]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - fs/nfs/nfs4proc.c
NFSv4: Support recalling delegations by stateid
[mirror_ubuntu-artful-kernel.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT
1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
006ea73e 54#include "iostat.h"
1da177e4
LT
55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
2066fe89 58#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT
59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
cdd4e68b 61struct nfs4_opendata;
864472e9 62static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 63static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 64static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
1da177e4 65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
faf5f49c 66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
adfa6f98 67static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
1da177e4 68
1da177e4
LT
69/* Prevent leaks of NFSv4 errors into userland */
70int nfs4_map_errors(int err)
71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
74 __FUNCTION__, -err);
75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT
110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
830b8e33
MN
122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
bc4785cd 141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT
142 struct nfs4_readdir_arg *readdir)
143{
0dbb4c67 144 __be32 *start, *p;
1da177e4
LT
145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
b7ef1956 148 readdir->cookie = cookie;
1da177e4
LT
149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
0dbb4c67 165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT
166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
26e976a8 196static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 197{
7539bbab 198 struct nfs_client *clp = server->nfs_client;
1da177e4
LT
199 spin_lock(&clp->cl_lock);
200 if (time_before(clp->cl_last_renewal,timestamp))
201 clp->cl_last_renewal = timestamp;
202 spin_unlock(&clp->cl_lock);
203}
204
38478b24 205static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 206{
38478b24 207 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 208
38478b24
TM
209 spin_lock(&dir->i_lock);
210 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
1da177e4
LT
211 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
212 nfsi->change_attr = cinfo->after;
38478b24 213 spin_unlock(&dir->i_lock);
1da177e4
LT
214}
215
e56e0b78 216struct nfs4_opendata {
c6d00e63 217 struct kref kref;
e56e0b78
TM
218 struct nfs_openargs o_arg;
219 struct nfs_openres o_res;
cdd4e68b
TM
220 struct nfs_open_confirmargs c_arg;
221 struct nfs_open_confirmres c_res;
e56e0b78
TM
222 struct nfs_fattr f_attr;
223 struct nfs_fattr dir_attr;
ad389da7 224 struct path path;
e56e0b78
TM
225 struct dentry *dir;
226 struct nfs4_state_owner *owner;
227 struct iattr attrs;
26e976a8 228 unsigned long timestamp;
24ac23ab
TM
229 int rpc_status;
230 int cancelled;
e56e0b78
TM
231};
232
2ced46c2
TM
233
234static void nfs4_init_opendata_res(struct nfs4_opendata *p)
235{
236 p->o_res.f_attr = &p->f_attr;
237 p->o_res.dir_attr = &p->dir_attr;
238 p->o_res.server = p->o_arg.server;
239 nfs_fattr_init(&p->f_attr);
240 nfs_fattr_init(&p->dir_attr);
241}
242
ad389da7 243static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
e56e0b78
TM
244 struct nfs4_state_owner *sp, int flags,
245 const struct iattr *attrs)
246{
ad389da7 247 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM
248 struct inode *dir = parent->d_inode;
249 struct nfs_server *server = NFS_SERVER(dir);
250 struct nfs4_opendata *p;
251
252 p = kzalloc(sizeof(*p), GFP_KERNEL);
253 if (p == NULL)
254 goto err;
255 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
256 if (p->o_arg.seqid == NULL)
257 goto err_free;
ad389da7
TM
258 p->path.mnt = mntget(path->mnt);
259 p->path.dentry = dget(path->dentry);
e56e0b78
TM
260 p->dir = parent;
261 p->owner = sp;
262 atomic_inc(&sp->so_count);
263 p->o_arg.fh = NFS_FH(dir);
264 p->o_arg.open_flags = flags,
7539bbab 265 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 266 p->o_arg.id = sp->so_owner_id.id;
ad389da7 267 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM
268 p->o_arg.server = server;
269 p->o_arg.bitmask = server->attr_bitmask;
270 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM
271 if (flags & O_EXCL) {
272 u32 *s = (u32 *) p->o_arg.u.verifier.data;
273 s[0] = jiffies;
274 s[1] = current->pid;
275 } else if (flags & O_CREAT) {
276 p->o_arg.u.attrs = &p->attrs;
277 memcpy(&p->attrs, attrs, sizeof(p->attrs));
278 }
cdd4e68b
TM
279 p->c_arg.fh = &p->o_res.fh;
280 p->c_arg.stateid = &p->o_res.stateid;
281 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 282 nfs4_init_opendata_res(p);
c6d00e63 283 kref_init(&p->kref);
e56e0b78
TM
284 return p;
285err_free:
286 kfree(p);
287err:
288 dput(parent);
289 return NULL;
290}
291
c6d00e63 292static void nfs4_opendata_free(struct kref *kref)
e56e0b78 293{
c6d00e63
TM
294 struct nfs4_opendata *p = container_of(kref,
295 struct nfs4_opendata, kref);
296
297 nfs_free_seqid(p->o_arg.seqid);
298 nfs4_put_state_owner(p->owner);
299 dput(p->dir);
300 dput(p->path.dentry);
301 mntput(p->path.mnt);
302 kfree(p);
303}
304
305static void nfs4_opendata_put(struct nfs4_opendata *p)
306{
307 if (p != NULL)
308 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM
309}
310
06f814a3
TM
311static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
312{
313 sigset_t oldset;
314 int ret;
315
316 rpc_clnt_sigmask(task->tk_client, &oldset);
317 ret = rpc_wait_for_completion_task(task);
318 rpc_clnt_sigunmask(task->tk_client, &oldset);
319 return ret;
320}
321
e7616923
TM
322static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
323{
324 switch (open_flags) {
325 case FMODE_WRITE:
326 state->n_wronly++;
327 break;
328 case FMODE_READ:
329 state->n_rdonly++;
330 break;
331 case FMODE_READ|FMODE_WRITE:
332 state->n_rdwr++;
333 }
334}
335
1da177e4
LT
336static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
337{
338 struct inode *inode = state->inode;
339
340 open_flags &= (FMODE_READ|FMODE_WRITE);
d530838b 341 /* Protect against nfs4_find_state_byowner() */
ec073428 342 spin_lock(&state->owner->so_lock);
1da177e4 343 spin_lock(&inode->i_lock);
4cecb76f 344 memcpy(&state->stateid, stateid, sizeof(state->stateid));
e7616923 345 update_open_stateflags(state, open_flags);
4cecb76f 346 nfs4_state_set_mode_locked(state, state->state | open_flags);
1da177e4 347 spin_unlock(&inode->i_lock);
ec073428 348 spin_unlock(&state->owner->so_lock);
1da177e4
LT
349}
350
24ac23ab
TM
351static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
352{
353 struct inode *inode;
354 struct nfs4_state *state = NULL;
355
356 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
357 goto out;
358 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
03f28e3a 359 if (IS_ERR(inode))
24ac23ab
TM
360 goto out;
361 state = nfs4_get_open_state(inode, data->owner);
362 if (state == NULL)
363 goto put_inode;
364 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
549d6ed5
TM
365 if (data->o_res.delegation_type != 0) {
366 struct nfs_inode *nfsi = NFS_I(inode);
367 int delegation_flags = 0;
368
369 if (nfsi->delegation)
370 delegation_flags = nfsi->delegation->flags;
371 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
372 nfs_inode_set_delegation(state->inode,
373 data->owner->so_cred,
374 &data->o_res);
375 else
376 nfs_inode_reclaim_delegation(state->inode,
377 data->owner->so_cred,
378 &data->o_res);
379 }
24ac23ab
TM
380put_inode:
381 iput(inode);
382out:
383 return state;
384}
385
864472e9
TM
386static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
387{
388 struct nfs_inode *nfsi = NFS_I(state->inode);
389 struct nfs_open_context *ctx;
390
391 spin_lock(&state->inode->i_lock);
392 list_for_each_entry(ctx, &nfsi->open_files, list) {
393 if (ctx->state != state)
394 continue;
395 get_nfs_open_context(ctx);
396 spin_unlock(&state->inode->i_lock);
397 return ctx;
398 }
399 spin_unlock(&state->inode->i_lock);
400 return ERR_PTR(-ENOENT);
401}
402
2ced46c2 403static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 404{
2ced46c2 405 struct nfs4_state *newstate;
864472e9
TM
406 int ret;
407
408 opendata->o_arg.open_flags = openflags;
2ced46c2
TM
409 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
410 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
411 nfs4_init_opendata_res(opendata);
864472e9
TM
412 ret = _nfs4_proc_open(opendata);
413 if (ret != 0)
414 return ret;
2ced46c2
TM
415 newstate = nfs4_opendata_to_nfs4_state(opendata);
416 if (newstate != NULL)
417 nfs4_close_state(&opendata->path, newstate, openflags);
418 *res = newstate;
864472e9
TM
419 return 0;
420}
421
422static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
423{
864472e9 424 struct nfs4_state *newstate;
864472e9
TM
425 int ret;
426
427 /* memory barrier prior to reading state->n_* */
2ced46c2 428 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM
429 smp_rmb();
430 if (state->n_rdwr != 0) {
2ced46c2 431 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM
432 if (ret != 0)
433 return ret;
2ced46c2
TM
434 if (newstate != state)
435 return -ESTALE;
864472e9
TM
436 }
437 if (state->n_wronly != 0) {
2ced46c2 438 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM
439 if (ret != 0)
440 return ret;
2ced46c2
TM
441 if (newstate != state)
442 return -ESTALE;
864472e9
TM
443 }
444 if (state->n_rdonly != 0) {
2ced46c2 445 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM
446 if (ret != 0)
447 return ret;
2ced46c2
TM
448 if (newstate != state)
449 return -ESTALE;
864472e9 450 }
864472e9
TM
451 return 0;
452}
453
1da177e4
LT
454/*
455 * OPEN_RECLAIM:
456 * reclaim state on the server after a reboot.
1da177e4 457 */
539cd03a 458static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 459{
864472e9
TM
460 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
461 struct nfs4_opendata *opendata;
462 int delegation_type = 0;
1da177e4
LT
463 int status;
464
465 if (delegation != NULL) {
466 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
467 memcpy(&state->stateid, &delegation->stateid,
468 sizeof(state->stateid));
469 set_bit(NFS_DELEGATED_STATE, &state->flags);
470 return 0;
471 }
864472e9 472 delegation_type = delegation->type;
1da177e4 473 }
ad389da7 474 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
864472e9 475 if (opendata == NULL)
cee54fc9 476 return -ENOMEM;
864472e9
TM
477 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
478 opendata->o_arg.fh = NFS_FH(state->inode);
479 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
480 opendata->o_arg.u.delegation_type = delegation_type;
481 status = nfs4_open_recover(opendata, state);
c6d00e63 482 nfs4_opendata_put(opendata);
1da177e4
LT
483 return status;
484}
485
539cd03a 486static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT
487{
488 struct nfs_server *server = NFS_SERVER(state->inode);
489 struct nfs4_exception exception = { };
490 int err;
491 do {
539cd03a 492 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM
493 if (err != -NFS4ERR_DELAY)
494 break;
495 nfs4_handle_exception(server, err, &exception);
1da177e4
LT
496 } while (exception.retry);
497 return err;
498}
499
864472e9
TM
500static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
501{
502 struct nfs_open_context *ctx;
503 int ret;
504
505 ctx = nfs4_state_find_open_context(state);
506 if (IS_ERR(ctx))
507 return PTR_ERR(ctx);
539cd03a 508 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM
509 put_nfs_open_context(ctx);
510 return ret;
511}
512
539cd03a 513static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT
514{
515 struct nfs4_state_owner *sp = state->owner;
e56e0b78 516 struct nfs4_opendata *opendata;
864472e9 517 int ret;
1da177e4 518
1da177e4 519 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
864472e9 520 return 0;
ad389da7 521 opendata = nfs4_opendata_alloc(&ctx->path, sp, 0, NULL);
e56e0b78 522 if (opendata == NULL)
864472e9 523 return -ENOMEM;
e56e0b78 524 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
e56e0b78
TM
525 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
526 sizeof(opendata->o_arg.u.delegation.data));
864472e9 527 ret = nfs4_open_recover(opendata, state);
c6d00e63 528 nfs4_opendata_put(opendata);
864472e9 529 return ret;
1da177e4
LT
530}
531
539cd03a 532int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT
533{
534 struct nfs4_exception exception = { };
539cd03a 535 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT
536 int err;
537 do {
539cd03a 538 err = _nfs4_open_delegation_recall(ctx, state);
1da177e4
LT
539 switch (err) {
540 case 0:
541 return err;
542 case -NFS4ERR_STALE_CLIENTID:
543 case -NFS4ERR_STALE_STATEID:
544 case -NFS4ERR_EXPIRED:
545 /* Don't recall a delegation if it was lost */
7539bbab 546 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT
547 return err;
548 }
549 err = nfs4_handle_exception(server, err, &exception);
550 } while (exception.retry);
551 return err;
552}
553
cdd4e68b 554static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 555{
cdd4e68b
TM
556 struct nfs4_opendata *data = calldata;
557 struct rpc_message msg = {
558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
559 .rpc_argp = &data->c_arg,
560 .rpc_resp = &data->c_res,
561 .rpc_cred = data->owner->so_cred,
1da177e4 562 };
26e976a8 563 data->timestamp = jiffies;
cdd4e68b
TM
564 rpc_call_setup(task, &msg, 0);
565}
566
567static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
568{
569 struct nfs4_opendata *data = calldata;
570
571 data->rpc_status = task->tk_status;
572 if (RPC_ASSASSINATED(task))
573 return;
26e976a8 574 if (data->rpc_status == 0) {
cdd4e68b
TM
575 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
576 sizeof(data->o_res.stateid.data));
26e976a8
TM
577 renew_lease(data->o_res.server, data->timestamp);
578 }
cdd4e68b
TM
579 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
580 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
581}
582
583static void nfs4_open_confirm_release(void *calldata)
584{
585 struct nfs4_opendata *data = calldata;
586 struct nfs4_state *state = NULL;
587
588 /* If this request hasn't been cancelled, do nothing */
589 if (data->cancelled == 0)
590 goto out_free;
591 /* In case of error, no cleanup! */
592 if (data->rpc_status != 0)
593 goto out_free;
594 nfs_confirm_seqid(&data->owner->so_seqid, 0);
595 state = nfs4_opendata_to_nfs4_state(data);
596 if (state != NULL)
4a35bd41 597 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 598out_free:
c6d00e63 599 nfs4_opendata_put(data);
cdd4e68b
TM
600}
601
602static const struct rpc_call_ops nfs4_open_confirm_ops = {
603 .rpc_call_prepare = nfs4_open_confirm_prepare,
604 .rpc_call_done = nfs4_open_confirm_done,
605 .rpc_release = nfs4_open_confirm_release,
606};
607
608/*
609 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
610 */
611static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
612{
613 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
614 struct rpc_task *task;
1da177e4
LT
615 int status;
616
c6d00e63 617 kref_get(&data->kref);
7a1218a2
TM
618 /*
619 * If rpc_run_task() ends up calling ->rpc_release(), we
620 * want to ensure that it takes the 'error' code path.
621 */
622 data->rpc_status = -ENOMEM;
cdd4e68b 623 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
7a1218a2 624 if (IS_ERR(task))
cdd4e68b 625 return PTR_ERR(task);
cdd4e68b
TM
626 status = nfs4_wait_for_completion_rpc_task(task);
627 if (status != 0) {
628 data->cancelled = 1;
629 smp_wmb();
630 } else
631 status = data->rpc_status;
e6b3c4db 632 rpc_put_task(task);
1da177e4
LT
633 return status;
634}
635
24ac23ab 636static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 637{
24ac23ab
TM
638 struct nfs4_opendata *data = calldata;
639 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT
640 struct rpc_message msg = {
641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM
642 .rpc_argp = &data->o_arg,
643 .rpc_resp = &data->o_res,
1da177e4
LT
644 .rpc_cred = sp->so_cred,
645 };
24ac23ab
TM
646
647 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
648 return;
649 /* Update sequence id. */
9f958ab8 650 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 651 data->o_arg.clientid = sp->so_client->cl_clientid;
864472e9
TM
652 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
653 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
26e976a8 654 data->timestamp = jiffies;
24ac23ab
TM
655 rpc_call_setup(task, &msg, 0);
656}
1da177e4 657
24ac23ab
TM
658static void nfs4_open_done(struct rpc_task *task, void *calldata)
659{
660 struct nfs4_opendata *data = calldata;
1da177e4 661
24ac23ab
TM
662 data->rpc_status = task->tk_status;
663 if (RPC_ASSASSINATED(task))
664 return;
665 if (task->tk_status == 0) {
666 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM
667 case S_IFREG:
668 break;
669 case S_IFLNK:
24ac23ab 670 data->rpc_status = -ELOOP;
6f926b5b
TM
671 break;
672 case S_IFDIR:
24ac23ab 673 data->rpc_status = -EISDIR;
6f926b5b
TM
674 break;
675 default:
24ac23ab 676 data->rpc_status = -ENOTDIR;
6f926b5b 677 }
26e976a8 678 renew_lease(data->o_res.server, data->timestamp);
6f926b5b 679 }
24ac23ab
TM
680 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
681}
6f926b5b 682
24ac23ab
TM
683static void nfs4_open_release(void *calldata)
684{
685 struct nfs4_opendata *data = calldata;
686 struct nfs4_state *state = NULL;
687
688 /* If this request hasn't been cancelled, do nothing */
689 if (data->cancelled == 0)
690 goto out_free;
691 /* In case of error, no cleanup! */
692 if (data->rpc_status != 0)
693 goto out_free;
694 /* In case we need an open_confirm, no cleanup! */
695 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
696 goto out_free;
697 nfs_confirm_seqid(&data->owner->so_seqid, 0);
698 state = nfs4_opendata_to_nfs4_state(data);
699 if (state != NULL)
4a35bd41 700 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 701out_free:
c6d00e63 702 nfs4_opendata_put(data);
24ac23ab
TM
703}
704
705static const struct rpc_call_ops nfs4_open_ops = {
706 .rpc_call_prepare = nfs4_open_prepare,
707 .rpc_call_done = nfs4_open_done,
708 .rpc_release = nfs4_open_release,
709};
710
711/*
712 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
713 */
714static int _nfs4_proc_open(struct nfs4_opendata *data)
715{
716 struct inode *dir = data->dir->d_inode;
717 struct nfs_server *server = NFS_SERVER(dir);
718 struct nfs_openargs *o_arg = &data->o_arg;
719 struct nfs_openres *o_res = &data->o_res;
720 struct rpc_task *task;
721 int status;
722
c6d00e63 723 kref_get(&data->kref);
7a1218a2
TM
724 /*
725 * If rpc_run_task() ends up calling ->rpc_release(), we
726 * want to ensure that it takes the 'error' code path.
727 */
728 data->rpc_status = -ENOMEM;
2ced46c2 729 data->cancelled = 0;
24ac23ab 730 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
7a1218a2 731 if (IS_ERR(task))
24ac23ab 732 return PTR_ERR(task);
24ac23ab
TM
733 status = nfs4_wait_for_completion_rpc_task(task);
734 if (status != 0) {
735 data->cancelled = 1;
736 smp_wmb();
737 } else
738 status = data->rpc_status;
e6b3c4db 739 rpc_put_task(task);
1da177e4 740 if (status != 0)
24ac23ab
TM
741 return status;
742
56ae19f3
TM
743 if (o_arg->open_flags & O_CREAT) {
744 update_changeattr(dir, &o_res->cinfo);
745 nfs_post_op_update_inode(dir, o_res->dir_attr);
746 } else
747 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 748 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 749 status = _nfs4_proc_open_confirm(data);
1da177e4 750 if (status != 0)
24ac23ab 751 return status;
1da177e4 752 }
24ac23ab 753 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1da177e4 754 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8fa5c000 755 return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 756 return 0;
1da177e4
LT
757}
758
759static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
760{
761 struct nfs_access_entry cache;
762 int mask = 0;
763 int status;
764
765 if (openflags & FMODE_READ)
766 mask |= MAY_READ;
767 if (openflags & FMODE_WRITE)
768 mask |= MAY_WRITE;
1b45c46c
TM
769 if (openflags & FMODE_EXEC)
770 mask |= MAY_EXEC;
1da177e4
LT
771 status = nfs_access_get_cached(inode, cred, &cache);
772 if (status == 0)
773 goto out;
774
775 /* Be clever: ask server to check for all possible rights */
776 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
777 cache.cred = cred;
778 cache.jiffies = jiffies;
779 status = _nfs4_proc_access(inode, &cache);
780 if (status != 0)
781 return status;
782 nfs_access_add_cache(inode, &cache);
783out:
784 if ((cache.mask & mask) == mask)
785 return 0;
786 return -EACCES;
787}
788
10afec90 789static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 790{
7539bbab 791 struct nfs_client *clp = server->nfs_client;
6b30954e 792 int ret;
58d9714a 793
6b30954e
TM
794 for (;;) {
795 ret = nfs4_wait_clnt_recover(server->client, clp);
796 if (ret != 0)
797 return ret;
798 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
799 break;
58d9714a 800 nfs4_schedule_state_recovery(clp);
6b30954e
TM
801 }
802 return 0;
58d9714a
TM
803}
804
1da177e4
LT
805/*
806 * OPEN_EXPIRED:
807 * reclaim state on the server after a network partition.
808 * Assumes caller holds the appropriate lock
809 */
539cd03a 810static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 811{
1da177e4 812 struct inode *inode = state->inode;
1da177e4 813 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
e56e0b78 814 struct nfs4_opendata *opendata;
24ac23ab 815 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
864472e9 816 int ret;
1da177e4
LT
817
818 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
539cd03a 819 ret = _nfs4_do_access(inode, ctx->cred, openflags);
864472e9
TM
820 if (ret < 0)
821 return ret;
1da177e4
LT
822 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
823 set_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9 824 return 0;
1da177e4 825 }
ad389da7 826 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, openflags, NULL);
e56e0b78 827 if (opendata == NULL)
864472e9
TM
828 return -ENOMEM;
829 ret = nfs4_open_recover(opendata, state);
830 if (ret == -ESTALE) {
831 /* Invalidate the state owner so we don't ever use it again */
539cd03a
TM
832 nfs4_drop_state_owner(state->owner);
833 d_drop(ctx->path.dentry);
1da177e4 834 }
c6d00e63 835 nfs4_opendata_put(opendata);
864472e9 836 return ret;
1da177e4
LT
837}
838
539cd03a 839static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 840{
539cd03a 841 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM
842 struct nfs4_exception exception = { };
843 int err;
844
845 do {
539cd03a 846 err = _nfs4_open_expired(ctx, state);
202b50dc
TM
847 if (err == -NFS4ERR_DELAY)
848 nfs4_handle_exception(server, err, &exception);
849 } while (exception.retry);
850 return err;
851}
852
1da177e4
LT
853static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
854{
1da177e4 855 struct nfs_open_context *ctx;
864472e9 856 int ret;
1da177e4 857
864472e9
TM
858 ctx = nfs4_state_find_open_context(state);
859 if (IS_ERR(ctx))
860 return PTR_ERR(ctx);
539cd03a 861 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM
862 put_nfs_open_context(ctx);
863 return ret;
1da177e4
LT
864}
865
866/*
24ac23ab 867 * Returns a referenced nfs4_state if there is an open delegation on the file
1da177e4
LT
868 */
869static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
870{
871 struct nfs_delegation *delegation;
872 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 873 struct nfs_client *clp = server->nfs_client;
1da177e4
LT
874 struct nfs_inode *nfsi = NFS_I(inode);
875 struct nfs4_state_owner *sp = NULL;
876 struct nfs4_state *state = NULL;
877 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
878 int err;
879
b4454fe1
TM
880 err = -ENOMEM;
881 if (!(sp = nfs4_get_state_owner(server, cred))) {
882 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
883 return err;
884 }
58d9714a
TM
885 err = nfs4_recover_expired_lease(server);
886 if (err != 0)
b4454fe1 887 goto out_put_state_owner;
1da177e4
LT
888 /* Protect against reboot recovery - NOTE ORDER! */
889 down_read(&clp->cl_sem);
890 /* Protect against delegation recall */
891 down_read(&nfsi->rwsem);
892 delegation = NFS_I(inode)->delegation;
893 err = -ENOENT;
894 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
895 goto out_err;
896 err = -ENOMEM;
1da177e4
LT
897 state = nfs4_get_open_state(inode, sp);
898 if (state == NULL)
899 goto out_err;
900
901 err = -ENOENT;
902 if ((state->state & open_flags) == open_flags) {
903 spin_lock(&inode->i_lock);
e7616923 904 update_open_stateflags(state, open_flags);
1da177e4
LT
905 spin_unlock(&inode->i_lock);
906 goto out_ok;
907 } else if (state->state != 0)
b4454fe1 908 goto out_put_open_state;
1da177e4
LT
909
910 lock_kernel();
911 err = _nfs4_do_access(inode, cred, open_flags);
912 unlock_kernel();
913 if (err != 0)
b4454fe1 914 goto out_put_open_state;
1da177e4
LT
915 set_bit(NFS_DELEGATED_STATE, &state->flags);
916 update_open_stateid(state, &delegation->stateid, open_flags);
917out_ok:
1da177e4
LT
918 nfs4_put_state_owner(sp);
919 up_read(&nfsi->rwsem);
920 up_read(&clp->cl_sem);
1da177e4 921 *res = state;
b4454fe1
TM
922 return 0;
923out_put_open_state:
924 nfs4_put_open_state(state);
1da177e4 925out_err:
1da177e4
LT
926 up_read(&nfsi->rwsem);
927 up_read(&clp->cl_sem);
b8e5c4c2
TM
928 if (err != -EACCES)
929 nfs_inode_return_delegation(inode);
b4454fe1
TM
930out_put_state_owner:
931 nfs4_put_state_owner(sp);
1da177e4
LT
932 return err;
933}
934
935static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
936{
937 struct nfs4_exception exception = { };
a162a6b8 938 struct nfs4_state *res = ERR_PTR(-EIO);
1da177e4
LT
939 int err;
940
941 do {
942 err = _nfs4_open_delegated(inode, flags, cred, &res);
943 if (err == 0)
944 break;
945 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
946 err, &exception));
947 } while (exception.retry);
948 return res;
949}
950
aa53ed54
JL
951/*
952 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
953 * fields corresponding to attributes that were used to store the verifier.
954 * Make sure we clobber those fields in the later setattr call
955 */
956static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
957{
958 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
959 !(sattr->ia_valid & ATTR_ATIME_SET))
960 sattr->ia_valid |= ATTR_ATIME;
961
962 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
963 !(sattr->ia_valid & ATTR_MTIME_SET))
964 sattr->ia_valid |= ATTR_MTIME;
965}
966
1da177e4 967/*
24ac23ab 968 * Returns a referenced nfs4_state
1da177e4 969 */
ad389da7 970static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT
971{
972 struct nfs4_state_owner *sp;
973 struct nfs4_state *state = NULL;
974 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 975 struct nfs_client *clp = server->nfs_client;
e56e0b78 976 struct nfs4_opendata *opendata;
1da177e4 977 int status;
1da177e4
LT
978
979 /* Protect against reboot recovery conflicts */
1da177e4
LT
980 status = -ENOMEM;
981 if (!(sp = nfs4_get_state_owner(server, cred))) {
982 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
983 goto out_err;
984 }
58d9714a
TM
985 status = nfs4_recover_expired_lease(server);
986 if (status != 0)
b4454fe1 987 goto err_put_state_owner;
58d9714a
TM
988 down_read(&clp->cl_sem);
989 status = -ENOMEM;
ad389da7 990 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 991 if (opendata == NULL)
76723de0 992 goto err_release_rwsem;
1da177e4 993
24ac23ab 994 status = _nfs4_proc_open(opendata);
1da177e4 995 if (status != 0)
c6d00e63 996 goto err_opendata_put;
1da177e4 997
aa53ed54
JL
998 if (opendata->o_arg.open_flags & O_EXCL)
999 nfs4_exclusive_attrset(opendata, sattr);
1000
1da177e4 1001 status = -ENOMEM;
24ac23ab
TM
1002 state = nfs4_opendata_to_nfs4_state(opendata);
1003 if (state == NULL)
c6d00e63 1004 goto err_opendata_put;
c6d00e63 1005 nfs4_opendata_put(opendata);
1da177e4
LT
1006 nfs4_put_state_owner(sp);
1007 up_read(&clp->cl_sem);
1008 *res = state;
1009 return 0;
c6d00e63
TM
1010err_opendata_put:
1011 nfs4_opendata_put(opendata);
76723de0
TM
1012err_release_rwsem:
1013 up_read(&clp->cl_sem);
e56e0b78
TM
1014err_put_state_owner:
1015 nfs4_put_state_owner(sp);
1da177e4 1016out_err:
1da177e4
LT
1017 *res = NULL;
1018 return status;
1019}
1020
1021
ad389da7 1022static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT
1023{
1024 struct nfs4_exception exception = { };
1025 struct nfs4_state *res;
1026 int status;
1027
1028 do {
ad389da7 1029 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT
1030 if (status == 0)
1031 break;
1032 /* NOTE: BAD_SEQID means the server and client disagree about the
1033 * book-keeping w.r.t. state-changing operations
1034 * (OPEN/CLOSE/LOCK/LOCKU...)
1035 * It is actually a sign of a bug on the client or on the server.
1036 *
1037 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1038 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT
1039 * have unhashed the old state_owner for us, and that we can
1040 * therefore safely retry using a new one. We should still warn
1041 * the user though...
1042 */
1043 if (status == -NFS4ERR_BAD_SEQID) {
1044 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1045 exception.retry = 1;
1046 continue;
1047 }
550f5747
TM
1048 /*
1049 * BAD_STATEID on OPEN means that the server cancelled our
1050 * state before it received the OPEN_CONFIRM.
1051 * Recover by retrying the request as per the discussion
1052 * on Page 181 of RFC3530.
1053 */
1054 if (status == -NFS4ERR_BAD_STATEID) {
1055 exception.retry = 1;
1056 continue;
1057 }
1da177e4
LT
1058 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1059 status, &exception));
1060 } while (exception.retry);
1061 return res;
1062}
1063
3e4f6290
TM
1064static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1065 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1066{
3e4f6290 1067 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1068 struct nfs_setattrargs arg = {
3e4f6290 1069 .fh = NFS_FH(inode),
1da177e4
LT
1070 .iap = sattr,
1071 .server = server,
1072 .bitmask = server->attr_bitmask,
1073 };
1074 struct nfs_setattrres res = {
1075 .fattr = fattr,
1076 .server = server,
1077 };
1078 struct rpc_message msg = {
1079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1080 .rpc_argp = &arg,
1081 .rpc_resp = &res,
1082 };
26e976a8 1083 unsigned long timestamp = jiffies;
65e4308d 1084 int status;
1da177e4 1085
0e574af1 1086 nfs_fattr_init(fattr);
1da177e4 1087
3e4f6290
TM
1088 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1089 /* Use that stateid */
1090 } else if (state != NULL) {
1da177e4 1091 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM
1092 nfs4_copy_stateid(&arg.stateid, state, current->files);
1093 } else
1da177e4
LT
1094 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1095
65e4308d 1096 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM
1097 if (status == 0 && state != NULL)
1098 renew_lease(server, timestamp);
65e4308d 1099 return status;
1da177e4
LT
1100}
1101
3e4f6290
TM
1102static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1103 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1104{
3e4f6290 1105 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT
1106 struct nfs4_exception exception = { };
1107 int err;
1108 do {
1109 err = nfs4_handle_exception(server,
3e4f6290 1110 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT
1111 &exception);
1112 } while (exception.retry);
1113 return err;
1114}
1115
1116struct nfs4_closedata {
4a35bd41 1117 struct path path;
1da177e4
LT
1118 struct inode *inode;
1119 struct nfs4_state *state;
1120 struct nfs_closeargs arg;
1121 struct nfs_closeres res;
516a6af6 1122 struct nfs_fattr fattr;
26e976a8 1123 unsigned long timestamp;
1da177e4
LT
1124};
1125
963d8fe5 1126static void nfs4_free_closedata(void *data)
9512135d 1127{
963d8fe5
TM
1128 struct nfs4_closedata *calldata = data;
1129 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM
1130
1131 nfs4_put_open_state(calldata->state);
1132 nfs_free_seqid(calldata->arg.seqid);
9512135d 1133 nfs4_put_state_owner(sp);
4a35bd41
TM
1134 dput(calldata->path.dentry);
1135 mntput(calldata->path.mnt);
9512135d
TM
1136 kfree(calldata);
1137}
1138
963d8fe5 1139static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1140{
963d8fe5 1141 struct nfs4_closedata *calldata = data;
1da177e4 1142 struct nfs4_state *state = calldata->state;
1da177e4
LT
1143 struct nfs_server *server = NFS_SERVER(calldata->inode);
1144
4ce70ada
TM
1145 if (RPC_ASSASSINATED(task))
1146 return;
1da177e4
LT
1147 /* hmm. we are done with the inode, and in the process of freeing
1148 * the state_owner. we keep this around to process errors
1149 */
cee54fc9 1150 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT
1151 switch (task->tk_status) {
1152 case 0:
1153 memcpy(&state->stateid, &calldata->res.stateid,
1154 sizeof(state->stateid));
26e976a8 1155 renew_lease(server, calldata->timestamp);
1da177e4
LT
1156 break;
1157 case -NFS4ERR_STALE_STATEID:
1158 case -NFS4ERR_EXPIRED:
1da177e4
LT
1159 break;
1160 default:
1161 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1162 rpc_restart_call(task);
1163 return;
1164 }
1165 }
516a6af6 1166 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT
1167}
1168
4ce70ada 1169static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1170{
4ce70ada 1171 struct nfs4_closedata *calldata = data;
9512135d 1172 struct nfs4_state *state = calldata->state;
1da177e4
LT
1173 struct rpc_message msg = {
1174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1175 .rpc_argp = &calldata->arg,
1176 .rpc_resp = &calldata->res,
9512135d 1177 .rpc_cred = state->owner->so_cred,
1da177e4 1178 };
4cecb76f 1179 int mode = 0, old_mode;
9512135d 1180
963d8fe5 1181 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1182 return;
9512135d
TM
1183 /* Recalculate the new open mode in case someone reopened the file
1184 * while we were waiting in line to be scheduled.
1185 */
4cecb76f
TM
1186 spin_lock(&state->owner->so_lock);
1187 spin_lock(&calldata->inode->i_lock);
1188 mode = old_mode = state->state;
e7616923
TM
1189 if (state->n_rdwr == 0) {
1190 if (state->n_rdonly == 0)
1191 mode &= ~FMODE_READ;
1192 if (state->n_wronly == 0)
1193 mode &= ~FMODE_WRITE;
1194 }
4cecb76f
TM
1195 nfs4_state_set_mode_locked(state, mode);
1196 spin_unlock(&calldata->inode->i_lock);
1197 spin_unlock(&state->owner->so_lock);
1198 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
963d8fe5
TM
1199 /* Note: exit _without_ calling nfs4_close_done */
1200 task->tk_action = NULL;
9512135d
TM
1201 return;
1202 }
516a6af6 1203 nfs_fattr_init(calldata->res.fattr);
9512135d 1204 if (mode != 0)
1da177e4 1205 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d 1206 calldata->arg.open_flags = mode;
26e976a8 1207 calldata->timestamp = jiffies;
9512135d 1208 rpc_call_setup(task, &msg, 0);
1da177e4
LT
1209}
1210
963d8fe5 1211static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1212 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM
1213 .rpc_call_done = nfs4_close_done,
1214 .rpc_release = nfs4_free_closedata,
1215};
1216
1da177e4
LT
1217/*
1218 * It is possible for data to be read/written from a mem-mapped file
1219 * after the sys_close call (which hits the vfs layer as a flush).
1220 * This means that we can't safely call nfsv4 close on a file until
1221 * the inode is cleared. This in turn means that we are not good
1222 * NFSv4 citizens - we do not indicate to the server to update the file's
1223 * share state even when we are done with one of the three share
1224 * stateid's in the inode.
1225 *
1226 * NOTE: Caller must be holding the sp->so_owner semaphore!
1227 */
4a35bd41 1228int nfs4_do_close(struct path *path, struct nfs4_state *state)
1da177e4 1229{
4a35bd41 1230 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1231 struct nfs4_closedata *calldata;
b39e625b
TM
1232 struct nfs4_state_owner *sp = state->owner;
1233 struct rpc_task *task;
9512135d 1234 int status = -ENOMEM;
1da177e4 1235
9512135d 1236 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1237 if (calldata == NULL)
9512135d 1238 goto out;
4a35bd41 1239 calldata->inode = state->inode;
1da177e4 1240 calldata->state = state;
4a35bd41 1241 calldata->arg.fh = NFS_FH(state->inode);
9512135d 1242 calldata->arg.stateid = &state->stateid;
1da177e4 1243 /* Serialization for the sequence id */
cee54fc9 1244 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM
1245 if (calldata->arg.seqid == NULL)
1246 goto out_free_calldata;
516a6af6
TM
1247 calldata->arg.bitmask = server->attr_bitmask;
1248 calldata->res.fattr = &calldata->fattr;
1249 calldata->res.server = server;
4a35bd41
TM
1250 calldata->path.mnt = mntget(path->mnt);
1251 calldata->path.dentry = dget(path->dentry);
9512135d 1252
b39e625b
TM
1253 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1254 if (IS_ERR(task))
1255 return PTR_ERR(task);
1256 rpc_put_task(task);
1257 return 0;
9512135d
TM
1258out_free_calldata:
1259 kfree(calldata);
1260out:
b39e625b
TM
1261 nfs4_put_open_state(state);
1262 nfs4_put_state_owner(sp);
9512135d 1263 return status;
1da177e4
LT
1264}
1265
4a35bd41 1266static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM
1267{
1268 struct file *filp;
1b45c46c 1269 int ret;
02a913a7 1270
1b45c46c
TM
1271 /* If the open_intent is for execute, we have an extra check to make */
1272 if (nd->intent.open.flags & FMODE_EXEC) {
1273 ret = _nfs4_do_access(state->inode,
1274 state->owner->so_cred,
1275 nd->intent.open.flags);
1276 if (ret < 0)
1277 goto out_close;
1278 }
4a35bd41 1279 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM
1280 if (!IS_ERR(filp)) {
1281 struct nfs_open_context *ctx;
1282 ctx = (struct nfs_open_context *)filp->private_data;
1283 ctx->state = state;
95cf959b
TM
1284 return 0;
1285 }
1b45c46c
TM
1286 ret = PTR_ERR(filp);
1287out_close:
4a35bd41 1288 nfs4_close_state(path, state, nd->intent.open.flags);
1b45c46c 1289 return ret;
02a913a7
TM
1290}
1291
1292struct dentry *
1da177e4
LT
1293nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1294{
ad389da7
TM
1295 struct path path = {
1296 .mnt = nd->mnt,
1297 .dentry = dentry,
1298 };
1da177e4
LT
1299 struct iattr attr;
1300 struct rpc_cred *cred;
1301 struct nfs4_state *state;
02a913a7 1302 struct dentry *res;
1da177e4
LT
1303
1304 if (nd->flags & LOOKUP_CREATE) {
1305 attr.ia_mode = nd->intent.open.create_mode;
1306 attr.ia_valid = ATTR_MODE;
1307 if (!IS_POSIXACL(dir))
1308 attr.ia_mode &= ~current->fs->umask;
1309 } else {
1310 attr.ia_valid = 0;
1311 BUG_ON(nd->intent.open.flags & O_CREAT);
1312 }
1313
1f163415 1314 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4 1315 if (IS_ERR(cred))
02a913a7 1316 return (struct dentry *)cred;
ad389da7 1317 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1318 put_rpccred(cred);
02a913a7
TM
1319 if (IS_ERR(state)) {
1320 if (PTR_ERR(state) == -ENOENT)
1321 d_add(dentry, NULL);
1322 return (struct dentry *)state;
1323 }
24ac23ab 1324 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM
1325 if (res != NULL)
1326 dentry = res;
4a35bd41 1327 nfs4_intent_set_file(nd, &path, state);
02a913a7 1328 return res;
1da177e4
LT
1329}
1330
1331int
02a913a7 1332nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1333{
ad389da7
TM
1334 struct path path = {
1335 .mnt = nd->mnt,
1336 .dentry = dentry,
1337 };
1da177e4
LT
1338 struct rpc_cred *cred;
1339 struct nfs4_state *state;
1da177e4 1340
1f163415 1341 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT
1342 if (IS_ERR(cred))
1343 return PTR_ERR(cred);
1344 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1345 if (IS_ERR(state))
ad389da7 1346 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1347 put_rpccred(cred);
02a913a7
TM
1348 if (IS_ERR(state)) {
1349 switch (PTR_ERR(state)) {
1350 case -EPERM:
1351 case -EACCES:
1352 case -EDQUOT:
1353 case -ENOSPC:
1354 case -EROFS:
1355 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1356 return 1;
b87c0adf
CL
1357 default:
1358 goto out_drop;
02a913a7 1359 }
02a913a7 1360 }
24ac23ab 1361 if (state->inode == dentry->d_inode) {
4a35bd41 1362 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT
1363 return 1;
1364 }
4a35bd41 1365 nfs4_close_state(&path, state, openflags);
02a913a7
TM
1366out_drop:
1367 d_drop(dentry);
1da177e4
LT
1368 return 0;
1369}
1370
1371
1372static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1373{
1374 struct nfs4_server_caps_res res = {};
1375 struct rpc_message msg = {
1376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1377 .rpc_argp = fhandle,
1378 .rpc_resp = &res,
1379 };
1380 int status;
1381
1382 status = rpc_call_sync(server->client, &msg, 0);
1383 if (status == 0) {
1384 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1385 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1386 server->caps |= NFS_CAP_ACLS;
1387 if (res.has_links != 0)
1388 server->caps |= NFS_CAP_HARDLINKS;
1389 if (res.has_symlinks != 0)
1390 server->caps |= NFS_CAP_SYMLINKS;
1391 server->acl_bitmask = res.acl_bitmask;
1392 }
1393 return status;
1394}
1395
55a97593 1396int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT
1397{
1398 struct nfs4_exception exception = { };
1399 int err;
1400 do {
1401 err = nfs4_handle_exception(server,
1402 _nfs4_server_capabilities(server, fhandle),
1403 &exception);
1404 } while (exception.retry);
1405 return err;
1406}
1407
1408static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1409 struct nfs_fsinfo *info)
1410{
1da177e4
LT
1411 struct nfs4_lookup_root_arg args = {
1412 .bitmask = nfs4_fattr_bitmap,
1413 };
1414 struct nfs4_lookup_res res = {
1415 .server = server,
0e574af1 1416 .fattr = info->fattr,
1da177e4
LT
1417 .fh = fhandle,
1418 };
1419 struct rpc_message msg = {
1420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1421 .rpc_argp = &args,
1422 .rpc_resp = &res,
1423 };
0e574af1 1424 nfs_fattr_init(info->fattr);
1da177e4
LT
1425 return rpc_call_sync(server->client, &msg, 0);
1426}
1427
1428static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1429 struct nfs_fsinfo *info)
1430{
1431 struct nfs4_exception exception = { };
1432 int err;
1433 do {
1434 err = nfs4_handle_exception(server,
1435 _nfs4_lookup_root(server, fhandle, info),
1436 &exception);
1437 } while (exception.retry);
1438 return err;
1439}
1440
54ceac45
DH
1441/*
1442 * get the file handle for the "/" directory on the server
1443 */
1da177e4 1444static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1445 struct nfs_fsinfo *info)
1da177e4 1446{
1da177e4
LT
1447 int status;
1448
1da177e4 1449 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT
1450 if (status == 0)
1451 status = nfs4_server_capabilities(server, fhandle);
1452 if (status == 0)
1453 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1454 return nfs4_map_errors(status);
1da177e4
LT
1455}
1456
6b97fd3d
MN
1457/*
1458 * Get locations and (maybe) other attributes of a referral.
1459 * Note that we'll actually follow the referral later when
1460 * we detect fsid mismatch in inode revalidation
1461 */
1462static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1463{
1464 int status = -ENOMEM;
1465 struct page *page = NULL;
1466 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN
1467
1468 page = alloc_page(GFP_KERNEL);
1469 if (page == NULL)
1470 goto out;
1471 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1472 if (locations == NULL)
1473 goto out;
1474
c228fd3a 1475 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN
1476 if (status != 0)
1477 goto out;
1478 /* Make sure server returned a different fsid for the referral */
1479 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1480 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1481 status = -EIO;
1482 goto out;
1483 }
1484
1485 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1486 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1487 if (!fattr->mode)
1488 fattr->mode = S_IFDIR;
1489 memset(fhandle, 0, sizeof(struct nfs_fh));
1490out:
1491 if (page)
1492 __free_page(page);
1493 if (locations)
1494 kfree(locations);
1495 return status;
1496}
1497
1da177e4
LT
1498static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1499{
1500 struct nfs4_getattr_arg args = {
1501 .fh = fhandle,
1502 .bitmask = server->attr_bitmask,
1503 };
1504 struct nfs4_getattr_res res = {
1505 .fattr = fattr,
1506 .server = server,
1507 };
1508 struct rpc_message msg = {
1509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1510 .rpc_argp = &args,
1511 .rpc_resp = &res,
1512 };
1513
0e574af1 1514 nfs_fattr_init(fattr);
1da177e4
LT
1515 return rpc_call_sync(server->client, &msg, 0);
1516}
1517
1518static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1519{
1520 struct nfs4_exception exception = { };
1521 int err;
1522 do {
1523 err = nfs4_handle_exception(server,
1524 _nfs4_proc_getattr(server, fhandle, fattr),
1525 &exception);
1526 } while (exception.retry);
1527 return err;
1528}
1529
1530/*
1531 * The file is not closed if it is opened due to the a request to change
1532 * the size of the file. The open call will not be needed once the
1533 * VFS layer lookup-intents are implemented.
1534 *
1535 * Close is called when the inode is destroyed.
1536 * If we haven't opened the file for O_WRONLY, we
1537 * need to in the size_change case to obtain a stateid.
1538 *
1539 * Got race?
1540 * Because OPEN is always done by name in nfsv4, it is
1541 * possible that we opened a different file by the same
1542 * name. We can recognize this race condition, but we
1543 * can't do anything about it besides returning an error.
1544 *
1545 * This will be fixed with VFS changes (lookup-intent).
1546 */
1547static int
1548nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1549 struct iattr *sattr)
1550{
08e9eac4
TM
1551 struct rpc_cred *cred;
1552 struct inode *inode = dentry->d_inode;
d530838b
TM
1553 struct nfs_open_context *ctx;
1554 struct nfs4_state *state = NULL;
1da177e4
LT
1555 int status;
1556
0e574af1 1557 nfs_fattr_init(fattr);
1da177e4 1558
1f163415 1559 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM
1560 if (IS_ERR(cred))
1561 return PTR_ERR(cred);
d530838b
TM
1562
1563 /* Search for an existing open(O_WRITE) file */
1564 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1565 if (ctx != NULL)
1566 state = ctx->state;
08e9eac4 1567
3e4f6290 1568 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM
1569 if (status == 0)
1570 nfs_setattr_update_inode(inode, sattr);
d530838b
TM
1571 if (ctx != NULL)
1572 put_nfs_open_context(ctx);
08e9eac4 1573 put_rpccred(cred);
1da177e4
LT
1574 return status;
1575}
1576
2b3de441
DH
1577static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1578 struct qstr *name, struct nfs_fh *fhandle,
1579 struct nfs_fattr *fattr)
1580{
1581 int status;
1582 struct nfs4_lookup_arg args = {
1583 .bitmask = server->attr_bitmask,
1584 .dir_fh = dirfh,
1585 .name = name,
1586 };
1587 struct nfs4_lookup_res res = {
1588 .server = server,
1589 .fattr = fattr,
1590 .fh = fhandle,
1591 };
1592 struct rpc_message msg = {
1593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1594 .rpc_argp = &args,
1595 .rpc_resp = &res,
1596 };
1597
1598 nfs_fattr_init(fattr);
1599
1600 dprintk("NFS call lookupfh %s\n", name->name);
1601 status = rpc_call_sync(server->client, &msg, 0);
1602 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH
1603 return status;
1604}
1605
1606static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1607 struct qstr *name, struct nfs_fh *fhandle,
1608 struct nfs_fattr *fattr)
1609{
1610 struct nfs4_exception exception = { };
1611 int err;
1612 do {
4e56e082
TM
1613 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1614 /* FIXME: !!!! */
1615 if (err == -NFS4ERR_MOVED) {
1616 err = -EREMOTE;
1617 break;
1618 }
1619 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH
1620 } while (exception.retry);
1621 return err;
1622}
1623
1da177e4
LT
1624static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1625 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1626{
4e56e082 1627 int status;
1da177e4
LT
1628
1629 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1630 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN
1631 if (status == -NFS4ERR_MOVED)
1632 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT
1633 dprintk("NFS reply lookup: %d\n", status);
1634 return status;
1635}
1636
1637static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1638{
1639 struct nfs4_exception exception = { };
1640 int err;
1641 do {
1642 err = nfs4_handle_exception(NFS_SERVER(dir),
1643 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1644 &exception);
1645 } while (exception.retry);
1646 return err;
1647}
1648
1649static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1650{
1651 struct nfs4_accessargs args = {
1652 .fh = NFS_FH(inode),
1653 };
1654 struct nfs4_accessres res = { 0 };
1655 struct rpc_message msg = {
1656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1657 .rpc_argp = &args,
1658 .rpc_resp = &res,
1659 .rpc_cred = entry->cred,
1660 };
1661 int mode = entry->mask;
1662 int status;
1663
1664 /*
1665 * Determine which access bits we want to ask for...
1666 */
1667 if (mode & MAY_READ)
1668 args.access |= NFS4_ACCESS_READ;
1669 if (S_ISDIR(inode->i_mode)) {
1670 if (mode & MAY_WRITE)
1671 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1672 if (mode & MAY_EXEC)
1673 args.access |= NFS4_ACCESS_LOOKUP;
1674 } else {
1675 if (mode & MAY_WRITE)
1676 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1677 if (mode & MAY_EXEC)
1678 args.access |= NFS4_ACCESS_EXECUTE;
1679 }
1680 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1681 if (!status) {
1682 entry->mask = 0;
1683 if (res.access & NFS4_ACCESS_READ)
1684 entry->mask |= MAY_READ;
1685 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1686 entry->mask |= MAY_WRITE;
1687 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1688 entry->mask |= MAY_EXEC;
1689 }
1690 return status;
1691}
1692
1693static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1694{
1695 struct nfs4_exception exception = { };
1696 int err;
1697 do {
1698 err = nfs4_handle_exception(NFS_SERVER(inode),
1699 _nfs4_proc_access(inode, entry),
1700 &exception);
1701 } while (exception.retry);
1702 return err;
1703}
1704
1705/*
1706 * TODO: For the time being, we don't try to get any attributes
1707 * along with any of the zero-copy operations READ, READDIR,
1708 * READLINK, WRITE.
1709 *
1710 * In the case of the first three, we want to put the GETATTR
1711 * after the read-type operation -- this is because it is hard
1712 * to predict the length of a GETATTR response in v4, and thus
1713 * align the READ data correctly. This means that the GETATTR
1714 * may end up partially falling into the page cache, and we should
1715 * shift it into the 'tail' of the xdr_buf before processing.
1716 * To do this efficiently, we need to know the total length
1717 * of data received, which doesn't seem to be available outside
1718 * of the RPC layer.
1719 *
1720 * In the case of WRITE, we also want to put the GETATTR after
1721 * the operation -- in this case because we want to make sure
1722 * we get the post-operation mtime and size. This means that
1723 * we can't use xdr_encode_pages() as written: we need a variant
1724 * of it which would leave room in the 'tail' iovec.
1725 *
1726 * Both of these changes to the XDR layer would in fact be quite
1727 * minor, but I decided to leave them for a subsequent patch.
1728 */
1729static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1730 unsigned int pgbase, unsigned int pglen)
1731{
1732 struct nfs4_readlink args = {
1733 .fh = NFS_FH(inode),
1734 .pgbase = pgbase,
1735 .pglen = pglen,
1736 .pages = &page,
1737 };
1738 struct rpc_message msg = {
1739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1740 .rpc_argp = &args,
1741 .rpc_resp = NULL,
1742 };
1743
1744 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1745}
1746
1747static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1748 unsigned int pgbase, unsigned int pglen)
1749{
1750 struct nfs4_exception exception = { };
1751 int err;
1752 do {
1753 err = nfs4_handle_exception(NFS_SERVER(inode),
1754 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1755 &exception);
1756 } while (exception.retry);
1757 return err;
1758}
1759
1da177e4
LT
1760/*
1761 * Got race?
1762 * We will need to arrange for the VFS layer to provide an atomic open.
1763 * Until then, this create/open method is prone to inefficiency and race
1764 * conditions due to the lookup, create, and open VFS calls from sys_open()
1765 * placed on the wire.
1766 *
1767 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1768 * The file will be opened again in the subsequent VFS open call
1769 * (nfs4_proc_file_open).
1770 *
1771 * The open for read will just hang around to be used by any process that
1772 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1773 */
1774
1775static int
1776nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1777 int flags, struct nameidata *nd)
1da177e4 1778{
ad389da7
TM
1779 struct path path = {
1780 .mnt = nd->mnt,
1781 .dentry = dentry,
1782 };
1da177e4
LT
1783 struct nfs4_state *state;
1784 struct rpc_cred *cred;
1785 int status = 0;
1786
1f163415 1787 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT
1788 if (IS_ERR(cred)) {
1789 status = PTR_ERR(cred);
1790 goto out;
1791 }
ad389da7 1792 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4
LT
1793 put_rpccred(cred);
1794 if (IS_ERR(state)) {
1795 status = PTR_ERR(state);
1796 goto out;
1797 }
24ac23ab 1798 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT
1799 if (flags & O_EXCL) {
1800 struct nfs_fattr fattr;
3e4f6290 1801 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1802 if (status == 0)
65e4308d 1803 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1804 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1805 }
ad389da7 1806 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1807 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1808 else
4a35bd41 1809 nfs4_close_state(&path, state, flags);
1da177e4
LT
1810out:
1811 return status;
1812}
1813
1814static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1815{
16e42959 1816 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT
1817 struct nfs4_remove_arg args = {
1818 .fh = NFS_FH(dir),
1819 .name = name,
16e42959
TM
1820 .bitmask = server->attr_bitmask,
1821 };
1822 struct nfs_fattr dir_attr;
1823 struct nfs4_remove_res res = {
1824 .server = server,
1825 .dir_attr = &dir_attr,
1da177e4 1826 };
1da177e4
LT
1827 struct rpc_message msg = {
1828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1829 .rpc_argp = &args,
1830 .rpc_resp = &res,
1831 };
1832 int status;
1833
16e42959
TM
1834 nfs_fattr_init(res.dir_attr);
1835 status = rpc_call_sync(server->client, &msg, 0);
1836 if (status == 0) {
1837 update_changeattr(dir, &res.cinfo);
1838 nfs_post_op_update_inode(dir, res.dir_attr);
1839 }
1da177e4
LT
1840 return status;
1841}
1842
1843static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1844{
1845 struct nfs4_exception exception = { };
1846 int err;
1847 do {
1848 err = nfs4_handle_exception(NFS_SERVER(dir),
1849 _nfs4_proc_remove(dir, name),
1850 &exception);
1851 } while (exception.retry);
1852 return err;
1853}
1854
1855struct unlink_desc {
1856 struct nfs4_remove_arg args;
16e42959
TM
1857 struct nfs4_remove_res res;
1858 struct nfs_fattr dir_attr;
1da177e4
LT
1859};
1860
1861static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1862 struct qstr *name)
1863{
16e42959 1864 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1da177e4
LT
1865 struct unlink_desc *up;
1866
5cbded58 1867 up = kmalloc(sizeof(*up), GFP_KERNEL);
1da177e4
LT
1868 if (!up)
1869 return -ENOMEM;
1870
1871 up->args.fh = NFS_FH(dir->d_inode);
1872 up->args.name = name;
16e42959
TM
1873 up->args.bitmask = server->attr_bitmask;
1874 up->res.server = server;
1875 up->res.dir_attr = &up->dir_attr;
1da177e4
LT
1876
1877 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1878 msg->rpc_argp = &up->args;
1879 msg->rpc_resp = &up->res;
1880 return 0;
1881}
1882
1883static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1884{
1885 struct rpc_message *msg = &task->tk_msg;
1886 struct unlink_desc *up;
1887
1888 if (msg->rpc_resp != NULL) {
1889 up = container_of(msg->rpc_resp, struct unlink_desc, res);
16e42959
TM
1890 update_changeattr(dir->d_inode, &up->res.cinfo);
1891 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1da177e4
LT
1892 kfree(up);
1893 msg->rpc_resp = NULL;
1894 msg->rpc_argp = NULL;
1895 }
1896 return 0;
1897}
1898
1899static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1900 struct inode *new_dir, struct qstr *new_name)
1901{
6caf2c82 1902 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT
1903 struct nfs4_rename_arg arg = {
1904 .old_dir = NFS_FH(old_dir),
1905 .new_dir = NFS_FH(new_dir),
1906 .old_name = old_name,
1907 .new_name = new_name,
6caf2c82
TM
1908 .bitmask = server->attr_bitmask,
1909 };
1910 struct nfs_fattr old_fattr, new_fattr;
1911 struct nfs4_rename_res res = {
1912 .server = server,
1913 .old_fattr = &old_fattr,
1914 .new_fattr = &new_fattr,
1da177e4 1915 };
1da177e4
LT
1916 struct rpc_message msg = {
1917 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1918 .rpc_argp = &arg,
1919 .rpc_resp = &res,
1920 };
1921 int status;
1922
6caf2c82
TM
1923 nfs_fattr_init(res.old_fattr);
1924 nfs_fattr_init(res.new_fattr);
1925 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT
1926
1927 if (!status) {
1928 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 1929 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 1930 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 1931 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT
1932 }
1933 return status;
1934}
1935
1936static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1937 struct inode *new_dir, struct qstr *new_name)
1938{
1939 struct nfs4_exception exception = { };
1940 int err;
1941 do {
1942 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1943 _nfs4_proc_rename(old_dir, old_name,
1944 new_dir, new_name),
1945 &exception);
1946 } while (exception.retry);
1947 return err;
1948}
1949
1950static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1951{
91ba2eee 1952 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT
1953 struct nfs4_link_arg arg = {
1954 .fh = NFS_FH(inode),
1955 .dir_fh = NFS_FH(dir),
1956 .name = name,
91ba2eee
TM
1957 .bitmask = server->attr_bitmask,
1958 };
1959 struct nfs_fattr fattr, dir_attr;
1960 struct nfs4_link_res res = {
1961 .server = server,
1962 .fattr = &fattr,
1963 .dir_attr = &dir_attr,
1da177e4 1964 };
1da177e4
LT
1965 struct rpc_message msg = {
1966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1967 .rpc_argp = &arg,
91ba2eee 1968 .rpc_resp = &res,
1da177e4
LT
1969 };
1970 int status;
1971
91ba2eee
TM
1972 nfs_fattr_init(res.fattr);
1973 nfs_fattr_init(res.dir_attr);
1974 status = rpc_call_sync(server->client, &msg, 0);
1975 if (!status) {
1976 update_changeattr(dir, &res.cinfo);
1977 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 1978 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 1979 }
1da177e4
LT
1980
1981 return status;
1982}
1983
1984static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1985{
1986 struct nfs4_exception exception = { };
1987 int err;
1988 do {
1989 err = nfs4_handle_exception(NFS_SERVER(inode),
1990 _nfs4_proc_link(inode, dir, name),
1991 &exception);
1992 } while (exception.retry);
1993 return err;
1994}
1995
4f390c15 1996static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 1997 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT
1998{
1999 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL
2000 struct nfs_fh fhandle;
2001 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT
2002 struct nfs4_create_arg arg = {
2003 .dir_fh = NFS_FH(dir),
2004 .server = server,
4f390c15 2005 .name = &dentry->d_name,
1da177e4
LT
2006 .attrs = sattr,
2007 .ftype = NF4LNK,
2008 .bitmask = server->attr_bitmask,
2009 };
2010 struct nfs4_create_res res = {
2011 .server = server,
4f390c15
CL
2012 .fh = &fhandle,
2013 .fattr = &fattr,
56ae19f3 2014 .dir_fattr = &dir_fattr,
1da177e4
LT
2015 };
2016 struct rpc_message msg = {
2017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2018 .rpc_argp = &arg,
2019 .rpc_resp = &res,
2020 };
2021 int status;
2022
94a6d753 2023 if (len > NFS4_MAXPATHLEN)
1da177e4 2024 return -ENAMETOOLONG;
4f390c15 2025
94a6d753
CL
2026 arg.u.symlink.pages = &page;
2027 arg.u.symlink.len = len;
4f390c15 2028 nfs_fattr_init(&fattr);
56ae19f3 2029 nfs_fattr_init(&dir_fattr);
1da177e4
LT
2030
2031 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2032 if (!status) {
1da177e4 2033 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL
2034 nfs_post_op_update_inode(dir, res.dir_fattr);
2035 status = nfs_instantiate(dentry, &fhandle, &fattr);
2036 }
1da177e4
LT
2037 return status;
2038}
2039
4f390c15 2040static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2041 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT
2042{
2043 struct nfs4_exception exception = { };
2044 int err;
2045 do {
2046 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL
2047 _nfs4_proc_symlink(dir, dentry, page,
2048 len, sattr),
1da177e4
LT
2049 &exception);
2050 } while (exception.retry);
2051 return err;
2052}
2053
2054static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2055 struct iattr *sattr)
2056{
2057 struct nfs_server *server = NFS_SERVER(dir);
2058 struct nfs_fh fhandle;
56ae19f3 2059 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT
2060 struct nfs4_create_arg arg = {
2061 .dir_fh = NFS_FH(dir),
2062 .server = server,
2063 .name = &dentry->d_name,
2064 .attrs = sattr,
2065 .ftype = NF4DIR,
2066 .bitmask = server->attr_bitmask,
2067 };
2068 struct nfs4_create_res res = {
2069 .server = server,
2070 .fh = &fhandle,
2071 .fattr = &fattr,
56ae19f3 2072 .dir_fattr = &dir_fattr,
1da177e4
LT
2073 };
2074 struct rpc_message msg = {
2075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2076 .rpc_argp = &arg,
2077 .rpc_resp = &res,
2078 };
2079 int status;
2080
0e574af1 2081 nfs_fattr_init(&fattr);
56ae19f3 2082 nfs_fattr_init(&dir_fattr);
1da177e4
LT
2083
2084 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2085 if (!status) {
2086 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2087 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT
2088 status = nfs_instantiate(dentry, &fhandle, &fattr);
2089 }
2090 return status;
2091}
2092
2093static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2094 struct iattr *sattr)
2095{
2096 struct nfs4_exception exception = { };
2097 int err;
2098 do {
2099 err = nfs4_handle_exception(NFS_SERVER(dir),
2100 _nfs4_proc_mkdir(dir, dentry, sattr),
2101 &exception);
2102 } while (exception.retry);
2103 return err;
2104}
2105
2106static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2107 u64 cookie, struct page *page, unsigned int count, int plus)
2108{
2109 struct inode *dir = dentry->d_inode;
2110 struct nfs4_readdir_arg args = {
2111 .fh = NFS_FH(dir),
2112 .pages = &page,
2113 .pgbase = 0,
2114 .count = count,
2115 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2116 };
2117 struct nfs4_readdir_res res;
2118 struct rpc_message msg = {
2119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2120 .rpc_argp = &args,
2121 .rpc_resp = &res,
2122 .rpc_cred = cred,
2123 };
2124 int status;
2125
eadf4598
TM
2126 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2127 dentry->d_parent->d_name.name,
2128 dentry->d_name.name,
2129 (unsigned long long)cookie);
1da177e4
LT
2130 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2131 res.pgbase = args.pgbase;
2132 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2133 if (status == 0)
2134 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
eadf4598 2135 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT
2136 return status;
2137}
2138
2139static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2140 u64 cookie, struct page *page, unsigned int count, int plus)
2141{
2142 struct nfs4_exception exception = { };
2143 int err;
2144 do {
2145 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2146 _nfs4_proc_readdir(dentry, cred, cookie,
2147 page, count, plus),
2148 &exception);
2149 } while (exception.retry);
2150 return err;
2151}
2152
2153static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2154 struct iattr *sattr, dev_t rdev)
2155{
2156 struct nfs_server *server = NFS_SERVER(dir);
2157 struct nfs_fh fh;
56ae19f3 2158 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT
2159 struct nfs4_create_arg arg = {
2160 .dir_fh = NFS_FH(dir),
2161 .server = server,
2162 .name = &dentry->d_name,
2163 .attrs = sattr,
2164 .bitmask = server->attr_bitmask,
2165 };
2166 struct nfs4_create_res res = {
2167 .server = server,
2168 .fh = &fh,
2169 .fattr = &fattr,
56ae19f3 2170 .dir_fattr = &dir_fattr,
1da177e4
LT
2171 };
2172 struct rpc_message msg = {
2173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2174 .rpc_argp = &arg,
2175 .rpc_resp = &res,
2176 };
2177 int status;
2178 int mode = sattr->ia_mode;
2179
0e574af1 2180 nfs_fattr_init(&fattr);
56ae19f3 2181 nfs_fattr_init(&dir_fattr);
1da177e4
LT
2182
2183 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2184 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2185 if (S_ISFIFO(mode))
2186 arg.ftype = NF4FIFO;
2187 else if (S_ISBLK(mode)) {
2188 arg.ftype = NF4BLK;
2189 arg.u.device.specdata1 = MAJOR(rdev);
2190 arg.u.device.specdata2 = MINOR(rdev);
2191 }
2192 else if (S_ISCHR(mode)) {
2193 arg.ftype = NF4CHR;
2194 arg.u.device.specdata1 = MAJOR(rdev);
2195 arg.u.device.specdata2 = MINOR(rdev);
2196 }
2197 else
2198 arg.ftype = NF4SOCK;
2199
2200 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2201 if (status == 0) {
2202 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2203 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT
2204 status = nfs_instantiate(dentry, &fh, &fattr);
2205 }
2206 return status;
2207}
2208
2209static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2210 struct iattr *sattr, dev_t rdev)
2211{
2212 struct nfs4_exception exception = { };
2213 int err;
2214 do {
2215 err = nfs4_handle_exception(NFS_SERVER(dir),
2216 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2217 &exception);
2218 } while (exception.retry);
2219 return err;
2220}
2221
2222static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2223 struct nfs_fsstat *fsstat)
2224{
2225 struct nfs4_statfs_arg args = {
2226 .fh = fhandle,
2227 .bitmask = server->attr_bitmask,
2228 };
2229 struct rpc_message msg = {
2230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2231 .rpc_argp = &args,
2232 .rpc_resp = fsstat,
2233 };
2234
0e574af1 2235 nfs_fattr_init(fsstat->fattr);
1da177e4
LT
2236 return rpc_call_sync(server->client, &msg, 0);
2237}
2238
2239static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2240{
2241 struct nfs4_exception exception = { };
2242 int err;
2243 do {
2244 err = nfs4_handle_exception(server,
2245 _nfs4_proc_statfs(server, fhandle, fsstat),
2246 &exception);
2247 } while (exception.retry);
2248 return err;
2249}
2250
2251static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2252 struct nfs_fsinfo *fsinfo)
2253{
2254 struct nfs4_fsinfo_arg args = {
2255 .fh = fhandle,
2256 .bitmask = server->attr_bitmask,
2257 };
2258 struct rpc_message msg = {
2259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2260 .rpc_argp = &args,
2261 .rpc_resp = fsinfo,
2262 };
2263
2264 return rpc_call_sync(server->client, &msg, 0);
2265}
2266
2267static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2268{
2269 struct nfs4_exception exception = { };
2270 int err;
2271
2272 do {
2273 err = nfs4_handle_exception(server,
2274 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2275 &exception);
2276 } while (exception.retry);
2277 return err;
2278}
2279
2280static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2281{
0e574af1 2282 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT
2283 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2284}
2285
2286static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2287 struct nfs_pathconf *pathconf)
2288{
2289 struct nfs4_pathconf_arg args = {
2290 .fh = fhandle,
2291 .bitmask = server->attr_bitmask,
2292 };
2293 struct rpc_message msg = {
2294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2295 .rpc_argp = &args,
2296 .rpc_resp = pathconf,
2297 };
2298
2299 /* None of the pathconf attributes are mandatory to implement */
2300 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2301 memset(pathconf, 0, sizeof(*pathconf));
2302 return 0;
2303 }
2304
0e574af1 2305 nfs_fattr_init(pathconf->fattr);
1da177e4
LT
2306 return rpc_call_sync(server->client, &msg, 0);
2307}
2308
2309static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2310 struct nfs_pathconf *pathconf)
2311{
2312 struct nfs4_exception exception = { };
2313 int err;
2314
2315 do {
2316 err = nfs4_handle_exception(server,
2317 _nfs4_proc_pathconf(server, fhandle, pathconf),
2318 &exception);
2319 } while (exception.retry);
2320 return err;
2321}
2322
ec06c096 2323static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2324{
ec06c096 2325 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2326
ec06c096 2327 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2328 rpc_restart_call(task);
ec06c096 2329 return -EAGAIN;
1da177e4
LT
2330 }
2331 if (task->tk_status > 0)
ec06c096
TM
2332 renew_lease(server, data->timestamp);
2333 return 0;
1da177e4
LT
2334}
2335
ec06c096 2336static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2337{
1da177e4
LT
2338 struct rpc_message msg = {
2339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2340 .rpc_argp = &data->args,
2341 .rpc_resp = &data->res,
2342 .rpc_cred = data->cred,
2343 };
1da177e4
LT
2344
2345 data->timestamp = jiffies;
2346
ec06c096 2347 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT
2348}
2349
788e7a89 2350static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2351{
1da177e4
LT
2352 struct inode *inode = data->inode;
2353
2354 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2355 rpc_restart_call(task);
788e7a89 2356 return -EAGAIN;
1da177e4 2357 }
4f9838c7 2358 if (task->tk_status >= 0) {
1da177e4 2359 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM
2360 nfs_post_op_update_inode(inode, data->res.fattr);
2361 }
788e7a89 2362 return 0;
1da177e4
LT
2363}
2364
788e7a89 2365static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2366{
1da177e4
LT
2367 struct rpc_message msg = {
2368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2369 .rpc_argp = &data->args,
2370 .rpc_resp = &data->res,
2371 .rpc_cred = data->cred,
2372 };
2373 struct inode *inode = data->inode;
4f9838c7 2374 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2375 int stable;
1da177e4
LT
2376
2377 if (how & FLUSH_STABLE) {
2378 if (!NFS_I(inode)->ncommit)
2379 stable = NFS_FILE_SYNC;
2380 else
2381 stable = NFS_DATA_SYNC;
2382 } else
2383 stable = NFS_UNSTABLE;
2384 data->args.stable = stable;
4f9838c7
TM
2385 data->args.bitmask = server->attr_bitmask;
2386 data->res.server = server;
1da177e4
LT
2387
2388 data->timestamp = jiffies;
2389
1da177e4 2390 /* Finalize the task. */
788e7a89 2391 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT
2392}
2393
788e7a89 2394static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2395{
1da177e4
LT
2396 struct inode *inode = data->inode;
2397
2398 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2399 rpc_restart_call(task);
788e7a89 2400 return -EAGAIN;
1da177e4 2401 }
4f9838c7
TM
2402 if (task->tk_status >= 0)
2403 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2404 return 0;
1da177e4
LT
2405}
2406
788e7a89 2407static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2408{
1da177e4
LT
2409 struct rpc_message msg = {
2410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2411 .rpc_argp = &data->args,
2412 .rpc_resp = &data->res,
2413 .rpc_cred = data->cred,
2414 };
788e7a89 2415 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2416
4f9838c7
TM
2417 data->args.bitmask = server->attr_bitmask;
2418 data->res.server = server;
2419
788e7a89 2420 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT
2421}
2422
2423/*
2424 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2425 * standalone procedure for queueing an asynchronous RENEW.
2426 */
963d8fe5 2427static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2428{
adfa6f98 2429 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2430 unsigned long timestamp = (unsigned long)data;
1da177e4
LT
2431
2432 if (task->tk_status < 0) {
2433 switch (task->tk_status) {
2434 case -NFS4ERR_STALE_CLIENTID:
2435 case -NFS4ERR_EXPIRED:
2436 case -NFS4ERR_CB_PATH_DOWN:
2437 nfs4_schedule_state_recovery(clp);
2438 }
2439 return;
2440 }
2441 spin_lock(&clp->cl_lock);
2442 if (time_before(clp->cl_last_renewal,timestamp))
2443 clp->cl_last_renewal = timestamp;
2444 spin_unlock(&clp->cl_lock);
2445}
2446
963d8fe5
TM
2447static const struct rpc_call_ops nfs4_renew_ops = {
2448 .rpc_call_done = nfs4_renew_done,
2449};
2450
adfa6f98 2451int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT
2452{
2453 struct rpc_message msg = {
2454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2455 .rpc_argp = clp,
b4454fe1 2456 .rpc_cred = cred,
1da177e4
LT
2457 };
2458
2459 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2460 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT
2461}
2462
adfa6f98 2463int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT
2464{
2465 struct rpc_message msg = {
2466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2467 .rpc_argp = clp,
b4454fe1 2468 .rpc_cred = cred,
1da177e4
LT
2469 };
2470 unsigned long now = jiffies;
2471 int status;
2472
2473 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2474 if (status < 0)
2475 return status;
2476 spin_lock(&clp->cl_lock);
2477 if (time_before(clp->cl_last_renewal,now))
2478 clp->cl_last_renewal = now;
2479 spin_unlock(&clp->cl_lock);
2480 return 0;
2481}
2482
aa1870af
BF
2483static inline int nfs4_server_supports_acls(struct nfs_server *server)
2484{
2485 return (server->caps & NFS_CAP_ACLS)
2486 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2487 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2488}
2489
2490/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2491 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2492 * the stack.
2493 */
2494#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2495
2496static void buf_to_pages(const void *buf, size_t buflen,
2497 struct page **pages, unsigned int *pgbase)
2498{
2499 const void *p = buf;
2500
2501 *pgbase = offset_in_page(buf);
2502 p -= *pgbase;
2503 while (p < buf + buflen) {
2504 *(pages++) = virt_to_page(p);
2505 p += PAGE_CACHE_SIZE;
2506 }
2507}
2508
e50a1c2e
BF
2509struct nfs4_cached_acl {
2510 int cached;
2511 size_t len;
3e9d4154 2512 char data[0];
e50a1c2e
BF
2513};
2514
2515static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2516{
2517 struct nfs_inode *nfsi = NFS_I(inode);
2518
2519 spin_lock(&inode->i_lock);
2520 kfree(nfsi->nfs4_acl);
2521 nfsi->nfs4_acl = acl;
2522 spin_unlock(&inode->i_lock);
2523}
2524
2525static void nfs4_zap_acl_attr(struct inode *inode)
2526{
2527 nfs4_set_cached_acl(inode, NULL);
2528}
2529
2530static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2531{
2532 struct nfs_inode *nfsi = NFS_I(inode);
2533 struct nfs4_cached_acl *acl;
2534 int ret = -ENOENT;
2535
2536 spin_lock(&inode->i_lock);
2537 acl = nfsi->nfs4_acl;
2538 if (acl == NULL)
2539 goto out;
2540 if (buf == NULL) /* user is just asking for length */
2541 goto out_len;
2542 if (acl->cached == 0)
2543 goto out;
2544 ret = -ERANGE; /* see getxattr(2) man page */
2545 if (acl->len > buflen)
2546 goto out;
2547 memcpy(buf, acl->data, acl->len);
2548out_len:
2549 ret = acl->len;
2550out:
2551 spin_unlock(&inode->i_lock);
2552 return ret;
2553}
2554
2555static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2556{
2557 struct nfs4_cached_acl *acl;
2558
2559 if (buf && acl_len <= PAGE_SIZE) {
2560 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2561 if (acl == NULL)
2562 goto out;
2563 acl->cached = 1;
2564 memcpy(acl->data, buf, acl_len);
2565 } else {
2566 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2567 if (acl == NULL)
2568 goto out;
2569 acl->cached = 0;
2570 }
2571 acl->len = acl_len;
2572out:
2573 nfs4_set_cached_acl(inode, acl);
2574}
2575
16b4289c 2576static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2577{
aa1870af
BF
2578 struct page *pages[NFS4ACL_MAXPAGES];
2579 struct nfs_getaclargs args = {
2580 .fh = NFS_FH(inode),
2581 .acl_pages = pages,
2582 .acl_len = buflen,
2583 };
2584 size_t resp_len = buflen;
e50a1c2e 2585 void *resp_buf;
aa1870af
BF
2586 struct rpc_message msg = {
2587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2588 .rpc_argp = &args,
2589 .rpc_resp = &resp_len,
2590 };
e50a1c2e 2591 struct page *localpage = NULL;
aa1870af
BF
2592 int ret;
2593
e50a1c2e
BF
2594 if (buflen < PAGE_SIZE) {
2595 /* As long as we're doing a round trip to the server anyway,
2596 * let's be prepared for a page of acl data. */
2597 localpage = alloc_page(GFP_KERNEL);
2598 resp_buf = page_address(localpage);
2599 if (localpage == NULL)
2600 return -ENOMEM;
2601 args.acl_pages[0] = localpage;
2602 args.acl_pgbase = 0;
1d95db8e 2603 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF
2604 } else {
2605 resp_buf = buf;
2606 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2607 }
aa1870af 2608 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF
2609 if (ret)
2610 goto out_free;
2611 if (resp_len > args.acl_len)
2612 nfs4_write_cached_acl(inode, NULL, resp_len);
2613 else
2614 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2615 if (buf) {
2616 ret = -ERANGE;
2617 if (resp_len > buflen)
2618 goto out_free;
2619 if (localpage)
2620 memcpy(buf, resp_buf, resp_len);
2621 }
2622 ret = resp_len;
2623out_free:
2624 if (localpage)
2625 __free_page(localpage);
aa1870af
BF
2626 return ret;
2627}
2628
16b4289c
TM
2629static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2630{
2631 struct nfs4_exception exception = { };
2632 ssize_t ret;
2633 do {
2634 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2635 if (ret >= 0)
2636 break;
2637 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2638 } while (exception.retry);
2639 return ret;
2640}
2641
e50a1c2e
BF
2642static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2643{
2644 struct nfs_server *server = NFS_SERVER(inode);
2645 int ret;
2646
2647 if (!nfs4_server_supports_acls(server))
2648 return -EOPNOTSUPP;
2649 ret = nfs_revalidate_inode(server, inode);
2650 if (ret < 0)
2651 return ret;
2652 ret = nfs4_read_cached_acl(inode, buf, buflen);
2653 if (ret != -ENOENT)
2654 return ret;
2655 return nfs4_get_acl_uncached(inode, buf, buflen);
2656}
2657
16b4289c 2658static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF
2659{
2660 struct nfs_server *server = NFS_SERVER(inode);
2661 struct page *pages[NFS4ACL_MAXPAGES];
2662 struct nfs_setaclargs arg = {
2663 .fh = NFS_FH(inode),
2664 .acl_pages = pages,
2665 .acl_len = buflen,
2666 };
2667 struct rpc_message msg = {
2668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2669 .rpc_argp = &arg,
2670 .rpc_resp = NULL,
2671 };
2672 int ret;
2673
2674 if (!nfs4_server_supports_acls(server))
2675 return -EOPNOTSUPP;
642ac549 2676 nfs_inode_return_delegation(inode);
4b580ee3 2677 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2678 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2679 nfs_zap_caches(inode);
4b580ee3
BF
2680 return ret;
2681}
2682
16b4289c
TM
2683static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2684{
2685 struct nfs4_exception exception = { };
2686 int err;
2687 do {
2688 err = nfs4_handle_exception(NFS_SERVER(inode),
2689 __nfs4_proc_set_acl(inode, buf, buflen),
2690 &exception);
2691 } while (exception.retry);
2692 return err;
2693}
2694
1da177e4 2695static int
faf5f49c 2696nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2697{
7539bbab 2698 struct nfs_client *clp = server->nfs_client;
1da177e4
LT
2699
2700 if (!clp || task->tk_status >= 0)
2701 return 0;
2702 switch(task->tk_status) {
2703 case -NFS4ERR_STALE_CLIENTID:
2704 case -NFS4ERR_STALE_STATEID:
2705 case -NFS4ERR_EXPIRED:
2706 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2707 nfs4_schedule_state_recovery(clp);
433fbe4c 2708 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT
2709 rpc_wake_up_task(task);
2710 task->tk_status = 0;
2711 return -EAGAIN;
1da177e4 2712 case -NFS4ERR_DELAY:
006ea73e
CL
2713 nfs_inc_server_stats((struct nfs_server *) server,
2714 NFSIOS_DELAY);
2715 case -NFS4ERR_GRACE:
1da177e4
LT
2716 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2717 task->tk_status = 0;
2718 return -EAGAIN;
2719 case -NFS4ERR_OLD_STATEID:
2720 task->tk_status = 0;
2721 return -EAGAIN;
2722 }
2723 task->tk_status = nfs4_map_errors(task->tk_status);
2724 return 0;
2725}
2726
433fbe4c
TM
2727static int nfs4_wait_bit_interruptible(void *word)
2728{
2729 if (signal_pending(current))
2730 return -ERESTARTSYS;
2731 schedule();
2732 return 0;
2733}
2734
adfa6f98 2735static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2736{
1da177e4 2737 sigset_t oldset;
433fbe4c 2738 int res;
1da177e4
LT
2739
2740 might_sleep();
2741
e148582e
TM
2742 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2743
1da177e4 2744 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM
2745 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2746 nfs4_wait_bit_interruptible,
2747 TASK_INTERRUPTIBLE);
1da177e4 2748 rpc_clnt_sigunmask(clnt, &oldset);
e148582e
TM
2749
2750 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT
2751 return res;
2752}
2753
2754static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2755{
2756 sigset_t oldset;
2757 int res = 0;
2758
2759 might_sleep();
2760
2761 if (*timeout <= 0)
2762 *timeout = NFS4_POLL_RETRY_MIN;
2763 if (*timeout > NFS4_POLL_RETRY_MAX)
2764 *timeout = NFS4_POLL_RETRY_MAX;
2765 rpc_clnt_sigmask(clnt, &oldset);
2766 if (clnt->cl_intr) {
041e0e3b 2767 schedule_timeout_interruptible(*timeout);
1da177e4
LT
2768 if (signalled())
2769 res = -ERESTARTSYS;
041e0e3b
NA
2770 } else
2771 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT
2772 rpc_clnt_sigunmask(clnt, &oldset);
2773 *timeout <<= 1;
2774 return res;
2775}
2776
2777/* This is the error handling routine for processes that are allowed
2778 * to sleep.
2779 */
10afec90 2780static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2781{
7539bbab 2782 struct nfs_client *clp = server->nfs_client;
1da177e4
LT
2783 int ret = errorcode;
2784
2785 exception->retry = 0;
2786 switch(errorcode) {
2787 case 0:
2788 return 0;
2789 case -NFS4ERR_STALE_CLIENTID:
2790 case -NFS4ERR_STALE_STATEID:
2791 case -NFS4ERR_EXPIRED:
433fbe4c 2792 nfs4_schedule_state_recovery(clp);
1da177e4
LT
2793 ret = nfs4_wait_clnt_recover(server->client, clp);
2794 if (ret == 0)
2795 exception->retry = 1;
2796 break;
c514983d 2797 case -NFS4ERR_FILE_OPEN:
1da177e4
LT
2798 case -NFS4ERR_GRACE:
2799 case -NFS4ERR_DELAY:
2800 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM
2801 if (ret != 0)
2802 break;
1da177e4 2803 case -NFS4ERR_OLD_STATEID:
2c56617d 2804 exception->retry = 1;
1da177e4
LT
2805 }
2806 /* We failed to handle the error */
2807 return nfs4_map_errors(ret);
2808}
2809
adfa6f98 2810int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT
2811{
2812 nfs4_verifier sc_verifier;
2813 struct nfs4_setclientid setclientid = {
2814 .sc_verifier = &sc_verifier,
2815 .sc_prog = program,
2816 };
2817 struct rpc_message msg = {
2818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2819 .rpc_argp = &setclientid,
2820 .rpc_resp = clp,
286d7d6a 2821 .rpc_cred = cred,
1da177e4 2822 };
bc4785cd 2823 __be32 *p;
1da177e4
LT
2824 int loop = 0;
2825 int status;
2826
bc4785cd 2827 p = (__be32*)sc_verifier.data;
1da177e4
LT
2828 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2829 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2830
2831 for(;;) {
2832 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2833 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
24c8dbbb 2834 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
286d7d6a 2835 cred->cr_ops->cr_name,
1da177e4
LT
2836 clp->cl_id_uniquifier);
2837 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2838 sizeof(setclientid.sc_netid), "tcp");
2839 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2840 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2841 clp->cl_ipaddr, port >> 8, port & 255);
2842
2843 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2844 if (status != -NFS4ERR_CLID_INUSE)
2845 break;
2846 if (signalled())
2847 break;
2848 if (loop++ & 1)
2849 ssleep(clp->cl_lease_time + 1);
2850 else
2851 if (++clp->cl_id_uniquifier == 0)
2852 break;
2853 }
2854 return status;
2855}
2856
adfa6f98 2857static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT
2858{
2859 struct nfs_fsinfo fsinfo;
2860 struct rpc_message msg = {
2861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2862 .rpc_argp = clp,
2863 .rpc_resp = &fsinfo,
286d7d6a 2864 .rpc_cred = cred,
1da177e4
LT
2865 };
2866 unsigned long now;
2867 int status;
2868
2869 now = jiffies;
2870 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2871 if (status == 0) {
2872 spin_lock(&clp->cl_lock);
2873 clp->cl_lease_time = fsinfo.lease_time * HZ;
2874 clp->cl_last_renewal = now;
58d9714a 2875 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT
2876 spin_unlock(&clp->cl_lock);
2877 }
2878 return status;
2879}
2880
adfa6f98 2881int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM
2882{
2883 long timeout;
2884 int err;
2885 do {
2886 err = _nfs4_proc_setclientid_confirm(clp, cred);
2887 switch (err) {
2888 case 0:
2889 return err;
2890 case -NFS4ERR_RESOURCE:
2891 /* The IBM lawyers misread another document! */
2892 case -NFS4ERR_DELAY:
2893 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2894 }
2895 } while (err == 0);
2896 return err;
2897}
2898
fe650407
TM
2899struct nfs4_delegreturndata {
2900 struct nfs4_delegreturnargs args;
fa178f29 2901 struct nfs4_delegreturnres res;
fe650407
TM
2902 struct nfs_fh fh;
2903 nfs4_stateid stateid;
2904 struct rpc_cred *cred;
26e976a8 2905 unsigned long timestamp;
fa178f29 2906 struct nfs_fattr fattr;
fe650407
TM
2907 int rpc_status;
2908};
2909
2910static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2911{
fe650407 2912 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT
2913 struct rpc_message msg = {
2914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 2915 .rpc_argp = &data->args,
fa178f29 2916 .rpc_resp = &data->res,
fe650407 2917 .rpc_cred = data->cred,
1da177e4 2918 };
fa178f29 2919 nfs_fattr_init(data->res.fattr);
fe650407
TM
2920 rpc_call_setup(task, &msg, 0);
2921}
1da177e4 2922
fe650407
TM
2923static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2924{
2925 struct nfs4_delegreturndata *data = calldata;
2926 data->rpc_status = task->tk_status;
26e976a8 2927 if (data->rpc_status == 0)
fa178f29 2928 renew_lease(data->res.server, data->timestamp);
fe650407
TM
2929}
2930
2931static void nfs4_delegreturn_release(void *calldata)
2932{
2933 struct nfs4_delegreturndata *data = calldata;
2934
2935 put_rpccred(data->cred);
2936 kfree(calldata);
2937}
2938
c8d149f3 2939static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM
2940 .rpc_call_prepare = nfs4_delegreturn_prepare,
2941 .rpc_call_done = nfs4_delegreturn_done,
2942 .rpc_release = nfs4_delegreturn_release,
2943};
2944
2945static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2946{
2947 struct nfs4_delegreturndata *data;
fa178f29 2948 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM
2949 struct rpc_task *task;
2950 int status;
2951
2952 data = kmalloc(sizeof(*data), GFP_KERNEL);
2953 if (data == NULL)
2954 return -ENOMEM;
2955 data->args.fhandle = &data->fh;
2956 data->args.stateid = &data->stateid;
fa178f29 2957 data->args.bitmask = server->attr_bitmask;
fe650407
TM
2958 nfs_copy_fh(&data->fh, NFS_FH(inode));
2959 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM
2960 data->res.fattr = &data->fattr;
2961 data->res.server = server;
fe650407 2962 data->cred = get_rpccred(cred);
26e976a8 2963 data->timestamp = jiffies;
fe650407
TM
2964 data->rpc_status = 0;
2965
2966 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 2967 if (IS_ERR(task))
fe650407 2968 return PTR_ERR(task);
fe650407 2969 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 2970 if (status == 0) {
fe650407 2971 status = data->rpc_status;
fa178f29
TM
2972 if (status == 0)
2973 nfs_post_op_update_inode(inode, &data->fattr);
2974 }
e6b3c4db 2975 rpc_put_task(task);
fe650407 2976 return status;
1da177e4
LT
2977}
2978
2979int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2980{
2981 struct nfs_server *server = NFS_SERVER(inode);
2982 struct nfs4_exception exception = { };
2983 int err;
2984 do {
2985 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2986 switch (err) {
2987 case -NFS4ERR_STALE_STATEID:
2988 case -NFS4ERR_EXPIRED:
1da177e4
LT
2989 case 0:
2990 return 0;
2991 }
2992 err = nfs4_handle_exception(server, err, &exception);
2993 } while (exception.retry);
2994 return err;
2995}
2996
2997#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2998#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2999
3000/*
3001 * sleep, with exponential backoff, and retry the LOCK operation.
3002 */
3003static unsigned long
3004nfs4_set_lock_task_retry(unsigned long timeout)
3005{
041e0e3b 3006 schedule_timeout_interruptible(timeout);
1da177e4
LT
3007 timeout <<= 1;
3008 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3009 return NFS4_LOCK_MAXTIMEOUT;
3010 return timeout;
3011}
3012
1da177e4
LT
3013static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3014{
3015 struct inode *inode = state->inode;
3016 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3017 struct nfs_client *clp = server->nfs_client;
911d1aaf 3018 struct nfs_lockt_args arg = {
1da177e4 3019 .fh = NFS_FH(inode),
911d1aaf 3020 .fl = request,
1da177e4 3021 };
911d1aaf
TM
3022 struct nfs_lockt_res res = {
3023 .denied = request,
1da177e4
LT
3024 };
3025 struct rpc_message msg = {
3026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3027 .rpc_argp = &arg,
3028 .rpc_resp = &res,
3029 .rpc_cred = state->owner->so_cred,
3030 };
1da177e4
LT
3031 struct nfs4_lock_state *lsp;
3032 int status;
3033
3034 down_read(&clp->cl_sem);
911d1aaf 3035 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM
3036 status = nfs4_set_lock_state(state, request);
3037 if (status != 0)
3038 goto out;
3039 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3040 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3041 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM
3042 switch (status) {
3043 case 0:
3044 request->fl_type = F_UNLCK;
3045 break;
3046 case -NFS4ERR_DENIED:
3047 status = 0;
1da177e4 3048 }
70cc6487 3049 request->fl_ops->fl_release_private(request);
8d0a8a9d 3050out:
1da177e4
LT
3051 up_read(&clp->cl_sem);
3052 return status;
3053}
3054
3055static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3056{
3057 struct nfs4_exception exception = { };
3058 int err;
3059
3060 do {
3061 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3062 _nfs4_proc_getlk(state, cmd, request),
3063 &exception);
3064 } while (exception.retry);
3065 return err;
3066}
3067
3068static int do_vfs_lock(struct file *file, struct file_lock *fl)
3069{
3070 int res = 0;
3071 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3072 case FL_POSIX:
3073 res = posix_lock_file_wait(file, fl);
3074 break;
3075 case FL_FLOCK:
3076 res = flock_lock_file_wait(file, fl);
3077 break;
3078 default:
3079 BUG();
3080 }
1da177e4
LT
3081 return res;
3082}
3083
faf5f49c 3084struct nfs4_unlockdata {
911d1aaf
TM
3085 struct nfs_locku_args arg;
3086 struct nfs_locku_res res;
faf5f49c
TM
3087 struct nfs4_lock_state *lsp;
3088 struct nfs_open_context *ctx;
911d1aaf
TM
3089 struct file_lock fl;
3090 const struct nfs_server *server;
26e976a8 3091 unsigned long timestamp;
faf5f49c
TM
3092};
3093
911d1aaf
TM
3094static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3095 struct nfs_open_context *ctx,
3096 struct nfs4_lock_state *lsp,
3097 struct nfs_seqid *seqid)
3098{
3099 struct nfs4_unlockdata *p;
3100 struct inode *inode = lsp->ls_state->inode;
3101
3102 p = kmalloc(sizeof(*p), GFP_KERNEL);
3103 if (p == NULL)
3104 return NULL;
3105 p->arg.fh = NFS_FH(inode);
3106 p->arg.fl = &p->fl;
3107 p->arg.seqid = seqid;
3108 p->arg.stateid = &lsp->ls_stateid;
3109 p->lsp = lsp;
3110 atomic_inc(&lsp->ls_count);
3111 /* Ensure we don't close file until we're done freeing locks! */
3112 p->ctx = get_nfs_open_context(ctx);
3113 memcpy(&p->fl, fl, sizeof(p->fl));
3114 p->server = NFS_SERVER(inode);
3115 return p;
3116}
3117
06f814a3 3118static void nfs4_locku_release_calldata(void *data)
faf5f49c 3119{
963d8fe5 3120 struct nfs4_unlockdata *calldata = data;
911d1aaf 3121 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM
3122 nfs4_put_lock_state(calldata->lsp);
3123 put_nfs_open_context(calldata->ctx);
3124 kfree(calldata);
faf5f49c
TM
3125}
3126
963d8fe5 3127static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3128{
963d8fe5 3129 struct nfs4_unlockdata *calldata = data;
faf5f49c 3130
06f814a3
TM
3131 if (RPC_ASSASSINATED(task))
3132 return;
911d1aaf 3133 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM
3134 switch (task->tk_status) {
3135 case 0:
3136 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3137 calldata->res.stateid.data,
faf5f49c 3138 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3139 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM
3140 break;
3141 case -NFS4ERR_STALE_STATEID:
3142 case -NFS4ERR_EXPIRED:
faf5f49c
TM
3143 break;
3144 default:
a6a352e9 3145 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3146 rpc_restart_call(task);
faf5f49c 3147 }
faf5f49c
TM
3148}
3149
4ce70ada 3150static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3151{
4ce70ada 3152 struct nfs4_unlockdata *calldata = data;
1da177e4
LT
3153 struct rpc_message msg = {
3154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM
3155 .rpc_argp = &calldata->arg,
3156 .rpc_resp = &calldata->res,
3157 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3158 };
faf5f49c 3159
911d1aaf 3160 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM
3161 return;
3162 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM
3163 /* Note: exit _without_ running nfs4_locku_done */
3164 task->tk_action = NULL;
faf5f49c
TM
3165 return;
3166 }
26e976a8 3167 calldata->timestamp = jiffies;
faf5f49c
TM
3168 rpc_call_setup(task, &msg, 0);
3169}
3170
963d8fe5 3171static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3172 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3173 .rpc_call_done = nfs4_locku_done,
06f814a3 3174 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM
3175};
3176
a5d16a4d
TM
3177static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3178 struct nfs_open_context *ctx,
3179 struct nfs4_lock_state *lsp,
3180 struct nfs_seqid *seqid)
3181{
3182 struct nfs4_unlockdata *data;
a5d16a4d
TM
3183
3184 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3185 if (data == NULL) {
3186 nfs_free_seqid(seqid);
3187 return ERR_PTR(-ENOMEM);
3188 }
3189
7a1218a2 3190 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM
3191}
3192
faf5f49c
TM
3193static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3194{
911d1aaf 3195 struct nfs_seqid *seqid;
1da177e4 3196 struct nfs4_lock_state *lsp;
06f814a3
TM
3197 struct rpc_task *task;
3198 int status = 0;
faf5f49c 3199
8d0a8a9d 3200 status = nfs4_set_lock_state(state, request);
9b073574
TM
3201 /* Unlock _before_ we do the RPC call */
3202 request->fl_flags |= FL_EXISTS;
3203 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3204 goto out;
8d0a8a9d 3205 if (status != 0)
9b073574
TM
3206 goto out;
3207 /* Is this a delegated lock? */
3208 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3209 goto out;
8d0a8a9d 3210 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3211 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3212 status = -ENOMEM;
911d1aaf 3213 if (seqid == NULL)
9b073574 3214 goto out;
a5d16a4d
TM
3215 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3216 status = PTR_ERR(task);
3217 if (IS_ERR(task))
9b073574 3218 goto out;
a5d16a4d 3219 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3220 rpc_put_task(task);
9b073574 3221out:
1da177e4
LT
3222 return status;
3223}
3224
a5d16a4d
TM
3225struct nfs4_lockdata {
3226 struct nfs_lock_args arg;
3227 struct nfs_lock_res res;
3228 struct nfs4_lock_state *lsp;
3229 struct nfs_open_context *ctx;
3230 struct file_lock fl;
26e976a8 3231 unsigned long timestamp;
a5d16a4d
TM
3232 int rpc_status;
3233 int cancelled;
3234};
3235
3236static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3237 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3238{
a5d16a4d
TM
3239 struct nfs4_lockdata *p;
3240 struct inode *inode = lsp->ls_state->inode;
1da177e4 3241 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM
3242
3243 p = kzalloc(sizeof(*p), GFP_KERNEL);
3244 if (p == NULL)
3245 return NULL;
3246
3247 p->arg.fh = NFS_FH(inode);
3248 p->arg.fl = &p->fl;
3249 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3250 if (p->arg.lock_seqid == NULL)
3251 goto out_free;
3252 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3253 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3254 p->arg.lock_owner.id = lsp->ls_id.id;
a5d16a4d
TM
3255 p->lsp = lsp;
3256 atomic_inc(&lsp->ls_count);
3257 p->ctx = get_nfs_open_context(ctx);
3258 memcpy(&p->fl, fl, sizeof(p->fl));
3259 return p;
3260out_free:
3261 kfree(p);
3262 return NULL;
3263}
3264
3265static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3266{
3267 struct nfs4_lockdata *data = calldata;
3268 struct nfs4_state *state = data->lsp->ls_state;
3269 struct nfs4_state_owner *sp = state->owner;
1da177e4 3270 struct rpc_message msg = {
a5d16a4d
TM
3271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3272 .rpc_argp = &data->arg,
3273 .rpc_resp = &data->res,
3274 .rpc_cred = sp->so_cred,
1da177e4 3275 };
06735b34 3276
a5d16a4d
TM
3277 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3278 return;
3279 dprintk("%s: begin!\n", __FUNCTION__);
3280 /* Do we need to do an open_to_lock_owner? */
3281 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3282 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3283 if (data->arg.open_seqid == NULL) {
3284 data->rpc_status = -ENOMEM;
3285 task->tk_action = NULL;
06735b34 3286 goto out;
8d0a8a9d 3287 }
a5d16a4d
TM
3288 data->arg.open_stateid = &state->stateid;
3289 data->arg.new_lock_owner = 1;
3290 }
26e976a8 3291 data->timestamp = jiffies;
a5d16a4d 3292 rpc_call_setup(task, &msg, 0);
06735b34 3293out:
a5d16a4d
TM
3294 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3295}
3296
3297static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3298{
3299 struct nfs4_lockdata *data = calldata;
3300
3301 dprintk("%s: begin!\n", __FUNCTION__);
3302
3303 data->rpc_status = task->tk_status;
3304 if (RPC_ASSASSINATED(task))
3305 goto out;
3306 if (data->arg.new_lock_owner != 0) {
3307 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3308 if (data->rpc_status == 0)
3309 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3310 else
3311 goto out;
3312 }
3313 if (data->rpc_status == 0) {
3314 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3315 sizeof(data->lsp->ls_stateid.data));
3316 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3317 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d
TM
3318 }
3319 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3320out:
3321 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3322}
3323
3324static void nfs4_lock_release(void *calldata)
3325{
3326 struct nfs4_lockdata *data = calldata;
3327
3328 dprintk("%s: begin!\n", __FUNCTION__);
3329 if (data->arg.open_seqid != NULL)
3330 nfs_free_seqid(data->arg.open_seqid);
3331 if (data->cancelled != 0) {
3332 struct rpc_task *task;
3333 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3334 data->arg.lock_seqid);
3335 if (!IS_ERR(task))
e6b3c4db 3336 rpc_put_task(task);
a5d16a4d
TM
3337 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3338 } else
3339 nfs_free_seqid(data->arg.lock_seqid);
3340 nfs4_put_lock_state(data->lsp);
3341 put_nfs_open_context(data->ctx);
3342 kfree(data);
3343 dprintk("%s: done!\n", __FUNCTION__);
3344}
3345
3346static const struct rpc_call_ops nfs4_lock_ops = {
3347 .rpc_call_prepare = nfs4_lock_prepare,
3348 .rpc_call_done = nfs4_lock_done,
3349 .rpc_release = nfs4_lock_release,
3350};
3351
3352static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3353{
3354 struct nfs4_lockdata *data;
3355 struct rpc_task *task;
3356 int ret;
3357
3358 dprintk("%s: begin!\n", __FUNCTION__);
3359 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3360 fl->fl_u.nfs4_fl.owner);
3361 if (data == NULL)
3362 return -ENOMEM;
3363 if (IS_SETLKW(cmd))
3364 data->arg.block = 1;
3365 if (reclaim != 0)
3366 data->arg.reclaim = 1;
3367 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3368 &nfs4_lock_ops, data);
7a1218a2 3369 if (IS_ERR(task))
a5d16a4d 3370 return PTR_ERR(task);
a5d16a4d
TM
3371 ret = nfs4_wait_for_completion_rpc_task(task);
3372 if (ret == 0) {
3373 ret = data->rpc_status;
3374 if (ret == -NFS4ERR_DENIED)
3375 ret = -EAGAIN;
3376 } else
3377 data->cancelled = 1;
e6b3c4db 3378 rpc_put_task(task);
a5d16a4d
TM
3379 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3380 return ret;
1da177e4
LT
3381}
3382
3383static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3384{
202b50dc
TM
3385 struct nfs_server *server = NFS_SERVER(state->inode);
3386 struct nfs4_exception exception = { };
3387 int err;
3388
3389 do {
42a2d13e
TM
3390 /* Cache the lock if possible... */
3391 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3392 return 0;
202b50dc
TM
3393 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3394 if (err != -NFS4ERR_DELAY)
3395 break;
3396 nfs4_handle_exception(server, err, &exception);
3397 } while (exception.retry);
3398 return err;
1da177e4
LT
3399}
3400
3401static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3402{
202b50dc
TM
3403 struct nfs_server *server = NFS_SERVER(state->inode);
3404 struct nfs4_exception exception = { };
3405 int err;
3406
6bfc93ef
TM
3407 err = nfs4_set_lock_state(state, request);
3408 if (err != 0)
3409 return err;
202b50dc 3410 do {
42a2d13e
TM
3411 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3412 return 0;
202b50dc
TM
3413 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3414 if (err != -NFS4ERR_DELAY)
3415 break;
3416 nfs4_handle_exception(server, err, &exception);
3417 } while (exception.retry);
3418 return err;
1da177e4
LT
3419}
3420
3421static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3422{
adfa6f98 3423 struct nfs_client *clp = state->owner->so_client;
01c3b861 3424 unsigned char fl_flags = request->fl_flags;
1da177e4
LT
3425 int status;
3426
6bfc93ef 3427 /* Is this a delegated open? */
6bfc93ef
TM
3428 status = nfs4_set_lock_state(state, request);
3429 if (status != 0)
3430 goto out;
01c3b861
TM
3431 request->fl_flags |= FL_ACCESS;
3432 status = do_vfs_lock(request->fl_file, request);
3433 if (status < 0)
3434 goto out;
3435 down_read(&clp->cl_sem);
3436 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3437 struct nfs_inode *nfsi = NFS_I(state->inode);
3438 /* Yes: cache locks! */
3439 down_read(&nfsi->rwsem);
3440 /* ...but avoid races with delegation recall... */
3441 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3442 request->fl_flags = fl_flags & ~FL_SLEEP;
3443 status = do_vfs_lock(request->fl_file, request);
3444 up_read(&nfsi->rwsem);
3445 goto out_unlock;
3446 }
3447 up_read(&nfsi->rwsem);
3448 }
6bfc93ef
TM
3449 status = _nfs4_do_setlk(state, cmd, request, 0);
3450 if (status != 0)
01c3b861 3451 goto out_unlock;
6bfc93ef 3452 /* Note: we always want to sleep here! */
01c3b861 3453 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM
3454 if (do_vfs_lock(request->fl_file, request) < 0)
3455 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3456out_unlock:
1da177e4 3457 up_read(&clp->cl_sem);
01c3b861
TM
3458out:
3459 request->fl_flags = fl_flags;
1da177e4
LT
3460 return status;
3461}
3462
3463static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3464{
3465 struct nfs4_exception exception = { };
3466 int err;
3467
3468 do {
3469 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3470 _nfs4_proc_setlk(state, cmd, request),
3471 &exception);
3472 } while (exception.retry);
3473 return err;
3474}
3475
3476static int
3477nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3478{
3479 struct nfs_open_context *ctx;
3480 struct nfs4_state *state;
3481 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3482 int status;
3483
3484 /* verify open state */
3485 ctx = (struct nfs_open_context *)filp->private_data;
3486 state = ctx->state;
3487
3488 if (request->fl_start < 0 || request->fl_end < 0)
3489 return -EINVAL;
3490
3491 if (IS_GETLK(cmd))
3492 return nfs4_proc_getlk(state, F_GETLK, request);
3493
3494 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3495 return -EINVAL;
3496
3497 if (request->fl_type == F_UNLCK)
3498 return nfs4_proc_unlck(state, cmd, request);
3499
3500 do {
3501 status = nfs4_proc_setlk(state, cmd, request);
3502 if ((status != -EAGAIN) || IS_SETLK(cmd))
3503 break;
3504 timeout = nfs4_set_lock_task_retry(timeout);
3505 status = -ERESTARTSYS;
3506 if (signalled())
3507 break;
3508 } while(status < 0);
1da177e4
LT
3509 return status;
3510}
3511
888e694c
TM
3512int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3513{
3514 struct nfs_server *server = NFS_SERVER(state->inode);
3515 struct nfs4_exception exception = { };
3516 int err;
3517
3518 err = nfs4_set_lock_state(state, fl);
3519 if (err != 0)
3520 goto out;
3521 do {
3522 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3523 if (err != -NFS4ERR_DELAY)
3524 break;
3525 err = nfs4_handle_exception(server, err, &exception);
3526 } while (exception.retry);
3527out:
3528 return err;
3529}
6b3b5496 3530
aa1870af
BF
3531#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3532
6b3b5496
BF
3533int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3534 size_t buflen, int flags)
3535{
4b580ee3
BF
3536 struct inode *inode = dentry->d_inode;
3537
3538 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3539 return -EOPNOTSUPP;
3540
3541 if (!S_ISREG(inode->i_mode) &&
3542 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3543 return -EPERM;
3544
3545 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF
3546}
3547
3548/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3549 * and that's what we'll do for e.g. user attributes that haven't been set.
3550 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3551 * attributes in kernel-managed attribute namespaces. */
3552ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3553 size_t buflen)
3554{
aa1870af
BF
3555 struct inode *inode = dentry->d_inode;
3556
3557 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3558 return -EOPNOTSUPP;
3559
3560 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF
3561}
3562
3563ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3564{
aa1870af 3565 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3566
096455a2
BF
3567 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3568 return 0;
6b3b5496
BF
3569 if (buf && buflen < len)
3570 return -ERANGE;
3571 if (buf)
aa1870af
BF
3572 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3573 return len;
6b3b5496
BF
3574}
3575
c228fd3a 3576int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name,
7aaa0b3b 3577 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM
3578{
3579 struct nfs_server *server = NFS_SERVER(dir);
3580 u32 bitmask[2] = {
361e624f
MN
3581 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3582 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM
3583 };
3584 struct nfs4_fs_locations_arg args = {
3585 .dir_fh = NFS_FH(dir),
c228fd3a 3586 .name = name,
683b57b4
TM
3587 .page = page,
3588 .bitmask = bitmask,
3589 };
3590 struct rpc_message msg = {
3591 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3592 .rpc_argp = &args,
7aaa0b3b 3593 .rpc_resp = fs_locations,
683b57b4
TM
3594 };
3595 int status;
3596
3597 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3598 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3599 fs_locations->server = server;
830b8e33 3600 fs_locations->nlocations = 0;
683b57b4
TM
3601 status = rpc_call_sync(server->client, &msg, 0);
3602 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3603 return status;
3604}
3605
1da177e4
LT
3606struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3607 .recover_open = nfs4_open_reclaim,
3608 .recover_lock = nfs4_lock_reclaim,
3609};
3610
3611struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3612 .recover_open = nfs4_open_expired,
3613 .recover_lock = nfs4_lock_expired,
3614};
3615
92e1d5be 3616static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF
3617 .permission = nfs_permission,
3618 .getattr = nfs_getattr,
3619 .setattr = nfs_setattr,
3620 .getxattr = nfs4_getxattr,
3621 .setxattr = nfs4_setxattr,
3622 .listxattr = nfs4_listxattr,
3623};
3624
509de811 3625const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT
3626 .version = 4, /* protocol version */
3627 .dentry_ops = &nfs4_dentry_operations,
3628 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3629 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT
3630 .getroot = nfs4_proc_get_root,
3631 .getattr = nfs4_proc_getattr,
3632 .setattr = nfs4_proc_setattr,
2b3de441 3633 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT
3634 .lookup = nfs4_proc_lookup,
3635 .access = nfs4_proc_access,
3636 .readlink = nfs4_proc_readlink,
1da177e4
LT
3637 .create = nfs4_proc_create,
3638 .remove = nfs4_proc_remove,
3639 .unlink_setup = nfs4_proc_unlink_setup,
3640 .unlink_done = nfs4_proc_unlink_done,
3641 .rename = nfs4_proc_rename,
3642 .link = nfs4_proc_link,
3643 .symlink = nfs4_proc_symlink,
3644 .mkdir = nfs4_proc_mkdir,
3645 .rmdir = nfs4_proc_remove,
3646 .readdir = nfs4_proc_readdir,
3647 .mknod = nfs4_proc_mknod,
3648 .statfs = nfs4_proc_statfs,
3649 .fsinfo = nfs4_proc_fsinfo,
3650 .pathconf = nfs4_proc_pathconf,
e9326dca 3651 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT
3652 .decode_dirent = nfs4_decode_dirent,
3653 .read_setup = nfs4_proc_read_setup,
ec06c096 3654 .read_done = nfs4_read_done,
1da177e4 3655 .write_setup = nfs4_proc_write_setup,
788e7a89 3656 .write_done = nfs4_write_done,
1da177e4 3657 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3658 .commit_done = nfs4_commit_done,
02a913a7
TM
3659 .file_open = nfs_open,
3660 .file_release = nfs_release,
1da177e4 3661 .lock = nfs4_proc_lock,
e50a1c2e 3662 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT
3663};
3664
3665/*
3666 * Local variables:
3667 * c-basic-offset: 8
3668 * End:
3669 */