* vfs bug. was: Re: [NFS] 2.6.8.1 kernel NFS client connectathon failure
[not found] <200409152054.i8FKsTNV002355@roma.math.duke.edu>
@ 2004-09-15 22:23 ` Frank van Maarseveen
2004-09-15 23:02 ` viro
0 siblings, 1 reply; 2+ messages in thread
From: Frank van Maarseveen @ 2004-09-15 22:23 UTC (permalink / raw)
To: Andrew Schretter; +Cc: NFS, linux-kernel
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On Wed, Sep 15, 2004 at 04:54:29PM -0400, Andrew Schretter wrote:
>
> On local disk runs, TEMP/BAR still exists (I don't know why though). On NFS
> runs, it does not exists. This breaks connectathon's test.
Client: 2.6.8.1, server: 2.4.27 (serving ext3)
/proc/mounts: rw,nosuid,nodev,v3,rsize=8192,wsize=8192,hard,udp,lock
Behavior I see is identical to that on a local (ext3) fs on 2.6.8.1 and
also on local ext3 on 2.4.27, namely that TEMP/BAR still exists. This
looks like a long standing kernel bug since the rename(2) seems to
succeed:
(snippet from strace):
write(3, "...", 3) = 3
close(3) = 0
link("FOO", "TEMP/BAR") = 0
rename("TEMP/BAR", "FOO") = 0
unlink("FOO") = 0
output:
ls: FOO: No such file or directory
-rw-r--r-- 1 fvm sec 3 Sep 16 00:21 TEMP/BAR
(CC'ed to lkml)
--
Frank
[-- Attachment #2: lnk.c --]
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#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#ifndef MAXPATHLEN
#define MAXPATHLEN 128
#endif
/* maximum number of chars for the message string */
#define STRCHARS 100
main(int ac, char *av[]) {
int count, fd, slen, lerr, slerr;
char *fn;
struct stat sb;
char str[255];
if (mkdir("TEMP", 0755)) {
perror("mkdir TEMP");
exit(0);
}
fd = open("FOO", O_RDWR|O_CREAT, 0666);
if (fd < 0) {
perror("creat");
exit(0);
}
sprintf(str, "...");
slen = strlen(str);
if (write(fd, str, slen) != slen) {
perror("write");
(void) close(fd);
exit(0);
}
if (close(fd)) {
perror("close");
exit(0);
}
if (lerr = link("FOO", "TEMP/BAR")) {
if (errno != EOPNOTSUPP) {
perror("link");
exit(0);
}
} else if (rename("TEMP/BAR", "FOO")) {
perror("rerename");
exit(0);
}
if (unlink("FOO")) {
perror("unlink 1");
exit(0);
}
system("ls -l FOO TEMP/BAR");
exit(errno);
}
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