svn commit: r364403 - head/sbin/devd
Warner Losh
imp at FreeBSD.org
Wed Aug 19 17:10:16 UTC 2020
Author: imp
Date: Wed Aug 19 17:10:09 2020
New Revision: 364403
URL: https://svnweb.freebsd.org/changeset/base/364403
Log:
Document the VFS FS events
MOUNT notifies when a filesystem is mounted
REMOUNT notifies when a filesystem is mounted again
UNMOUNT notifies when a filesystem is unmounted
These events are asynchronous to the actual state of the event (though the data
is recorded at a time when it is stable). The mount event is reported after the
filesystem is mounted. However, in the interim it may be unmounted by another
agent. Likewise, umount is called just before the mountpoint is finished tearing
down. It may be remounted (or maybe if the process scheduling is wonky and devd
gets to run before the last few steps are complete).
Sponsored by: Netflix
Diffential Revision: https://reviews.freebsd.org/D25969
Modified:
head/sbin/devd/devd.conf.5
Modified: head/sbin/devd/devd.conf.5
==============================================================================
--- head/sbin/devd/devd.conf.5 Wed Aug 19 17:10:04 2020 (r364402)
+++ head/sbin/devd/devd.conf.5 Wed Aug 19 17:10:09 2020 (r364403)
@@ -573,6 +573,20 @@ USB interface is detached from a device.
.Pp
.Bl -column "System" "Subsystem" "1234567" -compact
.Sy "System" Ta Sy "Subsystem" Ta Sy "Type" Ta Sy "Description"
+.It Li VFS Ta Ta Ta
+Events from the vfs system.
+.It Li VFS Ta Li FS Ta Ta
+Events that change what is mounted to the system.
+.It Li VFS Ta Li FS Ta Li MOUNT Ta
+Notification of a filesystem is mounted for the first time.
+.It Li VFS Ta Li FS Ta Li REMOUNT Ta
+Notification of a filesystem is remounted (whether or not the options actually change).
+.It Li VFS Ta Li FS Ta Li UNMOUNT Ta
+Notification of a filesystem being unmounted.
+.El
+.Pp
+.Bl -column "System" "Subsystem" "1234567" -compact
+.Sy "System" Ta Sy "Subsystem" Ta Sy "Type" Ta Sy "Description"
.It Li ZFS Ta ZFS Ta Ta
Events about the ZFS subsystem.
See
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