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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B9CBFC43334 for ; Wed, 6 Jul 2022 06:31:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230362AbiGFGbI (ORCPT ); Wed, 6 Jul 2022 02:31:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231210AbiGFGam (ORCPT ); Wed, 6 Jul 2022 02:30:42 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6BB41A3BF for ; Tue, 5 Jul 2022 23:30:27 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 84FC0B81AEC for ; Wed, 6 Jul 2022 06:30:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A4DAC3411C; Wed, 6 Jul 2022 06:30:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1657089025; bh=PTwnVLqCKTknxTFPAXpZG38/BbOEsnQ5HZjLPj6vgEs=; h=From:To:Cc:Subject:Date:From; b=gstNkweOe/7+xVYqNE9xStimSVujj9AmDdhf5JgNcY5MCoHU+lKImBc2a262m+QrI hEDZUnc4ayavXp2ngUY6KKKAdX7DnEROSBPN1e1YXy8dTLwJioeHX0uMQkHwodNRQV YEOXPjgIX1wBqEMsWUicf9kFm7esDf1ZlvdlvLYxVqyRP2HjUtEx8dPt0hNTnBtoHJ vZh3YWduf+didN2wppVq7rBH7GzYrJicp5xkUYbYoFdHw29KLPDmBSbJ/c/PdQh2WE xn/seLHvCSW3ZkCSAc4UtyWZVhjHRE8FleBkC+u6N6aTVGSVUpyBrmOxHV8+Sd66kc buJSafA3cxPIQ== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu , Hyeong-Jun Kim , Chao Yu Subject: [PATCH] f2fs: fix to invalidate META_MAPPING before DIO write Date: Wed, 6 Jul 2022 14:30:15 +0800 Message-Id: <20220706063015.29727-1-chao@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quoted from commit e3b49ea36802 ("f2fs: invalidate META_MAPPING before IPU/DIO write") " Encrypted pages during GC are read and cached in META_MAPPING. However, due to cached pages in META_MAPPING, there is an issue where newly written pages are lost by IPU or DIO writes. Thread A - f2fs_gc() Thread B /* phase 3 */ down_write(i_gc_rwsem) ra_data_block() ---- (a) up_write(i_gc_rwsem) f2fs_direct_IO() : - down_read(i_gc_rwsem) - __blockdev_direct_io() - get_data_block_dio_write() - f2fs_dio_submit_bio() ---- (b) - up_read(i_gc_rwsem) /* phase 4 */ down_write(i_gc_rwsem) move_data_block() ---- (c) up_write(i_gc_rwsem) (a) In phase 3 of f2fs_gc(), up-to-date page is read from storage and cached in META_MAPPING. (b) In thread B, writing new data by IPU or DIO write on same blkaddr as read in (a). cached page in META_MAPPING become out-dated. (c) In phase 4 of f2fs_gc(), out-dated page in META_MAPPING is copied to new blkaddr. In conclusion, the newly written data in (b) is lost. To address this issue, invalidating pages in META_MAPPING before IPU or DIO write. " In previous commit, we missed to cover extent cache hit case, and passed wrong value for parameter @end of invalidate_mapping_pages(), fix both issues. Fixes: 6aa58d8ad20a ("f2fs: readahead encrypted block during GC") Fixes: e3b49ea36802 ("f2fs: invalidate META_MAPPING before IPU/DIO write") Cc: Hyeong-Jun Kim Signed-off-by: Chao Yu --- fs/f2fs/data.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index c448c3ee7ac3..2d027505d5f6 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1479,9 +1479,12 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, *map->m_next_extent = pgofs + map->m_len; /* for hardware encryption, but to avoid potential issue in future */ - if (flag == F2FS_GET_BLOCK_DIO) + if (flag == F2FS_GET_BLOCK_DIO) { f2fs_wait_on_block_writeback_range(inode, map->m_pblk, map->m_len); + invalidate_mapping_pages(META_MAPPING(sbi), + map->m_pblk, map->m_pblk + map->m_len - 1); + } if (map->m_multidev_dio) { block_t blk_addr = map->m_pblk; @@ -1698,7 +1701,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, f2fs_wait_on_block_writeback_range(inode, map->m_pblk, map->m_len); invalidate_mapping_pages(META_MAPPING(sbi), - map->m_pblk, map->m_pblk); + map->m_pblk, map->m_pblk + map->m_len - 1); if (map->m_multidev_dio) { block_t blk_addr = map->m_pblk; -- 2.25.1