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From 824614c344ceeb60dd27b38cfdb190471b6a2ef9 Mon Sep 17 00:00:00 2001
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From: Fam Zheng <famz@redhat.com>
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Date: Mon, 15 Feb 2016 09:28:14 +0100
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Subject: [PATCH 01/18] vmdk: Leave bdi intact if -ENOTSUP in vmdk_get_info
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RH-Author: Fam Zheng <famz@redhat.com>
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Message-id: <1455528511-9357-2-git-send-email-famz@redhat.com>
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Patchwork-id: 69167
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O-Subject: [RHEL-7.3 qemu-kvm PATCH 01/18] vmdk: Leave bdi intact if -ENOTSUP in vmdk_get_info
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Bugzilla: 1299250
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1299250
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When extent types don't match, we return -ENOTSUP. In this case, be
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polite to the caller and don't modify bdi.
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Reviewed-by: Max Reitz <mreitz@redhat.com>
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Message-id: 1415938161-16217-1-git-send-email-famz@redhat.com
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit 5f58330790b72c4705b373ee0646fb3adf800b4e)
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block/vmdk.c | 20 +++++++++++++-------
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1 file changed, 13 insertions(+), 7 deletions(-)
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diff --git a/block/vmdk.c b/block/vmdk.c
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index 6b015ab..fa53d2f 100644
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--- a/block/vmdk.c
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+++ b/block/vmdk.c
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@@ -2137,23 +2137,29 @@ static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs)
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return spec_info;
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}
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+static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b)
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+{
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+ return a->flat == b->flat &&
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+ a->compressed == b->compressed &&
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+ (a->flat || a->cluster_sectors == b->cluster_sectors);
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+}
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+
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static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
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{
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int i;
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BDRVVmdkState *s = bs->opaque;
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assert(s->num_extents);
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- bdi->needs_compressed_writes = s->extents[0].compressed;
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- if (!s->extents[0].flat) {
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- bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS;
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- }
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+
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/* See if we have multiple extents but they have different cases */
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for (i = 1; i < s->num_extents; i++) {
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- if (bdi->needs_compressed_writes != s->extents[i].compressed ||
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- (bdi->cluster_size && bdi->cluster_size !=
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- s->extents[i].cluster_sectors << BDRV_SECTOR_BITS)) {
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+ if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) {
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return -ENOTSUP;
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}
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}
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+ bdi->needs_compressed_writes = s->extents[0].compressed;
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+ if (!s->extents[0].flat) {
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+ bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS;
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+ }
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return 0;
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}
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--
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1.8.3.1
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