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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" |
0a3adade | 45 | #include "vfs.h" |
bfa4b365 | 46 | #include "current_stateid.h" |
1da177e4 | 47 | |
5e1533c7 SK |
48 | #include "netns.h" |
49 | ||
1da177e4 LT |
50 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
51 | ||
f32f3c2d BF |
52 | #define all_ones {{~0,~0},~0} |
53 | static const stateid_t one_stateid = { | |
54 | .si_generation = ~0, | |
55 | .si_opaque = all_ones, | |
56 | }; | |
57 | static const stateid_t zero_stateid = { | |
58 | /* all fields zero */ | |
59 | }; | |
19ff0f28 TM |
60 | static const stateid_t currentstateid = { |
61 | .si_generation = 1, | |
62 | }; | |
f32f3c2d | 63 | |
ec6b5d7b | 64 | static u64 current_sessionid = 1; |
fd39ca9a | 65 | |
f32f3c2d BF |
66 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
67 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 68 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 69 | |
1da177e4 | 70 | /* forward declarations */ |
fe0750e5 | 71 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 72 | |
8b671b80 BF |
73 | /* Locking: */ |
74 | ||
75 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 76 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 77 | |
8b671b80 BF |
78 | /* |
79 | * Currently used for the del_recall_lru and file hash table. In an | |
80 | * effort to decrease the scope of the client_mutex, this spinlock may | |
81 | * eventually cover more: | |
82 | */ | |
83 | static DEFINE_SPINLOCK(recall_lock); | |
84 | ||
fe0750e5 BF |
85 | static struct kmem_cache *openowner_slab = NULL; |
86 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
87 | static struct kmem_cache *file_slab = NULL; |
88 | static struct kmem_cache *stateid_slab = NULL; | |
89 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 90 | |
1da177e4 LT |
91 | void |
92 | nfs4_lock_state(void) | |
93 | { | |
353ab6e9 | 94 | mutex_lock(&client_mutex); |
1da177e4 LT |
95 | } |
96 | ||
66b2b9b2 | 97 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 98 | |
66b2b9b2 BF |
99 | void nfsd4_put_session(struct nfsd4_session *ses) |
100 | { | |
101 | atomic_dec(&ses->se_ref); | |
102 | } | |
103 | ||
104 | static bool is_session_dead(struct nfsd4_session *ses) | |
508dc6e1 | 105 | { |
66b2b9b2 BF |
106 | return ses->se_flags & NFS4_SESSION_DEAD; |
107 | } | |
108 | ||
109 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses) | |
110 | { | |
111 | if (atomic_read(&ses->se_ref)) | |
112 | return nfserr_jukebox; | |
113 | ses->se_flags |= NFS4_SESSION_DEAD; | |
114 | return nfs_ok; | |
508dc6e1 BH |
115 | } |
116 | ||
66b2b9b2 | 117 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
508dc6e1 | 118 | { |
66b2b9b2 BF |
119 | if (is_session_dead(ses)) |
120 | return nfserr_badsession; | |
121 | atomic_inc(&ses->se_ref); | |
122 | return nfs_ok; | |
508dc6e1 BH |
123 | } |
124 | ||
1da177e4 LT |
125 | void |
126 | nfs4_unlock_state(void) | |
127 | { | |
353ab6e9 | 128 | mutex_unlock(&client_mutex); |
1da177e4 LT |
129 | } |
130 | ||
221a6876 BF |
131 | static bool is_client_expired(struct nfs4_client *clp) |
132 | { | |
133 | return clp->cl_time == 0; | |
134 | } | |
135 | ||
136 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
137 | { | |
138 | if (atomic_read(&clp->cl_refcount)) | |
139 | return nfserr_jukebox; | |
140 | clp->cl_time = 0; | |
141 | return nfs_ok; | |
142 | } | |
143 | ||
144 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
145 | { | |
146 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
147 | __be32 ret; | |
148 | ||
149 | spin_lock(&nn->client_lock); | |
150 | ret = mark_client_expired_locked(clp); | |
151 | spin_unlock(&nn->client_lock); | |
152 | return ret; | |
153 | } | |
154 | ||
155 | static __be32 get_client_locked(struct nfs4_client *clp) | |
156 | { | |
157 | if (is_client_expired(clp)) | |
158 | return nfserr_expired; | |
159 | atomic_inc(&clp->cl_refcount); | |
160 | return nfs_ok; | |
161 | } | |
162 | ||
163 | /* must be called under the client_lock */ | |
164 | static inline void | |
165 | renew_client_locked(struct nfs4_client *clp) | |
166 | { | |
167 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
168 | ||
169 | if (is_client_expired(clp)) { | |
170 | WARN_ON(1); | |
171 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
172 | __func__, | |
173 | clp->cl_clientid.cl_boot, | |
174 | clp->cl_clientid.cl_id); | |
175 | return; | |
176 | } | |
177 | ||
178 | dprintk("renewing client (clientid %08x/%08x)\n", | |
179 | clp->cl_clientid.cl_boot, | |
180 | clp->cl_clientid.cl_id); | |
181 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
182 | clp->cl_time = get_seconds(); | |
183 | } | |
184 | ||
185 | static inline void | |
186 | renew_client(struct nfs4_client *clp) | |
187 | { | |
188 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
189 | ||
190 | spin_lock(&nn->client_lock); | |
191 | renew_client_locked(clp); | |
192 | spin_unlock(&nn->client_lock); | |
193 | } | |
194 | ||
195 | void put_client_renew_locked(struct nfs4_client *clp) | |
196 | { | |
197 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
198 | return; | |
199 | if (!is_client_expired(clp)) | |
200 | renew_client_locked(clp); | |
201 | } | |
202 | ||
203 | void put_client_renew(struct nfs4_client *clp) | |
204 | { | |
205 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
206 | ||
207 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) | |
208 | return; | |
209 | if (!is_client_expired(clp)) | |
210 | renew_client_locked(clp); | |
211 | spin_unlock(&nn->client_lock); | |
212 | } | |
213 | ||
214 | ||
1da177e4 LT |
215 | static inline u32 |
216 | opaque_hashval(const void *ptr, int nbytes) | |
217 | { | |
218 | unsigned char *cptr = (unsigned char *) ptr; | |
219 | ||
220 | u32 x = 0; | |
221 | while (nbytes--) { | |
222 | x *= 37; | |
223 | x += *cptr++; | |
224 | } | |
225 | return x; | |
226 | } | |
227 | ||
32513b40 BF |
228 | static void nfsd4_free_file(struct nfs4_file *f) |
229 | { | |
230 | kmem_cache_free(file_slab, f); | |
231 | } | |
232 | ||
13cd2184 N |
233 | static inline void |
234 | put_nfs4_file(struct nfs4_file *fi) | |
235 | { | |
8b671b80 | 236 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
89876f8c | 237 | hlist_del(&fi->fi_hash); |
8b671b80 BF |
238 | spin_unlock(&recall_lock); |
239 | iput(fi->fi_inode); | |
32513b40 | 240 | nfsd4_free_file(fi); |
8b671b80 | 241 | } |
13cd2184 N |
242 | } |
243 | ||
244 | static inline void | |
245 | get_nfs4_file(struct nfs4_file *fi) | |
246 | { | |
8b671b80 | 247 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
248 | } |
249 | ||
ef0f3390 | 250 | static int num_delegations; |
697ce9be | 251 | unsigned long max_delegations; |
ef0f3390 N |
252 | |
253 | /* | |
254 | * Open owner state (share locks) | |
255 | */ | |
256 | ||
16bfdaaf BF |
257 | /* hash tables for lock and open owners */ |
258 | #define OWNER_HASH_BITS 8 | |
259 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
260 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 261 | |
16bfdaaf | 262 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
263 | { |
264 | unsigned int ret; | |
265 | ||
266 | ret = opaque_hashval(ownername->data, ownername->len); | |
267 | ret += clientid; | |
16bfdaaf | 268 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 269 | } |
ef0f3390 | 270 | |
ef0f3390 N |
271 | /* hash table for nfs4_file */ |
272 | #define FILE_HASH_BITS 8 | |
273 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 274 | |
ddc04c41 BF |
275 | static unsigned int file_hashval(struct inode *ino) |
276 | { | |
277 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
278 | return hash_ptr(ino, FILE_HASH_BITS); | |
279 | } | |
280 | ||
89876f8c | 281 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 282 | |
998db52c | 283 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 284 | { |
063b0fb9 | 285 | WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); |
f9d7562f BF |
286 | atomic_inc(&fp->fi_access[oflag]); |
287 | } | |
288 | ||
998db52c BF |
289 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
290 | { | |
291 | if (oflag == O_RDWR) { | |
292 | __nfs4_file_get_access(fp, O_RDONLY); | |
293 | __nfs4_file_get_access(fp, O_WRONLY); | |
294 | } else | |
295 | __nfs4_file_get_access(fp, oflag); | |
296 | } | |
297 | ||
298 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
299 | { |
300 | if (fp->fi_fds[oflag]) { | |
301 | fput(fp->fi_fds[oflag]); | |
302 | fp->fi_fds[oflag] = NULL; | |
303 | } | |
304 | } | |
305 | ||
998db52c | 306 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
307 | { |
308 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 309 | nfs4_file_put_fd(fp, oflag); |
0c7c3e67 | 310 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
3d02fa29 | 311 | nfs4_file_put_fd(fp, O_RDWR); |
f9d7562f BF |
312 | } |
313 | } | |
314 | ||
998db52c BF |
315 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
316 | { | |
317 | if (oflag == O_RDWR) { | |
318 | __nfs4_file_put_access(fp, O_RDONLY); | |
319 | __nfs4_file_put_access(fp, O_WRONLY); | |
320 | } else | |
321 | __nfs4_file_put_access(fp, oflag); | |
322 | } | |
323 | ||
3abdb607 BF |
324 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
325 | kmem_cache *slab) | |
2a74aba7 | 326 | { |
3abdb607 BF |
327 | struct idr *stateids = &cl->cl_stateids; |
328 | static int min_stateid = 0; | |
329 | struct nfs4_stid *stid; | |
6136d2b4 | 330 | int new_id; |
2a74aba7 | 331 | |
3abdb607 BF |
332 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
333 | if (!stid) | |
334 | return NULL; | |
335 | ||
ebd6c707 TH |
336 | new_id = idr_alloc(stateids, stid, min_stateid, 0, GFP_KERNEL); |
337 | if (new_id < 0) | |
3abdb607 | 338 | goto out_free; |
2a74aba7 | 339 | stid->sc_client = cl; |
3abdb607 BF |
340 | stid->sc_type = 0; |
341 | stid->sc_stateid.si_opaque.so_id = new_id; | |
342 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 343 | /* Will be incremented before return to client: */ |
3abdb607 | 344 | stid->sc_stateid.si_generation = 0; |
996e0938 | 345 | |
996e0938 | 346 | /* |
3abdb607 BF |
347 | * It shouldn't be a problem to reuse an opaque stateid value. |
348 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
349 | * example, a stray write retransmission could be accepted by | |
350 | * the server when it should have been rejected. Therefore, | |
351 | * adopt a trick from the sctp code to attempt to maximize the | |
352 | * amount of time until an id is reused, by ensuring they always | |
353 | * "increase" (mod INT_MAX): | |
996e0938 | 354 | */ |
3abdb607 BF |
355 | |
356 | min_stateid = new_id+1; | |
357 | if (min_stateid == INT_MAX) | |
358 | min_stateid = 0; | |
359 | return stid; | |
360 | out_free: | |
2c44a234 | 361 | kmem_cache_free(slab, stid); |
3abdb607 | 362 | return NULL; |
2a74aba7 BF |
363 | } |
364 | ||
4cdc951b BF |
365 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
366 | { | |
367 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
368 | } | |
369 | ||
1da177e4 | 370 | static struct nfs4_delegation * |
dcef0413 | 371 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
372 | { |
373 | struct nfs4_delegation *dp; | |
374 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
375 | |
376 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
377 | /* |
378 | * Major work on the lease subsystem (for example, to support | |
379 | * calbacks on stat) will be required before we can support | |
380 | * write delegations properly. | |
381 | */ | |
382 | if (type != NFS4_OPEN_DELEGATE_READ) | |
383 | return NULL; | |
47f9940c MS |
384 | if (fp->fi_had_conflict) |
385 | return NULL; | |
c2f1a551 | 386 | if (num_delegations > max_delegations) |
ef0f3390 | 387 | return NULL; |
996e0938 | 388 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 389 | if (dp == NULL) |
1da177e4 | 390 | return dp; |
3abdb607 | 391 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
2a74aba7 BF |
392 | /* |
393 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
394 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
395 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
396 | */ |
397 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 398 | num_delegations++; |
ea1da636 N |
399 | INIT_LIST_HEAD(&dp->dl_perfile); |
400 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 401 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 402 | get_nfs4_file(fp); |
1da177e4 | 403 | dp->dl_file = fp; |
1da177e4 | 404 | dp->dl_type = type; |
6c02eaa1 | 405 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
406 | dp->dl_time = 0; |
407 | atomic_set(&dp->dl_count, 1); | |
57725155 | 408 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
409 | return dp; |
410 | } | |
411 | ||
68a33961 | 412 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
413 | { |
414 | struct idr *stateids = &s->sc_client->cl_stateids; | |
415 | ||
416 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
417 | } |
418 | ||
1da177e4 LT |
419 | void |
420 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
421 | { | |
422 | if (atomic_dec_and_test(&dp->dl_count)) { | |
68a33961 | 423 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 424 | num_delegations--; |
1da177e4 LT |
425 | } |
426 | } | |
427 | ||
acfdf5c3 | 428 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 429 | { |
acfdf5c3 BF |
430 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
431 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
432 | fp->fi_lease = NULL; | |
4ee63624 | 433 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
434 | fp->fi_deleg_file = NULL; |
435 | } | |
1da177e4 LT |
436 | } |
437 | ||
6136d2b4 BF |
438 | static void unhash_stid(struct nfs4_stid *s) |
439 | { | |
3abdb607 | 440 | s->sc_type = 0; |
6136d2b4 BF |
441 | } |
442 | ||
1da177e4 LT |
443 | /* Called under the state lock. */ |
444 | static void | |
445 | unhash_delegation(struct nfs4_delegation *dp) | |
446 | { | |
6136d2b4 | 447 | unhash_stid(&dp->dl_stid); |
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; | |
456 | remove_stid(&dp->dl_stid); | |
1da177e4 LT |
457 | nfs4_put_delegation(dp); |
458 | } | |
459 | ||
460 | /* | |
461 | * SETCLIENTID state | |
462 | */ | |
463 | ||
ddc04c41 BF |
464 | static unsigned int clientid_hashval(u32 id) |
465 | { | |
466 | return id & CLIENT_HASH_MASK; | |
467 | } | |
468 | ||
469 | static unsigned int clientstr_hashval(const char *name) | |
470 | { | |
471 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
472 | } | |
473 | ||
f9d7562f BF |
474 | /* |
475 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
476 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
477 | * only what share bits are currently in force, but also what | |
478 | * combinations of share bits previous opens have used. This allows us | |
479 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
480 | * return an error if the client attempt to downgrade to a combination | |
481 | * of share bits not explicable by closing some of its previous opens. | |
482 | * | |
483 | * XXX: This enforcement is actually incomplete, since we don't keep | |
484 | * track of access/deny bit combinations; so, e.g., we allow: | |
485 | * | |
486 | * OPEN allow read, deny write | |
487 | * OPEN allow both, deny none | |
488 | * DOWNGRADE allow read, deny none | |
489 | * | |
490 | * which we should reject. | |
491 | */ | |
5ae037e5 JL |
492 | static unsigned int |
493 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 494 | int i; |
5ae037e5 | 495 | unsigned int access = 0; |
f9d7562f | 496 | |
f9d7562f BF |
497 | for (i = 1; i < 4; i++) { |
498 | if (test_bit(i, &bmap)) | |
5ae037e5 | 499 | access |= i; |
f9d7562f | 500 | } |
5ae037e5 | 501 | return access; |
f9d7562f BF |
502 | } |
503 | ||
3a328614 | 504 | static bool |
dcef0413 | 505 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
506 | unsigned int access, deny; |
507 | ||
5ae037e5 JL |
508 | access = bmap_to_share_mode(stp->st_access_bmap); |
509 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 510 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
511 | return false; |
512 | return true; | |
f9d7562f BF |
513 | } |
514 | ||
82c5ff1b JL |
515 | /* set share access for a given stateid */ |
516 | static inline void | |
517 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
518 | { | |
519 | __set_bit(access, &stp->st_access_bmap); | |
520 | } | |
521 | ||
522 | /* clear share access for a given stateid */ | |
523 | static inline void | |
524 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
525 | { | |
526 | __clear_bit(access, &stp->st_access_bmap); | |
527 | } | |
528 | ||
529 | /* test whether a given stateid has access */ | |
530 | static inline bool | |
531 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
532 | { | |
533 | return test_bit(access, &stp->st_access_bmap); | |
534 | } | |
535 | ||
ce0fc43c JL |
536 | /* set share deny for a given stateid */ |
537 | static inline void | |
538 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
539 | { | |
540 | __set_bit(access, &stp->st_deny_bmap); | |
541 | } | |
542 | ||
543 | /* clear share deny for a given stateid */ | |
544 | static inline void | |
545 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
546 | { | |
547 | __clear_bit(access, &stp->st_deny_bmap); | |
548 | } | |
549 | ||
550 | /* test whether a given stateid is denying specific access */ | |
551 | static inline bool | |
552 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
553 | { | |
554 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
555 | } |
556 | ||
557 | static int nfs4_access_to_omode(u32 access) | |
558 | { | |
8f34a430 | 559 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
560 | case NFS4_SHARE_ACCESS_READ: |
561 | return O_RDONLY; | |
562 | case NFS4_SHARE_ACCESS_WRITE: | |
563 | return O_WRONLY; | |
564 | case NFS4_SHARE_ACCESS_BOTH: | |
565 | return O_RDWR; | |
566 | } | |
063b0fb9 BF |
567 | WARN_ON_ONCE(1); |
568 | return O_RDONLY; | |
f9d7562f BF |
569 | } |
570 | ||
82c5ff1b JL |
571 | /* release all access and file references for a given stateid */ |
572 | static void | |
573 | release_all_access(struct nfs4_ol_stateid *stp) | |
574 | { | |
575 | int i; | |
576 | ||
577 | for (i = 1; i < 4; i++) { | |
578 | if (test_access(i, stp)) | |
579 | nfs4_file_put_access(stp->st_file, | |
580 | nfs4_access_to_omode(i)); | |
581 | clear_access(i, stp); | |
582 | } | |
583 | } | |
584 | ||
dcef0413 | 585 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 586 | { |
529d7b2a BF |
587 | list_del(&stp->st_perfile); |
588 | list_del(&stp->st_perstateowner); | |
589 | } | |
590 | ||
dcef0413 | 591 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 592 | { |
82c5ff1b | 593 | release_all_access(stp); |
a96e5b90 | 594 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
595 | stp->st_file = NULL; |
596 | } | |
597 | ||
dcef0413 | 598 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 599 | { |
68a33961 BF |
600 | remove_stid(&stp->st_stid); |
601 | kmem_cache_free(stateid_slab, stp); | |
529d7b2a BF |
602 | } |
603 | ||
dcef0413 | 604 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
605 | { |
606 | struct file *file; | |
607 | ||
608 | unhash_generic_stateid(stp); | |
6136d2b4 | 609 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
610 | file = find_any_file(stp->st_file); |
611 | if (file) | |
fe0750e5 | 612 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 613 | close_generic_stateid(stp); |
529d7b2a BF |
614 | free_generic_stateid(stp); |
615 | } | |
616 | ||
fe0750e5 | 617 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 618 | { |
dcef0413 | 619 | struct nfs4_ol_stateid *stp; |
529d7b2a | 620 | |
fe0750e5 BF |
621 | list_del(&lo->lo_owner.so_strhash); |
622 | list_del(&lo->lo_perstateid); | |
009673b4 | 623 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
624 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
625 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 626 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
627 | release_lock_stateid(stp); |
628 | } | |
629 | } | |
630 | ||
fe0750e5 | 631 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 632 | { |
fe0750e5 BF |
633 | unhash_lockowner(lo); |
634 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
635 | } |
636 | ||
637 | static void | |
dcef0413 | 638 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 639 | { |
fe0750e5 | 640 | struct nfs4_lockowner *lo; |
529d7b2a BF |
641 | |
642 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
643 | lo = list_entry(open_stp->st_lockowners.next, |
644 | struct nfs4_lockowner, lo_perstateid); | |
645 | release_lockowner(lo); | |
529d7b2a BF |
646 | } |
647 | } | |
648 | ||
38c387b5 | 649 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
650 | { |
651 | unhash_generic_stateid(stp); | |
652 | release_stateid_lockowners(stp); | |
38c387b5 BF |
653 | close_generic_stateid(stp); |
654 | } | |
655 | ||
656 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
657 | { | |
658 | unhash_open_stateid(stp); | |
6136d2b4 | 659 | unhash_stid(&stp->st_stid); |
2283963f BF |
660 | free_generic_stateid(stp); |
661 | } | |
662 | ||
fe0750e5 | 663 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 664 | { |
dcef0413 | 665 | struct nfs4_ol_stateid *stp; |
f1d110ca | 666 | |
fe0750e5 BF |
667 | list_del(&oo->oo_owner.so_strhash); |
668 | list_del(&oo->oo_perclient); | |
669 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
670 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 671 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 672 | release_open_stateid(stp); |
f1d110ca BF |
673 | } |
674 | } | |
675 | ||
f7a4d872 BF |
676 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
677 | { | |
678 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
679 | ||
680 | if (s) { | |
6136d2b4 | 681 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
682 | free_generic_stateid(s); |
683 | oo->oo_last_closed_stid = NULL; | |
684 | } | |
685 | } | |
686 | ||
fe0750e5 | 687 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 688 | { |
fe0750e5 BF |
689 | unhash_openowner(oo); |
690 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 691 | release_last_closed_stateid(oo); |
fe0750e5 | 692 | nfs4_free_openowner(oo); |
f1d110ca BF |
693 | } |
694 | ||
5282fd72 ME |
695 | static inline int |
696 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
697 | { | |
698 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
699 | ||
700 | return sid->sequence % SESSION_HASH_SIZE; | |
701 | } | |
702 | ||
8f199b82 | 703 | #ifdef NFSD_DEBUG |
5282fd72 ME |
704 | static inline void |
705 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
706 | { | |
707 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
708 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
709 | } | |
8f199b82 TM |
710 | #else |
711 | static inline void | |
712 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
713 | { | |
714 | } | |
715 | #endif | |
716 | ||
9411b1d4 BF |
717 | /* |
718 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
719 | * won't be used for replay. | |
720 | */ | |
721 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
722 | { | |
723 | struct nfs4_stateowner *so = cstate->replay_owner; | |
724 | ||
725 | if (nfserr == nfserr_replay_me) | |
726 | return; | |
727 | ||
728 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
729 | cstate->replay_owner = NULL; | |
730 | return; | |
731 | } | |
732 | if (!so) | |
733 | return; | |
734 | if (so->so_is_open_owner) | |
735 | release_last_closed_stateid(openowner(so)); | |
736 | so->so_seqid++; | |
737 | return; | |
738 | } | |
5282fd72 | 739 | |
ec6b5d7b AA |
740 | static void |
741 | gen_sessionid(struct nfsd4_session *ses) | |
742 | { | |
743 | struct nfs4_client *clp = ses->se_client; | |
744 | struct nfsd4_sessionid *sid; | |
745 | ||
746 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
747 | sid->clientid = clp->cl_clientid; | |
748 | sid->sequence = current_sessionid++; | |
749 | sid->reserved = 0; | |
750 | } | |
751 | ||
752 | /* | |
a649637c AA |
753 | * The protocol defines ca_maxresponssize_cached to include the size of |
754 | * the rpc header, but all we need to cache is the data starting after | |
755 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
756 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
757 | * value that is the number of bytes in our cache plus a few additional | |
758 | * bytes. In order to stay on the safe side, and not promise more than | |
759 | * we can cache, those additional bytes must be the minimum possible: 24 | |
760 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
761 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
762 | * for the SEQUENCE op response: | |
763 | */ | |
764 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
765 | ||
557ce264 AA |
766 | static void |
767 | free_session_slots(struct nfsd4_session *ses) | |
768 | { | |
769 | int i; | |
770 | ||
771 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
772 | kfree(ses->se_slots[i]); | |
773 | } | |
774 | ||
a649637c | 775 | /* |
efe0cb6d BF |
776 | * We don't actually need to cache the rpc and session headers, so we |
777 | * can allocate a little less for each slot: | |
778 | */ | |
779 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
780 | { | |
781 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
782 | } | |
783 | ||
5b6feee9 | 784 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 785 | { |
5b6feee9 BF |
786 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
787 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 788 | |
5b6feee9 BF |
789 | return size; |
790 | } | |
ec6b5d7b | 791 | |
5b6feee9 BF |
792 | /* |
793 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 794 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 795 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 796 | */ |
5b6feee9 | 797 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 798 | { |
5b6feee9 | 799 | int avail; |
ec6b5d7b | 800 | |
5b6feee9 | 801 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 802 | |
5b6feee9 | 803 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
804 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
805 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
806 | num = min_t(int, num, avail / slotsize); |
807 | nfsd_drc_mem_used += num * slotsize; | |
808 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 809 | |
5b6feee9 BF |
810 | return num; |
811 | } | |
ec6b5d7b | 812 | |
5b6feee9 BF |
813 | static void nfsd4_put_drc_mem(int slotsize, int num) |
814 | { | |
4bd9b0f4 | 815 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 816 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 817 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 818 | } |
ec6b5d7b | 819 | |
a827bcb2 | 820 | static struct nfsd4_session *__alloc_session(int slotsize, int numslots) |
5b6feee9 BF |
821 | { |
822 | struct nfsd4_session *new; | |
823 | int mem, i; | |
a649637c | 824 | |
5b6feee9 BF |
825 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
826 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
827 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 828 | |
5b6feee9 BF |
829 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
830 | if (!new) | |
831 | return NULL; | |
557ce264 | 832 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
833 | for (i = 0; i < numslots; i++) { |
834 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
835 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
836 | if (!new->se_slots[i]) | |
557ce264 | 837 | goto out_free; |
557ce264 | 838 | } |
5b6feee9 BF |
839 | return new; |
840 | out_free: | |
841 | while (i--) | |
842 | kfree(new->se_slots[i]); | |
843 | kfree(new); | |
844 | return NULL; | |
ec6b5d7b AA |
845 | } |
846 | ||
9dd9845f SK |
847 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, |
848 | struct nfsd4_channel_attrs *req, | |
849 | int numslots, int slotsize, | |
850 | struct nfsd_net *nn) | |
ec6b5d7b | 851 | { |
9dd9845f | 852 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
ec6b5d7b | 853 | |
5b6feee9 | 854 | new->maxreqs = numslots; |
d2b21743 MJ |
855 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
856 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
857 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
858 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
859 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
860 | } | |
ec6b5d7b | 861 | |
19cf5c02 BF |
862 | static void free_conn(struct nfsd4_conn *c) |
863 | { | |
864 | svc_xprt_put(c->cn_xprt); | |
865 | kfree(c); | |
866 | } | |
ec6b5d7b | 867 | |
19cf5c02 BF |
868 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
869 | { | |
870 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
871 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 872 | |
19cf5c02 BF |
873 | spin_lock(&clp->cl_lock); |
874 | if (!list_empty(&c->cn_persession)) { | |
875 | list_del(&c->cn_persession); | |
876 | free_conn(c); | |
877 | } | |
eea49806 | 878 | nfsd4_probe_callback(clp); |
2e4b7239 | 879 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 880 | } |
ec6b5d7b | 881 | |
d29c374c | 882 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 883 | { |
c7662518 | 884 | struct nfsd4_conn *conn; |
ec6b5d7b | 885 | |
c7662518 BF |
886 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
887 | if (!conn) | |
db90681d | 888 | return NULL; |
c7662518 BF |
889 | svc_xprt_get(rqstp->rq_xprt); |
890 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 891 | conn->cn_flags = flags; |
db90681d BF |
892 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
893 | return conn; | |
894 | } | |
a649637c | 895 | |
328ead28 BF |
896 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
897 | { | |
898 | conn->cn_session = ses; | |
899 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
900 | } |
901 | ||
db90681d | 902 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 903 | { |
db90681d | 904 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 905 | |
c7662518 | 906 | spin_lock(&clp->cl_lock); |
328ead28 | 907 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 908 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
909 | } |
910 | ||
21b75b01 | 911 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 912 | { |
19cf5c02 | 913 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 914 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
915 | } |
916 | ||
e1ff371f | 917 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 918 | { |
21b75b01 | 919 | int ret; |
ec6b5d7b | 920 | |
db90681d | 921 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
922 | ret = nfsd4_register_conn(conn); |
923 | if (ret) | |
924 | /* oops; xprt is already down: */ | |
925 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 926 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
927 | /* callback channel may be back up */ |
928 | nfsd4_probe_callback(ses->se_client); | |
929 | } | |
c7662518 | 930 | } |
ec6b5d7b | 931 | |
e1ff371f | 932 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
933 | { |
934 | u32 dir = NFS4_CDFC4_FORE; | |
935 | ||
e1ff371f | 936 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 937 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 938 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
939 | } |
940 | ||
941 | /* must be called under client_lock */ | |
19cf5c02 | 942 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 943 | { |
19cf5c02 BF |
944 | struct nfs4_client *clp = s->se_client; |
945 | struct nfsd4_conn *c; | |
ec6b5d7b | 946 | |
19cf5c02 BF |
947 | spin_lock(&clp->cl_lock); |
948 | while (!list_empty(&s->se_conns)) { | |
949 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
950 | list_del_init(&c->cn_persession); | |
951 | spin_unlock(&clp->cl_lock); | |
557ce264 | 952 | |
19cf5c02 BF |
953 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
954 | free_conn(c); | |
ec6b5d7b | 955 | |
19cf5c02 BF |
956 | spin_lock(&clp->cl_lock); |
957 | } | |
958 | spin_unlock(&clp->cl_lock); | |
c7662518 | 959 | } |
ec6b5d7b | 960 | |
1377b69e BF |
961 | static void __free_session(struct nfsd4_session *ses) |
962 | { | |
963 | nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); | |
964 | free_session_slots(ses); | |
965 | kfree(ses); | |
966 | } | |
967 | ||
66b2b9b2 | 968 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 969 | { |
66b2b9b2 | 970 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
971 | |
972 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 973 | nfsd4_del_conns(ses); |
1377b69e | 974 | __free_session(ses); |
c7662518 BF |
975 | } |
976 | ||
9dd9845f SK |
977 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan, |
978 | struct nfsd_net *nn) | |
5b6feee9 BF |
979 | { |
980 | struct nfsd4_session *new; | |
5b6feee9 | 981 | int numslots, slotsize; |
5b6feee9 BF |
982 | /* |
983 | * Note decreasing slot size below client's request may | |
984 | * make it difficult for client to function correctly, whereas | |
985 | * decreasing the number of slots will (just?) affect | |
986 | * performance. When short on memory we therefore prefer to | |
987 | * decrease number of slots instead of their size. | |
988 | */ | |
989 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
990 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
991 | if (numslots < 1) |
992 | return NULL; | |
5b6feee9 | 993 | |
a827bcb2 | 994 | new = __alloc_session(slotsize, numslots); |
5b6feee9 | 995 | if (!new) { |
74b70dde | 996 | nfsd4_put_drc_mem(slotsize, numslots); |
ac7c46f2 | 997 | return NULL; |
557ce264 | 998 | } |
9dd9845f | 999 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize, nn); |
a827bcb2 BF |
1000 | return new; |
1001 | } | |
557ce264 | 1002 | |
135ae827 | 1003 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1004 | { |
a827bcb2 | 1005 | int idx; |
1872de0e | 1006 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1007 | |
ec6b5d7b AA |
1008 | new->se_client = clp; |
1009 | gen_sessionid(new); | |
ec6b5d7b | 1010 | |
c7662518 BF |
1011 | INIT_LIST_HEAD(&new->se_conns); |
1012 | ||
ac7c46f2 | 1013 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1014 | new->se_flags = cses->flags; |
8b5ce5cd | 1015 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1016 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1017 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1018 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1019 | spin_lock(&nn->client_lock); |
1872de0e | 1020 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1021 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1022 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1023 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1024 | spin_unlock(&nn->client_lock); |
ec6b5d7b | 1025 | |
dcbeaa68 | 1026 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1027 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1028 | /* |
1029 | * This is a little silly; with sessions there's no real | |
1030 | * use for the callback address. Use the peer address | |
1031 | * as a reasonable default for now, but consider fixing | |
1032 | * the rpc client not to require an address in the | |
1033 | * future: | |
1034 | */ | |
edd76786 BF |
1035 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1036 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1037 | } |
ec6b5d7b AA |
1038 | } |
1039 | ||
9089f1b4 | 1040 | /* caller must hold client_lock */ |
5282fd72 | 1041 | static struct nfsd4_session * |
1872de0e | 1042 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1043 | { |
1044 | struct nfsd4_session *elem; | |
1045 | int idx; | |
1872de0e | 1046 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1047 | |
1048 | dump_sessionid(__func__, sessionid); | |
1049 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1050 | /* Search in the appropriate list */ |
1872de0e | 1051 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1052 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1053 | NFS4_MAX_SESSIONID_LEN)) { | |
1054 | return elem; | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | dprintk("%s: session not found\n", __func__); | |
1059 | return NULL; | |
1060 | } | |
1061 | ||
9089f1b4 | 1062 | /* caller must hold client_lock */ |
7116ed6b | 1063 | static void |
5282fd72 | 1064 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1065 | { |
1066 | list_del(&ses->se_hash); | |
4c649378 | 1067 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1068 | list_del(&ses->se_perclnt); |
4c649378 | 1069 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1070 | } |
1071 | ||
1da177e4 LT |
1072 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1073 | static int | |
2c142baa | 1074 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1075 | { |
2c142baa | 1076 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1077 | return 0; |
60adfc50 | 1078 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1079 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1080 | return 1; |
1081 | } | |
1082 | ||
1083 | /* | |
1084 | * XXX Should we use a slab cache ? | |
1085 | * This type of memory management is somewhat inefficient, but we use it | |
1086 | * anyway since SETCLIENTID is not a common operation. | |
1087 | */ | |
35bba9a3 | 1088 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1089 | { |
1090 | struct nfs4_client *clp; | |
1091 | ||
35bba9a3 BF |
1092 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1093 | if (clp == NULL) | |
1094 | return NULL; | |
67114fe6 | 1095 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1096 | if (clp->cl_name.data == NULL) { |
1097 | kfree(clp); | |
1098 | return NULL; | |
1da177e4 | 1099 | } |
35bba9a3 | 1100 | clp->cl_name.len = name.len; |
1da177e4 LT |
1101 | return clp; |
1102 | } | |
1103 | ||
1104 | static inline void | |
1105 | free_client(struct nfs4_client *clp) | |
1106 | { | |
bca0ec65 | 1107 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1108 | |
1109 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1110 | while (!list_empty(&clp->cl_sessions)) { |
1111 | struct nfsd4_session *ses; | |
1112 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1113 | se_perclnt); | |
1114 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1115 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1116 | free_session(ses); | |
792c95dd | 1117 | } |
03a4e1f6 | 1118 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1119 | kfree(clp->cl_name.data); |
2d32b29a | 1120 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1121 | kfree(clp); |
1122 | } | |
1123 | ||
84d38ac9 BH |
1124 | /* must be called under the client_lock */ |
1125 | static inline void | |
1126 | unhash_client_locked(struct nfs4_client *clp) | |
1127 | { | |
792c95dd BF |
1128 | struct nfsd4_session *ses; |
1129 | ||
84d38ac9 | 1130 | list_del(&clp->cl_lru); |
4c649378 | 1131 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1132 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1133 | list_del_init(&ses->se_hash); | |
4c649378 | 1134 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1135 | } |
1136 | ||
1da177e4 | 1137 | static void |
0d22f68f | 1138 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1139 | { |
fe0750e5 | 1140 | struct nfs4_openowner *oo; |
1da177e4 | 1141 | struct nfs4_delegation *dp; |
1da177e4 | 1142 | struct list_head reaplist; |
382a62e7 | 1143 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1144 | |
1da177e4 LT |
1145 | INIT_LIST_HEAD(&reaplist); |
1146 | spin_lock(&recall_lock); | |
ea1da636 N |
1147 | while (!list_empty(&clp->cl_delegations)) { |
1148 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1149 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1150 | list_move(&dp->dl_recall_lru, &reaplist); |
1151 | } | |
1152 | spin_unlock(&recall_lock); | |
1153 | while (!list_empty(&reaplist)) { | |
1154 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1155 | unhash_delegation(dp); |
1156 | } | |
ea1da636 | 1157 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1158 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1159 | release_openowner(oo); | |
1da177e4 | 1160 | } |
6ff8da08 | 1161 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1162 | if (clp->cl_cb_conn.cb_xprt) |
1163 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1164 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1165 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1166 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1167 | else |
a99454aa | 1168 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1169 | spin_lock(&nn->client_lock); |
84d38ac9 | 1170 | unhash_client_locked(clp); |
221a6876 BF |
1171 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1172 | free_client(clp); | |
c9a49628 | 1173 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1174 | } |
1175 | ||
0d22f68f BF |
1176 | static void expire_client(struct nfs4_client *clp) |
1177 | { | |
1178 | nfsd4_client_record_remove(clp); | |
1179 | destroy_client(clp); | |
1180 | } | |
1181 | ||
35bba9a3 BF |
1182 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1183 | { | |
1184 | memcpy(target->cl_verifier.data, source->data, | |
1185 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1186 | } |
1187 | ||
35bba9a3 BF |
1188 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1189 | { | |
1da177e4 LT |
1190 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1191 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1192 | } | |
1193 | ||
03a4e1f6 | 1194 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1195 | { |
03a4e1f6 BF |
1196 | if (source->cr_principal) { |
1197 | target->cr_principal = | |
1198 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1199 | if (target->cr_principal == NULL) | |
1200 | return -ENOMEM; | |
1201 | } else | |
1202 | target->cr_principal = NULL; | |
d5497fc6 | 1203 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1204 | target->cr_uid = source->cr_uid; |
1205 | target->cr_gid = source->cr_gid; | |
1206 | target->cr_group_info = source->cr_group_info; | |
1207 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1208 | return 0; |
1da177e4 LT |
1209 | } |
1210 | ||
ac55fdc4 JL |
1211 | static long long |
1212 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1213 | { | |
1214 | long long res; | |
1215 | ||
1216 | res = o1->len - o2->len; | |
1217 | if (res) | |
1218 | return res; | |
1219 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1220 | } | |
1221 | ||
35bba9a3 | 1222 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1223 | { |
a55370a3 | 1224 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1225 | } |
1226 | ||
1227 | static int | |
599e0a22 BF |
1228 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1229 | { | |
1230 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | static int | |
599e0a22 BF |
1234 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1235 | { | |
1236 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1237 | } |
1238 | ||
8fbba96e BF |
1239 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1240 | { | |
1241 | int i; | |
1242 | ||
1243 | if (g1->ngroups != g2->ngroups) | |
1244 | return false; | |
1245 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1246 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1247 | return false; |
1248 | return true; | |
1249 | } | |
1250 | ||
68eb3508 BF |
1251 | /* |
1252 | * RFC 3530 language requires clid_inuse be returned when the | |
1253 | * "principal" associated with a requests differs from that previously | |
1254 | * used. We use uid, gid's, and gss principal string as our best | |
1255 | * approximation. We also don't want to allow non-gss use of a client | |
1256 | * established using gss: in theory cr_principal should catch that | |
1257 | * change, but in practice cr_principal can be null even in the gss case | |
1258 | * since gssd doesn't always pass down a principal string. | |
1259 | */ | |
1260 | static bool is_gss_cred(struct svc_cred *cr) | |
1261 | { | |
1262 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1263 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1264 | } | |
1265 | ||
1266 | ||
5559b50a | 1267 | static bool |
599e0a22 BF |
1268 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1269 | { | |
68eb3508 | 1270 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1271 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1272 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1273 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1274 | return false; | |
1275 | if (cr1->cr_principal == cr2->cr_principal) | |
1276 | return true; | |
1277 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1278 | return false; | |
5559b50a | 1279 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1280 | } |
1281 | ||
c212cecf | 1282 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1283 | { |
1284 | static u32 current_clientid = 1; | |
1285 | ||
2c142baa | 1286 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1287 | clp->cl_clientid.cl_id = current_clientid++; |
1288 | } | |
1289 | ||
deda2faa BF |
1290 | static void gen_confirm(struct nfs4_client *clp) |
1291 | { | |
ab4684d1 | 1292 | __be32 verf[2]; |
deda2faa | 1293 | static u32 i; |
1da177e4 | 1294 | |
ab4684d1 CL |
1295 | verf[0] = (__be32)get_seconds(); |
1296 | verf[1] = (__be32)i++; | |
1297 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1298 | } |
1299 | ||
38c2f4b1 | 1300 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1301 | { |
3abdb607 BF |
1302 | struct nfs4_stid *ret; |
1303 | ||
1304 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1305 | if (!ret || !ret->sc_type) | |
1306 | return NULL; | |
1307 | return ret; | |
4d71ab87 BF |
1308 | } |
1309 | ||
38c2f4b1 | 1310 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1311 | { |
1312 | struct nfs4_stid *s; | |
4d71ab87 | 1313 | |
38c2f4b1 | 1314 | s = find_stateid(cl, t); |
4d71ab87 BF |
1315 | if (!s) |
1316 | return NULL; | |
f459e453 | 1317 | if (typemask & s->sc_type) |
4581d140 | 1318 | return s; |
4581d140 BF |
1319 | return NULL; |
1320 | } | |
1321 | ||
2216d449 | 1322 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1323 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1324 | { | |
1325 | struct nfs4_client *clp; | |
1326 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1327 | int ret; |
c212cecf | 1328 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1329 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1330 | |
1331 | clp = alloc_client(name); | |
1332 | if (clp == NULL) | |
1333 | return NULL; | |
1334 | ||
792c95dd | 1335 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1336 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1337 | if (ret) { | |
c9a49628 | 1338 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1339 | free_client(clp); |
c9a49628 | 1340 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1341 | return NULL; |
b09333c4 | 1342 | } |
38c2f4b1 | 1343 | idr_init(&clp->cl_stateids); |
46583e25 | 1344 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1345 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1346 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1347 | INIT_LIST_HEAD(&clp->cl_openowners); |
1348 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1349 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1350 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1351 | spin_lock_init(&clp->cl_lock); |
57725155 | 1352 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1353 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1354 | clear_bit(0, &clp->cl_cb_slot_busy); |
1355 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1356 | copy_verf(clp, verf); | |
1357 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1358 | gen_confirm(clp); |
edd76786 | 1359 | clp->cl_cb_session = NULL; |
c212cecf | 1360 | clp->net = net; |
b09333c4 RL |
1361 | return clp; |
1362 | } | |
1363 | ||
fd39ca9a | 1364 | static void |
ac55fdc4 JL |
1365 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1366 | { | |
1367 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1368 | struct nfs4_client *clp; | |
1369 | ||
1370 | while (*new) { | |
1371 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1372 | parent = *new; | |
1373 | ||
1374 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1375 | new = &((*new)->rb_left); | |
1376 | else | |
1377 | new = &((*new)->rb_right); | |
1378 | } | |
1379 | ||
1380 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1381 | rb_insert_color(&new_clp->cl_namenode, root); | |
1382 | } | |
1383 | ||
1384 | static struct nfs4_client * | |
1385 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1386 | { | |
1387 | long long cmp; | |
1388 | struct rb_node *node = root->rb_node; | |
1389 | struct nfs4_client *clp; | |
1390 | ||
1391 | while (node) { | |
1392 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1393 | cmp = compare_blob(&clp->cl_name, name); | |
1394 | if (cmp > 0) | |
1395 | node = node->rb_left; | |
1396 | else if (cmp < 0) | |
1397 | node = node->rb_right; | |
1398 | else | |
1399 | return clp; | |
1400 | } | |
1401 | return NULL; | |
1402 | } | |
1403 | ||
1404 | static void | |
1405 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1406 | { |
1407 | unsigned int idhashval; | |
0a7ec377 | 1408 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1409 | |
ac55fdc4 | 1410 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1411 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1412 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1413 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1414 | renew_client(clp); |
1da177e4 LT |
1415 | } |
1416 | ||
fd39ca9a | 1417 | static void |
1da177e4 LT |
1418 | move_to_confirmed(struct nfs4_client *clp) |
1419 | { | |
1420 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1421 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1422 | |
1423 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1424 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1425 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1426 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1427 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1428 | renew_client(clp); |
1429 | } | |
1430 | ||
1431 | static struct nfs4_client * | |
bfa85e83 | 1432 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1433 | { |
1434 | struct nfs4_client *clp; | |
1435 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1436 | ||
bfa85e83 | 1437 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1438 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1439 | if ((bool)clp->cl_minorversion != sessions) |
1440 | return NULL; | |
a50d2ad1 | 1441 | renew_client(clp); |
1da177e4 | 1442 | return clp; |
a50d2ad1 | 1443 | } |
1da177e4 LT |
1444 | } |
1445 | return NULL; | |
1446 | } | |
1447 | ||
bfa85e83 BF |
1448 | static struct nfs4_client * |
1449 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1450 | { | |
1451 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1452 | ||
1453 | return find_client_in_id_table(tbl, clid, sessions); | |
1454 | } | |
1455 | ||
1da177e4 | 1456 | static struct nfs4_client * |
0a7ec377 | 1457 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1458 | { |
bfa85e83 | 1459 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1460 | |
bfa85e83 | 1461 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1462 | } |
1463 | ||
6e5f15c9 | 1464 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1465 | { |
6e5f15c9 | 1466 | return clp->cl_exchange_flags != 0; |
e203d506 | 1467 | } |
a1bcecd2 | 1468 | |
28ce6054 | 1469 | static struct nfs4_client * |
382a62e7 | 1470 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1471 | { |
382a62e7 | 1472 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1473 | } |
1474 | ||
1475 | static struct nfs4_client * | |
a99454aa | 1476 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1477 | { |
a99454aa | 1478 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1479 | } |
1480 | ||
fd39ca9a | 1481 | static void |
6f3d772f | 1482 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1483 | { |
07263f1e | 1484 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1485 | struct sockaddr *sa = svc_addr(rqstp); |
1486 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1487 | unsigned short expected_family; |
1488 | ||
1489 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1490 | if (se->se_callback_netid_len == 3 && | |
1491 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1492 | expected_family = AF_INET; | |
1493 | else if (se->se_callback_netid_len == 4 && | |
1494 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1495 | expected_family = AF_INET6; | |
1496 | else | |
1da177e4 LT |
1497 | goto out_err; |
1498 | ||
c212cecf | 1499 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1500 | se->se_callback_addr_len, |
07263f1e BF |
1501 | (struct sockaddr *)&conn->cb_addr, |
1502 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1503 | |
07263f1e | 1504 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1505 | goto out_err; |
aa9a4ec7 | 1506 | |
07263f1e BF |
1507 | if (conn->cb_addr.ss_family == AF_INET6) |
1508 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1509 | |
07263f1e BF |
1510 | conn->cb_prog = se->se_callback_prog; |
1511 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1512 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1513 | return; |
1514 | out_err: | |
07263f1e BF |
1515 | conn->cb_addr.ss_family = AF_UNSPEC; |
1516 | conn->cb_addrlen = 0; | |
849823c5 | 1517 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1518 | "will not receive delegations\n", |
1519 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1520 | ||
1da177e4 LT |
1521 | return; |
1522 | } | |
1523 | ||
074fe897 | 1524 | /* |
557ce264 | 1525 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1526 | */ |
074fe897 AA |
1527 | void |
1528 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1529 | { |
557ce264 AA |
1530 | struct nfsd4_slot *slot = resp->cstate.slot; |
1531 | unsigned int base; | |
074fe897 | 1532 | |
557ce264 | 1533 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1534 | |
557ce264 AA |
1535 | slot->sl_opcnt = resp->opcnt; |
1536 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1537 | |
bf5c43c8 | 1538 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1539 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1540 | slot->sl_datalen = 0; |
bf864a31 | 1541 | return; |
074fe897 | 1542 | } |
557ce264 AA |
1543 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1544 | base = (char *)resp->cstate.datap - | |
1545 | (char *)resp->xbuf->head[0].iov_base; | |
1546 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1547 | slot->sl_datalen)) | |
1548 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1549 | return; | |
074fe897 AA |
1550 | } |
1551 | ||
1552 | /* | |
abfabf8c AA |
1553 | * Encode the replay sequence operation from the slot values. |
1554 | * If cachethis is FALSE encode the uncached rep error on the next | |
1555 | * operation which sets resp->p and increments resp->opcnt for | |
1556 | * nfs4svc_encode_compoundres. | |
074fe897 | 1557 | * |
074fe897 | 1558 | */ |
abfabf8c AA |
1559 | static __be32 |
1560 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1561 | struct nfsd4_compoundres *resp) | |
074fe897 | 1562 | { |
abfabf8c AA |
1563 | struct nfsd4_op *op; |
1564 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1565 | |
abfabf8c AA |
1566 | /* Encode the replayed sequence operation */ |
1567 | op = &args->ops[resp->opcnt - 1]; | |
1568 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1569 | |
abfabf8c | 1570 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1571 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1572 | op = &args->ops[resp->opcnt++]; |
1573 | op->status = nfserr_retry_uncached_rep; | |
1574 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1575 | } |
abfabf8c | 1576 | return op->status; |
074fe897 AA |
1577 | } |
1578 | ||
1579 | /* | |
557ce264 AA |
1580 | * The sequence operation is not cached because we can use the slot and |
1581 | * session values. | |
074fe897 AA |
1582 | */ |
1583 | __be32 | |
bf864a31 AA |
1584 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1585 | struct nfsd4_sequence *seq) | |
074fe897 | 1586 | { |
557ce264 | 1587 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1588 | __be32 status; |
1589 | ||
557ce264 | 1590 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1591 | |
abfabf8c AA |
1592 | /* Either returns 0 or nfserr_retry_uncached */ |
1593 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1594 | if (status == nfserr_retry_uncached_rep) | |
1595 | return status; | |
074fe897 | 1596 | |
557ce264 AA |
1597 | /* The sequence operation has been encoded, cstate->datap set. */ |
1598 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1599 | |
557ce264 AA |
1600 | resp->opcnt = slot->sl_opcnt; |
1601 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1602 | status = slot->sl_status; | |
074fe897 AA |
1603 | |
1604 | return status; | |
1605 | } | |
1606 | ||
0733d213 AA |
1607 | /* |
1608 | * Set the exchange_id flags returned by the server. | |
1609 | */ | |
1610 | static void | |
1611 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1612 | { | |
1613 | /* pNFS is not supported */ | |
1614 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1615 | ||
1616 | /* Referrals are supported, Migration is not. */ | |
1617 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1618 | ||
1619 | /* set the wire flags to return to client. */ | |
1620 | clid->flags = new->cl_exchange_flags; | |
1621 | } | |
1622 | ||
631fc9ea BF |
1623 | static bool client_has_state(struct nfs4_client *clp) |
1624 | { | |
1625 | /* | |
1626 | * Note clp->cl_openowners check isn't quite right: there's no | |
1627 | * need to count owners without stateid's. | |
1628 | * | |
1629 | * Also note we should probably be using this in 4.0 case too. | |
1630 | */ | |
6eccece9 BF |
1631 | return !list_empty(&clp->cl_openowners) |
1632 | || !list_empty(&clp->cl_delegations) | |
1633 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1634 | } |
1635 | ||
069b6ad4 AA |
1636 | __be32 |
1637 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1638 | struct nfsd4_compound_state *cstate, | |
1639 | struct nfsd4_exchange_id *exid) | |
1640 | { | |
0733d213 | 1641 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1642 | __be32 status; |
363168b4 | 1643 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1644 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1645 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1646 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1647 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1648 | |
363168b4 | 1649 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1650 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1651 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1652 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1653 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1654 | |
a084daf5 | 1655 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1656 | return nfserr_inval; |
1657 | ||
1658 | /* Currently only support SP4_NONE */ | |
1659 | switch (exid->spa_how) { | |
1660 | case SP4_NONE: | |
1661 | break; | |
063b0fb9 BF |
1662 | default: /* checked by xdr code */ |
1663 | WARN_ON_ONCE(1); | |
0733d213 | 1664 | case SP4_SSV: |
0733d213 AA |
1665 | case SP4_MACH_CRED: |
1666 | return nfserr_serverfault; /* no excuse :-/ */ | |
1667 | } | |
1668 | ||
2dbb269d | 1669 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1670 | nfs4_lock_state(); |
382a62e7 | 1671 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1672 | if (conf) { |
83e08fd4 BF |
1673 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1674 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1675 | ||
136e658d BF |
1676 | if (update) { |
1677 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1678 | status = nfserr_inval; |
1a308118 BF |
1679 | goto out; |
1680 | } | |
136e658d | 1681 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1682 | status = nfserr_perm; |
136e658d BF |
1683 | goto out; |
1684 | } | |
1685 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1686 | status = nfserr_not_same; |
1687 | goto out; | |
1688 | } | |
136e658d BF |
1689 | /* case 6 */ |
1690 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1691 | new = conf; | |
1692 | goto out_copy; | |
0733d213 | 1693 | } |
136e658d | 1694 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1695 | if (client_has_state(conf)) { |
1696 | status = nfserr_clid_inuse; | |
0733d213 AA |
1697 | goto out; |
1698 | } | |
1699 | expire_client(conf); | |
1700 | goto out_new; | |
1701 | } | |
136e658d | 1702 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1703 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1704 | new = conf; |
1705 | goto out_copy; | |
1706 | } | |
1707 | /* case 5, client reboot */ | |
136e658d | 1708 | goto out_new; |
6ddbbbfe MS |
1709 | } |
1710 | ||
2dbb269d | 1711 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1712 | status = nfserr_noent; |
1713 | goto out; | |
0733d213 AA |
1714 | } |
1715 | ||
a99454aa | 1716 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1717 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1718 | expire_client(unconf); |
0733d213 | 1719 | |
2dbb269d | 1720 | /* case 1 (normal case) */ |
0733d213 | 1721 | out_new: |
2216d449 | 1722 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1723 | if (new == NULL) { |
4731030d | 1724 | status = nfserr_jukebox; |
0733d213 AA |
1725 | goto out; |
1726 | } | |
c116a0af | 1727 | new->cl_minorversion = 1; |
0733d213 | 1728 | |
c212cecf | 1729 | gen_clid(new, nn); |
ac55fdc4 | 1730 | add_to_unconfirmed(new); |
0733d213 AA |
1731 | out_copy: |
1732 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1733 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1734 | ||
778df3f0 | 1735 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1736 | nfsd4_set_ex_flags(new, exid); |
1737 | ||
1738 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1739 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1740 | status = nfs_ok; |
1741 | ||
1742 | out: | |
1743 | nfs4_unlock_state(); | |
0733d213 | 1744 | return status; |
069b6ad4 AA |
1745 | } |
1746 | ||
57b7b43b | 1747 | static __be32 |
88e588d5 | 1748 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1749 | { |
88e588d5 AA |
1750 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1751 | slot_seqid); | |
b85d4c01 BH |
1752 | |
1753 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1754 | if (slot_inuse) { |
1755 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1756 | return nfserr_jukebox; |
1757 | else | |
1758 | return nfserr_seq_misordered; | |
1759 | } | |
f6d82485 | 1760 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1761 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1762 | return nfs_ok; |
88e588d5 | 1763 | if (seqid == slot_seqid) |
b85d4c01 | 1764 | return nfserr_replay_cache; |
b85d4c01 BH |
1765 | return nfserr_seq_misordered; |
1766 | } | |
1767 | ||
49557cc7 AA |
1768 | /* |
1769 | * Cache the create session result into the create session single DRC | |
1770 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1771 | * Do this for solo or embedded create session operations. | |
1772 | */ | |
1773 | static void | |
1774 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1775 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1776 | { |
1777 | slot->sl_status = nfserr; | |
1778 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1779 | } | |
1780 | ||
1781 | static __be32 | |
1782 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1783 | struct nfsd4_clid_slot *slot) | |
1784 | { | |
1785 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1786 | return slot->sl_status; | |
1787 | } | |
1788 | ||
1b74c25b MJ |
1789 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1790 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1791 | 1 + /* MIN tag is length with zero, only length */ \ | |
1792 | 3 + /* version, opcount, opcode */ \ | |
1793 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1794 | /* seqid, slotID, slotID, cache */ \ | |
1795 | 4 ) * sizeof(__be32)) | |
1796 | ||
1797 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1798 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1799 | 1 + /* status */ \ | |
1800 | 1 + /* MIN tag is length with zero, only length */ \ | |
1801 | 3 + /* opcount, opcode, opstatus*/ \ | |
1802 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1803 | /* seqid, slotID, slotID, slotID, status */ \ | |
1804 | 5 ) * sizeof(__be32)) | |
1805 | ||
373cd409 | 1806 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 1807 | { |
373cd409 BF |
1808 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
1809 | return nfserr_toosmall; | |
1810 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
1811 | return nfserr_toosmall; | |
1812 | return nfs_ok; | |
1b74c25b MJ |
1813 | } |
1814 | ||
069b6ad4 AA |
1815 | __be32 |
1816 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1817 | struct nfsd4_compound_state *cstate, | |
1818 | struct nfsd4_create_session *cr_ses) | |
1819 | { | |
363168b4 | 1820 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1821 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1822 | struct nfsd4_session *new; |
81f0b2a4 | 1823 | struct nfsd4_conn *conn; |
49557cc7 | 1824 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1825 | __be32 status = 0; |
8daae4dc | 1826 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 1827 | |
a62573dc MJ |
1828 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1829 | return nfserr_inval; | |
373cd409 BF |
1830 | status = check_forechannel_attrs(&cr_ses->fore_channel); |
1831 | if (status) | |
1832 | return status; | |
9dd9845f | 1833 | new = alloc_session(&cr_ses->fore_channel, nn); |
81f0b2a4 BF |
1834 | if (!new) |
1835 | return nfserr_jukebox; | |
1836 | status = nfserr_jukebox; | |
1837 | conn = alloc_conn_from_crses(rqstp, cr_ses); | |
1838 | if (!conn) | |
1839 | goto out_free_session; | |
a62573dc | 1840 | |
ec6b5d7b | 1841 | nfs4_lock_state(); |
0a7ec377 | 1842 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 1843 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 1844 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
1845 | |
1846 | if (conf) { | |
49557cc7 AA |
1847 | cs_slot = &conf->cl_cs_slot; |
1848 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1849 | if (status == nfserr_replay_cache) { |
49557cc7 | 1850 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1851 | goto out_free_conn; |
49557cc7 | 1852 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1853 | status = nfserr_seq_misordered; |
81f0b2a4 | 1854 | goto out_free_conn; |
ec6b5d7b | 1855 | } |
ec6b5d7b | 1856 | } else if (unconf) { |
8f9d3d3b | 1857 | struct nfs4_client *old; |
ec6b5d7b | 1858 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1859 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1860 | status = nfserr_clid_inuse; |
81f0b2a4 | 1861 | goto out_free_conn; |
ec6b5d7b | 1862 | } |
49557cc7 AA |
1863 | cs_slot = &unconf->cl_cs_slot; |
1864 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1865 | if (status) { |
1866 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1867 | status = nfserr_seq_misordered; |
81f0b2a4 | 1868 | goto out_free_conn; |
ec6b5d7b | 1869 | } |
382a62e7 | 1870 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
1871 | if (old) { |
1872 | status = mark_client_expired(old); | |
1873 | if (status) | |
1874 | goto out_free_conn; | |
8f9d3d3b | 1875 | expire_client(old); |
221a6876 | 1876 | } |
8f9d3d3b | 1877 | move_to_confirmed(unconf); |
ec6b5d7b AA |
1878 | conf = unconf; |
1879 | } else { | |
1880 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1881 | goto out_free_conn; |
ec6b5d7b | 1882 | } |
81f0b2a4 | 1883 | status = nfs_ok; |
408b79bc BF |
1884 | /* |
1885 | * We do not support RDMA or persistent sessions | |
1886 | */ | |
1887 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1888 | cr_ses->flags &= ~SESSION4_RDMA; | |
1889 | ||
81f0b2a4 BF |
1890 | init_session(rqstp, new, conf, cr_ses); |
1891 | nfsd4_init_conn(rqstp, conn, new); | |
1892 | ||
ac7c46f2 | 1893 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1894 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1895 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1896 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1897 | cs_slot->sl_seqid++; |
49557cc7 | 1898 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1899 | |
49557cc7 AA |
1900 | /* cache solo and embedded create sessions under the state lock */ |
1901 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 1902 | nfs4_unlock_state(); |
ec6b5d7b | 1903 | return status; |
81f0b2a4 | 1904 | out_free_conn: |
266533c6 | 1905 | nfs4_unlock_state(); |
81f0b2a4 BF |
1906 | free_conn(conn); |
1907 | out_free_session: | |
1908 | __free_session(new); | |
1ca50792 | 1909 | return status; |
069b6ad4 AA |
1910 | } |
1911 | ||
1d1bc8f2 BF |
1912 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1913 | { | |
1914 | switch (*dir) { | |
1915 | case NFS4_CDFC4_FORE: | |
1916 | case NFS4_CDFC4_BACK: | |
1917 | return nfs_ok; | |
1918 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1919 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1920 | *dir = NFS4_CDFC4_BOTH; | |
1921 | return nfs_ok; | |
1922 | }; | |
1923 | return nfserr_inval; | |
1924 | } | |
1925 | ||
cb73a9f4 BF |
1926 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
1927 | { | |
1928 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 1929 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
cb73a9f4 | 1930 | |
c9a49628 | 1931 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
1932 | session->se_cb_prog = bc->bc_cb_program; |
1933 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 1934 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
1935 | |
1936 | nfsd4_probe_callback(session->se_client); | |
1937 | ||
1938 | return nfs_ok; | |
1939 | } | |
1940 | ||
1d1bc8f2 BF |
1941 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
1942 | struct nfsd4_compound_state *cstate, | |
1943 | struct nfsd4_bind_conn_to_session *bcts) | |
1944 | { | |
1945 | __be32 status; | |
3ba63671 | 1946 | struct nfsd4_conn *conn; |
4f6e6c17 | 1947 | struct nfsd4_session *session; |
c9a49628 | 1948 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1d1bc8f2 BF |
1949 | |
1950 | if (!nfsd4_last_compound_op(rqstp)) | |
1951 | return nfserr_not_only_op; | |
4f6e6c17 | 1952 | nfs4_lock_state(); |
c9a49628 | 1953 | spin_lock(&nn->client_lock); |
4f6e6c17 | 1954 | session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
c9a49628 | 1955 | spin_unlock(&nn->client_lock); |
4f6e6c17 BF |
1956 | status = nfserr_badsession; |
1957 | if (!session) | |
1958 | goto out; | |
1d1bc8f2 | 1959 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 1960 | if (status) |
4f6e6c17 | 1961 | goto out; |
3ba63671 | 1962 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 1963 | status = nfserr_jukebox; |
3ba63671 | 1964 | if (!conn) |
4f6e6c17 BF |
1965 | goto out; |
1966 | nfsd4_init_conn(rqstp, conn, session); | |
1967 | status = nfs_ok; | |
1968 | out: | |
1969 | nfs4_unlock_state(); | |
1970 | return status; | |
1d1bc8f2 BF |
1971 | } |
1972 | ||
5d4cec2f BF |
1973 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1974 | { | |
1975 | if (!session) | |
1976 | return 0; | |
1977 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1978 | } | |
1979 | ||
069b6ad4 AA |
1980 | __be32 |
1981 | nfsd4_destroy_session(struct svc_rqst *r, | |
1982 | struct nfsd4_compound_state *cstate, | |
1983 | struct nfsd4_destroy_session *sessionid) | |
1984 | { | |
e10e0cfc | 1985 | struct nfsd4_session *ses; |
abcdff09 | 1986 | __be32 status; |
c9a49628 | 1987 | struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); |
e10e0cfc | 1988 | |
abcdff09 BF |
1989 | nfs4_lock_state(); |
1990 | status = nfserr_not_only_op; | |
5d4cec2f | 1991 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 1992 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 1993 | goto out; |
57716355 | 1994 | } |
e10e0cfc | 1995 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 1996 | spin_lock(&nn->client_lock); |
1872de0e | 1997 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
abcdff09 BF |
1998 | status = nfserr_badsession; |
1999 | if (!ses) | |
2000 | goto out_client_lock; | |
66b2b9b2 BF |
2001 | status = mark_session_dead_locked(ses); |
2002 | if (status) | |
2003 | goto out_client_lock; | |
e10e0cfc | 2004 | unhash_session(ses); |
c9a49628 | 2005 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2006 | |
84f5f7cc | 2007 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2008 | |
c9a49628 | 2009 | spin_lock(&nn->client_lock); |
66b2b9b2 | 2010 | free_session(ses); |
e10e0cfc | 2011 | status = nfs_ok; |
abcdff09 BF |
2012 | out_client_lock: |
2013 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2014 | out: |
abcdff09 | 2015 | nfs4_unlock_state(); |
e10e0cfc | 2016 | return status; |
069b6ad4 AA |
2017 | } |
2018 | ||
a663bdd8 | 2019 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2020 | { |
2021 | struct nfsd4_conn *c; | |
2022 | ||
2023 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2024 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2025 | return c; |
2026 | } | |
2027 | } | |
2028 | return NULL; | |
2029 | } | |
2030 | ||
a663bdd8 | 2031 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2032 | { |
2033 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2034 | struct nfsd4_conn *c; |
21b75b01 | 2035 | int ret; |
328ead28 BF |
2036 | |
2037 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2038 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
2039 | if (c) { |
2040 | spin_unlock(&clp->cl_lock); | |
2041 | free_conn(new); | |
2042 | return; | |
2043 | } | |
2044 | __nfsd4_hash_conn(new, ses); | |
2045 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2046 | ret = nfsd4_register_conn(new); |
2047 | if (ret) | |
2048 | /* oops; xprt is already down: */ | |
2049 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
2050 | return; |
2051 | } | |
2052 | ||
868b89c3 MJ |
2053 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2054 | { | |
2055 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2056 | ||
2057 | return args->opcnt > session->se_fchannel.maxops; | |
2058 | } | |
2059 | ||
ae82a8d0 MJ |
2060 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2061 | struct nfsd4_session *session) | |
2062 | { | |
2063 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2064 | ||
2065 | return xb->len > session->se_fchannel.maxreq_sz; | |
2066 | } | |
2067 | ||
069b6ad4 | 2068 | __be32 |
b85d4c01 | 2069 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2070 | struct nfsd4_compound_state *cstate, |
2071 | struct nfsd4_sequence *seq) | |
2072 | { | |
f9bb94c4 | 2073 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 | 2074 | struct nfsd4_session *session; |
221a6876 | 2075 | struct nfs4_client *clp; |
b85d4c01 | 2076 | struct nfsd4_slot *slot; |
a663bdd8 | 2077 | struct nfsd4_conn *conn; |
57b7b43b | 2078 | __be32 status; |
c9a49628 | 2079 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b85d4c01 | 2080 | |
f9bb94c4 AA |
2081 | if (resp->opcnt != 1) |
2082 | return nfserr_sequence_pos; | |
2083 | ||
a663bdd8 BF |
2084 | /* |
2085 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2086 | * below. | |
2087 | */ | |
2088 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2089 | if (!conn) | |
2090 | return nfserr_jukebox; | |
2091 | ||
c9a49628 | 2092 | spin_lock(&nn->client_lock); |
b85d4c01 | 2093 | status = nfserr_badsession; |
1872de0e | 2094 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
b85d4c01 | 2095 | if (!session) |
221a6876 BF |
2096 | goto out_no_session; |
2097 | clp = session->se_client; | |
2098 | status = get_client_locked(clp); | |
2099 | if (status) | |
2100 | goto out_no_session; | |
66b2b9b2 BF |
2101 | status = nfsd4_get_session_locked(session); |
2102 | if (status) | |
2103 | goto out_put_client; | |
b85d4c01 | 2104 | |
868b89c3 MJ |
2105 | status = nfserr_too_many_ops; |
2106 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2107 | goto out_put_session; |
868b89c3 | 2108 | |
ae82a8d0 MJ |
2109 | status = nfserr_req_too_big; |
2110 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2111 | goto out_put_session; |
ae82a8d0 | 2112 | |
b85d4c01 | 2113 | status = nfserr_badslot; |
6c18ba9f | 2114 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2115 | goto out_put_session; |
b85d4c01 | 2116 | |
557ce264 | 2117 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2118 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2119 | ||
a8dfdaeb AA |
2120 | /* We do not negotiate the number of slots yet, so set the |
2121 | * maxslots to the session maxreqs which is used to encode | |
2122 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2123 | seq->maxslots = session->se_fchannel.maxreqs; | |
2124 | ||
73e79482 BF |
2125 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2126 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2127 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2128 | status = nfserr_seq_misordered; |
2129 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2130 | goto out_put_session; |
b85d4c01 BH |
2131 | cstate->slot = slot; |
2132 | cstate->session = session; | |
da3846a2 | 2133 | /* Return the cached reply status and set cstate->status |
557ce264 | 2134 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2135 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2136 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2137 | goto out; |
b85d4c01 BH |
2138 | } |
2139 | if (status) | |
66b2b9b2 | 2140 | goto out_put_session; |
b85d4c01 | 2141 | |
a663bdd8 BF |
2142 | nfsd4_sequence_check_conn(conn, session); |
2143 | conn = NULL; | |
328ead28 | 2144 | |
b85d4c01 | 2145 | /* Success! bump slot seqid */ |
b85d4c01 | 2146 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2147 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2148 | if (seq->cachethis) |
2149 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2150 | else |
2151 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2152 | |
2153 | cstate->slot = slot; | |
2154 | cstate->session = session; | |
2155 | ||
b85d4c01 | 2156 | out: |
221a6876 BF |
2157 | switch (clp->cl_cb_state) { |
2158 | case NFSD4_CB_DOWN: | |
2159 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2160 | break; | |
2161 | case NFSD4_CB_FAULT: | |
2162 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2163 | break; | |
2164 | default: | |
2165 | seq->status_flags = 0; | |
aaf84eb9 | 2166 | } |
221a6876 | 2167 | out_no_session: |
a663bdd8 | 2168 | kfree(conn); |
c9a49628 | 2169 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2170 | return status; |
66b2b9b2 BF |
2171 | out_put_session: |
2172 | nfsd4_put_session(session); | |
221a6876 BF |
2173 | out_put_client: |
2174 | put_client_renew_locked(clp); | |
2175 | goto out_no_session; | |
069b6ad4 AA |
2176 | } |
2177 | ||
345c2842 MJ |
2178 | __be32 |
2179 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2180 | { | |
2181 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2182 | __be32 status = 0; |
8daae4dc | 2183 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2184 | |
2185 | nfs4_lock_state(); | |
0a7ec377 | 2186 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2187 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2188 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2189 | |
2190 | if (conf) { | |
2191 | clp = conf; | |
2192 | ||
c0293b01 | 2193 | if (client_has_state(conf)) { |
345c2842 MJ |
2194 | status = nfserr_clientid_busy; |
2195 | goto out; | |
2196 | } | |
2197 | } else if (unconf) | |
2198 | clp = unconf; | |
2199 | else { | |
2200 | status = nfserr_stale_clientid; | |
2201 | goto out; | |
2202 | } | |
2203 | ||
2204 | expire_client(clp); | |
2205 | out: | |
2206 | nfs4_unlock_state(); | |
345c2842 MJ |
2207 | return status; |
2208 | } | |
2209 | ||
4dc6ec00 BF |
2210 | __be32 |
2211 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2212 | { | |
57b7b43b | 2213 | __be32 status = 0; |
bcecf1cc | 2214 | |
4dc6ec00 BF |
2215 | if (rc->rca_one_fs) { |
2216 | if (!cstate->current_fh.fh_dentry) | |
2217 | return nfserr_nofilehandle; | |
2218 | /* | |
2219 | * We don't take advantage of the rca_one_fs case. | |
2220 | * That's OK, it's optional, we can safely ignore it. | |
2221 | */ | |
2222 | return nfs_ok; | |
2223 | } | |
bcecf1cc | 2224 | |
4dc6ec00 | 2225 | nfs4_lock_state(); |
bcecf1cc | 2226 | status = nfserr_complete_already; |
a52d726b JL |
2227 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2228 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2229 | goto out; |
2230 | ||
2231 | status = nfserr_stale_clientid; | |
2232 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2233 | /* |
2234 | * The following error isn't really legal. | |
2235 | * But we only get here if the client just explicitly | |
2236 | * destroyed the client. Surely it no longer cares what | |
2237 | * error it gets back on an operation for the dead | |
2238 | * client. | |
2239 | */ | |
bcecf1cc MJ |
2240 | goto out; |
2241 | ||
2242 | status = nfs_ok; | |
2a4317c5 | 2243 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2244 | out: |
4dc6ec00 | 2245 | nfs4_unlock_state(); |
bcecf1cc | 2246 | return status; |
4dc6ec00 BF |
2247 | } |
2248 | ||
b37ad28b | 2249 | __be32 |
b591480b BF |
2250 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2251 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2252 | { |
a084daf5 | 2253 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2254 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2255 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2256 | __be32 status; |
c212cecf SK |
2257 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2258 | ||
63db4632 | 2259 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2260 | nfs4_lock_state(); |
382a62e7 | 2261 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2262 | if (conf) { |
63db4632 | 2263 | /* case 0: */ |
1da177e4 | 2264 | status = nfserr_clid_inuse; |
e203d506 BF |
2265 | if (clp_used_exchangeid(conf)) |
2266 | goto out; | |
026722c2 | 2267 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2268 | char addr_str[INET6_ADDRSTRLEN]; |
2269 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2270 | sizeof(addr_str)); | |
2271 | dprintk("NFSD: setclientid: string in use by client " | |
2272 | "at %s\n", addr_str); | |
1da177e4 LT |
2273 | goto out; |
2274 | } | |
1da177e4 | 2275 | } |
a99454aa | 2276 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2277 | if (unconf) |
2278 | expire_client(unconf); | |
3e772463 | 2279 | status = nfserr_jukebox; |
2216d449 | 2280 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2281 | if (new == NULL) |
2282 | goto out; | |
34b232bb | 2283 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2284 | /* case 1: probable callback update */ |
1da177e4 | 2285 | copy_clid(new, conf); |
34b232bb | 2286 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2287 | gen_clid(new, nn); |
8323c3b2 | 2288 | new->cl_minorversion = 0; |
6f3d772f | 2289 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2290 | add_to_unconfirmed(new); |
1da177e4 LT |
2291 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2292 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2293 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2294 | status = nfs_ok; | |
2295 | out: | |
2296 | nfs4_unlock_state(); | |
2297 | return status; | |
2298 | } | |
2299 | ||
2300 | ||
b37ad28b | 2301 | __be32 |
b591480b BF |
2302 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2303 | struct nfsd4_compound_state *cstate, | |
2304 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2305 | { |
21ab45a4 | 2306 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2307 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2308 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2309 | __be32 status; |
7f2210fa | 2310 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2311 | |
2c142baa | 2312 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2313 | return nfserr_stale_clientid; |
1da177e4 | 2314 | nfs4_lock_state(); |
21ab45a4 | 2315 | |
8daae4dc | 2316 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2317 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2318 | /* |
8695b90a BF |
2319 | * We try hard to give out unique clientid's, so if we get an |
2320 | * attempt to confirm the same clientid with a different cred, | |
2321 | * there's a bug somewhere. Let's charitably assume it's our | |
2322 | * bug. | |
a186e767 | 2323 | */ |
8695b90a BF |
2324 | status = nfserr_serverfault; |
2325 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2326 | goto out; | |
2327 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2328 | goto out; | |
63db4632 | 2329 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2330 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2331 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2332 | status = nfs_ok; |
90d700b7 BF |
2333 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2334 | status = nfserr_stale_clientid; | |
2335 | goto out; | |
2336 | } | |
2337 | status = nfs_ok; | |
2338 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2339 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2340 | nfsd4_probe_callback(conf); | |
2341 | expire_client(unconf); | |
90d700b7 | 2342 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2343 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2344 | if (conf) { |
2345 | status = mark_client_expired(conf); | |
2346 | if (status) | |
2347 | goto out; | |
8695b90a | 2348 | expire_client(conf); |
221a6876 | 2349 | } |
8695b90a | 2350 | move_to_confirmed(unconf); |
f3d03b92 | 2351 | nfsd4_probe_callback(unconf); |
08e8987c | 2352 | } |
1da177e4 | 2353 | out: |
1da177e4 LT |
2354 | nfs4_unlock_state(); |
2355 | return status; | |
2356 | } | |
2357 | ||
32513b40 BF |
2358 | static struct nfs4_file *nfsd4_alloc_file(void) |
2359 | { | |
2360 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2361 | } | |
2362 | ||
1da177e4 | 2363 | /* OPEN Share state helper functions */ |
32513b40 | 2364 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2365 | { |
1da177e4 LT |
2366 | unsigned int hashval = file_hashval(ino); |
2367 | ||
32513b40 | 2368 | atomic_set(&fp->fi_ref, 1); |
32513b40 BF |
2369 | INIT_LIST_HEAD(&fp->fi_stateids); |
2370 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2371 | fp->fi_inode = igrab(ino); | |
2372 | fp->fi_had_conflict = false; | |
2373 | fp->fi_lease = NULL; | |
2374 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2375 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2376 | spin_lock(&recall_lock); | |
89876f8c | 2377 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
32513b40 | 2378 | spin_unlock(&recall_lock); |
1da177e4 LT |
2379 | } |
2380 | ||
e60d4398 | 2381 | static void |
e18b890b | 2382 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2383 | { |
e60d4398 N |
2384 | if (*slab == NULL) |
2385 | return; | |
1a1d92c1 | 2386 | kmem_cache_destroy(*slab); |
e60d4398 | 2387 | *slab = NULL; |
1da177e4 LT |
2388 | } |
2389 | ||
e8ff2a84 | 2390 | void |
1da177e4 LT |
2391 | nfsd4_free_slabs(void) |
2392 | { | |
fe0750e5 BF |
2393 | nfsd4_free_slab(&openowner_slab); |
2394 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2395 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2396 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2397 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2398 | } |
1da177e4 | 2399 | |
72083396 | 2400 | int |
e60d4398 N |
2401 | nfsd4_init_slabs(void) |
2402 | { | |
fe0750e5 BF |
2403 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2404 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2405 | if (openowner_slab == NULL) | |
2406 | goto out_nomem; | |
2407 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2408 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2409 | if (lockowner_slab == NULL) |
e60d4398 N |
2410 | goto out_nomem; |
2411 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2412 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2413 | if (file_slab == NULL) |
2414 | goto out_nomem; | |
5ac049ac | 2415 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2416 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2417 | if (stateid_slab == NULL) |
2418 | goto out_nomem; | |
5b2d21c1 | 2419 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2420 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2421 | if (deleg_slab == NULL) |
2422 | goto out_nomem; | |
e60d4398 N |
2423 | return 0; |
2424 | out_nomem: | |
2425 | nfsd4_free_slabs(); | |
2426 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2427 | return -ENOMEM; | |
1da177e4 LT |
2428 | } |
2429 | ||
fe0750e5 BF |
2430 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2431 | { | |
2432 | kfree(oo->oo_owner.so_owner.data); | |
2433 | kmem_cache_free(openowner_slab, oo); | |
2434 | } | |
2435 | ||
2436 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2437 | { |
fe0750e5 BF |
2438 | kfree(lo->lo_owner.so_owner.data); |
2439 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2440 | } |
2441 | ||
ff194bd9 | 2442 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2443 | { |
ff194bd9 BF |
2444 | rp->rp_status = nfserr_serverfault; |
2445 | rp->rp_buflen = 0; | |
2446 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2447 | } |
2448 | ||
fe0750e5 | 2449 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2450 | { |
1da177e4 | 2451 | struct nfs4_stateowner *sop; |
1da177e4 | 2452 | |
fe0750e5 | 2453 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2454 | if (!sop) |
2455 | return NULL; | |
2456 | ||
2457 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2458 | if (!sop->so_owner.data) { | |
fe0750e5 | 2459 | kmem_cache_free(slab, sop); |
1da177e4 | 2460 | return NULL; |
ff194bd9 BF |
2461 | } |
2462 | sop->so_owner.len = owner->len; | |
2463 | ||
ea1da636 | 2464 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2465 | sop->so_client = clp; |
2466 | init_nfs4_replay(&sop->so_replay); | |
2467 | return sop; | |
2468 | } | |
2469 | ||
fe0750e5 | 2470 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2471 | { |
9b531137 SK |
2472 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2473 | ||
2474 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2475 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2476 | } |
2477 | ||
fe0750e5 | 2478 | static struct nfs4_openowner * |
ff194bd9 | 2479 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2480 | struct nfs4_openowner *oo; |
ff194bd9 | 2481 | |
fe0750e5 BF |
2482 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2483 | if (!oo) | |
ff194bd9 | 2484 | return NULL; |
fe0750e5 BF |
2485 | oo->oo_owner.so_is_open_owner = 1; |
2486 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2487 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2488 | oo->oo_time = 0; |
38c387b5 | 2489 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2490 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2491 | hash_openowner(oo, clp, strhashval); | |
2492 | return oo; | |
1da177e4 LT |
2493 | } |
2494 | ||
996e0938 | 2495 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2496 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2497 | |
3abdb607 | 2498 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
ea1da636 | 2499 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2500 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2501 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2502 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2503 | get_nfs4_file(fp); |
1da177e4 | 2504 | stp->st_file = fp; |
1da177e4 LT |
2505 | stp->st_access_bmap = 0; |
2506 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2507 | set_access(open->op_share_access, stp); |
ce0fc43c | 2508 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2509 | stp->st_openstp = NULL; |
1da177e4 LT |
2510 | } |
2511 | ||
fd39ca9a | 2512 | static void |
73758fed | 2513 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2514 | { |
73758fed SK |
2515 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2516 | ||
fe0750e5 | 2517 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2518 | |
73758fed | 2519 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2520 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2521 | } |
2522 | ||
1da177e4 | 2523 | static int |
599e0a22 BF |
2524 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2525 | clientid_t *clid) | |
2526 | { | |
2527 | return (sop->so_owner.len == owner->len) && | |
2528 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2529 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2530 | } |
2531 | ||
fe0750e5 | 2532 | static struct nfs4_openowner * |
9b531137 SK |
2533 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2534 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2535 | { |
a50d2ad1 BF |
2536 | struct nfs4_stateowner *so; |
2537 | struct nfs4_openowner *oo; | |
d15c077e | 2538 | struct nfs4_client *clp; |
1da177e4 | 2539 | |
9b531137 | 2540 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2541 | if (!so->so_is_open_owner) |
2542 | continue; | |
a50d2ad1 BF |
2543 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2544 | oo = openowner(so); | |
d15c077e BF |
2545 | clp = oo->oo_owner.so_client; |
2546 | if ((bool)clp->cl_minorversion != sessions) | |
2547 | return NULL; | |
a50d2ad1 BF |
2548 | renew_client(oo->oo_owner.so_client); |
2549 | return oo; | |
2550 | } | |
1da177e4 LT |
2551 | } |
2552 | return NULL; | |
2553 | } | |
2554 | ||
2555 | /* search file_hashtbl[] for file */ | |
2556 | static struct nfs4_file * | |
2557 | find_file(struct inode *ino) | |
2558 | { | |
2559 | unsigned int hashval = file_hashval(ino); | |
2560 | struct nfs4_file *fp; | |
2561 | ||
8b671b80 | 2562 | spin_lock(&recall_lock); |
89876f8c | 2563 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2564 | if (fp->fi_inode == ino) { |
2565 | get_nfs4_file(fp); | |
8b671b80 | 2566 | spin_unlock(&recall_lock); |
1da177e4 | 2567 | return fp; |
13cd2184 | 2568 | } |
1da177e4 | 2569 | } |
8b671b80 | 2570 | spin_unlock(&recall_lock); |
1da177e4 LT |
2571 | return NULL; |
2572 | } | |
2573 | ||
1da177e4 LT |
2574 | /* |
2575 | * Called to check deny when READ with all zero stateid or | |
2576 | * WRITE with all zero or all one stateid | |
2577 | */ | |
b37ad28b | 2578 | static __be32 |
1da177e4 LT |
2579 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2580 | { | |
2581 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2582 | struct nfs4_file *fp; | |
dcef0413 | 2583 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2584 | __be32 ret; |
1da177e4 | 2585 | |
1da177e4 | 2586 | fp = find_file(ino); |
13cd2184 N |
2587 | if (!fp) |
2588 | return nfs_ok; | |
b700949b | 2589 | ret = nfserr_locked; |
1da177e4 | 2590 | /* Search for conflicting share reservations */ |
13cd2184 | 2591 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2592 | if (test_deny(deny_type, stp) || |
2593 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2594 | goto out; |
1da177e4 | 2595 | } |
13cd2184 N |
2596 | ret = nfs_ok; |
2597 | out: | |
2598 | put_nfs4_file(fp); | |
2599 | return ret; | |
1da177e4 LT |
2600 | } |
2601 | ||
6b57d9c8 | 2602 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2603 | { |
e8c69d17 BF |
2604 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
2605 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2606 | ||
1da177e4 LT |
2607 | /* We're assuming the state code never drops its reference |
2608 | * without first removing the lease. Since we're in this lease | |
2609 | * callback (and since the lease code is serialized by the kernel | |
2610 | * lock) we know the server hasn't removed the lease yet, we know | |
2611 | * it's safe to take a reference: */ | |
2612 | atomic_inc(&dp->dl_count); | |
2613 | ||
e8c69d17 | 2614 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
1da177e4 | 2615 | |
460781b5 | 2616 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2617 | dp->dl_time = get_seconds(); |
2618 | ||
6b57d9c8 BF |
2619 | nfsd4_cb_recall(dp); |
2620 | } | |
2621 | ||
acfdf5c3 | 2622 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2623 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2624 | { | |
acfdf5c3 BF |
2625 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2626 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2627 | |
7fa10cd1 BF |
2628 | if (!fp) { |
2629 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2630 | return; | |
2631 | } | |
2632 | if (fp->fi_had_conflict) { | |
2633 | WARN(1, "duplicate break on %p\n", fp); | |
2634 | return; | |
2635 | } | |
0272e1fd BF |
2636 | /* |
2637 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2638 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2639 | * in time: |
0272e1fd BF |
2640 | */ |
2641 | fl->fl_break_time = 0; | |
1da177e4 | 2642 | |
5d926e8c | 2643 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2644 | fp->fi_had_conflict = true; |
2645 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2646 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2647 | spin_unlock(&recall_lock); |
1da177e4 LT |
2648 | } |
2649 | ||
1da177e4 LT |
2650 | static |
2651 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2652 | { | |
2653 | if (arg & F_UNLCK) | |
2654 | return lease_modify(onlist, arg); | |
2655 | else | |
2656 | return -EAGAIN; | |
2657 | } | |
2658 | ||
7b021967 | 2659 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2660 | .lm_break = nfsd_break_deleg_cb, |
2661 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2662 | }; |
2663 | ||
7a8711c9 BF |
2664 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2665 | { | |
2666 | if (nfsd4_has_session(cstate)) | |
2667 | return nfs_ok; | |
2668 | if (seqid == so->so_seqid - 1) | |
2669 | return nfserr_replay_me; | |
2670 | if (seqid == so->so_seqid) | |
2671 | return nfs_ok; | |
2672 | return nfserr_bad_seqid; | |
2673 | } | |
1da177e4 | 2674 | |
b37ad28b | 2675 | __be32 |
6668958f | 2676 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 2677 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 2678 | { |
1da177e4 LT |
2679 | clientid_t *clientid = &open->op_clientid; |
2680 | struct nfs4_client *clp = NULL; | |
2681 | unsigned int strhashval; | |
fe0750e5 | 2682 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2683 | __be32 status; |
1da177e4 | 2684 | |
2c142baa | 2685 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2686 | return nfserr_stale_clientid; |
32513b40 BF |
2687 | /* |
2688 | * In case we need it later, after we've already created the | |
2689 | * file and don't want to risk a further failure: | |
2690 | */ | |
2691 | open->op_file = nfsd4_alloc_file(); | |
2692 | if (open->op_file == NULL) | |
2693 | return nfserr_jukebox; | |
1da177e4 | 2694 | |
16bfdaaf | 2695 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 2696 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
2697 | open->op_openowner = oo; |
2698 | if (!oo) { | |
8daae4dc SK |
2699 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2700 | nn); | |
1da177e4 | 2701 | if (clp == NULL) |
0f442aa2 | 2702 | return nfserr_expired; |
bcf130f9 | 2703 | goto new_owner; |
1da177e4 | 2704 | } |
dad1c067 | 2705 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2706 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2707 | clp = oo->oo_owner.so_client; |
2708 | release_openowner(oo); | |
2709 | open->op_openowner = NULL; | |
bcf130f9 | 2710 | goto new_owner; |
0f442aa2 | 2711 | } |
4cdc951b BF |
2712 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2713 | if (status) | |
2714 | return status; | |
2715 | clp = oo->oo_owner.so_client; | |
2716 | goto alloc_stateid; | |
bcf130f9 BF |
2717 | new_owner: |
2718 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2719 | if (oo == NULL) | |
2720 | return nfserr_jukebox; | |
2721 | open->op_openowner = oo; | |
4cdc951b BF |
2722 | alloc_stateid: |
2723 | open->op_stp = nfs4_alloc_stateid(clp); | |
2724 | if (!open->op_stp) | |
2725 | return nfserr_jukebox; | |
0f442aa2 | 2726 | return nfs_ok; |
1da177e4 LT |
2727 | } |
2728 | ||
b37ad28b | 2729 | static inline __be32 |
4a6e43e6 N |
2730 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2731 | { | |
2732 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2733 | return nfserr_openmode; | |
2734 | else | |
2735 | return nfs_ok; | |
2736 | } | |
2737 | ||
f459e453 | 2738 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2739 | { |
f459e453 | 2740 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2741 | } |
2742 | ||
38c2f4b1 | 2743 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2744 | { |
f459e453 | 2745 | struct nfs4_stid *ret; |
24a0111e | 2746 | |
38c2f4b1 | 2747 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2748 | if (!ret) |
2749 | return NULL; | |
2750 | return delegstateid(ret); | |
24a0111e BF |
2751 | } |
2752 | ||
8b289b2c BF |
2753 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2754 | { | |
2755 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2756 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2757 | } | |
2758 | ||
b37ad28b | 2759 | static __be32 |
41d22663 | 2760 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
2761 | struct nfs4_delegation **dp) |
2762 | { | |
2763 | int flags; | |
b37ad28b | 2764 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2765 | |
38c2f4b1 | 2766 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2767 | if (*dp == NULL) |
c44c5eeb | 2768 | goto out; |
24a0111e | 2769 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2770 | status = nfs4_check_delegmode(*dp, flags); |
2771 | if (status) | |
2772 | *dp = NULL; | |
c44c5eeb | 2773 | out: |
8b289b2c | 2774 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2775 | return nfs_ok; |
2776 | if (status) | |
2777 | return status; | |
dad1c067 | 2778 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2779 | return nfs_ok; |
567d9829 N |
2780 | } |
2781 | ||
b37ad28b | 2782 | static __be32 |
dcef0413 | 2783 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2784 | { |
dcef0413 | 2785 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2786 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2787 | |
8beefa24 | 2788 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2789 | /* ignore lock owners */ |
2790 | if (local->st_stateowner->so_is_open_owner == 0) | |
2791 | continue; | |
2792 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2793 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2794 | *stpp = local; |
2795 | /* check for conflicting share reservations */ | |
2796 | if (!test_share(local, open)) | |
77eaae8d | 2797 | return nfserr_share_denied; |
1da177e4 | 2798 | } |
77eaae8d | 2799 | return nfs_ok; |
1da177e4 LT |
2800 | } |
2801 | ||
21fb4016 BF |
2802 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2803 | { | |
2804 | int flags = 0; | |
2805 | ||
2806 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2807 | flags |= NFSD_MAY_READ; | |
2808 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2809 | flags |= NFSD_MAY_WRITE; | |
2810 | return flags; | |
2811 | } | |
2812 | ||
0c12eaff CB |
2813 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2814 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2815 | { |
2816 | __be32 status; | |
0c12eaff CB |
2817 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2818 | int access = nfs4_access_to_access(open->op_share_access); | |
2819 | ||
f9d7562f BF |
2820 | if (!fp->fi_fds[oflag]) { |
2821 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2822 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2823 | if (status) |
2824 | return status; | |
2825 | } | |
2826 | nfs4_file_get_access(fp, oflag); | |
2827 | ||
2828 | return nfs_ok; | |
2829 | } | |
2830 | ||
b37ad28b | 2831 | static inline __be32 |
1da177e4 LT |
2832 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2833 | struct nfsd4_open *open) | |
2834 | { | |
2835 | struct iattr iattr = { | |
2836 | .ia_valid = ATTR_SIZE, | |
2837 | .ia_size = 0, | |
2838 | }; | |
2839 | if (!open->op_truncate) | |
2840 | return 0; | |
2841 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2842 | return nfserr_inval; |
1da177e4 LT |
2843 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2844 | } | |
2845 | ||
b37ad28b | 2846 | static __be32 |
dcef0413 | 2847 | 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 | 2848 | { |
b6d2f1ca | 2849 | u32 op_share_access = open->op_share_access; |
7d947842 | 2850 | bool new_access; |
b37ad28b | 2851 | __be32 status; |
1da177e4 | 2852 | |
82c5ff1b | 2853 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2854 | if (new_access) { |
0c12eaff | 2855 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2856 | if (status) |
2857 | return status; | |
6c26d08f | 2858 | } |
1da177e4 LT |
2859 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2860 | if (status) { | |
f9d7562f | 2861 | if (new_access) { |
f197c271 | 2862 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2863 | nfs4_file_put_access(fp, oflag); |
2864 | } | |
1da177e4 LT |
2865 | return status; |
2866 | } | |
2867 | /* remember the open */ | |
82c5ff1b | 2868 | set_access(op_share_access, stp); |
ce0fc43c | 2869 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2870 | |
2871 | return nfs_ok; | |
2872 | } | |
2873 | ||
2874 | ||
1da177e4 | 2875 | static void |
1255a8f3 | 2876 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2877 | { |
dad1c067 | 2878 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2879 | } |
2880 | ||
14a24e99 BF |
2881 | /* Should we give out recallable state?: */ |
2882 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2883 | { | |
2884 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2885 | return true; | |
2886 | /* | |
2887 | * In the sessions case, since we don't have to establish a | |
2888 | * separate connection for callbacks, we assume it's OK | |
2889 | * until we hear otherwise: | |
2890 | */ | |
2891 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2892 | } | |
2893 | ||
22d38c4c BF |
2894 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2895 | { | |
2896 | struct file_lock *fl; | |
2897 | ||
2898 | fl = locks_alloc_lock(); | |
2899 | if (!fl) | |
2900 | return NULL; | |
2901 | locks_init_lock(fl); | |
2902 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2903 | fl->fl_flags = FL_LEASE; | |
2904 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2905 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2906 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2907 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2908 | return fl; |
2909 | } | |
2910 | ||
edab9782 BF |
2911 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2912 | { | |
acfdf5c3 | 2913 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2914 | struct file_lock *fl; |
2915 | int status; | |
2916 | ||
2917 | fl = nfs4_alloc_init_lease(dp, flag); | |
2918 | if (!fl) | |
2919 | return -ENOMEM; | |
acfdf5c3 | 2920 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2921 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2922 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2923 | if (status) { |
acfdf5c3 | 2924 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2925 | locks_free_lock(fl); |
2926 | return -ENOMEM; | |
2927 | } | |
acfdf5c3 | 2928 | fp->fi_lease = fl; |
cb0942b8 | 2929 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
2930 | atomic_set(&fp->fi_delegees, 1); |
2931 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2932 | return 0; | |
2933 | } | |
2934 | ||
2935 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2936 | { | |
2937 | struct nfs4_file *fp = dp->dl_file; | |
2938 | ||
2939 | if (!fp->fi_lease) | |
2940 | return nfs4_setlease(dp, flag); | |
2941 | spin_lock(&recall_lock); | |
2942 | if (fp->fi_had_conflict) { | |
2943 | spin_unlock(&recall_lock); | |
2944 | return -EAGAIN; | |
2945 | } | |
2946 | atomic_inc(&fp->fi_delegees); | |
2947 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2948 | spin_unlock(&recall_lock); | |
2a74aba7 | 2949 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2950 | return 0; |
2951 | } | |
2952 | ||
4aa8913c BH |
2953 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2954 | { | |
2955 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2956 | if (status == -EAGAIN) | |
2957 | open->op_why_no_deleg = WND4_CONTENTION; | |
2958 | else { | |
2959 | open->op_why_no_deleg = WND4_RESOURCE; | |
2960 | switch (open->op_deleg_want) { | |
2961 | case NFS4_SHARE_WANT_READ_DELEG: | |
2962 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2963 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2964 | break; | |
2965 | case NFS4_SHARE_WANT_CANCEL: | |
2966 | open->op_why_no_deleg = WND4_CANCELLED; | |
2967 | break; | |
2968 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 2969 | WARN_ON_ONCE(1); |
4aa8913c BH |
2970 | } |
2971 | } | |
2972 | } | |
2973 | ||
1da177e4 LT |
2974 | /* |
2975 | * Attempt to hand out a delegation. | |
2976 | */ | |
2977 | static void | |
5ccb0066 SK |
2978 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
2979 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
2980 | { |
2981 | struct nfs4_delegation *dp; | |
fe0750e5 | 2982 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2983 | int cb_up; |
d24433cd | 2984 | int status = 0, flag = 0; |
1da177e4 | 2985 | |
fe0750e5 | 2986 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2987 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2988 | open->op_recall = 0; |
2989 | switch (open->op_claim_type) { | |
2990 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2991 | if (!cb_up) |
7b190fec N |
2992 | open->op_recall = 1; |
2993 | flag = open->op_delegate_type; | |
2994 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2995 | goto out; | |
2996 | break; | |
2997 | case NFS4_OPEN_CLAIM_NULL: | |
2998 | /* Let's not give out any delegations till everyone's | |
2999 | * had the chance to reclaim theirs.... */ | |
5ccb0066 | 3000 | if (locks_in_grace(net)) |
7b190fec | 3001 | goto out; |
dad1c067 | 3002 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
3003 | goto out; |
3004 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
3005 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
3006 | else | |
3007 | flag = NFS4_OPEN_DELEGATE_READ; | |
3008 | break; | |
3009 | default: | |
3010 | goto out; | |
3011 | } | |
1da177e4 | 3012 | |
fe0750e5 | 3013 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
3014 | if (dp == NULL) |
3015 | goto out_no_deleg; | |
acfdf5c3 | 3016 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 3017 | if (status) |
dd239cc0 | 3018 | goto out_free; |
1da177e4 | 3019 | |
d5477a8d | 3020 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3021 | |
8c10cbdb | 3022 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3023 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
3024 | out: |
3025 | open->op_delegate_type = flag; | |
d24433cd BH |
3026 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
3027 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
3028 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
3029 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
3030 | ||
4aa8913c BH |
3031 | /* 4.1 client asking for a delegation? */ |
3032 | if (open->op_deleg_want) | |
3033 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 3034 | } |
dd239cc0 BF |
3035 | return; |
3036 | out_free: | |
24ffb938 | 3037 | unhash_stid(&dp->dl_stid); |
acfdf5c3 | 3038 | nfs4_put_delegation(dp); |
dd239cc0 BF |
3039 | out_no_deleg: |
3040 | flag = NFS4_OPEN_DELEGATE_NONE; | |
3041 | goto out; | |
1da177e4 LT |
3042 | } |
3043 | ||
e27f49c3 BH |
3044 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3045 | struct nfs4_delegation *dp) | |
3046 | { | |
3047 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3048 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3049 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3050 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3051 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3052 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3053 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3054 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3055 | } | |
3056 | /* Otherwise the client must be confused wanting a delegation | |
3057 | * it already has, therefore we don't return | |
3058 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3059 | */ | |
3060 | } | |
3061 | ||
1da177e4 LT |
3062 | /* |
3063 | * called with nfs4_lock_state() held. | |
3064 | */ | |
b37ad28b | 3065 | __be32 |
1da177e4 LT |
3066 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3067 | { | |
6668958f | 3068 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3069 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3070 | struct nfs4_file *fp = NULL; |
3071 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3072 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3073 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3074 | __be32 status; |
1da177e4 | 3075 | |
1da177e4 LT |
3076 | /* |
3077 | * Lookup file; if found, lookup stateid and check open request, | |
3078 | * and check for delegations in the process of being recalled. | |
3079 | * If not found, create the nfs4_file struct | |
3080 | */ | |
3081 | fp = find_file(ino); | |
3082 | if (fp) { | |
3083 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3084 | goto out; | |
41d22663 | 3085 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3086 | if (status) |
3087 | goto out; | |
1da177e4 | 3088 | } else { |
c44c5eeb | 3089 | status = nfserr_bad_stateid; |
8b289b2c | 3090 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3091 | goto out; |
3e772463 | 3092 | status = nfserr_jukebox; |
32513b40 BF |
3093 | fp = open->op_file; |
3094 | open->op_file = NULL; | |
3095 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3096 | } |
3097 | ||
3098 | /* | |
3099 | * OPEN the file, or upgrade an existing OPEN. | |
3100 | * If truncate fails, the OPEN fails. | |
3101 | */ | |
3102 | if (stp) { | |
3103 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3104 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3105 | if (status) |
3106 | goto out; | |
3107 | } else { | |
4cdc951b | 3108 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3109 | if (status) |
3110 | goto out; | |
3111 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3112 | if (status) |
1da177e4 | 3113 | goto out; |
4cdc951b BF |
3114 | stp = open->op_stp; |
3115 | open->op_stp = NULL; | |
996e0938 | 3116 | init_open_stateid(stp, fp, open); |
1da177e4 | 3117 | } |
dcef0413 BF |
3118 | update_stateid(&stp->st_stid.sc_stateid); |
3119 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3120 | |
d24433cd | 3121 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3122 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3123 | |
d24433cd BH |
3124 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3125 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3126 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3127 | goto nodeleg; | |
3128 | } | |
3129 | } | |
3130 | ||
1da177e4 LT |
3131 | /* |
3132 | * Attempt to hand out a delegation. No error return, because the | |
3133 | * OPEN succeeds even if we fail. | |
3134 | */ | |
5ccb0066 | 3135 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3136 | nodeleg: |
1da177e4 LT |
3137 | status = nfs_ok; |
3138 | ||
8c10cbdb | 3139 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3140 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3141 | out: |
d24433cd BH |
3142 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3143 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3144 | open->op_deleg_want) |
3145 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3146 | |
13cd2184 N |
3147 | if (fp) |
3148 | put_nfs4_file(fp); | |
37515177 | 3149 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3150 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3151 | /* |
3152 | * To finish the open response, we just need to set the rflags. | |
3153 | */ | |
3154 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3155 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3156 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3157 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3158 | ||
3159 | return status; | |
3160 | } | |
3161 | ||
d29b20cd BF |
3162 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3163 | { | |
3164 | if (open->op_openowner) { | |
3165 | struct nfs4_openowner *oo = open->op_openowner; | |
3166 | ||
3167 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3168 | list_del_init(&oo->oo_close_lru); | |
3169 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3170 | if (status) { | |
3171 | release_openowner(oo); | |
3172 | open->op_openowner = NULL; | |
3173 | } else | |
3174 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3175 | } | |
3176 | } | |
32513b40 BF |
3177 | if (open->op_file) |
3178 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3179 | if (open->op_stp) |
ef79859e | 3180 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3181 | } |
3182 | ||
9b2ef62b BF |
3183 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
3184 | { | |
3185 | struct nfs4_client *found; | |
3186 | ||
3187 | if (STALE_CLIENTID(clid, nn)) | |
3188 | return nfserr_stale_clientid; | |
3189 | found = find_confirmed_client(clid, session, nn); | |
3190 | if (clp) | |
3191 | *clp = found; | |
3192 | return found ? nfs_ok : nfserr_expired; | |
3193 | } | |
3194 | ||
b37ad28b | 3195 | __be32 |
b591480b BF |
3196 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3197 | clientid_t *clid) | |
1da177e4 LT |
3198 | { |
3199 | struct nfs4_client *clp; | |
b37ad28b | 3200 | __be32 status; |
7f2210fa | 3201 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3202 | |
3203 | nfs4_lock_state(); | |
3204 | dprintk("process_renew(%08x/%08x): starting\n", | |
3205 | clid->cl_boot, clid->cl_id); | |
9b2ef62b BF |
3206 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
3207 | if (status) | |
1da177e4 | 3208 | goto out; |
1da177e4 | 3209 | status = nfserr_cb_path_down; |
ea1da636 | 3210 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3211 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3212 | goto out; |
3213 | status = nfs_ok; | |
3214 | out: | |
3215 | nfs4_unlock_state(); | |
3216 | return status; | |
3217 | } | |
3218 | ||
a76b4319 | 3219 | static void |
12760c66 | 3220 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3221 | { |
33dcc481 | 3222 | /* do nothing if grace period already ended */ |
a51c84ed | 3223 | if (nn->grace_ended) |
33dcc481 JL |
3224 | return; |
3225 | ||
a76b4319 | 3226 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3227 | nn->grace_ended = true; |
12760c66 | 3228 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3229 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3230 | /* |
3231 | * Now that every NFSv4 client has had the chance to recover and | |
3232 | * to see the (possibly new, possibly shorter) lease time, we | |
3233 | * can safely set the next grace time to the current lease time: | |
3234 | */ | |
5284b44e | 3235 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3236 | } |
3237 | ||
fd39ca9a | 3238 | static time_t |
09121281 | 3239 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3240 | { |
3241 | struct nfs4_client *clp; | |
fe0750e5 | 3242 | struct nfs4_openowner *oo; |
1da177e4 LT |
3243 | struct nfs4_delegation *dp; |
3244 | struct list_head *pos, *next, reaplist; | |
3d733711 SK |
3245 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
3246 | time_t t, clientid_val = nn->nfsd4_lease; | |
3247 | time_t u, test_val = nn->nfsd4_lease; | |
1da177e4 LT |
3248 | |
3249 | nfs4_lock_state(); | |
3250 | ||
3251 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3252 | nfsd4_end_grace(nn); |
36acb66b | 3253 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3254 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3255 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3256 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3257 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3258 | t = clp->cl_time - cutoff; | |
3259 | if (clientid_val > t) | |
3260 | clientid_val = t; | |
3261 | break; | |
3262 | } | |
221a6876 | 3263 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3264 | dprintk("NFSD: client in use (clientid %08x)\n", |
3265 | clp->cl_clientid.cl_id); | |
3266 | continue; | |
3267 | } | |
221a6876 | 3268 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3269 | } |
c9a49628 | 3270 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3271 | list_for_each_safe(pos, next, &reaplist) { |
3272 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3273 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3274 | clp->cl_clientid.cl_id); | |
3275 | expire_client(clp); | |
3276 | } | |
1da177e4 | 3277 | spin_lock(&recall_lock); |
e8c69d17 | 3278 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3279 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3280 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3281 | continue; | |
1da177e4 LT |
3282 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
3283 | u = dp->dl_time - cutoff; | |
3284 | if (test_val > u) | |
3285 | test_val = u; | |
3286 | break; | |
3287 | } | |
1da177e4 LT |
3288 | list_move(&dp->dl_recall_lru, &reaplist); |
3289 | } | |
3290 | spin_unlock(&recall_lock); | |
3291 | list_for_each_safe(pos, next, &reaplist) { | |
3292 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3293 | unhash_delegation(dp); |
3294 | } | |
3d733711 | 3295 | test_val = nn->nfsd4_lease; |
73758fed | 3296 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3297 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3298 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3299 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3300 | if (test_val > u) |
3301 | test_val = u; | |
3302 | break; | |
3303 | } | |
fe0750e5 | 3304 | release_openowner(oo); |
1da177e4 LT |
3305 | } |
3306 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3307 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3308 | nfs4_unlock_state(); | |
3309 | return clientid_val; | |
3310 | } | |
3311 | ||
a254b246 HH |
3312 | static struct workqueue_struct *laundry_wq; |
3313 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3314 | |
3315 | static void | |
09121281 | 3316 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3317 | { |
3318 | time_t t; | |
09121281 SK |
3319 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3320 | work); | |
3321 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3322 | laundromat_work); | |
1da177e4 | 3323 | |
09121281 | 3324 | t = nfs4_laundromat(nn); |
1da177e4 | 3325 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3326 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3327 | } |
3328 | ||
f7a4d872 | 3329 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3330 | { |
f7a4d872 BF |
3331 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3332 | return nfserr_bad_stateid; | |
3333 | return nfs_ok; | |
1da177e4 LT |
3334 | } |
3335 | ||
1da177e4 | 3336 | static inline int |
82c5ff1b | 3337 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3338 | { |
82c5ff1b JL |
3339 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3340 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3341 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3342 | } |
3343 | ||
3344 | static inline int | |
82c5ff1b | 3345 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3346 | { |
82c5ff1b JL |
3347 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3348 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3349 | } |
3350 | ||
3351 | static | |
dcef0413 | 3352 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3353 | { |
b37ad28b | 3354 | __be32 status = nfserr_openmode; |
1da177e4 | 3355 | |
02921914 BF |
3356 | /* For lock stateid's, we test the parent open, not the lock: */ |
3357 | if (stp->st_openstp) | |
3358 | stp = stp->st_openstp; | |
82c5ff1b | 3359 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3360 | goto out; |
82c5ff1b | 3361 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3362 | goto out; |
3363 | status = nfs_ok; | |
3364 | out: | |
3365 | return status; | |
3366 | } | |
3367 | ||
b37ad28b | 3368 | static inline __be32 |
5ccb0066 | 3369 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3370 | { |
203a8c8e | 3371 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3372 | return nfs_ok; |
5ccb0066 | 3373 | else if (locks_in_grace(net)) { |
25985edc | 3374 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3375 | * conflicting state; so we must wait out the grace period. */ |
3376 | return nfserr_grace; | |
3377 | } else if (flags & WR_STATE) | |
3378 | return nfs4_share_conflict(current_fh, | |
3379 | NFS4_SHARE_DENY_WRITE); | |
3380 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3381 | return nfs4_share_conflict(current_fh, | |
3382 | NFS4_SHARE_DENY_READ); | |
3383 | } | |
3384 | ||
3385 | /* | |
3386 | * Allow READ/WRITE during grace period on recovered state only for files | |
3387 | * that are not able to provide mandatory locking. | |
3388 | */ | |
3389 | static inline int | |
5ccb0066 | 3390 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3391 | { |
5ccb0066 | 3392 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3393 | } |
3394 | ||
81b82965 BF |
3395 | /* Returns true iff a is later than b: */ |
3396 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3397 | { | |
3398 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3399 | } | |
3400 | ||
57b7b43b | 3401 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3402 | { |
6668958f AA |
3403 | /* |
3404 | * When sessions are used the stateid generation number is ignored | |
3405 | * when it is zero. | |
3406 | */ | |
28dde241 | 3407 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3408 | return nfs_ok; |
3409 | ||
3410 | if (in->si_generation == ref->si_generation) | |
3411 | return nfs_ok; | |
6668958f | 3412 | |
0836f587 | 3413 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3414 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3415 | return nfserr_bad_stateid; |
3416 | /* | |
81b82965 BF |
3417 | * However, we could see a stateid from the past, even from a |
3418 | * non-buggy client. For example, if the client sends a lock | |
3419 | * while some IO is outstanding, the lock may bump si_generation | |
3420 | * while the IO is still in flight. The client could avoid that | |
3421 | * situation by waiting for responses on all the IO requests, | |
3422 | * but better performance may result in retrying IO that | |
3423 | * receives an old_stateid error if requests are rarely | |
3424 | * reordered in flight: | |
0836f587 | 3425 | */ |
81b82965 | 3426 | return nfserr_old_stateid; |
0836f587 BF |
3427 | } |
3428 | ||
7df302f7 | 3429 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3430 | { |
97b7e3b6 BF |
3431 | struct nfs4_stid *s; |
3432 | struct nfs4_ol_stateid *ols; | |
3433 | __be32 status; | |
17456804 | 3434 | |
7df302f7 CL |
3435 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3436 | return nfserr_bad_stateid; | |
3437 | /* Client debugging aid. */ | |
3438 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3439 | char addr_str[INET6_ADDRSTRLEN]; | |
3440 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3441 | sizeof(addr_str)); | |
3442 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3443 | "with incorrect client ID\n", addr_str); | |
3444 | return nfserr_bad_stateid; | |
3445 | } | |
38c2f4b1 | 3446 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3447 | if (!s) |
7df302f7 | 3448 | return nfserr_bad_stateid; |
36279ac1 | 3449 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3450 | if (status) |
97b7e3b6 BF |
3451 | return status; |
3452 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3453 | return nfs_ok; | |
3454 | ols = openlockstateid(s); | |
3455 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3456 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3457 | return nfserr_bad_stateid; |
3458 | return nfs_ok; | |
17456804 BS |
3459 | } |
3460 | ||
3320fef1 SK |
3461 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
3462 | struct nfs4_stid **s, bool sessions, | |
3463 | struct nfsd_net *nn) | |
38c2f4b1 BF |
3464 | { |
3465 | struct nfs4_client *cl; | |
0eb6f20a | 3466 | __be32 status; |
38c2f4b1 BF |
3467 | |
3468 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3469 | return nfserr_bad_stateid; | |
0eb6f20a BF |
3470 | status = lookup_clientid(&stateid->si_opaque.so_clid, sessions, |
3471 | nn, &cl); | |
3472 | if (status == nfserr_stale_clientid) | |
38c2f4b1 | 3473 | return nfserr_stale_stateid; |
0eb6f20a BF |
3474 | if (status) |
3475 | return status; | |
38c2f4b1 BF |
3476 | *s = find_stateid_by_type(cl, stateid, typemask); |
3477 | if (!*s) | |
3478 | return nfserr_bad_stateid; | |
3479 | return nfs_ok; | |
38c2f4b1 BF |
3480 | } |
3481 | ||
1da177e4 LT |
3482 | /* |
3483 | * Checks for stateid operations | |
3484 | */ | |
b37ad28b | 3485 | __be32 |
5ccb0066 | 3486 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3487 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3488 | { |
69064a27 | 3489 | struct nfs4_stid *s; |
dcef0413 | 3490 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3491 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3492 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3493 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3494 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b37ad28b | 3495 | __be32 status; |
1da177e4 | 3496 | |
1da177e4 LT |
3497 | if (filpp) |
3498 | *filpp = NULL; | |
3499 | ||
5ccb0066 | 3500 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3501 | return nfserr_grace; |
3502 | ||
3503 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3504 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3505 | |
3320fef1 SK |
3506 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
3507 | &s, cstate->minorversion, nn); | |
38c2f4b1 BF |
3508 | if (status) |
3509 | return status; | |
69064a27 BF |
3510 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3511 | if (status) | |
3512 | goto out; | |
f7a4d872 BF |
3513 | switch (s->sc_type) { |
3514 | case NFS4_DELEG_STID: | |
69064a27 | 3515 | dp = delegstateid(s); |
dc9bf700 BF |
3516 | status = nfs4_check_delegmode(dp, flags); |
3517 | if (status) | |
3518 | goto out; | |
43b0178e | 3519 | if (filpp) { |
acfdf5c3 | 3520 | *filpp = dp->dl_file->fi_deleg_file; |
063b0fb9 BF |
3521 | if (!*filpp) { |
3522 | WARN_ON_ONCE(1); | |
3523 | status = nfserr_serverfault; | |
3524 | goto out; | |
3525 | } | |
43b0178e | 3526 | } |
f7a4d872 BF |
3527 | break; |
3528 | case NFS4_OPEN_STID: | |
3529 | case NFS4_LOCK_STID: | |
69064a27 | 3530 | stp = openlockstateid(s); |
f7a4d872 BF |
3531 | status = nfs4_check_fh(current_fh, stp); |
3532 | if (status) | |
1da177e4 | 3533 | goto out; |
fe0750e5 | 3534 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3535 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3536 | goto out; |
a4455be0 BF |
3537 | status = nfs4_check_openmode(stp, flags); |
3538 | if (status) | |
1da177e4 | 3539 | goto out; |
f9d7562f BF |
3540 | if (filpp) { |
3541 | if (flags & RD_STATE) | |
3542 | *filpp = find_readable_file(stp->st_file); | |
3543 | else | |
3544 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3545 | } |
f7a4d872 BF |
3546 | break; |
3547 | default: | |
3548 | return nfserr_bad_stateid; | |
1da177e4 LT |
3549 | } |
3550 | status = nfs_ok; | |
3551 | out: | |
3552 | return status; | |
3553 | } | |
3554 | ||
e1ca12df | 3555 | static __be32 |
dcef0413 | 3556 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3557 | { |
fe0750e5 | 3558 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3559 | return nfserr_locks_held; |
3560 | release_lock_stateid(stp); | |
3561 | return nfs_ok; | |
3562 | } | |
3563 | ||
17456804 BS |
3564 | /* |
3565 | * Test if the stateid is valid | |
3566 | */ | |
3567 | __be32 | |
3568 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3569 | struct nfsd4_test_stateid *test_stateid) | |
3570 | { | |
03cfb420 BS |
3571 | struct nfsd4_test_stateid_id *stateid; |
3572 | struct nfs4_client *cl = cstate->session->se_client; | |
3573 | ||
3574 | nfs4_lock_state(); | |
3575 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3576 | stateid->ts_id_status = |
3577 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3578 | nfs4_unlock_state(); |
3579 | ||
17456804 BS |
3580 | return nfs_ok; |
3581 | } | |
3582 | ||
e1ca12df BS |
3583 | __be32 |
3584 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3585 | struct nfsd4_free_stateid *free_stateid) | |
3586 | { | |
3587 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3588 | struct nfs4_stid *s; |
38c2f4b1 | 3589 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3590 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3591 | |
3592 | nfs4_lock_state(); | |
38c2f4b1 | 3593 | s = find_stateid(cl, stateid); |
2da1cec7 | 3594 | if (!s) |
81b82965 | 3595 | goto out; |
2da1cec7 BF |
3596 | switch (s->sc_type) { |
3597 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3598 | ret = nfserr_locks_held; |
3599 | goto out; | |
2da1cec7 BF |
3600 | case NFS4_OPEN_STID: |
3601 | case NFS4_LOCK_STID: | |
3602 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3603 | if (ret) | |
3604 | goto out; | |
3605 | if (s->sc_type == NFS4_LOCK_STID) | |
3606 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3607 | else | |
3608 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3609 | break; |
3610 | default: | |
3611 | ret = nfserr_bad_stateid; | |
e1ca12df | 3612 | } |
e1ca12df BS |
3613 | out: |
3614 | nfs4_unlock_state(); | |
3615 | return ret; | |
3616 | } | |
3617 | ||
4c4cd222 N |
3618 | static inline int |
3619 | setlkflg (int type) | |
3620 | { | |
3621 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3622 | RD_STATE : WR_STATE; | |
3623 | } | |
1da177e4 | 3624 | |
dcef0413 | 3625 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3626 | { |
3627 | struct svc_fh *current_fh = &cstate->current_fh; | |
3628 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3629 | __be32 status; | |
3630 | ||
c0a5d93e BF |
3631 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3632 | if (status) | |
3633 | return status; | |
f7a4d872 BF |
3634 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3635 | /* | |
3636 | * "Closed" stateid's exist *only* to return | |
3637 | * nfserr_replay_me from the previous step. | |
3638 | */ | |
3639 | return nfserr_bad_stateid; | |
3640 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3641 | if (status) | |
3642 | return status; | |
3643 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3644 | } |
3645 | ||
1da177e4 LT |
3646 | /* |
3647 | * Checks for sequence id mutating operations. | |
3648 | */ | |
b37ad28b | 3649 | static __be32 |
dd453dfd | 3650 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3651 | stateid_t *stateid, char typemask, |
3320fef1 SK |
3652 | struct nfs4_ol_stateid **stpp, |
3653 | struct nfsd_net *nn) | |
1da177e4 | 3654 | { |
0836f587 | 3655 | __be32 status; |
38c2f4b1 | 3656 | struct nfs4_stid *s; |
1da177e4 | 3657 | |
8c10cbdb BH |
3658 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3659 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3660 | |
1da177e4 | 3661 | *stpp = NULL; |
3320fef1 SK |
3662 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
3663 | cstate->minorversion, nn); | |
c0a5d93e BF |
3664 | if (status) |
3665 | return status; | |
38c2f4b1 | 3666 | *stpp = openlockstateid(s); |
3d74e6a5 BF |
3667 | if (!nfsd4_has_session(cstate)) |
3668 | cstate->replay_owner = (*stpp)->st_stateowner; | |
1da177e4 | 3669 | |
c0a5d93e BF |
3670 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3671 | } | |
39325bd0 | 3672 | |
3320fef1 SK |
3673 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3674 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
3675 | { |
3676 | __be32 status; | |
3677 | struct nfs4_openowner *oo; | |
1da177e4 | 3678 | |
c0a5d93e | 3679 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 3680 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
3681 | if (status) |
3682 | return status; | |
c0a5d93e | 3683 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3684 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3685 | return nfserr_bad_stateid; |
3a4f98bb | 3686 | return nfs_ok; |
1da177e4 LT |
3687 | } |
3688 | ||
b37ad28b | 3689 | __be32 |
ca364317 | 3690 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3691 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3692 | { |
b37ad28b | 3693 | __be32 status; |
fe0750e5 | 3694 | struct nfs4_openowner *oo; |
dcef0413 | 3695 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3696 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3697 | |
3698 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3699 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3700 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3701 | |
ca364317 | 3702 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3703 | if (status) |
3704 | return status; | |
1da177e4 LT |
3705 | |
3706 | nfs4_lock_state(); | |
3707 | ||
9072d5c6 | 3708 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3709 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 3710 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 3711 | if (status) |
68b66e82 | 3712 | goto out; |
fe0750e5 | 3713 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3714 | status = nfserr_bad_stateid; |
dad1c067 | 3715 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3716 | goto out; |
dad1c067 | 3717 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3718 | update_stateid(&stp->st_stid.sc_stateid); |
3719 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3720 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3721 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3722 | |
2a4317c5 | 3723 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3724 | status = nfs_ok; |
1da177e4 | 3725 | out: |
9411b1d4 | 3726 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3727 | if (!cstate->replay_owner) |
3728 | nfs4_unlock_state(); | |
1da177e4 LT |
3729 | return status; |
3730 | } | |
3731 | ||
6409a5a6 | 3732 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3733 | { |
82c5ff1b | 3734 | if (!test_access(access, stp)) |
6409a5a6 BF |
3735 | return; |
3736 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3737 | clear_access(access, stp); |
6409a5a6 | 3738 | } |
f197c271 | 3739 | |
6409a5a6 BF |
3740 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3741 | { | |
3742 | switch (to_access) { | |
3743 | case NFS4_SHARE_ACCESS_READ: | |
3744 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3745 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3746 | break; | |
3747 | case NFS4_SHARE_ACCESS_WRITE: | |
3748 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3749 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3750 | break; | |
3751 | case NFS4_SHARE_ACCESS_BOTH: | |
3752 | break; | |
3753 | default: | |
063b0fb9 | 3754 | WARN_ON_ONCE(1); |
1da177e4 LT |
3755 | } |
3756 | } | |
3757 | ||
3758 | static void | |
ce0fc43c | 3759 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3760 | { |
3761 | int i; | |
3762 | for (i = 0; i < 4; i++) { | |
3763 | if ((i & deny) != i) | |
ce0fc43c | 3764 | clear_deny(i, stp); |
1da177e4 LT |
3765 | } |
3766 | } | |
3767 | ||
b37ad28b | 3768 | __be32 |
ca364317 BF |
3769 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3770 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3771 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3772 | { |
b37ad28b | 3773 | __be32 status; |
dcef0413 | 3774 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3775 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3776 | |
3777 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3778 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3779 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3780 | |
c30e92df | 3781 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3782 | if (od->od_deleg_want) |
3783 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3784 | od->od_deleg_want); | |
1da177e4 LT |
3785 | |
3786 | nfs4_lock_state(); | |
c0a5d93e | 3787 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 3788 | &od->od_stateid, &stp, nn); |
9072d5c6 | 3789 | if (status) |
1da177e4 | 3790 | goto out; |
1da177e4 | 3791 | status = nfserr_inval; |
82c5ff1b JL |
3792 | if (!test_access(od->od_share_access, stp)) { |
3793 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3794 | stp->st_access_bmap, od->od_share_access); |
3795 | goto out; | |
3796 | } | |
ce0fc43c | 3797 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3798 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3799 | stp->st_deny_bmap, od->od_share_deny); | |
3800 | goto out; | |
3801 | } | |
6409a5a6 | 3802 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3803 | |
ce0fc43c | 3804 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3805 | |
dcef0413 BF |
3806 | update_stateid(&stp->st_stid.sc_stateid); |
3807 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3808 | status = nfs_ok; |
3809 | out: | |
9411b1d4 | 3810 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3811 | if (!cstate->replay_owner) |
3812 | nfs4_unlock_state(); | |
1da177e4 LT |
3813 | return status; |
3814 | } | |
3815 | ||
f7a4d872 BF |
3816 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
3817 | { | |
3818 | unhash_open_stateid(s); | |
3819 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3820 | } |
3821 | ||
1da177e4 LT |
3822 | /* |
3823 | * nfs4_unlock_state() called after encode | |
3824 | */ | |
b37ad28b | 3825 | __be32 |
ca364317 | 3826 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3827 | struct nfsd4_close *close) |
1da177e4 | 3828 | { |
b37ad28b | 3829 | __be32 status; |
fe0750e5 | 3830 | struct nfs4_openowner *oo; |
dcef0413 | 3831 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
3832 | struct net *net = SVC_NET(rqstp); |
3833 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
3834 | |
3835 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3836 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3837 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3838 | |
3839 | nfs4_lock_state(); | |
f7a4d872 BF |
3840 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3841 | &close->cl_stateid, | |
3842 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 3843 | &stp, nn); |
9411b1d4 | 3844 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 3845 | if (status) |
1da177e4 | 3846 | goto out; |
fe0750e5 | 3847 | oo = openowner(stp->st_stateowner); |
dcef0413 BF |
3848 | update_stateid(&stp->st_stid.sc_stateid); |
3849 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3850 | |
f7a4d872 | 3851 | nfsd4_close_open_stateid(stp); |
9411b1d4 BF |
3852 | |
3853 | if (cstate->minorversion) { | |
3854 | unhash_stid(&stp->st_stid); | |
3855 | free_generic_stateid(stp); | |
3856 | } else | |
3857 | oo->oo_last_closed_stid = stp; | |
04ef5954 | 3858 | |
74dbafaf | 3859 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3d74e6a5 | 3860 | if (cstate->minorversion) |
74dbafaf | 3861 | release_openowner(oo); |
3d74e6a5 | 3862 | else { |
74dbafaf BF |
3863 | /* |
3864 | * In the 4.0 case we need to keep the owners around a | |
3865 | * little while to handle CLOSE replay. | |
3866 | */ | |
3867 | if (list_empty(&oo->oo_owner.so_stateids)) | |
73758fed | 3868 | move_to_close_lru(oo, SVC_NET(rqstp)); |
74dbafaf BF |
3869 | } |
3870 | } | |
1da177e4 | 3871 | out: |
5ec094c1 BF |
3872 | if (!cstate->replay_owner) |
3873 | nfs4_unlock_state(); | |
1da177e4 LT |
3874 | return status; |
3875 | } | |
3876 | ||
b37ad28b | 3877 | __be32 |
ca364317 BF |
3878 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3879 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3880 | { |
203a8c8e BF |
3881 | struct nfs4_delegation *dp; |
3882 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3883 | struct nfs4_stid *s; |
b37ad28b | 3884 | __be32 status; |
3320fef1 | 3885 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3886 | |
ca364317 | 3887 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 3888 | return status; |
1da177e4 LT |
3889 | |
3890 | nfs4_lock_state(); | |
3320fef1 SK |
3891 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
3892 | cstate->minorversion, nn); | |
38c2f4b1 | 3893 | if (status) |
203a8c8e | 3894 | goto out; |
38c2f4b1 | 3895 | dp = delegstateid(s); |
d5477a8d | 3896 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3897 | if (status) |
3898 | goto out; | |
203a8c8e BF |
3899 | |
3900 | unhash_delegation(dp); | |
1da177e4 | 3901 | out: |
203a8c8e BF |
3902 | nfs4_unlock_state(); |
3903 | ||
1da177e4 LT |
3904 | return status; |
3905 | } | |
3906 | ||
3907 | ||
1da177e4 | 3908 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3909 | |
009673b4 | 3910 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
1da177e4 | 3911 | |
87df4de8 BH |
3912 | static inline u64 |
3913 | end_offset(u64 start, u64 len) | |
3914 | { | |
3915 | u64 end; | |
3916 | ||
3917 | end = start + len; | |
3918 | return end >= start ? end: NFS4_MAX_UINT64; | |
3919 | } | |
3920 | ||
3921 | /* last octet in a range */ | |
3922 | static inline u64 | |
3923 | last_byte_offset(u64 start, u64 len) | |
3924 | { | |
3925 | u64 end; | |
3926 | ||
063b0fb9 | 3927 | WARN_ON_ONCE(!len); |
87df4de8 BH |
3928 | end = start + len; |
3929 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3930 | } | |
3931 | ||
009673b4 | 3932 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3933 | { |
3934 | return (file_hashval(inode) + cl_id | |
3935 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3936 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3937 | } |
3938 | ||
1da177e4 LT |
3939 | /* |
3940 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3941 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3942 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3943 | * locking, this prevents us from being completely protocol-compliant. The | |
3944 | * real solution to this problem is to start using unsigned file offsets in | |
3945 | * the VFS, but this is a very deep change! | |
3946 | */ | |
3947 | static inline void | |
3948 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3949 | { | |
3950 | if (lock->fl_start < 0) | |
3951 | lock->fl_start = OFFSET_MAX; | |
3952 | if (lock->fl_end < 0) | |
3953 | lock->fl_end = OFFSET_MAX; | |
3954 | } | |
3955 | ||
d5b9026a N |
3956 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3957 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3958 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3959 | }; |
1da177e4 LT |
3960 | |
3961 | static inline void | |
3962 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3963 | { | |
fe0750e5 | 3964 | struct nfs4_lockowner *lo; |
1da177e4 | 3965 | |
d5b9026a | 3966 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3967 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3968 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3969 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3970 | if (!deny->ld_owner.data) |
3971 | /* We just don't care that much */ | |
3972 | goto nevermind; | |
fe0750e5 BF |
3973 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3974 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3975 | } else { |
7c13f344 BF |
3976 | nevermind: |
3977 | deny->ld_owner.len = 0; | |
3978 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3979 | deny->ld_clientid.cl_boot = 0; |
3980 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3981 | } |
3982 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3983 | deny->ld_length = NFS4_MAX_UINT64; |
3984 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3985 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3986 | deny->ld_type = NFS4_READ_LT; | |
3987 | if (fl->fl_type != F_RDLCK) | |
3988 | deny->ld_type = NFS4_WRITE_LT; | |
3989 | } | |
3990 | ||
b93d87c1 BF |
3991 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3992 | { | |
3993 | struct nfs4_ol_stateid *lst; | |
3994 | ||
3995 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3996 | return false; | |
3997 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3998 | struct nfs4_ol_stateid, st_perstateowner); | |
3999 | return lst->st_file->fi_inode == inode; | |
4000 | } | |
4001 | ||
fe0750e5 BF |
4002 | static struct nfs4_lockowner * |
4003 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
20e9e2bc | 4004 | struct xdr_netobj *owner, struct nfsd_net *nn) |
1da177e4 | 4005 | { |
009673b4 | 4006 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 4007 | struct nfs4_lockowner *lo; |
1da177e4 | 4008 | |
20e9e2bc | 4009 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
4010 | if (same_lockowner_ino(lo, inode, clid, owner)) |
4011 | return lo; | |
1da177e4 LT |
4012 | } |
4013 | return NULL; | |
4014 | } | |
4015 | ||
dcef0413 | 4016 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 4017 | { |
009673b4 BF |
4018 | struct inode *inode = open_stp->st_file->fi_inode; |
4019 | unsigned int inohash = lockowner_ino_hashval(inode, | |
4020 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
9b531137 | 4021 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
009673b4 | 4022 | |
9b531137 | 4023 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
20e9e2bc | 4024 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 4025 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
4026 | } |
4027 | ||
1da177e4 LT |
4028 | /* |
4029 | * Alloc a lock owner structure. | |
4030 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4031 | * occurred. |
1da177e4 | 4032 | * |
16bfdaaf | 4033 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4034 | */ |
4035 | ||
fe0750e5 | 4036 | static struct nfs4_lockowner * |
dcef0413 | 4037 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4038 | struct nfs4_lockowner *lo; |
1da177e4 | 4039 | |
fe0750e5 BF |
4040 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4041 | if (!lo) | |
1da177e4 | 4042 | return NULL; |
fe0750e5 BF |
4043 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4044 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4045 | /* It is the openowner seqid that will be incremented in encode in the |
4046 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4047 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4048 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4049 | return lo; | |
1da177e4 LT |
4050 | } |
4051 | ||
dcef0413 BF |
4052 | static struct nfs4_ol_stateid * |
4053 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4054 | { |
dcef0413 | 4055 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4056 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4057 | |
996e0938 | 4058 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4059 | if (stp == NULL) |
6136d2b4 | 4060 | return NULL; |
3abdb607 | 4061 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4062 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4063 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4064 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4065 | get_nfs4_file(fp); |
1da177e4 | 4066 | stp->st_file = fp; |
0997b173 | 4067 | stp->st_access_bmap = 0; |
1da177e4 | 4068 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4069 | stp->st_openstp = open_stp; |
1da177e4 LT |
4070 | return stp; |
4071 | } | |
4072 | ||
fd39ca9a | 4073 | static int |
1da177e4 LT |
4074 | check_lock_length(u64 offset, u64 length) |
4075 | { | |
87df4de8 | 4076 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4077 | LOFF_OVERFLOW(offset, length))); |
4078 | } | |
4079 | ||
dcef0413 | 4080 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4081 | { |
4082 | struct nfs4_file *fp = lock_stp->st_file; | |
4083 | int oflag = nfs4_access_to_omode(access); | |
4084 | ||
82c5ff1b | 4085 | if (test_access(access, lock_stp)) |
0997b173 BF |
4086 | return; |
4087 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4088 | set_access(access, lock_stp); |
0997b173 BF |
4089 | } |
4090 | ||
2355c596 | 4091 | 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 |
4092 | { |
4093 | struct nfs4_file *fi = ost->st_file; | |
4094 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4095 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4096 | struct nfs4_lockowner *lo; | |
4097 | unsigned int strhashval; | |
20e9e2bc | 4098 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4099 | |
20e9e2bc SK |
4100 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
4101 | &lock->v.new.owner, nn); | |
64a284d0 BF |
4102 | if (lo) { |
4103 | if (!cstate->minorversion) | |
4104 | return nfserr_bad_seqid; | |
4105 | /* XXX: a lockowner always has exactly one stateid: */ | |
4106 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4107 | struct nfs4_ol_stateid, st_perstateowner); | |
4108 | return nfs_ok; | |
4109 | } | |
16bfdaaf | 4110 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4111 | &lock->v.new.owner); |
4112 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4113 | if (lo == NULL) | |
4114 | return nfserr_jukebox; | |
4115 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4116 | if (*lst == NULL) { | |
4117 | release_lockowner(lo); | |
4118 | return nfserr_jukebox; | |
4119 | } | |
4120 | *new = true; | |
4121 | return nfs_ok; | |
4122 | } | |
4123 | ||
1da177e4 LT |
4124 | /* |
4125 | * LOCK operation | |
4126 | */ | |
b37ad28b | 4127 | __be32 |
ca364317 | 4128 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4129 | struct nfsd4_lock *lock) |
1da177e4 | 4130 | { |
fe0750e5 BF |
4131 | struct nfs4_openowner *open_sop = NULL; |
4132 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4133 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4134 | struct file *filp = NULL; |
21179d81 JL |
4135 | struct file_lock *file_lock = NULL; |
4136 | struct file_lock *conflock = NULL; | |
b37ad28b | 4137 | __be32 status = 0; |
64a284d0 | 4138 | bool new_state = false; |
b34f27aa | 4139 | int lkflg; |
b8dd7b9a | 4140 | int err; |
3320fef1 SK |
4141 | struct net *net = SVC_NET(rqstp); |
4142 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4143 | |
4144 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4145 | (long long) lock->lk_offset, | |
4146 | (long long) lock->lk_length); | |
4147 | ||
1da177e4 LT |
4148 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4149 | return nfserr_inval; | |
4150 | ||
ca364317 | 4151 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4152 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4153 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4154 | return status; | |
4155 | } | |
4156 | ||
1da177e4 LT |
4157 | nfs4_lock_state(); |
4158 | ||
4159 | if (lock->lk_is_new) { | |
dcef0413 | 4160 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4161 | |
4162 | if (nfsd4_has_session(cstate)) | |
4163 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4164 | memcpy(&lock->v.new.clientid, | |
4165 | &cstate->session->se_client->cl_clientid, | |
4166 | sizeof(clientid_t)); | |
4167 | ||
1da177e4 | 4168 | status = nfserr_stale_clientid; |
2c142baa | 4169 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4170 | goto out; |
1da177e4 | 4171 | |
1da177e4 | 4172 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4173 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4174 | lock->lk_new_open_seqid, |
4175 | &lock->lk_new_open_stateid, | |
3320fef1 | 4176 | &open_stp, nn); |
37515177 | 4177 | if (status) |
1da177e4 | 4178 | goto out; |
fe0750e5 | 4179 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4180 | status = nfserr_bad_stateid; |
684e5638 | 4181 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4182 | &lock->v.new.clientid)) |
4183 | goto out; | |
64a284d0 BF |
4184 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4185 | &lock_stp, &new_state); | |
e1aaa891 | 4186 | } else |
dd453dfd | 4187 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4188 | lock->lk_old_lock_seqid, |
4189 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4190 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4191 | if (status) |
4192 | goto out; | |
64a284d0 | 4193 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4194 | |
b34f27aa BF |
4195 | lkflg = setlkflg(lock->lk_type); |
4196 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4197 | if (status) | |
4198 | goto out; | |
4199 | ||
0dd395dc | 4200 | status = nfserr_grace; |
3320fef1 | 4201 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4202 | goto out; |
4203 | status = nfserr_no_grace; | |
3320fef1 | 4204 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4205 | goto out; |
4206 | ||
21179d81 JL |
4207 | file_lock = locks_alloc_lock(); |
4208 | if (!file_lock) { | |
4209 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4210 | status = nfserr_jukebox; | |
4211 | goto out; | |
4212 | } | |
4213 | ||
4214 | locks_init_lock(file_lock); | |
1da177e4 LT |
4215 | switch (lock->lk_type) { |
4216 | case NFS4_READ_LT: | |
4217 | case NFS4_READW_LT: | |
0997b173 BF |
4218 | filp = find_readable_file(lock_stp->st_file); |
4219 | if (filp) | |
4220 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4221 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4222 | break; |
1da177e4 LT |
4223 | case NFS4_WRITE_LT: |
4224 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4225 | filp = find_writeable_file(lock_stp->st_file); |
4226 | if (filp) | |
4227 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4228 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4229 | break; |
1da177e4 LT |
4230 | default: |
4231 | status = nfserr_inval; | |
4232 | goto out; | |
4233 | } | |
f9d7562f BF |
4234 | if (!filp) { |
4235 | status = nfserr_openmode; | |
4236 | goto out; | |
4237 | } | |
21179d81 JL |
4238 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4239 | file_lock->fl_pid = current->tgid; | |
4240 | file_lock->fl_file = filp; | |
4241 | file_lock->fl_flags = FL_POSIX; | |
4242 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4243 | file_lock->fl_start = lock->lk_offset; | |
4244 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4245 | nfs4_transform_lock_offset(file_lock); | |
4246 | ||
4247 | conflock = locks_alloc_lock(); | |
4248 | if (!conflock) { | |
4249 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4250 | status = nfserr_jukebox; | |
4251 | goto out; | |
4252 | } | |
1da177e4 | 4253 | |
21179d81 | 4254 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4255 | switch (-err) { |
1da177e4 | 4256 | case 0: /* success! */ |
dcef0413 BF |
4257 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4258 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4259 | sizeof(stateid_t)); |
b8dd7b9a | 4260 | status = 0; |
eb76b3fd AA |
4261 | break; |
4262 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4263 | status = nfserr_denied; | |
4264 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4265 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4266 | break; |
1da177e4 LT |
4267 | case (EDEADLK): |
4268 | status = nfserr_deadlock; | |
eb76b3fd | 4269 | break; |
3e772463 | 4270 | default: |
fd85b817 | 4271 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4272 | status = nfserrno(err); |
eb76b3fd | 4273 | break; |
1da177e4 | 4274 | } |
1da177e4 | 4275 | out: |
64a284d0 | 4276 | if (status && new_state) |
f044ff83 | 4277 | release_lockowner(lock_sop); |
9411b1d4 | 4278 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4279 | if (!cstate->replay_owner) |
4280 | nfs4_unlock_state(); | |
21179d81 JL |
4281 | if (file_lock) |
4282 | locks_free_lock(file_lock); | |
4283 | if (conflock) | |
4284 | locks_free_lock(conflock); | |
1da177e4 LT |
4285 | return status; |
4286 | } | |
4287 | ||
55ef1274 BF |
4288 | /* |
4289 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4290 | * so we do a temporary open here just to get an open file to pass to | |
4291 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4292 | * inode operation.) | |
4293 | */ | |
04da6e9d | 4294 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4295 | { |
4296 | struct file *file; | |
04da6e9d AV |
4297 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4298 | if (!err) { | |
4299 | err = nfserrno(vfs_test_lock(file, lock)); | |
4300 | nfsd_close(file); | |
4301 | } | |
55ef1274 BF |
4302 | return err; |
4303 | } | |
4304 | ||
1da177e4 LT |
4305 | /* |
4306 | * LOCKT operation | |
4307 | */ | |
b37ad28b | 4308 | __be32 |
ca364317 BF |
4309 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4310 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4311 | { |
4312 | struct inode *inode; | |
21179d81 | 4313 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4314 | struct nfs4_lockowner *lo; |
b37ad28b | 4315 | __be32 status; |
7f2210fa | 4316 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4317 | |
5ccb0066 | 4318 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4319 | return nfserr_grace; |
4320 | ||
4321 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4322 | return nfserr_inval; | |
4323 | ||
1da177e4 LT |
4324 | nfs4_lock_state(); |
4325 | ||
9b2ef62b BF |
4326 | if (!nfsd4_has_session(cstate)) { |
4327 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); | |
4328 | if (status) | |
4329 | goto out; | |
4330 | } | |
1da177e4 | 4331 | |
75c096f7 | 4332 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4333 | goto out; |
1da177e4 | 4334 | |
ca364317 | 4335 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4336 | file_lock = locks_alloc_lock(); |
4337 | if (!file_lock) { | |
4338 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4339 | status = nfserr_jukebox; | |
4340 | goto out; | |
4341 | } | |
4342 | locks_init_lock(file_lock); | |
1da177e4 LT |
4343 | switch (lockt->lt_type) { |
4344 | case NFS4_READ_LT: | |
4345 | case NFS4_READW_LT: | |
21179d81 | 4346 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4347 | break; |
4348 | case NFS4_WRITE_LT: | |
4349 | case NFS4_WRITEW_LT: | |
21179d81 | 4350 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4351 | break; |
4352 | default: | |
2fdada03 | 4353 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4354 | status = nfserr_inval; |
4355 | goto out; | |
4356 | } | |
4357 | ||
20e9e2bc | 4358 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4359 | if (lo) |
21179d81 JL |
4360 | file_lock->fl_owner = (fl_owner_t)lo; |
4361 | file_lock->fl_pid = current->tgid; | |
4362 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4363 | |
21179d81 JL |
4364 | file_lock->fl_start = lockt->lt_offset; |
4365 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4366 | |
21179d81 | 4367 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4368 | |
21179d81 | 4369 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4370 | if (status) |
fd85b817 | 4371 | goto out; |
04da6e9d | 4372 | |
21179d81 | 4373 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4374 | status = nfserr_denied; |
21179d81 | 4375 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4376 | } |
4377 | out: | |
4378 | nfs4_unlock_state(); | |
21179d81 JL |
4379 | if (file_lock) |
4380 | locks_free_lock(file_lock); | |
1da177e4 LT |
4381 | return status; |
4382 | } | |
4383 | ||
b37ad28b | 4384 | __be32 |
ca364317 | 4385 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4386 | struct nfsd4_locku *locku) |
1da177e4 | 4387 | { |
eb2099f3 | 4388 | struct nfs4_lockowner *lo; |
dcef0413 | 4389 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4390 | struct file *filp = NULL; |
21179d81 | 4391 | struct file_lock *file_lock = NULL; |
b37ad28b | 4392 | __be32 status; |
b8dd7b9a | 4393 | int err; |
3320fef1 SK |
4394 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4395 | ||
1da177e4 LT |
4396 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4397 | (long long) locku->lu_offset, | |
4398 | (long long) locku->lu_length); | |
4399 | ||
4400 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4401 | return nfserr_inval; | |
4402 | ||
4403 | nfs4_lock_state(); | |
4404 | ||
9072d5c6 | 4405 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4406 | &locku->lu_stateid, NFS4_LOCK_STID, |
4407 | &stp, nn); | |
9072d5c6 | 4408 | if (status) |
1da177e4 | 4409 | goto out; |
f9d7562f BF |
4410 | filp = find_any_file(stp->st_file); |
4411 | if (!filp) { | |
4412 | status = nfserr_lock_range; | |
4413 | goto out; | |
4414 | } | |
21179d81 JL |
4415 | file_lock = locks_alloc_lock(); |
4416 | if (!file_lock) { | |
4417 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4418 | status = nfserr_jukebox; | |
4419 | goto out; | |
4420 | } | |
eb2099f3 | 4421 | lo = lockowner(stp->st_stateowner); |
21179d81 JL |
4422 | locks_init_lock(file_lock); |
4423 | file_lock->fl_type = F_UNLCK; | |
eb2099f3 | 4424 | file_lock->fl_owner = (fl_owner_t)lo; |
21179d81 JL |
4425 | file_lock->fl_pid = current->tgid; |
4426 | file_lock->fl_file = filp; | |
4427 | file_lock->fl_flags = FL_POSIX; | |
4428 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4429 | file_lock->fl_start = locku->lu_offset; | |
4430 | ||
4431 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4432 | locku->lu_length); | |
4433 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 4434 | |
21179d81 | 4435 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4436 | if (err) { |
fd85b817 | 4437 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4438 | goto out_nfserr; |
4439 | } | |
dcef0413 BF |
4440 | update_stateid(&stp->st_stid.sc_stateid); |
4441 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4442 | |
eb2099f3 BF |
4443 | if (nfsd4_has_session(cstate) && !check_for_locks(stp->st_file, lo)) { |
4444 | WARN_ON_ONCE(cstate->replay_owner); | |
4445 | release_lockowner(lo); | |
4446 | } | |
4447 | ||
1da177e4 | 4448 | out: |
9411b1d4 | 4449 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
4450 | if (!cstate->replay_owner) |
4451 | nfs4_unlock_state(); | |
21179d81 JL |
4452 | if (file_lock) |
4453 | locks_free_lock(file_lock); | |
1da177e4 LT |
4454 | return status; |
4455 | ||
4456 | out_nfserr: | |
b8dd7b9a | 4457 | status = nfserrno(err); |
1da177e4 LT |
4458 | goto out; |
4459 | } | |
4460 | ||
4461 | /* | |
4462 | * returns | |
4463 | * 1: locks held by lockowner | |
4464 | * 0: no locks held by lockowner | |
4465 | */ | |
4466 | static int | |
fe0750e5 | 4467 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4468 | { |
4469 | struct file_lock **flpp; | |
f9d7562f | 4470 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4471 | int status = 0; |
4472 | ||
b89f4321 | 4473 | lock_flocks(); |
1da177e4 | 4474 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4475 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4476 | status = 1; |
4477 | goto out; | |
796dadfd | 4478 | } |
1da177e4 LT |
4479 | } |
4480 | out: | |
b89f4321 | 4481 | unlock_flocks(); |
1da177e4 LT |
4482 | return status; |
4483 | } | |
4484 | ||
b37ad28b | 4485 | __be32 |
b591480b BF |
4486 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4487 | struct nfsd4_compound_state *cstate, | |
4488 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4489 | { |
4490 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4491 | struct nfs4_stateowner *sop; |
fe0750e5 | 4492 | struct nfs4_lockowner *lo; |
dcef0413 | 4493 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4494 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4495 | struct list_head matches; |
16bfdaaf | 4496 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4497 | __be32 status; |
7f2210fa | 4498 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4499 | |
4500 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4501 | clid->cl_boot, clid->cl_id); | |
4502 | ||
1da177e4 LT |
4503 | nfs4_lock_state(); |
4504 | ||
9b2ef62b BF |
4505 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
4506 | if (status) | |
4507 | goto out; | |
4508 | ||
3e9e3dbe | 4509 | status = nfserr_locks_held; |
3e9e3dbe | 4510 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4511 | |
9b531137 | 4512 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
4513 | if (sop->so_is_open_owner) |
4514 | continue; | |
06f1f864 BF |
4515 | if (!same_owner_str(sop, owner, clid)) |
4516 | continue; | |
4517 | list_for_each_entry(stp, &sop->so_stateids, | |
4518 | st_perstateowner) { | |
4519 | lo = lockowner(sop); | |
4520 | if (check_for_locks(stp->st_file, lo)) | |
4521 | goto out; | |
4522 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4523 | } |
3e9e3dbe N |
4524 | } |
4525 | /* Clients probably won't expect us to return with some (but not all) | |
4526 | * of the lockowner state released; so don't release any until all | |
4527 | * have been checked. */ | |
4528 | status = nfs_ok; | |
0fa822e4 | 4529 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4530 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4531 | lo_list); | |
0fa822e4 N |
4532 | /* unhash_stateowner deletes so_perclient only |
4533 | * for openowners. */ | |
fe0750e5 BF |
4534 | list_del(&lo->lo_list); |
4535 | release_lockowner(lo); | |
1da177e4 LT |
4536 | } |
4537 | out: | |
4538 | nfs4_unlock_state(); | |
4539 | return status; | |
4540 | } | |
4541 | ||
4542 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4543 | alloc_reclaim(void) |
1da177e4 | 4544 | { |
a55370a3 | 4545 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4546 | } |
4547 | ||
0ce0c2b5 | 4548 | bool |
52e19c09 | 4549 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4550 | { |
0ce0c2b5 | 4551 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4552 | |
52e19c09 | 4553 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4554 | return (crp && crp->cr_clp); |
c7b9a459 N |
4555 | } |
4556 | ||
1da177e4 LT |
4557 | /* |
4558 | * failure => all reset bets are off, nfserr_no_grace... | |
4559 | */ | |
772a9bbb | 4560 | struct nfs4_client_reclaim * |
52e19c09 | 4561 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4562 | { |
4563 | unsigned int strhashval; | |
772a9bbb | 4564 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4565 | |
a55370a3 N |
4566 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4567 | crp = alloc_reclaim(); | |
772a9bbb JL |
4568 | if (crp) { |
4569 | strhashval = clientstr_hashval(name); | |
4570 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4571 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4572 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4573 | crp->cr_clp = NULL; |
52e19c09 | 4574 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4575 | } |
4576 | return crp; | |
1da177e4 LT |
4577 | } |
4578 | ||
ce30e539 | 4579 | void |
52e19c09 | 4580 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4581 | { |
4582 | list_del(&crp->cr_strhash); | |
4583 | kfree(crp); | |
52e19c09 | 4584 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4585 | } |
4586 | ||
2a4317c5 | 4587 | void |
52e19c09 | 4588 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4589 | { |
4590 | struct nfs4_client_reclaim *crp = NULL; | |
4591 | int i; | |
4592 | ||
1da177e4 | 4593 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4594 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4595 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4596 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4597 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4598 | } |
4599 | } | |
063b0fb9 | 4600 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4601 | } |
4602 | ||
4603 | /* | |
4604 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4605 | struct nfs4_client_reclaim * |
52e19c09 | 4606 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4607 | { |
4608 | unsigned int strhashval; | |
1da177e4 LT |
4609 | struct nfs4_client_reclaim *crp = NULL; |
4610 | ||
278c931c | 4611 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4612 | |
278c931c | 4613 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4614 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4615 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4616 | return crp; |
4617 | } | |
4618 | } | |
4619 | return NULL; | |
4620 | } | |
4621 | ||
4622 | /* | |
4623 | * Called from OPEN. Look for clientid in reclaim list. | |
4624 | */ | |
b37ad28b | 4625 | __be32 |
3320fef1 | 4626 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4627 | { |
a52d726b JL |
4628 | struct nfs4_client *clp; |
4629 | ||
4630 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4631 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4632 | if (clp == NULL) |
4633 | return nfserr_reclaim_bad; | |
4634 | ||
4635 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4636 | } |
4637 | ||
65178db4 BS |
4638 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4639 | ||
44e34da6 BS |
4640 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4641 | { | |
221a6876 BF |
4642 | if (mark_client_expired(clp)) |
4643 | return 0; | |
44e34da6 BS |
4644 | expire_client(clp); |
4645 | return 1; | |
4646 | } | |
4647 | ||
184c1847 BS |
4648 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4649 | { | |
4650 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4651 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4652 | printk(KERN_INFO "NFS Client: %s\n", buf); |
4653 | return 1; | |
4654 | } | |
4655 | ||
4656 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
4657 | const char *type) | |
4658 | { | |
4659 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4660 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4661 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
4662 | } | |
4663 | ||
fc29171f BS |
4664 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) |
4665 | { | |
4666 | struct nfs4_openowner *oop; | |
4667 | struct nfs4_lockowner *lop, *lo_next; | |
4668 | struct nfs4_ol_stateid *stp, *st_next; | |
4669 | u64 count = 0; | |
4670 | ||
4671 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
4672 | list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { | |
4673 | list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { | |
4674 | if (func) | |
4675 | func(lop); | |
4676 | if (++count == max) | |
4677 | return count; | |
4678 | } | |
4679 | } | |
4680 | } | |
4681 | ||
4682 | return count; | |
4683 | } | |
4684 | ||
4685 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
4686 | { | |
4687 | return nfsd_foreach_client_lock(clp, max, release_lockowner); | |
4688 | } | |
4689 | ||
184c1847 BS |
4690 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
4691 | { | |
4692 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
4693 | nfsd_print_count(clp, count, "locked files"); | |
4694 | return count; | |
4695 | } | |
4696 | ||
4dbdbda8 BS |
4697 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
4698 | { | |
4699 | struct nfs4_openowner *oop, *next; | |
4700 | u64 count = 0; | |
4701 | ||
4702 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
4703 | if (func) | |
4704 | func(oop); | |
4705 | if (++count == max) | |
4706 | break; | |
4707 | } | |
4708 | ||
4709 | return count; | |
4710 | } | |
4711 | ||
4712 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
4713 | { | |
4714 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
4715 | } | |
4716 | ||
184c1847 BS |
4717 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
4718 | { | |
4719 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
4720 | nfsd_print_count(clp, count, "open files"); | |
4721 | return count; | |
4722 | } | |
4723 | ||
269de30f BS |
4724 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
4725 | struct list_head *victims) | |
4726 | { | |
4727 | struct nfs4_delegation *dp, *next; | |
4728 | u64 count = 0; | |
4729 | ||
4730 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { | |
4731 | if (victims) | |
4732 | list_move(&dp->dl_recall_lru, victims); | |
4733 | if (++count == max) | |
4734 | break; | |
4735 | } | |
4736 | return count; | |
4737 | } | |
4738 | ||
4739 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
4740 | { | |
4741 | struct nfs4_delegation *dp, *next; | |
4742 | LIST_HEAD(victims); | |
4743 | u64 count; | |
4744 | ||
4745 | spin_lock(&recall_lock); | |
4746 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4747 | spin_unlock(&recall_lock); | |
4748 | ||
4749 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4750 | unhash_delegation(dp); | |
4751 | ||
4752 | return count; | |
4753 | } | |
4754 | ||
4755 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
4756 | { | |
4757 | struct nfs4_delegation *dp, *next; | |
4758 | LIST_HEAD(victims); | |
4759 | u64 count; | |
4760 | ||
4761 | spin_lock(&recall_lock); | |
4762 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4763 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4764 | nfsd_break_one_deleg(dp); | |
4765 | spin_unlock(&recall_lock); | |
4766 | ||
4767 | return count; | |
4768 | } | |
4769 | ||
184c1847 BS |
4770 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
4771 | { | |
4772 | u64 count = 0; | |
4773 | ||
4774 | spin_lock(&recall_lock); | |
4775 | count = nfsd_find_all_delegations(clp, max, NULL); | |
4776 | spin_unlock(&recall_lock); | |
4777 | ||
4778 | nfsd_print_count(clp, count, "delegations"); | |
4779 | return count; | |
4780 | } | |
4781 | ||
44e34da6 | 4782 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
4783 | { |
4784 | struct nfs4_client *clp, *next; | |
44e34da6 | 4785 | u64 count = 0; |
3320fef1 | 4786 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 4787 | |
44e34da6 BS |
4788 | if (!nfsd_netns_ready(nn)) |
4789 | return 0; | |
4790 | ||
5ed58bb2 | 4791 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
4792 | count += func(clp, max - count); |
4793 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
4794 | break; |
4795 | } | |
65178db4 | 4796 | |
44e34da6 BS |
4797 | return count; |
4798 | } | |
4799 | ||
6c1e82a4 BS |
4800 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
4801 | { | |
4802 | struct nfs4_client *clp; | |
4803 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
4804 | ||
4805 | if (!nfsd_netns_ready(nn)) | |
4806 | return NULL; | |
4807 | ||
4808 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
4809 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
4810 | return clp; | |
4811 | } | |
4812 | return NULL; | |
4813 | } | |
4814 | ||
65178db4 BS |
4815 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
4816 | ||
ac4d8ff2 | 4817 | /* initialization to perform at module load time: */ |
1da177e4 | 4818 | |
72083396 | 4819 | void |
ac4d8ff2 | 4820 | nfs4_state_init(void) |
1da177e4 | 4821 | { |
ac4d8ff2 N |
4822 | } |
4823 | ||
c2f1a551 MS |
4824 | /* |
4825 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4826 | * client may quite reasonably hang on to a delegation as long as it has | |
4827 | * the inode cached. This becomes an obvious problem the first time a | |
4828 | * client's inode cache approaches the size of the server's total memory. | |
4829 | * | |
4830 | * For now we avoid this problem by imposing a hard limit on the number | |
4831 | * of delegations, which varies according to the server's memory size. | |
4832 | */ | |
4833 | static void | |
4834 | set_max_delegations(void) | |
4835 | { | |
4836 | /* | |
4837 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4838 | * estimates suggest that in the worst case (where every delegation | |
4839 | * is for a different inode), a delegation could take about 1.5K, | |
4840 | * giving a worst case usage of about 6% of memory. | |
4841 | */ | |
4842 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4843 | } | |
4844 | ||
d85ed443 | 4845 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
4846 | { |
4847 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4848 | int i; | |
4849 | ||
4850 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
4851 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4852 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 4853 | goto err; |
0a7ec377 SK |
4854 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
4855 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4856 | if (!nn->unconf_id_hashtbl) | |
4857 | goto err_unconf_id; | |
9b531137 SK |
4858 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
4859 | OWNER_HASH_SIZE, GFP_KERNEL); | |
4860 | if (!nn->ownerstr_hashtbl) | |
4861 | goto err_ownerstr; | |
20e9e2bc SK |
4862 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
4863 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); | |
4864 | if (!nn->lockowner_ino_hashtbl) | |
4865 | goto err_lockowner_ino; | |
1872de0e SK |
4866 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
4867 | SESSION_HASH_SIZE, GFP_KERNEL); | |
4868 | if (!nn->sessionid_hashtbl) | |
4869 | goto err_sessionid; | |
8daae4dc | 4870 | |
382a62e7 | 4871 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 4872 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 4873 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 4874 | } |
9b531137 SK |
4875 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
4876 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
20e9e2bc SK |
4877 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4878 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); | |
1872de0e SK |
4879 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4880 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 4881 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 4882 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 4883 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 4884 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 4885 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 4886 | spin_lock_init(&nn->client_lock); |
8daae4dc | 4887 | |
09121281 | 4888 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 4889 | get_net(net); |
09121281 | 4890 | |
8daae4dc | 4891 | return 0; |
382a62e7 | 4892 | |
1872de0e SK |
4893 | err_sessionid: |
4894 | kfree(nn->lockowner_ino_hashtbl); | |
20e9e2bc SK |
4895 | err_lockowner_ino: |
4896 | kfree(nn->ownerstr_hashtbl); | |
9b531137 SK |
4897 | err_ownerstr: |
4898 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
4899 | err_unconf_id: |
4900 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
4901 | err: |
4902 | return -ENOMEM; | |
8daae4dc SK |
4903 | } |
4904 | ||
4905 | static void | |
4dce0ac9 | 4906 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
4907 | { |
4908 | int i; | |
4909 | struct nfs4_client *clp = NULL; | |
4910 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
a99454aa | 4911 | struct rb_node *node, *tmp; |
8daae4dc SK |
4912 | |
4913 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
4914 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
4915 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4916 | destroy_client(clp); | |
4917 | } | |
4918 | } | |
a99454aa SK |
4919 | |
4920 | node = rb_first(&nn->unconf_name_tree); | |
4921 | while (node != NULL) { | |
4922 | tmp = node; | |
4923 | node = rb_next(tmp); | |
4924 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
4925 | rb_erase(tmp, &nn->unconf_name_tree); | |
4926 | destroy_client(clp); | |
4927 | } | |
4928 | ||
1872de0e | 4929 | kfree(nn->sessionid_hashtbl); |
20e9e2bc | 4930 | kfree(nn->lockowner_ino_hashtbl); |
9b531137 | 4931 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 4932 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 4933 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 4934 | put_net(net); |
8daae4dc SK |
4935 | } |
4936 | ||
f252bc68 | 4937 | int |
d85ed443 | 4938 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 4939 | { |
5e1533c7 | 4940 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
4941 | int ret; |
4942 | ||
d85ed443 | 4943 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
4944 | if (ret) |
4945 | return ret; | |
5e1533c7 | 4946 | nfsd4_client_tracking_init(net); |
2c142baa | 4947 | nn->boot_time = get_seconds(); |
5ccb0066 | 4948 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 4949 | nn->grace_ended = false; |
d85ed443 | 4950 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
4951 | nn->nfsd4_grace, net); |
4952 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
4953 | return 0; |
4954 | } | |
4955 | ||
4956 | /* initialization to perform when the nfsd service is started: */ | |
4957 | ||
4958 | int | |
4959 | nfs4_state_start(void) | |
4960 | { | |
4961 | int ret; | |
4962 | ||
b5a1a81e | 4963 | ret = set_callback_cred(); |
d85ed443 SK |
4964 | if (ret) |
4965 | return -ENOMEM; | |
58da282b | 4966 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4967 | if (laundry_wq == NULL) { |
4968 | ret = -ENOMEM; | |
4969 | goto out_recovery; | |
4970 | } | |
b5a1a81e BF |
4971 | ret = nfsd4_create_callback_queue(); |
4972 | if (ret) | |
4973 | goto out_free_laundry; | |
09121281 | 4974 | |
c2f1a551 | 4975 | set_max_delegations(); |
d85ed443 | 4976 | |
b5a1a81e | 4977 | return 0; |
d85ed443 | 4978 | |
b5a1a81e BF |
4979 | out_free_laundry: |
4980 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4981 | out_recovery: |
b5a1a81e | 4982 | return ret; |
1da177e4 LT |
4983 | } |
4984 | ||
ac55fdc4 | 4985 | /* should be called with the state lock held */ |
f252bc68 | 4986 | void |
4dce0ac9 | 4987 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 4988 | { |
1da177e4 | 4989 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 4990 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 4991 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 4992 | |
4dce0ac9 SK |
4993 | cancel_delayed_work_sync(&nn->laundromat_work); |
4994 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 4995 | |
1da177e4 LT |
4996 | INIT_LIST_HEAD(&reaplist); |
4997 | spin_lock(&recall_lock); | |
e8c69d17 | 4998 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
4999 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
5000 | list_move(&dp->dl_recall_lru, &reaplist); | |
5001 | } | |
5002 | spin_unlock(&recall_lock); | |
5003 | list_for_each_safe(pos, next, &reaplist) { | |
5004 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
5005 | unhash_delegation(dp); |
5006 | } | |
5007 | ||
3320fef1 | 5008 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5009 | nfs4_state_destroy_net(net); |
1da177e4 LT |
5010 | } |
5011 | ||
5012 | void | |
5013 | nfs4_state_shutdown(void) | |
5014 | { | |
5e8d5c29 | 5015 | destroy_workqueue(laundry_wq); |
c3935e30 | 5016 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5017 | } |
8b70484c TM |
5018 | |
5019 | static void | |
5020 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5021 | { | |
37c593c5 TM |
5022 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5023 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5024 | } |
5025 | ||
5026 | static void | |
5027 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5028 | { | |
37c593c5 TM |
5029 | if (cstate->minorversion) { |
5030 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5031 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5032 | } | |
5033 | } | |
5034 | ||
5035 | void | |
5036 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5037 | { | |
5038 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5039 | } |
5040 | ||
62cd4a59 TM |
5041 | /* |
5042 | * functions to set current state id | |
5043 | */ | |
9428fe1a TM |
5044 | void |
5045 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5046 | { | |
5047 | put_stateid(cstate, &odp->od_stateid); | |
5048 | } | |
5049 | ||
8b70484c TM |
5050 | void |
5051 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5052 | { | |
5053 | put_stateid(cstate, &open->op_stateid); | |
5054 | } | |
5055 | ||
62cd4a59 TM |
5056 | void |
5057 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5058 | { | |
5059 | put_stateid(cstate, &close->cl_stateid); | |
5060 | } | |
5061 | ||
5062 | void | |
5063 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5064 | { | |
5065 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5066 | } | |
5067 | ||
5068 | /* | |
5069 | * functions to consume current state id | |
5070 | */ | |
1e97b519 | 5071 | |
9428fe1a TM |
5072 | void |
5073 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5074 | { | |
5075 | get_stateid(cstate, &odp->od_stateid); | |
5076 | } | |
5077 | ||
5078 | void | |
5079 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5080 | { | |
5081 | get_stateid(cstate, &drp->dr_stateid); | |
5082 | } | |
5083 | ||
1e97b519 TM |
5084 | void |
5085 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5086 | { | |
5087 | get_stateid(cstate, &fsp->fr_stateid); | |
5088 | } | |
5089 | ||
5090 | void | |
5091 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5092 | { | |
5093 | get_stateid(cstate, &setattr->sa_stateid); | |
5094 | } | |
5095 | ||
8b70484c TM |
5096 | void |
5097 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5098 | { | |
5099 | get_stateid(cstate, &close->cl_stateid); | |
5100 | } | |
5101 | ||
5102 | void | |
62cd4a59 | 5103 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5104 | { |
62cd4a59 | 5105 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5106 | } |
30813e27 TM |
5107 | |
5108 | void | |
5109 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5110 | { | |
5111 | get_stateid(cstate, &read->rd_stateid); | |
5112 | } | |
5113 | ||
5114 | void | |
5115 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5116 | { | |
5117 | get_stateid(cstate, &write->wr_stateid); | |
5118 | } |