From 3cae2bf94bf3ef300facbd31214dbeae7b2ad7b7 Mon Sep 17 00:00:00 2001
From: Max Reitz <mreitz@redhat.com>
Date: Mon, 4 Nov 2013 22:31:57 +0100
Subject: [PATCH 04/87] block: Bugfix 'format' and 'snapshot' used in drive option

RH-Author: Max Reitz <mreitz@redhat.com>
Message-id: <1383604354-12743-7-git-send-email-mreitz@redhat.com>
Patchwork-id: 55306
O-Subject: [RHEL-7.0 qemu-kvm PATCH 06/43] block: Bugfix 'format' and 'snapshot' used in drive option
Bugzilla: 1026524
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
RH-Acked-by: Fam Zheng <famz@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>

From: Mike Qiu <qiudayu@linux.vnet.ibm.com>

BZ: 1026524

When use -drive file='xxx',format=qcow2,snapshot=on the error
message "Can't use snapshot=on with driver-specific options"
can be show, and fail to start the qemu.

This should not be happened, and there is no file.driver option
in qemu command line.

It is because the commit 74fe54f2a1b5c4f4498a8fe521e1dfc936656cd4,
it puts 'driver' option if the command line use 'format' option.

This patch is to solve this bug.

Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 6db5f5d68e2ffc430ba0511e23fc36c7363510f1)

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 blockdev.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 blockdev.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/blockdev.c b/blockdev.c
index 6710f61..a6563fa 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -342,6 +342,7 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
     QDict *bs_opts;
     const char *id;
     bool has_driver_specific_opts;
+    BlockDriver *drv = NULL;
 
     translation = BIOS_ATA_TRANSLATION_AUTO;
     media = MEDIA_DISK;
@@ -487,7 +488,11 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
             return NULL;
         }
 
-        qdict_put(bs_opts, "driver", qstring_from_str(buf));
+        drv = bdrv_find_whitelisted_format(buf, ro);
+        if (!drv) {
+            error_report("'%s' invalid format", buf);
+            return NULL;
+        }
     }
 
     /* disk I/O throttling */
@@ -702,12 +707,13 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
     }
 
     QINCREF(bs_opts);
-    ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, NULL);
+    ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv);
 
     if (ret < 0) {
         if (ret == -EMEDIUMTYPE) {
             error_report("could not open disk image %s: not in %s format",
-                         file ?: dinfo->id, qdict_get_str(bs_opts, "driver"));
+                         file ?: dinfo->id, drv ? drv->format_name :
+                         qdict_get_str(bs_opts, "driver"));
         } else {
             error_report("could not open disk image %s: %s",
                          file ?: dinfo->id, strerror(-ret));
-- 
1.7.1