Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
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; |
c2f1a551 | 154 | unsigned int 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 | ||
6136d2b4 | 233 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 234 | { |
6136d2b4 | 235 | static int min_stateid = 0; |
38c2f4b1 | 236 | struct idr *stateids = &stid->sc_client->cl_stateids; |
6136d2b4 BF |
237 | int new_stid; |
238 | int error; | |
239 | ||
38c2f4b1 | 240 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
6136d2b4 | 241 | /* |
996e0938 BF |
242 | * Note: the necessary preallocation was done in |
243 | * nfs4_alloc_stateid(). The idr code caps the number of | |
244 | * preallocations that can exist at a time, but the state lock | |
245 | * prevents anyone from using ours before we get here: | |
6136d2b4 | 246 | */ |
063b0fb9 | 247 | WARN_ON_ONCE(error); |
6136d2b4 BF |
248 | /* |
249 | * It shouldn't be a problem to reuse an opaque stateid value. | |
250 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
251 | * example, a stray write retransmission could be accepted by | |
252 | * the server when it should have been rejected. Therefore, | |
253 | * adopt a trick from the sctp code to attempt to maximize the | |
254 | * amount of time until an id is reused, by ensuring they always | |
255 | * "increase" (mod INT_MAX): | |
256 | */ | |
36d44c60 | 257 | |
6136d2b4 BF |
258 | min_stateid = new_stid+1; |
259 | if (min_stateid == INT_MAX) | |
260 | min_stateid = 0; | |
261 | return new_stid; | |
36d44c60 BF |
262 | } |
263 | ||
3abdb607 BF |
264 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
265 | kmem_cache *slab) | |
2a74aba7 | 266 | { |
3abdb607 BF |
267 | struct idr *stateids = &cl->cl_stateids; |
268 | static int min_stateid = 0; | |
269 | struct nfs4_stid *stid; | |
6136d2b4 | 270 | int new_id; |
2a74aba7 | 271 | |
3abdb607 BF |
272 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
273 | if (!stid) | |
274 | return NULL; | |
275 | ||
276 | if (!idr_pre_get(stateids, GFP_KERNEL)) | |
277 | goto out_free; | |
278 | if (idr_get_new_above(stateids, stid, min_stateid, &new_id)) | |
279 | goto out_free; | |
2a74aba7 | 280 | stid->sc_client = cl; |
3abdb607 BF |
281 | stid->sc_type = 0; |
282 | stid->sc_stateid.si_opaque.so_id = new_id; | |
283 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 284 | /* Will be incremented before return to client: */ |
3abdb607 | 285 | stid->sc_stateid.si_generation = 0; |
996e0938 | 286 | |
996e0938 | 287 | /* |
3abdb607 BF |
288 | * It shouldn't be a problem to reuse an opaque stateid value. |
289 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
290 | * example, a stray write retransmission could be accepted by | |
291 | * the server when it should have been rejected. Therefore, | |
292 | * adopt a trick from the sctp code to attempt to maximize the | |
293 | * amount of time until an id is reused, by ensuring they always | |
294 | * "increase" (mod INT_MAX): | |
996e0938 | 295 | */ |
3abdb607 BF |
296 | |
297 | min_stateid = new_id+1; | |
298 | if (min_stateid == INT_MAX) | |
299 | min_stateid = 0; | |
300 | return stid; | |
301 | out_free: | |
302 | kfree(stid); | |
303 | return NULL; | |
2a74aba7 BF |
304 | } |
305 | ||
4cdc951b BF |
306 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
307 | { | |
308 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
309 | } | |
310 | ||
1da177e4 | 311 | static struct nfs4_delegation * |
dcef0413 | 312 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
313 | { |
314 | struct nfs4_delegation *dp; | |
315 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
316 | |
317 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
318 | /* |
319 | * Major work on the lease subsystem (for example, to support | |
320 | * calbacks on stat) will be required before we can support | |
321 | * write delegations properly. | |
322 | */ | |
323 | if (type != NFS4_OPEN_DELEGATE_READ) | |
324 | return NULL; | |
47f9940c MS |
325 | if (fp->fi_had_conflict) |
326 | return NULL; | |
c2f1a551 | 327 | if (num_delegations > max_delegations) |
ef0f3390 | 328 | return NULL; |
996e0938 | 329 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 330 | if (dp == NULL) |
1da177e4 | 331 | return dp; |
3abdb607 | 332 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
2a74aba7 BF |
333 | /* |
334 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
335 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
336 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
337 | */ |
338 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 339 | num_delegations++; |
ea1da636 N |
340 | INIT_LIST_HEAD(&dp->dl_perfile); |
341 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 342 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 343 | get_nfs4_file(fp); |
1da177e4 | 344 | dp->dl_file = fp; |
1da177e4 | 345 | dp->dl_type = type; |
6c02eaa1 | 346 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
347 | dp->dl_time = 0; |
348 | atomic_set(&dp->dl_count, 1); | |
57725155 | 349 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
350 | return dp; |
351 | } | |
352 | ||
3abdb607 BF |
353 | void free_stid(struct nfs4_stid *s, struct kmem_cache *slab) |
354 | { | |
355 | struct idr *stateids = &s->sc_client->cl_stateids; | |
356 | ||
357 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
358 | kmem_cache_free(slab, s); | |
359 | } | |
360 | ||
1da177e4 LT |
361 | void |
362 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
363 | { | |
364 | if (atomic_dec_and_test(&dp->dl_count)) { | |
365 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 366 | put_nfs4_file(dp->dl_file); |
3abdb607 | 367 | free_stid(&dp->dl_stid, deleg_slab); |
ef0f3390 | 368 | num_delegations--; |
1da177e4 LT |
369 | } |
370 | } | |
371 | ||
acfdf5c3 | 372 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 373 | { |
acfdf5c3 BF |
374 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
375 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
376 | fp->fi_lease = NULL; | |
4ee63624 | 377 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
378 | fp->fi_deleg_file = NULL; |
379 | } | |
1da177e4 LT |
380 | } |
381 | ||
6136d2b4 BF |
382 | static void unhash_stid(struct nfs4_stid *s) |
383 | { | |
3abdb607 | 384 | s->sc_type = 0; |
6136d2b4 BF |
385 | } |
386 | ||
1da177e4 LT |
387 | /* Called under the state lock. */ |
388 | static void | |
389 | unhash_delegation(struct nfs4_delegation *dp) | |
390 | { | |
6136d2b4 | 391 | unhash_stid(&dp->dl_stid); |
ea1da636 | 392 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 393 | spin_lock(&recall_lock); |
5d926e8c | 394 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
395 | list_del_init(&dp->dl_recall_lru); |
396 | spin_unlock(&recall_lock); | |
acfdf5c3 | 397 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
398 | nfs4_put_delegation(dp); |
399 | } | |
400 | ||
401 | /* | |
402 | * SETCLIENTID state | |
403 | */ | |
404 | ||
ddc04c41 BF |
405 | static unsigned int clientid_hashval(u32 id) |
406 | { | |
407 | return id & CLIENT_HASH_MASK; | |
408 | } | |
409 | ||
410 | static unsigned int clientstr_hashval(const char *name) | |
411 | { | |
412 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
413 | } | |
414 | ||
f9d7562f BF |
415 | /* |
416 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
417 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
418 | * only what share bits are currently in force, but also what | |
419 | * combinations of share bits previous opens have used. This allows us | |
420 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
421 | * return an error if the client attempt to downgrade to a combination | |
422 | * of share bits not explicable by closing some of its previous opens. | |
423 | * | |
424 | * XXX: This enforcement is actually incomplete, since we don't keep | |
425 | * track of access/deny bit combinations; so, e.g., we allow: | |
426 | * | |
427 | * OPEN allow read, deny write | |
428 | * OPEN allow both, deny none | |
429 | * DOWNGRADE allow read, deny none | |
430 | * | |
431 | * which we should reject. | |
432 | */ | |
5ae037e5 JL |
433 | static unsigned int |
434 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 435 | int i; |
5ae037e5 | 436 | unsigned int access = 0; |
f9d7562f | 437 | |
f9d7562f BF |
438 | for (i = 1; i < 4; i++) { |
439 | if (test_bit(i, &bmap)) | |
5ae037e5 | 440 | access |= i; |
f9d7562f | 441 | } |
5ae037e5 | 442 | return access; |
f9d7562f BF |
443 | } |
444 | ||
3a328614 | 445 | static bool |
dcef0413 | 446 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
447 | unsigned int access, deny; |
448 | ||
5ae037e5 JL |
449 | access = bmap_to_share_mode(stp->st_access_bmap); |
450 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 451 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
452 | return false; |
453 | return true; | |
f9d7562f BF |
454 | } |
455 | ||
82c5ff1b JL |
456 | /* set share access for a given stateid */ |
457 | static inline void | |
458 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
459 | { | |
460 | __set_bit(access, &stp->st_access_bmap); | |
461 | } | |
462 | ||
463 | /* clear share access for a given stateid */ | |
464 | static inline void | |
465 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
466 | { | |
467 | __clear_bit(access, &stp->st_access_bmap); | |
468 | } | |
469 | ||
470 | /* test whether a given stateid has access */ | |
471 | static inline bool | |
472 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
473 | { | |
474 | return test_bit(access, &stp->st_access_bmap); | |
475 | } | |
476 | ||
ce0fc43c JL |
477 | /* set share deny for a given stateid */ |
478 | static inline void | |
479 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
480 | { | |
481 | __set_bit(access, &stp->st_deny_bmap); | |
482 | } | |
483 | ||
484 | /* clear share deny for a given stateid */ | |
485 | static inline void | |
486 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
487 | { | |
488 | __clear_bit(access, &stp->st_deny_bmap); | |
489 | } | |
490 | ||
491 | /* test whether a given stateid is denying specific access */ | |
492 | static inline bool | |
493 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
494 | { | |
495 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
496 | } |
497 | ||
498 | static int nfs4_access_to_omode(u32 access) | |
499 | { | |
8f34a430 | 500 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
501 | case NFS4_SHARE_ACCESS_READ: |
502 | return O_RDONLY; | |
503 | case NFS4_SHARE_ACCESS_WRITE: | |
504 | return O_WRONLY; | |
505 | case NFS4_SHARE_ACCESS_BOTH: | |
506 | return O_RDWR; | |
507 | } | |
063b0fb9 BF |
508 | WARN_ON_ONCE(1); |
509 | return O_RDONLY; | |
f9d7562f BF |
510 | } |
511 | ||
82c5ff1b JL |
512 | /* release all access and file references for a given stateid */ |
513 | static void | |
514 | release_all_access(struct nfs4_ol_stateid *stp) | |
515 | { | |
516 | int i; | |
517 | ||
518 | for (i = 1; i < 4; i++) { | |
519 | if (test_access(i, stp)) | |
520 | nfs4_file_put_access(stp->st_file, | |
521 | nfs4_access_to_omode(i)); | |
522 | clear_access(i, stp); | |
523 | } | |
524 | } | |
525 | ||
dcef0413 | 526 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 527 | { |
529d7b2a BF |
528 | list_del(&stp->st_perfile); |
529 | list_del(&stp->st_perstateowner); | |
530 | } | |
531 | ||
dcef0413 | 532 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 533 | { |
82c5ff1b | 534 | release_all_access(stp); |
a96e5b90 | 535 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
536 | stp->st_file = NULL; |
537 | } | |
538 | ||
dcef0413 | 539 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 540 | { |
3abdb607 | 541 | free_stid(&stp->st_stid, stateid_slab); |
529d7b2a BF |
542 | } |
543 | ||
dcef0413 | 544 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
545 | { |
546 | struct file *file; | |
547 | ||
548 | unhash_generic_stateid(stp); | |
6136d2b4 | 549 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
550 | file = find_any_file(stp->st_file); |
551 | if (file) | |
fe0750e5 | 552 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 553 | close_generic_stateid(stp); |
529d7b2a BF |
554 | free_generic_stateid(stp); |
555 | } | |
556 | ||
fe0750e5 | 557 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 558 | { |
dcef0413 | 559 | struct nfs4_ol_stateid *stp; |
529d7b2a | 560 | |
fe0750e5 BF |
561 | list_del(&lo->lo_owner.so_strhash); |
562 | list_del(&lo->lo_perstateid); | |
009673b4 | 563 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
564 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
565 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 566 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
567 | release_lock_stateid(stp); |
568 | } | |
569 | } | |
570 | ||
fe0750e5 | 571 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 572 | { |
fe0750e5 BF |
573 | unhash_lockowner(lo); |
574 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
575 | } |
576 | ||
577 | static void | |
dcef0413 | 578 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 579 | { |
fe0750e5 | 580 | struct nfs4_lockowner *lo; |
529d7b2a BF |
581 | |
582 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
583 | lo = list_entry(open_stp->st_lockowners.next, |
584 | struct nfs4_lockowner, lo_perstateid); | |
585 | release_lockowner(lo); | |
529d7b2a BF |
586 | } |
587 | } | |
588 | ||
38c387b5 | 589 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
590 | { |
591 | unhash_generic_stateid(stp); | |
592 | release_stateid_lockowners(stp); | |
38c387b5 BF |
593 | close_generic_stateid(stp); |
594 | } | |
595 | ||
596 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
597 | { | |
598 | unhash_open_stateid(stp); | |
6136d2b4 | 599 | unhash_stid(&stp->st_stid); |
2283963f BF |
600 | free_generic_stateid(stp); |
601 | } | |
602 | ||
fe0750e5 | 603 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 604 | { |
dcef0413 | 605 | struct nfs4_ol_stateid *stp; |
f1d110ca | 606 | |
fe0750e5 BF |
607 | list_del(&oo->oo_owner.so_strhash); |
608 | list_del(&oo->oo_perclient); | |
609 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
610 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 611 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 612 | release_open_stateid(stp); |
f1d110ca BF |
613 | } |
614 | } | |
615 | ||
f7a4d872 BF |
616 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
617 | { | |
618 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
619 | ||
620 | if (s) { | |
6136d2b4 | 621 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
622 | free_generic_stateid(s); |
623 | oo->oo_last_closed_stid = NULL; | |
624 | } | |
625 | } | |
626 | ||
fe0750e5 | 627 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 628 | { |
fe0750e5 BF |
629 | unhash_openowner(oo); |
630 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 631 | release_last_closed_stateid(oo); |
fe0750e5 | 632 | nfs4_free_openowner(oo); |
f1d110ca BF |
633 | } |
634 | ||
5282fd72 ME |
635 | static inline int |
636 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
637 | { | |
638 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
639 | ||
640 | return sid->sequence % SESSION_HASH_SIZE; | |
641 | } | |
642 | ||
8f199b82 | 643 | #ifdef NFSD_DEBUG |
5282fd72 ME |
644 | static inline void |
645 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
646 | { | |
647 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
648 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
649 | } | |
8f199b82 TM |
650 | #else |
651 | static inline void | |
652 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
653 | { | |
654 | } | |
655 | #endif | |
656 | ||
5282fd72 | 657 | |
ec6b5d7b AA |
658 | static void |
659 | gen_sessionid(struct nfsd4_session *ses) | |
660 | { | |
661 | struct nfs4_client *clp = ses->se_client; | |
662 | struct nfsd4_sessionid *sid; | |
663 | ||
664 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
665 | sid->clientid = clp->cl_clientid; | |
666 | sid->sequence = current_sessionid++; | |
667 | sid->reserved = 0; | |
668 | } | |
669 | ||
670 | /* | |
a649637c AA |
671 | * The protocol defines ca_maxresponssize_cached to include the size of |
672 | * the rpc header, but all we need to cache is the data starting after | |
673 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
674 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
675 | * value that is the number of bytes in our cache plus a few additional | |
676 | * bytes. In order to stay on the safe side, and not promise more than | |
677 | * we can cache, those additional bytes must be the minimum possible: 24 | |
678 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
679 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
680 | * for the SEQUENCE op response: | |
681 | */ | |
682 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
683 | ||
557ce264 AA |
684 | static void |
685 | free_session_slots(struct nfsd4_session *ses) | |
686 | { | |
687 | int i; | |
688 | ||
689 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
690 | kfree(ses->se_slots[i]); | |
691 | } | |
692 | ||
a649637c | 693 | /* |
efe0cb6d BF |
694 | * We don't actually need to cache the rpc and session headers, so we |
695 | * can allocate a little less for each slot: | |
696 | */ | |
697 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
698 | { | |
699 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
700 | } | |
701 | ||
5b6feee9 | 702 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 703 | { |
5b6feee9 BF |
704 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
705 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 706 | |
5b6feee9 BF |
707 | return size; |
708 | } | |
ec6b5d7b | 709 | |
5b6feee9 BF |
710 | /* |
711 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 712 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 713 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 714 | */ |
5b6feee9 | 715 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 716 | { |
5b6feee9 | 717 | int avail; |
ec6b5d7b | 718 | |
5b6feee9 | 719 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 720 | |
5b6feee9 BF |
721 | spin_lock(&nfsd_drc_lock); |
722 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
723 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
724 | num = min_t(int, num, avail / slotsize); | |
725 | nfsd_drc_mem_used += num * slotsize; | |
726 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 727 | |
5b6feee9 BF |
728 | return num; |
729 | } | |
ec6b5d7b | 730 | |
5b6feee9 BF |
731 | static void nfsd4_put_drc_mem(int slotsize, int num) |
732 | { | |
4bd9b0f4 | 733 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 734 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 735 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 736 | } |
ec6b5d7b | 737 | |
a827bcb2 | 738 | static struct nfsd4_session *__alloc_session(int slotsize, int numslots) |
5b6feee9 BF |
739 | { |
740 | struct nfsd4_session *new; | |
741 | int mem, i; | |
a649637c | 742 | |
5b6feee9 BF |
743 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
744 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
745 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 746 | |
5b6feee9 BF |
747 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
748 | if (!new) | |
749 | return NULL; | |
557ce264 | 750 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
751 | for (i = 0; i < numslots; i++) { |
752 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
753 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
754 | if (!new->se_slots[i]) | |
557ce264 | 755 | goto out_free; |
557ce264 | 756 | } |
5b6feee9 BF |
757 | return new; |
758 | out_free: | |
759 | while (i--) | |
760 | kfree(new->se_slots[i]); | |
761 | kfree(new); | |
762 | return NULL; | |
ec6b5d7b AA |
763 | } |
764 | ||
9dd9845f SK |
765 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, |
766 | struct nfsd4_channel_attrs *req, | |
767 | int numslots, int slotsize, | |
768 | struct nfsd_net *nn) | |
ec6b5d7b | 769 | { |
9dd9845f | 770 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
ec6b5d7b | 771 | |
5b6feee9 | 772 | new->maxreqs = numslots; |
d2b21743 MJ |
773 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
774 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
775 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
776 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
777 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
778 | } | |
ec6b5d7b | 779 | |
19cf5c02 BF |
780 | static void free_conn(struct nfsd4_conn *c) |
781 | { | |
782 | svc_xprt_put(c->cn_xprt); | |
783 | kfree(c); | |
784 | } | |
ec6b5d7b | 785 | |
19cf5c02 BF |
786 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
787 | { | |
788 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
789 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 790 | |
19cf5c02 BF |
791 | spin_lock(&clp->cl_lock); |
792 | if (!list_empty(&c->cn_persession)) { | |
793 | list_del(&c->cn_persession); | |
794 | free_conn(c); | |
795 | } | |
796 | spin_unlock(&clp->cl_lock); | |
eea49806 | 797 | nfsd4_probe_callback(clp); |
19cf5c02 | 798 | } |
ec6b5d7b | 799 | |
d29c374c | 800 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 801 | { |
c7662518 | 802 | struct nfsd4_conn *conn; |
ec6b5d7b | 803 | |
c7662518 BF |
804 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
805 | if (!conn) | |
db90681d | 806 | return NULL; |
c7662518 BF |
807 | svc_xprt_get(rqstp->rq_xprt); |
808 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 809 | conn->cn_flags = flags; |
db90681d BF |
810 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
811 | return conn; | |
812 | } | |
a649637c | 813 | |
328ead28 BF |
814 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
815 | { | |
816 | conn->cn_session = ses; | |
817 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
818 | } |
819 | ||
db90681d | 820 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 821 | { |
db90681d | 822 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 823 | |
c7662518 | 824 | spin_lock(&clp->cl_lock); |
328ead28 | 825 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 826 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
827 | } |
828 | ||
21b75b01 | 829 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 830 | { |
19cf5c02 | 831 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 832 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
833 | } |
834 | ||
e1ff371f | 835 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 836 | { |
21b75b01 | 837 | int ret; |
ec6b5d7b | 838 | |
db90681d | 839 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
840 | ret = nfsd4_register_conn(conn); |
841 | if (ret) | |
842 | /* oops; xprt is already down: */ | |
843 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 844 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
845 | /* callback channel may be back up */ |
846 | nfsd4_probe_callback(ses->se_client); | |
847 | } | |
c7662518 | 848 | } |
ec6b5d7b | 849 | |
e1ff371f | 850 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
851 | { |
852 | u32 dir = NFS4_CDFC4_FORE; | |
853 | ||
e1ff371f | 854 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 855 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 856 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
857 | } |
858 | ||
859 | /* must be called under client_lock */ | |
19cf5c02 | 860 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 861 | { |
19cf5c02 BF |
862 | struct nfs4_client *clp = s->se_client; |
863 | struct nfsd4_conn *c; | |
ec6b5d7b | 864 | |
19cf5c02 BF |
865 | spin_lock(&clp->cl_lock); |
866 | while (!list_empty(&s->se_conns)) { | |
867 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
868 | list_del_init(&c->cn_persession); | |
869 | spin_unlock(&clp->cl_lock); | |
557ce264 | 870 | |
19cf5c02 BF |
871 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
872 | free_conn(c); | |
ec6b5d7b | 873 | |
19cf5c02 BF |
874 | spin_lock(&clp->cl_lock); |
875 | } | |
876 | spin_unlock(&clp->cl_lock); | |
c7662518 | 877 | } |
ec6b5d7b | 878 | |
1377b69e BF |
879 | static void __free_session(struct nfsd4_session *ses) |
880 | { | |
881 | nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); | |
882 | free_session_slots(ses); | |
883 | kfree(ses); | |
884 | } | |
885 | ||
508dc6e1 | 886 | static void free_session(struct kref *kref) |
c7662518 BF |
887 | { |
888 | struct nfsd4_session *ses; | |
c9a49628 | 889 | struct nfsd_net *nn; |
c7662518 BF |
890 | |
891 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
c9a49628 SK |
892 | nn = net_generic(ses->se_client->net, nfsd_net_id); |
893 | ||
894 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 895 | nfsd4_del_conns(ses); |
1377b69e | 896 | __free_session(ses); |
c7662518 BF |
897 | } |
898 | ||
508dc6e1 BH |
899 | void nfsd4_put_session(struct nfsd4_session *ses) |
900 | { | |
c9a49628 SK |
901 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
902 | ||
903 | spin_lock(&nn->client_lock); | |
508dc6e1 | 904 | nfsd4_put_session_locked(ses); |
c9a49628 | 905 | spin_unlock(&nn->client_lock); |
508dc6e1 BH |
906 | } |
907 | ||
9dd9845f SK |
908 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan, |
909 | struct nfsd_net *nn) | |
5b6feee9 BF |
910 | { |
911 | struct nfsd4_session *new; | |
5b6feee9 | 912 | int numslots, slotsize; |
5b6feee9 BF |
913 | /* |
914 | * Note decreasing slot size below client's request may | |
915 | * make it difficult for client to function correctly, whereas | |
916 | * decreasing the number of slots will (just?) affect | |
917 | * performance. When short on memory we therefore prefer to | |
918 | * decrease number of slots instead of their size. | |
919 | */ | |
920 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
921 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
922 | if (numslots < 1) |
923 | return NULL; | |
5b6feee9 | 924 | |
a827bcb2 | 925 | new = __alloc_session(slotsize, numslots); |
5b6feee9 | 926 | if (!new) { |
74b70dde | 927 | nfsd4_put_drc_mem(slotsize, numslots); |
ac7c46f2 | 928 | return NULL; |
557ce264 | 929 | } |
9dd9845f | 930 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize, nn); |
a827bcb2 BF |
931 | return new; |
932 | } | |
557ce264 | 933 | |
135ae827 | 934 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 935 | { |
a827bcb2 | 936 | int idx; |
1872de0e | 937 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 938 | |
ec6b5d7b AA |
939 | new->se_client = clp; |
940 | gen_sessionid(new); | |
ec6b5d7b | 941 | |
c7662518 BF |
942 | INIT_LIST_HEAD(&new->se_conns); |
943 | ||
ac7c46f2 | 944 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 945 | new->se_flags = cses->flags; |
8b5ce5cd | 946 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 947 | new->se_cb_sec = cses->cb_sec; |
ec6b5d7b | 948 | kref_init(&new->se_ref); |
5b6feee9 | 949 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 950 | spin_lock(&nn->client_lock); |
1872de0e | 951 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 952 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 953 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 954 | spin_unlock(&clp->cl_lock); |
c9a49628 | 955 | spin_unlock(&nn->client_lock); |
ec6b5d7b | 956 | |
dcbeaa68 | 957 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 958 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
959 | /* |
960 | * This is a little silly; with sessions there's no real | |
961 | * use for the callback address. Use the peer address | |
962 | * as a reasonable default for now, but consider fixing | |
963 | * the rpc client not to require an address in the | |
964 | * future: | |
965 | */ | |
edd76786 BF |
966 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
967 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 968 | } |
ec6b5d7b AA |
969 | } |
970 | ||
9089f1b4 | 971 | /* caller must hold client_lock */ |
5282fd72 | 972 | static struct nfsd4_session * |
1872de0e | 973 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
974 | { |
975 | struct nfsd4_session *elem; | |
976 | int idx; | |
1872de0e | 977 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
978 | |
979 | dump_sessionid(__func__, sessionid); | |
980 | idx = hash_sessionid(sessionid); | |
5282fd72 | 981 | /* Search in the appropriate list */ |
1872de0e | 982 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
983 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
984 | NFS4_MAX_SESSIONID_LEN)) { | |
985 | return elem; | |
986 | } | |
987 | } | |
988 | ||
989 | dprintk("%s: session not found\n", __func__); | |
990 | return NULL; | |
991 | } | |
992 | ||
9089f1b4 | 993 | /* caller must hold client_lock */ |
7116ed6b | 994 | static void |
5282fd72 | 995 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
996 | { |
997 | list_del(&ses->se_hash); | |
4c649378 | 998 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 999 | list_del(&ses->se_perclnt); |
4c649378 | 1000 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1001 | } |
1002 | ||
36acb66b | 1003 | /* must be called under the client_lock */ |
1da177e4 | 1004 | static inline void |
36acb66b | 1005 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 1006 | { |
5ed58bb2 SK |
1007 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1008 | ||
07cd4909 | 1009 | if (is_client_expired(clp)) { |
7447758b BF |
1010 | WARN_ON(1); |
1011 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
07cd4909 BH |
1012 | __func__, |
1013 | clp->cl_clientid.cl_boot, | |
1014 | clp->cl_clientid.cl_id); | |
1015 | return; | |
1016 | } | |
1017 | ||
1da177e4 LT |
1018 | dprintk("renewing client (clientid %08x/%08x)\n", |
1019 | clp->cl_clientid.cl_boot, | |
1020 | clp->cl_clientid.cl_id); | |
5ed58bb2 | 1021 | list_move_tail(&clp->cl_lru, &nn->client_lru); |
1da177e4 LT |
1022 | clp->cl_time = get_seconds(); |
1023 | } | |
1024 | ||
36acb66b BH |
1025 | static inline void |
1026 | renew_client(struct nfs4_client *clp) | |
1027 | { | |
c9a49628 SK |
1028 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1029 | ||
1030 | spin_lock(&nn->client_lock); | |
36acb66b | 1031 | renew_client_locked(clp); |
c9a49628 | 1032 | spin_unlock(&nn->client_lock); |
36acb66b BH |
1033 | } |
1034 | ||
1da177e4 LT |
1035 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1036 | static int | |
2c142baa | 1037 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1038 | { |
2c142baa | 1039 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1040 | return 0; |
60adfc50 | 1041 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1042 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1043 | return 1; |
1044 | } | |
1045 | ||
1046 | /* | |
1047 | * XXX Should we use a slab cache ? | |
1048 | * This type of memory management is somewhat inefficient, but we use it | |
1049 | * anyway since SETCLIENTID is not a common operation. | |
1050 | */ | |
35bba9a3 | 1051 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1052 | { |
1053 | struct nfs4_client *clp; | |
1054 | ||
35bba9a3 BF |
1055 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1056 | if (clp == NULL) | |
1057 | return NULL; | |
67114fe6 | 1058 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1059 | if (clp->cl_name.data == NULL) { |
1060 | kfree(clp); | |
1061 | return NULL; | |
1da177e4 | 1062 | } |
35bba9a3 | 1063 | clp->cl_name.len = name.len; |
1da177e4 LT |
1064 | return clp; |
1065 | } | |
1066 | ||
1067 | static inline void | |
1068 | free_client(struct nfs4_client *clp) | |
1069 | { | |
bca0ec65 | 1070 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1071 | |
1072 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1073 | while (!list_empty(&clp->cl_sessions)) { |
1074 | struct nfsd4_session *ses; | |
1075 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1076 | se_perclnt); | |
1077 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1078 | nfsd4_put_session_locked(ses); |
792c95dd | 1079 | } |
03a4e1f6 | 1080 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1081 | kfree(clp->cl_name.data); |
2d32b29a | 1082 | idr_remove_all(&clp->cl_stateids); |
1083 | idr_destroy(&clp->cl_stateids); | |
1da177e4 LT |
1084 | kfree(clp); |
1085 | } | |
1086 | ||
d7682988 BH |
1087 | void |
1088 | release_session_client(struct nfsd4_session *session) | |
1089 | { | |
1090 | struct nfs4_client *clp = session->se_client; | |
c9a49628 | 1091 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
d7682988 | 1092 | |
c9a49628 | 1093 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
d7682988 BH |
1094 | return; |
1095 | if (is_client_expired(clp)) { | |
1096 | free_client(clp); | |
1097 | session->se_client = NULL; | |
1098 | } else | |
1099 | renew_client_locked(clp); | |
c9a49628 | 1100 | spin_unlock(&nn->client_lock); |
d7682988 BH |
1101 | } |
1102 | ||
84d38ac9 BH |
1103 | /* must be called under the client_lock */ |
1104 | static inline void | |
1105 | unhash_client_locked(struct nfs4_client *clp) | |
1106 | { | |
792c95dd BF |
1107 | struct nfsd4_session *ses; |
1108 | ||
07cd4909 | 1109 | mark_client_expired(clp); |
84d38ac9 | 1110 | list_del(&clp->cl_lru); |
4c649378 | 1111 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1112 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1113 | list_del_init(&ses->se_hash); | |
4c649378 | 1114 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1115 | } |
1116 | ||
1da177e4 | 1117 | static void |
0d22f68f | 1118 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1119 | { |
fe0750e5 | 1120 | struct nfs4_openowner *oo; |
1da177e4 | 1121 | struct nfs4_delegation *dp; |
1da177e4 | 1122 | struct list_head reaplist; |
382a62e7 | 1123 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1124 | |
1da177e4 LT |
1125 | INIT_LIST_HEAD(&reaplist); |
1126 | spin_lock(&recall_lock); | |
ea1da636 N |
1127 | while (!list_empty(&clp->cl_delegations)) { |
1128 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1129 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1130 | list_move(&dp->dl_recall_lru, &reaplist); |
1131 | } | |
1132 | spin_unlock(&recall_lock); | |
1133 | while (!list_empty(&reaplist)) { | |
1134 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1135 | unhash_delegation(dp); |
1136 | } | |
ea1da636 | 1137 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1138 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1139 | release_openowner(oo); | |
1da177e4 | 1140 | } |
6ff8da08 | 1141 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1142 | if (clp->cl_cb_conn.cb_xprt) |
1143 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1144 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1145 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1146 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1147 | else |
a99454aa | 1148 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1149 | spin_lock(&nn->client_lock); |
84d38ac9 | 1150 | unhash_client_locked(clp); |
46583e25 BH |
1151 | if (atomic_read(&clp->cl_refcount) == 0) |
1152 | free_client(clp); | |
c9a49628 | 1153 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1154 | } |
1155 | ||
0d22f68f BF |
1156 | static void expire_client(struct nfs4_client *clp) |
1157 | { | |
1158 | nfsd4_client_record_remove(clp); | |
1159 | destroy_client(clp); | |
1160 | } | |
1161 | ||
35bba9a3 BF |
1162 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1163 | { | |
1164 | memcpy(target->cl_verifier.data, source->data, | |
1165 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1166 | } |
1167 | ||
35bba9a3 BF |
1168 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1169 | { | |
1da177e4 LT |
1170 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1171 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1172 | } | |
1173 | ||
03a4e1f6 | 1174 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1175 | { |
03a4e1f6 BF |
1176 | if (source->cr_principal) { |
1177 | target->cr_principal = | |
1178 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1179 | if (target->cr_principal == NULL) | |
1180 | return -ENOMEM; | |
1181 | } else | |
1182 | target->cr_principal = NULL; | |
d5497fc6 | 1183 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1184 | target->cr_uid = source->cr_uid; |
1185 | target->cr_gid = source->cr_gid; | |
1186 | target->cr_group_info = source->cr_group_info; | |
1187 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1188 | return 0; |
1da177e4 LT |
1189 | } |
1190 | ||
ac55fdc4 JL |
1191 | static long long |
1192 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1193 | { | |
1194 | long long res; | |
1195 | ||
1196 | res = o1->len - o2->len; | |
1197 | if (res) | |
1198 | return res; | |
1199 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1200 | } | |
1201 | ||
35bba9a3 | 1202 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1203 | { |
a55370a3 | 1204 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1205 | } |
1206 | ||
1207 | static int | |
599e0a22 BF |
1208 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1209 | { | |
1210 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1211 | } |
1212 | ||
1213 | static int | |
599e0a22 BF |
1214 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1215 | { | |
1216 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1217 | } |
1218 | ||
8fbba96e BF |
1219 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1220 | { | |
1221 | int i; | |
1222 | ||
1223 | if (g1->ngroups != g2->ngroups) | |
1224 | return false; | |
1225 | for (i=0; i<g1->ngroups; i++) | |
1226 | if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) | |
1227 | return false; | |
1228 | return true; | |
1229 | } | |
1230 | ||
68eb3508 BF |
1231 | /* |
1232 | * RFC 3530 language requires clid_inuse be returned when the | |
1233 | * "principal" associated with a requests differs from that previously | |
1234 | * used. We use uid, gid's, and gss principal string as our best | |
1235 | * approximation. We also don't want to allow non-gss use of a client | |
1236 | * established using gss: in theory cr_principal should catch that | |
1237 | * change, but in practice cr_principal can be null even in the gss case | |
1238 | * since gssd doesn't always pass down a principal string. | |
1239 | */ | |
1240 | static bool is_gss_cred(struct svc_cred *cr) | |
1241 | { | |
1242 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1243 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1244 | } | |
1245 | ||
1246 | ||
5559b50a | 1247 | static bool |
599e0a22 BF |
1248 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1249 | { | |
68eb3508 | 1250 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
d5497fc6 | 1251 | || (cr1->cr_uid != cr2->cr_uid) |
8fbba96e BF |
1252 | || (cr1->cr_gid != cr2->cr_gid) |
1253 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) | |
1254 | return false; | |
1255 | if (cr1->cr_principal == cr2->cr_principal) | |
1256 | return true; | |
1257 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1258 | return false; | |
5559b50a | 1259 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1260 | } |
1261 | ||
c212cecf | 1262 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1263 | { |
1264 | static u32 current_clientid = 1; | |
1265 | ||
2c142baa | 1266 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1267 | clp->cl_clientid.cl_id = current_clientid++; |
1268 | } | |
1269 | ||
deda2faa BF |
1270 | static void gen_confirm(struct nfs4_client *clp) |
1271 | { | |
ab4684d1 | 1272 | __be32 verf[2]; |
deda2faa | 1273 | static u32 i; |
1da177e4 | 1274 | |
ab4684d1 CL |
1275 | verf[0] = (__be32)get_seconds(); |
1276 | verf[1] = (__be32)i++; | |
1277 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1278 | } |
1279 | ||
38c2f4b1 | 1280 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1281 | { |
3abdb607 BF |
1282 | struct nfs4_stid *ret; |
1283 | ||
1284 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1285 | if (!ret || !ret->sc_type) | |
1286 | return NULL; | |
1287 | return ret; | |
4d71ab87 BF |
1288 | } |
1289 | ||
38c2f4b1 | 1290 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1291 | { |
1292 | struct nfs4_stid *s; | |
4d71ab87 | 1293 | |
38c2f4b1 | 1294 | s = find_stateid(cl, t); |
4d71ab87 BF |
1295 | if (!s) |
1296 | return NULL; | |
f459e453 | 1297 | if (typemask & s->sc_type) |
4581d140 | 1298 | return s; |
4581d140 BF |
1299 | return NULL; |
1300 | } | |
1301 | ||
2216d449 | 1302 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1303 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1304 | { | |
1305 | struct nfs4_client *clp; | |
1306 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1307 | int ret; |
c212cecf | 1308 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1309 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1310 | |
1311 | clp = alloc_client(name); | |
1312 | if (clp == NULL) | |
1313 | return NULL; | |
1314 | ||
792c95dd | 1315 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1316 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1317 | if (ret) { | |
c9a49628 | 1318 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1319 | free_client(clp); |
c9a49628 | 1320 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1321 | return NULL; |
b09333c4 | 1322 | } |
38c2f4b1 | 1323 | idr_init(&clp->cl_stateids); |
46583e25 | 1324 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1325 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1326 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1327 | INIT_LIST_HEAD(&clp->cl_openowners); |
1328 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1329 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1330 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1331 | spin_lock_init(&clp->cl_lock); |
57725155 | 1332 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1333 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1334 | clear_bit(0, &clp->cl_cb_slot_busy); |
1335 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1336 | copy_verf(clp, verf); | |
1337 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1338 | gen_confirm(clp); |
edd76786 | 1339 | clp->cl_cb_session = NULL; |
c212cecf | 1340 | clp->net = net; |
b09333c4 RL |
1341 | return clp; |
1342 | } | |
1343 | ||
fd39ca9a | 1344 | static void |
ac55fdc4 JL |
1345 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1346 | { | |
1347 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1348 | struct nfs4_client *clp; | |
1349 | ||
1350 | while (*new) { | |
1351 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1352 | parent = *new; | |
1353 | ||
1354 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1355 | new = &((*new)->rb_left); | |
1356 | else | |
1357 | new = &((*new)->rb_right); | |
1358 | } | |
1359 | ||
1360 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1361 | rb_insert_color(&new_clp->cl_namenode, root); | |
1362 | } | |
1363 | ||
1364 | static struct nfs4_client * | |
1365 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1366 | { | |
1367 | long long cmp; | |
1368 | struct rb_node *node = root->rb_node; | |
1369 | struct nfs4_client *clp; | |
1370 | ||
1371 | while (node) { | |
1372 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1373 | cmp = compare_blob(&clp->cl_name, name); | |
1374 | if (cmp > 0) | |
1375 | node = node->rb_left; | |
1376 | else if (cmp < 0) | |
1377 | node = node->rb_right; | |
1378 | else | |
1379 | return clp; | |
1380 | } | |
1381 | return NULL; | |
1382 | } | |
1383 | ||
1384 | static void | |
1385 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1386 | { |
1387 | unsigned int idhashval; | |
0a7ec377 | 1388 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1389 | |
ac55fdc4 | 1390 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1391 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1392 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1393 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1394 | renew_client(clp); |
1da177e4 LT |
1395 | } |
1396 | ||
fd39ca9a | 1397 | static void |
1da177e4 LT |
1398 | move_to_confirmed(struct nfs4_client *clp) |
1399 | { | |
1400 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1401 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1402 | |
1403 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1404 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1405 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1406 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1407 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1408 | renew_client(clp); |
1409 | } | |
1410 | ||
1411 | static struct nfs4_client * | |
8daae4dc | 1412 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 LT |
1413 | { |
1414 | struct nfs4_client *clp; | |
1415 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1416 | ||
8daae4dc | 1417 | list_for_each_entry(clp, &nn->conf_id_hashtbl[idhashval], cl_idhash) { |
a50d2ad1 | 1418 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1419 | if ((bool)clp->cl_minorversion != sessions) |
1420 | return NULL; | |
a50d2ad1 | 1421 | renew_client(clp); |
1da177e4 | 1422 | return clp; |
a50d2ad1 | 1423 | } |
1da177e4 LT |
1424 | } |
1425 | return NULL; | |
1426 | } | |
1427 | ||
1428 | static struct nfs4_client * | |
0a7ec377 | 1429 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 LT |
1430 | { |
1431 | struct nfs4_client *clp; | |
1432 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1433 | ||
0a7ec377 | 1434 | list_for_each_entry(clp, &nn->unconf_id_hashtbl[idhashval], cl_idhash) { |
d15c077e BF |
1435 | if (same_clid(&clp->cl_clientid, clid)) { |
1436 | if ((bool)clp->cl_minorversion != sessions) | |
1437 | return NULL; | |
1da177e4 | 1438 | return clp; |
d15c077e | 1439 | } |
1da177e4 LT |
1440 | } |
1441 | return NULL; | |
1442 | } | |
1443 | ||
6e5f15c9 | 1444 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1445 | { |
6e5f15c9 | 1446 | return clp->cl_exchange_flags != 0; |
e203d506 | 1447 | } |
a1bcecd2 | 1448 | |
28ce6054 | 1449 | static struct nfs4_client * |
382a62e7 | 1450 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1451 | { |
382a62e7 | 1452 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1453 | } |
1454 | ||
1455 | static struct nfs4_client * | |
a99454aa | 1456 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1457 | { |
a99454aa | 1458 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1459 | } |
1460 | ||
fd39ca9a | 1461 | static void |
6f3d772f | 1462 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1463 | { |
07263f1e | 1464 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1465 | struct sockaddr *sa = svc_addr(rqstp); |
1466 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1467 | unsigned short expected_family; |
1468 | ||
1469 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1470 | if (se->se_callback_netid_len == 3 && | |
1471 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1472 | expected_family = AF_INET; | |
1473 | else if (se->se_callback_netid_len == 4 && | |
1474 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1475 | expected_family = AF_INET6; | |
1476 | else | |
1da177e4 LT |
1477 | goto out_err; |
1478 | ||
c212cecf | 1479 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1480 | se->se_callback_addr_len, |
07263f1e BF |
1481 | (struct sockaddr *)&conn->cb_addr, |
1482 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1483 | |
07263f1e | 1484 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1485 | goto out_err; |
aa9a4ec7 | 1486 | |
07263f1e BF |
1487 | if (conn->cb_addr.ss_family == AF_INET6) |
1488 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1489 | |
07263f1e BF |
1490 | conn->cb_prog = se->se_callback_prog; |
1491 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1492 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1493 | return; |
1494 | out_err: | |
07263f1e BF |
1495 | conn->cb_addr.ss_family = AF_UNSPEC; |
1496 | conn->cb_addrlen = 0; | |
849823c5 | 1497 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1498 | "will not receive delegations\n", |
1499 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1500 | ||
1da177e4 LT |
1501 | return; |
1502 | } | |
1503 | ||
074fe897 | 1504 | /* |
557ce264 | 1505 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1506 | */ |
074fe897 AA |
1507 | void |
1508 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1509 | { |
557ce264 AA |
1510 | struct nfsd4_slot *slot = resp->cstate.slot; |
1511 | unsigned int base; | |
074fe897 | 1512 | |
557ce264 | 1513 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1514 | |
557ce264 AA |
1515 | slot->sl_opcnt = resp->opcnt; |
1516 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1517 | |
bf5c43c8 | 1518 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1519 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1520 | slot->sl_datalen = 0; |
bf864a31 | 1521 | return; |
074fe897 | 1522 | } |
557ce264 AA |
1523 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1524 | base = (char *)resp->cstate.datap - | |
1525 | (char *)resp->xbuf->head[0].iov_base; | |
1526 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1527 | slot->sl_datalen)) | |
1528 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1529 | return; | |
074fe897 AA |
1530 | } |
1531 | ||
1532 | /* | |
abfabf8c AA |
1533 | * Encode the replay sequence operation from the slot values. |
1534 | * If cachethis is FALSE encode the uncached rep error on the next | |
1535 | * operation which sets resp->p and increments resp->opcnt for | |
1536 | * nfs4svc_encode_compoundres. | |
074fe897 | 1537 | * |
074fe897 | 1538 | */ |
abfabf8c AA |
1539 | static __be32 |
1540 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1541 | struct nfsd4_compoundres *resp) | |
074fe897 | 1542 | { |
abfabf8c AA |
1543 | struct nfsd4_op *op; |
1544 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1545 | |
abfabf8c AA |
1546 | /* Encode the replayed sequence operation */ |
1547 | op = &args->ops[resp->opcnt - 1]; | |
1548 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1549 | |
abfabf8c | 1550 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1551 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1552 | op = &args->ops[resp->opcnt++]; |
1553 | op->status = nfserr_retry_uncached_rep; | |
1554 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1555 | } |
abfabf8c | 1556 | return op->status; |
074fe897 AA |
1557 | } |
1558 | ||
1559 | /* | |
557ce264 AA |
1560 | * The sequence operation is not cached because we can use the slot and |
1561 | * session values. | |
074fe897 AA |
1562 | */ |
1563 | __be32 | |
bf864a31 AA |
1564 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1565 | struct nfsd4_sequence *seq) | |
074fe897 | 1566 | { |
557ce264 | 1567 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1568 | __be32 status; |
1569 | ||
557ce264 | 1570 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1571 | |
abfabf8c AA |
1572 | /* Either returns 0 or nfserr_retry_uncached */ |
1573 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1574 | if (status == nfserr_retry_uncached_rep) | |
1575 | return status; | |
074fe897 | 1576 | |
557ce264 AA |
1577 | /* The sequence operation has been encoded, cstate->datap set. */ |
1578 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1579 | |
557ce264 AA |
1580 | resp->opcnt = slot->sl_opcnt; |
1581 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1582 | status = slot->sl_status; | |
074fe897 AA |
1583 | |
1584 | return status; | |
1585 | } | |
1586 | ||
0733d213 AA |
1587 | /* |
1588 | * Set the exchange_id flags returned by the server. | |
1589 | */ | |
1590 | static void | |
1591 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1592 | { | |
1593 | /* pNFS is not supported */ | |
1594 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1595 | ||
1596 | /* Referrals are supported, Migration is not. */ | |
1597 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1598 | ||
1599 | /* set the wire flags to return to client. */ | |
1600 | clid->flags = new->cl_exchange_flags; | |
1601 | } | |
1602 | ||
631fc9ea BF |
1603 | static bool client_has_state(struct nfs4_client *clp) |
1604 | { | |
1605 | /* | |
1606 | * Note clp->cl_openowners check isn't quite right: there's no | |
1607 | * need to count owners without stateid's. | |
1608 | * | |
1609 | * Also note we should probably be using this in 4.0 case too. | |
1610 | */ | |
6eccece9 BF |
1611 | return !list_empty(&clp->cl_openowners) |
1612 | || !list_empty(&clp->cl_delegations) | |
1613 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1614 | } |
1615 | ||
069b6ad4 AA |
1616 | __be32 |
1617 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1618 | struct nfsd4_compound_state *cstate, | |
1619 | struct nfsd4_exchange_id *exid) | |
1620 | { | |
0733d213 | 1621 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1622 | __be32 status; |
363168b4 | 1623 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1624 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1625 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1626 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1627 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1628 | |
363168b4 | 1629 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1630 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1631 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1632 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1633 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1634 | |
a084daf5 | 1635 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1636 | return nfserr_inval; |
1637 | ||
1638 | /* Currently only support SP4_NONE */ | |
1639 | switch (exid->spa_how) { | |
1640 | case SP4_NONE: | |
1641 | break; | |
063b0fb9 BF |
1642 | default: /* checked by xdr code */ |
1643 | WARN_ON_ONCE(1); | |
0733d213 | 1644 | case SP4_SSV: |
0733d213 AA |
1645 | case SP4_MACH_CRED: |
1646 | return nfserr_serverfault; /* no excuse :-/ */ | |
1647 | } | |
1648 | ||
2dbb269d | 1649 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1650 | nfs4_lock_state(); |
382a62e7 | 1651 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1652 | if (conf) { |
83e08fd4 BF |
1653 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1654 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1655 | ||
136e658d BF |
1656 | if (update) { |
1657 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1658 | status = nfserr_inval; |
1a308118 BF |
1659 | goto out; |
1660 | } | |
136e658d | 1661 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1662 | status = nfserr_perm; |
136e658d BF |
1663 | goto out; |
1664 | } | |
1665 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1666 | status = nfserr_not_same; |
1667 | goto out; | |
1668 | } | |
136e658d BF |
1669 | /* case 6 */ |
1670 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1671 | new = conf; | |
1672 | goto out_copy; | |
0733d213 | 1673 | } |
136e658d | 1674 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1675 | if (client_has_state(conf)) { |
1676 | status = nfserr_clid_inuse; | |
0733d213 AA |
1677 | goto out; |
1678 | } | |
1679 | expire_client(conf); | |
1680 | goto out_new; | |
1681 | } | |
136e658d | 1682 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1683 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1684 | new = conf; |
1685 | goto out_copy; | |
1686 | } | |
1687 | /* case 5, client reboot */ | |
136e658d | 1688 | goto out_new; |
6ddbbbfe MS |
1689 | } |
1690 | ||
2dbb269d | 1691 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1692 | status = nfserr_noent; |
1693 | goto out; | |
0733d213 AA |
1694 | } |
1695 | ||
a99454aa | 1696 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1697 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1698 | expire_client(unconf); |
0733d213 | 1699 | |
2dbb269d | 1700 | /* case 1 (normal case) */ |
0733d213 | 1701 | out_new: |
2216d449 | 1702 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1703 | if (new == NULL) { |
4731030d | 1704 | status = nfserr_jukebox; |
0733d213 AA |
1705 | goto out; |
1706 | } | |
c116a0af | 1707 | new->cl_minorversion = 1; |
0733d213 | 1708 | |
c212cecf | 1709 | gen_clid(new, nn); |
ac55fdc4 | 1710 | add_to_unconfirmed(new); |
0733d213 AA |
1711 | out_copy: |
1712 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1713 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1714 | ||
778df3f0 | 1715 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1716 | nfsd4_set_ex_flags(new, exid); |
1717 | ||
1718 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1719 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1720 | status = nfs_ok; |
1721 | ||
1722 | out: | |
1723 | nfs4_unlock_state(); | |
0733d213 | 1724 | return status; |
069b6ad4 AA |
1725 | } |
1726 | ||
57b7b43b | 1727 | static __be32 |
88e588d5 | 1728 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1729 | { |
88e588d5 AA |
1730 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1731 | slot_seqid); | |
b85d4c01 BH |
1732 | |
1733 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1734 | if (slot_inuse) { |
1735 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1736 | return nfserr_jukebox; |
1737 | else | |
1738 | return nfserr_seq_misordered; | |
1739 | } | |
f6d82485 | 1740 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1741 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1742 | return nfs_ok; |
88e588d5 | 1743 | if (seqid == slot_seqid) |
b85d4c01 | 1744 | return nfserr_replay_cache; |
b85d4c01 BH |
1745 | return nfserr_seq_misordered; |
1746 | } | |
1747 | ||
49557cc7 AA |
1748 | /* |
1749 | * Cache the create session result into the create session single DRC | |
1750 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1751 | * Do this for solo or embedded create session operations. | |
1752 | */ | |
1753 | static void | |
1754 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1755 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1756 | { |
1757 | slot->sl_status = nfserr; | |
1758 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1759 | } | |
1760 | ||
1761 | static __be32 | |
1762 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1763 | struct nfsd4_clid_slot *slot) | |
1764 | { | |
1765 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1766 | return slot->sl_status; | |
1767 | } | |
1768 | ||
1b74c25b MJ |
1769 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1770 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1771 | 1 + /* MIN tag is length with zero, only length */ \ | |
1772 | 3 + /* version, opcount, opcode */ \ | |
1773 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1774 | /* seqid, slotID, slotID, cache */ \ | |
1775 | 4 ) * sizeof(__be32)) | |
1776 | ||
1777 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1778 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1779 | 1 + /* status */ \ | |
1780 | 1 + /* MIN tag is length with zero, only length */ \ | |
1781 | 3 + /* opcount, opcode, opstatus*/ \ | |
1782 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1783 | /* seqid, slotID, slotID, slotID, status */ \ | |
1784 | 5 ) * sizeof(__be32)) | |
1785 | ||
57b7b43b | 1786 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1787 | { |
1788 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1789 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1790 | } | |
1791 | ||
069b6ad4 AA |
1792 | __be32 |
1793 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1794 | struct nfsd4_compound_state *cstate, | |
1795 | struct nfsd4_create_session *cr_ses) | |
1796 | { | |
363168b4 | 1797 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1798 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1799 | struct nfsd4_session *new; |
81f0b2a4 | 1800 | struct nfsd4_conn *conn; |
49557cc7 | 1801 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1802 | __be32 status = 0; |
8daae4dc | 1803 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 1804 | |
a62573dc MJ |
1805 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1806 | return nfserr_inval; | |
49730501 BF |
1807 | if (check_forechannel_attrs(cr_ses->fore_channel)) |
1808 | return nfserr_toosmall; | |
9dd9845f | 1809 | new = alloc_session(&cr_ses->fore_channel, nn); |
81f0b2a4 BF |
1810 | if (!new) |
1811 | return nfserr_jukebox; | |
1812 | status = nfserr_jukebox; | |
1813 | conn = alloc_conn_from_crses(rqstp, cr_ses); | |
1814 | if (!conn) | |
1815 | goto out_free_session; | |
a62573dc | 1816 | |
ec6b5d7b | 1817 | nfs4_lock_state(); |
0a7ec377 | 1818 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 1819 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
ec6b5d7b AA |
1820 | |
1821 | if (conf) { | |
49557cc7 AA |
1822 | cs_slot = &conf->cl_cs_slot; |
1823 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1824 | if (status == nfserr_replay_cache) { |
49557cc7 | 1825 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1826 | goto out_free_conn; |
49557cc7 | 1827 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1828 | status = nfserr_seq_misordered; |
81f0b2a4 | 1829 | goto out_free_conn; |
ec6b5d7b | 1830 | } |
ec6b5d7b | 1831 | } else if (unconf) { |
8f9d3d3b | 1832 | struct nfs4_client *old; |
ec6b5d7b | 1833 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1834 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1835 | status = nfserr_clid_inuse; |
81f0b2a4 | 1836 | goto out_free_conn; |
ec6b5d7b | 1837 | } |
49557cc7 AA |
1838 | cs_slot = &unconf->cl_cs_slot; |
1839 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1840 | if (status) { |
1841 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1842 | status = nfserr_seq_misordered; |
81f0b2a4 | 1843 | goto out_free_conn; |
ec6b5d7b | 1844 | } |
382a62e7 | 1845 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
8f9d3d3b BF |
1846 | if (old) |
1847 | expire_client(old); | |
1848 | move_to_confirmed(unconf); | |
ec6b5d7b AA |
1849 | conf = unconf; |
1850 | } else { | |
1851 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1852 | goto out_free_conn; |
ec6b5d7b | 1853 | } |
81f0b2a4 | 1854 | status = nfs_ok; |
408b79bc BF |
1855 | /* |
1856 | * We do not support RDMA or persistent sessions | |
1857 | */ | |
1858 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1859 | cr_ses->flags &= ~SESSION4_RDMA; | |
1860 | ||
81f0b2a4 BF |
1861 | init_session(rqstp, new, conf, cr_ses); |
1862 | nfsd4_init_conn(rqstp, conn, new); | |
1863 | ||
ac7c46f2 | 1864 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1865 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1866 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1867 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1868 | cs_slot->sl_seqid++; |
49557cc7 | 1869 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1870 | |
49557cc7 AA |
1871 | /* cache solo and embedded create sessions under the state lock */ |
1872 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 1873 | nfs4_unlock_state(); |
266533c6 | 1874 | out: |
ec6b5d7b AA |
1875 | dprintk("%s returns %d\n", __func__, ntohl(status)); |
1876 | return status; | |
81f0b2a4 | 1877 | out_free_conn: |
266533c6 | 1878 | nfs4_unlock_state(); |
81f0b2a4 BF |
1879 | free_conn(conn); |
1880 | out_free_session: | |
1881 | __free_session(new); | |
1882 | goto out; | |
069b6ad4 AA |
1883 | } |
1884 | ||
1d1bc8f2 BF |
1885 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1886 | { | |
1887 | switch (*dir) { | |
1888 | case NFS4_CDFC4_FORE: | |
1889 | case NFS4_CDFC4_BACK: | |
1890 | return nfs_ok; | |
1891 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1892 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1893 | *dir = NFS4_CDFC4_BOTH; | |
1894 | return nfs_ok; | |
1895 | }; | |
1896 | return nfserr_inval; | |
1897 | } | |
1898 | ||
cb73a9f4 BF |
1899 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
1900 | { | |
1901 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 1902 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
cb73a9f4 | 1903 | |
c9a49628 | 1904 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
1905 | session->se_cb_prog = bc->bc_cb_program; |
1906 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 1907 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
1908 | |
1909 | nfsd4_probe_callback(session->se_client); | |
1910 | ||
1911 | return nfs_ok; | |
1912 | } | |
1913 | ||
1d1bc8f2 BF |
1914 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
1915 | struct nfsd4_compound_state *cstate, | |
1916 | struct nfsd4_bind_conn_to_session *bcts) | |
1917 | { | |
1918 | __be32 status; | |
3ba63671 | 1919 | struct nfsd4_conn *conn; |
c9a49628 | 1920 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1d1bc8f2 BF |
1921 | |
1922 | if (!nfsd4_last_compound_op(rqstp)) | |
1923 | return nfserr_not_only_op; | |
c9a49628 | 1924 | spin_lock(&nn->client_lock); |
1872de0e | 1925 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
1d1bc8f2 BF |
1926 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires |
1927 | * client_lock iself: */ | |
1928 | if (cstate->session) { | |
1929 | nfsd4_get_session(cstate->session); | |
1930 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1931 | } | |
c9a49628 | 1932 | spin_unlock(&nn->client_lock); |
1d1bc8f2 BF |
1933 | if (!cstate->session) |
1934 | return nfserr_badsession; | |
1935 | ||
1936 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
3ba63671 BF |
1937 | if (status) |
1938 | return status; | |
1939 | conn = alloc_conn(rqstp, bcts->dir); | |
1940 | if (!conn) | |
1941 | return nfserr_jukebox; | |
e1ff371f | 1942 | nfsd4_init_conn(rqstp, conn, cstate->session); |
3ba63671 | 1943 | return nfs_ok; |
1d1bc8f2 BF |
1944 | } |
1945 | ||
5d4cec2f BF |
1946 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1947 | { | |
1948 | if (!session) | |
1949 | return 0; | |
1950 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1951 | } | |
1952 | ||
069b6ad4 AA |
1953 | __be32 |
1954 | nfsd4_destroy_session(struct svc_rqst *r, | |
1955 | struct nfsd4_compound_state *cstate, | |
1956 | struct nfsd4_destroy_session *sessionid) | |
1957 | { | |
e10e0cfc | 1958 | struct nfsd4_session *ses; |
57b7b43b | 1959 | __be32 status = nfserr_badsession; |
c9a49628 | 1960 | struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); |
e10e0cfc BH |
1961 | |
1962 | /* Notes: | |
1963 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1964 | * - Should we return nfserr_back_chan_busy if waiting for | |
1965 | * callbacks on to-be-destroyed session? | |
1966 | * - Do we need to clear any callback info from previous session? | |
1967 | */ | |
1968 | ||
5d4cec2f | 1969 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1970 | if (!nfsd4_last_compound_op(r)) |
1971 | return nfserr_not_only_op; | |
1972 | } | |
e10e0cfc | 1973 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 1974 | spin_lock(&nn->client_lock); |
1872de0e | 1975 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
e10e0cfc | 1976 | if (!ses) { |
c9a49628 | 1977 | spin_unlock(&nn->client_lock); |
e10e0cfc BH |
1978 | goto out; |
1979 | } | |
1980 | ||
1981 | unhash_session(ses); | |
c9a49628 | 1982 | spin_unlock(&nn->client_lock); |
e10e0cfc | 1983 | |
ab707e15 | 1984 | nfs4_lock_state(); |
84f5f7cc | 1985 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1986 | nfs4_unlock_state(); |
19cf5c02 | 1987 | |
c9a49628 | 1988 | spin_lock(&nn->client_lock); |
19cf5c02 | 1989 | nfsd4_del_conns(ses); |
508dc6e1 | 1990 | nfsd4_put_session_locked(ses); |
c9a49628 | 1991 | spin_unlock(&nn->client_lock); |
e10e0cfc BH |
1992 | status = nfs_ok; |
1993 | out: | |
1994 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1995 | return status; | |
069b6ad4 AA |
1996 | } |
1997 | ||
a663bdd8 | 1998 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1999 | { |
2000 | struct nfsd4_conn *c; | |
2001 | ||
2002 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2003 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2004 | return c; |
2005 | } | |
2006 | } | |
2007 | return NULL; | |
2008 | } | |
2009 | ||
a663bdd8 | 2010 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2011 | { |
2012 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2013 | struct nfsd4_conn *c; |
21b75b01 | 2014 | int ret; |
328ead28 BF |
2015 | |
2016 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2017 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
2018 | if (c) { |
2019 | spin_unlock(&clp->cl_lock); | |
2020 | free_conn(new); | |
2021 | return; | |
2022 | } | |
2023 | __nfsd4_hash_conn(new, ses); | |
2024 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2025 | ret = nfsd4_register_conn(new); |
2026 | if (ret) | |
2027 | /* oops; xprt is already down: */ | |
2028 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
2029 | return; |
2030 | } | |
2031 | ||
868b89c3 MJ |
2032 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2033 | { | |
2034 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2035 | ||
2036 | return args->opcnt > session->se_fchannel.maxops; | |
2037 | } | |
2038 | ||
ae82a8d0 MJ |
2039 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2040 | struct nfsd4_session *session) | |
2041 | { | |
2042 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2043 | ||
2044 | return xb->len > session->se_fchannel.maxreq_sz; | |
2045 | } | |
2046 | ||
069b6ad4 | 2047 | __be32 |
b85d4c01 | 2048 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2049 | struct nfsd4_compound_state *cstate, |
2050 | struct nfsd4_sequence *seq) | |
2051 | { | |
f9bb94c4 | 2052 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
2053 | struct nfsd4_session *session; |
2054 | struct nfsd4_slot *slot; | |
a663bdd8 | 2055 | struct nfsd4_conn *conn; |
57b7b43b | 2056 | __be32 status; |
c9a49628 | 2057 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b85d4c01 | 2058 | |
f9bb94c4 AA |
2059 | if (resp->opcnt != 1) |
2060 | return nfserr_sequence_pos; | |
2061 | ||
a663bdd8 BF |
2062 | /* |
2063 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2064 | * below. | |
2065 | */ | |
2066 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2067 | if (!conn) | |
2068 | return nfserr_jukebox; | |
2069 | ||
c9a49628 | 2070 | spin_lock(&nn->client_lock); |
b85d4c01 | 2071 | status = nfserr_badsession; |
1872de0e | 2072 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
b85d4c01 BH |
2073 | if (!session) |
2074 | goto out; | |
2075 | ||
868b89c3 MJ |
2076 | status = nfserr_too_many_ops; |
2077 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
2078 | goto out; | |
2079 | ||
ae82a8d0 MJ |
2080 | status = nfserr_req_too_big; |
2081 | if (nfsd4_request_too_big(rqstp, session)) | |
2082 | goto out; | |
2083 | ||
b85d4c01 | 2084 | status = nfserr_badslot; |
6c18ba9f | 2085 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
2086 | goto out; |
2087 | ||
557ce264 | 2088 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2089 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2090 | ||
a8dfdaeb AA |
2091 | /* We do not negotiate the number of slots yet, so set the |
2092 | * maxslots to the session maxreqs which is used to encode | |
2093 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2094 | seq->maxslots = session->se_fchannel.maxreqs; | |
2095 | ||
73e79482 BF |
2096 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2097 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2098 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2099 | status = nfserr_seq_misordered; |
2100 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
2101 | goto out; | |
b85d4c01 BH |
2102 | cstate->slot = slot; |
2103 | cstate->session = session; | |
da3846a2 | 2104 | /* Return the cached reply status and set cstate->status |
557ce264 | 2105 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2106 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2107 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2108 | goto out; |
b85d4c01 BH |
2109 | } |
2110 | if (status) | |
2111 | goto out; | |
2112 | ||
a663bdd8 BF |
2113 | nfsd4_sequence_check_conn(conn, session); |
2114 | conn = NULL; | |
328ead28 | 2115 | |
b85d4c01 | 2116 | /* Success! bump slot seqid */ |
b85d4c01 | 2117 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2118 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2119 | if (seq->cachethis) |
2120 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2121 | else |
2122 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2123 | |
2124 | cstate->slot = slot; | |
2125 | cstate->session = session; | |
2126 | ||
b85d4c01 | 2127 | out: |
26c0c75e | 2128 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2129 | if (cstate->session) { |
0d7bb719 BF |
2130 | struct nfs4_client *clp = session->se_client; |
2131 | ||
36acb66b | 2132 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2133 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2134 | switch (clp->cl_cb_state) { |
2135 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2136 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2137 | break; |
2138 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2139 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2140 | break; |
fc0c3dd1 BH |
2141 | default: |
2142 | seq->status_flags = 0; | |
5423732a | 2143 | } |
aaf84eb9 | 2144 | } |
a663bdd8 | 2145 | kfree(conn); |
c9a49628 | 2146 | spin_unlock(&nn->client_lock); |
b85d4c01 BH |
2147 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2148 | return status; | |
069b6ad4 AA |
2149 | } |
2150 | ||
345c2842 MJ |
2151 | __be32 |
2152 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2153 | { | |
2154 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2155 | __be32 status = 0; |
8daae4dc | 2156 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2157 | |
2158 | nfs4_lock_state(); | |
0a7ec377 | 2159 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2160 | conf = find_confirmed_client(&dc->clientid, true, nn); |
345c2842 MJ |
2161 | |
2162 | if (conf) { | |
2163 | clp = conf; | |
2164 | ||
6eccece9 | 2165 | if (!is_client_expired(conf) && client_has_state(conf)) { |
345c2842 MJ |
2166 | status = nfserr_clientid_busy; |
2167 | goto out; | |
2168 | } | |
2169 | ||
2170 | /* rfc5661 18.50.3 */ | |
2171 | if (cstate->session && conf == cstate->session->se_client) { | |
2172 | status = nfserr_clientid_busy; | |
2173 | goto out; | |
2174 | } | |
2175 | } else if (unconf) | |
2176 | clp = unconf; | |
2177 | else { | |
2178 | status = nfserr_stale_clientid; | |
2179 | goto out; | |
2180 | } | |
2181 | ||
2182 | expire_client(clp); | |
2183 | out: | |
2184 | nfs4_unlock_state(); | |
2185 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2186 | return status; | |
2187 | } | |
2188 | ||
4dc6ec00 BF |
2189 | __be32 |
2190 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2191 | { | |
57b7b43b | 2192 | __be32 status = 0; |
bcecf1cc | 2193 | |
4dc6ec00 BF |
2194 | if (rc->rca_one_fs) { |
2195 | if (!cstate->current_fh.fh_dentry) | |
2196 | return nfserr_nofilehandle; | |
2197 | /* | |
2198 | * We don't take advantage of the rca_one_fs case. | |
2199 | * That's OK, it's optional, we can safely ignore it. | |
2200 | */ | |
2201 | return nfs_ok; | |
2202 | } | |
bcecf1cc | 2203 | |
4dc6ec00 | 2204 | nfs4_lock_state(); |
bcecf1cc | 2205 | status = nfserr_complete_already; |
a52d726b JL |
2206 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2207 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2208 | goto out; |
2209 | ||
2210 | status = nfserr_stale_clientid; | |
2211 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2212 | /* |
2213 | * The following error isn't really legal. | |
2214 | * But we only get here if the client just explicitly | |
2215 | * destroyed the client. Surely it no longer cares what | |
2216 | * error it gets back on an operation for the dead | |
2217 | * client. | |
2218 | */ | |
bcecf1cc MJ |
2219 | goto out; |
2220 | ||
2221 | status = nfs_ok; | |
2a4317c5 | 2222 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2223 | out: |
4dc6ec00 | 2224 | nfs4_unlock_state(); |
bcecf1cc | 2225 | return status; |
4dc6ec00 BF |
2226 | } |
2227 | ||
b37ad28b | 2228 | __be32 |
b591480b BF |
2229 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2230 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2231 | { |
a084daf5 | 2232 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2233 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2234 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2235 | __be32 status; |
c212cecf SK |
2236 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2237 | ||
63db4632 | 2238 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2239 | nfs4_lock_state(); |
382a62e7 | 2240 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2241 | if (conf) { |
63db4632 | 2242 | /* case 0: */ |
1da177e4 | 2243 | status = nfserr_clid_inuse; |
e203d506 BF |
2244 | if (clp_used_exchangeid(conf)) |
2245 | goto out; | |
026722c2 | 2246 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2247 | char addr_str[INET6_ADDRSTRLEN]; |
2248 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2249 | sizeof(addr_str)); | |
2250 | dprintk("NFSD: setclientid: string in use by client " | |
2251 | "at %s\n", addr_str); | |
1da177e4 LT |
2252 | goto out; |
2253 | } | |
1da177e4 | 2254 | } |
a99454aa | 2255 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2256 | if (unconf) |
2257 | expire_client(unconf); | |
3e772463 | 2258 | status = nfserr_jukebox; |
2216d449 | 2259 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2260 | if (new == NULL) |
2261 | goto out; | |
34b232bb | 2262 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2263 | /* case 1: probable callback update */ |
1da177e4 | 2264 | copy_clid(new, conf); |
34b232bb | 2265 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2266 | gen_clid(new, nn); |
8323c3b2 | 2267 | new->cl_minorversion = 0; |
6f3d772f | 2268 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2269 | add_to_unconfirmed(new); |
1da177e4 LT |
2270 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2271 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2272 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2273 | status = nfs_ok; | |
2274 | out: | |
2275 | nfs4_unlock_state(); | |
2276 | return status; | |
2277 | } | |
2278 | ||
2279 | ||
b37ad28b | 2280 | __be32 |
b591480b BF |
2281 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2282 | struct nfsd4_compound_state *cstate, | |
2283 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2284 | { |
21ab45a4 | 2285 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2286 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2287 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2288 | __be32 status; |
7f2210fa | 2289 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2290 | |
2c142baa | 2291 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2292 | return nfserr_stale_clientid; |
1da177e4 | 2293 | nfs4_lock_state(); |
21ab45a4 | 2294 | |
8daae4dc | 2295 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2296 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2297 | /* |
8695b90a BF |
2298 | * We try hard to give out unique clientid's, so if we get an |
2299 | * attempt to confirm the same clientid with a different cred, | |
2300 | * there's a bug somewhere. Let's charitably assume it's our | |
2301 | * bug. | |
a186e767 | 2302 | */ |
8695b90a BF |
2303 | status = nfserr_serverfault; |
2304 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2305 | goto out; | |
2306 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2307 | goto out; | |
63db4632 | 2308 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2309 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2310 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2311 | status = nfs_ok; |
90d700b7 BF |
2312 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2313 | status = nfserr_stale_clientid; | |
2314 | goto out; | |
2315 | } | |
2316 | status = nfs_ok; | |
2317 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2318 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2319 | nfsd4_probe_callback(conf); | |
2320 | expire_client(unconf); | |
90d700b7 | 2321 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2322 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
0d22f68f | 2323 | if (conf) |
8695b90a | 2324 | expire_client(conf); |
8695b90a | 2325 | move_to_confirmed(unconf); |
f3d03b92 | 2326 | nfsd4_probe_callback(unconf); |
08e8987c | 2327 | } |
1da177e4 | 2328 | out: |
1da177e4 LT |
2329 | nfs4_unlock_state(); |
2330 | return status; | |
2331 | } | |
2332 | ||
32513b40 BF |
2333 | static struct nfs4_file *nfsd4_alloc_file(void) |
2334 | { | |
2335 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2336 | } | |
2337 | ||
1da177e4 | 2338 | /* OPEN Share state helper functions */ |
32513b40 | 2339 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2340 | { |
1da177e4 LT |
2341 | unsigned int hashval = file_hashval(ino); |
2342 | ||
32513b40 BF |
2343 | atomic_set(&fp->fi_ref, 1); |
2344 | INIT_LIST_HEAD(&fp->fi_hash); | |
2345 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2346 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2347 | fp->fi_inode = igrab(ino); | |
2348 | fp->fi_had_conflict = false; | |
2349 | fp->fi_lease = NULL; | |
2350 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2351 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2352 | spin_lock(&recall_lock); | |
2353 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2354 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2355 | } |
2356 | ||
e60d4398 | 2357 | static void |
e18b890b | 2358 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2359 | { |
e60d4398 N |
2360 | if (*slab == NULL) |
2361 | return; | |
1a1d92c1 | 2362 | kmem_cache_destroy(*slab); |
e60d4398 | 2363 | *slab = NULL; |
1da177e4 LT |
2364 | } |
2365 | ||
e8ff2a84 | 2366 | void |
1da177e4 LT |
2367 | nfsd4_free_slabs(void) |
2368 | { | |
fe0750e5 BF |
2369 | nfsd4_free_slab(&openowner_slab); |
2370 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2371 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2372 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2373 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2374 | } |
1da177e4 | 2375 | |
72083396 | 2376 | int |
e60d4398 N |
2377 | nfsd4_init_slabs(void) |
2378 | { | |
fe0750e5 BF |
2379 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2380 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2381 | if (openowner_slab == NULL) | |
2382 | goto out_nomem; | |
2383 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2384 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2385 | if (lockowner_slab == NULL) |
e60d4398 N |
2386 | goto out_nomem; |
2387 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2388 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2389 | if (file_slab == NULL) |
2390 | goto out_nomem; | |
5ac049ac | 2391 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2392 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2393 | if (stateid_slab == NULL) |
2394 | goto out_nomem; | |
5b2d21c1 | 2395 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2396 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2397 | if (deleg_slab == NULL) |
2398 | goto out_nomem; | |
e60d4398 N |
2399 | return 0; |
2400 | out_nomem: | |
2401 | nfsd4_free_slabs(); | |
2402 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2403 | return -ENOMEM; | |
1da177e4 LT |
2404 | } |
2405 | ||
fe0750e5 BF |
2406 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2407 | { | |
2408 | kfree(oo->oo_owner.so_owner.data); | |
2409 | kmem_cache_free(openowner_slab, oo); | |
2410 | } | |
2411 | ||
2412 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2413 | { |
fe0750e5 BF |
2414 | kfree(lo->lo_owner.so_owner.data); |
2415 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2416 | } |
2417 | ||
ff194bd9 | 2418 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2419 | { |
ff194bd9 BF |
2420 | rp->rp_status = nfserr_serverfault; |
2421 | rp->rp_buflen = 0; | |
2422 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2423 | } |
2424 | ||
fe0750e5 | 2425 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2426 | { |
1da177e4 | 2427 | struct nfs4_stateowner *sop; |
1da177e4 | 2428 | |
fe0750e5 | 2429 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2430 | if (!sop) |
2431 | return NULL; | |
2432 | ||
2433 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2434 | if (!sop->so_owner.data) { | |
fe0750e5 | 2435 | kmem_cache_free(slab, sop); |
1da177e4 | 2436 | return NULL; |
ff194bd9 BF |
2437 | } |
2438 | sop->so_owner.len = owner->len; | |
2439 | ||
ea1da636 | 2440 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2441 | sop->so_client = clp; |
2442 | init_nfs4_replay(&sop->so_replay); | |
2443 | return sop; | |
2444 | } | |
2445 | ||
fe0750e5 | 2446 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2447 | { |
9b531137 SK |
2448 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2449 | ||
2450 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2451 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2452 | } |
2453 | ||
fe0750e5 | 2454 | static struct nfs4_openowner * |
ff194bd9 | 2455 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2456 | struct nfs4_openowner *oo; |
ff194bd9 | 2457 | |
fe0750e5 BF |
2458 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2459 | if (!oo) | |
ff194bd9 | 2460 | return NULL; |
fe0750e5 BF |
2461 | oo->oo_owner.so_is_open_owner = 1; |
2462 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2463 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2464 | oo->oo_time = 0; |
38c387b5 | 2465 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2466 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2467 | hash_openowner(oo, clp, strhashval); | |
2468 | return oo; | |
1da177e4 LT |
2469 | } |
2470 | ||
996e0938 | 2471 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2472 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2473 | |
3abdb607 | 2474 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
ea1da636 | 2475 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2476 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2477 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2478 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2479 | get_nfs4_file(fp); |
1da177e4 | 2480 | stp->st_file = fp; |
1da177e4 LT |
2481 | stp->st_access_bmap = 0; |
2482 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2483 | set_access(open->op_share_access, stp); |
ce0fc43c | 2484 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2485 | stp->st_openstp = NULL; |
1da177e4 LT |
2486 | } |
2487 | ||
fd39ca9a | 2488 | static void |
73758fed | 2489 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2490 | { |
73758fed SK |
2491 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2492 | ||
fe0750e5 | 2493 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2494 | |
73758fed | 2495 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2496 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2497 | } |
2498 | ||
1da177e4 | 2499 | static int |
599e0a22 BF |
2500 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2501 | clientid_t *clid) | |
2502 | { | |
2503 | return (sop->so_owner.len == owner->len) && | |
2504 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2505 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2506 | } |
2507 | ||
fe0750e5 | 2508 | static struct nfs4_openowner * |
9b531137 SK |
2509 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2510 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2511 | { |
a50d2ad1 BF |
2512 | struct nfs4_stateowner *so; |
2513 | struct nfs4_openowner *oo; | |
d15c077e | 2514 | struct nfs4_client *clp; |
1da177e4 | 2515 | |
9b531137 | 2516 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2517 | if (!so->so_is_open_owner) |
2518 | continue; | |
a50d2ad1 BF |
2519 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2520 | oo = openowner(so); | |
d15c077e BF |
2521 | clp = oo->oo_owner.so_client; |
2522 | if ((bool)clp->cl_minorversion != sessions) | |
2523 | return NULL; | |
a50d2ad1 BF |
2524 | renew_client(oo->oo_owner.so_client); |
2525 | return oo; | |
2526 | } | |
1da177e4 LT |
2527 | } |
2528 | return NULL; | |
2529 | } | |
2530 | ||
2531 | /* search file_hashtbl[] for file */ | |
2532 | static struct nfs4_file * | |
2533 | find_file(struct inode *ino) | |
2534 | { | |
2535 | unsigned int hashval = file_hashval(ino); | |
2536 | struct nfs4_file *fp; | |
2537 | ||
8b671b80 | 2538 | spin_lock(&recall_lock); |
1da177e4 | 2539 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2540 | if (fp->fi_inode == ino) { |
2541 | get_nfs4_file(fp); | |
8b671b80 | 2542 | spin_unlock(&recall_lock); |
1da177e4 | 2543 | return fp; |
13cd2184 | 2544 | } |
1da177e4 | 2545 | } |
8b671b80 | 2546 | spin_unlock(&recall_lock); |
1da177e4 LT |
2547 | return NULL; |
2548 | } | |
2549 | ||
1da177e4 LT |
2550 | /* |
2551 | * Called to check deny when READ with all zero stateid or | |
2552 | * WRITE with all zero or all one stateid | |
2553 | */ | |
b37ad28b | 2554 | static __be32 |
1da177e4 LT |
2555 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2556 | { | |
2557 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2558 | struct nfs4_file *fp; | |
dcef0413 | 2559 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2560 | __be32 ret; |
1da177e4 LT |
2561 | |
2562 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2563 | ||
2564 | fp = find_file(ino); | |
13cd2184 N |
2565 | if (!fp) |
2566 | return nfs_ok; | |
b700949b | 2567 | ret = nfserr_locked; |
1da177e4 | 2568 | /* Search for conflicting share reservations */ |
13cd2184 | 2569 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2570 | if (test_deny(deny_type, stp) || |
2571 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2572 | goto out; |
1da177e4 | 2573 | } |
13cd2184 N |
2574 | ret = nfs_ok; |
2575 | out: | |
2576 | put_nfs4_file(fp); | |
2577 | return ret; | |
1da177e4 LT |
2578 | } |
2579 | ||
6b57d9c8 | 2580 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2581 | { |
1da177e4 LT |
2582 | /* We're assuming the state code never drops its reference |
2583 | * without first removing the lease. Since we're in this lease | |
2584 | * callback (and since the lease code is serialized by the kernel | |
2585 | * lock) we know the server hasn't removed the lease yet, we know | |
2586 | * it's safe to take a reference: */ | |
2587 | atomic_inc(&dp->dl_count); | |
2588 | ||
1da177e4 | 2589 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2590 | |
460781b5 | 2591 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2592 | dp->dl_time = get_seconds(); |
2593 | ||
6b57d9c8 BF |
2594 | nfsd4_cb_recall(dp); |
2595 | } | |
2596 | ||
acfdf5c3 | 2597 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2598 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2599 | { | |
acfdf5c3 BF |
2600 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2601 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2602 | |
7fa10cd1 BF |
2603 | if (!fp) { |
2604 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2605 | return; | |
2606 | } | |
2607 | if (fp->fi_had_conflict) { | |
2608 | WARN(1, "duplicate break on %p\n", fp); | |
2609 | return; | |
2610 | } | |
0272e1fd BF |
2611 | /* |
2612 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2613 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2614 | * in time: |
0272e1fd BF |
2615 | */ |
2616 | fl->fl_break_time = 0; | |
1da177e4 | 2617 | |
5d926e8c | 2618 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2619 | fp->fi_had_conflict = true; |
2620 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2621 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2622 | spin_unlock(&recall_lock); |
1da177e4 LT |
2623 | } |
2624 | ||
1da177e4 LT |
2625 | static |
2626 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2627 | { | |
2628 | if (arg & F_UNLCK) | |
2629 | return lease_modify(onlist, arg); | |
2630 | else | |
2631 | return -EAGAIN; | |
2632 | } | |
2633 | ||
7b021967 | 2634 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2635 | .lm_break = nfsd_break_deleg_cb, |
2636 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2637 | }; |
2638 | ||
7a8711c9 BF |
2639 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2640 | { | |
2641 | if (nfsd4_has_session(cstate)) | |
2642 | return nfs_ok; | |
2643 | if (seqid == so->so_seqid - 1) | |
2644 | return nfserr_replay_me; | |
2645 | if (seqid == so->so_seqid) | |
2646 | return nfs_ok; | |
2647 | return nfserr_bad_seqid; | |
2648 | } | |
1da177e4 | 2649 | |
b37ad28b | 2650 | __be32 |
6668958f | 2651 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 2652 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 2653 | { |
1da177e4 LT |
2654 | clientid_t *clientid = &open->op_clientid; |
2655 | struct nfs4_client *clp = NULL; | |
2656 | unsigned int strhashval; | |
fe0750e5 | 2657 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2658 | __be32 status; |
1da177e4 | 2659 | |
2c142baa | 2660 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2661 | return nfserr_stale_clientid; |
32513b40 BF |
2662 | /* |
2663 | * In case we need it later, after we've already created the | |
2664 | * file and don't want to risk a further failure: | |
2665 | */ | |
2666 | open->op_file = nfsd4_alloc_file(); | |
2667 | if (open->op_file == NULL) | |
2668 | return nfserr_jukebox; | |
1da177e4 | 2669 | |
16bfdaaf | 2670 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 2671 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
2672 | open->op_openowner = oo; |
2673 | if (!oo) { | |
8daae4dc SK |
2674 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2675 | nn); | |
1da177e4 | 2676 | if (clp == NULL) |
0f442aa2 | 2677 | return nfserr_expired; |
bcf130f9 | 2678 | goto new_owner; |
1da177e4 | 2679 | } |
dad1c067 | 2680 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2681 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2682 | clp = oo->oo_owner.so_client; |
2683 | release_openowner(oo); | |
2684 | open->op_openowner = NULL; | |
bcf130f9 | 2685 | goto new_owner; |
0f442aa2 | 2686 | } |
4cdc951b BF |
2687 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2688 | if (status) | |
2689 | return status; | |
2690 | clp = oo->oo_owner.so_client; | |
2691 | goto alloc_stateid; | |
bcf130f9 BF |
2692 | new_owner: |
2693 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2694 | if (oo == NULL) | |
2695 | return nfserr_jukebox; | |
2696 | open->op_openowner = oo; | |
4cdc951b BF |
2697 | alloc_stateid: |
2698 | open->op_stp = nfs4_alloc_stateid(clp); | |
2699 | if (!open->op_stp) | |
2700 | return nfserr_jukebox; | |
0f442aa2 | 2701 | return nfs_ok; |
1da177e4 LT |
2702 | } |
2703 | ||
b37ad28b | 2704 | static inline __be32 |
4a6e43e6 N |
2705 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2706 | { | |
2707 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2708 | return nfserr_openmode; | |
2709 | else | |
2710 | return nfs_ok; | |
2711 | } | |
2712 | ||
f459e453 | 2713 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2714 | { |
f459e453 | 2715 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2716 | } |
2717 | ||
38c2f4b1 | 2718 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2719 | { |
f459e453 | 2720 | struct nfs4_stid *ret; |
24a0111e | 2721 | |
38c2f4b1 | 2722 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2723 | if (!ret) |
2724 | return NULL; | |
2725 | return delegstateid(ret); | |
24a0111e BF |
2726 | } |
2727 | ||
8b289b2c BF |
2728 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2729 | { | |
2730 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2731 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2732 | } | |
2733 | ||
b37ad28b | 2734 | static __be32 |
38c2f4b1 | 2735 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2736 | struct nfs4_delegation **dp) |
2737 | { | |
2738 | int flags; | |
b37ad28b | 2739 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2740 | |
38c2f4b1 | 2741 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2742 | if (*dp == NULL) |
c44c5eeb | 2743 | goto out; |
24a0111e | 2744 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2745 | status = nfs4_check_delegmode(*dp, flags); |
2746 | if (status) | |
2747 | *dp = NULL; | |
c44c5eeb | 2748 | out: |
8b289b2c | 2749 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2750 | return nfs_ok; |
2751 | if (status) | |
2752 | return status; | |
dad1c067 | 2753 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2754 | return nfs_ok; |
567d9829 N |
2755 | } |
2756 | ||
b37ad28b | 2757 | static __be32 |
dcef0413 | 2758 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2759 | { |
dcef0413 | 2760 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2761 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2762 | |
8beefa24 | 2763 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2764 | /* ignore lock owners */ |
2765 | if (local->st_stateowner->so_is_open_owner == 0) | |
2766 | continue; | |
2767 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2768 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2769 | *stpp = local; |
2770 | /* check for conflicting share reservations */ | |
2771 | if (!test_share(local, open)) | |
77eaae8d | 2772 | return nfserr_share_denied; |
1da177e4 | 2773 | } |
77eaae8d | 2774 | return nfs_ok; |
1da177e4 LT |
2775 | } |
2776 | ||
21fb4016 BF |
2777 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2778 | { | |
2779 | int flags = 0; | |
2780 | ||
2781 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2782 | flags |= NFSD_MAY_READ; | |
2783 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2784 | flags |= NFSD_MAY_WRITE; | |
2785 | return flags; | |
2786 | } | |
2787 | ||
0c12eaff CB |
2788 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2789 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2790 | { |
2791 | __be32 status; | |
0c12eaff CB |
2792 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2793 | int access = nfs4_access_to_access(open->op_share_access); | |
2794 | ||
f9d7562f BF |
2795 | if (!fp->fi_fds[oflag]) { |
2796 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2797 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2798 | if (status) |
2799 | return status; | |
2800 | } | |
2801 | nfs4_file_get_access(fp, oflag); | |
2802 | ||
2803 | return nfs_ok; | |
2804 | } | |
2805 | ||
b37ad28b | 2806 | static inline __be32 |
1da177e4 LT |
2807 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2808 | struct nfsd4_open *open) | |
2809 | { | |
2810 | struct iattr iattr = { | |
2811 | .ia_valid = ATTR_SIZE, | |
2812 | .ia_size = 0, | |
2813 | }; | |
2814 | if (!open->op_truncate) | |
2815 | return 0; | |
2816 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2817 | return nfserr_inval; |
1da177e4 LT |
2818 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2819 | } | |
2820 | ||
b37ad28b | 2821 | static __be32 |
dcef0413 | 2822 | 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 | 2823 | { |
b6d2f1ca | 2824 | u32 op_share_access = open->op_share_access; |
7d947842 | 2825 | bool new_access; |
b37ad28b | 2826 | __be32 status; |
1da177e4 | 2827 | |
82c5ff1b | 2828 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2829 | if (new_access) { |
0c12eaff | 2830 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2831 | if (status) |
2832 | return status; | |
6c26d08f | 2833 | } |
1da177e4 LT |
2834 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2835 | if (status) { | |
f9d7562f | 2836 | if (new_access) { |
f197c271 | 2837 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2838 | nfs4_file_put_access(fp, oflag); |
2839 | } | |
1da177e4 LT |
2840 | return status; |
2841 | } | |
2842 | /* remember the open */ | |
82c5ff1b | 2843 | set_access(op_share_access, stp); |
ce0fc43c | 2844 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2845 | |
2846 | return nfs_ok; | |
2847 | } | |
2848 | ||
2849 | ||
1da177e4 | 2850 | static void |
1255a8f3 | 2851 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2852 | { |
dad1c067 | 2853 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2854 | } |
2855 | ||
14a24e99 BF |
2856 | /* Should we give out recallable state?: */ |
2857 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2858 | { | |
2859 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2860 | return true; | |
2861 | /* | |
2862 | * In the sessions case, since we don't have to establish a | |
2863 | * separate connection for callbacks, we assume it's OK | |
2864 | * until we hear otherwise: | |
2865 | */ | |
2866 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2867 | } | |
2868 | ||
22d38c4c BF |
2869 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2870 | { | |
2871 | struct file_lock *fl; | |
2872 | ||
2873 | fl = locks_alloc_lock(); | |
2874 | if (!fl) | |
2875 | return NULL; | |
2876 | locks_init_lock(fl); | |
2877 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2878 | fl->fl_flags = FL_LEASE; | |
2879 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2880 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2881 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2882 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2883 | return fl; |
2884 | } | |
2885 | ||
edab9782 BF |
2886 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2887 | { | |
acfdf5c3 | 2888 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2889 | struct file_lock *fl; |
2890 | int status; | |
2891 | ||
2892 | fl = nfs4_alloc_init_lease(dp, flag); | |
2893 | if (!fl) | |
2894 | return -ENOMEM; | |
acfdf5c3 | 2895 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2896 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2897 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2898 | if (status) { |
acfdf5c3 | 2899 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2900 | locks_free_lock(fl); |
2901 | return -ENOMEM; | |
2902 | } | |
acfdf5c3 | 2903 | fp->fi_lease = fl; |
cb0942b8 | 2904 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
2905 | atomic_set(&fp->fi_delegees, 1); |
2906 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2907 | return 0; | |
2908 | } | |
2909 | ||
2910 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2911 | { | |
2912 | struct nfs4_file *fp = dp->dl_file; | |
2913 | ||
2914 | if (!fp->fi_lease) | |
2915 | return nfs4_setlease(dp, flag); | |
2916 | spin_lock(&recall_lock); | |
2917 | if (fp->fi_had_conflict) { | |
2918 | spin_unlock(&recall_lock); | |
2919 | return -EAGAIN; | |
2920 | } | |
2921 | atomic_inc(&fp->fi_delegees); | |
2922 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2923 | spin_unlock(&recall_lock); | |
2a74aba7 | 2924 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2925 | return 0; |
2926 | } | |
2927 | ||
4aa8913c BH |
2928 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2929 | { | |
2930 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2931 | if (status == -EAGAIN) | |
2932 | open->op_why_no_deleg = WND4_CONTENTION; | |
2933 | else { | |
2934 | open->op_why_no_deleg = WND4_RESOURCE; | |
2935 | switch (open->op_deleg_want) { | |
2936 | case NFS4_SHARE_WANT_READ_DELEG: | |
2937 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2938 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2939 | break; | |
2940 | case NFS4_SHARE_WANT_CANCEL: | |
2941 | open->op_why_no_deleg = WND4_CANCELLED; | |
2942 | break; | |
2943 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 2944 | WARN_ON_ONCE(1); |
4aa8913c BH |
2945 | } |
2946 | } | |
2947 | } | |
2948 | ||
1da177e4 LT |
2949 | /* |
2950 | * Attempt to hand out a delegation. | |
2951 | */ | |
2952 | static void | |
5ccb0066 SK |
2953 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
2954 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
2955 | { |
2956 | struct nfs4_delegation *dp; | |
fe0750e5 | 2957 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2958 | int cb_up; |
d24433cd | 2959 | int status = 0, flag = 0; |
1da177e4 | 2960 | |
fe0750e5 | 2961 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2962 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2963 | open->op_recall = 0; |
2964 | switch (open->op_claim_type) { | |
2965 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2966 | if (!cb_up) |
7b190fec N |
2967 | open->op_recall = 1; |
2968 | flag = open->op_delegate_type; | |
2969 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2970 | goto out; | |
2971 | break; | |
2972 | case NFS4_OPEN_CLAIM_NULL: | |
2973 | /* Let's not give out any delegations till everyone's | |
2974 | * had the chance to reclaim theirs.... */ | |
5ccb0066 | 2975 | if (locks_in_grace(net)) |
7b190fec | 2976 | goto out; |
dad1c067 | 2977 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2978 | goto out; |
2979 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2980 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2981 | else | |
2982 | flag = NFS4_OPEN_DELEGATE_READ; | |
2983 | break; | |
2984 | default: | |
2985 | goto out; | |
2986 | } | |
1da177e4 | 2987 | |
fe0750e5 | 2988 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2989 | if (dp == NULL) |
2990 | goto out_no_deleg; | |
acfdf5c3 | 2991 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2992 | if (status) |
dd239cc0 | 2993 | goto out_free; |
1da177e4 | 2994 | |
d5477a8d | 2995 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2996 | |
8c10cbdb | 2997 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2998 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2999 | out: |
3000 | open->op_delegate_type = flag; | |
d24433cd BH |
3001 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
3002 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
3003 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
3004 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
3005 | ||
4aa8913c BH |
3006 | /* 4.1 client asking for a delegation? */ |
3007 | if (open->op_deleg_want) | |
3008 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 3009 | } |
dd239cc0 BF |
3010 | return; |
3011 | out_free: | |
24ffb938 | 3012 | unhash_stid(&dp->dl_stid); |
acfdf5c3 | 3013 | nfs4_put_delegation(dp); |
dd239cc0 BF |
3014 | out_no_deleg: |
3015 | flag = NFS4_OPEN_DELEGATE_NONE; | |
3016 | goto out; | |
1da177e4 LT |
3017 | } |
3018 | ||
e27f49c3 BH |
3019 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3020 | struct nfs4_delegation *dp) | |
3021 | { | |
3022 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3023 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3024 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3025 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3026 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3027 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3028 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3029 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3030 | } | |
3031 | /* Otherwise the client must be confused wanting a delegation | |
3032 | * it already has, therefore we don't return | |
3033 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3034 | */ | |
3035 | } | |
3036 | ||
1da177e4 LT |
3037 | /* |
3038 | * called with nfs4_lock_state() held. | |
3039 | */ | |
b37ad28b | 3040 | __be32 |
1da177e4 LT |
3041 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3042 | { | |
6668958f | 3043 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3044 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3045 | struct nfs4_file *fp = NULL; |
3046 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3047 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3048 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3049 | __be32 status; |
1da177e4 | 3050 | |
1da177e4 LT |
3051 | /* |
3052 | * Lookup file; if found, lookup stateid and check open request, | |
3053 | * and check for delegations in the process of being recalled. | |
3054 | * If not found, create the nfs4_file struct | |
3055 | */ | |
3056 | fp = find_file(ino); | |
3057 | if (fp) { | |
3058 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3059 | goto out; | |
38c2f4b1 | 3060 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3061 | if (status) |
3062 | goto out; | |
1da177e4 | 3063 | } else { |
c44c5eeb | 3064 | status = nfserr_bad_stateid; |
8b289b2c | 3065 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3066 | goto out; |
3e772463 | 3067 | status = nfserr_jukebox; |
32513b40 BF |
3068 | fp = open->op_file; |
3069 | open->op_file = NULL; | |
3070 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3071 | } |
3072 | ||
3073 | /* | |
3074 | * OPEN the file, or upgrade an existing OPEN. | |
3075 | * If truncate fails, the OPEN fails. | |
3076 | */ | |
3077 | if (stp) { | |
3078 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3079 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3080 | if (status) |
3081 | goto out; | |
3082 | } else { | |
4cdc951b | 3083 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3084 | if (status) |
3085 | goto out; | |
3086 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3087 | if (status) |
1da177e4 | 3088 | goto out; |
4cdc951b BF |
3089 | stp = open->op_stp; |
3090 | open->op_stp = NULL; | |
996e0938 | 3091 | init_open_stateid(stp, fp, open); |
1da177e4 | 3092 | } |
dcef0413 BF |
3093 | update_stateid(&stp->st_stid.sc_stateid); |
3094 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3095 | |
d24433cd | 3096 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3097 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3098 | |
d24433cd BH |
3099 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3100 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3101 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3102 | goto nodeleg; | |
3103 | } | |
3104 | } | |
3105 | ||
1da177e4 LT |
3106 | /* |
3107 | * Attempt to hand out a delegation. No error return, because the | |
3108 | * OPEN succeeds even if we fail. | |
3109 | */ | |
5ccb0066 | 3110 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3111 | nodeleg: |
1da177e4 LT |
3112 | status = nfs_ok; |
3113 | ||
8c10cbdb | 3114 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3115 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3116 | out: |
d24433cd BH |
3117 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3118 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3119 | open->op_deleg_want) |
3120 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3121 | |
13cd2184 N |
3122 | if (fp) |
3123 | put_nfs4_file(fp); | |
37515177 | 3124 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3125 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3126 | /* |
3127 | * To finish the open response, we just need to set the rflags. | |
3128 | */ | |
3129 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3130 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3131 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3132 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3133 | ||
3134 | return status; | |
3135 | } | |
3136 | ||
d29b20cd BF |
3137 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3138 | { | |
3139 | if (open->op_openowner) { | |
3140 | struct nfs4_openowner *oo = open->op_openowner; | |
3141 | ||
3142 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3143 | list_del_init(&oo->oo_close_lru); | |
3144 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3145 | if (status) { | |
3146 | release_openowner(oo); | |
3147 | open->op_openowner = NULL; | |
3148 | } else | |
3149 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3150 | } | |
3151 | } | |
32513b40 BF |
3152 | if (open->op_file) |
3153 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3154 | if (open->op_stp) |
ef79859e | 3155 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3156 | } |
3157 | ||
9b2ef62b BF |
3158 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
3159 | { | |
3160 | struct nfs4_client *found; | |
3161 | ||
3162 | if (STALE_CLIENTID(clid, nn)) | |
3163 | return nfserr_stale_clientid; | |
3164 | found = find_confirmed_client(clid, session, nn); | |
3165 | if (clp) | |
3166 | *clp = found; | |
3167 | return found ? nfs_ok : nfserr_expired; | |
3168 | } | |
3169 | ||
b37ad28b | 3170 | __be32 |
b591480b BF |
3171 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3172 | clientid_t *clid) | |
1da177e4 LT |
3173 | { |
3174 | struct nfs4_client *clp; | |
b37ad28b | 3175 | __be32 status; |
7f2210fa | 3176 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3177 | |
3178 | nfs4_lock_state(); | |
3179 | dprintk("process_renew(%08x/%08x): starting\n", | |
3180 | clid->cl_boot, clid->cl_id); | |
9b2ef62b BF |
3181 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
3182 | if (status) | |
1da177e4 | 3183 | goto out; |
1da177e4 | 3184 | status = nfserr_cb_path_down; |
ea1da636 | 3185 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3186 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3187 | goto out; |
3188 | status = nfs_ok; | |
3189 | out: | |
3190 | nfs4_unlock_state(); | |
3191 | return status; | |
3192 | } | |
3193 | ||
a76b4319 | 3194 | static void |
12760c66 | 3195 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3196 | { |
33dcc481 | 3197 | /* do nothing if grace period already ended */ |
a51c84ed | 3198 | if (nn->grace_ended) |
33dcc481 JL |
3199 | return; |
3200 | ||
a76b4319 | 3201 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3202 | nn->grace_ended = true; |
12760c66 | 3203 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3204 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3205 | /* |
3206 | * Now that every NFSv4 client has had the chance to recover and | |
3207 | * to see the (possibly new, possibly shorter) lease time, we | |
3208 | * can safely set the next grace time to the current lease time: | |
3209 | */ | |
5284b44e | 3210 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3211 | } |
3212 | ||
fd39ca9a | 3213 | static time_t |
09121281 | 3214 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3215 | { |
3216 | struct nfs4_client *clp; | |
fe0750e5 | 3217 | struct nfs4_openowner *oo; |
1da177e4 LT |
3218 | struct nfs4_delegation *dp; |
3219 | struct list_head *pos, *next, reaplist; | |
3d733711 SK |
3220 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
3221 | time_t t, clientid_val = nn->nfsd4_lease; | |
3222 | time_t u, test_val = nn->nfsd4_lease; | |
1da177e4 LT |
3223 | |
3224 | nfs4_lock_state(); | |
3225 | ||
3226 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3227 | nfsd4_end_grace(nn); |
36acb66b | 3228 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3229 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3230 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3231 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3232 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3233 | t = clp->cl_time - cutoff; | |
3234 | if (clientid_val > t) | |
3235 | clientid_val = t; | |
3236 | break; | |
3237 | } | |
d7682988 BH |
3238 | if (atomic_read(&clp->cl_refcount)) { |
3239 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3240 | clp->cl_clientid.cl_id); | |
3241 | continue; | |
3242 | } | |
3243 | unhash_client_locked(clp); | |
3244 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b | 3245 | } |
c9a49628 | 3246 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3247 | list_for_each_safe(pos, next, &reaplist) { |
3248 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3249 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3250 | clp->cl_clientid.cl_id); | |
3251 | expire_client(clp); | |
3252 | } | |
1da177e4 LT |
3253 | spin_lock(&recall_lock); |
3254 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3255 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4e37a7c2 SK |
3256 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3257 | continue; | |
1da177e4 LT |
3258 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
3259 | u = dp->dl_time - cutoff; | |
3260 | if (test_val > u) | |
3261 | test_val = u; | |
3262 | break; | |
3263 | } | |
1da177e4 LT |
3264 | list_move(&dp->dl_recall_lru, &reaplist); |
3265 | } | |
3266 | spin_unlock(&recall_lock); | |
3267 | list_for_each_safe(pos, next, &reaplist) { | |
3268 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3269 | unhash_delegation(dp); |
3270 | } | |
3d733711 | 3271 | test_val = nn->nfsd4_lease; |
73758fed | 3272 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3273 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3274 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3275 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3276 | if (test_val > u) |
3277 | test_val = u; | |
3278 | break; | |
3279 | } | |
fe0750e5 | 3280 | release_openowner(oo); |
1da177e4 LT |
3281 | } |
3282 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3283 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3284 | nfs4_unlock_state(); | |
3285 | return clientid_val; | |
3286 | } | |
3287 | ||
a254b246 HH |
3288 | static struct workqueue_struct *laundry_wq; |
3289 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3290 | |
3291 | static void | |
09121281 | 3292 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3293 | { |
3294 | time_t t; | |
09121281 SK |
3295 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3296 | work); | |
3297 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3298 | laundromat_work); | |
1da177e4 | 3299 | |
09121281 | 3300 | t = nfs4_laundromat(nn); |
1da177e4 | 3301 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3302 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3303 | } |
3304 | ||
f7a4d872 | 3305 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3306 | { |
f7a4d872 BF |
3307 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3308 | return nfserr_bad_stateid; | |
3309 | return nfs_ok; | |
1da177e4 LT |
3310 | } |
3311 | ||
3312 | static int | |
2c142baa | 3313 | STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) |
1da177e4 | 3314 | { |
2c142baa | 3315 | if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) |
e4e83ea4 BF |
3316 | return 0; |
3317 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3318 | STATEID_VAL(stateid)); |
e4e83ea4 | 3319 | return 1; |
1da177e4 LT |
3320 | } |
3321 | ||
3322 | static inline int | |
82c5ff1b | 3323 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3324 | { |
82c5ff1b JL |
3325 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3326 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3327 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3328 | } |
3329 | ||
3330 | static inline int | |
82c5ff1b | 3331 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3332 | { |
82c5ff1b JL |
3333 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3334 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3335 | } |
3336 | ||
3337 | static | |
dcef0413 | 3338 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3339 | { |
b37ad28b | 3340 | __be32 status = nfserr_openmode; |
1da177e4 | 3341 | |
02921914 BF |
3342 | /* For lock stateid's, we test the parent open, not the lock: */ |
3343 | if (stp->st_openstp) | |
3344 | stp = stp->st_openstp; | |
82c5ff1b | 3345 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3346 | goto out; |
82c5ff1b | 3347 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3348 | goto out; |
3349 | status = nfs_ok; | |
3350 | out: | |
3351 | return status; | |
3352 | } | |
3353 | ||
b37ad28b | 3354 | static inline __be32 |
5ccb0066 | 3355 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3356 | { |
203a8c8e | 3357 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3358 | return nfs_ok; |
5ccb0066 | 3359 | else if (locks_in_grace(net)) { |
25985edc | 3360 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3361 | * conflicting state; so we must wait out the grace period. */ |
3362 | return nfserr_grace; | |
3363 | } else if (flags & WR_STATE) | |
3364 | return nfs4_share_conflict(current_fh, | |
3365 | NFS4_SHARE_DENY_WRITE); | |
3366 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3367 | return nfs4_share_conflict(current_fh, | |
3368 | NFS4_SHARE_DENY_READ); | |
3369 | } | |
3370 | ||
3371 | /* | |
3372 | * Allow READ/WRITE during grace period on recovered state only for files | |
3373 | * that are not able to provide mandatory locking. | |
3374 | */ | |
3375 | static inline int | |
5ccb0066 | 3376 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3377 | { |
5ccb0066 | 3378 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3379 | } |
3380 | ||
81b82965 BF |
3381 | /* Returns true iff a is later than b: */ |
3382 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3383 | { | |
3384 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3385 | } | |
3386 | ||
57b7b43b | 3387 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3388 | { |
6668958f AA |
3389 | /* |
3390 | * When sessions are used the stateid generation number is ignored | |
3391 | * when it is zero. | |
3392 | */ | |
28dde241 | 3393 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3394 | return nfs_ok; |
3395 | ||
3396 | if (in->si_generation == ref->si_generation) | |
3397 | return nfs_ok; | |
6668958f | 3398 | |
0836f587 | 3399 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3400 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3401 | return nfserr_bad_stateid; |
3402 | /* | |
81b82965 BF |
3403 | * However, we could see a stateid from the past, even from a |
3404 | * non-buggy client. For example, if the client sends a lock | |
3405 | * while some IO is outstanding, the lock may bump si_generation | |
3406 | * while the IO is still in flight. The client could avoid that | |
3407 | * situation by waiting for responses on all the IO requests, | |
3408 | * but better performance may result in retrying IO that | |
3409 | * receives an old_stateid error if requests are rarely | |
3410 | * reordered in flight: | |
0836f587 | 3411 | */ |
81b82965 | 3412 | return nfserr_old_stateid; |
0836f587 BF |
3413 | } |
3414 | ||
7df302f7 | 3415 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3416 | { |
97b7e3b6 BF |
3417 | struct nfs4_stid *s; |
3418 | struct nfs4_ol_stateid *ols; | |
3419 | __be32 status; | |
17456804 | 3420 | |
7df302f7 CL |
3421 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3422 | return nfserr_bad_stateid; | |
3423 | /* Client debugging aid. */ | |
3424 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3425 | char addr_str[INET6_ADDRSTRLEN]; | |
3426 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3427 | sizeof(addr_str)); | |
3428 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3429 | "with incorrect client ID\n", addr_str); | |
3430 | return nfserr_bad_stateid; | |
3431 | } | |
38c2f4b1 | 3432 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3433 | if (!s) |
7df302f7 | 3434 | return nfserr_bad_stateid; |
36279ac1 | 3435 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3436 | if (status) |
97b7e3b6 BF |
3437 | return status; |
3438 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3439 | return nfs_ok; | |
3440 | ols = openlockstateid(s); | |
3441 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3442 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3443 | return nfserr_bad_stateid; |
3444 | return nfs_ok; | |
17456804 BS |
3445 | } |
3446 | ||
3320fef1 SK |
3447 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
3448 | struct nfs4_stid **s, bool sessions, | |
3449 | struct nfsd_net *nn) | |
38c2f4b1 BF |
3450 | { |
3451 | struct nfs4_client *cl; | |
3452 | ||
3453 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3454 | return nfserr_bad_stateid; | |
2c142baa | 3455 | if (STALE_STATEID(stateid, nn)) |
38c2f4b1 | 3456 | return nfserr_stale_stateid; |
8daae4dc | 3457 | cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions, nn); |
38c2f4b1 BF |
3458 | if (!cl) |
3459 | return nfserr_expired; | |
3460 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3461 | if (!*s) | |
3462 | return nfserr_bad_stateid; | |
3463 | return nfs_ok; | |
3464 | ||
3465 | } | |
3466 | ||
1da177e4 LT |
3467 | /* |
3468 | * Checks for stateid operations | |
3469 | */ | |
b37ad28b | 3470 | __be32 |
5ccb0066 | 3471 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3472 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3473 | { |
69064a27 | 3474 | struct nfs4_stid *s; |
dcef0413 | 3475 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3476 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3477 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3478 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3479 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b37ad28b | 3480 | __be32 status; |
1da177e4 | 3481 | |
1da177e4 LT |
3482 | if (filpp) |
3483 | *filpp = NULL; | |
3484 | ||
5ccb0066 | 3485 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3486 | return nfserr_grace; |
3487 | ||
3488 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3489 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3490 | |
3320fef1 SK |
3491 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
3492 | &s, cstate->minorversion, nn); | |
38c2f4b1 BF |
3493 | if (status) |
3494 | return status; | |
69064a27 BF |
3495 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3496 | if (status) | |
3497 | goto out; | |
f7a4d872 BF |
3498 | switch (s->sc_type) { |
3499 | case NFS4_DELEG_STID: | |
69064a27 | 3500 | dp = delegstateid(s); |
dc9bf700 BF |
3501 | status = nfs4_check_delegmode(dp, flags); |
3502 | if (status) | |
3503 | goto out; | |
43b0178e | 3504 | if (filpp) { |
acfdf5c3 | 3505 | *filpp = dp->dl_file->fi_deleg_file; |
063b0fb9 BF |
3506 | if (!*filpp) { |
3507 | WARN_ON_ONCE(1); | |
3508 | status = nfserr_serverfault; | |
3509 | goto out; | |
3510 | } | |
43b0178e | 3511 | } |
f7a4d872 BF |
3512 | break; |
3513 | case NFS4_OPEN_STID: | |
3514 | case NFS4_LOCK_STID: | |
69064a27 | 3515 | stp = openlockstateid(s); |
f7a4d872 BF |
3516 | status = nfs4_check_fh(current_fh, stp); |
3517 | if (status) | |
1da177e4 | 3518 | goto out; |
fe0750e5 | 3519 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3520 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3521 | goto out; |
a4455be0 BF |
3522 | status = nfs4_check_openmode(stp, flags); |
3523 | if (status) | |
1da177e4 | 3524 | goto out; |
f9d7562f BF |
3525 | if (filpp) { |
3526 | if (flags & RD_STATE) | |
3527 | *filpp = find_readable_file(stp->st_file); | |
3528 | else | |
3529 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3530 | } |
f7a4d872 BF |
3531 | break; |
3532 | default: | |
3533 | return nfserr_bad_stateid; | |
1da177e4 LT |
3534 | } |
3535 | status = nfs_ok; | |
3536 | out: | |
3537 | return status; | |
3538 | } | |
3539 | ||
e1ca12df | 3540 | static __be32 |
dcef0413 | 3541 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3542 | { |
fe0750e5 | 3543 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3544 | return nfserr_locks_held; |
3545 | release_lock_stateid(stp); | |
3546 | return nfs_ok; | |
3547 | } | |
3548 | ||
17456804 BS |
3549 | /* |
3550 | * Test if the stateid is valid | |
3551 | */ | |
3552 | __be32 | |
3553 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3554 | struct nfsd4_test_stateid *test_stateid) | |
3555 | { | |
03cfb420 BS |
3556 | struct nfsd4_test_stateid_id *stateid; |
3557 | struct nfs4_client *cl = cstate->session->se_client; | |
3558 | ||
3559 | nfs4_lock_state(); | |
3560 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3561 | stateid->ts_id_status = |
3562 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3563 | nfs4_unlock_state(); |
3564 | ||
17456804 BS |
3565 | return nfs_ok; |
3566 | } | |
3567 | ||
e1ca12df BS |
3568 | __be32 |
3569 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3570 | struct nfsd4_free_stateid *free_stateid) | |
3571 | { | |
3572 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3573 | struct nfs4_stid *s; |
38c2f4b1 | 3574 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3575 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3576 | |
3577 | nfs4_lock_state(); | |
38c2f4b1 | 3578 | s = find_stateid(cl, stateid); |
2da1cec7 | 3579 | if (!s) |
81b82965 | 3580 | goto out; |
2da1cec7 BF |
3581 | switch (s->sc_type) { |
3582 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3583 | ret = nfserr_locks_held; |
3584 | goto out; | |
2da1cec7 BF |
3585 | case NFS4_OPEN_STID: |
3586 | case NFS4_LOCK_STID: | |
3587 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3588 | if (ret) | |
3589 | goto out; | |
3590 | if (s->sc_type == NFS4_LOCK_STID) | |
3591 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3592 | else | |
3593 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3594 | break; |
3595 | default: | |
3596 | ret = nfserr_bad_stateid; | |
e1ca12df | 3597 | } |
e1ca12df BS |
3598 | out: |
3599 | nfs4_unlock_state(); | |
3600 | return ret; | |
3601 | } | |
3602 | ||
4c4cd222 N |
3603 | static inline int |
3604 | setlkflg (int type) | |
3605 | { | |
3606 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3607 | RD_STATE : WR_STATE; | |
3608 | } | |
1da177e4 | 3609 | |
dcef0413 | 3610 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3611 | { |
3612 | struct svc_fh *current_fh = &cstate->current_fh; | |
3613 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3614 | __be32 status; | |
3615 | ||
c0a5d93e BF |
3616 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3617 | if (status) | |
3618 | return status; | |
f7a4d872 BF |
3619 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3620 | /* | |
3621 | * "Closed" stateid's exist *only* to return | |
3622 | * nfserr_replay_me from the previous step. | |
3623 | */ | |
3624 | return nfserr_bad_stateid; | |
3625 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3626 | if (status) | |
3627 | return status; | |
3628 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3629 | } |
3630 | ||
1da177e4 LT |
3631 | /* |
3632 | * Checks for sequence id mutating operations. | |
3633 | */ | |
b37ad28b | 3634 | static __be32 |
dd453dfd | 3635 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3636 | stateid_t *stateid, char typemask, |
3320fef1 SK |
3637 | struct nfs4_ol_stateid **stpp, |
3638 | struct nfsd_net *nn) | |
1da177e4 | 3639 | { |
0836f587 | 3640 | __be32 status; |
38c2f4b1 | 3641 | struct nfs4_stid *s; |
1da177e4 | 3642 | |
8c10cbdb BH |
3643 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3644 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3645 | |
1da177e4 | 3646 | *stpp = NULL; |
3320fef1 SK |
3647 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
3648 | cstate->minorversion, nn); | |
c0a5d93e BF |
3649 | if (status) |
3650 | return status; | |
38c2f4b1 | 3651 | *stpp = openlockstateid(s); |
c0a5d93e | 3652 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3653 | |
c0a5d93e BF |
3654 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3655 | } | |
39325bd0 | 3656 | |
3320fef1 SK |
3657 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3658 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
3659 | { |
3660 | __be32 status; | |
3661 | struct nfs4_openowner *oo; | |
1da177e4 | 3662 | |
c0a5d93e | 3663 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 3664 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
3665 | if (status) |
3666 | return status; | |
c0a5d93e | 3667 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3668 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3669 | return nfserr_bad_stateid; |
3a4f98bb | 3670 | return nfs_ok; |
1da177e4 LT |
3671 | } |
3672 | ||
b37ad28b | 3673 | __be32 |
ca364317 | 3674 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3675 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3676 | { |
b37ad28b | 3677 | __be32 status; |
fe0750e5 | 3678 | struct nfs4_openowner *oo; |
dcef0413 | 3679 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3680 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3681 | |
3682 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3683 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3684 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3685 | |
ca364317 | 3686 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3687 | if (status) |
3688 | return status; | |
1da177e4 LT |
3689 | |
3690 | nfs4_lock_state(); | |
3691 | ||
9072d5c6 | 3692 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3693 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 3694 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 3695 | if (status) |
68b66e82 | 3696 | goto out; |
fe0750e5 | 3697 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3698 | status = nfserr_bad_stateid; |
dad1c067 | 3699 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3700 | goto out; |
dad1c067 | 3701 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3702 | update_stateid(&stp->st_stid.sc_stateid); |
3703 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3704 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3705 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3706 | |
2a4317c5 | 3707 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3708 | status = nfs_ok; |
1da177e4 | 3709 | out: |
5ec094c1 BF |
3710 | if (!cstate->replay_owner) |
3711 | nfs4_unlock_state(); | |
1da177e4 LT |
3712 | return status; |
3713 | } | |
3714 | ||
6409a5a6 | 3715 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3716 | { |
82c5ff1b | 3717 | if (!test_access(access, stp)) |
6409a5a6 BF |
3718 | return; |
3719 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3720 | clear_access(access, stp); |
6409a5a6 | 3721 | } |
f197c271 | 3722 | |
6409a5a6 BF |
3723 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3724 | { | |
3725 | switch (to_access) { | |
3726 | case NFS4_SHARE_ACCESS_READ: | |
3727 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3728 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3729 | break; | |
3730 | case NFS4_SHARE_ACCESS_WRITE: | |
3731 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3732 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3733 | break; | |
3734 | case NFS4_SHARE_ACCESS_BOTH: | |
3735 | break; | |
3736 | default: | |
063b0fb9 | 3737 | WARN_ON_ONCE(1); |
1da177e4 LT |
3738 | } |
3739 | } | |
3740 | ||
3741 | static void | |
ce0fc43c | 3742 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3743 | { |
3744 | int i; | |
3745 | for (i = 0; i < 4; i++) { | |
3746 | if ((i & deny) != i) | |
ce0fc43c | 3747 | clear_deny(i, stp); |
1da177e4 LT |
3748 | } |
3749 | } | |
3750 | ||
b37ad28b | 3751 | __be32 |
ca364317 BF |
3752 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3753 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3754 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3755 | { |
b37ad28b | 3756 | __be32 status; |
dcef0413 | 3757 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3758 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3759 | |
3760 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3761 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3762 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3763 | |
c30e92df | 3764 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3765 | if (od->od_deleg_want) |
3766 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3767 | od->od_deleg_want); | |
1da177e4 LT |
3768 | |
3769 | nfs4_lock_state(); | |
c0a5d93e | 3770 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 3771 | &od->od_stateid, &stp, nn); |
9072d5c6 | 3772 | if (status) |
1da177e4 | 3773 | goto out; |
1da177e4 | 3774 | status = nfserr_inval; |
82c5ff1b JL |
3775 | if (!test_access(od->od_share_access, stp)) { |
3776 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3777 | stp->st_access_bmap, od->od_share_access); |
3778 | goto out; | |
3779 | } | |
ce0fc43c | 3780 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3781 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3782 | stp->st_deny_bmap, od->od_share_deny); | |
3783 | goto out; | |
3784 | } | |
6409a5a6 | 3785 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3786 | |
ce0fc43c | 3787 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3788 | |
dcef0413 BF |
3789 | update_stateid(&stp->st_stid.sc_stateid); |
3790 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3791 | status = nfs_ok; |
3792 | out: | |
5ec094c1 BF |
3793 | if (!cstate->replay_owner) |
3794 | nfs4_unlock_state(); | |
1da177e4 LT |
3795 | return status; |
3796 | } | |
3797 | ||
38c387b5 BF |
3798 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3799 | { | |
3800 | struct nfs4_openowner *oo; | |
3801 | struct nfs4_ol_stateid *s; | |
3802 | ||
3803 | if (!so->so_is_open_owner) | |
3804 | return; | |
3805 | oo = openowner(so); | |
3806 | s = oo->oo_last_closed_stid; | |
3807 | if (!s) | |
3808 | return; | |
3809 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3810 | /* Release the last_closed_stid on the next seqid bump: */ | |
3811 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3812 | return; | |
3813 | } | |
3814 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3815 | release_last_closed_stateid(oo); |
3816 | } | |
3817 | ||
3818 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3819 | { | |
3820 | unhash_open_stateid(s); | |
3821 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3822 | } |
3823 | ||
1da177e4 LT |
3824 | /* |
3825 | * nfs4_unlock_state() called after encode | |
3826 | */ | |
b37ad28b | 3827 | __be32 |
ca364317 | 3828 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3829 | struct nfsd4_close *close) |
1da177e4 | 3830 | { |
b37ad28b | 3831 | __be32 status; |
fe0750e5 | 3832 | struct nfs4_openowner *oo; |
dcef0413 | 3833 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
3834 | struct net *net = SVC_NET(rqstp); |
3835 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
3836 | |
3837 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3838 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3839 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3840 | |
3841 | nfs4_lock_state(); | |
f7a4d872 BF |
3842 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3843 | &close->cl_stateid, | |
3844 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 3845 | &stp, nn); |
9072d5c6 | 3846 | if (status) |
1da177e4 | 3847 | goto out; |
fe0750e5 | 3848 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3849 | status = nfs_ok; |
dcef0413 BF |
3850 | update_stateid(&stp->st_stid.sc_stateid); |
3851 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3852 | |
f7a4d872 | 3853 | nfsd4_close_open_stateid(stp); |
cf9182e9 | 3854 | release_last_closed_stateid(oo); |
38c387b5 | 3855 | oo->oo_last_closed_stid = stp; |
04ef5954 | 3856 | |
74dbafaf BF |
3857 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3858 | if (cstate->minorversion) { | |
3859 | release_openowner(oo); | |
3860 | cstate->replay_owner = NULL; | |
3861 | } else { | |
3862 | /* | |
3863 | * In the 4.0 case we need to keep the owners around a | |
3864 | * little while to handle CLOSE replay. | |
3865 | */ | |
3866 | if (list_empty(&oo->oo_owner.so_stateids)) | |
73758fed | 3867 | move_to_close_lru(oo, SVC_NET(rqstp)); |
74dbafaf BF |
3868 | } |
3869 | } | |
1da177e4 | 3870 | out: |
5ec094c1 BF |
3871 | if (!cstate->replay_owner) |
3872 | nfs4_unlock_state(); | |
1da177e4 LT |
3873 | return status; |
3874 | } | |
3875 | ||
b37ad28b | 3876 | __be32 |
ca364317 BF |
3877 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3878 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3879 | { |
203a8c8e BF |
3880 | struct nfs4_delegation *dp; |
3881 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3882 | struct nfs4_stid *s; |
b37ad28b | 3883 | __be32 status; |
3320fef1 | 3884 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3885 | |
ca364317 | 3886 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 3887 | return status; |
1da177e4 LT |
3888 | |
3889 | nfs4_lock_state(); | |
3320fef1 SK |
3890 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
3891 | cstate->minorversion, nn); | |
38c2f4b1 | 3892 | if (status) |
203a8c8e | 3893 | goto out; |
38c2f4b1 | 3894 | dp = delegstateid(s); |
d5477a8d | 3895 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3896 | if (status) |
3897 | goto out; | |
203a8c8e BF |
3898 | |
3899 | unhash_delegation(dp); | |
1da177e4 | 3900 | out: |
203a8c8e BF |
3901 | nfs4_unlock_state(); |
3902 | ||
1da177e4 LT |
3903 | return status; |
3904 | } | |
3905 | ||
3906 | ||
1da177e4 | 3907 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3908 | |
009673b4 | 3909 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
1da177e4 | 3910 | |
87df4de8 BH |
3911 | static inline u64 |
3912 | end_offset(u64 start, u64 len) | |
3913 | { | |
3914 | u64 end; | |
3915 | ||
3916 | end = start + len; | |
3917 | return end >= start ? end: NFS4_MAX_UINT64; | |
3918 | } | |
3919 | ||
3920 | /* last octet in a range */ | |
3921 | static inline u64 | |
3922 | last_byte_offset(u64 start, u64 len) | |
3923 | { | |
3924 | u64 end; | |
3925 | ||
063b0fb9 | 3926 | WARN_ON_ONCE(!len); |
87df4de8 BH |
3927 | end = start + len; |
3928 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3929 | } | |
3930 | ||
009673b4 | 3931 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3932 | { |
3933 | return (file_hashval(inode) + cl_id | |
3934 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3935 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3936 | } |
3937 | ||
1da177e4 LT |
3938 | /* |
3939 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3940 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3941 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3942 | * locking, this prevents us from being completely protocol-compliant. The | |
3943 | * real solution to this problem is to start using unsigned file offsets in | |
3944 | * the VFS, but this is a very deep change! | |
3945 | */ | |
3946 | static inline void | |
3947 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3948 | { | |
3949 | if (lock->fl_start < 0) | |
3950 | lock->fl_start = OFFSET_MAX; | |
3951 | if (lock->fl_end < 0) | |
3952 | lock->fl_end = OFFSET_MAX; | |
3953 | } | |
3954 | ||
d5b9026a N |
3955 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3956 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3957 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3958 | }; |
1da177e4 LT |
3959 | |
3960 | static inline void | |
3961 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3962 | { | |
fe0750e5 | 3963 | struct nfs4_lockowner *lo; |
1da177e4 | 3964 | |
d5b9026a | 3965 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3966 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3967 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3968 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3969 | if (!deny->ld_owner.data) |
3970 | /* We just don't care that much */ | |
3971 | goto nevermind; | |
fe0750e5 BF |
3972 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3973 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3974 | } else { |
7c13f344 BF |
3975 | nevermind: |
3976 | deny->ld_owner.len = 0; | |
3977 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3978 | deny->ld_clientid.cl_boot = 0; |
3979 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3980 | } |
3981 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3982 | deny->ld_length = NFS4_MAX_UINT64; |
3983 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3984 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3985 | deny->ld_type = NFS4_READ_LT; | |
3986 | if (fl->fl_type != F_RDLCK) | |
3987 | deny->ld_type = NFS4_WRITE_LT; | |
3988 | } | |
3989 | ||
b93d87c1 BF |
3990 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3991 | { | |
3992 | struct nfs4_ol_stateid *lst; | |
3993 | ||
3994 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3995 | return false; | |
3996 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3997 | struct nfs4_ol_stateid, st_perstateowner); | |
3998 | return lst->st_file->fi_inode == inode; | |
3999 | } | |
4000 | ||
fe0750e5 BF |
4001 | static struct nfs4_lockowner * |
4002 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
20e9e2bc | 4003 | struct xdr_netobj *owner, struct nfsd_net *nn) |
1da177e4 | 4004 | { |
009673b4 | 4005 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 4006 | struct nfs4_lockowner *lo; |
1da177e4 | 4007 | |
20e9e2bc | 4008 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
4009 | if (same_lockowner_ino(lo, inode, clid, owner)) |
4010 | return lo; | |
1da177e4 LT |
4011 | } |
4012 | return NULL; | |
4013 | } | |
4014 | ||
dcef0413 | 4015 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 4016 | { |
009673b4 BF |
4017 | struct inode *inode = open_stp->st_file->fi_inode; |
4018 | unsigned int inohash = lockowner_ino_hashval(inode, | |
4019 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
9b531137 | 4020 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
009673b4 | 4021 | |
9b531137 | 4022 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
20e9e2bc | 4023 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 4024 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
4025 | } |
4026 | ||
1da177e4 LT |
4027 | /* |
4028 | * Alloc a lock owner structure. | |
4029 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4030 | * occurred. |
1da177e4 | 4031 | * |
16bfdaaf | 4032 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4033 | */ |
4034 | ||
fe0750e5 | 4035 | static struct nfs4_lockowner * |
dcef0413 | 4036 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4037 | struct nfs4_lockowner *lo; |
1da177e4 | 4038 | |
fe0750e5 BF |
4039 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4040 | if (!lo) | |
1da177e4 | 4041 | return NULL; |
fe0750e5 BF |
4042 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4043 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4044 | /* It is the openowner seqid that will be incremented in encode in the |
4045 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4046 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4047 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4048 | return lo; | |
1da177e4 LT |
4049 | } |
4050 | ||
dcef0413 BF |
4051 | static struct nfs4_ol_stateid * |
4052 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4053 | { |
dcef0413 | 4054 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4055 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4056 | |
996e0938 | 4057 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4058 | if (stp == NULL) |
6136d2b4 | 4059 | return NULL; |
3abdb607 | 4060 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4061 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4062 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4063 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4064 | get_nfs4_file(fp); |
1da177e4 | 4065 | stp->st_file = fp; |
0997b173 | 4066 | stp->st_access_bmap = 0; |
1da177e4 | 4067 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4068 | stp->st_openstp = open_stp; |
1da177e4 LT |
4069 | return stp; |
4070 | } | |
4071 | ||
fd39ca9a | 4072 | static int |
1da177e4 LT |
4073 | check_lock_length(u64 offset, u64 length) |
4074 | { | |
87df4de8 | 4075 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4076 | LOFF_OVERFLOW(offset, length))); |
4077 | } | |
4078 | ||
dcef0413 | 4079 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4080 | { |
4081 | struct nfs4_file *fp = lock_stp->st_file; | |
4082 | int oflag = nfs4_access_to_omode(access); | |
4083 | ||
82c5ff1b | 4084 | if (test_access(access, lock_stp)) |
0997b173 BF |
4085 | return; |
4086 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4087 | set_access(access, lock_stp); |
0997b173 BF |
4088 | } |
4089 | ||
2355c596 | 4090 | 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 |
4091 | { |
4092 | struct nfs4_file *fi = ost->st_file; | |
4093 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4094 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4095 | struct nfs4_lockowner *lo; | |
4096 | unsigned int strhashval; | |
20e9e2bc | 4097 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4098 | |
20e9e2bc SK |
4099 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
4100 | &lock->v.new.owner, nn); | |
64a284d0 BF |
4101 | if (lo) { |
4102 | if (!cstate->minorversion) | |
4103 | return nfserr_bad_seqid; | |
4104 | /* XXX: a lockowner always has exactly one stateid: */ | |
4105 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4106 | struct nfs4_ol_stateid, st_perstateowner); | |
4107 | return nfs_ok; | |
4108 | } | |
16bfdaaf | 4109 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4110 | &lock->v.new.owner); |
4111 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4112 | if (lo == NULL) | |
4113 | return nfserr_jukebox; | |
4114 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4115 | if (*lst == NULL) { | |
4116 | release_lockowner(lo); | |
4117 | return nfserr_jukebox; | |
4118 | } | |
4119 | *new = true; | |
4120 | return nfs_ok; | |
4121 | } | |
4122 | ||
1da177e4 LT |
4123 | /* |
4124 | * LOCK operation | |
4125 | */ | |
b37ad28b | 4126 | __be32 |
ca364317 | 4127 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4128 | struct nfsd4_lock *lock) |
1da177e4 | 4129 | { |
fe0750e5 BF |
4130 | struct nfs4_openowner *open_sop = NULL; |
4131 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4132 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4133 | struct file *filp = NULL; |
21179d81 JL |
4134 | struct file_lock *file_lock = NULL; |
4135 | struct file_lock *conflock = NULL; | |
b37ad28b | 4136 | __be32 status = 0; |
64a284d0 | 4137 | bool new_state = false; |
b34f27aa | 4138 | int lkflg; |
b8dd7b9a | 4139 | int err; |
3320fef1 SK |
4140 | struct net *net = SVC_NET(rqstp); |
4141 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4142 | |
4143 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4144 | (long long) lock->lk_offset, | |
4145 | (long long) lock->lk_length); | |
4146 | ||
1da177e4 LT |
4147 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4148 | return nfserr_inval; | |
4149 | ||
ca364317 | 4150 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4151 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4152 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4153 | return status; | |
4154 | } | |
4155 | ||
1da177e4 LT |
4156 | nfs4_lock_state(); |
4157 | ||
4158 | if (lock->lk_is_new) { | |
dcef0413 | 4159 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4160 | |
4161 | if (nfsd4_has_session(cstate)) | |
4162 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4163 | memcpy(&lock->v.new.clientid, | |
4164 | &cstate->session->se_client->cl_clientid, | |
4165 | sizeof(clientid_t)); | |
4166 | ||
1da177e4 | 4167 | status = nfserr_stale_clientid; |
2c142baa | 4168 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4169 | goto out; |
1da177e4 | 4170 | |
1da177e4 | 4171 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4172 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4173 | lock->lk_new_open_seqid, |
4174 | &lock->lk_new_open_stateid, | |
3320fef1 | 4175 | &open_stp, nn); |
37515177 | 4176 | if (status) |
1da177e4 | 4177 | goto out; |
fe0750e5 | 4178 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4179 | status = nfserr_bad_stateid; |
684e5638 | 4180 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4181 | &lock->v.new.clientid)) |
4182 | goto out; | |
64a284d0 BF |
4183 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4184 | &lock_stp, &new_state); | |
e1aaa891 | 4185 | } else |
dd453dfd | 4186 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4187 | lock->lk_old_lock_seqid, |
4188 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4189 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4190 | if (status) |
4191 | goto out; | |
64a284d0 | 4192 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4193 | |
b34f27aa BF |
4194 | lkflg = setlkflg(lock->lk_type); |
4195 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4196 | if (status) | |
4197 | goto out; | |
4198 | ||
0dd395dc | 4199 | status = nfserr_grace; |
3320fef1 | 4200 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4201 | goto out; |
4202 | status = nfserr_no_grace; | |
3320fef1 | 4203 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4204 | goto out; |
4205 | ||
21179d81 JL |
4206 | file_lock = locks_alloc_lock(); |
4207 | if (!file_lock) { | |
4208 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4209 | status = nfserr_jukebox; | |
4210 | goto out; | |
4211 | } | |
4212 | ||
4213 | locks_init_lock(file_lock); | |
1da177e4 LT |
4214 | switch (lock->lk_type) { |
4215 | case NFS4_READ_LT: | |
4216 | case NFS4_READW_LT: | |
0997b173 BF |
4217 | filp = find_readable_file(lock_stp->st_file); |
4218 | if (filp) | |
4219 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4220 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4221 | break; |
1da177e4 LT |
4222 | case NFS4_WRITE_LT: |
4223 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4224 | filp = find_writeable_file(lock_stp->st_file); |
4225 | if (filp) | |
4226 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4227 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4228 | break; |
1da177e4 LT |
4229 | default: |
4230 | status = nfserr_inval; | |
4231 | goto out; | |
4232 | } | |
f9d7562f BF |
4233 | if (!filp) { |
4234 | status = nfserr_openmode; | |
4235 | goto out; | |
4236 | } | |
21179d81 JL |
4237 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4238 | file_lock->fl_pid = current->tgid; | |
4239 | file_lock->fl_file = filp; | |
4240 | file_lock->fl_flags = FL_POSIX; | |
4241 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4242 | file_lock->fl_start = lock->lk_offset; | |
4243 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4244 | nfs4_transform_lock_offset(file_lock); | |
4245 | ||
4246 | conflock = locks_alloc_lock(); | |
4247 | if (!conflock) { | |
4248 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4249 | status = nfserr_jukebox; | |
4250 | goto out; | |
4251 | } | |
1da177e4 | 4252 | |
21179d81 | 4253 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4254 | switch (-err) { |
1da177e4 | 4255 | case 0: /* success! */ |
dcef0413 BF |
4256 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4257 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4258 | sizeof(stateid_t)); |
b8dd7b9a | 4259 | status = 0; |
eb76b3fd AA |
4260 | break; |
4261 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4262 | status = nfserr_denied; | |
4263 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4264 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4265 | break; |
1da177e4 LT |
4266 | case (EDEADLK): |
4267 | status = nfserr_deadlock; | |
eb76b3fd | 4268 | break; |
3e772463 | 4269 | default: |
fd85b817 | 4270 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4271 | status = nfserrno(err); |
eb76b3fd | 4272 | break; |
1da177e4 | 4273 | } |
1da177e4 | 4274 | out: |
64a284d0 | 4275 | if (status && new_state) |
f044ff83 | 4276 | release_lockowner(lock_sop); |
5ec094c1 BF |
4277 | if (!cstate->replay_owner) |
4278 | nfs4_unlock_state(); | |
21179d81 JL |
4279 | if (file_lock) |
4280 | locks_free_lock(file_lock); | |
4281 | if (conflock) | |
4282 | locks_free_lock(conflock); | |
1da177e4 LT |
4283 | return status; |
4284 | } | |
4285 | ||
55ef1274 BF |
4286 | /* |
4287 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4288 | * so we do a temporary open here just to get an open file to pass to | |
4289 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4290 | * inode operation.) | |
4291 | */ | |
04da6e9d | 4292 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4293 | { |
4294 | struct file *file; | |
04da6e9d AV |
4295 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4296 | if (!err) { | |
4297 | err = nfserrno(vfs_test_lock(file, lock)); | |
4298 | nfsd_close(file); | |
4299 | } | |
55ef1274 BF |
4300 | return err; |
4301 | } | |
4302 | ||
1da177e4 LT |
4303 | /* |
4304 | * LOCKT operation | |
4305 | */ | |
b37ad28b | 4306 | __be32 |
ca364317 BF |
4307 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4308 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4309 | { |
4310 | struct inode *inode; | |
21179d81 | 4311 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4312 | struct nfs4_lockowner *lo; |
b37ad28b | 4313 | __be32 status; |
7f2210fa | 4314 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4315 | |
5ccb0066 | 4316 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4317 | return nfserr_grace; |
4318 | ||
4319 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4320 | return nfserr_inval; | |
4321 | ||
1da177e4 LT |
4322 | nfs4_lock_state(); |
4323 | ||
9b2ef62b BF |
4324 | if (!nfsd4_has_session(cstate)) { |
4325 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); | |
4326 | if (status) | |
4327 | goto out; | |
4328 | } | |
1da177e4 | 4329 | |
75c096f7 | 4330 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4331 | goto out; |
1da177e4 | 4332 | |
ca364317 | 4333 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4334 | file_lock = locks_alloc_lock(); |
4335 | if (!file_lock) { | |
4336 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4337 | status = nfserr_jukebox; | |
4338 | goto out; | |
4339 | } | |
4340 | locks_init_lock(file_lock); | |
1da177e4 LT |
4341 | switch (lockt->lt_type) { |
4342 | case NFS4_READ_LT: | |
4343 | case NFS4_READW_LT: | |
21179d81 | 4344 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4345 | break; |
4346 | case NFS4_WRITE_LT: | |
4347 | case NFS4_WRITEW_LT: | |
21179d81 | 4348 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4349 | break; |
4350 | default: | |
2fdada03 | 4351 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4352 | status = nfserr_inval; |
4353 | goto out; | |
4354 | } | |
4355 | ||
20e9e2bc | 4356 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4357 | if (lo) |
21179d81 JL |
4358 | file_lock->fl_owner = (fl_owner_t)lo; |
4359 | file_lock->fl_pid = current->tgid; | |
4360 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4361 | |
21179d81 JL |
4362 | file_lock->fl_start = lockt->lt_offset; |
4363 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4364 | |
21179d81 | 4365 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4366 | |
21179d81 | 4367 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4368 | if (status) |
fd85b817 | 4369 | goto out; |
04da6e9d | 4370 | |
21179d81 | 4371 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4372 | status = nfserr_denied; |
21179d81 | 4373 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4374 | } |
4375 | out: | |
4376 | nfs4_unlock_state(); | |
21179d81 JL |
4377 | if (file_lock) |
4378 | locks_free_lock(file_lock); | |
1da177e4 LT |
4379 | return status; |
4380 | } | |
4381 | ||
b37ad28b | 4382 | __be32 |
ca364317 | 4383 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4384 | struct nfsd4_locku *locku) |
1da177e4 | 4385 | { |
dcef0413 | 4386 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4387 | struct file *filp = NULL; |
21179d81 | 4388 | struct file_lock *file_lock = NULL; |
b37ad28b | 4389 | __be32 status; |
b8dd7b9a | 4390 | int err; |
3320fef1 SK |
4391 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4392 | ||
1da177e4 LT |
4393 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4394 | (long long) locku->lu_offset, | |
4395 | (long long) locku->lu_length); | |
4396 | ||
4397 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4398 | return nfserr_inval; | |
4399 | ||
4400 | nfs4_lock_state(); | |
4401 | ||
9072d5c6 | 4402 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4403 | &locku->lu_stateid, NFS4_LOCK_STID, |
4404 | &stp, nn); | |
9072d5c6 | 4405 | if (status) |
1da177e4 | 4406 | goto out; |
f9d7562f BF |
4407 | filp = find_any_file(stp->st_file); |
4408 | if (!filp) { | |
4409 | status = nfserr_lock_range; | |
4410 | goto out; | |
4411 | } | |
21179d81 JL |
4412 | file_lock = locks_alloc_lock(); |
4413 | if (!file_lock) { | |
4414 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4415 | status = nfserr_jukebox; | |
4416 | goto out; | |
4417 | } | |
4418 | locks_init_lock(file_lock); | |
4419 | file_lock->fl_type = F_UNLCK; | |
4420 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); | |
4421 | file_lock->fl_pid = current->tgid; | |
4422 | file_lock->fl_file = filp; | |
4423 | file_lock->fl_flags = FL_POSIX; | |
4424 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4425 | file_lock->fl_start = locku->lu_offset; | |
4426 | ||
4427 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4428 | locku->lu_length); | |
4429 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 LT |
4430 | |
4431 | /* | |
4432 | * Try to unlock the file in the VFS. | |
4433 | */ | |
21179d81 | 4434 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4435 | if (err) { |
fd85b817 | 4436 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4437 | goto out_nfserr; |
4438 | } | |
4439 | /* | |
4440 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4441 | */ | |
dcef0413 BF |
4442 | update_stateid(&stp->st_stid.sc_stateid); |
4443 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4444 | |
4445 | out: | |
71c3bcd7 BF |
4446 | if (!cstate->replay_owner) |
4447 | nfs4_unlock_state(); | |
21179d81 JL |
4448 | if (file_lock) |
4449 | locks_free_lock(file_lock); | |
1da177e4 LT |
4450 | return status; |
4451 | ||
4452 | out_nfserr: | |
b8dd7b9a | 4453 | status = nfserrno(err); |
1da177e4 LT |
4454 | goto out; |
4455 | } | |
4456 | ||
4457 | /* | |
4458 | * returns | |
4459 | * 1: locks held by lockowner | |
4460 | * 0: no locks held by lockowner | |
4461 | */ | |
4462 | static int | |
fe0750e5 | 4463 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4464 | { |
4465 | struct file_lock **flpp; | |
f9d7562f | 4466 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4467 | int status = 0; |
4468 | ||
b89f4321 | 4469 | lock_flocks(); |
1da177e4 | 4470 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4471 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4472 | status = 1; |
4473 | goto out; | |
796dadfd | 4474 | } |
1da177e4 LT |
4475 | } |
4476 | out: | |
b89f4321 | 4477 | unlock_flocks(); |
1da177e4 LT |
4478 | return status; |
4479 | } | |
4480 | ||
b37ad28b | 4481 | __be32 |
b591480b BF |
4482 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4483 | struct nfsd4_compound_state *cstate, | |
4484 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4485 | { |
4486 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4487 | struct nfs4_stateowner *sop; |
fe0750e5 | 4488 | struct nfs4_lockowner *lo; |
dcef0413 | 4489 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4490 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4491 | struct list_head matches; |
16bfdaaf | 4492 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4493 | __be32 status; |
7f2210fa | 4494 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4495 | |
4496 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4497 | clid->cl_boot, clid->cl_id); | |
4498 | ||
1da177e4 LT |
4499 | nfs4_lock_state(); |
4500 | ||
9b2ef62b BF |
4501 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
4502 | if (status) | |
4503 | goto out; | |
4504 | ||
3e9e3dbe | 4505 | status = nfserr_locks_held; |
3e9e3dbe | 4506 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4507 | |
9b531137 | 4508 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
4509 | if (sop->so_is_open_owner) |
4510 | continue; | |
06f1f864 BF |
4511 | if (!same_owner_str(sop, owner, clid)) |
4512 | continue; | |
4513 | list_for_each_entry(stp, &sop->so_stateids, | |
4514 | st_perstateowner) { | |
4515 | lo = lockowner(sop); | |
4516 | if (check_for_locks(stp->st_file, lo)) | |
4517 | goto out; | |
4518 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4519 | } |
3e9e3dbe N |
4520 | } |
4521 | /* Clients probably won't expect us to return with some (but not all) | |
4522 | * of the lockowner state released; so don't release any until all | |
4523 | * have been checked. */ | |
4524 | status = nfs_ok; | |
0fa822e4 | 4525 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4526 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4527 | lo_list); | |
0fa822e4 N |
4528 | /* unhash_stateowner deletes so_perclient only |
4529 | * for openowners. */ | |
fe0750e5 BF |
4530 | list_del(&lo->lo_list); |
4531 | release_lockowner(lo); | |
1da177e4 LT |
4532 | } |
4533 | out: | |
4534 | nfs4_unlock_state(); | |
4535 | return status; | |
4536 | } | |
4537 | ||
4538 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4539 | alloc_reclaim(void) |
1da177e4 | 4540 | { |
a55370a3 | 4541 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4542 | } |
4543 | ||
0ce0c2b5 | 4544 | bool |
52e19c09 | 4545 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4546 | { |
0ce0c2b5 | 4547 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4548 | |
52e19c09 | 4549 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4550 | return (crp && crp->cr_clp); |
c7b9a459 N |
4551 | } |
4552 | ||
1da177e4 LT |
4553 | /* |
4554 | * failure => all reset bets are off, nfserr_no_grace... | |
4555 | */ | |
772a9bbb | 4556 | struct nfs4_client_reclaim * |
52e19c09 | 4557 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4558 | { |
4559 | unsigned int strhashval; | |
772a9bbb | 4560 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4561 | |
a55370a3 N |
4562 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4563 | crp = alloc_reclaim(); | |
772a9bbb JL |
4564 | if (crp) { |
4565 | strhashval = clientstr_hashval(name); | |
4566 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4567 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4568 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4569 | crp->cr_clp = NULL; |
52e19c09 | 4570 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4571 | } |
4572 | return crp; | |
1da177e4 LT |
4573 | } |
4574 | ||
ce30e539 | 4575 | void |
52e19c09 | 4576 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4577 | { |
4578 | list_del(&crp->cr_strhash); | |
4579 | kfree(crp); | |
52e19c09 | 4580 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4581 | } |
4582 | ||
2a4317c5 | 4583 | void |
52e19c09 | 4584 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4585 | { |
4586 | struct nfs4_client_reclaim *crp = NULL; | |
4587 | int i; | |
4588 | ||
1da177e4 | 4589 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4590 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4591 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4592 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4593 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4594 | } |
4595 | } | |
063b0fb9 | 4596 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4597 | } |
4598 | ||
4599 | /* | |
4600 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4601 | struct nfs4_client_reclaim * |
52e19c09 | 4602 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4603 | { |
4604 | unsigned int strhashval; | |
1da177e4 LT |
4605 | struct nfs4_client_reclaim *crp = NULL; |
4606 | ||
278c931c | 4607 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4608 | |
278c931c | 4609 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4610 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4611 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4612 | return crp; |
4613 | } | |
4614 | } | |
4615 | return NULL; | |
4616 | } | |
4617 | ||
4618 | /* | |
4619 | * Called from OPEN. Look for clientid in reclaim list. | |
4620 | */ | |
b37ad28b | 4621 | __be32 |
3320fef1 | 4622 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4623 | { |
a52d726b JL |
4624 | struct nfs4_client *clp; |
4625 | ||
4626 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4627 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4628 | if (clp == NULL) |
4629 | return nfserr_reclaim_bad; | |
4630 | ||
4631 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4632 | } |
4633 | ||
65178db4 BS |
4634 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4635 | ||
44e34da6 BS |
4636 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4637 | { | |
4638 | expire_client(clp); | |
4639 | return 1; | |
4640 | } | |
4641 | ||
184c1847 BS |
4642 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4643 | { | |
4644 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4645 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4646 | printk(KERN_INFO "NFS Client: %s\n", buf); |
4647 | return 1; | |
4648 | } | |
4649 | ||
4650 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
4651 | const char *type) | |
4652 | { | |
4653 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4654 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4655 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
4656 | } | |
4657 | ||
fc29171f BS |
4658 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) |
4659 | { | |
4660 | struct nfs4_openowner *oop; | |
4661 | struct nfs4_lockowner *lop, *lo_next; | |
4662 | struct nfs4_ol_stateid *stp, *st_next; | |
4663 | u64 count = 0; | |
4664 | ||
4665 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
4666 | list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { | |
4667 | list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { | |
4668 | if (func) | |
4669 | func(lop); | |
4670 | if (++count == max) | |
4671 | return count; | |
4672 | } | |
4673 | } | |
4674 | } | |
4675 | ||
4676 | return count; | |
4677 | } | |
4678 | ||
4679 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
4680 | { | |
4681 | return nfsd_foreach_client_lock(clp, max, release_lockowner); | |
4682 | } | |
4683 | ||
184c1847 BS |
4684 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
4685 | { | |
4686 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
4687 | nfsd_print_count(clp, count, "locked files"); | |
4688 | return count; | |
4689 | } | |
4690 | ||
4dbdbda8 BS |
4691 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
4692 | { | |
4693 | struct nfs4_openowner *oop, *next; | |
4694 | u64 count = 0; | |
4695 | ||
4696 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
4697 | if (func) | |
4698 | func(oop); | |
4699 | if (++count == max) | |
4700 | break; | |
4701 | } | |
4702 | ||
4703 | return count; | |
4704 | } | |
4705 | ||
4706 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
4707 | { | |
4708 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
4709 | } | |
4710 | ||
184c1847 BS |
4711 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
4712 | { | |
4713 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
4714 | nfsd_print_count(clp, count, "open files"); | |
4715 | return count; | |
4716 | } | |
4717 | ||
269de30f BS |
4718 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
4719 | struct list_head *victims) | |
4720 | { | |
4721 | struct nfs4_delegation *dp, *next; | |
4722 | u64 count = 0; | |
4723 | ||
4724 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { | |
4725 | if (victims) | |
4726 | list_move(&dp->dl_recall_lru, victims); | |
4727 | if (++count == max) | |
4728 | break; | |
4729 | } | |
4730 | return count; | |
4731 | } | |
4732 | ||
4733 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
4734 | { | |
4735 | struct nfs4_delegation *dp, *next; | |
4736 | LIST_HEAD(victims); | |
4737 | u64 count; | |
4738 | ||
4739 | spin_lock(&recall_lock); | |
4740 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4741 | spin_unlock(&recall_lock); | |
4742 | ||
4743 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4744 | unhash_delegation(dp); | |
4745 | ||
4746 | return count; | |
4747 | } | |
4748 | ||
4749 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
4750 | { | |
4751 | struct nfs4_delegation *dp, *next; | |
4752 | LIST_HEAD(victims); | |
4753 | u64 count; | |
4754 | ||
4755 | spin_lock(&recall_lock); | |
4756 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4757 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4758 | nfsd_break_one_deleg(dp); | |
4759 | spin_unlock(&recall_lock); | |
4760 | ||
4761 | return count; | |
4762 | } | |
4763 | ||
184c1847 BS |
4764 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
4765 | { | |
4766 | u64 count = 0; | |
4767 | ||
4768 | spin_lock(&recall_lock); | |
4769 | count = nfsd_find_all_delegations(clp, max, NULL); | |
4770 | spin_unlock(&recall_lock); | |
4771 | ||
4772 | nfsd_print_count(clp, count, "delegations"); | |
4773 | return count; | |
4774 | } | |
4775 | ||
44e34da6 | 4776 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
4777 | { |
4778 | struct nfs4_client *clp, *next; | |
44e34da6 | 4779 | u64 count = 0; |
3320fef1 | 4780 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 4781 | |
44e34da6 BS |
4782 | if (!nfsd_netns_ready(nn)) |
4783 | return 0; | |
4784 | ||
5ed58bb2 | 4785 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
4786 | count += func(clp, max - count); |
4787 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
4788 | break; |
4789 | } | |
65178db4 | 4790 | |
44e34da6 BS |
4791 | return count; |
4792 | } | |
4793 | ||
6c1e82a4 BS |
4794 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
4795 | { | |
4796 | struct nfs4_client *clp; | |
4797 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
4798 | ||
4799 | if (!nfsd_netns_ready(nn)) | |
4800 | return NULL; | |
4801 | ||
4802 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
4803 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
4804 | return clp; | |
4805 | } | |
4806 | return NULL; | |
4807 | } | |
4808 | ||
65178db4 BS |
4809 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
4810 | ||
ac4d8ff2 | 4811 | /* initialization to perform at module load time: */ |
1da177e4 | 4812 | |
72083396 | 4813 | void |
ac4d8ff2 | 4814 | nfs4_state_init(void) |
1da177e4 | 4815 | { |
72083396 | 4816 | int i; |
1da177e4 | 4817 | |
1da177e4 LT |
4818 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4819 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4820 | } | |
1da177e4 | 4821 | INIT_LIST_HEAD(&del_recall_lru); |
ac4d8ff2 N |
4822 | } |
4823 | ||
c2f1a551 MS |
4824 | /* |
4825 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4826 | * client may quite reasonably hang on to a delegation as long as it has | |
4827 | * the inode cached. This becomes an obvious problem the first time a | |
4828 | * client's inode cache approaches the size of the server's total memory. | |
4829 | * | |
4830 | * For now we avoid this problem by imposing a hard limit on the number | |
4831 | * of delegations, which varies according to the server's memory size. | |
4832 | */ | |
4833 | static void | |
4834 | set_max_delegations(void) | |
4835 | { | |
4836 | /* | |
4837 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4838 | * estimates suggest that in the worst case (where every delegation | |
4839 | * is for a different inode), a delegation could take about 1.5K, | |
4840 | * giving a worst case usage of about 6% of memory. | |
4841 | */ | |
4842 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4843 | } | |
4844 | ||
d85ed443 | 4845 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
4846 | { |
4847 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4848 | int i; | |
4849 | ||
4850 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
4851 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4852 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 4853 | goto err; |
0a7ec377 SK |
4854 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
4855 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4856 | if (!nn->unconf_id_hashtbl) | |
4857 | goto err_unconf_id; | |
9b531137 SK |
4858 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
4859 | OWNER_HASH_SIZE, GFP_KERNEL); | |
4860 | if (!nn->ownerstr_hashtbl) | |
4861 | goto err_ownerstr; | |
20e9e2bc SK |
4862 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
4863 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); | |
4864 | if (!nn->lockowner_ino_hashtbl) | |
4865 | goto err_lockowner_ino; | |
1872de0e SK |
4866 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
4867 | SESSION_HASH_SIZE, GFP_KERNEL); | |
4868 | if (!nn->sessionid_hashtbl) | |
4869 | goto err_sessionid; | |
8daae4dc | 4870 | |
382a62e7 | 4871 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 4872 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 4873 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 4874 | } |
9b531137 SK |
4875 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
4876 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
20e9e2bc SK |
4877 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4878 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); | |
1872de0e SK |
4879 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4880 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 4881 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 4882 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 4883 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 4884 | INIT_LIST_HEAD(&nn->close_lru); |
c9a49628 | 4885 | spin_lock_init(&nn->client_lock); |
8daae4dc | 4886 | |
09121281 | 4887 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 4888 | get_net(net); |
09121281 | 4889 | |
8daae4dc | 4890 | return 0; |
382a62e7 | 4891 | |
1872de0e SK |
4892 | err_sessionid: |
4893 | kfree(nn->lockowner_ino_hashtbl); | |
20e9e2bc SK |
4894 | err_lockowner_ino: |
4895 | kfree(nn->ownerstr_hashtbl); | |
9b531137 SK |
4896 | err_ownerstr: |
4897 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
4898 | err_unconf_id: |
4899 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
4900 | err: |
4901 | return -ENOMEM; | |
8daae4dc SK |
4902 | } |
4903 | ||
4904 | static void | |
4dce0ac9 | 4905 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
4906 | { |
4907 | int i; | |
4908 | struct nfs4_client *clp = NULL; | |
4909 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
a99454aa | 4910 | struct rb_node *node, *tmp; |
8daae4dc SK |
4911 | |
4912 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
4913 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
4914 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4915 | destroy_client(clp); | |
4916 | } | |
4917 | } | |
a99454aa SK |
4918 | |
4919 | node = rb_first(&nn->unconf_name_tree); | |
4920 | while (node != NULL) { | |
4921 | tmp = node; | |
4922 | node = rb_next(tmp); | |
4923 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
4924 | rb_erase(tmp, &nn->unconf_name_tree); | |
4925 | destroy_client(clp); | |
4926 | } | |
4927 | ||
1872de0e | 4928 | kfree(nn->sessionid_hashtbl); |
20e9e2bc | 4929 | kfree(nn->lockowner_ino_hashtbl); |
9b531137 | 4930 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 4931 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 4932 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 4933 | put_net(net); |
8daae4dc SK |
4934 | } |
4935 | ||
f252bc68 | 4936 | int |
d85ed443 | 4937 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 4938 | { |
5e1533c7 | 4939 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
4940 | int ret; |
4941 | ||
f252bc68 SK |
4942 | /* |
4943 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4944 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4945 | * need to pass a net pointer into this function, take a reference | |
4946 | * to that instead and then do most of the rest of this on a per-net | |
4947 | * basis. | |
4948 | */ | |
4949 | if (net != &init_net) | |
4950 | return -EINVAL; | |
4951 | ||
d85ed443 | 4952 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
4953 | if (ret) |
4954 | return ret; | |
5e1533c7 | 4955 | nfsd4_client_tracking_init(net); |
2c142baa | 4956 | nn->boot_time = get_seconds(); |
5ccb0066 | 4957 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 4958 | nn->grace_ended = false; |
d85ed443 | 4959 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
4960 | nn->nfsd4_grace, net); |
4961 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
4962 | return 0; |
4963 | } | |
4964 | ||
4965 | /* initialization to perform when the nfsd service is started: */ | |
4966 | ||
4967 | int | |
4968 | nfs4_state_start(void) | |
4969 | { | |
4970 | int ret; | |
4971 | ||
b5a1a81e | 4972 | ret = set_callback_cred(); |
d85ed443 SK |
4973 | if (ret) |
4974 | return -ENOMEM; | |
58da282b | 4975 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4976 | if (laundry_wq == NULL) { |
4977 | ret = -ENOMEM; | |
4978 | goto out_recovery; | |
4979 | } | |
b5a1a81e BF |
4980 | ret = nfsd4_create_callback_queue(); |
4981 | if (ret) | |
4982 | goto out_free_laundry; | |
09121281 | 4983 | |
c2f1a551 | 4984 | set_max_delegations(); |
d85ed443 | 4985 | |
b5a1a81e | 4986 | return 0; |
d85ed443 | 4987 | |
b5a1a81e BF |
4988 | out_free_laundry: |
4989 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4990 | out_recovery: |
b5a1a81e | 4991 | return ret; |
1da177e4 LT |
4992 | } |
4993 | ||
ac55fdc4 | 4994 | /* should be called with the state lock held */ |
f252bc68 | 4995 | void |
4dce0ac9 | 4996 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 4997 | { |
1da177e4 | 4998 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 4999 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5000 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5001 | |
4dce0ac9 SK |
5002 | cancel_delayed_work_sync(&nn->laundromat_work); |
5003 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5004 | |
1da177e4 LT |
5005 | INIT_LIST_HEAD(&reaplist); |
5006 | spin_lock(&recall_lock); | |
5007 | list_for_each_safe(pos, next, &del_recall_lru) { | |
5008 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4e37a7c2 SK |
5009 | if (dp->dl_stid.sc_client->net != net) |
5010 | continue; | |
1da177e4 LT |
5011 | list_move(&dp->dl_recall_lru, &reaplist); |
5012 | } | |
5013 | spin_unlock(&recall_lock); | |
5014 | list_for_each_safe(pos, next, &reaplist) { | |
5015 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
5016 | unhash_delegation(dp); |
5017 | } | |
5018 | ||
3320fef1 | 5019 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5020 | nfs4_state_destroy_net(net); |
1da177e4 LT |
5021 | } |
5022 | ||
5023 | void | |
5024 | nfs4_state_shutdown(void) | |
5025 | { | |
5e8d5c29 | 5026 | destroy_workqueue(laundry_wq); |
c3935e30 | 5027 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5028 | } |
8b70484c TM |
5029 | |
5030 | static void | |
5031 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5032 | { | |
37c593c5 TM |
5033 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5034 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5035 | } |
5036 | ||
5037 | static void | |
5038 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5039 | { | |
37c593c5 TM |
5040 | if (cstate->minorversion) { |
5041 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5042 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5043 | } | |
5044 | } | |
5045 | ||
5046 | void | |
5047 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5048 | { | |
5049 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5050 | } |
5051 | ||
62cd4a59 TM |
5052 | /* |
5053 | * functions to set current state id | |
5054 | */ | |
9428fe1a TM |
5055 | void |
5056 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5057 | { | |
5058 | put_stateid(cstate, &odp->od_stateid); | |
5059 | } | |
5060 | ||
8b70484c TM |
5061 | void |
5062 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5063 | { | |
5064 | put_stateid(cstate, &open->op_stateid); | |
5065 | } | |
5066 | ||
62cd4a59 TM |
5067 | void |
5068 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5069 | { | |
5070 | put_stateid(cstate, &close->cl_stateid); | |
5071 | } | |
5072 | ||
5073 | void | |
5074 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5075 | { | |
5076 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5077 | } | |
5078 | ||
5079 | /* | |
5080 | * functions to consume current state id | |
5081 | */ | |
1e97b519 | 5082 | |
9428fe1a TM |
5083 | void |
5084 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5085 | { | |
5086 | get_stateid(cstate, &odp->od_stateid); | |
5087 | } | |
5088 | ||
5089 | void | |
5090 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5091 | { | |
5092 | get_stateid(cstate, &drp->dr_stateid); | |
5093 | } | |
5094 | ||
1e97b519 TM |
5095 | void |
5096 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5097 | { | |
5098 | get_stateid(cstate, &fsp->fr_stateid); | |
5099 | } | |
5100 | ||
5101 | void | |
5102 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5103 | { | |
5104 | get_stateid(cstate, &setattr->sa_stateid); | |
5105 | } | |
5106 | ||
8b70484c TM |
5107 | void |
5108 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5109 | { | |
5110 | get_stateid(cstate, &close->cl_stateid); | |
5111 | } | |
5112 | ||
5113 | void | |
62cd4a59 | 5114 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5115 | { |
62cd4a59 | 5116 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5117 | } |
30813e27 TM |
5118 | |
5119 | void | |
5120 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5121 | { | |
5122 | get_stateid(cstate, &read->rd_stateid); | |
5123 | } | |
5124 | ||
5125 | void | |
5126 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5127 | { | |
5128 | get_stateid(cstate, &write->wr_stateid); | |
5129 | } |