]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 43 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 44 | #include "xdr4.h" |
0a3adade | 45 | #include "vfs.h" |
bfa4b365 | 46 | #include "current_stateid.h" |
99dbb8fe | 47 | #include "fault_inject.h" |
1da177e4 | 48 | |
5e1533c7 SK |
49 | #include "netns.h" |
50 | ||
1da177e4 LT |
51 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
52 | ||
53 | /* Globals */ | |
cf07d2ea | 54 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 55 | time_t nfsd4_grace = 90; |
f32f3c2d BF |
56 | |
57 | #define all_ones {{~0,~0},~0} | |
58 | static const stateid_t one_stateid = { | |
59 | .si_generation = ~0, | |
60 | .si_opaque = all_ones, | |
61 | }; | |
62 | static const stateid_t zero_stateid = { | |
63 | /* all fields zero */ | |
64 | }; | |
19ff0f28 TM |
65 | static const stateid_t currentstateid = { |
66 | .si_generation = 1, | |
67 | }; | |
f32f3c2d | 68 | |
ec6b5d7b | 69 | static u64 current_sessionid = 1; |
fd39ca9a | 70 | |
f32f3c2d BF |
71 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
72 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 73 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 74 | |
1da177e4 | 75 | /* forward declarations */ |
fe0750e5 | 76 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 77 | |
8b671b80 BF |
78 | /* Locking: */ |
79 | ||
80 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 81 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 82 | |
8b671b80 BF |
83 | /* |
84 | * Currently used for the del_recall_lru and file hash table. In an | |
85 | * effort to decrease the scope of the client_mutex, this spinlock may | |
86 | * eventually cover more: | |
87 | */ | |
88 | static DEFINE_SPINLOCK(recall_lock); | |
89 | ||
fe0750e5 BF |
90 | static struct kmem_cache *openowner_slab = NULL; |
91 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
92 | static struct kmem_cache *file_slab = NULL; |
93 | static struct kmem_cache *stateid_slab = NULL; | |
94 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 95 | |
1da177e4 LT |
96 | void |
97 | nfs4_lock_state(void) | |
98 | { | |
353ab6e9 | 99 | mutex_lock(&client_mutex); |
1da177e4 LT |
100 | } |
101 | ||
508dc6e1 BH |
102 | static void free_session(struct kref *); |
103 | ||
104 | /* Must be called under the client_lock */ | |
105 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
106 | { | |
107 | kref_put(&ses->se_ref, free_session); | |
108 | } | |
109 | ||
110 | static void nfsd4_get_session(struct nfsd4_session *ses) | |
111 | { | |
112 | kref_get(&ses->se_ref); | |
113 | } | |
114 | ||
1da177e4 LT |
115 | void |
116 | nfs4_unlock_state(void) | |
117 | { | |
353ab6e9 | 118 | mutex_unlock(&client_mutex); |
1da177e4 LT |
119 | } |
120 | ||
121 | static inline u32 | |
122 | opaque_hashval(const void *ptr, int nbytes) | |
123 | { | |
124 | unsigned char *cptr = (unsigned char *) ptr; | |
125 | ||
126 | u32 x = 0; | |
127 | while (nbytes--) { | |
128 | x *= 37; | |
129 | x += *cptr++; | |
130 | } | |
131 | return x; | |
132 | } | |
133 | ||
1da177e4 LT |
134 | static struct list_head del_recall_lru; |
135 | ||
32513b40 BF |
136 | static void nfsd4_free_file(struct nfs4_file *f) |
137 | { | |
138 | kmem_cache_free(file_slab, f); | |
139 | } | |
140 | ||
13cd2184 N |
141 | static inline void |
142 | put_nfs4_file(struct nfs4_file *fi) | |
143 | { | |
8b671b80 BF |
144 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
145 | list_del(&fi->fi_hash); | |
146 | spin_unlock(&recall_lock); | |
147 | iput(fi->fi_inode); | |
32513b40 | 148 | nfsd4_free_file(fi); |
8b671b80 | 149 | } |
13cd2184 N |
150 | } |
151 | ||
152 | static inline void | |
153 | get_nfs4_file(struct nfs4_file *fi) | |
154 | { | |
8b671b80 | 155 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
156 | } |
157 | ||
ef0f3390 | 158 | static int num_delegations; |
c2f1a551 | 159 | unsigned int max_delegations; |
ef0f3390 N |
160 | |
161 | /* | |
162 | * Open owner state (share locks) | |
163 | */ | |
164 | ||
16bfdaaf BF |
165 | /* hash tables for lock and open owners */ |
166 | #define OWNER_HASH_BITS 8 | |
167 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
168 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 169 | |
16bfdaaf | 170 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
171 | { |
172 | unsigned int ret; | |
173 | ||
174 | ret = opaque_hashval(ownername->data, ownername->len); | |
175 | ret += clientid; | |
16bfdaaf | 176 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 177 | } |
ef0f3390 | 178 | |
16bfdaaf | 179 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
ef0f3390 N |
180 | |
181 | /* hash table for nfs4_file */ | |
182 | #define FILE_HASH_BITS 8 | |
183 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 184 | |
ddc04c41 BF |
185 | static unsigned int file_hashval(struct inode *ino) |
186 | { | |
187 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
188 | return hash_ptr(ino, FILE_HASH_BITS); | |
189 | } | |
190 | ||
ef0f3390 | 191 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 192 | |
998db52c | 193 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
194 | { |
195 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
196 | atomic_inc(&fp->fi_access[oflag]); | |
197 | } | |
198 | ||
998db52c BF |
199 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
200 | { | |
201 | if (oflag == O_RDWR) { | |
202 | __nfs4_file_get_access(fp, O_RDONLY); | |
203 | __nfs4_file_get_access(fp, O_WRONLY); | |
204 | } else | |
205 | __nfs4_file_get_access(fp, oflag); | |
206 | } | |
207 | ||
208 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
209 | { |
210 | if (fp->fi_fds[oflag]) { | |
211 | fput(fp->fi_fds[oflag]); | |
212 | fp->fi_fds[oflag] = NULL; | |
213 | } | |
214 | } | |
215 | ||
998db52c | 216 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
217 | { |
218 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 219 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
220 | /* |
221 | * It's also safe to get rid of the RDWR open *if* | |
222 | * we no longer have need of the other kind of access | |
223 | * or if we already have the other kind of open: | |
224 | */ | |
225 | if (fp->fi_fds[1-oflag] | |
226 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
227 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
228 | } |
229 | } | |
230 | ||
998db52c BF |
231 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
232 | { | |
233 | if (oflag == O_RDWR) { | |
234 | __nfs4_file_put_access(fp, O_RDONLY); | |
235 | __nfs4_file_put_access(fp, O_WRONLY); | |
236 | } else | |
237 | __nfs4_file_put_access(fp, oflag); | |
238 | } | |
239 | ||
6136d2b4 | 240 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 241 | { |
6136d2b4 | 242 | static int min_stateid = 0; |
38c2f4b1 | 243 | struct idr *stateids = &stid->sc_client->cl_stateids; |
6136d2b4 BF |
244 | int new_stid; |
245 | int error; | |
246 | ||
38c2f4b1 | 247 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
6136d2b4 | 248 | /* |
996e0938 BF |
249 | * Note: the necessary preallocation was done in |
250 | * nfs4_alloc_stateid(). The idr code caps the number of | |
251 | * preallocations that can exist at a time, but the state lock | |
252 | * prevents anyone from using ours before we get here: | |
6136d2b4 BF |
253 | */ |
254 | BUG_ON(error); | |
255 | /* | |
256 | * It shouldn't be a problem to reuse an opaque stateid value. | |
257 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
258 | * example, a stray write retransmission could be accepted by | |
259 | * the server when it should have been rejected. Therefore, | |
260 | * adopt a trick from the sctp code to attempt to maximize the | |
261 | * amount of time until an id is reused, by ensuring they always | |
262 | * "increase" (mod INT_MAX): | |
263 | */ | |
36d44c60 | 264 | |
6136d2b4 BF |
265 | min_stateid = new_stid+1; |
266 | if (min_stateid == INT_MAX) | |
267 | min_stateid = 0; | |
268 | return new_stid; | |
36d44c60 BF |
269 | } |
270 | ||
996e0938 | 271 | static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
2a74aba7 BF |
272 | { |
273 | stateid_t *s = &stid->sc_stateid; | |
6136d2b4 | 274 | int new_id; |
2a74aba7 BF |
275 | |
276 | stid->sc_type = type; | |
277 | stid->sc_client = cl; | |
278 | s->si_opaque.so_clid = cl->cl_clientid; | |
6136d2b4 | 279 | new_id = get_new_stid(stid); |
6136d2b4 | 280 | s->si_opaque.so_id = (u32)new_id; |
2a74aba7 BF |
281 | /* Will be incremented before return to client: */ |
282 | s->si_generation = 0; | |
996e0938 BF |
283 | } |
284 | ||
285 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) | |
286 | { | |
287 | struct idr *stateids = &cl->cl_stateids; | |
288 | ||
289 | if (!idr_pre_get(stateids, GFP_KERNEL)) | |
290 | return NULL; | |
291 | /* | |
292 | * Note: if we fail here (or any time between now and the time | |
293 | * we actually get the new idr), we won't need to undo the idr | |
294 | * preallocation, since the idr code caps the number of | |
295 | * preallocated entries. | |
296 | */ | |
297 | return kmem_cache_alloc(slab, GFP_KERNEL); | |
2a74aba7 BF |
298 | } |
299 | ||
4cdc951b BF |
300 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
301 | { | |
302 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
303 | } | |
304 | ||
1da177e4 | 305 | static struct nfs4_delegation * |
dcef0413 | 306 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
307 | { |
308 | struct nfs4_delegation *dp; | |
309 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
310 | |
311 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
312 | /* |
313 | * Major work on the lease subsystem (for example, to support | |
314 | * calbacks on stat) will be required before we can support | |
315 | * write delegations properly. | |
316 | */ | |
317 | if (type != NFS4_OPEN_DELEGATE_READ) | |
318 | return NULL; | |
47f9940c MS |
319 | if (fp->fi_had_conflict) |
320 | return NULL; | |
c2f1a551 | 321 | if (num_delegations > max_delegations) |
ef0f3390 | 322 | return NULL; |
996e0938 | 323 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 324 | if (dp == NULL) |
1da177e4 | 325 | return dp; |
996e0938 | 326 | init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
2a74aba7 BF |
327 | /* |
328 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
329 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
330 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
331 | */ |
332 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 333 | num_delegations++; |
ea1da636 N |
334 | INIT_LIST_HEAD(&dp->dl_perfile); |
335 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 336 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 337 | get_nfs4_file(fp); |
1da177e4 | 338 | dp->dl_file = fp; |
1da177e4 | 339 | dp->dl_type = type; |
6c02eaa1 | 340 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
341 | dp->dl_time = 0; |
342 | atomic_set(&dp->dl_count, 1); | |
57725155 | 343 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
344 | return dp; |
345 | } | |
346 | ||
347 | void | |
348 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
349 | { | |
350 | if (atomic_dec_and_test(&dp->dl_count)) { | |
351 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 352 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 353 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 354 | num_delegations--; |
1da177e4 LT |
355 | } |
356 | } | |
357 | ||
acfdf5c3 | 358 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 359 | { |
acfdf5c3 BF |
360 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
361 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
362 | fp->fi_lease = NULL; | |
4ee63624 | 363 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
364 | fp->fi_deleg_file = NULL; |
365 | } | |
1da177e4 LT |
366 | } |
367 | ||
6136d2b4 BF |
368 | static void unhash_stid(struct nfs4_stid *s) |
369 | { | |
38c2f4b1 BF |
370 | struct idr *stateids = &s->sc_client->cl_stateids; |
371 | ||
372 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
6136d2b4 BF |
373 | } |
374 | ||
1da177e4 LT |
375 | /* Called under the state lock. */ |
376 | static void | |
377 | unhash_delegation(struct nfs4_delegation *dp) | |
378 | { | |
6136d2b4 | 379 | unhash_stid(&dp->dl_stid); |
ea1da636 | 380 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 381 | spin_lock(&recall_lock); |
5d926e8c | 382 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
383 | list_del_init(&dp->dl_recall_lru); |
384 | spin_unlock(&recall_lock); | |
acfdf5c3 | 385 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
386 | nfs4_put_delegation(dp); |
387 | } | |
388 | ||
389 | /* | |
390 | * SETCLIENTID state | |
391 | */ | |
392 | ||
36acb66b | 393 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
394 | static DEFINE_SPINLOCK(client_lock); |
395 | ||
ddc04c41 BF |
396 | static unsigned int clientid_hashval(u32 id) |
397 | { | |
398 | return id & CLIENT_HASH_MASK; | |
399 | } | |
400 | ||
401 | static unsigned int clientstr_hashval(const char *name) | |
402 | { | |
403 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
404 | } | |
405 | ||
1da177e4 | 406 | /* |
1da177e4 LT |
407 | * client_lru holds client queue ordered by nfs4_client.cl_time |
408 | * for lease renewal. | |
409 | * | |
410 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
411 | * for last close replay. | |
ac55fdc4 JL |
412 | * |
413 | * All of the above fields are protected by the client_mutex. | |
1da177e4 | 414 | */ |
1da177e4 LT |
415 | static struct list_head client_lru; |
416 | static struct list_head close_lru; | |
417 | ||
f9d7562f BF |
418 | /* |
419 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
420 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
421 | * only what share bits are currently in force, but also what | |
422 | * combinations of share bits previous opens have used. This allows us | |
423 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
424 | * return an error if the client attempt to downgrade to a combination | |
425 | * of share bits not explicable by closing some of its previous opens. | |
426 | * | |
427 | * XXX: This enforcement is actually incomplete, since we don't keep | |
428 | * track of access/deny bit combinations; so, e.g., we allow: | |
429 | * | |
430 | * OPEN allow read, deny write | |
431 | * OPEN allow both, deny none | |
432 | * DOWNGRADE allow read, deny none | |
433 | * | |
434 | * which we should reject. | |
435 | */ | |
5ae037e5 JL |
436 | static unsigned int |
437 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 438 | int i; |
5ae037e5 | 439 | unsigned int access = 0; |
f9d7562f | 440 | |
f9d7562f BF |
441 | for (i = 1; i < 4; i++) { |
442 | if (test_bit(i, &bmap)) | |
5ae037e5 | 443 | access |= i; |
f9d7562f | 444 | } |
5ae037e5 | 445 | return access; |
f9d7562f BF |
446 | } |
447 | ||
3a328614 | 448 | static bool |
dcef0413 | 449 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
450 | unsigned int access, deny; |
451 | ||
5ae037e5 JL |
452 | access = bmap_to_share_mode(stp->st_access_bmap); |
453 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 454 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
455 | return false; |
456 | return true; | |
f9d7562f BF |
457 | } |
458 | ||
82c5ff1b JL |
459 | /* set share access for a given stateid */ |
460 | static inline void | |
461 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
462 | { | |
463 | __set_bit(access, &stp->st_access_bmap); | |
464 | } | |
465 | ||
466 | /* clear share access for a given stateid */ | |
467 | static inline void | |
468 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
469 | { | |
470 | __clear_bit(access, &stp->st_access_bmap); | |
471 | } | |
472 | ||
473 | /* test whether a given stateid has access */ | |
474 | static inline bool | |
475 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
476 | { | |
477 | return test_bit(access, &stp->st_access_bmap); | |
478 | } | |
479 | ||
ce0fc43c JL |
480 | /* set share deny for a given stateid */ |
481 | static inline void | |
482 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
483 | { | |
484 | __set_bit(access, &stp->st_deny_bmap); | |
485 | } | |
486 | ||
487 | /* clear share deny for a given stateid */ | |
488 | static inline void | |
489 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
490 | { | |
491 | __clear_bit(access, &stp->st_deny_bmap); | |
492 | } | |
493 | ||
494 | /* test whether a given stateid is denying specific access */ | |
495 | static inline bool | |
496 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
497 | { | |
498 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
499 | } |
500 | ||
501 | static int nfs4_access_to_omode(u32 access) | |
502 | { | |
8f34a430 | 503 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
504 | case NFS4_SHARE_ACCESS_READ: |
505 | return O_RDONLY; | |
506 | case NFS4_SHARE_ACCESS_WRITE: | |
507 | return O_WRONLY; | |
508 | case NFS4_SHARE_ACCESS_BOTH: | |
509 | return O_RDWR; | |
510 | } | |
511 | BUG(); | |
512 | } | |
513 | ||
82c5ff1b JL |
514 | /* release all access and file references for a given stateid */ |
515 | static void | |
516 | release_all_access(struct nfs4_ol_stateid *stp) | |
517 | { | |
518 | int i; | |
519 | ||
520 | for (i = 1; i < 4; i++) { | |
521 | if (test_access(i, stp)) | |
522 | nfs4_file_put_access(stp->st_file, | |
523 | nfs4_access_to_omode(i)); | |
524 | clear_access(i, stp); | |
525 | } | |
526 | } | |
527 | ||
dcef0413 | 528 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 529 | { |
529d7b2a BF |
530 | list_del(&stp->st_perfile); |
531 | list_del(&stp->st_perstateowner); | |
532 | } | |
533 | ||
dcef0413 | 534 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 535 | { |
82c5ff1b | 536 | release_all_access(stp); |
a96e5b90 | 537 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
538 | stp->st_file = NULL; |
539 | } | |
540 | ||
dcef0413 | 541 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 542 | { |
529d7b2a BF |
543 | kmem_cache_free(stateid_slab, stp); |
544 | } | |
545 | ||
dcef0413 | 546 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
547 | { |
548 | struct file *file; | |
549 | ||
550 | unhash_generic_stateid(stp); | |
6136d2b4 | 551 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
552 | file = find_any_file(stp->st_file); |
553 | if (file) | |
fe0750e5 | 554 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 555 | close_generic_stateid(stp); |
529d7b2a BF |
556 | free_generic_stateid(stp); |
557 | } | |
558 | ||
fe0750e5 | 559 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 560 | { |
dcef0413 | 561 | struct nfs4_ol_stateid *stp; |
529d7b2a | 562 | |
fe0750e5 BF |
563 | list_del(&lo->lo_owner.so_strhash); |
564 | list_del(&lo->lo_perstateid); | |
009673b4 | 565 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
566 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
567 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 568 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
569 | release_lock_stateid(stp); |
570 | } | |
571 | } | |
572 | ||
fe0750e5 | 573 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 574 | { |
fe0750e5 BF |
575 | unhash_lockowner(lo); |
576 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
577 | } |
578 | ||
579 | static void | |
dcef0413 | 580 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 581 | { |
fe0750e5 | 582 | struct nfs4_lockowner *lo; |
529d7b2a BF |
583 | |
584 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
585 | lo = list_entry(open_stp->st_lockowners.next, |
586 | struct nfs4_lockowner, lo_perstateid); | |
587 | release_lockowner(lo); | |
529d7b2a BF |
588 | } |
589 | } | |
590 | ||
38c387b5 | 591 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
592 | { |
593 | unhash_generic_stateid(stp); | |
594 | release_stateid_lockowners(stp); | |
38c387b5 BF |
595 | close_generic_stateid(stp); |
596 | } | |
597 | ||
598 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
599 | { | |
600 | unhash_open_stateid(stp); | |
6136d2b4 | 601 | unhash_stid(&stp->st_stid); |
2283963f BF |
602 | free_generic_stateid(stp); |
603 | } | |
604 | ||
fe0750e5 | 605 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 606 | { |
dcef0413 | 607 | struct nfs4_ol_stateid *stp; |
f1d110ca | 608 | |
fe0750e5 BF |
609 | list_del(&oo->oo_owner.so_strhash); |
610 | list_del(&oo->oo_perclient); | |
611 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
612 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 613 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 614 | release_open_stateid(stp); |
f1d110ca BF |
615 | } |
616 | } | |
617 | ||
f7a4d872 BF |
618 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
619 | { | |
620 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
621 | ||
622 | if (s) { | |
6136d2b4 | 623 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
624 | free_generic_stateid(s); |
625 | oo->oo_last_closed_stid = NULL; | |
626 | } | |
627 | } | |
628 | ||
fe0750e5 | 629 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 630 | { |
fe0750e5 BF |
631 | unhash_openowner(oo); |
632 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 633 | release_last_closed_stateid(oo); |
fe0750e5 | 634 | nfs4_free_openowner(oo); |
f1d110ca BF |
635 | } |
636 | ||
5282fd72 ME |
637 | #define SESSION_HASH_SIZE 512 |
638 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
639 | ||
640 | static inline int | |
641 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
642 | { | |
643 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
644 | ||
645 | return sid->sequence % SESSION_HASH_SIZE; | |
646 | } | |
647 | ||
8f199b82 | 648 | #ifdef NFSD_DEBUG |
5282fd72 ME |
649 | static inline void |
650 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
651 | { | |
652 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
653 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
654 | } | |
8f199b82 TM |
655 | #else |
656 | static inline void | |
657 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
658 | { | |
659 | } | |
660 | #endif | |
661 | ||
5282fd72 | 662 | |
ec6b5d7b AA |
663 | static void |
664 | gen_sessionid(struct nfsd4_session *ses) | |
665 | { | |
666 | struct nfs4_client *clp = ses->se_client; | |
667 | struct nfsd4_sessionid *sid; | |
668 | ||
669 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
670 | sid->clientid = clp->cl_clientid; | |
671 | sid->sequence = current_sessionid++; | |
672 | sid->reserved = 0; | |
673 | } | |
674 | ||
675 | /* | |
a649637c AA |
676 | * The protocol defines ca_maxresponssize_cached to include the size of |
677 | * the rpc header, but all we need to cache is the data starting after | |
678 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
679 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
680 | * value that is the number of bytes in our cache plus a few additional | |
681 | * bytes. In order to stay on the safe side, and not promise more than | |
682 | * we can cache, those additional bytes must be the minimum possible: 24 | |
683 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
684 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
685 | * for the SEQUENCE op response: | |
686 | */ | |
687 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
688 | ||
557ce264 AA |
689 | static void |
690 | free_session_slots(struct nfsd4_session *ses) | |
691 | { | |
692 | int i; | |
693 | ||
694 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
695 | kfree(ses->se_slots[i]); | |
696 | } | |
697 | ||
a649637c | 698 | /* |
efe0cb6d BF |
699 | * We don't actually need to cache the rpc and session headers, so we |
700 | * can allocate a little less for each slot: | |
701 | */ | |
702 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
703 | { | |
704 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
705 | } | |
706 | ||
5b6feee9 | 707 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 708 | { |
5b6feee9 BF |
709 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
710 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 711 | |
5b6feee9 BF |
712 | return size; |
713 | } | |
ec6b5d7b | 714 | |
5b6feee9 BF |
715 | /* |
716 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 717 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 718 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 719 | */ |
5b6feee9 | 720 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 721 | { |
5b6feee9 | 722 | int avail; |
ec6b5d7b | 723 | |
5b6feee9 | 724 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 725 | |
5b6feee9 BF |
726 | spin_lock(&nfsd_drc_lock); |
727 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
728 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
729 | num = min_t(int, num, avail / slotsize); | |
730 | nfsd_drc_mem_used += num * slotsize; | |
731 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 732 | |
5b6feee9 BF |
733 | return num; |
734 | } | |
ec6b5d7b | 735 | |
5b6feee9 BF |
736 | static void nfsd4_put_drc_mem(int slotsize, int num) |
737 | { | |
4bd9b0f4 | 738 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 739 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 740 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 741 | } |
ec6b5d7b | 742 | |
a827bcb2 | 743 | static struct nfsd4_session *__alloc_session(int slotsize, int numslots) |
5b6feee9 BF |
744 | { |
745 | struct nfsd4_session *new; | |
746 | int mem, i; | |
a649637c | 747 | |
5b6feee9 BF |
748 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
749 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
750 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 751 | |
5b6feee9 BF |
752 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
753 | if (!new) | |
754 | return NULL; | |
557ce264 | 755 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
756 | for (i = 0; i < numslots; i++) { |
757 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
758 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
759 | if (!new->se_slots[i]) | |
557ce264 | 760 | goto out_free; |
557ce264 | 761 | } |
5b6feee9 BF |
762 | return new; |
763 | out_free: | |
764 | while (i--) | |
765 | kfree(new->se_slots[i]); | |
766 | kfree(new); | |
767 | return NULL; | |
ec6b5d7b AA |
768 | } |
769 | ||
5b6feee9 | 770 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 771 | { |
5b6feee9 | 772 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 773 | |
5b6feee9 | 774 | new->maxreqs = numslots; |
d2b21743 MJ |
775 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
776 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
777 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
778 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
779 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
780 | } | |
ec6b5d7b | 781 | |
19cf5c02 BF |
782 | static void free_conn(struct nfsd4_conn *c) |
783 | { | |
784 | svc_xprt_put(c->cn_xprt); | |
785 | kfree(c); | |
786 | } | |
ec6b5d7b | 787 | |
19cf5c02 BF |
788 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
789 | { | |
790 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
791 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 792 | |
19cf5c02 BF |
793 | spin_lock(&clp->cl_lock); |
794 | if (!list_empty(&c->cn_persession)) { | |
795 | list_del(&c->cn_persession); | |
796 | free_conn(c); | |
797 | } | |
798 | spin_unlock(&clp->cl_lock); | |
eea49806 | 799 | nfsd4_probe_callback(clp); |
19cf5c02 | 800 | } |
ec6b5d7b | 801 | |
d29c374c | 802 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 803 | { |
c7662518 | 804 | struct nfsd4_conn *conn; |
ec6b5d7b | 805 | |
c7662518 BF |
806 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
807 | if (!conn) | |
db90681d | 808 | return NULL; |
c7662518 BF |
809 | svc_xprt_get(rqstp->rq_xprt); |
810 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 811 | conn->cn_flags = flags; |
db90681d BF |
812 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
813 | return conn; | |
814 | } | |
a649637c | 815 | |
328ead28 BF |
816 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
817 | { | |
818 | conn->cn_session = ses; | |
819 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
820 | } |
821 | ||
db90681d | 822 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 823 | { |
db90681d | 824 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 825 | |
c7662518 | 826 | spin_lock(&clp->cl_lock); |
328ead28 | 827 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 828 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
829 | } |
830 | ||
21b75b01 | 831 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 832 | { |
19cf5c02 | 833 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 834 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
835 | } |
836 | ||
e1ff371f | 837 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 838 | { |
21b75b01 | 839 | int ret; |
ec6b5d7b | 840 | |
db90681d | 841 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
842 | ret = nfsd4_register_conn(conn); |
843 | if (ret) | |
844 | /* oops; xprt is already down: */ | |
845 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 846 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
847 | /* callback channel may be back up */ |
848 | nfsd4_probe_callback(ses->se_client); | |
849 | } | |
c7662518 | 850 | } |
ec6b5d7b | 851 | |
e1ff371f | 852 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
853 | { |
854 | u32 dir = NFS4_CDFC4_FORE; | |
855 | ||
e1ff371f | 856 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 857 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 858 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
859 | } |
860 | ||
861 | /* must be called under client_lock */ | |
19cf5c02 | 862 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 863 | { |
19cf5c02 BF |
864 | struct nfs4_client *clp = s->se_client; |
865 | struct nfsd4_conn *c; | |
ec6b5d7b | 866 | |
19cf5c02 BF |
867 | spin_lock(&clp->cl_lock); |
868 | while (!list_empty(&s->se_conns)) { | |
869 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
870 | list_del_init(&c->cn_persession); | |
871 | spin_unlock(&clp->cl_lock); | |
557ce264 | 872 | |
19cf5c02 BF |
873 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
874 | free_conn(c); | |
ec6b5d7b | 875 | |
19cf5c02 BF |
876 | spin_lock(&clp->cl_lock); |
877 | } | |
878 | spin_unlock(&clp->cl_lock); | |
c7662518 | 879 | } |
ec6b5d7b | 880 | |
1377b69e BF |
881 | static void __free_session(struct nfsd4_session *ses) |
882 | { | |
883 | nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); | |
884 | free_session_slots(ses); | |
885 | kfree(ses); | |
886 | } | |
887 | ||
508dc6e1 | 888 | static void free_session(struct kref *kref) |
c7662518 BF |
889 | { |
890 | struct nfsd4_session *ses; | |
c7662518 | 891 | |
bc2df47a | 892 | lockdep_assert_held(&client_lock); |
c7662518 | 893 | ses = container_of(kref, struct nfsd4_session, se_ref); |
19cf5c02 | 894 | nfsd4_del_conns(ses); |
1377b69e | 895 | __free_session(ses); |
c7662518 BF |
896 | } |
897 | ||
508dc6e1 BH |
898 | void nfsd4_put_session(struct nfsd4_session *ses) |
899 | { | |
900 | spin_lock(&client_lock); | |
901 | nfsd4_put_session_locked(ses); | |
902 | spin_unlock(&client_lock); | |
903 | } | |
904 | ||
a827bcb2 | 905 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan) |
5b6feee9 BF |
906 | { |
907 | struct nfsd4_session *new; | |
5b6feee9 | 908 | int numslots, slotsize; |
5b6feee9 BF |
909 | /* |
910 | * Note decreasing slot size below client's request may | |
911 | * make it difficult for client to function correctly, whereas | |
912 | * decreasing the number of slots will (just?) affect | |
913 | * performance. When short on memory we therefore prefer to | |
914 | * decrease number of slots instead of their size. | |
915 | */ | |
916 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
917 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
918 | if (numslots < 1) |
919 | return NULL; | |
5b6feee9 | 920 | |
a827bcb2 | 921 | new = __alloc_session(slotsize, numslots); |
5b6feee9 BF |
922 | if (!new) { |
923 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 924 | return NULL; |
557ce264 | 925 | } |
5b6feee9 | 926 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
a827bcb2 BF |
927 | return new; |
928 | } | |
557ce264 | 929 | |
135ae827 | 930 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 931 | { |
a827bcb2 BF |
932 | int idx; |
933 | ||
ec6b5d7b AA |
934 | new->se_client = clp; |
935 | gen_sessionid(new); | |
ec6b5d7b | 936 | |
c7662518 BF |
937 | INIT_LIST_HEAD(&new->se_conns); |
938 | ||
ac7c46f2 | 939 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 940 | new->se_flags = cses->flags; |
8b5ce5cd | 941 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 942 | new->se_cb_sec = cses->cb_sec; |
ec6b5d7b | 943 | kref_init(&new->se_ref); |
5b6feee9 | 944 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 945 | spin_lock(&client_lock); |
ec6b5d7b | 946 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 947 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 948 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 949 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 950 | spin_unlock(&client_lock); |
ec6b5d7b | 951 | |
dcbeaa68 | 952 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 953 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
954 | /* |
955 | * This is a little silly; with sessions there's no real | |
956 | * use for the callback address. Use the peer address | |
957 | * as a reasonable default for now, but consider fixing | |
958 | * the rpc client not to require an address in the | |
959 | * future: | |
960 | */ | |
edd76786 BF |
961 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
962 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 963 | } |
ec6b5d7b AA |
964 | } |
965 | ||
9089f1b4 | 966 | /* caller must hold client_lock */ |
5282fd72 ME |
967 | static struct nfsd4_session * |
968 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
969 | { | |
970 | struct nfsd4_session *elem; | |
971 | int idx; | |
972 | ||
973 | dump_sessionid(__func__, sessionid); | |
974 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
975 | /* Search in the appropriate list */ |
976 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
977 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
978 | NFS4_MAX_SESSIONID_LEN)) { | |
979 | return elem; | |
980 | } | |
981 | } | |
982 | ||
983 | dprintk("%s: session not found\n", __func__); | |
984 | return NULL; | |
985 | } | |
986 | ||
9089f1b4 | 987 | /* caller must hold client_lock */ |
7116ed6b | 988 | static void |
5282fd72 | 989 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
990 | { |
991 | list_del(&ses->se_hash); | |
4c649378 | 992 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 993 | list_del(&ses->se_perclnt); |
4c649378 | 994 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
995 | } |
996 | ||
36acb66b | 997 | /* must be called under the client_lock */ |
1da177e4 | 998 | static inline void |
36acb66b | 999 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 1000 | { |
07cd4909 | 1001 | if (is_client_expired(clp)) { |
7447758b BF |
1002 | WARN_ON(1); |
1003 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
07cd4909 BH |
1004 | __func__, |
1005 | clp->cl_clientid.cl_boot, | |
1006 | clp->cl_clientid.cl_id); | |
1007 | return; | |
1008 | } | |
1009 | ||
1da177e4 LT |
1010 | dprintk("renewing client (clientid %08x/%08x)\n", |
1011 | clp->cl_clientid.cl_boot, | |
1012 | clp->cl_clientid.cl_id); | |
1013 | list_move_tail(&clp->cl_lru, &client_lru); | |
1014 | clp->cl_time = get_seconds(); | |
1015 | } | |
1016 | ||
36acb66b BH |
1017 | static inline void |
1018 | renew_client(struct nfs4_client *clp) | |
1019 | { | |
1020 | spin_lock(&client_lock); | |
1021 | renew_client_locked(clp); | |
1022 | spin_unlock(&client_lock); | |
1023 | } | |
1024 | ||
1da177e4 LT |
1025 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1026 | static int | |
2c142baa | 1027 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1028 | { |
2c142baa | 1029 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1030 | return 0; |
60adfc50 | 1031 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1032 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1033 | return 1; |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * XXX Should we use a slab cache ? | |
1038 | * This type of memory management is somewhat inefficient, but we use it | |
1039 | * anyway since SETCLIENTID is not a common operation. | |
1040 | */ | |
35bba9a3 | 1041 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1042 | { |
1043 | struct nfs4_client *clp; | |
1044 | ||
35bba9a3 BF |
1045 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1046 | if (clp == NULL) | |
1047 | return NULL; | |
67114fe6 | 1048 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1049 | if (clp->cl_name.data == NULL) { |
1050 | kfree(clp); | |
1051 | return NULL; | |
1da177e4 | 1052 | } |
35bba9a3 | 1053 | clp->cl_name.len = name.len; |
1da177e4 LT |
1054 | return clp; |
1055 | } | |
1056 | ||
1057 | static inline void | |
1058 | free_client(struct nfs4_client *clp) | |
1059 | { | |
bc2df47a | 1060 | lockdep_assert_held(&client_lock); |
792c95dd BF |
1061 | while (!list_empty(&clp->cl_sessions)) { |
1062 | struct nfsd4_session *ses; | |
1063 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1064 | se_perclnt); | |
1065 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1066 | nfsd4_put_session_locked(ses); |
792c95dd | 1067 | } |
03a4e1f6 | 1068 | free_svc_cred(&clp->cl_cred); |
1da177e4 LT |
1069 | kfree(clp->cl_name.data); |
1070 | kfree(clp); | |
1071 | } | |
1072 | ||
d7682988 BH |
1073 | void |
1074 | release_session_client(struct nfsd4_session *session) | |
1075 | { | |
1076 | struct nfs4_client *clp = session->se_client; | |
1077 | ||
1078 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1079 | return; | |
1080 | if (is_client_expired(clp)) { | |
1081 | free_client(clp); | |
1082 | session->se_client = NULL; | |
1083 | } else | |
1084 | renew_client_locked(clp); | |
1085 | spin_unlock(&client_lock); | |
d7682988 BH |
1086 | } |
1087 | ||
84d38ac9 BH |
1088 | /* must be called under the client_lock */ |
1089 | static inline void | |
1090 | unhash_client_locked(struct nfs4_client *clp) | |
1091 | { | |
792c95dd BF |
1092 | struct nfsd4_session *ses; |
1093 | ||
07cd4909 | 1094 | mark_client_expired(clp); |
84d38ac9 | 1095 | list_del(&clp->cl_lru); |
4c649378 | 1096 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1097 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1098 | list_del_init(&ses->se_hash); | |
4c649378 | 1099 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1100 | } |
1101 | ||
1da177e4 | 1102 | static void |
0d22f68f | 1103 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1104 | { |
fe0750e5 | 1105 | struct nfs4_openowner *oo; |
1da177e4 | 1106 | struct nfs4_delegation *dp; |
1da177e4 | 1107 | struct list_head reaplist; |
382a62e7 | 1108 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1109 | |
1da177e4 LT |
1110 | INIT_LIST_HEAD(&reaplist); |
1111 | spin_lock(&recall_lock); | |
ea1da636 N |
1112 | while (!list_empty(&clp->cl_delegations)) { |
1113 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1114 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1115 | list_move(&dp->dl_recall_lru, &reaplist); |
1116 | } | |
1117 | spin_unlock(&recall_lock); | |
1118 | while (!list_empty(&reaplist)) { | |
1119 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1120 | unhash_delegation(dp); |
1121 | } | |
ea1da636 | 1122 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1123 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1124 | release_openowner(oo); | |
1da177e4 | 1125 | } |
6ff8da08 | 1126 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1127 | if (clp->cl_cb_conn.cb_xprt) |
1128 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1129 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1130 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1131 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1132 | else |
a99454aa | 1133 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
be1fdf6c | 1134 | spin_lock(&client_lock); |
84d38ac9 | 1135 | unhash_client_locked(clp); |
46583e25 BH |
1136 | if (atomic_read(&clp->cl_refcount) == 0) |
1137 | free_client(clp); | |
be1fdf6c | 1138 | spin_unlock(&client_lock); |
1da177e4 LT |
1139 | } |
1140 | ||
0d22f68f BF |
1141 | static void expire_client(struct nfs4_client *clp) |
1142 | { | |
1143 | nfsd4_client_record_remove(clp); | |
1144 | destroy_client(clp); | |
1145 | } | |
1146 | ||
35bba9a3 BF |
1147 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1148 | { | |
1149 | memcpy(target->cl_verifier.data, source->data, | |
1150 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1151 | } |
1152 | ||
35bba9a3 BF |
1153 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1154 | { | |
1da177e4 LT |
1155 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1156 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1157 | } | |
1158 | ||
03a4e1f6 | 1159 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1160 | { |
03a4e1f6 BF |
1161 | if (source->cr_principal) { |
1162 | target->cr_principal = | |
1163 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1164 | if (target->cr_principal == NULL) | |
1165 | return -ENOMEM; | |
1166 | } else | |
1167 | target->cr_principal = NULL; | |
d5497fc6 | 1168 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1169 | target->cr_uid = source->cr_uid; |
1170 | target->cr_gid = source->cr_gid; | |
1171 | target->cr_group_info = source->cr_group_info; | |
1172 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1173 | return 0; |
1da177e4 LT |
1174 | } |
1175 | ||
ac55fdc4 JL |
1176 | static long long |
1177 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1178 | { | |
1179 | long long res; | |
1180 | ||
1181 | res = o1->len - o2->len; | |
1182 | if (res) | |
1183 | return res; | |
1184 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1185 | } | |
1186 | ||
35bba9a3 | 1187 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1188 | { |
a55370a3 | 1189 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1190 | } |
1191 | ||
1192 | static int | |
599e0a22 BF |
1193 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1194 | { | |
1195 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1196 | } |
1197 | ||
1198 | static int | |
599e0a22 BF |
1199 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1200 | { | |
1201 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1202 | } |
1203 | ||
8fbba96e BF |
1204 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1205 | { | |
1206 | int i; | |
1207 | ||
1208 | if (g1->ngroups != g2->ngroups) | |
1209 | return false; | |
1210 | for (i=0; i<g1->ngroups; i++) | |
1211 | if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) | |
1212 | return false; | |
1213 | return true; | |
1214 | } | |
1215 | ||
68eb3508 BF |
1216 | /* |
1217 | * RFC 3530 language requires clid_inuse be returned when the | |
1218 | * "principal" associated with a requests differs from that previously | |
1219 | * used. We use uid, gid's, and gss principal string as our best | |
1220 | * approximation. We also don't want to allow non-gss use of a client | |
1221 | * established using gss: in theory cr_principal should catch that | |
1222 | * change, but in practice cr_principal can be null even in the gss case | |
1223 | * since gssd doesn't always pass down a principal string. | |
1224 | */ | |
1225 | static bool is_gss_cred(struct svc_cred *cr) | |
1226 | { | |
1227 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1228 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1229 | } | |
1230 | ||
1231 | ||
5559b50a | 1232 | static bool |
599e0a22 BF |
1233 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1234 | { | |
68eb3508 | 1235 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
d5497fc6 | 1236 | || (cr1->cr_uid != cr2->cr_uid) |
8fbba96e BF |
1237 | || (cr1->cr_gid != cr2->cr_gid) |
1238 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) | |
1239 | return false; | |
1240 | if (cr1->cr_principal == cr2->cr_principal) | |
1241 | return true; | |
1242 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1243 | return false; | |
5559b50a | 1244 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1245 | } |
1246 | ||
c212cecf | 1247 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1248 | { |
1249 | static u32 current_clientid = 1; | |
1250 | ||
2c142baa | 1251 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1252 | clp->cl_clientid.cl_id = current_clientid++; |
1253 | } | |
1254 | ||
deda2faa BF |
1255 | static void gen_confirm(struct nfs4_client *clp) |
1256 | { | |
ab4684d1 | 1257 | __be32 verf[2]; |
deda2faa | 1258 | static u32 i; |
1da177e4 | 1259 | |
ab4684d1 CL |
1260 | verf[0] = (__be32)get_seconds(); |
1261 | verf[1] = (__be32)i++; | |
1262 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1263 | } |
1264 | ||
38c2f4b1 | 1265 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1266 | { |
38c2f4b1 | 1267 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1268 | } |
1269 | ||
38c2f4b1 | 1270 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1271 | { |
1272 | struct nfs4_stid *s; | |
4d71ab87 | 1273 | |
38c2f4b1 | 1274 | s = find_stateid(cl, t); |
4d71ab87 BF |
1275 | if (!s) |
1276 | return NULL; | |
f459e453 | 1277 | if (typemask & s->sc_type) |
4581d140 | 1278 | return s; |
4581d140 BF |
1279 | return NULL; |
1280 | } | |
1281 | ||
2216d449 | 1282 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1283 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1284 | { | |
1285 | struct nfs4_client *clp; | |
1286 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1287 | int ret; |
c212cecf | 1288 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
1289 | |
1290 | clp = alloc_client(name); | |
1291 | if (clp == NULL) | |
1292 | return NULL; | |
1293 | ||
792c95dd | 1294 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1295 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1296 | if (ret) { | |
1297 | spin_lock(&client_lock); | |
1298 | free_client(clp); | |
1299 | spin_unlock(&client_lock); | |
1300 | return NULL; | |
b09333c4 | 1301 | } |
38c2f4b1 | 1302 | idr_init(&clp->cl_stateids); |
46583e25 | 1303 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1304 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1305 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1306 | INIT_LIST_HEAD(&clp->cl_openowners); |
1307 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1308 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1309 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1310 | spin_lock_init(&clp->cl_lock); |
57725155 | 1311 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1312 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1313 | clear_bit(0, &clp->cl_cb_slot_busy); |
1314 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1315 | copy_verf(clp, verf); | |
1316 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1317 | gen_confirm(clp); |
edd76786 | 1318 | clp->cl_cb_session = NULL; |
c212cecf | 1319 | clp->net = net; |
b09333c4 RL |
1320 | return clp; |
1321 | } | |
1322 | ||
fd39ca9a | 1323 | static void |
ac55fdc4 JL |
1324 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1325 | { | |
1326 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1327 | struct nfs4_client *clp; | |
1328 | ||
1329 | while (*new) { | |
1330 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1331 | parent = *new; | |
1332 | ||
1333 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1334 | new = &((*new)->rb_left); | |
1335 | else | |
1336 | new = &((*new)->rb_right); | |
1337 | } | |
1338 | ||
1339 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1340 | rb_insert_color(&new_clp->cl_namenode, root); | |
1341 | } | |
1342 | ||
1343 | static struct nfs4_client * | |
1344 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1345 | { | |
1346 | long long cmp; | |
1347 | struct rb_node *node = root->rb_node; | |
1348 | struct nfs4_client *clp; | |
1349 | ||
1350 | while (node) { | |
1351 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1352 | cmp = compare_blob(&clp->cl_name, name); | |
1353 | if (cmp > 0) | |
1354 | node = node->rb_left; | |
1355 | else if (cmp < 0) | |
1356 | node = node->rb_right; | |
1357 | else | |
1358 | return clp; | |
1359 | } | |
1360 | return NULL; | |
1361 | } | |
1362 | ||
1363 | static void | |
1364 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1365 | { |
1366 | unsigned int idhashval; | |
0a7ec377 | 1367 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1368 | |
ac55fdc4 | 1369 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1370 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1371 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1372 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1373 | renew_client(clp); |
1da177e4 LT |
1374 | } |
1375 | ||
fd39ca9a | 1376 | static void |
1da177e4 LT |
1377 | move_to_confirmed(struct nfs4_client *clp) |
1378 | { | |
1379 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1380 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1381 | |
1382 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1383 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1384 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1385 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1386 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1387 | renew_client(clp); |
1388 | } | |
1389 | ||
1390 | static struct nfs4_client * | |
8daae4dc | 1391 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 LT |
1392 | { |
1393 | struct nfs4_client *clp; | |
1394 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1395 | ||
8daae4dc | 1396 | list_for_each_entry(clp, &nn->conf_id_hashtbl[idhashval], cl_idhash) { |
a50d2ad1 | 1397 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1398 | if ((bool)clp->cl_minorversion != sessions) |
1399 | return NULL; | |
a50d2ad1 | 1400 | renew_client(clp); |
1da177e4 | 1401 | return clp; |
a50d2ad1 | 1402 | } |
1da177e4 LT |
1403 | } |
1404 | return NULL; | |
1405 | } | |
1406 | ||
1407 | static struct nfs4_client * | |
0a7ec377 | 1408 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 LT |
1409 | { |
1410 | struct nfs4_client *clp; | |
1411 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1412 | ||
0a7ec377 | 1413 | list_for_each_entry(clp, &nn->unconf_id_hashtbl[idhashval], cl_idhash) { |
d15c077e BF |
1414 | if (same_clid(&clp->cl_clientid, clid)) { |
1415 | if ((bool)clp->cl_minorversion != sessions) | |
1416 | return NULL; | |
1da177e4 | 1417 | return clp; |
d15c077e | 1418 | } |
1da177e4 LT |
1419 | } |
1420 | return NULL; | |
1421 | } | |
1422 | ||
6e5f15c9 | 1423 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1424 | { |
6e5f15c9 | 1425 | return clp->cl_exchange_flags != 0; |
e203d506 | 1426 | } |
a1bcecd2 | 1427 | |
28ce6054 | 1428 | static struct nfs4_client * |
382a62e7 | 1429 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1430 | { |
382a62e7 | 1431 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1432 | } |
1433 | ||
1434 | static struct nfs4_client * | |
a99454aa | 1435 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1436 | { |
a99454aa | 1437 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1438 | } |
1439 | ||
fd39ca9a | 1440 | static void |
6f3d772f | 1441 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1442 | { |
07263f1e | 1443 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1444 | struct sockaddr *sa = svc_addr(rqstp); |
1445 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1446 | unsigned short expected_family; |
1447 | ||
1448 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1449 | if (se->se_callback_netid_len == 3 && | |
1450 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1451 | expected_family = AF_INET; | |
1452 | else if (se->se_callback_netid_len == 4 && | |
1453 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1454 | expected_family = AF_INET6; | |
1455 | else | |
1da177e4 LT |
1456 | goto out_err; |
1457 | ||
c212cecf | 1458 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1459 | se->se_callback_addr_len, |
07263f1e BF |
1460 | (struct sockaddr *)&conn->cb_addr, |
1461 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1462 | |
07263f1e | 1463 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1464 | goto out_err; |
aa9a4ec7 | 1465 | |
07263f1e BF |
1466 | if (conn->cb_addr.ss_family == AF_INET6) |
1467 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1468 | |
07263f1e BF |
1469 | conn->cb_prog = se->se_callback_prog; |
1470 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1471 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1472 | return; |
1473 | out_err: | |
07263f1e BF |
1474 | conn->cb_addr.ss_family = AF_UNSPEC; |
1475 | conn->cb_addrlen = 0; | |
849823c5 | 1476 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1477 | "will not receive delegations\n", |
1478 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1479 | ||
1da177e4 LT |
1480 | return; |
1481 | } | |
1482 | ||
074fe897 | 1483 | /* |
557ce264 | 1484 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1485 | */ |
074fe897 AA |
1486 | void |
1487 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1488 | { |
557ce264 AA |
1489 | struct nfsd4_slot *slot = resp->cstate.slot; |
1490 | unsigned int base; | |
074fe897 | 1491 | |
557ce264 | 1492 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1493 | |
557ce264 AA |
1494 | slot->sl_opcnt = resp->opcnt; |
1495 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1496 | |
bf5c43c8 | 1497 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1498 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1499 | slot->sl_datalen = 0; |
bf864a31 | 1500 | return; |
074fe897 | 1501 | } |
557ce264 AA |
1502 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1503 | base = (char *)resp->cstate.datap - | |
1504 | (char *)resp->xbuf->head[0].iov_base; | |
1505 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1506 | slot->sl_datalen)) | |
1507 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1508 | return; | |
074fe897 AA |
1509 | } |
1510 | ||
1511 | /* | |
abfabf8c AA |
1512 | * Encode the replay sequence operation from the slot values. |
1513 | * If cachethis is FALSE encode the uncached rep error on the next | |
1514 | * operation which sets resp->p and increments resp->opcnt for | |
1515 | * nfs4svc_encode_compoundres. | |
074fe897 | 1516 | * |
074fe897 | 1517 | */ |
abfabf8c AA |
1518 | static __be32 |
1519 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1520 | struct nfsd4_compoundres *resp) | |
074fe897 | 1521 | { |
abfabf8c AA |
1522 | struct nfsd4_op *op; |
1523 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1524 | |
abfabf8c AA |
1525 | /* Encode the replayed sequence operation */ |
1526 | op = &args->ops[resp->opcnt - 1]; | |
1527 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1528 | |
abfabf8c | 1529 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1530 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1531 | op = &args->ops[resp->opcnt++]; |
1532 | op->status = nfserr_retry_uncached_rep; | |
1533 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1534 | } |
abfabf8c | 1535 | return op->status; |
074fe897 AA |
1536 | } |
1537 | ||
1538 | /* | |
557ce264 AA |
1539 | * The sequence operation is not cached because we can use the slot and |
1540 | * session values. | |
074fe897 AA |
1541 | */ |
1542 | __be32 | |
bf864a31 AA |
1543 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1544 | struct nfsd4_sequence *seq) | |
074fe897 | 1545 | { |
557ce264 | 1546 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1547 | __be32 status; |
1548 | ||
557ce264 | 1549 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1550 | |
abfabf8c AA |
1551 | /* Either returns 0 or nfserr_retry_uncached */ |
1552 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1553 | if (status == nfserr_retry_uncached_rep) | |
1554 | return status; | |
074fe897 | 1555 | |
557ce264 AA |
1556 | /* The sequence operation has been encoded, cstate->datap set. */ |
1557 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1558 | |
557ce264 AA |
1559 | resp->opcnt = slot->sl_opcnt; |
1560 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1561 | status = slot->sl_status; | |
074fe897 AA |
1562 | |
1563 | return status; | |
1564 | } | |
1565 | ||
0733d213 AA |
1566 | /* |
1567 | * Set the exchange_id flags returned by the server. | |
1568 | */ | |
1569 | static void | |
1570 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1571 | { | |
1572 | /* pNFS is not supported */ | |
1573 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1574 | ||
1575 | /* Referrals are supported, Migration is not. */ | |
1576 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1577 | ||
1578 | /* set the wire flags to return to client. */ | |
1579 | clid->flags = new->cl_exchange_flags; | |
1580 | } | |
1581 | ||
631fc9ea BF |
1582 | static bool client_has_state(struct nfs4_client *clp) |
1583 | { | |
1584 | /* | |
1585 | * Note clp->cl_openowners check isn't quite right: there's no | |
1586 | * need to count owners without stateid's. | |
1587 | * | |
1588 | * Also note we should probably be using this in 4.0 case too. | |
1589 | */ | |
6eccece9 BF |
1590 | return !list_empty(&clp->cl_openowners) |
1591 | || !list_empty(&clp->cl_delegations) | |
1592 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1593 | } |
1594 | ||
069b6ad4 AA |
1595 | __be32 |
1596 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1597 | struct nfsd4_compound_state *cstate, | |
1598 | struct nfsd4_exchange_id *exid) | |
1599 | { | |
0733d213 | 1600 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1601 | __be32 status; |
363168b4 | 1602 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1603 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1604 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1605 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1606 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1607 | |
363168b4 | 1608 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1609 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1610 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1611 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1612 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1613 | |
a084daf5 | 1614 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1615 | return nfserr_inval; |
1616 | ||
1617 | /* Currently only support SP4_NONE */ | |
1618 | switch (exid->spa_how) { | |
1619 | case SP4_NONE: | |
1620 | break; | |
1621 | case SP4_SSV: | |
044bc1d4 | 1622 | return nfserr_serverfault; |
0733d213 AA |
1623 | default: |
1624 | BUG(); /* checked by xdr code */ | |
1625 | case SP4_MACH_CRED: | |
1626 | return nfserr_serverfault; /* no excuse :-/ */ | |
1627 | } | |
1628 | ||
2dbb269d | 1629 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1630 | nfs4_lock_state(); |
382a62e7 | 1631 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1632 | if (conf) { |
83e08fd4 BF |
1633 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1634 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1635 | ||
136e658d BF |
1636 | if (update) { |
1637 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1638 | status = nfserr_inval; |
1a308118 BF |
1639 | goto out; |
1640 | } | |
136e658d | 1641 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1642 | status = nfserr_perm; |
136e658d BF |
1643 | goto out; |
1644 | } | |
1645 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1646 | status = nfserr_not_same; |
1647 | goto out; | |
1648 | } | |
136e658d BF |
1649 | /* case 6 */ |
1650 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1651 | new = conf; | |
1652 | goto out_copy; | |
0733d213 | 1653 | } |
136e658d | 1654 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1655 | if (client_has_state(conf)) { |
1656 | status = nfserr_clid_inuse; | |
0733d213 AA |
1657 | goto out; |
1658 | } | |
1659 | expire_client(conf); | |
1660 | goto out_new; | |
1661 | } | |
136e658d | 1662 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1663 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1664 | new = conf; |
1665 | goto out_copy; | |
1666 | } | |
1667 | /* case 5, client reboot */ | |
136e658d | 1668 | goto out_new; |
6ddbbbfe MS |
1669 | } |
1670 | ||
2dbb269d | 1671 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1672 | status = nfserr_noent; |
1673 | goto out; | |
0733d213 AA |
1674 | } |
1675 | ||
a99454aa | 1676 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1677 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1678 | expire_client(unconf); |
0733d213 | 1679 | |
2dbb269d | 1680 | /* case 1 (normal case) */ |
0733d213 | 1681 | out_new: |
2216d449 | 1682 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1683 | if (new == NULL) { |
4731030d | 1684 | status = nfserr_jukebox; |
0733d213 AA |
1685 | goto out; |
1686 | } | |
c116a0af | 1687 | new->cl_minorversion = 1; |
0733d213 | 1688 | |
c212cecf | 1689 | gen_clid(new, nn); |
ac55fdc4 | 1690 | add_to_unconfirmed(new); |
0733d213 AA |
1691 | out_copy: |
1692 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1693 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1694 | ||
778df3f0 | 1695 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1696 | nfsd4_set_ex_flags(new, exid); |
1697 | ||
1698 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1699 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1700 | status = nfs_ok; |
1701 | ||
1702 | out: | |
1703 | nfs4_unlock_state(); | |
0733d213 | 1704 | return status; |
069b6ad4 AA |
1705 | } |
1706 | ||
57b7b43b | 1707 | static __be32 |
88e588d5 | 1708 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1709 | { |
88e588d5 AA |
1710 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1711 | slot_seqid); | |
b85d4c01 BH |
1712 | |
1713 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1714 | if (slot_inuse) { |
1715 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1716 | return nfserr_jukebox; |
1717 | else | |
1718 | return nfserr_seq_misordered; | |
1719 | } | |
f6d82485 | 1720 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1721 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1722 | return nfs_ok; |
88e588d5 | 1723 | if (seqid == slot_seqid) |
b85d4c01 | 1724 | return nfserr_replay_cache; |
b85d4c01 BH |
1725 | return nfserr_seq_misordered; |
1726 | } | |
1727 | ||
49557cc7 AA |
1728 | /* |
1729 | * Cache the create session result into the create session single DRC | |
1730 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1731 | * Do this for solo or embedded create session operations. | |
1732 | */ | |
1733 | static void | |
1734 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1735 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1736 | { |
1737 | slot->sl_status = nfserr; | |
1738 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1739 | } | |
1740 | ||
1741 | static __be32 | |
1742 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1743 | struct nfsd4_clid_slot *slot) | |
1744 | { | |
1745 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1746 | return slot->sl_status; | |
1747 | } | |
1748 | ||
1b74c25b MJ |
1749 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1750 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1751 | 1 + /* MIN tag is length with zero, only length */ \ | |
1752 | 3 + /* version, opcount, opcode */ \ | |
1753 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1754 | /* seqid, slotID, slotID, cache */ \ | |
1755 | 4 ) * sizeof(__be32)) | |
1756 | ||
1757 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1758 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1759 | 1 + /* status */ \ | |
1760 | 1 + /* MIN tag is length with zero, only length */ \ | |
1761 | 3 + /* opcount, opcode, opstatus*/ \ | |
1762 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1763 | /* seqid, slotID, slotID, slotID, status */ \ | |
1764 | 5 ) * sizeof(__be32)) | |
1765 | ||
57b7b43b | 1766 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1767 | { |
1768 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1769 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1770 | } | |
1771 | ||
069b6ad4 AA |
1772 | __be32 |
1773 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1774 | struct nfsd4_compound_state *cstate, | |
1775 | struct nfsd4_create_session *cr_ses) | |
1776 | { | |
363168b4 | 1777 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1778 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1779 | struct nfsd4_session *new; |
81f0b2a4 | 1780 | struct nfsd4_conn *conn; |
49557cc7 | 1781 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1782 | __be32 status = 0; |
8daae4dc | 1783 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 1784 | |
a62573dc MJ |
1785 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1786 | return nfserr_inval; | |
49730501 BF |
1787 | if (check_forechannel_attrs(cr_ses->fore_channel)) |
1788 | return nfserr_toosmall; | |
81f0b2a4 BF |
1789 | new = alloc_session(&cr_ses->fore_channel); |
1790 | if (!new) | |
1791 | return nfserr_jukebox; | |
1792 | status = nfserr_jukebox; | |
1793 | conn = alloc_conn_from_crses(rqstp, cr_ses); | |
1794 | if (!conn) | |
1795 | goto out_free_session; | |
a62573dc | 1796 | |
ec6b5d7b | 1797 | nfs4_lock_state(); |
0a7ec377 | 1798 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 1799 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
ec6b5d7b AA |
1800 | |
1801 | if (conf) { | |
49557cc7 AA |
1802 | cs_slot = &conf->cl_cs_slot; |
1803 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1804 | if (status == nfserr_replay_cache) { |
49557cc7 | 1805 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1806 | goto out_free_conn; |
49557cc7 | 1807 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1808 | status = nfserr_seq_misordered; |
81f0b2a4 | 1809 | goto out_free_conn; |
ec6b5d7b | 1810 | } |
ec6b5d7b | 1811 | } else if (unconf) { |
8f9d3d3b | 1812 | struct nfs4_client *old; |
ec6b5d7b | 1813 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1814 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1815 | status = nfserr_clid_inuse; |
81f0b2a4 | 1816 | goto out_free_conn; |
ec6b5d7b | 1817 | } |
49557cc7 AA |
1818 | cs_slot = &unconf->cl_cs_slot; |
1819 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1820 | if (status) { |
1821 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1822 | status = nfserr_seq_misordered; |
81f0b2a4 | 1823 | goto out_free_conn; |
ec6b5d7b | 1824 | } |
382a62e7 | 1825 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
8f9d3d3b BF |
1826 | if (old) |
1827 | expire_client(old); | |
1828 | move_to_confirmed(unconf); | |
ec6b5d7b AA |
1829 | conf = unconf; |
1830 | } else { | |
1831 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1832 | goto out_free_conn; |
ec6b5d7b | 1833 | } |
81f0b2a4 | 1834 | status = nfs_ok; |
408b79bc BF |
1835 | /* |
1836 | * We do not support RDMA or persistent sessions | |
1837 | */ | |
1838 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1839 | cr_ses->flags &= ~SESSION4_RDMA; | |
1840 | ||
81f0b2a4 BF |
1841 | init_session(rqstp, new, conf, cr_ses); |
1842 | nfsd4_init_conn(rqstp, conn, new); | |
1843 | ||
ac7c46f2 | 1844 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1845 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1846 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1847 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1848 | cs_slot->sl_seqid++; |
49557cc7 | 1849 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1850 | |
49557cc7 AA |
1851 | /* cache solo and embedded create sessions under the state lock */ |
1852 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1853 | out: |
1854 | nfs4_unlock_state(); | |
1855 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1856 | return status; | |
81f0b2a4 BF |
1857 | out_free_conn: |
1858 | free_conn(conn); | |
1859 | out_free_session: | |
1860 | __free_session(new); | |
1861 | goto out; | |
069b6ad4 AA |
1862 | } |
1863 | ||
57716355 BF |
1864 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1865 | { | |
1866 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1867 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1868 | ||
1869 | return argp->opcnt == resp->opcnt; | |
1870 | } | |
1871 | ||
1d1bc8f2 BF |
1872 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1873 | { | |
1874 | switch (*dir) { | |
1875 | case NFS4_CDFC4_FORE: | |
1876 | case NFS4_CDFC4_BACK: | |
1877 | return nfs_ok; | |
1878 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1879 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1880 | *dir = NFS4_CDFC4_BOTH; | |
1881 | return nfs_ok; | |
1882 | }; | |
1883 | return nfserr_inval; | |
1884 | } | |
1885 | ||
cb73a9f4 BF |
1886 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
1887 | { | |
1888 | struct nfsd4_session *session = cstate->session; | |
1889 | ||
1890 | spin_lock(&client_lock); | |
1891 | session->se_cb_prog = bc->bc_cb_program; | |
1892 | session->se_cb_sec = bc->bc_cb_sec; | |
1893 | spin_unlock(&client_lock); | |
1894 | ||
1895 | nfsd4_probe_callback(session->se_client); | |
1896 | ||
1897 | return nfs_ok; | |
1898 | } | |
1899 | ||
1d1bc8f2 BF |
1900 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
1901 | struct nfsd4_compound_state *cstate, | |
1902 | struct nfsd4_bind_conn_to_session *bcts) | |
1903 | { | |
1904 | __be32 status; | |
3ba63671 | 1905 | struct nfsd4_conn *conn; |
1d1bc8f2 BF |
1906 | |
1907 | if (!nfsd4_last_compound_op(rqstp)) | |
1908 | return nfserr_not_only_op; | |
1909 | spin_lock(&client_lock); | |
1910 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1911 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1912 | * client_lock iself: */ | |
1913 | if (cstate->session) { | |
1914 | nfsd4_get_session(cstate->session); | |
1915 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1916 | } | |
1917 | spin_unlock(&client_lock); | |
1918 | if (!cstate->session) | |
1919 | return nfserr_badsession; | |
1920 | ||
1921 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
3ba63671 BF |
1922 | if (status) |
1923 | return status; | |
1924 | conn = alloc_conn(rqstp, bcts->dir); | |
1925 | if (!conn) | |
1926 | return nfserr_jukebox; | |
e1ff371f | 1927 | nfsd4_init_conn(rqstp, conn, cstate->session); |
3ba63671 | 1928 | return nfs_ok; |
1d1bc8f2 BF |
1929 | } |
1930 | ||
5d4cec2f BF |
1931 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1932 | { | |
1933 | if (!session) | |
1934 | return 0; | |
1935 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1936 | } | |
1937 | ||
069b6ad4 AA |
1938 | __be32 |
1939 | nfsd4_destroy_session(struct svc_rqst *r, | |
1940 | struct nfsd4_compound_state *cstate, | |
1941 | struct nfsd4_destroy_session *sessionid) | |
1942 | { | |
e10e0cfc | 1943 | struct nfsd4_session *ses; |
57b7b43b | 1944 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1945 | |
1946 | /* Notes: | |
1947 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1948 | * - Should we return nfserr_back_chan_busy if waiting for | |
1949 | * callbacks on to-be-destroyed session? | |
1950 | * - Do we need to clear any callback info from previous session? | |
1951 | */ | |
1952 | ||
5d4cec2f | 1953 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1954 | if (!nfsd4_last_compound_op(r)) |
1955 | return nfserr_not_only_op; | |
1956 | } | |
e10e0cfc | 1957 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1958 | spin_lock(&client_lock); |
e10e0cfc BH |
1959 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1960 | if (!ses) { | |
9089f1b4 | 1961 | spin_unlock(&client_lock); |
e10e0cfc BH |
1962 | goto out; |
1963 | } | |
1964 | ||
1965 | unhash_session(ses); | |
9089f1b4 | 1966 | spin_unlock(&client_lock); |
e10e0cfc | 1967 | |
ab707e15 | 1968 | nfs4_lock_state(); |
84f5f7cc | 1969 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1970 | nfs4_unlock_state(); |
19cf5c02 | 1971 | |
508dc6e1 | 1972 | spin_lock(&client_lock); |
19cf5c02 | 1973 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1974 | nfsd4_put_session_locked(ses); |
1975 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1976 | status = nfs_ok; |
1977 | out: | |
1978 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1979 | return status; | |
069b6ad4 AA |
1980 | } |
1981 | ||
a663bdd8 | 1982 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1983 | { |
1984 | struct nfsd4_conn *c; | |
1985 | ||
1986 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1987 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1988 | return c; |
1989 | } | |
1990 | } | |
1991 | return NULL; | |
1992 | } | |
1993 | ||
a663bdd8 | 1994 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1995 | { |
1996 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1997 | struct nfsd4_conn *c; |
21b75b01 | 1998 | int ret; |
328ead28 BF |
1999 | |
2000 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2001 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
2002 | if (c) { |
2003 | spin_unlock(&clp->cl_lock); | |
2004 | free_conn(new); | |
2005 | return; | |
2006 | } | |
2007 | __nfsd4_hash_conn(new, ses); | |
2008 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2009 | ret = nfsd4_register_conn(new); |
2010 | if (ret) | |
2011 | /* oops; xprt is already down: */ | |
2012 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
2013 | return; |
2014 | } | |
2015 | ||
868b89c3 MJ |
2016 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2017 | { | |
2018 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2019 | ||
2020 | return args->opcnt > session->se_fchannel.maxops; | |
2021 | } | |
2022 | ||
ae82a8d0 MJ |
2023 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2024 | struct nfsd4_session *session) | |
2025 | { | |
2026 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2027 | ||
2028 | return xb->len > session->se_fchannel.maxreq_sz; | |
2029 | } | |
2030 | ||
069b6ad4 | 2031 | __be32 |
b85d4c01 | 2032 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2033 | struct nfsd4_compound_state *cstate, |
2034 | struct nfsd4_sequence *seq) | |
2035 | { | |
f9bb94c4 | 2036 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
2037 | struct nfsd4_session *session; |
2038 | struct nfsd4_slot *slot; | |
a663bdd8 | 2039 | struct nfsd4_conn *conn; |
57b7b43b | 2040 | __be32 status; |
b85d4c01 | 2041 | |
f9bb94c4 AA |
2042 | if (resp->opcnt != 1) |
2043 | return nfserr_sequence_pos; | |
2044 | ||
a663bdd8 BF |
2045 | /* |
2046 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2047 | * below. | |
2048 | */ | |
2049 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2050 | if (!conn) | |
2051 | return nfserr_jukebox; | |
2052 | ||
9089f1b4 | 2053 | spin_lock(&client_lock); |
b85d4c01 BH |
2054 | status = nfserr_badsession; |
2055 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
2056 | if (!session) | |
2057 | goto out; | |
2058 | ||
868b89c3 MJ |
2059 | status = nfserr_too_many_ops; |
2060 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
2061 | goto out; | |
2062 | ||
ae82a8d0 MJ |
2063 | status = nfserr_req_too_big; |
2064 | if (nfsd4_request_too_big(rqstp, session)) | |
2065 | goto out; | |
2066 | ||
b85d4c01 | 2067 | status = nfserr_badslot; |
6c18ba9f | 2068 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
2069 | goto out; |
2070 | ||
557ce264 | 2071 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2072 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2073 | ||
a8dfdaeb AA |
2074 | /* We do not negotiate the number of slots yet, so set the |
2075 | * maxslots to the session maxreqs which is used to encode | |
2076 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2077 | seq->maxslots = session->se_fchannel.maxreqs; | |
2078 | ||
73e79482 BF |
2079 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2080 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2081 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2082 | status = nfserr_seq_misordered; |
2083 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
2084 | goto out; | |
b85d4c01 BH |
2085 | cstate->slot = slot; |
2086 | cstate->session = session; | |
da3846a2 | 2087 | /* Return the cached reply status and set cstate->status |
557ce264 | 2088 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2089 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2090 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2091 | goto out; |
b85d4c01 BH |
2092 | } |
2093 | if (status) | |
2094 | goto out; | |
2095 | ||
a663bdd8 BF |
2096 | nfsd4_sequence_check_conn(conn, session); |
2097 | conn = NULL; | |
328ead28 | 2098 | |
b85d4c01 | 2099 | /* Success! bump slot seqid */ |
b85d4c01 | 2100 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2101 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2102 | if (seq->cachethis) |
2103 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2104 | else |
2105 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2106 | |
2107 | cstate->slot = slot; | |
2108 | cstate->session = session; | |
2109 | ||
b85d4c01 | 2110 | out: |
26c0c75e | 2111 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2112 | if (cstate->session) { |
0d7bb719 BF |
2113 | struct nfs4_client *clp = session->se_client; |
2114 | ||
36acb66b | 2115 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2116 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2117 | switch (clp->cl_cb_state) { |
2118 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2119 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2120 | break; |
2121 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2122 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2123 | break; |
fc0c3dd1 BH |
2124 | default: |
2125 | seq->status_flags = 0; | |
5423732a | 2126 | } |
aaf84eb9 | 2127 | } |
a663bdd8 | 2128 | kfree(conn); |
36acb66b | 2129 | spin_unlock(&client_lock); |
b85d4c01 BH |
2130 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2131 | return status; | |
069b6ad4 AA |
2132 | } |
2133 | ||
345c2842 MJ |
2134 | __be32 |
2135 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2136 | { | |
2137 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2138 | __be32 status = 0; |
8daae4dc | 2139 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2140 | |
2141 | nfs4_lock_state(); | |
0a7ec377 | 2142 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2143 | conf = find_confirmed_client(&dc->clientid, true, nn); |
345c2842 MJ |
2144 | |
2145 | if (conf) { | |
2146 | clp = conf; | |
2147 | ||
6eccece9 | 2148 | if (!is_client_expired(conf) && client_has_state(conf)) { |
345c2842 MJ |
2149 | status = nfserr_clientid_busy; |
2150 | goto out; | |
2151 | } | |
2152 | ||
2153 | /* rfc5661 18.50.3 */ | |
2154 | if (cstate->session && conf == cstate->session->se_client) { | |
2155 | status = nfserr_clientid_busy; | |
2156 | goto out; | |
2157 | } | |
2158 | } else if (unconf) | |
2159 | clp = unconf; | |
2160 | else { | |
2161 | status = nfserr_stale_clientid; | |
2162 | goto out; | |
2163 | } | |
2164 | ||
2165 | expire_client(clp); | |
2166 | out: | |
2167 | nfs4_unlock_state(); | |
2168 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2169 | return status; | |
2170 | } | |
2171 | ||
4dc6ec00 BF |
2172 | __be32 |
2173 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2174 | { | |
57b7b43b | 2175 | __be32 status = 0; |
bcecf1cc | 2176 | |
4dc6ec00 BF |
2177 | if (rc->rca_one_fs) { |
2178 | if (!cstate->current_fh.fh_dentry) | |
2179 | return nfserr_nofilehandle; | |
2180 | /* | |
2181 | * We don't take advantage of the rca_one_fs case. | |
2182 | * That's OK, it's optional, we can safely ignore it. | |
2183 | */ | |
2184 | return nfs_ok; | |
2185 | } | |
bcecf1cc | 2186 | |
4dc6ec00 | 2187 | nfs4_lock_state(); |
bcecf1cc | 2188 | status = nfserr_complete_already; |
a52d726b JL |
2189 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2190 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2191 | goto out; |
2192 | ||
2193 | status = nfserr_stale_clientid; | |
2194 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2195 | /* |
2196 | * The following error isn't really legal. | |
2197 | * But we only get here if the client just explicitly | |
2198 | * destroyed the client. Surely it no longer cares what | |
2199 | * error it gets back on an operation for the dead | |
2200 | * client. | |
2201 | */ | |
bcecf1cc MJ |
2202 | goto out; |
2203 | ||
2204 | status = nfs_ok; | |
2a4317c5 | 2205 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2206 | out: |
4dc6ec00 | 2207 | nfs4_unlock_state(); |
bcecf1cc | 2208 | return status; |
4dc6ec00 BF |
2209 | } |
2210 | ||
b37ad28b | 2211 | __be32 |
b591480b BF |
2212 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2213 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2214 | { |
a084daf5 | 2215 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2216 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2217 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2218 | __be32 status; |
c212cecf SK |
2219 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2220 | ||
63db4632 | 2221 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2222 | nfs4_lock_state(); |
382a62e7 | 2223 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2224 | if (conf) { |
63db4632 | 2225 | /* case 0: */ |
1da177e4 | 2226 | status = nfserr_clid_inuse; |
e203d506 BF |
2227 | if (clp_used_exchangeid(conf)) |
2228 | goto out; | |
026722c2 | 2229 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2230 | char addr_str[INET6_ADDRSTRLEN]; |
2231 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2232 | sizeof(addr_str)); | |
2233 | dprintk("NFSD: setclientid: string in use by client " | |
2234 | "at %s\n", addr_str); | |
1da177e4 LT |
2235 | goto out; |
2236 | } | |
1da177e4 | 2237 | } |
a99454aa | 2238 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2239 | if (unconf) |
2240 | expire_client(unconf); | |
3e772463 | 2241 | status = nfserr_jukebox; |
2216d449 | 2242 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2243 | if (new == NULL) |
2244 | goto out; | |
34b232bb | 2245 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2246 | /* case 1: probable callback update */ |
1da177e4 | 2247 | copy_clid(new, conf); |
34b232bb | 2248 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2249 | gen_clid(new, nn); |
8323c3b2 | 2250 | new->cl_minorversion = 0; |
6f3d772f | 2251 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2252 | add_to_unconfirmed(new); |
1da177e4 LT |
2253 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2254 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2255 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2256 | status = nfs_ok; | |
2257 | out: | |
2258 | nfs4_unlock_state(); | |
2259 | return status; | |
2260 | } | |
2261 | ||
2262 | ||
b37ad28b | 2263 | __be32 |
b591480b BF |
2264 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2265 | struct nfsd4_compound_state *cstate, | |
2266 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2267 | { |
21ab45a4 | 2268 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2269 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2270 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2271 | __be32 status; |
7f2210fa | 2272 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2273 | |
2c142baa | 2274 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2275 | return nfserr_stale_clientid; |
1da177e4 | 2276 | nfs4_lock_state(); |
21ab45a4 | 2277 | |
8daae4dc | 2278 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2279 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2280 | /* |
8695b90a BF |
2281 | * We try hard to give out unique clientid's, so if we get an |
2282 | * attempt to confirm the same clientid with a different cred, | |
2283 | * there's a bug somewhere. Let's charitably assume it's our | |
2284 | * bug. | |
a186e767 | 2285 | */ |
8695b90a BF |
2286 | status = nfserr_serverfault; |
2287 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2288 | goto out; | |
2289 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2290 | goto out; | |
63db4632 | 2291 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2292 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2293 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2294 | status = nfs_ok; |
90d700b7 BF |
2295 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2296 | status = nfserr_stale_clientid; | |
2297 | goto out; | |
2298 | } | |
2299 | status = nfs_ok; | |
2300 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2301 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2302 | nfsd4_probe_callback(conf); | |
2303 | expire_client(unconf); | |
90d700b7 | 2304 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2305 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
0d22f68f | 2306 | if (conf) |
8695b90a | 2307 | expire_client(conf); |
8695b90a | 2308 | move_to_confirmed(unconf); |
f3d03b92 | 2309 | nfsd4_probe_callback(unconf); |
08e8987c | 2310 | } |
1da177e4 | 2311 | out: |
1da177e4 LT |
2312 | nfs4_unlock_state(); |
2313 | return status; | |
2314 | } | |
2315 | ||
32513b40 BF |
2316 | static struct nfs4_file *nfsd4_alloc_file(void) |
2317 | { | |
2318 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2319 | } | |
2320 | ||
1da177e4 | 2321 | /* OPEN Share state helper functions */ |
32513b40 | 2322 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2323 | { |
1da177e4 LT |
2324 | unsigned int hashval = file_hashval(ino); |
2325 | ||
32513b40 BF |
2326 | atomic_set(&fp->fi_ref, 1); |
2327 | INIT_LIST_HEAD(&fp->fi_hash); | |
2328 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2329 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2330 | fp->fi_inode = igrab(ino); | |
2331 | fp->fi_had_conflict = false; | |
2332 | fp->fi_lease = NULL; | |
2333 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2334 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2335 | spin_lock(&recall_lock); | |
2336 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2337 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2338 | } |
2339 | ||
e60d4398 | 2340 | static void |
e18b890b | 2341 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2342 | { |
e60d4398 N |
2343 | if (*slab == NULL) |
2344 | return; | |
1a1d92c1 | 2345 | kmem_cache_destroy(*slab); |
e60d4398 | 2346 | *slab = NULL; |
1da177e4 LT |
2347 | } |
2348 | ||
e8ff2a84 | 2349 | void |
1da177e4 LT |
2350 | nfsd4_free_slabs(void) |
2351 | { | |
fe0750e5 BF |
2352 | nfsd4_free_slab(&openowner_slab); |
2353 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2354 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2355 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2356 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2357 | } |
1da177e4 | 2358 | |
72083396 | 2359 | int |
e60d4398 N |
2360 | nfsd4_init_slabs(void) |
2361 | { | |
fe0750e5 BF |
2362 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2363 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2364 | if (openowner_slab == NULL) | |
2365 | goto out_nomem; | |
2366 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2367 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2368 | if (lockowner_slab == NULL) |
e60d4398 N |
2369 | goto out_nomem; |
2370 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2371 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2372 | if (file_slab == NULL) |
2373 | goto out_nomem; | |
5ac049ac | 2374 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2375 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2376 | if (stateid_slab == NULL) |
2377 | goto out_nomem; | |
5b2d21c1 | 2378 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2379 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2380 | if (deleg_slab == NULL) |
2381 | goto out_nomem; | |
e60d4398 N |
2382 | return 0; |
2383 | out_nomem: | |
2384 | nfsd4_free_slabs(); | |
2385 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2386 | return -ENOMEM; | |
1da177e4 LT |
2387 | } |
2388 | ||
fe0750e5 BF |
2389 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2390 | { | |
2391 | kfree(oo->oo_owner.so_owner.data); | |
2392 | kmem_cache_free(openowner_slab, oo); | |
2393 | } | |
2394 | ||
2395 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2396 | { |
fe0750e5 BF |
2397 | kfree(lo->lo_owner.so_owner.data); |
2398 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2399 | } |
2400 | ||
ff194bd9 | 2401 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2402 | { |
ff194bd9 BF |
2403 | rp->rp_status = nfserr_serverfault; |
2404 | rp->rp_buflen = 0; | |
2405 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2406 | } |
2407 | ||
fe0750e5 | 2408 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2409 | { |
1da177e4 | 2410 | struct nfs4_stateowner *sop; |
1da177e4 | 2411 | |
fe0750e5 | 2412 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2413 | if (!sop) |
2414 | return NULL; | |
2415 | ||
2416 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2417 | if (!sop->so_owner.data) { | |
fe0750e5 | 2418 | kmem_cache_free(slab, sop); |
1da177e4 | 2419 | return NULL; |
ff194bd9 BF |
2420 | } |
2421 | sop->so_owner.len = owner->len; | |
2422 | ||
ea1da636 | 2423 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2424 | sop->so_client = clp; |
2425 | init_nfs4_replay(&sop->so_replay); | |
2426 | return sop; | |
2427 | } | |
2428 | ||
fe0750e5 | 2429 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2430 | { |
16bfdaaf | 2431 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2432 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2433 | } |
2434 | ||
fe0750e5 | 2435 | static struct nfs4_openowner * |
ff194bd9 | 2436 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2437 | struct nfs4_openowner *oo; |
ff194bd9 | 2438 | |
fe0750e5 BF |
2439 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2440 | if (!oo) | |
ff194bd9 | 2441 | return NULL; |
fe0750e5 BF |
2442 | oo->oo_owner.so_is_open_owner = 1; |
2443 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2444 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2445 | oo->oo_time = 0; |
38c387b5 | 2446 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2447 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2448 | hash_openowner(oo, clp, strhashval); | |
2449 | return oo; | |
1da177e4 LT |
2450 | } |
2451 | ||
996e0938 | 2452 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2453 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2454 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2455 | |
996e0938 | 2456 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2457 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2458 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2459 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2460 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2461 | get_nfs4_file(fp); |
1da177e4 | 2462 | stp->st_file = fp; |
1da177e4 LT |
2463 | stp->st_access_bmap = 0; |
2464 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2465 | set_access(open->op_share_access, stp); |
ce0fc43c | 2466 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2467 | stp->st_openstp = NULL; |
1da177e4 LT |
2468 | } |
2469 | ||
fd39ca9a | 2470 | static void |
fe0750e5 | 2471 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2472 | { |
fe0750e5 | 2473 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2474 | |
fe0750e5 BF |
2475 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2476 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2477 | } |
2478 | ||
1da177e4 | 2479 | static int |
599e0a22 BF |
2480 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2481 | clientid_t *clid) | |
2482 | { | |
2483 | return (sop->so_owner.len == owner->len) && | |
2484 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2485 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2486 | } |
2487 | ||
fe0750e5 | 2488 | static struct nfs4_openowner * |
d15c077e | 2489 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, bool sessions) |
1da177e4 | 2490 | { |
a50d2ad1 BF |
2491 | struct nfs4_stateowner *so; |
2492 | struct nfs4_openowner *oo; | |
d15c077e | 2493 | struct nfs4_client *clp; |
1da177e4 | 2494 | |
16bfdaaf BF |
2495 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2496 | if (!so->so_is_open_owner) | |
2497 | continue; | |
a50d2ad1 BF |
2498 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2499 | oo = openowner(so); | |
d15c077e BF |
2500 | clp = oo->oo_owner.so_client; |
2501 | if ((bool)clp->cl_minorversion != sessions) | |
2502 | return NULL; | |
a50d2ad1 BF |
2503 | renew_client(oo->oo_owner.so_client); |
2504 | return oo; | |
2505 | } | |
1da177e4 LT |
2506 | } |
2507 | return NULL; | |
2508 | } | |
2509 | ||
2510 | /* search file_hashtbl[] for file */ | |
2511 | static struct nfs4_file * | |
2512 | find_file(struct inode *ino) | |
2513 | { | |
2514 | unsigned int hashval = file_hashval(ino); | |
2515 | struct nfs4_file *fp; | |
2516 | ||
8b671b80 | 2517 | spin_lock(&recall_lock); |
1da177e4 | 2518 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2519 | if (fp->fi_inode == ino) { |
2520 | get_nfs4_file(fp); | |
8b671b80 | 2521 | spin_unlock(&recall_lock); |
1da177e4 | 2522 | return fp; |
13cd2184 | 2523 | } |
1da177e4 | 2524 | } |
8b671b80 | 2525 | spin_unlock(&recall_lock); |
1da177e4 LT |
2526 | return NULL; |
2527 | } | |
2528 | ||
1da177e4 LT |
2529 | /* |
2530 | * Called to check deny when READ with all zero stateid or | |
2531 | * WRITE with all zero or all one stateid | |
2532 | */ | |
b37ad28b | 2533 | static __be32 |
1da177e4 LT |
2534 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2535 | { | |
2536 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2537 | struct nfs4_file *fp; | |
dcef0413 | 2538 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2539 | __be32 ret; |
1da177e4 LT |
2540 | |
2541 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2542 | ||
2543 | fp = find_file(ino); | |
13cd2184 N |
2544 | if (!fp) |
2545 | return nfs_ok; | |
b700949b | 2546 | ret = nfserr_locked; |
1da177e4 | 2547 | /* Search for conflicting share reservations */ |
13cd2184 | 2548 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2549 | if (test_deny(deny_type, stp) || |
2550 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2551 | goto out; |
1da177e4 | 2552 | } |
13cd2184 N |
2553 | ret = nfs_ok; |
2554 | out: | |
2555 | put_nfs4_file(fp); | |
2556 | return ret; | |
1da177e4 LT |
2557 | } |
2558 | ||
6b57d9c8 | 2559 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2560 | { |
1da177e4 LT |
2561 | /* We're assuming the state code never drops its reference |
2562 | * without first removing the lease. Since we're in this lease | |
2563 | * callback (and since the lease code is serialized by the kernel | |
2564 | * lock) we know the server hasn't removed the lease yet, we know | |
2565 | * it's safe to take a reference: */ | |
2566 | atomic_inc(&dp->dl_count); | |
2567 | ||
1da177e4 | 2568 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2569 | |
460781b5 | 2570 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2571 | dp->dl_time = get_seconds(); |
2572 | ||
6b57d9c8 BF |
2573 | nfsd4_cb_recall(dp); |
2574 | } | |
2575 | ||
acfdf5c3 | 2576 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2577 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2578 | { | |
acfdf5c3 BF |
2579 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2580 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2581 | |
7fa10cd1 BF |
2582 | if (!fp) { |
2583 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2584 | return; | |
2585 | } | |
2586 | if (fp->fi_had_conflict) { | |
2587 | WARN(1, "duplicate break on %p\n", fp); | |
2588 | return; | |
2589 | } | |
0272e1fd BF |
2590 | /* |
2591 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2592 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2593 | * in time: |
0272e1fd BF |
2594 | */ |
2595 | fl->fl_break_time = 0; | |
1da177e4 | 2596 | |
5d926e8c | 2597 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2598 | fp->fi_had_conflict = true; |
2599 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2600 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2601 | spin_unlock(&recall_lock); |
1da177e4 LT |
2602 | } |
2603 | ||
1da177e4 LT |
2604 | static |
2605 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2606 | { | |
2607 | if (arg & F_UNLCK) | |
2608 | return lease_modify(onlist, arg); | |
2609 | else | |
2610 | return -EAGAIN; | |
2611 | } | |
2612 | ||
7b021967 | 2613 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2614 | .lm_break = nfsd_break_deleg_cb, |
2615 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2616 | }; |
2617 | ||
7a8711c9 BF |
2618 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2619 | { | |
2620 | if (nfsd4_has_session(cstate)) | |
2621 | return nfs_ok; | |
2622 | if (seqid == so->so_seqid - 1) | |
2623 | return nfserr_replay_me; | |
2624 | if (seqid == so->so_seqid) | |
2625 | return nfs_ok; | |
2626 | return nfserr_bad_seqid; | |
2627 | } | |
1da177e4 | 2628 | |
b37ad28b | 2629 | __be32 |
6668958f AA |
2630 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2631 | struct nfsd4_open *open) | |
1da177e4 | 2632 | { |
1da177e4 LT |
2633 | clientid_t *clientid = &open->op_clientid; |
2634 | struct nfs4_client *clp = NULL; | |
2635 | unsigned int strhashval; | |
fe0750e5 | 2636 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2637 | __be32 status; |
2c142baa | 2638 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 | 2639 | |
2c142baa | 2640 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2641 | return nfserr_stale_clientid; |
32513b40 BF |
2642 | /* |
2643 | * In case we need it later, after we've already created the | |
2644 | * file and don't want to risk a further failure: | |
2645 | */ | |
2646 | open->op_file = nfsd4_alloc_file(); | |
2647 | if (open->op_file == NULL) | |
2648 | return nfserr_jukebox; | |
1da177e4 | 2649 | |
16bfdaaf | 2650 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
d15c077e | 2651 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion); |
fe0750e5 BF |
2652 | open->op_openowner = oo; |
2653 | if (!oo) { | |
8daae4dc SK |
2654 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2655 | nn); | |
1da177e4 | 2656 | if (clp == NULL) |
0f442aa2 | 2657 | return nfserr_expired; |
bcf130f9 | 2658 | goto new_owner; |
1da177e4 | 2659 | } |
dad1c067 | 2660 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2661 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2662 | clp = oo->oo_owner.so_client; |
2663 | release_openowner(oo); | |
2664 | open->op_openowner = NULL; | |
bcf130f9 | 2665 | goto new_owner; |
0f442aa2 | 2666 | } |
4cdc951b BF |
2667 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2668 | if (status) | |
2669 | return status; | |
2670 | clp = oo->oo_owner.so_client; | |
2671 | goto alloc_stateid; | |
bcf130f9 BF |
2672 | new_owner: |
2673 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2674 | if (oo == NULL) | |
2675 | return nfserr_jukebox; | |
2676 | open->op_openowner = oo; | |
4cdc951b BF |
2677 | alloc_stateid: |
2678 | open->op_stp = nfs4_alloc_stateid(clp); | |
2679 | if (!open->op_stp) | |
2680 | return nfserr_jukebox; | |
0f442aa2 | 2681 | return nfs_ok; |
1da177e4 LT |
2682 | } |
2683 | ||
b37ad28b | 2684 | static inline __be32 |
4a6e43e6 N |
2685 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2686 | { | |
2687 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2688 | return nfserr_openmode; | |
2689 | else | |
2690 | return nfs_ok; | |
2691 | } | |
2692 | ||
f459e453 | 2693 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2694 | { |
f459e453 | 2695 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2696 | } |
2697 | ||
38c2f4b1 | 2698 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2699 | { |
f459e453 | 2700 | struct nfs4_stid *ret; |
24a0111e | 2701 | |
38c2f4b1 | 2702 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2703 | if (!ret) |
2704 | return NULL; | |
2705 | return delegstateid(ret); | |
24a0111e BF |
2706 | } |
2707 | ||
8b289b2c BF |
2708 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2709 | { | |
2710 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2711 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2712 | } | |
2713 | ||
b37ad28b | 2714 | static __be32 |
38c2f4b1 | 2715 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2716 | struct nfs4_delegation **dp) |
2717 | { | |
2718 | int flags; | |
b37ad28b | 2719 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2720 | |
38c2f4b1 | 2721 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2722 | if (*dp == NULL) |
c44c5eeb | 2723 | goto out; |
24a0111e | 2724 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2725 | status = nfs4_check_delegmode(*dp, flags); |
2726 | if (status) | |
2727 | *dp = NULL; | |
c44c5eeb | 2728 | out: |
8b289b2c | 2729 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2730 | return nfs_ok; |
2731 | if (status) | |
2732 | return status; | |
dad1c067 | 2733 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2734 | return nfs_ok; |
567d9829 N |
2735 | } |
2736 | ||
b37ad28b | 2737 | static __be32 |
dcef0413 | 2738 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2739 | { |
dcef0413 | 2740 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2741 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2742 | |
8beefa24 | 2743 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2744 | /* ignore lock owners */ |
2745 | if (local->st_stateowner->so_is_open_owner == 0) | |
2746 | continue; | |
2747 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2748 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2749 | *stpp = local; |
2750 | /* check for conflicting share reservations */ | |
2751 | if (!test_share(local, open)) | |
77eaae8d | 2752 | return nfserr_share_denied; |
1da177e4 | 2753 | } |
77eaae8d | 2754 | return nfs_ok; |
1da177e4 LT |
2755 | } |
2756 | ||
21fb4016 BF |
2757 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2758 | { | |
2759 | int flags = 0; | |
2760 | ||
2761 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2762 | flags |= NFSD_MAY_READ; | |
2763 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2764 | flags |= NFSD_MAY_WRITE; | |
2765 | return flags; | |
2766 | } | |
2767 | ||
0c12eaff CB |
2768 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2769 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2770 | { |
2771 | __be32 status; | |
0c12eaff CB |
2772 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2773 | int access = nfs4_access_to_access(open->op_share_access); | |
2774 | ||
f9d7562f BF |
2775 | if (!fp->fi_fds[oflag]) { |
2776 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2777 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2778 | if (status) |
2779 | return status; | |
2780 | } | |
2781 | nfs4_file_get_access(fp, oflag); | |
2782 | ||
2783 | return nfs_ok; | |
2784 | } | |
2785 | ||
b37ad28b | 2786 | static inline __be32 |
1da177e4 LT |
2787 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2788 | struct nfsd4_open *open) | |
2789 | { | |
2790 | struct iattr iattr = { | |
2791 | .ia_valid = ATTR_SIZE, | |
2792 | .ia_size = 0, | |
2793 | }; | |
2794 | if (!open->op_truncate) | |
2795 | return 0; | |
2796 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2797 | return nfserr_inval; |
1da177e4 LT |
2798 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2799 | } | |
2800 | ||
b37ad28b | 2801 | static __be32 |
dcef0413 | 2802 | 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 | 2803 | { |
b6d2f1ca | 2804 | u32 op_share_access = open->op_share_access; |
7d947842 | 2805 | bool new_access; |
b37ad28b | 2806 | __be32 status; |
1da177e4 | 2807 | |
82c5ff1b | 2808 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2809 | if (new_access) { |
0c12eaff | 2810 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2811 | if (status) |
2812 | return status; | |
6c26d08f | 2813 | } |
1da177e4 LT |
2814 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2815 | if (status) { | |
f9d7562f | 2816 | if (new_access) { |
f197c271 | 2817 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2818 | nfs4_file_put_access(fp, oflag); |
2819 | } | |
1da177e4 LT |
2820 | return status; |
2821 | } | |
2822 | /* remember the open */ | |
82c5ff1b | 2823 | set_access(op_share_access, stp); |
ce0fc43c | 2824 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2825 | |
2826 | return nfs_ok; | |
2827 | } | |
2828 | ||
2829 | ||
1da177e4 | 2830 | static void |
1255a8f3 | 2831 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2832 | { |
dad1c067 | 2833 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2834 | } |
2835 | ||
14a24e99 BF |
2836 | /* Should we give out recallable state?: */ |
2837 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2838 | { | |
2839 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2840 | return true; | |
2841 | /* | |
2842 | * In the sessions case, since we don't have to establish a | |
2843 | * separate connection for callbacks, we assume it's OK | |
2844 | * until we hear otherwise: | |
2845 | */ | |
2846 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2847 | } | |
2848 | ||
22d38c4c BF |
2849 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2850 | { | |
2851 | struct file_lock *fl; | |
2852 | ||
2853 | fl = locks_alloc_lock(); | |
2854 | if (!fl) | |
2855 | return NULL; | |
2856 | locks_init_lock(fl); | |
2857 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2858 | fl->fl_flags = FL_LEASE; | |
2859 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2860 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2861 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2862 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2863 | return fl; |
2864 | } | |
2865 | ||
edab9782 BF |
2866 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2867 | { | |
acfdf5c3 | 2868 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2869 | struct file_lock *fl; |
2870 | int status; | |
2871 | ||
2872 | fl = nfs4_alloc_init_lease(dp, flag); | |
2873 | if (!fl) | |
2874 | return -ENOMEM; | |
acfdf5c3 | 2875 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2876 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2877 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2878 | if (status) { |
acfdf5c3 | 2879 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2880 | locks_free_lock(fl); |
2881 | return -ENOMEM; | |
2882 | } | |
acfdf5c3 | 2883 | fp->fi_lease = fl; |
cb0942b8 | 2884 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
2885 | atomic_set(&fp->fi_delegees, 1); |
2886 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2887 | return 0; | |
2888 | } | |
2889 | ||
2890 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2891 | { | |
2892 | struct nfs4_file *fp = dp->dl_file; | |
2893 | ||
2894 | if (!fp->fi_lease) | |
2895 | return nfs4_setlease(dp, flag); | |
2896 | spin_lock(&recall_lock); | |
2897 | if (fp->fi_had_conflict) { | |
2898 | spin_unlock(&recall_lock); | |
2899 | return -EAGAIN; | |
2900 | } | |
2901 | atomic_inc(&fp->fi_delegees); | |
2902 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2903 | spin_unlock(&recall_lock); | |
2a74aba7 | 2904 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2905 | return 0; |
2906 | } | |
2907 | ||
4aa8913c BH |
2908 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2909 | { | |
2910 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2911 | if (status == -EAGAIN) | |
2912 | open->op_why_no_deleg = WND4_CONTENTION; | |
2913 | else { | |
2914 | open->op_why_no_deleg = WND4_RESOURCE; | |
2915 | switch (open->op_deleg_want) { | |
2916 | case NFS4_SHARE_WANT_READ_DELEG: | |
2917 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2918 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2919 | break; | |
2920 | case NFS4_SHARE_WANT_CANCEL: | |
2921 | open->op_why_no_deleg = WND4_CANCELLED; | |
2922 | break; | |
2923 | case NFS4_SHARE_WANT_NO_DELEG: | |
2924 | BUG(); /* not supposed to get here */ | |
2925 | } | |
2926 | } | |
2927 | } | |
2928 | ||
1da177e4 LT |
2929 | /* |
2930 | * Attempt to hand out a delegation. | |
2931 | */ | |
2932 | static void | |
5ccb0066 SK |
2933 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
2934 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
2935 | { |
2936 | struct nfs4_delegation *dp; | |
fe0750e5 | 2937 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2938 | int cb_up; |
d24433cd | 2939 | int status = 0, flag = 0; |
1da177e4 | 2940 | |
fe0750e5 | 2941 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2942 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2943 | open->op_recall = 0; |
2944 | switch (open->op_claim_type) { | |
2945 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2946 | if (!cb_up) |
7b190fec N |
2947 | open->op_recall = 1; |
2948 | flag = open->op_delegate_type; | |
2949 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2950 | goto out; | |
2951 | break; | |
2952 | case NFS4_OPEN_CLAIM_NULL: | |
2953 | /* Let's not give out any delegations till everyone's | |
2954 | * had the chance to reclaim theirs.... */ | |
5ccb0066 | 2955 | if (locks_in_grace(net)) |
7b190fec | 2956 | goto out; |
dad1c067 | 2957 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2958 | goto out; |
2959 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2960 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2961 | else | |
2962 | flag = NFS4_OPEN_DELEGATE_READ; | |
2963 | break; | |
2964 | default: | |
2965 | goto out; | |
2966 | } | |
1da177e4 | 2967 | |
fe0750e5 | 2968 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2969 | if (dp == NULL) |
2970 | goto out_no_deleg; | |
acfdf5c3 | 2971 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2972 | if (status) |
dd239cc0 | 2973 | goto out_free; |
1da177e4 | 2974 | |
d5477a8d | 2975 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2976 | |
8c10cbdb | 2977 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2978 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2979 | out: |
2980 | open->op_delegate_type = flag; | |
d24433cd BH |
2981 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2982 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2983 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2984 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2985 | ||
4aa8913c BH |
2986 | /* 4.1 client asking for a delegation? */ |
2987 | if (open->op_deleg_want) | |
2988 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 2989 | } |
dd239cc0 BF |
2990 | return; |
2991 | out_free: | |
acfdf5c3 | 2992 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2993 | out_no_deleg: |
2994 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2995 | goto out; | |
1da177e4 LT |
2996 | } |
2997 | ||
e27f49c3 BH |
2998 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
2999 | struct nfs4_delegation *dp) | |
3000 | { | |
3001 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3002 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3003 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3004 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3005 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3006 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3007 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3008 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3009 | } | |
3010 | /* Otherwise the client must be confused wanting a delegation | |
3011 | * it already has, therefore we don't return | |
3012 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3013 | */ | |
3014 | } | |
3015 | ||
1da177e4 LT |
3016 | /* |
3017 | * called with nfs4_lock_state() held. | |
3018 | */ | |
b37ad28b | 3019 | __be32 |
1da177e4 LT |
3020 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3021 | { | |
6668958f | 3022 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3023 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3024 | struct nfs4_file *fp = NULL; |
3025 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3026 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3027 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3028 | __be32 status; |
1da177e4 | 3029 | |
1da177e4 LT |
3030 | /* |
3031 | * Lookup file; if found, lookup stateid and check open request, | |
3032 | * and check for delegations in the process of being recalled. | |
3033 | * If not found, create the nfs4_file struct | |
3034 | */ | |
3035 | fp = find_file(ino); | |
3036 | if (fp) { | |
3037 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3038 | goto out; | |
38c2f4b1 | 3039 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3040 | if (status) |
3041 | goto out; | |
1da177e4 | 3042 | } else { |
c44c5eeb | 3043 | status = nfserr_bad_stateid; |
8b289b2c | 3044 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3045 | goto out; |
3e772463 | 3046 | status = nfserr_jukebox; |
32513b40 BF |
3047 | fp = open->op_file; |
3048 | open->op_file = NULL; | |
3049 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3050 | } |
3051 | ||
3052 | /* | |
3053 | * OPEN the file, or upgrade an existing OPEN. | |
3054 | * If truncate fails, the OPEN fails. | |
3055 | */ | |
3056 | if (stp) { | |
3057 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3058 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3059 | if (status) |
3060 | goto out; | |
3061 | } else { | |
4cdc951b | 3062 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3063 | if (status) |
3064 | goto out; | |
3065 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3066 | if (status) |
1da177e4 | 3067 | goto out; |
4cdc951b BF |
3068 | stp = open->op_stp; |
3069 | open->op_stp = NULL; | |
996e0938 | 3070 | init_open_stateid(stp, fp, open); |
1da177e4 | 3071 | } |
dcef0413 BF |
3072 | update_stateid(&stp->st_stid.sc_stateid); |
3073 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3074 | |
d24433cd | 3075 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3076 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3077 | |
d24433cd BH |
3078 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3079 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3080 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3081 | goto nodeleg; | |
3082 | } | |
3083 | } | |
3084 | ||
1da177e4 LT |
3085 | /* |
3086 | * Attempt to hand out a delegation. No error return, because the | |
3087 | * OPEN succeeds even if we fail. | |
3088 | */ | |
5ccb0066 | 3089 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3090 | nodeleg: |
1da177e4 LT |
3091 | status = nfs_ok; |
3092 | ||
8c10cbdb | 3093 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3094 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3095 | out: |
d24433cd BH |
3096 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3097 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3098 | open->op_deleg_want) |
3099 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3100 | |
13cd2184 N |
3101 | if (fp) |
3102 | put_nfs4_file(fp); | |
37515177 | 3103 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3104 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3105 | /* |
3106 | * To finish the open response, we just need to set the rflags. | |
3107 | */ | |
3108 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3109 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3110 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3111 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3112 | ||
3113 | return status; | |
3114 | } | |
3115 | ||
d29b20cd BF |
3116 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3117 | { | |
3118 | if (open->op_openowner) { | |
3119 | struct nfs4_openowner *oo = open->op_openowner; | |
3120 | ||
3121 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3122 | list_del_init(&oo->oo_close_lru); | |
3123 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3124 | if (status) { | |
3125 | release_openowner(oo); | |
3126 | open->op_openowner = NULL; | |
3127 | } else | |
3128 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3129 | } | |
3130 | } | |
32513b40 BF |
3131 | if (open->op_file) |
3132 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3133 | if (open->op_stp) |
ef79859e | 3134 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3135 | } |
3136 | ||
b37ad28b | 3137 | __be32 |
b591480b BF |
3138 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3139 | clientid_t *clid) | |
1da177e4 LT |
3140 | { |
3141 | struct nfs4_client *clp; | |
b37ad28b | 3142 | __be32 status; |
7f2210fa | 3143 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3144 | |
3145 | nfs4_lock_state(); | |
3146 | dprintk("process_renew(%08x/%08x): starting\n", | |
3147 | clid->cl_boot, clid->cl_id); | |
3148 | status = nfserr_stale_clientid; | |
2c142baa | 3149 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3150 | goto out; |
8daae4dc | 3151 | clp = find_confirmed_client(clid, cstate->minorversion, nn); |
1da177e4 LT |
3152 | status = nfserr_expired; |
3153 | if (clp == NULL) { | |
3154 | /* We assume the client took too long to RENEW. */ | |
3155 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3156 | goto out; | |
3157 | } | |
1da177e4 | 3158 | status = nfserr_cb_path_down; |
ea1da636 | 3159 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3160 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3161 | goto out; |
3162 | status = nfs_ok; | |
3163 | out: | |
3164 | nfs4_unlock_state(); | |
3165 | return status; | |
3166 | } | |
3167 | ||
a76b4319 | 3168 | static void |
5e1533c7 | 3169 | nfsd4_end_grace(struct net *net) |
a76b4319 | 3170 | { |
5e1533c7 SK |
3171 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
3172 | ||
33dcc481 | 3173 | /* do nothing if grace period already ended */ |
a51c84ed | 3174 | if (nn->grace_ended) |
33dcc481 JL |
3175 | return; |
3176 | ||
a76b4319 | 3177 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3178 | nn->grace_ended = true; |
2c142baa | 3179 | nfsd4_record_grace_done(net, nn->boot_time); |
5e1533c7 | 3180 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3181 | /* |
3182 | * Now that every NFSv4 client has had the chance to recover and | |
3183 | * to see the (possibly new, possibly shorter) lease time, we | |
3184 | * can safely set the next grace time to the current lease time: | |
3185 | */ | |
3186 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3187 | } |
3188 | ||
fd39ca9a | 3189 | static time_t |
1da177e4 LT |
3190 | nfs4_laundromat(void) |
3191 | { | |
3192 | struct nfs4_client *clp; | |
fe0750e5 | 3193 | struct nfs4_openowner *oo; |
1da177e4 LT |
3194 | struct nfs4_delegation *dp; |
3195 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3196 | time_t cutoff = get_seconds() - nfsd4_lease; |
3197 | time_t t, clientid_val = nfsd4_lease; | |
3198 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3199 | |
3200 | nfs4_lock_state(); | |
3201 | ||
3202 | dprintk("NFSD: laundromat service - starting\n"); | |
5e1533c7 | 3203 | nfsd4_end_grace(&init_net); |
36acb66b BH |
3204 | INIT_LIST_HEAD(&reaplist); |
3205 | spin_lock(&client_lock); | |
1da177e4 LT |
3206 | list_for_each_safe(pos, next, &client_lru) { |
3207 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3208 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3209 | t = clp->cl_time - cutoff; | |
3210 | if (clientid_val > t) | |
3211 | clientid_val = t; | |
3212 | break; | |
3213 | } | |
d7682988 BH |
3214 | if (atomic_read(&clp->cl_refcount)) { |
3215 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3216 | clp->cl_clientid.cl_id); | |
3217 | continue; | |
3218 | } | |
3219 | unhash_client_locked(clp); | |
3220 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3221 | } |
3222 | spin_unlock(&client_lock); | |
3223 | list_for_each_safe(pos, next, &reaplist) { | |
3224 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3225 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3226 | clp->cl_clientid.cl_id); | |
3227 | expire_client(clp); | |
3228 | } | |
1da177e4 LT |
3229 | spin_lock(&recall_lock); |
3230 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3231 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3232 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3233 | u = dp->dl_time - cutoff; | |
3234 | if (test_val > u) | |
3235 | test_val = u; | |
3236 | break; | |
3237 | } | |
1da177e4 LT |
3238 | list_move(&dp->dl_recall_lru, &reaplist); |
3239 | } | |
3240 | spin_unlock(&recall_lock); | |
3241 | list_for_each_safe(pos, next, &reaplist) { | |
3242 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3243 | unhash_delegation(dp); |
3244 | } | |
cf07d2ea | 3245 | test_val = nfsd4_lease; |
1da177e4 | 3246 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3247 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3248 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3249 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3250 | if (test_val > u) |
3251 | test_val = u; | |
3252 | break; | |
3253 | } | |
fe0750e5 | 3254 | release_openowner(oo); |
1da177e4 LT |
3255 | } |
3256 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3257 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3258 | nfs4_unlock_state(); | |
3259 | return clientid_val; | |
3260 | } | |
3261 | ||
a254b246 HH |
3262 | static struct workqueue_struct *laundry_wq; |
3263 | static void laundromat_main(struct work_struct *); | |
3264 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3265 | ||
3266 | static void | |
c4028958 | 3267 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3268 | { |
3269 | time_t t; | |
3270 | ||
3271 | t = nfs4_laundromat(); | |
3272 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3273 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3274 | } |
3275 | ||
f7a4d872 | 3276 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3277 | { |
f7a4d872 BF |
3278 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3279 | return nfserr_bad_stateid; | |
3280 | return nfs_ok; | |
1da177e4 LT |
3281 | } |
3282 | ||
3283 | static int | |
2c142baa | 3284 | STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) |
1da177e4 | 3285 | { |
2c142baa | 3286 | if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) |
e4e83ea4 BF |
3287 | return 0; |
3288 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3289 | STATEID_VAL(stateid)); |
e4e83ea4 | 3290 | return 1; |
1da177e4 LT |
3291 | } |
3292 | ||
3293 | static inline int | |
82c5ff1b | 3294 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3295 | { |
82c5ff1b JL |
3296 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3297 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3298 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3299 | } |
3300 | ||
3301 | static inline int | |
82c5ff1b | 3302 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3303 | { |
82c5ff1b JL |
3304 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3305 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3306 | } |
3307 | ||
3308 | static | |
dcef0413 | 3309 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3310 | { |
b37ad28b | 3311 | __be32 status = nfserr_openmode; |
1da177e4 | 3312 | |
02921914 BF |
3313 | /* For lock stateid's, we test the parent open, not the lock: */ |
3314 | if (stp->st_openstp) | |
3315 | stp = stp->st_openstp; | |
82c5ff1b | 3316 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3317 | goto out; |
82c5ff1b | 3318 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3319 | goto out; |
3320 | status = nfs_ok; | |
3321 | out: | |
3322 | return status; | |
3323 | } | |
3324 | ||
b37ad28b | 3325 | static inline __be32 |
5ccb0066 | 3326 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3327 | { |
203a8c8e | 3328 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3329 | return nfs_ok; |
5ccb0066 | 3330 | else if (locks_in_grace(net)) { |
25985edc | 3331 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3332 | * conflicting state; so we must wait out the grace period. */ |
3333 | return nfserr_grace; | |
3334 | } else if (flags & WR_STATE) | |
3335 | return nfs4_share_conflict(current_fh, | |
3336 | NFS4_SHARE_DENY_WRITE); | |
3337 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3338 | return nfs4_share_conflict(current_fh, | |
3339 | NFS4_SHARE_DENY_READ); | |
3340 | } | |
3341 | ||
3342 | /* | |
3343 | * Allow READ/WRITE during grace period on recovered state only for files | |
3344 | * that are not able to provide mandatory locking. | |
3345 | */ | |
3346 | static inline int | |
5ccb0066 | 3347 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3348 | { |
5ccb0066 | 3349 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3350 | } |
3351 | ||
81b82965 BF |
3352 | /* Returns true iff a is later than b: */ |
3353 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3354 | { | |
3355 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3356 | } | |
3357 | ||
57b7b43b | 3358 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3359 | { |
6668958f AA |
3360 | /* |
3361 | * When sessions are used the stateid generation number is ignored | |
3362 | * when it is zero. | |
3363 | */ | |
28dde241 | 3364 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3365 | return nfs_ok; |
3366 | ||
3367 | if (in->si_generation == ref->si_generation) | |
3368 | return nfs_ok; | |
6668958f | 3369 | |
0836f587 | 3370 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3371 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3372 | return nfserr_bad_stateid; |
3373 | /* | |
81b82965 BF |
3374 | * However, we could see a stateid from the past, even from a |
3375 | * non-buggy client. For example, if the client sends a lock | |
3376 | * while some IO is outstanding, the lock may bump si_generation | |
3377 | * while the IO is still in flight. The client could avoid that | |
3378 | * situation by waiting for responses on all the IO requests, | |
3379 | * but better performance may result in retrying IO that | |
3380 | * receives an old_stateid error if requests are rarely | |
3381 | * reordered in flight: | |
0836f587 | 3382 | */ |
81b82965 | 3383 | return nfserr_old_stateid; |
0836f587 BF |
3384 | } |
3385 | ||
7df302f7 | 3386 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3387 | { |
97b7e3b6 BF |
3388 | struct nfs4_stid *s; |
3389 | struct nfs4_ol_stateid *ols; | |
3390 | __be32 status; | |
17456804 | 3391 | |
7df302f7 CL |
3392 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3393 | return nfserr_bad_stateid; | |
3394 | /* Client debugging aid. */ | |
3395 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3396 | char addr_str[INET6_ADDRSTRLEN]; | |
3397 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3398 | sizeof(addr_str)); | |
3399 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3400 | "with incorrect client ID\n", addr_str); | |
3401 | return nfserr_bad_stateid; | |
3402 | } | |
38c2f4b1 | 3403 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3404 | if (!s) |
7df302f7 | 3405 | return nfserr_bad_stateid; |
36279ac1 | 3406 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3407 | if (status) |
97b7e3b6 BF |
3408 | return status; |
3409 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3410 | return nfs_ok; | |
3411 | ols = openlockstateid(s); | |
3412 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3413 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3414 | return nfserr_bad_stateid; |
3415 | return nfs_ok; | |
17456804 BS |
3416 | } |
3417 | ||
d15c077e | 3418 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s, bool sessions) |
38c2f4b1 BF |
3419 | { |
3420 | struct nfs4_client *cl; | |
2c142baa | 3421 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
38c2f4b1 BF |
3422 | |
3423 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3424 | return nfserr_bad_stateid; | |
2c142baa | 3425 | if (STALE_STATEID(stateid, nn)) |
38c2f4b1 | 3426 | return nfserr_stale_stateid; |
8daae4dc | 3427 | cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions, nn); |
38c2f4b1 BF |
3428 | if (!cl) |
3429 | return nfserr_expired; | |
3430 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3431 | if (!*s) | |
3432 | return nfserr_bad_stateid; | |
3433 | return nfs_ok; | |
3434 | ||
3435 | } | |
3436 | ||
1da177e4 LT |
3437 | /* |
3438 | * Checks for stateid operations | |
3439 | */ | |
b37ad28b | 3440 | __be32 |
5ccb0066 | 3441 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3442 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3443 | { |
69064a27 | 3444 | struct nfs4_stid *s; |
dcef0413 | 3445 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3446 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3447 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3448 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3449 | __be32 status; |
1da177e4 | 3450 | |
1da177e4 LT |
3451 | if (filpp) |
3452 | *filpp = NULL; | |
3453 | ||
5ccb0066 | 3454 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3455 | return nfserr_grace; |
3456 | ||
3457 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3458 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3459 | |
d15c077e | 3460 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s, cstate->minorversion); |
38c2f4b1 BF |
3461 | if (status) |
3462 | return status; | |
69064a27 BF |
3463 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3464 | if (status) | |
3465 | goto out; | |
f7a4d872 BF |
3466 | switch (s->sc_type) { |
3467 | case NFS4_DELEG_STID: | |
69064a27 | 3468 | dp = delegstateid(s); |
dc9bf700 BF |
3469 | status = nfs4_check_delegmode(dp, flags); |
3470 | if (status) | |
3471 | goto out; | |
43b0178e | 3472 | if (filpp) { |
acfdf5c3 | 3473 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3474 | BUG_ON(!*filpp); |
3475 | } | |
f7a4d872 BF |
3476 | break; |
3477 | case NFS4_OPEN_STID: | |
3478 | case NFS4_LOCK_STID: | |
69064a27 | 3479 | stp = openlockstateid(s); |
f7a4d872 BF |
3480 | status = nfs4_check_fh(current_fh, stp); |
3481 | if (status) | |
1da177e4 | 3482 | goto out; |
fe0750e5 | 3483 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3484 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3485 | goto out; |
a4455be0 BF |
3486 | status = nfs4_check_openmode(stp, flags); |
3487 | if (status) | |
1da177e4 | 3488 | goto out; |
f9d7562f BF |
3489 | if (filpp) { |
3490 | if (flags & RD_STATE) | |
3491 | *filpp = find_readable_file(stp->st_file); | |
3492 | else | |
3493 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3494 | } |
f7a4d872 BF |
3495 | break; |
3496 | default: | |
3497 | return nfserr_bad_stateid; | |
1da177e4 LT |
3498 | } |
3499 | status = nfs_ok; | |
3500 | out: | |
3501 | return status; | |
3502 | } | |
3503 | ||
e1ca12df | 3504 | static __be32 |
dcef0413 | 3505 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3506 | { |
fe0750e5 | 3507 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3508 | return nfserr_locks_held; |
3509 | release_lock_stateid(stp); | |
3510 | return nfs_ok; | |
3511 | } | |
3512 | ||
17456804 BS |
3513 | /* |
3514 | * Test if the stateid is valid | |
3515 | */ | |
3516 | __be32 | |
3517 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3518 | struct nfsd4_test_stateid *test_stateid) | |
3519 | { | |
03cfb420 BS |
3520 | struct nfsd4_test_stateid_id *stateid; |
3521 | struct nfs4_client *cl = cstate->session->se_client; | |
3522 | ||
3523 | nfs4_lock_state(); | |
3524 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3525 | stateid->ts_id_status = |
3526 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3527 | nfs4_unlock_state(); |
3528 | ||
17456804 BS |
3529 | return nfs_ok; |
3530 | } | |
3531 | ||
e1ca12df BS |
3532 | __be32 |
3533 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3534 | struct nfsd4_free_stateid *free_stateid) | |
3535 | { | |
3536 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3537 | struct nfs4_stid *s; |
38c2f4b1 | 3538 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3539 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3540 | |
3541 | nfs4_lock_state(); | |
38c2f4b1 | 3542 | s = find_stateid(cl, stateid); |
2da1cec7 | 3543 | if (!s) |
81b82965 | 3544 | goto out; |
2da1cec7 BF |
3545 | switch (s->sc_type) { |
3546 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3547 | ret = nfserr_locks_held; |
3548 | goto out; | |
2da1cec7 BF |
3549 | case NFS4_OPEN_STID: |
3550 | case NFS4_LOCK_STID: | |
3551 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3552 | if (ret) | |
3553 | goto out; | |
3554 | if (s->sc_type == NFS4_LOCK_STID) | |
3555 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3556 | else | |
3557 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3558 | break; |
3559 | default: | |
3560 | ret = nfserr_bad_stateid; | |
e1ca12df | 3561 | } |
e1ca12df BS |
3562 | out: |
3563 | nfs4_unlock_state(); | |
3564 | return ret; | |
3565 | } | |
3566 | ||
4c4cd222 N |
3567 | static inline int |
3568 | setlkflg (int type) | |
3569 | { | |
3570 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3571 | RD_STATE : WR_STATE; | |
3572 | } | |
1da177e4 | 3573 | |
dcef0413 | 3574 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3575 | { |
3576 | struct svc_fh *current_fh = &cstate->current_fh; | |
3577 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3578 | __be32 status; | |
3579 | ||
c0a5d93e BF |
3580 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3581 | if (status) | |
3582 | return status; | |
f7a4d872 BF |
3583 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3584 | /* | |
3585 | * "Closed" stateid's exist *only* to return | |
3586 | * nfserr_replay_me from the previous step. | |
3587 | */ | |
3588 | return nfserr_bad_stateid; | |
3589 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3590 | if (status) | |
3591 | return status; | |
3592 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3593 | } |
3594 | ||
1da177e4 LT |
3595 | /* |
3596 | * Checks for sequence id mutating operations. | |
3597 | */ | |
b37ad28b | 3598 | static __be32 |
dd453dfd | 3599 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3600 | stateid_t *stateid, char typemask, |
dcef0413 | 3601 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3602 | { |
0836f587 | 3603 | __be32 status; |
38c2f4b1 | 3604 | struct nfs4_stid *s; |
1da177e4 | 3605 | |
8c10cbdb BH |
3606 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3607 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3608 | |
1da177e4 | 3609 | *stpp = NULL; |
d15c077e | 3610 | status = nfsd4_lookup_stateid(stateid, typemask, &s, cstate->minorversion); |
c0a5d93e BF |
3611 | if (status) |
3612 | return status; | |
38c2f4b1 | 3613 | *stpp = openlockstateid(s); |
c0a5d93e | 3614 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3615 | |
c0a5d93e BF |
3616 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3617 | } | |
39325bd0 | 3618 | |
dcef0413 | 3619 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3620 | { |
3621 | __be32 status; | |
3622 | struct nfs4_openowner *oo; | |
1da177e4 | 3623 | |
c0a5d93e | 3624 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3625 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3626 | if (status) |
3627 | return status; | |
c0a5d93e | 3628 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3629 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3630 | return nfserr_bad_stateid; |
3a4f98bb | 3631 | return nfs_ok; |
1da177e4 LT |
3632 | } |
3633 | ||
b37ad28b | 3634 | __be32 |
ca364317 | 3635 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3636 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3637 | { |
b37ad28b | 3638 | __be32 status; |
fe0750e5 | 3639 | struct nfs4_openowner *oo; |
dcef0413 | 3640 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3641 | |
3642 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3643 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3644 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3645 | |
ca364317 | 3646 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3647 | if (status) |
3648 | return status; | |
1da177e4 LT |
3649 | |
3650 | nfs4_lock_state(); | |
3651 | ||
9072d5c6 | 3652 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3653 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3654 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3655 | if (status) |
68b66e82 | 3656 | goto out; |
fe0750e5 | 3657 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3658 | status = nfserr_bad_stateid; |
dad1c067 | 3659 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3660 | goto out; |
dad1c067 | 3661 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3662 | update_stateid(&stp->st_stid.sc_stateid); |
3663 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3664 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3665 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3666 | |
2a4317c5 | 3667 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3668 | status = nfs_ok; |
1da177e4 | 3669 | out: |
5ec094c1 BF |
3670 | if (!cstate->replay_owner) |
3671 | nfs4_unlock_state(); | |
1da177e4 LT |
3672 | return status; |
3673 | } | |
3674 | ||
6409a5a6 | 3675 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3676 | { |
82c5ff1b | 3677 | if (!test_access(access, stp)) |
6409a5a6 BF |
3678 | return; |
3679 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3680 | clear_access(access, stp); |
6409a5a6 | 3681 | } |
f197c271 | 3682 | |
6409a5a6 BF |
3683 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3684 | { | |
3685 | switch (to_access) { | |
3686 | case NFS4_SHARE_ACCESS_READ: | |
3687 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3688 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3689 | break; | |
3690 | case NFS4_SHARE_ACCESS_WRITE: | |
3691 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3692 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3693 | break; | |
3694 | case NFS4_SHARE_ACCESS_BOTH: | |
3695 | break; | |
3696 | default: | |
3697 | BUG(); | |
1da177e4 LT |
3698 | } |
3699 | } | |
3700 | ||
3701 | static void | |
ce0fc43c | 3702 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3703 | { |
3704 | int i; | |
3705 | for (i = 0; i < 4; i++) { | |
3706 | if ((i & deny) != i) | |
ce0fc43c | 3707 | clear_deny(i, stp); |
1da177e4 LT |
3708 | } |
3709 | } | |
3710 | ||
b37ad28b | 3711 | __be32 |
ca364317 BF |
3712 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3713 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3714 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3715 | { |
b37ad28b | 3716 | __be32 status; |
dcef0413 | 3717 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3718 | |
3719 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3720 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3721 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3722 | |
c30e92df | 3723 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3724 | if (od->od_deleg_want) |
3725 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3726 | od->od_deleg_want); | |
1da177e4 LT |
3727 | |
3728 | nfs4_lock_state(); | |
c0a5d93e BF |
3729 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3730 | &od->od_stateid, &stp); | |
9072d5c6 | 3731 | if (status) |
1da177e4 | 3732 | goto out; |
1da177e4 | 3733 | status = nfserr_inval; |
82c5ff1b JL |
3734 | if (!test_access(od->od_share_access, stp)) { |
3735 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3736 | stp->st_access_bmap, od->od_share_access); |
3737 | goto out; | |
3738 | } | |
ce0fc43c | 3739 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3740 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3741 | stp->st_deny_bmap, od->od_share_deny); | |
3742 | goto out; | |
3743 | } | |
6409a5a6 | 3744 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3745 | |
ce0fc43c | 3746 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3747 | |
dcef0413 BF |
3748 | update_stateid(&stp->st_stid.sc_stateid); |
3749 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3750 | status = nfs_ok; |
3751 | out: | |
5ec094c1 BF |
3752 | if (!cstate->replay_owner) |
3753 | nfs4_unlock_state(); | |
1da177e4 LT |
3754 | return status; |
3755 | } | |
3756 | ||
38c387b5 BF |
3757 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3758 | { | |
3759 | struct nfs4_openowner *oo; | |
3760 | struct nfs4_ol_stateid *s; | |
3761 | ||
3762 | if (!so->so_is_open_owner) | |
3763 | return; | |
3764 | oo = openowner(so); | |
3765 | s = oo->oo_last_closed_stid; | |
3766 | if (!s) | |
3767 | return; | |
3768 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3769 | /* Release the last_closed_stid on the next seqid bump: */ | |
3770 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3771 | return; | |
3772 | } | |
3773 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3774 | release_last_closed_stateid(oo); |
3775 | } | |
3776 | ||
3777 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3778 | { | |
3779 | unhash_open_stateid(s); | |
3780 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3781 | } |
3782 | ||
1da177e4 LT |
3783 | /* |
3784 | * nfs4_unlock_state() called after encode | |
3785 | */ | |
b37ad28b | 3786 | __be32 |
ca364317 | 3787 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3788 | struct nfsd4_close *close) |
1da177e4 | 3789 | { |
b37ad28b | 3790 | __be32 status; |
fe0750e5 | 3791 | struct nfs4_openowner *oo; |
dcef0413 | 3792 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3793 | |
3794 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3795 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3796 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3797 | |
3798 | nfs4_lock_state(); | |
f7a4d872 BF |
3799 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3800 | &close->cl_stateid, | |
3801 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3802 | &stp); | |
9072d5c6 | 3803 | if (status) |
1da177e4 | 3804 | goto out; |
fe0750e5 | 3805 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3806 | status = nfs_ok; |
dcef0413 BF |
3807 | update_stateid(&stp->st_stid.sc_stateid); |
3808 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3809 | |
f7a4d872 | 3810 | nfsd4_close_open_stateid(stp); |
cf9182e9 | 3811 | release_last_closed_stateid(oo); |
38c387b5 | 3812 | oo->oo_last_closed_stid = stp; |
04ef5954 | 3813 | |
74dbafaf BF |
3814 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3815 | if (cstate->minorversion) { | |
3816 | release_openowner(oo); | |
3817 | cstate->replay_owner = NULL; | |
3818 | } else { | |
3819 | /* | |
3820 | * In the 4.0 case we need to keep the owners around a | |
3821 | * little while to handle CLOSE replay. | |
3822 | */ | |
3823 | if (list_empty(&oo->oo_owner.so_stateids)) | |
3824 | move_to_close_lru(oo); | |
3825 | } | |
3826 | } | |
1da177e4 | 3827 | out: |
5ec094c1 BF |
3828 | if (!cstate->replay_owner) |
3829 | nfs4_unlock_state(); | |
1da177e4 LT |
3830 | return status; |
3831 | } | |
3832 | ||
b37ad28b | 3833 | __be32 |
ca364317 BF |
3834 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3835 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3836 | { |
203a8c8e BF |
3837 | struct nfs4_delegation *dp; |
3838 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3839 | struct nfs4_stid *s; |
b37ad28b | 3840 | __be32 status; |
1da177e4 | 3841 | |
ca364317 | 3842 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 3843 | return status; |
1da177e4 LT |
3844 | |
3845 | nfs4_lock_state(); | |
d15c077e | 3846 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion); |
38c2f4b1 | 3847 | if (status) |
203a8c8e | 3848 | goto out; |
38c2f4b1 | 3849 | dp = delegstateid(s); |
d5477a8d | 3850 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3851 | if (status) |
3852 | goto out; | |
203a8c8e BF |
3853 | |
3854 | unhash_delegation(dp); | |
1da177e4 | 3855 | out: |
203a8c8e BF |
3856 | nfs4_unlock_state(); |
3857 | ||
1da177e4 LT |
3858 | return status; |
3859 | } | |
3860 | ||
3861 | ||
1da177e4 | 3862 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3863 | |
009673b4 BF |
3864 | #define LOCKOWNER_INO_HASH_BITS 8 |
3865 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3866 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3867 | |
87df4de8 BH |
3868 | static inline u64 |
3869 | end_offset(u64 start, u64 len) | |
3870 | { | |
3871 | u64 end; | |
3872 | ||
3873 | end = start + len; | |
3874 | return end >= start ? end: NFS4_MAX_UINT64; | |
3875 | } | |
3876 | ||
3877 | /* last octet in a range */ | |
3878 | static inline u64 | |
3879 | last_byte_offset(u64 start, u64 len) | |
3880 | { | |
3881 | u64 end; | |
3882 | ||
3883 | BUG_ON(!len); | |
3884 | end = start + len; | |
3885 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3886 | } | |
3887 | ||
009673b4 | 3888 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3889 | { |
3890 | return (file_hashval(inode) + cl_id | |
3891 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3892 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3893 | } |
3894 | ||
009673b4 | 3895 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3896 | |
1da177e4 LT |
3897 | /* |
3898 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3899 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3900 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3901 | * locking, this prevents us from being completely protocol-compliant. The | |
3902 | * real solution to this problem is to start using unsigned file offsets in | |
3903 | * the VFS, but this is a very deep change! | |
3904 | */ | |
3905 | static inline void | |
3906 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3907 | { | |
3908 | if (lock->fl_start < 0) | |
3909 | lock->fl_start = OFFSET_MAX; | |
3910 | if (lock->fl_end < 0) | |
3911 | lock->fl_end = OFFSET_MAX; | |
3912 | } | |
3913 | ||
d5b9026a N |
3914 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3915 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3916 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3917 | }; |
1da177e4 LT |
3918 | |
3919 | static inline void | |
3920 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3921 | { | |
fe0750e5 | 3922 | struct nfs4_lockowner *lo; |
1da177e4 | 3923 | |
d5b9026a | 3924 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3925 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3926 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3927 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3928 | if (!deny->ld_owner.data) |
3929 | /* We just don't care that much */ | |
3930 | goto nevermind; | |
fe0750e5 BF |
3931 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3932 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3933 | } else { |
7c13f344 BF |
3934 | nevermind: |
3935 | deny->ld_owner.len = 0; | |
3936 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3937 | deny->ld_clientid.cl_boot = 0; |
3938 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3939 | } |
3940 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3941 | deny->ld_length = NFS4_MAX_UINT64; |
3942 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3943 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3944 | deny->ld_type = NFS4_READ_LT; | |
3945 | if (fl->fl_type != F_RDLCK) | |
3946 | deny->ld_type = NFS4_WRITE_LT; | |
3947 | } | |
3948 | ||
b93d87c1 BF |
3949 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3950 | { | |
3951 | struct nfs4_ol_stateid *lst; | |
3952 | ||
3953 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3954 | return false; | |
3955 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3956 | struct nfs4_ol_stateid, st_perstateowner); | |
3957 | return lst->st_file->fi_inode == inode; | |
3958 | } | |
3959 | ||
fe0750e5 BF |
3960 | static struct nfs4_lockowner * |
3961 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3962 | struct xdr_netobj *owner) |
3963 | { | |
009673b4 | 3964 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3965 | struct nfs4_lockowner *lo; |
1da177e4 | 3966 | |
009673b4 | 3967 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3968 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3969 | return lo; | |
1da177e4 LT |
3970 | } |
3971 | return NULL; | |
3972 | } | |
3973 | ||
dcef0413 | 3974 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3975 | { |
009673b4 BF |
3976 | struct inode *inode = open_stp->st_file->fi_inode; |
3977 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3978 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3979 | ||
16bfdaaf | 3980 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3981 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3982 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3983 | } |
3984 | ||
1da177e4 LT |
3985 | /* |
3986 | * Alloc a lock owner structure. | |
3987 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3988 | * occurred. |
1da177e4 | 3989 | * |
16bfdaaf | 3990 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3991 | */ |
3992 | ||
fe0750e5 | 3993 | static struct nfs4_lockowner * |
dcef0413 | 3994 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3995 | struct nfs4_lockowner *lo; |
1da177e4 | 3996 | |
fe0750e5 BF |
3997 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3998 | if (!lo) | |
1da177e4 | 3999 | return NULL; |
fe0750e5 BF |
4000 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4001 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4002 | /* It is the openowner seqid that will be incremented in encode in the |
4003 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4004 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4005 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4006 | return lo; | |
1da177e4 LT |
4007 | } |
4008 | ||
dcef0413 BF |
4009 | static struct nfs4_ol_stateid * |
4010 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4011 | { |
dcef0413 | 4012 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4013 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4014 | |
996e0938 | 4015 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4016 | if (stp == NULL) |
6136d2b4 | 4017 | return NULL; |
996e0938 | 4018 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 4019 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4020 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4021 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4022 | get_nfs4_file(fp); |
1da177e4 | 4023 | stp->st_file = fp; |
0997b173 | 4024 | stp->st_access_bmap = 0; |
1da177e4 | 4025 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4026 | stp->st_openstp = open_stp; |
1da177e4 LT |
4027 | return stp; |
4028 | } | |
4029 | ||
fd39ca9a | 4030 | static int |
1da177e4 LT |
4031 | check_lock_length(u64 offset, u64 length) |
4032 | { | |
87df4de8 | 4033 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4034 | LOFF_OVERFLOW(offset, length))); |
4035 | } | |
4036 | ||
dcef0413 | 4037 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4038 | { |
4039 | struct nfs4_file *fp = lock_stp->st_file; | |
4040 | int oflag = nfs4_access_to_omode(access); | |
4041 | ||
82c5ff1b | 4042 | if (test_access(access, lock_stp)) |
0997b173 BF |
4043 | return; |
4044 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4045 | set_access(access, lock_stp); |
0997b173 BF |
4046 | } |
4047 | ||
2355c596 | 4048 | 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 |
4049 | { |
4050 | struct nfs4_file *fi = ost->st_file; | |
4051 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4052 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4053 | struct nfs4_lockowner *lo; | |
4054 | unsigned int strhashval; | |
4055 | ||
4056 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
4057 | if (lo) { | |
4058 | if (!cstate->minorversion) | |
4059 | return nfserr_bad_seqid; | |
4060 | /* XXX: a lockowner always has exactly one stateid: */ | |
4061 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4062 | struct nfs4_ol_stateid, st_perstateowner); | |
4063 | return nfs_ok; | |
4064 | } | |
16bfdaaf | 4065 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4066 | &lock->v.new.owner); |
4067 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4068 | if (lo == NULL) | |
4069 | return nfserr_jukebox; | |
4070 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4071 | if (*lst == NULL) { | |
4072 | release_lockowner(lo); | |
4073 | return nfserr_jukebox; | |
4074 | } | |
4075 | *new = true; | |
4076 | return nfs_ok; | |
4077 | } | |
4078 | ||
1da177e4 LT |
4079 | /* |
4080 | * LOCK operation | |
4081 | */ | |
b37ad28b | 4082 | __be32 |
ca364317 | 4083 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4084 | struct nfsd4_lock *lock) |
1da177e4 | 4085 | { |
fe0750e5 BF |
4086 | struct nfs4_openowner *open_sop = NULL; |
4087 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4088 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4089 | struct file *filp = NULL; |
21179d81 JL |
4090 | struct file_lock *file_lock = NULL; |
4091 | struct file_lock *conflock = NULL; | |
b37ad28b | 4092 | __be32 status = 0; |
64a284d0 | 4093 | bool new_state = false; |
b34f27aa | 4094 | int lkflg; |
b8dd7b9a | 4095 | int err; |
7f2210fa | 4096 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4097 | |
4098 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4099 | (long long) lock->lk_offset, | |
4100 | (long long) lock->lk_length); | |
4101 | ||
1da177e4 LT |
4102 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4103 | return nfserr_inval; | |
4104 | ||
ca364317 | 4105 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4106 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4107 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4108 | return status; | |
4109 | } | |
4110 | ||
1da177e4 LT |
4111 | nfs4_lock_state(); |
4112 | ||
4113 | if (lock->lk_is_new) { | |
dcef0413 | 4114 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4115 | |
4116 | if (nfsd4_has_session(cstate)) | |
4117 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4118 | memcpy(&lock->v.new.clientid, | |
4119 | &cstate->session->se_client->cl_clientid, | |
4120 | sizeof(clientid_t)); | |
4121 | ||
1da177e4 | 4122 | status = nfserr_stale_clientid; |
2c142baa | 4123 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4124 | goto out; |
1da177e4 | 4125 | |
1da177e4 | 4126 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4127 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4128 | lock->lk_new_open_seqid, |
4129 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4130 | &open_stp); |
37515177 | 4131 | if (status) |
1da177e4 | 4132 | goto out; |
fe0750e5 | 4133 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4134 | status = nfserr_bad_stateid; |
684e5638 | 4135 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4136 | &lock->v.new.clientid)) |
4137 | goto out; | |
64a284d0 BF |
4138 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4139 | &lock_stp, &new_state); | |
e1aaa891 | 4140 | } else |
dd453dfd | 4141 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4142 | lock->lk_old_lock_seqid, |
4143 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4144 | NFS4_LOCK_STID, &lock_stp); |
e1aaa891 BF |
4145 | if (status) |
4146 | goto out; | |
64a284d0 | 4147 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4148 | |
b34f27aa BF |
4149 | lkflg = setlkflg(lock->lk_type); |
4150 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4151 | if (status) | |
4152 | goto out; | |
4153 | ||
0dd395dc | 4154 | status = nfserr_grace; |
5ccb0066 | 4155 | if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) |
0dd395dc N |
4156 | goto out; |
4157 | status = nfserr_no_grace; | |
5ccb0066 | 4158 | if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) |
0dd395dc N |
4159 | goto out; |
4160 | ||
21179d81 JL |
4161 | file_lock = locks_alloc_lock(); |
4162 | if (!file_lock) { | |
4163 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4164 | status = nfserr_jukebox; | |
4165 | goto out; | |
4166 | } | |
4167 | ||
4168 | locks_init_lock(file_lock); | |
1da177e4 LT |
4169 | switch (lock->lk_type) { |
4170 | case NFS4_READ_LT: | |
4171 | case NFS4_READW_LT: | |
0997b173 BF |
4172 | filp = find_readable_file(lock_stp->st_file); |
4173 | if (filp) | |
4174 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4175 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4176 | break; |
1da177e4 LT |
4177 | case NFS4_WRITE_LT: |
4178 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4179 | filp = find_writeable_file(lock_stp->st_file); |
4180 | if (filp) | |
4181 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4182 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4183 | break; |
1da177e4 LT |
4184 | default: |
4185 | status = nfserr_inval; | |
4186 | goto out; | |
4187 | } | |
f9d7562f BF |
4188 | if (!filp) { |
4189 | status = nfserr_openmode; | |
4190 | goto out; | |
4191 | } | |
21179d81 JL |
4192 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4193 | file_lock->fl_pid = current->tgid; | |
4194 | file_lock->fl_file = filp; | |
4195 | file_lock->fl_flags = FL_POSIX; | |
4196 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4197 | file_lock->fl_start = lock->lk_offset; | |
4198 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4199 | nfs4_transform_lock_offset(file_lock); | |
4200 | ||
4201 | conflock = locks_alloc_lock(); | |
4202 | if (!conflock) { | |
4203 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4204 | status = nfserr_jukebox; | |
4205 | goto out; | |
4206 | } | |
1da177e4 | 4207 | |
21179d81 | 4208 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4209 | switch (-err) { |
1da177e4 | 4210 | case 0: /* success! */ |
dcef0413 BF |
4211 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4212 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4213 | sizeof(stateid_t)); |
b8dd7b9a | 4214 | status = 0; |
eb76b3fd AA |
4215 | break; |
4216 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4217 | status = nfserr_denied; | |
4218 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4219 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4220 | break; |
1da177e4 LT |
4221 | case (EDEADLK): |
4222 | status = nfserr_deadlock; | |
eb76b3fd | 4223 | break; |
3e772463 | 4224 | default: |
fd85b817 | 4225 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4226 | status = nfserrno(err); |
eb76b3fd | 4227 | break; |
1da177e4 | 4228 | } |
1da177e4 | 4229 | out: |
64a284d0 | 4230 | if (status && new_state) |
f044ff83 | 4231 | release_lockowner(lock_sop); |
5ec094c1 BF |
4232 | if (!cstate->replay_owner) |
4233 | nfs4_unlock_state(); | |
21179d81 JL |
4234 | if (file_lock) |
4235 | locks_free_lock(file_lock); | |
4236 | if (conflock) | |
4237 | locks_free_lock(conflock); | |
1da177e4 LT |
4238 | return status; |
4239 | } | |
4240 | ||
55ef1274 BF |
4241 | /* |
4242 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4243 | * so we do a temporary open here just to get an open file to pass to | |
4244 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4245 | * inode operation.) | |
4246 | */ | |
04da6e9d | 4247 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4248 | { |
4249 | struct file *file; | |
04da6e9d AV |
4250 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4251 | if (!err) { | |
4252 | err = nfserrno(vfs_test_lock(file, lock)); | |
4253 | nfsd_close(file); | |
4254 | } | |
55ef1274 BF |
4255 | return err; |
4256 | } | |
4257 | ||
1da177e4 LT |
4258 | /* |
4259 | * LOCKT operation | |
4260 | */ | |
b37ad28b | 4261 | __be32 |
ca364317 BF |
4262 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4263 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4264 | { |
4265 | struct inode *inode; | |
21179d81 | 4266 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4267 | struct nfs4_lockowner *lo; |
b37ad28b | 4268 | __be32 status; |
7f2210fa | 4269 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4270 | |
5ccb0066 | 4271 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4272 | return nfserr_grace; |
4273 | ||
4274 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4275 | return nfserr_inval; | |
4276 | ||
1da177e4 LT |
4277 | nfs4_lock_state(); |
4278 | ||
4279 | status = nfserr_stale_clientid; | |
2c142baa | 4280 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) |
1da177e4 | 4281 | goto out; |
1da177e4 | 4282 | |
75c096f7 | 4283 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4284 | goto out; |
1da177e4 | 4285 | |
ca364317 | 4286 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4287 | file_lock = locks_alloc_lock(); |
4288 | if (!file_lock) { | |
4289 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4290 | status = nfserr_jukebox; | |
4291 | goto out; | |
4292 | } | |
4293 | locks_init_lock(file_lock); | |
1da177e4 LT |
4294 | switch (lockt->lt_type) { |
4295 | case NFS4_READ_LT: | |
4296 | case NFS4_READW_LT: | |
21179d81 | 4297 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4298 | break; |
4299 | case NFS4_WRITE_LT: | |
4300 | case NFS4_WRITEW_LT: | |
21179d81 | 4301 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4302 | break; |
4303 | default: | |
2fdada03 | 4304 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4305 | status = nfserr_inval; |
4306 | goto out; | |
4307 | } | |
4308 | ||
fe0750e5 BF |
4309 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4310 | if (lo) | |
21179d81 JL |
4311 | file_lock->fl_owner = (fl_owner_t)lo; |
4312 | file_lock->fl_pid = current->tgid; | |
4313 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4314 | |
21179d81 JL |
4315 | file_lock->fl_start = lockt->lt_offset; |
4316 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4317 | |
21179d81 | 4318 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4319 | |
21179d81 | 4320 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4321 | if (status) |
fd85b817 | 4322 | goto out; |
04da6e9d | 4323 | |
21179d81 | 4324 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4325 | status = nfserr_denied; |
21179d81 | 4326 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4327 | } |
4328 | out: | |
4329 | nfs4_unlock_state(); | |
21179d81 JL |
4330 | if (file_lock) |
4331 | locks_free_lock(file_lock); | |
1da177e4 LT |
4332 | return status; |
4333 | } | |
4334 | ||
b37ad28b | 4335 | __be32 |
ca364317 | 4336 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4337 | struct nfsd4_locku *locku) |
1da177e4 | 4338 | { |
dcef0413 | 4339 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4340 | struct file *filp = NULL; |
21179d81 | 4341 | struct file_lock *file_lock = NULL; |
b37ad28b | 4342 | __be32 status; |
b8dd7b9a | 4343 | int err; |
1da177e4 LT |
4344 | |
4345 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4346 | (long long) locku->lu_offset, | |
4347 | (long long) locku->lu_length); | |
4348 | ||
4349 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4350 | return nfserr_inval; | |
4351 | ||
4352 | nfs4_lock_state(); | |
4353 | ||
9072d5c6 | 4354 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4355 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4356 | if (status) |
1da177e4 | 4357 | goto out; |
f9d7562f BF |
4358 | filp = find_any_file(stp->st_file); |
4359 | if (!filp) { | |
4360 | status = nfserr_lock_range; | |
4361 | goto out; | |
4362 | } | |
21179d81 JL |
4363 | file_lock = locks_alloc_lock(); |
4364 | if (!file_lock) { | |
4365 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4366 | status = nfserr_jukebox; | |
4367 | goto out; | |
4368 | } | |
4369 | locks_init_lock(file_lock); | |
4370 | file_lock->fl_type = F_UNLCK; | |
4371 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); | |
4372 | file_lock->fl_pid = current->tgid; | |
4373 | file_lock->fl_file = filp; | |
4374 | file_lock->fl_flags = FL_POSIX; | |
4375 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4376 | file_lock->fl_start = locku->lu_offset; | |
4377 | ||
4378 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4379 | locku->lu_length); | |
4380 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 LT |
4381 | |
4382 | /* | |
4383 | * Try to unlock the file in the VFS. | |
4384 | */ | |
21179d81 | 4385 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4386 | if (err) { |
fd85b817 | 4387 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4388 | goto out_nfserr; |
4389 | } | |
4390 | /* | |
4391 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4392 | */ | |
dcef0413 BF |
4393 | update_stateid(&stp->st_stid.sc_stateid); |
4394 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4395 | |
4396 | out: | |
71c3bcd7 BF |
4397 | if (!cstate->replay_owner) |
4398 | nfs4_unlock_state(); | |
21179d81 JL |
4399 | if (file_lock) |
4400 | locks_free_lock(file_lock); | |
1da177e4 LT |
4401 | return status; |
4402 | ||
4403 | out_nfserr: | |
b8dd7b9a | 4404 | status = nfserrno(err); |
1da177e4 LT |
4405 | goto out; |
4406 | } | |
4407 | ||
4408 | /* | |
4409 | * returns | |
4410 | * 1: locks held by lockowner | |
4411 | * 0: no locks held by lockowner | |
4412 | */ | |
4413 | static int | |
fe0750e5 | 4414 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4415 | { |
4416 | struct file_lock **flpp; | |
f9d7562f | 4417 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4418 | int status = 0; |
4419 | ||
b89f4321 | 4420 | lock_flocks(); |
1da177e4 | 4421 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4422 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4423 | status = 1; |
4424 | goto out; | |
796dadfd | 4425 | } |
1da177e4 LT |
4426 | } |
4427 | out: | |
b89f4321 | 4428 | unlock_flocks(); |
1da177e4 LT |
4429 | return status; |
4430 | } | |
4431 | ||
b37ad28b | 4432 | __be32 |
b591480b BF |
4433 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4434 | struct nfsd4_compound_state *cstate, | |
4435 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4436 | { |
4437 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4438 | struct nfs4_stateowner *sop; |
fe0750e5 | 4439 | struct nfs4_lockowner *lo; |
dcef0413 | 4440 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4441 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4442 | struct list_head matches; |
16bfdaaf | 4443 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4444 | __be32 status; |
7f2210fa | 4445 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4446 | |
4447 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4448 | clid->cl_boot, clid->cl_id); | |
4449 | ||
4450 | /* XXX check for lease expiration */ | |
4451 | ||
4452 | status = nfserr_stale_clientid; | |
2c142baa | 4453 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 4454 | return status; |
1da177e4 LT |
4455 | |
4456 | nfs4_lock_state(); | |
4457 | ||
3e9e3dbe | 4458 | status = nfserr_locks_held; |
3e9e3dbe | 4459 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4460 | |
16bfdaaf BF |
4461 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4462 | if (sop->so_is_open_owner) | |
4463 | continue; | |
06f1f864 BF |
4464 | if (!same_owner_str(sop, owner, clid)) |
4465 | continue; | |
4466 | list_for_each_entry(stp, &sop->so_stateids, | |
4467 | st_perstateowner) { | |
4468 | lo = lockowner(sop); | |
4469 | if (check_for_locks(stp->st_file, lo)) | |
4470 | goto out; | |
4471 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4472 | } |
3e9e3dbe N |
4473 | } |
4474 | /* Clients probably won't expect us to return with some (but not all) | |
4475 | * of the lockowner state released; so don't release any until all | |
4476 | * have been checked. */ | |
4477 | status = nfs_ok; | |
0fa822e4 | 4478 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4479 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4480 | lo_list); | |
0fa822e4 N |
4481 | /* unhash_stateowner deletes so_perclient only |
4482 | * for openowners. */ | |
fe0750e5 BF |
4483 | list_del(&lo->lo_list); |
4484 | release_lockowner(lo); | |
1da177e4 LT |
4485 | } |
4486 | out: | |
4487 | nfs4_unlock_state(); | |
4488 | return status; | |
4489 | } | |
4490 | ||
4491 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4492 | alloc_reclaim(void) |
1da177e4 | 4493 | { |
a55370a3 | 4494 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4495 | } |
4496 | ||
0ce0c2b5 | 4497 | bool |
52e19c09 | 4498 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4499 | { |
0ce0c2b5 | 4500 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4501 | |
52e19c09 | 4502 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4503 | return (crp && crp->cr_clp); |
c7b9a459 N |
4504 | } |
4505 | ||
1da177e4 LT |
4506 | /* |
4507 | * failure => all reset bets are off, nfserr_no_grace... | |
4508 | */ | |
772a9bbb | 4509 | struct nfs4_client_reclaim * |
52e19c09 | 4510 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4511 | { |
4512 | unsigned int strhashval; | |
772a9bbb | 4513 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4514 | |
a55370a3 N |
4515 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4516 | crp = alloc_reclaim(); | |
772a9bbb JL |
4517 | if (crp) { |
4518 | strhashval = clientstr_hashval(name); | |
4519 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4520 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4521 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4522 | crp->cr_clp = NULL; |
52e19c09 | 4523 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4524 | } |
4525 | return crp; | |
1da177e4 LT |
4526 | } |
4527 | ||
ce30e539 | 4528 | void |
52e19c09 | 4529 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4530 | { |
4531 | list_del(&crp->cr_strhash); | |
4532 | kfree(crp); | |
52e19c09 | 4533 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4534 | } |
4535 | ||
2a4317c5 | 4536 | void |
52e19c09 | 4537 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4538 | { |
4539 | struct nfs4_client_reclaim *crp = NULL; | |
4540 | int i; | |
4541 | ||
1da177e4 | 4542 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4543 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4544 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4545 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4546 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4547 | } |
4548 | } | |
52e19c09 | 4549 | BUG_ON(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4550 | } |
4551 | ||
4552 | /* | |
4553 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4554 | struct nfs4_client_reclaim * |
52e19c09 | 4555 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4556 | { |
4557 | unsigned int strhashval; | |
1da177e4 LT |
4558 | struct nfs4_client_reclaim *crp = NULL; |
4559 | ||
278c931c | 4560 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4561 | |
278c931c | 4562 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4563 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4564 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4565 | return crp; |
4566 | } | |
4567 | } | |
4568 | return NULL; | |
4569 | } | |
4570 | ||
4571 | /* | |
4572 | * Called from OPEN. Look for clientid in reclaim list. | |
4573 | */ | |
b37ad28b | 4574 | __be32 |
d15c077e | 4575 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions) |
1da177e4 | 4576 | { |
a52d726b | 4577 | struct nfs4_client *clp; |
8daae4dc | 4578 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
a52d726b JL |
4579 | |
4580 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4581 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4582 | if (clp == NULL) |
4583 | return nfserr_reclaim_bad; | |
4584 | ||
4585 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4586 | } |
4587 | ||
65178db4 BS |
4588 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4589 | ||
4590 | void nfsd_forget_clients(u64 num) | |
4591 | { | |
4592 | struct nfs4_client *clp, *next; | |
4593 | int count = 0; | |
4594 | ||
4595 | nfs4_lock_state(); | |
4596 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
65178db4 BS |
4597 | expire_client(clp); |
4598 | if (++count == num) | |
4599 | break; | |
4600 | } | |
4601 | nfs4_unlock_state(); | |
4602 | ||
4603 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4604 | } | |
4605 | ||
4606 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4607 | { | |
4608 | release_lockowner(lockowner(sop)); | |
4609 | } | |
4610 | ||
4611 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4612 | { | |
4613 | release_openowner(openowner(sop)); | |
4614 | } | |
4615 | ||
353de31b | 4616 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4617 | void (*release_sop)(struct nfs4_stateowner *)) |
4618 | { | |
4619 | int i, count = 0; | |
4620 | struct nfs4_stateowner *sop, *next; | |
4621 | ||
16bfdaaf BF |
4622 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4623 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4624 | if (sop->so_is_open_owner != is_open_owner) | |
4625 | continue; | |
65178db4 BS |
4626 | release_sop(sop); |
4627 | if (++count == num) | |
4628 | return count; | |
4629 | } | |
4630 | } | |
4631 | return count; | |
4632 | } | |
4633 | ||
4634 | void nfsd_forget_locks(u64 num) | |
4635 | { | |
4636 | int count; | |
4637 | ||
4638 | nfs4_lock_state(); | |
16bfdaaf | 4639 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4640 | nfs4_unlock_state(); |
4641 | ||
4642 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4643 | } | |
4644 | ||
4645 | void nfsd_forget_openowners(u64 num) | |
4646 | { | |
4647 | int count; | |
4648 | ||
4649 | nfs4_lock_state(); | |
16bfdaaf | 4650 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4651 | nfs4_unlock_state(); |
4652 | ||
4653 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4654 | } | |
4655 | ||
da5c80a9 | 4656 | static int nfsd_process_n_delegations(u64 num, struct list_head *list) |
65178db4 BS |
4657 | { |
4658 | int i, count = 0; | |
2d3475c0 BS |
4659 | struct nfs4_file *fp, *fnext; |
4660 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4661 | |
4662 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4663 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4664 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
a6d88f29 | 4665 | list_move(&dp->dl_recall_lru, list); |
65178db4 BS |
4666 | if (++count == num) |
4667 | return count; | |
4668 | } | |
4669 | } | |
4670 | } | |
2d3475c0 | 4671 | |
65178db4 BS |
4672 | return count; |
4673 | } | |
4674 | ||
4675 | void nfsd_forget_delegations(u64 num) | |
4676 | { | |
4677 | unsigned int count; | |
a6d88f29 SK |
4678 | LIST_HEAD(victims); |
4679 | struct nfs4_delegation *dp, *dnext; | |
4680 | ||
4681 | spin_lock(&recall_lock); | |
4682 | count = nfsd_process_n_delegations(num, &victims); | |
4683 | spin_unlock(&recall_lock); | |
65178db4 BS |
4684 | |
4685 | nfs4_lock_state(); | |
a6d88f29 SK |
4686 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) |
4687 | unhash_delegation(dp); | |
65178db4 BS |
4688 | nfs4_unlock_state(); |
4689 | ||
4690 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4691 | } | |
4692 | ||
4693 | void nfsd_recall_delegations(u64 num) | |
4694 | { | |
4695 | unsigned int count; | |
a6d88f29 SK |
4696 | LIST_HEAD(victims); |
4697 | struct nfs4_delegation *dp, *dnext; | |
65178db4 | 4698 | |
65178db4 | 4699 | spin_lock(&recall_lock); |
a6d88f29 SK |
4700 | count = nfsd_process_n_delegations(num, &victims); |
4701 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { | |
4702 | list_del(&dp->dl_recall_lru); | |
4703 | nfsd_break_one_deleg(dp); | |
4704 | } | |
65178db4 | 4705 | spin_unlock(&recall_lock); |
65178db4 BS |
4706 | |
4707 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4708 | } | |
4709 | ||
4710 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4711 | ||
ac4d8ff2 | 4712 | /* initialization to perform at module load time: */ |
1da177e4 | 4713 | |
72083396 | 4714 | void |
ac4d8ff2 | 4715 | nfs4_state_init(void) |
1da177e4 | 4716 | { |
72083396 | 4717 | int i; |
1da177e4 | 4718 | |
5282fd72 ME |
4719 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4720 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4721 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4722 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4723 | } | |
16bfdaaf BF |
4724 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4725 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4726 | } |
009673b4 BF |
4727 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4728 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4729 | INIT_LIST_HEAD(&close_lru); |
4730 | INIT_LIST_HEAD(&client_lru); | |
4731 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
4732 | } |
4733 | ||
c2f1a551 MS |
4734 | /* |
4735 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4736 | * client may quite reasonably hang on to a delegation as long as it has | |
4737 | * the inode cached. This becomes an obvious problem the first time a | |
4738 | * client's inode cache approaches the size of the server's total memory. | |
4739 | * | |
4740 | * For now we avoid this problem by imposing a hard limit on the number | |
4741 | * of delegations, which varies according to the server's memory size. | |
4742 | */ | |
4743 | static void | |
4744 | set_max_delegations(void) | |
4745 | { | |
4746 | /* | |
4747 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4748 | * estimates suggest that in the worst case (where every delegation | |
4749 | * is for a different inode), a delegation could take about 1.5K, | |
4750 | * giving a worst case usage of about 6% of memory. | |
4751 | */ | |
4752 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4753 | } | |
4754 | ||
8daae4dc SK |
4755 | static int nfs4_state_start_net(struct net *net) |
4756 | { | |
4757 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4758 | int i; | |
4759 | ||
4760 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
4761 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4762 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 4763 | goto err; |
0a7ec377 SK |
4764 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
4765 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4766 | if (!nn->unconf_id_hashtbl) | |
4767 | goto err_unconf_id; | |
8daae4dc | 4768 | |
382a62e7 | 4769 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 4770 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 4771 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 SK |
4772 | } |
4773 | nn->conf_name_tree = RB_ROOT; | |
a99454aa | 4774 | nn->unconf_name_tree = RB_ROOT; |
8daae4dc SK |
4775 | |
4776 | return 0; | |
382a62e7 | 4777 | |
0a7ec377 SK |
4778 | err_unconf_id: |
4779 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
4780 | err: |
4781 | return -ENOMEM; | |
8daae4dc SK |
4782 | } |
4783 | ||
4784 | static void | |
4785 | __nfs4_state_shutdown_net(struct net *net) | |
4786 | { | |
4787 | int i; | |
4788 | struct nfs4_client *clp = NULL; | |
4789 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
a99454aa | 4790 | struct rb_node *node, *tmp; |
8daae4dc SK |
4791 | |
4792 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
4793 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
4794 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4795 | destroy_client(clp); | |
4796 | } | |
4797 | } | |
a99454aa SK |
4798 | |
4799 | node = rb_first(&nn->unconf_name_tree); | |
4800 | while (node != NULL) { | |
4801 | tmp = node; | |
4802 | node = rb_next(tmp); | |
4803 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
4804 | rb_erase(tmp, &nn->unconf_name_tree); | |
4805 | destroy_client(clp); | |
4806 | } | |
4807 | ||
0a7ec377 | 4808 | kfree(nn->unconf_id_hashtbl); |
8daae4dc SK |
4809 | kfree(nn->conf_id_hashtbl); |
4810 | } | |
4811 | ||
ac4d8ff2 N |
4812 | /* initialization to perform when the nfsd service is started: */ |
4813 | ||
a6d6b781 JL |
4814 | int |
4815 | nfs4_state_start(void) | |
ac4d8ff2 | 4816 | { |
5e1533c7 SK |
4817 | struct net *net = &init_net; |
4818 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b5a1a81e BF |
4819 | int ret; |
4820 | ||
2a4317c5 JL |
4821 | /* |
4822 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4823 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4824 | * need to pass a net pointer into this function, take a reference | |
4825 | * to that instead and then do most of the rest of this on a per-net | |
4826 | * basis. | |
4827 | */ | |
5e1533c7 | 4828 | get_net(net); |
8daae4dc SK |
4829 | ret = nfs4_state_start_net(net); |
4830 | if (ret) | |
4831 | return ret; | |
5e1533c7 | 4832 | nfsd4_client_tracking_init(net); |
2c142baa | 4833 | nn->boot_time = get_seconds(); |
5ccb0066 | 4834 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 4835 | nn->grace_ended = false; |
9a8db97e | 4836 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4837 | nfsd4_grace); |
b5a1a81e | 4838 | ret = set_callback_cred(); |
a6d6b781 JL |
4839 | if (ret) { |
4840 | ret = -ENOMEM; | |
4841 | goto out_recovery; | |
4842 | } | |
58da282b | 4843 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4844 | if (laundry_wq == NULL) { |
4845 | ret = -ENOMEM; | |
4846 | goto out_recovery; | |
4847 | } | |
b5a1a81e BF |
4848 | ret = nfsd4_create_callback_queue(); |
4849 | if (ret) | |
4850 | goto out_free_laundry; | |
e46b498c | 4851 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4852 | set_max_delegations(); |
b5a1a81e BF |
4853 | return 0; |
4854 | out_free_laundry: | |
4855 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4856 | out_recovery: |
5e1533c7 | 4857 | nfsd4_client_tracking_exit(net); |
8daae4dc | 4858 | __nfs4_state_shutdown_net(net); |
5e1533c7 | 4859 | put_net(net); |
b5a1a81e | 4860 | return ret; |
1da177e4 LT |
4861 | } |
4862 | ||
ac55fdc4 | 4863 | /* should be called with the state lock held */ |
1da177e4 | 4864 | static void |
8daae4dc | 4865 | __nfs4_state_shutdown(struct net *net) |
1da177e4 | 4866 | { |
1da177e4 | 4867 | struct nfs4_delegation *dp = NULL; |
1da177e4 LT |
4868 | struct list_head *pos, *next, reaplist; |
4869 | ||
8daae4dc | 4870 | __nfs4_state_shutdown_net(net); |
ac55fdc4 | 4871 | |
1da177e4 LT |
4872 | INIT_LIST_HEAD(&reaplist); |
4873 | spin_lock(&recall_lock); | |
4874 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4875 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4876 | list_move(&dp->dl_recall_lru, &reaplist); | |
4877 | } | |
4878 | spin_unlock(&recall_lock); | |
4879 | list_for_each_safe(pos, next, &reaplist) { | |
4880 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4881 | unhash_delegation(dp); |
4882 | } | |
4883 | ||
2a4317c5 JL |
4884 | nfsd4_client_tracking_exit(&init_net); |
4885 | put_net(&init_net); | |
1da177e4 LT |
4886 | } |
4887 | ||
4888 | void | |
4889 | nfs4_state_shutdown(void) | |
4890 | { | |
5e1533c7 SK |
4891 | struct net *net = &init_net; |
4892 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4893 | ||
afe2c511 | 4894 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4895 | destroy_workqueue(laundry_wq); |
5e1533c7 | 4896 | locks_end_grace(&nn->nfsd4_manager); |
1da177e4 | 4897 | nfs4_lock_state(); |
8daae4dc | 4898 | __nfs4_state_shutdown(net); |
1da177e4 | 4899 | nfs4_unlock_state(); |
c3935e30 | 4900 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4901 | } |
8b70484c TM |
4902 | |
4903 | static void | |
4904 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4905 | { | |
37c593c5 TM |
4906 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4907 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4908 | } |
4909 | ||
4910 | static void | |
4911 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4912 | { | |
37c593c5 TM |
4913 | if (cstate->minorversion) { |
4914 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4915 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4916 | } | |
4917 | } | |
4918 | ||
4919 | void | |
4920 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4921 | { | |
4922 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4923 | } |
4924 | ||
62cd4a59 TM |
4925 | /* |
4926 | * functions to set current state id | |
4927 | */ | |
9428fe1a TM |
4928 | void |
4929 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4930 | { | |
4931 | put_stateid(cstate, &odp->od_stateid); | |
4932 | } | |
4933 | ||
8b70484c TM |
4934 | void |
4935 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4936 | { | |
4937 | put_stateid(cstate, &open->op_stateid); | |
4938 | } | |
4939 | ||
62cd4a59 TM |
4940 | void |
4941 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4942 | { | |
4943 | put_stateid(cstate, &close->cl_stateid); | |
4944 | } | |
4945 | ||
4946 | void | |
4947 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4948 | { | |
4949 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4950 | } | |
4951 | ||
4952 | /* | |
4953 | * functions to consume current state id | |
4954 | */ | |
1e97b519 | 4955 | |
9428fe1a TM |
4956 | void |
4957 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4958 | { | |
4959 | get_stateid(cstate, &odp->od_stateid); | |
4960 | } | |
4961 | ||
4962 | void | |
4963 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4964 | { | |
4965 | get_stateid(cstate, &drp->dr_stateid); | |
4966 | } | |
4967 | ||
1e97b519 TM |
4968 | void |
4969 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4970 | { | |
4971 | get_stateid(cstate, &fsp->fr_stateid); | |
4972 | } | |
4973 | ||
4974 | void | |
4975 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4976 | { | |
4977 | get_stateid(cstate, &setattr->sa_stateid); | |
4978 | } | |
4979 | ||
8b70484c TM |
4980 | void |
4981 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4982 | { | |
4983 | get_stateid(cstate, &close->cl_stateid); | |
4984 | } | |
4985 | ||
4986 | void | |
62cd4a59 | 4987 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4988 | { |
62cd4a59 | 4989 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4990 | } |
30813e27 TM |
4991 | |
4992 | void | |
4993 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4994 | { | |
4995 | get_stateid(cstate, &read->rd_stateid); | |
4996 | } | |
4997 | ||
4998 | void | |
4999 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5000 | { | |
5001 | get_stateid(cstate, &write->wr_stateid); | |
5002 | } |