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authorJaegeuk Kim <jaegeuk@kernel.org>2017-12-19 19:16:34 -0800
committerJaegeuk Kim <jaegeuk@kernel.org>2018-01-02 19:27:31 -0800
commitc39a1b348c4fe172729eff77c533dabc3c7cdaa7 (patch)
treebe649bb5ee7fd4bbfe5b37647080826e60f7d27f /fs/f2fs
parent211a6fa04c56e8c57faca245880148bcb6419073 (diff)
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f2fs: return error during fill_super
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>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/segment.c16
-rw-r--r--fs/f2fs/segment.h22
2 files changed, 30 insertions, 8 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 40e1d20b8080..b03f65e5dfdc 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -3476,7 +3476,7 @@ 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);
@@ -3486,6 +3486,7 @@ static void build_sit_entries(struct f2fs_sb_info *sbi)
int sit_blk_cnt = SIT_BLK_CNT(sbi);
unsigned int i, start, end;
unsigned int readed, start_blk = 0;
+ int err = 0;
do {
readed = ra_meta_pages(sbi, start_blk, BIO_MAX_PAGES,
@@ -3504,7 +3505,9 @@ 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 */
@@ -3539,7 +3542,9 @@ 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);
if (f2fs_discard_en(sbi)) {
@@ -3559,6 +3564,7 @@ static void build_sit_entries(struct f2fs_sb_info *sbi)
se->valid_blocks - old_valid_blocks;
}
up_read(&curseg->journal_rwsem);
+ return err;
}
static void init_free_segmap(struct f2fs_sb_info *sbi)
@@ -3733,7 +3739,9 @@ 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 d1d394cdf61d..71a2aaa286df 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -655,7 +655,7 @@ 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
@@ -677,11 +677,25 @@ 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,