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authorChao Yu <yuchao0@huawei.com>2017-01-07 18:51:01 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2017-02-22 18:48:49 -0800
commit355e78913c0d57492076d545b6f44b94fec2bf6b (patch)
treec5bc399e8028a25db606d67c92ceb1e1685bb037 /fs/f2fs/segment.h
parent5fe457430e554a2f5188f13c1a2e36ad845640c5 (diff)
f2fs: check in-memory block bitmap
This patch adds a mirror for valid block bitmap, and use it to detect in-memory bitmap corruption which may be caused by bit-transition of cache or memory overflow. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.h')
-rw-r--r--fs/f2fs/segment.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 08f1455c812c..9af95194db06 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -164,6 +164,9 @@ struct seg_entry {
unsigned int ckpt_valid_blocks:10; /* # of valid blocks last cp */
unsigned int padding:6; /* padding */
unsigned char *cur_valid_map; /* validity bitmap of blocks */
+#ifdef CONFIG_F2FS_CHECK_FS
+ unsigned char *cur_valid_map_mir; /* mirror of current valid bitmap */
+#endif
/*
* # of valid blocks and the validity bitmap stored in the the last
* checkpoint pack. This information is used by the SSR mode.
@@ -320,6 +323,9 @@ static inline void seg_info_from_raw_sit(struct seg_entry *se,
se->ckpt_valid_blocks = GET_SIT_VBLOCKS(rs);
memcpy(se->cur_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
+#ifdef CONFIG_F2FS_CHECK_FS
+ memcpy(se->cur_valid_map_mir, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
+#endif
se->type = GET_SIT_TYPE(rs);
se->mtime = le64_to_cpu(rs->mtime);
}