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| author | Miklos Szeredi <mszeredi@suse.cz> | 2010-08-10 11:41:36 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2010-08-11 00:28:20 -0400 |
| commit | f7ad3c6be90809b53b7f0ae9d4eaa45ce2564a79 (patch) | |
| tree | dc9b09188bab35320200f318b5e7b52f24dc43ad /include/linux/fs_struct.h | |
| parent | 542ce7a9bc6b3838832ae0f4f8de30c667af8ff3 (diff) | |
| download | linux-f7ad3c6be90809b53b7f0ae9d4eaa45ce2564a79.tar.gz linux-f7ad3c6be90809b53b7f0ae9d4eaa45ce2564a79.tar.bz2 linux-f7ad3c6be90809b53b7f0ae9d4eaa45ce2564a79.zip | |
vfs: add helpers to get root and pwd
Add three helpers that retrieve a refcounted copy of the root and cwd
from the supplied fs_struct.
get_fs_root()
get_fs_pwd()
get_fs_root_and_pwd()
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/fs_struct.h')
| -rw-r--r-- | include/linux/fs_struct.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h index 78a05bfcd8eb..eca3d5202138 100644 --- a/include/linux/fs_struct.h +++ b/include/linux/fs_struct.h @@ -21,4 +21,31 @@ extern void free_fs_struct(struct fs_struct *); extern void daemonize_fs_struct(void); extern int unshare_fs_struct(void); +static inline void get_fs_root(struct fs_struct *fs, struct path *root) +{ + read_lock(&fs->lock); + *root = fs->root; + path_get(root); + read_unlock(&fs->lock); +} + +static inline void get_fs_pwd(struct fs_struct *fs, struct path *pwd) +{ + read_lock(&fs->lock); + *pwd = fs->pwd; + path_get(pwd); + read_unlock(&fs->lock); +} + +static inline void get_fs_root_and_pwd(struct fs_struct *fs, struct path *root, + struct path *pwd) +{ + read_lock(&fs->lock); + *root = fs->root; + path_get(root); + *pwd = fs->pwd; + path_get(pwd); + read_unlock(&fs->lock); +} + #endif /* _LINUX_FS_STRUCT_H */ |