Re: [PATCH] disk quotas fail when /etc/mtab is symlinked to /proc/mounts

From: Mark Bellon
Date: Thu Jul 28 2005 - 19:22:42 EST

If /etc/mtab is a regular file all of the mount options (of a file system) are written to /etc/mtab by the mount command. The quota tools look there for the quota strings for their operation. If, however, /etc/mtab is a symlink to /proc/mounts (a "good thing" in some environments) the tools don't write anything - they assume the kernel will take care of things.

While the quota options are sent down to the kernel via the mount system call and the file system codes handle them properly unfortunately there is no code to echo the quota strings into /proc/mounts and the quota tools fail in the symlink case.

The attached patchs modify the EXT[2|3] and JFS codes to add the necessary hooks. The show_options function of each file system in these patches currently deal with only those things that seemed related to quotas; especially in the EXT3 case more can be done (later?).

The original XFS change has been dropped as per Nathan Scott <nathans@xxxxxxx>. The functionality had already been added.

The EXT3 has added error checking and has two minor changes:
The "quota" option is considered part of the older style quotas
Journalled quotas and older style quotas are mutually exclusive.
- both discussable topics


Signed-off-by: Mark Bellon <mbellon@xxxxxxxxxx>
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