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NFS: Make nfs_fhget() return appropriate error values
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
006ea73e 54#include "iostat.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
58#define NFS4_POLL_RETRY_MIN (1*HZ)
59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
cdd4e68b 61struct nfs4_opendata;
864472e9 62static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 63static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 64static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
1da177e4 65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
faf5f49c 66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
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
124static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
125 struct nfs4_readdir_arg *readdir)
126{
127 u32 *start, *p;
128
129 BUG_ON(readdir->count < 80);
130 if (cookie > 2) {
b7ef1956 131 readdir->cookie = cookie;
1da177e4
LT		 132 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
133 return;
134 }
135
136 readdir->cookie = 0;
137 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
138 if (cookie == 2)
139 return;
140
141 /*
142 * NFSv4 servers do not return entries for '.' and '..'
143 * Therefore, we fake these entries here. We let '.'
144 * have cookie 0 and '..' have cookie 1. Note that
145 * when talking to the server, we always send cookie 0
146 * instead of 1 or 2.
147 */
148 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
149
150 if (cookie == 0) {
151 *p++ = xdr_one; /* next */
152 *p++ = xdr_zero; /* cookie, first word */
153 *p++ = xdr_one; /* cookie, second word */
154 *p++ = xdr_one; /* entry len */
155 memcpy(p, ".\0\0\0", 4); /* entry */
156 p++;
157 *p++ = xdr_one; /* bitmap length */
158 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
159 *p++ = htonl(8); /* attribute buffer length */
160 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
161 }
162
163 *p++ = xdr_one; /* next */
164 *p++ = xdr_zero; /* cookie, first word */
165 *p++ = xdr_two; /* cookie, second word */
166 *p++ = xdr_two; /* entry len */
167 memcpy(p, "..\0\0", 4); /* entry */
168 p++;
169 *p++ = xdr_one; /* bitmap length */
170 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
171 *p++ = htonl(8); /* attribute buffer length */
172 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
173
174 readdir->pgbase = (char *)p - (char *)start;
175 readdir->count -= readdir->pgbase;
176 kunmap_atomic(start, KM_USER0);
177}
178
26e976a8 179static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4
LT		 180{
181 struct nfs4_client *clp = server->nfs4_state;
182 spin_lock(&clp->cl_lock);
183 if (time_before(clp->cl_last_renewal,timestamp))
184 clp->cl_last_renewal = timestamp;
185 spin_unlock(&clp->cl_lock);
186}
187
188static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo)
189{
190 struct nfs_inode *nfsi = NFS_I(inode);
191
decf491f
TM		 192 spin_lock(&inode->i_lock);
193 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
1da177e4
LT		 194 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
195 nfsi->change_attr = cinfo->after;
decf491f 196 spin_unlock(&inode->i_lock);
1da177e4
LT		 197}
198
e56e0b78 199struct nfs4_opendata {
24ac23ab 200 atomic_t count;
e56e0b78
TM		 201 struct nfs_openargs o_arg;
202 struct nfs_openres o_res;
cdd4e68b
TM		 203 struct nfs_open_confirmargs c_arg;
204 struct nfs_open_confirmres c_res;
e56e0b78
TM		 205 struct nfs_fattr f_attr;
206 struct nfs_fattr dir_attr;
207 struct dentry *dentry;
208 struct dentry *dir;
209 struct nfs4_state_owner *owner;
210 struct iattr attrs;
26e976a8 211 unsigned long timestamp;
24ac23ab
TM		 212 int rpc_status;
213 int cancelled;
e56e0b78
TM		 214};
215
216static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
217 struct nfs4_state_owner *sp, int flags,
218 const struct iattr *attrs)
219{
220 struct dentry *parent = dget_parent(dentry);
221 struct inode *dir = parent->d_inode;
222 struct nfs_server *server = NFS_SERVER(dir);
223 struct nfs4_opendata *p;
224
225 p = kzalloc(sizeof(*p), GFP_KERNEL);
226 if (p == NULL)
227 goto err;
228 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
229 if (p->o_arg.seqid == NULL)
230 goto err_free;
24ac23ab 231 atomic_set(&p->count, 1);
e56e0b78
TM		 232 p->dentry = dget(dentry);
233 p->dir = parent;
234 p->owner = sp;
235 atomic_inc(&sp->so_count);
236 p->o_arg.fh = NFS_FH(dir);
237 p->o_arg.open_flags = flags,
238 p->o_arg.clientid = server->nfs4_state->cl_clientid;
239 p->o_arg.id = sp->so_id;
240 p->o_arg.name = &dentry->d_name;
241 p->o_arg.server = server;
242 p->o_arg.bitmask = server->attr_bitmask;
243 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
244 p->o_res.f_attr = &p->f_attr;
245 p->o_res.dir_attr = &p->dir_attr;
246 p->o_res.server = server;
247 nfs_fattr_init(&p->f_attr);
248 nfs_fattr_init(&p->dir_attr);
249 if (flags & O_EXCL) {
250 u32 *s = (u32 *) p->o_arg.u.verifier.data;
251 s[0] = jiffies;
252 s[1] = current->pid;
253 } else if (flags & O_CREAT) {
254 p->o_arg.u.attrs = &p->attrs;
255 memcpy(&p->attrs, attrs, sizeof(p->attrs));
256 }
cdd4e68b
TM		 257 p->c_arg.fh = &p->o_res.fh;
258 p->c_arg.stateid = &p->o_res.stateid;
259 p->c_arg.seqid = p->o_arg.seqid;
e56e0b78
TM		 260 return p;
261err_free:
262 kfree(p);
263err:
264 dput(parent);
265 return NULL;
266}
267
268static void nfs4_opendata_free(struct nfs4_opendata *p)
269{
24ac23ab 270 if (p != NULL && atomic_dec_and_test(&p->count)) {
e56e0b78
TM		 271 nfs_free_seqid(p->o_arg.seqid);
272 nfs4_put_state_owner(p->owner);
273 dput(p->dir);
274 dput(p->dentry);
275 kfree(p);
276 }
277}
278
9512135d 279/* Helper for asynchronous RPC calls */
4ce70ada 280static int nfs4_call_async(struct rpc_clnt *clnt,
963d8fe5 281 const struct rpc_call_ops *tk_ops, void *calldata)
9512135d
TM		 282{
283 struct rpc_task *task;
284
963d8fe5 285 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
9512135d 286 return -ENOMEM;
9512135d
TM		 287 rpc_execute(task);
288 return 0;
289}
290
06f814a3
TM		 291static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
292{
293 sigset_t oldset;
294 int ret;
295
296 rpc_clnt_sigmask(task->tk_client, &oldset);
297 ret = rpc_wait_for_completion_task(task);
298 rpc_clnt_sigunmask(task->tk_client, &oldset);
299 return ret;
300}
301
e7616923
TM		 302static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
303{
304 switch (open_flags) {
305 case FMODE_WRITE:
306 state->n_wronly++;
307 break;
308 case FMODE_READ:
309 state->n_rdonly++;
310 break;
311 case FMODE_READ|FMODE_WRITE:
312 state->n_rdwr++;
313 }
314}
315
1da177e4
LT		 316static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
317{
318 struct inode *inode = state->inode;
319
320 open_flags &= (FMODE_READ|FMODE_WRITE);
d530838b 321 /* Protect against nfs4_find_state_byowner() */
ec073428 322 spin_lock(&state->owner->so_lock);
1da177e4 323 spin_lock(&inode->i_lock);
4cecb76f 324 memcpy(&state->stateid, stateid, sizeof(state->stateid));
e7616923 325 update_open_stateflags(state, open_flags);
4cecb76f 326 nfs4_state_set_mode_locked(state, state->state | open_flags);
1da177e4 327 spin_unlock(&inode->i_lock);
ec073428 328 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 329}
330
24ac23ab
TM		 331static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
332{
333 struct inode *inode;
334 struct nfs4_state *state = NULL;
335
336 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
337 goto out;
338 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
03f28e3a 339 if (IS_ERR(inode))
24ac23ab
TM		 340 goto out;
341 state = nfs4_get_open_state(inode, data->owner);
342 if (state == NULL)
343 goto put_inode;
344 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
345put_inode:
346 iput(inode);
347out:
348 return state;
349}
350
864472e9
TM		 351static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
352{
353 struct nfs_inode *nfsi = NFS_I(state->inode);
354 struct nfs_open_context *ctx;
355
356 spin_lock(&state->inode->i_lock);
357 list_for_each_entry(ctx, &nfsi->open_files, list) {
358 if (ctx->state != state)
359 continue;
360 get_nfs_open_context(ctx);
361 spin_unlock(&state->inode->i_lock);
362 return ctx;
363 }
364 spin_unlock(&state->inode->i_lock);
365 return ERR_PTR(-ENOENT);
366}
367
368static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
369{
370 int ret;
371
372 opendata->o_arg.open_flags = openflags;
373 ret = _nfs4_proc_open(opendata);
374 if (ret != 0)
375 return ret;
376 memcpy(stateid->data, opendata->o_res.stateid.data,
377 sizeof(stateid->data));
378 return 0;
379}
380
381static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
382{
383 nfs4_stateid stateid;
384 struct nfs4_state *newstate;
385 int mode = 0;
386 int delegation = 0;
387 int ret;
388
389 /* memory barrier prior to reading state->n_* */
390 smp_rmb();
391 if (state->n_rdwr != 0) {
392 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
393 if (ret != 0)
394 return ret;
395 mode |= FMODE_READ|FMODE_WRITE;
396 if (opendata->o_res.delegation_type != 0)
397 delegation = opendata->o_res.delegation_type;
398 smp_rmb();
399 }
400 if (state->n_wronly != 0) {
401 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
402 if (ret != 0)
403 return ret;
404 mode |= FMODE_WRITE;
405 if (opendata->o_res.delegation_type != 0)
406 delegation = opendata->o_res.delegation_type;
407 smp_rmb();
408 }
409 if (state->n_rdonly != 0) {
410 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
411 if (ret != 0)
412 return ret;
413 mode |= FMODE_READ;
414 }
415 clear_bit(NFS_DELEGATED_STATE, &state->flags);
416 if (mode == 0)
417 return 0;
418 if (opendata->o_res.delegation_type == 0)
419 opendata->o_res.delegation_type = delegation;
420 opendata->o_arg.open_flags |= mode;
421 newstate = nfs4_opendata_to_nfs4_state(opendata);
422 if (newstate != NULL) {
423 if (opendata->o_res.delegation_type != 0) {
424 struct nfs_inode *nfsi = NFS_I(newstate->inode);
425 int delegation_flags = 0;
426 if (nfsi->delegation)
427 delegation_flags = nfsi->delegation->flags;
428 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
429 nfs_inode_set_delegation(newstate->inode,
430 opendata->owner->so_cred,
431 &opendata->o_res);
432 else
433 nfs_inode_reclaim_delegation(newstate->inode,
434 opendata->owner->so_cred,
435 &opendata->o_res);
436 }
437 nfs4_close_state(newstate, opendata->o_arg.open_flags);
438 }
439 if (newstate != state)
440 return -ESTALE;
441 return 0;
442}
443
1da177e4
LT		 444/*
445 * OPEN_RECLAIM:
446 * reclaim state on the server after a reboot.
1da177e4 447 */
864472e9 448static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4 449{
864472e9
TM		 450 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
451 struct nfs4_opendata *opendata;
452 int delegation_type = 0;
1da177e4
LT		 453 int status;
454
455 if (delegation != NULL) {
456 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
457 memcpy(&state->stateid, &delegation->stateid,
458 sizeof(state->stateid));
459 set_bit(NFS_DELEGATED_STATE, &state->flags);
460 return 0;
461 }
864472e9 462 delegation_type = delegation->type;
1da177e4 463 }
864472e9
TM		 464 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
465 if (opendata == NULL)
cee54fc9 466 return -ENOMEM;
864472e9
TM		 467 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
468 opendata->o_arg.fh = NFS_FH(state->inode);
469 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
470 opendata->o_arg.u.delegation_type = delegation_type;
471 status = nfs4_open_recover(opendata, state);
472 nfs4_opendata_free(opendata);
1da177e4
LT		 473 return status;
474}
475
864472e9 476static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4
LT		 477{
478 struct nfs_server *server = NFS_SERVER(state->inode);
479 struct nfs4_exception exception = { };
480 int err;
481 do {
864472e9 482 err = _nfs4_do_open_reclaim(sp, state, dentry);
202b50dc
TM		 483 if (err != -NFS4ERR_DELAY)
484 break;
485 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 486 } while (exception.retry);
487 return err;
488}
489
864472e9
TM		 490static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
491{
492 struct nfs_open_context *ctx;
493 int ret;
494
495 ctx = nfs4_state_find_open_context(state);
496 if (IS_ERR(ctx))
497 return PTR_ERR(ctx);
498 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
499 put_nfs_open_context(ctx);
500 return ret;
501}
502
1da177e4
LT		 503static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
504{
505 struct nfs4_state_owner *sp = state->owner;
e56e0b78 506 struct nfs4_opendata *opendata;
864472e9 507 int ret;
1da177e4 508
1da177e4 509 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
864472e9
TM		 510 return 0;
511 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
e56e0b78 512 if (opendata == NULL)
864472e9 513 return -ENOMEM;
e56e0b78 514 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
e56e0b78
TM		 515 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
516 sizeof(opendata->o_arg.u.delegation.data));
864472e9 517 ret = nfs4_open_recover(opendata, state);
e56e0b78 518 nfs4_opendata_free(opendata);
864472e9 519 return ret;
1da177e4
LT		 520}
521
522int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
523{
524 struct nfs4_exception exception = { };
525 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
526 int err;
527 do {
528 err = _nfs4_open_delegation_recall(dentry, state);
529 switch (err) {
530 case 0:
531 return err;
532 case -NFS4ERR_STALE_CLIENTID:
533 case -NFS4ERR_STALE_STATEID:
534 case -NFS4ERR_EXPIRED:
535 /* Don't recall a delegation if it was lost */
536 nfs4_schedule_state_recovery(server->nfs4_state);
537 return err;
538 }
539 err = nfs4_handle_exception(server, err, &exception);
540 } while (exception.retry);
541 return err;
542}
543
cdd4e68b 544static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 545{
cdd4e68b
TM		 546 struct nfs4_opendata *data = calldata;
547 struct rpc_message msg = {
548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
549 .rpc_argp = &data->c_arg,
550 .rpc_resp = &data->c_res,
551 .rpc_cred = data->owner->so_cred,
1da177e4 552 };
26e976a8 553 data->timestamp = jiffies;
cdd4e68b
TM		 554 rpc_call_setup(task, &msg, 0);
555}
556
557static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
558{
559 struct nfs4_opendata *data = calldata;
560
561 data->rpc_status = task->tk_status;
562 if (RPC_ASSASSINATED(task))
563 return;
26e976a8 564 if (data->rpc_status == 0) {
cdd4e68b
TM		 565 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
566 sizeof(data->o_res.stateid.data));
26e976a8
TM		 567 renew_lease(data->o_res.server, data->timestamp);
568 }
cdd4e68b
TM		 569 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
570 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
571}
572
573static void nfs4_open_confirm_release(void *calldata)
574{
575 struct nfs4_opendata *data = calldata;
576 struct nfs4_state *state = NULL;
577
578 /* If this request hasn't been cancelled, do nothing */
579 if (data->cancelled == 0)
580 goto out_free;
581 /* In case of error, no cleanup! */
582 if (data->rpc_status != 0)
583 goto out_free;
584 nfs_confirm_seqid(&data->owner->so_seqid, 0);
585 state = nfs4_opendata_to_nfs4_state(data);
586 if (state != NULL)
587 nfs4_close_state(state, data->o_arg.open_flags);
588out_free:
589 nfs4_opendata_free(data);
590}
591
592static const struct rpc_call_ops nfs4_open_confirm_ops = {
593 .rpc_call_prepare = nfs4_open_confirm_prepare,
594 .rpc_call_done = nfs4_open_confirm_done,
595 .rpc_release = nfs4_open_confirm_release,
596};
597
598/*
599 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
600 */
601static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
602{
603 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
604 struct rpc_task *task;
1da177e4
LT		 605 int status;
606
cdd4e68b
TM		 607 atomic_inc(&data->count);
608 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
609 if (IS_ERR(task)) {
610 nfs4_opendata_free(data);
611 return PTR_ERR(task);
612 }
613 status = nfs4_wait_for_completion_rpc_task(task);
614 if (status != 0) {
615 data->cancelled = 1;
616 smp_wmb();
617 } else
618 status = data->rpc_status;
619 rpc_release_task(task);
1da177e4
LT		 620 return status;
621}
622
24ac23ab 623static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 624{
24ac23ab
TM		 625 struct nfs4_opendata *data = calldata;
626 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 627 struct rpc_message msg = {
628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 629 .rpc_argp = &data->o_arg,
630 .rpc_resp = &data->o_res,
1da177e4
LT		 631 .rpc_cred = sp->so_cred,
632 };
24ac23ab
TM		 633
634 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
635 return;
636 /* Update sequence id. */
637 data->o_arg.id = sp->so_id;
638 data->o_arg.clientid = sp->so_client->cl_clientid;
864472e9
TM		 639 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
640 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
26e976a8 641 data->timestamp = jiffies;
24ac23ab
TM		 642 rpc_call_setup(task, &msg, 0);
643}
1da177e4 644
24ac23ab
TM		 645static void nfs4_open_done(struct rpc_task *task, void *calldata)
646{
647 struct nfs4_opendata *data = calldata;
1da177e4 648
24ac23ab
TM		 649 data->rpc_status = task->tk_status;
650 if (RPC_ASSASSINATED(task))
651 return;
652 if (task->tk_status == 0) {
653 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 654 case S_IFREG:
655 break;
656 case S_IFLNK:
24ac23ab 657 data->rpc_status = -ELOOP;
6f926b5b
TM		 658 break;
659 case S_IFDIR:
24ac23ab 660 data->rpc_status = -EISDIR;
6f926b5b
TM		 661 break;
662 default:
24ac23ab 663 data->rpc_status = -ENOTDIR;
6f926b5b 664 }
26e976a8 665 renew_lease(data->o_res.server, data->timestamp);
6f926b5b 666 }
24ac23ab
TM		 667 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
668}
6f926b5b 669
24ac23ab
TM		 670static void nfs4_open_release(void *calldata)
671{
672 struct nfs4_opendata *data = calldata;
673 struct nfs4_state *state = NULL;
674
675 /* If this request hasn't been cancelled, do nothing */
676 if (data->cancelled == 0)
677 goto out_free;
678 /* In case of error, no cleanup! */
679 if (data->rpc_status != 0)
680 goto out_free;
681 /* In case we need an open_confirm, no cleanup! */
682 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
683 goto out_free;
684 nfs_confirm_seqid(&data->owner->so_seqid, 0);
685 state = nfs4_opendata_to_nfs4_state(data);
686 if (state != NULL)
687 nfs4_close_state(state, data->o_arg.open_flags);
688out_free:
689 nfs4_opendata_free(data);
690}
691
692static const struct rpc_call_ops nfs4_open_ops = {
693 .rpc_call_prepare = nfs4_open_prepare,
694 .rpc_call_done = nfs4_open_done,
695 .rpc_release = nfs4_open_release,
696};
697
698/*
699 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
700 */
701static int _nfs4_proc_open(struct nfs4_opendata *data)
702{
703 struct inode *dir = data->dir->d_inode;
704 struct nfs_server *server = NFS_SERVER(dir);
705 struct nfs_openargs *o_arg = &data->o_arg;
706 struct nfs_openres *o_res = &data->o_res;
707 struct rpc_task *task;
708 int status;
709
710 atomic_inc(&data->count);
711 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
712 if (IS_ERR(task)) {
713 nfs4_opendata_free(data);
714 return PTR_ERR(task);
715 }
716 status = nfs4_wait_for_completion_rpc_task(task);
717 if (status != 0) {
718 data->cancelled = 1;
719 smp_wmb();
720 } else
721 status = data->rpc_status;
722 rpc_release_task(task);
1da177e4 723 if (status != 0)
24ac23ab
TM		 724 return status;
725
56ae19f3
TM		 726 if (o_arg->open_flags & O_CREAT) {
727 update_changeattr(dir, &o_res->cinfo);
728 nfs_post_op_update_inode(dir, o_res->dir_attr);
729 } else
730 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 731 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 732 status = _nfs4_proc_open_confirm(data);
1da177e4 733 if (status != 0)
24ac23ab 734 return status;
1da177e4 735 }
24ac23ab 736 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1da177e4 737 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
24ac23ab
TM		 738 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
739 return 0;
1da177e4
LT		 740}
741
742static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
743{
744 struct nfs_access_entry cache;
745 int mask = 0;
746 int status;
747
748 if (openflags & FMODE_READ)
749 mask |= MAY_READ;
750 if (openflags & FMODE_WRITE)
751 mask |= MAY_WRITE;
752 status = nfs_access_get_cached(inode, cred, &cache);
753 if (status == 0)
754 goto out;
755
756 /* Be clever: ask server to check for all possible rights */
757 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
758 cache.cred = cred;
759 cache.jiffies = jiffies;
760 status = _nfs4_proc_access(inode, &cache);
761 if (status != 0)
762 return status;
763 nfs_access_add_cache(inode, &cache);
764out:
765 if ((cache.mask & mask) == mask)
766 return 0;
767 return -EACCES;
768}
769
58d9714a
TM		 770int nfs4_recover_expired_lease(struct nfs_server *server)
771{
772 struct nfs4_client *clp = server->nfs4_state;
773
774 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
775 nfs4_schedule_state_recovery(clp);
776 return nfs4_wait_clnt_recover(server->client, clp);
777}
778
1da177e4
LT		 779/*
780 * OPEN_EXPIRED:
781 * reclaim state on the server after a network partition.
782 * Assumes caller holds the appropriate lock
783 */
784static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
785{
1da177e4 786 struct inode *inode = state->inode;
1da177e4 787 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
e56e0b78 788 struct nfs4_opendata *opendata;
24ac23ab 789 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
864472e9 790 int ret;
1da177e4
LT		 791
792 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
864472e9
TM		 793 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
794 if (ret < 0)
795 return ret;
1da177e4
LT		 796 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
797 set_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9 798 return 0;
1da177e4 799 }
24ac23ab 800 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
e56e0b78 801 if (opendata == NULL)
864472e9
TM		 802 return -ENOMEM;
803 ret = nfs4_open_recover(opendata, state);
804 if (ret == -ESTALE) {
805 /* Invalidate the state owner so we don't ever use it again */
806 nfs4_drop_state_owner(sp);
807 d_drop(dentry);
1da177e4 808 }
e56e0b78 809 nfs4_opendata_free(opendata);
864472e9 810 return ret;
1da177e4
LT		 811}
812
202b50dc
TM		 813static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
814{
815 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
816 struct nfs4_exception exception = { };
817 int err;
818
819 do {
820 err = _nfs4_open_expired(sp, state, dentry);
821 if (err == -NFS4ERR_DELAY)
822 nfs4_handle_exception(server, err, &exception);
823 } while (exception.retry);
824 return err;
825}
826
1da177e4
LT		 827static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
828{
1da177e4 829 struct nfs_open_context *ctx;
864472e9 830 int ret;
1da177e4 831
864472e9
TM		 832 ctx = nfs4_state_find_open_context(state);
833 if (IS_ERR(ctx))
834 return PTR_ERR(ctx);
835 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
836 put_nfs_open_context(ctx);
837 return ret;
1da177e4
LT		 838}
839
840/*
24ac23ab 841 * Returns a referenced nfs4_state if there is an open delegation on the file
1da177e4
LT		 842 */
843static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
844{
845 struct nfs_delegation *delegation;
846 struct nfs_server *server = NFS_SERVER(inode);
847 struct nfs4_client *clp = server->nfs4_state;
848 struct nfs_inode *nfsi = NFS_I(inode);
849 struct nfs4_state_owner *sp = NULL;
850 struct nfs4_state *state = NULL;
851 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
852 int err;
853
b4454fe1
TM		 854 err = -ENOMEM;
855 if (!(sp = nfs4_get_state_owner(server, cred))) {
856 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
857 return err;
858 }
58d9714a
TM		 859 err = nfs4_recover_expired_lease(server);
860 if (err != 0)
b4454fe1 861 goto out_put_state_owner;
1da177e4
LT		 862 /* Protect against reboot recovery - NOTE ORDER! */
863 down_read(&clp->cl_sem);
864 /* Protect against delegation recall */
865 down_read(&nfsi->rwsem);
866 delegation = NFS_I(inode)->delegation;
867 err = -ENOENT;
868 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
869 goto out_err;
870 err = -ENOMEM;
1da177e4
LT		 871 state = nfs4_get_open_state(inode, sp);
872 if (state == NULL)
873 goto out_err;
874
875 err = -ENOENT;
876 if ((state->state & open_flags) == open_flags) {
877 spin_lock(&inode->i_lock);
e7616923 878 update_open_stateflags(state, open_flags);
1da177e4
LT		 879 spin_unlock(&inode->i_lock);
880 goto out_ok;
881 } else if (state->state != 0)
b4454fe1 882 goto out_put_open_state;
1da177e4
LT		 883
884 lock_kernel();
885 err = _nfs4_do_access(inode, cred, open_flags);
886 unlock_kernel();
887 if (err != 0)
b4454fe1 888 goto out_put_open_state;
1da177e4
LT		 889 set_bit(NFS_DELEGATED_STATE, &state->flags);
890 update_open_stateid(state, &delegation->stateid, open_flags);
891out_ok:
1da177e4
LT		 892 nfs4_put_state_owner(sp);
893 up_read(&nfsi->rwsem);
894 up_read(&clp->cl_sem);
1da177e4 895 *res = state;
b4454fe1
TM		 896 return 0;
897out_put_open_state:
898 nfs4_put_open_state(state);
1da177e4 899out_err:
1da177e4
LT		 900 up_read(&nfsi->rwsem);
901 up_read(&clp->cl_sem);
b8e5c4c2
TM		 902 if (err != -EACCES)
903 nfs_inode_return_delegation(inode);
b4454fe1
TM		 904out_put_state_owner:
905 nfs4_put_state_owner(sp);
1da177e4
LT		 906 return err;
907}
908
909static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
910{
911 struct nfs4_exception exception = { };
a162a6b8 912 struct nfs4_state *res = ERR_PTR(-EIO);
1da177e4
LT		 913 int err;
914
915 do {
916 err = _nfs4_open_delegated(inode, flags, cred, &res);
917 if (err == 0)
918 break;
919 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
920 err, &exception));
921 } while (exception.retry);
922 return res;
923}
924
925/*
24ac23ab 926 * Returns a referenced nfs4_state
1da177e4
LT		 927 */
928static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
929{
930 struct nfs4_state_owner *sp;
931 struct nfs4_state *state = NULL;
932 struct nfs_server *server = NFS_SERVER(dir);
933 struct nfs4_client *clp = server->nfs4_state;
e56e0b78 934 struct nfs4_opendata *opendata;
1da177e4 935 int status;
1da177e4
LT		 936
937 /* Protect against reboot recovery conflicts */
1da177e4
LT		 938 status = -ENOMEM;
939 if (!(sp = nfs4_get_state_owner(server, cred))) {
940 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
941 goto out_err;
942 }
58d9714a
TM		 943 status = nfs4_recover_expired_lease(server);
944 if (status != 0)
b4454fe1 945 goto err_put_state_owner;
58d9714a
TM		 946 down_read(&clp->cl_sem);
947 status = -ENOMEM;
e56e0b78
TM		 948 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
949 if (opendata == NULL)
950 goto err_put_state_owner;
1da177e4 951
24ac23ab 952 status = _nfs4_proc_open(opendata);
1da177e4 953 if (status != 0)
e56e0b78 954 goto err_opendata_free;
1da177e4
LT		 955
956 status = -ENOMEM;
24ac23ab
TM		 957 state = nfs4_opendata_to_nfs4_state(opendata);
958 if (state == NULL)
e56e0b78 959 goto err_opendata_free;
e56e0b78 960 if (opendata->o_res.delegation_type != 0)
24ac23ab 961 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
e56e0b78 962 nfs4_opendata_free(opendata);
1da177e4
LT		 963 nfs4_put_state_owner(sp);
964 up_read(&clp->cl_sem);
965 *res = state;
966 return 0;
e56e0b78
TM		 967err_opendata_free:
968 nfs4_opendata_free(opendata);
969err_put_state_owner:
970 nfs4_put_state_owner(sp);
1da177e4 971out_err:
1da177e4
LT		 972 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
973 up_read(&clp->cl_sem);
1da177e4
LT		 974 *res = NULL;
975 return status;
976}
977
978
979static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
980{
981 struct nfs4_exception exception = { };
982 struct nfs4_state *res;
983 int status;
984
985 do {
986 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
987 if (status == 0)
988 break;
989 /* NOTE: BAD_SEQID means the server and client disagree about the
990 * book-keeping w.r.t. state-changing operations
991 * (OPEN/CLOSE/LOCK/LOCKU...)
992 * It is actually a sign of a bug on the client or on the server.
993 *
994 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 995 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 996 * have unhashed the old state_owner for us, and that we can
997 * therefore safely retry using a new one. We should still warn
998 * the user though...
999 */
1000 if (status == -NFS4ERR_BAD_SEQID) {
1001 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1002 exception.retry = 1;
1003 continue;
1004 }
550f5747
TM		 1005 /*
1006 * BAD_STATEID on OPEN means that the server cancelled our
1007 * state before it received the OPEN_CONFIRM.
1008 * Recover by retrying the request as per the discussion
1009 * on Page 181 of RFC3530.
1010 */
1011 if (status == -NFS4ERR_BAD_STATEID) {
1012 exception.retry = 1;
1013 continue;
1014 }
1da177e4
LT		 1015 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1016 status, &exception));
1017 } while (exception.retry);
1018 return res;
1019}
1020
3e4f6290
TM		 1021static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1022 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1023{
3e4f6290 1024 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1025 struct nfs_setattrargs arg = {
3e4f6290 1026 .fh = NFS_FH(inode),
1da177e4
LT		 1027 .iap = sattr,
1028 .server = server,
1029 .bitmask = server->attr_bitmask,
1030 };
1031 struct nfs_setattrres res = {
1032 .fattr = fattr,
1033 .server = server,
1034 };
1035 struct rpc_message msg = {
1036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1037 .rpc_argp = &arg,
1038 .rpc_resp = &res,
1039 };
26e976a8 1040 unsigned long timestamp = jiffies;
65e4308d 1041 int status;
1da177e4 1042
0e574af1 1043 nfs_fattr_init(fattr);
1da177e4 1044
3e4f6290
TM		 1045 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1046 /* Use that stateid */
1047 } else if (state != NULL) {
1da177e4 1048 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1049 nfs4_copy_stateid(&arg.stateid, state, current->files);
1050 } else
1da177e4
LT		 1051 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1052
65e4308d 1053 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1054 if (status == 0 && state != NULL)
1055 renew_lease(server, timestamp);
65e4308d 1056 return status;
1da177e4
LT		 1057}
1058
3e4f6290
TM		 1059static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1060 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1061{
3e4f6290 1062 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1063 struct nfs4_exception exception = { };
1064 int err;
1065 do {
1066 err = nfs4_handle_exception(server,
3e4f6290 1067 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1068 &exception);
1069 } while (exception.retry);
1070 return err;
1071}
1072
1073struct nfs4_closedata {
1074 struct inode *inode;
1075 struct nfs4_state *state;
1076 struct nfs_closeargs arg;
1077 struct nfs_closeres res;
516a6af6 1078 struct nfs_fattr fattr;
26e976a8 1079 unsigned long timestamp;
1da177e4
LT		 1080};
1081
963d8fe5 1082static void nfs4_free_closedata(void *data)
9512135d 1083{
963d8fe5
TM		 1084 struct nfs4_closedata *calldata = data;
1085 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1086
1087 nfs4_put_open_state(calldata->state);
1088 nfs_free_seqid(calldata->arg.seqid);
9512135d 1089 nfs4_put_state_owner(sp);
9512135d
TM		 1090 kfree(calldata);
1091}
1092
963d8fe5 1093static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1094{
963d8fe5 1095 struct nfs4_closedata *calldata = data;
1da177e4 1096 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1097 struct nfs_server *server = NFS_SERVER(calldata->inode);
1098
4ce70ada
TM		 1099 if (RPC_ASSASSINATED(task))
1100 return;
1da177e4
LT		 1101 /* hmm. we are done with the inode, and in the process of freeing
1102 * the state_owner. we keep this around to process errors
1103 */
cee54fc9 1104 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1105 switch (task->tk_status) {
1106 case 0:
1107 memcpy(&state->stateid, &calldata->res.stateid,
1108 sizeof(state->stateid));
26e976a8 1109 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1110 break;
1111 case -NFS4ERR_STALE_STATEID:
1112 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1113 nfs4_schedule_state_recovery(server->nfs4_state);
1114 break;
1115 default:
1116 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1117 rpc_restart_call(task);
1118 return;
1119 }
1120 }
516a6af6 1121 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1122}
1123
4ce70ada 1124static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1125{
4ce70ada 1126 struct nfs4_closedata *calldata = data;
9512135d 1127 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1128 struct rpc_message msg = {
1129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1130 .rpc_argp = &calldata->arg,
1131 .rpc_resp = &calldata->res,
9512135d 1132 .rpc_cred = state->owner->so_cred,
1da177e4 1133 };
4cecb76f 1134 int mode = 0, old_mode;
9512135d 1135
963d8fe5 1136 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1137 return;
9512135d
TM		 1138 /* Recalculate the new open mode in case someone reopened the file
1139 * while we were waiting in line to be scheduled.
1140 */
4cecb76f
TM		 1141 spin_lock(&state->owner->so_lock);
1142 spin_lock(&calldata->inode->i_lock);
1143 mode = old_mode = state->state;
e7616923
TM		 1144 if (state->n_rdwr == 0) {
1145 if (state->n_rdonly == 0)
1146 mode &= ~FMODE_READ;
1147 if (state->n_wronly == 0)
1148 mode &= ~FMODE_WRITE;
1149 }
4cecb76f
TM		 1150 nfs4_state_set_mode_locked(state, mode);
1151 spin_unlock(&calldata->inode->i_lock);
1152 spin_unlock(&state->owner->so_lock);
1153 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
963d8fe5
TM		 1154 /* Note: exit _without_ calling nfs4_close_done */
1155 task->tk_action = NULL;
9512135d
TM		 1156 return;
1157 }
516a6af6 1158 nfs_fattr_init(calldata->res.fattr);
9512135d 1159 if (mode != 0)
1da177e4 1160 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d 1161 calldata->arg.open_flags = mode;
26e976a8 1162 calldata->timestamp = jiffies;
9512135d 1163 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1164}
1165
963d8fe5 1166static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1167 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1168 .rpc_call_done = nfs4_close_done,
1169 .rpc_release = nfs4_free_closedata,
1170};
1171
1da177e4
LT		 1172/*
1173 * It is possible for data to be read/written from a mem-mapped file
1174 * after the sys_close call (which hits the vfs layer as a flush).
1175 * This means that we can't safely call nfsv4 close on a file until
1176 * the inode is cleared. This in turn means that we are not good
1177 * NFSv4 citizens - we do not indicate to the server to update the file's
1178 * share state even when we are done with one of the three share
1179 * stateid's in the inode.
1180 *
1181 * NOTE: Caller must be holding the sp->so_owner semaphore!
1182 */
4cecb76f 1183int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1da177e4 1184{
516a6af6 1185 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1186 struct nfs4_closedata *calldata;
9512135d 1187 int status = -ENOMEM;
1da177e4 1188
9512135d 1189 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1190 if (calldata == NULL)
9512135d 1191 goto out;
1da177e4
LT		 1192 calldata->inode = inode;
1193 calldata->state = state;
1194 calldata->arg.fh = NFS_FH(inode);
9512135d 1195 calldata->arg.stateid = &state->stateid;
1da177e4 1196 /* Serialization for the sequence id */
cee54fc9 1197 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1198 if (calldata->arg.seqid == NULL)
1199 goto out_free_calldata;
516a6af6
TM		 1200 calldata->arg.bitmask = server->attr_bitmask;
1201 calldata->res.fattr = &calldata->fattr;
1202 calldata->res.server = server;
9512135d 1203
4ce70ada 1204 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
9512135d
TM		 1205 if (status == 0)
1206 goto out;
1207
1208 nfs_free_seqid(calldata->arg.seqid);
1209out_free_calldata:
1210 kfree(calldata);
1211out:
1212 return status;
1da177e4
LT		 1213}
1214
02a913a7
TM		 1215static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
1216{
1217 struct file *filp;
1218
1219 filp = lookup_instantiate_filp(nd, dentry, NULL);
1220 if (!IS_ERR(filp)) {
1221 struct nfs_open_context *ctx;
1222 ctx = (struct nfs_open_context *)filp->private_data;
1223 ctx->state = state;
1224 } else
1225 nfs4_close_state(state, nd->intent.open.flags);
1226}
1227
1228struct dentry *
1da177e4
LT		 1229nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1230{
1231 struct iattr attr;
1232 struct rpc_cred *cred;
1233 struct nfs4_state *state;
02a913a7 1234 struct dentry *res;
1da177e4
LT		 1235
1236 if (nd->flags & LOOKUP_CREATE) {
1237 attr.ia_mode = nd->intent.open.create_mode;
1238 attr.ia_valid = ATTR_MODE;
1239 if (!IS_POSIXACL(dir))
1240 attr.ia_mode &= ~current->fs->umask;
1241 } else {
1242 attr.ia_valid = 0;
1243 BUG_ON(nd->intent.open.flags & O_CREAT);
1244 }
1245
1246 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1247 if (IS_ERR(cred))
02a913a7 1248 return (struct dentry *)cred;
1da177e4
LT		 1249 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1250 put_rpccred(cred);
02a913a7
TM		 1251 if (IS_ERR(state)) {
1252 if (PTR_ERR(state) == -ENOENT)
1253 d_add(dentry, NULL);
1254 return (struct dentry *)state;
1255 }
24ac23ab 1256 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM		 1257 if (res != NULL)
1258 dentry = res;
1259 nfs4_intent_set_file(nd, dentry, state);
1260 return res;
1da177e4
LT		 1261}
1262
1263int
02a913a7 1264nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4
LT		 1265{
1266 struct rpc_cred *cred;
1267 struct nfs4_state *state;
1da177e4
LT		 1268
1269 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1270 if (IS_ERR(cred))
1271 return PTR_ERR(cred);
1272 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1273 if (IS_ERR(state))
1274 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1275 put_rpccred(cred);
02a913a7
TM		 1276 if (IS_ERR(state)) {
1277 switch (PTR_ERR(state)) {
1278 case -EPERM:
1279 case -EACCES:
1280 case -EDQUOT:
1281 case -ENOSPC:
1282 case -EROFS:
1283 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1284 return 1;
1285 case -ENOENT:
1286 if (dentry->d_inode == NULL)
1287 return 1;
1288 }
1289 goto out_drop;
1290 }
24ac23ab 1291 if (state->inode == dentry->d_inode) {
02a913a7 1292 nfs4_intent_set_file(nd, dentry, state);
1da177e4
LT		 1293 return 1;
1294 }
1da177e4 1295 nfs4_close_state(state, openflags);
02a913a7
TM		 1296out_drop:
1297 d_drop(dentry);
1da177e4
LT		 1298 return 0;
1299}
1300
1301
1302static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1303{
1304 struct nfs4_server_caps_res res = {};
1305 struct rpc_message msg = {
1306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1307 .rpc_argp = fhandle,
1308 .rpc_resp = &res,
1309 };
1310 int status;
1311
1312 status = rpc_call_sync(server->client, &msg, 0);
1313 if (status == 0) {
1314 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1315 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1316 server->caps |= NFS_CAP_ACLS;
1317 if (res.has_links != 0)
1318 server->caps |= NFS_CAP_HARDLINKS;
1319 if (res.has_symlinks != 0)
1320 server->caps |= NFS_CAP_SYMLINKS;
1321 server->acl_bitmask = res.acl_bitmask;
1322 }
1323 return status;
1324}
1325
1326static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1327{
1328 struct nfs4_exception exception = { };
1329 int err;
1330 do {
1331 err = nfs4_handle_exception(server,
1332 _nfs4_server_capabilities(server, fhandle),
1333 &exception);
1334 } while (exception.retry);
1335 return err;
1336}
1337
1338static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1339 struct nfs_fsinfo *info)
1340{
1da177e4
LT		 1341 struct nfs4_lookup_root_arg args = {
1342 .bitmask = nfs4_fattr_bitmap,
1343 };
1344 struct nfs4_lookup_res res = {
1345 .server = server,
0e574af1 1346 .fattr = info->fattr,
1da177e4
LT		 1347 .fh = fhandle,
1348 };
1349 struct rpc_message msg = {
1350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1351 .rpc_argp = &args,
1352 .rpc_resp = &res,
1353 };
0e574af1 1354 nfs_fattr_init(info->fattr);
1da177e4
LT		 1355 return rpc_call_sync(server->client, &msg, 0);
1356}
1357
1358static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1359 struct nfs_fsinfo *info)
1360{
1361 struct nfs4_exception exception = { };
1362 int err;
1363 do {
1364 err = nfs4_handle_exception(server,
1365 _nfs4_lookup_root(server, fhandle, info),
1366 &exception);
1367 } while (exception.retry);
1368 return err;
1369}
1370
1371static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1372 struct nfs_fsinfo *info)
1373{
1374 struct nfs_fattr * fattr = info->fattr;
1375 unsigned char * p;
1376 struct qstr q;
1377 struct nfs4_lookup_arg args = {
1378 .dir_fh = fhandle,
1379 .name = &q,
1380 .bitmask = nfs4_fattr_bitmap,
1381 };
1382 struct nfs4_lookup_res res = {
1383 .server = server,
1384 .fattr = fattr,
1385 .fh = fhandle,
1386 };
1387 struct rpc_message msg = {
1388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1389 .rpc_argp = &args,
1390 .rpc_resp = &res,
1391 };
1392 int status;
1393
1394 /*
1395 * Now we do a separate LOOKUP for each component of the mount path.
1396 * The LOOKUPs are done separately so that we can conveniently
1397 * catch an ERR_WRONGSEC if it occurs along the way...
1398 */
1399 status = nfs4_lookup_root(server, fhandle, info);
1400 if (status)
1401 goto out;
1402
1403 p = server->mnt_path;
1404 for (;;) {
1405 struct nfs4_exception exception = { };
1406
1407 while (*p == '/')
1408 p++;
1409 if (!*p)
1410 break;
1411 q.name = p;
1412 while (*p && (*p != '/'))
1413 p++;
1414 q.len = p - q.name;
1415
1416 do {
0e574af1 1417 nfs_fattr_init(fattr);
1da177e4
LT		 1418 status = nfs4_handle_exception(server,
1419 rpc_call_sync(server->client, &msg, 0),
1420 &exception);
1421 } while (exception.retry);
1422 if (status == 0)
1423 continue;
1424 if (status == -ENOENT) {
1425 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1426 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1427 }
1428 break;
1429 }
1430 if (status == 0)
1431 status = nfs4_server_capabilities(server, fhandle);
1432 if (status == 0)
1433 status = nfs4_do_fsinfo(server, fhandle, info);
1434out:
c12e87f4 1435 return nfs4_map_errors(status);
1da177e4
LT		 1436}
1437
1438static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1439{
1440 struct nfs4_getattr_arg args = {
1441 .fh = fhandle,
1442 .bitmask = server->attr_bitmask,
1443 };
1444 struct nfs4_getattr_res res = {
1445 .fattr = fattr,
1446 .server = server,
1447 };
1448 struct rpc_message msg = {
1449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1450 .rpc_argp = &args,
1451 .rpc_resp = &res,
1452 };
1453
0e574af1 1454 nfs_fattr_init(fattr);
1da177e4
LT		 1455 return rpc_call_sync(server->client, &msg, 0);
1456}
1457
1458static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1459{
1460 struct nfs4_exception exception = { };
1461 int err;
1462 do {
1463 err = nfs4_handle_exception(server,
1464 _nfs4_proc_getattr(server, fhandle, fattr),
1465 &exception);
1466 } while (exception.retry);
1467 return err;
1468}
1469
1470/*
1471 * The file is not closed if it is opened due to the a request to change
1472 * the size of the file. The open call will not be needed once the
1473 * VFS layer lookup-intents are implemented.
1474 *
1475 * Close is called when the inode is destroyed.
1476 * If we haven't opened the file for O_WRONLY, we
1477 * need to in the size_change case to obtain a stateid.
1478 *
1479 * Got race?
1480 * Because OPEN is always done by name in nfsv4, it is
1481 * possible that we opened a different file by the same
1482 * name. We can recognize this race condition, but we
1483 * can't do anything about it besides returning an error.
1484 *
1485 * This will be fixed with VFS changes (lookup-intent).
1486 */
1487static int
1488nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1489 struct iattr *sattr)
1490{
08e9eac4
TM		 1491 struct rpc_cred *cred;
1492 struct inode *inode = dentry->d_inode;
d530838b
TM		 1493 struct nfs_open_context *ctx;
1494 struct nfs4_state *state = NULL;
1da177e4
LT		 1495 int status;
1496
0e574af1 1497 nfs_fattr_init(fattr);
1da177e4 1498
08e9eac4
TM		 1499 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1500 if (IS_ERR(cred))
1501 return PTR_ERR(cred);
d530838b
TM		 1502
1503 /* Search for an existing open(O_WRITE) file */
1504 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1505 if (ctx != NULL)
1506 state = ctx->state;
08e9eac4 1507
3e4f6290 1508 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1509 if (status == 0)
1510 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1511 if (ctx != NULL)
1512 put_nfs_open_context(ctx);
08e9eac4 1513 put_rpccred(cred);
1da177e4
LT		 1514 return status;
1515}
1516
1517static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1518 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1519{
1520 int status;
1521 struct nfs_server *server = NFS_SERVER(dir);
1522 struct nfs4_lookup_arg args = {
1523 .bitmask = server->attr_bitmask,
1524 .dir_fh = NFS_FH(dir),
1525 .name = name,
1526 };
1527 struct nfs4_lookup_res res = {
1528 .server = server,
1529 .fattr = fattr,
1530 .fh = fhandle,
1531 };
1532 struct rpc_message msg = {
1533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1534 .rpc_argp = &args,
1535 .rpc_resp = &res,
1536 };
1537
0e574af1 1538 nfs_fattr_init(fattr);
1da177e4
LT		 1539
1540 dprintk("NFS call lookup %s\n", name->name);
1541 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1542 dprintk("NFS reply lookup: %d\n", status);
1543 return status;
1544}
1545
1546static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1547{
1548 struct nfs4_exception exception = { };
1549 int err;
1550 do {
1551 err = nfs4_handle_exception(NFS_SERVER(dir),
1552 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1553 &exception);
1554 } while (exception.retry);
1555 return err;
1556}
1557
1558static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1559{
1560 struct nfs4_accessargs args = {
1561 .fh = NFS_FH(inode),
1562 };
1563 struct nfs4_accessres res = { 0 };
1564 struct rpc_message msg = {
1565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1566 .rpc_argp = &args,
1567 .rpc_resp = &res,
1568 .rpc_cred = entry->cred,
1569 };
1570 int mode = entry->mask;
1571 int status;
1572
1573 /*
1574 * Determine which access bits we want to ask for...
1575 */
1576 if (mode & MAY_READ)
1577 args.access |= NFS4_ACCESS_READ;
1578 if (S_ISDIR(inode->i_mode)) {
1579 if (mode & MAY_WRITE)
1580 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1581 if (mode & MAY_EXEC)
1582 args.access |= NFS4_ACCESS_LOOKUP;
1583 } else {
1584 if (mode & MAY_WRITE)
1585 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1586 if (mode & MAY_EXEC)
1587 args.access |= NFS4_ACCESS_EXECUTE;
1588 }
1589 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1590 if (!status) {
1591 entry->mask = 0;
1592 if (res.access & NFS4_ACCESS_READ)
1593 entry->mask |= MAY_READ;
1594 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1595 entry->mask |= MAY_WRITE;
1596 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1597 entry->mask |= MAY_EXEC;
1598 }
1599 return status;
1600}
1601
1602static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1603{
1604 struct nfs4_exception exception = { };
1605 int err;
1606 do {
1607 err = nfs4_handle_exception(NFS_SERVER(inode),
1608 _nfs4_proc_access(inode, entry),
1609 &exception);
1610 } while (exception.retry);
1611 return err;
1612}
1613
1614/*
1615 * TODO: For the time being, we don't try to get any attributes
1616 * along with any of the zero-copy operations READ, READDIR,
1617 * READLINK, WRITE.
1618 *
1619 * In the case of the first three, we want to put the GETATTR
1620 * after the read-type operation -- this is because it is hard
1621 * to predict the length of a GETATTR response in v4, and thus
1622 * align the READ data correctly. This means that the GETATTR
1623 * may end up partially falling into the page cache, and we should
1624 * shift it into the 'tail' of the xdr_buf before processing.
1625 * To do this efficiently, we need to know the total length
1626 * of data received, which doesn't seem to be available outside
1627 * of the RPC layer.
1628 *
1629 * In the case of WRITE, we also want to put the GETATTR after
1630 * the operation -- in this case because we want to make sure
1631 * we get the post-operation mtime and size. This means that
1632 * we can't use xdr_encode_pages() as written: we need a variant
1633 * of it which would leave room in the 'tail' iovec.
1634 *
1635 * Both of these changes to the XDR layer would in fact be quite
1636 * minor, but I decided to leave them for a subsequent patch.
1637 */
1638static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1639 unsigned int pgbase, unsigned int pglen)
1640{
1641 struct nfs4_readlink args = {
1642 .fh = NFS_FH(inode),
1643 .pgbase = pgbase,
1644 .pglen = pglen,
1645 .pages = &page,
1646 };
1647 struct rpc_message msg = {
1648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1649 .rpc_argp = &args,
1650 .rpc_resp = NULL,
1651 };
1652
1653 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1654}
1655
1656static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1657 unsigned int pgbase, unsigned int pglen)
1658{
1659 struct nfs4_exception exception = { };
1660 int err;
1661 do {
1662 err = nfs4_handle_exception(NFS_SERVER(inode),
1663 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1664 &exception);
1665 } while (exception.retry);
1666 return err;
1667}
1668
1669static int _nfs4_proc_read(struct nfs_read_data *rdata)
1670{
1671 int flags = rdata->flags;
1672 struct inode *inode = rdata->inode;
1673 struct nfs_fattr *fattr = rdata->res.fattr;
1674 struct nfs_server *server = NFS_SERVER(inode);
1675 struct rpc_message msg = {
1676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1677 .rpc_argp = &rdata->args,
1678 .rpc_resp = &rdata->res,
1679 .rpc_cred = rdata->cred,
1680 };
1681 unsigned long timestamp = jiffies;
1682 int status;
1683
1684 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1685 (long long) rdata->args.offset);
1686
0e574af1 1687 nfs_fattr_init(fattr);
1da177e4
LT		 1688 status = rpc_call_sync(server->client, &msg, flags);
1689 if (!status)
1690 renew_lease(server, timestamp);
1691 dprintk("NFS reply read: %d\n", status);
1692 return status;
1693}
1694
1695static int nfs4_proc_read(struct nfs_read_data *rdata)
1696{
1697 struct nfs4_exception exception = { };
1698 int err;
1699 do {
1700 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1701 _nfs4_proc_read(rdata),
1702 &exception);
1703 } while (exception.retry);
1704 return err;
1705}
1706
1707static int _nfs4_proc_write(struct nfs_write_data *wdata)
1708{
1709 int rpcflags = wdata->flags;
1710 struct inode *inode = wdata->inode;
1711 struct nfs_fattr *fattr = wdata->res.fattr;
1712 struct nfs_server *server = NFS_SERVER(inode);
1713 struct rpc_message msg = {
1714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1715 .rpc_argp = &wdata->args,
1716 .rpc_resp = &wdata->res,
1717 .rpc_cred = wdata->cred,
1718 };
1719 int status;
1720
1721 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1722 (long long) wdata->args.offset);
1723
3b6efee9
TM		 1724 wdata->args.bitmask = server->attr_bitmask;
1725 wdata->res.server = server;
26e976a8 1726 wdata->timestamp = jiffies;
0e574af1 1727 nfs_fattr_init(fattr);
1da177e4
LT		 1728 status = rpc_call_sync(server->client, &msg, rpcflags);
1729 dprintk("NFS reply write: %d\n", status);
3b6efee9
TM		 1730 if (status < 0)
1731 return status;
26e976a8 1732 renew_lease(server, wdata->timestamp);
3b6efee9
TM		 1733 nfs_post_op_update_inode(inode, fattr);
1734 return wdata->res.count;
1da177e4
LT		 1735}
1736
1737static int nfs4_proc_write(struct nfs_write_data *wdata)
1738{
1739 struct nfs4_exception exception = { };
1740 int err;
1741 do {
1742 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1743 _nfs4_proc_write(wdata),
1744 &exception);
1745 } while (exception.retry);
1746 return err;
1747}
1748
1749static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1750{
1751 struct inode *inode = cdata->inode;
1752 struct nfs_fattr *fattr = cdata->res.fattr;
1753 struct nfs_server *server = NFS_SERVER(inode);
1754 struct rpc_message msg = {
1755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1756 .rpc_argp = &cdata->args,
1757 .rpc_resp = &cdata->res,
1758 .rpc_cred = cdata->cred,
1759 };
1760 int status;
1761
1762 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1763 (long long) cdata->args.offset);
1764
3b6efee9
TM		 1765 cdata->args.bitmask = server->attr_bitmask;
1766 cdata->res.server = server;
26e976a8 1767 cdata->timestamp = jiffies;
0e574af1 1768 nfs_fattr_init(fattr);
1da177e4 1769 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1770 if (status >= 0)
1771 renew_lease(server, cdata->timestamp);
1da177e4 1772 dprintk("NFS reply commit: %d\n", status);
3b6efee9
TM		 1773 if (status >= 0)
1774 nfs_post_op_update_inode(inode, fattr);
1da177e4
LT		 1775 return status;
1776}
1777
1778static int nfs4_proc_commit(struct nfs_write_data *cdata)
1779{
1780 struct nfs4_exception exception = { };
1781 int err;
1782 do {
1783 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1784 _nfs4_proc_commit(cdata),
1785 &exception);
1786 } while (exception.retry);
1787 return err;
1788}
1789
1790/*
1791 * Got race?
1792 * We will need to arrange for the VFS layer to provide an atomic open.
1793 * Until then, this create/open method is prone to inefficiency and race
1794 * conditions due to the lookup, create, and open VFS calls from sys_open()
1795 * placed on the wire.
1796 *
1797 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1798 * The file will be opened again in the subsequent VFS open call
1799 * (nfs4_proc_file_open).
1800 *
1801 * The open for read will just hang around to be used by any process that
1802 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1803 */
1804
1805static int
1806nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1807 int flags, struct nameidata *nd)
1da177e4
LT		 1808{
1809 struct nfs4_state *state;
1810 struct rpc_cred *cred;
1811 int status = 0;
1812
1813 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1814 if (IS_ERR(cred)) {
1815 status = PTR_ERR(cred);
1816 goto out;
1817 }
1818 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1819 put_rpccred(cred);
1820 if (IS_ERR(state)) {
1821 status = PTR_ERR(state);
1822 goto out;
1823 }
24ac23ab 1824 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1825 if (flags & O_EXCL) {
1826 struct nfs_fattr fattr;
3e4f6290 1827 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1828 if (status == 0)
65e4308d 1829 nfs_setattr_update_inode(state->inode, sattr);
02a913a7
TM		 1830 }
1831 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
1832 nfs4_intent_set_file(nd, dentry, state);
1833 else
1834 nfs4_close_state(state, flags);
1da177e4
LT		 1835out:
1836 return status;
1837}
1838
1839static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1840{
16e42959 1841 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 1842 struct nfs4_remove_arg args = {
1843 .fh = NFS_FH(dir),
1844 .name = name,
16e42959
TM		 1845 .bitmask = server->attr_bitmask,
1846 };
1847 struct nfs_fattr dir_attr;
1848 struct nfs4_remove_res res = {
1849 .server = server,
1850 .dir_attr = &dir_attr,
1da177e4 1851 };
1da177e4
LT		 1852 struct rpc_message msg = {
1853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1854 .rpc_argp = &args,
1855 .rpc_resp = &res,
1856 };
1857 int status;
1858
16e42959
TM		 1859 nfs_fattr_init(res.dir_attr);
1860 status = rpc_call_sync(server->client, &msg, 0);
1861 if (status == 0) {
1862 update_changeattr(dir, &res.cinfo);
1863 nfs_post_op_update_inode(dir, res.dir_attr);
1864 }
1da177e4
LT		 1865 return status;
1866}
1867
1868static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1869{
1870 struct nfs4_exception exception = { };
1871 int err;
1872 do {
1873 err = nfs4_handle_exception(NFS_SERVER(dir),
1874 _nfs4_proc_remove(dir, name),
1875 &exception);
1876 } while (exception.retry);
1877 return err;
1878}
1879
1880struct unlink_desc {
1881 struct nfs4_remove_arg args;
16e42959
TM		 1882 struct nfs4_remove_res res;
1883 struct nfs_fattr dir_attr;
1da177e4
LT		 1884};
1885
1886static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1887 struct qstr *name)
1888{
16e42959 1889 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1da177e4
LT		 1890 struct unlink_desc *up;
1891
1892 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1893 if (!up)
1894 return -ENOMEM;
1895
1896 up->args.fh = NFS_FH(dir->d_inode);
1897 up->args.name = name;
16e42959
TM		 1898 up->args.bitmask = server->attr_bitmask;
1899 up->res.server = server;
1900 up->res.dir_attr = &up->dir_attr;
1da177e4
LT		 1901
1902 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1903 msg->rpc_argp = &up->args;
1904 msg->rpc_resp = &up->res;
1905 return 0;
1906}
1907
1908static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1909{
1910 struct rpc_message *msg = &task->tk_msg;
1911 struct unlink_desc *up;
1912
1913 if (msg->rpc_resp != NULL) {
1914 up = container_of(msg->rpc_resp, struct unlink_desc, res);
16e42959
TM		 1915 update_changeattr(dir->d_inode, &up->res.cinfo);
1916 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1da177e4
LT		 1917 kfree(up);
1918 msg->rpc_resp = NULL;
1919 msg->rpc_argp = NULL;
1920 }
1921 return 0;
1922}
1923
1924static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1925 struct inode *new_dir, struct qstr *new_name)
1926{
6caf2c82 1927 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1928 struct nfs4_rename_arg arg = {
1929 .old_dir = NFS_FH(old_dir),
1930 .new_dir = NFS_FH(new_dir),
1931 .old_name = old_name,
1932 .new_name = new_name,
6caf2c82
TM		 1933 .bitmask = server->attr_bitmask,
1934 };
1935 struct nfs_fattr old_fattr, new_fattr;
1936 struct nfs4_rename_res res = {
1937 .server = server,
1938 .old_fattr = &old_fattr,
1939 .new_fattr = &new_fattr,
1da177e4 1940 };
1da177e4
LT		 1941 struct rpc_message msg = {
1942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1943 .rpc_argp = &arg,
1944 .rpc_resp = &res,
1945 };
1946 int status;
1947
6caf2c82
TM		 1948 nfs_fattr_init(res.old_fattr);
1949 nfs_fattr_init(res.new_fattr);
1950 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 1951
1952 if (!status) {
1953 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 1954 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 1955 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 1956 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 1957 }
1958 return status;
1959}
1960
1961static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1962 struct inode *new_dir, struct qstr *new_name)
1963{
1964 struct nfs4_exception exception = { };
1965 int err;
1966 do {
1967 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1968 _nfs4_proc_rename(old_dir, old_name,
1969 new_dir, new_name),
1970 &exception);
1971 } while (exception.retry);
1972 return err;
1973}
1974
1975static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1976{
91ba2eee 1977 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1978 struct nfs4_link_arg arg = {
1979 .fh = NFS_FH(inode),
1980 .dir_fh = NFS_FH(dir),
1981 .name = name,
91ba2eee
TM		 1982 .bitmask = server->attr_bitmask,
1983 };
1984 struct nfs_fattr fattr, dir_attr;
1985 struct nfs4_link_res res = {
1986 .server = server,
1987 .fattr = &fattr,
1988 .dir_attr = &dir_attr,
1da177e4 1989 };
1da177e4
LT		 1990 struct rpc_message msg = {
1991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1992 .rpc_argp = &arg,
91ba2eee 1993 .rpc_resp = &res,
1da177e4
LT		 1994 };
1995 int status;
1996
91ba2eee
TM		 1997 nfs_fattr_init(res.fattr);
1998 nfs_fattr_init(res.dir_attr);
1999 status = rpc_call_sync(server->client, &msg, 0);
2000 if (!status) {
2001 update_changeattr(dir, &res.cinfo);
2002 nfs_post_op_update_inode(dir, res.dir_attr);
2003 nfs_refresh_inode(inode, res.fattr);
2004 }
1da177e4
LT		 2005
2006 return status;
2007}
2008
2009static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2010{
2011 struct nfs4_exception exception = { };
2012 int err;
2013 do {
2014 err = nfs4_handle_exception(NFS_SERVER(inode),
2015 _nfs4_proc_link(inode, dir, name),
2016 &exception);
2017 } while (exception.retry);
2018 return err;
2019}
2020
2021static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2022 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2023 struct nfs_fattr *fattr)
2024{
2025 struct nfs_server *server = NFS_SERVER(dir);
56ae19f3 2026 struct nfs_fattr dir_fattr;
1da177e4
LT		 2027 struct nfs4_create_arg arg = {
2028 .dir_fh = NFS_FH(dir),
2029 .server = server,
2030 .name = name,
2031 .attrs = sattr,
2032 .ftype = NF4LNK,
2033 .bitmask = server->attr_bitmask,
2034 };
2035 struct nfs4_create_res res = {
2036 .server = server,
2037 .fh = fhandle,
2038 .fattr = fattr,
56ae19f3 2039 .dir_fattr = &dir_fattr,
1da177e4
LT		 2040 };
2041 struct rpc_message msg = {
2042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2043 .rpc_argp = &arg,
2044 .rpc_resp = &res,
2045 };
2046 int status;
2047
2048 if (path->len > NFS4_MAXPATHLEN)
2049 return -ENAMETOOLONG;
2050 arg.u.symlink = path;
0e574af1 2051 nfs_fattr_init(fattr);
56ae19f3 2052 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2053
2054 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2055 if (!status)
2056 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2057 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2058 return status;
2059}
2060
2061static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2062 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2063 struct nfs_fattr *fattr)
2064{
2065 struct nfs4_exception exception = { };
2066 int err;
2067 do {
2068 err = nfs4_handle_exception(NFS_SERVER(dir),
2069 _nfs4_proc_symlink(dir, name, path, sattr,
2070 fhandle, fattr),
2071 &exception);
2072 } while (exception.retry);
2073 return err;
2074}
2075
2076static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2077 struct iattr *sattr)
2078{
2079 struct nfs_server *server = NFS_SERVER(dir);
2080 struct nfs_fh fhandle;
56ae19f3 2081 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2082 struct nfs4_create_arg arg = {
2083 .dir_fh = NFS_FH(dir),
2084 .server = server,
2085 .name = &dentry->d_name,
2086 .attrs = sattr,
2087 .ftype = NF4DIR,
2088 .bitmask = server->attr_bitmask,
2089 };
2090 struct nfs4_create_res res = {
2091 .server = server,
2092 .fh = &fhandle,
2093 .fattr = &fattr,
56ae19f3 2094 .dir_fattr = &dir_fattr,
1da177e4
LT		 2095 };
2096 struct rpc_message msg = {
2097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2098 .rpc_argp = &arg,
2099 .rpc_resp = &res,
2100 };
2101 int status;
2102
0e574af1 2103 nfs_fattr_init(&fattr);
56ae19f3 2104 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2105
2106 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2107 if (!status) {
2108 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2109 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2110 status = nfs_instantiate(dentry, &fhandle, &fattr);
2111 }
2112 return status;
2113}
2114
2115static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2116 struct iattr *sattr)
2117{
2118 struct nfs4_exception exception = { };
2119 int err;
2120 do {
2121 err = nfs4_handle_exception(NFS_SERVER(dir),
2122 _nfs4_proc_mkdir(dir, dentry, sattr),
2123 &exception);
2124 } while (exception.retry);
2125 return err;
2126}
2127
2128static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2129 u64 cookie, struct page *page, unsigned int count, int plus)
2130{
2131 struct inode *dir = dentry->d_inode;
2132 struct nfs4_readdir_arg args = {
2133 .fh = NFS_FH(dir),
2134 .pages = &page,
2135 .pgbase = 0,
2136 .count = count,
2137 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2138 };
2139 struct nfs4_readdir_res res;
2140 struct rpc_message msg = {
2141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2142 .rpc_argp = &args,
2143 .rpc_resp = &res,
2144 .rpc_cred = cred,
2145 };
2146 int status;
2147
eadf4598
TM		 2148 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2149 dentry->d_parent->d_name.name,
2150 dentry->d_name.name,
2151 (unsigned long long)cookie);
1da177e4
LT		 2152 lock_kernel();
2153 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2154 res.pgbase = args.pgbase;
2155 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2156 if (status == 0)
2157 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2158 unlock_kernel();
eadf4598 2159 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2160 return status;
2161}
2162
2163static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2164 u64 cookie, struct page *page, unsigned int count, int plus)
2165{
2166 struct nfs4_exception exception = { };
2167 int err;
2168 do {
2169 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2170 _nfs4_proc_readdir(dentry, cred, cookie,
2171 page, count, plus),
2172 &exception);
2173 } while (exception.retry);
2174 return err;
2175}
2176
2177static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2178 struct iattr *sattr, dev_t rdev)
2179{
2180 struct nfs_server *server = NFS_SERVER(dir);
2181 struct nfs_fh fh;
56ae19f3 2182 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2183 struct nfs4_create_arg arg = {
2184 .dir_fh = NFS_FH(dir),
2185 .server = server,
2186 .name = &dentry->d_name,
2187 .attrs = sattr,
2188 .bitmask = server->attr_bitmask,
2189 };
2190 struct nfs4_create_res res = {
2191 .server = server,
2192 .fh = &fh,
2193 .fattr = &fattr,
56ae19f3 2194 .dir_fattr = &dir_fattr,
1da177e4
LT		 2195 };
2196 struct rpc_message msg = {
2197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2198 .rpc_argp = &arg,
2199 .rpc_resp = &res,
2200 };
2201 int status;
2202 int mode = sattr->ia_mode;
2203
0e574af1 2204 nfs_fattr_init(&fattr);
56ae19f3 2205 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2206
2207 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2208 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2209 if (S_ISFIFO(mode))
2210 arg.ftype = NF4FIFO;
2211 else if (S_ISBLK(mode)) {
2212 arg.ftype = NF4BLK;
2213 arg.u.device.specdata1 = MAJOR(rdev);
2214 arg.u.device.specdata2 = MINOR(rdev);
2215 }
2216 else if (S_ISCHR(mode)) {
2217 arg.ftype = NF4CHR;
2218 arg.u.device.specdata1 = MAJOR(rdev);
2219 arg.u.device.specdata2 = MINOR(rdev);
2220 }
2221 else
2222 arg.ftype = NF4SOCK;
2223
2224 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2225 if (status == 0) {
2226 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2227 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2228 status = nfs_instantiate(dentry, &fh, &fattr);
2229 }
2230 return status;
2231}
2232
2233static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2234 struct iattr *sattr, dev_t rdev)
2235{
2236 struct nfs4_exception exception = { };
2237 int err;
2238 do {
2239 err = nfs4_handle_exception(NFS_SERVER(dir),
2240 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2241 &exception);
2242 } while (exception.retry);
2243 return err;
2244}
2245
2246static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2247 struct nfs_fsstat *fsstat)
2248{
2249 struct nfs4_statfs_arg args = {
2250 .fh = fhandle,
2251 .bitmask = server->attr_bitmask,
2252 };
2253 struct rpc_message msg = {
2254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2255 .rpc_argp = &args,
2256 .rpc_resp = fsstat,
2257 };
2258
0e574af1 2259 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2260 return rpc_call_sync(server->client, &msg, 0);
2261}
2262
2263static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2264{
2265 struct nfs4_exception exception = { };
2266 int err;
2267 do {
2268 err = nfs4_handle_exception(server,
2269 _nfs4_proc_statfs(server, fhandle, fsstat),
2270 &exception);
2271 } while (exception.retry);
2272 return err;
2273}
2274
2275static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2276 struct nfs_fsinfo *fsinfo)
2277{
2278 struct nfs4_fsinfo_arg args = {
2279 .fh = fhandle,
2280 .bitmask = server->attr_bitmask,
2281 };
2282 struct rpc_message msg = {
2283 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2284 .rpc_argp = &args,
2285 .rpc_resp = fsinfo,
2286 };
2287
2288 return rpc_call_sync(server->client, &msg, 0);
2289}
2290
2291static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2292{
2293 struct nfs4_exception exception = { };
2294 int err;
2295
2296 do {
2297 err = nfs4_handle_exception(server,
2298 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2299 &exception);
2300 } while (exception.retry);
2301 return err;
2302}
2303
2304static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2305{
0e574af1 2306 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2307 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2308}
2309
2310static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2311 struct nfs_pathconf *pathconf)
2312{
2313 struct nfs4_pathconf_arg args = {
2314 .fh = fhandle,
2315 .bitmask = server->attr_bitmask,
2316 };
2317 struct rpc_message msg = {
2318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2319 .rpc_argp = &args,
2320 .rpc_resp = pathconf,
2321 };
2322
2323 /* None of the pathconf attributes are mandatory to implement */
2324 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2325 memset(pathconf, 0, sizeof(*pathconf));
2326 return 0;
2327 }
2328
0e574af1 2329 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2330 return rpc_call_sync(server->client, &msg, 0);
2331}
2332
2333static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2334 struct nfs_pathconf *pathconf)
2335{
2336 struct nfs4_exception exception = { };
2337 int err;
2338
2339 do {
2340 err = nfs4_handle_exception(server,
2341 _nfs4_proc_pathconf(server, fhandle, pathconf),
2342 &exception);
2343 } while (exception.retry);
2344 return err;
2345}
2346
ec06c096 2347static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2348{
ec06c096 2349 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2350
ec06c096 2351 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2352 rpc_restart_call(task);
ec06c096 2353 return -EAGAIN;
1da177e4
LT		 2354 }
2355 if (task->tk_status > 0)
ec06c096
TM		 2356 renew_lease(server, data->timestamp);
2357 return 0;
1da177e4
LT		 2358}
2359
ec06c096 2360static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2361{
1da177e4
LT		 2362 struct rpc_message msg = {
2363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2364 .rpc_argp = &data->args,
2365 .rpc_resp = &data->res,
2366 .rpc_cred = data->cred,
2367 };
1da177e4
LT		 2368
2369 data->timestamp = jiffies;
2370
ec06c096 2371 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2372}
2373
788e7a89 2374static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2375{
1da177e4
LT		 2376 struct inode *inode = data->inode;
2377
2378 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2379 rpc_restart_call(task);
788e7a89 2380 return -EAGAIN;
1da177e4 2381 }
4f9838c7 2382 if (task->tk_status >= 0) {
1da177e4 2383 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2384 nfs_post_op_update_inode(inode, data->res.fattr);
2385 }
788e7a89 2386 return 0;
1da177e4
LT		 2387}
2388
788e7a89 2389static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2390{
1da177e4
LT		 2391 struct rpc_message msg = {
2392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2393 .rpc_argp = &data->args,
2394 .rpc_resp = &data->res,
2395 .rpc_cred = data->cred,
2396 };
2397 struct inode *inode = data->inode;
4f9838c7 2398 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2399 int stable;
1da177e4
LT		 2400
2401 if (how & FLUSH_STABLE) {
2402 if (!NFS_I(inode)->ncommit)
2403 stable = NFS_FILE_SYNC;
2404 else
2405 stable = NFS_DATA_SYNC;
2406 } else
2407 stable = NFS_UNSTABLE;
2408 data->args.stable = stable;
4f9838c7
TM		 2409 data->args.bitmask = server->attr_bitmask;
2410 data->res.server = server;
1da177e4
LT		 2411
2412 data->timestamp = jiffies;
2413
1da177e4 2414 /* Finalize the task. */
788e7a89 2415 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2416}
2417
788e7a89 2418static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2419{
1da177e4
LT		 2420 struct inode *inode = data->inode;
2421
2422 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2423 rpc_restart_call(task);
788e7a89 2424 return -EAGAIN;
1da177e4 2425 }
4f9838c7
TM		 2426 if (task->tk_status >= 0)
2427 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2428 return 0;
1da177e4
LT		 2429}
2430
788e7a89 2431static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2432{
1da177e4
LT		 2433 struct rpc_message msg = {
2434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2435 .rpc_argp = &data->args,
2436 .rpc_resp = &data->res,
2437 .rpc_cred = data->cred,
2438 };
788e7a89 2439 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2440
4f9838c7
TM		 2441 data->args.bitmask = server->attr_bitmask;
2442 data->res.server = server;
2443
788e7a89 2444 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2445}
2446
2447/*
2448 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2449 * standalone procedure for queueing an asynchronous RENEW.
2450 */
963d8fe5 2451static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4
LT		 2452{
2453 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
963d8fe5 2454 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2455
2456 if (task->tk_status < 0) {
2457 switch (task->tk_status) {
2458 case -NFS4ERR_STALE_CLIENTID:
2459 case -NFS4ERR_EXPIRED:
2460 case -NFS4ERR_CB_PATH_DOWN:
2461 nfs4_schedule_state_recovery(clp);
2462 }
2463 return;
2464 }
2465 spin_lock(&clp->cl_lock);
2466 if (time_before(clp->cl_last_renewal,timestamp))
2467 clp->cl_last_renewal = timestamp;
2468 spin_unlock(&clp->cl_lock);
2469}
2470
963d8fe5
TM		 2471static const struct rpc_call_ops nfs4_renew_ops = {
2472 .rpc_call_done = nfs4_renew_done,
2473};
2474
b4454fe1 2475int nfs4_proc_async_renew(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2476{
2477 struct rpc_message msg = {
2478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2479 .rpc_argp = clp,
b4454fe1 2480 .rpc_cred = cred,
1da177e4
LT		 2481 };
2482
2483 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2484 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2485}
2486
b4454fe1 2487int nfs4_proc_renew(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2488{
2489 struct rpc_message msg = {
2490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2491 .rpc_argp = clp,
b4454fe1 2492 .rpc_cred = cred,
1da177e4
LT		 2493 };
2494 unsigned long now = jiffies;
2495 int status;
2496
2497 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2498 if (status < 0)
2499 return status;
2500 spin_lock(&clp->cl_lock);
2501 if (time_before(clp->cl_last_renewal,now))
2502 clp->cl_last_renewal = now;
2503 spin_unlock(&clp->cl_lock);
2504 return 0;
2505}
2506
aa1870af
BF		 2507static inline int nfs4_server_supports_acls(struct nfs_server *server)
2508{
2509 return (server->caps & NFS_CAP_ACLS)
2510 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2511 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2512}
2513
2514/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2515 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2516 * the stack.
2517 */
2518#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2519
2520static void buf_to_pages(const void *buf, size_t buflen,
2521 struct page **pages, unsigned int *pgbase)
2522{
2523 const void *p = buf;
2524
2525 *pgbase = offset_in_page(buf);
2526 p -= *pgbase;
2527 while (p < buf + buflen) {
2528 *(pages++) = virt_to_page(p);
2529 p += PAGE_CACHE_SIZE;
2530 }
2531}
2532
e50a1c2e
BF		 2533struct nfs4_cached_acl {
2534 int cached;
2535 size_t len;
3e9d4154 2536 char data[0];
e50a1c2e
BF		 2537};
2538
2539static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2540{
2541 struct nfs_inode *nfsi = NFS_I(inode);
2542
2543 spin_lock(&inode->i_lock);
2544 kfree(nfsi->nfs4_acl);
2545 nfsi->nfs4_acl = acl;
2546 spin_unlock(&inode->i_lock);
2547}
2548
2549static void nfs4_zap_acl_attr(struct inode *inode)
2550{
2551 nfs4_set_cached_acl(inode, NULL);
2552}
2553
2554static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2555{
2556 struct nfs_inode *nfsi = NFS_I(inode);
2557 struct nfs4_cached_acl *acl;
2558 int ret = -ENOENT;
2559
2560 spin_lock(&inode->i_lock);
2561 acl = nfsi->nfs4_acl;
2562 if (acl == NULL)
2563 goto out;
2564 if (buf == NULL) /* user is just asking for length */
2565 goto out_len;
2566 if (acl->cached == 0)
2567 goto out;
2568 ret = -ERANGE; /* see getxattr(2) man page */
2569 if (acl->len > buflen)
2570 goto out;
2571 memcpy(buf, acl->data, acl->len);
2572out_len:
2573 ret = acl->len;
2574out:
2575 spin_unlock(&inode->i_lock);
2576 return ret;
2577}
2578
2579static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2580{
2581 struct nfs4_cached_acl *acl;
2582
2583 if (buf && acl_len <= PAGE_SIZE) {
2584 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2585 if (acl == NULL)
2586 goto out;
2587 acl->cached = 1;
2588 memcpy(acl->data, buf, acl_len);
2589 } else {
2590 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2591 if (acl == NULL)
2592 goto out;
2593 acl->cached = 0;
2594 }
2595 acl->len = acl_len;
2596out:
2597 nfs4_set_cached_acl(inode, acl);
2598}
2599
2600static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2601{
aa1870af
BF		 2602 struct page *pages[NFS4ACL_MAXPAGES];
2603 struct nfs_getaclargs args = {
2604 .fh = NFS_FH(inode),
2605 .acl_pages = pages,
2606 .acl_len = buflen,
2607 };
2608 size_t resp_len = buflen;
e50a1c2e 2609 void *resp_buf;
aa1870af
BF		 2610 struct rpc_message msg = {
2611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2612 .rpc_argp = &args,
2613 .rpc_resp = &resp_len,
2614 };
e50a1c2e 2615 struct page *localpage = NULL;
aa1870af
BF		 2616 int ret;
2617
e50a1c2e
BF		 2618 if (buflen < PAGE_SIZE) {
2619 /* As long as we're doing a round trip to the server anyway,
2620 * let's be prepared for a page of acl data. */
2621 localpage = alloc_page(GFP_KERNEL);
2622 resp_buf = page_address(localpage);
2623 if (localpage == NULL)
2624 return -ENOMEM;
2625 args.acl_pages[0] = localpage;
2626 args.acl_pgbase = 0;
1d95db8e 2627 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2628 } else {
2629 resp_buf = buf;
2630 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2631 }
aa1870af 2632 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2633 if (ret)
2634 goto out_free;
2635 if (resp_len > args.acl_len)
2636 nfs4_write_cached_acl(inode, NULL, resp_len);
2637 else
2638 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2639 if (buf) {
2640 ret = -ERANGE;
2641 if (resp_len > buflen)
2642 goto out_free;
2643 if (localpage)
2644 memcpy(buf, resp_buf, resp_len);
2645 }
2646 ret = resp_len;
2647out_free:
2648 if (localpage)
2649 __free_page(localpage);
aa1870af
BF		 2650 return ret;
2651}
2652
e50a1c2e
BF		 2653static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2654{
2655 struct nfs_server *server = NFS_SERVER(inode);
2656 int ret;
2657
2658 if (!nfs4_server_supports_acls(server))
2659 return -EOPNOTSUPP;
2660 ret = nfs_revalidate_inode(server, inode);
2661 if (ret < 0)
2662 return ret;
2663 ret = nfs4_read_cached_acl(inode, buf, buflen);
2664 if (ret != -ENOENT)
2665 return ret;
2666 return nfs4_get_acl_uncached(inode, buf, buflen);
2667}
2668
4b580ee3
BF		 2669static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2670{
2671 struct nfs_server *server = NFS_SERVER(inode);
2672 struct page *pages[NFS4ACL_MAXPAGES];
2673 struct nfs_setaclargs arg = {
2674 .fh = NFS_FH(inode),
2675 .acl_pages = pages,
2676 .acl_len = buflen,
2677 };
2678 struct rpc_message msg = {
2679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2680 .rpc_argp = &arg,
2681 .rpc_resp = NULL,
2682 };
2683 int ret;
2684
2685 if (!nfs4_server_supports_acls(server))
2686 return -EOPNOTSUPP;
642ac549 2687 nfs_inode_return_delegation(inode);
4b580ee3
BF		 2688 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2689 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
e50a1c2e
BF		 2690 if (ret == 0)
2691 nfs4_write_cached_acl(inode, buf, buflen);
4b580ee3
BF		 2692 return ret;
2693}
2694
1da177e4 2695static int
faf5f49c 2696nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4
LT		 2697{
2698 struct nfs4_client *clp = server->nfs4_state;
2699
2700 if (!clp || task->tk_status >= 0)
2701 return 0;
2702 switch(task->tk_status) {
2703 case -NFS4ERR_STALE_CLIENTID:
2704 case -NFS4ERR_STALE_STATEID:
2705 case -NFS4ERR_EXPIRED:
2706 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2707 nfs4_schedule_state_recovery(clp);
433fbe4c 2708 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2709 rpc_wake_up_task(task);
2710 task->tk_status = 0;
2711 return -EAGAIN;
1da177e4 2712 case -NFS4ERR_DELAY:
006ea73e
CL		 2713 nfs_inc_server_stats((struct nfs_server *) server,
2714 NFSIOS_DELAY);
2715 case -NFS4ERR_GRACE:
1da177e4
LT		 2716 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2717 task->tk_status = 0;
2718 return -EAGAIN;
2719 case -NFS4ERR_OLD_STATEID:
2720 task->tk_status = 0;
2721 return -EAGAIN;
2722 }
2723 task->tk_status = nfs4_map_errors(task->tk_status);
2724 return 0;
2725}
2726
433fbe4c
TM		 2727static int nfs4_wait_bit_interruptible(void *word)
2728{
2729 if (signal_pending(current))
2730 return -ERESTARTSYS;
2731 schedule();
2732 return 0;
2733}
2734
1da177e4
LT		 2735static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2736{
1da177e4 2737 sigset_t oldset;
433fbe4c 2738 int res;
1da177e4
LT		 2739
2740 might_sleep();
2741
2742 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2743 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2744 nfs4_wait_bit_interruptible,
2745 TASK_INTERRUPTIBLE);
1da177e4
LT		 2746 rpc_clnt_sigunmask(clnt, &oldset);
2747 return res;
2748}
2749
2750static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2751{
2752 sigset_t oldset;
2753 int res = 0;
2754
2755 might_sleep();
2756
2757 if (*timeout <= 0)
2758 *timeout = NFS4_POLL_RETRY_MIN;
2759 if (*timeout > NFS4_POLL_RETRY_MAX)
2760 *timeout = NFS4_POLL_RETRY_MAX;
2761 rpc_clnt_sigmask(clnt, &oldset);
2762 if (clnt->cl_intr) {
041e0e3b 2763 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2764 if (signalled())
2765 res = -ERESTARTSYS;
041e0e3b
NA		 2766 } else
2767 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2768 rpc_clnt_sigunmask(clnt, &oldset);
2769 *timeout <<= 1;
2770 return res;
2771}
2772
2773/* This is the error handling routine for processes that are allowed
2774 * to sleep.
2775 */
faf5f49c 2776int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4
LT		 2777{
2778 struct nfs4_client *clp = server->nfs4_state;
2779 int ret = errorcode;
2780
2781 exception->retry = 0;
2782 switch(errorcode) {
2783 case 0:
2784 return 0;
2785 case -NFS4ERR_STALE_CLIENTID:
2786 case -NFS4ERR_STALE_STATEID:
2787 case -NFS4ERR_EXPIRED:
433fbe4c 2788 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2789 ret = nfs4_wait_clnt_recover(server->client, clp);
2790 if (ret == 0)
2791 exception->retry = 1;
2792 break;
2793 case -NFS4ERR_GRACE:
2794 case -NFS4ERR_DELAY:
2795 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2796 if (ret != 0)
2797 break;
1da177e4 2798 case -NFS4ERR_OLD_STATEID:
2c56617d 2799 exception->retry = 1;
1da177e4
LT		 2800 }
2801 /* We failed to handle the error */
2802 return nfs4_map_errors(ret);
2803}
2804
286d7d6a 2805int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2806{
2807 nfs4_verifier sc_verifier;
2808 struct nfs4_setclientid setclientid = {
2809 .sc_verifier = &sc_verifier,
2810 .sc_prog = program,
2811 };
2812 struct rpc_message msg = {
2813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2814 .rpc_argp = &setclientid,
2815 .rpc_resp = clp,
286d7d6a 2816 .rpc_cred = cred,
1da177e4
LT		 2817 };
2818 u32 *p;
2819 int loop = 0;
2820 int status;
2821
2822 p = (u32*)sc_verifier.data;
2823 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2824 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2825
2826 for(;;) {
2827 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2828 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2829 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
286d7d6a 2830 cred->cr_ops->cr_name,
1da177e4
LT		 2831 clp->cl_id_uniquifier);
2832 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2833 sizeof(setclientid.sc_netid), "tcp");
2834 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2835 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2836 clp->cl_ipaddr, port >> 8, port & 255);
2837
2838 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2839 if (status != -NFS4ERR_CLID_INUSE)
2840 break;
2841 if (signalled())
2842 break;
2843 if (loop++ & 1)
2844 ssleep(clp->cl_lease_time + 1);
2845 else
2846 if (++clp->cl_id_uniquifier == 0)
2847 break;
2848 }
2849 return status;
2850}
2851
51581f3b 2852static int _nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2853{
2854 struct nfs_fsinfo fsinfo;
2855 struct rpc_message msg = {
2856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2857 .rpc_argp = clp,
2858 .rpc_resp = &fsinfo,
286d7d6a 2859 .rpc_cred = cred,
1da177e4
LT		 2860 };
2861 unsigned long now;
2862 int status;
2863
2864 now = jiffies;
2865 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2866 if (status == 0) {
2867 spin_lock(&clp->cl_lock);
2868 clp->cl_lease_time = fsinfo.lease_time * HZ;
2869 clp->cl_last_renewal = now;
58d9714a 2870 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2871 spin_unlock(&clp->cl_lock);
2872 }
2873 return status;
2874}
2875
51581f3b
TM		 2876int nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
2877{
2878 long timeout;
2879 int err;
2880 do {
2881 err = _nfs4_proc_setclientid_confirm(clp, cred);
2882 switch (err) {
2883 case 0:
2884 return err;
2885 case -NFS4ERR_RESOURCE:
2886 /* The IBM lawyers misread another document! */
2887 case -NFS4ERR_DELAY:
2888 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2889 }
2890 } while (err == 0);
2891 return err;
2892}
2893
fe650407
TM		 2894struct nfs4_delegreturndata {
2895 struct nfs4_delegreturnargs args;
fa178f29 2896 struct nfs4_delegreturnres res;
fe650407
TM		 2897 struct nfs_fh fh;
2898 nfs4_stateid stateid;
2899 struct rpc_cred *cred;
26e976a8 2900 unsigned long timestamp;
fa178f29 2901 struct nfs_fattr fattr;
fe650407
TM		 2902 int rpc_status;
2903};
2904
2905static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2906{
fe650407 2907 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 2908 struct rpc_message msg = {
2909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 2910 .rpc_argp = &data->args,
fa178f29 2911 .rpc_resp = &data->res,
fe650407 2912 .rpc_cred = data->cred,
1da177e4 2913 };
fa178f29 2914 nfs_fattr_init(data->res.fattr);
fe650407
TM		 2915 rpc_call_setup(task, &msg, 0);
2916}
1da177e4 2917
fe650407
TM		 2918static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2919{
2920 struct nfs4_delegreturndata *data = calldata;
2921 data->rpc_status = task->tk_status;
26e976a8 2922 if (data->rpc_status == 0)
fa178f29 2923 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2924}
2925
2926static void nfs4_delegreturn_release(void *calldata)
2927{
2928 struct nfs4_delegreturndata *data = calldata;
2929
2930 put_rpccred(data->cred);
2931 kfree(calldata);
2932}
2933
c8d149f3 2934static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2935 .rpc_call_prepare = nfs4_delegreturn_prepare,
2936 .rpc_call_done = nfs4_delegreturn_done,
2937 .rpc_release = nfs4_delegreturn_release,
2938};
2939
2940static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2941{
2942 struct nfs4_delegreturndata *data;
fa178f29 2943 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 2944 struct rpc_task *task;
2945 int status;
2946
2947 data = kmalloc(sizeof(*data), GFP_KERNEL);
2948 if (data == NULL)
2949 return -ENOMEM;
2950 data->args.fhandle = &data->fh;
2951 data->args.stateid = &data->stateid;
fa178f29 2952 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 2953 nfs_copy_fh(&data->fh, NFS_FH(inode));
2954 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 2955 data->res.fattr = &data->fattr;
2956 data->res.server = server;
fe650407 2957 data->cred = get_rpccred(cred);
26e976a8 2958 data->timestamp = jiffies;
fe650407
TM		 2959 data->rpc_status = 0;
2960
2961 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
2962 if (IS_ERR(task)) {
2963 nfs4_delegreturn_release(data);
2964 return PTR_ERR(task);
2965 }
2966 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 2967 if (status == 0) {
fe650407 2968 status = data->rpc_status;
fa178f29
TM		 2969 if (status == 0)
2970 nfs_post_op_update_inode(inode, &data->fattr);
2971 }
fe650407
TM		 2972 rpc_release_task(task);
2973 return status;
1da177e4
LT		 2974}
2975
2976int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2977{
2978 struct nfs_server *server = NFS_SERVER(inode);
2979 struct nfs4_exception exception = { };
2980 int err;
2981 do {
2982 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2983 switch (err) {
2984 case -NFS4ERR_STALE_STATEID:
2985 case -NFS4ERR_EXPIRED:
2986 nfs4_schedule_state_recovery(server->nfs4_state);
2987 case 0:
2988 return 0;
2989 }
2990 err = nfs4_handle_exception(server, err, &exception);
2991 } while (exception.retry);
2992 return err;
2993}
2994
2995#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2996#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2997
2998/*
2999 * sleep, with exponential backoff, and retry the LOCK operation.
3000 */
3001static unsigned long
3002nfs4_set_lock_task_retry(unsigned long timeout)
3003{
041e0e3b 3004 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3005 timeout <<= 1;
3006 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3007 return NFS4_LOCK_MAXTIMEOUT;
3008 return timeout;
3009}
3010
1da177e4
LT		 3011static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3012{
3013 struct inode *inode = state->inode;
3014 struct nfs_server *server = NFS_SERVER(inode);
3015 struct nfs4_client *clp = server->nfs4_state;
911d1aaf 3016 struct nfs_lockt_args arg = {
1da177e4 3017 .fh = NFS_FH(inode),
911d1aaf 3018 .fl = request,
1da177e4 3019 };
911d1aaf
TM		 3020 struct nfs_lockt_res res = {
3021 .denied = request,
1da177e4
LT		 3022 };
3023 struct rpc_message msg = {
3024 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3025 .rpc_argp = &arg,
3026 .rpc_resp = &res,
3027 .rpc_cred = state->owner->so_cred,
3028 };
1da177e4
LT		 3029 struct nfs4_lock_state *lsp;
3030 int status;
3031
3032 down_read(&clp->cl_sem);
911d1aaf 3033 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3034 status = nfs4_set_lock_state(state, request);
3035 if (status != 0)
3036 goto out;
3037 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3038 arg.lock_owner.id = lsp->ls_id;
1da177e4 3039 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3040 switch (status) {
3041 case 0:
3042 request->fl_type = F_UNLCK;
3043 break;
3044 case -NFS4ERR_DENIED:
3045 status = 0;
1da177e4 3046 }
8d0a8a9d 3047out:
1da177e4
LT		 3048 up_read(&clp->cl_sem);
3049 return status;
3050}
3051
3052static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3053{
3054 struct nfs4_exception exception = { };
3055 int err;
3056
3057 do {
3058 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3059 _nfs4_proc_getlk(state, cmd, request),
3060 &exception);
3061 } while (exception.retry);
3062 return err;
3063}
3064
3065static int do_vfs_lock(struct file *file, struct file_lock *fl)
3066{
3067 int res = 0;
3068 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3069 case FL_POSIX:
3070 res = posix_lock_file_wait(file, fl);
3071 break;
3072 case FL_FLOCK:
3073 res = flock_lock_file_wait(file, fl);
3074 break;
3075 default:
3076 BUG();
3077 }
3078 if (res < 0)
3079 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
3080 __FUNCTION__);
3081 return res;
3082}
3083
faf5f49c 3084struct nfs4_unlockdata {
911d1aaf
TM		 3085 struct nfs_locku_args arg;
3086 struct nfs_locku_res res;
faf5f49c
TM		 3087 struct nfs4_lock_state *lsp;
3088 struct nfs_open_context *ctx;
911d1aaf
TM		 3089 struct file_lock fl;
3090 const struct nfs_server *server;
26e976a8 3091 unsigned long timestamp;
faf5f49c
TM		 3092};
3093
911d1aaf
TM		 3094static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3095 struct nfs_open_context *ctx,
3096 struct nfs4_lock_state *lsp,
3097 struct nfs_seqid *seqid)
3098{
3099 struct nfs4_unlockdata *p;
3100 struct inode *inode = lsp->ls_state->inode;
3101
3102 p = kmalloc(sizeof(*p), GFP_KERNEL);
3103 if (p == NULL)
3104 return NULL;
3105 p->arg.fh = NFS_FH(inode);
3106 p->arg.fl = &p->fl;
3107 p->arg.seqid = seqid;
3108 p->arg.stateid = &lsp->ls_stateid;
3109 p->lsp = lsp;
3110 atomic_inc(&lsp->ls_count);
3111 /* Ensure we don't close file until we're done freeing locks! */
3112 p->ctx = get_nfs_open_context(ctx);
3113 memcpy(&p->fl, fl, sizeof(p->fl));
3114 p->server = NFS_SERVER(inode);
3115 return p;
3116}
3117
06f814a3 3118static void nfs4_locku_release_calldata(void *data)
faf5f49c 3119{
963d8fe5 3120 struct nfs4_unlockdata *calldata = data;
911d1aaf 3121 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3122 nfs4_put_lock_state(calldata->lsp);
3123 put_nfs_open_context(calldata->ctx);
3124 kfree(calldata);
faf5f49c
TM		 3125}
3126
963d8fe5 3127static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3128{
963d8fe5 3129 struct nfs4_unlockdata *calldata = data;
faf5f49c 3130
06f814a3
TM		 3131 if (RPC_ASSASSINATED(task))
3132 return;
911d1aaf 3133 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3134 switch (task->tk_status) {
3135 case 0:
3136 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3137 calldata->res.stateid.data,
faf5f49c 3138 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3139 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3140 break;
3141 case -NFS4ERR_STALE_STATEID:
3142 case -NFS4ERR_EXPIRED:
911d1aaf 3143 nfs4_schedule_state_recovery(calldata->server->nfs4_state);
faf5f49c
TM		 3144 break;
3145 default:
911d1aaf 3146 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
faf5f49c 3147 rpc_restart_call(task);
faf5f49c
TM		 3148 }
3149 }
faf5f49c
TM		 3150}
3151
4ce70ada 3152static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3153{
4ce70ada 3154 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3155 struct rpc_message msg = {
3156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3157 .rpc_argp = &calldata->arg,
3158 .rpc_resp = &calldata->res,
3159 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3160 };
faf5f49c 3161
911d1aaf 3162 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3163 return;
3164 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3165 /* Note: exit _without_ running nfs4_locku_done */
3166 task->tk_action = NULL;
faf5f49c
TM		 3167 return;
3168 }
26e976a8 3169 calldata->timestamp = jiffies;
faf5f49c
TM		 3170 rpc_call_setup(task, &msg, 0);
3171}
3172
963d8fe5 3173static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3174 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3175 .rpc_call_done = nfs4_locku_done,
06f814a3 3176 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3177};
3178
a5d16a4d
TM		 3179static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3180 struct nfs_open_context *ctx,
3181 struct nfs4_lock_state *lsp,
3182 struct nfs_seqid *seqid)
3183{
3184 struct nfs4_unlockdata *data;
3185 struct rpc_task *task;
3186
3187 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3188 if (data == NULL) {
3189 nfs_free_seqid(seqid);
3190 return ERR_PTR(-ENOMEM);
3191 }
3192
3193 /* Unlock _before_ we do the RPC call */
3194 do_vfs_lock(fl->fl_file, fl);
3195 task = rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3196 if (IS_ERR(task))
3197 nfs4_locku_release_calldata(data);
3198 return task;
3199}
3200
faf5f49c
TM		 3201static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3202{
911d1aaf 3203 struct nfs_seqid *seqid;
1da177e4 3204 struct nfs4_lock_state *lsp;
06f814a3
TM		 3205 struct rpc_task *task;
3206 int status = 0;
faf5f49c 3207
6bfc93ef
TM		 3208 /* Is this a delegated lock? */
3209 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
911d1aaf
TM		 3210 goto out_unlock;
3211 /* Is this open_owner holding any locks on the server? */
3212 if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
3213 goto out_unlock;
6bfc93ef 3214
8d0a8a9d
TM		 3215 status = nfs4_set_lock_state(state, request);
3216 if (status != 0)
911d1aaf 3217 goto out_unlock;
8d0a8a9d 3218 lsp = request->fl_u.nfs4_fl.owner;
06f814a3 3219 status = -ENOMEM;
911d1aaf
TM		 3220 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3221 if (seqid == NULL)
3222 goto out_unlock;
a5d16a4d
TM		 3223 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3224 status = PTR_ERR(task);
3225 if (IS_ERR(task))
3226 goto out_unlock;
3227 status = nfs4_wait_for_completion_rpc_task(task);
3228 rpc_release_task(task);
911d1aaf 3229 return status;
911d1aaf 3230out_unlock:
faf5f49c 3231 do_vfs_lock(request->fl_file, request);
1da177e4
LT		 3232 return status;
3233}
3234
a5d16a4d
TM		 3235struct nfs4_lockdata {
3236 struct nfs_lock_args arg;
3237 struct nfs_lock_res res;
3238 struct nfs4_lock_state *lsp;
3239 struct nfs_open_context *ctx;
3240 struct file_lock fl;
26e976a8 3241 unsigned long timestamp;
a5d16a4d
TM		 3242 int rpc_status;
3243 int cancelled;
3244};
3245
3246static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3247 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3248{
a5d16a4d
TM		 3249 struct nfs4_lockdata *p;
3250 struct inode *inode = lsp->ls_state->inode;
1da177e4 3251 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3252
3253 p = kzalloc(sizeof(*p), GFP_KERNEL);
3254 if (p == NULL)
3255 return NULL;
3256
3257 p->arg.fh = NFS_FH(inode);
3258 p->arg.fl = &p->fl;
3259 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3260 if (p->arg.lock_seqid == NULL)
3261 goto out_free;
3262 p->arg.lock_stateid = &lsp->ls_stateid;
3263 p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
3264 p->arg.lock_owner.id = lsp->ls_id;
3265 p->lsp = lsp;
3266 atomic_inc(&lsp->ls_count);
3267 p->ctx = get_nfs_open_context(ctx);
3268 memcpy(&p->fl, fl, sizeof(p->fl));
3269 return p;
3270out_free:
3271 kfree(p);
3272 return NULL;
3273}
3274
3275static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3276{
3277 struct nfs4_lockdata *data = calldata;
3278 struct nfs4_state *state = data->lsp->ls_state;
3279 struct nfs4_state_owner *sp = state->owner;
1da177e4 3280 struct rpc_message msg = {
a5d16a4d
TM		 3281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3282 .rpc_argp = &data->arg,
3283 .rpc_resp = &data->res,
3284 .rpc_cred = sp->so_cred,
1da177e4 3285 };
06735b34 3286
a5d16a4d
TM		 3287 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3288 return;
3289 dprintk("%s: begin!\n", __FUNCTION__);
3290 /* Do we need to do an open_to_lock_owner? */
3291 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3292 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3293 if (data->arg.open_seqid == NULL) {
3294 data->rpc_status = -ENOMEM;
3295 task->tk_action = NULL;
06735b34 3296 goto out;
8d0a8a9d 3297 }
a5d16a4d
TM		 3298 data->arg.open_stateid = &state->stateid;
3299 data->arg.new_lock_owner = 1;
3300 }
26e976a8 3301 data->timestamp = jiffies;
a5d16a4d 3302 rpc_call_setup(task, &msg, 0);
06735b34 3303out:
a5d16a4d
TM		 3304 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3305}
3306
3307static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3308{
3309 struct nfs4_lockdata *data = calldata;
3310
3311 dprintk("%s: begin!\n", __FUNCTION__);
3312
3313 data->rpc_status = task->tk_status;
3314 if (RPC_ASSASSINATED(task))
3315 goto out;
3316 if (data->arg.new_lock_owner != 0) {
3317 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3318 if (data->rpc_status == 0)
3319 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3320 else
3321 goto out;
3322 }
3323 if (data->rpc_status == 0) {
3324 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3325 sizeof(data->lsp->ls_stateid.data));
3326 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
26e976a8 3327 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3328 }
3329 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3330out:
3331 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3332}
3333
3334static void nfs4_lock_release(void *calldata)
3335{
3336 struct nfs4_lockdata *data = calldata;
3337
3338 dprintk("%s: begin!\n", __FUNCTION__);
3339 if (data->arg.open_seqid != NULL)
3340 nfs_free_seqid(data->arg.open_seqid);
3341 if (data->cancelled != 0) {
3342 struct rpc_task *task;
3343 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3344 data->arg.lock_seqid);
3345 if (!IS_ERR(task))
3346 rpc_release_task(task);
3347 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3348 } else
3349 nfs_free_seqid(data->arg.lock_seqid);
3350 nfs4_put_lock_state(data->lsp);
3351 put_nfs_open_context(data->ctx);
3352 kfree(data);
3353 dprintk("%s: done!\n", __FUNCTION__);
3354}
3355
3356static const struct rpc_call_ops nfs4_lock_ops = {
3357 .rpc_call_prepare = nfs4_lock_prepare,
3358 .rpc_call_done = nfs4_lock_done,
3359 .rpc_release = nfs4_lock_release,
3360};
3361
3362static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3363{
3364 struct nfs4_lockdata *data;
3365 struct rpc_task *task;
3366 int ret;
3367
3368 dprintk("%s: begin!\n", __FUNCTION__);
3369 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3370 fl->fl_u.nfs4_fl.owner);
3371 if (data == NULL)
3372 return -ENOMEM;
3373 if (IS_SETLKW(cmd))
3374 data->arg.block = 1;
3375 if (reclaim != 0)
3376 data->arg.reclaim = 1;
3377 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3378 &nfs4_lock_ops, data);
3379 if (IS_ERR(task)) {
3380 nfs4_lock_release(data);
3381 return PTR_ERR(task);
3382 }
3383 ret = nfs4_wait_for_completion_rpc_task(task);
3384 if (ret == 0) {
3385 ret = data->rpc_status;
3386 if (ret == -NFS4ERR_DENIED)
3387 ret = -EAGAIN;
3388 } else
3389 data->cancelled = 1;
3390 rpc_release_task(task);
3391 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3392 return ret;
1da177e4
LT		 3393}
3394
3395static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3396{
202b50dc
TM		 3397 struct nfs_server *server = NFS_SERVER(state->inode);
3398 struct nfs4_exception exception = { };
3399 int err;
3400
6bfc93ef
TM		 3401 /* Cache the lock if possible... */
3402 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3403 return 0;
202b50dc
TM		 3404 do {
3405 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3406 if (err != -NFS4ERR_DELAY)
3407 break;
3408 nfs4_handle_exception(server, err, &exception);
3409 } while (exception.retry);
3410 return err;
1da177e4
LT		 3411}
3412
3413static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3414{
202b50dc
TM		 3415 struct nfs_server *server = NFS_SERVER(state->inode);
3416 struct nfs4_exception exception = { };
3417 int err;
3418
6bfc93ef
TM		 3419 err = nfs4_set_lock_state(state, request);
3420 if (err != 0)
3421 return err;
202b50dc
TM		 3422 do {
3423 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3424 if (err != -NFS4ERR_DELAY)
3425 break;
3426 nfs4_handle_exception(server, err, &exception);
3427 } while (exception.retry);
3428 return err;
1da177e4
LT		 3429}
3430
3431static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3432{
3433 struct nfs4_client *clp = state->owner->so_client;
3434 int status;
3435
6bfc93ef 3436 /* Is this a delegated open? */
ff604066 3437 if (NFS_I(state->inode)->delegation_state != 0) {
6bfc93ef
TM		 3438 /* Yes: cache locks! */
3439 status = do_vfs_lock(request->fl_file, request);
3440 /* ...but avoid races with delegation recall... */
3441 if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
ff604066 3442 return status;
1da177e4 3443 }
ff604066 3444 down_read(&clp->cl_sem);
6bfc93ef
TM		 3445 status = nfs4_set_lock_state(state, request);
3446 if (status != 0)
3447 goto out;
3448 status = _nfs4_do_setlk(state, cmd, request, 0);
3449 if (status != 0)
3450 goto out;
3451 /* Note: we always want to sleep here! */
3452 request->fl_flags |= FL_SLEEP;
3453 if (do_vfs_lock(request->fl_file, request) < 0)
3454 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3455out:
1da177e4
LT		 3456 up_read(&clp->cl_sem);
3457 return status;
3458}
3459
3460static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3461{
3462 struct nfs4_exception exception = { };
3463 int err;
3464
3465 do {
3466 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3467 _nfs4_proc_setlk(state, cmd, request),
3468 &exception);
3469 } while (exception.retry);
3470 return err;
3471}
3472
3473static int
3474nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3475{
3476 struct nfs_open_context *ctx;
3477 struct nfs4_state *state;
3478 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3479 int status;
3480
3481 /* verify open state */
3482 ctx = (struct nfs_open_context *)filp->private_data;
3483 state = ctx->state;
3484
3485 if (request->fl_start < 0 || request->fl_end < 0)
3486 return -EINVAL;
3487
3488 if (IS_GETLK(cmd))
3489 return nfs4_proc_getlk(state, F_GETLK, request);
3490
3491 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3492 return -EINVAL;
3493
3494 if (request->fl_type == F_UNLCK)
3495 return nfs4_proc_unlck(state, cmd, request);
3496
3497 do {
3498 status = nfs4_proc_setlk(state, cmd, request);
3499 if ((status != -EAGAIN) || IS_SETLK(cmd))
3500 break;
3501 timeout = nfs4_set_lock_task_retry(timeout);
3502 status = -ERESTARTSYS;
3503 if (signalled())
3504 break;
3505 } while(status < 0);
1da177e4
LT		 3506 return status;
3507}
3508
888e694c
TM		 3509int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3510{
3511 struct nfs_server *server = NFS_SERVER(state->inode);
3512 struct nfs4_exception exception = { };
3513 int err;
3514
3515 err = nfs4_set_lock_state(state, fl);
3516 if (err != 0)
3517 goto out;
3518 do {
3519 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3520 if (err != -NFS4ERR_DELAY)
3521 break;
3522 err = nfs4_handle_exception(server, err, &exception);
3523 } while (exception.retry);
3524out:
3525 return err;
3526}
6b3b5496 3527
aa1870af
BF		 3528#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3529
6b3b5496
BF		 3530int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3531 size_t buflen, int flags)
3532{
4b580ee3
BF		 3533 struct inode *inode = dentry->d_inode;
3534
3535 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3536 return -EOPNOTSUPP;
3537
3538 if (!S_ISREG(inode->i_mode) &&
3539 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3540 return -EPERM;
3541
3542 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3543}
3544
3545/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3546 * and that's what we'll do for e.g. user attributes that haven't been set.
3547 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3548 * attributes in kernel-managed attribute namespaces. */
3549ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3550 size_t buflen)
3551{
aa1870af
BF		 3552 struct inode *inode = dentry->d_inode;
3553
3554 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3555 return -EOPNOTSUPP;
3556
3557 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3558}
3559
3560ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3561{
aa1870af 3562 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496
BF		 3563
3564 if (buf && buflen < len)
3565 return -ERANGE;
3566 if (buf)
aa1870af
BF		 3567 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3568 return len;
6b3b5496
BF		 3569}
3570
1da177e4
LT		 3571struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3572 .recover_open = nfs4_open_reclaim,
3573 .recover_lock = nfs4_lock_reclaim,
3574};
3575
3576struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3577 .recover_open = nfs4_open_expired,
3578 .recover_lock = nfs4_lock_expired,
3579};
3580
6b3b5496
BF		 3581static struct inode_operations nfs4_file_inode_operations = {
3582 .permission = nfs_permission,
3583 .getattr = nfs_getattr,
3584 .setattr = nfs_setattr,
3585 .getxattr = nfs4_getxattr,
3586 .setxattr = nfs4_setxattr,
3587 .listxattr = nfs4_listxattr,
3588};
3589
1da177e4
LT		 3590struct nfs_rpc_ops nfs_v4_clientops = {
3591 .version = 4, /* protocol version */
3592 .dentry_ops = &nfs4_dentry_operations,
3593 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3594 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3595 .getroot = nfs4_proc_get_root,
3596 .getattr = nfs4_proc_getattr,
3597 .setattr = nfs4_proc_setattr,
3598 .lookup = nfs4_proc_lookup,
3599 .access = nfs4_proc_access,
3600 .readlink = nfs4_proc_readlink,
3601 .read = nfs4_proc_read,
3602 .write = nfs4_proc_write,
3603 .commit = nfs4_proc_commit,
3604 .create = nfs4_proc_create,
3605 .remove = nfs4_proc_remove,
3606 .unlink_setup = nfs4_proc_unlink_setup,
3607 .unlink_done = nfs4_proc_unlink_done,
3608 .rename = nfs4_proc_rename,
3609 .link = nfs4_proc_link,
3610 .symlink = nfs4_proc_symlink,
3611 .mkdir = nfs4_proc_mkdir,
3612 .rmdir = nfs4_proc_remove,
3613 .readdir = nfs4_proc_readdir,
3614 .mknod = nfs4_proc_mknod,
3615 .statfs = nfs4_proc_statfs,
3616 .fsinfo = nfs4_proc_fsinfo,
3617 .pathconf = nfs4_proc_pathconf,
3618 .decode_dirent = nfs4_decode_dirent,
3619 .read_setup = nfs4_proc_read_setup,
ec06c096 3620 .read_done = nfs4_read_done,
1da177e4 3621 .write_setup = nfs4_proc_write_setup,
788e7a89 3622 .write_done = nfs4_write_done,
1da177e4 3623 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3624 .commit_done = nfs4_commit_done,
02a913a7
TM		 3625 .file_open = nfs_open,
3626 .file_release = nfs_release,
1da177e4 3627 .lock = nfs4_proc_lock,
e50a1c2e 3628 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3629};
3630
3631/*
3632 * Local variables:
3633 * c-basic-offset: 8
3634 * End:
3635 */
kernel source for telekom puls (alcatel/mediatek)