| From | Valerie Aurora <> | Subject | [PATCH 16/34] union-mount: Create IS_MNT_UNION() | Date | Thu, 16 Sep 2010 15:12:07 -0700 |
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From: Jan Blunck <jblunck@suse.de>
IS_MNT_UNION() tests whether a vfsmount is a union. Note that a directory in a union mounted file system is not necessarily unioned. Use IS_DIR_UNIONED() to test that.
Signed-off-by: Valerie Aurora <vaurora@redhat.com> --- fs/union.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/fs/union.h b/fs/union.h index 1692803..c496823 100644 --- a/fs/union.h +++ b/fs/union.h @@ -49,6 +49,7 @@ struct union_stack { struct path u_dirs[0]; }; +#define IS_MNT_UNION(mnt) ((mnt)->mnt_flags & MNT_UNION) #define IS_DIR_UNIONED(dentry) ((dentry)->d_union_stack) extern void d_free_unions(struct dentry *); @@ -64,6 +65,7 @@ static inline struct path *union_find_dir(struct dentry *dentry, #else /* CONFIG_UNION_MOUNT */ +#define IS_MNT_UNION(x) (0) #define IS_DIR_UNIONED(x) (0) #define d_free_unions(x) do { } while (0) -- 1.6.3.3
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