From patchwork Mon Aug 9 06:12:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12425643 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 4E91AC432BE for ; Mon, 9 Aug 2021 06:31:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2A76F60524 for ; Mon, 9 Aug 2021 06:31:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233319AbhHIGcL (ORCPT ); Mon, 9 Aug 2021 02:32:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233309AbhHIGcK (ORCPT ); Mon, 9 Aug 2021 02:32:10 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A63FEC061796; Sun, 8 Aug 2021 23:31:50 -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=HqL4dtQBlH8r6XqvjdbNTjPZJFfVuAPYGFgDwuehvTk=; b=KwrH912KmcDa7SaL/mMA1QAp02 snbcEUyXVl/3hAinxA5L8GyXI66lZuHGGHfx2aDqPiZfnQnS2CVaPCkrPlUb7DYAvvLI/hcsGLQ7g S9isFFS3KRsYumTOPUmIm1x/n4fAHPXtGXDjoVNvcpLCByIH9vYihrY/xypQJjaG4nnLpKOHcQQdU lrqFLRTDWpCLWiuZk40Hn8zdjvT7uMf7wbCkdSKbxYqp2pZZGQw+NCDdyxZpm1uOpIo8HxVcP3X5d xpOVclfp1mdUCnTJM17VHk+806cTq0EaFcDM6/ZZ8Mw43p/YL8O2yLLRJeAzqWam2NAbk6/Mgp99Q 8/Wv6NJw==; 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 1mCyn8-00Aha5-C5; Mon, 09 Aug 2021 06:30:01 +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 21/30] iomap: switch iomap_seek_data to use iomap_iter Date: Mon, 9 Aug 2021 08:12:35 +0200 Message-Id: <20210809061244.1196573-22-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 Rewrite iomap_seek_data to use iomap_iter. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong --- fs/iomap/seek.c | 47 ++++++++++++++++++++++++----------------------- 1 file changed, 24 insertions(+), 23 deletions(-) diff --git a/fs/iomap/seek.c b/fs/iomap/seek.c index fed8f9005f9e46..a845c012b50c67 100644 --- a/fs/iomap/seek.c +++ b/fs/iomap/seek.c @@ -56,47 +56,48 @@ iomap_seek_hole(struct inode *inode, loff_t pos, const struct iomap_ops *ops) } EXPORT_SYMBOL_GPL(iomap_seek_hole); -static loff_t -iomap_seek_data_actor(struct inode *inode, loff_t start, loff_t length, - void *data, struct iomap *iomap, struct iomap *srcmap) +static loff_t iomap_seek_data_iter(const struct iomap_iter *iter, + loff_t *hole_pos) { - loff_t offset = start; + loff_t length = iomap_length(iter); - switch (iomap->type) { + switch (iter->iomap.type) { case IOMAP_HOLE: return length; case IOMAP_UNWRITTEN: - offset = mapping_seek_hole_data(inode->i_mapping, start, - start + length, SEEK_DATA); - if (offset < 0) + *hole_pos = mapping_seek_hole_data(iter->inode->i_mapping, + iter->pos, iter->pos + length, SEEK_DATA); + if (*hole_pos < 0) return length; - fallthrough; + return 0; default: - *(loff_t *)data = offset; + *hole_pos = iter->pos; return 0; } } loff_t -iomap_seek_data(struct inode *inode, loff_t offset, const struct iomap_ops *ops) +iomap_seek_data(struct inode *inode, loff_t pos, const struct iomap_ops *ops) { loff_t size = i_size_read(inode); - loff_t ret; + struct iomap_iter iter = { + .inode = inode, + .pos = pos, + .flags = IOMAP_REPORT, + }; + int ret; /* Nothing to be found before or beyond the end of the file. */ - if (offset < 0 || offset >= size) + if (pos < 0 || pos >= size) return -ENXIO; - while (offset < size) { - ret = iomap_apply(inode, offset, size - offset, IOMAP_REPORT, - ops, &offset, iomap_seek_data_actor); - if (ret < 0) - return ret; - if (ret == 0) - return offset; - offset += ret; - } - + iter.len = size - pos; + while ((ret = iomap_iter(&iter, ops)) > 0) + iter.processed = iomap_seek_data_iter(&iter, &pos); + if (ret < 0) + return ret; + if (iter.len) /* found data before EOF */ + return pos; /* We've reached the end of the file without finding data */ return -ENXIO; }