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