From patchwork Wed Apr 18 03:04:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 899847 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com 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 40Qn7r4Tm5z9s19 for ; Wed, 18 Apr 2018 13:06:16 +1000 (AEST) Received: from localhost ([::1]:52692 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f8dQE-0002Yg-NJ for incoming@patchwork.ozlabs.org; Tue, 17 Apr 2018 23:06:14 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45179) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f8dPH-0002RC-4O for qemu-devel@nongnu.org; Tue, 17 Apr 2018 23:05:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f8dPF-0002X5-S4 for qemu-devel@nongnu.org; Tue, 17 Apr 2018 23:05:15 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:35572 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1f8dPA-0002Tr-N0; Tue, 17 Apr 2018 23:05:08 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4EFFC4023113; Wed, 18 Apr 2018 03:05:08 +0000 (UTC) Received: from lemon.usersys.redhat.com (ovpn-12-78.pek2.redhat.com [10.72.12.78]) by smtp.corp.redhat.com (Postfix) with ESMTP id 244202023227; Wed, 18 Apr 2018 03:05:03 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Wed, 18 Apr 2018 11:04:21 +0800 Message-Id: <20180418030424.28980-5-famz@redhat.com> In-Reply-To: <20180418030424.28980-1-famz@redhat.com> References: <20180418030424.28980-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Wed, 18 Apr 2018 03:05:08 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Wed, 18 Apr 2018 03:05:08 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'famz@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [RFC PATCH v2 4/7] file-posix: Implement bdrv_co_copy_range 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: Kevin Wolf , Fam Zheng , Stefan Hajnoczi , qemu-block@nongnu.org, Peter Lieven , Max Reitz , Ronnie Sahlberg , Paolo Bonzini Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" With copy_file_range(2), we can implement the bdrv_co_copy_range semantics. Signed-off-by: Fam Zheng --- block/file-posix.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++-- include/block/raw-aio.h | 10 ++++- 2 files changed, 104 insertions(+), 5 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index 3794c0007a..45ad543481 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -100,6 +100,7 @@ #ifdef CONFIG_XFS #include #endif +#include //#define DEBUG_BLOCK @@ -185,6 +186,8 @@ typedef struct RawPosixAIOData { #define aio_ioctl_cmd aio_nbytes /* for QEMU_AIO_IOCTL */ off_t aio_offset; int aio_type; + int fd2; + off_t offset2; } RawPosixAIOData; #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) @@ -1421,6 +1424,48 @@ static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb) return -ENOTSUP; } +#ifdef __NR_copy_file_range +#define HAS_COPY_FILE_RANGE +#endif + +#ifdef HAS_COPY_FILE_RANGE +static off_t copy_file_range(int in_fd, off_t *in_off, int out_fd, + off_t *out_off, size_t len, unsigned int flags) +{ + return syscall(__NR_copy_file_range, in_fd, in_off, out_fd, + out_off, len, flags); +} +#endif + +static ssize_t handle_aiocb_copy_range(RawPosixAIOData *aiocb) +{ +#ifndef HAS_COPY_FILE_RANGE + return -ENOTSUP; +#else + uint64_t bytes = aiocb->aio_nbytes; + off_t in_off = aiocb->aio_offset; + off_t out_off = aiocb->offset2; + + while (bytes) { + ssize_t ret = copy_file_range(aiocb->aio_fildes, &in_off, + aiocb->fd2, &out_off, + bytes, 0); + if (ret == -EINTR) { + continue; + } + if (ret < 0) { + return -errno; + } + if (!ret) { + /* No progress (e.g. when beyond EOF), fall back to buffer I/O. */ + return -ENOTSUP; + } + bytes -= ret; + } + return 0; +#endif +} + static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb) { int ret = -EOPNOTSUPP; @@ -1501,6 +1546,9 @@ static int aio_worker(void *arg) case QEMU_AIO_WRITE_ZEROES: ret = handle_aiocb_write_zeroes(aiocb); break; + case QEMU_AIO_COPY_RANGE: + ret = handle_aiocb_copy_range(aiocb); + break; default: fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type); ret = -EINVAL; @@ -1511,9 +1559,10 @@ static int aio_worker(void *arg) return ret; } -static int paio_submit_co(BlockDriverState *bs, int fd, - int64_t offset, QEMUIOVector *qiov, - int bytes, int type) +static int paio_submit_co_full(BlockDriverState *bs, int fd, + int64_t offset, int fd2, int64_t offset2, + QEMUIOVector *qiov, + int bytes, int type) { RawPosixAIOData *acb = g_new(RawPosixAIOData, 1); ThreadPool *pool; @@ -1521,6 +1570,8 @@ static int paio_submit_co(BlockDriverState *bs, int fd, acb->bs = bs; acb->aio_type = type; acb->aio_fildes = fd; + acb->fd2 = fd2; + acb->offset2 = offset2; acb->aio_nbytes = bytes; acb->aio_offset = offset; @@ -1536,6 +1587,13 @@ static int paio_submit_co(BlockDriverState *bs, int fd, return thread_pool_submit_co(pool, aio_worker, acb); } +static inline int paio_submit_co(BlockDriverState *bs, int fd, + int64_t offset, QEMUIOVector *qiov, + int bytes, int type) +{ + return paio_submit_co_full(bs, fd, offset, -1, 0, qiov, bytes, type); +} + static BlockAIOCB *paio_submit(BlockDriverState *bs, int fd, int64_t offset, QEMUIOVector *qiov, int bytes, BlockCompletionFunc *cb, void *opaque, int type) @@ -2312,6 +2370,35 @@ static void raw_abort_perm_update(BlockDriverState *bs) raw_handle_perm_lock(bs, RAW_PL_ABORT, 0, 0, NULL); } +static int coroutine_fn raw_co_copy_range_from(BlockDriverState *bs, + BdrvChild *src, uint64_t src_offset, + BdrvChild *dst, uint64_t dst_offset, + uint64_t bytes, BdrvRequestFlags flags) +{ + return bdrv_co_copy_range_to(src, src_offset, dst, dst_offset, bytes, flags); +} + +static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs, + BdrvChild *src, uint64_t src_offset, + BdrvChild *dst, uint64_t dst_offset, + uint64_t bytes, BdrvRequestFlags flags) +{ + BDRVRawState *s = bs->opaque; + BDRVRawState *src_s; + + assert(dst->bs == bs); + if (src->bs->drv->bdrv_co_copy_range_to != raw_co_copy_range_to) { + return -ENOTSUP; + } + + src_s = src->opaque; + if (fd_open(bs) < 0 || fd_open(bs) < 0) { + return -EIO; + } + return paio_submit_co_full(bs, src_s->fd, src_offset, s->fd, dst_offset, + NULL, bytes, QEMU_AIO_COPY_RANGE); +} + BlockDriver bdrv_file = { .format_name = "file", .protocol_name = "file", @@ -2334,6 +2421,8 @@ BlockDriver bdrv_file = { .bdrv_co_pwritev = raw_co_pwritev, .bdrv_aio_flush = raw_aio_flush, .bdrv_aio_pdiscard = raw_aio_pdiscard, + .bdrv_co_copy_range_from = raw_co_copy_range_from, + .bdrv_co_copy_range_to = raw_co_copy_range_to, .bdrv_refresh_limits = raw_refresh_limits, .bdrv_io_plug = raw_aio_plug, .bdrv_io_unplug = raw_aio_unplug, @@ -2811,6 +2900,10 @@ static BlockDriver bdrv_host_device = { .bdrv_co_pwritev = raw_co_pwritev, .bdrv_aio_flush = raw_aio_flush, .bdrv_aio_pdiscard = hdev_aio_pdiscard, + .bdrv_co_copy_range_from = raw_co_copy_range_from, + .bdrv_co_copy_range_to = raw_co_copy_range_to, + .bdrv_co_copy_range_from = raw_co_copy_range_from, + .bdrv_co_copy_range_to = raw_co_copy_range_to, .bdrv_refresh_limits = raw_refresh_limits, .bdrv_io_plug = raw_aio_plug, .bdrv_io_unplug = raw_aio_unplug, diff --git a/include/block/raw-aio.h b/include/block/raw-aio.h index a4cdbbf1b7..324053020b 100644 --- a/include/block/raw-aio.h +++ b/include/block/raw-aio.h @@ -25,9 +25,15 @@ #define QEMU_AIO_FLUSH 0x0008 #define QEMU_AIO_DISCARD 0x0010 #define QEMU_AIO_WRITE_ZEROES 0x0020 +#define QEMU_AIO_COPY_RANGE 0x0040 #define QEMU_AIO_TYPE_MASK \ - (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH| \ - QEMU_AIO_DISCARD|QEMU_AIO_WRITE_ZEROES) + (QEMU_AIO_READ | \ + QEMU_AIO_WRITE | \ + QEMU_AIO_IOCTL | \ + QEMU_AIO_FLUSH | \ + QEMU_AIO_DISCARD | \ + QEMU_AIO_WRITE_ZEROES | \ + QEMU_AIO_COPY_RANGE) /* AIO flags */ #define QEMU_AIO_MISALIGNED 0x1000