From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 447F9ECDE4B for ; Thu, 8 Nov 2018 22:06:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0AEC320892 for ; Thu, 8 Nov 2018 22:06:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="yuAbuIZP" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0AEC320892 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731985AbeKIHoA (ORCPT ); Fri, 9 Nov 2018 02:44:00 -0500 Received: from mail.kernel.org ([198.145.29.99]:36722 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730680AbeKIHn7 (ORCPT ); Fri, 9 Nov 2018 02:43:59 -0500 Received: from localhost (unknown [208.72.13.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8003B20892; Thu, 8 Nov 2018 22:06:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541714788; bh=iw4JaW7zzl0tyGusNrAVdvT4ByCjZ/BzrZK6v2FCkgA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yuAbuIZPADQUApNNilUZEiuWThcEYMZDXiBS4CbnCN9OReC2UxCVV7qamTnniDQ35 Mt7x8mBe6KWqkPvmrMNQ/6Y/iskpznhUvciO1SYPIdCqCWUb5lYYDLp3cPK4zITJNF 7JLdITA/2b4v48iz0SYUv4UhsRJIThW/5wmEk6ro= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Howells , Sasha Levin Subject: [PATCH 4.9 127/171] rxrpc: Dont check RXRPC_CALL_TX_LAST after calling rxrpc_rotate_tx_window() Date: Thu, 8 Nov 2018 13:51:37 -0800 Message-Id: <20181108215136.442405962@linuxfoundation.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181108215127.257643509@linuxfoundation.org> References: <20181108215127.257643509@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit c479d5f2c2e1ce609da08c075054440d97ddff52 ] We should only call the function to end a call's Tx phase if we rotated the marked-last packet out of the transmission buffer. Make rxrpc_rotate_tx_window() return an indication of whether it just rotated the packet marked as the last out of the transmit buffer, carrying the information out of the locked section in that function. We can then check the return value instead of examining RXRPC_CALL_TX_LAST. Fixes: 70790dbe3f66 ("rxrpc: Pass the last Tx packet marker in the annotation buffer") Signed-off-by: David Howells Signed-off-by: Sasha Levin --- net/rxrpc/input.c | 35 +++++++++++++++++++---------------- 1 file changed, 19 insertions(+), 16 deletions(-) diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c index f3ac85a285a2..7bfde4737cb3 100644 --- a/net/rxrpc/input.c +++ b/net/rxrpc/input.c @@ -216,10 +216,11 @@ static void rxrpc_send_ping(struct rxrpc_call *call, struct sk_buff *skb, /* * Apply a hard ACK by advancing the Tx window. */ -static void rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to, +static bool rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to, struct rxrpc_ack_summary *summary) { struct sk_buff *skb, *list = NULL; + bool rot_last = false; int ix; u8 annotation; @@ -243,15 +244,17 @@ static void rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to, skb->next = list; list = skb; - if (annotation & RXRPC_TX_ANNO_LAST) + if (annotation & RXRPC_TX_ANNO_LAST) { set_bit(RXRPC_CALL_TX_LAST, &call->flags); + rot_last = true; + } if ((annotation & RXRPC_TX_ANNO_MASK) != RXRPC_TX_ANNO_ACK) summary->nr_rot_new_acks++; } spin_unlock(&call->lock); - trace_rxrpc_transmit(call, (test_bit(RXRPC_CALL_TX_LAST, &call->flags) ? + trace_rxrpc_transmit(call, (rot_last ? rxrpc_transmit_rotate_last : rxrpc_transmit_rotate)); wake_up(&call->waitq); @@ -262,6 +265,8 @@ static void rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to, skb->next = NULL; rxrpc_free_skb(skb, rxrpc_skb_tx_freed); } + + return rot_last; } /* @@ -332,11 +337,11 @@ static bool rxrpc_receiving_reply(struct rxrpc_call *call) ktime_get_real()); } - if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags)) - rxrpc_rotate_tx_window(call, top, &summary); if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags)) { - rxrpc_proto_abort("TXL", call, top); - return false; + if (!rxrpc_rotate_tx_window(call, top, &summary)) { + rxrpc_proto_abort("TXL", call, top); + return false; + } } if (!rxrpc_end_tx_phase(call, true, "ETD")) return false; @@ -839,8 +844,12 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb, if (nr_acks > call->tx_top - hard_ack) return rxrpc_proto_abort("AKN", call, 0); - if (after(hard_ack, call->tx_hard_ack)) - rxrpc_rotate_tx_window(call, hard_ack, &summary); + if (after(hard_ack, call->tx_hard_ack)) { + if (rxrpc_rotate_tx_window(call, hard_ack, &summary)) { + rxrpc_end_tx_phase(call, false, "ETA"); + return; + } + } if (nr_acks > 0) { if (skb_copy_bits(skb, offset, buf.acks, nr_acks) < 0) @@ -849,11 +858,6 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb, &summary); } - if (test_bit(RXRPC_CALL_TX_LAST, &call->flags)) { - rxrpc_end_tx_phase(call, false, "ETA"); - return; - } - if (call->rxtx_annotations[call->tx_top & RXRPC_RXTX_BUFF_MASK] & RXRPC_TX_ANNO_LAST && summary.nr_acks == call->tx_top - hard_ack && @@ -875,8 +879,7 @@ static void rxrpc_input_ackall(struct rxrpc_call *call, struct sk_buff *skb) _proto("Rx ACKALL %%%u", sp->hdr.serial); - rxrpc_rotate_tx_window(call, call->tx_top, &summary); - if (test_bit(RXRPC_CALL_TX_LAST, &call->flags)) + if (rxrpc_rotate_tx_window(call, call->tx_top, &summary)) rxrpc_end_tx_phase(call, false, "ETL"); } -- 2.17.1