From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51875) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ebQlO-0002n0-VG for qemu-devel@nongnu.org; Tue, 16 Jan 2018 07:54:53 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ebQlN-00078E-9X for qemu-devel@nongnu.org; Tue, 16 Jan 2018 07:54:51 -0500 Received: from mailhub.sw.ru ([195.214.232.25]:13489 helo=relay.sw.ru) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ebQlM-000773-T9 for qemu-devel@nongnu.org; Tue, 16 Jan 2018 07:54:49 -0500 From: Vladimir Sementsov-Ogievskiy Date: Tue, 16 Jan 2018 15:54:25 +0300 Message-Id: <20180116125427.18540-5-vsementsov@virtuozzo.com> In-Reply-To: <20180116125427.18540-1-vsementsov@virtuozzo.com> References: <20180116125427.18540-1-vsementsov@virtuozzo.com> Subject: [Qemu-devel] [PATCH v2 4/6] qmp: transaction support for block-dirty-bitmap-enable/disable List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, qemu-block@nongnu.org Cc: eblake@redhat.com, armbru@redhat.com, mreitz@redhat.com, kwolf@redhat.com, jsnow@redhat.com, famz@redhat.com, vsementsov@virtuozzo.com, den@openvz.org, nshirokovskiy@virtuozzo.com, mnestratov@virtuozzo.com Signed-off-by: Vladimir Sementsov-Ogievskiy --- qapi/transaction.json | 4 +++ blockdev.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 83 insertions(+) diff --git a/qapi/transaction.json b/qapi/transaction.json index bd312792da..b643d848f8 100644 --- a/qapi/transaction.json +++ b/qapi/transaction.json @@ -46,6 +46,8 @@ # - @abort: since 1.6 # - @block-dirty-bitmap-add: since 2.5 # - @block-dirty-bitmap-clear: since 2.5 +# - @block-dirty-bitmap-enable: since 2.12 +# - @block-dirty-bitmap-disable: since 2.12 # - @blockdev-backup: since 2.3 # - @blockdev-snapshot: since 2.5 # - @blockdev-snapshot-internal-sync: since 1.7 @@ -59,6 +61,8 @@ 'abort': 'Abort', 'block-dirty-bitmap-add': 'BlockDirtyBitmapAdd', 'block-dirty-bitmap-clear': 'BlockDirtyBitmap', + 'block-dirty-bitmap-enable': 'BlockDirtyBitmap', + 'block-dirty-bitmap-disable': 'BlockDirtyBitmap', 'blockdev-backup': 'BlockdevBackup', 'blockdev-snapshot': 'BlockdevSnapshot', 'blockdev-snapshot-internal-sync': 'BlockdevSnapshotInternal', diff --git a/blockdev.c b/blockdev.c index 997a6f514c..d338363d78 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1962,6 +1962,7 @@ typedef struct BlockDirtyBitmapState { AioContext *aio_context; HBitmap *backup; bool prepared; + bool was_enabled; } BlockDirtyBitmapState; static void block_dirty_bitmap_add_prepare(BlkActionState *common, @@ -2069,6 +2070,74 @@ static void block_dirty_bitmap_clear_clean(BlkActionState *common) } } +static void block_dirty_bitmap_enable_prepare(BlkActionState *common, + Error **errp) +{ + BlockDirtyBitmap *action; + BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, + common, common); + + if (action_check_completion_mode(common, errp) < 0) { + return; + } + + action = common->action->u.block_dirty_bitmap_enable.data; + state->bitmap = block_dirty_bitmap_lookup(action->node, + action->name, + &state->bs, + errp); + if (!state->bitmap) { + return; + } + + state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); + bdrv_enable_dirty_bitmap(state->bitmap); +} + +static void block_dirty_bitmap_enable_abort(BlkActionState *common) +{ + BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, + common, common); + + if (!state->was_enabled) { + bdrv_disable_dirty_bitmap(state->bitmap); + } +} + +static void block_dirty_bitmap_disable_prepare(BlkActionState *common, + Error **errp) +{ + BlockDirtyBitmap *action; + BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, + common, common); + + if (action_check_completion_mode(common, errp) < 0) { + return; + } + + action = common->action->u.block_dirty_bitmap_disable.data; + state->bitmap = block_dirty_bitmap_lookup(action->node, + action->name, + &state->bs, + errp); + if (!state->bitmap) { + return; + } + + state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); + bdrv_disable_dirty_bitmap(state->bitmap); +} + +static void block_dirty_bitmap_disable_abort(BlkActionState *common) +{ + BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, + common, common); + + if (state->was_enabled) { + bdrv_enable_dirty_bitmap(state->bitmap); + } +} + static void abort_prepare(BlkActionState *common, Error **errp) { error_setg(errp, "Transaction aborted using Abort action"); @@ -2130,6 +2199,16 @@ static const BlkActionOps actions[] = { .commit = block_dirty_bitmap_clear_commit, .abort = block_dirty_bitmap_clear_abort, .clean = block_dirty_bitmap_clear_clean, + }, + [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE] = { + .instance_size = sizeof(BlockDirtyBitmapState), + .prepare = block_dirty_bitmap_enable_prepare, + .abort = block_dirty_bitmap_enable_abort, + }, + [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE] = { + .instance_size = sizeof(BlockDirtyBitmapState), + .prepare = block_dirty_bitmap_disable_prepare, + .abort = block_dirty_bitmap_disable_abort, } }; -- 2.11.1