Patch "fanotify: Reserve UAPI bits for FAN_FS_ERROR" has been added to the 5.10-stable tree

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This is a note to let you know that I've just added the patch titled

    fanotify: Reserve UAPI bits for FAN_FS_ERROR

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     fanotify-reserve-uapi-bits-for-fan_fs_error.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 5f1f3fbfe806597959f1b380cfeb8c52a5e72937
Author: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
Date:   Mon Oct 25 16:27:33 2021 -0300

    fanotify: Reserve UAPI bits for FAN_FS_ERROR
    
    [ Upstream commit 8d11a4f43ef4679be0908026907a7613b33d7127 ]
    
    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@xxxxxxxxxxxxx
    Reviewed-by: Jan Kara <jack@xxxxxxx>
    Reviewed-by: Amir Goldstein <amir73il@xxxxxxxxx>
    Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
    Signed-off-by: Jan Kara <jack@xxxxxxx>
    Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index c64d61b673caf..8f152445d75c4 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -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);
 
diff --git a/include/uapi/linux/fanotify.h b/include/uapi/linux/fanotify.h
index 64553df9d7350..2990731ddc8bc 100644
--- a/include/uapi/linux/fanotify.h
+++ b/include/uapi/linux/fanotify.h
@@ -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 */




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