kern/95155: Creation of UFS snapshot turns 'acls' mount option off

[Anatoli Klassen]

>Number:         95155
>Category:       kern
>Synopsis:       Creation of UFS snapshot turns 'acls' mount option off
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Mar 31 14:10:13 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Anatoli Klassen
>Release:        FreeBSD 6.1-PRERELEASE i386
>Organization:
>Environment:
System: FreeBSD mercury.26th.net 6.1-PRERELEASE FreeBSD 6.1-PRERELEASE #0: Wed Mar 22 14:22:35 CET 2006 root at mercury.26th.net:/usr/obj/usr/src/sys/MERCURY i386


>Description:
	I have a file system mounted with 'acls' option. After I create a snapshot of the system
	it loses the 'acls' flag. The same for 'multilabel' option.

	It doesn't hapen if the FS has acls and multilabel enabled by tunefs.

	The bug was not there in 6.1-BETA1, first seen in 6.1-BETA4.

>How-To-Repeat:
	(I've deleted others FS's from mount output)

	# mount -o acls /dev/ad2s5 /mnt
	# mount
	/dev/ad2s5 on /mnt (ufs, local, acls)
	# mount -u -o snapshot /mnt/test_snapshot /mnt
	# mount
	/dev/ad2s5 on /mnt (ufs, local)

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: