Fat32 - 1Gb file copy is failing

[Kandukuru_Suresh at emc.com]

> Hi All,
> Setup :- NAS device is running with 2.6.13 kernel and samba 3.0.32.I
> have connected a 4GB USB  flash drive having FAT32.USB drive is
> available from the windows machine as connected shared drive.
> 
> From my windows machine when I am trying to copy the file (>1Gb)   to
> shared USB drive(FAT32).it is giving error as shared USB drive is not
> reachable.
> 
> File copy is working fine with small files.
> And I could copy the files more than 1Gb when the drive is with NTFS
> and other file systems
> 
> I went though the code.
> 
> In the following samba code piece:
> samba-3.0.32_old/source/modules/vfs_default.c:
>     714 static int vfswrap_ftruncate(vfs_handle_struct *handle,
> files_struct
> *fsp, int fd, SMB_OFF_T len)
>     715 {
> ...
>     734
>     735     result = sys_ftruncate(fd, len);
>     736     if (result == 0)
>     737         goto done;
>     738
> 
> If comment out line 735/736 (not to extend space for the file to copy
> on fat),
> no error will occur during copying. (But we cannot do so otherwise all
> truncate
> requests from client would be skipped)
> 
> Please advice  me what is the exact poblem,or it is known bug?. Any
> reply will be appreciated .
> 
> Thanks in advance 
> Suresh
> 
>