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From: Andrew Bartlett on 6 May 2008 19:40
On Tue, 2008-05-06 at 11:07 -0400, Matt Boyle wrote:
> Put this in the wrong thread, sorry!
>
>
> UPDATE: I've realized that this seems to be an issue with the compiler flags used to build samba.
> I've realized that i need to define _LARGEFILE_SOURCE, _LARGEFILE64_SOURCE, and _FILE_OFFSET_BITS=64.
>
> I've done this, but still have no luck reading files larger than 4GB. Anyone have suggestions?

smbfs the in-kernel filesystem, (particularly old versions such as in
Linux 2.4) never did files over 4GB well.

'Fixing' the userspace samba won't change the in-kernel limitations. I
suggest you find a different way to move the files, perhaps use
smbclient - the default compile should be perfectly fine for large files
(Samba itself has done large files for many years).

Andrew Bartlett

--
Andrew Bartlett
http://samba.org/~abartlet/
Authentication Developer, Samba Team http://samba.org
Samba Developer, Red Hat Inc.
From: Guenter Kukkukk on 6 May 2008 21:00
Am Dienstag, 6. Mai 2008 schrieb Matt Boyle:
> Put this in the wrong thread, sorry!
>
>
> UPDATE: I've realized that this seems to be an issue with the compiler flags used to build samba.
> I've realized that i need to define _LARGEFILE_SOURCE, _LARGEFILE64_SOURCE, and _FILE_OFFSET_BITS=64.
>
> I've done this, but still have no luck reading files larger than 4GB. Anyone have suggestions?
>
> Thanks,
> Matt
>
>
> > Hi guys,
> >
> > I'm attempting to move large files (>4GB) from a PowerPC-based embedded system running a 2.4 kernel architecture to an PC running a 2.6 kernel. I've got samba compiled, installed, and running on the embedded box. I also have the directories from the PPC system mounted and accessible from the PC.
> >
> > I have two problems: larger file sizes do not list correctly, and large files transferred from the embedded box to the PC are not complete; IE they're dropping data along the way. I'm familiar with the 2GB file size limit on samba, and have mounted the PC side using the lfs flag.
> >
> > Problem 1: Incorrect listing
> >
> > Here's a list of the directory from the embedded box:
> > -r--r--r-- 1 root root 52646396 Jan 5 06:46 file1.ch10
> > -r--r--r-- 1 root root 60755936 Jan 5 06:46 file2.ch10
> > -r--r--r-- 1 root root 47606684 Jan 5 06:46 file3.ch10
> > -r--r--r-- 1 root root 4920604376 Jan 5 05:51 file4.ch10
> >
> > Here's that same listing, but of the samba mount of that directory on the PC:
> >
> > -r-xr-xr-x 1 root root 52646396 Jan 5 2007 file1.ch10 -r-xr-xr-x 1
> > root root 60755936 Jan 5 2007 file2.ch10 -r-xr-xr-x 1 root root
> > 47606684 Jan 5 2007 file3.ch10 -r-xr-xr-x 1 root root 625637080 Jan 5
> > 2007 file4.ch10
> >
> > As you can see, files 1-3 list fine, but file4 is showing way short. I'm guessing this might be some sort of overflow condition, any ideas?
> >
> > Problem 2: Loss of data during transfer of large files.
> > When I try to transfer file4, i only get 41xxxxxxxx or so of the total
> > file size. This is the more pressing issue.
> >
> > Also, I cannot mount the samba share using CIFS. I use the line
> >
> > mount -t smbfs //server/share/ path/to/local/ -o user=u,pass=p,lfs
> >
> > to mount with SMBFS, and it works correctly, just doesn't display the large files.
> > However, when using the following:
> >
> > mount -t smbfs //server/share/ path/to/local/ -o user=u,pass=p,lfs

I guess, that's a typo above, so "smbfs" should read "cifs" ?

> >
> > I get "Mount error 5= Input/output error"
> >

You can do the following on your local "PC running a 2.6 kernel" to track
this down a bit more when using the cifs kernel module:

1. 'modinfo cifs' (to query some cifs version and kernel info)
2. 'modprobe cifs' (to make sure the module is loaded)
3. 'echo 3 > /proc/fs/cifs/cifsFYI' (to make cifs more chatty)
4. 'logger HERE-ALL-NEW-STUFF-NOW-========================================='
5. In a separate console, use 'tail -f /var/log/messages' to fetch cifs' msgs
6. use 'mount.cifs //server/share /path/to/local --verbose -o user=u,pass=p'
(the option "lfs" is _not_ needed here, not a valid cifs option)

(Usually) there should be cifs debug messages in the 4.) tail -f ... console.
All new entries start at the string
.... "HERE-ALL-NEW-STUFF-NOW-========================================="

Please send all output from the above steps 1.) 2.) 5.) and 6.)

Cheers, Günter

Note that some of the cmds above need root privs.
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From: Matt Boyle on 6 May 2008 11:10
Put this in the wrong thread, sorry!


UPDATE: I've realized that this seems to be an issue with the compiler flags used to build samba.
I've realized that i need to define _LARGEFILE_SOURCE, _LARGEFILE64_SOURCE, and _FILE_OFFSET_BITS=64.

I've done this, but still have no luck reading files larger than 4GB. Anyone have suggestions?

Thanks,
Matt


> Hi guys,
>
> I'm attempting to move large files (>4GB) from a PowerPC-based embedded system running a 2.4 kernel architecture to an PC running a 2.6 kernel. I've got samba compiled, installed, and running on the embedded box. I also have the directories from the PPC system mounted and accessible from the PC.
>
> I have two problems: larger file sizes do not list correctly, and large files transferred from the embedded box to the PC are not complete; IE they're dropping data along the way. I'm familiar with the 2GB file size limit on samba, and have mounted the PC side using the lfs flag.
>
> Problem 1: Incorrect listing
>
> Here's a list of the directory from the embedded box:
> -r--r--r-- 1 root root 52646396 Jan 5 06:46 file1.ch10
> -r--r--r-- 1 root root 60755936 Jan 5 06:46 file2.ch10
> -r--r--r-- 1 root root 47606684 Jan 5 06:46 file3.ch10
> -r--r--r-- 1 root root 4920604376 Jan 5 05:51 file4.ch10
>
> Here's that same listing, but of the samba mount of that directory on the PC:
>
> -r-xr-xr-x 1 root root 52646396 Jan 5 2007 file1.ch10 -r-xr-xr-x 1
> root root 60755936 Jan 5 2007 file2.ch10 -r-xr-xr-x 1 root root
> 47606684 Jan 5 2007 file3.ch10 -r-xr-xr-x 1 root root 625637080 Jan 5
> 2007 file4.ch10
>
> As you can see, files 1-3 list fine, but file4 is showing way short. I'm guessing this might be some sort of overflow condition, any ideas?
>
> Problem 2: Loss of data during transfer of large files.
> When I try to transfer file4, i only get 41xxxxxxxx or so of the total
> file size. This is the more pressing issue.
>
> Also, I cannot mount the samba share using CIFS. I use the line
>
> mount -t smbfs //server/share/ path/to/local/ -o user=u,pass=p,lfs
>
> to mount with SMBFS, and it works correctly, just doesn't display the large files.
> However, when using the following:
>
> mount -t smbfs //server/share/ path/to/local/ -o user=u,pass=p,lfs
>
> I get "Mount error 5= Input/output error"
>
> Any thoughts?
>
> Thanks,
> Matt

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