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From 09b91873d124019c0ddfc5c714191443a010f581 Mon Sep 17 00:00:00 2001
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Message-Id: <09b91873d124019c0ddfc5c714191443a010f581.1418766606.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 00:05:05 -0600
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Subject: [CHANGE 11/31] vmdk: extract vmdk_read_desc
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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: <1417651524-18041-12-git-send-email-famz@redhat.com>
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Patchwork-id: 62684
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O-Subject: [RHEL-7.1 qemu-kvm PATCH v5 11/30] vmdk: extract vmdk_read_desc
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Bugzilla: 1134251
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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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From: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Reviewed-by: Fam Zheng <famz@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit a8842e6d2acc815e9660cc743bd0b0daba18c935)
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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 | 41 ++++++++++++++++++++++++++++++-----------
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1 file changed, 30 insertions(+), 11 deletions(-)
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diff --git a/block/vmdk.c b/block/vmdk.c
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index eda2962..425064c 100644
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--- a/block/vmdk.c
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+++ b/block/vmdk.c
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@@ -529,6 +529,32 @@ static int vmdk_open_vmfs_sparse(BlockDriverState *bs,
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static int vmdk_open_desc_file(BlockDriverState *bs, int flags,
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uint64_t desc_offset, Error **errp);
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+static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset,
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+ Error **errp)
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+{
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+ int64_t size;
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+ char *buf;
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+ int ret;
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+
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+ size = bdrv_getlength(file);
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+ if (size < 0) {
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+ error_setg_errno(errp, -size, "Could not access file");
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+ return NULL;
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+ }
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+
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+ size = MIN(size, 1 << 20); /* avoid unbounded allocation */
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+ buf = g_malloc0(size + 1);
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+
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+ ret = bdrv_pread(file, desc_offset, buf, size);
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+ if (ret < 0) {
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+ error_setg_errno(errp, -ret, "Could not read from file");
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+ g_free(buf);
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+ return NULL;
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+ }
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+
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+ return buf;
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+}
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+
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static int vmdk_open_vmdk4(BlockDriverState *bs,
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BlockDriverState *file,
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int flags, Error **errp)
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@@ -823,23 +849,16 @@ static int vmdk_open_desc_file(BlockDriverState *bs, int flags,
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uint64_t desc_offset, Error **errp)
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{
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int ret;
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- char *buf = NULL;
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+ char *buf;
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char ct[128];
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BDRVVmdkState *s = bs->opaque;
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- int64_t size;
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- size = bdrv_getlength(bs->file);
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- if (size < 0) {
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+ buf = vmdk_read_desc(bs->file, desc_offset, errp);
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+ if (!buf) {
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return -EINVAL;
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- }
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-
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- size = MIN(size, 1 << 20); /* avoid unbounded allocation */
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- buf = g_malloc0(size + 1);
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-
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- ret = bdrv_pread(bs->file, desc_offset, buf, size);
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- if (ret < 0) {
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goto exit;
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}
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+
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if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) {
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error_setg(errp, "invalid VMDK image descriptor");
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ret = -EINVAL;
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--
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2.1.0
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