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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 57044C43331 for ; Mon, 30 Mar 2020 09:13:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2EFC3206CC for ; Mon, 30 Mar 2020 09:13:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727846AbgC3JN4 (ORCPT ); Mon, 30 Mar 2020 05:13:56 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:48142 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726385AbgC3JN4 (ORCPT ); Mon, 30 Mar 2020 05:13:56 -0400 Received: from DGGEMS407-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id ABE325328BAC93D9E736; Mon, 30 Mar 2020 17:13:44 +0800 (CST) Received: from szvp000203569.huawei.com (10.120.216.130) by DGGEMS407-HUB.china.huawei.com (10.3.19.207) with Microsoft SMTP Server id 14.3.487.0; Mon, 30 Mar 2020 17:13:37 +0800 From: Chao Yu To: CC: , , , Chao Yu Subject: [PATCH v3] f2fs: introduce f2fs_bmap_compress() Date: Mon, 30 Mar 2020 17:13:29 +0800 Message-ID: <20200330091329.46357-1-yuchao0@huawei.com> X-Mailer: git-send-email 2.18.0.rc1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.120.216.130] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org to support bmap() on compressed inode: if queried block locates in non-compressed cluster, return its physical block address. Signed-off-by: Chao Yu --- v3: - use round_down instead of rounddown to avoid compile error. fs/f2fs/data.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 24643680489b..2fcd70fd2cbb 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -3585,6 +3585,37 @@ static int f2fs_set_data_page_dirty(struct page *page) return 0; } + +static sector_t f2fs_bmap_compress(struct inode *inode, sector_t block) +{ +#ifdef CONFIG_F2FS_FS_COMPRESSION + struct dnode_of_data dn; + sector_t start_idx, blknr = 0; + int ret; + + start_idx = round_down(block, F2FS_I(inode)->i_cluster_size); + + set_new_dnode(&dn, inode, NULL, NULL, 0); + ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); + if (ret) + return 0; + + if (dn.data_blkaddr != COMPRESS_ADDR) { + dn.ofs_in_node += block - start_idx; + blknr = f2fs_data_blkaddr(&dn); + if (!__is_valid_data_blkaddr(blknr)) + blknr = 0; + } + + f2fs_put_dnode(&dn); + + return blknr; +#else + return -EOPNOTSUPP; +#endif +} + + static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) { struct inode *inode = mapping->host; @@ -3596,6 +3627,9 @@ static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) filemap_write_and_wait(mapping); + if (f2fs_compressed_file(inode)) + return f2fs_bmap_compress(inode, block); + return generic_block_bmap(mapping, block, get_data_block_bmap); } -- 2.18.0.rc1