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authorChao Yu <yuchao0@huawei.com>2017-01-07 18:52:01 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2017-02-22 18:48:49 -0800
commit599a09b2c1ac222e6aad0c22515d1ccde7c3b702 (patch)
tree55d398c8c0c971edf8f31e7be9d811e93b199801 /fs/f2fs/node.h
parent355e78913c0d57492076d545b6f44b94fec2bf6b (diff)
downloadlinux-599a09b2c1ac222e6aad0c22515d1ccde7c3b702.tar.bz2
f2fs: check in-memory nat version bitmap
This patch adds a mirror for nat version 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/node.h')
-rw-r--r--fs/f2fs/node.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 9278b21ee073..29ff783eb9c3 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -186,6 +186,12 @@ static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr)
{
struct f2fs_nm_info *nm_i = NM_I(sbi);
+
+#ifdef CONFIG_F2FS_CHECK_FS
+ if (memcmp(nm_i->nat_bitmap, nm_i->nat_bitmap_mir,
+ nm_i->bitmap_size))
+ f2fs_bug_on(sbi, 1);
+#endif
memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size);
}
@@ -203,6 +209,12 @@ static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start)
(seg_off << sbi->log_blocks_per_seg << 1) +
(block_off & (sbi->blocks_per_seg - 1)));
+#ifdef CONFIG_F2FS_CHECK_FS
+ if (f2fs_test_bit(block_off, nm_i->nat_bitmap) !=
+ f2fs_test_bit(block_off, nm_i->nat_bitmap_mir))
+ f2fs_bug_on(sbi, 1);
+#endif
+
if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
block_addr += sbi->blocks_per_seg;
@@ -228,6 +240,9 @@ static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);
f2fs_change_bit(block_off, nm_i->nat_bitmap);
+#ifdef CONFIG_F2FS_CHECK_FS
+ f2fs_change_bit(block_off, nm_i->nat_bitmap_mir);
+#endif
}
static inline nid_t ino_of_node(struct page *node_page)