From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD07EC606D1 for ; Mon, 8 Jul 2019 22:08:44 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A10A92166E for ; Mon, 8 Jul 2019 22:08:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A10A92166E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:45155 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hkboR-0005Rc-HG for qemu-devel@archiver.kernel.org; Mon, 08 Jul 2019 18:08:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44050) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hkblC-00020f-Rp for qemu-devel@nongnu.org; Mon, 08 Jul 2019 18:05:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hkblB-0003id-4n for qemu-devel@nongnu.org; Mon, 08 Jul 2019 18:05:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40786) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hkbl3-0003cq-OT; Mon, 08 Jul 2019 18:05:14 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 782223092649; Mon, 8 Jul 2019 22:05:12 +0000 (UTC) Received: from probe.bos.redhat.com (dhcp-17-215.bos.redhat.com [10.18.17.215]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4759C1001B01; Mon, 8 Jul 2019 22:05:11 +0000 (UTC) From: John Snow To: qemu-block@nongnu.org, qemu-devel@nongnu.org Date: Mon, 8 Jul 2019 18:05:01 -0400 Message-Id: <20190708220502.12977-3-jsnow@redhat.com> In-Reply-To: <20190708220502.12977-1-jsnow@redhat.com> References: <20190708220502.12977-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.43]); Mon, 08 Jul 2019 22:05:12 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 2/3] qapi: implement block-dirty-bitmap-remove transaction action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , Kevin Wolf , vsementsov@virtuozzo.com, Juan Quintela , John Snow , "Dr. David Alan Gilbert" , Max Reitz , Stefan Hajnoczi , Markus Armbruster Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" It is used to do transactional movement of the bitmap (which is possible in conjunction with merge command). Transactional bitmap movement is needed in scenarios with external snapshot, when we don't want to leave copy of the bitmap in the base image. Signed-off-by: Vladimir Sementsov-Ogievskiy Signed-off-by: John Snow --- block.c | 2 +- block/dirty-bitmap.c | 15 +++---- blockdev.c | 79 +++++++++++++++++++++++++++++++--- include/block/dirty-bitmap.h | 2 +- migration/block-dirty-bitmap.c | 2 +- qapi/transaction.json | 2 + 6 files changed, 85 insertions(+), 17 deletions(-) diff --git a/block.c b/block.c index c139540f2b..5195d4b910 100644 --- a/block.c +++ b/block.c @@ -5316,7 +5316,7 @@ static void coroutine_fn bdrv_co_invalidate_cache(B= lockDriverState *bs, for (bm =3D bdrv_dirty_bitmap_next(bs, NULL); bm; bm =3D bdrv_dirty_bitmap_next(bs, bm)) { - bdrv_dirty_bitmap_set_migration(bm, false); + bdrv_dirty_bitmap_skip_store(bm, false); } =20 ret =3D refresh_total_sectors(bs, bs->total_sectors); diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 95a9c2a5d8..a308e1f84b 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -48,10 +48,9 @@ struct BdrvDirtyBitmap { bool inconsistent; /* bitmap is persistent, but inconsisten= t. It cannot be used at all in any way, = except a QMP user can remove it. */ - bool migration; /* Bitmap is selected for migration, it = should - not be stored on the next inactivatio= n - (persistent flag doesn't matter until= next - invalidation).*/ + bool skip_store; /* We are either migrating or deleting t= his + * bitmap; it should not be stored on th= e next + * inactivation. */ QLIST_ENTRY(BdrvDirtyBitmap) list; }; =20 @@ -757,16 +756,16 @@ void bdrv_dirty_bitmap_set_inconsistent(BdrvDirtyBi= tmap *bitmap) } =20 /* Called with BQL taken. */ -void bdrv_dirty_bitmap_set_migration(BdrvDirtyBitmap *bitmap, bool migra= tion) +void bdrv_dirty_bitmap_skip_store(BdrvDirtyBitmap *bitmap, bool skip) { qemu_mutex_lock(bitmap->mutex); - bitmap->migration =3D migration; + bitmap->skip_store =3D skip; qemu_mutex_unlock(bitmap->mutex); } =20 bool bdrv_dirty_bitmap_get_persistence(BdrvDirtyBitmap *bitmap) { - return bitmap->persistent && !bitmap->migration; + return bitmap->persistent && !bitmap->skip_store; } =20 bool bdrv_dirty_bitmap_inconsistent(const BdrvDirtyBitmap *bitmap) @@ -778,7 +777,7 @@ bool bdrv_has_changed_persistent_bitmaps(BlockDriverS= tate *bs) { BdrvDirtyBitmap *bm; QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) { - if (bm->persistent && !bm->readonly && !bm->migration) { + if (bm->persistent && !bm->readonly && !bm->skip_store) { return true; } } diff --git a/blockdev.c b/blockdev.c index 01248252ca..800b3dcb42 100644 --- a/blockdev.c +++ b/blockdev.c @@ -2134,6 +2134,51 @@ static void block_dirty_bitmap_merge_prepare(BlkAc= tionState *common, errp); } =20 +static BdrvDirtyBitmap *do_block_dirty_bitmap_remove( + const char *node, const char *name, bool release, + BlockDriverState **bitmap_bs, Error **errp); + +static void block_dirty_bitmap_remove_prepare(BlkActionState *common, + Error **errp) +{ + BlockDirtyBitmap *action; + BlockDirtyBitmapState *state =3D DO_UPCAST(BlockDirtyBitmapState, + common, common); + + if (action_check_completion_mode(common, errp) < 0) { + return; + } + + action =3D common->action->u.block_dirty_bitmap_remove.data; + + state->bitmap =3D do_block_dirty_bitmap_remove(action->node, action-= >name, + false, &state->bs, errp= ); + if (state->bitmap) { + bdrv_dirty_bitmap_skip_store(state->bitmap, true); + bdrv_dirty_bitmap_set_busy(state->bitmap, true); + } +} + +static void block_dirty_bitmap_remove_abort(BlkActionState *common) +{ + BlockDirtyBitmapState *state =3D DO_UPCAST(BlockDirtyBitmapState, + common, common); + + if (state->bitmap) { + bdrv_dirty_bitmap_skip_store(state->bitmap, false); + bdrv_dirty_bitmap_set_busy(state->bitmap, false); + } +} + +static void block_dirty_bitmap_remove_commit(BlkActionState *common) +{ + BlockDirtyBitmapState *state =3D DO_UPCAST(BlockDirtyBitmapState, + common, common); + + bdrv_dirty_bitmap_set_busy(state->bitmap, false); + bdrv_release_dirty_bitmap(state->bs, state->bitmap); +} + static void abort_prepare(BlkActionState *common, Error **errp) { error_setg(errp, "Transaction aborted using Abort action"); @@ -2211,6 +2256,12 @@ static const BlkActionOps actions[] =3D { .commit =3D block_dirty_bitmap_free_backup, .abort =3D block_dirty_bitmap_restore, }, + [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE] =3D { + .instance_size =3D sizeof(BlockDirtyBitmapState), + .prepare =3D block_dirty_bitmap_remove_prepare, + .commit =3D block_dirty_bitmap_remove_commit, + .abort =3D block_dirty_bitmap_remove_abort, + }, /* Where are transactions for MIRROR, COMMIT and STREAM? * Although these blockjobs use transaction callbacks like the backu= p job, * these jobs do not necessarily adhere to transaction semantics. @@ -2869,20 +2920,21 @@ void qmp_block_dirty_bitmap_add(const char *node,= const char *name, bdrv_dirty_bitmap_set_persistence(bitmap, persistent); } =20 -void qmp_block_dirty_bitmap_remove(const char *node, const char *name, - Error **errp) +static BdrvDirtyBitmap *do_block_dirty_bitmap_remove( + const char *node, const char *name, bool release, + BlockDriverState **bitmap_bs, Error **errp) { BlockDriverState *bs; BdrvDirtyBitmap *bitmap; =20 bitmap =3D block_dirty_bitmap_lookup(node, name, &bs, errp); if (!bitmap || !bs) { - return; + return NULL; } =20 if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_BUSY | BDRV_BITMAP_R= O, errp)) { - return; + return NULL; } =20 if (bdrv_dirty_bitmap_get_persistence(bitmap)) { @@ -2892,13 +2944,28 @@ void qmp_block_dirty_bitmap_remove(const char *no= de, const char *name, aio_context_acquire(aio_context); bdrv_remove_persistent_dirty_bitmap(bs, name, &local_err); aio_context_release(aio_context); + if (local_err !=3D NULL) { error_propagate(errp, local_err); - return; + return NULL; } } =20 - bdrv_release_dirty_bitmap(bs, bitmap); + if (release) { + bdrv_release_dirty_bitmap(bs, bitmap); + } + + if (bitmap_bs) { + *bitmap_bs =3D bs; + } + + return release ? NULL : bitmap; +} + +void qmp_block_dirty_bitmap_remove(const char *node, const char *name, + Error **errp) +{ + do_block_dirty_bitmap_remove(node, name, true, NULL, errp); } =20 /** diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h index 62682eb865..a21d54a090 100644 --- a/include/block/dirty-bitmap.h +++ b/include/block/dirty-bitmap.h @@ -83,7 +83,7 @@ void bdrv_dirty_bitmap_set_inconsistent(BdrvDirtyBitmap= *bitmap); void bdrv_dirty_bitmap_set_busy(BdrvDirtyBitmap *bitmap, bool busy); void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitma= p *src, HBitmap **backup, Error **errp); -void bdrv_dirty_bitmap_set_migration(BdrvDirtyBitmap *bitmap, bool migra= tion); +void bdrv_dirty_bitmap_skip_store(BdrvDirtyBitmap *bitmap, bool skip); =20 /* Functions that require manual locking. */ void bdrv_dirty_bitmap_lock(BdrvDirtyBitmap *bitmap); diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitma= p.c index 4a896a09eb..d650ba4c23 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -326,7 +326,7 @@ static int init_dirty_bitmap_migration(void) =20 /* unset migration flags here, to not roll back it */ QSIMPLEQ_FOREACH(dbms, &dirty_bitmap_mig_state.dbms_list, entry) { - bdrv_dirty_bitmap_set_migration(dbms->bitmap, true); + bdrv_dirty_bitmap_skip_store(dbms->bitmap, true); } =20 if (QSIMPLEQ_EMPTY(&dirty_bitmap_mig_state.dbms_list)) { diff --git a/qapi/transaction.json b/qapi/transaction.json index 95edb78227..da95b804aa 100644 --- a/qapi/transaction.json +++ b/qapi/transaction.json @@ -45,6 +45,7 @@ # # - @abort: since 1.6 # - @block-dirty-bitmap-add: since 2.5 +# - @block-dirty-bitmap-remove: since 4.1 # - @block-dirty-bitmap-clear: since 2.5 # - @block-dirty-bitmap-enable: since 4.0 # - @block-dirty-bitmap-disable: since 4.0 @@ -61,6 +62,7 @@ 'data': { 'abort': 'Abort', 'block-dirty-bitmap-add': 'BlockDirtyBitmapAdd', + 'block-dirty-bitmap-remove': 'BlockDirtyBitmap', 'block-dirty-bitmap-clear': 'BlockDirtyBitmap', 'block-dirty-bitmap-enable': 'BlockDirtyBitmap', 'block-dirty-bitmap-disable': 'BlockDirtyBitmap', --=20 2.21.0