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From 8783be68d7f1710ad79903bb7eb20ef12045c1e3 Mon Sep 17 00:00:00 2001
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Message-Id: <8783be68d7f1710ad79903bb7eb20ef12045c1e3.1418766606.git.jen@redhat.com>
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In-Reply-To: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com>
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References: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com>
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From: Fam Zheng <famz@redhat.com>
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Date: Thu, 4 Dec 2014 00:05:14 -0600
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Subject: [CHANGE 20/31] vmdk: Implement .bdrv_get_info()
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To: rhvirt-patches@redhat.com,
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jen@redhat.com
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RH-Author: Fam Zheng <famz@redhat.com>
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Message-id: <1417651524-18041-21-git-send-email-famz@redhat.com>
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Patchwork-id: 62693
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O-Subject: [RHEL-7.1 qemu-kvm PATCH v5 20/30] vmdk: Implement .bdrv_get_info()
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Bugzilla: 1134283
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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This will return cluster_size and needs_compressed_writes to caller, if all the
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extents have the same value (or there's only one extent). Otherwise return
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-ENOTSUP.
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cluster_size is only reported for sparse formats.
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit 74fe188cd1a27a5565787152d8620f8b8d04c4f9)
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Signed-off-by: Jeff E. Nelson <jen@redhat.com>
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---
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block/vmdk.c | 21 +++++++++++++++++++++
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tests/qemu-iotests/059.out | 1 +
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2 files changed, 22 insertions(+)
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diff --git a/block/vmdk.c b/block/vmdk.c
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index 157db7e..94e8782 100644
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--- a/block/vmdk.c
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+++ b/block/vmdk.c
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@@ -2071,6 +2071,26 @@ static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs)
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return spec_info;
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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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+ /* 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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+ return -ENOTSUP;
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+ }
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+ }
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+ return 0;
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+}
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+
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static QEMUOptionParameter vmdk_create_options[] = {
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{
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.name = BLOCK_OPT_SIZE,
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@@ -2127,6 +2147,7 @@ static BlockDriver bdrv_vmdk = {
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.bdrv_has_zero_init = vmdk_has_zero_init,
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.bdrv_get_specific_info = vmdk_get_specific_info,
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.bdrv_refresh_limits = vmdk_refresh_limits,
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+ .bdrv_get_info = vmdk_get_info,
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.create_options = vmdk_create_options,
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};
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diff --git a/tests/qemu-iotests/059.out b/tests/qemu-iotests/059.out
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index 7c9ef90..f226f71 100644
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--- a/tests/qemu-iotests/059.out
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+++ b/tests/qemu-iotests/059.out
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@@ -2050,6 +2050,7 @@ qemu-img: Could not open 'TEST_DIR/t.IMGFMT': File truncated, expecting at least
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image: TEST_DIR/iotest-version3.IMGFMT
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file format: IMGFMT
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virtual size: 1.0G (1073741824 bytes)
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+cluster_size: 65536
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=== Testing 4TB monolithicFlat creation and IO ===
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Formatting 'TEST_DIR/iotest-version3.IMGFMT', fmt=IMGFMT size=4398046511104
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--
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2.1.0
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