There is a report about csum item overlap, which makes newer btrfs
kernel to reject it due to tree-checker.
Now let btrfs-progs have the same ability to detect such problem.
Signed-off-by: Qu Wenruo <wqu@xxxxxxxx>
---
check/main.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/check/main.c b/check/main.c
index d02dd1636852..c526c72d158e 100644
--- a/check/main.c
+++ b/check/main.c
@@ -5893,6 +5893,7 @@ static int check_csums(struct btrfs_root *root)
struct btrfs_path path;
struct extent_buffer *leaf;
struct btrfs_key key;
+ u64 last_data_end = 0;
u64 offset = 0, num_bytes = 0;
u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy);
int errors = 0;
@@ -5952,6 +5953,13 @@ static int check_csums(struct btrfs_root *root)
continue;
}
+ if (key.offset < last_data_end) {
+ error(
+ "csum overlap, current bytenr=%llu prev_end=%llu, eb=%llu slot=%u",
+ key.offset, last_data_end, leaf->start,
+ path.slots[0]);
+ errors++;
+ }
data_len = (btrfs_item_size_nr(leaf, path.slots[0]) /
csum_size) * root->fs_info->sectorsize;
if (!verify_csum)
@@ -5982,6 +5990,7 @@ skip_csum_check:
num_bytes = 0;
}
num_bytes += data_len;
+ last_data_end = key.offset + data_len;
path.slots[0]++;
}
--
2.25.1
