From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3CE3F7F8 for ; Mon, 8 Apr 2024 01:03:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712538230; cv=none; b=nuGEHCRSvE69s48sG0o1Z7jqV9irG9l9vOh5WiO6t2knu8yi8pSQR3ghVXEzV242U9JfVnUt2kzMxcVlslFLuiF0/eiMd5mltKZ3qs0Ib1jkhJ35/jom7TyQ3Mw7l4BBFURHsTLWT8B8z+hGsESpNK04pGdMiHA1WXjNo+pYOac= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712538230; c=relaxed/simple; bh=G0ph6cunqh4BI6Y7mYEhiHK5wINeUPpcYlZGTzhqYbg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=H7FojBNzG21lZyFWO9zmSynDS3O4hk0awzzG8nFIqJCrEuBu3qAP567AX+8OfQGslzJdRRpf/s5dUju55r7JQ6OXpcXxE6ZYXLLqH7XLMpa+zsUJrY73XO3RSBngiY9JdJo2rBSU7xJoylossrrfqOe83zC3Gep31E8RZiTFb+4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=KrABZLKG; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="KrABZLKG" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1712538227; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=e8K243zL1aTj20e6zB2be6Ol4gw5iNqR4+sc1tizRwM=; b=KrABZLKGGP5EKZa2VIWhQxxNWFd9XrWZxhZ71e8kulv6jHngtioA4Kyn/k8VKVFNlAD1xN dbUkuTXz9PyDbBbXZf368073ZBBAFLrvnQ7c+SADlB41J5uVYQ8HFXF1NJQR5Qu8amLUM8 amwHy7u4XB8xwm2ncUAiFalpt7moLSk= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-138-r1tLUudLP0y-v9nKZNhYog-1; Sun, 07 Apr 2024 21:03:41 -0400 X-MC-Unique: r1tLUudLP0y-v9nKZNhYog-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0D06329AB426; Mon, 8 Apr 2024 01:03:41 +0000 (UTC) Received: from localhost (unknown [10.72.116.148]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9CE1D400EBB; Mon, 8 Apr 2024 01:03:39 +0000 (UTC) From: Ming Lei To: Jens Axboe , io-uring@vger.kernel.org Cc: linux-block@vger.kernel.org, Pavel Begunkov , Kevin Wolf , Ming Lei Subject: [RFC PATCH 0/9] io_uring: support sqe group and provide group kbuf Date: Mon, 8 Apr 2024 09:03:13 +0800 Message-ID: <20240408010322.4104395-1-ming.lei@redhat.com> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 Hello, This patch adds sqe user ext flags, generic sqe group usage, and provide group kbuf based on sqe group. sqe group provides one efficient way to share resource among one group of sqes, such as, it can be for implementing multiple copying(copy data from single source to multiple destinations) via single syscall. Finally implements provide group kbuf for uring command, and ublk use this for supporting zero copy, and actually this feature can be used to support generic device zero copy. The last liburing patch adds helpers for using sqe group, also adds tests for sqe group. ublksrv userspace implements zero copy by sqe group & provide group kbuf: https://github.com/ublk-org/ublksrv/commits/group-provide-buf/ git clone https://github.com/ublk-org/ublksrv.git -b group-provide-buf make test T=loop/009:nbd/061:nbd/062 #ublk zc tests Any comments are welcome! Ming Lei (9): io_uring: net: don't check sqe->__pad2[0] for send zc io_uring: support user sqe ext flags io_uring: add helper for filling cqes in __io_submit_flush_completions() io_uring: add one output argument to io_submit_sqe io_uring: support SQE group io_uring: support providing sqe group buffer io_uring/uring_cmd: support provide group kernel buffer ublk: support provide io buffer liburing: support sqe ext_flags & sqe group drivers/block/ublk_drv.c | 156 ++++++++++++++++++- include/linux/io_uring/cmd.h | 9 ++ include/linux/io_uring_types.h | 46 +++++- include/uapi/linux/io_uring.h | 24 ++- include/uapi/linux/ublk_cmd.h | 7 +- io_uring/filetable.h | 2 +- io_uring/io_uring.c | 268 +++++++++++++++++++++++++++++---- io_uring/io_uring.h | 17 ++- io_uring/kbuf.c | 62 ++++++++ io_uring/kbuf.h | 12 ++ io_uring/net.c | 31 +++- io_uring/opdef.c | 5 + io_uring/opdef.h | 2 + io_uring/rw.c | 20 ++- io_uring/uring_cmd.c | 25 ++- 15 files changed, 640 insertions(+), 46 deletions(-) -- 2.42.0