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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
9a74af21 | 44 | #include "xdr4.h" |
0a3adade | 45 | #include "vfs.h" |
bfa4b365 | 46 | #include "current_stateid.h" |
1da177e4 | 47 | |
5e1533c7 SK |
48 | #include "netns.h" |
49 | ||
1da177e4 LT |
50 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
51 | ||
f32f3c2d BF |
52 | #define all_ones {{~0,~0},~0} |
53 | static const stateid_t one_stateid = { | |
54 | .si_generation = ~0, | |
55 | .si_opaque = all_ones, | |
56 | }; | |
57 | static const stateid_t zero_stateid = { | |
58 | /* all fields zero */ | |
59 | }; | |
19ff0f28 TM |
60 | static const stateid_t currentstateid = { |
61 | .si_generation = 1, | |
62 | }; | |
f32f3c2d | 63 | |
ec6b5d7b | 64 | static u64 current_sessionid = 1; |
fd39ca9a | 65 | |
f32f3c2d BF |
66 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
67 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 68 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 69 | |
1da177e4 | 70 | /* forward declarations */ |
fe0750e5 | 71 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 72 | |
8b671b80 BF |
73 | /* Locking: */ |
74 | ||
75 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 76 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 77 | |
8b671b80 BF |
78 | /* |
79 | * Currently used for the del_recall_lru and file hash table. In an | |
80 | * effort to decrease the scope of the client_mutex, this spinlock may | |
81 | * eventually cover more: | |
82 | */ | |
83 | static DEFINE_SPINLOCK(recall_lock); | |
84 | ||
fe0750e5 BF |
85 | static struct kmem_cache *openowner_slab = NULL; |
86 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
87 | static struct kmem_cache *file_slab = NULL; |
88 | static struct kmem_cache *stateid_slab = NULL; | |
89 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 90 | |
1da177e4 LT |
91 | void |
92 | nfs4_lock_state(void) | |
93 | { | |
353ab6e9 | 94 | mutex_lock(&client_mutex); |
1da177e4 LT |
95 | } |
96 | ||
508dc6e1 BH |
97 | static void free_session(struct kref *); |
98 | ||
99 | /* Must be called under the client_lock */ | |
100 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
101 | { | |
102 | kref_put(&ses->se_ref, free_session); | |
103 | } | |
104 | ||
105 | static void nfsd4_get_session(struct nfsd4_session *ses) | |
106 | { | |
107 | kref_get(&ses->se_ref); | |
108 | } | |
109 | ||
1da177e4 LT |
110 | void |
111 | nfs4_unlock_state(void) | |
112 | { | |
353ab6e9 | 113 | mutex_unlock(&client_mutex); |
1da177e4 LT |
114 | } |
115 | ||
116 | static inline u32 | |
117 | opaque_hashval(const void *ptr, int nbytes) | |
118 | { | |
119 | unsigned char *cptr = (unsigned char *) ptr; | |
120 | ||
121 | u32 x = 0; | |
122 | while (nbytes--) { | |
123 | x *= 37; | |
124 | x += *cptr++; | |
125 | } | |
126 | return x; | |
127 | } | |
128 | ||
1da177e4 LT |
129 | static struct list_head del_recall_lru; |
130 | ||
32513b40 BF |
131 | static void nfsd4_free_file(struct nfs4_file *f) |
132 | { | |
133 | kmem_cache_free(file_slab, f); | |
134 | } | |
135 | ||
13cd2184 N |
136 | static inline void |
137 | put_nfs4_file(struct nfs4_file *fi) | |
138 | { | |
8b671b80 BF |
139 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
140 | list_del(&fi->fi_hash); | |
141 | spin_unlock(&recall_lock); | |
142 | iput(fi->fi_inode); | |
32513b40 | 143 | nfsd4_free_file(fi); |
8b671b80 | 144 | } |
13cd2184 N |
145 | } |
146 | ||
147 | static inline void | |
148 | get_nfs4_file(struct nfs4_file *fi) | |
149 | { | |
8b671b80 | 150 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
151 | } |
152 | ||
ef0f3390 | 153 | static int num_delegations; |
697ce9be | 154 | unsigned long max_delegations; |
ef0f3390 N |
155 | |
156 | /* | |
157 | * Open owner state (share locks) | |
158 | */ | |
159 | ||
16bfdaaf BF |
160 | /* hash tables for lock and open owners */ |
161 | #define OWNER_HASH_BITS 8 | |
162 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
163 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 164 | |
16bfdaaf | 165 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
166 | { |
167 | unsigned int ret; | |
168 | ||
169 | ret = opaque_hashval(ownername->data, ownername->len); | |
170 | ret += clientid; | |
16bfdaaf | 171 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 172 | } |
ef0f3390 | 173 | |
ef0f3390 N |
174 | /* hash table for nfs4_file */ |
175 | #define FILE_HASH_BITS 8 | |
176 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 177 | |
ddc04c41 BF |
178 | static unsigned int file_hashval(struct inode *ino) |
179 | { | |
180 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
181 | return hash_ptr(ino, FILE_HASH_BITS); | |
182 | } | |
183 | ||
ef0f3390 | 184 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 185 | |
998db52c | 186 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 187 | { |
063b0fb9 | 188 | WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); |
f9d7562f BF |
189 | atomic_inc(&fp->fi_access[oflag]); |
190 | } | |
191 | ||
998db52c BF |
192 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
193 | { | |
194 | if (oflag == O_RDWR) { | |
195 | __nfs4_file_get_access(fp, O_RDONLY); | |
196 | __nfs4_file_get_access(fp, O_WRONLY); | |
197 | } else | |
198 | __nfs4_file_get_access(fp, oflag); | |
199 | } | |
200 | ||
201 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
202 | { |
203 | if (fp->fi_fds[oflag]) { | |
204 | fput(fp->fi_fds[oflag]); | |
205 | fp->fi_fds[oflag] = NULL; | |
206 | } | |
207 | } | |
208 | ||
998db52c | 209 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
210 | { |
211 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 212 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
213 | /* |
214 | * It's also safe to get rid of the RDWR open *if* | |
215 | * we no longer have need of the other kind of access | |
216 | * or if we already have the other kind of open: | |
217 | */ | |
218 | if (fp->fi_fds[1-oflag] | |
219 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
220 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
221 | } |
222 | } | |
223 | ||
998db52c BF |
224 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
225 | { | |
226 | if (oflag == O_RDWR) { | |
227 | __nfs4_file_put_access(fp, O_RDONLY); | |
228 | __nfs4_file_put_access(fp, O_WRONLY); | |
229 | } else | |
230 | __nfs4_file_put_access(fp, oflag); | |
231 | } | |
232 | ||
3abdb607 BF |
233 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
234 | kmem_cache *slab) | |
2a74aba7 | 235 | { |
3abdb607 BF |
236 | struct idr *stateids = &cl->cl_stateids; |
237 | static int min_stateid = 0; | |
238 | struct nfs4_stid *stid; | |
6136d2b4 | 239 | int new_id; |
2a74aba7 | 240 | |
3abdb607 BF |
241 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
242 | if (!stid) | |
243 | return NULL; | |
244 | ||
245 | if (!idr_pre_get(stateids, GFP_KERNEL)) | |
246 | goto out_free; | |
247 | if (idr_get_new_above(stateids, stid, min_stateid, &new_id)) | |
248 | goto out_free; | |
2a74aba7 | 249 | stid->sc_client = cl; |
3abdb607 BF |
250 | stid->sc_type = 0; |
251 | stid->sc_stateid.si_opaque.so_id = new_id; | |
252 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 253 | /* Will be incremented before return to client: */ |
3abdb607 | 254 | stid->sc_stateid.si_generation = 0; |
996e0938 | 255 | |
996e0938 | 256 | /* |
3abdb607 BF |
257 | * It shouldn't be a problem to reuse an opaque stateid value. |
258 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
259 | * example, a stray write retransmission could be accepted by | |
260 | * the server when it should have been rejected. Therefore, | |
261 | * adopt a trick from the sctp code to attempt to maximize the | |
262 | * amount of time until an id is reused, by ensuring they always | |
263 | * "increase" (mod INT_MAX): | |
996e0938 | 264 | */ |
3abdb607 BF |
265 | |
266 | min_stateid = new_id+1; | |
267 | if (min_stateid == INT_MAX) | |
268 | min_stateid = 0; | |
269 | return stid; | |
270 | out_free: | |
271 | kfree(stid); | |
272 | return NULL; | |
2a74aba7 BF |
273 | } |
274 | ||
4cdc951b BF |
275 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
276 | { | |
277 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
278 | } | |
279 | ||
1da177e4 | 280 | static struct nfs4_delegation * |
dcef0413 | 281 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
282 | { |
283 | struct nfs4_delegation *dp; | |
284 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
285 | |
286 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
287 | /* |
288 | * Major work on the lease subsystem (for example, to support | |
289 | * calbacks on stat) will be required before we can support | |
290 | * write delegations properly. | |
291 | */ | |
292 | if (type != NFS4_OPEN_DELEGATE_READ) | |
293 | return NULL; | |
47f9940c MS |
294 | if (fp->fi_had_conflict) |
295 | return NULL; | |
c2f1a551 | 296 | if (num_delegations > max_delegations) |
ef0f3390 | 297 | return NULL; |
996e0938 | 298 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 299 | if (dp == NULL) |
1da177e4 | 300 | return dp; |
3abdb607 | 301 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
2a74aba7 BF |
302 | /* |
303 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
304 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
305 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
306 | */ |
307 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 308 | num_delegations++; |
ea1da636 N |
309 | INIT_LIST_HEAD(&dp->dl_perfile); |
310 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 311 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 312 | get_nfs4_file(fp); |
1da177e4 | 313 | dp->dl_file = fp; |
1da177e4 | 314 | dp->dl_type = type; |
6c02eaa1 | 315 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
316 | dp->dl_time = 0; |
317 | atomic_set(&dp->dl_count, 1); | |
57725155 | 318 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
319 | return dp; |
320 | } | |
321 | ||
e56a3162 | 322 | static void free_stid(struct nfs4_stid *s, struct kmem_cache *slab) |
3abdb607 BF |
323 | { |
324 | struct idr *stateids = &s->sc_client->cl_stateids; | |
325 | ||
326 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
327 | kmem_cache_free(slab, s); | |
328 | } | |
329 | ||
1da177e4 LT |
330 | void |
331 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
332 | { | |
333 | if (atomic_dec_and_test(&dp->dl_count)) { | |
334 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 335 | put_nfs4_file(dp->dl_file); |
3abdb607 | 336 | free_stid(&dp->dl_stid, deleg_slab); |
ef0f3390 | 337 | num_delegations--; |
1da177e4 LT |
338 | } |
339 | } | |
340 | ||
acfdf5c3 | 341 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 342 | { |
acfdf5c3 BF |
343 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
344 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
345 | fp->fi_lease = NULL; | |
4ee63624 | 346 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
347 | fp->fi_deleg_file = NULL; |
348 | } | |
1da177e4 LT |
349 | } |
350 | ||
6136d2b4 BF |
351 | static void unhash_stid(struct nfs4_stid *s) |
352 | { | |
3abdb607 | 353 | s->sc_type = 0; |
6136d2b4 BF |
354 | } |
355 | ||
1da177e4 LT |
356 | /* Called under the state lock. */ |
357 | static void | |
358 | unhash_delegation(struct nfs4_delegation *dp) | |
359 | { | |
6136d2b4 | 360 | unhash_stid(&dp->dl_stid); |
ea1da636 | 361 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 362 | spin_lock(&recall_lock); |
5d926e8c | 363 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
364 | list_del_init(&dp->dl_recall_lru); |
365 | spin_unlock(&recall_lock); | |
acfdf5c3 | 366 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
367 | nfs4_put_delegation(dp); |
368 | } | |
369 | ||
370 | /* | |
371 | * SETCLIENTID state | |
372 | */ | |
373 | ||
ddc04c41 BF |
374 | static unsigned int clientid_hashval(u32 id) |
375 | { | |
376 | return id & CLIENT_HASH_MASK; | |
377 | } | |
378 | ||
379 | static unsigned int clientstr_hashval(const char *name) | |
380 | { | |
381 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
382 | } | |
383 | ||
f9d7562f BF |
384 | /* |
385 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
386 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
387 | * only what share bits are currently in force, but also what | |
388 | * combinations of share bits previous opens have used. This allows us | |
389 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
390 | * return an error if the client attempt to downgrade to a combination | |
391 | * of share bits not explicable by closing some of its previous opens. | |
392 | * | |
393 | * XXX: This enforcement is actually incomplete, since we don't keep | |
394 | * track of access/deny bit combinations; so, e.g., we allow: | |
395 | * | |
396 | * OPEN allow read, deny write | |
397 | * OPEN allow both, deny none | |
398 | * DOWNGRADE allow read, deny none | |
399 | * | |
400 | * which we should reject. | |
401 | */ | |
5ae037e5 JL |
402 | static unsigned int |
403 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 404 | int i; |
5ae037e5 | 405 | unsigned int access = 0; |
f9d7562f | 406 | |
f9d7562f BF |
407 | for (i = 1; i < 4; i++) { |
408 | if (test_bit(i, &bmap)) | |
5ae037e5 | 409 | access |= i; |
f9d7562f | 410 | } |
5ae037e5 | 411 | return access; |
f9d7562f BF |
412 | } |
413 | ||
3a328614 | 414 | static bool |
dcef0413 | 415 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
416 | unsigned int access, deny; |
417 | ||
5ae037e5 JL |
418 | access = bmap_to_share_mode(stp->st_access_bmap); |
419 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 420 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
421 | return false; |
422 | return true; | |
f9d7562f BF |
423 | } |
424 | ||
82c5ff1b JL |
425 | /* set share access for a given stateid */ |
426 | static inline void | |
427 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
428 | { | |
429 | __set_bit(access, &stp->st_access_bmap); | |
430 | } | |
431 | ||
432 | /* clear share access for a given stateid */ | |
433 | static inline void | |
434 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
435 | { | |
436 | __clear_bit(access, &stp->st_access_bmap); | |
437 | } | |
438 | ||
439 | /* test whether a given stateid has access */ | |
440 | static inline bool | |
441 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
442 | { | |
443 | return test_bit(access, &stp->st_access_bmap); | |
444 | } | |
445 | ||
ce0fc43c JL |
446 | /* set share deny for a given stateid */ |
447 | static inline void | |
448 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
449 | { | |
450 | __set_bit(access, &stp->st_deny_bmap); | |
451 | } | |
452 | ||
453 | /* clear share deny for a given stateid */ | |
454 | static inline void | |
455 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
456 | { | |
457 | __clear_bit(access, &stp->st_deny_bmap); | |
458 | } | |
459 | ||
460 | /* test whether a given stateid is denying specific access */ | |
461 | static inline bool | |
462 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
463 | { | |
464 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
465 | } |
466 | ||
467 | static int nfs4_access_to_omode(u32 access) | |
468 | { | |
8f34a430 | 469 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
470 | case NFS4_SHARE_ACCESS_READ: |
471 | return O_RDONLY; | |
472 | case NFS4_SHARE_ACCESS_WRITE: | |
473 | return O_WRONLY; | |
474 | case NFS4_SHARE_ACCESS_BOTH: | |
475 | return O_RDWR; | |
476 | } | |
063b0fb9 BF |
477 | WARN_ON_ONCE(1); |
478 | return O_RDONLY; | |
f9d7562f BF |
479 | } |
480 | ||
82c5ff1b JL |
481 | /* release all access and file references for a given stateid */ |
482 | static void | |
483 | release_all_access(struct nfs4_ol_stateid *stp) | |
484 | { | |
485 | int i; | |
486 | ||
487 | for (i = 1; i < 4; i++) { | |
488 | if (test_access(i, stp)) | |
489 | nfs4_file_put_access(stp->st_file, | |
490 | nfs4_access_to_omode(i)); | |
491 | clear_access(i, stp); | |
492 | } | |
493 | } | |
494 | ||
dcef0413 | 495 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 496 | { |
529d7b2a BF |
497 | list_del(&stp->st_perfile); |
498 | list_del(&stp->st_perstateowner); | |
499 | } | |
500 | ||
dcef0413 | 501 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 502 | { |
82c5ff1b | 503 | release_all_access(stp); |
a96e5b90 | 504 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
505 | stp->st_file = NULL; |
506 | } | |
507 | ||
dcef0413 | 508 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 509 | { |
3abdb607 | 510 | free_stid(&stp->st_stid, stateid_slab); |
529d7b2a BF |
511 | } |
512 | ||
dcef0413 | 513 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
514 | { |
515 | struct file *file; | |
516 | ||
517 | unhash_generic_stateid(stp); | |
6136d2b4 | 518 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
519 | file = find_any_file(stp->st_file); |
520 | if (file) | |
fe0750e5 | 521 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 522 | close_generic_stateid(stp); |
529d7b2a BF |
523 | free_generic_stateid(stp); |
524 | } | |
525 | ||
fe0750e5 | 526 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 527 | { |
dcef0413 | 528 | struct nfs4_ol_stateid *stp; |
529d7b2a | 529 | |
fe0750e5 BF |
530 | list_del(&lo->lo_owner.so_strhash); |
531 | list_del(&lo->lo_perstateid); | |
009673b4 | 532 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
533 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
534 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 535 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
536 | release_lock_stateid(stp); |
537 | } | |
538 | } | |
539 | ||
fe0750e5 | 540 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 541 | { |
fe0750e5 BF |
542 | unhash_lockowner(lo); |
543 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
544 | } |
545 | ||
546 | static void | |
dcef0413 | 547 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 548 | { |
fe0750e5 | 549 | struct nfs4_lockowner *lo; |
529d7b2a BF |
550 | |
551 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
552 | lo = list_entry(open_stp->st_lockowners.next, |
553 | struct nfs4_lockowner, lo_perstateid); | |
554 | release_lockowner(lo); | |
529d7b2a BF |
555 | } |
556 | } | |
557 | ||
38c387b5 | 558 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
559 | { |
560 | unhash_generic_stateid(stp); | |
561 | release_stateid_lockowners(stp); | |
38c387b5 BF |
562 | close_generic_stateid(stp); |
563 | } | |
564 | ||
565 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
566 | { | |
567 | unhash_open_stateid(stp); | |
6136d2b4 | 568 | unhash_stid(&stp->st_stid); |
2283963f BF |
569 | free_generic_stateid(stp); |
570 | } | |
571 | ||
fe0750e5 | 572 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 573 | { |
dcef0413 | 574 | struct nfs4_ol_stateid *stp; |
f1d110ca | 575 | |
fe0750e5 BF |
576 | list_del(&oo->oo_owner.so_strhash); |
577 | list_del(&oo->oo_perclient); | |
578 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
579 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 580 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 581 | release_open_stateid(stp); |
f1d110ca BF |
582 | } |
583 | } | |
584 | ||
f7a4d872 BF |
585 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
586 | { | |
587 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
588 | ||
589 | if (s) { | |
6136d2b4 | 590 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
591 | free_generic_stateid(s); |
592 | oo->oo_last_closed_stid = NULL; | |
593 | } | |
594 | } | |
595 | ||
fe0750e5 | 596 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 597 | { |
fe0750e5 BF |
598 | unhash_openowner(oo); |
599 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 600 | release_last_closed_stateid(oo); |
fe0750e5 | 601 | nfs4_free_openowner(oo); |
f1d110ca BF |
602 | } |
603 | ||
5282fd72 ME |
604 | static inline int |
605 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
606 | { | |
607 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
608 | ||
609 | return sid->sequence % SESSION_HASH_SIZE; | |
610 | } | |
611 | ||
8f199b82 | 612 | #ifdef NFSD_DEBUG |
5282fd72 ME |
613 | static inline void |
614 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
615 | { | |
616 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
617 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
618 | } | |
8f199b82 TM |
619 | #else |
620 | static inline void | |
621 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
622 | { | |
623 | } | |
624 | #endif | |
625 | ||
5282fd72 | 626 | |
ec6b5d7b AA |
627 | static void |
628 | gen_sessionid(struct nfsd4_session *ses) | |
629 | { | |
630 | struct nfs4_client *clp = ses->se_client; | |
631 | struct nfsd4_sessionid *sid; | |
632 | ||
633 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
634 | sid->clientid = clp->cl_clientid; | |
635 | sid->sequence = current_sessionid++; | |
636 | sid->reserved = 0; | |
637 | } | |
638 | ||
639 | /* | |
a649637c AA |
640 | * The protocol defines ca_maxresponssize_cached to include the size of |
641 | * the rpc header, but all we need to cache is the data starting after | |
642 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
643 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
644 | * value that is the number of bytes in our cache plus a few additional | |
645 | * bytes. In order to stay on the safe side, and not promise more than | |
646 | * we can cache, those additional bytes must be the minimum possible: 24 | |
647 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
648 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
649 | * for the SEQUENCE op response: | |
650 | */ | |
651 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
652 | ||
557ce264 AA |
653 | static void |
654 | free_session_slots(struct nfsd4_session *ses) | |
655 | { | |
656 | int i; | |
657 | ||
658 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
659 | kfree(ses->se_slots[i]); | |
660 | } | |
661 | ||
a649637c | 662 | /* |
efe0cb6d BF |
663 | * We don't actually need to cache the rpc and session headers, so we |
664 | * can allocate a little less for each slot: | |
665 | */ | |
666 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
667 | { | |
668 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
669 | } | |
670 | ||
5b6feee9 | 671 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 672 | { |
5b6feee9 BF |
673 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
674 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 675 | |
5b6feee9 BF |
676 | return size; |
677 | } | |
ec6b5d7b | 678 | |
5b6feee9 BF |
679 | /* |
680 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 681 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 682 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 683 | */ |
5b6feee9 | 684 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 685 | { |
5b6feee9 | 686 | int avail; |
ec6b5d7b | 687 | |
5b6feee9 | 688 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 689 | |
5b6feee9 | 690 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
691 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
692 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
693 | num = min_t(int, num, avail / slotsize); |
694 | nfsd_drc_mem_used += num * slotsize; | |
695 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 696 | |
5b6feee9 BF |
697 | return num; |
698 | } | |
ec6b5d7b | 699 | |
5b6feee9 BF |
700 | static void nfsd4_put_drc_mem(int slotsize, int num) |
701 | { | |
4bd9b0f4 | 702 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 703 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 704 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 705 | } |
ec6b5d7b | 706 | |
a827bcb2 | 707 | static struct nfsd4_session *__alloc_session(int slotsize, int numslots) |
5b6feee9 BF |
708 | { |
709 | struct nfsd4_session *new; | |
710 | int mem, i; | |
a649637c | 711 | |
5b6feee9 BF |
712 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
713 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
714 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 715 | |
5b6feee9 BF |
716 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
717 | if (!new) | |
718 | return NULL; | |
557ce264 | 719 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
720 | for (i = 0; i < numslots; i++) { |
721 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
722 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
723 | if (!new->se_slots[i]) | |
557ce264 | 724 | goto out_free; |
557ce264 | 725 | } |
5b6feee9 BF |
726 | return new; |
727 | out_free: | |
728 | while (i--) | |
729 | kfree(new->se_slots[i]); | |
730 | kfree(new); | |
731 | return NULL; | |
ec6b5d7b AA |
732 | } |
733 | ||
9dd9845f SK |
734 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, |
735 | struct nfsd4_channel_attrs *req, | |
736 | int numslots, int slotsize, | |
737 | struct nfsd_net *nn) | |
ec6b5d7b | 738 | { |
9dd9845f | 739 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
ec6b5d7b | 740 | |
5b6feee9 | 741 | new->maxreqs = numslots; |
d2b21743 MJ |
742 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
743 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
744 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
745 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
746 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
747 | } | |
ec6b5d7b | 748 | |
19cf5c02 BF |
749 | static void free_conn(struct nfsd4_conn *c) |
750 | { | |
751 | svc_xprt_put(c->cn_xprt); | |
752 | kfree(c); | |
753 | } | |
ec6b5d7b | 754 | |
19cf5c02 BF |
755 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
756 | { | |
757 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
758 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 759 | |
19cf5c02 BF |
760 | spin_lock(&clp->cl_lock); |
761 | if (!list_empty(&c->cn_persession)) { | |
762 | list_del(&c->cn_persession); | |
763 | free_conn(c); | |
764 | } | |
765 | spin_unlock(&clp->cl_lock); | |
eea49806 | 766 | nfsd4_probe_callback(clp); |
19cf5c02 | 767 | } |
ec6b5d7b | 768 | |
d29c374c | 769 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 770 | { |
c7662518 | 771 | struct nfsd4_conn *conn; |
ec6b5d7b | 772 | |
c7662518 BF |
773 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
774 | if (!conn) | |
db90681d | 775 | return NULL; |
c7662518 BF |
776 | svc_xprt_get(rqstp->rq_xprt); |
777 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 778 | conn->cn_flags = flags; |
db90681d BF |
779 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
780 | return conn; | |
781 | } | |
a649637c | 782 | |
328ead28 BF |
783 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
784 | { | |
785 | conn->cn_session = ses; | |
786 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
787 | } |
788 | ||
db90681d | 789 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 790 | { |
db90681d | 791 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 792 | |
c7662518 | 793 | spin_lock(&clp->cl_lock); |
328ead28 | 794 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 795 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
796 | } |
797 | ||
21b75b01 | 798 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 799 | { |
19cf5c02 | 800 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 801 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
802 | } |
803 | ||
e1ff371f | 804 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 805 | { |
21b75b01 | 806 | int ret; |
ec6b5d7b | 807 | |
db90681d | 808 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
809 | ret = nfsd4_register_conn(conn); |
810 | if (ret) | |
811 | /* oops; xprt is already down: */ | |
812 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 813 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
814 | /* callback channel may be back up */ |
815 | nfsd4_probe_callback(ses->se_client); | |
816 | } | |
c7662518 | 817 | } |
ec6b5d7b | 818 | |
e1ff371f | 819 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
820 | { |
821 | u32 dir = NFS4_CDFC4_FORE; | |
822 | ||
e1ff371f | 823 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 824 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 825 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
826 | } |
827 | ||
828 | /* must be called under client_lock */ | |
19cf5c02 | 829 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 830 | { |
19cf5c02 BF |
831 | struct nfs4_client *clp = s->se_client; |
832 | struct nfsd4_conn *c; | |
ec6b5d7b | 833 | |
19cf5c02 BF |
834 | spin_lock(&clp->cl_lock); |
835 | while (!list_empty(&s->se_conns)) { | |
836 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
837 | list_del_init(&c->cn_persession); | |
838 | spin_unlock(&clp->cl_lock); | |
557ce264 | 839 | |
19cf5c02 BF |
840 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
841 | free_conn(c); | |
ec6b5d7b | 842 | |
19cf5c02 BF |
843 | spin_lock(&clp->cl_lock); |
844 | } | |
845 | spin_unlock(&clp->cl_lock); | |
c7662518 | 846 | } |
ec6b5d7b | 847 | |
1377b69e BF |
848 | static void __free_session(struct nfsd4_session *ses) |
849 | { | |
850 | nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); | |
851 | free_session_slots(ses); | |
852 | kfree(ses); | |
853 | } | |
854 | ||
508dc6e1 | 855 | static void free_session(struct kref *kref) |
c7662518 BF |
856 | { |
857 | struct nfsd4_session *ses; | |
c9a49628 | 858 | struct nfsd_net *nn; |
c7662518 BF |
859 | |
860 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
c9a49628 SK |
861 | nn = net_generic(ses->se_client->net, nfsd_net_id); |
862 | ||
863 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 864 | nfsd4_del_conns(ses); |
1377b69e | 865 | __free_session(ses); |
c7662518 BF |
866 | } |
867 | ||
508dc6e1 BH |
868 | void nfsd4_put_session(struct nfsd4_session *ses) |
869 | { | |
c9a49628 SK |
870 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
871 | ||
872 | spin_lock(&nn->client_lock); | |
508dc6e1 | 873 | nfsd4_put_session_locked(ses); |
c9a49628 | 874 | spin_unlock(&nn->client_lock); |
508dc6e1 BH |
875 | } |
876 | ||
9dd9845f SK |
877 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan, |
878 | struct nfsd_net *nn) | |
5b6feee9 BF |
879 | { |
880 | struct nfsd4_session *new; | |
5b6feee9 | 881 | int numslots, slotsize; |
5b6feee9 BF |
882 | /* |
883 | * Note decreasing slot size below client's request may | |
884 | * make it difficult for client to function correctly, whereas | |
885 | * decreasing the number of slots will (just?) affect | |
886 | * performance. When short on memory we therefore prefer to | |
887 | * decrease number of slots instead of their size. | |
888 | */ | |
889 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
890 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
891 | if (numslots < 1) |
892 | return NULL; | |
5b6feee9 | 893 | |
a827bcb2 | 894 | new = __alloc_session(slotsize, numslots); |
5b6feee9 | 895 | if (!new) { |
74b70dde | 896 | nfsd4_put_drc_mem(slotsize, numslots); |
ac7c46f2 | 897 | return NULL; |
557ce264 | 898 | } |
9dd9845f | 899 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize, nn); |
a827bcb2 BF |
900 | return new; |
901 | } | |
557ce264 | 902 | |
135ae827 | 903 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 904 | { |
a827bcb2 | 905 | int idx; |
1872de0e | 906 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 907 | |
ec6b5d7b AA |
908 | new->se_client = clp; |
909 | gen_sessionid(new); | |
ec6b5d7b | 910 | |
c7662518 BF |
911 | INIT_LIST_HEAD(&new->se_conns); |
912 | ||
ac7c46f2 | 913 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 914 | new->se_flags = cses->flags; |
8b5ce5cd | 915 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 916 | new->se_cb_sec = cses->cb_sec; |
ec6b5d7b | 917 | kref_init(&new->se_ref); |
5b6feee9 | 918 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 919 | spin_lock(&nn->client_lock); |
1872de0e | 920 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 921 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 922 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 923 | spin_unlock(&clp->cl_lock); |
c9a49628 | 924 | spin_unlock(&nn->client_lock); |
ec6b5d7b | 925 | |
dcbeaa68 | 926 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 927 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
928 | /* |
929 | * This is a little silly; with sessions there's no real | |
930 | * use for the callback address. Use the peer address | |
931 | * as a reasonable default for now, but consider fixing | |
932 | * the rpc client not to require an address in the | |
933 | * future: | |
934 | */ | |
edd76786 BF |
935 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
936 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 937 | } |
ec6b5d7b AA |
938 | } |
939 | ||
9089f1b4 | 940 | /* caller must hold client_lock */ |
5282fd72 | 941 | static struct nfsd4_session * |
1872de0e | 942 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
943 | { |
944 | struct nfsd4_session *elem; | |
945 | int idx; | |
1872de0e | 946 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
947 | |
948 | dump_sessionid(__func__, sessionid); | |
949 | idx = hash_sessionid(sessionid); | |
5282fd72 | 950 | /* Search in the appropriate list */ |
1872de0e | 951 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
952 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
953 | NFS4_MAX_SESSIONID_LEN)) { | |
954 | return elem; | |
955 | } | |
956 | } | |
957 | ||
958 | dprintk("%s: session not found\n", __func__); | |
959 | return NULL; | |
960 | } | |
961 | ||
9089f1b4 | 962 | /* caller must hold client_lock */ |
7116ed6b | 963 | static void |
5282fd72 | 964 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
965 | { |
966 | list_del(&ses->se_hash); | |
4c649378 | 967 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 968 | list_del(&ses->se_perclnt); |
4c649378 | 969 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
970 | } |
971 | ||
36acb66b | 972 | /* must be called under the client_lock */ |
1da177e4 | 973 | static inline void |
36acb66b | 974 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 975 | { |
5ed58bb2 SK |
976 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
977 | ||
07cd4909 | 978 | if (is_client_expired(clp)) { |
7447758b BF |
979 | WARN_ON(1); |
980 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
07cd4909 BH |
981 | __func__, |
982 | clp->cl_clientid.cl_boot, | |
983 | clp->cl_clientid.cl_id); | |
984 | return; | |
985 | } | |
986 | ||
1da177e4 LT |
987 | dprintk("renewing client (clientid %08x/%08x)\n", |
988 | clp->cl_clientid.cl_boot, | |
989 | clp->cl_clientid.cl_id); | |
5ed58bb2 | 990 | list_move_tail(&clp->cl_lru, &nn->client_lru); |
1da177e4 LT |
991 | clp->cl_time = get_seconds(); |
992 | } | |
993 | ||
36acb66b BH |
994 | static inline void |
995 | renew_client(struct nfs4_client *clp) | |
996 | { | |
c9a49628 SK |
997 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
998 | ||
999 | spin_lock(&nn->client_lock); | |
36acb66b | 1000 | renew_client_locked(clp); |
c9a49628 | 1001 | spin_unlock(&nn->client_lock); |
36acb66b BH |
1002 | } |
1003 | ||
1da177e4 LT |
1004 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1005 | static int | |
2c142baa | 1006 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1007 | { |
2c142baa | 1008 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1009 | return 0; |
60adfc50 | 1010 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1011 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1012 | return 1; |
1013 | } | |
1014 | ||
1015 | /* | |
1016 | * XXX Should we use a slab cache ? | |
1017 | * This type of memory management is somewhat inefficient, but we use it | |
1018 | * anyway since SETCLIENTID is not a common operation. | |
1019 | */ | |
35bba9a3 | 1020 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1021 | { |
1022 | struct nfs4_client *clp; | |
1023 | ||
35bba9a3 BF |
1024 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1025 | if (clp == NULL) | |
1026 | return NULL; | |
67114fe6 | 1027 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1028 | if (clp->cl_name.data == NULL) { |
1029 | kfree(clp); | |
1030 | return NULL; | |
1da177e4 | 1031 | } |
35bba9a3 | 1032 | clp->cl_name.len = name.len; |
1da177e4 LT |
1033 | return clp; |
1034 | } | |
1035 | ||
1036 | static inline void | |
1037 | free_client(struct nfs4_client *clp) | |
1038 | { | |
bca0ec65 | 1039 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1040 | |
1041 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1042 | while (!list_empty(&clp->cl_sessions)) { |
1043 | struct nfsd4_session *ses; | |
1044 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1045 | se_perclnt); | |
1046 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1047 | nfsd4_put_session_locked(ses); |
792c95dd | 1048 | } |
03a4e1f6 | 1049 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1050 | kfree(clp->cl_name.data); |
2d32b29a | 1051 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1052 | kfree(clp); |
1053 | } | |
1054 | ||
d7682988 BH |
1055 | void |
1056 | release_session_client(struct nfsd4_session *session) | |
1057 | { | |
1058 | struct nfs4_client *clp = session->se_client; | |
c9a49628 | 1059 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
d7682988 | 1060 | |
c9a49628 | 1061 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
d7682988 BH |
1062 | return; |
1063 | if (is_client_expired(clp)) { | |
1064 | free_client(clp); | |
1065 | session->se_client = NULL; | |
1066 | } else | |
1067 | renew_client_locked(clp); | |
c9a49628 | 1068 | spin_unlock(&nn->client_lock); |
d7682988 BH |
1069 | } |
1070 | ||
84d38ac9 BH |
1071 | /* must be called under the client_lock */ |
1072 | static inline void | |
1073 | unhash_client_locked(struct nfs4_client *clp) | |
1074 | { | |
792c95dd BF |
1075 | struct nfsd4_session *ses; |
1076 | ||
07cd4909 | 1077 | mark_client_expired(clp); |
84d38ac9 | 1078 | list_del(&clp->cl_lru); |
4c649378 | 1079 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1080 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1081 | list_del_init(&ses->se_hash); | |
4c649378 | 1082 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1083 | } |
1084 | ||
1da177e4 | 1085 | static void |
0d22f68f | 1086 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1087 | { |
fe0750e5 | 1088 | struct nfs4_openowner *oo; |
1da177e4 | 1089 | struct nfs4_delegation *dp; |
1da177e4 | 1090 | struct list_head reaplist; |
382a62e7 | 1091 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1092 | |
1da177e4 LT |
1093 | INIT_LIST_HEAD(&reaplist); |
1094 | spin_lock(&recall_lock); | |
ea1da636 N |
1095 | while (!list_empty(&clp->cl_delegations)) { |
1096 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1097 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1098 | list_move(&dp->dl_recall_lru, &reaplist); |
1099 | } | |
1100 | spin_unlock(&recall_lock); | |
1101 | while (!list_empty(&reaplist)) { | |
1102 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1103 | unhash_delegation(dp); |
1104 | } | |
ea1da636 | 1105 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1106 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1107 | release_openowner(oo); | |
1da177e4 | 1108 | } |
6ff8da08 | 1109 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1110 | if (clp->cl_cb_conn.cb_xprt) |
1111 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1112 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1113 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1114 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1115 | else |
a99454aa | 1116 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1117 | spin_lock(&nn->client_lock); |
84d38ac9 | 1118 | unhash_client_locked(clp); |
46583e25 BH |
1119 | if (atomic_read(&clp->cl_refcount) == 0) |
1120 | free_client(clp); | |
c9a49628 | 1121 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1122 | } |
1123 | ||
0d22f68f BF |
1124 | static void expire_client(struct nfs4_client *clp) |
1125 | { | |
1126 | nfsd4_client_record_remove(clp); | |
1127 | destroy_client(clp); | |
1128 | } | |
1129 | ||
35bba9a3 BF |
1130 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1131 | { | |
1132 | memcpy(target->cl_verifier.data, source->data, | |
1133 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1134 | } |
1135 | ||
35bba9a3 BF |
1136 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1137 | { | |
1da177e4 LT |
1138 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1139 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1140 | } | |
1141 | ||
03a4e1f6 | 1142 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1143 | { |
03a4e1f6 BF |
1144 | if (source->cr_principal) { |
1145 | target->cr_principal = | |
1146 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1147 | if (target->cr_principal == NULL) | |
1148 | return -ENOMEM; | |
1149 | } else | |
1150 | target->cr_principal = NULL; | |
d5497fc6 | 1151 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1152 | target->cr_uid = source->cr_uid; |
1153 | target->cr_gid = source->cr_gid; | |
1154 | target->cr_group_info = source->cr_group_info; | |
1155 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1156 | return 0; |
1da177e4 LT |
1157 | } |
1158 | ||
ac55fdc4 JL |
1159 | static long long |
1160 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1161 | { | |
1162 | long long res; | |
1163 | ||
1164 | res = o1->len - o2->len; | |
1165 | if (res) | |
1166 | return res; | |
1167 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1168 | } | |
1169 | ||
35bba9a3 | 1170 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1171 | { |
a55370a3 | 1172 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1173 | } |
1174 | ||
1175 | static int | |
599e0a22 BF |
1176 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1177 | { | |
1178 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1179 | } |
1180 | ||
1181 | static int | |
599e0a22 BF |
1182 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1183 | { | |
1184 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1185 | } |
1186 | ||
8fbba96e BF |
1187 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1188 | { | |
1189 | int i; | |
1190 | ||
1191 | if (g1->ngroups != g2->ngroups) | |
1192 | return false; | |
1193 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1194 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1195 | return false; |
1196 | return true; | |
1197 | } | |
1198 | ||
68eb3508 BF |
1199 | /* |
1200 | * RFC 3530 language requires clid_inuse be returned when the | |
1201 | * "principal" associated with a requests differs from that previously | |
1202 | * used. We use uid, gid's, and gss principal string as our best | |
1203 | * approximation. We also don't want to allow non-gss use of a client | |
1204 | * established using gss: in theory cr_principal should catch that | |
1205 | * change, but in practice cr_principal can be null even in the gss case | |
1206 | * since gssd doesn't always pass down a principal string. | |
1207 | */ | |
1208 | static bool is_gss_cred(struct svc_cred *cr) | |
1209 | { | |
1210 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1211 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1212 | } | |
1213 | ||
1214 | ||
5559b50a | 1215 | static bool |
599e0a22 BF |
1216 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1217 | { | |
68eb3508 | 1218 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1219 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1220 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1221 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1222 | return false; | |
1223 | if (cr1->cr_principal == cr2->cr_principal) | |
1224 | return true; | |
1225 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1226 | return false; | |
5559b50a | 1227 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1228 | } |
1229 | ||
c212cecf | 1230 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1231 | { |
1232 | static u32 current_clientid = 1; | |
1233 | ||
2c142baa | 1234 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1235 | clp->cl_clientid.cl_id = current_clientid++; |
1236 | } | |
1237 | ||
deda2faa BF |
1238 | static void gen_confirm(struct nfs4_client *clp) |
1239 | { | |
ab4684d1 | 1240 | __be32 verf[2]; |
deda2faa | 1241 | static u32 i; |
1da177e4 | 1242 | |
ab4684d1 CL |
1243 | verf[0] = (__be32)get_seconds(); |
1244 | verf[1] = (__be32)i++; | |
1245 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1246 | } |
1247 | ||
38c2f4b1 | 1248 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1249 | { |
3abdb607 BF |
1250 | struct nfs4_stid *ret; |
1251 | ||
1252 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1253 | if (!ret || !ret->sc_type) | |
1254 | return NULL; | |
1255 | return ret; | |
4d71ab87 BF |
1256 | } |
1257 | ||
38c2f4b1 | 1258 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1259 | { |
1260 | struct nfs4_stid *s; | |
4d71ab87 | 1261 | |
38c2f4b1 | 1262 | s = find_stateid(cl, t); |
4d71ab87 BF |
1263 | if (!s) |
1264 | return NULL; | |
f459e453 | 1265 | if (typemask & s->sc_type) |
4581d140 | 1266 | return s; |
4581d140 BF |
1267 | return NULL; |
1268 | } | |
1269 | ||
2216d449 | 1270 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1271 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1272 | { | |
1273 | struct nfs4_client *clp; | |
1274 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1275 | int ret; |
c212cecf | 1276 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1277 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1278 | |
1279 | clp = alloc_client(name); | |
1280 | if (clp == NULL) | |
1281 | return NULL; | |
1282 | ||
792c95dd | 1283 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1284 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1285 | if (ret) { | |
c9a49628 | 1286 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1287 | free_client(clp); |
c9a49628 | 1288 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1289 | return NULL; |
b09333c4 | 1290 | } |
38c2f4b1 | 1291 | idr_init(&clp->cl_stateids); |
46583e25 | 1292 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1293 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1294 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1295 | INIT_LIST_HEAD(&clp->cl_openowners); |
1296 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1297 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1298 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1299 | spin_lock_init(&clp->cl_lock); |
57725155 | 1300 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1301 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1302 | clear_bit(0, &clp->cl_cb_slot_busy); |
1303 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1304 | copy_verf(clp, verf); | |
1305 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1306 | gen_confirm(clp); |
edd76786 | 1307 | clp->cl_cb_session = NULL; |
c212cecf | 1308 | clp->net = net; |
b09333c4 RL |
1309 | return clp; |
1310 | } | |
1311 | ||
fd39ca9a | 1312 | static void |
ac55fdc4 JL |
1313 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1314 | { | |
1315 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1316 | struct nfs4_client *clp; | |
1317 | ||
1318 | while (*new) { | |
1319 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1320 | parent = *new; | |
1321 | ||
1322 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1323 | new = &((*new)->rb_left); | |
1324 | else | |
1325 | new = &((*new)->rb_right); | |
1326 | } | |
1327 | ||
1328 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1329 | rb_insert_color(&new_clp->cl_namenode, root); | |
1330 | } | |
1331 | ||
1332 | static struct nfs4_client * | |
1333 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1334 | { | |
1335 | long long cmp; | |
1336 | struct rb_node *node = root->rb_node; | |
1337 | struct nfs4_client *clp; | |
1338 | ||
1339 | while (node) { | |
1340 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1341 | cmp = compare_blob(&clp->cl_name, name); | |
1342 | if (cmp > 0) | |
1343 | node = node->rb_left; | |
1344 | else if (cmp < 0) | |
1345 | node = node->rb_right; | |
1346 | else | |
1347 | return clp; | |
1348 | } | |
1349 | return NULL; | |
1350 | } | |
1351 | ||
1352 | static void | |
1353 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1354 | { |
1355 | unsigned int idhashval; | |
0a7ec377 | 1356 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1357 | |
ac55fdc4 | 1358 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1359 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1360 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1361 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1362 | renew_client(clp); |
1da177e4 LT |
1363 | } |
1364 | ||
fd39ca9a | 1365 | static void |
1da177e4 LT |
1366 | move_to_confirmed(struct nfs4_client *clp) |
1367 | { | |
1368 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1369 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1370 | |
1371 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1372 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1373 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1374 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1375 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1376 | renew_client(clp); |
1377 | } | |
1378 | ||
1379 | static struct nfs4_client * | |
8daae4dc | 1380 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 LT |
1381 | { |
1382 | struct nfs4_client *clp; | |
1383 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1384 | ||
8daae4dc | 1385 | list_for_each_entry(clp, &nn->conf_id_hashtbl[idhashval], cl_idhash) { |
a50d2ad1 | 1386 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1387 | if ((bool)clp->cl_minorversion != sessions) |
1388 | return NULL; | |
a50d2ad1 | 1389 | renew_client(clp); |
1da177e4 | 1390 | return clp; |
a50d2ad1 | 1391 | } |
1da177e4 LT |
1392 | } |
1393 | return NULL; | |
1394 | } | |
1395 | ||
1396 | static struct nfs4_client * | |
0a7ec377 | 1397 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 LT |
1398 | { |
1399 | struct nfs4_client *clp; | |
1400 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1401 | ||
0a7ec377 | 1402 | list_for_each_entry(clp, &nn->unconf_id_hashtbl[idhashval], cl_idhash) { |
d15c077e BF |
1403 | if (same_clid(&clp->cl_clientid, clid)) { |
1404 | if ((bool)clp->cl_minorversion != sessions) | |
1405 | return NULL; | |
1da177e4 | 1406 | return clp; |
d15c077e | 1407 | } |
1da177e4 LT |
1408 | } |
1409 | return NULL; | |
1410 | } | |
1411 | ||
6e5f15c9 | 1412 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1413 | { |
6e5f15c9 | 1414 | return clp->cl_exchange_flags != 0; |
e203d506 | 1415 | } |
a1bcecd2 | 1416 | |
28ce6054 | 1417 | static struct nfs4_client * |
382a62e7 | 1418 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1419 | { |
382a62e7 | 1420 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1421 | } |
1422 | ||
1423 | static struct nfs4_client * | |
a99454aa | 1424 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1425 | { |
a99454aa | 1426 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1427 | } |
1428 | ||
fd39ca9a | 1429 | static void |
6f3d772f | 1430 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1431 | { |
07263f1e | 1432 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1433 | struct sockaddr *sa = svc_addr(rqstp); |
1434 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1435 | unsigned short expected_family; |
1436 | ||
1437 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1438 | if (se->se_callback_netid_len == 3 && | |
1439 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1440 | expected_family = AF_INET; | |
1441 | else if (se->se_callback_netid_len == 4 && | |
1442 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1443 | expected_family = AF_INET6; | |
1444 | else | |
1da177e4 LT |
1445 | goto out_err; |
1446 | ||
c212cecf | 1447 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1448 | se->se_callback_addr_len, |
07263f1e BF |
1449 | (struct sockaddr *)&conn->cb_addr, |
1450 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1451 | |
07263f1e | 1452 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1453 | goto out_err; |
aa9a4ec7 | 1454 | |
07263f1e BF |
1455 | if (conn->cb_addr.ss_family == AF_INET6) |
1456 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1457 | |
07263f1e BF |
1458 | conn->cb_prog = se->se_callback_prog; |
1459 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1460 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1461 | return; |
1462 | out_err: | |
07263f1e BF |
1463 | conn->cb_addr.ss_family = AF_UNSPEC; |
1464 | conn->cb_addrlen = 0; | |
849823c5 | 1465 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1466 | "will not receive delegations\n", |
1467 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1468 | ||
1da177e4 LT |
1469 | return; |
1470 | } | |
1471 | ||
074fe897 | 1472 | /* |
557ce264 | 1473 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1474 | */ |
074fe897 AA |
1475 | void |
1476 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1477 | { |
557ce264 AA |
1478 | struct nfsd4_slot *slot = resp->cstate.slot; |
1479 | unsigned int base; | |
074fe897 | 1480 | |
557ce264 | 1481 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1482 | |
557ce264 AA |
1483 | slot->sl_opcnt = resp->opcnt; |
1484 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1485 | |
bf5c43c8 | 1486 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1487 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1488 | slot->sl_datalen = 0; |
bf864a31 | 1489 | return; |
074fe897 | 1490 | } |
557ce264 AA |
1491 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1492 | base = (char *)resp->cstate.datap - | |
1493 | (char *)resp->xbuf->head[0].iov_base; | |
1494 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1495 | slot->sl_datalen)) | |
1496 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1497 | return; | |
074fe897 AA |
1498 | } |
1499 | ||
1500 | /* | |
abfabf8c AA |
1501 | * Encode the replay sequence operation from the slot values. |
1502 | * If cachethis is FALSE encode the uncached rep error on the next | |
1503 | * operation which sets resp->p and increments resp->opcnt for | |
1504 | * nfs4svc_encode_compoundres. | |
074fe897 | 1505 | * |
074fe897 | 1506 | */ |
abfabf8c AA |
1507 | static __be32 |
1508 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1509 | struct nfsd4_compoundres *resp) | |
074fe897 | 1510 | { |
abfabf8c AA |
1511 | struct nfsd4_op *op; |
1512 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1513 | |
abfabf8c AA |
1514 | /* Encode the replayed sequence operation */ |
1515 | op = &args->ops[resp->opcnt - 1]; | |
1516 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1517 | |
abfabf8c | 1518 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1519 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1520 | op = &args->ops[resp->opcnt++]; |
1521 | op->status = nfserr_retry_uncached_rep; | |
1522 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1523 | } |
abfabf8c | 1524 | return op->status; |
074fe897 AA |
1525 | } |
1526 | ||
1527 | /* | |
557ce264 AA |
1528 | * The sequence operation is not cached because we can use the slot and |
1529 | * session values. | |
074fe897 AA |
1530 | */ |
1531 | __be32 | |
bf864a31 AA |
1532 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1533 | struct nfsd4_sequence *seq) | |
074fe897 | 1534 | { |
557ce264 | 1535 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1536 | __be32 status; |
1537 | ||
557ce264 | 1538 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1539 | |
abfabf8c AA |
1540 | /* Either returns 0 or nfserr_retry_uncached */ |
1541 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1542 | if (status == nfserr_retry_uncached_rep) | |
1543 | return status; | |
074fe897 | 1544 | |
557ce264 AA |
1545 | /* The sequence operation has been encoded, cstate->datap set. */ |
1546 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1547 | |
557ce264 AA |
1548 | resp->opcnt = slot->sl_opcnt; |
1549 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1550 | status = slot->sl_status; | |
074fe897 AA |
1551 | |
1552 | return status; | |
1553 | } | |
1554 | ||
0733d213 AA |
1555 | /* |
1556 | * Set the exchange_id flags returned by the server. | |
1557 | */ | |
1558 | static void | |
1559 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1560 | { | |
1561 | /* pNFS is not supported */ | |
1562 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1563 | ||
1564 | /* Referrals are supported, Migration is not. */ | |
1565 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1566 | ||
1567 | /* set the wire flags to return to client. */ | |
1568 | clid->flags = new->cl_exchange_flags; | |
1569 | } | |
1570 | ||
631fc9ea BF |
1571 | static bool client_has_state(struct nfs4_client *clp) |
1572 | { | |
1573 | /* | |
1574 | * Note clp->cl_openowners check isn't quite right: there's no | |
1575 | * need to count owners without stateid's. | |
1576 | * | |
1577 | * Also note we should probably be using this in 4.0 case too. | |
1578 | */ | |
6eccece9 BF |
1579 | return !list_empty(&clp->cl_openowners) |
1580 | || !list_empty(&clp->cl_delegations) | |
1581 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1582 | } |
1583 | ||
069b6ad4 AA |
1584 | __be32 |
1585 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1586 | struct nfsd4_compound_state *cstate, | |
1587 | struct nfsd4_exchange_id *exid) | |
1588 | { | |
0733d213 | 1589 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1590 | __be32 status; |
363168b4 | 1591 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1592 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1593 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1594 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1595 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1596 | |
363168b4 | 1597 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1598 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1599 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1600 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1601 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1602 | |
a084daf5 | 1603 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1604 | return nfserr_inval; |
1605 | ||
1606 | /* Currently only support SP4_NONE */ | |
1607 | switch (exid->spa_how) { | |
1608 | case SP4_NONE: | |
1609 | break; | |
063b0fb9 BF |
1610 | default: /* checked by xdr code */ |
1611 | WARN_ON_ONCE(1); | |
0733d213 | 1612 | case SP4_SSV: |
0733d213 AA |
1613 | case SP4_MACH_CRED: |
1614 | return nfserr_serverfault; /* no excuse :-/ */ | |
1615 | } | |
1616 | ||
2dbb269d | 1617 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1618 | nfs4_lock_state(); |
382a62e7 | 1619 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1620 | if (conf) { |
83e08fd4 BF |
1621 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1622 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1623 | ||
136e658d BF |
1624 | if (update) { |
1625 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1626 | status = nfserr_inval; |
1a308118 BF |
1627 | goto out; |
1628 | } | |
136e658d | 1629 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1630 | status = nfserr_perm; |
136e658d BF |
1631 | goto out; |
1632 | } | |
1633 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1634 | status = nfserr_not_same; |
1635 | goto out; | |
1636 | } | |
136e658d BF |
1637 | /* case 6 */ |
1638 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1639 | new = conf; | |
1640 | goto out_copy; | |
0733d213 | 1641 | } |
136e658d | 1642 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1643 | if (client_has_state(conf)) { |
1644 | status = nfserr_clid_inuse; | |
0733d213 AA |
1645 | goto out; |
1646 | } | |
1647 | expire_client(conf); | |
1648 | goto out_new; | |
1649 | } | |
136e658d | 1650 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1651 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1652 | new = conf; |
1653 | goto out_copy; | |
1654 | } | |
1655 | /* case 5, client reboot */ | |
136e658d | 1656 | goto out_new; |
6ddbbbfe MS |
1657 | } |
1658 | ||
2dbb269d | 1659 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1660 | status = nfserr_noent; |
1661 | goto out; | |
0733d213 AA |
1662 | } |
1663 | ||
a99454aa | 1664 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1665 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1666 | expire_client(unconf); |
0733d213 | 1667 | |
2dbb269d | 1668 | /* case 1 (normal case) */ |
0733d213 | 1669 | out_new: |
2216d449 | 1670 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1671 | if (new == NULL) { |
4731030d | 1672 | status = nfserr_jukebox; |
0733d213 AA |
1673 | goto out; |
1674 | } | |
c116a0af | 1675 | new->cl_minorversion = 1; |
0733d213 | 1676 | |
c212cecf | 1677 | gen_clid(new, nn); |
ac55fdc4 | 1678 | add_to_unconfirmed(new); |
0733d213 AA |
1679 | out_copy: |
1680 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1681 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1682 | ||
778df3f0 | 1683 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1684 | nfsd4_set_ex_flags(new, exid); |
1685 | ||
1686 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1687 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1688 | status = nfs_ok; |
1689 | ||
1690 | out: | |
1691 | nfs4_unlock_state(); | |
0733d213 | 1692 | return status; |
069b6ad4 AA |
1693 | } |
1694 | ||
57b7b43b | 1695 | static __be32 |
88e588d5 | 1696 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1697 | { |
88e588d5 AA |
1698 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1699 | slot_seqid); | |
b85d4c01 BH |
1700 | |
1701 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1702 | if (slot_inuse) { |
1703 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1704 | return nfserr_jukebox; |
1705 | else | |
1706 | return nfserr_seq_misordered; | |
1707 | } | |
f6d82485 | 1708 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1709 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1710 | return nfs_ok; |
88e588d5 | 1711 | if (seqid == slot_seqid) |
b85d4c01 | 1712 | return nfserr_replay_cache; |
b85d4c01 BH |
1713 | return nfserr_seq_misordered; |
1714 | } | |
1715 | ||
49557cc7 AA |
1716 | /* |
1717 | * Cache the create session result into the create session single DRC | |
1718 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1719 | * Do this for solo or embedded create session operations. | |
1720 | */ | |
1721 | static void | |
1722 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1723 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1724 | { |
1725 | slot->sl_status = nfserr; | |
1726 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1727 | } | |
1728 | ||
1729 | static __be32 | |
1730 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1731 | struct nfsd4_clid_slot *slot) | |
1732 | { | |
1733 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1734 | return slot->sl_status; | |
1735 | } | |
1736 | ||
1b74c25b MJ |
1737 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1738 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1739 | 1 + /* MIN tag is length with zero, only length */ \ | |
1740 | 3 + /* version, opcount, opcode */ \ | |
1741 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1742 | /* seqid, slotID, slotID, cache */ \ | |
1743 | 4 ) * sizeof(__be32)) | |
1744 | ||
1745 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1746 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1747 | 1 + /* status */ \ | |
1748 | 1 + /* MIN tag is length with zero, only length */ \ | |
1749 | 3 + /* opcount, opcode, opstatus*/ \ | |
1750 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1751 | /* seqid, slotID, slotID, slotID, status */ \ | |
1752 | 5 ) * sizeof(__be32)) | |
1753 | ||
57b7b43b | 1754 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1755 | { |
1756 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1757 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1758 | } | |
1759 | ||
069b6ad4 AA |
1760 | __be32 |
1761 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1762 | struct nfsd4_compound_state *cstate, | |
1763 | struct nfsd4_create_session *cr_ses) | |
1764 | { | |
363168b4 | 1765 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1766 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1767 | struct nfsd4_session *new; |
81f0b2a4 | 1768 | struct nfsd4_conn *conn; |
49557cc7 | 1769 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1770 | __be32 status = 0; |
8daae4dc | 1771 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 1772 | |
a62573dc MJ |
1773 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1774 | return nfserr_inval; | |
49730501 BF |
1775 | if (check_forechannel_attrs(cr_ses->fore_channel)) |
1776 | return nfserr_toosmall; | |
9dd9845f | 1777 | new = alloc_session(&cr_ses->fore_channel, nn); |
81f0b2a4 BF |
1778 | if (!new) |
1779 | return nfserr_jukebox; | |
1780 | status = nfserr_jukebox; | |
1781 | conn = alloc_conn_from_crses(rqstp, cr_ses); | |
1782 | if (!conn) | |
1783 | goto out_free_session; | |
a62573dc | 1784 | |
ec6b5d7b | 1785 | nfs4_lock_state(); |
0a7ec377 | 1786 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 1787 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
ec6b5d7b AA |
1788 | |
1789 | if (conf) { | |
49557cc7 AA |
1790 | cs_slot = &conf->cl_cs_slot; |
1791 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1792 | if (status == nfserr_replay_cache) { |
49557cc7 | 1793 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1794 | goto out_free_conn; |
49557cc7 | 1795 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1796 | status = nfserr_seq_misordered; |
81f0b2a4 | 1797 | goto out_free_conn; |
ec6b5d7b | 1798 | } |
ec6b5d7b | 1799 | } else if (unconf) { |
8f9d3d3b | 1800 | struct nfs4_client *old; |
ec6b5d7b | 1801 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1802 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1803 | status = nfserr_clid_inuse; |
81f0b2a4 | 1804 | goto out_free_conn; |
ec6b5d7b | 1805 | } |
49557cc7 AA |
1806 | cs_slot = &unconf->cl_cs_slot; |
1807 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1808 | if (status) { |
1809 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1810 | status = nfserr_seq_misordered; |
81f0b2a4 | 1811 | goto out_free_conn; |
ec6b5d7b | 1812 | } |
382a62e7 | 1813 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
8f9d3d3b BF |
1814 | if (old) |
1815 | expire_client(old); | |
1816 | move_to_confirmed(unconf); | |
ec6b5d7b AA |
1817 | conf = unconf; |
1818 | } else { | |
1819 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1820 | goto out_free_conn; |
ec6b5d7b | 1821 | } |
81f0b2a4 | 1822 | status = nfs_ok; |
408b79bc BF |
1823 | /* |
1824 | * We do not support RDMA or persistent sessions | |
1825 | */ | |
1826 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1827 | cr_ses->flags &= ~SESSION4_RDMA; | |
1828 | ||
81f0b2a4 BF |
1829 | init_session(rqstp, new, conf, cr_ses); |
1830 | nfsd4_init_conn(rqstp, conn, new); | |
1831 | ||
ac7c46f2 | 1832 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1833 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1834 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1835 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1836 | cs_slot->sl_seqid++; |
49557cc7 | 1837 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1838 | |
49557cc7 AA |
1839 | /* cache solo and embedded create sessions under the state lock */ |
1840 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 1841 | nfs4_unlock_state(); |
266533c6 | 1842 | out: |
ec6b5d7b AA |
1843 | dprintk("%s returns %d\n", __func__, ntohl(status)); |
1844 | return status; | |
81f0b2a4 | 1845 | out_free_conn: |
266533c6 | 1846 | nfs4_unlock_state(); |
81f0b2a4 BF |
1847 | free_conn(conn); |
1848 | out_free_session: | |
1849 | __free_session(new); | |
1850 | goto out; | |
069b6ad4 AA |
1851 | } |
1852 | ||
1d1bc8f2 BF |
1853 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1854 | { | |
1855 | switch (*dir) { | |
1856 | case NFS4_CDFC4_FORE: | |
1857 | case NFS4_CDFC4_BACK: | |
1858 | return nfs_ok; | |
1859 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1860 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1861 | *dir = NFS4_CDFC4_BOTH; | |
1862 | return nfs_ok; | |
1863 | }; | |
1864 | return nfserr_inval; | |
1865 | } | |
1866 | ||
cb73a9f4 BF |
1867 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
1868 | { | |
1869 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 1870 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
cb73a9f4 | 1871 | |
c9a49628 | 1872 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
1873 | session->se_cb_prog = bc->bc_cb_program; |
1874 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 1875 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
1876 | |
1877 | nfsd4_probe_callback(session->se_client); | |
1878 | ||
1879 | return nfs_ok; | |
1880 | } | |
1881 | ||
1d1bc8f2 BF |
1882 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
1883 | struct nfsd4_compound_state *cstate, | |
1884 | struct nfsd4_bind_conn_to_session *bcts) | |
1885 | { | |
1886 | __be32 status; | |
3ba63671 | 1887 | struct nfsd4_conn *conn; |
c9a49628 | 1888 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1d1bc8f2 BF |
1889 | |
1890 | if (!nfsd4_last_compound_op(rqstp)) | |
1891 | return nfserr_not_only_op; | |
c9a49628 | 1892 | spin_lock(&nn->client_lock); |
1872de0e | 1893 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
1d1bc8f2 BF |
1894 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires |
1895 | * client_lock iself: */ | |
1896 | if (cstate->session) { | |
1897 | nfsd4_get_session(cstate->session); | |
1898 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1899 | } | |
c9a49628 | 1900 | spin_unlock(&nn->client_lock); |
1d1bc8f2 BF |
1901 | if (!cstate->session) |
1902 | return nfserr_badsession; | |
1903 | ||
1904 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
3ba63671 BF |
1905 | if (status) |
1906 | return status; | |
1907 | conn = alloc_conn(rqstp, bcts->dir); | |
1908 | if (!conn) | |
1909 | return nfserr_jukebox; | |
e1ff371f | 1910 | nfsd4_init_conn(rqstp, conn, cstate->session); |
3ba63671 | 1911 | return nfs_ok; |
1d1bc8f2 BF |
1912 | } |
1913 | ||
5d4cec2f BF |
1914 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1915 | { | |
1916 | if (!session) | |
1917 | return 0; | |
1918 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1919 | } | |
1920 | ||
069b6ad4 AA |
1921 | __be32 |
1922 | nfsd4_destroy_session(struct svc_rqst *r, | |
1923 | struct nfsd4_compound_state *cstate, | |
1924 | struct nfsd4_destroy_session *sessionid) | |
1925 | { | |
e10e0cfc | 1926 | struct nfsd4_session *ses; |
57b7b43b | 1927 | __be32 status = nfserr_badsession; |
c9a49628 | 1928 | struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); |
e10e0cfc BH |
1929 | |
1930 | /* Notes: | |
1931 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1932 | * - Should we return nfserr_back_chan_busy if waiting for | |
1933 | * callbacks on to-be-destroyed session? | |
1934 | * - Do we need to clear any callback info from previous session? | |
1935 | */ | |
1936 | ||
5d4cec2f | 1937 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1938 | if (!nfsd4_last_compound_op(r)) |
1939 | return nfserr_not_only_op; | |
1940 | } | |
e10e0cfc | 1941 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 1942 | spin_lock(&nn->client_lock); |
1872de0e | 1943 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
e10e0cfc | 1944 | if (!ses) { |
c9a49628 | 1945 | spin_unlock(&nn->client_lock); |
e10e0cfc BH |
1946 | goto out; |
1947 | } | |
1948 | ||
1949 | unhash_session(ses); | |
c9a49628 | 1950 | spin_unlock(&nn->client_lock); |
e10e0cfc | 1951 | |
ab707e15 | 1952 | nfs4_lock_state(); |
84f5f7cc | 1953 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1954 | nfs4_unlock_state(); |
19cf5c02 | 1955 | |
c9a49628 | 1956 | spin_lock(&nn->client_lock); |
19cf5c02 | 1957 | nfsd4_del_conns(ses); |
508dc6e1 | 1958 | nfsd4_put_session_locked(ses); |
c9a49628 | 1959 | spin_unlock(&nn->client_lock); |
e10e0cfc BH |
1960 | status = nfs_ok; |
1961 | out: | |
1962 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1963 | return status; | |
069b6ad4 AA |
1964 | } |
1965 | ||
a663bdd8 | 1966 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1967 | { |
1968 | struct nfsd4_conn *c; | |
1969 | ||
1970 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1971 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1972 | return c; |
1973 | } | |
1974 | } | |
1975 | return NULL; | |
1976 | } | |
1977 | ||
a663bdd8 | 1978 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1979 | { |
1980 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1981 | struct nfsd4_conn *c; |
21b75b01 | 1982 | int ret; |
328ead28 BF |
1983 | |
1984 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1985 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1986 | if (c) { |
1987 | spin_unlock(&clp->cl_lock); | |
1988 | free_conn(new); | |
1989 | return; | |
1990 | } | |
1991 | __nfsd4_hash_conn(new, ses); | |
1992 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1993 | ret = nfsd4_register_conn(new); |
1994 | if (ret) | |
1995 | /* oops; xprt is already down: */ | |
1996 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1997 | return; |
1998 | } | |
1999 | ||
868b89c3 MJ |
2000 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2001 | { | |
2002 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2003 | ||
2004 | return args->opcnt > session->se_fchannel.maxops; | |
2005 | } | |
2006 | ||
ae82a8d0 MJ |
2007 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2008 | struct nfsd4_session *session) | |
2009 | { | |
2010 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2011 | ||
2012 | return xb->len > session->se_fchannel.maxreq_sz; | |
2013 | } | |
2014 | ||
069b6ad4 | 2015 | __be32 |
b85d4c01 | 2016 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2017 | struct nfsd4_compound_state *cstate, |
2018 | struct nfsd4_sequence *seq) | |
2019 | { | |
f9bb94c4 | 2020 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
2021 | struct nfsd4_session *session; |
2022 | struct nfsd4_slot *slot; | |
a663bdd8 | 2023 | struct nfsd4_conn *conn; |
57b7b43b | 2024 | __be32 status; |
c9a49628 | 2025 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b85d4c01 | 2026 | |
f9bb94c4 AA |
2027 | if (resp->opcnt != 1) |
2028 | return nfserr_sequence_pos; | |
2029 | ||
a663bdd8 BF |
2030 | /* |
2031 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2032 | * below. | |
2033 | */ | |
2034 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2035 | if (!conn) | |
2036 | return nfserr_jukebox; | |
2037 | ||
c9a49628 | 2038 | spin_lock(&nn->client_lock); |
b85d4c01 | 2039 | status = nfserr_badsession; |
1872de0e | 2040 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
b85d4c01 BH |
2041 | if (!session) |
2042 | goto out; | |
2043 | ||
868b89c3 MJ |
2044 | status = nfserr_too_many_ops; |
2045 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
2046 | goto out; | |
2047 | ||
ae82a8d0 MJ |
2048 | status = nfserr_req_too_big; |
2049 | if (nfsd4_request_too_big(rqstp, session)) | |
2050 | goto out; | |
2051 | ||
b85d4c01 | 2052 | status = nfserr_badslot; |
6c18ba9f | 2053 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
2054 | goto out; |
2055 | ||
557ce264 | 2056 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2057 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2058 | ||
a8dfdaeb AA |
2059 | /* We do not negotiate the number of slots yet, so set the |
2060 | * maxslots to the session maxreqs which is used to encode | |
2061 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2062 | seq->maxslots = session->se_fchannel.maxreqs; | |
2063 | ||
73e79482 BF |
2064 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2065 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2066 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2067 | status = nfserr_seq_misordered; |
2068 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
2069 | goto out; | |
b85d4c01 BH |
2070 | cstate->slot = slot; |
2071 | cstate->session = session; | |
da3846a2 | 2072 | /* Return the cached reply status and set cstate->status |
557ce264 | 2073 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2074 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2075 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2076 | goto out; |
b85d4c01 BH |
2077 | } |
2078 | if (status) | |
2079 | goto out; | |
2080 | ||
a663bdd8 BF |
2081 | nfsd4_sequence_check_conn(conn, session); |
2082 | conn = NULL; | |
328ead28 | 2083 | |
b85d4c01 | 2084 | /* Success! bump slot seqid */ |
b85d4c01 | 2085 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2086 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2087 | if (seq->cachethis) |
2088 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2089 | else |
2090 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2091 | |
2092 | cstate->slot = slot; | |
2093 | cstate->session = session; | |
2094 | ||
b85d4c01 | 2095 | out: |
26c0c75e | 2096 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2097 | if (cstate->session) { |
0d7bb719 BF |
2098 | struct nfs4_client *clp = session->se_client; |
2099 | ||
36acb66b | 2100 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2101 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2102 | switch (clp->cl_cb_state) { |
2103 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2104 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2105 | break; |
2106 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2107 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2108 | break; |
fc0c3dd1 BH |
2109 | default: |
2110 | seq->status_flags = 0; | |
5423732a | 2111 | } |
aaf84eb9 | 2112 | } |
a663bdd8 | 2113 | kfree(conn); |
c9a49628 | 2114 | spin_unlock(&nn->client_lock); |
b85d4c01 BH |
2115 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2116 | return status; | |
069b6ad4 AA |
2117 | } |
2118 | ||
345c2842 MJ |
2119 | __be32 |
2120 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2121 | { | |
2122 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2123 | __be32 status = 0; |
8daae4dc | 2124 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2125 | |
2126 | nfs4_lock_state(); | |
0a7ec377 | 2127 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2128 | conf = find_confirmed_client(&dc->clientid, true, nn); |
345c2842 MJ |
2129 | |
2130 | if (conf) { | |
2131 | clp = conf; | |
2132 | ||
6eccece9 | 2133 | if (!is_client_expired(conf) && client_has_state(conf)) { |
345c2842 MJ |
2134 | status = nfserr_clientid_busy; |
2135 | goto out; | |
2136 | } | |
2137 | ||
2138 | /* rfc5661 18.50.3 */ | |
2139 | if (cstate->session && conf == cstate->session->se_client) { | |
2140 | status = nfserr_clientid_busy; | |
2141 | goto out; | |
2142 | } | |
2143 | } else if (unconf) | |
2144 | clp = unconf; | |
2145 | else { | |
2146 | status = nfserr_stale_clientid; | |
2147 | goto out; | |
2148 | } | |
2149 | ||
2150 | expire_client(clp); | |
2151 | out: | |
2152 | nfs4_unlock_state(); | |
2153 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2154 | return status; | |
2155 | } | |
2156 | ||
4dc6ec00 BF |
2157 | __be32 |
2158 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2159 | { | |
57b7b43b | 2160 | __be32 status = 0; |
bcecf1cc | 2161 | |
4dc6ec00 BF |
2162 | if (rc->rca_one_fs) { |
2163 | if (!cstate->current_fh.fh_dentry) | |
2164 | return nfserr_nofilehandle; | |
2165 | /* | |
2166 | * We don't take advantage of the rca_one_fs case. | |
2167 | * That's OK, it's optional, we can safely ignore it. | |
2168 | */ | |
2169 | return nfs_ok; | |
2170 | } | |
bcecf1cc | 2171 | |
4dc6ec00 | 2172 | nfs4_lock_state(); |
bcecf1cc | 2173 | status = nfserr_complete_already; |
a52d726b JL |
2174 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2175 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2176 | goto out; |
2177 | ||
2178 | status = nfserr_stale_clientid; | |
2179 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2180 | /* |
2181 | * The following error isn't really legal. | |
2182 | * But we only get here if the client just explicitly | |
2183 | * destroyed the client. Surely it no longer cares what | |
2184 | * error it gets back on an operation for the dead | |
2185 | * client. | |
2186 | */ | |
bcecf1cc MJ |
2187 | goto out; |
2188 | ||
2189 | status = nfs_ok; | |
2a4317c5 | 2190 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2191 | out: |
4dc6ec00 | 2192 | nfs4_unlock_state(); |
bcecf1cc | 2193 | return status; |
4dc6ec00 BF |
2194 | } |
2195 | ||
b37ad28b | 2196 | __be32 |
b591480b BF |
2197 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2198 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2199 | { |
a084daf5 | 2200 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2201 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2202 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2203 | __be32 status; |
c212cecf SK |
2204 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2205 | ||
63db4632 | 2206 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2207 | nfs4_lock_state(); |
382a62e7 | 2208 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2209 | if (conf) { |
63db4632 | 2210 | /* case 0: */ |
1da177e4 | 2211 | status = nfserr_clid_inuse; |
e203d506 BF |
2212 | if (clp_used_exchangeid(conf)) |
2213 | goto out; | |
026722c2 | 2214 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2215 | char addr_str[INET6_ADDRSTRLEN]; |
2216 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2217 | sizeof(addr_str)); | |
2218 | dprintk("NFSD: setclientid: string in use by client " | |
2219 | "at %s\n", addr_str); | |
1da177e4 LT |
2220 | goto out; |
2221 | } | |
1da177e4 | 2222 | } |
a99454aa | 2223 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2224 | if (unconf) |
2225 | expire_client(unconf); | |
3e772463 | 2226 | status = nfserr_jukebox; |
2216d449 | 2227 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2228 | if (new == NULL) |
2229 | goto out; | |
34b232bb | 2230 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2231 | /* case 1: probable callback update */ |
1da177e4 | 2232 | copy_clid(new, conf); |
34b232bb | 2233 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2234 | gen_clid(new, nn); |
8323c3b2 | 2235 | new->cl_minorversion = 0; |
6f3d772f | 2236 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2237 | add_to_unconfirmed(new); |
1da177e4 LT |
2238 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2239 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2240 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2241 | status = nfs_ok; | |
2242 | out: | |
2243 | nfs4_unlock_state(); | |
2244 | return status; | |
2245 | } | |
2246 | ||
2247 | ||
b37ad28b | 2248 | __be32 |
b591480b BF |
2249 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2250 | struct nfsd4_compound_state *cstate, | |
2251 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2252 | { |
21ab45a4 | 2253 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2254 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2255 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2256 | __be32 status; |
7f2210fa | 2257 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2258 | |
2c142baa | 2259 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2260 | return nfserr_stale_clientid; |
1da177e4 | 2261 | nfs4_lock_state(); |
21ab45a4 | 2262 | |
8daae4dc | 2263 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2264 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2265 | /* |
8695b90a BF |
2266 | * We try hard to give out unique clientid's, so if we get an |
2267 | * attempt to confirm the same clientid with a different cred, | |
2268 | * there's a bug somewhere. Let's charitably assume it's our | |
2269 | * bug. | |
a186e767 | 2270 | */ |
8695b90a BF |
2271 | status = nfserr_serverfault; |
2272 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2273 | goto out; | |
2274 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2275 | goto out; | |
63db4632 | 2276 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2277 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2278 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2279 | status = nfs_ok; |
90d700b7 BF |
2280 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2281 | status = nfserr_stale_clientid; | |
2282 | goto out; | |
2283 | } | |
2284 | status = nfs_ok; | |
2285 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2286 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2287 | nfsd4_probe_callback(conf); | |
2288 | expire_client(unconf); | |
90d700b7 | 2289 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2290 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
0d22f68f | 2291 | if (conf) |
8695b90a | 2292 | expire_client(conf); |
8695b90a | 2293 | move_to_confirmed(unconf); |
f3d03b92 | 2294 | nfsd4_probe_callback(unconf); |
08e8987c | 2295 | } |
1da177e4 | 2296 | out: |
1da177e4 LT |
2297 | nfs4_unlock_state(); |
2298 | return status; | |
2299 | } | |
2300 | ||
32513b40 BF |
2301 | static struct nfs4_file *nfsd4_alloc_file(void) |
2302 | { | |
2303 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2304 | } | |
2305 | ||
1da177e4 | 2306 | /* OPEN Share state helper functions */ |
32513b40 | 2307 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2308 | { |
1da177e4 LT |
2309 | unsigned int hashval = file_hashval(ino); |
2310 | ||
32513b40 BF |
2311 | atomic_set(&fp->fi_ref, 1); |
2312 | INIT_LIST_HEAD(&fp->fi_hash); | |
2313 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2314 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2315 | fp->fi_inode = igrab(ino); | |
2316 | fp->fi_had_conflict = false; | |
2317 | fp->fi_lease = NULL; | |
2318 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2319 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2320 | spin_lock(&recall_lock); | |
2321 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2322 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2323 | } |
2324 | ||
e60d4398 | 2325 | static void |
e18b890b | 2326 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2327 | { |
e60d4398 N |
2328 | if (*slab == NULL) |
2329 | return; | |
1a1d92c1 | 2330 | kmem_cache_destroy(*slab); |
e60d4398 | 2331 | *slab = NULL; |
1da177e4 LT |
2332 | } |
2333 | ||
e8ff2a84 | 2334 | void |
1da177e4 LT |
2335 | nfsd4_free_slabs(void) |
2336 | { | |
fe0750e5 BF |
2337 | nfsd4_free_slab(&openowner_slab); |
2338 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2339 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2340 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2341 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2342 | } |
1da177e4 | 2343 | |
72083396 | 2344 | int |
e60d4398 N |
2345 | nfsd4_init_slabs(void) |
2346 | { | |
fe0750e5 BF |
2347 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2348 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2349 | if (openowner_slab == NULL) | |
2350 | goto out_nomem; | |
2351 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2352 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2353 | if (lockowner_slab == NULL) |
e60d4398 N |
2354 | goto out_nomem; |
2355 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2356 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2357 | if (file_slab == NULL) |
2358 | goto out_nomem; | |
5ac049ac | 2359 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2360 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2361 | if (stateid_slab == NULL) |
2362 | goto out_nomem; | |
5b2d21c1 | 2363 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2364 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2365 | if (deleg_slab == NULL) |
2366 | goto out_nomem; | |
e60d4398 N |
2367 | return 0; |
2368 | out_nomem: | |
2369 | nfsd4_free_slabs(); | |
2370 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2371 | return -ENOMEM; | |
1da177e4 LT |
2372 | } |
2373 | ||
fe0750e5 BF |
2374 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2375 | { | |
2376 | kfree(oo->oo_owner.so_owner.data); | |
2377 | kmem_cache_free(openowner_slab, oo); | |
2378 | } | |
2379 | ||
2380 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2381 | { |
fe0750e5 BF |
2382 | kfree(lo->lo_owner.so_owner.data); |
2383 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2384 | } |
2385 | ||
ff194bd9 | 2386 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2387 | { |
ff194bd9 BF |
2388 | rp->rp_status = nfserr_serverfault; |
2389 | rp->rp_buflen = 0; | |
2390 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2391 | } |
2392 | ||
fe0750e5 | 2393 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2394 | { |
1da177e4 | 2395 | struct nfs4_stateowner *sop; |
1da177e4 | 2396 | |
fe0750e5 | 2397 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2398 | if (!sop) |
2399 | return NULL; | |
2400 | ||
2401 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2402 | if (!sop->so_owner.data) { | |
fe0750e5 | 2403 | kmem_cache_free(slab, sop); |
1da177e4 | 2404 | return NULL; |
ff194bd9 BF |
2405 | } |
2406 | sop->so_owner.len = owner->len; | |
2407 | ||
ea1da636 | 2408 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2409 | sop->so_client = clp; |
2410 | init_nfs4_replay(&sop->so_replay); | |
2411 | return sop; | |
2412 | } | |
2413 | ||
fe0750e5 | 2414 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2415 | { |
9b531137 SK |
2416 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2417 | ||
2418 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2419 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2420 | } |
2421 | ||
fe0750e5 | 2422 | static struct nfs4_openowner * |
ff194bd9 | 2423 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2424 | struct nfs4_openowner *oo; |
ff194bd9 | 2425 | |
fe0750e5 BF |
2426 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2427 | if (!oo) | |
ff194bd9 | 2428 | return NULL; |
fe0750e5 BF |
2429 | oo->oo_owner.so_is_open_owner = 1; |
2430 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2431 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2432 | oo->oo_time = 0; |
38c387b5 | 2433 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2434 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2435 | hash_openowner(oo, clp, strhashval); | |
2436 | return oo; | |
1da177e4 LT |
2437 | } |
2438 | ||
996e0938 | 2439 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2440 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2441 | |
3abdb607 | 2442 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
ea1da636 | 2443 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2444 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2445 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2446 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2447 | get_nfs4_file(fp); |
1da177e4 | 2448 | stp->st_file = fp; |
1da177e4 LT |
2449 | stp->st_access_bmap = 0; |
2450 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2451 | set_access(open->op_share_access, stp); |
ce0fc43c | 2452 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2453 | stp->st_openstp = NULL; |
1da177e4 LT |
2454 | } |
2455 | ||
fd39ca9a | 2456 | static void |
73758fed | 2457 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2458 | { |
73758fed SK |
2459 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2460 | ||
fe0750e5 | 2461 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2462 | |
73758fed | 2463 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2464 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2465 | } |
2466 | ||
1da177e4 | 2467 | static int |
599e0a22 BF |
2468 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2469 | clientid_t *clid) | |
2470 | { | |
2471 | return (sop->so_owner.len == owner->len) && | |
2472 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2473 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2474 | } |
2475 | ||
fe0750e5 | 2476 | static struct nfs4_openowner * |
9b531137 SK |
2477 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2478 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2479 | { |
a50d2ad1 BF |
2480 | struct nfs4_stateowner *so; |
2481 | struct nfs4_openowner *oo; | |
d15c077e | 2482 | struct nfs4_client *clp; |
1da177e4 | 2483 | |
9b531137 | 2484 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2485 | if (!so->so_is_open_owner) |
2486 | continue; | |
a50d2ad1 BF |
2487 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2488 | oo = openowner(so); | |
d15c077e BF |
2489 | clp = oo->oo_owner.so_client; |
2490 | if ((bool)clp->cl_minorversion != sessions) | |
2491 | return NULL; | |
a50d2ad1 BF |
2492 | renew_client(oo->oo_owner.so_client); |
2493 | return oo; | |
2494 | } | |
1da177e4 LT |
2495 | } |
2496 | return NULL; | |
2497 | } | |
2498 | ||
2499 | /* search file_hashtbl[] for file */ | |
2500 | static struct nfs4_file * | |
2501 | find_file(struct inode *ino) | |
2502 | { | |
2503 | unsigned int hashval = file_hashval(ino); | |
2504 | struct nfs4_file *fp; | |
2505 | ||
8b671b80 | 2506 | spin_lock(&recall_lock); |
1da177e4 | 2507 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2508 | if (fp->fi_inode == ino) { |
2509 | get_nfs4_file(fp); | |
8b671b80 | 2510 | spin_unlock(&recall_lock); |
1da177e4 | 2511 | return fp; |
13cd2184 | 2512 | } |
1da177e4 | 2513 | } |
8b671b80 | 2514 | spin_unlock(&recall_lock); |
1da177e4 LT |
2515 | return NULL; |
2516 | } | |
2517 | ||
1da177e4 LT |
2518 | /* |
2519 | * Called to check deny when READ with all zero stateid or | |
2520 | * WRITE with all zero or all one stateid | |
2521 | */ | |
b37ad28b | 2522 | static __be32 |
1da177e4 LT |
2523 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2524 | { | |
2525 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2526 | struct nfs4_file *fp; | |
dcef0413 | 2527 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2528 | __be32 ret; |
1da177e4 LT |
2529 | |
2530 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2531 | ||
2532 | fp = find_file(ino); | |
13cd2184 N |
2533 | if (!fp) |
2534 | return nfs_ok; | |
b700949b | 2535 | ret = nfserr_locked; |
1da177e4 | 2536 | /* Search for conflicting share reservations */ |
13cd2184 | 2537 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2538 | if (test_deny(deny_type, stp) || |
2539 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2540 | goto out; |
1da177e4 | 2541 | } |
13cd2184 N |
2542 | ret = nfs_ok; |
2543 | out: | |
2544 | put_nfs4_file(fp); | |
2545 | return ret; | |
1da177e4 LT |
2546 | } |
2547 | ||
6b57d9c8 | 2548 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2549 | { |
1da177e4 LT |
2550 | /* We're assuming the state code never drops its reference |
2551 | * without first removing the lease. Since we're in this lease | |
2552 | * callback (and since the lease code is serialized by the kernel | |
2553 | * lock) we know the server hasn't removed the lease yet, we know | |
2554 | * it's safe to take a reference: */ | |
2555 | atomic_inc(&dp->dl_count); | |
2556 | ||
1da177e4 | 2557 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2558 | |
460781b5 | 2559 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2560 | dp->dl_time = get_seconds(); |
2561 | ||
6b57d9c8 BF |
2562 | nfsd4_cb_recall(dp); |
2563 | } | |
2564 | ||
acfdf5c3 | 2565 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2566 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2567 | { | |
acfdf5c3 BF |
2568 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2569 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2570 | |
7fa10cd1 BF |
2571 | if (!fp) { |
2572 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2573 | return; | |
2574 | } | |
2575 | if (fp->fi_had_conflict) { | |
2576 | WARN(1, "duplicate break on %p\n", fp); | |
2577 | return; | |
2578 | } | |
0272e1fd BF |
2579 | /* |
2580 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2581 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2582 | * in time: |
0272e1fd BF |
2583 | */ |
2584 | fl->fl_break_time = 0; | |
1da177e4 | 2585 | |
5d926e8c | 2586 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2587 | fp->fi_had_conflict = true; |
2588 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2589 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2590 | spin_unlock(&recall_lock); |
1da177e4 LT |
2591 | } |
2592 | ||
1da177e4 LT |
2593 | static |
2594 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2595 | { | |
2596 | if (arg & F_UNLCK) | |
2597 | return lease_modify(onlist, arg); | |
2598 | else | |
2599 | return -EAGAIN; | |
2600 | } | |
2601 | ||
7b021967 | 2602 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2603 | .lm_break = nfsd_break_deleg_cb, |
2604 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2605 | }; |
2606 | ||
7a8711c9 BF |
2607 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2608 | { | |
2609 | if (nfsd4_has_session(cstate)) | |
2610 | return nfs_ok; | |
2611 | if (seqid == so->so_seqid - 1) | |
2612 | return nfserr_replay_me; | |
2613 | if (seqid == so->so_seqid) | |
2614 | return nfs_ok; | |
2615 | return nfserr_bad_seqid; | |
2616 | } | |
1da177e4 | 2617 | |
b37ad28b | 2618 | __be32 |
6668958f | 2619 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 2620 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 2621 | { |
1da177e4 LT |
2622 | clientid_t *clientid = &open->op_clientid; |
2623 | struct nfs4_client *clp = NULL; | |
2624 | unsigned int strhashval; | |
fe0750e5 | 2625 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2626 | __be32 status; |
1da177e4 | 2627 | |
2c142baa | 2628 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2629 | return nfserr_stale_clientid; |
32513b40 BF |
2630 | /* |
2631 | * In case we need it later, after we've already created the | |
2632 | * file and don't want to risk a further failure: | |
2633 | */ | |
2634 | open->op_file = nfsd4_alloc_file(); | |
2635 | if (open->op_file == NULL) | |
2636 | return nfserr_jukebox; | |
1da177e4 | 2637 | |
16bfdaaf | 2638 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 2639 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
2640 | open->op_openowner = oo; |
2641 | if (!oo) { | |
8daae4dc SK |
2642 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2643 | nn); | |
1da177e4 | 2644 | if (clp == NULL) |
0f442aa2 | 2645 | return nfserr_expired; |
bcf130f9 | 2646 | goto new_owner; |
1da177e4 | 2647 | } |
dad1c067 | 2648 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2649 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2650 | clp = oo->oo_owner.so_client; |
2651 | release_openowner(oo); | |
2652 | open->op_openowner = NULL; | |
bcf130f9 | 2653 | goto new_owner; |
0f442aa2 | 2654 | } |
4cdc951b BF |
2655 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2656 | if (status) | |
2657 | return status; | |
2658 | clp = oo->oo_owner.so_client; | |
2659 | goto alloc_stateid; | |
bcf130f9 BF |
2660 | new_owner: |
2661 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2662 | if (oo == NULL) | |
2663 | return nfserr_jukebox; | |
2664 | open->op_openowner = oo; | |
4cdc951b BF |
2665 | alloc_stateid: |
2666 | open->op_stp = nfs4_alloc_stateid(clp); | |
2667 | if (!open->op_stp) | |
2668 | return nfserr_jukebox; | |
0f442aa2 | 2669 | return nfs_ok; |
1da177e4 LT |
2670 | } |
2671 | ||
b37ad28b | 2672 | static inline __be32 |
4a6e43e6 N |
2673 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2674 | { | |
2675 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2676 | return nfserr_openmode; | |
2677 | else | |
2678 | return nfs_ok; | |
2679 | } | |
2680 | ||
f459e453 | 2681 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2682 | { |
f459e453 | 2683 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2684 | } |
2685 | ||
38c2f4b1 | 2686 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2687 | { |
f459e453 | 2688 | struct nfs4_stid *ret; |
24a0111e | 2689 | |
38c2f4b1 | 2690 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2691 | if (!ret) |
2692 | return NULL; | |
2693 | return delegstateid(ret); | |
24a0111e BF |
2694 | } |
2695 | ||
8b289b2c BF |
2696 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2697 | { | |
2698 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2699 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2700 | } | |
2701 | ||
b37ad28b | 2702 | static __be32 |
38c2f4b1 | 2703 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2704 | struct nfs4_delegation **dp) |
2705 | { | |
2706 | int flags; | |
b37ad28b | 2707 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2708 | |
38c2f4b1 | 2709 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2710 | if (*dp == NULL) |
c44c5eeb | 2711 | goto out; |
24a0111e | 2712 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2713 | status = nfs4_check_delegmode(*dp, flags); |
2714 | if (status) | |
2715 | *dp = NULL; | |
c44c5eeb | 2716 | out: |
8b289b2c | 2717 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2718 | return nfs_ok; |
2719 | if (status) | |
2720 | return status; | |
dad1c067 | 2721 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2722 | return nfs_ok; |
567d9829 N |
2723 | } |
2724 | ||
b37ad28b | 2725 | static __be32 |
dcef0413 | 2726 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2727 | { |
dcef0413 | 2728 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2729 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2730 | |
8beefa24 | 2731 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2732 | /* ignore lock owners */ |
2733 | if (local->st_stateowner->so_is_open_owner == 0) | |
2734 | continue; | |
2735 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2736 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2737 | *stpp = local; |
2738 | /* check for conflicting share reservations */ | |
2739 | if (!test_share(local, open)) | |
77eaae8d | 2740 | return nfserr_share_denied; |
1da177e4 | 2741 | } |
77eaae8d | 2742 | return nfs_ok; |
1da177e4 LT |
2743 | } |
2744 | ||
21fb4016 BF |
2745 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2746 | { | |
2747 | int flags = 0; | |
2748 | ||
2749 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2750 | flags |= NFSD_MAY_READ; | |
2751 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2752 | flags |= NFSD_MAY_WRITE; | |
2753 | return flags; | |
2754 | } | |
2755 | ||
0c12eaff CB |
2756 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2757 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2758 | { |
2759 | __be32 status; | |
0c12eaff CB |
2760 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2761 | int access = nfs4_access_to_access(open->op_share_access); | |
2762 | ||
f9d7562f BF |
2763 | if (!fp->fi_fds[oflag]) { |
2764 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2765 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2766 | if (status) |
2767 | return status; | |
2768 | } | |
2769 | nfs4_file_get_access(fp, oflag); | |
2770 | ||
2771 | return nfs_ok; | |
2772 | } | |
2773 | ||
b37ad28b | 2774 | static inline __be32 |
1da177e4 LT |
2775 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2776 | struct nfsd4_open *open) | |
2777 | { | |
2778 | struct iattr iattr = { | |
2779 | .ia_valid = ATTR_SIZE, | |
2780 | .ia_size = 0, | |
2781 | }; | |
2782 | if (!open->op_truncate) | |
2783 | return 0; | |
2784 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2785 | return nfserr_inval; |
1da177e4 LT |
2786 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2787 | } | |
2788 | ||
b37ad28b | 2789 | static __be32 |
dcef0413 | 2790 | 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 | 2791 | { |
b6d2f1ca | 2792 | u32 op_share_access = open->op_share_access; |
7d947842 | 2793 | bool new_access; |
b37ad28b | 2794 | __be32 status; |
1da177e4 | 2795 | |
82c5ff1b | 2796 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2797 | if (new_access) { |
0c12eaff | 2798 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2799 | if (status) |
2800 | return status; | |
6c26d08f | 2801 | } |
1da177e4 LT |
2802 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2803 | if (status) { | |
f9d7562f | 2804 | if (new_access) { |
f197c271 | 2805 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2806 | nfs4_file_put_access(fp, oflag); |
2807 | } | |
1da177e4 LT |
2808 | return status; |
2809 | } | |
2810 | /* remember the open */ | |
82c5ff1b | 2811 | set_access(op_share_access, stp); |
ce0fc43c | 2812 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2813 | |
2814 | return nfs_ok; | |
2815 | } | |
2816 | ||
2817 | ||
1da177e4 | 2818 | static void |
1255a8f3 | 2819 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2820 | { |
dad1c067 | 2821 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2822 | } |
2823 | ||
14a24e99 BF |
2824 | /* Should we give out recallable state?: */ |
2825 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2826 | { | |
2827 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2828 | return true; | |
2829 | /* | |
2830 | * In the sessions case, since we don't have to establish a | |
2831 | * separate connection for callbacks, we assume it's OK | |
2832 | * until we hear otherwise: | |
2833 | */ | |
2834 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2835 | } | |
2836 | ||
22d38c4c BF |
2837 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2838 | { | |
2839 | struct file_lock *fl; | |
2840 | ||
2841 | fl = locks_alloc_lock(); | |
2842 | if (!fl) | |
2843 | return NULL; | |
2844 | locks_init_lock(fl); | |
2845 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2846 | fl->fl_flags = FL_LEASE; | |
2847 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2848 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2849 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2850 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2851 | return fl; |
2852 | } | |
2853 | ||
edab9782 BF |
2854 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2855 | { | |
acfdf5c3 | 2856 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2857 | struct file_lock *fl; |
2858 | int status; | |
2859 | ||
2860 | fl = nfs4_alloc_init_lease(dp, flag); | |
2861 | if (!fl) | |
2862 | return -ENOMEM; | |
acfdf5c3 | 2863 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2864 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2865 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2866 | if (status) { |
acfdf5c3 | 2867 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2868 | locks_free_lock(fl); |
2869 | return -ENOMEM; | |
2870 | } | |
acfdf5c3 | 2871 | fp->fi_lease = fl; |
cb0942b8 | 2872 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
2873 | atomic_set(&fp->fi_delegees, 1); |
2874 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2875 | return 0; | |
2876 | } | |
2877 | ||
2878 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2879 | { | |
2880 | struct nfs4_file *fp = dp->dl_file; | |
2881 | ||
2882 | if (!fp->fi_lease) | |
2883 | return nfs4_setlease(dp, flag); | |
2884 | spin_lock(&recall_lock); | |
2885 | if (fp->fi_had_conflict) { | |
2886 | spin_unlock(&recall_lock); | |
2887 | return -EAGAIN; | |
2888 | } | |
2889 | atomic_inc(&fp->fi_delegees); | |
2890 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2891 | spin_unlock(&recall_lock); | |
2a74aba7 | 2892 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2893 | return 0; |
2894 | } | |
2895 | ||
4aa8913c BH |
2896 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2897 | { | |
2898 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2899 | if (status == -EAGAIN) | |
2900 | open->op_why_no_deleg = WND4_CONTENTION; | |
2901 | else { | |
2902 | open->op_why_no_deleg = WND4_RESOURCE; | |
2903 | switch (open->op_deleg_want) { | |
2904 | case NFS4_SHARE_WANT_READ_DELEG: | |
2905 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2906 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2907 | break; | |
2908 | case NFS4_SHARE_WANT_CANCEL: | |
2909 | open->op_why_no_deleg = WND4_CANCELLED; | |
2910 | break; | |
2911 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 2912 | WARN_ON_ONCE(1); |
4aa8913c BH |
2913 | } |
2914 | } | |
2915 | } | |
2916 | ||
1da177e4 LT |
2917 | /* |
2918 | * Attempt to hand out a delegation. | |
2919 | */ | |
2920 | static void | |
5ccb0066 SK |
2921 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
2922 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
2923 | { |
2924 | struct nfs4_delegation *dp; | |
fe0750e5 | 2925 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2926 | int cb_up; |
d24433cd | 2927 | int status = 0, flag = 0; |
1da177e4 | 2928 | |
fe0750e5 | 2929 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2930 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2931 | open->op_recall = 0; |
2932 | switch (open->op_claim_type) { | |
2933 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2934 | if (!cb_up) |
7b190fec N |
2935 | open->op_recall = 1; |
2936 | flag = open->op_delegate_type; | |
2937 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2938 | goto out; | |
2939 | break; | |
2940 | case NFS4_OPEN_CLAIM_NULL: | |
2941 | /* Let's not give out any delegations till everyone's | |
2942 | * had the chance to reclaim theirs.... */ | |
5ccb0066 | 2943 | if (locks_in_grace(net)) |
7b190fec | 2944 | goto out; |
dad1c067 | 2945 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2946 | goto out; |
2947 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2948 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2949 | else | |
2950 | flag = NFS4_OPEN_DELEGATE_READ; | |
2951 | break; | |
2952 | default: | |
2953 | goto out; | |
2954 | } | |
1da177e4 | 2955 | |
fe0750e5 | 2956 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2957 | if (dp == NULL) |
2958 | goto out_no_deleg; | |
acfdf5c3 | 2959 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2960 | if (status) |
dd239cc0 | 2961 | goto out_free; |
1da177e4 | 2962 | |
d5477a8d | 2963 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2964 | |
8c10cbdb | 2965 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2966 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2967 | out: |
2968 | open->op_delegate_type = flag; | |
d24433cd BH |
2969 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2970 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2971 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2972 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2973 | ||
4aa8913c BH |
2974 | /* 4.1 client asking for a delegation? */ |
2975 | if (open->op_deleg_want) | |
2976 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 2977 | } |
dd239cc0 BF |
2978 | return; |
2979 | out_free: | |
24ffb938 | 2980 | unhash_stid(&dp->dl_stid); |
acfdf5c3 | 2981 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2982 | out_no_deleg: |
2983 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2984 | goto out; | |
1da177e4 LT |
2985 | } |
2986 | ||
e27f49c3 BH |
2987 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
2988 | struct nfs4_delegation *dp) | |
2989 | { | |
2990 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
2991 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2992 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2993 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
2994 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
2995 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2996 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2997 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
2998 | } | |
2999 | /* Otherwise the client must be confused wanting a delegation | |
3000 | * it already has, therefore we don't return | |
3001 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3002 | */ | |
3003 | } | |
3004 | ||
1da177e4 LT |
3005 | /* |
3006 | * called with nfs4_lock_state() held. | |
3007 | */ | |
b37ad28b | 3008 | __be32 |
1da177e4 LT |
3009 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3010 | { | |
6668958f | 3011 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3012 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3013 | struct nfs4_file *fp = NULL; |
3014 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3015 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3016 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3017 | __be32 status; |
1da177e4 | 3018 | |
1da177e4 LT |
3019 | /* |
3020 | * Lookup file; if found, lookup stateid and check open request, | |
3021 | * and check for delegations in the process of being recalled. | |
3022 | * If not found, create the nfs4_file struct | |
3023 | */ | |
3024 | fp = find_file(ino); | |
3025 | if (fp) { | |
3026 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3027 | goto out; | |
38c2f4b1 | 3028 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3029 | if (status) |
3030 | goto out; | |
1da177e4 | 3031 | } else { |
c44c5eeb | 3032 | status = nfserr_bad_stateid; |
8b289b2c | 3033 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3034 | goto out; |
3e772463 | 3035 | status = nfserr_jukebox; |
32513b40 BF |
3036 | fp = open->op_file; |
3037 | open->op_file = NULL; | |
3038 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3039 | } |
3040 | ||
3041 | /* | |
3042 | * OPEN the file, or upgrade an existing OPEN. | |
3043 | * If truncate fails, the OPEN fails. | |
3044 | */ | |
3045 | if (stp) { | |
3046 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3047 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3048 | if (status) |
3049 | goto out; | |
3050 | } else { | |
4cdc951b | 3051 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3052 | if (status) |
3053 | goto out; | |
3054 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3055 | if (status) |
1da177e4 | 3056 | goto out; |
4cdc951b BF |
3057 | stp = open->op_stp; |
3058 | open->op_stp = NULL; | |
996e0938 | 3059 | init_open_stateid(stp, fp, open); |
1da177e4 | 3060 | } |
dcef0413 BF |
3061 | update_stateid(&stp->st_stid.sc_stateid); |
3062 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3063 | |
d24433cd | 3064 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3065 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3066 | |
d24433cd BH |
3067 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3068 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3069 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3070 | goto nodeleg; | |
3071 | } | |
3072 | } | |
3073 | ||
1da177e4 LT |
3074 | /* |
3075 | * Attempt to hand out a delegation. No error return, because the | |
3076 | * OPEN succeeds even if we fail. | |
3077 | */ | |
5ccb0066 | 3078 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3079 | nodeleg: |
1da177e4 LT |
3080 | status = nfs_ok; |
3081 | ||
8c10cbdb | 3082 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3083 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3084 | out: |
d24433cd BH |
3085 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3086 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3087 | open->op_deleg_want) |
3088 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3089 | |
13cd2184 N |
3090 | if (fp) |
3091 | put_nfs4_file(fp); | |
37515177 | 3092 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3093 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3094 | /* |
3095 | * To finish the open response, we just need to set the rflags. | |
3096 | */ | |
3097 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3098 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3099 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3100 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3101 | ||
3102 | return status; | |
3103 | } | |
3104 | ||
d29b20cd BF |
3105 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3106 | { | |
3107 | if (open->op_openowner) { | |
3108 | struct nfs4_openowner *oo = open->op_openowner; | |
3109 | ||
3110 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3111 | list_del_init(&oo->oo_close_lru); | |
3112 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3113 | if (status) { | |
3114 | release_openowner(oo); | |
3115 | open->op_openowner = NULL; | |
3116 | } else | |
3117 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3118 | } | |
3119 | } | |
32513b40 BF |
3120 | if (open->op_file) |
3121 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3122 | if (open->op_stp) |
ef79859e | 3123 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3124 | } |
3125 | ||
9b2ef62b BF |
3126 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
3127 | { | |
3128 | struct nfs4_client *found; | |
3129 | ||
3130 | if (STALE_CLIENTID(clid, nn)) | |
3131 | return nfserr_stale_clientid; | |
3132 | found = find_confirmed_client(clid, session, nn); | |
3133 | if (clp) | |
3134 | *clp = found; | |
3135 | return found ? nfs_ok : nfserr_expired; | |
3136 | } | |
3137 | ||
b37ad28b | 3138 | __be32 |
b591480b BF |
3139 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3140 | clientid_t *clid) | |
1da177e4 LT |
3141 | { |
3142 | struct nfs4_client *clp; | |
b37ad28b | 3143 | __be32 status; |
7f2210fa | 3144 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3145 | |
3146 | nfs4_lock_state(); | |
3147 | dprintk("process_renew(%08x/%08x): starting\n", | |
3148 | clid->cl_boot, clid->cl_id); | |
9b2ef62b BF |
3149 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
3150 | if (status) | |
1da177e4 | 3151 | goto out; |
1da177e4 | 3152 | status = nfserr_cb_path_down; |
ea1da636 | 3153 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3154 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3155 | goto out; |
3156 | status = nfs_ok; | |
3157 | out: | |
3158 | nfs4_unlock_state(); | |
3159 | return status; | |
3160 | } | |
3161 | ||
a76b4319 | 3162 | static void |
12760c66 | 3163 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3164 | { |
33dcc481 | 3165 | /* do nothing if grace period already ended */ |
a51c84ed | 3166 | if (nn->grace_ended) |
33dcc481 JL |
3167 | return; |
3168 | ||
a76b4319 | 3169 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3170 | nn->grace_ended = true; |
12760c66 | 3171 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3172 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3173 | /* |
3174 | * Now that every NFSv4 client has had the chance to recover and | |
3175 | * to see the (possibly new, possibly shorter) lease time, we | |
3176 | * can safely set the next grace time to the current lease time: | |
3177 | */ | |
5284b44e | 3178 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3179 | } |
3180 | ||
fd39ca9a | 3181 | static time_t |
09121281 | 3182 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3183 | { |
3184 | struct nfs4_client *clp; | |
fe0750e5 | 3185 | struct nfs4_openowner *oo; |
1da177e4 LT |
3186 | struct nfs4_delegation *dp; |
3187 | struct list_head *pos, *next, reaplist; | |
3d733711 SK |
3188 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
3189 | time_t t, clientid_val = nn->nfsd4_lease; | |
3190 | time_t u, test_val = nn->nfsd4_lease; | |
1da177e4 LT |
3191 | |
3192 | nfs4_lock_state(); | |
3193 | ||
3194 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3195 | nfsd4_end_grace(nn); |
36acb66b | 3196 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3197 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3198 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3199 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3200 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3201 | t = clp->cl_time - cutoff; | |
3202 | if (clientid_val > t) | |
3203 | clientid_val = t; | |
3204 | break; | |
3205 | } | |
d7682988 BH |
3206 | if (atomic_read(&clp->cl_refcount)) { |
3207 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3208 | clp->cl_clientid.cl_id); | |
3209 | continue; | |
3210 | } | |
3211 | unhash_client_locked(clp); | |
3212 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b | 3213 | } |
c9a49628 | 3214 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3215 | list_for_each_safe(pos, next, &reaplist) { |
3216 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3217 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3218 | clp->cl_clientid.cl_id); | |
3219 | expire_client(clp); | |
3220 | } | |
1da177e4 LT |
3221 | spin_lock(&recall_lock); |
3222 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3223 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4e37a7c2 SK |
3224 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3225 | continue; | |
1da177e4 LT |
3226 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
3227 | u = dp->dl_time - cutoff; | |
3228 | if (test_val > u) | |
3229 | test_val = u; | |
3230 | break; | |
3231 | } | |
1da177e4 LT |
3232 | list_move(&dp->dl_recall_lru, &reaplist); |
3233 | } | |
3234 | spin_unlock(&recall_lock); | |
3235 | list_for_each_safe(pos, next, &reaplist) { | |
3236 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3237 | unhash_delegation(dp); |
3238 | } | |
3d733711 | 3239 | test_val = nn->nfsd4_lease; |
73758fed | 3240 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3241 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3242 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3243 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3244 | if (test_val > u) |
3245 | test_val = u; | |
3246 | break; | |
3247 | } | |
fe0750e5 | 3248 | release_openowner(oo); |
1da177e4 LT |
3249 | } |
3250 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3251 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3252 | nfs4_unlock_state(); | |
3253 | return clientid_val; | |
3254 | } | |
3255 | ||
a254b246 HH |
3256 | static struct workqueue_struct *laundry_wq; |
3257 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3258 | |
3259 | static void | |
09121281 | 3260 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3261 | { |
3262 | time_t t; | |
09121281 SK |
3263 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3264 | work); | |
3265 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3266 | laundromat_work); | |
1da177e4 | 3267 | |
09121281 | 3268 | t = nfs4_laundromat(nn); |
1da177e4 | 3269 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3270 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3271 | } |
3272 | ||
f7a4d872 | 3273 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3274 | { |
f7a4d872 BF |
3275 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3276 | return nfserr_bad_stateid; | |
3277 | return nfs_ok; | |
1da177e4 LT |
3278 | } |
3279 | ||
3280 | static int | |
2c142baa | 3281 | STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) |
1da177e4 | 3282 | { |
2c142baa | 3283 | if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) |
e4e83ea4 BF |
3284 | return 0; |
3285 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3286 | STATEID_VAL(stateid)); |
e4e83ea4 | 3287 | return 1; |
1da177e4 LT |
3288 | } |
3289 | ||
3290 | static inline int | |
82c5ff1b | 3291 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3292 | { |
82c5ff1b JL |
3293 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3294 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3295 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3296 | } |
3297 | ||
3298 | static inline int | |
82c5ff1b | 3299 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3300 | { |
82c5ff1b JL |
3301 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3302 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3303 | } |
3304 | ||
3305 | static | |
dcef0413 | 3306 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3307 | { |
b37ad28b | 3308 | __be32 status = nfserr_openmode; |
1da177e4 | 3309 | |
02921914 BF |
3310 | /* For lock stateid's, we test the parent open, not the lock: */ |
3311 | if (stp->st_openstp) | |
3312 | stp = stp->st_openstp; | |
82c5ff1b | 3313 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3314 | goto out; |
82c5ff1b | 3315 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3316 | goto out; |
3317 | status = nfs_ok; | |
3318 | out: | |
3319 | return status; | |
3320 | } | |
3321 | ||
b37ad28b | 3322 | static inline __be32 |
5ccb0066 | 3323 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3324 | { |
203a8c8e | 3325 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3326 | return nfs_ok; |
5ccb0066 | 3327 | else if (locks_in_grace(net)) { |
25985edc | 3328 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3329 | * conflicting state; so we must wait out the grace period. */ |
3330 | return nfserr_grace; | |
3331 | } else if (flags & WR_STATE) | |
3332 | return nfs4_share_conflict(current_fh, | |
3333 | NFS4_SHARE_DENY_WRITE); | |
3334 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3335 | return nfs4_share_conflict(current_fh, | |
3336 | NFS4_SHARE_DENY_READ); | |
3337 | } | |
3338 | ||
3339 | /* | |
3340 | * Allow READ/WRITE during grace period on recovered state only for files | |
3341 | * that are not able to provide mandatory locking. | |
3342 | */ | |
3343 | static inline int | |
5ccb0066 | 3344 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3345 | { |
5ccb0066 | 3346 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3347 | } |
3348 | ||
81b82965 BF |
3349 | /* Returns true iff a is later than b: */ |
3350 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3351 | { | |
3352 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3353 | } | |
3354 | ||
57b7b43b | 3355 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3356 | { |
6668958f AA |
3357 | /* |
3358 | * When sessions are used the stateid generation number is ignored | |
3359 | * when it is zero. | |
3360 | */ | |
28dde241 | 3361 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3362 | return nfs_ok; |
3363 | ||
3364 | if (in->si_generation == ref->si_generation) | |
3365 | return nfs_ok; | |
6668958f | 3366 | |
0836f587 | 3367 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3368 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3369 | return nfserr_bad_stateid; |
3370 | /* | |
81b82965 BF |
3371 | * However, we could see a stateid from the past, even from a |
3372 | * non-buggy client. For example, if the client sends a lock | |
3373 | * while some IO is outstanding, the lock may bump si_generation | |
3374 | * while the IO is still in flight. The client could avoid that | |
3375 | * situation by waiting for responses on all the IO requests, | |
3376 | * but better performance may result in retrying IO that | |
3377 | * receives an old_stateid error if requests are rarely | |
3378 | * reordered in flight: | |
0836f587 | 3379 | */ |
81b82965 | 3380 | return nfserr_old_stateid; |
0836f587 BF |
3381 | } |
3382 | ||
7df302f7 | 3383 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3384 | { |
97b7e3b6 BF |
3385 | struct nfs4_stid *s; |
3386 | struct nfs4_ol_stateid *ols; | |
3387 | __be32 status; | |
17456804 | 3388 | |
7df302f7 CL |
3389 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3390 | return nfserr_bad_stateid; | |
3391 | /* Client debugging aid. */ | |
3392 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3393 | char addr_str[INET6_ADDRSTRLEN]; | |
3394 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3395 | sizeof(addr_str)); | |
3396 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3397 | "with incorrect client ID\n", addr_str); | |
3398 | return nfserr_bad_stateid; | |
3399 | } | |
38c2f4b1 | 3400 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3401 | if (!s) |
7df302f7 | 3402 | return nfserr_bad_stateid; |
36279ac1 | 3403 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3404 | if (status) |
97b7e3b6 BF |
3405 | return status; |
3406 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3407 | return nfs_ok; | |
3408 | ols = openlockstateid(s); | |
3409 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3410 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3411 | return nfserr_bad_stateid; |
3412 | return nfs_ok; | |
17456804 BS |
3413 | } |
3414 | ||
3320fef1 SK |
3415 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
3416 | struct nfs4_stid **s, bool sessions, | |
3417 | struct nfsd_net *nn) | |
38c2f4b1 BF |
3418 | { |
3419 | struct nfs4_client *cl; | |
3420 | ||
3421 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3422 | return nfserr_bad_stateid; | |
2c142baa | 3423 | if (STALE_STATEID(stateid, nn)) |
38c2f4b1 | 3424 | return nfserr_stale_stateid; |
8daae4dc | 3425 | cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions, nn); |
38c2f4b1 BF |
3426 | if (!cl) |
3427 | return nfserr_expired; | |
3428 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3429 | if (!*s) | |
3430 | return nfserr_bad_stateid; | |
3431 | return nfs_ok; | |
3432 | ||
3433 | } | |
3434 | ||
1da177e4 LT |
3435 | /* |
3436 | * Checks for stateid operations | |
3437 | */ | |
b37ad28b | 3438 | __be32 |
5ccb0066 | 3439 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3440 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3441 | { |
69064a27 | 3442 | struct nfs4_stid *s; |
dcef0413 | 3443 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3444 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3445 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3446 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3447 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b37ad28b | 3448 | __be32 status; |
1da177e4 | 3449 | |
1da177e4 LT |
3450 | if (filpp) |
3451 | *filpp = NULL; | |
3452 | ||
5ccb0066 | 3453 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3454 | return nfserr_grace; |
3455 | ||
3456 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3457 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3458 | |
3320fef1 SK |
3459 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
3460 | &s, cstate->minorversion, nn); | |
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; |
063b0fb9 BF |
3474 | if (!*filpp) { |
3475 | WARN_ON_ONCE(1); | |
3476 | status = nfserr_serverfault; | |
3477 | goto out; | |
3478 | } | |
43b0178e | 3479 | } |
f7a4d872 BF |
3480 | break; |
3481 | case NFS4_OPEN_STID: | |
3482 | case NFS4_LOCK_STID: | |
69064a27 | 3483 | stp = openlockstateid(s); |
f7a4d872 BF |
3484 | status = nfs4_check_fh(current_fh, stp); |
3485 | if (status) | |
1da177e4 | 3486 | goto out; |
fe0750e5 | 3487 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3488 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3489 | goto out; |
a4455be0 BF |
3490 | status = nfs4_check_openmode(stp, flags); |
3491 | if (status) | |
1da177e4 | 3492 | goto out; |
f9d7562f BF |
3493 | if (filpp) { |
3494 | if (flags & RD_STATE) | |
3495 | *filpp = find_readable_file(stp->st_file); | |
3496 | else | |
3497 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3498 | } |
f7a4d872 BF |
3499 | break; |
3500 | default: | |
3501 | return nfserr_bad_stateid; | |
1da177e4 LT |
3502 | } |
3503 | status = nfs_ok; | |
3504 | out: | |
3505 | return status; | |
3506 | } | |
3507 | ||
e1ca12df | 3508 | static __be32 |
dcef0413 | 3509 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3510 | { |
fe0750e5 | 3511 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3512 | return nfserr_locks_held; |
3513 | release_lock_stateid(stp); | |
3514 | return nfs_ok; | |
3515 | } | |
3516 | ||
17456804 BS |
3517 | /* |
3518 | * Test if the stateid is valid | |
3519 | */ | |
3520 | __be32 | |
3521 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3522 | struct nfsd4_test_stateid *test_stateid) | |
3523 | { | |
03cfb420 BS |
3524 | struct nfsd4_test_stateid_id *stateid; |
3525 | struct nfs4_client *cl = cstate->session->se_client; | |
3526 | ||
3527 | nfs4_lock_state(); | |
3528 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3529 | stateid->ts_id_status = |
3530 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3531 | nfs4_unlock_state(); |
3532 | ||
17456804 BS |
3533 | return nfs_ok; |
3534 | } | |
3535 | ||
e1ca12df BS |
3536 | __be32 |
3537 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3538 | struct nfsd4_free_stateid *free_stateid) | |
3539 | { | |
3540 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3541 | struct nfs4_stid *s; |
38c2f4b1 | 3542 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3543 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3544 | |
3545 | nfs4_lock_state(); | |
38c2f4b1 | 3546 | s = find_stateid(cl, stateid); |
2da1cec7 | 3547 | if (!s) |
81b82965 | 3548 | goto out; |
2da1cec7 BF |
3549 | switch (s->sc_type) { |
3550 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3551 | ret = nfserr_locks_held; |
3552 | goto out; | |
2da1cec7 BF |
3553 | case NFS4_OPEN_STID: |
3554 | case NFS4_LOCK_STID: | |
3555 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3556 | if (ret) | |
3557 | goto out; | |
3558 | if (s->sc_type == NFS4_LOCK_STID) | |
3559 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3560 | else | |
3561 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3562 | break; |
3563 | default: | |
3564 | ret = nfserr_bad_stateid; | |
e1ca12df | 3565 | } |
e1ca12df BS |
3566 | out: |
3567 | nfs4_unlock_state(); | |
3568 | return ret; | |
3569 | } | |
3570 | ||
4c4cd222 N |
3571 | static inline int |
3572 | setlkflg (int type) | |
3573 | { | |
3574 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3575 | RD_STATE : WR_STATE; | |
3576 | } | |
1da177e4 | 3577 | |
dcef0413 | 3578 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3579 | { |
3580 | struct svc_fh *current_fh = &cstate->current_fh; | |
3581 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3582 | __be32 status; | |
3583 | ||
c0a5d93e BF |
3584 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3585 | if (status) | |
3586 | return status; | |
f7a4d872 BF |
3587 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3588 | /* | |
3589 | * "Closed" stateid's exist *only* to return | |
3590 | * nfserr_replay_me from the previous step. | |
3591 | */ | |
3592 | return nfserr_bad_stateid; | |
3593 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3594 | if (status) | |
3595 | return status; | |
3596 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3597 | } |
3598 | ||
1da177e4 LT |
3599 | /* |
3600 | * Checks for sequence id mutating operations. | |
3601 | */ | |
b37ad28b | 3602 | static __be32 |
dd453dfd | 3603 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3604 | stateid_t *stateid, char typemask, |
3320fef1 SK |
3605 | struct nfs4_ol_stateid **stpp, |
3606 | struct nfsd_net *nn) | |
1da177e4 | 3607 | { |
0836f587 | 3608 | __be32 status; |
38c2f4b1 | 3609 | struct nfs4_stid *s; |
1da177e4 | 3610 | |
8c10cbdb BH |
3611 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3612 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3613 | |
1da177e4 | 3614 | *stpp = NULL; |
3320fef1 SK |
3615 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
3616 | cstate->minorversion, nn); | |
c0a5d93e BF |
3617 | if (status) |
3618 | return status; | |
38c2f4b1 | 3619 | *stpp = openlockstateid(s); |
c0a5d93e | 3620 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3621 | |
c0a5d93e BF |
3622 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3623 | } | |
39325bd0 | 3624 | |
3320fef1 SK |
3625 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3626 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
3627 | { |
3628 | __be32 status; | |
3629 | struct nfs4_openowner *oo; | |
1da177e4 | 3630 | |
c0a5d93e | 3631 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 3632 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
3633 | if (status) |
3634 | return status; | |
c0a5d93e | 3635 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3636 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3637 | return nfserr_bad_stateid; |
3a4f98bb | 3638 | return nfs_ok; |
1da177e4 LT |
3639 | } |
3640 | ||
b37ad28b | 3641 | __be32 |
ca364317 | 3642 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3643 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3644 | { |
b37ad28b | 3645 | __be32 status; |
fe0750e5 | 3646 | struct nfs4_openowner *oo; |
dcef0413 | 3647 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3648 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3649 | |
3650 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3651 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3652 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3653 | |
ca364317 | 3654 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3655 | if (status) |
3656 | return status; | |
1da177e4 LT |
3657 | |
3658 | nfs4_lock_state(); | |
3659 | ||
9072d5c6 | 3660 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3661 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 3662 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 3663 | if (status) |
68b66e82 | 3664 | goto out; |
fe0750e5 | 3665 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3666 | status = nfserr_bad_stateid; |
dad1c067 | 3667 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3668 | goto out; |
dad1c067 | 3669 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3670 | update_stateid(&stp->st_stid.sc_stateid); |
3671 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3672 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3673 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3674 | |
2a4317c5 | 3675 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3676 | status = nfs_ok; |
1da177e4 | 3677 | out: |
5ec094c1 BF |
3678 | if (!cstate->replay_owner) |
3679 | nfs4_unlock_state(); | |
1da177e4 LT |
3680 | return status; |
3681 | } | |
3682 | ||
6409a5a6 | 3683 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3684 | { |
82c5ff1b | 3685 | if (!test_access(access, stp)) |
6409a5a6 BF |
3686 | return; |
3687 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3688 | clear_access(access, stp); |
6409a5a6 | 3689 | } |
f197c271 | 3690 | |
6409a5a6 BF |
3691 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3692 | { | |
3693 | switch (to_access) { | |
3694 | case NFS4_SHARE_ACCESS_READ: | |
3695 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3696 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3697 | break; | |
3698 | case NFS4_SHARE_ACCESS_WRITE: | |
3699 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3700 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3701 | break; | |
3702 | case NFS4_SHARE_ACCESS_BOTH: | |
3703 | break; | |
3704 | default: | |
063b0fb9 | 3705 | WARN_ON_ONCE(1); |
1da177e4 LT |
3706 | } |
3707 | } | |
3708 | ||
3709 | static void | |
ce0fc43c | 3710 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3711 | { |
3712 | int i; | |
3713 | for (i = 0; i < 4; i++) { | |
3714 | if ((i & deny) != i) | |
ce0fc43c | 3715 | clear_deny(i, stp); |
1da177e4 LT |
3716 | } |
3717 | } | |
3718 | ||
b37ad28b | 3719 | __be32 |
ca364317 BF |
3720 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3721 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3722 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3723 | { |
b37ad28b | 3724 | __be32 status; |
dcef0413 | 3725 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3726 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3727 | |
3728 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3729 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3730 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3731 | |
c30e92df | 3732 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3733 | if (od->od_deleg_want) |
3734 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3735 | od->od_deleg_want); | |
1da177e4 LT |
3736 | |
3737 | nfs4_lock_state(); | |
c0a5d93e | 3738 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 3739 | &od->od_stateid, &stp, nn); |
9072d5c6 | 3740 | if (status) |
1da177e4 | 3741 | goto out; |
1da177e4 | 3742 | status = nfserr_inval; |
82c5ff1b JL |
3743 | if (!test_access(od->od_share_access, stp)) { |
3744 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3745 | stp->st_access_bmap, od->od_share_access); |
3746 | goto out; | |
3747 | } | |
ce0fc43c | 3748 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3749 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3750 | stp->st_deny_bmap, od->od_share_deny); | |
3751 | goto out; | |
3752 | } | |
6409a5a6 | 3753 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3754 | |
ce0fc43c | 3755 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3756 | |
dcef0413 BF |
3757 | update_stateid(&stp->st_stid.sc_stateid); |
3758 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3759 | status = nfs_ok; |
3760 | out: | |
5ec094c1 BF |
3761 | if (!cstate->replay_owner) |
3762 | nfs4_unlock_state(); | |
1da177e4 LT |
3763 | return status; |
3764 | } | |
3765 | ||
38c387b5 BF |
3766 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3767 | { | |
3768 | struct nfs4_openowner *oo; | |
3769 | struct nfs4_ol_stateid *s; | |
3770 | ||
3771 | if (!so->so_is_open_owner) | |
3772 | return; | |
3773 | oo = openowner(so); | |
3774 | s = oo->oo_last_closed_stid; | |
3775 | if (!s) | |
3776 | return; | |
3777 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3778 | /* Release the last_closed_stid on the next seqid bump: */ | |
3779 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3780 | return; | |
3781 | } | |
3782 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3783 | release_last_closed_stateid(oo); |
3784 | } | |
3785 | ||
3786 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3787 | { | |
3788 | unhash_open_stateid(s); | |
3789 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3790 | } |
3791 | ||
1da177e4 LT |
3792 | /* |
3793 | * nfs4_unlock_state() called after encode | |
3794 | */ | |
b37ad28b | 3795 | __be32 |
ca364317 | 3796 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3797 | struct nfsd4_close *close) |
1da177e4 | 3798 | { |
b37ad28b | 3799 | __be32 status; |
fe0750e5 | 3800 | struct nfs4_openowner *oo; |
dcef0413 | 3801 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
3802 | struct net *net = SVC_NET(rqstp); |
3803 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
3804 | |
3805 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3806 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3807 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3808 | |
3809 | nfs4_lock_state(); | |
f7a4d872 BF |
3810 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3811 | &close->cl_stateid, | |
3812 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 3813 | &stp, nn); |
9072d5c6 | 3814 | if (status) |
1da177e4 | 3815 | goto out; |
fe0750e5 | 3816 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3817 | status = nfs_ok; |
dcef0413 BF |
3818 | update_stateid(&stp->st_stid.sc_stateid); |
3819 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3820 | |
f7a4d872 | 3821 | nfsd4_close_open_stateid(stp); |
cf9182e9 | 3822 | release_last_closed_stateid(oo); |
38c387b5 | 3823 | oo->oo_last_closed_stid = stp; |
04ef5954 | 3824 | |
74dbafaf BF |
3825 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3826 | if (cstate->minorversion) { | |
3827 | release_openowner(oo); | |
3828 | cstate->replay_owner = NULL; | |
3829 | } else { | |
3830 | /* | |
3831 | * In the 4.0 case we need to keep the owners around a | |
3832 | * little while to handle CLOSE replay. | |
3833 | */ | |
3834 | if (list_empty(&oo->oo_owner.so_stateids)) | |
73758fed | 3835 | move_to_close_lru(oo, SVC_NET(rqstp)); |
74dbafaf BF |
3836 | } |
3837 | } | |
1da177e4 | 3838 | out: |
5ec094c1 BF |
3839 | if (!cstate->replay_owner) |
3840 | nfs4_unlock_state(); | |
1da177e4 LT |
3841 | return status; |
3842 | } | |
3843 | ||
b37ad28b | 3844 | __be32 |
ca364317 BF |
3845 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3846 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3847 | { |
203a8c8e BF |
3848 | struct nfs4_delegation *dp; |
3849 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3850 | struct nfs4_stid *s; |
b37ad28b | 3851 | __be32 status; |
3320fef1 | 3852 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3853 | |
ca364317 | 3854 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 3855 | return status; |
1da177e4 LT |
3856 | |
3857 | nfs4_lock_state(); | |
3320fef1 SK |
3858 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
3859 | cstate->minorversion, nn); | |
38c2f4b1 | 3860 | if (status) |
203a8c8e | 3861 | goto out; |
38c2f4b1 | 3862 | dp = delegstateid(s); |
d5477a8d | 3863 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3864 | if (status) |
3865 | goto out; | |
203a8c8e BF |
3866 | |
3867 | unhash_delegation(dp); | |
1da177e4 | 3868 | out: |
203a8c8e BF |
3869 | nfs4_unlock_state(); |
3870 | ||
1da177e4 LT |
3871 | return status; |
3872 | } | |
3873 | ||
3874 | ||
1da177e4 | 3875 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3876 | |
009673b4 | 3877 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
1da177e4 | 3878 | |
87df4de8 BH |
3879 | static inline u64 |
3880 | end_offset(u64 start, u64 len) | |
3881 | { | |
3882 | u64 end; | |
3883 | ||
3884 | end = start + len; | |
3885 | return end >= start ? end: NFS4_MAX_UINT64; | |
3886 | } | |
3887 | ||
3888 | /* last octet in a range */ | |
3889 | static inline u64 | |
3890 | last_byte_offset(u64 start, u64 len) | |
3891 | { | |
3892 | u64 end; | |
3893 | ||
063b0fb9 | 3894 | WARN_ON_ONCE(!len); |
87df4de8 BH |
3895 | end = start + len; |
3896 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3897 | } | |
3898 | ||
009673b4 | 3899 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3900 | { |
3901 | return (file_hashval(inode) + cl_id | |
3902 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3903 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3904 | } |
3905 | ||
1da177e4 LT |
3906 | /* |
3907 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3908 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3909 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3910 | * locking, this prevents us from being completely protocol-compliant. The | |
3911 | * real solution to this problem is to start using unsigned file offsets in | |
3912 | * the VFS, but this is a very deep change! | |
3913 | */ | |
3914 | static inline void | |
3915 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3916 | { | |
3917 | if (lock->fl_start < 0) | |
3918 | lock->fl_start = OFFSET_MAX; | |
3919 | if (lock->fl_end < 0) | |
3920 | lock->fl_end = OFFSET_MAX; | |
3921 | } | |
3922 | ||
d5b9026a N |
3923 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3924 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3925 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3926 | }; |
1da177e4 LT |
3927 | |
3928 | static inline void | |
3929 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3930 | { | |
fe0750e5 | 3931 | struct nfs4_lockowner *lo; |
1da177e4 | 3932 | |
d5b9026a | 3933 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3934 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3935 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3936 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3937 | if (!deny->ld_owner.data) |
3938 | /* We just don't care that much */ | |
3939 | goto nevermind; | |
fe0750e5 BF |
3940 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3941 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3942 | } else { |
7c13f344 BF |
3943 | nevermind: |
3944 | deny->ld_owner.len = 0; | |
3945 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3946 | deny->ld_clientid.cl_boot = 0; |
3947 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3948 | } |
3949 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3950 | deny->ld_length = NFS4_MAX_UINT64; |
3951 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3952 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3953 | deny->ld_type = NFS4_READ_LT; | |
3954 | if (fl->fl_type != F_RDLCK) | |
3955 | deny->ld_type = NFS4_WRITE_LT; | |
3956 | } | |
3957 | ||
b93d87c1 BF |
3958 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3959 | { | |
3960 | struct nfs4_ol_stateid *lst; | |
3961 | ||
3962 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3963 | return false; | |
3964 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3965 | struct nfs4_ol_stateid, st_perstateowner); | |
3966 | return lst->st_file->fi_inode == inode; | |
3967 | } | |
3968 | ||
fe0750e5 BF |
3969 | static struct nfs4_lockowner * |
3970 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
20e9e2bc | 3971 | struct xdr_netobj *owner, struct nfsd_net *nn) |
1da177e4 | 3972 | { |
009673b4 | 3973 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3974 | struct nfs4_lockowner *lo; |
1da177e4 | 3975 | |
20e9e2bc | 3976 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3977 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3978 | return lo; | |
1da177e4 LT |
3979 | } |
3980 | return NULL; | |
3981 | } | |
3982 | ||
dcef0413 | 3983 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3984 | { |
009673b4 BF |
3985 | struct inode *inode = open_stp->st_file->fi_inode; |
3986 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3987 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
9b531137 | 3988 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
009673b4 | 3989 | |
9b531137 | 3990 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
20e9e2bc | 3991 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3992 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3993 | } |
3994 | ||
1da177e4 LT |
3995 | /* |
3996 | * Alloc a lock owner structure. | |
3997 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3998 | * occurred. |
1da177e4 | 3999 | * |
16bfdaaf | 4000 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4001 | */ |
4002 | ||
fe0750e5 | 4003 | static struct nfs4_lockowner * |
dcef0413 | 4004 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4005 | struct nfs4_lockowner *lo; |
1da177e4 | 4006 | |
fe0750e5 BF |
4007 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4008 | if (!lo) | |
1da177e4 | 4009 | return NULL; |
fe0750e5 BF |
4010 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4011 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4012 | /* It is the openowner seqid that will be incremented in encode in the |
4013 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4014 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4015 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4016 | return lo; | |
1da177e4 LT |
4017 | } |
4018 | ||
dcef0413 BF |
4019 | static struct nfs4_ol_stateid * |
4020 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4021 | { |
dcef0413 | 4022 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4023 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4024 | |
996e0938 | 4025 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4026 | if (stp == NULL) |
6136d2b4 | 4027 | return NULL; |
3abdb607 | 4028 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4029 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4030 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4031 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4032 | get_nfs4_file(fp); |
1da177e4 | 4033 | stp->st_file = fp; |
0997b173 | 4034 | stp->st_access_bmap = 0; |
1da177e4 | 4035 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4036 | stp->st_openstp = open_stp; |
1da177e4 LT |
4037 | return stp; |
4038 | } | |
4039 | ||
fd39ca9a | 4040 | static int |
1da177e4 LT |
4041 | check_lock_length(u64 offset, u64 length) |
4042 | { | |
87df4de8 | 4043 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4044 | LOFF_OVERFLOW(offset, length))); |
4045 | } | |
4046 | ||
dcef0413 | 4047 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4048 | { |
4049 | struct nfs4_file *fp = lock_stp->st_file; | |
4050 | int oflag = nfs4_access_to_omode(access); | |
4051 | ||
82c5ff1b | 4052 | if (test_access(access, lock_stp)) |
0997b173 BF |
4053 | return; |
4054 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4055 | set_access(access, lock_stp); |
0997b173 BF |
4056 | } |
4057 | ||
2355c596 | 4058 | 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 |
4059 | { |
4060 | struct nfs4_file *fi = ost->st_file; | |
4061 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4062 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4063 | struct nfs4_lockowner *lo; | |
4064 | unsigned int strhashval; | |
20e9e2bc | 4065 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4066 | |
20e9e2bc SK |
4067 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
4068 | &lock->v.new.owner, nn); | |
64a284d0 BF |
4069 | if (lo) { |
4070 | if (!cstate->minorversion) | |
4071 | return nfserr_bad_seqid; | |
4072 | /* XXX: a lockowner always has exactly one stateid: */ | |
4073 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4074 | struct nfs4_ol_stateid, st_perstateowner); | |
4075 | return nfs_ok; | |
4076 | } | |
16bfdaaf | 4077 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4078 | &lock->v.new.owner); |
4079 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4080 | if (lo == NULL) | |
4081 | return nfserr_jukebox; | |
4082 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4083 | if (*lst == NULL) { | |
4084 | release_lockowner(lo); | |
4085 | return nfserr_jukebox; | |
4086 | } | |
4087 | *new = true; | |
4088 | return nfs_ok; | |
4089 | } | |
4090 | ||
1da177e4 LT |
4091 | /* |
4092 | * LOCK operation | |
4093 | */ | |
b37ad28b | 4094 | __be32 |
ca364317 | 4095 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4096 | struct nfsd4_lock *lock) |
1da177e4 | 4097 | { |
fe0750e5 BF |
4098 | struct nfs4_openowner *open_sop = NULL; |
4099 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4100 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4101 | struct file *filp = NULL; |
21179d81 JL |
4102 | struct file_lock *file_lock = NULL; |
4103 | struct file_lock *conflock = NULL; | |
b37ad28b | 4104 | __be32 status = 0; |
64a284d0 | 4105 | bool new_state = false; |
b34f27aa | 4106 | int lkflg; |
b8dd7b9a | 4107 | int err; |
3320fef1 SK |
4108 | struct net *net = SVC_NET(rqstp); |
4109 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4110 | |
4111 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4112 | (long long) lock->lk_offset, | |
4113 | (long long) lock->lk_length); | |
4114 | ||
1da177e4 LT |
4115 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4116 | return nfserr_inval; | |
4117 | ||
ca364317 | 4118 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4119 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4120 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4121 | return status; | |
4122 | } | |
4123 | ||
1da177e4 LT |
4124 | nfs4_lock_state(); |
4125 | ||
4126 | if (lock->lk_is_new) { | |
dcef0413 | 4127 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4128 | |
4129 | if (nfsd4_has_session(cstate)) | |
4130 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4131 | memcpy(&lock->v.new.clientid, | |
4132 | &cstate->session->se_client->cl_clientid, | |
4133 | sizeof(clientid_t)); | |
4134 | ||
1da177e4 | 4135 | status = nfserr_stale_clientid; |
2c142baa | 4136 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4137 | goto out; |
1da177e4 | 4138 | |
1da177e4 | 4139 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4140 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4141 | lock->lk_new_open_seqid, |
4142 | &lock->lk_new_open_stateid, | |
3320fef1 | 4143 | &open_stp, nn); |
37515177 | 4144 | if (status) |
1da177e4 | 4145 | goto out; |
fe0750e5 | 4146 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4147 | status = nfserr_bad_stateid; |
684e5638 | 4148 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4149 | &lock->v.new.clientid)) |
4150 | goto out; | |
64a284d0 BF |
4151 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4152 | &lock_stp, &new_state); | |
e1aaa891 | 4153 | } else |
dd453dfd | 4154 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4155 | lock->lk_old_lock_seqid, |
4156 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4157 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4158 | if (status) |
4159 | goto out; | |
64a284d0 | 4160 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4161 | |
b34f27aa BF |
4162 | lkflg = setlkflg(lock->lk_type); |
4163 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4164 | if (status) | |
4165 | goto out; | |
4166 | ||
0dd395dc | 4167 | status = nfserr_grace; |
3320fef1 | 4168 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4169 | goto out; |
4170 | status = nfserr_no_grace; | |
3320fef1 | 4171 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4172 | goto out; |
4173 | ||
21179d81 JL |
4174 | file_lock = locks_alloc_lock(); |
4175 | if (!file_lock) { | |
4176 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4177 | status = nfserr_jukebox; | |
4178 | goto out; | |
4179 | } | |
4180 | ||
4181 | locks_init_lock(file_lock); | |
1da177e4 LT |
4182 | switch (lock->lk_type) { |
4183 | case NFS4_READ_LT: | |
4184 | case NFS4_READW_LT: | |
0997b173 BF |
4185 | filp = find_readable_file(lock_stp->st_file); |
4186 | if (filp) | |
4187 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4188 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4189 | break; |
1da177e4 LT |
4190 | case NFS4_WRITE_LT: |
4191 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4192 | filp = find_writeable_file(lock_stp->st_file); |
4193 | if (filp) | |
4194 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4195 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4196 | break; |
1da177e4 LT |
4197 | default: |
4198 | status = nfserr_inval; | |
4199 | goto out; | |
4200 | } | |
f9d7562f BF |
4201 | if (!filp) { |
4202 | status = nfserr_openmode; | |
4203 | goto out; | |
4204 | } | |
21179d81 JL |
4205 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4206 | file_lock->fl_pid = current->tgid; | |
4207 | file_lock->fl_file = filp; | |
4208 | file_lock->fl_flags = FL_POSIX; | |
4209 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4210 | file_lock->fl_start = lock->lk_offset; | |
4211 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4212 | nfs4_transform_lock_offset(file_lock); | |
4213 | ||
4214 | conflock = locks_alloc_lock(); | |
4215 | if (!conflock) { | |
4216 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4217 | status = nfserr_jukebox; | |
4218 | goto out; | |
4219 | } | |
1da177e4 | 4220 | |
21179d81 | 4221 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4222 | switch (-err) { |
1da177e4 | 4223 | case 0: /* success! */ |
dcef0413 BF |
4224 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4225 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4226 | sizeof(stateid_t)); |
b8dd7b9a | 4227 | status = 0; |
eb76b3fd AA |
4228 | break; |
4229 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4230 | status = nfserr_denied; | |
4231 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4232 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4233 | break; |
1da177e4 LT |
4234 | case (EDEADLK): |
4235 | status = nfserr_deadlock; | |
eb76b3fd | 4236 | break; |
3e772463 | 4237 | default: |
fd85b817 | 4238 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4239 | status = nfserrno(err); |
eb76b3fd | 4240 | break; |
1da177e4 | 4241 | } |
1da177e4 | 4242 | out: |
64a284d0 | 4243 | if (status && new_state) |
f044ff83 | 4244 | release_lockowner(lock_sop); |
5ec094c1 BF |
4245 | if (!cstate->replay_owner) |
4246 | nfs4_unlock_state(); | |
21179d81 JL |
4247 | if (file_lock) |
4248 | locks_free_lock(file_lock); | |
4249 | if (conflock) | |
4250 | locks_free_lock(conflock); | |
1da177e4 LT |
4251 | return status; |
4252 | } | |
4253 | ||
55ef1274 BF |
4254 | /* |
4255 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4256 | * so we do a temporary open here just to get an open file to pass to | |
4257 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4258 | * inode operation.) | |
4259 | */ | |
04da6e9d | 4260 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4261 | { |
4262 | struct file *file; | |
04da6e9d AV |
4263 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4264 | if (!err) { | |
4265 | err = nfserrno(vfs_test_lock(file, lock)); | |
4266 | nfsd_close(file); | |
4267 | } | |
55ef1274 BF |
4268 | return err; |
4269 | } | |
4270 | ||
1da177e4 LT |
4271 | /* |
4272 | * LOCKT operation | |
4273 | */ | |
b37ad28b | 4274 | __be32 |
ca364317 BF |
4275 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4276 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4277 | { |
4278 | struct inode *inode; | |
21179d81 | 4279 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4280 | struct nfs4_lockowner *lo; |
b37ad28b | 4281 | __be32 status; |
7f2210fa | 4282 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4283 | |
5ccb0066 | 4284 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4285 | return nfserr_grace; |
4286 | ||
4287 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4288 | return nfserr_inval; | |
4289 | ||
1da177e4 LT |
4290 | nfs4_lock_state(); |
4291 | ||
9b2ef62b BF |
4292 | if (!nfsd4_has_session(cstate)) { |
4293 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); | |
4294 | if (status) | |
4295 | goto out; | |
4296 | } | |
1da177e4 | 4297 | |
75c096f7 | 4298 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4299 | goto out; |
1da177e4 | 4300 | |
ca364317 | 4301 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4302 | file_lock = locks_alloc_lock(); |
4303 | if (!file_lock) { | |
4304 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4305 | status = nfserr_jukebox; | |
4306 | goto out; | |
4307 | } | |
4308 | locks_init_lock(file_lock); | |
1da177e4 LT |
4309 | switch (lockt->lt_type) { |
4310 | case NFS4_READ_LT: | |
4311 | case NFS4_READW_LT: | |
21179d81 | 4312 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4313 | break; |
4314 | case NFS4_WRITE_LT: | |
4315 | case NFS4_WRITEW_LT: | |
21179d81 | 4316 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4317 | break; |
4318 | default: | |
2fdada03 | 4319 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4320 | status = nfserr_inval; |
4321 | goto out; | |
4322 | } | |
4323 | ||
20e9e2bc | 4324 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4325 | if (lo) |
21179d81 JL |
4326 | file_lock->fl_owner = (fl_owner_t)lo; |
4327 | file_lock->fl_pid = current->tgid; | |
4328 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4329 | |
21179d81 JL |
4330 | file_lock->fl_start = lockt->lt_offset; |
4331 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4332 | |
21179d81 | 4333 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4334 | |
21179d81 | 4335 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4336 | if (status) |
fd85b817 | 4337 | goto out; |
04da6e9d | 4338 | |
21179d81 | 4339 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4340 | status = nfserr_denied; |
21179d81 | 4341 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4342 | } |
4343 | out: | |
4344 | nfs4_unlock_state(); | |
21179d81 JL |
4345 | if (file_lock) |
4346 | locks_free_lock(file_lock); | |
1da177e4 LT |
4347 | return status; |
4348 | } | |
4349 | ||
b37ad28b | 4350 | __be32 |
ca364317 | 4351 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4352 | struct nfsd4_locku *locku) |
1da177e4 | 4353 | { |
dcef0413 | 4354 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4355 | struct file *filp = NULL; |
21179d81 | 4356 | struct file_lock *file_lock = NULL; |
b37ad28b | 4357 | __be32 status; |
b8dd7b9a | 4358 | int err; |
3320fef1 SK |
4359 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4360 | ||
1da177e4 LT |
4361 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4362 | (long long) locku->lu_offset, | |
4363 | (long long) locku->lu_length); | |
4364 | ||
4365 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4366 | return nfserr_inval; | |
4367 | ||
4368 | nfs4_lock_state(); | |
4369 | ||
9072d5c6 | 4370 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4371 | &locku->lu_stateid, NFS4_LOCK_STID, |
4372 | &stp, nn); | |
9072d5c6 | 4373 | if (status) |
1da177e4 | 4374 | goto out; |
f9d7562f BF |
4375 | filp = find_any_file(stp->st_file); |
4376 | if (!filp) { | |
4377 | status = nfserr_lock_range; | |
4378 | goto out; | |
4379 | } | |
21179d81 JL |
4380 | file_lock = locks_alloc_lock(); |
4381 | if (!file_lock) { | |
4382 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4383 | status = nfserr_jukebox; | |
4384 | goto out; | |
4385 | } | |
4386 | locks_init_lock(file_lock); | |
4387 | file_lock->fl_type = F_UNLCK; | |
4388 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); | |
4389 | file_lock->fl_pid = current->tgid; | |
4390 | file_lock->fl_file = filp; | |
4391 | file_lock->fl_flags = FL_POSIX; | |
4392 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4393 | file_lock->fl_start = locku->lu_offset; | |
4394 | ||
4395 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4396 | locku->lu_length); | |
4397 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 LT |
4398 | |
4399 | /* | |
4400 | * Try to unlock the file in the VFS. | |
4401 | */ | |
21179d81 | 4402 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4403 | if (err) { |
fd85b817 | 4404 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4405 | goto out_nfserr; |
4406 | } | |
4407 | /* | |
4408 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4409 | */ | |
dcef0413 BF |
4410 | update_stateid(&stp->st_stid.sc_stateid); |
4411 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4412 | |
4413 | out: | |
71c3bcd7 BF |
4414 | if (!cstate->replay_owner) |
4415 | nfs4_unlock_state(); | |
21179d81 JL |
4416 | if (file_lock) |
4417 | locks_free_lock(file_lock); | |
1da177e4 LT |
4418 | return status; |
4419 | ||
4420 | out_nfserr: | |
b8dd7b9a | 4421 | status = nfserrno(err); |
1da177e4 LT |
4422 | goto out; |
4423 | } | |
4424 | ||
4425 | /* | |
4426 | * returns | |
4427 | * 1: locks held by lockowner | |
4428 | * 0: no locks held by lockowner | |
4429 | */ | |
4430 | static int | |
fe0750e5 | 4431 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4432 | { |
4433 | struct file_lock **flpp; | |
f9d7562f | 4434 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4435 | int status = 0; |
4436 | ||
b89f4321 | 4437 | lock_flocks(); |
1da177e4 | 4438 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4439 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4440 | status = 1; |
4441 | goto out; | |
796dadfd | 4442 | } |
1da177e4 LT |
4443 | } |
4444 | out: | |
b89f4321 | 4445 | unlock_flocks(); |
1da177e4 LT |
4446 | return status; |
4447 | } | |
4448 | ||
b37ad28b | 4449 | __be32 |
b591480b BF |
4450 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4451 | struct nfsd4_compound_state *cstate, | |
4452 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4453 | { |
4454 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4455 | struct nfs4_stateowner *sop; |
fe0750e5 | 4456 | struct nfs4_lockowner *lo; |
dcef0413 | 4457 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4458 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4459 | struct list_head matches; |
16bfdaaf | 4460 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4461 | __be32 status; |
7f2210fa | 4462 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4463 | |
4464 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4465 | clid->cl_boot, clid->cl_id); | |
4466 | ||
1da177e4 LT |
4467 | nfs4_lock_state(); |
4468 | ||
9b2ef62b BF |
4469 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
4470 | if (status) | |
4471 | goto out; | |
4472 | ||
3e9e3dbe | 4473 | status = nfserr_locks_held; |
3e9e3dbe | 4474 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4475 | |
9b531137 | 4476 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
4477 | if (sop->so_is_open_owner) |
4478 | continue; | |
06f1f864 BF |
4479 | if (!same_owner_str(sop, owner, clid)) |
4480 | continue; | |
4481 | list_for_each_entry(stp, &sop->so_stateids, | |
4482 | st_perstateowner) { | |
4483 | lo = lockowner(sop); | |
4484 | if (check_for_locks(stp->st_file, lo)) | |
4485 | goto out; | |
4486 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4487 | } |
3e9e3dbe N |
4488 | } |
4489 | /* Clients probably won't expect us to return with some (but not all) | |
4490 | * of the lockowner state released; so don't release any until all | |
4491 | * have been checked. */ | |
4492 | status = nfs_ok; | |
0fa822e4 | 4493 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4494 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4495 | lo_list); | |
0fa822e4 N |
4496 | /* unhash_stateowner deletes so_perclient only |
4497 | * for openowners. */ | |
fe0750e5 BF |
4498 | list_del(&lo->lo_list); |
4499 | release_lockowner(lo); | |
1da177e4 LT |
4500 | } |
4501 | out: | |
4502 | nfs4_unlock_state(); | |
4503 | return status; | |
4504 | } | |
4505 | ||
4506 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4507 | alloc_reclaim(void) |
1da177e4 | 4508 | { |
a55370a3 | 4509 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4510 | } |
4511 | ||
0ce0c2b5 | 4512 | bool |
52e19c09 | 4513 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4514 | { |
0ce0c2b5 | 4515 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4516 | |
52e19c09 | 4517 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4518 | return (crp && crp->cr_clp); |
c7b9a459 N |
4519 | } |
4520 | ||
1da177e4 LT |
4521 | /* |
4522 | * failure => all reset bets are off, nfserr_no_grace... | |
4523 | */ | |
772a9bbb | 4524 | struct nfs4_client_reclaim * |
52e19c09 | 4525 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4526 | { |
4527 | unsigned int strhashval; | |
772a9bbb | 4528 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4529 | |
a55370a3 N |
4530 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4531 | crp = alloc_reclaim(); | |
772a9bbb JL |
4532 | if (crp) { |
4533 | strhashval = clientstr_hashval(name); | |
4534 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4535 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4536 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4537 | crp->cr_clp = NULL; |
52e19c09 | 4538 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4539 | } |
4540 | return crp; | |
1da177e4 LT |
4541 | } |
4542 | ||
ce30e539 | 4543 | void |
52e19c09 | 4544 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4545 | { |
4546 | list_del(&crp->cr_strhash); | |
4547 | kfree(crp); | |
52e19c09 | 4548 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4549 | } |
4550 | ||
2a4317c5 | 4551 | void |
52e19c09 | 4552 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4553 | { |
4554 | struct nfs4_client_reclaim *crp = NULL; | |
4555 | int i; | |
4556 | ||
1da177e4 | 4557 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4558 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4559 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4560 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4561 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4562 | } |
4563 | } | |
063b0fb9 | 4564 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4565 | } |
4566 | ||
4567 | /* | |
4568 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4569 | struct nfs4_client_reclaim * |
52e19c09 | 4570 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4571 | { |
4572 | unsigned int strhashval; | |
1da177e4 LT |
4573 | struct nfs4_client_reclaim *crp = NULL; |
4574 | ||
278c931c | 4575 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4576 | |
278c931c | 4577 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4578 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4579 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4580 | return crp; |
4581 | } | |
4582 | } | |
4583 | return NULL; | |
4584 | } | |
4585 | ||
4586 | /* | |
4587 | * Called from OPEN. Look for clientid in reclaim list. | |
4588 | */ | |
b37ad28b | 4589 | __be32 |
3320fef1 | 4590 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4591 | { |
a52d726b JL |
4592 | struct nfs4_client *clp; |
4593 | ||
4594 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4595 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4596 | if (clp == NULL) |
4597 | return nfserr_reclaim_bad; | |
4598 | ||
4599 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4600 | } |
4601 | ||
65178db4 BS |
4602 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4603 | ||
44e34da6 BS |
4604 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4605 | { | |
4606 | expire_client(clp); | |
4607 | return 1; | |
4608 | } | |
4609 | ||
184c1847 BS |
4610 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4611 | { | |
4612 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4613 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4614 | printk(KERN_INFO "NFS Client: %s\n", buf); |
4615 | return 1; | |
4616 | } | |
4617 | ||
4618 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
4619 | const char *type) | |
4620 | { | |
4621 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4622 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4623 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
4624 | } | |
4625 | ||
fc29171f BS |
4626 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) |
4627 | { | |
4628 | struct nfs4_openowner *oop; | |
4629 | struct nfs4_lockowner *lop, *lo_next; | |
4630 | struct nfs4_ol_stateid *stp, *st_next; | |
4631 | u64 count = 0; | |
4632 | ||
4633 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
4634 | list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { | |
4635 | list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { | |
4636 | if (func) | |
4637 | func(lop); | |
4638 | if (++count == max) | |
4639 | return count; | |
4640 | } | |
4641 | } | |
4642 | } | |
4643 | ||
4644 | return count; | |
4645 | } | |
4646 | ||
4647 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
4648 | { | |
4649 | return nfsd_foreach_client_lock(clp, max, release_lockowner); | |
4650 | } | |
4651 | ||
184c1847 BS |
4652 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
4653 | { | |
4654 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
4655 | nfsd_print_count(clp, count, "locked files"); | |
4656 | return count; | |
4657 | } | |
4658 | ||
4dbdbda8 BS |
4659 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
4660 | { | |
4661 | struct nfs4_openowner *oop, *next; | |
4662 | u64 count = 0; | |
4663 | ||
4664 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
4665 | if (func) | |
4666 | func(oop); | |
4667 | if (++count == max) | |
4668 | break; | |
4669 | } | |
4670 | ||
4671 | return count; | |
4672 | } | |
4673 | ||
4674 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
4675 | { | |
4676 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
4677 | } | |
4678 | ||
184c1847 BS |
4679 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
4680 | { | |
4681 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
4682 | nfsd_print_count(clp, count, "open files"); | |
4683 | return count; | |
4684 | } | |
4685 | ||
269de30f BS |
4686 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
4687 | struct list_head *victims) | |
4688 | { | |
4689 | struct nfs4_delegation *dp, *next; | |
4690 | u64 count = 0; | |
4691 | ||
4692 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { | |
4693 | if (victims) | |
4694 | list_move(&dp->dl_recall_lru, victims); | |
4695 | if (++count == max) | |
4696 | break; | |
4697 | } | |
4698 | return count; | |
4699 | } | |
4700 | ||
4701 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
4702 | { | |
4703 | struct nfs4_delegation *dp, *next; | |
4704 | LIST_HEAD(victims); | |
4705 | u64 count; | |
4706 | ||
4707 | spin_lock(&recall_lock); | |
4708 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4709 | spin_unlock(&recall_lock); | |
4710 | ||
4711 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4712 | unhash_delegation(dp); | |
4713 | ||
4714 | return count; | |
4715 | } | |
4716 | ||
4717 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
4718 | { | |
4719 | struct nfs4_delegation *dp, *next; | |
4720 | LIST_HEAD(victims); | |
4721 | u64 count; | |
4722 | ||
4723 | spin_lock(&recall_lock); | |
4724 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4725 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4726 | nfsd_break_one_deleg(dp); | |
4727 | spin_unlock(&recall_lock); | |
4728 | ||
4729 | return count; | |
4730 | } | |
4731 | ||
184c1847 BS |
4732 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
4733 | { | |
4734 | u64 count = 0; | |
4735 | ||
4736 | spin_lock(&recall_lock); | |
4737 | count = nfsd_find_all_delegations(clp, max, NULL); | |
4738 | spin_unlock(&recall_lock); | |
4739 | ||
4740 | nfsd_print_count(clp, count, "delegations"); | |
4741 | return count; | |
4742 | } | |
4743 | ||
44e34da6 | 4744 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
4745 | { |
4746 | struct nfs4_client *clp, *next; | |
44e34da6 | 4747 | u64 count = 0; |
3320fef1 | 4748 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 4749 | |
44e34da6 BS |
4750 | if (!nfsd_netns_ready(nn)) |
4751 | return 0; | |
4752 | ||
5ed58bb2 | 4753 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
4754 | count += func(clp, max - count); |
4755 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
4756 | break; |
4757 | } | |
65178db4 | 4758 | |
44e34da6 BS |
4759 | return count; |
4760 | } | |
4761 | ||
6c1e82a4 BS |
4762 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
4763 | { | |
4764 | struct nfs4_client *clp; | |
4765 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
4766 | ||
4767 | if (!nfsd_netns_ready(nn)) | |
4768 | return NULL; | |
4769 | ||
4770 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
4771 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
4772 | return clp; | |
4773 | } | |
4774 | return NULL; | |
4775 | } | |
4776 | ||
65178db4 BS |
4777 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
4778 | ||
ac4d8ff2 | 4779 | /* initialization to perform at module load time: */ |
1da177e4 | 4780 | |
72083396 | 4781 | void |
ac4d8ff2 | 4782 | nfs4_state_init(void) |
1da177e4 | 4783 | { |
72083396 | 4784 | int i; |
1da177e4 | 4785 | |
1da177e4 LT |
4786 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4787 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4788 | } | |
1da177e4 | 4789 | INIT_LIST_HEAD(&del_recall_lru); |
ac4d8ff2 N |
4790 | } |
4791 | ||
c2f1a551 MS |
4792 | /* |
4793 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4794 | * client may quite reasonably hang on to a delegation as long as it has | |
4795 | * the inode cached. This becomes an obvious problem the first time a | |
4796 | * client's inode cache approaches the size of the server's total memory. | |
4797 | * | |
4798 | * For now we avoid this problem by imposing a hard limit on the number | |
4799 | * of delegations, which varies according to the server's memory size. | |
4800 | */ | |
4801 | static void | |
4802 | set_max_delegations(void) | |
4803 | { | |
4804 | /* | |
4805 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4806 | * estimates suggest that in the worst case (where every delegation | |
4807 | * is for a different inode), a delegation could take about 1.5K, | |
4808 | * giving a worst case usage of about 6% of memory. | |
4809 | */ | |
4810 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4811 | } | |
4812 | ||
d85ed443 | 4813 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
4814 | { |
4815 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4816 | int i; | |
4817 | ||
4818 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
4819 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4820 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 4821 | goto err; |
0a7ec377 SK |
4822 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
4823 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4824 | if (!nn->unconf_id_hashtbl) | |
4825 | goto err_unconf_id; | |
9b531137 SK |
4826 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
4827 | OWNER_HASH_SIZE, GFP_KERNEL); | |
4828 | if (!nn->ownerstr_hashtbl) | |
4829 | goto err_ownerstr; | |
20e9e2bc SK |
4830 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
4831 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); | |
4832 | if (!nn->lockowner_ino_hashtbl) | |
4833 | goto err_lockowner_ino; | |
1872de0e SK |
4834 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
4835 | SESSION_HASH_SIZE, GFP_KERNEL); | |
4836 | if (!nn->sessionid_hashtbl) | |
4837 | goto err_sessionid; | |
8daae4dc | 4838 | |
382a62e7 | 4839 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 4840 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 4841 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 4842 | } |
9b531137 SK |
4843 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
4844 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
20e9e2bc SK |
4845 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4846 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); | |
1872de0e SK |
4847 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4848 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 4849 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 4850 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 4851 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 4852 | INIT_LIST_HEAD(&nn->close_lru); |
c9a49628 | 4853 | spin_lock_init(&nn->client_lock); |
8daae4dc | 4854 | |
09121281 | 4855 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 4856 | get_net(net); |
09121281 | 4857 | |
8daae4dc | 4858 | return 0; |
382a62e7 | 4859 | |
1872de0e SK |
4860 | err_sessionid: |
4861 | kfree(nn->lockowner_ino_hashtbl); | |
20e9e2bc SK |
4862 | err_lockowner_ino: |
4863 | kfree(nn->ownerstr_hashtbl); | |
9b531137 SK |
4864 | err_ownerstr: |
4865 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
4866 | err_unconf_id: |
4867 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
4868 | err: |
4869 | return -ENOMEM; | |
8daae4dc SK |
4870 | } |
4871 | ||
4872 | static void | |
4dce0ac9 | 4873 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
4874 | { |
4875 | int i; | |
4876 | struct nfs4_client *clp = NULL; | |
4877 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
a99454aa | 4878 | struct rb_node *node, *tmp; |
8daae4dc SK |
4879 | |
4880 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
4881 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
4882 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4883 | destroy_client(clp); | |
4884 | } | |
4885 | } | |
a99454aa SK |
4886 | |
4887 | node = rb_first(&nn->unconf_name_tree); | |
4888 | while (node != NULL) { | |
4889 | tmp = node; | |
4890 | node = rb_next(tmp); | |
4891 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
4892 | rb_erase(tmp, &nn->unconf_name_tree); | |
4893 | destroy_client(clp); | |
4894 | } | |
4895 | ||
1872de0e | 4896 | kfree(nn->sessionid_hashtbl); |
20e9e2bc | 4897 | kfree(nn->lockowner_ino_hashtbl); |
9b531137 | 4898 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 4899 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 4900 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 4901 | put_net(net); |
8daae4dc SK |
4902 | } |
4903 | ||
f252bc68 | 4904 | int |
d85ed443 | 4905 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 4906 | { |
5e1533c7 | 4907 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
4908 | int ret; |
4909 | ||
d85ed443 | 4910 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
4911 | if (ret) |
4912 | return ret; | |
5e1533c7 | 4913 | nfsd4_client_tracking_init(net); |
2c142baa | 4914 | nn->boot_time = get_seconds(); |
5ccb0066 | 4915 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 4916 | nn->grace_ended = false; |
d85ed443 | 4917 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
4918 | nn->nfsd4_grace, net); |
4919 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
4920 | return 0; |
4921 | } | |
4922 | ||
4923 | /* initialization to perform when the nfsd service is started: */ | |
4924 | ||
4925 | int | |
4926 | nfs4_state_start(void) | |
4927 | { | |
4928 | int ret; | |
4929 | ||
b5a1a81e | 4930 | ret = set_callback_cred(); |
d85ed443 SK |
4931 | if (ret) |
4932 | return -ENOMEM; | |
58da282b | 4933 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4934 | if (laundry_wq == NULL) { |
4935 | ret = -ENOMEM; | |
4936 | goto out_recovery; | |
4937 | } | |
b5a1a81e BF |
4938 | ret = nfsd4_create_callback_queue(); |
4939 | if (ret) | |
4940 | goto out_free_laundry; | |
09121281 | 4941 | |
c2f1a551 | 4942 | set_max_delegations(); |
d85ed443 | 4943 | |
b5a1a81e | 4944 | return 0; |
d85ed443 | 4945 | |
b5a1a81e BF |
4946 | out_free_laundry: |
4947 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4948 | out_recovery: |
b5a1a81e | 4949 | return ret; |
1da177e4 LT |
4950 | } |
4951 | ||
ac55fdc4 | 4952 | /* should be called with the state lock held */ |
f252bc68 | 4953 | void |
4dce0ac9 | 4954 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 4955 | { |
1da177e4 | 4956 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 4957 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 4958 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 4959 | |
4dce0ac9 SK |
4960 | cancel_delayed_work_sync(&nn->laundromat_work); |
4961 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 4962 | |
1da177e4 LT |
4963 | INIT_LIST_HEAD(&reaplist); |
4964 | spin_lock(&recall_lock); | |
4965 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4966 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4e37a7c2 SK |
4967 | if (dp->dl_stid.sc_client->net != net) |
4968 | continue; | |
1da177e4 LT |
4969 | list_move(&dp->dl_recall_lru, &reaplist); |
4970 | } | |
4971 | spin_unlock(&recall_lock); | |
4972 | list_for_each_safe(pos, next, &reaplist) { | |
4973 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4974 | unhash_delegation(dp); |
4975 | } | |
4976 | ||
3320fef1 | 4977 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 4978 | nfs4_state_destroy_net(net); |
1da177e4 LT |
4979 | } |
4980 | ||
4981 | void | |
4982 | nfs4_state_shutdown(void) | |
4983 | { | |
5e8d5c29 | 4984 | destroy_workqueue(laundry_wq); |
c3935e30 | 4985 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4986 | } |
8b70484c TM |
4987 | |
4988 | static void | |
4989 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4990 | { | |
37c593c5 TM |
4991 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4992 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4993 | } |
4994 | ||
4995 | static void | |
4996 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4997 | { | |
37c593c5 TM |
4998 | if (cstate->minorversion) { |
4999 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5000 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5001 | } | |
5002 | } | |
5003 | ||
5004 | void | |
5005 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5006 | { | |
5007 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5008 | } |
5009 | ||
62cd4a59 TM |
5010 | /* |
5011 | * functions to set current state id | |
5012 | */ | |
9428fe1a TM |
5013 | void |
5014 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5015 | { | |
5016 | put_stateid(cstate, &odp->od_stateid); | |
5017 | } | |
5018 | ||
8b70484c TM |
5019 | void |
5020 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5021 | { | |
5022 | put_stateid(cstate, &open->op_stateid); | |
5023 | } | |
5024 | ||
62cd4a59 TM |
5025 | void |
5026 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5027 | { | |
5028 | put_stateid(cstate, &close->cl_stateid); | |
5029 | } | |
5030 | ||
5031 | void | |
5032 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5033 | { | |
5034 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5035 | } | |
5036 | ||
5037 | /* | |
5038 | * functions to consume current state id | |
5039 | */ | |
1e97b519 | 5040 | |
9428fe1a TM |
5041 | void |
5042 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5043 | { | |
5044 | get_stateid(cstate, &odp->od_stateid); | |
5045 | } | |
5046 | ||
5047 | void | |
5048 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5049 | { | |
5050 | get_stateid(cstate, &drp->dr_stateid); | |
5051 | } | |
5052 | ||
1e97b519 TM |
5053 | void |
5054 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5055 | { | |
5056 | get_stateid(cstate, &fsp->fr_stateid); | |
5057 | } | |
5058 | ||
5059 | void | |
5060 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5061 | { | |
5062 | get_stateid(cstate, &setattr->sa_stateid); | |
5063 | } | |
5064 | ||
8b70484c TM |
5065 | void |
5066 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5067 | { | |
5068 | get_stateid(cstate, &close->cl_stateid); | |
5069 | } | |
5070 | ||
5071 | void | |
62cd4a59 | 5072 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5073 | { |
62cd4a59 | 5074 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5075 | } |
30813e27 TM |
5076 | |
5077 | void | |
5078 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5079 | { | |
5080 | get_stateid(cstate, &read->rd_stateid); | |
5081 | } | |
5082 | ||
5083 | void | |
5084 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5085 | { | |
5086 | get_stateid(cstate, &write->wr_stateid); | |
5087 | } |