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From: Miklos Szeredi <miklos@szeredi.hu>
To: Trond Myklebust <Trond.Myklebust@netapp.com>
Subject: NFSv4: truncate returns I/O error
CC: linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org
Date: Tue, 06 Mar 2012 11:10:11 +0100
Message-ID: <87k42yjb0c.fsf@tucsk.pomaz.szeredi.hu>
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Sender: linux-nfs-owner@vger.kernel.org
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The attached test program reliably fails on an NFSv4 mount.

# mount -tnfs -onfsvers=4 127.0.0.1:/ /mnt/nfs
# ./truncate-test /mnt/nfs/tmp/xyz
truncate: Input/output error

Thanks,
Miklos


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Content-Type: text/x-csrc
Content-Disposition: inline; filename=truncate-test.c

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

int main(int argc, char *argv[])
{
	int res;
	char *name = argv[1];

	unlink(name);
	close(open(name, O_WRONLY | O_CREAT, 0644));
	close(open(name, O_RDONLY));

	res = truncate(name, 1);
	if (res == -1) {
		perror("truncate");
		return 1;
	}
    return 0;
}

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