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