From patchwork Mon Aug 24 15:16:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matthew Wilcox (Oracle)" X-Patchwork-Id: 11733493 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4E2C813B1 for ; Mon, 24 Aug 2020 15:25:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 36E9C20866 for ; Mon, 24 Aug 2020 15:25:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="H05djLHG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728050AbgHXPYy (ORCPT ); Mon, 24 Aug 2020 11:24:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41312 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727116AbgHXPRN (ORCPT ); Mon, 24 Aug 2020 11:17:13 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE5C9C0613ED; Mon, 24 Aug 2020 08:17:04 -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=dyVV1/WtfynBLYrYkKLGof4OOEqAPKqK6TxXZzYjTco=; b=H05djLHGmbjcLzwN2UkfMkgywz cBT773asAxYxNl0FfZCC4YxpgQYKexyL+T9KYhcLqabzR42Rt+jLn+oAx+Wd+nxEUB68ImToQl8vz iPt8nyRkZaXL7Ak6LzrdCxg2mpHL86NDxywIsPMEBuzsqrQNXk3bv8V4Loz8INQdMhEhY7E5Lwx7o Kig1UbJsto4PSwnYbgxrS5XJf580l7EgSPaJmKs7hn8hCVs2htX5K7NS/GsK+7WexgDVcGswaPiIA 8bUPrHiKrPIPfrYy+7M4pcPyA26Kn4dIlFnyUoy0qCF5Lag0jGZUxtOVefahuOXUR8oGES9ohpwvB 002L+kKA==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kAEDX-0004Cq-9R; Mon, 24 Aug 2020 15:17:03 +0000 From: "Matthew Wilcox (Oracle)" To: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , "Darrick J . Wong" , linux-block@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 05/11] iomap: Support THPs in iomap_adjust_read_range Date: Mon, 24 Aug 2020 16:16:54 +0100 Message-Id: <20200824151700.16097-6-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200824151700.16097-1-willy@infradead.org> References: <20200824151700.16097-1-willy@infradead.org> MIME-Version: 1.0 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Pass the struct page instead of the iomap_page so we can determine the size of the page. Use offset_in_thp() instead of offset_in_page() and use thp_size() instead of PAGE_SIZE. Convert the arguments to be size_t instead of unsigned int, in case pages ever get larger than 2^31 bytes. Signed-off-by: Matthew Wilcox (Oracle) --- fs/iomap/buffered-io.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 2dba054095e8..5cc0343b6a8e 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -76,16 +76,16 @@ iomap_page_release(struct page *page) /* * Calculate the range inside the page that we actually need to read. */ -static void -iomap_adjust_read_range(struct inode *inode, struct iomap_page *iop, - loff_t *pos, loff_t length, unsigned *offp, unsigned *lenp) +static void iomap_adjust_read_range(struct inode *inode, struct page *page, + loff_t *pos, loff_t length, size_t *offp, size_t *lenp) { + struct iomap_page *iop = to_iomap_page(page); loff_t orig_pos = *pos; loff_t isize = i_size_read(inode); unsigned block_bits = inode->i_blkbits; unsigned block_size = (1 << block_bits); - unsigned poff = offset_in_page(*pos); - unsigned plen = min_t(loff_t, PAGE_SIZE - poff, length); + size_t poff = offset_in_thp(page, *pos); + size_t plen = min_t(loff_t, thp_size(page) - poff, length); unsigned first = poff >> block_bits; unsigned last = (poff + plen - 1) >> block_bits; @@ -123,7 +123,7 @@ iomap_adjust_read_range(struct inode *inode, struct iomap_page *iop, * page cache for blocks that are entirely outside of i_size. */ if (orig_pos <= isize && orig_pos + length > isize) { - unsigned end = offset_in_page(isize - 1) >> block_bits; + unsigned end = offset_in_thp(page, isize - 1) >> block_bits; if (first <= end && last > end) plen -= (last - end) * block_size; @@ -234,7 +234,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data, struct iomap_page *iop = iomap_page_create(inode, page); bool same_page = false, is_contig = false; loff_t orig_pos = pos; - unsigned poff, plen; + size_t poff, plen; sector_t sector; if (iomap->type == IOMAP_INLINE) { @@ -244,7 +244,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data, } /* zero post-eof blocks as the page may be mapped */ - iomap_adjust_read_range(inode, iop, &pos, length, &poff, &plen); + iomap_adjust_read_range(inode, page, &pos, length, &poff, &plen); if (plen == 0) goto done; @@ -550,18 +550,19 @@ static int __iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, int flags, struct page *page, struct iomap *srcmap) { - struct iomap_page *iop = iomap_page_create(inode, page); loff_t block_size = i_blocksize(inode); loff_t block_start = pos & ~(block_size - 1); loff_t block_end = (pos + len + block_size - 1) & ~(block_size - 1); - unsigned from = offset_in_page(pos), to = from + len, poff, plen; + unsigned from = offset_in_page(pos), to = from + len; + size_t poff, plen; int status; if (PageUptodate(page)) return 0; + iomap_page_create(inode, page); do { - iomap_adjust_read_range(inode, iop, &block_start, + iomap_adjust_read_range(inode, page, &block_start, block_end - block_start, &poff, &plen); if (plen == 0) break;