diff options
Diffstat (limited to 'fs/btrfs/print-tree.c')
| -rw-r--r-- | fs/btrfs/print-tree.c | 639 |
1 files changed, 639 insertions, 0 deletions
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c new file mode 100644 index 000000000..53e726119 --- /dev/null +++ b/fs/btrfs/print-tree.c @@ -0,0 +1,639 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2007 Oracle. All rights reserved. + */ + +#include "messages.h" +#include "ctree.h" +#include "disk-io.h" +#include "file-item.h" +#include "print-tree.h" +#include "accessors.h" +#include "tree-checker.h" +#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; +}; + +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" }, + { BTRFS_REMAP_TREE_OBJECTID, "REMAP_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 " BTRFS_KEY_FMT " 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))) { + btrfs_warn(l->fs_info, "uuid item with illegal size %lu", + (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", + refcount_read(&eb->refs), eb->lock_owner, current->pid); +#endif +} + +static void print_timespec(const struct extent_buffer *eb, + struct btrfs_timespec *timespec, + const char *prefix, const char *suffix) +{ + const u64 secs = btrfs_timespec_sec(eb, timespec); + const u32 nsecs = btrfs_timespec_nsec(eb, timespec); + + pr_info("%s%llu.%u%s", prefix, secs, nsecs, suffix); +} + +static void print_inode_item(const struct extent_buffer *eb, int i) +{ + struct btrfs_inode_item *ii = btrfs_item_ptr(eb, i, struct btrfs_inode_item); + + pr_info("\t\tinode generation %llu transid %llu size %llu nbytes %llu\n", + btrfs_inode_generation(eb, ii), btrfs_inode_transid(eb, ii), + btrfs_inode_size(eb, ii), btrfs_inode_nbytes(eb, ii)); + pr_info("\t\tblock group %llu mode %o links %u uid %u gid %u\n", + btrfs_inode_block_group(eb, ii), btrfs_inode_mode(eb, ii), + btrfs_inode_nlink(eb, ii), btrfs_inode_uid(eb, ii), + btrfs_inode_gid(eb, ii)); + pr_info("\t\trdev %llu sequence %llu flags 0x%llx\n", + btrfs_inode_rdev(eb, ii), btrfs_inode_sequence(eb, ii), + btrfs_inode_flags(eb, ii)); + print_timespec(eb, &ii->atime, "\t\tatime ", "\n"); + print_timespec(eb, &ii->ctime, "\t\tctime ", "\n"); + print_timespec(eb, &ii->mtime, "\t\tmtime ", "\n"); + print_timespec(eb, &ii->otime, "\t\totime ", "\n"); +} + +static void print_dir_item(const struct extent_buffer *eb, int i) +{ + const u32 size = btrfs_item_size(eb, i); + struct btrfs_dir_item *di = btrfs_item_ptr(eb, i, struct btrfs_dir_item); + u32 cur = 0; + + while (cur < size) { + const u32 name_len = btrfs_dir_name_len(eb, di); + const u32 data_len = btrfs_dir_data_len(eb, di); + const u32 len = sizeof(*di) + name_len + data_len; + struct btrfs_key location; + + btrfs_dir_item_key_to_cpu(eb, di, &location); + pr_info("\t\tlocation key " BTRFS_KEY_FMT " type %d\n", + BTRFS_KEY_FMT_VALUE(&location), btrfs_dir_ftype(eb, di)); + pr_info("\t\ttransid %llu data_len %u name_len %u\n", + btrfs_dir_transid(eb, di), data_len, name_len); + di = (struct btrfs_dir_item *)((char *)di + len); + cur += len; + } +} + +static void print_inode_ref_item(const struct extent_buffer *eb, int i) +{ + const u32 size = btrfs_item_size(eb, i); + struct btrfs_inode_ref *ref = btrfs_item_ptr(eb, i, struct btrfs_inode_ref); + u32 cur = 0; + + while (cur < size) { + const u64 index = btrfs_inode_ref_index(eb, ref); + const u32 name_len = btrfs_inode_ref_name_len(eb, ref); + const u32 len = sizeof(*ref) + name_len; + + pr_info("\t\tindex %llu name_len %u\n", index, name_len); + ref = (struct btrfs_inode_ref *)((char *)ref + len); + cur += len; + } +} + +static void print_inode_extref_item(const struct extent_buffer *eb, int i) +{ + const u32 size = btrfs_item_size(eb, i); + struct btrfs_inode_extref *extref; + u32 cur = 0; + + extref = btrfs_item_ptr(eb, i, struct btrfs_inode_extref); + while (cur < size) { + const u64 index = btrfs_inode_extref_index(eb, extref); + const u32 name_len = btrfs_inode_extref_name_len(eb, extref); + const u64 parent = btrfs_inode_extref_parent(eb, extref); + const u32 len = sizeof(*extref) + name_len; + + pr_info("\t\tindex %llu parent %llu name_len %u\n", + index, parent, name_len); + extref = (struct btrfs_inode_extref *)((char *)extref + len); + cur += len; + } +} + +static void print_dir_log_index_item(const struct extent_buffer *eb, int i) +{ + struct btrfs_dir_log_item *dlog; + + dlog = btrfs_item_ptr(eb, i, struct btrfs_dir_log_item); + pr_info("\t\tdir log end %llu\n", btrfs_dir_log_end(eb, dlog)); +} + +static void print_extent_csum(const struct extent_buffer *eb, int i) +{ + const struct btrfs_fs_info *fs_info = eb->fs_info; + const u32 size = btrfs_item_size(eb, i); + const u32 csum_bytes = (size / fs_info->csum_size) * fs_info->sectorsize; + struct btrfs_key key; + + btrfs_item_key_to_cpu(eb, &key, i); + pr_info("\t\trange start %llu end %llu length %u\n", + key.offset, key.offset + csum_bytes, csum_bytes); +} + +static void print_file_extent_item(const struct extent_buffer *eb, int i) +{ + struct btrfs_file_extent_item *fi; + + fi = btrfs_item_ptr(eb, i, struct btrfs_file_extent_item); + pr_info("\t\tgeneration %llu type %hhu\n", + btrfs_file_extent_generation(eb, fi), + btrfs_file_extent_type(eb, fi)); + + if (btrfs_file_extent_type(eb, fi) == BTRFS_FILE_EXTENT_INLINE) { + pr_info("\t\tinline extent data size %u ram_bytes %llu compression %hhu\n", + btrfs_file_extent_inline_item_len(eb, i), + btrfs_file_extent_ram_bytes(eb, fi), + btrfs_file_extent_compression(eb, fi)); + return; + } + + pr_info("\t\textent data disk bytenr %llu nr %llu\n", + btrfs_file_extent_disk_bytenr(eb, fi), + btrfs_file_extent_disk_num_bytes(eb, fi)); + pr_info("\t\textent data offset %llu nr %llu ram %llu\n", + btrfs_file_extent_offset(eb, fi), + btrfs_file_extent_num_bytes(eb, fi), + btrfs_file_extent_ram_bytes(eb, fi)); + pr_info("\t\textent compression %hhu\n", + 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", + [BTRFS_IDENTITY_REMAP_KEY] = "IDENTITY_REMAP", + [BTRFS_REMAP_KEY] = "REMAP", + [BTRFS_REMAP_BACKREF_KEY] = "REMAP_BACKREF", + }; + + 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, "%s", 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; + int i; + u32 type, nr; + struct btrfs_root_item *ri; + struct btrfs_block_group_item *bi; + struct btrfs_extent_data_ref *dref; + struct btrfs_shared_data_ref *sref; + struct btrfs_dev_extent *dev_extent; + struct btrfs_remap_item *remap; + struct btrfs_key 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 %lld", + btrfs_header_bytenr(l), btrfs_header_generation(l), nr, + btrfs_leaf_free_space(l), (s64)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; + 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: + print_inode_item(l, i); + break; + case BTRFS_INODE_REF_KEY: + print_inode_ref_item(l, i); + break; + case BTRFS_INODE_EXTREF_KEY: + print_inode_extref_item(l, i); + break; + case BTRFS_DIR_ITEM_KEY: + case BTRFS_DIR_INDEX_KEY: + case BTRFS_XATTR_ITEM_KEY: + print_dir_item(l, i); + break; + case BTRFS_DIR_LOG_INDEX_KEY: + print_dir_log_index_item(l, i); + break; + case BTRFS_EXTENT_CSUM_KEY: + print_extent_csum(l, i); + 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: + print_file_extent_item(l, i); + 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; + case BTRFS_REMAP_KEY: + case BTRFS_REMAP_BACKREF_KEY: + remap = btrfs_item_ptr(l, i, struct btrfs_remap_item); + pr_info("\t\taddress %llu\n", btrfs_remap_address(l, remap)); + 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 %lld", + btrfs_header_bytenr(c), level, btrfs_header_generation(c), + nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr, + (s64)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 " BTRFS_KEY_FMT " block %llu gen %llu\n", + i, BTRFS_KEY_FMT_VALUE(&key), 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 (btrfs_is_leaf(next) && + level != 1) + BUG(); + if (btrfs_header_level(next) != + level - 1) + BUG(); + btrfs_print_tree(next, follow); + free_extent_buffer(next); + } +} |