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authorKevin Wolf <kwolf@redhat.com>2018-01-10 15:52:33 +0100
committerKevin Wolf <kwolf@redhat.com>2018-03-09 15:17:47 +0100
commite1d74bc6c61f9be8c1eb19f39d96b08e7332c864 (patch)
tree5e79f87e43503d153a32585b71220b197a342556 /block/qcow2.c
parent29ca9e450dd0fd5961f5f3c12f8e983707ec71ed (diff)
qcow2: Use BlockdevRef in qcow2_co_create()
Instead of passing a separate BlockDriverState* into qcow2_co_create(), make use of the BlockdevRef that is included in BlockdevCreateOptions. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/qcow2.c')
-rw-r--r--block/qcow2.c39
1 files changed, 25 insertions, 14 deletions
diff --git a/block/qcow2.c b/block/qcow2.c
index 7679c28f57..b7df2d5cab 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2768,8 +2768,8 @@ static uint64_t qcow2_opt_get_refcount_bits_del(QemuOpts *opts, int version,
}
static int coroutine_fn
-qcow2_co_create(BlockDriverState *bs, BlockdevCreateOptions *create_options,
- QemuOpts *opts, const char *encryptfmt, Error **errp)
+qcow2_co_create(BlockdevCreateOptions *create_options, QemuOpts *opts,
+ const char *encryptfmt, Error **errp)
{
BlockdevCreateOptionsQcow2 *qcow2_opts;
QDict *options;
@@ -2786,7 +2786,8 @@ qcow2_co_create(BlockDriverState *bs, BlockdevCreateOptions *create_options,
* 2 GB for 64k clusters, and we don't want to have a 2 GB initial file
* size for any qcow2 image.
*/
- BlockBackend *blk;
+ BlockBackend *blk = NULL;
+ BlockDriverState *bs = NULL;
QCowHeader *header;
size_t cluster_size;
int version;
@@ -2795,10 +2796,15 @@ qcow2_co_create(BlockDriverState *bs, BlockdevCreateOptions *create_options,
Error *local_err = NULL;
int ret;
- /* Validate options and set default values */
assert(create_options->driver == BLOCKDEV_DRIVER_QCOW2);
qcow2_opts = &create_options->u.qcow2;
+ bs = bdrv_open_blockdev_ref(qcow2_opts->file, errp);
+ if (bs == NULL) {
+ return -EIO;
+ }
+
+ /* Validate options and set default values */
if (!QEMU_IS_ALIGNED(qcow2_opts->size, BDRV_SECTOR_SIZE)) {
error_setg(errp, "Image size must be a multiple of 512 bytes");
ret = -EINVAL;
@@ -2827,7 +2833,8 @@ qcow2_co_create(BlockDriverState *bs, BlockdevCreateOptions *create_options,
}
if (!validate_cluster_size(cluster_size, errp)) {
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
if (!qcow2_opts->has_preallocation) {
@@ -2838,11 +2845,13 @@ qcow2_co_create(BlockDriverState *bs, BlockdevCreateOptions *create_options,
{
error_setg(errp, "Backing file and preallocation cannot be used at "
"the same time");
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
if (qcow2_opts->has_backing_fmt && !qcow2_opts->has_backing_file) {
error_setg(errp, "Backing format cannot be used without backing file");
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
if (!qcow2_opts->has_lazy_refcounts) {
@@ -2851,7 +2860,8 @@ qcow2_co_create(BlockDriverState *bs, BlockdevCreateOptions *create_options,
if (version < 3 && qcow2_opts->lazy_refcounts) {
error_setg(errp, "Lazy refcounts only supported with compatibility "
"level 1.1 and above (use compat=1.1 or greater)");
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
if (!qcow2_opts->has_refcount_bits) {
@@ -2862,13 +2872,15 @@ qcow2_co_create(BlockDriverState *bs, BlockdevCreateOptions *create_options,
{
error_setg(errp, "Refcount width must be a power of two and may not "
"exceed 64 bits");
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
if (version < 3 && qcow2_opts->refcount_bits != 16) {
error_setg(errp, "Different refcount widths than 16 bits require "
"compatibility level 1.1 or above (use compat=1.1 or "
"greater)");
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
refcount_order = ctz32(qcow2_opts->refcount_bits);
@@ -3026,9 +3038,8 @@ qcow2_co_create(BlockDriverState *bs, BlockdevCreateOptions *create_options,
ret = 0;
out:
- if (blk) {
- blk_unref(blk);
- }
+ blk_unref(blk);
+ bdrv_unref(bs);
return ret;
}
@@ -3157,7 +3168,7 @@ static int coroutine_fn qcow2_co_create_opts(const char *filename, QemuOpts *opt
.refcount_bits = refcount_bits,
},
};
- ret = qcow2_co_create(bs, &create_options, opts, encryptfmt, errp);
+ ret = qcow2_co_create(&create_options, opts, encryptfmt, errp);
if (ret < 0) {
goto finish;
}