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block: Handle error of bdrv_getlength in bdrv_create_dirty_bitmap

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bdrv_getlength could fail, check the return value before using it.
Return NULL and set errno if it fails. Callers are updated to handle
the error case.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2014-04-16 09:34:30 +08:00 • committed by Kevin Wolf
parent 4ab9dab5b9
commit b8afb520e4
4 changed files with 41 additions and 8 deletions
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5
block/mirror.c
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@ -605,7 +605,10 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target,
s->granularity = granularity;
s->buf_size = MAX(buf_size, granularity);
s->dirty_bitmap = bdrv_create_dirty_bitmap(bs, granularity);
s->dirty_bitmap = bdrv_create_dirty_bitmap(bs, granularity, errp);
if (!s->dirty_bitmap) {
return;
}
bdrv_set_enable_write_cache(s->target, true);
bdrv_set_on_error(s->target, on_target_error, on_target_error);
bdrv_iostatus_enable(s->target);