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fanotify: Emit generic error info for error event

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[ Upstream commit 130a3c742107acff985541c28360c8b40203559c ]

The error info is a record sent to users on FAN_FS_ERROR events
documenting the type of error.  It also carries an error count,
documenting how many errors were observed since the last reporting.

Link: https://lore.kernel.org/r/20211025192746.66445-28-krisman@collabora.com
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Gabriel Krisman Bertazi
2021-10-25 16:27:42 -03:00
committed by Greg Kroah-Hartman
parent aefd9029fa
commit b0f01b7c08
4 changed files with 45 additions and 0 deletions
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7
include/uapi/linux/fanotify.h
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@@ -126,6 +126,7 @@ struct fanotify_event_metadata {
#define FAN_EVENT_INFO_TYPE_DFID_NAME 2
#define FAN_EVENT_INFO_TYPE_DFID 3
#define FAN_EVENT_INFO_TYPE_PIDFD 4
#define FAN_EVENT_INFO_TYPE_ERROR 5
/* Variable length info record following event metadata */
struct fanotify_event_info_header {
@@ -160,6 +161,12 @@ struct fanotify_event_info_pidfd {
__s32 pidfd;
};
struct fanotify_event_info_error {
struct fanotify_event_info_header hdr;
__s32 error;
__u32 error_count;
};
struct fanotify_response {
__s32 fd;
__u32 response;