405 строки
12 KiB
C
405 строки
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*/
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#include "ctree.h"
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#include "disk-io.h"
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#include "print-tree.h"
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static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
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{
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int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
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int i;
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pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
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btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
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btrfs_chunk_type(eb, chunk), num_stripes);
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for (i = 0 ; i < num_stripes ; i++) {
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pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i,
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btrfs_stripe_devid_nr(eb, chunk, i),
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btrfs_stripe_offset_nr(eb, chunk, i));
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}
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}
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static void print_dev_item(struct extent_buffer *eb,
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struct btrfs_dev_item *dev_item)
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{
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pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n",
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btrfs_device_id(eb, dev_item),
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btrfs_device_total_bytes(eb, dev_item),
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btrfs_device_bytes_used(eb, dev_item));
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}
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static void print_extent_data_ref(struct extent_buffer *eb,
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struct btrfs_extent_data_ref *ref)
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{
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pr_cont("extent data backref root %llu objectid %llu offset %llu count %u\n",
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btrfs_extent_data_ref_root(eb, ref),
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btrfs_extent_data_ref_objectid(eb, ref),
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btrfs_extent_data_ref_offset(eb, ref),
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btrfs_extent_data_ref_count(eb, ref));
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}
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static void print_extent_item(struct extent_buffer *eb, int slot, int type)
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{
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struct btrfs_extent_item *ei;
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struct btrfs_extent_inline_ref *iref;
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struct btrfs_extent_data_ref *dref;
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struct btrfs_shared_data_ref *sref;
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struct btrfs_disk_key key;
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unsigned long end;
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unsigned long ptr;
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u32 item_size = btrfs_item_size_nr(eb, slot);
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u64 flags;
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u64 offset;
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int ref_index = 0;
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if (item_size < sizeof(*ei)) {
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#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
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struct btrfs_extent_item_v0 *ei0;
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BUG_ON(item_size != sizeof(*ei0));
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ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
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pr_info("\t\textent refs %u\n",
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btrfs_extent_refs_v0(eb, ei0));
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return;
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#else
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BUG();
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#endif
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}
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ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
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flags = btrfs_extent_flags(eb, ei);
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pr_info("\t\textent refs %llu gen %llu flags %llu\n",
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btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
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flags);
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if ((type == BTRFS_EXTENT_ITEM_KEY) &&
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flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
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struct btrfs_tree_block_info *info;
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info = (struct btrfs_tree_block_info *)(ei + 1);
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btrfs_tree_block_key(eb, info, &key);
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pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
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btrfs_disk_key_objectid(&key), key.type,
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btrfs_disk_key_offset(&key),
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btrfs_tree_block_level(eb, info));
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iref = (struct btrfs_extent_inline_ref *)(info + 1);
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} else {
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iref = (struct btrfs_extent_inline_ref *)(ei + 1);
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}
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ptr = (unsigned long)iref;
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end = (unsigned long)ei + item_size;
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while (ptr < end) {
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iref = (struct btrfs_extent_inline_ref *)ptr;
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type = btrfs_extent_inline_ref_type(eb, iref);
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offset = btrfs_extent_inline_ref_offset(eb, iref);
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pr_info("\t\tref#%d: ", ref_index++);
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switch (type) {
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case BTRFS_TREE_BLOCK_REF_KEY:
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pr_cont("tree block backref root %llu\n", offset);
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break;
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case BTRFS_SHARED_BLOCK_REF_KEY:
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pr_cont("shared block backref parent %llu\n", offset);
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/*
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* offset is supposed to be a tree block which
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* must be aligned to nodesize.
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*/
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if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
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pr_info("\t\t\t(parent %llu is NOT ALIGNED to nodesize %llu)\n",
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offset, (unsigned long long)eb->fs_info->nodesize);
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break;
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case BTRFS_EXTENT_DATA_REF_KEY:
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dref = (struct btrfs_extent_data_ref *)(&iref->offset);
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print_extent_data_ref(eb, dref);
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break;
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case BTRFS_SHARED_DATA_REF_KEY:
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sref = (struct btrfs_shared_data_ref *)(iref + 1);
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pr_cont("shared data backref parent %llu count %u\n",
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offset, btrfs_shared_data_ref_count(eb, sref));
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/*
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* offset is supposed to be a tree block which
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* must be aligned to nodesize.
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*/
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if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
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pr_info("\t\t\t(parent %llu is NOT ALIGNED to nodesize %llu)\n",
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offset, (unsigned long long)eb->fs_info->nodesize);
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break;
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default:
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pr_cont("(extent %llu has INVALID ref type %d)\n",
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eb->start, type);
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return;
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}
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ptr += btrfs_extent_inline_ref_size(type);
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}
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WARN_ON(ptr > end);
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}
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#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
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static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
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{
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struct btrfs_extent_ref_v0 *ref0;
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ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
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printk("\t\textent back ref root %llu gen %llu owner %llu num_refs %lu\n",
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btrfs_ref_root_v0(eb, ref0),
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btrfs_ref_generation_v0(eb, ref0),
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btrfs_ref_objectid_v0(eb, ref0),
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(unsigned long)btrfs_ref_count_v0(eb, ref0));
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}
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#endif
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static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
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u32 item_size)
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{
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if (!IS_ALIGNED(item_size, sizeof(u64))) {
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pr_warn("BTRFS: uuid item with illegal size %lu!\n",
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(unsigned long)item_size);
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return;
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}
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while (item_size) {
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__le64 subvol_id;
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read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
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pr_info("\t\tsubvol_id %llu\n",
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(unsigned long long)le64_to_cpu(subvol_id));
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item_size -= sizeof(u64);
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offset += sizeof(u64);
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}
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}
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/*
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* Helper to output refs and locking status of extent buffer. Useful to debug
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* race condition related problems.
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*/
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static void print_eb_refs_lock(struct extent_buffer *eb)
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{
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#ifdef CONFIG_BTRFS_DEBUG
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btrfs_info(eb->fs_info,
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"refs %u lock (w:%d r:%d bw:%d br:%d sw:%d sr:%d) lock_owner %u current %u",
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atomic_read(&eb->refs), atomic_read(&eb->write_locks),
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atomic_read(&eb->read_locks),
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atomic_read(&eb->blocking_writers),
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atomic_read(&eb->blocking_readers),
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atomic_read(&eb->spinning_writers),
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atomic_read(&eb->spinning_readers),
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eb->lock_owner, current->pid);
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#endif
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}
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void btrfs_print_leaf(struct extent_buffer *l)
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{
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struct btrfs_fs_info *fs_info;
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int i;
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u32 type, nr;
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struct btrfs_item *item;
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struct btrfs_root_item *ri;
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struct btrfs_dir_item *di;
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struct btrfs_inode_item *ii;
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struct btrfs_block_group_item *bi;
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struct btrfs_file_extent_item *fi;
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struct btrfs_extent_data_ref *dref;
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struct btrfs_shared_data_ref *sref;
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struct btrfs_dev_extent *dev_extent;
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struct btrfs_key key;
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struct btrfs_key found_key;
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if (!l)
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return;
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fs_info = l->fs_info;
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nr = btrfs_header_nritems(l);
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btrfs_info(fs_info,
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"leaf %llu gen %llu total ptrs %d free space %d owner %llu",
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btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
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btrfs_leaf_free_space(fs_info, l), btrfs_header_owner(l));
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print_eb_refs_lock(l);
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for (i = 0 ; i < nr ; i++) {
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item = btrfs_item_nr(i);
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btrfs_item_key_to_cpu(l, &key, i);
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type = key.type;
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pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
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i, key.objectid, type, key.offset,
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btrfs_item_offset(l, item), btrfs_item_size(l, item));
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switch (type) {
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case BTRFS_INODE_ITEM_KEY:
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ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
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pr_info("\t\tinode generation %llu size %llu mode %o\n",
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btrfs_inode_generation(l, ii),
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btrfs_inode_size(l, ii),
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btrfs_inode_mode(l, ii));
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break;
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case BTRFS_DIR_ITEM_KEY:
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di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
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btrfs_dir_item_key_to_cpu(l, di, &found_key);
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pr_info("\t\tdir oid %llu type %u\n",
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found_key.objectid,
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btrfs_dir_type(l, di));
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break;
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case BTRFS_ROOT_ITEM_KEY:
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ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
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pr_info("\t\troot data bytenr %llu refs %u\n",
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btrfs_disk_root_bytenr(l, ri),
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btrfs_disk_root_refs(l, ri));
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break;
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case BTRFS_EXTENT_ITEM_KEY:
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case BTRFS_METADATA_ITEM_KEY:
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print_extent_item(l, i, type);
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break;
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case BTRFS_TREE_BLOCK_REF_KEY:
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pr_info("\t\ttree block backref\n");
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break;
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case BTRFS_SHARED_BLOCK_REF_KEY:
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pr_info("\t\tshared block backref\n");
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break;
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case BTRFS_EXTENT_DATA_REF_KEY:
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dref = btrfs_item_ptr(l, i,
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struct btrfs_extent_data_ref);
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print_extent_data_ref(l, dref);
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break;
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case BTRFS_SHARED_DATA_REF_KEY:
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sref = btrfs_item_ptr(l, i,
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struct btrfs_shared_data_ref);
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pr_info("\t\tshared data backref count %u\n",
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btrfs_shared_data_ref_count(l, sref));
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break;
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case BTRFS_EXTENT_DATA_KEY:
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fi = btrfs_item_ptr(l, i,
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struct btrfs_file_extent_item);
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if (btrfs_file_extent_type(l, fi) ==
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BTRFS_FILE_EXTENT_INLINE) {
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pr_info("\t\tinline extent data size %u\n",
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btrfs_file_extent_inline_len(l, i, fi));
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break;
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}
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pr_info("\t\textent data disk bytenr %llu nr %llu\n",
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btrfs_file_extent_disk_bytenr(l, fi),
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btrfs_file_extent_disk_num_bytes(l, fi));
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pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
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btrfs_file_extent_offset(l, fi),
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btrfs_file_extent_num_bytes(l, fi),
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btrfs_file_extent_ram_bytes(l, fi));
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break;
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case BTRFS_EXTENT_REF_V0_KEY:
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#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
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print_extent_ref_v0(l, i);
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#else
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BUG();
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#endif
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break;
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case BTRFS_BLOCK_GROUP_ITEM_KEY:
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bi = btrfs_item_ptr(l, i,
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struct btrfs_block_group_item);
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pr_info(
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"\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
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btrfs_disk_block_group_used(l, bi),
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btrfs_disk_block_group_chunk_objectid(l, bi),
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btrfs_disk_block_group_flags(l, bi));
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break;
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case BTRFS_CHUNK_ITEM_KEY:
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print_chunk(l, btrfs_item_ptr(l, i,
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struct btrfs_chunk));
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break;
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case BTRFS_DEV_ITEM_KEY:
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print_dev_item(l, btrfs_item_ptr(l, i,
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struct btrfs_dev_item));
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break;
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case BTRFS_DEV_EXTENT_KEY:
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dev_extent = btrfs_item_ptr(l, i,
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struct btrfs_dev_extent);
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pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
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btrfs_dev_extent_chunk_tree(l, dev_extent),
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btrfs_dev_extent_chunk_objectid(l, dev_extent),
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btrfs_dev_extent_chunk_offset(l, dev_extent),
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btrfs_dev_extent_length(l, dev_extent));
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break;
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case BTRFS_PERSISTENT_ITEM_KEY:
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pr_info("\t\tpersistent item objectid %llu offset %llu\n",
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key.objectid, key.offset);
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switch (key.objectid) {
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case BTRFS_DEV_STATS_OBJECTID:
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pr_info("\t\tdevice stats\n");
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break;
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default:
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pr_info("\t\tunknown persistent item\n");
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}
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break;
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case BTRFS_TEMPORARY_ITEM_KEY:
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pr_info("\t\ttemporary item objectid %llu offset %llu\n",
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key.objectid, key.offset);
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switch (key.objectid) {
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case BTRFS_BALANCE_OBJECTID:
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pr_info("\t\tbalance status\n");
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break;
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default:
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pr_info("\t\tunknown temporary item\n");
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}
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break;
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case BTRFS_DEV_REPLACE_KEY:
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pr_info("\t\tdev replace\n");
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break;
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case BTRFS_UUID_KEY_SUBVOL:
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case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
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print_uuid_item(l, btrfs_item_ptr_offset(l, i),
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btrfs_item_size_nr(l, i));
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break;
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};
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}
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}
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void btrfs_print_tree(struct extent_buffer *c, bool follow)
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{
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struct btrfs_fs_info *fs_info;
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int i; u32 nr;
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struct btrfs_key key;
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int level;
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if (!c)
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return;
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fs_info = c->fs_info;
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nr = btrfs_header_nritems(c);
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level = btrfs_header_level(c);
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if (level == 0) {
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btrfs_print_leaf(c);
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return;
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}
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btrfs_info(fs_info,
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"node %llu level %d gen %llu total ptrs %d free spc %u owner %llu",
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btrfs_header_bytenr(c), level, btrfs_header_generation(c),
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nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr,
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btrfs_header_owner(c));
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print_eb_refs_lock(c);
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for (i = 0; i < nr; i++) {
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btrfs_node_key_to_cpu(c, &key, i);
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pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n",
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i, key.objectid, key.type, key.offset,
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btrfs_node_blockptr(c, i),
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btrfs_node_ptr_generation(c, i));
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}
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if (!follow)
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return;
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for (i = 0; i < nr; i++) {
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struct btrfs_key first_key;
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struct extent_buffer *next;
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btrfs_node_key_to_cpu(c, &first_key, i);
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next = read_tree_block(fs_info, btrfs_node_blockptr(c, i),
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btrfs_node_ptr_generation(c, i),
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level - 1, &first_key);
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if (IS_ERR(next)) {
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continue;
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} else if (!extent_buffer_uptodate(next)) {
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free_extent_buffer(next);
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continue;
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}
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if (btrfs_is_leaf(next) &&
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level != 1)
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BUG();
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if (btrfs_header_level(next) !=
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level - 1)
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BUG();
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btrfs_print_tree(next, follow);
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free_extent_buffer(next);
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}
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}
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