From patchwork Thu Apr 28 13:16:45 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 8970721 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 258919F46D for ; Thu, 28 Apr 2016 13:30:07 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 721D8202EC for ; Thu, 28 Apr 2016 13:30:06 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C0D2E200E5 for ; Thu, 28 Apr 2016 13:30:00 +0000 (UTC) Received: from localhost ([::1]:49159 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avm12-0007rx-07 for patchwork-qemu-devel@patchwork.kernel.org; Thu, 28 Apr 2016 09:30:00 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38086) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avlp2-0000fi-JC for qemu-devel@nongnu.org; Thu, 28 Apr 2016 09:17:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1avlow-0005qf-Bi for qemu-devel@nongnu.org; Thu, 28 Apr 2016 09:17:36 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39165) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avloq-0005mo-Ox; Thu, 28 Apr 2016 09:17:25 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 737E37F0B3; Thu, 28 Apr 2016 13:17:24 +0000 (UTC) Received: from noname.redhat.com (ovpn-116-93.ams2.redhat.com [10.36.116.93]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u3SDGnDD001230; Thu, 28 Apr 2016 09:17:22 -0400 From: Kevin Wolf To: qemu-block@nongnu.org Date: Thu, 28 Apr 2016 15:16:45 +0200 Message-Id: <1461849406-29743-17-git-send-email-kwolf@redhat.com> In-Reply-To: <1461849406-29743-1-git-send-email-kwolf@redhat.com> References: <1461849406-29743-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 16/17] vvfat: Implement .bdrv_co_preadv/pwritev interfaces 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, famz@redhat.com, sw@weilnetz.de, qemu-devel@nongnu.org, mreitz@redhat.com, stefanha@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This doesn't really convert any of the actual vvfat logic to use vectored I/O (and it's doubtful whether that would make sense), but instead just adapts the wrappers to the modern interface. Signed-off-by: Kevin Wolf --- block/vvfat.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 46 insertions(+), 9 deletions(-) diff --git a/block/vvfat.c b/block/vvfat.c index 183fc4f..5b0c8dd 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -1179,6 +1179,7 @@ static int vvfat_open(BlockDriverState *bs, QDict *options, int flags, bs->read_only = 0; } + bs->request_alignment = BDRV_SECTOR_SIZE; /* No sub-sector I/O supported */ bs->total_sectors = cyls * heads * secs; if (init_directories(s, dirname, heads, secs, errp)) { @@ -1421,14 +1422,31 @@ DLOG(fprintf(stderr, "sector %d not allocated\n", (int)sector_num)); return 0; } -static coroutine_fn int vvfat_co_read(BlockDriverState *bs, int64_t sector_num, - uint8_t *buf, int nb_sectors) +static int coroutine_fn +vvfat_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes, + QEMUIOVector *qiov, int flags) { int ret; BDRVVVFATState *s = bs->opaque; + uint64_t sector_num = offset >> BDRV_SECTOR_BITS; + int nb_sectors = bytes >> BDRV_SECTOR_BITS; + void *buf; + + assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0); + assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0); + + buf = g_try_malloc(bytes); + if (bytes && buf == NULL) { + return -ENOMEM; + } + qemu_co_mutex_lock(&s->lock); ret = vvfat_read(bs, sector_num, buf, nb_sectors); qemu_co_mutex_unlock(&s->lock); + + qemu_iovec_from_buf(qiov, 0, buf, bytes); + g_free(buf); + return ret; } @@ -2880,14 +2898,31 @@ DLOG(checkpoint()); return 0; } -static coroutine_fn int vvfat_co_write(BlockDriverState *bs, int64_t sector_num, - const uint8_t *buf, int nb_sectors) +static int coroutine_fn +vvfat_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, + QEMUIOVector *qiov, int flags) { int ret; BDRVVVFATState *s = bs->opaque; + uint64_t sector_num = offset >> BDRV_SECTOR_BITS; + int nb_sectors = bytes >> BDRV_SECTOR_BITS; + void *buf; + + assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0); + assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0); + + buf = g_try_malloc(bytes); + if (bytes && buf == NULL) { + return -ENOMEM; + } + qemu_iovec_to_buf(qiov, 0, buf, bytes); + qemu_co_mutex_lock(&s->lock); ret = vvfat_write(bs, sector_num, buf, nb_sectors); qemu_co_mutex_unlock(&s->lock); + + g_free(buf); + return ret; } @@ -2904,8 +2939,10 @@ static int64_t coroutine_fn vvfat_co_get_block_status(BlockDriverState *bs, return BDRV_BLOCK_DATA; } -static int write_target_commit(BlockDriverState *bs, int64_t sector_num, - const uint8_t* buffer, int nb_sectors) { +static int coroutine_fn +write_target_commit(BlockDriverState *bs, uint64_t offset, uint64_t bytes, + QEMUIOVector *qiov, int flags) +{ BDRVVVFATState* s = *((BDRVVVFATState**) bs->opaque); return try_commit(s); } @@ -2918,7 +2955,7 @@ static void write_target_close(BlockDriverState *bs) { static BlockDriver vvfat_write_target = { .format_name = "vvfat_write_target", - .bdrv_write = write_target_commit, + .bdrv_co_pwritev = write_target_commit, .bdrv_close = write_target_close, }; @@ -3014,8 +3051,8 @@ static BlockDriver bdrv_vvfat = { .bdrv_file_open = vvfat_open, .bdrv_close = vvfat_close, - .bdrv_read = vvfat_co_read, - .bdrv_write = vvfat_co_write, + .bdrv_co_preadv = vvfat_co_preadv, + .bdrv_co_pwritev = vvfat_co_pwritev, .bdrv_co_get_block_status = vvfat_co_get_block_status, };