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Date:      Tue, 23 Dec 1997 01:56:23 +1100 (EST)
From:      akm@sneaker.net.au
To:        FreeBSD-gnats-submit@FreeBSD.ORG
Subject:   kern/5362: mount incorrectly reports / as an NFS export
Message-ID:  <199712221456.BAA01511@marty.sneaker.net.au>
Resent-Message-ID: <199712221500.HAA26877@hub.freebsd.org>

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>Number:         5362
>Category:       kern
>Synopsis:       mount incorrectly reports / as an NFS export
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Dec 22 07:00:01 PST 1997
>Last-Modified:
>Originator:     Andrew Milton
>Organization:
Sneaker Net
>Release:        FreeBSD 3.0-971006-SNAP i386
>Environment:
P133 (also on P233MMX)
Adaptec PCI 2940 Ultra Fast Wide Busmaster Adapter
48 Mb RAM
3 x 2.1 IBM Ultra Fast Wide disks.
1 x NEC 3x Speed SCSI CDROM

>Description:

mount incorrectly reports / as being NFS exported when /cdrom is
present in /exports but has not yet been mounted. This tends to scare
people until they realise what has gone wrong :-)

NFS mounting / is not possible.

after mounting /cdrom mount reports correct results.
after umounting /cdrom, mount reports correct results from that point forward.

>How-To-Repeat:
I have this in my /etc/exports:

/export/ftp/FreeBSD/3.0-971006-SNAP
/cdrom -alldirs -mapall=nobody

I am also sharing /cdrom, and /export/dos, and /home/* via samba

root@marty~# mount
/dev/sd0a on / (NFS exported, local)
/dev/sd2s1e on /export (NFS exported, local)
/dev/sd1s1e on /home (local)
/dev/sd0s1f on /usr (local)
/dev/sd0s1e on /var (local)
procfs on /proc (local)

root@marty~# mount /cdrom
root@marty~# mount
/dev/sd0a on / (local)
/dev/sd2s1e on /export (NFS exported, local)
/dev/sd1s1e on /home (local)
/dev/sd0s1f on /usr (local)
/dev/sd0s1e on /var (local)
procfs on /proc (local)
/dev/cd0a on /cdrom (NFS exported, local, read-only)

root@marty~# umount /cdrom
root@marty~# mount
/dev/sd0a on / (local)
/dev/sd2s1e on /export (NFS exported, local)
/dev/sd1s1e on /home (local)
/dev/sd0s1f on /usr (local)
/dev/sd0s1e on /var (local)
procfs on /proc (local)

>Fix:
Unknown.
>Audit-Trail:
>Unformatted:



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