block: Merge .bdrv_co_writev{,_flags} in drivers
We have too many driver callback interfaces; simplify the mess
somewhat by merging the flags parameter of .bdrv_co_writev_flags()
into .bdrv_co_writev(). Note that as long as a driver doesn't set
.supported_write_flags, the flags argument will be 0 and behavior is
identical. Also note that the public function bdrv_co_writev() still
lacks a flags argument; so the driver signature is thus intentionally
slightly different. But that's not the end of the world, nor the first
time that the driver interface differs slightly from the public
interface.
Ideally, we should be rewriting all of these drivers to use modern
byte-based interfaces. But that's a more invasive patch to write
and audit, compared to the simplification done here.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/block/qcow.c b/block/qcow.c
index 4b2f7db..3ba2ca2 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -720,7 +720,8 @@
}
static coroutine_fn int qcow_co_writev(BlockDriverState *bs, int64_t sector_num,
- int nb_sectors, QEMUIOVector *qiov)
+ int nb_sectors, QEMUIOVector *qiov,
+ int flags)
{
BDRVQcowState *s = bs->opaque;
int index_in_cluster;
@@ -731,6 +732,7 @@
uint8_t *buf;
void *orig_buf;
+ assert(!flags);
s->cluster_cache_offset = -1; /* disable compressed cache */
/* We must always copy the iov when encrypting, so we
@@ -1110,7 +1112,7 @@
if (ret != Z_STREAM_END || out_len >= s->cluster_size) {
/* could not compress: write normal cluster */
ret = qcow_co_writev(bs, offset >> BDRV_SECTOR_BITS,
- bytes >> BDRV_SECTOR_BITS, qiov);
+ bytes >> BDRV_SECTOR_BITS, qiov, 0);
if (ret < 0) {
goto fail;
}
