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From 08a3a60a9a3cdd4d67e858981e4446d8f1d31fe4 Mon Sep 17 00:00:00 2001
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From: Max Reitz <mreitz@redhat.com>
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Date: Mon, 4 Nov 2013 22:32:31 +0100
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Subject: [PATCH 38/87] qcow2: Add overlap-check options
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RH-Author: Max Reitz <mreitz@redhat.com>
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Message-id: <1383604354-12743-41-git-send-email-mreitz@redhat.com>
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Patchwork-id: 55340
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O-Subject: [RHEL-7.0 qemu-kvm PATCH 40/43] qcow2: Add overlap-check options
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Bugzilla: 1004347
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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BZ: 1004347
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Add runtime options to tune the overlap checks to be performed before
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write accesses.
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit 05de7e86cab3ed3830de38b38b39bbc711bc1158)
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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---
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block/qcow2.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
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block/qcow2.h | 9 +++++++++
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2 files changed, 55 insertions(+)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block/qcow2.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
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block/qcow2.h | 9 +++++++++
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2 files changed, 55 insertions(+), 0 deletions(-)
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diff --git a/block/qcow2.c b/block/qcow2.c
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index 157361f..c47286f 100644
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--- a/block/qcow2.c
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+++ b/block/qcow2.c
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@@ -354,6 +354,52 @@ static QemuOptsList qcow2_runtime_opts = {
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.type = QEMU_OPT_BOOL,
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.help = "Generate discard requests when other clusters are freed",
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},
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+ {
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+ .name = QCOW2_OPT_OVERLAP,
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+ .type = QEMU_OPT_STRING,
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+ .help = "Selects which overlap checks to perform from a range of "
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+ "templates (none, constant, cached, all)",
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+ },
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+ {
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+ .name = QCOW2_OPT_OVERLAP_MAIN_HEADER,
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+ .type = QEMU_OPT_BOOL,
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+ .help = "Check for unintended writes into the main qcow2 header",
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+ },
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+ {
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+ .name = QCOW2_OPT_OVERLAP_ACTIVE_L1,
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+ .type = QEMU_OPT_BOOL,
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+ .help = "Check for unintended writes into the active L1 table",
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+ },
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+ {
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+ .name = QCOW2_OPT_OVERLAP_ACTIVE_L2,
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+ .type = QEMU_OPT_BOOL,
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+ .help = "Check for unintended writes into an active L2 table",
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+ },
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+ {
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+ .name = QCOW2_OPT_OVERLAP_REFCOUNT_TABLE,
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+ .type = QEMU_OPT_BOOL,
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+ .help = "Check for unintended writes into the refcount table",
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+ },
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+ {
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+ .name = QCOW2_OPT_OVERLAP_REFCOUNT_BLOCK,
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+ .type = QEMU_OPT_BOOL,
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+ .help = "Check for unintended writes into a refcount block",
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+ },
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+ {
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+ .name = QCOW2_OPT_OVERLAP_SNAPSHOT_TABLE,
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+ .type = QEMU_OPT_BOOL,
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+ .help = "Check for unintended writes into the snapshot table",
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+ },
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+ {
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+ .name = QCOW2_OPT_OVERLAP_INACTIVE_L1,
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+ .type = QEMU_OPT_BOOL,
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+ .help = "Check for unintended writes into an inactive L1 table",
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+ },
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+ {
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+ .name = QCOW2_OPT_OVERLAP_INACTIVE_L2,
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+ .type = QEMU_OPT_BOOL,
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+ .help = "Check for unintended writes into an inactive L2 table",
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+ },
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{ /* end of list */ }
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},
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};
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diff --git a/block/qcow2.h b/block/qcow2.h
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index d1fd91b..1bba3ed 100644
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--- a/block/qcow2.h
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+++ b/block/qcow2.h
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@@ -63,6 +63,15 @@
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#define QCOW2_OPT_DISCARD_REQUEST "pass-discard-request"
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#define QCOW2_OPT_DISCARD_SNAPSHOT "pass-discard-snapshot"
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#define QCOW2_OPT_DISCARD_OTHER "pass-discard-other"
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+#define QCOW2_OPT_OVERLAP "overlap-check"
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+#define QCOW2_OPT_OVERLAP_MAIN_HEADER "overlap-check.main-header"
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+#define QCOW2_OPT_OVERLAP_ACTIVE_L1 "overlap-check.active-l1"
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+#define QCOW2_OPT_OVERLAP_ACTIVE_L2 "overlap-check.active-l2"
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+#define QCOW2_OPT_OVERLAP_REFCOUNT_TABLE "overlap-check.refcount-table"
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+#define QCOW2_OPT_OVERLAP_REFCOUNT_BLOCK "overlap-check.refcount-block"
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+#define QCOW2_OPT_OVERLAP_SNAPSHOT_TABLE "overlap-check.snapshot-table"
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+#define QCOW2_OPT_OVERLAP_INACTIVE_L1 "overlap-check.inactive-l1"
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+#define QCOW2_OPT_OVERLAP_INACTIVE_L2 "overlap-check.inactive-l2"
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typedef struct QCowHeader {
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uint32_t magic;
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--
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1.7.1
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