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From 9672f88c8747e874efb9d8d6f67b8d4d8c474779 Mon Sep 17 00:00:00 2001
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From: John Snow <jsnow@redhat.com>
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Date: Tue, 20 Nov 2018 18:18:25 +0000
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Subject: [PATCH 31/35] bloc/qcow2: drop dirty_bitmaps_loaded state variable
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RH-Author: John Snow <jsnow@redhat.com>
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Message-id: <20181120181828.15132-22-jsnow@redhat.com>
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Patchwork-id: 83067
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O-Subject: [RHEL8/rhel qemu-kvm PATCH 21/24] bloc/qcow2: drop dirty_bitmaps_loaded state variable
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Bugzilla: 1518989
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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This variable doesn't work as it should, because it is actually cleared
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in qcow2_co_invalidate_cache() by memset(). Drop it, as the following
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patch will introduce new behavior.
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Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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Reviewed-by: John Snow <jsnow@redhat.com>
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Signed-off-by: John Snow <jsnow@redhat.com>
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(cherry picked from commit 2ea427effff61efa5d0dc69f9cae126d13879617)
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Signed-off-by: John Snow <jsnow@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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block/qcow2.c | 19 ++-----------------
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block/qcow2.h | 1 -
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2 files changed, 2 insertions(+), 18 deletions(-)
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diff --git a/block/qcow2.c b/block/qcow2.c
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index 5c5530d..d260cd6 100644
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--- a/block/qcow2.c
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+++ b/block/qcow2.c
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@@ -1149,7 +1149,6 @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options,
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uint64_t ext_end;
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uint64_t l1_vm_state_index;
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bool update_header = false;
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- bool header_updated = false;
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ret = bdrv_pread(bs->file, 0, &header, sizeof(header));
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if (ret < 0) {
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@@ -1488,23 +1487,9 @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options,
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s->autoclear_features &= QCOW2_AUTOCLEAR_MASK;
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}
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- if (s->dirty_bitmaps_loaded) {
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- /* It's some kind of reopen. There are no known cases where we need to
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- * reload bitmaps in such a situation, so it's safer to skip them.
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- *
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- * Moreover, if we have some readonly bitmaps and we are reopening for
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- * rw we should reopen bitmaps correspondingly.
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- */
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- if (bdrv_has_readonly_bitmaps(bs) &&
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- !bdrv_is_read_only(bs) && !(bdrv_get_flags(bs) & BDRV_O_INACTIVE))
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- {
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- qcow2_reopen_bitmaps_rw_hint(bs, &header_updated, &local_err);
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- }
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- } else {
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- header_updated = qcow2_load_dirty_bitmaps(bs, &local_err);
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- s->dirty_bitmaps_loaded = true;
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+ if (qcow2_load_dirty_bitmaps(bs, &local_err)) {
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+ update_header = false;
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}
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- update_header = update_header && !header_updated;
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if (local_err != NULL) {
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error_propagate(errp, local_err);
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ret = -EINVAL;
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diff --git a/block/qcow2.h b/block/qcow2.h
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index d2c63e4..43163b2 100644
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--- a/block/qcow2.h
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+++ b/block/qcow2.h
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@@ -299,7 +299,6 @@ typedef struct BDRVQcow2State {
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uint32_t nb_bitmaps;
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uint64_t bitmap_directory_size;
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uint64_t bitmap_directory_offset;
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- bool dirty_bitmaps_loaded;
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int flags;
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int qcow_version;
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--
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1.8.3.1
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