[PATCH] dump.f2fs: check block is valid or not before dump block info

[Yunlei He <heyunlei@huawei.com>]

This patch add a block validate check in dump.f2fs

Signed-off-by: Yunlei He <heyunlei@huawei.com>
---
 fsck/dump.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/fsck/dump.c b/fsck/dump.c
index 22e2265..a33969c 100644
--- a/fsck/dump.c
+++ b/fsck/dump.c
@@ -507,6 +507,9 @@ int dump_info_from_blkaddr(struct f2fs_sb_info *sbi, u32 blk_addr)
 	int type;
 	struct f2fs_summary sum_entry;
 	struct node_info ni, ino_ni;
+	struct seg_entry * seg;
+	unsigned int segno;
+	u32 offset;
 	int ret = 0;
 
 	MSG(0, "\n== Dump data from block address ==\n\n");
@@ -538,6 +541,16 @@ int dump_info_from_blkaddr(struct f2fs_sb_info *sbi, u32 blk_addr)
 		return ret;
 	}
 
+	segno = GET_SEGNO(sbi, blk_addr);
+	offset = OFFSET_IN_SEG(sbi, blk_addr);
+	seg = get_seg_entry(sbi, segno);
+	if (f2fs_test_bit(offset, (const char *)seg->cur_valid_map)) {
+		MSG(0, "\nblk_addr: 0x%x is valid block\n", blk_addr);
+	} else {
+		MSG(0, "\nblk_addr: 0x%x is not valid block\n", blk_addr);
+		return ret;
+	}
+
 	type = get_sum_entry(sbi, blk_addr, &sum_entry);
 	nid = le32_to_cpu(sum_entry.nid);
 
@@ -545,8 +558,8 @@ int dump_info_from_blkaddr(struct f2fs_sb_info *sbi, u32 blk_addr)
 
 	DBG(1, "Note: blkaddr = main_blkaddr + segno * 512 + offset\n");
 	DBG(1, "Block_addr            [0x%x]\n", blk_addr);
-	DBG(1, " - Segno              [0x%x]\n", GET_SEGNO(sbi, blk_addr));
-	DBG(1, " - Offset             [0x%x]\n", OFFSET_IN_SEG(sbi, blk_addr));
+	DBG(1, " - Segno              [0x%x]\n", segno);
+	DBG(1, " - Offset             [0x%x]\n", offset);
 	DBG(1, "SUM.nid               [0x%x]\n", nid);
 	DBG(1, "SUM.type              [%s]\n", type >= 0 ?
 						seg_type_name[type] :
-- 
1.9.1


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