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NFS: Add a server capabilities NFS RPC op
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
006ea73e 54#include "iostat.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
58#define NFS4_POLL_RETRY_MIN (1*HZ)
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 *);
1da177e4 65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
faf5f49c 66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
adfa6f98 67static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
1da177e4 68
1da177e4
LT		 69/* Prevent leaks of NFSv4 errors into userland */
70int nfs4_map_errors(int err)
71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
74 __FUNCTION__, -err);
75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
830b8e33
MN		 122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
1da177e4
LT		 141static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
142 struct nfs4_readdir_arg *readdir)
143{
144 u32 *start, *p;
145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
b7ef1956 148 readdir->cookie = cookie;
1da177e4
LT		 149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
165 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
26e976a8 196static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 197{
7539bbab 198 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 199 spin_lock(&clp->cl_lock);
200 if (time_before(clp->cl_last_renewal,timestamp))
201 clp->cl_last_renewal = timestamp;
202 spin_unlock(&clp->cl_lock);
203}
204
38478b24 205static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 206{
38478b24 207 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 208
38478b24
TM		 209 spin_lock(&dir->i_lock);
210 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
1da177e4
LT		 211 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
212 nfsi->change_attr = cinfo->after;
38478b24 213 spin_unlock(&dir->i_lock);
1da177e4
LT		 214}
215
e56e0b78 216struct nfs4_opendata {
24ac23ab 217 atomic_t count;
e56e0b78
TM		 218 struct nfs_openargs o_arg;
219 struct nfs_openres o_res;
cdd4e68b
TM		 220 struct nfs_open_confirmargs c_arg;
221 struct nfs_open_confirmres c_res;
e56e0b78
TM		 222 struct nfs_fattr f_attr;
223 struct nfs_fattr dir_attr;
224 struct dentry *dentry;
225 struct dentry *dir;
226 struct nfs4_state_owner *owner;
227 struct iattr attrs;
26e976a8 228 unsigned long timestamp;
24ac23ab
TM		 229 int rpc_status;
230 int cancelled;
e56e0b78
TM		 231};
232
233static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
234 struct nfs4_state_owner *sp, int flags,
235 const struct iattr *attrs)
236{
237 struct dentry *parent = dget_parent(dentry);
238 struct inode *dir = parent->d_inode;
239 struct nfs_server *server = NFS_SERVER(dir);
240 struct nfs4_opendata *p;
241
242 p = kzalloc(sizeof(*p), GFP_KERNEL);
243 if (p == NULL)
244 goto err;
245 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
246 if (p->o_arg.seqid == NULL)
247 goto err_free;
24ac23ab 248 atomic_set(&p->count, 1);
e56e0b78
TM		 249 p->dentry = dget(dentry);
250 p->dir = parent;
251 p->owner = sp;
252 atomic_inc(&sp->so_count);
253 p->o_arg.fh = NFS_FH(dir);
254 p->o_arg.open_flags = flags,
7539bbab 255 p->o_arg.clientid = server->nfs_client->cl_clientid;
e56e0b78
TM		 256 p->o_arg.id = sp->so_id;
257 p->o_arg.name = &dentry->d_name;
258 p->o_arg.server = server;
259 p->o_arg.bitmask = server->attr_bitmask;
260 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
261 p->o_res.f_attr = &p->f_attr;
262 p->o_res.dir_attr = &p->dir_attr;
263 p->o_res.server = server;
264 nfs_fattr_init(&p->f_attr);
265 nfs_fattr_init(&p->dir_attr);
266 if (flags & O_EXCL) {
267 u32 *s = (u32 *) p->o_arg.u.verifier.data;
268 s[0] = jiffies;
269 s[1] = current->pid;
270 } else if (flags & O_CREAT) {
271 p->o_arg.u.attrs = &p->attrs;
272 memcpy(&p->attrs, attrs, sizeof(p->attrs));
273 }
cdd4e68b
TM		 274 p->c_arg.fh = &p->o_res.fh;
275 p->c_arg.stateid = &p->o_res.stateid;
276 p->c_arg.seqid = p->o_arg.seqid;
e56e0b78
TM		 277 return p;
278err_free:
279 kfree(p);
280err:
281 dput(parent);
282 return NULL;
283}
284
285static void nfs4_opendata_free(struct nfs4_opendata *p)
286{
24ac23ab 287 if (p != NULL && atomic_dec_and_test(&p->count)) {
e56e0b78
TM		 288 nfs_free_seqid(p->o_arg.seqid);
289 nfs4_put_state_owner(p->owner);
290 dput(p->dir);
291 dput(p->dentry);
292 kfree(p);
293 }
294}
295
9512135d 296/* Helper for asynchronous RPC calls */
4ce70ada 297static int nfs4_call_async(struct rpc_clnt *clnt,
963d8fe5 298 const struct rpc_call_ops *tk_ops, void *calldata)
9512135d
TM		 299{
300 struct rpc_task *task;
301
963d8fe5 302 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
9512135d 303 return -ENOMEM;
9512135d
TM		 304 rpc_execute(task);
305 return 0;
306}
307
06f814a3
TM		 308static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
309{
310 sigset_t oldset;
311 int ret;
312
313 rpc_clnt_sigmask(task->tk_client, &oldset);
314 ret = rpc_wait_for_completion_task(task);
315 rpc_clnt_sigunmask(task->tk_client, &oldset);
316 return ret;
317}
318
e7616923
TM		 319static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
320{
321 switch (open_flags) {
322 case FMODE_WRITE:
323 state->n_wronly++;
324 break;
325 case FMODE_READ:
326 state->n_rdonly++;
327 break;
328 case FMODE_READ|FMODE_WRITE:
329 state->n_rdwr++;
330 }
331}
332
1da177e4
LT		 333static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
334{
335 struct inode *inode = state->inode;
336
337 open_flags &= (FMODE_READ|FMODE_WRITE);
d530838b 338 /* Protect against nfs4_find_state_byowner() */
ec073428 339 spin_lock(&state->owner->so_lock);
1da177e4 340 spin_lock(&inode->i_lock);
4cecb76f 341 memcpy(&state->stateid, stateid, sizeof(state->stateid));
e7616923 342 update_open_stateflags(state, open_flags);
4cecb76f 343 nfs4_state_set_mode_locked(state, state->state | open_flags);
1da177e4 344 spin_unlock(&inode->i_lock);
ec073428 345 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 346}
347
24ac23ab
TM		 348static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
349{
350 struct inode *inode;
351 struct nfs4_state *state = NULL;
352
353 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
354 goto out;
355 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
03f28e3a 356 if (IS_ERR(inode))
24ac23ab
TM		 357 goto out;
358 state = nfs4_get_open_state(inode, data->owner);
359 if (state == NULL)
360 goto put_inode;
361 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
362put_inode:
363 iput(inode);
364out:
365 return state;
366}
367
864472e9
TM		 368static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
369{
370 struct nfs_inode *nfsi = NFS_I(state->inode);
371 struct nfs_open_context *ctx;
372
373 spin_lock(&state->inode->i_lock);
374 list_for_each_entry(ctx, &nfsi->open_files, list) {
375 if (ctx->state != state)
376 continue;
377 get_nfs_open_context(ctx);
378 spin_unlock(&state->inode->i_lock);
379 return ctx;
380 }
381 spin_unlock(&state->inode->i_lock);
382 return ERR_PTR(-ENOENT);
383}
384
385static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
386{
387 int ret;
388
389 opendata->o_arg.open_flags = openflags;
390 ret = _nfs4_proc_open(opendata);
391 if (ret != 0)
392 return ret;
393 memcpy(stateid->data, opendata->o_res.stateid.data,
394 sizeof(stateid->data));
395 return 0;
396}
397
398static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
399{
400 nfs4_stateid stateid;
401 struct nfs4_state *newstate;
402 int mode = 0;
403 int delegation = 0;
404 int ret;
405
406 /* memory barrier prior to reading state->n_* */
407 smp_rmb();
408 if (state->n_rdwr != 0) {
409 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
410 if (ret != 0)
411 return ret;
412 mode |= FMODE_READ|FMODE_WRITE;
413 if (opendata->o_res.delegation_type != 0)
414 delegation = opendata->o_res.delegation_type;
415 smp_rmb();
416 }
417 if (state->n_wronly != 0) {
418 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
419 if (ret != 0)
420 return ret;
421 mode |= FMODE_WRITE;
422 if (opendata->o_res.delegation_type != 0)
423 delegation = opendata->o_res.delegation_type;
424 smp_rmb();
425 }
426 if (state->n_rdonly != 0) {
427 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
428 if (ret != 0)
429 return ret;
430 mode |= FMODE_READ;
431 }
432 clear_bit(NFS_DELEGATED_STATE, &state->flags);
433 if (mode == 0)
434 return 0;
435 if (opendata->o_res.delegation_type == 0)
436 opendata->o_res.delegation_type = delegation;
437 opendata->o_arg.open_flags |= mode;
438 newstate = nfs4_opendata_to_nfs4_state(opendata);
439 if (newstate != NULL) {
440 if (opendata->o_res.delegation_type != 0) {
441 struct nfs_inode *nfsi = NFS_I(newstate->inode);
442 int delegation_flags = 0;
443 if (nfsi->delegation)
444 delegation_flags = nfsi->delegation->flags;
445 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
446 nfs_inode_set_delegation(newstate->inode,
447 opendata->owner->so_cred,
448 &opendata->o_res);
449 else
450 nfs_inode_reclaim_delegation(newstate->inode,
451 opendata->owner->so_cred,
452 &opendata->o_res);
453 }
454 nfs4_close_state(newstate, opendata->o_arg.open_flags);
455 }
456 if (newstate != state)
457 return -ESTALE;
458 return 0;
459}
460
1da177e4
LT		 461/*
462 * OPEN_RECLAIM:
463 * reclaim state on the server after a reboot.
1da177e4 464 */
864472e9 465static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4 466{
864472e9
TM		 467 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
468 struct nfs4_opendata *opendata;
469 int delegation_type = 0;
1da177e4
LT		 470 int status;
471
472 if (delegation != NULL) {
473 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
474 memcpy(&state->stateid, &delegation->stateid,
475 sizeof(state->stateid));
476 set_bit(NFS_DELEGATED_STATE, &state->flags);
477 return 0;
478 }
864472e9 479 delegation_type = delegation->type;
1da177e4 480 }
864472e9
TM		 481 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
482 if (opendata == NULL)
cee54fc9 483 return -ENOMEM;
864472e9
TM		 484 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
485 opendata->o_arg.fh = NFS_FH(state->inode);
486 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
487 opendata->o_arg.u.delegation_type = delegation_type;
488 status = nfs4_open_recover(opendata, state);
489 nfs4_opendata_free(opendata);
1da177e4
LT		 490 return status;
491}
492
864472e9 493static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4
LT		 494{
495 struct nfs_server *server = NFS_SERVER(state->inode);
496 struct nfs4_exception exception = { };
497 int err;
498 do {
864472e9 499 err = _nfs4_do_open_reclaim(sp, state, dentry);
202b50dc
TM		 500 if (err != -NFS4ERR_DELAY)
501 break;
502 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 503 } while (exception.retry);
504 return err;
505}
506
864472e9
TM		 507static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
508{
509 struct nfs_open_context *ctx;
510 int ret;
511
512 ctx = nfs4_state_find_open_context(state);
513 if (IS_ERR(ctx))
514 return PTR_ERR(ctx);
515 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
516 put_nfs_open_context(ctx);
517 return ret;
518}
519
1da177e4
LT		 520static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
521{
522 struct nfs4_state_owner *sp = state->owner;
e56e0b78 523 struct nfs4_opendata *opendata;
864472e9 524 int ret;
1da177e4 525
1da177e4 526 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
864472e9
TM		 527 return 0;
528 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
e56e0b78 529 if (opendata == NULL)
864472e9 530 return -ENOMEM;
e56e0b78 531 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
e56e0b78
TM		 532 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
533 sizeof(opendata->o_arg.u.delegation.data));
864472e9 534 ret = nfs4_open_recover(opendata, state);
e56e0b78 535 nfs4_opendata_free(opendata);
864472e9 536 return ret;
1da177e4
LT		 537}
538
539int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
540{
541 struct nfs4_exception exception = { };
542 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
543 int err;
544 do {
545 err = _nfs4_open_delegation_recall(dentry, state);
546 switch (err) {
547 case 0:
548 return err;
549 case -NFS4ERR_STALE_CLIENTID:
550 case -NFS4ERR_STALE_STATEID:
551 case -NFS4ERR_EXPIRED:
552 /* Don't recall a delegation if it was lost */
7539bbab 553 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 554 return err;
555 }
556 err = nfs4_handle_exception(server, err, &exception);
557 } while (exception.retry);
558 return err;
559}
560
cdd4e68b 561static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 562{
cdd4e68b
TM		 563 struct nfs4_opendata *data = calldata;
564 struct rpc_message msg = {
565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
566 .rpc_argp = &data->c_arg,
567 .rpc_resp = &data->c_res,
568 .rpc_cred = data->owner->so_cred,
1da177e4 569 };
26e976a8 570 data->timestamp = jiffies;
cdd4e68b
TM		 571 rpc_call_setup(task, &msg, 0);
572}
573
574static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
575{
576 struct nfs4_opendata *data = calldata;
577
578 data->rpc_status = task->tk_status;
579 if (RPC_ASSASSINATED(task))
580 return;
26e976a8 581 if (data->rpc_status == 0) {
cdd4e68b
TM		 582 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
583 sizeof(data->o_res.stateid.data));
26e976a8
TM		 584 renew_lease(data->o_res.server, data->timestamp);
585 }
cdd4e68b
TM		 586 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
587 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
588}
589
590static void nfs4_open_confirm_release(void *calldata)
591{
592 struct nfs4_opendata *data = calldata;
593 struct nfs4_state *state = NULL;
594
595 /* If this request hasn't been cancelled, do nothing */
596 if (data->cancelled == 0)
597 goto out_free;
598 /* In case of error, no cleanup! */
599 if (data->rpc_status != 0)
600 goto out_free;
601 nfs_confirm_seqid(&data->owner->so_seqid, 0);
602 state = nfs4_opendata_to_nfs4_state(data);
603 if (state != NULL)
604 nfs4_close_state(state, data->o_arg.open_flags);
605out_free:
606 nfs4_opendata_free(data);
607}
608
609static const struct rpc_call_ops nfs4_open_confirm_ops = {
610 .rpc_call_prepare = nfs4_open_confirm_prepare,
611 .rpc_call_done = nfs4_open_confirm_done,
612 .rpc_release = nfs4_open_confirm_release,
613};
614
615/*
616 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
617 */
618static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
619{
620 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
621 struct rpc_task *task;
1da177e4
LT		 622 int status;
623
cdd4e68b 624 atomic_inc(&data->count);
7a1218a2
TM		 625 /*
626 * If rpc_run_task() ends up calling ->rpc_release(), we
627 * want to ensure that it takes the 'error' code path.
628 */
629 data->rpc_status = -ENOMEM;
cdd4e68b 630 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
7a1218a2 631 if (IS_ERR(task))
cdd4e68b 632 return PTR_ERR(task);
cdd4e68b
TM		 633 status = nfs4_wait_for_completion_rpc_task(task);
634 if (status != 0) {
635 data->cancelled = 1;
636 smp_wmb();
637 } else
638 status = data->rpc_status;
639 rpc_release_task(task);
1da177e4
LT		 640 return status;
641}
642
24ac23ab 643static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 644{
24ac23ab
TM		 645 struct nfs4_opendata *data = calldata;
646 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 647 struct rpc_message msg = {
648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 649 .rpc_argp = &data->o_arg,
650 .rpc_resp = &data->o_res,
1da177e4
LT		 651 .rpc_cred = sp->so_cred,
652 };
24ac23ab
TM		 653
654 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
655 return;
656 /* Update sequence id. */
657 data->o_arg.id = sp->so_id;
658 data->o_arg.clientid = sp->so_client->cl_clientid;
864472e9
TM		 659 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
660 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
26e976a8 661 data->timestamp = jiffies;
24ac23ab
TM		 662 rpc_call_setup(task, &msg, 0);
663}
1da177e4 664
24ac23ab
TM		 665static void nfs4_open_done(struct rpc_task *task, void *calldata)
666{
667 struct nfs4_opendata *data = calldata;
1da177e4 668
24ac23ab
TM		 669 data->rpc_status = task->tk_status;
670 if (RPC_ASSASSINATED(task))
671 return;
672 if (task->tk_status == 0) {
673 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 674 case S_IFREG:
675 break;
676 case S_IFLNK:
24ac23ab 677 data->rpc_status = -ELOOP;
6f926b5b
TM		 678 break;
679 case S_IFDIR:
24ac23ab 680 data->rpc_status = -EISDIR;
6f926b5b
TM		 681 break;
682 default:
24ac23ab 683 data->rpc_status = -ENOTDIR;
6f926b5b 684 }
26e976a8 685 renew_lease(data->o_res.server, data->timestamp);
6f926b5b 686 }
24ac23ab
TM		 687 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
688}
6f926b5b 689
24ac23ab
TM		 690static void nfs4_open_release(void *calldata)
691{
692 struct nfs4_opendata *data = calldata;
693 struct nfs4_state *state = NULL;
694
695 /* If this request hasn't been cancelled, do nothing */
696 if (data->cancelled == 0)
697 goto out_free;
698 /* In case of error, no cleanup! */
699 if (data->rpc_status != 0)
700 goto out_free;
701 /* In case we need an open_confirm, no cleanup! */
702 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
703 goto out_free;
704 nfs_confirm_seqid(&data->owner->so_seqid, 0);
705 state = nfs4_opendata_to_nfs4_state(data);
706 if (state != NULL)
707 nfs4_close_state(state, data->o_arg.open_flags);
708out_free:
709 nfs4_opendata_free(data);
710}
711
712static const struct rpc_call_ops nfs4_open_ops = {
713 .rpc_call_prepare = nfs4_open_prepare,
714 .rpc_call_done = nfs4_open_done,
715 .rpc_release = nfs4_open_release,
716};
717
718/*
719 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
720 */
721static int _nfs4_proc_open(struct nfs4_opendata *data)
722{
723 struct inode *dir = data->dir->d_inode;
724 struct nfs_server *server = NFS_SERVER(dir);
725 struct nfs_openargs *o_arg = &data->o_arg;
726 struct nfs_openres *o_res = &data->o_res;
727 struct rpc_task *task;
728 int status;
729
730 atomic_inc(&data->count);
7a1218a2
TM		 731 /*
732 * If rpc_run_task() ends up calling ->rpc_release(), we
733 * want to ensure that it takes the 'error' code path.
734 */
735 data->rpc_status = -ENOMEM;
24ac23ab 736 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
7a1218a2 737 if (IS_ERR(task))
24ac23ab 738 return PTR_ERR(task);
24ac23ab
TM		 739 status = nfs4_wait_for_completion_rpc_task(task);
740 if (status != 0) {
741 data->cancelled = 1;
742 smp_wmb();
743 } else
744 status = data->rpc_status;
745 rpc_release_task(task);
1da177e4 746 if (status != 0)
24ac23ab
TM		 747 return status;
748
56ae19f3
TM		 749 if (o_arg->open_flags & O_CREAT) {
750 update_changeattr(dir, &o_res->cinfo);
751 nfs_post_op_update_inode(dir, o_res->dir_attr);
752 } else
753 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 754 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 755 status = _nfs4_proc_open_confirm(data);
1da177e4 756 if (status != 0)
24ac23ab 757 return status;
1da177e4 758 }
24ac23ab 759 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1da177e4 760 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
24ac23ab
TM		 761 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
762 return 0;
1da177e4
LT		 763}
764
765static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
766{
767 struct nfs_access_entry cache;
768 int mask = 0;
769 int status;
770
771 if (openflags & FMODE_READ)
772 mask |= MAY_READ;
773 if (openflags & FMODE_WRITE)
774 mask |= MAY_WRITE;
775 status = nfs_access_get_cached(inode, cred, &cache);
776 if (status == 0)
777 goto out;
778
779 /* Be clever: ask server to check for all possible rights */
780 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
781 cache.cred = cred;
782 cache.jiffies = jiffies;
783 status = _nfs4_proc_access(inode, &cache);
784 if (status != 0)
785 return status;
786 nfs_access_add_cache(inode, &cache);
787out:
788 if ((cache.mask & mask) == mask)
789 return 0;
790 return -EACCES;
791}
792
58d9714a
TM		 793int nfs4_recover_expired_lease(struct nfs_server *server)
794{
7539bbab 795 struct nfs_client *clp = server->nfs_client;
58d9714a
TM		 796
797 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
798 nfs4_schedule_state_recovery(clp);
799 return nfs4_wait_clnt_recover(server->client, clp);
800}
801
1da177e4
LT		 802/*
803 * OPEN_EXPIRED:
804 * reclaim state on the server after a network partition.
805 * Assumes caller holds the appropriate lock
806 */
807static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
808{
1da177e4 809 struct inode *inode = state->inode;
1da177e4 810 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
e56e0b78 811 struct nfs4_opendata *opendata;
24ac23ab 812 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
864472e9 813 int ret;
1da177e4
LT		 814
815 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
864472e9
TM		 816 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
817 if (ret < 0)
818 return ret;
1da177e4
LT		 819 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
820 set_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9 821 return 0;
1da177e4 822 }
24ac23ab 823 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
e56e0b78 824 if (opendata == NULL)
864472e9
TM		 825 return -ENOMEM;
826 ret = nfs4_open_recover(opendata, state);
827 if (ret == -ESTALE) {
828 /* Invalidate the state owner so we don't ever use it again */
829 nfs4_drop_state_owner(sp);
830 d_drop(dentry);
1da177e4 831 }
e56e0b78 832 nfs4_opendata_free(opendata);
864472e9 833 return ret;
1da177e4
LT		 834}
835
202b50dc
TM		 836static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
837{
838 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
839 struct nfs4_exception exception = { };
840 int err;
841
842 do {
843 err = _nfs4_open_expired(sp, state, dentry);
844 if (err == -NFS4ERR_DELAY)
845 nfs4_handle_exception(server, err, &exception);
846 } while (exception.retry);
847 return err;
848}
849
1da177e4
LT		 850static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
851{
1da177e4 852 struct nfs_open_context *ctx;
864472e9 853 int ret;
1da177e4 854
864472e9
TM		 855 ctx = nfs4_state_find_open_context(state);
856 if (IS_ERR(ctx))
857 return PTR_ERR(ctx);
858 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
859 put_nfs_open_context(ctx);
860 return ret;
1da177e4
LT		 861}
862
863/*
24ac23ab 864 * Returns a referenced nfs4_state if there is an open delegation on the file
1da177e4
LT		 865 */
866static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
867{
868 struct nfs_delegation *delegation;
869 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 870 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 871 struct nfs_inode *nfsi = NFS_I(inode);
872 struct nfs4_state_owner *sp = NULL;
873 struct nfs4_state *state = NULL;
874 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
875 int err;
876
b4454fe1
TM		 877 err = -ENOMEM;
878 if (!(sp = nfs4_get_state_owner(server, cred))) {
879 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
880 return err;
881 }
58d9714a
TM		 882 err = nfs4_recover_expired_lease(server);
883 if (err != 0)
b4454fe1 884 goto out_put_state_owner;
1da177e4
LT		 885 /* Protect against reboot recovery - NOTE ORDER! */
886 down_read(&clp->cl_sem);
887 /* Protect against delegation recall */
888 down_read(&nfsi->rwsem);
889 delegation = NFS_I(inode)->delegation;
890 err = -ENOENT;
891 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
892 goto out_err;
893 err = -ENOMEM;
1da177e4
LT		 894 state = nfs4_get_open_state(inode, sp);
895 if (state == NULL)
896 goto out_err;
897
898 err = -ENOENT;
899 if ((state->state & open_flags) == open_flags) {
900 spin_lock(&inode->i_lock);
e7616923 901 update_open_stateflags(state, open_flags);
1da177e4
LT		 902 spin_unlock(&inode->i_lock);
903 goto out_ok;
904 } else if (state->state != 0)
b4454fe1 905 goto out_put_open_state;
1da177e4
LT		 906
907 lock_kernel();
908 err = _nfs4_do_access(inode, cred, open_flags);
909 unlock_kernel();
910 if (err != 0)
b4454fe1 911 goto out_put_open_state;
1da177e4
LT		 912 set_bit(NFS_DELEGATED_STATE, &state->flags);
913 update_open_stateid(state, &delegation->stateid, open_flags);
914out_ok:
1da177e4
LT		 915 nfs4_put_state_owner(sp);
916 up_read(&nfsi->rwsem);
917 up_read(&clp->cl_sem);
1da177e4 918 *res = state;
b4454fe1
TM		 919 return 0;
920out_put_open_state:
921 nfs4_put_open_state(state);
1da177e4 922out_err:
1da177e4
LT		 923 up_read(&nfsi->rwsem);
924 up_read(&clp->cl_sem);
b8e5c4c2
TM		 925 if (err != -EACCES)
926 nfs_inode_return_delegation(inode);
b4454fe1
TM		 927out_put_state_owner:
928 nfs4_put_state_owner(sp);
1da177e4
LT		 929 return err;
930}
931
932static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
933{
934 struct nfs4_exception exception = { };
a162a6b8 935 struct nfs4_state *res = ERR_PTR(-EIO);
1da177e4
LT		 936 int err;
937
938 do {
939 err = _nfs4_open_delegated(inode, flags, cred, &res);
940 if (err == 0)
941 break;
942 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
943 err, &exception));
944 } while (exception.retry);
945 return res;
946}
947
948/*
24ac23ab 949 * Returns a referenced nfs4_state
1da177e4
LT		 950 */
951static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
952{
953 struct nfs4_state_owner *sp;
954 struct nfs4_state *state = NULL;
955 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 956 struct nfs_client *clp = server->nfs_client;
e56e0b78 957 struct nfs4_opendata *opendata;
1da177e4 958 int status;
1da177e4
LT		 959
960 /* Protect against reboot recovery conflicts */
1da177e4
LT		 961 status = -ENOMEM;
962 if (!(sp = nfs4_get_state_owner(server, cred))) {
963 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
964 goto out_err;
965 }
58d9714a
TM		 966 status = nfs4_recover_expired_lease(server);
967 if (status != 0)
b4454fe1 968 goto err_put_state_owner;
58d9714a
TM		 969 down_read(&clp->cl_sem);
970 status = -ENOMEM;
e56e0b78
TM		 971 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
972 if (opendata == NULL)
76723de0 973 goto err_release_rwsem;
1da177e4 974
24ac23ab 975 status = _nfs4_proc_open(opendata);
1da177e4 976 if (status != 0)
e56e0b78 977 goto err_opendata_free;
1da177e4
LT		 978
979 status = -ENOMEM;
24ac23ab
TM		 980 state = nfs4_opendata_to_nfs4_state(opendata);
981 if (state == NULL)
e56e0b78 982 goto err_opendata_free;
e56e0b78 983 if (opendata->o_res.delegation_type != 0)
24ac23ab 984 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
e56e0b78 985 nfs4_opendata_free(opendata);
1da177e4
LT		 986 nfs4_put_state_owner(sp);
987 up_read(&clp->cl_sem);
988 *res = state;
989 return 0;
e56e0b78
TM		 990err_opendata_free:
991 nfs4_opendata_free(opendata);
76723de0
TM		 992err_release_rwsem:
993 up_read(&clp->cl_sem);
e56e0b78
TM		 994err_put_state_owner:
995 nfs4_put_state_owner(sp);
1da177e4 996out_err:
1da177e4
LT		 997 *res = NULL;
998 return status;
999}
1000
1001
1002static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
1003{
1004 struct nfs4_exception exception = { };
1005 struct nfs4_state *res;
1006 int status;
1007
1008 do {
1009 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
1010 if (status == 0)
1011 break;
1012 /* NOTE: BAD_SEQID means the server and client disagree about the
1013 * book-keeping w.r.t. state-changing operations
1014 * (OPEN/CLOSE/LOCK/LOCKU...)
1015 * It is actually a sign of a bug on the client or on the server.
1016 *
1017 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1018 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1019 * have unhashed the old state_owner for us, and that we can
1020 * therefore safely retry using a new one. We should still warn
1021 * the user though...
1022 */
1023 if (status == -NFS4ERR_BAD_SEQID) {
1024 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1025 exception.retry = 1;
1026 continue;
1027 }
550f5747
TM		 1028 /*
1029 * BAD_STATEID on OPEN means that the server cancelled our
1030 * state before it received the OPEN_CONFIRM.
1031 * Recover by retrying the request as per the discussion
1032 * on Page 181 of RFC3530.
1033 */
1034 if (status == -NFS4ERR_BAD_STATEID) {
1035 exception.retry = 1;
1036 continue;
1037 }
1da177e4
LT		 1038 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1039 status, &exception));
1040 } while (exception.retry);
1041 return res;
1042}
1043
3e4f6290
TM		 1044static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1045 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1046{
3e4f6290 1047 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1048 struct nfs_setattrargs arg = {
3e4f6290 1049 .fh = NFS_FH(inode),
1da177e4
LT		 1050 .iap = sattr,
1051 .server = server,
1052 .bitmask = server->attr_bitmask,
1053 };
1054 struct nfs_setattrres res = {
1055 .fattr = fattr,
1056 .server = server,
1057 };
1058 struct rpc_message msg = {
1059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1060 .rpc_argp = &arg,
1061 .rpc_resp = &res,
1062 };
26e976a8 1063 unsigned long timestamp = jiffies;
65e4308d 1064 int status;
1da177e4 1065
0e574af1 1066 nfs_fattr_init(fattr);
1da177e4 1067
3e4f6290
TM		 1068 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1069 /* Use that stateid */
1070 } else if (state != NULL) {
1da177e4 1071 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1072 nfs4_copy_stateid(&arg.stateid, state, current->files);
1073 } else
1da177e4
LT		 1074 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1075
65e4308d 1076 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1077 if (status == 0 && state != NULL)
1078 renew_lease(server, timestamp);
65e4308d 1079 return status;
1da177e4
LT		 1080}
1081
3e4f6290
TM		 1082static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1083 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1084{
3e4f6290 1085 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1086 struct nfs4_exception exception = { };
1087 int err;
1088 do {
1089 err = nfs4_handle_exception(server,
3e4f6290 1090 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1091 &exception);
1092 } while (exception.retry);
1093 return err;
1094}
1095
1096struct nfs4_closedata {
1097 struct inode *inode;
1098 struct nfs4_state *state;
1099 struct nfs_closeargs arg;
1100 struct nfs_closeres res;
516a6af6 1101 struct nfs_fattr fattr;
26e976a8 1102 unsigned long timestamp;
1da177e4
LT		 1103};
1104
963d8fe5 1105static void nfs4_free_closedata(void *data)
9512135d 1106{
963d8fe5
TM		 1107 struct nfs4_closedata *calldata = data;
1108 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1109
1110 nfs4_put_open_state(calldata->state);
1111 nfs_free_seqid(calldata->arg.seqid);
9512135d 1112 nfs4_put_state_owner(sp);
9512135d
TM		 1113 kfree(calldata);
1114}
1115
963d8fe5 1116static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1117{
963d8fe5 1118 struct nfs4_closedata *calldata = data;
1da177e4 1119 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1120 struct nfs_server *server = NFS_SERVER(calldata->inode);
1121
4ce70ada
TM		 1122 if (RPC_ASSASSINATED(task))
1123 return;
1da177e4
LT		 1124 /* hmm. we are done with the inode, and in the process of freeing
1125 * the state_owner. we keep this around to process errors
1126 */
cee54fc9 1127 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1128 switch (task->tk_status) {
1129 case 0:
1130 memcpy(&state->stateid, &calldata->res.stateid,
1131 sizeof(state->stateid));
26e976a8 1132 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1133 break;
1134 case -NFS4ERR_STALE_STATEID:
1135 case -NFS4ERR_EXPIRED:
7539bbab 1136 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 1137 break;
1138 default:
1139 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1140 rpc_restart_call(task);
1141 return;
1142 }
1143 }
516a6af6 1144 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1145}
1146
4ce70ada 1147static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1148{
4ce70ada 1149 struct nfs4_closedata *calldata = data;
9512135d 1150 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1151 struct rpc_message msg = {
1152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1153 .rpc_argp = &calldata->arg,
1154 .rpc_resp = &calldata->res,
9512135d 1155 .rpc_cred = state->owner->so_cred,
1da177e4 1156 };
4cecb76f 1157 int mode = 0, old_mode;
9512135d 1158
963d8fe5 1159 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1160 return;
9512135d
TM		 1161 /* Recalculate the new open mode in case someone reopened the file
1162 * while we were waiting in line to be scheduled.
1163 */
4cecb76f
TM		 1164 spin_lock(&state->owner->so_lock);
1165 spin_lock(&calldata->inode->i_lock);
1166 mode = old_mode = state->state;
e7616923
TM		 1167 if (state->n_rdwr == 0) {
1168 if (state->n_rdonly == 0)
1169 mode &= ~FMODE_READ;
1170 if (state->n_wronly == 0)
1171 mode &= ~FMODE_WRITE;
1172 }
4cecb76f
TM		 1173 nfs4_state_set_mode_locked(state, mode);
1174 spin_unlock(&calldata->inode->i_lock);
1175 spin_unlock(&state->owner->so_lock);
1176 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
963d8fe5
TM		 1177 /* Note: exit _without_ calling nfs4_close_done */
1178 task->tk_action = NULL;
9512135d
TM		 1179 return;
1180 }
516a6af6 1181 nfs_fattr_init(calldata->res.fattr);
9512135d 1182 if (mode != 0)
1da177e4 1183 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d 1184 calldata->arg.open_flags = mode;
26e976a8 1185 calldata->timestamp = jiffies;
9512135d 1186 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1187}
1188
963d8fe5 1189static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1190 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1191 .rpc_call_done = nfs4_close_done,
1192 .rpc_release = nfs4_free_closedata,
1193};
1194
1da177e4
LT		 1195/*
1196 * It is possible for data to be read/written from a mem-mapped file
1197 * after the sys_close call (which hits the vfs layer as a flush).
1198 * This means that we can't safely call nfsv4 close on a file until
1199 * the inode is cleared. This in turn means that we are not good
1200 * NFSv4 citizens - we do not indicate to the server to update the file's
1201 * share state even when we are done with one of the three share
1202 * stateid's in the inode.
1203 *
1204 * NOTE: Caller must be holding the sp->so_owner semaphore!
1205 */
4cecb76f 1206int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1da177e4 1207{
516a6af6 1208 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1209 struct nfs4_closedata *calldata;
9512135d 1210 int status = -ENOMEM;
1da177e4 1211
9512135d 1212 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1213 if (calldata == NULL)
9512135d 1214 goto out;
1da177e4
LT		 1215 calldata->inode = inode;
1216 calldata->state = state;
1217 calldata->arg.fh = NFS_FH(inode);
9512135d 1218 calldata->arg.stateid = &state->stateid;
1da177e4 1219 /* Serialization for the sequence id */
cee54fc9 1220 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1221 if (calldata->arg.seqid == NULL)
1222 goto out_free_calldata;
516a6af6
TM		 1223 calldata->arg.bitmask = server->attr_bitmask;
1224 calldata->res.fattr = &calldata->fattr;
1225 calldata->res.server = server;
9512135d 1226
4ce70ada 1227 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
9512135d
TM		 1228 if (status == 0)
1229 goto out;
1230
1231 nfs_free_seqid(calldata->arg.seqid);
1232out_free_calldata:
1233 kfree(calldata);
1234out:
1235 return status;
1da177e4
LT		 1236}
1237
95cf959b 1238static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
02a913a7
TM		 1239{
1240 struct file *filp;
1241
1242 filp = lookup_instantiate_filp(nd, dentry, NULL);
1243 if (!IS_ERR(filp)) {
1244 struct nfs_open_context *ctx;
1245 ctx = (struct nfs_open_context *)filp->private_data;
1246 ctx->state = state;
95cf959b
TM		 1247 return 0;
1248 }
1249 nfs4_close_state(state, nd->intent.open.flags);
1250 return PTR_ERR(filp);
02a913a7
TM		 1251}
1252
1253struct dentry *
1da177e4
LT		 1254nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1255{
1256 struct iattr attr;
1257 struct rpc_cred *cred;
1258 struct nfs4_state *state;
02a913a7 1259 struct dentry *res;
1da177e4
LT		 1260
1261 if (nd->flags & LOOKUP_CREATE) {
1262 attr.ia_mode = nd->intent.open.create_mode;
1263 attr.ia_valid = ATTR_MODE;
1264 if (!IS_POSIXACL(dir))
1265 attr.ia_mode &= ~current->fs->umask;
1266 } else {
1267 attr.ia_valid = 0;
1268 BUG_ON(nd->intent.open.flags & O_CREAT);
1269 }
1270
1271 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1272 if (IS_ERR(cred))
02a913a7 1273 return (struct dentry *)cred;
1da177e4
LT		 1274 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1275 put_rpccred(cred);
02a913a7
TM		 1276 if (IS_ERR(state)) {
1277 if (PTR_ERR(state) == -ENOENT)
1278 d_add(dentry, NULL);
1279 return (struct dentry *)state;
1280 }
24ac23ab 1281 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM		 1282 if (res != NULL)
1283 dentry = res;
1284 nfs4_intent_set_file(nd, dentry, state);
1285 return res;
1da177e4
LT		 1286}
1287
1288int
02a913a7 1289nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4
LT		 1290{
1291 struct rpc_cred *cred;
1292 struct nfs4_state *state;
1da177e4
LT		 1293
1294 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1295 if (IS_ERR(cred))
1296 return PTR_ERR(cred);
1297 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1298 if (IS_ERR(state))
1299 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1300 put_rpccred(cred);
02a913a7
TM		 1301 if (IS_ERR(state)) {
1302 switch (PTR_ERR(state)) {
1303 case -EPERM:
1304 case -EACCES:
1305 case -EDQUOT:
1306 case -ENOSPC:
1307 case -EROFS:
1308 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1309 return 1;
1310 case -ENOENT:
1311 if (dentry->d_inode == NULL)
1312 return 1;
1313 }
1314 goto out_drop;
1315 }
24ac23ab 1316 if (state->inode == dentry->d_inode) {
02a913a7 1317 nfs4_intent_set_file(nd, dentry, state);
1da177e4
LT		 1318 return 1;
1319 }
1da177e4 1320 nfs4_close_state(state, openflags);
02a913a7
TM		 1321out_drop:
1322 d_drop(dentry);
1da177e4
LT		 1323 return 0;
1324}
1325
1326
1327static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1328{
1329 struct nfs4_server_caps_res res = {};
1330 struct rpc_message msg = {
1331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1332 .rpc_argp = fhandle,
1333 .rpc_resp = &res,
1334 };
1335 int status;
1336
1337 status = rpc_call_sync(server->client, &msg, 0);
1338 if (status == 0) {
1339 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1340 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1341 server->caps |= NFS_CAP_ACLS;
1342 if (res.has_links != 0)
1343 server->caps |= NFS_CAP_HARDLINKS;
1344 if (res.has_symlinks != 0)
1345 server->caps |= NFS_CAP_SYMLINKS;
1346 server->acl_bitmask = res.acl_bitmask;
1347 }
1348 return status;
1349}
1350
55a97593 1351int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1352{
1353 struct nfs4_exception exception = { };
1354 int err;
1355 do {
1356 err = nfs4_handle_exception(server,
1357 _nfs4_server_capabilities(server, fhandle),
1358 &exception);
1359 } while (exception.retry);
1360 return err;
1361}
1362
1363static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1364 struct nfs_fsinfo *info)
1365{
1da177e4
LT		 1366 struct nfs4_lookup_root_arg args = {
1367 .bitmask = nfs4_fattr_bitmap,
1368 };
1369 struct nfs4_lookup_res res = {
1370 .server = server,
0e574af1 1371 .fattr = info->fattr,
1da177e4
LT		 1372 .fh = fhandle,
1373 };
1374 struct rpc_message msg = {
1375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1376 .rpc_argp = &args,
1377 .rpc_resp = &res,
1378 };
0e574af1 1379 nfs_fattr_init(info->fattr);
1da177e4
LT		 1380 return rpc_call_sync(server->client, &msg, 0);
1381}
1382
1383static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1384 struct nfs_fsinfo *info)
1385{
1386 struct nfs4_exception exception = { };
1387 int err;
1388 do {
1389 err = nfs4_handle_exception(server,
1390 _nfs4_lookup_root(server, fhandle, info),
1391 &exception);
1392 } while (exception.retry);
1393 return err;
1394}
1395
1396static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1397 struct nfs_fsinfo *info)
1398{
1399 struct nfs_fattr * fattr = info->fattr;
1400 unsigned char * p;
1401 struct qstr q;
1402 struct nfs4_lookup_arg args = {
1403 .dir_fh = fhandle,
1404 .name = &q,
1405 .bitmask = nfs4_fattr_bitmap,
1406 };
1407 struct nfs4_lookup_res res = {
1408 .server = server,
1409 .fattr = fattr,
1410 .fh = fhandle,
1411 };
1412 struct rpc_message msg = {
1413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1414 .rpc_argp = &args,
1415 .rpc_resp = &res,
1416 };
1417 int status;
1418
1419 /*
1420 * Now we do a separate LOOKUP for each component of the mount path.
1421 * The LOOKUPs are done separately so that we can conveniently
1422 * catch an ERR_WRONGSEC if it occurs along the way...
1423 */
1424 status = nfs4_lookup_root(server, fhandle, info);
1425 if (status)
1426 goto out;
1427
1428 p = server->mnt_path;
1429 for (;;) {
1430 struct nfs4_exception exception = { };
1431
1432 while (*p == '/')
1433 p++;
1434 if (!*p)
1435 break;
1436 q.name = p;
1437 while (*p && (*p != '/'))
1438 p++;
1439 q.len = p - q.name;
1440
1441 do {
0e574af1 1442 nfs_fattr_init(fattr);
1da177e4
LT		 1443 status = nfs4_handle_exception(server,
1444 rpc_call_sync(server->client, &msg, 0),
1445 &exception);
1446 } while (exception.retry);
1447 if (status == 0)
1448 continue;
1449 if (status == -ENOENT) {
1450 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1451 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1452 }
1453 break;
1454 }
1455 if (status == 0)
1456 status = nfs4_server_capabilities(server, fhandle);
1457 if (status == 0)
1458 status = nfs4_do_fsinfo(server, fhandle, info);
1459out:
c12e87f4 1460 return nfs4_map_errors(status);
1da177e4
LT		 1461}
1462
6b97fd3d
MN		 1463/*
1464 * Get locations and (maybe) other attributes of a referral.
1465 * Note that we'll actually follow the referral later when
1466 * we detect fsid mismatch in inode revalidation
1467 */
1468static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1469{
1470 int status = -ENOMEM;
1471 struct page *page = NULL;
1472 struct nfs4_fs_locations *locations = NULL;
1473 struct dentry dentry = {};
1474
1475 page = alloc_page(GFP_KERNEL);
1476 if (page == NULL)
1477 goto out;
1478 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1479 if (locations == NULL)
1480 goto out;
1481
1482 dentry.d_name.name = name->name;
1483 dentry.d_name.len = name->len;
1484 status = nfs4_proc_fs_locations(dir, &dentry, locations, page);
1485 if (status != 0)
1486 goto out;
1487 /* Make sure server returned a different fsid for the referral */
1488 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1489 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1490 status = -EIO;
1491 goto out;
1492 }
1493
1494 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1495 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1496 if (!fattr->mode)
1497 fattr->mode = S_IFDIR;
1498 memset(fhandle, 0, sizeof(struct nfs_fh));
1499out:
1500 if (page)
1501 __free_page(page);
1502 if (locations)
1503 kfree(locations);
1504 return status;
1505}
1506
1da177e4
LT		 1507static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1508{
1509 struct nfs4_getattr_arg args = {
1510 .fh = fhandle,
1511 .bitmask = server->attr_bitmask,
1512 };
1513 struct nfs4_getattr_res res = {
1514 .fattr = fattr,
1515 .server = server,
1516 };
1517 struct rpc_message msg = {
1518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1519 .rpc_argp = &args,
1520 .rpc_resp = &res,
1521 };
1522
0e574af1 1523 nfs_fattr_init(fattr);
1da177e4
LT		 1524 return rpc_call_sync(server->client, &msg, 0);
1525}
1526
1527static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1528{
1529 struct nfs4_exception exception = { };
1530 int err;
1531 do {
1532 err = nfs4_handle_exception(server,
1533 _nfs4_proc_getattr(server, fhandle, fattr),
1534 &exception);
1535 } while (exception.retry);
1536 return err;
1537}
1538
1539/*
1540 * The file is not closed if it is opened due to the a request to change
1541 * the size of the file. The open call will not be needed once the
1542 * VFS layer lookup-intents are implemented.
1543 *
1544 * Close is called when the inode is destroyed.
1545 * If we haven't opened the file for O_WRONLY, we
1546 * need to in the size_change case to obtain a stateid.
1547 *
1548 * Got race?
1549 * Because OPEN is always done by name in nfsv4, it is
1550 * possible that we opened a different file by the same
1551 * name. We can recognize this race condition, but we
1552 * can't do anything about it besides returning an error.
1553 *
1554 * This will be fixed with VFS changes (lookup-intent).
1555 */
1556static int
1557nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1558 struct iattr *sattr)
1559{
08e9eac4
TM		 1560 struct rpc_cred *cred;
1561 struct inode *inode = dentry->d_inode;
d530838b
TM		 1562 struct nfs_open_context *ctx;
1563 struct nfs4_state *state = NULL;
1da177e4
LT		 1564 int status;
1565
0e574af1 1566 nfs_fattr_init(fattr);
1da177e4 1567
08e9eac4
TM		 1568 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1569 if (IS_ERR(cred))
1570 return PTR_ERR(cred);
d530838b
TM		 1571
1572 /* Search for an existing open(O_WRITE) file */
1573 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1574 if (ctx != NULL)
1575 state = ctx->state;
08e9eac4 1576
3e4f6290 1577 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1578 if (status == 0)
1579 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1580 if (ctx != NULL)
1581 put_nfs_open_context(ctx);
08e9eac4 1582 put_rpccred(cred);
1da177e4
LT		 1583 return status;
1584}
1585
2b3de441
DH		 1586static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1587 struct qstr *name, struct nfs_fh *fhandle,
1588 struct nfs_fattr *fattr)
1589{
1590 int status;
1591 struct nfs4_lookup_arg args = {
1592 .bitmask = server->attr_bitmask,
1593 .dir_fh = dirfh,
1594 .name = name,
1595 };
1596 struct nfs4_lookup_res res = {
1597 .server = server,
1598 .fattr = fattr,
1599 .fh = fhandle,
1600 };
1601 struct rpc_message msg = {
1602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1603 .rpc_argp = &args,
1604 .rpc_resp = &res,
1605 };
1606
1607 nfs_fattr_init(fattr);
1608
1609 dprintk("NFS call lookupfh %s\n", name->name);
1610 status = rpc_call_sync(server->client, &msg, 0);
1611 dprintk("NFS reply lookupfh: %d\n", status);
1612 if (status == -NFS4ERR_MOVED)
1613 status = -EREMOTE;
1614 return status;
1615}
1616
1617static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1618 struct qstr *name, struct nfs_fh *fhandle,
1619 struct nfs_fattr *fattr)
1620{
1621 struct nfs4_exception exception = { };
1622 int err;
1623 do {
1624 err = nfs4_handle_exception(server,
1625 _nfs4_proc_lookupfh(server, dirfh, name,
1626 fhandle, fattr),
1627 &exception);
1628 } while (exception.retry);
1629 return err;
1630}
1631
1da177e4
LT		 1632static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1633 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1634{
1635 int status;
1636 struct nfs_server *server = NFS_SERVER(dir);
1637 struct nfs4_lookup_arg args = {
1638 .bitmask = server->attr_bitmask,
1639 .dir_fh = NFS_FH(dir),
1640 .name = name,
1641 };
1642 struct nfs4_lookup_res res = {
1643 .server = server,
1644 .fattr = fattr,
1645 .fh = fhandle,
1646 };
1647 struct rpc_message msg = {
1648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1649 .rpc_argp = &args,
1650 .rpc_resp = &res,
1651 };
1652
0e574af1 1653 nfs_fattr_init(fattr);
1da177e4
LT		 1654
1655 dprintk("NFS call lookup %s\n", name->name);
1656 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
6b97fd3d
MN		 1657 if (status == -NFS4ERR_MOVED)
1658 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1659 dprintk("NFS reply lookup: %d\n", status);
1660 return status;
1661}
1662
1663static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1664{
1665 struct nfs4_exception exception = { };
1666 int err;
1667 do {
1668 err = nfs4_handle_exception(NFS_SERVER(dir),
1669 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1670 &exception);
1671 } while (exception.retry);
1672 return err;
1673}
1674
1675static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1676{
1677 struct nfs4_accessargs args = {
1678 .fh = NFS_FH(inode),
1679 };
1680 struct nfs4_accessres res = { 0 };
1681 struct rpc_message msg = {
1682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1683 .rpc_argp = &args,
1684 .rpc_resp = &res,
1685 .rpc_cred = entry->cred,
1686 };
1687 int mode = entry->mask;
1688 int status;
1689
1690 /*
1691 * Determine which access bits we want to ask for...
1692 */
1693 if (mode & MAY_READ)
1694 args.access |= NFS4_ACCESS_READ;
1695 if (S_ISDIR(inode->i_mode)) {
1696 if (mode & MAY_WRITE)
1697 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1698 if (mode & MAY_EXEC)
1699 args.access |= NFS4_ACCESS_LOOKUP;
1700 } else {
1701 if (mode & MAY_WRITE)
1702 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1703 if (mode & MAY_EXEC)
1704 args.access |= NFS4_ACCESS_EXECUTE;
1705 }
1706 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1707 if (!status) {
1708 entry->mask = 0;
1709 if (res.access & NFS4_ACCESS_READ)
1710 entry->mask |= MAY_READ;
1711 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1712 entry->mask |= MAY_WRITE;
1713 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1714 entry->mask |= MAY_EXEC;
1715 }
1716 return status;
1717}
1718
1719static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1720{
1721 struct nfs4_exception exception = { };
1722 int err;
1723 do {
1724 err = nfs4_handle_exception(NFS_SERVER(inode),
1725 _nfs4_proc_access(inode, entry),
1726 &exception);
1727 } while (exception.retry);
1728 return err;
1729}
1730
1731/*
1732 * TODO: For the time being, we don't try to get any attributes
1733 * along with any of the zero-copy operations READ, READDIR,
1734 * READLINK, WRITE.
1735 *
1736 * In the case of the first three, we want to put the GETATTR
1737 * after the read-type operation -- this is because it is hard
1738 * to predict the length of a GETATTR response in v4, and thus
1739 * align the READ data correctly. This means that the GETATTR
1740 * may end up partially falling into the page cache, and we should
1741 * shift it into the 'tail' of the xdr_buf before processing.
1742 * To do this efficiently, we need to know the total length
1743 * of data received, which doesn't seem to be available outside
1744 * of the RPC layer.
1745 *
1746 * In the case of WRITE, we also want to put the GETATTR after
1747 * the operation -- in this case because we want to make sure
1748 * we get the post-operation mtime and size. This means that
1749 * we can't use xdr_encode_pages() as written: we need a variant
1750 * of it which would leave room in the 'tail' iovec.
1751 *
1752 * Both of these changes to the XDR layer would in fact be quite
1753 * minor, but I decided to leave them for a subsequent patch.
1754 */
1755static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1756 unsigned int pgbase, unsigned int pglen)
1757{
1758 struct nfs4_readlink args = {
1759 .fh = NFS_FH(inode),
1760 .pgbase = pgbase,
1761 .pglen = pglen,
1762 .pages = &page,
1763 };
1764 struct rpc_message msg = {
1765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1766 .rpc_argp = &args,
1767 .rpc_resp = NULL,
1768 };
1769
1770 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1771}
1772
1773static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1774 unsigned int pgbase, unsigned int pglen)
1775{
1776 struct nfs4_exception exception = { };
1777 int err;
1778 do {
1779 err = nfs4_handle_exception(NFS_SERVER(inode),
1780 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1781 &exception);
1782 } while (exception.retry);
1783 return err;
1784}
1785
1786static int _nfs4_proc_read(struct nfs_read_data *rdata)
1787{
1788 int flags = rdata->flags;
1789 struct inode *inode = rdata->inode;
1790 struct nfs_fattr *fattr = rdata->res.fattr;
1791 struct nfs_server *server = NFS_SERVER(inode);
1792 struct rpc_message msg = {
1793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1794 .rpc_argp = &rdata->args,
1795 .rpc_resp = &rdata->res,
1796 .rpc_cred = rdata->cred,
1797 };
1798 unsigned long timestamp = jiffies;
1799 int status;
1800
1801 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1802 (long long) rdata->args.offset);
1803
0e574af1 1804 nfs_fattr_init(fattr);
1da177e4
LT		 1805 status = rpc_call_sync(server->client, &msg, flags);
1806 if (!status)
1807 renew_lease(server, timestamp);
1808 dprintk("NFS reply read: %d\n", status);
1809 return status;
1810}
1811
1812static int nfs4_proc_read(struct nfs_read_data *rdata)
1813{
1814 struct nfs4_exception exception = { };
1815 int err;
1816 do {
1817 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1818 _nfs4_proc_read(rdata),
1819 &exception);
1820 } while (exception.retry);
1821 return err;
1822}
1823
1824static int _nfs4_proc_write(struct nfs_write_data *wdata)
1825{
1826 int rpcflags = wdata->flags;
1827 struct inode *inode = wdata->inode;
1828 struct nfs_fattr *fattr = wdata->res.fattr;
1829 struct nfs_server *server = NFS_SERVER(inode);
1830 struct rpc_message msg = {
1831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1832 .rpc_argp = &wdata->args,
1833 .rpc_resp = &wdata->res,
1834 .rpc_cred = wdata->cred,
1835 };
1836 int status;
1837
1838 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1839 (long long) wdata->args.offset);
1840
3b6efee9
TM		 1841 wdata->args.bitmask = server->attr_bitmask;
1842 wdata->res.server = server;
26e976a8 1843 wdata->timestamp = jiffies;
0e574af1 1844 nfs_fattr_init(fattr);
1da177e4
LT		 1845 status = rpc_call_sync(server->client, &msg, rpcflags);
1846 dprintk("NFS reply write: %d\n", status);
3b6efee9
TM		 1847 if (status < 0)
1848 return status;
26e976a8 1849 renew_lease(server, wdata->timestamp);
3b6efee9
TM		 1850 nfs_post_op_update_inode(inode, fattr);
1851 return wdata->res.count;
1da177e4
LT		 1852}
1853
1854static int nfs4_proc_write(struct nfs_write_data *wdata)
1855{
1856 struct nfs4_exception exception = { };
1857 int err;
1858 do {
1859 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1860 _nfs4_proc_write(wdata),
1861 &exception);
1862 } while (exception.retry);
1863 return err;
1864}
1865
1866static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1867{
1868 struct inode *inode = cdata->inode;
1869 struct nfs_fattr *fattr = cdata->res.fattr;
1870 struct nfs_server *server = NFS_SERVER(inode);
1871 struct rpc_message msg = {
1872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1873 .rpc_argp = &cdata->args,
1874 .rpc_resp = &cdata->res,
1875 .rpc_cred = cdata->cred,
1876 };
1877 int status;
1878
1879 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1880 (long long) cdata->args.offset);
1881
3b6efee9
TM		 1882 cdata->args.bitmask = server->attr_bitmask;
1883 cdata->res.server = server;
26e976a8 1884 cdata->timestamp = jiffies;
0e574af1 1885 nfs_fattr_init(fattr);
1da177e4 1886 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1887 if (status >= 0)
1888 renew_lease(server, cdata->timestamp);
1da177e4 1889 dprintk("NFS reply commit: %d\n", status);
3b6efee9
TM		 1890 if (status >= 0)
1891 nfs_post_op_update_inode(inode, fattr);
1da177e4
LT		 1892 return status;
1893}
1894
1895static int nfs4_proc_commit(struct nfs_write_data *cdata)
1896{
1897 struct nfs4_exception exception = { };
1898 int err;
1899 do {
1900 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1901 _nfs4_proc_commit(cdata),
1902 &exception);
1903 } while (exception.retry);
1904 return err;
1905}
1906
1907/*
1908 * Got race?
1909 * We will need to arrange for the VFS layer to provide an atomic open.
1910 * Until then, this create/open method is prone to inefficiency and race
1911 * conditions due to the lookup, create, and open VFS calls from sys_open()
1912 * placed on the wire.
1913 *
1914 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1915 * The file will be opened again in the subsequent VFS open call
1916 * (nfs4_proc_file_open).
1917 *
1918 * The open for read will just hang around to be used by any process that
1919 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1920 */
1921
1922static int
1923nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1924 int flags, struct nameidata *nd)
1da177e4
LT		 1925{
1926 struct nfs4_state *state;
1927 struct rpc_cred *cred;
1928 int status = 0;
1929
1930 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1931 if (IS_ERR(cred)) {
1932 status = PTR_ERR(cred);
1933 goto out;
1934 }
1935 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1936 put_rpccred(cred);
1937 if (IS_ERR(state)) {
1938 status = PTR_ERR(state);
1939 goto out;
1940 }
24ac23ab 1941 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1942 if (flags & O_EXCL) {
1943 struct nfs_fattr fattr;
3e4f6290 1944 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1945 if (status == 0)
65e4308d 1946 nfs_setattr_update_inode(state->inode, sattr);
02a913a7
TM		 1947 }
1948 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
95cf959b 1949 status = nfs4_intent_set_file(nd, dentry, state);
02a913a7
TM		 1950 else
1951 nfs4_close_state(state, flags);
1da177e4
LT		 1952out:
1953 return status;
1954}
1955
1956static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1957{
16e42959 1958 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 1959 struct nfs4_remove_arg args = {
1960 .fh = NFS_FH(dir),
1961 .name = name,
16e42959
TM		 1962 .bitmask = server->attr_bitmask,
1963 };
1964 struct nfs_fattr dir_attr;
1965 struct nfs4_remove_res res = {
1966 .server = server,
1967 .dir_attr = &dir_attr,
1da177e4 1968 };
1da177e4
LT		 1969 struct rpc_message msg = {
1970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1971 .rpc_argp = &args,
1972 .rpc_resp = &res,
1973 };
1974 int status;
1975
16e42959
TM		 1976 nfs_fattr_init(res.dir_attr);
1977 status = rpc_call_sync(server->client, &msg, 0);
1978 if (status == 0) {
1979 update_changeattr(dir, &res.cinfo);
1980 nfs_post_op_update_inode(dir, res.dir_attr);
1981 }
1da177e4
LT		 1982 return status;
1983}
1984
1985static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1986{
1987 struct nfs4_exception exception = { };
1988 int err;
1989 do {
1990 err = nfs4_handle_exception(NFS_SERVER(dir),
1991 _nfs4_proc_remove(dir, name),
1992 &exception);
1993 } while (exception.retry);
1994 return err;
1995}
1996
1997struct unlink_desc {
1998 struct nfs4_remove_arg args;
16e42959
TM		 1999 struct nfs4_remove_res res;
2000 struct nfs_fattr dir_attr;
1da177e4
LT		 2001};
2002
2003static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
2004 struct qstr *name)
2005{
16e42959 2006 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1da177e4
LT		 2007 struct unlink_desc *up;
2008
2009 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
2010 if (!up)
2011 return -ENOMEM;
2012
2013 up->args.fh = NFS_FH(dir->d_inode);
2014 up->args.name = name;
16e42959
TM		 2015 up->args.bitmask = server->attr_bitmask;
2016 up->res.server = server;
2017 up->res.dir_attr = &up->dir_attr;
1da177e4
LT		 2018
2019 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2020 msg->rpc_argp = &up->args;
2021 msg->rpc_resp = &up->res;
2022 return 0;
2023}
2024
2025static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
2026{
2027 struct rpc_message *msg = &task->tk_msg;
2028 struct unlink_desc *up;
2029
2030 if (msg->rpc_resp != NULL) {
2031 up = container_of(msg->rpc_resp, struct unlink_desc, res);
16e42959
TM		 2032 update_changeattr(dir->d_inode, &up->res.cinfo);
2033 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1da177e4
LT		 2034 kfree(up);
2035 msg->rpc_resp = NULL;
2036 msg->rpc_argp = NULL;
2037 }
2038 return 0;
2039}
2040
2041static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2042 struct inode *new_dir, struct qstr *new_name)
2043{
6caf2c82 2044 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2045 struct nfs4_rename_arg arg = {
2046 .old_dir = NFS_FH(old_dir),
2047 .new_dir = NFS_FH(new_dir),
2048 .old_name = old_name,
2049 .new_name = new_name,
6caf2c82
TM		 2050 .bitmask = server->attr_bitmask,
2051 };
2052 struct nfs_fattr old_fattr, new_fattr;
2053 struct nfs4_rename_res res = {
2054 .server = server,
2055 .old_fattr = &old_fattr,
2056 .new_fattr = &new_fattr,
1da177e4 2057 };
1da177e4
LT		 2058 struct rpc_message msg = {
2059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2060 .rpc_argp = &arg,
2061 .rpc_resp = &res,
2062 };
2063 int status;
2064
6caf2c82
TM		 2065 nfs_fattr_init(res.old_fattr);
2066 nfs_fattr_init(res.new_fattr);
2067 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2068
2069 if (!status) {
2070 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2071 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2072 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2073 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2074 }
2075 return status;
2076}
2077
2078static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2079 struct inode *new_dir, struct qstr *new_name)
2080{
2081 struct nfs4_exception exception = { };
2082 int err;
2083 do {
2084 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2085 _nfs4_proc_rename(old_dir, old_name,
2086 new_dir, new_name),
2087 &exception);
2088 } while (exception.retry);
2089 return err;
2090}
2091
2092static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2093{
91ba2eee 2094 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2095 struct nfs4_link_arg arg = {
2096 .fh = NFS_FH(inode),
2097 .dir_fh = NFS_FH(dir),
2098 .name = name,
91ba2eee
TM		 2099 .bitmask = server->attr_bitmask,
2100 };
2101 struct nfs_fattr fattr, dir_attr;
2102 struct nfs4_link_res res = {
2103 .server = server,
2104 .fattr = &fattr,
2105 .dir_attr = &dir_attr,
1da177e4 2106 };
1da177e4
LT		 2107 struct rpc_message msg = {
2108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2109 .rpc_argp = &arg,
91ba2eee 2110 .rpc_resp = &res,
1da177e4
LT		 2111 };
2112 int status;
2113
91ba2eee
TM		 2114 nfs_fattr_init(res.fattr);
2115 nfs_fattr_init(res.dir_attr);
2116 status = rpc_call_sync(server->client, &msg, 0);
2117 if (!status) {
2118 update_changeattr(dir, &res.cinfo);
2119 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2120 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2121 }
1da177e4
LT		 2122
2123 return status;
2124}
2125
2126static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2127{
2128 struct nfs4_exception exception = { };
2129 int err;
2130 do {
2131 err = nfs4_handle_exception(NFS_SERVER(inode),
2132 _nfs4_proc_link(inode, dir, name),
2133 &exception);
2134 } while (exception.retry);
2135 return err;
2136}
2137
2138static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2139 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2140 struct nfs_fattr *fattr)
2141{
2142 struct nfs_server *server = NFS_SERVER(dir);
56ae19f3 2143 struct nfs_fattr dir_fattr;
1da177e4
LT		 2144 struct nfs4_create_arg arg = {
2145 .dir_fh = NFS_FH(dir),
2146 .server = server,
2147 .name = name,
2148 .attrs = sattr,
2149 .ftype = NF4LNK,
2150 .bitmask = server->attr_bitmask,
2151 };
2152 struct nfs4_create_res res = {
2153 .server = server,
2154 .fh = fhandle,
2155 .fattr = fattr,
56ae19f3 2156 .dir_fattr = &dir_fattr,
1da177e4
LT		 2157 };
2158 struct rpc_message msg = {
2159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2160 .rpc_argp = &arg,
2161 .rpc_resp = &res,
2162 };
2163 int status;
2164
2165 if (path->len > NFS4_MAXPATHLEN)
2166 return -ENAMETOOLONG;
2167 arg.u.symlink = path;
0e574af1 2168 nfs_fattr_init(fattr);
56ae19f3 2169 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2170
2171 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2172 if (!status)
2173 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2174 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2175 return status;
2176}
2177
2178static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2179 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2180 struct nfs_fattr *fattr)
2181{
2182 struct nfs4_exception exception = { };
2183 int err;
2184 do {
2185 err = nfs4_handle_exception(NFS_SERVER(dir),
2186 _nfs4_proc_symlink(dir, name, path, sattr,
2187 fhandle, fattr),
2188 &exception);
2189 } while (exception.retry);
2190 return err;
2191}
2192
2193static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2194 struct iattr *sattr)
2195{
2196 struct nfs_server *server = NFS_SERVER(dir);
2197 struct nfs_fh fhandle;
56ae19f3 2198 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2199 struct nfs4_create_arg arg = {
2200 .dir_fh = NFS_FH(dir),
2201 .server = server,
2202 .name = &dentry->d_name,
2203 .attrs = sattr,
2204 .ftype = NF4DIR,
2205 .bitmask = server->attr_bitmask,
2206 };
2207 struct nfs4_create_res res = {
2208 .server = server,
2209 .fh = &fhandle,
2210 .fattr = &fattr,
56ae19f3 2211 .dir_fattr = &dir_fattr,
1da177e4
LT		 2212 };
2213 struct rpc_message msg = {
2214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2215 .rpc_argp = &arg,
2216 .rpc_resp = &res,
2217 };
2218 int status;
2219
0e574af1 2220 nfs_fattr_init(&fattr);
56ae19f3 2221 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2222
2223 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2224 if (!status) {
2225 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2226 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2227 status = nfs_instantiate(dentry, &fhandle, &fattr);
2228 }
2229 return status;
2230}
2231
2232static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2233 struct iattr *sattr)
2234{
2235 struct nfs4_exception exception = { };
2236 int err;
2237 do {
2238 err = nfs4_handle_exception(NFS_SERVER(dir),
2239 _nfs4_proc_mkdir(dir, dentry, sattr),
2240 &exception);
2241 } while (exception.retry);
2242 return err;
2243}
2244
2245static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2246 u64 cookie, struct page *page, unsigned int count, int plus)
2247{
2248 struct inode *dir = dentry->d_inode;
2249 struct nfs4_readdir_arg args = {
2250 .fh = NFS_FH(dir),
2251 .pages = &page,
2252 .pgbase = 0,
2253 .count = count,
2254 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2255 };
2256 struct nfs4_readdir_res res;
2257 struct rpc_message msg = {
2258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2259 .rpc_argp = &args,
2260 .rpc_resp = &res,
2261 .rpc_cred = cred,
2262 };
2263 int status;
2264
eadf4598
TM		 2265 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2266 dentry->d_parent->d_name.name,
2267 dentry->d_name.name,
2268 (unsigned long long)cookie);
1da177e4
LT		 2269 lock_kernel();
2270 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2271 res.pgbase = args.pgbase;
2272 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2273 if (status == 0)
2274 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2275 unlock_kernel();
eadf4598 2276 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2277 return status;
2278}
2279
2280static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2281 u64 cookie, struct page *page, unsigned int count, int plus)
2282{
2283 struct nfs4_exception exception = { };
2284 int err;
2285 do {
2286 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2287 _nfs4_proc_readdir(dentry, cred, cookie,
2288 page, count, plus),
2289 &exception);
2290 } while (exception.retry);
2291 return err;
2292}
2293
2294static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2295 struct iattr *sattr, dev_t rdev)
2296{
2297 struct nfs_server *server = NFS_SERVER(dir);
2298 struct nfs_fh fh;
56ae19f3 2299 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2300 struct nfs4_create_arg arg = {
2301 .dir_fh = NFS_FH(dir),
2302 .server = server,
2303 .name = &dentry->d_name,
2304 .attrs = sattr,
2305 .bitmask = server->attr_bitmask,
2306 };
2307 struct nfs4_create_res res = {
2308 .server = server,
2309 .fh = &fh,
2310 .fattr = &fattr,
56ae19f3 2311 .dir_fattr = &dir_fattr,
1da177e4
LT		 2312 };
2313 struct rpc_message msg = {
2314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2315 .rpc_argp = &arg,
2316 .rpc_resp = &res,
2317 };
2318 int status;
2319 int mode = sattr->ia_mode;
2320
0e574af1 2321 nfs_fattr_init(&fattr);
56ae19f3 2322 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2323
2324 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2325 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2326 if (S_ISFIFO(mode))
2327 arg.ftype = NF4FIFO;
2328 else if (S_ISBLK(mode)) {
2329 arg.ftype = NF4BLK;
2330 arg.u.device.specdata1 = MAJOR(rdev);
2331 arg.u.device.specdata2 = MINOR(rdev);
2332 }
2333 else if (S_ISCHR(mode)) {
2334 arg.ftype = NF4CHR;
2335 arg.u.device.specdata1 = MAJOR(rdev);
2336 arg.u.device.specdata2 = MINOR(rdev);
2337 }
2338 else
2339 arg.ftype = NF4SOCK;
2340
2341 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2342 if (status == 0) {
2343 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2344 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2345 status = nfs_instantiate(dentry, &fh, &fattr);
2346 }
2347 return status;
2348}
2349
2350static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2351 struct iattr *sattr, dev_t rdev)
2352{
2353 struct nfs4_exception exception = { };
2354 int err;
2355 do {
2356 err = nfs4_handle_exception(NFS_SERVER(dir),
2357 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2358 &exception);
2359 } while (exception.retry);
2360 return err;
2361}
2362
2363static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2364 struct nfs_fsstat *fsstat)
2365{
2366 struct nfs4_statfs_arg args = {
2367 .fh = fhandle,
2368 .bitmask = server->attr_bitmask,
2369 };
2370 struct rpc_message msg = {
2371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2372 .rpc_argp = &args,
2373 .rpc_resp = fsstat,
2374 };
2375
0e574af1 2376 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2377 return rpc_call_sync(server->client, &msg, 0);
2378}
2379
2380static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2381{
2382 struct nfs4_exception exception = { };
2383 int err;
2384 do {
2385 err = nfs4_handle_exception(server,
2386 _nfs4_proc_statfs(server, fhandle, fsstat),
2387 &exception);
2388 } while (exception.retry);
2389 return err;
2390}
2391
2392static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2393 struct nfs_fsinfo *fsinfo)
2394{
2395 struct nfs4_fsinfo_arg args = {
2396 .fh = fhandle,
2397 .bitmask = server->attr_bitmask,
2398 };
2399 struct rpc_message msg = {
2400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2401 .rpc_argp = &args,
2402 .rpc_resp = fsinfo,
2403 };
2404
2405 return rpc_call_sync(server->client, &msg, 0);
2406}
2407
2408static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2409{
2410 struct nfs4_exception exception = { };
2411 int err;
2412
2413 do {
2414 err = nfs4_handle_exception(server,
2415 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2416 &exception);
2417 } while (exception.retry);
2418 return err;
2419}
2420
2421static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2422{
0e574af1 2423 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2424 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2425}
2426
2427static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2428 struct nfs_pathconf *pathconf)
2429{
2430 struct nfs4_pathconf_arg args = {
2431 .fh = fhandle,
2432 .bitmask = server->attr_bitmask,
2433 };
2434 struct rpc_message msg = {
2435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2436 .rpc_argp = &args,
2437 .rpc_resp = pathconf,
2438 };
2439
2440 /* None of the pathconf attributes are mandatory to implement */
2441 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2442 memset(pathconf, 0, sizeof(*pathconf));
2443 return 0;
2444 }
2445
0e574af1 2446 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2447 return rpc_call_sync(server->client, &msg, 0);
2448}
2449
2450static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2451 struct nfs_pathconf *pathconf)
2452{
2453 struct nfs4_exception exception = { };
2454 int err;
2455
2456 do {
2457 err = nfs4_handle_exception(server,
2458 _nfs4_proc_pathconf(server, fhandle, pathconf),
2459 &exception);
2460 } while (exception.retry);
2461 return err;
2462}
2463
ec06c096 2464static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2465{
ec06c096 2466 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2467
ec06c096 2468 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2469 rpc_restart_call(task);
ec06c096 2470 return -EAGAIN;
1da177e4
LT		 2471 }
2472 if (task->tk_status > 0)
ec06c096
TM		 2473 renew_lease(server, data->timestamp);
2474 return 0;
1da177e4
LT		 2475}
2476
ec06c096 2477static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2478{
1da177e4
LT		 2479 struct rpc_message msg = {
2480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2481 .rpc_argp = &data->args,
2482 .rpc_resp = &data->res,
2483 .rpc_cred = data->cred,
2484 };
1da177e4
LT		 2485
2486 data->timestamp = jiffies;
2487
ec06c096 2488 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2489}
2490
788e7a89 2491static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2492{
1da177e4
LT		 2493 struct inode *inode = data->inode;
2494
2495 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2496 rpc_restart_call(task);
788e7a89 2497 return -EAGAIN;
1da177e4 2498 }
4f9838c7 2499 if (task->tk_status >= 0) {
1da177e4 2500 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2501 nfs_post_op_update_inode(inode, data->res.fattr);
2502 }
788e7a89 2503 return 0;
1da177e4
LT		 2504}
2505
788e7a89 2506static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2507{
1da177e4
LT		 2508 struct rpc_message msg = {
2509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2510 .rpc_argp = &data->args,
2511 .rpc_resp = &data->res,
2512 .rpc_cred = data->cred,
2513 };
2514 struct inode *inode = data->inode;
4f9838c7 2515 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2516 int stable;
1da177e4
LT		 2517
2518 if (how & FLUSH_STABLE) {
2519 if (!NFS_I(inode)->ncommit)
2520 stable = NFS_FILE_SYNC;
2521 else
2522 stable = NFS_DATA_SYNC;
2523 } else
2524 stable = NFS_UNSTABLE;
2525 data->args.stable = stable;
4f9838c7
TM		 2526 data->args.bitmask = server->attr_bitmask;
2527 data->res.server = server;
1da177e4
LT		 2528
2529 data->timestamp = jiffies;
2530
1da177e4 2531 /* Finalize the task. */
788e7a89 2532 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2533}
2534
788e7a89 2535static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2536{
1da177e4
LT		 2537 struct inode *inode = data->inode;
2538
2539 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2540 rpc_restart_call(task);
788e7a89 2541 return -EAGAIN;
1da177e4 2542 }
4f9838c7
TM		 2543 if (task->tk_status >= 0)
2544 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2545 return 0;
1da177e4
LT		 2546}
2547
788e7a89 2548static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2549{
1da177e4
LT		 2550 struct rpc_message msg = {
2551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2552 .rpc_argp = &data->args,
2553 .rpc_resp = &data->res,
2554 .rpc_cred = data->cred,
2555 };
788e7a89 2556 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2557
4f9838c7
TM		 2558 data->args.bitmask = server->attr_bitmask;
2559 data->res.server = server;
2560
788e7a89 2561 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2562}
2563
2564/*
2565 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2566 * standalone procedure for queueing an asynchronous RENEW.
2567 */
963d8fe5 2568static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2569{
adfa6f98 2570 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2571 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2572
2573 if (task->tk_status < 0) {
2574 switch (task->tk_status) {
2575 case -NFS4ERR_STALE_CLIENTID:
2576 case -NFS4ERR_EXPIRED:
2577 case -NFS4ERR_CB_PATH_DOWN:
2578 nfs4_schedule_state_recovery(clp);
2579 }
2580 return;
2581 }
2582 spin_lock(&clp->cl_lock);
2583 if (time_before(clp->cl_last_renewal,timestamp))
2584 clp->cl_last_renewal = timestamp;
2585 spin_unlock(&clp->cl_lock);
2586}
2587
963d8fe5
TM		 2588static const struct rpc_call_ops nfs4_renew_ops = {
2589 .rpc_call_done = nfs4_renew_done,
2590};
2591
adfa6f98 2592int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2593{
2594 struct rpc_message msg = {
2595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2596 .rpc_argp = clp,
b4454fe1 2597 .rpc_cred = cred,
1da177e4
LT		 2598 };
2599
2600 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2601 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2602}
2603
adfa6f98 2604int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2605{
2606 struct rpc_message msg = {
2607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2608 .rpc_argp = clp,
b4454fe1 2609 .rpc_cred = cred,
1da177e4
LT		 2610 };
2611 unsigned long now = jiffies;
2612 int status;
2613
2614 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2615 if (status < 0)
2616 return status;
2617 spin_lock(&clp->cl_lock);
2618 if (time_before(clp->cl_last_renewal,now))
2619 clp->cl_last_renewal = now;
2620 spin_unlock(&clp->cl_lock);
2621 return 0;
2622}
2623
aa1870af
BF		 2624static inline int nfs4_server_supports_acls(struct nfs_server *server)
2625{
2626 return (server->caps & NFS_CAP_ACLS)
2627 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2628 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2629}
2630
2631/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2632 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2633 * the stack.
2634 */
2635#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2636
2637static void buf_to_pages(const void *buf, size_t buflen,
2638 struct page **pages, unsigned int *pgbase)
2639{
2640 const void *p = buf;
2641
2642 *pgbase = offset_in_page(buf);
2643 p -= *pgbase;
2644 while (p < buf + buflen) {
2645 *(pages++) = virt_to_page(p);
2646 p += PAGE_CACHE_SIZE;
2647 }
2648}
2649
e50a1c2e
BF		 2650struct nfs4_cached_acl {
2651 int cached;
2652 size_t len;
3e9d4154 2653 char data[0];
e50a1c2e
BF		 2654};
2655
2656static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2657{
2658 struct nfs_inode *nfsi = NFS_I(inode);
2659
2660 spin_lock(&inode->i_lock);
2661 kfree(nfsi->nfs4_acl);
2662 nfsi->nfs4_acl = acl;
2663 spin_unlock(&inode->i_lock);
2664}
2665
2666static void nfs4_zap_acl_attr(struct inode *inode)
2667{
2668 nfs4_set_cached_acl(inode, NULL);
2669}
2670
2671static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2672{
2673 struct nfs_inode *nfsi = NFS_I(inode);
2674 struct nfs4_cached_acl *acl;
2675 int ret = -ENOENT;
2676
2677 spin_lock(&inode->i_lock);
2678 acl = nfsi->nfs4_acl;
2679 if (acl == NULL)
2680 goto out;
2681 if (buf == NULL) /* user is just asking for length */
2682 goto out_len;
2683 if (acl->cached == 0)
2684 goto out;
2685 ret = -ERANGE; /* see getxattr(2) man page */
2686 if (acl->len > buflen)
2687 goto out;
2688 memcpy(buf, acl->data, acl->len);
2689out_len:
2690 ret = acl->len;
2691out:
2692 spin_unlock(&inode->i_lock);
2693 return ret;
2694}
2695
2696static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2697{
2698 struct nfs4_cached_acl *acl;
2699
2700 if (buf && acl_len <= PAGE_SIZE) {
2701 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2702 if (acl == NULL)
2703 goto out;
2704 acl->cached = 1;
2705 memcpy(acl->data, buf, acl_len);
2706 } else {
2707 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2708 if (acl == NULL)
2709 goto out;
2710 acl->cached = 0;
2711 }
2712 acl->len = acl_len;
2713out:
2714 nfs4_set_cached_acl(inode, acl);
2715}
2716
16b4289c 2717static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2718{
aa1870af
BF		 2719 struct page *pages[NFS4ACL_MAXPAGES];
2720 struct nfs_getaclargs args = {
2721 .fh = NFS_FH(inode),
2722 .acl_pages = pages,
2723 .acl_len = buflen,
2724 };
2725 size_t resp_len = buflen;
e50a1c2e 2726 void *resp_buf;
aa1870af
BF		 2727 struct rpc_message msg = {
2728 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2729 .rpc_argp = &args,
2730 .rpc_resp = &resp_len,
2731 };
e50a1c2e 2732 struct page *localpage = NULL;
aa1870af
BF		 2733 int ret;
2734
e50a1c2e
BF		 2735 if (buflen < PAGE_SIZE) {
2736 /* As long as we're doing a round trip to the server anyway,
2737 * let's be prepared for a page of acl data. */
2738 localpage = alloc_page(GFP_KERNEL);
2739 resp_buf = page_address(localpage);
2740 if (localpage == NULL)
2741 return -ENOMEM;
2742 args.acl_pages[0] = localpage;
2743 args.acl_pgbase = 0;
1d95db8e 2744 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2745 } else {
2746 resp_buf = buf;
2747 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2748 }
aa1870af 2749 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2750 if (ret)
2751 goto out_free;
2752 if (resp_len > args.acl_len)
2753 nfs4_write_cached_acl(inode, NULL, resp_len);
2754 else
2755 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2756 if (buf) {
2757 ret = -ERANGE;
2758 if (resp_len > buflen)
2759 goto out_free;
2760 if (localpage)
2761 memcpy(buf, resp_buf, resp_len);
2762 }
2763 ret = resp_len;
2764out_free:
2765 if (localpage)
2766 __free_page(localpage);
aa1870af
BF		 2767 return ret;
2768}
2769
16b4289c
TM		 2770static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2771{
2772 struct nfs4_exception exception = { };
2773 ssize_t ret;
2774 do {
2775 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2776 if (ret >= 0)
2777 break;
2778 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2779 } while (exception.retry);
2780 return ret;
2781}
2782
e50a1c2e
BF		 2783static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2784{
2785 struct nfs_server *server = NFS_SERVER(inode);
2786 int ret;
2787
2788 if (!nfs4_server_supports_acls(server))
2789 return -EOPNOTSUPP;
2790 ret = nfs_revalidate_inode(server, inode);
2791 if (ret < 0)
2792 return ret;
2793 ret = nfs4_read_cached_acl(inode, buf, buflen);
2794 if (ret != -ENOENT)
2795 return ret;
2796 return nfs4_get_acl_uncached(inode, buf, buflen);
2797}
2798
16b4289c 2799static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2800{
2801 struct nfs_server *server = NFS_SERVER(inode);
2802 struct page *pages[NFS4ACL_MAXPAGES];
2803 struct nfs_setaclargs arg = {
2804 .fh = NFS_FH(inode),
2805 .acl_pages = pages,
2806 .acl_len = buflen,
2807 };
2808 struct rpc_message msg = {
2809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2810 .rpc_argp = &arg,
2811 .rpc_resp = NULL,
2812 };
2813 int ret;
2814
2815 if (!nfs4_server_supports_acls(server))
2816 return -EOPNOTSUPP;
642ac549 2817 nfs_inode_return_delegation(inode);
4b580ee3
BF		 2818 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2819 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
e50a1c2e
BF		 2820 if (ret == 0)
2821 nfs4_write_cached_acl(inode, buf, buflen);
4b580ee3
BF		 2822 return ret;
2823}
2824
16b4289c
TM		 2825static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2826{
2827 struct nfs4_exception exception = { };
2828 int err;
2829 do {
2830 err = nfs4_handle_exception(NFS_SERVER(inode),
2831 __nfs4_proc_set_acl(inode, buf, buflen),
2832 &exception);
2833 } while (exception.retry);
2834 return err;
2835}
2836
1da177e4 2837static int
faf5f49c 2838nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2839{
7539bbab 2840 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2841
2842 if (!clp || task->tk_status >= 0)
2843 return 0;
2844 switch(task->tk_status) {
2845 case -NFS4ERR_STALE_CLIENTID:
2846 case -NFS4ERR_STALE_STATEID:
2847 case -NFS4ERR_EXPIRED:
2848 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2849 nfs4_schedule_state_recovery(clp);
433fbe4c 2850 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2851 rpc_wake_up_task(task);
2852 task->tk_status = 0;
2853 return -EAGAIN;
1da177e4 2854 case -NFS4ERR_DELAY:
006ea73e
CL		 2855 nfs_inc_server_stats((struct nfs_server *) server,
2856 NFSIOS_DELAY);
2857 case -NFS4ERR_GRACE:
1da177e4
LT		 2858 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2859 task->tk_status = 0;
2860 return -EAGAIN;
2861 case -NFS4ERR_OLD_STATEID:
2862 task->tk_status = 0;
2863 return -EAGAIN;
2864 }
2865 task->tk_status = nfs4_map_errors(task->tk_status);
2866 return 0;
2867}
2868
433fbe4c
TM		 2869static int nfs4_wait_bit_interruptible(void *word)
2870{
2871 if (signal_pending(current))
2872 return -ERESTARTSYS;
2873 schedule();
2874 return 0;
2875}
2876
adfa6f98 2877static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2878{
1da177e4 2879 sigset_t oldset;
433fbe4c 2880 int res;
1da177e4
LT		 2881
2882 might_sleep();
2883
2884 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2885 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2886 nfs4_wait_bit_interruptible,
2887 TASK_INTERRUPTIBLE);
1da177e4
LT		 2888 rpc_clnt_sigunmask(clnt, &oldset);
2889 return res;
2890}
2891
2892static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2893{
2894 sigset_t oldset;
2895 int res = 0;
2896
2897 might_sleep();
2898
2899 if (*timeout <= 0)
2900 *timeout = NFS4_POLL_RETRY_MIN;
2901 if (*timeout > NFS4_POLL_RETRY_MAX)
2902 *timeout = NFS4_POLL_RETRY_MAX;
2903 rpc_clnt_sigmask(clnt, &oldset);
2904 if (clnt->cl_intr) {
041e0e3b 2905 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2906 if (signalled())
2907 res = -ERESTARTSYS;
041e0e3b
NA		 2908 } else
2909 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2910 rpc_clnt_sigunmask(clnt, &oldset);
2911 *timeout <<= 1;
2912 return res;
2913}
2914
2915/* This is the error handling routine for processes that are allowed
2916 * to sleep.
2917 */
faf5f49c 2918int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2919{
7539bbab 2920 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2921 int ret = errorcode;
2922
2923 exception->retry = 0;
2924 switch(errorcode) {
2925 case 0:
2926 return 0;
2927 case -NFS4ERR_STALE_CLIENTID:
2928 case -NFS4ERR_STALE_STATEID:
2929 case -NFS4ERR_EXPIRED:
433fbe4c 2930 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2931 ret = nfs4_wait_clnt_recover(server->client, clp);
2932 if (ret == 0)
2933 exception->retry = 1;
2934 break;
2935 case -NFS4ERR_GRACE:
2936 case -NFS4ERR_DELAY:
2937 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2938 if (ret != 0)
2939 break;
1da177e4 2940 case -NFS4ERR_OLD_STATEID:
2c56617d 2941 exception->retry = 1;
1da177e4
LT		 2942 }
2943 /* We failed to handle the error */
2944 return nfs4_map_errors(ret);
2945}
2946
adfa6f98 2947int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2948{
2949 nfs4_verifier sc_verifier;
2950 struct nfs4_setclientid setclientid = {
2951 .sc_verifier = &sc_verifier,
2952 .sc_prog = program,
2953 };
2954 struct rpc_message msg = {
2955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2956 .rpc_argp = &setclientid,
2957 .rpc_resp = clp,
286d7d6a 2958 .rpc_cred = cred,
1da177e4
LT		 2959 };
2960 u32 *p;
2961 int loop = 0;
2962 int status;
2963
2964 p = (u32*)sc_verifier.data;
2965 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2966 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2967
2968 for(;;) {
2969 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2970 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2971 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
286d7d6a 2972 cred->cr_ops->cr_name,
1da177e4
LT		 2973 clp->cl_id_uniquifier);
2974 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2975 sizeof(setclientid.sc_netid), "tcp");
2976 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2977 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2978 clp->cl_ipaddr, port >> 8, port & 255);
2979
2980 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2981 if (status != -NFS4ERR_CLID_INUSE)
2982 break;
2983 if (signalled())
2984 break;
2985 if (loop++ & 1)
2986 ssleep(clp->cl_lease_time + 1);
2987 else
2988 if (++clp->cl_id_uniquifier == 0)
2989 break;
2990 }
2991 return status;
2992}
2993
adfa6f98 2994static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2995{
2996 struct nfs_fsinfo fsinfo;
2997 struct rpc_message msg = {
2998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2999 .rpc_argp = clp,
3000 .rpc_resp = &fsinfo,
286d7d6a 3001 .rpc_cred = cred,
1da177e4
LT		 3002 };
3003 unsigned long now;
3004 int status;
3005
3006 now = jiffies;
3007 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3008 if (status == 0) {
3009 spin_lock(&clp->cl_lock);
3010 clp->cl_lease_time = fsinfo.lease_time * HZ;
3011 clp->cl_last_renewal = now;
58d9714a 3012 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 3013 spin_unlock(&clp->cl_lock);
3014 }
3015 return status;
3016}
3017
adfa6f98 3018int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 3019{
3020 long timeout;
3021 int err;
3022 do {
3023 err = _nfs4_proc_setclientid_confirm(clp, cred);
3024 switch (err) {
3025 case 0:
3026 return err;
3027 case -NFS4ERR_RESOURCE:
3028 /* The IBM lawyers misread another document! */
3029 case -NFS4ERR_DELAY:
3030 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3031 }
3032 } while (err == 0);
3033 return err;
3034}
3035
fe650407
TM		 3036struct nfs4_delegreturndata {
3037 struct nfs4_delegreturnargs args;
fa178f29 3038 struct nfs4_delegreturnres res;
fe650407
TM		 3039 struct nfs_fh fh;
3040 nfs4_stateid stateid;
3041 struct rpc_cred *cred;
26e976a8 3042 unsigned long timestamp;
fa178f29 3043 struct nfs_fattr fattr;
fe650407
TM		 3044 int rpc_status;
3045};
3046
3047static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 3048{
fe650407 3049 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 3050 struct rpc_message msg = {
3051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 3052 .rpc_argp = &data->args,
fa178f29 3053 .rpc_resp = &data->res,
fe650407 3054 .rpc_cred = data->cred,
1da177e4 3055 };
fa178f29 3056 nfs_fattr_init(data->res.fattr);
fe650407
TM		 3057 rpc_call_setup(task, &msg, 0);
3058}
1da177e4 3059
fe650407
TM		 3060static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3061{
3062 struct nfs4_delegreturndata *data = calldata;
3063 data->rpc_status = task->tk_status;
26e976a8 3064 if (data->rpc_status == 0)
fa178f29 3065 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3066}
3067
3068static void nfs4_delegreturn_release(void *calldata)
3069{
3070 struct nfs4_delegreturndata *data = calldata;
3071
3072 put_rpccred(data->cred);
3073 kfree(calldata);
3074}
3075
c8d149f3 3076static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3077 .rpc_call_prepare = nfs4_delegreturn_prepare,
3078 .rpc_call_done = nfs4_delegreturn_done,
3079 .rpc_release = nfs4_delegreturn_release,
3080};
3081
3082static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3083{
3084 struct nfs4_delegreturndata *data;
fa178f29 3085 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 3086 struct rpc_task *task;
3087 int status;
3088
3089 data = kmalloc(sizeof(*data), GFP_KERNEL);
3090 if (data == NULL)
3091 return -ENOMEM;
3092 data->args.fhandle = &data->fh;
3093 data->args.stateid = &data->stateid;
fa178f29 3094 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3095 nfs_copy_fh(&data->fh, NFS_FH(inode));
3096 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3097 data->res.fattr = &data->fattr;
3098 data->res.server = server;
fe650407 3099 data->cred = get_rpccred(cred);
26e976a8 3100 data->timestamp = jiffies;
fe650407
TM		 3101 data->rpc_status = 0;
3102
3103 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 3104 if (IS_ERR(task))
fe650407 3105 return PTR_ERR(task);
fe650407 3106 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 3107 if (status == 0) {
fe650407 3108 status = data->rpc_status;
fa178f29
TM		 3109 if (status == 0)
3110 nfs_post_op_update_inode(inode, &data->fattr);
3111 }
fe650407
TM		 3112 rpc_release_task(task);
3113 return status;
1da177e4
LT		 3114}
3115
3116int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3117{
3118 struct nfs_server *server = NFS_SERVER(inode);
3119 struct nfs4_exception exception = { };
3120 int err;
3121 do {
3122 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3123 switch (err) {
3124 case -NFS4ERR_STALE_STATEID:
3125 case -NFS4ERR_EXPIRED:
7539bbab 3126 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 3127 case 0:
3128 return 0;
3129 }
3130 err = nfs4_handle_exception(server, err, &exception);
3131 } while (exception.retry);
3132 return err;
3133}
3134
3135#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3136#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3137
3138/*
3139 * sleep, with exponential backoff, and retry the LOCK operation.
3140 */
3141static unsigned long
3142nfs4_set_lock_task_retry(unsigned long timeout)
3143{
041e0e3b 3144 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3145 timeout <<= 1;
3146 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3147 return NFS4_LOCK_MAXTIMEOUT;
3148 return timeout;
3149}
3150
1da177e4
LT		 3151static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3152{
3153 struct inode *inode = state->inode;
3154 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3155 struct nfs_client *clp = server->nfs_client;
911d1aaf 3156 struct nfs_lockt_args arg = {
1da177e4 3157 .fh = NFS_FH(inode),
911d1aaf 3158 .fl = request,
1da177e4 3159 };
911d1aaf
TM		 3160 struct nfs_lockt_res res = {
3161 .denied = request,
1da177e4
LT		 3162 };
3163 struct rpc_message msg = {
3164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3165 .rpc_argp = &arg,
3166 .rpc_resp = &res,
3167 .rpc_cred = state->owner->so_cred,
3168 };
1da177e4
LT		 3169 struct nfs4_lock_state *lsp;
3170 int status;
3171
3172 down_read(&clp->cl_sem);
911d1aaf 3173 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3174 status = nfs4_set_lock_state(state, request);
3175 if (status != 0)
3176 goto out;
3177 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3178 arg.lock_owner.id = lsp->ls_id;
1da177e4 3179 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3180 switch (status) {
3181 case 0:
3182 request->fl_type = F_UNLCK;
3183 break;
3184 case -NFS4ERR_DENIED:
3185 status = 0;
1da177e4 3186 }
8d0a8a9d 3187out:
1da177e4
LT		 3188 up_read(&clp->cl_sem);
3189 return status;
3190}
3191
3192static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3193{
3194 struct nfs4_exception exception = { };
3195 int err;
3196
3197 do {
3198 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3199 _nfs4_proc_getlk(state, cmd, request),
3200 &exception);
3201 } while (exception.retry);
3202 return err;
3203}
3204
3205static int do_vfs_lock(struct file *file, struct file_lock *fl)
3206{
3207 int res = 0;
3208 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3209 case FL_POSIX:
3210 res = posix_lock_file_wait(file, fl);
3211 break;
3212 case FL_FLOCK:
3213 res = flock_lock_file_wait(file, fl);
3214 break;
3215 default:
3216 BUG();
3217 }
1da177e4
LT		 3218 return res;
3219}
3220
faf5f49c 3221struct nfs4_unlockdata {
911d1aaf
TM		 3222 struct nfs_locku_args arg;
3223 struct nfs_locku_res res;
faf5f49c
TM		 3224 struct nfs4_lock_state *lsp;
3225 struct nfs_open_context *ctx;
911d1aaf
TM		 3226 struct file_lock fl;
3227 const struct nfs_server *server;
26e976a8 3228 unsigned long timestamp;
faf5f49c
TM		 3229};
3230
911d1aaf
TM		 3231static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3232 struct nfs_open_context *ctx,
3233 struct nfs4_lock_state *lsp,
3234 struct nfs_seqid *seqid)
3235{
3236 struct nfs4_unlockdata *p;
3237 struct inode *inode = lsp->ls_state->inode;
3238
3239 p = kmalloc(sizeof(*p), GFP_KERNEL);
3240 if (p == NULL)
3241 return NULL;
3242 p->arg.fh = NFS_FH(inode);
3243 p->arg.fl = &p->fl;
3244 p->arg.seqid = seqid;
3245 p->arg.stateid = &lsp->ls_stateid;
3246 p->lsp = lsp;
3247 atomic_inc(&lsp->ls_count);
3248 /* Ensure we don't close file until we're done freeing locks! */
3249 p->ctx = get_nfs_open_context(ctx);
3250 memcpy(&p->fl, fl, sizeof(p->fl));
3251 p->server = NFS_SERVER(inode);
3252 return p;
3253}
3254
06f814a3 3255static void nfs4_locku_release_calldata(void *data)
faf5f49c 3256{
963d8fe5 3257 struct nfs4_unlockdata *calldata = data;
911d1aaf 3258 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3259 nfs4_put_lock_state(calldata->lsp);
3260 put_nfs_open_context(calldata->ctx);
3261 kfree(calldata);
faf5f49c
TM		 3262}
3263
963d8fe5 3264static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3265{
963d8fe5 3266 struct nfs4_unlockdata *calldata = data;
faf5f49c 3267
06f814a3
TM		 3268 if (RPC_ASSASSINATED(task))
3269 return;
911d1aaf 3270 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3271 switch (task->tk_status) {
3272 case 0:
3273 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3274 calldata->res.stateid.data,
faf5f49c 3275 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3276 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3277 break;
3278 case -NFS4ERR_STALE_STATEID:
3279 case -NFS4ERR_EXPIRED:
7539bbab 3280 nfs4_schedule_state_recovery(calldata->server->nfs_client);
faf5f49c
TM		 3281 break;
3282 default:
911d1aaf 3283 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
faf5f49c 3284 rpc_restart_call(task);
faf5f49c
TM		 3285 }
3286 }
faf5f49c
TM		 3287}
3288
4ce70ada 3289static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3290{
4ce70ada 3291 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3292 struct rpc_message msg = {
3293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3294 .rpc_argp = &calldata->arg,
3295 .rpc_resp = &calldata->res,
3296 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3297 };
faf5f49c 3298
911d1aaf 3299 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3300 return;
3301 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3302 /* Note: exit _without_ running nfs4_locku_done */
3303 task->tk_action = NULL;
faf5f49c
TM		 3304 return;
3305 }
26e976a8 3306 calldata->timestamp = jiffies;
faf5f49c
TM		 3307 rpc_call_setup(task, &msg, 0);
3308}
3309
963d8fe5 3310static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3311 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3312 .rpc_call_done = nfs4_locku_done,
06f814a3 3313 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3314};
3315
a5d16a4d
TM		 3316static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3317 struct nfs_open_context *ctx,
3318 struct nfs4_lock_state *lsp,
3319 struct nfs_seqid *seqid)
3320{
3321 struct nfs4_unlockdata *data;
a5d16a4d
TM		 3322
3323 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3324 if (data == NULL) {
3325 nfs_free_seqid(seqid);
3326 return ERR_PTR(-ENOMEM);
3327 }
3328
7a1218a2 3329 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM		 3330}
3331
faf5f49c
TM		 3332static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3333{
911d1aaf 3334 struct nfs_seqid *seqid;
1da177e4 3335 struct nfs4_lock_state *lsp;
06f814a3
TM		 3336 struct rpc_task *task;
3337 int status = 0;
faf5f49c 3338
8d0a8a9d 3339 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3340 /* Unlock _before_ we do the RPC call */
3341 request->fl_flags |= FL_EXISTS;
3342 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3343 goto out;
8d0a8a9d 3344 if (status != 0)
9b073574
TM		 3345 goto out;
3346 /* Is this a delegated lock? */
3347 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3348 goto out;
8d0a8a9d 3349 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3350 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3351 status = -ENOMEM;
911d1aaf 3352 if (seqid == NULL)
9b073574 3353 goto out;
a5d16a4d
TM		 3354 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3355 status = PTR_ERR(task);
3356 if (IS_ERR(task))
9b073574 3357 goto out;
a5d16a4d
TM		 3358 status = nfs4_wait_for_completion_rpc_task(task);
3359 rpc_release_task(task);
9b073574 3360out:
1da177e4
LT		 3361 return status;
3362}
3363
a5d16a4d
TM		 3364struct nfs4_lockdata {
3365 struct nfs_lock_args arg;
3366 struct nfs_lock_res res;
3367 struct nfs4_lock_state *lsp;
3368 struct nfs_open_context *ctx;
3369 struct file_lock fl;
26e976a8 3370 unsigned long timestamp;
a5d16a4d
TM		 3371 int rpc_status;
3372 int cancelled;
3373};
3374
3375static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3376 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3377{
a5d16a4d
TM		 3378 struct nfs4_lockdata *p;
3379 struct inode *inode = lsp->ls_state->inode;
1da177e4 3380 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3381
3382 p = kzalloc(sizeof(*p), GFP_KERNEL);
3383 if (p == NULL)
3384 return NULL;
3385
3386 p->arg.fh = NFS_FH(inode);
3387 p->arg.fl = &p->fl;
3388 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3389 if (p->arg.lock_seqid == NULL)
3390 goto out_free;
3391 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3392 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
a5d16a4d
TM		 3393 p->arg.lock_owner.id = lsp->ls_id;
3394 p->lsp = lsp;
3395 atomic_inc(&lsp->ls_count);
3396 p->ctx = get_nfs_open_context(ctx);
3397 memcpy(&p->fl, fl, sizeof(p->fl));
3398 return p;
3399out_free:
3400 kfree(p);
3401 return NULL;
3402}
3403
3404static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3405{
3406 struct nfs4_lockdata *data = calldata;
3407 struct nfs4_state *state = data->lsp->ls_state;
3408 struct nfs4_state_owner *sp = state->owner;
1da177e4 3409 struct rpc_message msg = {
a5d16a4d
TM		 3410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3411 .rpc_argp = &data->arg,
3412 .rpc_resp = &data->res,
3413 .rpc_cred = sp->so_cred,
1da177e4 3414 };
06735b34 3415
a5d16a4d
TM		 3416 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3417 return;
3418 dprintk("%s: begin!\n", __FUNCTION__);
3419 /* Do we need to do an open_to_lock_owner? */
3420 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3421 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3422 if (data->arg.open_seqid == NULL) {
3423 data->rpc_status = -ENOMEM;
3424 task->tk_action = NULL;
06735b34 3425 goto out;
8d0a8a9d 3426 }
a5d16a4d
TM		 3427 data->arg.open_stateid = &state->stateid;
3428 data->arg.new_lock_owner = 1;
3429 }
26e976a8 3430 data->timestamp = jiffies;
a5d16a4d 3431 rpc_call_setup(task, &msg, 0);
06735b34 3432out:
a5d16a4d
TM		 3433 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3434}
3435
3436static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3437{
3438 struct nfs4_lockdata *data = calldata;
3439
3440 dprintk("%s: begin!\n", __FUNCTION__);
3441
3442 data->rpc_status = task->tk_status;
3443 if (RPC_ASSASSINATED(task))
3444 goto out;
3445 if (data->arg.new_lock_owner != 0) {
3446 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3447 if (data->rpc_status == 0)
3448 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3449 else
3450 goto out;
3451 }
3452 if (data->rpc_status == 0) {
3453 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3454 sizeof(data->lsp->ls_stateid.data));
3455 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
26e976a8 3456 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3457 }
3458 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3459out:
3460 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3461}
3462
3463static void nfs4_lock_release(void *calldata)
3464{
3465 struct nfs4_lockdata *data = calldata;
3466
3467 dprintk("%s: begin!\n", __FUNCTION__);
3468 if (data->arg.open_seqid != NULL)
3469 nfs_free_seqid(data->arg.open_seqid);
3470 if (data->cancelled != 0) {
3471 struct rpc_task *task;
3472 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3473 data->arg.lock_seqid);
3474 if (!IS_ERR(task))
3475 rpc_release_task(task);
3476 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3477 } else
3478 nfs_free_seqid(data->arg.lock_seqid);
3479 nfs4_put_lock_state(data->lsp);
3480 put_nfs_open_context(data->ctx);
3481 kfree(data);
3482 dprintk("%s: done!\n", __FUNCTION__);
3483}
3484
3485static const struct rpc_call_ops nfs4_lock_ops = {
3486 .rpc_call_prepare = nfs4_lock_prepare,
3487 .rpc_call_done = nfs4_lock_done,
3488 .rpc_release = nfs4_lock_release,
3489};
3490
3491static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3492{
3493 struct nfs4_lockdata *data;
3494 struct rpc_task *task;
3495 int ret;
3496
3497 dprintk("%s: begin!\n", __FUNCTION__);
3498 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3499 fl->fl_u.nfs4_fl.owner);
3500 if (data == NULL)
3501 return -ENOMEM;
3502 if (IS_SETLKW(cmd))
3503 data->arg.block = 1;
3504 if (reclaim != 0)
3505 data->arg.reclaim = 1;
3506 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3507 &nfs4_lock_ops, data);
7a1218a2 3508 if (IS_ERR(task))
a5d16a4d 3509 return PTR_ERR(task);
a5d16a4d
TM		 3510 ret = nfs4_wait_for_completion_rpc_task(task);
3511 if (ret == 0) {
3512 ret = data->rpc_status;
3513 if (ret == -NFS4ERR_DENIED)
3514 ret = -EAGAIN;
3515 } else
3516 data->cancelled = 1;
3517 rpc_release_task(task);
3518 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3519 return ret;
1da177e4
LT		 3520}
3521
3522static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3523{
202b50dc
TM		 3524 struct nfs_server *server = NFS_SERVER(state->inode);
3525 struct nfs4_exception exception = { };
3526 int err;
3527
3528 do {
42a2d13e
TM		 3529 /* Cache the lock if possible... */
3530 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3531 return 0;
202b50dc
TM		 3532 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3533 if (err != -NFS4ERR_DELAY)
3534 break;
3535 nfs4_handle_exception(server, err, &exception);
3536 } while (exception.retry);
3537 return err;
1da177e4
LT		 3538}
3539
3540static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3541{
202b50dc
TM		 3542 struct nfs_server *server = NFS_SERVER(state->inode);
3543 struct nfs4_exception exception = { };
3544 int err;
3545
6bfc93ef
TM		 3546 err = nfs4_set_lock_state(state, request);
3547 if (err != 0)
3548 return err;
202b50dc 3549 do {
42a2d13e
TM		 3550 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3551 return 0;
202b50dc
TM		 3552 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3553 if (err != -NFS4ERR_DELAY)
3554 break;
3555 nfs4_handle_exception(server, err, &exception);
3556 } while (exception.retry);
3557 return err;
1da177e4
LT		 3558}
3559
3560static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3561{
adfa6f98 3562 struct nfs_client *clp = state->owner->so_client;
01c3b861 3563 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3564 int status;
3565
6bfc93ef 3566 /* Is this a delegated open? */
6bfc93ef
TM		 3567 status = nfs4_set_lock_state(state, request);
3568 if (status != 0)
3569 goto out;
01c3b861
TM		 3570 request->fl_flags |= FL_ACCESS;
3571 status = do_vfs_lock(request->fl_file, request);
3572 if (status < 0)
3573 goto out;
3574 down_read(&clp->cl_sem);
3575 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3576 struct nfs_inode *nfsi = NFS_I(state->inode);
3577 /* Yes: cache locks! */
3578 down_read(&nfsi->rwsem);
3579 /* ...but avoid races with delegation recall... */
3580 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3581 request->fl_flags = fl_flags & ~FL_SLEEP;
3582 status = do_vfs_lock(request->fl_file, request);
3583 up_read(&nfsi->rwsem);
3584 goto out_unlock;
3585 }
3586 up_read(&nfsi->rwsem);
3587 }
6bfc93ef
TM		 3588 status = _nfs4_do_setlk(state, cmd, request, 0);
3589 if (status != 0)
01c3b861 3590 goto out_unlock;
6bfc93ef 3591 /* Note: we always want to sleep here! */
01c3b861 3592 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3593 if (do_vfs_lock(request->fl_file, request) < 0)
3594 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3595out_unlock:
1da177e4 3596 up_read(&clp->cl_sem);
01c3b861
TM		 3597out:
3598 request->fl_flags = fl_flags;
1da177e4
LT		 3599 return status;
3600}
3601
3602static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3603{
3604 struct nfs4_exception exception = { };
3605 int err;
3606
3607 do {
3608 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3609 _nfs4_proc_setlk(state, cmd, request),
3610 &exception);
3611 } while (exception.retry);
3612 return err;
3613}
3614
3615static int
3616nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3617{
3618 struct nfs_open_context *ctx;
3619 struct nfs4_state *state;
3620 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3621 int status;
3622
3623 /* verify open state */
3624 ctx = (struct nfs_open_context *)filp->private_data;
3625 state = ctx->state;
3626
3627 if (request->fl_start < 0 || request->fl_end < 0)
3628 return -EINVAL;
3629
3630 if (IS_GETLK(cmd))
3631 return nfs4_proc_getlk(state, F_GETLK, request);
3632
3633 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3634 return -EINVAL;
3635
3636 if (request->fl_type == F_UNLCK)
3637 return nfs4_proc_unlck(state, cmd, request);
3638
3639 do {
3640 status = nfs4_proc_setlk(state, cmd, request);
3641 if ((status != -EAGAIN) || IS_SETLK(cmd))
3642 break;
3643 timeout = nfs4_set_lock_task_retry(timeout);
3644 status = -ERESTARTSYS;
3645 if (signalled())
3646 break;
3647 } while(status < 0);
1da177e4
LT		 3648 return status;
3649}
3650
888e694c
TM		 3651int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3652{
3653 struct nfs_server *server = NFS_SERVER(state->inode);
3654 struct nfs4_exception exception = { };
3655 int err;
3656
3657 err = nfs4_set_lock_state(state, fl);
3658 if (err != 0)
3659 goto out;
3660 do {
3661 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3662 if (err != -NFS4ERR_DELAY)
3663 break;
3664 err = nfs4_handle_exception(server, err, &exception);
3665 } while (exception.retry);
3666out:
3667 return err;
3668}
6b3b5496 3669
aa1870af
BF		 3670#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3671
6b3b5496
BF		 3672int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3673 size_t buflen, int flags)
3674{
4b580ee3
BF		 3675 struct inode *inode = dentry->d_inode;
3676
3677 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3678 return -EOPNOTSUPP;
3679
3680 if (!S_ISREG(inode->i_mode) &&
3681 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3682 return -EPERM;
3683
3684 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3685}
3686
3687/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3688 * and that's what we'll do for e.g. user attributes that haven't been set.
3689 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3690 * attributes in kernel-managed attribute namespaces. */
3691ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3692 size_t buflen)
3693{
aa1870af
BF		 3694 struct inode *inode = dentry->d_inode;
3695
3696 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3697 return -EOPNOTSUPP;
3698
3699 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3700}
3701
3702ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3703{
aa1870af 3704 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3705
096455a2
BF		 3706 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3707 return 0;
6b3b5496
BF		 3708 if (buf && buflen < len)
3709 return -ERANGE;
3710 if (buf)
aa1870af
BF		 3711 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3712 return len;
6b3b5496
BF		 3713}
3714
683b57b4 3715int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
7aaa0b3b 3716 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3717{
3718 struct nfs_server *server = NFS_SERVER(dir);
3719 u32 bitmask[2] = {
361e624f
MN		 3720 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3721 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3722 };
3723 struct nfs4_fs_locations_arg args = {
3724 .dir_fh = NFS_FH(dir),
3725 .name = &dentry->d_name,
3726 .page = page,
3727 .bitmask = bitmask,
3728 };
3729 struct rpc_message msg = {
3730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3731 .rpc_argp = &args,
7aaa0b3b 3732 .rpc_resp = fs_locations,
683b57b4
TM		 3733 };
3734 int status;
3735
3736 dprintk("%s: start\n", __FUNCTION__);
3737 fs_locations->fattr.valid = 0;
3738 fs_locations->server = server;
830b8e33 3739 fs_locations->nlocations = 0;
683b57b4
TM		 3740 status = rpc_call_sync(server->client, &msg, 0);
3741 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3742 return status;
3743}
3744
1da177e4
LT		 3745struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3746 .recover_open = nfs4_open_reclaim,
3747 .recover_lock = nfs4_lock_reclaim,
3748};
3749
3750struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3751 .recover_open = nfs4_open_expired,
3752 .recover_lock = nfs4_lock_expired,
3753};
3754
6b3b5496
BF		 3755static struct inode_operations nfs4_file_inode_operations = {
3756 .permission = nfs_permission,
3757 .getattr = nfs_getattr,
3758 .setattr = nfs_setattr,
3759 .getxattr = nfs4_getxattr,
3760 .setxattr = nfs4_setxattr,
3761 .listxattr = nfs4_listxattr,
3762};
3763
1da177e4
LT		 3764struct nfs_rpc_ops nfs_v4_clientops = {
3765 .version = 4, /* protocol version */
3766 .dentry_ops = &nfs4_dentry_operations,
3767 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3768 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3769 .getroot = nfs4_proc_get_root,
3770 .getattr = nfs4_proc_getattr,
3771 .setattr = nfs4_proc_setattr,
2b3de441 3772 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3773 .lookup = nfs4_proc_lookup,
3774 .access = nfs4_proc_access,
3775 .readlink = nfs4_proc_readlink,
3776 .read = nfs4_proc_read,
3777 .write = nfs4_proc_write,
3778 .commit = nfs4_proc_commit,
3779 .create = nfs4_proc_create,
3780 .remove = nfs4_proc_remove,
3781 .unlink_setup = nfs4_proc_unlink_setup,
3782 .unlink_done = nfs4_proc_unlink_done,
3783 .rename = nfs4_proc_rename,
3784 .link = nfs4_proc_link,
3785 .symlink = nfs4_proc_symlink,
3786 .mkdir = nfs4_proc_mkdir,
3787 .rmdir = nfs4_proc_remove,
3788 .readdir = nfs4_proc_readdir,
3789 .mknod = nfs4_proc_mknod,
3790 .statfs = nfs4_proc_statfs,
3791 .fsinfo = nfs4_proc_fsinfo,
3792 .pathconf = nfs4_proc_pathconf,
e9326dca 3793 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3794 .decode_dirent = nfs4_decode_dirent,
3795 .read_setup = nfs4_proc_read_setup,
ec06c096 3796 .read_done = nfs4_read_done,
1da177e4 3797 .write_setup = nfs4_proc_write_setup,
788e7a89 3798 .write_done = nfs4_write_done,
1da177e4 3799 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3800 .commit_done = nfs4_commit_done,
02a913a7
TM		 3801 .file_open = nfs_open,
3802 .file_release = nfs_release,
1da177e4 3803 .lock = nfs4_proc_lock,
e50a1c2e 3804 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3805};
3806
3807/*
3808 * Local variables:
3809 * c-basic-offset: 8
3810 * End:
3811 */
kernel source for telekom puls (alcatel/mediatek)