From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51827) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f0Ybs-0003x7-Fs for qemu-devel@nongnu.org; Mon, 26 Mar 2018 16:20:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f0Ybr-0000HS-Iq for qemu-devel@nongnu.org; Mon, 26 Mar 2018 16:20:52 -0400 From: Max Reitz Date: Mon, 26 Mar 2018 22:20:36 +0200 Message-Id: <20180326202039.21070-2-mreitz@redhat.com> In-Reply-To: <20180326202039.21070-1-mreitz@redhat.com> References: <20180326202039.21070-1-mreitz@redhat.com> Subject: [Qemu-devel] [PULL 1/4] qcow2-bitmap: add qcow2_reopen_bitmaps_rw_hint() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, Max Reitz , Peter Maydell From: Vladimir Sementsov-Ogievskiy Add version of qcow2_reopen_bitmaps_rw, which do the same work but also return a hint about was header updated or not. This will be used in the following fix for bitmaps reloading after migration. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: John Snow Reviewed-by: Max Reitz Message-id: 20180320170521.32152-2-vsementsov@virtuozzo.com Signed-off-by: Max Reitz --- block/qcow2.h | 2 ++ block/qcow2-bitmap.c | 15 ++++++++++++++- 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/block/qcow2.h b/block/qcow2.h index ccb92a9696..d301f77cea 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -671,6 +671,8 @@ int qcow2_check_bitmaps_refcounts(BlockDriverState *bs, BdrvCheckResult *res, void **refcount_table, int64_t *refcount_table_size); bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, Error **errp); +int qcow2_reopen_bitmaps_rw_hint(BlockDriverState *bs, bool *header_updated, + Error **errp); int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp); void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, Error **errp); int qcow2_reopen_bitmaps_ro(BlockDriverState *bs, Error **errp); diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c index 3010adb909..6e93ec43e1 100644 --- a/block/qcow2-bitmap.c +++ b/block/qcow2-bitmap.c @@ -1004,7 +1004,8 @@ fail: return false; } -int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp) +int qcow2_reopen_bitmaps_rw_hint(BlockDriverState *bs, bool *header_updated, + Error **errp) { BDRVQcow2State *s = bs->opaque; Qcow2BitmapList *bm_list; @@ -1012,6 +1013,10 @@ int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp) GSList *ro_dirty_bitmaps = NULL; int ret = 0; + if (header_updated != NULL) { + *header_updated = false; + } + if (s->nb_bitmaps == 0) { /* No bitmaps - nothing to do */ return 0; @@ -1055,6 +1060,9 @@ int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp) error_setg_errno(errp, -ret, "Can't update bitmap directory"); goto out; } + if (header_updated != NULL) { + *header_updated = true; + } g_slist_foreach(ro_dirty_bitmaps, set_readonly_helper, false); } @@ -1065,6 +1073,11 @@ out: return ret; } +int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp) +{ + return qcow2_reopen_bitmaps_rw_hint(bs, NULL, errp); +} + /* store_bitmap_data() * Store bitmap to image, filling bitmap table accordingly. */ -- 2.14.3