From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 3CABAC433E1 for ; Fri, 15 May 2020 13:17:21 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DE6D5207D0 for ; Fri, 15 May 2020 13:17:20 +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="pNSPY0+w" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DE6D5207D0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C522290015B; Fri, 15 May 2020 09:17:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4555D80054; Fri, 15 May 2020 09:17:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 20DA28004F; Fri, 15 May 2020 09:17:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0147.hostedemail.com [216.40.44.147]) by kanga.kvack.org (Postfix) with ESMTP id AFB5580052 for ; Fri, 15 May 2020 09:17:02 -0400 (EDT) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 5EAB7283C for ; Fri, 15 May 2020 13:17:02 +0000 (UTC) X-FDA: 76819003884.12.cap34_5a8520f52073d X-HE-Tag: cap34_5a8520f52073d X-Filterd-Recvd-Size: 5603 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf12.hostedemail.com (Postfix) with ESMTP for ; Fri, 15 May 2020 13:17:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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=1J7GDV48P+WkxyUAPsLY8yi6VmGAIbfZnnMIUsA88sE=; b=pNSPY0+wGzcOTijNhI56+Jj0L2 JC7V+EVRmc2dVcCxK6jIAFN8Y7pPJBSbBtdqQHOeoPgTAjrxJBKtRpop8AsLqHtAy04tBvKUkaBLh 1ICdL4u+bCOhAePci6SCaktDl8fPrIaxz2xlaEc0tQAvOqniALurQn7/MDv4U3KfKIeMLgI0D7kcq 8euxSjIRcV8j4vl90PvYNP24wfp5Hc3aOR1OM8dtim4ZufCqbYmX1JdUwhAx5uaiYpcsfj61BSVFk 1MPjCprlAu+XE8mmrKsi12+qZOISLRz0a8Q1MOXNef6MrL+YWzi23ycxJsD62WD2K8Tw4AAuPfcuM mP0Hq+EA==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZaCy-0005Yh-TC; Fri, 15 May 2020 13:17:00 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Christoph Hellwig Subject: [PATCH v4 09/36] fs: Introduce i_blocks_per_page Date: Fri, 15 May 2020 06:16:29 -0700 Message-Id: <20200515131656.12890-10-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200515131656.12890-1-willy@infradead.org> References: <20200515131656.12890-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: "Matthew Wilcox (Oracle)" This helper is useful for both large pages in the page cache and for supporting block size larger than page size. Convert some example users (we have a few different ways of writing this idiom). Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig --- fs/iomap/buffered-io.c | 8 ++++---- fs/jfs/jfs_metapage.c | 2 +- fs/xfs/xfs_aops.c | 2 +- include/linux/pagemap.h | 16 ++++++++++++++++ 4 files changed, 22 insertions(+), 6 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 890c8fcda4f3..4bc37bf8d057 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -46,7 +46,7 @@ iomap_page_create(struct inode *inode, struct page *pag= e) { struct iomap_page *iop =3D to_iomap_page(page); =20 - if (iop || i_blocksize(inode) =3D=3D PAGE_SIZE) + if (iop || i_blocks_per_page(inode, page) <=3D 1) return iop; =20 iop =3D kmalloc(sizeof(*iop), GFP_NOFS | __GFP_NOFAIL); @@ -152,7 +152,7 @@ iomap_iop_set_range_uptodate(struct page *page, unsig= ned off, unsigned len) unsigned int i; =20 spin_lock_irqsave(&iop->uptodate_lock, flags); - for (i =3D 0; i < PAGE_SIZE / i_blocksize(inode); i++) { + for (i =3D 0; i < i_blocks_per_page(inode, page); i++) { if (i >=3D first && i <=3D last) set_bit(i, iop->uptodate); else if (!test_bit(i, iop->uptodate)) @@ -1090,7 +1090,7 @@ iomap_finish_page_writeback(struct inode *inode, st= ruct page *page, mapping_set_error(inode->i_mapping, -EIO); } =20 - WARN_ON_ONCE(i_blocksize(inode) < PAGE_SIZE && !iop); + WARN_ON_ONCE(i_blocks_per_page(inode, page) > 1 && !iop); WARN_ON_ONCE(iop && atomic_read(&iop->write_count) <=3D 0); =20 if (!iop || atomic_dec_and_test(&iop->write_count)) @@ -1386,7 +1386,7 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc= , int error =3D 0, count =3D 0, i; LIST_HEAD(submit_list); =20 - WARN_ON_ONCE(i_blocksize(inode) < PAGE_SIZE && !iop); + WARN_ON_ONCE(i_blocks_per_page(inode, page) > 1 && !iop); WARN_ON_ONCE(iop && atomic_read(&iop->write_count) !=3D 0); =20 /* diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c index a2f5338a5ea1..176580f54af9 100644 --- a/fs/jfs/jfs_metapage.c +++ b/fs/jfs/jfs_metapage.c @@ -473,7 +473,7 @@ static int metapage_readpage(struct file *fp, struct = page *page) struct inode *inode =3D page->mapping->host; struct bio *bio =3D NULL; int block_offset; - int blocks_per_page =3D PAGE_SIZE >> inode->i_blkbits; + int blocks_per_page =3D i_blocks_per_page(inode, page); sector_t page_start; /* address of page in fs blocks */ sector_t pblock; int xlen; diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 1fd4fb7a607c..5b25f5ee84dc 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -544,7 +544,7 @@ xfs_discard_page( page, ip->i_ino, offset); =20 error =3D xfs_bmap_punch_delalloc_range(ip, start_fsb, - PAGE_SIZE / i_blocksize(inode)); + i_blocks_per_page(inode, page)); if (error && !XFS_FORCED_SHUTDOWN(mp)) xfs_alert(mp, "page discard unable to remove delalloc mapping."); out_invalidate: diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index cacd5a30cb9d..1a0bb387948c 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -850,4 +850,20 @@ static inline int page_mkwrite_check_truncate(struct= page *page, return offset; } =20 +/** + * i_blocks_per_page - How many blocks fit in this page. + * @inode: The inode which contains the blocks. + * @page: The (potentially large) page. + * + * If the block size is larger than the size of this page, will return + * zero, + * + * Context: Any context. + * Return: The number of filesystem blocks covered by this page. + */ +static inline +unsigned int i_blocks_per_page(struct inode *inode, struct page *page) +{ + return thp_size(page) >> inode->i_blkbits; +} #endif /* _LINUX_PAGEMAP_H */ --=20 2.26.2