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NFSv4: Ensure client submounts when following a referral
[net-next-2.6.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);
58d9714a 67static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp);
1da177e4
LT		 68extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
69extern struct rpc_procinfo nfs4_procedures[];
70
1da177e4
LT		 71/* Prevent leaks of NFSv4 errors into userland */
72int nfs4_map_errors(int err)
73{
74 if (err < -1000) {
75 dprintk("%s could not handle NFSv4 error %d\n",
76 __FUNCTION__, -err);
77 return -EIO;
78 }
79 return err;
80}
81
82/*
83 * This is our standard bitmap for GETATTR requests.
84 */
85const u32 nfs4_fattr_bitmap[2] = {
86 FATTR4_WORD0_TYPE
87 | FATTR4_WORD0_CHANGE
88 | FATTR4_WORD0_SIZE
89 | FATTR4_WORD0_FSID
90 | FATTR4_WORD0_FILEID,
91 FATTR4_WORD1_MODE
92 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER
94 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_RAWDEV
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
100};
101
102const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
109};
110
4ce79717 111const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 112 FATTR4_WORD0_MAXLINK
113 | FATTR4_WORD0_MAXNAME,
114 0
115};
116
117const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
121 0
122};
123
830b8e33
MN		 124const u32 nfs4_fs_locations_bitmap[2] = {
125 FATTR4_WORD0_TYPE
126 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_SIZE
128 | FATTR4_WORD0_FSID
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
131 FATTR4_WORD1_MODE
132 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
141};
142
1da177e4
LT		 143static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
144 struct nfs4_readdir_arg *readdir)
145{
146 u32 *start, *p;
147
148 BUG_ON(readdir->count < 80);
149 if (cookie > 2) {
b7ef1956 150 readdir->cookie = cookie;
1da177e4
LT		 151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
152 return;
153 }
154
155 readdir->cookie = 0;
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
157 if (cookie == 2)
158 return;
159
160 /*
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
165 * instead of 1 or 2.
166 */
167 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
168
169 if (cookie == 0) {
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
175 p++;
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
179 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
180 }
181
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
187 p++;
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
191 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
192
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
196}
197
26e976a8 198static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4
LT		 199{
200 struct nfs4_client *clp = server->nfs4_state;
201 spin_lock(&clp->cl_lock);
202 if (time_before(clp->cl_last_renewal,timestamp))
203 clp->cl_last_renewal = timestamp;
204 spin_unlock(&clp->cl_lock);
205}
206
38478b24 207static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 208{
38478b24 209 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 210
38478b24
TM		 211 spin_lock(&dir->i_lock);
212 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
1da177e4
LT		 213 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
214 nfsi->change_attr = cinfo->after;
38478b24 215 spin_unlock(&dir->i_lock);
1da177e4
LT		 216}
217
e56e0b78 218struct nfs4_opendata {
24ac23ab 219 atomic_t count;
e56e0b78
TM		 220 struct nfs_openargs o_arg;
221 struct nfs_openres o_res;
cdd4e68b
TM		 222 struct nfs_open_confirmargs c_arg;
223 struct nfs_open_confirmres c_res;
e56e0b78
TM		 224 struct nfs_fattr f_attr;
225 struct nfs_fattr dir_attr;
226 struct dentry *dentry;
227 struct dentry *dir;
228 struct nfs4_state_owner *owner;
229 struct iattr attrs;
26e976a8 230 unsigned long timestamp;
24ac23ab
TM		 231 int rpc_status;
232 int cancelled;
e56e0b78
TM		 233};
234
235static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
236 struct nfs4_state_owner *sp, int flags,
237 const struct iattr *attrs)
238{
239 struct dentry *parent = dget_parent(dentry);
240 struct inode *dir = parent->d_inode;
241 struct nfs_server *server = NFS_SERVER(dir);
242 struct nfs4_opendata *p;
243
244 p = kzalloc(sizeof(*p), GFP_KERNEL);
245 if (p == NULL)
246 goto err;
247 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
248 if (p->o_arg.seqid == NULL)
249 goto err_free;
24ac23ab 250 atomic_set(&p->count, 1);
e56e0b78
TM		 251 p->dentry = dget(dentry);
252 p->dir = parent;
253 p->owner = sp;
254 atomic_inc(&sp->so_count);
255 p->o_arg.fh = NFS_FH(dir);
256 p->o_arg.open_flags = flags,
257 p->o_arg.clientid = server->nfs4_state->cl_clientid;
258 p->o_arg.id = sp->so_id;
259 p->o_arg.name = &dentry->d_name;
260 p->o_arg.server = server;
261 p->o_arg.bitmask = server->attr_bitmask;
262 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
263 p->o_res.f_attr = &p->f_attr;
264 p->o_res.dir_attr = &p->dir_attr;
265 p->o_res.server = server;
266 nfs_fattr_init(&p->f_attr);
267 nfs_fattr_init(&p->dir_attr);
268 if (flags & O_EXCL) {
269 u32 *s = (u32 *) p->o_arg.u.verifier.data;
270 s[0] = jiffies;
271 s[1] = current->pid;
272 } else if (flags & O_CREAT) {
273 p->o_arg.u.attrs = &p->attrs;
274 memcpy(&p->attrs, attrs, sizeof(p->attrs));
275 }
cdd4e68b
TM		 276 p->c_arg.fh = &p->o_res.fh;
277 p->c_arg.stateid = &p->o_res.stateid;
278 p->c_arg.seqid = p->o_arg.seqid;
e56e0b78
TM		 279 return p;
280err_free:
281 kfree(p);
282err:
283 dput(parent);
284 return NULL;
285}
286
287static void nfs4_opendata_free(struct nfs4_opendata *p)
288{
24ac23ab 289 if (p != NULL && atomic_dec_and_test(&p->count)) {
e56e0b78
TM		 290 nfs_free_seqid(p->o_arg.seqid);
291 nfs4_put_state_owner(p->owner);
292 dput(p->dir);
293 dput(p->dentry);
294 kfree(p);
295 }
296}
297
9512135d 298/* Helper for asynchronous RPC calls */
4ce70ada 299static int nfs4_call_async(struct rpc_clnt *clnt,
963d8fe5 300 const struct rpc_call_ops *tk_ops, void *calldata)
9512135d
TM		 301{
302 struct rpc_task *task;
303
963d8fe5 304 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
9512135d 305 return -ENOMEM;
9512135d
TM		 306 rpc_execute(task);
307 return 0;
308}
309
06f814a3
TM		 310static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
311{
312 sigset_t oldset;
313 int ret;
314
315 rpc_clnt_sigmask(task->tk_client, &oldset);
316 ret = rpc_wait_for_completion_task(task);
317 rpc_clnt_sigunmask(task->tk_client, &oldset);
318 return ret;
319}
320
e7616923
TM		 321static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
322{
323 switch (open_flags) {
324 case FMODE_WRITE:
325 state->n_wronly++;
326 break;
327 case FMODE_READ:
328 state->n_rdonly++;
329 break;
330 case FMODE_READ|FMODE_WRITE:
331 state->n_rdwr++;
332 }
333}
334
1da177e4
LT		 335static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
336{
337 struct inode *inode = state->inode;
338
339 open_flags &= (FMODE_READ|FMODE_WRITE);
d530838b 340 /* Protect against nfs4_find_state_byowner() */
ec073428 341 spin_lock(&state->owner->so_lock);
1da177e4 342 spin_lock(&inode->i_lock);
4cecb76f 343 memcpy(&state->stateid, stateid, sizeof(state->stateid));
e7616923 344 update_open_stateflags(state, open_flags);
4cecb76f 345 nfs4_state_set_mode_locked(state, state->state | open_flags);
1da177e4 346 spin_unlock(&inode->i_lock);
ec073428 347 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 348}
349
24ac23ab
TM		 350static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
351{
352 struct inode *inode;
353 struct nfs4_state *state = NULL;
354
355 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
356 goto out;
357 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
03f28e3a 358 if (IS_ERR(inode))
24ac23ab
TM		 359 goto out;
360 state = nfs4_get_open_state(inode, data->owner);
361 if (state == NULL)
362 goto put_inode;
363 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
364put_inode:
365 iput(inode);
366out:
367 return state;
368}
369
864472e9
TM		 370static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
371{
372 struct nfs_inode *nfsi = NFS_I(state->inode);
373 struct nfs_open_context *ctx;
374
375 spin_lock(&state->inode->i_lock);
376 list_for_each_entry(ctx, &nfsi->open_files, list) {
377 if (ctx->state != state)
378 continue;
379 get_nfs_open_context(ctx);
380 spin_unlock(&state->inode->i_lock);
381 return ctx;
382 }
383 spin_unlock(&state->inode->i_lock);
384 return ERR_PTR(-ENOENT);
385}
386
387static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
388{
389 int ret;
390
391 opendata->o_arg.open_flags = openflags;
392 ret = _nfs4_proc_open(opendata);
393 if (ret != 0)
394 return ret;
395 memcpy(stateid->data, opendata->o_res.stateid.data,
396 sizeof(stateid->data));
397 return 0;
398}
399
400static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
401{
402 nfs4_stateid stateid;
403 struct nfs4_state *newstate;
404 int mode = 0;
405 int delegation = 0;
406 int ret;
407
408 /* memory barrier prior to reading state->n_* */
409 smp_rmb();
410 if (state->n_rdwr != 0) {
411 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
412 if (ret != 0)
413 return ret;
414 mode |= FMODE_READ|FMODE_WRITE;
415 if (opendata->o_res.delegation_type != 0)
416 delegation = opendata->o_res.delegation_type;
417 smp_rmb();
418 }
419 if (state->n_wronly != 0) {
420 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
421 if (ret != 0)
422 return ret;
423 mode |= FMODE_WRITE;
424 if (opendata->o_res.delegation_type != 0)
425 delegation = opendata->o_res.delegation_type;
426 smp_rmb();
427 }
428 if (state->n_rdonly != 0) {
429 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
430 if (ret != 0)
431 return ret;
432 mode |= FMODE_READ;
433 }
434 clear_bit(NFS_DELEGATED_STATE, &state->flags);
435 if (mode == 0)
436 return 0;
437 if (opendata->o_res.delegation_type == 0)
438 opendata->o_res.delegation_type = delegation;
439 opendata->o_arg.open_flags |= mode;
440 newstate = nfs4_opendata_to_nfs4_state(opendata);
441 if (newstate != NULL) {
442 if (opendata->o_res.delegation_type != 0) {
443 struct nfs_inode *nfsi = NFS_I(newstate->inode);
444 int delegation_flags = 0;
445 if (nfsi->delegation)
446 delegation_flags = nfsi->delegation->flags;
447 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
448 nfs_inode_set_delegation(newstate->inode,
449 opendata->owner->so_cred,
450 &opendata->o_res);
451 else
452 nfs_inode_reclaim_delegation(newstate->inode,
453 opendata->owner->so_cred,
454 &opendata->o_res);
455 }
456 nfs4_close_state(newstate, opendata->o_arg.open_flags);
457 }
458 if (newstate != state)
459 return -ESTALE;
460 return 0;
461}
462
1da177e4
LT		 463/*
464 * OPEN_RECLAIM:
465 * reclaim state on the server after a reboot.
1da177e4 466 */
864472e9 467static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4 468{
864472e9
TM		 469 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
470 struct nfs4_opendata *opendata;
471 int delegation_type = 0;
1da177e4
LT		 472 int status;
473
474 if (delegation != NULL) {
475 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
476 memcpy(&state->stateid, &delegation->stateid,
477 sizeof(state->stateid));
478 set_bit(NFS_DELEGATED_STATE, &state->flags);
479 return 0;
480 }
864472e9 481 delegation_type = delegation->type;
1da177e4 482 }
864472e9
TM		 483 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
484 if (opendata == NULL)
cee54fc9 485 return -ENOMEM;
864472e9
TM		 486 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
487 opendata->o_arg.fh = NFS_FH(state->inode);
488 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
489 opendata->o_arg.u.delegation_type = delegation_type;
490 status = nfs4_open_recover(opendata, state);
491 nfs4_opendata_free(opendata);
1da177e4
LT		 492 return status;
493}
494
864472e9 495static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4
LT		 496{
497 struct nfs_server *server = NFS_SERVER(state->inode);
498 struct nfs4_exception exception = { };
499 int err;
500 do {
864472e9 501 err = _nfs4_do_open_reclaim(sp, state, dentry);
202b50dc
TM		 502 if (err != -NFS4ERR_DELAY)
503 break;
504 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 505 } while (exception.retry);
506 return err;
507}
508
864472e9
TM		 509static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
510{
511 struct nfs_open_context *ctx;
512 int ret;
513
514 ctx = nfs4_state_find_open_context(state);
515 if (IS_ERR(ctx))
516 return PTR_ERR(ctx);
517 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
518 put_nfs_open_context(ctx);
519 return ret;
520}
521
1da177e4
LT		 522static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
523{
524 struct nfs4_state_owner *sp = state->owner;
e56e0b78 525 struct nfs4_opendata *opendata;
864472e9 526 int ret;
1da177e4 527
1da177e4 528 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
864472e9
TM		 529 return 0;
530 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
e56e0b78 531 if (opendata == NULL)
864472e9 532 return -ENOMEM;
e56e0b78 533 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
e56e0b78
TM		 534 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
535 sizeof(opendata->o_arg.u.delegation.data));
864472e9 536 ret = nfs4_open_recover(opendata, state);
e56e0b78 537 nfs4_opendata_free(opendata);
864472e9 538 return ret;
1da177e4
LT		 539}
540
541int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
542{
543 struct nfs4_exception exception = { };
544 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
545 int err;
546 do {
547 err = _nfs4_open_delegation_recall(dentry, state);
548 switch (err) {
549 case 0:
550 return err;
551 case -NFS4ERR_STALE_CLIENTID:
552 case -NFS4ERR_STALE_STATEID:
553 case -NFS4ERR_EXPIRED:
554 /* Don't recall a delegation if it was lost */
555 nfs4_schedule_state_recovery(server->nfs4_state);
556 return err;
557 }
558 err = nfs4_handle_exception(server, err, &exception);
559 } while (exception.retry);
560 return err;
561}
562
cdd4e68b 563static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 564{
cdd4e68b
TM		 565 struct nfs4_opendata *data = calldata;
566 struct rpc_message msg = {
567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
568 .rpc_argp = &data->c_arg,
569 .rpc_resp = &data->c_res,
570 .rpc_cred = data->owner->so_cred,
1da177e4 571 };
26e976a8 572 data->timestamp = jiffies;
cdd4e68b
TM		 573 rpc_call_setup(task, &msg, 0);
574}
575
576static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
577{
578 struct nfs4_opendata *data = calldata;
579
580 data->rpc_status = task->tk_status;
581 if (RPC_ASSASSINATED(task))
582 return;
26e976a8 583 if (data->rpc_status == 0) {
cdd4e68b
TM		 584 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
585 sizeof(data->o_res.stateid.data));
26e976a8
TM		 586 renew_lease(data->o_res.server, data->timestamp);
587 }
cdd4e68b
TM		 588 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
589 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
590}
591
592static void nfs4_open_confirm_release(void *calldata)
593{
594 struct nfs4_opendata *data = calldata;
595 struct nfs4_state *state = NULL;
596
597 /* If this request hasn't been cancelled, do nothing */
598 if (data->cancelled == 0)
599 goto out_free;
600 /* In case of error, no cleanup! */
601 if (data->rpc_status != 0)
602 goto out_free;
603 nfs_confirm_seqid(&data->owner->so_seqid, 0);
604 state = nfs4_opendata_to_nfs4_state(data);
605 if (state != NULL)
606 nfs4_close_state(state, data->o_arg.open_flags);
607out_free:
608 nfs4_opendata_free(data);
609}
610
611static const struct rpc_call_ops nfs4_open_confirm_ops = {
612 .rpc_call_prepare = nfs4_open_confirm_prepare,
613 .rpc_call_done = nfs4_open_confirm_done,
614 .rpc_release = nfs4_open_confirm_release,
615};
616
617/*
618 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
619 */
620static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
621{
622 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
623 struct rpc_task *task;
1da177e4
LT		 624 int status;
625
cdd4e68b 626 atomic_inc(&data->count);
7a1218a2
TM		 627 /*
628 * If rpc_run_task() ends up calling ->rpc_release(), we
629 * want to ensure that it takes the 'error' code path.
630 */
631 data->rpc_status = -ENOMEM;
cdd4e68b 632 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
7a1218a2 633 if (IS_ERR(task))
cdd4e68b 634 return PTR_ERR(task);
cdd4e68b
TM		 635 status = nfs4_wait_for_completion_rpc_task(task);
636 if (status != 0) {
637 data->cancelled = 1;
638 smp_wmb();
639 } else
640 status = data->rpc_status;
641 rpc_release_task(task);
1da177e4
LT		 642 return status;
643}
644
24ac23ab 645static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 646{
24ac23ab
TM		 647 struct nfs4_opendata *data = calldata;
648 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 649 struct rpc_message msg = {
650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 651 .rpc_argp = &data->o_arg,
652 .rpc_resp = &data->o_res,
1da177e4
LT		 653 .rpc_cred = sp->so_cred,
654 };
24ac23ab
TM		 655
656 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
657 return;
658 /* Update sequence id. */
659 data->o_arg.id = sp->so_id;
660 data->o_arg.clientid = sp->so_client->cl_clientid;
864472e9
TM		 661 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
662 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
26e976a8 663 data->timestamp = jiffies;
24ac23ab
TM		 664 rpc_call_setup(task, &msg, 0);
665}
1da177e4 666
24ac23ab
TM		 667static void nfs4_open_done(struct rpc_task *task, void *calldata)
668{
669 struct nfs4_opendata *data = calldata;
1da177e4 670
24ac23ab
TM		 671 data->rpc_status = task->tk_status;
672 if (RPC_ASSASSINATED(task))
673 return;
674 if (task->tk_status == 0) {
675 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 676 case S_IFREG:
677 break;
678 case S_IFLNK:
24ac23ab 679 data->rpc_status = -ELOOP;
6f926b5b
TM		 680 break;
681 case S_IFDIR:
24ac23ab 682 data->rpc_status = -EISDIR;
6f926b5b
TM		 683 break;
684 default:
24ac23ab 685 data->rpc_status = -ENOTDIR;
6f926b5b 686 }
26e976a8 687 renew_lease(data->o_res.server, data->timestamp);
6f926b5b 688 }
24ac23ab
TM		 689 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
690}
6f926b5b 691
24ac23ab
TM		 692static void nfs4_open_release(void *calldata)
693{
694 struct nfs4_opendata *data = calldata;
695 struct nfs4_state *state = NULL;
696
697 /* If this request hasn't been cancelled, do nothing */
698 if (data->cancelled == 0)
699 goto out_free;
700 /* In case of error, no cleanup! */
701 if (data->rpc_status != 0)
702 goto out_free;
703 /* In case we need an open_confirm, no cleanup! */
704 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
705 goto out_free;
706 nfs_confirm_seqid(&data->owner->so_seqid, 0);
707 state = nfs4_opendata_to_nfs4_state(data);
708 if (state != NULL)
709 nfs4_close_state(state, data->o_arg.open_flags);
710out_free:
711 nfs4_opendata_free(data);
712}
713
714static const struct rpc_call_ops nfs4_open_ops = {
715 .rpc_call_prepare = nfs4_open_prepare,
716 .rpc_call_done = nfs4_open_done,
717 .rpc_release = nfs4_open_release,
718};
719
720/*
721 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
722 */
723static int _nfs4_proc_open(struct nfs4_opendata *data)
724{
725 struct inode *dir = data->dir->d_inode;
726 struct nfs_server *server = NFS_SERVER(dir);
727 struct nfs_openargs *o_arg = &data->o_arg;
728 struct nfs_openres *o_res = &data->o_res;
729 struct rpc_task *task;
730 int status;
731
732 atomic_inc(&data->count);
7a1218a2
TM		 733 /*
734 * If rpc_run_task() ends up calling ->rpc_release(), we
735 * want to ensure that it takes the 'error' code path.
736 */
737 data->rpc_status = -ENOMEM;
24ac23ab 738 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
7a1218a2 739 if (IS_ERR(task))
24ac23ab 740 return PTR_ERR(task);
24ac23ab
TM		 741 status = nfs4_wait_for_completion_rpc_task(task);
742 if (status != 0) {
743 data->cancelled = 1;
744 smp_wmb();
745 } else
746 status = data->rpc_status;
747 rpc_release_task(task);
1da177e4 748 if (status != 0)
24ac23ab
TM		 749 return status;
750
56ae19f3
TM		 751 if (o_arg->open_flags & O_CREAT) {
752 update_changeattr(dir, &o_res->cinfo);
753 nfs_post_op_update_inode(dir, o_res->dir_attr);
754 } else
755 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 756 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 757 status = _nfs4_proc_open_confirm(data);
1da177e4 758 if (status != 0)
24ac23ab 759 return status;
1da177e4 760 }
24ac23ab 761 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1da177e4 762 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
24ac23ab
TM		 763 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
764 return 0;
1da177e4
LT		 765}
766
767static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
768{
769 struct nfs_access_entry cache;
770 int mask = 0;
771 int status;
772
773 if (openflags & FMODE_READ)
774 mask |= MAY_READ;
775 if (openflags & FMODE_WRITE)
776 mask |= MAY_WRITE;
777 status = nfs_access_get_cached(inode, cred, &cache);
778 if (status == 0)
779 goto out;
780
781 /* Be clever: ask server to check for all possible rights */
782 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
783 cache.cred = cred;
784 cache.jiffies = jiffies;
785 status = _nfs4_proc_access(inode, &cache);
786 if (status != 0)
787 return status;
788 nfs_access_add_cache(inode, &cache);
789out:
790 if ((cache.mask & mask) == mask)
791 return 0;
792 return -EACCES;
793}
794
58d9714a
TM		 795int nfs4_recover_expired_lease(struct nfs_server *server)
796{
797 struct nfs4_client *clp = server->nfs4_state;
798
799 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
800 nfs4_schedule_state_recovery(clp);
801 return nfs4_wait_clnt_recover(server->client, clp);
802}
803
1da177e4
LT		 804/*
805 * OPEN_EXPIRED:
806 * reclaim state on the server after a network partition.
807 * Assumes caller holds the appropriate lock
808 */
809static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
810{
1da177e4 811 struct inode *inode = state->inode;
1da177e4 812 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
e56e0b78 813 struct nfs4_opendata *opendata;
24ac23ab 814 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
864472e9 815 int ret;
1da177e4
LT		 816
817 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
864472e9
TM		 818 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
819 if (ret < 0)
820 return ret;
1da177e4
LT		 821 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
822 set_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9 823 return 0;
1da177e4 824 }
24ac23ab 825 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
e56e0b78 826 if (opendata == NULL)
864472e9
TM		 827 return -ENOMEM;
828 ret = nfs4_open_recover(opendata, state);
829 if (ret == -ESTALE) {
830 /* Invalidate the state owner so we don't ever use it again */
831 nfs4_drop_state_owner(sp);
832 d_drop(dentry);
1da177e4 833 }
e56e0b78 834 nfs4_opendata_free(opendata);
864472e9 835 return ret;
1da177e4
LT		 836}
837
202b50dc
TM		 838static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
839{
840 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
841 struct nfs4_exception exception = { };
842 int err;
843
844 do {
845 err = _nfs4_open_expired(sp, state, dentry);
846 if (err == -NFS4ERR_DELAY)
847 nfs4_handle_exception(server, err, &exception);
848 } while (exception.retry);
849 return err;
850}
851
1da177e4
LT		 852static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
853{
1da177e4 854 struct nfs_open_context *ctx;
864472e9 855 int ret;
1da177e4 856
864472e9
TM		 857 ctx = nfs4_state_find_open_context(state);
858 if (IS_ERR(ctx))
859 return PTR_ERR(ctx);
860 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
861 put_nfs_open_context(ctx);
862 return ret;
1da177e4
LT		 863}
864
865/*
24ac23ab 866 * Returns a referenced nfs4_state if there is an open delegation on the file
1da177e4
LT		 867 */
868static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
869{
870 struct nfs_delegation *delegation;
871 struct nfs_server *server = NFS_SERVER(inode);
872 struct nfs4_client *clp = server->nfs4_state;
873 struct nfs_inode *nfsi = NFS_I(inode);
874 struct nfs4_state_owner *sp = NULL;
875 struct nfs4_state *state = NULL;
876 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
877 int err;
878
b4454fe1
TM		 879 err = -ENOMEM;
880 if (!(sp = nfs4_get_state_owner(server, cred))) {
881 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
882 return err;
883 }
58d9714a
TM		 884 err = nfs4_recover_expired_lease(server);
885 if (err != 0)
b4454fe1 886 goto out_put_state_owner;
1da177e4
LT		 887 /* Protect against reboot recovery - NOTE ORDER! */
888 down_read(&clp->cl_sem);
889 /* Protect against delegation recall */
890 down_read(&nfsi->rwsem);
891 delegation = NFS_I(inode)->delegation;
892 err = -ENOENT;
893 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
894 goto out_err;
895 err = -ENOMEM;
1da177e4
LT		 896 state = nfs4_get_open_state(inode, sp);
897 if (state == NULL)
898 goto out_err;
899
900 err = -ENOENT;
901 if ((state->state & open_flags) == open_flags) {
902 spin_lock(&inode->i_lock);
e7616923 903 update_open_stateflags(state, open_flags);
1da177e4
LT		 904 spin_unlock(&inode->i_lock);
905 goto out_ok;
906 } else if (state->state != 0)
b4454fe1 907 goto out_put_open_state;
1da177e4
LT		 908
909 lock_kernel();
910 err = _nfs4_do_access(inode, cred, open_flags);
911 unlock_kernel();
912 if (err != 0)
b4454fe1 913 goto out_put_open_state;
1da177e4
LT		 914 set_bit(NFS_DELEGATED_STATE, &state->flags);
915 update_open_stateid(state, &delegation->stateid, open_flags);
916out_ok:
1da177e4
LT		 917 nfs4_put_state_owner(sp);
918 up_read(&nfsi->rwsem);
919 up_read(&clp->cl_sem);
1da177e4 920 *res = state;
b4454fe1
TM		 921 return 0;
922out_put_open_state:
923 nfs4_put_open_state(state);
1da177e4 924out_err:
1da177e4
LT		 925 up_read(&nfsi->rwsem);
926 up_read(&clp->cl_sem);
b8e5c4c2
TM		 927 if (err != -EACCES)
928 nfs_inode_return_delegation(inode);
b4454fe1
TM		 929out_put_state_owner:
930 nfs4_put_state_owner(sp);
1da177e4
LT		 931 return err;
932}
933
934static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
935{
936 struct nfs4_exception exception = { };
a162a6b8 937 struct nfs4_state *res = ERR_PTR(-EIO);
1da177e4
LT		 938 int err;
939
940 do {
941 err = _nfs4_open_delegated(inode, flags, cred, &res);
942 if (err == 0)
943 break;
944 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
945 err, &exception));
946 } while (exception.retry);
947 return res;
948}
949
950/*
24ac23ab 951 * Returns a referenced nfs4_state
1da177e4
LT		 952 */
953static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
954{
955 struct nfs4_state_owner *sp;
956 struct nfs4_state *state = NULL;
957 struct nfs_server *server = NFS_SERVER(dir);
958 struct nfs4_client *clp = server->nfs4_state;
e56e0b78 959 struct nfs4_opendata *opendata;
1da177e4 960 int status;
1da177e4
LT		 961
962 /* Protect against reboot recovery conflicts */
1da177e4
LT		 963 status = -ENOMEM;
964 if (!(sp = nfs4_get_state_owner(server, cred))) {
965 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
966 goto out_err;
967 }
58d9714a
TM		 968 status = nfs4_recover_expired_lease(server);
969 if (status != 0)
b4454fe1 970 goto err_put_state_owner;
58d9714a
TM		 971 down_read(&clp->cl_sem);
972 status = -ENOMEM;
e56e0b78
TM		 973 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
974 if (opendata == NULL)
975 goto err_put_state_owner;
1da177e4 976
24ac23ab 977 status = _nfs4_proc_open(opendata);
1da177e4 978 if (status != 0)
e56e0b78 979 goto err_opendata_free;
1da177e4
LT		 980
981 status = -ENOMEM;
24ac23ab
TM		 982 state = nfs4_opendata_to_nfs4_state(opendata);
983 if (state == NULL)
e56e0b78 984 goto err_opendata_free;
e56e0b78 985 if (opendata->o_res.delegation_type != 0)
24ac23ab 986 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
e56e0b78 987 nfs4_opendata_free(opendata);
1da177e4
LT		 988 nfs4_put_state_owner(sp);
989 up_read(&clp->cl_sem);
990 *res = state;
991 return 0;
e56e0b78
TM		 992err_opendata_free:
993 nfs4_opendata_free(opendata);
994err_put_state_owner:
995 nfs4_put_state_owner(sp);
1da177e4 996out_err:
1da177e4
LT		 997 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
998 up_read(&clp->cl_sem);
1da177e4
LT		 999 *res = NULL;
1000 return status;
1001}
1002
1003
1004static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
1005{
1006 struct nfs4_exception exception = { };
1007 struct nfs4_state *res;
1008 int status;
1009
1010 do {
1011 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
1012 if (status == 0)
1013 break;
1014 /* NOTE: BAD_SEQID means the server and client disagree about the
1015 * book-keeping w.r.t. state-changing operations
1016 * (OPEN/CLOSE/LOCK/LOCKU...)
1017 * It is actually a sign of a bug on the client or on the server.
1018 *
1019 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1020 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1021 * have unhashed the old state_owner for us, and that we can
1022 * therefore safely retry using a new one. We should still warn
1023 * the user though...
1024 */
1025 if (status == -NFS4ERR_BAD_SEQID) {
1026 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1027 exception.retry = 1;
1028 continue;
1029 }
550f5747
TM		 1030 /*
1031 * BAD_STATEID on OPEN means that the server cancelled our
1032 * state before it received the OPEN_CONFIRM.
1033 * Recover by retrying the request as per the discussion
1034 * on Page 181 of RFC3530.
1035 */
1036 if (status == -NFS4ERR_BAD_STATEID) {
1037 exception.retry = 1;
1038 continue;
1039 }
1da177e4
LT		 1040 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1041 status, &exception));
1042 } while (exception.retry);
1043 return res;
1044}
1045
3e4f6290
TM		 1046static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1047 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1048{
3e4f6290 1049 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1050 struct nfs_setattrargs arg = {
3e4f6290 1051 .fh = NFS_FH(inode),
1da177e4
LT		 1052 .iap = sattr,
1053 .server = server,
1054 .bitmask = server->attr_bitmask,
1055 };
1056 struct nfs_setattrres res = {
1057 .fattr = fattr,
1058 .server = server,
1059 };
1060 struct rpc_message msg = {
1061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1062 .rpc_argp = &arg,
1063 .rpc_resp = &res,
1064 };
26e976a8 1065 unsigned long timestamp = jiffies;
65e4308d 1066 int status;
1da177e4 1067
0e574af1 1068 nfs_fattr_init(fattr);
1da177e4 1069
3e4f6290
TM		 1070 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1071 /* Use that stateid */
1072 } else if (state != NULL) {
1da177e4 1073 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1074 nfs4_copy_stateid(&arg.stateid, state, current->files);
1075 } else
1da177e4
LT		 1076 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1077
65e4308d 1078 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1079 if (status == 0 && state != NULL)
1080 renew_lease(server, timestamp);
65e4308d 1081 return status;
1da177e4
LT		 1082}
1083
3e4f6290
TM		 1084static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1085 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1086{
3e4f6290 1087 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1088 struct nfs4_exception exception = { };
1089 int err;
1090 do {
1091 err = nfs4_handle_exception(server,
3e4f6290 1092 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1093 &exception);
1094 } while (exception.retry);
1095 return err;
1096}
1097
1098struct nfs4_closedata {
1099 struct inode *inode;
1100 struct nfs4_state *state;
1101 struct nfs_closeargs arg;
1102 struct nfs_closeres res;
516a6af6 1103 struct nfs_fattr fattr;
26e976a8 1104 unsigned long timestamp;
1da177e4
LT		 1105};
1106
963d8fe5 1107static void nfs4_free_closedata(void *data)
9512135d 1108{
963d8fe5
TM		 1109 struct nfs4_closedata *calldata = data;
1110 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1111
1112 nfs4_put_open_state(calldata->state);
1113 nfs_free_seqid(calldata->arg.seqid);
9512135d 1114 nfs4_put_state_owner(sp);
9512135d
TM		 1115 kfree(calldata);
1116}
1117
963d8fe5 1118static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1119{
963d8fe5 1120 struct nfs4_closedata *calldata = data;
1da177e4 1121 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1122 struct nfs_server *server = NFS_SERVER(calldata->inode);
1123
4ce70ada
TM		 1124 if (RPC_ASSASSINATED(task))
1125 return;
1da177e4
LT		 1126 /* hmm. we are done with the inode, and in the process of freeing
1127 * the state_owner. we keep this around to process errors
1128 */
cee54fc9 1129 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1130 switch (task->tk_status) {
1131 case 0:
1132 memcpy(&state->stateid, &calldata->res.stateid,
1133 sizeof(state->stateid));
26e976a8 1134 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1135 break;
1136 case -NFS4ERR_STALE_STATEID:
1137 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1138 nfs4_schedule_state_recovery(server->nfs4_state);
1139 break;
1140 default:
1141 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1142 rpc_restart_call(task);
1143 return;
1144 }
1145 }
516a6af6 1146 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1147}
1148
4ce70ada 1149static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1150{
4ce70ada 1151 struct nfs4_closedata *calldata = data;
9512135d 1152 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1153 struct rpc_message msg = {
1154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1155 .rpc_argp = &calldata->arg,
1156 .rpc_resp = &calldata->res,
9512135d 1157 .rpc_cred = state->owner->so_cred,
1da177e4 1158 };
4cecb76f 1159 int mode = 0, old_mode;
9512135d 1160
963d8fe5 1161 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1162 return;
9512135d
TM		 1163 /* Recalculate the new open mode in case someone reopened the file
1164 * while we were waiting in line to be scheduled.
1165 */
4cecb76f
TM		 1166 spin_lock(&state->owner->so_lock);
1167 spin_lock(&calldata->inode->i_lock);
1168 mode = old_mode = state->state;
e7616923
TM		 1169 if (state->n_rdwr == 0) {
1170 if (state->n_rdonly == 0)
1171 mode &= ~FMODE_READ;
1172 if (state->n_wronly == 0)
1173 mode &= ~FMODE_WRITE;
1174 }
4cecb76f
TM		 1175 nfs4_state_set_mode_locked(state, mode);
1176 spin_unlock(&calldata->inode->i_lock);
1177 spin_unlock(&state->owner->so_lock);
1178 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
963d8fe5
TM		 1179 /* Note: exit _without_ calling nfs4_close_done */
1180 task->tk_action = NULL;
9512135d
TM		 1181 return;
1182 }
516a6af6 1183 nfs_fattr_init(calldata->res.fattr);
9512135d 1184 if (mode != 0)
1da177e4 1185 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d 1186 calldata->arg.open_flags = mode;
26e976a8 1187 calldata->timestamp = jiffies;
9512135d 1188 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1189}
1190
963d8fe5 1191static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1192 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1193 .rpc_call_done = nfs4_close_done,
1194 .rpc_release = nfs4_free_closedata,
1195};
1196
1da177e4
LT		 1197/*
1198 * It is possible for data to be read/written from a mem-mapped file
1199 * after the sys_close call (which hits the vfs layer as a flush).
1200 * This means that we can't safely call nfsv4 close on a file until
1201 * the inode is cleared. This in turn means that we are not good
1202 * NFSv4 citizens - we do not indicate to the server to update the file's
1203 * share state even when we are done with one of the three share
1204 * stateid's in the inode.
1205 *
1206 * NOTE: Caller must be holding the sp->so_owner semaphore!
1207 */
4cecb76f 1208int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1da177e4 1209{
516a6af6 1210 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1211 struct nfs4_closedata *calldata;
9512135d 1212 int status = -ENOMEM;
1da177e4 1213
9512135d 1214 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1215 if (calldata == NULL)
9512135d 1216 goto out;
1da177e4
LT		 1217 calldata->inode = inode;
1218 calldata->state = state;
1219 calldata->arg.fh = NFS_FH(inode);
9512135d 1220 calldata->arg.stateid = &state->stateid;
1da177e4 1221 /* Serialization for the sequence id */
cee54fc9 1222 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1223 if (calldata->arg.seqid == NULL)
1224 goto out_free_calldata;
516a6af6
TM		 1225 calldata->arg.bitmask = server->attr_bitmask;
1226 calldata->res.fattr = &calldata->fattr;
1227 calldata->res.server = server;
9512135d 1228
4ce70ada 1229 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
9512135d
TM		 1230 if (status == 0)
1231 goto out;
1232
1233 nfs_free_seqid(calldata->arg.seqid);
1234out_free_calldata:
1235 kfree(calldata);
1236out:
1237 return status;
1da177e4
LT		 1238}
1239
95cf959b 1240static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
02a913a7
TM		 1241{
1242 struct file *filp;
1243
1244 filp = lookup_instantiate_filp(nd, dentry, NULL);
1245 if (!IS_ERR(filp)) {
1246 struct nfs_open_context *ctx;
1247 ctx = (struct nfs_open_context *)filp->private_data;
1248 ctx->state = state;
95cf959b
TM		 1249 return 0;
1250 }
1251 nfs4_close_state(state, nd->intent.open.flags);
1252 return PTR_ERR(filp);
02a913a7
TM		 1253}
1254
1255struct dentry *
1da177e4
LT		 1256nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1257{
1258 struct iattr attr;
1259 struct rpc_cred *cred;
1260 struct nfs4_state *state;
02a913a7 1261 struct dentry *res;
1da177e4
LT		 1262
1263 if (nd->flags & LOOKUP_CREATE) {
1264 attr.ia_mode = nd->intent.open.create_mode;
1265 attr.ia_valid = ATTR_MODE;
1266 if (!IS_POSIXACL(dir))
1267 attr.ia_mode &= ~current->fs->umask;
1268 } else {
1269 attr.ia_valid = 0;
1270 BUG_ON(nd->intent.open.flags & O_CREAT);
1271 }
1272
1273 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1274 if (IS_ERR(cred))
02a913a7 1275 return (struct dentry *)cred;
1da177e4
LT		 1276 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1277 put_rpccred(cred);
02a913a7
TM		 1278 if (IS_ERR(state)) {
1279 if (PTR_ERR(state) == -ENOENT)
1280 d_add(dentry, NULL);
1281 return (struct dentry *)state;
1282 }
24ac23ab 1283 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM		 1284 if (res != NULL)
1285 dentry = res;
1286 nfs4_intent_set_file(nd, dentry, state);
1287 return res;
1da177e4
LT		 1288}
1289
1290int
02a913a7 1291nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4
LT		 1292{
1293 struct rpc_cred *cred;
1294 struct nfs4_state *state;
1da177e4
LT		 1295
1296 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1297 if (IS_ERR(cred))
1298 return PTR_ERR(cred);
1299 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1300 if (IS_ERR(state))
1301 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1302 put_rpccred(cred);
02a913a7
TM		 1303 if (IS_ERR(state)) {
1304 switch (PTR_ERR(state)) {
1305 case -EPERM:
1306 case -EACCES:
1307 case -EDQUOT:
1308 case -ENOSPC:
1309 case -EROFS:
1310 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1311 return 1;
1312 case -ENOENT:
1313 if (dentry->d_inode == NULL)
1314 return 1;
1315 }
1316 goto out_drop;
1317 }
24ac23ab 1318 if (state->inode == dentry->d_inode) {
02a913a7 1319 nfs4_intent_set_file(nd, dentry, state);
1da177e4
LT		 1320 return 1;
1321 }
1da177e4 1322 nfs4_close_state(state, openflags);
02a913a7
TM		 1323out_drop:
1324 d_drop(dentry);
1da177e4
LT		 1325 return 0;
1326}
1327
1328
1329static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1330{
1331 struct nfs4_server_caps_res res = {};
1332 struct rpc_message msg = {
1333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1334 .rpc_argp = fhandle,
1335 .rpc_resp = &res,
1336 };
1337 int status;
1338
1339 status = rpc_call_sync(server->client, &msg, 0);
1340 if (status == 0) {
1341 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1342 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1343 server->caps |= NFS_CAP_ACLS;
1344 if (res.has_links != 0)
1345 server->caps |= NFS_CAP_HARDLINKS;
1346 if (res.has_symlinks != 0)
1347 server->caps |= NFS_CAP_SYMLINKS;
1348 server->acl_bitmask = res.acl_bitmask;
1349 }
1350 return status;
1351}
1352
55a97593 1353int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1354{
1355 struct nfs4_exception exception = { };
1356 int err;
1357 do {
1358 err = nfs4_handle_exception(server,
1359 _nfs4_server_capabilities(server, fhandle),
1360 &exception);
1361 } while (exception.retry);
1362 return err;
1363}
1364
1365static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1366 struct nfs_fsinfo *info)
1367{
1da177e4
LT		 1368 struct nfs4_lookup_root_arg args = {
1369 .bitmask = nfs4_fattr_bitmap,
1370 };
1371 struct nfs4_lookup_res res = {
1372 .server = server,
0e574af1 1373 .fattr = info->fattr,
1da177e4
LT		 1374 .fh = fhandle,
1375 };
1376 struct rpc_message msg = {
1377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1378 .rpc_argp = &args,
1379 .rpc_resp = &res,
1380 };
0e574af1 1381 nfs_fattr_init(info->fattr);
1da177e4
LT		 1382 return rpc_call_sync(server->client, &msg, 0);
1383}
1384
1385static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1386 struct nfs_fsinfo *info)
1387{
1388 struct nfs4_exception exception = { };
1389 int err;
1390 do {
1391 err = nfs4_handle_exception(server,
1392 _nfs4_lookup_root(server, fhandle, info),
1393 &exception);
1394 } while (exception.retry);
1395 return err;
1396}
1397
1398static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1399 struct nfs_fsinfo *info)
1400{
1401 struct nfs_fattr * fattr = info->fattr;
1402 unsigned char * p;
1403 struct qstr q;
1404 struct nfs4_lookup_arg args = {
1405 .dir_fh = fhandle,
1406 .name = &q,
1407 .bitmask = nfs4_fattr_bitmap,
1408 };
1409 struct nfs4_lookup_res res = {
1410 .server = server,
1411 .fattr = fattr,
1412 .fh = fhandle,
1413 };
1414 struct rpc_message msg = {
1415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1416 .rpc_argp = &args,
1417 .rpc_resp = &res,
1418 };
1419 int status;
1420
1421 /*
1422 * Now we do a separate LOOKUP for each component of the mount path.
1423 * The LOOKUPs are done separately so that we can conveniently
1424 * catch an ERR_WRONGSEC if it occurs along the way...
1425 */
1426 status = nfs4_lookup_root(server, fhandle, info);
1427 if (status)
1428 goto out;
1429
1430 p = server->mnt_path;
1431 for (;;) {
1432 struct nfs4_exception exception = { };
1433
1434 while (*p == '/')
1435 p++;
1436 if (!*p)
1437 break;
1438 q.name = p;
1439 while (*p && (*p != '/'))
1440 p++;
1441 q.len = p - q.name;
1442
1443 do {
0e574af1 1444 nfs_fattr_init(fattr);
1da177e4
LT		 1445 status = nfs4_handle_exception(server,
1446 rpc_call_sync(server->client, &msg, 0),
1447 &exception);
1448 } while (exception.retry);
1449 if (status == 0)
1450 continue;
1451 if (status == -ENOENT) {
1452 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1453 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1454 }
1455 break;
1456 }
1457 if (status == 0)
1458 status = nfs4_server_capabilities(server, fhandle);
1459 if (status == 0)
1460 status = nfs4_do_fsinfo(server, fhandle, info);
1461out:
c12e87f4 1462 return nfs4_map_errors(status);
1da177e4
LT		 1463}
1464
1465static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1466{
1467 struct nfs4_getattr_arg args = {
1468 .fh = fhandle,
1469 .bitmask = server->attr_bitmask,
1470 };
1471 struct nfs4_getattr_res res = {
1472 .fattr = fattr,
1473 .server = server,
1474 };
1475 struct rpc_message msg = {
1476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1477 .rpc_argp = &args,
1478 .rpc_resp = &res,
1479 };
1480
0e574af1 1481 nfs_fattr_init(fattr);
1da177e4
LT		 1482 return rpc_call_sync(server->client, &msg, 0);
1483}
1484
1485static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1486{
1487 struct nfs4_exception exception = { };
1488 int err;
1489 do {
1490 err = nfs4_handle_exception(server,
1491 _nfs4_proc_getattr(server, fhandle, fattr),
1492 &exception);
1493 } while (exception.retry);
1494 return err;
1495}
1496
1497/*
1498 * The file is not closed if it is opened due to the a request to change
1499 * the size of the file. The open call will not be needed once the
1500 * VFS layer lookup-intents are implemented.
1501 *
1502 * Close is called when the inode is destroyed.
1503 * If we haven't opened the file for O_WRONLY, we
1504 * need to in the size_change case to obtain a stateid.
1505 *
1506 * Got race?
1507 * Because OPEN is always done by name in nfsv4, it is
1508 * possible that we opened a different file by the same
1509 * name. We can recognize this race condition, but we
1510 * can't do anything about it besides returning an error.
1511 *
1512 * This will be fixed with VFS changes (lookup-intent).
1513 */
1514static int
1515nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1516 struct iattr *sattr)
1517{
08e9eac4
TM		 1518 struct rpc_cred *cred;
1519 struct inode *inode = dentry->d_inode;
d530838b
TM		 1520 struct nfs_open_context *ctx;
1521 struct nfs4_state *state = NULL;
1da177e4
LT		 1522 int status;
1523
0e574af1 1524 nfs_fattr_init(fattr);
1da177e4 1525
08e9eac4
TM		 1526 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1527 if (IS_ERR(cred))
1528 return PTR_ERR(cred);
d530838b
TM		 1529
1530 /* Search for an existing open(O_WRITE) file */
1531 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1532 if (ctx != NULL)
1533 state = ctx->state;
08e9eac4 1534
3e4f6290 1535 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1536 if (status == 0)
1537 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1538 if (ctx != NULL)
1539 put_nfs_open_context(ctx);
08e9eac4 1540 put_rpccred(cred);
1da177e4
LT		 1541 return status;
1542}
1543
1544static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1545 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1546{
1547 int status;
1548 struct nfs_server *server = NFS_SERVER(dir);
1549 struct nfs4_lookup_arg args = {
1550 .bitmask = server->attr_bitmask,
1551 .dir_fh = NFS_FH(dir),
1552 .name = name,
1553 };
1554 struct nfs4_lookup_res res = {
1555 .server = server,
1556 .fattr = fattr,
1557 .fh = fhandle,
1558 };
1559 struct rpc_message msg = {
1560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1561 .rpc_argp = &args,
1562 .rpc_resp = &res,
1563 };
1564
0e574af1 1565 nfs_fattr_init(fattr);
1da177e4
LT		 1566
1567 dprintk("NFS call lookup %s\n", name->name);
1568 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1569 dprintk("NFS reply lookup: %d\n", status);
1570 return status;
1571}
1572
1573static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1574{
1575 struct nfs4_exception exception = { };
1576 int err;
1577 do {
1578 err = nfs4_handle_exception(NFS_SERVER(dir),
1579 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1580 &exception);
1581 } while (exception.retry);
1582 return err;
1583}
1584
1585static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1586{
1587 struct nfs4_accessargs args = {
1588 .fh = NFS_FH(inode),
1589 };
1590 struct nfs4_accessres res = { 0 };
1591 struct rpc_message msg = {
1592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1593 .rpc_argp = &args,
1594 .rpc_resp = &res,
1595 .rpc_cred = entry->cred,
1596 };
1597 int mode = entry->mask;
1598 int status;
1599
1600 /*
1601 * Determine which access bits we want to ask for...
1602 */
1603 if (mode & MAY_READ)
1604 args.access |= NFS4_ACCESS_READ;
1605 if (S_ISDIR(inode->i_mode)) {
1606 if (mode & MAY_WRITE)
1607 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1608 if (mode & MAY_EXEC)
1609 args.access |= NFS4_ACCESS_LOOKUP;
1610 } else {
1611 if (mode & MAY_WRITE)
1612 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1613 if (mode & MAY_EXEC)
1614 args.access |= NFS4_ACCESS_EXECUTE;
1615 }
1616 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1617 if (!status) {
1618 entry->mask = 0;
1619 if (res.access & NFS4_ACCESS_READ)
1620 entry->mask |= MAY_READ;
1621 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1622 entry->mask |= MAY_WRITE;
1623 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1624 entry->mask |= MAY_EXEC;
1625 }
1626 return status;
1627}
1628
1629static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1630{
1631 struct nfs4_exception exception = { };
1632 int err;
1633 do {
1634 err = nfs4_handle_exception(NFS_SERVER(inode),
1635 _nfs4_proc_access(inode, entry),
1636 &exception);
1637 } while (exception.retry);
1638 return err;
1639}
1640
1641/*
1642 * TODO: For the time being, we don't try to get any attributes
1643 * along with any of the zero-copy operations READ, READDIR,
1644 * READLINK, WRITE.
1645 *
1646 * In the case of the first three, we want to put the GETATTR
1647 * after the read-type operation -- this is because it is hard
1648 * to predict the length of a GETATTR response in v4, and thus
1649 * align the READ data correctly. This means that the GETATTR
1650 * may end up partially falling into the page cache, and we should
1651 * shift it into the 'tail' of the xdr_buf before processing.
1652 * To do this efficiently, we need to know the total length
1653 * of data received, which doesn't seem to be available outside
1654 * of the RPC layer.
1655 *
1656 * In the case of WRITE, we also want to put the GETATTR after
1657 * the operation -- in this case because we want to make sure
1658 * we get the post-operation mtime and size. This means that
1659 * we can't use xdr_encode_pages() as written: we need a variant
1660 * of it which would leave room in the 'tail' iovec.
1661 *
1662 * Both of these changes to the XDR layer would in fact be quite
1663 * minor, but I decided to leave them for a subsequent patch.
1664 */
1665static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1666 unsigned int pgbase, unsigned int pglen)
1667{
1668 struct nfs4_readlink args = {
1669 .fh = NFS_FH(inode),
1670 .pgbase = pgbase,
1671 .pglen = pglen,
1672 .pages = &page,
1673 };
1674 struct rpc_message msg = {
1675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1676 .rpc_argp = &args,
1677 .rpc_resp = NULL,
1678 };
1679
1680 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1681}
1682
1683static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1684 unsigned int pgbase, unsigned int pglen)
1685{
1686 struct nfs4_exception exception = { };
1687 int err;
1688 do {
1689 err = nfs4_handle_exception(NFS_SERVER(inode),
1690 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1691 &exception);
1692 } while (exception.retry);
1693 return err;
1694}
1695
1696static int _nfs4_proc_read(struct nfs_read_data *rdata)
1697{
1698 int flags = rdata->flags;
1699 struct inode *inode = rdata->inode;
1700 struct nfs_fattr *fattr = rdata->res.fattr;
1701 struct nfs_server *server = NFS_SERVER(inode);
1702 struct rpc_message msg = {
1703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1704 .rpc_argp = &rdata->args,
1705 .rpc_resp = &rdata->res,
1706 .rpc_cred = rdata->cred,
1707 };
1708 unsigned long timestamp = jiffies;
1709 int status;
1710
1711 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1712 (long long) rdata->args.offset);
1713
0e574af1 1714 nfs_fattr_init(fattr);
1da177e4
LT		 1715 status = rpc_call_sync(server->client, &msg, flags);
1716 if (!status)
1717 renew_lease(server, timestamp);
1718 dprintk("NFS reply read: %d\n", status);
1719 return status;
1720}
1721
1722static int nfs4_proc_read(struct nfs_read_data *rdata)
1723{
1724 struct nfs4_exception exception = { };
1725 int err;
1726 do {
1727 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1728 _nfs4_proc_read(rdata),
1729 &exception);
1730 } while (exception.retry);
1731 return err;
1732}
1733
1734static int _nfs4_proc_write(struct nfs_write_data *wdata)
1735{
1736 int rpcflags = wdata->flags;
1737 struct inode *inode = wdata->inode;
1738 struct nfs_fattr *fattr = wdata->res.fattr;
1739 struct nfs_server *server = NFS_SERVER(inode);
1740 struct rpc_message msg = {
1741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1742 .rpc_argp = &wdata->args,
1743 .rpc_resp = &wdata->res,
1744 .rpc_cred = wdata->cred,
1745 };
1746 int status;
1747
1748 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1749 (long long) wdata->args.offset);
1750
3b6efee9
TM		 1751 wdata->args.bitmask = server->attr_bitmask;
1752 wdata->res.server = server;
26e976a8 1753 wdata->timestamp = jiffies;
0e574af1 1754 nfs_fattr_init(fattr);
1da177e4
LT		 1755 status = rpc_call_sync(server->client, &msg, rpcflags);
1756 dprintk("NFS reply write: %d\n", status);
3b6efee9
TM		 1757 if (status < 0)
1758 return status;
26e976a8 1759 renew_lease(server, wdata->timestamp);
3b6efee9
TM		 1760 nfs_post_op_update_inode(inode, fattr);
1761 return wdata->res.count;
1da177e4
LT		 1762}
1763
1764static int nfs4_proc_write(struct nfs_write_data *wdata)
1765{
1766 struct nfs4_exception exception = { };
1767 int err;
1768 do {
1769 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1770 _nfs4_proc_write(wdata),
1771 &exception);
1772 } while (exception.retry);
1773 return err;
1774}
1775
1776static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1777{
1778 struct inode *inode = cdata->inode;
1779 struct nfs_fattr *fattr = cdata->res.fattr;
1780 struct nfs_server *server = NFS_SERVER(inode);
1781 struct rpc_message msg = {
1782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1783 .rpc_argp = &cdata->args,
1784 .rpc_resp = &cdata->res,
1785 .rpc_cred = cdata->cred,
1786 };
1787 int status;
1788
1789 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1790 (long long) cdata->args.offset);
1791
3b6efee9
TM		 1792 cdata->args.bitmask = server->attr_bitmask;
1793 cdata->res.server = server;
26e976a8 1794 cdata->timestamp = jiffies;
0e574af1 1795 nfs_fattr_init(fattr);
1da177e4 1796 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1797 if (status >= 0)
1798 renew_lease(server, cdata->timestamp);
1da177e4 1799 dprintk("NFS reply commit: %d\n", status);
3b6efee9
TM		 1800 if (status >= 0)
1801 nfs_post_op_update_inode(inode, fattr);
1da177e4
LT		 1802 return status;
1803}
1804
1805static int nfs4_proc_commit(struct nfs_write_data *cdata)
1806{
1807 struct nfs4_exception exception = { };
1808 int err;
1809 do {
1810 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1811 _nfs4_proc_commit(cdata),
1812 &exception);
1813 } while (exception.retry);
1814 return err;
1815}
1816
1817/*
1818 * Got race?
1819 * We will need to arrange for the VFS layer to provide an atomic open.
1820 * Until then, this create/open method is prone to inefficiency and race
1821 * conditions due to the lookup, create, and open VFS calls from sys_open()
1822 * placed on the wire.
1823 *
1824 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1825 * The file will be opened again in the subsequent VFS open call
1826 * (nfs4_proc_file_open).
1827 *
1828 * The open for read will just hang around to be used by any process that
1829 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1830 */
1831
1832static int
1833nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1834 int flags, struct nameidata *nd)
1da177e4
LT		 1835{
1836 struct nfs4_state *state;
1837 struct rpc_cred *cred;
1838 int status = 0;
1839
1840 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1841 if (IS_ERR(cred)) {
1842 status = PTR_ERR(cred);
1843 goto out;
1844 }
1845 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1846 put_rpccred(cred);
1847 if (IS_ERR(state)) {
1848 status = PTR_ERR(state);
1849 goto out;
1850 }
24ac23ab 1851 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1852 if (flags & O_EXCL) {
1853 struct nfs_fattr fattr;
3e4f6290 1854 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1855 if (status == 0)
65e4308d 1856 nfs_setattr_update_inode(state->inode, sattr);
02a913a7
TM		 1857 }
1858 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
95cf959b 1859 status = nfs4_intent_set_file(nd, dentry, state);
02a913a7
TM		 1860 else
1861 nfs4_close_state(state, flags);
1da177e4
LT		 1862out:
1863 return status;
1864}
1865
1866static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1867{
16e42959 1868 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 1869 struct nfs4_remove_arg args = {
1870 .fh = NFS_FH(dir),
1871 .name = name,
16e42959
TM		 1872 .bitmask = server->attr_bitmask,
1873 };
1874 struct nfs_fattr dir_attr;
1875 struct nfs4_remove_res res = {
1876 .server = server,
1877 .dir_attr = &dir_attr,
1da177e4 1878 };
1da177e4
LT		 1879 struct rpc_message msg = {
1880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1881 .rpc_argp = &args,
1882 .rpc_resp = &res,
1883 };
1884 int status;
1885
16e42959
TM		 1886 nfs_fattr_init(res.dir_attr);
1887 status = rpc_call_sync(server->client, &msg, 0);
1888 if (status == 0) {
1889 update_changeattr(dir, &res.cinfo);
1890 nfs_post_op_update_inode(dir, res.dir_attr);
1891 }
1da177e4
LT		 1892 return status;
1893}
1894
1895static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1896{
1897 struct nfs4_exception exception = { };
1898 int err;
1899 do {
1900 err = nfs4_handle_exception(NFS_SERVER(dir),
1901 _nfs4_proc_remove(dir, name),
1902 &exception);
1903 } while (exception.retry);
1904 return err;
1905}
1906
1907struct unlink_desc {
1908 struct nfs4_remove_arg args;
16e42959
TM		 1909 struct nfs4_remove_res res;
1910 struct nfs_fattr dir_attr;
1da177e4
LT		 1911};
1912
1913static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1914 struct qstr *name)
1915{
16e42959 1916 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1da177e4
LT		 1917 struct unlink_desc *up;
1918
1919 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1920 if (!up)
1921 return -ENOMEM;
1922
1923 up->args.fh = NFS_FH(dir->d_inode);
1924 up->args.name = name;
16e42959
TM		 1925 up->args.bitmask = server->attr_bitmask;
1926 up->res.server = server;
1927 up->res.dir_attr = &up->dir_attr;
1da177e4
LT		 1928
1929 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1930 msg->rpc_argp = &up->args;
1931 msg->rpc_resp = &up->res;
1932 return 0;
1933}
1934
1935static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1936{
1937 struct rpc_message *msg = &task->tk_msg;
1938 struct unlink_desc *up;
1939
1940 if (msg->rpc_resp != NULL) {
1941 up = container_of(msg->rpc_resp, struct unlink_desc, res);
16e42959
TM		 1942 update_changeattr(dir->d_inode, &up->res.cinfo);
1943 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1da177e4
LT		 1944 kfree(up);
1945 msg->rpc_resp = NULL;
1946 msg->rpc_argp = NULL;
1947 }
1948 return 0;
1949}
1950
1951static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1952 struct inode *new_dir, struct qstr *new_name)
1953{
6caf2c82 1954 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1955 struct nfs4_rename_arg arg = {
1956 .old_dir = NFS_FH(old_dir),
1957 .new_dir = NFS_FH(new_dir),
1958 .old_name = old_name,
1959 .new_name = new_name,
6caf2c82
TM		 1960 .bitmask = server->attr_bitmask,
1961 };
1962 struct nfs_fattr old_fattr, new_fattr;
1963 struct nfs4_rename_res res = {
1964 .server = server,
1965 .old_fattr = &old_fattr,
1966 .new_fattr = &new_fattr,
1da177e4 1967 };
1da177e4
LT		 1968 struct rpc_message msg = {
1969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1970 .rpc_argp = &arg,
1971 .rpc_resp = &res,
1972 };
1973 int status;
1974
6caf2c82
TM		 1975 nfs_fattr_init(res.old_fattr);
1976 nfs_fattr_init(res.new_fattr);
1977 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 1978
1979 if (!status) {
1980 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 1981 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 1982 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 1983 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 1984 }
1985 return status;
1986}
1987
1988static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1989 struct inode *new_dir, struct qstr *new_name)
1990{
1991 struct nfs4_exception exception = { };
1992 int err;
1993 do {
1994 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1995 _nfs4_proc_rename(old_dir, old_name,
1996 new_dir, new_name),
1997 &exception);
1998 } while (exception.retry);
1999 return err;
2000}
2001
2002static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2003{
91ba2eee 2004 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2005 struct nfs4_link_arg arg = {
2006 .fh = NFS_FH(inode),
2007 .dir_fh = NFS_FH(dir),
2008 .name = name,
91ba2eee
TM		 2009 .bitmask = server->attr_bitmask,
2010 };
2011 struct nfs_fattr fattr, dir_attr;
2012 struct nfs4_link_res res = {
2013 .server = server,
2014 .fattr = &fattr,
2015 .dir_attr = &dir_attr,
1da177e4 2016 };
1da177e4
LT		 2017 struct rpc_message msg = {
2018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2019 .rpc_argp = &arg,
91ba2eee 2020 .rpc_resp = &res,
1da177e4
LT		 2021 };
2022 int status;
2023
91ba2eee
TM		 2024 nfs_fattr_init(res.fattr);
2025 nfs_fattr_init(res.dir_attr);
2026 status = rpc_call_sync(server->client, &msg, 0);
2027 if (!status) {
2028 update_changeattr(dir, &res.cinfo);
2029 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2030 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2031 }
1da177e4
LT		 2032
2033 return status;
2034}
2035
2036static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2037{
2038 struct nfs4_exception exception = { };
2039 int err;
2040 do {
2041 err = nfs4_handle_exception(NFS_SERVER(inode),
2042 _nfs4_proc_link(inode, dir, name),
2043 &exception);
2044 } while (exception.retry);
2045 return err;
2046}
2047
2048static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2049 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2050 struct nfs_fattr *fattr)
2051{
2052 struct nfs_server *server = NFS_SERVER(dir);
56ae19f3 2053 struct nfs_fattr dir_fattr;
1da177e4
LT		 2054 struct nfs4_create_arg arg = {
2055 .dir_fh = NFS_FH(dir),
2056 .server = server,
2057 .name = name,
2058 .attrs = sattr,
2059 .ftype = NF4LNK,
2060 .bitmask = server->attr_bitmask,
2061 };
2062 struct nfs4_create_res res = {
2063 .server = server,
2064 .fh = fhandle,
2065 .fattr = fattr,
56ae19f3 2066 .dir_fattr = &dir_fattr,
1da177e4
LT		 2067 };
2068 struct rpc_message msg = {
2069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2070 .rpc_argp = &arg,
2071 .rpc_resp = &res,
2072 };
2073 int status;
2074
2075 if (path->len > NFS4_MAXPATHLEN)
2076 return -ENAMETOOLONG;
2077 arg.u.symlink = path;
0e574af1 2078 nfs_fattr_init(fattr);
56ae19f3 2079 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2080
2081 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2082 if (!status)
2083 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2084 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2085 return status;
2086}
2087
2088static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2089 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2090 struct nfs_fattr *fattr)
2091{
2092 struct nfs4_exception exception = { };
2093 int err;
2094 do {
2095 err = nfs4_handle_exception(NFS_SERVER(dir),
2096 _nfs4_proc_symlink(dir, name, path, sattr,
2097 fhandle, fattr),
2098 &exception);
2099 } while (exception.retry);
2100 return err;
2101}
2102
2103static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2104 struct iattr *sattr)
2105{
2106 struct nfs_server *server = NFS_SERVER(dir);
2107 struct nfs_fh fhandle;
56ae19f3 2108 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2109 struct nfs4_create_arg arg = {
2110 .dir_fh = NFS_FH(dir),
2111 .server = server,
2112 .name = &dentry->d_name,
2113 .attrs = sattr,
2114 .ftype = NF4DIR,
2115 .bitmask = server->attr_bitmask,
2116 };
2117 struct nfs4_create_res res = {
2118 .server = server,
2119 .fh = &fhandle,
2120 .fattr = &fattr,
56ae19f3 2121 .dir_fattr = &dir_fattr,
1da177e4
LT		 2122 };
2123 struct rpc_message msg = {
2124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2125 .rpc_argp = &arg,
2126 .rpc_resp = &res,
2127 };
2128 int status;
2129
0e574af1 2130 nfs_fattr_init(&fattr);
56ae19f3 2131 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2132
2133 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2134 if (!status) {
2135 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2136 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2137 status = nfs_instantiate(dentry, &fhandle, &fattr);
2138 }
2139 return status;
2140}
2141
2142static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2143 struct iattr *sattr)
2144{
2145 struct nfs4_exception exception = { };
2146 int err;
2147 do {
2148 err = nfs4_handle_exception(NFS_SERVER(dir),
2149 _nfs4_proc_mkdir(dir, dentry, sattr),
2150 &exception);
2151 } while (exception.retry);
2152 return err;
2153}
2154
2155static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2156 u64 cookie, struct page *page, unsigned int count, int plus)
2157{
2158 struct inode *dir = dentry->d_inode;
2159 struct nfs4_readdir_arg args = {
2160 .fh = NFS_FH(dir),
2161 .pages = &page,
2162 .pgbase = 0,
2163 .count = count,
2164 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2165 };
2166 struct nfs4_readdir_res res;
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2169 .rpc_argp = &args,
2170 .rpc_resp = &res,
2171 .rpc_cred = cred,
2172 };
2173 int status;
2174
eadf4598
TM		 2175 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2176 dentry->d_parent->d_name.name,
2177 dentry->d_name.name,
2178 (unsigned long long)cookie);
1da177e4
LT		 2179 lock_kernel();
2180 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2181 res.pgbase = args.pgbase;
2182 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2183 if (status == 0)
2184 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2185 unlock_kernel();
eadf4598 2186 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2187 return status;
2188}
2189
2190static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2191 u64 cookie, struct page *page, unsigned int count, int plus)
2192{
2193 struct nfs4_exception exception = { };
2194 int err;
2195 do {
2196 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2197 _nfs4_proc_readdir(dentry, cred, cookie,
2198 page, count, plus),
2199 &exception);
2200 } while (exception.retry);
2201 return err;
2202}
2203
2204static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2205 struct iattr *sattr, dev_t rdev)
2206{
2207 struct nfs_server *server = NFS_SERVER(dir);
2208 struct nfs_fh fh;
56ae19f3 2209 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2210 struct nfs4_create_arg arg = {
2211 .dir_fh = NFS_FH(dir),
2212 .server = server,
2213 .name = &dentry->d_name,
2214 .attrs = sattr,
2215 .bitmask = server->attr_bitmask,
2216 };
2217 struct nfs4_create_res res = {
2218 .server = server,
2219 .fh = &fh,
2220 .fattr = &fattr,
56ae19f3 2221 .dir_fattr = &dir_fattr,
1da177e4
LT		 2222 };
2223 struct rpc_message msg = {
2224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2225 .rpc_argp = &arg,
2226 .rpc_resp = &res,
2227 };
2228 int status;
2229 int mode = sattr->ia_mode;
2230
0e574af1 2231 nfs_fattr_init(&fattr);
56ae19f3 2232 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2233
2234 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2235 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2236 if (S_ISFIFO(mode))
2237 arg.ftype = NF4FIFO;
2238 else if (S_ISBLK(mode)) {
2239 arg.ftype = NF4BLK;
2240 arg.u.device.specdata1 = MAJOR(rdev);
2241 arg.u.device.specdata2 = MINOR(rdev);
2242 }
2243 else if (S_ISCHR(mode)) {
2244 arg.ftype = NF4CHR;
2245 arg.u.device.specdata1 = MAJOR(rdev);
2246 arg.u.device.specdata2 = MINOR(rdev);
2247 }
2248 else
2249 arg.ftype = NF4SOCK;
2250
2251 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2252 if (status == 0) {
2253 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2254 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2255 status = nfs_instantiate(dentry, &fh, &fattr);
2256 }
2257 return status;
2258}
2259
2260static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2261 struct iattr *sattr, dev_t rdev)
2262{
2263 struct nfs4_exception exception = { };
2264 int err;
2265 do {
2266 err = nfs4_handle_exception(NFS_SERVER(dir),
2267 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2268 &exception);
2269 } while (exception.retry);
2270 return err;
2271}
2272
2273static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2274 struct nfs_fsstat *fsstat)
2275{
2276 struct nfs4_statfs_arg args = {
2277 .fh = fhandle,
2278 .bitmask = server->attr_bitmask,
2279 };
2280 struct rpc_message msg = {
2281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2282 .rpc_argp = &args,
2283 .rpc_resp = fsstat,
2284 };
2285
0e574af1 2286 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2287 return rpc_call_sync(server->client, &msg, 0);
2288}
2289
2290static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2291{
2292 struct nfs4_exception exception = { };
2293 int err;
2294 do {
2295 err = nfs4_handle_exception(server,
2296 _nfs4_proc_statfs(server, fhandle, fsstat),
2297 &exception);
2298 } while (exception.retry);
2299 return err;
2300}
2301
2302static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2303 struct nfs_fsinfo *fsinfo)
2304{
2305 struct nfs4_fsinfo_arg args = {
2306 .fh = fhandle,
2307 .bitmask = server->attr_bitmask,
2308 };
2309 struct rpc_message msg = {
2310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2311 .rpc_argp = &args,
2312 .rpc_resp = fsinfo,
2313 };
2314
2315 return rpc_call_sync(server->client, &msg, 0);
2316}
2317
2318static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2319{
2320 struct nfs4_exception exception = { };
2321 int err;
2322
2323 do {
2324 err = nfs4_handle_exception(server,
2325 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2326 &exception);
2327 } while (exception.retry);
2328 return err;
2329}
2330
2331static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2332{
0e574af1 2333 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2334 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2335}
2336
2337static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2338 struct nfs_pathconf *pathconf)
2339{
2340 struct nfs4_pathconf_arg args = {
2341 .fh = fhandle,
2342 .bitmask = server->attr_bitmask,
2343 };
2344 struct rpc_message msg = {
2345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2346 .rpc_argp = &args,
2347 .rpc_resp = pathconf,
2348 };
2349
2350 /* None of the pathconf attributes are mandatory to implement */
2351 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2352 memset(pathconf, 0, sizeof(*pathconf));
2353 return 0;
2354 }
2355
0e574af1 2356 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2357 return rpc_call_sync(server->client, &msg, 0);
2358}
2359
2360static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2361 struct nfs_pathconf *pathconf)
2362{
2363 struct nfs4_exception exception = { };
2364 int err;
2365
2366 do {
2367 err = nfs4_handle_exception(server,
2368 _nfs4_proc_pathconf(server, fhandle, pathconf),
2369 &exception);
2370 } while (exception.retry);
2371 return err;
2372}
2373
ec06c096 2374static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2375{
ec06c096 2376 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2377
ec06c096 2378 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2379 rpc_restart_call(task);
ec06c096 2380 return -EAGAIN;
1da177e4
LT		 2381 }
2382 if (task->tk_status > 0)
ec06c096
TM		 2383 renew_lease(server, data->timestamp);
2384 return 0;
1da177e4
LT		 2385}
2386
ec06c096 2387static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2388{
1da177e4
LT		 2389 struct rpc_message msg = {
2390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2391 .rpc_argp = &data->args,
2392 .rpc_resp = &data->res,
2393 .rpc_cred = data->cred,
2394 };
1da177e4
LT		 2395
2396 data->timestamp = jiffies;
2397
ec06c096 2398 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2399}
2400
788e7a89 2401static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2402{
1da177e4
LT		 2403 struct inode *inode = data->inode;
2404
2405 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2406 rpc_restart_call(task);
788e7a89 2407 return -EAGAIN;
1da177e4 2408 }
4f9838c7 2409 if (task->tk_status >= 0) {
1da177e4 2410 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2411 nfs_post_op_update_inode(inode, data->res.fattr);
2412 }
788e7a89 2413 return 0;
1da177e4
LT		 2414}
2415
788e7a89 2416static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2417{
1da177e4
LT		 2418 struct rpc_message msg = {
2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2420 .rpc_argp = &data->args,
2421 .rpc_resp = &data->res,
2422 .rpc_cred = data->cred,
2423 };
2424 struct inode *inode = data->inode;
4f9838c7 2425 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2426 int stable;
1da177e4
LT		 2427
2428 if (how & FLUSH_STABLE) {
2429 if (!NFS_I(inode)->ncommit)
2430 stable = NFS_FILE_SYNC;
2431 else
2432 stable = NFS_DATA_SYNC;
2433 } else
2434 stable = NFS_UNSTABLE;
2435 data->args.stable = stable;
4f9838c7
TM		 2436 data->args.bitmask = server->attr_bitmask;
2437 data->res.server = server;
1da177e4
LT		 2438
2439 data->timestamp = jiffies;
2440
1da177e4 2441 /* Finalize the task. */
788e7a89 2442 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2443}
2444
788e7a89 2445static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2446{
1da177e4
LT		 2447 struct inode *inode = data->inode;
2448
2449 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2450 rpc_restart_call(task);
788e7a89 2451 return -EAGAIN;
1da177e4 2452 }
4f9838c7
TM		 2453 if (task->tk_status >= 0)
2454 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2455 return 0;
1da177e4
LT		 2456}
2457
788e7a89 2458static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2459{
1da177e4
LT		 2460 struct rpc_message msg = {
2461 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2462 .rpc_argp = &data->args,
2463 .rpc_resp = &data->res,
2464 .rpc_cred = data->cred,
2465 };
788e7a89 2466 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2467
4f9838c7
TM		 2468 data->args.bitmask = server->attr_bitmask;
2469 data->res.server = server;
2470
788e7a89 2471 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2472}
2473
2474/*
2475 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2476 * standalone procedure for queueing an asynchronous RENEW.
2477 */
963d8fe5 2478static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4
LT		 2479{
2480 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
963d8fe5 2481 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2482
2483 if (task->tk_status < 0) {
2484 switch (task->tk_status) {
2485 case -NFS4ERR_STALE_CLIENTID:
2486 case -NFS4ERR_EXPIRED:
2487 case -NFS4ERR_CB_PATH_DOWN:
2488 nfs4_schedule_state_recovery(clp);
2489 }
2490 return;
2491 }
2492 spin_lock(&clp->cl_lock);
2493 if (time_before(clp->cl_last_renewal,timestamp))
2494 clp->cl_last_renewal = timestamp;
2495 spin_unlock(&clp->cl_lock);
2496}
2497
963d8fe5
TM		 2498static const struct rpc_call_ops nfs4_renew_ops = {
2499 .rpc_call_done = nfs4_renew_done,
2500};
2501
b4454fe1 2502int nfs4_proc_async_renew(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2503{
2504 struct rpc_message msg = {
2505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2506 .rpc_argp = clp,
b4454fe1 2507 .rpc_cred = cred,
1da177e4
LT		 2508 };
2509
2510 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2511 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2512}
2513
b4454fe1 2514int nfs4_proc_renew(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2515{
2516 struct rpc_message msg = {
2517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2518 .rpc_argp = clp,
b4454fe1 2519 .rpc_cred = cred,
1da177e4
LT		 2520 };
2521 unsigned long now = jiffies;
2522 int status;
2523
2524 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2525 if (status < 0)
2526 return status;
2527 spin_lock(&clp->cl_lock);
2528 if (time_before(clp->cl_last_renewal,now))
2529 clp->cl_last_renewal = now;
2530 spin_unlock(&clp->cl_lock);
2531 return 0;
2532}
2533
aa1870af
BF		 2534static inline int nfs4_server_supports_acls(struct nfs_server *server)
2535{
2536 return (server->caps & NFS_CAP_ACLS)
2537 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2538 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2539}
2540
2541/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2542 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2543 * the stack.
2544 */
2545#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2546
2547static void buf_to_pages(const void *buf, size_t buflen,
2548 struct page **pages, unsigned int *pgbase)
2549{
2550 const void *p = buf;
2551
2552 *pgbase = offset_in_page(buf);
2553 p -= *pgbase;
2554 while (p < buf + buflen) {
2555 *(pages++) = virt_to_page(p);
2556 p += PAGE_CACHE_SIZE;
2557 }
2558}
2559
e50a1c2e
BF		 2560struct nfs4_cached_acl {
2561 int cached;
2562 size_t len;
3e9d4154 2563 char data[0];
e50a1c2e
BF		 2564};
2565
2566static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2567{
2568 struct nfs_inode *nfsi = NFS_I(inode);
2569
2570 spin_lock(&inode->i_lock);
2571 kfree(nfsi->nfs4_acl);
2572 nfsi->nfs4_acl = acl;
2573 spin_unlock(&inode->i_lock);
2574}
2575
2576static void nfs4_zap_acl_attr(struct inode *inode)
2577{
2578 nfs4_set_cached_acl(inode, NULL);
2579}
2580
2581static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2582{
2583 struct nfs_inode *nfsi = NFS_I(inode);
2584 struct nfs4_cached_acl *acl;
2585 int ret = -ENOENT;
2586
2587 spin_lock(&inode->i_lock);
2588 acl = nfsi->nfs4_acl;
2589 if (acl == NULL)
2590 goto out;
2591 if (buf == NULL) /* user is just asking for length */
2592 goto out_len;
2593 if (acl->cached == 0)
2594 goto out;
2595 ret = -ERANGE; /* see getxattr(2) man page */
2596 if (acl->len > buflen)
2597 goto out;
2598 memcpy(buf, acl->data, acl->len);
2599out_len:
2600 ret = acl->len;
2601out:
2602 spin_unlock(&inode->i_lock);
2603 return ret;
2604}
2605
2606static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2607{
2608 struct nfs4_cached_acl *acl;
2609
2610 if (buf && acl_len <= PAGE_SIZE) {
2611 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2612 if (acl == NULL)
2613 goto out;
2614 acl->cached = 1;
2615 memcpy(acl->data, buf, acl_len);
2616 } else {
2617 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2618 if (acl == NULL)
2619 goto out;
2620 acl->cached = 0;
2621 }
2622 acl->len = acl_len;
2623out:
2624 nfs4_set_cached_acl(inode, acl);
2625}
2626
2627static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2628{
aa1870af
BF		 2629 struct page *pages[NFS4ACL_MAXPAGES];
2630 struct nfs_getaclargs args = {
2631 .fh = NFS_FH(inode),
2632 .acl_pages = pages,
2633 .acl_len = buflen,
2634 };
2635 size_t resp_len = buflen;
e50a1c2e 2636 void *resp_buf;
aa1870af
BF		 2637 struct rpc_message msg = {
2638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2639 .rpc_argp = &args,
2640 .rpc_resp = &resp_len,
2641 };
e50a1c2e 2642 struct page *localpage = NULL;
aa1870af
BF		 2643 int ret;
2644
e50a1c2e
BF		 2645 if (buflen < PAGE_SIZE) {
2646 /* As long as we're doing a round trip to the server anyway,
2647 * let's be prepared for a page of acl data. */
2648 localpage = alloc_page(GFP_KERNEL);
2649 resp_buf = page_address(localpage);
2650 if (localpage == NULL)
2651 return -ENOMEM;
2652 args.acl_pages[0] = localpage;
2653 args.acl_pgbase = 0;
1d95db8e 2654 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2655 } else {
2656 resp_buf = buf;
2657 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2658 }
aa1870af 2659 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2660 if (ret)
2661 goto out_free;
2662 if (resp_len > args.acl_len)
2663 nfs4_write_cached_acl(inode, NULL, resp_len);
2664 else
2665 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2666 if (buf) {
2667 ret = -ERANGE;
2668 if (resp_len > buflen)
2669 goto out_free;
2670 if (localpage)
2671 memcpy(buf, resp_buf, resp_len);
2672 }
2673 ret = resp_len;
2674out_free:
2675 if (localpage)
2676 __free_page(localpage);
aa1870af
BF		 2677 return ret;
2678}
2679
e50a1c2e
BF		 2680static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2681{
2682 struct nfs_server *server = NFS_SERVER(inode);
2683 int ret;
2684
2685 if (!nfs4_server_supports_acls(server))
2686 return -EOPNOTSUPP;
2687 ret = nfs_revalidate_inode(server, inode);
2688 if (ret < 0)
2689 return ret;
2690 ret = nfs4_read_cached_acl(inode, buf, buflen);
2691 if (ret != -ENOENT)
2692 return ret;
2693 return nfs4_get_acl_uncached(inode, buf, buflen);
2694}
2695
4b580ee3
BF		 2696static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2697{
2698 struct nfs_server *server = NFS_SERVER(inode);
2699 struct page *pages[NFS4ACL_MAXPAGES];
2700 struct nfs_setaclargs arg = {
2701 .fh = NFS_FH(inode),
2702 .acl_pages = pages,
2703 .acl_len = buflen,
2704 };
2705 struct rpc_message msg = {
2706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2707 .rpc_argp = &arg,
2708 .rpc_resp = NULL,
2709 };
2710 int ret;
2711
2712 if (!nfs4_server_supports_acls(server))
2713 return -EOPNOTSUPP;
642ac549 2714 nfs_inode_return_delegation(inode);
4b580ee3
BF		 2715 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2716 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
e50a1c2e
BF		 2717 if (ret == 0)
2718 nfs4_write_cached_acl(inode, buf, buflen);
4b580ee3
BF		 2719 return ret;
2720}
2721
1da177e4 2722static int
faf5f49c 2723nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4
LT		 2724{
2725 struct nfs4_client *clp = server->nfs4_state;
2726
2727 if (!clp || task->tk_status >= 0)
2728 return 0;
2729 switch(task->tk_status) {
2730 case -NFS4ERR_STALE_CLIENTID:
2731 case -NFS4ERR_STALE_STATEID:
2732 case -NFS4ERR_EXPIRED:
2733 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2734 nfs4_schedule_state_recovery(clp);
433fbe4c 2735 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2736 rpc_wake_up_task(task);
2737 task->tk_status = 0;
2738 return -EAGAIN;
1da177e4 2739 case -NFS4ERR_DELAY:
006ea73e
CL		 2740 nfs_inc_server_stats((struct nfs_server *) server,
2741 NFSIOS_DELAY);
2742 case -NFS4ERR_GRACE:
1da177e4
LT		 2743 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2744 task->tk_status = 0;
2745 return -EAGAIN;
2746 case -NFS4ERR_OLD_STATEID:
2747 task->tk_status = 0;
2748 return -EAGAIN;
2749 }
2750 task->tk_status = nfs4_map_errors(task->tk_status);
2751 return 0;
2752}
2753
433fbe4c
TM		 2754static int nfs4_wait_bit_interruptible(void *word)
2755{
2756 if (signal_pending(current))
2757 return -ERESTARTSYS;
2758 schedule();
2759 return 0;
2760}
2761
1da177e4
LT		 2762static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2763{
1da177e4 2764 sigset_t oldset;
433fbe4c 2765 int res;
1da177e4
LT		 2766
2767 might_sleep();
2768
2769 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2770 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2771 nfs4_wait_bit_interruptible,
2772 TASK_INTERRUPTIBLE);
1da177e4
LT		 2773 rpc_clnt_sigunmask(clnt, &oldset);
2774 return res;
2775}
2776
2777static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2778{
2779 sigset_t oldset;
2780 int res = 0;
2781
2782 might_sleep();
2783
2784 if (*timeout <= 0)
2785 *timeout = NFS4_POLL_RETRY_MIN;
2786 if (*timeout > NFS4_POLL_RETRY_MAX)
2787 *timeout = NFS4_POLL_RETRY_MAX;
2788 rpc_clnt_sigmask(clnt, &oldset);
2789 if (clnt->cl_intr) {
041e0e3b 2790 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2791 if (signalled())
2792 res = -ERESTARTSYS;
041e0e3b
NA		 2793 } else
2794 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2795 rpc_clnt_sigunmask(clnt, &oldset);
2796 *timeout <<= 1;
2797 return res;
2798}
2799
2800/* This is the error handling routine for processes that are allowed
2801 * to sleep.
2802 */
faf5f49c 2803int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4
LT		 2804{
2805 struct nfs4_client *clp = server->nfs4_state;
2806 int ret = errorcode;
2807
2808 exception->retry = 0;
2809 switch(errorcode) {
2810 case 0:
2811 return 0;
2812 case -NFS4ERR_STALE_CLIENTID:
2813 case -NFS4ERR_STALE_STATEID:
2814 case -NFS4ERR_EXPIRED:
433fbe4c 2815 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2816 ret = nfs4_wait_clnt_recover(server->client, clp);
2817 if (ret == 0)
2818 exception->retry = 1;
2819 break;
2820 case -NFS4ERR_GRACE:
2821 case -NFS4ERR_DELAY:
2822 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2823 if (ret != 0)
2824 break;
1da177e4 2825 case -NFS4ERR_OLD_STATEID:
2c56617d 2826 exception->retry = 1;
1da177e4
LT		 2827 }
2828 /* We failed to handle the error */
2829 return nfs4_map_errors(ret);
2830}
2831
286d7d6a 2832int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2833{
2834 nfs4_verifier sc_verifier;
2835 struct nfs4_setclientid setclientid = {
2836 .sc_verifier = &sc_verifier,
2837 .sc_prog = program,
2838 };
2839 struct rpc_message msg = {
2840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2841 .rpc_argp = &setclientid,
2842 .rpc_resp = clp,
286d7d6a 2843 .rpc_cred = cred,
1da177e4
LT		 2844 };
2845 u32 *p;
2846 int loop = 0;
2847 int status;
2848
2849 p = (u32*)sc_verifier.data;
2850 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2851 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2852
2853 for(;;) {
2854 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2855 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2856 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
286d7d6a 2857 cred->cr_ops->cr_name,
1da177e4
LT		 2858 clp->cl_id_uniquifier);
2859 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2860 sizeof(setclientid.sc_netid), "tcp");
2861 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2862 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2863 clp->cl_ipaddr, port >> 8, port & 255);
2864
2865 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2866 if (status != -NFS4ERR_CLID_INUSE)
2867 break;
2868 if (signalled())
2869 break;
2870 if (loop++ & 1)
2871 ssleep(clp->cl_lease_time + 1);
2872 else
2873 if (++clp->cl_id_uniquifier == 0)
2874 break;
2875 }
2876 return status;
2877}
2878
51581f3b 2879static int _nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2880{
2881 struct nfs_fsinfo fsinfo;
2882 struct rpc_message msg = {
2883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2884 .rpc_argp = clp,
2885 .rpc_resp = &fsinfo,
286d7d6a 2886 .rpc_cred = cred,
1da177e4
LT		 2887 };
2888 unsigned long now;
2889 int status;
2890
2891 now = jiffies;
2892 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2893 if (status == 0) {
2894 spin_lock(&clp->cl_lock);
2895 clp->cl_lease_time = fsinfo.lease_time * HZ;
2896 clp->cl_last_renewal = now;
58d9714a 2897 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2898 spin_unlock(&clp->cl_lock);
2899 }
2900 return status;
2901}
2902
51581f3b
TM		 2903int nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
2904{
2905 long timeout;
2906 int err;
2907 do {
2908 err = _nfs4_proc_setclientid_confirm(clp, cred);
2909 switch (err) {
2910 case 0:
2911 return err;
2912 case -NFS4ERR_RESOURCE:
2913 /* The IBM lawyers misread another document! */
2914 case -NFS4ERR_DELAY:
2915 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2916 }
2917 } while (err == 0);
2918 return err;
2919}
2920
fe650407
TM		 2921struct nfs4_delegreturndata {
2922 struct nfs4_delegreturnargs args;
fa178f29 2923 struct nfs4_delegreturnres res;
fe650407
TM		 2924 struct nfs_fh fh;
2925 nfs4_stateid stateid;
2926 struct rpc_cred *cred;
26e976a8 2927 unsigned long timestamp;
fa178f29 2928 struct nfs_fattr fattr;
fe650407
TM		 2929 int rpc_status;
2930};
2931
2932static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2933{
fe650407 2934 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 2935 struct rpc_message msg = {
2936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 2937 .rpc_argp = &data->args,
fa178f29 2938 .rpc_resp = &data->res,
fe650407 2939 .rpc_cred = data->cred,
1da177e4 2940 };
fa178f29 2941 nfs_fattr_init(data->res.fattr);
fe650407
TM		 2942 rpc_call_setup(task, &msg, 0);
2943}
1da177e4 2944
fe650407
TM		 2945static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2946{
2947 struct nfs4_delegreturndata *data = calldata;
2948 data->rpc_status = task->tk_status;
26e976a8 2949 if (data->rpc_status == 0)
fa178f29 2950 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2951}
2952
2953static void nfs4_delegreturn_release(void *calldata)
2954{
2955 struct nfs4_delegreturndata *data = calldata;
2956
2957 put_rpccred(data->cred);
2958 kfree(calldata);
2959}
2960
c8d149f3 2961static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2962 .rpc_call_prepare = nfs4_delegreturn_prepare,
2963 .rpc_call_done = nfs4_delegreturn_done,
2964 .rpc_release = nfs4_delegreturn_release,
2965};
2966
2967static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2968{
2969 struct nfs4_delegreturndata *data;
fa178f29 2970 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 2971 struct rpc_task *task;
2972 int status;
2973
2974 data = kmalloc(sizeof(*data), GFP_KERNEL);
2975 if (data == NULL)
2976 return -ENOMEM;
2977 data->args.fhandle = &data->fh;
2978 data->args.stateid = &data->stateid;
fa178f29 2979 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 2980 nfs_copy_fh(&data->fh, NFS_FH(inode));
2981 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 2982 data->res.fattr = &data->fattr;
2983 data->res.server = server;
fe650407 2984 data->cred = get_rpccred(cred);
26e976a8 2985 data->timestamp = jiffies;
fe650407
TM		 2986 data->rpc_status = 0;
2987
2988 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 2989 if (IS_ERR(task))
fe650407 2990 return PTR_ERR(task);
fe650407 2991 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 2992 if (status == 0) {
fe650407 2993 status = data->rpc_status;
fa178f29
TM		 2994 if (status == 0)
2995 nfs_post_op_update_inode(inode, &data->fattr);
2996 }
fe650407
TM		 2997 rpc_release_task(task);
2998 return status;
1da177e4
LT		 2999}
3000
3001int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3002{
3003 struct nfs_server *server = NFS_SERVER(inode);
3004 struct nfs4_exception exception = { };
3005 int err;
3006 do {
3007 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3008 switch (err) {
3009 case -NFS4ERR_STALE_STATEID:
3010 case -NFS4ERR_EXPIRED:
3011 nfs4_schedule_state_recovery(server->nfs4_state);
3012 case 0:
3013 return 0;
3014 }
3015 err = nfs4_handle_exception(server, err, &exception);
3016 } while (exception.retry);
3017 return err;
3018}
3019
3020#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3021#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3022
3023/*
3024 * sleep, with exponential backoff, and retry the LOCK operation.
3025 */
3026static unsigned long
3027nfs4_set_lock_task_retry(unsigned long timeout)
3028{
041e0e3b 3029 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3030 timeout <<= 1;
3031 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3032 return NFS4_LOCK_MAXTIMEOUT;
3033 return timeout;
3034}
3035
1da177e4
LT		 3036static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3037{
3038 struct inode *inode = state->inode;
3039 struct nfs_server *server = NFS_SERVER(inode);
3040 struct nfs4_client *clp = server->nfs4_state;
911d1aaf 3041 struct nfs_lockt_args arg = {
1da177e4 3042 .fh = NFS_FH(inode),
911d1aaf 3043 .fl = request,
1da177e4 3044 };
911d1aaf
TM		 3045 struct nfs_lockt_res res = {
3046 .denied = request,
1da177e4
LT		 3047 };
3048 struct rpc_message msg = {
3049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3050 .rpc_argp = &arg,
3051 .rpc_resp = &res,
3052 .rpc_cred = state->owner->so_cred,
3053 };
1da177e4
LT		 3054 struct nfs4_lock_state *lsp;
3055 int status;
3056
3057 down_read(&clp->cl_sem);
911d1aaf 3058 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3059 status = nfs4_set_lock_state(state, request);
3060 if (status != 0)
3061 goto out;
3062 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3063 arg.lock_owner.id = lsp->ls_id;
1da177e4 3064 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3065 switch (status) {
3066 case 0:
3067 request->fl_type = F_UNLCK;
3068 break;
3069 case -NFS4ERR_DENIED:
3070 status = 0;
1da177e4 3071 }
8d0a8a9d 3072out:
1da177e4
LT		 3073 up_read(&clp->cl_sem);
3074 return status;
3075}
3076
3077static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3078{
3079 struct nfs4_exception exception = { };
3080 int err;
3081
3082 do {
3083 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3084 _nfs4_proc_getlk(state, cmd, request),
3085 &exception);
3086 } while (exception.retry);
3087 return err;
3088}
3089
3090static int do_vfs_lock(struct file *file, struct file_lock *fl)
3091{
3092 int res = 0;
3093 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3094 case FL_POSIX:
3095 res = posix_lock_file_wait(file, fl);
3096 break;
3097 case FL_FLOCK:
3098 res = flock_lock_file_wait(file, fl);
3099 break;
3100 default:
3101 BUG();
3102 }
3103 if (res < 0)
3104 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
3105 __FUNCTION__);
3106 return res;
3107}
3108
faf5f49c 3109struct nfs4_unlockdata {
911d1aaf
TM		 3110 struct nfs_locku_args arg;
3111 struct nfs_locku_res res;
faf5f49c
TM		 3112 struct nfs4_lock_state *lsp;
3113 struct nfs_open_context *ctx;
911d1aaf
TM		 3114 struct file_lock fl;
3115 const struct nfs_server *server;
26e976a8 3116 unsigned long timestamp;
faf5f49c
TM		 3117};
3118
911d1aaf
TM		 3119static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3120 struct nfs_open_context *ctx,
3121 struct nfs4_lock_state *lsp,
3122 struct nfs_seqid *seqid)
3123{
3124 struct nfs4_unlockdata *p;
3125 struct inode *inode = lsp->ls_state->inode;
3126
3127 p = kmalloc(sizeof(*p), GFP_KERNEL);
3128 if (p == NULL)
3129 return NULL;
3130 p->arg.fh = NFS_FH(inode);
3131 p->arg.fl = &p->fl;
3132 p->arg.seqid = seqid;
3133 p->arg.stateid = &lsp->ls_stateid;
3134 p->lsp = lsp;
3135 atomic_inc(&lsp->ls_count);
3136 /* Ensure we don't close file until we're done freeing locks! */
3137 p->ctx = get_nfs_open_context(ctx);
3138 memcpy(&p->fl, fl, sizeof(p->fl));
3139 p->server = NFS_SERVER(inode);
3140 return p;
3141}
3142
06f814a3 3143static void nfs4_locku_release_calldata(void *data)
faf5f49c 3144{
963d8fe5 3145 struct nfs4_unlockdata *calldata = data;
911d1aaf 3146 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3147 nfs4_put_lock_state(calldata->lsp);
3148 put_nfs_open_context(calldata->ctx);
3149 kfree(calldata);
faf5f49c
TM		 3150}
3151
963d8fe5 3152static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3153{
963d8fe5 3154 struct nfs4_unlockdata *calldata = data;
faf5f49c 3155
06f814a3
TM		 3156 if (RPC_ASSASSINATED(task))
3157 return;
911d1aaf 3158 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3159 switch (task->tk_status) {
3160 case 0:
3161 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3162 calldata->res.stateid.data,
faf5f49c 3163 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3164 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3165 break;
3166 case -NFS4ERR_STALE_STATEID:
3167 case -NFS4ERR_EXPIRED:
911d1aaf 3168 nfs4_schedule_state_recovery(calldata->server->nfs4_state);
faf5f49c
TM		 3169 break;
3170 default:
911d1aaf 3171 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
faf5f49c 3172 rpc_restart_call(task);
faf5f49c
TM		 3173 }
3174 }
faf5f49c
TM		 3175}
3176
4ce70ada 3177static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3178{
4ce70ada 3179 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3180 struct rpc_message msg = {
3181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3182 .rpc_argp = &calldata->arg,
3183 .rpc_resp = &calldata->res,
3184 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3185 };
faf5f49c 3186
911d1aaf 3187 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3188 return;
3189 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3190 /* Note: exit _without_ running nfs4_locku_done */
3191 task->tk_action = NULL;
faf5f49c
TM		 3192 return;
3193 }
26e976a8 3194 calldata->timestamp = jiffies;
faf5f49c
TM		 3195 rpc_call_setup(task, &msg, 0);
3196}
3197
963d8fe5 3198static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3199 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3200 .rpc_call_done = nfs4_locku_done,
06f814a3 3201 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3202};
3203
a5d16a4d
TM		 3204static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3205 struct nfs_open_context *ctx,
3206 struct nfs4_lock_state *lsp,
3207 struct nfs_seqid *seqid)
3208{
3209 struct nfs4_unlockdata *data;
a5d16a4d
TM		 3210
3211 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3212 if (data == NULL) {
3213 nfs_free_seqid(seqid);
3214 return ERR_PTR(-ENOMEM);
3215 }
3216
3217 /* Unlock _before_ we do the RPC call */
3218 do_vfs_lock(fl->fl_file, fl);
7a1218a2 3219 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM		 3220}
3221
faf5f49c
TM		 3222static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3223{
911d1aaf 3224 struct nfs_seqid *seqid;
1da177e4 3225 struct nfs4_lock_state *lsp;
06f814a3
TM		 3226 struct rpc_task *task;
3227 int status = 0;
faf5f49c 3228
6bfc93ef
TM		 3229 /* Is this a delegated lock? */
3230 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
911d1aaf
TM		 3231 goto out_unlock;
3232 /* Is this open_owner holding any locks on the server? */
3233 if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
3234 goto out_unlock;
6bfc93ef 3235
8d0a8a9d
TM		 3236 status = nfs4_set_lock_state(state, request);
3237 if (status != 0)
911d1aaf 3238 goto out_unlock;
8d0a8a9d 3239 lsp = request->fl_u.nfs4_fl.owner;
06f814a3 3240 status = -ENOMEM;
911d1aaf
TM		 3241 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3242 if (seqid == NULL)
3243 goto out_unlock;
a5d16a4d
TM		 3244 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3245 status = PTR_ERR(task);
3246 if (IS_ERR(task))
3247 goto out_unlock;
3248 status = nfs4_wait_for_completion_rpc_task(task);
3249 rpc_release_task(task);
911d1aaf 3250 return status;
911d1aaf 3251out_unlock:
faf5f49c 3252 do_vfs_lock(request->fl_file, request);
1da177e4
LT		 3253 return status;
3254}
3255
a5d16a4d
TM		 3256struct nfs4_lockdata {
3257 struct nfs_lock_args arg;
3258 struct nfs_lock_res res;
3259 struct nfs4_lock_state *lsp;
3260 struct nfs_open_context *ctx;
3261 struct file_lock fl;
26e976a8 3262 unsigned long timestamp;
a5d16a4d
TM		 3263 int rpc_status;
3264 int cancelled;
3265};
3266
3267static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3268 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3269{
a5d16a4d
TM		 3270 struct nfs4_lockdata *p;
3271 struct inode *inode = lsp->ls_state->inode;
1da177e4 3272 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3273
3274 p = kzalloc(sizeof(*p), GFP_KERNEL);
3275 if (p == NULL)
3276 return NULL;
3277
3278 p->arg.fh = NFS_FH(inode);
3279 p->arg.fl = &p->fl;
3280 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3281 if (p->arg.lock_seqid == NULL)
3282 goto out_free;
3283 p->arg.lock_stateid = &lsp->ls_stateid;
3284 p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
3285 p->arg.lock_owner.id = lsp->ls_id;
3286 p->lsp = lsp;
3287 atomic_inc(&lsp->ls_count);
3288 p->ctx = get_nfs_open_context(ctx);
3289 memcpy(&p->fl, fl, sizeof(p->fl));
3290 return p;
3291out_free:
3292 kfree(p);
3293 return NULL;
3294}
3295
3296static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3297{
3298 struct nfs4_lockdata *data = calldata;
3299 struct nfs4_state *state = data->lsp->ls_state;
3300 struct nfs4_state_owner *sp = state->owner;
1da177e4 3301 struct rpc_message msg = {
a5d16a4d
TM		 3302 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3303 .rpc_argp = &data->arg,
3304 .rpc_resp = &data->res,
3305 .rpc_cred = sp->so_cred,
1da177e4 3306 };
06735b34 3307
a5d16a4d
TM		 3308 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3309 return;
3310 dprintk("%s: begin!\n", __FUNCTION__);
3311 /* Do we need to do an open_to_lock_owner? */
3312 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3313 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3314 if (data->arg.open_seqid == NULL) {
3315 data->rpc_status = -ENOMEM;
3316 task->tk_action = NULL;
06735b34 3317 goto out;
8d0a8a9d 3318 }
a5d16a4d
TM		 3319 data->arg.open_stateid = &state->stateid;
3320 data->arg.new_lock_owner = 1;
3321 }
26e976a8 3322 data->timestamp = jiffies;
a5d16a4d 3323 rpc_call_setup(task, &msg, 0);
06735b34 3324out:
a5d16a4d
TM		 3325 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3326}
3327
3328static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3329{
3330 struct nfs4_lockdata *data = calldata;
3331
3332 dprintk("%s: begin!\n", __FUNCTION__);
3333
3334 data->rpc_status = task->tk_status;
3335 if (RPC_ASSASSINATED(task))
3336 goto out;
3337 if (data->arg.new_lock_owner != 0) {
3338 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3339 if (data->rpc_status == 0)
3340 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3341 else
3342 goto out;
3343 }
3344 if (data->rpc_status == 0) {
3345 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3346 sizeof(data->lsp->ls_stateid.data));
3347 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
26e976a8 3348 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3349 }
3350 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3351out:
3352 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3353}
3354
3355static void nfs4_lock_release(void *calldata)
3356{
3357 struct nfs4_lockdata *data = calldata;
3358
3359 dprintk("%s: begin!\n", __FUNCTION__);
3360 if (data->arg.open_seqid != NULL)
3361 nfs_free_seqid(data->arg.open_seqid);
3362 if (data->cancelled != 0) {
3363 struct rpc_task *task;
3364 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3365 data->arg.lock_seqid);
3366 if (!IS_ERR(task))
3367 rpc_release_task(task);
3368 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3369 } else
3370 nfs_free_seqid(data->arg.lock_seqid);
3371 nfs4_put_lock_state(data->lsp);
3372 put_nfs_open_context(data->ctx);
3373 kfree(data);
3374 dprintk("%s: done!\n", __FUNCTION__);
3375}
3376
3377static const struct rpc_call_ops nfs4_lock_ops = {
3378 .rpc_call_prepare = nfs4_lock_prepare,
3379 .rpc_call_done = nfs4_lock_done,
3380 .rpc_release = nfs4_lock_release,
3381};
3382
3383static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3384{
3385 struct nfs4_lockdata *data;
3386 struct rpc_task *task;
3387 int ret;
3388
3389 dprintk("%s: begin!\n", __FUNCTION__);
3390 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3391 fl->fl_u.nfs4_fl.owner);
3392 if (data == NULL)
3393 return -ENOMEM;
3394 if (IS_SETLKW(cmd))
3395 data->arg.block = 1;
3396 if (reclaim != 0)
3397 data->arg.reclaim = 1;
3398 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3399 &nfs4_lock_ops, data);
7a1218a2 3400 if (IS_ERR(task))
a5d16a4d 3401 return PTR_ERR(task);
a5d16a4d
TM		 3402 ret = nfs4_wait_for_completion_rpc_task(task);
3403 if (ret == 0) {
3404 ret = data->rpc_status;
3405 if (ret == -NFS4ERR_DENIED)
3406 ret = -EAGAIN;
3407 } else
3408 data->cancelled = 1;
3409 rpc_release_task(task);
3410 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3411 return ret;
1da177e4
LT		 3412}
3413
3414static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3415{
202b50dc
TM		 3416 struct nfs_server *server = NFS_SERVER(state->inode);
3417 struct nfs4_exception exception = { };
3418 int err;
3419
6bfc93ef
TM		 3420 /* Cache the lock if possible... */
3421 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3422 return 0;
202b50dc
TM		 3423 do {
3424 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3425 if (err != -NFS4ERR_DELAY)
3426 break;
3427 nfs4_handle_exception(server, err, &exception);
3428 } while (exception.retry);
3429 return err;
1da177e4
LT		 3430}
3431
3432static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3433{
202b50dc
TM		 3434 struct nfs_server *server = NFS_SERVER(state->inode);
3435 struct nfs4_exception exception = { };
3436 int err;
3437
6bfc93ef
TM		 3438 err = nfs4_set_lock_state(state, request);
3439 if (err != 0)
3440 return err;
202b50dc
TM		 3441 do {
3442 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3443 if (err != -NFS4ERR_DELAY)
3444 break;
3445 nfs4_handle_exception(server, err, &exception);
3446 } while (exception.retry);
3447 return err;
1da177e4
LT		 3448}
3449
3450static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3451{
3452 struct nfs4_client *clp = state->owner->so_client;
3453 int status;
3454
6bfc93ef 3455 /* Is this a delegated open? */
ff604066 3456 if (NFS_I(state->inode)->delegation_state != 0) {
6bfc93ef
TM		 3457 /* Yes: cache locks! */
3458 status = do_vfs_lock(request->fl_file, request);
3459 /* ...but avoid races with delegation recall... */
3460 if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
ff604066 3461 return status;
1da177e4 3462 }
ff604066 3463 down_read(&clp->cl_sem);
6bfc93ef
TM		 3464 status = nfs4_set_lock_state(state, request);
3465 if (status != 0)
3466 goto out;
3467 status = _nfs4_do_setlk(state, cmd, request, 0);
3468 if (status != 0)
3469 goto out;
3470 /* Note: we always want to sleep here! */
3471 request->fl_flags |= FL_SLEEP;
3472 if (do_vfs_lock(request->fl_file, request) < 0)
3473 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3474out:
1da177e4
LT		 3475 up_read(&clp->cl_sem);
3476 return status;
3477}
3478
3479static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3480{
3481 struct nfs4_exception exception = { };
3482 int err;
3483
3484 do {
3485 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3486 _nfs4_proc_setlk(state, cmd, request),
3487 &exception);
3488 } while (exception.retry);
3489 return err;
3490}
3491
3492static int
3493nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3494{
3495 struct nfs_open_context *ctx;
3496 struct nfs4_state *state;
3497 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3498 int status;
3499
3500 /* verify open state */
3501 ctx = (struct nfs_open_context *)filp->private_data;
3502 state = ctx->state;
3503
3504 if (request->fl_start < 0 || request->fl_end < 0)
3505 return -EINVAL;
3506
3507 if (IS_GETLK(cmd))
3508 return nfs4_proc_getlk(state, F_GETLK, request);
3509
3510 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3511 return -EINVAL;
3512
3513 if (request->fl_type == F_UNLCK)
3514 return nfs4_proc_unlck(state, cmd, request);
3515
3516 do {
3517 status = nfs4_proc_setlk(state, cmd, request);
3518 if ((status != -EAGAIN) || IS_SETLK(cmd))
3519 break;
3520 timeout = nfs4_set_lock_task_retry(timeout);
3521 status = -ERESTARTSYS;
3522 if (signalled())
3523 break;
3524 } while(status < 0);
1da177e4
LT		 3525 return status;
3526}
3527
888e694c
TM		 3528int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3529{
3530 struct nfs_server *server = NFS_SERVER(state->inode);
3531 struct nfs4_exception exception = { };
3532 int err;
3533
3534 err = nfs4_set_lock_state(state, fl);
3535 if (err != 0)
3536 goto out;
3537 do {
3538 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3539 if (err != -NFS4ERR_DELAY)
3540 break;
3541 err = nfs4_handle_exception(server, err, &exception);
3542 } while (exception.retry);
3543out:
3544 return err;
3545}
6b3b5496 3546
aa1870af
BF		 3547#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3548
6b3b5496
BF		 3549int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3550 size_t buflen, int flags)
3551{
4b580ee3
BF		 3552 struct inode *inode = dentry->d_inode;
3553
3554 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3555 return -EOPNOTSUPP;
3556
3557 if (!S_ISREG(inode->i_mode) &&
3558 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3559 return -EPERM;
3560
3561 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3562}
3563
3564/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3565 * and that's what we'll do for e.g. user attributes that haven't been set.
3566 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3567 * attributes in kernel-managed attribute namespaces. */
3568ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3569 size_t buflen)
3570{
aa1870af
BF		 3571 struct inode *inode = dentry->d_inode;
3572
3573 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3574 return -EOPNOTSUPP;
3575
3576 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3577}
3578
3579ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3580{
aa1870af 3581 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3582
096455a2
BF		 3583 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3584 return 0;
6b3b5496
BF		 3585 if (buf && buflen < len)
3586 return -ERANGE;
3587 if (buf)
aa1870af
BF		 3588 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3589 return len;
6b3b5496
BF		 3590}
3591
683b57b4 3592int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
7aaa0b3b 3593 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3594{
3595 struct nfs_server *server = NFS_SERVER(dir);
3596 u32 bitmask[2] = {
361e624f
MN		 3597 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3598 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3599 };
3600 struct nfs4_fs_locations_arg args = {
3601 .dir_fh = NFS_FH(dir),
3602 .name = &dentry->d_name,
3603 .page = page,
3604 .bitmask = bitmask,
3605 };
3606 struct rpc_message msg = {
3607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3608 .rpc_argp = &args,
7aaa0b3b 3609 .rpc_resp = fs_locations,
683b57b4
TM		 3610 };
3611 int status;
3612
3613 dprintk("%s: start\n", __FUNCTION__);
3614 fs_locations->fattr.valid = 0;
3615 fs_locations->server = server;
830b8e33 3616 fs_locations->nlocations = 0;
683b57b4
TM		 3617 status = rpc_call_sync(server->client, &msg, 0);
3618 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3619 return status;
3620}
3621
1da177e4
LT		 3622struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3623 .recover_open = nfs4_open_reclaim,
3624 .recover_lock = nfs4_lock_reclaim,
3625};
3626
3627struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3628 .recover_open = nfs4_open_expired,
3629 .recover_lock = nfs4_lock_expired,
3630};
3631
6b3b5496
BF		 3632static struct inode_operations nfs4_file_inode_operations = {
3633 .permission = nfs_permission,
3634 .getattr = nfs_getattr,
3635 .setattr = nfs_setattr,
3636 .getxattr = nfs4_getxattr,
3637 .setxattr = nfs4_setxattr,
3638 .listxattr = nfs4_listxattr,
3639};
3640
1da177e4
LT		 3641struct nfs_rpc_ops nfs_v4_clientops = {
3642 .version = 4, /* protocol version */
3643 .dentry_ops = &nfs4_dentry_operations,
3644 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3645 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3646 .getroot = nfs4_proc_get_root,
3647 .getattr = nfs4_proc_getattr,
3648 .setattr = nfs4_proc_setattr,
3649 .lookup = nfs4_proc_lookup,
3650 .access = nfs4_proc_access,
3651 .readlink = nfs4_proc_readlink,
3652 .read = nfs4_proc_read,
3653 .write = nfs4_proc_write,
3654 .commit = nfs4_proc_commit,
3655 .create = nfs4_proc_create,
3656 .remove = nfs4_proc_remove,
3657 .unlink_setup = nfs4_proc_unlink_setup,
3658 .unlink_done = nfs4_proc_unlink_done,
3659 .rename = nfs4_proc_rename,
3660 .link = nfs4_proc_link,
3661 .symlink = nfs4_proc_symlink,
3662 .mkdir = nfs4_proc_mkdir,
3663 .rmdir = nfs4_proc_remove,
3664 .readdir = nfs4_proc_readdir,
3665 .mknod = nfs4_proc_mknod,
3666 .statfs = nfs4_proc_statfs,
3667 .fsinfo = nfs4_proc_fsinfo,
3668 .pathconf = nfs4_proc_pathconf,
3669 .decode_dirent = nfs4_decode_dirent,
3670 .read_setup = nfs4_proc_read_setup,
ec06c096 3671 .read_done = nfs4_read_done,
1da177e4 3672 .write_setup = nfs4_proc_write_setup,
788e7a89 3673 .write_done = nfs4_write_done,
1da177e4 3674 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3675 .commit_done = nfs4_commit_done,
02a913a7
TM		 3676 .file_open = nfs_open,
3677 .file_release = nfs_release,
1da177e4 3678 .lock = nfs4_proc_lock,
e50a1c2e 3679 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3680};
3681
3682/*
3683 * Local variables:
3684 * c-basic-offset: 8
3685 * End:
3686 */
Clone of davem's net-next-2.6 tree