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btrfs: print-tree: print key types as human readable strings

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Looking at a leaf dump from the kernel's print-tree implementation is not
so friendly to analyze since key types are printed as numbers. Improve on
this by printing key types as strings that are a diminutive of the macro
names for key types, just like we do in btrfs-progs.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2025-09-15 16:23:04 +01:00 committed by David Sterba
parent 00b7eaaaa5
commit 26baec69ac
1 changed files with 66 additions and 2 deletions
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68
fs/btrfs/print-tree.c
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@ -13,6 +13,12 @@
#include "volumes.h"
#include "raid-stripe-tree.h"
/*
* Large enough buffer size for the stringification of any key type yet short
* enough to use the stack and avoid allocations.
*/
#define KEY_TYPE_BUF_SIZE 32
struct root_name_map {
u64 id;
const char *name;
@ -366,6 +372,60 @@ static void print_file_extent_item(const struct extent_buffer *eb, int i)
btrfs_file_extent_compression(eb, fi));
}
static void key_type_string(const struct btrfs_key *key, char *buf, int buf_size)
{
static const char *key_to_str[256] = {
[BTRFS_INODE_ITEM_KEY] = "INODE_ITEM",
[BTRFS_INODE_REF_KEY] = "INODE_REF",
[BTRFS_INODE_EXTREF_KEY] = "INODE_EXTREF",
[BTRFS_DIR_ITEM_KEY] = "DIR_ITEM",
[BTRFS_DIR_INDEX_KEY] = "DIR_INDEX",
[BTRFS_DIR_LOG_ITEM_KEY] = "DIR_LOG_ITEM",
[BTRFS_DIR_LOG_INDEX_KEY] = "DIR_LOG_INDEX",
[BTRFS_XATTR_ITEM_KEY] = "XATTR_ITEM",
[BTRFS_VERITY_DESC_ITEM_KEY] = "VERITY_DESC_ITEM",
[BTRFS_VERITY_MERKLE_ITEM_KEY] = "VERITY_MERKLE_ITEM",
[BTRFS_ORPHAN_ITEM_KEY] = "ORPHAN_ITEM",
[BTRFS_ROOT_ITEM_KEY] = "ROOT_ITEM",
[BTRFS_ROOT_REF_KEY] = "ROOT_REF",
[BTRFS_ROOT_BACKREF_KEY] = "ROOT_BACKREF",
[BTRFS_EXTENT_ITEM_KEY] = "EXTENT_ITEM",
[BTRFS_METADATA_ITEM_KEY] = "METADATA_ITEM",
[BTRFS_TREE_BLOCK_REF_KEY] = "TREE_BLOCK_REF",
[BTRFS_SHARED_BLOCK_REF_KEY] = "SHARED_BLOCK_REF",
[BTRFS_EXTENT_DATA_REF_KEY] = "EXTENT_DATA_REF",
[BTRFS_SHARED_DATA_REF_KEY] = "SHARED_DATA_REF",
[BTRFS_EXTENT_OWNER_REF_KEY] = "EXTENT_OWNER_REF",
[BTRFS_EXTENT_CSUM_KEY] = "EXTENT_CSUM",
[BTRFS_EXTENT_DATA_KEY] = "EXTENT_DATA",
[BTRFS_BLOCK_GROUP_ITEM_KEY] = "BLOCK_GROUP_ITEM",
[BTRFS_FREE_SPACE_INFO_KEY] = "FREE_SPACE_INFO",
[BTRFS_FREE_SPACE_EXTENT_KEY] = "FREE_SPACE_EXTENT",
[BTRFS_FREE_SPACE_BITMAP_KEY] = "FREE_SPACE_BITMAP",
[BTRFS_CHUNK_ITEM_KEY] = "CHUNK_ITEM",
[BTRFS_DEV_ITEM_KEY] = "DEV_ITEM",
[BTRFS_DEV_EXTENT_KEY] = "DEV_EXTENT",
[BTRFS_TEMPORARY_ITEM_KEY] = "TEMPORARY_ITEM",
[BTRFS_DEV_REPLACE_KEY] = "DEV_REPLACE",
[BTRFS_STRING_ITEM_KEY] = "STRING_ITEM",
[BTRFS_QGROUP_STATUS_KEY] = "QGROUP_STATUS",
[BTRFS_QGROUP_RELATION_KEY] = "QGROUP_RELATION",
[BTRFS_QGROUP_INFO_KEY] = "QGROUP_INFO",
[BTRFS_QGROUP_LIMIT_KEY] = "QGROUP_LIMIT",
[BTRFS_PERSISTENT_ITEM_KEY] = "PERSISTENT_ITEM",
[BTRFS_UUID_KEY_SUBVOL] = "UUID_KEY_SUBVOL",
[BTRFS_UUID_KEY_RECEIVED_SUBVOL] = "UUID_KEY_RECEIVED_SUBVOL",
[BTRFS_RAID_STRIPE_KEY] = "RAID_STRIPE",
};
if (key->type == 0 && key->objectid == BTRFS_FREE_SPACE_OBJECTID)
scnprintf(buf, buf_size, "UNTYPED");
else if (key_to_str[key->type])
scnprintf(buf, buf_size, key_to_str[key->type]);
else
scnprintf(buf, buf_size, "UNKNOWN.%d", key->type);
}
void btrfs_print_leaf(const struct extent_buffer *l)
{
struct btrfs_fs_info *fs_info;
@ -390,10 +450,14 @@ void btrfs_print_leaf(const struct extent_buffer *l)
btrfs_leaf_free_space(l), btrfs_header_owner(l));
print_eb_refs_lock(l);
for (i = 0 ; i < nr ; i++) {
char key_buf[KEY_TYPE_BUF_SIZE];
btrfs_item_key_to_cpu(l, &key, i);
type = key.type;
pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
i, key.objectid, type, key.offset,
key_type_string(&key, key_buf, KEY_TYPE_BUF_SIZE);
pr_info("\titem %d key (%llu %s %llu) itemoff %d itemsize %d\n",
i, key.objectid, key_buf, key.offset,
btrfs_item_offset(l, i), btrfs_item_size(l, i));
switch (type) {
case BTRFS_INODE_ITEM_KEY: