From patchwork Mon Aug 9 06:12:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12425589 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 54AF4C43214 for ; Mon, 9 Aug 2021 06:25:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 400B560C3F for ; Mon, 9 Aug 2021 06:25:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233234AbhHIG0R (ORCPT ); Mon, 9 Aug 2021 02:26:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46956 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233136AbhHIG0Q (ORCPT ); Mon, 9 Aug 2021 02:26:16 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A4F3C0613CF; Sun, 8 Aug 2021 23:25:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=apzfbAVQKWbGrKYMT3DIf/EpeYrpBdh35Pn+VTLrfXQ=; b=NcZFD3NNNPGQlPbrjZG1a1dc4G x3FGFiNiWHX5318wEvkztp4HGFYFdPDHODJ7nuVObRZNU47m8v7/U8FJ8WxM7yXsAZ/gteG6hd7Rv tQ9tzDFQ47cTVGGTZwZPmWSBOnr06RVmZXZ+GslaKRVK3YujwF7s4qcpqEKtCjJHSwp0h9Txkc/RQ Dn+r7GZ9JYGV1L5BAujplk8mlvGcnItTOtgmaMqycuvQn14GJovJ6fKwgIwR7ryugG0J4fS53H7MX CcJ0NTOZ7wcrnNOT9feUxU58AyuNR+9T8aT7KNZRAsul/M+uBcQIHNkLEB5ZeR2XsA2bfi+ikVTu1 5iso1S7A==; Received: from [2a02:1205:5023:1f80:c068:bd3d:78b3:7d37] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mCyhG-00AhAq-Mc; Mon, 09 Aug 2021 06:23:52 +0000 From: Christoph Hellwig To: "Darrick J. Wong" Cc: Dan Williams , Matthew Wilcox , Andreas Gruenbacher , Shiyang Ruan , linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, nvdimm@lists.linux.dev, cluster-devel@redhat.com Subject: [PATCH 14/30] iomap: switch iomap_file_unshare to use iomap_iter Date: Mon, 9 Aug 2021 08:12:28 +0200 Message-Id: <20210809061244.1196573-15-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210809061244.1196573-1-hch@lst.de> References: <20210809061244.1196573-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Switch iomap_file_unshare to use iomap_iter. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong --- fs/iomap/buffered-io.c | 35 ++++++++++++++++++----------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 4c7e82928cc546..4f525727462f33 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -817,10 +817,12 @@ iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *i, } EXPORT_SYMBOL_GPL(iomap_file_buffered_write); -static loff_t -iomap_unshare_actor(struct inode *inode, loff_t pos, loff_t length, void *data, - struct iomap *iomap, struct iomap *srcmap) +static loff_t iomap_unshare_iter(struct iomap_iter *iter) { + struct iomap *iomap = &iter->iomap; + struct iomap *srcmap = iomap_iter_srcmap(iter); + loff_t pos = iter->pos; + loff_t length = iomap_length(iter); long status = 0; loff_t written = 0; @@ -836,12 +838,12 @@ iomap_unshare_actor(struct inode *inode, loff_t pos, loff_t length, void *data, unsigned long bytes = min_t(loff_t, PAGE_SIZE - offset, length); struct page *page; - status = iomap_write_begin(inode, pos, bytes, + status = iomap_write_begin(iter->inode, pos, bytes, IOMAP_WRITE_F_UNSHARE, &page, iomap, srcmap); if (unlikely(status)) return status; - status = iomap_write_end(inode, pos, bytes, bytes, page, iomap, + status = iomap_write_end(iter->inode, pos, bytes, bytes, page, iomap, srcmap); if (WARN_ON_ONCE(status == 0)) return -EIO; @@ -852,7 +854,7 @@ iomap_unshare_actor(struct inode *inode, loff_t pos, loff_t length, void *data, written += status; length -= status; - balance_dirty_pages_ratelimited(inode->i_mapping); + balance_dirty_pages_ratelimited(iter->inode->i_mapping); } while (length); return written; @@ -862,18 +864,17 @@ int iomap_file_unshare(struct inode *inode, loff_t pos, loff_t len, const struct iomap_ops *ops) { - loff_t ret; - - while (len) { - ret = iomap_apply(inode, pos, len, IOMAP_WRITE, ops, NULL, - iomap_unshare_actor); - if (ret <= 0) - return ret; - pos += ret; - len -= ret; - } + struct iomap_iter iter = { + .inode = inode, + .pos = pos, + .len = len, + .flags = IOMAP_WRITE, + }; + int ret; - return 0; + while ((ret = iomap_iter(&iter, ops)) > 0) + iter.processed = iomap_unshare_iter(&iter); + return ret; } EXPORT_SYMBOL_GPL(iomap_file_unshare);