Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
9a74af21 | 44 | #include "xdr4.h" |
06b332a5 | 45 | #include "xdr4cb.h" |
0a3adade | 46 | #include "vfs.h" |
bfa4b365 | 47 | #include "current_stateid.h" |
1da177e4 | 48 | |
5e1533c7 SK |
49 | #include "netns.h" |
50 | ||
1da177e4 LT |
51 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
52 | ||
f32f3c2d BF |
53 | #define all_ones {{~0,~0},~0} |
54 | static const stateid_t one_stateid = { | |
55 | .si_generation = ~0, | |
56 | .si_opaque = all_ones, | |
57 | }; | |
58 | static const stateid_t zero_stateid = { | |
59 | /* all fields zero */ | |
60 | }; | |
19ff0f28 TM |
61 | static const stateid_t currentstateid = { |
62 | .si_generation = 1, | |
63 | }; | |
f32f3c2d | 64 | |
ec6b5d7b | 65 | static u64 current_sessionid = 1; |
fd39ca9a | 66 | |
f32f3c2d BF |
67 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
68 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 69 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 70 | |
1da177e4 | 71 | /* forward declarations */ |
fe0750e5 | 72 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 73 | |
8b671b80 BF |
74 | /* Locking: */ |
75 | ||
76 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 77 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 78 | |
8b671b80 BF |
79 | /* |
80 | * Currently used for the del_recall_lru and file hash table. In an | |
81 | * effort to decrease the scope of the client_mutex, this spinlock may | |
82 | * eventually cover more: | |
83 | */ | |
84 | static DEFINE_SPINLOCK(recall_lock); | |
85 | ||
fe0750e5 BF |
86 | static struct kmem_cache *openowner_slab = NULL; |
87 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
88 | static struct kmem_cache *file_slab = NULL; |
89 | static struct kmem_cache *stateid_slab = NULL; | |
90 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 91 | |
1da177e4 LT |
92 | void |
93 | nfs4_lock_state(void) | |
94 | { | |
353ab6e9 | 95 | mutex_lock(&client_mutex); |
1da177e4 LT |
96 | } |
97 | ||
66b2b9b2 | 98 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 99 | |
66b2b9b2 BF |
100 | void nfsd4_put_session(struct nfsd4_session *ses) |
101 | { | |
102 | atomic_dec(&ses->se_ref); | |
103 | } | |
104 | ||
105 | static bool is_session_dead(struct nfsd4_session *ses) | |
508dc6e1 | 106 | { |
66b2b9b2 BF |
107 | return ses->se_flags & NFS4_SESSION_DEAD; |
108 | } | |
109 | ||
110 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses) | |
111 | { | |
112 | if (atomic_read(&ses->se_ref)) | |
113 | return nfserr_jukebox; | |
114 | ses->se_flags |= NFS4_SESSION_DEAD; | |
115 | return nfs_ok; | |
508dc6e1 BH |
116 | } |
117 | ||
66b2b9b2 | 118 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
508dc6e1 | 119 | { |
66b2b9b2 BF |
120 | if (is_session_dead(ses)) |
121 | return nfserr_badsession; | |
122 | atomic_inc(&ses->se_ref); | |
123 | return nfs_ok; | |
508dc6e1 BH |
124 | } |
125 | ||
1da177e4 LT |
126 | void |
127 | nfs4_unlock_state(void) | |
128 | { | |
353ab6e9 | 129 | mutex_unlock(&client_mutex); |
1da177e4 LT |
130 | } |
131 | ||
221a6876 BF |
132 | static bool is_client_expired(struct nfs4_client *clp) |
133 | { | |
134 | return clp->cl_time == 0; | |
135 | } | |
136 | ||
137 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
138 | { | |
139 | if (atomic_read(&clp->cl_refcount)) | |
140 | return nfserr_jukebox; | |
141 | clp->cl_time = 0; | |
142 | return nfs_ok; | |
143 | } | |
144 | ||
145 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
146 | { | |
147 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
148 | __be32 ret; | |
149 | ||
150 | spin_lock(&nn->client_lock); | |
151 | ret = mark_client_expired_locked(clp); | |
152 | spin_unlock(&nn->client_lock); | |
153 | return ret; | |
154 | } | |
155 | ||
156 | static __be32 get_client_locked(struct nfs4_client *clp) | |
157 | { | |
158 | if (is_client_expired(clp)) | |
159 | return nfserr_expired; | |
160 | atomic_inc(&clp->cl_refcount); | |
161 | return nfs_ok; | |
162 | } | |
163 | ||
164 | /* must be called under the client_lock */ | |
165 | static inline void | |
166 | renew_client_locked(struct nfs4_client *clp) | |
167 | { | |
168 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
169 | ||
170 | if (is_client_expired(clp)) { | |
171 | WARN_ON(1); | |
172 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
173 | __func__, | |
174 | clp->cl_clientid.cl_boot, | |
175 | clp->cl_clientid.cl_id); | |
176 | return; | |
177 | } | |
178 | ||
179 | dprintk("renewing client (clientid %08x/%08x)\n", | |
180 | clp->cl_clientid.cl_boot, | |
181 | clp->cl_clientid.cl_id); | |
182 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
183 | clp->cl_time = get_seconds(); | |
184 | } | |
185 | ||
186 | static inline void | |
187 | renew_client(struct nfs4_client *clp) | |
188 | { | |
189 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
190 | ||
191 | spin_lock(&nn->client_lock); | |
192 | renew_client_locked(clp); | |
193 | spin_unlock(&nn->client_lock); | |
194 | } | |
195 | ||
ba138435 | 196 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
197 | { |
198 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
199 | return; | |
200 | if (!is_client_expired(clp)) | |
201 | renew_client_locked(clp); | |
202 | } | |
203 | ||
204 | void put_client_renew(struct nfs4_client *clp) | |
205 | { | |
206 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
207 | ||
208 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) | |
209 | return; | |
210 | if (!is_client_expired(clp)) | |
211 | renew_client_locked(clp); | |
212 | spin_unlock(&nn->client_lock); | |
213 | } | |
214 | ||
215 | ||
1da177e4 LT |
216 | static inline u32 |
217 | opaque_hashval(const void *ptr, int nbytes) | |
218 | { | |
219 | unsigned char *cptr = (unsigned char *) ptr; | |
220 | ||
221 | u32 x = 0; | |
222 | while (nbytes--) { | |
223 | x *= 37; | |
224 | x += *cptr++; | |
225 | } | |
226 | return x; | |
227 | } | |
228 | ||
32513b40 BF |
229 | static void nfsd4_free_file(struct nfs4_file *f) |
230 | { | |
231 | kmem_cache_free(file_slab, f); | |
232 | } | |
233 | ||
13cd2184 N |
234 | static inline void |
235 | put_nfs4_file(struct nfs4_file *fi) | |
236 | { | |
8b671b80 | 237 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
89876f8c | 238 | hlist_del(&fi->fi_hash); |
8b671b80 BF |
239 | spin_unlock(&recall_lock); |
240 | iput(fi->fi_inode); | |
32513b40 | 241 | nfsd4_free_file(fi); |
8b671b80 | 242 | } |
13cd2184 N |
243 | } |
244 | ||
245 | static inline void | |
246 | get_nfs4_file(struct nfs4_file *fi) | |
247 | { | |
8b671b80 | 248 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
249 | } |
250 | ||
ef0f3390 | 251 | static int num_delegations; |
697ce9be | 252 | unsigned long max_delegations; |
ef0f3390 N |
253 | |
254 | /* | |
255 | * Open owner state (share locks) | |
256 | */ | |
257 | ||
16bfdaaf BF |
258 | /* hash tables for lock and open owners */ |
259 | #define OWNER_HASH_BITS 8 | |
260 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
261 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 262 | |
16bfdaaf | 263 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
264 | { |
265 | unsigned int ret; | |
266 | ||
267 | ret = opaque_hashval(ownername->data, ownername->len); | |
268 | ret += clientid; | |
16bfdaaf | 269 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 270 | } |
ef0f3390 | 271 | |
ef0f3390 N |
272 | /* hash table for nfs4_file */ |
273 | #define FILE_HASH_BITS 8 | |
274 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 275 | |
ddc04c41 BF |
276 | static unsigned int file_hashval(struct inode *ino) |
277 | { | |
278 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
279 | return hash_ptr(ino, FILE_HASH_BITS); | |
280 | } | |
281 | ||
89876f8c | 282 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 283 | |
998db52c | 284 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 285 | { |
063b0fb9 | 286 | WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); |
f9d7562f BF |
287 | atomic_inc(&fp->fi_access[oflag]); |
288 | } | |
289 | ||
998db52c BF |
290 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
291 | { | |
292 | if (oflag == O_RDWR) { | |
293 | __nfs4_file_get_access(fp, O_RDONLY); | |
294 | __nfs4_file_get_access(fp, O_WRONLY); | |
295 | } else | |
296 | __nfs4_file_get_access(fp, oflag); | |
297 | } | |
298 | ||
299 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
300 | { |
301 | if (fp->fi_fds[oflag]) { | |
302 | fput(fp->fi_fds[oflag]); | |
303 | fp->fi_fds[oflag] = NULL; | |
304 | } | |
305 | } | |
306 | ||
998db52c | 307 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
308 | { |
309 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 310 | nfs4_file_put_fd(fp, oflag); |
0c7c3e67 | 311 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
3d02fa29 | 312 | nfs4_file_put_fd(fp, O_RDWR); |
f9d7562f BF |
313 | } |
314 | } | |
315 | ||
998db52c BF |
316 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
317 | { | |
318 | if (oflag == O_RDWR) { | |
319 | __nfs4_file_put_access(fp, O_RDONLY); | |
320 | __nfs4_file_put_access(fp, O_WRONLY); | |
321 | } else | |
322 | __nfs4_file_put_access(fp, oflag); | |
323 | } | |
324 | ||
3abdb607 BF |
325 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
326 | kmem_cache *slab) | |
2a74aba7 | 327 | { |
3abdb607 BF |
328 | struct idr *stateids = &cl->cl_stateids; |
329 | static int min_stateid = 0; | |
330 | struct nfs4_stid *stid; | |
6136d2b4 | 331 | int new_id; |
2a74aba7 | 332 | |
3abdb607 BF |
333 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
334 | if (!stid) | |
335 | return NULL; | |
336 | ||
ebd6c707 TH |
337 | new_id = idr_alloc(stateids, stid, min_stateid, 0, GFP_KERNEL); |
338 | if (new_id < 0) | |
3abdb607 | 339 | goto out_free; |
2a74aba7 | 340 | stid->sc_client = cl; |
3abdb607 BF |
341 | stid->sc_type = 0; |
342 | stid->sc_stateid.si_opaque.so_id = new_id; | |
343 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 344 | /* Will be incremented before return to client: */ |
3abdb607 | 345 | stid->sc_stateid.si_generation = 0; |
996e0938 | 346 | |
996e0938 | 347 | /* |
3abdb607 BF |
348 | * It shouldn't be a problem to reuse an opaque stateid value. |
349 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
350 | * example, a stray write retransmission could be accepted by | |
351 | * the server when it should have been rejected. Therefore, | |
352 | * adopt a trick from the sctp code to attempt to maximize the | |
353 | * amount of time until an id is reused, by ensuring they always | |
354 | * "increase" (mod INT_MAX): | |
996e0938 | 355 | */ |
3abdb607 BF |
356 | |
357 | min_stateid = new_id+1; | |
358 | if (min_stateid == INT_MAX) | |
359 | min_stateid = 0; | |
360 | return stid; | |
361 | out_free: | |
2c44a234 | 362 | kmem_cache_free(slab, stid); |
3abdb607 | 363 | return NULL; |
2a74aba7 BF |
364 | } |
365 | ||
4cdc951b BF |
366 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
367 | { | |
368 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
369 | } | |
370 | ||
1da177e4 | 371 | static struct nfs4_delegation * |
dcef0413 | 372 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
373 | { |
374 | struct nfs4_delegation *dp; | |
375 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
376 | |
377 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
378 | /* |
379 | * Major work on the lease subsystem (for example, to support | |
380 | * calbacks on stat) will be required before we can support | |
381 | * write delegations properly. | |
382 | */ | |
383 | if (type != NFS4_OPEN_DELEGATE_READ) | |
384 | return NULL; | |
47f9940c MS |
385 | if (fp->fi_had_conflict) |
386 | return NULL; | |
c2f1a551 | 387 | if (num_delegations > max_delegations) |
ef0f3390 | 388 | return NULL; |
996e0938 | 389 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 390 | if (dp == NULL) |
1da177e4 | 391 | return dp; |
3abdb607 | 392 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
2a74aba7 BF |
393 | /* |
394 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
395 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
396 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
397 | */ |
398 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 399 | num_delegations++; |
ea1da636 N |
400 | INIT_LIST_HEAD(&dp->dl_perfile); |
401 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 402 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 403 | get_nfs4_file(fp); |
1da177e4 | 404 | dp->dl_file = fp; |
1da177e4 | 405 | dp->dl_type = type; |
6c02eaa1 | 406 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
407 | dp->dl_time = 0; |
408 | atomic_set(&dp->dl_count, 1); | |
57725155 | 409 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
410 | return dp; |
411 | } | |
412 | ||
68a33961 | 413 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
414 | { |
415 | struct idr *stateids = &s->sc_client->cl_stateids; | |
416 | ||
417 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
418 | } |
419 | ||
1da177e4 LT |
420 | void |
421 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
422 | { | |
423 | if (atomic_dec_and_test(&dp->dl_count)) { | |
68a33961 | 424 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 425 | num_delegations--; |
1da177e4 LT |
426 | } |
427 | } | |
428 | ||
acfdf5c3 | 429 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 430 | { |
acfdf5c3 BF |
431 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
432 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
433 | fp->fi_lease = NULL; | |
4ee63624 | 434 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
435 | fp->fi_deleg_file = NULL; |
436 | } | |
1da177e4 LT |
437 | } |
438 | ||
6136d2b4 BF |
439 | static void unhash_stid(struct nfs4_stid *s) |
440 | { | |
3abdb607 | 441 | s->sc_type = 0; |
6136d2b4 BF |
442 | } |
443 | ||
1da177e4 LT |
444 | /* Called under the state lock. */ |
445 | static void | |
446 | unhash_delegation(struct nfs4_delegation *dp) | |
447 | { | |
ea1da636 | 448 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 449 | spin_lock(&recall_lock); |
5d926e8c | 450 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
451 | list_del_init(&dp->dl_recall_lru); |
452 | spin_unlock(&recall_lock); | |
acfdf5c3 | 453 | nfs4_put_deleg_lease(dp->dl_file); |
68a33961 BF |
454 | put_nfs4_file(dp->dl_file); |
455 | dp->dl_file = NULL; | |
3bd64a5b BF |
456 | } |
457 | ||
458 | ||
459 | ||
460 | static void destroy_revoked_delegation(struct nfs4_delegation *dp) | |
461 | { | |
462 | list_del_init(&dp->dl_recall_lru); | |
68a33961 | 463 | remove_stid(&dp->dl_stid); |
1da177e4 LT |
464 | nfs4_put_delegation(dp); |
465 | } | |
466 | ||
3bd64a5b BF |
467 | static void destroy_delegation(struct nfs4_delegation *dp) |
468 | { | |
469 | unhash_delegation(dp); | |
470 | remove_stid(&dp->dl_stid); | |
471 | nfs4_put_delegation(dp); | |
472 | } | |
473 | ||
474 | static void revoke_delegation(struct nfs4_delegation *dp) | |
475 | { | |
476 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
477 | ||
478 | if (clp->cl_minorversion == 0) | |
479 | destroy_delegation(dp); | |
480 | else { | |
481 | unhash_delegation(dp); | |
482 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; | |
483 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
484 | } | |
485 | } | |
486 | ||
1da177e4 LT |
487 | /* |
488 | * SETCLIENTID state | |
489 | */ | |
490 | ||
ddc04c41 BF |
491 | static unsigned int clientid_hashval(u32 id) |
492 | { | |
493 | return id & CLIENT_HASH_MASK; | |
494 | } | |
495 | ||
496 | static unsigned int clientstr_hashval(const char *name) | |
497 | { | |
498 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
499 | } | |
500 | ||
f9d7562f BF |
501 | /* |
502 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
503 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
504 | * only what share bits are currently in force, but also what | |
505 | * combinations of share bits previous opens have used. This allows us | |
506 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
507 | * return an error if the client attempt to downgrade to a combination | |
508 | * of share bits not explicable by closing some of its previous opens. | |
509 | * | |
510 | * XXX: This enforcement is actually incomplete, since we don't keep | |
511 | * track of access/deny bit combinations; so, e.g., we allow: | |
512 | * | |
513 | * OPEN allow read, deny write | |
514 | * OPEN allow both, deny none | |
515 | * DOWNGRADE allow read, deny none | |
516 | * | |
517 | * which we should reject. | |
518 | */ | |
5ae037e5 JL |
519 | static unsigned int |
520 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 521 | int i; |
5ae037e5 | 522 | unsigned int access = 0; |
f9d7562f | 523 | |
f9d7562f BF |
524 | for (i = 1; i < 4; i++) { |
525 | if (test_bit(i, &bmap)) | |
5ae037e5 | 526 | access |= i; |
f9d7562f | 527 | } |
5ae037e5 | 528 | return access; |
f9d7562f BF |
529 | } |
530 | ||
3a328614 | 531 | static bool |
dcef0413 | 532 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
533 | unsigned int access, deny; |
534 | ||
5ae037e5 JL |
535 | access = bmap_to_share_mode(stp->st_access_bmap); |
536 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 537 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
538 | return false; |
539 | return true; | |
f9d7562f BF |
540 | } |
541 | ||
82c5ff1b JL |
542 | /* set share access for a given stateid */ |
543 | static inline void | |
544 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
545 | { | |
546 | __set_bit(access, &stp->st_access_bmap); | |
547 | } | |
548 | ||
549 | /* clear share access for a given stateid */ | |
550 | static inline void | |
551 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
552 | { | |
553 | __clear_bit(access, &stp->st_access_bmap); | |
554 | } | |
555 | ||
556 | /* test whether a given stateid has access */ | |
557 | static inline bool | |
558 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
559 | { | |
560 | return test_bit(access, &stp->st_access_bmap); | |
561 | } | |
562 | ||
ce0fc43c JL |
563 | /* set share deny for a given stateid */ |
564 | static inline void | |
565 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
566 | { | |
567 | __set_bit(access, &stp->st_deny_bmap); | |
568 | } | |
569 | ||
570 | /* clear share deny for a given stateid */ | |
571 | static inline void | |
572 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
573 | { | |
574 | __clear_bit(access, &stp->st_deny_bmap); | |
575 | } | |
576 | ||
577 | /* test whether a given stateid is denying specific access */ | |
578 | static inline bool | |
579 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
580 | { | |
581 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
582 | } |
583 | ||
584 | static int nfs4_access_to_omode(u32 access) | |
585 | { | |
8f34a430 | 586 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
587 | case NFS4_SHARE_ACCESS_READ: |
588 | return O_RDONLY; | |
589 | case NFS4_SHARE_ACCESS_WRITE: | |
590 | return O_WRONLY; | |
591 | case NFS4_SHARE_ACCESS_BOTH: | |
592 | return O_RDWR; | |
593 | } | |
063b0fb9 BF |
594 | WARN_ON_ONCE(1); |
595 | return O_RDONLY; | |
f9d7562f BF |
596 | } |
597 | ||
82c5ff1b JL |
598 | /* release all access and file references for a given stateid */ |
599 | static void | |
600 | release_all_access(struct nfs4_ol_stateid *stp) | |
601 | { | |
602 | int i; | |
603 | ||
604 | for (i = 1; i < 4; i++) { | |
605 | if (test_access(i, stp)) | |
606 | nfs4_file_put_access(stp->st_file, | |
607 | nfs4_access_to_omode(i)); | |
608 | clear_access(i, stp); | |
609 | } | |
610 | } | |
611 | ||
dcef0413 | 612 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 613 | { |
529d7b2a BF |
614 | list_del(&stp->st_perfile); |
615 | list_del(&stp->st_perstateowner); | |
616 | } | |
617 | ||
dcef0413 | 618 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 619 | { |
82c5ff1b | 620 | release_all_access(stp); |
a96e5b90 | 621 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
622 | stp->st_file = NULL; |
623 | } | |
624 | ||
dcef0413 | 625 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 626 | { |
68a33961 BF |
627 | remove_stid(&stp->st_stid); |
628 | kmem_cache_free(stateid_slab, stp); | |
529d7b2a BF |
629 | } |
630 | ||
dcef0413 | 631 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
632 | { |
633 | struct file *file; | |
634 | ||
635 | unhash_generic_stateid(stp); | |
6136d2b4 | 636 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
637 | file = find_any_file(stp->st_file); |
638 | if (file) | |
fe0750e5 | 639 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 640 | close_generic_stateid(stp); |
529d7b2a BF |
641 | free_generic_stateid(stp); |
642 | } | |
643 | ||
fe0750e5 | 644 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 645 | { |
dcef0413 | 646 | struct nfs4_ol_stateid *stp; |
529d7b2a | 647 | |
fe0750e5 BF |
648 | list_del(&lo->lo_owner.so_strhash); |
649 | list_del(&lo->lo_perstateid); | |
009673b4 | 650 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
651 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
652 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 653 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
654 | release_lock_stateid(stp); |
655 | } | |
656 | } | |
657 | ||
fe0750e5 | 658 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 659 | { |
fe0750e5 BF |
660 | unhash_lockowner(lo); |
661 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
662 | } |
663 | ||
664 | static void | |
dcef0413 | 665 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 666 | { |
fe0750e5 | 667 | struct nfs4_lockowner *lo; |
529d7b2a BF |
668 | |
669 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
670 | lo = list_entry(open_stp->st_lockowners.next, |
671 | struct nfs4_lockowner, lo_perstateid); | |
672 | release_lockowner(lo); | |
529d7b2a BF |
673 | } |
674 | } | |
675 | ||
38c387b5 | 676 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
677 | { |
678 | unhash_generic_stateid(stp); | |
679 | release_stateid_lockowners(stp); | |
38c387b5 BF |
680 | close_generic_stateid(stp); |
681 | } | |
682 | ||
683 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
684 | { | |
685 | unhash_open_stateid(stp); | |
6136d2b4 | 686 | unhash_stid(&stp->st_stid); |
2283963f BF |
687 | free_generic_stateid(stp); |
688 | } | |
689 | ||
fe0750e5 | 690 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 691 | { |
dcef0413 | 692 | struct nfs4_ol_stateid *stp; |
f1d110ca | 693 | |
fe0750e5 BF |
694 | list_del(&oo->oo_owner.so_strhash); |
695 | list_del(&oo->oo_perclient); | |
696 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
697 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 698 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 699 | release_open_stateid(stp); |
f1d110ca BF |
700 | } |
701 | } | |
702 | ||
f7a4d872 BF |
703 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
704 | { | |
705 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
706 | ||
707 | if (s) { | |
6136d2b4 | 708 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
709 | free_generic_stateid(s); |
710 | oo->oo_last_closed_stid = NULL; | |
711 | } | |
712 | } | |
713 | ||
fe0750e5 | 714 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 715 | { |
fe0750e5 BF |
716 | unhash_openowner(oo); |
717 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 718 | release_last_closed_stateid(oo); |
fe0750e5 | 719 | nfs4_free_openowner(oo); |
f1d110ca BF |
720 | } |
721 | ||
5282fd72 ME |
722 | static inline int |
723 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
724 | { | |
725 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
726 | ||
727 | return sid->sequence % SESSION_HASH_SIZE; | |
728 | } | |
729 | ||
8f199b82 | 730 | #ifdef NFSD_DEBUG |
5282fd72 ME |
731 | static inline void |
732 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
733 | { | |
734 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
735 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
736 | } | |
8f199b82 TM |
737 | #else |
738 | static inline void | |
739 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
740 | { | |
741 | } | |
742 | #endif | |
743 | ||
9411b1d4 BF |
744 | /* |
745 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
746 | * won't be used for replay. | |
747 | */ | |
748 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
749 | { | |
750 | struct nfs4_stateowner *so = cstate->replay_owner; | |
751 | ||
752 | if (nfserr == nfserr_replay_me) | |
753 | return; | |
754 | ||
755 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
756 | cstate->replay_owner = NULL; | |
757 | return; | |
758 | } | |
759 | if (!so) | |
760 | return; | |
761 | if (so->so_is_open_owner) | |
762 | release_last_closed_stateid(openowner(so)); | |
763 | so->so_seqid++; | |
764 | return; | |
765 | } | |
5282fd72 | 766 | |
ec6b5d7b AA |
767 | static void |
768 | gen_sessionid(struct nfsd4_session *ses) | |
769 | { | |
770 | struct nfs4_client *clp = ses->se_client; | |
771 | struct nfsd4_sessionid *sid; | |
772 | ||
773 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
774 | sid->clientid = clp->cl_clientid; | |
775 | sid->sequence = current_sessionid++; | |
776 | sid->reserved = 0; | |
777 | } | |
778 | ||
779 | /* | |
a649637c AA |
780 | * The protocol defines ca_maxresponssize_cached to include the size of |
781 | * the rpc header, but all we need to cache is the data starting after | |
782 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
783 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
784 | * value that is the number of bytes in our cache plus a few additional | |
785 | * bytes. In order to stay on the safe side, and not promise more than | |
786 | * we can cache, those additional bytes must be the minimum possible: 24 | |
787 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
788 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
789 | * for the SEQUENCE op response: | |
790 | */ | |
791 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
792 | ||
557ce264 AA |
793 | static void |
794 | free_session_slots(struct nfsd4_session *ses) | |
795 | { | |
796 | int i; | |
797 | ||
798 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
799 | kfree(ses->se_slots[i]); | |
800 | } | |
801 | ||
a649637c | 802 | /* |
efe0cb6d BF |
803 | * We don't actually need to cache the rpc and session headers, so we |
804 | * can allocate a little less for each slot: | |
805 | */ | |
55c760cf | 806 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 807 | { |
55c760cf | 808 | u32 size; |
ec6b5d7b | 809 | |
55c760cf BF |
810 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
811 | size = 0; | |
812 | else | |
813 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
814 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 815 | } |
ec6b5d7b | 816 | |
5b6feee9 BF |
817 | /* |
818 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 819 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 820 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 821 | */ |
55c760cf | 822 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 823 | { |
55c760cf BF |
824 | u32 slotsize = slot_bytes(ca); |
825 | u32 num = ca->maxreqs; | |
5b6feee9 | 826 | int avail; |
ec6b5d7b | 827 | |
5b6feee9 | 828 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
829 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
830 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
831 | num = min_t(int, num, avail / slotsize); |
832 | nfsd_drc_mem_used += num * slotsize; | |
833 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 834 | |
5b6feee9 BF |
835 | return num; |
836 | } | |
ec6b5d7b | 837 | |
55c760cf | 838 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 839 | { |
55c760cf BF |
840 | int slotsize = slot_bytes(ca); |
841 | ||
4bd9b0f4 | 842 | spin_lock(&nfsd_drc_lock); |
55c760cf | 843 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 844 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 845 | } |
ec6b5d7b | 846 | |
55c760cf | 847 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *attrs) |
5b6feee9 | 848 | { |
55c760cf BF |
849 | int numslots = attrs->maxreqs; |
850 | int slotsize = slot_bytes(attrs); | |
5b6feee9 BF |
851 | struct nfsd4_session *new; |
852 | int mem, i; | |
a649637c | 853 | |
5b6feee9 BF |
854 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
855 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
856 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 857 | |
5b6feee9 BF |
858 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
859 | if (!new) | |
860 | return NULL; | |
557ce264 | 861 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 862 | for (i = 0; i < numslots; i++) { |
55c760cf | 863 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 864 | if (!new->se_slots[i]) |
557ce264 | 865 | goto out_free; |
557ce264 | 866 | } |
5b6feee9 BF |
867 | return new; |
868 | out_free: | |
869 | while (i--) | |
870 | kfree(new->se_slots[i]); | |
871 | kfree(new); | |
872 | return NULL; | |
ec6b5d7b AA |
873 | } |
874 | ||
19cf5c02 BF |
875 | static void free_conn(struct nfsd4_conn *c) |
876 | { | |
877 | svc_xprt_put(c->cn_xprt); | |
878 | kfree(c); | |
879 | } | |
ec6b5d7b | 880 | |
19cf5c02 BF |
881 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
882 | { | |
883 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
884 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 885 | |
19cf5c02 BF |
886 | spin_lock(&clp->cl_lock); |
887 | if (!list_empty(&c->cn_persession)) { | |
888 | list_del(&c->cn_persession); | |
889 | free_conn(c); | |
890 | } | |
eea49806 | 891 | nfsd4_probe_callback(clp); |
2e4b7239 | 892 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 893 | } |
ec6b5d7b | 894 | |
d29c374c | 895 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 896 | { |
c7662518 | 897 | struct nfsd4_conn *conn; |
ec6b5d7b | 898 | |
c7662518 BF |
899 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
900 | if (!conn) | |
db90681d | 901 | return NULL; |
c7662518 BF |
902 | svc_xprt_get(rqstp->rq_xprt); |
903 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 904 | conn->cn_flags = flags; |
db90681d BF |
905 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
906 | return conn; | |
907 | } | |
a649637c | 908 | |
328ead28 BF |
909 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
910 | { | |
911 | conn->cn_session = ses; | |
912 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
913 | } |
914 | ||
db90681d | 915 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 916 | { |
db90681d | 917 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 918 | |
c7662518 | 919 | spin_lock(&clp->cl_lock); |
328ead28 | 920 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 921 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
922 | } |
923 | ||
21b75b01 | 924 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 925 | { |
19cf5c02 | 926 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 927 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
928 | } |
929 | ||
e1ff371f | 930 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 931 | { |
21b75b01 | 932 | int ret; |
ec6b5d7b | 933 | |
db90681d | 934 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
935 | ret = nfsd4_register_conn(conn); |
936 | if (ret) | |
937 | /* oops; xprt is already down: */ | |
938 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 939 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
940 | /* callback channel may be back up */ |
941 | nfsd4_probe_callback(ses->se_client); | |
942 | } | |
c7662518 | 943 | } |
ec6b5d7b | 944 | |
e1ff371f | 945 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
946 | { |
947 | u32 dir = NFS4_CDFC4_FORE; | |
948 | ||
e1ff371f | 949 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 950 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 951 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
952 | } |
953 | ||
954 | /* must be called under client_lock */ | |
19cf5c02 | 955 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 956 | { |
19cf5c02 BF |
957 | struct nfs4_client *clp = s->se_client; |
958 | struct nfsd4_conn *c; | |
ec6b5d7b | 959 | |
19cf5c02 BF |
960 | spin_lock(&clp->cl_lock); |
961 | while (!list_empty(&s->se_conns)) { | |
962 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
963 | list_del_init(&c->cn_persession); | |
964 | spin_unlock(&clp->cl_lock); | |
557ce264 | 965 | |
19cf5c02 BF |
966 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
967 | free_conn(c); | |
ec6b5d7b | 968 | |
19cf5c02 BF |
969 | spin_lock(&clp->cl_lock); |
970 | } | |
971 | spin_unlock(&clp->cl_lock); | |
c7662518 | 972 | } |
ec6b5d7b | 973 | |
1377b69e BF |
974 | static void __free_session(struct nfsd4_session *ses) |
975 | { | |
1377b69e BF |
976 | free_session_slots(ses); |
977 | kfree(ses); | |
978 | } | |
979 | ||
66b2b9b2 | 980 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 981 | { |
66b2b9b2 | 982 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
983 | |
984 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 985 | nfsd4_del_conns(ses); |
55c760cf | 986 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 987 | __free_session(ses); |
c7662518 BF |
988 | } |
989 | ||
135ae827 | 990 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 991 | { |
a827bcb2 | 992 | int idx; |
1872de0e | 993 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 994 | |
ec6b5d7b AA |
995 | new->se_client = clp; |
996 | gen_sessionid(new); | |
ec6b5d7b | 997 | |
c7662518 BF |
998 | INIT_LIST_HEAD(&new->se_conns); |
999 | ||
ac7c46f2 | 1000 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1001 | new->se_flags = cses->flags; |
8b5ce5cd | 1002 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1003 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1004 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1005 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1006 | spin_lock(&nn->client_lock); |
1872de0e | 1007 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1008 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1009 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1010 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1011 | spin_unlock(&nn->client_lock); |
55c760cf BF |
1012 | memcpy(&new->se_fchannel, &cses->fore_channel, |
1013 | sizeof(struct nfsd4_channel_attrs)); | |
dcbeaa68 | 1014 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1015 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1016 | /* |
1017 | * This is a little silly; with sessions there's no real | |
1018 | * use for the callback address. Use the peer address | |
1019 | * as a reasonable default for now, but consider fixing | |
1020 | * the rpc client not to require an address in the | |
1021 | * future: | |
1022 | */ | |
edd76786 BF |
1023 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1024 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1025 | } |
ec6b5d7b AA |
1026 | } |
1027 | ||
9089f1b4 | 1028 | /* caller must hold client_lock */ |
5282fd72 | 1029 | static struct nfsd4_session * |
1872de0e | 1030 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1031 | { |
1032 | struct nfsd4_session *elem; | |
1033 | int idx; | |
1872de0e | 1034 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1035 | |
1036 | dump_sessionid(__func__, sessionid); | |
1037 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1038 | /* Search in the appropriate list */ |
1872de0e | 1039 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1040 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1041 | NFS4_MAX_SESSIONID_LEN)) { | |
1042 | return elem; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | dprintk("%s: session not found\n", __func__); | |
1047 | return NULL; | |
1048 | } | |
1049 | ||
9089f1b4 | 1050 | /* caller must hold client_lock */ |
7116ed6b | 1051 | static void |
5282fd72 | 1052 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1053 | { |
1054 | list_del(&ses->se_hash); | |
4c649378 | 1055 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1056 | list_del(&ses->se_perclnt); |
4c649378 | 1057 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1058 | } |
1059 | ||
1da177e4 LT |
1060 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1061 | static int | |
2c142baa | 1062 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1063 | { |
2c142baa | 1064 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1065 | return 0; |
60adfc50 | 1066 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1067 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1068 | return 1; |
1069 | } | |
1070 | ||
1071 | /* | |
1072 | * XXX Should we use a slab cache ? | |
1073 | * This type of memory management is somewhat inefficient, but we use it | |
1074 | * anyway since SETCLIENTID is not a common operation. | |
1075 | */ | |
35bba9a3 | 1076 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1077 | { |
1078 | struct nfs4_client *clp; | |
1079 | ||
35bba9a3 BF |
1080 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1081 | if (clp == NULL) | |
1082 | return NULL; | |
67114fe6 | 1083 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1084 | if (clp->cl_name.data == NULL) { |
1085 | kfree(clp); | |
1086 | return NULL; | |
1da177e4 | 1087 | } |
35bba9a3 | 1088 | clp->cl_name.len = name.len; |
1da177e4 LT |
1089 | return clp; |
1090 | } | |
1091 | ||
1092 | static inline void | |
1093 | free_client(struct nfs4_client *clp) | |
1094 | { | |
bca0ec65 | 1095 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1096 | |
1097 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1098 | while (!list_empty(&clp->cl_sessions)) { |
1099 | struct nfsd4_session *ses; | |
1100 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1101 | se_perclnt); | |
1102 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1103 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1104 | free_session(ses); | |
792c95dd | 1105 | } |
03a4e1f6 | 1106 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1107 | kfree(clp->cl_name.data); |
2d32b29a | 1108 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1109 | kfree(clp); |
1110 | } | |
1111 | ||
84d38ac9 BH |
1112 | /* must be called under the client_lock */ |
1113 | static inline void | |
1114 | unhash_client_locked(struct nfs4_client *clp) | |
1115 | { | |
792c95dd BF |
1116 | struct nfsd4_session *ses; |
1117 | ||
84d38ac9 | 1118 | list_del(&clp->cl_lru); |
4c649378 | 1119 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1120 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1121 | list_del_init(&ses->se_hash); | |
4c649378 | 1122 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1123 | } |
1124 | ||
1da177e4 | 1125 | static void |
0d22f68f | 1126 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1127 | { |
fe0750e5 | 1128 | struct nfs4_openowner *oo; |
1da177e4 | 1129 | struct nfs4_delegation *dp; |
1da177e4 | 1130 | struct list_head reaplist; |
382a62e7 | 1131 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1132 | |
1da177e4 LT |
1133 | INIT_LIST_HEAD(&reaplist); |
1134 | spin_lock(&recall_lock); | |
ea1da636 N |
1135 | while (!list_empty(&clp->cl_delegations)) { |
1136 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1137 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1138 | list_move(&dp->dl_recall_lru, &reaplist); |
1139 | } | |
1140 | spin_unlock(&recall_lock); | |
1141 | while (!list_empty(&reaplist)) { | |
1142 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 1143 | destroy_delegation(dp); |
1da177e4 | 1144 | } |
ea1da636 | 1145 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1146 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1147 | release_openowner(oo); | |
1da177e4 | 1148 | } |
6ff8da08 | 1149 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1150 | if (clp->cl_cb_conn.cb_xprt) |
1151 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1152 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1153 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1154 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1155 | else |
a99454aa | 1156 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1157 | spin_lock(&nn->client_lock); |
84d38ac9 | 1158 | unhash_client_locked(clp); |
221a6876 BF |
1159 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1160 | free_client(clp); | |
c9a49628 | 1161 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1162 | } |
1163 | ||
0d22f68f BF |
1164 | static void expire_client(struct nfs4_client *clp) |
1165 | { | |
1166 | nfsd4_client_record_remove(clp); | |
1167 | destroy_client(clp); | |
1168 | } | |
1169 | ||
35bba9a3 BF |
1170 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1171 | { | |
1172 | memcpy(target->cl_verifier.data, source->data, | |
1173 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1174 | } |
1175 | ||
35bba9a3 BF |
1176 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1177 | { | |
1da177e4 LT |
1178 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1179 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1180 | } | |
1181 | ||
03a4e1f6 | 1182 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1183 | { |
03a4e1f6 BF |
1184 | if (source->cr_principal) { |
1185 | target->cr_principal = | |
1186 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1187 | if (target->cr_principal == NULL) | |
1188 | return -ENOMEM; | |
1189 | } else | |
1190 | target->cr_principal = NULL; | |
d5497fc6 | 1191 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1192 | target->cr_uid = source->cr_uid; |
1193 | target->cr_gid = source->cr_gid; | |
1194 | target->cr_group_info = source->cr_group_info; | |
1195 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1196 | return 0; |
1da177e4 LT |
1197 | } |
1198 | ||
ac55fdc4 JL |
1199 | static long long |
1200 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1201 | { | |
1202 | long long res; | |
1203 | ||
1204 | res = o1->len - o2->len; | |
1205 | if (res) | |
1206 | return res; | |
1207 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1208 | } | |
1209 | ||
35bba9a3 | 1210 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1211 | { |
a55370a3 | 1212 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1213 | } |
1214 | ||
1215 | static int | |
599e0a22 BF |
1216 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1217 | { | |
1218 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1219 | } |
1220 | ||
1221 | static int | |
599e0a22 BF |
1222 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1223 | { | |
1224 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1225 | } |
1226 | ||
8fbba96e BF |
1227 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1228 | { | |
1229 | int i; | |
1230 | ||
1231 | if (g1->ngroups != g2->ngroups) | |
1232 | return false; | |
1233 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1234 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1235 | return false; |
1236 | return true; | |
1237 | } | |
1238 | ||
68eb3508 BF |
1239 | /* |
1240 | * RFC 3530 language requires clid_inuse be returned when the | |
1241 | * "principal" associated with a requests differs from that previously | |
1242 | * used. We use uid, gid's, and gss principal string as our best | |
1243 | * approximation. We also don't want to allow non-gss use of a client | |
1244 | * established using gss: in theory cr_principal should catch that | |
1245 | * change, but in practice cr_principal can be null even in the gss case | |
1246 | * since gssd doesn't always pass down a principal string. | |
1247 | */ | |
1248 | static bool is_gss_cred(struct svc_cred *cr) | |
1249 | { | |
1250 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1251 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1252 | } | |
1253 | ||
1254 | ||
5559b50a | 1255 | static bool |
599e0a22 BF |
1256 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1257 | { | |
68eb3508 | 1258 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1259 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1260 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1261 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1262 | return false; | |
1263 | if (cr1->cr_principal == cr2->cr_principal) | |
1264 | return true; | |
1265 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1266 | return false; | |
5559b50a | 1267 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1268 | } |
1269 | ||
c212cecf | 1270 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1271 | { |
1272 | static u32 current_clientid = 1; | |
1273 | ||
2c142baa | 1274 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1275 | clp->cl_clientid.cl_id = current_clientid++; |
1276 | } | |
1277 | ||
deda2faa BF |
1278 | static void gen_confirm(struct nfs4_client *clp) |
1279 | { | |
ab4684d1 | 1280 | __be32 verf[2]; |
deda2faa | 1281 | static u32 i; |
1da177e4 | 1282 | |
ab4684d1 CL |
1283 | verf[0] = (__be32)get_seconds(); |
1284 | verf[1] = (__be32)i++; | |
1285 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1286 | } |
1287 | ||
38c2f4b1 | 1288 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1289 | { |
3abdb607 BF |
1290 | struct nfs4_stid *ret; |
1291 | ||
1292 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1293 | if (!ret || !ret->sc_type) | |
1294 | return NULL; | |
1295 | return ret; | |
4d71ab87 BF |
1296 | } |
1297 | ||
38c2f4b1 | 1298 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1299 | { |
1300 | struct nfs4_stid *s; | |
4d71ab87 | 1301 | |
38c2f4b1 | 1302 | s = find_stateid(cl, t); |
4d71ab87 BF |
1303 | if (!s) |
1304 | return NULL; | |
f459e453 | 1305 | if (typemask & s->sc_type) |
4581d140 | 1306 | return s; |
4581d140 BF |
1307 | return NULL; |
1308 | } | |
1309 | ||
2216d449 | 1310 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1311 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1312 | { | |
1313 | struct nfs4_client *clp; | |
1314 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1315 | int ret; |
c212cecf | 1316 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1317 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1318 | |
1319 | clp = alloc_client(name); | |
1320 | if (clp == NULL) | |
1321 | return NULL; | |
1322 | ||
792c95dd | 1323 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1324 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1325 | if (ret) { | |
c9a49628 | 1326 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1327 | free_client(clp); |
c9a49628 | 1328 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1329 | return NULL; |
b09333c4 | 1330 | } |
38c2f4b1 | 1331 | idr_init(&clp->cl_stateids); |
46583e25 | 1332 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1333 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1334 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1335 | INIT_LIST_HEAD(&clp->cl_openowners); |
1336 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1337 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1338 | INIT_LIST_HEAD(&clp->cl_callbacks); |
3bd64a5b | 1339 | INIT_LIST_HEAD(&clp->cl_revoked); |
6ff8da08 | 1340 | spin_lock_init(&clp->cl_lock); |
57725155 | 1341 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1342 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1343 | clear_bit(0, &clp->cl_cb_slot_busy); |
1344 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1345 | copy_verf(clp, verf); | |
1346 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1347 | gen_confirm(clp); |
edd76786 | 1348 | clp->cl_cb_session = NULL; |
c212cecf | 1349 | clp->net = net; |
b09333c4 RL |
1350 | return clp; |
1351 | } | |
1352 | ||
fd39ca9a | 1353 | static void |
ac55fdc4 JL |
1354 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1355 | { | |
1356 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1357 | struct nfs4_client *clp; | |
1358 | ||
1359 | while (*new) { | |
1360 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1361 | parent = *new; | |
1362 | ||
1363 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1364 | new = &((*new)->rb_left); | |
1365 | else | |
1366 | new = &((*new)->rb_right); | |
1367 | } | |
1368 | ||
1369 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1370 | rb_insert_color(&new_clp->cl_namenode, root); | |
1371 | } | |
1372 | ||
1373 | static struct nfs4_client * | |
1374 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1375 | { | |
1376 | long long cmp; | |
1377 | struct rb_node *node = root->rb_node; | |
1378 | struct nfs4_client *clp; | |
1379 | ||
1380 | while (node) { | |
1381 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1382 | cmp = compare_blob(&clp->cl_name, name); | |
1383 | if (cmp > 0) | |
1384 | node = node->rb_left; | |
1385 | else if (cmp < 0) | |
1386 | node = node->rb_right; | |
1387 | else | |
1388 | return clp; | |
1389 | } | |
1390 | return NULL; | |
1391 | } | |
1392 | ||
1393 | static void | |
1394 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1395 | { |
1396 | unsigned int idhashval; | |
0a7ec377 | 1397 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1398 | |
ac55fdc4 | 1399 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1400 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1401 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1402 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1403 | renew_client(clp); |
1da177e4 LT |
1404 | } |
1405 | ||
fd39ca9a | 1406 | static void |
1da177e4 LT |
1407 | move_to_confirmed(struct nfs4_client *clp) |
1408 | { | |
1409 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1410 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1411 | |
1412 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1413 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1414 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1415 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1416 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1417 | renew_client(clp); |
1418 | } | |
1419 | ||
1420 | static struct nfs4_client * | |
bfa85e83 | 1421 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1422 | { |
1423 | struct nfs4_client *clp; | |
1424 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1425 | ||
bfa85e83 | 1426 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1427 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1428 | if ((bool)clp->cl_minorversion != sessions) |
1429 | return NULL; | |
a50d2ad1 | 1430 | renew_client(clp); |
1da177e4 | 1431 | return clp; |
a50d2ad1 | 1432 | } |
1da177e4 LT |
1433 | } |
1434 | return NULL; | |
1435 | } | |
1436 | ||
bfa85e83 BF |
1437 | static struct nfs4_client * |
1438 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1439 | { | |
1440 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1441 | ||
1442 | return find_client_in_id_table(tbl, clid, sessions); | |
1443 | } | |
1444 | ||
1da177e4 | 1445 | static struct nfs4_client * |
0a7ec377 | 1446 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1447 | { |
bfa85e83 | 1448 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1449 | |
bfa85e83 | 1450 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1451 | } |
1452 | ||
6e5f15c9 | 1453 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1454 | { |
6e5f15c9 | 1455 | return clp->cl_exchange_flags != 0; |
e203d506 | 1456 | } |
a1bcecd2 | 1457 | |
28ce6054 | 1458 | static struct nfs4_client * |
382a62e7 | 1459 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1460 | { |
382a62e7 | 1461 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1462 | } |
1463 | ||
1464 | static struct nfs4_client * | |
a99454aa | 1465 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1466 | { |
a99454aa | 1467 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1468 | } |
1469 | ||
fd39ca9a | 1470 | static void |
6f3d772f | 1471 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1472 | { |
07263f1e | 1473 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1474 | struct sockaddr *sa = svc_addr(rqstp); |
1475 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1476 | unsigned short expected_family; |
1477 | ||
1478 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1479 | if (se->se_callback_netid_len == 3 && | |
1480 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1481 | expected_family = AF_INET; | |
1482 | else if (se->se_callback_netid_len == 4 && | |
1483 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1484 | expected_family = AF_INET6; | |
1485 | else | |
1da177e4 LT |
1486 | goto out_err; |
1487 | ||
c212cecf | 1488 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1489 | se->se_callback_addr_len, |
07263f1e BF |
1490 | (struct sockaddr *)&conn->cb_addr, |
1491 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1492 | |
07263f1e | 1493 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1494 | goto out_err; |
aa9a4ec7 | 1495 | |
07263f1e BF |
1496 | if (conn->cb_addr.ss_family == AF_INET6) |
1497 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1498 | |
07263f1e BF |
1499 | conn->cb_prog = se->se_callback_prog; |
1500 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1501 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1502 | return; |
1503 | out_err: | |
07263f1e BF |
1504 | conn->cb_addr.ss_family = AF_UNSPEC; |
1505 | conn->cb_addrlen = 0; | |
849823c5 | 1506 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1507 | "will not receive delegations\n", |
1508 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1509 | ||
1da177e4 LT |
1510 | return; |
1511 | } | |
1512 | ||
074fe897 | 1513 | /* |
557ce264 | 1514 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1515 | */ |
074fe897 AA |
1516 | void |
1517 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1518 | { |
557ce264 AA |
1519 | struct nfsd4_slot *slot = resp->cstate.slot; |
1520 | unsigned int base; | |
074fe897 | 1521 | |
557ce264 | 1522 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1523 | |
557ce264 AA |
1524 | slot->sl_opcnt = resp->opcnt; |
1525 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1526 | |
bf5c43c8 | 1527 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1528 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1529 | slot->sl_datalen = 0; |
bf864a31 | 1530 | return; |
074fe897 | 1531 | } |
557ce264 AA |
1532 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1533 | base = (char *)resp->cstate.datap - | |
1534 | (char *)resp->xbuf->head[0].iov_base; | |
1535 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1536 | slot->sl_datalen)) | |
1537 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1538 | return; | |
074fe897 AA |
1539 | } |
1540 | ||
1541 | /* | |
abfabf8c AA |
1542 | * Encode the replay sequence operation from the slot values. |
1543 | * If cachethis is FALSE encode the uncached rep error on the next | |
1544 | * operation which sets resp->p and increments resp->opcnt for | |
1545 | * nfs4svc_encode_compoundres. | |
074fe897 | 1546 | * |
074fe897 | 1547 | */ |
abfabf8c AA |
1548 | static __be32 |
1549 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1550 | struct nfsd4_compoundres *resp) | |
074fe897 | 1551 | { |
abfabf8c AA |
1552 | struct nfsd4_op *op; |
1553 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1554 | |
abfabf8c AA |
1555 | /* Encode the replayed sequence operation */ |
1556 | op = &args->ops[resp->opcnt - 1]; | |
1557 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1558 | |
abfabf8c | 1559 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1560 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1561 | op = &args->ops[resp->opcnt++]; |
1562 | op->status = nfserr_retry_uncached_rep; | |
1563 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1564 | } |
abfabf8c | 1565 | return op->status; |
074fe897 AA |
1566 | } |
1567 | ||
1568 | /* | |
557ce264 AA |
1569 | * The sequence operation is not cached because we can use the slot and |
1570 | * session values. | |
074fe897 AA |
1571 | */ |
1572 | __be32 | |
bf864a31 AA |
1573 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1574 | struct nfsd4_sequence *seq) | |
074fe897 | 1575 | { |
557ce264 | 1576 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1577 | __be32 status; |
1578 | ||
557ce264 | 1579 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1580 | |
abfabf8c AA |
1581 | /* Either returns 0 or nfserr_retry_uncached */ |
1582 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1583 | if (status == nfserr_retry_uncached_rep) | |
1584 | return status; | |
074fe897 | 1585 | |
557ce264 AA |
1586 | /* The sequence operation has been encoded, cstate->datap set. */ |
1587 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1588 | |
557ce264 AA |
1589 | resp->opcnt = slot->sl_opcnt; |
1590 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1591 | status = slot->sl_status; | |
074fe897 AA |
1592 | |
1593 | return status; | |
1594 | } | |
1595 | ||
0733d213 AA |
1596 | /* |
1597 | * Set the exchange_id flags returned by the server. | |
1598 | */ | |
1599 | static void | |
1600 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1601 | { | |
1602 | /* pNFS is not supported */ | |
1603 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1604 | ||
1605 | /* Referrals are supported, Migration is not. */ | |
1606 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1607 | ||
1608 | /* set the wire flags to return to client. */ | |
1609 | clid->flags = new->cl_exchange_flags; | |
1610 | } | |
1611 | ||
631fc9ea BF |
1612 | static bool client_has_state(struct nfs4_client *clp) |
1613 | { | |
1614 | /* | |
1615 | * Note clp->cl_openowners check isn't quite right: there's no | |
1616 | * need to count owners without stateid's. | |
1617 | * | |
1618 | * Also note we should probably be using this in 4.0 case too. | |
1619 | */ | |
6eccece9 BF |
1620 | return !list_empty(&clp->cl_openowners) |
1621 | || !list_empty(&clp->cl_delegations) | |
1622 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1623 | } |
1624 | ||
069b6ad4 AA |
1625 | __be32 |
1626 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1627 | struct nfsd4_compound_state *cstate, | |
1628 | struct nfsd4_exchange_id *exid) | |
1629 | { | |
0733d213 | 1630 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1631 | __be32 status; |
363168b4 | 1632 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1633 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1634 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1635 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1636 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1637 | |
363168b4 | 1638 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1639 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1640 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1641 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1642 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1643 | |
a084daf5 | 1644 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1645 | return nfserr_inval; |
1646 | ||
1647 | /* Currently only support SP4_NONE */ | |
1648 | switch (exid->spa_how) { | |
1649 | case SP4_NONE: | |
1650 | break; | |
063b0fb9 BF |
1651 | default: /* checked by xdr code */ |
1652 | WARN_ON_ONCE(1); | |
0733d213 | 1653 | case SP4_SSV: |
0733d213 AA |
1654 | case SP4_MACH_CRED: |
1655 | return nfserr_serverfault; /* no excuse :-/ */ | |
1656 | } | |
1657 | ||
2dbb269d | 1658 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1659 | nfs4_lock_state(); |
382a62e7 | 1660 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1661 | if (conf) { |
83e08fd4 BF |
1662 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1663 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1664 | ||
136e658d BF |
1665 | if (update) { |
1666 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1667 | status = nfserr_inval; |
1a308118 BF |
1668 | goto out; |
1669 | } | |
136e658d | 1670 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1671 | status = nfserr_perm; |
136e658d BF |
1672 | goto out; |
1673 | } | |
1674 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1675 | status = nfserr_not_same; |
1676 | goto out; | |
1677 | } | |
136e658d BF |
1678 | /* case 6 */ |
1679 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1680 | new = conf; | |
1681 | goto out_copy; | |
0733d213 | 1682 | } |
136e658d | 1683 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1684 | if (client_has_state(conf)) { |
1685 | status = nfserr_clid_inuse; | |
0733d213 AA |
1686 | goto out; |
1687 | } | |
1688 | expire_client(conf); | |
1689 | goto out_new; | |
1690 | } | |
136e658d | 1691 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1692 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1693 | new = conf; |
1694 | goto out_copy; | |
1695 | } | |
1696 | /* case 5, client reboot */ | |
136e658d | 1697 | goto out_new; |
6ddbbbfe MS |
1698 | } |
1699 | ||
2dbb269d | 1700 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1701 | status = nfserr_noent; |
1702 | goto out; | |
0733d213 AA |
1703 | } |
1704 | ||
a99454aa | 1705 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1706 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1707 | expire_client(unconf); |
0733d213 | 1708 | |
2dbb269d | 1709 | /* case 1 (normal case) */ |
0733d213 | 1710 | out_new: |
2216d449 | 1711 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1712 | if (new == NULL) { |
4731030d | 1713 | status = nfserr_jukebox; |
0733d213 AA |
1714 | goto out; |
1715 | } | |
c116a0af | 1716 | new->cl_minorversion = 1; |
0733d213 | 1717 | |
c212cecf | 1718 | gen_clid(new, nn); |
ac55fdc4 | 1719 | add_to_unconfirmed(new); |
0733d213 AA |
1720 | out_copy: |
1721 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1722 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1723 | ||
778df3f0 | 1724 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1725 | nfsd4_set_ex_flags(new, exid); |
1726 | ||
1727 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1728 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1729 | status = nfs_ok; |
1730 | ||
1731 | out: | |
1732 | nfs4_unlock_state(); | |
0733d213 | 1733 | return status; |
069b6ad4 AA |
1734 | } |
1735 | ||
57b7b43b | 1736 | static __be32 |
88e588d5 | 1737 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1738 | { |
88e588d5 AA |
1739 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1740 | slot_seqid); | |
b85d4c01 BH |
1741 | |
1742 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1743 | if (slot_inuse) { |
1744 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1745 | return nfserr_jukebox; |
1746 | else | |
1747 | return nfserr_seq_misordered; | |
1748 | } | |
f6d82485 | 1749 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1750 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1751 | return nfs_ok; |
88e588d5 | 1752 | if (seqid == slot_seqid) |
b85d4c01 | 1753 | return nfserr_replay_cache; |
b85d4c01 BH |
1754 | return nfserr_seq_misordered; |
1755 | } | |
1756 | ||
49557cc7 AA |
1757 | /* |
1758 | * Cache the create session result into the create session single DRC | |
1759 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1760 | * Do this for solo or embedded create session operations. | |
1761 | */ | |
1762 | static void | |
1763 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1764 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1765 | { |
1766 | slot->sl_status = nfserr; | |
1767 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1768 | } | |
1769 | ||
1770 | static __be32 | |
1771 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1772 | struct nfsd4_clid_slot *slot) | |
1773 | { | |
1774 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1775 | return slot->sl_status; | |
1776 | } | |
1777 | ||
1b74c25b MJ |
1778 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1779 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1780 | 1 + /* MIN tag is length with zero, only length */ \ | |
1781 | 3 + /* version, opcount, opcode */ \ | |
1782 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1783 | /* seqid, slotID, slotID, cache */ \ | |
1784 | 4 ) * sizeof(__be32)) | |
1785 | ||
1786 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1787 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1788 | 1 + /* status */ \ | |
1789 | 1 + /* MIN tag is length with zero, only length */ \ | |
1790 | 3 + /* opcount, opcode, opstatus*/ \ | |
1791 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1792 | /* seqid, slotID, slotID, slotID, status */ \ | |
1793 | 5 ) * sizeof(__be32)) | |
1794 | ||
55c760cf | 1795 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 1796 | { |
55c760cf BF |
1797 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
1798 | ||
373cd409 BF |
1799 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
1800 | return nfserr_toosmall; | |
1801 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
1802 | return nfserr_toosmall; | |
55c760cf BF |
1803 | ca->headerpadsz = 0; |
1804 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
1805 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
1806 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
1807 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
1808 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
1809 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
1810 | /* | |
1811 | * Note decreasing slot size below client's request may make it | |
1812 | * difficult for client to function correctly, whereas | |
1813 | * decreasing the number of slots will (just?) affect | |
1814 | * performance. When short on memory we therefore prefer to | |
1815 | * decrease number of slots instead of their size. Clients that | |
1816 | * request larger slots than they need will get poor results: | |
1817 | */ | |
1818 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
1819 | if (!ca->maxreqs) | |
1820 | return nfserr_jukebox; | |
1821 | ||
373cd409 | 1822 | return nfs_ok; |
1b74c25b MJ |
1823 | } |
1824 | ||
06b332a5 BF |
1825 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1826 | { | |
1827 | ca->headerpadsz = 0; | |
1828 | ||
1829 | /* | |
1830 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
1831 | * don't even do gss on the backchannel yet. But this is still | |
1832 | * less than 1k. Tighten up this estimate in the unlikely event | |
1833 | * it turns out to be a problem for some client: | |
1834 | */ | |
1835 | if (ca->maxreq_sz < NFS4_enc_cb_recall_sz + RPC_MAX_HEADER_WITH_AUTH) | |
1836 | return nfserr_toosmall; | |
1837 | if (ca->maxresp_sz < NFS4_dec_cb_recall_sz + RPC_MAX_REPHEADER_WITH_AUTH) | |
1838 | return nfserr_toosmall; | |
1839 | ca->maxresp_cached = 0; | |
1840 | if (ca->maxops < 2) | |
1841 | return nfserr_toosmall; | |
1842 | ||
1843 | return nfs_ok; | |
1844 | } | |
1845 | ||
069b6ad4 AA |
1846 | __be32 |
1847 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1848 | struct nfsd4_compound_state *cstate, | |
1849 | struct nfsd4_create_session *cr_ses) | |
1850 | { | |
363168b4 | 1851 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1852 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1853 | struct nfsd4_session *new; |
81f0b2a4 | 1854 | struct nfsd4_conn *conn; |
49557cc7 | 1855 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1856 | __be32 status = 0; |
8daae4dc | 1857 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 1858 | |
a62573dc MJ |
1859 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1860 | return nfserr_inval; | |
55c760cf | 1861 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
1862 | if (status) |
1863 | return status; | |
1864 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 BF |
1865 | if (status) |
1866 | return status; | |
81f0b2a4 | 1867 | status = nfserr_jukebox; |
55c760cf BF |
1868 | new = alloc_session(&cr_ses->fore_channel); |
1869 | if (!new) | |
1870 | goto out_release_drc_mem; | |
81f0b2a4 BF |
1871 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
1872 | if (!conn) | |
1873 | goto out_free_session; | |
a62573dc | 1874 | |
ec6b5d7b | 1875 | nfs4_lock_state(); |
0a7ec377 | 1876 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 1877 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 1878 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
1879 | |
1880 | if (conf) { | |
49557cc7 AA |
1881 | cs_slot = &conf->cl_cs_slot; |
1882 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1883 | if (status == nfserr_replay_cache) { |
49557cc7 | 1884 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1885 | goto out_free_conn; |
49557cc7 | 1886 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1887 | status = nfserr_seq_misordered; |
81f0b2a4 | 1888 | goto out_free_conn; |
ec6b5d7b | 1889 | } |
ec6b5d7b | 1890 | } else if (unconf) { |
8f9d3d3b | 1891 | struct nfs4_client *old; |
ec6b5d7b | 1892 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1893 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1894 | status = nfserr_clid_inuse; |
81f0b2a4 | 1895 | goto out_free_conn; |
ec6b5d7b | 1896 | } |
49557cc7 AA |
1897 | cs_slot = &unconf->cl_cs_slot; |
1898 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1899 | if (status) { |
1900 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1901 | status = nfserr_seq_misordered; |
81f0b2a4 | 1902 | goto out_free_conn; |
ec6b5d7b | 1903 | } |
382a62e7 | 1904 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
1905 | if (old) { |
1906 | status = mark_client_expired(old); | |
1907 | if (status) | |
1908 | goto out_free_conn; | |
8f9d3d3b | 1909 | expire_client(old); |
221a6876 | 1910 | } |
8f9d3d3b | 1911 | move_to_confirmed(unconf); |
ec6b5d7b AA |
1912 | conf = unconf; |
1913 | } else { | |
1914 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1915 | goto out_free_conn; |
ec6b5d7b | 1916 | } |
81f0b2a4 | 1917 | status = nfs_ok; |
408b79bc BF |
1918 | /* |
1919 | * We do not support RDMA or persistent sessions | |
1920 | */ | |
1921 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1922 | cr_ses->flags &= ~SESSION4_RDMA; | |
1923 | ||
81f0b2a4 BF |
1924 | init_session(rqstp, new, conf, cr_ses); |
1925 | nfsd4_init_conn(rqstp, conn, new); | |
1926 | ||
ac7c46f2 | 1927 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1928 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 1929 | cs_slot->sl_seqid++; |
49557cc7 | 1930 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1931 | |
49557cc7 AA |
1932 | /* cache solo and embedded create sessions under the state lock */ |
1933 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 1934 | nfs4_unlock_state(); |
ec6b5d7b | 1935 | return status; |
81f0b2a4 | 1936 | out_free_conn: |
266533c6 | 1937 | nfs4_unlock_state(); |
81f0b2a4 BF |
1938 | free_conn(conn); |
1939 | out_free_session: | |
1940 | __free_session(new); | |
55c760cf BF |
1941 | out_release_drc_mem: |
1942 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 1943 | return status; |
069b6ad4 AA |
1944 | } |
1945 | ||
1d1bc8f2 BF |
1946 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1947 | { | |
1948 | switch (*dir) { | |
1949 | case NFS4_CDFC4_FORE: | |
1950 | case NFS4_CDFC4_BACK: | |
1951 | return nfs_ok; | |
1952 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1953 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1954 | *dir = NFS4_CDFC4_BOTH; | |
1955 | return nfs_ok; | |
1956 | }; | |
1957 | return nfserr_inval; | |
1958 | } | |
1959 | ||
cb73a9f4 BF |
1960 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
1961 | { | |
1962 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 1963 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
cb73a9f4 | 1964 | |
c9a49628 | 1965 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
1966 | session->se_cb_prog = bc->bc_cb_program; |
1967 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 1968 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
1969 | |
1970 | nfsd4_probe_callback(session->se_client); | |
1971 | ||
1972 | return nfs_ok; | |
1973 | } | |
1974 | ||
1d1bc8f2 BF |
1975 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
1976 | struct nfsd4_compound_state *cstate, | |
1977 | struct nfsd4_bind_conn_to_session *bcts) | |
1978 | { | |
1979 | __be32 status; | |
3ba63671 | 1980 | struct nfsd4_conn *conn; |
4f6e6c17 | 1981 | struct nfsd4_session *session; |
c9a49628 | 1982 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1d1bc8f2 BF |
1983 | |
1984 | if (!nfsd4_last_compound_op(rqstp)) | |
1985 | return nfserr_not_only_op; | |
4f6e6c17 | 1986 | nfs4_lock_state(); |
c9a49628 | 1987 | spin_lock(&nn->client_lock); |
4f6e6c17 | 1988 | session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
c9a49628 | 1989 | spin_unlock(&nn->client_lock); |
4f6e6c17 BF |
1990 | status = nfserr_badsession; |
1991 | if (!session) | |
1992 | goto out; | |
1d1bc8f2 | 1993 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 1994 | if (status) |
4f6e6c17 | 1995 | goto out; |
3ba63671 | 1996 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 1997 | status = nfserr_jukebox; |
3ba63671 | 1998 | if (!conn) |
4f6e6c17 BF |
1999 | goto out; |
2000 | nfsd4_init_conn(rqstp, conn, session); | |
2001 | status = nfs_ok; | |
2002 | out: | |
2003 | nfs4_unlock_state(); | |
2004 | return status; | |
1d1bc8f2 BF |
2005 | } |
2006 | ||
5d4cec2f BF |
2007 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2008 | { | |
2009 | if (!session) | |
2010 | return 0; | |
2011 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2012 | } | |
2013 | ||
069b6ad4 AA |
2014 | __be32 |
2015 | nfsd4_destroy_session(struct svc_rqst *r, | |
2016 | struct nfsd4_compound_state *cstate, | |
2017 | struct nfsd4_destroy_session *sessionid) | |
2018 | { | |
e10e0cfc | 2019 | struct nfsd4_session *ses; |
abcdff09 | 2020 | __be32 status; |
c9a49628 | 2021 | struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); |
e10e0cfc | 2022 | |
abcdff09 BF |
2023 | nfs4_lock_state(); |
2024 | status = nfserr_not_only_op; | |
5d4cec2f | 2025 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2026 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2027 | goto out; |
57716355 | 2028 | } |
e10e0cfc | 2029 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2030 | spin_lock(&nn->client_lock); |
1872de0e | 2031 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
abcdff09 BF |
2032 | status = nfserr_badsession; |
2033 | if (!ses) | |
2034 | goto out_client_lock; | |
66b2b9b2 BF |
2035 | status = mark_session_dead_locked(ses); |
2036 | if (status) | |
2037 | goto out_client_lock; | |
e10e0cfc | 2038 | unhash_session(ses); |
c9a49628 | 2039 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2040 | |
84f5f7cc | 2041 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2042 | |
c9a49628 | 2043 | spin_lock(&nn->client_lock); |
66b2b9b2 | 2044 | free_session(ses); |
e10e0cfc | 2045 | status = nfs_ok; |
abcdff09 BF |
2046 | out_client_lock: |
2047 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2048 | out: |
abcdff09 | 2049 | nfs4_unlock_state(); |
e10e0cfc | 2050 | return status; |
069b6ad4 AA |
2051 | } |
2052 | ||
a663bdd8 | 2053 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2054 | { |
2055 | struct nfsd4_conn *c; | |
2056 | ||
2057 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2058 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2059 | return c; |
2060 | } | |
2061 | } | |
2062 | return NULL; | |
2063 | } | |
2064 | ||
a663bdd8 | 2065 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2066 | { |
2067 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2068 | struct nfsd4_conn *c; |
21b75b01 | 2069 | int ret; |
328ead28 BF |
2070 | |
2071 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2072 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
2073 | if (c) { |
2074 | spin_unlock(&clp->cl_lock); | |
2075 | free_conn(new); | |
2076 | return; | |
2077 | } | |
2078 | __nfsd4_hash_conn(new, ses); | |
2079 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2080 | ret = nfsd4_register_conn(new); |
2081 | if (ret) | |
2082 | /* oops; xprt is already down: */ | |
2083 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
2084 | return; |
2085 | } | |
2086 | ||
868b89c3 MJ |
2087 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2088 | { | |
2089 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2090 | ||
2091 | return args->opcnt > session->se_fchannel.maxops; | |
2092 | } | |
2093 | ||
ae82a8d0 MJ |
2094 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2095 | struct nfsd4_session *session) | |
2096 | { | |
2097 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2098 | ||
2099 | return xb->len > session->se_fchannel.maxreq_sz; | |
2100 | } | |
2101 | ||
069b6ad4 | 2102 | __be32 |
b85d4c01 | 2103 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2104 | struct nfsd4_compound_state *cstate, |
2105 | struct nfsd4_sequence *seq) | |
2106 | { | |
f9bb94c4 | 2107 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 | 2108 | struct nfsd4_session *session; |
221a6876 | 2109 | struct nfs4_client *clp; |
b85d4c01 | 2110 | struct nfsd4_slot *slot; |
a663bdd8 | 2111 | struct nfsd4_conn *conn; |
57b7b43b | 2112 | __be32 status; |
c9a49628 | 2113 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b85d4c01 | 2114 | |
f9bb94c4 AA |
2115 | if (resp->opcnt != 1) |
2116 | return nfserr_sequence_pos; | |
2117 | ||
a663bdd8 BF |
2118 | /* |
2119 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2120 | * below. | |
2121 | */ | |
2122 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2123 | if (!conn) | |
2124 | return nfserr_jukebox; | |
2125 | ||
c9a49628 | 2126 | spin_lock(&nn->client_lock); |
b85d4c01 | 2127 | status = nfserr_badsession; |
1872de0e | 2128 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
b85d4c01 | 2129 | if (!session) |
221a6876 BF |
2130 | goto out_no_session; |
2131 | clp = session->se_client; | |
2132 | status = get_client_locked(clp); | |
2133 | if (status) | |
2134 | goto out_no_session; | |
66b2b9b2 BF |
2135 | status = nfsd4_get_session_locked(session); |
2136 | if (status) | |
2137 | goto out_put_client; | |
b85d4c01 | 2138 | |
868b89c3 MJ |
2139 | status = nfserr_too_many_ops; |
2140 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2141 | goto out_put_session; |
868b89c3 | 2142 | |
ae82a8d0 MJ |
2143 | status = nfserr_req_too_big; |
2144 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2145 | goto out_put_session; |
ae82a8d0 | 2146 | |
b85d4c01 | 2147 | status = nfserr_badslot; |
6c18ba9f | 2148 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2149 | goto out_put_session; |
b85d4c01 | 2150 | |
557ce264 | 2151 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2152 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2153 | ||
a8dfdaeb AA |
2154 | /* We do not negotiate the number of slots yet, so set the |
2155 | * maxslots to the session maxreqs which is used to encode | |
2156 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2157 | seq->maxslots = session->se_fchannel.maxreqs; | |
2158 | ||
73e79482 BF |
2159 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2160 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2161 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2162 | status = nfserr_seq_misordered; |
2163 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2164 | goto out_put_session; |
b85d4c01 BH |
2165 | cstate->slot = slot; |
2166 | cstate->session = session; | |
da3846a2 | 2167 | /* Return the cached reply status and set cstate->status |
557ce264 | 2168 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2169 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2170 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2171 | goto out; |
b85d4c01 BH |
2172 | } |
2173 | if (status) | |
66b2b9b2 | 2174 | goto out_put_session; |
b85d4c01 | 2175 | |
a663bdd8 BF |
2176 | nfsd4_sequence_check_conn(conn, session); |
2177 | conn = NULL; | |
328ead28 | 2178 | |
b85d4c01 | 2179 | /* Success! bump slot seqid */ |
b85d4c01 | 2180 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2181 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2182 | if (seq->cachethis) |
2183 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2184 | else |
2185 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2186 | |
2187 | cstate->slot = slot; | |
2188 | cstate->session = session; | |
2189 | ||
b85d4c01 | 2190 | out: |
221a6876 BF |
2191 | switch (clp->cl_cb_state) { |
2192 | case NFSD4_CB_DOWN: | |
2193 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2194 | break; | |
2195 | case NFSD4_CB_FAULT: | |
2196 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2197 | break; | |
2198 | default: | |
2199 | seq->status_flags = 0; | |
aaf84eb9 | 2200 | } |
3bd64a5b BF |
2201 | if (!list_empty(&clp->cl_revoked)) |
2202 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2203 | out_no_session: |
a663bdd8 | 2204 | kfree(conn); |
c9a49628 | 2205 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2206 | return status; |
66b2b9b2 BF |
2207 | out_put_session: |
2208 | nfsd4_put_session(session); | |
221a6876 BF |
2209 | out_put_client: |
2210 | put_client_renew_locked(clp); | |
2211 | goto out_no_session; | |
069b6ad4 AA |
2212 | } |
2213 | ||
345c2842 MJ |
2214 | __be32 |
2215 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2216 | { | |
2217 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2218 | __be32 status = 0; |
8daae4dc | 2219 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2220 | |
2221 | nfs4_lock_state(); | |
0a7ec377 | 2222 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2223 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2224 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2225 | |
2226 | if (conf) { | |
2227 | clp = conf; | |
2228 | ||
c0293b01 | 2229 | if (client_has_state(conf)) { |
345c2842 MJ |
2230 | status = nfserr_clientid_busy; |
2231 | goto out; | |
2232 | } | |
2233 | } else if (unconf) | |
2234 | clp = unconf; | |
2235 | else { | |
2236 | status = nfserr_stale_clientid; | |
2237 | goto out; | |
2238 | } | |
2239 | ||
2240 | expire_client(clp); | |
2241 | out: | |
2242 | nfs4_unlock_state(); | |
345c2842 MJ |
2243 | return status; |
2244 | } | |
2245 | ||
4dc6ec00 BF |
2246 | __be32 |
2247 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2248 | { | |
57b7b43b | 2249 | __be32 status = 0; |
bcecf1cc | 2250 | |
4dc6ec00 BF |
2251 | if (rc->rca_one_fs) { |
2252 | if (!cstate->current_fh.fh_dentry) | |
2253 | return nfserr_nofilehandle; | |
2254 | /* | |
2255 | * We don't take advantage of the rca_one_fs case. | |
2256 | * That's OK, it's optional, we can safely ignore it. | |
2257 | */ | |
2258 | return nfs_ok; | |
2259 | } | |
bcecf1cc | 2260 | |
4dc6ec00 | 2261 | nfs4_lock_state(); |
bcecf1cc | 2262 | status = nfserr_complete_already; |
a52d726b JL |
2263 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2264 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2265 | goto out; |
2266 | ||
2267 | status = nfserr_stale_clientid; | |
2268 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2269 | /* |
2270 | * The following error isn't really legal. | |
2271 | * But we only get here if the client just explicitly | |
2272 | * destroyed the client. Surely it no longer cares what | |
2273 | * error it gets back on an operation for the dead | |
2274 | * client. | |
2275 | */ | |
bcecf1cc MJ |
2276 | goto out; |
2277 | ||
2278 | status = nfs_ok; | |
2a4317c5 | 2279 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2280 | out: |
4dc6ec00 | 2281 | nfs4_unlock_state(); |
bcecf1cc | 2282 | return status; |
4dc6ec00 BF |
2283 | } |
2284 | ||
b37ad28b | 2285 | __be32 |
b591480b BF |
2286 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2287 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2288 | { |
a084daf5 | 2289 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2290 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2291 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2292 | __be32 status; |
c212cecf SK |
2293 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2294 | ||
63db4632 | 2295 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2296 | nfs4_lock_state(); |
382a62e7 | 2297 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2298 | if (conf) { |
63db4632 | 2299 | /* case 0: */ |
1da177e4 | 2300 | status = nfserr_clid_inuse; |
e203d506 BF |
2301 | if (clp_used_exchangeid(conf)) |
2302 | goto out; | |
026722c2 | 2303 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2304 | char addr_str[INET6_ADDRSTRLEN]; |
2305 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2306 | sizeof(addr_str)); | |
2307 | dprintk("NFSD: setclientid: string in use by client " | |
2308 | "at %s\n", addr_str); | |
1da177e4 LT |
2309 | goto out; |
2310 | } | |
1da177e4 | 2311 | } |
a99454aa | 2312 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2313 | if (unconf) |
2314 | expire_client(unconf); | |
3e772463 | 2315 | status = nfserr_jukebox; |
2216d449 | 2316 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2317 | if (new == NULL) |
2318 | goto out; | |
34b232bb | 2319 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2320 | /* case 1: probable callback update */ |
1da177e4 | 2321 | copy_clid(new, conf); |
34b232bb | 2322 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2323 | gen_clid(new, nn); |
8323c3b2 | 2324 | new->cl_minorversion = 0; |
6f3d772f | 2325 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2326 | add_to_unconfirmed(new); |
1da177e4 LT |
2327 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2328 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2329 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2330 | status = nfs_ok; | |
2331 | out: | |
2332 | nfs4_unlock_state(); | |
2333 | return status; | |
2334 | } | |
2335 | ||
2336 | ||
b37ad28b | 2337 | __be32 |
b591480b BF |
2338 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2339 | struct nfsd4_compound_state *cstate, | |
2340 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2341 | { |
21ab45a4 | 2342 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2343 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2344 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2345 | __be32 status; |
7f2210fa | 2346 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2347 | |
2c142baa | 2348 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2349 | return nfserr_stale_clientid; |
1da177e4 | 2350 | nfs4_lock_state(); |
21ab45a4 | 2351 | |
8daae4dc | 2352 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2353 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2354 | /* |
8695b90a BF |
2355 | * We try hard to give out unique clientid's, so if we get an |
2356 | * attempt to confirm the same clientid with a different cred, | |
2357 | * there's a bug somewhere. Let's charitably assume it's our | |
2358 | * bug. | |
a186e767 | 2359 | */ |
8695b90a BF |
2360 | status = nfserr_serverfault; |
2361 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2362 | goto out; | |
2363 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2364 | goto out; | |
63db4632 | 2365 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2366 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2367 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2368 | status = nfs_ok; |
90d700b7 BF |
2369 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2370 | status = nfserr_stale_clientid; | |
2371 | goto out; | |
2372 | } | |
2373 | status = nfs_ok; | |
2374 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2375 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2376 | nfsd4_probe_callback(conf); | |
2377 | expire_client(unconf); | |
90d700b7 | 2378 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2379 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2380 | if (conf) { |
2381 | status = mark_client_expired(conf); | |
2382 | if (status) | |
2383 | goto out; | |
8695b90a | 2384 | expire_client(conf); |
221a6876 | 2385 | } |
8695b90a | 2386 | move_to_confirmed(unconf); |
f3d03b92 | 2387 | nfsd4_probe_callback(unconf); |
08e8987c | 2388 | } |
1da177e4 | 2389 | out: |
1da177e4 LT |
2390 | nfs4_unlock_state(); |
2391 | return status; | |
2392 | } | |
2393 | ||
32513b40 BF |
2394 | static struct nfs4_file *nfsd4_alloc_file(void) |
2395 | { | |
2396 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2397 | } | |
2398 | ||
1da177e4 | 2399 | /* OPEN Share state helper functions */ |
32513b40 | 2400 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2401 | { |
1da177e4 LT |
2402 | unsigned int hashval = file_hashval(ino); |
2403 | ||
32513b40 | 2404 | atomic_set(&fp->fi_ref, 1); |
32513b40 BF |
2405 | INIT_LIST_HEAD(&fp->fi_stateids); |
2406 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2407 | fp->fi_inode = igrab(ino); | |
2408 | fp->fi_had_conflict = false; | |
2409 | fp->fi_lease = NULL; | |
2410 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2411 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2412 | spin_lock(&recall_lock); | |
89876f8c | 2413 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
32513b40 | 2414 | spin_unlock(&recall_lock); |
1da177e4 LT |
2415 | } |
2416 | ||
e60d4398 | 2417 | static void |
e18b890b | 2418 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2419 | { |
e60d4398 N |
2420 | if (*slab == NULL) |
2421 | return; | |
1a1d92c1 | 2422 | kmem_cache_destroy(*slab); |
e60d4398 | 2423 | *slab = NULL; |
1da177e4 LT |
2424 | } |
2425 | ||
e8ff2a84 | 2426 | void |
1da177e4 LT |
2427 | nfsd4_free_slabs(void) |
2428 | { | |
fe0750e5 BF |
2429 | nfsd4_free_slab(&openowner_slab); |
2430 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2431 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2432 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2433 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2434 | } |
1da177e4 | 2435 | |
72083396 | 2436 | int |
e60d4398 N |
2437 | nfsd4_init_slabs(void) |
2438 | { | |
fe0750e5 BF |
2439 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2440 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2441 | if (openowner_slab == NULL) | |
2442 | goto out_nomem; | |
2443 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2444 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2445 | if (lockowner_slab == NULL) |
e60d4398 N |
2446 | goto out_nomem; |
2447 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2448 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2449 | if (file_slab == NULL) |
2450 | goto out_nomem; | |
5ac049ac | 2451 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2452 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2453 | if (stateid_slab == NULL) |
2454 | goto out_nomem; | |
5b2d21c1 | 2455 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2456 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2457 | if (deleg_slab == NULL) |
2458 | goto out_nomem; | |
e60d4398 N |
2459 | return 0; |
2460 | out_nomem: | |
2461 | nfsd4_free_slabs(); | |
2462 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2463 | return -ENOMEM; | |
1da177e4 LT |
2464 | } |
2465 | ||
fe0750e5 BF |
2466 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2467 | { | |
2468 | kfree(oo->oo_owner.so_owner.data); | |
2469 | kmem_cache_free(openowner_slab, oo); | |
2470 | } | |
2471 | ||
2472 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2473 | { |
fe0750e5 BF |
2474 | kfree(lo->lo_owner.so_owner.data); |
2475 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2476 | } |
2477 | ||
ff194bd9 | 2478 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2479 | { |
ff194bd9 BF |
2480 | rp->rp_status = nfserr_serverfault; |
2481 | rp->rp_buflen = 0; | |
2482 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2483 | } |
2484 | ||
fe0750e5 | 2485 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2486 | { |
1da177e4 | 2487 | struct nfs4_stateowner *sop; |
1da177e4 | 2488 | |
fe0750e5 | 2489 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2490 | if (!sop) |
2491 | return NULL; | |
2492 | ||
2493 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2494 | if (!sop->so_owner.data) { | |
fe0750e5 | 2495 | kmem_cache_free(slab, sop); |
1da177e4 | 2496 | return NULL; |
ff194bd9 BF |
2497 | } |
2498 | sop->so_owner.len = owner->len; | |
2499 | ||
ea1da636 | 2500 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2501 | sop->so_client = clp; |
2502 | init_nfs4_replay(&sop->so_replay); | |
2503 | return sop; | |
2504 | } | |
2505 | ||
fe0750e5 | 2506 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2507 | { |
9b531137 SK |
2508 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2509 | ||
2510 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2511 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2512 | } |
2513 | ||
fe0750e5 | 2514 | static struct nfs4_openowner * |
ff194bd9 | 2515 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2516 | struct nfs4_openowner *oo; |
ff194bd9 | 2517 | |
fe0750e5 BF |
2518 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2519 | if (!oo) | |
ff194bd9 | 2520 | return NULL; |
fe0750e5 BF |
2521 | oo->oo_owner.so_is_open_owner = 1; |
2522 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2523 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2524 | oo->oo_time = 0; |
38c387b5 | 2525 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2526 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2527 | hash_openowner(oo, clp, strhashval); | |
2528 | return oo; | |
1da177e4 LT |
2529 | } |
2530 | ||
996e0938 | 2531 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2532 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2533 | |
3abdb607 | 2534 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
ea1da636 | 2535 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2536 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2537 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2538 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2539 | get_nfs4_file(fp); |
1da177e4 | 2540 | stp->st_file = fp; |
1da177e4 LT |
2541 | stp->st_access_bmap = 0; |
2542 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2543 | set_access(open->op_share_access, stp); |
ce0fc43c | 2544 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2545 | stp->st_openstp = NULL; |
1da177e4 LT |
2546 | } |
2547 | ||
fd39ca9a | 2548 | static void |
73758fed | 2549 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2550 | { |
73758fed SK |
2551 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2552 | ||
fe0750e5 | 2553 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2554 | |
73758fed | 2555 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2556 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2557 | } |
2558 | ||
1da177e4 | 2559 | static int |
599e0a22 BF |
2560 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2561 | clientid_t *clid) | |
2562 | { | |
2563 | return (sop->so_owner.len == owner->len) && | |
2564 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2565 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2566 | } |
2567 | ||
fe0750e5 | 2568 | static struct nfs4_openowner * |
9b531137 SK |
2569 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2570 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2571 | { |
a50d2ad1 BF |
2572 | struct nfs4_stateowner *so; |
2573 | struct nfs4_openowner *oo; | |
d15c077e | 2574 | struct nfs4_client *clp; |
1da177e4 | 2575 | |
9b531137 | 2576 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2577 | if (!so->so_is_open_owner) |
2578 | continue; | |
a50d2ad1 BF |
2579 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2580 | oo = openowner(so); | |
d15c077e BF |
2581 | clp = oo->oo_owner.so_client; |
2582 | if ((bool)clp->cl_minorversion != sessions) | |
2583 | return NULL; | |
a50d2ad1 BF |
2584 | renew_client(oo->oo_owner.so_client); |
2585 | return oo; | |
2586 | } | |
1da177e4 LT |
2587 | } |
2588 | return NULL; | |
2589 | } | |
2590 | ||
2591 | /* search file_hashtbl[] for file */ | |
2592 | static struct nfs4_file * | |
2593 | find_file(struct inode *ino) | |
2594 | { | |
2595 | unsigned int hashval = file_hashval(ino); | |
2596 | struct nfs4_file *fp; | |
2597 | ||
8b671b80 | 2598 | spin_lock(&recall_lock); |
89876f8c | 2599 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2600 | if (fp->fi_inode == ino) { |
2601 | get_nfs4_file(fp); | |
8b671b80 | 2602 | spin_unlock(&recall_lock); |
1da177e4 | 2603 | return fp; |
13cd2184 | 2604 | } |
1da177e4 | 2605 | } |
8b671b80 | 2606 | spin_unlock(&recall_lock); |
1da177e4 LT |
2607 | return NULL; |
2608 | } | |
2609 | ||
1da177e4 LT |
2610 | /* |
2611 | * Called to check deny when READ with all zero stateid or | |
2612 | * WRITE with all zero or all one stateid | |
2613 | */ | |
b37ad28b | 2614 | static __be32 |
1da177e4 LT |
2615 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2616 | { | |
2617 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2618 | struct nfs4_file *fp; | |
dcef0413 | 2619 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2620 | __be32 ret; |
1da177e4 | 2621 | |
1da177e4 | 2622 | fp = find_file(ino); |
13cd2184 N |
2623 | if (!fp) |
2624 | return nfs_ok; | |
b700949b | 2625 | ret = nfserr_locked; |
1da177e4 | 2626 | /* Search for conflicting share reservations */ |
13cd2184 | 2627 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2628 | if (test_deny(deny_type, stp) || |
2629 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2630 | goto out; |
1da177e4 | 2631 | } |
13cd2184 N |
2632 | ret = nfs_ok; |
2633 | out: | |
2634 | put_nfs4_file(fp); | |
2635 | return ret; | |
1da177e4 LT |
2636 | } |
2637 | ||
6b57d9c8 | 2638 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2639 | { |
e8c69d17 BF |
2640 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
2641 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2642 | ||
1da177e4 LT |
2643 | /* We're assuming the state code never drops its reference |
2644 | * without first removing the lease. Since we're in this lease | |
2645 | * callback (and since the lease code is serialized by the kernel | |
2646 | * lock) we know the server hasn't removed the lease yet, we know | |
2647 | * it's safe to take a reference: */ | |
2648 | atomic_inc(&dp->dl_count); | |
2649 | ||
e8c69d17 | 2650 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
1da177e4 | 2651 | |
460781b5 | 2652 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2653 | dp->dl_time = get_seconds(); |
2654 | ||
6b57d9c8 BF |
2655 | nfsd4_cb_recall(dp); |
2656 | } | |
2657 | ||
acfdf5c3 | 2658 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2659 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2660 | { | |
acfdf5c3 BF |
2661 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2662 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2663 | |
7fa10cd1 BF |
2664 | if (!fp) { |
2665 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2666 | return; | |
2667 | } | |
2668 | if (fp->fi_had_conflict) { | |
2669 | WARN(1, "duplicate break on %p\n", fp); | |
2670 | return; | |
2671 | } | |
0272e1fd BF |
2672 | /* |
2673 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2674 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2675 | * in time: |
0272e1fd BF |
2676 | */ |
2677 | fl->fl_break_time = 0; | |
1da177e4 | 2678 | |
5d926e8c | 2679 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2680 | fp->fi_had_conflict = true; |
2681 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2682 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2683 | spin_unlock(&recall_lock); |
1da177e4 LT |
2684 | } |
2685 | ||
1da177e4 LT |
2686 | static |
2687 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2688 | { | |
2689 | if (arg & F_UNLCK) | |
2690 | return lease_modify(onlist, arg); | |
2691 | else | |
2692 | return -EAGAIN; | |
2693 | } | |
2694 | ||
7b021967 | 2695 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2696 | .lm_break = nfsd_break_deleg_cb, |
2697 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2698 | }; |
2699 | ||
7a8711c9 BF |
2700 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2701 | { | |
2702 | if (nfsd4_has_session(cstate)) | |
2703 | return nfs_ok; | |
2704 | if (seqid == so->so_seqid - 1) | |
2705 | return nfserr_replay_me; | |
2706 | if (seqid == so->so_seqid) | |
2707 | return nfs_ok; | |
2708 | return nfserr_bad_seqid; | |
2709 | } | |
1da177e4 | 2710 | |
b37ad28b | 2711 | __be32 |
6668958f | 2712 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 2713 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 2714 | { |
1da177e4 LT |
2715 | clientid_t *clientid = &open->op_clientid; |
2716 | struct nfs4_client *clp = NULL; | |
2717 | unsigned int strhashval; | |
fe0750e5 | 2718 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2719 | __be32 status; |
1da177e4 | 2720 | |
2c142baa | 2721 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2722 | return nfserr_stale_clientid; |
32513b40 BF |
2723 | /* |
2724 | * In case we need it later, after we've already created the | |
2725 | * file and don't want to risk a further failure: | |
2726 | */ | |
2727 | open->op_file = nfsd4_alloc_file(); | |
2728 | if (open->op_file == NULL) | |
2729 | return nfserr_jukebox; | |
1da177e4 | 2730 | |
16bfdaaf | 2731 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 2732 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
2733 | open->op_openowner = oo; |
2734 | if (!oo) { | |
8daae4dc SK |
2735 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2736 | nn); | |
1da177e4 | 2737 | if (clp == NULL) |
0f442aa2 | 2738 | return nfserr_expired; |
bcf130f9 | 2739 | goto new_owner; |
1da177e4 | 2740 | } |
dad1c067 | 2741 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2742 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2743 | clp = oo->oo_owner.so_client; |
2744 | release_openowner(oo); | |
2745 | open->op_openowner = NULL; | |
bcf130f9 | 2746 | goto new_owner; |
0f442aa2 | 2747 | } |
4cdc951b BF |
2748 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2749 | if (status) | |
2750 | return status; | |
2751 | clp = oo->oo_owner.so_client; | |
2752 | goto alloc_stateid; | |
bcf130f9 BF |
2753 | new_owner: |
2754 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2755 | if (oo == NULL) | |
2756 | return nfserr_jukebox; | |
2757 | open->op_openowner = oo; | |
4cdc951b BF |
2758 | alloc_stateid: |
2759 | open->op_stp = nfs4_alloc_stateid(clp); | |
2760 | if (!open->op_stp) | |
2761 | return nfserr_jukebox; | |
0f442aa2 | 2762 | return nfs_ok; |
1da177e4 LT |
2763 | } |
2764 | ||
b37ad28b | 2765 | static inline __be32 |
4a6e43e6 N |
2766 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2767 | { | |
2768 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2769 | return nfserr_openmode; | |
2770 | else | |
2771 | return nfs_ok; | |
2772 | } | |
2773 | ||
f459e453 | 2774 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2775 | { |
f459e453 | 2776 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2777 | } |
2778 | ||
38c2f4b1 | 2779 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2780 | { |
f459e453 | 2781 | struct nfs4_stid *ret; |
24a0111e | 2782 | |
38c2f4b1 | 2783 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2784 | if (!ret) |
2785 | return NULL; | |
2786 | return delegstateid(ret); | |
24a0111e BF |
2787 | } |
2788 | ||
8b289b2c BF |
2789 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2790 | { | |
2791 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2792 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2793 | } | |
2794 | ||
b37ad28b | 2795 | static __be32 |
41d22663 | 2796 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
2797 | struct nfs4_delegation **dp) |
2798 | { | |
2799 | int flags; | |
b37ad28b | 2800 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2801 | |
38c2f4b1 | 2802 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2803 | if (*dp == NULL) |
c44c5eeb | 2804 | goto out; |
24a0111e | 2805 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2806 | status = nfs4_check_delegmode(*dp, flags); |
2807 | if (status) | |
2808 | *dp = NULL; | |
c44c5eeb | 2809 | out: |
8b289b2c | 2810 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2811 | return nfs_ok; |
2812 | if (status) | |
2813 | return status; | |
dad1c067 | 2814 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2815 | return nfs_ok; |
567d9829 N |
2816 | } |
2817 | ||
b37ad28b | 2818 | static __be32 |
dcef0413 | 2819 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2820 | { |
dcef0413 | 2821 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2822 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2823 | |
8beefa24 | 2824 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2825 | /* ignore lock owners */ |
2826 | if (local->st_stateowner->so_is_open_owner == 0) | |
2827 | continue; | |
2828 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2829 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2830 | *stpp = local; |
2831 | /* check for conflicting share reservations */ | |
2832 | if (!test_share(local, open)) | |
77eaae8d | 2833 | return nfserr_share_denied; |
1da177e4 | 2834 | } |
77eaae8d | 2835 | return nfs_ok; |
1da177e4 LT |
2836 | } |
2837 | ||
21fb4016 BF |
2838 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2839 | { | |
2840 | int flags = 0; | |
2841 | ||
2842 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2843 | flags |= NFSD_MAY_READ; | |
2844 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2845 | flags |= NFSD_MAY_WRITE; | |
2846 | return flags; | |
2847 | } | |
2848 | ||
0c12eaff CB |
2849 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2850 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2851 | { |
2852 | __be32 status; | |
0c12eaff CB |
2853 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2854 | int access = nfs4_access_to_access(open->op_share_access); | |
2855 | ||
f9d7562f BF |
2856 | if (!fp->fi_fds[oflag]) { |
2857 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2858 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2859 | if (status) |
2860 | return status; | |
2861 | } | |
2862 | nfs4_file_get_access(fp, oflag); | |
2863 | ||
2864 | return nfs_ok; | |
2865 | } | |
2866 | ||
b37ad28b | 2867 | static inline __be32 |
1da177e4 LT |
2868 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2869 | struct nfsd4_open *open) | |
2870 | { | |
2871 | struct iattr iattr = { | |
2872 | .ia_valid = ATTR_SIZE, | |
2873 | .ia_size = 0, | |
2874 | }; | |
2875 | if (!open->op_truncate) | |
2876 | return 0; | |
2877 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2878 | return nfserr_inval; |
1da177e4 LT |
2879 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2880 | } | |
2881 | ||
b37ad28b | 2882 | static __be32 |
dcef0413 | 2883 | 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 | 2884 | { |
b6d2f1ca | 2885 | u32 op_share_access = open->op_share_access; |
7d947842 | 2886 | bool new_access; |
b37ad28b | 2887 | __be32 status; |
1da177e4 | 2888 | |
82c5ff1b | 2889 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2890 | if (new_access) { |
0c12eaff | 2891 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2892 | if (status) |
2893 | return status; | |
6c26d08f | 2894 | } |
1da177e4 LT |
2895 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2896 | if (status) { | |
f9d7562f | 2897 | if (new_access) { |
f197c271 | 2898 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2899 | nfs4_file_put_access(fp, oflag); |
2900 | } | |
1da177e4 LT |
2901 | return status; |
2902 | } | |
2903 | /* remember the open */ | |
82c5ff1b | 2904 | set_access(op_share_access, stp); |
ce0fc43c | 2905 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2906 | |
2907 | return nfs_ok; | |
2908 | } | |
2909 | ||
2910 | ||
1da177e4 | 2911 | static void |
1255a8f3 | 2912 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2913 | { |
dad1c067 | 2914 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2915 | } |
2916 | ||
14a24e99 BF |
2917 | /* Should we give out recallable state?: */ |
2918 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2919 | { | |
2920 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2921 | return true; | |
2922 | /* | |
2923 | * In the sessions case, since we don't have to establish a | |
2924 | * separate connection for callbacks, we assume it's OK | |
2925 | * until we hear otherwise: | |
2926 | */ | |
2927 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2928 | } | |
2929 | ||
22d38c4c BF |
2930 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2931 | { | |
2932 | struct file_lock *fl; | |
2933 | ||
2934 | fl = locks_alloc_lock(); | |
2935 | if (!fl) | |
2936 | return NULL; | |
2937 | locks_init_lock(fl); | |
2938 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2939 | fl->fl_flags = FL_LEASE; | |
2940 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2941 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2942 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2943 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2944 | return fl; |
2945 | } | |
2946 | ||
edab9782 BF |
2947 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2948 | { | |
acfdf5c3 | 2949 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2950 | struct file_lock *fl; |
2951 | int status; | |
2952 | ||
2953 | fl = nfs4_alloc_init_lease(dp, flag); | |
2954 | if (!fl) | |
2955 | return -ENOMEM; | |
acfdf5c3 | 2956 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2957 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2958 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2959 | if (status) { |
acfdf5c3 | 2960 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2961 | locks_free_lock(fl); |
2962 | return -ENOMEM; | |
2963 | } | |
acfdf5c3 | 2964 | fp->fi_lease = fl; |
cb0942b8 | 2965 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
2966 | atomic_set(&fp->fi_delegees, 1); |
2967 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2968 | return 0; | |
2969 | } | |
2970 | ||
2971 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2972 | { | |
2973 | struct nfs4_file *fp = dp->dl_file; | |
2974 | ||
2975 | if (!fp->fi_lease) | |
2976 | return nfs4_setlease(dp, flag); | |
2977 | spin_lock(&recall_lock); | |
2978 | if (fp->fi_had_conflict) { | |
2979 | spin_unlock(&recall_lock); | |
2980 | return -EAGAIN; | |
2981 | } | |
2982 | atomic_inc(&fp->fi_delegees); | |
2983 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2984 | spin_unlock(&recall_lock); | |
2a74aba7 | 2985 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2986 | return 0; |
2987 | } | |
2988 | ||
4aa8913c BH |
2989 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2990 | { | |
2991 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2992 | if (status == -EAGAIN) | |
2993 | open->op_why_no_deleg = WND4_CONTENTION; | |
2994 | else { | |
2995 | open->op_why_no_deleg = WND4_RESOURCE; | |
2996 | switch (open->op_deleg_want) { | |
2997 | case NFS4_SHARE_WANT_READ_DELEG: | |
2998 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2999 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3000 | break; | |
3001 | case NFS4_SHARE_WANT_CANCEL: | |
3002 | open->op_why_no_deleg = WND4_CANCELLED; | |
3003 | break; | |
3004 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3005 | WARN_ON_ONCE(1); |
4aa8913c BH |
3006 | } |
3007 | } | |
3008 | } | |
3009 | ||
1da177e4 LT |
3010 | /* |
3011 | * Attempt to hand out a delegation. | |
3012 | */ | |
3013 | static void | |
5ccb0066 SK |
3014 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
3015 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3016 | { |
3017 | struct nfs4_delegation *dp; | |
fe0750e5 | 3018 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 3019 | int cb_up; |
d24433cd | 3020 | int status = 0, flag = 0; |
1da177e4 | 3021 | |
fe0750e5 | 3022 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 3023 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
3024 | open->op_recall = 0; |
3025 | switch (open->op_claim_type) { | |
3026 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3027 | if (!cb_up) |
7b190fec N |
3028 | open->op_recall = 1; |
3029 | flag = open->op_delegate_type; | |
3030 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
3031 | goto out; | |
3032 | break; | |
3033 | case NFS4_OPEN_CLAIM_NULL: | |
3034 | /* Let's not give out any delegations till everyone's | |
3035 | * had the chance to reclaim theirs.... */ | |
5ccb0066 | 3036 | if (locks_in_grace(net)) |
7b190fec | 3037 | goto out; |
dad1c067 | 3038 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
3039 | goto out; |
3040 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
3041 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
3042 | else | |
3043 | flag = NFS4_OPEN_DELEGATE_READ; | |
3044 | break; | |
3045 | default: | |
3046 | goto out; | |
3047 | } | |
1da177e4 | 3048 | |
fe0750e5 | 3049 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
3050 | if (dp == NULL) |
3051 | goto out_no_deleg; | |
acfdf5c3 | 3052 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 3053 | if (status) |
dd239cc0 | 3054 | goto out_free; |
1da177e4 | 3055 | |
d5477a8d | 3056 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3057 | |
8c10cbdb | 3058 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3059 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
3060 | out: |
3061 | open->op_delegate_type = flag; | |
d24433cd BH |
3062 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
3063 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
3064 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
3065 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
3066 | ||
4aa8913c BH |
3067 | /* 4.1 client asking for a delegation? */ |
3068 | if (open->op_deleg_want) | |
3069 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 3070 | } |
dd239cc0 BF |
3071 | return; |
3072 | out_free: | |
24ffb938 | 3073 | unhash_stid(&dp->dl_stid); |
acfdf5c3 | 3074 | nfs4_put_delegation(dp); |
dd239cc0 BF |
3075 | out_no_deleg: |
3076 | flag = NFS4_OPEN_DELEGATE_NONE; | |
3077 | goto out; | |
1da177e4 LT |
3078 | } |
3079 | ||
e27f49c3 BH |
3080 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3081 | struct nfs4_delegation *dp) | |
3082 | { | |
3083 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3084 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3085 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3086 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3087 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3088 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3089 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3090 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3091 | } | |
3092 | /* Otherwise the client must be confused wanting a delegation | |
3093 | * it already has, therefore we don't return | |
3094 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3095 | */ | |
3096 | } | |
3097 | ||
1da177e4 LT |
3098 | /* |
3099 | * called with nfs4_lock_state() held. | |
3100 | */ | |
b37ad28b | 3101 | __be32 |
1da177e4 LT |
3102 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3103 | { | |
6668958f | 3104 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3105 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3106 | struct nfs4_file *fp = NULL; |
3107 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3108 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3109 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3110 | __be32 status; |
1da177e4 | 3111 | |
1da177e4 LT |
3112 | /* |
3113 | * Lookup file; if found, lookup stateid and check open request, | |
3114 | * and check for delegations in the process of being recalled. | |
3115 | * If not found, create the nfs4_file struct | |
3116 | */ | |
3117 | fp = find_file(ino); | |
3118 | if (fp) { | |
3119 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3120 | goto out; | |
41d22663 | 3121 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3122 | if (status) |
3123 | goto out; | |
1da177e4 | 3124 | } else { |
c44c5eeb | 3125 | status = nfserr_bad_stateid; |
8b289b2c | 3126 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3127 | goto out; |
3e772463 | 3128 | status = nfserr_jukebox; |
32513b40 BF |
3129 | fp = open->op_file; |
3130 | open->op_file = NULL; | |
3131 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3132 | } |
3133 | ||
3134 | /* | |
3135 | * OPEN the file, or upgrade an existing OPEN. | |
3136 | * If truncate fails, the OPEN fails. | |
3137 | */ | |
3138 | if (stp) { | |
3139 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3140 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3141 | if (status) |
3142 | goto out; | |
3143 | } else { | |
4cdc951b | 3144 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3145 | if (status) |
3146 | goto out; | |
3147 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3148 | if (status) |
1da177e4 | 3149 | goto out; |
4cdc951b BF |
3150 | stp = open->op_stp; |
3151 | open->op_stp = NULL; | |
996e0938 | 3152 | init_open_stateid(stp, fp, open); |
1da177e4 | 3153 | } |
dcef0413 BF |
3154 | update_stateid(&stp->st_stid.sc_stateid); |
3155 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3156 | |
d24433cd | 3157 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3158 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3159 | |
d24433cd BH |
3160 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3161 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3162 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3163 | goto nodeleg; | |
3164 | } | |
3165 | } | |
3166 | ||
1da177e4 LT |
3167 | /* |
3168 | * Attempt to hand out a delegation. No error return, because the | |
3169 | * OPEN succeeds even if we fail. | |
3170 | */ | |
5ccb0066 | 3171 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3172 | nodeleg: |
1da177e4 LT |
3173 | status = nfs_ok; |
3174 | ||
8c10cbdb | 3175 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3176 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3177 | out: |
d24433cd BH |
3178 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3179 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3180 | open->op_deleg_want) |
3181 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3182 | |
13cd2184 N |
3183 | if (fp) |
3184 | put_nfs4_file(fp); | |
37515177 | 3185 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3186 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3187 | /* |
3188 | * To finish the open response, we just need to set the rflags. | |
3189 | */ | |
3190 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3191 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3192 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3193 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3194 | ||
3195 | return status; | |
3196 | } | |
3197 | ||
d29b20cd BF |
3198 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3199 | { | |
3200 | if (open->op_openowner) { | |
3201 | struct nfs4_openowner *oo = open->op_openowner; | |
3202 | ||
3203 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3204 | list_del_init(&oo->oo_close_lru); | |
3205 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3206 | if (status) { | |
3207 | release_openowner(oo); | |
3208 | open->op_openowner = NULL; | |
3209 | } else | |
3210 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3211 | } | |
3212 | } | |
32513b40 BF |
3213 | if (open->op_file) |
3214 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3215 | if (open->op_stp) |
ef79859e | 3216 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3217 | } |
3218 | ||
9b2ef62b BF |
3219 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
3220 | { | |
3221 | struct nfs4_client *found; | |
3222 | ||
3223 | if (STALE_CLIENTID(clid, nn)) | |
3224 | return nfserr_stale_clientid; | |
3225 | found = find_confirmed_client(clid, session, nn); | |
3226 | if (clp) | |
3227 | *clp = found; | |
3228 | return found ? nfs_ok : nfserr_expired; | |
3229 | } | |
3230 | ||
b37ad28b | 3231 | __be32 |
b591480b BF |
3232 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3233 | clientid_t *clid) | |
1da177e4 LT |
3234 | { |
3235 | struct nfs4_client *clp; | |
b37ad28b | 3236 | __be32 status; |
7f2210fa | 3237 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3238 | |
3239 | nfs4_lock_state(); | |
3240 | dprintk("process_renew(%08x/%08x): starting\n", | |
3241 | clid->cl_boot, clid->cl_id); | |
9b2ef62b BF |
3242 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
3243 | if (status) | |
1da177e4 | 3244 | goto out; |
1da177e4 | 3245 | status = nfserr_cb_path_down; |
ea1da636 | 3246 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3247 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3248 | goto out; |
3249 | status = nfs_ok; | |
3250 | out: | |
3251 | nfs4_unlock_state(); | |
3252 | return status; | |
3253 | } | |
3254 | ||
a76b4319 | 3255 | static void |
12760c66 | 3256 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3257 | { |
33dcc481 | 3258 | /* do nothing if grace period already ended */ |
a51c84ed | 3259 | if (nn->grace_ended) |
33dcc481 JL |
3260 | return; |
3261 | ||
a76b4319 | 3262 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3263 | nn->grace_ended = true; |
12760c66 | 3264 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3265 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3266 | /* |
3267 | * Now that every NFSv4 client has had the chance to recover and | |
3268 | * to see the (possibly new, possibly shorter) lease time, we | |
3269 | * can safely set the next grace time to the current lease time: | |
3270 | */ | |
5284b44e | 3271 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3272 | } |
3273 | ||
fd39ca9a | 3274 | static time_t |
09121281 | 3275 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3276 | { |
3277 | struct nfs4_client *clp; | |
fe0750e5 | 3278 | struct nfs4_openowner *oo; |
1da177e4 LT |
3279 | struct nfs4_delegation *dp; |
3280 | struct list_head *pos, *next, reaplist; | |
3d733711 SK |
3281 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
3282 | time_t t, clientid_val = nn->nfsd4_lease; | |
3283 | time_t u, test_val = nn->nfsd4_lease; | |
1da177e4 LT |
3284 | |
3285 | nfs4_lock_state(); | |
3286 | ||
3287 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3288 | nfsd4_end_grace(nn); |
36acb66b | 3289 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3290 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3291 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3292 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3293 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3294 | t = clp->cl_time - cutoff; | |
3295 | if (clientid_val > t) | |
3296 | clientid_val = t; | |
3297 | break; | |
3298 | } | |
221a6876 | 3299 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3300 | dprintk("NFSD: client in use (clientid %08x)\n", |
3301 | clp->cl_clientid.cl_id); | |
3302 | continue; | |
3303 | } | |
221a6876 | 3304 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3305 | } |
c9a49628 | 3306 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3307 | list_for_each_safe(pos, next, &reaplist) { |
3308 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3309 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3310 | clp->cl_clientid.cl_id); | |
3311 | expire_client(clp); | |
3312 | } | |
1da177e4 | 3313 | spin_lock(&recall_lock); |
e8c69d17 | 3314 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3315 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3316 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3317 | continue; | |
1da177e4 LT |
3318 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
3319 | u = dp->dl_time - cutoff; | |
3320 | if (test_val > u) | |
3321 | test_val = u; | |
3322 | break; | |
3323 | } | |
1da177e4 LT |
3324 | list_move(&dp->dl_recall_lru, &reaplist); |
3325 | } | |
3326 | spin_unlock(&recall_lock); | |
3327 | list_for_each_safe(pos, next, &reaplist) { | |
3328 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 3329 | revoke_delegation(dp); |
1da177e4 | 3330 | } |
3d733711 | 3331 | test_val = nn->nfsd4_lease; |
73758fed | 3332 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3333 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3334 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3335 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3336 | if (test_val > u) |
3337 | test_val = u; | |
3338 | break; | |
3339 | } | |
fe0750e5 | 3340 | release_openowner(oo); |
1da177e4 LT |
3341 | } |
3342 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3343 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3344 | nfs4_unlock_state(); | |
3345 | return clientid_val; | |
3346 | } | |
3347 | ||
a254b246 HH |
3348 | static struct workqueue_struct *laundry_wq; |
3349 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3350 | |
3351 | static void | |
09121281 | 3352 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3353 | { |
3354 | time_t t; | |
09121281 SK |
3355 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3356 | work); | |
3357 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3358 | laundromat_work); | |
1da177e4 | 3359 | |
09121281 | 3360 | t = nfs4_laundromat(nn); |
1da177e4 | 3361 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3362 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3363 | } |
3364 | ||
f7a4d872 | 3365 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3366 | { |
f7a4d872 BF |
3367 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3368 | return nfserr_bad_stateid; | |
3369 | return nfs_ok; | |
1da177e4 LT |
3370 | } |
3371 | ||
1da177e4 | 3372 | static inline int |
82c5ff1b | 3373 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3374 | { |
82c5ff1b JL |
3375 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3376 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3377 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3378 | } |
3379 | ||
3380 | static inline int | |
82c5ff1b | 3381 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3382 | { |
82c5ff1b JL |
3383 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3384 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3385 | } |
3386 | ||
3387 | static | |
dcef0413 | 3388 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3389 | { |
b37ad28b | 3390 | __be32 status = nfserr_openmode; |
1da177e4 | 3391 | |
02921914 BF |
3392 | /* For lock stateid's, we test the parent open, not the lock: */ |
3393 | if (stp->st_openstp) | |
3394 | stp = stp->st_openstp; | |
82c5ff1b | 3395 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3396 | goto out; |
82c5ff1b | 3397 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3398 | goto out; |
3399 | status = nfs_ok; | |
3400 | out: | |
3401 | return status; | |
3402 | } | |
3403 | ||
b37ad28b | 3404 | static inline __be32 |
5ccb0066 | 3405 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3406 | { |
203a8c8e | 3407 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3408 | return nfs_ok; |
5ccb0066 | 3409 | else if (locks_in_grace(net)) { |
25985edc | 3410 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3411 | * conflicting state; so we must wait out the grace period. */ |
3412 | return nfserr_grace; | |
3413 | } else if (flags & WR_STATE) | |
3414 | return nfs4_share_conflict(current_fh, | |
3415 | NFS4_SHARE_DENY_WRITE); | |
3416 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3417 | return nfs4_share_conflict(current_fh, | |
3418 | NFS4_SHARE_DENY_READ); | |
3419 | } | |
3420 | ||
3421 | /* | |
3422 | * Allow READ/WRITE during grace period on recovered state only for files | |
3423 | * that are not able to provide mandatory locking. | |
3424 | */ | |
3425 | static inline int | |
5ccb0066 | 3426 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3427 | { |
5ccb0066 | 3428 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3429 | } |
3430 | ||
81b82965 BF |
3431 | /* Returns true iff a is later than b: */ |
3432 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3433 | { | |
3434 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3435 | } | |
3436 | ||
57b7b43b | 3437 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3438 | { |
6668958f AA |
3439 | /* |
3440 | * When sessions are used the stateid generation number is ignored | |
3441 | * when it is zero. | |
3442 | */ | |
28dde241 | 3443 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3444 | return nfs_ok; |
3445 | ||
3446 | if (in->si_generation == ref->si_generation) | |
3447 | return nfs_ok; | |
6668958f | 3448 | |
0836f587 | 3449 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3450 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3451 | return nfserr_bad_stateid; |
3452 | /* | |
81b82965 BF |
3453 | * However, we could see a stateid from the past, even from a |
3454 | * non-buggy client. For example, if the client sends a lock | |
3455 | * while some IO is outstanding, the lock may bump si_generation | |
3456 | * while the IO is still in flight. The client could avoid that | |
3457 | * situation by waiting for responses on all the IO requests, | |
3458 | * but better performance may result in retrying IO that | |
3459 | * receives an old_stateid error if requests are rarely | |
3460 | * reordered in flight: | |
0836f587 | 3461 | */ |
81b82965 | 3462 | return nfserr_old_stateid; |
0836f587 BF |
3463 | } |
3464 | ||
7df302f7 | 3465 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3466 | { |
97b7e3b6 BF |
3467 | struct nfs4_stid *s; |
3468 | struct nfs4_ol_stateid *ols; | |
3469 | __be32 status; | |
17456804 | 3470 | |
7df302f7 CL |
3471 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3472 | return nfserr_bad_stateid; | |
3473 | /* Client debugging aid. */ | |
3474 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3475 | char addr_str[INET6_ADDRSTRLEN]; | |
3476 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3477 | sizeof(addr_str)); | |
3478 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3479 | "with incorrect client ID\n", addr_str); | |
3480 | return nfserr_bad_stateid; | |
3481 | } | |
38c2f4b1 | 3482 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3483 | if (!s) |
7df302f7 | 3484 | return nfserr_bad_stateid; |
36279ac1 | 3485 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3486 | if (status) |
97b7e3b6 | 3487 | return status; |
23340032 BF |
3488 | switch (s->sc_type) { |
3489 | case NFS4_DELEG_STID: | |
97b7e3b6 | 3490 | return nfs_ok; |
3bd64a5b BF |
3491 | case NFS4_REVOKED_DELEG_STID: |
3492 | return nfserr_deleg_revoked; | |
23340032 BF |
3493 | case NFS4_OPEN_STID: |
3494 | case NFS4_LOCK_STID: | |
3495 | ols = openlockstateid(s); | |
3496 | if (ols->st_stateowner->so_is_open_owner | |
3497 | && !(openowner(ols->st_stateowner)->oo_flags | |
3498 | & NFS4_OO_CONFIRMED)) | |
3499 | return nfserr_bad_stateid; | |
3500 | return nfs_ok; | |
3501 | default: | |
3502 | printk("unknown stateid type %x\n", s->sc_type); | |
3503 | case NFS4_CLOSED_STID: | |
97b7e3b6 | 3504 | return nfserr_bad_stateid; |
23340032 | 3505 | } |
17456804 BS |
3506 | } |
3507 | ||
3320fef1 SK |
3508 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
3509 | struct nfs4_stid **s, bool sessions, | |
3510 | struct nfsd_net *nn) | |
38c2f4b1 BF |
3511 | { |
3512 | struct nfs4_client *cl; | |
0eb6f20a | 3513 | __be32 status; |
38c2f4b1 BF |
3514 | |
3515 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3516 | return nfserr_bad_stateid; | |
0eb6f20a BF |
3517 | status = lookup_clientid(&stateid->si_opaque.so_clid, sessions, |
3518 | nn, &cl); | |
3519 | if (status == nfserr_stale_clientid) | |
38c2f4b1 | 3520 | return nfserr_stale_stateid; |
0eb6f20a BF |
3521 | if (status) |
3522 | return status; | |
38c2f4b1 BF |
3523 | *s = find_stateid_by_type(cl, stateid, typemask); |
3524 | if (!*s) | |
3525 | return nfserr_bad_stateid; | |
3526 | return nfs_ok; | |
38c2f4b1 BF |
3527 | } |
3528 | ||
1da177e4 LT |
3529 | /* |
3530 | * Checks for stateid operations | |
3531 | */ | |
b37ad28b | 3532 | __be32 |
5ccb0066 | 3533 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3534 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3535 | { |
69064a27 | 3536 | struct nfs4_stid *s; |
dcef0413 | 3537 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3538 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3539 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3540 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3541 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b37ad28b | 3542 | __be32 status; |
1da177e4 | 3543 | |
1da177e4 LT |
3544 | if (filpp) |
3545 | *filpp = NULL; | |
3546 | ||
5ccb0066 | 3547 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3548 | return nfserr_grace; |
3549 | ||
3550 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3551 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3552 | |
3320fef1 SK |
3553 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
3554 | &s, cstate->minorversion, nn); | |
38c2f4b1 BF |
3555 | if (status) |
3556 | return status; | |
69064a27 BF |
3557 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3558 | if (status) | |
3559 | goto out; | |
f7a4d872 BF |
3560 | switch (s->sc_type) { |
3561 | case NFS4_DELEG_STID: | |
69064a27 | 3562 | dp = delegstateid(s); |
dc9bf700 BF |
3563 | status = nfs4_check_delegmode(dp, flags); |
3564 | if (status) | |
3565 | goto out; | |
43b0178e | 3566 | if (filpp) { |
acfdf5c3 | 3567 | *filpp = dp->dl_file->fi_deleg_file; |
063b0fb9 BF |
3568 | if (!*filpp) { |
3569 | WARN_ON_ONCE(1); | |
3570 | status = nfserr_serverfault; | |
3571 | goto out; | |
3572 | } | |
43b0178e | 3573 | } |
f7a4d872 BF |
3574 | break; |
3575 | case NFS4_OPEN_STID: | |
3576 | case NFS4_LOCK_STID: | |
69064a27 | 3577 | stp = openlockstateid(s); |
f7a4d872 BF |
3578 | status = nfs4_check_fh(current_fh, stp); |
3579 | if (status) | |
1da177e4 | 3580 | goto out; |
fe0750e5 | 3581 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3582 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3583 | goto out; |
a4455be0 BF |
3584 | status = nfs4_check_openmode(stp, flags); |
3585 | if (status) | |
1da177e4 | 3586 | goto out; |
f9d7562f BF |
3587 | if (filpp) { |
3588 | if (flags & RD_STATE) | |
3589 | *filpp = find_readable_file(stp->st_file); | |
3590 | else | |
3591 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3592 | } |
f7a4d872 BF |
3593 | break; |
3594 | default: | |
3595 | return nfserr_bad_stateid; | |
1da177e4 LT |
3596 | } |
3597 | status = nfs_ok; | |
3598 | out: | |
3599 | return status; | |
3600 | } | |
3601 | ||
e1ca12df | 3602 | static __be32 |
dcef0413 | 3603 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3604 | { |
fe0750e5 | 3605 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3606 | return nfserr_locks_held; |
3607 | release_lock_stateid(stp); | |
3608 | return nfs_ok; | |
3609 | } | |
3610 | ||
17456804 BS |
3611 | /* |
3612 | * Test if the stateid is valid | |
3613 | */ | |
3614 | __be32 | |
3615 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3616 | struct nfsd4_test_stateid *test_stateid) | |
3617 | { | |
03cfb420 BS |
3618 | struct nfsd4_test_stateid_id *stateid; |
3619 | struct nfs4_client *cl = cstate->session->se_client; | |
3620 | ||
3621 | nfs4_lock_state(); | |
3622 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3623 | stateid->ts_id_status = |
3624 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3625 | nfs4_unlock_state(); |
3626 | ||
17456804 BS |
3627 | return nfs_ok; |
3628 | } | |
3629 | ||
e1ca12df BS |
3630 | __be32 |
3631 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3632 | struct nfsd4_free_stateid *free_stateid) | |
3633 | { | |
3634 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3635 | struct nfs4_stid *s; |
3bd64a5b | 3636 | struct nfs4_delegation *dp; |
38c2f4b1 | 3637 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3638 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3639 | |
3640 | nfs4_lock_state(); | |
38c2f4b1 | 3641 | s = find_stateid(cl, stateid); |
2da1cec7 | 3642 | if (!s) |
81b82965 | 3643 | goto out; |
2da1cec7 BF |
3644 | switch (s->sc_type) { |
3645 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3646 | ret = nfserr_locks_held; |
3647 | goto out; | |
2da1cec7 BF |
3648 | case NFS4_OPEN_STID: |
3649 | case NFS4_LOCK_STID: | |
3650 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3651 | if (ret) | |
3652 | goto out; | |
3653 | if (s->sc_type == NFS4_LOCK_STID) | |
3654 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3655 | else | |
3656 | ret = nfserr_locks_held; | |
f7a4d872 | 3657 | break; |
3bd64a5b BF |
3658 | case NFS4_REVOKED_DELEG_STID: |
3659 | dp = delegstateid(s); | |
3660 | destroy_revoked_delegation(dp); | |
3661 | ret = nfs_ok; | |
3662 | break; | |
f7a4d872 BF |
3663 | default: |
3664 | ret = nfserr_bad_stateid; | |
e1ca12df | 3665 | } |
e1ca12df BS |
3666 | out: |
3667 | nfs4_unlock_state(); | |
3668 | return ret; | |
3669 | } | |
3670 | ||
4c4cd222 N |
3671 | static inline int |
3672 | setlkflg (int type) | |
3673 | { | |
3674 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3675 | RD_STATE : WR_STATE; | |
3676 | } | |
1da177e4 | 3677 | |
dcef0413 | 3678 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3679 | { |
3680 | struct svc_fh *current_fh = &cstate->current_fh; | |
3681 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3682 | __be32 status; | |
3683 | ||
c0a5d93e BF |
3684 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3685 | if (status) | |
3686 | return status; | |
3bd64a5b BF |
3687 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
3688 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
3689 | /* |
3690 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
3691 | * nfserr_replay_me from the previous step, and |
3692 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
3693 | */ |
3694 | return nfserr_bad_stateid; | |
3695 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3696 | if (status) | |
3697 | return status; | |
3698 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3699 | } |
3700 | ||
1da177e4 LT |
3701 | /* |
3702 | * Checks for sequence id mutating operations. | |
3703 | */ | |
b37ad28b | 3704 | static __be32 |
dd453dfd | 3705 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3706 | stateid_t *stateid, char typemask, |
3320fef1 SK |
3707 | struct nfs4_ol_stateid **stpp, |
3708 | struct nfsd_net *nn) | |
1da177e4 | 3709 | { |
0836f587 | 3710 | __be32 status; |
38c2f4b1 | 3711 | struct nfs4_stid *s; |
1da177e4 | 3712 | |
8c10cbdb BH |
3713 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3714 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3715 | |
1da177e4 | 3716 | *stpp = NULL; |
3320fef1 SK |
3717 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
3718 | cstate->minorversion, nn); | |
c0a5d93e BF |
3719 | if (status) |
3720 | return status; | |
38c2f4b1 | 3721 | *stpp = openlockstateid(s); |
3d74e6a5 BF |
3722 | if (!nfsd4_has_session(cstate)) |
3723 | cstate->replay_owner = (*stpp)->st_stateowner; | |
1da177e4 | 3724 | |
c0a5d93e BF |
3725 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3726 | } | |
39325bd0 | 3727 | |
3320fef1 SK |
3728 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3729 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
3730 | { |
3731 | __be32 status; | |
3732 | struct nfs4_openowner *oo; | |
1da177e4 | 3733 | |
c0a5d93e | 3734 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 3735 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
3736 | if (status) |
3737 | return status; | |
c0a5d93e | 3738 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3739 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3740 | return nfserr_bad_stateid; |
3a4f98bb | 3741 | return nfs_ok; |
1da177e4 LT |
3742 | } |
3743 | ||
b37ad28b | 3744 | __be32 |
ca364317 | 3745 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3746 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3747 | { |
b37ad28b | 3748 | __be32 status; |
fe0750e5 | 3749 | struct nfs4_openowner *oo; |
dcef0413 | 3750 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3751 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3752 | |
3753 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3754 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3755 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3756 | |
ca364317 | 3757 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3758 | if (status) |
3759 | return status; | |
1da177e4 LT |
3760 | |
3761 | nfs4_lock_state(); | |
3762 | ||
9072d5c6 | 3763 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3764 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 3765 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 3766 | if (status) |
68b66e82 | 3767 | goto out; |
fe0750e5 | 3768 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3769 | status = nfserr_bad_stateid; |
dad1c067 | 3770 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3771 | goto out; |
dad1c067 | 3772 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3773 | update_stateid(&stp->st_stid.sc_stateid); |
3774 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3775 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3776 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3777 | |
2a4317c5 | 3778 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3779 | status = nfs_ok; |
1da177e4 | 3780 | out: |
9411b1d4 | 3781 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3782 | if (!cstate->replay_owner) |
3783 | nfs4_unlock_state(); | |
1da177e4 LT |
3784 | return status; |
3785 | } | |
3786 | ||
6409a5a6 | 3787 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3788 | { |
82c5ff1b | 3789 | if (!test_access(access, stp)) |
6409a5a6 BF |
3790 | return; |
3791 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3792 | clear_access(access, stp); |
6409a5a6 | 3793 | } |
f197c271 | 3794 | |
6409a5a6 BF |
3795 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3796 | { | |
3797 | switch (to_access) { | |
3798 | case NFS4_SHARE_ACCESS_READ: | |
3799 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3800 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3801 | break; | |
3802 | case NFS4_SHARE_ACCESS_WRITE: | |
3803 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3804 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3805 | break; | |
3806 | case NFS4_SHARE_ACCESS_BOTH: | |
3807 | break; | |
3808 | default: | |
063b0fb9 | 3809 | WARN_ON_ONCE(1); |
1da177e4 LT |
3810 | } |
3811 | } | |
3812 | ||
3813 | static void | |
ce0fc43c | 3814 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3815 | { |
3816 | int i; | |
3817 | for (i = 0; i < 4; i++) { | |
3818 | if ((i & deny) != i) | |
ce0fc43c | 3819 | clear_deny(i, stp); |
1da177e4 LT |
3820 | } |
3821 | } | |
3822 | ||
b37ad28b | 3823 | __be32 |
ca364317 BF |
3824 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3825 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3826 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3827 | { |
b37ad28b | 3828 | __be32 status; |
dcef0413 | 3829 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3830 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3831 | |
3832 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3833 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3834 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3835 | |
c30e92df | 3836 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3837 | if (od->od_deleg_want) |
3838 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3839 | od->od_deleg_want); | |
1da177e4 LT |
3840 | |
3841 | nfs4_lock_state(); | |
c0a5d93e | 3842 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 3843 | &od->od_stateid, &stp, nn); |
9072d5c6 | 3844 | if (status) |
1da177e4 | 3845 | goto out; |
1da177e4 | 3846 | status = nfserr_inval; |
82c5ff1b JL |
3847 | if (!test_access(od->od_share_access, stp)) { |
3848 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3849 | stp->st_access_bmap, od->od_share_access); |
3850 | goto out; | |
3851 | } | |
ce0fc43c | 3852 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3853 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3854 | stp->st_deny_bmap, od->od_share_deny); | |
3855 | goto out; | |
3856 | } | |
6409a5a6 | 3857 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3858 | |
ce0fc43c | 3859 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3860 | |
dcef0413 BF |
3861 | update_stateid(&stp->st_stid.sc_stateid); |
3862 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3863 | status = nfs_ok; |
3864 | out: | |
9411b1d4 | 3865 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3866 | if (!cstate->replay_owner) |
3867 | nfs4_unlock_state(); | |
1da177e4 LT |
3868 | return status; |
3869 | } | |
3870 | ||
f7a4d872 BF |
3871 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
3872 | { | |
3873 | unhash_open_stateid(s); | |
3874 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3875 | } |
3876 | ||
1da177e4 LT |
3877 | /* |
3878 | * nfs4_unlock_state() called after encode | |
3879 | */ | |
b37ad28b | 3880 | __be32 |
ca364317 | 3881 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3882 | struct nfsd4_close *close) |
1da177e4 | 3883 | { |
b37ad28b | 3884 | __be32 status; |
fe0750e5 | 3885 | struct nfs4_openowner *oo; |
dcef0413 | 3886 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
3887 | struct net *net = SVC_NET(rqstp); |
3888 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
3889 | |
3890 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3891 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3892 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3893 | |
3894 | nfs4_lock_state(); | |
f7a4d872 BF |
3895 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3896 | &close->cl_stateid, | |
3897 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 3898 | &stp, nn); |
9411b1d4 | 3899 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 3900 | if (status) |
1da177e4 | 3901 | goto out; |
fe0750e5 | 3902 | oo = openowner(stp->st_stateowner); |
dcef0413 BF |
3903 | update_stateid(&stp->st_stid.sc_stateid); |
3904 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3905 | |
f7a4d872 | 3906 | nfsd4_close_open_stateid(stp); |
9411b1d4 BF |
3907 | |
3908 | if (cstate->minorversion) { | |
3909 | unhash_stid(&stp->st_stid); | |
3910 | free_generic_stateid(stp); | |
3911 | } else | |
3912 | oo->oo_last_closed_stid = stp; | |
04ef5954 | 3913 | |
74dbafaf | 3914 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3d74e6a5 | 3915 | if (cstate->minorversion) |
74dbafaf | 3916 | release_openowner(oo); |
3d74e6a5 | 3917 | else { |
74dbafaf BF |
3918 | /* |
3919 | * In the 4.0 case we need to keep the owners around a | |
3920 | * little while to handle CLOSE replay. | |
3921 | */ | |
53584f66 | 3922 | move_to_close_lru(oo, SVC_NET(rqstp)); |
74dbafaf BF |
3923 | } |
3924 | } | |
1da177e4 | 3925 | out: |
5ec094c1 BF |
3926 | if (!cstate->replay_owner) |
3927 | nfs4_unlock_state(); | |
1da177e4 LT |
3928 | return status; |
3929 | } | |
3930 | ||
b37ad28b | 3931 | __be32 |
ca364317 BF |
3932 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3933 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3934 | { |
203a8c8e BF |
3935 | struct nfs4_delegation *dp; |
3936 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3937 | struct nfs4_stid *s; |
b37ad28b | 3938 | __be32 status; |
3320fef1 | 3939 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3940 | |
ca364317 | 3941 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 3942 | return status; |
1da177e4 LT |
3943 | |
3944 | nfs4_lock_state(); | |
3320fef1 SK |
3945 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
3946 | cstate->minorversion, nn); | |
38c2f4b1 | 3947 | if (status) |
203a8c8e | 3948 | goto out; |
38c2f4b1 | 3949 | dp = delegstateid(s); |
d5477a8d | 3950 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3951 | if (status) |
3952 | goto out; | |
203a8c8e | 3953 | |
3bd64a5b | 3954 | destroy_delegation(dp); |
1da177e4 | 3955 | out: |
203a8c8e BF |
3956 | nfs4_unlock_state(); |
3957 | ||
1da177e4 LT |
3958 | return status; |
3959 | } | |
3960 | ||
3961 | ||
1da177e4 | 3962 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3963 | |
009673b4 | 3964 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
1da177e4 | 3965 | |
87df4de8 BH |
3966 | static inline u64 |
3967 | end_offset(u64 start, u64 len) | |
3968 | { | |
3969 | u64 end; | |
3970 | ||
3971 | end = start + len; | |
3972 | return end >= start ? end: NFS4_MAX_UINT64; | |
3973 | } | |
3974 | ||
3975 | /* last octet in a range */ | |
3976 | static inline u64 | |
3977 | last_byte_offset(u64 start, u64 len) | |
3978 | { | |
3979 | u64 end; | |
3980 | ||
063b0fb9 | 3981 | WARN_ON_ONCE(!len); |
87df4de8 BH |
3982 | end = start + len; |
3983 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3984 | } | |
3985 | ||
009673b4 | 3986 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3987 | { |
3988 | return (file_hashval(inode) + cl_id | |
3989 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3990 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3991 | } |
3992 | ||
1da177e4 LT |
3993 | /* |
3994 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3995 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3996 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3997 | * locking, this prevents us from being completely protocol-compliant. The | |
3998 | * real solution to this problem is to start using unsigned file offsets in | |
3999 | * the VFS, but this is a very deep change! | |
4000 | */ | |
4001 | static inline void | |
4002 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4003 | { | |
4004 | if (lock->fl_start < 0) | |
4005 | lock->fl_start = OFFSET_MAX; | |
4006 | if (lock->fl_end < 0) | |
4007 | lock->fl_end = OFFSET_MAX; | |
4008 | } | |
4009 | ||
d5b9026a N |
4010 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4011 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4012 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4013 | }; |
1da177e4 LT |
4014 | |
4015 | static inline void | |
4016 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4017 | { | |
fe0750e5 | 4018 | struct nfs4_lockowner *lo; |
1da177e4 | 4019 | |
d5b9026a | 4020 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4021 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4022 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4023 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4024 | if (!deny->ld_owner.data) |
4025 | /* We just don't care that much */ | |
4026 | goto nevermind; | |
fe0750e5 BF |
4027 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4028 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4029 | } else { |
7c13f344 BF |
4030 | nevermind: |
4031 | deny->ld_owner.len = 0; | |
4032 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4033 | deny->ld_clientid.cl_boot = 0; |
4034 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4035 | } |
4036 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4037 | deny->ld_length = NFS4_MAX_UINT64; |
4038 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4039 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4040 | deny->ld_type = NFS4_READ_LT; | |
4041 | if (fl->fl_type != F_RDLCK) | |
4042 | deny->ld_type = NFS4_WRITE_LT; | |
4043 | } | |
4044 | ||
b93d87c1 BF |
4045 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
4046 | { | |
4047 | struct nfs4_ol_stateid *lst; | |
4048 | ||
4049 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
4050 | return false; | |
4051 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4052 | struct nfs4_ol_stateid, st_perstateowner); | |
4053 | return lst->st_file->fi_inode == inode; | |
4054 | } | |
4055 | ||
fe0750e5 BF |
4056 | static struct nfs4_lockowner * |
4057 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
20e9e2bc | 4058 | struct xdr_netobj *owner, struct nfsd_net *nn) |
1da177e4 | 4059 | { |
009673b4 | 4060 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 4061 | struct nfs4_lockowner *lo; |
1da177e4 | 4062 | |
20e9e2bc | 4063 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
4064 | if (same_lockowner_ino(lo, inode, clid, owner)) |
4065 | return lo; | |
1da177e4 LT |
4066 | } |
4067 | return NULL; | |
4068 | } | |
4069 | ||
dcef0413 | 4070 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 4071 | { |
009673b4 BF |
4072 | struct inode *inode = open_stp->st_file->fi_inode; |
4073 | unsigned int inohash = lockowner_ino_hashval(inode, | |
4074 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
9b531137 | 4075 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
009673b4 | 4076 | |
9b531137 | 4077 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
20e9e2bc | 4078 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 4079 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
4080 | } |
4081 | ||
1da177e4 LT |
4082 | /* |
4083 | * Alloc a lock owner structure. | |
4084 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4085 | * occurred. |
1da177e4 | 4086 | * |
16bfdaaf | 4087 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4088 | */ |
4089 | ||
fe0750e5 | 4090 | static struct nfs4_lockowner * |
dcef0413 | 4091 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4092 | struct nfs4_lockowner *lo; |
1da177e4 | 4093 | |
fe0750e5 BF |
4094 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4095 | if (!lo) | |
1da177e4 | 4096 | return NULL; |
fe0750e5 BF |
4097 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4098 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4099 | /* It is the openowner seqid that will be incremented in encode in the |
4100 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4101 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4102 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4103 | return lo; | |
1da177e4 LT |
4104 | } |
4105 | ||
dcef0413 BF |
4106 | static struct nfs4_ol_stateid * |
4107 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4108 | { |
dcef0413 | 4109 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4110 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4111 | |
996e0938 | 4112 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4113 | if (stp == NULL) |
6136d2b4 | 4114 | return NULL; |
3abdb607 | 4115 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4116 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4117 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4118 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4119 | get_nfs4_file(fp); |
1da177e4 | 4120 | stp->st_file = fp; |
0997b173 | 4121 | stp->st_access_bmap = 0; |
1da177e4 | 4122 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4123 | stp->st_openstp = open_stp; |
1da177e4 LT |
4124 | return stp; |
4125 | } | |
4126 | ||
fd39ca9a | 4127 | static int |
1da177e4 LT |
4128 | check_lock_length(u64 offset, u64 length) |
4129 | { | |
87df4de8 | 4130 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4131 | LOFF_OVERFLOW(offset, length))); |
4132 | } | |
4133 | ||
dcef0413 | 4134 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4135 | { |
4136 | struct nfs4_file *fp = lock_stp->st_file; | |
4137 | int oflag = nfs4_access_to_omode(access); | |
4138 | ||
82c5ff1b | 4139 | if (test_access(access, lock_stp)) |
0997b173 BF |
4140 | return; |
4141 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4142 | set_access(access, lock_stp); |
0997b173 BF |
4143 | } |
4144 | ||
2355c596 | 4145 | 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 |
4146 | { |
4147 | struct nfs4_file *fi = ost->st_file; | |
4148 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4149 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4150 | struct nfs4_lockowner *lo; | |
4151 | unsigned int strhashval; | |
20e9e2bc | 4152 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4153 | |
20e9e2bc SK |
4154 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
4155 | &lock->v.new.owner, nn); | |
64a284d0 BF |
4156 | if (lo) { |
4157 | if (!cstate->minorversion) | |
4158 | return nfserr_bad_seqid; | |
4159 | /* XXX: a lockowner always has exactly one stateid: */ | |
4160 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4161 | struct nfs4_ol_stateid, st_perstateowner); | |
4162 | return nfs_ok; | |
4163 | } | |
16bfdaaf | 4164 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4165 | &lock->v.new.owner); |
4166 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4167 | if (lo == NULL) | |
4168 | return nfserr_jukebox; | |
4169 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4170 | if (*lst == NULL) { | |
4171 | release_lockowner(lo); | |
4172 | return nfserr_jukebox; | |
4173 | } | |
4174 | *new = true; | |
4175 | return nfs_ok; | |
4176 | } | |
4177 | ||
1da177e4 LT |
4178 | /* |
4179 | * LOCK operation | |
4180 | */ | |
b37ad28b | 4181 | __be32 |
ca364317 | 4182 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4183 | struct nfsd4_lock *lock) |
1da177e4 | 4184 | { |
fe0750e5 BF |
4185 | struct nfs4_openowner *open_sop = NULL; |
4186 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4187 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4188 | struct file *filp = NULL; |
21179d81 JL |
4189 | struct file_lock *file_lock = NULL; |
4190 | struct file_lock *conflock = NULL; | |
b37ad28b | 4191 | __be32 status = 0; |
64a284d0 | 4192 | bool new_state = false; |
b34f27aa | 4193 | int lkflg; |
b8dd7b9a | 4194 | int err; |
3320fef1 SK |
4195 | struct net *net = SVC_NET(rqstp); |
4196 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4197 | |
4198 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4199 | (long long) lock->lk_offset, | |
4200 | (long long) lock->lk_length); | |
4201 | ||
1da177e4 LT |
4202 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4203 | return nfserr_inval; | |
4204 | ||
ca364317 | 4205 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4206 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4207 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4208 | return status; | |
4209 | } | |
4210 | ||
1da177e4 LT |
4211 | nfs4_lock_state(); |
4212 | ||
4213 | if (lock->lk_is_new) { | |
dcef0413 | 4214 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4215 | |
4216 | if (nfsd4_has_session(cstate)) | |
4217 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4218 | memcpy(&lock->v.new.clientid, | |
4219 | &cstate->session->se_client->cl_clientid, | |
4220 | sizeof(clientid_t)); | |
4221 | ||
1da177e4 | 4222 | status = nfserr_stale_clientid; |
2c142baa | 4223 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4224 | goto out; |
1da177e4 | 4225 | |
1da177e4 | 4226 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4227 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4228 | lock->lk_new_open_seqid, |
4229 | &lock->lk_new_open_stateid, | |
3320fef1 | 4230 | &open_stp, nn); |
37515177 | 4231 | if (status) |
1da177e4 | 4232 | goto out; |
fe0750e5 | 4233 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4234 | status = nfserr_bad_stateid; |
684e5638 | 4235 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4236 | &lock->v.new.clientid)) |
4237 | goto out; | |
64a284d0 BF |
4238 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4239 | &lock_stp, &new_state); | |
e1aaa891 | 4240 | } else |
dd453dfd | 4241 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4242 | lock->lk_old_lock_seqid, |
4243 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4244 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4245 | if (status) |
4246 | goto out; | |
64a284d0 | 4247 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4248 | |
b34f27aa BF |
4249 | lkflg = setlkflg(lock->lk_type); |
4250 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4251 | if (status) | |
4252 | goto out; | |
4253 | ||
0dd395dc | 4254 | status = nfserr_grace; |
3320fef1 | 4255 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4256 | goto out; |
4257 | status = nfserr_no_grace; | |
3320fef1 | 4258 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4259 | goto out; |
4260 | ||
21179d81 JL |
4261 | file_lock = locks_alloc_lock(); |
4262 | if (!file_lock) { | |
4263 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4264 | status = nfserr_jukebox; | |
4265 | goto out; | |
4266 | } | |
4267 | ||
4268 | locks_init_lock(file_lock); | |
1da177e4 LT |
4269 | switch (lock->lk_type) { |
4270 | case NFS4_READ_LT: | |
4271 | case NFS4_READW_LT: | |
0997b173 BF |
4272 | filp = find_readable_file(lock_stp->st_file); |
4273 | if (filp) | |
4274 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4275 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4276 | break; |
1da177e4 LT |
4277 | case NFS4_WRITE_LT: |
4278 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4279 | filp = find_writeable_file(lock_stp->st_file); |
4280 | if (filp) | |
4281 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4282 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4283 | break; |
1da177e4 LT |
4284 | default: |
4285 | status = nfserr_inval; | |
4286 | goto out; | |
4287 | } | |
f9d7562f BF |
4288 | if (!filp) { |
4289 | status = nfserr_openmode; | |
4290 | goto out; | |
4291 | } | |
21179d81 JL |
4292 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4293 | file_lock->fl_pid = current->tgid; | |
4294 | file_lock->fl_file = filp; | |
4295 | file_lock->fl_flags = FL_POSIX; | |
4296 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4297 | file_lock->fl_start = lock->lk_offset; | |
4298 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4299 | nfs4_transform_lock_offset(file_lock); | |
4300 | ||
4301 | conflock = locks_alloc_lock(); | |
4302 | if (!conflock) { | |
4303 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4304 | status = nfserr_jukebox; | |
4305 | goto out; | |
4306 | } | |
1da177e4 | 4307 | |
21179d81 | 4308 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4309 | switch (-err) { |
1da177e4 | 4310 | case 0: /* success! */ |
dcef0413 BF |
4311 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4312 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4313 | sizeof(stateid_t)); |
b8dd7b9a | 4314 | status = 0; |
eb76b3fd AA |
4315 | break; |
4316 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4317 | status = nfserr_denied; | |
4318 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4319 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4320 | break; |
1da177e4 LT |
4321 | case (EDEADLK): |
4322 | status = nfserr_deadlock; | |
eb76b3fd | 4323 | break; |
3e772463 | 4324 | default: |
fd85b817 | 4325 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4326 | status = nfserrno(err); |
eb76b3fd | 4327 | break; |
1da177e4 | 4328 | } |
1da177e4 | 4329 | out: |
64a284d0 | 4330 | if (status && new_state) |
f044ff83 | 4331 | release_lockowner(lock_sop); |
9411b1d4 | 4332 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4333 | if (!cstate->replay_owner) |
4334 | nfs4_unlock_state(); | |
21179d81 JL |
4335 | if (file_lock) |
4336 | locks_free_lock(file_lock); | |
4337 | if (conflock) | |
4338 | locks_free_lock(conflock); | |
1da177e4 LT |
4339 | return status; |
4340 | } | |
4341 | ||
55ef1274 BF |
4342 | /* |
4343 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4344 | * so we do a temporary open here just to get an open file to pass to | |
4345 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4346 | * inode operation.) | |
4347 | */ | |
04da6e9d | 4348 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4349 | { |
4350 | struct file *file; | |
04da6e9d AV |
4351 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4352 | if (!err) { | |
4353 | err = nfserrno(vfs_test_lock(file, lock)); | |
4354 | nfsd_close(file); | |
4355 | } | |
55ef1274 BF |
4356 | return err; |
4357 | } | |
4358 | ||
1da177e4 LT |
4359 | /* |
4360 | * LOCKT operation | |
4361 | */ | |
b37ad28b | 4362 | __be32 |
ca364317 BF |
4363 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4364 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4365 | { |
4366 | struct inode *inode; | |
21179d81 | 4367 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4368 | struct nfs4_lockowner *lo; |
b37ad28b | 4369 | __be32 status; |
7f2210fa | 4370 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4371 | |
5ccb0066 | 4372 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4373 | return nfserr_grace; |
4374 | ||
4375 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4376 | return nfserr_inval; | |
4377 | ||
1da177e4 LT |
4378 | nfs4_lock_state(); |
4379 | ||
9b2ef62b BF |
4380 | if (!nfsd4_has_session(cstate)) { |
4381 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); | |
4382 | if (status) | |
4383 | goto out; | |
4384 | } | |
1da177e4 | 4385 | |
75c096f7 | 4386 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4387 | goto out; |
1da177e4 | 4388 | |
ca364317 | 4389 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4390 | file_lock = locks_alloc_lock(); |
4391 | if (!file_lock) { | |
4392 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4393 | status = nfserr_jukebox; | |
4394 | goto out; | |
4395 | } | |
4396 | locks_init_lock(file_lock); | |
1da177e4 LT |
4397 | switch (lockt->lt_type) { |
4398 | case NFS4_READ_LT: | |
4399 | case NFS4_READW_LT: | |
21179d81 | 4400 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4401 | break; |
4402 | case NFS4_WRITE_LT: | |
4403 | case NFS4_WRITEW_LT: | |
21179d81 | 4404 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4405 | break; |
4406 | default: | |
2fdada03 | 4407 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4408 | status = nfserr_inval; |
4409 | goto out; | |
4410 | } | |
4411 | ||
20e9e2bc | 4412 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4413 | if (lo) |
21179d81 JL |
4414 | file_lock->fl_owner = (fl_owner_t)lo; |
4415 | file_lock->fl_pid = current->tgid; | |
4416 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4417 | |
21179d81 JL |
4418 | file_lock->fl_start = lockt->lt_offset; |
4419 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4420 | |
21179d81 | 4421 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4422 | |
21179d81 | 4423 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4424 | if (status) |
fd85b817 | 4425 | goto out; |
04da6e9d | 4426 | |
21179d81 | 4427 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4428 | status = nfserr_denied; |
21179d81 | 4429 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4430 | } |
4431 | out: | |
4432 | nfs4_unlock_state(); | |
21179d81 JL |
4433 | if (file_lock) |
4434 | locks_free_lock(file_lock); | |
1da177e4 LT |
4435 | return status; |
4436 | } | |
4437 | ||
b37ad28b | 4438 | __be32 |
ca364317 | 4439 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4440 | struct nfsd4_locku *locku) |
1da177e4 | 4441 | { |
eb2099f3 | 4442 | struct nfs4_lockowner *lo; |
dcef0413 | 4443 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4444 | struct file *filp = NULL; |
21179d81 | 4445 | struct file_lock *file_lock = NULL; |
b37ad28b | 4446 | __be32 status; |
b8dd7b9a | 4447 | int err; |
3320fef1 SK |
4448 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4449 | ||
1da177e4 LT |
4450 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4451 | (long long) locku->lu_offset, | |
4452 | (long long) locku->lu_length); | |
4453 | ||
4454 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4455 | return nfserr_inval; | |
4456 | ||
4457 | nfs4_lock_state(); | |
4458 | ||
9072d5c6 | 4459 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4460 | &locku->lu_stateid, NFS4_LOCK_STID, |
4461 | &stp, nn); | |
9072d5c6 | 4462 | if (status) |
1da177e4 | 4463 | goto out; |
f9d7562f BF |
4464 | filp = find_any_file(stp->st_file); |
4465 | if (!filp) { | |
4466 | status = nfserr_lock_range; | |
4467 | goto out; | |
4468 | } | |
21179d81 JL |
4469 | file_lock = locks_alloc_lock(); |
4470 | if (!file_lock) { | |
4471 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4472 | status = nfserr_jukebox; | |
4473 | goto out; | |
4474 | } | |
eb2099f3 | 4475 | lo = lockowner(stp->st_stateowner); |
21179d81 JL |
4476 | locks_init_lock(file_lock); |
4477 | file_lock->fl_type = F_UNLCK; | |
eb2099f3 | 4478 | file_lock->fl_owner = (fl_owner_t)lo; |
21179d81 JL |
4479 | file_lock->fl_pid = current->tgid; |
4480 | file_lock->fl_file = filp; | |
4481 | file_lock->fl_flags = FL_POSIX; | |
4482 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4483 | file_lock->fl_start = locku->lu_offset; | |
4484 | ||
4485 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4486 | locku->lu_length); | |
4487 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 4488 | |
21179d81 | 4489 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4490 | if (err) { |
fd85b817 | 4491 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4492 | goto out_nfserr; |
4493 | } | |
dcef0413 BF |
4494 | update_stateid(&stp->st_stid.sc_stateid); |
4495 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4496 | |
eb2099f3 BF |
4497 | if (nfsd4_has_session(cstate) && !check_for_locks(stp->st_file, lo)) { |
4498 | WARN_ON_ONCE(cstate->replay_owner); | |
4499 | release_lockowner(lo); | |
4500 | } | |
4501 | ||
1da177e4 | 4502 | out: |
9411b1d4 | 4503 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
4504 | if (!cstate->replay_owner) |
4505 | nfs4_unlock_state(); | |
21179d81 JL |
4506 | if (file_lock) |
4507 | locks_free_lock(file_lock); | |
1da177e4 LT |
4508 | return status; |
4509 | ||
4510 | out_nfserr: | |
b8dd7b9a | 4511 | status = nfserrno(err); |
1da177e4 LT |
4512 | goto out; |
4513 | } | |
4514 | ||
4515 | /* | |
4516 | * returns | |
4517 | * 1: locks held by lockowner | |
4518 | * 0: no locks held by lockowner | |
4519 | */ | |
4520 | static int | |
fe0750e5 | 4521 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4522 | { |
4523 | struct file_lock **flpp; | |
f9d7562f | 4524 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4525 | int status = 0; |
4526 | ||
b89f4321 | 4527 | lock_flocks(); |
1da177e4 | 4528 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4529 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4530 | status = 1; |
4531 | goto out; | |
796dadfd | 4532 | } |
1da177e4 LT |
4533 | } |
4534 | out: | |
b89f4321 | 4535 | unlock_flocks(); |
1da177e4 LT |
4536 | return status; |
4537 | } | |
4538 | ||
b37ad28b | 4539 | __be32 |
b591480b BF |
4540 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4541 | struct nfsd4_compound_state *cstate, | |
4542 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4543 | { |
4544 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4545 | struct nfs4_stateowner *sop; |
fe0750e5 | 4546 | struct nfs4_lockowner *lo; |
dcef0413 | 4547 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4548 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4549 | struct list_head matches; |
16bfdaaf | 4550 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4551 | __be32 status; |
7f2210fa | 4552 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4553 | |
4554 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4555 | clid->cl_boot, clid->cl_id); | |
4556 | ||
1da177e4 LT |
4557 | nfs4_lock_state(); |
4558 | ||
9b2ef62b BF |
4559 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
4560 | if (status) | |
4561 | goto out; | |
4562 | ||
3e9e3dbe | 4563 | status = nfserr_locks_held; |
3e9e3dbe | 4564 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4565 | |
9b531137 | 4566 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
4567 | if (sop->so_is_open_owner) |
4568 | continue; | |
06f1f864 BF |
4569 | if (!same_owner_str(sop, owner, clid)) |
4570 | continue; | |
4571 | list_for_each_entry(stp, &sop->so_stateids, | |
4572 | st_perstateowner) { | |
4573 | lo = lockowner(sop); | |
4574 | if (check_for_locks(stp->st_file, lo)) | |
4575 | goto out; | |
4576 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4577 | } |
3e9e3dbe N |
4578 | } |
4579 | /* Clients probably won't expect us to return with some (but not all) | |
4580 | * of the lockowner state released; so don't release any until all | |
4581 | * have been checked. */ | |
4582 | status = nfs_ok; | |
0fa822e4 | 4583 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4584 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4585 | lo_list); | |
0fa822e4 N |
4586 | /* unhash_stateowner deletes so_perclient only |
4587 | * for openowners. */ | |
fe0750e5 BF |
4588 | list_del(&lo->lo_list); |
4589 | release_lockowner(lo); | |
1da177e4 LT |
4590 | } |
4591 | out: | |
4592 | nfs4_unlock_state(); | |
4593 | return status; | |
4594 | } | |
4595 | ||
4596 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4597 | alloc_reclaim(void) |
1da177e4 | 4598 | { |
a55370a3 | 4599 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4600 | } |
4601 | ||
0ce0c2b5 | 4602 | bool |
52e19c09 | 4603 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4604 | { |
0ce0c2b5 | 4605 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4606 | |
52e19c09 | 4607 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4608 | return (crp && crp->cr_clp); |
c7b9a459 N |
4609 | } |
4610 | ||
1da177e4 LT |
4611 | /* |
4612 | * failure => all reset bets are off, nfserr_no_grace... | |
4613 | */ | |
772a9bbb | 4614 | struct nfs4_client_reclaim * |
52e19c09 | 4615 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4616 | { |
4617 | unsigned int strhashval; | |
772a9bbb | 4618 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4619 | |
a55370a3 N |
4620 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4621 | crp = alloc_reclaim(); | |
772a9bbb JL |
4622 | if (crp) { |
4623 | strhashval = clientstr_hashval(name); | |
4624 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4625 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4626 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4627 | crp->cr_clp = NULL; |
52e19c09 | 4628 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4629 | } |
4630 | return crp; | |
1da177e4 LT |
4631 | } |
4632 | ||
ce30e539 | 4633 | void |
52e19c09 | 4634 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4635 | { |
4636 | list_del(&crp->cr_strhash); | |
4637 | kfree(crp); | |
52e19c09 | 4638 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4639 | } |
4640 | ||
2a4317c5 | 4641 | void |
52e19c09 | 4642 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4643 | { |
4644 | struct nfs4_client_reclaim *crp = NULL; | |
4645 | int i; | |
4646 | ||
1da177e4 | 4647 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4648 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4649 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4650 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4651 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4652 | } |
4653 | } | |
063b0fb9 | 4654 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4655 | } |
4656 | ||
4657 | /* | |
4658 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4659 | struct nfs4_client_reclaim * |
52e19c09 | 4660 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4661 | { |
4662 | unsigned int strhashval; | |
1da177e4 LT |
4663 | struct nfs4_client_reclaim *crp = NULL; |
4664 | ||
278c931c | 4665 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4666 | |
278c931c | 4667 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4668 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4669 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4670 | return crp; |
4671 | } | |
4672 | } | |
4673 | return NULL; | |
4674 | } | |
4675 | ||
4676 | /* | |
4677 | * Called from OPEN. Look for clientid in reclaim list. | |
4678 | */ | |
b37ad28b | 4679 | __be32 |
3320fef1 | 4680 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4681 | { |
a52d726b JL |
4682 | struct nfs4_client *clp; |
4683 | ||
4684 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4685 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4686 | if (clp == NULL) |
4687 | return nfserr_reclaim_bad; | |
4688 | ||
4689 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4690 | } |
4691 | ||
65178db4 BS |
4692 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4693 | ||
44e34da6 BS |
4694 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4695 | { | |
221a6876 BF |
4696 | if (mark_client_expired(clp)) |
4697 | return 0; | |
44e34da6 BS |
4698 | expire_client(clp); |
4699 | return 1; | |
4700 | } | |
4701 | ||
184c1847 BS |
4702 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4703 | { | |
4704 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4705 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4706 | printk(KERN_INFO "NFS Client: %s\n", buf); |
4707 | return 1; | |
4708 | } | |
4709 | ||
4710 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
4711 | const char *type) | |
4712 | { | |
4713 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4714 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4715 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
4716 | } | |
4717 | ||
fc29171f BS |
4718 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) |
4719 | { | |
4720 | struct nfs4_openowner *oop; | |
4721 | struct nfs4_lockowner *lop, *lo_next; | |
4722 | struct nfs4_ol_stateid *stp, *st_next; | |
4723 | u64 count = 0; | |
4724 | ||
4725 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
4726 | list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { | |
4727 | list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { | |
4728 | if (func) | |
4729 | func(lop); | |
4730 | if (++count == max) | |
4731 | return count; | |
4732 | } | |
4733 | } | |
4734 | } | |
4735 | ||
4736 | return count; | |
4737 | } | |
4738 | ||
4739 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
4740 | { | |
4741 | return nfsd_foreach_client_lock(clp, max, release_lockowner); | |
4742 | } | |
4743 | ||
184c1847 BS |
4744 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
4745 | { | |
4746 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
4747 | nfsd_print_count(clp, count, "locked files"); | |
4748 | return count; | |
4749 | } | |
4750 | ||
4dbdbda8 BS |
4751 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
4752 | { | |
4753 | struct nfs4_openowner *oop, *next; | |
4754 | u64 count = 0; | |
4755 | ||
4756 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
4757 | if (func) | |
4758 | func(oop); | |
4759 | if (++count == max) | |
4760 | break; | |
4761 | } | |
4762 | ||
4763 | return count; | |
4764 | } | |
4765 | ||
4766 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
4767 | { | |
4768 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
4769 | } | |
4770 | ||
184c1847 BS |
4771 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
4772 | { | |
4773 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
4774 | nfsd_print_count(clp, count, "open files"); | |
4775 | return count; | |
4776 | } | |
4777 | ||
269de30f BS |
4778 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
4779 | struct list_head *victims) | |
4780 | { | |
4781 | struct nfs4_delegation *dp, *next; | |
4782 | u64 count = 0; | |
4783 | ||
4784 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { | |
4785 | if (victims) | |
4786 | list_move(&dp->dl_recall_lru, victims); | |
4787 | if (++count == max) | |
4788 | break; | |
4789 | } | |
4790 | return count; | |
4791 | } | |
4792 | ||
4793 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
4794 | { | |
4795 | struct nfs4_delegation *dp, *next; | |
4796 | LIST_HEAD(victims); | |
4797 | u64 count; | |
4798 | ||
4799 | spin_lock(&recall_lock); | |
4800 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4801 | spin_unlock(&recall_lock); | |
4802 | ||
4803 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
3bd64a5b | 4804 | revoke_delegation(dp); |
269de30f BS |
4805 | |
4806 | return count; | |
4807 | } | |
4808 | ||
4809 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
4810 | { | |
4811 | struct nfs4_delegation *dp, *next; | |
4812 | LIST_HEAD(victims); | |
4813 | u64 count; | |
4814 | ||
4815 | spin_lock(&recall_lock); | |
4816 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4817 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4818 | nfsd_break_one_deleg(dp); | |
4819 | spin_unlock(&recall_lock); | |
4820 | ||
4821 | return count; | |
4822 | } | |
4823 | ||
184c1847 BS |
4824 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
4825 | { | |
4826 | u64 count = 0; | |
4827 | ||
4828 | spin_lock(&recall_lock); | |
4829 | count = nfsd_find_all_delegations(clp, max, NULL); | |
4830 | spin_unlock(&recall_lock); | |
4831 | ||
4832 | nfsd_print_count(clp, count, "delegations"); | |
4833 | return count; | |
4834 | } | |
4835 | ||
44e34da6 | 4836 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
4837 | { |
4838 | struct nfs4_client *clp, *next; | |
44e34da6 | 4839 | u64 count = 0; |
3320fef1 | 4840 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 4841 | |
44e34da6 BS |
4842 | if (!nfsd_netns_ready(nn)) |
4843 | return 0; | |
4844 | ||
5ed58bb2 | 4845 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
4846 | count += func(clp, max - count); |
4847 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
4848 | break; |
4849 | } | |
65178db4 | 4850 | |
44e34da6 BS |
4851 | return count; |
4852 | } | |
4853 | ||
6c1e82a4 BS |
4854 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
4855 | { | |
4856 | struct nfs4_client *clp; | |
4857 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
4858 | ||
4859 | if (!nfsd_netns_ready(nn)) | |
4860 | return NULL; | |
4861 | ||
4862 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
4863 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
4864 | return clp; | |
4865 | } | |
4866 | return NULL; | |
4867 | } | |
4868 | ||
65178db4 BS |
4869 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
4870 | ||
ac4d8ff2 | 4871 | /* initialization to perform at module load time: */ |
1da177e4 | 4872 | |
72083396 | 4873 | void |
ac4d8ff2 | 4874 | nfs4_state_init(void) |
1da177e4 | 4875 | { |
ac4d8ff2 N |
4876 | } |
4877 | ||
c2f1a551 MS |
4878 | /* |
4879 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4880 | * client may quite reasonably hang on to a delegation as long as it has | |
4881 | * the inode cached. This becomes an obvious problem the first time a | |
4882 | * client's inode cache approaches the size of the server's total memory. | |
4883 | * | |
4884 | * For now we avoid this problem by imposing a hard limit on the number | |
4885 | * of delegations, which varies according to the server's memory size. | |
4886 | */ | |
4887 | static void | |
4888 | set_max_delegations(void) | |
4889 | { | |
4890 | /* | |
4891 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4892 | * estimates suggest that in the worst case (where every delegation | |
4893 | * is for a different inode), a delegation could take about 1.5K, | |
4894 | * giving a worst case usage of about 6% of memory. | |
4895 | */ | |
4896 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4897 | } | |
4898 | ||
d85ed443 | 4899 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
4900 | { |
4901 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4902 | int i; | |
4903 | ||
4904 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
4905 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4906 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 4907 | goto err; |
0a7ec377 SK |
4908 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
4909 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4910 | if (!nn->unconf_id_hashtbl) | |
4911 | goto err_unconf_id; | |
9b531137 SK |
4912 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
4913 | OWNER_HASH_SIZE, GFP_KERNEL); | |
4914 | if (!nn->ownerstr_hashtbl) | |
4915 | goto err_ownerstr; | |
20e9e2bc SK |
4916 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
4917 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); | |
4918 | if (!nn->lockowner_ino_hashtbl) | |
4919 | goto err_lockowner_ino; | |
1872de0e SK |
4920 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
4921 | SESSION_HASH_SIZE, GFP_KERNEL); | |
4922 | if (!nn->sessionid_hashtbl) | |
4923 | goto err_sessionid; | |
8daae4dc | 4924 | |
382a62e7 | 4925 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 4926 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 4927 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 4928 | } |
9b531137 SK |
4929 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
4930 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
20e9e2bc SK |
4931 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4932 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); | |
1872de0e SK |
4933 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4934 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 4935 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 4936 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 4937 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 4938 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 4939 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 4940 | spin_lock_init(&nn->client_lock); |
8daae4dc | 4941 | |
09121281 | 4942 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 4943 | get_net(net); |
09121281 | 4944 | |
8daae4dc | 4945 | return 0; |
382a62e7 | 4946 | |
1872de0e SK |
4947 | err_sessionid: |
4948 | kfree(nn->lockowner_ino_hashtbl); | |
20e9e2bc SK |
4949 | err_lockowner_ino: |
4950 | kfree(nn->ownerstr_hashtbl); | |
9b531137 SK |
4951 | err_ownerstr: |
4952 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
4953 | err_unconf_id: |
4954 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
4955 | err: |
4956 | return -ENOMEM; | |
8daae4dc SK |
4957 | } |
4958 | ||
4959 | static void | |
4dce0ac9 | 4960 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
4961 | { |
4962 | int i; | |
4963 | struct nfs4_client *clp = NULL; | |
4964 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
a99454aa | 4965 | struct rb_node *node, *tmp; |
8daae4dc SK |
4966 | |
4967 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
4968 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
4969 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4970 | destroy_client(clp); | |
4971 | } | |
4972 | } | |
a99454aa SK |
4973 | |
4974 | node = rb_first(&nn->unconf_name_tree); | |
4975 | while (node != NULL) { | |
4976 | tmp = node; | |
4977 | node = rb_next(tmp); | |
4978 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
4979 | rb_erase(tmp, &nn->unconf_name_tree); | |
4980 | destroy_client(clp); | |
4981 | } | |
4982 | ||
1872de0e | 4983 | kfree(nn->sessionid_hashtbl); |
20e9e2bc | 4984 | kfree(nn->lockowner_ino_hashtbl); |
9b531137 | 4985 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 4986 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 4987 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 4988 | put_net(net); |
8daae4dc SK |
4989 | } |
4990 | ||
f252bc68 | 4991 | int |
d85ed443 | 4992 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 4993 | { |
5e1533c7 | 4994 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
4995 | int ret; |
4996 | ||
d85ed443 | 4997 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
4998 | if (ret) |
4999 | return ret; | |
5e1533c7 | 5000 | nfsd4_client_tracking_init(net); |
2c142baa | 5001 | nn->boot_time = get_seconds(); |
5ccb0066 | 5002 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5003 | nn->grace_ended = false; |
d85ed443 | 5004 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5005 | nn->nfsd4_grace, net); |
5006 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5007 | return 0; |
5008 | } | |
5009 | ||
5010 | /* initialization to perform when the nfsd service is started: */ | |
5011 | ||
5012 | int | |
5013 | nfs4_state_start(void) | |
5014 | { | |
5015 | int ret; | |
5016 | ||
b5a1a81e | 5017 | ret = set_callback_cred(); |
d85ed443 SK |
5018 | if (ret) |
5019 | return -ENOMEM; | |
58da282b | 5020 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5021 | if (laundry_wq == NULL) { |
5022 | ret = -ENOMEM; | |
5023 | goto out_recovery; | |
5024 | } | |
b5a1a81e BF |
5025 | ret = nfsd4_create_callback_queue(); |
5026 | if (ret) | |
5027 | goto out_free_laundry; | |
09121281 | 5028 | |
c2f1a551 | 5029 | set_max_delegations(); |
d85ed443 | 5030 | |
b5a1a81e | 5031 | return 0; |
d85ed443 | 5032 | |
b5a1a81e BF |
5033 | out_free_laundry: |
5034 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5035 | out_recovery: |
b5a1a81e | 5036 | return ret; |
1da177e4 LT |
5037 | } |
5038 | ||
ac55fdc4 | 5039 | /* should be called with the state lock held */ |
f252bc68 | 5040 | void |
4dce0ac9 | 5041 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5042 | { |
1da177e4 | 5043 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5044 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5045 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5046 | |
4dce0ac9 SK |
5047 | cancel_delayed_work_sync(&nn->laundromat_work); |
5048 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5049 | |
1da177e4 LT |
5050 | INIT_LIST_HEAD(&reaplist); |
5051 | spin_lock(&recall_lock); | |
e8c69d17 | 5052 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
5053 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
5054 | list_move(&dp->dl_recall_lru, &reaplist); | |
5055 | } | |
5056 | spin_unlock(&recall_lock); | |
5057 | list_for_each_safe(pos, next, &reaplist) { | |
5058 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 5059 | destroy_delegation(dp); |
1da177e4 LT |
5060 | } |
5061 | ||
3320fef1 | 5062 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5063 | nfs4_state_destroy_net(net); |
1da177e4 LT |
5064 | } |
5065 | ||
5066 | void | |
5067 | nfs4_state_shutdown(void) | |
5068 | { | |
5e8d5c29 | 5069 | destroy_workqueue(laundry_wq); |
c3935e30 | 5070 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5071 | } |
8b70484c TM |
5072 | |
5073 | static void | |
5074 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5075 | { | |
37c593c5 TM |
5076 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5077 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5078 | } |
5079 | ||
5080 | static void | |
5081 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5082 | { | |
37c593c5 TM |
5083 | if (cstate->minorversion) { |
5084 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5085 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5086 | } | |
5087 | } | |
5088 | ||
5089 | void | |
5090 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5091 | { | |
5092 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5093 | } |
5094 | ||
62cd4a59 TM |
5095 | /* |
5096 | * functions to set current state id | |
5097 | */ | |
9428fe1a TM |
5098 | void |
5099 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5100 | { | |
5101 | put_stateid(cstate, &odp->od_stateid); | |
5102 | } | |
5103 | ||
8b70484c TM |
5104 | void |
5105 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5106 | { | |
5107 | put_stateid(cstate, &open->op_stateid); | |
5108 | } | |
5109 | ||
62cd4a59 TM |
5110 | void |
5111 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5112 | { | |
5113 | put_stateid(cstate, &close->cl_stateid); | |
5114 | } | |
5115 | ||
5116 | void | |
5117 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5118 | { | |
5119 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5120 | } | |
5121 | ||
5122 | /* | |
5123 | * functions to consume current state id | |
5124 | */ | |
1e97b519 | 5125 | |
9428fe1a TM |
5126 | void |
5127 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5128 | { | |
5129 | get_stateid(cstate, &odp->od_stateid); | |
5130 | } | |
5131 | ||
5132 | void | |
5133 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5134 | { | |
5135 | get_stateid(cstate, &drp->dr_stateid); | |
5136 | } | |
5137 | ||
1e97b519 TM |
5138 | void |
5139 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5140 | { | |
5141 | get_stateid(cstate, &fsp->fr_stateid); | |
5142 | } | |
5143 | ||
5144 | void | |
5145 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5146 | { | |
5147 | get_stateid(cstate, &setattr->sa_stateid); | |
5148 | } | |
5149 | ||
8b70484c TM |
5150 | void |
5151 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5152 | { | |
5153 | get_stateid(cstate, &close->cl_stateid); | |
5154 | } | |
5155 | ||
5156 | void | |
62cd4a59 | 5157 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5158 | { |
62cd4a59 | 5159 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5160 | } |
30813e27 TM |
5161 | |
5162 | void | |
5163 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5164 | { | |
5165 | get_stateid(cstate, &read->rd_stateid); | |
5166 | } | |
5167 | ||
5168 | void | |
5169 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5170 | { | |
5171 | get_stateid(cstate, &write->wr_stateid); | |
5172 | } |