f2fs: introduce and spread verify_blkaddr
This patch introduces verify_blkaddr to check meta/data block address
with valid range to detect bug earlier.
In addition, once we encounter an invalid blkaddr, notice user to run
fsck to fix, and let the kernel panic.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index e5cf2ff..9455228 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -120,7 +120,7 @@ struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
return __get_meta_page(sbi, index, false);
}
-bool f2fs_is_valid_meta_blkaddr(struct f2fs_sb_info *sbi,
+bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
block_t blkaddr, int type)
{
switch (type) {
@@ -141,10 +141,16 @@ bool f2fs_is_valid_meta_blkaddr(struct f2fs_sb_info *sbi,
return false;
break;
case META_POR:
+ case DATA_GENERIC:
if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
blkaddr < MAIN_BLKADDR(sbi)))
return false;
break;
+ case META_GENERIC:
+ if (unlikely(blkaddr < SEG0_BLKADDR(sbi) ||
+ blkaddr >= MAIN_BLKADDR(sbi)))
+ return false;
+ break;
default:
BUG();
}
@@ -177,7 +183,7 @@ int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
blk_start_plug(&plug);
for (; nrpages-- > 0; blkno++) {
- if (!f2fs_is_valid_meta_blkaddr(sbi, blkno, type))
+ if (!f2fs_is_valid_blkaddr(sbi, blkno, type))
goto out;
switch (type) {