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authorMiklos Szeredi <mszeredi@suse.cz>2010-08-10 11:41:36 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2010-08-11 00:28:20 -0400
commitf7ad3c6be90809b53b7f0ae9d4eaa45ce2564a79 (patch)
treedc9b09188bab35320200f318b5e7b52f24dc43ad /include/linux/fs_struct.h
parent542ce7a9bc6b3838832ae0f4f8de30c667af8ff3 (diff)
downloadvexpress-lsk-f7ad3c6be90809b53b7f0ae9d4eaa45ce2564a79.tar.gz
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.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h
index 78a05bfcd8e..eca3d520213 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 */