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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>
master
Stefan Hajnoczi 2017-07-05 13:57:31 +01:00 committed by Max Reitz
parent 90880ff107
commit a843a22a82
1 changed files with 26 additions and 0 deletions
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26
block/raw-format.c
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@ -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,