From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56908) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fGQYt-0007o4-TQ for qemu-devel@nongnu.org; Wed, 09 May 2018 10:59:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fGQYt-0007WT-5n for qemu-devel@nongnu.org; Wed, 09 May 2018 10:59:23 -0400 From: Fam Zheng Date: Wed, 9 May 2018 22:58:14 +0800 Message-Id: <20180509145815.3330-9-famz@redhat.com> In-Reply-To: <20180509145815.3330-1-famz@redhat.com> References: <20180509145815.3330-1-famz@redhat.com> Subject: [Qemu-devel] [PATCH v3 8/9] block-backend: Add blk_co_copy_range List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Ronnie Sahlberg , qemu-block@nongnu.org, Kevin Wolf , Fam Zheng , Peter Lieven , Max Reitz , Stefan Hajnoczi It's a BlockBackend wrapper of the BDS interface. Signed-off-by: Fam Zheng --- block/block-backend.c | 18 ++++++++++++++++++ include/sysemu/block-backend.h | 4 ++++ 2 files changed, 22 insertions(+) diff --git a/block/block-backend.c b/block/block-backend.c index 681b240b12..5562ec4238 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -2217,3 +2217,21 @@ void blk_unregister_buf(BlockBackend *blk, void *host) { bdrv_unregister_buf(blk_bs(blk), host); } + +int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in, + BlockBackend *blk_out, int64_t off_out, + int bytes, BdrvRequestFlags flags) +{ + int r; + r = blk_check_byte_request(blk_in, off_in, bytes); + if (r) { + return r; + } + r = blk_check_byte_request(blk_out, off_out, bytes); + if (r) { + return r; + } + return bdrv_co_copy_range(blk_in->root, off_in, + blk_out->root, off_out, + bytes, flags); +} diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 92ab624fac..6f043b6b51 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -232,4 +232,8 @@ void blk_set_force_allow_inactivate(BlockBackend *blk); void blk_register_buf(BlockBackend *blk, void *host, size_t size); void blk_unregister_buf(BlockBackend *blk, void *host); +int blk_co_copy_range(BlockBackend *blk_in, int64_t off_in, + BlockBackend *blk_out, int64_t off_out, + int bytes, BdrvRequestFlags flags); + #endif -- 2.14.3