Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
L
linux
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Issues
0
Issues
0
List
Boards
Labels
Milestones
Merge Requests
0
Merge Requests
0
Analytics
Analytics
Repository
Value Stream
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Create a new issue
Commits
Issue Boards
Open sidebar
Kirill Smelkov
linux
Commits
134e9731
Commit
134e9731
authored
Mar 25, 2007
by
Chris Mason
Committed by
David Woodhouse
Mar 25, 2007
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
Btrfs: unlink and delete_inode
Signed-off-by:
Chris Mason
<
chris.mason@oracle.com
>
parent
78fae27e
Changes
1
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
114 additions
and
3 deletions
+114
-3
fs/btrfs/super.c
fs/btrfs/super.c
+114
-3
No files found.
fs/btrfs/super.c
View file @
134e9731
...
...
@@ -187,6 +187,104 @@ static void btrfs_read_locked_inode(struct inode *inode)
return
;
}
static
int
btrfs_unlink
(
struct
inode
*
dir
,
struct
dentry
*
dentry
)
{
struct
btrfs_path
path
;
struct
btrfs_root
*
root
;
struct
btrfs_trans_handle
*
trans
;
const
char
*
name
=
dentry
->
d_name
.
name
;
int
name_len
=
dentry
->
d_name
.
len
;
int
ret
;
u64
objectid
;
struct
btrfs_dir_item
*
di
;
btrfs_init_path
(
&
path
);
root
=
btrfs_sb
(
dir
->
i_sb
);
mutex_lock
(
&
root
->
fs_info
->
fs_mutex
);
trans
=
btrfs_start_transaction
(
root
,
1
);
ret
=
btrfs_lookup_dir_item
(
trans
,
root
,
&
path
,
dir
->
i_ino
,
name
,
name_len
,
-
1
);
if
(
ret
<
0
)
goto
err
;
if
(
ret
>
0
)
{
ret
=
-
ENOENT
;
goto
err
;
}
di
=
btrfs_item_ptr
(
btrfs_buffer_leaf
(
path
.
nodes
[
0
]),
path
.
slots
[
0
],
struct
btrfs_dir_item
);
objectid
=
btrfs_dir_objectid
(
di
);
ret
=
btrfs_del_item
(
trans
,
root
,
&
path
);
BUG_ON
(
ret
);
dentry
->
d_inode
->
i_ctime
=
dir
->
i_ctime
;
err:
btrfs_release_path
(
root
,
&
path
);
btrfs_end_transaction
(
trans
,
root
);
mutex_unlock
(
&
root
->
fs_info
->
fs_mutex
);
if
(
ret
==
0
)
inode_dec_link_count
(
dentry
->
d_inode
);
return
ret
;
}
static
int
btrfs_free_inode
(
struct
btrfs_trans_handle
*
trans
,
struct
btrfs_root
*
root
,
struct
inode
*
inode
)
{
u64
objectid
=
inode
->
i_ino
;
struct
btrfs_path
path
;
struct
btrfs_inode_map_item
*
map
;
struct
btrfs_key
stat_data_key
;
int
ret
;
clear_inode
(
inode
);
btrfs_init_path
(
&
path
);
ret
=
btrfs_lookup_inode_map
(
trans
,
root
,
&
path
,
objectid
,
-
1
);
if
(
ret
)
{
if
(
ret
>
0
)
ret
=
-
ENOENT
;
btrfs_release_path
(
root
,
&
path
);
goto
error
;
}
map
=
btrfs_item_ptr
(
btrfs_buffer_leaf
(
path
.
nodes
[
0
]),
path
.
slots
[
0
],
struct
btrfs_inode_map_item
);
btrfs_disk_key_to_cpu
(
&
stat_data_key
,
&
map
->
key
);
ret
=
btrfs_del_item
(
trans
,
root
->
fs_info
->
inode_root
,
&
path
);
BUG_ON
(
ret
);
btrfs_release_path
(
root
,
&
path
);
btrfs_init_path
(
&
path
);
ret
=
btrfs_lookup_inode
(
trans
,
root
,
&
path
,
objectid
,
-
1
);
BUG_ON
(
ret
);
ret
=
btrfs_del_item
(
trans
,
root
,
&
path
);
BUG_ON
(
ret
);
btrfs_release_path
(
root
,
&
path
);
error:
return
ret
;
}
static
void
btrfs_delete_inode
(
struct
inode
*
inode
)
{
struct
btrfs_trans_handle
*
trans
;
struct
btrfs_root
*
root
=
btrfs_sb
(
inode
->
i_sb
);
truncate_inode_pages
(
&
inode
->
i_data
,
0
);
if
(
is_bad_inode
(
inode
))
{
goto
no_delete
;
}
inode
->
i_size
=
0
;
if
(
inode
->
i_blocks
)
WARN_ON
(
1
);
mutex_lock
(
&
root
->
fs_info
->
fs_mutex
);
trans
=
btrfs_start_transaction
(
root
,
1
);
btrfs_free_inode
(
trans
,
root
,
inode
);
btrfs_end_transaction
(
trans
,
root
);
mutex_unlock
(
&
root
->
fs_info
->
fs_mutex
);
return
;
no_delete:
clear_inode
(
inode
);
}
static
int
btrfs_inode_by_name
(
struct
inode
*
dir
,
struct
dentry
*
dentry
,
ino_t
*
ino
)
{
...
...
@@ -272,6 +370,13 @@ static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
leaf
=
btrfs_buffer_leaf
(
path
.
nodes
[
0
]);
nritems
=
btrfs_header_nritems
(
&
leaf
->
header
);
slot
=
path
.
slots
[
0
];
#if 0
page_cache_readahead(
inode->i_sb->s_bdev->bd_inode->i_mapping,
&filp->f_ra, filp,
path.nodes[0]->b_blocknr >>
(PAGE_CACHE_SHIFT - inode->i_blkbits), 1);
#endif
}
else
{
slot
++
;
path
.
slots
[
0
]
++
;
...
...
@@ -441,8 +546,6 @@ static int btrfs_add_nondir(struct btrfs_trans_handle *trans,
d_instantiate
(
dentry
,
inode
);
return
0
;
}
inode_dec_link_count
(
inode
);
iput
(
inode
);
return
err
;
}
...
...
@@ -453,6 +556,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
struct
btrfs_root
*
root
=
btrfs_sb
(
dir
->
i_sb
);
struct
inode
*
inode
;
int
err
;
int
drop_inode
=
0
;
mutex_lock
(
&
root
->
fs_info
->
fs_mutex
);
trans
=
btrfs_start_transaction
(
root
,
1
);
...
...
@@ -462,10 +566,16 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
goto
out_unlock
;
// FIXME mark the inode dirty
err
=
btrfs_add_nondir
(
trans
,
dentry
,
inode
);
if
(
err
)
drop_inode
=
1
;
dir
->
i_sb
->
s_dirt
=
1
;
btrfs_end_transaction
(
trans
,
root
);
out_unlock:
mutex_unlock
(
&
root
->
fs_info
->
fs_mutex
);
if
(
drop_inode
)
{
inode_dec_link_count
(
inode
);
iput
(
inode
);
}
return
err
;
}
...
...
@@ -516,7 +626,7 @@ static struct file_system_type btrfs_fs_type = {
static
struct
super_operations
btrfs_super_ops
=
{
.
statfs
=
simple_statfs
,
.
d
rop_inode
=
generic
_delete_inode
,
.
d
elete_inode
=
btrfs
_delete_inode
,
.
put_super
=
btrfs_put_super
,
.
read_inode
=
btrfs_read_locked_inode
,
.
write_super
=
btrfs_write_super
,
...
...
@@ -526,6 +636,7 @@ static struct super_operations btrfs_super_ops = {
static
struct
inode_operations
btrfs_dir_inode_operations
=
{
.
lookup
=
btrfs_lookup
,
.
create
=
btrfs_create
,
.
unlink
=
btrfs_unlink
,
};
static
struct
file_operations
btrfs_dir_file_operations
=
{
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment