Commit | Line | Data |
---|---|---|
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> |
6282cd56 | 44 | #include <linux/hash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 SK |
50 | #include "netns.h" |
51 | ||
1da177e4 LT |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
53 | ||
f32f3c2d BF |
54 | #define all_ones {{~0,~0},~0} |
55 | static const stateid_t one_stateid = { | |
56 | .si_generation = ~0, | |
57 | .si_opaque = all_ones, | |
58 | }; | |
59 | static const stateid_t zero_stateid = { | |
60 | /* all fields zero */ | |
61 | }; | |
19ff0f28 TM |
62 | static const stateid_t currentstateid = { |
63 | .si_generation = 1, | |
64 | }; | |
f32f3c2d | 65 | |
ec6b5d7b | 66 | static u64 current_sessionid = 1; |
fd39ca9a | 67 | |
f32f3c2d BF |
68 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
69 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 70 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
fe0750e5 | 73 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 74 | |
8b671b80 BF |
75 | /* Locking: */ |
76 | ||
77 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 78 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 79 | |
8b671b80 BF |
80 | /* |
81 | * Currently used for the del_recall_lru and file hash table. In an | |
82 | * effort to decrease the scope of the client_mutex, this spinlock may | |
83 | * eventually cover more: | |
84 | */ | |
cdc97505 | 85 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 86 | |
abf1135b CH |
87 | static struct kmem_cache *openowner_slab; |
88 | static struct kmem_cache *lockowner_slab; | |
89 | static struct kmem_cache *file_slab; | |
90 | static struct kmem_cache *stateid_slab; | |
91 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 92 | |
1da177e4 LT |
93 | void |
94 | nfs4_lock_state(void) | |
95 | { | |
353ab6e9 | 96 | mutex_lock(&client_mutex); |
1da177e4 LT |
97 | } |
98 | ||
66b2b9b2 | 99 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 100 | |
f0f51f5c | 101 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 102 | { |
f0f51f5c | 103 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
104 | } |
105 | ||
f0f51f5c | 106 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 107 | { |
f0f51f5c | 108 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
109 | return nfserr_jukebox; |
110 | ses->se_flags |= NFS4_SESSION_DEAD; | |
111 | return nfs_ok; | |
508dc6e1 BH |
112 | } |
113 | ||
1da177e4 LT |
114 | void |
115 | nfs4_unlock_state(void) | |
116 | { | |
353ab6e9 | 117 | mutex_unlock(&client_mutex); |
1da177e4 LT |
118 | } |
119 | ||
221a6876 BF |
120 | static bool is_client_expired(struct nfs4_client *clp) |
121 | { | |
122 | return clp->cl_time == 0; | |
123 | } | |
124 | ||
125 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
126 | { | |
127 | if (atomic_read(&clp->cl_refcount)) | |
128 | return nfserr_jukebox; | |
129 | clp->cl_time = 0; | |
130 | return nfs_ok; | |
131 | } | |
132 | ||
133 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
134 | { | |
135 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
136 | __be32 ret; | |
137 | ||
138 | spin_lock(&nn->client_lock); | |
139 | ret = mark_client_expired_locked(clp); | |
140 | spin_unlock(&nn->client_lock); | |
141 | return ret; | |
142 | } | |
143 | ||
144 | static __be32 get_client_locked(struct nfs4_client *clp) | |
145 | { | |
146 | if (is_client_expired(clp)) | |
147 | return nfserr_expired; | |
148 | atomic_inc(&clp->cl_refcount); | |
149 | return nfs_ok; | |
150 | } | |
151 | ||
152 | /* must be called under the client_lock */ | |
153 | static inline void | |
154 | renew_client_locked(struct nfs4_client *clp) | |
155 | { | |
156 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
157 | ||
158 | if (is_client_expired(clp)) { | |
159 | WARN_ON(1); | |
160 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
161 | __func__, | |
162 | clp->cl_clientid.cl_boot, | |
163 | clp->cl_clientid.cl_id); | |
164 | return; | |
165 | } | |
166 | ||
167 | dprintk("renewing client (clientid %08x/%08x)\n", | |
168 | clp->cl_clientid.cl_boot, | |
169 | clp->cl_clientid.cl_id); | |
170 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
171 | clp->cl_time = get_seconds(); | |
172 | } | |
173 | ||
174 | static inline void | |
175 | renew_client(struct nfs4_client *clp) | |
176 | { | |
177 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
178 | ||
179 | spin_lock(&nn->client_lock); | |
180 | renew_client_locked(clp); | |
181 | spin_unlock(&nn->client_lock); | |
182 | } | |
183 | ||
ba138435 | 184 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
185 | { |
186 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
187 | return; | |
188 | if (!is_client_expired(clp)) | |
189 | renew_client_locked(clp); | |
190 | } | |
191 | ||
d4e19e70 TM |
192 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
193 | { | |
194 | __be32 status; | |
195 | ||
196 | if (is_session_dead(ses)) | |
197 | return nfserr_badsession; | |
198 | status = get_client_locked(ses->se_client); | |
199 | if (status) | |
200 | return status; | |
201 | atomic_inc(&ses->se_ref); | |
202 | return nfs_ok; | |
203 | } | |
204 | ||
205 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
206 | { | |
207 | struct nfs4_client *clp = ses->se_client; | |
208 | ||
209 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
210 | free_session(ses); | |
211 | put_client_renew_locked(clp); | |
212 | } | |
213 | ||
214 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
215 | { | |
216 | struct nfs4_client *clp = ses->se_client; | |
217 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
218 | ||
219 | spin_lock(&nn->client_lock); | |
220 | nfsd4_put_session_locked(ses); | |
221 | spin_unlock(&nn->client_lock); | |
222 | } | |
223 | ||
224 | ||
1da177e4 LT |
225 | static inline u32 |
226 | opaque_hashval(const void *ptr, int nbytes) | |
227 | { | |
228 | unsigned char *cptr = (unsigned char *) ptr; | |
229 | ||
230 | u32 x = 0; | |
231 | while (nbytes--) { | |
232 | x *= 37; | |
233 | x += *cptr++; | |
234 | } | |
235 | return x; | |
236 | } | |
237 | ||
32513b40 BF |
238 | static void nfsd4_free_file(struct nfs4_file *f) |
239 | { | |
240 | kmem_cache_free(file_slab, f); | |
241 | } | |
242 | ||
13cd2184 N |
243 | static inline void |
244 | put_nfs4_file(struct nfs4_file *fi) | |
245 | { | |
cdc97505 | 246 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 247 | hlist_del(&fi->fi_hash); |
cdc97505 | 248 | spin_unlock(&state_lock); |
8b671b80 | 249 | iput(fi->fi_inode); |
32513b40 | 250 | nfsd4_free_file(fi); |
8b671b80 | 251 | } |
13cd2184 N |
252 | } |
253 | ||
254 | static inline void | |
255 | get_nfs4_file(struct nfs4_file *fi) | |
256 | { | |
8b671b80 | 257 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
258 | } |
259 | ||
ef0f3390 | 260 | static int num_delegations; |
697ce9be | 261 | unsigned long max_delegations; |
ef0f3390 N |
262 | |
263 | /* | |
264 | * Open owner state (share locks) | |
265 | */ | |
266 | ||
16bfdaaf BF |
267 | /* hash tables for lock and open owners */ |
268 | #define OWNER_HASH_BITS 8 | |
269 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
270 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 271 | |
16bfdaaf | 272 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
273 | { |
274 | unsigned int ret; | |
275 | ||
276 | ret = opaque_hashval(ownername->data, ownername->len); | |
277 | ret += clientid; | |
16bfdaaf | 278 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 279 | } |
ef0f3390 | 280 | |
ef0f3390 N |
281 | /* hash table for nfs4_file */ |
282 | #define FILE_HASH_BITS 8 | |
283 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 284 | |
ddc04c41 BF |
285 | static unsigned int file_hashval(struct inode *ino) |
286 | { | |
287 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
288 | return hash_ptr(ino, FILE_HASH_BITS); | |
289 | } | |
290 | ||
89876f8c | 291 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 292 | |
3477565e BF |
293 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
294 | { | |
295 | WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
296 | atomic_inc(&fp->fi_access[oflag]); | |
297 | } | |
298 | ||
998db52c BF |
299 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
300 | { | |
301 | if (oflag == O_RDWR) { | |
3477565e BF |
302 | __nfs4_file_get_access(fp, O_RDONLY); |
303 | __nfs4_file_get_access(fp, O_WRONLY); | |
998db52c | 304 | } else |
3477565e | 305 | __nfs4_file_get_access(fp, oflag); |
998db52c BF |
306 | } |
307 | ||
308 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
309 | { |
310 | if (fp->fi_fds[oflag]) { | |
311 | fput(fp->fi_fds[oflag]); | |
312 | fp->fi_fds[oflag] = NULL; | |
313 | } | |
314 | } | |
315 | ||
998db52c | 316 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
317 | { |
318 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 319 | nfs4_file_put_fd(fp, oflag); |
0c7c3e67 | 320 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
3d02fa29 | 321 | nfs4_file_put_fd(fp, O_RDWR); |
f9d7562f BF |
322 | } |
323 | } | |
324 | ||
998db52c BF |
325 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
326 | { | |
327 | if (oflag == O_RDWR) { | |
328 | __nfs4_file_put_access(fp, O_RDONLY); | |
329 | __nfs4_file_put_access(fp, O_WRONLY); | |
330 | } else | |
331 | __nfs4_file_put_access(fp, oflag); | |
332 | } | |
333 | ||
3abdb607 BF |
334 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
335 | kmem_cache *slab) | |
2a74aba7 | 336 | { |
3abdb607 | 337 | struct idr *stateids = &cl->cl_stateids; |
3abdb607 | 338 | struct nfs4_stid *stid; |
6136d2b4 | 339 | int new_id; |
2a74aba7 | 340 | |
3abdb607 BF |
341 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
342 | if (!stid) | |
343 | return NULL; | |
344 | ||
398c33aa | 345 | new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL); |
ebd6c707 | 346 | if (new_id < 0) |
3abdb607 | 347 | goto out_free; |
2a74aba7 | 348 | stid->sc_client = cl; |
3abdb607 BF |
349 | stid->sc_type = 0; |
350 | stid->sc_stateid.si_opaque.so_id = new_id; | |
351 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 352 | /* Will be incremented before return to client: */ |
3abdb607 | 353 | stid->sc_stateid.si_generation = 0; |
996e0938 | 354 | |
996e0938 | 355 | /* |
3abdb607 BF |
356 | * It shouldn't be a problem to reuse an opaque stateid value. |
357 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
358 | * example, a stray write retransmission could be accepted by | |
359 | * the server when it should have been rejected. Therefore, | |
360 | * adopt a trick from the sctp code to attempt to maximize the | |
361 | * amount of time until an id is reused, by ensuring they always | |
362 | * "increase" (mod INT_MAX): | |
996e0938 | 363 | */ |
3abdb607 BF |
364 | return stid; |
365 | out_free: | |
2c44a234 | 366 | kmem_cache_free(slab, stid); |
3abdb607 | 367 | return NULL; |
2a74aba7 BF |
368 | } |
369 | ||
4cdc951b BF |
370 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
371 | { | |
372 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
373 | } | |
374 | ||
6282cd56 N |
375 | /* |
376 | * When we recall a delegation, we should be careful not to hand it | |
377 | * out again straight away. | |
378 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
379 | * in which the filehandles of recalled delegations are "stored". | |
380 | * If a filehandle appear in either filter, a delegation is blocked. | |
381 | * When a delegation is recalled, the filehandle is stored in the "new" | |
382 | * filter. | |
383 | * Every 30 seconds we swap the filters and clear the "new" one, | |
384 | * unless both are empty of course. | |
385 | * | |
386 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
387 | * low 3 bytes as hash-table indices. | |
388 | * | |
389 | * 'state_lock', which is always held when block_delegations() is called, | |
390 | * is used to manage concurrent access. Testing does not need the lock | |
391 | * except when swapping the two filters. | |
392 | */ | |
393 | static struct bloom_pair { | |
394 | int entries, old_entries; | |
395 | time_t swap_time; | |
396 | int new; /* index into 'set' */ | |
397 | DECLARE_BITMAP(set[2], 256); | |
398 | } blocked_delegations; | |
399 | ||
400 | static int delegation_blocked(struct knfsd_fh *fh) | |
401 | { | |
402 | u32 hash; | |
403 | struct bloom_pair *bd = &blocked_delegations; | |
404 | ||
405 | if (bd->entries == 0) | |
406 | return 0; | |
407 | if (seconds_since_boot() - bd->swap_time > 30) { | |
408 | spin_lock(&state_lock); | |
409 | if (seconds_since_boot() - bd->swap_time > 30) { | |
410 | bd->entries -= bd->old_entries; | |
411 | bd->old_entries = bd->entries; | |
412 | memset(bd->set[bd->new], 0, | |
413 | sizeof(bd->set[0])); | |
414 | bd->new = 1-bd->new; | |
415 | bd->swap_time = seconds_since_boot(); | |
416 | } | |
417 | spin_unlock(&state_lock); | |
418 | } | |
419 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
420 | if (test_bit(hash&255, bd->set[0]) && | |
421 | test_bit((hash>>8)&255, bd->set[0]) && | |
422 | test_bit((hash>>16)&255, bd->set[0])) | |
423 | return 1; | |
424 | ||
425 | if (test_bit(hash&255, bd->set[1]) && | |
426 | test_bit((hash>>8)&255, bd->set[1]) && | |
427 | test_bit((hash>>16)&255, bd->set[1])) | |
428 | return 1; | |
429 | ||
430 | return 0; | |
431 | } | |
432 | ||
433 | static void block_delegations(struct knfsd_fh *fh) | |
434 | { | |
435 | u32 hash; | |
436 | struct bloom_pair *bd = &blocked_delegations; | |
437 | ||
438 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
439 | ||
440 | __set_bit(hash&255, bd->set[bd->new]); | |
441 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
442 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
443 | if (bd->entries == 0) | |
444 | bd->swap_time = seconds_since_boot(); | |
445 | bd->entries += 1; | |
446 | } | |
447 | ||
1da177e4 | 448 | static struct nfs4_delegation * |
99c41515 | 449 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh) |
1da177e4 LT |
450 | { |
451 | struct nfs4_delegation *dp; | |
1da177e4 LT |
452 | |
453 | dprintk("NFSD alloc_init_deleg\n"); | |
c2f1a551 | 454 | if (num_delegations > max_delegations) |
ef0f3390 | 455 | return NULL; |
6282cd56 N |
456 | if (delegation_blocked(¤t_fh->fh_handle)) |
457 | return NULL; | |
996e0938 | 458 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 459 | if (dp == NULL) |
1da177e4 | 460 | return dp; |
2a74aba7 BF |
461 | /* |
462 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
463 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
464 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
465 | */ |
466 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 467 | num_delegations++; |
ea1da636 N |
468 | INIT_LIST_HEAD(&dp->dl_perfile); |
469 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 470 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
bf7bd3e9 | 471 | dp->dl_file = NULL; |
99c41515 | 472 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
6c02eaa1 | 473 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
474 | dp->dl_time = 0; |
475 | atomic_set(&dp->dl_count, 1); | |
57725155 | 476 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
477 | return dp; |
478 | } | |
479 | ||
68a33961 | 480 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
481 | { |
482 | struct idr *stateids = &s->sc_client->cl_stateids; | |
483 | ||
484 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
485 | } |
486 | ||
9857df81 BH |
487 | static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s) |
488 | { | |
489 | kmem_cache_free(slab, s); | |
490 | } | |
491 | ||
1da177e4 LT |
492 | void |
493 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
494 | { | |
495 | if (atomic_dec_and_test(&dp->dl_count)) { | |
9857df81 | 496 | nfs4_free_stid(deleg_slab, &dp->dl_stid); |
ef0f3390 | 497 | num_delegations--; |
1da177e4 LT |
498 | } |
499 | } | |
500 | ||
acfdf5c3 | 501 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 502 | { |
cbf7a75b BF |
503 | if (!fp->fi_lease) |
504 | return; | |
acfdf5c3 BF |
505 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
506 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
507 | fp->fi_lease = NULL; | |
4ee63624 | 508 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
509 | fp->fi_deleg_file = NULL; |
510 | } | |
1da177e4 LT |
511 | } |
512 | ||
6136d2b4 BF |
513 | static void unhash_stid(struct nfs4_stid *s) |
514 | { | |
3abdb607 | 515 | s->sc_type = 0; |
6136d2b4 BF |
516 | } |
517 | ||
931ee56c BH |
518 | static void |
519 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
520 | { | |
cdc97505 | 521 | lockdep_assert_held(&state_lock); |
931ee56c | 522 | |
3fb87d13 | 523 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
524 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
525 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
526 | } | |
527 | ||
1da177e4 LT |
528 | /* Called under the state lock. */ |
529 | static void | |
530 | unhash_delegation(struct nfs4_delegation *dp) | |
531 | { | |
cdc97505 | 532 | spin_lock(&state_lock); |
931ee56c | 533 | list_del_init(&dp->dl_perclnt); |
5d926e8c | 534 | list_del_init(&dp->dl_perfile); |
1da177e4 | 535 | list_del_init(&dp->dl_recall_lru); |
cdc97505 | 536 | spin_unlock(&state_lock); |
cbf7a75b BF |
537 | if (dp->dl_file) { |
538 | nfs4_put_deleg_lease(dp->dl_file); | |
539 | put_nfs4_file(dp->dl_file); | |
540 | dp->dl_file = NULL; | |
541 | } | |
3bd64a5b BF |
542 | } |
543 | ||
544 | ||
545 | ||
546 | static void destroy_revoked_delegation(struct nfs4_delegation *dp) | |
547 | { | |
548 | list_del_init(&dp->dl_recall_lru); | |
68a33961 | 549 | remove_stid(&dp->dl_stid); |
1da177e4 LT |
550 | nfs4_put_delegation(dp); |
551 | } | |
552 | ||
3bd64a5b BF |
553 | static void destroy_delegation(struct nfs4_delegation *dp) |
554 | { | |
555 | unhash_delegation(dp); | |
556 | remove_stid(&dp->dl_stid); | |
557 | nfs4_put_delegation(dp); | |
558 | } | |
559 | ||
560 | static void revoke_delegation(struct nfs4_delegation *dp) | |
561 | { | |
562 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
563 | ||
564 | if (clp->cl_minorversion == 0) | |
565 | destroy_delegation(dp); | |
566 | else { | |
567 | unhash_delegation(dp); | |
568 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; | |
569 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
570 | } | |
571 | } | |
572 | ||
1da177e4 LT |
573 | /* |
574 | * SETCLIENTID state | |
575 | */ | |
576 | ||
ddc04c41 BF |
577 | static unsigned int clientid_hashval(u32 id) |
578 | { | |
579 | return id & CLIENT_HASH_MASK; | |
580 | } | |
581 | ||
582 | static unsigned int clientstr_hashval(const char *name) | |
583 | { | |
584 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
585 | } | |
586 | ||
f9d7562f BF |
587 | /* |
588 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
589 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
590 | * only what share bits are currently in force, but also what | |
591 | * combinations of share bits previous opens have used. This allows us | |
592 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
593 | * return an error if the client attempt to downgrade to a combination | |
594 | * of share bits not explicable by closing some of its previous opens. | |
595 | * | |
596 | * XXX: This enforcement is actually incomplete, since we don't keep | |
597 | * track of access/deny bit combinations; so, e.g., we allow: | |
598 | * | |
599 | * OPEN allow read, deny write | |
600 | * OPEN allow both, deny none | |
601 | * DOWNGRADE allow read, deny none | |
602 | * | |
603 | * which we should reject. | |
604 | */ | |
5ae037e5 JL |
605 | static unsigned int |
606 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 607 | int i; |
5ae037e5 | 608 | unsigned int access = 0; |
f9d7562f | 609 | |
f9d7562f BF |
610 | for (i = 1; i < 4; i++) { |
611 | if (test_bit(i, &bmap)) | |
5ae037e5 | 612 | access |= i; |
f9d7562f | 613 | } |
5ae037e5 | 614 | return access; |
f9d7562f BF |
615 | } |
616 | ||
3a328614 | 617 | static bool |
dcef0413 | 618 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
619 | unsigned int access, deny; |
620 | ||
5ae037e5 JL |
621 | access = bmap_to_share_mode(stp->st_access_bmap); |
622 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 623 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
624 | return false; |
625 | return true; | |
f9d7562f BF |
626 | } |
627 | ||
82c5ff1b JL |
628 | /* set share access for a given stateid */ |
629 | static inline void | |
630 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
631 | { | |
632 | __set_bit(access, &stp->st_access_bmap); | |
633 | } | |
634 | ||
635 | /* clear share access for a given stateid */ | |
636 | static inline void | |
637 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
638 | { | |
639 | __clear_bit(access, &stp->st_access_bmap); | |
640 | } | |
641 | ||
642 | /* test whether a given stateid has access */ | |
643 | static inline bool | |
644 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
645 | { | |
646 | return test_bit(access, &stp->st_access_bmap); | |
647 | } | |
648 | ||
ce0fc43c JL |
649 | /* set share deny for a given stateid */ |
650 | static inline void | |
651 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
652 | { | |
653 | __set_bit(access, &stp->st_deny_bmap); | |
654 | } | |
655 | ||
656 | /* clear share deny for a given stateid */ | |
657 | static inline void | |
658 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
659 | { | |
660 | __clear_bit(access, &stp->st_deny_bmap); | |
661 | } | |
662 | ||
663 | /* test whether a given stateid is denying specific access */ | |
664 | static inline bool | |
665 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
666 | { | |
667 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
668 | } |
669 | ||
670 | static int nfs4_access_to_omode(u32 access) | |
671 | { | |
8f34a430 | 672 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
673 | case NFS4_SHARE_ACCESS_READ: |
674 | return O_RDONLY; | |
675 | case NFS4_SHARE_ACCESS_WRITE: | |
676 | return O_WRONLY; | |
677 | case NFS4_SHARE_ACCESS_BOTH: | |
678 | return O_RDWR; | |
679 | } | |
063b0fb9 BF |
680 | WARN_ON_ONCE(1); |
681 | return O_RDONLY; | |
f9d7562f BF |
682 | } |
683 | ||
82c5ff1b JL |
684 | /* release all access and file references for a given stateid */ |
685 | static void | |
686 | release_all_access(struct nfs4_ol_stateid *stp) | |
687 | { | |
688 | int i; | |
689 | ||
690 | for (i = 1; i < 4; i++) { | |
691 | if (test_access(i, stp)) | |
692 | nfs4_file_put_access(stp->st_file, | |
693 | nfs4_access_to_omode(i)); | |
694 | clear_access(i, stp); | |
695 | } | |
696 | } | |
697 | ||
dcef0413 | 698 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 699 | { |
529d7b2a BF |
700 | list_del(&stp->st_perfile); |
701 | list_del(&stp->st_perstateowner); | |
702 | } | |
703 | ||
dcef0413 | 704 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 705 | { |
82c5ff1b | 706 | release_all_access(stp); |
a96e5b90 | 707 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
708 | stp->st_file = NULL; |
709 | } | |
710 | ||
dcef0413 | 711 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 712 | { |
68a33961 | 713 | remove_stid(&stp->st_stid); |
9857df81 | 714 | nfs4_free_stid(stateid_slab, &stp->st_stid); |
529d7b2a BF |
715 | } |
716 | ||
3c87b9b7 | 717 | static void __release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
718 | { |
719 | struct file *file; | |
720 | ||
3c87b9b7 | 721 | list_del(&stp->st_locks); |
529d7b2a | 722 | unhash_generic_stateid(stp); |
6136d2b4 | 723 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
724 | file = find_any_file(stp->st_file); |
725 | if (file) | |
fe0750e5 | 726 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 727 | close_generic_stateid(stp); |
529d7b2a BF |
728 | free_generic_stateid(stp); |
729 | } | |
730 | ||
fe0750e5 | 731 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 732 | { |
dcef0413 | 733 | struct nfs4_ol_stateid *stp; |
529d7b2a | 734 | |
fe0750e5 | 735 | list_del(&lo->lo_owner.so_strhash); |
fe0750e5 BF |
736 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
737 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 738 | struct nfs4_ol_stateid, st_perstateowner); |
3c87b9b7 | 739 | __release_lock_stateid(stp); |
529d7b2a BF |
740 | } |
741 | } | |
742 | ||
50cc6231 TM |
743 | static void nfs4_free_lockowner(struct nfs4_lockowner *lo) |
744 | { | |
745 | kfree(lo->lo_owner.so_owner.data); | |
746 | kmem_cache_free(lockowner_slab, lo); | |
747 | } | |
748 | ||
fe0750e5 | 749 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 750 | { |
fe0750e5 BF |
751 | unhash_lockowner(lo); |
752 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
753 | } |
754 | ||
3c87b9b7 TM |
755 | static void release_lockowner_if_empty(struct nfs4_lockowner *lo) |
756 | { | |
757 | if (list_empty(&lo->lo_owner.so_stateids)) | |
758 | release_lockowner(lo); | |
759 | } | |
760 | ||
761 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
529d7b2a | 762 | { |
fe0750e5 | 763 | struct nfs4_lockowner *lo; |
529d7b2a | 764 | |
3c87b9b7 TM |
765 | lo = lockowner(stp->st_stateowner); |
766 | __release_lock_stateid(stp); | |
767 | release_lockowner_if_empty(lo); | |
768 | } | |
769 | ||
770 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) | |
771 | { | |
772 | struct nfs4_ol_stateid *stp; | |
773 | ||
774 | while (!list_empty(&open_stp->st_locks)) { | |
775 | stp = list_entry(open_stp->st_locks.next, | |
776 | struct nfs4_ol_stateid, st_locks); | |
777 | release_lock_stateid(stp); | |
529d7b2a BF |
778 | } |
779 | } | |
780 | ||
38c387b5 | 781 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
782 | { |
783 | unhash_generic_stateid(stp); | |
3c87b9b7 | 784 | release_open_stateid_locks(stp); |
38c387b5 BF |
785 | close_generic_stateid(stp); |
786 | } | |
787 | ||
788 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
789 | { | |
790 | unhash_open_stateid(stp); | |
2283963f BF |
791 | free_generic_stateid(stp); |
792 | } | |
793 | ||
fe0750e5 | 794 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 795 | { |
dcef0413 | 796 | struct nfs4_ol_stateid *stp; |
f1d110ca | 797 | |
fe0750e5 BF |
798 | list_del(&oo->oo_owner.so_strhash); |
799 | list_del(&oo->oo_perclient); | |
800 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
801 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 802 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 803 | release_open_stateid(stp); |
f1d110ca BF |
804 | } |
805 | } | |
806 | ||
f7a4d872 BF |
807 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
808 | { | |
809 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
810 | ||
811 | if (s) { | |
f7a4d872 BF |
812 | free_generic_stateid(s); |
813 | oo->oo_last_closed_stid = NULL; | |
814 | } | |
815 | } | |
816 | ||
50cc6231 TM |
817 | static void nfs4_free_openowner(struct nfs4_openowner *oo) |
818 | { | |
819 | kfree(oo->oo_owner.so_owner.data); | |
820 | kmem_cache_free(openowner_slab, oo); | |
821 | } | |
822 | ||
fe0750e5 | 823 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 824 | { |
fe0750e5 BF |
825 | unhash_openowner(oo); |
826 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 827 | release_last_closed_stateid(oo); |
fe0750e5 | 828 | nfs4_free_openowner(oo); |
f1d110ca BF |
829 | } |
830 | ||
5282fd72 ME |
831 | static inline int |
832 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
833 | { | |
834 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
835 | ||
836 | return sid->sequence % SESSION_HASH_SIZE; | |
837 | } | |
838 | ||
8f199b82 | 839 | #ifdef NFSD_DEBUG |
5282fd72 ME |
840 | static inline void |
841 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
842 | { | |
843 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
844 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
845 | } | |
8f199b82 TM |
846 | #else |
847 | static inline void | |
848 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
849 | { | |
850 | } | |
851 | #endif | |
852 | ||
9411b1d4 BF |
853 | /* |
854 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
855 | * won't be used for replay. | |
856 | */ | |
857 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
858 | { | |
859 | struct nfs4_stateowner *so = cstate->replay_owner; | |
860 | ||
861 | if (nfserr == nfserr_replay_me) | |
862 | return; | |
863 | ||
864 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
865 | cstate->replay_owner = NULL; | |
866 | return; | |
867 | } | |
868 | if (!so) | |
869 | return; | |
870 | if (so->so_is_open_owner) | |
871 | release_last_closed_stateid(openowner(so)); | |
872 | so->so_seqid++; | |
873 | return; | |
874 | } | |
5282fd72 | 875 | |
ec6b5d7b AA |
876 | static void |
877 | gen_sessionid(struct nfsd4_session *ses) | |
878 | { | |
879 | struct nfs4_client *clp = ses->se_client; | |
880 | struct nfsd4_sessionid *sid; | |
881 | ||
882 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
883 | sid->clientid = clp->cl_clientid; | |
884 | sid->sequence = current_sessionid++; | |
885 | sid->reserved = 0; | |
886 | } | |
887 | ||
888 | /* | |
a649637c AA |
889 | * The protocol defines ca_maxresponssize_cached to include the size of |
890 | * the rpc header, but all we need to cache is the data starting after | |
891 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
892 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
893 | * value that is the number of bytes in our cache plus a few additional | |
894 | * bytes. In order to stay on the safe side, and not promise more than | |
895 | * we can cache, those additional bytes must be the minimum possible: 24 | |
896 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
897 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
898 | * for the SEQUENCE op response: | |
899 | */ | |
900 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
901 | ||
557ce264 AA |
902 | static void |
903 | free_session_slots(struct nfsd4_session *ses) | |
904 | { | |
905 | int i; | |
906 | ||
907 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
908 | kfree(ses->se_slots[i]); | |
909 | } | |
910 | ||
a649637c | 911 | /* |
efe0cb6d BF |
912 | * We don't actually need to cache the rpc and session headers, so we |
913 | * can allocate a little less for each slot: | |
914 | */ | |
55c760cf | 915 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 916 | { |
55c760cf | 917 | u32 size; |
efe0cb6d | 918 | |
55c760cf BF |
919 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
920 | size = 0; | |
921 | else | |
922 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
923 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 924 | } |
ec6b5d7b | 925 | |
5b6feee9 BF |
926 | /* |
927 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 928 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 929 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 930 | */ |
55c760cf | 931 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 932 | { |
55c760cf BF |
933 | u32 slotsize = slot_bytes(ca); |
934 | u32 num = ca->maxreqs; | |
5b6feee9 | 935 | int avail; |
ec6b5d7b | 936 | |
5b6feee9 | 937 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
938 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
939 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
940 | num = min_t(int, num, avail / slotsize); |
941 | nfsd_drc_mem_used += num * slotsize; | |
942 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 943 | |
5b6feee9 BF |
944 | return num; |
945 | } | |
ec6b5d7b | 946 | |
55c760cf | 947 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 948 | { |
55c760cf BF |
949 | int slotsize = slot_bytes(ca); |
950 | ||
4bd9b0f4 | 951 | spin_lock(&nfsd_drc_lock); |
55c760cf | 952 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 953 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 954 | } |
ec6b5d7b | 955 | |
60810e54 KM |
956 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
957 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 958 | { |
60810e54 KM |
959 | int numslots = fattrs->maxreqs; |
960 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
961 | struct nfsd4_session *new; |
962 | int mem, i; | |
a649637c | 963 | |
5b6feee9 BF |
964 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
965 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
966 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 967 | |
5b6feee9 BF |
968 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
969 | if (!new) | |
970 | return NULL; | |
557ce264 | 971 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 972 | for (i = 0; i < numslots; i++) { |
55c760cf | 973 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 974 | if (!new->se_slots[i]) |
557ce264 | 975 | goto out_free; |
557ce264 | 976 | } |
60810e54 KM |
977 | |
978 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
979 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
980 | ||
5b6feee9 BF |
981 | return new; |
982 | out_free: | |
983 | while (i--) | |
984 | kfree(new->se_slots[i]); | |
985 | kfree(new); | |
986 | return NULL; | |
ec6b5d7b AA |
987 | } |
988 | ||
19cf5c02 BF |
989 | static void free_conn(struct nfsd4_conn *c) |
990 | { | |
991 | svc_xprt_put(c->cn_xprt); | |
992 | kfree(c); | |
993 | } | |
ec6b5d7b | 994 | |
19cf5c02 BF |
995 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
996 | { | |
997 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
998 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 999 | |
19cf5c02 BF |
1000 | spin_lock(&clp->cl_lock); |
1001 | if (!list_empty(&c->cn_persession)) { | |
1002 | list_del(&c->cn_persession); | |
1003 | free_conn(c); | |
1004 | } | |
eea49806 | 1005 | nfsd4_probe_callback(clp); |
2e4b7239 | 1006 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1007 | } |
ec6b5d7b | 1008 | |
d29c374c | 1009 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1010 | { |
c7662518 | 1011 | struct nfsd4_conn *conn; |
ec6b5d7b | 1012 | |
c7662518 BF |
1013 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1014 | if (!conn) | |
db90681d | 1015 | return NULL; |
c7662518 BF |
1016 | svc_xprt_get(rqstp->rq_xprt); |
1017 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1018 | conn->cn_flags = flags; |
db90681d BF |
1019 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1020 | return conn; | |
1021 | } | |
a649637c | 1022 | |
328ead28 BF |
1023 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1024 | { | |
1025 | conn->cn_session = ses; | |
1026 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1027 | } |
1028 | ||
db90681d | 1029 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1030 | { |
db90681d | 1031 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1032 | |
c7662518 | 1033 | spin_lock(&clp->cl_lock); |
328ead28 | 1034 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1035 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1036 | } |
1037 | ||
21b75b01 | 1038 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1039 | { |
19cf5c02 | 1040 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1041 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1042 | } |
1043 | ||
e1ff371f | 1044 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1045 | { |
21b75b01 | 1046 | int ret; |
ec6b5d7b | 1047 | |
db90681d | 1048 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1049 | ret = nfsd4_register_conn(conn); |
1050 | if (ret) | |
1051 | /* oops; xprt is already down: */ | |
1052 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 1053 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
1054 | /* callback channel may be back up */ |
1055 | nfsd4_probe_callback(ses->se_client); | |
1056 | } | |
c7662518 | 1057 | } |
ec6b5d7b | 1058 | |
e1ff371f | 1059 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1060 | { |
1061 | u32 dir = NFS4_CDFC4_FORE; | |
1062 | ||
e1ff371f | 1063 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1064 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1065 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1066 | } |
1067 | ||
1068 | /* must be called under client_lock */ | |
19cf5c02 | 1069 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1070 | { |
19cf5c02 BF |
1071 | struct nfs4_client *clp = s->se_client; |
1072 | struct nfsd4_conn *c; | |
ec6b5d7b | 1073 | |
19cf5c02 BF |
1074 | spin_lock(&clp->cl_lock); |
1075 | while (!list_empty(&s->se_conns)) { | |
1076 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1077 | list_del_init(&c->cn_persession); | |
1078 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1079 | |
19cf5c02 BF |
1080 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1081 | free_conn(c); | |
ec6b5d7b | 1082 | |
19cf5c02 BF |
1083 | spin_lock(&clp->cl_lock); |
1084 | } | |
1085 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1086 | } |
ec6b5d7b | 1087 | |
1377b69e BF |
1088 | static void __free_session(struct nfsd4_session *ses) |
1089 | { | |
1377b69e BF |
1090 | free_session_slots(ses); |
1091 | kfree(ses); | |
1092 | } | |
1093 | ||
66b2b9b2 | 1094 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1095 | { |
66b2b9b2 | 1096 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
1097 | |
1098 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 1099 | nfsd4_del_conns(ses); |
55c760cf | 1100 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1101 | __free_session(ses); |
c7662518 BF |
1102 | } |
1103 | ||
135ae827 | 1104 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1105 | { |
a827bcb2 | 1106 | int idx; |
1872de0e | 1107 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1108 | |
ec6b5d7b AA |
1109 | new->se_client = clp; |
1110 | gen_sessionid(new); | |
ec6b5d7b | 1111 | |
c7662518 BF |
1112 | INIT_LIST_HEAD(&new->se_conns); |
1113 | ||
ac7c46f2 | 1114 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1115 | new->se_flags = cses->flags; |
8b5ce5cd | 1116 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1117 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1118 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1119 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1120 | spin_lock(&nn->client_lock); |
1872de0e | 1121 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1122 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1123 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1124 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1125 | spin_unlock(&nn->client_lock); |
60810e54 | 1126 | |
dcbeaa68 | 1127 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1128 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1129 | /* |
1130 | * This is a little silly; with sessions there's no real | |
1131 | * use for the callback address. Use the peer address | |
1132 | * as a reasonable default for now, but consider fixing | |
1133 | * the rpc client not to require an address in the | |
1134 | * future: | |
1135 | */ | |
edd76786 BF |
1136 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1137 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1138 | } |
ec6b5d7b AA |
1139 | } |
1140 | ||
9089f1b4 | 1141 | /* caller must hold client_lock */ |
5282fd72 | 1142 | static struct nfsd4_session * |
d4e19e70 | 1143 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1144 | { |
1145 | struct nfsd4_session *elem; | |
1146 | int idx; | |
1872de0e | 1147 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1148 | |
1149 | dump_sessionid(__func__, sessionid); | |
1150 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1151 | /* Search in the appropriate list */ |
1872de0e | 1152 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1153 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1154 | NFS4_MAX_SESSIONID_LEN)) { | |
1155 | return elem; | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | dprintk("%s: session not found\n", __func__); | |
1160 | return NULL; | |
1161 | } | |
1162 | ||
d4e19e70 TM |
1163 | static struct nfsd4_session * |
1164 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1165 | __be32 *ret) | |
1166 | { | |
1167 | struct nfsd4_session *session; | |
1168 | __be32 status = nfserr_badsession; | |
1169 | ||
1170 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1171 | if (!session) | |
1172 | goto out; | |
1173 | status = nfsd4_get_session_locked(session); | |
1174 | if (status) | |
1175 | session = NULL; | |
1176 | out: | |
1177 | *ret = status; | |
1178 | return session; | |
1179 | } | |
1180 | ||
9089f1b4 | 1181 | /* caller must hold client_lock */ |
7116ed6b | 1182 | static void |
5282fd72 | 1183 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1184 | { |
1185 | list_del(&ses->se_hash); | |
4c649378 | 1186 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1187 | list_del(&ses->se_perclnt); |
4c649378 | 1188 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1189 | } |
1190 | ||
1da177e4 LT |
1191 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1192 | static int | |
2c142baa | 1193 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1194 | { |
2c142baa | 1195 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1196 | return 0; |
60adfc50 | 1197 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1198 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1199 | return 1; |
1200 | } | |
1201 | ||
1202 | /* | |
1203 | * XXX Should we use a slab cache ? | |
1204 | * This type of memory management is somewhat inefficient, but we use it | |
1205 | * anyway since SETCLIENTID is not a common operation. | |
1206 | */ | |
35bba9a3 | 1207 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1208 | { |
1209 | struct nfs4_client *clp; | |
1210 | ||
35bba9a3 BF |
1211 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1212 | if (clp == NULL) | |
1213 | return NULL; | |
67114fe6 | 1214 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1215 | if (clp->cl_name.data == NULL) { |
1216 | kfree(clp); | |
1217 | return NULL; | |
1da177e4 | 1218 | } |
35bba9a3 | 1219 | clp->cl_name.len = name.len; |
5694c93e TM |
1220 | INIT_LIST_HEAD(&clp->cl_sessions); |
1221 | idr_init(&clp->cl_stateids); | |
1222 | atomic_set(&clp->cl_refcount, 0); | |
1223 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1224 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1225 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1226 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1227 | INIT_LIST_HEAD(&clp->cl_lru); | |
1228 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1229 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1230 | spin_lock_init(&clp->cl_lock); | |
1231 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 LT |
1232 | return clp; |
1233 | } | |
1234 | ||
4dd86e15 | 1235 | static void |
1da177e4 LT |
1236 | free_client(struct nfs4_client *clp) |
1237 | { | |
bca0ec65 | 1238 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1239 | |
1240 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1241 | while (!list_empty(&clp->cl_sessions)) { |
1242 | struct nfsd4_session *ses; | |
1243 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1244 | se_perclnt); | |
1245 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1246 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1247 | free_session(ses); | |
792c95dd | 1248 | } |
4cb57e30 | 1249 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1250 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1251 | kfree(clp->cl_name.data); |
2d32b29a | 1252 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1253 | kfree(clp); |
1254 | } | |
1255 | ||
84d38ac9 BH |
1256 | /* must be called under the client_lock */ |
1257 | static inline void | |
1258 | unhash_client_locked(struct nfs4_client *clp) | |
1259 | { | |
792c95dd BF |
1260 | struct nfsd4_session *ses; |
1261 | ||
84d38ac9 | 1262 | list_del(&clp->cl_lru); |
4c649378 | 1263 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1264 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1265 | list_del_init(&ses->se_hash); | |
4c649378 | 1266 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1267 | } |
1268 | ||
1da177e4 | 1269 | static void |
0d22f68f | 1270 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1271 | { |
fe0750e5 | 1272 | struct nfs4_openowner *oo; |
1da177e4 | 1273 | struct nfs4_delegation *dp; |
1da177e4 | 1274 | struct list_head reaplist; |
382a62e7 | 1275 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1276 | |
1da177e4 | 1277 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1278 | spin_lock(&state_lock); |
ea1da636 N |
1279 | while (!list_empty(&clp->cl_delegations)) { |
1280 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1281 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1282 | list_move(&dp->dl_recall_lru, &reaplist); |
1283 | } | |
cdc97505 | 1284 | spin_unlock(&state_lock); |
1da177e4 LT |
1285 | while (!list_empty(&reaplist)) { |
1286 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 1287 | destroy_delegation(dp); |
1da177e4 | 1288 | } |
956c4fee BH |
1289 | list_splice_init(&clp->cl_revoked, &reaplist); |
1290 | while (!list_empty(&reaplist)) { | |
1291 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1292 | destroy_revoked_delegation(dp); | |
1293 | } | |
ea1da636 | 1294 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1295 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1296 | release_openowner(oo); | |
1da177e4 | 1297 | } |
6ff8da08 | 1298 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1299 | if (clp->cl_cb_conn.cb_xprt) |
1300 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1301 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1302 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1303 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1304 | else |
a99454aa | 1305 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1306 | spin_lock(&nn->client_lock); |
84d38ac9 | 1307 | unhash_client_locked(clp); |
221a6876 BF |
1308 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1309 | free_client(clp); | |
c9a49628 | 1310 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1311 | } |
1312 | ||
0d22f68f BF |
1313 | static void expire_client(struct nfs4_client *clp) |
1314 | { | |
1315 | nfsd4_client_record_remove(clp); | |
1316 | destroy_client(clp); | |
1317 | } | |
1318 | ||
35bba9a3 BF |
1319 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1320 | { | |
1321 | memcpy(target->cl_verifier.data, source->data, | |
1322 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1323 | } |
1324 | ||
35bba9a3 BF |
1325 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1326 | { | |
1da177e4 LT |
1327 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1328 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1329 | } | |
1330 | ||
03a4e1f6 | 1331 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1332 | { |
03a4e1f6 BF |
1333 | if (source->cr_principal) { |
1334 | target->cr_principal = | |
1335 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1336 | if (target->cr_principal == NULL) | |
1337 | return -ENOMEM; | |
1338 | } else | |
1339 | target->cr_principal = NULL; | |
d5497fc6 | 1340 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1341 | target->cr_uid = source->cr_uid; |
1342 | target->cr_gid = source->cr_gid; | |
1343 | target->cr_group_info = source->cr_group_info; | |
1344 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1345 | target->cr_gss_mech = source->cr_gss_mech; |
1346 | if (source->cr_gss_mech) | |
1347 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1348 | return 0; |
1da177e4 LT |
1349 | } |
1350 | ||
ac55fdc4 JL |
1351 | static long long |
1352 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1353 | { | |
1354 | long long res; | |
1355 | ||
1356 | res = o1->len - o2->len; | |
1357 | if (res) | |
1358 | return res; | |
1359 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1360 | } | |
1361 | ||
35bba9a3 | 1362 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1363 | { |
a55370a3 | 1364 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1365 | } |
1366 | ||
1367 | static int | |
599e0a22 BF |
1368 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1369 | { | |
1370 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1371 | } |
1372 | ||
1373 | static int | |
599e0a22 BF |
1374 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1375 | { | |
1376 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1377 | } |
1378 | ||
8fbba96e BF |
1379 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1380 | { | |
1381 | int i; | |
1382 | ||
1383 | if (g1->ngroups != g2->ngroups) | |
1384 | return false; | |
1385 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1386 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1387 | return false; |
1388 | return true; | |
1389 | } | |
1390 | ||
68eb3508 BF |
1391 | /* |
1392 | * RFC 3530 language requires clid_inuse be returned when the | |
1393 | * "principal" associated with a requests differs from that previously | |
1394 | * used. We use uid, gid's, and gss principal string as our best | |
1395 | * approximation. We also don't want to allow non-gss use of a client | |
1396 | * established using gss: in theory cr_principal should catch that | |
1397 | * change, but in practice cr_principal can be null even in the gss case | |
1398 | * since gssd doesn't always pass down a principal string. | |
1399 | */ | |
1400 | static bool is_gss_cred(struct svc_cred *cr) | |
1401 | { | |
1402 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1403 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1404 | } | |
1405 | ||
1406 | ||
5559b50a | 1407 | static bool |
599e0a22 BF |
1408 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1409 | { | |
68eb3508 | 1410 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1411 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1412 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1413 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1414 | return false; | |
1415 | if (cr1->cr_principal == cr2->cr_principal) | |
1416 | return true; | |
1417 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1418 | return false; | |
5559b50a | 1419 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1420 | } |
1421 | ||
57266a6e BF |
1422 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1423 | { | |
1424 | struct svc_cred *cr = &rqstp->rq_cred; | |
1425 | u32 service; | |
1426 | ||
c4720591 BF |
1427 | if (!cr->cr_gss_mech) |
1428 | return false; | |
57266a6e BF |
1429 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1430 | return service == RPC_GSS_SVC_INTEGRITY || | |
1431 | service == RPC_GSS_SVC_PRIVACY; | |
1432 | } | |
1433 | ||
1434 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1435 | { | |
1436 | struct svc_cred *cr = &rqstp->rq_cred; | |
1437 | ||
1438 | if (!cl->cl_mach_cred) | |
1439 | return true; | |
1440 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1441 | return false; | |
1442 | if (!svc_rqst_integrity_protected(rqstp)) | |
1443 | return false; | |
1444 | if (!cr->cr_principal) | |
1445 | return false; | |
1446 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1447 | } | |
1448 | ||
c212cecf | 1449 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1450 | { |
1451 | static u32 current_clientid = 1; | |
1452 | ||
2c142baa | 1453 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1454 | clp->cl_clientid.cl_id = current_clientid++; |
1455 | } | |
1456 | ||
deda2faa BF |
1457 | static void gen_confirm(struct nfs4_client *clp) |
1458 | { | |
ab4684d1 | 1459 | __be32 verf[2]; |
deda2faa | 1460 | static u32 i; |
1da177e4 | 1461 | |
f419992c JL |
1462 | /* |
1463 | * This is opaque to client, so no need to byte-swap. Use | |
1464 | * __force to keep sparse happy | |
1465 | */ | |
1466 | verf[0] = (__force __be32)get_seconds(); | |
1467 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1468 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1469 | } |
1470 | ||
38c2f4b1 | 1471 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1472 | { |
3abdb607 BF |
1473 | struct nfs4_stid *ret; |
1474 | ||
1475 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1476 | if (!ret || !ret->sc_type) | |
1477 | return NULL; | |
1478 | return ret; | |
4d71ab87 BF |
1479 | } |
1480 | ||
38c2f4b1 | 1481 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1482 | { |
1483 | struct nfs4_stid *s; | |
4d71ab87 | 1484 | |
38c2f4b1 | 1485 | s = find_stateid(cl, t); |
4d71ab87 BF |
1486 | if (!s) |
1487 | return NULL; | |
f459e453 | 1488 | if (typemask & s->sc_type) |
4581d140 | 1489 | return s; |
4581d140 BF |
1490 | return NULL; |
1491 | } | |
1492 | ||
2216d449 | 1493 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1494 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1495 | { | |
1496 | struct nfs4_client *clp; | |
1497 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1498 | int ret; |
c212cecf | 1499 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1500 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1501 | |
1502 | clp = alloc_client(name); | |
1503 | if (clp == NULL) | |
1504 | return NULL; | |
1505 | ||
03a4e1f6 BF |
1506 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1507 | if (ret) { | |
c9a49628 | 1508 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1509 | free_client(clp); |
c9a49628 | 1510 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1511 | return NULL; |
b09333c4 | 1512 | } |
57725155 | 1513 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1514 | clp->cl_time = get_seconds(); |
b09333c4 | 1515 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1516 | copy_verf(clp, verf); |
1517 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1518 | gen_confirm(clp); |
edd76786 | 1519 | clp->cl_cb_session = NULL; |
c212cecf | 1520 | clp->net = net; |
b09333c4 RL |
1521 | return clp; |
1522 | } | |
1523 | ||
fd39ca9a | 1524 | static void |
ac55fdc4 JL |
1525 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1526 | { | |
1527 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1528 | struct nfs4_client *clp; | |
1529 | ||
1530 | while (*new) { | |
1531 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1532 | parent = *new; | |
1533 | ||
1534 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1535 | new = &((*new)->rb_left); | |
1536 | else | |
1537 | new = &((*new)->rb_right); | |
1538 | } | |
1539 | ||
1540 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1541 | rb_insert_color(&new_clp->cl_namenode, root); | |
1542 | } | |
1543 | ||
1544 | static struct nfs4_client * | |
1545 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1546 | { | |
1547 | long long cmp; | |
1548 | struct rb_node *node = root->rb_node; | |
1549 | struct nfs4_client *clp; | |
1550 | ||
1551 | while (node) { | |
1552 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1553 | cmp = compare_blob(&clp->cl_name, name); | |
1554 | if (cmp > 0) | |
1555 | node = node->rb_left; | |
1556 | else if (cmp < 0) | |
1557 | node = node->rb_right; | |
1558 | else | |
1559 | return clp; | |
1560 | } | |
1561 | return NULL; | |
1562 | } | |
1563 | ||
1564 | static void | |
1565 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1566 | { |
1567 | unsigned int idhashval; | |
0a7ec377 | 1568 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1569 | |
ac55fdc4 | 1570 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1571 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1572 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1573 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1574 | renew_client(clp); |
1da177e4 LT |
1575 | } |
1576 | ||
fd39ca9a | 1577 | static void |
1da177e4 LT |
1578 | move_to_confirmed(struct nfs4_client *clp) |
1579 | { | |
1580 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1581 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1582 | |
1583 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1584 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1585 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1586 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1587 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1588 | renew_client(clp); |
1589 | } | |
1590 | ||
1591 | static struct nfs4_client * | |
bfa85e83 | 1592 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1593 | { |
1594 | struct nfs4_client *clp; | |
1595 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1596 | ||
bfa85e83 | 1597 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1598 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1599 | if ((bool)clp->cl_minorversion != sessions) |
1600 | return NULL; | |
a50d2ad1 | 1601 | renew_client(clp); |
1da177e4 | 1602 | return clp; |
a50d2ad1 | 1603 | } |
1da177e4 LT |
1604 | } |
1605 | return NULL; | |
1606 | } | |
1607 | ||
bfa85e83 BF |
1608 | static struct nfs4_client * |
1609 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1610 | { | |
1611 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1612 | ||
1613 | return find_client_in_id_table(tbl, clid, sessions); | |
1614 | } | |
1615 | ||
1da177e4 | 1616 | static struct nfs4_client * |
0a7ec377 | 1617 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1618 | { |
bfa85e83 | 1619 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1620 | |
bfa85e83 | 1621 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1622 | } |
1623 | ||
6e5f15c9 | 1624 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1625 | { |
6e5f15c9 | 1626 | return clp->cl_exchange_flags != 0; |
e203d506 | 1627 | } |
a1bcecd2 | 1628 | |
28ce6054 | 1629 | static struct nfs4_client * |
382a62e7 | 1630 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1631 | { |
382a62e7 | 1632 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1633 | } |
1634 | ||
1635 | static struct nfs4_client * | |
a99454aa | 1636 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1637 | { |
a99454aa | 1638 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1639 | } |
1640 | ||
fd39ca9a | 1641 | static void |
6f3d772f | 1642 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1643 | { |
07263f1e | 1644 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1645 | struct sockaddr *sa = svc_addr(rqstp); |
1646 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1647 | unsigned short expected_family; |
1648 | ||
1649 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1650 | if (se->se_callback_netid_len == 3 && | |
1651 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1652 | expected_family = AF_INET; | |
1653 | else if (se->se_callback_netid_len == 4 && | |
1654 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1655 | expected_family = AF_INET6; | |
1656 | else | |
1da177e4 LT |
1657 | goto out_err; |
1658 | ||
c212cecf | 1659 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1660 | se->se_callback_addr_len, |
07263f1e BF |
1661 | (struct sockaddr *)&conn->cb_addr, |
1662 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1663 | |
07263f1e | 1664 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1665 | goto out_err; |
aa9a4ec7 | 1666 | |
07263f1e BF |
1667 | if (conn->cb_addr.ss_family == AF_INET6) |
1668 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1669 | |
07263f1e BF |
1670 | conn->cb_prog = se->se_callback_prog; |
1671 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1672 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1673 | return; |
1674 | out_err: | |
07263f1e BF |
1675 | conn->cb_addr.ss_family = AF_UNSPEC; |
1676 | conn->cb_addrlen = 0; | |
849823c5 | 1677 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1678 | "will not receive delegations\n", |
1679 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1680 | ||
1da177e4 LT |
1681 | return; |
1682 | } | |
1683 | ||
074fe897 | 1684 | /* |
067e1ace | 1685 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 1686 | */ |
b607664e | 1687 | static void |
074fe897 | 1688 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 1689 | { |
f5236013 | 1690 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
1691 | struct nfsd4_slot *slot = resp->cstate.slot; |
1692 | unsigned int base; | |
074fe897 | 1693 | |
557ce264 | 1694 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1695 | |
557ce264 AA |
1696 | slot->sl_opcnt = resp->opcnt; |
1697 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1698 | |
bf5c43c8 | 1699 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1700 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1701 | slot->sl_datalen = 0; |
bf864a31 | 1702 | return; |
074fe897 | 1703 | } |
f5236013 BF |
1704 | base = resp->cstate.data_offset; |
1705 | slot->sl_datalen = buf->len - base; | |
1706 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
1707 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
1708 | return; | |
074fe897 AA |
1709 | } |
1710 | ||
1711 | /* | |
abfabf8c AA |
1712 | * Encode the replay sequence operation from the slot values. |
1713 | * If cachethis is FALSE encode the uncached rep error on the next | |
1714 | * operation which sets resp->p and increments resp->opcnt for | |
1715 | * nfs4svc_encode_compoundres. | |
074fe897 | 1716 | * |
074fe897 | 1717 | */ |
abfabf8c AA |
1718 | static __be32 |
1719 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1720 | struct nfsd4_compoundres *resp) | |
074fe897 | 1721 | { |
abfabf8c AA |
1722 | struct nfsd4_op *op; |
1723 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1724 | |
abfabf8c AA |
1725 | /* Encode the replayed sequence operation */ |
1726 | op = &args->ops[resp->opcnt - 1]; | |
1727 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1728 | |
abfabf8c | 1729 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1730 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1731 | op = &args->ops[resp->opcnt++]; |
1732 | op->status = nfserr_retry_uncached_rep; | |
1733 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1734 | } |
abfabf8c | 1735 | return op->status; |
074fe897 AA |
1736 | } |
1737 | ||
1738 | /* | |
557ce264 AA |
1739 | * The sequence operation is not cached because we can use the slot and |
1740 | * session values. | |
074fe897 | 1741 | */ |
3ca2eb98 | 1742 | static __be32 |
bf864a31 AA |
1743 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1744 | struct nfsd4_sequence *seq) | |
074fe897 | 1745 | { |
557ce264 | 1746 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
1747 | struct xdr_stream *xdr = &resp->xdr; |
1748 | __be32 *p; | |
074fe897 AA |
1749 | __be32 status; |
1750 | ||
557ce264 | 1751 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1752 | |
abfabf8c | 1753 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 1754 | if (status) |
abfabf8c | 1755 | return status; |
074fe897 | 1756 | |
f5236013 BF |
1757 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
1758 | if (!p) { | |
1759 | WARN_ON_ONCE(1); | |
1760 | return nfserr_serverfault; | |
1761 | } | |
1762 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
1763 | xdr_commit_encode(xdr); | |
074fe897 | 1764 | |
557ce264 | 1765 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 1766 | return slot->sl_status; |
074fe897 AA |
1767 | } |
1768 | ||
0733d213 AA |
1769 | /* |
1770 | * Set the exchange_id flags returned by the server. | |
1771 | */ | |
1772 | static void | |
1773 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1774 | { | |
1775 | /* pNFS is not supported */ | |
1776 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1777 | ||
1778 | /* Referrals are supported, Migration is not. */ | |
1779 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1780 | ||
1781 | /* set the wire flags to return to client. */ | |
1782 | clid->flags = new->cl_exchange_flags; | |
1783 | } | |
1784 | ||
631fc9ea BF |
1785 | static bool client_has_state(struct nfs4_client *clp) |
1786 | { | |
1787 | /* | |
1788 | * Note clp->cl_openowners check isn't quite right: there's no | |
1789 | * need to count owners without stateid's. | |
1790 | * | |
1791 | * Also note we should probably be using this in 4.0 case too. | |
1792 | */ | |
6eccece9 BF |
1793 | return !list_empty(&clp->cl_openowners) |
1794 | || !list_empty(&clp->cl_delegations) | |
1795 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1796 | } |
1797 | ||
069b6ad4 AA |
1798 | __be32 |
1799 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1800 | struct nfsd4_compound_state *cstate, | |
1801 | struct nfsd4_exchange_id *exid) | |
1802 | { | |
0733d213 | 1803 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1804 | __be32 status; |
363168b4 | 1805 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1806 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1807 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1808 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1809 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1810 | |
363168b4 | 1811 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1812 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1813 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1814 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1815 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1816 | |
a084daf5 | 1817 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1818 | return nfserr_inval; |
1819 | ||
0733d213 | 1820 | switch (exid->spa_how) { |
57266a6e BF |
1821 | case SP4_MACH_CRED: |
1822 | if (!svc_rqst_integrity_protected(rqstp)) | |
1823 | return nfserr_inval; | |
0733d213 AA |
1824 | case SP4_NONE: |
1825 | break; | |
063b0fb9 BF |
1826 | default: /* checked by xdr code */ |
1827 | WARN_ON_ONCE(1); | |
0733d213 | 1828 | case SP4_SSV: |
dd30333c | 1829 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
1830 | } |
1831 | ||
2dbb269d | 1832 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1833 | nfs4_lock_state(); |
382a62e7 | 1834 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1835 | if (conf) { |
83e08fd4 BF |
1836 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1837 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1838 | ||
136e658d BF |
1839 | if (update) { |
1840 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1841 | status = nfserr_inval; |
1a308118 BF |
1842 | goto out; |
1843 | } | |
57266a6e BF |
1844 | if (!mach_creds_match(conf, rqstp)) { |
1845 | status = nfserr_wrong_cred; | |
1846 | goto out; | |
1847 | } | |
136e658d | 1848 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1849 | status = nfserr_perm; |
136e658d BF |
1850 | goto out; |
1851 | } | |
1852 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1853 | status = nfserr_not_same; |
1854 | goto out; | |
1855 | } | |
136e658d BF |
1856 | /* case 6 */ |
1857 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1858 | new = conf; | |
1859 | goto out_copy; | |
0733d213 | 1860 | } |
136e658d | 1861 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1862 | if (client_has_state(conf)) { |
1863 | status = nfserr_clid_inuse; | |
0733d213 AA |
1864 | goto out; |
1865 | } | |
1866 | expire_client(conf); | |
1867 | goto out_new; | |
1868 | } | |
136e658d | 1869 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1870 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1871 | new = conf; |
1872 | goto out_copy; | |
1873 | } | |
1874 | /* case 5, client reboot */ | |
136e658d | 1875 | goto out_new; |
6ddbbbfe MS |
1876 | } |
1877 | ||
2dbb269d | 1878 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1879 | status = nfserr_noent; |
1880 | goto out; | |
0733d213 AA |
1881 | } |
1882 | ||
a99454aa | 1883 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1884 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1885 | expire_client(unconf); |
0733d213 | 1886 | |
2dbb269d | 1887 | /* case 1 (normal case) */ |
0733d213 | 1888 | out_new: |
2216d449 | 1889 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1890 | if (new == NULL) { |
4731030d | 1891 | status = nfserr_jukebox; |
0733d213 AA |
1892 | goto out; |
1893 | } | |
4f540e29 | 1894 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 1895 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 1896 | |
c212cecf | 1897 | gen_clid(new, nn); |
ac55fdc4 | 1898 | add_to_unconfirmed(new); |
0733d213 AA |
1899 | out_copy: |
1900 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1901 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1902 | ||
778df3f0 | 1903 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1904 | nfsd4_set_ex_flags(new, exid); |
1905 | ||
1906 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1907 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1908 | status = nfs_ok; |
1909 | ||
1910 | out: | |
1911 | nfs4_unlock_state(); | |
0733d213 | 1912 | return status; |
069b6ad4 AA |
1913 | } |
1914 | ||
57b7b43b | 1915 | static __be32 |
88e588d5 | 1916 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1917 | { |
88e588d5 AA |
1918 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1919 | slot_seqid); | |
b85d4c01 BH |
1920 | |
1921 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1922 | if (slot_inuse) { |
1923 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1924 | return nfserr_jukebox; |
1925 | else | |
1926 | return nfserr_seq_misordered; | |
1927 | } | |
f6d82485 | 1928 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1929 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1930 | return nfs_ok; |
88e588d5 | 1931 | if (seqid == slot_seqid) |
b85d4c01 | 1932 | return nfserr_replay_cache; |
b85d4c01 BH |
1933 | return nfserr_seq_misordered; |
1934 | } | |
1935 | ||
49557cc7 AA |
1936 | /* |
1937 | * Cache the create session result into the create session single DRC | |
1938 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1939 | * Do this for solo or embedded create session operations. | |
1940 | */ | |
1941 | static void | |
1942 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1943 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1944 | { |
1945 | slot->sl_status = nfserr; | |
1946 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1947 | } | |
1948 | ||
1949 | static __be32 | |
1950 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1951 | struct nfsd4_clid_slot *slot) | |
1952 | { | |
1953 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1954 | return slot->sl_status; | |
1955 | } | |
1956 | ||
1b74c25b MJ |
1957 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1958 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1959 | 1 + /* MIN tag is length with zero, only length */ \ | |
1960 | 3 + /* version, opcount, opcode */ \ | |
1961 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1962 | /* seqid, slotID, slotID, cache */ \ | |
1963 | 4 ) * sizeof(__be32)) | |
1964 | ||
1965 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1966 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1967 | 1 + /* status */ \ | |
1968 | 1 + /* MIN tag is length with zero, only length */ \ | |
1969 | 3 + /* opcount, opcode, opstatus*/ \ | |
1970 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1971 | /* seqid, slotID, slotID, slotID, status */ \ | |
1972 | 5 ) * sizeof(__be32)) | |
1973 | ||
55c760cf | 1974 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 1975 | { |
55c760cf BF |
1976 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
1977 | ||
373cd409 BF |
1978 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
1979 | return nfserr_toosmall; | |
1980 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
1981 | return nfserr_toosmall; | |
55c760cf BF |
1982 | ca->headerpadsz = 0; |
1983 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
1984 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
1985 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
1986 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
1987 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
1988 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
1989 | /* | |
1990 | * Note decreasing slot size below client's request may make it | |
1991 | * difficult for client to function correctly, whereas | |
1992 | * decreasing the number of slots will (just?) affect | |
1993 | * performance. When short on memory we therefore prefer to | |
1994 | * decrease number of slots instead of their size. Clients that | |
1995 | * request larger slots than they need will get poor results: | |
1996 | */ | |
1997 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
1998 | if (!ca->maxreqs) | |
1999 | return nfserr_jukebox; | |
2000 | ||
373cd409 | 2001 | return nfs_ok; |
1b74c25b MJ |
2002 | } |
2003 | ||
8a891633 KM |
2004 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2005 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2006 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2007 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2008 | ||
06b332a5 | 2009 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2010 | { |
06b332a5 BF |
2011 | ca->headerpadsz = 0; |
2012 | ||
2013 | /* | |
2014 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2015 | * don't even do gss on the backchannel yet. But this is still | |
2016 | * less than 1k. Tighten up this estimate in the unlikely event | |
2017 | * it turns out to be a problem for some client: | |
2018 | */ | |
8a891633 | 2019 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2020 | return nfserr_toosmall; |
8a891633 | 2021 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2022 | return nfserr_toosmall; |
2023 | ca->maxresp_cached = 0; | |
2024 | if (ca->maxops < 2) | |
2025 | return nfserr_toosmall; | |
2026 | ||
2027 | return nfs_ok; | |
1b74c25b MJ |
2028 | } |
2029 | ||
b78724b7 BF |
2030 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2031 | { | |
2032 | switch (cbs->flavor) { | |
2033 | case RPC_AUTH_NULL: | |
2034 | case RPC_AUTH_UNIX: | |
2035 | return nfs_ok; | |
2036 | default: | |
2037 | /* | |
2038 | * GSS case: the spec doesn't allow us to return this | |
2039 | * error. But it also doesn't allow us not to support | |
2040 | * GSS. | |
2041 | * I'd rather this fail hard than return some error the | |
2042 | * client might think it can already handle: | |
2043 | */ | |
2044 | return nfserr_encr_alg_unsupp; | |
2045 | } | |
2046 | } | |
2047 | ||
069b6ad4 AA |
2048 | __be32 |
2049 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2050 | struct nfsd4_compound_state *cstate, | |
2051 | struct nfsd4_create_session *cr_ses) | |
2052 | { | |
363168b4 | 2053 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2054 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 2055 | struct nfsd4_session *new; |
81f0b2a4 | 2056 | struct nfsd4_conn *conn; |
49557cc7 | 2057 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2058 | __be32 status = 0; |
8daae4dc | 2059 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2060 | |
a62573dc MJ |
2061 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2062 | return nfserr_inval; | |
b78724b7 BF |
2063 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2064 | if (status) | |
2065 | return status; | |
55c760cf | 2066 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2067 | if (status) |
2068 | return status; | |
2069 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2070 | if (status) |
f403e450 | 2071 | goto out_release_drc_mem; |
81f0b2a4 | 2072 | status = nfserr_jukebox; |
60810e54 | 2073 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2074 | if (!new) |
2075 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2076 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2077 | if (!conn) | |
2078 | goto out_free_session; | |
a62573dc | 2079 | |
ec6b5d7b | 2080 | nfs4_lock_state(); |
0a7ec377 | 2081 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2082 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2083 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2084 | |
2085 | if (conf) { | |
57266a6e BF |
2086 | status = nfserr_wrong_cred; |
2087 | if (!mach_creds_match(conf, rqstp)) | |
2088 | goto out_free_conn; | |
49557cc7 AA |
2089 | cs_slot = &conf->cl_cs_slot; |
2090 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2091 | if (status == nfserr_replay_cache) { |
49557cc7 | 2092 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2093 | goto out_free_conn; |
49557cc7 | 2094 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2095 | status = nfserr_seq_misordered; |
81f0b2a4 | 2096 | goto out_free_conn; |
ec6b5d7b | 2097 | } |
ec6b5d7b | 2098 | } else if (unconf) { |
8f9d3d3b | 2099 | struct nfs4_client *old; |
ec6b5d7b | 2100 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 2101 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2102 | status = nfserr_clid_inuse; |
81f0b2a4 | 2103 | goto out_free_conn; |
ec6b5d7b | 2104 | } |
57266a6e BF |
2105 | status = nfserr_wrong_cred; |
2106 | if (!mach_creds_match(unconf, rqstp)) | |
2107 | goto out_free_conn; | |
49557cc7 AA |
2108 | cs_slot = &unconf->cl_cs_slot; |
2109 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2110 | if (status) { |
2111 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2112 | status = nfserr_seq_misordered; |
81f0b2a4 | 2113 | goto out_free_conn; |
ec6b5d7b | 2114 | } |
382a62e7 | 2115 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2116 | if (old) { |
2117 | status = mark_client_expired(old); | |
2118 | if (status) | |
2119 | goto out_free_conn; | |
8f9d3d3b | 2120 | expire_client(old); |
221a6876 | 2121 | } |
8f9d3d3b | 2122 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2123 | conf = unconf; |
2124 | } else { | |
2125 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2126 | goto out_free_conn; |
ec6b5d7b | 2127 | } |
81f0b2a4 | 2128 | status = nfs_ok; |
408b79bc BF |
2129 | /* |
2130 | * We do not support RDMA or persistent sessions | |
2131 | */ | |
2132 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2133 | cr_ses->flags &= ~SESSION4_RDMA; | |
2134 | ||
81f0b2a4 BF |
2135 | init_session(rqstp, new, conf, cr_ses); |
2136 | nfsd4_init_conn(rqstp, conn, new); | |
2137 | ||
ac7c46f2 | 2138 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2139 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2140 | cs_slot->sl_seqid++; |
49557cc7 | 2141 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2142 | |
49557cc7 AA |
2143 | /* cache solo and embedded create sessions under the state lock */ |
2144 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 2145 | nfs4_unlock_state(); |
ec6b5d7b | 2146 | return status; |
81f0b2a4 | 2147 | out_free_conn: |
266533c6 | 2148 | nfs4_unlock_state(); |
81f0b2a4 BF |
2149 | free_conn(conn); |
2150 | out_free_session: | |
2151 | __free_session(new); | |
55c760cf BF |
2152 | out_release_drc_mem: |
2153 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2154 | return status; |
069b6ad4 AA |
2155 | } |
2156 | ||
1d1bc8f2 BF |
2157 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2158 | { | |
2159 | switch (*dir) { | |
2160 | case NFS4_CDFC4_FORE: | |
2161 | case NFS4_CDFC4_BACK: | |
2162 | return nfs_ok; | |
2163 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2164 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2165 | *dir = NFS4_CDFC4_BOTH; | |
2166 | return nfs_ok; | |
2167 | }; | |
2168 | return nfserr_inval; | |
2169 | } | |
2170 | ||
cb73a9f4 BF |
2171 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2172 | { | |
2173 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2174 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2175 | __be32 status; |
cb73a9f4 | 2176 | |
b78724b7 BF |
2177 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2178 | if (status) | |
2179 | return status; | |
c9a49628 | 2180 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2181 | session->se_cb_prog = bc->bc_cb_program; |
2182 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2183 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2184 | |
2185 | nfsd4_probe_callback(session->se_client); | |
2186 | ||
2187 | return nfs_ok; | |
2188 | } | |
2189 | ||
1d1bc8f2 BF |
2190 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2191 | struct nfsd4_compound_state *cstate, | |
2192 | struct nfsd4_bind_conn_to_session *bcts) | |
2193 | { | |
2194 | __be32 status; | |
3ba63671 | 2195 | struct nfsd4_conn *conn; |
4f6e6c17 | 2196 | struct nfsd4_session *session; |
d4e19e70 TM |
2197 | struct net *net = SVC_NET(rqstp); |
2198 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2199 | |
2200 | if (!nfsd4_last_compound_op(rqstp)) | |
2201 | return nfserr_not_only_op; | |
4f6e6c17 | 2202 | nfs4_lock_state(); |
c9a49628 | 2203 | spin_lock(&nn->client_lock); |
d4e19e70 | 2204 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2205 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2206 | if (!session) |
d4e19e70 | 2207 | goto out_no_session; |
57266a6e BF |
2208 | status = nfserr_wrong_cred; |
2209 | if (!mach_creds_match(session->se_client, rqstp)) | |
2210 | goto out; | |
1d1bc8f2 | 2211 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2212 | if (status) |
4f6e6c17 | 2213 | goto out; |
3ba63671 | 2214 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2215 | status = nfserr_jukebox; |
3ba63671 | 2216 | if (!conn) |
4f6e6c17 BF |
2217 | goto out; |
2218 | nfsd4_init_conn(rqstp, conn, session); | |
2219 | status = nfs_ok; | |
2220 | out: | |
d4e19e70 TM |
2221 | nfsd4_put_session(session); |
2222 | out_no_session: | |
4f6e6c17 BF |
2223 | nfs4_unlock_state(); |
2224 | return status; | |
1d1bc8f2 BF |
2225 | } |
2226 | ||
5d4cec2f BF |
2227 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2228 | { | |
2229 | if (!session) | |
2230 | return 0; | |
2231 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2232 | } | |
2233 | ||
069b6ad4 AA |
2234 | __be32 |
2235 | nfsd4_destroy_session(struct svc_rqst *r, | |
2236 | struct nfsd4_compound_state *cstate, | |
2237 | struct nfsd4_destroy_session *sessionid) | |
2238 | { | |
e10e0cfc | 2239 | struct nfsd4_session *ses; |
abcdff09 | 2240 | __be32 status; |
f0f51f5c | 2241 | int ref_held_by_me = 0; |
d4e19e70 TM |
2242 | struct net *net = SVC_NET(r); |
2243 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2244 | |
abcdff09 BF |
2245 | nfs4_lock_state(); |
2246 | status = nfserr_not_only_op; | |
5d4cec2f | 2247 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2248 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2249 | goto out; |
f0f51f5c | 2250 | ref_held_by_me++; |
57716355 | 2251 | } |
e10e0cfc | 2252 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2253 | spin_lock(&nn->client_lock); |
d4e19e70 | 2254 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2255 | if (!ses) |
2256 | goto out_client_lock; | |
57266a6e BF |
2257 | status = nfserr_wrong_cred; |
2258 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2259 | goto out_put_session; |
f0f51f5c | 2260 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2261 | if (status) |
f0f51f5c | 2262 | goto out_put_session; |
e10e0cfc | 2263 | unhash_session(ses); |
c9a49628 | 2264 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2265 | |
84f5f7cc | 2266 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2267 | |
c9a49628 | 2268 | spin_lock(&nn->client_lock); |
e10e0cfc | 2269 | status = nfs_ok; |
f0f51f5c | 2270 | out_put_session: |
d4e19e70 | 2271 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2272 | out_client_lock: |
2273 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2274 | out: |
abcdff09 | 2275 | nfs4_unlock_state(); |
e10e0cfc | 2276 | return status; |
069b6ad4 AA |
2277 | } |
2278 | ||
a663bdd8 | 2279 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2280 | { |
2281 | struct nfsd4_conn *c; | |
2282 | ||
2283 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2284 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2285 | return c; |
2286 | } | |
2287 | } | |
2288 | return NULL; | |
2289 | } | |
2290 | ||
57266a6e | 2291 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2292 | { |
2293 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2294 | struct nfsd4_conn *c; |
57266a6e | 2295 | __be32 status = nfs_ok; |
21b75b01 | 2296 | int ret; |
328ead28 BF |
2297 | |
2298 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2299 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2300 | if (c) |
2301 | goto out_free; | |
2302 | status = nfserr_conn_not_bound_to_session; | |
2303 | if (clp->cl_mach_cred) | |
2304 | goto out_free; | |
328ead28 BF |
2305 | __nfsd4_hash_conn(new, ses); |
2306 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2307 | ret = nfsd4_register_conn(new); |
2308 | if (ret) | |
2309 | /* oops; xprt is already down: */ | |
2310 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2311 | return nfs_ok; |
2312 | out_free: | |
2313 | spin_unlock(&clp->cl_lock); | |
2314 | free_conn(new); | |
2315 | return status; | |
328ead28 BF |
2316 | } |
2317 | ||
868b89c3 MJ |
2318 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2319 | { | |
2320 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2321 | ||
2322 | return args->opcnt > session->se_fchannel.maxops; | |
2323 | } | |
2324 | ||
ae82a8d0 MJ |
2325 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2326 | struct nfsd4_session *session) | |
2327 | { | |
2328 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2329 | ||
2330 | return xb->len > session->se_fchannel.maxreq_sz; | |
2331 | } | |
2332 | ||
069b6ad4 | 2333 | __be32 |
b85d4c01 | 2334 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2335 | struct nfsd4_compound_state *cstate, |
2336 | struct nfsd4_sequence *seq) | |
2337 | { | |
f9bb94c4 | 2338 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2339 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2340 | struct nfsd4_session *session; |
221a6876 | 2341 | struct nfs4_client *clp; |
b85d4c01 | 2342 | struct nfsd4_slot *slot; |
a663bdd8 | 2343 | struct nfsd4_conn *conn; |
57b7b43b | 2344 | __be32 status; |
47ee5298 | 2345 | int buflen; |
d4e19e70 TM |
2346 | struct net *net = SVC_NET(rqstp); |
2347 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2348 | |
f9bb94c4 AA |
2349 | if (resp->opcnt != 1) |
2350 | return nfserr_sequence_pos; | |
2351 | ||
a663bdd8 BF |
2352 | /* |
2353 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2354 | * below. | |
2355 | */ | |
2356 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2357 | if (!conn) | |
2358 | return nfserr_jukebox; | |
2359 | ||
c9a49628 | 2360 | spin_lock(&nn->client_lock); |
d4e19e70 | 2361 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2362 | if (!session) |
221a6876 BF |
2363 | goto out_no_session; |
2364 | clp = session->se_client; | |
b85d4c01 | 2365 | |
868b89c3 MJ |
2366 | status = nfserr_too_many_ops; |
2367 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2368 | goto out_put_session; |
868b89c3 | 2369 | |
ae82a8d0 MJ |
2370 | status = nfserr_req_too_big; |
2371 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2372 | goto out_put_session; |
ae82a8d0 | 2373 | |
b85d4c01 | 2374 | status = nfserr_badslot; |
6c18ba9f | 2375 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2376 | goto out_put_session; |
b85d4c01 | 2377 | |
557ce264 | 2378 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2379 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2380 | ||
a8dfdaeb AA |
2381 | /* We do not negotiate the number of slots yet, so set the |
2382 | * maxslots to the session maxreqs which is used to encode | |
2383 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2384 | seq->maxslots = session->se_fchannel.maxreqs; | |
2385 | ||
73e79482 BF |
2386 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2387 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2388 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2389 | status = nfserr_seq_misordered; |
2390 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2391 | goto out_put_session; |
b85d4c01 BH |
2392 | cstate->slot = slot; |
2393 | cstate->session = session; | |
da3846a2 | 2394 | /* Return the cached reply status and set cstate->status |
557ce264 | 2395 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2396 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2397 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2398 | goto out; |
b85d4c01 BH |
2399 | } |
2400 | if (status) | |
66b2b9b2 | 2401 | goto out_put_session; |
b85d4c01 | 2402 | |
57266a6e | 2403 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2404 | conn = NULL; |
57266a6e BF |
2405 | if (status) |
2406 | goto out_put_session; | |
328ead28 | 2407 | |
47ee5298 BF |
2408 | buflen = (seq->cachethis) ? |
2409 | session->se_fchannel.maxresp_cached : | |
2410 | session->se_fchannel.maxresp_sz; | |
2411 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2412 | nfserr_rep_too_big; | |
a5cddc88 | 2413 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2414 | goto out_put_session; |
32aaa62e | 2415 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2416 | |
2417 | status = nfs_ok; | |
b85d4c01 | 2418 | /* Success! bump slot seqid */ |
b85d4c01 | 2419 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2420 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2421 | if (seq->cachethis) |
2422 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2423 | else |
2424 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2425 | |
2426 | cstate->slot = slot; | |
2427 | cstate->session = session; | |
2428 | ||
b85d4c01 | 2429 | out: |
221a6876 BF |
2430 | switch (clp->cl_cb_state) { |
2431 | case NFSD4_CB_DOWN: | |
2432 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2433 | break; | |
2434 | case NFSD4_CB_FAULT: | |
2435 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2436 | break; | |
2437 | default: | |
2438 | seq->status_flags = 0; | |
aaf84eb9 | 2439 | } |
3bd64a5b BF |
2440 | if (!list_empty(&clp->cl_revoked)) |
2441 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2442 | out_no_session: |
3f42d2c4 KM |
2443 | if (conn) |
2444 | free_conn(conn); | |
c9a49628 | 2445 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2446 | return status; |
66b2b9b2 | 2447 | out_put_session: |
d4e19e70 | 2448 | nfsd4_put_session_locked(session); |
221a6876 | 2449 | goto out_no_session; |
069b6ad4 AA |
2450 | } |
2451 | ||
b607664e TM |
2452 | void |
2453 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2454 | { | |
2455 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2456 | ||
2457 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2458 | if (cs->status != nfserr_replay_cache) { |
2459 | nfsd4_store_cache_entry(resp); | |
2460 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2461 | } | |
d4e19e70 | 2462 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2463 | nfsd4_put_session(cs->session); |
b607664e TM |
2464 | } |
2465 | } | |
2466 | ||
345c2842 MJ |
2467 | __be32 |
2468 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2469 | { | |
2470 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2471 | __be32 status = 0; |
8daae4dc | 2472 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2473 | |
2474 | nfs4_lock_state(); | |
0a7ec377 | 2475 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2476 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2477 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2478 | |
2479 | if (conf) { | |
2480 | clp = conf; | |
2481 | ||
c0293b01 | 2482 | if (client_has_state(conf)) { |
345c2842 MJ |
2483 | status = nfserr_clientid_busy; |
2484 | goto out; | |
2485 | } | |
2486 | } else if (unconf) | |
2487 | clp = unconf; | |
2488 | else { | |
2489 | status = nfserr_stale_clientid; | |
2490 | goto out; | |
2491 | } | |
57266a6e BF |
2492 | if (!mach_creds_match(clp, rqstp)) { |
2493 | status = nfserr_wrong_cred; | |
2494 | goto out; | |
2495 | } | |
345c2842 MJ |
2496 | expire_client(clp); |
2497 | out: | |
2498 | nfs4_unlock_state(); | |
345c2842 MJ |
2499 | return status; |
2500 | } | |
2501 | ||
4dc6ec00 BF |
2502 | __be32 |
2503 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2504 | { | |
57b7b43b | 2505 | __be32 status = 0; |
bcecf1cc | 2506 | |
4dc6ec00 BF |
2507 | if (rc->rca_one_fs) { |
2508 | if (!cstate->current_fh.fh_dentry) | |
2509 | return nfserr_nofilehandle; | |
2510 | /* | |
2511 | * We don't take advantage of the rca_one_fs case. | |
2512 | * That's OK, it's optional, we can safely ignore it. | |
2513 | */ | |
2514 | return nfs_ok; | |
2515 | } | |
bcecf1cc | 2516 | |
4dc6ec00 | 2517 | nfs4_lock_state(); |
bcecf1cc | 2518 | status = nfserr_complete_already; |
a52d726b JL |
2519 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2520 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2521 | goto out; |
2522 | ||
2523 | status = nfserr_stale_clientid; | |
2524 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2525 | /* |
2526 | * The following error isn't really legal. | |
2527 | * But we only get here if the client just explicitly | |
2528 | * destroyed the client. Surely it no longer cares what | |
2529 | * error it gets back on an operation for the dead | |
2530 | * client. | |
2531 | */ | |
bcecf1cc MJ |
2532 | goto out; |
2533 | ||
2534 | status = nfs_ok; | |
2a4317c5 | 2535 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2536 | out: |
4dc6ec00 | 2537 | nfs4_unlock_state(); |
bcecf1cc | 2538 | return status; |
4dc6ec00 BF |
2539 | } |
2540 | ||
b37ad28b | 2541 | __be32 |
b591480b BF |
2542 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2543 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2544 | { |
a084daf5 | 2545 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2546 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2547 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2548 | __be32 status; |
c212cecf SK |
2549 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2550 | ||
63db4632 | 2551 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2552 | nfs4_lock_state(); |
382a62e7 | 2553 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2554 | if (conf) { |
63db4632 | 2555 | /* case 0: */ |
1da177e4 | 2556 | status = nfserr_clid_inuse; |
e203d506 BF |
2557 | if (clp_used_exchangeid(conf)) |
2558 | goto out; | |
026722c2 | 2559 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2560 | char addr_str[INET6_ADDRSTRLEN]; |
2561 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2562 | sizeof(addr_str)); | |
2563 | dprintk("NFSD: setclientid: string in use by client " | |
2564 | "at %s\n", addr_str); | |
1da177e4 LT |
2565 | goto out; |
2566 | } | |
1da177e4 | 2567 | } |
a99454aa | 2568 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2569 | if (unconf) |
2570 | expire_client(unconf); | |
3e772463 | 2571 | status = nfserr_jukebox; |
2216d449 | 2572 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2573 | if (new == NULL) |
2574 | goto out; | |
34b232bb | 2575 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2576 | /* case 1: probable callback update */ |
1da177e4 | 2577 | copy_clid(new, conf); |
34b232bb | 2578 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2579 | gen_clid(new, nn); |
8323c3b2 | 2580 | new->cl_minorversion = 0; |
6f3d772f | 2581 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2582 | add_to_unconfirmed(new); |
1da177e4 LT |
2583 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2584 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2585 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2586 | status = nfs_ok; | |
2587 | out: | |
2588 | nfs4_unlock_state(); | |
2589 | return status; | |
2590 | } | |
2591 | ||
2592 | ||
b37ad28b | 2593 | __be32 |
b591480b BF |
2594 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2595 | struct nfsd4_compound_state *cstate, | |
2596 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2597 | { |
21ab45a4 | 2598 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2599 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2600 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2601 | __be32 status; |
7f2210fa | 2602 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2603 | |
2c142baa | 2604 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2605 | return nfserr_stale_clientid; |
1da177e4 | 2606 | nfs4_lock_state(); |
21ab45a4 | 2607 | |
8daae4dc | 2608 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2609 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2610 | /* |
8695b90a BF |
2611 | * We try hard to give out unique clientid's, so if we get an |
2612 | * attempt to confirm the same clientid with a different cred, | |
2613 | * there's a bug somewhere. Let's charitably assume it's our | |
2614 | * bug. | |
a186e767 | 2615 | */ |
8695b90a BF |
2616 | status = nfserr_serverfault; |
2617 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2618 | goto out; | |
2619 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2620 | goto out; | |
63db4632 | 2621 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2622 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2623 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2624 | status = nfs_ok; |
90d700b7 BF |
2625 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2626 | status = nfserr_stale_clientid; | |
2627 | goto out; | |
2628 | } | |
2629 | status = nfs_ok; | |
2630 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2631 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2632 | nfsd4_probe_callback(conf); | |
2633 | expire_client(unconf); | |
90d700b7 | 2634 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2635 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2636 | if (conf) { |
2637 | status = mark_client_expired(conf); | |
2638 | if (status) | |
2639 | goto out; | |
8695b90a | 2640 | expire_client(conf); |
221a6876 | 2641 | } |
8695b90a | 2642 | move_to_confirmed(unconf); |
f3d03b92 | 2643 | nfsd4_probe_callback(unconf); |
08e8987c | 2644 | } |
1da177e4 | 2645 | out: |
1da177e4 LT |
2646 | nfs4_unlock_state(); |
2647 | return status; | |
2648 | } | |
2649 | ||
32513b40 BF |
2650 | static struct nfs4_file *nfsd4_alloc_file(void) |
2651 | { | |
2652 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2653 | } | |
2654 | ||
1da177e4 | 2655 | /* OPEN Share state helper functions */ |
32513b40 | 2656 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2657 | { |
1da177e4 LT |
2658 | unsigned int hashval = file_hashval(ino); |
2659 | ||
950e0118 TM |
2660 | lockdep_assert_held(&state_lock); |
2661 | ||
32513b40 | 2662 | atomic_set(&fp->fi_ref, 1); |
32513b40 BF |
2663 | INIT_LIST_HEAD(&fp->fi_stateids); |
2664 | INIT_LIST_HEAD(&fp->fi_delegations); | |
950e0118 TM |
2665 | ihold(ino); |
2666 | fp->fi_inode = ino; | |
32513b40 BF |
2667 | fp->fi_had_conflict = false; |
2668 | fp->fi_lease = NULL; | |
2669 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2670 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 2671 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
2672 | } |
2673 | ||
e8ff2a84 | 2674 | void |
1da177e4 LT |
2675 | nfsd4_free_slabs(void) |
2676 | { | |
abf1135b CH |
2677 | kmem_cache_destroy(openowner_slab); |
2678 | kmem_cache_destroy(lockowner_slab); | |
2679 | kmem_cache_destroy(file_slab); | |
2680 | kmem_cache_destroy(stateid_slab); | |
2681 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 2682 | } |
1da177e4 | 2683 | |
72083396 | 2684 | int |
e60d4398 N |
2685 | nfsd4_init_slabs(void) |
2686 | { | |
fe0750e5 BF |
2687 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2688 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2689 | if (openowner_slab == NULL) | |
abf1135b | 2690 | goto out; |
fe0750e5 | 2691 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 2692 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2693 | if (lockowner_slab == NULL) |
abf1135b | 2694 | goto out_free_openowner_slab; |
e60d4398 | 2695 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 2696 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 2697 | if (file_slab == NULL) |
abf1135b | 2698 | goto out_free_lockowner_slab; |
5ac049ac | 2699 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2700 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 2701 | if (stateid_slab == NULL) |
abf1135b | 2702 | goto out_free_file_slab; |
5b2d21c1 | 2703 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2704 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 2705 | if (deleg_slab == NULL) |
abf1135b | 2706 | goto out_free_stateid_slab; |
e60d4398 | 2707 | return 0; |
abf1135b CH |
2708 | |
2709 | out_free_stateid_slab: | |
2710 | kmem_cache_destroy(stateid_slab); | |
2711 | out_free_file_slab: | |
2712 | kmem_cache_destroy(file_slab); | |
2713 | out_free_lockowner_slab: | |
2714 | kmem_cache_destroy(lockowner_slab); | |
2715 | out_free_openowner_slab: | |
2716 | kmem_cache_destroy(openowner_slab); | |
2717 | out: | |
e60d4398 N |
2718 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
2719 | return -ENOMEM; | |
1da177e4 LT |
2720 | } |
2721 | ||
ff194bd9 | 2722 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2723 | { |
ff194bd9 BF |
2724 | rp->rp_status = nfserr_serverfault; |
2725 | rp->rp_buflen = 0; | |
2726 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2727 | } |
2728 | ||
fe0750e5 | 2729 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2730 | { |
1da177e4 | 2731 | struct nfs4_stateowner *sop; |
1da177e4 | 2732 | |
fe0750e5 | 2733 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2734 | if (!sop) |
2735 | return NULL; | |
2736 | ||
2737 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2738 | if (!sop->so_owner.data) { | |
fe0750e5 | 2739 | kmem_cache_free(slab, sop); |
1da177e4 | 2740 | return NULL; |
ff194bd9 BF |
2741 | } |
2742 | sop->so_owner.len = owner->len; | |
2743 | ||
ea1da636 | 2744 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2745 | sop->so_client = clp; |
2746 | init_nfs4_replay(&sop->so_replay); | |
2747 | return sop; | |
2748 | } | |
2749 | ||
fe0750e5 | 2750 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2751 | { |
9b531137 SK |
2752 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2753 | ||
2754 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2755 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2756 | } |
2757 | ||
fe0750e5 | 2758 | static struct nfs4_openowner * |
db24b3b4 JL |
2759 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
2760 | struct nfsd4_open *open, | |
2761 | struct nfsd4_compound_state *cstate) | |
2762 | { | |
fe0750e5 | 2763 | struct nfs4_openowner *oo; |
ff194bd9 | 2764 | |
fe0750e5 BF |
2765 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2766 | if (!oo) | |
ff194bd9 | 2767 | return NULL; |
fe0750e5 BF |
2768 | oo->oo_owner.so_is_open_owner = 1; |
2769 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2770 | oo->oo_flags = NFS4_OO_NEW; |
db24b3b4 JL |
2771 | if (nfsd4_has_session(cstate)) |
2772 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 2773 | oo->oo_time = 0; |
38c387b5 | 2774 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2775 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2776 | hash_openowner(oo, clp, strhashval); | |
2777 | return oo; | |
1da177e4 LT |
2778 | } |
2779 | ||
996e0938 | 2780 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2781 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2782 | |
3abdb607 | 2783 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 2784 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 2785 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2786 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2787 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2788 | get_nfs4_file(fp); |
1da177e4 | 2789 | stp->st_file = fp; |
1da177e4 LT |
2790 | stp->st_access_bmap = 0; |
2791 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2792 | set_access(open->op_share_access, stp); |
ce0fc43c | 2793 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2794 | stp->st_openstp = NULL; |
1da177e4 LT |
2795 | } |
2796 | ||
fd39ca9a | 2797 | static void |
73758fed | 2798 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2799 | { |
73758fed SK |
2800 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2801 | ||
fe0750e5 | 2802 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2803 | |
73758fed | 2804 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2805 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2806 | } |
2807 | ||
1da177e4 | 2808 | static int |
599e0a22 BF |
2809 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2810 | clientid_t *clid) | |
2811 | { | |
2812 | return (sop->so_owner.len == owner->len) && | |
2813 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2814 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2815 | } |
2816 | ||
fe0750e5 | 2817 | static struct nfs4_openowner * |
9b531137 SK |
2818 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2819 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2820 | { |
a50d2ad1 BF |
2821 | struct nfs4_stateowner *so; |
2822 | struct nfs4_openowner *oo; | |
d15c077e | 2823 | struct nfs4_client *clp; |
1da177e4 | 2824 | |
9b531137 | 2825 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2826 | if (!so->so_is_open_owner) |
2827 | continue; | |
a50d2ad1 BF |
2828 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2829 | oo = openowner(so); | |
d15c077e BF |
2830 | clp = oo->oo_owner.so_client; |
2831 | if ((bool)clp->cl_minorversion != sessions) | |
2832 | return NULL; | |
a50d2ad1 BF |
2833 | renew_client(oo->oo_owner.so_client); |
2834 | return oo; | |
2835 | } | |
1da177e4 LT |
2836 | } |
2837 | return NULL; | |
2838 | } | |
2839 | ||
2840 | /* search file_hashtbl[] for file */ | |
2841 | static struct nfs4_file * | |
950e0118 | 2842 | find_file_locked(struct inode *ino) |
1da177e4 LT |
2843 | { |
2844 | unsigned int hashval = file_hashval(ino); | |
2845 | struct nfs4_file *fp; | |
2846 | ||
950e0118 TM |
2847 | lockdep_assert_held(&state_lock); |
2848 | ||
89876f8c | 2849 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2850 | if (fp->fi_inode == ino) { |
2851 | get_nfs4_file(fp); | |
1da177e4 | 2852 | return fp; |
13cd2184 | 2853 | } |
1da177e4 LT |
2854 | } |
2855 | return NULL; | |
2856 | } | |
2857 | ||
950e0118 TM |
2858 | static struct nfs4_file * |
2859 | find_file(struct inode *ino) | |
2860 | { | |
2861 | struct nfs4_file *fp; | |
2862 | ||
2863 | spin_lock(&state_lock); | |
2864 | fp = find_file_locked(ino); | |
2865 | spin_unlock(&state_lock); | |
2866 | return fp; | |
2867 | } | |
2868 | ||
2869 | static struct nfs4_file * | |
2870 | find_or_add_file(struct inode *ino, struct nfs4_file *new) | |
2871 | { | |
2872 | struct nfs4_file *fp; | |
2873 | ||
2874 | spin_lock(&state_lock); | |
2875 | fp = find_file_locked(ino); | |
2876 | if (fp == NULL) { | |
2877 | nfsd4_init_file(new, ino); | |
2878 | fp = new; | |
2879 | } | |
2880 | spin_unlock(&state_lock); | |
2881 | ||
2882 | return fp; | |
2883 | } | |
2884 | ||
1da177e4 LT |
2885 | /* |
2886 | * Called to check deny when READ with all zero stateid or | |
2887 | * WRITE with all zero or all one stateid | |
2888 | */ | |
b37ad28b | 2889 | static __be32 |
1da177e4 LT |
2890 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2891 | { | |
2892 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2893 | struct nfs4_file *fp; | |
dcef0413 | 2894 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2895 | __be32 ret; |
1da177e4 | 2896 | |
1da177e4 | 2897 | fp = find_file(ino); |
13cd2184 N |
2898 | if (!fp) |
2899 | return nfs_ok; | |
b700949b | 2900 | ret = nfserr_locked; |
1da177e4 | 2901 | /* Search for conflicting share reservations */ |
13cd2184 | 2902 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2903 | if (test_deny(deny_type, stp) || |
2904 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2905 | goto out; |
1da177e4 | 2906 | } |
13cd2184 N |
2907 | ret = nfs_ok; |
2908 | out: | |
2909 | put_nfs4_file(fp); | |
2910 | return ret; | |
1da177e4 LT |
2911 | } |
2912 | ||
6b57d9c8 | 2913 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2914 | { |
e8c69d17 BF |
2915 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
2916 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2917 | ||
cdc97505 | 2918 | lockdep_assert_held(&state_lock); |
1da177e4 LT |
2919 | /* We're assuming the state code never drops its reference |
2920 | * without first removing the lease. Since we're in this lease | |
2921 | * callback (and since the lease code is serialized by the kernel | |
2922 | * lock) we know the server hasn't removed the lease yet, we know | |
2923 | * it's safe to take a reference: */ | |
2924 | atomic_inc(&dp->dl_count); | |
2925 | ||
e8c69d17 | 2926 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
1da177e4 | 2927 | |
1c8c601a | 2928 | /* Only place dl_time is set; protected by i_lock: */ |
1da177e4 LT |
2929 | dp->dl_time = get_seconds(); |
2930 | ||
6282cd56 N |
2931 | block_delegations(&dp->dl_fh); |
2932 | ||
6b57d9c8 BF |
2933 | nfsd4_cb_recall(dp); |
2934 | } | |
2935 | ||
1c8c601a | 2936 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
2937 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2938 | { | |
acfdf5c3 BF |
2939 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2940 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2941 | |
7fa10cd1 BF |
2942 | if (!fp) { |
2943 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2944 | return; | |
2945 | } | |
2946 | if (fp->fi_had_conflict) { | |
2947 | WARN(1, "duplicate break on %p\n", fp); | |
2948 | return; | |
2949 | } | |
0272e1fd BF |
2950 | /* |
2951 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2952 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2953 | * in time: |
0272e1fd BF |
2954 | */ |
2955 | fl->fl_break_time = 0; | |
1da177e4 | 2956 | |
cdc97505 | 2957 | spin_lock(&state_lock); |
acfdf5c3 BF |
2958 | fp->fi_had_conflict = true; |
2959 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2960 | nfsd_break_one_deleg(dp); | |
cdc97505 | 2961 | spin_unlock(&state_lock); |
1da177e4 LT |
2962 | } |
2963 | ||
1da177e4 LT |
2964 | static |
2965 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2966 | { | |
2967 | if (arg & F_UNLCK) | |
2968 | return lease_modify(onlist, arg); | |
2969 | else | |
2970 | return -EAGAIN; | |
2971 | } | |
2972 | ||
7b021967 | 2973 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2974 | .lm_break = nfsd_break_deleg_cb, |
2975 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2976 | }; |
2977 | ||
7a8711c9 BF |
2978 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2979 | { | |
2980 | if (nfsd4_has_session(cstate)) | |
2981 | return nfs_ok; | |
2982 | if (seqid == so->so_seqid - 1) | |
2983 | return nfserr_replay_me; | |
2984 | if (seqid == so->so_seqid) | |
2985 | return nfs_ok; | |
2986 | return nfserr_bad_seqid; | |
2987 | } | |
1da177e4 | 2988 | |
b37ad28b | 2989 | __be32 |
6668958f | 2990 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 2991 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 2992 | { |
1da177e4 LT |
2993 | clientid_t *clientid = &open->op_clientid; |
2994 | struct nfs4_client *clp = NULL; | |
2995 | unsigned int strhashval; | |
fe0750e5 | 2996 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2997 | __be32 status; |
1da177e4 | 2998 | |
2c142baa | 2999 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3000 | return nfserr_stale_clientid; |
32513b40 BF |
3001 | /* |
3002 | * In case we need it later, after we've already created the | |
3003 | * file and don't want to risk a further failure: | |
3004 | */ | |
3005 | open->op_file = nfsd4_alloc_file(); | |
3006 | if (open->op_file == NULL) | |
3007 | return nfserr_jukebox; | |
1da177e4 | 3008 | |
16bfdaaf | 3009 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 3010 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
3011 | open->op_openowner = oo; |
3012 | if (!oo) { | |
8daae4dc SK |
3013 | clp = find_confirmed_client(clientid, cstate->minorversion, |
3014 | nn); | |
1da177e4 | 3015 | if (clp == NULL) |
0f442aa2 | 3016 | return nfserr_expired; |
bcf130f9 | 3017 | goto new_owner; |
1da177e4 | 3018 | } |
dad1c067 | 3019 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3020 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3021 | clp = oo->oo_owner.so_client; |
3022 | release_openowner(oo); | |
3023 | open->op_openowner = NULL; | |
bcf130f9 | 3024 | goto new_owner; |
0f442aa2 | 3025 | } |
4cdc951b BF |
3026 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3027 | if (status) | |
3028 | return status; | |
3029 | clp = oo->oo_owner.so_client; | |
3030 | goto alloc_stateid; | |
bcf130f9 | 3031 | new_owner: |
db24b3b4 | 3032 | oo = alloc_init_open_stateowner(strhashval, clp, open, cstate); |
bcf130f9 BF |
3033 | if (oo == NULL) |
3034 | return nfserr_jukebox; | |
3035 | open->op_openowner = oo; | |
4cdc951b BF |
3036 | alloc_stateid: |
3037 | open->op_stp = nfs4_alloc_stateid(clp); | |
3038 | if (!open->op_stp) | |
3039 | return nfserr_jukebox; | |
0f442aa2 | 3040 | return nfs_ok; |
1da177e4 LT |
3041 | } |
3042 | ||
b37ad28b | 3043 | static inline __be32 |
4a6e43e6 N |
3044 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3045 | { | |
3046 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3047 | return nfserr_openmode; | |
3048 | else | |
3049 | return nfs_ok; | |
3050 | } | |
3051 | ||
f459e453 | 3052 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3053 | { |
f459e453 | 3054 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3055 | } |
3056 | ||
38c2f4b1 | 3057 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3058 | { |
f459e453 | 3059 | struct nfs4_stid *ret; |
24a0111e | 3060 | |
38c2f4b1 | 3061 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3062 | if (!ret) |
3063 | return NULL; | |
3064 | return delegstateid(ret); | |
24a0111e BF |
3065 | } |
3066 | ||
8b289b2c BF |
3067 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3068 | { | |
3069 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3070 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3071 | } | |
3072 | ||
b37ad28b | 3073 | static __be32 |
41d22663 | 3074 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3075 | struct nfs4_delegation **dp) |
3076 | { | |
3077 | int flags; | |
b37ad28b | 3078 | __be32 status = nfserr_bad_stateid; |
567d9829 | 3079 | |
38c2f4b1 | 3080 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 3081 | if (*dp == NULL) |
c44c5eeb | 3082 | goto out; |
24a0111e | 3083 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
3084 | status = nfs4_check_delegmode(*dp, flags); |
3085 | if (status) | |
3086 | *dp = NULL; | |
c44c5eeb | 3087 | out: |
8b289b2c | 3088 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3089 | return nfs_ok; |
3090 | if (status) | |
3091 | return status; | |
dad1c067 | 3092 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3093 | return nfs_ok; |
567d9829 N |
3094 | } |
3095 | ||
b37ad28b | 3096 | static __be32 |
dcef0413 | 3097 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 3098 | { |
dcef0413 | 3099 | struct nfs4_ol_stateid *local; |
fe0750e5 | 3100 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3101 | |
8beefa24 | 3102 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3103 | /* ignore lock owners */ |
3104 | if (local->st_stateowner->so_is_open_owner == 0) | |
3105 | continue; | |
3106 | /* remember if we have seen this open owner */ | |
fe0750e5 | 3107 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
3108 | *stpp = local; |
3109 | /* check for conflicting share reservations */ | |
3110 | if (!test_share(local, open)) | |
77eaae8d | 3111 | return nfserr_share_denied; |
1da177e4 | 3112 | } |
77eaae8d | 3113 | return nfs_ok; |
1da177e4 LT |
3114 | } |
3115 | ||
21fb4016 BF |
3116 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3117 | { | |
3118 | int flags = 0; | |
3119 | ||
3120 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3121 | flags |= NFSD_MAY_READ; | |
3122 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3123 | flags |= NFSD_MAY_WRITE; | |
3124 | return flags; | |
3125 | } | |
3126 | ||
7e6a72e5 CH |
3127 | static inline __be32 |
3128 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3129 | struct nfsd4_open *open) | |
3130 | { | |
3131 | struct iattr iattr = { | |
3132 | .ia_valid = ATTR_SIZE, | |
3133 | .ia_size = 0, | |
3134 | }; | |
3135 | if (!open->op_truncate) | |
3136 | return 0; | |
3137 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3138 | return nfserr_inval; | |
3139 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3140 | } | |
3141 | ||
0c12eaff CB |
3142 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
3143 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
3144 | { |
3145 | __be32 status; | |
0c12eaff CB |
3146 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3147 | int access = nfs4_access_to_access(open->op_share_access); | |
3148 | ||
f9d7562f BF |
3149 | if (!fp->fi_fds[oflag]) { |
3150 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
3151 | &fp->fi_fds[oflag]); | |
f9d7562f | 3152 | if (status) |
7e6a72e5 | 3153 | goto out; |
f9d7562f BF |
3154 | } |
3155 | nfs4_file_get_access(fp, oflag); | |
3156 | ||
7e6a72e5 CH |
3157 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3158 | if (status) | |
3159 | goto out_put_access; | |
3160 | ||
f9d7562f | 3161 | return nfs_ok; |
f9d7562f | 3162 | |
7e6a72e5 CH |
3163 | out_put_access: |
3164 | nfs4_file_put_access(fp, oflag); | |
3165 | out: | |
3166 | return status; | |
1da177e4 LT |
3167 | } |
3168 | ||
b37ad28b | 3169 | static __be32 |
dcef0413 | 3170 | 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 | 3171 | { |
b6d2f1ca | 3172 | u32 op_share_access = open->op_share_access; |
b37ad28b | 3173 | __be32 status; |
1da177e4 | 3174 | |
7e6a72e5 | 3175 | if (!test_access(op_share_access, stp)) |
0c12eaff | 3176 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
7e6a72e5 CH |
3177 | else |
3178 | status = nfsd4_truncate(rqstp, cur_fh, open); | |
3179 | ||
3180 | if (status) | |
1da177e4 | 3181 | return status; |
7e6a72e5 | 3182 | |
1da177e4 | 3183 | /* remember the open */ |
82c5ff1b | 3184 | set_access(op_share_access, stp); |
ce0fc43c | 3185 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
3186 | return nfs_ok; |
3187 | } | |
3188 | ||
3189 | ||
1da177e4 | 3190 | static void |
1255a8f3 | 3191 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3192 | { |
dad1c067 | 3193 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3194 | } |
3195 | ||
14a24e99 BF |
3196 | /* Should we give out recallable state?: */ |
3197 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3198 | { | |
3199 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3200 | return true; | |
3201 | /* | |
3202 | * In the sessions case, since we don't have to establish a | |
3203 | * separate connection for callbacks, we assume it's OK | |
3204 | * until we hear otherwise: | |
3205 | */ | |
3206 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3207 | } | |
3208 | ||
22d38c4c BF |
3209 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
3210 | { | |
3211 | struct file_lock *fl; | |
3212 | ||
3213 | fl = locks_alloc_lock(); | |
3214 | if (!fl) | |
3215 | return NULL; | |
3216 | locks_init_lock(fl); | |
3217 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3218 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3219 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3220 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 3221 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 3222 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3223 | return fl; |
3224 | } | |
3225 | ||
99c41515 | 3226 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3227 | { |
acfdf5c3 | 3228 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
3229 | struct file_lock *fl; |
3230 | int status; | |
3231 | ||
99c41515 | 3232 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3233 | if (!fl) |
3234 | return -ENOMEM; | |
acfdf5c3 | 3235 | fl->fl_file = find_readable_file(fp); |
acfdf5c3 | 3236 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
e873088f BF |
3237 | if (status) |
3238 | goto out_free; | |
acfdf5c3 | 3239 | fp->fi_lease = fl; |
cb0942b8 | 3240 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 | 3241 | atomic_set(&fp->fi_delegees, 1); |
cdc97505 | 3242 | spin_lock(&state_lock); |
931ee56c | 3243 | hash_delegation_locked(dp, fp); |
cdc97505 | 3244 | spin_unlock(&state_lock); |
acfdf5c3 | 3245 | return 0; |
e873088f BF |
3246 | out_free: |
3247 | locks_free_lock(fl); | |
3248 | return status; | |
acfdf5c3 BF |
3249 | } |
3250 | ||
bf7bd3e9 | 3251 | static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp) |
acfdf5c3 | 3252 | { |
bf7bd3e9 BF |
3253 | if (fp->fi_had_conflict) |
3254 | return -EAGAIN; | |
3255 | get_nfs4_file(fp); | |
3256 | dp->dl_file = fp; | |
cbf7a75b BF |
3257 | if (!fp->fi_lease) |
3258 | return nfs4_setlease(dp); | |
cdc97505 | 3259 | spin_lock(&state_lock); |
cbf7a75b | 3260 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3261 | if (fp->fi_had_conflict) { |
cdc97505 | 3262 | spin_unlock(&state_lock); |
cbf7a75b | 3263 | return -EAGAIN; |
acfdf5c3 | 3264 | } |
931ee56c | 3265 | hash_delegation_locked(dp, fp); |
cdc97505 | 3266 | spin_unlock(&state_lock); |
edab9782 BF |
3267 | return 0; |
3268 | } | |
3269 | ||
4aa8913c BH |
3270 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3271 | { | |
3272 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3273 | if (status == -EAGAIN) | |
3274 | open->op_why_no_deleg = WND4_CONTENTION; | |
3275 | else { | |
3276 | open->op_why_no_deleg = WND4_RESOURCE; | |
3277 | switch (open->op_deleg_want) { | |
3278 | case NFS4_SHARE_WANT_READ_DELEG: | |
3279 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3280 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3281 | break; | |
3282 | case NFS4_SHARE_WANT_CANCEL: | |
3283 | open->op_why_no_deleg = WND4_CANCELLED; | |
3284 | break; | |
3285 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3286 | WARN_ON_ONCE(1); |
4aa8913c BH |
3287 | } |
3288 | } | |
3289 | } | |
3290 | ||
1da177e4 LT |
3291 | /* |
3292 | * Attempt to hand out a delegation. | |
99c41515 BF |
3293 | * |
3294 | * Note we don't support write delegations, and won't until the vfs has | |
3295 | * proper support for them. | |
1da177e4 LT |
3296 | */ |
3297 | static void | |
5ccb0066 SK |
3298 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
3299 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3300 | { |
3301 | struct nfs4_delegation *dp; | |
fe0750e5 | 3302 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 3303 | int cb_up; |
99c41515 | 3304 | int status = 0; |
1da177e4 | 3305 | |
fe0750e5 | 3306 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3307 | open->op_recall = 0; |
3308 | switch (open->op_claim_type) { | |
3309 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3310 | if (!cb_up) |
7b190fec | 3311 | open->op_recall = 1; |
99c41515 BF |
3312 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3313 | goto out_no_deleg; | |
7b190fec N |
3314 | break; |
3315 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3316 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3317 | /* |
3318 | * Let's not give out any delegations till everyone's | |
3319 | * had the chance to reclaim theirs.... | |
3320 | */ | |
5ccb0066 | 3321 | if (locks_in_grace(net)) |
99c41515 | 3322 | goto out_no_deleg; |
dad1c067 | 3323 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3324 | goto out_no_deleg; |
9a0590ae SD |
3325 | /* |
3326 | * Also, if the file was opened for write or | |
3327 | * create, there's a good chance the client's | |
3328 | * about to write to it, resulting in an | |
3329 | * immediate recall (since we don't support | |
3330 | * write delegations): | |
3331 | */ | |
7b190fec | 3332 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3333 | goto out_no_deleg; |
3334 | if (open->op_create == NFS4_OPEN_CREATE) | |
3335 | goto out_no_deleg; | |
7b190fec N |
3336 | break; |
3337 | default: | |
99c41515 | 3338 | goto out_no_deleg; |
7b190fec | 3339 | } |
99c41515 | 3340 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh); |
dd239cc0 BF |
3341 | if (dp == NULL) |
3342 | goto out_no_deleg; | |
bf7bd3e9 | 3343 | status = nfs4_set_delegation(dp, stp->st_file); |
edab9782 | 3344 | if (status) |
dd239cc0 | 3345 | goto out_free; |
1da177e4 | 3346 | |
d5477a8d | 3347 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3348 | |
8c10cbdb | 3349 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3350 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3351 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
dd239cc0 BF |
3352 | return; |
3353 | out_free: | |
cbf7a75b | 3354 | destroy_delegation(dp); |
dd239cc0 | 3355 | out_no_deleg: |
99c41515 BF |
3356 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3357 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3358 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3359 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3360 | open->op_recall = 1; |
3361 | } | |
99c41515 BF |
3362 | |
3363 | /* 4.1 client asking for a delegation? */ | |
3364 | if (open->op_deleg_want) | |
3365 | nfsd4_open_deleg_none_ext(open, status); | |
3366 | return; | |
1da177e4 LT |
3367 | } |
3368 | ||
e27f49c3 BH |
3369 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3370 | struct nfs4_delegation *dp) | |
3371 | { | |
3372 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3373 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3374 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3375 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3376 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3377 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3378 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3379 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3380 | } | |
3381 | /* Otherwise the client must be confused wanting a delegation | |
3382 | * it already has, therefore we don't return | |
3383 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3384 | */ | |
3385 | } | |
3386 | ||
1da177e4 LT |
3387 | /* |
3388 | * called with nfs4_lock_state() held. | |
3389 | */ | |
b37ad28b | 3390 | __be32 |
1da177e4 LT |
3391 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3392 | { | |
6668958f | 3393 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3394 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3395 | struct nfs4_file *fp = NULL; |
3396 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3397 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3398 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3399 | __be32 status; |
1da177e4 | 3400 | |
1da177e4 LT |
3401 | /* |
3402 | * Lookup file; if found, lookup stateid and check open request, | |
3403 | * and check for delegations in the process of being recalled. | |
3404 | * If not found, create the nfs4_file struct | |
3405 | */ | |
950e0118 TM |
3406 | fp = find_or_add_file(ino, open->op_file); |
3407 | if (fp != open->op_file) { | |
1da177e4 LT |
3408 | if ((status = nfs4_check_open(fp, open, &stp))) |
3409 | goto out; | |
41d22663 | 3410 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3411 | if (status) |
3412 | goto out; | |
1da177e4 | 3413 | } else { |
950e0118 | 3414 | open->op_file = NULL; |
c44c5eeb | 3415 | status = nfserr_bad_stateid; |
8b289b2c | 3416 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3417 | goto out; |
3e772463 | 3418 | status = nfserr_jukebox; |
1da177e4 LT |
3419 | } |
3420 | ||
3421 | /* | |
3422 | * OPEN the file, or upgrade an existing OPEN. | |
3423 | * If truncate fails, the OPEN fails. | |
3424 | */ | |
3425 | if (stp) { | |
3426 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3427 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3428 | if (status) |
3429 | goto out; | |
3430 | } else { | |
4cdc951b | 3431 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 3432 | if (status) |
1da177e4 | 3433 | goto out; |
4cdc951b BF |
3434 | stp = open->op_stp; |
3435 | open->op_stp = NULL; | |
996e0938 | 3436 | init_open_stateid(stp, fp, open); |
1da177e4 | 3437 | } |
dcef0413 BF |
3438 | update_stateid(&stp->st_stid.sc_stateid); |
3439 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3440 | |
d24433cd | 3441 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
3442 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3443 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3444 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3445 | goto nodeleg; | |
3446 | } | |
3447 | } | |
3448 | ||
1da177e4 LT |
3449 | /* |
3450 | * Attempt to hand out a delegation. No error return, because the | |
3451 | * OPEN succeeds even if we fail. | |
3452 | */ | |
5ccb0066 | 3453 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3454 | nodeleg: |
1da177e4 LT |
3455 | status = nfs_ok; |
3456 | ||
8c10cbdb | 3457 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3458 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3459 | out: |
d24433cd BH |
3460 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3461 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3462 | open->op_deleg_want) |
3463 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3464 | |
13cd2184 N |
3465 | if (fp) |
3466 | put_nfs4_file(fp); | |
37515177 | 3467 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3468 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3469 | /* |
3470 | * To finish the open response, we just need to set the rflags. | |
3471 | */ | |
3472 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3473 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3474 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3475 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3476 | ||
3477 | return status; | |
3478 | } | |
3479 | ||
d29b20cd BF |
3480 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3481 | { | |
3482 | if (open->op_openowner) { | |
3483 | struct nfs4_openowner *oo = open->op_openowner; | |
3484 | ||
3485 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3486 | list_del_init(&oo->oo_close_lru); | |
3487 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3488 | if (status) { | |
3489 | release_openowner(oo); | |
3490 | open->op_openowner = NULL; | |
3491 | } else | |
3492 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3493 | } | |
3494 | } | |
32513b40 BF |
3495 | if (open->op_file) |
3496 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3497 | if (open->op_stp) |
ef79859e | 3498 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3499 | } |
3500 | ||
9b2ef62b BF |
3501 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
3502 | { | |
3503 | struct nfs4_client *found; | |
3504 | ||
3505 | if (STALE_CLIENTID(clid, nn)) | |
3506 | return nfserr_stale_clientid; | |
3507 | found = find_confirmed_client(clid, session, nn); | |
3508 | if (clp) | |
3509 | *clp = found; | |
3510 | return found ? nfs_ok : nfserr_expired; | |
3511 | } | |
3512 | ||
b37ad28b | 3513 | __be32 |
b591480b BF |
3514 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3515 | clientid_t *clid) | |
1da177e4 LT |
3516 | { |
3517 | struct nfs4_client *clp; | |
b37ad28b | 3518 | __be32 status; |
7f2210fa | 3519 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3520 | |
3521 | nfs4_lock_state(); | |
3522 | dprintk("process_renew(%08x/%08x): starting\n", | |
3523 | clid->cl_boot, clid->cl_id); | |
9b2ef62b BF |
3524 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
3525 | if (status) | |
1da177e4 | 3526 | goto out; |
1da177e4 | 3527 | status = nfserr_cb_path_down; |
ea1da636 | 3528 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3529 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3530 | goto out; |
3531 | status = nfs_ok; | |
3532 | out: | |
3533 | nfs4_unlock_state(); | |
3534 | return status; | |
3535 | } | |
3536 | ||
a76b4319 | 3537 | static void |
12760c66 | 3538 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3539 | { |
33dcc481 | 3540 | /* do nothing if grace period already ended */ |
a51c84ed | 3541 | if (nn->grace_ended) |
33dcc481 JL |
3542 | return; |
3543 | ||
a76b4319 | 3544 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3545 | nn->grace_ended = true; |
12760c66 | 3546 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3547 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3548 | /* |
3549 | * Now that every NFSv4 client has had the chance to recover and | |
3550 | * to see the (possibly new, possibly shorter) lease time, we | |
3551 | * can safely set the next grace time to the current lease time: | |
3552 | */ | |
5284b44e | 3553 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3554 | } |
3555 | ||
fd39ca9a | 3556 | static time_t |
09121281 | 3557 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3558 | { |
3559 | struct nfs4_client *clp; | |
fe0750e5 | 3560 | struct nfs4_openowner *oo; |
1da177e4 LT |
3561 | struct nfs4_delegation *dp; |
3562 | struct list_head *pos, *next, reaplist; | |
3d733711 | 3563 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 3564 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
3565 | |
3566 | nfs4_lock_state(); | |
3567 | ||
3568 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3569 | nfsd4_end_grace(nn); |
36acb66b | 3570 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3571 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3572 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3573 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3574 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3575 | t = clp->cl_time - cutoff; | |
a832e7ae | 3576 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
3577 | break; |
3578 | } | |
221a6876 | 3579 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3580 | dprintk("NFSD: client in use (clientid %08x)\n", |
3581 | clp->cl_clientid.cl_id); | |
3582 | continue; | |
3583 | } | |
221a6876 | 3584 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3585 | } |
c9a49628 | 3586 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3587 | list_for_each_safe(pos, next, &reaplist) { |
3588 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3589 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3590 | clp->cl_clientid.cl_id); | |
3591 | expire_client(clp); | |
3592 | } | |
cdc97505 | 3593 | spin_lock(&state_lock); |
e8c69d17 | 3594 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3595 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3596 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3597 | continue; | |
1da177e4 | 3598 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
3599 | t = dp->dl_time - cutoff; |
3600 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3601 | break; |
3602 | } | |
1da177e4 LT |
3603 | list_move(&dp->dl_recall_lru, &reaplist); |
3604 | } | |
cdc97505 | 3605 | spin_unlock(&state_lock); |
1da177e4 LT |
3606 | list_for_each_safe(pos, next, &reaplist) { |
3607 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 3608 | revoke_delegation(dp); |
1da177e4 | 3609 | } |
73758fed | 3610 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3611 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3612 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
3613 | t = oo->oo_time - cutoff; |
3614 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3615 | break; |
3616 | } | |
fe0750e5 | 3617 | release_openowner(oo); |
1da177e4 | 3618 | } |
a832e7ae | 3619 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 3620 | nfs4_unlock_state(); |
a832e7ae | 3621 | return new_timeo; |
1da177e4 LT |
3622 | } |
3623 | ||
a254b246 HH |
3624 | static struct workqueue_struct *laundry_wq; |
3625 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3626 | |
3627 | static void | |
09121281 | 3628 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3629 | { |
3630 | time_t t; | |
09121281 SK |
3631 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3632 | work); | |
3633 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3634 | laundromat_work); | |
1da177e4 | 3635 | |
09121281 | 3636 | t = nfs4_laundromat(nn); |
1da177e4 | 3637 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3638 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3639 | } |
3640 | ||
f7a4d872 | 3641 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3642 | { |
f7a4d872 BF |
3643 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3644 | return nfserr_bad_stateid; | |
3645 | return nfs_ok; | |
1da177e4 LT |
3646 | } |
3647 | ||
1da177e4 | 3648 | static inline int |
82c5ff1b | 3649 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3650 | { |
82c5ff1b JL |
3651 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3652 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3653 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3654 | } |
3655 | ||
3656 | static inline int | |
82c5ff1b | 3657 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3658 | { |
82c5ff1b JL |
3659 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3660 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3661 | } |
3662 | ||
3663 | static | |
dcef0413 | 3664 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3665 | { |
b37ad28b | 3666 | __be32 status = nfserr_openmode; |
1da177e4 | 3667 | |
02921914 BF |
3668 | /* For lock stateid's, we test the parent open, not the lock: */ |
3669 | if (stp->st_openstp) | |
3670 | stp = stp->st_openstp; | |
82c5ff1b | 3671 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3672 | goto out; |
82c5ff1b | 3673 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3674 | goto out; |
3675 | status = nfs_ok; | |
3676 | out: | |
3677 | return status; | |
3678 | } | |
3679 | ||
b37ad28b | 3680 | static inline __be32 |
5ccb0066 | 3681 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3682 | { |
203a8c8e | 3683 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3684 | return nfs_ok; |
5ccb0066 | 3685 | else if (locks_in_grace(net)) { |
25985edc | 3686 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3687 | * conflicting state; so we must wait out the grace period. */ |
3688 | return nfserr_grace; | |
3689 | } else if (flags & WR_STATE) | |
3690 | return nfs4_share_conflict(current_fh, | |
3691 | NFS4_SHARE_DENY_WRITE); | |
3692 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3693 | return nfs4_share_conflict(current_fh, | |
3694 | NFS4_SHARE_DENY_READ); | |
3695 | } | |
3696 | ||
3697 | /* | |
3698 | * Allow READ/WRITE during grace period on recovered state only for files | |
3699 | * that are not able to provide mandatory locking. | |
3700 | */ | |
3701 | static inline int | |
5ccb0066 | 3702 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3703 | { |
5ccb0066 | 3704 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3705 | } |
3706 | ||
81b82965 BF |
3707 | /* Returns true iff a is later than b: */ |
3708 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3709 | { | |
1a9357f4 | 3710 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
3711 | } |
3712 | ||
57b7b43b | 3713 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3714 | { |
6668958f AA |
3715 | /* |
3716 | * When sessions are used the stateid generation number is ignored | |
3717 | * when it is zero. | |
3718 | */ | |
28dde241 | 3719 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3720 | return nfs_ok; |
3721 | ||
3722 | if (in->si_generation == ref->si_generation) | |
3723 | return nfs_ok; | |
6668958f | 3724 | |
0836f587 | 3725 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3726 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3727 | return nfserr_bad_stateid; |
3728 | /* | |
81b82965 BF |
3729 | * However, we could see a stateid from the past, even from a |
3730 | * non-buggy client. For example, if the client sends a lock | |
3731 | * while some IO is outstanding, the lock may bump si_generation | |
3732 | * while the IO is still in flight. The client could avoid that | |
3733 | * situation by waiting for responses on all the IO requests, | |
3734 | * but better performance may result in retrying IO that | |
3735 | * receives an old_stateid error if requests are rarely | |
3736 | * reordered in flight: | |
0836f587 | 3737 | */ |
81b82965 | 3738 | return nfserr_old_stateid; |
0836f587 BF |
3739 | } |
3740 | ||
7df302f7 | 3741 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3742 | { |
97b7e3b6 BF |
3743 | struct nfs4_stid *s; |
3744 | struct nfs4_ol_stateid *ols; | |
3745 | __be32 status; | |
17456804 | 3746 | |
7df302f7 CL |
3747 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3748 | return nfserr_bad_stateid; | |
3749 | /* Client debugging aid. */ | |
3750 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3751 | char addr_str[INET6_ADDRSTRLEN]; | |
3752 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3753 | sizeof(addr_str)); | |
3754 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3755 | "with incorrect client ID\n", addr_str); | |
3756 | return nfserr_bad_stateid; | |
3757 | } | |
38c2f4b1 | 3758 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3759 | if (!s) |
7df302f7 | 3760 | return nfserr_bad_stateid; |
36279ac1 | 3761 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3762 | if (status) |
97b7e3b6 | 3763 | return status; |
23340032 BF |
3764 | switch (s->sc_type) { |
3765 | case NFS4_DELEG_STID: | |
97b7e3b6 | 3766 | return nfs_ok; |
3bd64a5b BF |
3767 | case NFS4_REVOKED_DELEG_STID: |
3768 | return nfserr_deleg_revoked; | |
23340032 BF |
3769 | case NFS4_OPEN_STID: |
3770 | case NFS4_LOCK_STID: | |
3771 | ols = openlockstateid(s); | |
3772 | if (ols->st_stateowner->so_is_open_owner | |
3773 | && !(openowner(ols->st_stateowner)->oo_flags | |
3774 | & NFS4_OO_CONFIRMED)) | |
3775 | return nfserr_bad_stateid; | |
97b7e3b6 | 3776 | return nfs_ok; |
23340032 BF |
3777 | default: |
3778 | printk("unknown stateid type %x\n", s->sc_type); | |
3779 | case NFS4_CLOSED_STID: | |
97b7e3b6 | 3780 | return nfserr_bad_stateid; |
23340032 | 3781 | } |
17456804 BS |
3782 | } |
3783 | ||
3320fef1 SK |
3784 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
3785 | struct nfs4_stid **s, bool sessions, | |
3786 | struct nfsd_net *nn) | |
38c2f4b1 BF |
3787 | { |
3788 | struct nfs4_client *cl; | |
0eb6f20a | 3789 | __be32 status; |
38c2f4b1 BF |
3790 | |
3791 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3792 | return nfserr_bad_stateid; | |
0eb6f20a BF |
3793 | status = lookup_clientid(&stateid->si_opaque.so_clid, sessions, |
3794 | nn, &cl); | |
a8a7c677 TM |
3795 | if (status == nfserr_stale_clientid) { |
3796 | if (sessions) | |
3797 | return nfserr_bad_stateid; | |
38c2f4b1 | 3798 | return nfserr_stale_stateid; |
a8a7c677 | 3799 | } |
0eb6f20a BF |
3800 | if (status) |
3801 | return status; | |
38c2f4b1 BF |
3802 | *s = find_stateid_by_type(cl, stateid, typemask); |
3803 | if (!*s) | |
3804 | return nfserr_bad_stateid; | |
3805 | return nfs_ok; | |
38c2f4b1 BF |
3806 | } |
3807 | ||
1da177e4 LT |
3808 | /* |
3809 | * Checks for stateid operations | |
3810 | */ | |
b37ad28b | 3811 | __be32 |
5ccb0066 | 3812 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3813 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3814 | { |
69064a27 | 3815 | struct nfs4_stid *s; |
dcef0413 | 3816 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3817 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3818 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3819 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3820 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 3821 | struct file *file = NULL; |
b37ad28b | 3822 | __be32 status; |
1da177e4 | 3823 | |
1da177e4 LT |
3824 | if (filpp) |
3825 | *filpp = NULL; | |
3826 | ||
5ccb0066 | 3827 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3828 | return nfserr_grace; |
3829 | ||
3830 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3831 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3832 | |
14bcab1a TM |
3833 | nfs4_lock_state(); |
3834 | ||
db24b3b4 JL |
3835 | status = nfsd4_lookup_stateid(stateid, |
3836 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, | |
3837 | &s, cstate->minorversion, nn); | |
38c2f4b1 | 3838 | if (status) |
14bcab1a | 3839 | goto out; |
69064a27 BF |
3840 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3841 | if (status) | |
3842 | goto out; | |
f7a4d872 BF |
3843 | switch (s->sc_type) { |
3844 | case NFS4_DELEG_STID: | |
69064a27 | 3845 | dp = delegstateid(s); |
dc9bf700 BF |
3846 | status = nfs4_check_delegmode(dp, flags); |
3847 | if (status) | |
3848 | goto out; | |
43b0178e | 3849 | if (filpp) { |
14bcab1a TM |
3850 | file = dp->dl_file->fi_deleg_file; |
3851 | if (!file) { | |
063b0fb9 BF |
3852 | WARN_ON_ONCE(1); |
3853 | status = nfserr_serverfault; | |
3854 | goto out; | |
3855 | } | |
43b0178e | 3856 | } |
f7a4d872 BF |
3857 | break; |
3858 | case NFS4_OPEN_STID: | |
3859 | case NFS4_LOCK_STID: | |
69064a27 | 3860 | stp = openlockstateid(s); |
f7a4d872 BF |
3861 | status = nfs4_check_fh(current_fh, stp); |
3862 | if (status) | |
1da177e4 | 3863 | goto out; |
fe0750e5 | 3864 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3865 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3866 | goto out; |
a4455be0 BF |
3867 | status = nfs4_check_openmode(stp, flags); |
3868 | if (status) | |
1da177e4 | 3869 | goto out; |
f9d7562f BF |
3870 | if (filpp) { |
3871 | if (flags & RD_STATE) | |
14bcab1a | 3872 | file = find_readable_file(stp->st_file); |
f9d7562f | 3873 | else |
14bcab1a | 3874 | file = find_writeable_file(stp->st_file); |
f9d7562f | 3875 | } |
f7a4d872 BF |
3876 | break; |
3877 | default: | |
14bcab1a TM |
3878 | status = nfserr_bad_stateid; |
3879 | goto out; | |
1da177e4 LT |
3880 | } |
3881 | status = nfs_ok; | |
14bcab1a TM |
3882 | if (file) |
3883 | *filpp = get_file(file); | |
1da177e4 | 3884 | out: |
14bcab1a | 3885 | nfs4_unlock_state(); |
1da177e4 LT |
3886 | return status; |
3887 | } | |
3888 | ||
e1ca12df | 3889 | static __be32 |
dcef0413 | 3890 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3891 | { |
a1b8ff4c BF |
3892 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
3893 | ||
3894 | if (check_for_locks(stp->st_file, lo)) | |
e1ca12df | 3895 | return nfserr_locks_held; |
c53530da | 3896 | release_lockowner_if_empty(lo); |
e1ca12df BS |
3897 | return nfs_ok; |
3898 | } | |
3899 | ||
17456804 BS |
3900 | /* |
3901 | * Test if the stateid is valid | |
3902 | */ | |
3903 | __be32 | |
3904 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3905 | struct nfsd4_test_stateid *test_stateid) | |
3906 | { | |
03cfb420 BS |
3907 | struct nfsd4_test_stateid_id *stateid; |
3908 | struct nfs4_client *cl = cstate->session->se_client; | |
3909 | ||
3910 | nfs4_lock_state(); | |
3911 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3912 | stateid->ts_id_status = |
3913 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3914 | nfs4_unlock_state(); |
3915 | ||
17456804 BS |
3916 | return nfs_ok; |
3917 | } | |
3918 | ||
e1ca12df BS |
3919 | __be32 |
3920 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3921 | struct nfsd4_free_stateid *free_stateid) | |
3922 | { | |
3923 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3924 | struct nfs4_stid *s; |
3bd64a5b | 3925 | struct nfs4_delegation *dp; |
38c2f4b1 | 3926 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3927 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3928 | |
3929 | nfs4_lock_state(); | |
38c2f4b1 | 3930 | s = find_stateid(cl, stateid); |
2da1cec7 | 3931 | if (!s) |
81b82965 | 3932 | goto out; |
2da1cec7 BF |
3933 | switch (s->sc_type) { |
3934 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3935 | ret = nfserr_locks_held; |
3936 | goto out; | |
2da1cec7 BF |
3937 | case NFS4_OPEN_STID: |
3938 | case NFS4_LOCK_STID: | |
3939 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3940 | if (ret) | |
3941 | goto out; | |
3942 | if (s->sc_type == NFS4_LOCK_STID) | |
3943 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3944 | else | |
3945 | ret = nfserr_locks_held; | |
f7a4d872 | 3946 | break; |
3bd64a5b BF |
3947 | case NFS4_REVOKED_DELEG_STID: |
3948 | dp = delegstateid(s); | |
3949 | destroy_revoked_delegation(dp); | |
3950 | ret = nfs_ok; | |
3951 | break; | |
f7a4d872 BF |
3952 | default: |
3953 | ret = nfserr_bad_stateid; | |
e1ca12df | 3954 | } |
e1ca12df BS |
3955 | out: |
3956 | nfs4_unlock_state(); | |
3957 | return ret; | |
3958 | } | |
3959 | ||
4c4cd222 N |
3960 | static inline int |
3961 | setlkflg (int type) | |
3962 | { | |
3963 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3964 | RD_STATE : WR_STATE; | |
3965 | } | |
1da177e4 | 3966 | |
dcef0413 | 3967 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3968 | { |
3969 | struct svc_fh *current_fh = &cstate->current_fh; | |
3970 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3971 | __be32 status; | |
3972 | ||
c0a5d93e BF |
3973 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3974 | if (status) | |
3975 | return status; | |
3bd64a5b BF |
3976 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
3977 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
3978 | /* |
3979 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
3980 | * nfserr_replay_me from the previous step, and |
3981 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
3982 | */ |
3983 | return nfserr_bad_stateid; | |
3984 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3985 | if (status) | |
3986 | return status; | |
3987 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3988 | } |
3989 | ||
1da177e4 LT |
3990 | /* |
3991 | * Checks for sequence id mutating operations. | |
3992 | */ | |
b37ad28b | 3993 | static __be32 |
dd453dfd | 3994 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3995 | stateid_t *stateid, char typemask, |
3320fef1 SK |
3996 | struct nfs4_ol_stateid **stpp, |
3997 | struct nfsd_net *nn) | |
1da177e4 | 3998 | { |
0836f587 | 3999 | __be32 status; |
38c2f4b1 | 4000 | struct nfs4_stid *s; |
e17f99b7 | 4001 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4002 | |
8c10cbdb BH |
4003 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4004 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4005 | |
1da177e4 | 4006 | *stpp = NULL; |
3320fef1 SK |
4007 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
4008 | cstate->minorversion, nn); | |
c0a5d93e BF |
4009 | if (status) |
4010 | return status; | |
e17f99b7 | 4011 | stp = openlockstateid(s); |
3d74e6a5 | 4012 | if (!nfsd4_has_session(cstate)) |
e17f99b7 | 4013 | cstate->replay_owner = stp->st_stateowner; |
1da177e4 | 4014 | |
e17f99b7 TM |
4015 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
4016 | if (!status) | |
4017 | *stpp = stp; | |
4018 | return status; | |
c0a5d93e | 4019 | } |
39325bd0 | 4020 | |
3320fef1 SK |
4021 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4022 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4023 | { |
4024 | __be32 status; | |
4025 | struct nfs4_openowner *oo; | |
1da177e4 | 4026 | |
c0a5d93e | 4027 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 4028 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
4029 | if (status) |
4030 | return status; | |
c0a5d93e | 4031 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 4032 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 4033 | return nfserr_bad_stateid; |
3a4f98bb | 4034 | return nfs_ok; |
1da177e4 LT |
4035 | } |
4036 | ||
b37ad28b | 4037 | __be32 |
ca364317 | 4038 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4039 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4040 | { |
b37ad28b | 4041 | __be32 status; |
fe0750e5 | 4042 | struct nfs4_openowner *oo; |
dcef0413 | 4043 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4044 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4045 | |
a6a9f18f AV |
4046 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4047 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4048 | |
ca364317 | 4049 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4050 | if (status) |
4051 | return status; | |
1da177e4 LT |
4052 | |
4053 | nfs4_lock_state(); | |
4054 | ||
9072d5c6 | 4055 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4056 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4057 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4058 | if (status) |
68b66e82 | 4059 | goto out; |
fe0750e5 | 4060 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4061 | status = nfserr_bad_stateid; |
dad1c067 | 4062 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 4063 | goto out; |
dad1c067 | 4064 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4065 | update_stateid(&stp->st_stid.sc_stateid); |
4066 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4067 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4068 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4069 | |
2a4317c5 | 4070 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4071 | status = nfs_ok; |
1da177e4 | 4072 | out: |
9411b1d4 | 4073 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4074 | if (!cstate->replay_owner) |
4075 | nfs4_unlock_state(); | |
1da177e4 LT |
4076 | return status; |
4077 | } | |
4078 | ||
6409a5a6 | 4079 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4080 | { |
82c5ff1b | 4081 | if (!test_access(access, stp)) |
6409a5a6 BF |
4082 | return; |
4083 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 4084 | clear_access(access, stp); |
6409a5a6 | 4085 | } |
f197c271 | 4086 | |
6409a5a6 BF |
4087 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4088 | { | |
4089 | switch (to_access) { | |
4090 | case NFS4_SHARE_ACCESS_READ: | |
4091 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4092 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4093 | break; | |
4094 | case NFS4_SHARE_ACCESS_WRITE: | |
4095 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4096 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4097 | break; | |
4098 | case NFS4_SHARE_ACCESS_BOTH: | |
4099 | break; | |
4100 | default: | |
063b0fb9 | 4101 | WARN_ON_ONCE(1); |
1da177e4 LT |
4102 | } |
4103 | } | |
4104 | ||
4105 | static void | |
ce0fc43c | 4106 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
4107 | { |
4108 | int i; | |
4109 | for (i = 0; i < 4; i++) { | |
4110 | if ((i & deny) != i) | |
ce0fc43c | 4111 | clear_deny(i, stp); |
1da177e4 LT |
4112 | } |
4113 | } | |
4114 | ||
b37ad28b | 4115 | __be32 |
ca364317 BF |
4116 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4117 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4118 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4119 | { |
b37ad28b | 4120 | __be32 status; |
dcef0413 | 4121 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4122 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4123 | |
a6a9f18f AV |
4124 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4125 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4126 | |
c30e92df | 4127 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4128 | if (od->od_deleg_want) |
4129 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4130 | od->od_deleg_want); | |
1da177e4 LT |
4131 | |
4132 | nfs4_lock_state(); | |
c0a5d93e | 4133 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4134 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4135 | if (status) |
1da177e4 | 4136 | goto out; |
1da177e4 | 4137 | status = nfserr_inval; |
82c5ff1b JL |
4138 | if (!test_access(od->od_share_access, stp)) { |
4139 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
4140 | stp->st_access_bmap, od->od_share_access); |
4141 | goto out; | |
4142 | } | |
ce0fc43c | 4143 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
4144 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
4145 | stp->st_deny_bmap, od->od_share_deny); | |
4146 | goto out; | |
4147 | } | |
6409a5a6 | 4148 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4149 | |
ce0fc43c | 4150 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4151 | |
dcef0413 BF |
4152 | update_stateid(&stp->st_stid.sc_stateid); |
4153 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4154 | status = nfs_ok; |
4155 | out: | |
9411b1d4 | 4156 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4157 | if (!cstate->replay_owner) |
4158 | nfs4_unlock_state(); | |
1da177e4 LT |
4159 | return status; |
4160 | } | |
4161 | ||
f7a4d872 BF |
4162 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4163 | { | |
acf9295b TM |
4164 | struct nfs4_client *clp = s->st_stid.sc_client; |
4165 | struct nfs4_openowner *oo = openowner(s->st_stateowner); | |
4166 | ||
f7a4d872 | 4167 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
acf9295b TM |
4168 | unhash_open_stateid(s); |
4169 | ||
4170 | if (clp->cl_minorversion) { | |
4171 | free_generic_stateid(s); | |
4172 | if (list_empty(&oo->oo_owner.so_stateids)) | |
4173 | release_openowner(oo); | |
4174 | } else { | |
4175 | oo->oo_last_closed_stid = s; | |
4176 | /* | |
4177 | * In the 4.0 case we need to keep the owners around a | |
4178 | * little while to handle CLOSE replay. | |
4179 | */ | |
4180 | if (list_empty(&oo->oo_owner.so_stateids)) | |
4181 | move_to_close_lru(oo, clp->net); | |
4182 | } | |
38c387b5 BF |
4183 | } |
4184 | ||
1da177e4 LT |
4185 | /* |
4186 | * nfs4_unlock_state() called after encode | |
4187 | */ | |
b37ad28b | 4188 | __be32 |
ca364317 | 4189 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4190 | struct nfsd4_close *close) |
1da177e4 | 4191 | { |
b37ad28b | 4192 | __be32 status; |
dcef0413 | 4193 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4194 | struct net *net = SVC_NET(rqstp); |
4195 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4196 | |
a6a9f18f AV |
4197 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4198 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4199 | |
4200 | nfs4_lock_state(); | |
f7a4d872 BF |
4201 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4202 | &close->cl_stateid, | |
4203 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4204 | &stp, nn); |
9411b1d4 | 4205 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4206 | if (status) |
1da177e4 | 4207 | goto out; |
dcef0413 BF |
4208 | update_stateid(&stp->st_stid.sc_stateid); |
4209 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4210 | |
f7a4d872 | 4211 | nfsd4_close_open_stateid(stp); |
1da177e4 | 4212 | out: |
5ec094c1 BF |
4213 | if (!cstate->replay_owner) |
4214 | nfs4_unlock_state(); | |
1da177e4 LT |
4215 | return status; |
4216 | } | |
4217 | ||
b37ad28b | 4218 | __be32 |
ca364317 BF |
4219 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4220 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4221 | { |
203a8c8e BF |
4222 | struct nfs4_delegation *dp; |
4223 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4224 | struct nfs4_stid *s; |
b37ad28b | 4225 | __be32 status; |
3320fef1 | 4226 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4227 | |
ca364317 | 4228 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4229 | return status; |
1da177e4 LT |
4230 | |
4231 | nfs4_lock_state(); | |
3320fef1 SK |
4232 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
4233 | cstate->minorversion, nn); | |
38c2f4b1 | 4234 | if (status) |
203a8c8e | 4235 | goto out; |
38c2f4b1 | 4236 | dp = delegstateid(s); |
d5477a8d | 4237 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
4238 | if (status) |
4239 | goto out; | |
203a8c8e | 4240 | |
3bd64a5b | 4241 | destroy_delegation(dp); |
1da177e4 | 4242 | out: |
203a8c8e BF |
4243 | nfs4_unlock_state(); |
4244 | ||
1da177e4 LT |
4245 | return status; |
4246 | } | |
4247 | ||
4248 | ||
1da177e4 | 4249 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4250 | |
87df4de8 BH |
4251 | static inline u64 |
4252 | end_offset(u64 start, u64 len) | |
4253 | { | |
4254 | u64 end; | |
4255 | ||
4256 | end = start + len; | |
4257 | return end >= start ? end: NFS4_MAX_UINT64; | |
4258 | } | |
4259 | ||
4260 | /* last octet in a range */ | |
4261 | static inline u64 | |
4262 | last_byte_offset(u64 start, u64 len) | |
4263 | { | |
4264 | u64 end; | |
4265 | ||
063b0fb9 | 4266 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4267 | end = start + len; |
4268 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4269 | } | |
4270 | ||
1da177e4 LT |
4271 | /* |
4272 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4273 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4274 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4275 | * locking, this prevents us from being completely protocol-compliant. The | |
4276 | * real solution to this problem is to start using unsigned file offsets in | |
4277 | * the VFS, but this is a very deep change! | |
4278 | */ | |
4279 | static inline void | |
4280 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4281 | { | |
4282 | if (lock->fl_start < 0) | |
4283 | lock->fl_start = OFFSET_MAX; | |
4284 | if (lock->fl_end < 0) | |
4285 | lock->fl_end = OFFSET_MAX; | |
4286 | } | |
4287 | ||
d5b9026a N |
4288 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4289 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4290 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4291 | }; |
1da177e4 LT |
4292 | |
4293 | static inline void | |
4294 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4295 | { | |
fe0750e5 | 4296 | struct nfs4_lockowner *lo; |
1da177e4 | 4297 | |
d5b9026a | 4298 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4299 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4300 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4301 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4302 | if (!deny->ld_owner.data) |
4303 | /* We just don't care that much */ | |
4304 | goto nevermind; | |
fe0750e5 BF |
4305 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4306 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4307 | } else { |
7c13f344 BF |
4308 | nevermind: |
4309 | deny->ld_owner.len = 0; | |
4310 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4311 | deny->ld_clientid.cl_boot = 0; |
4312 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4313 | } |
4314 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4315 | deny->ld_length = NFS4_MAX_UINT64; |
4316 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4317 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4318 | deny->ld_type = NFS4_READ_LT; | |
4319 | if (fl->fl_type != F_RDLCK) | |
4320 | deny->ld_type = NFS4_WRITE_LT; | |
4321 | } | |
4322 | ||
fe0750e5 | 4323 | static struct nfs4_lockowner * |
b3c32bcd TM |
4324 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, |
4325 | struct nfsd_net *nn) | |
1da177e4 | 4326 | { |
b3c32bcd TM |
4327 | unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner); |
4328 | struct nfs4_stateowner *so; | |
1da177e4 | 4329 | |
b3c32bcd TM |
4330 | list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) { |
4331 | if (so->so_is_open_owner) | |
4332 | continue; | |
4333 | if (!same_owner_str(so, owner, clid)) | |
4334 | continue; | |
4335 | return lockowner(so); | |
1da177e4 LT |
4336 | } |
4337 | return NULL; | |
4338 | } | |
4339 | ||
4340 | /* | |
4341 | * Alloc a lock owner structure. | |
4342 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4343 | * occurred. |
1da177e4 | 4344 | * |
16bfdaaf | 4345 | * strhashval = ownerstr_hashval |
1da177e4 | 4346 | */ |
fe0750e5 | 4347 | static struct nfs4_lockowner * |
dcef0413 | 4348 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4349 | struct nfs4_lockowner *lo; |
b3c32bcd | 4350 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 4351 | |
fe0750e5 BF |
4352 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4353 | if (!lo) | |
1da177e4 | 4354 | return NULL; |
fe0750e5 BF |
4355 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4356 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4357 | /* It is the openowner seqid that will be incremented in encode in the |
4358 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 | 4359 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
b3c32bcd | 4360 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
fe0750e5 | 4361 | return lo; |
1da177e4 LT |
4362 | } |
4363 | ||
dcef0413 BF |
4364 | static struct nfs4_ol_stateid * |
4365 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4366 | { |
dcef0413 | 4367 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4368 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4369 | |
996e0938 | 4370 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4371 | if (stp == NULL) |
6136d2b4 | 4372 | return NULL; |
3abdb607 | 4373 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4374 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4375 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4376 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4377 | get_nfs4_file(fp); |
1da177e4 | 4378 | stp->st_file = fp; |
0997b173 | 4379 | stp->st_access_bmap = 0; |
1da177e4 | 4380 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4381 | stp->st_openstp = open_stp; |
3c87b9b7 | 4382 | list_add(&stp->st_locks, &open_stp->st_locks); |
1da177e4 LT |
4383 | return stp; |
4384 | } | |
4385 | ||
c53530da JL |
4386 | static struct nfs4_ol_stateid * |
4387 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
4388 | { | |
4389 | struct nfs4_ol_stateid *lst; | |
4390 | ||
4391 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
4392 | if (lst->st_file == fp) | |
4393 | return lst; | |
4394 | } | |
4395 | return NULL; | |
4396 | } | |
4397 | ||
4398 | ||
fd39ca9a | 4399 | static int |
1da177e4 LT |
4400 | check_lock_length(u64 offset, u64 length) |
4401 | { | |
87df4de8 | 4402 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4403 | LOFF_OVERFLOW(offset, length))); |
4404 | } | |
4405 | ||
dcef0413 | 4406 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4407 | { |
4408 | struct nfs4_file *fp = lock_stp->st_file; | |
4409 | int oflag = nfs4_access_to_omode(access); | |
4410 | ||
82c5ff1b | 4411 | if (test_access(access, lock_stp)) |
0997b173 BF |
4412 | return; |
4413 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4414 | set_access(access, lock_stp); |
0997b173 BF |
4415 | } |
4416 | ||
2355c596 | 4417 | 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 |
4418 | { |
4419 | struct nfs4_file *fi = ost->st_file; | |
4420 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4421 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4422 | struct nfs4_lockowner *lo; | |
4423 | unsigned int strhashval; | |
20e9e2bc | 4424 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4425 | |
b3c32bcd | 4426 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn); |
c53530da JL |
4427 | if (!lo) { |
4428 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, | |
4429 | &lock->v.new.owner); | |
4430 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4431 | if (lo == NULL) | |
4432 | return nfserr_jukebox; | |
4433 | } else { | |
4434 | /* with an existing lockowner, seqids must be the same */ | |
4435 | if (!cstate->minorversion && | |
4436 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
64a284d0 | 4437 | return nfserr_bad_seqid; |
64a284d0 | 4438 | } |
c53530da JL |
4439 | |
4440 | *lst = find_lock_stateid(lo, fi); | |
64a284d0 | 4441 | if (*lst == NULL) { |
c53530da JL |
4442 | *lst = alloc_init_lock_stateid(lo, fi, ost); |
4443 | if (*lst == NULL) { | |
4444 | release_lockowner_if_empty(lo); | |
4445 | return nfserr_jukebox; | |
4446 | } | |
4447 | *new = true; | |
64a284d0 | 4448 | } |
64a284d0 BF |
4449 | return nfs_ok; |
4450 | } | |
4451 | ||
1da177e4 LT |
4452 | /* |
4453 | * LOCK operation | |
4454 | */ | |
b37ad28b | 4455 | __be32 |
ca364317 | 4456 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4457 | struct nfsd4_lock *lock) |
1da177e4 | 4458 | { |
fe0750e5 BF |
4459 | struct nfs4_openowner *open_sop = NULL; |
4460 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4461 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4462 | struct file *filp = NULL; |
21179d81 JL |
4463 | struct file_lock *file_lock = NULL; |
4464 | struct file_lock *conflock = NULL; | |
b37ad28b | 4465 | __be32 status = 0; |
64a284d0 | 4466 | bool new_state = false; |
b34f27aa | 4467 | int lkflg; |
b8dd7b9a | 4468 | int err; |
3320fef1 SK |
4469 | struct net *net = SVC_NET(rqstp); |
4470 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4471 | |
4472 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4473 | (long long) lock->lk_offset, | |
4474 | (long long) lock->lk_length); | |
4475 | ||
1da177e4 LT |
4476 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4477 | return nfserr_inval; | |
4478 | ||
ca364317 | 4479 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4480 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4481 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4482 | return status; | |
4483 | } | |
4484 | ||
1da177e4 LT |
4485 | nfs4_lock_state(); |
4486 | ||
4487 | if (lock->lk_is_new) { | |
dcef0413 | 4488 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4489 | |
4490 | if (nfsd4_has_session(cstate)) | |
4491 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4492 | memcpy(&lock->v.new.clientid, | |
4493 | &cstate->session->se_client->cl_clientid, | |
4494 | sizeof(clientid_t)); | |
4495 | ||
1da177e4 | 4496 | status = nfserr_stale_clientid; |
2c142baa | 4497 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4498 | goto out; |
1da177e4 | 4499 | |
1da177e4 | 4500 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4501 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4502 | lock->lk_new_open_seqid, |
4503 | &lock->lk_new_open_stateid, | |
3320fef1 | 4504 | &open_stp, nn); |
37515177 | 4505 | if (status) |
1da177e4 | 4506 | goto out; |
fe0750e5 | 4507 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4508 | status = nfserr_bad_stateid; |
684e5638 | 4509 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4510 | &lock->v.new.clientid)) |
4511 | goto out; | |
64a284d0 BF |
4512 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4513 | &lock_stp, &new_state); | |
e1aaa891 | 4514 | } else |
dd453dfd | 4515 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4516 | lock->lk_old_lock_seqid, |
4517 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4518 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4519 | if (status) |
4520 | goto out; | |
64a284d0 | 4521 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4522 | |
b34f27aa BF |
4523 | lkflg = setlkflg(lock->lk_type); |
4524 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4525 | if (status) | |
4526 | goto out; | |
4527 | ||
0dd395dc | 4528 | status = nfserr_grace; |
3320fef1 | 4529 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4530 | goto out; |
4531 | status = nfserr_no_grace; | |
3320fef1 | 4532 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4533 | goto out; |
4534 | ||
21179d81 JL |
4535 | file_lock = locks_alloc_lock(); |
4536 | if (!file_lock) { | |
4537 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4538 | status = nfserr_jukebox; | |
4539 | goto out; | |
4540 | } | |
4541 | ||
4542 | locks_init_lock(file_lock); | |
1da177e4 LT |
4543 | switch (lock->lk_type) { |
4544 | case NFS4_READ_LT: | |
4545 | case NFS4_READW_LT: | |
0997b173 BF |
4546 | filp = find_readable_file(lock_stp->st_file); |
4547 | if (filp) | |
4548 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4549 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4550 | break; |
1da177e4 LT |
4551 | case NFS4_WRITE_LT: |
4552 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4553 | filp = find_writeable_file(lock_stp->st_file); |
4554 | if (filp) | |
4555 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4556 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4557 | break; |
1da177e4 LT |
4558 | default: |
4559 | status = nfserr_inval; | |
4560 | goto out; | |
4561 | } | |
f9d7562f BF |
4562 | if (!filp) { |
4563 | status = nfserr_openmode; | |
4564 | goto out; | |
4565 | } | |
21179d81 JL |
4566 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
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 = lock->lk_offset; | |
4572 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4573 | nfs4_transform_lock_offset(file_lock); | |
4574 | ||
4575 | conflock = locks_alloc_lock(); | |
4576 | if (!conflock) { | |
4577 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4578 | status = nfserr_jukebox; | |
4579 | goto out; | |
4580 | } | |
1da177e4 | 4581 | |
21179d81 | 4582 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4583 | switch (-err) { |
1da177e4 | 4584 | case 0: /* success! */ |
dcef0413 BF |
4585 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4586 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4587 | sizeof(stateid_t)); |
b8dd7b9a | 4588 | status = 0; |
eb76b3fd AA |
4589 | break; |
4590 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4591 | status = nfserr_denied; | |
4592 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4593 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4594 | break; |
1da177e4 LT |
4595 | case (EDEADLK): |
4596 | status = nfserr_deadlock; | |
eb76b3fd | 4597 | break; |
3e772463 | 4598 | default: |
fd85b817 | 4599 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4600 | status = nfserrno(err); |
eb76b3fd | 4601 | break; |
1da177e4 | 4602 | } |
1da177e4 | 4603 | out: |
64a284d0 | 4604 | if (status && new_state) |
c53530da | 4605 | release_lock_stateid(lock_stp); |
9411b1d4 | 4606 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4607 | if (!cstate->replay_owner) |
4608 | nfs4_unlock_state(); | |
21179d81 JL |
4609 | if (file_lock) |
4610 | locks_free_lock(file_lock); | |
4611 | if (conflock) | |
4612 | locks_free_lock(conflock); | |
1da177e4 LT |
4613 | return status; |
4614 | } | |
4615 | ||
55ef1274 BF |
4616 | /* |
4617 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4618 | * so we do a temporary open here just to get an open file to pass to | |
4619 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4620 | * inode operation.) | |
4621 | */ | |
04da6e9d | 4622 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4623 | { |
4624 | struct file *file; | |
04da6e9d AV |
4625 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4626 | if (!err) { | |
4627 | err = nfserrno(vfs_test_lock(file, lock)); | |
4628 | nfsd_close(file); | |
4629 | } | |
55ef1274 BF |
4630 | return err; |
4631 | } | |
4632 | ||
1da177e4 LT |
4633 | /* |
4634 | * LOCKT operation | |
4635 | */ | |
b37ad28b | 4636 | __be32 |
ca364317 BF |
4637 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4638 | struct nfsd4_lockt *lockt) | |
1da177e4 | 4639 | { |
21179d81 | 4640 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4641 | struct nfs4_lockowner *lo; |
b37ad28b | 4642 | __be32 status; |
7f2210fa | 4643 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4644 | |
5ccb0066 | 4645 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4646 | return nfserr_grace; |
4647 | ||
4648 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4649 | return nfserr_inval; | |
4650 | ||
1da177e4 LT |
4651 | nfs4_lock_state(); |
4652 | ||
9b2ef62b BF |
4653 | if (!nfsd4_has_session(cstate)) { |
4654 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); | |
4655 | if (status) | |
4656 | goto out; | |
4657 | } | |
1da177e4 | 4658 | |
75c096f7 | 4659 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4660 | goto out; |
1da177e4 | 4661 | |
21179d81 JL |
4662 | file_lock = locks_alloc_lock(); |
4663 | if (!file_lock) { | |
4664 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4665 | status = nfserr_jukebox; | |
4666 | goto out; | |
4667 | } | |
4668 | locks_init_lock(file_lock); | |
1da177e4 LT |
4669 | switch (lockt->lt_type) { |
4670 | case NFS4_READ_LT: | |
4671 | case NFS4_READW_LT: | |
21179d81 | 4672 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4673 | break; |
4674 | case NFS4_WRITE_LT: | |
4675 | case NFS4_WRITEW_LT: | |
21179d81 | 4676 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4677 | break; |
4678 | default: | |
2fdada03 | 4679 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4680 | status = nfserr_inval; |
4681 | goto out; | |
4682 | } | |
4683 | ||
b3c32bcd | 4684 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4685 | if (lo) |
21179d81 JL |
4686 | file_lock->fl_owner = (fl_owner_t)lo; |
4687 | file_lock->fl_pid = current->tgid; | |
4688 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4689 | |
21179d81 JL |
4690 | file_lock->fl_start = lockt->lt_offset; |
4691 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4692 | |
21179d81 | 4693 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4694 | |
21179d81 | 4695 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4696 | if (status) |
fd85b817 | 4697 | goto out; |
04da6e9d | 4698 | |
21179d81 | 4699 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4700 | status = nfserr_denied; |
21179d81 | 4701 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4702 | } |
4703 | out: | |
4704 | nfs4_unlock_state(); | |
21179d81 JL |
4705 | if (file_lock) |
4706 | locks_free_lock(file_lock); | |
1da177e4 LT |
4707 | return status; |
4708 | } | |
4709 | ||
b37ad28b | 4710 | __be32 |
ca364317 | 4711 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4712 | struct nfsd4_locku *locku) |
1da177e4 | 4713 | { |
dcef0413 | 4714 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4715 | struct file *filp = NULL; |
21179d81 | 4716 | struct file_lock *file_lock = NULL; |
b37ad28b | 4717 | __be32 status; |
b8dd7b9a | 4718 | int err; |
3320fef1 SK |
4719 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4720 | ||
1da177e4 LT |
4721 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4722 | (long long) locku->lu_offset, | |
4723 | (long long) locku->lu_length); | |
4724 | ||
4725 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4726 | return nfserr_inval; | |
4727 | ||
4728 | nfs4_lock_state(); | |
4729 | ||
9072d5c6 | 4730 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4731 | &locku->lu_stateid, NFS4_LOCK_STID, |
4732 | &stp, nn); | |
9072d5c6 | 4733 | if (status) |
1da177e4 | 4734 | goto out; |
f9d7562f BF |
4735 | filp = find_any_file(stp->st_file); |
4736 | if (!filp) { | |
4737 | status = nfserr_lock_range; | |
4738 | goto out; | |
4739 | } | |
21179d81 JL |
4740 | file_lock = locks_alloc_lock(); |
4741 | if (!file_lock) { | |
4742 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4743 | status = nfserr_jukebox; | |
4744 | goto out; | |
4745 | } | |
4746 | locks_init_lock(file_lock); | |
4747 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 4748 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
4749 | file_lock->fl_pid = current->tgid; |
4750 | file_lock->fl_file = filp; | |
4751 | file_lock->fl_flags = FL_POSIX; | |
4752 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4753 | file_lock->fl_start = locku->lu_offset; | |
4754 | ||
4755 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4756 | locku->lu_length); | |
4757 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 4758 | |
21179d81 | 4759 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4760 | if (err) { |
fd85b817 | 4761 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4762 | goto out_nfserr; |
4763 | } | |
dcef0413 BF |
4764 | update_stateid(&stp->st_stid.sc_stateid); |
4765 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4766 | |
4767 | out: | |
9411b1d4 | 4768 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
4769 | if (!cstate->replay_owner) |
4770 | nfs4_unlock_state(); | |
21179d81 JL |
4771 | if (file_lock) |
4772 | locks_free_lock(file_lock); | |
1da177e4 LT |
4773 | return status; |
4774 | ||
4775 | out_nfserr: | |
b8dd7b9a | 4776 | status = nfserrno(err); |
1da177e4 LT |
4777 | goto out; |
4778 | } | |
4779 | ||
4780 | /* | |
4781 | * returns | |
4782 | * 1: locks held by lockowner | |
4783 | * 0: no locks held by lockowner | |
4784 | */ | |
4785 | static int | |
fe0750e5 | 4786 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4787 | { |
4788 | struct file_lock **flpp; | |
f9d7562f | 4789 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4790 | int status = 0; |
4791 | ||
1c8c601a | 4792 | spin_lock(&inode->i_lock); |
1da177e4 | 4793 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4794 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4795 | status = 1; |
4796 | goto out; | |
796dadfd | 4797 | } |
1da177e4 LT |
4798 | } |
4799 | out: | |
1c8c601a | 4800 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
4801 | return status; |
4802 | } | |
4803 | ||
b37ad28b | 4804 | __be32 |
b591480b BF |
4805 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4806 | struct nfsd4_compound_state *cstate, | |
4807 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4808 | { |
4809 | clientid_t *clid = &rlockowner->rl_clientid; | |
fd44907c | 4810 | struct nfs4_stateowner *sop = NULL, *tmp; |
fe0750e5 | 4811 | struct nfs4_lockowner *lo; |
dcef0413 | 4812 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4813 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
16bfdaaf | 4814 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4815 | __be32 status; |
7f2210fa | 4816 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4817 | |
4818 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4819 | clid->cl_boot, clid->cl_id); | |
4820 | ||
1da177e4 LT |
4821 | nfs4_lock_state(); |
4822 | ||
9b2ef62b BF |
4823 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
4824 | if (status) | |
4825 | goto out; | |
4826 | ||
3e9e3dbe | 4827 | status = nfserr_locks_held; |
06f1f864 | 4828 | |
fd44907c JL |
4829 | /* Find the matching lock stateowner */ |
4830 | list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) { | |
4831 | if (tmp->so_is_open_owner) | |
06f1f864 | 4832 | continue; |
fd44907c JL |
4833 | if (same_owner_str(tmp, owner, clid)) { |
4834 | sop = tmp; | |
4835 | break; | |
1da177e4 | 4836 | } |
3e9e3dbe | 4837 | } |
fd44907c JL |
4838 | |
4839 | /* No matching owner found, maybe a replay? Just declare victory... */ | |
4840 | if (!sop) { | |
4841 | status = nfs_ok; | |
4842 | goto out; | |
4843 | } | |
4844 | ||
4845 | lo = lockowner(sop); | |
4846 | /* see if there are still any locks associated with it */ | |
4847 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
4848 | if (check_for_locks(stp->st_file, lo)) | |
4849 | goto out; | |
1da177e4 | 4850 | } |
fd44907c JL |
4851 | |
4852 | status = nfs_ok; | |
4853 | release_lockowner(lo); | |
1da177e4 LT |
4854 | out: |
4855 | nfs4_unlock_state(); | |
4856 | return status; | |
4857 | } | |
4858 | ||
4859 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4860 | alloc_reclaim(void) |
1da177e4 | 4861 | { |
a55370a3 | 4862 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4863 | } |
4864 | ||
0ce0c2b5 | 4865 | bool |
52e19c09 | 4866 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4867 | { |
0ce0c2b5 | 4868 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4869 | |
52e19c09 | 4870 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4871 | return (crp && crp->cr_clp); |
c7b9a459 N |
4872 | } |
4873 | ||
1da177e4 LT |
4874 | /* |
4875 | * failure => all reset bets are off, nfserr_no_grace... | |
4876 | */ | |
772a9bbb | 4877 | struct nfs4_client_reclaim * |
52e19c09 | 4878 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4879 | { |
4880 | unsigned int strhashval; | |
772a9bbb | 4881 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4882 | |
a55370a3 N |
4883 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4884 | crp = alloc_reclaim(); | |
772a9bbb JL |
4885 | if (crp) { |
4886 | strhashval = clientstr_hashval(name); | |
4887 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4888 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4889 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4890 | crp->cr_clp = NULL; |
52e19c09 | 4891 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4892 | } |
4893 | return crp; | |
1da177e4 LT |
4894 | } |
4895 | ||
ce30e539 | 4896 | void |
52e19c09 | 4897 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4898 | { |
4899 | list_del(&crp->cr_strhash); | |
4900 | kfree(crp); | |
52e19c09 | 4901 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4902 | } |
4903 | ||
2a4317c5 | 4904 | void |
52e19c09 | 4905 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4906 | { |
4907 | struct nfs4_client_reclaim *crp = NULL; | |
4908 | int i; | |
4909 | ||
1da177e4 | 4910 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4911 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4912 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4913 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4914 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4915 | } |
4916 | } | |
063b0fb9 | 4917 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4918 | } |
4919 | ||
4920 | /* | |
4921 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4922 | struct nfs4_client_reclaim * |
52e19c09 | 4923 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4924 | { |
4925 | unsigned int strhashval; | |
1da177e4 LT |
4926 | struct nfs4_client_reclaim *crp = NULL; |
4927 | ||
278c931c | 4928 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4929 | |
278c931c | 4930 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4931 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4932 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4933 | return crp; |
4934 | } | |
4935 | } | |
4936 | return NULL; | |
4937 | } | |
4938 | ||
4939 | /* | |
4940 | * Called from OPEN. Look for clientid in reclaim list. | |
4941 | */ | |
b37ad28b | 4942 | __be32 |
3320fef1 | 4943 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4944 | { |
a52d726b JL |
4945 | struct nfs4_client *clp; |
4946 | ||
4947 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4948 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4949 | if (clp == NULL) |
4950 | return nfserr_reclaim_bad; | |
4951 | ||
4952 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4953 | } |
4954 | ||
65178db4 BS |
4955 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4956 | ||
44e34da6 BS |
4957 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4958 | { | |
221a6876 BF |
4959 | if (mark_client_expired(clp)) |
4960 | return 0; | |
44e34da6 BS |
4961 | expire_client(clp); |
4962 | return 1; | |
4963 | } | |
4964 | ||
184c1847 BS |
4965 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4966 | { | |
4967 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4968 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4969 | printk(KERN_INFO "NFS Client: %s\n", buf); |
4970 | return 1; | |
4971 | } | |
4972 | ||
4973 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
4974 | const char *type) | |
4975 | { | |
4976 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4977 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4978 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
4979 | } | |
4980 | ||
3c87b9b7 TM |
4981 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
4982 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
4983 | { |
4984 | struct nfs4_openowner *oop; | |
fc29171f | 4985 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 4986 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
4987 | u64 count = 0; |
4988 | ||
4989 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
4990 | list_for_each_entry_safe(stp, st_next, |
4991 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
4992 | list_for_each_entry_safe(lst, lst_next, | |
4993 | &stp->st_locks, st_locks) { | |
fc29171f | 4994 | if (func) |
3c87b9b7 | 4995 | func(lst); |
fc29171f BS |
4996 | if (++count == max) |
4997 | return count; | |
4998 | } | |
4999 | } | |
5000 | } | |
5001 | ||
5002 | return count; | |
5003 | } | |
5004 | ||
5005 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5006 | { | |
3c87b9b7 | 5007 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5008 | } |
5009 | ||
184c1847 BS |
5010 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5011 | { | |
5012 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5013 | nfsd_print_count(clp, count, "locked files"); | |
5014 | return count; | |
5015 | } | |
5016 | ||
4dbdbda8 BS |
5017 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5018 | { | |
5019 | struct nfs4_openowner *oop, *next; | |
5020 | u64 count = 0; | |
5021 | ||
5022 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5023 | if (func) | |
5024 | func(oop); | |
5025 | if (++count == max) | |
5026 | break; | |
5027 | } | |
5028 | ||
5029 | return count; | |
5030 | } | |
5031 | ||
5032 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5033 | { | |
5034 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5035 | } | |
5036 | ||
184c1847 BS |
5037 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5038 | { | |
5039 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5040 | nfsd_print_count(clp, count, "open files"); | |
5041 | return count; | |
5042 | } | |
5043 | ||
269de30f BS |
5044 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5045 | struct list_head *victims) | |
5046 | { | |
5047 | struct nfs4_delegation *dp, *next; | |
5048 | u64 count = 0; | |
5049 | ||
cdc97505 | 5050 | lockdep_assert_held(&state_lock); |
269de30f BS |
5051 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
5052 | if (victims) | |
5053 | list_move(&dp->dl_recall_lru, victims); | |
5054 | if (++count == max) | |
5055 | break; | |
5056 | } | |
5057 | return count; | |
5058 | } | |
5059 | ||
5060 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5061 | { | |
5062 | struct nfs4_delegation *dp, *next; | |
5063 | LIST_HEAD(victims); | |
5064 | u64 count; | |
5065 | ||
cdc97505 | 5066 | spin_lock(&state_lock); |
269de30f | 5067 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5068 | spin_unlock(&state_lock); |
269de30f BS |
5069 | |
5070 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
3bd64a5b | 5071 | revoke_delegation(dp); |
269de30f BS |
5072 | |
5073 | return count; | |
5074 | } | |
5075 | ||
5076 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5077 | { | |
5078 | struct nfs4_delegation *dp, *next; | |
5079 | LIST_HEAD(victims); | |
5080 | u64 count; | |
5081 | ||
cdc97505 | 5082 | spin_lock(&state_lock); |
269de30f BS |
5083 | count = nfsd_find_all_delegations(clp, max, &victims); |
5084 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
5085 | nfsd_break_one_deleg(dp); | |
cdc97505 | 5086 | spin_unlock(&state_lock); |
269de30f BS |
5087 | |
5088 | return count; | |
5089 | } | |
5090 | ||
184c1847 BS |
5091 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5092 | { | |
5093 | u64 count = 0; | |
5094 | ||
cdc97505 | 5095 | spin_lock(&state_lock); |
184c1847 | 5096 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5097 | spin_unlock(&state_lock); |
184c1847 BS |
5098 | |
5099 | nfsd_print_count(clp, count, "delegations"); | |
5100 | return count; | |
5101 | } | |
5102 | ||
44e34da6 | 5103 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5104 | { |
5105 | struct nfs4_client *clp, *next; | |
44e34da6 | 5106 | u64 count = 0; |
3320fef1 | 5107 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5108 | |
44e34da6 BS |
5109 | if (!nfsd_netns_ready(nn)) |
5110 | return 0; | |
5111 | ||
5ed58bb2 | 5112 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5113 | count += func(clp, max - count); |
5114 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5115 | break; |
5116 | } | |
65178db4 | 5117 | |
44e34da6 BS |
5118 | return count; |
5119 | } | |
5120 | ||
6c1e82a4 BS |
5121 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5122 | { | |
5123 | struct nfs4_client *clp; | |
5124 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5125 | ||
5126 | if (!nfsd_netns_ready(nn)) | |
5127 | return NULL; | |
5128 | ||
5129 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5130 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5131 | return clp; | |
5132 | } | |
5133 | return NULL; | |
5134 | } | |
5135 | ||
65178db4 BS |
5136 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5137 | ||
c2f1a551 MS |
5138 | /* |
5139 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5140 | * client may quite reasonably hang on to a delegation as long as it has | |
5141 | * the inode cached. This becomes an obvious problem the first time a | |
5142 | * client's inode cache approaches the size of the server's total memory. | |
5143 | * | |
5144 | * For now we avoid this problem by imposing a hard limit on the number | |
5145 | * of delegations, which varies according to the server's memory size. | |
5146 | */ | |
5147 | static void | |
5148 | set_max_delegations(void) | |
5149 | { | |
5150 | /* | |
5151 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5152 | * estimates suggest that in the worst case (where every delegation | |
5153 | * is for a different inode), a delegation could take about 1.5K, | |
5154 | * giving a worst case usage of about 6% of memory. | |
5155 | */ | |
5156 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5157 | } | |
5158 | ||
d85ed443 | 5159 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5160 | { |
5161 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5162 | int i; | |
5163 | ||
5164 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5165 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5166 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5167 | goto err; |
0a7ec377 SK |
5168 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5169 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5170 | if (!nn->unconf_id_hashtbl) | |
5171 | goto err_unconf_id; | |
9b531137 SK |
5172 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
5173 | OWNER_HASH_SIZE, GFP_KERNEL); | |
5174 | if (!nn->ownerstr_hashtbl) | |
5175 | goto err_ownerstr; | |
1872de0e SK |
5176 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5177 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5178 | if (!nn->sessionid_hashtbl) | |
5179 | goto err_sessionid; | |
8daae4dc | 5180 | |
382a62e7 | 5181 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5182 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5183 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5184 | } |
9b531137 SK |
5185 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
5186 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
1872de0e SK |
5187 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5188 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5189 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5190 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5191 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5192 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5193 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5194 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5195 | |
09121281 | 5196 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5197 | get_net(net); |
09121281 | 5198 | |
8daae4dc | 5199 | return 0; |
382a62e7 | 5200 | |
1872de0e | 5201 | err_sessionid: |
20e9e2bc | 5202 | kfree(nn->ownerstr_hashtbl); |
9b531137 SK |
5203 | err_ownerstr: |
5204 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5205 | err_unconf_id: |
5206 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5207 | err: |
5208 | return -ENOMEM; | |
8daae4dc SK |
5209 | } |
5210 | ||
5211 | static void | |
4dce0ac9 | 5212 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5213 | { |
5214 | int i; | |
5215 | struct nfs4_client *clp = NULL; | |
5216 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5217 | ||
5218 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5219 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5220 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5221 | destroy_client(clp); | |
5222 | } | |
5223 | } | |
a99454aa | 5224 | |
2b905635 KM |
5225 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5226 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5227 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5228 | destroy_client(clp); | |
5229 | } | |
a99454aa SK |
5230 | } |
5231 | ||
1872de0e | 5232 | kfree(nn->sessionid_hashtbl); |
9b531137 | 5233 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5234 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5235 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5236 | put_net(net); |
8daae4dc SK |
5237 | } |
5238 | ||
f252bc68 | 5239 | int |
d85ed443 | 5240 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5241 | { |
5e1533c7 | 5242 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5243 | int ret; |
5244 | ||
d85ed443 | 5245 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5246 | if (ret) |
5247 | return ret; | |
5e1533c7 | 5248 | nfsd4_client_tracking_init(net); |
2c142baa | 5249 | nn->boot_time = get_seconds(); |
5ccb0066 | 5250 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5251 | nn->grace_ended = false; |
d85ed443 | 5252 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5253 | nn->nfsd4_grace, net); |
5254 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5255 | return 0; |
5256 | } | |
5257 | ||
5258 | /* initialization to perform when the nfsd service is started: */ | |
5259 | ||
5260 | int | |
5261 | nfs4_state_start(void) | |
5262 | { | |
5263 | int ret; | |
5264 | ||
b5a1a81e | 5265 | ret = set_callback_cred(); |
d85ed443 SK |
5266 | if (ret) |
5267 | return -ENOMEM; | |
58da282b | 5268 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5269 | if (laundry_wq == NULL) { |
5270 | ret = -ENOMEM; | |
5271 | goto out_recovery; | |
5272 | } | |
b5a1a81e BF |
5273 | ret = nfsd4_create_callback_queue(); |
5274 | if (ret) | |
5275 | goto out_free_laundry; | |
09121281 | 5276 | |
c2f1a551 | 5277 | set_max_delegations(); |
d85ed443 | 5278 | |
b5a1a81e | 5279 | return 0; |
d85ed443 | 5280 | |
b5a1a81e BF |
5281 | out_free_laundry: |
5282 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5283 | out_recovery: |
b5a1a81e | 5284 | return ret; |
1da177e4 LT |
5285 | } |
5286 | ||
f252bc68 | 5287 | void |
4dce0ac9 | 5288 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5289 | { |
1da177e4 | 5290 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5291 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5292 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5293 | |
4dce0ac9 SK |
5294 | cancel_delayed_work_sync(&nn->laundromat_work); |
5295 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5296 | |
e50a26dc | 5297 | nfs4_lock_state(); |
1da177e4 | 5298 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5299 | spin_lock(&state_lock); |
e8c69d17 | 5300 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
5301 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
5302 | list_move(&dp->dl_recall_lru, &reaplist); | |
5303 | } | |
cdc97505 | 5304 | spin_unlock(&state_lock); |
1da177e4 LT |
5305 | list_for_each_safe(pos, next, &reaplist) { |
5306 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 5307 | destroy_delegation(dp); |
1da177e4 LT |
5308 | } |
5309 | ||
3320fef1 | 5310 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5311 | nfs4_state_destroy_net(net); |
e50a26dc | 5312 | nfs4_unlock_state(); |
1da177e4 LT |
5313 | } |
5314 | ||
5315 | void | |
5316 | nfs4_state_shutdown(void) | |
5317 | { | |
5e8d5c29 | 5318 | destroy_workqueue(laundry_wq); |
c3935e30 | 5319 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5320 | } |
8b70484c TM |
5321 | |
5322 | static void | |
5323 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5324 | { | |
37c593c5 TM |
5325 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5326 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5327 | } |
5328 | ||
5329 | static void | |
5330 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5331 | { | |
37c593c5 TM |
5332 | if (cstate->minorversion) { |
5333 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5334 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5335 | } | |
5336 | } | |
5337 | ||
5338 | void | |
5339 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5340 | { | |
5341 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5342 | } |
5343 | ||
62cd4a59 TM |
5344 | /* |
5345 | * functions to set current state id | |
5346 | */ | |
9428fe1a TM |
5347 | void |
5348 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5349 | { | |
5350 | put_stateid(cstate, &odp->od_stateid); | |
5351 | } | |
5352 | ||
8b70484c TM |
5353 | void |
5354 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5355 | { | |
5356 | put_stateid(cstate, &open->op_stateid); | |
5357 | } | |
5358 | ||
62cd4a59 TM |
5359 | void |
5360 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5361 | { | |
5362 | put_stateid(cstate, &close->cl_stateid); | |
5363 | } | |
5364 | ||
5365 | void | |
5366 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5367 | { | |
5368 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5369 | } | |
5370 | ||
5371 | /* | |
5372 | * functions to consume current state id | |
5373 | */ | |
1e97b519 | 5374 | |
9428fe1a TM |
5375 | void |
5376 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5377 | { | |
5378 | get_stateid(cstate, &odp->od_stateid); | |
5379 | } | |
5380 | ||
5381 | void | |
5382 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5383 | { | |
5384 | get_stateid(cstate, &drp->dr_stateid); | |
5385 | } | |
5386 | ||
1e97b519 TM |
5387 | void |
5388 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5389 | { | |
5390 | get_stateid(cstate, &fsp->fr_stateid); | |
5391 | } | |
5392 | ||
5393 | void | |
5394 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5395 | { | |
5396 | get_stateid(cstate, &setattr->sa_stateid); | |
5397 | } | |
5398 | ||
8b70484c TM |
5399 | void |
5400 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5401 | { | |
5402 | get_stateid(cstate, &close->cl_stateid); | |
5403 | } | |
5404 | ||
5405 | void | |
62cd4a59 | 5406 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5407 | { |
62cd4a59 | 5408 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5409 | } |
30813e27 TM |
5410 | |
5411 | void | |
5412 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5413 | { | |
5414 | get_stateid(cstate, &read->rd_stateid); | |
5415 | } | |
5416 | ||
5417 | void | |
5418 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5419 | { | |
5420 | get_stateid(cstate, &write->wr_stateid); | |
5421 | } |