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bh=qFGmSQHsWrrOfWOH+/peX5MRwaUCO4cXU4Gw5k/UjVE=; b=URpoU3/gNLZ9/GX3XsXFLk1LC3GYaG8g9X2KIRRmJqvGSlekfnFvzlvBDKyy8LUzUUAXDP yUnLNmRYxP1WxbrU03us7OKWXoCVwloxKTFIo1m81DKbBoWWyPMqrqlGzqB9Y+75zvUdOH ajI+duZVMnz1UViWp18vOAhMl/XJ9LY= X-MC-Unique: JivfqxHGO52-JbJt3zM3uA-1 From: Stefan Hajnoczi To: Peter Maydell , qemu-devel@nongnu.org Subject: [PULL 27/30] block/io: bdrv_common_block_status_above: support include_base Date: Fri, 9 Oct 2020 20:35:26 +0100 Message-Id: <20201009193529.322822-28-stefanha@redhat.com> In-Reply-To: <20201009193529.322822-1-stefanha@redhat.com> References: <20201009193529.322822-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=stefanha@redhat.com X-Mimecast-Spam-Score: 0 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; 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charset="utf-8" From: Vladimir Sementsov-Ogievskiy In order to reuse bdrv_common_block_status_above in bdrv_is_allocated_above, let's support include_base parameter. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia Reviewed-by: Eric Blake Message-id: 20200924194003.22080-3-vsementsov@virtuozzo.com Signed-off-by: Stefan Hajnoczi --- block/coroutines.h | 2 ++ block/io.c | 21 ++++++++++++++------- 2 files changed, 16 insertions(+), 7 deletions(-) diff --git a/block/coroutines.h b/block/coroutines.h index f69179f5ef..1cb3128b94 100644 --- a/block/coroutines.h +++ b/block/coroutines.h @@ -41,6 +41,7 @@ bdrv_pwritev(BdrvChild *child, int64_t offset, unsigned i= nt bytes, int coroutine_fn bdrv_co_common_block_status_above(BlockDriverState *bs, BlockDriverState *base, + bool include_base, bool want_zero, int64_t offset, int64_t bytes, @@ -50,6 +51,7 @@ bdrv_co_common_block_status_above(BlockDriverState *bs, int generated_co_wrapper bdrv_common_block_status_above(BlockDriverState *bs, BlockDriverState *base, + bool include_base, bool want_zero, int64_t offset, int64_t bytes, diff --git a/block/io.c b/block/io.c index a718d50ca2..86f76d04bf 100644 --- a/block/io.c +++ b/block/io.c @@ -2343,6 +2343,7 @@ early_out: int coroutine_fn bdrv_co_common_block_status_above(BlockDriverState *bs, BlockDriverState *base, + bool include_base, bool want_zero, int64_t offset, int64_t bytes, @@ -2354,10 +2355,11 @@ bdrv_co_common_block_status_above(BlockDriverState = *bs, BlockDriverState *p; int64_t eof =3D 0; =20 - assert(bs !=3D base); + assert(include_base || bs !=3D base); + assert(!include_base || base); /* Can't include NULL base */ =20 ret =3D bdrv_co_block_status(bs, want_zero, offset, bytes, pnum, map, = file); - if (ret < 0 || *pnum =3D=3D 0 || ret & BDRV_BLOCK_ALLOCATED) { + if (ret < 0 || *pnum =3D=3D 0 || ret & BDRV_BLOCK_ALLOCATED || bs =3D= =3D base) { return ret; } =20 @@ -2368,7 +2370,7 @@ bdrv_co_common_block_status_above(BlockDriverState *b= s, assert(*pnum <=3D bytes); bytes =3D *pnum; =20 - for (p =3D bdrv_filter_or_cow_bs(bs); p !=3D base; + for (p =3D bdrv_filter_or_cow_bs(bs); include_base || p !=3D base; p =3D bdrv_filter_or_cow_bs(p)) { ret =3D bdrv_co_block_status(p, want_zero, offset, bytes, pnum, ma= p, @@ -2406,6 +2408,11 @@ bdrv_co_common_block_status_above(BlockDriverState *= bs, break; } =20 + if (p =3D=3D base) { + assert(include_base); + break; + } + /* * OK, [offset, offset + *pnum) region is unallocated on this laye= r, * let's continue the diving. @@ -2425,7 +2432,7 @@ int bdrv_block_status_above(BlockDriverState *bs, Blo= ckDriverState *base, int64_t offset, int64_t bytes, int64_t *pnum, int64_t *map, BlockDriverState **file) { - return bdrv_common_block_status_above(bs, base, true, offset, bytes, + return bdrv_common_block_status_above(bs, base, false, true, offset, b= ytes, pnum, map, file); } =20 @@ -2442,9 +2449,9 @@ int coroutine_fn bdrv_is_allocated(BlockDriverState *= bs, int64_t offset, int ret; int64_t dummy; =20 - ret =3D bdrv_common_block_status_above(bs, bdrv_filter_or_cow_bs(bs), = false, - offset, bytes, pnum ? pnum : &dum= my, - NULL, NULL); + ret =3D bdrv_common_block_status_above(bs, bs, true, false, offset, + bytes, pnum ? pnum : &dummy, NULL, + NULL); if (ret < 0) { return ret; } --=20 2.26.2