Bug 6567 - cp -p - timestamp problems persist in unusual ways (Novell & Gnome)
cp -p - timestamp problems persist in unusual ways (Novell & Gnome)
Status: NEEDINFO
Product: CifsVFS
Classification: Unclassified
Component: kernel fs
2.6
x86 Linux
: P3 critical
: ---
Assigned To: Steve French
:
Depends on:
Blocks:
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Reported: 2009-07-19 22:31 UTC by Dev Sdc
Modified: 2016-02-26 02:07 UTC (History)
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Description Dev Sdc 2009-07-19 22:31:31 UTC
I'm using cifs 1.56 backport on Debian Lenny. Finally I can copy files and the dates and times are preserved, but only under certain conditions:

Novell Netware volume (CIFS) mounted on my Debian box:

1. cp -pr /etc/someoldir /nwmount/. DOES preserve the file timestamps, but NOT directory timestamps

2. The Gnome file manager DOES NOT preserve file or directory timestamps at all

WinXP drive mounted on my Debian box:

1. cp -pr /etc/someoldir /wxpmount/. ALL WORKS as expected

2. The Gnome file manager DOES NOT preserve file or directory timestamps

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Note: CentOS 5.3 using cifs v 1.54 behaves the same as above with the exception that Gnome file manager DOES preserve directory and file timestamps when copying to a WinXP share.
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Using smbfs on a SLES-10 box works as expected for all of the above operations.

Thus far cifs is dysfunctional for my purposes and I just don't use it. It's frustrating having to check timestamps after using any utility that copies/modifies files and directories on a cifs share. If smbfs is on my distro, then I'll use that, if only cifs is available, then I use NFS.
Comment 1 Steve French 2016-02-26 02:06:27 UTC
I tried reproducing this on Ubuntu 14.04LTS using current kernel cifs.ko and don't see any problems with using gnome file manager to copy a directory tree to Windows and didn't see any issues with file or directory time stamps (also don't see any issues with cp -pr)

It is possible that Novell has a cifs server bug that doesn't honor setting directory timestamps using the normal protocol semantics, but if so we would need a wireshark (or tcpdump or netmon or equivalent) trace file to see if the server ignored the setfileinfo or setpathinfo CIFS protocol request.  See e.g. https://wiki.samba.org/index.php/LinuxCIFS_troubleshooting
and
https://wiki.samba.org/index.php/Capture_Packets
Comment 2 Steve French 2016-02-26 02:07:26 UTC
Please provide network traces if you still see this problem on reasonably current Linux kernels (from the last few years)