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-rw-r--r--fs/f2fs/segment.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 5f6e4cd2eff2..a034e0da004a 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -4239,6 +4239,41 @@ static int build_dirty_segmap(struct f2fs_sb_info *sbi)
return init_victim_secmap(sbi);
}
+static int sanity_check_curseg(struct f2fs_sb_info *sbi)
+{
+ int i;
+
+ /*
+ * In LFS/SSR curseg, .next_blkoff should point to an unused blkaddr;
+ * In LFS curseg, all blkaddr after .next_blkoff should be unused.
+ */
+ for (i = 0; i < NO_CHECK_TYPE; i++) {
+ struct curseg_info *curseg = CURSEG_I(sbi, i);
+ struct seg_entry *se = get_seg_entry(sbi, curseg->segno);
+ unsigned int blkofs = curseg->next_blkoff;
+
+ if (f2fs_test_bit(blkofs, se->cur_valid_map))
+ goto out;
+
+ if (curseg->alloc_type == SSR)
+ continue;
+
+ for (blkofs += 1; blkofs < sbi->blocks_per_seg; blkofs++) {
+ if (!f2fs_test_bit(blkofs, se->cur_valid_map))
+ continue;
+out:
+ f2fs_msg(sbi->sb, KERN_ERR,
+ "Current segment's next free block offset is "
+ "inconsistent with bitmap, logtype:%u, "
+ "segno:%u, type:%u, next_blkoff:%u, blkofs:%u",
+ i, curseg->segno, curseg->alloc_type,
+ curseg->next_blkoff, blkofs);
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
/*
* Update min, max modified time for cost-benefit GC algorithm
*/
@@ -4334,6 +4369,10 @@ int f2fs_build_segment_manager(struct f2fs_sb_info *sbi)
if (err)
return err;
+ err = sanity_check_curseg(sbi);
+ if (err)
+ return err;
+
init_min_max_mtime(sbi);
return 0;
}