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bh=MX+rKV8s6t8HRqLNjOZtl1Zuh8zM2Fy/3MKtICjWe2E=; b=QH1Or2OBvI3BOsIX1yJutAGILkTwiEPGRRlhqDv5fPuFktDt+kXE/7rn1sbmdLm+70fpQe AQpC/DQh6LrShbXNofUJSAxeuCyh3rJMk/JZ9Jzb3k8+cXqipdMJ0PhnRf1MxK4hLJNORx hg3ckTq5urvE8wRZHlcTGvewBY2KPaY= X-MC-Unique: XY5_28lvP1SFXJZjGaxiXg-1 From: Max Reitz To: qemu-block@nongnu.org Subject: [PULL 25/31] block/vpc: return ZERO block-status when appropriate Date: Mon, 6 Jul 2020 12:04:26 +0200 Message-Id: <20200706100432.2301919-26-mreitz@redhat.com> In-Reply-To: <20200706100432.2301919-1-mreitz@redhat.com> References: <20200706100432.2301919-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mreitz@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; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" From: Vladimir Sementsov-Ogievskiy In case when get_image_offset() returns -1, we do zero out the corresponding chunk of qiov. So, this should be reported as ZERO. Note that this changes visible output of "qemu-img map --output=3Djson" and "qemu-io -c map" commands. For qemu-img map, the change is obvious: we just mark as zero what is really zero. For qemu-io it's less obvious: what was unallocated now is allocated. There is an inconsistency in understanding of unallocated regions in Qemu: backing-supporting format-drivers return 0 block-status to report go-to-backing logic for this area. Some protocol-drivers (iscsi) return 0 to report fs-unallocated-non-zero status (i.e., don't occupy space on disk, read result is undefined). BDRV_BLOCK_ALLOCATED is defined as something more close to go-to-backing logic. Still it is calculated as ZERO | DATA, so 0 from iscsi is treated as unallocated. It doesn't influence backing-chain behavior, as iscsi can't have backing file. But it does influence "qemu-io -c map". We should solve this inconsistency at some future point. Now, let's just make backing-not-supporting format drivers (vdi in the previous patch and vpc now) to behave more like backing-supporting drivers and not report 0 block-status. More over, returning ZERO status is absolutely valid thing, and again, corresponds to how the other format-drivers (backing-supporting) work. After block-status update, it never reports 0, so setting unallocated_blocks_are_zero doesn't make sense (as the only user of it is bdrv_co_block_status and it checks unallocated_blocks_are_zero only for unallocated areas). Drop it. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Eric Blake Message-Id: <20200528094405.145708-5-vsementsov@virtuozzo.com> [mreitz: qemu-io -c map as used by iotest 146 now reports everything as allocated; in order to make the test do something useful, we use qemu-img map --output=3Djson now] Signed-off-by: Max Reitz --- block/vpc.c | 3 +- tests/qemu-iotests/146 | 60 ++++-- tests/qemu-iotests/146.out | 405 +++++++++++++++++++++++++++++++++++-- 3 files changed, 436 insertions(+), 32 deletions(-) diff --git a/block/vpc.c b/block/vpc.c index c055591641..01fcd37e3c 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -606,7 +606,6 @@ static int vpc_get_info(BlockDriverState *bs, BlockDriv= erInfo *bdi) bdi->cluster_size =3D s->block_size; } =20 - bdi->unallocated_blocks_are_zero =3D true; return 0; } =20 @@ -745,7 +744,7 @@ static int coroutine_fn vpc_co_block_status(BlockDriver= State *bs, image_offset =3D get_image_offset(bs, offset, false, NULL); allocated =3D (image_offset !=3D -1); *pnum =3D 0; - ret =3D 0; + ret =3D BDRV_BLOCK_ZERO; =20 do { /* All sectors in a block are contiguous (without using the bitmap= ) */ diff --git a/tests/qemu-iotests/146 b/tests/qemu-iotests/146 index 2e43abddfc..ddc3c1fd80 100755 --- a/tests/qemu-iotests/146 +++ b/tests/qemu-iotests/146 @@ -51,19 +51,25 @@ echo =3D=3D=3D Testing VPC Autodetect =3D=3D=3D echo _use_sample_img virtualpc-dynamic.vhd.bz2 =20 -${QEMU_IO} -c "open -o driver=3Dvpc ${TEST_IMG}" -c 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,file.filename=3D$TEST_IMG" \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Testing VPC with current_size force =3D=3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc,force_size_calc=3Dcurrent_size ${TEST_= IMG}" -c 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,force_size_calc=3Dcurrent_size,file.filename=3D$TEST_IMG= " \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Testing VPC with chs force =3D=3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc,force_size_calc=3Dchs ${TEST_IMG}" -c = 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,force_size_calc=3Dchs,file.filename=3D$TEST_IMG" \ + | _filter_qemu_img_map =20 _cleanup_test_img =20 @@ -72,19 +78,25 @@ echo =3D=3D=3D Testing Hyper-V Autodetect =3D=3D=3D echo _use_sample_img hyperv2012r2-dynamic.vhd.bz2 =20 -${QEMU_IO} -c "open -o driver=3Dvpc ${TEST_IMG}" -c 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,file.filename=3D$TEST_IMG" \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Testing Hyper-V with current_size force =3D=3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc,force_size_calc=3Dcurrent_size ${TEST_= IMG}" -c 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,force_size_calc=3Dcurrent_size,file.filename=3D$TEST_IMG= " \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Testing Hyper-V with chs force =3D=3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc,force_size_calc=3Dchs ${TEST_IMG}" -c = 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,force_size_calc=3Dchs,file.filename=3D$TEST_IMG" \ + | _filter_qemu_img_map =20 _cleanup_test_img =20 @@ -93,19 +105,25 @@ echo =3D=3D=3D Testing d2v Autodetect =3D=3D=3D echo _use_sample_img d2v-zerofilled.vhd.bz2 =20 -${QEMU_IO} -c "open -o driver=3Dvpc ${TEST_IMG}" -c 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,file.filename=3D$TEST_IMG" \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Testing d2v with current_size force =3D=3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc,force_size_calc=3Dcurrent_size ${TEST_= IMG}" -c 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,force_size_calc=3Dcurrent_size,file.filename=3D$TEST_IMG= " \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Testing d2v with chs force =3D=3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc,force_size_calc=3Dchs ${TEST_IMG}" -c = 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,force_size_calc=3Dchs,file.filename=3D$TEST_IMG" \ + | _filter_qemu_img_map =20 _cleanup_test_img =20 @@ -121,19 +139,25 @@ echo echo =3D=3D=3D Read created image, default opts =3D=3D=3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc ${TEST_IMG}" -c 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,file.filename=3D$TEST_IMG" \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Read created image, force_size_calc=3Dchs =3D=3D=3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc,force_size_calc=3Dchs ${TEST_IMG}" -c = 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,force_size_calc=3Dchs,file.filename=3D$TEST_IMG" \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Read created image, force_size_calc=3Dcurrent_size =3D=3D= =3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc,force_size_calc=3Dcurrent_size ${TEST_= IMG}" -c 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,force_size_calc=3Dcurrent_size,file.filename=3D$TEST_IMG= " \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Testing Image create, force_size =3D=3D=3D @@ -145,19 +169,25 @@ echo echo =3D=3D=3D Read created image, default opts =3D=3D=3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc ${TEST_IMG}" -c 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,file.filename=3D$TEST_IMG" \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Read created image, force_size_calc=3Dchs =3D=3D=3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc,force_size_calc=3Dchs ${TEST_IMG}" -c = 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,force_size_calc=3Dchs,file.filename=3D$TEST_IMG" \ + | _filter_qemu_img_map =20 echo echo =3D=3D=3D Read created image, force_size_calc=3Dcurrent_size =3D=3D= =3D=3D echo =20 -${QEMU_IO} -c "open -o driver=3Dvpc,force_size_calc=3Dcurrent_size ${TEST_= IMG}" -c 'map' +$QEMU_IMG map --output=3Djson --image-opts \ + "driver=3Dvpc,force_size_calc=3Dcurrent_size,file.filename=3D$TEST_IMG= " \ + | _filter_qemu_img_map =20 echo "*** done" rm -f $seq.full diff --git a/tests/qemu-iotests/146.out b/tests/qemu-iotests/146.out index 1332189d87..80513cdd06 100644 --- a/tests/qemu-iotests/146.out +++ b/tests/qemu-iotests/146.out @@ -2,39 +2,414 @@ QA output created by 146 =20 =3D=3D=3D Testing VPC Autodetect =3D=3D=3D =20 -126.998 GiB (0x1fbfe04000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 136363130880, "depth": 0, "zero": true, "data": f= alse }] =20 =3D=3D=3D Testing VPC with current_size force =3D=3D=3D =20 -127 GiB (0x1fc0000000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 136365211648, "depth": 0, "zero": true, "data": f= alse }] =20 =3D=3D=3D Testing VPC with chs force =3D=3D=3D =20 -126.998 GiB (0x1fbfe04000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 136363130880, "depth": 0, "zero": true, "data": f= alse }] =20 =3D=3D=3D Testing Hyper-V Autodetect =3D=3D=3D =20 -127 GiB (0x1fc0000000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 136365211648, "depth": 0, "zero": true, "data": f= alse }] =20 =3D=3D=3D Testing Hyper-V with current_size force =3D=3D=3D =20 -127 GiB (0x1fc0000000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 136365211648, "depth": 0, "zero": true, "data": f= alse }] =20 =3D=3D=3D Testing Hyper-V with chs force =3D=3D=3D =20 -126.998 GiB (0x1fbfe04000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 136363130880, "depth": 0, "zero": true, "data": f= alse }] =20 =3D=3D=3D Testing d2v Autodetect =3D=3D=3D =20 -251.250 MiB (0xfb40000) bytes allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 2097152, "depth": 0, "zero": false, "data": true,= "offset": OFFSET }, +{ "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": = true, "offset": OFFSET }, +{ "start": 4194304, "length": 2097152, "depth": 0, "zero": false, "data": = true, "offset": OFFSET }, +{ "start": 6291456, "length": 2097152, "depth": 0, "zero": false, "data": = true, "offset": OFFSET }, +{ "start": 8388608, "length": 2097152, "depth": 0, "zero": false, "data": = true, "offset": OFFSET }, +{ "start": 10485760, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 12582912, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 14680064, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 16777216, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 18874368, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 20971520, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 23068672, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 25165824, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 27262976, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 29360128, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 31457280, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 33554432, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 35651584, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 37748736, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 39845888, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 41943040, "length": 2097152, "depth": 0, "zero": false, "data":= true, "offset": OFFSET }, +{ "start": 44040192, "length": 2097152, "depth": 0, "zero": false, "data":= 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"zero": false, "data"= : true, "offset": OFFSET }, +{ "start": 255852544, "length": 2097152, "depth": 0, "zero": false, "data"= : true, "offset": OFFSET }, +{ "start": 257949696, "length": 2097152, "depth": 0, "zero": false, "data"= : true, "offset": OFFSET }, +{ "start": 260046848, "length": 2097152, "depth": 0, "zero": false, "data"= : true, "offset": OFFSET }, +{ "start": 262144000, "length": 1310720, "depth": 0, "zero": false, "data"= : true, "offset": OFFSET }] =20 =3D=3D=3D Testing Image create, default =3D=3D=3D =20 @@ -42,15 +417,15 @@ Formatting 'TEST_DIR/IMGFMT-create-test.IMGFMT', fmt= =3DIMGFMT size=3D4294967296 =20 =3D=3D=3D Read created image, default opts =3D=3D=3D=3D =20 -4 GiB (0x10007a000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 4295467008, "depth": 0, "zero": true, "data": fal= se }] =20 =3D=3D=3D Read created image, force_size_calc=3Dchs =3D=3D=3D=3D =20 -4 GiB (0x10007a000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 4295467008, "depth": 0, "zero": true, "data": fal= se }] =20 =3D=3D=3D Read created image, force_size_calc=3Dcurrent_size =3D=3D=3D=3D =20 -4 GiB (0x10007a000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 4295467008, "depth": 0, "zero": true, "data": fal= se }] =20 =3D=3D=3D Testing Image create, force_size =3D=3D=3D =20 @@ -58,13 +433,13 @@ Formatting 'TEST_DIR/IMGFMT-create-test.IMGFMT', fmt= =3DIMGFMT size=3D4294967296 =20 =3D=3D=3D Read created image, default opts =3D=3D=3D=3D =20 -4 GiB (0x100000000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 4294967296, "depth": 0, "zero": true, "data": fal= se }] =20 =3D=3D=3D Read created image, force_size_calc=3Dchs =3D=3D=3D=3D =20 -4 GiB (0x100000000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 4294967296, "depth": 0, "zero": true, "data": fal= se }] =20 =3D=3D=3D Read created image, force_size_calc=3Dcurrent_size =3D=3D=3D=3D =20 -4 GiB (0x100000000) bytes not allocated at offset 0 bytes (0x0) +[{ "start": 0, "length": 4294967296, "depth": 0, "zero": true, "data": fal= se }] *** done --=20 2.26.2