From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f50.google.com (mail-io1-f50.google.com [209.85.166.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 49E6C74BED for ; Thu, 9 May 2024 18:06:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.50 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715277993; cv=none; b=FXx9sKx9fZokXb6CIVDCmBJ67r/XQJ/gYMMvYH7Bvcj1rpTfBpqcCLf/Z5QqZuuJQTlaN94eYdpB945y9TQAxtQsow5Mi6/24JBDZwIFpdXtFE8TEJ7/yd4Qk2ex9bcVJwUTENOIXsqFgr+RH/DPVxQM6hmEXDidjUiLzy4nPsw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715277993; c=relaxed/simple; bh=nJvf0+19Ak6nMFO86nEpkL3u66B7rYi6FXxb2XlHaao=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=OnyEumzHwqxx6enT194Gvf5q/jDcgdvgdSw/emrLTFOTdgHg1NihE2w2t5b/1J75VA3naLHDG7vE2bqkxK2CS7rcv06CA6OXXtbJ1eP5k8NPoMtYaLsUs9n97pEqJgCCLaxr/01OjULYosbG8X4NbON0dcm1SHCq15FJEk778ko= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk; spf=pass smtp.mailfrom=kernel.dk; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b=dVBrBlMx; arc=none smtp.client-ip=209.85.166.50 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernel.dk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b="dVBrBlMx" Received: by mail-io1-f50.google.com with SMTP id ca18e2360f4ac-7e18fe3164eso9758639f.2 for ; Thu, 09 May 2024 11:06:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20230601.gappssmtp.com; s=20230601; t=1715277990; x=1715882790; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=VuaEukQr5J4tL+gRi+BGlLSodzKp68yXFmo7ZSi6OlQ=; b=dVBrBlMxIfqzqYKy+8TEMlw8Dn8xKwX1nMAggEsR3C8S0MowieY/yiQp7Xefmu95Lb 98ZbwJr88ZgMeMdFGshcjb+hplSpBPY1qW8pe2QNf3ijgSz9yhmsTkrharFJcTtwZTBf vBo3hDaeAMC0IaDySp24hQpZNw+b/oKhFEWVKebSRUUPEz2M2SyeJpkPDYNn1HylppzG bh6uhSvcKpzZUgokNelbnQSS6ns50KohOLKhCY+h6/Az4OA0f/7dLX2rGR9j89uta58h uGqPLN14yimIfzxn7/uuYmbxrLSTe5U7IhLlG67T62hGyFzkEBq9JZfN2WcOSp1ElkBR Euhw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1715277990; x=1715882790; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=VuaEukQr5J4tL+gRi+BGlLSodzKp68yXFmo7ZSi6OlQ=; b=jn7OYt7YU1D1L0gqXtCP9ai7UdDZp8wIV5FzNOdDg753B25GWh8vizMp8i8GdJGRg7 eVZdBtgPAAsOi84QGyFo1MJIHK6//2bQFw9KB3xuH2ivPTgdGeDtdKNLjDiVhKagk1p5 xa6eQoVPSiFCgRCrzoOp2u4qERO/uXCFHzgsZMQbsvqL8wt2/YdOfAX+85e1SDUVHZYf xdh91l9tnYB7c2jKYXfHgwkRdo6BQWLBNYeq3EJz1fcmh4tAvQjcoc+l7KNLytL9tD8L t8L+FXRZlRsNWruJeyoEVjkTHDOkJkp5vPqMo0IyGycBXGQQTmzgptNqziXKcHmrMScR rR2w== X-Gm-Message-State: AOJu0YxHWD3DrxKoEK4h1mD//Keaq9iv2qmW9k/m7NR/kjbXm80B4tZ5 p5GY5CnyQshtN/melD0KenaAZ+F2bLWCV+mcjHWGXowePeA4SayHCyACBdjOJbaAx1c1lLJ89UR r X-Google-Smtp-Source: AGHT+IGlgkx997Vi/uU0WCbQDYcHNPDaGv6PRCSt8JvQCfR93Xc8AcpWOapgSvjFHzDeEcG2Y2vj0g== X-Received: by 2002:a6b:d203:0:b0:7de:e04b:42c3 with SMTP id ca18e2360f4ac-7e1b5022577mr62443939f.0.1715277989657; Thu, 09 May 2024 11:06:29 -0700 (PDT) Received: from localhost.localdomain ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id ca18e2360f4ac-7e1b23ab4f6sm19468739f.50.2024.05.09.11.06.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 May 2024 11:06:29 -0700 (PDT) From: Jens Axboe To: io-uring@vger.kernel.org, netdev@vger.kernel.org Cc: kuba@kernel.org Subject: [PATCHSET RFC 0/4] Propagate back queue status on accept Date: Thu, 9 May 2024 12:00:25 -0600 Message-ID: <20240509180627.204155-1-axboe@kernel.dk> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi, With io_uring, one thing we can do is tell userspace whether or not there's more data left in a socket after a receive is done. This is useful for applications to now, and it also helps make multishot receive requests more efficient by eliminating that last failed retry when the socket has no more data left. This is propagated by setting the IORING_CQE_F_SOCK_NONEMPTY flag, and is driven by setting msghdr->msg_get_inq and having the protocol fill out msghdr->msg_inq in that case. For accept, there's a similar issue in that we'd like to know if there are more connections to accept after the current one has been accepted. Both because we can tell userspace about it, but also to drive multishot accept retries more efficiently, similar to recv/recvmsg. This series starts by changing the proto/proto_ops accept prototypes to eliminate flags/errp/kern and replace it with a structure that encompasses all of them. Then patch 2 changes do_accept(), which io_uring uses, to take that as well. Patch 3 finally adds the basic is_empty argument to the struct, and fills it in for TCP. And finally patch 4 adds support for this in io_uring. Comments welcome! Patchset is against current -git, with the io_uring and net-next changes for 6.10 merged in. Branch can be found here: https://git.kernel.dk/cgit/linux/log/?h=net-accept-more crypto/af_alg.c | 11 ++++++----- crypto/algif_hash.c | 10 +++++----- drivers/xen/pvcalls-back.c | 6 +++++- fs/ocfs2/cluster/tcp.c | 5 ++++- include/crypto/if_alg.h | 3 ++- include/linux/net.h | 4 +++- include/linux/socket.h | 3 ++- include/net/inet_common.h | 4 ++-- include/net/inet_connection_sock.h | 2 +- include/net/sock.h | 13 ++++++++++--- io_uring/net.c | 26 ++++++++++++++++++++------ net/atm/svc.c | 8 ++++---- net/ax25/af_ax25.c | 6 +++--- net/bluetooth/iso.c | 4 ++-- net/bluetooth/l2cap_sock.c | 4 ++-- net/bluetooth/rfcomm/sock.c | 6 +++--- net/bluetooth/sco.c | 4 ++-- net/core/sock.c | 4 ++-- net/ipv4/af_inet.c | 10 +++++----- net/ipv4/inet_connection_sock.c | 7 ++++--- net/llc/af_llc.c | 7 +++---- net/mptcp/protocol.c | 8 ++++---- net/netrom/af_netrom.c | 6 +++--- net/nfc/llcp_sock.c | 4 ++-- net/phonet/pep.c | 12 ++++++------ net/phonet/socket.c | 7 +++---- net/rds/tcp_listen.c | 6 +++++- net/rose/af_rose.c | 6 +++--- net/sctp/socket.c | 8 ++++---- net/smc/af_smc.c | 6 +++--- net/socket.c | 15 ++++++++++----- net/tipc/socket.c | 10 ++++------ net/unix/af_unix.c | 10 +++++----- net/vmw_vsock/af_vsock.c | 6 +++--- net/x25/af_x25.c | 4 ++-- 35 files changed, 147 insertions(+), 108 deletions(-) -- Jens Axboe