From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54063) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VKQb7-0007Hz-A6 for qemu-devel@nongnu.org; Fri, 13 Sep 2013 06:27:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VKQb1-0003kZ-HR for qemu-devel@nongnu.org; Fri, 13 Sep 2013 06:27:33 -0400 Received: from mx.ipv6.kamp.de ([2a02:248:0:51::16]:56032 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VKQb1-0003jA-4X for qemu-devel@nongnu.org; Fri, 13 Sep 2013 06:27:27 -0400 From: Peter Lieven Date: Fri, 13 Sep 2013 12:25:02 +0200 Message-Id: <1379067909-22984-6-git-send-email-pl@kamp.de> In-Reply-To: <1379067909-22984-1-git-send-email-pl@kamp.de> References: <1379067909-22984-1-git-send-email-pl@kamp.de> Subject: [Qemu-devel] [PATCH 05/12] block: add logical block provisioning information to BlockDriverInfo List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, ronniesahlberg@gmail.com, Peter Lieven , stefanha@redhat.com, anthony@codemonkey.ws, pbonzini@redhat.com Signed-off-by: Peter Lieven --- include/block/block.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/block/block.h b/include/block/block.h index 599de7d..ee17048 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -18,6 +18,15 @@ typedef struct BlockDriverInfo { /* offset at which the VM state can be saved (0 if not possible) */ int64_t vm_state_offset; bool is_dirty; + /* do discarded blocks read back as zeroes? */ + bool discard_zeroes; + /* is write zeroes optimized by a discard/unmap operation? + * this requires support for the BDRV_REQ_MAY_UNMAP flag. */ + bool discard_write_zeroes; + /* maximum number of sectors that can be discarded at once */ + int max_discard; + /* maximum number of sectors that can zeroized at once */ + int max_write_zeroes; } BlockDriverInfo; typedef struct BlockFragInfo { -- 1.7.9.5