Post Syndicated from original https://lwn.net/Articles/887841/

Gabriel Krisman Bertazi describes
the new FAN_FS_ERROR event type added to the fanotify
mechanism in 5.16.

This is why we worked on a new mechanism for closely monitoring
volumes and notifying recovery tools and sysadmins in real-time
that an error occurred. The feature, merged in kernel 5.16, won’t
prevent failures from happening, but will help reduce the effects
of such errors by guaranteeing any listener application receives
the message. A monitoring application can then reliably report it
to system administrators and forward the detailed error information
to whomever is unlucky enough to be tasked with fixing it.