From 58929b550bf0188e225cbce8296337d0e47dcc13 Mon Sep 17 00:00:00 2001
From: "Brian C. Lane" <bcl@redhat.com>
Date: Fri, 7 Mar 2014 17:33:18 -0800
Subject: [PATCH] Add support for creating qcow2 images (#1210413)

(cherry picked from commit 07d5cb176d5bb6c909036e5963d14afdb2918038)

Related: rhbz#1210413
---
 src/pylorax/imgutils.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/pylorax/imgutils.py b/src/pylorax/imgutils.py
index 9aec894f..e93ee0d5 100644
--- a/src/pylorax/imgutils.py
+++ b/src/pylorax/imgutils.py
@@ -113,6 +113,18 @@ def mksparse(outfile, size):
     fobj = open(outfile, "w")
     os.ftruncate(fobj.fileno(), size)
 
+def mkqcow2(outfile, size, options=None):
+    '''use qemu-img to create a file of the given size.
+       options is a list of options passed to qemu-img
+
+       Default format is qcow2, override by passing "-f", fmt
+       in options.
+    '''
+    options = options or []
+    if "-f" not in options:
+        options.extend(["-f", "qcow2"])
+    runcmd(["qemu-img", "create"] + options + [outfile, str(size)])
+
 def loop_attach(outfile):
     '''Attach a loop device to the given file. Return the loop device name.
     Raises CalledProcessError if losetup fails.'''