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Bug#664550: xfs_quota: "report -p" doesn't show all projects

To: submit@xxxxxxxxxxxxxxx
Subject: Bug#664550: xfs_quota: "report -p" doesn't show all projects
From: Sergio Gelato <Sergio.Gelato@xxxxxxxxxxx>
Date: Sun, 18 Mar 2012 22:11:11 +0100
Delivered-to: submit@xxxxxxxxxxxxxxx
Reply-to: Sergio Gelato <Sergio.Gelato@xxxxxxxxxxx>, 664550@xxxxxxxxxxxxxxx
Resent-cc: XFS Development Team <xfs@xxxxxxxxxxx>
Resent-date: Sun, 18 Mar 2012 21:16:49 +0000
Resent-from: Sergio Gelato <Sergio.Gelato@xxxxxxxxxxx>
Resent-message-id: <handler.664550.B.133210510920574@xxxxxxxxxxxxxxx>
Resent-sender: Debian BTS <debbugs@xxxxxxxxxxxxxxxxx>
Resent-to: debian-bugs-dist@xxxxxxxxxxxxxxxx
User-agent: Mutt/1.5.20 (2009-06-14)
Package: xfsprogs
Version: 3.1.4

When invoked without an explicit -U argument, the report and dump subcommands
of xfs_quota only mention projects that have a corresponding entry in
/etc/projid . This important fact is not mentioned in the man page.
It could easily result in loss of quota limit information across dump/restore
on systems where /etc/projid is out of date, corrupt or missing.

(Aside: even the fact that the dump subcommand accepts -L and -U isn't 
documented in the man page. Why not?)

With an explicit -U, the code switches from getprent() (which iterates
over the contents of /etc/projid) to a simple loop over all project IDs
in the given range. This is better, except possibly for performance if
the project ID space is sparse.

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