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X-Received-From: 2607:f8b0:4864:20::52f Subject: [Qemu-devel] [RFC PATCH v2 1/9] qapi/block-core: add option for io_uring 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 , qemu-block@nongnu.org, saket.sinha89@gmail.com, Stefan Hajnoczi , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Aarushi Mehta --- qapi/block-core.json | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) -- 2.17.1 diff --git a/qapi/block-core.json b/qapi/block-core.json index 7ccbfff9d0..0e927b247d 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -2776,11 +2776,13 @@ # # @threads: Use qemu's thread pool # @native: Use native AIO backend (only Linux and Windows) +# @io_uring: Use linux io_uring (only Linux) # -# Since: 2.9 +# Since: 4.1 ## { 'enum': 'BlockdevAioOptions', - 'data': [ 'threads', 'native' ] } + 'data': [ 'threads', 'native', + { 'name': 'io_uring', 'if': 'defined(CONFIG_LINUX)' } ] } ## # @BlockdevCacheOptions: From patchwork Fri May 24 14:03:30 2019 Content-Type: text/plain; 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X-Received-From: 2607:f8b0:4864:20::443 Subject: [Qemu-devel] [RFC PATCH v2 2/9] block/block: add BDRV flag for io_uring 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 , qemu-block@nongnu.org, saket.sinha89@gmail.com, Stefan Hajnoczi , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Aarushi Mehta Reviewed-by: Stefan Hajnoczi --- include/block/block.h | 1 + 1 file changed, 1 insertion(+) -- 2.17.1 diff --git a/include/block/block.h b/include/block/block.h index 9b083e2bca..60f7c6c01c 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -121,6 +121,7 @@ typedef struct HDGeometry { ignoring the format layer */ #define BDRV_O_NO_IO 0x10000 /* don't initialize for I/O */ #define BDRV_O_AUTO_RDONLY 0x20000 /* degrade to read-only if opening read-write fails */ +#define BDRV_O_IO_URING 0x40000 /* use io_uring instead of the thread pool */ #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_NO_FLUSH) From patchwork Fri May 24 14:03:31 2019 Content-Type: text/plain; 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X-Received-From: 2607:f8b0:4864:20::543 Subject: [Qemu-devel] [RFC PATCH v2 3/9] include/block: declare interfaces for io_uring 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 , qemu-block@nongnu.org, saket.sinha89@gmail.com, Stefan Hajnoczi , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Aarushi Mehta --- include/block/aio.h | 16 +++++++++++++++- include/block/raw-aio.h | 15 +++++++++++++++ 2 files changed, 30 insertions(+), 1 deletion(-) -- 2.17.1 diff --git a/include/block/aio.h b/include/block/aio.h index 0ca25dfec6..9da3fd9793 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -50,6 +50,7 @@ typedef void IOHandler(void *opaque); struct Coroutine; struct ThreadPool; struct LinuxAioState; +struct LuringState; struct AioContext { GSource source; @@ -118,11 +119,19 @@ struct AioContext { struct ThreadPool *thread_pool; #ifdef CONFIG_LINUX_AIO - /* State for native Linux AIO. Uses aio_context_acquire/release for + /* + * State for native Linux AIO. Uses aio_context_acquire/release for * locking. */ struct LinuxAioState *linux_aio; #endif +#ifdef CONFIG_LINUX_IO_URING + /* + * State for Linux io_uring. Uses aio_context_acquire/release for + * locking. + */ + struct LuringState *linux_io_uring; +#endif /* TimerLists for calling timers - one per clock type. Has its own * locking. @@ -387,6 +396,11 @@ struct LinuxAioState *aio_setup_linux_aio(AioContext *ctx, Error **errp); /* Return the LinuxAioState bound to this AioContext */ struct LinuxAioState *aio_get_linux_aio(AioContext *ctx); +/* Setup the LuringState bound to this AioContext */ +struct LuringState *aio_setup_linux_io_uring(AioContext *ctx, Error **errp); + +/* Return the LuringState bound to this AioContext */ +struct LuringState *aio_get_linux_io_uring(AioContext *ctx); /** * aio_timer_new_with_attrs: * @ctx: the aio context diff --git a/include/block/raw-aio.h b/include/block/raw-aio.h index ba223dd1f1..28a836151e 100644 --- a/include/block/raw-aio.h +++ b/include/block/raw-aio.h @@ -58,6 +58,21 @@ void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context); void laio_io_plug(BlockDriverState *bs, LinuxAioState *s); void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s); #endif +/* io_uring.c - Linux io_uring implementation */ +#ifdef CONFIG_LINUX_IO_URING +typedef struct LuringState LuringState; +LuringState *luring_init(Error **errp); +void luring_cleanup(LuringState *s); +int coroutine_fn luring_co_submit(BlockDriverState *bs, LuringState *s, int fd, + uint64_t offset, QEMUIOVector *qiov, int type); +BlockAIOCB *luring_submit(BlockDriverState *bs, LuringState *s, int fd, + int64_t sector_num, QEMUIOVector *qiov, BlockCompletionFunc *cb, + void *opaque, int type); +void luring_detach_aio_context(LuringState *s, AioContext *old_context); +void luring_attach_aio_context(LuringState *s, AioContext *new_context); +void luring_io_plug(BlockDriverState *bs, LuringState *s); +void luring_io_unplug(BlockDriverState *bs, LuringState *s); +#endif #ifdef _WIN32 typedef struct QEMUWin32AIOState QEMUWin32AIOState; From patchwork Fri May 24 14:03:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aarushi Mehta X-Patchwork-Id: 10959973 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 21FF676 for ; 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Fri, 24 May 2019 07:04:13 -0700 (PDT) From: Aarushi Mehta To: qemu-devel@nongnu.org Date: Fri, 24 May 2019 19:33:32 +0530 Message-Id: <20190524140337.13415-5-mehta.aaru20@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190524140337.13415-1-mehta.aaru20@gmail.com> References: <20190524140337.13415-1-mehta.aaru20@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::443 Subject: [Qemu-devel] [RFC PATCH v2 4/9] stubs: add aio interface stubs for io_uring 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 , qemu-block@nongnu.org, saket.sinha89@gmail.com, Stefan Hajnoczi , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Aarushi Mehta --- MAINTAINERS | 10 ++++++++++ stubs/Makefile.objs | 1 + stubs/io_uring.c | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 43 insertions(+) create mode 100644 stubs/io_uring.c -- 2.17.1 diff --git a/MAINTAINERS b/MAINTAINERS index 3cacd751bf..b8fc1e3fe3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2504,6 +2504,16 @@ F: block/file-posix.c F: block/file-win32.c F: block/win32-aio.c +Linux io_uring +M: Aarushi Mehta +R: Stefan Hajnoczi +L: qemu-block@nongnu.org +S: Maintained +F: stubs/io_uring.c + + +L: qemu-block@nongnu.original + qcow2 M: Kevin Wolf M: Max Reitz diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs index 73452ad265..ea158cf0ee 100644 --- a/stubs/Makefile.objs +++ b/stubs/Makefile.objs @@ -13,6 +13,7 @@ stub-obj-y += iothread.o stub-obj-y += iothread-lock.o stub-obj-y += is-daemonized.o stub-obj-$(CONFIG_LINUX_AIO) += linux-aio.o +stub-obj-$(CONFIG_LINUX_IO_URING) += io_uring.o stub-obj-y += machine-init-done.o stub-obj-y += migr-blocker.o stub-obj-y += change-state-handler.o diff --git a/stubs/io_uring.c b/stubs/io_uring.c new file mode 100644 index 0000000000..622d1e4648 --- /dev/null +++ b/stubs/io_uring.c @@ -0,0 +1,32 @@ +/* + * Linux io_uring support. + * + * Copyright (C) 2009 IBM, Corp. + * Copyright (C) 2009 Red Hat, Inc. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ +#include "qemu/osdep.h" +#include "block/aio.h" +#include "block/raw-aio.h" + +void luring_detach_aio_context(LuringState *s, AioContext *old_context) +{ + abort(); +} + +void luring_attach_aio_context(LuringState *s, AioContext *new_context) +{ + abort(); +} + +LuringState *luring_init(Error **errp) +{ + abort(); +} + +void luring_cleanup(LuringState *s) +{ + abort(); +} From patchwork Fri May 24 14:03:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aarushi Mehta X-Patchwork-Id: 10959971 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 713F476 for ; Fri, 24 May 2019 14:12:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5FF3628897 for ; Fri, 24 May 2019 14:12:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 53F62288A7; Fri, 24 May 2019 14:12:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E3E29288A6 for ; 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X-Received-From: 2607:f8b0:4864:20::444 Subject: [Qemu-devel] [RFC PATCH v2 5/9] util/async: add aio interfaces for io_uring 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 , qemu-block@nongnu.org, saket.sinha89@gmail.com, Stefan Hajnoczi , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Aarushi Mehta Reviewed-by: Stefan Hajnoczi --- util/async.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) -- 2.17.1 diff --git a/util/async.c b/util/async.c index c10642a385..2709f0edc3 100644 --- a/util/async.c +++ b/util/async.c @@ -277,6 +277,14 @@ aio_ctx_finalize(GSource *source) } #endif +#ifdef CONFIG_LINUX_IO_URING + if (ctx->linux_io_uring) { + luring_detach_aio_context(ctx->linux_io_uring, ctx); + luring_cleanup(ctx->linux_io_uring); + ctx->linux_io_uring = NULL; + } +#endif + assert(QSLIST_EMPTY(&ctx->scheduled_coroutines)); qemu_bh_delete(ctx->co_schedule_bh); @@ -341,6 +349,29 @@ LinuxAioState *aio_get_linux_aio(AioContext *ctx) } #endif +#ifdef CONFIG_LINUX_IO_URING +LuringState *aio_setup_linux_io_uring(AioContext *ctx, Error **errp) +{ + if (ctx->linux_io_uring) { + return ctx->linux_io_uring; + } + + ctx->linux_io_uring = luring_init(errp); + if (!ctx->linux_io_uring) { + return NULL; + } + + luring_attach_aio_context(ctx->linux_io_uring, ctx); + return ctx->linux_io_uring; +} + +LuringState *aio_get_linux_io_uring(AioContext *ctx) +{ + assert(ctx->linux_io_uring); + return ctx->linux_io_uring; +} +#endif + void aio_notify(AioContext *ctx) { /* Write e.g. bh->scheduled before reading ctx->notify_me. Pairs @@ -432,6 +463,11 @@ AioContext *aio_context_new(Error **errp) #ifdef CONFIG_LINUX_AIO ctx->linux_aio = NULL; #endif + +#ifdef CONFIG_LINUX_IO_URING + ctx->linux_io_uring = NULL; +#endif + ctx->thread_pool = NULL; qemu_rec_mutex_init(&ctx->lock); timerlistgroup_init(&ctx->tlg, aio_timerlist_notify, ctx); From patchwork Fri May 24 14:03:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aarushi Mehta X-Patchwork-Id: 10959953 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BB5E66C5 for ; Fri, 24 May 2019 14:06:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AA312287E3 for ; Fri, 24 May 2019 14:06:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9E83C2893D; Fri, 24 May 2019 14:06:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D596B286BC for ; Fri, 24 May 2019 14:06:04 +0000 (UTC) Received: from localhost ([127.0.0.1]:55145 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hUApd-0004Vf-My for patchwork-qemu-devel@patchwork.kernel.org; Fri, 24 May 2019 10:06:01 -0400 Received: from eggs.gnu.org ([209.51.188.92]:40377) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hUAo6-0003K3-8M for qemu-devel@nongnu.org; Fri, 24 May 2019 10:04:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hUAo4-0002f2-Lv for qemu-devel@nongnu.org; Fri, 24 May 2019 10:04:26 -0400 Received: from mail-pg1-x544.google.com ([2607:f8b0:4864:20::544]:40352) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hUAo4-0002eW-E1; Fri, 24 May 2019 10:04:24 -0400 Received: by mail-pg1-x544.google.com with SMTP id d30so5127519pgm.7; Fri, 24 May 2019 07:04:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=HHUEovWF7EXR7rQLHGWiE3cCOALQt2MWSiGE0Lugumc=; b=hnARXkqDXehZrh41tvfk/VvinNqGoFHEaHO7S9P9BWbveGmrHUX8YlP2d6xwwvxPp8 TqhdbzMQA8ZdDXlR9pwWvR8xlC/74TG2OOnYlJ0QV2Z8ZEoazCTm36XvdWFE6zt9chXy 7nhAbjyCDlQkdz4grnkMS62+3HqqrT8MO8ADoCVKHdBmXppJH/bXTXVP9I8mE52K8gHO 6wWSL724oNpzSZN7FYgZUd/37FF+IdLO+xRiLU0qdZiTZH1S3hcKsx/tgUu2Oe7tfIGr mKRyOXvZSMO3Y5RbzgDIs/sz50LBzsXh/riZE+1zu3xJtOjwrcDBZvRBvLuY+XLcrrES HPqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=HHUEovWF7EXR7rQLHGWiE3cCOALQt2MWSiGE0Lugumc=; b=lxhMIbXy/wnywi2JR1wuEC+jEQYb0pGJyXLn0PlDKDiYytUKJ/m93n7ULRiVJ9B3jR 8eMStQdYm91aRI4FbNslqIvdOoXh3CRcAPkXv4gsYG7+B1AHTdPphpF3Tc3KLr8SbL8F 9q9av74ruy36xywRhypLziTjJhe/zFQqtBjdcwl7KCz4SisPfkPwwtp99sURMJHQH9/R Tg0/NRLD+rnk3ovaPA+xjdpTW81qQNFNDO2tHPeKF8jDxjV8LYveTvHxKVn36ynvjjKK bs9nOt1/ThAQZLOk7fv619coJiBDRLcuCjEb3Q8byebn+A3WrCVt5XtIFdOXwQi/Xp9e ttyg== X-Gm-Message-State: APjAAAWV/sRTt0RdiDxggmb59ZV3fec208FSYNiZNI4/EAlt6z5J9NpW gdl8Yr48F/WF6UKu7yM3yrjTbXABNGVArA== X-Google-Smtp-Source: APXvYqyXiM6EZJrCb2ZykyUnksHiYEAKLkNKPtqbjWanj+f4XdxTvmsXzsCwtgV6Haj/PCx6GjixEw== X-Received: by 2002:a63:e018:: with SMTP id e24mr22720005pgh.361.1558706662971; Fri, 24 May 2019 07:04:22 -0700 (PDT) Received: from localhost.localdomain ([120.57.120.132]) by smtp.gmail.com with ESMTPSA id u11sm2556766pfh.130.2019.05.24.07.04.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 24 May 2019 07:04:22 -0700 (PDT) From: Aarushi Mehta To: qemu-devel@nongnu.org Date: Fri, 24 May 2019 19:33:34 +0530 Message-Id: <20190524140337.13415-7-mehta.aaru20@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190524140337.13415-1-mehta.aaru20@gmail.com> References: <20190524140337.13415-1-mehta.aaru20@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::544 Subject: [Qemu-devel] [RFC PATCH v2 6/9] block/io_uring: implements interfaces for io_uring 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 , qemu-block@nongnu.org, saket.sinha89@gmail.com, Stefan Hajnoczi , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Aarushi Mehta --- MAINTAINERS | 1 + block/Makefile.objs | 2 + block/io_uring.c | 306 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 309 insertions(+) create mode 100644 block/io_uring.c -- 2.17.1 diff --git a/MAINTAINERS b/MAINTAINERS index b8fc1e3fe3..770d562c6c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2510,6 +2510,7 @@ R: Stefan Hajnoczi L: qemu-block@nongnu.org S: Maintained F: stubs/io_uring.c +F: block/io_uring.c L: qemu-block@nongnu.original diff --git a/block/Makefile.objs b/block/Makefile.objs index 7a81892a52..262d413c6d 100644 --- a/block/Makefile.objs +++ b/block/Makefile.objs @@ -18,6 +18,7 @@ block-obj-y += block-backend.o snapshot.o qapi.o block-obj-$(CONFIG_WIN32) += file-win32.o win32-aio.o block-obj-$(CONFIG_POSIX) += file-posix.o block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o +block-obj-$(CONFIG_LINUX_IO_URING) += io_uring.o block-obj-y += null.o mirror.o commit.o io.o create.o block-obj-y += throttle-groups.o block-obj-$(CONFIG_LINUX) += nvme.o @@ -61,5 +62,6 @@ block-obj-$(if $(CONFIG_LZFSE),m,n) += dmg-lzfse.o dmg-lzfse.o-libs := $(LZFSE_LIBS) qcow.o-libs := -lz linux-aio.o-libs := -laio +io_uring.o-libs := -luring parallels.o-cflags := $(LIBXML2_CFLAGS) parallels.o-libs := $(LIBXML2_LIBS) diff --git a/block/io_uring.c b/block/io_uring.c new file mode 100644 index 0000000000..817ec055db --- /dev/null +++ b/block/io_uring.c @@ -0,0 +1,306 @@ +/* + * Linux io_uring support. + * + * Copyright (C) 2009 IBM, Corp. + * Copyright (C) 2009 Red Hat, Inc. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ +#include + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "block/aio.h" +#include "qemu/queue.h" +#include "block/block.h" +#include "block/raw-aio.h" +#include "qemu/event_notifier.h" +#include "qemu/coroutine.h" +#include "qapi/error.h" + +#define MAX_EVENTS 128 + +typedef struct LuringAIOCB { + BlockAIOCB common; + Coroutine *co; + struct io_uring_sqe sqeq; + int ret; + QSIMPLEQ_ENTRY(LuringAIOCB) next; +} LuringAIOCB; + +typedef struct LuringQueue { + int plugged; + unsigned int in_queue; + unsigned int in_flight; + bool blocked; + QSIMPLEQ_HEAD(, LuringAIOCB) pending; +} LuringQueue; + +typedef struct LuringState { + AioContext *aio_context; + + struct io_uring ring; + + /* io queue for submit at batch. Protected by AioContext lock. */ + LuringQueue io_q; + + /* I/O completion processing. Only runs in I/O thread. */ + QEMUBH *completion_bh; + int event_idx; + int event_max; +} LuringState; + +static void ioq_submit(LuringState *s); + +static inline int io_cqe_ret(struct io_uring_cqe *cqe) +{ + return cqe->res; +} + +/** + * qemu_luring_process_completions: + * @s: AIO state + * + * Fetches completed I/O requests, consumes cqes and invokes their callbacks. + * + */ +static void qemu_luring_process_completions(LuringState *s) +{ + struct io_uring_cqe *cqes; + + qemu_bh_schedule(s->completion_bh); + + while ((s->event_max = s->io_q.in_flight) && + !io_uring_peek_cqe(&s->ring, &cqes)) { + for (s->event_idx = 0; s->event_idx < s->event_max;) { + io_uring_cqe_seen(&s->ring, cqes); + + LuringAIOCB *luringcb; + luringcb = g_malloc0(sizeof(luringcb)); + luringcb->ret = io_cqe_ret(cqes); + /* Change counters one-by-one because we can be nested. */ + s->io_q.in_flight--; + s->event_idx++; + } + } + + qemu_bh_cancel(s->completion_bh); + + /* + *If we are nested we have to notify the level above that we are done + * by setting event_max to zero, upper level will then jump out of it's + * own `for` loop. If we are the last all counters dropped to zero. + */ + s->event_max = 0; + s->event_idx = 0; +} + +static void qemu_luring_process_completions_and_submit(LuringState *s) +{ + aio_context_acquire(s->aio_context); + qemu_luring_process_completions(s); + + if (!s->io_q.plugged && !QSIMPLEQ_EMPTY(&s->io_q.pending)) { + ioq_submit(s); + } + aio_context_release(s->aio_context); +} + +static void qemu_luring_completion_bh(void *opaque) +{ + LuringState *s = opaque; + qemu_luring_process_completions_and_submit(s); +} + +static void qemu_luring_completion_cb(void *opaque) +{ + LuringState *s = opaque; + qemu_luring_process_completions_and_submit(s); +} + +static const AIOCBInfo luring_aiocb_info = { + .aiocb_size = sizeof(LuringAIOCB), +}; + + +static void ioq_init(LuringQueue *io_q) +{ + QSIMPLEQ_INIT(&io_q->pending); + io_q->plugged = 0; + io_q->in_queue = 0; + io_q->in_flight = 0; + io_q->blocked = false; +} + +static void ioq_submit(LuringState *s) +{ + int ret, len; + LuringAIOCB *luringcb; + QSIMPLEQ_HEAD(, LuringAIOCB) completed; + + while (s->io_q.in_flight >= MAX_EVENTS && s->io_q.in_queue) { + len = 0; + QSIMPLEQ_FOREACH(luringcb, &s->io_q.pending, next) { + if (s->io_q.in_flight + len++ >= MAX_EVENTS) { + break; + } + struct io_uring_sqe *sqes = io_uring_get_sqe(&s->ring); + if (sqes) { /* Prep sqe for subission */ + memset(sqes, 0, sizeof(*sqes)); + *sqes = luringcb->sqeq; + QSIMPLEQ_REMOVE_HEAD(&s->io_q.pending, next); + } else { + break; + } + } + + ret = io_uring_submit(&s->ring); + if (ret == -EAGAIN) { + break; + } + + s->io_q.in_flight += ret; + s->io_q.in_queue -= ret; + QSIMPLEQ_SPLIT_AFTER(&s->io_q.pending, luringcb, next, &completed); + } + s->io_q.blocked = (s->io_q.in_queue > 0); + + if (s->io_q.in_flight) { + /* + * We can try to complete something just right away if there are + * still requests in-flight. + */ + qemu_luring_process_completions(s); + } +} + +void luring_io_plug(BlockDriverState *bs, LuringState *s) +{ + s->io_q.plugged++; +} + +void luring_io_unplug(BlockDriverState *bs, LuringState *s) +{ + assert(s->io_q.plugged); + if (--s->io_q.plugged == 0 && + !s->io_q.blocked && !QSIMPLEQ_EMPTY(&s->io_q.pending)) { + ioq_submit(s); + } +} + +static int luring_do_submit(int fd, LuringAIOCB *luringcb, LuringState *s, + uint64_t offset, QEMUIOVector *qiov, int type) +{ + struct io_uring_sqe *sqes = io_uring_get_sqe(&s->ring); + if (!sqes) { + sqes = &luringcb->sqeq; + QSIMPLEQ_INSERT_TAIL(&s->io_q.pending, luringcb, next); + } + + switch (type) { + case QEMU_AIO_WRITE: + io_uring_prep_writev(sqes, fd, qiov->iov, qiov->niov, offset); + break; + case QEMU_AIO_READ: + io_uring_prep_readv(sqes, fd, qiov->iov, qiov->niov, offset); + break; + case QEMU_AIO_FLUSH: + io_uring_prep_fsync(sqes, fd, IORING_FSYNC_DATASYNC); + break; + default: + fprintf(stderr, "%s: invalid AIO request type, aborting 0x%x.\n", + __func__, type); + abort(); + } + + s->io_q.in_queue++; + if (!s->io_q.blocked && + (!s->io_q.plugged || + s->io_q.in_flight + s->io_q.in_queue >= MAX_EVENTS)) { + ioq_submit(s); + } + + return 0; +} + +int coroutine_fn luring_co_submit(BlockDriverState *bs, LuringState *s, int fd, + uint64_t offset, QEMUIOVector *qiov, int type) +{ + int ret; + LuringAIOCB luringcb = { + .co = qemu_coroutine_self(), + .ret = -EINPROGRESS, + }; + + ret = luring_do_submit(fd, &luringcb, s, offset, qiov, type); + if (ret < 0) { + return ret; + } + + if (luringcb.ret == -EINPROGRESS) { + qemu_coroutine_yield(); + } + return luringcb.ret; +} + +BlockAIOCB *luring_submit(BlockDriverState *bs, LuringState *s, int fd, + int64_t sector_num, QEMUIOVector *qiov, BlockCompletionFunc *cb, + void *opaque, int type) +{ + LuringAIOCB *luringcb; + off_t offset = sector_num * BDRV_SECTOR_SIZE; + int ret; + + luringcb = qemu_aio_get(&luring_aiocb_info, bs, cb, opaque); + luringcb->ret = -EINPROGRESS; + ret = luring_do_submit(fd, luringcb, s, offset, qiov, type); + if (ret < 0) { + qemu_aio_unref(luringcb); + return NULL; + } + + return &luringcb->common; +} + +void luring_detach_aio_context(LuringState *s, AioContext *old_context) +{ + aio_set_fd_handler(old_context, s->ring.ring_fd, false, NULL, NULL, NULL, + &s); + qemu_bh_delete(s->completion_bh); + s->aio_context = NULL; +} + +void luring_attach_aio_context(LuringState *s, AioContext *new_context) +{ + s->aio_context = new_context; + s->completion_bh = aio_bh_new(new_context, qemu_luring_completion_bh, s); + aio_set_fd_handler(s->aio_context, s->ring.ring_fd, false, + (IOHandler *)qemu_luring_completion_cb, NULL, NULL, &s); +} + +LuringState *luring_init(Error **errp) +{ + int rc; + LuringState *s; + s = g_malloc0(sizeof(*s)); + struct io_uring *ring = &s->ring; + rc = io_uring_queue_init(MAX_EVENTS, ring, 0); + if (rc == -1) { + error_setg_errno(errp, errno, "failed to init linux io_uring ring"); + goto out_close_efd; + } + + ioq_init(&s->io_q); + return s; + +out_close_efd: + g_free(s); + return NULL; +} + +void luring_cleanup(LuringState *s) +{ + io_uring_queue_exit(&s->ring); + g_free(s); +} From patchwork Fri May 24 14:03:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aarushi Mehta X-Patchwork-Id: 10959965 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AB1AE76 for ; 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Fri, 24 May 2019 07:04:26 -0700 (PDT) From: Aarushi Mehta To: qemu-devel@nongnu.org Date: Fri, 24 May 2019 19:33:35 +0530 Message-Id: <20190524140337.13415-8-mehta.aaru20@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190524140337.13415-1-mehta.aaru20@gmail.com> References: <20190524140337.13415-1-mehta.aaru20@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::444 Subject: [Qemu-devel] [RFC PATCH v2 7/9] blockdev: accept io_uring as option 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 , qemu-block@nongnu.org, saket.sinha89@gmail.com, Stefan Hajnoczi , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Aarushi Mehta Reviewed-by: Stefan Hajnoczi --- blockdev.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 2.17.1 diff --git a/blockdev.c b/blockdev.c index 79fbac8450..b44b9d660d 100644 --- a/blockdev.c +++ b/blockdev.c @@ -386,6 +386,8 @@ static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags, if ((aio = qemu_opt_get(opts, "aio")) != NULL) { if (!strcmp(aio, "native")) { *bdrv_flags |= BDRV_O_NATIVE_AIO; + } else if (!strcmp(aio, "io_uring")) { + *bdrv_flags |= BDRV_O_IO_URING; } else if (!strcmp(aio, "threads")) { /* this is the default */ } else { @@ -4547,7 +4549,7 @@ QemuOptsList qemu_common_drive_opts = { },{ .name = "aio", .type = QEMU_OPT_STRING, - .help = "host AIO implementation (threads, native)", + .help = "host AIO implementation (threads, native, io_uring)", },{ .name = BDRV_OPT_CACHE_WB, .type = QEMU_OPT_BOOL, From patchwork Fri May 24 14:03:36 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aarushi Mehta X-Patchwork-Id: 10959955 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B2DE376 for ; Fri, 24 May 2019 14:06:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A0FBC285DD for ; Fri, 24 May 2019 14:06:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 94E5D286AD; 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X-Received-From: 2607:f8b0:4864:20::643 Subject: [Qemu-devel] [RFC PATCH v2 8/9] block/file-posix: extends to use with io_uring 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 , qemu-block@nongnu.org, saket.sinha89@gmail.com, Stefan Hajnoczi , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Aarushi Mehta --- block/file-posix.c | 63 ++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 58 insertions(+), 5 deletions(-) -- 2.17.1 diff --git a/block/file-posix.c b/block/file-posix.c index d018429672..1f24618cfc 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -154,6 +154,7 @@ typedef struct BDRVRawState { bool has_write_zeroes:1; bool discard_zeroes:1; bool use_linux_aio:1; + bool use_linux_io_uring:1; bool page_cache_inconsistent:1; bool has_fallocate; bool needs_alignment; @@ -423,7 +424,7 @@ static QemuOptsList raw_runtime_opts = { { .name = "aio", .type = QEMU_OPT_STRING, - .help = "host AIO implementation (threads, native)", + .help = "host AIO implementation (threads, native, io_uring)", }, { .name = "locking", @@ -494,6 +495,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options, goto fail; } s->use_linux_aio = (aio == BLOCKDEV_AIO_OPTIONS_NATIVE); + s->use_linux_io_uring = (aio == BLOCKDEV_AIO_OPTIONS_IO_URING); locking = qapi_enum_parse(&OnOffAuto_lookup, qemu_opt_get(opts, "locking"), @@ -557,7 +559,9 @@ static int raw_open_common(BlockDriverState *bs, QDict *options, s->shared_perm = BLK_PERM_ALL; #ifdef CONFIG_LINUX_AIO - /* Currently Linux does AIO only for files opened with O_DIRECT */ + /* + * Currently Linux does AIO only for files opened with O_DIRECT + */ if (s->use_linux_aio) { if (!(s->open_flags & O_DIRECT)) { error_setg(errp, "aio=native was specified, but it requires " @@ -578,6 +582,21 @@ static int raw_open_common(BlockDriverState *bs, QDict *options, goto fail; } #endif /* !defined(CONFIG_LINUX_AIO) */ +#ifdef CONFIG_LINUX_IO_URING + if (s->use_linux_io_uring) { + if (!aio_setup_linux_io_uring(bdrv_get_aio_context(bs), errp)) { + error_prepend(errp, "Unable to use io_uring: "); + goto fail; + } + } +#else + if (s->use_linux_io_uring) { + error_setg(errp, "aio=io_uring was specified, but is not supported " + "in this build."); + ret = -EINVAL; + goto fail; + } +#endif /* !defined(CONFIG_LINUX_IO_URING) */ s->has_discard = true; s->has_write_zeroes = true; @@ -1883,6 +1902,12 @@ static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset, LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); assert(qiov->size == bytes); return laio_co_submit(bs, aio, s->fd, offset, qiov, type); +#endif +#ifdef CONFIG_LINUX_IO_URING + } else if (s->use_linux_io_uring) { + LuringState *aio = aio_get_linux_io_uring(bdrv_get_aio_context(bs)); + assert(qiov->size == bytes); + return luring_co_submit(bs, aio, s->fd, offset, qiov, type); #endif } } @@ -1920,24 +1945,40 @@ static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset, static void raw_aio_plug(BlockDriverState *bs) { -#ifdef CONFIG_LINUX_AIO +#if defined CONFIG_LINUX_AIO || defined CONFIG_LINUX_IO_URING BDRVRawState *s = bs->opaque; +#endif +#ifdef CONFIG_LINUX_AIO if (s->use_linux_aio) { LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); laio_io_plug(bs, aio); } #endif +#ifdef CONFIG_LINUX_IO_URING + if (s->use_linux_io_uring) { + LuringState *aio = aio_get_linux_io_uring(bdrv_get_aio_context(bs)); + luring_io_plug(bs, aio); + } +#endif } static void raw_aio_unplug(BlockDriverState *bs) { -#ifdef CONFIG_LINUX_AIO +#if defined CONFIG_LINUX_AIO || defined CONFIG_LINUX_IO_URING BDRVRawState *s = bs->opaque; +#endif +#ifdef CONFIG_LINUX_AIO if (s->use_linux_aio) { LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); laio_io_unplug(bs, aio); } #endif +#ifdef CONFIG_LINUX_IO_URING + if (s->use_linux_aio) { + LuringState *aio = aio_get_linux_io_uring(bdrv_get_aio_context(bs)); + luring_io_unplug(bs, aio); + } +#endif } static int raw_co_flush_to_disk(BlockDriverState *bs) @@ -1963,8 +2004,10 @@ static int raw_co_flush_to_disk(BlockDriverState *bs) static void raw_aio_attach_aio_context(BlockDriverState *bs, AioContext *new_context) { +#if defined CONFIG_LINUX_AIO || defined CONFIG_LINUX_IO_URING + BDRVRawState *s = bs->opaque; +#endif #ifdef CONFIG_LINUX_AIO - BDRVRawState *s = bs->opaque; if (s->use_linux_aio) { Error *local_err; if (!aio_setup_linux_aio(new_context, &local_err)) { @@ -1974,6 +2017,16 @@ static void raw_aio_attach_aio_context(BlockDriverState *bs, } } #endif +#ifdef CONFIG_LINUX_IO_URING + if (s->use_linux_io_uring) { + Error *local_err; + if (!aio_setup_linux_io_uring(new_context, &local_err)) { + error_reportf_err(local_err, "Unable to use linux io_uring, " + "falling back to thread pool: "); + s->use_linux_io_uring = false; + } + } +#endif } static void raw_close(BlockDriverState *bs) From patchwork Fri May 24 14:03:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aarushi Mehta X-Patchwork-Id: 10959963 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6C55A112C for ; Fri, 24 May 2019 14:07:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5C3862863E for ; 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Fri, 24 May 2019 07:04:35 -0700 (PDT) From: Aarushi Mehta To: qemu-devel@nongnu.org Date: Fri, 24 May 2019 19:33:37 +0530 Message-Id: <20190524140337.13415-10-mehta.aaru20@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190524140337.13415-1-mehta.aaru20@gmail.com> References: <20190524140337.13415-1-mehta.aaru20@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::641 Subject: [Qemu-devel] [RFC PATCH v2 9/9] configure: permit use of io_uring 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 , qemu-block@nongnu.org, saket.sinha89@gmail.com, Stefan Hajnoczi , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Aarushi Mehta Reviewed-by: Stefan Hajnoczi --- configure | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) -- 2.17.1 diff --git a/configure b/configure index 528b9ff705..86383dc0b3 100755 --- a/configure +++ b/configure @@ -365,6 +365,7 @@ xen="" xen_ctrl_version="" xen_pci_passthrough="" linux_aio="" +linux_io_uring="" cap_ng="" attr="" libattr="" @@ -1255,6 +1256,10 @@ for opt do ;; --enable-linux-aio) linux_aio="yes" ;; + --disable-linux-io-uring) linux_io_uring="no" + ;; + --enable-linux-io-uring) linux_io_uring="yes" + ;; --disable-attr) attr="no" ;; --enable-attr) attr="yes" @@ -1773,6 +1778,7 @@ disabled with --disable-FEATURE, default is enabled if available: vde support for vde network netmap support for netmap network linux-aio Linux AIO support + linux-io-uring Linux io_uring support cap-ng libcap-ng support attr attr and xattr support vhost-net vhost-net kernel acceleration support @@ -3962,6 +3968,23 @@ EOF linux_aio=no fi fi +########################################## +# linux-io-uring probe + +if test "$linux_io_uring" != "no" ; then + cat > $TMPC < +int main(void) { io_uring_queue_init(0, NULL, 0); io_uring_submit(NULL); return 0; } +EOF + if compile_prog "" "-luring" ; then + linux_io_uring=yes + else + if test "$linux_io_uring" = "yes" ; then + feature_not_found "linux io_uring" "Install liburing" + fi + linux_io_uring=no + fi +fi ########################################## # TPM emulation is only on POSIX @@ -6378,6 +6401,7 @@ echo "PIE $pie" echo "vde support $vde" echo "netmap support $netmap" echo "Linux AIO support $linux_aio" +echo "Linux io_uring support $linux_io_uring" echo "ATTR/XATTR support $attr" echo "Install blobs $blobs" echo "KVM support $kvm" @@ -6858,6 +6882,9 @@ fi if test "$linux_aio" = "yes" ; then echo "CONFIG_LINUX_AIO=y" >> $config_host_mak fi +if test "$linux_io_uring" = "yes" ; then + echo "CONFIG_LINUX_IO_URING=y" >> $config_host_mak +fi if test "$attr" = "yes" ; then echo "CONFIG_ATTR=y" >> $config_host_mak fi