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NFS: add newline to kernel warning message in auth_gss code
[linux-2.6-block.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)
213 nfsi->cache_change_attribute = jiffies;
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 721static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 722{
cdd4e68b
TM		 723 struct nfs4_opendata *data = calldata;
724 struct rpc_message msg = {
725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
726 .rpc_argp = &data->c_arg,
727 .rpc_resp = &data->c_res,
728 .rpc_cred = data->owner->so_cred,
1da177e4 729 };
26e976a8 730 data->timestamp = jiffies;
cdd4e68b
TM		 731 rpc_call_setup(task, &msg, 0);
732}
733
734static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
735{
736 struct nfs4_opendata *data = calldata;
737
738 data->rpc_status = task->tk_status;
739 if (RPC_ASSASSINATED(task))
740 return;
26e976a8 741 if (data->rpc_status == 0) {
cdd4e68b
TM		 742 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
743 sizeof(data->o_res.stateid.data));
26e976a8 744 renew_lease(data->o_res.server, data->timestamp);
3e309914 745 data->rpc_done = 1;
26e976a8 746 }
cdd4e68b 747 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
0f9f95e0 748 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
cdd4e68b
TM		 749}
750
751static void nfs4_open_confirm_release(void *calldata)
752{
753 struct nfs4_opendata *data = calldata;
754 struct nfs4_state *state = NULL;
755
756 /* If this request hasn't been cancelled, do nothing */
757 if (data->cancelled == 0)
758 goto out_free;
759 /* In case of error, no cleanup! */
3e309914 760 if (!data->rpc_done)
cdd4e68b
TM		 761 goto out_free;
762 nfs_confirm_seqid(&data->owner->so_seqid, 0);
763 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 764 if (!IS_ERR(state))
4a35bd41 765 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 766out_free:
c6d00e63 767 nfs4_opendata_put(data);
cdd4e68b
TM		 768}
769
770static const struct rpc_call_ops nfs4_open_confirm_ops = {
771 .rpc_call_prepare = nfs4_open_confirm_prepare,
772 .rpc_call_done = nfs4_open_confirm_done,
773 .rpc_release = nfs4_open_confirm_release,
774};
775
776/*
777 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
778 */
779static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
780{
781 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
782 struct rpc_task *task;
1da177e4
LT		 783 int status;
784
c6d00e63 785 kref_get(&data->kref);
3e309914
TM		 786 data->rpc_done = 0;
787 data->rpc_status = 0;
cdd4e68b 788 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
7a1218a2 789 if (IS_ERR(task))
cdd4e68b 790 return PTR_ERR(task);
cdd4e68b
TM		 791 status = nfs4_wait_for_completion_rpc_task(task);
792 if (status != 0) {
793 data->cancelled = 1;
794 smp_wmb();
795 } else
796 status = data->rpc_status;
e6b3c4db 797 rpc_put_task(task);
1da177e4
LT		 798 return status;
799}
800
24ac23ab 801static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 802{
24ac23ab
TM		 803 struct nfs4_opendata *data = calldata;
804 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 805 struct rpc_message msg = {
806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 807 .rpc_argp = &data->o_arg,
808 .rpc_resp = &data->o_res,
1da177e4
LT		 809 .rpc_cred = sp->so_cred,
810 };
24ac23ab
TM		 811
812 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
813 return;
aac00a8d
TM		 814 /*
815 * Check if we still need to send an OPEN call, or if we can use
816 * a delegation instead.
817 */
818 if (data->state != NULL) {
819 struct nfs_delegation *delegation;
820
6ee41268
TM		 821 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
822 goto out_no_action;
aac00a8d
TM		 823 rcu_read_lock();
824 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
825 if (delegation != NULL &&
826 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
827 rcu_read_unlock();
6ee41268 828 goto out_no_action;
aac00a8d
TM		 829 }
830 rcu_read_unlock();
831 }
24ac23ab 832 /* Update sequence id. */
9f958ab8 833 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 834 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 835 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
864472e9 836 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 837 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
838 }
26e976a8 839 data->timestamp = jiffies;
24ac23ab 840 rpc_call_setup(task, &msg, 0);
6ee41268
TM		 841 return;
842out_no_action:
843 task->tk_action = NULL;
844
24ac23ab 845}
1da177e4 846
24ac23ab
TM		 847static void nfs4_open_done(struct rpc_task *task, void *calldata)
848{
849 struct nfs4_opendata *data = calldata;
1da177e4 850
24ac23ab
TM		 851 data->rpc_status = task->tk_status;
852 if (RPC_ASSASSINATED(task))
853 return;
854 if (task->tk_status == 0) {
855 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 856 case S_IFREG:
857 break;
858 case S_IFLNK:
24ac23ab 859 data->rpc_status = -ELOOP;
6f926b5b
TM		 860 break;
861 case S_IFDIR:
24ac23ab 862 data->rpc_status = -EISDIR;
6f926b5b
TM		 863 break;
864 default:
24ac23ab 865 data->rpc_status = -ENOTDIR;
6f926b5b 866 }
26e976a8 867 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 868 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
869 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 870 }
24ac23ab 871 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
3e309914 872 data->rpc_done = 1;
24ac23ab 873}
6f926b5b 874
24ac23ab
TM		 875static void nfs4_open_release(void *calldata)
876{
877 struct nfs4_opendata *data = calldata;
878 struct nfs4_state *state = NULL;
879
880 /* If this request hasn't been cancelled, do nothing */
881 if (data->cancelled == 0)
882 goto out_free;
883 /* In case of error, no cleanup! */
3e309914 884 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 885 goto out_free;
886 /* In case we need an open_confirm, no cleanup! */
887 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
888 goto out_free;
889 nfs_confirm_seqid(&data->owner->so_seqid, 0);
890 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 891 if (!IS_ERR(state))
4a35bd41 892 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 893out_free:
c6d00e63 894 nfs4_opendata_put(data);
24ac23ab
TM		 895}
896
897static const struct rpc_call_ops nfs4_open_ops = {
898 .rpc_call_prepare = nfs4_open_prepare,
899 .rpc_call_done = nfs4_open_done,
900 .rpc_release = nfs4_open_release,
901};
902
903/*
904 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
905 */
906static int _nfs4_proc_open(struct nfs4_opendata *data)
907{
908 struct inode *dir = data->dir->d_inode;
909 struct nfs_server *server = NFS_SERVER(dir);
910 struct nfs_openargs *o_arg = &data->o_arg;
911 struct nfs_openres *o_res = &data->o_res;
912 struct rpc_task *task;
913 int status;
914
c6d00e63 915 kref_get(&data->kref);
3e309914
TM		 916 data->rpc_done = 0;
917 data->rpc_status = 0;
2ced46c2 918 data->cancelled = 0;
24ac23ab 919 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
7a1218a2 920 if (IS_ERR(task))
24ac23ab 921 return PTR_ERR(task);
24ac23ab
TM		 922 status = nfs4_wait_for_completion_rpc_task(task);
923 if (status != 0) {
924 data->cancelled = 1;
925 smp_wmb();
926 } else
927 status = data->rpc_status;
e6b3c4db 928 rpc_put_task(task);
3e309914 929 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 930 return status;
931
9936781d
TM		 932 if (o_res->fh.size == 0)
933 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
934
56ae19f3
TM		 935 if (o_arg->open_flags & O_CREAT) {
936 update_changeattr(dir, &o_res->cinfo);
937 nfs_post_op_update_inode(dir, o_res->dir_attr);
938 } else
939 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 940 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 941 status = _nfs4_proc_open_confirm(data);
1da177e4 942 if (status != 0)
24ac23ab 943 return status;
1da177e4
LT		 944 }
945 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 946 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 947 return 0;
1da177e4
LT		 948}
949
10afec90 950static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 951{
7539bbab 952 struct nfs_client *clp = server->nfs_client;
6b30954e 953 int ret;
58d9714a 954
6b30954e
TM		 955 for (;;) {
956 ret = nfs4_wait_clnt_recover(server->client, clp);
957 if (ret != 0)
958 return ret;
959 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
960 break;
58d9714a 961 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 962 }
963 return 0;
58d9714a
TM		 964}
965
1da177e4
LT		 966/*
967 * OPEN_EXPIRED:
968 * reclaim state on the server after a network partition.
969 * Assumes caller holds the appropriate lock
970 */
539cd03a 971static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 972{
e56e0b78 973 struct nfs4_opendata *opendata;
864472e9 974 int ret;
1da177e4 975
6f220ed5
TM		 976 opendata = nfs4_open_recoverdata_alloc(ctx, state);
977 if (IS_ERR(opendata))
978 return PTR_ERR(opendata);
864472e9
TM		 979 ret = nfs4_open_recover(opendata, state);
980 if (ret == -ESTALE) {
981 /* Invalidate the state owner so we don't ever use it again */
539cd03a
TM		 982 nfs4_drop_state_owner(state->owner);
983 d_drop(ctx->path.dentry);
1da177e4 984 }
c6d00e63 985 nfs4_opendata_put(opendata);
864472e9 986 return ret;
1da177e4
LT		 987}
988
539cd03a 989static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 990{
539cd03a 991 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 992 struct nfs4_exception exception = { };
993 int err;
994
995 do {
539cd03a 996 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 997 if (err == -NFS4ERR_DELAY)
998 nfs4_handle_exception(server, err, &exception);
999 } while (exception.retry);
1000 return err;
1001}
1002
1da177e4
LT		 1003static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1004{
1da177e4 1005 struct nfs_open_context *ctx;
864472e9 1006 int ret;
1da177e4 1007
864472e9
TM		 1008 ctx = nfs4_state_find_open_context(state);
1009 if (IS_ERR(ctx))
1010 return PTR_ERR(ctx);
539cd03a 1011 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1012 put_nfs_open_context(ctx);
1013 return ret;
1da177e4
LT		 1014}
1015
aa53ed54
JL		 1016/*
1017 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1018 * fields corresponding to attributes that were used to store the verifier.
1019 * Make sure we clobber those fields in the later setattr call
1020 */
1021static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1022{
1023 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1024 !(sattr->ia_valid & ATTR_ATIME_SET))
1025 sattr->ia_valid |= ATTR_ATIME;
1026
1027 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1028 !(sattr->ia_valid & ATTR_MTIME_SET))
1029 sattr->ia_valid |= ATTR_MTIME;
1030}
1031
1da177e4 1032/*
24ac23ab 1033 * Returns a referenced nfs4_state
1da177e4 1034 */
ad389da7 1035static 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		 1036{
1037 struct nfs4_state_owner *sp;
1038 struct nfs4_state *state = NULL;
1039 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1040 struct nfs_client *clp = server->nfs_client;
e56e0b78 1041 struct nfs4_opendata *opendata;
aac00a8d 1042 int status;
1da177e4
LT		 1043
1044 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1045 status = -ENOMEM;
1046 if (!(sp = nfs4_get_state_owner(server, cred))) {
1047 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1048 goto out_err;
1049 }
58d9714a
TM		 1050 status = nfs4_recover_expired_lease(server);
1051 if (status != 0)
b4454fe1 1052 goto err_put_state_owner;
aac00a8d
TM		 1053 if (path->dentry->d_inode != NULL)
1054 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a
TM		 1055 down_read(&clp->cl_sem);
1056 status = -ENOMEM;
ad389da7 1057 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1058 if (opendata == NULL)
76723de0 1059 goto err_release_rwsem;
1da177e4 1060
aac00a8d
TM		 1061 if (path->dentry->d_inode != NULL)
1062 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1063
24ac23ab 1064 status = _nfs4_proc_open(opendata);
1da177e4 1065 if (status != 0)
c6d00e63 1066 goto err_opendata_put;
1da177e4 1067
aa53ed54
JL		 1068 if (opendata->o_arg.open_flags & O_EXCL)
1069 nfs4_exclusive_attrset(opendata, sattr);
1070
24ac23ab 1071 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1072 status = PTR_ERR(state);
1073 if (IS_ERR(state))
c6d00e63 1074 goto err_opendata_put;
c6d00e63 1075 nfs4_opendata_put(opendata);
1da177e4
LT		 1076 nfs4_put_state_owner(sp);
1077 up_read(&clp->cl_sem);
1078 *res = state;
1079 return 0;
c6d00e63
TM		 1080err_opendata_put:
1081 nfs4_opendata_put(opendata);
76723de0
TM		 1082err_release_rwsem:
1083 up_read(&clp->cl_sem);
e56e0b78
TM		 1084err_put_state_owner:
1085 nfs4_put_state_owner(sp);
1da177e4 1086out_err:
1da177e4
LT		 1087 *res = NULL;
1088 return status;
1089}
1090
1091
ad389da7 1092static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1093{
1094 struct nfs4_exception exception = { };
1095 struct nfs4_state *res;
1096 int status;
1097
1098 do {
ad389da7 1099 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1100 if (status == 0)
1101 break;
1102 /* NOTE: BAD_SEQID means the server and client disagree about the
1103 * book-keeping w.r.t. state-changing operations
1104 * (OPEN/CLOSE/LOCK/LOCKU...)
1105 * It is actually a sign of a bug on the client or on the server.
1106 *
1107 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1108 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1109 * have unhashed the old state_owner for us, and that we can
1110 * therefore safely retry using a new one. We should still warn
1111 * the user though...
1112 */
1113 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1114 printk(KERN_WARNING "NFS: v4 server %s "
1115 " returned a bad sequence-id error!\n",
1116 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1117 exception.retry = 1;
1118 continue;
1119 }
550f5747
TM		 1120 /*
1121 * BAD_STATEID on OPEN means that the server cancelled our
1122 * state before it received the OPEN_CONFIRM.
1123 * Recover by retrying the request as per the discussion
1124 * on Page 181 of RFC3530.
1125 */
1126 if (status == -NFS4ERR_BAD_STATEID) {
1127 exception.retry = 1;
1128 continue;
1129 }
aac00a8d
TM		 1130 if (status == -EAGAIN) {
1131 /* We must have found a delegation */
1132 exception.retry = 1;
1133 continue;
1134 }
1da177e4
LT		 1135 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1136 status, &exception));
1137 } while (exception.retry);
1138 return res;
1139}
1140
3e4f6290
TM		 1141static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1142 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1143{
3e4f6290 1144 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1145 struct nfs_setattrargs arg = {
3e4f6290 1146 .fh = NFS_FH(inode),
1da177e4
LT		 1147 .iap = sattr,
1148 .server = server,
1149 .bitmask = server->attr_bitmask,
1150 };
1151 struct nfs_setattrres res = {
1152 .fattr = fattr,
1153 .server = server,
1154 };
1155 struct rpc_message msg = {
1156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1157 .rpc_argp = &arg,
1158 .rpc_resp = &res,
1159 };
26e976a8 1160 unsigned long timestamp = jiffies;
65e4308d 1161 int status;
1da177e4 1162
0e574af1 1163 nfs_fattr_init(fattr);
1da177e4 1164
3e4f6290
TM		 1165 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1166 /* Use that stateid */
1167 } else if (state != NULL) {
1da177e4 1168 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1169 nfs4_copy_stateid(&arg.stateid, state, current->files);
1170 } else
1da177e4
LT		 1171 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1172
65e4308d 1173 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1174 if (status == 0 && state != NULL)
1175 renew_lease(server, timestamp);
65e4308d 1176 return status;
1da177e4
LT		 1177}
1178
3e4f6290
TM		 1179static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1180 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1181{
3e4f6290 1182 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1183 struct nfs4_exception exception = { };
1184 int err;
1185 do {
1186 err = nfs4_handle_exception(server,
3e4f6290 1187 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1188 &exception);
1189 } while (exception.retry);
1190 return err;
1191}
1192
1193struct nfs4_closedata {
4a35bd41 1194 struct path path;
1da177e4
LT		 1195 struct inode *inode;
1196 struct nfs4_state *state;
1197 struct nfs_closeargs arg;
1198 struct nfs_closeres res;
516a6af6 1199 struct nfs_fattr fattr;
26e976a8 1200 unsigned long timestamp;
1da177e4
LT		 1201};
1202
963d8fe5 1203static void nfs4_free_closedata(void *data)
9512135d 1204{
963d8fe5
TM		 1205 struct nfs4_closedata *calldata = data;
1206 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1207
1208 nfs4_put_open_state(calldata->state);
1209 nfs_free_seqid(calldata->arg.seqid);
9512135d 1210 nfs4_put_state_owner(sp);
4a35bd41
TM		 1211 dput(calldata->path.dentry);
1212 mntput(calldata->path.mnt);
9512135d
TM		 1213 kfree(calldata);
1214}
1215
963d8fe5 1216static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1217{
963d8fe5 1218 struct nfs4_closedata *calldata = data;
1da177e4 1219 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1220 struct nfs_server *server = NFS_SERVER(calldata->inode);
1221
4ce70ada
TM		 1222 if (RPC_ASSASSINATED(task))
1223 return;
1da177e4
LT		 1224 /* hmm. we are done with the inode, and in the process of freeing
1225 * the state_owner. we keep this around to process errors
1226 */
cee54fc9 1227 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1228 switch (task->tk_status) {
1229 case 0:
45328c35 1230 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1231 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1232 break;
1233 case -NFS4ERR_STALE_STATEID:
1234 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1235 break;
1236 default:
1237 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1238 rpc_restart_call(task);
1239 return;
1240 }
1241 }
516a6af6 1242 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1243}
1244
4ce70ada 1245static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1246{
4ce70ada 1247 struct nfs4_closedata *calldata = data;
9512135d 1248 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1249 struct rpc_message msg = {
1250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1251 .rpc_argp = &calldata->arg,
1252 .rpc_resp = &calldata->res,
9512135d 1253 .rpc_cred = state->owner->so_cred,
1da177e4 1254 };
003707c7 1255 int clear_rd, clear_wr, clear_rdwr;
9512135d 1256
963d8fe5 1257 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1258 return;
003707c7 1259
003707c7 1260 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1261 spin_lock(&state->owner->so_lock);
003707c7 1262 /* Calculate the change in open mode */
e7616923 1263 if (state->n_rdwr == 0) {
003707c7 1264 if (state->n_rdonly == 0) {
003707c7
TM		 1265 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1266 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1267 }
1268 if (state->n_wronly == 0) {
003707c7
TM		 1269 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1270 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1271 }
e7616923 1272 }
4cecb76f 1273 spin_unlock(&state->owner->so_lock);
003707c7 1274 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1275 /* Note: exit _without_ calling nfs4_close_done */
1276 task->tk_action = NULL;
9512135d
TM		 1277 return;
1278 }
516a6af6 1279 nfs_fattr_init(calldata->res.fattr);
45328c35 1280 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1da177e4 1281 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1282 calldata->arg.open_flags = FMODE_READ;
1283 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1284 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1285 calldata->arg.open_flags = FMODE_WRITE;
1286 }
26e976a8 1287 calldata->timestamp = jiffies;
9512135d 1288 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1289}
1290
963d8fe5 1291static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1292 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1293 .rpc_call_done = nfs4_close_done,
1294 .rpc_release = nfs4_free_closedata,
1295};
1296
1da177e4
LT		 1297/*
1298 * It is possible for data to be read/written from a mem-mapped file
1299 * after the sys_close call (which hits the vfs layer as a flush).
1300 * This means that we can't safely call nfsv4 close on a file until
1301 * the inode is cleared. This in turn means that we are not good
1302 * NFSv4 citizens - we do not indicate to the server to update the file's
1303 * share state even when we are done with one of the three share
1304 * stateid's in the inode.
1305 *
1306 * NOTE: Caller must be holding the sp->so_owner semaphore!
1307 */
a49c3c77 1308int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1309{
4a35bd41 1310 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1311 struct nfs4_closedata *calldata;
b39e625b
TM		 1312 struct nfs4_state_owner *sp = state->owner;
1313 struct rpc_task *task;
9512135d 1314 int status = -ENOMEM;
1da177e4 1315
9512135d 1316 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1317 if (calldata == NULL)
9512135d 1318 goto out;
4a35bd41 1319 calldata->inode = state->inode;
1da177e4 1320 calldata->state = state;
4a35bd41 1321 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1322 calldata->arg.stateid = &state->open_stateid;
1da177e4 1323 /* Serialization for the sequence id */
cee54fc9 1324 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1325 if (calldata->arg.seqid == NULL)
1326 goto out_free_calldata;
516a6af6
TM		 1327 calldata->arg.bitmask = server->attr_bitmask;
1328 calldata->res.fattr = &calldata->fattr;
1329 calldata->res.server = server;
4a35bd41
TM		 1330 calldata->path.mnt = mntget(path->mnt);
1331 calldata->path.dentry = dget(path->dentry);
9512135d 1332
b39e625b
TM		 1333 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1334 if (IS_ERR(task))
1335 return PTR_ERR(task);
a49c3c77
TM		 1336 status = 0;
1337 if (wait)
1338 status = rpc_wait_for_completion_task(task);
b39e625b 1339 rpc_put_task(task);
a49c3c77 1340 return status;
9512135d
TM		 1341out_free_calldata:
1342 kfree(calldata);
1343out:
b39e625b
TM		 1344 nfs4_put_open_state(state);
1345 nfs4_put_state_owner(sp);
9512135d 1346 return status;
1da177e4
LT		 1347}
1348
4a35bd41 1349static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1350{
1351 struct file *filp;
1b45c46c 1352 int ret;
02a913a7 1353
1b45c46c
TM		 1354 /* If the open_intent is for execute, we have an extra check to make */
1355 if (nd->intent.open.flags & FMODE_EXEC) {
af22f94a 1356 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1357 state->owner->so_cred,
1358 nd->intent.open.flags);
1359 if (ret < 0)
1360 goto out_close;
1361 }
4a35bd41 1362 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1363 if (!IS_ERR(filp)) {
1364 struct nfs_open_context *ctx;
cd3758e3 1365 ctx = nfs_file_open_context(filp);
02a913a7 1366 ctx->state = state;
95cf959b
TM		 1367 return 0;
1368 }
1b45c46c
TM		 1369 ret = PTR_ERR(filp);
1370out_close:
a49c3c77 1371 nfs4_close_sync(path, state, nd->intent.open.flags);
1b45c46c 1372 return ret;
02a913a7
TM		 1373}
1374
1375struct dentry *
1da177e4
LT		 1376nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1377{
565277f6 1378 struct dentry *parent;
ad389da7
TM		 1379 struct path path = {
1380 .mnt = nd->mnt,
1381 .dentry = dentry,
1382 };
1da177e4
LT		 1383 struct iattr attr;
1384 struct rpc_cred *cred;
1385 struct nfs4_state *state;
02a913a7 1386 struct dentry *res;
1da177e4
LT		 1387
1388 if (nd->flags & LOOKUP_CREATE) {
1389 attr.ia_mode = nd->intent.open.create_mode;
1390 attr.ia_valid = ATTR_MODE;
1391 if (!IS_POSIXACL(dir))
1392 attr.ia_mode &= ~current->fs->umask;
1393 } else {
1394 attr.ia_valid = 0;
1395 BUG_ON(nd->intent.open.flags & O_CREAT);
1396 }
1397
1f163415 1398 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4 1399 if (IS_ERR(cred))
02a913a7 1400 return (struct dentry *)cred;
565277f6
TM		 1401 parent = dentry->d_parent;
1402 /* Protect against concurrent sillydeletes */
1403 nfs_block_sillyrename(parent);
ad389da7 1404 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1405 put_rpccred(cred);
02a913a7 1406 if (IS_ERR(state)) {
d75340cc 1407 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1408 d_add(dentry, NULL);
d75340cc
TM		 1409 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1410 }
565277f6 1411 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1412 return (struct dentry *)state;
1413 }
24ac23ab 1414 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1415 if (res != NULL)
deee9369 1416 path.dentry = res;
d75340cc 1417 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1418 nfs_unblock_sillyrename(parent);
4a35bd41 1419 nfs4_intent_set_file(nd, &path, state);
02a913a7 1420 return res;
1da177e4
LT		 1421}
1422
1423int
02a913a7 1424nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1425{
ad389da7
TM		 1426 struct path path = {
1427 .mnt = nd->mnt,
1428 .dentry = dentry,
1429 };
1da177e4
LT		 1430 struct rpc_cred *cred;
1431 struct nfs4_state *state;
1da177e4 1432
1f163415 1433 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1434 if (IS_ERR(cred))
1435 return PTR_ERR(cred);
aac00a8d 1436 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1437 put_rpccred(cred);
02a913a7
TM		 1438 if (IS_ERR(state)) {
1439 switch (PTR_ERR(state)) {
1440 case -EPERM:
1441 case -EACCES:
1442 case -EDQUOT:
1443 case -ENOSPC:
1444 case -EROFS:
1445 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1446 return 1;
b87c0adf
CL		 1447 default:
1448 goto out_drop;
02a913a7 1449 }
02a913a7 1450 }
24ac23ab 1451 if (state->inode == dentry->d_inode) {
d75340cc 1452 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
4a35bd41 1453 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1454 return 1;
1455 }
a49c3c77 1456 nfs4_close_sync(&path, state, openflags);
02a913a7
TM		 1457out_drop:
1458 d_drop(dentry);
1da177e4
LT		 1459 return 0;
1460}
1461
1462
1463static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1464{
1465 struct nfs4_server_caps_res res = {};
1466 struct rpc_message msg = {
1467 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1468 .rpc_argp = fhandle,
1469 .rpc_resp = &res,
1470 };
1471 int status;
1472
1473 status = rpc_call_sync(server->client, &msg, 0);
1474 if (status == 0) {
1475 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1476 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1477 server->caps |= NFS_CAP_ACLS;
1478 if (res.has_links != 0)
1479 server->caps |= NFS_CAP_HARDLINKS;
1480 if (res.has_symlinks != 0)
1481 server->caps |= NFS_CAP_SYMLINKS;
1482 server->acl_bitmask = res.acl_bitmask;
1483 }
1484 return status;
1485}
1486
55a97593 1487int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1488{
1489 struct nfs4_exception exception = { };
1490 int err;
1491 do {
1492 err = nfs4_handle_exception(server,
1493 _nfs4_server_capabilities(server, fhandle),
1494 &exception);
1495 } while (exception.retry);
1496 return err;
1497}
1498
1499static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1500 struct nfs_fsinfo *info)
1501{
1da177e4
LT		 1502 struct nfs4_lookup_root_arg args = {
1503 .bitmask = nfs4_fattr_bitmap,
1504 };
1505 struct nfs4_lookup_res res = {
1506 .server = server,
0e574af1 1507 .fattr = info->fattr,
1da177e4
LT		 1508 .fh = fhandle,
1509 };
1510 struct rpc_message msg = {
1511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1512 .rpc_argp = &args,
1513 .rpc_resp = &res,
1514 };
0e574af1 1515 nfs_fattr_init(info->fattr);
1da177e4
LT		 1516 return rpc_call_sync(server->client, &msg, 0);
1517}
1518
1519static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1520 struct nfs_fsinfo *info)
1521{
1522 struct nfs4_exception exception = { };
1523 int err;
1524 do {
1525 err = nfs4_handle_exception(server,
1526 _nfs4_lookup_root(server, fhandle, info),
1527 &exception);
1528 } while (exception.retry);
1529 return err;
1530}
1531
54ceac45
DH		 1532/*
1533 * get the file handle for the "/" directory on the server
1534 */
1da177e4 1535static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1536 struct nfs_fsinfo *info)
1da177e4 1537{
1da177e4
LT		 1538 int status;
1539
1da177e4 1540 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1541 if (status == 0)
1542 status = nfs4_server_capabilities(server, fhandle);
1543 if (status == 0)
1544 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1545 return nfs4_map_errors(status);
1da177e4
LT		 1546}
1547
6b97fd3d
MN		 1548/*
1549 * Get locations and (maybe) other attributes of a referral.
1550 * Note that we'll actually follow the referral later when
1551 * we detect fsid mismatch in inode revalidation
1552 */
56659e99 1553static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1554{
1555 int status = -ENOMEM;
1556 struct page *page = NULL;
1557 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1558
1559 page = alloc_page(GFP_KERNEL);
1560 if (page == NULL)
1561 goto out;
1562 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1563 if (locations == NULL)
1564 goto out;
1565
c228fd3a 1566 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1567 if (status != 0)
1568 goto out;
1569 /* Make sure server returned a different fsid for the referral */
1570 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1571 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1572 status = -EIO;
1573 goto out;
1574 }
1575
1576 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1577 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1578 if (!fattr->mode)
1579 fattr->mode = S_IFDIR;
1580 memset(fhandle, 0, sizeof(struct nfs_fh));
1581out:
1582 if (page)
1583 __free_page(page);
1584 if (locations)
1585 kfree(locations);
1586 return status;
1587}
1588
1da177e4
LT		 1589static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1590{
1591 struct nfs4_getattr_arg args = {
1592 .fh = fhandle,
1593 .bitmask = server->attr_bitmask,
1594 };
1595 struct nfs4_getattr_res res = {
1596 .fattr = fattr,
1597 .server = server,
1598 };
1599 struct rpc_message msg = {
1600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1601 .rpc_argp = &args,
1602 .rpc_resp = &res,
1603 };
1604
0e574af1 1605 nfs_fattr_init(fattr);
1da177e4
LT		 1606 return rpc_call_sync(server->client, &msg, 0);
1607}
1608
1609static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1610{
1611 struct nfs4_exception exception = { };
1612 int err;
1613 do {
1614 err = nfs4_handle_exception(server,
1615 _nfs4_proc_getattr(server, fhandle, fattr),
1616 &exception);
1617 } while (exception.retry);
1618 return err;
1619}
1620
1621/*
1622 * The file is not closed if it is opened due to the a request to change
1623 * the size of the file. The open call will not be needed once the
1624 * VFS layer lookup-intents are implemented.
1625 *
1626 * Close is called when the inode is destroyed.
1627 * If we haven't opened the file for O_WRONLY, we
1628 * need to in the size_change case to obtain a stateid.
1629 *
1630 * Got race?
1631 * Because OPEN is always done by name in nfsv4, it is
1632 * possible that we opened a different file by the same
1633 * name. We can recognize this race condition, but we
1634 * can't do anything about it besides returning an error.
1635 *
1636 * This will be fixed with VFS changes (lookup-intent).
1637 */
1638static int
1639nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1640 struct iattr *sattr)
1641{
08e9eac4
TM		 1642 struct rpc_cred *cred;
1643 struct inode *inode = dentry->d_inode;
d530838b
TM		 1644 struct nfs_open_context *ctx;
1645 struct nfs4_state *state = NULL;
1da177e4
LT		 1646 int status;
1647
0e574af1 1648 nfs_fattr_init(fattr);
1da177e4 1649
1f163415 1650 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM		 1651 if (IS_ERR(cred))
1652 return PTR_ERR(cred);
d530838b
TM		 1653
1654 /* Search for an existing open(O_WRITE) file */
1655 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1656 if (ctx != NULL)
1657 state = ctx->state;
08e9eac4 1658
3e4f6290 1659 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1660 if (status == 0)
1661 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1662 if (ctx != NULL)
1663 put_nfs_open_context(ctx);
08e9eac4 1664 put_rpccred(cred);
1da177e4
LT		 1665 return status;
1666}
1667
56659e99
TM		 1668static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1669 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1670 struct nfs_fattr *fattr)
1671{
1672 int status;
1673 struct nfs4_lookup_arg args = {
1674 .bitmask = server->attr_bitmask,
1675 .dir_fh = dirfh,
1676 .name = name,
1677 };
1678 struct nfs4_lookup_res res = {
1679 .server = server,
1680 .fattr = fattr,
1681 .fh = fhandle,
1682 };
1683 struct rpc_message msg = {
1684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1685 .rpc_argp = &args,
1686 .rpc_resp = &res,
1687 };
1688
1689 nfs_fattr_init(fattr);
1690
1691 dprintk("NFS call lookupfh %s\n", name->name);
1692 status = rpc_call_sync(server->client, &msg, 0);
1693 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1694 return status;
1695}
1696
1697static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1698 struct qstr *name, struct nfs_fh *fhandle,
1699 struct nfs_fattr *fattr)
1700{
1701 struct nfs4_exception exception = { };
1702 int err;
1703 do {
4e56e082
TM		 1704 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1705 /* FIXME: !!!! */
1706 if (err == -NFS4ERR_MOVED) {
1707 err = -EREMOTE;
1708 break;
1709 }
1710 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1711 } while (exception.retry);
1712 return err;
1713}
1714
56659e99 1715static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1716 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1717{
4e56e082 1718 int status;
1da177e4
LT		 1719
1720 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1721 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1722 if (status == -NFS4ERR_MOVED)
1723 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1724 dprintk("NFS reply lookup: %d\n", status);
1725 return status;
1726}
1727
1728static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1729{
1730 struct nfs4_exception exception = { };
1731 int err;
1732 do {
1733 err = nfs4_handle_exception(NFS_SERVER(dir),
1734 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1735 &exception);
1736 } while (exception.retry);
1737 return err;
1738}
1739
1740static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1741{
76b32999
TM		 1742 struct nfs_server *server = NFS_SERVER(inode);
1743 struct nfs_fattr fattr;
1da177e4
LT		 1744 struct nfs4_accessargs args = {
1745 .fh = NFS_FH(inode),
76b32999
TM		 1746 .bitmask = server->attr_bitmask,
1747 };
1748 struct nfs4_accessres res = {
1749 .server = server,
1750 .fattr = &fattr,
1da177e4 1751 };
1da177e4
LT		 1752 struct rpc_message msg = {
1753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1754 .rpc_argp = &args,
1755 .rpc_resp = &res,
1756 .rpc_cred = entry->cred,
1757 };
1758 int mode = entry->mask;
1759 int status;
1760
1761 /*
1762 * Determine which access bits we want to ask for...
1763 */
1764 if (mode & MAY_READ)
1765 args.access |= NFS4_ACCESS_READ;
1766 if (S_ISDIR(inode->i_mode)) {
1767 if (mode & MAY_WRITE)
1768 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1769 if (mode & MAY_EXEC)
1770 args.access |= NFS4_ACCESS_LOOKUP;
1771 } else {
1772 if (mode & MAY_WRITE)
1773 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1774 if (mode & MAY_EXEC)
1775 args.access |= NFS4_ACCESS_EXECUTE;
1776 }
76b32999 1777 nfs_fattr_init(&fattr);
1da177e4
LT		 1778 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1779 if (!status) {
1780 entry->mask = 0;
1781 if (res.access & NFS4_ACCESS_READ)
1782 entry->mask |= MAY_READ;
1783 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1784 entry->mask |= MAY_WRITE;
1785 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1786 entry->mask |= MAY_EXEC;
76b32999 1787 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1788 }
1789 return status;
1790}
1791
1792static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1793{
1794 struct nfs4_exception exception = { };
1795 int err;
1796 do {
1797 err = nfs4_handle_exception(NFS_SERVER(inode),
1798 _nfs4_proc_access(inode, entry),
1799 &exception);
1800 } while (exception.retry);
1801 return err;
1802}
1803
1804/*
1805 * TODO: For the time being, we don't try to get any attributes
1806 * along with any of the zero-copy operations READ, READDIR,
1807 * READLINK, WRITE.
1808 *
1809 * In the case of the first three, we want to put the GETATTR
1810 * after the read-type operation -- this is because it is hard
1811 * to predict the length of a GETATTR response in v4, and thus
1812 * align the READ data correctly. This means that the GETATTR
1813 * may end up partially falling into the page cache, and we should
1814 * shift it into the 'tail' of the xdr_buf before processing.
1815 * To do this efficiently, we need to know the total length
1816 * of data received, which doesn't seem to be available outside
1817 * of the RPC layer.
1818 *
1819 * In the case of WRITE, we also want to put the GETATTR after
1820 * the operation -- in this case because we want to make sure
1821 * we get the post-operation mtime and size. This means that
1822 * we can't use xdr_encode_pages() as written: we need a variant
1823 * of it which would leave room in the 'tail' iovec.
1824 *
1825 * Both of these changes to the XDR layer would in fact be quite
1826 * minor, but I decided to leave them for a subsequent patch.
1827 */
1828static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1829 unsigned int pgbase, unsigned int pglen)
1830{
1831 struct nfs4_readlink args = {
1832 .fh = NFS_FH(inode),
1833 .pgbase = pgbase,
1834 .pglen = pglen,
1835 .pages = &page,
1836 };
1837 struct rpc_message msg = {
1838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1839 .rpc_argp = &args,
1840 .rpc_resp = NULL,
1841 };
1842
1843 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1844}
1845
1846static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1847 unsigned int pgbase, unsigned int pglen)
1848{
1849 struct nfs4_exception exception = { };
1850 int err;
1851 do {
1852 err = nfs4_handle_exception(NFS_SERVER(inode),
1853 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1854 &exception);
1855 } while (exception.retry);
1856 return err;
1857}
1858
1da177e4
LT		 1859/*
1860 * Got race?
1861 * We will need to arrange for the VFS layer to provide an atomic open.
1862 * Until then, this create/open method is prone to inefficiency and race
1863 * conditions due to the lookup, create, and open VFS calls from sys_open()
1864 * placed on the wire.
1865 *
1866 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1867 * The file will be opened again in the subsequent VFS open call
1868 * (nfs4_proc_file_open).
1869 *
1870 * The open for read will just hang around to be used by any process that
1871 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1872 */
1873
1874static int
1875nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1876 int flags, struct nameidata *nd)
1da177e4 1877{
ad389da7
TM		 1878 struct path path = {
1879 .mnt = nd->mnt,
1880 .dentry = dentry,
1881 };
1da177e4
LT		 1882 struct nfs4_state *state;
1883 struct rpc_cred *cred;
1884 int status = 0;
1885
1f163415 1886 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1887 if (IS_ERR(cred)) {
1888 status = PTR_ERR(cred);
1889 goto out;
1890 }
ad389da7 1891 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4 1892 put_rpccred(cred);
d4d9cdcb 1893 d_drop(dentry);
1da177e4
LT		 1894 if (IS_ERR(state)) {
1895 status = PTR_ERR(state);
1896 goto out;
1897 }
d4d9cdcb 1898 d_add(dentry, igrab(state->inode));
d75340cc 1899 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 1900 if (flags & O_EXCL) {
1901 struct nfs_fattr fattr;
3e4f6290 1902 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1903 if (status == 0)
65e4308d 1904 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1905 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1906 }
ad389da7 1907 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1908 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1909 else
a49c3c77 1910 nfs4_close_sync(&path, state, flags);
1da177e4
LT		 1911out:
1912 return status;
1913}
1914
1915static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1916{
16e42959 1917 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 1918 struct nfs_removeargs args = {
1da177e4 1919 .fh = NFS_FH(dir),
4fdc17b2
TM		 1920 .name.len = name->len,
1921 .name.name = name->name,
16e42959
TM		 1922 .bitmask = server->attr_bitmask,
1923 };
4fdc17b2 1924 struct nfs_removeres res = {
16e42959 1925 .server = server,
1da177e4 1926 };
1da177e4 1927 struct rpc_message msg = {
4fdc17b2
TM		 1928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1929 .rpc_argp = &args,
1930 .rpc_resp = &res,
1da177e4
LT		 1931 };
1932 int status;
1933
4fdc17b2 1934 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 1935 status = rpc_call_sync(server->client, &msg, 0);
1936 if (status == 0) {
1937 update_changeattr(dir, &res.cinfo);
4fdc17b2 1938 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 1939 }
1da177e4
LT		 1940 return status;
1941}
1942
1943static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1944{
1945 struct nfs4_exception exception = { };
1946 int err;
1947 do {
1948 err = nfs4_handle_exception(NFS_SERVER(dir),
1949 _nfs4_proc_remove(dir, name),
1950 &exception);
1951 } while (exception.retry);
1952 return err;
1953}
1954
e4eff1a6 1955static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 1956{
e4eff1a6
TM		 1957 struct nfs_server *server = NFS_SERVER(dir);
1958 struct nfs_removeargs *args = msg->rpc_argp;
1959 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 1960
e4eff1a6
TM		 1961 args->bitmask = server->attr_bitmask;
1962 res->server = server;
1da177e4 1963 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 1964}
1965
e4eff1a6 1966static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 1967{
e4eff1a6
TM		 1968 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1969
1970 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1971 return 0;
1972 update_changeattr(dir, &res->cinfo);
1973 nfs_post_op_update_inode(dir, &res->dir_attr);
1974 return 1;
1da177e4
LT		 1975}
1976
1977static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1978 struct inode *new_dir, struct qstr *new_name)
1979{
6caf2c82 1980 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1981 struct nfs4_rename_arg arg = {
1982 .old_dir = NFS_FH(old_dir),
1983 .new_dir = NFS_FH(new_dir),
1984 .old_name = old_name,
1985 .new_name = new_name,
6caf2c82
TM		 1986 .bitmask = server->attr_bitmask,
1987 };
1988 struct nfs_fattr old_fattr, new_fattr;
1989 struct nfs4_rename_res res = {
1990 .server = server,
1991 .old_fattr = &old_fattr,
1992 .new_fattr = &new_fattr,
1da177e4 1993 };
1da177e4
LT		 1994 struct rpc_message msg = {
1995 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1996 .rpc_argp = &arg,
1997 .rpc_resp = &res,
1998 };
1999 int status;
2000
6caf2c82
TM		 2001 nfs_fattr_init(res.old_fattr);
2002 nfs_fattr_init(res.new_fattr);
2003 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2004
2005 if (!status) {
2006 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2007 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2008 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2009 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2010 }
2011 return status;
2012}
2013
2014static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2015 struct inode *new_dir, struct qstr *new_name)
2016{
2017 struct nfs4_exception exception = { };
2018 int err;
2019 do {
2020 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2021 _nfs4_proc_rename(old_dir, old_name,
2022 new_dir, new_name),
2023 &exception);
2024 } while (exception.retry);
2025 return err;
2026}
2027
2028static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2029{
91ba2eee 2030 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2031 struct nfs4_link_arg arg = {
2032 .fh = NFS_FH(inode),
2033 .dir_fh = NFS_FH(dir),
2034 .name = name,
91ba2eee
TM		 2035 .bitmask = server->attr_bitmask,
2036 };
2037 struct nfs_fattr fattr, dir_attr;
2038 struct nfs4_link_res res = {
2039 .server = server,
2040 .fattr = &fattr,
2041 .dir_attr = &dir_attr,
1da177e4 2042 };
1da177e4
LT		 2043 struct rpc_message msg = {
2044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2045 .rpc_argp = &arg,
91ba2eee 2046 .rpc_resp = &res,
1da177e4
LT		 2047 };
2048 int status;
2049
91ba2eee
TM		 2050 nfs_fattr_init(res.fattr);
2051 nfs_fattr_init(res.dir_attr);
2052 status = rpc_call_sync(server->client, &msg, 0);
2053 if (!status) {
2054 update_changeattr(dir, &res.cinfo);
2055 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2056 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2057 }
1da177e4
LT		 2058
2059 return status;
2060}
2061
2062static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2063{
2064 struct nfs4_exception exception = { };
2065 int err;
2066 do {
2067 err = nfs4_handle_exception(NFS_SERVER(inode),
2068 _nfs4_proc_link(inode, dir, name),
2069 &exception);
2070 } while (exception.retry);
2071 return err;
2072}
2073
4f390c15 2074static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2075 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2076{
2077 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2078 struct nfs_fh fhandle;
2079 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2080 struct nfs4_create_arg arg = {
2081 .dir_fh = NFS_FH(dir),
2082 .server = server,
4f390c15 2083 .name = &dentry->d_name,
1da177e4
LT		 2084 .attrs = sattr,
2085 .ftype = NF4LNK,
2086 .bitmask = server->attr_bitmask,
2087 };
2088 struct nfs4_create_res res = {
2089 .server = server,
4f390c15
CL		 2090 .fh = &fhandle,
2091 .fattr = &fattr,
56ae19f3 2092 .dir_fattr = &dir_fattr,
1da177e4
LT		 2093 };
2094 struct rpc_message msg = {
2095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2096 .rpc_argp = &arg,
2097 .rpc_resp = &res,
2098 };
2099 int status;
2100
94a6d753 2101 if (len > NFS4_MAXPATHLEN)
1da177e4 2102 return -ENAMETOOLONG;
4f390c15 2103
94a6d753
CL		 2104 arg.u.symlink.pages = &page;
2105 arg.u.symlink.len = len;
4f390c15 2106 nfs_fattr_init(&fattr);
56ae19f3 2107 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2108
2109 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2110 if (!status) {
1da177e4 2111 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2112 nfs_post_op_update_inode(dir, res.dir_fattr);
2113 status = nfs_instantiate(dentry, &fhandle, &fattr);
2114 }
1da177e4
LT		 2115 return status;
2116}
2117
4f390c15 2118static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2119 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2120{
2121 struct nfs4_exception exception = { };
2122 int err;
2123 do {
2124 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2125 _nfs4_proc_symlink(dir, dentry, page,
2126 len, sattr),
1da177e4
LT		 2127 &exception);
2128 } while (exception.retry);
2129 return err;
2130}
2131
2132static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2133 struct iattr *sattr)
2134{
2135 struct nfs_server *server = NFS_SERVER(dir);
2136 struct nfs_fh fhandle;
56ae19f3 2137 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2138 struct nfs4_create_arg arg = {
2139 .dir_fh = NFS_FH(dir),
2140 .server = server,
2141 .name = &dentry->d_name,
2142 .attrs = sattr,
2143 .ftype = NF4DIR,
2144 .bitmask = server->attr_bitmask,
2145 };
2146 struct nfs4_create_res res = {
2147 .server = server,
2148 .fh = &fhandle,
2149 .fattr = &fattr,
56ae19f3 2150 .dir_fattr = &dir_fattr,
1da177e4
LT		 2151 };
2152 struct rpc_message msg = {
2153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2154 .rpc_argp = &arg,
2155 .rpc_resp = &res,
2156 };
2157 int status;
2158
0e574af1 2159 nfs_fattr_init(&fattr);
56ae19f3 2160 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2161
2162 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2163 if (!status) {
2164 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2165 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2166 status = nfs_instantiate(dentry, &fhandle, &fattr);
2167 }
2168 return status;
2169}
2170
2171static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2172 struct iattr *sattr)
2173{
2174 struct nfs4_exception exception = { };
2175 int err;
2176 do {
2177 err = nfs4_handle_exception(NFS_SERVER(dir),
2178 _nfs4_proc_mkdir(dir, dentry, sattr),
2179 &exception);
2180 } while (exception.retry);
2181 return err;
2182}
2183
2184static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2185 u64 cookie, struct page *page, unsigned int count, int plus)
2186{
2187 struct inode *dir = dentry->d_inode;
2188 struct nfs4_readdir_arg args = {
2189 .fh = NFS_FH(dir),
2190 .pages = &page,
2191 .pgbase = 0,
2192 .count = count,
2193 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2194 };
2195 struct nfs4_readdir_res res;
2196 struct rpc_message msg = {
2197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2198 .rpc_argp = &args,
2199 .rpc_resp = &res,
2200 .rpc_cred = cred,
2201 };
2202 int status;
2203
eadf4598
TM		 2204 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2205 dentry->d_parent->d_name.name,
2206 dentry->d_name.name,
2207 (unsigned long long)cookie);
1da177e4
LT		 2208 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2209 res.pgbase = args.pgbase;
2210 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2211 if (status == 0)
2212 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2213
2214 nfs_invalidate_atime(dir);
2215
eadf4598 2216 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2217 return status;
2218}
2219
2220static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2221 u64 cookie, struct page *page, unsigned int count, int plus)
2222{
2223 struct nfs4_exception exception = { };
2224 int err;
2225 do {
2226 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2227 _nfs4_proc_readdir(dentry, cred, cookie,
2228 page, count, plus),
2229 &exception);
2230 } while (exception.retry);
2231 return err;
2232}
2233
2234static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2235 struct iattr *sattr, dev_t rdev)
2236{
2237 struct nfs_server *server = NFS_SERVER(dir);
2238 struct nfs_fh fh;
56ae19f3 2239 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2240 struct nfs4_create_arg arg = {
2241 .dir_fh = NFS_FH(dir),
2242 .server = server,
2243 .name = &dentry->d_name,
2244 .attrs = sattr,
2245 .bitmask = server->attr_bitmask,
2246 };
2247 struct nfs4_create_res res = {
2248 .server = server,
2249 .fh = &fh,
2250 .fattr = &fattr,
56ae19f3 2251 .dir_fattr = &dir_fattr,
1da177e4
LT		 2252 };
2253 struct rpc_message msg = {
2254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2255 .rpc_argp = &arg,
2256 .rpc_resp = &res,
2257 };
2258 int status;
2259 int mode = sattr->ia_mode;
2260
0e574af1 2261 nfs_fattr_init(&fattr);
56ae19f3 2262 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2263
2264 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2265 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2266 if (S_ISFIFO(mode))
2267 arg.ftype = NF4FIFO;
2268 else if (S_ISBLK(mode)) {
2269 arg.ftype = NF4BLK;
2270 arg.u.device.specdata1 = MAJOR(rdev);
2271 arg.u.device.specdata2 = MINOR(rdev);
2272 }
2273 else if (S_ISCHR(mode)) {
2274 arg.ftype = NF4CHR;
2275 arg.u.device.specdata1 = MAJOR(rdev);
2276 arg.u.device.specdata2 = MINOR(rdev);
2277 }
2278 else
2279 arg.ftype = NF4SOCK;
2280
2281 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2282 if (status == 0) {
2283 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2284 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2285 status = nfs_instantiate(dentry, &fh, &fattr);
2286 }
2287 return status;
2288}
2289
2290static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2291 struct iattr *sattr, dev_t rdev)
2292{
2293 struct nfs4_exception exception = { };
2294 int err;
2295 do {
2296 err = nfs4_handle_exception(NFS_SERVER(dir),
2297 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2298 &exception);
2299 } while (exception.retry);
2300 return err;
2301}
2302
2303static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2304 struct nfs_fsstat *fsstat)
2305{
2306 struct nfs4_statfs_arg args = {
2307 .fh = fhandle,
2308 .bitmask = server->attr_bitmask,
2309 };
2310 struct rpc_message msg = {
2311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2312 .rpc_argp = &args,
2313 .rpc_resp = fsstat,
2314 };
2315
0e574af1 2316 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2317 return rpc_call_sync(server->client, &msg, 0);
2318}
2319
2320static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2321{
2322 struct nfs4_exception exception = { };
2323 int err;
2324 do {
2325 err = nfs4_handle_exception(server,
2326 _nfs4_proc_statfs(server, fhandle, fsstat),
2327 &exception);
2328 } while (exception.retry);
2329 return err;
2330}
2331
2332static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2333 struct nfs_fsinfo *fsinfo)
2334{
2335 struct nfs4_fsinfo_arg args = {
2336 .fh = fhandle,
2337 .bitmask = server->attr_bitmask,
2338 };
2339 struct rpc_message msg = {
2340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2341 .rpc_argp = &args,
2342 .rpc_resp = fsinfo,
2343 };
2344
2345 return rpc_call_sync(server->client, &msg, 0);
2346}
2347
2348static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2349{
2350 struct nfs4_exception exception = { };
2351 int err;
2352
2353 do {
2354 err = nfs4_handle_exception(server,
2355 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2356 &exception);
2357 } while (exception.retry);
2358 return err;
2359}
2360
2361static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2362{
0e574af1 2363 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2364 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2365}
2366
2367static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2368 struct nfs_pathconf *pathconf)
2369{
2370 struct nfs4_pathconf_arg args = {
2371 .fh = fhandle,
2372 .bitmask = server->attr_bitmask,
2373 };
2374 struct rpc_message msg = {
2375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2376 .rpc_argp = &args,
2377 .rpc_resp = pathconf,
2378 };
2379
2380 /* None of the pathconf attributes are mandatory to implement */
2381 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2382 memset(pathconf, 0, sizeof(*pathconf));
2383 return 0;
2384 }
2385
0e574af1 2386 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2387 return rpc_call_sync(server->client, &msg, 0);
2388}
2389
2390static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2391 struct nfs_pathconf *pathconf)
2392{
2393 struct nfs4_exception exception = { };
2394 int err;
2395
2396 do {
2397 err = nfs4_handle_exception(server,
2398 _nfs4_proc_pathconf(server, fhandle, pathconf),
2399 &exception);
2400 } while (exception.retry);
2401 return err;
2402}
2403
ec06c096 2404static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2405{
ec06c096 2406 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2407
ec06c096 2408 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2409 rpc_restart_call(task);
ec06c096 2410 return -EAGAIN;
1da177e4 2411 }
8850df99
TM		 2412
2413 nfs_invalidate_atime(data->inode);
1da177e4 2414 if (task->tk_status > 0)
ec06c096
TM		 2415 renew_lease(server, data->timestamp);
2416 return 0;
1da177e4
LT		 2417}
2418
ec06c096 2419static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2420{
1da177e4
LT		 2421 struct rpc_message msg = {
2422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2423 .rpc_argp = &data->args,
2424 .rpc_resp = &data->res,
2425 .rpc_cred = data->cred,
2426 };
1da177e4
LT		 2427
2428 data->timestamp = jiffies;
2429
ec06c096 2430 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2431}
2432
788e7a89 2433static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2434{
1da177e4
LT		 2435 struct inode *inode = data->inode;
2436
2437 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2438 rpc_restart_call(task);
788e7a89 2439 return -EAGAIN;
1da177e4 2440 }
4f9838c7 2441 if (task->tk_status >= 0) {
1da177e4 2442 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2443 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2444 }
788e7a89 2445 return 0;
1da177e4
LT		 2446}
2447
788e7a89 2448static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2449{
1da177e4
LT		 2450 struct rpc_message msg = {
2451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2452 .rpc_argp = &data->args,
2453 .rpc_resp = &data->res,
2454 .rpc_cred = data->cred,
2455 };
2456 struct inode *inode = data->inode;
4f9838c7 2457 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2458 int stable;
1da177e4
LT		 2459
2460 if (how & FLUSH_STABLE) {
2461 if (!NFS_I(inode)->ncommit)
2462 stable = NFS_FILE_SYNC;
2463 else
2464 stable = NFS_DATA_SYNC;
2465 } else
2466 stable = NFS_UNSTABLE;
2467 data->args.stable = stable;
4f9838c7
TM		 2468 data->args.bitmask = server->attr_bitmask;
2469 data->res.server = server;
1da177e4
LT		 2470
2471 data->timestamp = jiffies;
2472
1da177e4 2473 /* Finalize the task. */
788e7a89 2474 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2475}
2476
788e7a89 2477static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2478{
1da177e4
LT		 2479 struct inode *inode = data->inode;
2480
2481 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2482 rpc_restart_call(task);
788e7a89 2483 return -EAGAIN;
1da177e4 2484 }
9e08a3c5 2485 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2486 return 0;
1da177e4
LT		 2487}
2488
788e7a89 2489static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2490{
1da177e4
LT		 2491 struct rpc_message msg = {
2492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2493 .rpc_argp = &data->args,
2494 .rpc_resp = &data->res,
2495 .rpc_cred = data->cred,
2496 };
788e7a89 2497 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2498
4f9838c7
TM		 2499 data->args.bitmask = server->attr_bitmask;
2500 data->res.server = server;
2501
788e7a89 2502 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2503}
2504
2505/*
2506 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2507 * standalone procedure for queueing an asynchronous RENEW.
2508 */
963d8fe5 2509static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2510{
adfa6f98 2511 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2512 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2513
2514 if (task->tk_status < 0) {
2515 switch (task->tk_status) {
2516 case -NFS4ERR_STALE_CLIENTID:
2517 case -NFS4ERR_EXPIRED:
2518 case -NFS4ERR_CB_PATH_DOWN:
2519 nfs4_schedule_state_recovery(clp);
2520 }
2521 return;
2522 }
2523 spin_lock(&clp->cl_lock);
2524 if (time_before(clp->cl_last_renewal,timestamp))
2525 clp->cl_last_renewal = timestamp;
2526 spin_unlock(&clp->cl_lock);
2527}
2528
963d8fe5
TM		 2529static const struct rpc_call_ops nfs4_renew_ops = {
2530 .rpc_call_done = nfs4_renew_done,
2531};
2532
adfa6f98 2533int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2534{
2535 struct rpc_message msg = {
2536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2537 .rpc_argp = clp,
b4454fe1 2538 .rpc_cred = cred,
1da177e4
LT		 2539 };
2540
2541 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2542 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2543}
2544
adfa6f98 2545int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2546{
2547 struct rpc_message msg = {
2548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2549 .rpc_argp = clp,
b4454fe1 2550 .rpc_cred = cred,
1da177e4
LT		 2551 };
2552 unsigned long now = jiffies;
2553 int status;
2554
2555 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2556 if (status < 0)
2557 return status;
2558 spin_lock(&clp->cl_lock);
2559 if (time_before(clp->cl_last_renewal,now))
2560 clp->cl_last_renewal = now;
2561 spin_unlock(&clp->cl_lock);
2562 return 0;
2563}
2564
aa1870af
BF		 2565static inline int nfs4_server_supports_acls(struct nfs_server *server)
2566{
2567 return (server->caps & NFS_CAP_ACLS)
2568 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2569 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2570}
2571
2572/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2573 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2574 * the stack.
2575 */
2576#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2577
2578static void buf_to_pages(const void *buf, size_t buflen,
2579 struct page **pages, unsigned int *pgbase)
2580{
2581 const void *p = buf;
2582
2583 *pgbase = offset_in_page(buf);
2584 p -= *pgbase;
2585 while (p < buf + buflen) {
2586 *(pages++) = virt_to_page(p);
2587 p += PAGE_CACHE_SIZE;
2588 }
2589}
2590
e50a1c2e
BF		 2591struct nfs4_cached_acl {
2592 int cached;
2593 size_t len;
3e9d4154 2594 char data[0];
e50a1c2e
BF		 2595};
2596
2597static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2598{
2599 struct nfs_inode *nfsi = NFS_I(inode);
2600
2601 spin_lock(&inode->i_lock);
2602 kfree(nfsi->nfs4_acl);
2603 nfsi->nfs4_acl = acl;
2604 spin_unlock(&inode->i_lock);
2605}
2606
2607static void nfs4_zap_acl_attr(struct inode *inode)
2608{
2609 nfs4_set_cached_acl(inode, NULL);
2610}
2611
2612static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2613{
2614 struct nfs_inode *nfsi = NFS_I(inode);
2615 struct nfs4_cached_acl *acl;
2616 int ret = -ENOENT;
2617
2618 spin_lock(&inode->i_lock);
2619 acl = nfsi->nfs4_acl;
2620 if (acl == NULL)
2621 goto out;
2622 if (buf == NULL) /* user is just asking for length */
2623 goto out_len;
2624 if (acl->cached == 0)
2625 goto out;
2626 ret = -ERANGE; /* see getxattr(2) man page */
2627 if (acl->len > buflen)
2628 goto out;
2629 memcpy(buf, acl->data, acl->len);
2630out_len:
2631 ret = acl->len;
2632out:
2633 spin_unlock(&inode->i_lock);
2634 return ret;
2635}
2636
2637static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2638{
2639 struct nfs4_cached_acl *acl;
2640
2641 if (buf && acl_len <= PAGE_SIZE) {
2642 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2643 if (acl == NULL)
2644 goto out;
2645 acl->cached = 1;
2646 memcpy(acl->data, buf, acl_len);
2647 } else {
2648 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2649 if (acl == NULL)
2650 goto out;
2651 acl->cached = 0;
2652 }
2653 acl->len = acl_len;
2654out:
2655 nfs4_set_cached_acl(inode, acl);
2656}
2657
16b4289c 2658static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2659{
aa1870af
BF		 2660 struct page *pages[NFS4ACL_MAXPAGES];
2661 struct nfs_getaclargs args = {
2662 .fh = NFS_FH(inode),
2663 .acl_pages = pages,
2664 .acl_len = buflen,
2665 };
2666 size_t resp_len = buflen;
e50a1c2e 2667 void *resp_buf;
aa1870af
BF		 2668 struct rpc_message msg = {
2669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2670 .rpc_argp = &args,
2671 .rpc_resp = &resp_len,
2672 };
e50a1c2e 2673 struct page *localpage = NULL;
aa1870af
BF		 2674 int ret;
2675
e50a1c2e
BF		 2676 if (buflen < PAGE_SIZE) {
2677 /* As long as we're doing a round trip to the server anyway,
2678 * let's be prepared for a page of acl data. */
2679 localpage = alloc_page(GFP_KERNEL);
2680 resp_buf = page_address(localpage);
2681 if (localpage == NULL)
2682 return -ENOMEM;
2683 args.acl_pages[0] = localpage;
2684 args.acl_pgbase = 0;
1d95db8e 2685 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2686 } else {
2687 resp_buf = buf;
2688 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2689 }
aa1870af 2690 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2691 if (ret)
2692 goto out_free;
2693 if (resp_len > args.acl_len)
2694 nfs4_write_cached_acl(inode, NULL, resp_len);
2695 else
2696 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2697 if (buf) {
2698 ret = -ERANGE;
2699 if (resp_len > buflen)
2700 goto out_free;
2701 if (localpage)
2702 memcpy(buf, resp_buf, resp_len);
2703 }
2704 ret = resp_len;
2705out_free:
2706 if (localpage)
2707 __free_page(localpage);
aa1870af
BF		 2708 return ret;
2709}
2710
16b4289c
TM		 2711static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2712{
2713 struct nfs4_exception exception = { };
2714 ssize_t ret;
2715 do {
2716 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2717 if (ret >= 0)
2718 break;
2719 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2720 } while (exception.retry);
2721 return ret;
2722}
2723
e50a1c2e
BF		 2724static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2725{
2726 struct nfs_server *server = NFS_SERVER(inode);
2727 int ret;
2728
2729 if (!nfs4_server_supports_acls(server))
2730 return -EOPNOTSUPP;
2731 ret = nfs_revalidate_inode(server, inode);
2732 if (ret < 0)
2733 return ret;
2734 ret = nfs4_read_cached_acl(inode, buf, buflen);
2735 if (ret != -ENOENT)
2736 return ret;
2737 return nfs4_get_acl_uncached(inode, buf, buflen);
2738}
2739
16b4289c 2740static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2741{
2742 struct nfs_server *server = NFS_SERVER(inode);
2743 struct page *pages[NFS4ACL_MAXPAGES];
2744 struct nfs_setaclargs arg = {
2745 .fh = NFS_FH(inode),
2746 .acl_pages = pages,
2747 .acl_len = buflen,
2748 };
2749 struct rpc_message msg = {
2750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2751 .rpc_argp = &arg,
2752 .rpc_resp = NULL,
2753 };
2754 int ret;
2755
2756 if (!nfs4_server_supports_acls(server))
2757 return -EOPNOTSUPP;
642ac549 2758 nfs_inode_return_delegation(inode);
4b580ee3 2759 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2760 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2761 nfs_zap_caches(inode);
4b580ee3
BF		 2762 return ret;
2763}
2764
16b4289c
TM		 2765static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2766{
2767 struct nfs4_exception exception = { };
2768 int err;
2769 do {
2770 err = nfs4_handle_exception(NFS_SERVER(inode),
2771 __nfs4_proc_set_acl(inode, buf, buflen),
2772 &exception);
2773 } while (exception.retry);
2774 return err;
2775}
2776
1da177e4 2777static int
faf5f49c 2778nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2779{
7539bbab 2780 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2781
2782 if (!clp || task->tk_status >= 0)
2783 return 0;
2784 switch(task->tk_status) {
2785 case -NFS4ERR_STALE_CLIENTID:
2786 case -NFS4ERR_STALE_STATEID:
2787 case -NFS4ERR_EXPIRED:
2788 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2789 nfs4_schedule_state_recovery(clp);
433fbe4c 2790 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2791 rpc_wake_up_task(task);
2792 task->tk_status = 0;
2793 return -EAGAIN;
1da177e4 2794 case -NFS4ERR_DELAY:
006ea73e
CL		 2795 nfs_inc_server_stats((struct nfs_server *) server,
2796 NFSIOS_DELAY);
2797 case -NFS4ERR_GRACE:
1da177e4
LT		 2798 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2799 task->tk_status = 0;
2800 return -EAGAIN;
2801 case -NFS4ERR_OLD_STATEID:
2802 task->tk_status = 0;
2803 return -EAGAIN;
2804 }
2805 task->tk_status = nfs4_map_errors(task->tk_status);
2806 return 0;
2807}
2808
433fbe4c
TM		 2809static int nfs4_wait_bit_interruptible(void *word)
2810{
2811 if (signal_pending(current))
2812 return -ERESTARTSYS;
2813 schedule();
2814 return 0;
2815}
2816
adfa6f98 2817static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2818{
1da177e4 2819 sigset_t oldset;
433fbe4c 2820 int res;
1da177e4
LT		 2821
2822 might_sleep();
2823
e148582e
TM		 2824 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2825
1da177e4 2826 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2827 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2828 nfs4_wait_bit_interruptible,
2829 TASK_INTERRUPTIBLE);
1da177e4 2830 rpc_clnt_sigunmask(clnt, &oldset);
e148582e
TM		 2831
2832 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2833 return res;
2834}
2835
2836static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2837{
2838 sigset_t oldset;
2839 int res = 0;
2840
2841 might_sleep();
2842
2843 if (*timeout <= 0)
2844 *timeout = NFS4_POLL_RETRY_MIN;
2845 if (*timeout > NFS4_POLL_RETRY_MAX)
2846 *timeout = NFS4_POLL_RETRY_MAX;
2847 rpc_clnt_sigmask(clnt, &oldset);
2848 if (clnt->cl_intr) {
041e0e3b 2849 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2850 if (signalled())
2851 res = -ERESTARTSYS;
041e0e3b
NA		 2852 } else
2853 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2854 rpc_clnt_sigunmask(clnt, &oldset);
2855 *timeout <<= 1;
2856 return res;
2857}
2858
2859/* This is the error handling routine for processes that are allowed
2860 * to sleep.
2861 */
10afec90 2862static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2863{
7539bbab 2864 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2865 int ret = errorcode;
2866
2867 exception->retry = 0;
2868 switch(errorcode) {
2869 case 0:
2870 return 0;
2871 case -NFS4ERR_STALE_CLIENTID:
2872 case -NFS4ERR_STALE_STATEID:
2873 case -NFS4ERR_EXPIRED:
433fbe4c 2874 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2875 ret = nfs4_wait_clnt_recover(server->client, clp);
2876 if (ret == 0)
2877 exception->retry = 1;
2878 break;
c514983d 2879 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2880 case -NFS4ERR_GRACE:
2881 case -NFS4ERR_DELAY:
2882 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2883 if (ret != 0)
2884 break;
1da177e4 2885 case -NFS4ERR_OLD_STATEID:
2c56617d 2886 exception->retry = 1;
1da177e4
LT		 2887 }
2888 /* We failed to handle the error */
2889 return nfs4_map_errors(ret);
2890}
2891
adfa6f98 2892int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2893{
2894 nfs4_verifier sc_verifier;
2895 struct nfs4_setclientid setclientid = {
2896 .sc_verifier = &sc_verifier,
2897 .sc_prog = program,
2898 };
2899 struct rpc_message msg = {
2900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2901 .rpc_argp = &setclientid,
2902 .rpc_resp = clp,
286d7d6a 2903 .rpc_cred = cred,
1da177e4 2904 };
bc4785cd 2905 __be32 *p;
1da177e4
LT		 2906 int loop = 0;
2907 int status;
2908
bc4785cd 2909 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2910 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2911 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2912
2913 for(;;) {
2914 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2915 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
24c8dbbb 2916 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
286d7d6a 2917 cred->cr_ops->cr_name,
1da177e4
LT		 2918 clp->cl_id_uniquifier);
2919 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2920 sizeof(setclientid.sc_netid), "tcp");
2921 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2922 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2923 clp->cl_ipaddr, port >> 8, port & 255);
2924
2925 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2926 if (status != -NFS4ERR_CLID_INUSE)
2927 break;
2928 if (signalled())
2929 break;
2930 if (loop++ & 1)
2931 ssleep(clp->cl_lease_time + 1);
2932 else
2933 if (++clp->cl_id_uniquifier == 0)
2934 break;
2935 }
2936 return status;
2937}
2938
adfa6f98 2939static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2940{
2941 struct nfs_fsinfo fsinfo;
2942 struct rpc_message msg = {
2943 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2944 .rpc_argp = clp,
2945 .rpc_resp = &fsinfo,
286d7d6a 2946 .rpc_cred = cred,
1da177e4
LT		 2947 };
2948 unsigned long now;
2949 int status;
2950
2951 now = jiffies;
2952 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2953 if (status == 0) {
2954 spin_lock(&clp->cl_lock);
2955 clp->cl_lease_time = fsinfo.lease_time * HZ;
2956 clp->cl_last_renewal = now;
58d9714a 2957 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2958 spin_unlock(&clp->cl_lock);
2959 }
2960 return status;
2961}
2962
adfa6f98 2963int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2964{
2965 long timeout;
2966 int err;
2967 do {
2968 err = _nfs4_proc_setclientid_confirm(clp, cred);
2969 switch (err) {
2970 case 0:
2971 return err;
2972 case -NFS4ERR_RESOURCE:
2973 /* The IBM lawyers misread another document! */
2974 case -NFS4ERR_DELAY:
2975 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2976 }
2977 } while (err == 0);
2978 return err;
2979}
2980
fe650407
TM		 2981struct nfs4_delegreturndata {
2982 struct nfs4_delegreturnargs args;
fa178f29 2983 struct nfs4_delegreturnres res;
fe650407
TM		 2984 struct nfs_fh fh;
2985 nfs4_stateid stateid;
2986 struct rpc_cred *cred;
26e976a8 2987 unsigned long timestamp;
fa178f29 2988 struct nfs_fattr fattr;
fe650407
TM		 2989 int rpc_status;
2990};
2991
2992static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2993{
fe650407 2994 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 2995 struct rpc_message msg = {
2996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 2997 .rpc_argp = &data->args,
fa178f29 2998 .rpc_resp = &data->res,
fe650407 2999 .rpc_cred = data->cred,
1da177e4 3000 };
fa178f29 3001 nfs_fattr_init(data->res.fattr);
fe650407
TM		 3002 rpc_call_setup(task, &msg, 0);
3003}
1da177e4 3004
fe650407
TM		 3005static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3006{
3007 struct nfs4_delegreturndata *data = calldata;
3008 data->rpc_status = task->tk_status;
26e976a8 3009 if (data->rpc_status == 0)
fa178f29 3010 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3011}
3012
3013static void nfs4_delegreturn_release(void *calldata)
3014{
3015 struct nfs4_delegreturndata *data = calldata;
3016
3017 put_rpccred(data->cred);
3018 kfree(calldata);
3019}
3020
c8d149f3 3021static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3022 .rpc_call_prepare = nfs4_delegreturn_prepare,
3023 .rpc_call_done = nfs4_delegreturn_done,
3024 .rpc_release = nfs4_delegreturn_release,
3025};
3026
3027static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3028{
3029 struct nfs4_delegreturndata *data;
fa178f29 3030 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 3031 struct rpc_task *task;
3032 int status;
3033
3034 data = kmalloc(sizeof(*data), GFP_KERNEL);
3035 if (data == NULL)
3036 return -ENOMEM;
3037 data->args.fhandle = &data->fh;
3038 data->args.stateid = &data->stateid;
fa178f29 3039 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3040 nfs_copy_fh(&data->fh, NFS_FH(inode));
3041 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3042 data->res.fattr = &data->fattr;
3043 data->res.server = server;
fe650407 3044 data->cred = get_rpccred(cred);
26e976a8 3045 data->timestamp = jiffies;
fe650407
TM		 3046 data->rpc_status = 0;
3047
3048 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 3049 if (IS_ERR(task))
fe650407 3050 return PTR_ERR(task);
fe650407 3051 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 3052 if (status == 0) {
fe650407 3053 status = data->rpc_status;
fa178f29 3054 if (status == 0)
9e08a3c5 3055 nfs_refresh_inode(inode, &data->fattr);
fa178f29 3056 }
e6b3c4db 3057 rpc_put_task(task);
fe650407 3058 return status;
1da177e4
LT		 3059}
3060
3061int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3062{
3063 struct nfs_server *server = NFS_SERVER(inode);
3064 struct nfs4_exception exception = { };
3065 int err;
3066 do {
3067 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3068 switch (err) {
3069 case -NFS4ERR_STALE_STATEID:
3070 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3071 case 0:
3072 return 0;
3073 }
3074 err = nfs4_handle_exception(server, err, &exception);
3075 } while (exception.retry);
3076 return err;
3077}
3078
3079#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3080#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3081
3082/*
3083 * sleep, with exponential backoff, and retry the LOCK operation.
3084 */
3085static unsigned long
3086nfs4_set_lock_task_retry(unsigned long timeout)
3087{
041e0e3b 3088 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3089 timeout <<= 1;
3090 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3091 return NFS4_LOCK_MAXTIMEOUT;
3092 return timeout;
3093}
3094
1da177e4
LT		 3095static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3096{
3097 struct inode *inode = state->inode;
3098 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3099 struct nfs_client *clp = server->nfs_client;
911d1aaf 3100 struct nfs_lockt_args arg = {
1da177e4 3101 .fh = NFS_FH(inode),
911d1aaf 3102 .fl = request,
1da177e4 3103 };
911d1aaf
TM		 3104 struct nfs_lockt_res res = {
3105 .denied = request,
1da177e4
LT		 3106 };
3107 struct rpc_message msg = {
3108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3109 .rpc_argp = &arg,
3110 .rpc_resp = &res,
3111 .rpc_cred = state->owner->so_cred,
3112 };
1da177e4
LT		 3113 struct nfs4_lock_state *lsp;
3114 int status;
3115
3116 down_read(&clp->cl_sem);
911d1aaf 3117 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3118 status = nfs4_set_lock_state(state, request);
3119 if (status != 0)
3120 goto out;
3121 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3122 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3123 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3124 switch (status) {
3125 case 0:
3126 request->fl_type = F_UNLCK;
3127 break;
3128 case -NFS4ERR_DENIED:
3129 status = 0;
1da177e4 3130 }
70cc6487 3131 request->fl_ops->fl_release_private(request);
8d0a8a9d 3132out:
1da177e4
LT		 3133 up_read(&clp->cl_sem);
3134 return status;
3135}
3136
3137static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3138{
3139 struct nfs4_exception exception = { };
3140 int err;
3141
3142 do {
3143 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3144 _nfs4_proc_getlk(state, cmd, request),
3145 &exception);
3146 } while (exception.retry);
3147 return err;
3148}
3149
3150static int do_vfs_lock(struct file *file, struct file_lock *fl)
3151{
3152 int res = 0;
3153 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3154 case FL_POSIX:
3155 res = posix_lock_file_wait(file, fl);
3156 break;
3157 case FL_FLOCK:
3158 res = flock_lock_file_wait(file, fl);
3159 break;
3160 default:
3161 BUG();
3162 }
1da177e4
LT		 3163 return res;
3164}
3165
faf5f49c 3166struct nfs4_unlockdata {
911d1aaf
TM		 3167 struct nfs_locku_args arg;
3168 struct nfs_locku_res res;
faf5f49c
TM		 3169 struct nfs4_lock_state *lsp;
3170 struct nfs_open_context *ctx;
911d1aaf
TM		 3171 struct file_lock fl;
3172 const struct nfs_server *server;
26e976a8 3173 unsigned long timestamp;
faf5f49c
TM		 3174};
3175
911d1aaf
TM		 3176static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3177 struct nfs_open_context *ctx,
3178 struct nfs4_lock_state *lsp,
3179 struct nfs_seqid *seqid)
3180{
3181 struct nfs4_unlockdata *p;
3182 struct inode *inode = lsp->ls_state->inode;
3183
3184 p = kmalloc(sizeof(*p), GFP_KERNEL);
3185 if (p == NULL)
3186 return NULL;
3187 p->arg.fh = NFS_FH(inode);
3188 p->arg.fl = &p->fl;
3189 p->arg.seqid = seqid;
3190 p->arg.stateid = &lsp->ls_stateid;
3191 p->lsp = lsp;
3192 atomic_inc(&lsp->ls_count);
3193 /* Ensure we don't close file until we're done freeing locks! */
3194 p->ctx = get_nfs_open_context(ctx);
3195 memcpy(&p->fl, fl, sizeof(p->fl));
3196 p->server = NFS_SERVER(inode);
3197 return p;
3198}
3199
06f814a3 3200static void nfs4_locku_release_calldata(void *data)
faf5f49c 3201{
963d8fe5 3202 struct nfs4_unlockdata *calldata = data;
911d1aaf 3203 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3204 nfs4_put_lock_state(calldata->lsp);
3205 put_nfs_open_context(calldata->ctx);
3206 kfree(calldata);
faf5f49c
TM		 3207}
3208
963d8fe5 3209static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3210{
963d8fe5 3211 struct nfs4_unlockdata *calldata = data;
faf5f49c 3212
06f814a3
TM		 3213 if (RPC_ASSASSINATED(task))
3214 return;
911d1aaf 3215 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3216 switch (task->tk_status) {
3217 case 0:
3218 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3219 calldata->res.stateid.data,
faf5f49c 3220 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3221 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3222 break;
3223 case -NFS4ERR_STALE_STATEID:
3224 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3225 break;
3226 default:
a6a352e9 3227 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3228 rpc_restart_call(task);
faf5f49c 3229 }
faf5f49c
TM		 3230}
3231
4ce70ada 3232static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3233{
4ce70ada 3234 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3235 struct rpc_message msg = {
3236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3237 .rpc_argp = &calldata->arg,
3238 .rpc_resp = &calldata->res,
3239 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3240 };
faf5f49c 3241
911d1aaf 3242 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3243 return;
3244 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3245 /* Note: exit _without_ running nfs4_locku_done */
3246 task->tk_action = NULL;
faf5f49c
TM		 3247 return;
3248 }
26e976a8 3249 calldata->timestamp = jiffies;
faf5f49c
TM		 3250 rpc_call_setup(task, &msg, 0);
3251}
3252
963d8fe5 3253static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3254 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3255 .rpc_call_done = nfs4_locku_done,
06f814a3 3256 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3257};
3258
a5d16a4d
TM		 3259static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3260 struct nfs_open_context *ctx,
3261 struct nfs4_lock_state *lsp,
3262 struct nfs_seqid *seqid)
3263{
3264 struct nfs4_unlockdata *data;
a5d16a4d 3265
137d6aca
FF		 3266 /* Ensure this is an unlock - when canceling a lock, the
3267 * canceled lock is passed in, and it won't be an unlock.
3268 */
3269 fl->fl_type = F_UNLCK;
3270
a5d16a4d
TM		 3271 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3272 if (data == NULL) {
3273 nfs_free_seqid(seqid);
3274 return ERR_PTR(-ENOMEM);
3275 }
3276
7a1218a2 3277 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM		 3278}
3279
faf5f49c
TM		 3280static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3281{
911d1aaf 3282 struct nfs_seqid *seqid;
1da177e4 3283 struct nfs4_lock_state *lsp;
06f814a3
TM		 3284 struct rpc_task *task;
3285 int status = 0;
faf5f49c 3286
8d0a8a9d 3287 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3288 /* Unlock _before_ we do the RPC call */
3289 request->fl_flags |= FL_EXISTS;
3290 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3291 goto out;
8d0a8a9d 3292 if (status != 0)
9b073574
TM		 3293 goto out;
3294 /* Is this a delegated lock? */
3295 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3296 goto out;
8d0a8a9d 3297 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3298 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3299 status = -ENOMEM;
911d1aaf 3300 if (seqid == NULL)
9b073574 3301 goto out;
cd3758e3 3302 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3303 status = PTR_ERR(task);
3304 if (IS_ERR(task))
9b073574 3305 goto out;
a5d16a4d 3306 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3307 rpc_put_task(task);
9b073574 3308out:
1da177e4
LT		 3309 return status;
3310}
3311
a5d16a4d
TM		 3312struct nfs4_lockdata {
3313 struct nfs_lock_args arg;
3314 struct nfs_lock_res res;
3315 struct nfs4_lock_state *lsp;
3316 struct nfs_open_context *ctx;
3317 struct file_lock fl;
26e976a8 3318 unsigned long timestamp;
a5d16a4d
TM		 3319 int rpc_status;
3320 int cancelled;
3321};
3322
3323static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3324 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3325{
a5d16a4d
TM		 3326 struct nfs4_lockdata *p;
3327 struct inode *inode = lsp->ls_state->inode;
1da177e4 3328 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3329
3330 p = kzalloc(sizeof(*p), GFP_KERNEL);
3331 if (p == NULL)
3332 return NULL;
3333
3334 p->arg.fh = NFS_FH(inode);
3335 p->arg.fl = &p->fl;
3336 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3337 if (p->arg.lock_seqid == NULL)
3338 goto out_free;
3339 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3340 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3341 p->arg.lock_owner.id = lsp->ls_id.id;
a5d16a4d
TM		 3342 p->lsp = lsp;
3343 atomic_inc(&lsp->ls_count);
3344 p->ctx = get_nfs_open_context(ctx);
3345 memcpy(&p->fl, fl, sizeof(p->fl));
3346 return p;
3347out_free:
3348 kfree(p);
3349 return NULL;
3350}
3351
3352static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3353{
3354 struct nfs4_lockdata *data = calldata;
3355 struct nfs4_state *state = data->lsp->ls_state;
3356 struct nfs4_state_owner *sp = state->owner;
1da177e4 3357 struct rpc_message msg = {
a5d16a4d
TM		 3358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3359 .rpc_argp = &data->arg,
3360 .rpc_resp = &data->res,
3361 .rpc_cred = sp->so_cred,
1da177e4 3362 };
06735b34 3363
a5d16a4d
TM		 3364 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3365 return;
3366 dprintk("%s: begin!\n", __FUNCTION__);
3367 /* Do we need to do an open_to_lock_owner? */
3368 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3369 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3370 if (data->arg.open_seqid == NULL) {
3371 data->rpc_status = -ENOMEM;
3372 task->tk_action = NULL;
06735b34 3373 goto out;
8d0a8a9d 3374 }
a5d16a4d
TM		 3375 data->arg.open_stateid = &state->stateid;
3376 data->arg.new_lock_owner = 1;
3377 }
26e976a8 3378 data->timestamp = jiffies;
a5d16a4d 3379 rpc_call_setup(task, &msg, 0);
06735b34 3380out:
a5d16a4d
TM		 3381 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3382}
3383
3384static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3385{
3386 struct nfs4_lockdata *data = calldata;
3387
3388 dprintk("%s: begin!\n", __FUNCTION__);
3389
3390 data->rpc_status = task->tk_status;
3391 if (RPC_ASSASSINATED(task))
3392 goto out;
3393 if (data->arg.new_lock_owner != 0) {
3394 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3395 if (data->rpc_status == 0)
3396 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3397 else
3398 goto out;
3399 }
3400 if (data->rpc_status == 0) {
3401 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3402 sizeof(data->lsp->ls_stateid.data));
3403 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3404 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3405 }
3406 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3407out:
3408 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3409}
3410
3411static void nfs4_lock_release(void *calldata)
3412{
3413 struct nfs4_lockdata *data = calldata;
3414
3415 dprintk("%s: begin!\n", __FUNCTION__);
3416 if (data->arg.open_seqid != NULL)
3417 nfs_free_seqid(data->arg.open_seqid);
3418 if (data->cancelled != 0) {
3419 struct rpc_task *task;
3420 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3421 data->arg.lock_seqid);
3422 if (!IS_ERR(task))
e6b3c4db 3423 rpc_put_task(task);
a5d16a4d
TM		 3424 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3425 } else
3426 nfs_free_seqid(data->arg.lock_seqid);
3427 nfs4_put_lock_state(data->lsp);
3428 put_nfs_open_context(data->ctx);
3429 kfree(data);
3430 dprintk("%s: done!\n", __FUNCTION__);
3431}
3432
3433static const struct rpc_call_ops nfs4_lock_ops = {
3434 .rpc_call_prepare = nfs4_lock_prepare,
3435 .rpc_call_done = nfs4_lock_done,
3436 .rpc_release = nfs4_lock_release,
3437};
3438
3439static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3440{
3441 struct nfs4_lockdata *data;
3442 struct rpc_task *task;
3443 int ret;
3444
3445 dprintk("%s: begin!\n", __FUNCTION__);
cd3758e3 3446 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3447 fl->fl_u.nfs4_fl.owner);
3448 if (data == NULL)
3449 return -ENOMEM;
3450 if (IS_SETLKW(cmd))
3451 data->arg.block = 1;
3452 if (reclaim != 0)
3453 data->arg.reclaim = 1;
3454 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3455 &nfs4_lock_ops, data);
7a1218a2 3456 if (IS_ERR(task))
a5d16a4d 3457 return PTR_ERR(task);
a5d16a4d
TM		 3458 ret = nfs4_wait_for_completion_rpc_task(task);
3459 if (ret == 0) {
3460 ret = data->rpc_status;
3461 if (ret == -NFS4ERR_DENIED)
3462 ret = -EAGAIN;
3463 } else
3464 data->cancelled = 1;
e6b3c4db 3465 rpc_put_task(task);
a5d16a4d
TM		 3466 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3467 return ret;
1da177e4
LT		 3468}
3469
3470static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3471{
202b50dc
TM		 3472 struct nfs_server *server = NFS_SERVER(state->inode);
3473 struct nfs4_exception exception = { };
3474 int err;
3475
3476 do {
42a2d13e
TM		 3477 /* Cache the lock if possible... */
3478 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3479 return 0;
202b50dc
TM		 3480 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3481 if (err != -NFS4ERR_DELAY)
3482 break;
3483 nfs4_handle_exception(server, err, &exception);
3484 } while (exception.retry);
3485 return err;
1da177e4
LT		 3486}
3487
3488static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3489{
202b50dc
TM		 3490 struct nfs_server *server = NFS_SERVER(state->inode);
3491 struct nfs4_exception exception = { };
3492 int err;
3493
6bfc93ef
TM		 3494 err = nfs4_set_lock_state(state, request);
3495 if (err != 0)
3496 return err;
202b50dc 3497 do {
42a2d13e
TM		 3498 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3499 return 0;
202b50dc
TM		 3500 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3501 if (err != -NFS4ERR_DELAY)
3502 break;
3503 nfs4_handle_exception(server, err, &exception);
3504 } while (exception.retry);
3505 return err;
1da177e4
LT		 3506}
3507
3508static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3509{
adfa6f98 3510 struct nfs_client *clp = state->owner->so_client;
01c3b861 3511 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3512 int status;
3513
6bfc93ef 3514 /* Is this a delegated open? */
6bfc93ef
TM		 3515 status = nfs4_set_lock_state(state, request);
3516 if (status != 0)
3517 goto out;
01c3b861
TM		 3518 request->fl_flags |= FL_ACCESS;
3519 status = do_vfs_lock(request->fl_file, request);
3520 if (status < 0)
3521 goto out;
3522 down_read(&clp->cl_sem);
3523 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3524 struct nfs_inode *nfsi = NFS_I(state->inode);
3525 /* Yes: cache locks! */
3526 down_read(&nfsi->rwsem);
3527 /* ...but avoid races with delegation recall... */
3528 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3529 request->fl_flags = fl_flags & ~FL_SLEEP;
3530 status = do_vfs_lock(request->fl_file, request);
3531 up_read(&nfsi->rwsem);
3532 goto out_unlock;
3533 }
3534 up_read(&nfsi->rwsem);
3535 }
6bfc93ef
TM		 3536 status = _nfs4_do_setlk(state, cmd, request, 0);
3537 if (status != 0)
01c3b861 3538 goto out_unlock;
6bfc93ef 3539 /* Note: we always want to sleep here! */
01c3b861 3540 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3541 if (do_vfs_lock(request->fl_file, request) < 0)
3542 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3543out_unlock:
1da177e4 3544 up_read(&clp->cl_sem);
01c3b861
TM		 3545out:
3546 request->fl_flags = fl_flags;
1da177e4
LT		 3547 return status;
3548}
3549
3550static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3551{
3552 struct nfs4_exception exception = { };
3553 int err;
3554
3555 do {
3556 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3557 _nfs4_proc_setlk(state, cmd, request),
3558 &exception);
3559 } while (exception.retry);
3560 return err;
3561}
3562
3563static int
3564nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3565{
3566 struct nfs_open_context *ctx;
3567 struct nfs4_state *state;
3568 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3569 int status;
3570
3571 /* verify open state */
cd3758e3 3572 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3573 state = ctx->state;
3574
3575 if (request->fl_start < 0 || request->fl_end < 0)
3576 return -EINVAL;
3577
3578 if (IS_GETLK(cmd))
3579 return nfs4_proc_getlk(state, F_GETLK, request);
3580
3581 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3582 return -EINVAL;
3583
3584 if (request->fl_type == F_UNLCK)
3585 return nfs4_proc_unlck(state, cmd, request);
3586
3587 do {
3588 status = nfs4_proc_setlk(state, cmd, request);
3589 if ((status != -EAGAIN) || IS_SETLK(cmd))
3590 break;
3591 timeout = nfs4_set_lock_task_retry(timeout);
3592 status = -ERESTARTSYS;
3593 if (signalled())
3594 break;
3595 } while(status < 0);
1da177e4
LT		 3596 return status;
3597}
3598
888e694c
TM		 3599int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3600{
3601 struct nfs_server *server = NFS_SERVER(state->inode);
3602 struct nfs4_exception exception = { };
3603 int err;
3604
3605 err = nfs4_set_lock_state(state, fl);
3606 if (err != 0)
3607 goto out;
3608 do {
3609 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3610 if (err != -NFS4ERR_DELAY)
3611 break;
3612 err = nfs4_handle_exception(server, err, &exception);
3613 } while (exception.retry);
3614out:
3615 return err;
3616}
6b3b5496 3617
aa1870af
BF		 3618#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3619
6b3b5496
BF		 3620int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3621 size_t buflen, int flags)
3622{
4b580ee3
BF		 3623 struct inode *inode = dentry->d_inode;
3624
3625 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3626 return -EOPNOTSUPP;
3627
3628 if (!S_ISREG(inode->i_mode) &&
3629 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3630 return -EPERM;
3631
3632 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3633}
3634
3635/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3636 * and that's what we'll do for e.g. user attributes that haven't been set.
3637 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3638 * attributes in kernel-managed attribute namespaces. */
3639ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3640 size_t buflen)
3641{
aa1870af
BF		 3642 struct inode *inode = dentry->d_inode;
3643
3644 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3645 return -EOPNOTSUPP;
3646
3647 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3648}
3649
3650ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3651{
aa1870af 3652 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3653
096455a2
BF		 3654 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3655 return 0;
6b3b5496
BF		 3656 if (buf && buflen < len)
3657 return -ERANGE;
3658 if (buf)
aa1870af
BF		 3659 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3660 return len;
6b3b5496
BF		 3661}
3662
56659e99 3663int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3664 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3665{
3666 struct nfs_server *server = NFS_SERVER(dir);
3667 u32 bitmask[2] = {
361e624f
MN		 3668 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3669 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3670 };
3671 struct nfs4_fs_locations_arg args = {
3672 .dir_fh = NFS_FH(dir),
c228fd3a 3673 .name = name,
683b57b4
TM		 3674 .page = page,
3675 .bitmask = bitmask,
3676 };
3677 struct rpc_message msg = {
3678 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3679 .rpc_argp = &args,
7aaa0b3b 3680 .rpc_resp = fs_locations,
683b57b4
TM		 3681 };
3682 int status;
3683
3684 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3685 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3686 fs_locations->server = server;
830b8e33 3687 fs_locations->nlocations = 0;
683b57b4
TM		 3688 status = rpc_call_sync(server->client, &msg, 0);
3689 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3690 return status;
3691}
3692
1da177e4
LT		 3693struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3694 .recover_open = nfs4_open_reclaim,
3695 .recover_lock = nfs4_lock_reclaim,
3696};
3697
3698struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3699 .recover_open = nfs4_open_expired,
3700 .recover_lock = nfs4_lock_expired,
3701};
3702
92e1d5be 3703static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3704 .permission = nfs_permission,
3705 .getattr = nfs_getattr,
3706 .setattr = nfs_setattr,
3707 .getxattr = nfs4_getxattr,
3708 .setxattr = nfs4_setxattr,
3709 .listxattr = nfs4_listxattr,
3710};
3711
509de811 3712const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3713 .version = 4, /* protocol version */
3714 .dentry_ops = &nfs4_dentry_operations,
3715 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3716 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3717 .getroot = nfs4_proc_get_root,
3718 .getattr = nfs4_proc_getattr,
3719 .setattr = nfs4_proc_setattr,
2b3de441 3720 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3721 .lookup = nfs4_proc_lookup,
3722 .access = nfs4_proc_access,
3723 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3724 .create = nfs4_proc_create,
3725 .remove = nfs4_proc_remove,
3726 .unlink_setup = nfs4_proc_unlink_setup,
3727 .unlink_done = nfs4_proc_unlink_done,
3728 .rename = nfs4_proc_rename,
3729 .link = nfs4_proc_link,
3730 .symlink = nfs4_proc_symlink,
3731 .mkdir = nfs4_proc_mkdir,
3732 .rmdir = nfs4_proc_remove,
3733 .readdir = nfs4_proc_readdir,
3734 .mknod = nfs4_proc_mknod,
3735 .statfs = nfs4_proc_statfs,
3736 .fsinfo = nfs4_proc_fsinfo,
3737 .pathconf = nfs4_proc_pathconf,
e9326dca 3738 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3739 .decode_dirent = nfs4_decode_dirent,
3740 .read_setup = nfs4_proc_read_setup,
ec06c096 3741 .read_done = nfs4_read_done,
1da177e4 3742 .write_setup = nfs4_proc_write_setup,
788e7a89 3743 .write_done = nfs4_write_done,
1da177e4 3744 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3745 .commit_done = nfs4_commit_done,
02a913a7
TM		 3746 .file_open = nfs_open,
3747 .file_release = nfs_release,
1da177e4 3748 .lock = nfs4_proc_lock,
e50a1c2e 3749 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3750};
3751
3752/*
3753 * Local variables:
3754 * c-basic-offset: 8
3755 * End:
3756 */
Linux 6.x block layer and io_uring tree(s)