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| author | Paolo Bonzini <pbonzini@redhat.com> | 2013-09-04 19:00:30 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2013-09-06 15:25:09 +0200 |
| commit | 4bc74be997a72922170f4f272fd5e8074a3ecc27 (patch) | |
| tree | c3b466014f752398a8b9543e99da0651bb12c759 /block/qcow2.c | |
| parent | 4333bb71405f58a8dc8d3255feb3ca5960b0daf8 (diff) | |
| download | qemu-4bc74be997a72922170f4f272fd5e8074a3ecc27.tar.gz qemu-4bc74be997a72922170f4f272fd5e8074a3ecc27.tar.bz2 qemu-4bc74be997a72922170f4f272fd5e8074a3ecc27.zip | |
block: return get_block_status data and flags for formats
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block/qcow2.c')
| -rw-r--r-- | block/qcow2.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index c220654ef3..578792f0a3 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -693,7 +693,8 @@ static int64_t coroutine_fn qcow2_co_get_block_status(BlockDriverState *bs, { BDRVQcowState *s = bs->opaque; uint64_t cluster_offset; - int ret; + int index_in_cluster, ret; + int64_t status = 0; *pnum = nb_sectors; qemu_co_mutex_lock(&s->lock); @@ -703,7 +704,18 @@ static int64_t coroutine_fn qcow2_co_get_block_status(BlockDriverState *bs, return ret; } - return (cluster_offset != 0) || (ret == QCOW2_CLUSTER_ZERO); + if (cluster_offset != 0 && ret != QCOW2_CLUSTER_COMPRESSED && + !s->crypt_method) { + index_in_cluster = sector_num & (s->cluster_sectors - 1); + cluster_offset |= (index_in_cluster << BDRV_SECTOR_BITS); + status |= BDRV_BLOCK_OFFSET_VALID | cluster_offset; + } + if (ret == QCOW2_CLUSTER_ZERO) { + status |= BDRV_BLOCK_ZERO; + } else if (ret != QCOW2_CLUSTER_UNALLOCATED) { + status |= BDRV_BLOCK_DATA; + } + return status; } /* handle reading after the end of the backing file */ |