Messages in this thread | | | Subject | smbfs: lseek returns EINVAL when using large files. | From | Mathieu Fluhr <> | Date | Mon, 11 Apr 2005 11:07:43 +0200 |
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Hello
It seems that the smbfs driver does not handle correctly large files (>2GB). The thing is that statting them is correct (for example, the st_size field is correctly set), but as soon as you try to make a lseek with an offset larget than INT_MAX, you get a EINVAL error.
Note: This is not coming out of the remote samba server (Tested with under windows, and it is working fine).
I'm using a 2.6.10 kernel without external patches. I parsed the 2.6.11 changelog to see if this problem has been fixed, but I didn't found anything related. If this has already been discussed, just let me know ;-)
You can reproduce this bug with this little program:
-8<------------------------------------------
/* Enable large file support for x86 */ #define _FILE_OFFSET_BITS 64
#include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> #include <limits.h> #include <stdio.h>
int main(int argc, char **argv) { int fd = open(argv[1], O_RDONLY); if(fd == -1) perror("open");
struct stat st; fstat(fd, &st);
printf("filesize: %llu\n", st.st_size);
/* Go at end... */ if(lseek(fd, 0, SEEK_END) == (off_t)(-1)) perror("lseek");
close(fd); return 0; }
-8<------------------------------------------
Best Regards, Mathieu Fluhr
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