From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60783) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f1VRQ-0001nM-MT for qemu-devel@nongnu.org; Thu, 29 Mar 2018 07:10:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f1VRP-0003IE-NO for qemu-devel@nongnu.org; Thu, 29 Mar 2018 07:10:00 -0400 From: Fam Zheng Date: Thu, 29 Mar 2018 19:09:12 +0800 Message-Id: <20180329110914.20888-7-famz@redhat.com> In-Reply-To: <20180329110914.20888-1-famz@redhat.com> References: <20180329110914.20888-1-famz@redhat.com> Subject: [Qemu-devel] [RFC PATCH 6/8] raw: Implement raw_co_map_range List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, Fam Zheng , Kevin Wolf , Max Reitz , pbonzini@redhat.com, Stefan Hajnoczi , eblake@redhat.com Because raw can be seen as a "passthrough" format, its implementation of bdrv_co_map_range is exactly the same as bdrv_co_block_status. The BDRV_REQ_ALLOCATE flag can be ignored because no metadata update is necessary. Signed-off-by: Fam Zheng --- block/raw-format.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/block/raw-format.c b/block/raw-format.c index a378547c99..95e81af22d 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -263,6 +263,14 @@ static int coroutine_fn raw_co_block_status(BlockDriverState *bs, return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID; } +static int coroutine_fn raw_co_map_range(BlockDriverState *bs, int64_t offset, + int64_t bytes, int64_t *pnum, int64_t *map, + BlockDriverState **file, + int flags) +{ + return raw_co_block_status(bs, true, offset, bytes, pnum, map, file); +} + static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes, BdrvRequestFlags flags) @@ -498,6 +506,7 @@ BlockDriver bdrv_raw = { .bdrv_co_pwrite_zeroes = &raw_co_pwrite_zeroes, .bdrv_co_pdiscard = &raw_co_pdiscard, .bdrv_co_block_status = &raw_co_block_status, + .bdrv_co_map_range = &raw_co_map_range, .bdrv_truncate = &raw_truncate, .bdrv_getlength = &raw_getlength, .has_variable_length = true, -- 2.14.3