Commit 8d11a4f4 authored by Gabriel Krisman Bertazi's avatar Gabriel Krisman Bertazi Committed by Jan Kara
Browse files

fanotify: Reserve UAPI bits for FAN_FS_ERROR 

FAN_FS_ERROR allows reporting of event type FS_ERROR to userspace, which
is a mechanism to report file system wide problems via fanotify.  This
commit preallocate userspace visible bits to match the FS_ERROR event.

Link: https://lore.kernel.org/r/20211025192746.66445-19-krisman@collabora.com


Reviewed-by: default avatarJan Kara <jack@suse.cz>
Reviewed-by: default avatarAmir Goldstein <amir73il@gmail.com>
Signed-off-by: default avatarGabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 9daa8110

fs/notify/fanotify/fanotify.c

+1 −0
Original line number Diff line number Diff line
@@ -752,6 +752,7 @@ static int fanotify_handle_event(struct fsnotify_group *group, u32 mask, 
	BUILD_BUG_ON(FAN_ONDIR != FS_ISDIR);

	BUILD_BUG_ON(FAN_OPEN_EXEC != FS_OPEN_EXEC);

	BUILD_BUG_ON(FAN_OPEN_EXEC_PERM != FS_OPEN_EXEC_PERM);

	BUILD_BUG_ON(FAN_FS_ERROR != FS_ERROR);



	BUILD_BUG_ON(HWEIGHT32(ALL_FANOTIFY_EVENT_BITS) != 19);

include/uapi/linux/fanotify.h

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#define FAN_OPEN_EXEC		0x00001000	/* File was opened for exec */



#define FAN_Q_OVERFLOW		0x00004000	/* Event queued overflowed */

#define FAN_FS_ERROR		0x00008000	/* Filesystem error */



#define FAN_OPEN_PERM		0x00010000	/* File open in perm check */

#define FAN_ACCESS_PERM		0x00020000	/* File accessed in perm check */