kernel headers do not define OVERLAYFS_SUPER_MAGIC

[James Hunt]

Include file /usr/include/linux/magic.h is missing the following:

#define OVERLAYFS_SUPER_MAGIC 0x794c764f

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1247769

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[dino99 (9d9)]

no logs needed here

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1247769

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

Hi James,

It would be helpful to know which other piece of software would like the define in magic.h. That define already exists in fs/overlayfs/super.c, so we need to figure out if its best to remove it from there when adding it to magic.h.

[James Hunt (jamesodhunt)]

Hi Joseph,

Due to the headaches introduced by bug 882147 (which effectively guarantees that tests will fail erroneously), we are changing the Upstart tests to detect a /tmp overlayfs filesystem and display a warning. One approach is to make use of OVERLAYFS_SUPER_MAGIC to check /tmp. See below for the discussion:

https://code.launchpad.net/~jamesodhunt/upstart/check-for-overlayfs/+merge/191393

[Joseph Salisbury (jsalisbury)]

I created a patch with the OVERLAYFS_SUPER_MAGIC define moved to include/uapi/linux/magic.h from fs/overlafs/super.c

I built a test kernel with this patch and posted it at:
http://kernel.ubuntu.com/~jsalisbury/lp1247769/

Can you test this kernel to confirm it resolves this bug for you?

[Joseph Salisbury (jsalisbury)]

This bug was nominated against a series that is no longer supported, ie saucy. The bug task representing the saucy nomination is being closed as Won't Fix.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

This bug was nominated against a series that is no longer supported, ie raring. The bug task representing the raring nomination is being closed as Won't Fix.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

This bug was nominated against a series that is no longer supported, ie quantal. The bug task representing the quantal nomination is being closed as Won't Fix.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[dino99 (9d9)]

As per that patch, it seems done http://www.spinics.net/lists/kernel/msg1405218.html

[dino99 (9d9)]

and a more recent http://lkml.iu.edu/hypermail/linux/kernel/1411.2/02637.html

[dino99 (9d9)]

Closing that report as it seems outdated and fixed.