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[Qemu-devel] [PATCH 0/3 v3] allow online resizing of block devices

From: Christoph Hellwig
Subject: [Qemu-devel] [PATCH 0/3 v3] allow online resizing of block devices
Date: Mon, 24 Jan 2011 13:32:23 +0100
User-agent: Mutt/1.3.28i

This patchset adds support for online resizing of block devices.

The first patch adds a new resize monitor command which call into
the existing image resize code.  This is the meat of the series
and probably needs quite a bit of review and help as I'm not sure
about how to implement the error handling for monitor commands
correctly.  Am I really supposed to add a new QERR_ definition
for each possible error?  And if yes how am I supposed to define
them?  The macros for them aren't exactly self-explaining.

The second patch adds a way to tell drivers about a resize, and the
third one adds a guest notification for config changes to virtio-blk
which allows the guest to pick it up without a rescan.  I've just sent
the corresponding Linux guest driver patch to Rusty.

Changes from version 2 to version 3:
 - add missing braces
 - use device as the argument name for the device string
 - also rename the HMP version of the command to block_resize

Changes from version 1 to version 2:
 - also add a QMP command (block_resize)
 - use the o format for the size in the monitor command
 - fix typos
 - use QERR_UNDEFINED_ERROR for errors instead of unstructured strings
 - remove the CDROM hint check
 - add a reason argument to the change callback
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