Date: Thu, 20 Jan 2000 15:16:02 -0800 (PST) From: kannanv@research.bell-labs.com To: freebsd-gnats-submit@FreeBSD.org Subject: kern/16239: NFS mount file system from multi-homed remote host sometimes fails Message-ID: <20000120231602.0E2DB14BED@hub.freebsd.org>
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>Number: 16239
>Category: kern
>Synopsis: NFS mount file system from multi-homed remote host sometimes fails
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Jan 20 15:20:01 PST 2000
>Closed-Date:
>Last-Modified:
>Originator: Kannan Varadhan
>Release: 3.3-RELEASE
>Organization:
Lucent Technologies, Bell Lans
>Environment:
yankees# uname -a
FreeBSD yankees.mlb.research.bell-labs.com 3.3-RELEASE FreeBSD 3.3-RELEASE #0: Fri Oct 22 11:38:58 EDT 1999 root@dodgers.mlb.research.bell-labs.com:/usr/src/sys/compile/MH2A235 i386
>Description:
Remote host has interfaces: 135.104.73.11/29, 135.104.73.129/29;
Remote filesystem is /dev/wd0s4e mounted on /local
Local host is 135.104.73.82/29.
135.104.73.11 is nearest interface through multiple hops.
From local host: mount 135.104.73.11:/local /mnt succeeds, but
mount 135.104.73.129:/local /mnt fails.
FYI, the /etc/exports file on remote host is (although this appears irrelevant),
yankees# more /etc/exports
/local -alldirs -maproot=0 -network=135.104.73 -mask=255.255.255.0
/local -alldirs -maproot=0 -network=135.180.182 -mask=255.255.255.0
/local -alldirs -maproot=0 malgudi.dnrc.bell-labs.com
/local -alldirs -maproot=0 malgudi.research.bell-labs.com
/local -alldirs -maproot=0 kannanvpc.research.bell-labs.com
/cdrom
------------------------------------------------------------------------
A tcpdump trace on remote host shows the following (There are multiple sequences of
sunrpc and nfs requests back and forth, but this one appears to indicate
the problem:
16:31:54.084947 0:90:27:61:e7:99 0:50:4:b1:f0:90 0800 162: 135.104.73.82.2094666972 > 135.104.73.129.2049: 120 getattr [|nfs]
4500 0094 012d 0000 3d11 da88 8768 4952
8768 4981 03e5 0801 0080 d6a1 7cda 14dc
0000 0000 0000 0002 0001 86a3 0000 0003
0000 0001 0000
16:31:54.085012 0:50:4:b1:f0:90 0:60:1d:9:0:5a 0800 154: 135.104.73.11.2049 > 135.104.73.82.2094666972: reply ok 112 getattr [|nfs]
4500 008c 0194 0000 4011 d79f 8768 490b
8768 4952 0801 03e5 0078 152e 7cda 14dc
0000 0001 0000 0000 0000 0000 0000 0000
0000 0000 0000
16:31:54.085486 0:60:1d:9:0:5a 0:50:4:b1:f0:90 0800 70: 135.104.73.82 > 135.104.73.11: icmp: 135.104.73.82 udp port 997 unreachable
4500 0038 012e 0000 fd01 1b69 8768 4952
8768 490b 0303 5e31 0000 0000 4500 008c
9401 0000 3e11 d99f 8768 490b 8768 4952
0801 03e5 0078
I have the full tcpdump traces of both the success and failure conditions are
on request.
>How-To-Repeat:
Have a multi-homed host as above; attempt to mount a filesystem by
explicitly specifying the addresses of different interfaces.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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