From: "J.A. Magallon" <jamagallon@able.es>
To: Lista Linux-Kernel <linux-kernel@vger.kernel.org>
Subject: Locking over NFS
Date: Fri, 28 Nov 2003 00:09:37 +0100 [thread overview]
Message-ID: <20031127230937.GA23147@werewolf.able.es> (raw)
Hi all...
Is locking via lockf/fcntl supposed to work over NFS mounted volumes
in 2.4 ?
I can't get it to work, even if kernel [lockd] is running in the server.
Server locks the file, and client gets an error:
annwn:~/dev/lk> lockf 10000
locked
<switch term>
annwn:~/dev/lk> bpsh 0 lockf
lockf:F_LOCK: No locks available
lockf.c:
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
int main(int argc, char** argv)
{
int fd;
fd = open("lock",O_RDWR);
if (fd<0)
perror("open");
if (lockf(fd,F_LOCK,0)<0)
perror("lockf:F_LOCK");
else
printf("locked\n");
fflush(stdout);
if (argc>1)
sleep(atoi(argv[1]));
if (lockf(fd,F_ULOCK,0)<0)
perror("lockf:F_ULOCK");
else
printf("unlocked\n");
fflush(stdout);
return 0;
}
TIA
--
J.A. Magallon <jamagallon()able!es> \ Software is like sex:
werewolf!able!es \ It's better when it's free
Mandrake Linux release 10.0 (Cooker) for i586
Linux 2.4.23-rc5-jam1 (gcc 3.3.1 (Mandrake Linux 9.2 3.3.1-4mdk))
next reply other threads:[~2003-11-27 23:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-27 23:09 J.A. Magallon [this message]
2003-11-28 1:01 ` Locking over NFS Trond Myklebust
2003-11-28 1:12 ` Trond Myklebust
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