Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 95966C76196 for ; Thu, 16 Mar 2023 15:30:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231542AbjCPPag (ORCPT ); Thu, 16 Mar 2023 11:30:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229522AbjCPP3P (ORCPT ); Thu, 16 Mar 2023 11:29:15 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 16126DF71D for ; Thu, 16 Mar 2023 08:27:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1678980446; 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: in-reply-to:in-reply-to:references:references; bh=cLmy3QT3PxPcXOXP8Tmrcj7ottmHeL6VPbhO66kxXIU=; b=d5TjsrHgQl5r9aHS7CVxubB8HhKntto+vFPnb/vLaGsgVjho2RwueCq5Um+0yX5UXpFdO2 stFF3BnmOuh67tRnr4zU8+OPK1LmeTFuzoekmVyCk62BvATSgDaPM1kROZtEhqe5zMw5QI BZl76FCXViheZhmhbEhweAws8VkPeb0= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-531-HxkbzJbbNIOwbn5zC8ZlYg-1; Thu, 16 Mar 2023 11:27:24 -0400 X-MC-Unique: HxkbzJbbNIOwbn5zC8ZlYg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 684F938149BF; Thu, 16 Mar 2023 15:27:18 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id 521EB1121315; Thu, 16 Mar 2023 15:27:16 +0000 (UTC) From: David Howells To: Matthew Wilcox , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: David Howells , Al Viro , Christoph Hellwig , Jens Axboe , Jeff Layton , Christian Brauner , Linus Torvalds , netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, John Fastabend , Jakub Sitnicki , bpf@vger.kernel.org Subject: [RFC PATCH 21/28] tcp_bpf: Make tcp_bpf_sendpage() go through tcp_bpf_sendmsg(MSG_SPLICE_PAGES) Date: Thu, 16 Mar 2023 15:26:11 +0000 Message-Id: <20230316152618.711970-22-dhowells@redhat.com> In-Reply-To: <20230316152618.711970-1-dhowells@redhat.com> References: <20230316152618.711970-1-dhowells@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Translate tcp_bpf_sendpage() calls to tcp_bpf_sendmsg(MSG_SPLICE_PAGES). Signed-off-by: David Howells cc: John Fastabend cc: Jakub Sitnicki cc: "David S. Miller" cc: Eric Dumazet cc: Jakub Kicinski cc: Paolo Abeni cc: Jens Axboe cc: Matthew Wilcox cc: bpf@vger.kernel.org cc: netdev@vger.kernel.org --- net/ipv4/tcp_bpf.c | 49 +++++++++------------------------------------- 1 file changed, 9 insertions(+), 40 deletions(-) diff --git a/net/ipv4/tcp_bpf.c b/net/ipv4/tcp_bpf.c index 7f17134637eb..de37a4372437 100644 --- a/net/ipv4/tcp_bpf.c +++ b/net/ipv4/tcp_bpf.c @@ -485,49 +485,18 @@ static int tcp_bpf_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) static int tcp_bpf_sendpage(struct sock *sk, struct page *page, int offset, size_t size, int flags) { - struct sk_msg tmp, *msg = NULL; - int err = 0, copied = 0; - struct sk_psock *psock; - bool enospc = false; - - psock = sk_psock_get(sk); - if (unlikely(!psock)) - return tcp_sendpage(sk, page, offset, size, flags); + struct bio_vec bvec; + struct msghdr msg = { + .msg_flags = flags | MSG_SPLICE_PAGES, + }; - lock_sock(sk); - if (psock->cork) { - msg = psock->cork; - } else { - msg = &tmp; - sk_msg_init(msg); - } + bvec_set_page(&bvec, page, size, offset); + iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size); - /* Catch case where ring is full and sendpage is stalled. */ - if (unlikely(sk_msg_full(msg))) - goto out_err; - - sk_msg_page_add(msg, page, size, offset); - sk_mem_charge(sk, size); - copied = size; - if (sk_msg_full(msg)) - enospc = true; - if (psock->cork_bytes) { - if (size > psock->cork_bytes) - psock->cork_bytes = 0; - else - psock->cork_bytes -= size; - if (psock->cork_bytes && !enospc) - goto out_err; - /* All cork bytes are accounted, rerun the prog. */ - psock->eval = __SK_NONE; - psock->cork_bytes = 0; - } + if (flags & MSG_SENDPAGE_NOTLAST) + msg.msg_flags |= MSG_MORE; - err = tcp_bpf_send_verdict(sk, psock, msg, &copied, flags); -out_err: - release_sock(sk); - sk_psock_put(sk, psock); - return copied ? copied : err; + return tcp_bpf_sendmsg(sk, &msg, size); } enum {