Date: Tue, 24 Jul 2001 04:58:32 -0700 (PDT) From: Andrew.P.Lentvorski@FreeBSD.org, "Jr." <buzmeg@hotmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/29191: NFS file locking fails from Solaris 8 client to FreeBSD server Message-ID: <200107241158.f6OBwWj36000@freefall.freebsd.org>
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>Number: 29191
>Category: bin
>Synopsis: NFS file locking fails from Solaris 8 client to FreeBSD server
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jul 24 05:00:31 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: Andrew P. Lentvorski, Jr.
>Release: FreeBSD 4.3-RELEASE #0: Sat Apr 21 10:54:49 GMT 2001
>Organization:
North Shore Circuit Design
>Environment:
FreeBSD daffy.pacbell.net 4.3-RELEASE FreeBSD 4.3-RELEASE #0: Sat Apr 21 10:54:49 GMT 2001 jkh@narf.osd.bsdi.com:/usr/src/sys/compile/GENERIC i386
>Description:
Attempts to use file locking succeed in native filesystems but fail
from a Solaris NFS client to a FreeBSD NFS server.
A simple lock test program (included below) results in the following on
a native filesystem:
bash-2.03# /tmp/locktest
f_rdlck,f_wrlck,f_unlck,seek_set,f_setlk=1,2,3,0,6
File handle: 3
Attempting to lock file...
lock_val = 0
Attempting to unlock file...
lock_val = 0
but the following when run on an NFS filesystem:
bash-2.03# /tmp/locktest
f_rdlck,f_wrlck,f_unlck,seek_set,f_setlk=1,2,3,0,6
File handle: 3
Attempting to lock file...
After trying to lock : Invalid argument
lock_val = -1
Attempting to unlock file...
After trying to lock : Invalid argument
lock_val = -1
A dump from ethereal watching the traffic is as follows:
(daffy is the FreeBSD server, foghorn is the Solaris client)
No. Time Source Destination Protocol Info
1 0.000000 foghorn daffy NFS V3 GETATTR Call XID 0xc59176e
2 0.000127 daffy foghorn NFS V3 GETATTR Reply XID 0xc59176e
3 0.000487 foghorn daffy NFS V3 LOOKUP Call XID 0xc59176f
4 0.000586 daffy foghorn NFS V3 LOOKUP Reply XID 0xc59176f
5 0.000872 foghorn daffy NFS V3 ACCESS Call XID 0xc591770
6 0.000920 daffy foghorn NFS V3 ACCESS Reply XID 0xc591770
7 0.001324 foghorn daffy Portmap V2 GETPORT Call XID 0xc591771
8 0.001650 daffy foghorn Portmap V2 GETPORT Reply XID 0xc591771
9 0.001875 foghorn daffy NLM V4 LOCK Call XID 0xc591772
10 0.001986 daffy foghorn NLM V4 LOCK Reply XID 0xc591772[Malformed Frame]
11 0.002773 foghorn daffy Portmap V2 GETPORT Call XID 0xc591773
12 0.002985 daffy foghorn Portmap V2 GETPORT Reply XID 0xc591773
13 0.003206 foghorn daffy NLM V4 UNLOCK Call XID 0xc591774
14 0.003295 daffy foghorn NLM V4 UNLOCK Reply XID 0xc591774[Malformed Frame]
15 0.003677 foghorn daffy Portmap V2 GETPORT Call XID 0xc591775
16 0.003865 daffy foghorn Portmap V2 GETPORT Reply XID 0xc591775
17 0.004087 foghorn daffy NLM V4 UNLOCK Call XID 0xc591776
18 0.004171 daffy foghorn NLM V4 UNLOCK Reply XID 0xc591776[Malformed Frame]
19 0.099076 foghorn daffy TCP 1020 > 1022 [ACK] Seq=766665452 Ack=194196698 Win=24820 Len=0
20 0.099099 foghorn daffy TCP 1021 > sunrpc [ACK] Seq=766469072 Ack=173822409 Win=24820 Len=0
21 0.099123 foghorn daffy TCP 1022 > nfsd [ACK] Seq=716857650 Ack=638087445 Win=24820 Len=0
And a dump from the rpcinfo is as follows:
daffy# rpcinfo -p
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100021 1 udp 1010 nlockmgr
100021 3 udp 1010 nlockmgr
100021 1 tcp 1022 nlockmgr
100021 3 tcp 1022 nlockmgr
100024 1 udp 1004 status
100024 1 tcp 1021 status
100005 3 udp 882 mountd
100005 3 tcp 1002 mountd
100005 1 udp 882 mountd
100005 1 tcp 1002 mountd
The problem is easily repeatable by running the program included at the end
of this report.
This all started when I was trying to get a FreeBSD RAID server to take
over our storage tasks. Cadence (a VLSI CAD vendor) tools require fcntl
locks to work. If I cannot fix this problem, I will have to dump BSD as a
storage solution. Furthermore, I'm on a short timeline to bring everything
up. Consequently, if there are flags which I can give to Solaris to make it do
the right thing (or even a substitute until FreeBSD is fixed), I would be open
to using those as well.
Incidentally, FreeBSD -> FreeBSD NFS locking seems to work and Solaris ->
Solaris NFS locking also seems to work.
Please feel free to contact me if you need any further data.
Thanks,
-a
NFS locking test program:
#include <stdio.h>
#include <fcntl.h>
#include <sys/file.h>
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
main()
{
int fh, lock_val;
struct flock fl;
printf("f_rdlck,f_wrlck,f_unlck,seek_set,f_setlk=%d,%d,%d,%d,%d\n",
F_RDLCK,F_WRLCK,F_UNLCK,SEEK_SET,F_SETLK);
fh = open("cache.file", O_RDWR|O_CREAT, 0644);
printf("File handle: %d\n",fh);
fl.l_type = F_WRLCK;
fl.l_whence = SEEK_SET;
fl.l_start = fl.l_len = 0L;
printf("Attempting to lock file...\n");
lock_val = fcntl (fh, F_SETLK, &fl);
if (lock_val == -1)
{
perror("After trying to lock ");
}
printf("lock_val = %d\n",lock_val);
printf("Attempting to unlock file...\n");
fl.l_type = F_UNLCK;
lock_val = fcntl (fh, F_SETLK, &fl);
if (lock_val == -1)
{
perror("After trying to lock ");
}
printf("lock_val = %d\n",lock_val);
close(fh);
}
>How-To-Repeat:
Run the following program in an NFS directory on a Solaris client which
has been exported from a FreeBSD server:
#include <stdio.h>
#include <fcntl.h>
#include <sys/file.h>
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
main()
{
int fh, lock_val;
struct flock fl;
printf("f_rdlck,f_wrlck,f_unlck,seek_set,f_setlk=%d,%d,%d,%d,%d\n",
F_RDLCK,F_WRLCK,F_UNLCK,SEEK_SET,F_SETLK);
fh = open("cache.file", O_RDWR|O_CREAT, 0644);
printf("File handle: %d\n",fh);
fl.l_type = F_WRLCK;
fl.l_whence = SEEK_SET;
fl.l_start = fl.l_len = 0L;
printf("Attempting to lock file...\n");
lock_val = fcntl (fh, F_SETLK, &fl);
if (lock_val == -1)
{
perror("After trying to lock ");
}
printf("lock_val = %d\n",lock_val);
printf("Attempting to unlock file...\n");
fl.l_type = F_UNLCK;
lock_val = fcntl (fh, F_SETLK, &fl);
if (lock_val == -1)
{
perror("After trying to lock ");
}
printf("lock_val = %d\n",lock_val);
close(fh);
}
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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