projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: define a function to update nfsi->cache_change_attribute
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
006ea73e 54#include "iostat.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
2066fe89 58#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
cdd4e68b 61struct nfs4_opendata;
864472e9 62static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 63static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 64static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
faf5f49c 65static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
adfa6f98 66static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
9936781d
TM		 67static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
68static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 69
1da177e4
LT		 70/* Prevent leaks of NFSv4 errors into userland */
71int nfs4_map_errors(int err)
72{
73 if (err < -1000) {
74 dprintk("%s could not handle NFSv4 error %d\n",
75 __FUNCTION__, -err);
76 return -EIO;
77 }
78 return err;
79}
80
81/*
82 * This is our standard bitmap for GETATTR requests.
83 */
84const u32 nfs4_fattr_bitmap[2] = {
85 FATTR4_WORD0_TYPE
86 | FATTR4_WORD0_CHANGE
87 | FATTR4_WORD0_SIZE
88 | FATTR4_WORD0_FSID
89 | FATTR4_WORD0_FILEID,
90 FATTR4_WORD1_MODE
91 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER
93 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_RAWDEV
95 | FATTR4_WORD1_SPACE_USED
96 | FATTR4_WORD1_TIME_ACCESS
97 | FATTR4_WORD1_TIME_METADATA
98 | FATTR4_WORD1_TIME_MODIFY
99};
100
101const u32 nfs4_statfs_bitmap[2] = {
102 FATTR4_WORD0_FILES_AVAIL
103 | FATTR4_WORD0_FILES_FREE
104 | FATTR4_WORD0_FILES_TOTAL,
105 FATTR4_WORD1_SPACE_AVAIL
106 | FATTR4_WORD1_SPACE_FREE
107 | FATTR4_WORD1_SPACE_TOTAL
108};
109
4ce79717 110const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 111 FATTR4_WORD0_MAXLINK
112 | FATTR4_WORD0_MAXNAME,
113 0
114};
115
116const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
117 | FATTR4_WORD0_MAXREAD
118 | FATTR4_WORD0_MAXWRITE
119 | FATTR4_WORD0_LEASE_TIME,
120 0
121};
122
830b8e33
MN		 123const u32 nfs4_fs_locations_bitmap[2] = {
124 FATTR4_WORD0_TYPE
125 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_SIZE
127 | FATTR4_WORD0_FSID
128 | FATTR4_WORD0_FILEID
129 | FATTR4_WORD0_FS_LOCATIONS,
130 FATTR4_WORD1_MODE
131 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER
133 | FATTR4_WORD1_OWNER_GROUP
134 | FATTR4_WORD1_RAWDEV
135 | FATTR4_WORD1_SPACE_USED
136 | FATTR4_WORD1_TIME_ACCESS
137 | FATTR4_WORD1_TIME_METADATA
138 | FATTR4_WORD1_TIME_MODIFY
139 | FATTR4_WORD1_MOUNTED_ON_FILEID
140};
141
bc4785cd 142static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 143 struct nfs4_readdir_arg *readdir)
144{
0dbb4c67 145 __be32 *start, *p;
1da177e4
LT		 146
147 BUG_ON(readdir->count < 80);
148 if (cookie > 2) {
b7ef1956 149 readdir->cookie = cookie;
1da177e4
LT		 150 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
151 return;
152 }
153
154 readdir->cookie = 0;
155 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
156 if (cookie == 2)
157 return;
158
159 /*
160 * NFSv4 servers do not return entries for '.' and '..'
161 * Therefore, we fake these entries here. We let '.'
162 * have cookie 0 and '..' have cookie 1. Note that
163 * when talking to the server, we always send cookie 0
164 * instead of 1 or 2.
165 */
0dbb4c67 166 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 167
168 if (cookie == 0) {
169 *p++ = xdr_one; /* next */
170 *p++ = xdr_zero; /* cookie, first word */
171 *p++ = xdr_one; /* cookie, second word */
172 *p++ = xdr_one; /* entry len */
173 memcpy(p, ".\0\0\0", 4); /* entry */
174 p++;
175 *p++ = xdr_one; /* bitmap length */
176 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
177 *p++ = htonl(8); /* attribute buffer length */
4e769b93 178 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 179 }
180
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_two; /* cookie, second word */
184 *p++ = xdr_two; /* entry len */
185 memcpy(p, "..\0\0", 4); /* entry */
186 p++;
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
4e769b93 190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 191
192 readdir->pgbase = (char *)p - (char *)start;
193 readdir->count -= readdir->pgbase;
194 kunmap_atomic(start, KM_USER0);
195}
196
26e976a8 197static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 198{
7539bbab 199 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 200 spin_lock(&clp->cl_lock);
201 if (time_before(clp->cl_last_renewal,timestamp))
202 clp->cl_last_renewal = timestamp;
203 spin_unlock(&clp->cl_lock);
204}
205
38478b24 206static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 207{
38478b24 208 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 209
38478b24 210 spin_lock(&dir->i_lock);
40d24704
TM		 211 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
212 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 213 nfs_force_lookup_revalidate(dir);
40d24704 214 nfsi->change_attr = cinfo->after;
38478b24 215 spin_unlock(&dir->i_lock);
1da177e4
LT		 216}
217
e56e0b78 218struct nfs4_opendata {
c6d00e63 219 struct kref kref;
e56e0b78
TM		 220 struct nfs_openargs o_arg;
221 struct nfs_openres o_res;
cdd4e68b
TM		 222 struct nfs_open_confirmargs c_arg;
223 struct nfs_open_confirmres c_res;
e56e0b78
TM		 224 struct nfs_fattr f_attr;
225 struct nfs_fattr dir_attr;
ad389da7 226 struct path path;
e56e0b78
TM		 227 struct dentry *dir;
228 struct nfs4_state_owner *owner;
aac00a8d 229 struct nfs4_state *state;
e56e0b78 230 struct iattr attrs;
26e976a8 231 unsigned long timestamp;
3e309914 232 unsigned int rpc_done : 1;
24ac23ab
TM		 233 int rpc_status;
234 int cancelled;
e56e0b78
TM		 235};
236
2ced46c2
TM		 237
238static void nfs4_init_opendata_res(struct nfs4_opendata *p)
239{
240 p->o_res.f_attr = &p->f_attr;
241 p->o_res.dir_attr = &p->dir_attr;
242 p->o_res.server = p->o_arg.server;
243 nfs_fattr_init(&p->f_attr);
244 nfs_fattr_init(&p->dir_attr);
245}
246
ad389da7 247static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
e56e0b78
TM		 248 struct nfs4_state_owner *sp, int flags,
249 const struct iattr *attrs)
250{
ad389da7 251 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 252 struct inode *dir = parent->d_inode;
253 struct nfs_server *server = NFS_SERVER(dir);
254 struct nfs4_opendata *p;
255
256 p = kzalloc(sizeof(*p), GFP_KERNEL);
257 if (p == NULL)
258 goto err;
259 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
260 if (p->o_arg.seqid == NULL)
261 goto err_free;
ad389da7
TM		 262 p->path.mnt = mntget(path->mnt);
263 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 264 p->dir = parent;
265 p->owner = sp;
266 atomic_inc(&sp->so_count);
267 p->o_arg.fh = NFS_FH(dir);
268 p->o_arg.open_flags = flags,
7539bbab 269 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 270 p->o_arg.id = sp->so_owner_id.id;
ad389da7 271 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 272 p->o_arg.server = server;
273 p->o_arg.bitmask = server->attr_bitmask;
274 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 275 if (flags & O_EXCL) {
276 u32 *s = (u32 *) p->o_arg.u.verifier.data;
277 s[0] = jiffies;
278 s[1] = current->pid;
279 } else if (flags & O_CREAT) {
280 p->o_arg.u.attrs = &p->attrs;
281 memcpy(&p->attrs, attrs, sizeof(p->attrs));
282 }
cdd4e68b
TM		 283 p->c_arg.fh = &p->o_res.fh;
284 p->c_arg.stateid = &p->o_res.stateid;
285 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 286 nfs4_init_opendata_res(p);
c6d00e63 287 kref_init(&p->kref);
e56e0b78
TM		 288 return p;
289err_free:
290 kfree(p);
291err:
292 dput(parent);
293 return NULL;
294}
295
c6d00e63 296static void nfs4_opendata_free(struct kref *kref)
e56e0b78 297{
c6d00e63
TM		 298 struct nfs4_opendata *p = container_of(kref,
299 struct nfs4_opendata, kref);
300
301 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 302 if (p->state != NULL)
303 nfs4_put_open_state(p->state);
c6d00e63
TM		 304 nfs4_put_state_owner(p->owner);
305 dput(p->dir);
306 dput(p->path.dentry);
307 mntput(p->path.mnt);
308 kfree(p);
309}
310
311static void nfs4_opendata_put(struct nfs4_opendata *p)
312{
313 if (p != NULL)
314 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 315}
316
06f814a3
TM		 317static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
318{
319 sigset_t oldset;
320 int ret;
321
322 rpc_clnt_sigmask(task->tk_client, &oldset);
323 ret = rpc_wait_for_completion_task(task);
324 rpc_clnt_sigunmask(task->tk_client, &oldset);
325 return ret;
326}
327
6ee41268
TM		 328static int can_open_cached(struct nfs4_state *state, int mode)
329{
330 int ret = 0;
331 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
332 case FMODE_READ:
333 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 334 break;
335 case FMODE_WRITE:
336 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 337 break;
338 case FMODE_READ|FMODE_WRITE:
339 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
340 }
341 return ret;
342}
343
aac00a8d
TM		 344static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
345{
346 if ((delegation->type & open_flags) != open_flags)
347 return 0;
348 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
349 return 0;
350 return 1;
351}
352
003707c7 353static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 354{
355 switch (open_flags) {
356 case FMODE_WRITE:
357 state->n_wronly++;
358 break;
359 case FMODE_READ:
360 state->n_rdonly++;
361 break;
362 case FMODE_READ|FMODE_WRITE:
363 state->n_rdwr++;
364 }
003707c7
TM		 365 nfs4_state_set_mode_locked(state, state->state | open_flags);
366}
367
368static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
369{
370 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
371 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
372 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
373 switch (open_flags) {
374 case FMODE_READ:
375 set_bit(NFS_O_RDONLY_STATE, &state->flags);
376 break;
377 case FMODE_WRITE:
378 set_bit(NFS_O_WRONLY_STATE, &state->flags);
379 break;
380 case FMODE_READ|FMODE_WRITE:
381 set_bit(NFS_O_RDWR_STATE, &state->flags);
382 }
e7616923
TM		 383}
384
003707c7
TM		 385static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
386{
8bda4e4c 387 write_seqlock(&state->seqlock);
003707c7 388 nfs_set_open_stateid_locked(state, stateid, open_flags);
8bda4e4c 389 write_sequnlock(&state->seqlock);
003707c7
TM		 390}
391
392static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
1da177e4 393{
1da177e4 394 open_flags &= (FMODE_READ|FMODE_WRITE);
8bda4e4c
TM		 395 /*
396 * Protect the call to nfs4_state_set_mode_locked and
397 * serialise the stateid update
398 */
399 write_seqlock(&state->seqlock);
003707c7
TM		 400 if (deleg_stateid != NULL) {
401 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
402 set_bit(NFS_DELEGATED_STATE, &state->flags);
403 }
404 if (open_stateid != NULL)
405 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
8bda4e4c
TM		 406 write_sequnlock(&state->seqlock);
407 spin_lock(&state->owner->so_lock);
e7616923 408 update_open_stateflags(state, open_flags);
ec073428 409 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 410}
411
aac00a8d
TM		 412static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
413{
414 struct nfs_delegation *delegation;
415
416 rcu_read_lock();
417 delegation = rcu_dereference(NFS_I(inode)->delegation);
418 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
419 rcu_read_unlock();
420 return;
421 }
422 rcu_read_unlock();
423 nfs_inode_return_delegation(inode);
424}
425
6ee41268 426static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 427{
428 struct nfs4_state *state = opendata->state;
429 struct nfs_inode *nfsi = NFS_I(state->inode);
430 struct nfs_delegation *delegation;
431 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
432 nfs4_stateid stateid;
433 int ret = -EAGAIN;
434
435 rcu_read_lock();
436 delegation = rcu_dereference(nfsi->delegation);
aac00a8d 437 for (;;) {
6ee41268
TM		 438 if (can_open_cached(state, open_mode)) {
439 spin_lock(&state->owner->so_lock);
440 if (can_open_cached(state, open_mode)) {
441 update_open_stateflags(state, open_mode);
442 spin_unlock(&state->owner->so_lock);
443 rcu_read_unlock();
444 goto out_return_state;
445 }
446 spin_unlock(&state->owner->so_lock);
447 }
448 if (delegation == NULL)
449 break;
aac00a8d
TM		 450 if (!can_open_delegated(delegation, open_mode))
451 break;
452 /* Save the delegation */
453 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
454 rcu_read_unlock();
455 lock_kernel();
af22f94a 456 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 457 unlock_kernel();
458 if (ret != 0)
459 goto out;
460 ret = -EAGAIN;
461 rcu_read_lock();
462 delegation = rcu_dereference(nfsi->delegation);
6ee41268 463 /* If no delegation, try a cached open */
aac00a8d 464 if (delegation == NULL)
6ee41268 465 continue;
aac00a8d
TM		 466 /* Is the delegation still valid? */
467 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
468 continue;
469 rcu_read_unlock();
470 update_open_stateid(state, NULL, &stateid, open_mode);
471 goto out_return_state;
472 }
aac00a8d
TM		 473 rcu_read_unlock();
474out:
475 return ERR_PTR(ret);
476out_return_state:
477 atomic_inc(&state->count);
478 return state;
479}
480
24ac23ab
TM		 481static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
482{
483 struct inode *inode;
484 struct nfs4_state *state = NULL;
003707c7
TM		 485 struct nfs_delegation *delegation;
486 nfs4_stateid *deleg_stateid = NULL;
1b370bc2 487 int ret;
24ac23ab 488
aac00a8d 489 if (!data->rpc_done) {
6ee41268 490 state = nfs4_try_open_cached(data);
aac00a8d
TM		 491 goto out;
492 }
493
1b370bc2 494 ret = -EAGAIN;
24ac23ab 495 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 496 goto err;
24ac23ab 497 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 498 ret = PTR_ERR(inode);
03f28e3a 499 if (IS_ERR(inode))
1b370bc2
TM		 500 goto err;
501 ret = -ENOMEM;
24ac23ab
TM		 502 state = nfs4_get_open_state(inode, data->owner);
503 if (state == NULL)
1b370bc2 504 goto err_put_inode;
549d6ed5 505 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 506 int delegation_flags = 0;
507
003707c7
TM		 508 rcu_read_lock();
509 delegation = rcu_dereference(NFS_I(inode)->delegation);
510 if (delegation)
511 delegation_flags = delegation->flags;
512 rcu_read_unlock();
549d6ed5
TM		 513 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
514 nfs_inode_set_delegation(state->inode,
515 data->owner->so_cred,
516 &data->o_res);
517 else
518 nfs_inode_reclaim_delegation(state->inode,
519 data->owner->so_cred,
520 &data->o_res);
521 }
003707c7
TM		 522 rcu_read_lock();
523 delegation = rcu_dereference(NFS_I(inode)->delegation);
524 if (delegation != NULL)
525 deleg_stateid = &delegation->stateid;
526 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
527 rcu_read_unlock();
24ac23ab 528 iput(inode);
aac00a8d 529out:
24ac23ab 530 return state;
1b370bc2
TM		 531err_put_inode:
532 iput(inode);
533err:
534 return ERR_PTR(ret);
24ac23ab
TM		 535}
536
864472e9
TM		 537static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
538{
539 struct nfs_inode *nfsi = NFS_I(state->inode);
540 struct nfs_open_context *ctx;
541
542 spin_lock(&state->inode->i_lock);
543 list_for_each_entry(ctx, &nfsi->open_files, list) {
544 if (ctx->state != state)
545 continue;
546 get_nfs_open_context(ctx);
547 spin_unlock(&state->inode->i_lock);
548 return ctx;
549 }
550 spin_unlock(&state->inode->i_lock);
551 return ERR_PTR(-ENOENT);
552}
553
6f220ed5
TM		 554static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
555{
556 struct nfs4_opendata *opendata;
557
558 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
559 if (opendata == NULL)
560 return ERR_PTR(-ENOMEM);
561 opendata->state = state;
562 atomic_inc(&state->count);
563 return opendata;
564}
565
2ced46c2 566static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 567{
2ced46c2 568 struct nfs4_state *newstate;
864472e9
TM		 569 int ret;
570
571 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 572 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
573 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
574 nfs4_init_opendata_res(opendata);
864472e9
TM		 575 ret = _nfs4_proc_open(opendata);
576 if (ret != 0)
577 return ret;
2ced46c2 578 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 579 if (IS_ERR(newstate))
580 return PTR_ERR(newstate);
581 nfs4_close_state(&opendata->path, newstate, openflags);
2ced46c2 582 *res = newstate;
864472e9
TM		 583 return 0;
584}
585
586static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
587{
864472e9 588 struct nfs4_state *newstate;
864472e9
TM		 589 int ret;
590
591 /* memory barrier prior to reading state->n_* */
2ced46c2 592 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 593 smp_rmb();
594 if (state->n_rdwr != 0) {
2ced46c2 595 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 596 if (ret != 0)
597 return ret;
2ced46c2
TM		 598 if (newstate != state)
599 return -ESTALE;
864472e9
TM		 600 }
601 if (state->n_wronly != 0) {
2ced46c2 602 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 603 if (ret != 0)
604 return ret;
2ced46c2
TM		 605 if (newstate != state)
606 return -ESTALE;
864472e9
TM		 607 }
608 if (state->n_rdonly != 0) {
2ced46c2 609 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 610 if (ret != 0)
611 return ret;
2ced46c2
TM		 612 if (newstate != state)
613 return -ESTALE;
864472e9 614 }
1ac7e2fd
TM		 615 /*
616 * We may have performed cached opens for all three recoveries.
617 * Check if we need to update the current stateid.
618 */
619 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
620 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 621 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 622 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
623 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 624 write_sequnlock(&state->seqlock);
1ac7e2fd 625 }
864472e9
TM		 626 return 0;
627}
628
1da177e4
LT		 629/*
630 * OPEN_RECLAIM:
631 * reclaim state on the server after a reboot.
1da177e4 632 */
539cd03a 633static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 634{
1ac7e2fd 635 struct nfs_delegation *delegation;
864472e9
TM		 636 struct nfs4_opendata *opendata;
637 int delegation_type = 0;
1da177e4
LT		 638 int status;
639
6f220ed5
TM		 640 opendata = nfs4_open_recoverdata_alloc(ctx, state);
641 if (IS_ERR(opendata))
642 return PTR_ERR(opendata);
864472e9
TM		 643 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
644 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 645 rcu_read_lock();
646 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
647 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
65bbf6bd 648 delegation_type = delegation->type;
1ac7e2fd 649 rcu_read_unlock();
864472e9
TM		 650 opendata->o_arg.u.delegation_type = delegation_type;
651 status = nfs4_open_recover(opendata, state);
c6d00e63 652 nfs4_opendata_put(opendata);
1da177e4
LT		 653 return status;
654}
655
539cd03a 656static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 657{
658 struct nfs_server *server = NFS_SERVER(state->inode);
659 struct nfs4_exception exception = { };
660 int err;
661 do {
539cd03a 662 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 663 if (err != -NFS4ERR_DELAY)
664 break;
665 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 666 } while (exception.retry);
667 return err;
668}
669
864472e9
TM		 670static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
671{
672 struct nfs_open_context *ctx;
673 int ret;
674
675 ctx = nfs4_state_find_open_context(state);
676 if (IS_ERR(ctx))
677 return PTR_ERR(ctx);
539cd03a 678 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 679 put_nfs_open_context(ctx);
680 return ret;
681}
682
13437e12 683static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 684{
e56e0b78 685 struct nfs4_opendata *opendata;
864472e9 686 int ret;
1da177e4 687
6f220ed5
TM		 688 opendata = nfs4_open_recoverdata_alloc(ctx, state);
689 if (IS_ERR(opendata))
690 return PTR_ERR(opendata);
e56e0b78 691 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 692 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 693 sizeof(opendata->o_arg.u.delegation.data));
864472e9 694 ret = nfs4_open_recover(opendata, state);
c6d00e63 695 nfs4_opendata_put(opendata);
864472e9 696 return ret;
1da177e4
LT		 697}
698
13437e12 699int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 700{
701 struct nfs4_exception exception = { };
539cd03a 702 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 703 int err;
704 do {
13437e12 705 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 706 switch (err) {
707 case 0:
708 return err;
709 case -NFS4ERR_STALE_CLIENTID:
710 case -NFS4ERR_STALE_STATEID:
711 case -NFS4ERR_EXPIRED:
712 /* Don't recall a delegation if it was lost */
7539bbab 713 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 714 return err;
715 }
716 err = nfs4_handle_exception(server, err, &exception);
717 } while (exception.retry);
718 return err;
719}
720
cdd4e68b
TM		 721static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
722{
723 struct nfs4_opendata *data = calldata;
724
725 data->rpc_status = task->tk_status;
726 if (RPC_ASSASSINATED(task))
727 return;
26e976a8 728 if (data->rpc_status == 0) {
cdd4e68b
TM		 729 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
730 sizeof(data->o_res.stateid.data));
bb22629e 731 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 732 renew_lease(data->o_res.server, data->timestamp);
3e309914 733 data->rpc_done = 1;
26e976a8 734 }
0f9f95e0 735 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
cdd4e68b
TM		 736}
737
738static void nfs4_open_confirm_release(void *calldata)
739{
740 struct nfs4_opendata *data = calldata;
741 struct nfs4_state *state = NULL;
742
743 /* If this request hasn't been cancelled, do nothing */
744 if (data->cancelled == 0)
745 goto out_free;
746 /* In case of error, no cleanup! */
3e309914 747 if (!data->rpc_done)
cdd4e68b 748 goto out_free;
cdd4e68b 749 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 750 if (!IS_ERR(state))
4a35bd41 751 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 752out_free:
c6d00e63 753 nfs4_opendata_put(data);
cdd4e68b
TM		 754}
755
756static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 757 .rpc_call_done = nfs4_open_confirm_done,
758 .rpc_release = nfs4_open_confirm_release,
759};
760
761/*
762 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
763 */
764static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
765{
766 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
767 struct rpc_task *task;
5138fde0
TM		 768 struct rpc_message msg = {
769 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
770 .rpc_argp = &data->c_arg,
771 .rpc_resp = &data->c_res,
772 .rpc_cred = data->owner->so_cred,
773 };
c970aa85
TM		 774 struct rpc_task_setup task_setup_data = {
775 .rpc_client = server->client,
5138fde0 776 .rpc_message = &msg,
c970aa85
TM		 777 .callback_ops = &nfs4_open_confirm_ops,
778 .callback_data = data,
779 .flags = RPC_TASK_ASYNC,
780 };
1da177e4
LT		 781 int status;
782
c6d00e63 783 kref_get(&data->kref);
3e309914
TM		 784 data->rpc_done = 0;
785 data->rpc_status = 0;
5138fde0 786 data->timestamp = jiffies;
c970aa85 787 task = rpc_run_task(&task_setup_data);
7a1218a2 788 if (IS_ERR(task))
cdd4e68b 789 return PTR_ERR(task);
cdd4e68b
TM		 790 status = nfs4_wait_for_completion_rpc_task(task);
791 if (status != 0) {
792 data->cancelled = 1;
793 smp_wmb();
794 } else
795 status = data->rpc_status;
e6b3c4db 796 rpc_put_task(task);
1da177e4
LT		 797 return status;
798}
799
24ac23ab 800static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 801{
24ac23ab
TM		 802 struct nfs4_opendata *data = calldata;
803 struct nfs4_state_owner *sp = data->owner;
5138fde0 804
24ac23ab
TM		 805 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
806 return;
aac00a8d
TM		 807 /*
808 * Check if we still need to send an OPEN call, or if we can use
809 * a delegation instead.
810 */
811 if (data->state != NULL) {
812 struct nfs_delegation *delegation;
813
6ee41268
TM		 814 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
815 goto out_no_action;
aac00a8d
TM		 816 rcu_read_lock();
817 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
818 if (delegation != NULL &&
819 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
820 rcu_read_unlock();
6ee41268 821 goto out_no_action;
aac00a8d
TM		 822 }
823 rcu_read_unlock();
824 }
24ac23ab 825 /* Update sequence id. */
9f958ab8 826 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 827 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 828 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 829 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 830 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
831 }
26e976a8 832 data->timestamp = jiffies;
5138fde0 833 rpc_call_start(task);
6ee41268
TM		 834 return;
835out_no_action:
836 task->tk_action = NULL;
837
24ac23ab 838}
1da177e4 839
24ac23ab
TM		 840static void nfs4_open_done(struct rpc_task *task, void *calldata)
841{
842 struct nfs4_opendata *data = calldata;
1da177e4 843
24ac23ab
TM		 844 data->rpc_status = task->tk_status;
845 if (RPC_ASSASSINATED(task))
846 return;
847 if (task->tk_status == 0) {
848 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 849 case S_IFREG:
850 break;
851 case S_IFLNK:
24ac23ab 852 data->rpc_status = -ELOOP;
6f926b5b
TM		 853 break;
854 case S_IFDIR:
24ac23ab 855 data->rpc_status = -EISDIR;
6f926b5b
TM		 856 break;
857 default:
24ac23ab 858 data->rpc_status = -ENOTDIR;
6f926b5b 859 }
26e976a8 860 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 861 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
862 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 863 }
24ac23ab 864 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
3e309914 865 data->rpc_done = 1;
24ac23ab 866}
6f926b5b 867
24ac23ab
TM		 868static void nfs4_open_release(void *calldata)
869{
870 struct nfs4_opendata *data = calldata;
871 struct nfs4_state *state = NULL;
872
873 /* If this request hasn't been cancelled, do nothing */
874 if (data->cancelled == 0)
875 goto out_free;
876 /* In case of error, no cleanup! */
3e309914 877 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 878 goto out_free;
879 /* In case we need an open_confirm, no cleanup! */
880 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
881 goto out_free;
24ac23ab 882 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 883 if (!IS_ERR(state))
4a35bd41 884 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 885out_free:
c6d00e63 886 nfs4_opendata_put(data);
24ac23ab
TM		 887}
888
889static const struct rpc_call_ops nfs4_open_ops = {
890 .rpc_call_prepare = nfs4_open_prepare,
891 .rpc_call_done = nfs4_open_done,
892 .rpc_release = nfs4_open_release,
893};
894
895/*
896 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
897 */
898static int _nfs4_proc_open(struct nfs4_opendata *data)
899{
900 struct inode *dir = data->dir->d_inode;
901 struct nfs_server *server = NFS_SERVER(dir);
902 struct nfs_openargs *o_arg = &data->o_arg;
903 struct nfs_openres *o_res = &data->o_res;
904 struct rpc_task *task;
5138fde0
TM		 905 struct rpc_message msg = {
906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
907 .rpc_argp = o_arg,
908 .rpc_resp = o_res,
909 .rpc_cred = data->owner->so_cred,
910 };
c970aa85
TM		 911 struct rpc_task_setup task_setup_data = {
912 .rpc_client = server->client,
5138fde0 913 .rpc_message = &msg,
c970aa85
TM		 914 .callback_ops = &nfs4_open_ops,
915 .callback_data = data,
916 .flags = RPC_TASK_ASYNC,
917 };
24ac23ab
TM		 918 int status;
919
c6d00e63 920 kref_get(&data->kref);
3e309914
TM		 921 data->rpc_done = 0;
922 data->rpc_status = 0;
2ced46c2 923 data->cancelled = 0;
c970aa85 924 task = rpc_run_task(&task_setup_data);
7a1218a2 925 if (IS_ERR(task))
24ac23ab 926 return PTR_ERR(task);
24ac23ab
TM		 927 status = nfs4_wait_for_completion_rpc_task(task);
928 if (status != 0) {
929 data->cancelled = 1;
930 smp_wmb();
931 } else
932 status = data->rpc_status;
e6b3c4db 933 rpc_put_task(task);
3e309914 934 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 935 return status;
936
9936781d
TM		 937 if (o_res->fh.size == 0)
938 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
939
56ae19f3
TM		 940 if (o_arg->open_flags & O_CREAT) {
941 update_changeattr(dir, &o_res->cinfo);
942 nfs_post_op_update_inode(dir, o_res->dir_attr);
943 } else
944 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 945 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 946 status = _nfs4_proc_open_confirm(data);
1da177e4 947 if (status != 0)
24ac23ab 948 return status;
1da177e4
LT		 949 }
950 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 951 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 952 return 0;
1da177e4
LT		 953}
954
10afec90 955static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 956{
7539bbab 957 struct nfs_client *clp = server->nfs_client;
6b30954e 958 int ret;
58d9714a 959
6b30954e
TM		 960 for (;;) {
961 ret = nfs4_wait_clnt_recover(server->client, clp);
962 if (ret != 0)
963 return ret;
964 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
965 break;
58d9714a 966 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 967 }
968 return 0;
58d9714a
TM		 969}
970
1da177e4
LT		 971/*
972 * OPEN_EXPIRED:
973 * reclaim state on the server after a network partition.
974 * Assumes caller holds the appropriate lock
975 */
539cd03a 976static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 977{
e56e0b78 978 struct nfs4_opendata *opendata;
864472e9 979 int ret;
1da177e4 980
6f220ed5
TM		 981 opendata = nfs4_open_recoverdata_alloc(ctx, state);
982 if (IS_ERR(opendata))
983 return PTR_ERR(opendata);
864472e9
TM		 984 ret = nfs4_open_recover(opendata, state);
985 if (ret == -ESTALE) {
986 /* Invalidate the state owner so we don't ever use it again */
539cd03a
TM		 987 nfs4_drop_state_owner(state->owner);
988 d_drop(ctx->path.dentry);
1da177e4 989 }
c6d00e63 990 nfs4_opendata_put(opendata);
864472e9 991 return ret;
1da177e4
LT		 992}
993
539cd03a 994static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 995{
539cd03a 996 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 997 struct nfs4_exception exception = { };
998 int err;
999
1000 do {
539cd03a 1001 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 1002 if (err == -NFS4ERR_DELAY)
1003 nfs4_handle_exception(server, err, &exception);
1004 } while (exception.retry);
1005 return err;
1006}
1007
1da177e4
LT		 1008static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1009{
1da177e4 1010 struct nfs_open_context *ctx;
864472e9 1011 int ret;
1da177e4 1012
864472e9
TM		 1013 ctx = nfs4_state_find_open_context(state);
1014 if (IS_ERR(ctx))
1015 return PTR_ERR(ctx);
539cd03a 1016 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1017 put_nfs_open_context(ctx);
1018 return ret;
1da177e4
LT		 1019}
1020
aa53ed54
JL		 1021/*
1022 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1023 * fields corresponding to attributes that were used to store the verifier.
1024 * Make sure we clobber those fields in the later setattr call
1025 */
1026static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1027{
1028 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1029 !(sattr->ia_valid & ATTR_ATIME_SET))
1030 sattr->ia_valid |= ATTR_ATIME;
1031
1032 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1033 !(sattr->ia_valid & ATTR_MTIME_SET))
1034 sattr->ia_valid |= ATTR_MTIME;
1035}
1036
1da177e4 1037/*
24ac23ab 1038 * Returns a referenced nfs4_state
1da177e4 1039 */
ad389da7 1040static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1041{
1042 struct nfs4_state_owner *sp;
1043 struct nfs4_state *state = NULL;
1044 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1045 struct nfs_client *clp = server->nfs_client;
e56e0b78 1046 struct nfs4_opendata *opendata;
aac00a8d 1047 int status;
1da177e4
LT		 1048
1049 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1050 status = -ENOMEM;
1051 if (!(sp = nfs4_get_state_owner(server, cred))) {
1052 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1053 goto out_err;
1054 }
58d9714a
TM		 1055 status = nfs4_recover_expired_lease(server);
1056 if (status != 0)
b4454fe1 1057 goto err_put_state_owner;
aac00a8d
TM		 1058 if (path->dentry->d_inode != NULL)
1059 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a
TM		 1060 down_read(&clp->cl_sem);
1061 status = -ENOMEM;
ad389da7 1062 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1063 if (opendata == NULL)
76723de0 1064 goto err_release_rwsem;
1da177e4 1065
aac00a8d
TM		 1066 if (path->dentry->d_inode != NULL)
1067 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1068
24ac23ab 1069 status = _nfs4_proc_open(opendata);
1da177e4 1070 if (status != 0)
c6d00e63 1071 goto err_opendata_put;
1da177e4 1072
aa53ed54
JL		 1073 if (opendata->o_arg.open_flags & O_EXCL)
1074 nfs4_exclusive_attrset(opendata, sattr);
1075
24ac23ab 1076 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1077 status = PTR_ERR(state);
1078 if (IS_ERR(state))
c6d00e63 1079 goto err_opendata_put;
c6d00e63 1080 nfs4_opendata_put(opendata);
1da177e4
LT		 1081 nfs4_put_state_owner(sp);
1082 up_read(&clp->cl_sem);
1083 *res = state;
1084 return 0;
c6d00e63
TM		 1085err_opendata_put:
1086 nfs4_opendata_put(opendata);
76723de0
TM		 1087err_release_rwsem:
1088 up_read(&clp->cl_sem);
e56e0b78
TM		 1089err_put_state_owner:
1090 nfs4_put_state_owner(sp);
1da177e4 1091out_err:
1da177e4
LT		 1092 *res = NULL;
1093 return status;
1094}
1095
1096
ad389da7 1097static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1098{
1099 struct nfs4_exception exception = { };
1100 struct nfs4_state *res;
1101 int status;
1102
1103 do {
ad389da7 1104 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1105 if (status == 0)
1106 break;
1107 /* NOTE: BAD_SEQID means the server and client disagree about the
1108 * book-keeping w.r.t. state-changing operations
1109 * (OPEN/CLOSE/LOCK/LOCKU...)
1110 * It is actually a sign of a bug on the client or on the server.
1111 *
1112 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1113 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1114 * have unhashed the old state_owner for us, and that we can
1115 * therefore safely retry using a new one. We should still warn
1116 * the user though...
1117 */
1118 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1119 printk(KERN_WARNING "NFS: v4 server %s "
1120 " returned a bad sequence-id error!\n",
1121 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1122 exception.retry = 1;
1123 continue;
1124 }
550f5747
TM		 1125 /*
1126 * BAD_STATEID on OPEN means that the server cancelled our
1127 * state before it received the OPEN_CONFIRM.
1128 * Recover by retrying the request as per the discussion
1129 * on Page 181 of RFC3530.
1130 */
1131 if (status == -NFS4ERR_BAD_STATEID) {
1132 exception.retry = 1;
1133 continue;
1134 }
aac00a8d
TM		 1135 if (status == -EAGAIN) {
1136 /* We must have found a delegation */
1137 exception.retry = 1;
1138 continue;
1139 }
1da177e4
LT		 1140 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1141 status, &exception));
1142 } while (exception.retry);
1143 return res;
1144}
1145
3e4f6290
TM		 1146static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1147 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1148{
3e4f6290 1149 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1150 struct nfs_setattrargs arg = {
3e4f6290 1151 .fh = NFS_FH(inode),
1da177e4
LT		 1152 .iap = sattr,
1153 .server = server,
1154 .bitmask = server->attr_bitmask,
1155 };
1156 struct nfs_setattrres res = {
1157 .fattr = fattr,
1158 .server = server,
1159 };
1160 struct rpc_message msg = {
1161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1162 .rpc_argp = &arg,
1163 .rpc_resp = &res,
1164 };
26e976a8 1165 unsigned long timestamp = jiffies;
65e4308d 1166 int status;
1da177e4 1167
0e574af1 1168 nfs_fattr_init(fattr);
1da177e4 1169
3e4f6290
TM		 1170 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1171 /* Use that stateid */
1172 } else if (state != NULL) {
1da177e4 1173 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1174 nfs4_copy_stateid(&arg.stateid, state, current->files);
1175 } else
1da177e4
LT		 1176 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1177
65e4308d 1178 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1179 if (status == 0 && state != NULL)
1180 renew_lease(server, timestamp);
65e4308d 1181 return status;
1da177e4
LT		 1182}
1183
3e4f6290
TM		 1184static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1185 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1186{
3e4f6290 1187 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1188 struct nfs4_exception exception = { };
1189 int err;
1190 do {
1191 err = nfs4_handle_exception(server,
3e4f6290 1192 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1193 &exception);
1194 } while (exception.retry);
1195 return err;
1196}
1197
1198struct nfs4_closedata {
4a35bd41 1199 struct path path;
1da177e4
LT		 1200 struct inode *inode;
1201 struct nfs4_state *state;
1202 struct nfs_closeargs arg;
1203 struct nfs_closeres res;
516a6af6 1204 struct nfs_fattr fattr;
26e976a8 1205 unsigned long timestamp;
1da177e4
LT		 1206};
1207
963d8fe5 1208static void nfs4_free_closedata(void *data)
9512135d 1209{
963d8fe5
TM		 1210 struct nfs4_closedata *calldata = data;
1211 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1212
1213 nfs4_put_open_state(calldata->state);
1214 nfs_free_seqid(calldata->arg.seqid);
9512135d 1215 nfs4_put_state_owner(sp);
4a35bd41
TM		 1216 dput(calldata->path.dentry);
1217 mntput(calldata->path.mnt);
9512135d
TM		 1218 kfree(calldata);
1219}
1220
963d8fe5 1221static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1222{
963d8fe5 1223 struct nfs4_closedata *calldata = data;
1da177e4 1224 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1225 struct nfs_server *server = NFS_SERVER(calldata->inode);
1226
4ce70ada
TM		 1227 if (RPC_ASSASSINATED(task))
1228 return;
1da177e4
LT		 1229 /* hmm. we are done with the inode, and in the process of freeing
1230 * the state_owner. we keep this around to process errors
1231 */
cee54fc9 1232 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1233 switch (task->tk_status) {
1234 case 0:
45328c35 1235 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1236 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1237 break;
1238 case -NFS4ERR_STALE_STATEID:
1239 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1240 break;
1241 default:
1242 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1243 rpc_restart_call(task);
1244 return;
1245 }
1246 }
516a6af6 1247 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1248}
1249
4ce70ada 1250static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1251{
4ce70ada 1252 struct nfs4_closedata *calldata = data;
9512135d 1253 struct nfs4_state *state = calldata->state;
003707c7 1254 int clear_rd, clear_wr, clear_rdwr;
9512135d 1255
963d8fe5 1256 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1257 return;
003707c7 1258
003707c7 1259 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1260 spin_lock(&state->owner->so_lock);
003707c7 1261 /* Calculate the change in open mode */
e7616923 1262 if (state->n_rdwr == 0) {
003707c7 1263 if (state->n_rdonly == 0) {
003707c7
TM		 1264 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1265 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1266 }
1267 if (state->n_wronly == 0) {
003707c7
TM		 1268 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1269 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1270 }
e7616923 1271 }
4cecb76f 1272 spin_unlock(&state->owner->so_lock);
003707c7 1273 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1274 /* Note: exit _without_ calling nfs4_close_done */
1275 task->tk_action = NULL;
9512135d
TM		 1276 return;
1277 }
516a6af6 1278 nfs_fattr_init(calldata->res.fattr);
45328c35 1279 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1280 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1281 calldata->arg.open_flags = FMODE_READ;
1282 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1283 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1284 calldata->arg.open_flags = FMODE_WRITE;
1285 }
26e976a8 1286 calldata->timestamp = jiffies;
5138fde0 1287 rpc_call_start(task);
1da177e4
LT		 1288}
1289
963d8fe5 1290static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1291 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1292 .rpc_call_done = nfs4_close_done,
1293 .rpc_release = nfs4_free_closedata,
1294};
1295
1da177e4
LT		 1296/*
1297 * It is possible for data to be read/written from a mem-mapped file
1298 * after the sys_close call (which hits the vfs layer as a flush).
1299 * This means that we can't safely call nfsv4 close on a file until
1300 * the inode is cleared. This in turn means that we are not good
1301 * NFSv4 citizens - we do not indicate to the server to update the file's
1302 * share state even when we are done with one of the three share
1303 * stateid's in the inode.
1304 *
1305 * NOTE: Caller must be holding the sp->so_owner semaphore!
1306 */
a49c3c77 1307int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1308{
4a35bd41 1309 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1310 struct nfs4_closedata *calldata;
b39e625b
TM		 1311 struct nfs4_state_owner *sp = state->owner;
1312 struct rpc_task *task;
5138fde0
TM		 1313 struct rpc_message msg = {
1314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1315 .rpc_cred = state->owner->so_cred,
1316 };
c970aa85
TM		 1317 struct rpc_task_setup task_setup_data = {
1318 .rpc_client = server->client,
5138fde0 1319 .rpc_message = &msg,
c970aa85
TM		 1320 .callback_ops = &nfs4_close_ops,
1321 .flags = RPC_TASK_ASYNC,
1322 };
9512135d 1323 int status = -ENOMEM;
1da177e4 1324
9512135d 1325 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1326 if (calldata == NULL)
9512135d 1327 goto out;
4a35bd41 1328 calldata->inode = state->inode;
1da177e4 1329 calldata->state = state;
4a35bd41 1330 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1331 calldata->arg.stateid = &state->open_stateid;
1da177e4 1332 /* Serialization for the sequence id */
cee54fc9 1333 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1334 if (calldata->arg.seqid == NULL)
1335 goto out_free_calldata;
516a6af6
TM		 1336 calldata->arg.bitmask = server->attr_bitmask;
1337 calldata->res.fattr = &calldata->fattr;
1338 calldata->res.server = server;
4a35bd41
TM		 1339 calldata->path.mnt = mntget(path->mnt);
1340 calldata->path.dentry = dget(path->dentry);
9512135d 1341
5138fde0
TM		 1342 msg.rpc_argp = &calldata->arg,
1343 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1344 task_setup_data.callback_data = calldata;
1345 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1346 if (IS_ERR(task))
1347 return PTR_ERR(task);
a49c3c77
TM		 1348 status = 0;
1349 if (wait)
1350 status = rpc_wait_for_completion_task(task);
b39e625b 1351 rpc_put_task(task);
a49c3c77 1352 return status;
9512135d
TM		 1353out_free_calldata:
1354 kfree(calldata);
1355out:
b39e625b
TM		 1356 nfs4_put_open_state(state);
1357 nfs4_put_state_owner(sp);
9512135d 1358 return status;
1da177e4
LT		 1359}
1360
4a35bd41 1361static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1362{
1363 struct file *filp;
1b45c46c 1364 int ret;
02a913a7 1365
1b45c46c
TM		 1366 /* If the open_intent is for execute, we have an extra check to make */
1367 if (nd->intent.open.flags & FMODE_EXEC) {
af22f94a 1368 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1369 state->owner->so_cred,
1370 nd->intent.open.flags);
1371 if (ret < 0)
1372 goto out_close;
1373 }
4a35bd41 1374 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1375 if (!IS_ERR(filp)) {
1376 struct nfs_open_context *ctx;
cd3758e3 1377 ctx = nfs_file_open_context(filp);
02a913a7 1378 ctx->state = state;
95cf959b
TM		 1379 return 0;
1380 }
1b45c46c
TM		 1381 ret = PTR_ERR(filp);
1382out_close:
a49c3c77 1383 nfs4_close_sync(path, state, nd->intent.open.flags);
1b45c46c 1384 return ret;
02a913a7
TM		 1385}
1386
1387struct dentry *
1da177e4
LT		 1388nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1389{
565277f6 1390 struct dentry *parent;
ad389da7
TM		 1391 struct path path = {
1392 .mnt = nd->mnt,
1393 .dentry = dentry,
1394 };
1da177e4
LT		 1395 struct iattr attr;
1396 struct rpc_cred *cred;
1397 struct nfs4_state *state;
02a913a7 1398 struct dentry *res;
1da177e4
LT		 1399
1400 if (nd->flags & LOOKUP_CREATE) {
1401 attr.ia_mode = nd->intent.open.create_mode;
1402 attr.ia_valid = ATTR_MODE;
1403 if (!IS_POSIXACL(dir))
1404 attr.ia_mode &= ~current->fs->umask;
1405 } else {
1406 attr.ia_valid = 0;
1407 BUG_ON(nd->intent.open.flags & O_CREAT);
1408 }
1409
1f163415 1410 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4 1411 if (IS_ERR(cred))
02a913a7 1412 return (struct dentry *)cred;
565277f6
TM		 1413 parent = dentry->d_parent;
1414 /* Protect against concurrent sillydeletes */
1415 nfs_block_sillyrename(parent);
ad389da7 1416 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1417 put_rpccred(cred);
02a913a7 1418 if (IS_ERR(state)) {
d75340cc 1419 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1420 d_add(dentry, NULL);
d75340cc
TM		 1421 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1422 }
565277f6 1423 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1424 return (struct dentry *)state;
1425 }
24ac23ab 1426 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1427 if (res != NULL)
deee9369 1428 path.dentry = res;
d75340cc 1429 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1430 nfs_unblock_sillyrename(parent);
4a35bd41 1431 nfs4_intent_set_file(nd, &path, state);
02a913a7 1432 return res;
1da177e4
LT		 1433}
1434
1435int
02a913a7 1436nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1437{
ad389da7
TM		 1438 struct path path = {
1439 .mnt = nd->mnt,
1440 .dentry = dentry,
1441 };
1da177e4
LT		 1442 struct rpc_cred *cred;
1443 struct nfs4_state *state;
1da177e4 1444
1f163415 1445 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1446 if (IS_ERR(cred))
1447 return PTR_ERR(cred);
aac00a8d 1448 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1449 put_rpccred(cred);
02a913a7
TM		 1450 if (IS_ERR(state)) {
1451 switch (PTR_ERR(state)) {
1452 case -EPERM:
1453 case -EACCES:
1454 case -EDQUOT:
1455 case -ENOSPC:
1456 case -EROFS:
1457 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1458 return 1;
b87c0adf
CL		 1459 default:
1460 goto out_drop;
02a913a7 1461 }
02a913a7 1462 }
24ac23ab 1463 if (state->inode == dentry->d_inode) {
d75340cc 1464 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
4a35bd41 1465 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1466 return 1;
1467 }
a49c3c77 1468 nfs4_close_sync(&path, state, openflags);
02a913a7
TM		 1469out_drop:
1470 d_drop(dentry);
1da177e4
LT		 1471 return 0;
1472}
1473
1474
1475static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1476{
1477 struct nfs4_server_caps_res res = {};
1478 struct rpc_message msg = {
1479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1480 .rpc_argp = fhandle,
1481 .rpc_resp = &res,
1482 };
1483 int status;
1484
1485 status = rpc_call_sync(server->client, &msg, 0);
1486 if (status == 0) {
1487 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1488 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1489 server->caps |= NFS_CAP_ACLS;
1490 if (res.has_links != 0)
1491 server->caps |= NFS_CAP_HARDLINKS;
1492 if (res.has_symlinks != 0)
1493 server->caps |= NFS_CAP_SYMLINKS;
1494 server->acl_bitmask = res.acl_bitmask;
1495 }
1496 return status;
1497}
1498
55a97593 1499int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1500{
1501 struct nfs4_exception exception = { };
1502 int err;
1503 do {
1504 err = nfs4_handle_exception(server,
1505 _nfs4_server_capabilities(server, fhandle),
1506 &exception);
1507 } while (exception.retry);
1508 return err;
1509}
1510
1511static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1512 struct nfs_fsinfo *info)
1513{
1da177e4
LT		 1514 struct nfs4_lookup_root_arg args = {
1515 .bitmask = nfs4_fattr_bitmap,
1516 };
1517 struct nfs4_lookup_res res = {
1518 .server = server,
0e574af1 1519 .fattr = info->fattr,
1da177e4
LT		 1520 .fh = fhandle,
1521 };
1522 struct rpc_message msg = {
1523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1524 .rpc_argp = &args,
1525 .rpc_resp = &res,
1526 };
0e574af1 1527 nfs_fattr_init(info->fattr);
1da177e4
LT		 1528 return rpc_call_sync(server->client, &msg, 0);
1529}
1530
1531static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1532 struct nfs_fsinfo *info)
1533{
1534 struct nfs4_exception exception = { };
1535 int err;
1536 do {
1537 err = nfs4_handle_exception(server,
1538 _nfs4_lookup_root(server, fhandle, info),
1539 &exception);
1540 } while (exception.retry);
1541 return err;
1542}
1543
54ceac45
DH		 1544/*
1545 * get the file handle for the "/" directory on the server
1546 */
1da177e4 1547static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1548 struct nfs_fsinfo *info)
1da177e4 1549{
1da177e4
LT		 1550 int status;
1551
1da177e4 1552 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1553 if (status == 0)
1554 status = nfs4_server_capabilities(server, fhandle);
1555 if (status == 0)
1556 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1557 return nfs4_map_errors(status);
1da177e4
LT		 1558}
1559
6b97fd3d
MN		 1560/*
1561 * Get locations and (maybe) other attributes of a referral.
1562 * Note that we'll actually follow the referral later when
1563 * we detect fsid mismatch in inode revalidation
1564 */
56659e99 1565static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1566{
1567 int status = -ENOMEM;
1568 struct page *page = NULL;
1569 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1570
1571 page = alloc_page(GFP_KERNEL);
1572 if (page == NULL)
1573 goto out;
1574 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1575 if (locations == NULL)
1576 goto out;
1577
c228fd3a 1578 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1579 if (status != 0)
1580 goto out;
1581 /* Make sure server returned a different fsid for the referral */
1582 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1583 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1584 status = -EIO;
1585 goto out;
1586 }
1587
1588 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1589 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1590 if (!fattr->mode)
1591 fattr->mode = S_IFDIR;
1592 memset(fhandle, 0, sizeof(struct nfs_fh));
1593out:
1594 if (page)
1595 __free_page(page);
1596 if (locations)
1597 kfree(locations);
1598 return status;
1599}
1600
1da177e4
LT		 1601static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1602{
1603 struct nfs4_getattr_arg args = {
1604 .fh = fhandle,
1605 .bitmask = server->attr_bitmask,
1606 };
1607 struct nfs4_getattr_res res = {
1608 .fattr = fattr,
1609 .server = server,
1610 };
1611 struct rpc_message msg = {
1612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1613 .rpc_argp = &args,
1614 .rpc_resp = &res,
1615 };
1616
0e574af1 1617 nfs_fattr_init(fattr);
1da177e4
LT		 1618 return rpc_call_sync(server->client, &msg, 0);
1619}
1620
1621static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1622{
1623 struct nfs4_exception exception = { };
1624 int err;
1625 do {
1626 err = nfs4_handle_exception(server,
1627 _nfs4_proc_getattr(server, fhandle, fattr),
1628 &exception);
1629 } while (exception.retry);
1630 return err;
1631}
1632
1633/*
1634 * The file is not closed if it is opened due to the a request to change
1635 * the size of the file. The open call will not be needed once the
1636 * VFS layer lookup-intents are implemented.
1637 *
1638 * Close is called when the inode is destroyed.
1639 * If we haven't opened the file for O_WRONLY, we
1640 * need to in the size_change case to obtain a stateid.
1641 *
1642 * Got race?
1643 * Because OPEN is always done by name in nfsv4, it is
1644 * possible that we opened a different file by the same
1645 * name. We can recognize this race condition, but we
1646 * can't do anything about it besides returning an error.
1647 *
1648 * This will be fixed with VFS changes (lookup-intent).
1649 */
1650static int
1651nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1652 struct iattr *sattr)
1653{
08e9eac4
TM		 1654 struct rpc_cred *cred;
1655 struct inode *inode = dentry->d_inode;
d530838b
TM		 1656 struct nfs_open_context *ctx;
1657 struct nfs4_state *state = NULL;
1da177e4
LT		 1658 int status;
1659
0e574af1 1660 nfs_fattr_init(fattr);
1da177e4 1661
1f163415 1662 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM		 1663 if (IS_ERR(cred))
1664 return PTR_ERR(cred);
d530838b
TM		 1665
1666 /* Search for an existing open(O_WRITE) file */
1667 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1668 if (ctx != NULL)
1669 state = ctx->state;
08e9eac4 1670
3e4f6290 1671 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1672 if (status == 0)
1673 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1674 if (ctx != NULL)
1675 put_nfs_open_context(ctx);
08e9eac4 1676 put_rpccred(cred);
1da177e4
LT		 1677 return status;
1678}
1679
56659e99
TM		 1680static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1681 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1682 struct nfs_fattr *fattr)
1683{
1684 int status;
1685 struct nfs4_lookup_arg args = {
1686 .bitmask = server->attr_bitmask,
1687 .dir_fh = dirfh,
1688 .name = name,
1689 };
1690 struct nfs4_lookup_res res = {
1691 .server = server,
1692 .fattr = fattr,
1693 .fh = fhandle,
1694 };
1695 struct rpc_message msg = {
1696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1697 .rpc_argp = &args,
1698 .rpc_resp = &res,
1699 };
1700
1701 nfs_fattr_init(fattr);
1702
1703 dprintk("NFS call lookupfh %s\n", name->name);
1704 status = rpc_call_sync(server->client, &msg, 0);
1705 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1706 return status;
1707}
1708
1709static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1710 struct qstr *name, struct nfs_fh *fhandle,
1711 struct nfs_fattr *fattr)
1712{
1713 struct nfs4_exception exception = { };
1714 int err;
1715 do {
4e56e082
TM		 1716 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1717 /* FIXME: !!!! */
1718 if (err == -NFS4ERR_MOVED) {
1719 err = -EREMOTE;
1720 break;
1721 }
1722 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1723 } while (exception.retry);
1724 return err;
1725}
1726
56659e99 1727static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1728 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1729{
4e56e082 1730 int status;
1da177e4
LT		 1731
1732 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1733 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1734 if (status == -NFS4ERR_MOVED)
1735 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1736 dprintk("NFS reply lookup: %d\n", status);
1737 return status;
1738}
1739
1740static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1741{
1742 struct nfs4_exception exception = { };
1743 int err;
1744 do {
1745 err = nfs4_handle_exception(NFS_SERVER(dir),
1746 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1747 &exception);
1748 } while (exception.retry);
1749 return err;
1750}
1751
1752static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1753{
76b32999
TM		 1754 struct nfs_server *server = NFS_SERVER(inode);
1755 struct nfs_fattr fattr;
1da177e4
LT		 1756 struct nfs4_accessargs args = {
1757 .fh = NFS_FH(inode),
76b32999
TM		 1758 .bitmask = server->attr_bitmask,
1759 };
1760 struct nfs4_accessres res = {
1761 .server = server,
1762 .fattr = &fattr,
1da177e4 1763 };
1da177e4
LT		 1764 struct rpc_message msg = {
1765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1766 .rpc_argp = &args,
1767 .rpc_resp = &res,
1768 .rpc_cred = entry->cred,
1769 };
1770 int mode = entry->mask;
1771 int status;
1772
1773 /*
1774 * Determine which access bits we want to ask for...
1775 */
1776 if (mode & MAY_READ)
1777 args.access |= NFS4_ACCESS_READ;
1778 if (S_ISDIR(inode->i_mode)) {
1779 if (mode & MAY_WRITE)
1780 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1781 if (mode & MAY_EXEC)
1782 args.access |= NFS4_ACCESS_LOOKUP;
1783 } else {
1784 if (mode & MAY_WRITE)
1785 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1786 if (mode & MAY_EXEC)
1787 args.access |= NFS4_ACCESS_EXECUTE;
1788 }
76b32999 1789 nfs_fattr_init(&fattr);
1da177e4
LT		 1790 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1791 if (!status) {
1792 entry->mask = 0;
1793 if (res.access & NFS4_ACCESS_READ)
1794 entry->mask |= MAY_READ;
1795 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1796 entry->mask |= MAY_WRITE;
1797 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1798 entry->mask |= MAY_EXEC;
76b32999 1799 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1800 }
1801 return status;
1802}
1803
1804static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1805{
1806 struct nfs4_exception exception = { };
1807 int err;
1808 do {
1809 err = nfs4_handle_exception(NFS_SERVER(inode),
1810 _nfs4_proc_access(inode, entry),
1811 &exception);
1812 } while (exception.retry);
1813 return err;
1814}
1815
1816/*
1817 * TODO: For the time being, we don't try to get any attributes
1818 * along with any of the zero-copy operations READ, READDIR,
1819 * READLINK, WRITE.
1820 *
1821 * In the case of the first three, we want to put the GETATTR
1822 * after the read-type operation -- this is because it is hard
1823 * to predict the length of a GETATTR response in v4, and thus
1824 * align the READ data correctly. This means that the GETATTR
1825 * may end up partially falling into the page cache, and we should
1826 * shift it into the 'tail' of the xdr_buf before processing.
1827 * To do this efficiently, we need to know the total length
1828 * of data received, which doesn't seem to be available outside
1829 * of the RPC layer.
1830 *
1831 * In the case of WRITE, we also want to put the GETATTR after
1832 * the operation -- in this case because we want to make sure
1833 * we get the post-operation mtime and size. This means that
1834 * we can't use xdr_encode_pages() as written: we need a variant
1835 * of it which would leave room in the 'tail' iovec.
1836 *
1837 * Both of these changes to the XDR layer would in fact be quite
1838 * minor, but I decided to leave them for a subsequent patch.
1839 */
1840static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1841 unsigned int pgbase, unsigned int pglen)
1842{
1843 struct nfs4_readlink args = {
1844 .fh = NFS_FH(inode),
1845 .pgbase = pgbase,
1846 .pglen = pglen,
1847 .pages = &page,
1848 };
1849 struct rpc_message msg = {
1850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1851 .rpc_argp = &args,
1852 .rpc_resp = NULL,
1853 };
1854
1855 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1856}
1857
1858static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1859 unsigned int pgbase, unsigned int pglen)
1860{
1861 struct nfs4_exception exception = { };
1862 int err;
1863 do {
1864 err = nfs4_handle_exception(NFS_SERVER(inode),
1865 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1866 &exception);
1867 } while (exception.retry);
1868 return err;
1869}
1870
1da177e4
LT		 1871/*
1872 * Got race?
1873 * We will need to arrange for the VFS layer to provide an atomic open.
1874 * Until then, this create/open method is prone to inefficiency and race
1875 * conditions due to the lookup, create, and open VFS calls from sys_open()
1876 * placed on the wire.
1877 *
1878 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1879 * The file will be opened again in the subsequent VFS open call
1880 * (nfs4_proc_file_open).
1881 *
1882 * The open for read will just hang around to be used by any process that
1883 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1884 */
1885
1886static int
1887nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1888 int flags, struct nameidata *nd)
1da177e4 1889{
ad389da7
TM		 1890 struct path path = {
1891 .mnt = nd->mnt,
1892 .dentry = dentry,
1893 };
1da177e4
LT		 1894 struct nfs4_state *state;
1895 struct rpc_cred *cred;
1896 int status = 0;
1897
1f163415 1898 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1899 if (IS_ERR(cred)) {
1900 status = PTR_ERR(cred);
1901 goto out;
1902 }
ad389da7 1903 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4 1904 put_rpccred(cred);
d4d9cdcb 1905 d_drop(dentry);
1da177e4
LT		 1906 if (IS_ERR(state)) {
1907 status = PTR_ERR(state);
1908 goto out;
1909 }
d4d9cdcb 1910 d_add(dentry, igrab(state->inode));
d75340cc 1911 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 1912 if (flags & O_EXCL) {
1913 struct nfs_fattr fattr;
3e4f6290 1914 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1915 if (status == 0)
65e4308d 1916 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1917 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1918 }
ad389da7 1919 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1920 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1921 else
a49c3c77 1922 nfs4_close_sync(&path, state, flags);
1da177e4
LT		 1923out:
1924 return status;
1925}
1926
1927static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1928{
16e42959 1929 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 1930 struct nfs_removeargs args = {
1da177e4 1931 .fh = NFS_FH(dir),
4fdc17b2
TM		 1932 .name.len = name->len,
1933 .name.name = name->name,
16e42959
TM		 1934 .bitmask = server->attr_bitmask,
1935 };
4fdc17b2 1936 struct nfs_removeres res = {
16e42959 1937 .server = server,
1da177e4 1938 };
1da177e4 1939 struct rpc_message msg = {
4fdc17b2
TM		 1940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1941 .rpc_argp = &args,
1942 .rpc_resp = &res,
1da177e4
LT		 1943 };
1944 int status;
1945
4fdc17b2 1946 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 1947 status = rpc_call_sync(server->client, &msg, 0);
1948 if (status == 0) {
1949 update_changeattr(dir, &res.cinfo);
4fdc17b2 1950 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 1951 }
1da177e4
LT		 1952 return status;
1953}
1954
1955static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1956{
1957 struct nfs4_exception exception = { };
1958 int err;
1959 do {
1960 err = nfs4_handle_exception(NFS_SERVER(dir),
1961 _nfs4_proc_remove(dir, name),
1962 &exception);
1963 } while (exception.retry);
1964 return err;
1965}
1966
e4eff1a6 1967static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 1968{
e4eff1a6
TM		 1969 struct nfs_server *server = NFS_SERVER(dir);
1970 struct nfs_removeargs *args = msg->rpc_argp;
1971 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 1972
e4eff1a6
TM		 1973 args->bitmask = server->attr_bitmask;
1974 res->server = server;
1da177e4 1975 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 1976}
1977
e4eff1a6 1978static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 1979{
e4eff1a6
TM		 1980 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1981
1982 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1983 return 0;
1984 update_changeattr(dir, &res->cinfo);
1985 nfs_post_op_update_inode(dir, &res->dir_attr);
1986 return 1;
1da177e4
LT		 1987}
1988
1989static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1990 struct inode *new_dir, struct qstr *new_name)
1991{
6caf2c82 1992 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1993 struct nfs4_rename_arg arg = {
1994 .old_dir = NFS_FH(old_dir),
1995 .new_dir = NFS_FH(new_dir),
1996 .old_name = old_name,
1997 .new_name = new_name,
6caf2c82
TM		 1998 .bitmask = server->attr_bitmask,
1999 };
2000 struct nfs_fattr old_fattr, new_fattr;
2001 struct nfs4_rename_res res = {
2002 .server = server,
2003 .old_fattr = &old_fattr,
2004 .new_fattr = &new_fattr,
1da177e4 2005 };
1da177e4
LT		 2006 struct rpc_message msg = {
2007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2008 .rpc_argp = &arg,
2009 .rpc_resp = &res,
2010 };
2011 int status;
2012
6caf2c82
TM		 2013 nfs_fattr_init(res.old_fattr);
2014 nfs_fattr_init(res.new_fattr);
2015 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2016
2017 if (!status) {
2018 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2019 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2020 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2021 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2022 }
2023 return status;
2024}
2025
2026static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2027 struct inode *new_dir, struct qstr *new_name)
2028{
2029 struct nfs4_exception exception = { };
2030 int err;
2031 do {
2032 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2033 _nfs4_proc_rename(old_dir, old_name,
2034 new_dir, new_name),
2035 &exception);
2036 } while (exception.retry);
2037 return err;
2038}
2039
2040static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2041{
91ba2eee 2042 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2043 struct nfs4_link_arg arg = {
2044 .fh = NFS_FH(inode),
2045 .dir_fh = NFS_FH(dir),
2046 .name = name,
91ba2eee
TM		 2047 .bitmask = server->attr_bitmask,
2048 };
2049 struct nfs_fattr fattr, dir_attr;
2050 struct nfs4_link_res res = {
2051 .server = server,
2052 .fattr = &fattr,
2053 .dir_attr = &dir_attr,
1da177e4 2054 };
1da177e4
LT		 2055 struct rpc_message msg = {
2056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2057 .rpc_argp = &arg,
91ba2eee 2058 .rpc_resp = &res,
1da177e4
LT		 2059 };
2060 int status;
2061
91ba2eee
TM		 2062 nfs_fattr_init(res.fattr);
2063 nfs_fattr_init(res.dir_attr);
2064 status = rpc_call_sync(server->client, &msg, 0);
2065 if (!status) {
2066 update_changeattr(dir, &res.cinfo);
2067 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2068 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2069 }
1da177e4
LT		 2070
2071 return status;
2072}
2073
2074static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2075{
2076 struct nfs4_exception exception = { };
2077 int err;
2078 do {
2079 err = nfs4_handle_exception(NFS_SERVER(inode),
2080 _nfs4_proc_link(inode, dir, name),
2081 &exception);
2082 } while (exception.retry);
2083 return err;
2084}
2085
4f390c15 2086static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2087 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2088{
2089 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2090 struct nfs_fh fhandle;
2091 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2092 struct nfs4_create_arg arg = {
2093 .dir_fh = NFS_FH(dir),
2094 .server = server,
4f390c15 2095 .name = &dentry->d_name,
1da177e4
LT		 2096 .attrs = sattr,
2097 .ftype = NF4LNK,
2098 .bitmask = server->attr_bitmask,
2099 };
2100 struct nfs4_create_res res = {
2101 .server = server,
4f390c15
CL		 2102 .fh = &fhandle,
2103 .fattr = &fattr,
56ae19f3 2104 .dir_fattr = &dir_fattr,
1da177e4
LT		 2105 };
2106 struct rpc_message msg = {
2107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2108 .rpc_argp = &arg,
2109 .rpc_resp = &res,
2110 };
2111 int status;
2112
94a6d753 2113 if (len > NFS4_MAXPATHLEN)
1da177e4 2114 return -ENAMETOOLONG;
4f390c15 2115
94a6d753
CL		 2116 arg.u.symlink.pages = &page;
2117 arg.u.symlink.len = len;
4f390c15 2118 nfs_fattr_init(&fattr);
56ae19f3 2119 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2120
2121 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2122 if (!status) {
1da177e4 2123 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2124 nfs_post_op_update_inode(dir, res.dir_fattr);
2125 status = nfs_instantiate(dentry, &fhandle, &fattr);
2126 }
1da177e4
LT		 2127 return status;
2128}
2129
4f390c15 2130static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2131 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2132{
2133 struct nfs4_exception exception = { };
2134 int err;
2135 do {
2136 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2137 _nfs4_proc_symlink(dir, dentry, page,
2138 len, sattr),
1da177e4
LT		 2139 &exception);
2140 } while (exception.retry);
2141 return err;
2142}
2143
2144static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2145 struct iattr *sattr)
2146{
2147 struct nfs_server *server = NFS_SERVER(dir);
2148 struct nfs_fh fhandle;
56ae19f3 2149 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2150 struct nfs4_create_arg arg = {
2151 .dir_fh = NFS_FH(dir),
2152 .server = server,
2153 .name = &dentry->d_name,
2154 .attrs = sattr,
2155 .ftype = NF4DIR,
2156 .bitmask = server->attr_bitmask,
2157 };
2158 struct nfs4_create_res res = {
2159 .server = server,
2160 .fh = &fhandle,
2161 .fattr = &fattr,
56ae19f3 2162 .dir_fattr = &dir_fattr,
1da177e4
LT		 2163 };
2164 struct rpc_message msg = {
2165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2166 .rpc_argp = &arg,
2167 .rpc_resp = &res,
2168 };
2169 int status;
2170
0e574af1 2171 nfs_fattr_init(&fattr);
56ae19f3 2172 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2173
2174 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2175 if (!status) {
2176 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2177 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2178 status = nfs_instantiate(dentry, &fhandle, &fattr);
2179 }
2180 return status;
2181}
2182
2183static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2184 struct iattr *sattr)
2185{
2186 struct nfs4_exception exception = { };
2187 int err;
2188 do {
2189 err = nfs4_handle_exception(NFS_SERVER(dir),
2190 _nfs4_proc_mkdir(dir, dentry, sattr),
2191 &exception);
2192 } while (exception.retry);
2193 return err;
2194}
2195
2196static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2197 u64 cookie, struct page *page, unsigned int count, int plus)
2198{
2199 struct inode *dir = dentry->d_inode;
2200 struct nfs4_readdir_arg args = {
2201 .fh = NFS_FH(dir),
2202 .pages = &page,
2203 .pgbase = 0,
2204 .count = count,
2205 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2206 };
2207 struct nfs4_readdir_res res;
2208 struct rpc_message msg = {
2209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2210 .rpc_argp = &args,
2211 .rpc_resp = &res,
2212 .rpc_cred = cred,
2213 };
2214 int status;
2215
eadf4598
TM		 2216 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2217 dentry->d_parent->d_name.name,
2218 dentry->d_name.name,
2219 (unsigned long long)cookie);
1da177e4
LT		 2220 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2221 res.pgbase = args.pgbase;
2222 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2223 if (status == 0)
2224 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2225
2226 nfs_invalidate_atime(dir);
2227
eadf4598 2228 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2229 return status;
2230}
2231
2232static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2233 u64 cookie, struct page *page, unsigned int count, int plus)
2234{
2235 struct nfs4_exception exception = { };
2236 int err;
2237 do {
2238 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2239 _nfs4_proc_readdir(dentry, cred, cookie,
2240 page, count, plus),
2241 &exception);
2242 } while (exception.retry);
2243 return err;
2244}
2245
2246static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2247 struct iattr *sattr, dev_t rdev)
2248{
2249 struct nfs_server *server = NFS_SERVER(dir);
2250 struct nfs_fh fh;
56ae19f3 2251 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2252 struct nfs4_create_arg arg = {
2253 .dir_fh = NFS_FH(dir),
2254 .server = server,
2255 .name = &dentry->d_name,
2256 .attrs = sattr,
2257 .bitmask = server->attr_bitmask,
2258 };
2259 struct nfs4_create_res res = {
2260 .server = server,
2261 .fh = &fh,
2262 .fattr = &fattr,
56ae19f3 2263 .dir_fattr = &dir_fattr,
1da177e4
LT		 2264 };
2265 struct rpc_message msg = {
2266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2267 .rpc_argp = &arg,
2268 .rpc_resp = &res,
2269 };
2270 int status;
2271 int mode = sattr->ia_mode;
2272
0e574af1 2273 nfs_fattr_init(&fattr);
56ae19f3 2274 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2275
2276 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2277 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2278 if (S_ISFIFO(mode))
2279 arg.ftype = NF4FIFO;
2280 else if (S_ISBLK(mode)) {
2281 arg.ftype = NF4BLK;
2282 arg.u.device.specdata1 = MAJOR(rdev);
2283 arg.u.device.specdata2 = MINOR(rdev);
2284 }
2285 else if (S_ISCHR(mode)) {
2286 arg.ftype = NF4CHR;
2287 arg.u.device.specdata1 = MAJOR(rdev);
2288 arg.u.device.specdata2 = MINOR(rdev);
2289 }
2290 else
2291 arg.ftype = NF4SOCK;
2292
2293 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2294 if (status == 0) {
2295 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2296 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2297 status = nfs_instantiate(dentry, &fh, &fattr);
2298 }
2299 return status;
2300}
2301
2302static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2303 struct iattr *sattr, dev_t rdev)
2304{
2305 struct nfs4_exception exception = { };
2306 int err;
2307 do {
2308 err = nfs4_handle_exception(NFS_SERVER(dir),
2309 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2310 &exception);
2311 } while (exception.retry);
2312 return err;
2313}
2314
2315static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2316 struct nfs_fsstat *fsstat)
2317{
2318 struct nfs4_statfs_arg args = {
2319 .fh = fhandle,
2320 .bitmask = server->attr_bitmask,
2321 };
2322 struct rpc_message msg = {
2323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2324 .rpc_argp = &args,
2325 .rpc_resp = fsstat,
2326 };
2327
0e574af1 2328 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2329 return rpc_call_sync(server->client, &msg, 0);
2330}
2331
2332static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2333{
2334 struct nfs4_exception exception = { };
2335 int err;
2336 do {
2337 err = nfs4_handle_exception(server,
2338 _nfs4_proc_statfs(server, fhandle, fsstat),
2339 &exception);
2340 } while (exception.retry);
2341 return err;
2342}
2343
2344static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2345 struct nfs_fsinfo *fsinfo)
2346{
2347 struct nfs4_fsinfo_arg args = {
2348 .fh = fhandle,
2349 .bitmask = server->attr_bitmask,
2350 };
2351 struct rpc_message msg = {
2352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2353 .rpc_argp = &args,
2354 .rpc_resp = fsinfo,
2355 };
2356
2357 return rpc_call_sync(server->client, &msg, 0);
2358}
2359
2360static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2361{
2362 struct nfs4_exception exception = { };
2363 int err;
2364
2365 do {
2366 err = nfs4_handle_exception(server,
2367 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2368 &exception);
2369 } while (exception.retry);
2370 return err;
2371}
2372
2373static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2374{
0e574af1 2375 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2376 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2377}
2378
2379static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2380 struct nfs_pathconf *pathconf)
2381{
2382 struct nfs4_pathconf_arg args = {
2383 .fh = fhandle,
2384 .bitmask = server->attr_bitmask,
2385 };
2386 struct rpc_message msg = {
2387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2388 .rpc_argp = &args,
2389 .rpc_resp = pathconf,
2390 };
2391
2392 /* None of the pathconf attributes are mandatory to implement */
2393 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2394 memset(pathconf, 0, sizeof(*pathconf));
2395 return 0;
2396 }
2397
0e574af1 2398 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2399 return rpc_call_sync(server->client, &msg, 0);
2400}
2401
2402static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2403 struct nfs_pathconf *pathconf)
2404{
2405 struct nfs4_exception exception = { };
2406 int err;
2407
2408 do {
2409 err = nfs4_handle_exception(server,
2410 _nfs4_proc_pathconf(server, fhandle, pathconf),
2411 &exception);
2412 } while (exception.retry);
2413 return err;
2414}
2415
ec06c096 2416static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2417{
ec06c096 2418 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2419
ec06c096 2420 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2421 rpc_restart_call(task);
ec06c096 2422 return -EAGAIN;
1da177e4 2423 }
8850df99
TM		 2424
2425 nfs_invalidate_atime(data->inode);
1da177e4 2426 if (task->tk_status > 0)
ec06c096
TM		 2427 renew_lease(server, data->timestamp);
2428 return 0;
1da177e4
LT		 2429}
2430
bdc7f021 2431static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2432{
1da177e4 2433 data->timestamp = jiffies;
bdc7f021 2434 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2435}
2436
788e7a89 2437static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2438{
1da177e4
LT		 2439 struct inode *inode = data->inode;
2440
2441 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2442 rpc_restart_call(task);
788e7a89 2443 return -EAGAIN;
1da177e4 2444 }
4f9838c7 2445 if (task->tk_status >= 0) {
1da177e4 2446 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2447 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2448 }
788e7a89 2449 return 0;
1da177e4
LT		 2450}
2451
bdc7f021 2452static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2453{
bdc7f021
TM		 2454 struct nfs_server *server = NFS_SERVER(data->inode);
2455
4f9838c7
TM		 2456 data->args.bitmask = server->attr_bitmask;
2457 data->res.server = server;
1da177e4
LT		 2458 data->timestamp = jiffies;
2459
bdc7f021 2460 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2461}
2462
788e7a89 2463static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2464{
1da177e4
LT		 2465 struct inode *inode = data->inode;
2466
2467 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2468 rpc_restart_call(task);
788e7a89 2469 return -EAGAIN;
1da177e4 2470 }
9e08a3c5 2471 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2472 return 0;
1da177e4
LT		 2473}
2474
bdc7f021 2475static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2476{
788e7a89 2477 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2478
4f9838c7
TM		 2479 data->args.bitmask = server->attr_bitmask;
2480 data->res.server = server;
bdc7f021 2481 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2482}
2483
2484/*
2485 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2486 * standalone procedure for queueing an asynchronous RENEW.
2487 */
963d8fe5 2488static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2489{
adfa6f98 2490 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2491 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2492
2493 if (task->tk_status < 0) {
2494 switch (task->tk_status) {
2495 case -NFS4ERR_STALE_CLIENTID:
2496 case -NFS4ERR_EXPIRED:
2497 case -NFS4ERR_CB_PATH_DOWN:
2498 nfs4_schedule_state_recovery(clp);
2499 }
2500 return;
2501 }
2502 spin_lock(&clp->cl_lock);
2503 if (time_before(clp->cl_last_renewal,timestamp))
2504 clp->cl_last_renewal = timestamp;
2505 spin_unlock(&clp->cl_lock);
2506}
2507
963d8fe5
TM		 2508static const struct rpc_call_ops nfs4_renew_ops = {
2509 .rpc_call_done = nfs4_renew_done,
2510};
2511
adfa6f98 2512int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2513{
2514 struct rpc_message msg = {
2515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2516 .rpc_argp = clp,
b4454fe1 2517 .rpc_cred = cred,
1da177e4
LT		 2518 };
2519
2520 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2521 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2522}
2523
adfa6f98 2524int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2525{
2526 struct rpc_message msg = {
2527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2528 .rpc_argp = clp,
b4454fe1 2529 .rpc_cred = cred,
1da177e4
LT		 2530 };
2531 unsigned long now = jiffies;
2532 int status;
2533
2534 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2535 if (status < 0)
2536 return status;
2537 spin_lock(&clp->cl_lock);
2538 if (time_before(clp->cl_last_renewal,now))
2539 clp->cl_last_renewal = now;
2540 spin_unlock(&clp->cl_lock);
2541 return 0;
2542}
2543
aa1870af
BF		 2544static inline int nfs4_server_supports_acls(struct nfs_server *server)
2545{
2546 return (server->caps & NFS_CAP_ACLS)
2547 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2548 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2549}
2550
2551/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2552 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2553 * the stack.
2554 */
2555#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2556
2557static void buf_to_pages(const void *buf, size_t buflen,
2558 struct page **pages, unsigned int *pgbase)
2559{
2560 const void *p = buf;
2561
2562 *pgbase = offset_in_page(buf);
2563 p -= *pgbase;
2564 while (p < buf + buflen) {
2565 *(pages++) = virt_to_page(p);
2566 p += PAGE_CACHE_SIZE;
2567 }
2568}
2569
e50a1c2e
BF		 2570struct nfs4_cached_acl {
2571 int cached;
2572 size_t len;
3e9d4154 2573 char data[0];
e50a1c2e
BF		 2574};
2575
2576static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2577{
2578 struct nfs_inode *nfsi = NFS_I(inode);
2579
2580 spin_lock(&inode->i_lock);
2581 kfree(nfsi->nfs4_acl);
2582 nfsi->nfs4_acl = acl;
2583 spin_unlock(&inode->i_lock);
2584}
2585
2586static void nfs4_zap_acl_attr(struct inode *inode)
2587{
2588 nfs4_set_cached_acl(inode, NULL);
2589}
2590
2591static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2592{
2593 struct nfs_inode *nfsi = NFS_I(inode);
2594 struct nfs4_cached_acl *acl;
2595 int ret = -ENOENT;
2596
2597 spin_lock(&inode->i_lock);
2598 acl = nfsi->nfs4_acl;
2599 if (acl == NULL)
2600 goto out;
2601 if (buf == NULL) /* user is just asking for length */
2602 goto out_len;
2603 if (acl->cached == 0)
2604 goto out;
2605 ret = -ERANGE; /* see getxattr(2) man page */
2606 if (acl->len > buflen)
2607 goto out;
2608 memcpy(buf, acl->data, acl->len);
2609out_len:
2610 ret = acl->len;
2611out:
2612 spin_unlock(&inode->i_lock);
2613 return ret;
2614}
2615
2616static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2617{
2618 struct nfs4_cached_acl *acl;
2619
2620 if (buf && acl_len <= PAGE_SIZE) {
2621 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2622 if (acl == NULL)
2623 goto out;
2624 acl->cached = 1;
2625 memcpy(acl->data, buf, acl_len);
2626 } else {
2627 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2628 if (acl == NULL)
2629 goto out;
2630 acl->cached = 0;
2631 }
2632 acl->len = acl_len;
2633out:
2634 nfs4_set_cached_acl(inode, acl);
2635}
2636
16b4289c 2637static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2638{
aa1870af
BF		 2639 struct page *pages[NFS4ACL_MAXPAGES];
2640 struct nfs_getaclargs args = {
2641 .fh = NFS_FH(inode),
2642 .acl_pages = pages,
2643 .acl_len = buflen,
2644 };
2645 size_t resp_len = buflen;
e50a1c2e 2646 void *resp_buf;
aa1870af
BF		 2647 struct rpc_message msg = {
2648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2649 .rpc_argp = &args,
2650 .rpc_resp = &resp_len,
2651 };
e50a1c2e 2652 struct page *localpage = NULL;
aa1870af
BF		 2653 int ret;
2654
e50a1c2e
BF		 2655 if (buflen < PAGE_SIZE) {
2656 /* As long as we're doing a round trip to the server anyway,
2657 * let's be prepared for a page of acl data. */
2658 localpage = alloc_page(GFP_KERNEL);
2659 resp_buf = page_address(localpage);
2660 if (localpage == NULL)
2661 return -ENOMEM;
2662 args.acl_pages[0] = localpage;
2663 args.acl_pgbase = 0;
1d95db8e 2664 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2665 } else {
2666 resp_buf = buf;
2667 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2668 }
aa1870af 2669 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2670 if (ret)
2671 goto out_free;
2672 if (resp_len > args.acl_len)
2673 nfs4_write_cached_acl(inode, NULL, resp_len);
2674 else
2675 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2676 if (buf) {
2677 ret = -ERANGE;
2678 if (resp_len > buflen)
2679 goto out_free;
2680 if (localpage)
2681 memcpy(buf, resp_buf, resp_len);
2682 }
2683 ret = resp_len;
2684out_free:
2685 if (localpage)
2686 __free_page(localpage);
aa1870af
BF		 2687 return ret;
2688}
2689
16b4289c
TM		 2690static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2691{
2692 struct nfs4_exception exception = { };
2693 ssize_t ret;
2694 do {
2695 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2696 if (ret >= 0)
2697 break;
2698 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2699 } while (exception.retry);
2700 return ret;
2701}
2702
e50a1c2e
BF		 2703static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2704{
2705 struct nfs_server *server = NFS_SERVER(inode);
2706 int ret;
2707
2708 if (!nfs4_server_supports_acls(server))
2709 return -EOPNOTSUPP;
2710 ret = nfs_revalidate_inode(server, inode);
2711 if (ret < 0)
2712 return ret;
2713 ret = nfs4_read_cached_acl(inode, buf, buflen);
2714 if (ret != -ENOENT)
2715 return ret;
2716 return nfs4_get_acl_uncached(inode, buf, buflen);
2717}
2718
16b4289c 2719static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2720{
2721 struct nfs_server *server = NFS_SERVER(inode);
2722 struct page *pages[NFS4ACL_MAXPAGES];
2723 struct nfs_setaclargs arg = {
2724 .fh = NFS_FH(inode),
2725 .acl_pages = pages,
2726 .acl_len = buflen,
2727 };
2728 struct rpc_message msg = {
2729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2730 .rpc_argp = &arg,
2731 .rpc_resp = NULL,
2732 };
2733 int ret;
2734
2735 if (!nfs4_server_supports_acls(server))
2736 return -EOPNOTSUPP;
642ac549 2737 nfs_inode_return_delegation(inode);
4b580ee3 2738 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2739 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2740 nfs_zap_caches(inode);
4b580ee3
BF		 2741 return ret;
2742}
2743
16b4289c
TM		 2744static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2745{
2746 struct nfs4_exception exception = { };
2747 int err;
2748 do {
2749 err = nfs4_handle_exception(NFS_SERVER(inode),
2750 __nfs4_proc_set_acl(inode, buf, buflen),
2751 &exception);
2752 } while (exception.retry);
2753 return err;
2754}
2755
1da177e4 2756static int
faf5f49c 2757nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2758{
7539bbab 2759 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2760
2761 if (!clp || task->tk_status >= 0)
2762 return 0;
2763 switch(task->tk_status) {
2764 case -NFS4ERR_STALE_CLIENTID:
2765 case -NFS4ERR_STALE_STATEID:
2766 case -NFS4ERR_EXPIRED:
2767 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2768 nfs4_schedule_state_recovery(clp);
433fbe4c 2769 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2770 rpc_wake_up_task(task);
2771 task->tk_status = 0;
2772 return -EAGAIN;
1da177e4 2773 case -NFS4ERR_DELAY:
006ea73e
CL		 2774 nfs_inc_server_stats((struct nfs_server *) server,
2775 NFSIOS_DELAY);
2776 case -NFS4ERR_GRACE:
1da177e4
LT		 2777 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2778 task->tk_status = 0;
2779 return -EAGAIN;
2780 case -NFS4ERR_OLD_STATEID:
2781 task->tk_status = 0;
2782 return -EAGAIN;
2783 }
2784 task->tk_status = nfs4_map_errors(task->tk_status);
2785 return 0;
2786}
2787
433fbe4c
TM		 2788static int nfs4_wait_bit_interruptible(void *word)
2789{
2790 if (signal_pending(current))
2791 return -ERESTARTSYS;
2792 schedule();
2793 return 0;
2794}
2795
adfa6f98 2796static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2797{
1da177e4 2798 sigset_t oldset;
433fbe4c 2799 int res;
1da177e4
LT		 2800
2801 might_sleep();
2802
e148582e
TM		 2803 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2804
1da177e4 2805 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2806 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2807 nfs4_wait_bit_interruptible,
2808 TASK_INTERRUPTIBLE);
1da177e4 2809 rpc_clnt_sigunmask(clnt, &oldset);
e148582e
TM		 2810
2811 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2812 return res;
2813}
2814
2815static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2816{
2817 sigset_t oldset;
2818 int res = 0;
2819
2820 might_sleep();
2821
2822 if (*timeout <= 0)
2823 *timeout = NFS4_POLL_RETRY_MIN;
2824 if (*timeout > NFS4_POLL_RETRY_MAX)
2825 *timeout = NFS4_POLL_RETRY_MAX;
2826 rpc_clnt_sigmask(clnt, &oldset);
2827 if (clnt->cl_intr) {
041e0e3b 2828 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2829 if (signalled())
2830 res = -ERESTARTSYS;
041e0e3b
NA		 2831 } else
2832 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2833 rpc_clnt_sigunmask(clnt, &oldset);
2834 *timeout <<= 1;
2835 return res;
2836}
2837
2838/* This is the error handling routine for processes that are allowed
2839 * to sleep.
2840 */
10afec90 2841static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2842{
7539bbab 2843 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2844 int ret = errorcode;
2845
2846 exception->retry = 0;
2847 switch(errorcode) {
2848 case 0:
2849 return 0;
2850 case -NFS4ERR_STALE_CLIENTID:
2851 case -NFS4ERR_STALE_STATEID:
2852 case -NFS4ERR_EXPIRED:
433fbe4c 2853 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2854 ret = nfs4_wait_clnt_recover(server->client, clp);
2855 if (ret == 0)
2856 exception->retry = 1;
2857 break;
c514983d 2858 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2859 case -NFS4ERR_GRACE:
2860 case -NFS4ERR_DELAY:
2861 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2862 if (ret != 0)
2863 break;
1da177e4 2864 case -NFS4ERR_OLD_STATEID:
2c56617d 2865 exception->retry = 1;
1da177e4
LT		 2866 }
2867 /* We failed to handle the error */
2868 return nfs4_map_errors(ret);
2869}
2870
adfa6f98 2871int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2872{
2873 nfs4_verifier sc_verifier;
2874 struct nfs4_setclientid setclientid = {
2875 .sc_verifier = &sc_verifier,
2876 .sc_prog = program,
2877 };
2878 struct rpc_message msg = {
2879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2880 .rpc_argp = &setclientid,
2881 .rpc_resp = clp,
286d7d6a 2882 .rpc_cred = cred,
1da177e4 2883 };
bc4785cd 2884 __be32 *p;
1da177e4
LT		 2885 int loop = 0;
2886 int status;
2887
bc4785cd 2888 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2889 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2890 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2891
2892 for(;;) {
2893 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2894 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
24c8dbbb 2895 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
286d7d6a 2896 cred->cr_ops->cr_name,
1da177e4
LT		 2897 clp->cl_id_uniquifier);
2898 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2899 sizeof(setclientid.sc_netid), "tcp");
2900 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2901 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2902 clp->cl_ipaddr, port >> 8, port & 255);
2903
2904 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2905 if (status != -NFS4ERR_CLID_INUSE)
2906 break;
2907 if (signalled())
2908 break;
2909 if (loop++ & 1)
2910 ssleep(clp->cl_lease_time + 1);
2911 else
2912 if (++clp->cl_id_uniquifier == 0)
2913 break;
2914 }
2915 return status;
2916}
2917
adfa6f98 2918static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2919{
2920 struct nfs_fsinfo fsinfo;
2921 struct rpc_message msg = {
2922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2923 .rpc_argp = clp,
2924 .rpc_resp = &fsinfo,
286d7d6a 2925 .rpc_cred = cred,
1da177e4
LT		 2926 };
2927 unsigned long now;
2928 int status;
2929
2930 now = jiffies;
2931 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2932 if (status == 0) {
2933 spin_lock(&clp->cl_lock);
2934 clp->cl_lease_time = fsinfo.lease_time * HZ;
2935 clp->cl_last_renewal = now;
58d9714a 2936 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2937 spin_unlock(&clp->cl_lock);
2938 }
2939 return status;
2940}
2941
adfa6f98 2942int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2943{
2944 long timeout;
2945 int err;
2946 do {
2947 err = _nfs4_proc_setclientid_confirm(clp, cred);
2948 switch (err) {
2949 case 0:
2950 return err;
2951 case -NFS4ERR_RESOURCE:
2952 /* The IBM lawyers misread another document! */
2953 case -NFS4ERR_DELAY:
2954 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2955 }
2956 } while (err == 0);
2957 return err;
2958}
2959
fe650407
TM		 2960struct nfs4_delegreturndata {
2961 struct nfs4_delegreturnargs args;
fa178f29 2962 struct nfs4_delegreturnres res;
fe650407
TM		 2963 struct nfs_fh fh;
2964 nfs4_stateid stateid;
26e976a8 2965 unsigned long timestamp;
fa178f29 2966 struct nfs_fattr fattr;
fe650407
TM		 2967 int rpc_status;
2968};
2969
fe650407
TM		 2970static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2971{
2972 struct nfs4_delegreturndata *data = calldata;
2973 data->rpc_status = task->tk_status;
26e976a8 2974 if (data->rpc_status == 0)
fa178f29 2975 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2976}
2977
2978static void nfs4_delegreturn_release(void *calldata)
2979{
fe650407
TM		 2980 kfree(calldata);
2981}
2982
c8d149f3 2983static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2984 .rpc_call_done = nfs4_delegreturn_done,
2985 .rpc_release = nfs4_delegreturn_release,
2986};
2987
2988static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2989{
2990 struct nfs4_delegreturndata *data;
fa178f29 2991 struct nfs_server *server = NFS_SERVER(inode);
fe650407 2992 struct rpc_task *task;
5138fde0
TM		 2993 struct rpc_message msg = {
2994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2995 .rpc_cred = cred,
2996 };
c970aa85
TM		 2997 struct rpc_task_setup task_setup_data = {
2998 .rpc_client = server->client,
5138fde0 2999 .rpc_message = &msg,
c970aa85
TM		 3000 .callback_ops = &nfs4_delegreturn_ops,
3001 .flags = RPC_TASK_ASYNC,
3002 };
fe650407
TM		 3003 int status;
3004
3005 data = kmalloc(sizeof(*data), GFP_KERNEL);
3006 if (data == NULL)
3007 return -ENOMEM;
3008 data->args.fhandle = &data->fh;
3009 data->args.stateid = &data->stateid;
fa178f29 3010 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3011 nfs_copy_fh(&data->fh, NFS_FH(inode));
3012 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3013 data->res.fattr = &data->fattr;
3014 data->res.server = server;
5138fde0 3015 nfs_fattr_init(data->res.fattr);
26e976a8 3016 data->timestamp = jiffies;
fe650407
TM		 3017 data->rpc_status = 0;
3018
c970aa85 3019 task_setup_data.callback_data = data;
5138fde0
TM		 3020 msg.rpc_argp = &data->args,
3021 msg.rpc_resp = &data->res,
c970aa85 3022 task = rpc_run_task(&task_setup_data);
7a1218a2 3023 if (IS_ERR(task))
fe650407 3024 return PTR_ERR(task);
fe650407 3025 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 3026 if (status == 0) {
fe650407 3027 status = data->rpc_status;
fa178f29 3028 if (status == 0)
9e08a3c5 3029 nfs_refresh_inode(inode, &data->fattr);
fa178f29 3030 }
e6b3c4db 3031 rpc_put_task(task);
fe650407 3032 return status;
1da177e4
LT		 3033}
3034
3035int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3036{
3037 struct nfs_server *server = NFS_SERVER(inode);
3038 struct nfs4_exception exception = { };
3039 int err;
3040 do {
3041 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3042 switch (err) {
3043 case -NFS4ERR_STALE_STATEID:
3044 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3045 case 0:
3046 return 0;
3047 }
3048 err = nfs4_handle_exception(server, err, &exception);
3049 } while (exception.retry);
3050 return err;
3051}
3052
3053#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3054#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3055
3056/*
3057 * sleep, with exponential backoff, and retry the LOCK operation.
3058 */
3059static unsigned long
3060nfs4_set_lock_task_retry(unsigned long timeout)
3061{
041e0e3b 3062 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3063 timeout <<= 1;
3064 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3065 return NFS4_LOCK_MAXTIMEOUT;
3066 return timeout;
3067}
3068
1da177e4
LT		 3069static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3070{
3071 struct inode *inode = state->inode;
3072 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3073 struct nfs_client *clp = server->nfs_client;
911d1aaf 3074 struct nfs_lockt_args arg = {
1da177e4 3075 .fh = NFS_FH(inode),
911d1aaf 3076 .fl = request,
1da177e4 3077 };
911d1aaf
TM		 3078 struct nfs_lockt_res res = {
3079 .denied = request,
1da177e4
LT		 3080 };
3081 struct rpc_message msg = {
3082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3083 .rpc_argp = &arg,
3084 .rpc_resp = &res,
3085 .rpc_cred = state->owner->so_cred,
3086 };
1da177e4
LT		 3087 struct nfs4_lock_state *lsp;
3088 int status;
3089
3090 down_read(&clp->cl_sem);
911d1aaf 3091 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3092 status = nfs4_set_lock_state(state, request);
3093 if (status != 0)
3094 goto out;
3095 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3096 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3097 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3098 switch (status) {
3099 case 0:
3100 request->fl_type = F_UNLCK;
3101 break;
3102 case -NFS4ERR_DENIED:
3103 status = 0;
1da177e4 3104 }
70cc6487 3105 request->fl_ops->fl_release_private(request);
8d0a8a9d 3106out:
1da177e4
LT		 3107 up_read(&clp->cl_sem);
3108 return status;
3109}
3110
3111static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3112{
3113 struct nfs4_exception exception = { };
3114 int err;
3115
3116 do {
3117 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3118 _nfs4_proc_getlk(state, cmd, request),
3119 &exception);
3120 } while (exception.retry);
3121 return err;
3122}
3123
3124static int do_vfs_lock(struct file *file, struct file_lock *fl)
3125{
3126 int res = 0;
3127 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3128 case FL_POSIX:
3129 res = posix_lock_file_wait(file, fl);
3130 break;
3131 case FL_FLOCK:
3132 res = flock_lock_file_wait(file, fl);
3133 break;
3134 default:
3135 BUG();
3136 }
1da177e4
LT		 3137 return res;
3138}
3139
faf5f49c 3140struct nfs4_unlockdata {
911d1aaf
TM		 3141 struct nfs_locku_args arg;
3142 struct nfs_locku_res res;
faf5f49c
TM		 3143 struct nfs4_lock_state *lsp;
3144 struct nfs_open_context *ctx;
911d1aaf
TM		 3145 struct file_lock fl;
3146 const struct nfs_server *server;
26e976a8 3147 unsigned long timestamp;
faf5f49c
TM		 3148};
3149
911d1aaf
TM		 3150static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3151 struct nfs_open_context *ctx,
3152 struct nfs4_lock_state *lsp,
3153 struct nfs_seqid *seqid)
3154{
3155 struct nfs4_unlockdata *p;
3156 struct inode *inode = lsp->ls_state->inode;
3157
3158 p = kmalloc(sizeof(*p), GFP_KERNEL);
3159 if (p == NULL)
3160 return NULL;
3161 p->arg.fh = NFS_FH(inode);
3162 p->arg.fl = &p->fl;
3163 p->arg.seqid = seqid;
3164 p->arg.stateid = &lsp->ls_stateid;
3165 p->lsp = lsp;
3166 atomic_inc(&lsp->ls_count);
3167 /* Ensure we don't close file until we're done freeing locks! */
3168 p->ctx = get_nfs_open_context(ctx);
3169 memcpy(&p->fl, fl, sizeof(p->fl));
3170 p->server = NFS_SERVER(inode);
3171 return p;
3172}
3173
06f814a3 3174static void nfs4_locku_release_calldata(void *data)
faf5f49c 3175{
963d8fe5 3176 struct nfs4_unlockdata *calldata = data;
911d1aaf 3177 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3178 nfs4_put_lock_state(calldata->lsp);
3179 put_nfs_open_context(calldata->ctx);
3180 kfree(calldata);
faf5f49c
TM		 3181}
3182
963d8fe5 3183static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3184{
963d8fe5 3185 struct nfs4_unlockdata *calldata = data;
faf5f49c 3186
06f814a3
TM		 3187 if (RPC_ASSASSINATED(task))
3188 return;
911d1aaf 3189 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3190 switch (task->tk_status) {
3191 case 0:
3192 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3193 calldata->res.stateid.data,
faf5f49c 3194 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3195 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3196 break;
3197 case -NFS4ERR_STALE_STATEID:
3198 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3199 break;
3200 default:
a6a352e9 3201 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3202 rpc_restart_call(task);
faf5f49c 3203 }
faf5f49c
TM		 3204}
3205
4ce70ada 3206static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3207{
4ce70ada 3208 struct nfs4_unlockdata *calldata = data;
faf5f49c 3209
911d1aaf 3210 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3211 return;
3212 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3213 /* Note: exit _without_ running nfs4_locku_done */
3214 task->tk_action = NULL;
faf5f49c
TM		 3215 return;
3216 }
26e976a8 3217 calldata->timestamp = jiffies;
5138fde0 3218 rpc_call_start(task);
faf5f49c
TM		 3219}
3220
963d8fe5 3221static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3222 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3223 .rpc_call_done = nfs4_locku_done,
06f814a3 3224 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3225};
3226
a5d16a4d
TM		 3227static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3228 struct nfs_open_context *ctx,
3229 struct nfs4_lock_state *lsp,
3230 struct nfs_seqid *seqid)
3231{
3232 struct nfs4_unlockdata *data;
5138fde0
TM		 3233 struct rpc_message msg = {
3234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3235 .rpc_cred = ctx->cred,
3236 };
c970aa85
TM		 3237 struct rpc_task_setup task_setup_data = {
3238 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3239 .rpc_message = &msg,
c970aa85
TM		 3240 .callback_ops = &nfs4_locku_ops,
3241 .flags = RPC_TASK_ASYNC,
3242 };
a5d16a4d 3243
137d6aca
FF		 3244 /* Ensure this is an unlock - when canceling a lock, the
3245 * canceled lock is passed in, and it won't be an unlock.
3246 */
3247 fl->fl_type = F_UNLCK;
3248
a5d16a4d
TM		 3249 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3250 if (data == NULL) {
3251 nfs_free_seqid(seqid);
3252 return ERR_PTR(-ENOMEM);
3253 }
3254
5138fde0
TM		 3255 msg.rpc_argp = &data->arg,
3256 msg.rpc_resp = &data->res,
c970aa85
TM		 3257 task_setup_data.callback_data = data;
3258 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3259}
3260
faf5f49c
TM		 3261static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3262{
911d1aaf 3263 struct nfs_seqid *seqid;
1da177e4 3264 struct nfs4_lock_state *lsp;
06f814a3
TM		 3265 struct rpc_task *task;
3266 int status = 0;
faf5f49c 3267
8d0a8a9d 3268 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3269 /* Unlock _before_ we do the RPC call */
3270 request->fl_flags |= FL_EXISTS;
3271 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3272 goto out;
8d0a8a9d 3273 if (status != 0)
9b073574
TM		 3274 goto out;
3275 /* Is this a delegated lock? */
3276 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3277 goto out;
8d0a8a9d 3278 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3279 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3280 status = -ENOMEM;
911d1aaf 3281 if (seqid == NULL)
9b073574 3282 goto out;
cd3758e3 3283 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3284 status = PTR_ERR(task);
3285 if (IS_ERR(task))
9b073574 3286 goto out;
a5d16a4d 3287 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3288 rpc_put_task(task);
9b073574 3289out:
1da177e4
LT		 3290 return status;
3291}
3292
a5d16a4d
TM		 3293struct nfs4_lockdata {
3294 struct nfs_lock_args arg;
3295 struct nfs_lock_res res;
3296 struct nfs4_lock_state *lsp;
3297 struct nfs_open_context *ctx;
3298 struct file_lock fl;
26e976a8 3299 unsigned long timestamp;
a5d16a4d
TM		 3300 int rpc_status;
3301 int cancelled;
3302};
3303
3304static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3305 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3306{
a5d16a4d
TM		 3307 struct nfs4_lockdata *p;
3308 struct inode *inode = lsp->ls_state->inode;
1da177e4 3309 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3310
3311 p = kzalloc(sizeof(*p), GFP_KERNEL);
3312 if (p == NULL)
3313 return NULL;
3314
3315 p->arg.fh = NFS_FH(inode);
3316 p->arg.fl = &p->fl;
2f74c0a0
TM		 3317 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3318 if (p->arg.open_seqid == NULL)
3319 goto out_free;
a5d16a4d
TM		 3320 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3321 if (p->arg.lock_seqid == NULL)
2f74c0a0 3322 goto out_free_seqid;
a5d16a4d 3323 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3324 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3325 p->arg.lock_owner.id = lsp->ls_id.id;
a5d16a4d
TM		 3326 p->lsp = lsp;
3327 atomic_inc(&lsp->ls_count);
3328 p->ctx = get_nfs_open_context(ctx);
3329 memcpy(&p->fl, fl, sizeof(p->fl));
3330 return p;
2f74c0a0
TM		 3331out_free_seqid:
3332 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3333out_free:
3334 kfree(p);
3335 return NULL;
3336}
3337
3338static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3339{
3340 struct nfs4_lockdata *data = calldata;
3341 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3342
a5d16a4d 3343 dprintk("%s: begin!\n", __FUNCTION__);
2f74c0a0
TM		 3344 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3345 return;
a5d16a4d
TM		 3346 /* Do we need to do an open_to_lock_owner? */
3347 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3348 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3349 return;
a5d16a4d
TM		 3350 data->arg.open_stateid = &state->stateid;
3351 data->arg.new_lock_owner = 1;
2f74c0a0
TM		 3352 } else
3353 data->arg.new_lock_owner = 0;
26e976a8 3354 data->timestamp = jiffies;
5138fde0 3355 rpc_call_start(task);
a5d16a4d
TM		 3356 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3357}
3358
3359static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3360{
3361 struct nfs4_lockdata *data = calldata;
3362
3363 dprintk("%s: begin!\n", __FUNCTION__);
3364
3365 data->rpc_status = task->tk_status;
3366 if (RPC_ASSASSINATED(task))
3367 goto out;
3368 if (data->arg.new_lock_owner != 0) {
3369 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3370 if (data->rpc_status == 0)
3371 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3372 else
3373 goto out;
3374 }
3375 if (data->rpc_status == 0) {
3376 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3377 sizeof(data->lsp->ls_stateid.data));
3378 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3379 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3380 }
3381 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3382out:
3383 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3384}
3385
3386static void nfs4_lock_release(void *calldata)
3387{
3388 struct nfs4_lockdata *data = calldata;
3389
3390 dprintk("%s: begin!\n", __FUNCTION__);
2f74c0a0 3391 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3392 if (data->cancelled != 0) {
3393 struct rpc_task *task;
3394 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3395 data->arg.lock_seqid);
3396 if (!IS_ERR(task))
e6b3c4db 3397 rpc_put_task(task);
a5d16a4d
TM		 3398 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3399 } else
3400 nfs_free_seqid(data->arg.lock_seqid);
3401 nfs4_put_lock_state(data->lsp);
3402 put_nfs_open_context(data->ctx);
3403 kfree(data);
3404 dprintk("%s: done!\n", __FUNCTION__);
3405}
3406
3407static const struct rpc_call_ops nfs4_lock_ops = {
3408 .rpc_call_prepare = nfs4_lock_prepare,
3409 .rpc_call_done = nfs4_lock_done,
3410 .rpc_release = nfs4_lock_release,
3411};
3412
3413static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3414{
3415 struct nfs4_lockdata *data;
3416 struct rpc_task *task;
5138fde0
TM		 3417 struct rpc_message msg = {
3418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3419 .rpc_cred = state->owner->so_cred,
3420 };
c970aa85
TM		 3421 struct rpc_task_setup task_setup_data = {
3422 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3423 .rpc_message = &msg,
c970aa85
TM		 3424 .callback_ops = &nfs4_lock_ops,
3425 .flags = RPC_TASK_ASYNC,
3426 };
a5d16a4d
TM		 3427 int ret;
3428
3429 dprintk("%s: begin!\n", __FUNCTION__);
cd3758e3 3430 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3431 fl->fl_u.nfs4_fl.owner);
3432 if (data == NULL)
3433 return -ENOMEM;
3434 if (IS_SETLKW(cmd))
3435 data->arg.block = 1;
3436 if (reclaim != 0)
3437 data->arg.reclaim = 1;
5138fde0
TM		 3438 msg.rpc_argp = &data->arg,
3439 msg.rpc_resp = &data->res,
c970aa85
TM		 3440 task_setup_data.callback_data = data;
3441 task = rpc_run_task(&task_setup_data);
7a1218a2 3442 if (IS_ERR(task))
a5d16a4d 3443 return PTR_ERR(task);
a5d16a4d
TM		 3444 ret = nfs4_wait_for_completion_rpc_task(task);
3445 if (ret == 0) {
3446 ret = data->rpc_status;
3447 if (ret == -NFS4ERR_DENIED)
3448 ret = -EAGAIN;
3449 } else
3450 data->cancelled = 1;
e6b3c4db 3451 rpc_put_task(task);
a5d16a4d
TM		 3452 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3453 return ret;
1da177e4
LT		 3454}
3455
3456static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3457{
202b50dc
TM		 3458 struct nfs_server *server = NFS_SERVER(state->inode);
3459 struct nfs4_exception exception = { };
3460 int err;
3461
3462 do {
42a2d13e
TM		 3463 /* Cache the lock if possible... */
3464 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3465 return 0;
202b50dc
TM		 3466 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3467 if (err != -NFS4ERR_DELAY)
3468 break;
3469 nfs4_handle_exception(server, err, &exception);
3470 } while (exception.retry);
3471 return err;
1da177e4
LT		 3472}
3473
3474static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3475{
202b50dc
TM		 3476 struct nfs_server *server = NFS_SERVER(state->inode);
3477 struct nfs4_exception exception = { };
3478 int err;
3479
6bfc93ef
TM		 3480 err = nfs4_set_lock_state(state, request);
3481 if (err != 0)
3482 return err;
202b50dc 3483 do {
42a2d13e
TM		 3484 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3485 return 0;
202b50dc
TM		 3486 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3487 if (err != -NFS4ERR_DELAY)
3488 break;
3489 nfs4_handle_exception(server, err, &exception);
3490 } while (exception.retry);
3491 return err;
1da177e4
LT		 3492}
3493
3494static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3495{
adfa6f98 3496 struct nfs_client *clp = state->owner->so_client;
01c3b861 3497 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3498 int status;
3499
6bfc93ef 3500 /* Is this a delegated open? */
6bfc93ef
TM		 3501 status = nfs4_set_lock_state(state, request);
3502 if (status != 0)
3503 goto out;
01c3b861
TM		 3504 request->fl_flags |= FL_ACCESS;
3505 status = do_vfs_lock(request->fl_file, request);
3506 if (status < 0)
3507 goto out;
3508 down_read(&clp->cl_sem);
3509 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3510 struct nfs_inode *nfsi = NFS_I(state->inode);
3511 /* Yes: cache locks! */
3512 down_read(&nfsi->rwsem);
3513 /* ...but avoid races with delegation recall... */
3514 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3515 request->fl_flags = fl_flags & ~FL_SLEEP;
3516 status = do_vfs_lock(request->fl_file, request);
3517 up_read(&nfsi->rwsem);
3518 goto out_unlock;
3519 }
3520 up_read(&nfsi->rwsem);
3521 }
6bfc93ef
TM		 3522 status = _nfs4_do_setlk(state, cmd, request, 0);
3523 if (status != 0)
01c3b861 3524 goto out_unlock;
6bfc93ef 3525 /* Note: we always want to sleep here! */
01c3b861 3526 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3527 if (do_vfs_lock(request->fl_file, request) < 0)
3528 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3529out_unlock:
1da177e4 3530 up_read(&clp->cl_sem);
01c3b861
TM		 3531out:
3532 request->fl_flags = fl_flags;
1da177e4
LT		 3533 return status;
3534}
3535
3536static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3537{
3538 struct nfs4_exception exception = { };
3539 int err;
3540
3541 do {
3542 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3543 _nfs4_proc_setlk(state, cmd, request),
3544 &exception);
3545 } while (exception.retry);
3546 return err;
3547}
3548
3549static int
3550nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3551{
3552 struct nfs_open_context *ctx;
3553 struct nfs4_state *state;
3554 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3555 int status;
3556
3557 /* verify open state */
cd3758e3 3558 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3559 state = ctx->state;
3560
3561 if (request->fl_start < 0 || request->fl_end < 0)
3562 return -EINVAL;
3563
3564 if (IS_GETLK(cmd))
3565 return nfs4_proc_getlk(state, F_GETLK, request);
3566
3567 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3568 return -EINVAL;
3569
3570 if (request->fl_type == F_UNLCK)
3571 return nfs4_proc_unlck(state, cmd, request);
3572
3573 do {
3574 status = nfs4_proc_setlk(state, cmd, request);
3575 if ((status != -EAGAIN) || IS_SETLK(cmd))
3576 break;
3577 timeout = nfs4_set_lock_task_retry(timeout);
3578 status = -ERESTARTSYS;
3579 if (signalled())
3580 break;
3581 } while(status < 0);
1da177e4
LT		 3582 return status;
3583}
3584
888e694c
TM		 3585int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3586{
3587 struct nfs_server *server = NFS_SERVER(state->inode);
3588 struct nfs4_exception exception = { };
3589 int err;
3590
3591 err = nfs4_set_lock_state(state, fl);
3592 if (err != 0)
3593 goto out;
3594 do {
3595 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3596 if (err != -NFS4ERR_DELAY)
3597 break;
3598 err = nfs4_handle_exception(server, err, &exception);
3599 } while (exception.retry);
3600out:
3601 return err;
3602}
6b3b5496 3603
aa1870af
BF		 3604#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3605
6b3b5496
BF		 3606int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3607 size_t buflen, int flags)
3608{
4b580ee3
BF		 3609 struct inode *inode = dentry->d_inode;
3610
3611 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3612 return -EOPNOTSUPP;
3613
3614 if (!S_ISREG(inode->i_mode) &&
3615 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3616 return -EPERM;
3617
3618 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3619}
3620
3621/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3622 * and that's what we'll do for e.g. user attributes that haven't been set.
3623 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3624 * attributes in kernel-managed attribute namespaces. */
3625ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3626 size_t buflen)
3627{
aa1870af
BF		 3628 struct inode *inode = dentry->d_inode;
3629
3630 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3631 return -EOPNOTSUPP;
3632
3633 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3634}
3635
3636ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3637{
aa1870af 3638 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3639
096455a2
BF		 3640 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3641 return 0;
6b3b5496
BF		 3642 if (buf && buflen < len)
3643 return -ERANGE;
3644 if (buf)
aa1870af
BF		 3645 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3646 return len;
6b3b5496
BF		 3647}
3648
56659e99 3649int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3650 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3651{
3652 struct nfs_server *server = NFS_SERVER(dir);
3653 u32 bitmask[2] = {
361e624f
MN		 3654 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3655 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3656 };
3657 struct nfs4_fs_locations_arg args = {
3658 .dir_fh = NFS_FH(dir),
c228fd3a 3659 .name = name,
683b57b4
TM		 3660 .page = page,
3661 .bitmask = bitmask,
3662 };
3663 struct rpc_message msg = {
3664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3665 .rpc_argp = &args,
7aaa0b3b 3666 .rpc_resp = fs_locations,
683b57b4
TM		 3667 };
3668 int status;
3669
3670 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3671 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3672 fs_locations->server = server;
830b8e33 3673 fs_locations->nlocations = 0;
683b57b4
TM		 3674 status = rpc_call_sync(server->client, &msg, 0);
3675 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3676 return status;
3677}
3678
1da177e4
LT		 3679struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3680 .recover_open = nfs4_open_reclaim,
3681 .recover_lock = nfs4_lock_reclaim,
3682};
3683
3684struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3685 .recover_open = nfs4_open_expired,
3686 .recover_lock = nfs4_lock_expired,
3687};
3688
92e1d5be 3689static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3690 .permission = nfs_permission,
3691 .getattr = nfs_getattr,
3692 .setattr = nfs_setattr,
3693 .getxattr = nfs4_getxattr,
3694 .setxattr = nfs4_setxattr,
3695 .listxattr = nfs4_listxattr,
3696};
3697
509de811 3698const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3699 .version = 4, /* protocol version */
3700 .dentry_ops = &nfs4_dentry_operations,
3701 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3702 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3703 .getroot = nfs4_proc_get_root,
3704 .getattr = nfs4_proc_getattr,
3705 .setattr = nfs4_proc_setattr,
2b3de441 3706 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3707 .lookup = nfs4_proc_lookup,
3708 .access = nfs4_proc_access,
3709 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3710 .create = nfs4_proc_create,
3711 .remove = nfs4_proc_remove,
3712 .unlink_setup = nfs4_proc_unlink_setup,
3713 .unlink_done = nfs4_proc_unlink_done,
3714 .rename = nfs4_proc_rename,
3715 .link = nfs4_proc_link,
3716 .symlink = nfs4_proc_symlink,
3717 .mkdir = nfs4_proc_mkdir,
3718 .rmdir = nfs4_proc_remove,
3719 .readdir = nfs4_proc_readdir,
3720 .mknod = nfs4_proc_mknod,
3721 .statfs = nfs4_proc_statfs,
3722 .fsinfo = nfs4_proc_fsinfo,
3723 .pathconf = nfs4_proc_pathconf,
e9326dca 3724 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3725 .decode_dirent = nfs4_decode_dirent,
3726 .read_setup = nfs4_proc_read_setup,
ec06c096 3727 .read_done = nfs4_read_done,
1da177e4 3728 .write_setup = nfs4_proc_write_setup,
788e7a89 3729 .write_done = nfs4_write_done,
1da177e4 3730 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3731 .commit_done = nfs4_commit_done,
02a913a7
TM		 3732 .file_open = nfs_open,
3733 .file_release = nfs_release,
1da177e4 3734 .lock = nfs4_proc_lock,
e50a1c2e 3735 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3736};
3737
3738/*
3739 * Local variables:
3740 * c-basic-offset: 8
3741 * End:
3742 */
kernel source for telekom puls (alcatel/mediatek)