btrfs-progs/print-tree.c

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2007-06-12 13:07:11 +00:00
/*
* 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.
*/
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#include <stdio.h>
#include <stdlib.h>
#include <uuid/uuid.h>
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#include "kerncompat.h"
#include "radix-tree.h"
#include "ctree.h"
#include "disk-io.h"
#include "print-tree.h"
#include "utils.h"
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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;
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u64 index;
char namebuf[BTRFS_NAME_LEN];
while (cur < size) {
name_len = btrfs_inode_ref_name_len(eb, ref);
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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_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 %u compression %hhu (%s)\n",
btrfs_file_extent_inline_item_len(eb, item),
btrfs_file_extent_inline_len(eb, slot, 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)) {
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
struct btrfs_extent_item_v0 *ei0;
BUG_ON(item_size != sizeof(*ei0));
ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
printf("\t\trefs %u\n",
btrfs_extent_refs_v0(eb, ei0));
return;
#else
BUG();
#endif
}
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 %llu\n",
(unsigned long long)offset);
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 %llu "
"objectid %llu offset %llu count %u\n",
(unsigned long long)btrfs_extent_data_ref_root(eb, dref),
(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));
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);
}
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
{
struct btrfs_extent_ref_v0 *ref0;
ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
printf("\t\textent back ref root %llu gen %llu "
"owner %llu num_refs %lu\n",
(unsigned long long)btrfs_ref_root_v0(eb, ref0),
(unsigned long long)btrfs_ref_generation_v0(eb, ref0),
(unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
(unsigned long)btrfs_ref_count_v0(eb, ref0));
}
#endif
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_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:
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("%lld", 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 charactors 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)
{
int i;
u32 known = BTRFS_DEV_STAT_VALUES_MAX * sizeof(__le64);
__le64 *values = btrfs_dev_stats_values(eb, stats);
printf("\t\tdevice stats\n");
printf("\t\twrite_errs %llu read_errs %llu flush_errs %llu corruption_errs %llu generation %llu\n",
(unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_WRITE_ERRS]),
(unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_READ_ERRS]),
(unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_FLUSH_ERRS]),
(unsigned long long)le64_to_cpu(values[BTRFS_DEV_STAT_CORRUPTION_ERRS]),
(unsigned long long)le64_to_cpu(values[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 %u offset %zu value %llu\n",
i, i * sizeof(__le64),
(unsigned long long)le64_to_cpu(values[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 %llu "
"objectid %llu offset %llu count %u\n",
(unsigned long long)btrfs_extent_data_ref_root(eb, dref),
(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 %lld\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;
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)
2007-02-24 11:24:44 +00:00
{
struct btrfs_fs_info *fs_info = eb->fs_info;
2007-03-13 00:12:07 +00:00
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 %d free space %d generation %llu owner ",
(unsigned long long)btrfs_header_bytenr(eb), nr,
btrfs_leaf_free_space(fs_info, 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);
2007-02-24 11:24:44 +00:00
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 %d ", i);
btrfs_print_key(&disk_key);
printf(" itemoff %d itemsize %d\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:
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case BTRFS_DIR_INDEX_KEY:
case BTRFS_XATTR_ITEM_KEY:
print_dir_item(eb, item_size, ptr);
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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:
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
print_extent_ref_v0(eb, i);
#else
BUG();
#endif
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);
Btrfs: move data checksumming into a dedicated tree Btrfs stores checksums for each data block. Until now, they have been stored in the subvolume trees, indexed by the inode that is referencing the data block. This means that when we read the inode, we've probably read in at least some checksums as well. But, this has a few problems: * The checksums are indexed by logical offset in the file. When compression is on, this means we have to do the expensive checksumming on the uncompressed data. It would be faster if we could checksum the compressed data instead. * If we implement encryption, we'll be checksumming the plain text and storing that on disk. This is significantly less secure. * For either compression or encryption, we have to get the plain text back before we can verify the checksum as correct. This makes the raid layer balancing and extent moving much more expensive. * It makes the front end caching code more complex, as we have touch the subvolume and inodes as we cache extents. * There is potentitally one copy of the checksum in each subvolume referencing an extent. The solution used here is to store the extent checksums in a dedicated tree. This allows us to index the checksums by phyiscal extent start and length. It means: * The checksum is against the data stored on disk, after any compression or encryption is done. * The checksum is stored in a central location, and can be verified without following back references, or reading inodes. This makes compression significantly faster by reducing the amount of data that needs to be checksummed. It will also allow much faster raid management code in general. The checksums are indexed by a key with a fixed objectid (a magic value in ctree.h) and offset set to the starting byte of the extent. This allows us to copy the checksum items into the fsync log tree directly (or any other tree), without having to invent a second format for them. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-12-08 22:00:31 +00:00
break;
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case BTRFS_EXTENT_DATA_KEY:
print_file_extent_item(eb, item, i, ptr);
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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);
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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;
};
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fflush(stdout);
}
}
void btrfs_print_tree(struct extent_buffer *eb, int follow)
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{
u32 i;
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u32 nr;
struct btrfs_fs_info *fs_info = eb->fs_info;
struct btrfs_disk_key disk_key;
struct btrfs_key key;
struct extent_buffer *next;
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if (!eb)
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return;
nr = btrfs_header_nritems(eb);
if (btrfs_is_leaf(eb)) {
btrfs_print_leaf(eb);
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return;
}
printf("node %llu level %d items %d free %u generation %llu owner ",
(unsigned long long)eb->start,
btrfs_header_level(eb), nr,
(u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr,
(unsigned long long)btrfs_header_generation(eb));
print_objectid(stdout, btrfs_header_owner(eb), 0);
printf("\n");
print_uuids(eb);
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fflush(stdout);
for (i = 0; i < nr; 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 (%llu) gen %llu\n",
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(unsigned long long)blocknr,
(unsigned long long)blocknr / fs_info->nodesize,
(unsigned long long)btrfs_node_ptr_generation(eb, i));
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fflush(stdout);
}
if (!follow)
return;
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for (i = 0; i < nr; i++) {
next = read_tree_block(fs_info,
btrfs_node_blockptr(eb, i),
btrfs_node_ptr_generation(eb, i));
if (!extent_buffer_uptodate(next)) {
fprintf(stderr, "failed to read %llu in tree %llu\n",
(unsigned long long)btrfs_node_blockptr(eb, i),
(unsigned long long)btrfs_header_owner(eb));
continue;
}
if (btrfs_header_level(next) != btrfs_header_level(eb) - 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(eb), i,
btrfs_header_level(eb),
btrfs_header_bytenr(next),
btrfs_header_level(next),
btrfs_header_level(eb) - 1);
free_extent_buffer(next);
continue;
}
btrfs_print_tree(next, 1);
free_extent_buffer(next);
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}
return;
free_extent_buffer(next);
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}