features/qemu-block: support for QCOW2 and QED formats

This patch adds support for internals snapshots using QCOW2 and
general framework for external snapshots (next patch) with
QCOW2 and QED.

For internal snapshots, the file must be "initialized" or
"formatted" into QCOW2 format, and specify a file size.

Snapshots can be created, deleted, and applied ("goto").

e.g:

 // Format and Initialize

sh# setfattr -n trusted.glusterfs.block-format -v qcow2:10GB /mnt/imgfile
sh# ls -l /mnt/imgfile
-rw-r--r-- 1 root root 10G Jul 18 21:20 imgfile

 // Create a snapshot

sh# setfattr -n trusted.glusterfs.block-snapshot-create -v name1 imgfile

 // Apply a snapshot

sh# setfattr -n trusted.gluterfs.block-snapshot-goto -v name1 imgfile

Change-Id: If993e057a9455967ba3fa9dcabb7f74b8b2cf4c3
BUG: 986775
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/5367
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/tests/basic/file-snapshot.t b/tests/basic/file-snapshot.t
new file mode 100755
index 00000000000..93726f4b85d
--- /dev/null
+++ b/tests/basic/file-snapshot.t
@@ -0,0 +1,55 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+. $(dirname $0)/../volume.rc
+
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume info;
+
+TEST $CLI volume create $V0 $H0:$B0/$V0;
+
+EXPECT "$V0" volinfo_field $V0 'Volume Name';
+EXPECT 'Created' volinfo_field $V0 'Status';
+
+TEST $CLI volume start $V0;
+EXPECT 'Started' volinfo_field $V0 'Status';
+
+TEST $CLI volume set $V0 features.file-snapshot on;
+
+TEST $CLI volume set $V0 performance.quick-read off;
+TEST $CLI volume set $V0 performance.io-cache off;
+TEST glusterfs -s $H0 --volfile-id $V0 $M0 --attribute-timeout=0;
+
+TEST touch $M0/big-file;
+
+TEST setfattr -n trusted.glusterfs.block-format -v qcow2:10GB $M0/big-file;
+
+TEST [ `stat -c '%s' $M0/big-file` = 10737418240 ]
+
+echo 'ABCDEFGHIJ' > $M0/data-file1
+TEST dd if=$M0/data-file1 of=$M0/big-file conv=notrunc;
+TEST setfattr -n trusted.glusterfs.block-snapshot-create -v image1 $M0/big-file;
+
+echo '1234567890' > $M0/data-file2
+TEST dd if=$M0/data-file2 of=$M0/big-file conv=notrunc;
+TEST setfattr -n trusted.glusterfs.block-snapshot-create -v image2 $M0/big-file;
+
+TEST setfattr -n trusted.glusterfs.block-snapshot-goto -v image1 $M0/big-file;
+TEST dd if=$M0/big-file of=$M0/out-file1 bs=11 count=1;
+
+TEST setfattr -n trusted.glusterfs.block-snapshot-goto -v image2 $M0/big-file;
+TEST dd if=$M0/big-file of=$M0/out-file2 bs=11 count=1;
+
+TEST cmp $M0/data-file1 $M0/out-file1;
+TEST cmp $M0/data-file2 $M0/out-file2;
+
+TEST $CLI volume stop $V0;
+EXPECT 'Stopped' volinfo_field $V0 'Status';
+
+TEST $CLI volume delete $V0;
+TEST ! $CLI volume info $V0;
+
+cleanup;