From patchwork Wed Mar 29 14:13:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13192650 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 B7271C77B62 for ; Wed, 29 Mar 2023 14:20:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229680AbjC2OUc (ORCPT ); Wed, 29 Mar 2023 10:20:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54778 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229747AbjC2OSt (ORCPT ); Wed, 29 Mar 2023 10:18:49 -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 B01935FF1 for ; Wed, 29 Mar 2023 07:16:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1680099336; 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=0V0VYuNRGUsctVySLnEH8GinGQ4l5nQcc0Sx6Q5aq0A=; b=NoKayDFREJWHWwPrpnkMHsoFEkkFVWkhoi4o3mvEcn2bF/XFJgDKoBYr/r/HCdmlg9rohq uG1jE5ZN3lC13q76sL5Pqa6K+6TtSYiMxXuRFRSE4EwK52U3KfcAIlb35vJRSZkSFSC5lZ +K8XddaED/pzUQdSxKIKTFbVCV7zxaQ= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-167-kCehxZq9PD6SIf6owZvSow-1; Wed, 29 Mar 2023 10:15:33 -0400 X-MC-Unique: kCehxZq9PD6SIf6owZvSow-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 C7FF3185A790; Wed, 29 Mar 2023 14:15:29 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9BD4C1121330; Wed, 29 Mar 2023 14:15:27 +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 , Chuck Lever III , Linus Torvalds , netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Martin K. Petersen" , linux-scsi@vger.kernel.org, target-devel@vger.kernel.org Subject: [RFC PATCH v2 33/48] iscsi: Assume "sendpage" is okay in iscsi_tcp_segment_map() Date: Wed, 29 Mar 2023 15:13:39 +0100 Message-Id: <20230329141354.516864-34-dhowells@redhat.com> In-Reply-To: <20230329141354.516864-1-dhowells@redhat.com> References: <20230329141354.516864-1-dhowells@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org As iscsi is now using sendmsg() with MSG_SPLICE_PAGES rather than sendpage, assume that sendpage_ok() will return true in iscsi_tcp_segment_map() and leave it to TCP to copy the data if not. Signed-off-by: David Howells cc: "Martin K. Petersen" cc: "David S. Miller" cc: Eric Dumazet cc: Jakub Kicinski cc: Paolo Abeni cc: Jens Axboe cc: Matthew Wilcox cc: linux-scsi@vger.kernel.org cc: target-devel@vger.kernel.org cc: netdev@vger.kernel.org --- drivers/scsi/libiscsi_tcp.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/drivers/scsi/libiscsi_tcp.c b/drivers/scsi/libiscsi_tcp.c index c182aa83f2c9..07ba0d864820 100644 --- a/drivers/scsi/libiscsi_tcp.c +++ b/drivers/scsi/libiscsi_tcp.c @@ -128,18 +128,11 @@ static void iscsi_tcp_segment_map(struct iscsi_segment *segment, int recv) * coalescing neighboring slab objects into a single frag which * triggers one of hardened usercopy checks. */ - if (!recv && sendpage_ok(sg_page(sg))) + if (!recv) return; - if (recv) { - segment->atomic_mapped = true; - segment->sg_mapped = kmap_atomic(sg_page(sg)); - } else { - segment->atomic_mapped = false; - /* the xmit path can sleep with the page mapped so use kmap */ - segment->sg_mapped = kmap(sg_page(sg)); - } - + segment->atomic_mapped = true; + segment->sg_mapped = kmap_atomic(sg_page(sg)); segment->data = segment->sg_mapped + sg->offset + segment->sg_offset; }