[mirror_ubuntu-jammy-kernel.git] / fs / btrfs / print-tree.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2007 Oracle.  All rights reserved.
 */

#include "ctree.h"
#include "disk-io.h"
#include "print-tree.h"

struct root_name_map {
	u64 id;
	char name[16];
};

static const struct root_name_map root_map[] = {
	{ BTRFS_ROOT_TREE_OBJECTID,		"ROOT_TREE"		},
	{ BTRFS_EXTENT_TREE_OBJECTID,		"EXTENT_TREE"		},
	{ BTRFS_CHUNK_TREE_OBJECTID,		"CHUNK_TREE"		},
	{ BTRFS_DEV_TREE_OBJECTID,		"DEV_TREE"		},
	{ BTRFS_FS_TREE_OBJECTID,		"FS_TREE"		},
	{ BTRFS_CSUM_TREE_OBJECTID,		"CSUM_TREE"		},
	{ BTRFS_TREE_LOG_OBJECTID,		"TREE_LOG"		},
	{ BTRFS_QUOTA_TREE_OBJECTID,		"QUOTA_TREE"		},
	{ BTRFS_UUID_TREE_OBJECTID,		"UUID_TREE"		},
	{ BTRFS_FREE_SPACE_TREE_OBJECTID,	"FREE_SPACE_TREE"	},
	{ BTRFS_DATA_RELOC_TREE_OBJECTID,	"DATA_RELOC_TREE"	},
};

const char *btrfs_root_name(const struct btrfs_key *key, char *buf)
{
	int i;

	if (key->objectid == BTRFS_TREE_RELOC_OBJECTID) {
		snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN,
			 "TREE_RELOC offset=%llu", key->offset);
		return buf;
	}

	for (i = 0; i < ARRAY_SIZE(root_map); i++) {
		if (root_map[i].id == key->objectid)
			return root_map[i].name;
	}

	snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, "%llu", key->objectid);
	return buf;
}

static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
{
	int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
	int i;
	pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
	       btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
	       btrfs_chunk_type(eb, chunk), num_stripes);
	for (i = 0 ; i < num_stripes ; i++) {
		pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i,
		      btrfs_stripe_devid_nr(eb, chunk, i),
		      btrfs_stripe_offset_nr(eb, chunk, i));
	}
}
static void print_dev_item(struct extent_buffer *eb,
			   struct btrfs_dev_item *dev_item)
{
	pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n",
	       btrfs_device_id(eb, dev_item),
	       btrfs_device_total_bytes(eb, dev_item),
	       btrfs_device_bytes_used(eb, dev_item));
}
static void print_extent_data_ref(struct extent_buffer *eb,
				  struct btrfs_extent_data_ref *ref)
{
	pr_cont("extent data backref root %llu objectid %llu offset %llu count %u\n",
	       btrfs_extent_data_ref_root(eb, ref),
	       btrfs_extent_data_ref_objectid(eb, ref),
	       btrfs_extent_data_ref_offset(eb, ref),
	       btrfs_extent_data_ref_count(eb, ref));
}

static void print_extent_item(struct extent_buffer *eb, int slot, int type)
{
	struct btrfs_extent_item *ei;
	struct btrfs_extent_inline_ref *iref;
	struct btrfs_extent_data_ref *dref;
	struct btrfs_shared_data_ref *sref;
	struct btrfs_disk_key key;
	unsigned long end;
	unsigned long ptr;
	u32 item_size = btrfs_item_size_nr(eb, slot);
	u64 flags;
	u64 offset;
	int ref_index = 0;

	if (unlikely(item_size < sizeof(*ei))) {
		btrfs_print_v0_err(eb->fs_info);
		btrfs_handle_fs_error(eb->fs_info, -EINVAL, NULL);
	}

	ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
	flags = btrfs_extent_flags(eb, ei);

	pr_info("\t\textent refs %llu gen %llu flags %llu\n",
	       btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
	       flags);

	if ((type == BTRFS_EXTENT_ITEM_KEY) &&
	    flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
		struct btrfs_tree_block_info *info;
		info = (struct btrfs_tree_block_info *)(ei + 1);
		btrfs_tree_block_key(eb, info, &key);
		pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
		       btrfs_disk_key_objectid(&key), key.type,
		       btrfs_disk_key_offset(&key),
		       btrfs_tree_block_level(eb, info));
		iref = (struct btrfs_extent_inline_ref *)(info + 1);
	} else {
		iref = (struct btrfs_extent_inline_ref *)(ei + 1);
	}

	ptr = (unsigned long)iref;
	end = (unsigned long)ei + item_size;
	while (ptr < end) {
		iref = (struct btrfs_extent_inline_ref *)ptr;
		type = btrfs_extent_inline_ref_type(eb, iref);
		offset = btrfs_extent_inline_ref_offset(eb, iref);
		pr_info("\t\tref#%d: ", ref_index++);
		switch (type) {
		case BTRFS_TREE_BLOCK_REF_KEY:
			pr_cont("tree block backref root %llu\n", offset);
			break;
		case BTRFS_SHARED_BLOCK_REF_KEY:
			pr_cont("shared block backref parent %llu\n", offset);
			/*
			 * offset is supposed to be a tree block which
			 * must be aligned to nodesize.
			 */
			if (!IS_ALIGNED(offset, eb->fs_info->sectorsize))
				pr_info(
			"\t\t\t(parent %llu not aligned to sectorsize %u)\n",
					offset, eb->fs_info->sectorsize);
			break;
		case BTRFS_EXTENT_DATA_REF_KEY:
			dref = (struct btrfs_extent_data_ref *)(&iref->offset);
			print_extent_data_ref(eb, dref);
			break;
		case BTRFS_SHARED_DATA_REF_KEY:
			sref = (struct btrfs_shared_data_ref *)(iref + 1);
			pr_cont("shared data backref parent %llu count %u\n",
			       offset, btrfs_shared_data_ref_count(eb, sref));
			/*
			 * offset is supposed to be a tree block which
			 * must be aligned to nodesize.
			 */
			if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
				pr_info(
			"\t\t\t(parent %llu not aligned to sectorsize %u)\n",
				     offset, eb->fs_info->sectorsize);
			break;
		default:
			pr_cont("(extent %llu has INVALID ref type %d)\n",
				  eb->start, type);
			return;
		}
		ptr += btrfs_extent_inline_ref_size(type);
	}
	WARN_ON(ptr > end);
}

static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
			    u32 item_size)
{
	if (!IS_ALIGNED(item_size, sizeof(u64))) {
		pr_warn("BTRFS: uuid item with illegal size %lu!\n",
			(unsigned long)item_size);
		return;
	}
	while (item_size) {
		__le64 subvol_id;

		read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
		pr_info("\t\tsubvol_id %llu\n", le64_to_cpu(subvol_id));
		item_size -= sizeof(u64);
		offset += sizeof(u64);
	}
}

/*
 * Helper to output refs and locking status of extent buffer.  Useful to debug
 * race condition related problems.
 */
static void print_eb_refs_lock(struct extent_buffer *eb)
{
#ifdef CONFIG_BTRFS_DEBUG
	btrfs_info(eb->fs_info, "refs %u lock_owner %u current %u",
		   atomic_read(&eb->refs), eb->lock_owner, current->pid);
#endif
}

void btrfs_print_leaf(struct extent_buffer *l)
{
	struct btrfs_fs_info *fs_info;
	int i;
	u32 type, nr;
	struct btrfs_item *item;
	struct btrfs_root_item *ri;
	struct btrfs_dir_item *di;
	struct btrfs_inode_item *ii;
	struct btrfs_block_group_item *bi;
	struct btrfs_file_extent_item *fi;
	struct btrfs_extent_data_ref *dref;
	struct btrfs_shared_data_ref *sref;
	struct btrfs_dev_extent *dev_extent;
	struct btrfs_key key;
	struct btrfs_key found_key;

	if (!l)
		return;

	fs_info = l->fs_info;
	nr = btrfs_header_nritems(l);

	btrfs_info(fs_info,
		   "leaf %llu gen %llu total ptrs %d free space %d owner %llu",
		   btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
		   btrfs_leaf_free_space(l), btrfs_header_owner(l));
	print_eb_refs_lock(l);
	for (i = 0 ; i < nr ; i++) {
		item = btrfs_item_nr(i);
		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,
			btrfs_item_offset(l, item), btrfs_item_size(l, item));
		switch (type) {
		case BTRFS_INODE_ITEM_KEY:
			ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
			pr_info("\t\tinode generation %llu size %llu mode %o\n",
			       btrfs_inode_generation(l, ii),
			       btrfs_inode_size(l, ii),
			       btrfs_inode_mode(l, ii));
			break;
		case BTRFS_DIR_ITEM_KEY:
			di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
			btrfs_dir_item_key_to_cpu(l, di, &found_key);
			pr_info("\t\tdir oid %llu type %u\n",
				found_key.objectid,
				btrfs_dir_type(l, di));
			break;
		case BTRFS_ROOT_ITEM_KEY:
			ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
			pr_info("\t\troot data bytenr %llu refs %u\n",
				btrfs_disk_root_bytenr(l, ri),
				btrfs_disk_root_refs(l, ri));
			break;
		case BTRFS_EXTENT_ITEM_KEY:
		case BTRFS_METADATA_ITEM_KEY:
			print_extent_item(l, i, type);
			break;
		case BTRFS_TREE_BLOCK_REF_KEY:
			pr_info("\t\ttree block backref\n");
			break;
		case BTRFS_SHARED_BLOCK_REF_KEY:
			pr_info("\t\tshared block backref\n");
			break;
		case BTRFS_EXTENT_DATA_REF_KEY:
			dref = btrfs_item_ptr(l, i,
					      struct btrfs_extent_data_ref);
			print_extent_data_ref(l, dref);
			break;
		case BTRFS_SHARED_DATA_REF_KEY:
			sref = btrfs_item_ptr(l, i,
					      struct btrfs_shared_data_ref);
			pr_info("\t\tshared data backref count %u\n",
			       btrfs_shared_data_ref_count(l, sref));
			break;
		case BTRFS_EXTENT_DATA_KEY:
			fi = btrfs_item_ptr(l, i,
					    struct btrfs_file_extent_item);
			if (btrfs_file_extent_type(l, fi) ==
			    BTRFS_FILE_EXTENT_INLINE) {
				pr_info("\t\tinline extent data size %llu\n",
				       btrfs_file_extent_ram_bytes(l, fi));
				break;
			}
			pr_info("\t\textent data disk bytenr %llu nr %llu\n",
			       btrfs_file_extent_disk_bytenr(l, fi),
			       btrfs_file_extent_disk_num_bytes(l, fi));
			pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
			       btrfs_file_extent_offset(l, fi),
			       btrfs_file_extent_num_bytes(l, fi),
			       btrfs_file_extent_ram_bytes(l, fi));
			break;
		case BTRFS_EXTENT_REF_V0_KEY:
			btrfs_print_v0_err(fs_info);
			btrfs_handle_fs_error(fs_info, -EINVAL, NULL);
			break;
		case BTRFS_BLOCK_GROUP_ITEM_KEY:
			bi = btrfs_item_ptr(l, i,
					    struct btrfs_block_group_item);
			pr_info(
		   "\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
				btrfs_block_group_used(l, bi),
				btrfs_block_group_chunk_objectid(l, bi),
				btrfs_block_group_flags(l, bi));
			break;
		case BTRFS_CHUNK_ITEM_KEY:
			print_chunk(l, btrfs_item_ptr(l, i,
						      struct btrfs_chunk));
			break;
		case BTRFS_DEV_ITEM_KEY:
			print_dev_item(l, btrfs_item_ptr(l, i,
					struct btrfs_dev_item));
			break;
		case BTRFS_DEV_EXTENT_KEY:
			dev_extent = btrfs_item_ptr(l, i,
						    struct btrfs_dev_extent);
			pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
			       btrfs_dev_extent_chunk_tree(l, dev_extent),
			       btrfs_dev_extent_chunk_objectid(l, dev_extent),
			       btrfs_dev_extent_chunk_offset(l, dev_extent),
			       btrfs_dev_extent_length(l, dev_extent));
			break;
		case BTRFS_PERSISTENT_ITEM_KEY:
			pr_info("\t\tpersistent item objectid %llu offset %llu\n",
					key.objectid, key.offset);
			switch (key.objectid) {
			case BTRFS_DEV_STATS_OBJECTID:
				pr_info("\t\tdevice stats\n");
				break;
			default:
				pr_info("\t\tunknown persistent item\n");
			}
			break;
		case BTRFS_TEMPORARY_ITEM_KEY:
			pr_info("\t\ttemporary item objectid %llu offset %llu\n",
					key.objectid, key.offset);
			switch (key.objectid) {
			case BTRFS_BALANCE_OBJECTID:
				pr_info("\t\tbalance status\n");
				break;
			default:
				pr_info("\t\tunknown temporary item\n");
			}
			break;
		case BTRFS_DEV_REPLACE_KEY:
			pr_info("\t\tdev replace\n");
			break;
		case BTRFS_UUID_KEY_SUBVOL:
		case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
			print_uuid_item(l, btrfs_item_ptr_offset(l, i),
					btrfs_item_size_nr(l, i));
			break;
		}
	}
}

void btrfs_print_tree(struct extent_buffer *c, bool follow)
{
	struct btrfs_fs_info *fs_info;
	int i; u32 nr;
	struct btrfs_key key;
	int level;

	if (!c)
		return;
	fs_info = c->fs_info;
	nr = btrfs_header_nritems(c);
	level = btrfs_header_level(c);
	if (level == 0) {
		btrfs_print_leaf(c);
		return;
	}
	btrfs_info(fs_info,
		   "node %llu level %d gen %llu total ptrs %d free spc %u owner %llu",
		   btrfs_header_bytenr(c), level, btrfs_header_generation(c),
		   nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr,
		   btrfs_header_owner(c));
	print_eb_refs_lock(c);
	for (i = 0; i < nr; i++) {
		btrfs_node_key_to_cpu(c, &key, i);
		pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n",
		       i, key.objectid, key.type, key.offset,
		       btrfs_node_blockptr(c, i),
		       btrfs_node_ptr_generation(c, i));
	}
	if (!follow)
		return;
	for (i = 0; i < nr; i++) {
		struct btrfs_key first_key;
		struct extent_buffer *next;

		btrfs_node_key_to_cpu(c, &first_key, i);
		next = read_tree_block(fs_info, btrfs_node_blockptr(c, i),
				       btrfs_header_owner(c),
				       btrfs_node_ptr_generation(c, i),
				       level - 1, &first_key);
		if (IS_ERR(next)) {
			continue;
		} else if (!extent_buffer_uptodate(next)) {
			free_extent_buffer(next);
			continue;
		}

		if (btrfs_is_leaf(next) &&
		   level != 1)
			BUG();
		if (btrfs_header_level(next) !=
		       level - 1)
			BUG();
		btrfs_print_tree(next, follow);
		free_extent_buffer(next);
	}
}
Commit	Line	Data
c1d7c514	1	// SPDX-License-Identifier: GPL-2.0
6cbd5570 CM	2	/*
6cbd5570 CM	3	* Copyright (C) 2007 Oracle. All rights reserved.
6cbd5570 CM	4	*/
6cbd5570 CM	5
5de08d7d CM	6	#include "ctree.h"
5de08d7d CM	7	#include "disk-io.h"
35b7e476	8	#include "print-tree.h"
5de08d7d	9
457f1864 JB	10	struct root_name_map {
	11	u64 id;
	12	char name[16];
	13	};
	14
	15	static const struct root_name_map root_map[] = {
	16	{ BTRFS_ROOT_TREE_OBJECTID, "ROOT_TREE" },
	17	{ BTRFS_EXTENT_TREE_OBJECTID, "EXTENT_TREE" },
	18	{ BTRFS_CHUNK_TREE_OBJECTID, "CHUNK_TREE" },
	19	{ BTRFS_DEV_TREE_OBJECTID, "DEV_TREE" },
	20	{ BTRFS_FS_TREE_OBJECTID, "FS_TREE" },
	21	{ BTRFS_CSUM_TREE_OBJECTID, "CSUM_TREE" },
	22	{ BTRFS_TREE_LOG_OBJECTID, "TREE_LOG" },
	23	{ BTRFS_QUOTA_TREE_OBJECTID, "QUOTA_TREE" },
	24	{ BTRFS_UUID_TREE_OBJECTID, "UUID_TREE" },
	25	{ BTRFS_FREE_SPACE_TREE_OBJECTID, "FREE_SPACE_TREE" },
	26	{ BTRFS_DATA_RELOC_TREE_OBJECTID, "DATA_RELOC_TREE" },
	27	};
	28
71008734	29	const char btrfs_root_name(const struct btrfs_key key, char *buf)
457f1864 JB	30	{
	31	int i;
	32
71008734	33	if (key->objectid == BTRFS_TREE_RELOC_OBJECTID) {
457f1864	34	snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN,
71008734	35	"TREE_RELOC offset=%llu", key->offset);
457f1864 JB	36	return buf;
	37	}
	38
	39	for (i = 0; i < ARRAY_SIZE(root_map); i++) {
71008734	40	if (root_map[i].id == key->objectid)
457f1864 JB	41	return root_map[i].name;
	42	}
	43
71008734	44	snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, "%llu", key->objectid);
457f1864 JB	45	return buf;
	46	}
	47
0b86a832 CM	48	static void print_chunk(struct extent_buffer eb, struct btrfs_chunk chunk)
	49	{
	50	int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
	51	int i;
62e85577	52	pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
c1c9ff7c GU	53	btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
c1c9ff7c GU	54	btrfs_chunk_type(eb, chunk), num_stripes);
0b86a832	55	for (i = 0 ; i < num_stripes ; i++) {
62e85577	56	pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i,
c1c9ff7c GU	57	btrfs_stripe_devid_nr(eb, chunk, i),
c1c9ff7c GU	58	btrfs_stripe_offset_nr(eb, chunk, i));
0b86a832 CM	59	}
	60	}
	61	static void print_dev_item(struct extent_buffer *eb,
	62	struct btrfs_dev_item *dev_item)
	63	{
62e85577	64	pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n",
c1c9ff7c GU	65	btrfs_device_id(eb, dev_item),
	66	btrfs_device_total_bytes(eb, dev_item),
	67	btrfs_device_bytes_used(eb, dev_item));
0b86a832	68	}
5d4f98a2 YZ	69	static void print_extent_data_ref(struct extent_buffer *eb,
	70	struct btrfs_extent_data_ref *ref)
	71	{
64ecdb64	72	pr_cont("extent data backref root %llu objectid %llu offset %llu count %u\n",
c1c9ff7c GU	73	btrfs_extent_data_ref_root(eb, ref),
	74	btrfs_extent_data_ref_objectid(eb, ref),
	75	btrfs_extent_data_ref_offset(eb, ref),
5d4f98a2 YZ	76	btrfs_extent_data_ref_count(eb, ref));
	77	}
	78
be2c765d	79	static void print_extent_item(struct extent_buffer *eb, int slot, int type)
5d4f98a2 YZ	80	{
	81	struct btrfs_extent_item *ei;
	82	struct btrfs_extent_inline_ref *iref;
	83	struct btrfs_extent_data_ref *dref;
	84	struct btrfs_shared_data_ref *sref;
	85	struct btrfs_disk_key key;
	86	unsigned long end;
	87	unsigned long ptr;
5d4f98a2 YZ	88	u32 item_size = btrfs_item_size_nr(eb, slot);
	89	u64 flags;
	90	u64 offset;
64ecdb64	91	int ref_index = 0;
5d4f98a2	92
6d8ff4e4	93	if (unlikely(item_size < sizeof(*ei))) {
ba3c2b19 NB	94	btrfs_print_v0_err(eb->fs_info);
	95	btrfs_handle_fs_error(eb->fs_info, -EINVAL, NULL);
	96	}
5d4f98a2 YZ	97
	98	ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
	99	flags = btrfs_extent_flags(eb, ei);
	100
62e85577	101	pr_info("\t\textent refs %llu gen %llu flags %llu\n",
c1c9ff7c GU	102	btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
c1c9ff7c GU	103	flags);
5d4f98a2	104
be2c765d JB	105	if ((type == BTRFS_EXTENT_ITEM_KEY) &&
be2c765d JB	106	flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
5d4f98a2 YZ	107	struct btrfs_tree_block_info *info;
	108	info = (struct btrfs_tree_block_info *)(ei + 1);
	109	btrfs_tree_block_key(eb, info, &key);
62e85577	110	pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
c1c9ff7c GU	111	btrfs_disk_key_objectid(&key), key.type,
c1c9ff7c GU	112	btrfs_disk_key_offset(&key),
5d4f98a2 YZ	113	btrfs_tree_block_level(eb, info));
	114	iref = (struct btrfs_extent_inline_ref *)(info + 1);
	115	} else {
	116	iref = (struct btrfs_extent_inline_ref *)(ei + 1);
	117	}
	118
	119	ptr = (unsigned long)iref;
	120	end = (unsigned long)ei + item_size;
	121	while (ptr < end) {
	122	iref = (struct btrfs_extent_inline_ref *)ptr;
	123	type = btrfs_extent_inline_ref_type(eb, iref);
	124	offset = btrfs_extent_inline_ref_offset(eb, iref);
64ecdb64	125	pr_info("\t\tref#%d: ", ref_index++);
5d4f98a2 YZ	126	switch (type) {
5d4f98a2 YZ	127	case BTRFS_TREE_BLOCK_REF_KEY:
64ecdb64	128	pr_cont("tree block backref root %llu\n", offset);
5d4f98a2 YZ	129	break;
5d4f98a2 YZ	130	case BTRFS_SHARED_BLOCK_REF_KEY:
64ecdb64 LB	131	pr_cont("shared block backref parent %llu\n", offset);
	132	/*
	133	* offset is supposed to be a tree block which
	134	* must be aligned to nodesize.
	135	*/
ea57788e QW	136	if (!IS_ALIGNED(offset, eb->fs_info->sectorsize))
	137	pr_info(
	138	"\t\t\t(parent %llu not aligned to sectorsize %u)\n",
	139	offset, eb->fs_info->sectorsize);
5d4f98a2 YZ	140	break;
	141	case BTRFS_EXTENT_DATA_REF_KEY:
	142	dref = (struct btrfs_extent_data_ref *)(&iref->offset);
	143	print_extent_data_ref(eb, dref);
	144	break;
	145	case BTRFS_SHARED_DATA_REF_KEY:
	146	sref = (struct btrfs_shared_data_ref *)(iref + 1);
64ecdb64	147	pr_cont("shared data backref parent %llu count %u\n",
c1c9ff7c	148	offset, btrfs_shared_data_ref_count(eb, sref));
64ecdb64 LB	149	/*
	150	* offset is supposed to be a tree block which
	151	* must be aligned to nodesize.
	152	*/
	153	if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
ea57788e QW	154	pr_info(
	155	"\t\t\t(parent %llu not aligned to sectorsize %u)\n",
	156	offset, eb->fs_info->sectorsize);
5d4f98a2 YZ	157	break;
5d4f98a2 YZ	158	default:
64ecdb64	159	pr_cont("(extent %llu has INVALID ref type %d)\n",
07638ea5 LB	160	eb->start, type);
07638ea5 LB	161	return;
5d4f98a2 YZ	162	}
	163	ptr += btrfs_extent_inline_ref_size(type);
	164	}
	165	WARN_ON(ptr > end);
	166	}
	167
8f8ae8e2 SB	168	static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
	169	u32 item_size)
	170	{
	171	if (!IS_ALIGNED(item_size, sizeof(u64))) {
efe120a0	172	pr_warn("BTRFS: uuid item with illegal size %lu!\n",
8f8ae8e2 SB	173	(unsigned long)item_size);
	174	return;
	175	}
	176	while (item_size) {
	177	__le64 subvol_id;
	178
	179	read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
cc7c7714	180	pr_info("\t\tsubvol_id %llu\n", le64_to_cpu(subvol_id));
8f8ae8e2 SB	181	item_size -= sizeof(u64);
	182	offset += sizeof(u64);
	183	}
	184	}
	185
b5459936 QW	186	/*
	187	* Helper to output refs and locking status of extent buffer. Useful to debug
	188	* race condition related problems.
	189	*/
	190	static void print_eb_refs_lock(struct extent_buffer *eb)
	191	{
	192	#ifdef CONFIG_BTRFS_DEBUG
196d59ab JB	193	btrfs_info(eb->fs_info, "refs %u lock_owner %u current %u",
196d59ab JB	194	atomic_read(&eb->refs), eb->lock_owner, current->pid);
b5459936 QW	195	#endif
	196	}
	197
a4f78750	198	void btrfs_print_leaf(struct extent_buffer *l)
5de08d7d	199	{
a4f78750	200	struct btrfs_fs_info *fs_info;
5de08d7d	201	int i;
068132ba	202	u32 type, nr;
0783fcfc	203	struct btrfs_item *item;
3768f368	204	struct btrfs_root_item *ri;
1d4f6404	205	struct btrfs_dir_item *di;
293ffd5f	206	struct btrfs_inode_item *ii;
9078a3e1	207	struct btrfs_block_group_item *bi;
8c2383c3	208	struct btrfs_file_extent_item *fi;
5d4f98a2 YZ	209	struct btrfs_extent_data_ref *dref;
	210	struct btrfs_shared_data_ref *sref;
	211	struct btrfs_dev_extent *dev_extent;
5f39d397 CM	212	struct btrfs_key key;
5f39d397 CM	213	struct btrfs_key found_key;
1d4f6404	214
068132ba DB	215	if (!l)
	216	return;
	217
a4f78750	218	fs_info = l->fs_info;
068132ba DB	219	nr = btrfs_header_nritems(l);
068132ba DB	220
c0872323 QW	221	btrfs_info(fs_info,
	222	"leaf %llu gen %llu total ptrs %d free space %d owner %llu",
	223	btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
e902baac	224	btrfs_leaf_free_space(l), btrfs_header_owner(l));
b5459936	225	print_eb_refs_lock(l);
5de08d7d	226	for (i = 0 ; i < nr ; i++) {
dd3cc16b	227	item = btrfs_item_nr(i);
5f39d397	228	btrfs_item_key_to_cpu(l, &key, i);
962a298f	229	type = key.type;
62e85577	230	pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
c1c9ff7c	231	i, key.objectid, type, key.offset,
5f39d397	232	btrfs_item_offset(l, item), btrfs_item_size(l, item));
62e2749e CM	233	switch (type) {
62e2749e CM	234	case BTRFS_INODE_ITEM_KEY:
293ffd5f	235	ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
62e85577	236	pr_info("\t\tinode generation %llu size %llu mode %o\n",
d397712b	237	btrfs_inode_generation(l, ii),
c1c9ff7c	238	btrfs_inode_size(l, ii),
5f39d397	239	btrfs_inode_mode(l, ii));
62e2749e CM	240	break;
62e2749e CM	241	case BTRFS_DIR_ITEM_KEY:
1d4f6404	242	di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
5f39d397	243	btrfs_dir_item_key_to_cpu(l, di, &found_key);
62e85577	244	pr_info("\t\tdir oid %llu type %u\n",
c1c9ff7c	245	found_key.objectid,
5f39d397	246	btrfs_dir_type(l, di));
62e2749e CM	247	break;
	248	case BTRFS_ROOT_ITEM_KEY:
	249	ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
62e85577	250	pr_info("\t\troot data bytenr %llu refs %u\n",
d397712b	251	btrfs_disk_root_bytenr(l, ri),
5f39d397	252	btrfs_disk_root_refs(l, ri));
62e2749e CM	253	break;
62e2749e CM	254	case BTRFS_EXTENT_ITEM_KEY:
be2c765d JB	255	case BTRFS_METADATA_ITEM_KEY:
be2c765d JB	256	print_extent_item(l, i, type);
62e2749e	257	break;
5d4f98a2	258	case BTRFS_TREE_BLOCK_REF_KEY:
62e85577	259	pr_info("\t\ttree block backref\n");
5d4f98a2 YZ	260	break;
5d4f98a2 YZ	261	case BTRFS_SHARED_BLOCK_REF_KEY:
62e85577	262	pr_info("\t\tshared block backref\n");
5d4f98a2 YZ	263	break;
	264	case BTRFS_EXTENT_DATA_REF_KEY:
	265	dref = btrfs_item_ptr(l, i,
	266	struct btrfs_extent_data_ref);
	267	print_extent_data_ref(l, dref);
	268	break;
	269	case BTRFS_SHARED_DATA_REF_KEY:
	270	sref = btrfs_item_ptr(l, i,
	271	struct btrfs_shared_data_ref);
62e85577	272	pr_info("\t\tshared data backref count %u\n",
5d4f98a2	273	btrfs_shared_data_ref_count(l, sref));
7bb86316	274	break;
8c2383c3 CM	275	case BTRFS_EXTENT_DATA_KEY:
	276	fi = btrfs_item_ptr(l, i,
	277	struct btrfs_file_extent_item);
5f39d397	278	if (btrfs_file_extent_type(l, fi) ==
8c2383c3	279	BTRFS_FILE_EXTENT_INLINE) {
e41ca589 QW	280	pr_info("\t\tinline extent data size %llu\n",
e41ca589 QW	281	btrfs_file_extent_ram_bytes(l, fi));
8c2383c3 CM	282	break;
8c2383c3 CM	283	}
62e85577	284	pr_info("\t\textent data disk bytenr %llu nr %llu\n",
d397712b	285	btrfs_file_extent_disk_bytenr(l, fi),
d397712b	286	btrfs_file_extent_disk_num_bytes(l, fi));
62e85577	287	pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
d397712b	288	btrfs_file_extent_offset(l, fi),
d397712b	289	btrfs_file_extent_num_bytes(l, fi),
d397712b	290	btrfs_file_extent_ram_bytes(l, fi));
8c2383c3	291	break;
5d4f98a2	292	case BTRFS_EXTENT_REF_V0_KEY:
ba3c2b19 NB	293	btrfs_print_v0_err(fs_info);
ba3c2b19 NB	294	btrfs_handle_fs_error(fs_info, -EINVAL, NULL);
333e8105	295	break;
9078a3e1 CM	296	case BTRFS_BLOCK_GROUP_ITEM_KEY:
	297	bi = btrfs_item_ptr(l, i,
	298	struct btrfs_block_group_item);
555ba411 LB	299	pr_info(
555ba411 LB	300	"\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
0222dfdd DS	301	btrfs_block_group_used(l, bi),
	302	btrfs_block_group_chunk_objectid(l, bi),
	303	btrfs_block_group_flags(l, bi));
62e2749e	304	break;
0b86a832	305	case BTRFS_CHUNK_ITEM_KEY:
d397712b CM	306	print_chunk(l, btrfs_item_ptr(l, i,
d397712b CM	307	struct btrfs_chunk));
0b86a832 CM	308	break;
	309	case BTRFS_DEV_ITEM_KEY:
	310	print_dev_item(l, btrfs_item_ptr(l, i,
	311	struct btrfs_dev_item));
	312	break;
	313	case BTRFS_DEV_EXTENT_KEY:
	314	dev_extent = btrfs_item_ptr(l, i,
	315	struct btrfs_dev_extent);
62e85577	316	pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
e17cade2	317	btrfs_dev_extent_chunk_tree(l, dev_extent),
e17cade2	318	btrfs_dev_extent_chunk_objectid(l, dev_extent),
e17cade2	319	btrfs_dev_extent_chunk_offset(l, dev_extent),
e17cade2	320	btrfs_dev_extent_length(l, dev_extent));
0e636027	321	break;
585a3d0d	322	case BTRFS_PERSISTENT_ITEM_KEY:
62e85577	323	pr_info("\t\tpersistent item objectid %llu offset %llu\n",
585a3d0d DS	324	key.objectid, key.offset);
	325	switch (key.objectid) {
	326	case BTRFS_DEV_STATS_OBJECTID:
62e85577	327	pr_info("\t\tdevice stats\n");
585a3d0d DS	328	break;
585a3d0d DS	329	default:
62e85577	330	pr_info("\t\tunknown persistent item\n");
585a3d0d	331	}
733f4fbb	332	break;
9f07e1d7	333	case BTRFS_TEMPORARY_ITEM_KEY:
62e85577	334	pr_info("\t\ttemporary item objectid %llu offset %llu\n",
9f07e1d7 DS	335	key.objectid, key.offset);
	336	switch (key.objectid) {
	337	case BTRFS_BALANCE_OBJECTID:
62e85577	338	pr_info("\t\tbalance status\n");
9f07e1d7 DS	339	break;
9f07e1d7 DS	340	default:
62e85577	341	pr_info("\t\tunknown temporary item\n");
9f07e1d7 DS	342	}
9f07e1d7 DS	343	break;
a2bff640	344	case BTRFS_DEV_REPLACE_KEY:
62e85577	345	pr_info("\t\tdev replace\n");
a2bff640	346	break;
8f8ae8e2 SB	347	case BTRFS_UUID_KEY_SUBVOL:
	348	case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
	349	print_uuid_item(l, btrfs_item_ptr_offset(l, i),
	350	btrfs_item_size_nr(l, i));
	351	break;
0ab575c5	352	}
5de08d7d CM	353	}
5de08d7d CM	354	}
e20d96d6	355
c0872323	356	void btrfs_print_tree(struct extent_buffer *c, bool follow)
5de08d7d	357	{
abe60ba4	358	struct btrfs_fs_info *fs_info;
e17cade2	359	int i; u32 nr;
5f39d397	360	struct btrfs_key key;
db94535d	361	int level;
5de08d7d	362
5f39d397	363	if (!c)
5de08d7d	364	return;
abe60ba4	365	fs_info = c->fs_info;
5f39d397	366	nr = btrfs_header_nritems(c);
db94535d CM	367	level = btrfs_header_level(c);
db94535d CM	368	if (level == 0) {
a4f78750	369	btrfs_print_leaf(c);
5de08d7d CM	370	return;
5de08d7d CM	371	}
0b246afa	372	btrfs_info(fs_info,
c0872323 QW	373	"node %llu level %d gen %llu total ptrs %d free spc %u owner %llu",
	374	btrfs_header_bytenr(c), level, btrfs_header_generation(c),
	375	nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr,
	376	btrfs_header_owner(c));
b5459936	377	print_eb_refs_lock(c);
5de08d7d	378	for (i = 0; i < nr; i++) {
5f39d397	379	btrfs_node_key_to_cpu(c, &key, i);
c0872323	380	pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n",
c1c9ff7c	381	i, key.objectid, key.type, key.offset,
c0872323 QW	382	btrfs_node_blockptr(c, i),
c0872323 QW	383	btrfs_node_ptr_generation(c, i));
5de08d7d	384	}
c0872323 QW	385	if (!follow)
c0872323 QW	386	return;
5de08d7d	387	for (i = 0; i < nr; i++) {
581c1760 QW	388	struct btrfs_key first_key;
	389	struct extent_buffer *next;
	390
	391	btrfs_node_key_to_cpu(c, &first_key, i);
	392	next = read_tree_block(fs_info, btrfs_node_blockptr(c, i),
1b7ec85e	393	btrfs_header_owner(c),
581c1760 QW	394	btrfs_node_ptr_generation(c, i),
581c1760 QW	395	level - 1, &first_key);
a42cbec9 LB	396	if (IS_ERR(next)) {
	397	continue;
	398	} else if (!extent_buffer_uptodate(next)) {
	399	free_extent_buffer(next);
	400	continue;
	401	}
	402
7518a238	403	if (btrfs_is_leaf(next) &&
c271b492	404	level != 1)
5de08d7d	405	BUG();
5f39d397	406	if (btrfs_header_level(next) !=
c271b492	407	level - 1)
5de08d7d	408	BUG();
c0872323	409	btrfs_print_tree(next, follow);
5f39d397	410	free_extent_buffer(next);
5de08d7d	411	}
5de08d7d	412	}