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NFSv4: Always use the delegation if we have one
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
006ea73e 54#include "iostat.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
2066fe89 58#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
cdd4e68b 61struct nfs4_opendata;
864472e9 62static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 63static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 64static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
1da177e4 65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
faf5f49c 66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
adfa6f98 67static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
1da177e4 68
1da177e4
LT		 69/* Prevent leaks of NFSv4 errors into userland */
70int nfs4_map_errors(int err)
71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
74 __FUNCTION__, -err);
75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
830b8e33
MN		 122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
bc4785cd 141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 142 struct nfs4_readdir_arg *readdir)
143{
0dbb4c67 144 __be32 *start, *p;
1da177e4
LT		 145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
b7ef1956 148 readdir->cookie = cookie;
1da177e4
LT		 149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
0dbb4c67 165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
26e976a8 196static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 197{
7539bbab 198 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 199 spin_lock(&clp->cl_lock);
200 if (time_before(clp->cl_last_renewal,timestamp))
201 clp->cl_last_renewal = timestamp;
202 spin_unlock(&clp->cl_lock);
203}
204
38478b24 205static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 206{
38478b24 207 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 208
38478b24
TM		 209 spin_lock(&dir->i_lock);
210 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
1da177e4
LT		 211 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
212 nfsi->change_attr = cinfo->after;
38478b24 213 spin_unlock(&dir->i_lock);
1da177e4
LT		 214}
215
e56e0b78 216struct nfs4_opendata {
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
003707c7 322static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 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 }
003707c7
TM		 334 nfs4_state_set_mode_locked(state, state->state | open_flags);
335}
336
337static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
338{
339 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
340 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
341 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
342 switch (open_flags) {
343 case FMODE_READ:
344 set_bit(NFS_O_RDONLY_STATE, &state->flags);
345 break;
346 case FMODE_WRITE:
347 set_bit(NFS_O_WRONLY_STATE, &state->flags);
348 break;
349 case FMODE_READ|FMODE_WRITE:
350 set_bit(NFS_O_RDWR_STATE, &state->flags);
351 }
e7616923
TM		 352}
353
003707c7
TM		 354static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
355{
356 spin_lock(&state->owner->so_lock);
357 spin_lock(&state->inode->i_lock);
358 nfs_set_open_stateid_locked(state, stateid, open_flags);
359 spin_unlock(&state->inode->i_lock);
360 spin_unlock(&state->owner->so_lock);
361}
362
363static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
1da177e4
LT		 364{
365 struct inode *inode = state->inode;
366
367 open_flags &= (FMODE_READ|FMODE_WRITE);
d530838b 368 /* Protect against nfs4_find_state_byowner() */
ec073428 369 spin_lock(&state->owner->so_lock);
1da177e4 370 spin_lock(&inode->i_lock);
003707c7
TM		 371 if (deleg_stateid != NULL) {
372 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
373 set_bit(NFS_DELEGATED_STATE, &state->flags);
374 }
375 if (open_stateid != NULL)
376 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
e7616923 377 update_open_stateflags(state, open_flags);
1da177e4 378 spin_unlock(&inode->i_lock);
ec073428 379 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 380}
381
24ac23ab
TM		 382static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
383{
384 struct inode *inode;
385 struct nfs4_state *state = NULL;
003707c7
TM		 386 struct nfs_delegation *delegation;
387 nfs4_stateid *deleg_stateid = NULL;
24ac23ab
TM		 388
389 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
390 goto out;
391 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
03f28e3a 392 if (IS_ERR(inode))
24ac23ab
TM		 393 goto out;
394 state = nfs4_get_open_state(inode, data->owner);
395 if (state == NULL)
396 goto put_inode;
549d6ed5 397 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 398 int delegation_flags = 0;
399
003707c7
TM		 400 rcu_read_lock();
401 delegation = rcu_dereference(NFS_I(inode)->delegation);
402 if (delegation)
403 delegation_flags = delegation->flags;
404 rcu_read_unlock();
549d6ed5
TM		 405 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
406 nfs_inode_set_delegation(state->inode,
407 data->owner->so_cred,
408 &data->o_res);
409 else
410 nfs_inode_reclaim_delegation(state->inode,
411 data->owner->so_cred,
412 &data->o_res);
413 }
003707c7
TM		 414 rcu_read_lock();
415 delegation = rcu_dereference(NFS_I(inode)->delegation);
416 if (delegation != NULL)
417 deleg_stateid = &delegation->stateid;
418 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
419 rcu_read_unlock();
24ac23ab
TM		 420put_inode:
421 iput(inode);
422out:
423 return state;
424}
425
864472e9
TM		 426static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
427{
428 struct nfs_inode *nfsi = NFS_I(state->inode);
429 struct nfs_open_context *ctx;
430
431 spin_lock(&state->inode->i_lock);
432 list_for_each_entry(ctx, &nfsi->open_files, list) {
433 if (ctx->state != state)
434 continue;
435 get_nfs_open_context(ctx);
436 spin_unlock(&state->inode->i_lock);
437 return ctx;
438 }
439 spin_unlock(&state->inode->i_lock);
440 return ERR_PTR(-ENOENT);
441}
442
2ced46c2 443static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 444{
2ced46c2 445 struct nfs4_state *newstate;
864472e9
TM		 446 int ret;
447
448 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 449 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
450 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
451 nfs4_init_opendata_res(opendata);
864472e9
TM		 452 ret = _nfs4_proc_open(opendata);
453 if (ret != 0)
454 return ret;
2ced46c2
TM		 455 newstate = nfs4_opendata_to_nfs4_state(opendata);
456 if (newstate != NULL)
457 nfs4_close_state(&opendata->path, newstate, openflags);
458 *res = newstate;
864472e9
TM		 459 return 0;
460}
461
462static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
463{
864472e9 464 struct nfs4_state *newstate;
864472e9
TM		 465 int ret;
466
467 /* memory barrier prior to reading state->n_* */
2ced46c2 468 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 469 smp_rmb();
470 if (state->n_rdwr != 0) {
2ced46c2 471 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 472 if (ret != 0)
473 return ret;
2ced46c2
TM		 474 if (newstate != state)
475 return -ESTALE;
864472e9
TM		 476 }
477 if (state->n_wronly != 0) {
2ced46c2 478 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 479 if (ret != 0)
480 return ret;
2ced46c2
TM		 481 if (newstate != state)
482 return -ESTALE;
864472e9
TM		 483 }
484 if (state->n_rdonly != 0) {
2ced46c2 485 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 486 if (ret != 0)
487 return ret;
2ced46c2
TM		 488 if (newstate != state)
489 return -ESTALE;
864472e9 490 }
864472e9
TM		 491 return 0;
492}
493
1da177e4
LT		 494/*
495 * OPEN_RECLAIM:
496 * reclaim state on the server after a reboot.
1da177e4 497 */
539cd03a 498static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 499{
864472e9
TM		 500 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
501 struct nfs4_opendata *opendata;
502 int delegation_type = 0;
1da177e4
LT		 503 int status;
504
505 if (delegation != NULL) {
506 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
507 memcpy(&state->stateid, &delegation->stateid,
508 sizeof(state->stateid));
509 set_bit(NFS_DELEGATED_STATE, &state->flags);
510 return 0;
511 }
864472e9 512 delegation_type = delegation->type;
1da177e4 513 }
ad389da7 514 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
864472e9 515 if (opendata == NULL)
cee54fc9 516 return -ENOMEM;
864472e9
TM		 517 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
518 opendata->o_arg.fh = NFS_FH(state->inode);
519 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
520 opendata->o_arg.u.delegation_type = delegation_type;
521 status = nfs4_open_recover(opendata, state);
c6d00e63 522 nfs4_opendata_put(opendata);
1da177e4
LT		 523 return status;
524}
525
539cd03a 526static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 527{
528 struct nfs_server *server = NFS_SERVER(state->inode);
529 struct nfs4_exception exception = { };
530 int err;
531 do {
539cd03a 532 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 533 if (err != -NFS4ERR_DELAY)
534 break;
535 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 536 } while (exception.retry);
537 return err;
538}
539
864472e9
TM		 540static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
541{
542 struct nfs_open_context *ctx;
543 int ret;
544
545 ctx = nfs4_state_find_open_context(state);
546 if (IS_ERR(ctx))
547 return PTR_ERR(ctx);
539cd03a 548 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 549 put_nfs_open_context(ctx);
550 return ret;
551}
552
13437e12 553static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 554{
555 struct nfs4_state_owner *sp = state->owner;
e56e0b78 556 struct nfs4_opendata *opendata;
864472e9 557 int ret;
1da177e4 558
ad389da7 559 opendata = nfs4_opendata_alloc(&ctx->path, sp, 0, NULL);
e56e0b78 560 if (opendata == NULL)
864472e9 561 return -ENOMEM;
e56e0b78 562 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 563 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 564 sizeof(opendata->o_arg.u.delegation.data));
864472e9 565 ret = nfs4_open_recover(opendata, state);
c6d00e63 566 nfs4_opendata_put(opendata);
864472e9 567 return ret;
1da177e4
LT		 568}
569
13437e12 570int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 571{
572 struct nfs4_exception exception = { };
539cd03a 573 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 574 int err;
575 do {
13437e12 576 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 577 switch (err) {
578 case 0:
579 return err;
580 case -NFS4ERR_STALE_CLIENTID:
581 case -NFS4ERR_STALE_STATEID:
582 case -NFS4ERR_EXPIRED:
583 /* Don't recall a delegation if it was lost */
7539bbab 584 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 585 return err;
586 }
587 err = nfs4_handle_exception(server, err, &exception);
588 } while (exception.retry);
589 return err;
590}
591
cdd4e68b 592static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 593{
cdd4e68b
TM		 594 struct nfs4_opendata *data = calldata;
595 struct rpc_message msg = {
596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
597 .rpc_argp = &data->c_arg,
598 .rpc_resp = &data->c_res,
599 .rpc_cred = data->owner->so_cred,
1da177e4 600 };
26e976a8 601 data->timestamp = jiffies;
cdd4e68b
TM		 602 rpc_call_setup(task, &msg, 0);
603}
604
605static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
606{
607 struct nfs4_opendata *data = calldata;
608
609 data->rpc_status = task->tk_status;
610 if (RPC_ASSASSINATED(task))
611 return;
26e976a8 612 if (data->rpc_status == 0) {
cdd4e68b
TM		 613 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
614 sizeof(data->o_res.stateid.data));
26e976a8
TM		 615 renew_lease(data->o_res.server, data->timestamp);
616 }
cdd4e68b 617 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
0f9f95e0 618 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
cdd4e68b
TM		 619}
620
621static void nfs4_open_confirm_release(void *calldata)
622{
623 struct nfs4_opendata *data = calldata;
624 struct nfs4_state *state = NULL;
625
626 /* If this request hasn't been cancelled, do nothing */
627 if (data->cancelled == 0)
628 goto out_free;
629 /* In case of error, no cleanup! */
630 if (data->rpc_status != 0)
631 goto out_free;
632 nfs_confirm_seqid(&data->owner->so_seqid, 0);
633 state = nfs4_opendata_to_nfs4_state(data);
634 if (state != NULL)
4a35bd41 635 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 636out_free:
c6d00e63 637 nfs4_opendata_put(data);
cdd4e68b
TM		 638}
639
640static const struct rpc_call_ops nfs4_open_confirm_ops = {
641 .rpc_call_prepare = nfs4_open_confirm_prepare,
642 .rpc_call_done = nfs4_open_confirm_done,
643 .rpc_release = nfs4_open_confirm_release,
644};
645
646/*
647 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
648 */
649static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
650{
651 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
652 struct rpc_task *task;
1da177e4
LT		 653 int status;
654
c6d00e63 655 kref_get(&data->kref);
7a1218a2
TM		 656 /*
657 * If rpc_run_task() ends up calling ->rpc_release(), we
658 * want to ensure that it takes the 'error' code path.
659 */
660 data->rpc_status = -ENOMEM;
cdd4e68b 661 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
7a1218a2 662 if (IS_ERR(task))
cdd4e68b 663 return PTR_ERR(task);
cdd4e68b
TM		 664 status = nfs4_wait_for_completion_rpc_task(task);
665 if (status != 0) {
666 data->cancelled = 1;
667 smp_wmb();
668 } else
669 status = data->rpc_status;
e6b3c4db 670 rpc_put_task(task);
1da177e4
LT		 671 return status;
672}
673
24ac23ab 674static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 675{
24ac23ab
TM		 676 struct nfs4_opendata *data = calldata;
677 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 678 struct rpc_message msg = {
679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 680 .rpc_argp = &data->o_arg,
681 .rpc_resp = &data->o_res,
1da177e4
LT		 682 .rpc_cred = sp->so_cred,
683 };
24ac23ab
TM		 684
685 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
686 return;
687 /* Update sequence id. */
9f958ab8 688 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 689 data->o_arg.clientid = sp->so_client->cl_clientid;
864472e9
TM		 690 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
691 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
26e976a8 692 data->timestamp = jiffies;
24ac23ab
TM		 693 rpc_call_setup(task, &msg, 0);
694}
1da177e4 695
24ac23ab
TM		 696static void nfs4_open_done(struct rpc_task *task, void *calldata)
697{
698 struct nfs4_opendata *data = calldata;
1da177e4 699
24ac23ab
TM		 700 data->rpc_status = task->tk_status;
701 if (RPC_ASSASSINATED(task))
702 return;
703 if (task->tk_status == 0) {
704 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 705 case S_IFREG:
706 break;
707 case S_IFLNK:
24ac23ab 708 data->rpc_status = -ELOOP;
6f926b5b
TM		 709 break;
710 case S_IFDIR:
24ac23ab 711 data->rpc_status = -EISDIR;
6f926b5b
TM		 712 break;
713 default:
24ac23ab 714 data->rpc_status = -ENOTDIR;
6f926b5b 715 }
26e976a8 716 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 717 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
718 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 719 }
24ac23ab
TM		 720 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
721}
6f926b5b 722
24ac23ab
TM		 723static void nfs4_open_release(void *calldata)
724{
725 struct nfs4_opendata *data = calldata;
726 struct nfs4_state *state = NULL;
727
728 /* If this request hasn't been cancelled, do nothing */
729 if (data->cancelled == 0)
730 goto out_free;
731 /* In case of error, no cleanup! */
732 if (data->rpc_status != 0)
733 goto out_free;
734 /* In case we need an open_confirm, no cleanup! */
735 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
736 goto out_free;
737 nfs_confirm_seqid(&data->owner->so_seqid, 0);
738 state = nfs4_opendata_to_nfs4_state(data);
739 if (state != NULL)
4a35bd41 740 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 741out_free:
c6d00e63 742 nfs4_opendata_put(data);
24ac23ab
TM		 743}
744
745static const struct rpc_call_ops nfs4_open_ops = {
746 .rpc_call_prepare = nfs4_open_prepare,
747 .rpc_call_done = nfs4_open_done,
748 .rpc_release = nfs4_open_release,
749};
750
751/*
752 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
753 */
754static int _nfs4_proc_open(struct nfs4_opendata *data)
755{
756 struct inode *dir = data->dir->d_inode;
757 struct nfs_server *server = NFS_SERVER(dir);
758 struct nfs_openargs *o_arg = &data->o_arg;
759 struct nfs_openres *o_res = &data->o_res;
760 struct rpc_task *task;
761 int status;
762
c6d00e63 763 kref_get(&data->kref);
7a1218a2
TM		 764 /*
765 * If rpc_run_task() ends up calling ->rpc_release(), we
766 * want to ensure that it takes the 'error' code path.
767 */
768 data->rpc_status = -ENOMEM;
2ced46c2 769 data->cancelled = 0;
24ac23ab 770 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
7a1218a2 771 if (IS_ERR(task))
24ac23ab 772 return PTR_ERR(task);
24ac23ab
TM		 773 status = nfs4_wait_for_completion_rpc_task(task);
774 if (status != 0) {
775 data->cancelled = 1;
776 smp_wmb();
777 } else
778 status = data->rpc_status;
e6b3c4db 779 rpc_put_task(task);
1da177e4 780 if (status != 0)
24ac23ab
TM		 781 return status;
782
56ae19f3
TM		 783 if (o_arg->open_flags & O_CREAT) {
784 update_changeattr(dir, &o_res->cinfo);
785 nfs_post_op_update_inode(dir, o_res->dir_attr);
786 } else
787 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 788 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 789 status = _nfs4_proc_open_confirm(data);
1da177e4 790 if (status != 0)
24ac23ab 791 return status;
1da177e4
LT		 792 }
793 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8fa5c000 794 return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 795 return 0;
1da177e4
LT		 796}
797
798static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
799{
800 struct nfs_access_entry cache;
801 int mask = 0;
802 int status;
803
804 if (openflags & FMODE_READ)
805 mask |= MAY_READ;
806 if (openflags & FMODE_WRITE)
807 mask |= MAY_WRITE;
1b45c46c
TM		 808 if (openflags & FMODE_EXEC)
809 mask |= MAY_EXEC;
1da177e4
LT		 810 status = nfs_access_get_cached(inode, cred, &cache);
811 if (status == 0)
812 goto out;
813
814 /* Be clever: ask server to check for all possible rights */
815 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
816 cache.cred = cred;
817 cache.jiffies = jiffies;
818 status = _nfs4_proc_access(inode, &cache);
819 if (status != 0)
820 return status;
821 nfs_access_add_cache(inode, &cache);
822out:
823 if ((cache.mask & mask) == mask)
824 return 0;
825 return -EACCES;
826}
827
10afec90 828static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 829{
7539bbab 830 struct nfs_client *clp = server->nfs_client;
6b30954e 831 int ret;
58d9714a 832
6b30954e
TM		 833 for (;;) {
834 ret = nfs4_wait_clnt_recover(server->client, clp);
835 if (ret != 0)
836 return ret;
837 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
838 break;
58d9714a 839 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 840 }
841 return 0;
58d9714a
TM		 842}
843
1da177e4
LT		 844/*
845 * OPEN_EXPIRED:
846 * reclaim state on the server after a network partition.
847 * Assumes caller holds the appropriate lock
848 */
539cd03a 849static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 850{
1da177e4 851 struct inode *inode = state->inode;
1da177e4 852 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
e56e0b78 853 struct nfs4_opendata *opendata;
24ac23ab 854 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
864472e9 855 int ret;
1da177e4
LT		 856
857 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
539cd03a 858 ret = _nfs4_do_access(inode, ctx->cred, openflags);
864472e9
TM		 859 if (ret < 0)
860 return ret;
1da177e4
LT		 861 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
862 set_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9 863 return 0;
1da177e4 864 }
ad389da7 865 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, openflags, NULL);
e56e0b78 866 if (opendata == NULL)
864472e9
TM		 867 return -ENOMEM;
868 ret = nfs4_open_recover(opendata, state);
869 if (ret == -ESTALE) {
870 /* Invalidate the state owner so we don't ever use it again */
539cd03a
TM		 871 nfs4_drop_state_owner(state->owner);
872 d_drop(ctx->path.dentry);
1da177e4 873 }
c6d00e63 874 nfs4_opendata_put(opendata);
864472e9 875 return ret;
1da177e4
LT		 876}
877
539cd03a 878static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 879{
539cd03a 880 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 881 struct nfs4_exception exception = { };
882 int err;
883
884 do {
539cd03a 885 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 886 if (err == -NFS4ERR_DELAY)
887 nfs4_handle_exception(server, err, &exception);
888 } while (exception.retry);
889 return err;
890}
891
1da177e4
LT		 892static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
893{
1da177e4 894 struct nfs_open_context *ctx;
864472e9 895 int ret;
1da177e4 896
864472e9
TM		 897 ctx = nfs4_state_find_open_context(state);
898 if (IS_ERR(ctx))
899 return PTR_ERR(ctx);
539cd03a 900 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 901 put_nfs_open_context(ctx);
902 return ret;
1da177e4
LT		 903}
904
905/*
24ac23ab 906 * Returns a referenced nfs4_state if there is an open delegation on the file
1da177e4
LT		 907 */
908static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
909{
910 struct nfs_delegation *delegation;
911 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 912 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 913 struct nfs_inode *nfsi = NFS_I(inode);
914 struct nfs4_state_owner *sp = NULL;
915 struct nfs4_state *state = NULL;
916 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
917 int err;
918
b4454fe1
TM		 919 err = -ENOMEM;
920 if (!(sp = nfs4_get_state_owner(server, cred))) {
921 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
922 return err;
923 }
58d9714a
TM		 924 err = nfs4_recover_expired_lease(server);
925 if (err != 0)
b4454fe1 926 goto out_put_state_owner;
1da177e4
LT		 927 /* Protect against reboot recovery - NOTE ORDER! */
928 down_read(&clp->cl_sem);
929 /* Protect against delegation recall */
930 down_read(&nfsi->rwsem);
931 delegation = NFS_I(inode)->delegation;
932 err = -ENOENT;
933 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
934 goto out_err;
935 err = -ENOMEM;
1da177e4
LT		 936 state = nfs4_get_open_state(inode, sp);
937 if (state == NULL)
938 goto out_err;
939
940 err = -ENOENT;
941 if ((state->state & open_flags) == open_flags) {
942 spin_lock(&inode->i_lock);
e7616923 943 update_open_stateflags(state, open_flags);
1da177e4
LT		 944 spin_unlock(&inode->i_lock);
945 goto out_ok;
946 } else if (state->state != 0)
b4454fe1 947 goto out_put_open_state;
1da177e4
LT		 948
949 lock_kernel();
950 err = _nfs4_do_access(inode, cred, open_flags);
951 unlock_kernel();
952 if (err != 0)
b4454fe1 953 goto out_put_open_state;
003707c7 954 update_open_stateid(state, NULL, &delegation->stateid, open_flags);
1da177e4 955out_ok:
1da177e4
LT		 956 nfs4_put_state_owner(sp);
957 up_read(&nfsi->rwsem);
958 up_read(&clp->cl_sem);
1da177e4 959 *res = state;
b4454fe1
TM		 960 return 0;
961out_put_open_state:
962 nfs4_put_open_state(state);
1da177e4 963out_err:
1da177e4
LT		 964 up_read(&nfsi->rwsem);
965 up_read(&clp->cl_sem);
b8e5c4c2
TM		 966 if (err != -EACCES)
967 nfs_inode_return_delegation(inode);
b4454fe1
TM		 968out_put_state_owner:
969 nfs4_put_state_owner(sp);
1da177e4
LT		 970 return err;
971}
972
973static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
974{
975 struct nfs4_exception exception = { };
a162a6b8 976 struct nfs4_state *res = ERR_PTR(-EIO);
1da177e4
LT		 977 int err;
978
979 do {
980 err = _nfs4_open_delegated(inode, flags, cred, &res);
981 if (err == 0)
982 break;
983 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
984 err, &exception));
985 } while (exception.retry);
986 return res;
987}
988
aa53ed54
JL		 989/*
990 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
991 * fields corresponding to attributes that were used to store the verifier.
992 * Make sure we clobber those fields in the later setattr call
993 */
994static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
995{
996 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
997 !(sattr->ia_valid & ATTR_ATIME_SET))
998 sattr->ia_valid |= ATTR_ATIME;
999
1000 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1001 !(sattr->ia_valid & ATTR_MTIME_SET))
1002 sattr->ia_valid |= ATTR_MTIME;
1003}
1004
1da177e4 1005/*
24ac23ab 1006 * Returns a referenced nfs4_state
1da177e4 1007 */
ad389da7 1008static 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		 1009{
1010 struct nfs4_state_owner *sp;
1011 struct nfs4_state *state = NULL;
1012 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1013 struct nfs_client *clp = server->nfs_client;
e56e0b78 1014 struct nfs4_opendata *opendata;
1da177e4 1015 int status;
1da177e4
LT		 1016
1017 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1018 status = -ENOMEM;
1019 if (!(sp = nfs4_get_state_owner(server, cred))) {
1020 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1021 goto out_err;
1022 }
58d9714a
TM		 1023 status = nfs4_recover_expired_lease(server);
1024 if (status != 0)
b4454fe1 1025 goto err_put_state_owner;
58d9714a
TM		 1026 down_read(&clp->cl_sem);
1027 status = -ENOMEM;
ad389da7 1028 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1029 if (opendata == NULL)
76723de0 1030 goto err_release_rwsem;
1da177e4 1031
24ac23ab 1032 status = _nfs4_proc_open(opendata);
1da177e4 1033 if (status != 0)
c6d00e63 1034 goto err_opendata_put;
1da177e4 1035
aa53ed54
JL		 1036 if (opendata->o_arg.open_flags & O_EXCL)
1037 nfs4_exclusive_attrset(opendata, sattr);
1038
1da177e4 1039 status = -ENOMEM;
24ac23ab
TM		 1040 state = nfs4_opendata_to_nfs4_state(opendata);
1041 if (state == NULL)
c6d00e63 1042 goto err_opendata_put;
c6d00e63 1043 nfs4_opendata_put(opendata);
1da177e4
LT		 1044 nfs4_put_state_owner(sp);
1045 up_read(&clp->cl_sem);
1046 *res = state;
1047 return 0;
c6d00e63
TM		 1048err_opendata_put:
1049 nfs4_opendata_put(opendata);
76723de0
TM		 1050err_release_rwsem:
1051 up_read(&clp->cl_sem);
e56e0b78
TM		 1052err_put_state_owner:
1053 nfs4_put_state_owner(sp);
1da177e4 1054out_err:
1da177e4
LT		 1055 *res = NULL;
1056 return status;
1057}
1058
1059
ad389da7 1060static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1061{
1062 struct nfs4_exception exception = { };
1063 struct nfs4_state *res;
1064 int status;
1065
1066 do {
ad389da7 1067 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1068 if (status == 0)
1069 break;
1070 /* NOTE: BAD_SEQID means the server and client disagree about the
1071 * book-keeping w.r.t. state-changing operations
1072 * (OPEN/CLOSE/LOCK/LOCKU...)
1073 * It is actually a sign of a bug on the client or on the server.
1074 *
1075 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1076 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1077 * have unhashed the old state_owner for us, and that we can
1078 * therefore safely retry using a new one. We should still warn
1079 * the user though...
1080 */
1081 if (status == -NFS4ERR_BAD_SEQID) {
1082 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1083 exception.retry = 1;
1084 continue;
1085 }
550f5747
TM		 1086 /*
1087 * BAD_STATEID on OPEN means that the server cancelled our
1088 * state before it received the OPEN_CONFIRM.
1089 * Recover by retrying the request as per the discussion
1090 * on Page 181 of RFC3530.
1091 */
1092 if (status == -NFS4ERR_BAD_STATEID) {
1093 exception.retry = 1;
1094 continue;
1095 }
1da177e4
LT		 1096 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1097 status, &exception));
1098 } while (exception.retry);
1099 return res;
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 1106 struct nfs_setattrargs arg = {
3e4f6290 1107 .fh = NFS_FH(inode),
1da177e4
LT		 1108 .iap = sattr,
1109 .server = server,
1110 .bitmask = server->attr_bitmask,
1111 };
1112 struct nfs_setattrres res = {
1113 .fattr = fattr,
1114 .server = server,
1115 };
1116 struct rpc_message msg = {
1117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1118 .rpc_argp = &arg,
1119 .rpc_resp = &res,
1120 };
26e976a8 1121 unsigned long timestamp = jiffies;
65e4308d 1122 int status;
1da177e4 1123
0e574af1 1124 nfs_fattr_init(fattr);
1da177e4 1125
3e4f6290
TM		 1126 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1127 /* Use that stateid */
1128 } else if (state != NULL) {
1da177e4 1129 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1130 nfs4_copy_stateid(&arg.stateid, state, current->files);
1131 } else
1da177e4
LT		 1132 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1133
65e4308d 1134 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1135 if (status == 0 && state != NULL)
1136 renew_lease(server, timestamp);
65e4308d 1137 return status;
1da177e4
LT		 1138}
1139
3e4f6290
TM		 1140static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1141 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1142{
3e4f6290 1143 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1144 struct nfs4_exception exception = { };
1145 int err;
1146 do {
1147 err = nfs4_handle_exception(server,
3e4f6290 1148 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1149 &exception);
1150 } while (exception.retry);
1151 return err;
1152}
1153
1154struct nfs4_closedata {
4a35bd41 1155 struct path path;
1da177e4
LT		 1156 struct inode *inode;
1157 struct nfs4_state *state;
1158 struct nfs_closeargs arg;
1159 struct nfs_closeres res;
516a6af6 1160 struct nfs_fattr fattr;
26e976a8 1161 unsigned long timestamp;
1da177e4
LT		 1162};
1163
963d8fe5 1164static void nfs4_free_closedata(void *data)
9512135d 1165{
963d8fe5
TM		 1166 struct nfs4_closedata *calldata = data;
1167 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1168
1169 nfs4_put_open_state(calldata->state);
1170 nfs_free_seqid(calldata->arg.seqid);
9512135d 1171 nfs4_put_state_owner(sp);
4a35bd41
TM		 1172 dput(calldata->path.dentry);
1173 mntput(calldata->path.mnt);
9512135d
TM		 1174 kfree(calldata);
1175}
1176
963d8fe5 1177static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1178{
963d8fe5 1179 struct nfs4_closedata *calldata = data;
1da177e4 1180 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1181 struct nfs_server *server = NFS_SERVER(calldata->inode);
1182
4ce70ada
TM		 1183 if (RPC_ASSASSINATED(task))
1184 return;
1da177e4
LT		 1185 /* hmm. we are done with the inode, and in the process of freeing
1186 * the state_owner. we keep this around to process errors
1187 */
cee54fc9 1188 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1189 switch (task->tk_status) {
1190 case 0:
003707c7 1191 nfs_set_open_stateid(state, &calldata->res.stateid, calldata->arg.open_flags);
26e976a8 1192 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1193 break;
1194 case -NFS4ERR_STALE_STATEID:
1195 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1196 break;
1197 default:
1198 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1199 rpc_restart_call(task);
1200 return;
1201 }
1202 }
516a6af6 1203 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1204}
1205
4ce70ada 1206static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1207{
4ce70ada 1208 struct nfs4_closedata *calldata = data;
9512135d 1209 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1210 struct rpc_message msg = {
1211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1212 .rpc_argp = &calldata->arg,
1213 .rpc_resp = &calldata->res,
9512135d 1214 .rpc_cred = state->owner->so_cred,
1da177e4 1215 };
003707c7
TM		 1216 int clear_rd, clear_wr, clear_rdwr;
1217 int mode;
9512135d 1218
963d8fe5 1219 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1220 return;
003707c7
TM		 1221
1222 mode = FMODE_READ|FMODE_WRITE;
1223 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f
TM		 1224 spin_lock(&state->owner->so_lock);
1225 spin_lock(&calldata->inode->i_lock);
003707c7 1226 /* Calculate the change in open mode */
e7616923 1227 if (state->n_rdwr == 0) {
003707c7 1228 if (state->n_rdonly == 0) {
e7616923 1229 mode &= ~FMODE_READ;
003707c7
TM		 1230 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1231 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1232 }
1233 if (state->n_wronly == 0) {
e7616923 1234 mode &= ~FMODE_WRITE;
003707c7
TM		 1235 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1236 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1237 }
e7616923 1238 }
4cecb76f
TM		 1239 spin_unlock(&calldata->inode->i_lock);
1240 spin_unlock(&state->owner->so_lock);
003707c7 1241 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1242 /* Note: exit _without_ calling nfs4_close_done */
1243 task->tk_action = NULL;
9512135d
TM		 1244 return;
1245 }
516a6af6 1246 nfs_fattr_init(calldata->res.fattr);
9512135d 1247 if (mode != 0)
1da177e4 1248 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d 1249 calldata->arg.open_flags = mode;
26e976a8 1250 calldata->timestamp = jiffies;
9512135d 1251 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1252}
1253
963d8fe5 1254static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1255 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1256 .rpc_call_done = nfs4_close_done,
1257 .rpc_release = nfs4_free_closedata,
1258};
1259
1da177e4
LT		 1260/*
1261 * It is possible for data to be read/written from a mem-mapped file
1262 * after the sys_close call (which hits the vfs layer as a flush).
1263 * This means that we can't safely call nfsv4 close on a file until
1264 * the inode is cleared. This in turn means that we are not good
1265 * NFSv4 citizens - we do not indicate to the server to update the file's
1266 * share state even when we are done with one of the three share
1267 * stateid's in the inode.
1268 *
1269 * NOTE: Caller must be holding the sp->so_owner semaphore!
1270 */
4a35bd41 1271int nfs4_do_close(struct path *path, struct nfs4_state *state)
1da177e4 1272{
4a35bd41 1273 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1274 struct nfs4_closedata *calldata;
b39e625b
TM		 1275 struct nfs4_state_owner *sp = state->owner;
1276 struct rpc_task *task;
9512135d 1277 int status = -ENOMEM;
1da177e4 1278
9512135d 1279 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1280 if (calldata == NULL)
9512135d 1281 goto out;
4a35bd41 1282 calldata->inode = state->inode;
1da177e4 1283 calldata->state = state;
4a35bd41 1284 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1285 calldata->arg.stateid = &state->open_stateid;
1da177e4 1286 /* Serialization for the sequence id */
cee54fc9 1287 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1288 if (calldata->arg.seqid == NULL)
1289 goto out_free_calldata;
516a6af6
TM		 1290 calldata->arg.bitmask = server->attr_bitmask;
1291 calldata->res.fattr = &calldata->fattr;
1292 calldata->res.server = server;
4a35bd41
TM		 1293 calldata->path.mnt = mntget(path->mnt);
1294 calldata->path.dentry = dget(path->dentry);
9512135d 1295
b39e625b
TM		 1296 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1297 if (IS_ERR(task))
1298 return PTR_ERR(task);
1299 rpc_put_task(task);
1300 return 0;
9512135d
TM		 1301out_free_calldata:
1302 kfree(calldata);
1303out:
b39e625b
TM		 1304 nfs4_put_open_state(state);
1305 nfs4_put_state_owner(sp);
9512135d 1306 return status;
1da177e4
LT		 1307}
1308
4a35bd41 1309static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1310{
1311 struct file *filp;
1b45c46c 1312 int ret;
02a913a7 1313
1b45c46c
TM		 1314 /* If the open_intent is for execute, we have an extra check to make */
1315 if (nd->intent.open.flags & FMODE_EXEC) {
1316 ret = _nfs4_do_access(state->inode,
1317 state->owner->so_cred,
1318 nd->intent.open.flags);
1319 if (ret < 0)
1320 goto out_close;
1321 }
4a35bd41 1322 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1323 if (!IS_ERR(filp)) {
1324 struct nfs_open_context *ctx;
1325 ctx = (struct nfs_open_context *)filp->private_data;
1326 ctx->state = state;
95cf959b
TM		 1327 return 0;
1328 }
1b45c46c
TM		 1329 ret = PTR_ERR(filp);
1330out_close:
4a35bd41 1331 nfs4_close_state(path, state, nd->intent.open.flags);
1b45c46c 1332 return ret;
02a913a7
TM		 1333}
1334
1335struct dentry *
1da177e4
LT		 1336nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1337{
ad389da7
TM		 1338 struct path path = {
1339 .mnt = nd->mnt,
1340 .dentry = dentry,
1341 };
1da177e4
LT		 1342 struct iattr attr;
1343 struct rpc_cred *cred;
1344 struct nfs4_state *state;
02a913a7 1345 struct dentry *res;
1da177e4
LT		 1346
1347 if (nd->flags & LOOKUP_CREATE) {
1348 attr.ia_mode = nd->intent.open.create_mode;
1349 attr.ia_valid = ATTR_MODE;
1350 if (!IS_POSIXACL(dir))
1351 attr.ia_mode &= ~current->fs->umask;
1352 } else {
1353 attr.ia_valid = 0;
1354 BUG_ON(nd->intent.open.flags & O_CREAT);
1355 }
1356
1f163415 1357 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4 1358 if (IS_ERR(cred))
02a913a7 1359 return (struct dentry *)cred;
ad389da7 1360 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1361 put_rpccred(cred);
02a913a7
TM		 1362 if (IS_ERR(state)) {
1363 if (PTR_ERR(state) == -ENOENT)
1364 d_add(dentry, NULL);
1365 return (struct dentry *)state;
1366 }
24ac23ab 1367 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM		 1368 if (res != NULL)
1369 dentry = res;
4a35bd41 1370 nfs4_intent_set_file(nd, &path, state);
02a913a7 1371 return res;
1da177e4
LT		 1372}
1373
1374int
02a913a7 1375nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1376{
ad389da7
TM		 1377 struct path path = {
1378 .mnt = nd->mnt,
1379 .dentry = dentry,
1380 };
1da177e4
LT		 1381 struct rpc_cred *cred;
1382 struct nfs4_state *state;
1da177e4 1383
1f163415 1384 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1385 if (IS_ERR(cred))
1386 return PTR_ERR(cred);
1387 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1388 if (IS_ERR(state))
ad389da7 1389 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1390 put_rpccred(cred);
02a913a7
TM		 1391 if (IS_ERR(state)) {
1392 switch (PTR_ERR(state)) {
1393 case -EPERM:
1394 case -EACCES:
1395 case -EDQUOT:
1396 case -ENOSPC:
1397 case -EROFS:
1398 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1399 return 1;
b87c0adf
CL		 1400 default:
1401 goto out_drop;
02a913a7 1402 }
02a913a7 1403 }
24ac23ab 1404 if (state->inode == dentry->d_inode) {
4a35bd41 1405 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1406 return 1;
1407 }
4a35bd41 1408 nfs4_close_state(&path, state, openflags);
02a913a7
TM		 1409out_drop:
1410 d_drop(dentry);
1da177e4
LT		 1411 return 0;
1412}
1413
1414
1415static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1416{
1417 struct nfs4_server_caps_res res = {};
1418 struct rpc_message msg = {
1419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1420 .rpc_argp = fhandle,
1421 .rpc_resp = &res,
1422 };
1423 int status;
1424
1425 status = rpc_call_sync(server->client, &msg, 0);
1426 if (status == 0) {
1427 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1428 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1429 server->caps |= NFS_CAP_ACLS;
1430 if (res.has_links != 0)
1431 server->caps |= NFS_CAP_HARDLINKS;
1432 if (res.has_symlinks != 0)
1433 server->caps |= NFS_CAP_SYMLINKS;
1434 server->acl_bitmask = res.acl_bitmask;
1435 }
1436 return status;
1437}
1438
55a97593 1439int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1440{
1441 struct nfs4_exception exception = { };
1442 int err;
1443 do {
1444 err = nfs4_handle_exception(server,
1445 _nfs4_server_capabilities(server, fhandle),
1446 &exception);
1447 } while (exception.retry);
1448 return err;
1449}
1450
1451static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1452 struct nfs_fsinfo *info)
1453{
1da177e4
LT		 1454 struct nfs4_lookup_root_arg args = {
1455 .bitmask = nfs4_fattr_bitmap,
1456 };
1457 struct nfs4_lookup_res res = {
1458 .server = server,
0e574af1 1459 .fattr = info->fattr,
1da177e4
LT		 1460 .fh = fhandle,
1461 };
1462 struct rpc_message msg = {
1463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1464 .rpc_argp = &args,
1465 .rpc_resp = &res,
1466 };
0e574af1 1467 nfs_fattr_init(info->fattr);
1da177e4
LT		 1468 return rpc_call_sync(server->client, &msg, 0);
1469}
1470
1471static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1472 struct nfs_fsinfo *info)
1473{
1474 struct nfs4_exception exception = { };
1475 int err;
1476 do {
1477 err = nfs4_handle_exception(server,
1478 _nfs4_lookup_root(server, fhandle, info),
1479 &exception);
1480 } while (exception.retry);
1481 return err;
1482}
1483
54ceac45
DH		 1484/*
1485 * get the file handle for the "/" directory on the server
1486 */
1da177e4 1487static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1488 struct nfs_fsinfo *info)
1da177e4 1489{
1da177e4
LT		 1490 int status;
1491
1da177e4 1492 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1493 if (status == 0)
1494 status = nfs4_server_capabilities(server, fhandle);
1495 if (status == 0)
1496 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1497 return nfs4_map_errors(status);
1da177e4
LT		 1498}
1499
6b97fd3d
MN		 1500/*
1501 * Get locations and (maybe) other attributes of a referral.
1502 * Note that we'll actually follow the referral later when
1503 * we detect fsid mismatch in inode revalidation
1504 */
1505static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1506{
1507 int status = -ENOMEM;
1508 struct page *page = NULL;
1509 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1510
1511 page = alloc_page(GFP_KERNEL);
1512 if (page == NULL)
1513 goto out;
1514 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1515 if (locations == NULL)
1516 goto out;
1517
c228fd3a 1518 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1519 if (status != 0)
1520 goto out;
1521 /* Make sure server returned a different fsid for the referral */
1522 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1523 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1524 status = -EIO;
1525 goto out;
1526 }
1527
1528 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1529 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1530 if (!fattr->mode)
1531 fattr->mode = S_IFDIR;
1532 memset(fhandle, 0, sizeof(struct nfs_fh));
1533out:
1534 if (page)
1535 __free_page(page);
1536 if (locations)
1537 kfree(locations);
1538 return status;
1539}
1540
1da177e4
LT		 1541static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1542{
1543 struct nfs4_getattr_arg args = {
1544 .fh = fhandle,
1545 .bitmask = server->attr_bitmask,
1546 };
1547 struct nfs4_getattr_res res = {
1548 .fattr = fattr,
1549 .server = server,
1550 };
1551 struct rpc_message msg = {
1552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1553 .rpc_argp = &args,
1554 .rpc_resp = &res,
1555 };
1556
0e574af1 1557 nfs_fattr_init(fattr);
1da177e4
LT		 1558 return rpc_call_sync(server->client, &msg, 0);
1559}
1560
1561static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1562{
1563 struct nfs4_exception exception = { };
1564 int err;
1565 do {
1566 err = nfs4_handle_exception(server,
1567 _nfs4_proc_getattr(server, fhandle, fattr),
1568 &exception);
1569 } while (exception.retry);
1570 return err;
1571}
1572
1573/*
1574 * The file is not closed if it is opened due to the a request to change
1575 * the size of the file. The open call will not be needed once the
1576 * VFS layer lookup-intents are implemented.
1577 *
1578 * Close is called when the inode is destroyed.
1579 * If we haven't opened the file for O_WRONLY, we
1580 * need to in the size_change case to obtain a stateid.
1581 *
1582 * Got race?
1583 * Because OPEN is always done by name in nfsv4, it is
1584 * possible that we opened a different file by the same
1585 * name. We can recognize this race condition, but we
1586 * can't do anything about it besides returning an error.
1587 *
1588 * This will be fixed with VFS changes (lookup-intent).
1589 */
1590static int
1591nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1592 struct iattr *sattr)
1593{
08e9eac4
TM		 1594 struct rpc_cred *cred;
1595 struct inode *inode = dentry->d_inode;
d530838b
TM		 1596 struct nfs_open_context *ctx;
1597 struct nfs4_state *state = NULL;
1da177e4
LT		 1598 int status;
1599
0e574af1 1600 nfs_fattr_init(fattr);
1da177e4 1601
1f163415 1602 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM		 1603 if (IS_ERR(cred))
1604 return PTR_ERR(cred);
d530838b
TM		 1605
1606 /* Search for an existing open(O_WRITE) file */
1607 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1608 if (ctx != NULL)
1609 state = ctx->state;
08e9eac4 1610
3e4f6290 1611 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1612 if (status == 0)
1613 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1614 if (ctx != NULL)
1615 put_nfs_open_context(ctx);
08e9eac4 1616 put_rpccred(cred);
1da177e4
LT		 1617 return status;
1618}
1619
2b3de441
DH		 1620static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1621 struct qstr *name, struct nfs_fh *fhandle,
1622 struct nfs_fattr *fattr)
1623{
1624 int status;
1625 struct nfs4_lookup_arg args = {
1626 .bitmask = server->attr_bitmask,
1627 .dir_fh = dirfh,
1628 .name = name,
1629 };
1630 struct nfs4_lookup_res res = {
1631 .server = server,
1632 .fattr = fattr,
1633 .fh = fhandle,
1634 };
1635 struct rpc_message msg = {
1636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1637 .rpc_argp = &args,
1638 .rpc_resp = &res,
1639 };
1640
1641 nfs_fattr_init(fattr);
1642
1643 dprintk("NFS call lookupfh %s\n", name->name);
1644 status = rpc_call_sync(server->client, &msg, 0);
1645 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1646 return status;
1647}
1648
1649static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1650 struct qstr *name, struct nfs_fh *fhandle,
1651 struct nfs_fattr *fattr)
1652{
1653 struct nfs4_exception exception = { };
1654 int err;
1655 do {
4e56e082
TM		 1656 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1657 /* FIXME: !!!! */
1658 if (err == -NFS4ERR_MOVED) {
1659 err = -EREMOTE;
1660 break;
1661 }
1662 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1663 } while (exception.retry);
1664 return err;
1665}
1666
1da177e4
LT		 1667static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1668 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1669{
4e56e082 1670 int status;
1da177e4
LT		 1671
1672 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1673 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1674 if (status == -NFS4ERR_MOVED)
1675 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1676 dprintk("NFS reply lookup: %d\n", status);
1677 return status;
1678}
1679
1680static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1681{
1682 struct nfs4_exception exception = { };
1683 int err;
1684 do {
1685 err = nfs4_handle_exception(NFS_SERVER(dir),
1686 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1687 &exception);
1688 } while (exception.retry);
1689 return err;
1690}
1691
1692static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1693{
1694 struct nfs4_accessargs args = {
1695 .fh = NFS_FH(inode),
1696 };
1697 struct nfs4_accessres res = { 0 };
1698 struct rpc_message msg = {
1699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1700 .rpc_argp = &args,
1701 .rpc_resp = &res,
1702 .rpc_cred = entry->cred,
1703 };
1704 int mode = entry->mask;
1705 int status;
1706
1707 /*
1708 * Determine which access bits we want to ask for...
1709 */
1710 if (mode & MAY_READ)
1711 args.access |= NFS4_ACCESS_READ;
1712 if (S_ISDIR(inode->i_mode)) {
1713 if (mode & MAY_WRITE)
1714 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1715 if (mode & MAY_EXEC)
1716 args.access |= NFS4_ACCESS_LOOKUP;
1717 } else {
1718 if (mode & MAY_WRITE)
1719 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1720 if (mode & MAY_EXEC)
1721 args.access |= NFS4_ACCESS_EXECUTE;
1722 }
1723 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1724 if (!status) {
1725 entry->mask = 0;
1726 if (res.access & NFS4_ACCESS_READ)
1727 entry->mask |= MAY_READ;
1728 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1729 entry->mask |= MAY_WRITE;
1730 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1731 entry->mask |= MAY_EXEC;
1732 }
1733 return status;
1734}
1735
1736static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1737{
1738 struct nfs4_exception exception = { };
1739 int err;
1740 do {
1741 err = nfs4_handle_exception(NFS_SERVER(inode),
1742 _nfs4_proc_access(inode, entry),
1743 &exception);
1744 } while (exception.retry);
1745 return err;
1746}
1747
1748/*
1749 * TODO: For the time being, we don't try to get any attributes
1750 * along with any of the zero-copy operations READ, READDIR,
1751 * READLINK, WRITE.
1752 *
1753 * In the case of the first three, we want to put the GETATTR
1754 * after the read-type operation -- this is because it is hard
1755 * to predict the length of a GETATTR response in v4, and thus
1756 * align the READ data correctly. This means that the GETATTR
1757 * may end up partially falling into the page cache, and we should
1758 * shift it into the 'tail' of the xdr_buf before processing.
1759 * To do this efficiently, we need to know the total length
1760 * of data received, which doesn't seem to be available outside
1761 * of the RPC layer.
1762 *
1763 * In the case of WRITE, we also want to put the GETATTR after
1764 * the operation -- in this case because we want to make sure
1765 * we get the post-operation mtime and size. This means that
1766 * we can't use xdr_encode_pages() as written: we need a variant
1767 * of it which would leave room in the 'tail' iovec.
1768 *
1769 * Both of these changes to the XDR layer would in fact be quite
1770 * minor, but I decided to leave them for a subsequent patch.
1771 */
1772static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1773 unsigned int pgbase, unsigned int pglen)
1774{
1775 struct nfs4_readlink args = {
1776 .fh = NFS_FH(inode),
1777 .pgbase = pgbase,
1778 .pglen = pglen,
1779 .pages = &page,
1780 };
1781 struct rpc_message msg = {
1782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1783 .rpc_argp = &args,
1784 .rpc_resp = NULL,
1785 };
1786
1787 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1788}
1789
1790static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1791 unsigned int pgbase, unsigned int pglen)
1792{
1793 struct nfs4_exception exception = { };
1794 int err;
1795 do {
1796 err = nfs4_handle_exception(NFS_SERVER(inode),
1797 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1798 &exception);
1799 } while (exception.retry);
1800 return err;
1801}
1802
1da177e4
LT		 1803/*
1804 * Got race?
1805 * We will need to arrange for the VFS layer to provide an atomic open.
1806 * Until then, this create/open method is prone to inefficiency and race
1807 * conditions due to the lookup, create, and open VFS calls from sys_open()
1808 * placed on the wire.
1809 *
1810 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1811 * The file will be opened again in the subsequent VFS open call
1812 * (nfs4_proc_file_open).
1813 *
1814 * The open for read will just hang around to be used by any process that
1815 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1816 */
1817
1818static int
1819nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1820 int flags, struct nameidata *nd)
1da177e4 1821{
ad389da7
TM		 1822 struct path path = {
1823 .mnt = nd->mnt,
1824 .dentry = dentry,
1825 };
1da177e4
LT		 1826 struct nfs4_state *state;
1827 struct rpc_cred *cred;
1828 int status = 0;
1829
1f163415 1830 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1831 if (IS_ERR(cred)) {
1832 status = PTR_ERR(cred);
1833 goto out;
1834 }
ad389da7 1835 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4
LT		 1836 put_rpccred(cred);
1837 if (IS_ERR(state)) {
1838 status = PTR_ERR(state);
1839 goto out;
1840 }
24ac23ab 1841 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1842 if (flags & O_EXCL) {
1843 struct nfs_fattr fattr;
3e4f6290 1844 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1845 if (status == 0)
65e4308d 1846 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1847 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1848 }
ad389da7 1849 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1850 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1851 else
4a35bd41 1852 nfs4_close_state(&path, state, flags);
1da177e4
LT		 1853out:
1854 return status;
1855}
1856
1857static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1858{
16e42959 1859 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 1860 struct nfs4_remove_arg args = {
1861 .fh = NFS_FH(dir),
1862 .name = name,
16e42959
TM		 1863 .bitmask = server->attr_bitmask,
1864 };
1865 struct nfs_fattr dir_attr;
1866 struct nfs4_remove_res res = {
1867 .server = server,
1868 .dir_attr = &dir_attr,
1da177e4 1869 };
1da177e4
LT		 1870 struct rpc_message msg = {
1871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1872 .rpc_argp = &args,
1873 .rpc_resp = &res,
1874 };
1875 int status;
1876
16e42959
TM		 1877 nfs_fattr_init(res.dir_attr);
1878 status = rpc_call_sync(server->client, &msg, 0);
1879 if (status == 0) {
1880 update_changeattr(dir, &res.cinfo);
1881 nfs_post_op_update_inode(dir, res.dir_attr);
1882 }
1da177e4
LT		 1883 return status;
1884}
1885
1886static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1887{
1888 struct nfs4_exception exception = { };
1889 int err;
1890 do {
1891 err = nfs4_handle_exception(NFS_SERVER(dir),
1892 _nfs4_proc_remove(dir, name),
1893 &exception);
1894 } while (exception.retry);
1895 return err;
1896}
1897
1898struct unlink_desc {
1899 struct nfs4_remove_arg args;
16e42959
TM		 1900 struct nfs4_remove_res res;
1901 struct nfs_fattr dir_attr;
1da177e4
LT		 1902};
1903
1904static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1905 struct qstr *name)
1906{
16e42959 1907 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1da177e4
LT		 1908 struct unlink_desc *up;
1909
5cbded58 1910 up = kmalloc(sizeof(*up), GFP_KERNEL);
1da177e4
LT		 1911 if (!up)
1912 return -ENOMEM;
1913
1914 up->args.fh = NFS_FH(dir->d_inode);
1915 up->args.name = name;
16e42959
TM		 1916 up->args.bitmask = server->attr_bitmask;
1917 up->res.server = server;
1918 up->res.dir_attr = &up->dir_attr;
1da177e4
LT		 1919
1920 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1921 msg->rpc_argp = &up->args;
1922 msg->rpc_resp = &up->res;
1923 return 0;
1924}
1925
1926static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1927{
1928 struct rpc_message *msg = &task->tk_msg;
1929 struct unlink_desc *up;
1930
1931 if (msg->rpc_resp != NULL) {
1932 up = container_of(msg->rpc_resp, struct unlink_desc, res);
16e42959
TM		 1933 update_changeattr(dir->d_inode, &up->res.cinfo);
1934 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1da177e4
LT		 1935 kfree(up);
1936 msg->rpc_resp = NULL;
1937 msg->rpc_argp = NULL;
1938 }
1939 return 0;
1940}
1941
1942static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1943 struct inode *new_dir, struct qstr *new_name)
1944{
6caf2c82 1945 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1946 struct nfs4_rename_arg arg = {
1947 .old_dir = NFS_FH(old_dir),
1948 .new_dir = NFS_FH(new_dir),
1949 .old_name = old_name,
1950 .new_name = new_name,
6caf2c82
TM		 1951 .bitmask = server->attr_bitmask,
1952 };
1953 struct nfs_fattr old_fattr, new_fattr;
1954 struct nfs4_rename_res res = {
1955 .server = server,
1956 .old_fattr = &old_fattr,
1957 .new_fattr = &new_fattr,
1da177e4 1958 };
1da177e4
LT		 1959 struct rpc_message msg = {
1960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1961 .rpc_argp = &arg,
1962 .rpc_resp = &res,
1963 };
1964 int status;
1965
6caf2c82
TM		 1966 nfs_fattr_init(res.old_fattr);
1967 nfs_fattr_init(res.new_fattr);
1968 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 1969
1970 if (!status) {
1971 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 1972 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 1973 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 1974 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 1975 }
1976 return status;
1977}
1978
1979static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1980 struct inode *new_dir, struct qstr *new_name)
1981{
1982 struct nfs4_exception exception = { };
1983 int err;
1984 do {
1985 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1986 _nfs4_proc_rename(old_dir, old_name,
1987 new_dir, new_name),
1988 &exception);
1989 } while (exception.retry);
1990 return err;
1991}
1992
1993static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1994{
91ba2eee 1995 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1996 struct nfs4_link_arg arg = {
1997 .fh = NFS_FH(inode),
1998 .dir_fh = NFS_FH(dir),
1999 .name = name,
91ba2eee
TM		 2000 .bitmask = server->attr_bitmask,
2001 };
2002 struct nfs_fattr fattr, dir_attr;
2003 struct nfs4_link_res res = {
2004 .server = server,
2005 .fattr = &fattr,
2006 .dir_attr = &dir_attr,
1da177e4 2007 };
1da177e4
LT		 2008 struct rpc_message msg = {
2009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2010 .rpc_argp = &arg,
91ba2eee 2011 .rpc_resp = &res,
1da177e4
LT		 2012 };
2013 int status;
2014
91ba2eee
TM		 2015 nfs_fattr_init(res.fattr);
2016 nfs_fattr_init(res.dir_attr);
2017 status = rpc_call_sync(server->client, &msg, 0);
2018 if (!status) {
2019 update_changeattr(dir, &res.cinfo);
2020 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2021 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2022 }
1da177e4
LT		 2023
2024 return status;
2025}
2026
2027static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2028{
2029 struct nfs4_exception exception = { };
2030 int err;
2031 do {
2032 err = nfs4_handle_exception(NFS_SERVER(inode),
2033 _nfs4_proc_link(inode, dir, name),
2034 &exception);
2035 } while (exception.retry);
2036 return err;
2037}
2038
4f390c15 2039static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2040 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2041{
2042 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2043 struct nfs_fh fhandle;
2044 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2045 struct nfs4_create_arg arg = {
2046 .dir_fh = NFS_FH(dir),
2047 .server = server,
4f390c15 2048 .name = &dentry->d_name,
1da177e4
LT		 2049 .attrs = sattr,
2050 .ftype = NF4LNK,
2051 .bitmask = server->attr_bitmask,
2052 };
2053 struct nfs4_create_res res = {
2054 .server = server,
4f390c15
CL		 2055 .fh = &fhandle,
2056 .fattr = &fattr,
56ae19f3 2057 .dir_fattr = &dir_fattr,
1da177e4
LT		 2058 };
2059 struct rpc_message msg = {
2060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2061 .rpc_argp = &arg,
2062 .rpc_resp = &res,
2063 };
2064 int status;
2065
94a6d753 2066 if (len > NFS4_MAXPATHLEN)
1da177e4 2067 return -ENAMETOOLONG;
4f390c15 2068
94a6d753
CL		 2069 arg.u.symlink.pages = &page;
2070 arg.u.symlink.len = len;
4f390c15 2071 nfs_fattr_init(&fattr);
56ae19f3 2072 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2073
2074 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2075 if (!status) {
1da177e4 2076 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2077 nfs_post_op_update_inode(dir, res.dir_fattr);
2078 status = nfs_instantiate(dentry, &fhandle, &fattr);
2079 }
1da177e4
LT		 2080 return status;
2081}
2082
4f390c15 2083static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2084 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2085{
2086 struct nfs4_exception exception = { };
2087 int err;
2088 do {
2089 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2090 _nfs4_proc_symlink(dir, dentry, page,
2091 len, sattr),
1da177e4
LT		 2092 &exception);
2093 } while (exception.retry);
2094 return err;
2095}
2096
2097static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2098 struct iattr *sattr)
2099{
2100 struct nfs_server *server = NFS_SERVER(dir);
2101 struct nfs_fh fhandle;
56ae19f3 2102 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2103 struct nfs4_create_arg arg = {
2104 .dir_fh = NFS_FH(dir),
2105 .server = server,
2106 .name = &dentry->d_name,
2107 .attrs = sattr,
2108 .ftype = NF4DIR,
2109 .bitmask = server->attr_bitmask,
2110 };
2111 struct nfs4_create_res res = {
2112 .server = server,
2113 .fh = &fhandle,
2114 .fattr = &fattr,
56ae19f3 2115 .dir_fattr = &dir_fattr,
1da177e4
LT		 2116 };
2117 struct rpc_message msg = {
2118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2119 .rpc_argp = &arg,
2120 .rpc_resp = &res,
2121 };
2122 int status;
2123
0e574af1 2124 nfs_fattr_init(&fattr);
56ae19f3 2125 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2126
2127 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2128 if (!status) {
2129 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2130 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2131 status = nfs_instantiate(dentry, &fhandle, &fattr);
2132 }
2133 return status;
2134}
2135
2136static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2137 struct iattr *sattr)
2138{
2139 struct nfs4_exception exception = { };
2140 int err;
2141 do {
2142 err = nfs4_handle_exception(NFS_SERVER(dir),
2143 _nfs4_proc_mkdir(dir, dentry, sattr),
2144 &exception);
2145 } while (exception.retry);
2146 return err;
2147}
2148
2149static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2150 u64 cookie, struct page *page, unsigned int count, int plus)
2151{
2152 struct inode *dir = dentry->d_inode;
2153 struct nfs4_readdir_arg args = {
2154 .fh = NFS_FH(dir),
2155 .pages = &page,
2156 .pgbase = 0,
2157 .count = count,
2158 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2159 };
2160 struct nfs4_readdir_res res;
2161 struct rpc_message msg = {
2162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2163 .rpc_argp = &args,
2164 .rpc_resp = &res,
2165 .rpc_cred = cred,
2166 };
2167 int status;
2168
eadf4598
TM		 2169 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2170 dentry->d_parent->d_name.name,
2171 dentry->d_name.name,
2172 (unsigned long long)cookie);
1da177e4
LT		 2173 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2174 res.pgbase = args.pgbase;
2175 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2176 if (status == 0)
2177 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
eadf4598 2178 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2179 return status;
2180}
2181
2182static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2183 u64 cookie, struct page *page, unsigned int count, int plus)
2184{
2185 struct nfs4_exception exception = { };
2186 int err;
2187 do {
2188 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2189 _nfs4_proc_readdir(dentry, cred, cookie,
2190 page, count, plus),
2191 &exception);
2192 } while (exception.retry);
2193 return err;
2194}
2195
2196static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2197 struct iattr *sattr, dev_t rdev)
2198{
2199 struct nfs_server *server = NFS_SERVER(dir);
2200 struct nfs_fh fh;
56ae19f3 2201 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2202 struct nfs4_create_arg arg = {
2203 .dir_fh = NFS_FH(dir),
2204 .server = server,
2205 .name = &dentry->d_name,
2206 .attrs = sattr,
2207 .bitmask = server->attr_bitmask,
2208 };
2209 struct nfs4_create_res res = {
2210 .server = server,
2211 .fh = &fh,
2212 .fattr = &fattr,
56ae19f3 2213 .dir_fattr = &dir_fattr,
1da177e4
LT		 2214 };
2215 struct rpc_message msg = {
2216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2217 .rpc_argp = &arg,
2218 .rpc_resp = &res,
2219 };
2220 int status;
2221 int mode = sattr->ia_mode;
2222
0e574af1 2223 nfs_fattr_init(&fattr);
56ae19f3 2224 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2225
2226 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2227 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2228 if (S_ISFIFO(mode))
2229 arg.ftype = NF4FIFO;
2230 else if (S_ISBLK(mode)) {
2231 arg.ftype = NF4BLK;
2232 arg.u.device.specdata1 = MAJOR(rdev);
2233 arg.u.device.specdata2 = MINOR(rdev);
2234 }
2235 else if (S_ISCHR(mode)) {
2236 arg.ftype = NF4CHR;
2237 arg.u.device.specdata1 = MAJOR(rdev);
2238 arg.u.device.specdata2 = MINOR(rdev);
2239 }
2240 else
2241 arg.ftype = NF4SOCK;
2242
2243 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2244 if (status == 0) {
2245 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2246 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2247 status = nfs_instantiate(dentry, &fh, &fattr);
2248 }
2249 return status;
2250}
2251
2252static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2253 struct iattr *sattr, dev_t rdev)
2254{
2255 struct nfs4_exception exception = { };
2256 int err;
2257 do {
2258 err = nfs4_handle_exception(NFS_SERVER(dir),
2259 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2260 &exception);
2261 } while (exception.retry);
2262 return err;
2263}
2264
2265static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2266 struct nfs_fsstat *fsstat)
2267{
2268 struct nfs4_statfs_arg args = {
2269 .fh = fhandle,
2270 .bitmask = server->attr_bitmask,
2271 };
2272 struct rpc_message msg = {
2273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2274 .rpc_argp = &args,
2275 .rpc_resp = fsstat,
2276 };
2277
0e574af1 2278 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2279 return rpc_call_sync(server->client, &msg, 0);
2280}
2281
2282static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2283{
2284 struct nfs4_exception exception = { };
2285 int err;
2286 do {
2287 err = nfs4_handle_exception(server,
2288 _nfs4_proc_statfs(server, fhandle, fsstat),
2289 &exception);
2290 } while (exception.retry);
2291 return err;
2292}
2293
2294static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2295 struct nfs_fsinfo *fsinfo)
2296{
2297 struct nfs4_fsinfo_arg args = {
2298 .fh = fhandle,
2299 .bitmask = server->attr_bitmask,
2300 };
2301 struct rpc_message msg = {
2302 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2303 .rpc_argp = &args,
2304 .rpc_resp = fsinfo,
2305 };
2306
2307 return rpc_call_sync(server->client, &msg, 0);
2308}
2309
2310static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2311{
2312 struct nfs4_exception exception = { };
2313 int err;
2314
2315 do {
2316 err = nfs4_handle_exception(server,
2317 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2318 &exception);
2319 } while (exception.retry);
2320 return err;
2321}
2322
2323static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2324{
0e574af1 2325 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2326 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2327}
2328
2329static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2330 struct nfs_pathconf *pathconf)
2331{
2332 struct nfs4_pathconf_arg args = {
2333 .fh = fhandle,
2334 .bitmask = server->attr_bitmask,
2335 };
2336 struct rpc_message msg = {
2337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2338 .rpc_argp = &args,
2339 .rpc_resp = pathconf,
2340 };
2341
2342 /* None of the pathconf attributes are mandatory to implement */
2343 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2344 memset(pathconf, 0, sizeof(*pathconf));
2345 return 0;
2346 }
2347
0e574af1 2348 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2349 return rpc_call_sync(server->client, &msg, 0);
2350}
2351
2352static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2353 struct nfs_pathconf *pathconf)
2354{
2355 struct nfs4_exception exception = { };
2356 int err;
2357
2358 do {
2359 err = nfs4_handle_exception(server,
2360 _nfs4_proc_pathconf(server, fhandle, pathconf),
2361 &exception);
2362 } while (exception.retry);
2363 return err;
2364}
2365
ec06c096 2366static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2367{
ec06c096 2368 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2369
ec06c096 2370 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2371 rpc_restart_call(task);
ec06c096 2372 return -EAGAIN;
1da177e4
LT		 2373 }
2374 if (task->tk_status > 0)
ec06c096
TM		 2375 renew_lease(server, data->timestamp);
2376 return 0;
1da177e4
LT		 2377}
2378
ec06c096 2379static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2380{
1da177e4
LT		 2381 struct rpc_message msg = {
2382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2383 .rpc_argp = &data->args,
2384 .rpc_resp = &data->res,
2385 .rpc_cred = data->cred,
2386 };
1da177e4
LT		 2387
2388 data->timestamp = jiffies;
2389
ec06c096 2390 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2391}
2392
788e7a89 2393static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2394{
1da177e4
LT		 2395 struct inode *inode = data->inode;
2396
2397 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2398 rpc_restart_call(task);
788e7a89 2399 return -EAGAIN;
1da177e4 2400 }
4f9838c7 2401 if (task->tk_status >= 0) {
1da177e4 2402 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2403 nfs_post_op_update_inode(inode, data->res.fattr);
2404 }
788e7a89 2405 return 0;
1da177e4
LT		 2406}
2407
788e7a89 2408static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2409{
1da177e4
LT		 2410 struct rpc_message msg = {
2411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2412 .rpc_argp = &data->args,
2413 .rpc_resp = &data->res,
2414 .rpc_cred = data->cred,
2415 };
2416 struct inode *inode = data->inode;
4f9838c7 2417 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2418 int stable;
1da177e4
LT		 2419
2420 if (how & FLUSH_STABLE) {
2421 if (!NFS_I(inode)->ncommit)
2422 stable = NFS_FILE_SYNC;
2423 else
2424 stable = NFS_DATA_SYNC;
2425 } else
2426 stable = NFS_UNSTABLE;
2427 data->args.stable = stable;
4f9838c7
TM		 2428 data->args.bitmask = server->attr_bitmask;
2429 data->res.server = server;
1da177e4
LT		 2430
2431 data->timestamp = jiffies;
2432
1da177e4 2433 /* Finalize the task. */
788e7a89 2434 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2435}
2436
788e7a89 2437static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2438{
1da177e4
LT		 2439 struct inode *inode = data->inode;
2440
2441 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2442 rpc_restart_call(task);
788e7a89 2443 return -EAGAIN;
1da177e4 2444 }
4f9838c7
TM		 2445 if (task->tk_status >= 0)
2446 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2447 return 0;
1da177e4
LT		 2448}
2449
788e7a89 2450static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2451{
1da177e4
LT		 2452 struct rpc_message msg = {
2453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2454 .rpc_argp = &data->args,
2455 .rpc_resp = &data->res,
2456 .rpc_cred = data->cred,
2457 };
788e7a89 2458 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2459
4f9838c7
TM		 2460 data->args.bitmask = server->attr_bitmask;
2461 data->res.server = server;
2462
788e7a89 2463 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2464}
2465
2466/*
2467 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2468 * standalone procedure for queueing an asynchronous RENEW.
2469 */
963d8fe5 2470static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2471{
adfa6f98 2472 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2473 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2474
2475 if (task->tk_status < 0) {
2476 switch (task->tk_status) {
2477 case -NFS4ERR_STALE_CLIENTID:
2478 case -NFS4ERR_EXPIRED:
2479 case -NFS4ERR_CB_PATH_DOWN:
2480 nfs4_schedule_state_recovery(clp);
2481 }
2482 return;
2483 }
2484 spin_lock(&clp->cl_lock);
2485 if (time_before(clp->cl_last_renewal,timestamp))
2486 clp->cl_last_renewal = timestamp;
2487 spin_unlock(&clp->cl_lock);
2488}
2489
963d8fe5
TM		 2490static const struct rpc_call_ops nfs4_renew_ops = {
2491 .rpc_call_done = nfs4_renew_done,
2492};
2493
adfa6f98 2494int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2495{
2496 struct rpc_message msg = {
2497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2498 .rpc_argp = clp,
b4454fe1 2499 .rpc_cred = cred,
1da177e4
LT		 2500 };
2501
2502 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2503 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2504}
2505
adfa6f98 2506int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2507{
2508 struct rpc_message msg = {
2509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2510 .rpc_argp = clp,
b4454fe1 2511 .rpc_cred = cred,
1da177e4
LT		 2512 };
2513 unsigned long now = jiffies;
2514 int status;
2515
2516 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2517 if (status < 0)
2518 return status;
2519 spin_lock(&clp->cl_lock);
2520 if (time_before(clp->cl_last_renewal,now))
2521 clp->cl_last_renewal = now;
2522 spin_unlock(&clp->cl_lock);
2523 return 0;
2524}
2525
aa1870af
BF		 2526static inline int nfs4_server_supports_acls(struct nfs_server *server)
2527{
2528 return (server->caps & NFS_CAP_ACLS)
2529 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2530 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2531}
2532
2533/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2534 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2535 * the stack.
2536 */
2537#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2538
2539static void buf_to_pages(const void *buf, size_t buflen,
2540 struct page **pages, unsigned int *pgbase)
2541{
2542 const void *p = buf;
2543
2544 *pgbase = offset_in_page(buf);
2545 p -= *pgbase;
2546 while (p < buf + buflen) {
2547 *(pages++) = virt_to_page(p);
2548 p += PAGE_CACHE_SIZE;
2549 }
2550}
2551
e50a1c2e
BF		 2552struct nfs4_cached_acl {
2553 int cached;
2554 size_t len;
3e9d4154 2555 char data[0];
e50a1c2e
BF		 2556};
2557
2558static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2559{
2560 struct nfs_inode *nfsi = NFS_I(inode);
2561
2562 spin_lock(&inode->i_lock);
2563 kfree(nfsi->nfs4_acl);
2564 nfsi->nfs4_acl = acl;
2565 spin_unlock(&inode->i_lock);
2566}
2567
2568static void nfs4_zap_acl_attr(struct inode *inode)
2569{
2570 nfs4_set_cached_acl(inode, NULL);
2571}
2572
2573static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2574{
2575 struct nfs_inode *nfsi = NFS_I(inode);
2576 struct nfs4_cached_acl *acl;
2577 int ret = -ENOENT;
2578
2579 spin_lock(&inode->i_lock);
2580 acl = nfsi->nfs4_acl;
2581 if (acl == NULL)
2582 goto out;
2583 if (buf == NULL) /* user is just asking for length */
2584 goto out_len;
2585 if (acl->cached == 0)
2586 goto out;
2587 ret = -ERANGE; /* see getxattr(2) man page */
2588 if (acl->len > buflen)
2589 goto out;
2590 memcpy(buf, acl->data, acl->len);
2591out_len:
2592 ret = acl->len;
2593out:
2594 spin_unlock(&inode->i_lock);
2595 return ret;
2596}
2597
2598static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2599{
2600 struct nfs4_cached_acl *acl;
2601
2602 if (buf && acl_len <= PAGE_SIZE) {
2603 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2604 if (acl == NULL)
2605 goto out;
2606 acl->cached = 1;
2607 memcpy(acl->data, buf, acl_len);
2608 } else {
2609 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2610 if (acl == NULL)
2611 goto out;
2612 acl->cached = 0;
2613 }
2614 acl->len = acl_len;
2615out:
2616 nfs4_set_cached_acl(inode, acl);
2617}
2618
16b4289c 2619static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2620{
aa1870af
BF		 2621 struct page *pages[NFS4ACL_MAXPAGES];
2622 struct nfs_getaclargs args = {
2623 .fh = NFS_FH(inode),
2624 .acl_pages = pages,
2625 .acl_len = buflen,
2626 };
2627 size_t resp_len = buflen;
e50a1c2e 2628 void *resp_buf;
aa1870af
BF		 2629 struct rpc_message msg = {
2630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2631 .rpc_argp = &args,
2632 .rpc_resp = &resp_len,
2633 };
e50a1c2e 2634 struct page *localpage = NULL;
aa1870af
BF		 2635 int ret;
2636
e50a1c2e
BF		 2637 if (buflen < PAGE_SIZE) {
2638 /* As long as we're doing a round trip to the server anyway,
2639 * let's be prepared for a page of acl data. */
2640 localpage = alloc_page(GFP_KERNEL);
2641 resp_buf = page_address(localpage);
2642 if (localpage == NULL)
2643 return -ENOMEM;
2644 args.acl_pages[0] = localpage;
2645 args.acl_pgbase = 0;
1d95db8e 2646 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2647 } else {
2648 resp_buf = buf;
2649 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2650 }
aa1870af 2651 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2652 if (ret)
2653 goto out_free;
2654 if (resp_len > args.acl_len)
2655 nfs4_write_cached_acl(inode, NULL, resp_len);
2656 else
2657 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2658 if (buf) {
2659 ret = -ERANGE;
2660 if (resp_len > buflen)
2661 goto out_free;
2662 if (localpage)
2663 memcpy(buf, resp_buf, resp_len);
2664 }
2665 ret = resp_len;
2666out_free:
2667 if (localpage)
2668 __free_page(localpage);
aa1870af
BF		 2669 return ret;
2670}
2671
16b4289c
TM		 2672static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2673{
2674 struct nfs4_exception exception = { };
2675 ssize_t ret;
2676 do {
2677 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2678 if (ret >= 0)
2679 break;
2680 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2681 } while (exception.retry);
2682 return ret;
2683}
2684
e50a1c2e
BF		 2685static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2686{
2687 struct nfs_server *server = NFS_SERVER(inode);
2688 int ret;
2689
2690 if (!nfs4_server_supports_acls(server))
2691 return -EOPNOTSUPP;
2692 ret = nfs_revalidate_inode(server, inode);
2693 if (ret < 0)
2694 return ret;
2695 ret = nfs4_read_cached_acl(inode, buf, buflen);
2696 if (ret != -ENOENT)
2697 return ret;
2698 return nfs4_get_acl_uncached(inode, buf, buflen);
2699}
2700
16b4289c 2701static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2702{
2703 struct nfs_server *server = NFS_SERVER(inode);
2704 struct page *pages[NFS4ACL_MAXPAGES];
2705 struct nfs_setaclargs arg = {
2706 .fh = NFS_FH(inode),
2707 .acl_pages = pages,
2708 .acl_len = buflen,
2709 };
2710 struct rpc_message msg = {
2711 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2712 .rpc_argp = &arg,
2713 .rpc_resp = NULL,
2714 };
2715 int ret;
2716
2717 if (!nfs4_server_supports_acls(server))
2718 return -EOPNOTSUPP;
642ac549 2719 nfs_inode_return_delegation(inode);
4b580ee3 2720 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2721 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2722 nfs_zap_caches(inode);
4b580ee3
BF		 2723 return ret;
2724}
2725
16b4289c
TM		 2726static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2727{
2728 struct nfs4_exception exception = { };
2729 int err;
2730 do {
2731 err = nfs4_handle_exception(NFS_SERVER(inode),
2732 __nfs4_proc_set_acl(inode, buf, buflen),
2733 &exception);
2734 } while (exception.retry);
2735 return err;
2736}
2737
1da177e4 2738static int
faf5f49c 2739nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2740{
7539bbab 2741 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2742
2743 if (!clp || task->tk_status >= 0)
2744 return 0;
2745 switch(task->tk_status) {
2746 case -NFS4ERR_STALE_CLIENTID:
2747 case -NFS4ERR_STALE_STATEID:
2748 case -NFS4ERR_EXPIRED:
2749 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2750 nfs4_schedule_state_recovery(clp);
433fbe4c 2751 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2752 rpc_wake_up_task(task);
2753 task->tk_status = 0;
2754 return -EAGAIN;
1da177e4 2755 case -NFS4ERR_DELAY:
006ea73e
CL		 2756 nfs_inc_server_stats((struct nfs_server *) server,
2757 NFSIOS_DELAY);
2758 case -NFS4ERR_GRACE:
1da177e4
LT		 2759 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2760 task->tk_status = 0;
2761 return -EAGAIN;
2762 case -NFS4ERR_OLD_STATEID:
2763 task->tk_status = 0;
2764 return -EAGAIN;
2765 }
2766 task->tk_status = nfs4_map_errors(task->tk_status);
2767 return 0;
2768}
2769
433fbe4c
TM		 2770static int nfs4_wait_bit_interruptible(void *word)
2771{
2772 if (signal_pending(current))
2773 return -ERESTARTSYS;
2774 schedule();
2775 return 0;
2776}
2777
adfa6f98 2778static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2779{
1da177e4 2780 sigset_t oldset;
433fbe4c 2781 int res;
1da177e4
LT		 2782
2783 might_sleep();
2784
e148582e
TM		 2785 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2786
1da177e4 2787 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2788 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2789 nfs4_wait_bit_interruptible,
2790 TASK_INTERRUPTIBLE);
1da177e4 2791 rpc_clnt_sigunmask(clnt, &oldset);
e148582e
TM		 2792
2793 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2794 return res;
2795}
2796
2797static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2798{
2799 sigset_t oldset;
2800 int res = 0;
2801
2802 might_sleep();
2803
2804 if (*timeout <= 0)
2805 *timeout = NFS4_POLL_RETRY_MIN;
2806 if (*timeout > NFS4_POLL_RETRY_MAX)
2807 *timeout = NFS4_POLL_RETRY_MAX;
2808 rpc_clnt_sigmask(clnt, &oldset);
2809 if (clnt->cl_intr) {
041e0e3b 2810 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2811 if (signalled())
2812 res = -ERESTARTSYS;
041e0e3b
NA		 2813 } else
2814 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2815 rpc_clnt_sigunmask(clnt, &oldset);
2816 *timeout <<= 1;
2817 return res;
2818}
2819
2820/* This is the error handling routine for processes that are allowed
2821 * to sleep.
2822 */
10afec90 2823static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2824{
7539bbab 2825 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2826 int ret = errorcode;
2827
2828 exception->retry = 0;
2829 switch(errorcode) {
2830 case 0:
2831 return 0;
2832 case -NFS4ERR_STALE_CLIENTID:
2833 case -NFS4ERR_STALE_STATEID:
2834 case -NFS4ERR_EXPIRED:
433fbe4c 2835 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2836 ret = nfs4_wait_clnt_recover(server->client, clp);
2837 if (ret == 0)
2838 exception->retry = 1;
2839 break;
c514983d 2840 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2841 case -NFS4ERR_GRACE:
2842 case -NFS4ERR_DELAY:
2843 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2844 if (ret != 0)
2845 break;
1da177e4 2846 case -NFS4ERR_OLD_STATEID:
2c56617d 2847 exception->retry = 1;
1da177e4
LT		 2848 }
2849 /* We failed to handle the error */
2850 return nfs4_map_errors(ret);
2851}
2852
adfa6f98 2853int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2854{
2855 nfs4_verifier sc_verifier;
2856 struct nfs4_setclientid setclientid = {
2857 .sc_verifier = &sc_verifier,
2858 .sc_prog = program,
2859 };
2860 struct rpc_message msg = {
2861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2862 .rpc_argp = &setclientid,
2863 .rpc_resp = clp,
286d7d6a 2864 .rpc_cred = cred,
1da177e4 2865 };
bc4785cd 2866 __be32 *p;
1da177e4
LT		 2867 int loop = 0;
2868 int status;
2869
bc4785cd 2870 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2871 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2872 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2873
2874 for(;;) {
2875 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2876 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
24c8dbbb 2877 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
286d7d6a 2878 cred->cr_ops->cr_name,
1da177e4
LT		 2879 clp->cl_id_uniquifier);
2880 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2881 sizeof(setclientid.sc_netid), "tcp");
2882 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2883 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2884 clp->cl_ipaddr, port >> 8, port & 255);
2885
2886 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2887 if (status != -NFS4ERR_CLID_INUSE)
2888 break;
2889 if (signalled())
2890 break;
2891 if (loop++ & 1)
2892 ssleep(clp->cl_lease_time + 1);
2893 else
2894 if (++clp->cl_id_uniquifier == 0)
2895 break;
2896 }
2897 return status;
2898}
2899
adfa6f98 2900static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2901{
2902 struct nfs_fsinfo fsinfo;
2903 struct rpc_message msg = {
2904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2905 .rpc_argp = clp,
2906 .rpc_resp = &fsinfo,
286d7d6a 2907 .rpc_cred = cred,
1da177e4
LT		 2908 };
2909 unsigned long now;
2910 int status;
2911
2912 now = jiffies;
2913 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2914 if (status == 0) {
2915 spin_lock(&clp->cl_lock);
2916 clp->cl_lease_time = fsinfo.lease_time * HZ;
2917 clp->cl_last_renewal = now;
58d9714a 2918 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2919 spin_unlock(&clp->cl_lock);
2920 }
2921 return status;
2922}
2923
adfa6f98 2924int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2925{
2926 long timeout;
2927 int err;
2928 do {
2929 err = _nfs4_proc_setclientid_confirm(clp, cred);
2930 switch (err) {
2931 case 0:
2932 return err;
2933 case -NFS4ERR_RESOURCE:
2934 /* The IBM lawyers misread another document! */
2935 case -NFS4ERR_DELAY:
2936 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2937 }
2938 } while (err == 0);
2939 return err;
2940}
2941
fe650407
TM		 2942struct nfs4_delegreturndata {
2943 struct nfs4_delegreturnargs args;
fa178f29 2944 struct nfs4_delegreturnres res;
fe650407
TM		 2945 struct nfs_fh fh;
2946 nfs4_stateid stateid;
2947 struct rpc_cred *cred;
26e976a8 2948 unsigned long timestamp;
fa178f29 2949 struct nfs_fattr fattr;
fe650407
TM		 2950 int rpc_status;
2951};
2952
2953static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2954{
fe650407 2955 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 2956 struct rpc_message msg = {
2957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 2958 .rpc_argp = &data->args,
fa178f29 2959 .rpc_resp = &data->res,
fe650407 2960 .rpc_cred = data->cred,
1da177e4 2961 };
fa178f29 2962 nfs_fattr_init(data->res.fattr);
fe650407
TM		 2963 rpc_call_setup(task, &msg, 0);
2964}
1da177e4 2965
fe650407
TM		 2966static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2967{
2968 struct nfs4_delegreturndata *data = calldata;
2969 data->rpc_status = task->tk_status;
26e976a8 2970 if (data->rpc_status == 0)
fa178f29 2971 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2972}
2973
2974static void nfs4_delegreturn_release(void *calldata)
2975{
2976 struct nfs4_delegreturndata *data = calldata;
2977
2978 put_rpccred(data->cred);
2979 kfree(calldata);
2980}
2981
c8d149f3 2982static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2983 .rpc_call_prepare = nfs4_delegreturn_prepare,
2984 .rpc_call_done = nfs4_delegreturn_done,
2985 .rpc_release = nfs4_delegreturn_release,
2986};
2987
2988static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2989{
2990 struct nfs4_delegreturndata *data;
fa178f29 2991 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 2992 struct rpc_task *task;
2993 int status;
2994
2995 data = kmalloc(sizeof(*data), GFP_KERNEL);
2996 if (data == NULL)
2997 return -ENOMEM;
2998 data->args.fhandle = &data->fh;
2999 data->args.stateid = &data->stateid;
fa178f29 3000 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3001 nfs_copy_fh(&data->fh, NFS_FH(inode));
3002 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3003 data->res.fattr = &data->fattr;
3004 data->res.server = server;
fe650407 3005 data->cred = get_rpccred(cred);
26e976a8 3006 data->timestamp = jiffies;
fe650407
TM		 3007 data->rpc_status = 0;
3008
3009 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 3010 if (IS_ERR(task))
fe650407 3011 return PTR_ERR(task);
fe650407 3012 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 3013 if (status == 0) {
fe650407 3014 status = data->rpc_status;
fa178f29
TM		 3015 if (status == 0)
3016 nfs_post_op_update_inode(inode, &data->fattr);
3017 }
e6b3c4db 3018 rpc_put_task(task);
fe650407 3019 return status;
1da177e4
LT		 3020}
3021
3022int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3023{
3024 struct nfs_server *server = NFS_SERVER(inode);
3025 struct nfs4_exception exception = { };
3026 int err;
3027 do {
3028 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3029 switch (err) {
3030 case -NFS4ERR_STALE_STATEID:
3031 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3032 case 0:
3033 return 0;
3034 }
3035 err = nfs4_handle_exception(server, err, &exception);
3036 } while (exception.retry);
3037 return err;
3038}
3039
3040#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3041#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3042
3043/*
3044 * sleep, with exponential backoff, and retry the LOCK operation.
3045 */
3046static unsigned long
3047nfs4_set_lock_task_retry(unsigned long timeout)
3048{
041e0e3b 3049 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3050 timeout <<= 1;
3051 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3052 return NFS4_LOCK_MAXTIMEOUT;
3053 return timeout;
3054}
3055
1da177e4
LT		 3056static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3057{
3058 struct inode *inode = state->inode;
3059 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3060 struct nfs_client *clp = server->nfs_client;
911d1aaf 3061 struct nfs_lockt_args arg = {
1da177e4 3062 .fh = NFS_FH(inode),
911d1aaf 3063 .fl = request,
1da177e4 3064 };
911d1aaf
TM		 3065 struct nfs_lockt_res res = {
3066 .denied = request,
1da177e4
LT		 3067 };
3068 struct rpc_message msg = {
3069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3070 .rpc_argp = &arg,
3071 .rpc_resp = &res,
3072 .rpc_cred = state->owner->so_cred,
3073 };
1da177e4
LT		 3074 struct nfs4_lock_state *lsp;
3075 int status;
3076
3077 down_read(&clp->cl_sem);
911d1aaf 3078 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3079 status = nfs4_set_lock_state(state, request);
3080 if (status != 0)
3081 goto out;
3082 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3083 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3084 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3085 switch (status) {
3086 case 0:
3087 request->fl_type = F_UNLCK;
3088 break;
3089 case -NFS4ERR_DENIED:
3090 status = 0;
1da177e4 3091 }
70cc6487 3092 request->fl_ops->fl_release_private(request);
8d0a8a9d 3093out:
1da177e4
LT		 3094 up_read(&clp->cl_sem);
3095 return status;
3096}
3097
3098static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3099{
3100 struct nfs4_exception exception = { };
3101 int err;
3102
3103 do {
3104 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3105 _nfs4_proc_getlk(state, cmd, request),
3106 &exception);
3107 } while (exception.retry);
3108 return err;
3109}
3110
3111static int do_vfs_lock(struct file *file, struct file_lock *fl)
3112{
3113 int res = 0;
3114 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3115 case FL_POSIX:
3116 res = posix_lock_file_wait(file, fl);
3117 break;
3118 case FL_FLOCK:
3119 res = flock_lock_file_wait(file, fl);
3120 break;
3121 default:
3122 BUG();
3123 }
1da177e4
LT		 3124 return res;
3125}
3126
faf5f49c 3127struct nfs4_unlockdata {
911d1aaf
TM		 3128 struct nfs_locku_args arg;
3129 struct nfs_locku_res res;
faf5f49c
TM		 3130 struct nfs4_lock_state *lsp;
3131 struct nfs_open_context *ctx;
911d1aaf
TM		 3132 struct file_lock fl;
3133 const struct nfs_server *server;
26e976a8 3134 unsigned long timestamp;
faf5f49c
TM		 3135};
3136
911d1aaf
TM		 3137static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3138 struct nfs_open_context *ctx,
3139 struct nfs4_lock_state *lsp,
3140 struct nfs_seqid *seqid)
3141{
3142 struct nfs4_unlockdata *p;
3143 struct inode *inode = lsp->ls_state->inode;
3144
3145 p = kmalloc(sizeof(*p), GFP_KERNEL);
3146 if (p == NULL)
3147 return NULL;
3148 p->arg.fh = NFS_FH(inode);
3149 p->arg.fl = &p->fl;
3150 p->arg.seqid = seqid;
3151 p->arg.stateid = &lsp->ls_stateid;
3152 p->lsp = lsp;
3153 atomic_inc(&lsp->ls_count);
3154 /* Ensure we don't close file until we're done freeing locks! */
3155 p->ctx = get_nfs_open_context(ctx);
3156 memcpy(&p->fl, fl, sizeof(p->fl));
3157 p->server = NFS_SERVER(inode);
3158 return p;
3159}
3160
06f814a3 3161static void nfs4_locku_release_calldata(void *data)
faf5f49c 3162{
963d8fe5 3163 struct nfs4_unlockdata *calldata = data;
911d1aaf 3164 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3165 nfs4_put_lock_state(calldata->lsp);
3166 put_nfs_open_context(calldata->ctx);
3167 kfree(calldata);
faf5f49c
TM		 3168}
3169
963d8fe5 3170static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3171{
963d8fe5 3172 struct nfs4_unlockdata *calldata = data;
faf5f49c 3173
06f814a3
TM		 3174 if (RPC_ASSASSINATED(task))
3175 return;
911d1aaf 3176 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3177 switch (task->tk_status) {
3178 case 0:
3179 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3180 calldata->res.stateid.data,
faf5f49c 3181 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3182 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3183 break;
3184 case -NFS4ERR_STALE_STATEID:
3185 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3186 break;
3187 default:
a6a352e9 3188 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3189 rpc_restart_call(task);
faf5f49c 3190 }
faf5f49c
TM		 3191}
3192
4ce70ada 3193static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3194{
4ce70ada 3195 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3196 struct rpc_message msg = {
3197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3198 .rpc_argp = &calldata->arg,
3199 .rpc_resp = &calldata->res,
3200 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3201 };
faf5f49c 3202
911d1aaf 3203 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3204 return;
3205 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3206 /* Note: exit _without_ running nfs4_locku_done */
3207 task->tk_action = NULL;
faf5f49c
TM		 3208 return;
3209 }
26e976a8 3210 calldata->timestamp = jiffies;
faf5f49c
TM		 3211 rpc_call_setup(task, &msg, 0);
3212}
3213
963d8fe5 3214static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3215 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3216 .rpc_call_done = nfs4_locku_done,
06f814a3 3217 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3218};
3219
a5d16a4d
TM		 3220static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3221 struct nfs_open_context *ctx,
3222 struct nfs4_lock_state *lsp,
3223 struct nfs_seqid *seqid)
3224{
3225 struct nfs4_unlockdata *data;
a5d16a4d
TM		 3226
3227 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3228 if (data == NULL) {
3229 nfs_free_seqid(seqid);
3230 return ERR_PTR(-ENOMEM);
3231 }
3232
7a1218a2 3233 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM		 3234}
3235
faf5f49c
TM		 3236static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3237{
911d1aaf 3238 struct nfs_seqid *seqid;
1da177e4 3239 struct nfs4_lock_state *lsp;
06f814a3
TM		 3240 struct rpc_task *task;
3241 int status = 0;
faf5f49c 3242
8d0a8a9d 3243 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3244 /* Unlock _before_ we do the RPC call */
3245 request->fl_flags |= FL_EXISTS;
3246 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3247 goto out;
8d0a8a9d 3248 if (status != 0)
9b073574
TM		 3249 goto out;
3250 /* Is this a delegated lock? */
3251 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3252 goto out;
8d0a8a9d 3253 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3254 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3255 status = -ENOMEM;
911d1aaf 3256 if (seqid == NULL)
9b073574 3257 goto out;
a5d16a4d
TM		 3258 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3259 status = PTR_ERR(task);
3260 if (IS_ERR(task))
9b073574 3261 goto out;
a5d16a4d 3262 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3263 rpc_put_task(task);
9b073574 3264out:
1da177e4
LT		 3265 return status;
3266}
3267
a5d16a4d
TM		 3268struct nfs4_lockdata {
3269 struct nfs_lock_args arg;
3270 struct nfs_lock_res res;
3271 struct nfs4_lock_state *lsp;
3272 struct nfs_open_context *ctx;
3273 struct file_lock fl;
26e976a8 3274 unsigned long timestamp;
a5d16a4d
TM		 3275 int rpc_status;
3276 int cancelled;
3277};
3278
3279static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3280 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3281{
a5d16a4d
TM		 3282 struct nfs4_lockdata *p;
3283 struct inode *inode = lsp->ls_state->inode;
1da177e4 3284 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3285
3286 p = kzalloc(sizeof(*p), GFP_KERNEL);
3287 if (p == NULL)
3288 return NULL;
3289
3290 p->arg.fh = NFS_FH(inode);
3291 p->arg.fl = &p->fl;
3292 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3293 if (p->arg.lock_seqid == NULL)
3294 goto out_free;
3295 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3296 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3297 p->arg.lock_owner.id = lsp->ls_id.id;
a5d16a4d
TM		 3298 p->lsp = lsp;
3299 atomic_inc(&lsp->ls_count);
3300 p->ctx = get_nfs_open_context(ctx);
3301 memcpy(&p->fl, fl, sizeof(p->fl));
3302 return p;
3303out_free:
3304 kfree(p);
3305 return NULL;
3306}
3307
3308static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3309{
3310 struct nfs4_lockdata *data = calldata;
3311 struct nfs4_state *state = data->lsp->ls_state;
3312 struct nfs4_state_owner *sp = state->owner;
1da177e4 3313 struct rpc_message msg = {
a5d16a4d
TM		 3314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3315 .rpc_argp = &data->arg,
3316 .rpc_resp = &data->res,
3317 .rpc_cred = sp->so_cred,
1da177e4 3318 };
06735b34 3319
a5d16a4d
TM		 3320 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3321 return;
3322 dprintk("%s: begin!\n", __FUNCTION__);
3323 /* Do we need to do an open_to_lock_owner? */
3324 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3325 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3326 if (data->arg.open_seqid == NULL) {
3327 data->rpc_status = -ENOMEM;
3328 task->tk_action = NULL;
06735b34 3329 goto out;
8d0a8a9d 3330 }
a5d16a4d
TM		 3331 data->arg.open_stateid = &state->stateid;
3332 data->arg.new_lock_owner = 1;
3333 }
26e976a8 3334 data->timestamp = jiffies;
a5d16a4d 3335 rpc_call_setup(task, &msg, 0);
06735b34 3336out:
a5d16a4d
TM		 3337 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3338}
3339
3340static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3341{
3342 struct nfs4_lockdata *data = calldata;
3343
3344 dprintk("%s: begin!\n", __FUNCTION__);
3345
3346 data->rpc_status = task->tk_status;
3347 if (RPC_ASSASSINATED(task))
3348 goto out;
3349 if (data->arg.new_lock_owner != 0) {
3350 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3351 if (data->rpc_status == 0)
3352 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3353 else
3354 goto out;
3355 }
3356 if (data->rpc_status == 0) {
3357 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3358 sizeof(data->lsp->ls_stateid.data));
3359 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3360 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3361 }
3362 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3363out:
3364 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3365}
3366
3367static void nfs4_lock_release(void *calldata)
3368{
3369 struct nfs4_lockdata *data = calldata;
3370
3371 dprintk("%s: begin!\n", __FUNCTION__);
3372 if (data->arg.open_seqid != NULL)
3373 nfs_free_seqid(data->arg.open_seqid);
3374 if (data->cancelled != 0) {
3375 struct rpc_task *task;
3376 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3377 data->arg.lock_seqid);
3378 if (!IS_ERR(task))
e6b3c4db 3379 rpc_put_task(task);
a5d16a4d
TM		 3380 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3381 } else
3382 nfs_free_seqid(data->arg.lock_seqid);
3383 nfs4_put_lock_state(data->lsp);
3384 put_nfs_open_context(data->ctx);
3385 kfree(data);
3386 dprintk("%s: done!\n", __FUNCTION__);
3387}
3388
3389static const struct rpc_call_ops nfs4_lock_ops = {
3390 .rpc_call_prepare = nfs4_lock_prepare,
3391 .rpc_call_done = nfs4_lock_done,
3392 .rpc_release = nfs4_lock_release,
3393};
3394
3395static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3396{
3397 struct nfs4_lockdata *data;
3398 struct rpc_task *task;
3399 int ret;
3400
3401 dprintk("%s: begin!\n", __FUNCTION__);
3402 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3403 fl->fl_u.nfs4_fl.owner);
3404 if (data == NULL)
3405 return -ENOMEM;
3406 if (IS_SETLKW(cmd))
3407 data->arg.block = 1;
3408 if (reclaim != 0)
3409 data->arg.reclaim = 1;
3410 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3411 &nfs4_lock_ops, data);
7a1218a2 3412 if (IS_ERR(task))
a5d16a4d 3413 return PTR_ERR(task);
a5d16a4d
TM		 3414 ret = nfs4_wait_for_completion_rpc_task(task);
3415 if (ret == 0) {
3416 ret = data->rpc_status;
3417 if (ret == -NFS4ERR_DENIED)
3418 ret = -EAGAIN;
3419 } else
3420 data->cancelled = 1;
e6b3c4db 3421 rpc_put_task(task);
a5d16a4d
TM		 3422 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3423 return ret;
1da177e4
LT		 3424}
3425
3426static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3427{
202b50dc
TM		 3428 struct nfs_server *server = NFS_SERVER(state->inode);
3429 struct nfs4_exception exception = { };
3430 int err;
3431
3432 do {
42a2d13e
TM		 3433 /* Cache the lock if possible... */
3434 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3435 return 0;
202b50dc
TM		 3436 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3437 if (err != -NFS4ERR_DELAY)
3438 break;
3439 nfs4_handle_exception(server, err, &exception);
3440 } while (exception.retry);
3441 return err;
1da177e4
LT		 3442}
3443
3444static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3445{
202b50dc
TM		 3446 struct nfs_server *server = NFS_SERVER(state->inode);
3447 struct nfs4_exception exception = { };
3448 int err;
3449
6bfc93ef
TM		 3450 err = nfs4_set_lock_state(state, request);
3451 if (err != 0)
3452 return err;
202b50dc 3453 do {
42a2d13e
TM		 3454 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3455 return 0;
202b50dc
TM		 3456 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3457 if (err != -NFS4ERR_DELAY)
3458 break;
3459 nfs4_handle_exception(server, err, &exception);
3460 } while (exception.retry);
3461 return err;
1da177e4
LT		 3462}
3463
3464static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3465{
adfa6f98 3466 struct nfs_client *clp = state->owner->so_client;
01c3b861 3467 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3468 int status;
3469
6bfc93ef 3470 /* Is this a delegated open? */
6bfc93ef
TM		 3471 status = nfs4_set_lock_state(state, request);
3472 if (status != 0)
3473 goto out;
01c3b861
TM		 3474 request->fl_flags |= FL_ACCESS;
3475 status = do_vfs_lock(request->fl_file, request);
3476 if (status < 0)
3477 goto out;
3478 down_read(&clp->cl_sem);
3479 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3480 struct nfs_inode *nfsi = NFS_I(state->inode);
3481 /* Yes: cache locks! */
3482 down_read(&nfsi->rwsem);
3483 /* ...but avoid races with delegation recall... */
3484 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3485 request->fl_flags = fl_flags & ~FL_SLEEP;
3486 status = do_vfs_lock(request->fl_file, request);
3487 up_read(&nfsi->rwsem);
3488 goto out_unlock;
3489 }
3490 up_read(&nfsi->rwsem);
3491 }
6bfc93ef
TM		 3492 status = _nfs4_do_setlk(state, cmd, request, 0);
3493 if (status != 0)
01c3b861 3494 goto out_unlock;
6bfc93ef 3495 /* Note: we always want to sleep here! */
01c3b861 3496 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3497 if (do_vfs_lock(request->fl_file, request) < 0)
3498 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3499out_unlock:
1da177e4 3500 up_read(&clp->cl_sem);
01c3b861
TM		 3501out:
3502 request->fl_flags = fl_flags;
1da177e4
LT		 3503 return status;
3504}
3505
3506static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3507{
3508 struct nfs4_exception exception = { };
3509 int err;
3510
3511 do {
3512 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3513 _nfs4_proc_setlk(state, cmd, request),
3514 &exception);
3515 } while (exception.retry);
3516 return err;
3517}
3518
3519static int
3520nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3521{
3522 struct nfs_open_context *ctx;
3523 struct nfs4_state *state;
3524 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3525 int status;
3526
3527 /* verify open state */
3528 ctx = (struct nfs_open_context *)filp->private_data;
3529 state = ctx->state;
3530
3531 if (request->fl_start < 0 || request->fl_end < 0)
3532 return -EINVAL;
3533
3534 if (IS_GETLK(cmd))
3535 return nfs4_proc_getlk(state, F_GETLK, request);
3536
3537 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3538 return -EINVAL;
3539
3540 if (request->fl_type == F_UNLCK)
3541 return nfs4_proc_unlck(state, cmd, request);
3542
3543 do {
3544 status = nfs4_proc_setlk(state, cmd, request);
3545 if ((status != -EAGAIN) || IS_SETLK(cmd))
3546 break;
3547 timeout = nfs4_set_lock_task_retry(timeout);
3548 status = -ERESTARTSYS;
3549 if (signalled())
3550 break;
3551 } while(status < 0);
1da177e4
LT		 3552 return status;
3553}
3554
888e694c
TM		 3555int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3556{
3557 struct nfs_server *server = NFS_SERVER(state->inode);
3558 struct nfs4_exception exception = { };
3559 int err;
3560
3561 err = nfs4_set_lock_state(state, fl);
3562 if (err != 0)
3563 goto out;
3564 do {
3565 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3566 if (err != -NFS4ERR_DELAY)
3567 break;
3568 err = nfs4_handle_exception(server, err, &exception);
3569 } while (exception.retry);
3570out:
3571 return err;
3572}
6b3b5496 3573
aa1870af
BF		 3574#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3575
6b3b5496
BF		 3576int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3577 size_t buflen, int flags)
3578{
4b580ee3
BF		 3579 struct inode *inode = dentry->d_inode;
3580
3581 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3582 return -EOPNOTSUPP;
3583
3584 if (!S_ISREG(inode->i_mode) &&
3585 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3586 return -EPERM;
3587
3588 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3589}
3590
3591/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3592 * and that's what we'll do for e.g. user attributes that haven't been set.
3593 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3594 * attributes in kernel-managed attribute namespaces. */
3595ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3596 size_t buflen)
3597{
aa1870af
BF		 3598 struct inode *inode = dentry->d_inode;
3599
3600 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3601 return -EOPNOTSUPP;
3602
3603 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3604}
3605
3606ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3607{
aa1870af 3608 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3609
096455a2
BF		 3610 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3611 return 0;
6b3b5496
BF		 3612 if (buf && buflen < len)
3613 return -ERANGE;
3614 if (buf)
aa1870af
BF		 3615 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3616 return len;
6b3b5496
BF		 3617}
3618
c228fd3a 3619int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name,
7aaa0b3b 3620 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3621{
3622 struct nfs_server *server = NFS_SERVER(dir);
3623 u32 bitmask[2] = {
361e624f
MN		 3624 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3625 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3626 };
3627 struct nfs4_fs_locations_arg args = {
3628 .dir_fh = NFS_FH(dir),
c228fd3a 3629 .name = name,
683b57b4
TM		 3630 .page = page,
3631 .bitmask = bitmask,
3632 };
3633 struct rpc_message msg = {
3634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3635 .rpc_argp = &args,
7aaa0b3b 3636 .rpc_resp = fs_locations,
683b57b4
TM		 3637 };
3638 int status;
3639
3640 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3641 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3642 fs_locations->server = server;
830b8e33 3643 fs_locations->nlocations = 0;
683b57b4
TM		 3644 status = rpc_call_sync(server->client, &msg, 0);
3645 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3646 return status;
3647}
3648
1da177e4
LT		 3649struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3650 .recover_open = nfs4_open_reclaim,
3651 .recover_lock = nfs4_lock_reclaim,
3652};
3653
3654struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3655 .recover_open = nfs4_open_expired,
3656 .recover_lock = nfs4_lock_expired,
3657};
3658
92e1d5be 3659static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3660 .permission = nfs_permission,
3661 .getattr = nfs_getattr,
3662 .setattr = nfs_setattr,
3663 .getxattr = nfs4_getxattr,
3664 .setxattr = nfs4_setxattr,
3665 .listxattr = nfs4_listxattr,
3666};
3667
509de811 3668const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3669 .version = 4, /* protocol version */
3670 .dentry_ops = &nfs4_dentry_operations,
3671 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3672 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3673 .getroot = nfs4_proc_get_root,
3674 .getattr = nfs4_proc_getattr,
3675 .setattr = nfs4_proc_setattr,
2b3de441 3676 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3677 .lookup = nfs4_proc_lookup,
3678 .access = nfs4_proc_access,
3679 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3680 .create = nfs4_proc_create,
3681 .remove = nfs4_proc_remove,
3682 .unlink_setup = nfs4_proc_unlink_setup,
3683 .unlink_done = nfs4_proc_unlink_done,
3684 .rename = nfs4_proc_rename,
3685 .link = nfs4_proc_link,
3686 .symlink = nfs4_proc_symlink,
3687 .mkdir = nfs4_proc_mkdir,
3688 .rmdir = nfs4_proc_remove,
3689 .readdir = nfs4_proc_readdir,
3690 .mknod = nfs4_proc_mknod,
3691 .statfs = nfs4_proc_statfs,
3692 .fsinfo = nfs4_proc_fsinfo,
3693 .pathconf = nfs4_proc_pathconf,
e9326dca 3694 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3695 .decode_dirent = nfs4_decode_dirent,
3696 .read_setup = nfs4_proc_read_setup,
ec06c096 3697 .read_done = nfs4_read_done,
1da177e4 3698 .write_setup = nfs4_proc_write_setup,
788e7a89 3699 .write_done = nfs4_write_done,
1da177e4 3700 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3701 .commit_done = nfs4_commit_done,
02a913a7
TM		 3702 .file_open = nfs_open,
3703 .file_release = nfs_release,
1da177e4 3704 .lock = nfs4_proc_lock,
e50a1c2e 3705 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3706};
3707
3708/*
3709 * Local variables:
3710 * c-basic-offset: 8
3711 * End:
3712 */
Linux 6.x block layer and io_uring tree(s)