From patchwork Tue Aug 23 14:12:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 12952305 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 3E94BC32772 for ; Tue, 23 Aug 2022 17:01:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244673AbiHWRBj (ORCPT ); Tue, 23 Aug 2022 13:01:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33820 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343891AbiHWRAd (ORCPT ); Tue, 23 Aug 2022 13:00:33 -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 8899E9E685 for ; Tue, 23 Aug 2022 07:12:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1661263933; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=kYvU0b08zm/V0xwR5oEjOP2aPgvABHjHuDzOrfSOpNM=; b=W2nl2DCx8AZO9DepOOW2xzLTTK4eNjMaJjE4nX8SHMFFf7AXpZ6YB0hkEKl7jQf8admegt Tsghc+vP2LD9CnqHwfiugQVlFE6dR9TOqYDGT/5zCtBZcnA3lHuwQgVPaNyIp+iYZ1BCZc km9POfH6zvB4u7LAkLN5LcIIkXhFLOI= 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-453-IILv1f45PVWyhyOEee0mzQ-1; Tue, 23 Aug 2022 10:12:10 -0400 X-MC-Unique: IILv1f45PVWyhyOEee0mzQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E47CC3C0D85A; Tue, 23 Aug 2022 14:12:08 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id C00AC40CF8E7; Tue, 23 Aug 2022 14:12:07 +0000 (UTC) Subject: [PATCH 0/7] smb3: Add iter helpers and use iov_iters down to the network transport From: David Howells To: Steve French , Al Viro Cc: linux-cifs@vger.kernel.org, Steve French , Rohith Surabattula , Shyam Prasad N , dhowells@redhat.com, Shyam Prasad N , Rohith Surabattula , Jeff Layton , linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 23 Aug 2022 15:12:07 +0100 Message-ID: <166126392703.708021.14465850073772688008.stgit@warthog.procyon.org.uk> User-Agent: StGit/1.5 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Hi Steve, Al, Here's an updated version of a subset of my branch to make the cifs/smb3 driver pass iov_iters down to the lowest layers where they can be passed to the network transport. Al: Could you look at the first two patches, that add extract_iter_to_iter() to see about decanting iterators of various types (but that might have to be lost) into iterators that can be held on to (pinning pages in the process), and iov_iter_scan() which passes each partial page of an iterator to a scanner function to do something with (such as create an sglist element for). Possibly I should add an extract_iter_to_sglist() - I'm doing that in a number of places. Steve: assuming Al is okay with the iov_iter patches, can you look at taking this into your tree (or should it go through mine?)? I've pushed the patches here also: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=cifs-for-viro David --- David Howells (7): iov_iter: Add a function to extract an iter's buffers to a bvec iter iov_iter: Add a general purpose iteration function cifs: Add some helper functions cifs: Add a function to read into an iter from a socket cifs: Change the I/O paths to use an iterator rather than a page list cifs: Remove unused code cifs: Add some RDMA send tracepoints fs/cifs/cifsencrypt.c | 40 +- fs/cifs/cifsfs.h | 3 + fs/cifs/cifsglob.h | 28 +- fs/cifs/cifsproto.h | 11 +- fs/cifs/cifssmb.c | 13 +- fs/cifs/connect.c | 16 + fs/cifs/file.c | 1653 ++++++++++++++++++----------------------- fs/cifs/fscache.c | 22 +- fs/cifs/fscache.h | 10 +- fs/cifs/misc.c | 108 --- fs/cifs/smb2ops.c | 369 +++++---- fs/cifs/smb2pdu.c | 44 +- fs/cifs/smbdirect.c | 335 ++++----- fs/cifs/smbdirect.h | 4 +- fs/cifs/trace.h | 95 +++ fs/cifs/transport.c | 54 +- include/linux/uio.h | 8 + lib/iov_iter.c | 159 +++- 18 files changed, 1391 insertions(+), 1581 deletions(-)