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Date:      Fri, 24 Mar 2017 10:37:59 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 218059] NFS loop back mount of a tmpfs file systems fail, if the tmpfs file systems was mounted with "-o"
Message-ID:  <bug-218059-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D218059

            Bug ID: 218059
           Summary: NFS loop back mount of a tmpfs file systems fail, if
                    the tmpfs file systems was mounted with "-o"
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: pho@FreeBSD.org

$ cat localhost2.sh=20
#!/bin/sh

[ $# -eq 0 ] && localhost=3D127.0.0.1
[ $# -eq 1 ] && localhost=3Dlocalhost

uname -a
ifconfig  | grep inet

[ -d /mnt2 ] || mkdir /mnt2
mount | grep -q mnt2 && umount /mnt2
mount | grep -q mnt && umount /mnt

echo
echo "tmpfs with no \"-o\" argument":
mount -t tmpfs tmpfs /mnt
echo  "mount -t nfs -o retrycnt=3D1 $localhost:/mnt /mnt2"
mount -t nfs -o retrycnt=3D1 $localhost:/mnt /mnt2

mount | grep mnt

mount | grep -q mnt2 && umount /mnt2
mount | grep -q mnt && umount /mnt

echo
echo "Now with tmpfs, size=3D512m:"
mount -t tmpfs -o "size=3D512m" tmpfs /mnt
echo "mount -t nfs -o retrycnt=3D1 $localhost:/mnt /mnt2"
mount -t nfs -o retrycnt=3D1 $localhost:/mnt /mnt2

mount | grep mnt

mount | grep -q mnt2 && umount /mnt2
mount | grep -q mnt && umount /mnt
$ ./localhost2.sh=20
FreeBSD t2.osted.lan 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r315388M: Thu Mar=
 16
08:20:21 CET 2017     pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO  amd64
        inet 192.168.1.109 netmask 0xffffff00 broadcast 192.168.1.255=20
        inet6 fe80::21e:67ff:fe56:b69b%igb0 prefixlen 64 scopeid 0x1=20
        inet6 ::1 prefixlen 128=20
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3=20
        inet 127.0.0.1 netmask 0xff000000=20

tmpfs with no "-o" argument:
mount -t nfs -o retrycnt=3D1 127.0.0.1:/mnt /mnt2
tmpfs on /mnt (tmpfs, local)
127.0.0.1:/mnt on /mnt2 (nfs)

Now with tmpfs, size=3D512m:
mount -t nfs -o retrycnt=3D1 127.0.0.1:/mnt /mnt2
[tcp] 127.0.0.1:/mnt: Permission denied
tmpfs on /mnt (tmpfs, local)
$

--=20
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