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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2017-07-05 13:57:31 +0100 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2017-07-11 17:45:00 +0200 |
| commit | a843a22a82e0b2bf5841af8a074066ea1d18997a (patch) | |
| tree | aee2505b1aaa36d4608ea88a1a73302b73c270d5 /block/raw-format.c | |
| parent | 90880ff107ecaada2a06a823dc5fa652f6e37a62 (diff) | |
| download | qemu-a843a22a82e0b2bf5841af8a074066ea1d18997a.tar.gz | |
raw-format: add bdrv_measure() support
Maximum size calculation is trivial for the raw format: it's just the
requested image size (because there is no metadata).
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-id: 20170705125738.8777-3-stefanha@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/raw-format.c')
| -rw-r--r-- | block/raw-format.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/block/raw-format.c b/block/raw-format.c index 1ea8c2d7ff..a1622c6219 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -312,6 +312,31 @@ static int64_t raw_getlength(BlockDriverState *bs) return s->size; } +static BlockMeasureInfo *raw_measure(QemuOpts *opts, BlockDriverState *in_bs, + Error **errp) +{ + BlockMeasureInfo *info; + int64_t required; + + if (in_bs) { + required = bdrv_getlength(in_bs); + if (required < 0) { + error_setg_errno(errp, -required, "Unable to get image size"); + return NULL; + } + } else { + required = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), + BDRV_SECTOR_SIZE); + } + + info = g_new(BlockMeasureInfo, 1); + info->required = required; + + /* Unallocated sectors count towards the file size in raw images */ + info->fully_allocated = info->required; + return info; +} + static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) { return bdrv_get_info(bs->file->bs, bdi); @@ -479,6 +504,7 @@ BlockDriver bdrv_raw = { .bdrv_truncate = &raw_truncate, .bdrv_getlength = &raw_getlength, .has_variable_length = true, + .bdrv_measure = &raw_measure, .bdrv_get_info = &raw_get_info, .bdrv_refresh_limits = &raw_refresh_limits, .bdrv_probe_blocksizes = &raw_probe_blocksizes, |