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
,
238 struct nameidata
*nd
)
240 return v9fs_vfs_mknod_dotl(dir
, dentry
, omode
, 0);
244 v9fs_vfs_atomic_open_dotl(struct inode
*dir
, struct dentry
*dentry
,
245 struct opendata
*od
, unsigned flags
, umode_t omode
,
255 struct p9_fid
*fid
= NULL
;
256 struct v9fs_inode
*v9inode
;
257 struct p9_fid
*dfid
, *ofid
, *inode_fid
;
258 struct v9fs_session_info
*v9ses
;
259 struct posix_acl
*pacl
= NULL
, *dacl
= NULL
;
260 struct dentry
*res
= NULL
;
262 if (d_unhashed(dentry
)) {
263 res
= v9fs_vfs_lookup(dir
, dentry
, NULL
);
265 return ERR_CAST(res
);
272 if (!(flags
& O_CREAT
) || dentry
->d_inode
) {
273 finish_no_open(od
, res
);
277 v9ses
= v9fs_inode2v9ses(dir
);
279 name
= (char *) dentry
->d_name
.name
;
280 p9_debug(P9_DEBUG_VFS
, "name:%s flags:0x%x mode:0x%hx\n",
283 dfid
= v9fs_fid_lookup(dentry
->d_parent
);
286 p9_debug(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
290 /* clone a fid to use for creation */
291 ofid
= p9_client_walk(dfid
, 0, NULL
, 1);
294 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n", err
);
298 gid
= v9fs_get_fsgid_for_create(dir
);
301 /* Update mode based on ACL value */
302 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
304 p9_debug(P9_DEBUG_VFS
, "Failed to get acl values in creat %d\n",
308 err
= p9_client_create_dotl(ofid
, name
, v9fs_open_to_dotl_flags(flags
),
311 p9_debug(P9_DEBUG_VFS
, "p9_client_open_dotl failed in creat %d\n",
315 v9fs_invalidate_inode_attr(dir
);
317 /* instantiate inode and assign the unopened fid to the dentry */
318 fid
= p9_client_walk(dfid
, 1, &name
, 1);
321 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n", err
);
325 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
327 err
= PTR_ERR(inode
);
328 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n", err
);
331 err
= v9fs_fid_add(dentry
, fid
);
334 d_instantiate(dentry
, inode
);
336 /* Now set the ACL based on the default value */
337 v9fs_set_create_acl(dentry
, &dacl
, &pacl
);
339 v9inode
= V9FS_I(inode
);
340 mutex_lock(&v9inode
->v_mutex
);
341 if (v9ses
->cache
&& !v9inode
->writeback_fid
&&
342 ((flags
& O_ACCMODE
) != O_RDONLY
)) {
344 * clone a fid and add it to writeback_fid
345 * we do it during open time instead of
346 * page dirty time via write_begin/page_mkwrite
347 * because we want write after unlink usecase
350 inode_fid
= v9fs_writeback_fid(dentry
);
351 if (IS_ERR(inode_fid
)) {
352 err
= PTR_ERR(inode_fid
);
353 mutex_unlock(&v9inode
->v_mutex
);
354 goto err_clunk_old_fid
;
356 v9inode
->writeback_fid
= (void *) inode_fid
;
358 mutex_unlock(&v9inode
->v_mutex
);
359 /* Since we are opening a file, assign the open fid to the file */
360 filp
= finish_open(od
, dentry
, generic_file_open
);
363 goto err_clunk_old_fid
;
365 filp
->private_data
= ofid
;
366 #ifdef CONFIG_9P_FSCACHE
368 v9fs_cache_inode_set_cookie(inode
, filp
);
377 p9_client_clunk(fid
);
380 p9_client_clunk(ofid
);
381 v9fs_set_create_acl(NULL
, &dacl
, &pacl
);
388 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
389 * @dir: inode that is being unlinked
390 * @dentry: dentry that is being unlinked
391 * @mode: mode for new directory
395 static int v9fs_vfs_mkdir_dotl(struct inode
*dir
,
396 struct dentry
*dentry
, umode_t omode
)
399 struct v9fs_session_info
*v9ses
;
400 struct p9_fid
*fid
= NULL
, *dfid
= NULL
;
406 struct dentry
*dir_dentry
;
407 struct posix_acl
*dacl
= NULL
, *pacl
= NULL
;
409 p9_debug(P9_DEBUG_VFS
, "name %s\n", dentry
->d_name
.name
);
411 v9ses
= v9fs_inode2v9ses(dir
);
414 if (dir
->i_mode
& S_ISGID
)
417 dir_dentry
= dentry
->d_parent
;
418 dfid
= v9fs_fid_lookup(dir_dentry
);
421 p9_debug(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
426 gid
= v9fs_get_fsgid_for_create(dir
);
428 /* Update mode based on ACL value */
429 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
431 p9_debug(P9_DEBUG_VFS
, "Failed to get acl values in mkdir %d\n",
435 name
= (char *) dentry
->d_name
.name
;
436 err
= p9_client_mkdir_dotl(dfid
, name
, mode
, gid
, &qid
);
440 /* instantiate inode and assign the unopened fid to the dentry */
441 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
442 fid
= p9_client_walk(dfid
, 1, &name
, 1);
445 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
451 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
453 err
= PTR_ERR(inode
);
454 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n",
458 err
= v9fs_fid_add(dentry
, fid
);
461 d_instantiate(dentry
, inode
);
465 * Not in cached mode. No need to populate
466 * inode with stat. We need to get an inode
467 * so that we can set the acl with dentry
469 inode
= v9fs_get_inode(dir
->i_sb
, mode
, 0);
471 err
= PTR_ERR(inode
);
474 d_instantiate(dentry
, inode
);
476 /* Now set the ACL based on the default value */
477 v9fs_set_create_acl(dentry
, &dacl
, &pacl
);
479 v9fs_invalidate_inode_attr(dir
);
482 p9_client_clunk(fid
);
483 v9fs_set_create_acl(NULL
, &dacl
, &pacl
);
488 v9fs_vfs_getattr_dotl(struct vfsmount
*mnt
, struct dentry
*dentry
,
492 struct v9fs_session_info
*v9ses
;
494 struct p9_stat_dotl
*st
;
496 p9_debug(P9_DEBUG_VFS
, "dentry: %p\n", dentry
);
498 v9ses
= v9fs_dentry2v9ses(dentry
);
499 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
500 generic_fillattr(dentry
->d_inode
, stat
);
503 fid
= v9fs_fid_lookup(dentry
);
507 /* Ask for all the fields in stat structure. Server will return
508 * whatever it supports
511 st
= p9_client_getattr_dotl(fid
, P9_STATS_ALL
);
515 v9fs_stat2inode_dotl(st
, dentry
->d_inode
);
516 generic_fillattr(dentry
->d_inode
, stat
);
517 /* Change block size to what the server returned */
518 stat
->blksize
= st
->st_blksize
;
527 #define P9_ATTR_MODE (1 << 0)
528 #define P9_ATTR_UID (1 << 1)
529 #define P9_ATTR_GID (1 << 2)
530 #define P9_ATTR_SIZE (1 << 3)
531 #define P9_ATTR_ATIME (1 << 4)
532 #define P9_ATTR_MTIME (1 << 5)
533 #define P9_ATTR_CTIME (1 << 6)
534 #define P9_ATTR_ATIME_SET (1 << 7)
535 #define P9_ATTR_MTIME_SET (1 << 8)
537 struct dotl_iattr_map
{
542 static int v9fs_mapped_iattr_valid(int iattr_valid
)
545 int p9_iattr_valid
= 0;
546 struct dotl_iattr_map dotl_iattr_map
[] = {
547 { ATTR_MODE
, P9_ATTR_MODE
},
548 { ATTR_UID
, P9_ATTR_UID
},
549 { ATTR_GID
, P9_ATTR_GID
},
550 { ATTR_SIZE
, P9_ATTR_SIZE
},
551 { ATTR_ATIME
, P9_ATTR_ATIME
},
552 { ATTR_MTIME
, P9_ATTR_MTIME
},
553 { ATTR_CTIME
, P9_ATTR_CTIME
},
554 { ATTR_ATIME_SET
, P9_ATTR_ATIME_SET
},
555 { ATTR_MTIME_SET
, P9_ATTR_MTIME_SET
},
557 for (i
= 0; i
< ARRAY_SIZE(dotl_iattr_map
); i
++) {
558 if (iattr_valid
& dotl_iattr_map
[i
].iattr_valid
)
559 p9_iattr_valid
|= dotl_iattr_map
[i
].p9_iattr_valid
;
561 return p9_iattr_valid
;
565 * v9fs_vfs_setattr_dotl - set file metadata
566 * @dentry: file whose metadata to set
567 * @iattr: metadata assignment structure
571 int v9fs_vfs_setattr_dotl(struct dentry
*dentry
, struct iattr
*iattr
)
574 struct v9fs_session_info
*v9ses
;
576 struct p9_iattr_dotl p9attr
;
578 p9_debug(P9_DEBUG_VFS
, "\n");
580 retval
= inode_change_ok(dentry
->d_inode
, iattr
);
584 p9attr
.valid
= v9fs_mapped_iattr_valid(iattr
->ia_valid
);
585 p9attr
.mode
= iattr
->ia_mode
;
586 p9attr
.uid
= iattr
->ia_uid
;
587 p9attr
.gid
= iattr
->ia_gid
;
588 p9attr
.size
= iattr
->ia_size
;
589 p9attr
.atime_sec
= iattr
->ia_atime
.tv_sec
;
590 p9attr
.atime_nsec
= iattr
->ia_atime
.tv_nsec
;
591 p9attr
.mtime_sec
= iattr
->ia_mtime
.tv_sec
;
592 p9attr
.mtime_nsec
= iattr
->ia_mtime
.tv_nsec
;
595 v9ses
= v9fs_dentry2v9ses(dentry
);
596 fid
= v9fs_fid_lookup(dentry
);
600 /* Write all dirty data */
601 if (S_ISREG(dentry
->d_inode
->i_mode
))
602 filemap_write_and_wait(dentry
->d_inode
->i_mapping
);
604 retval
= p9_client_setattr(fid
, &p9attr
);
608 if ((iattr
->ia_valid
& ATTR_SIZE
) &&
609 iattr
->ia_size
!= i_size_read(dentry
->d_inode
))
610 truncate_setsize(dentry
->d_inode
, iattr
->ia_size
);
612 v9fs_invalidate_inode_attr(dentry
->d_inode
);
613 setattr_copy(dentry
->d_inode
, iattr
);
614 mark_inode_dirty(dentry
->d_inode
);
615 if (iattr
->ia_valid
& ATTR_MODE
) {
616 /* We also want to update ACL when we update mode bits */
617 retval
= v9fs_acl_chmod(dentry
);
625 * v9fs_stat2inode_dotl - populate an inode structure with stat info
626 * @stat: stat structure
627 * @inode: inode to populate
628 * @sb: superblock of filesystem
633 v9fs_stat2inode_dotl(struct p9_stat_dotl
*stat
, struct inode
*inode
)
636 struct v9fs_inode
*v9inode
= V9FS_I(inode
);
638 if ((stat
->st_result_mask
& P9_STATS_BASIC
) == P9_STATS_BASIC
) {
639 inode
->i_atime
.tv_sec
= stat
->st_atime_sec
;
640 inode
->i_atime
.tv_nsec
= stat
->st_atime_nsec
;
641 inode
->i_mtime
.tv_sec
= stat
->st_mtime_sec
;
642 inode
->i_mtime
.tv_nsec
= stat
->st_mtime_nsec
;
643 inode
->i_ctime
.tv_sec
= stat
->st_ctime_sec
;
644 inode
->i_ctime
.tv_nsec
= stat
->st_ctime_nsec
;
645 inode
->i_uid
= stat
->st_uid
;
646 inode
->i_gid
= stat
->st_gid
;
647 set_nlink(inode
, stat
->st_nlink
);
649 mode
= stat
->st_mode
& S_IALLUGO
;
650 mode
|= inode
->i_mode
& ~S_IALLUGO
;
651 inode
->i_mode
= mode
;
653 i_size_write(inode
, stat
->st_size
);
654 inode
->i_blocks
= stat
->st_blocks
;
656 if (stat
->st_result_mask
& P9_STATS_ATIME
) {
657 inode
->i_atime
.tv_sec
= stat
->st_atime_sec
;
658 inode
->i_atime
.tv_nsec
= stat
->st_atime_nsec
;
660 if (stat
->st_result_mask
& P9_STATS_MTIME
) {
661 inode
->i_mtime
.tv_sec
= stat
->st_mtime_sec
;
662 inode
->i_mtime
.tv_nsec
= stat
->st_mtime_nsec
;
664 if (stat
->st_result_mask
& P9_STATS_CTIME
) {
665 inode
->i_ctime
.tv_sec
= stat
->st_ctime_sec
;
666 inode
->i_ctime
.tv_nsec
= stat
->st_ctime_nsec
;
668 if (stat
->st_result_mask
& P9_STATS_UID
)
669 inode
->i_uid
= stat
->st_uid
;
670 if (stat
->st_result_mask
& P9_STATS_GID
)
671 inode
->i_gid
= stat
->st_gid
;
672 if (stat
->st_result_mask
& P9_STATS_NLINK
)
673 set_nlink(inode
, stat
->st_nlink
);
674 if (stat
->st_result_mask
& P9_STATS_MODE
) {
675 inode
->i_mode
= stat
->st_mode
;
676 if ((S_ISBLK(inode
->i_mode
)) ||
677 (S_ISCHR(inode
->i_mode
)))
678 init_special_inode(inode
, inode
->i_mode
,
681 if (stat
->st_result_mask
& P9_STATS_RDEV
)
682 inode
->i_rdev
= new_decode_dev(stat
->st_rdev
);
683 if (stat
->st_result_mask
& P9_STATS_SIZE
)
684 i_size_write(inode
, stat
->st_size
);
685 if (stat
->st_result_mask
& P9_STATS_BLOCKS
)
686 inode
->i_blocks
= stat
->st_blocks
;
688 if (stat
->st_result_mask
& P9_STATS_GEN
)
689 inode
->i_generation
= stat
->st_gen
;
691 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
692 * because the inode structure does not have fields for them.
694 v9inode
->cache_validity
&= ~V9FS_INO_INVALID_ATTR
;
698 v9fs_vfs_symlink_dotl(struct inode
*dir
, struct dentry
*dentry
,
707 struct p9_fid
*fid
= NULL
;
708 struct v9fs_session_info
*v9ses
;
710 name
= (char *) dentry
->d_name
.name
;
711 p9_debug(P9_DEBUG_VFS
, "%lu,%s,%s\n", dir
->i_ino
, name
, symname
);
712 v9ses
= v9fs_inode2v9ses(dir
);
714 dfid
= v9fs_fid_lookup(dentry
->d_parent
);
717 p9_debug(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
721 gid
= v9fs_get_fsgid_for_create(dir
);
723 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
724 err
= p9_client_symlink(dfid
, name
, (char *)symname
, gid
, &qid
);
727 p9_debug(P9_DEBUG_VFS
, "p9_client_symlink failed %d\n", err
);
731 v9fs_invalidate_inode_attr(dir
);
733 /* Now walk from the parent so we can get an unopened fid. */
734 fid
= p9_client_walk(dfid
, 1, &name
, 1);
737 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
743 /* instantiate inode and assign the unopened fid to dentry */
744 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
746 err
= PTR_ERR(inode
);
747 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n",
751 err
= v9fs_fid_add(dentry
, fid
);
754 d_instantiate(dentry
, inode
);
757 /* Not in cached mode. No need to populate inode with stat */
758 inode
= v9fs_get_inode(dir
->i_sb
, S_IFLNK
, 0);
760 err
= PTR_ERR(inode
);
763 d_instantiate(dentry
, inode
);
768 p9_client_clunk(fid
);
774 * v9fs_vfs_link_dotl - create a hardlink for dotl
775 * @old_dentry: dentry for file to link to
776 * @dir: inode destination for new link
777 * @dentry: dentry for link
782 v9fs_vfs_link_dotl(struct dentry
*old_dentry
, struct inode
*dir
,
783 struct dentry
*dentry
)
787 struct dentry
*dir_dentry
;
788 struct p9_fid
*dfid
, *oldfid
;
789 struct v9fs_session_info
*v9ses
;
791 p9_debug(P9_DEBUG_VFS
, "dir ino: %lu, old_name: %s, new_name: %s\n",
792 dir
->i_ino
, old_dentry
->d_name
.name
, dentry
->d_name
.name
);
794 v9ses
= v9fs_inode2v9ses(dir
);
795 dir_dentry
= dentry
->d_parent
;
796 dfid
= v9fs_fid_lookup(dir_dentry
);
798 return PTR_ERR(dfid
);
800 oldfid
= v9fs_fid_lookup(old_dentry
);
802 return PTR_ERR(oldfid
);
804 name
= (char *) dentry
->d_name
.name
;
806 err
= p9_client_link(dfid
, oldfid
, (char *)dentry
->d_name
.name
);
809 p9_debug(P9_DEBUG_VFS
, "p9_client_link failed %d\n", err
);
813 v9fs_invalidate_inode_attr(dir
);
814 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
815 /* Get the latest stat info from server. */
817 fid
= v9fs_fid_lookup(old_dentry
);
821 v9fs_refresh_inode_dotl(fid
, old_dentry
->d_inode
);
823 ihold(old_dentry
->d_inode
);
824 d_instantiate(dentry
, old_dentry
->d_inode
);
830 * v9fs_vfs_mknod_dotl - create a special file
831 * @dir: inode destination for new link
832 * @dentry: dentry for file
833 * @mode: mode for creation
834 * @rdev: device associated with special file
838 v9fs_vfs_mknod_dotl(struct inode
*dir
, struct dentry
*dentry
, umode_t omode
,
845 struct v9fs_session_info
*v9ses
;
846 struct p9_fid
*fid
= NULL
, *dfid
= NULL
;
849 struct dentry
*dir_dentry
;
850 struct posix_acl
*dacl
= NULL
, *pacl
= NULL
;
852 p9_debug(P9_DEBUG_VFS
, " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n",
853 dir
->i_ino
, dentry
->d_name
.name
, omode
,
854 MAJOR(rdev
), MINOR(rdev
));
856 if (!new_valid_dev(rdev
))
859 v9ses
= v9fs_inode2v9ses(dir
);
860 dir_dentry
= dentry
->d_parent
;
861 dfid
= v9fs_fid_lookup(dir_dentry
);
864 p9_debug(P9_DEBUG_VFS
, "fid lookup failed %d\n", err
);
869 gid
= v9fs_get_fsgid_for_create(dir
);
871 /* Update mode based on ACL value */
872 err
= v9fs_acl_mode(dir
, &mode
, &dacl
, &pacl
);
874 p9_debug(P9_DEBUG_VFS
, "Failed to get acl values in mknod %d\n",
878 name
= (char *) dentry
->d_name
.name
;
880 err
= p9_client_mknod_dotl(dfid
, name
, mode
, rdev
, gid
, &qid
);
884 v9fs_invalidate_inode_attr(dir
);
885 /* instantiate inode and assign the unopened fid to the dentry */
886 if (v9ses
->cache
== CACHE_LOOSE
|| v9ses
->cache
== CACHE_FSCACHE
) {
887 fid
= p9_client_walk(dfid
, 1, &name
, 1);
890 p9_debug(P9_DEBUG_VFS
, "p9_client_walk failed %d\n",
896 inode
= v9fs_get_new_inode_from_fid(v9ses
, fid
, dir
->i_sb
);
898 err
= PTR_ERR(inode
);
899 p9_debug(P9_DEBUG_VFS
, "inode creation failed %d\n",
903 err
= v9fs_fid_add(dentry
, fid
);
906 d_instantiate(dentry
, inode
);
910 * Not in cached mode. No need to populate inode with stat.
911 * socket syscall returns a fd, so we need instantiate
913 inode
= v9fs_get_inode(dir
->i_sb
, mode
, rdev
);
915 err
= PTR_ERR(inode
);
918 d_instantiate(dentry
, inode
);
920 /* Now set the ACL based on the default value */
921 v9fs_set_create_acl(dentry
, &dacl
, &pacl
);
924 p9_client_clunk(fid
);
925 v9fs_set_create_acl(NULL
, &dacl
, &pacl
);
930 * v9fs_vfs_follow_link_dotl - follow a symlink path
931 * @dentry: dentry for symlink
937 v9fs_vfs_follow_link_dotl(struct dentry
*dentry
, struct nameidata
*nd
)
941 char *link
= __getname();
944 p9_debug(P9_DEBUG_VFS
, "%s\n", dentry
->d_name
.name
);
947 link
= ERR_PTR(-ENOMEM
);
950 fid
= v9fs_fid_lookup(dentry
);
953 link
= ERR_CAST(fid
);
956 retval
= p9_client_readlink(fid
, &target
);
958 strcpy(link
, target
);
963 link
= ERR_PTR(retval
);
965 nd_set_link(nd
, link
);
969 int v9fs_refresh_inode_dotl(struct p9_fid
*fid
, struct inode
*inode
)
972 struct p9_stat_dotl
*st
;
973 struct v9fs_session_info
*v9ses
;
975 v9ses
= v9fs_inode2v9ses(inode
);
976 st
= p9_client_getattr_dotl(fid
, P9_STATS_ALL
);
980 * Don't update inode if the file type is different
982 if ((inode
->i_mode
& S_IFMT
) != (st
->st_mode
& S_IFMT
))
985 spin_lock(&inode
->i_lock
);
987 * We don't want to refresh inode->i_size,
988 * because we may have cached data
990 i_size
= inode
->i_size
;
991 v9fs_stat2inode_dotl(st
, inode
);
993 inode
->i_size
= i_size
;
994 spin_unlock(&inode
->i_lock
);
1000 const struct inode_operations v9fs_dir_inode_operations_dotl
= {
1001 .create
= v9fs_vfs_create_dotl
,
1002 .atomic_open
= v9fs_vfs_atomic_open_dotl
,
1003 .lookup
= v9fs_vfs_lookup
,
1004 .link
= v9fs_vfs_link_dotl
,
1005 .symlink
= v9fs_vfs_symlink_dotl
,
1006 .unlink
= v9fs_vfs_unlink
,
1007 .mkdir
= v9fs_vfs_mkdir_dotl
,
1008 .rmdir
= v9fs_vfs_rmdir
,
1009 .mknod
= v9fs_vfs_mknod_dotl
,
1010 .rename
= v9fs_vfs_rename
,
1011 .getattr
= v9fs_vfs_getattr_dotl
,
1012 .setattr
= v9fs_vfs_setattr_dotl
,
1013 .setxattr
= generic_setxattr
,
1014 .getxattr
= generic_getxattr
,
1015 .removexattr
= generic_removexattr
,
1016 .listxattr
= v9fs_listxattr
,
1017 .get_acl
= v9fs_iop_get_acl
,
1020 const struct inode_operations v9fs_file_inode_operations_dotl
= {
1021 .getattr
= v9fs_vfs_getattr_dotl
,
1022 .setattr
= v9fs_vfs_setattr_dotl
,
1023 .setxattr
= generic_setxattr
,
1024 .getxattr
= generic_getxattr
,
1025 .removexattr
= generic_removexattr
,
1026 .listxattr
= v9fs_listxattr
,
1027 .get_acl
= v9fs_iop_get_acl
,
1030 const struct inode_operations v9fs_symlink_inode_operations_dotl
= {
1031 .readlink
= generic_readlink
,
1032 .follow_link
= v9fs_vfs_follow_link_dotl
,
1033 .put_link
= v9fs_vfs_put_link
,
1034 .getattr
= v9fs_vfs_getattr_dotl
,
1035 .setattr
= v9fs_vfs_setattr_dotl
,
1036 .setxattr
= generic_setxattr
,
1037 .getxattr
= generic_getxattr
,
1038 .removexattr
= generic_removexattr
,
1039 .listxattr
= v9fs_listxattr
,