2 * linux/fs/9p/vfs_inode_dotl.c
4 * This file contains vfs inode ops for the 9P2000.L protocol.
6 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
7 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to:
20 * Free Software Foundation
21 * 51 Franklin Street, Fifth Floor
22 * Boston, MA 02111-1301 USA
26 #include <linux/module.h>
27 #include <linux/errno.h>
29 #include <linux/file.h>
30 #include <linux/pagemap.h>
31 #include <linux/stat.h>
32 #include <linux/string.h>
33 #include <linux/inet.h>
34 #include <linux/namei.h>
35 #include <linux/idr.h>
36 #include <linux/sched.h>
37 #include <linux/slab.h>
38 #include <linux/xattr.h>
39 #include <linux/posix_acl.h>
40 #include <net/9p/9p.h>
41 #include <net/9p/client.h>
51 v9fs_vfs_mknod_dotl(struct inode
*dir
, struct dentry
*dentry
, umode_t omode
,
55 * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
56 * new file system object. This checks the S_ISGID to determine the owning
57 * group of the new file system object.
60 static gid_t
v9fs_get_fsgid_for_create(struct inode
*dir_inode
)
62 BUG_ON(dir_inode
== NULL
);
64 if (dir_inode
->i_mode
& S_ISGID
) {
65 /* set_gid bit is set.*/
66 return dir_inode
->i_gid
;
68 return current_fsgid();
71 static int v9fs_test_inode_dotl(struct inode
*inode
, void *data
)
73 struct v9fs_inode
*v9inode
= V9FS_I(inode
);
74 struct p9_stat_dotl
*st
= (struct p9_stat_dotl
*)data
;
76 /* don't match inode of different type */
77 if ((inode
->i_mode
& S_IFMT
) != (st
->st_mode
& S_IFMT
))
80 if (inode
->i_generation
!= st
->st_gen
)
83 /* compare qid details */
84 if (memcmp(&v9inode
->qid
.version
,
85 &st
->qid
.version
, sizeof(v9inode
->qid
.version
)))
88 if (v9inode
->qid
.type
!= st
->qid
.type
)
93 /* Always get a new inode */
94 static int v9fs_test_new_inode_dotl(struct inode
*inode
, void *data
)
99 static int v9fs_set_inode_dotl(struct inode
*inode
, void *data
)
101 struct v9fs_inode
*v9inode
= V9FS_I(inode
);
102 struct p9_stat_dotl
*st
= (struct p9_stat_dotl
*)data
;
104 memcpy(&v9inode
->qid
, &st
->qid
, sizeof(st
->qid
));
105 inode
->i_generation
= st
->st_gen
;
109 static struct inode
*v9fs_qid_iget_dotl(struct super_block
*sb
,
112 struct p9_stat_dotl
*st
,
118 struct v9fs_session_info
*v9ses
= sb
->s_fs_info
;
119 int (*test
)(struct inode
*, void *);
122 test
= v9fs_test_new_inode_dotl
;
124 test
= v9fs_test_inode_dotl
;
126 i_ino
= v9fs_qid2ino(qid
);
127 inode
= iget5_locked(sb
, i_ino
, test
, v9fs_set_inode_dotl
, st
);
129 return ERR_PTR(-ENOMEM
);
130 if (!(inode
->i_state
& I_NEW
))
133 * initialize the inode with the stat info
134 * FIXME!! we may need support for stale inodes
137 inode
->i_ino
= i_ino
;
138 retval
= v9fs_init_inode(v9ses
, inode
,
139 st
->st_mode
, new_decode_dev(st
->st_rdev
));
143 v9fs_stat2inode_dotl(st
, inode
);
144 #ifdef CONFIG_9P_FSCACHE
145 v9fs_cache_inode_get_cookie(inode
);
147 retval
= v9fs_get_acl(inode
, fid
);
151 unlock_new_inode(inode
);
154 unlock_new_inode(inode
);
156 return ERR_PTR(retval
);
161 v9fs_inode_from_fid_dotl(struct v9fs_session_info
*v9ses
, struct p9_fid
*fid
,
162 struct super_block
*sb
, int new)
164 struct p9_stat_dotl
*st
;
165 struct inode
*inode
= NULL
;
167 st
= p9_client_getattr_dotl(fid
, P9_STATS_BASIC
| P9_STATS_GEN
);
171 inode
= v9fs_qid_iget_dotl(sb
, &st
->qid
, fid
, st
, new);
176 struct dotl_openflag_map
{
181 static int v9fs_mapped_dotl_flags(int flags
)
185 struct dotl_openflag_map dotl_oflag_map
[] = {
186 { O_CREAT
, P9_DOTL_CREATE
},
187 { O_EXCL
, P9_DOTL_EXCL
},
188 { O_NOCTTY
, P9_DOTL_NOCTTY
},
189 { O_TRUNC
, P9_DOTL_TRUNC
},
190 { O_APPEND
, P9_DOTL_APPEND
},
191 { O_NONBLOCK
, P9_DOTL_NONBLOCK
},
192 { O_DSYNC
, P9_DOTL_DSYNC
},
193 { FASYNC
, P9_DOTL_FASYNC
},
194 { O_DIRECT
, P9_DOTL_DIRECT
},
195 { O_LARGEFILE
, P9_DOTL_LARGEFILE
},
196 { O_DIRECTORY
, P9_DOTL_DIRECTORY
},
197 { O_NOFOLLOW
, P9_DOTL_NOFOLLOW
},
198 { O_NOATIME
, P9_DOTL_NOATIME
},
199 { O_CLOEXEC
, P9_DOTL_CLOEXEC
},
200 { O_SYNC
, P9_DOTL_SYNC
},
202 for (i
= 0; i
< ARRAY_SIZE(dotl_oflag_map
); i
++) {
203 if (flags
& dotl_oflag_map
[i
].open_flag
)
204 rflags
|= dotl_oflag_map
[i
].dotl_flag
;
210 * v9fs_open_to_dotl_flags- convert Linux specific open flags to
212 * @flags: flags to convert
214 int v9fs_open_to_dotl_flags(int flags
)
219 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
220 * and P9_DOTL_NOACCESS
222 rflags
|= flags
& O_ACCMODE
;
223 rflags
|= v9fs_mapped_dotl_flags(flags
);
229 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
230 * @dir: directory inode that is being created
231 * @dentry: dentry that is being deleted
232 * @mode: create permissions
237 v9fs_vfs_create_dotl(struct inode
*dir
, struct dentry
*dentry
, umode_t omode
,
240 return v9fs_vfs_mknod_dotl(dir
, dentry
, omode
, 0);
244 v9fs_vfs_atomic_open_dotl(struct inode
*dir
, struct dentry
*dentry
,
245 struct file
*file
, unsigned flags
, umode_t omode
,
254 struct p9_fid
*fid
= NULL
;
255 struct v9fs_inode
*v9inode
;
256 struct p9_fid
*dfid
, *ofid
, *inode_fid
;
257 struct v9fs_session_info
*v9ses
;
258 struct posix_acl
*pacl
= NULL
, *dacl
= NULL
;
259 struct dentry
*res
= NULL
;
261 if (d_unhashed(dentry
)) {
262 res
= v9fs_vfs_lookup(dir
, dentry
, 0);
271 if (!(flags
& O_CREAT
) || dentry
->d_inode
)
272 return finish_no_open(file
, res
);
274 v9ses
= v9fs_inode2v9ses(dir
);
276 name
= (char *) dentry
->d_name
.name
;
277 p9_debug(P9_DEBUG_VFS
, "name:%s flags:0x%x mode:0x%hx\n",
280 dfid
= v9fs_fid_lookup(dentry
->d_parent
);
283 p9_debug(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
287 /* clone a fid to use for creation */
288 ofid
= p9_client_walk(dfid
, 0, NULL
, 1);
291 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n", err
);
295 gid
= v9fs_get_fsgid_for_create(dir
);
298 /* Update mode based on ACL value */
299 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
301 p9_debug(P9_DEBUG_VFS
, "Failed to get acl values in creat %d\n",
305 err
= p9_client_create_dotl(ofid
, name
, v9fs_open_to_dotl_flags(flags
),
308 p9_debug(P9_DEBUG_VFS
, "p9_client_open_dotl failed in creat %d\n",
312 v9fs_invalidate_inode_attr(dir
);
314 /* instantiate inode and assign the unopened fid to the dentry */
315 fid
= p9_client_walk(dfid
, 1, &name
, 1);
318 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n", err
);
322 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
324 err
= PTR_ERR(inode
);
325 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n", err
);
328 err
= v9fs_fid_add(dentry
, fid
);
331 d_instantiate(dentry
, inode
);
333 /* Now set the ACL based on the default value */
334 v9fs_set_create_acl(dentry
, &dacl
, &pacl
);
336 v9inode
= V9FS_I(inode
);
337 mutex_lock(&v9inode
->v_mutex
);
338 if (v9ses
->cache
&& !v9inode
->writeback_fid
&&
339 ((flags
& O_ACCMODE
) != O_RDONLY
)) {
341 * clone a fid and add it to writeback_fid
342 * we do it during open time instead of
343 * page dirty time via write_begin/page_mkwrite
344 * because we want write after unlink usecase
347 inode_fid
= v9fs_writeback_fid(dentry
);
348 if (IS_ERR(inode_fid
)) {
349 err
= PTR_ERR(inode_fid
);
350 mutex_unlock(&v9inode
->v_mutex
);
351 goto err_clunk_old_fid
;
353 v9inode
->writeback_fid
= (void *) inode_fid
;
355 mutex_unlock(&v9inode
->v_mutex
);
356 /* Since we are opening a file, assign the open fid to the file */
357 err
= finish_open(file
, dentry
, generic_file_open
, opened
);
359 goto err_clunk_old_fid
;
360 file
->private_data
= ofid
;
361 #ifdef CONFIG_9P_FSCACHE
363 v9fs_cache_inode_set_cookie(inode
, file
);
365 *opened
|= FILE_CREATED
;
372 p9_client_clunk(fid
);
375 p9_client_clunk(ofid
);
376 v9fs_set_create_acl(NULL
, &dacl
, &pacl
);
381 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
382 * @dir: inode that is being unlinked
383 * @dentry: dentry that is being unlinked
384 * @mode: mode for new directory
388 static int v9fs_vfs_mkdir_dotl(struct inode
*dir
,
389 struct dentry
*dentry
, umode_t omode
)
392 struct v9fs_session_info
*v9ses
;
393 struct p9_fid
*fid
= NULL
, *dfid
= NULL
;
399 struct dentry
*dir_dentry
;
400 struct posix_acl
*dacl
= NULL
, *pacl
= NULL
;
402 p9_debug(P9_DEBUG_VFS
, "name %s\n", dentry
->d_name
.name
);
404 v9ses
= v9fs_inode2v9ses(dir
);
407 if (dir
->i_mode
& S_ISGID
)
410 dir_dentry
= dentry
->d_parent
;
411 dfid
= v9fs_fid_lookup(dir_dentry
);
414 p9_debug(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
419 gid
= v9fs_get_fsgid_for_create(dir
);
421 /* Update mode based on ACL value */
422 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
424 p9_debug(P9_DEBUG_VFS
, "Failed to get acl values in mkdir %d\n",
428 name
= (char *) dentry
->d_name
.name
;
429 err
= p9_client_mkdir_dotl(dfid
, name
, mode
, gid
, &qid
);
433 /* instantiate inode and assign the unopened fid to the dentry */
434 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
435 fid
= p9_client_walk(dfid
, 1, &name
, 1);
438 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
444 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
446 err
= PTR_ERR(inode
);
447 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n",
451 err
= v9fs_fid_add(dentry
, fid
);
454 d_instantiate(dentry
, inode
);
458 * Not in cached mode. No need to populate
459 * inode with stat. We need to get an inode
460 * so that we can set the acl with dentry
462 inode
= v9fs_get_inode(dir
->i_sb
, mode
, 0);
464 err
= PTR_ERR(inode
);
467 d_instantiate(dentry
, inode
);
469 /* Now set the ACL based on the default value */
470 v9fs_set_create_acl(dentry
, &dacl
, &pacl
);
472 v9fs_invalidate_inode_attr(dir
);
475 p9_client_clunk(fid
);
476 v9fs_set_create_acl(NULL
, &dacl
, &pacl
);
481 v9fs_vfs_getattr_dotl(struct vfsmount
*mnt
, struct dentry
*dentry
,
485 struct v9fs_session_info
*v9ses
;
487 struct p9_stat_dotl
*st
;
489 p9_debug(P9_DEBUG_VFS
, "dentry: %p\n", dentry
);
491 v9ses
= v9fs_dentry2v9ses(dentry
);
492 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
493 generic_fillattr(dentry
->d_inode
, stat
);
496 fid
= v9fs_fid_lookup(dentry
);
500 /* Ask for all the fields in stat structure. Server will return
501 * whatever it supports
504 st
= p9_client_getattr_dotl(fid
, P9_STATS_ALL
);
508 v9fs_stat2inode_dotl(st
, dentry
->d_inode
);
509 generic_fillattr(dentry
->d_inode
, stat
);
510 /* Change block size to what the server returned */
511 stat
->blksize
= st
->st_blksize
;
520 #define P9_ATTR_MODE (1 << 0)
521 #define P9_ATTR_UID (1 << 1)
522 #define P9_ATTR_GID (1 << 2)
523 #define P9_ATTR_SIZE (1 << 3)
524 #define P9_ATTR_ATIME (1 << 4)
525 #define P9_ATTR_MTIME (1 << 5)
526 #define P9_ATTR_CTIME (1 << 6)
527 #define P9_ATTR_ATIME_SET (1 << 7)
528 #define P9_ATTR_MTIME_SET (1 << 8)
530 struct dotl_iattr_map
{
535 static int v9fs_mapped_iattr_valid(int iattr_valid
)
538 int p9_iattr_valid
= 0;
539 struct dotl_iattr_map dotl_iattr_map
[] = {
540 { ATTR_MODE
, P9_ATTR_MODE
},
541 { ATTR_UID
, P9_ATTR_UID
},
542 { ATTR_GID
, P9_ATTR_GID
},
543 { ATTR_SIZE
, P9_ATTR_SIZE
},
544 { ATTR_ATIME
, P9_ATTR_ATIME
},
545 { ATTR_MTIME
, P9_ATTR_MTIME
},
546 { ATTR_CTIME
, P9_ATTR_CTIME
},
547 { ATTR_ATIME_SET
, P9_ATTR_ATIME_SET
},
548 { ATTR_MTIME_SET
, P9_ATTR_MTIME_SET
},
550 for (i
= 0; i
< ARRAY_SIZE(dotl_iattr_map
); i
++) {
551 if (iattr_valid
& dotl_iattr_map
[i
].iattr_valid
)
552 p9_iattr_valid
|= dotl_iattr_map
[i
].p9_iattr_valid
;
554 return p9_iattr_valid
;
558 * v9fs_vfs_setattr_dotl - set file metadata
559 * @dentry: file whose metadata to set
560 * @iattr: metadata assignment structure
564 int v9fs_vfs_setattr_dotl(struct dentry
*dentry
, struct iattr
*iattr
)
567 struct v9fs_session_info
*v9ses
;
569 struct p9_iattr_dotl p9attr
;
571 p9_debug(P9_DEBUG_VFS
, "\n");
573 retval
= inode_change_ok(dentry
->d_inode
, iattr
);
577 p9attr
.valid
= v9fs_mapped_iattr_valid(iattr
->ia_valid
);
578 p9attr
.mode
= iattr
->ia_mode
;
579 p9attr
.uid
= iattr
->ia_uid
;
580 p9attr
.gid
= iattr
->ia_gid
;
581 p9attr
.size
= iattr
->ia_size
;
582 p9attr
.atime_sec
= iattr
->ia_atime
.tv_sec
;
583 p9attr
.atime_nsec
= iattr
->ia_atime
.tv_nsec
;
584 p9attr
.mtime_sec
= iattr
->ia_mtime
.tv_sec
;
585 p9attr
.mtime_nsec
= iattr
->ia_mtime
.tv_nsec
;
588 v9ses
= v9fs_dentry2v9ses(dentry
);
589 fid
= v9fs_fid_lookup(dentry
);
593 /* Write all dirty data */
594 if (S_ISREG(dentry
->d_inode
->i_mode
))
595 filemap_write_and_wait(dentry
->d_inode
->i_mapping
);
597 retval
= p9_client_setattr(fid
, &p9attr
);
601 if ((iattr
->ia_valid
& ATTR_SIZE
) &&
602 iattr
->ia_size
!= i_size_read(dentry
->d_inode
))
603 truncate_setsize(dentry
->d_inode
, iattr
->ia_size
);
605 v9fs_invalidate_inode_attr(dentry
->d_inode
);
606 setattr_copy(dentry
->d_inode
, iattr
);
607 mark_inode_dirty(dentry
->d_inode
);
608 if (iattr
->ia_valid
& ATTR_MODE
) {
609 /* We also want to update ACL when we update mode bits */
610 retval
= v9fs_acl_chmod(dentry
);
618 * v9fs_stat2inode_dotl - populate an inode structure with stat info
619 * @stat: stat structure
620 * @inode: inode to populate
621 * @sb: superblock of filesystem
626 v9fs_stat2inode_dotl(struct p9_stat_dotl
*stat
, struct inode
*inode
)
629 struct v9fs_inode
*v9inode
= V9FS_I(inode
);
631 if ((stat
->st_result_mask
& P9_STATS_BASIC
) == P9_STATS_BASIC
) {
632 inode
->i_atime
.tv_sec
= stat
->st_atime_sec
;
633 inode
->i_atime
.tv_nsec
= stat
->st_atime_nsec
;
634 inode
->i_mtime
.tv_sec
= stat
->st_mtime_sec
;
635 inode
->i_mtime
.tv_nsec
= stat
->st_mtime_nsec
;
636 inode
->i_ctime
.tv_sec
= stat
->st_ctime_sec
;
637 inode
->i_ctime
.tv_nsec
= stat
->st_ctime_nsec
;
638 inode
->i_uid
= stat
->st_uid
;
639 inode
->i_gid
= stat
->st_gid
;
640 set_nlink(inode
, stat
->st_nlink
);
642 mode
= stat
->st_mode
& S_IALLUGO
;
643 mode
|= inode
->i_mode
& ~S_IALLUGO
;
644 inode
->i_mode
= mode
;
646 i_size_write(inode
, stat
->st_size
);
647 inode
->i_blocks
= stat
->st_blocks
;
649 if (stat
->st_result_mask
& P9_STATS_ATIME
) {
650 inode
->i_atime
.tv_sec
= stat
->st_atime_sec
;
651 inode
->i_atime
.tv_nsec
= stat
->st_atime_nsec
;
653 if (stat
->st_result_mask
& P9_STATS_MTIME
) {
654 inode
->i_mtime
.tv_sec
= stat
->st_mtime_sec
;
655 inode
->i_mtime
.tv_nsec
= stat
->st_mtime_nsec
;
657 if (stat
->st_result_mask
& P9_STATS_CTIME
) {
658 inode
->i_ctime
.tv_sec
= stat
->st_ctime_sec
;
659 inode
->i_ctime
.tv_nsec
= stat
->st_ctime_nsec
;
661 if (stat
->st_result_mask
& P9_STATS_UID
)
662 inode
->i_uid
= stat
->st_uid
;
663 if (stat
->st_result_mask
& P9_STATS_GID
)
664 inode
->i_gid
= stat
->st_gid
;
665 if (stat
->st_result_mask
& P9_STATS_NLINK
)
666 set_nlink(inode
, stat
->st_nlink
);
667 if (stat
->st_result_mask
& P9_STATS_MODE
) {
668 inode
->i_mode
= stat
->st_mode
;
669 if ((S_ISBLK(inode
->i_mode
)) ||
670 (S_ISCHR(inode
->i_mode
)))
671 init_special_inode(inode
, inode
->i_mode
,
674 if (stat
->st_result_mask
& P9_STATS_RDEV
)
675 inode
->i_rdev
= new_decode_dev(stat
->st_rdev
);
676 if (stat
->st_result_mask
& P9_STATS_SIZE
)
677 i_size_write(inode
, stat
->st_size
);
678 if (stat
->st_result_mask
& P9_STATS_BLOCKS
)
679 inode
->i_blocks
= stat
->st_blocks
;
681 if (stat
->st_result_mask
& P9_STATS_GEN
)
682 inode
->i_generation
= stat
->st_gen
;
684 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
685 * because the inode structure does not have fields for them.
687 v9inode
->cache_validity
&= ~V9FS_INO_INVALID_ATTR
;
691 v9fs_vfs_symlink_dotl(struct inode
*dir
, struct dentry
*dentry
,
700 struct p9_fid
*fid
= NULL
;
701 struct v9fs_session_info
*v9ses
;
703 name
= (char *) dentry
->d_name
.name
;
704 p9_debug(P9_DEBUG_VFS
, "%lu,%s,%s\n", dir
->i_ino
, name
, symname
);
705 v9ses
= v9fs_inode2v9ses(dir
);
707 dfid
= v9fs_fid_lookup(dentry
->d_parent
);
710 p9_debug(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
714 gid
= v9fs_get_fsgid_for_create(dir
);
716 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
717 err
= p9_client_symlink(dfid
, name
, (char *)symname
, gid
, &qid
);
720 p9_debug(P9_DEBUG_VFS
, "p9_client_symlink failed %d\n", err
);
724 v9fs_invalidate_inode_attr(dir
);
726 /* Now walk from the parent so we can get an unopened fid. */
727 fid
= p9_client_walk(dfid
, 1, &name
, 1);
730 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
736 /* instantiate inode and assign the unopened fid to dentry */
737 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
739 err
= PTR_ERR(inode
);
740 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n",
744 err
= v9fs_fid_add(dentry
, fid
);
747 d_instantiate(dentry
, inode
);
750 /* Not in cached mode. No need to populate inode with stat */
751 inode
= v9fs_get_inode(dir
->i_sb
, S_IFLNK
, 0);
753 err
= PTR_ERR(inode
);
756 d_instantiate(dentry
, inode
);
761 p9_client_clunk(fid
);
767 * v9fs_vfs_link_dotl - create a hardlink for dotl
768 * @old_dentry: dentry for file to link to
769 * @dir: inode destination for new link
770 * @dentry: dentry for link
775 v9fs_vfs_link_dotl(struct dentry
*old_dentry
, struct inode
*dir
,
776 struct dentry
*dentry
)
780 struct dentry
*dir_dentry
;
781 struct p9_fid
*dfid
, *oldfid
;
782 struct v9fs_session_info
*v9ses
;
784 p9_debug(P9_DEBUG_VFS
, "dir ino: %lu, old_name: %s, new_name: %s\n",
785 dir
->i_ino
, old_dentry
->d_name
.name
, dentry
->d_name
.name
);
787 v9ses
= v9fs_inode2v9ses(dir
);
788 dir_dentry
= dentry
->d_parent
;
789 dfid
= v9fs_fid_lookup(dir_dentry
);
791 return PTR_ERR(dfid
);
793 oldfid
= v9fs_fid_lookup(old_dentry
);
795 return PTR_ERR(oldfid
);
797 name
= (char *) dentry
->d_name
.name
;
799 err
= p9_client_link(dfid
, oldfid
, (char *)dentry
->d_name
.name
);
802 p9_debug(P9_DEBUG_VFS
, "p9_client_link failed %d\n", err
);
806 v9fs_invalidate_inode_attr(dir
);
807 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
808 /* Get the latest stat info from server. */
810 fid
= v9fs_fid_lookup(old_dentry
);
814 v9fs_refresh_inode_dotl(fid
, old_dentry
->d_inode
);
816 ihold(old_dentry
->d_inode
);
817 d_instantiate(dentry
, old_dentry
->d_inode
);
823 * v9fs_vfs_mknod_dotl - create a special file
824 * @dir: inode destination for new link
825 * @dentry: dentry for file
826 * @mode: mode for creation
827 * @rdev: device associated with special file
831 v9fs_vfs_mknod_dotl(struct inode
*dir
, struct dentry
*dentry
, umode_t omode
,
838 struct v9fs_session_info
*v9ses
;
839 struct p9_fid
*fid
= NULL
, *dfid
= NULL
;
842 struct dentry
*dir_dentry
;
843 struct posix_acl
*dacl
= NULL
, *pacl
= NULL
;
845 p9_debug(P9_DEBUG_VFS
, " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n",
846 dir
->i_ino
, dentry
->d_name
.name
, omode
,
847 MAJOR(rdev
), MINOR(rdev
));
849 if (!new_valid_dev(rdev
))
852 v9ses
= v9fs_inode2v9ses(dir
);
853 dir_dentry
= dentry
->d_parent
;
854 dfid
= v9fs_fid_lookup(dir_dentry
);
857 p9_debug(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
862 gid
= v9fs_get_fsgid_for_create(dir
);
864 /* Update mode based on ACL value */
865 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
867 p9_debug(P9_DEBUG_VFS
, "Failed to get acl values in mknod %d\n",
871 name
= (char *) dentry
->d_name
.name
;
873 err
= p9_client_mknod_dotl(dfid
, name
, mode
, rdev
, gid
, &qid
);
877 v9fs_invalidate_inode_attr(dir
);
878 /* instantiate inode and assign the unopened fid to the dentry */
879 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
880 fid
= p9_client_walk(dfid
, 1, &name
, 1);
883 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
889 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
891 err
= PTR_ERR(inode
);
892 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n",
896 err
= v9fs_fid_add(dentry
, fid
);
899 d_instantiate(dentry
, inode
);
903 * Not in cached mode. No need to populate inode with stat.
904 * socket syscall returns a fd, so we need instantiate
906 inode
= v9fs_get_inode(dir
->i_sb
, mode
, rdev
);
908 err
= PTR_ERR(inode
);
911 d_instantiate(dentry
, inode
);
913 /* Now set the ACL based on the default value */
914 v9fs_set_create_acl(dentry
, &dacl
, &pacl
);
917 p9_client_clunk(fid
);
918 v9fs_set_create_acl(NULL
, &dacl
, &pacl
);
923 * v9fs_vfs_follow_link_dotl - follow a symlink path
924 * @dentry: dentry for symlink
930 v9fs_vfs_follow_link_dotl(struct dentry
*dentry
, struct nameidata
*nd
)
934 char *link
= __getname();
937 p9_debug(P9_DEBUG_VFS
, "%s\n", dentry
->d_name
.name
);
940 link
= ERR_PTR(-ENOMEM
);
943 fid
= v9fs_fid_lookup(dentry
);
946 link
= ERR_CAST(fid
);
949 retval
= p9_client_readlink(fid
, &target
);
951 strcpy(link
, target
);
956 link
= ERR_PTR(retval
);
958 nd_set_link(nd
, link
);
962 int v9fs_refresh_inode_dotl(struct p9_fid
*fid
, struct inode
*inode
)
965 struct p9_stat_dotl
*st
;
966 struct v9fs_session_info
*v9ses
;
968 v9ses
= v9fs_inode2v9ses(inode
);
969 st
= p9_client_getattr_dotl(fid
, P9_STATS_ALL
);
973 * Don't update inode if the file type is different
975 if ((inode
->i_mode
& S_IFMT
) != (st
->st_mode
& S_IFMT
))
978 spin_lock(&inode
->i_lock
);
980 * We don't want to refresh inode->i_size,
981 * because we may have cached data
983 i_size
= inode
->i_size
;
984 v9fs_stat2inode_dotl(st
, inode
);
986 inode
->i_size
= i_size
;
987 spin_unlock(&inode
->i_lock
);
993 const struct inode_operations v9fs_dir_inode_operations_dotl
= {
994 .create
= v9fs_vfs_create_dotl
,
995 .atomic_open
= v9fs_vfs_atomic_open_dotl
,
996 .lookup
= v9fs_vfs_lookup
,
997 .link
= v9fs_vfs_link_dotl
,
998 .symlink
= v9fs_vfs_symlink_dotl
,
999 .unlink
= v9fs_vfs_unlink
,
1000 .mkdir
= v9fs_vfs_mkdir_dotl
,
1001 .rmdir
= v9fs_vfs_rmdir
,
1002 .mknod
= v9fs_vfs_mknod_dotl
,
1003 .rename
= v9fs_vfs_rename
,
1004 .getattr
= v9fs_vfs_getattr_dotl
,
1005 .setattr
= v9fs_vfs_setattr_dotl
,
1006 .setxattr
= generic_setxattr
,
1007 .getxattr
= generic_getxattr
,
1008 .removexattr
= generic_removexattr
,
1009 .listxattr
= v9fs_listxattr
,
1010 .get_acl
= v9fs_iop_get_acl
,
1013 const struct inode_operations v9fs_file_inode_operations_dotl
= {
1014 .getattr
= v9fs_vfs_getattr_dotl
,
1015 .setattr
= v9fs_vfs_setattr_dotl
,
1016 .setxattr
= generic_setxattr
,
1017 .getxattr
= generic_getxattr
,
1018 .removexattr
= generic_removexattr
,
1019 .listxattr
= v9fs_listxattr
,
1020 .get_acl
= v9fs_iop_get_acl
,
1023 const struct inode_operations v9fs_symlink_inode_operations_dotl
= {
1024 .readlink
= generic_readlink
,
1025 .follow_link
= v9fs_vfs_follow_link_dotl
,
1026 .put_link
= v9fs_vfs_put_link
,
1027 .getattr
= v9fs_vfs_getattr_dotl
,
1028 .setattr
= v9fs_vfs_setattr_dotl
,
1029 .setxattr
= generic_setxattr
,
1030 .getxattr
= generic_getxattr
,
1031 .removexattr
= generic_removexattr
,
1032 .listxattr
= v9fs_listxattr
,