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GET /api/patches/2194211/?format=api
{ "id": 2194211, "url": "http://patchwork.ozlabs.org/api/patches/2194211/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260207120901.17222-7-hibriansong@gmail.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260207120901.17222-7-hibriansong@gmail.com>", "list_archive_url": null, "date": "2026-02-07T12:09:00", "name": "[v4,6/7] fuse: add 'io-uring' option", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "adf5f71c0226e8c27221b701925bca35a55afeed", "submitter": { "id": 90672, "url": "http://patchwork.ozlabs.org/api/people/90672/?format=api", "name": "Brian Song", "email": "hibriansong@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260207120901.17222-7-hibriansong@gmail.com/mbox/", "series": [ { "id": 491376, "url": "http://patchwork.ozlabs.org/api/series/491376/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=491376", "date": "2026-02-07T12:08:56", "name": "add fuse-over-io_uring support", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/491376/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2194211/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2194211/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20230601 header.b=O6yL/A9C;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4f7VCw03kTz1xvj\n\tfor <incoming@patchwork.ozlabs.org>; Sat, 07 Feb 2026 23:10:52 +1100 (AEDT)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1voh8n-0007GH-LH; Sat, 07 Feb 2026 07:10:21 -0500", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <hibriansong@gmail.com>)\n id 1voh8i-0007Fa-NM\n for qemu-devel@nongnu.org; Sat, 07 Feb 2026 07:10:17 -0500", "from mail-pj1-x1033.google.com ([2607:f8b0:4864:20::1033])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.90_1) (envelope-from <hibriansong@gmail.com>)\n id 1voh8g-000387-PU\n for qemu-devel@nongnu.org; Sat, 07 Feb 2026 07:10:16 -0500", "by mail-pj1-x1033.google.com with SMTP id\n 98e67ed59e1d1-35621aa8c7fso132187a91.2\n for <qemu-devel@nongnu.org>; Sat, 07 Feb 2026 04:10:13 -0800 (PST)", "from brian.. 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helo=mail-pj1-x1033.google.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "This patch adds a new storage export option for storage-export-daemon\nto enable FUSE-over-io_uring via 'io-uring=on|off' (default: off).\n\nThe initialization phase performs a protocol handshake via the legacy\n/dev/fuse interface before transitioning to the io_uring mode.\nIf multiple IOThreads are configured, the export distributes the uring\nqueues to handle requests concurrently.\n\nSuggested-by: Kevin Wolf <kwolf@redhat.com>\nSuggested-by: Stefan Hajnoczi <stefanha@redhat.com>\nSigned-off-by: Brian Song <hibriansong@gmail.com>\n---\n block/export/fuse.c | 3 +--\n docs/tools/qemu-storage-daemon.rst | 7 +++++--\n qapi/block-export.json | 5 ++++-\n storage-daemon/qemu-storage-daemon.c | 1 +\n 4 files changed, 11 insertions(+), 5 deletions(-)\n\n--\n2.43.0", "diff": "diff --git a/block/export/fuse.c b/block/export/fuse.c\nindex abae83041b..09642ccf5a 100644\n--- a/block/export/fuse.c\n+++ b/block/export/fuse.c\n@@ -587,8 +587,7 @@ static int fuse_export_create(BlockExport *blk_exp,\n assert(blk_exp_args->type == BLOCK_EXPORT_TYPE_FUSE);\n\n #ifdef CONFIG_LINUX_IO_URING\n- /* TODO Add FUSE-over-io_uring Option */\n- exp->is_uring = false;\n+ exp->is_uring = args->io_uring;\n exp->uring_queue_depth = FUSE_DEFAULT_URING_QUEUE_DEPTH;\n #else\n if (args->io_uring) {\ndiff --git a/docs/tools/qemu-storage-daemon.rst b/docs/tools/qemu-storage-daemon.rst\nindex 35ab2d7807..ad0f41a78f 100644\n--- a/docs/tools/qemu-storage-daemon.rst\n+++ b/docs/tools/qemu-storage-daemon.rst\n@@ -78,7 +78,7 @@ Standard options:\n .. option:: --export [type=]nbd,id=<id>,node-name=<node-name>[,name=<export-name>][,writable=on|off][,bitmap=<name>]\n --export [type=]vhost-user-blk,id=<id>,node-name=<node-name>,addr.type=unix,addr.path=<socket-path>[,writable=on|off][,logical-block-size=<block-size>][,num-queues=<num-queues>]\n --export [type=]vhost-user-blk,id=<id>,node-name=<node-name>,addr.type=fd,addr.str=<fd>[,writable=on|off][,logical-block-size=<block-size>][,num-queues=<num-queues>]\n- --export [type=]fuse,id=<id>,node-name=<node-name>,mountpoint=<file>[,growable=on|off][,writable=on|off][,allow-other=on|off|auto]\n+ --export [type=]fuse,id=<id>,node-name=<node-name>,mountpoint=<file>[,growable=on|off][,writable=on|off][,allow-other=on|off|auto][,io-uring=on|off]\n --export [type=]vduse-blk,id=<id>,node-name=<node-name>,name=<vduse-name>[,writable=on|off][,num-queues=<num-queues>][,queue-size=<queue-size>][,logical-block-size=<block-size>][,serial=<serial-number>]\n\n is a block export definition. ``node-name`` is the block node that should be\n@@ -111,7 +111,10 @@ Standard options:\n that enabling this option as a non-root user requires enabling the\n user_allow_other option in the global fuse.conf configuration file. Setting\n ``allow-other`` to auto (the default) will try enabling this option, and on\n- error fall back to disabling it.\n+ error fall back to disabling it. Once ``io-uring`` is enabled (off by default),\n+ the FUSE-over-io_uring-related settings will be initialized to bypass the\n+ traditional /dev/fuse communication mechanism and instead use io_uring to\n+ handle FUSE operations.\n\n The ``vduse-blk`` export type takes a ``name`` (must be unique across the host)\n to create the VDUSE device.\ndiff --git a/qapi/block-export.json b/qapi/block-export.json\nindex 9ae703ad01..37f2fc47e2 100644\n--- a/qapi/block-export.json\n+++ b/qapi/block-export.json\n@@ -184,12 +184,15 @@\n # mount the export with allow_other, and if that fails, try again\n # without. (since 6.1; default: auto)\n #\n+# @io-uring: Use FUSE-over-io-uring. (since 10.2; default: false)\n+#\n # Since: 6.0\n ##\n { 'struct': 'BlockExportOptionsFuse',\n 'data': { 'mountpoint': 'str',\n '*growable': 'bool',\n- '*allow-other': 'FuseExportAllowOther' },\n+ '*allow-other': 'FuseExportAllowOther',\n+ '*io-uring': 'bool' },\n 'if': 'CONFIG_FUSE' }\n\n ##\ndiff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-storage-daemon.c\nindex eb72561358..0cd4cd2b58 100644\n--- a/storage-daemon/qemu-storage-daemon.c\n+++ b/storage-daemon/qemu-storage-daemon.c\n@@ -107,6 +107,7 @@ static void help(void)\n #ifdef CONFIG_FUSE\n \" --export [type=]fuse,id=<id>,node-name=<node-name>,mountpoint=<file>\\n\"\n \" [,growable=on|off][,writable=on|off][,allow-other=on|off|auto]\\n\"\n+\" [,io-uring=on|off]\"\n \" export the specified block node over FUSE\\n\"\n \"\\n\"\n #endif /* CONFIG_FUSE */\n", "prefixes": [ "v4", "6/7" ] }