From patchwork Wed Mar 2 14:04:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 547603 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 5D560C433FE for ; Wed, 2 Mar 2022 14:05:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239225AbiCBOGh (ORCPT ); Wed, 2 Mar 2022 09:06:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40174 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233947AbiCBOGg (ORCPT ); Wed, 2 Mar 2022 09:06:36 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 446BF8597F for ; Wed, 2 Mar 2022 06:05:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646229926; 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: in-reply-to:in-reply-to:references:references; bh=IetQs8ytzH9K4JXJeSaAeAjiXEuL1U3Biq66VWVR9d4=; b=FuobiaLGZcilkFHgCiZDfPmpuOFWuot5cA7rKtXh6F+9hm7Lpdma4aGl8ebvN1rZ+7NdpU VaF9dUzNtXAasb0i1RgijcRcey9nlPMtXyP0Sc6hdDp3DmGjmpl2sKlLpymrv4tvwS5HZ/ 2MCiHqf0tIr+hvWWGKt+tQOny/QHG10= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-336-5_GE-VIjNbSHUyixARMaYA-1; Wed, 02 Mar 2022 09:05:21 -0500 X-MC-Unique: 5_GE-VIjNbSHUyixARMaYA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1AC42A0C03; Wed, 2 Mar 2022 14:05:19 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.19]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7E74926E45; Wed, 2 Mar 2022 14:04:50 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 05/19] netfs: Refactor arguments for netfs_alloc_read_request From: David Howells To: linux-cachefs@redhat.com Cc: Jeff Layton , dhowells@redhat.com, Anna Schumaker , Steve French , Dominique Martinet , Jeff Layton , David Wysochanski , Ilya Dryomov , Jeffle Xu , Linus Torvalds , linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Wed, 02 Mar 2022 14:04:50 +0000 Message-ID: <164622989020.3564931.17517006047854958747.stgit@warthog.procyon.org.uk> In-Reply-To: <164622970143.3564931.3656393397237724303.stgit@warthog.procyon.org.uk> References: <164622970143.3564931.3656393397237724303.stgit@warthog.procyon.org.uk> User-Agent: StGit/1.4 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org From: Jeff Layton Pass start and len to the rreq allocator. This should ensure that the fields are set so that init_rreq can use them. Also add a parameter to indicates the origin of the request. Ceph can use this to tell whether to get caps. Signed-off-by: Jeff Layton Signed-off-by: David Howells cc: linux-cachefs@redhat.com --- fs/netfs/read_helper.c | 25 ++++++++++++++++--------- include/linux/netfs.h | 7 +++++++ 2 files changed, 23 insertions(+), 9 deletions(-) diff --git a/fs/netfs/read_helper.c b/fs/netfs/read_helper.c index a90b3fbcb93f..37125ed95d1a 100644 --- a/fs/netfs/read_helper.c +++ b/fs/netfs/read_helper.c @@ -36,8 +36,11 @@ static void netfs_put_subrequest(struct netfs_io_subrequest *subreq, __netfs_put_subrequest(subreq, was_async); } -static struct netfs_io_request *netfs_alloc_read_request(struct address_space *mapping, - struct file *file) +static struct netfs_io_request *netfs_alloc_read_request( + struct address_space *mapping, + struct file *file, + loff_t start, size_t len, + enum netfs_read_origin origin) { static atomic_t debug_ids; struct inode *inode = file ? file_inode(file) : mapping->host; @@ -46,8 +49,11 @@ static struct netfs_io_request *netfs_alloc_read_request(struct address_space *m rreq = kzalloc(sizeof(struct netfs_io_request), GFP_KERNEL); if (rreq) { + rreq->start = start; + rreq->len = len; rreq->mapping = mapping; rreq->inode = inode; + rreq->origin = origin; rreq->netfs_ops = ctx->ops; rreq->i_size = i_size_read(inode); rreq->debug_id = atomic_inc_return(&debug_ids); @@ -874,11 +880,12 @@ void netfs_readahead(struct readahead_control *ractl) if (readahead_count(ractl) == 0) return; - rreq = netfs_alloc_read_request(ractl->mapping, ractl->file); + rreq = netfs_alloc_read_request(ractl->mapping, ractl->file, + readahead_pos(ractl), + readahead_length(ractl), + NETFS_READAHEAD); if (!rreq) return; - rreq->start = readahead_pos(ractl); - rreq->len = readahead_length(ractl); if (ctx->ops->begin_cache_operation) { ret = ctx->ops->begin_cache_operation(rreq); @@ -941,11 +948,10 @@ int netfs_readpage(struct file *file, struct page *subpage) _enter("%lx", folio_index(folio)); - rreq = netfs_alloc_read_request(mapping, file); + rreq = netfs_alloc_read_request(mapping, file, folio_file_pos(folio), + folio_size(folio), NETFS_READPAGE); if (!rreq) goto nomem; - rreq->start = folio_file_pos(folio); - rreq->len = folio_size(folio); if (ctx->ops->begin_cache_operation) { ret = ctx->ops->begin_cache_operation(rreq); @@ -1118,7 +1124,8 @@ int netfs_write_begin(struct file *file, struct address_space *mapping, } ret = -ENOMEM; - rreq = netfs_alloc_read_request(mapping, file); + rreq = netfs_alloc_read_request(mapping, file, folio_file_pos(folio), + folio_size(folio), NETFS_READ_FOR_WRITE); if (!rreq) goto error; rreq->start = folio_file_pos(folio); diff --git a/include/linux/netfs.h b/include/linux/netfs.h index 630b0400e9fa..a5434bc80e1c 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -158,6 +158,12 @@ struct netfs_io_subrequest { #define NETFS_SREQ_NO_PROGRESS 4 /* Set if we didn't manage to read any data */ }; +enum netfs_read_origin { + NETFS_READAHEAD, /* This read was triggered by readahead */ + NETFS_READPAGE, /* This read is a synchronous read */ + NETFS_READ_FOR_WRITE, /* This read is to prepare a write */ +} __mode(byte); + /* * Descriptor for a read helper request. This is used to make multiple I/O * requests on a variety of sources and then stitch the result together. @@ -175,6 +181,7 @@ struct netfs_io_request { size_t submitted; /* Amount submitted for I/O so far */ size_t len; /* Length of the request */ short error; /* 0 or error that occurred */ + enum netfs_read_origin origin; /* Origin of the read */ loff_t i_size; /* Size of the file */ loff_t start; /* Start position */ pgoff_t no_unlock_folio; /* Don't unlock this folio after read */