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bh=Pjj0uA512fbFHl0Wo1WPSqzpfgcIAEyienzfhOB+I1E=; b=fn9jPuBWECrbtPVKrt4K18qKbQc5tiQv0EUk9GOvihbsyW3AcguHlh5uegxAG2/tXTDcXx u3Gi4akKkBnMGMz3eOEbEQno3abKxXnntsxVMSuW5/ZiIymjCLoNeidDB4xxLikeO6oZny /nIAupJ4o/SyqS4G/WDXqG5nE+xn97A= X-MC-Unique: V3QOS1c5Oq2PBYexAqbbig-1 From: Max Reitz To: qemu-block@nongnu.org Subject: [PATCH v8 10/43] block: Use bdrv_filter_(bs|child) where obvious Date: Tue, 1 Sep 2020 16:33:51 +0200 Message-Id: <20200901143424.884735-11-mreitz@redhat.com> In-Reply-To: <20200901143424.884735-1-mreitz@redhat.com> References: <20200901143424.884735-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mreitz@redhat.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" Places that use patterns like if (bs->drv->is_filter && bs->file) { ... something about bs->file->bs ... } should be BlockDriverState *filtered =3D bdrv_filter_bs(bs); if (filtered) { ... something about @filtered ... } instead. Signed-off-by: Max Reitz Reviewed-by: Andrey Shinkevich Reviewed-by: Kevin Wolf --- block.c | 31 ++++++++++++++++++++----------- block/io.c | 7 +++++-- migration/block-dirty-bitmap.c | 8 +------- 3 files changed, 26 insertions(+), 20 deletions(-) diff --git a/block.c b/block.c index c09a766f54..887c125400 100644 --- a/block.c +++ b/block.c @@ -712,11 +712,12 @@ int coroutine_fn bdrv_co_delete_file(BlockDriverState= *bs, Error **errp) int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz) { BlockDriver *drv =3D bs->drv; + BlockDriverState *filtered =3D bdrv_filter_bs(bs); =20 if (drv && drv->bdrv_probe_blocksizes) { return drv->bdrv_probe_blocksizes(bs, bsz); - } else if (drv && drv->is_filter && bs->file) { - return bdrv_probe_blocksizes(bs->file->bs, bsz); + } else if (filtered) { + return bdrv_probe_blocksizes(filtered, bsz); } =20 return -ENOTSUP; @@ -731,11 +732,12 @@ int bdrv_probe_blocksizes(BlockDriverState *bs, Block= Sizes *bsz) int bdrv_probe_geometry(BlockDriverState *bs, HDGeometry *geo) { BlockDriver *drv =3D bs->drv; + BlockDriverState *filtered =3D bdrv_filter_bs(bs); =20 if (drv && drv->bdrv_probe_geometry) { return drv->bdrv_probe_geometry(bs, geo); - } else if (drv && drv->is_filter && bs->file) { - return bdrv_probe_geometry(bs->file->bs, geo); + } else if (filtered) { + return bdrv_probe_geometry(filtered, geo); } =20 return -ENOTSUP; @@ -5442,6 +5444,8 @@ int bdrv_has_zero_init_1(BlockDriverState *bs) =20 int bdrv_has_zero_init(BlockDriverState *bs) { + BlockDriverState *filtered; + if (!bs->drv) { return 0; } @@ -5454,8 +5458,10 @@ int bdrv_has_zero_init(BlockDriverState *bs) if (bs->drv->bdrv_has_zero_init) { return bs->drv->bdrv_has_zero_init(bs); } - if (bs->file && bs->drv->is_filter) { - return bdrv_has_zero_init(bs->file->bs); + + filtered =3D bdrv_filter_bs(bs); + if (filtered) { + return bdrv_has_zero_init(filtered); } =20 /* safe default */ @@ -5485,8 +5491,9 @@ int bdrv_get_info(BlockDriverState *bs, BlockDriverIn= fo *bdi) return -ENOMEDIUM; } if (!drv->bdrv_get_info) { - if (bs->file && drv->is_filter) { - return bdrv_get_info(bs->file->bs, bdi); + BlockDriverState *filtered =3D bdrv_filter_bs(bs); + if (filtered) { + return bdrv_get_info(filtered, bdi); } return -ENOTSUP; } @@ -6571,6 +6578,8 @@ int bdrv_amend_options(BlockDriverState *bs, QemuOpts= *opts, bool bdrv_recurse_can_replace(BlockDriverState *bs, BlockDriverState *to_replace) { + BlockDriverState *filtered; + if (!bs || !bs->drv) { return false; } @@ -6585,9 +6594,9 @@ bool bdrv_recurse_can_replace(BlockDriverState *bs, } =20 /* For filters without an own implementation, we can recurse on our ow= n */ - if (bs->drv->is_filter) { - BdrvChild *child =3D bs->file ?: bs->backing; - return bdrv_recurse_can_replace(child->bs, to_replace); + filtered =3D bdrv_filter_bs(bs); + if (filtered) { + return bdrv_recurse_can_replace(filtered, to_replace); } =20 /* Safe default */ diff --git a/block/io.c b/block/io.c index ad3a51ed53..01e3477a77 100644 --- a/block/io.c +++ b/block/io.c @@ -3309,6 +3309,7 @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, i= nt64_t offset, bool exact, Error **errp) { BlockDriverState *bs =3D child->bs; + BdrvChild *filtered; BlockDriver *drv =3D bs->drv; BdrvTrackedRequest req; int64_t old_size, new_bytes; @@ -3360,6 +3361,8 @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, i= nt64_t offset, bool exact, goto out; } =20 + filtered =3D bdrv_filter_child(bs); + /* * If the image has a backing file that is large enough that it would * provide data for the new area, we cannot leave it unallocated becau= se @@ -3392,8 +3395,8 @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, i= nt64_t offset, bool exact, goto out; } ret =3D drv->bdrv_co_truncate(bs, offset, exact, prealloc, flags, = errp); - } else if (bs->file && drv->is_filter) { - ret =3D bdrv_co_truncate(bs->file, offset, exact, prealloc, flags,= errp); + } else if (filtered) { + ret =3D bdrv_co_truncate(filtered, offset, exact, prealloc, flags,= errp); } else { error_setg(errp, "Image format driver does not support resize"); ret =3D -ENOTSUP; diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 549e14daba..5bef793ac0 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -615,13 +615,7 @@ static int init_dirty_bitmap_migration(DBMSaveState *s) while (bs && bs->drv && bs->drv->is_filter && !bdrv_has_named_bitmaps(bs)) { - if (bs->backing) { - bs =3D bs->backing->bs; - } else if (bs->file) { - bs =3D bs->file->bs; - } else { - bs =3D NULL; - } + bs =3D bdrv_filter_bs(bs); } =20 if (bs && bs->drv && !bs->drv->is_filter) { --=20 2.26.2