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authorAl Viro <viro@zeniv.linux.org.uk>2011-03-15 01:56:51 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-15 02:12:20 +0300
commitf52e0c11305aa09ed56cad97ffc8f0cdc3d78b5d (patch)
treeb04070034f8a941fe5d7e9e1b335a02784686bd5 /include/linux
parent5fe0c2378884e68beb532f5890cc0e3539ac747b (diff)
downloadlinux-f52e0c11305aa09ed56cad97ffc8f0cdc3d78b5d.tar.xz
New AT_... flag: AT_EMPTY_PATH
For name_to_handle_at(2) we'll want both ...at()-style syscall that would be usable for non-directory descriptors (with empty relative pathname). Introduce new flag (AT_EMPTY_PATH) to deal with that and corresponding LOOKUP_EMPTY; teach user_path_at() and path_init() to deal with the latter. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/fcntl.h1
-rw-r--r--include/linux/namei.h1
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/fcntl.h b/include/linux/fcntl.h
index a562fa5fb4e3..f550f894ba15 100644
--- a/include/linux/fcntl.h
+++ b/include/linux/fcntl.h
@@ -46,6 +46,7 @@
unlinking file. */
#define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */
#define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount traversal */
+#define AT_EMPTY_PATH 0x1000 /* Allow empty relative pathname */
#ifdef __KERNEL__
diff --git a/include/linux/namei.h b/include/linux/namei.h
index 83cd6e5cd7dc..9c8603872c36 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -64,6 +64,7 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND};
#define LOOKUP_JUMPED 0x1000
#define LOOKUP_ROOT 0x2000
+#define LOOKUP_EMPTY 0x4000
extern int user_path_at(int, const char __user *, unsigned, struct path *);