Re: [PATCH] btrfs-progs: print the csum length in debug-tree
From: Nikolay Borisov <hidden>
Date: 2017-08-25 13:48:46
On 25.08.2017 16:13, josef@toxicpanda.com wrote:
quoted hunk ↗ jump to hunk
From: Josef Bacik <redacted> While looking at a log of a corrupted fs I needed to verify we were missing csums for a given range. Make this easier by printing out how many bytes a csum extent item represents when using btrfs_debug_tree. Signed-off-by: Josef Bacik <redacted> --- print-tree.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)diff --git a/print-tree.c b/print-tree.c index 5927ed3..a124c96 100644 --- a/print-tree.c +++ b/print-tree.c@@ -1103,9 +1103,15 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *eb) case BTRFS_CSUM_ITEM_KEY: printf("\t\tcsum item\n"); break; - case BTRFS_EXTENT_CSUM_KEY: - printf("\t\textent csum item\n"); + case BTRFS_EXTENT_CSUM_KEY: { + u16 csum_size = + btrfs_super_csum_size(root->fs_info->super_copy); + u32 size = (item_size / csum_size) * + root->fs_info->sectorsize; + printf("\t\textent csum item bytes %lu\n", + (unsigned long)size);
Currently for a csum item we get: item 0 key (EXTENT_CSUM EXTENT_CSUM 1103101952) itemoff 16279 itemsize 4 extent csum item Why don't you go one step further and print the covered range - it would be key.offset + size (the number you've calculated) And so you can print something like: item 0 key (EXTENT_CSUM EXTENT_CSUM 1103101952) itemoff 16279 itemsize 4 extent csum item 1103101952-1103106048 "extent csum item range %llu-%lly\n", key.offset, key.offset + size
break; + } case BTRFS_EXTENT_DATA_KEY: print_file_extent_item(eb, item, i, ptr); break;