[linux-2.6-block.git] / fs / btrfs / print-tree.c

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

#include "messages.h"
#include "ctree.h"
#include "disk-io.h"
#include "print-tree.h"
#include "accessors.h"
#include "tree-checker.h"
#include "volumes.h"
#include "raid-stripe-tree.h"

struct root_name_map {
	u64 id;
	const char *name;
};

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_BLOCK_GROUP_TREE_OBJECTID,	"BLOCK_GROUP_TREE"	},
	{ BTRFS_DATA_RELOC_TREE_OBJECTID,	"DATA_RELOC_TREE"	},
	{ BTRFS_RAID_STRIPE_TREE_OBJECTID,	"RAID_STRIPE_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(const 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(const 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(const 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_owner_ref(const struct extent_buffer *eb,
				   const struct btrfs_extent_owner_ref *ref)
{
	ASSERT(btrfs_fs_incompat(eb->fs_info, SIMPLE_QUOTA));
	pr_cont("extent data owner root %llu\n", btrfs_extent_owner_ref_root_id(eb, ref));
}

static void print_extent_item(const 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_extent_owner_ref *oref;
	struct btrfs_disk_key key;
	unsigned long end;
	unsigned long ptr;
	u32 item_size = btrfs_item_size(eb, slot);
	u64 flags;
	u64 offset;
	int ref_index = 0;

	if (unlikely(item_size < sizeof(*ei))) {
		btrfs_err(eb->fs_info,
			  "unexpected extent item size, has %u expect >= %zu",
			  item_size, sizeof(*ei));
		return;
	}

	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 sectorsize.
			 */
			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_OWNER_REF_KEY:
			oref = (struct btrfs_extent_owner_ref *)(&iref->offset);
			print_extent_owner_ref(eb, oref);
			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(const 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);
	}
}

static void print_raid_stripe_key(const struct extent_buffer *eb, u32 item_size,
				  struct btrfs_stripe_extent *stripe)
{
	const int num_stripes = btrfs_num_raid_stripes(item_size);

	for (int i = 0; i < num_stripes; i++)
		pr_info("\t\t\tstride %d devid %llu physical %llu\n",
			i, btrfs_raid_stride_devid(eb, &stripe->strides[i]),
			btrfs_raid_stride_physical(eb, &stripe->strides[i]));
}

/*
 * Helper to output refs and locking status of extent buffer.  Useful to debug
 * race condition related problems.
 */
static void print_eb_refs_lock(const 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(const struct extent_buffer *l)
{
	struct btrfs_fs_info *fs_info;
	int i;
	u32 type, nr;
	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++) {
		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, i), btrfs_item_size(l, i));
		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 flags %u\n",
				found_key.objectid,
				btrfs_dir_flags(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);
			pr_info("\t\tgeneration %llu type %hhu\n",
				btrfs_file_extent_generation(l, fi),
				btrfs_file_extent_type(l, fi));
			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_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(l, i));
			break;
		case BTRFS_RAID_STRIPE_KEY:
			print_raid_stripe_key(l, btrfs_item_size(l, i),
				btrfs_item_ptr(l, i, struct btrfs_stripe_extent));
			break;
		}
	}
}

void btrfs_print_tree(const 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_tree_parent_check check = {
			.level = level - 1,
			.transid = btrfs_node_ptr_generation(c, i),
			.owner_root = btrfs_header_owner(c),
			.has_first_key = true
		};
		struct extent_buffer *next;

		btrfs_node_key_to_cpu(c, &check.first_key, i);
		next = read_tree_block(fs_info, btrfs_node_blockptr(c, i), &check);
		if (IS_ERR(next))
			continue;
		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
	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright (C) 2007 Oracle. All rights reserved.
	4	*/
	5
	6	#include "messages.h"
	7	#include "ctree.h"
	8	#include "disk-io.h"
	9	#include "print-tree.h"
	10	#include "accessors.h"
	11	#include "tree-checker.h"
	12	#include "volumes.h"
	13	#include "raid-stripe-tree.h"
	14
	15	struct root_name_map {
	16	u64 id;
	17	const char *name;
	18	};
	19
	20	static const struct root_name_map root_map[] = {
	21	{ BTRFS_ROOT_TREE_OBJECTID, "ROOT_TREE" },
	22	{ BTRFS_EXTENT_TREE_OBJECTID, "EXTENT_TREE" },
	23	{ BTRFS_CHUNK_TREE_OBJECTID, "CHUNK_TREE" },
	24	{ BTRFS_DEV_TREE_OBJECTID, "DEV_TREE" },
	25	{ BTRFS_FS_TREE_OBJECTID, "FS_TREE" },
	26	{ BTRFS_CSUM_TREE_OBJECTID, "CSUM_TREE" },
	27	{ BTRFS_TREE_LOG_OBJECTID, "TREE_LOG" },
	28	{ BTRFS_QUOTA_TREE_OBJECTID, "QUOTA_TREE" },
	29	{ BTRFS_UUID_TREE_OBJECTID, "UUID_TREE" },
	30	{ BTRFS_FREE_SPACE_TREE_OBJECTID, "FREE_SPACE_TREE" },
	31	{ BTRFS_BLOCK_GROUP_TREE_OBJECTID, "BLOCK_GROUP_TREE" },
	32	{ BTRFS_DATA_RELOC_TREE_OBJECTID, "DATA_RELOC_TREE" },
	33	{ BTRFS_RAID_STRIPE_TREE_OBJECTID, "RAID_STRIPE_TREE" },
	34	};
	35
	36	const char btrfs_root_name(const struct btrfs_key key, char *buf)
	37	{
	38	int i;
	39
	40	if (key->objectid == BTRFS_TREE_RELOC_OBJECTID) {
	41	snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN,
	42	"TREE_RELOC offset=%llu", key->offset);
	43	return buf;
	44	}
	45
	46	for (i = 0; i < ARRAY_SIZE(root_map); i++) {
	47	if (root_map[i].id == key->objectid)
	48	return root_map[i].name;
	49	}
	50
	51	snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, "%llu", key->objectid);
	52	return buf;
	53	}
	54
	55	static void print_chunk(const struct extent_buffer eb, struct btrfs_chunk chunk)
	56	{
	57	int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
	58	int i;
	59	pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
	60	btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
	61	btrfs_chunk_type(eb, chunk), num_stripes);
	62	for (i = 0 ; i < num_stripes ; i++) {
	63	pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i,
	64	btrfs_stripe_devid_nr(eb, chunk, i),
	65	btrfs_stripe_offset_nr(eb, chunk, i));
	66	}
	67	}
	68	static void print_dev_item(const struct extent_buffer *eb,
	69	struct btrfs_dev_item *dev_item)
	70	{
	71	pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n",
	72	btrfs_device_id(eb, dev_item),
	73	btrfs_device_total_bytes(eb, dev_item),
	74	btrfs_device_bytes_used(eb, dev_item));
	75	}
	76	static void print_extent_data_ref(const struct extent_buffer *eb,
	77	struct btrfs_extent_data_ref *ref)
	78	{
	79	pr_cont("extent data backref root %llu objectid %llu offset %llu count %u\n",
	80	btrfs_extent_data_ref_root(eb, ref),
	81	btrfs_extent_data_ref_objectid(eb, ref),
	82	btrfs_extent_data_ref_offset(eb, ref),
	83	btrfs_extent_data_ref_count(eb, ref));
	84	}
	85
	86	static void print_extent_owner_ref(const struct extent_buffer *eb,
	87	const struct btrfs_extent_owner_ref *ref)
	88	{
	89	ASSERT(btrfs_fs_incompat(eb->fs_info, SIMPLE_QUOTA));
	90	pr_cont("extent data owner root %llu\n", btrfs_extent_owner_ref_root_id(eb, ref));
	91	}
	92
	93	static void print_extent_item(const struct extent_buffer *eb, int slot, int type)
	94	{
	95	struct btrfs_extent_item *ei;
	96	struct btrfs_extent_inline_ref *iref;
	97	struct btrfs_extent_data_ref *dref;
	98	struct btrfs_shared_data_ref *sref;
	99	struct btrfs_extent_owner_ref *oref;
	100	struct btrfs_disk_key key;
	101	unsigned long end;
	102	unsigned long ptr;
	103	u32 item_size = btrfs_item_size(eb, slot);
	104	u64 flags;
	105	u64 offset;
	106	int ref_index = 0;
	107
	108	if (unlikely(item_size < sizeof(*ei))) {
	109	btrfs_err(eb->fs_info,
	110	"unexpected extent item size, has %u expect >= %zu",
	111	item_size, sizeof(*ei));
	112	return;
	113	}
	114
	115	ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
	116	flags = btrfs_extent_flags(eb, ei);
	117
	118	pr_info("\t\textent refs %llu gen %llu flags %llu\n",
	119	btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
	120	flags);
	121
	122	if ((type == BTRFS_EXTENT_ITEM_KEY) &&
	123	flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
	124	struct btrfs_tree_block_info *info;
	125	info = (struct btrfs_tree_block_info *)(ei + 1);
	126	btrfs_tree_block_key(eb, info, &key);
	127	pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
	128	btrfs_disk_key_objectid(&key), key.type,
	129	btrfs_disk_key_offset(&key),
	130	btrfs_tree_block_level(eb, info));
	131	iref = (struct btrfs_extent_inline_ref *)(info + 1);
	132	} else {
	133	iref = (struct btrfs_extent_inline_ref *)(ei + 1);
	134	}
	135
	136	ptr = (unsigned long)iref;
	137	end = (unsigned long)ei + item_size;
	138	while (ptr < end) {
	139	iref = (struct btrfs_extent_inline_ref *)ptr;
	140	type = btrfs_extent_inline_ref_type(eb, iref);
	141	offset = btrfs_extent_inline_ref_offset(eb, iref);
	142	pr_info("\t\tref#%d: ", ref_index++);
	143	switch (type) {
	144	case BTRFS_TREE_BLOCK_REF_KEY:
	145	pr_cont("tree block backref root %llu\n", offset);
	146	break;
	147	case BTRFS_SHARED_BLOCK_REF_KEY:
	148	pr_cont("shared block backref parent %llu\n", offset);
	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->sectorsize))
	154	pr_info(
	155	"\t\t\t(parent %llu not aligned to sectorsize %u)\n",
	156	offset, eb->fs_info->sectorsize);
	157	break;
	158	case BTRFS_EXTENT_DATA_REF_KEY:
	159	dref = (struct btrfs_extent_data_ref *)(&iref->offset);
	160	print_extent_data_ref(eb, dref);
	161	break;
	162	case BTRFS_SHARED_DATA_REF_KEY:
	163	sref = (struct btrfs_shared_data_ref *)(iref + 1);
	164	pr_cont("shared data backref parent %llu count %u\n",
	165	offset, btrfs_shared_data_ref_count(eb, sref));
	166	/*
	167	* Offset is supposed to be a tree block which must be
	168	* aligned to sectorsize.
	169	*/
	170	if (!IS_ALIGNED(offset, eb->fs_info->sectorsize))
	171	pr_info(
	172	"\t\t\t(parent %llu not aligned to sectorsize %u)\n",
	173	offset, eb->fs_info->sectorsize);
	174	break;
	175	case BTRFS_EXTENT_OWNER_REF_KEY:
	176	oref = (struct btrfs_extent_owner_ref *)(&iref->offset);
	177	print_extent_owner_ref(eb, oref);
	178	break;
	179	default:
	180	pr_cont("(extent %llu has INVALID ref type %d)\n",
	181	eb->start, type);
	182	return;
	183	}
	184	ptr += btrfs_extent_inline_ref_size(type);
	185	}
	186	WARN_ON(ptr > end);
	187	}
	188
	189	static void print_uuid_item(const struct extent_buffer *l, unsigned long offset,
	190	u32 item_size)
	191	{
	192	if (!IS_ALIGNED(item_size, sizeof(u64))) {
	193	pr_warn("BTRFS: uuid item with illegal size %lu!\n",
	194	(unsigned long)item_size);
	195	return;
	196	}
	197	while (item_size) {
	198	__le64 subvol_id;
	199
	200	read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
	201	pr_info("\t\tsubvol_id %llu\n", le64_to_cpu(subvol_id));
	202	item_size -= sizeof(u64);
	203	offset += sizeof(u64);
	204	}
	205	}
	206
	207	static void print_raid_stripe_key(const struct extent_buffer *eb, u32 item_size,
	208	struct btrfs_stripe_extent *stripe)
	209	{
	210	const int num_stripes = btrfs_num_raid_stripes(item_size);
	211
	212	for (int i = 0; i < num_stripes; i++)
	213	pr_info("\t\t\tstride %d devid %llu physical %llu\n",
	214	i, btrfs_raid_stride_devid(eb, &stripe->strides[i]),
	215	btrfs_raid_stride_physical(eb, &stripe->strides[i]));
	216	}
	217
	218	/*
	219	* Helper to output refs and locking status of extent buffer. Useful to debug
	220	* race condition related problems.
	221	*/
	222	static void print_eb_refs_lock(const struct extent_buffer *eb)
	223	{
	224	#ifdef CONFIG_BTRFS_DEBUG
	225	btrfs_info(eb->fs_info, "refs %u lock_owner %u current %u",
	226	atomic_read(&eb->refs), eb->lock_owner, current->pid);
	227	#endif
	228	}
	229
	230	void btrfs_print_leaf(const struct extent_buffer *l)
	231	{
	232	struct btrfs_fs_info *fs_info;
	233	int i;
	234	u32 type, nr;
	235	struct btrfs_root_item *ri;
	236	struct btrfs_dir_item *di;
	237	struct btrfs_inode_item *ii;
	238	struct btrfs_block_group_item *bi;
	239	struct btrfs_file_extent_item *fi;
	240	struct btrfs_extent_data_ref *dref;
	241	struct btrfs_shared_data_ref *sref;
	242	struct btrfs_dev_extent *dev_extent;
	243	struct btrfs_key key;
	244	struct btrfs_key found_key;
	245
	246	if (!l)
	247	return;
	248
	249	fs_info = l->fs_info;
	250	nr = btrfs_header_nritems(l);
	251
	252	btrfs_info(fs_info,
	253	"leaf %llu gen %llu total ptrs %d free space %d owner %llu",
	254	btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
	255	btrfs_leaf_free_space(l), btrfs_header_owner(l));
	256	print_eb_refs_lock(l);
	257	for (i = 0 ; i < nr ; i++) {
	258	btrfs_item_key_to_cpu(l, &key, i);
	259	type = key.type;
	260	pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
	261	i, key.objectid, type, key.offset,
	262	btrfs_item_offset(l, i), btrfs_item_size(l, i));
	263	switch (type) {
	264	case BTRFS_INODE_ITEM_KEY:
	265	ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
	266	pr_info("\t\tinode generation %llu size %llu mode %o\n",
	267	btrfs_inode_generation(l, ii),
	268	btrfs_inode_size(l, ii),
	269	btrfs_inode_mode(l, ii));
	270	break;
	271	case BTRFS_DIR_ITEM_KEY:
	272	di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
	273	btrfs_dir_item_key_to_cpu(l, di, &found_key);
	274	pr_info("\t\tdir oid %llu flags %u\n",
	275	found_key.objectid,
	276	btrfs_dir_flags(l, di));
	277	break;
	278	case BTRFS_ROOT_ITEM_KEY:
	279	ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
	280	pr_info("\t\troot data bytenr %llu refs %u\n",
	281	btrfs_disk_root_bytenr(l, ri),
	282	btrfs_disk_root_refs(l, ri));
	283	break;
	284	case BTRFS_EXTENT_ITEM_KEY:
	285	case BTRFS_METADATA_ITEM_KEY:
	286	print_extent_item(l, i, type);
	287	break;
	288	case BTRFS_TREE_BLOCK_REF_KEY:
	289	pr_info("\t\ttree block backref\n");
	290	break;
	291	case BTRFS_SHARED_BLOCK_REF_KEY:
	292	pr_info("\t\tshared block backref\n");
	293	break;
	294	case BTRFS_EXTENT_DATA_REF_KEY:
	295	dref = btrfs_item_ptr(l, i,
	296	struct btrfs_extent_data_ref);
	297	print_extent_data_ref(l, dref);
	298	break;
	299	case BTRFS_SHARED_DATA_REF_KEY:
	300	sref = btrfs_item_ptr(l, i,
	301	struct btrfs_shared_data_ref);
	302	pr_info("\t\tshared data backref count %u\n",
	303	btrfs_shared_data_ref_count(l, sref));
	304	break;
	305	case BTRFS_EXTENT_DATA_KEY:
	306	fi = btrfs_item_ptr(l, i,
	307	struct btrfs_file_extent_item);
	308	pr_info("\t\tgeneration %llu type %hhu\n",
	309	btrfs_file_extent_generation(l, fi),
	310	btrfs_file_extent_type(l, fi));
	311	if (btrfs_file_extent_type(l, fi) ==
	312	BTRFS_FILE_EXTENT_INLINE) {
	313	pr_info("\t\tinline extent data size %llu\n",
	314	btrfs_file_extent_ram_bytes(l, fi));
	315	break;
	316	}
	317	pr_info("\t\textent data disk bytenr %llu nr %llu\n",
	318	btrfs_file_extent_disk_bytenr(l, fi),
	319	btrfs_file_extent_disk_num_bytes(l, fi));
	320	pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
	321	btrfs_file_extent_offset(l, fi),
	322	btrfs_file_extent_num_bytes(l, fi),
	323	btrfs_file_extent_ram_bytes(l, fi));
	324	break;
	325	case BTRFS_BLOCK_GROUP_ITEM_KEY:
	326	bi = btrfs_item_ptr(l, i,
	327	struct btrfs_block_group_item);
	328	pr_info(
	329	"\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
	330	btrfs_block_group_used(l, bi),
	331	btrfs_block_group_chunk_objectid(l, bi),
	332	btrfs_block_group_flags(l, bi));
	333	break;
	334	case BTRFS_CHUNK_ITEM_KEY:
	335	print_chunk(l, btrfs_item_ptr(l, i,
	336	struct btrfs_chunk));
	337	break;
	338	case BTRFS_DEV_ITEM_KEY:
	339	print_dev_item(l, btrfs_item_ptr(l, i,
	340	struct btrfs_dev_item));
	341	break;
	342	case BTRFS_DEV_EXTENT_KEY:
	343	dev_extent = btrfs_item_ptr(l, i,
	344	struct btrfs_dev_extent);
	345	pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
	346	btrfs_dev_extent_chunk_tree(l, dev_extent),
	347	btrfs_dev_extent_chunk_objectid(l, dev_extent),
	348	btrfs_dev_extent_chunk_offset(l, dev_extent),
	349	btrfs_dev_extent_length(l, dev_extent));
	350	break;
	351	case BTRFS_PERSISTENT_ITEM_KEY:
	352	pr_info("\t\tpersistent item objectid %llu offset %llu\n",
	353	key.objectid, key.offset);
	354	switch (key.objectid) {
	355	case BTRFS_DEV_STATS_OBJECTID:
	356	pr_info("\t\tdevice stats\n");
	357	break;
	358	default:
	359	pr_info("\t\tunknown persistent item\n");
	360	}
	361	break;
	362	case BTRFS_TEMPORARY_ITEM_KEY:
	363	pr_info("\t\ttemporary item objectid %llu offset %llu\n",
	364	key.objectid, key.offset);
	365	switch (key.objectid) {
	366	case BTRFS_BALANCE_OBJECTID:
	367	pr_info("\t\tbalance status\n");
	368	break;
	369	default:
	370	pr_info("\t\tunknown temporary item\n");
	371	}
	372	break;
	373	case BTRFS_DEV_REPLACE_KEY:
	374	pr_info("\t\tdev replace\n");
	375	break;
	376	case BTRFS_UUID_KEY_SUBVOL:
	377	case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
	378	print_uuid_item(l, btrfs_item_ptr_offset(l, i),
	379	btrfs_item_size(l, i));
	380	break;
	381	case BTRFS_RAID_STRIPE_KEY:
	382	print_raid_stripe_key(l, btrfs_item_size(l, i),
	383	btrfs_item_ptr(l, i, struct btrfs_stripe_extent));
	384	break;
	385	}
	386	}
	387	}
	388
	389	void btrfs_print_tree(const struct extent_buffer *c, bool follow)
	390	{
	391	struct btrfs_fs_info *fs_info;
	392	int i; u32 nr;
	393	struct btrfs_key key;
	394	int level;
	395
	396	if (!c)
	397	return;
	398	fs_info = c->fs_info;
	399	nr = btrfs_header_nritems(c);
	400	level = btrfs_header_level(c);
	401	if (level == 0) {
	402	btrfs_print_leaf(c);
	403	return;
	404	}
	405	btrfs_info(fs_info,
	406	"node %llu level %d gen %llu total ptrs %d free spc %u owner %llu",
	407	btrfs_header_bytenr(c), level, btrfs_header_generation(c),
	408	nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr,
	409	btrfs_header_owner(c));
	410	print_eb_refs_lock(c);
	411	for (i = 0; i < nr; i++) {
	412	btrfs_node_key_to_cpu(c, &key, i);
	413	pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n",
	414	i, key.objectid, key.type, key.offset,
	415	btrfs_node_blockptr(c, i),
	416	btrfs_node_ptr_generation(c, i));
	417	}
	418	if (!follow)
	419	return;
	420	for (i = 0; i < nr; i++) {
	421	struct btrfs_tree_parent_check check = {
	422	.level = level - 1,
	423	.transid = btrfs_node_ptr_generation(c, i),
	424	.owner_root = btrfs_header_owner(c),
	425	.has_first_key = true
	426	};
	427	struct extent_buffer *next;
	428
	429	btrfs_node_key_to_cpu(c, &check.first_key, i);
	430	next = read_tree_block(fs_info, btrfs_node_blockptr(c, i), &check);
	431	if (IS_ERR(next))
	432	continue;
	433	if (!extent_buffer_uptodate(next)) {
	434	free_extent_buffer(next);
	435	continue;
	436	}
	437
	438	if (btrfs_is_leaf(next) &&
	439	level != 1)
	440	BUG();
	441	if (btrfs_header_level(next) !=
	442	level - 1)
	443	BUG();
	444	btrfs_print_tree(next, follow);
	445	free_extent_buffer(next);
	446	}
	447	}