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blkdebug: Support .bdrv_co_get_block_status

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Without a passthrough status of BDRV_BLOCK_RAW, anything wrapped by
blkdebug appears 100% allocated as data.  Better is treating it the
same as the underlying file being wrapped.

Update iotest 177 for the new expected output.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Eric Blake 2017-06-05 15:38:45 -05:00 committed by Kevin Wolf
parent d5254033da
commit 544daf6679
2 changed files with 15 additions and 1 deletions
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11
block/blkdebug.c
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@ -641,6 +641,16 @@ static int coroutine_fn blkdebug_co_pdiscard(BlockDriverState *bs,
return bdrv_co_pdiscard(bs->file->bs, offset, bytes);
}
static int64_t coroutine_fn blkdebug_co_get_block_status(
BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum,
BlockDriverState **file)
{
*pnum = nb_sectors;
*file = bs->file->bs;
return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID |
(sector_num << BDRV_SECTOR_BITS);
}
static void blkdebug_close(BlockDriverState *bs)
{
BDRVBlkdebugState *s = bs->opaque;
@ -915,6 +925,7 @@ static BlockDriver bdrv_blkdebug = {
.bdrv_co_flush_to_disk = blkdebug_co_flush,
.bdrv_co_pwrite_zeroes = blkdebug_co_pwrite_zeroes,
.bdrv_co_pdiscard = blkdebug_co_pdiscard,
.bdrv_co_get_block_status = blkdebug_co_get_block_status,
.bdrv_debug_event = blkdebug_debug_event,
.bdrv_debug_breakpoint = blkdebug_debug_breakpoint,

5
tests/qemu-iotests/177.out
View File

@ -46,6 +46,9 @@ read 30408704/30408704 bytes at offset 80740352
read 23068672/23068672 bytes at offset 111149056
22 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Offset Length File
0 0x8000000 json:{"image": {"driver": "IMGFMT", "file": {"driver": "file", "filename": "TEST_DIR/t.IMGFMT"}}, "driver": "blkdebug", "align": "4k"}
0 0x800000 TEST_DIR/t.IMGFMT
0x900000 0x2400000 TEST_DIR/t.IMGFMT
0x3c00000 0x1100000 TEST_DIR/t.IMGFMT
0x6a00000 0x1600000 TEST_DIR/t.IMGFMT
No errors were found on the image.
*** done