RepoMirrors
/
btrfs-progs
mirror of https://github.com/kdave/btrfs-progs
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
btrfs-progs/print-tree.c

1532 lines
46 KiB
C
Raw Blame History

/*
* Copyright (C) 2007 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <uuid/uuid.h>
#include "kerncompat.h"
#include "kernel-lib/radix-tree.h"
#include "ctree.h"
#include "disk-io.h"
#include "print-tree.h"
#include "common/utils.h"
static void print_dir_item_type(struct extent_buffer *eb,
struct btrfs_dir_item *di)
{
u8 type = btrfs_dir_type(eb, di);
static const char* dir_item_str[] = {
[BTRFS_FT_REG_FILE] = "FILE",
[BTRFS_FT_DIR] = "DIR",
[BTRFS_FT_CHRDEV] = "CHRDEV",
[BTRFS_FT_BLKDEV] = "BLKDEV",
[BTRFS_FT_FIFO] = "FIFO",
[BTRFS_FT_SOCK] = "SOCK",
[BTRFS_FT_SYMLINK] = "SYMLINK",
[BTRFS_FT_XATTR] = "XATTR"
};
if (type < ARRAY_SIZE(dir_item_str) && dir_item_str[type])
printf("%s", dir_item_str[type]);
else
printf("DIR_ITEM.%u", type);
}
static void print_dir_item(struct extent_buffer *eb, u32 size,
struct btrfs_dir_item *di)
{
u32 cur = 0;
u32 len;
u32 name_len;
u32 data_len;
char namebuf[BTRFS_NAME_LEN];
struct btrfs_disk_key location;
while (cur < size) {
btrfs_dir_item_key(eb, di, &location);
printf("\t\tlocation ");
btrfs_print_key(&location);
printf(" type ");
print_dir_item_type(eb, di);
printf("\n");
name_len = btrfs_dir_name_len(eb, di);
data_len = btrfs_dir_data_len(eb, di);
len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
printf("\t\ttransid %llu data_len %u name_len %u\n",
btrfs_dir_transid(eb, di),
data_len, name_len);
printf("\t\tname: %.*s\n", len, namebuf);
if (data_len) {
len = (data_len <= sizeof(namebuf))? data_len: sizeof(namebuf);
read_extent_buffer(eb, namebuf,
(unsigned long)(di + 1) + name_len, len);
printf("\t\tdata %.*s\n", len, namebuf);
}
len = sizeof(*di) + name_len + data_len;
di = (struct btrfs_dir_item *)((char *)di + len);
cur += len;
}
}
static void print_inode_extref_item(struct extent_buffer *eb, u32 size,
struct btrfs_inode_extref *extref)
{
u32 cur = 0;
u32 len;
u32 name_len = 0;
u64 index = 0;
u64 parent_objid;
char namebuf[BTRFS_NAME_LEN];
while (cur < size) {
index = btrfs_inode_extref_index(eb, extref);
name_len = btrfs_inode_extref_name_len(eb, extref);
parent_objid = btrfs_inode_extref_parent(eb, extref);
len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
read_extent_buffer(eb, namebuf, (unsigned long)(extref->name), len);
printf("\t\tindex %llu parent %llu namelen %u name: %.*s\n",
(unsigned long long)index,
(unsigned long long)parent_objid,
name_len, len, namebuf);
len = sizeof(*extref) + name_len;
extref = (struct btrfs_inode_extref *)((char *)extref + len);
cur += len;
}
}
static void print_inode_ref_item(struct extent_buffer *eb, u32 size,
struct btrfs_inode_ref *ref)
{
u32 cur = 0;
u32 len;
u32 name_len;
u64 index;
char namebuf[BTRFS_NAME_LEN];
while (cur < size) {
name_len = btrfs_inode_ref_name_len(eb, ref);
index = btrfs_inode_ref_index(eb, ref);
len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
printf("\t\tindex %llu namelen %u name: %.*s\n",
(unsigned long long)index, name_len, len, namebuf);
len = sizeof(*ref) + name_len;
ref = (struct btrfs_inode_ref *)((char *)ref + len);
cur += len;
}
}
/* Caller should ensure sizeof(*ret)>=21 "DATA|METADATA|RAID10" */
static void bg_flags_to_str(u64 flags, char *ret)
{
int empty = 1;
if (flags & BTRFS_BLOCK_GROUP_DATA) {
empty = 0;
strcpy(ret, "DATA");
}
if (flags & BTRFS_BLOCK_GROUP_METADATA) {
if (!empty)
strcat(ret, "|");
strcat(ret, "METADATA");
}
if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
if (!empty)
strcat(ret, "|");
strcat(ret, "SYSTEM");
}
switch (flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
case BTRFS_BLOCK_GROUP_RAID0:
strcat(ret, "|RAID0");
break;
case BTRFS_BLOCK_GROUP_RAID1:
strcat(ret, "|RAID1");
break;
case BTRFS_BLOCK_GROUP_RAID1C3:
strcat(ret, "|RAID1C3");
break;
case BTRFS_BLOCK_GROUP_RAID1C4:
strcat(ret, "|RAID1C4");
break;
case BTRFS_BLOCK_GROUP_DUP:
strcat(ret, "|DUP");
break;
case BTRFS_BLOCK_GROUP_RAID10:
strcat(ret, "|RAID10");
break;
case BTRFS_BLOCK_GROUP_RAID5:
strcat(ret, "|RAID5");
break;
case BTRFS_BLOCK_GROUP_RAID6:
strcat(ret, "|RAID6");
break;
default:
break;
}
}
/* Caller should ensure sizeof(*ret)>= 26 "OFF|SCANNING|INCONSISTENT" */
static void qgroup_flags_to_str(u64 flags, char *ret)
{
if (flags & BTRFS_QGROUP_STATUS_FLAG_ON)
strcpy(ret, "ON");
else
strcpy(ret, "OFF");
if (flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN)
strcat(ret, "|SCANNING");
if (flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT)
strcat(ret, "|INCONSISTENT");
}
void print_chunk_item(struct extent_buffer *eb, struct btrfs_chunk *chunk)
{
u16 num_stripes = btrfs_chunk_num_stripes(eb, chunk);
int i;
u32 chunk_item_size;
char chunk_flags_str[32] = {0};
/* The chunk must contain at least one stripe */
if (num_stripes < 1) {
printf("invalid num_stripes: %u\n", num_stripes);
return;
}
chunk_item_size = btrfs_chunk_item_size(num_stripes);
if ((unsigned long)chunk + chunk_item_size > eb->len) {
printf("\t\tchunk item invalid\n");
return;
}
bg_flags_to_str(btrfs_chunk_type(eb, chunk), chunk_flags_str);
printf("\t\tlength %llu owner %llu stripe_len %llu type %s\n",
(unsigned long long)btrfs_chunk_length(eb, chunk),
(unsigned long long)btrfs_chunk_owner(eb, chunk),
(unsigned long long)btrfs_chunk_stripe_len(eb, chunk),
chunk_flags_str);
printf("\t\tio_align %u io_width %u sector_size %u\n",
btrfs_chunk_io_align(eb, chunk),
btrfs_chunk_io_width(eb, chunk),
btrfs_chunk_sector_size(eb, chunk));
printf("\t\tnum_stripes %hu sub_stripes %hu\n", num_stripes,
btrfs_chunk_sub_stripes(eb, chunk));
for (i = 0 ; i < num_stripes ; i++) {
unsigned char dev_uuid[BTRFS_UUID_SIZE];
char str_dev_uuid[BTRFS_UUID_UNPARSED_SIZE];
u64 uuid_offset;
u64 stripe_offset;
uuid_offset = (unsigned long)btrfs_stripe_dev_uuid_nr(chunk, i);
stripe_offset = (unsigned long)btrfs_stripe_nr(chunk, i);
if (uuid_offset < stripe_offset ||
(uuid_offset + BTRFS_UUID_SIZE) >
(stripe_offset + sizeof(struct btrfs_stripe))) {
printf("\t\t\tstripe %d invalid\n", i);
break;
}
read_extent_buffer(eb, dev_uuid,
uuid_offset,
BTRFS_UUID_SIZE);
uuid_unparse(dev_uuid, str_dev_uuid);
printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
(unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
(unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
printf("\t\t\tdev_uuid %s\n", str_dev_uuid);
}
}
static void print_dev_item(struct extent_buffer *eb,
struct btrfs_dev_item *dev_item)
{
char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
char fsid_str[BTRFS_UUID_UNPARSED_SIZE];
u8 uuid[BTRFS_UUID_SIZE];
u8 fsid[BTRFS_UUID_SIZE];
read_extent_buffer(eb, uuid,
(unsigned long)btrfs_device_uuid(dev_item),
BTRFS_UUID_SIZE);
uuid_unparse(uuid, uuid_str);
read_extent_buffer(eb, fsid,
(unsigned long)btrfs_device_fsid(dev_item),
BTRFS_UUID_SIZE);
uuid_unparse(fsid, fsid_str);
printf("\t\tdevid %llu total_bytes %llu bytes_used %Lu\n"
"\t\tio_align %u io_width %u sector_size %u type %llu\n"
"\t\tgeneration %llu start_offset %llu dev_group %u\n"
"\t\tseek_speed %hhu bandwidth %hhu\n"
"\t\tuuid %s\n"
"\t\tfsid %s\n",
(unsigned long long)btrfs_device_id(eb, dev_item),
(unsigned long long)btrfs_device_total_bytes(eb, dev_item),
(unsigned long long)btrfs_device_bytes_used(eb, dev_item),
btrfs_device_io_align(eb, dev_item),
btrfs_device_io_width(eb, dev_item),
btrfs_device_sector_size(eb, dev_item),
(unsigned long long)btrfs_device_type(eb, dev_item),
(unsigned long long)btrfs_device_generation(eb, dev_item),
(unsigned long long)btrfs_device_start_offset(eb, dev_item),
btrfs_device_group(eb, dev_item),
btrfs_device_seek_speed(eb, dev_item),
btrfs_device_bandwidth(eb, dev_item),
uuid_str, fsid_str);
}
static void print_uuids(struct extent_buffer *eb)
{
char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
u8 disk_uuid[BTRFS_UUID_SIZE];
read_extent_buffer(eb, disk_uuid, btrfs_header_fsid(),
BTRFS_FSID_SIZE);
fs_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
uuid_unparse(disk_uuid, fs_uuid);
read_extent_buffer(eb, disk_uuid,
btrfs_header_chunk_tree_uuid(eb),
BTRFS_UUID_SIZE);
chunk_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
uuid_unparse(disk_uuid, chunk_uuid);
printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
}
static void compress_type_to_str(u8 compress_type, char *ret)
{
switch (compress_type) {
case BTRFS_COMPRESS_NONE:
strcpy(ret, "none");
break;
case BTRFS_COMPRESS_ZLIB:
strcpy(ret, "zlib");
break;
case BTRFS_COMPRESS_LZO:
strcpy(ret, "lzo");
break;
case BTRFS_COMPRESS_ZSTD:
strcpy(ret, "zstd");
break;
default:
sprintf(ret, "UNKNOWN.%d", compress_type);
}
}
static const char* file_extent_type_to_str(u8 type)
{
switch (type) {
case BTRFS_FILE_EXTENT_INLINE: return "inline";
case BTRFS_FILE_EXTENT_PREALLOC: return "prealloc";
case BTRFS_FILE_EXTENT_REG: return "regular";
default: return "unknown";
}
}
static void print_file_extent_item(struct extent_buffer *eb,
struct btrfs_item *item,
int slot,
struct btrfs_file_extent_item *fi)
{
unsigned char extent_type = btrfs_file_extent_type(eb, fi);
char compress_str[16];
compress_type_to_str(btrfs_file_extent_compression(eb, fi),
compress_str);
printf("\t\tgeneration %llu type %hhu (%s)\n",
btrfs_file_extent_generation(eb, fi),
extent_type, file_extent_type_to_str(extent_type));
if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
printf("\t\tinline extent data size %u ram_bytes %llu compression %hhu (%s)\n",
btrfs_file_extent_inline_item_len(eb, item),
btrfs_file_extent_ram_bytes(eb, fi),
btrfs_file_extent_compression(eb, fi),
compress_str);
return;
}
if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
printf("\t\tprealloc data disk byte %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
(unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
printf("\t\tprealloc data offset %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_offset(eb, fi),
(unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
return;
}
printf("\t\textent data disk byte %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
(unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
printf("\t\textent data offset %llu nr %llu ram %llu\n",
(unsigned long long)btrfs_file_extent_offset(eb, fi),
(unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
(unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
printf("\t\textent compression %hhu (%s)\n",
btrfs_file_extent_compression(eb, fi),
compress_str);
}
/* Caller should ensure sizeof(*ret) >= 16("DATA|TREE_BLOCK") */
static void extent_flags_to_str(u64 flags, char *ret)
{
int empty = 1;
if (flags & BTRFS_EXTENT_FLAG_DATA) {
empty = 0;
strcpy(ret, "DATA");
}
if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
if (!empty) {
empty = 0;
strcat(ret, "|");
}
strcat(ret, "TREE_BLOCK");
}
if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
strcat(ret, "|");
strcat(ret, "FULL_BACKREF");
}
}
void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
{
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;
int type;
u32 item_size = btrfs_item_size_nr(eb, slot);
u64 flags;
u64 offset;
char flags_str[32] = {0};
if (item_size < sizeof(*ei))
return;
ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
flags = btrfs_extent_flags(eb, ei);
extent_flags_to_str(flags, flags_str);
printf("\t\trefs %llu gen %llu flags %s\n",
(unsigned long long)btrfs_extent_refs(eb, ei),
(unsigned long long)btrfs_extent_generation(eb, ei),
flags_str);
if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !metadata) {
struct btrfs_tree_block_info *info;
info = (struct btrfs_tree_block_info *)(ei + 1);
btrfs_tree_block_key(eb, info, &key);
printf("\t\ttree block ");
btrfs_print_key(&key);
printf(" level %d\n", btrfs_tree_block_level(eb, info));
iref = (struct btrfs_extent_inline_ref *)(info + 1);
} else if (metadata) {
struct btrfs_key tmp;
btrfs_item_key_to_cpu(eb, &tmp, slot);
printf("\t\ttree block skinny level %d\n", (int)tmp.offset);
iref = (struct btrfs_extent_inline_ref *)(ei + 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);
switch (type) {
case BTRFS_TREE_BLOCK_REF_KEY:
printf("\t\ttree block backref root ");
print_objectid(stdout, offset, 0);
printf("\n");
break;
case BTRFS_SHARED_BLOCK_REF_KEY:
printf("\t\tshared block backref parent %llu\n",
(unsigned long long)offset);
break;
case BTRFS_EXTENT_DATA_REF_KEY:
dref = (struct btrfs_extent_data_ref *)(&iref->offset);
printf("\t\textent data backref root ");
print_objectid(stdout,
(unsigned long long)btrfs_extent_data_ref_root(eb, dref), 0);
printf(" objectid %llu offset %llu count %u\n",
(unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
btrfs_extent_data_ref_offset(eb, dref),
btrfs_extent_data_ref_count(eb, dref));
break;
case BTRFS_SHARED_DATA_REF_KEY:
sref = (struct btrfs_shared_data_ref *)(iref + 1);
printf("\t\tshared data backref parent %llu count %u\n",
(unsigned long long)offset,
btrfs_shared_data_ref_count(eb, sref));
break;
default:
return;
}
ptr += btrfs_extent_inline_ref_size(type);
}
WARN_ON(ptr > end);
}
static void print_root_ref(struct extent_buffer *leaf, int slot, const char *tag)
{
struct btrfs_root_ref *ref;
char namebuf[BTRFS_NAME_LEN];
int namelen;
ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
namelen = btrfs_root_ref_name_len(leaf, ref);
read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
(unsigned long long)btrfs_root_ref_dirid(leaf, ref),
(unsigned long long)btrfs_root_ref_sequence(leaf, ref),
namelen, namebuf);
}
static int empty_uuid(const u8 *uuid)
{
int i;
for (i = 0; i < BTRFS_UUID_SIZE; i++)
if (uuid[i])
return 0;
return 1;
}
/*
* Caller must ensure sizeof(*ret) >= 7 "RDONLY"
*/
static void root_flags_to_str(u64 flags, char *ret)
{
if (flags & BTRFS_ROOT_SUBVOL_RDONLY)
strcat(ret, "RDONLY");
else
strcat(ret, "none");
}
static void print_timespec(struct extent_buffer *eb,
struct btrfs_timespec *timespec, const char *prefix,
const char *suffix)
{
struct tm tm;
u64 tmp_u64;
u32 tmp_u32;
time_t tmp_time;
char timestamp[256];
tmp_u64 = btrfs_timespec_sec(eb, timespec);
tmp_u32 = btrfs_timespec_nsec(eb, timespec);
tmp_time = tmp_u64;
localtime_r(&tmp_time, &tm);
strftime(timestamp, sizeof(timestamp),
"%Y-%m-%d %H:%M:%S", &tm);
printf("%s%llu.%u (%s)%s", prefix, (unsigned long long)tmp_u64, tmp_u32,
timestamp, suffix);
}
static void print_root_item(struct extent_buffer *leaf, int slot)
{
struct btrfs_root_item *ri;
struct btrfs_root_item root_item;
int len;
char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
char flags_str[32] = {0};
struct btrfs_key drop_key;
ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
len = btrfs_item_size_nr(leaf, slot);
memset(&root_item, 0, sizeof(root_item));
read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
root_flags_to_str(btrfs_root_flags(&root_item), flags_str);
printf("\t\tgeneration %llu root_dirid %llu bytenr %llu level %hhu refs %u\n",
(unsigned long long)btrfs_root_generation(&root_item),
(unsigned long long)btrfs_root_dirid(&root_item),
(unsigned long long)btrfs_root_bytenr(&root_item),
btrfs_root_level(&root_item),
btrfs_root_refs(&root_item));
printf("\t\tlastsnap %llu byte_limit %llu bytes_used %llu flags 0x%llx(%s)\n",
(unsigned long long)btrfs_root_last_snapshot(&root_item),
(unsigned long long)btrfs_root_limit(&root_item),
(unsigned long long)btrfs_root_used(&root_item),
(unsigned long long)btrfs_root_flags(&root_item),
flags_str);
if (root_item.generation == root_item.generation_v2) {
uuid_unparse(root_item.uuid, uuid_str);
printf("\t\tuuid %s\n", uuid_str);
if (!empty_uuid(root_item.parent_uuid)) {
uuid_unparse(root_item.parent_uuid, uuid_str);
printf("\t\tparent_uuid %s\n", uuid_str);
}
if (!empty_uuid(root_item.received_uuid)) {
uuid_unparse(root_item.received_uuid, uuid_str);
printf("\t\treceived_uuid %s\n", uuid_str);
}
if (root_item.ctransid) {
printf("\t\tctransid %llu otransid %llu stransid %llu rtransid %llu\n",
btrfs_root_ctransid(&root_item),
btrfs_root_otransid(&root_item),
btrfs_root_stransid(&root_item),
btrfs_root_rtransid(&root_item));
}
if (btrfs_timespec_sec(leaf, btrfs_root_ctime(ri)))
print_timespec(leaf, btrfs_root_ctime(ri),
"\t\tctime ", "\n");
if (btrfs_timespec_sec(leaf, btrfs_root_otime(ri)))
print_timespec(leaf, btrfs_root_otime(ri),
"\t\totime ", "\n");
if (btrfs_timespec_sec(leaf, btrfs_root_stime(ri)))
print_timespec(leaf, btrfs_root_stime(ri),
"\t\tstime ", "\n");
if (btrfs_timespec_sec(leaf, btrfs_root_rtime(ri)))
print_timespec(leaf, btrfs_root_rtime(ri),
"\t\trtime ", "\n");
}
btrfs_disk_key_to_cpu(&drop_key, &root_item.drop_progress);
printf("\t\tdrop ");
btrfs_print_key(&root_item.drop_progress);
printf(" level %hhu\n", root_item.drop_level);
}
static void print_free_space_header(struct extent_buffer *leaf, int slot)
{
struct btrfs_free_space_header *header;
struct btrfs_disk_key location;
header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
btrfs_free_space_key(leaf, header, &location);
printf("\t\tlocation ");
btrfs_print_key(&location);
printf("\n");
printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
(unsigned long long)btrfs_free_space_generation(leaf, header),
(unsigned long long)btrfs_free_space_entries(leaf, header),
(unsigned long long)btrfs_free_space_bitmaps(leaf, header));
}
void print_key_type(FILE *stream, u64 objectid, u8 type)
{
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_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_REF_V0_KEY] = "EXTENT_REF_V0",
[BTRFS_CSUM_ITEM_KEY] = "CSUM_ITEM",
[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",
};
if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
fprintf(stream, "UNTYPED");
return;
}
if (key_to_str[type])
fputs(key_to_str[type], stream);
else
fprintf(stream, "UNKNOWN.%d", type);
}
void print_objectid(FILE *stream, u64 objectid, u8 type)
{
switch (type) {
case BTRFS_PERSISTENT_ITEM_KEY:
if (objectid == BTRFS_DEV_STATS_OBJECTID)
fprintf(stream, "DEV_STATS");
else
fprintf(stream, "%llu", (unsigned long long)objectid);
return;
case BTRFS_DEV_EXTENT_KEY:
/* device id */
fprintf(stream, "%llu", (unsigned long long)objectid);
return;
case BTRFS_QGROUP_RELATION_KEY:
fprintf(stream, "%llu/%llu", btrfs_qgroup_level(objectid),
btrfs_qgroup_subvid(objectid));
return;
case BTRFS_UUID_KEY_SUBVOL:
case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
fprintf(stream, "0x%016llx", (unsigned long long)objectid);
return;
}
switch (objectid) {
case BTRFS_ROOT_TREE_OBJECTID:
/*
* BTRFS_ROOT_TREE_OBJECTID and BTRFS_DEV_ITEMS_OBJECTID are
* defined with the same value 1, we need to distinguish them
* by the type.
*/
if (type == BTRFS_DEV_ITEM_KEY)
fprintf(stream, "DEV_ITEMS");
else
fprintf(stream, "ROOT_TREE");
break;
case BTRFS_EXTENT_TREE_OBJECTID:
fprintf(stream, "EXTENT_TREE");
break;
case BTRFS_CHUNK_TREE_OBJECTID:
fprintf(stream, "CHUNK_TREE");
break;
case BTRFS_DEV_TREE_OBJECTID:
fprintf(stream, "DEV_TREE");
break;
case BTRFS_FS_TREE_OBJECTID:
fprintf(stream, "FS_TREE");
break;
case BTRFS_ROOT_TREE_DIR_OBJECTID:
fprintf(stream, "ROOT_TREE_DIR");
break;
case BTRFS_CSUM_TREE_OBJECTID:
fprintf(stream, "CSUM_TREE");
break;
case BTRFS_BALANCE_OBJECTID:
fprintf(stream, "BALANCE");
break;
case BTRFS_ORPHAN_OBJECTID:
fprintf(stream, "ORPHAN");
break;
case BTRFS_TREE_LOG_OBJECTID:
fprintf(stream, "TREE_LOG");
break;
case BTRFS_TREE_LOG_FIXUP_OBJECTID:
fprintf(stream, "LOG_FIXUP");
break;
case BTRFS_TREE_RELOC_OBJECTID:
fprintf(stream, "TREE_RELOC");
break;
case BTRFS_DATA_RELOC_TREE_OBJECTID:
fprintf(stream, "DATA_RELOC_TREE");
break;
case BTRFS_EXTENT_CSUM_OBJECTID:
fprintf(stream, "EXTENT_CSUM");
break;
case BTRFS_FREE_SPACE_OBJECTID:
fprintf(stream, "FREE_SPACE");
break;
case BTRFS_FREE_INO_OBJECTID:
fprintf(stream, "FREE_INO");
break;
case BTRFS_QUOTA_TREE_OBJECTID:
fprintf(stream, "QUOTA_TREE");
break;
case BTRFS_UUID_TREE_OBJECTID:
fprintf(stream, "UUID_TREE");
break;
case BTRFS_FREE_SPACE_TREE_OBJECTID:
fprintf(stream, "FREE_SPACE_TREE");
break;
case BTRFS_MULTIPLE_OBJECTIDS:
fprintf(stream, "MULTIPLE");
break;
case (u64)-1:
fprintf(stream, "-1");
break;
case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
if (type == BTRFS_CHUNK_ITEM_KEY) {
fprintf(stream, "FIRST_CHUNK_TREE");
break;
}
/* fall-thru */
default:
fprintf(stream, "%llu", (unsigned long long)objectid);
}
}
void btrfs_print_key(struct btrfs_disk_key *disk_key)
{
u64 objectid = btrfs_disk_key_objectid(disk_key);
u8 type = btrfs_disk_key_type(disk_key);
u64 offset = btrfs_disk_key_offset(disk_key);
printf("key (");
print_objectid(stdout, objectid, type);
printf(" ");
print_key_type(stdout, objectid, type);
switch (type) {
case BTRFS_QGROUP_RELATION_KEY:
case BTRFS_QGROUP_INFO_KEY:
case BTRFS_QGROUP_LIMIT_KEY:
printf(" %llu/%llu)", btrfs_qgroup_level(offset),
btrfs_qgroup_subvid(offset));
break;
case BTRFS_UUID_KEY_SUBVOL:
case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
printf(" 0x%016llx)", (unsigned long long)offset);
break;
/*
* Key offsets of ROOT_ITEM point to tree root, print them in human
* readable format. Especially useful for trees like data/tree reloc
* tree, whose tree id can be negative.
*/
case BTRFS_ROOT_ITEM_KEY:
printf(" ");
/*
* Normally offset of ROOT_ITEM should present the generation
* of creation time of the root.
* However if this is reloc tree, offset is the subvolume
* id of its source. Here we do extra check on this.
*/
if (objectid == BTRFS_TREE_RELOC_OBJECTID)
print_objectid(stdout, offset, type);
else
printf("%llu", offset);
printf(")");
break;
default:
if (offset == (u64)-1)
printf(" -1)");
else
printf(" %llu)", (unsigned long long)offset);
break;
}
}
static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
u32 item_size)
{
if (item_size & (sizeof(u64) - 1)) {
printf("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(u64));
printf("\t\tsubvol_id %llu\n",
(unsigned long long)le64_to_cpu(subvol_id));
item_size -= sizeof(u64);
offset += sizeof(u64);
}
}
/* Btrfs inode flag stringification helper */
#define STRCAT_ONE_INODE_FLAG(flags, name, empty, dst) ({ \
if (flags & BTRFS_INODE_##name) { \
if (!empty) \
strcat(dst, "|"); \
strcat(dst, #name); \
empty = 0; \
} \
})
/*
* Caller should ensure sizeof(*ret) >= 102: all characters plus '|' of
* BTRFS_INODE_* flags
*/
static void inode_flags_to_str(u64 flags, char *ret)
{
int empty = 1;
STRCAT_ONE_INODE_FLAG(flags, NODATASUM, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, NODATACOW, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, READONLY, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, NOCOMPRESS, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, PREALLOC, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, SYNC, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, IMMUTABLE, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, APPEND, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, NODUMP, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, NOATIME, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, DIRSYNC, empty, ret);
STRCAT_ONE_INODE_FLAG(flags, COMPRESS, empty, ret);
if (empty)
strcat(ret, "none");
}
static void print_inode_item(struct extent_buffer *eb,
struct btrfs_inode_item *ii)
{
char flags_str[256];
memset(flags_str, 0, sizeof(flags_str));
inode_flags_to_str(btrfs_inode_flags(eb, ii), flags_str);
printf("\t\tgeneration %llu transid %llu size %llu nbytes %llu\n"
"\t\tblock group %llu mode %o links %u uid %u gid %u rdev %llu\n"
"\t\tsequence %llu flags 0x%llx(%s)\n",
(unsigned long long)btrfs_inode_generation(eb, ii),
(unsigned long long)btrfs_inode_transid(eb, ii),
(unsigned long long)btrfs_inode_size(eb, ii),
(unsigned long long)btrfs_inode_nbytes(eb, ii),
(unsigned long long)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),
(unsigned long long)btrfs_inode_rdev(eb,ii),
(unsigned long long)btrfs_inode_sequence(eb, ii),
(unsigned long long)btrfs_inode_flags(eb,ii),
flags_str);
print_timespec(eb, btrfs_inode_atime(ii), "\t\tatime ", "\n");
print_timespec(eb, btrfs_inode_ctime(ii), "\t\tctime ", "\n");
print_timespec(eb, btrfs_inode_mtime(ii), "\t\tmtime ", "\n");
print_timespec(eb, btrfs_inode_otime(ii), "\t\totime ", "\n");
}
static void print_disk_balance_args(struct btrfs_disk_balance_args *ba)
{
printf("\t\tprofiles %llu devid %llu target %llu flags %llu\n",
(unsigned long long)le64_to_cpu(ba->profiles),
(unsigned long long)le64_to_cpu(ba->devid),
(unsigned long long)le64_to_cpu(ba->target),
(unsigned long long)le64_to_cpu(ba->flags));
printf("\t\tusage_min %u usage_max %u pstart %llu pend %llu\n",
le32_to_cpu(ba->usage_min),
le32_to_cpu(ba->usage_max),
(unsigned long long)le64_to_cpu(ba->pstart),
(unsigned long long)le64_to_cpu(ba->pend));
printf("\t\tvstart %llu vend %llu limit_min %u limit_max %u\n",
(unsigned long long)le64_to_cpu(ba->vstart),
(unsigned long long)le64_to_cpu(ba->vend),
le32_to_cpu(ba->limit_min),
le32_to_cpu(ba->limit_max));
printf("\t\tstripes_min %u stripes_max %u\n",
le32_to_cpu(ba->stripes_min),
le32_to_cpu(ba->stripes_max));
}
static void print_balance_item(struct extent_buffer *eb,
struct btrfs_balance_item *bi)
{
printf("\t\tbalance status flags %llu\n",
btrfs_balance_item_flags(eb, bi));
printf("\t\tDATA\n");
print_disk_balance_args(btrfs_balance_item_data(eb, bi));
printf("\t\tMETADATA\n");
print_disk_balance_args(btrfs_balance_item_meta(eb, bi));
printf("\t\tSYSTEM\n");
print_disk_balance_args(btrfs_balance_item_sys(eb, bi));
}
static void print_dev_stats(struct extent_buffer *eb,
struct btrfs_dev_stats_item *stats, u32 size)
{
u32 known = BTRFS_DEV_STAT_VALUES_MAX * sizeof(__le64);
int i;
printf("\t\tdevice stats\n");
printf("\t\twrite_errs %llu read_errs %llu flush_errs %llu corruption_errs %llu generation %llu\n",
btrfs_dev_stats_value(eb, stats, BTRFS_DEV_STAT_WRITE_ERRS),
btrfs_dev_stats_value(eb, stats, BTRFS_DEV_STAT_READ_ERRS),
btrfs_dev_stats_value(eb, stats, BTRFS_DEV_STAT_FLUSH_ERRS),
btrfs_dev_stats_value(eb, stats, BTRFS_DEV_STAT_CORRUPTION_ERRS),
btrfs_dev_stats_value(eb, stats, BTRFS_DEV_STAT_GENERATION_ERRS));
if (known < size) {
printf("\t\tunknown stats item bytes %u", size - known);
for (i = BTRFS_DEV_STAT_VALUES_MAX; i * sizeof(__le64) < size; i++) {
printf("\t\tunknown item %d offset %zu value %llu\n",
i, i * sizeof(__le64),
btrfs_dev_stats_value(eb, stats, i));
}
}
}
static void print_block_group_item(struct extent_buffer *eb,
struct btrfs_block_group_item *bgi)
{
struct btrfs_block_group_item bg_item;
char flags_str[256];
read_extent_buffer(eb, &bg_item, (unsigned long)bgi, sizeof(bg_item));
memset(flags_str, 0, sizeof(flags_str));
bg_flags_to_str(btrfs_block_group_flags(&bg_item), flags_str);
printf("\t\tblock group used %llu chunk_objectid %llu flags %s\n",
(unsigned long long)btrfs_block_group_used(&bg_item),
(unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
flags_str);
}
static void print_extent_data_ref(struct extent_buffer *eb, int slot)
{
struct btrfs_extent_data_ref *dref;
dref = btrfs_item_ptr(eb, slot, struct btrfs_extent_data_ref);
printf("\t\textent data backref root ");
print_objectid(stdout,
(unsigned long long)btrfs_extent_data_ref_root(eb, dref), 0);
printf(" objectid %llu offset %llu count %u\n",
(unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
(unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
btrfs_extent_data_ref_count(eb, dref));
}
static void print_shared_data_ref(struct extent_buffer *eb, int slot)
{
struct btrfs_shared_data_ref *sref;
sref = btrfs_item_ptr(eb, slot, struct btrfs_shared_data_ref);
printf("\t\tshared data backref count %u\n",
btrfs_shared_data_ref_count(eb, sref));
}
static void print_free_space_info(struct extent_buffer *eb, int slot)
{
struct btrfs_free_space_info *free_info;
free_info = btrfs_item_ptr(eb, slot, struct btrfs_free_space_info);
printf("\t\tfree space info extent count %u flags %u\n",
(unsigned)btrfs_free_space_extent_count(eb, free_info),
(unsigned)btrfs_free_space_flags(eb, free_info));
}
static void print_dev_extent(struct extent_buffer *eb, int slot)
{
struct btrfs_dev_extent *dev_extent;
u8 uuid[BTRFS_UUID_SIZE];
char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
dev_extent = btrfs_item_ptr(eb, slot, struct btrfs_dev_extent);
read_extent_buffer(eb, uuid,
(unsigned long)btrfs_dev_extent_chunk_tree_uuid(dev_extent),
BTRFS_UUID_SIZE);
uuid_unparse(uuid, uuid_str);
printf("\t\tdev extent chunk_tree %llu\n"
"\t\tchunk_objectid %llu chunk_offset %llu "
"length %llu\n"
"\t\tchunk_tree_uuid %s\n",
(unsigned long long)btrfs_dev_extent_chunk_tree(eb, dev_extent),
(unsigned long long)btrfs_dev_extent_chunk_objectid(eb, dev_extent),
(unsigned long long)btrfs_dev_extent_chunk_offset(eb, dev_extent),
(unsigned long long)btrfs_dev_extent_length(eb, dev_extent),
uuid_str);
}
static void print_qgroup_status(struct extent_buffer *eb, int slot)
{
struct btrfs_qgroup_status_item *qg_status;
char flags_str[256];
qg_status = btrfs_item_ptr(eb, slot, struct btrfs_qgroup_status_item);
memset(flags_str, 0, sizeof(flags_str));
qgroup_flags_to_str(btrfs_qgroup_status_flags(eb, qg_status),
flags_str);
printf("\t\tversion %llu generation %llu flags %s scan %llu\n",
(unsigned long long)btrfs_qgroup_status_version(eb, qg_status),
(unsigned long long)btrfs_qgroup_status_generation(eb, qg_status),
flags_str,
(unsigned long long)btrfs_qgroup_status_rescan(eb, qg_status));
}
static void print_qgroup_info(struct extent_buffer *eb, int slot)
{
struct btrfs_qgroup_info_item *qg_info;
qg_info = btrfs_item_ptr(eb, slot, struct btrfs_qgroup_info_item);
printf("\t\tgeneration %llu\n"
"\t\treferenced %llu referenced_compressed %llu\n"
"\t\texclusive %llu exclusive_compressed %llu\n",
(unsigned long long)btrfs_qgroup_info_generation(eb, qg_info),
(unsigned long long)btrfs_qgroup_info_referenced(eb, qg_info),
(unsigned long long)btrfs_qgroup_info_referenced_compressed(eb,
qg_info),
(unsigned long long)btrfs_qgroup_info_exclusive(eb, qg_info),
(unsigned long long)btrfs_qgroup_info_exclusive_compressed(eb,
qg_info));
}
static void print_qgroup_limit(struct extent_buffer *eb, int slot)
{
struct btrfs_qgroup_limit_item *qg_limit;
qg_limit = btrfs_item_ptr(eb, slot, struct btrfs_qgroup_limit_item);
printf("\t\tflags %llx\n"
"\t\tmax_referenced %lld max_exclusive %lld\n"
"\t\trsv_referenced %lld rsv_exclusive %lld\n",
(unsigned long long)btrfs_qgroup_limit_flags(eb, qg_limit),
(long long)btrfs_qgroup_limit_max_referenced(eb, qg_limit),
(long long)btrfs_qgroup_limit_max_exclusive(eb, qg_limit),
(long long)btrfs_qgroup_limit_rsv_referenced(eb, qg_limit),
(long long)btrfs_qgroup_limit_rsv_exclusive(eb, qg_limit));
}
static void print_persistent_item(struct extent_buffer *eb, void *ptr,
u32 item_size, u64 objectid, u64 offset)
{
printf("\t\tpersistent item objectid ");
print_objectid(stdout, objectid, BTRFS_PERSISTENT_ITEM_KEY);
printf(" offset %llu\n", (unsigned long long)offset);
switch (objectid) {
case BTRFS_DEV_STATS_OBJECTID:
print_dev_stats(eb, ptr, item_size);
break;
default:
printf("\t\tunknown persistent item objectid %llu\n", objectid);
}
}
static void print_temporary_item(struct extent_buffer *eb, void *ptr,
u64 objectid, u64 offset)
{
printf("\t\ttemporary item objectid ");
print_objectid(stdout, objectid, BTRFS_TEMPORARY_ITEM_KEY);
printf(" offset %llu\n", (unsigned long long)offset);
switch (objectid) {
case BTRFS_BALANCE_OBJECTID:
print_balance_item(eb, ptr);
break;
default:
printf("\t\tunknown temporary item objectid %llu\n", objectid);
}
}
static void print_extent_csum(struct extent_buffer *eb,
struct btrfs_fs_info *fs_info, u32 item_size, u64 start)
{
u32 size;
/*
* If we don't have fs_info, only output its start position as we
* don't have sectorsize for the calculation
*/
if (!fs_info) {
printf("\t\trange start %llu\n", (unsigned long long)start);
return;
}
size = (item_size / btrfs_super_csum_size(fs_info->super_copy)) *
fs_info->sectorsize;
printf("\t\trange start %llu end %llu length %u\n",
(unsigned long long)start,
(unsigned long long)start + size, size);
}
/* Caller must ensure sizeof(*ret) >= 14 "WRITTEN|RELOC" */
static void header_flags_to_str(u64 flags, char *ret)
{
int empty = 1;
if (flags & BTRFS_HEADER_FLAG_WRITTEN) {
empty = 0;
strcpy(ret, "WRITTEN");
}
if (flags & BTRFS_HEADER_FLAG_RELOC) {
if (!empty)
strcat(ret, "|");
strcat(ret, "RELOC");
}
}
void btrfs_print_leaf(struct extent_buffer *eb)
{
struct btrfs_fs_info *fs_info = eb->fs_info;
struct btrfs_item *item;
struct btrfs_disk_key disk_key;
char flags_str[128];
u32 leaf_data_size = BTRFS_LEAF_DATA_SIZE(fs_info);
u32 i;
u32 nr;
u64 flags;
u8 backref_rev;
flags = btrfs_header_flags(eb) & ~BTRFS_BACKREF_REV_MASK;
backref_rev = btrfs_header_flags(eb) >> BTRFS_BACKREF_REV_SHIFT;
header_flags_to_str(flags, flags_str);
nr = btrfs_header_nritems(eb);
printf("leaf %llu items %u free space %d generation %llu owner ",
(unsigned long long)btrfs_header_bytenr(eb), nr,
btrfs_leaf_free_space(eb),
(unsigned long long)btrfs_header_generation(eb));
print_objectid(stdout, btrfs_header_owner(eb), 0);
printf("\n");
printf("leaf %llu flags 0x%llx(%s) backref revision %d\n",
btrfs_header_bytenr(eb), flags, flags_str, backref_rev);
print_uuids(eb);
fflush(stdout);
for (i = 0; i < nr; i++) {
u32 item_size;
void *ptr;
u64 objectid;
u32 type;
u64 offset;
/*
* Extra check on item pointers
* Here we don't need to be as strict as kernel leaf check.
* Only need to ensure all pointers are pointing range inside
* the leaf, thus no segfault.
*/
if (btrfs_item_offset_nr(eb, i) > leaf_data_size ||
btrfs_item_size_nr(eb, i) + btrfs_item_offset_nr(eb, i) >
leaf_data_size) {
error(
"leaf %llu slot %u pointer invalid, offset %u size %u leaf data limit %u",
btrfs_header_bytenr(eb), i,
btrfs_item_offset_nr(eb, i),
btrfs_item_size_nr(eb, i), leaf_data_size);
error("skip remaining slots");
break;
}
item = btrfs_item_nr(i);
item_size = btrfs_item_size(eb, item);
/* Untyped extraction of slot from btrfs_item_ptr */
ptr = btrfs_item_ptr(eb, i, void*);
btrfs_item_key(eb, &disk_key, i);
objectid = btrfs_disk_key_objectid(&disk_key);
type = btrfs_disk_key_type(&disk_key);
offset = btrfs_disk_key_offset(&disk_key);
printf("\titem %u ", i);
btrfs_print_key(&disk_key);
printf(" itemoff %u itemsize %u\n",
btrfs_item_offset(eb, item),
btrfs_item_size(eb, item));
if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
print_free_space_header(eb, i);
switch (type) {
case BTRFS_INODE_ITEM_KEY:
print_inode_item(eb, ptr);
break;
case BTRFS_INODE_REF_KEY:
print_inode_ref_item(eb, item_size, ptr);
break;
case BTRFS_INODE_EXTREF_KEY:
print_inode_extref_item(eb, item_size, ptr);
break;
case BTRFS_DIR_ITEM_KEY:
case BTRFS_DIR_INDEX_KEY:
case BTRFS_XATTR_ITEM_KEY:
print_dir_item(eb, item_size, ptr);
break;
case BTRFS_DIR_LOG_INDEX_KEY:
case BTRFS_DIR_LOG_ITEM_KEY: {
struct btrfs_dir_log_item *dlog;
dlog = btrfs_item_ptr(eb, i, struct btrfs_dir_log_item);
printf("\t\tdir log end %Lu\n",
(unsigned long long)btrfs_dir_log_end(eb, dlog));
break;
}
case BTRFS_ORPHAN_ITEM_KEY:
printf("\t\torphan item\n");
break;
case BTRFS_ROOT_ITEM_KEY:
print_root_item(eb, i);
break;
case BTRFS_ROOT_REF_KEY:
print_root_ref(eb, i, "ref");
break;
case BTRFS_ROOT_BACKREF_KEY:
print_root_ref(eb, i, "backref");
break;
case BTRFS_EXTENT_ITEM_KEY:
print_extent_item(eb, i, 0);
break;
case BTRFS_METADATA_ITEM_KEY:
print_extent_item(eb, i, 1);
break;
case BTRFS_TREE_BLOCK_REF_KEY:
printf("\t\ttree block backref\n");
break;
case BTRFS_SHARED_BLOCK_REF_KEY:
printf("\t\tshared block backref\n");
break;
case BTRFS_EXTENT_DATA_REF_KEY:
print_extent_data_ref(eb, i);
break;
case BTRFS_SHARED_DATA_REF_KEY:
print_shared_data_ref(eb, i);
break;
case BTRFS_EXTENT_REF_V0_KEY:
printf("\t\textent ref v0 (deprecated)\n");
break;
case BTRFS_CSUM_ITEM_KEY:
printf("\t\tcsum item\n");
break;
case BTRFS_EXTENT_CSUM_KEY:
print_extent_csum(eb, fs_info, item_size,
offset);
break;
case BTRFS_EXTENT_DATA_KEY:
print_file_extent_item(eb, item, i, ptr);
break;
case BTRFS_BLOCK_GROUP_ITEM_KEY:
print_block_group_item(eb, ptr);
break;
case BTRFS_FREE_SPACE_INFO_KEY:
print_free_space_info(eb, i);
break;
case BTRFS_FREE_SPACE_EXTENT_KEY:
printf("\t\tfree space extent\n");
break;
case BTRFS_FREE_SPACE_BITMAP_KEY:
printf("\t\tfree space bitmap\n");
break;
case BTRFS_CHUNK_ITEM_KEY:
print_chunk_item(eb, ptr);
break;
case BTRFS_DEV_ITEM_KEY:
print_dev_item(eb, ptr);
break;
case BTRFS_DEV_EXTENT_KEY:
print_dev_extent(eb, i);
break;
case BTRFS_QGROUP_STATUS_KEY:
print_qgroup_status(eb, i);
break;
case BTRFS_QGROUP_RELATION_KEY:
break;
case BTRFS_QGROUP_INFO_KEY:
print_qgroup_info(eb, i);
break;
case BTRFS_QGROUP_LIMIT_KEY:
print_qgroup_limit(eb, i);
break;
case BTRFS_UUID_KEY_SUBVOL:
case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
print_uuid_item(eb, btrfs_item_ptr_offset(eb, i),
btrfs_item_size_nr(eb, i));
break;
case BTRFS_STRING_ITEM_KEY: {
const char *str = eb->data + btrfs_item_ptr_offset(eb, i);
printf("\t\titem data %.*s\n", item_size, str);
break;
}
case BTRFS_PERSISTENT_ITEM_KEY:
print_persistent_item(eb, ptr, item_size, objectid,
offset);
break;
case BTRFS_TEMPORARY_ITEM_KEY:
print_temporary_item(eb, ptr, objectid, offset);
break;
};
fflush(stdout);
}
}
/* Helper function to reach the leftmost tree block at @path->lowest_level */
static int search_leftmost_tree_block(struct btrfs_fs_info *fs_info,
struct btrfs_path *path, int root_level)
{
int i;
int ret = 0;
/* Release all nodes except path->nodes[root_level] */
for (i = 0; i < root_level; i++) {
path->slots[i] = 0;
if (!path->nodes[i])
continue;
free_extent_buffer(path->nodes[i]);
}
/* Reach the leftmost tree block by always reading out slot 0 */
for (i = root_level; i > path->lowest_level; i--) {
struct extent_buffer *eb;
path->slots[i] = 0;
eb = read_node_slot(fs_info, path->nodes[i], 0);
if (!extent_buffer_uptodate(eb)) {
ret = -EIO;
goto out;
}
path->nodes[i - 1] = eb;
}
out:
return ret;
}
static void bfs_print_children(struct extent_buffer *root_eb)
{
struct btrfs_fs_info *fs_info = root_eb->fs_info;
struct btrfs_path path;
int root_level = btrfs_header_level(root_eb);
int cur_level;
int ret;
if (root_level < 1)
return;
btrfs_init_path(&path);
/* For path */
extent_buffer_get(root_eb);
path.nodes[root_level] = root_eb;
for (cur_level = root_level - 1; cur_level >= 0; cur_level--) {
path.lowest_level = cur_level;
/* Use the leftmost tree block as a starting point */
ret = search_leftmost_tree_block(fs_info, &path, root_level);
if (ret < 0)
goto out;
/* Print all sibling tree blocks */
while (1) {
btrfs_print_tree(path.nodes[cur_level], 0,
BTRFS_PRINT_TREE_BFS);
ret = btrfs_next_sibling_tree_block(fs_info, &path);
if (ret < 0)
goto out;
if (ret > 0) {
ret = 0;
break;
}
}
}
out:
btrfs_release_path(&path);
return;
}
static void dfs_print_children(struct extent_buffer *root_eb)
{
struct btrfs_fs_info *fs_info = root_eb->fs_info;
struct extent_buffer *next;
int nr = btrfs_header_nritems(root_eb);
int root_eb_level = btrfs_header_level(root_eb);
int i;
for (i = 0; i < nr; i++) {
next = read_tree_block(fs_info, btrfs_node_blockptr(root_eb, i),
btrfs_node_ptr_generation(root_eb, i));
if (!extent_buffer_uptodate(next)) {
fprintf(stderr, "failed to read %llu in tree %llu\n",
btrfs_node_blockptr(root_eb, i),
btrfs_header_owner(root_eb));
continue;
}
if (btrfs_header_level(next) != root_eb_level - 1) {
warning(
"eb corrupted: parent bytenr %llu slot %d level %d child bytenr %llu level has %d expect %d, skipping the slot",
btrfs_header_bytenr(root_eb), i, root_eb_level,
btrfs_header_bytenr(next),
btrfs_header_level(next), root_eb_level - 1);
free_extent_buffer(next);
continue;
}
btrfs_print_tree(next, 1, BTRFS_PRINT_TREE_DFS);
free_extent_buffer(next);
}
}
void btrfs_print_tree(struct extent_buffer *eb, bool follow, int traverse)
{
u32 i;
u32 nr;
u32 ptr_num;
struct btrfs_fs_info *fs_info = eb->fs_info;
struct btrfs_disk_key disk_key;
struct btrfs_key key;
if (!eb)
return;
if (traverse != BTRFS_PRINT_TREE_DFS && traverse != BTRFS_PRINT_TREE_BFS)
traverse = BTRFS_PRINT_TREE_DEFAULT;
nr = btrfs_header_nritems(eb);
if (btrfs_is_leaf(eb)) {
btrfs_print_leaf(eb);
return;
}
/* We are crossing eb boundary, this node must be corrupted */
if (nr > BTRFS_NODEPTRS_PER_EXTENT_BUFFER(eb))
warning(
"node nr_items corrupted, has %u limit %u, continue anyway",
nr, BTRFS_NODEPTRS_PER_EXTENT_BUFFER(eb));
printf("node %llu level %d items %u free %u generation %llu owner ",
(unsigned long long)eb->start,
btrfs_header_level(eb), nr,
(u32)BTRFS_NODEPTRS_PER_EXTENT_BUFFER(eb) - nr,
(unsigned long long)btrfs_header_generation(eb));
print_objectid(stdout, btrfs_header_owner(eb), 0);
printf("\n");
print_uuids(eb);
fflush(stdout);
ptr_num = BTRFS_NODEPTRS_PER_EXTENT_BUFFER(eb);
for (i = 0; i < nr && i < ptr_num; i++) {
u64 blocknr = btrfs_node_blockptr(eb, i);
btrfs_node_key(eb, &disk_key, i);
btrfs_disk_key_to_cpu(&key, &disk_key);
printf("\t");
btrfs_print_key(&disk_key);
printf(" block %llu gen %llu\n",
(unsigned long long)blocknr,
(unsigned long long)btrfs_node_ptr_generation(eb, i));
fflush(stdout);
}
if (!follow)
return;
if (follow && !fs_info)
return;
if (traverse == BTRFS_PRINT_TREE_DFS)
dfs_print_children(eb);
else
bfs_print_children(eb);
return;
}
Reference in New Issue View Git Blame Copy Permalink