From af697c0f5c5b8798832e651baf23460d588393de Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Wed, 11 Jul 2018 18:30:42 -0700 Subject: [PATCH] f2fs: keep meta pages in cp_error state It turns out losing meta pages in shutdown period makes f2fs very unstable so that I could see many unexpected error conditions. Let's keep meta pages for fault injection and sudden power-off tests. Signed-off-by: Jaegeuk Kim --- fs/f2fs/checkpoint.c | 28 +++++++++++++--------------- 1 file changed, 13 insertions(+), 15 deletions(-) diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 9f1c96caebda..fe92d2372f4a 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -242,11 +242,8 @@ static int __f2fs_write_meta_page(struct page *page, trace_f2fs_writepage(page, META); - if (unlikely(f2fs_cp_error(sbi))) { - dec_page_count(sbi, F2FS_DIRTY_META); - unlock_page(page); - return 0; - } + if (unlikely(f2fs_cp_error(sbi))) + goto redirty_out; if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) goto redirty_out; if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0)) @@ -1129,6 +1126,9 @@ static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi) if (!get_pages(sbi, F2FS_WB_CP_DATA)) break; + if (unlikely(f2fs_cp_error(sbi))) + break; + io_schedule_timeout(5*HZ); } finish_wait(&sbi->cp_wait, &wait); @@ -1202,8 +1202,12 @@ static void commit_checkpoint(struct f2fs_sb_info *sbi, /* writeout cp pack 2 page */ err = __f2fs_write_meta_page(page, &wbc, FS_CP_META_IO); - f2fs_bug_on(sbi, err); + if (unlikely(err && f2fs_cp_error(sbi))) { + f2fs_put_page(page, 1); + return; + } + f2fs_bug_on(sbi, err); f2fs_put_page(page, 0); /* submit checkpoint (with barrier if NOBARRIER is not set) */ @@ -1229,7 +1233,7 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) while (get_pages(sbi, F2FS_DIRTY_META)) { f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO); if (unlikely(f2fs_cp_error(sbi))) - return -EIO; + break; } /* @@ -1309,7 +1313,7 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO); if (unlikely(f2fs_cp_error(sbi))) - return -EIO; + break; } } @@ -1350,9 +1354,6 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) /* wait for previous submitted meta pages writeback */ wait_on_all_pages_writeback(sbi); - if (unlikely(f2fs_cp_error(sbi))) - return -EIO; - /* flush all device cache */ err = f2fs_flush_device_cache(sbi); if (err) @@ -1364,9 +1365,6 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) f2fs_release_ino_entry(sbi, false); - if (unlikely(f2fs_cp_error(sbi))) - return -EIO; - clear_sbi_flag(sbi, SBI_IS_DIRTY); clear_sbi_flag(sbi, SBI_NEED_CP); __set_cp_next_pack(sbi); @@ -1381,7 +1379,7 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_DENTS)); - return 0; + return unlikely(f2fs_cp_error(sbi)) ? -EIO : 0; } /* -- 2.11.0