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 | ||
4b24ca7d JL |
192 | static void put_client_renew(struct nfs4_client *clp) |
193 | { | |
194 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
195 | ||
196 | spin_lock(&nn->client_lock); | |
197 | put_client_renew_locked(clp); | |
198 | spin_unlock(&nn->client_lock); | |
199 | } | |
200 | ||
d4e19e70 TM |
201 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
202 | { | |
203 | __be32 status; | |
204 | ||
205 | if (is_session_dead(ses)) | |
206 | return nfserr_badsession; | |
207 | status = get_client_locked(ses->se_client); | |
208 | if (status) | |
209 | return status; | |
210 | atomic_inc(&ses->se_ref); | |
211 | return nfs_ok; | |
212 | } | |
213 | ||
214 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
215 | { | |
216 | struct nfs4_client *clp = ses->se_client; | |
217 | ||
218 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
219 | free_session(ses); | |
220 | put_client_renew_locked(clp); | |
221 | } | |
222 | ||
223 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
224 | { | |
225 | struct nfs4_client *clp = ses->se_client; | |
226 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
227 | ||
228 | spin_lock(&nn->client_lock); | |
229 | nfsd4_put_session_locked(ses); | |
230 | spin_unlock(&nn->client_lock); | |
231 | } | |
232 | ||
233 | ||
1da177e4 LT |
234 | static inline u32 |
235 | opaque_hashval(const void *ptr, int nbytes) | |
236 | { | |
237 | unsigned char *cptr = (unsigned char *) ptr; | |
238 | ||
239 | u32 x = 0; | |
240 | while (nbytes--) { | |
241 | x *= 37; | |
242 | x += *cptr++; | |
243 | } | |
244 | return x; | |
245 | } | |
246 | ||
32513b40 BF |
247 | static void nfsd4_free_file(struct nfs4_file *f) |
248 | { | |
249 | kmem_cache_free(file_slab, f); | |
250 | } | |
251 | ||
13cd2184 N |
252 | static inline void |
253 | put_nfs4_file(struct nfs4_file *fi) | |
254 | { | |
cdc97505 | 255 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 256 | hlist_del(&fi->fi_hash); |
cdc97505 | 257 | spin_unlock(&state_lock); |
8b671b80 | 258 | iput(fi->fi_inode); |
32513b40 | 259 | nfsd4_free_file(fi); |
8b671b80 | 260 | } |
13cd2184 N |
261 | } |
262 | ||
263 | static inline void | |
264 | get_nfs4_file(struct nfs4_file *fi) | |
265 | { | |
8b671b80 | 266 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
267 | } |
268 | ||
ef0f3390 | 269 | static int num_delegations; |
697ce9be | 270 | unsigned long max_delegations; |
ef0f3390 N |
271 | |
272 | /* | |
273 | * Open owner state (share locks) | |
274 | */ | |
275 | ||
16bfdaaf BF |
276 | /* hash tables for lock and open owners */ |
277 | #define OWNER_HASH_BITS 8 | |
278 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
279 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 280 | |
16bfdaaf | 281 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
282 | { |
283 | unsigned int ret; | |
284 | ||
285 | ret = opaque_hashval(ownername->data, ownername->len); | |
286 | ret += clientid; | |
16bfdaaf | 287 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 288 | } |
ef0f3390 | 289 | |
ef0f3390 N |
290 | /* hash table for nfs4_file */ |
291 | #define FILE_HASH_BITS 8 | |
292 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 293 | |
ddc04c41 BF |
294 | static unsigned int file_hashval(struct inode *ino) |
295 | { | |
296 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
297 | return hash_ptr(ino, FILE_HASH_BITS); | |
298 | } | |
299 | ||
89876f8c | 300 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 301 | |
3477565e BF |
302 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
303 | { | |
304 | WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
305 | atomic_inc(&fp->fi_access[oflag]); | |
306 | } | |
307 | ||
998db52c BF |
308 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
309 | { | |
310 | if (oflag == O_RDWR) { | |
3477565e BF |
311 | __nfs4_file_get_access(fp, O_RDONLY); |
312 | __nfs4_file_get_access(fp, O_WRONLY); | |
998db52c | 313 | } else |
3477565e | 314 | __nfs4_file_get_access(fp, oflag); |
998db52c BF |
315 | } |
316 | ||
317 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
318 | { |
319 | if (fp->fi_fds[oflag]) { | |
320 | fput(fp->fi_fds[oflag]); | |
321 | fp->fi_fds[oflag] = NULL; | |
322 | } | |
323 | } | |
324 | ||
998db52c | 325 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
326 | { |
327 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 328 | nfs4_file_put_fd(fp, oflag); |
0c7c3e67 | 329 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
3d02fa29 | 330 | nfs4_file_put_fd(fp, O_RDWR); |
f9d7562f BF |
331 | } |
332 | } | |
333 | ||
998db52c BF |
334 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
335 | { | |
336 | if (oflag == O_RDWR) { | |
337 | __nfs4_file_put_access(fp, O_RDONLY); | |
338 | __nfs4_file_put_access(fp, O_WRONLY); | |
339 | } else | |
340 | __nfs4_file_put_access(fp, oflag); | |
341 | } | |
342 | ||
3abdb607 BF |
343 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
344 | kmem_cache *slab) | |
2a74aba7 | 345 | { |
3abdb607 | 346 | struct idr *stateids = &cl->cl_stateids; |
3abdb607 | 347 | struct nfs4_stid *stid; |
6136d2b4 | 348 | int new_id; |
2a74aba7 | 349 | |
3abdb607 BF |
350 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
351 | if (!stid) | |
352 | return NULL; | |
353 | ||
398c33aa | 354 | new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL); |
ebd6c707 | 355 | if (new_id < 0) |
3abdb607 | 356 | goto out_free; |
2a74aba7 | 357 | stid->sc_client = cl; |
3abdb607 BF |
358 | stid->sc_type = 0; |
359 | stid->sc_stateid.si_opaque.so_id = new_id; | |
360 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 361 | /* Will be incremented before return to client: */ |
3abdb607 | 362 | stid->sc_stateid.si_generation = 0; |
996e0938 | 363 | |
996e0938 | 364 | /* |
3abdb607 BF |
365 | * It shouldn't be a problem to reuse an opaque stateid value. |
366 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
367 | * example, a stray write retransmission could be accepted by | |
368 | * the server when it should have been rejected. Therefore, | |
369 | * adopt a trick from the sctp code to attempt to maximize the | |
370 | * amount of time until an id is reused, by ensuring they always | |
371 | * "increase" (mod INT_MAX): | |
996e0938 | 372 | */ |
3abdb607 BF |
373 | return stid; |
374 | out_free: | |
2c44a234 | 375 | kmem_cache_free(slab, stid); |
3abdb607 | 376 | return NULL; |
2a74aba7 BF |
377 | } |
378 | ||
4cdc951b BF |
379 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
380 | { | |
381 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
382 | } | |
383 | ||
6282cd56 N |
384 | /* |
385 | * When we recall a delegation, we should be careful not to hand it | |
386 | * out again straight away. | |
387 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
388 | * in which the filehandles of recalled delegations are "stored". | |
389 | * If a filehandle appear in either filter, a delegation is blocked. | |
390 | * When a delegation is recalled, the filehandle is stored in the "new" | |
391 | * filter. | |
392 | * Every 30 seconds we swap the filters and clear the "new" one, | |
393 | * unless both are empty of course. | |
394 | * | |
395 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
396 | * low 3 bytes as hash-table indices. | |
397 | * | |
398 | * 'state_lock', which is always held when block_delegations() is called, | |
399 | * is used to manage concurrent access. Testing does not need the lock | |
400 | * except when swapping the two filters. | |
401 | */ | |
402 | static struct bloom_pair { | |
403 | int entries, old_entries; | |
404 | time_t swap_time; | |
405 | int new; /* index into 'set' */ | |
406 | DECLARE_BITMAP(set[2], 256); | |
407 | } blocked_delegations; | |
408 | ||
409 | static int delegation_blocked(struct knfsd_fh *fh) | |
410 | { | |
411 | u32 hash; | |
412 | struct bloom_pair *bd = &blocked_delegations; | |
413 | ||
414 | if (bd->entries == 0) | |
415 | return 0; | |
416 | if (seconds_since_boot() - bd->swap_time > 30) { | |
417 | spin_lock(&state_lock); | |
418 | if (seconds_since_boot() - bd->swap_time > 30) { | |
419 | bd->entries -= bd->old_entries; | |
420 | bd->old_entries = bd->entries; | |
421 | memset(bd->set[bd->new], 0, | |
422 | sizeof(bd->set[0])); | |
423 | bd->new = 1-bd->new; | |
424 | bd->swap_time = seconds_since_boot(); | |
425 | } | |
426 | spin_unlock(&state_lock); | |
427 | } | |
428 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
429 | if (test_bit(hash&255, bd->set[0]) && | |
430 | test_bit((hash>>8)&255, bd->set[0]) && | |
431 | test_bit((hash>>16)&255, bd->set[0])) | |
432 | return 1; | |
433 | ||
434 | if (test_bit(hash&255, bd->set[1]) && | |
435 | test_bit((hash>>8)&255, bd->set[1]) && | |
436 | test_bit((hash>>16)&255, bd->set[1])) | |
437 | return 1; | |
438 | ||
439 | return 0; | |
440 | } | |
441 | ||
442 | static void block_delegations(struct knfsd_fh *fh) | |
443 | { | |
444 | u32 hash; | |
445 | struct bloom_pair *bd = &blocked_delegations; | |
446 | ||
447 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
448 | ||
449 | __set_bit(hash&255, bd->set[bd->new]); | |
450 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
451 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
452 | if (bd->entries == 0) | |
453 | bd->swap_time = seconds_since_boot(); | |
454 | bd->entries += 1; | |
455 | } | |
456 | ||
1da177e4 | 457 | static struct nfs4_delegation * |
99c41515 | 458 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh) |
1da177e4 LT |
459 | { |
460 | struct nfs4_delegation *dp; | |
1da177e4 LT |
461 | |
462 | dprintk("NFSD alloc_init_deleg\n"); | |
c2f1a551 | 463 | if (num_delegations > max_delegations) |
ef0f3390 | 464 | return NULL; |
6282cd56 N |
465 | if (delegation_blocked(¤t_fh->fh_handle)) |
466 | return NULL; | |
996e0938 | 467 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 468 | if (dp == NULL) |
1da177e4 | 469 | return dp; |
2a74aba7 BF |
470 | /* |
471 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
472 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
473 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
474 | */ |
475 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 476 | num_delegations++; |
ea1da636 N |
477 | INIT_LIST_HEAD(&dp->dl_perfile); |
478 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 479 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
bf7bd3e9 | 480 | dp->dl_file = NULL; |
99c41515 | 481 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
6c02eaa1 | 482 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
483 | dp->dl_time = 0; |
484 | atomic_set(&dp->dl_count, 1); | |
57725155 | 485 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
486 | return dp; |
487 | } | |
488 | ||
68a33961 | 489 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
490 | { |
491 | struct idr *stateids = &s->sc_client->cl_stateids; | |
492 | ||
493 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
494 | } |
495 | ||
9857df81 BH |
496 | static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s) |
497 | { | |
498 | kmem_cache_free(slab, s); | |
499 | } | |
500 | ||
1da177e4 LT |
501 | void |
502 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
503 | { | |
504 | if (atomic_dec_and_test(&dp->dl_count)) { | |
9857df81 | 505 | nfs4_free_stid(deleg_slab, &dp->dl_stid); |
ef0f3390 | 506 | num_delegations--; |
1da177e4 LT |
507 | } |
508 | } | |
509 | ||
acfdf5c3 | 510 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 511 | { |
cbf7a75b BF |
512 | if (!fp->fi_lease) |
513 | return; | |
acfdf5c3 BF |
514 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
515 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
516 | fp->fi_lease = NULL; | |
4ee63624 | 517 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
518 | fp->fi_deleg_file = NULL; |
519 | } | |
1da177e4 LT |
520 | } |
521 | ||
6136d2b4 BF |
522 | static void unhash_stid(struct nfs4_stid *s) |
523 | { | |
3abdb607 | 524 | s->sc_type = 0; |
6136d2b4 BF |
525 | } |
526 | ||
931ee56c BH |
527 | static void |
528 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
529 | { | |
cdc97505 | 530 | lockdep_assert_held(&state_lock); |
931ee56c | 531 | |
3fb87d13 | 532 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
533 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
534 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
535 | } | |
536 | ||
1da177e4 LT |
537 | /* Called under the state lock. */ |
538 | static void | |
539 | unhash_delegation(struct nfs4_delegation *dp) | |
540 | { | |
cdc97505 | 541 | spin_lock(&state_lock); |
931ee56c | 542 | list_del_init(&dp->dl_perclnt); |
5d926e8c | 543 | list_del_init(&dp->dl_perfile); |
1da177e4 | 544 | list_del_init(&dp->dl_recall_lru); |
cdc97505 | 545 | spin_unlock(&state_lock); |
cbf7a75b BF |
546 | if (dp->dl_file) { |
547 | nfs4_put_deleg_lease(dp->dl_file); | |
548 | put_nfs4_file(dp->dl_file); | |
549 | dp->dl_file = NULL; | |
550 | } | |
3bd64a5b BF |
551 | } |
552 | ||
553 | ||
554 | ||
555 | static void destroy_revoked_delegation(struct nfs4_delegation *dp) | |
556 | { | |
557 | list_del_init(&dp->dl_recall_lru); | |
68a33961 | 558 | remove_stid(&dp->dl_stid); |
1da177e4 LT |
559 | nfs4_put_delegation(dp); |
560 | } | |
561 | ||
3bd64a5b BF |
562 | static void destroy_delegation(struct nfs4_delegation *dp) |
563 | { | |
564 | unhash_delegation(dp); | |
565 | remove_stid(&dp->dl_stid); | |
566 | nfs4_put_delegation(dp); | |
567 | } | |
568 | ||
569 | static void revoke_delegation(struct nfs4_delegation *dp) | |
570 | { | |
571 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
572 | ||
573 | if (clp->cl_minorversion == 0) | |
574 | destroy_delegation(dp); | |
575 | else { | |
576 | unhash_delegation(dp); | |
577 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; | |
578 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
579 | } | |
580 | } | |
581 | ||
1da177e4 LT |
582 | /* |
583 | * SETCLIENTID state | |
584 | */ | |
585 | ||
ddc04c41 BF |
586 | static unsigned int clientid_hashval(u32 id) |
587 | { | |
588 | return id & CLIENT_HASH_MASK; | |
589 | } | |
590 | ||
591 | static unsigned int clientstr_hashval(const char *name) | |
592 | { | |
593 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
594 | } | |
595 | ||
f9d7562f BF |
596 | /* |
597 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
598 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
599 | * only what share bits are currently in force, but also what | |
600 | * combinations of share bits previous opens have used. This allows us | |
601 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
602 | * return an error if the client attempt to downgrade to a combination | |
603 | * of share bits not explicable by closing some of its previous opens. | |
604 | * | |
605 | * XXX: This enforcement is actually incomplete, since we don't keep | |
606 | * track of access/deny bit combinations; so, e.g., we allow: | |
607 | * | |
608 | * OPEN allow read, deny write | |
609 | * OPEN allow both, deny none | |
610 | * DOWNGRADE allow read, deny none | |
611 | * | |
612 | * which we should reject. | |
613 | */ | |
5ae037e5 JL |
614 | static unsigned int |
615 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 616 | int i; |
5ae037e5 | 617 | unsigned int access = 0; |
f9d7562f | 618 | |
f9d7562f BF |
619 | for (i = 1; i < 4; i++) { |
620 | if (test_bit(i, &bmap)) | |
5ae037e5 | 621 | access |= i; |
f9d7562f | 622 | } |
5ae037e5 | 623 | return access; |
f9d7562f BF |
624 | } |
625 | ||
3a328614 | 626 | static bool |
dcef0413 | 627 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
628 | unsigned int access, deny; |
629 | ||
5ae037e5 JL |
630 | access = bmap_to_share_mode(stp->st_access_bmap); |
631 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 632 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
633 | return false; |
634 | return true; | |
f9d7562f BF |
635 | } |
636 | ||
82c5ff1b JL |
637 | /* set share access for a given stateid */ |
638 | static inline void | |
639 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
640 | { | |
641 | __set_bit(access, &stp->st_access_bmap); | |
642 | } | |
643 | ||
644 | /* clear share access for a given stateid */ | |
645 | static inline void | |
646 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
647 | { | |
648 | __clear_bit(access, &stp->st_access_bmap); | |
649 | } | |
650 | ||
651 | /* test whether a given stateid has access */ | |
652 | static inline bool | |
653 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
654 | { | |
655 | return test_bit(access, &stp->st_access_bmap); | |
656 | } | |
657 | ||
ce0fc43c JL |
658 | /* set share deny for a given stateid */ |
659 | static inline void | |
660 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
661 | { | |
662 | __set_bit(access, &stp->st_deny_bmap); | |
663 | } | |
664 | ||
665 | /* clear share deny for a given stateid */ | |
666 | static inline void | |
667 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
668 | { | |
669 | __clear_bit(access, &stp->st_deny_bmap); | |
670 | } | |
671 | ||
672 | /* test whether a given stateid is denying specific access */ | |
673 | static inline bool | |
674 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
675 | { | |
676 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
677 | } |
678 | ||
679 | static int nfs4_access_to_omode(u32 access) | |
680 | { | |
8f34a430 | 681 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
682 | case NFS4_SHARE_ACCESS_READ: |
683 | return O_RDONLY; | |
684 | case NFS4_SHARE_ACCESS_WRITE: | |
685 | return O_WRONLY; | |
686 | case NFS4_SHARE_ACCESS_BOTH: | |
687 | return O_RDWR; | |
688 | } | |
063b0fb9 BF |
689 | WARN_ON_ONCE(1); |
690 | return O_RDONLY; | |
f9d7562f BF |
691 | } |
692 | ||
82c5ff1b JL |
693 | /* release all access and file references for a given stateid */ |
694 | static void | |
695 | release_all_access(struct nfs4_ol_stateid *stp) | |
696 | { | |
697 | int i; | |
698 | ||
699 | for (i = 1; i < 4; i++) { | |
700 | if (test_access(i, stp)) | |
701 | nfs4_file_put_access(stp->st_file, | |
702 | nfs4_access_to_omode(i)); | |
703 | clear_access(i, stp); | |
704 | } | |
705 | } | |
706 | ||
dcef0413 | 707 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 708 | { |
529d7b2a BF |
709 | list_del(&stp->st_perfile); |
710 | list_del(&stp->st_perstateowner); | |
711 | } | |
712 | ||
dcef0413 | 713 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 714 | { |
82c5ff1b | 715 | release_all_access(stp); |
a96e5b90 | 716 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
717 | stp->st_file = NULL; |
718 | } | |
719 | ||
dcef0413 | 720 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 721 | { |
68a33961 | 722 | remove_stid(&stp->st_stid); |
9857df81 | 723 | nfs4_free_stid(stateid_slab, &stp->st_stid); |
529d7b2a BF |
724 | } |
725 | ||
3c87b9b7 | 726 | static void __release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
727 | { |
728 | struct file *file; | |
729 | ||
3c87b9b7 | 730 | list_del(&stp->st_locks); |
529d7b2a | 731 | unhash_generic_stateid(stp); |
6136d2b4 | 732 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
733 | file = find_any_file(stp->st_file); |
734 | if (file) | |
fe0750e5 | 735 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 736 | close_generic_stateid(stp); |
529d7b2a BF |
737 | free_generic_stateid(stp); |
738 | } | |
739 | ||
fe0750e5 | 740 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 741 | { |
dcef0413 | 742 | struct nfs4_ol_stateid *stp; |
529d7b2a | 743 | |
fe0750e5 | 744 | list_del(&lo->lo_owner.so_strhash); |
fe0750e5 BF |
745 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
746 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 747 | struct nfs4_ol_stateid, st_perstateowner); |
3c87b9b7 | 748 | __release_lock_stateid(stp); |
529d7b2a BF |
749 | } |
750 | } | |
751 | ||
50cc6231 TM |
752 | static void nfs4_free_lockowner(struct nfs4_lockowner *lo) |
753 | { | |
754 | kfree(lo->lo_owner.so_owner.data); | |
755 | kmem_cache_free(lockowner_slab, lo); | |
756 | } | |
757 | ||
fe0750e5 | 758 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 759 | { |
fe0750e5 BF |
760 | unhash_lockowner(lo); |
761 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
762 | } |
763 | ||
3c87b9b7 TM |
764 | static void release_lockowner_if_empty(struct nfs4_lockowner *lo) |
765 | { | |
766 | if (list_empty(&lo->lo_owner.so_stateids)) | |
767 | release_lockowner(lo); | |
768 | } | |
769 | ||
770 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
529d7b2a | 771 | { |
fe0750e5 | 772 | struct nfs4_lockowner *lo; |
529d7b2a | 773 | |
3c87b9b7 TM |
774 | lo = lockowner(stp->st_stateowner); |
775 | __release_lock_stateid(stp); | |
776 | release_lockowner_if_empty(lo); | |
777 | } | |
778 | ||
779 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) | |
780 | { | |
781 | struct nfs4_ol_stateid *stp; | |
782 | ||
783 | while (!list_empty(&open_stp->st_locks)) { | |
784 | stp = list_entry(open_stp->st_locks.next, | |
785 | struct nfs4_ol_stateid, st_locks); | |
786 | release_lock_stateid(stp); | |
529d7b2a BF |
787 | } |
788 | } | |
789 | ||
38c387b5 | 790 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
791 | { |
792 | unhash_generic_stateid(stp); | |
3c87b9b7 | 793 | release_open_stateid_locks(stp); |
38c387b5 BF |
794 | close_generic_stateid(stp); |
795 | } | |
796 | ||
797 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
798 | { | |
799 | unhash_open_stateid(stp); | |
2283963f BF |
800 | free_generic_stateid(stp); |
801 | } | |
802 | ||
fe0750e5 | 803 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 804 | { |
dcef0413 | 805 | struct nfs4_ol_stateid *stp; |
f1d110ca | 806 | |
fe0750e5 BF |
807 | list_del(&oo->oo_owner.so_strhash); |
808 | list_del(&oo->oo_perclient); | |
809 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
810 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 811 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 812 | release_open_stateid(stp); |
f1d110ca BF |
813 | } |
814 | } | |
815 | ||
f7a4d872 BF |
816 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
817 | { | |
818 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
819 | ||
820 | if (s) { | |
f7a4d872 BF |
821 | free_generic_stateid(s); |
822 | oo->oo_last_closed_stid = NULL; | |
823 | } | |
824 | } | |
825 | ||
50cc6231 TM |
826 | static void nfs4_free_openowner(struct nfs4_openowner *oo) |
827 | { | |
828 | kfree(oo->oo_owner.so_owner.data); | |
829 | kmem_cache_free(openowner_slab, oo); | |
830 | } | |
831 | ||
fe0750e5 | 832 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 833 | { |
fe0750e5 BF |
834 | unhash_openowner(oo); |
835 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 836 | release_last_closed_stateid(oo); |
fe0750e5 | 837 | nfs4_free_openowner(oo); |
f1d110ca BF |
838 | } |
839 | ||
5282fd72 ME |
840 | static inline int |
841 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
842 | { | |
843 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
844 | ||
845 | return sid->sequence % SESSION_HASH_SIZE; | |
846 | } | |
847 | ||
8f199b82 | 848 | #ifdef NFSD_DEBUG |
5282fd72 ME |
849 | static inline void |
850 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
851 | { | |
852 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
853 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
854 | } | |
8f199b82 TM |
855 | #else |
856 | static inline void | |
857 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
858 | { | |
859 | } | |
860 | #endif | |
861 | ||
9411b1d4 BF |
862 | /* |
863 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
864 | * won't be used for replay. | |
865 | */ | |
866 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
867 | { | |
868 | struct nfs4_stateowner *so = cstate->replay_owner; | |
869 | ||
870 | if (nfserr == nfserr_replay_me) | |
871 | return; | |
872 | ||
873 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
874 | cstate->replay_owner = NULL; | |
875 | return; | |
876 | } | |
877 | if (!so) | |
878 | return; | |
879 | if (so->so_is_open_owner) | |
880 | release_last_closed_stateid(openowner(so)); | |
881 | so->so_seqid++; | |
882 | return; | |
883 | } | |
5282fd72 | 884 | |
ec6b5d7b AA |
885 | static void |
886 | gen_sessionid(struct nfsd4_session *ses) | |
887 | { | |
888 | struct nfs4_client *clp = ses->se_client; | |
889 | struct nfsd4_sessionid *sid; | |
890 | ||
891 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
892 | sid->clientid = clp->cl_clientid; | |
893 | sid->sequence = current_sessionid++; | |
894 | sid->reserved = 0; | |
895 | } | |
896 | ||
897 | /* | |
a649637c AA |
898 | * The protocol defines ca_maxresponssize_cached to include the size of |
899 | * the rpc header, but all we need to cache is the data starting after | |
900 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
901 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
902 | * value that is the number of bytes in our cache plus a few additional | |
903 | * bytes. In order to stay on the safe side, and not promise more than | |
904 | * we can cache, those additional bytes must be the minimum possible: 24 | |
905 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
906 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
907 | * for the SEQUENCE op response: | |
908 | */ | |
909 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
910 | ||
557ce264 AA |
911 | static void |
912 | free_session_slots(struct nfsd4_session *ses) | |
913 | { | |
914 | int i; | |
915 | ||
916 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
917 | kfree(ses->se_slots[i]); | |
918 | } | |
919 | ||
a649637c | 920 | /* |
efe0cb6d BF |
921 | * We don't actually need to cache the rpc and session headers, so we |
922 | * can allocate a little less for each slot: | |
923 | */ | |
55c760cf | 924 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 925 | { |
55c760cf | 926 | u32 size; |
efe0cb6d | 927 | |
55c760cf BF |
928 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
929 | size = 0; | |
930 | else | |
931 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
932 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 933 | } |
ec6b5d7b | 934 | |
5b6feee9 BF |
935 | /* |
936 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 937 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 938 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 939 | */ |
55c760cf | 940 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 941 | { |
55c760cf BF |
942 | u32 slotsize = slot_bytes(ca); |
943 | u32 num = ca->maxreqs; | |
5b6feee9 | 944 | int avail; |
ec6b5d7b | 945 | |
5b6feee9 | 946 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
947 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
948 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
949 | num = min_t(int, num, avail / slotsize); |
950 | nfsd_drc_mem_used += num * slotsize; | |
951 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 952 | |
5b6feee9 BF |
953 | return num; |
954 | } | |
ec6b5d7b | 955 | |
55c760cf | 956 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 957 | { |
55c760cf BF |
958 | int slotsize = slot_bytes(ca); |
959 | ||
4bd9b0f4 | 960 | spin_lock(&nfsd_drc_lock); |
55c760cf | 961 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 962 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 963 | } |
ec6b5d7b | 964 | |
60810e54 KM |
965 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
966 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 967 | { |
60810e54 KM |
968 | int numslots = fattrs->maxreqs; |
969 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
970 | struct nfsd4_session *new; |
971 | int mem, i; | |
a649637c | 972 | |
5b6feee9 BF |
973 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
974 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
975 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 976 | |
5b6feee9 BF |
977 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
978 | if (!new) | |
979 | return NULL; | |
557ce264 | 980 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 981 | for (i = 0; i < numslots; i++) { |
55c760cf | 982 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 983 | if (!new->se_slots[i]) |
557ce264 | 984 | goto out_free; |
557ce264 | 985 | } |
60810e54 KM |
986 | |
987 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
988 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
989 | ||
5b6feee9 BF |
990 | return new; |
991 | out_free: | |
992 | while (i--) | |
993 | kfree(new->se_slots[i]); | |
994 | kfree(new); | |
995 | return NULL; | |
ec6b5d7b AA |
996 | } |
997 | ||
19cf5c02 BF |
998 | static void free_conn(struct nfsd4_conn *c) |
999 | { | |
1000 | svc_xprt_put(c->cn_xprt); | |
1001 | kfree(c); | |
1002 | } | |
ec6b5d7b | 1003 | |
19cf5c02 BF |
1004 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1005 | { | |
1006 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1007 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1008 | |
19cf5c02 BF |
1009 | spin_lock(&clp->cl_lock); |
1010 | if (!list_empty(&c->cn_persession)) { | |
1011 | list_del(&c->cn_persession); | |
1012 | free_conn(c); | |
1013 | } | |
eea49806 | 1014 | nfsd4_probe_callback(clp); |
2e4b7239 | 1015 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1016 | } |
ec6b5d7b | 1017 | |
d29c374c | 1018 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1019 | { |
c7662518 | 1020 | struct nfsd4_conn *conn; |
ec6b5d7b | 1021 | |
c7662518 BF |
1022 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1023 | if (!conn) | |
db90681d | 1024 | return NULL; |
c7662518 BF |
1025 | svc_xprt_get(rqstp->rq_xprt); |
1026 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1027 | conn->cn_flags = flags; |
db90681d BF |
1028 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1029 | return conn; | |
1030 | } | |
a649637c | 1031 | |
328ead28 BF |
1032 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1033 | { | |
1034 | conn->cn_session = ses; | |
1035 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1036 | } |
1037 | ||
db90681d | 1038 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1039 | { |
db90681d | 1040 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1041 | |
c7662518 | 1042 | spin_lock(&clp->cl_lock); |
328ead28 | 1043 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1044 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1045 | } |
1046 | ||
21b75b01 | 1047 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1048 | { |
19cf5c02 | 1049 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1050 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1051 | } |
1052 | ||
e1ff371f | 1053 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1054 | { |
21b75b01 | 1055 | int ret; |
ec6b5d7b | 1056 | |
db90681d | 1057 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1058 | ret = nfsd4_register_conn(conn); |
1059 | if (ret) | |
1060 | /* oops; xprt is already down: */ | |
1061 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 1062 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
1063 | /* callback channel may be back up */ |
1064 | nfsd4_probe_callback(ses->se_client); | |
1065 | } | |
c7662518 | 1066 | } |
ec6b5d7b | 1067 | |
e1ff371f | 1068 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1069 | { |
1070 | u32 dir = NFS4_CDFC4_FORE; | |
1071 | ||
e1ff371f | 1072 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1073 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1074 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1075 | } |
1076 | ||
1077 | /* must be called under client_lock */ | |
19cf5c02 | 1078 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1079 | { |
19cf5c02 BF |
1080 | struct nfs4_client *clp = s->se_client; |
1081 | struct nfsd4_conn *c; | |
ec6b5d7b | 1082 | |
19cf5c02 BF |
1083 | spin_lock(&clp->cl_lock); |
1084 | while (!list_empty(&s->se_conns)) { | |
1085 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1086 | list_del_init(&c->cn_persession); | |
1087 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1088 | |
19cf5c02 BF |
1089 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1090 | free_conn(c); | |
ec6b5d7b | 1091 | |
19cf5c02 BF |
1092 | spin_lock(&clp->cl_lock); |
1093 | } | |
1094 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1095 | } |
ec6b5d7b | 1096 | |
1377b69e BF |
1097 | static void __free_session(struct nfsd4_session *ses) |
1098 | { | |
1377b69e BF |
1099 | free_session_slots(ses); |
1100 | kfree(ses); | |
1101 | } | |
1102 | ||
66b2b9b2 | 1103 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1104 | { |
66b2b9b2 | 1105 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
1106 | |
1107 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 1108 | nfsd4_del_conns(ses); |
55c760cf | 1109 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1110 | __free_session(ses); |
c7662518 BF |
1111 | } |
1112 | ||
135ae827 | 1113 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1114 | { |
a827bcb2 | 1115 | int idx; |
1872de0e | 1116 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1117 | |
ec6b5d7b AA |
1118 | new->se_client = clp; |
1119 | gen_sessionid(new); | |
ec6b5d7b | 1120 | |
c7662518 BF |
1121 | INIT_LIST_HEAD(&new->se_conns); |
1122 | ||
ac7c46f2 | 1123 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1124 | new->se_flags = cses->flags; |
8b5ce5cd | 1125 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1126 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1127 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1128 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1129 | spin_lock(&nn->client_lock); |
1872de0e | 1130 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1131 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1132 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1133 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1134 | spin_unlock(&nn->client_lock); |
60810e54 | 1135 | |
dcbeaa68 | 1136 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1137 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1138 | /* |
1139 | * This is a little silly; with sessions there's no real | |
1140 | * use for the callback address. Use the peer address | |
1141 | * as a reasonable default for now, but consider fixing | |
1142 | * the rpc client not to require an address in the | |
1143 | * future: | |
1144 | */ | |
edd76786 BF |
1145 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1146 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1147 | } |
ec6b5d7b AA |
1148 | } |
1149 | ||
9089f1b4 | 1150 | /* caller must hold client_lock */ |
5282fd72 | 1151 | static struct nfsd4_session * |
d4e19e70 | 1152 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1153 | { |
1154 | struct nfsd4_session *elem; | |
1155 | int idx; | |
1872de0e | 1156 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1157 | |
1158 | dump_sessionid(__func__, sessionid); | |
1159 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1160 | /* Search in the appropriate list */ |
1872de0e | 1161 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1162 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1163 | NFS4_MAX_SESSIONID_LEN)) { | |
1164 | return elem; | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | dprintk("%s: session not found\n", __func__); | |
1169 | return NULL; | |
1170 | } | |
1171 | ||
d4e19e70 TM |
1172 | static struct nfsd4_session * |
1173 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1174 | __be32 *ret) | |
1175 | { | |
1176 | struct nfsd4_session *session; | |
1177 | __be32 status = nfserr_badsession; | |
1178 | ||
1179 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1180 | if (!session) | |
1181 | goto out; | |
1182 | status = nfsd4_get_session_locked(session); | |
1183 | if (status) | |
1184 | session = NULL; | |
1185 | out: | |
1186 | *ret = status; | |
1187 | return session; | |
1188 | } | |
1189 | ||
9089f1b4 | 1190 | /* caller must hold client_lock */ |
7116ed6b | 1191 | static void |
5282fd72 | 1192 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1193 | { |
1194 | list_del(&ses->se_hash); | |
4c649378 | 1195 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1196 | list_del(&ses->se_perclnt); |
4c649378 | 1197 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1198 | } |
1199 | ||
1da177e4 LT |
1200 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1201 | static int | |
2c142baa | 1202 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1203 | { |
2c142baa | 1204 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1205 | return 0; |
60adfc50 | 1206 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1207 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1208 | return 1; |
1209 | } | |
1210 | ||
1211 | /* | |
1212 | * XXX Should we use a slab cache ? | |
1213 | * This type of memory management is somewhat inefficient, but we use it | |
1214 | * anyway since SETCLIENTID is not a common operation. | |
1215 | */ | |
35bba9a3 | 1216 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1217 | { |
1218 | struct nfs4_client *clp; | |
1219 | ||
35bba9a3 BF |
1220 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1221 | if (clp == NULL) | |
1222 | return NULL; | |
67114fe6 | 1223 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1224 | if (clp->cl_name.data == NULL) { |
1225 | kfree(clp); | |
1226 | return NULL; | |
1da177e4 | 1227 | } |
35bba9a3 | 1228 | clp->cl_name.len = name.len; |
5694c93e TM |
1229 | INIT_LIST_HEAD(&clp->cl_sessions); |
1230 | idr_init(&clp->cl_stateids); | |
1231 | atomic_set(&clp->cl_refcount, 0); | |
1232 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1233 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1234 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1235 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1236 | INIT_LIST_HEAD(&clp->cl_lru); | |
1237 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1238 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1239 | spin_lock_init(&clp->cl_lock); | |
1240 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 LT |
1241 | return clp; |
1242 | } | |
1243 | ||
4dd86e15 | 1244 | static void |
1da177e4 LT |
1245 | free_client(struct nfs4_client *clp) |
1246 | { | |
bca0ec65 | 1247 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1248 | |
1249 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1250 | while (!list_empty(&clp->cl_sessions)) { |
1251 | struct nfsd4_session *ses; | |
1252 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1253 | se_perclnt); | |
1254 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1255 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1256 | free_session(ses); | |
792c95dd | 1257 | } |
4cb57e30 | 1258 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1259 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1260 | kfree(clp->cl_name.data); |
2d32b29a | 1261 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1262 | kfree(clp); |
1263 | } | |
1264 | ||
84d38ac9 BH |
1265 | /* must be called under the client_lock */ |
1266 | static inline void | |
1267 | unhash_client_locked(struct nfs4_client *clp) | |
1268 | { | |
792c95dd BF |
1269 | struct nfsd4_session *ses; |
1270 | ||
84d38ac9 | 1271 | list_del(&clp->cl_lru); |
4c649378 | 1272 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1273 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1274 | list_del_init(&ses->se_hash); | |
4c649378 | 1275 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1276 | } |
1277 | ||
1da177e4 | 1278 | static void |
0d22f68f | 1279 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1280 | { |
fe0750e5 | 1281 | struct nfs4_openowner *oo; |
1da177e4 | 1282 | struct nfs4_delegation *dp; |
1da177e4 | 1283 | struct list_head reaplist; |
382a62e7 | 1284 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1285 | |
1da177e4 | 1286 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1287 | spin_lock(&state_lock); |
ea1da636 N |
1288 | while (!list_empty(&clp->cl_delegations)) { |
1289 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1290 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1291 | list_move(&dp->dl_recall_lru, &reaplist); |
1292 | } | |
cdc97505 | 1293 | spin_unlock(&state_lock); |
1da177e4 LT |
1294 | while (!list_empty(&reaplist)) { |
1295 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 1296 | destroy_delegation(dp); |
1da177e4 | 1297 | } |
956c4fee BH |
1298 | list_splice_init(&clp->cl_revoked, &reaplist); |
1299 | while (!list_empty(&reaplist)) { | |
1300 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1301 | destroy_revoked_delegation(dp); | |
1302 | } | |
ea1da636 | 1303 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1304 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1305 | release_openowner(oo); | |
1da177e4 | 1306 | } |
6ff8da08 | 1307 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1308 | if (clp->cl_cb_conn.cb_xprt) |
1309 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1310 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1311 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1312 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1313 | else |
a99454aa | 1314 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1315 | spin_lock(&nn->client_lock); |
84d38ac9 | 1316 | unhash_client_locked(clp); |
221a6876 BF |
1317 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1318 | free_client(clp); | |
c9a49628 | 1319 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1320 | } |
1321 | ||
0d22f68f BF |
1322 | static void expire_client(struct nfs4_client *clp) |
1323 | { | |
1324 | nfsd4_client_record_remove(clp); | |
1325 | destroy_client(clp); | |
1326 | } | |
1327 | ||
35bba9a3 BF |
1328 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1329 | { | |
1330 | memcpy(target->cl_verifier.data, source->data, | |
1331 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1332 | } |
1333 | ||
35bba9a3 BF |
1334 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1335 | { | |
1da177e4 LT |
1336 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1337 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1338 | } | |
1339 | ||
03a4e1f6 | 1340 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1341 | { |
03a4e1f6 BF |
1342 | if (source->cr_principal) { |
1343 | target->cr_principal = | |
1344 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1345 | if (target->cr_principal == NULL) | |
1346 | return -ENOMEM; | |
1347 | } else | |
1348 | target->cr_principal = NULL; | |
d5497fc6 | 1349 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1350 | target->cr_uid = source->cr_uid; |
1351 | target->cr_gid = source->cr_gid; | |
1352 | target->cr_group_info = source->cr_group_info; | |
1353 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1354 | target->cr_gss_mech = source->cr_gss_mech; |
1355 | if (source->cr_gss_mech) | |
1356 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1357 | return 0; |
1da177e4 LT |
1358 | } |
1359 | ||
ac55fdc4 JL |
1360 | static long long |
1361 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1362 | { | |
1363 | long long res; | |
1364 | ||
1365 | res = o1->len - o2->len; | |
1366 | if (res) | |
1367 | return res; | |
1368 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1369 | } | |
1370 | ||
35bba9a3 | 1371 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1372 | { |
a55370a3 | 1373 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1374 | } |
1375 | ||
1376 | static int | |
599e0a22 BF |
1377 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1378 | { | |
1379 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1380 | } |
1381 | ||
1382 | static int | |
599e0a22 BF |
1383 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1384 | { | |
1385 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1386 | } |
1387 | ||
8fbba96e BF |
1388 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1389 | { | |
1390 | int i; | |
1391 | ||
1392 | if (g1->ngroups != g2->ngroups) | |
1393 | return false; | |
1394 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1395 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1396 | return false; |
1397 | return true; | |
1398 | } | |
1399 | ||
68eb3508 BF |
1400 | /* |
1401 | * RFC 3530 language requires clid_inuse be returned when the | |
1402 | * "principal" associated with a requests differs from that previously | |
1403 | * used. We use uid, gid's, and gss principal string as our best | |
1404 | * approximation. We also don't want to allow non-gss use of a client | |
1405 | * established using gss: in theory cr_principal should catch that | |
1406 | * change, but in practice cr_principal can be null even in the gss case | |
1407 | * since gssd doesn't always pass down a principal string. | |
1408 | */ | |
1409 | static bool is_gss_cred(struct svc_cred *cr) | |
1410 | { | |
1411 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1412 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1413 | } | |
1414 | ||
1415 | ||
5559b50a | 1416 | static bool |
599e0a22 BF |
1417 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1418 | { | |
68eb3508 | 1419 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1420 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1421 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1422 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1423 | return false; | |
1424 | if (cr1->cr_principal == cr2->cr_principal) | |
1425 | return true; | |
1426 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1427 | return false; | |
5559b50a | 1428 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1429 | } |
1430 | ||
57266a6e BF |
1431 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1432 | { | |
1433 | struct svc_cred *cr = &rqstp->rq_cred; | |
1434 | u32 service; | |
1435 | ||
c4720591 BF |
1436 | if (!cr->cr_gss_mech) |
1437 | return false; | |
57266a6e BF |
1438 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1439 | return service == RPC_GSS_SVC_INTEGRITY || | |
1440 | service == RPC_GSS_SVC_PRIVACY; | |
1441 | } | |
1442 | ||
1443 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1444 | { | |
1445 | struct svc_cred *cr = &rqstp->rq_cred; | |
1446 | ||
1447 | if (!cl->cl_mach_cred) | |
1448 | return true; | |
1449 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1450 | return false; | |
1451 | if (!svc_rqst_integrity_protected(rqstp)) | |
1452 | return false; | |
1453 | if (!cr->cr_principal) | |
1454 | return false; | |
1455 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1456 | } | |
1457 | ||
c212cecf | 1458 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1459 | { |
1460 | static u32 current_clientid = 1; | |
1461 | ||
2c142baa | 1462 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1463 | clp->cl_clientid.cl_id = current_clientid++; |
1464 | } | |
1465 | ||
deda2faa BF |
1466 | static void gen_confirm(struct nfs4_client *clp) |
1467 | { | |
ab4684d1 | 1468 | __be32 verf[2]; |
deda2faa | 1469 | static u32 i; |
1da177e4 | 1470 | |
f419992c JL |
1471 | /* |
1472 | * This is opaque to client, so no need to byte-swap. Use | |
1473 | * __force to keep sparse happy | |
1474 | */ | |
1475 | verf[0] = (__force __be32)get_seconds(); | |
1476 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1477 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1478 | } |
1479 | ||
38c2f4b1 | 1480 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1481 | { |
3abdb607 BF |
1482 | struct nfs4_stid *ret; |
1483 | ||
1484 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1485 | if (!ret || !ret->sc_type) | |
1486 | return NULL; | |
1487 | return ret; | |
4d71ab87 BF |
1488 | } |
1489 | ||
38c2f4b1 | 1490 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1491 | { |
1492 | struct nfs4_stid *s; | |
4d71ab87 | 1493 | |
38c2f4b1 | 1494 | s = find_stateid(cl, t); |
4d71ab87 BF |
1495 | if (!s) |
1496 | return NULL; | |
f459e453 | 1497 | if (typemask & s->sc_type) |
4581d140 | 1498 | return s; |
4581d140 BF |
1499 | return NULL; |
1500 | } | |
1501 | ||
2216d449 | 1502 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1503 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1504 | { | |
1505 | struct nfs4_client *clp; | |
1506 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1507 | int ret; |
c212cecf | 1508 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1509 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1510 | |
1511 | clp = alloc_client(name); | |
1512 | if (clp == NULL) | |
1513 | return NULL; | |
1514 | ||
03a4e1f6 BF |
1515 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1516 | if (ret) { | |
c9a49628 | 1517 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1518 | free_client(clp); |
c9a49628 | 1519 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1520 | return NULL; |
b09333c4 | 1521 | } |
57725155 | 1522 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1523 | clp->cl_time = get_seconds(); |
b09333c4 | 1524 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1525 | copy_verf(clp, verf); |
1526 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1527 | gen_confirm(clp); |
edd76786 | 1528 | clp->cl_cb_session = NULL; |
c212cecf | 1529 | clp->net = net; |
b09333c4 RL |
1530 | return clp; |
1531 | } | |
1532 | ||
fd39ca9a | 1533 | static void |
ac55fdc4 JL |
1534 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1535 | { | |
1536 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1537 | struct nfs4_client *clp; | |
1538 | ||
1539 | while (*new) { | |
1540 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1541 | parent = *new; | |
1542 | ||
1543 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1544 | new = &((*new)->rb_left); | |
1545 | else | |
1546 | new = &((*new)->rb_right); | |
1547 | } | |
1548 | ||
1549 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1550 | rb_insert_color(&new_clp->cl_namenode, root); | |
1551 | } | |
1552 | ||
1553 | static struct nfs4_client * | |
1554 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1555 | { | |
1556 | long long cmp; | |
1557 | struct rb_node *node = root->rb_node; | |
1558 | struct nfs4_client *clp; | |
1559 | ||
1560 | while (node) { | |
1561 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1562 | cmp = compare_blob(&clp->cl_name, name); | |
1563 | if (cmp > 0) | |
1564 | node = node->rb_left; | |
1565 | else if (cmp < 0) | |
1566 | node = node->rb_right; | |
1567 | else | |
1568 | return clp; | |
1569 | } | |
1570 | return NULL; | |
1571 | } | |
1572 | ||
1573 | static void | |
1574 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1575 | { |
1576 | unsigned int idhashval; | |
0a7ec377 | 1577 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1578 | |
ac55fdc4 | 1579 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1580 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1581 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1582 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1583 | renew_client(clp); |
1da177e4 LT |
1584 | } |
1585 | ||
fd39ca9a | 1586 | static void |
1da177e4 LT |
1587 | move_to_confirmed(struct nfs4_client *clp) |
1588 | { | |
1589 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1590 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1591 | |
1592 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1593 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1594 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1595 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1596 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1597 | renew_client(clp); |
1598 | } | |
1599 | ||
1600 | static struct nfs4_client * | |
bfa85e83 | 1601 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1602 | { |
1603 | struct nfs4_client *clp; | |
1604 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1605 | ||
bfa85e83 | 1606 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1607 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1608 | if ((bool)clp->cl_minorversion != sessions) |
1609 | return NULL; | |
a50d2ad1 | 1610 | renew_client(clp); |
1da177e4 | 1611 | return clp; |
a50d2ad1 | 1612 | } |
1da177e4 LT |
1613 | } |
1614 | return NULL; | |
1615 | } | |
1616 | ||
bfa85e83 BF |
1617 | static struct nfs4_client * |
1618 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1619 | { | |
1620 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1621 | ||
1622 | return find_client_in_id_table(tbl, clid, sessions); | |
1623 | } | |
1624 | ||
1da177e4 | 1625 | static struct nfs4_client * |
0a7ec377 | 1626 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1627 | { |
bfa85e83 | 1628 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1629 | |
bfa85e83 | 1630 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1631 | } |
1632 | ||
6e5f15c9 | 1633 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1634 | { |
6e5f15c9 | 1635 | return clp->cl_exchange_flags != 0; |
e203d506 | 1636 | } |
a1bcecd2 | 1637 | |
28ce6054 | 1638 | static struct nfs4_client * |
382a62e7 | 1639 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1640 | { |
382a62e7 | 1641 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1642 | } |
1643 | ||
1644 | static struct nfs4_client * | |
a99454aa | 1645 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1646 | { |
a99454aa | 1647 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1648 | } |
1649 | ||
fd39ca9a | 1650 | static void |
6f3d772f | 1651 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1652 | { |
07263f1e | 1653 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1654 | struct sockaddr *sa = svc_addr(rqstp); |
1655 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1656 | unsigned short expected_family; |
1657 | ||
1658 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1659 | if (se->se_callback_netid_len == 3 && | |
1660 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1661 | expected_family = AF_INET; | |
1662 | else if (se->se_callback_netid_len == 4 && | |
1663 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1664 | expected_family = AF_INET6; | |
1665 | else | |
1da177e4 LT |
1666 | goto out_err; |
1667 | ||
c212cecf | 1668 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1669 | se->se_callback_addr_len, |
07263f1e BF |
1670 | (struct sockaddr *)&conn->cb_addr, |
1671 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1672 | |
07263f1e | 1673 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1674 | goto out_err; |
aa9a4ec7 | 1675 | |
07263f1e BF |
1676 | if (conn->cb_addr.ss_family == AF_INET6) |
1677 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1678 | |
07263f1e BF |
1679 | conn->cb_prog = se->se_callback_prog; |
1680 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1681 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1682 | return; |
1683 | out_err: | |
07263f1e BF |
1684 | conn->cb_addr.ss_family = AF_UNSPEC; |
1685 | conn->cb_addrlen = 0; | |
849823c5 | 1686 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1687 | "will not receive delegations\n", |
1688 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1689 | ||
1da177e4 LT |
1690 | return; |
1691 | } | |
1692 | ||
074fe897 | 1693 | /* |
067e1ace | 1694 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 1695 | */ |
b607664e | 1696 | static void |
074fe897 | 1697 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 1698 | { |
f5236013 | 1699 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
1700 | struct nfsd4_slot *slot = resp->cstate.slot; |
1701 | unsigned int base; | |
074fe897 | 1702 | |
557ce264 | 1703 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1704 | |
557ce264 AA |
1705 | slot->sl_opcnt = resp->opcnt; |
1706 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1707 | |
bf5c43c8 | 1708 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1709 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1710 | slot->sl_datalen = 0; |
bf864a31 | 1711 | return; |
074fe897 | 1712 | } |
f5236013 BF |
1713 | base = resp->cstate.data_offset; |
1714 | slot->sl_datalen = buf->len - base; | |
1715 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
1716 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
1717 | return; | |
074fe897 AA |
1718 | } |
1719 | ||
1720 | /* | |
abfabf8c AA |
1721 | * Encode the replay sequence operation from the slot values. |
1722 | * If cachethis is FALSE encode the uncached rep error on the next | |
1723 | * operation which sets resp->p and increments resp->opcnt for | |
1724 | * nfs4svc_encode_compoundres. | |
074fe897 | 1725 | * |
074fe897 | 1726 | */ |
abfabf8c AA |
1727 | static __be32 |
1728 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1729 | struct nfsd4_compoundres *resp) | |
074fe897 | 1730 | { |
abfabf8c AA |
1731 | struct nfsd4_op *op; |
1732 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1733 | |
abfabf8c AA |
1734 | /* Encode the replayed sequence operation */ |
1735 | op = &args->ops[resp->opcnt - 1]; | |
1736 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1737 | |
abfabf8c | 1738 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1739 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1740 | op = &args->ops[resp->opcnt++]; |
1741 | op->status = nfserr_retry_uncached_rep; | |
1742 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1743 | } |
abfabf8c | 1744 | return op->status; |
074fe897 AA |
1745 | } |
1746 | ||
1747 | /* | |
557ce264 AA |
1748 | * The sequence operation is not cached because we can use the slot and |
1749 | * session values. | |
074fe897 | 1750 | */ |
3ca2eb98 | 1751 | static __be32 |
bf864a31 AA |
1752 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1753 | struct nfsd4_sequence *seq) | |
074fe897 | 1754 | { |
557ce264 | 1755 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
1756 | struct xdr_stream *xdr = &resp->xdr; |
1757 | __be32 *p; | |
074fe897 AA |
1758 | __be32 status; |
1759 | ||
557ce264 | 1760 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1761 | |
abfabf8c | 1762 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 1763 | if (status) |
abfabf8c | 1764 | return status; |
074fe897 | 1765 | |
f5236013 BF |
1766 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
1767 | if (!p) { | |
1768 | WARN_ON_ONCE(1); | |
1769 | return nfserr_serverfault; | |
1770 | } | |
1771 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
1772 | xdr_commit_encode(xdr); | |
074fe897 | 1773 | |
557ce264 | 1774 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 1775 | return slot->sl_status; |
074fe897 AA |
1776 | } |
1777 | ||
0733d213 AA |
1778 | /* |
1779 | * Set the exchange_id flags returned by the server. | |
1780 | */ | |
1781 | static void | |
1782 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1783 | { | |
1784 | /* pNFS is not supported */ | |
1785 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1786 | ||
1787 | /* Referrals are supported, Migration is not. */ | |
1788 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1789 | ||
1790 | /* set the wire flags to return to client. */ | |
1791 | clid->flags = new->cl_exchange_flags; | |
1792 | } | |
1793 | ||
631fc9ea BF |
1794 | static bool client_has_state(struct nfs4_client *clp) |
1795 | { | |
1796 | /* | |
1797 | * Note clp->cl_openowners check isn't quite right: there's no | |
1798 | * need to count owners without stateid's. | |
1799 | * | |
1800 | * Also note we should probably be using this in 4.0 case too. | |
1801 | */ | |
6eccece9 BF |
1802 | return !list_empty(&clp->cl_openowners) |
1803 | || !list_empty(&clp->cl_delegations) | |
1804 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1805 | } |
1806 | ||
069b6ad4 AA |
1807 | __be32 |
1808 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1809 | struct nfsd4_compound_state *cstate, | |
1810 | struct nfsd4_exchange_id *exid) | |
1811 | { | |
0733d213 | 1812 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1813 | __be32 status; |
363168b4 | 1814 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1815 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1816 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1817 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1818 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1819 | |
363168b4 | 1820 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1821 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1822 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1823 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1824 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1825 | |
a084daf5 | 1826 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1827 | return nfserr_inval; |
1828 | ||
0733d213 | 1829 | switch (exid->spa_how) { |
57266a6e BF |
1830 | case SP4_MACH_CRED: |
1831 | if (!svc_rqst_integrity_protected(rqstp)) | |
1832 | return nfserr_inval; | |
0733d213 AA |
1833 | case SP4_NONE: |
1834 | break; | |
063b0fb9 BF |
1835 | default: /* checked by xdr code */ |
1836 | WARN_ON_ONCE(1); | |
0733d213 | 1837 | case SP4_SSV: |
dd30333c | 1838 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
1839 | } |
1840 | ||
2dbb269d | 1841 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1842 | nfs4_lock_state(); |
382a62e7 | 1843 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1844 | if (conf) { |
83e08fd4 BF |
1845 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1846 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1847 | ||
136e658d BF |
1848 | if (update) { |
1849 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1850 | status = nfserr_inval; |
1a308118 BF |
1851 | goto out; |
1852 | } | |
57266a6e BF |
1853 | if (!mach_creds_match(conf, rqstp)) { |
1854 | status = nfserr_wrong_cred; | |
1855 | goto out; | |
1856 | } | |
136e658d | 1857 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1858 | status = nfserr_perm; |
136e658d BF |
1859 | goto out; |
1860 | } | |
1861 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1862 | status = nfserr_not_same; |
1863 | goto out; | |
1864 | } | |
136e658d BF |
1865 | /* case 6 */ |
1866 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1867 | new = conf; | |
1868 | goto out_copy; | |
0733d213 | 1869 | } |
136e658d | 1870 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1871 | if (client_has_state(conf)) { |
1872 | status = nfserr_clid_inuse; | |
0733d213 AA |
1873 | goto out; |
1874 | } | |
1875 | expire_client(conf); | |
1876 | goto out_new; | |
1877 | } | |
136e658d | 1878 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1879 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1880 | new = conf; |
1881 | goto out_copy; | |
1882 | } | |
1883 | /* case 5, client reboot */ | |
136e658d | 1884 | goto out_new; |
6ddbbbfe MS |
1885 | } |
1886 | ||
2dbb269d | 1887 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1888 | status = nfserr_noent; |
1889 | goto out; | |
0733d213 AA |
1890 | } |
1891 | ||
a99454aa | 1892 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1893 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1894 | expire_client(unconf); |
0733d213 | 1895 | |
2dbb269d | 1896 | /* case 1 (normal case) */ |
0733d213 | 1897 | out_new: |
2216d449 | 1898 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1899 | if (new == NULL) { |
4731030d | 1900 | status = nfserr_jukebox; |
0733d213 AA |
1901 | goto out; |
1902 | } | |
4f540e29 | 1903 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 1904 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 1905 | |
c212cecf | 1906 | gen_clid(new, nn); |
ac55fdc4 | 1907 | add_to_unconfirmed(new); |
0733d213 AA |
1908 | out_copy: |
1909 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1910 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1911 | ||
778df3f0 | 1912 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1913 | nfsd4_set_ex_flags(new, exid); |
1914 | ||
1915 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1916 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1917 | status = nfs_ok; |
1918 | ||
1919 | out: | |
1920 | nfs4_unlock_state(); | |
0733d213 | 1921 | return status; |
069b6ad4 AA |
1922 | } |
1923 | ||
57b7b43b | 1924 | static __be32 |
88e588d5 | 1925 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1926 | { |
88e588d5 AA |
1927 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1928 | slot_seqid); | |
b85d4c01 BH |
1929 | |
1930 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1931 | if (slot_inuse) { |
1932 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1933 | return nfserr_jukebox; |
1934 | else | |
1935 | return nfserr_seq_misordered; | |
1936 | } | |
f6d82485 | 1937 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1938 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1939 | return nfs_ok; |
88e588d5 | 1940 | if (seqid == slot_seqid) |
b85d4c01 | 1941 | return nfserr_replay_cache; |
b85d4c01 BH |
1942 | return nfserr_seq_misordered; |
1943 | } | |
1944 | ||
49557cc7 AA |
1945 | /* |
1946 | * Cache the create session result into the create session single DRC | |
1947 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1948 | * Do this for solo or embedded create session operations. | |
1949 | */ | |
1950 | static void | |
1951 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1952 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1953 | { |
1954 | slot->sl_status = nfserr; | |
1955 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1956 | } | |
1957 | ||
1958 | static __be32 | |
1959 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1960 | struct nfsd4_clid_slot *slot) | |
1961 | { | |
1962 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1963 | return slot->sl_status; | |
1964 | } | |
1965 | ||
1b74c25b MJ |
1966 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1967 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1968 | 1 + /* MIN tag is length with zero, only length */ \ | |
1969 | 3 + /* version, opcount, opcode */ \ | |
1970 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1971 | /* seqid, slotID, slotID, cache */ \ | |
1972 | 4 ) * sizeof(__be32)) | |
1973 | ||
1974 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1975 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1976 | 1 + /* status */ \ | |
1977 | 1 + /* MIN tag is length with zero, only length */ \ | |
1978 | 3 + /* opcount, opcode, opstatus*/ \ | |
1979 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1980 | /* seqid, slotID, slotID, slotID, status */ \ | |
1981 | 5 ) * sizeof(__be32)) | |
1982 | ||
55c760cf | 1983 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 1984 | { |
55c760cf BF |
1985 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
1986 | ||
373cd409 BF |
1987 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
1988 | return nfserr_toosmall; | |
1989 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
1990 | return nfserr_toosmall; | |
55c760cf BF |
1991 | ca->headerpadsz = 0; |
1992 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
1993 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
1994 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
1995 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
1996 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
1997 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
1998 | /* | |
1999 | * Note decreasing slot size below client's request may make it | |
2000 | * difficult for client to function correctly, whereas | |
2001 | * decreasing the number of slots will (just?) affect | |
2002 | * performance. When short on memory we therefore prefer to | |
2003 | * decrease number of slots instead of their size. Clients that | |
2004 | * request larger slots than they need will get poor results: | |
2005 | */ | |
2006 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2007 | if (!ca->maxreqs) | |
2008 | return nfserr_jukebox; | |
2009 | ||
373cd409 | 2010 | return nfs_ok; |
1b74c25b MJ |
2011 | } |
2012 | ||
8a891633 KM |
2013 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2014 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2015 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2016 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2017 | ||
06b332a5 | 2018 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2019 | { |
06b332a5 BF |
2020 | ca->headerpadsz = 0; |
2021 | ||
2022 | /* | |
2023 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2024 | * don't even do gss on the backchannel yet. But this is still | |
2025 | * less than 1k. Tighten up this estimate in the unlikely event | |
2026 | * it turns out to be a problem for some client: | |
2027 | */ | |
8a891633 | 2028 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2029 | return nfserr_toosmall; |
8a891633 | 2030 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2031 | return nfserr_toosmall; |
2032 | ca->maxresp_cached = 0; | |
2033 | if (ca->maxops < 2) | |
2034 | return nfserr_toosmall; | |
2035 | ||
2036 | return nfs_ok; | |
1b74c25b MJ |
2037 | } |
2038 | ||
b78724b7 BF |
2039 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2040 | { | |
2041 | switch (cbs->flavor) { | |
2042 | case RPC_AUTH_NULL: | |
2043 | case RPC_AUTH_UNIX: | |
2044 | return nfs_ok; | |
2045 | default: | |
2046 | /* | |
2047 | * GSS case: the spec doesn't allow us to return this | |
2048 | * error. But it also doesn't allow us not to support | |
2049 | * GSS. | |
2050 | * I'd rather this fail hard than return some error the | |
2051 | * client might think it can already handle: | |
2052 | */ | |
2053 | return nfserr_encr_alg_unsupp; | |
2054 | } | |
2055 | } | |
2056 | ||
069b6ad4 AA |
2057 | __be32 |
2058 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2059 | struct nfsd4_compound_state *cstate, | |
2060 | struct nfsd4_create_session *cr_ses) | |
2061 | { | |
363168b4 | 2062 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2063 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 2064 | struct nfsd4_session *new; |
81f0b2a4 | 2065 | struct nfsd4_conn *conn; |
49557cc7 | 2066 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2067 | __be32 status = 0; |
8daae4dc | 2068 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2069 | |
a62573dc MJ |
2070 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2071 | return nfserr_inval; | |
b78724b7 BF |
2072 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2073 | if (status) | |
2074 | return status; | |
55c760cf | 2075 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2076 | if (status) |
2077 | return status; | |
2078 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2079 | if (status) |
f403e450 | 2080 | goto out_release_drc_mem; |
81f0b2a4 | 2081 | status = nfserr_jukebox; |
60810e54 | 2082 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2083 | if (!new) |
2084 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2085 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2086 | if (!conn) | |
2087 | goto out_free_session; | |
a62573dc | 2088 | |
ec6b5d7b | 2089 | nfs4_lock_state(); |
0a7ec377 | 2090 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2091 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2092 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2093 | |
2094 | if (conf) { | |
57266a6e BF |
2095 | status = nfserr_wrong_cred; |
2096 | if (!mach_creds_match(conf, rqstp)) | |
2097 | goto out_free_conn; | |
49557cc7 AA |
2098 | cs_slot = &conf->cl_cs_slot; |
2099 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2100 | if (status == nfserr_replay_cache) { |
49557cc7 | 2101 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2102 | goto out_free_conn; |
49557cc7 | 2103 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2104 | status = nfserr_seq_misordered; |
81f0b2a4 | 2105 | goto out_free_conn; |
ec6b5d7b | 2106 | } |
ec6b5d7b | 2107 | } else if (unconf) { |
8f9d3d3b | 2108 | struct nfs4_client *old; |
ec6b5d7b | 2109 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 2110 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2111 | status = nfserr_clid_inuse; |
81f0b2a4 | 2112 | goto out_free_conn; |
ec6b5d7b | 2113 | } |
57266a6e BF |
2114 | status = nfserr_wrong_cred; |
2115 | if (!mach_creds_match(unconf, rqstp)) | |
2116 | goto out_free_conn; | |
49557cc7 AA |
2117 | cs_slot = &unconf->cl_cs_slot; |
2118 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2119 | if (status) { |
2120 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2121 | status = nfserr_seq_misordered; |
81f0b2a4 | 2122 | goto out_free_conn; |
ec6b5d7b | 2123 | } |
382a62e7 | 2124 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2125 | if (old) { |
2126 | status = mark_client_expired(old); | |
2127 | if (status) | |
2128 | goto out_free_conn; | |
8f9d3d3b | 2129 | expire_client(old); |
221a6876 | 2130 | } |
8f9d3d3b | 2131 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2132 | conf = unconf; |
2133 | } else { | |
2134 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2135 | goto out_free_conn; |
ec6b5d7b | 2136 | } |
81f0b2a4 | 2137 | status = nfs_ok; |
408b79bc BF |
2138 | /* |
2139 | * We do not support RDMA or persistent sessions | |
2140 | */ | |
2141 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2142 | cr_ses->flags &= ~SESSION4_RDMA; | |
2143 | ||
81f0b2a4 BF |
2144 | init_session(rqstp, new, conf, cr_ses); |
2145 | nfsd4_init_conn(rqstp, conn, new); | |
2146 | ||
ac7c46f2 | 2147 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2148 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2149 | cs_slot->sl_seqid++; |
49557cc7 | 2150 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2151 | |
49557cc7 AA |
2152 | /* cache solo and embedded create sessions under the state lock */ |
2153 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 2154 | nfs4_unlock_state(); |
ec6b5d7b | 2155 | return status; |
81f0b2a4 | 2156 | out_free_conn: |
266533c6 | 2157 | nfs4_unlock_state(); |
81f0b2a4 BF |
2158 | free_conn(conn); |
2159 | out_free_session: | |
2160 | __free_session(new); | |
55c760cf BF |
2161 | out_release_drc_mem: |
2162 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2163 | return status; |
069b6ad4 AA |
2164 | } |
2165 | ||
1d1bc8f2 BF |
2166 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2167 | { | |
2168 | switch (*dir) { | |
2169 | case NFS4_CDFC4_FORE: | |
2170 | case NFS4_CDFC4_BACK: | |
2171 | return nfs_ok; | |
2172 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2173 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2174 | *dir = NFS4_CDFC4_BOTH; | |
2175 | return nfs_ok; | |
2176 | }; | |
2177 | return nfserr_inval; | |
2178 | } | |
2179 | ||
cb73a9f4 BF |
2180 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2181 | { | |
2182 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2183 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2184 | __be32 status; |
cb73a9f4 | 2185 | |
b78724b7 BF |
2186 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2187 | if (status) | |
2188 | return status; | |
c9a49628 | 2189 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2190 | session->se_cb_prog = bc->bc_cb_program; |
2191 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2192 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2193 | |
2194 | nfsd4_probe_callback(session->se_client); | |
2195 | ||
2196 | return nfs_ok; | |
2197 | } | |
2198 | ||
1d1bc8f2 BF |
2199 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2200 | struct nfsd4_compound_state *cstate, | |
2201 | struct nfsd4_bind_conn_to_session *bcts) | |
2202 | { | |
2203 | __be32 status; | |
3ba63671 | 2204 | struct nfsd4_conn *conn; |
4f6e6c17 | 2205 | struct nfsd4_session *session; |
d4e19e70 TM |
2206 | struct net *net = SVC_NET(rqstp); |
2207 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2208 | |
2209 | if (!nfsd4_last_compound_op(rqstp)) | |
2210 | return nfserr_not_only_op; | |
4f6e6c17 | 2211 | nfs4_lock_state(); |
c9a49628 | 2212 | spin_lock(&nn->client_lock); |
d4e19e70 | 2213 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2214 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2215 | if (!session) |
d4e19e70 | 2216 | goto out_no_session; |
57266a6e BF |
2217 | status = nfserr_wrong_cred; |
2218 | if (!mach_creds_match(session->se_client, rqstp)) | |
2219 | goto out; | |
1d1bc8f2 | 2220 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2221 | if (status) |
4f6e6c17 | 2222 | goto out; |
3ba63671 | 2223 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2224 | status = nfserr_jukebox; |
3ba63671 | 2225 | if (!conn) |
4f6e6c17 BF |
2226 | goto out; |
2227 | nfsd4_init_conn(rqstp, conn, session); | |
2228 | status = nfs_ok; | |
2229 | out: | |
d4e19e70 TM |
2230 | nfsd4_put_session(session); |
2231 | out_no_session: | |
4f6e6c17 BF |
2232 | nfs4_unlock_state(); |
2233 | return status; | |
1d1bc8f2 BF |
2234 | } |
2235 | ||
5d4cec2f BF |
2236 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2237 | { | |
2238 | if (!session) | |
2239 | return 0; | |
2240 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2241 | } | |
2242 | ||
069b6ad4 AA |
2243 | __be32 |
2244 | nfsd4_destroy_session(struct svc_rqst *r, | |
2245 | struct nfsd4_compound_state *cstate, | |
2246 | struct nfsd4_destroy_session *sessionid) | |
2247 | { | |
e10e0cfc | 2248 | struct nfsd4_session *ses; |
abcdff09 | 2249 | __be32 status; |
f0f51f5c | 2250 | int ref_held_by_me = 0; |
d4e19e70 TM |
2251 | struct net *net = SVC_NET(r); |
2252 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2253 | |
abcdff09 BF |
2254 | nfs4_lock_state(); |
2255 | status = nfserr_not_only_op; | |
5d4cec2f | 2256 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2257 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2258 | goto out; |
f0f51f5c | 2259 | ref_held_by_me++; |
57716355 | 2260 | } |
e10e0cfc | 2261 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2262 | spin_lock(&nn->client_lock); |
d4e19e70 | 2263 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2264 | if (!ses) |
2265 | goto out_client_lock; | |
57266a6e BF |
2266 | status = nfserr_wrong_cred; |
2267 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2268 | goto out_put_session; |
f0f51f5c | 2269 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2270 | if (status) |
f0f51f5c | 2271 | goto out_put_session; |
e10e0cfc | 2272 | unhash_session(ses); |
c9a49628 | 2273 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2274 | |
84f5f7cc | 2275 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2276 | |
c9a49628 | 2277 | spin_lock(&nn->client_lock); |
e10e0cfc | 2278 | status = nfs_ok; |
f0f51f5c | 2279 | out_put_session: |
d4e19e70 | 2280 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2281 | out_client_lock: |
2282 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2283 | out: |
abcdff09 | 2284 | nfs4_unlock_state(); |
e10e0cfc | 2285 | return status; |
069b6ad4 AA |
2286 | } |
2287 | ||
a663bdd8 | 2288 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2289 | { |
2290 | struct nfsd4_conn *c; | |
2291 | ||
2292 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2293 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2294 | return c; |
2295 | } | |
2296 | } | |
2297 | return NULL; | |
2298 | } | |
2299 | ||
57266a6e | 2300 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2301 | { |
2302 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2303 | struct nfsd4_conn *c; |
57266a6e | 2304 | __be32 status = nfs_ok; |
21b75b01 | 2305 | int ret; |
328ead28 BF |
2306 | |
2307 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2308 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2309 | if (c) |
2310 | goto out_free; | |
2311 | status = nfserr_conn_not_bound_to_session; | |
2312 | if (clp->cl_mach_cred) | |
2313 | goto out_free; | |
328ead28 BF |
2314 | __nfsd4_hash_conn(new, ses); |
2315 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2316 | ret = nfsd4_register_conn(new); |
2317 | if (ret) | |
2318 | /* oops; xprt is already down: */ | |
2319 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2320 | return nfs_ok; |
2321 | out_free: | |
2322 | spin_unlock(&clp->cl_lock); | |
2323 | free_conn(new); | |
2324 | return status; | |
328ead28 BF |
2325 | } |
2326 | ||
868b89c3 MJ |
2327 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2328 | { | |
2329 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2330 | ||
2331 | return args->opcnt > session->se_fchannel.maxops; | |
2332 | } | |
2333 | ||
ae82a8d0 MJ |
2334 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2335 | struct nfsd4_session *session) | |
2336 | { | |
2337 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2338 | ||
2339 | return xb->len > session->se_fchannel.maxreq_sz; | |
2340 | } | |
2341 | ||
069b6ad4 | 2342 | __be32 |
b85d4c01 | 2343 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2344 | struct nfsd4_compound_state *cstate, |
2345 | struct nfsd4_sequence *seq) | |
2346 | { | |
f9bb94c4 | 2347 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2348 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2349 | struct nfsd4_session *session; |
221a6876 | 2350 | struct nfs4_client *clp; |
b85d4c01 | 2351 | struct nfsd4_slot *slot; |
a663bdd8 | 2352 | struct nfsd4_conn *conn; |
57b7b43b | 2353 | __be32 status; |
47ee5298 | 2354 | int buflen; |
d4e19e70 TM |
2355 | struct net *net = SVC_NET(rqstp); |
2356 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2357 | |
f9bb94c4 AA |
2358 | if (resp->opcnt != 1) |
2359 | return nfserr_sequence_pos; | |
2360 | ||
a663bdd8 BF |
2361 | /* |
2362 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2363 | * below. | |
2364 | */ | |
2365 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2366 | if (!conn) | |
2367 | return nfserr_jukebox; | |
2368 | ||
c9a49628 | 2369 | spin_lock(&nn->client_lock); |
d4e19e70 | 2370 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2371 | if (!session) |
221a6876 BF |
2372 | goto out_no_session; |
2373 | clp = session->se_client; | |
b85d4c01 | 2374 | |
868b89c3 MJ |
2375 | status = nfserr_too_many_ops; |
2376 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2377 | goto out_put_session; |
868b89c3 | 2378 | |
ae82a8d0 MJ |
2379 | status = nfserr_req_too_big; |
2380 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2381 | goto out_put_session; |
ae82a8d0 | 2382 | |
b85d4c01 | 2383 | status = nfserr_badslot; |
6c18ba9f | 2384 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2385 | goto out_put_session; |
b85d4c01 | 2386 | |
557ce264 | 2387 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2388 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2389 | ||
a8dfdaeb AA |
2390 | /* We do not negotiate the number of slots yet, so set the |
2391 | * maxslots to the session maxreqs which is used to encode | |
2392 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2393 | seq->maxslots = session->se_fchannel.maxreqs; | |
2394 | ||
73e79482 BF |
2395 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2396 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2397 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2398 | status = nfserr_seq_misordered; |
2399 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2400 | goto out_put_session; |
b85d4c01 BH |
2401 | cstate->slot = slot; |
2402 | cstate->session = session; | |
4b24ca7d | 2403 | cstate->clp = clp; |
da3846a2 | 2404 | /* Return the cached reply status and set cstate->status |
557ce264 | 2405 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2406 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2407 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2408 | goto out; |
b85d4c01 BH |
2409 | } |
2410 | if (status) | |
66b2b9b2 | 2411 | goto out_put_session; |
b85d4c01 | 2412 | |
57266a6e | 2413 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2414 | conn = NULL; |
57266a6e BF |
2415 | if (status) |
2416 | goto out_put_session; | |
328ead28 | 2417 | |
47ee5298 BF |
2418 | buflen = (seq->cachethis) ? |
2419 | session->se_fchannel.maxresp_cached : | |
2420 | session->se_fchannel.maxresp_sz; | |
2421 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2422 | nfserr_rep_too_big; | |
a5cddc88 | 2423 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2424 | goto out_put_session; |
32aaa62e | 2425 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2426 | |
2427 | status = nfs_ok; | |
b85d4c01 | 2428 | /* Success! bump slot seqid */ |
b85d4c01 | 2429 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2430 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2431 | if (seq->cachethis) |
2432 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2433 | else |
2434 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2435 | |
2436 | cstate->slot = slot; | |
2437 | cstate->session = session; | |
4b24ca7d | 2438 | cstate->clp = clp; |
b85d4c01 | 2439 | |
b85d4c01 | 2440 | out: |
221a6876 BF |
2441 | switch (clp->cl_cb_state) { |
2442 | case NFSD4_CB_DOWN: | |
2443 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2444 | break; | |
2445 | case NFSD4_CB_FAULT: | |
2446 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2447 | break; | |
2448 | default: | |
2449 | seq->status_flags = 0; | |
aaf84eb9 | 2450 | } |
3bd64a5b BF |
2451 | if (!list_empty(&clp->cl_revoked)) |
2452 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2453 | out_no_session: |
3f42d2c4 KM |
2454 | if (conn) |
2455 | free_conn(conn); | |
c9a49628 | 2456 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2457 | return status; |
66b2b9b2 | 2458 | out_put_session: |
d4e19e70 | 2459 | nfsd4_put_session_locked(session); |
221a6876 | 2460 | goto out_no_session; |
069b6ad4 AA |
2461 | } |
2462 | ||
b607664e TM |
2463 | void |
2464 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2465 | { | |
2466 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2467 | ||
2468 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2469 | if (cs->status != nfserr_replay_cache) { |
2470 | nfsd4_store_cache_entry(resp); | |
2471 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2472 | } | |
d4e19e70 | 2473 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2474 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2475 | } else if (cs->clp) |
2476 | put_client_renew(cs->clp); | |
b607664e TM |
2477 | } |
2478 | ||
345c2842 MJ |
2479 | __be32 |
2480 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2481 | { | |
2482 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2483 | __be32 status = 0; |
8daae4dc | 2484 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2485 | |
2486 | nfs4_lock_state(); | |
0a7ec377 | 2487 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2488 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2489 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2490 | |
2491 | if (conf) { | |
2492 | clp = conf; | |
2493 | ||
c0293b01 | 2494 | if (client_has_state(conf)) { |
345c2842 MJ |
2495 | status = nfserr_clientid_busy; |
2496 | goto out; | |
2497 | } | |
2498 | } else if (unconf) | |
2499 | clp = unconf; | |
2500 | else { | |
2501 | status = nfserr_stale_clientid; | |
2502 | goto out; | |
2503 | } | |
57266a6e BF |
2504 | if (!mach_creds_match(clp, rqstp)) { |
2505 | status = nfserr_wrong_cred; | |
2506 | goto out; | |
2507 | } | |
345c2842 MJ |
2508 | expire_client(clp); |
2509 | out: | |
2510 | nfs4_unlock_state(); | |
345c2842 MJ |
2511 | return status; |
2512 | } | |
2513 | ||
4dc6ec00 BF |
2514 | __be32 |
2515 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2516 | { | |
57b7b43b | 2517 | __be32 status = 0; |
bcecf1cc | 2518 | |
4dc6ec00 BF |
2519 | if (rc->rca_one_fs) { |
2520 | if (!cstate->current_fh.fh_dentry) | |
2521 | return nfserr_nofilehandle; | |
2522 | /* | |
2523 | * We don't take advantage of the rca_one_fs case. | |
2524 | * That's OK, it's optional, we can safely ignore it. | |
2525 | */ | |
2526 | return nfs_ok; | |
2527 | } | |
bcecf1cc | 2528 | |
4dc6ec00 | 2529 | nfs4_lock_state(); |
bcecf1cc | 2530 | status = nfserr_complete_already; |
a52d726b JL |
2531 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2532 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2533 | goto out; |
2534 | ||
2535 | status = nfserr_stale_clientid; | |
2536 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2537 | /* |
2538 | * The following error isn't really legal. | |
2539 | * But we only get here if the client just explicitly | |
2540 | * destroyed the client. Surely it no longer cares what | |
2541 | * error it gets back on an operation for the dead | |
2542 | * client. | |
2543 | */ | |
bcecf1cc MJ |
2544 | goto out; |
2545 | ||
2546 | status = nfs_ok; | |
2a4317c5 | 2547 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2548 | out: |
4dc6ec00 | 2549 | nfs4_unlock_state(); |
bcecf1cc | 2550 | return status; |
4dc6ec00 BF |
2551 | } |
2552 | ||
b37ad28b | 2553 | __be32 |
b591480b BF |
2554 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2555 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2556 | { |
a084daf5 | 2557 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2558 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2559 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2560 | __be32 status; |
c212cecf SK |
2561 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2562 | ||
63db4632 | 2563 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2564 | nfs4_lock_state(); |
382a62e7 | 2565 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2566 | if (conf) { |
63db4632 | 2567 | /* case 0: */ |
1da177e4 | 2568 | status = nfserr_clid_inuse; |
e203d506 BF |
2569 | if (clp_used_exchangeid(conf)) |
2570 | goto out; | |
026722c2 | 2571 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2572 | char addr_str[INET6_ADDRSTRLEN]; |
2573 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2574 | sizeof(addr_str)); | |
2575 | dprintk("NFSD: setclientid: string in use by client " | |
2576 | "at %s\n", addr_str); | |
1da177e4 LT |
2577 | goto out; |
2578 | } | |
1da177e4 | 2579 | } |
a99454aa | 2580 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2581 | if (unconf) |
2582 | expire_client(unconf); | |
3e772463 | 2583 | status = nfserr_jukebox; |
2216d449 | 2584 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2585 | if (new == NULL) |
2586 | goto out; | |
34b232bb | 2587 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2588 | /* case 1: probable callback update */ |
1da177e4 | 2589 | copy_clid(new, conf); |
34b232bb | 2590 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2591 | gen_clid(new, nn); |
8323c3b2 | 2592 | new->cl_minorversion = 0; |
6f3d772f | 2593 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2594 | add_to_unconfirmed(new); |
1da177e4 LT |
2595 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2596 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2597 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2598 | status = nfs_ok; | |
2599 | out: | |
2600 | nfs4_unlock_state(); | |
2601 | return status; | |
2602 | } | |
2603 | ||
2604 | ||
b37ad28b | 2605 | __be32 |
b591480b BF |
2606 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2607 | struct nfsd4_compound_state *cstate, | |
2608 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2609 | { |
21ab45a4 | 2610 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2611 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2612 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2613 | __be32 status; |
7f2210fa | 2614 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2615 | |
2c142baa | 2616 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2617 | return nfserr_stale_clientid; |
1da177e4 | 2618 | nfs4_lock_state(); |
21ab45a4 | 2619 | |
8daae4dc | 2620 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2621 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2622 | /* |
8695b90a BF |
2623 | * We try hard to give out unique clientid's, so if we get an |
2624 | * attempt to confirm the same clientid with a different cred, | |
2625 | * there's a bug somewhere. Let's charitably assume it's our | |
2626 | * bug. | |
a186e767 | 2627 | */ |
8695b90a BF |
2628 | status = nfserr_serverfault; |
2629 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2630 | goto out; | |
2631 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2632 | goto out; | |
63db4632 | 2633 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2634 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2635 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2636 | status = nfs_ok; |
90d700b7 BF |
2637 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2638 | status = nfserr_stale_clientid; | |
2639 | goto out; | |
2640 | } | |
2641 | status = nfs_ok; | |
2642 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2643 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2644 | nfsd4_probe_callback(conf); | |
2645 | expire_client(unconf); | |
90d700b7 | 2646 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2647 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2648 | if (conf) { |
2649 | status = mark_client_expired(conf); | |
2650 | if (status) | |
2651 | goto out; | |
8695b90a | 2652 | expire_client(conf); |
221a6876 | 2653 | } |
8695b90a | 2654 | move_to_confirmed(unconf); |
f3d03b92 | 2655 | nfsd4_probe_callback(unconf); |
08e8987c | 2656 | } |
1da177e4 | 2657 | out: |
1da177e4 LT |
2658 | nfs4_unlock_state(); |
2659 | return status; | |
2660 | } | |
2661 | ||
32513b40 BF |
2662 | static struct nfs4_file *nfsd4_alloc_file(void) |
2663 | { | |
2664 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2665 | } | |
2666 | ||
1da177e4 | 2667 | /* OPEN Share state helper functions */ |
32513b40 | 2668 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2669 | { |
1da177e4 LT |
2670 | unsigned int hashval = file_hashval(ino); |
2671 | ||
950e0118 TM |
2672 | lockdep_assert_held(&state_lock); |
2673 | ||
32513b40 | 2674 | atomic_set(&fp->fi_ref, 1); |
32513b40 BF |
2675 | INIT_LIST_HEAD(&fp->fi_stateids); |
2676 | INIT_LIST_HEAD(&fp->fi_delegations); | |
950e0118 TM |
2677 | ihold(ino); |
2678 | fp->fi_inode = ino; | |
32513b40 BF |
2679 | fp->fi_had_conflict = false; |
2680 | fp->fi_lease = NULL; | |
2681 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2682 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 2683 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
2684 | } |
2685 | ||
e8ff2a84 | 2686 | void |
1da177e4 LT |
2687 | nfsd4_free_slabs(void) |
2688 | { | |
abf1135b CH |
2689 | kmem_cache_destroy(openowner_slab); |
2690 | kmem_cache_destroy(lockowner_slab); | |
2691 | kmem_cache_destroy(file_slab); | |
2692 | kmem_cache_destroy(stateid_slab); | |
2693 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 2694 | } |
1da177e4 | 2695 | |
72083396 | 2696 | int |
e60d4398 N |
2697 | nfsd4_init_slabs(void) |
2698 | { | |
fe0750e5 BF |
2699 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2700 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2701 | if (openowner_slab == NULL) | |
abf1135b | 2702 | goto out; |
fe0750e5 | 2703 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 2704 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2705 | if (lockowner_slab == NULL) |
abf1135b | 2706 | goto out_free_openowner_slab; |
e60d4398 | 2707 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 2708 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 2709 | if (file_slab == NULL) |
abf1135b | 2710 | goto out_free_lockowner_slab; |
5ac049ac | 2711 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2712 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 2713 | if (stateid_slab == NULL) |
abf1135b | 2714 | goto out_free_file_slab; |
5b2d21c1 | 2715 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2716 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 2717 | if (deleg_slab == NULL) |
abf1135b | 2718 | goto out_free_stateid_slab; |
e60d4398 | 2719 | return 0; |
abf1135b CH |
2720 | |
2721 | out_free_stateid_slab: | |
2722 | kmem_cache_destroy(stateid_slab); | |
2723 | out_free_file_slab: | |
2724 | kmem_cache_destroy(file_slab); | |
2725 | out_free_lockowner_slab: | |
2726 | kmem_cache_destroy(lockowner_slab); | |
2727 | out_free_openowner_slab: | |
2728 | kmem_cache_destroy(openowner_slab); | |
2729 | out: | |
e60d4398 N |
2730 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
2731 | return -ENOMEM; | |
1da177e4 LT |
2732 | } |
2733 | ||
ff194bd9 | 2734 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2735 | { |
ff194bd9 BF |
2736 | rp->rp_status = nfserr_serverfault; |
2737 | rp->rp_buflen = 0; | |
2738 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2739 | } |
2740 | ||
fe0750e5 | 2741 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2742 | { |
1da177e4 | 2743 | struct nfs4_stateowner *sop; |
1da177e4 | 2744 | |
fe0750e5 | 2745 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2746 | if (!sop) |
2747 | return NULL; | |
2748 | ||
2749 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2750 | if (!sop->so_owner.data) { | |
fe0750e5 | 2751 | kmem_cache_free(slab, sop); |
1da177e4 | 2752 | return NULL; |
ff194bd9 BF |
2753 | } |
2754 | sop->so_owner.len = owner->len; | |
2755 | ||
ea1da636 | 2756 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2757 | sop->so_client = clp; |
2758 | init_nfs4_replay(&sop->so_replay); | |
2759 | return sop; | |
2760 | } | |
2761 | ||
fe0750e5 | 2762 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2763 | { |
9b531137 SK |
2764 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2765 | ||
2766 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2767 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2768 | } |
2769 | ||
fe0750e5 | 2770 | static struct nfs4_openowner * |
db24b3b4 JL |
2771 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
2772 | struct nfsd4_open *open, | |
2773 | struct nfsd4_compound_state *cstate) | |
2774 | { | |
fe0750e5 | 2775 | struct nfs4_openowner *oo; |
ff194bd9 | 2776 | |
fe0750e5 BF |
2777 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2778 | if (!oo) | |
ff194bd9 | 2779 | return NULL; |
fe0750e5 BF |
2780 | oo->oo_owner.so_is_open_owner = 1; |
2781 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2782 | oo->oo_flags = NFS4_OO_NEW; |
db24b3b4 JL |
2783 | if (nfsd4_has_session(cstate)) |
2784 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 2785 | oo->oo_time = 0; |
38c387b5 | 2786 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2787 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2788 | hash_openowner(oo, clp, strhashval); | |
2789 | return oo; | |
1da177e4 LT |
2790 | } |
2791 | ||
996e0938 | 2792 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2793 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2794 | |
3abdb607 | 2795 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 2796 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 2797 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2798 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2799 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2800 | get_nfs4_file(fp); |
1da177e4 | 2801 | stp->st_file = fp; |
1da177e4 LT |
2802 | stp->st_access_bmap = 0; |
2803 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2804 | set_access(open->op_share_access, stp); |
ce0fc43c | 2805 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2806 | stp->st_openstp = NULL; |
1da177e4 LT |
2807 | } |
2808 | ||
fd39ca9a | 2809 | static void |
73758fed | 2810 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2811 | { |
73758fed SK |
2812 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2813 | ||
fe0750e5 | 2814 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2815 | |
73758fed | 2816 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2817 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2818 | } |
2819 | ||
1da177e4 | 2820 | static int |
599e0a22 BF |
2821 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2822 | clientid_t *clid) | |
2823 | { | |
2824 | return (sop->so_owner.len == owner->len) && | |
2825 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2826 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2827 | } |
2828 | ||
fe0750e5 | 2829 | static struct nfs4_openowner * |
9b531137 SK |
2830 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2831 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2832 | { |
a50d2ad1 BF |
2833 | struct nfs4_stateowner *so; |
2834 | struct nfs4_openowner *oo; | |
d15c077e | 2835 | struct nfs4_client *clp; |
1da177e4 | 2836 | |
9b531137 | 2837 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2838 | if (!so->so_is_open_owner) |
2839 | continue; | |
a50d2ad1 BF |
2840 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2841 | oo = openowner(so); | |
d15c077e BF |
2842 | clp = oo->oo_owner.so_client; |
2843 | if ((bool)clp->cl_minorversion != sessions) | |
2844 | return NULL; | |
a50d2ad1 BF |
2845 | renew_client(oo->oo_owner.so_client); |
2846 | return oo; | |
2847 | } | |
1da177e4 LT |
2848 | } |
2849 | return NULL; | |
2850 | } | |
2851 | ||
2852 | /* search file_hashtbl[] for file */ | |
2853 | static struct nfs4_file * | |
950e0118 | 2854 | find_file_locked(struct inode *ino) |
1da177e4 LT |
2855 | { |
2856 | unsigned int hashval = file_hashval(ino); | |
2857 | struct nfs4_file *fp; | |
2858 | ||
950e0118 TM |
2859 | lockdep_assert_held(&state_lock); |
2860 | ||
89876f8c | 2861 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2862 | if (fp->fi_inode == ino) { |
2863 | get_nfs4_file(fp); | |
1da177e4 | 2864 | return fp; |
13cd2184 | 2865 | } |
1da177e4 LT |
2866 | } |
2867 | return NULL; | |
2868 | } | |
2869 | ||
950e0118 TM |
2870 | static struct nfs4_file * |
2871 | find_file(struct inode *ino) | |
2872 | { | |
2873 | struct nfs4_file *fp; | |
2874 | ||
2875 | spin_lock(&state_lock); | |
2876 | fp = find_file_locked(ino); | |
2877 | spin_unlock(&state_lock); | |
2878 | return fp; | |
2879 | } | |
2880 | ||
2881 | static struct nfs4_file * | |
2882 | find_or_add_file(struct inode *ino, struct nfs4_file *new) | |
2883 | { | |
2884 | struct nfs4_file *fp; | |
2885 | ||
2886 | spin_lock(&state_lock); | |
2887 | fp = find_file_locked(ino); | |
2888 | if (fp == NULL) { | |
2889 | nfsd4_init_file(new, ino); | |
2890 | fp = new; | |
2891 | } | |
2892 | spin_unlock(&state_lock); | |
2893 | ||
2894 | return fp; | |
2895 | } | |
2896 | ||
1da177e4 LT |
2897 | /* |
2898 | * Called to check deny when READ with all zero stateid or | |
2899 | * WRITE with all zero or all one stateid | |
2900 | */ | |
b37ad28b | 2901 | static __be32 |
1da177e4 LT |
2902 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2903 | { | |
2904 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2905 | struct nfs4_file *fp; | |
dcef0413 | 2906 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2907 | __be32 ret; |
1da177e4 | 2908 | |
1da177e4 | 2909 | fp = find_file(ino); |
13cd2184 N |
2910 | if (!fp) |
2911 | return nfs_ok; | |
b700949b | 2912 | ret = nfserr_locked; |
1da177e4 | 2913 | /* Search for conflicting share reservations */ |
13cd2184 | 2914 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2915 | if (test_deny(deny_type, stp) || |
2916 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2917 | goto out; |
1da177e4 | 2918 | } |
13cd2184 N |
2919 | ret = nfs_ok; |
2920 | out: | |
2921 | put_nfs4_file(fp); | |
2922 | return ret; | |
1da177e4 LT |
2923 | } |
2924 | ||
6b57d9c8 | 2925 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2926 | { |
e8c69d17 BF |
2927 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
2928 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2929 | ||
cdc97505 | 2930 | lockdep_assert_held(&state_lock); |
1da177e4 LT |
2931 | /* We're assuming the state code never drops its reference |
2932 | * without first removing the lease. Since we're in this lease | |
2933 | * callback (and since the lease code is serialized by the kernel | |
2934 | * lock) we know the server hasn't removed the lease yet, we know | |
2935 | * it's safe to take a reference: */ | |
2936 | atomic_inc(&dp->dl_count); | |
2937 | ||
e8c69d17 | 2938 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
1da177e4 | 2939 | |
1c8c601a | 2940 | /* Only place dl_time is set; protected by i_lock: */ |
1da177e4 LT |
2941 | dp->dl_time = get_seconds(); |
2942 | ||
6282cd56 N |
2943 | block_delegations(&dp->dl_fh); |
2944 | ||
6b57d9c8 BF |
2945 | nfsd4_cb_recall(dp); |
2946 | } | |
2947 | ||
1c8c601a | 2948 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
2949 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2950 | { | |
acfdf5c3 BF |
2951 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2952 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2953 | |
7fa10cd1 BF |
2954 | if (!fp) { |
2955 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2956 | return; | |
2957 | } | |
2958 | if (fp->fi_had_conflict) { | |
2959 | WARN(1, "duplicate break on %p\n", fp); | |
2960 | return; | |
2961 | } | |
0272e1fd BF |
2962 | /* |
2963 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2964 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2965 | * in time: |
0272e1fd BF |
2966 | */ |
2967 | fl->fl_break_time = 0; | |
1da177e4 | 2968 | |
cdc97505 | 2969 | spin_lock(&state_lock); |
acfdf5c3 BF |
2970 | fp->fi_had_conflict = true; |
2971 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2972 | nfsd_break_one_deleg(dp); | |
cdc97505 | 2973 | spin_unlock(&state_lock); |
1da177e4 LT |
2974 | } |
2975 | ||
1da177e4 LT |
2976 | static |
2977 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2978 | { | |
2979 | if (arg & F_UNLCK) | |
2980 | return lease_modify(onlist, arg); | |
2981 | else | |
2982 | return -EAGAIN; | |
2983 | } | |
2984 | ||
7b021967 | 2985 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2986 | .lm_break = nfsd_break_deleg_cb, |
2987 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2988 | }; |
2989 | ||
7a8711c9 BF |
2990 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2991 | { | |
2992 | if (nfsd4_has_session(cstate)) | |
2993 | return nfs_ok; | |
2994 | if (seqid == so->so_seqid - 1) | |
2995 | return nfserr_replay_me; | |
2996 | if (seqid == so->so_seqid) | |
2997 | return nfs_ok; | |
2998 | return nfserr_bad_seqid; | |
2999 | } | |
1da177e4 | 3000 | |
4b24ca7d JL |
3001 | static __be32 lookup_clientid(clientid_t *clid, |
3002 | struct nfsd4_compound_state *cstate, | |
3003 | struct nfsd_net *nn) | |
3004 | { | |
3005 | struct nfs4_client *found; | |
3006 | ||
3007 | if (cstate->clp) { | |
3008 | found = cstate->clp; | |
3009 | if (!same_clid(&found->cl_clientid, clid)) | |
3010 | return nfserr_stale_clientid; | |
3011 | return nfs_ok; | |
3012 | } | |
3013 | ||
3014 | if (STALE_CLIENTID(clid, nn)) | |
3015 | return nfserr_stale_clientid; | |
3016 | ||
3017 | /* | |
3018 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3019 | * cached already then we know this is for is for v4.0 and "sessions" | |
3020 | * will be false. | |
3021 | */ | |
3022 | WARN_ON_ONCE(cstate->session); | |
3023 | found = find_confirmed_client(clid, false, nn); | |
3024 | if (!found) | |
3025 | return nfserr_expired; | |
3026 | ||
3027 | /* Cache the nfs4_client in cstate! */ | |
3028 | cstate->clp = found; | |
3029 | atomic_inc(&found->cl_refcount); | |
3030 | return nfs_ok; | |
3031 | } | |
3032 | ||
b37ad28b | 3033 | __be32 |
6668958f | 3034 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3035 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3036 | { |
1da177e4 LT |
3037 | clientid_t *clientid = &open->op_clientid; |
3038 | struct nfs4_client *clp = NULL; | |
3039 | unsigned int strhashval; | |
fe0750e5 | 3040 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3041 | __be32 status; |
1da177e4 | 3042 | |
2c142baa | 3043 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3044 | return nfserr_stale_clientid; |
32513b40 BF |
3045 | /* |
3046 | * In case we need it later, after we've already created the | |
3047 | * file and don't want to risk a further failure: | |
3048 | */ | |
3049 | open->op_file = nfsd4_alloc_file(); | |
3050 | if (open->op_file == NULL) | |
3051 | return nfserr_jukebox; | |
1da177e4 | 3052 | |
16bfdaaf | 3053 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 3054 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
3055 | open->op_openowner = oo; |
3056 | if (!oo) { | |
8daae4dc SK |
3057 | clp = find_confirmed_client(clientid, cstate->minorversion, |
3058 | nn); | |
1da177e4 | 3059 | if (clp == NULL) |
0f442aa2 | 3060 | return nfserr_expired; |
bcf130f9 | 3061 | goto new_owner; |
1da177e4 | 3062 | } |
dad1c067 | 3063 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3064 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3065 | clp = oo->oo_owner.so_client; |
3066 | release_openowner(oo); | |
3067 | open->op_openowner = NULL; | |
bcf130f9 | 3068 | goto new_owner; |
0f442aa2 | 3069 | } |
4cdc951b BF |
3070 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3071 | if (status) | |
3072 | return status; | |
3073 | clp = oo->oo_owner.so_client; | |
3074 | goto alloc_stateid; | |
bcf130f9 | 3075 | new_owner: |
db24b3b4 | 3076 | oo = alloc_init_open_stateowner(strhashval, clp, open, cstate); |
bcf130f9 BF |
3077 | if (oo == NULL) |
3078 | return nfserr_jukebox; | |
3079 | open->op_openowner = oo; | |
4cdc951b BF |
3080 | alloc_stateid: |
3081 | open->op_stp = nfs4_alloc_stateid(clp); | |
3082 | if (!open->op_stp) | |
3083 | return nfserr_jukebox; | |
0f442aa2 | 3084 | return nfs_ok; |
1da177e4 LT |
3085 | } |
3086 | ||
b37ad28b | 3087 | static inline __be32 |
4a6e43e6 N |
3088 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3089 | { | |
3090 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3091 | return nfserr_openmode; | |
3092 | else | |
3093 | return nfs_ok; | |
3094 | } | |
3095 | ||
f459e453 | 3096 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3097 | { |
f459e453 | 3098 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3099 | } |
3100 | ||
38c2f4b1 | 3101 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3102 | { |
f459e453 | 3103 | struct nfs4_stid *ret; |
24a0111e | 3104 | |
38c2f4b1 | 3105 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3106 | if (!ret) |
3107 | return NULL; | |
3108 | return delegstateid(ret); | |
24a0111e BF |
3109 | } |
3110 | ||
8b289b2c BF |
3111 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3112 | { | |
3113 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3114 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3115 | } | |
3116 | ||
b37ad28b | 3117 | static __be32 |
41d22663 | 3118 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3119 | struct nfs4_delegation **dp) |
3120 | { | |
3121 | int flags; | |
b37ad28b | 3122 | __be32 status = nfserr_bad_stateid; |
567d9829 | 3123 | |
38c2f4b1 | 3124 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 3125 | if (*dp == NULL) |
c44c5eeb | 3126 | goto out; |
24a0111e | 3127 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
3128 | status = nfs4_check_delegmode(*dp, flags); |
3129 | if (status) | |
3130 | *dp = NULL; | |
c44c5eeb | 3131 | out: |
8b289b2c | 3132 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3133 | return nfs_ok; |
3134 | if (status) | |
3135 | return status; | |
dad1c067 | 3136 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3137 | return nfs_ok; |
567d9829 N |
3138 | } |
3139 | ||
b37ad28b | 3140 | static __be32 |
dcef0413 | 3141 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 3142 | { |
dcef0413 | 3143 | struct nfs4_ol_stateid *local; |
fe0750e5 | 3144 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3145 | |
8beefa24 | 3146 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3147 | /* ignore lock owners */ |
3148 | if (local->st_stateowner->so_is_open_owner == 0) | |
3149 | continue; | |
3150 | /* remember if we have seen this open owner */ | |
fe0750e5 | 3151 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
3152 | *stpp = local; |
3153 | /* check for conflicting share reservations */ | |
3154 | if (!test_share(local, open)) | |
77eaae8d | 3155 | return nfserr_share_denied; |
1da177e4 | 3156 | } |
77eaae8d | 3157 | return nfs_ok; |
1da177e4 LT |
3158 | } |
3159 | ||
21fb4016 BF |
3160 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3161 | { | |
3162 | int flags = 0; | |
3163 | ||
3164 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3165 | flags |= NFSD_MAY_READ; | |
3166 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3167 | flags |= NFSD_MAY_WRITE; | |
3168 | return flags; | |
3169 | } | |
3170 | ||
7e6a72e5 CH |
3171 | static inline __be32 |
3172 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3173 | struct nfsd4_open *open) | |
3174 | { | |
3175 | struct iattr iattr = { | |
3176 | .ia_valid = ATTR_SIZE, | |
3177 | .ia_size = 0, | |
3178 | }; | |
3179 | if (!open->op_truncate) | |
3180 | return 0; | |
3181 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3182 | return nfserr_inval; | |
3183 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3184 | } | |
3185 | ||
0c12eaff CB |
3186 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
3187 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
3188 | { |
3189 | __be32 status; | |
0c12eaff CB |
3190 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3191 | int access = nfs4_access_to_access(open->op_share_access); | |
3192 | ||
f9d7562f BF |
3193 | if (!fp->fi_fds[oflag]) { |
3194 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
3195 | &fp->fi_fds[oflag]); | |
f9d7562f | 3196 | if (status) |
7e6a72e5 | 3197 | goto out; |
f9d7562f BF |
3198 | } |
3199 | nfs4_file_get_access(fp, oflag); | |
3200 | ||
7e6a72e5 CH |
3201 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3202 | if (status) | |
3203 | goto out_put_access; | |
3204 | ||
f9d7562f | 3205 | return nfs_ok; |
f9d7562f | 3206 | |
7e6a72e5 CH |
3207 | out_put_access: |
3208 | nfs4_file_put_access(fp, oflag); | |
3209 | out: | |
3210 | return status; | |
1da177e4 LT |
3211 | } |
3212 | ||
b37ad28b | 3213 | static __be32 |
dcef0413 | 3214 | 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 | 3215 | { |
b6d2f1ca | 3216 | u32 op_share_access = open->op_share_access; |
b37ad28b | 3217 | __be32 status; |
1da177e4 | 3218 | |
7e6a72e5 | 3219 | if (!test_access(op_share_access, stp)) |
0c12eaff | 3220 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
7e6a72e5 CH |
3221 | else |
3222 | status = nfsd4_truncate(rqstp, cur_fh, open); | |
3223 | ||
3224 | if (status) | |
1da177e4 | 3225 | return status; |
7e6a72e5 | 3226 | |
1da177e4 | 3227 | /* remember the open */ |
82c5ff1b | 3228 | set_access(op_share_access, stp); |
ce0fc43c | 3229 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
3230 | return nfs_ok; |
3231 | } | |
3232 | ||
3233 | ||
1da177e4 | 3234 | static void |
1255a8f3 | 3235 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3236 | { |
dad1c067 | 3237 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3238 | } |
3239 | ||
14a24e99 BF |
3240 | /* Should we give out recallable state?: */ |
3241 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3242 | { | |
3243 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3244 | return true; | |
3245 | /* | |
3246 | * In the sessions case, since we don't have to establish a | |
3247 | * separate connection for callbacks, we assume it's OK | |
3248 | * until we hear otherwise: | |
3249 | */ | |
3250 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3251 | } | |
3252 | ||
22d38c4c BF |
3253 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
3254 | { | |
3255 | struct file_lock *fl; | |
3256 | ||
3257 | fl = locks_alloc_lock(); | |
3258 | if (!fl) | |
3259 | return NULL; | |
3260 | locks_init_lock(fl); | |
3261 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3262 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3263 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3264 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 3265 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 3266 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3267 | return fl; |
3268 | } | |
3269 | ||
99c41515 | 3270 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3271 | { |
acfdf5c3 | 3272 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
3273 | struct file_lock *fl; |
3274 | int status; | |
3275 | ||
99c41515 | 3276 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3277 | if (!fl) |
3278 | return -ENOMEM; | |
acfdf5c3 | 3279 | fl->fl_file = find_readable_file(fp); |
acfdf5c3 | 3280 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
e873088f BF |
3281 | if (status) |
3282 | goto out_free; | |
acfdf5c3 | 3283 | fp->fi_lease = fl; |
cb0942b8 | 3284 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 | 3285 | atomic_set(&fp->fi_delegees, 1); |
cdc97505 | 3286 | spin_lock(&state_lock); |
931ee56c | 3287 | hash_delegation_locked(dp, fp); |
cdc97505 | 3288 | spin_unlock(&state_lock); |
acfdf5c3 | 3289 | return 0; |
e873088f BF |
3290 | out_free: |
3291 | locks_free_lock(fl); | |
3292 | return status; | |
acfdf5c3 BF |
3293 | } |
3294 | ||
bf7bd3e9 | 3295 | static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp) |
acfdf5c3 | 3296 | { |
bf7bd3e9 BF |
3297 | if (fp->fi_had_conflict) |
3298 | return -EAGAIN; | |
3299 | get_nfs4_file(fp); | |
3300 | dp->dl_file = fp; | |
cbf7a75b BF |
3301 | if (!fp->fi_lease) |
3302 | return nfs4_setlease(dp); | |
cdc97505 | 3303 | spin_lock(&state_lock); |
cbf7a75b | 3304 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3305 | if (fp->fi_had_conflict) { |
cdc97505 | 3306 | spin_unlock(&state_lock); |
cbf7a75b | 3307 | return -EAGAIN; |
acfdf5c3 | 3308 | } |
931ee56c | 3309 | hash_delegation_locked(dp, fp); |
cdc97505 | 3310 | spin_unlock(&state_lock); |
edab9782 BF |
3311 | return 0; |
3312 | } | |
3313 | ||
4aa8913c BH |
3314 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3315 | { | |
3316 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3317 | if (status == -EAGAIN) | |
3318 | open->op_why_no_deleg = WND4_CONTENTION; | |
3319 | else { | |
3320 | open->op_why_no_deleg = WND4_RESOURCE; | |
3321 | switch (open->op_deleg_want) { | |
3322 | case NFS4_SHARE_WANT_READ_DELEG: | |
3323 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3324 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3325 | break; | |
3326 | case NFS4_SHARE_WANT_CANCEL: | |
3327 | open->op_why_no_deleg = WND4_CANCELLED; | |
3328 | break; | |
3329 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3330 | WARN_ON_ONCE(1); |
4aa8913c BH |
3331 | } |
3332 | } | |
3333 | } | |
3334 | ||
1da177e4 LT |
3335 | /* |
3336 | * Attempt to hand out a delegation. | |
99c41515 BF |
3337 | * |
3338 | * Note we don't support write delegations, and won't until the vfs has | |
3339 | * proper support for them. | |
1da177e4 LT |
3340 | */ |
3341 | static void | |
5ccb0066 SK |
3342 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
3343 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3344 | { |
3345 | struct nfs4_delegation *dp; | |
fe0750e5 | 3346 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 3347 | int cb_up; |
99c41515 | 3348 | int status = 0; |
1da177e4 | 3349 | |
fe0750e5 | 3350 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3351 | open->op_recall = 0; |
3352 | switch (open->op_claim_type) { | |
3353 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3354 | if (!cb_up) |
7b190fec | 3355 | open->op_recall = 1; |
99c41515 BF |
3356 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3357 | goto out_no_deleg; | |
7b190fec N |
3358 | break; |
3359 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3360 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3361 | /* |
3362 | * Let's not give out any delegations till everyone's | |
3363 | * had the chance to reclaim theirs.... | |
3364 | */ | |
5ccb0066 | 3365 | if (locks_in_grace(net)) |
99c41515 | 3366 | goto out_no_deleg; |
dad1c067 | 3367 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3368 | goto out_no_deleg; |
9a0590ae SD |
3369 | /* |
3370 | * Also, if the file was opened for write or | |
3371 | * create, there's a good chance the client's | |
3372 | * about to write to it, resulting in an | |
3373 | * immediate recall (since we don't support | |
3374 | * write delegations): | |
3375 | */ | |
7b190fec | 3376 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3377 | goto out_no_deleg; |
3378 | if (open->op_create == NFS4_OPEN_CREATE) | |
3379 | goto out_no_deleg; | |
7b190fec N |
3380 | break; |
3381 | default: | |
99c41515 | 3382 | goto out_no_deleg; |
7b190fec | 3383 | } |
99c41515 | 3384 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh); |
dd239cc0 BF |
3385 | if (dp == NULL) |
3386 | goto out_no_deleg; | |
bf7bd3e9 | 3387 | status = nfs4_set_delegation(dp, stp->st_file); |
edab9782 | 3388 | if (status) |
dd239cc0 | 3389 | goto out_free; |
1da177e4 | 3390 | |
d5477a8d | 3391 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3392 | |
8c10cbdb | 3393 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3394 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3395 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
dd239cc0 BF |
3396 | return; |
3397 | out_free: | |
cbf7a75b | 3398 | destroy_delegation(dp); |
dd239cc0 | 3399 | out_no_deleg: |
99c41515 BF |
3400 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3401 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3402 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3403 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3404 | open->op_recall = 1; |
3405 | } | |
99c41515 BF |
3406 | |
3407 | /* 4.1 client asking for a delegation? */ | |
3408 | if (open->op_deleg_want) | |
3409 | nfsd4_open_deleg_none_ext(open, status); | |
3410 | return; | |
1da177e4 LT |
3411 | } |
3412 | ||
e27f49c3 BH |
3413 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3414 | struct nfs4_delegation *dp) | |
3415 | { | |
3416 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3417 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3418 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3419 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3420 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3421 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3422 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3423 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3424 | } | |
3425 | /* Otherwise the client must be confused wanting a delegation | |
3426 | * it already has, therefore we don't return | |
3427 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3428 | */ | |
3429 | } | |
3430 | ||
1da177e4 LT |
3431 | /* |
3432 | * called with nfs4_lock_state() held. | |
3433 | */ | |
b37ad28b | 3434 | __be32 |
1da177e4 LT |
3435 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3436 | { | |
6668958f | 3437 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3438 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3439 | struct nfs4_file *fp = NULL; |
3440 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3441 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3442 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3443 | __be32 status; |
1da177e4 | 3444 | |
1da177e4 LT |
3445 | /* |
3446 | * Lookup file; if found, lookup stateid and check open request, | |
3447 | * and check for delegations in the process of being recalled. | |
3448 | * If not found, create the nfs4_file struct | |
3449 | */ | |
950e0118 TM |
3450 | fp = find_or_add_file(ino, open->op_file); |
3451 | if (fp != open->op_file) { | |
1da177e4 LT |
3452 | if ((status = nfs4_check_open(fp, open, &stp))) |
3453 | goto out; | |
41d22663 | 3454 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3455 | if (status) |
3456 | goto out; | |
1da177e4 | 3457 | } else { |
950e0118 | 3458 | open->op_file = NULL; |
c44c5eeb | 3459 | status = nfserr_bad_stateid; |
8b289b2c | 3460 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3461 | goto out; |
3e772463 | 3462 | status = nfserr_jukebox; |
1da177e4 LT |
3463 | } |
3464 | ||
3465 | /* | |
3466 | * OPEN the file, or upgrade an existing OPEN. | |
3467 | * If truncate fails, the OPEN fails. | |
3468 | */ | |
3469 | if (stp) { | |
3470 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3471 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3472 | if (status) |
3473 | goto out; | |
3474 | } else { | |
4cdc951b | 3475 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 3476 | if (status) |
1da177e4 | 3477 | goto out; |
4cdc951b BF |
3478 | stp = open->op_stp; |
3479 | open->op_stp = NULL; | |
996e0938 | 3480 | init_open_stateid(stp, fp, open); |
1da177e4 | 3481 | } |
dcef0413 BF |
3482 | update_stateid(&stp->st_stid.sc_stateid); |
3483 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3484 | |
d24433cd | 3485 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
3486 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3487 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3488 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3489 | goto nodeleg; | |
3490 | } | |
3491 | } | |
3492 | ||
1da177e4 LT |
3493 | /* |
3494 | * Attempt to hand out a delegation. No error return, because the | |
3495 | * OPEN succeeds even if we fail. | |
3496 | */ | |
5ccb0066 | 3497 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3498 | nodeleg: |
1da177e4 LT |
3499 | status = nfs_ok; |
3500 | ||
8c10cbdb | 3501 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3502 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3503 | out: |
d24433cd BH |
3504 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3505 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3506 | open->op_deleg_want) |
3507 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3508 | |
13cd2184 N |
3509 | if (fp) |
3510 | put_nfs4_file(fp); | |
37515177 | 3511 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3512 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3513 | /* |
3514 | * To finish the open response, we just need to set the rflags. | |
3515 | */ | |
3516 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3517 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3518 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3519 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3520 | ||
3521 | return status; | |
3522 | } | |
3523 | ||
d29b20cd BF |
3524 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3525 | { | |
3526 | if (open->op_openowner) { | |
3527 | struct nfs4_openowner *oo = open->op_openowner; | |
3528 | ||
3529 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3530 | list_del_init(&oo->oo_close_lru); | |
3531 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3532 | if (status) { | |
3533 | release_openowner(oo); | |
3534 | open->op_openowner = NULL; | |
3535 | } else | |
3536 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3537 | } | |
3538 | } | |
32513b40 BF |
3539 | if (open->op_file) |
3540 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3541 | if (open->op_stp) |
ef79859e | 3542 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3543 | } |
3544 | ||
b37ad28b | 3545 | __be32 |
b591480b BF |
3546 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3547 | clientid_t *clid) | |
1da177e4 LT |
3548 | { |
3549 | struct nfs4_client *clp; | |
b37ad28b | 3550 | __be32 status; |
7f2210fa | 3551 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3552 | |
3553 | nfs4_lock_state(); | |
3554 | dprintk("process_renew(%08x/%08x): starting\n", | |
3555 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 3556 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 3557 | if (status) |
1da177e4 | 3558 | goto out; |
4b24ca7d | 3559 | clp = cstate->clp; |
1da177e4 | 3560 | status = nfserr_cb_path_down; |
ea1da636 | 3561 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3562 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3563 | goto out; |
3564 | status = nfs_ok; | |
3565 | out: | |
3566 | nfs4_unlock_state(); | |
3567 | return status; | |
3568 | } | |
3569 | ||
a76b4319 | 3570 | static void |
12760c66 | 3571 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3572 | { |
33dcc481 | 3573 | /* do nothing if grace period already ended */ |
a51c84ed | 3574 | if (nn->grace_ended) |
33dcc481 JL |
3575 | return; |
3576 | ||
a76b4319 | 3577 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3578 | nn->grace_ended = true; |
12760c66 | 3579 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3580 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3581 | /* |
3582 | * Now that every NFSv4 client has had the chance to recover and | |
3583 | * to see the (possibly new, possibly shorter) lease time, we | |
3584 | * can safely set the next grace time to the current lease time: | |
3585 | */ | |
5284b44e | 3586 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3587 | } |
3588 | ||
fd39ca9a | 3589 | static time_t |
09121281 | 3590 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3591 | { |
3592 | struct nfs4_client *clp; | |
fe0750e5 | 3593 | struct nfs4_openowner *oo; |
1da177e4 LT |
3594 | struct nfs4_delegation *dp; |
3595 | struct list_head *pos, *next, reaplist; | |
3d733711 | 3596 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 3597 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
3598 | |
3599 | nfs4_lock_state(); | |
3600 | ||
3601 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3602 | nfsd4_end_grace(nn); |
36acb66b | 3603 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3604 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3605 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3606 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3607 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3608 | t = clp->cl_time - cutoff; | |
a832e7ae | 3609 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
3610 | break; |
3611 | } | |
221a6876 | 3612 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3613 | dprintk("NFSD: client in use (clientid %08x)\n", |
3614 | clp->cl_clientid.cl_id); | |
3615 | continue; | |
3616 | } | |
221a6876 | 3617 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3618 | } |
c9a49628 | 3619 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3620 | list_for_each_safe(pos, next, &reaplist) { |
3621 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3622 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3623 | clp->cl_clientid.cl_id); | |
3624 | expire_client(clp); | |
3625 | } | |
cdc97505 | 3626 | spin_lock(&state_lock); |
e8c69d17 | 3627 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3628 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3629 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3630 | continue; | |
1da177e4 | 3631 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
3632 | t = dp->dl_time - cutoff; |
3633 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3634 | break; |
3635 | } | |
1da177e4 LT |
3636 | list_move(&dp->dl_recall_lru, &reaplist); |
3637 | } | |
cdc97505 | 3638 | spin_unlock(&state_lock); |
1da177e4 LT |
3639 | list_for_each_safe(pos, next, &reaplist) { |
3640 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 3641 | revoke_delegation(dp); |
1da177e4 | 3642 | } |
73758fed | 3643 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3644 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3645 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
3646 | t = oo->oo_time - cutoff; |
3647 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3648 | break; |
3649 | } | |
fe0750e5 | 3650 | release_openowner(oo); |
1da177e4 | 3651 | } |
a832e7ae | 3652 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 3653 | nfs4_unlock_state(); |
a832e7ae | 3654 | return new_timeo; |
1da177e4 LT |
3655 | } |
3656 | ||
a254b246 HH |
3657 | static struct workqueue_struct *laundry_wq; |
3658 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3659 | |
3660 | static void | |
09121281 | 3661 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3662 | { |
3663 | time_t t; | |
09121281 SK |
3664 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3665 | work); | |
3666 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3667 | laundromat_work); | |
1da177e4 | 3668 | |
09121281 | 3669 | t = nfs4_laundromat(nn); |
1da177e4 | 3670 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3671 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3672 | } |
3673 | ||
f7a4d872 | 3674 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3675 | { |
f7a4d872 BF |
3676 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3677 | return nfserr_bad_stateid; | |
3678 | return nfs_ok; | |
1da177e4 LT |
3679 | } |
3680 | ||
1da177e4 | 3681 | static inline int |
82c5ff1b | 3682 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3683 | { |
82c5ff1b JL |
3684 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3685 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3686 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3687 | } |
3688 | ||
3689 | static inline int | |
82c5ff1b | 3690 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3691 | { |
82c5ff1b JL |
3692 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3693 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3694 | } |
3695 | ||
3696 | static | |
dcef0413 | 3697 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3698 | { |
b37ad28b | 3699 | __be32 status = nfserr_openmode; |
1da177e4 | 3700 | |
02921914 BF |
3701 | /* For lock stateid's, we test the parent open, not the lock: */ |
3702 | if (stp->st_openstp) | |
3703 | stp = stp->st_openstp; | |
82c5ff1b | 3704 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3705 | goto out; |
82c5ff1b | 3706 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3707 | goto out; |
3708 | status = nfs_ok; | |
3709 | out: | |
3710 | return status; | |
3711 | } | |
3712 | ||
b37ad28b | 3713 | static inline __be32 |
5ccb0066 | 3714 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3715 | { |
203a8c8e | 3716 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3717 | return nfs_ok; |
5ccb0066 | 3718 | else if (locks_in_grace(net)) { |
25985edc | 3719 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3720 | * conflicting state; so we must wait out the grace period. */ |
3721 | return nfserr_grace; | |
3722 | } else if (flags & WR_STATE) | |
3723 | return nfs4_share_conflict(current_fh, | |
3724 | NFS4_SHARE_DENY_WRITE); | |
3725 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3726 | return nfs4_share_conflict(current_fh, | |
3727 | NFS4_SHARE_DENY_READ); | |
3728 | } | |
3729 | ||
3730 | /* | |
3731 | * Allow READ/WRITE during grace period on recovered state only for files | |
3732 | * that are not able to provide mandatory locking. | |
3733 | */ | |
3734 | static inline int | |
5ccb0066 | 3735 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3736 | { |
5ccb0066 | 3737 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3738 | } |
3739 | ||
81b82965 BF |
3740 | /* Returns true iff a is later than b: */ |
3741 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3742 | { | |
1a9357f4 | 3743 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
3744 | } |
3745 | ||
57b7b43b | 3746 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3747 | { |
6668958f AA |
3748 | /* |
3749 | * When sessions are used the stateid generation number is ignored | |
3750 | * when it is zero. | |
3751 | */ | |
28dde241 | 3752 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3753 | return nfs_ok; |
3754 | ||
3755 | if (in->si_generation == ref->si_generation) | |
3756 | return nfs_ok; | |
6668958f | 3757 | |
0836f587 | 3758 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3759 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3760 | return nfserr_bad_stateid; |
3761 | /* | |
81b82965 BF |
3762 | * However, we could see a stateid from the past, even from a |
3763 | * non-buggy client. For example, if the client sends a lock | |
3764 | * while some IO is outstanding, the lock may bump si_generation | |
3765 | * while the IO is still in flight. The client could avoid that | |
3766 | * situation by waiting for responses on all the IO requests, | |
3767 | * but better performance may result in retrying IO that | |
3768 | * receives an old_stateid error if requests are rarely | |
3769 | * reordered in flight: | |
0836f587 | 3770 | */ |
81b82965 | 3771 | return nfserr_old_stateid; |
0836f587 BF |
3772 | } |
3773 | ||
7df302f7 | 3774 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3775 | { |
97b7e3b6 BF |
3776 | struct nfs4_stid *s; |
3777 | struct nfs4_ol_stateid *ols; | |
3778 | __be32 status; | |
17456804 | 3779 | |
7df302f7 CL |
3780 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3781 | return nfserr_bad_stateid; | |
3782 | /* Client debugging aid. */ | |
3783 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3784 | char addr_str[INET6_ADDRSTRLEN]; | |
3785 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3786 | sizeof(addr_str)); | |
3787 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3788 | "with incorrect client ID\n", addr_str); | |
3789 | return nfserr_bad_stateid; | |
3790 | } | |
38c2f4b1 | 3791 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3792 | if (!s) |
7df302f7 | 3793 | return nfserr_bad_stateid; |
36279ac1 | 3794 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3795 | if (status) |
97b7e3b6 | 3796 | return status; |
23340032 BF |
3797 | switch (s->sc_type) { |
3798 | case NFS4_DELEG_STID: | |
97b7e3b6 | 3799 | return nfs_ok; |
3bd64a5b BF |
3800 | case NFS4_REVOKED_DELEG_STID: |
3801 | return nfserr_deleg_revoked; | |
23340032 BF |
3802 | case NFS4_OPEN_STID: |
3803 | case NFS4_LOCK_STID: | |
3804 | ols = openlockstateid(s); | |
3805 | if (ols->st_stateowner->so_is_open_owner | |
3806 | && !(openowner(ols->st_stateowner)->oo_flags | |
3807 | & NFS4_OO_CONFIRMED)) | |
3808 | return nfserr_bad_stateid; | |
97b7e3b6 | 3809 | return nfs_ok; |
23340032 BF |
3810 | default: |
3811 | printk("unknown stateid type %x\n", s->sc_type); | |
3812 | case NFS4_CLOSED_STID: | |
97b7e3b6 | 3813 | return nfserr_bad_stateid; |
23340032 | 3814 | } |
17456804 BS |
3815 | } |
3816 | ||
2dd6e458 TM |
3817 | static __be32 |
3818 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
3819 | stateid_t *stateid, unsigned char typemask, | |
3820 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 3821 | { |
0eb6f20a | 3822 | __be32 status; |
38c2f4b1 BF |
3823 | |
3824 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3825 | return nfserr_bad_stateid; | |
4b24ca7d | 3826 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 3827 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 3828 | if (cstate->session) |
a8a7c677 | 3829 | return nfserr_bad_stateid; |
38c2f4b1 | 3830 | return nfserr_stale_stateid; |
a8a7c677 | 3831 | } |
0eb6f20a BF |
3832 | if (status) |
3833 | return status; | |
4b24ca7d | 3834 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
3835 | if (!*s) |
3836 | return nfserr_bad_stateid; | |
3837 | return nfs_ok; | |
38c2f4b1 BF |
3838 | } |
3839 | ||
1da177e4 LT |
3840 | /* |
3841 | * Checks for stateid operations | |
3842 | */ | |
b37ad28b | 3843 | __be32 |
5ccb0066 | 3844 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3845 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3846 | { |
69064a27 | 3847 | struct nfs4_stid *s; |
dcef0413 | 3848 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3849 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3850 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3851 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3852 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 3853 | struct file *file = NULL; |
b37ad28b | 3854 | __be32 status; |
1da177e4 | 3855 | |
1da177e4 LT |
3856 | if (filpp) |
3857 | *filpp = NULL; | |
3858 | ||
5ccb0066 | 3859 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3860 | return nfserr_grace; |
3861 | ||
3862 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3863 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3864 | |
14bcab1a TM |
3865 | nfs4_lock_state(); |
3866 | ||
2dd6e458 | 3867 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 3868 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 3869 | &s, nn); |
38c2f4b1 | 3870 | if (status) |
14bcab1a | 3871 | goto out; |
69064a27 BF |
3872 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3873 | if (status) | |
3874 | goto out; | |
f7a4d872 BF |
3875 | switch (s->sc_type) { |
3876 | case NFS4_DELEG_STID: | |
69064a27 | 3877 | dp = delegstateid(s); |
dc9bf700 BF |
3878 | status = nfs4_check_delegmode(dp, flags); |
3879 | if (status) | |
3880 | goto out; | |
43b0178e | 3881 | if (filpp) { |
14bcab1a TM |
3882 | file = dp->dl_file->fi_deleg_file; |
3883 | if (!file) { | |
063b0fb9 BF |
3884 | WARN_ON_ONCE(1); |
3885 | status = nfserr_serverfault; | |
3886 | goto out; | |
3887 | } | |
43b0178e | 3888 | } |
f7a4d872 BF |
3889 | break; |
3890 | case NFS4_OPEN_STID: | |
3891 | case NFS4_LOCK_STID: | |
69064a27 | 3892 | stp = openlockstateid(s); |
f7a4d872 BF |
3893 | status = nfs4_check_fh(current_fh, stp); |
3894 | if (status) | |
1da177e4 | 3895 | goto out; |
fe0750e5 | 3896 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3897 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3898 | goto out; |
a4455be0 BF |
3899 | status = nfs4_check_openmode(stp, flags); |
3900 | if (status) | |
1da177e4 | 3901 | goto out; |
f9d7562f BF |
3902 | if (filpp) { |
3903 | if (flags & RD_STATE) | |
14bcab1a | 3904 | file = find_readable_file(stp->st_file); |
f9d7562f | 3905 | else |
14bcab1a | 3906 | file = find_writeable_file(stp->st_file); |
f9d7562f | 3907 | } |
f7a4d872 BF |
3908 | break; |
3909 | default: | |
14bcab1a TM |
3910 | status = nfserr_bad_stateid; |
3911 | goto out; | |
1da177e4 LT |
3912 | } |
3913 | status = nfs_ok; | |
14bcab1a TM |
3914 | if (file) |
3915 | *filpp = get_file(file); | |
1da177e4 | 3916 | out: |
14bcab1a | 3917 | nfs4_unlock_state(); |
1da177e4 LT |
3918 | return status; |
3919 | } | |
3920 | ||
e1ca12df | 3921 | static __be32 |
dcef0413 | 3922 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3923 | { |
a1b8ff4c BF |
3924 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
3925 | ||
3926 | if (check_for_locks(stp->st_file, lo)) | |
e1ca12df | 3927 | return nfserr_locks_held; |
c53530da | 3928 | release_lockowner_if_empty(lo); |
e1ca12df BS |
3929 | return nfs_ok; |
3930 | } | |
3931 | ||
17456804 BS |
3932 | /* |
3933 | * Test if the stateid is valid | |
3934 | */ | |
3935 | __be32 | |
3936 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3937 | struct nfsd4_test_stateid *test_stateid) | |
3938 | { | |
03cfb420 BS |
3939 | struct nfsd4_test_stateid_id *stateid; |
3940 | struct nfs4_client *cl = cstate->session->se_client; | |
3941 | ||
3942 | nfs4_lock_state(); | |
3943 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3944 | stateid->ts_id_status = |
3945 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3946 | nfs4_unlock_state(); |
3947 | ||
17456804 BS |
3948 | return nfs_ok; |
3949 | } | |
3950 | ||
e1ca12df BS |
3951 | __be32 |
3952 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3953 | struct nfsd4_free_stateid *free_stateid) | |
3954 | { | |
3955 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3956 | struct nfs4_stid *s; |
3bd64a5b | 3957 | struct nfs4_delegation *dp; |
38c2f4b1 | 3958 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3959 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3960 | |
3961 | nfs4_lock_state(); | |
38c2f4b1 | 3962 | s = find_stateid(cl, stateid); |
2da1cec7 | 3963 | if (!s) |
81b82965 | 3964 | goto out; |
2da1cec7 BF |
3965 | switch (s->sc_type) { |
3966 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3967 | ret = nfserr_locks_held; |
3968 | goto out; | |
2da1cec7 BF |
3969 | case NFS4_OPEN_STID: |
3970 | case NFS4_LOCK_STID: | |
3971 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3972 | if (ret) | |
3973 | goto out; | |
3974 | if (s->sc_type == NFS4_LOCK_STID) | |
3975 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3976 | else | |
3977 | ret = nfserr_locks_held; | |
f7a4d872 | 3978 | break; |
3bd64a5b BF |
3979 | case NFS4_REVOKED_DELEG_STID: |
3980 | dp = delegstateid(s); | |
3981 | destroy_revoked_delegation(dp); | |
3982 | ret = nfs_ok; | |
3983 | break; | |
f7a4d872 BF |
3984 | default: |
3985 | ret = nfserr_bad_stateid; | |
e1ca12df | 3986 | } |
e1ca12df BS |
3987 | out: |
3988 | nfs4_unlock_state(); | |
3989 | return ret; | |
3990 | } | |
3991 | ||
4c4cd222 N |
3992 | static inline int |
3993 | setlkflg (int type) | |
3994 | { | |
3995 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3996 | RD_STATE : WR_STATE; | |
3997 | } | |
1da177e4 | 3998 | |
dcef0413 | 3999 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4000 | { |
4001 | struct svc_fh *current_fh = &cstate->current_fh; | |
4002 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4003 | __be32 status; | |
4004 | ||
c0a5d93e BF |
4005 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4006 | if (status) | |
4007 | return status; | |
3bd64a5b BF |
4008 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4009 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4010 | /* |
4011 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4012 | * nfserr_replay_me from the previous step, and |
4013 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4014 | */ |
4015 | return nfserr_bad_stateid; | |
4016 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4017 | if (status) | |
4018 | return status; | |
4019 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4020 | } |
4021 | ||
1da177e4 LT |
4022 | /* |
4023 | * Checks for sequence id mutating operations. | |
4024 | */ | |
b37ad28b | 4025 | static __be32 |
dd453dfd | 4026 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4027 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4028 | struct nfs4_ol_stateid **stpp, |
4029 | struct nfsd_net *nn) | |
1da177e4 | 4030 | { |
0836f587 | 4031 | __be32 status; |
38c2f4b1 | 4032 | struct nfs4_stid *s; |
e17f99b7 | 4033 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4034 | |
8c10cbdb BH |
4035 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4036 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4037 | |
1da177e4 | 4038 | *stpp = NULL; |
2dd6e458 | 4039 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4040 | if (status) |
4041 | return status; | |
e17f99b7 | 4042 | stp = openlockstateid(s); |
3d74e6a5 | 4043 | if (!nfsd4_has_session(cstate)) |
e17f99b7 | 4044 | cstate->replay_owner = stp->st_stateowner; |
1da177e4 | 4045 | |
e17f99b7 TM |
4046 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
4047 | if (!status) | |
4048 | *stpp = stp; | |
4049 | return status; | |
c0a5d93e | 4050 | } |
39325bd0 | 4051 | |
3320fef1 SK |
4052 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4053 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4054 | { |
4055 | __be32 status; | |
4056 | struct nfs4_openowner *oo; | |
1da177e4 | 4057 | |
c0a5d93e | 4058 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 4059 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
4060 | if (status) |
4061 | return status; | |
c0a5d93e | 4062 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 4063 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 4064 | return nfserr_bad_stateid; |
3a4f98bb | 4065 | return nfs_ok; |
1da177e4 LT |
4066 | } |
4067 | ||
b37ad28b | 4068 | __be32 |
ca364317 | 4069 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4070 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4071 | { |
b37ad28b | 4072 | __be32 status; |
fe0750e5 | 4073 | struct nfs4_openowner *oo; |
dcef0413 | 4074 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4075 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4076 | |
a6a9f18f AV |
4077 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4078 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4079 | |
ca364317 | 4080 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4081 | if (status) |
4082 | return status; | |
1da177e4 LT |
4083 | |
4084 | nfs4_lock_state(); | |
4085 | ||
9072d5c6 | 4086 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4087 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4088 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4089 | if (status) |
68b66e82 | 4090 | goto out; |
fe0750e5 | 4091 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4092 | status = nfserr_bad_stateid; |
dad1c067 | 4093 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 4094 | goto out; |
dad1c067 | 4095 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4096 | update_stateid(&stp->st_stid.sc_stateid); |
4097 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4098 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4099 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4100 | |
2a4317c5 | 4101 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4102 | status = nfs_ok; |
1da177e4 | 4103 | out: |
9411b1d4 | 4104 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4105 | if (!cstate->replay_owner) |
4106 | nfs4_unlock_state(); | |
1da177e4 LT |
4107 | return status; |
4108 | } | |
4109 | ||
6409a5a6 | 4110 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4111 | { |
82c5ff1b | 4112 | if (!test_access(access, stp)) |
6409a5a6 BF |
4113 | return; |
4114 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 4115 | clear_access(access, stp); |
6409a5a6 | 4116 | } |
f197c271 | 4117 | |
6409a5a6 BF |
4118 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4119 | { | |
4120 | switch (to_access) { | |
4121 | case NFS4_SHARE_ACCESS_READ: | |
4122 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4123 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4124 | break; | |
4125 | case NFS4_SHARE_ACCESS_WRITE: | |
4126 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4127 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4128 | break; | |
4129 | case NFS4_SHARE_ACCESS_BOTH: | |
4130 | break; | |
4131 | default: | |
063b0fb9 | 4132 | WARN_ON_ONCE(1); |
1da177e4 LT |
4133 | } |
4134 | } | |
4135 | ||
4136 | static void | |
ce0fc43c | 4137 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
4138 | { |
4139 | int i; | |
4140 | for (i = 0; i < 4; i++) { | |
4141 | if ((i & deny) != i) | |
ce0fc43c | 4142 | clear_deny(i, stp); |
1da177e4 LT |
4143 | } |
4144 | } | |
4145 | ||
b37ad28b | 4146 | __be32 |
ca364317 BF |
4147 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4148 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4149 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4150 | { |
b37ad28b | 4151 | __be32 status; |
dcef0413 | 4152 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4153 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4154 | |
a6a9f18f AV |
4155 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4156 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4157 | |
c30e92df | 4158 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4159 | if (od->od_deleg_want) |
4160 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4161 | od->od_deleg_want); | |
1da177e4 LT |
4162 | |
4163 | nfs4_lock_state(); | |
c0a5d93e | 4164 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4165 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4166 | if (status) |
1da177e4 | 4167 | goto out; |
1da177e4 | 4168 | status = nfserr_inval; |
82c5ff1b JL |
4169 | if (!test_access(od->od_share_access, stp)) { |
4170 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
4171 | stp->st_access_bmap, od->od_share_access); |
4172 | goto out; | |
4173 | } | |
ce0fc43c | 4174 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
4175 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
4176 | stp->st_deny_bmap, od->od_share_deny); | |
4177 | goto out; | |
4178 | } | |
6409a5a6 | 4179 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4180 | |
ce0fc43c | 4181 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4182 | |
dcef0413 BF |
4183 | update_stateid(&stp->st_stid.sc_stateid); |
4184 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4185 | status = nfs_ok; |
4186 | out: | |
9411b1d4 | 4187 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4188 | if (!cstate->replay_owner) |
4189 | nfs4_unlock_state(); | |
1da177e4 LT |
4190 | return status; |
4191 | } | |
4192 | ||
f7a4d872 BF |
4193 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4194 | { | |
acf9295b TM |
4195 | struct nfs4_client *clp = s->st_stid.sc_client; |
4196 | struct nfs4_openowner *oo = openowner(s->st_stateowner); | |
4197 | ||
f7a4d872 | 4198 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
acf9295b TM |
4199 | unhash_open_stateid(s); |
4200 | ||
4201 | if (clp->cl_minorversion) { | |
4202 | free_generic_stateid(s); | |
4203 | if (list_empty(&oo->oo_owner.so_stateids)) | |
4204 | release_openowner(oo); | |
4205 | } else { | |
4206 | oo->oo_last_closed_stid = s; | |
4207 | /* | |
4208 | * In the 4.0 case we need to keep the owners around a | |
4209 | * little while to handle CLOSE replay. | |
4210 | */ | |
4211 | if (list_empty(&oo->oo_owner.so_stateids)) | |
4212 | move_to_close_lru(oo, clp->net); | |
4213 | } | |
38c387b5 BF |
4214 | } |
4215 | ||
1da177e4 LT |
4216 | /* |
4217 | * nfs4_unlock_state() called after encode | |
4218 | */ | |
b37ad28b | 4219 | __be32 |
ca364317 | 4220 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4221 | struct nfsd4_close *close) |
1da177e4 | 4222 | { |
b37ad28b | 4223 | __be32 status; |
dcef0413 | 4224 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4225 | struct net *net = SVC_NET(rqstp); |
4226 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4227 | |
a6a9f18f AV |
4228 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4229 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4230 | |
4231 | nfs4_lock_state(); | |
f7a4d872 BF |
4232 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4233 | &close->cl_stateid, | |
4234 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4235 | &stp, nn); |
9411b1d4 | 4236 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4237 | if (status) |
1da177e4 | 4238 | goto out; |
dcef0413 BF |
4239 | update_stateid(&stp->st_stid.sc_stateid); |
4240 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4241 | |
f7a4d872 | 4242 | nfsd4_close_open_stateid(stp); |
1da177e4 | 4243 | out: |
5ec094c1 BF |
4244 | if (!cstate->replay_owner) |
4245 | nfs4_unlock_state(); | |
1da177e4 LT |
4246 | return status; |
4247 | } | |
4248 | ||
b37ad28b | 4249 | __be32 |
ca364317 BF |
4250 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4251 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4252 | { |
203a8c8e BF |
4253 | struct nfs4_delegation *dp; |
4254 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4255 | struct nfs4_stid *s; |
b37ad28b | 4256 | __be32 status; |
3320fef1 | 4257 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4258 | |
ca364317 | 4259 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4260 | return status; |
1da177e4 LT |
4261 | |
4262 | nfs4_lock_state(); | |
2dd6e458 | 4263 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4264 | if (status) |
203a8c8e | 4265 | goto out; |
38c2f4b1 | 4266 | dp = delegstateid(s); |
d5477a8d | 4267 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
4268 | if (status) |
4269 | goto out; | |
203a8c8e | 4270 | |
3bd64a5b | 4271 | destroy_delegation(dp); |
1da177e4 | 4272 | out: |
203a8c8e BF |
4273 | nfs4_unlock_state(); |
4274 | ||
1da177e4 LT |
4275 | return status; |
4276 | } | |
4277 | ||
4278 | ||
1da177e4 | 4279 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4280 | |
87df4de8 BH |
4281 | static inline u64 |
4282 | end_offset(u64 start, u64 len) | |
4283 | { | |
4284 | u64 end; | |
4285 | ||
4286 | end = start + len; | |
4287 | return end >= start ? end: NFS4_MAX_UINT64; | |
4288 | } | |
4289 | ||
4290 | /* last octet in a range */ | |
4291 | static inline u64 | |
4292 | last_byte_offset(u64 start, u64 len) | |
4293 | { | |
4294 | u64 end; | |
4295 | ||
063b0fb9 | 4296 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4297 | end = start + len; |
4298 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4299 | } | |
4300 | ||
1da177e4 LT |
4301 | /* |
4302 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4303 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4304 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4305 | * locking, this prevents us from being completely protocol-compliant. The | |
4306 | * real solution to this problem is to start using unsigned file offsets in | |
4307 | * the VFS, but this is a very deep change! | |
4308 | */ | |
4309 | static inline void | |
4310 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4311 | { | |
4312 | if (lock->fl_start < 0) | |
4313 | lock->fl_start = OFFSET_MAX; | |
4314 | if (lock->fl_end < 0) | |
4315 | lock->fl_end = OFFSET_MAX; | |
4316 | } | |
4317 | ||
d5b9026a N |
4318 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4319 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4320 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4321 | }; |
1da177e4 LT |
4322 | |
4323 | static inline void | |
4324 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4325 | { | |
fe0750e5 | 4326 | struct nfs4_lockowner *lo; |
1da177e4 | 4327 | |
d5b9026a | 4328 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4329 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4330 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4331 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4332 | if (!deny->ld_owner.data) |
4333 | /* We just don't care that much */ | |
4334 | goto nevermind; | |
fe0750e5 BF |
4335 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4336 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4337 | } else { |
7c13f344 BF |
4338 | nevermind: |
4339 | deny->ld_owner.len = 0; | |
4340 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4341 | deny->ld_clientid.cl_boot = 0; |
4342 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4343 | } |
4344 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4345 | deny->ld_length = NFS4_MAX_UINT64; |
4346 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4347 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4348 | deny->ld_type = NFS4_READ_LT; | |
4349 | if (fl->fl_type != F_RDLCK) | |
4350 | deny->ld_type = NFS4_WRITE_LT; | |
4351 | } | |
4352 | ||
fe0750e5 | 4353 | static struct nfs4_lockowner * |
b3c32bcd TM |
4354 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, |
4355 | struct nfsd_net *nn) | |
1da177e4 | 4356 | { |
b3c32bcd TM |
4357 | unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner); |
4358 | struct nfs4_stateowner *so; | |
1da177e4 | 4359 | |
b3c32bcd TM |
4360 | list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) { |
4361 | if (so->so_is_open_owner) | |
4362 | continue; | |
4363 | if (!same_owner_str(so, owner, clid)) | |
4364 | continue; | |
4365 | return lockowner(so); | |
1da177e4 LT |
4366 | } |
4367 | return NULL; | |
4368 | } | |
4369 | ||
4370 | /* | |
4371 | * Alloc a lock owner structure. | |
4372 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4373 | * occurred. |
1da177e4 | 4374 | * |
16bfdaaf | 4375 | * strhashval = ownerstr_hashval |
1da177e4 | 4376 | */ |
fe0750e5 | 4377 | static struct nfs4_lockowner * |
dcef0413 | 4378 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4379 | struct nfs4_lockowner *lo; |
b3c32bcd | 4380 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 4381 | |
fe0750e5 BF |
4382 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4383 | if (!lo) | |
1da177e4 | 4384 | return NULL; |
fe0750e5 BF |
4385 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4386 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4387 | /* It is the openowner seqid that will be incremented in encode in the |
4388 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 | 4389 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
b3c32bcd | 4390 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
fe0750e5 | 4391 | return lo; |
1da177e4 LT |
4392 | } |
4393 | ||
dcef0413 BF |
4394 | static struct nfs4_ol_stateid * |
4395 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4396 | { |
dcef0413 | 4397 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4398 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4399 | |
996e0938 | 4400 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4401 | if (stp == NULL) |
6136d2b4 | 4402 | return NULL; |
3abdb607 | 4403 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4404 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4405 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4406 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4407 | get_nfs4_file(fp); |
1da177e4 | 4408 | stp->st_file = fp; |
0997b173 | 4409 | stp->st_access_bmap = 0; |
1da177e4 | 4410 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4411 | stp->st_openstp = open_stp; |
3c87b9b7 | 4412 | list_add(&stp->st_locks, &open_stp->st_locks); |
1da177e4 LT |
4413 | return stp; |
4414 | } | |
4415 | ||
c53530da JL |
4416 | static struct nfs4_ol_stateid * |
4417 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
4418 | { | |
4419 | struct nfs4_ol_stateid *lst; | |
4420 | ||
4421 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
4422 | if (lst->st_file == fp) | |
4423 | return lst; | |
4424 | } | |
4425 | return NULL; | |
4426 | } | |
4427 | ||
4428 | ||
fd39ca9a | 4429 | static int |
1da177e4 LT |
4430 | check_lock_length(u64 offset, u64 length) |
4431 | { | |
87df4de8 | 4432 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4433 | LOFF_OVERFLOW(offset, length))); |
4434 | } | |
4435 | ||
dcef0413 | 4436 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4437 | { |
4438 | struct nfs4_file *fp = lock_stp->st_file; | |
4439 | int oflag = nfs4_access_to_omode(access); | |
4440 | ||
82c5ff1b | 4441 | if (test_access(access, lock_stp)) |
0997b173 BF |
4442 | return; |
4443 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4444 | set_access(access, lock_stp); |
0997b173 BF |
4445 | } |
4446 | ||
2355c596 | 4447 | 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 |
4448 | { |
4449 | struct nfs4_file *fi = ost->st_file; | |
4450 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4451 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4452 | struct nfs4_lockowner *lo; | |
4453 | unsigned int strhashval; | |
20e9e2bc | 4454 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4455 | |
b3c32bcd | 4456 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn); |
c53530da JL |
4457 | if (!lo) { |
4458 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, | |
4459 | &lock->v.new.owner); | |
4460 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4461 | if (lo == NULL) | |
4462 | return nfserr_jukebox; | |
4463 | } else { | |
4464 | /* with an existing lockowner, seqids must be the same */ | |
4465 | if (!cstate->minorversion && | |
4466 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
64a284d0 | 4467 | return nfserr_bad_seqid; |
64a284d0 | 4468 | } |
c53530da JL |
4469 | |
4470 | *lst = find_lock_stateid(lo, fi); | |
64a284d0 | 4471 | if (*lst == NULL) { |
c53530da JL |
4472 | *lst = alloc_init_lock_stateid(lo, fi, ost); |
4473 | if (*lst == NULL) { | |
4474 | release_lockowner_if_empty(lo); | |
4475 | return nfserr_jukebox; | |
4476 | } | |
4477 | *new = true; | |
64a284d0 | 4478 | } |
64a284d0 BF |
4479 | return nfs_ok; |
4480 | } | |
4481 | ||
1da177e4 LT |
4482 | /* |
4483 | * LOCK operation | |
4484 | */ | |
b37ad28b | 4485 | __be32 |
ca364317 | 4486 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4487 | struct nfsd4_lock *lock) |
1da177e4 | 4488 | { |
fe0750e5 BF |
4489 | struct nfs4_openowner *open_sop = NULL; |
4490 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4491 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4492 | struct file *filp = NULL; |
21179d81 JL |
4493 | struct file_lock *file_lock = NULL; |
4494 | struct file_lock *conflock = NULL; | |
b37ad28b | 4495 | __be32 status = 0; |
64a284d0 | 4496 | bool new_state = false; |
b34f27aa | 4497 | int lkflg; |
b8dd7b9a | 4498 | int err; |
3320fef1 SK |
4499 | struct net *net = SVC_NET(rqstp); |
4500 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4501 | |
4502 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4503 | (long long) lock->lk_offset, | |
4504 | (long long) lock->lk_length); | |
4505 | ||
1da177e4 LT |
4506 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4507 | return nfserr_inval; | |
4508 | ||
ca364317 | 4509 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4510 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4511 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4512 | return status; | |
4513 | } | |
4514 | ||
1da177e4 LT |
4515 | nfs4_lock_state(); |
4516 | ||
4517 | if (lock->lk_is_new) { | |
dcef0413 | 4518 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4519 | |
4520 | if (nfsd4_has_session(cstate)) | |
4521 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4522 | memcpy(&lock->v.new.clientid, | |
4523 | &cstate->session->se_client->cl_clientid, | |
4524 | sizeof(clientid_t)); | |
4525 | ||
1da177e4 | 4526 | status = nfserr_stale_clientid; |
2c142baa | 4527 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4528 | goto out; |
1da177e4 | 4529 | |
1da177e4 | 4530 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4531 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4532 | lock->lk_new_open_seqid, |
4533 | &lock->lk_new_open_stateid, | |
3320fef1 | 4534 | &open_stp, nn); |
37515177 | 4535 | if (status) |
1da177e4 | 4536 | goto out; |
fe0750e5 | 4537 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4538 | status = nfserr_bad_stateid; |
684e5638 | 4539 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4540 | &lock->v.new.clientid)) |
4541 | goto out; | |
64a284d0 BF |
4542 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4543 | &lock_stp, &new_state); | |
e1aaa891 | 4544 | } else |
dd453dfd | 4545 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4546 | lock->lk_old_lock_seqid, |
4547 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4548 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4549 | if (status) |
4550 | goto out; | |
64a284d0 | 4551 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4552 | |
b34f27aa BF |
4553 | lkflg = setlkflg(lock->lk_type); |
4554 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4555 | if (status) | |
4556 | goto out; | |
4557 | ||
0dd395dc | 4558 | status = nfserr_grace; |
3320fef1 | 4559 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4560 | goto out; |
4561 | status = nfserr_no_grace; | |
3320fef1 | 4562 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4563 | goto out; |
4564 | ||
21179d81 JL |
4565 | file_lock = locks_alloc_lock(); |
4566 | if (!file_lock) { | |
4567 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4568 | status = nfserr_jukebox; | |
4569 | goto out; | |
4570 | } | |
4571 | ||
4572 | locks_init_lock(file_lock); | |
1da177e4 LT |
4573 | switch (lock->lk_type) { |
4574 | case NFS4_READ_LT: | |
4575 | case NFS4_READW_LT: | |
0997b173 BF |
4576 | filp = find_readable_file(lock_stp->st_file); |
4577 | if (filp) | |
4578 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4579 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4580 | break; |
1da177e4 LT |
4581 | case NFS4_WRITE_LT: |
4582 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4583 | filp = find_writeable_file(lock_stp->st_file); |
4584 | if (filp) | |
4585 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4586 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4587 | break; |
1da177e4 LT |
4588 | default: |
4589 | status = nfserr_inval; | |
4590 | goto out; | |
4591 | } | |
f9d7562f BF |
4592 | if (!filp) { |
4593 | status = nfserr_openmode; | |
4594 | goto out; | |
4595 | } | |
21179d81 JL |
4596 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4597 | file_lock->fl_pid = current->tgid; | |
4598 | file_lock->fl_file = filp; | |
4599 | file_lock->fl_flags = FL_POSIX; | |
4600 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4601 | file_lock->fl_start = lock->lk_offset; | |
4602 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4603 | nfs4_transform_lock_offset(file_lock); | |
4604 | ||
4605 | conflock = locks_alloc_lock(); | |
4606 | if (!conflock) { | |
4607 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4608 | status = nfserr_jukebox; | |
4609 | goto out; | |
4610 | } | |
1da177e4 | 4611 | |
21179d81 | 4612 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4613 | switch (-err) { |
1da177e4 | 4614 | case 0: /* success! */ |
dcef0413 BF |
4615 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4616 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4617 | sizeof(stateid_t)); |
b8dd7b9a | 4618 | status = 0; |
eb76b3fd AA |
4619 | break; |
4620 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4621 | status = nfserr_denied; | |
4622 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4623 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4624 | break; |
1da177e4 LT |
4625 | case (EDEADLK): |
4626 | status = nfserr_deadlock; | |
eb76b3fd | 4627 | break; |
3e772463 | 4628 | default: |
fd85b817 | 4629 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4630 | status = nfserrno(err); |
eb76b3fd | 4631 | break; |
1da177e4 | 4632 | } |
1da177e4 | 4633 | out: |
64a284d0 | 4634 | if (status && new_state) |
c53530da | 4635 | release_lock_stateid(lock_stp); |
9411b1d4 | 4636 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4637 | if (!cstate->replay_owner) |
4638 | nfs4_unlock_state(); | |
21179d81 JL |
4639 | if (file_lock) |
4640 | locks_free_lock(file_lock); | |
4641 | if (conflock) | |
4642 | locks_free_lock(conflock); | |
1da177e4 LT |
4643 | return status; |
4644 | } | |
4645 | ||
55ef1274 BF |
4646 | /* |
4647 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4648 | * so we do a temporary open here just to get an open file to pass to | |
4649 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4650 | * inode operation.) | |
4651 | */ | |
04da6e9d | 4652 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4653 | { |
4654 | struct file *file; | |
04da6e9d AV |
4655 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4656 | if (!err) { | |
4657 | err = nfserrno(vfs_test_lock(file, lock)); | |
4658 | nfsd_close(file); | |
4659 | } | |
55ef1274 BF |
4660 | return err; |
4661 | } | |
4662 | ||
1da177e4 LT |
4663 | /* |
4664 | * LOCKT operation | |
4665 | */ | |
b37ad28b | 4666 | __be32 |
ca364317 BF |
4667 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4668 | struct nfsd4_lockt *lockt) | |
1da177e4 | 4669 | { |
21179d81 | 4670 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4671 | struct nfs4_lockowner *lo; |
b37ad28b | 4672 | __be32 status; |
7f2210fa | 4673 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4674 | |
5ccb0066 | 4675 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4676 | return nfserr_grace; |
4677 | ||
4678 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4679 | return nfserr_inval; | |
4680 | ||
1da177e4 LT |
4681 | nfs4_lock_state(); |
4682 | ||
9b2ef62b | 4683 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 4684 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
4685 | if (status) |
4686 | goto out; | |
4687 | } | |
1da177e4 | 4688 | |
75c096f7 | 4689 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4690 | goto out; |
1da177e4 | 4691 | |
21179d81 JL |
4692 | file_lock = locks_alloc_lock(); |
4693 | if (!file_lock) { | |
4694 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4695 | status = nfserr_jukebox; | |
4696 | goto out; | |
4697 | } | |
4698 | locks_init_lock(file_lock); | |
1da177e4 LT |
4699 | switch (lockt->lt_type) { |
4700 | case NFS4_READ_LT: | |
4701 | case NFS4_READW_LT: | |
21179d81 | 4702 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4703 | break; |
4704 | case NFS4_WRITE_LT: | |
4705 | case NFS4_WRITEW_LT: | |
21179d81 | 4706 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4707 | break; |
4708 | default: | |
2fdada03 | 4709 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4710 | status = nfserr_inval; |
4711 | goto out; | |
4712 | } | |
4713 | ||
b3c32bcd | 4714 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4715 | if (lo) |
21179d81 JL |
4716 | file_lock->fl_owner = (fl_owner_t)lo; |
4717 | file_lock->fl_pid = current->tgid; | |
4718 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4719 | |
21179d81 JL |
4720 | file_lock->fl_start = lockt->lt_offset; |
4721 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4722 | |
21179d81 | 4723 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4724 | |
21179d81 | 4725 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4726 | if (status) |
fd85b817 | 4727 | goto out; |
04da6e9d | 4728 | |
21179d81 | 4729 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4730 | status = nfserr_denied; |
21179d81 | 4731 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4732 | } |
4733 | out: | |
4734 | nfs4_unlock_state(); | |
21179d81 JL |
4735 | if (file_lock) |
4736 | locks_free_lock(file_lock); | |
1da177e4 LT |
4737 | return status; |
4738 | } | |
4739 | ||
b37ad28b | 4740 | __be32 |
ca364317 | 4741 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4742 | struct nfsd4_locku *locku) |
1da177e4 | 4743 | { |
dcef0413 | 4744 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4745 | struct file *filp = NULL; |
21179d81 | 4746 | struct file_lock *file_lock = NULL; |
b37ad28b | 4747 | __be32 status; |
b8dd7b9a | 4748 | int err; |
3320fef1 SK |
4749 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4750 | ||
1da177e4 LT |
4751 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4752 | (long long) locku->lu_offset, | |
4753 | (long long) locku->lu_length); | |
4754 | ||
4755 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4756 | return nfserr_inval; | |
4757 | ||
4758 | nfs4_lock_state(); | |
4759 | ||
9072d5c6 | 4760 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4761 | &locku->lu_stateid, NFS4_LOCK_STID, |
4762 | &stp, nn); | |
9072d5c6 | 4763 | if (status) |
1da177e4 | 4764 | goto out; |
f9d7562f BF |
4765 | filp = find_any_file(stp->st_file); |
4766 | if (!filp) { | |
4767 | status = nfserr_lock_range; | |
4768 | goto out; | |
4769 | } | |
21179d81 JL |
4770 | file_lock = locks_alloc_lock(); |
4771 | if (!file_lock) { | |
4772 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4773 | status = nfserr_jukebox; | |
4774 | goto out; | |
4775 | } | |
4776 | locks_init_lock(file_lock); | |
4777 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 4778 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
4779 | file_lock->fl_pid = current->tgid; |
4780 | file_lock->fl_file = filp; | |
4781 | file_lock->fl_flags = FL_POSIX; | |
4782 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4783 | file_lock->fl_start = locku->lu_offset; | |
4784 | ||
4785 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4786 | locku->lu_length); | |
4787 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 4788 | |
21179d81 | 4789 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4790 | if (err) { |
fd85b817 | 4791 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4792 | goto out_nfserr; |
4793 | } | |
dcef0413 BF |
4794 | update_stateid(&stp->st_stid.sc_stateid); |
4795 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4796 | |
4797 | out: | |
9411b1d4 | 4798 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
4799 | if (!cstate->replay_owner) |
4800 | nfs4_unlock_state(); | |
21179d81 JL |
4801 | if (file_lock) |
4802 | locks_free_lock(file_lock); | |
1da177e4 LT |
4803 | return status; |
4804 | ||
4805 | out_nfserr: | |
b8dd7b9a | 4806 | status = nfserrno(err); |
1da177e4 LT |
4807 | goto out; |
4808 | } | |
4809 | ||
4810 | /* | |
4811 | * returns | |
4812 | * 1: locks held by lockowner | |
4813 | * 0: no locks held by lockowner | |
4814 | */ | |
4815 | static int | |
fe0750e5 | 4816 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4817 | { |
4818 | struct file_lock **flpp; | |
f9d7562f | 4819 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4820 | int status = 0; |
4821 | ||
1c8c601a | 4822 | spin_lock(&inode->i_lock); |
1da177e4 | 4823 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4824 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4825 | status = 1; |
4826 | goto out; | |
796dadfd | 4827 | } |
1da177e4 LT |
4828 | } |
4829 | out: | |
1c8c601a | 4830 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
4831 | return status; |
4832 | } | |
4833 | ||
b37ad28b | 4834 | __be32 |
b591480b BF |
4835 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4836 | struct nfsd4_compound_state *cstate, | |
4837 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4838 | { |
4839 | clientid_t *clid = &rlockowner->rl_clientid; | |
fd44907c | 4840 | struct nfs4_stateowner *sop = NULL, *tmp; |
fe0750e5 | 4841 | struct nfs4_lockowner *lo; |
dcef0413 | 4842 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4843 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
16bfdaaf | 4844 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4845 | __be32 status; |
7f2210fa | 4846 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4847 | |
4848 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4849 | clid->cl_boot, clid->cl_id); | |
4850 | ||
1da177e4 LT |
4851 | nfs4_lock_state(); |
4852 | ||
4b24ca7d | 4853 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
4854 | if (status) |
4855 | goto out; | |
4856 | ||
3e9e3dbe | 4857 | status = nfserr_locks_held; |
06f1f864 | 4858 | |
fd44907c JL |
4859 | /* Find the matching lock stateowner */ |
4860 | list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) { | |
4861 | if (tmp->so_is_open_owner) | |
06f1f864 | 4862 | continue; |
fd44907c JL |
4863 | if (same_owner_str(tmp, owner, clid)) { |
4864 | sop = tmp; | |
4865 | break; | |
1da177e4 | 4866 | } |
3e9e3dbe | 4867 | } |
fd44907c JL |
4868 | |
4869 | /* No matching owner found, maybe a replay? Just declare victory... */ | |
4870 | if (!sop) { | |
4871 | status = nfs_ok; | |
4872 | goto out; | |
4873 | } | |
4874 | ||
4875 | lo = lockowner(sop); | |
4876 | /* see if there are still any locks associated with it */ | |
4877 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
4878 | if (check_for_locks(stp->st_file, lo)) | |
4879 | goto out; | |
1da177e4 | 4880 | } |
fd44907c JL |
4881 | |
4882 | status = nfs_ok; | |
4883 | release_lockowner(lo); | |
1da177e4 LT |
4884 | out: |
4885 | nfs4_unlock_state(); | |
4886 | return status; | |
4887 | } | |
4888 | ||
4889 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4890 | alloc_reclaim(void) |
1da177e4 | 4891 | { |
a55370a3 | 4892 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4893 | } |
4894 | ||
0ce0c2b5 | 4895 | bool |
52e19c09 | 4896 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4897 | { |
0ce0c2b5 | 4898 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4899 | |
52e19c09 | 4900 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4901 | return (crp && crp->cr_clp); |
c7b9a459 N |
4902 | } |
4903 | ||
1da177e4 LT |
4904 | /* |
4905 | * failure => all reset bets are off, nfserr_no_grace... | |
4906 | */ | |
772a9bbb | 4907 | struct nfs4_client_reclaim * |
52e19c09 | 4908 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4909 | { |
4910 | unsigned int strhashval; | |
772a9bbb | 4911 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4912 | |
a55370a3 N |
4913 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4914 | crp = alloc_reclaim(); | |
772a9bbb JL |
4915 | if (crp) { |
4916 | strhashval = clientstr_hashval(name); | |
4917 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4918 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4919 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4920 | crp->cr_clp = NULL; |
52e19c09 | 4921 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4922 | } |
4923 | return crp; | |
1da177e4 LT |
4924 | } |
4925 | ||
ce30e539 | 4926 | void |
52e19c09 | 4927 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4928 | { |
4929 | list_del(&crp->cr_strhash); | |
4930 | kfree(crp); | |
52e19c09 | 4931 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4932 | } |
4933 | ||
2a4317c5 | 4934 | void |
52e19c09 | 4935 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4936 | { |
4937 | struct nfs4_client_reclaim *crp = NULL; | |
4938 | int i; | |
4939 | ||
1da177e4 | 4940 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4941 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4942 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4943 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4944 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4945 | } |
4946 | } | |
063b0fb9 | 4947 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4948 | } |
4949 | ||
4950 | /* | |
4951 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4952 | struct nfs4_client_reclaim * |
52e19c09 | 4953 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4954 | { |
4955 | unsigned int strhashval; | |
1da177e4 LT |
4956 | struct nfs4_client_reclaim *crp = NULL; |
4957 | ||
278c931c | 4958 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4959 | |
278c931c | 4960 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4961 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4962 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4963 | return crp; |
4964 | } | |
4965 | } | |
4966 | return NULL; | |
4967 | } | |
4968 | ||
4969 | /* | |
4970 | * Called from OPEN. Look for clientid in reclaim list. | |
4971 | */ | |
b37ad28b | 4972 | __be32 |
3320fef1 | 4973 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4974 | { |
a52d726b JL |
4975 | struct nfs4_client *clp; |
4976 | ||
4977 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4978 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4979 | if (clp == NULL) |
4980 | return nfserr_reclaim_bad; | |
4981 | ||
4982 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4983 | } |
4984 | ||
65178db4 BS |
4985 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4986 | ||
44e34da6 BS |
4987 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4988 | { | |
221a6876 BF |
4989 | if (mark_client_expired(clp)) |
4990 | return 0; | |
44e34da6 BS |
4991 | expire_client(clp); |
4992 | return 1; | |
4993 | } | |
4994 | ||
184c1847 BS |
4995 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4996 | { | |
4997 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4998 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4999 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5000 | return 1; | |
5001 | } | |
5002 | ||
5003 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5004 | const char *type) | |
5005 | { | |
5006 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5007 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5008 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5009 | } | |
5010 | ||
3c87b9b7 TM |
5011 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5012 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5013 | { |
5014 | struct nfs4_openowner *oop; | |
fc29171f | 5015 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5016 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5017 | u64 count = 0; |
5018 | ||
5019 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5020 | list_for_each_entry_safe(stp, st_next, |
5021 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5022 | list_for_each_entry_safe(lst, lst_next, | |
5023 | &stp->st_locks, st_locks) { | |
fc29171f | 5024 | if (func) |
3c87b9b7 | 5025 | func(lst); |
fc29171f BS |
5026 | if (++count == max) |
5027 | return count; | |
5028 | } | |
5029 | } | |
5030 | } | |
5031 | ||
5032 | return count; | |
5033 | } | |
5034 | ||
5035 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5036 | { | |
3c87b9b7 | 5037 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5038 | } |
5039 | ||
184c1847 BS |
5040 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5041 | { | |
5042 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5043 | nfsd_print_count(clp, count, "locked files"); | |
5044 | return count; | |
5045 | } | |
5046 | ||
4dbdbda8 BS |
5047 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5048 | { | |
5049 | struct nfs4_openowner *oop, *next; | |
5050 | u64 count = 0; | |
5051 | ||
5052 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5053 | if (func) | |
5054 | func(oop); | |
5055 | if (++count == max) | |
5056 | break; | |
5057 | } | |
5058 | ||
5059 | return count; | |
5060 | } | |
5061 | ||
5062 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5063 | { | |
5064 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5065 | } | |
5066 | ||
184c1847 BS |
5067 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5068 | { | |
5069 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5070 | nfsd_print_count(clp, count, "open files"); | |
5071 | return count; | |
5072 | } | |
5073 | ||
269de30f BS |
5074 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5075 | struct list_head *victims) | |
5076 | { | |
5077 | struct nfs4_delegation *dp, *next; | |
5078 | u64 count = 0; | |
5079 | ||
cdc97505 | 5080 | lockdep_assert_held(&state_lock); |
269de30f BS |
5081 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
5082 | if (victims) | |
5083 | list_move(&dp->dl_recall_lru, victims); | |
5084 | if (++count == max) | |
5085 | break; | |
5086 | } | |
5087 | return count; | |
5088 | } | |
5089 | ||
5090 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5091 | { | |
5092 | struct nfs4_delegation *dp, *next; | |
5093 | LIST_HEAD(victims); | |
5094 | u64 count; | |
5095 | ||
cdc97505 | 5096 | spin_lock(&state_lock); |
269de30f | 5097 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5098 | spin_unlock(&state_lock); |
269de30f BS |
5099 | |
5100 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
3bd64a5b | 5101 | revoke_delegation(dp); |
269de30f BS |
5102 | |
5103 | return count; | |
5104 | } | |
5105 | ||
5106 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5107 | { | |
5108 | struct nfs4_delegation *dp, *next; | |
5109 | LIST_HEAD(victims); | |
5110 | u64 count; | |
5111 | ||
cdc97505 | 5112 | spin_lock(&state_lock); |
269de30f BS |
5113 | count = nfsd_find_all_delegations(clp, max, &victims); |
5114 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
5115 | nfsd_break_one_deleg(dp); | |
cdc97505 | 5116 | spin_unlock(&state_lock); |
269de30f BS |
5117 | |
5118 | return count; | |
5119 | } | |
5120 | ||
184c1847 BS |
5121 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5122 | { | |
5123 | u64 count = 0; | |
5124 | ||
cdc97505 | 5125 | spin_lock(&state_lock); |
184c1847 | 5126 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5127 | spin_unlock(&state_lock); |
184c1847 BS |
5128 | |
5129 | nfsd_print_count(clp, count, "delegations"); | |
5130 | return count; | |
5131 | } | |
5132 | ||
44e34da6 | 5133 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5134 | { |
5135 | struct nfs4_client *clp, *next; | |
44e34da6 | 5136 | u64 count = 0; |
3320fef1 | 5137 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5138 | |
44e34da6 BS |
5139 | if (!nfsd_netns_ready(nn)) |
5140 | return 0; | |
5141 | ||
5ed58bb2 | 5142 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5143 | count += func(clp, max - count); |
5144 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5145 | break; |
5146 | } | |
65178db4 | 5147 | |
44e34da6 BS |
5148 | return count; |
5149 | } | |
5150 | ||
6c1e82a4 BS |
5151 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5152 | { | |
5153 | struct nfs4_client *clp; | |
5154 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5155 | ||
5156 | if (!nfsd_netns_ready(nn)) | |
5157 | return NULL; | |
5158 | ||
5159 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5160 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5161 | return clp; | |
5162 | } | |
5163 | return NULL; | |
5164 | } | |
5165 | ||
65178db4 BS |
5166 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5167 | ||
c2f1a551 MS |
5168 | /* |
5169 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5170 | * client may quite reasonably hang on to a delegation as long as it has | |
5171 | * the inode cached. This becomes an obvious problem the first time a | |
5172 | * client's inode cache approaches the size of the server's total memory. | |
5173 | * | |
5174 | * For now we avoid this problem by imposing a hard limit on the number | |
5175 | * of delegations, which varies according to the server's memory size. | |
5176 | */ | |
5177 | static void | |
5178 | set_max_delegations(void) | |
5179 | { | |
5180 | /* | |
5181 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5182 | * estimates suggest that in the worst case (where every delegation | |
5183 | * is for a different inode), a delegation could take about 1.5K, | |
5184 | * giving a worst case usage of about 6% of memory. | |
5185 | */ | |
5186 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5187 | } | |
5188 | ||
d85ed443 | 5189 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5190 | { |
5191 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5192 | int i; | |
5193 | ||
5194 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5195 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5196 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5197 | goto err; |
0a7ec377 SK |
5198 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5199 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5200 | if (!nn->unconf_id_hashtbl) | |
5201 | goto err_unconf_id; | |
9b531137 SK |
5202 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
5203 | OWNER_HASH_SIZE, GFP_KERNEL); | |
5204 | if (!nn->ownerstr_hashtbl) | |
5205 | goto err_ownerstr; | |
1872de0e SK |
5206 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5207 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5208 | if (!nn->sessionid_hashtbl) | |
5209 | goto err_sessionid; | |
8daae4dc | 5210 | |
382a62e7 | 5211 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5212 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5213 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5214 | } |
9b531137 SK |
5215 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
5216 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
1872de0e SK |
5217 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5218 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5219 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5220 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5221 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5222 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5223 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5224 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5225 | |
09121281 | 5226 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5227 | get_net(net); |
09121281 | 5228 | |
8daae4dc | 5229 | return 0; |
382a62e7 | 5230 | |
1872de0e | 5231 | err_sessionid: |
20e9e2bc | 5232 | kfree(nn->ownerstr_hashtbl); |
9b531137 SK |
5233 | err_ownerstr: |
5234 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5235 | err_unconf_id: |
5236 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5237 | err: |
5238 | return -ENOMEM; | |
8daae4dc SK |
5239 | } |
5240 | ||
5241 | static void | |
4dce0ac9 | 5242 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5243 | { |
5244 | int i; | |
5245 | struct nfs4_client *clp = NULL; | |
5246 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5247 | ||
5248 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5249 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5250 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5251 | destroy_client(clp); | |
5252 | } | |
5253 | } | |
a99454aa | 5254 | |
2b905635 KM |
5255 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5256 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5257 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5258 | destroy_client(clp); | |
5259 | } | |
a99454aa SK |
5260 | } |
5261 | ||
1872de0e | 5262 | kfree(nn->sessionid_hashtbl); |
9b531137 | 5263 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5264 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5265 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5266 | put_net(net); |
8daae4dc SK |
5267 | } |
5268 | ||
f252bc68 | 5269 | int |
d85ed443 | 5270 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5271 | { |
5e1533c7 | 5272 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5273 | int ret; |
5274 | ||
d85ed443 | 5275 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5276 | if (ret) |
5277 | return ret; | |
5e1533c7 | 5278 | nfsd4_client_tracking_init(net); |
2c142baa | 5279 | nn->boot_time = get_seconds(); |
5ccb0066 | 5280 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5281 | nn->grace_ended = false; |
d85ed443 | 5282 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5283 | nn->nfsd4_grace, net); |
5284 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5285 | return 0; |
5286 | } | |
5287 | ||
5288 | /* initialization to perform when the nfsd service is started: */ | |
5289 | ||
5290 | int | |
5291 | nfs4_state_start(void) | |
5292 | { | |
5293 | int ret; | |
5294 | ||
b5a1a81e | 5295 | ret = set_callback_cred(); |
d85ed443 SK |
5296 | if (ret) |
5297 | return -ENOMEM; | |
58da282b | 5298 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5299 | if (laundry_wq == NULL) { |
5300 | ret = -ENOMEM; | |
5301 | goto out_recovery; | |
5302 | } | |
b5a1a81e BF |
5303 | ret = nfsd4_create_callback_queue(); |
5304 | if (ret) | |
5305 | goto out_free_laundry; | |
09121281 | 5306 | |
c2f1a551 | 5307 | set_max_delegations(); |
d85ed443 | 5308 | |
b5a1a81e | 5309 | return 0; |
d85ed443 | 5310 | |
b5a1a81e BF |
5311 | out_free_laundry: |
5312 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5313 | out_recovery: |
b5a1a81e | 5314 | return ret; |
1da177e4 LT |
5315 | } |
5316 | ||
f252bc68 | 5317 | void |
4dce0ac9 | 5318 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5319 | { |
1da177e4 | 5320 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5321 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5322 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5323 | |
4dce0ac9 SK |
5324 | cancel_delayed_work_sync(&nn->laundromat_work); |
5325 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5326 | |
e50a26dc | 5327 | nfs4_lock_state(); |
1da177e4 | 5328 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5329 | spin_lock(&state_lock); |
e8c69d17 | 5330 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
5331 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
5332 | list_move(&dp->dl_recall_lru, &reaplist); | |
5333 | } | |
cdc97505 | 5334 | spin_unlock(&state_lock); |
1da177e4 LT |
5335 | list_for_each_safe(pos, next, &reaplist) { |
5336 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 5337 | destroy_delegation(dp); |
1da177e4 LT |
5338 | } |
5339 | ||
3320fef1 | 5340 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5341 | nfs4_state_destroy_net(net); |
e50a26dc | 5342 | nfs4_unlock_state(); |
1da177e4 LT |
5343 | } |
5344 | ||
5345 | void | |
5346 | nfs4_state_shutdown(void) | |
5347 | { | |
5e8d5c29 | 5348 | destroy_workqueue(laundry_wq); |
c3935e30 | 5349 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5350 | } |
8b70484c TM |
5351 | |
5352 | static void | |
5353 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5354 | { | |
37c593c5 TM |
5355 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5356 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5357 | } |
5358 | ||
5359 | static void | |
5360 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5361 | { | |
37c593c5 TM |
5362 | if (cstate->minorversion) { |
5363 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5364 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5365 | } | |
5366 | } | |
5367 | ||
5368 | void | |
5369 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5370 | { | |
5371 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5372 | } |
5373 | ||
62cd4a59 TM |
5374 | /* |
5375 | * functions to set current state id | |
5376 | */ | |
9428fe1a TM |
5377 | void |
5378 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5379 | { | |
5380 | put_stateid(cstate, &odp->od_stateid); | |
5381 | } | |
5382 | ||
8b70484c TM |
5383 | void |
5384 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5385 | { | |
5386 | put_stateid(cstate, &open->op_stateid); | |
5387 | } | |
5388 | ||
62cd4a59 TM |
5389 | void |
5390 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5391 | { | |
5392 | put_stateid(cstate, &close->cl_stateid); | |
5393 | } | |
5394 | ||
5395 | void | |
5396 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5397 | { | |
5398 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5399 | } | |
5400 | ||
5401 | /* | |
5402 | * functions to consume current state id | |
5403 | */ | |
1e97b519 | 5404 | |
9428fe1a TM |
5405 | void |
5406 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5407 | { | |
5408 | get_stateid(cstate, &odp->od_stateid); | |
5409 | } | |
5410 | ||
5411 | void | |
5412 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5413 | { | |
5414 | get_stateid(cstate, &drp->dr_stateid); | |
5415 | } | |
5416 | ||
1e97b519 TM |
5417 | void |
5418 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5419 | { | |
5420 | get_stateid(cstate, &fsp->fr_stateid); | |
5421 | } | |
5422 | ||
5423 | void | |
5424 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5425 | { | |
5426 | get_stateid(cstate, &setattr->sa_stateid); | |
5427 | } | |
5428 | ||
8b70484c TM |
5429 | void |
5430 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5431 | { | |
5432 | get_stateid(cstate, &close->cl_stateid); | |
5433 | } | |
5434 | ||
5435 | void | |
62cd4a59 | 5436 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5437 | { |
62cd4a59 | 5438 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5439 | } |
30813e27 TM |
5440 | |
5441 | void | |
5442 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5443 | { | |
5444 | get_stateid(cstate, &read->rd_stateid); | |
5445 | } | |
5446 | ||
5447 | void | |
5448 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5449 | { | |
5450 | get_stateid(cstate, &write->wr_stateid); | |
5451 | } |