diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-12-20 06:16:34 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-26 11:42:47 +0300 |
| commit | f666f11a266a5702073df7a02f1076ea3f4d092c (patch) | |
| tree | 294fbf6beb62f3042cf5baa7f0eecc4b5c9b0ee4 /fs/f2fs | |
| parent | a4f4f97573bfb057bbc30696d803cc37ed629d02 (diff) | |
| download | linux-f666f11a266a5702073df7a02f1076ea3f4d092c.tar.xz | |
f2fs: return error during fill_super
commit c39a1b348c4fe172729eff77c533dabc3c7cdaa7 upstream.
Let's avoid BUG_ON during fill_super, when on-disk was totall corrupted.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 4.4: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/segment.c | 16 | ||||
| -rw-r--r-- | fs/f2fs/segment.h | 22 |
2 files changed, 30 insertions, 8 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index c0dfe2a7295f..4219335ce1bc 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -2101,7 +2101,7 @@ static int build_curseg(struct f2fs_sb_info *sbi) return restore_curseg_summaries(sbi); } -static void build_sit_entries(struct f2fs_sb_info *sbi) +static int build_sit_entries(struct f2fs_sb_info *sbi) { struct sit_info *sit_i = SIT_I(sbi); struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); @@ -2110,6 +2110,7 @@ static void build_sit_entries(struct f2fs_sb_info *sbi) unsigned int i, start, end; unsigned int readed, start_blk = 0; int nrpages = MAX_BIO_BLOCKS(sbi); + int err = 0; do { readed = ra_meta_pages(sbi, start_blk, nrpages, META_SIT, true); @@ -2128,7 +2129,9 @@ static void build_sit_entries(struct f2fs_sb_info *sbi) sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)]; f2fs_put_page(page, 1); - check_block_count(sbi, start, &sit); + err = check_block_count(sbi, start, &sit); + if (err) + return err; seg_info_from_raw_sit(se, &sit); /* build discard map only one time */ @@ -2154,7 +2157,9 @@ static void build_sit_entries(struct f2fs_sb_info *sbi) old_valid_blocks = se->valid_blocks; - check_block_count(sbi, start, &sit); + err = check_block_count(sbi, start, &sit); + if (err) + break; seg_info_from_raw_sit(se, &sit); memcpy(se->discard_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE); @@ -2165,6 +2170,7 @@ static void build_sit_entries(struct f2fs_sb_info *sbi) se->valid_blocks - old_valid_blocks; } mutex_unlock(&curseg->curseg_mutex); + return err; } static void init_free_segmap(struct f2fs_sb_info *sbi) @@ -2326,7 +2332,9 @@ int build_segment_manager(struct f2fs_sb_info *sbi) return err; /* reinit free segmap based on SIT */ - build_sit_entries(sbi); + err = build_sit_entries(sbi); + if (err) + return err; init_free_segmap(sbi); err = build_dirty_segmap(sbi); diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 3ccd02396e83..fde16f2a065b 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -585,7 +585,7 @@ static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr) /* * Summary block is always treated as an invalid block */ -static inline void check_block_count(struct f2fs_sb_info *sbi, +static inline int check_block_count(struct f2fs_sb_info *sbi, int segno, struct f2fs_sit_entry *raw_sit) { #ifdef CONFIG_F2FS_CHECK_FS @@ -607,11 +607,25 @@ static inline void check_block_count(struct f2fs_sb_info *sbi, cur_pos = next_pos; is_valid = !is_valid; } while (cur_pos < sbi->blocks_per_seg); - BUG_ON(GET_SIT_VBLOCKS(raw_sit) != valid_blocks); + + if (unlikely(GET_SIT_VBLOCKS(raw_sit) != valid_blocks)) { + f2fs_msg(sbi->sb, KERN_ERR, + "Mismatch valid blocks %d vs. %d", + GET_SIT_VBLOCKS(raw_sit), valid_blocks); + set_sbi_flag(sbi, SBI_NEED_FSCK); + return -EINVAL; + } #endif /* check segment usage, and check boundary of a given segment number */ - f2fs_bug_on(sbi, GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg - || segno > TOTAL_SEGS(sbi) - 1); + if (unlikely(GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg + || segno > TOTAL_SEGS(sbi) - 1)) { + f2fs_msg(sbi->sb, KERN_ERR, + "Wrong valid blocks %d or segno %u", + GET_SIT_VBLOCKS(raw_sit), segno); + set_sbi_flag(sbi, SBI_NEED_FSCK); + return -EINVAL; + } + return 0; } static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi, |