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Subject: Re: [PATCH] Fix SUNRPC wakeup/execute race condition
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
006ea73e 54#include "iostat.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
2066fe89 58#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
cdd4e68b 61struct nfs4_opendata;
864472e9 62static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 63static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 64static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
1da177e4 65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
faf5f49c 66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
adfa6f98 67static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
1da177e4 68
1da177e4
LT		 69/* Prevent leaks of NFSv4 errors into userland */
70int nfs4_map_errors(int err)
71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
74 __FUNCTION__, -err);
75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
830b8e33
MN		 122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
bc4785cd 141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 142 struct nfs4_readdir_arg *readdir)
143{
0dbb4c67 144 __be32 *start, *p;
1da177e4
LT		 145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
b7ef1956 148 readdir->cookie = cookie;
1da177e4
LT		 149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
0dbb4c67 165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
26e976a8 196static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 197{
7539bbab 198 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 199 spin_lock(&clp->cl_lock);
200 if (time_before(clp->cl_last_renewal,timestamp))
201 clp->cl_last_renewal = timestamp;
202 spin_unlock(&clp->cl_lock);
203}
204
38478b24 205static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 206{
38478b24 207 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 208
38478b24
TM		 209 spin_lock(&dir->i_lock);
210 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
1da177e4
LT		 211 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
212 nfsi->change_attr = cinfo->after;
38478b24 213 spin_unlock(&dir->i_lock);
1da177e4
LT		 214}
215
e56e0b78 216struct nfs4_opendata {
24ac23ab 217 atomic_t count;
e56e0b78
TM		 218 struct nfs_openargs o_arg;
219 struct nfs_openres o_res;
cdd4e68b
TM		 220 struct nfs_open_confirmargs c_arg;
221 struct nfs_open_confirmres c_res;
e56e0b78
TM		 222 struct nfs_fattr f_attr;
223 struct nfs_fattr dir_attr;
224 struct dentry *dentry;
225 struct dentry *dir;
226 struct nfs4_state_owner *owner;
227 struct iattr attrs;
26e976a8 228 unsigned long timestamp;
24ac23ab
TM		 229 int rpc_status;
230 int cancelled;
e56e0b78
TM		 231};
232
233static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
234 struct nfs4_state_owner *sp, int flags,
235 const struct iattr *attrs)
236{
237 struct dentry *parent = dget_parent(dentry);
238 struct inode *dir = parent->d_inode;
239 struct nfs_server *server = NFS_SERVER(dir);
240 struct nfs4_opendata *p;
241
242 p = kzalloc(sizeof(*p), GFP_KERNEL);
243 if (p == NULL)
244 goto err;
245 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
246 if (p->o_arg.seqid == NULL)
247 goto err_free;
24ac23ab 248 atomic_set(&p->count, 1);
e56e0b78
TM		 249 p->dentry = dget(dentry);
250 p->dir = parent;
251 p->owner = sp;
252 atomic_inc(&sp->so_count);
253 p->o_arg.fh = NFS_FH(dir);
254 p->o_arg.open_flags = flags,
7539bbab 255 p->o_arg.clientid = server->nfs_client->cl_clientid;
e56e0b78
TM		 256 p->o_arg.id = sp->so_id;
257 p->o_arg.name = &dentry->d_name;
258 p->o_arg.server = server;
259 p->o_arg.bitmask = server->attr_bitmask;
260 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
261 p->o_res.f_attr = &p->f_attr;
262 p->o_res.dir_attr = &p->dir_attr;
263 p->o_res.server = server;
264 nfs_fattr_init(&p->f_attr);
265 nfs_fattr_init(&p->dir_attr);
266 if (flags & O_EXCL) {
267 u32 *s = (u32 *) p->o_arg.u.verifier.data;
268 s[0] = jiffies;
269 s[1] = current->pid;
270 } else if (flags & O_CREAT) {
271 p->o_arg.u.attrs = &p->attrs;
272 memcpy(&p->attrs, attrs, sizeof(p->attrs));
273 }
cdd4e68b
TM		 274 p->c_arg.fh = &p->o_res.fh;
275 p->c_arg.stateid = &p->o_res.stateid;
276 p->c_arg.seqid = p->o_arg.seqid;
e56e0b78
TM		 277 return p;
278err_free:
279 kfree(p);
280err:
281 dput(parent);
282 return NULL;
283}
284
285static void nfs4_opendata_free(struct nfs4_opendata *p)
286{
24ac23ab 287 if (p != NULL && atomic_dec_and_test(&p->count)) {
e56e0b78
TM		 288 nfs_free_seqid(p->o_arg.seqid);
289 nfs4_put_state_owner(p->owner);
290 dput(p->dir);
291 dput(p->dentry);
292 kfree(p);
293 }
294}
295
9512135d 296/* Helper for asynchronous RPC calls */
4ce70ada 297static int nfs4_call_async(struct rpc_clnt *clnt,
963d8fe5 298 const struct rpc_call_ops *tk_ops, void *calldata)
9512135d
TM		 299{
300 struct rpc_task *task;
301
963d8fe5 302 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
9512135d 303 return -ENOMEM;
9512135d
TM		 304 rpc_execute(task);
305 return 0;
306}
307
06f814a3
TM		 308static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
309{
310 sigset_t oldset;
311 int ret;
312
313 rpc_clnt_sigmask(task->tk_client, &oldset);
314 ret = rpc_wait_for_completion_task(task);
315 rpc_clnt_sigunmask(task->tk_client, &oldset);
316 return ret;
317}
318
e7616923
TM		 319static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
320{
321 switch (open_flags) {
322 case FMODE_WRITE:
323 state->n_wronly++;
324 break;
325 case FMODE_READ:
326 state->n_rdonly++;
327 break;
328 case FMODE_READ|FMODE_WRITE:
329 state->n_rdwr++;
330 }
331}
332
1da177e4
LT		 333static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
334{
335 struct inode *inode = state->inode;
336
337 open_flags &= (FMODE_READ|FMODE_WRITE);
d530838b 338 /* Protect against nfs4_find_state_byowner() */
ec073428 339 spin_lock(&state->owner->so_lock);
1da177e4 340 spin_lock(&inode->i_lock);
4cecb76f 341 memcpy(&state->stateid, stateid, sizeof(state->stateid));
e7616923 342 update_open_stateflags(state, open_flags);
4cecb76f 343 nfs4_state_set_mode_locked(state, state->state | open_flags);
1da177e4 344 spin_unlock(&inode->i_lock);
ec073428 345 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 346}
347
24ac23ab
TM		 348static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
349{
350 struct inode *inode;
351 struct nfs4_state *state = NULL;
352
353 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
354 goto out;
355 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
03f28e3a 356 if (IS_ERR(inode))
24ac23ab
TM		 357 goto out;
358 state = nfs4_get_open_state(inode, data->owner);
359 if (state == NULL)
360 goto put_inode;
361 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
362put_inode:
363 iput(inode);
364out:
365 return state;
366}
367
864472e9
TM		 368static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
369{
370 struct nfs_inode *nfsi = NFS_I(state->inode);
371 struct nfs_open_context *ctx;
372
373 spin_lock(&state->inode->i_lock);
374 list_for_each_entry(ctx, &nfsi->open_files, list) {
375 if (ctx->state != state)
376 continue;
377 get_nfs_open_context(ctx);
378 spin_unlock(&state->inode->i_lock);
379 return ctx;
380 }
381 spin_unlock(&state->inode->i_lock);
382 return ERR_PTR(-ENOENT);
383}
384
385static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
386{
387 int ret;
388
389 opendata->o_arg.open_flags = openflags;
390 ret = _nfs4_proc_open(opendata);
391 if (ret != 0)
392 return ret;
393 memcpy(stateid->data, opendata->o_res.stateid.data,
394 sizeof(stateid->data));
395 return 0;
396}
397
398static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
399{
400 nfs4_stateid stateid;
401 struct nfs4_state *newstate;
402 int mode = 0;
403 int delegation = 0;
404 int ret;
405
406 /* memory barrier prior to reading state->n_* */
407 smp_rmb();
408 if (state->n_rdwr != 0) {
409 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
410 if (ret != 0)
411 return ret;
412 mode |= FMODE_READ|FMODE_WRITE;
413 if (opendata->o_res.delegation_type != 0)
414 delegation = opendata->o_res.delegation_type;
415 smp_rmb();
416 }
417 if (state->n_wronly != 0) {
418 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
419 if (ret != 0)
420 return ret;
421 mode |= FMODE_WRITE;
422 if (opendata->o_res.delegation_type != 0)
423 delegation = opendata->o_res.delegation_type;
424 smp_rmb();
425 }
426 if (state->n_rdonly != 0) {
427 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
428 if (ret != 0)
429 return ret;
430 mode |= FMODE_READ;
431 }
432 clear_bit(NFS_DELEGATED_STATE, &state->flags);
433 if (mode == 0)
434 return 0;
435 if (opendata->o_res.delegation_type == 0)
436 opendata->o_res.delegation_type = delegation;
437 opendata->o_arg.open_flags |= mode;
438 newstate = nfs4_opendata_to_nfs4_state(opendata);
439 if (newstate != NULL) {
440 if (opendata->o_res.delegation_type != 0) {
441 struct nfs_inode *nfsi = NFS_I(newstate->inode);
442 int delegation_flags = 0;
443 if (nfsi->delegation)
444 delegation_flags = nfsi->delegation->flags;
445 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
446 nfs_inode_set_delegation(newstate->inode,
447 opendata->owner->so_cred,
448 &opendata->o_res);
449 else
450 nfs_inode_reclaim_delegation(newstate->inode,
451 opendata->owner->so_cred,
452 &opendata->o_res);
453 }
454 nfs4_close_state(newstate, opendata->o_arg.open_flags);
455 }
456 if (newstate != state)
457 return -ESTALE;
458 return 0;
459}
460
1da177e4
LT		 461/*
462 * OPEN_RECLAIM:
463 * reclaim state on the server after a reboot.
1da177e4 464 */
864472e9 465static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4 466{
864472e9
TM		 467 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
468 struct nfs4_opendata *opendata;
469 int delegation_type = 0;
1da177e4
LT		 470 int status;
471
472 if (delegation != NULL) {
473 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
474 memcpy(&state->stateid, &delegation->stateid,
475 sizeof(state->stateid));
476 set_bit(NFS_DELEGATED_STATE, &state->flags);
477 return 0;
478 }
864472e9 479 delegation_type = delegation->type;
1da177e4 480 }
864472e9
TM		 481 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
482 if (opendata == NULL)
cee54fc9 483 return -ENOMEM;
864472e9
TM		 484 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
485 opendata->o_arg.fh = NFS_FH(state->inode);
486 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
487 opendata->o_arg.u.delegation_type = delegation_type;
488 status = nfs4_open_recover(opendata, state);
489 nfs4_opendata_free(opendata);
1da177e4
LT		 490 return status;
491}
492
864472e9 493static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4
LT		 494{
495 struct nfs_server *server = NFS_SERVER(state->inode);
496 struct nfs4_exception exception = { };
497 int err;
498 do {
864472e9 499 err = _nfs4_do_open_reclaim(sp, state, dentry);
202b50dc
TM		 500 if (err != -NFS4ERR_DELAY)
501 break;
502 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 503 } while (exception.retry);
504 return err;
505}
506
864472e9
TM		 507static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
508{
509 struct nfs_open_context *ctx;
510 int ret;
511
512 ctx = nfs4_state_find_open_context(state);
513 if (IS_ERR(ctx))
514 return PTR_ERR(ctx);
515 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
516 put_nfs_open_context(ctx);
517 return ret;
518}
519
1da177e4
LT		 520static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
521{
522 struct nfs4_state_owner *sp = state->owner;
e56e0b78 523 struct nfs4_opendata *opendata;
864472e9 524 int ret;
1da177e4 525
1da177e4 526 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
864472e9
TM		 527 return 0;
528 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
e56e0b78 529 if (opendata == NULL)
864472e9 530 return -ENOMEM;
e56e0b78 531 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
e56e0b78
TM		 532 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
533 sizeof(opendata->o_arg.u.delegation.data));
864472e9 534 ret = nfs4_open_recover(opendata, state);
e56e0b78 535 nfs4_opendata_free(opendata);
864472e9 536 return ret;
1da177e4
LT		 537}
538
539int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
540{
541 struct nfs4_exception exception = { };
542 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
543 int err;
544 do {
545 err = _nfs4_open_delegation_recall(dentry, state);
546 switch (err) {
547 case 0:
548 return err;
549 case -NFS4ERR_STALE_CLIENTID:
550 case -NFS4ERR_STALE_STATEID:
551 case -NFS4ERR_EXPIRED:
552 /* Don't recall a delegation if it was lost */
7539bbab 553 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 554 return err;
555 }
556 err = nfs4_handle_exception(server, err, &exception);
557 } while (exception.retry);
558 return err;
559}
560
cdd4e68b 561static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 562{
cdd4e68b
TM		 563 struct nfs4_opendata *data = calldata;
564 struct rpc_message msg = {
565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
566 .rpc_argp = &data->c_arg,
567 .rpc_resp = &data->c_res,
568 .rpc_cred = data->owner->so_cred,
1da177e4 569 };
26e976a8 570 data->timestamp = jiffies;
cdd4e68b
TM		 571 rpc_call_setup(task, &msg, 0);
572}
573
574static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
575{
576 struct nfs4_opendata *data = calldata;
577
578 data->rpc_status = task->tk_status;
579 if (RPC_ASSASSINATED(task))
580 return;
26e976a8 581 if (data->rpc_status == 0) {
cdd4e68b
TM		 582 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
583 sizeof(data->o_res.stateid.data));
26e976a8
TM		 584 renew_lease(data->o_res.server, data->timestamp);
585 }
cdd4e68b
TM		 586 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
587 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
588}
589
590static void nfs4_open_confirm_release(void *calldata)
591{
592 struct nfs4_opendata *data = calldata;
593 struct nfs4_state *state = NULL;
594
595 /* If this request hasn't been cancelled, do nothing */
596 if (data->cancelled == 0)
597 goto out_free;
598 /* In case of error, no cleanup! */
599 if (data->rpc_status != 0)
600 goto out_free;
601 nfs_confirm_seqid(&data->owner->so_seqid, 0);
602 state = nfs4_opendata_to_nfs4_state(data);
603 if (state != NULL)
604 nfs4_close_state(state, data->o_arg.open_flags);
605out_free:
606 nfs4_opendata_free(data);
607}
608
609static const struct rpc_call_ops nfs4_open_confirm_ops = {
610 .rpc_call_prepare = nfs4_open_confirm_prepare,
611 .rpc_call_done = nfs4_open_confirm_done,
612 .rpc_release = nfs4_open_confirm_release,
613};
614
615/*
616 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
617 */
618static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
619{
620 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
621 struct rpc_task *task;
1da177e4
LT		 622 int status;
623
cdd4e68b 624 atomic_inc(&data->count);
7a1218a2
TM		 625 /*
626 * If rpc_run_task() ends up calling ->rpc_release(), we
627 * want to ensure that it takes the 'error' code path.
628 */
629 data->rpc_status = -ENOMEM;
cdd4e68b 630 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
7a1218a2 631 if (IS_ERR(task))
cdd4e68b 632 return PTR_ERR(task);
cdd4e68b
TM		 633 status = nfs4_wait_for_completion_rpc_task(task);
634 if (status != 0) {
635 data->cancelled = 1;
636 smp_wmb();
637 } else
638 status = data->rpc_status;
639 rpc_release_task(task);
1da177e4
LT		 640 return status;
641}
642
24ac23ab 643static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 644{
24ac23ab
TM		 645 struct nfs4_opendata *data = calldata;
646 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 647 struct rpc_message msg = {
648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 649 .rpc_argp = &data->o_arg,
650 .rpc_resp = &data->o_res,
1da177e4
LT		 651 .rpc_cred = sp->so_cred,
652 };
24ac23ab
TM		 653
654 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
655 return;
656 /* Update sequence id. */
657 data->o_arg.id = sp->so_id;
658 data->o_arg.clientid = sp->so_client->cl_clientid;
864472e9
TM		 659 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
660 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
26e976a8 661 data->timestamp = jiffies;
24ac23ab
TM		 662 rpc_call_setup(task, &msg, 0);
663}
1da177e4 664
24ac23ab
TM		 665static void nfs4_open_done(struct rpc_task *task, void *calldata)
666{
667 struct nfs4_opendata *data = calldata;
1da177e4 668
24ac23ab
TM		 669 data->rpc_status = task->tk_status;
670 if (RPC_ASSASSINATED(task))
671 return;
672 if (task->tk_status == 0) {
673 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 674 case S_IFREG:
675 break;
676 case S_IFLNK:
24ac23ab 677 data->rpc_status = -ELOOP;
6f926b5b
TM		 678 break;
679 case S_IFDIR:
24ac23ab 680 data->rpc_status = -EISDIR;
6f926b5b
TM		 681 break;
682 default:
24ac23ab 683 data->rpc_status = -ENOTDIR;
6f926b5b 684 }
26e976a8 685 renew_lease(data->o_res.server, data->timestamp);
6f926b5b 686 }
24ac23ab
TM		 687 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
688}
6f926b5b 689
24ac23ab
TM		 690static void nfs4_open_release(void *calldata)
691{
692 struct nfs4_opendata *data = calldata;
693 struct nfs4_state *state = NULL;
694
695 /* If this request hasn't been cancelled, do nothing */
696 if (data->cancelled == 0)
697 goto out_free;
698 /* In case of error, no cleanup! */
699 if (data->rpc_status != 0)
700 goto out_free;
701 /* In case we need an open_confirm, no cleanup! */
702 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
703 goto out_free;
704 nfs_confirm_seqid(&data->owner->so_seqid, 0);
705 state = nfs4_opendata_to_nfs4_state(data);
706 if (state != NULL)
707 nfs4_close_state(state, data->o_arg.open_flags);
708out_free:
709 nfs4_opendata_free(data);
710}
711
712static const struct rpc_call_ops nfs4_open_ops = {
713 .rpc_call_prepare = nfs4_open_prepare,
714 .rpc_call_done = nfs4_open_done,
715 .rpc_release = nfs4_open_release,
716};
717
718/*
719 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
720 */
721static int _nfs4_proc_open(struct nfs4_opendata *data)
722{
723 struct inode *dir = data->dir->d_inode;
724 struct nfs_server *server = NFS_SERVER(dir);
725 struct nfs_openargs *o_arg = &data->o_arg;
726 struct nfs_openres *o_res = &data->o_res;
727 struct rpc_task *task;
728 int status;
729
730 atomic_inc(&data->count);
7a1218a2
TM		 731 /*
732 * If rpc_run_task() ends up calling ->rpc_release(), we
733 * want to ensure that it takes the 'error' code path.
734 */
735 data->rpc_status = -ENOMEM;
24ac23ab 736 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
7a1218a2 737 if (IS_ERR(task))
24ac23ab 738 return PTR_ERR(task);
24ac23ab
TM		 739 status = nfs4_wait_for_completion_rpc_task(task);
740 if (status != 0) {
741 data->cancelled = 1;
742 smp_wmb();
743 } else
744 status = data->rpc_status;
745 rpc_release_task(task);
1da177e4 746 if (status != 0)
24ac23ab
TM		 747 return status;
748
56ae19f3
TM		 749 if (o_arg->open_flags & O_CREAT) {
750 update_changeattr(dir, &o_res->cinfo);
751 nfs_post_op_update_inode(dir, o_res->dir_attr);
752 } else
753 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 754 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 755 status = _nfs4_proc_open_confirm(data);
1da177e4 756 if (status != 0)
24ac23ab 757 return status;
1da177e4 758 }
24ac23ab 759 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1da177e4 760 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8fa5c000 761 return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 762 return 0;
1da177e4
LT		 763}
764
765static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
766{
767 struct nfs_access_entry cache;
768 int mask = 0;
769 int status;
770
771 if (openflags & FMODE_READ)
772 mask |= MAY_READ;
773 if (openflags & FMODE_WRITE)
774 mask |= MAY_WRITE;
775 status = nfs_access_get_cached(inode, cred, &cache);
776 if (status == 0)
777 goto out;
778
779 /* Be clever: ask server to check for all possible rights */
780 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
781 cache.cred = cred;
782 cache.jiffies = jiffies;
783 status = _nfs4_proc_access(inode, &cache);
784 if (status != 0)
785 return status;
786 nfs_access_add_cache(inode, &cache);
787out:
788 if ((cache.mask & mask) == mask)
789 return 0;
790 return -EACCES;
791}
792
58d9714a
TM		 793int nfs4_recover_expired_lease(struct nfs_server *server)
794{
7539bbab 795 struct nfs_client *clp = server->nfs_client;
6b30954e 796 int ret;
58d9714a 797
6b30954e
TM		 798 for (;;) {
799 ret = nfs4_wait_clnt_recover(server->client, clp);
800 if (ret != 0)
801 return ret;
802 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
803 break;
58d9714a 804 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 805 }
806 return 0;
58d9714a
TM		 807}
808
1da177e4
LT		 809/*
810 * OPEN_EXPIRED:
811 * reclaim state on the server after a network partition.
812 * Assumes caller holds the appropriate lock
813 */
814static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
815{
1da177e4 816 struct inode *inode = state->inode;
1da177e4 817 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
e56e0b78 818 struct nfs4_opendata *opendata;
24ac23ab 819 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
864472e9 820 int ret;
1da177e4
LT		 821
822 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
864472e9
TM		 823 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
824 if (ret < 0)
825 return ret;
1da177e4
LT		 826 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
827 set_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9 828 return 0;
1da177e4 829 }
24ac23ab 830 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
e56e0b78 831 if (opendata == NULL)
864472e9
TM		 832 return -ENOMEM;
833 ret = nfs4_open_recover(opendata, state);
834 if (ret == -ESTALE) {
835 /* Invalidate the state owner so we don't ever use it again */
836 nfs4_drop_state_owner(sp);
837 d_drop(dentry);
1da177e4 838 }
e56e0b78 839 nfs4_opendata_free(opendata);
864472e9 840 return ret;
1da177e4
LT		 841}
842
202b50dc
TM		 843static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
844{
845 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
846 struct nfs4_exception exception = { };
847 int err;
848
849 do {
850 err = _nfs4_open_expired(sp, state, dentry);
851 if (err == -NFS4ERR_DELAY)
852 nfs4_handle_exception(server, err, &exception);
853 } while (exception.retry);
854 return err;
855}
856
1da177e4
LT		 857static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
858{
1da177e4 859 struct nfs_open_context *ctx;
864472e9 860 int ret;
1da177e4 861
864472e9
TM		 862 ctx = nfs4_state_find_open_context(state);
863 if (IS_ERR(ctx))
864 return PTR_ERR(ctx);
865 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
866 put_nfs_open_context(ctx);
867 return ret;
1da177e4
LT		 868}
869
870/*
24ac23ab 871 * Returns a referenced nfs4_state if there is an open delegation on the file
1da177e4
LT		 872 */
873static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
874{
875 struct nfs_delegation *delegation;
876 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 877 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 878 struct nfs_inode *nfsi = NFS_I(inode);
879 struct nfs4_state_owner *sp = NULL;
880 struct nfs4_state *state = NULL;
881 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
882 int err;
883
b4454fe1
TM		 884 err = -ENOMEM;
885 if (!(sp = nfs4_get_state_owner(server, cred))) {
886 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
887 return err;
888 }
58d9714a
TM		 889 err = nfs4_recover_expired_lease(server);
890 if (err != 0)
b4454fe1 891 goto out_put_state_owner;
1da177e4
LT		 892 /* Protect against reboot recovery - NOTE ORDER! */
893 down_read(&clp->cl_sem);
894 /* Protect against delegation recall */
895 down_read(&nfsi->rwsem);
896 delegation = NFS_I(inode)->delegation;
897 err = -ENOENT;
898 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
899 goto out_err;
900 err = -ENOMEM;
1da177e4
LT		 901 state = nfs4_get_open_state(inode, sp);
902 if (state == NULL)
903 goto out_err;
904
905 err = -ENOENT;
906 if ((state->state & open_flags) == open_flags) {
907 spin_lock(&inode->i_lock);
e7616923 908 update_open_stateflags(state, open_flags);
1da177e4
LT		 909 spin_unlock(&inode->i_lock);
910 goto out_ok;
911 } else if (state->state != 0)
b4454fe1 912 goto out_put_open_state;
1da177e4
LT		 913
914 lock_kernel();
915 err = _nfs4_do_access(inode, cred, open_flags);
916 unlock_kernel();
917 if (err != 0)
b4454fe1 918 goto out_put_open_state;
1da177e4
LT		 919 set_bit(NFS_DELEGATED_STATE, &state->flags);
920 update_open_stateid(state, &delegation->stateid, open_flags);
921out_ok:
1da177e4
LT		 922 nfs4_put_state_owner(sp);
923 up_read(&nfsi->rwsem);
924 up_read(&clp->cl_sem);
1da177e4 925 *res = state;
b4454fe1
TM		 926 return 0;
927out_put_open_state:
928 nfs4_put_open_state(state);
1da177e4 929out_err:
1da177e4
LT		 930 up_read(&nfsi->rwsem);
931 up_read(&clp->cl_sem);
b8e5c4c2
TM		 932 if (err != -EACCES)
933 nfs_inode_return_delegation(inode);
b4454fe1
TM		 934out_put_state_owner:
935 nfs4_put_state_owner(sp);
1da177e4
LT		 936 return err;
937}
938
939static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
940{
941 struct nfs4_exception exception = { };
a162a6b8 942 struct nfs4_state *res = ERR_PTR(-EIO);
1da177e4
LT		 943 int err;
944
945 do {
946 err = _nfs4_open_delegated(inode, flags, cred, &res);
947 if (err == 0)
948 break;
949 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
950 err, &exception));
951 } while (exception.retry);
952 return res;
953}
954
955/*
24ac23ab 956 * Returns a referenced nfs4_state
1da177e4
LT		 957 */
958static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
959{
960 struct nfs4_state_owner *sp;
961 struct nfs4_state *state = NULL;
962 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 963 struct nfs_client *clp = server->nfs_client;
e56e0b78 964 struct nfs4_opendata *opendata;
1da177e4 965 int status;
1da177e4
LT		 966
967 /* Protect against reboot recovery conflicts */
1da177e4
LT		 968 status = -ENOMEM;
969 if (!(sp = nfs4_get_state_owner(server, cred))) {
970 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
971 goto out_err;
972 }
58d9714a
TM		 973 status = nfs4_recover_expired_lease(server);
974 if (status != 0)
b4454fe1 975 goto err_put_state_owner;
58d9714a
TM		 976 down_read(&clp->cl_sem);
977 status = -ENOMEM;
e56e0b78
TM		 978 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
979 if (opendata == NULL)
76723de0 980 goto err_release_rwsem;
1da177e4 981
24ac23ab 982 status = _nfs4_proc_open(opendata);
1da177e4 983 if (status != 0)
e56e0b78 984 goto err_opendata_free;
1da177e4
LT		 985
986 status = -ENOMEM;
24ac23ab
TM		 987 state = nfs4_opendata_to_nfs4_state(opendata);
988 if (state == NULL)
e56e0b78 989 goto err_opendata_free;
e56e0b78 990 if (opendata->o_res.delegation_type != 0)
24ac23ab 991 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
e56e0b78 992 nfs4_opendata_free(opendata);
1da177e4
LT		 993 nfs4_put_state_owner(sp);
994 up_read(&clp->cl_sem);
995 *res = state;
996 return 0;
e56e0b78
TM		 997err_opendata_free:
998 nfs4_opendata_free(opendata);
76723de0
TM		 999err_release_rwsem:
1000 up_read(&clp->cl_sem);
e56e0b78
TM		 1001err_put_state_owner:
1002 nfs4_put_state_owner(sp);
1da177e4 1003out_err:
1da177e4
LT		 1004 *res = NULL;
1005 return status;
1006}
1007
1008
1009static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
1010{
1011 struct nfs4_exception exception = { };
1012 struct nfs4_state *res;
1013 int status;
1014
1015 do {
1016 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
1017 if (status == 0)
1018 break;
1019 /* NOTE: BAD_SEQID means the server and client disagree about the
1020 * book-keeping w.r.t. state-changing operations
1021 * (OPEN/CLOSE/LOCK/LOCKU...)
1022 * It is actually a sign of a bug on the client or on the server.
1023 *
1024 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1025 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1026 * have unhashed the old state_owner for us, and that we can
1027 * therefore safely retry using a new one. We should still warn
1028 * the user though...
1029 */
1030 if (status == -NFS4ERR_BAD_SEQID) {
1031 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1032 exception.retry = 1;
1033 continue;
1034 }
550f5747
TM		 1035 /*
1036 * BAD_STATEID on OPEN means that the server cancelled our
1037 * state before it received the OPEN_CONFIRM.
1038 * Recover by retrying the request as per the discussion
1039 * on Page 181 of RFC3530.
1040 */
1041 if (status == -NFS4ERR_BAD_STATEID) {
1042 exception.retry = 1;
1043 continue;
1044 }
1da177e4
LT		 1045 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1046 status, &exception));
1047 } while (exception.retry);
1048 return res;
1049}
1050
3e4f6290
TM		 1051static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1052 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1053{
3e4f6290 1054 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1055 struct nfs_setattrargs arg = {
3e4f6290 1056 .fh = NFS_FH(inode),
1da177e4
LT		 1057 .iap = sattr,
1058 .server = server,
1059 .bitmask = server->attr_bitmask,
1060 };
1061 struct nfs_setattrres res = {
1062 .fattr = fattr,
1063 .server = server,
1064 };
1065 struct rpc_message msg = {
1066 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1067 .rpc_argp = &arg,
1068 .rpc_resp = &res,
1069 };
26e976a8 1070 unsigned long timestamp = jiffies;
65e4308d 1071 int status;
1da177e4 1072
0e574af1 1073 nfs_fattr_init(fattr);
1da177e4 1074
3e4f6290
TM		 1075 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1076 /* Use that stateid */
1077 } else if (state != NULL) {
1da177e4 1078 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1079 nfs4_copy_stateid(&arg.stateid, state, current->files);
1080 } else
1da177e4
LT		 1081 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1082
65e4308d 1083 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1084 if (status == 0 && state != NULL)
1085 renew_lease(server, timestamp);
65e4308d 1086 return status;
1da177e4
LT		 1087}
1088
3e4f6290
TM		 1089static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1090 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1091{
3e4f6290 1092 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1093 struct nfs4_exception exception = { };
1094 int err;
1095 do {
1096 err = nfs4_handle_exception(server,
3e4f6290 1097 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1098 &exception);
1099 } while (exception.retry);
1100 return err;
1101}
1102
1103struct nfs4_closedata {
1104 struct inode *inode;
1105 struct nfs4_state *state;
1106 struct nfs_closeargs arg;
1107 struct nfs_closeres res;
516a6af6 1108 struct nfs_fattr fattr;
26e976a8 1109 unsigned long timestamp;
1da177e4
LT		 1110};
1111
963d8fe5 1112static void nfs4_free_closedata(void *data)
9512135d 1113{
963d8fe5
TM		 1114 struct nfs4_closedata *calldata = data;
1115 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1116
1117 nfs4_put_open_state(calldata->state);
1118 nfs_free_seqid(calldata->arg.seqid);
9512135d 1119 nfs4_put_state_owner(sp);
9512135d
TM		 1120 kfree(calldata);
1121}
1122
963d8fe5 1123static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1124{
963d8fe5 1125 struct nfs4_closedata *calldata = data;
1da177e4 1126 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1127 struct nfs_server *server = NFS_SERVER(calldata->inode);
1128
4ce70ada
TM		 1129 if (RPC_ASSASSINATED(task))
1130 return;
1da177e4
LT		 1131 /* hmm. we are done with the inode, and in the process of freeing
1132 * the state_owner. we keep this around to process errors
1133 */
cee54fc9 1134 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1135 switch (task->tk_status) {
1136 case 0:
1137 memcpy(&state->stateid, &calldata->res.stateid,
1138 sizeof(state->stateid));
26e976a8 1139 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1140 break;
1141 case -NFS4ERR_STALE_STATEID:
1142 case -NFS4ERR_EXPIRED:
7539bbab 1143 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 1144 break;
1145 default:
1146 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1147 rpc_restart_call(task);
1148 return;
1149 }
1150 }
516a6af6 1151 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1152}
1153
4ce70ada 1154static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1155{
4ce70ada 1156 struct nfs4_closedata *calldata = data;
9512135d 1157 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1158 struct rpc_message msg = {
1159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1160 .rpc_argp = &calldata->arg,
1161 .rpc_resp = &calldata->res,
9512135d 1162 .rpc_cred = state->owner->so_cred,
1da177e4 1163 };
4cecb76f 1164 int mode = 0, old_mode;
9512135d 1165
963d8fe5 1166 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1167 return;
9512135d
TM		 1168 /* Recalculate the new open mode in case someone reopened the file
1169 * while we were waiting in line to be scheduled.
1170 */
4cecb76f
TM		 1171 spin_lock(&state->owner->so_lock);
1172 spin_lock(&calldata->inode->i_lock);
1173 mode = old_mode = state->state;
e7616923
TM		 1174 if (state->n_rdwr == 0) {
1175 if (state->n_rdonly == 0)
1176 mode &= ~FMODE_READ;
1177 if (state->n_wronly == 0)
1178 mode &= ~FMODE_WRITE;
1179 }
4cecb76f
TM		 1180 nfs4_state_set_mode_locked(state, mode);
1181 spin_unlock(&calldata->inode->i_lock);
1182 spin_unlock(&state->owner->so_lock);
1183 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
963d8fe5
TM		 1184 /* Note: exit _without_ calling nfs4_close_done */
1185 task->tk_action = NULL;
9512135d
TM		 1186 return;
1187 }
516a6af6 1188 nfs_fattr_init(calldata->res.fattr);
9512135d 1189 if (mode != 0)
1da177e4 1190 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d 1191 calldata->arg.open_flags = mode;
26e976a8 1192 calldata->timestamp = jiffies;
9512135d 1193 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1194}
1195
963d8fe5 1196static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1197 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1198 .rpc_call_done = nfs4_close_done,
1199 .rpc_release = nfs4_free_closedata,
1200};
1201
1da177e4
LT		 1202/*
1203 * It is possible for data to be read/written from a mem-mapped file
1204 * after the sys_close call (which hits the vfs layer as a flush).
1205 * This means that we can't safely call nfsv4 close on a file until
1206 * the inode is cleared. This in turn means that we are not good
1207 * NFSv4 citizens - we do not indicate to the server to update the file's
1208 * share state even when we are done with one of the three share
1209 * stateid's in the inode.
1210 *
1211 * NOTE: Caller must be holding the sp->so_owner semaphore!
1212 */
4cecb76f 1213int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1da177e4 1214{
516a6af6 1215 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1216 struct nfs4_closedata *calldata;
9512135d 1217 int status = -ENOMEM;
1da177e4 1218
9512135d 1219 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1220 if (calldata == NULL)
9512135d 1221 goto out;
1da177e4
LT		 1222 calldata->inode = inode;
1223 calldata->state = state;
1224 calldata->arg.fh = NFS_FH(inode);
9512135d 1225 calldata->arg.stateid = &state->stateid;
1da177e4 1226 /* Serialization for the sequence id */
cee54fc9 1227 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1228 if (calldata->arg.seqid == NULL)
1229 goto out_free_calldata;
516a6af6
TM		 1230 calldata->arg.bitmask = server->attr_bitmask;
1231 calldata->res.fattr = &calldata->fattr;
1232 calldata->res.server = server;
9512135d 1233
4ce70ada 1234 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
9512135d
TM		 1235 if (status == 0)
1236 goto out;
1237
1238 nfs_free_seqid(calldata->arg.seqid);
1239out_free_calldata:
1240 kfree(calldata);
1241out:
1242 return status;
1da177e4
LT		 1243}
1244
95cf959b 1245static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
02a913a7
TM		 1246{
1247 struct file *filp;
1248
1249 filp = lookup_instantiate_filp(nd, dentry, NULL);
1250 if (!IS_ERR(filp)) {
1251 struct nfs_open_context *ctx;
1252 ctx = (struct nfs_open_context *)filp->private_data;
1253 ctx->state = state;
95cf959b
TM		 1254 return 0;
1255 }
1256 nfs4_close_state(state, nd->intent.open.flags);
1257 return PTR_ERR(filp);
02a913a7
TM		 1258}
1259
1260struct dentry *
1da177e4
LT		 1261nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1262{
1263 struct iattr attr;
1264 struct rpc_cred *cred;
1265 struct nfs4_state *state;
02a913a7 1266 struct dentry *res;
1da177e4
LT		 1267
1268 if (nd->flags & LOOKUP_CREATE) {
1269 attr.ia_mode = nd->intent.open.create_mode;
1270 attr.ia_valid = ATTR_MODE;
1271 if (!IS_POSIXACL(dir))
1272 attr.ia_mode &= ~current->fs->umask;
1273 } else {
1274 attr.ia_valid = 0;
1275 BUG_ON(nd->intent.open.flags & O_CREAT);
1276 }
1277
1f163415 1278 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4 1279 if (IS_ERR(cred))
02a913a7 1280 return (struct dentry *)cred;
1da177e4
LT		 1281 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1282 put_rpccred(cred);
02a913a7
TM		 1283 if (IS_ERR(state)) {
1284 if (PTR_ERR(state) == -ENOENT)
1285 d_add(dentry, NULL);
1286 return (struct dentry *)state;
1287 }
24ac23ab 1288 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM		 1289 if (res != NULL)
1290 dentry = res;
1291 nfs4_intent_set_file(nd, dentry, state);
1292 return res;
1da177e4
LT		 1293}
1294
1295int
02a913a7 1296nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4
LT		 1297{
1298 struct rpc_cred *cred;
1299 struct nfs4_state *state;
1da177e4 1300
1f163415 1301 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1302 if (IS_ERR(cred))
1303 return PTR_ERR(cred);
1304 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1305 if (IS_ERR(state))
1306 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1307 put_rpccred(cred);
02a913a7
TM		 1308 if (IS_ERR(state)) {
1309 switch (PTR_ERR(state)) {
1310 case -EPERM:
1311 case -EACCES:
1312 case -EDQUOT:
1313 case -ENOSPC:
1314 case -EROFS:
1315 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1316 return 1;
b87c0adf
CL		 1317 default:
1318 goto out_drop;
02a913a7 1319 }
02a913a7 1320 }
24ac23ab 1321 if (state->inode == dentry->d_inode) {
02a913a7 1322 nfs4_intent_set_file(nd, dentry, state);
1da177e4
LT		 1323 return 1;
1324 }
1da177e4 1325 nfs4_close_state(state, openflags);
02a913a7
TM		 1326out_drop:
1327 d_drop(dentry);
1da177e4
LT		 1328 return 0;
1329}
1330
1331
1332static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1333{
1334 struct nfs4_server_caps_res res = {};
1335 struct rpc_message msg = {
1336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1337 .rpc_argp = fhandle,
1338 .rpc_resp = &res,
1339 };
1340 int status;
1341
1342 status = rpc_call_sync(server->client, &msg, 0);
1343 if (status == 0) {
1344 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1345 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1346 server->caps |= NFS_CAP_ACLS;
1347 if (res.has_links != 0)
1348 server->caps |= NFS_CAP_HARDLINKS;
1349 if (res.has_symlinks != 0)
1350 server->caps |= NFS_CAP_SYMLINKS;
1351 server->acl_bitmask = res.acl_bitmask;
1352 }
1353 return status;
1354}
1355
55a97593 1356int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1357{
1358 struct nfs4_exception exception = { };
1359 int err;
1360 do {
1361 err = nfs4_handle_exception(server,
1362 _nfs4_server_capabilities(server, fhandle),
1363 &exception);
1364 } while (exception.retry);
1365 return err;
1366}
1367
1368static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1369 struct nfs_fsinfo *info)
1370{
1da177e4
LT		 1371 struct nfs4_lookup_root_arg args = {
1372 .bitmask = nfs4_fattr_bitmap,
1373 };
1374 struct nfs4_lookup_res res = {
1375 .server = server,
0e574af1 1376 .fattr = info->fattr,
1da177e4
LT		 1377 .fh = fhandle,
1378 };
1379 struct rpc_message msg = {
1380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1381 .rpc_argp = &args,
1382 .rpc_resp = &res,
1383 };
0e574af1 1384 nfs_fattr_init(info->fattr);
1da177e4
LT		 1385 return rpc_call_sync(server->client, &msg, 0);
1386}
1387
1388static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1389 struct nfs_fsinfo *info)
1390{
1391 struct nfs4_exception exception = { };
1392 int err;
1393 do {
1394 err = nfs4_handle_exception(server,
1395 _nfs4_lookup_root(server, fhandle, info),
1396 &exception);
1397 } while (exception.retry);
1398 return err;
1399}
1400
54ceac45
DH		 1401/*
1402 * get the file handle for the "/" directory on the server
1403 */
1da177e4 1404static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1405 struct nfs_fsinfo *info)
1da177e4 1406{
1da177e4
LT		 1407 int status;
1408
1da177e4 1409 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1410 if (status == 0)
1411 status = nfs4_server_capabilities(server, fhandle);
1412 if (status == 0)
1413 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1414 return nfs4_map_errors(status);
1da177e4
LT		 1415}
1416
6b97fd3d
MN		 1417/*
1418 * Get locations and (maybe) other attributes of a referral.
1419 * Note that we'll actually follow the referral later when
1420 * we detect fsid mismatch in inode revalidation
1421 */
1422static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1423{
1424 int status = -ENOMEM;
1425 struct page *page = NULL;
1426 struct nfs4_fs_locations *locations = NULL;
1427 struct dentry dentry = {};
1428
1429 page = alloc_page(GFP_KERNEL);
1430 if (page == NULL)
1431 goto out;
1432 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1433 if (locations == NULL)
1434 goto out;
1435
1436 dentry.d_name.name = name->name;
1437 dentry.d_name.len = name->len;
1438 status = nfs4_proc_fs_locations(dir, &dentry, locations, page);
1439 if (status != 0)
1440 goto out;
1441 /* Make sure server returned a different fsid for the referral */
1442 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1443 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1444 status = -EIO;
1445 goto out;
1446 }
1447
1448 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1449 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1450 if (!fattr->mode)
1451 fattr->mode = S_IFDIR;
1452 memset(fhandle, 0, sizeof(struct nfs_fh));
1453out:
1454 if (page)
1455 __free_page(page);
1456 if (locations)
1457 kfree(locations);
1458 return status;
1459}
1460
1da177e4
LT		 1461static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1462{
1463 struct nfs4_getattr_arg args = {
1464 .fh = fhandle,
1465 .bitmask = server->attr_bitmask,
1466 };
1467 struct nfs4_getattr_res res = {
1468 .fattr = fattr,
1469 .server = server,
1470 };
1471 struct rpc_message msg = {
1472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1473 .rpc_argp = &args,
1474 .rpc_resp = &res,
1475 };
1476
0e574af1 1477 nfs_fattr_init(fattr);
1da177e4
LT		 1478 return rpc_call_sync(server->client, &msg, 0);
1479}
1480
1481static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1482{
1483 struct nfs4_exception exception = { };
1484 int err;
1485 do {
1486 err = nfs4_handle_exception(server,
1487 _nfs4_proc_getattr(server, fhandle, fattr),
1488 &exception);
1489 } while (exception.retry);
1490 return err;
1491}
1492
1493/*
1494 * The file is not closed if it is opened due to the a request to change
1495 * the size of the file. The open call will not be needed once the
1496 * VFS layer lookup-intents are implemented.
1497 *
1498 * Close is called when the inode is destroyed.
1499 * If we haven't opened the file for O_WRONLY, we
1500 * need to in the size_change case to obtain a stateid.
1501 *
1502 * Got race?
1503 * Because OPEN is always done by name in nfsv4, it is
1504 * possible that we opened a different file by the same
1505 * name. We can recognize this race condition, but we
1506 * can't do anything about it besides returning an error.
1507 *
1508 * This will be fixed with VFS changes (lookup-intent).
1509 */
1510static int
1511nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1512 struct iattr *sattr)
1513{
08e9eac4
TM		 1514 struct rpc_cred *cred;
1515 struct inode *inode = dentry->d_inode;
d530838b
TM		 1516 struct nfs_open_context *ctx;
1517 struct nfs4_state *state = NULL;
1da177e4
LT		 1518 int status;
1519
0e574af1 1520 nfs_fattr_init(fattr);
1da177e4 1521
1f163415 1522 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM		 1523 if (IS_ERR(cred))
1524 return PTR_ERR(cred);
d530838b
TM		 1525
1526 /* Search for an existing open(O_WRITE) file */
1527 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1528 if (ctx != NULL)
1529 state = ctx->state;
08e9eac4 1530
3e4f6290 1531 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1532 if (status == 0)
1533 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1534 if (ctx != NULL)
1535 put_nfs_open_context(ctx);
08e9eac4 1536 put_rpccred(cred);
1da177e4
LT		 1537 return status;
1538}
1539
2b3de441
DH		 1540static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1541 struct qstr *name, struct nfs_fh *fhandle,
1542 struct nfs_fattr *fattr)
1543{
1544 int status;
1545 struct nfs4_lookup_arg args = {
1546 .bitmask = server->attr_bitmask,
1547 .dir_fh = dirfh,
1548 .name = name,
1549 };
1550 struct nfs4_lookup_res res = {
1551 .server = server,
1552 .fattr = fattr,
1553 .fh = fhandle,
1554 };
1555 struct rpc_message msg = {
1556 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1557 .rpc_argp = &args,
1558 .rpc_resp = &res,
1559 };
1560
1561 nfs_fattr_init(fattr);
1562
1563 dprintk("NFS call lookupfh %s\n", name->name);
1564 status = rpc_call_sync(server->client, &msg, 0);
1565 dprintk("NFS reply lookupfh: %d\n", status);
1566 if (status == -NFS4ERR_MOVED)
1567 status = -EREMOTE;
1568 return status;
1569}
1570
1571static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1572 struct qstr *name, struct nfs_fh *fhandle,
1573 struct nfs_fattr *fattr)
1574{
1575 struct nfs4_exception exception = { };
1576 int err;
1577 do {
1578 err = nfs4_handle_exception(server,
1579 _nfs4_proc_lookupfh(server, dirfh, name,
1580 fhandle, fattr),
1581 &exception);
1582 } while (exception.retry);
1583 return err;
1584}
1585
1da177e4
LT		 1586static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1587 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1588{
1589 int status;
1590 struct nfs_server *server = NFS_SERVER(dir);
1591 struct nfs4_lookup_arg args = {
1592 .bitmask = server->attr_bitmask,
1593 .dir_fh = NFS_FH(dir),
1594 .name = name,
1595 };
1596 struct nfs4_lookup_res res = {
1597 .server = server,
1598 .fattr = fattr,
1599 .fh = fhandle,
1600 };
1601 struct rpc_message msg = {
1602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1603 .rpc_argp = &args,
1604 .rpc_resp = &res,
1605 };
1606
0e574af1 1607 nfs_fattr_init(fattr);
1da177e4
LT		 1608
1609 dprintk("NFS call lookup %s\n", name->name);
1610 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
6b97fd3d
MN		 1611 if (status == -NFS4ERR_MOVED)
1612 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1613 dprintk("NFS reply lookup: %d\n", status);
1614 return status;
1615}
1616
1617static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1618{
1619 struct nfs4_exception exception = { };
1620 int err;
1621 do {
1622 err = nfs4_handle_exception(NFS_SERVER(dir),
1623 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1624 &exception);
1625 } while (exception.retry);
1626 return err;
1627}
1628
1629static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1630{
1631 struct nfs4_accessargs args = {
1632 .fh = NFS_FH(inode),
1633 };
1634 struct nfs4_accessres res = { 0 };
1635 struct rpc_message msg = {
1636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1637 .rpc_argp = &args,
1638 .rpc_resp = &res,
1639 .rpc_cred = entry->cred,
1640 };
1641 int mode = entry->mask;
1642 int status;
1643
1644 /*
1645 * Determine which access bits we want to ask for...
1646 */
1647 if (mode & MAY_READ)
1648 args.access |= NFS4_ACCESS_READ;
1649 if (S_ISDIR(inode->i_mode)) {
1650 if (mode & MAY_WRITE)
1651 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1652 if (mode & MAY_EXEC)
1653 args.access |= NFS4_ACCESS_LOOKUP;
1654 } else {
1655 if (mode & MAY_WRITE)
1656 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1657 if (mode & MAY_EXEC)
1658 args.access |= NFS4_ACCESS_EXECUTE;
1659 }
1660 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1661 if (!status) {
1662 entry->mask = 0;
1663 if (res.access & NFS4_ACCESS_READ)
1664 entry->mask |= MAY_READ;
1665 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1666 entry->mask |= MAY_WRITE;
1667 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1668 entry->mask |= MAY_EXEC;
1669 }
1670 return status;
1671}
1672
1673static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1674{
1675 struct nfs4_exception exception = { };
1676 int err;
1677 do {
1678 err = nfs4_handle_exception(NFS_SERVER(inode),
1679 _nfs4_proc_access(inode, entry),
1680 &exception);
1681 } while (exception.retry);
1682 return err;
1683}
1684
1685/*
1686 * TODO: For the time being, we don't try to get any attributes
1687 * along with any of the zero-copy operations READ, READDIR,
1688 * READLINK, WRITE.
1689 *
1690 * In the case of the first three, we want to put the GETATTR
1691 * after the read-type operation -- this is because it is hard
1692 * to predict the length of a GETATTR response in v4, and thus
1693 * align the READ data correctly. This means that the GETATTR
1694 * may end up partially falling into the page cache, and we should
1695 * shift it into the 'tail' of the xdr_buf before processing.
1696 * To do this efficiently, we need to know the total length
1697 * of data received, which doesn't seem to be available outside
1698 * of the RPC layer.
1699 *
1700 * In the case of WRITE, we also want to put the GETATTR after
1701 * the operation -- in this case because we want to make sure
1702 * we get the post-operation mtime and size. This means that
1703 * we can't use xdr_encode_pages() as written: we need a variant
1704 * of it which would leave room in the 'tail' iovec.
1705 *
1706 * Both of these changes to the XDR layer would in fact be quite
1707 * minor, but I decided to leave them for a subsequent patch.
1708 */
1709static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1710 unsigned int pgbase, unsigned int pglen)
1711{
1712 struct nfs4_readlink args = {
1713 .fh = NFS_FH(inode),
1714 .pgbase = pgbase,
1715 .pglen = pglen,
1716 .pages = &page,
1717 };
1718 struct rpc_message msg = {
1719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1720 .rpc_argp = &args,
1721 .rpc_resp = NULL,
1722 };
1723
1724 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1725}
1726
1727static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1728 unsigned int pgbase, unsigned int pglen)
1729{
1730 struct nfs4_exception exception = { };
1731 int err;
1732 do {
1733 err = nfs4_handle_exception(NFS_SERVER(inode),
1734 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1735 &exception);
1736 } while (exception.retry);
1737 return err;
1738}
1739
1740static int _nfs4_proc_read(struct nfs_read_data *rdata)
1741{
1742 int flags = rdata->flags;
1743 struct inode *inode = rdata->inode;
1744 struct nfs_fattr *fattr = rdata->res.fattr;
1745 struct nfs_server *server = NFS_SERVER(inode);
1746 struct rpc_message msg = {
1747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1748 .rpc_argp = &rdata->args,
1749 .rpc_resp = &rdata->res,
1750 .rpc_cred = rdata->cred,
1751 };
1752 unsigned long timestamp = jiffies;
1753 int status;
1754
1755 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1756 (long long) rdata->args.offset);
1757
0e574af1 1758 nfs_fattr_init(fattr);
1da177e4
LT		 1759 status = rpc_call_sync(server->client, &msg, flags);
1760 if (!status)
1761 renew_lease(server, timestamp);
1762 dprintk("NFS reply read: %d\n", status);
1763 return status;
1764}
1765
1766static int nfs4_proc_read(struct nfs_read_data *rdata)
1767{
1768 struct nfs4_exception exception = { };
1769 int err;
1770 do {
1771 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1772 _nfs4_proc_read(rdata),
1773 &exception);
1774 } while (exception.retry);
1775 return err;
1776}
1777
1778static int _nfs4_proc_write(struct nfs_write_data *wdata)
1779{
1780 int rpcflags = wdata->flags;
1781 struct inode *inode = wdata->inode;
1782 struct nfs_fattr *fattr = wdata->res.fattr;
1783 struct nfs_server *server = NFS_SERVER(inode);
1784 struct rpc_message msg = {
1785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1786 .rpc_argp = &wdata->args,
1787 .rpc_resp = &wdata->res,
1788 .rpc_cred = wdata->cred,
1789 };
1790 int status;
1791
1792 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1793 (long long) wdata->args.offset);
1794
3b6efee9
TM		 1795 wdata->args.bitmask = server->attr_bitmask;
1796 wdata->res.server = server;
26e976a8 1797 wdata->timestamp = jiffies;
0e574af1 1798 nfs_fattr_init(fattr);
1da177e4
LT		 1799 status = rpc_call_sync(server->client, &msg, rpcflags);
1800 dprintk("NFS reply write: %d\n", status);
3b6efee9
TM		 1801 if (status < 0)
1802 return status;
26e976a8 1803 renew_lease(server, wdata->timestamp);
3b6efee9
TM		 1804 nfs_post_op_update_inode(inode, fattr);
1805 return wdata->res.count;
1da177e4
LT		 1806}
1807
1808static int nfs4_proc_write(struct nfs_write_data *wdata)
1809{
1810 struct nfs4_exception exception = { };
1811 int err;
1812 do {
1813 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1814 _nfs4_proc_write(wdata),
1815 &exception);
1816 } while (exception.retry);
1817 return err;
1818}
1819
1820static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1821{
1822 struct inode *inode = cdata->inode;
1823 struct nfs_fattr *fattr = cdata->res.fattr;
1824 struct nfs_server *server = NFS_SERVER(inode);
1825 struct rpc_message msg = {
1826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1827 .rpc_argp = &cdata->args,
1828 .rpc_resp = &cdata->res,
1829 .rpc_cred = cdata->cred,
1830 };
1831 int status;
1832
1833 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1834 (long long) cdata->args.offset);
1835
3b6efee9
TM		 1836 cdata->args.bitmask = server->attr_bitmask;
1837 cdata->res.server = server;
26e976a8 1838 cdata->timestamp = jiffies;
0e574af1 1839 nfs_fattr_init(fattr);
1da177e4 1840 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1841 if (status >= 0)
1842 renew_lease(server, cdata->timestamp);
1da177e4 1843 dprintk("NFS reply commit: %d\n", status);
3b6efee9
TM		 1844 if (status >= 0)
1845 nfs_post_op_update_inode(inode, fattr);
1da177e4
LT		 1846 return status;
1847}
1848
1849static int nfs4_proc_commit(struct nfs_write_data *cdata)
1850{
1851 struct nfs4_exception exception = { };
1852 int err;
1853 do {
1854 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1855 _nfs4_proc_commit(cdata),
1856 &exception);
1857 } while (exception.retry);
1858 return err;
1859}
1860
1861/*
1862 * Got race?
1863 * We will need to arrange for the VFS layer to provide an atomic open.
1864 * Until then, this create/open method is prone to inefficiency and race
1865 * conditions due to the lookup, create, and open VFS calls from sys_open()
1866 * placed on the wire.
1867 *
1868 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1869 * The file will be opened again in the subsequent VFS open call
1870 * (nfs4_proc_file_open).
1871 *
1872 * The open for read will just hang around to be used by any process that
1873 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1874 */
1875
1876static int
1877nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1878 int flags, struct nameidata *nd)
1da177e4
LT		 1879{
1880 struct nfs4_state *state;
1881 struct rpc_cred *cred;
1882 int status = 0;
1883
1f163415 1884 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1885 if (IS_ERR(cred)) {
1886 status = PTR_ERR(cred);
1887 goto out;
1888 }
1889 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1890 put_rpccred(cred);
1891 if (IS_ERR(state)) {
1892 status = PTR_ERR(state);
1893 goto out;
1894 }
24ac23ab 1895 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1896 if (flags & O_EXCL) {
1897 struct nfs_fattr fattr;
3e4f6290 1898 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1899 if (status == 0)
65e4308d 1900 nfs_setattr_update_inode(state->inode, sattr);
02a913a7
TM		 1901 }
1902 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
95cf959b 1903 status = nfs4_intent_set_file(nd, dentry, state);
02a913a7
TM		 1904 else
1905 nfs4_close_state(state, flags);
1da177e4
LT		 1906out:
1907 return status;
1908}
1909
1910static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1911{
16e42959 1912 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 1913 struct nfs4_remove_arg args = {
1914 .fh = NFS_FH(dir),
1915 .name = name,
16e42959
TM		 1916 .bitmask = server->attr_bitmask,
1917 };
1918 struct nfs_fattr dir_attr;
1919 struct nfs4_remove_res res = {
1920 .server = server,
1921 .dir_attr = &dir_attr,
1da177e4 1922 };
1da177e4
LT		 1923 struct rpc_message msg = {
1924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1925 .rpc_argp = &args,
1926 .rpc_resp = &res,
1927 };
1928 int status;
1929
16e42959
TM		 1930 nfs_fattr_init(res.dir_attr);
1931 status = rpc_call_sync(server->client, &msg, 0);
1932 if (status == 0) {
1933 update_changeattr(dir, &res.cinfo);
1934 nfs_post_op_update_inode(dir, res.dir_attr);
1935 }
1da177e4
LT		 1936 return status;
1937}
1938
1939static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1940{
1941 struct nfs4_exception exception = { };
1942 int err;
1943 do {
1944 err = nfs4_handle_exception(NFS_SERVER(dir),
1945 _nfs4_proc_remove(dir, name),
1946 &exception);
1947 } while (exception.retry);
1948 return err;
1949}
1950
1951struct unlink_desc {
1952 struct nfs4_remove_arg args;
16e42959
TM		 1953 struct nfs4_remove_res res;
1954 struct nfs_fattr dir_attr;
1da177e4
LT		 1955};
1956
1957static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1958 struct qstr *name)
1959{
16e42959 1960 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1da177e4
LT		 1961 struct unlink_desc *up;
1962
1963 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1964 if (!up)
1965 return -ENOMEM;
1966
1967 up->args.fh = NFS_FH(dir->d_inode);
1968 up->args.name = name;
16e42959
TM		 1969 up->args.bitmask = server->attr_bitmask;
1970 up->res.server = server;
1971 up->res.dir_attr = &up->dir_attr;
1da177e4
LT		 1972
1973 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1974 msg->rpc_argp = &up->args;
1975 msg->rpc_resp = &up->res;
1976 return 0;
1977}
1978
1979static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1980{
1981 struct rpc_message *msg = &task->tk_msg;
1982 struct unlink_desc *up;
1983
1984 if (msg->rpc_resp != NULL) {
1985 up = container_of(msg->rpc_resp, struct unlink_desc, res);
16e42959
TM		 1986 update_changeattr(dir->d_inode, &up->res.cinfo);
1987 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1da177e4
LT		 1988 kfree(up);
1989 msg->rpc_resp = NULL;
1990 msg->rpc_argp = NULL;
1991 }
1992 return 0;
1993}
1994
1995static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1996 struct inode *new_dir, struct qstr *new_name)
1997{
6caf2c82 1998 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1999 struct nfs4_rename_arg arg = {
2000 .old_dir = NFS_FH(old_dir),
2001 .new_dir = NFS_FH(new_dir),
2002 .old_name = old_name,
2003 .new_name = new_name,
6caf2c82
TM		 2004 .bitmask = server->attr_bitmask,
2005 };
2006 struct nfs_fattr old_fattr, new_fattr;
2007 struct nfs4_rename_res res = {
2008 .server = server,
2009 .old_fattr = &old_fattr,
2010 .new_fattr = &new_fattr,
1da177e4 2011 };
1da177e4
LT		 2012 struct rpc_message msg = {
2013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2014 .rpc_argp = &arg,
2015 .rpc_resp = &res,
2016 };
2017 int status;
2018
6caf2c82
TM		 2019 nfs_fattr_init(res.old_fattr);
2020 nfs_fattr_init(res.new_fattr);
2021 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2022
2023 if (!status) {
2024 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2025 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2026 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2027 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2028 }
2029 return status;
2030}
2031
2032static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2033 struct inode *new_dir, struct qstr *new_name)
2034{
2035 struct nfs4_exception exception = { };
2036 int err;
2037 do {
2038 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2039 _nfs4_proc_rename(old_dir, old_name,
2040 new_dir, new_name),
2041 &exception);
2042 } while (exception.retry);
2043 return err;
2044}
2045
2046static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2047{
91ba2eee 2048 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2049 struct nfs4_link_arg arg = {
2050 .fh = NFS_FH(inode),
2051 .dir_fh = NFS_FH(dir),
2052 .name = name,
91ba2eee
TM		 2053 .bitmask = server->attr_bitmask,
2054 };
2055 struct nfs_fattr fattr, dir_attr;
2056 struct nfs4_link_res res = {
2057 .server = server,
2058 .fattr = &fattr,
2059 .dir_attr = &dir_attr,
1da177e4 2060 };
1da177e4
LT		 2061 struct rpc_message msg = {
2062 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2063 .rpc_argp = &arg,
91ba2eee 2064 .rpc_resp = &res,
1da177e4
LT		 2065 };
2066 int status;
2067
91ba2eee
TM		 2068 nfs_fattr_init(res.fattr);
2069 nfs_fattr_init(res.dir_attr);
2070 status = rpc_call_sync(server->client, &msg, 0);
2071 if (!status) {
2072 update_changeattr(dir, &res.cinfo);
2073 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2074 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2075 }
1da177e4
LT		 2076
2077 return status;
2078}
2079
2080static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2081{
2082 struct nfs4_exception exception = { };
2083 int err;
2084 do {
2085 err = nfs4_handle_exception(NFS_SERVER(inode),
2086 _nfs4_proc_link(inode, dir, name),
2087 &exception);
2088 } while (exception.retry);
2089 return err;
2090}
2091
4f390c15 2092static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2093 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2094{
2095 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2096 struct nfs_fh fhandle;
2097 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2098 struct nfs4_create_arg arg = {
2099 .dir_fh = NFS_FH(dir),
2100 .server = server,
4f390c15 2101 .name = &dentry->d_name,
1da177e4
LT		 2102 .attrs = sattr,
2103 .ftype = NF4LNK,
2104 .bitmask = server->attr_bitmask,
2105 };
2106 struct nfs4_create_res res = {
2107 .server = server,
4f390c15
CL		 2108 .fh = &fhandle,
2109 .fattr = &fattr,
56ae19f3 2110 .dir_fattr = &dir_fattr,
1da177e4
LT		 2111 };
2112 struct rpc_message msg = {
2113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2114 .rpc_argp = &arg,
2115 .rpc_resp = &res,
2116 };
2117 int status;
2118
94a6d753 2119 if (len > NFS4_MAXPATHLEN)
1da177e4 2120 return -ENAMETOOLONG;
4f390c15 2121
94a6d753
CL		 2122 arg.u.symlink.pages = &page;
2123 arg.u.symlink.len = len;
4f390c15 2124 nfs_fattr_init(&fattr);
56ae19f3 2125 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2126
2127 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2128 if (!status) {
1da177e4 2129 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2130 nfs_post_op_update_inode(dir, res.dir_fattr);
2131 status = nfs_instantiate(dentry, &fhandle, &fattr);
2132 }
1da177e4
LT		 2133 return status;
2134}
2135
4f390c15 2136static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2137 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2138{
2139 struct nfs4_exception exception = { };
2140 int err;
2141 do {
2142 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2143 _nfs4_proc_symlink(dir, dentry, page,
2144 len, sattr),
1da177e4
LT		 2145 &exception);
2146 } while (exception.retry);
2147 return err;
2148}
2149
2150static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2151 struct iattr *sattr)
2152{
2153 struct nfs_server *server = NFS_SERVER(dir);
2154 struct nfs_fh fhandle;
56ae19f3 2155 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2156 struct nfs4_create_arg arg = {
2157 .dir_fh = NFS_FH(dir),
2158 .server = server,
2159 .name = &dentry->d_name,
2160 .attrs = sattr,
2161 .ftype = NF4DIR,
2162 .bitmask = server->attr_bitmask,
2163 };
2164 struct nfs4_create_res res = {
2165 .server = server,
2166 .fh = &fhandle,
2167 .fattr = &fattr,
56ae19f3 2168 .dir_fattr = &dir_fattr,
1da177e4
LT		 2169 };
2170 struct rpc_message msg = {
2171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2172 .rpc_argp = &arg,
2173 .rpc_resp = &res,
2174 };
2175 int status;
2176
0e574af1 2177 nfs_fattr_init(&fattr);
56ae19f3 2178 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2179
2180 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2181 if (!status) {
2182 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2183 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2184 status = nfs_instantiate(dentry, &fhandle, &fattr);
2185 }
2186 return status;
2187}
2188
2189static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2190 struct iattr *sattr)
2191{
2192 struct nfs4_exception exception = { };
2193 int err;
2194 do {
2195 err = nfs4_handle_exception(NFS_SERVER(dir),
2196 _nfs4_proc_mkdir(dir, dentry, sattr),
2197 &exception);
2198 } while (exception.retry);
2199 return err;
2200}
2201
2202static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2203 u64 cookie, struct page *page, unsigned int count, int plus)
2204{
2205 struct inode *dir = dentry->d_inode;
2206 struct nfs4_readdir_arg args = {
2207 .fh = NFS_FH(dir),
2208 .pages = &page,
2209 .pgbase = 0,
2210 .count = count,
2211 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2212 };
2213 struct nfs4_readdir_res res;
2214 struct rpc_message msg = {
2215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2216 .rpc_argp = &args,
2217 .rpc_resp = &res,
2218 .rpc_cred = cred,
2219 };
2220 int status;
2221
eadf4598
TM		 2222 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2223 dentry->d_parent->d_name.name,
2224 dentry->d_name.name,
2225 (unsigned long long)cookie);
1da177e4
LT		 2226 lock_kernel();
2227 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2228 res.pgbase = args.pgbase;
2229 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2230 if (status == 0)
2231 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2232 unlock_kernel();
eadf4598 2233 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2234 return status;
2235}
2236
2237static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2238 u64 cookie, struct page *page, unsigned int count, int plus)
2239{
2240 struct nfs4_exception exception = { };
2241 int err;
2242 do {
2243 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2244 _nfs4_proc_readdir(dentry, cred, cookie,
2245 page, count, plus),
2246 &exception);
2247 } while (exception.retry);
2248 return err;
2249}
2250
2251static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2252 struct iattr *sattr, dev_t rdev)
2253{
2254 struct nfs_server *server = NFS_SERVER(dir);
2255 struct nfs_fh fh;
56ae19f3 2256 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2257 struct nfs4_create_arg arg = {
2258 .dir_fh = NFS_FH(dir),
2259 .server = server,
2260 .name = &dentry->d_name,
2261 .attrs = sattr,
2262 .bitmask = server->attr_bitmask,
2263 };
2264 struct nfs4_create_res res = {
2265 .server = server,
2266 .fh = &fh,
2267 .fattr = &fattr,
56ae19f3 2268 .dir_fattr = &dir_fattr,
1da177e4
LT		 2269 };
2270 struct rpc_message msg = {
2271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2272 .rpc_argp = &arg,
2273 .rpc_resp = &res,
2274 };
2275 int status;
2276 int mode = sattr->ia_mode;
2277
0e574af1 2278 nfs_fattr_init(&fattr);
56ae19f3 2279 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2280
2281 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2282 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2283 if (S_ISFIFO(mode))
2284 arg.ftype = NF4FIFO;
2285 else if (S_ISBLK(mode)) {
2286 arg.ftype = NF4BLK;
2287 arg.u.device.specdata1 = MAJOR(rdev);
2288 arg.u.device.specdata2 = MINOR(rdev);
2289 }
2290 else if (S_ISCHR(mode)) {
2291 arg.ftype = NF4CHR;
2292 arg.u.device.specdata1 = MAJOR(rdev);
2293 arg.u.device.specdata2 = MINOR(rdev);
2294 }
2295 else
2296 arg.ftype = NF4SOCK;
2297
2298 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2299 if (status == 0) {
2300 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2301 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2302 status = nfs_instantiate(dentry, &fh, &fattr);
2303 }
2304 return status;
2305}
2306
2307static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2308 struct iattr *sattr, dev_t rdev)
2309{
2310 struct nfs4_exception exception = { };
2311 int err;
2312 do {
2313 err = nfs4_handle_exception(NFS_SERVER(dir),
2314 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2315 &exception);
2316 } while (exception.retry);
2317 return err;
2318}
2319
2320static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2321 struct nfs_fsstat *fsstat)
2322{
2323 struct nfs4_statfs_arg args = {
2324 .fh = fhandle,
2325 .bitmask = server->attr_bitmask,
2326 };
2327 struct rpc_message msg = {
2328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2329 .rpc_argp = &args,
2330 .rpc_resp = fsstat,
2331 };
2332
0e574af1 2333 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2334 return rpc_call_sync(server->client, &msg, 0);
2335}
2336
2337static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2338{
2339 struct nfs4_exception exception = { };
2340 int err;
2341 do {
2342 err = nfs4_handle_exception(server,
2343 _nfs4_proc_statfs(server, fhandle, fsstat),
2344 &exception);
2345 } while (exception.retry);
2346 return err;
2347}
2348
2349static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2350 struct nfs_fsinfo *fsinfo)
2351{
2352 struct nfs4_fsinfo_arg args = {
2353 .fh = fhandle,
2354 .bitmask = server->attr_bitmask,
2355 };
2356 struct rpc_message msg = {
2357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2358 .rpc_argp = &args,
2359 .rpc_resp = fsinfo,
2360 };
2361
2362 return rpc_call_sync(server->client, &msg, 0);
2363}
2364
2365static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2366{
2367 struct nfs4_exception exception = { };
2368 int err;
2369
2370 do {
2371 err = nfs4_handle_exception(server,
2372 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2373 &exception);
2374 } while (exception.retry);
2375 return err;
2376}
2377
2378static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2379{
0e574af1 2380 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2381 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2382}
2383
2384static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2385 struct nfs_pathconf *pathconf)
2386{
2387 struct nfs4_pathconf_arg args = {
2388 .fh = fhandle,
2389 .bitmask = server->attr_bitmask,
2390 };
2391 struct rpc_message msg = {
2392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2393 .rpc_argp = &args,
2394 .rpc_resp = pathconf,
2395 };
2396
2397 /* None of the pathconf attributes are mandatory to implement */
2398 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2399 memset(pathconf, 0, sizeof(*pathconf));
2400 return 0;
2401 }
2402
0e574af1 2403 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2404 return rpc_call_sync(server->client, &msg, 0);
2405}
2406
2407static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2408 struct nfs_pathconf *pathconf)
2409{
2410 struct nfs4_exception exception = { };
2411 int err;
2412
2413 do {
2414 err = nfs4_handle_exception(server,
2415 _nfs4_proc_pathconf(server, fhandle, pathconf),
2416 &exception);
2417 } while (exception.retry);
2418 return err;
2419}
2420
ec06c096 2421static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2422{
ec06c096 2423 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2424
ec06c096 2425 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2426 rpc_restart_call(task);
ec06c096 2427 return -EAGAIN;
1da177e4
LT		 2428 }
2429 if (task->tk_status > 0)
ec06c096
TM		 2430 renew_lease(server, data->timestamp);
2431 return 0;
1da177e4
LT		 2432}
2433
ec06c096 2434static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2435{
1da177e4
LT		 2436 struct rpc_message msg = {
2437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2438 .rpc_argp = &data->args,
2439 .rpc_resp = &data->res,
2440 .rpc_cred = data->cred,
2441 };
1da177e4
LT		 2442
2443 data->timestamp = jiffies;
2444
ec06c096 2445 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2446}
2447
788e7a89 2448static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2449{
1da177e4
LT		 2450 struct inode *inode = data->inode;
2451
2452 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2453 rpc_restart_call(task);
788e7a89 2454 return -EAGAIN;
1da177e4 2455 }
4f9838c7 2456 if (task->tk_status >= 0) {
1da177e4 2457 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2458 nfs_post_op_update_inode(inode, data->res.fattr);
2459 }
788e7a89 2460 return 0;
1da177e4
LT		 2461}
2462
788e7a89 2463static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2464{
1da177e4
LT		 2465 struct rpc_message msg = {
2466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2467 .rpc_argp = &data->args,
2468 .rpc_resp = &data->res,
2469 .rpc_cred = data->cred,
2470 };
2471 struct inode *inode = data->inode;
4f9838c7 2472 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2473 int stable;
1da177e4
LT		 2474
2475 if (how & FLUSH_STABLE) {
2476 if (!NFS_I(inode)->ncommit)
2477 stable = NFS_FILE_SYNC;
2478 else
2479 stable = NFS_DATA_SYNC;
2480 } else
2481 stable = NFS_UNSTABLE;
2482 data->args.stable = stable;
4f9838c7
TM		 2483 data->args.bitmask = server->attr_bitmask;
2484 data->res.server = server;
1da177e4
LT		 2485
2486 data->timestamp = jiffies;
2487
1da177e4 2488 /* Finalize the task. */
788e7a89 2489 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2490}
2491
788e7a89 2492static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2493{
1da177e4
LT		 2494 struct inode *inode = data->inode;
2495
2496 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2497 rpc_restart_call(task);
788e7a89 2498 return -EAGAIN;
1da177e4 2499 }
4f9838c7
TM		 2500 if (task->tk_status >= 0)
2501 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2502 return 0;
1da177e4
LT		 2503}
2504
788e7a89 2505static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2506{
1da177e4
LT		 2507 struct rpc_message msg = {
2508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2509 .rpc_argp = &data->args,
2510 .rpc_resp = &data->res,
2511 .rpc_cred = data->cred,
2512 };
788e7a89 2513 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2514
4f9838c7
TM		 2515 data->args.bitmask = server->attr_bitmask;
2516 data->res.server = server;
2517
788e7a89 2518 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2519}
2520
2521/*
2522 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2523 * standalone procedure for queueing an asynchronous RENEW.
2524 */
963d8fe5 2525static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2526{
adfa6f98 2527 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2528 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2529
2530 if (task->tk_status < 0) {
2531 switch (task->tk_status) {
2532 case -NFS4ERR_STALE_CLIENTID:
2533 case -NFS4ERR_EXPIRED:
2534 case -NFS4ERR_CB_PATH_DOWN:
2535 nfs4_schedule_state_recovery(clp);
2536 }
2537 return;
2538 }
2539 spin_lock(&clp->cl_lock);
2540 if (time_before(clp->cl_last_renewal,timestamp))
2541 clp->cl_last_renewal = timestamp;
2542 spin_unlock(&clp->cl_lock);
2543}
2544
963d8fe5
TM		 2545static const struct rpc_call_ops nfs4_renew_ops = {
2546 .rpc_call_done = nfs4_renew_done,
2547};
2548
adfa6f98 2549int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2550{
2551 struct rpc_message msg = {
2552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2553 .rpc_argp = clp,
b4454fe1 2554 .rpc_cred = cred,
1da177e4
LT		 2555 };
2556
2557 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2558 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2559}
2560
adfa6f98 2561int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2562{
2563 struct rpc_message msg = {
2564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2565 .rpc_argp = clp,
b4454fe1 2566 .rpc_cred = cred,
1da177e4
LT		 2567 };
2568 unsigned long now = jiffies;
2569 int status;
2570
2571 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2572 if (status < 0)
2573 return status;
2574 spin_lock(&clp->cl_lock);
2575 if (time_before(clp->cl_last_renewal,now))
2576 clp->cl_last_renewal = now;
2577 spin_unlock(&clp->cl_lock);
2578 return 0;
2579}
2580
aa1870af
BF		 2581static inline int nfs4_server_supports_acls(struct nfs_server *server)
2582{
2583 return (server->caps & NFS_CAP_ACLS)
2584 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2585 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2586}
2587
2588/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2589 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2590 * the stack.
2591 */
2592#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2593
2594static void buf_to_pages(const void *buf, size_t buflen,
2595 struct page **pages, unsigned int *pgbase)
2596{
2597 const void *p = buf;
2598
2599 *pgbase = offset_in_page(buf);
2600 p -= *pgbase;
2601 while (p < buf + buflen) {
2602 *(pages++) = virt_to_page(p);
2603 p += PAGE_CACHE_SIZE;
2604 }
2605}
2606
e50a1c2e
BF		 2607struct nfs4_cached_acl {
2608 int cached;
2609 size_t len;
3e9d4154 2610 char data[0];
e50a1c2e
BF		 2611};
2612
2613static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2614{
2615 struct nfs_inode *nfsi = NFS_I(inode);
2616
2617 spin_lock(&inode->i_lock);
2618 kfree(nfsi->nfs4_acl);
2619 nfsi->nfs4_acl = acl;
2620 spin_unlock(&inode->i_lock);
2621}
2622
2623static void nfs4_zap_acl_attr(struct inode *inode)
2624{
2625 nfs4_set_cached_acl(inode, NULL);
2626}
2627
2628static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2629{
2630 struct nfs_inode *nfsi = NFS_I(inode);
2631 struct nfs4_cached_acl *acl;
2632 int ret = -ENOENT;
2633
2634 spin_lock(&inode->i_lock);
2635 acl = nfsi->nfs4_acl;
2636 if (acl == NULL)
2637 goto out;
2638 if (buf == NULL) /* user is just asking for length */
2639 goto out_len;
2640 if (acl->cached == 0)
2641 goto out;
2642 ret = -ERANGE; /* see getxattr(2) man page */
2643 if (acl->len > buflen)
2644 goto out;
2645 memcpy(buf, acl->data, acl->len);
2646out_len:
2647 ret = acl->len;
2648out:
2649 spin_unlock(&inode->i_lock);
2650 return ret;
2651}
2652
2653static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2654{
2655 struct nfs4_cached_acl *acl;
2656
2657 if (buf && acl_len <= PAGE_SIZE) {
2658 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2659 if (acl == NULL)
2660 goto out;
2661 acl->cached = 1;
2662 memcpy(acl->data, buf, acl_len);
2663 } else {
2664 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2665 if (acl == NULL)
2666 goto out;
2667 acl->cached = 0;
2668 }
2669 acl->len = acl_len;
2670out:
2671 nfs4_set_cached_acl(inode, acl);
2672}
2673
16b4289c 2674static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2675{
aa1870af
BF		 2676 struct page *pages[NFS4ACL_MAXPAGES];
2677 struct nfs_getaclargs args = {
2678 .fh = NFS_FH(inode),
2679 .acl_pages = pages,
2680 .acl_len = buflen,
2681 };
2682 size_t resp_len = buflen;
e50a1c2e 2683 void *resp_buf;
aa1870af
BF		 2684 struct rpc_message msg = {
2685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2686 .rpc_argp = &args,
2687 .rpc_resp = &resp_len,
2688 };
e50a1c2e 2689 struct page *localpage = NULL;
aa1870af
BF		 2690 int ret;
2691
e50a1c2e
BF		 2692 if (buflen < PAGE_SIZE) {
2693 /* As long as we're doing a round trip to the server anyway,
2694 * let's be prepared for a page of acl data. */
2695 localpage = alloc_page(GFP_KERNEL);
2696 resp_buf = page_address(localpage);
2697 if (localpage == NULL)
2698 return -ENOMEM;
2699 args.acl_pages[0] = localpage;
2700 args.acl_pgbase = 0;
1d95db8e 2701 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2702 } else {
2703 resp_buf = buf;
2704 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2705 }
aa1870af 2706 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2707 if (ret)
2708 goto out_free;
2709 if (resp_len > args.acl_len)
2710 nfs4_write_cached_acl(inode, NULL, resp_len);
2711 else
2712 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2713 if (buf) {
2714 ret = -ERANGE;
2715 if (resp_len > buflen)
2716 goto out_free;
2717 if (localpage)
2718 memcpy(buf, resp_buf, resp_len);
2719 }
2720 ret = resp_len;
2721out_free:
2722 if (localpage)
2723 __free_page(localpage);
aa1870af
BF		 2724 return ret;
2725}
2726
16b4289c
TM		 2727static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2728{
2729 struct nfs4_exception exception = { };
2730 ssize_t ret;
2731 do {
2732 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2733 if (ret >= 0)
2734 break;
2735 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2736 } while (exception.retry);
2737 return ret;
2738}
2739
e50a1c2e
BF		 2740static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2741{
2742 struct nfs_server *server = NFS_SERVER(inode);
2743 int ret;
2744
2745 if (!nfs4_server_supports_acls(server))
2746 return -EOPNOTSUPP;
2747 ret = nfs_revalidate_inode(server, inode);
2748 if (ret < 0)
2749 return ret;
2750 ret = nfs4_read_cached_acl(inode, buf, buflen);
2751 if (ret != -ENOENT)
2752 return ret;
2753 return nfs4_get_acl_uncached(inode, buf, buflen);
2754}
2755
16b4289c 2756static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2757{
2758 struct nfs_server *server = NFS_SERVER(inode);
2759 struct page *pages[NFS4ACL_MAXPAGES];
2760 struct nfs_setaclargs arg = {
2761 .fh = NFS_FH(inode),
2762 .acl_pages = pages,
2763 .acl_len = buflen,
2764 };
2765 struct rpc_message msg = {
2766 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2767 .rpc_argp = &arg,
2768 .rpc_resp = NULL,
2769 };
2770 int ret;
2771
2772 if (!nfs4_server_supports_acls(server))
2773 return -EOPNOTSUPP;
642ac549 2774 nfs_inode_return_delegation(inode);
4b580ee3 2775 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2776 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2777 if (ret == 0)
2778 nfs4_write_cached_acl(inode, buf, buflen);
4b580ee3
BF		 2779 return ret;
2780}
2781
16b4289c
TM		 2782static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2783{
2784 struct nfs4_exception exception = { };
2785 int err;
2786 do {
2787 err = nfs4_handle_exception(NFS_SERVER(inode),
2788 __nfs4_proc_set_acl(inode, buf, buflen),
2789 &exception);
2790 } while (exception.retry);
2791 return err;
2792}
2793
1da177e4 2794static int
faf5f49c 2795nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2796{
7539bbab 2797 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2798
2799 if (!clp || task->tk_status >= 0)
2800 return 0;
2801 switch(task->tk_status) {
2802 case -NFS4ERR_STALE_CLIENTID:
2803 case -NFS4ERR_STALE_STATEID:
2804 case -NFS4ERR_EXPIRED:
2805 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2806 nfs4_schedule_state_recovery(clp);
433fbe4c 2807 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2808 rpc_wake_up_task(task);
2809 task->tk_status = 0;
2810 return -EAGAIN;
1da177e4 2811 case -NFS4ERR_DELAY:
006ea73e
CL		 2812 nfs_inc_server_stats((struct nfs_server *) server,
2813 NFSIOS_DELAY);
2814 case -NFS4ERR_GRACE:
1da177e4
LT		 2815 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2816 task->tk_status = 0;
2817 return -EAGAIN;
2818 case -NFS4ERR_OLD_STATEID:
2819 task->tk_status = 0;
2820 return -EAGAIN;
2821 }
2822 task->tk_status = nfs4_map_errors(task->tk_status);
2823 return 0;
2824}
2825
433fbe4c
TM		 2826static int nfs4_wait_bit_interruptible(void *word)
2827{
2828 if (signal_pending(current))
2829 return -ERESTARTSYS;
2830 schedule();
2831 return 0;
2832}
2833
adfa6f98 2834static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2835{
1da177e4 2836 sigset_t oldset;
433fbe4c 2837 int res;
1da177e4
LT		 2838
2839 might_sleep();
2840
2841 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2842 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2843 nfs4_wait_bit_interruptible,
2844 TASK_INTERRUPTIBLE);
1da177e4
LT		 2845 rpc_clnt_sigunmask(clnt, &oldset);
2846 return res;
2847}
2848
2849static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2850{
2851 sigset_t oldset;
2852 int res = 0;
2853
2854 might_sleep();
2855
2856 if (*timeout <= 0)
2857 *timeout = NFS4_POLL_RETRY_MIN;
2858 if (*timeout > NFS4_POLL_RETRY_MAX)
2859 *timeout = NFS4_POLL_RETRY_MAX;
2860 rpc_clnt_sigmask(clnt, &oldset);
2861 if (clnt->cl_intr) {
041e0e3b 2862 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2863 if (signalled())
2864 res = -ERESTARTSYS;
041e0e3b
NA		 2865 } else
2866 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2867 rpc_clnt_sigunmask(clnt, &oldset);
2868 *timeout <<= 1;
2869 return res;
2870}
2871
2872/* This is the error handling routine for processes that are allowed
2873 * to sleep.
2874 */
faf5f49c 2875int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2876{
7539bbab 2877 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2878 int ret = errorcode;
2879
2880 exception->retry = 0;
2881 switch(errorcode) {
2882 case 0:
2883 return 0;
2884 case -NFS4ERR_STALE_CLIENTID:
2885 case -NFS4ERR_STALE_STATEID:
2886 case -NFS4ERR_EXPIRED:
433fbe4c 2887 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2888 ret = nfs4_wait_clnt_recover(server->client, clp);
2889 if (ret == 0)
2890 exception->retry = 1;
2891 break;
c514983d 2892 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2893 case -NFS4ERR_GRACE:
2894 case -NFS4ERR_DELAY:
2895 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2896 if (ret != 0)
2897 break;
1da177e4 2898 case -NFS4ERR_OLD_STATEID:
2c56617d 2899 exception->retry = 1;
1da177e4
LT		 2900 }
2901 /* We failed to handle the error */
2902 return nfs4_map_errors(ret);
2903}
2904
adfa6f98 2905int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2906{
2907 nfs4_verifier sc_verifier;
2908 struct nfs4_setclientid setclientid = {
2909 .sc_verifier = &sc_verifier,
2910 .sc_prog = program,
2911 };
2912 struct rpc_message msg = {
2913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2914 .rpc_argp = &setclientid,
2915 .rpc_resp = clp,
286d7d6a 2916 .rpc_cred = cred,
1da177e4 2917 };
bc4785cd 2918 __be32 *p;
1da177e4
LT		 2919 int loop = 0;
2920 int status;
2921
bc4785cd 2922 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2923 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2924 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2925
2926 for(;;) {
2927 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2928 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
24c8dbbb 2929 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
286d7d6a 2930 cred->cr_ops->cr_name,
1da177e4
LT		 2931 clp->cl_id_uniquifier);
2932 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2933 sizeof(setclientid.sc_netid), "tcp");
2934 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2935 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2936 clp->cl_ipaddr, port >> 8, port & 255);
2937
2938 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2939 if (status != -NFS4ERR_CLID_INUSE)
2940 break;
2941 if (signalled())
2942 break;
2943 if (loop++ & 1)
2944 ssleep(clp->cl_lease_time + 1);
2945 else
2946 if (++clp->cl_id_uniquifier == 0)
2947 break;
2948 }
2949 return status;
2950}
2951
adfa6f98 2952static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2953{
2954 struct nfs_fsinfo fsinfo;
2955 struct rpc_message msg = {
2956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2957 .rpc_argp = clp,
2958 .rpc_resp = &fsinfo,
286d7d6a 2959 .rpc_cred = cred,
1da177e4
LT		 2960 };
2961 unsigned long now;
2962 int status;
2963
2964 now = jiffies;
2965 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2966 if (status == 0) {
2967 spin_lock(&clp->cl_lock);
2968 clp->cl_lease_time = fsinfo.lease_time * HZ;
2969 clp->cl_last_renewal = now;
58d9714a 2970 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2971 spin_unlock(&clp->cl_lock);
2972 }
2973 return status;
2974}
2975
adfa6f98 2976int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2977{
2978 long timeout;
2979 int err;
2980 do {
2981 err = _nfs4_proc_setclientid_confirm(clp, cred);
2982 switch (err) {
2983 case 0:
2984 return err;
2985 case -NFS4ERR_RESOURCE:
2986 /* The IBM lawyers misread another document! */
2987 case -NFS4ERR_DELAY:
2988 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2989 }
2990 } while (err == 0);
2991 return err;
2992}
2993
fe650407
TM		 2994struct nfs4_delegreturndata {
2995 struct nfs4_delegreturnargs args;
fa178f29 2996 struct nfs4_delegreturnres res;
fe650407
TM		 2997 struct nfs_fh fh;
2998 nfs4_stateid stateid;
2999 struct rpc_cred *cred;
26e976a8 3000 unsigned long timestamp;
fa178f29 3001 struct nfs_fattr fattr;
fe650407
TM		 3002 int rpc_status;
3003};
3004
3005static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 3006{
fe650407 3007 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 3008 struct rpc_message msg = {
3009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 3010 .rpc_argp = &data->args,
fa178f29 3011 .rpc_resp = &data->res,
fe650407 3012 .rpc_cred = data->cred,
1da177e4 3013 };
fa178f29 3014 nfs_fattr_init(data->res.fattr);
fe650407
TM		 3015 rpc_call_setup(task, &msg, 0);
3016}
1da177e4 3017
fe650407
TM		 3018static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3019{
3020 struct nfs4_delegreturndata *data = calldata;
3021 data->rpc_status = task->tk_status;
26e976a8 3022 if (data->rpc_status == 0)
fa178f29 3023 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3024}
3025
3026static void nfs4_delegreturn_release(void *calldata)
3027{
3028 struct nfs4_delegreturndata *data = calldata;
3029
3030 put_rpccred(data->cred);
3031 kfree(calldata);
3032}
3033
c8d149f3 3034static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3035 .rpc_call_prepare = nfs4_delegreturn_prepare,
3036 .rpc_call_done = nfs4_delegreturn_done,
3037 .rpc_release = nfs4_delegreturn_release,
3038};
3039
3040static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3041{
3042 struct nfs4_delegreturndata *data;
fa178f29 3043 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 3044 struct rpc_task *task;
3045 int status;
3046
3047 data = kmalloc(sizeof(*data), GFP_KERNEL);
3048 if (data == NULL)
3049 return -ENOMEM;
3050 data->args.fhandle = &data->fh;
3051 data->args.stateid = &data->stateid;
fa178f29 3052 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3053 nfs_copy_fh(&data->fh, NFS_FH(inode));
3054 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3055 data->res.fattr = &data->fattr;
3056 data->res.server = server;
fe650407 3057 data->cred = get_rpccred(cred);
26e976a8 3058 data->timestamp = jiffies;
fe650407
TM		 3059 data->rpc_status = 0;
3060
3061 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 3062 if (IS_ERR(task))
fe650407 3063 return PTR_ERR(task);
fe650407 3064 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 3065 if (status == 0) {
fe650407 3066 status = data->rpc_status;
fa178f29
TM		 3067 if (status == 0)
3068 nfs_post_op_update_inode(inode, &data->fattr);
3069 }
fe650407
TM		 3070 rpc_release_task(task);
3071 return status;
1da177e4
LT		 3072}
3073
3074int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3075{
3076 struct nfs_server *server = NFS_SERVER(inode);
3077 struct nfs4_exception exception = { };
3078 int err;
3079 do {
3080 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3081 switch (err) {
3082 case -NFS4ERR_STALE_STATEID:
3083 case -NFS4ERR_EXPIRED:
7539bbab 3084 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 3085 case 0:
3086 return 0;
3087 }
3088 err = nfs4_handle_exception(server, err, &exception);
3089 } while (exception.retry);
3090 return err;
3091}
3092
3093#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3094#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3095
3096/*
3097 * sleep, with exponential backoff, and retry the LOCK operation.
3098 */
3099static unsigned long
3100nfs4_set_lock_task_retry(unsigned long timeout)
3101{
041e0e3b 3102 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3103 timeout <<= 1;
3104 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3105 return NFS4_LOCK_MAXTIMEOUT;
3106 return timeout;
3107}
3108
1da177e4
LT		 3109static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3110{
3111 struct inode *inode = state->inode;
3112 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3113 struct nfs_client *clp = server->nfs_client;
911d1aaf 3114 struct nfs_lockt_args arg = {
1da177e4 3115 .fh = NFS_FH(inode),
911d1aaf 3116 .fl = request,
1da177e4 3117 };
911d1aaf
TM		 3118 struct nfs_lockt_res res = {
3119 .denied = request,
1da177e4
LT		 3120 };
3121 struct rpc_message msg = {
3122 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3123 .rpc_argp = &arg,
3124 .rpc_resp = &res,
3125 .rpc_cred = state->owner->so_cred,
3126 };
1da177e4
LT		 3127 struct nfs4_lock_state *lsp;
3128 int status;
3129
3130 down_read(&clp->cl_sem);
911d1aaf 3131 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3132 status = nfs4_set_lock_state(state, request);
3133 if (status != 0)
3134 goto out;
3135 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3136 arg.lock_owner.id = lsp->ls_id;
1da177e4 3137 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3138 switch (status) {
3139 case 0:
3140 request->fl_type = F_UNLCK;
3141 break;
3142 case -NFS4ERR_DENIED:
3143 status = 0;
1da177e4 3144 }
8d0a8a9d 3145out:
1da177e4
LT		 3146 up_read(&clp->cl_sem);
3147 return status;
3148}
3149
3150static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3151{
3152 struct nfs4_exception exception = { };
3153 int err;
3154
3155 do {
3156 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3157 _nfs4_proc_getlk(state, cmd, request),
3158 &exception);
3159 } while (exception.retry);
3160 return err;
3161}
3162
3163static int do_vfs_lock(struct file *file, struct file_lock *fl)
3164{
3165 int res = 0;
3166 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3167 case FL_POSIX:
3168 res = posix_lock_file_wait(file, fl);
3169 break;
3170 case FL_FLOCK:
3171 res = flock_lock_file_wait(file, fl);
3172 break;
3173 default:
3174 BUG();
3175 }
1da177e4
LT		 3176 return res;
3177}
3178
faf5f49c 3179struct nfs4_unlockdata {
911d1aaf
TM		 3180 struct nfs_locku_args arg;
3181 struct nfs_locku_res res;
faf5f49c
TM		 3182 struct nfs4_lock_state *lsp;
3183 struct nfs_open_context *ctx;
911d1aaf
TM		 3184 struct file_lock fl;
3185 const struct nfs_server *server;
26e976a8 3186 unsigned long timestamp;
faf5f49c
TM		 3187};
3188
911d1aaf
TM		 3189static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3190 struct nfs_open_context *ctx,
3191 struct nfs4_lock_state *lsp,
3192 struct nfs_seqid *seqid)
3193{
3194 struct nfs4_unlockdata *p;
3195 struct inode *inode = lsp->ls_state->inode;
3196
3197 p = kmalloc(sizeof(*p), GFP_KERNEL);
3198 if (p == NULL)
3199 return NULL;
3200 p->arg.fh = NFS_FH(inode);
3201 p->arg.fl = &p->fl;
3202 p->arg.seqid = seqid;
3203 p->arg.stateid = &lsp->ls_stateid;
3204 p->lsp = lsp;
3205 atomic_inc(&lsp->ls_count);
3206 /* Ensure we don't close file until we're done freeing locks! */
3207 p->ctx = get_nfs_open_context(ctx);
3208 memcpy(&p->fl, fl, sizeof(p->fl));
3209 p->server = NFS_SERVER(inode);
3210 return p;
3211}
3212
06f814a3 3213static void nfs4_locku_release_calldata(void *data)
faf5f49c 3214{
963d8fe5 3215 struct nfs4_unlockdata *calldata = data;
911d1aaf 3216 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3217 nfs4_put_lock_state(calldata->lsp);
3218 put_nfs_open_context(calldata->ctx);
3219 kfree(calldata);
faf5f49c
TM		 3220}
3221
963d8fe5 3222static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3223{
963d8fe5 3224 struct nfs4_unlockdata *calldata = data;
faf5f49c 3225
06f814a3
TM		 3226 if (RPC_ASSASSINATED(task))
3227 return;
911d1aaf 3228 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3229 switch (task->tk_status) {
3230 case 0:
3231 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3232 calldata->res.stateid.data,
faf5f49c 3233 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3234 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3235 break;
3236 case -NFS4ERR_STALE_STATEID:
3237 case -NFS4ERR_EXPIRED:
7539bbab 3238 nfs4_schedule_state_recovery(calldata->server->nfs_client);
faf5f49c
TM		 3239 break;
3240 default:
911d1aaf 3241 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
faf5f49c 3242 rpc_restart_call(task);
faf5f49c
TM		 3243 }
3244 }
faf5f49c
TM		 3245}
3246
4ce70ada 3247static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3248{
4ce70ada 3249 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3250 struct rpc_message msg = {
3251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3252 .rpc_argp = &calldata->arg,
3253 .rpc_resp = &calldata->res,
3254 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3255 };
faf5f49c 3256
911d1aaf 3257 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3258 return;
3259 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3260 /* Note: exit _without_ running nfs4_locku_done */
3261 task->tk_action = NULL;
faf5f49c
TM		 3262 return;
3263 }
26e976a8 3264 calldata->timestamp = jiffies;
faf5f49c
TM		 3265 rpc_call_setup(task, &msg, 0);
3266}
3267
963d8fe5 3268static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3269 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3270 .rpc_call_done = nfs4_locku_done,
06f814a3 3271 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3272};
3273
a5d16a4d
TM		 3274static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3275 struct nfs_open_context *ctx,
3276 struct nfs4_lock_state *lsp,
3277 struct nfs_seqid *seqid)
3278{
3279 struct nfs4_unlockdata *data;
a5d16a4d
TM		 3280
3281 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3282 if (data == NULL) {
3283 nfs_free_seqid(seqid);
3284 return ERR_PTR(-ENOMEM);
3285 }
3286
7a1218a2 3287 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM		 3288}
3289
faf5f49c
TM		 3290static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3291{
911d1aaf 3292 struct nfs_seqid *seqid;
1da177e4 3293 struct nfs4_lock_state *lsp;
06f814a3
TM		 3294 struct rpc_task *task;
3295 int status = 0;
faf5f49c 3296
8d0a8a9d 3297 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3298 /* Unlock _before_ we do the RPC call */
3299 request->fl_flags |= FL_EXISTS;
3300 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3301 goto out;
8d0a8a9d 3302 if (status != 0)
9b073574
TM		 3303 goto out;
3304 /* Is this a delegated lock? */
3305 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3306 goto out;
8d0a8a9d 3307 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3308 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3309 status = -ENOMEM;
911d1aaf 3310 if (seqid == NULL)
9b073574 3311 goto out;
a5d16a4d
TM		 3312 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3313 status = PTR_ERR(task);
3314 if (IS_ERR(task))
9b073574 3315 goto out;
a5d16a4d
TM		 3316 status = nfs4_wait_for_completion_rpc_task(task);
3317 rpc_release_task(task);
9b073574 3318out:
1da177e4
LT		 3319 return status;
3320}
3321
a5d16a4d
TM		 3322struct nfs4_lockdata {
3323 struct nfs_lock_args arg;
3324 struct nfs_lock_res res;
3325 struct nfs4_lock_state *lsp;
3326 struct nfs_open_context *ctx;
3327 struct file_lock fl;
26e976a8 3328 unsigned long timestamp;
a5d16a4d
TM		 3329 int rpc_status;
3330 int cancelled;
3331};
3332
3333static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3334 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3335{
a5d16a4d
TM		 3336 struct nfs4_lockdata *p;
3337 struct inode *inode = lsp->ls_state->inode;
1da177e4 3338 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3339
3340 p = kzalloc(sizeof(*p), GFP_KERNEL);
3341 if (p == NULL)
3342 return NULL;
3343
3344 p->arg.fh = NFS_FH(inode);
3345 p->arg.fl = &p->fl;
3346 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3347 if (p->arg.lock_seqid == NULL)
3348 goto out_free;
3349 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3350 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
a5d16a4d
TM		 3351 p->arg.lock_owner.id = lsp->ls_id;
3352 p->lsp = lsp;
3353 atomic_inc(&lsp->ls_count);
3354 p->ctx = get_nfs_open_context(ctx);
3355 memcpy(&p->fl, fl, sizeof(p->fl));
3356 return p;
3357out_free:
3358 kfree(p);
3359 return NULL;
3360}
3361
3362static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3363{
3364 struct nfs4_lockdata *data = calldata;
3365 struct nfs4_state *state = data->lsp->ls_state;
3366 struct nfs4_state_owner *sp = state->owner;
1da177e4 3367 struct rpc_message msg = {
a5d16a4d
TM		 3368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3369 .rpc_argp = &data->arg,
3370 .rpc_resp = &data->res,
3371 .rpc_cred = sp->so_cred,
1da177e4 3372 };
06735b34 3373
a5d16a4d
TM		 3374 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3375 return;
3376 dprintk("%s: begin!\n", __FUNCTION__);
3377 /* Do we need to do an open_to_lock_owner? */
3378 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3379 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3380 if (data->arg.open_seqid == NULL) {
3381 data->rpc_status = -ENOMEM;
3382 task->tk_action = NULL;
06735b34 3383 goto out;
8d0a8a9d 3384 }
a5d16a4d
TM		 3385 data->arg.open_stateid = &state->stateid;
3386 data->arg.new_lock_owner = 1;
3387 }
26e976a8 3388 data->timestamp = jiffies;
a5d16a4d 3389 rpc_call_setup(task, &msg, 0);
06735b34 3390out:
a5d16a4d
TM		 3391 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3392}
3393
3394static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3395{
3396 struct nfs4_lockdata *data = calldata;
3397
3398 dprintk("%s: begin!\n", __FUNCTION__);
3399
3400 data->rpc_status = task->tk_status;
3401 if (RPC_ASSASSINATED(task))
3402 goto out;
3403 if (data->arg.new_lock_owner != 0) {
3404 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3405 if (data->rpc_status == 0)
3406 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3407 else
3408 goto out;
3409 }
3410 if (data->rpc_status == 0) {
3411 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3412 sizeof(data->lsp->ls_stateid.data));
3413 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
26e976a8 3414 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3415 }
3416 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3417out:
3418 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3419}
3420
3421static void nfs4_lock_release(void *calldata)
3422{
3423 struct nfs4_lockdata *data = calldata;
3424
3425 dprintk("%s: begin!\n", __FUNCTION__);
3426 if (data->arg.open_seqid != NULL)
3427 nfs_free_seqid(data->arg.open_seqid);
3428 if (data->cancelled != 0) {
3429 struct rpc_task *task;
3430 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3431 data->arg.lock_seqid);
3432 if (!IS_ERR(task))
3433 rpc_release_task(task);
3434 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3435 } else
3436 nfs_free_seqid(data->arg.lock_seqid);
3437 nfs4_put_lock_state(data->lsp);
3438 put_nfs_open_context(data->ctx);
3439 kfree(data);
3440 dprintk("%s: done!\n", __FUNCTION__);
3441}
3442
3443static const struct rpc_call_ops nfs4_lock_ops = {
3444 .rpc_call_prepare = nfs4_lock_prepare,
3445 .rpc_call_done = nfs4_lock_done,
3446 .rpc_release = nfs4_lock_release,
3447};
3448
3449static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3450{
3451 struct nfs4_lockdata *data;
3452 struct rpc_task *task;
3453 int ret;
3454
3455 dprintk("%s: begin!\n", __FUNCTION__);
3456 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3457 fl->fl_u.nfs4_fl.owner);
3458 if (data == NULL)
3459 return -ENOMEM;
3460 if (IS_SETLKW(cmd))
3461 data->arg.block = 1;
3462 if (reclaim != 0)
3463 data->arg.reclaim = 1;
3464 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3465 &nfs4_lock_ops, data);
7a1218a2 3466 if (IS_ERR(task))
a5d16a4d 3467 return PTR_ERR(task);
a5d16a4d
TM		 3468 ret = nfs4_wait_for_completion_rpc_task(task);
3469 if (ret == 0) {
3470 ret = data->rpc_status;
3471 if (ret == -NFS4ERR_DENIED)
3472 ret = -EAGAIN;
3473 } else
3474 data->cancelled = 1;
3475 rpc_release_task(task);
3476 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3477 return ret;
1da177e4
LT		 3478}
3479
3480static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3481{
202b50dc
TM		 3482 struct nfs_server *server = NFS_SERVER(state->inode);
3483 struct nfs4_exception exception = { };
3484 int err;
3485
3486 do {
42a2d13e
TM		 3487 /* Cache the lock if possible... */
3488 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3489 return 0;
202b50dc
TM		 3490 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3491 if (err != -NFS4ERR_DELAY)
3492 break;
3493 nfs4_handle_exception(server, err, &exception);
3494 } while (exception.retry);
3495 return err;
1da177e4
LT		 3496}
3497
3498static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3499{
202b50dc
TM		 3500 struct nfs_server *server = NFS_SERVER(state->inode);
3501 struct nfs4_exception exception = { };
3502 int err;
3503
6bfc93ef
TM		 3504 err = nfs4_set_lock_state(state, request);
3505 if (err != 0)
3506 return err;
202b50dc 3507 do {
42a2d13e
TM		 3508 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3509 return 0;
202b50dc
TM		 3510 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3511 if (err != -NFS4ERR_DELAY)
3512 break;
3513 nfs4_handle_exception(server, err, &exception);
3514 } while (exception.retry);
3515 return err;
1da177e4
LT		 3516}
3517
3518static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3519{
adfa6f98 3520 struct nfs_client *clp = state->owner->so_client;
01c3b861 3521 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3522 int status;
3523
6bfc93ef 3524 /* Is this a delegated open? */
6bfc93ef
TM		 3525 status = nfs4_set_lock_state(state, request);
3526 if (status != 0)
3527 goto out;
01c3b861
TM		 3528 request->fl_flags |= FL_ACCESS;
3529 status = do_vfs_lock(request->fl_file, request);
3530 if (status < 0)
3531 goto out;
3532 down_read(&clp->cl_sem);
3533 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3534 struct nfs_inode *nfsi = NFS_I(state->inode);
3535 /* Yes: cache locks! */
3536 down_read(&nfsi->rwsem);
3537 /* ...but avoid races with delegation recall... */
3538 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3539 request->fl_flags = fl_flags & ~FL_SLEEP;
3540 status = do_vfs_lock(request->fl_file, request);
3541 up_read(&nfsi->rwsem);
3542 goto out_unlock;
3543 }
3544 up_read(&nfsi->rwsem);
3545 }
6bfc93ef
TM		 3546 status = _nfs4_do_setlk(state, cmd, request, 0);
3547 if (status != 0)
01c3b861 3548 goto out_unlock;
6bfc93ef 3549 /* Note: we always want to sleep here! */
01c3b861 3550 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3551 if (do_vfs_lock(request->fl_file, request) < 0)
3552 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3553out_unlock:
1da177e4 3554 up_read(&clp->cl_sem);
01c3b861
TM		 3555out:
3556 request->fl_flags = fl_flags;
1da177e4
LT		 3557 return status;
3558}
3559
3560static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3561{
3562 struct nfs4_exception exception = { };
3563 int err;
3564
3565 do {
3566 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3567 _nfs4_proc_setlk(state, cmd, request),
3568 &exception);
3569 } while (exception.retry);
3570 return err;
3571}
3572
3573static int
3574nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3575{
3576 struct nfs_open_context *ctx;
3577 struct nfs4_state *state;
3578 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3579 int status;
3580
3581 /* verify open state */
3582 ctx = (struct nfs_open_context *)filp->private_data;
3583 state = ctx->state;
3584
3585 if (request->fl_start < 0 || request->fl_end < 0)
3586 return -EINVAL;
3587
3588 if (IS_GETLK(cmd))
3589 return nfs4_proc_getlk(state, F_GETLK, request);
3590
3591 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3592 return -EINVAL;
3593
3594 if (request->fl_type == F_UNLCK)
3595 return nfs4_proc_unlck(state, cmd, request);
3596
3597 do {
3598 status = nfs4_proc_setlk(state, cmd, request);
3599 if ((status != -EAGAIN) || IS_SETLK(cmd))
3600 break;
3601 timeout = nfs4_set_lock_task_retry(timeout);
3602 status = -ERESTARTSYS;
3603 if (signalled())
3604 break;
3605 } while(status < 0);
1da177e4
LT		 3606 return status;
3607}
3608
888e694c
TM		 3609int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3610{
3611 struct nfs_server *server = NFS_SERVER(state->inode);
3612 struct nfs4_exception exception = { };
3613 int err;
3614
3615 err = nfs4_set_lock_state(state, fl);
3616 if (err != 0)
3617 goto out;
3618 do {
3619 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3620 if (err != -NFS4ERR_DELAY)
3621 break;
3622 err = nfs4_handle_exception(server, err, &exception);
3623 } while (exception.retry);
3624out:
3625 return err;
3626}
6b3b5496 3627
aa1870af
BF		 3628#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3629
6b3b5496
BF		 3630int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3631 size_t buflen, int flags)
3632{
4b580ee3
BF		 3633 struct inode *inode = dentry->d_inode;
3634
3635 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3636 return -EOPNOTSUPP;
3637
3638 if (!S_ISREG(inode->i_mode) &&
3639 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3640 return -EPERM;
3641
3642 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3643}
3644
3645/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3646 * and that's what we'll do for e.g. user attributes that haven't been set.
3647 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3648 * attributes in kernel-managed attribute namespaces. */
3649ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3650 size_t buflen)
3651{
aa1870af
BF		 3652 struct inode *inode = dentry->d_inode;
3653
3654 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3655 return -EOPNOTSUPP;
3656
3657 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3658}
3659
3660ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3661{
aa1870af 3662 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3663
096455a2
BF		 3664 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3665 return 0;
6b3b5496
BF		 3666 if (buf && buflen < len)
3667 return -ERANGE;
3668 if (buf)
aa1870af
BF		 3669 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3670 return len;
6b3b5496
BF		 3671}
3672
683b57b4 3673int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
7aaa0b3b 3674 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3675{
3676 struct nfs_server *server = NFS_SERVER(dir);
3677 u32 bitmask[2] = {
361e624f
MN		 3678 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3679 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3680 };
3681 struct nfs4_fs_locations_arg args = {
3682 .dir_fh = NFS_FH(dir),
3683 .name = &dentry->d_name,
3684 .page = page,
3685 .bitmask = bitmask,
3686 };
3687 struct rpc_message msg = {
3688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3689 .rpc_argp = &args,
7aaa0b3b 3690 .rpc_resp = fs_locations,
683b57b4
TM		 3691 };
3692 int status;
3693
3694 dprintk("%s: start\n", __FUNCTION__);
3695 fs_locations->fattr.valid = 0;
3696 fs_locations->server = server;
830b8e33 3697 fs_locations->nlocations = 0;
683b57b4
TM		 3698 status = rpc_call_sync(server->client, &msg, 0);
3699 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3700 return status;
3701}
3702
1da177e4
LT		 3703struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3704 .recover_open = nfs4_open_reclaim,
3705 .recover_lock = nfs4_lock_reclaim,
3706};
3707
3708struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3709 .recover_open = nfs4_open_expired,
3710 .recover_lock = nfs4_lock_expired,
3711};
3712
6b3b5496
BF		 3713static struct inode_operations nfs4_file_inode_operations = {
3714 .permission = nfs_permission,
3715 .getattr = nfs_getattr,
3716 .setattr = nfs_setattr,
3717 .getxattr = nfs4_getxattr,
3718 .setxattr = nfs4_setxattr,
3719 .listxattr = nfs4_listxattr,
3720};
3721
509de811 3722const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3723 .version = 4, /* protocol version */
3724 .dentry_ops = &nfs4_dentry_operations,
3725 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3726 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3727 .getroot = nfs4_proc_get_root,
3728 .getattr = nfs4_proc_getattr,
3729 .setattr = nfs4_proc_setattr,
2b3de441 3730 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3731 .lookup = nfs4_proc_lookup,
3732 .access = nfs4_proc_access,
3733 .readlink = nfs4_proc_readlink,
3734 .read = nfs4_proc_read,
3735 .write = nfs4_proc_write,
3736 .commit = nfs4_proc_commit,
3737 .create = nfs4_proc_create,
3738 .remove = nfs4_proc_remove,
3739 .unlink_setup = nfs4_proc_unlink_setup,
3740 .unlink_done = nfs4_proc_unlink_done,
3741 .rename = nfs4_proc_rename,
3742 .link = nfs4_proc_link,
3743 .symlink = nfs4_proc_symlink,
3744 .mkdir = nfs4_proc_mkdir,
3745 .rmdir = nfs4_proc_remove,
3746 .readdir = nfs4_proc_readdir,
3747 .mknod = nfs4_proc_mknod,
3748 .statfs = nfs4_proc_statfs,
3749 .fsinfo = nfs4_proc_fsinfo,
3750 .pathconf = nfs4_proc_pathconf,
e9326dca 3751 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3752 .decode_dirent = nfs4_decode_dirent,
3753 .read_setup = nfs4_proc_read_setup,
ec06c096 3754 .read_done = nfs4_read_done,
1da177e4 3755 .write_setup = nfs4_proc_write_setup,
788e7a89 3756 .write_done = nfs4_write_done,
1da177e4 3757 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3758 .commit_done = nfs4_commit_done,
02a913a7
TM		 3759 .file_open = nfs_open,
3760 .file_release = nfs_release,
1da177e4 3761 .lock = nfs4_proc_lock,
e50a1c2e 3762 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3763};
3764
3765/*
3766 * Local variables:
3767 * c-basic-offset: 8
3768 * End:
3769 */
Linux 6.x block layer and io_uring tree(s)