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lockd: Remove FL_LOCKD flag
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
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1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
006ea73e 54#include "iostat.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
58#define NFS4_POLL_RETRY_MIN (1*HZ)
59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
cdd4e68b 61struct nfs4_opendata;
864472e9 62static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 63static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 64static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
1da177e4 65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
faf5f49c 66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
58d9714a 67static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp);
1da177e4
LT		 68extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
69extern struct rpc_procinfo nfs4_procedures[];
70
1da177e4
LT		 71/* Prevent leaks of NFSv4 errors into userland */
72int nfs4_map_errors(int err)
73{
74 if (err < -1000) {
75 dprintk("%s could not handle NFSv4 error %d\n",
76 __FUNCTION__, -err);
77 return -EIO;
78 }
79 return err;
80}
81
82/*
83 * This is our standard bitmap for GETATTR requests.
84 */
85const u32 nfs4_fattr_bitmap[2] = {
86 FATTR4_WORD0_TYPE
87 | FATTR4_WORD0_CHANGE
88 | FATTR4_WORD0_SIZE
89 | FATTR4_WORD0_FSID
90 | FATTR4_WORD0_FILEID,
91 FATTR4_WORD1_MODE
92 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER
94 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_RAWDEV
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
100};
101
102const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
109};
110
4ce79717 111const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 112 FATTR4_WORD0_MAXLINK
113 | FATTR4_WORD0_MAXNAME,
114 0
115};
116
117const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
121 0
122};
123
124static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
125 struct nfs4_readdir_arg *readdir)
126{
127 u32 *start, *p;
128
129 BUG_ON(readdir->count < 80);
130 if (cookie > 2) {
b7ef1956 131 readdir->cookie = cookie;
1da177e4
LT		 132 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
133 return;
134 }
135
136 readdir->cookie = 0;
137 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
138 if (cookie == 2)
139 return;
140
141 /*
142 * NFSv4 servers do not return entries for '.' and '..'
143 * Therefore, we fake these entries here. We let '.'
144 * have cookie 0 and '..' have cookie 1. Note that
145 * when talking to the server, we always send cookie 0
146 * instead of 1 or 2.
147 */
148 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
149
150 if (cookie == 0) {
151 *p++ = xdr_one; /* next */
152 *p++ = xdr_zero; /* cookie, first word */
153 *p++ = xdr_one; /* cookie, second word */
154 *p++ = xdr_one; /* entry len */
155 memcpy(p, ".\0\0\0", 4); /* entry */
156 p++;
157 *p++ = xdr_one; /* bitmap length */
158 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
159 *p++ = htonl(8); /* attribute buffer length */
160 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
161 }
162
163 *p++ = xdr_one; /* next */
164 *p++ = xdr_zero; /* cookie, first word */
165 *p++ = xdr_two; /* cookie, second word */
166 *p++ = xdr_two; /* entry len */
167 memcpy(p, "..\0\0", 4); /* entry */
168 p++;
169 *p++ = xdr_one; /* bitmap length */
170 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
171 *p++ = htonl(8); /* attribute buffer length */
172 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
173
174 readdir->pgbase = (char *)p - (char *)start;
175 readdir->count -= readdir->pgbase;
176 kunmap_atomic(start, KM_USER0);
177}
178
26e976a8 179static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4
LT		 180{
181 struct nfs4_client *clp = server->nfs4_state;
182 spin_lock(&clp->cl_lock);
183 if (time_before(clp->cl_last_renewal,timestamp))
184 clp->cl_last_renewal = timestamp;
185 spin_unlock(&clp->cl_lock);
186}
187
188static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo)
189{
190 struct nfs_inode *nfsi = NFS_I(inode);
191
decf491f
TM		 192 spin_lock(&inode->i_lock);
193 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
1da177e4
LT		 194 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
195 nfsi->change_attr = cinfo->after;
decf491f 196 spin_unlock(&inode->i_lock);
1da177e4
LT		 197}
198
e56e0b78 199struct nfs4_opendata {
24ac23ab 200 atomic_t count;
e56e0b78
TM		 201 struct nfs_openargs o_arg;
202 struct nfs_openres o_res;
cdd4e68b
TM		 203 struct nfs_open_confirmargs c_arg;
204 struct nfs_open_confirmres c_res;
e56e0b78
TM		 205 struct nfs_fattr f_attr;
206 struct nfs_fattr dir_attr;
207 struct dentry *dentry;
208 struct dentry *dir;
209 struct nfs4_state_owner *owner;
210 struct iattr attrs;
26e976a8 211 unsigned long timestamp;
24ac23ab
TM		 212 int rpc_status;
213 int cancelled;
e56e0b78
TM		 214};
215
216static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
217 struct nfs4_state_owner *sp, int flags,
218 const struct iattr *attrs)
219{
220 struct dentry *parent = dget_parent(dentry);
221 struct inode *dir = parent->d_inode;
222 struct nfs_server *server = NFS_SERVER(dir);
223 struct nfs4_opendata *p;
224
225 p = kzalloc(sizeof(*p), GFP_KERNEL);
226 if (p == NULL)
227 goto err;
228 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
229 if (p->o_arg.seqid == NULL)
230 goto err_free;
24ac23ab 231 atomic_set(&p->count, 1);
e56e0b78
TM		 232 p->dentry = dget(dentry);
233 p->dir = parent;
234 p->owner = sp;
235 atomic_inc(&sp->so_count);
236 p->o_arg.fh = NFS_FH(dir);
237 p->o_arg.open_flags = flags,
238 p->o_arg.clientid = server->nfs4_state->cl_clientid;
239 p->o_arg.id = sp->so_id;
240 p->o_arg.name = &dentry->d_name;
241 p->o_arg.server = server;
242 p->o_arg.bitmask = server->attr_bitmask;
243 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
244 p->o_res.f_attr = &p->f_attr;
245 p->o_res.dir_attr = &p->dir_attr;
246 p->o_res.server = server;
247 nfs_fattr_init(&p->f_attr);
248 nfs_fattr_init(&p->dir_attr);
249 if (flags & O_EXCL) {
250 u32 *s = (u32 *) p->o_arg.u.verifier.data;
251 s[0] = jiffies;
252 s[1] = current->pid;
253 } else if (flags & O_CREAT) {
254 p->o_arg.u.attrs = &p->attrs;
255 memcpy(&p->attrs, attrs, sizeof(p->attrs));
256 }
cdd4e68b
TM		 257 p->c_arg.fh = &p->o_res.fh;
258 p->c_arg.stateid = &p->o_res.stateid;
259 p->c_arg.seqid = p->o_arg.seqid;
e56e0b78
TM		 260 return p;
261err_free:
262 kfree(p);
263err:
264 dput(parent);
265 return NULL;
266}
267
268static void nfs4_opendata_free(struct nfs4_opendata *p)
269{
24ac23ab 270 if (p != NULL && atomic_dec_and_test(&p->count)) {
e56e0b78
TM		 271 nfs_free_seqid(p->o_arg.seqid);
272 nfs4_put_state_owner(p->owner);
273 dput(p->dir);
274 dput(p->dentry);
275 kfree(p);
276 }
277}
278
9512135d 279/* Helper for asynchronous RPC calls */
4ce70ada 280static int nfs4_call_async(struct rpc_clnt *clnt,
963d8fe5 281 const struct rpc_call_ops *tk_ops, void *calldata)
9512135d
TM		 282{
283 struct rpc_task *task;
284
963d8fe5 285 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
9512135d 286 return -ENOMEM;
9512135d
TM		 287 rpc_execute(task);
288 return 0;
289}
290
06f814a3
TM		 291static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
292{
293 sigset_t oldset;
294 int ret;
295
296 rpc_clnt_sigmask(task->tk_client, &oldset);
297 ret = rpc_wait_for_completion_task(task);
298 rpc_clnt_sigunmask(task->tk_client, &oldset);
299 return ret;
300}
301
e7616923
TM		 302static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
303{
304 switch (open_flags) {
305 case FMODE_WRITE:
306 state->n_wronly++;
307 break;
308 case FMODE_READ:
309 state->n_rdonly++;
310 break;
311 case FMODE_READ|FMODE_WRITE:
312 state->n_rdwr++;
313 }
314}
315
1da177e4
LT		 316static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
317{
318 struct inode *inode = state->inode;
319
320 open_flags &= (FMODE_READ|FMODE_WRITE);
d530838b 321 /* Protect against nfs4_find_state_byowner() */
ec073428 322 spin_lock(&state->owner->so_lock);
1da177e4 323 spin_lock(&inode->i_lock);
4cecb76f 324 memcpy(&state->stateid, stateid, sizeof(state->stateid));
e7616923 325 update_open_stateflags(state, open_flags);
4cecb76f 326 nfs4_state_set_mode_locked(state, state->state | open_flags);
1da177e4 327 spin_unlock(&inode->i_lock);
ec073428 328 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 329}
330
24ac23ab
TM		 331static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
332{
333 struct inode *inode;
334 struct nfs4_state *state = NULL;
335
336 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
337 goto out;
338 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
339 if (inode == NULL)
340 goto out;
341 state = nfs4_get_open_state(inode, data->owner);
342 if (state == NULL)
343 goto put_inode;
344 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
345put_inode:
346 iput(inode);
347out:
348 return state;
349}
350
864472e9
TM		 351static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
352{
353 struct nfs_inode *nfsi = NFS_I(state->inode);
354 struct nfs_open_context *ctx;
355
356 spin_lock(&state->inode->i_lock);
357 list_for_each_entry(ctx, &nfsi->open_files, list) {
358 if (ctx->state != state)
359 continue;
360 get_nfs_open_context(ctx);
361 spin_unlock(&state->inode->i_lock);
362 return ctx;
363 }
364 spin_unlock(&state->inode->i_lock);
365 return ERR_PTR(-ENOENT);
366}
367
368static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
369{
370 int ret;
371
372 opendata->o_arg.open_flags = openflags;
373 ret = _nfs4_proc_open(opendata);
374 if (ret != 0)
375 return ret;
376 memcpy(stateid->data, opendata->o_res.stateid.data,
377 sizeof(stateid->data));
378 return 0;
379}
380
381static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
382{
383 nfs4_stateid stateid;
384 struct nfs4_state *newstate;
385 int mode = 0;
386 int delegation = 0;
387 int ret;
388
389 /* memory barrier prior to reading state->n_* */
390 smp_rmb();
391 if (state->n_rdwr != 0) {
392 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
393 if (ret != 0)
394 return ret;
395 mode |= FMODE_READ|FMODE_WRITE;
396 if (opendata->o_res.delegation_type != 0)
397 delegation = opendata->o_res.delegation_type;
398 smp_rmb();
399 }
400 if (state->n_wronly != 0) {
401 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
402 if (ret != 0)
403 return ret;
404 mode |= FMODE_WRITE;
405 if (opendata->o_res.delegation_type != 0)
406 delegation = opendata->o_res.delegation_type;
407 smp_rmb();
408 }
409 if (state->n_rdonly != 0) {
410 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
411 if (ret != 0)
412 return ret;
413 mode |= FMODE_READ;
414 }
415 clear_bit(NFS_DELEGATED_STATE, &state->flags);
416 if (mode == 0)
417 return 0;
418 if (opendata->o_res.delegation_type == 0)
419 opendata->o_res.delegation_type = delegation;
420 opendata->o_arg.open_flags |= mode;
421 newstate = nfs4_opendata_to_nfs4_state(opendata);
422 if (newstate != NULL) {
423 if (opendata->o_res.delegation_type != 0) {
424 struct nfs_inode *nfsi = NFS_I(newstate->inode);
425 int delegation_flags = 0;
426 if (nfsi->delegation)
427 delegation_flags = nfsi->delegation->flags;
428 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
429 nfs_inode_set_delegation(newstate->inode,
430 opendata->owner->so_cred,
431 &opendata->o_res);
432 else
433 nfs_inode_reclaim_delegation(newstate->inode,
434 opendata->owner->so_cred,
435 &opendata->o_res);
436 }
437 nfs4_close_state(newstate, opendata->o_arg.open_flags);
438 }
439 if (newstate != state)
440 return -ESTALE;
441 return 0;
442}
443
1da177e4
LT		 444/*
445 * OPEN_RECLAIM:
446 * reclaim state on the server after a reboot.
1da177e4 447 */
864472e9 448static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4 449{
864472e9
TM		 450 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
451 struct nfs4_opendata *opendata;
452 int delegation_type = 0;
1da177e4
LT		 453 int status;
454
455 if (delegation != NULL) {
456 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
457 memcpy(&state->stateid, &delegation->stateid,
458 sizeof(state->stateid));
459 set_bit(NFS_DELEGATED_STATE, &state->flags);
460 return 0;
461 }
864472e9 462 delegation_type = delegation->type;
1da177e4 463 }
864472e9
TM		 464 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
465 if (opendata == NULL)
cee54fc9 466 return -ENOMEM;
864472e9
TM		 467 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
468 opendata->o_arg.fh = NFS_FH(state->inode);
469 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
470 opendata->o_arg.u.delegation_type = delegation_type;
471 status = nfs4_open_recover(opendata, state);
472 nfs4_opendata_free(opendata);
1da177e4
LT		 473 return status;
474}
475
864472e9 476static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4
LT		 477{
478 struct nfs_server *server = NFS_SERVER(state->inode);
479 struct nfs4_exception exception = { };
480 int err;
481 do {
864472e9 482 err = _nfs4_do_open_reclaim(sp, state, dentry);
202b50dc
TM		 483 if (err != -NFS4ERR_DELAY)
484 break;
485 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 486 } while (exception.retry);
487 return err;
488}
489
864472e9
TM		 490static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
491{
492 struct nfs_open_context *ctx;
493 int ret;
494
495 ctx = nfs4_state_find_open_context(state);
496 if (IS_ERR(ctx))
497 return PTR_ERR(ctx);
498 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
499 put_nfs_open_context(ctx);
500 return ret;
501}
502
1da177e4
LT		 503static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
504{
505 struct nfs4_state_owner *sp = state->owner;
e56e0b78 506 struct nfs4_opendata *opendata;
864472e9 507 int ret;
1da177e4 508
1da177e4 509 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
864472e9
TM		 510 return 0;
511 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
e56e0b78 512 if (opendata == NULL)
864472e9 513 return -ENOMEM;
e56e0b78 514 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
e56e0b78
TM		 515 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
516 sizeof(opendata->o_arg.u.delegation.data));
864472e9 517 ret = nfs4_open_recover(opendata, state);
e56e0b78 518 nfs4_opendata_free(opendata);
864472e9 519 return ret;
1da177e4
LT		 520}
521
522int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
523{
524 struct nfs4_exception exception = { };
525 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
526 int err;
527 do {
528 err = _nfs4_open_delegation_recall(dentry, state);
529 switch (err) {
530 case 0:
531 return err;
532 case -NFS4ERR_STALE_CLIENTID:
533 case -NFS4ERR_STALE_STATEID:
534 case -NFS4ERR_EXPIRED:
535 /* Don't recall a delegation if it was lost */
536 nfs4_schedule_state_recovery(server->nfs4_state);
537 return err;
538 }
539 err = nfs4_handle_exception(server, err, &exception);
540 } while (exception.retry);
541 return err;
542}
543
cdd4e68b 544static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 545{
cdd4e68b
TM		 546 struct nfs4_opendata *data = calldata;
547 struct rpc_message msg = {
548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
549 .rpc_argp = &data->c_arg,
550 .rpc_resp = &data->c_res,
551 .rpc_cred = data->owner->so_cred,
1da177e4 552 };
26e976a8 553 data->timestamp = jiffies;
cdd4e68b
TM		 554 rpc_call_setup(task, &msg, 0);
555}
556
557static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
558{
559 struct nfs4_opendata *data = calldata;
560
561 data->rpc_status = task->tk_status;
562 if (RPC_ASSASSINATED(task))
563 return;
26e976a8 564 if (data->rpc_status == 0) {
cdd4e68b
TM		 565 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
566 sizeof(data->o_res.stateid.data));
26e976a8
TM		 567 renew_lease(data->o_res.server, data->timestamp);
568 }
cdd4e68b
TM		 569 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
570 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
571}
572
573static void nfs4_open_confirm_release(void *calldata)
574{
575 struct nfs4_opendata *data = calldata;
576 struct nfs4_state *state = NULL;
577
578 /* If this request hasn't been cancelled, do nothing */
579 if (data->cancelled == 0)
580 goto out_free;
581 /* In case of error, no cleanup! */
582 if (data->rpc_status != 0)
583 goto out_free;
584 nfs_confirm_seqid(&data->owner->so_seqid, 0);
585 state = nfs4_opendata_to_nfs4_state(data);
586 if (state != NULL)
587 nfs4_close_state(state, data->o_arg.open_flags);
588out_free:
589 nfs4_opendata_free(data);
590}
591
592static const struct rpc_call_ops nfs4_open_confirm_ops = {
593 .rpc_call_prepare = nfs4_open_confirm_prepare,
594 .rpc_call_done = nfs4_open_confirm_done,
595 .rpc_release = nfs4_open_confirm_release,
596};
597
598/*
599 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
600 */
601static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
602{
603 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
604 struct rpc_task *task;
1da177e4
LT		 605 int status;
606
cdd4e68b
TM		 607 atomic_inc(&data->count);
608 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
609 if (IS_ERR(task)) {
610 nfs4_opendata_free(data);
611 return PTR_ERR(task);
612 }
613 status = nfs4_wait_for_completion_rpc_task(task);
614 if (status != 0) {
615 data->cancelled = 1;
616 smp_wmb();
617 } else
618 status = data->rpc_status;
619 rpc_release_task(task);
1da177e4
LT		 620 return status;
621}
622
24ac23ab 623static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 624{
24ac23ab
TM		 625 struct nfs4_opendata *data = calldata;
626 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 627 struct rpc_message msg = {
628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 629 .rpc_argp = &data->o_arg,
630 .rpc_resp = &data->o_res,
1da177e4
LT		 631 .rpc_cred = sp->so_cred,
632 };
24ac23ab
TM		 633
634 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
635 return;
636 /* Update sequence id. */
637 data->o_arg.id = sp->so_id;
638 data->o_arg.clientid = sp->so_client->cl_clientid;
864472e9
TM		 639 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
640 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
26e976a8 641 data->timestamp = jiffies;
24ac23ab
TM		 642 rpc_call_setup(task, &msg, 0);
643}
1da177e4 644
24ac23ab
TM		 645static void nfs4_open_done(struct rpc_task *task, void *calldata)
646{
647 struct nfs4_opendata *data = calldata;
1da177e4 648
24ac23ab
TM		 649 data->rpc_status = task->tk_status;
650 if (RPC_ASSASSINATED(task))
651 return;
652 if (task->tk_status == 0) {
653 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 654 case S_IFREG:
655 break;
656 case S_IFLNK:
24ac23ab 657 data->rpc_status = -ELOOP;
6f926b5b
TM		 658 break;
659 case S_IFDIR:
24ac23ab 660 data->rpc_status = -EISDIR;
6f926b5b
TM		 661 break;
662 default:
24ac23ab 663 data->rpc_status = -ENOTDIR;
6f926b5b 664 }
26e976a8 665 renew_lease(data->o_res.server, data->timestamp);
6f926b5b 666 }
24ac23ab
TM		 667 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
668}
6f926b5b 669
24ac23ab
TM		 670static void nfs4_open_release(void *calldata)
671{
672 struct nfs4_opendata *data = calldata;
673 struct nfs4_state *state = NULL;
674
675 /* If this request hasn't been cancelled, do nothing */
676 if (data->cancelled == 0)
677 goto out_free;
678 /* In case of error, no cleanup! */
679 if (data->rpc_status != 0)
680 goto out_free;
681 /* In case we need an open_confirm, no cleanup! */
682 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
683 goto out_free;
684 nfs_confirm_seqid(&data->owner->so_seqid, 0);
685 state = nfs4_opendata_to_nfs4_state(data);
686 if (state != NULL)
687 nfs4_close_state(state, data->o_arg.open_flags);
688out_free:
689 nfs4_opendata_free(data);
690}
691
692static const struct rpc_call_ops nfs4_open_ops = {
693 .rpc_call_prepare = nfs4_open_prepare,
694 .rpc_call_done = nfs4_open_done,
695 .rpc_release = nfs4_open_release,
696};
697
698/*
699 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
700 */
701static int _nfs4_proc_open(struct nfs4_opendata *data)
702{
703 struct inode *dir = data->dir->d_inode;
704 struct nfs_server *server = NFS_SERVER(dir);
705 struct nfs_openargs *o_arg = &data->o_arg;
706 struct nfs_openres *o_res = &data->o_res;
707 struct rpc_task *task;
708 int status;
709
710 atomic_inc(&data->count);
711 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
712 if (IS_ERR(task)) {
713 nfs4_opendata_free(data);
714 return PTR_ERR(task);
715 }
716 status = nfs4_wait_for_completion_rpc_task(task);
717 if (status != 0) {
718 data->cancelled = 1;
719 smp_wmb();
720 } else
721 status = data->rpc_status;
722 rpc_release_task(task);
1da177e4 723 if (status != 0)
24ac23ab
TM		 724 return status;
725
56ae19f3
TM		 726 if (o_arg->open_flags & O_CREAT) {
727 update_changeattr(dir, &o_res->cinfo);
728 nfs_post_op_update_inode(dir, o_res->dir_attr);
729 } else
730 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 731 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 732 status = _nfs4_proc_open_confirm(data);
1da177e4 733 if (status != 0)
24ac23ab 734 return status;
1da177e4 735 }
24ac23ab 736 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1da177e4 737 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
24ac23ab
TM		 738 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
739 return 0;
1da177e4
LT		 740}
741
742static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
743{
744 struct nfs_access_entry cache;
745 int mask = 0;
746 int status;
747
748 if (openflags & FMODE_READ)
749 mask |= MAY_READ;
750 if (openflags & FMODE_WRITE)
751 mask |= MAY_WRITE;
752 status = nfs_access_get_cached(inode, cred, &cache);
753 if (status == 0)
754 goto out;
755
756 /* Be clever: ask server to check for all possible rights */
757 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
758 cache.cred = cred;
759 cache.jiffies = jiffies;
760 status = _nfs4_proc_access(inode, &cache);
761 if (status != 0)
762 return status;
763 nfs_access_add_cache(inode, &cache);
764out:
765 if ((cache.mask & mask) == mask)
766 return 0;
767 return -EACCES;
768}
769
58d9714a
TM		 770int nfs4_recover_expired_lease(struct nfs_server *server)
771{
772 struct nfs4_client *clp = server->nfs4_state;
773
774 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
775 nfs4_schedule_state_recovery(clp);
776 return nfs4_wait_clnt_recover(server->client, clp);
777}
778
1da177e4
LT		 779/*
780 * OPEN_EXPIRED:
781 * reclaim state on the server after a network partition.
782 * Assumes caller holds the appropriate lock
783 */
784static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
785{
1da177e4 786 struct inode *inode = state->inode;
1da177e4 787 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
e56e0b78 788 struct nfs4_opendata *opendata;
24ac23ab 789 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
864472e9 790 int ret;
1da177e4
LT		 791
792 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
864472e9
TM		 793 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
794 if (ret < 0)
795 return ret;
1da177e4
LT		 796 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
797 set_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9 798 return 0;
1da177e4 799 }
24ac23ab 800 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
e56e0b78 801 if (opendata == NULL)
864472e9
TM		 802 return -ENOMEM;
803 ret = nfs4_open_recover(opendata, state);
804 if (ret == -ESTALE) {
805 /* Invalidate the state owner so we don't ever use it again */
806 nfs4_drop_state_owner(sp);
807 d_drop(dentry);
1da177e4 808 }
e56e0b78 809 nfs4_opendata_free(opendata);
864472e9 810 return ret;
1da177e4
LT		 811}
812
202b50dc
TM		 813static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
814{
815 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
816 struct nfs4_exception exception = { };
817 int err;
818
819 do {
820 err = _nfs4_open_expired(sp, state, dentry);
821 if (err == -NFS4ERR_DELAY)
822 nfs4_handle_exception(server, err, &exception);
823 } while (exception.retry);
824 return err;
825}
826
1da177e4
LT		 827static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
828{
1da177e4 829 struct nfs_open_context *ctx;
864472e9 830 int ret;
1da177e4 831
864472e9
TM		 832 ctx = nfs4_state_find_open_context(state);
833 if (IS_ERR(ctx))
834 return PTR_ERR(ctx);
835 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
836 put_nfs_open_context(ctx);
837 return ret;
1da177e4
LT		 838}
839
840/*
24ac23ab 841 * Returns a referenced nfs4_state if there is an open delegation on the file
1da177e4
LT		 842 */
843static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
844{
845 struct nfs_delegation *delegation;
846 struct nfs_server *server = NFS_SERVER(inode);
847 struct nfs4_client *clp = server->nfs4_state;
848 struct nfs_inode *nfsi = NFS_I(inode);
849 struct nfs4_state_owner *sp = NULL;
850 struct nfs4_state *state = NULL;
851 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
852 int err;
853
b4454fe1
TM		 854 err = -ENOMEM;
855 if (!(sp = nfs4_get_state_owner(server, cred))) {
856 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
857 return err;
858 }
58d9714a
TM		 859 err = nfs4_recover_expired_lease(server);
860 if (err != 0)
b4454fe1 861 goto out_put_state_owner;
1da177e4
LT		 862 /* Protect against reboot recovery - NOTE ORDER! */
863 down_read(&clp->cl_sem);
864 /* Protect against delegation recall */
865 down_read(&nfsi->rwsem);
866 delegation = NFS_I(inode)->delegation;
867 err = -ENOENT;
868 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
869 goto out_err;
870 err = -ENOMEM;
1da177e4
LT		 871 state = nfs4_get_open_state(inode, sp);
872 if (state == NULL)
873 goto out_err;
874
875 err = -ENOENT;
876 if ((state->state & open_flags) == open_flags) {
877 spin_lock(&inode->i_lock);
e7616923 878 update_open_stateflags(state, open_flags);
1da177e4
LT		 879 spin_unlock(&inode->i_lock);
880 goto out_ok;
881 } else if (state->state != 0)
b4454fe1 882 goto out_put_open_state;
1da177e4
LT		 883
884 lock_kernel();
885 err = _nfs4_do_access(inode, cred, open_flags);
886 unlock_kernel();
887 if (err != 0)
b4454fe1 888 goto out_put_open_state;
1da177e4
LT		 889 set_bit(NFS_DELEGATED_STATE, &state->flags);
890 update_open_stateid(state, &delegation->stateid, open_flags);
891out_ok:
1da177e4
LT		 892 nfs4_put_state_owner(sp);
893 up_read(&nfsi->rwsem);
894 up_read(&clp->cl_sem);
1da177e4 895 *res = state;
b4454fe1
TM		 896 return 0;
897out_put_open_state:
898 nfs4_put_open_state(state);
1da177e4 899out_err:
1da177e4
LT		 900 up_read(&nfsi->rwsem);
901 up_read(&clp->cl_sem);
b8e5c4c2
TM		 902 if (err != -EACCES)
903 nfs_inode_return_delegation(inode);
b4454fe1
TM		 904out_put_state_owner:
905 nfs4_put_state_owner(sp);
1da177e4
LT		 906 return err;
907}
908
909static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
910{
911 struct nfs4_exception exception = { };
a162a6b8 912 struct nfs4_state *res = ERR_PTR(-EIO);
1da177e4
LT		 913 int err;
914
915 do {
916 err = _nfs4_open_delegated(inode, flags, cred, &res);
917 if (err == 0)
918 break;
919 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
920 err, &exception));
921 } while (exception.retry);
922 return res;
923}
924
925/*
24ac23ab 926 * Returns a referenced nfs4_state
1da177e4
LT		 927 */
928static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
929{
930 struct nfs4_state_owner *sp;
931 struct nfs4_state *state = NULL;
932 struct nfs_server *server = NFS_SERVER(dir);
933 struct nfs4_client *clp = server->nfs4_state;
e56e0b78 934 struct nfs4_opendata *opendata;
1da177e4 935 int status;
1da177e4
LT		 936
937 /* Protect against reboot recovery conflicts */
1da177e4
LT		 938 status = -ENOMEM;
939 if (!(sp = nfs4_get_state_owner(server, cred))) {
940 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
941 goto out_err;
942 }
58d9714a
TM		 943 status = nfs4_recover_expired_lease(server);
944 if (status != 0)
b4454fe1 945 goto err_put_state_owner;
58d9714a
TM		 946 down_read(&clp->cl_sem);
947 status = -ENOMEM;
e56e0b78
TM		 948 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
949 if (opendata == NULL)
950 goto err_put_state_owner;
1da177e4 951
24ac23ab 952 status = _nfs4_proc_open(opendata);
1da177e4 953 if (status != 0)
e56e0b78 954 goto err_opendata_free;
1da177e4
LT		 955
956 status = -ENOMEM;
24ac23ab
TM		 957 state = nfs4_opendata_to_nfs4_state(opendata);
958 if (state == NULL)
e56e0b78 959 goto err_opendata_free;
e56e0b78 960 if (opendata->o_res.delegation_type != 0)
24ac23ab 961 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
e56e0b78 962 nfs4_opendata_free(opendata);
1da177e4
LT		 963 nfs4_put_state_owner(sp);
964 up_read(&clp->cl_sem);
965 *res = state;
966 return 0;
e56e0b78
TM		 967err_opendata_free:
968 nfs4_opendata_free(opendata);
969err_put_state_owner:
970 nfs4_put_state_owner(sp);
1da177e4 971out_err:
1da177e4
LT		 972 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
973 up_read(&clp->cl_sem);
1da177e4
LT		 974 *res = NULL;
975 return status;
976}
977
978
979static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
980{
981 struct nfs4_exception exception = { };
982 struct nfs4_state *res;
983 int status;
984
985 do {
986 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
987 if (status == 0)
988 break;
989 /* NOTE: BAD_SEQID means the server and client disagree about the
990 * book-keeping w.r.t. state-changing operations
991 * (OPEN/CLOSE/LOCK/LOCKU...)
992 * It is actually a sign of a bug on the client or on the server.
993 *
994 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 995 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 996 * have unhashed the old state_owner for us, and that we can
997 * therefore safely retry using a new one. We should still warn
998 * the user though...
999 */
1000 if (status == -NFS4ERR_BAD_SEQID) {
1001 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1002 exception.retry = 1;
1003 continue;
1004 }
550f5747
TM		 1005 /*
1006 * BAD_STATEID on OPEN means that the server cancelled our
1007 * state before it received the OPEN_CONFIRM.
1008 * Recover by retrying the request as per the discussion
1009 * on Page 181 of RFC3530.
1010 */
1011 if (status == -NFS4ERR_BAD_STATEID) {
1012 exception.retry = 1;
1013 continue;
1014 }
1da177e4
LT		 1015 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1016 status, &exception));
1017 } while (exception.retry);
1018 return res;
1019}
1020
1021static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
1022 struct nfs_fh *fhandle, struct iattr *sattr,
1023 struct nfs4_state *state)
1024{
1025 struct nfs_setattrargs arg = {
1026 .fh = fhandle,
1027 .iap = sattr,
1028 .server = server,
1029 .bitmask = server->attr_bitmask,
1030 };
1031 struct nfs_setattrres res = {
1032 .fattr = fattr,
1033 .server = server,
1034 };
1035 struct rpc_message msg = {
1036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1037 .rpc_argp = &arg,
1038 .rpc_resp = &res,
1039 };
26e976a8 1040 unsigned long timestamp = jiffies;
65e4308d 1041 int status;
1da177e4 1042
0e574af1 1043 nfs_fattr_init(fattr);
1da177e4 1044
08e9eac4 1045 if (state != NULL) {
1da177e4 1046 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1047 nfs4_copy_stateid(&arg.stateid, state, current->files);
1048 } else
1da177e4
LT		 1049 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1050
65e4308d 1051 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1052 if (status == 0 && state != NULL)
1053 renew_lease(server, timestamp);
65e4308d 1054 return status;
1da177e4
LT		 1055}
1056
1057static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
1058 struct nfs_fh *fhandle, struct iattr *sattr,
1059 struct nfs4_state *state)
1060{
1061 struct nfs4_exception exception = { };
1062 int err;
1063 do {
1064 err = nfs4_handle_exception(server,
1065 _nfs4_do_setattr(server, fattr, fhandle, sattr,
1066 state),
1067 &exception);
1068 } while (exception.retry);
1069 return err;
1070}
1071
1072struct nfs4_closedata {
1073 struct inode *inode;
1074 struct nfs4_state *state;
1075 struct nfs_closeargs arg;
1076 struct nfs_closeres res;
516a6af6 1077 struct nfs_fattr fattr;
26e976a8 1078 unsigned long timestamp;
1da177e4
LT		 1079};
1080
963d8fe5 1081static void nfs4_free_closedata(void *data)
9512135d 1082{
963d8fe5
TM		 1083 struct nfs4_closedata *calldata = data;
1084 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1085
1086 nfs4_put_open_state(calldata->state);
1087 nfs_free_seqid(calldata->arg.seqid);
9512135d 1088 nfs4_put_state_owner(sp);
9512135d
TM		 1089 kfree(calldata);
1090}
1091
963d8fe5 1092static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1093{
963d8fe5 1094 struct nfs4_closedata *calldata = data;
1da177e4 1095 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1096 struct nfs_server *server = NFS_SERVER(calldata->inode);
1097
4ce70ada
TM		 1098 if (RPC_ASSASSINATED(task))
1099 return;
1da177e4
LT		 1100 /* hmm. we are done with the inode, and in the process of freeing
1101 * the state_owner. we keep this around to process errors
1102 */
cee54fc9 1103 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1104 switch (task->tk_status) {
1105 case 0:
1106 memcpy(&state->stateid, &calldata->res.stateid,
1107 sizeof(state->stateid));
26e976a8 1108 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1109 break;
1110 case -NFS4ERR_STALE_STATEID:
1111 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1112 nfs4_schedule_state_recovery(server->nfs4_state);
1113 break;
1114 default:
1115 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1116 rpc_restart_call(task);
1117 return;
1118 }
1119 }
516a6af6 1120 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1121}
1122
4ce70ada 1123static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1124{
4ce70ada 1125 struct nfs4_closedata *calldata = data;
9512135d 1126 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1127 struct rpc_message msg = {
1128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1129 .rpc_argp = &calldata->arg,
1130 .rpc_resp = &calldata->res,
9512135d 1131 .rpc_cred = state->owner->so_cred,
1da177e4 1132 };
4cecb76f 1133 int mode = 0, old_mode;
9512135d 1134
963d8fe5 1135 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1136 return;
9512135d
TM		 1137 /* Recalculate the new open mode in case someone reopened the file
1138 * while we were waiting in line to be scheduled.
1139 */
4cecb76f
TM		 1140 spin_lock(&state->owner->so_lock);
1141 spin_lock(&calldata->inode->i_lock);
1142 mode = old_mode = state->state;
e7616923
TM		 1143 if (state->n_rdwr == 0) {
1144 if (state->n_rdonly == 0)
1145 mode &= ~FMODE_READ;
1146 if (state->n_wronly == 0)
1147 mode &= ~FMODE_WRITE;
1148 }
4cecb76f
TM		 1149 nfs4_state_set_mode_locked(state, mode);
1150 spin_unlock(&calldata->inode->i_lock);
1151 spin_unlock(&state->owner->so_lock);
1152 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
963d8fe5
TM		 1153 /* Note: exit _without_ calling nfs4_close_done */
1154 task->tk_action = NULL;
9512135d
TM		 1155 return;
1156 }
516a6af6 1157 nfs_fattr_init(calldata->res.fattr);
9512135d 1158 if (mode != 0)
1da177e4 1159 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d 1160 calldata->arg.open_flags = mode;
26e976a8 1161 calldata->timestamp = jiffies;
9512135d 1162 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1163}
1164
963d8fe5 1165static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1166 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1167 .rpc_call_done = nfs4_close_done,
1168 .rpc_release = nfs4_free_closedata,
1169};
1170
1da177e4
LT		 1171/*
1172 * It is possible for data to be read/written from a mem-mapped file
1173 * after the sys_close call (which hits the vfs layer as a flush).
1174 * This means that we can't safely call nfsv4 close on a file until
1175 * the inode is cleared. This in turn means that we are not good
1176 * NFSv4 citizens - we do not indicate to the server to update the file's
1177 * share state even when we are done with one of the three share
1178 * stateid's in the inode.
1179 *
1180 * NOTE: Caller must be holding the sp->so_owner semaphore!
1181 */
4cecb76f 1182int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1da177e4 1183{
516a6af6 1184 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1185 struct nfs4_closedata *calldata;
9512135d 1186 int status = -ENOMEM;
1da177e4 1187
9512135d 1188 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1189 if (calldata == NULL)
9512135d 1190 goto out;
1da177e4
LT		 1191 calldata->inode = inode;
1192 calldata->state = state;
1193 calldata->arg.fh = NFS_FH(inode);
9512135d 1194 calldata->arg.stateid = &state->stateid;
1da177e4 1195 /* Serialization for the sequence id */
cee54fc9 1196 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1197 if (calldata->arg.seqid == NULL)
1198 goto out_free_calldata;
516a6af6
TM		 1199 calldata->arg.bitmask = server->attr_bitmask;
1200 calldata->res.fattr = &calldata->fattr;
1201 calldata->res.server = server;
9512135d 1202
4ce70ada 1203 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
9512135d
TM		 1204 if (status == 0)
1205 goto out;
1206
1207 nfs_free_seqid(calldata->arg.seqid);
1208out_free_calldata:
1209 kfree(calldata);
1210out:
1211 return status;
1da177e4
LT		 1212}
1213
02a913a7
TM		 1214static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
1215{
1216 struct file *filp;
1217
1218 filp = lookup_instantiate_filp(nd, dentry, NULL);
1219 if (!IS_ERR(filp)) {
1220 struct nfs_open_context *ctx;
1221 ctx = (struct nfs_open_context *)filp->private_data;
1222 ctx->state = state;
1223 } else
1224 nfs4_close_state(state, nd->intent.open.flags);
1225}
1226
1227struct dentry *
1da177e4
LT		 1228nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1229{
1230 struct iattr attr;
1231 struct rpc_cred *cred;
1232 struct nfs4_state *state;
02a913a7 1233 struct dentry *res;
1da177e4
LT		 1234
1235 if (nd->flags & LOOKUP_CREATE) {
1236 attr.ia_mode = nd->intent.open.create_mode;
1237 attr.ia_valid = ATTR_MODE;
1238 if (!IS_POSIXACL(dir))
1239 attr.ia_mode &= ~current->fs->umask;
1240 } else {
1241 attr.ia_valid = 0;
1242 BUG_ON(nd->intent.open.flags & O_CREAT);
1243 }
1244
1245 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1246 if (IS_ERR(cred))
02a913a7 1247 return (struct dentry *)cred;
1da177e4
LT		 1248 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1249 put_rpccred(cred);
02a913a7
TM		 1250 if (IS_ERR(state)) {
1251 if (PTR_ERR(state) == -ENOENT)
1252 d_add(dentry, NULL);
1253 return (struct dentry *)state;
1254 }
24ac23ab 1255 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM		 1256 if (res != NULL)
1257 dentry = res;
1258 nfs4_intent_set_file(nd, dentry, state);
1259 return res;
1da177e4
LT		 1260}
1261
1262int
02a913a7 1263nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4
LT		 1264{
1265 struct rpc_cred *cred;
1266 struct nfs4_state *state;
1da177e4
LT		 1267
1268 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1269 if (IS_ERR(cred))
1270 return PTR_ERR(cred);
1271 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1272 if (IS_ERR(state))
1273 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1274 put_rpccred(cred);
02a913a7
TM		 1275 if (IS_ERR(state)) {
1276 switch (PTR_ERR(state)) {
1277 case -EPERM:
1278 case -EACCES:
1279 case -EDQUOT:
1280 case -ENOSPC:
1281 case -EROFS:
1282 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1283 return 1;
1284 case -ENOENT:
1285 if (dentry->d_inode == NULL)
1286 return 1;
1287 }
1288 goto out_drop;
1289 }
24ac23ab 1290 if (state->inode == dentry->d_inode) {
02a913a7 1291 nfs4_intent_set_file(nd, dentry, state);
1da177e4
LT		 1292 return 1;
1293 }
1da177e4 1294 nfs4_close_state(state, openflags);
02a913a7
TM		 1295out_drop:
1296 d_drop(dentry);
1da177e4
LT		 1297 return 0;
1298}
1299
1300
1301static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1302{
1303 struct nfs4_server_caps_res res = {};
1304 struct rpc_message msg = {
1305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1306 .rpc_argp = fhandle,
1307 .rpc_resp = &res,
1308 };
1309 int status;
1310
1311 status = rpc_call_sync(server->client, &msg, 0);
1312 if (status == 0) {
1313 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1314 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1315 server->caps |= NFS_CAP_ACLS;
1316 if (res.has_links != 0)
1317 server->caps |= NFS_CAP_HARDLINKS;
1318 if (res.has_symlinks != 0)
1319 server->caps |= NFS_CAP_SYMLINKS;
1320 server->acl_bitmask = res.acl_bitmask;
1321 }
1322 return status;
1323}
1324
1325static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1326{
1327 struct nfs4_exception exception = { };
1328 int err;
1329 do {
1330 err = nfs4_handle_exception(server,
1331 _nfs4_server_capabilities(server, fhandle),
1332 &exception);
1333 } while (exception.retry);
1334 return err;
1335}
1336
1337static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1338 struct nfs_fsinfo *info)
1339{
1da177e4
LT		 1340 struct nfs4_lookup_root_arg args = {
1341 .bitmask = nfs4_fattr_bitmap,
1342 };
1343 struct nfs4_lookup_res res = {
1344 .server = server,
0e574af1 1345 .fattr = info->fattr,
1da177e4
LT		 1346 .fh = fhandle,
1347 };
1348 struct rpc_message msg = {
1349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1350 .rpc_argp = &args,
1351 .rpc_resp = &res,
1352 };
0e574af1 1353 nfs_fattr_init(info->fattr);
1da177e4
LT		 1354 return rpc_call_sync(server->client, &msg, 0);
1355}
1356
1357static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1358 struct nfs_fsinfo *info)
1359{
1360 struct nfs4_exception exception = { };
1361 int err;
1362 do {
1363 err = nfs4_handle_exception(server,
1364 _nfs4_lookup_root(server, fhandle, info),
1365 &exception);
1366 } while (exception.retry);
1367 return err;
1368}
1369
1370static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1371 struct nfs_fsinfo *info)
1372{
1373 struct nfs_fattr * fattr = info->fattr;
1374 unsigned char * p;
1375 struct qstr q;
1376 struct nfs4_lookup_arg args = {
1377 .dir_fh = fhandle,
1378 .name = &q,
1379 .bitmask = nfs4_fattr_bitmap,
1380 };
1381 struct nfs4_lookup_res res = {
1382 .server = server,
1383 .fattr = fattr,
1384 .fh = fhandle,
1385 };
1386 struct rpc_message msg = {
1387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1388 .rpc_argp = &args,
1389 .rpc_resp = &res,
1390 };
1391 int status;
1392
1393 /*
1394 * Now we do a separate LOOKUP for each component of the mount path.
1395 * The LOOKUPs are done separately so that we can conveniently
1396 * catch an ERR_WRONGSEC if it occurs along the way...
1397 */
1398 status = nfs4_lookup_root(server, fhandle, info);
1399 if (status)
1400 goto out;
1401
1402 p = server->mnt_path;
1403 for (;;) {
1404 struct nfs4_exception exception = { };
1405
1406 while (*p == '/')
1407 p++;
1408 if (!*p)
1409 break;
1410 q.name = p;
1411 while (*p && (*p != '/'))
1412 p++;
1413 q.len = p - q.name;
1414
1415 do {
0e574af1 1416 nfs_fattr_init(fattr);
1da177e4
LT		 1417 status = nfs4_handle_exception(server,
1418 rpc_call_sync(server->client, &msg, 0),
1419 &exception);
1420 } while (exception.retry);
1421 if (status == 0)
1422 continue;
1423 if (status == -ENOENT) {
1424 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1425 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1426 }
1427 break;
1428 }
1429 if (status == 0)
1430 status = nfs4_server_capabilities(server, fhandle);
1431 if (status == 0)
1432 status = nfs4_do_fsinfo(server, fhandle, info);
1433out:
c12e87f4 1434 return nfs4_map_errors(status);
1da177e4
LT		 1435}
1436
1437static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1438{
1439 struct nfs4_getattr_arg args = {
1440 .fh = fhandle,
1441 .bitmask = server->attr_bitmask,
1442 };
1443 struct nfs4_getattr_res res = {
1444 .fattr = fattr,
1445 .server = server,
1446 };
1447 struct rpc_message msg = {
1448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1449 .rpc_argp = &args,
1450 .rpc_resp = &res,
1451 };
1452
0e574af1 1453 nfs_fattr_init(fattr);
1da177e4
LT		 1454 return rpc_call_sync(server->client, &msg, 0);
1455}
1456
1457static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1458{
1459 struct nfs4_exception exception = { };
1460 int err;
1461 do {
1462 err = nfs4_handle_exception(server,
1463 _nfs4_proc_getattr(server, fhandle, fattr),
1464 &exception);
1465 } while (exception.retry);
1466 return err;
1467}
1468
1469/*
1470 * The file is not closed if it is opened due to the a request to change
1471 * the size of the file. The open call will not be needed once the
1472 * VFS layer lookup-intents are implemented.
1473 *
1474 * Close is called when the inode is destroyed.
1475 * If we haven't opened the file for O_WRONLY, we
1476 * need to in the size_change case to obtain a stateid.
1477 *
1478 * Got race?
1479 * Because OPEN is always done by name in nfsv4, it is
1480 * possible that we opened a different file by the same
1481 * name. We can recognize this race condition, but we
1482 * can't do anything about it besides returning an error.
1483 *
1484 * This will be fixed with VFS changes (lookup-intent).
1485 */
1486static int
1487nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1488 struct iattr *sattr)
1489{
08e9eac4
TM		 1490 struct rpc_cred *cred;
1491 struct inode *inode = dentry->d_inode;
d530838b
TM		 1492 struct nfs_open_context *ctx;
1493 struct nfs4_state *state = NULL;
1da177e4
LT		 1494 int status;
1495
0e574af1 1496 nfs_fattr_init(fattr);
1da177e4 1497
08e9eac4
TM		 1498 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1499 if (IS_ERR(cred))
1500 return PTR_ERR(cred);
d530838b
TM		 1501
1502 /* Search for an existing open(O_WRITE) file */
1503 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1504 if (ctx != NULL)
1505 state = ctx->state;
08e9eac4 1506
1da177e4
LT		 1507 status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
1508 NFS_FH(inode), sattr, state);
65e4308d
TM		 1509 if (status == 0)
1510 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1511 if (ctx != NULL)
1512 put_nfs_open_context(ctx);
08e9eac4 1513 put_rpccred(cred);
1da177e4
LT		 1514 return status;
1515}
1516
1517static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1518 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1519{
1520 int status;
1521 struct nfs_server *server = NFS_SERVER(dir);
1522 struct nfs4_lookup_arg args = {
1523 .bitmask = server->attr_bitmask,
1524 .dir_fh = NFS_FH(dir),
1525 .name = name,
1526 };
1527 struct nfs4_lookup_res res = {
1528 .server = server,
1529 .fattr = fattr,
1530 .fh = fhandle,
1531 };
1532 struct rpc_message msg = {
1533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1534 .rpc_argp = &args,
1535 .rpc_resp = &res,
1536 };
1537
0e574af1 1538 nfs_fattr_init(fattr);
1da177e4
LT		 1539
1540 dprintk("NFS call lookup %s\n", name->name);
1541 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1542 dprintk("NFS reply lookup: %d\n", status);
1543 return status;
1544}
1545
1546static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1547{
1548 struct nfs4_exception exception = { };
1549 int err;
1550 do {
1551 err = nfs4_handle_exception(NFS_SERVER(dir),
1552 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1553 &exception);
1554 } while (exception.retry);
1555 return err;
1556}
1557
1558static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1559{
1560 struct nfs4_accessargs args = {
1561 .fh = NFS_FH(inode),
1562 };
1563 struct nfs4_accessres res = { 0 };
1564 struct rpc_message msg = {
1565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1566 .rpc_argp = &args,
1567 .rpc_resp = &res,
1568 .rpc_cred = entry->cred,
1569 };
1570 int mode = entry->mask;
1571 int status;
1572
1573 /*
1574 * Determine which access bits we want to ask for...
1575 */
1576 if (mode & MAY_READ)
1577 args.access |= NFS4_ACCESS_READ;
1578 if (S_ISDIR(inode->i_mode)) {
1579 if (mode & MAY_WRITE)
1580 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1581 if (mode & MAY_EXEC)
1582 args.access |= NFS4_ACCESS_LOOKUP;
1583 } else {
1584 if (mode & MAY_WRITE)
1585 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1586 if (mode & MAY_EXEC)
1587 args.access |= NFS4_ACCESS_EXECUTE;
1588 }
1589 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1590 if (!status) {
1591 entry->mask = 0;
1592 if (res.access & NFS4_ACCESS_READ)
1593 entry->mask |= MAY_READ;
1594 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1595 entry->mask |= MAY_WRITE;
1596 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1597 entry->mask |= MAY_EXEC;
1598 }
1599 return status;
1600}
1601
1602static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1603{
1604 struct nfs4_exception exception = { };
1605 int err;
1606 do {
1607 err = nfs4_handle_exception(NFS_SERVER(inode),
1608 _nfs4_proc_access(inode, entry),
1609 &exception);
1610 } while (exception.retry);
1611 return err;
1612}
1613
1614/*
1615 * TODO: For the time being, we don't try to get any attributes
1616 * along with any of the zero-copy operations READ, READDIR,
1617 * READLINK, WRITE.
1618 *
1619 * In the case of the first three, we want to put the GETATTR
1620 * after the read-type operation -- this is because it is hard
1621 * to predict the length of a GETATTR response in v4, and thus
1622 * align the READ data correctly. This means that the GETATTR
1623 * may end up partially falling into the page cache, and we should
1624 * shift it into the 'tail' of the xdr_buf before processing.
1625 * To do this efficiently, we need to know the total length
1626 * of data received, which doesn't seem to be available outside
1627 * of the RPC layer.
1628 *
1629 * In the case of WRITE, we also want to put the GETATTR after
1630 * the operation -- in this case because we want to make sure
1631 * we get the post-operation mtime and size. This means that
1632 * we can't use xdr_encode_pages() as written: we need a variant
1633 * of it which would leave room in the 'tail' iovec.
1634 *
1635 * Both of these changes to the XDR layer would in fact be quite
1636 * minor, but I decided to leave them for a subsequent patch.
1637 */
1638static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1639 unsigned int pgbase, unsigned int pglen)
1640{
1641 struct nfs4_readlink args = {
1642 .fh = NFS_FH(inode),
1643 .pgbase = pgbase,
1644 .pglen = pglen,
1645 .pages = &page,
1646 };
1647 struct rpc_message msg = {
1648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1649 .rpc_argp = &args,
1650 .rpc_resp = NULL,
1651 };
1652
1653 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1654}
1655
1656static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1657 unsigned int pgbase, unsigned int pglen)
1658{
1659 struct nfs4_exception exception = { };
1660 int err;
1661 do {
1662 err = nfs4_handle_exception(NFS_SERVER(inode),
1663 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1664 &exception);
1665 } while (exception.retry);
1666 return err;
1667}
1668
1669static int _nfs4_proc_read(struct nfs_read_data *rdata)
1670{
1671 int flags = rdata->flags;
1672 struct inode *inode = rdata->inode;
1673 struct nfs_fattr *fattr = rdata->res.fattr;
1674 struct nfs_server *server = NFS_SERVER(inode);
1675 struct rpc_message msg = {
1676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1677 .rpc_argp = &rdata->args,
1678 .rpc_resp = &rdata->res,
1679 .rpc_cred = rdata->cred,
1680 };
1681 unsigned long timestamp = jiffies;
1682 int status;
1683
1684 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1685 (long long) rdata->args.offset);
1686
0e574af1 1687 nfs_fattr_init(fattr);
1da177e4
LT		 1688 status = rpc_call_sync(server->client, &msg, flags);
1689 if (!status)
1690 renew_lease(server, timestamp);
1691 dprintk("NFS reply read: %d\n", status);
1692 return status;
1693}
1694
1695static int nfs4_proc_read(struct nfs_read_data *rdata)
1696{
1697 struct nfs4_exception exception = { };
1698 int err;
1699 do {
1700 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1701 _nfs4_proc_read(rdata),
1702 &exception);
1703 } while (exception.retry);
1704 return err;
1705}
1706
1707static int _nfs4_proc_write(struct nfs_write_data *wdata)
1708{
1709 int rpcflags = wdata->flags;
1710 struct inode *inode = wdata->inode;
1711 struct nfs_fattr *fattr = wdata->res.fattr;
1712 struct nfs_server *server = NFS_SERVER(inode);
1713 struct rpc_message msg = {
1714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1715 .rpc_argp = &wdata->args,
1716 .rpc_resp = &wdata->res,
1717 .rpc_cred = wdata->cred,
1718 };
1719 int status;
1720
1721 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1722 (long long) wdata->args.offset);
1723
3b6efee9
TM		 1724 wdata->args.bitmask = server->attr_bitmask;
1725 wdata->res.server = server;
26e976a8 1726 wdata->timestamp = jiffies;
0e574af1 1727 nfs_fattr_init(fattr);
1da177e4
LT		 1728 status = rpc_call_sync(server->client, &msg, rpcflags);
1729 dprintk("NFS reply write: %d\n", status);
3b6efee9
TM		 1730 if (status < 0)
1731 return status;
26e976a8 1732 renew_lease(server, wdata->timestamp);
3b6efee9
TM		 1733 nfs_post_op_update_inode(inode, fattr);
1734 return wdata->res.count;
1da177e4
LT		 1735}
1736
1737static int nfs4_proc_write(struct nfs_write_data *wdata)
1738{
1739 struct nfs4_exception exception = { };
1740 int err;
1741 do {
1742 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1743 _nfs4_proc_write(wdata),
1744 &exception);
1745 } while (exception.retry);
1746 return err;
1747}
1748
1749static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1750{
1751 struct inode *inode = cdata->inode;
1752 struct nfs_fattr *fattr = cdata->res.fattr;
1753 struct nfs_server *server = NFS_SERVER(inode);
1754 struct rpc_message msg = {
1755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1756 .rpc_argp = &cdata->args,
1757 .rpc_resp = &cdata->res,
1758 .rpc_cred = cdata->cred,
1759 };
1760 int status;
1761
1762 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1763 (long long) cdata->args.offset);
1764
3b6efee9
TM		 1765 cdata->args.bitmask = server->attr_bitmask;
1766 cdata->res.server = server;
26e976a8 1767 cdata->timestamp = jiffies;
0e574af1 1768 nfs_fattr_init(fattr);
1da177e4 1769 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1770 if (status >= 0)
1771 renew_lease(server, cdata->timestamp);
1da177e4 1772 dprintk("NFS reply commit: %d\n", status);
3b6efee9
TM		 1773 if (status >= 0)
1774 nfs_post_op_update_inode(inode, fattr);
1da177e4
LT		 1775 return status;
1776}
1777
1778static int nfs4_proc_commit(struct nfs_write_data *cdata)
1779{
1780 struct nfs4_exception exception = { };
1781 int err;
1782 do {
1783 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1784 _nfs4_proc_commit(cdata),
1785 &exception);
1786 } while (exception.retry);
1787 return err;
1788}
1789
1790/*
1791 * Got race?
1792 * We will need to arrange for the VFS layer to provide an atomic open.
1793 * Until then, this create/open method is prone to inefficiency and race
1794 * conditions due to the lookup, create, and open VFS calls from sys_open()
1795 * placed on the wire.
1796 *
1797 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1798 * The file will be opened again in the subsequent VFS open call
1799 * (nfs4_proc_file_open).
1800 *
1801 * The open for read will just hang around to be used by any process that
1802 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1803 */
1804
1805static int
1806nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1807 int flags, struct nameidata *nd)
1da177e4
LT		 1808{
1809 struct nfs4_state *state;
1810 struct rpc_cred *cred;
1811 int status = 0;
1812
1813 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1814 if (IS_ERR(cred)) {
1815 status = PTR_ERR(cred);
1816 goto out;
1817 }
1818 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1819 put_rpccred(cred);
1820 if (IS_ERR(state)) {
1821 status = PTR_ERR(state);
1822 goto out;
1823 }
24ac23ab 1824 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1825 if (flags & O_EXCL) {
1826 struct nfs_fattr fattr;
1827 status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
1828 NFS_FH(state->inode), sattr, state);
02a913a7 1829 if (status == 0)
65e4308d 1830 nfs_setattr_update_inode(state->inode, sattr);
02a913a7
TM		 1831 }
1832 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
1833 nfs4_intent_set_file(nd, dentry, state);
1834 else
1835 nfs4_close_state(state, flags);
1da177e4
LT		 1836out:
1837 return status;
1838}
1839
1840static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1841{
16e42959 1842 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 1843 struct nfs4_remove_arg args = {
1844 .fh = NFS_FH(dir),
1845 .name = name,
16e42959
TM		 1846 .bitmask = server->attr_bitmask,
1847 };
1848 struct nfs_fattr dir_attr;
1849 struct nfs4_remove_res res = {
1850 .server = server,
1851 .dir_attr = &dir_attr,
1da177e4 1852 };
1da177e4
LT		 1853 struct rpc_message msg = {
1854 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1855 .rpc_argp = &args,
1856 .rpc_resp = &res,
1857 };
1858 int status;
1859
16e42959
TM		 1860 nfs_fattr_init(res.dir_attr);
1861 status = rpc_call_sync(server->client, &msg, 0);
1862 if (status == 0) {
1863 update_changeattr(dir, &res.cinfo);
1864 nfs_post_op_update_inode(dir, res.dir_attr);
1865 }
1da177e4
LT		 1866 return status;
1867}
1868
1869static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1870{
1871 struct nfs4_exception exception = { };
1872 int err;
1873 do {
1874 err = nfs4_handle_exception(NFS_SERVER(dir),
1875 _nfs4_proc_remove(dir, name),
1876 &exception);
1877 } while (exception.retry);
1878 return err;
1879}
1880
1881struct unlink_desc {
1882 struct nfs4_remove_arg args;
16e42959
TM		 1883 struct nfs4_remove_res res;
1884 struct nfs_fattr dir_attr;
1da177e4
LT		 1885};
1886
1887static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1888 struct qstr *name)
1889{
16e42959 1890 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1da177e4
LT		 1891 struct unlink_desc *up;
1892
1893 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1894 if (!up)
1895 return -ENOMEM;
1896
1897 up->args.fh = NFS_FH(dir->d_inode);
1898 up->args.name = name;
16e42959
TM		 1899 up->args.bitmask = server->attr_bitmask;
1900 up->res.server = server;
1901 up->res.dir_attr = &up->dir_attr;
1da177e4
LT		 1902
1903 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1904 msg->rpc_argp = &up->args;
1905 msg->rpc_resp = &up->res;
1906 return 0;
1907}
1908
1909static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1910{
1911 struct rpc_message *msg = &task->tk_msg;
1912 struct unlink_desc *up;
1913
1914 if (msg->rpc_resp != NULL) {
1915 up = container_of(msg->rpc_resp, struct unlink_desc, res);
16e42959
TM		 1916 update_changeattr(dir->d_inode, &up->res.cinfo);
1917 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1da177e4
LT		 1918 kfree(up);
1919 msg->rpc_resp = NULL;
1920 msg->rpc_argp = NULL;
1921 }
1922 return 0;
1923}
1924
1925static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1926 struct inode *new_dir, struct qstr *new_name)
1927{
6caf2c82 1928 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1929 struct nfs4_rename_arg arg = {
1930 .old_dir = NFS_FH(old_dir),
1931 .new_dir = NFS_FH(new_dir),
1932 .old_name = old_name,
1933 .new_name = new_name,
6caf2c82
TM		 1934 .bitmask = server->attr_bitmask,
1935 };
1936 struct nfs_fattr old_fattr, new_fattr;
1937 struct nfs4_rename_res res = {
1938 .server = server,
1939 .old_fattr = &old_fattr,
1940 .new_fattr = &new_fattr,
1da177e4 1941 };
1da177e4
LT		 1942 struct rpc_message msg = {
1943 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1944 .rpc_argp = &arg,
1945 .rpc_resp = &res,
1946 };
1947 int status;
1948
6caf2c82
TM		 1949 nfs_fattr_init(res.old_fattr);
1950 nfs_fattr_init(res.new_fattr);
1951 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 1952
1953 if (!status) {
1954 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 1955 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 1956 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 1957 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 1958 }
1959 return status;
1960}
1961
1962static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1963 struct inode *new_dir, struct qstr *new_name)
1964{
1965 struct nfs4_exception exception = { };
1966 int err;
1967 do {
1968 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1969 _nfs4_proc_rename(old_dir, old_name,
1970 new_dir, new_name),
1971 &exception);
1972 } while (exception.retry);
1973 return err;
1974}
1975
1976static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1977{
91ba2eee 1978 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1979 struct nfs4_link_arg arg = {
1980 .fh = NFS_FH(inode),
1981 .dir_fh = NFS_FH(dir),
1982 .name = name,
91ba2eee
TM		 1983 .bitmask = server->attr_bitmask,
1984 };
1985 struct nfs_fattr fattr, dir_attr;
1986 struct nfs4_link_res res = {
1987 .server = server,
1988 .fattr = &fattr,
1989 .dir_attr = &dir_attr,
1da177e4 1990 };
1da177e4
LT		 1991 struct rpc_message msg = {
1992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1993 .rpc_argp = &arg,
91ba2eee 1994 .rpc_resp = &res,
1da177e4
LT		 1995 };
1996 int status;
1997
91ba2eee
TM		 1998 nfs_fattr_init(res.fattr);
1999 nfs_fattr_init(res.dir_attr);
2000 status = rpc_call_sync(server->client, &msg, 0);
2001 if (!status) {
2002 update_changeattr(dir, &res.cinfo);
2003 nfs_post_op_update_inode(dir, res.dir_attr);
2004 nfs_refresh_inode(inode, res.fattr);
2005 }
1da177e4
LT		 2006
2007 return status;
2008}
2009
2010static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2011{
2012 struct nfs4_exception exception = { };
2013 int err;
2014 do {
2015 err = nfs4_handle_exception(NFS_SERVER(inode),
2016 _nfs4_proc_link(inode, dir, name),
2017 &exception);
2018 } while (exception.retry);
2019 return err;
2020}
2021
2022static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2023 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2024 struct nfs_fattr *fattr)
2025{
2026 struct nfs_server *server = NFS_SERVER(dir);
56ae19f3 2027 struct nfs_fattr dir_fattr;
1da177e4
LT		 2028 struct nfs4_create_arg arg = {
2029 .dir_fh = NFS_FH(dir),
2030 .server = server,
2031 .name = name,
2032 .attrs = sattr,
2033 .ftype = NF4LNK,
2034 .bitmask = server->attr_bitmask,
2035 };
2036 struct nfs4_create_res res = {
2037 .server = server,
2038 .fh = fhandle,
2039 .fattr = fattr,
56ae19f3 2040 .dir_fattr = &dir_fattr,
1da177e4
LT		 2041 };
2042 struct rpc_message msg = {
2043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2044 .rpc_argp = &arg,
2045 .rpc_resp = &res,
2046 };
2047 int status;
2048
2049 if (path->len > NFS4_MAXPATHLEN)
2050 return -ENAMETOOLONG;
2051 arg.u.symlink = path;
0e574af1 2052 nfs_fattr_init(fattr);
56ae19f3 2053 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2054
2055 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2056 if (!status)
2057 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2058 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2059 return status;
2060}
2061
2062static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2063 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2064 struct nfs_fattr *fattr)
2065{
2066 struct nfs4_exception exception = { };
2067 int err;
2068 do {
2069 err = nfs4_handle_exception(NFS_SERVER(dir),
2070 _nfs4_proc_symlink(dir, name, path, sattr,
2071 fhandle, fattr),
2072 &exception);
2073 } while (exception.retry);
2074 return err;
2075}
2076
2077static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2078 struct iattr *sattr)
2079{
2080 struct nfs_server *server = NFS_SERVER(dir);
2081 struct nfs_fh fhandle;
56ae19f3 2082 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2083 struct nfs4_create_arg arg = {
2084 .dir_fh = NFS_FH(dir),
2085 .server = server,
2086 .name = &dentry->d_name,
2087 .attrs = sattr,
2088 .ftype = NF4DIR,
2089 .bitmask = server->attr_bitmask,
2090 };
2091 struct nfs4_create_res res = {
2092 .server = server,
2093 .fh = &fhandle,
2094 .fattr = &fattr,
56ae19f3 2095 .dir_fattr = &dir_fattr,
1da177e4
LT		 2096 };
2097 struct rpc_message msg = {
2098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2099 .rpc_argp = &arg,
2100 .rpc_resp = &res,
2101 };
2102 int status;
2103
0e574af1 2104 nfs_fattr_init(&fattr);
56ae19f3 2105 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2106
2107 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2108 if (!status) {
2109 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2110 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2111 status = nfs_instantiate(dentry, &fhandle, &fattr);
2112 }
2113 return status;
2114}
2115
2116static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2117 struct iattr *sattr)
2118{
2119 struct nfs4_exception exception = { };
2120 int err;
2121 do {
2122 err = nfs4_handle_exception(NFS_SERVER(dir),
2123 _nfs4_proc_mkdir(dir, dentry, sattr),
2124 &exception);
2125 } while (exception.retry);
2126 return err;
2127}
2128
2129static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2130 u64 cookie, struct page *page, unsigned int count, int plus)
2131{
2132 struct inode *dir = dentry->d_inode;
2133 struct nfs4_readdir_arg args = {
2134 .fh = NFS_FH(dir),
2135 .pages = &page,
2136 .pgbase = 0,
2137 .count = count,
2138 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2139 };
2140 struct nfs4_readdir_res res;
2141 struct rpc_message msg = {
2142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2143 .rpc_argp = &args,
2144 .rpc_resp = &res,
2145 .rpc_cred = cred,
2146 };
2147 int status;
2148
eadf4598
TM		 2149 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2150 dentry->d_parent->d_name.name,
2151 dentry->d_name.name,
2152 (unsigned long long)cookie);
1da177e4
LT		 2153 lock_kernel();
2154 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2155 res.pgbase = args.pgbase;
2156 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2157 if (status == 0)
2158 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2159 unlock_kernel();
eadf4598 2160 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2161 return status;
2162}
2163
2164static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2165 u64 cookie, struct page *page, unsigned int count, int plus)
2166{
2167 struct nfs4_exception exception = { };
2168 int err;
2169 do {
2170 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2171 _nfs4_proc_readdir(dentry, cred, cookie,
2172 page, count, plus),
2173 &exception);
2174 } while (exception.retry);
2175 return err;
2176}
2177
2178static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2179 struct iattr *sattr, dev_t rdev)
2180{
2181 struct nfs_server *server = NFS_SERVER(dir);
2182 struct nfs_fh fh;
56ae19f3 2183 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2184 struct nfs4_create_arg arg = {
2185 .dir_fh = NFS_FH(dir),
2186 .server = server,
2187 .name = &dentry->d_name,
2188 .attrs = sattr,
2189 .bitmask = server->attr_bitmask,
2190 };
2191 struct nfs4_create_res res = {
2192 .server = server,
2193 .fh = &fh,
2194 .fattr = &fattr,
56ae19f3 2195 .dir_fattr = &dir_fattr,
1da177e4
LT		 2196 };
2197 struct rpc_message msg = {
2198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2199 .rpc_argp = &arg,
2200 .rpc_resp = &res,
2201 };
2202 int status;
2203 int mode = sattr->ia_mode;
2204
0e574af1 2205 nfs_fattr_init(&fattr);
56ae19f3 2206 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2207
2208 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2209 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2210 if (S_ISFIFO(mode))
2211 arg.ftype = NF4FIFO;
2212 else if (S_ISBLK(mode)) {
2213 arg.ftype = NF4BLK;
2214 arg.u.device.specdata1 = MAJOR(rdev);
2215 arg.u.device.specdata2 = MINOR(rdev);
2216 }
2217 else if (S_ISCHR(mode)) {
2218 arg.ftype = NF4CHR;
2219 arg.u.device.specdata1 = MAJOR(rdev);
2220 arg.u.device.specdata2 = MINOR(rdev);
2221 }
2222 else
2223 arg.ftype = NF4SOCK;
2224
2225 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2226 if (status == 0) {
2227 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2228 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2229 status = nfs_instantiate(dentry, &fh, &fattr);
2230 }
2231 return status;
2232}
2233
2234static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2235 struct iattr *sattr, dev_t rdev)
2236{
2237 struct nfs4_exception exception = { };
2238 int err;
2239 do {
2240 err = nfs4_handle_exception(NFS_SERVER(dir),
2241 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2242 &exception);
2243 } while (exception.retry);
2244 return err;
2245}
2246
2247static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2248 struct nfs_fsstat *fsstat)
2249{
2250 struct nfs4_statfs_arg args = {
2251 .fh = fhandle,
2252 .bitmask = server->attr_bitmask,
2253 };
2254 struct rpc_message msg = {
2255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2256 .rpc_argp = &args,
2257 .rpc_resp = fsstat,
2258 };
2259
0e574af1 2260 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2261 return rpc_call_sync(server->client, &msg, 0);
2262}
2263
2264static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2265{
2266 struct nfs4_exception exception = { };
2267 int err;
2268 do {
2269 err = nfs4_handle_exception(server,
2270 _nfs4_proc_statfs(server, fhandle, fsstat),
2271 &exception);
2272 } while (exception.retry);
2273 return err;
2274}
2275
2276static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2277 struct nfs_fsinfo *fsinfo)
2278{
2279 struct nfs4_fsinfo_arg args = {
2280 .fh = fhandle,
2281 .bitmask = server->attr_bitmask,
2282 };
2283 struct rpc_message msg = {
2284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2285 .rpc_argp = &args,
2286 .rpc_resp = fsinfo,
2287 };
2288
2289 return rpc_call_sync(server->client, &msg, 0);
2290}
2291
2292static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2293{
2294 struct nfs4_exception exception = { };
2295 int err;
2296
2297 do {
2298 err = nfs4_handle_exception(server,
2299 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2300 &exception);
2301 } while (exception.retry);
2302 return err;
2303}
2304
2305static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2306{
0e574af1 2307 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2308 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2309}
2310
2311static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2312 struct nfs_pathconf *pathconf)
2313{
2314 struct nfs4_pathconf_arg args = {
2315 .fh = fhandle,
2316 .bitmask = server->attr_bitmask,
2317 };
2318 struct rpc_message msg = {
2319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2320 .rpc_argp = &args,
2321 .rpc_resp = pathconf,
2322 };
2323
2324 /* None of the pathconf attributes are mandatory to implement */
2325 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2326 memset(pathconf, 0, sizeof(*pathconf));
2327 return 0;
2328 }
2329
0e574af1 2330 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2331 return rpc_call_sync(server->client, &msg, 0);
2332}
2333
2334static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2335 struct nfs_pathconf *pathconf)
2336{
2337 struct nfs4_exception exception = { };
2338 int err;
2339
2340 do {
2341 err = nfs4_handle_exception(server,
2342 _nfs4_proc_pathconf(server, fhandle, pathconf),
2343 &exception);
2344 } while (exception.retry);
2345 return err;
2346}
2347
963d8fe5 2348static void nfs4_read_done(struct rpc_task *task, void *calldata)
1da177e4 2349{
963d8fe5 2350 struct nfs_read_data *data = calldata;
1da177e4
LT		 2351 struct inode *inode = data->inode;
2352
2353 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2354 rpc_restart_call(task);
2355 return;
2356 }
2357 if (task->tk_status > 0)
2358 renew_lease(NFS_SERVER(inode), data->timestamp);
2359 /* Call back common NFS readpage processing */
963d8fe5 2360 nfs_readpage_result(task, calldata);
1da177e4
LT		 2361}
2362
963d8fe5
TM		 2363static const struct rpc_call_ops nfs4_read_ops = {
2364 .rpc_call_done = nfs4_read_done,
2365 .rpc_release = nfs_readdata_release,
2366};
2367
1da177e4
LT		 2368static void
2369nfs4_proc_read_setup(struct nfs_read_data *data)
2370{
2371 struct rpc_task *task = &data->task;
2372 struct rpc_message msg = {
2373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2374 .rpc_argp = &data->args,
2375 .rpc_resp = &data->res,
2376 .rpc_cred = data->cred,
2377 };
2378 struct inode *inode = data->inode;
2379 int flags;
2380
2381 data->timestamp = jiffies;
2382
2383 /* N.B. Do we need to test? Never called for swapfile inode */
2384 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
2385
2386 /* Finalize the task. */
963d8fe5 2387 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_read_ops, data);
1da177e4
LT		 2388 rpc_call_setup(task, &msg, 0);
2389}
2390
963d8fe5 2391static void nfs4_write_done(struct rpc_task *task, void *calldata)
1da177e4 2392{
963d8fe5 2393 struct nfs_write_data *data = calldata;
1da177e4
LT		 2394 struct inode *inode = data->inode;
2395
2396 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2397 rpc_restart_call(task);
2398 return;
2399 }
4f9838c7 2400 if (task->tk_status >= 0) {
1da177e4 2401 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2402 nfs_post_op_update_inode(inode, data->res.fattr);
2403 }
1da177e4 2404 /* Call back common NFS writeback processing */
963d8fe5 2405 nfs_writeback_done(task, calldata);
1da177e4
LT		 2406}
2407
963d8fe5
TM		 2408static const struct rpc_call_ops nfs4_write_ops = {
2409 .rpc_call_done = nfs4_write_done,
2410 .rpc_release = nfs_writedata_release,
2411};
2412
1da177e4
LT		 2413static void
2414nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2415{
2416 struct rpc_task *task = &data->task;
2417 struct rpc_message msg = {
2418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2419 .rpc_argp = &data->args,
2420 .rpc_resp = &data->res,
2421 .rpc_cred = data->cred,
2422 };
2423 struct inode *inode = data->inode;
4f9838c7 2424 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2425 int stable;
2426 int flags;
2427
2428 if (how & FLUSH_STABLE) {
2429 if (!NFS_I(inode)->ncommit)
2430 stable = NFS_FILE_SYNC;
2431 else
2432 stable = NFS_DATA_SYNC;
2433 } else
2434 stable = NFS_UNSTABLE;
2435 data->args.stable = stable;
4f9838c7
TM		 2436 data->args.bitmask = server->attr_bitmask;
2437 data->res.server = server;
1da177e4
LT		 2438
2439 data->timestamp = jiffies;
2440
2441 /* Set the initial flags for the task. */
2442 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2443
2444 /* Finalize the task. */
963d8fe5 2445 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_write_ops, data);
1da177e4
LT		 2446 rpc_call_setup(task, &msg, 0);
2447}
2448
963d8fe5 2449static void nfs4_commit_done(struct rpc_task *task, void *calldata)
1da177e4 2450{
963d8fe5 2451 struct nfs_write_data *data = calldata;
1da177e4
LT		 2452 struct inode *inode = data->inode;
2453
2454 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2455 rpc_restart_call(task);
2456 return;
2457 }
4f9838c7
TM		 2458 if (task->tk_status >= 0)
2459 nfs_post_op_update_inode(inode, data->res.fattr);
1da177e4 2460 /* Call back common NFS writeback processing */
963d8fe5 2461 nfs_commit_done(task, calldata);
1da177e4
LT		 2462}
2463
963d8fe5
TM		 2464static const struct rpc_call_ops nfs4_commit_ops = {
2465 .rpc_call_done = nfs4_commit_done,
2466 .rpc_release = nfs_commit_release,
2467};
2468
1da177e4
LT		 2469static void
2470nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2471{
2472 struct rpc_task *task = &data->task;
2473 struct rpc_message msg = {
2474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2475 .rpc_argp = &data->args,
2476 .rpc_resp = &data->res,
2477 .rpc_cred = data->cred,
2478 };
2479 struct inode *inode = data->inode;
4f9838c7 2480 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2481 int flags;
2482
4f9838c7
TM		 2483 data->args.bitmask = server->attr_bitmask;
2484 data->res.server = server;
2485
1da177e4
LT		 2486 /* Set the initial flags for the task. */
2487 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2488
2489 /* Finalize the task. */
963d8fe5 2490 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_commit_ops, data);
1da177e4
LT		 2491 rpc_call_setup(task, &msg, 0);
2492}
2493
2494/*
2495 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2496 * standalone procedure for queueing an asynchronous RENEW.
2497 */
963d8fe5 2498static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4
LT		 2499{
2500 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
963d8fe5 2501 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2502
2503 if (task->tk_status < 0) {
2504 switch (task->tk_status) {
2505 case -NFS4ERR_STALE_CLIENTID:
2506 case -NFS4ERR_EXPIRED:
2507 case -NFS4ERR_CB_PATH_DOWN:
2508 nfs4_schedule_state_recovery(clp);
2509 }
2510 return;
2511 }
2512 spin_lock(&clp->cl_lock);
2513 if (time_before(clp->cl_last_renewal,timestamp))
2514 clp->cl_last_renewal = timestamp;
2515 spin_unlock(&clp->cl_lock);
2516}
2517
963d8fe5
TM		 2518static const struct rpc_call_ops nfs4_renew_ops = {
2519 .rpc_call_done = nfs4_renew_done,
2520};
2521
b4454fe1 2522int nfs4_proc_async_renew(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2523{
2524 struct rpc_message msg = {
2525 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2526 .rpc_argp = clp,
b4454fe1 2527 .rpc_cred = cred,
1da177e4
LT		 2528 };
2529
2530 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2531 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2532}
2533
b4454fe1 2534int nfs4_proc_renew(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2535{
2536 struct rpc_message msg = {
2537 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2538 .rpc_argp = clp,
b4454fe1 2539 .rpc_cred = cred,
1da177e4
LT		 2540 };
2541 unsigned long now = jiffies;
2542 int status;
2543
2544 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2545 if (status < 0)
2546 return status;
2547 spin_lock(&clp->cl_lock);
2548 if (time_before(clp->cl_last_renewal,now))
2549 clp->cl_last_renewal = now;
2550 spin_unlock(&clp->cl_lock);
2551 return 0;
2552}
2553
aa1870af
BF		 2554static inline int nfs4_server_supports_acls(struct nfs_server *server)
2555{
2556 return (server->caps & NFS_CAP_ACLS)
2557 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2558 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2559}
2560
2561/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2562 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2563 * the stack.
2564 */
2565#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2566
2567static void buf_to_pages(const void *buf, size_t buflen,
2568 struct page **pages, unsigned int *pgbase)
2569{
2570 const void *p = buf;
2571
2572 *pgbase = offset_in_page(buf);
2573 p -= *pgbase;
2574 while (p < buf + buflen) {
2575 *(pages++) = virt_to_page(p);
2576 p += PAGE_CACHE_SIZE;
2577 }
2578}
2579
e50a1c2e
BF		 2580struct nfs4_cached_acl {
2581 int cached;
2582 size_t len;
3e9d4154 2583 char data[0];
e50a1c2e
BF		 2584};
2585
2586static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2587{
2588 struct nfs_inode *nfsi = NFS_I(inode);
2589
2590 spin_lock(&inode->i_lock);
2591 kfree(nfsi->nfs4_acl);
2592 nfsi->nfs4_acl = acl;
2593 spin_unlock(&inode->i_lock);
2594}
2595
2596static void nfs4_zap_acl_attr(struct inode *inode)
2597{
2598 nfs4_set_cached_acl(inode, NULL);
2599}
2600
2601static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2602{
2603 struct nfs_inode *nfsi = NFS_I(inode);
2604 struct nfs4_cached_acl *acl;
2605 int ret = -ENOENT;
2606
2607 spin_lock(&inode->i_lock);
2608 acl = nfsi->nfs4_acl;
2609 if (acl == NULL)
2610 goto out;
2611 if (buf == NULL) /* user is just asking for length */
2612 goto out_len;
2613 if (acl->cached == 0)
2614 goto out;
2615 ret = -ERANGE; /* see getxattr(2) man page */
2616 if (acl->len > buflen)
2617 goto out;
2618 memcpy(buf, acl->data, acl->len);
2619out_len:
2620 ret = acl->len;
2621out:
2622 spin_unlock(&inode->i_lock);
2623 return ret;
2624}
2625
2626static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2627{
2628 struct nfs4_cached_acl *acl;
2629
2630 if (buf && acl_len <= PAGE_SIZE) {
2631 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2632 if (acl == NULL)
2633 goto out;
2634 acl->cached = 1;
2635 memcpy(acl->data, buf, acl_len);
2636 } else {
2637 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2638 if (acl == NULL)
2639 goto out;
2640 acl->cached = 0;
2641 }
2642 acl->len = acl_len;
2643out:
2644 nfs4_set_cached_acl(inode, acl);
2645}
2646
2647static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2648{
aa1870af
BF		 2649 struct page *pages[NFS4ACL_MAXPAGES];
2650 struct nfs_getaclargs args = {
2651 .fh = NFS_FH(inode),
2652 .acl_pages = pages,
2653 .acl_len = buflen,
2654 };
2655 size_t resp_len = buflen;
e50a1c2e 2656 void *resp_buf;
aa1870af
BF		 2657 struct rpc_message msg = {
2658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2659 .rpc_argp = &args,
2660 .rpc_resp = &resp_len,
2661 };
e50a1c2e 2662 struct page *localpage = NULL;
aa1870af
BF		 2663 int ret;
2664
e50a1c2e
BF		 2665 if (buflen < PAGE_SIZE) {
2666 /* As long as we're doing a round trip to the server anyway,
2667 * let's be prepared for a page of acl data. */
2668 localpage = alloc_page(GFP_KERNEL);
2669 resp_buf = page_address(localpage);
2670 if (localpage == NULL)
2671 return -ENOMEM;
2672 args.acl_pages[0] = localpage;
2673 args.acl_pgbase = 0;
1d95db8e 2674 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2675 } else {
2676 resp_buf = buf;
2677 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2678 }
aa1870af 2679 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2680 if (ret)
2681 goto out_free;
2682 if (resp_len > args.acl_len)
2683 nfs4_write_cached_acl(inode, NULL, resp_len);
2684 else
2685 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2686 if (buf) {
2687 ret = -ERANGE;
2688 if (resp_len > buflen)
2689 goto out_free;
2690 if (localpage)
2691 memcpy(buf, resp_buf, resp_len);
2692 }
2693 ret = resp_len;
2694out_free:
2695 if (localpage)
2696 __free_page(localpage);
aa1870af
BF		 2697 return ret;
2698}
2699
e50a1c2e
BF		 2700static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2701{
2702 struct nfs_server *server = NFS_SERVER(inode);
2703 int ret;
2704
2705 if (!nfs4_server_supports_acls(server))
2706 return -EOPNOTSUPP;
2707 ret = nfs_revalidate_inode(server, inode);
2708 if (ret < 0)
2709 return ret;
2710 ret = nfs4_read_cached_acl(inode, buf, buflen);
2711 if (ret != -ENOENT)
2712 return ret;
2713 return nfs4_get_acl_uncached(inode, buf, buflen);
2714}
2715
4b580ee3
BF		 2716static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2717{
2718 struct nfs_server *server = NFS_SERVER(inode);
2719 struct page *pages[NFS4ACL_MAXPAGES];
2720 struct nfs_setaclargs arg = {
2721 .fh = NFS_FH(inode),
2722 .acl_pages = pages,
2723 .acl_len = buflen,
2724 };
2725 struct rpc_message msg = {
2726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2727 .rpc_argp = &arg,
2728 .rpc_resp = NULL,
2729 };
2730 int ret;
2731
2732 if (!nfs4_server_supports_acls(server))
2733 return -EOPNOTSUPP;
642ac549 2734 nfs_inode_return_delegation(inode);
4b580ee3
BF		 2735 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2736 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
e50a1c2e
BF		 2737 if (ret == 0)
2738 nfs4_write_cached_acl(inode, buf, buflen);
4b580ee3
BF		 2739 return ret;
2740}
2741
1da177e4 2742static int
faf5f49c 2743nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4
LT		 2744{
2745 struct nfs4_client *clp = server->nfs4_state;
2746
2747 if (!clp || task->tk_status >= 0)
2748 return 0;
2749 switch(task->tk_status) {
2750 case -NFS4ERR_STALE_CLIENTID:
2751 case -NFS4ERR_STALE_STATEID:
2752 case -NFS4ERR_EXPIRED:
2753 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2754 nfs4_schedule_state_recovery(clp);
433fbe4c 2755 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2756 rpc_wake_up_task(task);
2757 task->tk_status = 0;
2758 return -EAGAIN;
1da177e4 2759 case -NFS4ERR_DELAY:
006ea73e
CL		 2760 nfs_inc_server_stats((struct nfs_server *) server,
2761 NFSIOS_DELAY);
2762 case -NFS4ERR_GRACE:
1da177e4
LT		 2763 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2764 task->tk_status = 0;
2765 return -EAGAIN;
2766 case -NFS4ERR_OLD_STATEID:
2767 task->tk_status = 0;
2768 return -EAGAIN;
2769 }
2770 task->tk_status = nfs4_map_errors(task->tk_status);
2771 return 0;
2772}
2773
433fbe4c
TM		 2774static int nfs4_wait_bit_interruptible(void *word)
2775{
2776 if (signal_pending(current))
2777 return -ERESTARTSYS;
2778 schedule();
2779 return 0;
2780}
2781
1da177e4
LT		 2782static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2783{
1da177e4 2784 sigset_t oldset;
433fbe4c 2785 int res;
1da177e4
LT		 2786
2787 might_sleep();
2788
2789 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2790 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2791 nfs4_wait_bit_interruptible,
2792 TASK_INTERRUPTIBLE);
1da177e4
LT		 2793 rpc_clnt_sigunmask(clnt, &oldset);
2794 return res;
2795}
2796
2797static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2798{
2799 sigset_t oldset;
2800 int res = 0;
2801
2802 might_sleep();
2803
2804 if (*timeout <= 0)
2805 *timeout = NFS4_POLL_RETRY_MIN;
2806 if (*timeout > NFS4_POLL_RETRY_MAX)
2807 *timeout = NFS4_POLL_RETRY_MAX;
2808 rpc_clnt_sigmask(clnt, &oldset);
2809 if (clnt->cl_intr) {
041e0e3b 2810 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2811 if (signalled())
2812 res = -ERESTARTSYS;
041e0e3b
NA		 2813 } else
2814 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2815 rpc_clnt_sigunmask(clnt, &oldset);
2816 *timeout <<= 1;
2817 return res;
2818}
2819
2820/* This is the error handling routine for processes that are allowed
2821 * to sleep.
2822 */
faf5f49c 2823int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4
LT		 2824{
2825 struct nfs4_client *clp = server->nfs4_state;
2826 int ret = errorcode;
2827
2828 exception->retry = 0;
2829 switch(errorcode) {
2830 case 0:
2831 return 0;
2832 case -NFS4ERR_STALE_CLIENTID:
2833 case -NFS4ERR_STALE_STATEID:
2834 case -NFS4ERR_EXPIRED:
433fbe4c 2835 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2836 ret = nfs4_wait_clnt_recover(server->client, clp);
2837 if (ret == 0)
2838 exception->retry = 1;
2839 break;
2840 case -NFS4ERR_GRACE:
2841 case -NFS4ERR_DELAY:
2842 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2843 if (ret != 0)
2844 break;
1da177e4 2845 case -NFS4ERR_OLD_STATEID:
2c56617d 2846 exception->retry = 1;
1da177e4
LT		 2847 }
2848 /* We failed to handle the error */
2849 return nfs4_map_errors(ret);
2850}
2851
286d7d6a 2852int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2853{
2854 nfs4_verifier sc_verifier;
2855 struct nfs4_setclientid setclientid = {
2856 .sc_verifier = &sc_verifier,
2857 .sc_prog = program,
2858 };
2859 struct rpc_message msg = {
2860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2861 .rpc_argp = &setclientid,
2862 .rpc_resp = clp,
286d7d6a 2863 .rpc_cred = cred,
1da177e4
LT		 2864 };
2865 u32 *p;
2866 int loop = 0;
2867 int status;
2868
2869 p = (u32*)sc_verifier.data;
2870 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2871 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2872
2873 for(;;) {
2874 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2875 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2876 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
286d7d6a 2877 cred->cr_ops->cr_name,
1da177e4
LT		 2878 clp->cl_id_uniquifier);
2879 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2880 sizeof(setclientid.sc_netid), "tcp");
2881 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2882 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2883 clp->cl_ipaddr, port >> 8, port & 255);
2884
2885 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2886 if (status != -NFS4ERR_CLID_INUSE)
2887 break;
2888 if (signalled())
2889 break;
2890 if (loop++ & 1)
2891 ssleep(clp->cl_lease_time + 1);
2892 else
2893 if (++clp->cl_id_uniquifier == 0)
2894 break;
2895 }
2896 return status;
2897}
2898
2899int
286d7d6a 2900nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2901{
2902 struct nfs_fsinfo fsinfo;
2903 struct rpc_message msg = {
2904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2905 .rpc_argp = clp,
2906 .rpc_resp = &fsinfo,
286d7d6a 2907 .rpc_cred = cred,
1da177e4
LT		 2908 };
2909 unsigned long now;
2910 int status;
2911
2912 now = jiffies;
2913 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2914 if (status == 0) {
2915 spin_lock(&clp->cl_lock);
2916 clp->cl_lease_time = fsinfo.lease_time * HZ;
2917 clp->cl_last_renewal = now;
58d9714a 2918 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2919 spin_unlock(&clp->cl_lock);
2920 }
2921 return status;
2922}
2923
fe650407
TM		 2924struct nfs4_delegreturndata {
2925 struct nfs4_delegreturnargs args;
fa178f29 2926 struct nfs4_delegreturnres res;
fe650407
TM		 2927 struct nfs_fh fh;
2928 nfs4_stateid stateid;
2929 struct rpc_cred *cred;
26e976a8 2930 unsigned long timestamp;
fa178f29 2931 struct nfs_fattr fattr;
fe650407
TM		 2932 int rpc_status;
2933};
2934
2935static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2936{
fe650407 2937 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 2938 struct rpc_message msg = {
2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 2940 .rpc_argp = &data->args,
fa178f29 2941 .rpc_resp = &data->res,
fe650407 2942 .rpc_cred = data->cred,
1da177e4 2943 };
fa178f29 2944 nfs_fattr_init(data->res.fattr);
fe650407
TM		 2945 rpc_call_setup(task, &msg, 0);
2946}
1da177e4 2947
fe650407
TM		 2948static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2949{
2950 struct nfs4_delegreturndata *data = calldata;
2951 data->rpc_status = task->tk_status;
26e976a8 2952 if (data->rpc_status == 0)
fa178f29 2953 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2954}
2955
2956static void nfs4_delegreturn_release(void *calldata)
2957{
2958 struct nfs4_delegreturndata *data = calldata;
2959
2960 put_rpccred(data->cred);
2961 kfree(calldata);
2962}
2963
c8d149f3 2964static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2965 .rpc_call_prepare = nfs4_delegreturn_prepare,
2966 .rpc_call_done = nfs4_delegreturn_done,
2967 .rpc_release = nfs4_delegreturn_release,
2968};
2969
2970static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2971{
2972 struct nfs4_delegreturndata *data;
fa178f29 2973 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 2974 struct rpc_task *task;
2975 int status;
2976
2977 data = kmalloc(sizeof(*data), GFP_KERNEL);
2978 if (data == NULL)
2979 return -ENOMEM;
2980 data->args.fhandle = &data->fh;
2981 data->args.stateid = &data->stateid;
fa178f29 2982 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 2983 nfs_copy_fh(&data->fh, NFS_FH(inode));
2984 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 2985 data->res.fattr = &data->fattr;
2986 data->res.server = server;
fe650407 2987 data->cred = get_rpccred(cred);
26e976a8 2988 data->timestamp = jiffies;
fe650407
TM		 2989 data->rpc_status = 0;
2990
2991 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
2992 if (IS_ERR(task)) {
2993 nfs4_delegreturn_release(data);
2994 return PTR_ERR(task);
2995 }
2996 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 2997 if (status == 0) {
fe650407 2998 status = data->rpc_status;
fa178f29
TM		 2999 if (status == 0)
3000 nfs_post_op_update_inode(inode, &data->fattr);
3001 }
fe650407
TM		 3002 rpc_release_task(task);
3003 return status;
1da177e4
LT		 3004}
3005
3006int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3007{
3008 struct nfs_server *server = NFS_SERVER(inode);
3009 struct nfs4_exception exception = { };
3010 int err;
3011 do {
3012 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3013 switch (err) {
3014 case -NFS4ERR_STALE_STATEID:
3015 case -NFS4ERR_EXPIRED:
3016 nfs4_schedule_state_recovery(server->nfs4_state);
3017 case 0:
3018 return 0;
3019 }
3020 err = nfs4_handle_exception(server, err, &exception);
3021 } while (exception.retry);
3022 return err;
3023}
3024
3025#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3026#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3027
3028/*
3029 * sleep, with exponential backoff, and retry the LOCK operation.
3030 */
3031static unsigned long
3032nfs4_set_lock_task_retry(unsigned long timeout)
3033{
041e0e3b 3034 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3035 timeout <<= 1;
3036 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3037 return NFS4_LOCK_MAXTIMEOUT;
3038 return timeout;
3039}
3040
1da177e4
LT		 3041static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3042{
3043 struct inode *inode = state->inode;
3044 struct nfs_server *server = NFS_SERVER(inode);
3045 struct nfs4_client *clp = server->nfs4_state;
911d1aaf 3046 struct nfs_lockt_args arg = {
1da177e4 3047 .fh = NFS_FH(inode),
911d1aaf 3048 .fl = request,
1da177e4 3049 };
911d1aaf
TM		 3050 struct nfs_lockt_res res = {
3051 .denied = request,
1da177e4
LT		 3052 };
3053 struct rpc_message msg = {
3054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3055 .rpc_argp = &arg,
3056 .rpc_resp = &res,
3057 .rpc_cred = state->owner->so_cred,
3058 };
1da177e4
LT		 3059 struct nfs4_lock_state *lsp;
3060 int status;
3061
3062 down_read(&clp->cl_sem);
911d1aaf 3063 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3064 status = nfs4_set_lock_state(state, request);
3065 if (status != 0)
3066 goto out;
3067 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3068 arg.lock_owner.id = lsp->ls_id;
1da177e4 3069 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3070 switch (status) {
3071 case 0:
3072 request->fl_type = F_UNLCK;
3073 break;
3074 case -NFS4ERR_DENIED:
3075 status = 0;
1da177e4 3076 }
8d0a8a9d 3077out:
1da177e4
LT		 3078 up_read(&clp->cl_sem);
3079 return status;
3080}
3081
3082static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3083{
3084 struct nfs4_exception exception = { };
3085 int err;
3086
3087 do {
3088 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3089 _nfs4_proc_getlk(state, cmd, request),
3090 &exception);
3091 } while (exception.retry);
3092 return err;
3093}
3094
3095static int do_vfs_lock(struct file *file, struct file_lock *fl)
3096{
3097 int res = 0;
3098 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3099 case FL_POSIX:
3100 res = posix_lock_file_wait(file, fl);
3101 break;
3102 case FL_FLOCK:
3103 res = flock_lock_file_wait(file, fl);
3104 break;
3105 default:
3106 BUG();
3107 }
3108 if (res < 0)
3109 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
3110 __FUNCTION__);
3111 return res;
3112}
3113
faf5f49c 3114struct nfs4_unlockdata {
911d1aaf
TM		 3115 struct nfs_locku_args arg;
3116 struct nfs_locku_res res;
faf5f49c
TM		 3117 struct nfs4_lock_state *lsp;
3118 struct nfs_open_context *ctx;
911d1aaf
TM		 3119 struct file_lock fl;
3120 const struct nfs_server *server;
26e976a8 3121 unsigned long timestamp;
faf5f49c
TM		 3122};
3123
911d1aaf
TM		 3124static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3125 struct nfs_open_context *ctx,
3126 struct nfs4_lock_state *lsp,
3127 struct nfs_seqid *seqid)
3128{
3129 struct nfs4_unlockdata *p;
3130 struct inode *inode = lsp->ls_state->inode;
3131
3132 p = kmalloc(sizeof(*p), GFP_KERNEL);
3133 if (p == NULL)
3134 return NULL;
3135 p->arg.fh = NFS_FH(inode);
3136 p->arg.fl = &p->fl;
3137 p->arg.seqid = seqid;
3138 p->arg.stateid = &lsp->ls_stateid;
3139 p->lsp = lsp;
3140 atomic_inc(&lsp->ls_count);
3141 /* Ensure we don't close file until we're done freeing locks! */
3142 p->ctx = get_nfs_open_context(ctx);
3143 memcpy(&p->fl, fl, sizeof(p->fl));
3144 p->server = NFS_SERVER(inode);
3145 return p;
3146}
3147
06f814a3 3148static void nfs4_locku_release_calldata(void *data)
faf5f49c 3149{
963d8fe5 3150 struct nfs4_unlockdata *calldata = data;
911d1aaf 3151 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3152 nfs4_put_lock_state(calldata->lsp);
3153 put_nfs_open_context(calldata->ctx);
3154 kfree(calldata);
faf5f49c
TM		 3155}
3156
963d8fe5 3157static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3158{
963d8fe5 3159 struct nfs4_unlockdata *calldata = data;
faf5f49c 3160
06f814a3
TM		 3161 if (RPC_ASSASSINATED(task))
3162 return;
911d1aaf 3163 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3164 switch (task->tk_status) {
3165 case 0:
3166 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3167 calldata->res.stateid.data,
faf5f49c 3168 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3169 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3170 break;
3171 case -NFS4ERR_STALE_STATEID:
3172 case -NFS4ERR_EXPIRED:
911d1aaf 3173 nfs4_schedule_state_recovery(calldata->server->nfs4_state);
faf5f49c
TM		 3174 break;
3175 default:
911d1aaf 3176 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
faf5f49c 3177 rpc_restart_call(task);
faf5f49c
TM		 3178 }
3179 }
faf5f49c
TM		 3180}
3181
4ce70ada 3182static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3183{
4ce70ada 3184 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3185 struct rpc_message msg = {
3186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3187 .rpc_argp = &calldata->arg,
3188 .rpc_resp = &calldata->res,
3189 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3190 };
faf5f49c 3191
911d1aaf 3192 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3193 return;
3194 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3195 /* Note: exit _without_ running nfs4_locku_done */
3196 task->tk_action = NULL;
faf5f49c
TM		 3197 return;
3198 }
26e976a8 3199 calldata->timestamp = jiffies;
faf5f49c
TM		 3200 rpc_call_setup(task, &msg, 0);
3201}
3202
963d8fe5 3203static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3204 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3205 .rpc_call_done = nfs4_locku_done,
06f814a3 3206 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3207};
3208
a5d16a4d
TM		 3209static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3210 struct nfs_open_context *ctx,
3211 struct nfs4_lock_state *lsp,
3212 struct nfs_seqid *seqid)
3213{
3214 struct nfs4_unlockdata *data;
3215 struct rpc_task *task;
3216
3217 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3218 if (data == NULL) {
3219 nfs_free_seqid(seqid);
3220 return ERR_PTR(-ENOMEM);
3221 }
3222
3223 /* Unlock _before_ we do the RPC call */
3224 do_vfs_lock(fl->fl_file, fl);
3225 task = rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3226 if (IS_ERR(task))
3227 nfs4_locku_release_calldata(data);
3228 return task;
3229}
3230
faf5f49c
TM		 3231static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3232{
911d1aaf 3233 struct nfs_seqid *seqid;
1da177e4 3234 struct nfs4_lock_state *lsp;
06f814a3
TM		 3235 struct rpc_task *task;
3236 int status = 0;
faf5f49c 3237
6bfc93ef
TM		 3238 /* Is this a delegated lock? */
3239 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
911d1aaf
TM		 3240 goto out_unlock;
3241 /* Is this open_owner holding any locks on the server? */
3242 if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
3243 goto out_unlock;
6bfc93ef 3244
8d0a8a9d
TM		 3245 status = nfs4_set_lock_state(state, request);
3246 if (status != 0)
911d1aaf 3247 goto out_unlock;
8d0a8a9d 3248 lsp = request->fl_u.nfs4_fl.owner;
06f814a3 3249 status = -ENOMEM;
911d1aaf
TM		 3250 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3251 if (seqid == NULL)
3252 goto out_unlock;
a5d16a4d
TM		 3253 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3254 status = PTR_ERR(task);
3255 if (IS_ERR(task))
3256 goto out_unlock;
3257 status = nfs4_wait_for_completion_rpc_task(task);
3258 rpc_release_task(task);
911d1aaf 3259 return status;
911d1aaf 3260out_unlock:
faf5f49c 3261 do_vfs_lock(request->fl_file, request);
1da177e4
LT		 3262 return status;
3263}
3264
a5d16a4d
TM		 3265struct nfs4_lockdata {
3266 struct nfs_lock_args arg;
3267 struct nfs_lock_res res;
3268 struct nfs4_lock_state *lsp;
3269 struct nfs_open_context *ctx;
3270 struct file_lock fl;
26e976a8 3271 unsigned long timestamp;
a5d16a4d
TM		 3272 int rpc_status;
3273 int cancelled;
3274};
3275
3276static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3277 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3278{
a5d16a4d
TM		 3279 struct nfs4_lockdata *p;
3280 struct inode *inode = lsp->ls_state->inode;
1da177e4 3281 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3282
3283 p = kzalloc(sizeof(*p), GFP_KERNEL);
3284 if (p == NULL)
3285 return NULL;
3286
3287 p->arg.fh = NFS_FH(inode);
3288 p->arg.fl = &p->fl;
3289 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3290 if (p->arg.lock_seqid == NULL)
3291 goto out_free;
3292 p->arg.lock_stateid = &lsp->ls_stateid;
3293 p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
3294 p->arg.lock_owner.id = lsp->ls_id;
3295 p->lsp = lsp;
3296 atomic_inc(&lsp->ls_count);
3297 p->ctx = get_nfs_open_context(ctx);
3298 memcpy(&p->fl, fl, sizeof(p->fl));
3299 return p;
3300out_free:
3301 kfree(p);
3302 return NULL;
3303}
3304
3305static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3306{
3307 struct nfs4_lockdata *data = calldata;
3308 struct nfs4_state *state = data->lsp->ls_state;
3309 struct nfs4_state_owner *sp = state->owner;
1da177e4 3310 struct rpc_message msg = {
a5d16a4d
TM		 3311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3312 .rpc_argp = &data->arg,
3313 .rpc_resp = &data->res,
3314 .rpc_cred = sp->so_cred,
1da177e4 3315 };
06735b34 3316
a5d16a4d
TM		 3317 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3318 return;
3319 dprintk("%s: begin!\n", __FUNCTION__);
3320 /* Do we need to do an open_to_lock_owner? */
3321 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3322 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3323 if (data->arg.open_seqid == NULL) {
3324 data->rpc_status = -ENOMEM;
3325 task->tk_action = NULL;
06735b34 3326 goto out;
8d0a8a9d 3327 }
a5d16a4d
TM		 3328 data->arg.open_stateid = &state->stateid;
3329 data->arg.new_lock_owner = 1;
3330 }
26e976a8 3331 data->timestamp = jiffies;
a5d16a4d 3332 rpc_call_setup(task, &msg, 0);
06735b34 3333out:
a5d16a4d
TM		 3334 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3335}
3336
3337static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3338{
3339 struct nfs4_lockdata *data = calldata;
3340
3341 dprintk("%s: begin!\n", __FUNCTION__);
3342
3343 data->rpc_status = task->tk_status;
3344 if (RPC_ASSASSINATED(task))
3345 goto out;
3346 if (data->arg.new_lock_owner != 0) {
3347 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3348 if (data->rpc_status == 0)
3349 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3350 else
3351 goto out;
3352 }
3353 if (data->rpc_status == 0) {
3354 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3355 sizeof(data->lsp->ls_stateid.data));
3356 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
26e976a8 3357 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3358 }
3359 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3360out:
3361 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3362}
3363
3364static void nfs4_lock_release(void *calldata)
3365{
3366 struct nfs4_lockdata *data = calldata;
3367
3368 dprintk("%s: begin!\n", __FUNCTION__);
3369 if (data->arg.open_seqid != NULL)
3370 nfs_free_seqid(data->arg.open_seqid);
3371 if (data->cancelled != 0) {
3372 struct rpc_task *task;
3373 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3374 data->arg.lock_seqid);
3375 if (!IS_ERR(task))
3376 rpc_release_task(task);
3377 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3378 } else
3379 nfs_free_seqid(data->arg.lock_seqid);
3380 nfs4_put_lock_state(data->lsp);
3381 put_nfs_open_context(data->ctx);
3382 kfree(data);
3383 dprintk("%s: done!\n", __FUNCTION__);
3384}
3385
3386static const struct rpc_call_ops nfs4_lock_ops = {
3387 .rpc_call_prepare = nfs4_lock_prepare,
3388 .rpc_call_done = nfs4_lock_done,
3389 .rpc_release = nfs4_lock_release,
3390};
3391
3392static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3393{
3394 struct nfs4_lockdata *data;
3395 struct rpc_task *task;
3396 int ret;
3397
3398 dprintk("%s: begin!\n", __FUNCTION__);
3399 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3400 fl->fl_u.nfs4_fl.owner);
3401 if (data == NULL)
3402 return -ENOMEM;
3403 if (IS_SETLKW(cmd))
3404 data->arg.block = 1;
3405 if (reclaim != 0)
3406 data->arg.reclaim = 1;
3407 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3408 &nfs4_lock_ops, data);
3409 if (IS_ERR(task)) {
3410 nfs4_lock_release(data);
3411 return PTR_ERR(task);
3412 }
3413 ret = nfs4_wait_for_completion_rpc_task(task);
3414 if (ret == 0) {
3415 ret = data->rpc_status;
3416 if (ret == -NFS4ERR_DENIED)
3417 ret = -EAGAIN;
3418 } else
3419 data->cancelled = 1;
3420 rpc_release_task(task);
3421 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3422 return ret;
1da177e4
LT		 3423}
3424
3425static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3426{
202b50dc
TM		 3427 struct nfs_server *server = NFS_SERVER(state->inode);
3428 struct nfs4_exception exception = { };
3429 int err;
3430
6bfc93ef
TM		 3431 /* Cache the lock if possible... */
3432 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3433 return 0;
202b50dc
TM		 3434 do {
3435 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3436 if (err != -NFS4ERR_DELAY)
3437 break;
3438 nfs4_handle_exception(server, err, &exception);
3439 } while (exception.retry);
3440 return err;
1da177e4
LT		 3441}
3442
3443static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3444{
202b50dc
TM		 3445 struct nfs_server *server = NFS_SERVER(state->inode);
3446 struct nfs4_exception exception = { };
3447 int err;
3448
6bfc93ef
TM		 3449 err = nfs4_set_lock_state(state, request);
3450 if (err != 0)
3451 return err;
202b50dc
TM		 3452 do {
3453 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3454 if (err != -NFS4ERR_DELAY)
3455 break;
3456 nfs4_handle_exception(server, err, &exception);
3457 } while (exception.retry);
3458 return err;
1da177e4
LT		 3459}
3460
3461static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3462{
3463 struct nfs4_client *clp = state->owner->so_client;
3464 int status;
3465
6bfc93ef 3466 /* Is this a delegated open? */
ff604066 3467 if (NFS_I(state->inode)->delegation_state != 0) {
6bfc93ef
TM		 3468 /* Yes: cache locks! */
3469 status = do_vfs_lock(request->fl_file, request);
3470 /* ...but avoid races with delegation recall... */
3471 if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
ff604066 3472 return status;
1da177e4 3473 }
ff604066 3474 down_read(&clp->cl_sem);
6bfc93ef
TM		 3475 status = nfs4_set_lock_state(state, request);
3476 if (status != 0)
3477 goto out;
3478 status = _nfs4_do_setlk(state, cmd, request, 0);
3479 if (status != 0)
3480 goto out;
3481 /* Note: we always want to sleep here! */
3482 request->fl_flags |= FL_SLEEP;
3483 if (do_vfs_lock(request->fl_file, request) < 0)
3484 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3485out:
1da177e4
LT		 3486 up_read(&clp->cl_sem);
3487 return status;
3488}
3489
3490static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3491{
3492 struct nfs4_exception exception = { };
3493 int err;
3494
3495 do {
3496 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3497 _nfs4_proc_setlk(state, cmd, request),
3498 &exception);
3499 } while (exception.retry);
3500 return err;
3501}
3502
3503static int
3504nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3505{
3506 struct nfs_open_context *ctx;
3507 struct nfs4_state *state;
3508 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3509 int status;
3510
3511 /* verify open state */
3512 ctx = (struct nfs_open_context *)filp->private_data;
3513 state = ctx->state;
3514
3515 if (request->fl_start < 0 || request->fl_end < 0)
3516 return -EINVAL;
3517
3518 if (IS_GETLK(cmd))
3519 return nfs4_proc_getlk(state, F_GETLK, request);
3520
3521 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3522 return -EINVAL;
3523
3524 if (request->fl_type == F_UNLCK)
3525 return nfs4_proc_unlck(state, cmd, request);
3526
3527 do {
3528 status = nfs4_proc_setlk(state, cmd, request);
3529 if ((status != -EAGAIN) || IS_SETLK(cmd))
3530 break;
3531 timeout = nfs4_set_lock_task_retry(timeout);
3532 status = -ERESTARTSYS;
3533 if (signalled())
3534 break;
3535 } while(status < 0);
1da177e4
LT		 3536 return status;
3537}
3538
888e694c
TM		 3539int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3540{
3541 struct nfs_server *server = NFS_SERVER(state->inode);
3542 struct nfs4_exception exception = { };
3543 int err;
3544
3545 err = nfs4_set_lock_state(state, fl);
3546 if (err != 0)
3547 goto out;
3548 do {
3549 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3550 if (err != -NFS4ERR_DELAY)
3551 break;
3552 err = nfs4_handle_exception(server, err, &exception);
3553 } while (exception.retry);
3554out:
3555 return err;
3556}
6b3b5496 3557
aa1870af
BF		 3558#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3559
6b3b5496
BF		 3560int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3561 size_t buflen, int flags)
3562{
4b580ee3
BF		 3563 struct inode *inode = dentry->d_inode;
3564
3565 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3566 return -EOPNOTSUPP;
3567
3568 if (!S_ISREG(inode->i_mode) &&
3569 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3570 return -EPERM;
3571
3572 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3573}
3574
3575/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3576 * and that's what we'll do for e.g. user attributes that haven't been set.
3577 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3578 * attributes in kernel-managed attribute namespaces. */
3579ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3580 size_t buflen)
3581{
aa1870af
BF		 3582 struct inode *inode = dentry->d_inode;
3583
3584 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3585 return -EOPNOTSUPP;
3586
3587 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3588}
3589
3590ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3591{
aa1870af 3592 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496
BF		 3593
3594 if (buf && buflen < len)
3595 return -ERANGE;
3596 if (buf)
aa1870af
BF		 3597 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3598 return len;
6b3b5496
BF		 3599}
3600
1da177e4
LT		 3601struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3602 .recover_open = nfs4_open_reclaim,
3603 .recover_lock = nfs4_lock_reclaim,
3604};
3605
3606struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3607 .recover_open = nfs4_open_expired,
3608 .recover_lock = nfs4_lock_expired,
3609};
3610
6b3b5496
BF		 3611static struct inode_operations nfs4_file_inode_operations = {
3612 .permission = nfs_permission,
3613 .getattr = nfs_getattr,
3614 .setattr = nfs_setattr,
3615 .getxattr = nfs4_getxattr,
3616 .setxattr = nfs4_setxattr,
3617 .listxattr = nfs4_listxattr,
3618};
3619
1da177e4
LT		 3620struct nfs_rpc_ops nfs_v4_clientops = {
3621 .version = 4, /* protocol version */
3622 .dentry_ops = &nfs4_dentry_operations,
3623 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3624 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3625 .getroot = nfs4_proc_get_root,
3626 .getattr = nfs4_proc_getattr,
3627 .setattr = nfs4_proc_setattr,
3628 .lookup = nfs4_proc_lookup,
3629 .access = nfs4_proc_access,
3630 .readlink = nfs4_proc_readlink,
3631 .read = nfs4_proc_read,
3632 .write = nfs4_proc_write,
3633 .commit = nfs4_proc_commit,
3634 .create = nfs4_proc_create,
3635 .remove = nfs4_proc_remove,
3636 .unlink_setup = nfs4_proc_unlink_setup,
3637 .unlink_done = nfs4_proc_unlink_done,
3638 .rename = nfs4_proc_rename,
3639 .link = nfs4_proc_link,
3640 .symlink = nfs4_proc_symlink,
3641 .mkdir = nfs4_proc_mkdir,
3642 .rmdir = nfs4_proc_remove,
3643 .readdir = nfs4_proc_readdir,
3644 .mknod = nfs4_proc_mknod,
3645 .statfs = nfs4_proc_statfs,
3646 .fsinfo = nfs4_proc_fsinfo,
3647 .pathconf = nfs4_proc_pathconf,
3648 .decode_dirent = nfs4_decode_dirent,
3649 .read_setup = nfs4_proc_read_setup,
3650 .write_setup = nfs4_proc_write_setup,
3651 .commit_setup = nfs4_proc_commit_setup,
02a913a7
TM		 3652 .file_open = nfs_open,
3653 .file_release = nfs_release,
1da177e4 3654 .lock = nfs4_proc_lock,
e50a1c2e 3655 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3656};
3657
3658/*
3659 * Local variables:
3660 * c-basic-offset: 8
3661 * End:
3662 */
Linux 6.x block layer and io_uring tree(s)