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NFSv4: Decode mounted_on_fileid attribute in getattr.
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
006ea73e 54#include "iostat.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
58#define NFS4_POLL_RETRY_MIN (1*HZ)
59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
cdd4e68b 61struct nfs4_opendata;
864472e9 62static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 63static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 64static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
1da177e4 65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
faf5f49c 66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
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
38478b24 188static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 189{
38478b24 190 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 191
38478b24
TM		 192 spin_lock(&dir->i_lock);
193 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
1da177e4
LT		 194 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
195 nfsi->change_attr = cinfo->after;
38478b24 196 spin_unlock(&dir->i_lock);
1da177e4
LT		 197}
198
e56e0b78 199struct nfs4_opendata {
24ac23ab 200 atomic_t count;
e56e0b78
TM		 201 struct nfs_openargs o_arg;
202 struct nfs_openres o_res;
cdd4e68b
TM		 203 struct nfs_open_confirmargs c_arg;
204 struct nfs_open_confirmres c_res;
e56e0b78
TM		 205 struct nfs_fattr f_attr;
206 struct nfs_fattr dir_attr;
207 struct dentry *dentry;
208 struct dentry *dir;
209 struct nfs4_state_owner *owner;
210 struct iattr attrs;
26e976a8 211 unsigned long timestamp;
24ac23ab
TM		 212 int rpc_status;
213 int cancelled;
e56e0b78
TM		 214};
215
216static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
217 struct nfs4_state_owner *sp, int flags,
218 const struct iattr *attrs)
219{
220 struct dentry *parent = dget_parent(dentry);
221 struct inode *dir = parent->d_inode;
222 struct nfs_server *server = NFS_SERVER(dir);
223 struct nfs4_opendata *p;
224
225 p = kzalloc(sizeof(*p), GFP_KERNEL);
226 if (p == NULL)
227 goto err;
228 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
229 if (p->o_arg.seqid == NULL)
230 goto err_free;
24ac23ab 231 atomic_set(&p->count, 1);
e56e0b78
TM		 232 p->dentry = dget(dentry);
233 p->dir = parent;
234 p->owner = sp;
235 atomic_inc(&sp->so_count);
236 p->o_arg.fh = NFS_FH(dir);
237 p->o_arg.open_flags = flags,
238 p->o_arg.clientid = server->nfs4_state->cl_clientid;
239 p->o_arg.id = sp->so_id;
240 p->o_arg.name = &dentry->d_name;
241 p->o_arg.server = server;
242 p->o_arg.bitmask = server->attr_bitmask;
243 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
244 p->o_res.f_attr = &p->f_attr;
245 p->o_res.dir_attr = &p->dir_attr;
246 p->o_res.server = server;
247 nfs_fattr_init(&p->f_attr);
248 nfs_fattr_init(&p->dir_attr);
249 if (flags & O_EXCL) {
250 u32 *s = (u32 *) p->o_arg.u.verifier.data;
251 s[0] = jiffies;
252 s[1] = current->pid;
253 } else if (flags & O_CREAT) {
254 p->o_arg.u.attrs = &p->attrs;
255 memcpy(&p->attrs, attrs, sizeof(p->attrs));
256 }
cdd4e68b
TM		 257 p->c_arg.fh = &p->o_res.fh;
258 p->c_arg.stateid = &p->o_res.stateid;
259 p->c_arg.seqid = p->o_arg.seqid;
e56e0b78
TM		 260 return p;
261err_free:
262 kfree(p);
263err:
264 dput(parent);
265 return NULL;
266}
267
268static void nfs4_opendata_free(struct nfs4_opendata *p)
269{
24ac23ab 270 if (p != NULL && atomic_dec_and_test(&p->count)) {
e56e0b78
TM		 271 nfs_free_seqid(p->o_arg.seqid);
272 nfs4_put_state_owner(p->owner);
273 dput(p->dir);
274 dput(p->dentry);
275 kfree(p);
276 }
277}
278
9512135d 279/* Helper for asynchronous RPC calls */
4ce70ada 280static int nfs4_call_async(struct rpc_clnt *clnt,
963d8fe5 281 const struct rpc_call_ops *tk_ops, void *calldata)
9512135d
TM		 282{
283 struct rpc_task *task;
284
963d8fe5 285 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
9512135d 286 return -ENOMEM;
9512135d
TM		 287 rpc_execute(task);
288 return 0;
289}
290
06f814a3
TM		 291static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
292{
293 sigset_t oldset;
294 int ret;
295
296 rpc_clnt_sigmask(task->tk_client, &oldset);
297 ret = rpc_wait_for_completion_task(task);
298 rpc_clnt_sigunmask(task->tk_client, &oldset);
299 return ret;
300}
301
e7616923
TM		 302static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
303{
304 switch (open_flags) {
305 case FMODE_WRITE:
306 state->n_wronly++;
307 break;
308 case FMODE_READ:
309 state->n_rdonly++;
310 break;
311 case FMODE_READ|FMODE_WRITE:
312 state->n_rdwr++;
313 }
314}
315
1da177e4
LT		 316static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
317{
318 struct inode *inode = state->inode;
319
320 open_flags &= (FMODE_READ|FMODE_WRITE);
d530838b 321 /* Protect against nfs4_find_state_byowner() */
ec073428 322 spin_lock(&state->owner->so_lock);
1da177e4 323 spin_lock(&inode->i_lock);
4cecb76f 324 memcpy(&state->stateid, stateid, sizeof(state->stateid));
e7616923 325 update_open_stateflags(state, open_flags);
4cecb76f 326 nfs4_state_set_mode_locked(state, state->state | open_flags);
1da177e4 327 spin_unlock(&inode->i_lock);
ec073428 328 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 329}
330
24ac23ab
TM		 331static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
332{
333 struct inode *inode;
334 struct nfs4_state *state = NULL;
335
336 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
337 goto out;
338 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
03f28e3a 339 if (IS_ERR(inode))
24ac23ab
TM		 340 goto out;
341 state = nfs4_get_open_state(inode, data->owner);
342 if (state == NULL)
343 goto put_inode;
344 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
345put_inode:
346 iput(inode);
347out:
348 return state;
349}
350
864472e9
TM		 351static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
352{
353 struct nfs_inode *nfsi = NFS_I(state->inode);
354 struct nfs_open_context *ctx;
355
356 spin_lock(&state->inode->i_lock);
357 list_for_each_entry(ctx, &nfsi->open_files, list) {
358 if (ctx->state != state)
359 continue;
360 get_nfs_open_context(ctx);
361 spin_unlock(&state->inode->i_lock);
362 return ctx;
363 }
364 spin_unlock(&state->inode->i_lock);
365 return ERR_PTR(-ENOENT);
366}
367
368static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
369{
370 int ret;
371
372 opendata->o_arg.open_flags = openflags;
373 ret = _nfs4_proc_open(opendata);
374 if (ret != 0)
375 return ret;
376 memcpy(stateid->data, opendata->o_res.stateid.data,
377 sizeof(stateid->data));
378 return 0;
379}
380
381static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
382{
383 nfs4_stateid stateid;
384 struct nfs4_state *newstate;
385 int mode = 0;
386 int delegation = 0;
387 int ret;
388
389 /* memory barrier prior to reading state->n_* */
390 smp_rmb();
391 if (state->n_rdwr != 0) {
392 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
393 if (ret != 0)
394 return ret;
395 mode |= FMODE_READ|FMODE_WRITE;
396 if (opendata->o_res.delegation_type != 0)
397 delegation = opendata->o_res.delegation_type;
398 smp_rmb();
399 }
400 if (state->n_wronly != 0) {
401 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
402 if (ret != 0)
403 return ret;
404 mode |= FMODE_WRITE;
405 if (opendata->o_res.delegation_type != 0)
406 delegation = opendata->o_res.delegation_type;
407 smp_rmb();
408 }
409 if (state->n_rdonly != 0) {
410 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
411 if (ret != 0)
412 return ret;
413 mode |= FMODE_READ;
414 }
415 clear_bit(NFS_DELEGATED_STATE, &state->flags);
416 if (mode == 0)
417 return 0;
418 if (opendata->o_res.delegation_type == 0)
419 opendata->o_res.delegation_type = delegation;
420 opendata->o_arg.open_flags |= mode;
421 newstate = nfs4_opendata_to_nfs4_state(opendata);
422 if (newstate != NULL) {
423 if (opendata->o_res.delegation_type != 0) {
424 struct nfs_inode *nfsi = NFS_I(newstate->inode);
425 int delegation_flags = 0;
426 if (nfsi->delegation)
427 delegation_flags = nfsi->delegation->flags;
428 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
429 nfs_inode_set_delegation(newstate->inode,
430 opendata->owner->so_cred,
431 &opendata->o_res);
432 else
433 nfs_inode_reclaim_delegation(newstate->inode,
434 opendata->owner->so_cred,
435 &opendata->o_res);
436 }
437 nfs4_close_state(newstate, opendata->o_arg.open_flags);
438 }
439 if (newstate != state)
440 return -ESTALE;
441 return 0;
442}
443
1da177e4
LT		 444/*
445 * OPEN_RECLAIM:
446 * reclaim state on the server after a reboot.
1da177e4 447 */
864472e9 448static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4 449{
864472e9
TM		 450 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
451 struct nfs4_opendata *opendata;
452 int delegation_type = 0;
1da177e4
LT		 453 int status;
454
455 if (delegation != NULL) {
456 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
457 memcpy(&state->stateid, &delegation->stateid,
458 sizeof(state->stateid));
459 set_bit(NFS_DELEGATED_STATE, &state->flags);
460 return 0;
461 }
864472e9 462 delegation_type = delegation->type;
1da177e4 463 }
864472e9
TM		 464 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
465 if (opendata == NULL)
cee54fc9 466 return -ENOMEM;
864472e9
TM		 467 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
468 opendata->o_arg.fh = NFS_FH(state->inode);
469 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
470 opendata->o_arg.u.delegation_type = delegation_type;
471 status = nfs4_open_recover(opendata, state);
472 nfs4_opendata_free(opendata);
1da177e4
LT		 473 return status;
474}
475
864472e9 476static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
1da177e4
LT		 477{
478 struct nfs_server *server = NFS_SERVER(state->inode);
479 struct nfs4_exception exception = { };
480 int err;
481 do {
864472e9 482 err = _nfs4_do_open_reclaim(sp, state, dentry);
202b50dc
TM		 483 if (err != -NFS4ERR_DELAY)
484 break;
485 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 486 } while (exception.retry);
487 return err;
488}
489
864472e9
TM		 490static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
491{
492 struct nfs_open_context *ctx;
493 int ret;
494
495 ctx = nfs4_state_find_open_context(state);
496 if (IS_ERR(ctx))
497 return PTR_ERR(ctx);
498 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
499 put_nfs_open_context(ctx);
500 return ret;
501}
502
1da177e4
LT		 503static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
504{
505 struct nfs4_state_owner *sp = state->owner;
e56e0b78 506 struct nfs4_opendata *opendata;
864472e9 507 int ret;
1da177e4 508
1da177e4 509 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
864472e9
TM		 510 return 0;
511 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
e56e0b78 512 if (opendata == NULL)
864472e9 513 return -ENOMEM;
e56e0b78 514 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
e56e0b78
TM		 515 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
516 sizeof(opendata->o_arg.u.delegation.data));
864472e9 517 ret = nfs4_open_recover(opendata, state);
e56e0b78 518 nfs4_opendata_free(opendata);
864472e9 519 return ret;
1da177e4
LT		 520}
521
522int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
523{
524 struct nfs4_exception exception = { };
525 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
526 int err;
527 do {
528 err = _nfs4_open_delegation_recall(dentry, state);
529 switch (err) {
530 case 0:
531 return err;
532 case -NFS4ERR_STALE_CLIENTID:
533 case -NFS4ERR_STALE_STATEID:
534 case -NFS4ERR_EXPIRED:
535 /* Don't recall a delegation if it was lost */
536 nfs4_schedule_state_recovery(server->nfs4_state);
537 return err;
538 }
539 err = nfs4_handle_exception(server, err, &exception);
540 } while (exception.retry);
541 return err;
542}
543
cdd4e68b 544static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 545{
cdd4e68b
TM		 546 struct nfs4_opendata *data = calldata;
547 struct rpc_message msg = {
548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
549 .rpc_argp = &data->c_arg,
550 .rpc_resp = &data->c_res,
551 .rpc_cred = data->owner->so_cred,
1da177e4 552 };
26e976a8 553 data->timestamp = jiffies;
cdd4e68b
TM		 554 rpc_call_setup(task, &msg, 0);
555}
556
557static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
558{
559 struct nfs4_opendata *data = calldata;
560
561 data->rpc_status = task->tk_status;
562 if (RPC_ASSASSINATED(task))
563 return;
26e976a8 564 if (data->rpc_status == 0) {
cdd4e68b
TM		 565 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
566 sizeof(data->o_res.stateid.data));
26e976a8
TM		 567 renew_lease(data->o_res.server, data->timestamp);
568 }
cdd4e68b
TM		 569 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
570 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
571}
572
573static void nfs4_open_confirm_release(void *calldata)
574{
575 struct nfs4_opendata *data = calldata;
576 struct nfs4_state *state = NULL;
577
578 /* If this request hasn't been cancelled, do nothing */
579 if (data->cancelled == 0)
580 goto out_free;
581 /* In case of error, no cleanup! */
582 if (data->rpc_status != 0)
583 goto out_free;
584 nfs_confirm_seqid(&data->owner->so_seqid, 0);
585 state = nfs4_opendata_to_nfs4_state(data);
586 if (state != NULL)
587 nfs4_close_state(state, data->o_arg.open_flags);
588out_free:
589 nfs4_opendata_free(data);
590}
591
592static const struct rpc_call_ops nfs4_open_confirm_ops = {
593 .rpc_call_prepare = nfs4_open_confirm_prepare,
594 .rpc_call_done = nfs4_open_confirm_done,
595 .rpc_release = nfs4_open_confirm_release,
596};
597
598/*
599 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
600 */
601static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
602{
603 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
604 struct rpc_task *task;
1da177e4
LT		 605 int status;
606
cdd4e68b 607 atomic_inc(&data->count);
7a1218a2
TM		 608 /*
609 * If rpc_run_task() ends up calling ->rpc_release(), we
610 * want to ensure that it takes the 'error' code path.
611 */
612 data->rpc_status = -ENOMEM;
cdd4e68b 613 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
7a1218a2 614 if (IS_ERR(task))
cdd4e68b 615 return PTR_ERR(task);
cdd4e68b
TM		 616 status = nfs4_wait_for_completion_rpc_task(task);
617 if (status != 0) {
618 data->cancelled = 1;
619 smp_wmb();
620 } else
621 status = data->rpc_status;
622 rpc_release_task(task);
1da177e4
LT		 623 return status;
624}
625
24ac23ab 626static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 627{
24ac23ab
TM		 628 struct nfs4_opendata *data = calldata;
629 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 630 struct rpc_message msg = {
631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 632 .rpc_argp = &data->o_arg,
633 .rpc_resp = &data->o_res,
1da177e4
LT		 634 .rpc_cred = sp->so_cred,
635 };
24ac23ab
TM		 636
637 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
638 return;
639 /* Update sequence id. */
640 data->o_arg.id = sp->so_id;
641 data->o_arg.clientid = sp->so_client->cl_clientid;
864472e9
TM		 642 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
643 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
26e976a8 644 data->timestamp = jiffies;
24ac23ab
TM		 645 rpc_call_setup(task, &msg, 0);
646}
1da177e4 647
24ac23ab
TM		 648static void nfs4_open_done(struct rpc_task *task, void *calldata)
649{
650 struct nfs4_opendata *data = calldata;
1da177e4 651
24ac23ab
TM		 652 data->rpc_status = task->tk_status;
653 if (RPC_ASSASSINATED(task))
654 return;
655 if (task->tk_status == 0) {
656 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 657 case S_IFREG:
658 break;
659 case S_IFLNK:
24ac23ab 660 data->rpc_status = -ELOOP;
6f926b5b
TM		 661 break;
662 case S_IFDIR:
24ac23ab 663 data->rpc_status = -EISDIR;
6f926b5b
TM		 664 break;
665 default:
24ac23ab 666 data->rpc_status = -ENOTDIR;
6f926b5b 667 }
26e976a8 668 renew_lease(data->o_res.server, data->timestamp);
6f926b5b 669 }
24ac23ab
TM		 670 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
671}
6f926b5b 672
24ac23ab
TM		 673static void nfs4_open_release(void *calldata)
674{
675 struct nfs4_opendata *data = calldata;
676 struct nfs4_state *state = NULL;
677
678 /* If this request hasn't been cancelled, do nothing */
679 if (data->cancelled == 0)
680 goto out_free;
681 /* In case of error, no cleanup! */
682 if (data->rpc_status != 0)
683 goto out_free;
684 /* In case we need an open_confirm, no cleanup! */
685 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
686 goto out_free;
687 nfs_confirm_seqid(&data->owner->so_seqid, 0);
688 state = nfs4_opendata_to_nfs4_state(data);
689 if (state != NULL)
690 nfs4_close_state(state, data->o_arg.open_flags);
691out_free:
692 nfs4_opendata_free(data);
693}
694
695static const struct rpc_call_ops nfs4_open_ops = {
696 .rpc_call_prepare = nfs4_open_prepare,
697 .rpc_call_done = nfs4_open_done,
698 .rpc_release = nfs4_open_release,
699};
700
701/*
702 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
703 */
704static int _nfs4_proc_open(struct nfs4_opendata *data)
705{
706 struct inode *dir = data->dir->d_inode;
707 struct nfs_server *server = NFS_SERVER(dir);
708 struct nfs_openargs *o_arg = &data->o_arg;
709 struct nfs_openres *o_res = &data->o_res;
710 struct rpc_task *task;
711 int status;
712
713 atomic_inc(&data->count);
7a1218a2
TM		 714 /*
715 * If rpc_run_task() ends up calling ->rpc_release(), we
716 * want to ensure that it takes the 'error' code path.
717 */
718 data->rpc_status = -ENOMEM;
24ac23ab 719 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
7a1218a2 720 if (IS_ERR(task))
24ac23ab 721 return PTR_ERR(task);
24ac23ab
TM		 722 status = nfs4_wait_for_completion_rpc_task(task);
723 if (status != 0) {
724 data->cancelled = 1;
725 smp_wmb();
726 } else
727 status = data->rpc_status;
728 rpc_release_task(task);
1da177e4 729 if (status != 0)
24ac23ab
TM		 730 return status;
731
56ae19f3
TM		 732 if (o_arg->open_flags & O_CREAT) {
733 update_changeattr(dir, &o_res->cinfo);
734 nfs_post_op_update_inode(dir, o_res->dir_attr);
735 } else
736 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 737 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 738 status = _nfs4_proc_open_confirm(data);
1da177e4 739 if (status != 0)
24ac23ab 740 return status;
1da177e4 741 }
24ac23ab 742 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1da177e4 743 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
24ac23ab
TM		 744 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
745 return 0;
1da177e4
LT		 746}
747
748static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
749{
750 struct nfs_access_entry cache;
751 int mask = 0;
752 int status;
753
754 if (openflags & FMODE_READ)
755 mask |= MAY_READ;
756 if (openflags & FMODE_WRITE)
757 mask |= MAY_WRITE;
758 status = nfs_access_get_cached(inode, cred, &cache);
759 if (status == 0)
760 goto out;
761
762 /* Be clever: ask server to check for all possible rights */
763 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
764 cache.cred = cred;
765 cache.jiffies = jiffies;
766 status = _nfs4_proc_access(inode, &cache);
767 if (status != 0)
768 return status;
769 nfs_access_add_cache(inode, &cache);
770out:
771 if ((cache.mask & mask) == mask)
772 return 0;
773 return -EACCES;
774}
775
58d9714a
TM		 776int nfs4_recover_expired_lease(struct nfs_server *server)
777{
778 struct nfs4_client *clp = server->nfs4_state;
779
780 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
781 nfs4_schedule_state_recovery(clp);
782 return nfs4_wait_clnt_recover(server->client, clp);
783}
784
1da177e4
LT		 785/*
786 * OPEN_EXPIRED:
787 * reclaim state on the server after a network partition.
788 * Assumes caller holds the appropriate lock
789 */
790static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
791{
1da177e4 792 struct inode *inode = state->inode;
1da177e4 793 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
e56e0b78 794 struct nfs4_opendata *opendata;
24ac23ab 795 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
864472e9 796 int ret;
1da177e4
LT		 797
798 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
864472e9
TM		 799 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
800 if (ret < 0)
801 return ret;
1da177e4
LT		 802 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
803 set_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9 804 return 0;
1da177e4 805 }
24ac23ab 806 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
e56e0b78 807 if (opendata == NULL)
864472e9
TM		 808 return -ENOMEM;
809 ret = nfs4_open_recover(opendata, state);
810 if (ret == -ESTALE) {
811 /* Invalidate the state owner so we don't ever use it again */
812 nfs4_drop_state_owner(sp);
813 d_drop(dentry);
1da177e4 814 }
e56e0b78 815 nfs4_opendata_free(opendata);
864472e9 816 return ret;
1da177e4
LT		 817}
818
202b50dc
TM		 819static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
820{
821 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
822 struct nfs4_exception exception = { };
823 int err;
824
825 do {
826 err = _nfs4_open_expired(sp, state, dentry);
827 if (err == -NFS4ERR_DELAY)
828 nfs4_handle_exception(server, err, &exception);
829 } while (exception.retry);
830 return err;
831}
832
1da177e4
LT		 833static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
834{
1da177e4 835 struct nfs_open_context *ctx;
864472e9 836 int ret;
1da177e4 837
864472e9
TM		 838 ctx = nfs4_state_find_open_context(state);
839 if (IS_ERR(ctx))
840 return PTR_ERR(ctx);
841 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
842 put_nfs_open_context(ctx);
843 return ret;
1da177e4
LT		 844}
845
846/*
24ac23ab 847 * Returns a referenced nfs4_state if there is an open delegation on the file
1da177e4
LT		 848 */
849static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
850{
851 struct nfs_delegation *delegation;
852 struct nfs_server *server = NFS_SERVER(inode);
853 struct nfs4_client *clp = server->nfs4_state;
854 struct nfs_inode *nfsi = NFS_I(inode);
855 struct nfs4_state_owner *sp = NULL;
856 struct nfs4_state *state = NULL;
857 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
858 int err;
859
b4454fe1
TM		 860 err = -ENOMEM;
861 if (!(sp = nfs4_get_state_owner(server, cred))) {
862 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
863 return err;
864 }
58d9714a
TM		 865 err = nfs4_recover_expired_lease(server);
866 if (err != 0)
b4454fe1 867 goto out_put_state_owner;
1da177e4
LT		 868 /* Protect against reboot recovery - NOTE ORDER! */
869 down_read(&clp->cl_sem);
870 /* Protect against delegation recall */
871 down_read(&nfsi->rwsem);
872 delegation = NFS_I(inode)->delegation;
873 err = -ENOENT;
874 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
875 goto out_err;
876 err = -ENOMEM;
1da177e4
LT		 877 state = nfs4_get_open_state(inode, sp);
878 if (state == NULL)
879 goto out_err;
880
881 err = -ENOENT;
882 if ((state->state & open_flags) == open_flags) {
883 spin_lock(&inode->i_lock);
e7616923 884 update_open_stateflags(state, open_flags);
1da177e4
LT		 885 spin_unlock(&inode->i_lock);
886 goto out_ok;
887 } else if (state->state != 0)
b4454fe1 888 goto out_put_open_state;
1da177e4
LT		 889
890 lock_kernel();
891 err = _nfs4_do_access(inode, cred, open_flags);
892 unlock_kernel();
893 if (err != 0)
b4454fe1 894 goto out_put_open_state;
1da177e4
LT		 895 set_bit(NFS_DELEGATED_STATE, &state->flags);
896 update_open_stateid(state, &delegation->stateid, open_flags);
897out_ok:
1da177e4
LT		 898 nfs4_put_state_owner(sp);
899 up_read(&nfsi->rwsem);
900 up_read(&clp->cl_sem);
1da177e4 901 *res = state;
b4454fe1
TM		 902 return 0;
903out_put_open_state:
904 nfs4_put_open_state(state);
1da177e4 905out_err:
1da177e4
LT		 906 up_read(&nfsi->rwsem);
907 up_read(&clp->cl_sem);
b8e5c4c2
TM		 908 if (err != -EACCES)
909 nfs_inode_return_delegation(inode);
b4454fe1
TM		 910out_put_state_owner:
911 nfs4_put_state_owner(sp);
1da177e4
LT		 912 return err;
913}
914
915static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
916{
917 struct nfs4_exception exception = { };
a162a6b8 918 struct nfs4_state *res = ERR_PTR(-EIO);
1da177e4
LT		 919 int err;
920
921 do {
922 err = _nfs4_open_delegated(inode, flags, cred, &res);
923 if (err == 0)
924 break;
925 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
926 err, &exception));
927 } while (exception.retry);
928 return res;
929}
930
931/*
24ac23ab 932 * Returns a referenced nfs4_state
1da177e4
LT		 933 */
934static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
935{
936 struct nfs4_state_owner *sp;
937 struct nfs4_state *state = NULL;
938 struct nfs_server *server = NFS_SERVER(dir);
939 struct nfs4_client *clp = server->nfs4_state;
e56e0b78 940 struct nfs4_opendata *opendata;
1da177e4 941 int status;
1da177e4
LT		 942
943 /* Protect against reboot recovery conflicts */
1da177e4
LT		 944 status = -ENOMEM;
945 if (!(sp = nfs4_get_state_owner(server, cred))) {
946 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
947 goto out_err;
948 }
58d9714a
TM		 949 status = nfs4_recover_expired_lease(server);
950 if (status != 0)
b4454fe1 951 goto err_put_state_owner;
58d9714a
TM		 952 down_read(&clp->cl_sem);
953 status = -ENOMEM;
e56e0b78
TM		 954 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
955 if (opendata == NULL)
956 goto err_put_state_owner;
1da177e4 957
24ac23ab 958 status = _nfs4_proc_open(opendata);
1da177e4 959 if (status != 0)
e56e0b78 960 goto err_opendata_free;
1da177e4
LT		 961
962 status = -ENOMEM;
24ac23ab
TM		 963 state = nfs4_opendata_to_nfs4_state(opendata);
964 if (state == NULL)
e56e0b78 965 goto err_opendata_free;
e56e0b78 966 if (opendata->o_res.delegation_type != 0)
24ac23ab 967 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
e56e0b78 968 nfs4_opendata_free(opendata);
1da177e4
LT		 969 nfs4_put_state_owner(sp);
970 up_read(&clp->cl_sem);
971 *res = state;
972 return 0;
e56e0b78
TM		 973err_opendata_free:
974 nfs4_opendata_free(opendata);
975err_put_state_owner:
976 nfs4_put_state_owner(sp);
1da177e4 977out_err:
1da177e4
LT		 978 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
979 up_read(&clp->cl_sem);
1da177e4
LT		 980 *res = NULL;
981 return status;
982}
983
984
985static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
986{
987 struct nfs4_exception exception = { };
988 struct nfs4_state *res;
989 int status;
990
991 do {
992 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
993 if (status == 0)
994 break;
995 /* NOTE: BAD_SEQID means the server and client disagree about the
996 * book-keeping w.r.t. state-changing operations
997 * (OPEN/CLOSE/LOCK/LOCKU...)
998 * It is actually a sign of a bug on the client or on the server.
999 *
1000 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1001 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1002 * have unhashed the old state_owner for us, and that we can
1003 * therefore safely retry using a new one. We should still warn
1004 * the user though...
1005 */
1006 if (status == -NFS4ERR_BAD_SEQID) {
1007 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1008 exception.retry = 1;
1009 continue;
1010 }
550f5747
TM		 1011 /*
1012 * BAD_STATEID on OPEN means that the server cancelled our
1013 * state before it received the OPEN_CONFIRM.
1014 * Recover by retrying the request as per the discussion
1015 * on Page 181 of RFC3530.
1016 */
1017 if (status == -NFS4ERR_BAD_STATEID) {
1018 exception.retry = 1;
1019 continue;
1020 }
1da177e4
LT		 1021 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1022 status, &exception));
1023 } while (exception.retry);
1024 return res;
1025}
1026
3e4f6290
TM		 1027static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1028 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1029{
3e4f6290 1030 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1031 struct nfs_setattrargs arg = {
3e4f6290 1032 .fh = NFS_FH(inode),
1da177e4
LT		 1033 .iap = sattr,
1034 .server = server,
1035 .bitmask = server->attr_bitmask,
1036 };
1037 struct nfs_setattrres res = {
1038 .fattr = fattr,
1039 .server = server,
1040 };
1041 struct rpc_message msg = {
1042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1043 .rpc_argp = &arg,
1044 .rpc_resp = &res,
1045 };
26e976a8 1046 unsigned long timestamp = jiffies;
65e4308d 1047 int status;
1da177e4 1048
0e574af1 1049 nfs_fattr_init(fattr);
1da177e4 1050
3e4f6290
TM		 1051 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1052 /* Use that stateid */
1053 } else if (state != NULL) {
1da177e4 1054 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1055 nfs4_copy_stateid(&arg.stateid, state, current->files);
1056 } else
1da177e4
LT		 1057 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1058
65e4308d 1059 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1060 if (status == 0 && state != NULL)
1061 renew_lease(server, timestamp);
65e4308d 1062 return status;
1da177e4
LT		 1063}
1064
3e4f6290
TM		 1065static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1066 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1067{
3e4f6290 1068 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1069 struct nfs4_exception exception = { };
1070 int err;
1071 do {
1072 err = nfs4_handle_exception(server,
3e4f6290 1073 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1074 &exception);
1075 } while (exception.retry);
1076 return err;
1077}
1078
1079struct nfs4_closedata {
1080 struct inode *inode;
1081 struct nfs4_state *state;
1082 struct nfs_closeargs arg;
1083 struct nfs_closeres res;
516a6af6 1084 struct nfs_fattr fattr;
26e976a8 1085 unsigned long timestamp;
1da177e4
LT		 1086};
1087
963d8fe5 1088static void nfs4_free_closedata(void *data)
9512135d 1089{
963d8fe5
TM		 1090 struct nfs4_closedata *calldata = data;
1091 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1092
1093 nfs4_put_open_state(calldata->state);
1094 nfs_free_seqid(calldata->arg.seqid);
9512135d 1095 nfs4_put_state_owner(sp);
9512135d
TM		 1096 kfree(calldata);
1097}
1098
963d8fe5 1099static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1100{
963d8fe5 1101 struct nfs4_closedata *calldata = data;
1da177e4 1102 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1103 struct nfs_server *server = NFS_SERVER(calldata->inode);
1104
4ce70ada
TM		 1105 if (RPC_ASSASSINATED(task))
1106 return;
1da177e4
LT		 1107 /* hmm. we are done with the inode, and in the process of freeing
1108 * the state_owner. we keep this around to process errors
1109 */
cee54fc9 1110 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1111 switch (task->tk_status) {
1112 case 0:
1113 memcpy(&state->stateid, &calldata->res.stateid,
1114 sizeof(state->stateid));
26e976a8 1115 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1116 break;
1117 case -NFS4ERR_STALE_STATEID:
1118 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1119 nfs4_schedule_state_recovery(server->nfs4_state);
1120 break;
1121 default:
1122 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1123 rpc_restart_call(task);
1124 return;
1125 }
1126 }
516a6af6 1127 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1128}
1129
4ce70ada 1130static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1131{
4ce70ada 1132 struct nfs4_closedata *calldata = data;
9512135d 1133 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1134 struct rpc_message msg = {
1135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1136 .rpc_argp = &calldata->arg,
1137 .rpc_resp = &calldata->res,
9512135d 1138 .rpc_cred = state->owner->so_cred,
1da177e4 1139 };
4cecb76f 1140 int mode = 0, old_mode;
9512135d 1141
963d8fe5 1142 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1143 return;
9512135d
TM		 1144 /* Recalculate the new open mode in case someone reopened the file
1145 * while we were waiting in line to be scheduled.
1146 */
4cecb76f
TM		 1147 spin_lock(&state->owner->so_lock);
1148 spin_lock(&calldata->inode->i_lock);
1149 mode = old_mode = state->state;
e7616923
TM		 1150 if (state->n_rdwr == 0) {
1151 if (state->n_rdonly == 0)
1152 mode &= ~FMODE_READ;
1153 if (state->n_wronly == 0)
1154 mode &= ~FMODE_WRITE;
1155 }
4cecb76f
TM		 1156 nfs4_state_set_mode_locked(state, mode);
1157 spin_unlock(&calldata->inode->i_lock);
1158 spin_unlock(&state->owner->so_lock);
1159 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
963d8fe5
TM		 1160 /* Note: exit _without_ calling nfs4_close_done */
1161 task->tk_action = NULL;
9512135d
TM		 1162 return;
1163 }
516a6af6 1164 nfs_fattr_init(calldata->res.fattr);
9512135d 1165 if (mode != 0)
1da177e4 1166 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d 1167 calldata->arg.open_flags = mode;
26e976a8 1168 calldata->timestamp = jiffies;
9512135d 1169 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1170}
1171
963d8fe5 1172static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1173 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1174 .rpc_call_done = nfs4_close_done,
1175 .rpc_release = nfs4_free_closedata,
1176};
1177
1da177e4
LT		 1178/*
1179 * It is possible for data to be read/written from a mem-mapped file
1180 * after the sys_close call (which hits the vfs layer as a flush).
1181 * This means that we can't safely call nfsv4 close on a file until
1182 * the inode is cleared. This in turn means that we are not good
1183 * NFSv4 citizens - we do not indicate to the server to update the file's
1184 * share state even when we are done with one of the three share
1185 * stateid's in the inode.
1186 *
1187 * NOTE: Caller must be holding the sp->so_owner semaphore!
1188 */
4cecb76f 1189int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1da177e4 1190{
516a6af6 1191 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1192 struct nfs4_closedata *calldata;
9512135d 1193 int status = -ENOMEM;
1da177e4 1194
9512135d 1195 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1196 if (calldata == NULL)
9512135d 1197 goto out;
1da177e4
LT		 1198 calldata->inode = inode;
1199 calldata->state = state;
1200 calldata->arg.fh = NFS_FH(inode);
9512135d 1201 calldata->arg.stateid = &state->stateid;
1da177e4 1202 /* Serialization for the sequence id */
cee54fc9 1203 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1204 if (calldata->arg.seqid == NULL)
1205 goto out_free_calldata;
516a6af6
TM		 1206 calldata->arg.bitmask = server->attr_bitmask;
1207 calldata->res.fattr = &calldata->fattr;
1208 calldata->res.server = server;
9512135d 1209
4ce70ada 1210 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
9512135d
TM		 1211 if (status == 0)
1212 goto out;
1213
1214 nfs_free_seqid(calldata->arg.seqid);
1215out_free_calldata:
1216 kfree(calldata);
1217out:
1218 return status;
1da177e4
LT		 1219}
1220
95cf959b 1221static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
02a913a7
TM		 1222{
1223 struct file *filp;
1224
1225 filp = lookup_instantiate_filp(nd, dentry, NULL);
1226 if (!IS_ERR(filp)) {
1227 struct nfs_open_context *ctx;
1228 ctx = (struct nfs_open_context *)filp->private_data;
1229 ctx->state = state;
95cf959b
TM		 1230 return 0;
1231 }
1232 nfs4_close_state(state, nd->intent.open.flags);
1233 return PTR_ERR(filp);
02a913a7
TM		 1234}
1235
1236struct dentry *
1da177e4
LT		 1237nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1238{
1239 struct iattr attr;
1240 struct rpc_cred *cred;
1241 struct nfs4_state *state;
02a913a7 1242 struct dentry *res;
1da177e4
LT		 1243
1244 if (nd->flags & LOOKUP_CREATE) {
1245 attr.ia_mode = nd->intent.open.create_mode;
1246 attr.ia_valid = ATTR_MODE;
1247 if (!IS_POSIXACL(dir))
1248 attr.ia_mode &= ~current->fs->umask;
1249 } else {
1250 attr.ia_valid = 0;
1251 BUG_ON(nd->intent.open.flags & O_CREAT);
1252 }
1253
1254 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1255 if (IS_ERR(cred))
02a913a7 1256 return (struct dentry *)cred;
1da177e4
LT		 1257 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1258 put_rpccred(cred);
02a913a7
TM		 1259 if (IS_ERR(state)) {
1260 if (PTR_ERR(state) == -ENOENT)
1261 d_add(dentry, NULL);
1262 return (struct dentry *)state;
1263 }
24ac23ab 1264 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM		 1265 if (res != NULL)
1266 dentry = res;
1267 nfs4_intent_set_file(nd, dentry, state);
1268 return res;
1da177e4
LT		 1269}
1270
1271int
02a913a7 1272nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4
LT		 1273{
1274 struct rpc_cred *cred;
1275 struct nfs4_state *state;
1da177e4
LT		 1276
1277 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1278 if (IS_ERR(cred))
1279 return PTR_ERR(cred);
1280 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1281 if (IS_ERR(state))
1282 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1283 put_rpccred(cred);
02a913a7
TM		 1284 if (IS_ERR(state)) {
1285 switch (PTR_ERR(state)) {
1286 case -EPERM:
1287 case -EACCES:
1288 case -EDQUOT:
1289 case -ENOSPC:
1290 case -EROFS:
1291 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1292 return 1;
1293 case -ENOENT:
1294 if (dentry->d_inode == NULL)
1295 return 1;
1296 }
1297 goto out_drop;
1298 }
24ac23ab 1299 if (state->inode == dentry->d_inode) {
02a913a7 1300 nfs4_intent_set_file(nd, dentry, state);
1da177e4
LT		 1301 return 1;
1302 }
1da177e4 1303 nfs4_close_state(state, openflags);
02a913a7
TM		 1304out_drop:
1305 d_drop(dentry);
1da177e4
LT		 1306 return 0;
1307}
1308
1309
1310static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1311{
1312 struct nfs4_server_caps_res res = {};
1313 struct rpc_message msg = {
1314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1315 .rpc_argp = fhandle,
1316 .rpc_resp = &res,
1317 };
1318 int status;
1319
1320 status = rpc_call_sync(server->client, &msg, 0);
1321 if (status == 0) {
1322 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1323 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1324 server->caps |= NFS_CAP_ACLS;
1325 if (res.has_links != 0)
1326 server->caps |= NFS_CAP_HARDLINKS;
1327 if (res.has_symlinks != 0)
1328 server->caps |= NFS_CAP_SYMLINKS;
1329 server->acl_bitmask = res.acl_bitmask;
1330 }
1331 return status;
1332}
1333
55a97593 1334int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1335{
1336 struct nfs4_exception exception = { };
1337 int err;
1338 do {
1339 err = nfs4_handle_exception(server,
1340 _nfs4_server_capabilities(server, fhandle),
1341 &exception);
1342 } while (exception.retry);
1343 return err;
1344}
1345
1346static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1347 struct nfs_fsinfo *info)
1348{
1da177e4
LT		 1349 struct nfs4_lookup_root_arg args = {
1350 .bitmask = nfs4_fattr_bitmap,
1351 };
1352 struct nfs4_lookup_res res = {
1353 .server = server,
0e574af1 1354 .fattr = info->fattr,
1da177e4
LT		 1355 .fh = fhandle,
1356 };
1357 struct rpc_message msg = {
1358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1359 .rpc_argp = &args,
1360 .rpc_resp = &res,
1361 };
0e574af1 1362 nfs_fattr_init(info->fattr);
1da177e4
LT		 1363 return rpc_call_sync(server->client, &msg, 0);
1364}
1365
1366static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1367 struct nfs_fsinfo *info)
1368{
1369 struct nfs4_exception exception = { };
1370 int err;
1371 do {
1372 err = nfs4_handle_exception(server,
1373 _nfs4_lookup_root(server, fhandle, info),
1374 &exception);
1375 } while (exception.retry);
1376 return err;
1377}
1378
1379static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1380 struct nfs_fsinfo *info)
1381{
1382 struct nfs_fattr * fattr = info->fattr;
1383 unsigned char * p;
1384 struct qstr q;
1385 struct nfs4_lookup_arg args = {
1386 .dir_fh = fhandle,
1387 .name = &q,
1388 .bitmask = nfs4_fattr_bitmap,
1389 };
1390 struct nfs4_lookup_res res = {
1391 .server = server,
1392 .fattr = fattr,
1393 .fh = fhandle,
1394 };
1395 struct rpc_message msg = {
1396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1397 .rpc_argp = &args,
1398 .rpc_resp = &res,
1399 };
1400 int status;
1401
1402 /*
1403 * Now we do a separate LOOKUP for each component of the mount path.
1404 * The LOOKUPs are done separately so that we can conveniently
1405 * catch an ERR_WRONGSEC if it occurs along the way...
1406 */
1407 status = nfs4_lookup_root(server, fhandle, info);
1408 if (status)
1409 goto out;
1410
1411 p = server->mnt_path;
1412 for (;;) {
1413 struct nfs4_exception exception = { };
1414
1415 while (*p == '/')
1416 p++;
1417 if (!*p)
1418 break;
1419 q.name = p;
1420 while (*p && (*p != '/'))
1421 p++;
1422 q.len = p - q.name;
1423
1424 do {
0e574af1 1425 nfs_fattr_init(fattr);
1da177e4
LT		 1426 status = nfs4_handle_exception(server,
1427 rpc_call_sync(server->client, &msg, 0),
1428 &exception);
1429 } while (exception.retry);
1430 if (status == 0)
1431 continue;
1432 if (status == -ENOENT) {
1433 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1434 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1435 }
1436 break;
1437 }
1438 if (status == 0)
1439 status = nfs4_server_capabilities(server, fhandle);
1440 if (status == 0)
1441 status = nfs4_do_fsinfo(server, fhandle, info);
1442out:
c12e87f4 1443 return nfs4_map_errors(status);
1da177e4
LT		 1444}
1445
1446static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1447{
1448 struct nfs4_getattr_arg args = {
1449 .fh = fhandle,
1450 .bitmask = server->attr_bitmask,
1451 };
1452 struct nfs4_getattr_res res = {
1453 .fattr = fattr,
1454 .server = server,
1455 };
1456 struct rpc_message msg = {
1457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1458 .rpc_argp = &args,
1459 .rpc_resp = &res,
1460 };
1461
0e574af1 1462 nfs_fattr_init(fattr);
1da177e4
LT		 1463 return rpc_call_sync(server->client, &msg, 0);
1464}
1465
1466static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1467{
1468 struct nfs4_exception exception = { };
1469 int err;
1470 do {
1471 err = nfs4_handle_exception(server,
1472 _nfs4_proc_getattr(server, fhandle, fattr),
1473 &exception);
1474 } while (exception.retry);
1475 return err;
1476}
1477
1478/*
1479 * The file is not closed if it is opened due to the a request to change
1480 * the size of the file. The open call will not be needed once the
1481 * VFS layer lookup-intents are implemented.
1482 *
1483 * Close is called when the inode is destroyed.
1484 * If we haven't opened the file for O_WRONLY, we
1485 * need to in the size_change case to obtain a stateid.
1486 *
1487 * Got race?
1488 * Because OPEN is always done by name in nfsv4, it is
1489 * possible that we opened a different file by the same
1490 * name. We can recognize this race condition, but we
1491 * can't do anything about it besides returning an error.
1492 *
1493 * This will be fixed with VFS changes (lookup-intent).
1494 */
1495static int
1496nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1497 struct iattr *sattr)
1498{
08e9eac4
TM		 1499 struct rpc_cred *cred;
1500 struct inode *inode = dentry->d_inode;
d530838b
TM		 1501 struct nfs_open_context *ctx;
1502 struct nfs4_state *state = NULL;
1da177e4
LT		 1503 int status;
1504
0e574af1 1505 nfs_fattr_init(fattr);
1da177e4 1506
08e9eac4
TM		 1507 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1508 if (IS_ERR(cred))
1509 return PTR_ERR(cred);
d530838b
TM		 1510
1511 /* Search for an existing open(O_WRITE) file */
1512 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1513 if (ctx != NULL)
1514 state = ctx->state;
08e9eac4 1515
3e4f6290 1516 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1517 if (status == 0)
1518 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1519 if (ctx != NULL)
1520 put_nfs_open_context(ctx);
08e9eac4 1521 put_rpccred(cred);
1da177e4
LT		 1522 return status;
1523}
1524
1525static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1526 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1527{
1528 int status;
1529 struct nfs_server *server = NFS_SERVER(dir);
1530 struct nfs4_lookup_arg args = {
1531 .bitmask = server->attr_bitmask,
1532 .dir_fh = NFS_FH(dir),
1533 .name = name,
1534 };
1535 struct nfs4_lookup_res res = {
1536 .server = server,
1537 .fattr = fattr,
1538 .fh = fhandle,
1539 };
1540 struct rpc_message msg = {
1541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1542 .rpc_argp = &args,
1543 .rpc_resp = &res,
1544 };
1545
0e574af1 1546 nfs_fattr_init(fattr);
1da177e4
LT		 1547
1548 dprintk("NFS call lookup %s\n", name->name);
1549 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1550 dprintk("NFS reply lookup: %d\n", status);
1551 return status;
1552}
1553
1554static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1555{
1556 struct nfs4_exception exception = { };
1557 int err;
1558 do {
1559 err = nfs4_handle_exception(NFS_SERVER(dir),
1560 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1561 &exception);
1562 } while (exception.retry);
1563 return err;
1564}
1565
1566static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1567{
1568 struct nfs4_accessargs args = {
1569 .fh = NFS_FH(inode),
1570 };
1571 struct nfs4_accessres res = { 0 };
1572 struct rpc_message msg = {
1573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1574 .rpc_argp = &args,
1575 .rpc_resp = &res,
1576 .rpc_cred = entry->cred,
1577 };
1578 int mode = entry->mask;
1579 int status;
1580
1581 /*
1582 * Determine which access bits we want to ask for...
1583 */
1584 if (mode & MAY_READ)
1585 args.access |= NFS4_ACCESS_READ;
1586 if (S_ISDIR(inode->i_mode)) {
1587 if (mode & MAY_WRITE)
1588 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1589 if (mode & MAY_EXEC)
1590 args.access |= NFS4_ACCESS_LOOKUP;
1591 } else {
1592 if (mode & MAY_WRITE)
1593 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1594 if (mode & MAY_EXEC)
1595 args.access |= NFS4_ACCESS_EXECUTE;
1596 }
1597 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1598 if (!status) {
1599 entry->mask = 0;
1600 if (res.access & NFS4_ACCESS_READ)
1601 entry->mask |= MAY_READ;
1602 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1603 entry->mask |= MAY_WRITE;
1604 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1605 entry->mask |= MAY_EXEC;
1606 }
1607 return status;
1608}
1609
1610static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1611{
1612 struct nfs4_exception exception = { };
1613 int err;
1614 do {
1615 err = nfs4_handle_exception(NFS_SERVER(inode),
1616 _nfs4_proc_access(inode, entry),
1617 &exception);
1618 } while (exception.retry);
1619 return err;
1620}
1621
1622/*
1623 * TODO: For the time being, we don't try to get any attributes
1624 * along with any of the zero-copy operations READ, READDIR,
1625 * READLINK, WRITE.
1626 *
1627 * In the case of the first three, we want to put the GETATTR
1628 * after the read-type operation -- this is because it is hard
1629 * to predict the length of a GETATTR response in v4, and thus
1630 * align the READ data correctly. This means that the GETATTR
1631 * may end up partially falling into the page cache, and we should
1632 * shift it into the 'tail' of the xdr_buf before processing.
1633 * To do this efficiently, we need to know the total length
1634 * of data received, which doesn't seem to be available outside
1635 * of the RPC layer.
1636 *
1637 * In the case of WRITE, we also want to put the GETATTR after
1638 * the operation -- in this case because we want to make sure
1639 * we get the post-operation mtime and size. This means that
1640 * we can't use xdr_encode_pages() as written: we need a variant
1641 * of it which would leave room in the 'tail' iovec.
1642 *
1643 * Both of these changes to the XDR layer would in fact be quite
1644 * minor, but I decided to leave them for a subsequent patch.
1645 */
1646static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1647 unsigned int pgbase, unsigned int pglen)
1648{
1649 struct nfs4_readlink args = {
1650 .fh = NFS_FH(inode),
1651 .pgbase = pgbase,
1652 .pglen = pglen,
1653 .pages = &page,
1654 };
1655 struct rpc_message msg = {
1656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1657 .rpc_argp = &args,
1658 .rpc_resp = NULL,
1659 };
1660
1661 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1662}
1663
1664static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1665 unsigned int pgbase, unsigned int pglen)
1666{
1667 struct nfs4_exception exception = { };
1668 int err;
1669 do {
1670 err = nfs4_handle_exception(NFS_SERVER(inode),
1671 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1672 &exception);
1673 } while (exception.retry);
1674 return err;
1675}
1676
1677static int _nfs4_proc_read(struct nfs_read_data *rdata)
1678{
1679 int flags = rdata->flags;
1680 struct inode *inode = rdata->inode;
1681 struct nfs_fattr *fattr = rdata->res.fattr;
1682 struct nfs_server *server = NFS_SERVER(inode);
1683 struct rpc_message msg = {
1684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1685 .rpc_argp = &rdata->args,
1686 .rpc_resp = &rdata->res,
1687 .rpc_cred = rdata->cred,
1688 };
1689 unsigned long timestamp = jiffies;
1690 int status;
1691
1692 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1693 (long long) rdata->args.offset);
1694
0e574af1 1695 nfs_fattr_init(fattr);
1da177e4
LT		 1696 status = rpc_call_sync(server->client, &msg, flags);
1697 if (!status)
1698 renew_lease(server, timestamp);
1699 dprintk("NFS reply read: %d\n", status);
1700 return status;
1701}
1702
1703static int nfs4_proc_read(struct nfs_read_data *rdata)
1704{
1705 struct nfs4_exception exception = { };
1706 int err;
1707 do {
1708 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1709 _nfs4_proc_read(rdata),
1710 &exception);
1711 } while (exception.retry);
1712 return err;
1713}
1714
1715static int _nfs4_proc_write(struct nfs_write_data *wdata)
1716{
1717 int rpcflags = wdata->flags;
1718 struct inode *inode = wdata->inode;
1719 struct nfs_fattr *fattr = wdata->res.fattr;
1720 struct nfs_server *server = NFS_SERVER(inode);
1721 struct rpc_message msg = {
1722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1723 .rpc_argp = &wdata->args,
1724 .rpc_resp = &wdata->res,
1725 .rpc_cred = wdata->cred,
1726 };
1727 int status;
1728
1729 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1730 (long long) wdata->args.offset);
1731
3b6efee9
TM		 1732 wdata->args.bitmask = server->attr_bitmask;
1733 wdata->res.server = server;
26e976a8 1734 wdata->timestamp = jiffies;
0e574af1 1735 nfs_fattr_init(fattr);
1da177e4
LT		 1736 status = rpc_call_sync(server->client, &msg, rpcflags);
1737 dprintk("NFS reply write: %d\n", status);
3b6efee9
TM		 1738 if (status < 0)
1739 return status;
26e976a8 1740 renew_lease(server, wdata->timestamp);
3b6efee9
TM		 1741 nfs_post_op_update_inode(inode, fattr);
1742 return wdata->res.count;
1da177e4
LT		 1743}
1744
1745static int nfs4_proc_write(struct nfs_write_data *wdata)
1746{
1747 struct nfs4_exception exception = { };
1748 int err;
1749 do {
1750 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1751 _nfs4_proc_write(wdata),
1752 &exception);
1753 } while (exception.retry);
1754 return err;
1755}
1756
1757static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1758{
1759 struct inode *inode = cdata->inode;
1760 struct nfs_fattr *fattr = cdata->res.fattr;
1761 struct nfs_server *server = NFS_SERVER(inode);
1762 struct rpc_message msg = {
1763 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1764 .rpc_argp = &cdata->args,
1765 .rpc_resp = &cdata->res,
1766 .rpc_cred = cdata->cred,
1767 };
1768 int status;
1769
1770 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1771 (long long) cdata->args.offset);
1772
3b6efee9
TM		 1773 cdata->args.bitmask = server->attr_bitmask;
1774 cdata->res.server = server;
26e976a8 1775 cdata->timestamp = jiffies;
0e574af1 1776 nfs_fattr_init(fattr);
1da177e4 1777 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1778 if (status >= 0)
1779 renew_lease(server, cdata->timestamp);
1da177e4 1780 dprintk("NFS reply commit: %d\n", status);
3b6efee9
TM		 1781 if (status >= 0)
1782 nfs_post_op_update_inode(inode, fattr);
1da177e4
LT		 1783 return status;
1784}
1785
1786static int nfs4_proc_commit(struct nfs_write_data *cdata)
1787{
1788 struct nfs4_exception exception = { };
1789 int err;
1790 do {
1791 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1792 _nfs4_proc_commit(cdata),
1793 &exception);
1794 } while (exception.retry);
1795 return err;
1796}
1797
1798/*
1799 * Got race?
1800 * We will need to arrange for the VFS layer to provide an atomic open.
1801 * Until then, this create/open method is prone to inefficiency and race
1802 * conditions due to the lookup, create, and open VFS calls from sys_open()
1803 * placed on the wire.
1804 *
1805 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1806 * The file will be opened again in the subsequent VFS open call
1807 * (nfs4_proc_file_open).
1808 *
1809 * The open for read will just hang around to be used by any process that
1810 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1811 */
1812
1813static int
1814nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1815 int flags, struct nameidata *nd)
1da177e4
LT		 1816{
1817 struct nfs4_state *state;
1818 struct rpc_cred *cred;
1819 int status = 0;
1820
1821 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1822 if (IS_ERR(cred)) {
1823 status = PTR_ERR(cred);
1824 goto out;
1825 }
1826 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1827 put_rpccred(cred);
1828 if (IS_ERR(state)) {
1829 status = PTR_ERR(state);
1830 goto out;
1831 }
24ac23ab 1832 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1833 if (flags & O_EXCL) {
1834 struct nfs_fattr fattr;
3e4f6290 1835 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1836 if (status == 0)
65e4308d 1837 nfs_setattr_update_inode(state->inode, sattr);
02a913a7
TM		 1838 }
1839 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
95cf959b 1840 status = nfs4_intent_set_file(nd, dentry, state);
02a913a7
TM		 1841 else
1842 nfs4_close_state(state, flags);
1da177e4
LT		 1843out:
1844 return status;
1845}
1846
1847static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1848{
16e42959 1849 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 1850 struct nfs4_remove_arg args = {
1851 .fh = NFS_FH(dir),
1852 .name = name,
16e42959
TM		 1853 .bitmask = server->attr_bitmask,
1854 };
1855 struct nfs_fattr dir_attr;
1856 struct nfs4_remove_res res = {
1857 .server = server,
1858 .dir_attr = &dir_attr,
1da177e4 1859 };
1da177e4
LT		 1860 struct rpc_message msg = {
1861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1862 .rpc_argp = &args,
1863 .rpc_resp = &res,
1864 };
1865 int status;
1866
16e42959
TM		 1867 nfs_fattr_init(res.dir_attr);
1868 status = rpc_call_sync(server->client, &msg, 0);
1869 if (status == 0) {
1870 update_changeattr(dir, &res.cinfo);
1871 nfs_post_op_update_inode(dir, res.dir_attr);
1872 }
1da177e4
LT		 1873 return status;
1874}
1875
1876static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1877{
1878 struct nfs4_exception exception = { };
1879 int err;
1880 do {
1881 err = nfs4_handle_exception(NFS_SERVER(dir),
1882 _nfs4_proc_remove(dir, name),
1883 &exception);
1884 } while (exception.retry);
1885 return err;
1886}
1887
1888struct unlink_desc {
1889 struct nfs4_remove_arg args;
16e42959
TM		 1890 struct nfs4_remove_res res;
1891 struct nfs_fattr dir_attr;
1da177e4
LT		 1892};
1893
1894static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1895 struct qstr *name)
1896{
16e42959 1897 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1da177e4
LT		 1898 struct unlink_desc *up;
1899
1900 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1901 if (!up)
1902 return -ENOMEM;
1903
1904 up->args.fh = NFS_FH(dir->d_inode);
1905 up->args.name = name;
16e42959
TM		 1906 up->args.bitmask = server->attr_bitmask;
1907 up->res.server = server;
1908 up->res.dir_attr = &up->dir_attr;
1da177e4
LT		 1909
1910 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1911 msg->rpc_argp = &up->args;
1912 msg->rpc_resp = &up->res;
1913 return 0;
1914}
1915
1916static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1917{
1918 struct rpc_message *msg = &task->tk_msg;
1919 struct unlink_desc *up;
1920
1921 if (msg->rpc_resp != NULL) {
1922 up = container_of(msg->rpc_resp, struct unlink_desc, res);
16e42959
TM		 1923 update_changeattr(dir->d_inode, &up->res.cinfo);
1924 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1da177e4
LT		 1925 kfree(up);
1926 msg->rpc_resp = NULL;
1927 msg->rpc_argp = NULL;
1928 }
1929 return 0;
1930}
1931
1932static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1933 struct inode *new_dir, struct qstr *new_name)
1934{
6caf2c82 1935 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1936 struct nfs4_rename_arg arg = {
1937 .old_dir = NFS_FH(old_dir),
1938 .new_dir = NFS_FH(new_dir),
1939 .old_name = old_name,
1940 .new_name = new_name,
6caf2c82
TM		 1941 .bitmask = server->attr_bitmask,
1942 };
1943 struct nfs_fattr old_fattr, new_fattr;
1944 struct nfs4_rename_res res = {
1945 .server = server,
1946 .old_fattr = &old_fattr,
1947 .new_fattr = &new_fattr,
1da177e4 1948 };
1da177e4
LT		 1949 struct rpc_message msg = {
1950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1951 .rpc_argp = &arg,
1952 .rpc_resp = &res,
1953 };
1954 int status;
1955
6caf2c82
TM		 1956 nfs_fattr_init(res.old_fattr);
1957 nfs_fattr_init(res.new_fattr);
1958 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 1959
1960 if (!status) {
1961 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 1962 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 1963 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 1964 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 1965 }
1966 return status;
1967}
1968
1969static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1970 struct inode *new_dir, struct qstr *new_name)
1971{
1972 struct nfs4_exception exception = { };
1973 int err;
1974 do {
1975 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1976 _nfs4_proc_rename(old_dir, old_name,
1977 new_dir, new_name),
1978 &exception);
1979 } while (exception.retry);
1980 return err;
1981}
1982
1983static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1984{
91ba2eee 1985 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1986 struct nfs4_link_arg arg = {
1987 .fh = NFS_FH(inode),
1988 .dir_fh = NFS_FH(dir),
1989 .name = name,
91ba2eee
TM		 1990 .bitmask = server->attr_bitmask,
1991 };
1992 struct nfs_fattr fattr, dir_attr;
1993 struct nfs4_link_res res = {
1994 .server = server,
1995 .fattr = &fattr,
1996 .dir_attr = &dir_attr,
1da177e4 1997 };
1da177e4
LT		 1998 struct rpc_message msg = {
1999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2000 .rpc_argp = &arg,
91ba2eee 2001 .rpc_resp = &res,
1da177e4
LT		 2002 };
2003 int status;
2004
91ba2eee
TM		 2005 nfs_fattr_init(res.fattr);
2006 nfs_fattr_init(res.dir_attr);
2007 status = rpc_call_sync(server->client, &msg, 0);
2008 if (!status) {
2009 update_changeattr(dir, &res.cinfo);
2010 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2011 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2012 }
1da177e4
LT		 2013
2014 return status;
2015}
2016
2017static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2018{
2019 struct nfs4_exception exception = { };
2020 int err;
2021 do {
2022 err = nfs4_handle_exception(NFS_SERVER(inode),
2023 _nfs4_proc_link(inode, dir, name),
2024 &exception);
2025 } while (exception.retry);
2026 return err;
2027}
2028
2029static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2030 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2031 struct nfs_fattr *fattr)
2032{
2033 struct nfs_server *server = NFS_SERVER(dir);
56ae19f3 2034 struct nfs_fattr dir_fattr;
1da177e4
LT		 2035 struct nfs4_create_arg arg = {
2036 .dir_fh = NFS_FH(dir),
2037 .server = server,
2038 .name = name,
2039 .attrs = sattr,
2040 .ftype = NF4LNK,
2041 .bitmask = server->attr_bitmask,
2042 };
2043 struct nfs4_create_res res = {
2044 .server = server,
2045 .fh = fhandle,
2046 .fattr = fattr,
56ae19f3 2047 .dir_fattr = &dir_fattr,
1da177e4
LT		 2048 };
2049 struct rpc_message msg = {
2050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2051 .rpc_argp = &arg,
2052 .rpc_resp = &res,
2053 };
2054 int status;
2055
2056 if (path->len > NFS4_MAXPATHLEN)
2057 return -ENAMETOOLONG;
2058 arg.u.symlink = path;
0e574af1 2059 nfs_fattr_init(fattr);
56ae19f3 2060 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2061
2062 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2063 if (!status)
2064 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2065 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2066 return status;
2067}
2068
2069static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2070 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2071 struct nfs_fattr *fattr)
2072{
2073 struct nfs4_exception exception = { };
2074 int err;
2075 do {
2076 err = nfs4_handle_exception(NFS_SERVER(dir),
2077 _nfs4_proc_symlink(dir, name, path, sattr,
2078 fhandle, fattr),
2079 &exception);
2080 } while (exception.retry);
2081 return err;
2082}
2083
2084static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2085 struct iattr *sattr)
2086{
2087 struct nfs_server *server = NFS_SERVER(dir);
2088 struct nfs_fh fhandle;
56ae19f3 2089 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2090 struct nfs4_create_arg arg = {
2091 .dir_fh = NFS_FH(dir),
2092 .server = server,
2093 .name = &dentry->d_name,
2094 .attrs = sattr,
2095 .ftype = NF4DIR,
2096 .bitmask = server->attr_bitmask,
2097 };
2098 struct nfs4_create_res res = {
2099 .server = server,
2100 .fh = &fhandle,
2101 .fattr = &fattr,
56ae19f3 2102 .dir_fattr = &dir_fattr,
1da177e4
LT		 2103 };
2104 struct rpc_message msg = {
2105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2106 .rpc_argp = &arg,
2107 .rpc_resp = &res,
2108 };
2109 int status;
2110
0e574af1 2111 nfs_fattr_init(&fattr);
56ae19f3 2112 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2113
2114 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2115 if (!status) {
2116 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2117 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2118 status = nfs_instantiate(dentry, &fhandle, &fattr);
2119 }
2120 return status;
2121}
2122
2123static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2124 struct iattr *sattr)
2125{
2126 struct nfs4_exception exception = { };
2127 int err;
2128 do {
2129 err = nfs4_handle_exception(NFS_SERVER(dir),
2130 _nfs4_proc_mkdir(dir, dentry, sattr),
2131 &exception);
2132 } while (exception.retry);
2133 return err;
2134}
2135
2136static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2137 u64 cookie, struct page *page, unsigned int count, int plus)
2138{
2139 struct inode *dir = dentry->d_inode;
2140 struct nfs4_readdir_arg args = {
2141 .fh = NFS_FH(dir),
2142 .pages = &page,
2143 .pgbase = 0,
2144 .count = count,
2145 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2146 };
2147 struct nfs4_readdir_res res;
2148 struct rpc_message msg = {
2149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2150 .rpc_argp = &args,
2151 .rpc_resp = &res,
2152 .rpc_cred = cred,
2153 };
2154 int status;
2155
eadf4598
TM		 2156 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2157 dentry->d_parent->d_name.name,
2158 dentry->d_name.name,
2159 (unsigned long long)cookie);
1da177e4
LT		 2160 lock_kernel();
2161 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2162 res.pgbase = args.pgbase;
2163 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2164 if (status == 0)
2165 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2166 unlock_kernel();
eadf4598 2167 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2168 return status;
2169}
2170
2171static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2172 u64 cookie, struct page *page, unsigned int count, int plus)
2173{
2174 struct nfs4_exception exception = { };
2175 int err;
2176 do {
2177 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2178 _nfs4_proc_readdir(dentry, cred, cookie,
2179 page, count, plus),
2180 &exception);
2181 } while (exception.retry);
2182 return err;
2183}
2184
2185static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2186 struct iattr *sattr, dev_t rdev)
2187{
2188 struct nfs_server *server = NFS_SERVER(dir);
2189 struct nfs_fh fh;
56ae19f3 2190 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2191 struct nfs4_create_arg arg = {
2192 .dir_fh = NFS_FH(dir),
2193 .server = server,
2194 .name = &dentry->d_name,
2195 .attrs = sattr,
2196 .bitmask = server->attr_bitmask,
2197 };
2198 struct nfs4_create_res res = {
2199 .server = server,
2200 .fh = &fh,
2201 .fattr = &fattr,
56ae19f3 2202 .dir_fattr = &dir_fattr,
1da177e4
LT		 2203 };
2204 struct rpc_message msg = {
2205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2206 .rpc_argp = &arg,
2207 .rpc_resp = &res,
2208 };
2209 int status;
2210 int mode = sattr->ia_mode;
2211
0e574af1 2212 nfs_fattr_init(&fattr);
56ae19f3 2213 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2214
2215 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2216 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2217 if (S_ISFIFO(mode))
2218 arg.ftype = NF4FIFO;
2219 else if (S_ISBLK(mode)) {
2220 arg.ftype = NF4BLK;
2221 arg.u.device.specdata1 = MAJOR(rdev);
2222 arg.u.device.specdata2 = MINOR(rdev);
2223 }
2224 else if (S_ISCHR(mode)) {
2225 arg.ftype = NF4CHR;
2226 arg.u.device.specdata1 = MAJOR(rdev);
2227 arg.u.device.specdata2 = MINOR(rdev);
2228 }
2229 else
2230 arg.ftype = NF4SOCK;
2231
2232 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2233 if (status == 0) {
2234 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2235 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2236 status = nfs_instantiate(dentry, &fh, &fattr);
2237 }
2238 return status;
2239}
2240
2241static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2242 struct iattr *sattr, dev_t rdev)
2243{
2244 struct nfs4_exception exception = { };
2245 int err;
2246 do {
2247 err = nfs4_handle_exception(NFS_SERVER(dir),
2248 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2249 &exception);
2250 } while (exception.retry);
2251 return err;
2252}
2253
2254static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2255 struct nfs_fsstat *fsstat)
2256{
2257 struct nfs4_statfs_arg args = {
2258 .fh = fhandle,
2259 .bitmask = server->attr_bitmask,
2260 };
2261 struct rpc_message msg = {
2262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2263 .rpc_argp = &args,
2264 .rpc_resp = fsstat,
2265 };
2266
0e574af1 2267 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2268 return rpc_call_sync(server->client, &msg, 0);
2269}
2270
2271static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2272{
2273 struct nfs4_exception exception = { };
2274 int err;
2275 do {
2276 err = nfs4_handle_exception(server,
2277 _nfs4_proc_statfs(server, fhandle, fsstat),
2278 &exception);
2279 } while (exception.retry);
2280 return err;
2281}
2282
2283static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2284 struct nfs_fsinfo *fsinfo)
2285{
2286 struct nfs4_fsinfo_arg args = {
2287 .fh = fhandle,
2288 .bitmask = server->attr_bitmask,
2289 };
2290 struct rpc_message msg = {
2291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2292 .rpc_argp = &args,
2293 .rpc_resp = fsinfo,
2294 };
2295
2296 return rpc_call_sync(server->client, &msg, 0);
2297}
2298
2299static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2300{
2301 struct nfs4_exception exception = { };
2302 int err;
2303
2304 do {
2305 err = nfs4_handle_exception(server,
2306 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2307 &exception);
2308 } while (exception.retry);
2309 return err;
2310}
2311
2312static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2313{
0e574af1 2314 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2315 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2316}
2317
2318static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2319 struct nfs_pathconf *pathconf)
2320{
2321 struct nfs4_pathconf_arg args = {
2322 .fh = fhandle,
2323 .bitmask = server->attr_bitmask,
2324 };
2325 struct rpc_message msg = {
2326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2327 .rpc_argp = &args,
2328 .rpc_resp = pathconf,
2329 };
2330
2331 /* None of the pathconf attributes are mandatory to implement */
2332 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2333 memset(pathconf, 0, sizeof(*pathconf));
2334 return 0;
2335 }
2336
0e574af1 2337 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2338 return rpc_call_sync(server->client, &msg, 0);
2339}
2340
2341static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2342 struct nfs_pathconf *pathconf)
2343{
2344 struct nfs4_exception exception = { };
2345 int err;
2346
2347 do {
2348 err = nfs4_handle_exception(server,
2349 _nfs4_proc_pathconf(server, fhandle, pathconf),
2350 &exception);
2351 } while (exception.retry);
2352 return err;
2353}
2354
ec06c096 2355static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2356{
ec06c096 2357 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2358
ec06c096 2359 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2360 rpc_restart_call(task);
ec06c096 2361 return -EAGAIN;
1da177e4
LT		 2362 }
2363 if (task->tk_status > 0)
ec06c096
TM		 2364 renew_lease(server, data->timestamp);
2365 return 0;
1da177e4
LT		 2366}
2367
ec06c096 2368static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2369{
1da177e4
LT		 2370 struct rpc_message msg = {
2371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2372 .rpc_argp = &data->args,
2373 .rpc_resp = &data->res,
2374 .rpc_cred = data->cred,
2375 };
1da177e4
LT		 2376
2377 data->timestamp = jiffies;
2378
ec06c096 2379 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2380}
2381
788e7a89 2382static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2383{
1da177e4
LT		 2384 struct inode *inode = data->inode;
2385
2386 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2387 rpc_restart_call(task);
788e7a89 2388 return -EAGAIN;
1da177e4 2389 }
4f9838c7 2390 if (task->tk_status >= 0) {
1da177e4 2391 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2392 nfs_post_op_update_inode(inode, data->res.fattr);
2393 }
788e7a89 2394 return 0;
1da177e4
LT		 2395}
2396
788e7a89 2397static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2398{
1da177e4
LT		 2399 struct rpc_message msg = {
2400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2401 .rpc_argp = &data->args,
2402 .rpc_resp = &data->res,
2403 .rpc_cred = data->cred,
2404 };
2405 struct inode *inode = data->inode;
4f9838c7 2406 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2407 int stable;
1da177e4
LT		 2408
2409 if (how & FLUSH_STABLE) {
2410 if (!NFS_I(inode)->ncommit)
2411 stable = NFS_FILE_SYNC;
2412 else
2413 stable = NFS_DATA_SYNC;
2414 } else
2415 stable = NFS_UNSTABLE;
2416 data->args.stable = stable;
4f9838c7
TM		 2417 data->args.bitmask = server->attr_bitmask;
2418 data->res.server = server;
1da177e4
LT		 2419
2420 data->timestamp = jiffies;
2421
1da177e4 2422 /* Finalize the task. */
788e7a89 2423 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2424}
2425
788e7a89 2426static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2427{
1da177e4
LT		 2428 struct inode *inode = data->inode;
2429
2430 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2431 rpc_restart_call(task);
788e7a89 2432 return -EAGAIN;
1da177e4 2433 }
4f9838c7
TM		 2434 if (task->tk_status >= 0)
2435 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2436 return 0;
1da177e4
LT		 2437}
2438
788e7a89 2439static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2440{
1da177e4
LT		 2441 struct rpc_message msg = {
2442 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2443 .rpc_argp = &data->args,
2444 .rpc_resp = &data->res,
2445 .rpc_cred = data->cred,
2446 };
788e7a89 2447 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2448
4f9838c7
TM		 2449 data->args.bitmask = server->attr_bitmask;
2450 data->res.server = server;
2451
788e7a89 2452 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2453}
2454
2455/*
2456 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2457 * standalone procedure for queueing an asynchronous RENEW.
2458 */
963d8fe5 2459static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4
LT		 2460{
2461 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
963d8fe5 2462 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2463
2464 if (task->tk_status < 0) {
2465 switch (task->tk_status) {
2466 case -NFS4ERR_STALE_CLIENTID:
2467 case -NFS4ERR_EXPIRED:
2468 case -NFS4ERR_CB_PATH_DOWN:
2469 nfs4_schedule_state_recovery(clp);
2470 }
2471 return;
2472 }
2473 spin_lock(&clp->cl_lock);
2474 if (time_before(clp->cl_last_renewal,timestamp))
2475 clp->cl_last_renewal = timestamp;
2476 spin_unlock(&clp->cl_lock);
2477}
2478
963d8fe5
TM		 2479static const struct rpc_call_ops nfs4_renew_ops = {
2480 .rpc_call_done = nfs4_renew_done,
2481};
2482
b4454fe1 2483int nfs4_proc_async_renew(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2484{
2485 struct rpc_message msg = {
2486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2487 .rpc_argp = clp,
b4454fe1 2488 .rpc_cred = cred,
1da177e4
LT		 2489 };
2490
2491 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2492 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2493}
2494
b4454fe1 2495int nfs4_proc_renew(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2496{
2497 struct rpc_message msg = {
2498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2499 .rpc_argp = clp,
b4454fe1 2500 .rpc_cred = cred,
1da177e4
LT		 2501 };
2502 unsigned long now = jiffies;
2503 int status;
2504
2505 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2506 if (status < 0)
2507 return status;
2508 spin_lock(&clp->cl_lock);
2509 if (time_before(clp->cl_last_renewal,now))
2510 clp->cl_last_renewal = now;
2511 spin_unlock(&clp->cl_lock);
2512 return 0;
2513}
2514
aa1870af
BF		 2515static inline int nfs4_server_supports_acls(struct nfs_server *server)
2516{
2517 return (server->caps & NFS_CAP_ACLS)
2518 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2519 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2520}
2521
2522/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2523 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2524 * the stack.
2525 */
2526#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2527
2528static void buf_to_pages(const void *buf, size_t buflen,
2529 struct page **pages, unsigned int *pgbase)
2530{
2531 const void *p = buf;
2532
2533 *pgbase = offset_in_page(buf);
2534 p -= *pgbase;
2535 while (p < buf + buflen) {
2536 *(pages++) = virt_to_page(p);
2537 p += PAGE_CACHE_SIZE;
2538 }
2539}
2540
e50a1c2e
BF		 2541struct nfs4_cached_acl {
2542 int cached;
2543 size_t len;
3e9d4154 2544 char data[0];
e50a1c2e
BF		 2545};
2546
2547static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2548{
2549 struct nfs_inode *nfsi = NFS_I(inode);
2550
2551 spin_lock(&inode->i_lock);
2552 kfree(nfsi->nfs4_acl);
2553 nfsi->nfs4_acl = acl;
2554 spin_unlock(&inode->i_lock);
2555}
2556
2557static void nfs4_zap_acl_attr(struct inode *inode)
2558{
2559 nfs4_set_cached_acl(inode, NULL);
2560}
2561
2562static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2563{
2564 struct nfs_inode *nfsi = NFS_I(inode);
2565 struct nfs4_cached_acl *acl;
2566 int ret = -ENOENT;
2567
2568 spin_lock(&inode->i_lock);
2569 acl = nfsi->nfs4_acl;
2570 if (acl == NULL)
2571 goto out;
2572 if (buf == NULL) /* user is just asking for length */
2573 goto out_len;
2574 if (acl->cached == 0)
2575 goto out;
2576 ret = -ERANGE; /* see getxattr(2) man page */
2577 if (acl->len > buflen)
2578 goto out;
2579 memcpy(buf, acl->data, acl->len);
2580out_len:
2581 ret = acl->len;
2582out:
2583 spin_unlock(&inode->i_lock);
2584 return ret;
2585}
2586
2587static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2588{
2589 struct nfs4_cached_acl *acl;
2590
2591 if (buf && acl_len <= PAGE_SIZE) {
2592 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2593 if (acl == NULL)
2594 goto out;
2595 acl->cached = 1;
2596 memcpy(acl->data, buf, acl_len);
2597 } else {
2598 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2599 if (acl == NULL)
2600 goto out;
2601 acl->cached = 0;
2602 }
2603 acl->len = acl_len;
2604out:
2605 nfs4_set_cached_acl(inode, acl);
2606}
2607
2608static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2609{
aa1870af
BF		 2610 struct page *pages[NFS4ACL_MAXPAGES];
2611 struct nfs_getaclargs args = {
2612 .fh = NFS_FH(inode),
2613 .acl_pages = pages,
2614 .acl_len = buflen,
2615 };
2616 size_t resp_len = buflen;
e50a1c2e 2617 void *resp_buf;
aa1870af
BF		 2618 struct rpc_message msg = {
2619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2620 .rpc_argp = &args,
2621 .rpc_resp = &resp_len,
2622 };
e50a1c2e 2623 struct page *localpage = NULL;
aa1870af
BF		 2624 int ret;
2625
e50a1c2e
BF		 2626 if (buflen < PAGE_SIZE) {
2627 /* As long as we're doing a round trip to the server anyway,
2628 * let's be prepared for a page of acl data. */
2629 localpage = alloc_page(GFP_KERNEL);
2630 resp_buf = page_address(localpage);
2631 if (localpage == NULL)
2632 return -ENOMEM;
2633 args.acl_pages[0] = localpage;
2634 args.acl_pgbase = 0;
1d95db8e 2635 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2636 } else {
2637 resp_buf = buf;
2638 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2639 }
aa1870af 2640 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2641 if (ret)
2642 goto out_free;
2643 if (resp_len > args.acl_len)
2644 nfs4_write_cached_acl(inode, NULL, resp_len);
2645 else
2646 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2647 if (buf) {
2648 ret = -ERANGE;
2649 if (resp_len > buflen)
2650 goto out_free;
2651 if (localpage)
2652 memcpy(buf, resp_buf, resp_len);
2653 }
2654 ret = resp_len;
2655out_free:
2656 if (localpage)
2657 __free_page(localpage);
aa1870af
BF		 2658 return ret;
2659}
2660
e50a1c2e
BF		 2661static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2662{
2663 struct nfs_server *server = NFS_SERVER(inode);
2664 int ret;
2665
2666 if (!nfs4_server_supports_acls(server))
2667 return -EOPNOTSUPP;
2668 ret = nfs_revalidate_inode(server, inode);
2669 if (ret < 0)
2670 return ret;
2671 ret = nfs4_read_cached_acl(inode, buf, buflen);
2672 if (ret != -ENOENT)
2673 return ret;
2674 return nfs4_get_acl_uncached(inode, buf, buflen);
2675}
2676
4b580ee3
BF		 2677static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2678{
2679 struct nfs_server *server = NFS_SERVER(inode);
2680 struct page *pages[NFS4ACL_MAXPAGES];
2681 struct nfs_setaclargs arg = {
2682 .fh = NFS_FH(inode),
2683 .acl_pages = pages,
2684 .acl_len = buflen,
2685 };
2686 struct rpc_message msg = {
2687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2688 .rpc_argp = &arg,
2689 .rpc_resp = NULL,
2690 };
2691 int ret;
2692
2693 if (!nfs4_server_supports_acls(server))
2694 return -EOPNOTSUPP;
642ac549 2695 nfs_inode_return_delegation(inode);
4b580ee3
BF		 2696 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2697 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
e50a1c2e
BF		 2698 if (ret == 0)
2699 nfs4_write_cached_acl(inode, buf, buflen);
4b580ee3
BF		 2700 return ret;
2701}
2702
1da177e4 2703static int
faf5f49c 2704nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4
LT		 2705{
2706 struct nfs4_client *clp = server->nfs4_state;
2707
2708 if (!clp || task->tk_status >= 0)
2709 return 0;
2710 switch(task->tk_status) {
2711 case -NFS4ERR_STALE_CLIENTID:
2712 case -NFS4ERR_STALE_STATEID:
2713 case -NFS4ERR_EXPIRED:
2714 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2715 nfs4_schedule_state_recovery(clp);
433fbe4c 2716 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2717 rpc_wake_up_task(task);
2718 task->tk_status = 0;
2719 return -EAGAIN;
1da177e4 2720 case -NFS4ERR_DELAY:
006ea73e
CL		 2721 nfs_inc_server_stats((struct nfs_server *) server,
2722 NFSIOS_DELAY);
2723 case -NFS4ERR_GRACE:
1da177e4
LT		 2724 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2725 task->tk_status = 0;
2726 return -EAGAIN;
2727 case -NFS4ERR_OLD_STATEID:
2728 task->tk_status = 0;
2729 return -EAGAIN;
2730 }
2731 task->tk_status = nfs4_map_errors(task->tk_status);
2732 return 0;
2733}
2734
433fbe4c
TM		 2735static int nfs4_wait_bit_interruptible(void *word)
2736{
2737 if (signal_pending(current))
2738 return -ERESTARTSYS;
2739 schedule();
2740 return 0;
2741}
2742
1da177e4
LT		 2743static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2744{
1da177e4 2745 sigset_t oldset;
433fbe4c 2746 int res;
1da177e4
LT		 2747
2748 might_sleep();
2749
2750 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2751 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2752 nfs4_wait_bit_interruptible,
2753 TASK_INTERRUPTIBLE);
1da177e4
LT		 2754 rpc_clnt_sigunmask(clnt, &oldset);
2755 return res;
2756}
2757
2758static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2759{
2760 sigset_t oldset;
2761 int res = 0;
2762
2763 might_sleep();
2764
2765 if (*timeout <= 0)
2766 *timeout = NFS4_POLL_RETRY_MIN;
2767 if (*timeout > NFS4_POLL_RETRY_MAX)
2768 *timeout = NFS4_POLL_RETRY_MAX;
2769 rpc_clnt_sigmask(clnt, &oldset);
2770 if (clnt->cl_intr) {
041e0e3b 2771 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2772 if (signalled())
2773 res = -ERESTARTSYS;
041e0e3b
NA		 2774 } else
2775 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2776 rpc_clnt_sigunmask(clnt, &oldset);
2777 *timeout <<= 1;
2778 return res;
2779}
2780
2781/* This is the error handling routine for processes that are allowed
2782 * to sleep.
2783 */
faf5f49c 2784int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4
LT		 2785{
2786 struct nfs4_client *clp = server->nfs4_state;
2787 int ret = errorcode;
2788
2789 exception->retry = 0;
2790 switch(errorcode) {
2791 case 0:
2792 return 0;
2793 case -NFS4ERR_STALE_CLIENTID:
2794 case -NFS4ERR_STALE_STATEID:
2795 case -NFS4ERR_EXPIRED:
433fbe4c 2796 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2797 ret = nfs4_wait_clnt_recover(server->client, clp);
2798 if (ret == 0)
2799 exception->retry = 1;
2800 break;
2801 case -NFS4ERR_GRACE:
2802 case -NFS4ERR_DELAY:
2803 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2804 if (ret != 0)
2805 break;
1da177e4 2806 case -NFS4ERR_OLD_STATEID:
2c56617d 2807 exception->retry = 1;
1da177e4
LT		 2808 }
2809 /* We failed to handle the error */
2810 return nfs4_map_errors(ret);
2811}
2812
286d7d6a 2813int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2814{
2815 nfs4_verifier sc_verifier;
2816 struct nfs4_setclientid setclientid = {
2817 .sc_verifier = &sc_verifier,
2818 .sc_prog = program,
2819 };
2820 struct rpc_message msg = {
2821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2822 .rpc_argp = &setclientid,
2823 .rpc_resp = clp,
286d7d6a 2824 .rpc_cred = cred,
1da177e4
LT		 2825 };
2826 u32 *p;
2827 int loop = 0;
2828 int status;
2829
2830 p = (u32*)sc_verifier.data;
2831 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2832 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2833
2834 for(;;) {
2835 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2836 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2837 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
286d7d6a 2838 cred->cr_ops->cr_name,
1da177e4
LT		 2839 clp->cl_id_uniquifier);
2840 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2841 sizeof(setclientid.sc_netid), "tcp");
2842 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2843 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2844 clp->cl_ipaddr, port >> 8, port & 255);
2845
2846 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2847 if (status != -NFS4ERR_CLID_INUSE)
2848 break;
2849 if (signalled())
2850 break;
2851 if (loop++ & 1)
2852 ssleep(clp->cl_lease_time + 1);
2853 else
2854 if (++clp->cl_id_uniquifier == 0)
2855 break;
2856 }
2857 return status;
2858}
2859
51581f3b 2860static int _nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2861{
2862 struct nfs_fsinfo fsinfo;
2863 struct rpc_message msg = {
2864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2865 .rpc_argp = clp,
2866 .rpc_resp = &fsinfo,
286d7d6a 2867 .rpc_cred = cred,
1da177e4
LT		 2868 };
2869 unsigned long now;
2870 int status;
2871
2872 now = jiffies;
2873 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2874 if (status == 0) {
2875 spin_lock(&clp->cl_lock);
2876 clp->cl_lease_time = fsinfo.lease_time * HZ;
2877 clp->cl_last_renewal = now;
58d9714a 2878 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2879 spin_unlock(&clp->cl_lock);
2880 }
2881 return status;
2882}
2883
51581f3b
TM		 2884int nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
2885{
2886 long timeout;
2887 int err;
2888 do {
2889 err = _nfs4_proc_setclientid_confirm(clp, cred);
2890 switch (err) {
2891 case 0:
2892 return err;
2893 case -NFS4ERR_RESOURCE:
2894 /* The IBM lawyers misread another document! */
2895 case -NFS4ERR_DELAY:
2896 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2897 }
2898 } while (err == 0);
2899 return err;
2900}
2901
fe650407
TM		 2902struct nfs4_delegreturndata {
2903 struct nfs4_delegreturnargs args;
fa178f29 2904 struct nfs4_delegreturnres res;
fe650407
TM		 2905 struct nfs_fh fh;
2906 nfs4_stateid stateid;
2907 struct rpc_cred *cred;
26e976a8 2908 unsigned long timestamp;
fa178f29 2909 struct nfs_fattr fattr;
fe650407
TM		 2910 int rpc_status;
2911};
2912
2913static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2914{
fe650407 2915 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 2916 struct rpc_message msg = {
2917 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 2918 .rpc_argp = &data->args,
fa178f29 2919 .rpc_resp = &data->res,
fe650407 2920 .rpc_cred = data->cred,
1da177e4 2921 };
fa178f29 2922 nfs_fattr_init(data->res.fattr);
fe650407
TM		 2923 rpc_call_setup(task, &msg, 0);
2924}
1da177e4 2925
fe650407
TM		 2926static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2927{
2928 struct nfs4_delegreturndata *data = calldata;
2929 data->rpc_status = task->tk_status;
26e976a8 2930 if (data->rpc_status == 0)
fa178f29 2931 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2932}
2933
2934static void nfs4_delegreturn_release(void *calldata)
2935{
2936 struct nfs4_delegreturndata *data = calldata;
2937
2938 put_rpccred(data->cred);
2939 kfree(calldata);
2940}
2941
c8d149f3 2942static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2943 .rpc_call_prepare = nfs4_delegreturn_prepare,
2944 .rpc_call_done = nfs4_delegreturn_done,
2945 .rpc_release = nfs4_delegreturn_release,
2946};
2947
2948static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2949{
2950 struct nfs4_delegreturndata *data;
fa178f29 2951 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 2952 struct rpc_task *task;
2953 int status;
2954
2955 data = kmalloc(sizeof(*data), GFP_KERNEL);
2956 if (data == NULL)
2957 return -ENOMEM;
2958 data->args.fhandle = &data->fh;
2959 data->args.stateid = &data->stateid;
fa178f29 2960 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 2961 nfs_copy_fh(&data->fh, NFS_FH(inode));
2962 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 2963 data->res.fattr = &data->fattr;
2964 data->res.server = server;
fe650407 2965 data->cred = get_rpccred(cred);
26e976a8 2966 data->timestamp = jiffies;
fe650407
TM		 2967 data->rpc_status = 0;
2968
2969 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 2970 if (IS_ERR(task))
fe650407 2971 return PTR_ERR(task);
fe650407 2972 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 2973 if (status == 0) {
fe650407 2974 status = data->rpc_status;
fa178f29
TM		 2975 if (status == 0)
2976 nfs_post_op_update_inode(inode, &data->fattr);
2977 }
fe650407
TM		 2978 rpc_release_task(task);
2979 return status;
1da177e4
LT		 2980}
2981
2982int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2983{
2984 struct nfs_server *server = NFS_SERVER(inode);
2985 struct nfs4_exception exception = { };
2986 int err;
2987 do {
2988 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2989 switch (err) {
2990 case -NFS4ERR_STALE_STATEID:
2991 case -NFS4ERR_EXPIRED:
2992 nfs4_schedule_state_recovery(server->nfs4_state);
2993 case 0:
2994 return 0;
2995 }
2996 err = nfs4_handle_exception(server, err, &exception);
2997 } while (exception.retry);
2998 return err;
2999}
3000
3001#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3002#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3003
3004/*
3005 * sleep, with exponential backoff, and retry the LOCK operation.
3006 */
3007static unsigned long
3008nfs4_set_lock_task_retry(unsigned long timeout)
3009{
041e0e3b 3010 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3011 timeout <<= 1;
3012 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3013 return NFS4_LOCK_MAXTIMEOUT;
3014 return timeout;
3015}
3016
1da177e4
LT		 3017static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3018{
3019 struct inode *inode = state->inode;
3020 struct nfs_server *server = NFS_SERVER(inode);
3021 struct nfs4_client *clp = server->nfs4_state;
911d1aaf 3022 struct nfs_lockt_args arg = {
1da177e4 3023 .fh = NFS_FH(inode),
911d1aaf 3024 .fl = request,
1da177e4 3025 };
911d1aaf
TM		 3026 struct nfs_lockt_res res = {
3027 .denied = request,
1da177e4
LT		 3028 };
3029 struct rpc_message msg = {
3030 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3031 .rpc_argp = &arg,
3032 .rpc_resp = &res,
3033 .rpc_cred = state->owner->so_cred,
3034 };
1da177e4
LT		 3035 struct nfs4_lock_state *lsp;
3036 int status;
3037
3038 down_read(&clp->cl_sem);
911d1aaf 3039 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3040 status = nfs4_set_lock_state(state, request);
3041 if (status != 0)
3042 goto out;
3043 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3044 arg.lock_owner.id = lsp->ls_id;
1da177e4 3045 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3046 switch (status) {
3047 case 0:
3048 request->fl_type = F_UNLCK;
3049 break;
3050 case -NFS4ERR_DENIED:
3051 status = 0;
1da177e4 3052 }
8d0a8a9d 3053out:
1da177e4
LT		 3054 up_read(&clp->cl_sem);
3055 return status;
3056}
3057
3058static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3059{
3060 struct nfs4_exception exception = { };
3061 int err;
3062
3063 do {
3064 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3065 _nfs4_proc_getlk(state, cmd, request),
3066 &exception);
3067 } while (exception.retry);
3068 return err;
3069}
3070
3071static int do_vfs_lock(struct file *file, struct file_lock *fl)
3072{
3073 int res = 0;
3074 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3075 case FL_POSIX:
3076 res = posix_lock_file_wait(file, fl);
3077 break;
3078 case FL_FLOCK:
3079 res = flock_lock_file_wait(file, fl);
3080 break;
3081 default:
3082 BUG();
3083 }
3084 if (res < 0)
3085 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
3086 __FUNCTION__);
3087 return res;
3088}
3089
faf5f49c 3090struct nfs4_unlockdata {
911d1aaf
TM		 3091 struct nfs_locku_args arg;
3092 struct nfs_locku_res res;
faf5f49c
TM		 3093 struct nfs4_lock_state *lsp;
3094 struct nfs_open_context *ctx;
911d1aaf
TM		 3095 struct file_lock fl;
3096 const struct nfs_server *server;
26e976a8 3097 unsigned long timestamp;
faf5f49c
TM		 3098};
3099
911d1aaf
TM		 3100static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3101 struct nfs_open_context *ctx,
3102 struct nfs4_lock_state *lsp,
3103 struct nfs_seqid *seqid)
3104{
3105 struct nfs4_unlockdata *p;
3106 struct inode *inode = lsp->ls_state->inode;
3107
3108 p = kmalloc(sizeof(*p), GFP_KERNEL);
3109 if (p == NULL)
3110 return NULL;
3111 p->arg.fh = NFS_FH(inode);
3112 p->arg.fl = &p->fl;
3113 p->arg.seqid = seqid;
3114 p->arg.stateid = &lsp->ls_stateid;
3115 p->lsp = lsp;
3116 atomic_inc(&lsp->ls_count);
3117 /* Ensure we don't close file until we're done freeing locks! */
3118 p->ctx = get_nfs_open_context(ctx);
3119 memcpy(&p->fl, fl, sizeof(p->fl));
3120 p->server = NFS_SERVER(inode);
3121 return p;
3122}
3123
06f814a3 3124static void nfs4_locku_release_calldata(void *data)
faf5f49c 3125{
963d8fe5 3126 struct nfs4_unlockdata *calldata = data;
911d1aaf 3127 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3128 nfs4_put_lock_state(calldata->lsp);
3129 put_nfs_open_context(calldata->ctx);
3130 kfree(calldata);
faf5f49c
TM		 3131}
3132
963d8fe5 3133static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3134{
963d8fe5 3135 struct nfs4_unlockdata *calldata = data;
faf5f49c 3136
06f814a3
TM		 3137 if (RPC_ASSASSINATED(task))
3138 return;
911d1aaf 3139 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3140 switch (task->tk_status) {
3141 case 0:
3142 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3143 calldata->res.stateid.data,
faf5f49c 3144 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3145 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3146 break;
3147 case -NFS4ERR_STALE_STATEID:
3148 case -NFS4ERR_EXPIRED:
911d1aaf 3149 nfs4_schedule_state_recovery(calldata->server->nfs4_state);
faf5f49c
TM		 3150 break;
3151 default:
911d1aaf 3152 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
faf5f49c 3153 rpc_restart_call(task);
faf5f49c
TM		 3154 }
3155 }
faf5f49c
TM		 3156}
3157
4ce70ada 3158static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3159{
4ce70ada 3160 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3161 struct rpc_message msg = {
3162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3163 .rpc_argp = &calldata->arg,
3164 .rpc_resp = &calldata->res,
3165 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3166 };
faf5f49c 3167
911d1aaf 3168 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3169 return;
3170 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3171 /* Note: exit _without_ running nfs4_locku_done */
3172 task->tk_action = NULL;
faf5f49c
TM		 3173 return;
3174 }
26e976a8 3175 calldata->timestamp = jiffies;
faf5f49c
TM		 3176 rpc_call_setup(task, &msg, 0);
3177}
3178
963d8fe5 3179static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3180 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3181 .rpc_call_done = nfs4_locku_done,
06f814a3 3182 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3183};
3184
a5d16a4d
TM		 3185static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3186 struct nfs_open_context *ctx,
3187 struct nfs4_lock_state *lsp,
3188 struct nfs_seqid *seqid)
3189{
3190 struct nfs4_unlockdata *data;
a5d16a4d
TM		 3191
3192 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3193 if (data == NULL) {
3194 nfs_free_seqid(seqid);
3195 return ERR_PTR(-ENOMEM);
3196 }
3197
3198 /* Unlock _before_ we do the RPC call */
3199 do_vfs_lock(fl->fl_file, fl);
7a1218a2 3200 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM		 3201}
3202
faf5f49c
TM		 3203static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3204{
911d1aaf 3205 struct nfs_seqid *seqid;
1da177e4 3206 struct nfs4_lock_state *lsp;
06f814a3
TM		 3207 struct rpc_task *task;
3208 int status = 0;
faf5f49c 3209
6bfc93ef
TM		 3210 /* Is this a delegated lock? */
3211 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
911d1aaf
TM		 3212 goto out_unlock;
3213 /* Is this open_owner holding any locks on the server? */
3214 if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
3215 goto out_unlock;
6bfc93ef 3216
8d0a8a9d
TM		 3217 status = nfs4_set_lock_state(state, request);
3218 if (status != 0)
911d1aaf 3219 goto out_unlock;
8d0a8a9d 3220 lsp = request->fl_u.nfs4_fl.owner;
06f814a3 3221 status = -ENOMEM;
911d1aaf
TM		 3222 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3223 if (seqid == NULL)
3224 goto out_unlock;
a5d16a4d
TM		 3225 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3226 status = PTR_ERR(task);
3227 if (IS_ERR(task))
3228 goto out_unlock;
3229 status = nfs4_wait_for_completion_rpc_task(task);
3230 rpc_release_task(task);
911d1aaf 3231 return status;
911d1aaf 3232out_unlock:
faf5f49c 3233 do_vfs_lock(request->fl_file, request);
1da177e4
LT		 3234 return status;
3235}
3236
a5d16a4d
TM		 3237struct nfs4_lockdata {
3238 struct nfs_lock_args arg;
3239 struct nfs_lock_res res;
3240 struct nfs4_lock_state *lsp;
3241 struct nfs_open_context *ctx;
3242 struct file_lock fl;
26e976a8 3243 unsigned long timestamp;
a5d16a4d
TM		 3244 int rpc_status;
3245 int cancelled;
3246};
3247
3248static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3249 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3250{
a5d16a4d
TM		 3251 struct nfs4_lockdata *p;
3252 struct inode *inode = lsp->ls_state->inode;
1da177e4 3253 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3254
3255 p = kzalloc(sizeof(*p), GFP_KERNEL);
3256 if (p == NULL)
3257 return NULL;
3258
3259 p->arg.fh = NFS_FH(inode);
3260 p->arg.fl = &p->fl;
3261 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3262 if (p->arg.lock_seqid == NULL)
3263 goto out_free;
3264 p->arg.lock_stateid = &lsp->ls_stateid;
3265 p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
3266 p->arg.lock_owner.id = lsp->ls_id;
3267 p->lsp = lsp;
3268 atomic_inc(&lsp->ls_count);
3269 p->ctx = get_nfs_open_context(ctx);
3270 memcpy(&p->fl, fl, sizeof(p->fl));
3271 return p;
3272out_free:
3273 kfree(p);
3274 return NULL;
3275}
3276
3277static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3278{
3279 struct nfs4_lockdata *data = calldata;
3280 struct nfs4_state *state = data->lsp->ls_state;
3281 struct nfs4_state_owner *sp = state->owner;
1da177e4 3282 struct rpc_message msg = {
a5d16a4d
TM		 3283 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3284 .rpc_argp = &data->arg,
3285 .rpc_resp = &data->res,
3286 .rpc_cred = sp->so_cred,
1da177e4 3287 };
06735b34 3288
a5d16a4d
TM		 3289 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3290 return;
3291 dprintk("%s: begin!\n", __FUNCTION__);
3292 /* Do we need to do an open_to_lock_owner? */
3293 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3294 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3295 if (data->arg.open_seqid == NULL) {
3296 data->rpc_status = -ENOMEM;
3297 task->tk_action = NULL;
06735b34 3298 goto out;
8d0a8a9d 3299 }
a5d16a4d
TM		 3300 data->arg.open_stateid = &state->stateid;
3301 data->arg.new_lock_owner = 1;
3302 }
26e976a8 3303 data->timestamp = jiffies;
a5d16a4d 3304 rpc_call_setup(task, &msg, 0);
06735b34 3305out:
a5d16a4d
TM		 3306 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3307}
3308
3309static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3310{
3311 struct nfs4_lockdata *data = calldata;
3312
3313 dprintk("%s: begin!\n", __FUNCTION__);
3314
3315 data->rpc_status = task->tk_status;
3316 if (RPC_ASSASSINATED(task))
3317 goto out;
3318 if (data->arg.new_lock_owner != 0) {
3319 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3320 if (data->rpc_status == 0)
3321 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3322 else
3323 goto out;
3324 }
3325 if (data->rpc_status == 0) {
3326 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3327 sizeof(data->lsp->ls_stateid.data));
3328 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
26e976a8 3329 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3330 }
3331 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3332out:
3333 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3334}
3335
3336static void nfs4_lock_release(void *calldata)
3337{
3338 struct nfs4_lockdata *data = calldata;
3339
3340 dprintk("%s: begin!\n", __FUNCTION__);
3341 if (data->arg.open_seqid != NULL)
3342 nfs_free_seqid(data->arg.open_seqid);
3343 if (data->cancelled != 0) {
3344 struct rpc_task *task;
3345 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3346 data->arg.lock_seqid);
3347 if (!IS_ERR(task))
3348 rpc_release_task(task);
3349 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3350 } else
3351 nfs_free_seqid(data->arg.lock_seqid);
3352 nfs4_put_lock_state(data->lsp);
3353 put_nfs_open_context(data->ctx);
3354 kfree(data);
3355 dprintk("%s: done!\n", __FUNCTION__);
3356}
3357
3358static const struct rpc_call_ops nfs4_lock_ops = {
3359 .rpc_call_prepare = nfs4_lock_prepare,
3360 .rpc_call_done = nfs4_lock_done,
3361 .rpc_release = nfs4_lock_release,
3362};
3363
3364static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3365{
3366 struct nfs4_lockdata *data;
3367 struct rpc_task *task;
3368 int ret;
3369
3370 dprintk("%s: begin!\n", __FUNCTION__);
3371 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3372 fl->fl_u.nfs4_fl.owner);
3373 if (data == NULL)
3374 return -ENOMEM;
3375 if (IS_SETLKW(cmd))
3376 data->arg.block = 1;
3377 if (reclaim != 0)
3378 data->arg.reclaim = 1;
3379 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3380 &nfs4_lock_ops, data);
7a1218a2 3381 if (IS_ERR(task))
a5d16a4d 3382 return PTR_ERR(task);
a5d16a4d
TM		 3383 ret = nfs4_wait_for_completion_rpc_task(task);
3384 if (ret == 0) {
3385 ret = data->rpc_status;
3386 if (ret == -NFS4ERR_DENIED)
3387 ret = -EAGAIN;
3388 } else
3389 data->cancelled = 1;
3390 rpc_release_task(task);
3391 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3392 return ret;
1da177e4
LT		 3393}
3394
3395static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3396{
202b50dc
TM		 3397 struct nfs_server *server = NFS_SERVER(state->inode);
3398 struct nfs4_exception exception = { };
3399 int err;
3400
6bfc93ef
TM		 3401 /* Cache the lock if possible... */
3402 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3403 return 0;
202b50dc
TM		 3404 do {
3405 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3406 if (err != -NFS4ERR_DELAY)
3407 break;
3408 nfs4_handle_exception(server, err, &exception);
3409 } while (exception.retry);
3410 return err;
1da177e4
LT		 3411}
3412
3413static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3414{
202b50dc
TM		 3415 struct nfs_server *server = NFS_SERVER(state->inode);
3416 struct nfs4_exception exception = { };
3417 int err;
3418
6bfc93ef
TM		 3419 err = nfs4_set_lock_state(state, request);
3420 if (err != 0)
3421 return err;
202b50dc
TM		 3422 do {
3423 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3424 if (err != -NFS4ERR_DELAY)
3425 break;
3426 nfs4_handle_exception(server, err, &exception);
3427 } while (exception.retry);
3428 return err;
1da177e4
LT		 3429}
3430
3431static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3432{
3433 struct nfs4_client *clp = state->owner->so_client;
3434 int status;
3435
6bfc93ef 3436 /* Is this a delegated open? */
ff604066 3437 if (NFS_I(state->inode)->delegation_state != 0) {
6bfc93ef
TM		 3438 /* Yes: cache locks! */
3439 status = do_vfs_lock(request->fl_file, request);
3440 /* ...but avoid races with delegation recall... */
3441 if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
ff604066 3442 return status;
1da177e4 3443 }
ff604066 3444 down_read(&clp->cl_sem);
6bfc93ef
TM		 3445 status = nfs4_set_lock_state(state, request);
3446 if (status != 0)
3447 goto out;
3448 status = _nfs4_do_setlk(state, cmd, request, 0);
3449 if (status != 0)
3450 goto out;
3451 /* Note: we always want to sleep here! */
3452 request->fl_flags |= FL_SLEEP;
3453 if (do_vfs_lock(request->fl_file, request) < 0)
3454 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3455out:
1da177e4
LT		 3456 up_read(&clp->cl_sem);
3457 return status;
3458}
3459
3460static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3461{
3462 struct nfs4_exception exception = { };
3463 int err;
3464
3465 do {
3466 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3467 _nfs4_proc_setlk(state, cmd, request),
3468 &exception);
3469 } while (exception.retry);
3470 return err;
3471}
3472
3473static int
3474nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3475{
3476 struct nfs_open_context *ctx;
3477 struct nfs4_state *state;
3478 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3479 int status;
3480
3481 /* verify open state */
3482 ctx = (struct nfs_open_context *)filp->private_data;
3483 state = ctx->state;
3484
3485 if (request->fl_start < 0 || request->fl_end < 0)
3486 return -EINVAL;
3487
3488 if (IS_GETLK(cmd))
3489 return nfs4_proc_getlk(state, F_GETLK, request);
3490
3491 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3492 return -EINVAL;
3493
3494 if (request->fl_type == F_UNLCK)
3495 return nfs4_proc_unlck(state, cmd, request);
3496
3497 do {
3498 status = nfs4_proc_setlk(state, cmd, request);
3499 if ((status != -EAGAIN) || IS_SETLK(cmd))
3500 break;
3501 timeout = nfs4_set_lock_task_retry(timeout);
3502 status = -ERESTARTSYS;
3503 if (signalled())
3504 break;
3505 } while(status < 0);
1da177e4
LT		 3506 return status;
3507}
3508
888e694c
TM		 3509int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3510{
3511 struct nfs_server *server = NFS_SERVER(state->inode);
3512 struct nfs4_exception exception = { };
3513 int err;
3514
3515 err = nfs4_set_lock_state(state, fl);
3516 if (err != 0)
3517 goto out;
3518 do {
3519 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3520 if (err != -NFS4ERR_DELAY)
3521 break;
3522 err = nfs4_handle_exception(server, err, &exception);
3523 } while (exception.retry);
3524out:
3525 return err;
3526}
6b3b5496 3527
aa1870af
BF		 3528#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3529
6b3b5496
BF		 3530int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3531 size_t buflen, int flags)
3532{
4b580ee3
BF		 3533 struct inode *inode = dentry->d_inode;
3534
3535 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3536 return -EOPNOTSUPP;
3537
3538 if (!S_ISREG(inode->i_mode) &&
3539 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3540 return -EPERM;
3541
3542 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3543}
3544
3545/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3546 * and that's what we'll do for e.g. user attributes that haven't been set.
3547 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3548 * attributes in kernel-managed attribute namespaces. */
3549ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3550 size_t buflen)
3551{
aa1870af
BF		 3552 struct inode *inode = dentry->d_inode;
3553
3554 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3555 return -EOPNOTSUPP;
3556
3557 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3558}
3559
3560ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3561{
aa1870af 3562 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3563
096455a2
BF		 3564 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3565 return 0;
6b3b5496
BF		 3566 if (buf && buflen < len)
3567 return -ERANGE;
3568 if (buf)
aa1870af
BF		 3569 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3570 return len;
6b3b5496
BF		 3571}
3572
683b57b4 3573int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
7aaa0b3b 3574 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3575{
3576 struct nfs_server *server = NFS_SERVER(dir);
3577 u32 bitmask[2] = {
3578 [0] = server->attr_bitmask[0] | FATTR4_WORD0_FS_LOCATIONS,
3579 [1] = server->attr_bitmask[1],
3580 };
3581 struct nfs4_fs_locations_arg args = {
3582 .dir_fh = NFS_FH(dir),
3583 .name = &dentry->d_name,
3584 .page = page,
3585 .bitmask = bitmask,
3586 };
3587 struct rpc_message msg = {
3588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3589 .rpc_argp = &args,
7aaa0b3b 3590 .rpc_resp = fs_locations,
683b57b4
TM		 3591 };
3592 int status;
3593
3594 dprintk("%s: start\n", __FUNCTION__);
3595 fs_locations->fattr.valid = 0;
3596 fs_locations->server = server;
3597 status = rpc_call_sync(server->client, &msg, 0);
3598 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3599 return status;
3600}
3601
1da177e4
LT		 3602struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3603 .recover_open = nfs4_open_reclaim,
3604 .recover_lock = nfs4_lock_reclaim,
3605};
3606
3607struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3608 .recover_open = nfs4_open_expired,
3609 .recover_lock = nfs4_lock_expired,
3610};
3611
6b3b5496
BF		 3612static struct inode_operations nfs4_file_inode_operations = {
3613 .permission = nfs_permission,
3614 .getattr = nfs_getattr,
3615 .setattr = nfs_setattr,
3616 .getxattr = nfs4_getxattr,
3617 .setxattr = nfs4_setxattr,
3618 .listxattr = nfs4_listxattr,
3619};
3620
1da177e4
LT		 3621struct nfs_rpc_ops nfs_v4_clientops = {
3622 .version = 4, /* protocol version */
3623 .dentry_ops = &nfs4_dentry_operations,
3624 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3625 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3626 .getroot = nfs4_proc_get_root,
3627 .getattr = nfs4_proc_getattr,
3628 .setattr = nfs4_proc_setattr,
3629 .lookup = nfs4_proc_lookup,
3630 .access = nfs4_proc_access,
3631 .readlink = nfs4_proc_readlink,
3632 .read = nfs4_proc_read,
3633 .write = nfs4_proc_write,
3634 .commit = nfs4_proc_commit,
3635 .create = nfs4_proc_create,
3636 .remove = nfs4_proc_remove,
3637 .unlink_setup = nfs4_proc_unlink_setup,
3638 .unlink_done = nfs4_proc_unlink_done,
3639 .rename = nfs4_proc_rename,
3640 .link = nfs4_proc_link,
3641 .symlink = nfs4_proc_symlink,
3642 .mkdir = nfs4_proc_mkdir,
3643 .rmdir = nfs4_proc_remove,
3644 .readdir = nfs4_proc_readdir,
3645 .mknod = nfs4_proc_mknod,
3646 .statfs = nfs4_proc_statfs,
3647 .fsinfo = nfs4_proc_fsinfo,
3648 .pathconf = nfs4_proc_pathconf,
3649 .decode_dirent = nfs4_decode_dirent,
3650 .read_setup = nfs4_proc_read_setup,
ec06c096 3651 .read_done = nfs4_read_done,
1da177e4 3652 .write_setup = nfs4_proc_write_setup,
788e7a89 3653 .write_done = nfs4_write_done,
1da177e4 3654 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3655 .commit_done = nfs4_commit_done,
02a913a7
TM		 3656 .file_open = nfs_open,
3657 .file_release = nfs_release,
1da177e4 3658 .lock = nfs4_proc_lock,
e50a1c2e 3659 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3660};
3661
3662/*
3663 * Local variables:
3664 * c-basic-offset: 8
3665 * End:
3666 */
Linux 6.x block layer and io_uring tree(s)