Bug#694624: /usr/sbin/xfs_freeze: freezes under lying (root) filesystem if mountpoint is not currently mounted

Bug#694624: /usr/sbin/xfs_freeze: freezes under lying (root) filesystem if mountpoint is not currently mounted

[Patrick Emblen]

Package: xfsprogs
Version: 3.1.7+b1
Severity: important
File: /usr/sbin/xfs_freeze

Dear Maintainer,
When xfs_freeze -f /some/path is executed and /some/path does not contain a
mounted file system the under lying (in my case root) file system was frozen, 
this then required travelling to the site to power cycle the machine. The
mount point normally hosted a removable drive, but it had been ejected.
 
Please have xfs_freeze return an error if the mountpoint argument does not
contain a mounted file system.
The documentation implies that the argument must be a mount point, but _any_
path provided as an argument will freeze the parent file system.



-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-3-686-pae (SMP w/2 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages xfsprogs depends on:
ii  libblkid1     2.20.1-5.1
ii  libc6         2.13-33
ii  libreadline5  5.2-11
ii  libuuid1      2.20.1-5.1

xfsprogs recommends no packages.

Versions of packages xfsprogs suggests:
ii  acl      2.2.51-8
pn  attr     <none>
pn  quota    <none>
pn  xfsdump  <none>

-- no debconf information

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Bug#694624: /usr/sbin/xfs_freeze: freezes under lying (root) filesystem if mountpoint is not currently mounted

[Christoph Hellwig]

It probably makes sense to only allow it for mountpoints, then again
I fear people might already be using it differently in existing scripts.

Maybe be should add an -s / --strict option that forces it to only work
on mountpoints?

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