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From c5dddad12032351514c74083854393390ebd64e2 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 18:18:19 +0000
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Subject: [PATCH 25/35] block/dirty-bitmaps: prohibit enable/disable on
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locked/frozen bitmaps
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RH-Author: John Snow <jsnow@redhat.com>
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Message-id: <20181120181828.15132-16-jsnow@redhat.com>
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Patchwork-id: 83059
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O-Subject: [RHEL8/rhel qemu-kvm PATCH 15/24] block/dirty-bitmaps: prohibit enable/disable on locked/frozen bitmaps
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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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We're not being consistent about this. If it's in use by an operation,
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the user should not be able to change the behavior of that bitmap.
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Signed-off-by: John Snow <jsnow@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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Message-id: 20181002230218.13949-5-jsnow@redhat.com
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Signed-off-by: John Snow <jsnow@redhat.com>
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(cherry picked from commit b053bb55738f35832f3d6472b12277a75c32a038)
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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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blockdev.c | 26 ++++++++++++++++++++------
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1 file changed, 20 insertions(+), 6 deletions(-)
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diff --git a/blockdev.c b/blockdev.c
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index 220b317..916153e 100644
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--- a/blockdev.c
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+++ b/blockdev.c
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@@ -2168,6 +2168,13 @@ static void block_dirty_bitmap_enable_prepare(BlkActionState *common,
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return;
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}
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+ if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
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+ error_setg(errp,
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+ "Bitmap '%s' is currently in use by another operation"
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+ " and cannot be enabled", action->name);
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+ return;
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+ }
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+
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state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap);
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bdrv_enable_dirty_bitmap(state->bitmap);
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}
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@@ -2202,6 +2209,13 @@ static void block_dirty_bitmap_disable_prepare(BlkActionState *common,
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return;
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}
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+ if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
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+ error_setg(errp,
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+ "Bitmap '%s' is currently in use by another operation"
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+ " and cannot be disabled", action->name);
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+ return;
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+ }
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+
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state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap);
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bdrv_disable_dirty_bitmap(state->bitmap);
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}
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@@ -3043,10 +3057,10 @@ void qmp_x_block_dirty_bitmap_enable(const char *node, const char *name,
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return;
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}
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- if (bdrv_dirty_bitmap_frozen(bitmap)) {
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+ if (bdrv_dirty_bitmap_user_locked(bitmap)) {
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error_setg(errp,
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- "Bitmap '%s' is currently frozen and cannot be enabled",
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- name);
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+ "Bitmap '%s' is currently in use by another operation"
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+ " and cannot be enabled", name);
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return;
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}
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@@ -3064,10 +3078,10 @@ void qmp_x_block_dirty_bitmap_disable(const char *node, const char *name,
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return;
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}
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- if (bdrv_dirty_bitmap_frozen(bitmap)) {
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+ if (bdrv_dirty_bitmap_user_locked(bitmap)) {
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error_setg(errp,
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- "Bitmap '%s' is currently frozen and cannot be disabled",
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- name);
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+ "Bitmap '%s' is currently in use by another operation"
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+ " and cannot be disabled", name);
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return;
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}
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--
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1.8.3.1
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