Hello,
I'm experiencing strange problem with case sensitivity of files on NFS3
filesystem. I want to backup my server to a NAS device. The server is:
Linux rtime 2.6.25-gentoo-r8 #6 SMP Thu Oct 9 13:00:08 CEST 2008 i686
and NAS is:
Linux RtimeBackup 2.6.15 #722 Fri Sep 19 20:23:15 CST 2008 armv5tejl unknown
I would like to use rdiff-backup tool, which checks for case sensitivity of
the target filesystem. The technique it uses to check this is the same as in
this file:
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
int main()
{
int fd;
struct stat st;
fd = open("A", O_WRONLY|O_CREAT|O_TRUNC, 0666);
perror("1. open(A)"); errno=0;
if (fd == -1) {
exit(1);
}
close(fd);
lstat("A", &st);
perror("2. lstat(A)"); errno=0;
lstat("a", &st);
perror("3. lstat(a)"); errno=0;
unlink("a");
perror("4. unlink(a)"); errno=0;
lstat("A", &st);
perror("5. lstat(A)"); errno=0;
lstat("a", &st);
perror("6. lstat(a)"); errno=0;
}
The expected output of this program is:
1. open(A): Success
2. lstat(A): Success
3. lstat(a): No such file or directory
4. unlink(a): No such file or directory
5. lstat(A): Success
6. lstat(a): No such file or directory
On NFS, I sometimes get the following (neither "A" nor "a" files existed
before execution):
1. open(A): Success
2. lstat(A): Success
3. lstat(a): Success
4. unlink(a): Success
5. lstat(A): Stale NFS file handle
6. lstat(a): No such file or directory
This happens when the program is run for the first time. When I run it for the
second time, I get the expected output and file "A" is created. After I
remove the A file, I get the "wrong" output again.
Does anybody know, what is causing this behavior?
Thanks
Michal
P.S.: Please CC me when replying.
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