From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- fs/btrfs/print-tree.c | 414 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 414 insertions(+) create mode 100644 fs/btrfs/print-tree.c (limited to 'fs/btrfs/print-tree.c') diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c new file mode 100644 index 0000000000..0c93439e92 --- /dev/null +++ b/fs/btrfs/print-tree.c @@ -0,0 +1,414 @@ +// 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" + +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_BLOCK_GROUP_TREE_OBJECTID, "BLOCK_GROUP_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(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_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_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)); + btrfs_handle_fs_error(eb->fs_info, -EUCLEAN, 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 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; + 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); + } +} + +/* + * 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); + 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; + } + } +} + +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); + } +} -- cgit v1.2.3