Commit 26baec69 authored by Filipe Manana's avatar Filipe Manana Committed by David Sterba
Browse files

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



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: default avatarQu Wenruo <wqu@suse.com>
Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: default avatarFilipe Manana <fdmanana@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 00b7eaaa

fs/btrfs/print-tree.c

+66 −2
Original line number Diff line number Diff line
@@ -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: