From patchwork Wed Oct 14 03:03:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 11837167 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 10B241130 for ; Wed, 14 Oct 2020 09:22:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DD6C3206F4 for ; Wed, 14 Oct 2020 09:22:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="dAJRx/fT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726663AbgJNJW4 (ORCPT ); Wed, 14 Oct 2020 05:22:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731217AbgJNJWy (ORCPT ); Wed, 14 Oct 2020 05:22:54 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B251EC0F26EB; Tue, 13 Oct 2020 20:04:01 -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=4iAeOZdU9QHnYt7ejF3PPD264zNgtL6+n5nU0rXZdys=; b=dAJRx/fTLFMzLRu/24u9ewIUv3 xP30B9BFUpSIa5/3fqHNpra5nwFkI5jcArT2lerdK1DYO6lO1qghDherQqwZ4rbi9eXvgZN0vV61Y ashI2qr1egjhnH51A9G/HzAWN4DvFa1iwZjwwipy2VHCGIpqI1Fg4zSPPFTGsZwMbEz9HsuVLZJNj Nje7S21oyHvQ6RXw8DWwE9iXveCTV75c0/MxTxSnRcf6SJfJk+zXjEMfkegeGDOHDUe2vjoy4CRty UV9zS58yT8WAyrgh2P7zEr7IdGhutz5C/4KuO3jpYGYe2eK0noE6y9ZWgA0Ao7vFLHhDIv/+9PtJI 18TjE90Q==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kSX56-0005iQ-5d; Wed, 14 Oct 2020 03:04:00 +0000 From: "Matthew Wilcox (Oracle)" To: linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org Subject: [PATCH 04/14] iomap: Support THPs in iomap_adjust_read_range Date: Wed, 14 Oct 2020 04:03:47 +0100 Message-Id: <20201014030357.21898-5-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20201014030357.21898-1-willy@infradead.org> References: <20201014030357.21898-1-willy@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-xfs@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 935468d79d9d..95ac66731297 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -82,16 +82,16 @@ 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; @@ -129,7 +129,7 @@ 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; @@ -253,7 +253,7 @@ 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) { @@ -263,7 +263,7 @@ 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; @@ -561,18 +561,19 @@ 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; if (PageUptodate(page)) return 0; ClearPageError(page); + 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;