From patchwork Fri Jun 16 17:36:56 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 776892 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wq78F6W0sz9sDF for ; Sat, 17 Jun 2017 03:46:05 +1000 (AEST) Received: from localhost ([::1]:60120 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dLvJr-0004uo-GS for incoming@patchwork.ozlabs.org; Fri, 16 Jun 2017 13:46:03 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52933) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dLvC8-000613-1G for qemu-devel@nongnu.org; Fri, 16 Jun 2017 13:38:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dLvC7-0001Uv-2b for qemu-devel@nongnu.org; Fri, 16 Jun 2017 13:38:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53052) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dLvC4-0001SE-CE; Fri, 16 Jun 2017 13:38:00 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 556F66264B; Fri, 16 Jun 2017 17:37:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 556F66264B Authentication-Results: ext-mx10.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx10.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=kwolf@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 556F66264B Received: from noname.redhat.com (ovpn-116-50.ams2.redhat.com [10.36.116.50]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4D53286D28; Fri, 16 Jun 2017 17:37:57 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Date: Fri, 16 Jun 2017 19:36:56 +0200 Message-Id: <1497634636-20230-12-git-send-email-kwolf@redhat.com> In-Reply-To: <1497634636-20230-1-git-send-email-kwolf@redhat.com> References: <1497634636-20230-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Fri, 16 Jun 2017 17:37:59 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 11/31] qed: Make qed_write_table() synchronous X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, pbonzini@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Note that this code is generally not running in coroutine context, so this is an actual blocking synchronous operation. We'll fix this in a moment. Signed-off-by: Kevin Wolf Reviewed-by: Stefan Hajnoczi --- block/qed-table.c | 84 ++++++++++++++++++++----------------------------------- 1 file changed, 30 insertions(+), 54 deletions(-) diff --git a/block/qed-table.c b/block/qed-table.c index ffecbea..0cc93a7 100644 --- a/block/qed-table.c +++ b/block/qed-table.c @@ -52,46 +52,6 @@ out: return ret; } -typedef struct { - GenericCB gencb; - BDRVQEDState *s; - QEDTable *orig_table; - QEDTable *table; - bool flush; /* flush after write? */ - - struct iovec iov; - QEMUIOVector qiov; -} QEDWriteTableCB; - -static void qed_write_table_cb(void *opaque, int ret) -{ - QEDWriteTableCB *write_table_cb = opaque; - BDRVQEDState *s = write_table_cb->s; - - trace_qed_write_table_cb(s, - write_table_cb->orig_table, - write_table_cb->flush, - ret); - - if (ret) { - goto out; - } - - if (write_table_cb->flush) { - /* We still need to flush first */ - write_table_cb->flush = false; - qed_acquire(s); - bdrv_aio_flush(write_table_cb->s->bs, qed_write_table_cb, - write_table_cb); - qed_release(s); - return; - } - -out: - qemu_vfree(write_table_cb->table); - gencb_complete(&write_table_cb->gencb, ret); -} - /** * Write out an updated part or all of a table * @@ -108,10 +68,13 @@ static void qed_write_table(BDRVQEDState *s, uint64_t offset, QEDTable *table, unsigned int index, unsigned int n, bool flush, BlockCompletionFunc *cb, void *opaque) { - QEDWriteTableCB *write_table_cb; unsigned int sector_mask = BDRV_SECTOR_SIZE / sizeof(uint64_t) - 1; unsigned int start, end, i; + QEDTable *new_table; + struct iovec iov; + QEMUIOVector qiov; size_t len_bytes; + int ret; trace_qed_write_table(s, offset, table, index, n); @@ -121,28 +84,41 @@ static void qed_write_table(BDRVQEDState *s, uint64_t offset, QEDTable *table, len_bytes = (end - start) * sizeof(uint64_t); - write_table_cb = gencb_alloc(sizeof(*write_table_cb), cb, opaque); - write_table_cb->s = s; - write_table_cb->orig_table = table; - write_table_cb->flush = flush; - write_table_cb->table = qemu_blockalign(s->bs, len_bytes); - write_table_cb->iov.iov_base = write_table_cb->table->offsets; - write_table_cb->iov.iov_len = len_bytes; - qemu_iovec_init_external(&write_table_cb->qiov, &write_table_cb->iov, 1); + new_table = qemu_blockalign(s->bs, len_bytes); + iov = (struct iovec) { + .iov_base = new_table->offsets, + .iov_len = len_bytes, + }; + qemu_iovec_init_external(&qiov, &iov, 1); /* Byteswap table */ for (i = start; i < end; i++) { uint64_t le_offset = cpu_to_le64(table->offsets[i]); - write_table_cb->table->offsets[i - start] = le_offset; + new_table->offsets[i - start] = le_offset; } /* Adjust for offset into table */ offset += start * sizeof(uint64_t); - bdrv_aio_writev(s->bs->file, offset / BDRV_SECTOR_SIZE, - &write_table_cb->qiov, - write_table_cb->qiov.size / BDRV_SECTOR_SIZE, - qed_write_table_cb, write_table_cb); + ret = bdrv_pwritev(s->bs->file, offset, &qiov); + trace_qed_write_table_cb(s, table, flush, ret); + if (ret < 0) { + goto out; + } + + if (flush) { + qed_acquire(s); + ret = bdrv_flush(s->bs); + qed_release(s); + if (ret < 0) { + goto out; + } + } + + ret = 0; +out: + qemu_vfree(new_table); + cb(opaque, ret); } /**