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=-12.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 F0621C4727C for ; Wed, 30 Sep 2020 01:56:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E6792145D for ; Wed, 30 Sep 2020 01:56:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=suse.com header.i=@suse.com header.b="fDCNEogy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729789AbgI3B4G (ORCPT ); Tue, 29 Sep 2020 21:56:06 -0400 Received: from mx2.suse.de ([195.135.220.15]:49782 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729322AbgI3B4G (ORCPT ); Tue, 29 Sep 2020 21:56:06 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1601430964; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jP9FwPA9Ej1+1IIt4+e8jeWQM8EIJBbCYcmANbkFg+U=; b=fDCNEogy0twg2PQfvD08xBL1TacfLbRCPz76CZIiH3lsDHTLX/xHlXdQheUptxn9xDK5lx vE7ruqE4nK5skSQ2cvP2onlr3LGFkfA/VJtfum4sUluRJfHst72po515om0kRaJDmXdfXY Dl1V5pYa0Wz6J9pU0SeYz7uGWzco55c= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 7292AAF95 for ; Wed, 30 Sep 2020 01:56:04 +0000 (UTC) From: Qu Wenruo To: linux-btrfs@vger.kernel.org Subject: [PATCH v3 09/49] btrfs: extent_io: remove the forward declaration and rename __process_pages_contig Date: Wed, 30 Sep 2020 09:54:59 +0800 Message-Id: <20200930015539.48867-10-wqu@suse.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200930015539.48867-1-wqu@suse.com> References: <20200930015539.48867-1-wqu@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org There is no need to do forward declaration for __process_pages_contig(), so move it before it get first called. Since we are here, also remove the "__" prefix since there is no special meaning for it. Signed-off-by: Qu Wenruo --- fs/btrfs/extent_io.c | 180 +++++++++++++++++++++++-------------------- 1 file changed, 95 insertions(+), 85 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 02c3518afa82..9f46d7f17a9c 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1810,10 +1810,98 @@ bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start, return found; } -static int __process_pages_contig(struct address_space *mapping, - struct page *locked_page, - pgoff_t start_index, pgoff_t end_index, - unsigned long page_ops, pgoff_t *index_ret); +/* + * A helper to update contiguous pages status according to @page_ops. + * + * @mapping: The address space of the pages + * @locked_page: The already locked page. Mostly for inline extent + * handling + * @start_index: The start page index. + * @end_inde: The last page index. + * @pages_opts: The operations to be done + * @index_ret: The last handled page index (for error case) + * + * Return 0 if every page is handled properly. + * Return <0 if something wrong happened, and update @index_ret. + */ +static int process_pages_contig(struct address_space *mapping, + struct page *locked_page, + pgoff_t start_index, pgoff_t end_index, + unsigned long page_ops, pgoff_t *index_ret) +{ + unsigned long nr_pages = end_index - start_index + 1; + unsigned long pages_locked = 0; + pgoff_t index = start_index; + struct page *pages[16]; + unsigned ret; + int err = 0; + int i; + + if (page_ops & PAGE_LOCK) { + ASSERT(page_ops == PAGE_LOCK); + ASSERT(index_ret && *index_ret == start_index); + } + + if ((page_ops & PAGE_SET_ERROR) && nr_pages > 0) + mapping_set_error(mapping, -EIO); + + while (nr_pages > 0) { + ret = find_get_pages_contig(mapping, index, + min_t(unsigned long, + nr_pages, ARRAY_SIZE(pages)), pages); + if (ret == 0) { + /* + * Only if we're going to lock these pages, + * can we find nothing at @index. + */ + ASSERT(page_ops & PAGE_LOCK); + err = -EAGAIN; + goto out; + } + + for (i = 0; i < ret; i++) { + if (page_ops & PAGE_SET_PRIVATE2) + SetPagePrivate2(pages[i]); + + if (locked_page && pages[i] == locked_page) { + put_page(pages[i]); + pages_locked++; + continue; + } + if (page_ops & PAGE_CLEAR_DIRTY) + clear_page_dirty_for_io(pages[i]); + if (page_ops & PAGE_SET_WRITEBACK) + set_page_writeback(pages[i]); + if (page_ops & PAGE_SET_ERROR) + SetPageError(pages[i]); + if (page_ops & PAGE_END_WRITEBACK) + end_page_writeback(pages[i]); + if (page_ops & PAGE_UNLOCK) + unlock_page(pages[i]); + if (page_ops & PAGE_LOCK) { + lock_page(pages[i]); + if (!PageDirty(pages[i]) || + pages[i]->mapping != mapping) { + unlock_page(pages[i]); + for (; i < ret; i++) + put_page(pages[i]); + err = -EAGAIN; + goto out; + } + } + put_page(pages[i]); + pages_locked++; + } + nr_pages -= ret; + index += ret; + cond_resched(); + } +out: + if (err && index_ret) + *index_ret = start_index + pages_locked - 1; + return err; +} + static noinline void __unlock_for_delalloc(struct inode *inode, struct page *locked_page, @@ -1826,7 +1914,7 @@ static noinline void __unlock_for_delalloc(struct inode *inode, if (index == locked_page->index && end_index == index) return; - __process_pages_contig(inode->i_mapping, locked_page, index, end_index, + process_pages_contig(inode->i_mapping, locked_page, index, end_index, PAGE_UNLOCK, NULL); } @@ -1844,7 +1932,7 @@ static noinline int lock_delalloc_pages(struct inode *inode, if (index == locked_page->index && index == end_index) return 0; - ret = __process_pages_contig(inode->i_mapping, locked_page, index, + ret = process_pages_contig(inode->i_mapping, locked_page, index, end_index, PAGE_LOCK, &index_ret); if (ret == -EAGAIN) __unlock_for_delalloc(inode, locked_page, delalloc_start, @@ -1941,84 +2029,6 @@ noinline_for_stack bool find_lock_delalloc_range(struct inode *inode, return found; } -static int __process_pages_contig(struct address_space *mapping, - struct page *locked_page, - pgoff_t start_index, pgoff_t end_index, - unsigned long page_ops, pgoff_t *index_ret) -{ - unsigned long nr_pages = end_index - start_index + 1; - unsigned long pages_locked = 0; - pgoff_t index = start_index; - struct page *pages[16]; - unsigned ret; - int err = 0; - int i; - - if (page_ops & PAGE_LOCK) { - ASSERT(page_ops == PAGE_LOCK); - ASSERT(index_ret && *index_ret == start_index); - } - - if ((page_ops & PAGE_SET_ERROR) && nr_pages > 0) - mapping_set_error(mapping, -EIO); - - while (nr_pages > 0) { - ret = find_get_pages_contig(mapping, index, - min_t(unsigned long, - nr_pages, ARRAY_SIZE(pages)), pages); - if (ret == 0) { - /* - * Only if we're going to lock these pages, - * can we find nothing at @index. - */ - ASSERT(page_ops & PAGE_LOCK); - err = -EAGAIN; - goto out; - } - - for (i = 0; i < ret; i++) { - if (page_ops & PAGE_SET_PRIVATE2) - SetPagePrivate2(pages[i]); - - if (locked_page && pages[i] == locked_page) { - put_page(pages[i]); - pages_locked++; - continue; - } - if (page_ops & PAGE_CLEAR_DIRTY) - clear_page_dirty_for_io(pages[i]); - if (page_ops & PAGE_SET_WRITEBACK) - set_page_writeback(pages[i]); - if (page_ops & PAGE_SET_ERROR) - SetPageError(pages[i]); - if (page_ops & PAGE_END_WRITEBACK) - end_page_writeback(pages[i]); - if (page_ops & PAGE_UNLOCK) - unlock_page(pages[i]); - if (page_ops & PAGE_LOCK) { - lock_page(pages[i]); - if (!PageDirty(pages[i]) || - pages[i]->mapping != mapping) { - unlock_page(pages[i]); - for (; i < ret; i++) - put_page(pages[i]); - err = -EAGAIN; - goto out; - } - } - put_page(pages[i]); - pages_locked++; - } - nr_pages -= ret; - index += ret; - cond_resched(); - } -out: - if (err && index_ret) - *index_ret = start_index + pages_locked - 1; - return err; -} - void extent_clear_unlock_delalloc(struct btrfs_inode *inode, u64 start, u64 end, struct page *locked_page, unsigned clear_bits, @@ -2026,7 +2036,7 @@ void extent_clear_unlock_delalloc(struct btrfs_inode *inode, u64 start, u64 end, { clear_extent_bit(&inode->io_tree, start, end, clear_bits, 1, 0, NULL); - __process_pages_contig(inode->vfs_inode.i_mapping, locked_page, + process_pages_contig(inode->vfs_inode.i_mapping, locked_page, start >> PAGE_SHIFT, end >> PAGE_SHIFT, page_ops, NULL); } -- 2.28.0