block: remove BlockDriver.bdrv_write_compressed

There are no block drivers left that implement the old
.bdrv_write_compressed interface, so it can be removed. Also now we have
no need to use the bdrv_pwrite_compressed function and we can remove it
entirely.

Signed-off-by: Pavel Butsykin <pbutsykin@virtuozzo.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Jeff Cody <jcody@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
CC: Eric Blake <eblake@redhat.com>
CC: John Snow <jsnow@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

2 files changed, 2 insertions, 37 deletions

diff --git a/block/block-backend.c b/block/block-backend.c
index 76ea45955f..d1349d90e5 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -1488,12 +1488,8 @@ int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
 int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
                           int count)
 {
-    int ret = blk_check_byte_request(blk, offset, count);
-    if (ret < 0) {
-        return ret;
-    }
-
-    return bdrv_pwrite_compressed(blk->root, offset, buf, count);
+    return blk_prw(blk, offset, (void *) buf, count, blk_write_entry,
+                   BDRV_REQ_WRITE_COMPRESSED);
 }
 
 int blk_truncate(BlockBackend *blk, int64_t offset)
diff --git a/block/io.c b/block/io.c
index d402076e95..0339911dbb 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1887,37 +1887,6 @@ int bdrv_is_allocated_above(BlockDriverState *top,
     return 0;
 }
 
-int bdrv_pwrite_compressed(BdrvChild *child, int64_t offset,
-                           const void *buf, int bytes)
-{
-    BlockDriverState *bs = child->bs;
-    BlockDriver *drv = bs->drv;
-    QEMUIOVector qiov;
-    struct iovec iov;
-
-    if (!drv) {
-        return -ENOMEDIUM;
-    }
-    if (drv->bdrv_write_compressed) {
-        int ret = bdrv_check_byte_request(bs, offset, bytes);
-        if (ret < 0) {
-            return ret;
-        }
-        assert(QLIST_EMPTY(&bs->dirty_bitmaps));
-        assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-        assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
-        return drv->bdrv_write_compressed(bs, offset >> BDRV_SECTOR_BITS, buf,
-                                          bytes >> BDRV_SECTOR_BITS);
-    }
-    iov = (struct iovec) {
-        .iov_base = (void *)buf,
-        .iov_len = bytes,
-    };
-    qemu_iovec_init_external(&qiov, &iov, 1);
-
-    return bdrv_prwv_co(child, offset, &qiov, true, BDRV_REQ_WRITE_COMPRESSED);
-}
-
 typedef struct BdrvVmstateCo {
     BlockDriverState    *bs;
     QEMUIOVector        *qiov;