block: Remove unused sector-based vectored I/O

We are gradually moving away from sector-based interfaces, towards
byte-based.  Now that all callers of vectored I/O have been converted
to use our preferred byte-based bdrv_co_p{read,write}v(), we can
delete the unused bdrv_co_{read,write}v().

Furthermore, this gets rid of the signature difference between the
public bdrv_co_writev() and the callback .bdrv_co_writev (the
latter still exists, because some drivers still need more work
before they are fully byte-based).
Signed-off-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

block/io.c

@@ -1429,24 +1429,6 @@ int coroutine_fn bdrv_co_preadv(BdrvChild *child,
     return ret;
 }
 
-static int coroutine_fn bdrv_co_do_readv(BdrvChild *child,
-    int64_t sector_num, int nb_sectors, QEMUIOVector *qiov,
-    BdrvRequestFlags flags)
-{
-    if (nb_sectors < 0 || nb_sectors > BDRV_REQUEST_MAX_SECTORS) {
-        return -EINVAL;
-    }
-
-    return bdrv_co_preadv(child, sector_num << BDRV_SECTOR_BITS,
-                          nb_sectors << BDRV_SECTOR_BITS, qiov, flags);
-}
-
-int coroutine_fn bdrv_co_readv(BdrvChild *child, int64_t sector_num,
-                               int nb_sectors, QEMUIOVector *qiov)
-{
-    return bdrv_co_do_readv(child, sector_num, nb_sectors, qiov, 0);
-}
-
 static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
     int64_t offset, int bytes, BdrvRequestFlags flags)
 {
@@ -1889,24 +1871,6 @@ out:
     return ret;
 }
 
-static int coroutine_fn bdrv_co_do_writev(BdrvChild *child,
-    int64_t sector_num, int nb_sectors, QEMUIOVector *qiov,
-    BdrvRequestFlags flags)
-{
-    if (nb_sectors < 0 || nb_sectors > BDRV_REQUEST_MAX_SECTORS) {
-        return -EINVAL;
-    }
-
-    return bdrv_co_pwritev(child, sector_num << BDRV_SECTOR_BITS,
-                           nb_sectors << BDRV_SECTOR_BITS, qiov, flags);
-}
-
-int coroutine_fn bdrv_co_writev(BdrvChild *child, int64_t sector_num,
-    int nb_sectors, QEMUIOVector *qiov)
-{
-    return bdrv_co_do_writev(child, sector_num, nb_sectors, qiov, 0);
-}
-
 int coroutine_fn bdrv_co_pwrite_zeroes(BdrvChild *child, int64_t offset,
                                        int bytes, BdrvRequestFlags flags)
 {

include/block/block.h

@@ -285,10 +285,6 @@ int bdrv_pwrite(BdrvChild *child, int64_t offset, const void *buf, int bytes);
 int bdrv_pwritev(BdrvChild *child, int64_t offset, QEMUIOVector *qiov);
 int bdrv_pwrite_sync(BdrvChild *child, int64_t offset,
                      const void *buf, int count);
-int coroutine_fn bdrv_co_readv(BdrvChild *child, int64_t sector_num,
-                               int nb_sectors, QEMUIOVector *qiov);
-int coroutine_fn bdrv_co_writev(BdrvChild *child, int64_t sector_num,
-                               int nb_sectors, QEMUIOVector *qiov);
 /*
  * Efficiently zero a region of the disk image.  Note that this is a regular
  * I/O request like read or write and should have a reasonable size.  This