS |
4934 | return count; |
4935 | } | |
4936 | ||
6c1e82a4 BS |
4937 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
4938 | { | |
4939 | struct nfs4_client *clp; | |
4940 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
4941 | ||
4942 | if (!nfsd_netns_ready(nn)) | |
4943 | return NULL; | |
4944 | ||
4945 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
4946 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
4947 | return clp; | |
4948 | } | |
4949 | return NULL; | |
4950 | } | |
4951 | ||
65178db4 BS |
4952 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
4953 | ||
ac4d8ff2 | 4954 | /* initialization to perform at module load time: */ |
1da177e4 | 4955 | |
72083396 | 4956 | void |
ac4d8ff2 | 4957 | nfs4_state_init(void) |
1da177e4 | 4958 | { |
ac4d8ff2 N |
4959 | } |
4960 | ||
c2f1a551 MS |
4961 | /* |
4962 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4963 | * client may quite reasonably hang on to a delegation as long as it has | |
4964 | * the inode cached. This becomes an obvious problem the first time a | |
4965 | * client's inode cache approaches the size of the server's total memory. | |
4966 | * | |
4967 | * For now we avoid this problem by imposing a hard limit on the number | |
4968 | * of delegations, which varies according to the server's memory size. | |
4969 | */ | |
4970 | static void | |
4971 | set_max_delegations(void) | |
4972 | { | |
4973 | /* | |
4974 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4975 | * estimates suggest that in the worst case (where every delegation | |
4976 | * is for a different inode), a delegation could take about 1.5K, | |
4977 | * giving a worst case usage of about 6% of memory. | |
4978 | */ | |
4979 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4980 | } | |
4981 | ||
d85ed443 | 4982 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
4983 | { |
4984 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4985 | int i; | |
4986 | ||
4987 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
4988 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4989 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 4990 | goto err; |
0a7ec377 SK |
4991 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
4992 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4993 | if (!nn->unconf_id_hashtbl) | |
4994 | goto err_unconf_id; | |
9b531137 SK |
4995 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
4996 | OWNER_HASH_SIZE, GFP_KERNEL); | |
4997 | if (!nn->ownerstr_hashtbl) | |
4998 | goto err_ownerstr; | |
20e9e2bc SK |
4999 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
5000 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); | |
5001 | if (!nn->lockowner_ino_hashtbl) | |
5002 | goto err_lockowner_ino; | |
1872de0e SK |
5003 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5004 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5005 | if (!nn->sessionid_hashtbl) | |
5006 | goto err_sessionid; | |
8daae4dc | 5007 | |
382a62e7 | 5008 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5009 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5010 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5011 | } |
9b531137 SK |
5012 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
5013 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
20e9e2bc SK |
5014 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
5015 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); | |
1872de0e SK |
5016 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5017 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5018 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5019 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5020 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5021 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5022 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5023 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5024 | |
09121281 | 5025 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5026 | get_net(net); |
09121281 | 5027 | |
8daae4dc | 5028 | return 0; |
382a62e7 | 5029 | |
1872de0e SK |
5030 | err_sessionid: |
5031 | kfree(nn->lockowner_ino_hashtbl); | |
20e9e2bc SK |
5032 | err_lockowner_ino: |
5033 | kfree(nn->ownerstr_hashtbl); | |
9b531137 SK |
5034 | err_ownerstr: |
5035 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5036 | err_unconf_id: |
5037 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5038 | err: |
5039 | return -ENOMEM; | |
8daae4dc SK |
5040 | } |
5041 | ||
5042 | static void | |
4dce0ac9 | 5043 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5044 | { |
5045 | int i; | |
5046 | struct nfs4_client *clp = NULL; | |
5047 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
a99454aa | 5048 | struct rb_node *node, *tmp; |
8daae4dc SK |
5049 | |
5050 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5051 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5052 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5053 | destroy_client(clp); | |
5054 | } | |
5055 | } | |
a99454aa SK |
5056 | |
5057 | node = rb_first(&nn->unconf_name_tree); | |
5058 | while (node != NULL) { | |
5059 | tmp = node; | |
5060 | node = rb_next(tmp); | |
5061 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
5062 | rb_erase(tmp, &nn->unconf_name_tree); | |
5063 | destroy_client(clp); | |
5064 | } | |
5065 | ||
1872de0e | 5066 | kfree(nn->sessionid_hashtbl); |
20e9e2bc | 5067 | kfree(nn->lockowner_ino_hashtbl); |
9b531137 | 5068 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5069 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5070 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5071 | put_net(net); |
8daae4dc SK |
5072 | } |
5073 | ||
f252bc68 | 5074 | int |
d85ed443 | 5075 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5076 | { |
5e1533c7 | 5077 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5078 | int ret; |
5079 | ||
d85ed443 | 5080 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5081 | if (ret) |
5082 | return ret; | |
5e1533c7 | 5083 | nfsd4_client_tracking_init(net); |
2c142baa | 5084 | nn->boot_time = get_seconds(); |
5ccb0066 | 5085 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5086 | nn->grace_ended = false; |
d85ed443 | 5087 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5088 | nn->nfsd4_grace, net); |
5089 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5090 | return 0; |
5091 | } | |
5092 | ||
5093 | /* initialization to perform when the nfsd service is started: */ | |
5094 | ||
5095 | int | |
5096 | nfs4_state_start(void) | |
5097 | { | |
5098 | int ret; | |
5099 | ||
b5a1a81e | 5100 | ret = set_callback_cred(); |
d85ed443 SK |
5101 | if (ret) |
5102 | return -ENOMEM; | |
58da282b | 5103 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5104 | if (laundry_wq == NULL) { |
5105 | ret = -ENOMEM; | |
5106 | goto out_recovery; | |
5107 | } | |
b5a1a81e BF |
5108 | ret = nfsd4_create_callback_queue(); |
5109 | if (ret) | |
5110 | goto out_free_laundry; | |
09121281 | 5111 | |
c2f1a551 | 5112 | set_max_delegations(); |
d85ed443 | 5113 | |
b5a1a81e | 5114 | return 0; |
d85ed443 | 5115 | |
b5a1a81e BF |
5116 | out_free_laundry: |
5117 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5118 | out_recovery: |
b5a1a81e | 5119 | return ret; |
1da177e4 LT |
5120 | } |
5121 | ||
ac55fdc4 | 5122 | /* should be called with the state lock held */ |
f252bc68 | 5123 | void |
4dce0ac9 | 5124 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5125 | { |
1da177e4 | 5126 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5127 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5128 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5129 | |
4dce0ac9 SK |
5130 | cancel_delayed_work_sync(&nn->laundromat_work); |
5131 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5132 | |
1da177e4 LT |
5133 | INIT_LIST_HEAD(&reaplist); |
5134 | spin_lock(&recall_lock); | |
e8c69d17 | 5135 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
5136 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
5137 | list_move(&dp->dl_recall_lru, &reaplist); | |
5138 | } | |
5139 | spin_unlock(&recall_lock); | |
5140 | list_for_each_safe(pos, next, &reaplist) { | |
5141 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 5142 | destroy_delegation(dp); |
1da177e4 LT |
5143 | } |
5144 | ||
3320fef1 | 5145 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5146 | nfs4_state_destroy_net(net); |
1da177e4 LT |
5147 | } |
5148 | ||
5149 | void | |
5150 | nfs4_state_shutdown(void) | |
5151 | { | |
5e8d5c29 | 5152 | destroy_workqueue(laundry_wq); |
c3935e30 | 5153 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5154 | } |
8b70484c TM |
5155 | |
5156 | static void | |
5157 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5158 | { | |
37c593c5 TM |
5159 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5160 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5161 | } |
5162 | ||
5163 | static void | |
5164 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5165 | { | |
37c593c5 TM |
5166 | if (cstate->minorversion) { |
5167 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5168 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5169 | } | |
5170 | } | |
5171 | ||
5172 | void | |
5173 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5174 | { | |
5175 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5176 | } |
5177 | ||
62cd4a59 TM |
5178 | /* |
5179 | * functions to set current state id | |
5180 | */ | |
9428fe1a TM |
5181 | void |
5182 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5183 | { | |
5184 | put_stateid(cstate, &odp->od_stateid); | |
5185 | } | |
5186 | ||
8b70484c TM |
5187 | void |
5188 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5189 | { | |
5190 | put_stateid(cstate, &open->op_stateid); | |
5191 | } | |
5192 | ||
62cd4a59 TM |
5193 | void |
5194 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5195 | { | |
5196 | put_stateid(cstate, &close->cl_stateid); | |
5197 | } | |
5198 | ||
5199 | void | |
5200 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5201 | { | |
5202 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5203 | } | |
5204 | ||
5205 | /* | |
5206 | * functions to consume current state id | |
5207 | */ | |
1e97b519 | 5208 | |
9428fe1a TM |
5209 | void |
5210 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5211 | { | |
5212 | get_stateid(cstate, &odp->od_stateid); | |
5213 | } | |
5214 | ||
5215 | void | |
5216 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5217 | { | |
5218 | get_stateid(cstate, &drp->dr_stateid); | |
5219 | } | |
5220 | ||
1e97b519 TM |
5221 | void |
5222 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5223 | { | |
5224 | get_stateid(cstate, &fsp->fr_stateid); | |
5225 | } | |
5226 | ||
5227 | void | |
5228 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5229 | { | |
5230 | get_stateid(cstate, &setattr->sa_stateid); | |
5231 | } | |
5232 | ||
8b70484c TM |
5233 | void |
5234 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5235 | { | |
5236 | get_stateid(cstate, &close->cl_stateid); | |
5237 | } | |
5238 | ||
5239 | void | |
62cd4a59 | 5240 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5241 | { |
62cd4a59 | 5242 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5243 | } |
30813e27 TM |
5244 | |
5245 | void | |
5246 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5247 | { | |
5248 | get_stateid(cstate, &read->rd_stateid); | |
5249 | } | |
5250 | ||
5251 | void | |
5252 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5253 | { | |
5254 | get_stateid(cstate, &write->wr_stateid); | |
5255 | } |