From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45049) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gTsOd-0006NM-1G for qemu-devel@nongnu.org; Mon, 03 Dec 2018 12:52:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gTsOa-0007T5-Fl for qemu-devel@nongnu.org; Mon, 03 Dec 2018 12:52:38 -0500 From: Max Reitz Date: Mon, 3 Dec 2018 18:52:09 +0100 Message-Id: <20181203175211.8230-5-mreitz@redhat.com> In-Reply-To: <20181203175211.8230-1-mreitz@redhat.com> References: <20181203175211.8230-1-mreitz@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH for-next 4/6] blkdebug: Add "none" event List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, Max Reitz , Kevin Wolf , Eric Blake , Markus Armbruster Together with @iotypes and @sector, this can be used to trap e.g. the first read or write access to a certain sector without having to know what happens internally in the block layer, i.e. which "real" events happen right before such an access. Signed-off-by: Max Reitz --- qapi/block-core.json | 4 +++- block/blkdebug.c | 2 ++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/qapi/block-core.json b/qapi/block-core.json index 469d889753..045206196b 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -3004,6 +3004,8 @@ # # @cor_write: a write due to copy-on-read (since 2.11) # +# @none: triggers once at creation of the blkdebug node (since 4.0) +# # Since: 2.9 ## { 'enum': 'BlkdebugEvent', 'prefix': 'BLKDBG', @@ -3022,7 +3024,7 @@ 'pwritev_rmw_tail', 'pwritev_rmw_after_tail', 'pwritev', 'pwritev_zero', 'pwritev_done', 'empty_image_prepare', 'l1_shrink_write_table', 'l1_shrink_free_l2_clusters', - 'cor_write'] } + 'cor_write', 'none' ] } =20 ## # @BlkdebugIOType: diff --git a/block/blkdebug.c b/block/blkdebug.c index d15b6c5fef..51f07648ba 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -491,6 +491,8 @@ static int blkdebug_open(BlockDriverState *bs, QDict = *options, int flags, goto out; } =20 + bdrv_debug_event(bs, BLKDBG_NONE); + ret =3D 0; out: if (ret < 0) { --=20 2.19.2