Date: Fri, 11 Sep 1998 09:27:44 -0400 (EDT) From: seth@freebie.dp.ny.frb.org To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: bin/7895: multiple identical NFS mounts accepted Message-ID: <199809111327.JAA15754@freebie.dp.ny.frb.org>
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>Number: 7895
>Category: bin
>Synopsis: multiple identical NFS mounts accepted
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Sep 11 06:30:01 PDT 1998
>Last-Modified:
>Originator: Zippy
>Organization:
none
>Release: FreeBSD 2.2.7-RELEASE i386
>Environment:
>Description:
multiple identical nfs mounts (from the same exported fs to the same
mountpoint) are accepted and each is given an entry in 'mount' output.
>How-To-Repeat:
easy. Two ways:
have an nfs mount in /etc/fstab, and do a mount -a twice, or manually
nfs-mount the same fs twice:
# mount netserv3:/export/freebie/usr/packages-2.2.7 /usr/packages
# mount netserv3:/export/freebie/usr/packages-2.2.7 /usr/packages
# mount
/dev/wd0s1a on / (local)
/dev/wd0s1f on /tmp (local)
/dev/wd0s1g on /usr (NFS exported, local)
/dev/wd0s1e on /var (local)
netserv3:/export/freebie/usr/packages-2.2.7 on /usr/packages
netserv3:/export/freebie/usr/backup on /usr/backup
procfs on /proc (local)
netserv3:/export/freebie/usr/packages-2.2.7 on /usr/packages
Umounting /usr/packages will umount the most-recently-mounted instance.
Add'l info:
# what `which mount`
/sbin/mount:
Copyright (c) 1980, 1989, 1993, 1994
mount.c 8.19 (Berkeley) 4/19/94
Copyright (c) 1993, 1994
mount_ufs.c 8.2 (Berkeley) 3/27/94
getmntopts.c 8.1 (Berkeley) 3/27/94
>Fix:
Don't know exactly, but mount needs to check to see that the mountpoint isn't
already being used as such.
>Audit-Trail:
>Unformatted:
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