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Mon, 20 Jan 2020 14:20:09 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH v5 07/15] blockdev: adds bdrv_parse_aio to use io_uring Date: Mon, 20 Jan 2020 14:18:50 +0000 Message-Id: <20200120141858.587874-8-stefanha@redhat.com> In-Reply-To: <20200120141858.587874-1-stefanha@redhat.com> References: <20200120141858.587874-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-MC-Unique: C7TU0K1MMQSDEDBx6UegJQ-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: oleksandr@redhat.com, Kevin Wolf , qemu-block@nongnu.org, Julia Suvorova , Markus Armbruster , Max Reitz , Stefan Hajnoczi , Paolo Bonzini , Fam Zheng , Aarushi Mehta , Stefano Garzarella Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Aarushi Mehta Signed-off-by: Aarushi Mehta Acked-by: Stefano Garzarella Signed-off-by: Stefan Hajnoczi --- block.c | 22 ++++++++++++++++++++++ blockdev.c | 12 ++++-------- include/block/block.h | 1 + 3 files changed, 27 insertions(+), 8 deletions(-) diff --git a/block.c b/block.c index ecd09dbbfd..6c2b2bd2e2 100644 --- a/block.c +++ b/block.c @@ -845,6 +845,28 @@ static BlockdevDetectZeroesOptions bdrv_parse_detect_zeroes(QemuOpts *opts, return detect_zeroes; } +/** + * Set open flags for aio engine + * + * Return 0 on success, -1 if the engine specified is invalid + */ +int bdrv_parse_aio(const char *mode, int *flags) +{ + if (!strcmp(mode, "threads")) { + /* do nothing, default */ + } else if (!strcmp(mode, "native")) { + *flags |= BDRV_O_NATIVE_AIO; +#ifdef CONFIG_LINUX_IO_URING + } else if (!strcmp(mode, "io_uring")) { + *flags |= BDRV_O_IO_URING; +#endif + } else { + return -1; + } + + return 0; +} + /** * Set open flags for a given discard mode * diff --git a/blockdev.c b/blockdev.c index 8e029e9c01..6523f9551d 100644 --- a/blockdev.c +++ b/blockdev.c @@ -385,13 +385,9 @@ 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, "threads")) { - /* this is the default */ - } else { - error_setg(errp, "invalid aio option"); - return; + if (bdrv_parse_aio(aio, bdrv_flags) < 0) { + error_setg(errp, "invalid aio option"); + return; } } } @@ -4641,7 +4637,7 @@ 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, diff --git a/include/block/block.h b/include/block/block.h index ea155da45a..2eba61e750 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -301,6 +301,7 @@ void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top, void bdrv_replace_node(BlockDriverState *from, BlockDriverState *to, Error **errp); +int bdrv_parse_aio(const char *mode, int *flags); int bdrv_parse_cache_mode(const char *mode, int *flags, bool *writethrough); int bdrv_parse_discard_flags(const char *mode, int *flags); BdrvChild *bdrv_open_child(const char *filename,