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bcachefs-tools/libbcachefs.c
Kent Overstreet b867ddadb3 print out sequence number in show-super
2020-07-08 15:58:35 -04:00

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#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <uuid/uuid.h>
#include "libbcachefs.h"
#include "crypto.h"
#include "libbcachefs/bcachefs_format.h"
#include "libbcachefs/btree_cache.h"
#include "libbcachefs/checksum.h"
#include "libbcachefs/disk_groups.h"
#include "libbcachefs/opts.h"
#include "libbcachefs/replicas.h"
#include "libbcachefs/super-io.h"
#include "tools-util.h"
#define NSEC_PER_SEC 1000000000L
/* minimum size filesystem we can create, given a bucket size: */
static u64 min_size(unsigned bucket_size)
{
return BCH_MIN_NR_NBUCKETS * bucket_size;
}
static void init_layout(struct bch_sb_layout *l, unsigned block_size,
u64 start, u64 end)
{
unsigned sb_size;
u64 backup; /* offset of 2nd sb */
memset(l, 0, sizeof(*l));
if (start != BCH_SB_SECTOR)
start = round_up(start, block_size);
end = round_down(end, block_size);
if (start >= end)
die("insufficient space for superblocks");
/*
* Create two superblocks in the allowed range: reserve a maximum of 64k
*/
sb_size = min_t(u64, 128, end - start / 2);
backup = start + sb_size;
backup = round_up(backup, block_size);
backup = min(backup, end);
sb_size = min(end - backup, backup- start);
sb_size = rounddown_pow_of_two(sb_size);
if (sb_size < 8)
die("insufficient space for superblocks");
l->magic = BCACHE_MAGIC;
l->layout_type = 0;
l->nr_superblocks = 2;
l->sb_max_size_bits = ilog2(sb_size);
l->sb_offset[0] = cpu_to_le64(start);
l->sb_offset[1] = cpu_to_le64(backup);
}
void bch2_pick_bucket_size(struct bch_opts opts, struct dev_opts *dev)
{
if (!dev->sb_offset) {
dev->sb_offset = BCH_SB_SECTOR;
dev->sb_end = BCH_SB_SECTOR + 256;
}
if (!dev->size)
dev->size = get_size(dev->path, dev->fd) >> 9;
if (!dev->bucket_size) {
if (dev->size < min_size(opts.block_size))
die("cannot format %s, too small (%llu sectors, min %llu)",
dev->path, dev->size, min_size(opts.block_size));
/* Bucket size must be >= block size: */
dev->bucket_size = opts.block_size;
/* Bucket size must be >= btree node size: */
if (opt_defined(opts, btree_node_size))
dev->bucket_size = max_t(unsigned, dev->bucket_size,
opts.btree_node_size);
/* Want a bucket size of at least 128k, if possible: */
dev->bucket_size = max(dev->bucket_size, 256U);
if (dev->size >= min_size(dev->bucket_size)) {
unsigned scale = max(1,
ilog2(dev->size / min_size(dev->bucket_size)) / 4);
scale = rounddown_pow_of_two(scale);
/* max bucket size 1 mb */
dev->bucket_size = min(dev->bucket_size * scale, 1U << 11);
} else {
do {
dev->bucket_size /= 2;
} while (dev->size < min_size(dev->bucket_size));
}
}
dev->nbuckets = dev->size / dev->bucket_size;
if (dev->bucket_size < opts.block_size)
die("Bucket size cannot be smaller than block size");
if (opt_defined(opts, btree_node_size) &&
dev->bucket_size < opts.btree_node_size)
die("Bucket size cannot be smaller than btree node size");
if (dev->nbuckets < BCH_MIN_NR_NBUCKETS)
die("Not enough buckets: %llu, need %u (bucket size %u)",
dev->nbuckets, BCH_MIN_NR_NBUCKETS, dev->bucket_size);
}
static unsigned parse_target(struct bch_sb_handle *sb,
struct dev_opts *devs, size_t nr_devs,
const char *s)
{
struct dev_opts *i;
int idx;
if (!s)
return 0;
for (i = devs; i < devs + nr_devs; i++)
if (!strcmp(s, i->path))
return dev_to_target(i - devs);
idx = bch2_disk_path_find(sb, s);
if (idx >= 0)
return group_to_target(idx);
die("Invalid target %s", s);
return 0;
}
struct bch_sb *bch2_format(struct bch_opt_strs fs_opt_strs,
struct bch_opts fs_opts,
struct format_opts opts,
struct dev_opts *devs,
size_t nr_devs)
{
struct bch_sb_handle sb = { NULL };
struct dev_opts *i;
struct bch_sb_field_members *mi;
unsigned max_dev_block_size = 0;
unsigned opt_id;
for (i = devs; i < devs + nr_devs; i++)
max_dev_block_size = max(max_dev_block_size,
get_blocksize(i->path, i->fd));
/* calculate block size: */
if (!opt_defined(fs_opts, block_size)) {
opt_set(fs_opts, block_size, max_dev_block_size);
} else if (fs_opts.block_size < max_dev_block_size)
die("blocksize too small: %u, must be greater than device blocksize %u",
fs_opts.block_size, max_dev_block_size);
/* calculate bucket sizes: */
for (i = devs; i < devs + nr_devs; i++)
bch2_pick_bucket_size(fs_opts, i);
/* calculate btree node size: */
if (!opt_defined(fs_opts, btree_node_size)) {
/* 256k default btree node size */
opt_set(fs_opts, btree_node_size, 512);
for (i = devs; i < devs + nr_devs; i++)
fs_opts.btree_node_size =
min_t(unsigned, fs_opts.btree_node_size,
i->bucket_size);
}
if (!is_power_of_2(fs_opts.block_size))
die("block size must be power of 2");
if (!is_power_of_2(fs_opts.btree_node_size))
die("btree node size must be power of 2");
if (uuid_is_null(opts.uuid.b))
uuid_generate(opts.uuid.b);
if (bch2_sb_realloc(&sb, 0))
die("insufficient memory");
sb.sb->version = le16_to_cpu(bcachefs_metadata_version_current);
sb.sb->version_min = le16_to_cpu(bcachefs_metadata_version_current);
sb.sb->magic = BCACHE_MAGIC;
sb.sb->block_size = cpu_to_le16(fs_opts.block_size);
sb.sb->user_uuid = opts.uuid;
sb.sb->nr_devices = nr_devs;
uuid_generate(sb.sb->uuid.b);
if (opts.label)
memcpy(sb.sb->label,
opts.label,
min(strlen(opts.label), sizeof(sb.sb->label)));
for (opt_id = 0;
opt_id < bch2_opts_nr;
opt_id++) {
const struct bch_option *opt = &bch2_opt_table[opt_id];
u64 v;
if (opt->set_sb == SET_NO_SB_OPT)
continue;
v = bch2_opt_defined_by_id(&fs_opts, opt_id)
? bch2_opt_get_by_id(&fs_opts, opt_id)
: bch2_opt_get_by_id(&bch2_opts_default, opt_id);
opt->set_sb(sb.sb, v);
}
SET_BCH_SB_ENCODED_EXTENT_MAX_BITS(sb.sb,
ilog2(opts.encoded_extent_max));
struct timespec now;
if (clock_gettime(CLOCK_REALTIME, &now))
die("error getting current time: %m");
sb.sb->time_base_lo = cpu_to_le64(now.tv_sec * NSEC_PER_SEC + now.tv_nsec);
sb.sb->time_precision = cpu_to_le32(1);
/* Member info: */
mi = bch2_sb_resize_members(&sb,
(sizeof(*mi) + sizeof(struct bch_member) *
nr_devs) / sizeof(u64));
for (i = devs; i < devs + nr_devs; i++) {
struct bch_member *m = mi->members + (i - devs);
uuid_generate(m->uuid.b);
m->nbuckets = cpu_to_le64(i->nbuckets);
m->first_bucket = 0;
m->bucket_size = cpu_to_le16(i->bucket_size);
SET_BCH_MEMBER_REPLACEMENT(m, CACHE_REPLACEMENT_LRU);
SET_BCH_MEMBER_DISCARD(m, i->discard);
SET_BCH_MEMBER_DATA_ALLOWED(m, i->data_allowed);
SET_BCH_MEMBER_DURABILITY(m, i->durability + 1);
}
/* Disk groups */
for (i = devs; i < devs + nr_devs; i++) {
struct bch_member *m = mi->members + (i - devs);
int idx;
if (!i->group)
continue;
idx = bch2_disk_path_find_or_create(&sb, i->group);
if (idx < 0)
die("error creating disk path: %s", idx);
SET_BCH_MEMBER_GROUP(m, idx + 1);
}
SET_BCH_SB_FOREGROUND_TARGET(sb.sb,
parse_target(&sb, devs, nr_devs, fs_opt_strs.foreground_target));
SET_BCH_SB_BACKGROUND_TARGET(sb.sb,
parse_target(&sb, devs, nr_devs, fs_opt_strs.background_target));
SET_BCH_SB_PROMOTE_TARGET(sb.sb,
parse_target(&sb, devs, nr_devs, fs_opt_strs.promote_target));
/* Crypt: */
if (opts.encrypted) {
struct bch_sb_field_crypt *crypt =
bch2_sb_resize_crypt(&sb, sizeof(*crypt) / sizeof(u64));
bch_sb_crypt_init(sb.sb, crypt, opts.passphrase);
SET_BCH_SB_ENCRYPTION_TYPE(sb.sb, 1);
}
for (i = devs; i < devs + nr_devs; i++) {
sb.sb->dev_idx = i - devs;
init_layout(&sb.sb->layout, fs_opts.block_size,
i->sb_offset, i->sb_end);
if (i->sb_offset == BCH_SB_SECTOR) {
/* Zero start of disk */
static const char zeroes[BCH_SB_SECTOR << 9];
xpwrite(i->fd, zeroes, BCH_SB_SECTOR << 9, 0);
}
bch2_super_write(i->fd, sb.sb);
close(i->fd);
}
return sb.sb;
}
void bch2_super_write(int fd, struct bch_sb *sb)
{
struct nonce nonce = { 0 };
unsigned i;
for (i = 0; i < sb->layout.nr_superblocks; i++) {
sb->offset = sb->layout.sb_offset[i];
if (sb->offset == BCH_SB_SECTOR) {
/* Write backup layout */
xpwrite(fd, &sb->layout, sizeof(sb->layout),
BCH_SB_LAYOUT_SECTOR << 9);
}
sb->csum = csum_vstruct(NULL, BCH_SB_CSUM_TYPE(sb), nonce, sb);
xpwrite(fd, sb, vstruct_bytes(sb),
le64_to_cpu(sb->offset) << 9);
}
fsync(fd);
}
struct bch_sb *__bch2_super_read(int fd, u64 sector)
{
struct bch_sb sb, *ret;
xpread(fd, &sb, sizeof(sb), sector << 9);
if (memcmp(&sb.magic, &BCACHE_MAGIC, sizeof(sb.magic)))
die("not a bcachefs superblock");
size_t bytes = vstruct_bytes(&sb);
ret = malloc(bytes);
xpread(fd, ret, bytes, sector << 9);
return ret;
}
static unsigned get_dev_has_data(struct bch_sb *sb, unsigned dev)
{
struct bch_sb_field_replicas *replicas;
struct bch_replicas_entry *r;
unsigned i, data_has = 0;
replicas = bch2_sb_get_replicas(sb);
if (replicas)
for_each_replicas_entry(replicas, r)
for (i = 0; i < r->nr_devs; i++)
if (r->devs[i] == dev)
data_has |= 1 << r->data_type;
return data_has;
}
static int bch2_sb_get_target(struct bch_sb *sb, char *buf, size_t len, u64 v)
{
struct target t = target_decode(v);
int ret;
switch (t.type) {
case TARGET_NULL:
return scnprintf(buf, len, "none");
case TARGET_DEV: {
struct bch_sb_field_members *mi = bch2_sb_get_members(sb);
struct bch_member *m = mi->members + t.dev;
if (bch2_dev_exists(sb, mi, t.dev)) {
char uuid_str[40];
uuid_unparse(m->uuid.b, uuid_str);
ret = scnprintf(buf, len, "Device %u (%s)", t.dev,
uuid_str);
} else {
ret = scnprintf(buf, len, "Bad device %u", t.dev);
}
break;
}
case TARGET_GROUP: {
struct bch_sb_field_disk_groups *gi;
gi = bch2_sb_get_disk_groups(sb);
struct bch_disk_group *g = gi->entries + t.group;
if (t.group < disk_groups_nr(gi) && !BCH_GROUP_DELETED(g)) {
ret = scnprintf(buf, len, "Group %u (%.*s)", t.group,
BCH_SB_LABEL_SIZE, g->label);
} else {
ret = scnprintf(buf, len, "Bad group %u", t.group);
}
break;
}
default:
BUG();
}
return ret;
}
/* superblock printing: */
static void bch2_sb_print_layout(struct bch_sb *sb, enum units units)
{
struct bch_sb_layout *l = &sb->layout;
unsigned i;
printf(" type: %u\n"
" superblock max size: %s\n"
" nr superblocks: %u\n"
" Offsets: ",
l->layout_type,
pr_units(1 << l->sb_max_size_bits, units),
l->nr_superblocks);
for (i = 0; i < l->nr_superblocks; i++) {
if (i)
printf(", ");
printf("%llu", le64_to_cpu(l->sb_offset[i]));
}
putchar('\n');
}
static void bch2_sb_print_journal(struct bch_sb *sb, struct bch_sb_field *f,
enum units units)
{
struct bch_sb_field_journal *journal = field_to_type(f, journal);
unsigned i, nr = bch2_nr_journal_buckets(journal);
printf(" Buckets: ");
for (i = 0; i < nr; i++) {
if (i)
putchar(' ');
printf("%llu", le64_to_cpu(journal->buckets[i]));
}
putchar('\n');
}
static void bch2_sb_print_members(struct bch_sb *sb, struct bch_sb_field *f,
enum units units)
{
struct bch_sb_field_members *mi = field_to_type(f, members);
struct bch_sb_field_disk_groups *gi = bch2_sb_get_disk_groups(sb);
unsigned i;
for (i = 0; i < sb->nr_devices; i++) {
struct bch_member *m = mi->members + i;
time_t last_mount = le64_to_cpu(m->last_mount);
char member_uuid_str[40];
char data_allowed_str[100];
char data_has_str[100];
char group[BCH_SB_LABEL_SIZE+10];
char time_str[64];
if (!bch2_member_exists(m))
continue;
uuid_unparse(m->uuid.b, member_uuid_str);
if (BCH_MEMBER_GROUP(m)) {
unsigned idx = BCH_MEMBER_GROUP(m) - 1;
if (idx < disk_groups_nr(gi)) {
snprintf(group, sizeof(group), "%.*s (%u)",
BCH_SB_LABEL_SIZE,
gi->entries[idx].label, idx);
} else {
strcpy(group, "(bad disk groups section)");
}
} else {
strcpy(group, "(none)");
}
bch2_flags_to_text(&PBUF(data_allowed_str),
bch2_data_types,
BCH_MEMBER_DATA_ALLOWED(m));
if (!data_allowed_str[0])
strcpy(data_allowed_str, "(none)");
bch2_flags_to_text(&PBUF(data_has_str),
bch2_data_types,
get_dev_has_data(sb, i));
if (!data_has_str[0])
strcpy(data_has_str, "(none)");
if (last_mount) {
struct tm *tm = localtime(&last_mount);
size_t err = strftime(time_str, sizeof(time_str), "%c", tm);
if (!err)
strcpy(time_str, "(formatting error)");
} else {
strcpy(time_str, "(never)");
}
printf(" Device %u:\n"
" UUID: %s\n"
" Size: %s\n"
" Bucket size: %s\n"
" First bucket: %u\n"
" Buckets: %llu\n"
" Last mount: %s\n"
" State: %s\n"
" Group: %s\n"
" Data allowed: %s\n"
" Has data: %s\n"
" Replacement policy: %s\n"
" Discard: %llu\n",
i, member_uuid_str,
pr_units(le16_to_cpu(m->bucket_size) *
le64_to_cpu(m->nbuckets), units),
pr_units(le16_to_cpu(m->bucket_size), units),
le16_to_cpu(m->first_bucket),
le64_to_cpu(m->nbuckets),
time_str,
BCH_MEMBER_STATE(m) < BCH_MEMBER_STATE_NR
? bch2_dev_state[BCH_MEMBER_STATE(m)]
: "unknown",
group,
data_allowed_str,
data_has_str,
BCH_MEMBER_REPLACEMENT(m) < CACHE_REPLACEMENT_NR
? bch2_cache_replacement_policies[BCH_MEMBER_REPLACEMENT(m)]
: "unknown",
BCH_MEMBER_DISCARD(m));
}
}
static void bch2_sb_print_crypt(struct bch_sb *sb, struct bch_sb_field *f,
enum units units)
{
struct bch_sb_field_crypt *crypt = field_to_type(f, crypt);
printf(" KFD: %llu\n"
" scrypt n: %llu\n"
" scrypt r: %llu\n"
" scrypt p: %llu\n",
BCH_CRYPT_KDF_TYPE(crypt),
BCH_KDF_SCRYPT_N(crypt),
BCH_KDF_SCRYPT_R(crypt),
BCH_KDF_SCRYPT_P(crypt));
}
static void bch2_sb_print_replicas_v0(struct bch_sb *sb, struct bch_sb_field *f,
enum units units)
{
struct bch_sb_field_replicas_v0 *replicas = field_to_type(f, replicas_v0);
struct bch_replicas_entry_v0 *e;
unsigned i;
for_each_replicas_entry(replicas, e) {
printf_pad(32, " %s:", bch2_data_types[e->data_type]);
putchar('[');
for (i = 0; i < e->nr_devs; i++) {
if (i)
putchar(' ');
printf("%u", e->devs[i]);
}
printf("]\n");
}
}
static void bch2_sb_print_replicas(struct bch_sb *sb, struct bch_sb_field *f,
enum units units)
{
struct bch_sb_field_replicas *replicas = field_to_type(f, replicas);
struct bch_replicas_entry *e;
unsigned i;
for_each_replicas_entry(replicas, e) {
printf_pad(32, " %s: %u/%u",
bch2_data_types[e->data_type],
e->nr_required,
e->nr_devs);
putchar('[');
for (i = 0; i < e->nr_devs; i++) {
if (i)
putchar(' ');
printf("%u", e->devs[i]);
}
printf("]\n");
}
}
static void bch2_sb_print_quota(struct bch_sb *sb, struct bch_sb_field *f,
enum units units)
{
}
static void bch2_sb_print_disk_groups(struct bch_sb *sb, struct bch_sb_field *f,
enum units units)
{
}
static void bch2_sb_print_clean(struct bch_sb *sb, struct bch_sb_field *f,
enum units units)
{
}
static void bch2_sb_print_journal_seq_blacklist(struct bch_sb *sb, struct bch_sb_field *f,
enum units units)
{
}
typedef void (*sb_field_print_fn)(struct bch_sb *, struct bch_sb_field *, enum units);
struct bch_sb_field_toolops {
sb_field_print_fn print;
};
static const struct bch_sb_field_toolops bch2_sb_field_ops[] = {
#define x(f, nr) \
[BCH_SB_FIELD_##f] = { \
.print = bch2_sb_print_##f, \
},
BCH_SB_FIELDS()
#undef x
};
static inline void bch2_sb_field_print(struct bch_sb *sb,
struct bch_sb_field *f,
enum units units)
{
unsigned type = le32_to_cpu(f->type);
if (type < BCH_SB_FIELD_NR)
bch2_sb_field_ops[type].print(sb, f, units);
else
printf("(unknown field %u)\n", type);
}
void bch2_sb_print(struct bch_sb *sb, bool print_layout,
unsigned fields, enum units units)
{
struct bch_sb_field_members *mi;
char user_uuid_str[40], internal_uuid_str[40];
char features_str[200];
char fields_have_str[200];
char label[BCH_SB_LABEL_SIZE + 1];
char time_str[64];
char foreground_str[64];
char background_str[64];
char promote_str[64];
struct bch_sb_field *f;
u64 fields_have = 0;
unsigned nr_devices = 0;
time_t time_base = le64_to_cpu(sb->time_base_lo) / NSEC_PER_SEC;
memcpy(label, sb->label, BCH_SB_LABEL_SIZE);
label[BCH_SB_LABEL_SIZE] = '\0';
uuid_unparse(sb->user_uuid.b, user_uuid_str);
uuid_unparse(sb->uuid.b, internal_uuid_str);
if (time_base) {
struct tm *tm = localtime(&time_base);
size_t err = strftime(time_str, sizeof(time_str), "%c", tm);
if (!err)
strcpy(time_str, "(formatting error)");
} else {
strcpy(time_str, "(not set)");
}
mi = bch2_sb_get_members(sb);
if (mi) {
struct bch_member *m;
for (m = mi->members;
m < mi->members + sb->nr_devices;
m++)
nr_devices += bch2_member_exists(m);
}
bch2_sb_get_target(sb, foreground_str, sizeof(foreground_str),
BCH_SB_FOREGROUND_TARGET(sb));
bch2_sb_get_target(sb, background_str, sizeof(background_str),
BCH_SB_BACKGROUND_TARGET(sb));
bch2_sb_get_target(sb, promote_str, sizeof(promote_str),
BCH_SB_PROMOTE_TARGET(sb));
bch2_flags_to_text(&PBUF(features_str),
bch2_sb_features,
le64_to_cpu(sb->features[0]));
vstruct_for_each(sb, f)
fields_have |= 1 << le32_to_cpu(f->type);
bch2_flags_to_text(&PBUF(fields_have_str),
bch2_sb_fields, fields_have);
printf("External UUID: %s\n"
"Internal UUID: %s\n"
"Label: %s\n"
"Version: %llu\n"
"Created: %s\n"
"Squence number: %llu\n"
"Block_size: %s\n"
"Btree node size: %s\n"
"Error action: %s\n"
"Clean: %llu\n"
"Features: %s\n"
"Metadata replicas: %llu\n"
"Data replicas: %llu\n"
"Metadata checksum type: %s (%llu)\n"
"Data checksum type: %s (%llu)\n"
"Compression type: %s (%llu)\n"
"Foreground write target: %s\n"
"Background write target: %s\n"
"Promote target: %s\n"
"String hash type: %s (%llu)\n"
"32 bit inodes: %llu\n"
"GC reserve percentage: %llu%%\n"
"Root reserve percentage: %llu%%\n"
"Devices: %u live, %u total\n"
"Sections: %s\n"
"Superblock size: %llu\n",
user_uuid_str,
internal_uuid_str,
label,
le64_to_cpu(sb->version),
time_str,
le64_to_cpu(sb->seq),
pr_units(le16_to_cpu(sb->block_size), units),
pr_units(BCH_SB_BTREE_NODE_SIZE(sb), units),
BCH_SB_ERROR_ACTION(sb) < BCH_NR_ERROR_ACTIONS
? bch2_error_actions[BCH_SB_ERROR_ACTION(sb)]
: "unknown",
BCH_SB_CLEAN(sb),
features_str,
BCH_SB_META_REPLICAS_WANT(sb),
BCH_SB_DATA_REPLICAS_WANT(sb),
BCH_SB_META_CSUM_TYPE(sb) < BCH_CSUM_OPT_NR
? bch2_csum_opts[BCH_SB_META_CSUM_TYPE(sb)]
: "unknown",
BCH_SB_META_CSUM_TYPE(sb),
BCH_SB_DATA_CSUM_TYPE(sb) < BCH_CSUM_OPT_NR
? bch2_csum_opts[BCH_SB_DATA_CSUM_TYPE(sb)]
: "unknown",
BCH_SB_DATA_CSUM_TYPE(sb),
BCH_SB_COMPRESSION_TYPE(sb) < BCH_COMPRESSION_OPT_NR
? bch2_compression_opts[BCH_SB_COMPRESSION_TYPE(sb)]
: "unknown",
BCH_SB_COMPRESSION_TYPE(sb),
foreground_str,
background_str,
promote_str,
BCH_SB_STR_HASH_TYPE(sb) < BCH_STR_HASH_NR
? bch2_str_hash_types[BCH_SB_STR_HASH_TYPE(sb)]
: "unknown",
BCH_SB_STR_HASH_TYPE(sb),
BCH_SB_INODE_32BIT(sb),
BCH_SB_GC_RESERVE(sb),
BCH_SB_ROOT_RESERVE(sb),
nr_devices, sb->nr_devices,
fields_have_str,
vstruct_bytes(sb));
if (print_layout) {
printf("\n"
"Layout:\n");
bch2_sb_print_layout(sb, units);
}
vstruct_for_each(sb, f) {
unsigned type = le32_to_cpu(f->type);
char name[60];
if (!(fields & (1 << type)))
continue;
if (type < BCH_SB_FIELD_NR) {
scnprintf(name, sizeof(name), "%s", bch2_sb_fields[type]);
name[0] = toupper(name[0]);
} else {
scnprintf(name, sizeof(name), "(unknown field %u)", type);
}
printf("\n%s (size %llu):\n", name, vstruct_bytes(f));
if (type < BCH_SB_FIELD_NR)
bch2_sb_field_print(sb, f, units);
}
}
/* ioctl interface: */
/* Global control device: */
int bcachectl_open(void)
{
return xopen("/dev/bcachefs-ctl", O_RDWR);
}
/* Filesystem handles (ioctl, sysfs dir): */
#define SYSFS_BASE "/sys/fs/bcachefs/"
void bcache_fs_close(struct bchfs_handle fs)
{
close(fs.ioctl_fd);
close(fs.sysfs_fd);
}
struct bchfs_handle bcache_fs_open(const char *path)
{
struct bchfs_handle ret;
if (!uuid_parse(path, ret.uuid.b)) {
/* It's a UUID, look it up in sysfs: */
char *sysfs = mprintf(SYSFS_BASE "%s", path);
ret.sysfs_fd = xopen(sysfs, O_RDONLY);
char *minor = read_file_str(ret.sysfs_fd, "minor");
char *ctl = mprintf("/dev/bcachefs%s-ctl", minor);
ret.ioctl_fd = xopen(ctl, O_RDWR);
free(sysfs);
free(minor);
free(ctl);
} else {
/* It's a path: */
ret.ioctl_fd = xopen(path, O_RDONLY);
struct bch_ioctl_query_uuid uuid;
if (ioctl(ret.ioctl_fd, BCH_IOCTL_QUERY_UUID, &uuid) < 0)
die("error opening %s: not a bcachefs filesystem", path);
ret.uuid = uuid.uuid;
char uuid_str[40];
uuid_unparse(uuid.uuid.b, uuid_str);
char *sysfs = mprintf(SYSFS_BASE "%s", uuid_str);
ret.sysfs_fd = xopen(sysfs, O_RDONLY);
free(sysfs);
}
return ret;
}
/*
* Given a path to a block device, open the filesystem it belongs to; also
* return the device's idx:
*/
struct bchfs_handle bchu_fs_open_by_dev(const char *path, unsigned *idx)
{
char buf[1024], *uuid_str;
struct stat stat = xstat(path);
if (!S_ISBLK(stat.st_mode))
die("%s is not a block device", path);
char *sysfs = mprintf("/sys/dev/block/%u:%u/bcachefs",
major(stat.st_dev),
minor(stat.st_dev));
ssize_t len = readlink(sysfs, buf, sizeof(buf));
free(sysfs);
if (len > 0) {
char *p = strrchr(buf, '/');
if (!p || sscanf(p + 1, "dev-%u", idx) != 1)
die("error parsing sysfs");
*p = '\0';
p = strrchr(buf, '/');
uuid_str = p + 1;
} else {
struct bch_opts opts = bch2_opts_empty();
opt_set(opts, noexcl, true);
opt_set(opts, nochanges, true);
struct bch_sb_handle sb;
int ret = bch2_read_super(path, &opts, &sb);
if (ret)
die("Error opening %s: %s", path, strerror(-ret));
*idx = sb.sb->dev_idx;
uuid_str = buf;
uuid_unparse(sb.sb->user_uuid.b, uuid_str);
bch2_free_super(&sb);
}
return bcache_fs_open(uuid_str);
}
int bchu_data(struct bchfs_handle fs, struct bch_ioctl_data cmd)
{
int progress_fd = xioctl(fs.ioctl_fd, BCH_IOCTL_DATA, &cmd);
while (1) {
struct bch_ioctl_data_event e;
if (read(progress_fd, &e, sizeof(e)) != sizeof(e))
die("error reading from progress fd %m");
if (e.type)
continue;
if (e.p.data_type == U8_MAX)
break;
printf("\33[2K\r");
printf("%llu%% complete: current position %s",
e.p.sectors_total
? e.p.sectors_done * 100 / e.p.sectors_total
: 0,
bch2_data_types[e.p.data_type]);
switch (e.p.data_type) {
case BCH_DATA_BTREE:
case BCH_DATA_USER:
printf(" %s:%llu:%llu",
bch2_btree_ids[e.p.btree_id],
e.p.pos.inode,
e.p.pos.offset);
}
fflush(stdout);
sleep(1);
}
printf("\nDone\n");
close(progress_fd);
return 0;
}
/* option parsing */
struct bch_opt_strs bch2_cmdline_opts_get(int *argc, char *argv[],
unsigned opt_types)
{
struct bch_opt_strs opts;
unsigned i = 1;
memset(&opts, 0, sizeof(opts));
while (i < *argc) {
char *optstr = strcmp_prefix(argv[i], "--");
char *valstr = NULL, *p;
int optid, nr_args = 1;
if (!optstr) {
i++;
continue;
}
optstr = strdup(optstr);
p = optstr;
while (isalpha(*p) || *p == '_')
p++;
if (*p == '=') {
*p = '\0';
valstr = p + 1;
}
optid = bch2_opt_lookup(optstr);
if (optid < 0 ||
!(bch2_opt_table[optid].mode & opt_types)) {
free(optstr);
i++;
continue;
}
if (!valstr &&
bch2_opt_table[optid].type != BCH_OPT_BOOL) {
nr_args = 2;
valstr = argv[i + 1];
}
if (!valstr)
valstr = "1";
opts.by_id[optid] = valstr;
*argc -= nr_args;
memmove(&argv[i],
&argv[i + nr_args],
sizeof(char *) * (*argc - i));
argv[*argc] = NULL;
}
return opts;
}
struct bch_opts bch2_parse_opts(struct bch_opt_strs strs)
{
struct bch_opts opts = bch2_opts_empty();
unsigned i;
int ret;
u64 v;
for (i = 0; i < bch2_opts_nr; i++) {
if (!strs.by_id[i] ||
bch2_opt_table[i].type == BCH_OPT_FN)
continue;
ret = bch2_opt_parse(NULL, &bch2_opt_table[i],
strs.by_id[i], &v);
if (ret < 0)
die("Invalid %s: %s", strs.by_id[i], strerror(-ret));
bch2_opt_set_by_id(&opts, i, v);
}
return opts;
}
void bch2_opts_usage(unsigned opt_types)
{
const struct bch_option *opt;
unsigned i, c = 0, helpcol = 30;
void tabalign() {
while (c < helpcol) {
putchar(' ');
c++;
}
}
void newline() {
printf("\n");
c = 0;
}
for (opt = bch2_opt_table;
opt < bch2_opt_table + bch2_opts_nr;
opt++) {
if (!(opt->mode & opt_types))
continue;
c += printf(" --%s", opt->attr.name);
switch (opt->type) {
case BCH_OPT_BOOL:
break;
case BCH_OPT_STR:
c += printf("=(");
for (i = 0; opt->choices[i]; i++) {
if (i)
c += printf("|");
c += printf("%s", opt->choices[i]);
}
c += printf(")");
break;
default:
c += printf("=%s", opt->hint);
break;
}
if (opt->help) {
const char *l = opt->help;
if (c >= helpcol)
newline();
while (1) {
const char *n = strchrnul(l, '\n');
tabalign();
printf("%.*s", (int) (n - l), l);
newline();
if (!*n)
break;
l = n + 1;
}
} else {
newline();
}
}
}
dev_names bchu_fs_get_devices(struct bchfs_handle fs)
{
DIR *dir = fdopendir(fs.sysfs_fd);
struct dirent *d;
dev_names devs;
darray_init(devs);
while ((errno = 0), (d = readdir(dir))) {
struct dev_name n = { 0, NULL, NULL };
if (sscanf(d->d_name, "dev-%u", &n.idx) != 1)
continue;
char *block_attr = mprintf("dev-%u/block", n.idx);
char sysfs_block_buf[4096];
ssize_t r = readlinkat(fs.sysfs_fd, block_attr,
sysfs_block_buf, sizeof(sysfs_block_buf));
if (r > 0) {
sysfs_block_buf[r] = '\0';
n.dev = strdup(basename(sysfs_block_buf));
}
free(block_attr);
char *label_attr = mprintf("dev-%u/label", n.idx);
n.label = read_file_str(fs.sysfs_fd, label_attr);
free(label_attr);
darray_append(devs, n);
}
closedir(dir);
return devs;
}
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