fanotify: add API to attach/detach super block mark

Add another mark type flag FAN_MARK_FILESYSTEM for add/remove/flush
of super block mark type.

A super block watch gets all events on the filesystem, regardless of
the mount from which the mark was added, unless an ignore mask exists
on either the inode or the mount where the event was generated.

Only one of FAN_MARK_MOUNT and FAN_MARK_FILESYSTEM mark type flags
may be provided to fanotify_mark() or no mark type flag for inode mark.

Cc: <linux-api@vger.kernel.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 12 insertions, 4 deletions

diff --git a/include/uapi/linux/fanotify.h b/include/uapi/linux/fanotify.h
index 74247917de04..ad81234d1919 100644
--- a/include/uapi/linux/fanotify.h
+++ b/include/uapi/linux/fanotify.h
@@ -27,7 +27,7 @@
 #define FAN_CLOEXEC             0x00000001
 #define FAN_NONBLOCK            0x00000002
 
-/* These are NOT bitwise flags.  Both bits are used togther.  */
+/* These are NOT bitwise flags.  Both bits are used together.  */
 #define FAN_CLASS_NOTIF         0x00000000
 #define FAN_CLASS_CONTENT       0x00000004
 #define FAN_CLASS_PRE_CONTENT   0x00000008
@@ -47,19 +47,27 @@
 #define FAN_MARK_REMOVE         0x00000002
 #define FAN_MARK_DONT_FOLLOW    0x00000004
 #define FAN_MARK_ONLYDIR        0x00000008
-#define FAN_MARK_MOUNT          0x00000010
+/* FAN_MARK_MOUNT is            0x00000010 */
 #define FAN_MARK_IGNORED_MASK   0x00000020
 #define FAN_MARK_IGNORED_SURV_MODIFY    0x00000040
 #define FAN_MARK_FLUSH          0x00000080
+/* FAN_MARK_FILESYSTEM is       0x00000100 */
+
+/* These are NOT bitwise flags.  Both bits can be used togther.  */
+#define FAN_MARK_INODE          0x00000000
+#define FAN_MARK_MOUNT          0x00000010
+#define FAN_MARK_FILESYSTEM     0x00000100
+#define FAN_MARK_TYPE_MASK      (FAN_MARK_INODE | FAN_MARK_MOUNT | \
+                                 FAN_MARK_FILESYSTEM)
 
 #define FAN_ALL_MARK_FLAGS      (FAN_MARK_ADD |\
                                  FAN_MARK_REMOVE |\
                                  FAN_MARK_DONT_FOLLOW |\
                                  FAN_MARK_ONLYDIR |\
-                                 FAN_MARK_MOUNT |\
                                  FAN_MARK_IGNORED_MASK |\
                                  FAN_MARK_IGNORED_SURV_MODIFY |\
-                                 FAN_MARK_FLUSH)
+                                 FAN_MARK_FLUSH|\
+                                 FAN_MARK_TYPE_MASK)
 
 /*
  * All of the events - we build the list by hand so that we can add flags in