From patchwork Fri Jul 29 04:49:38 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Devin Nakamura X-Patchwork-Id: 107340 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [140.186.70.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 7C5BEB6F64 for ; Fri, 29 Jul 2011 15:26:39 +1000 (EST) Received: from localhost ([::1]:36907 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Qmf2n-0004JM-WB for incoming@patchwork.ozlabs.org; Fri, 29 Jul 2011 00:51:29 -0400 Received: from eggs.gnu.org ([140.186.70.92]:41337) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Qmf1m-0001oz-V4 for qemu-devel@nongnu.org; Fri, 29 Jul 2011 00:50:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Qmf1l-0000QG-Px for qemu-devel@nongnu.org; Fri, 29 Jul 2011 00:50:26 -0400 Received: from mail-iy0-f173.google.com ([209.85.210.173]:46817) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Qmf1l-0000NN-9h for qemu-devel@nongnu.org; Fri, 29 Jul 2011 00:50:25 -0400 Received: by mail-iy0-f173.google.com with SMTP id 39so4186308iyb.4 for ; Thu, 28 Jul 2011 21:50:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=bGxukd9PWsEDR1wzexAiWN9ykM7vGcK8kEEux0CiFAQ=; b=SFBWx2Kr9GpBAYMEGMYIiXeIwQY7NIye+zpTavBaCH371+NWy43KOFOrC9Pu5/jNib RTDndwJnG17GU6NvSuqGWIVTOjDtfG8BKW9Q6/0gfnOI96zKjupdDhq14crjuqa2iUn2 u/UYwkNsfgND0pghNxesmSEWWhF78BRq9Jgmw= Received: by 10.231.23.193 with SMTP id s1mr563961ibb.81.1311915024980; Thu, 28 Jul 2011 21:50:24 -0700 (PDT) Received: from localhost.localdomain (d72-39-252-38.home1.cgocable.net [72.39.252.38]) by mx.google.com with ESMTPS id v16sm1109424ibf.25.2011.07.28.21.50.23 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 28 Jul 2011 21:50:24 -0700 (PDT) From: Devin Nakamura To: qemu-devel@nongnu.org Date: Fri, 29 Jul 2011 00:49:38 -0400 Message-Id: <1311914994-20482-9-git-send-email-devin122@gmail.com> X-Mailer: git-send-email 1.7.6.rc1 In-Reply-To: <1311914994-20482-1-git-send-email-devin122@gmail.com> References: <1311914994-20482-1-git-send-email-devin122@gmail.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 209.85.210.173 Cc: kwolf@redhat.com, Devin Nakamura Subject: [Qemu-devel] [RFC 08/24] qed: add qed_find_cluster_sync() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Devin Nakamura --- block/qed-cluster.c | 35 +++++++++++++++++++++++++++++++++++ block/qed.h | 4 ++++ 2 files changed, 39 insertions(+), 0 deletions(-) diff --git a/block/qed-cluster.c b/block/qed-cluster.c index 3e19ad1..063b965 100644 --- a/block/qed-cluster.c +++ b/block/qed-cluster.c @@ -163,3 +163,38 @@ void qed_find_cluster(BDRVQEDState *s, QEDRequest *request, uint64_t pos, qed_read_l2_table(s, request, l2_offset, qed_find_cluster_cb, find_cluster_cb); } + +typedef struct { + int ret; + uint64_t *offset; + size_t *len; +} QEDFindClusterSyncCB; + +static void qed_find_cluster_sync_cb(void *opaque, int ret, uint64_t offset, + size_t len) +{ + QEDFindClusterSyncCB *find_cluster_sync_cb = opaque; + *find_cluster_sync_cb->offset = offset; + *find_cluster_sync_cb->len = len; + find_cluster_sync_cb->ret = ret; +} + +int qed_find_cluster_sync(BDRVQEDState *s, QEDRequest *request, uint64_t pos, + size_t len, uint64_t *offset, + size_t *contiguous_bytes) +{ + QEDFindClusterSyncCB find_cluster_cb; + find_cluster_cb.ret = -EINPROGRESS; + find_cluster_cb.offset = offset; + find_cluster_cb.len = contiguous_bytes; + + async_context_push(); + qed_find_cluster(s, request, pos, len, &qed_find_cluster_sync_cb, + &find_cluster_cb); + while (find_cluster_cb.ret == -EINPROGRESS) { + qemu_aio_wait(); + } + async_context_pop(); + + return find_cluster_cb.ret; +} diff --git a/block/qed.h b/block/qed.h index 388fdb3..c899c15 100644 --- a/block/qed.h +++ b/block/qed.h @@ -239,6 +239,10 @@ int qed_write_l2_table_sync(BDRVQEDState *s, QEDRequest *request, void qed_find_cluster(BDRVQEDState *s, QEDRequest *request, uint64_t pos, size_t len, QEDFindClusterFunc *cb, void *opaque); +int qed_find_cluster_sync(BDRVQEDState *s, QEDRequest *request, uint64_t pos, + size_t len, uint64_t *offset, + size_t *contiguous_bytes); + /** * Consistency check */