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qcow2: Simplify preallocation code 

Image creation already involves a bdrv_co_truncate() call, which allows
to specify a preallocation mode. Just pass the right mode there and
remove the code that is made redundant by this.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2019-02-21 15:48:11 +01:00
parent 97f94cb4f8
commit c5e86ebc11
1 changed files with 1 additions and 27 deletions
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28
block/qcow2.c
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@ -2952,19 +2952,6 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
goto out;
}
if (qcow2_opts->preallocation == PREALLOC_MODE_FULL ||
qcow2_opts->preallocation == PREALLOC_MODE_FALLOC)
{
int64_t prealloc_size =
qcow2_calc_prealloc_size(qcow2_opts->size, cluster_size,
refcount_order);
ret = blk_truncate(blk, prealloc_size, qcow2_opts->preallocation, errp);
if (ret < 0) {
goto out;
}
}
/* Write the header */
QEMU_BUILD_BUG_ON((1 << MIN_CLUSTER_BITS) < sizeof(*header));
header = g_malloc0(cluster_size);
@ -3046,7 +3033,7 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
}
/* Okay, now that we have a valid image, let's give it the right size */
ret = blk_truncate(blk, qcow2_opts->size, PREALLOC_MODE_OFF, errp);
ret = blk_truncate(blk, qcow2_opts->size, qcow2_opts->preallocation, errp);
if (ret < 0) {
error_prepend(errp, "Could not resize image: ");
goto out;
@ -3078,19 +3065,6 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
}
}
/* And if we're supposed to preallocate metadata, do that now */
if (qcow2_opts->preallocation != PREALLOC_MODE_OFF) {
BDRVQcow2State *s = blk_bs(blk)->opaque;
qemu_co_mutex_lock(&s->lock);
ret = preallocate_co(blk_bs(blk), 0, qcow2_opts->size);
qemu_co_mutex_unlock(&s->lock);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not preallocate metadata");
goto out;
}
}
blk_unref(blk);
blk = NULL;