// SPDX-License-Identifier: GPL-2.0
#include "bcachefs.h"
#include "backpointers.h"
#include "bkey_methods.h"
#include "btree_cache.h"
#include "btree_types.h"
#include "alloc_background.h"
#include "dirent.h"
#include "disk_accounting.h"
#include "ec.h"
#include "error.h"
#include "extents.h"
#include "inode.h"
#include "io_misc.h"
#include "lru.h"
#include "quota.h"
#include "reflink.h"
#include "snapshot.h"
#include "subvolume.h"
#include "xattr.h"
const char * const bch2_bkey_types[] = {
#define x(name, nr) #name,
BCH_BKEY_TYPES()
#undef x
NULL
};
static int deleted_key_validate(struct bch_fs *c, struct bkey_s_c k,
enum bch_validate_flags flags)
{
return 0;
}
#define bch2_bkey_ops_deleted ((struct bkey_ops) { \
.key_validate = deleted_key_validate, \
})
#define bch2_bkey_ops_whiteout ((struct bkey_ops) { \
.key_validate = deleted_key_validate, \
})
static int empty_val_key_validate(struct bch_fs *c, struct bkey_s_c k,
enum bch_validate_flags flags)
{
int ret = 0;
bkey_fsck_err_on(bkey_val_bytes(k.k),
c, bkey_val_size_nonzero,
"incorrect value size (%zu != 0)",
bkey_val_bytes(k.k));
fsck_err:
return ret;
}
#define bch2_bkey_ops_error ((struct bkey_ops) { \
.key_validate = empty_val_key_validate, \
})
static int key_type_cookie_validate(struct bch_fs *c, struct bkey_s_c k,
enum bch_validate_flags flags)
{
return 0;
}
static void key_type_cookie_to_text(struct printbuf *out, struct bch_fs *c,
struct bkey_s_c k)
{
struct bkey_s_c_cookie ck = bkey_s_c_to_cookie(k);
prt_printf(out, "%llu", le64_to_cpu(ck.v->cookie));
}
#define bch2_bkey_ops_cookie ((struct bkey_ops) { \
.key_validate = key_type_cookie_validate, \
.val_to_text = key_type_cookie_to_text, \
.min_val_size = 8, \
})
#define bch2_bkey_ops_hash_whiteout ((struct bkey_ops) {\
.key_validate = empty_val_key_validate, \
})
static int key_type_inline_data_validate(struct bch_fs *c, struct bkey_s_c k,
enum bch_validate_flags flags)
{
return 0;
}
static void key_type_inline_data_to_text(struct printbuf *out, struct bch_fs *c,
struct bkey_s_c k)
{
struct bkey_s_c_inline_data d = bkey_s_c_to_inline_data(k);
unsigned datalen = bkey_inline_data_bytes(k.k);
prt_printf(out, "datalen %u: %*phN",
datalen, min(datalen, 32U), d.v->data);
}
#define bch2_bkey_ops_inline_data ((struct bkey_ops) { \
.key_validate = key_type_inline_data_validate, \
.val_to_text = key_type_inline_data_to_text, \
})
static bool key_type_set_merge(struct bch_fs *c, struct bkey_s l, struct bkey_s_c r)
{
bch2_key_resize(l.k, l.k->size + r.k->size);
return true;
}
#define bch2_bkey_ops_set ((struct bkey_ops) { \
.key_validate = empty_val_key_validate, \
.key_merge = key_type_set_merge, \
})
const struct bkey_ops bch2_bkey_ops[] = {
#define x(name, nr) [KEY_TYPE_##name] = bch2_bkey_ops_##name,
BCH_BKEY_TYPES()
#undef x
};
const struct bkey_ops bch2_bkey_null_ops = {
};
int bch2_bkey_val_validate(struct bch_fs *c, struct bkey_s_c k,
enum bch_validate_flags flags)
{
if (test_bit(BCH_FS_no_invalid_checks, &c->flags))
return 0;
const struct bkey_ops *ops = bch2_bkey_type_ops(k.k->type);
int ret = 0;
bkey_fsck_err_on(bkey_val_bytes(k.k) < ops->min_val_size,
c, bkey_val_size_too_small,
"bad val size (%zu < %u)",
bkey_val_bytes(k.k), ops->min_val_size);
if (!ops->key_validate)
return 0;
ret = ops->key_validate(c, k, flags);
fsck_err:
return ret;
}
static u64 bch2_key_types_allowed[] = {
[BKEY_TYPE_btree] =
BIT_ULL(KEY_TYPE_deleted)|
BIT_ULL(KEY_TYPE_btree_ptr)|
BIT_ULL(KEY_TYPE_btree_ptr_v2),
#define x(name, nr, flags, keys) [BKEY_TYPE_##name] = BIT_ULL(KEY_TYPE_deleted)|keys,
BCH_BTREE_IDS()
#undef x
};
const char *bch2_btree_node_type_str(enum btree_node_type type)
{
return type == BKEY_TYPE_btree ? "internal btree node" : bch2_btree_id_str(type - 1);
}
int __bch2_bkey_validate(struct bch_fs *c, struct bkey_s_c k,
enum btree_node_type type,
enum bch_validate_flags flags)
{
if (test_bit(BCH_FS_no_invalid_checks, &c->flags))
return 0;
int ret = 0;
bkey_fsck_err_on(k.k->u64s < BKEY_U64s,
c, bkey_u64s_too_small,
"u64s too small (%u < %zu)", k.k->u64s, BKEY_U64s);
if (type >= BKEY_TYPE_NR)
return 0;
bkey_fsck_err_on(k.k->type < KEY_TYPE_MAX &&
(type == BKEY_TYPE_btree || (flags & BCH_VALIDATE_commit)) &&
!(bch2_key_types_allowed[type] & BIT_ULL(k.k->type)),
c, bkey_invalid_type_for_btree,
"invalid key type for btree %s (%s)",
bch2_btree_node_type_str(type),
k.k->type < KEY_TYPE_MAX
? bch2_bkey_types[k.k->type]
: "(unknown)");
if (btree_node_type_is_extents(type) && !bkey_whiteout(k.k)) {
bkey_fsck_err_on(k.k->size == 0,
c, bkey_extent_size_zero,
"size == 0");
bkey_fsck_err_on(k.k->size > k.k->p.offset,
c, bkey_extent_size_greater_than_offset,
"size greater than offset (%u > %llu)",
k.k->size, k.k->p.offset);
} else {
bkey_fsck_err_on(k.k->size,
c, bkey_size_nonzero,
"size != 0");
}
if (type != BKEY_TYPE_btree) {
enum btree_id btree = type - 1;
if (btree_type_has_snapshots(btree)) {
bkey_fsck_err_on(!k.k->p.snapshot,
c, bkey_snapshot_zero,
"snapshot == 0");
} else if (!btree_type_has_snapshot_field(btree)) {
bkey_fsck_err_on(k.k->p.snapshot,
c, bkey_snapshot_nonzero,
"nonzero snapshot");
} else {
/*
* btree uses snapshot field but it's not required to be
* nonzero
*/
}
bkey_fsck_err_on(bkey_eq(k.k->p, POS_MAX),
c, bkey_at_pos_max,
"key at POS_MAX");
}
fsck_err:
return ret;
}
int bch2_bkey_validate(struct bch_fs *c, struct bkey_s_c k,
enum btree_node_type type,
enum bch_validate_flags flags)
{
return __bch2_bkey_validate(c, k, type, flags) ?:
bch2_bkey_val_validate(c, k, flags);
}
int bch2_bkey_in_btree_node(struct bch_fs *c, struct btree *b,
struct bkey_s_c k, enum bch_validate_flags flags)
{
int ret = 0;
bkey_fsck_err_on(bpos_lt(k.k->p, b->data->min_key),
c, bkey_before_start_of_btree_node,
"key before start of btree node");
bkey_fsck_err_on(bpos_gt(k.k->p, b->data->max_key),
c, bkey_after_end_of_btree_node,
"key past end of btree node");
fsck_err:
return ret;
}
void bch2_bpos_to_text(struct printbuf *out, struct bpos pos)
{
if (bpos_eq(pos, POS_MIN))
prt_printf(out, "POS_MIN");
else if (bpos_eq(pos, POS_MAX))
prt_printf(out, "POS_MAX");
else if (bpos_eq(pos, SPOS_MAX))
prt_printf(out, "SPOS_MAX");
else {
if (pos.inode == U64_MAX)
prt_printf(out, "U64_MAX");
else
prt_printf(out, "%llu", pos.inode);
prt_printf(out, ":");
if (pos.offset == U64_MAX)
prt_printf(out, "U64_MAX");
else
prt_printf(out, "%llu", pos.offset);
prt_printf(out, ":");
if (pos.snapshot == U32_MAX)
prt_printf(out, "U32_MAX");
else
prt_printf(out, "%u", pos.snapshot);
}
}
void bch2_bkey_to_text(struct printbuf *out, const struct bkey *k)
{
if (k) {
prt_printf(out, "u64s %u type ", k->u64s);
if (k->type < KEY_TYPE_MAX)
prt_printf(out, "%s ", bch2_bkey_types[k->type]);
else
prt_printf(out, "%u ", k->type);
bch2_bpos_to_text(out, k->p);
prt_printf(out, " len %u ver %llu", k->size, k->bversion.lo);
} else {
prt_printf(out, "(null)");
}
}
void bch2_val_to_text(struct printbuf *out, struct bch_fs *c,
struct bkey_s_c k)
{
const struct bkey_ops *ops = bch2_bkey_type_ops(k.k->type);
if (likely(ops->val_to_text))
ops->val_to_text(out, c, k);
}
void bch2_bkey_val_to_text(struct printbuf *out, struct bch_fs *c,
struct bkey_s_c k)
{
bch2_bkey_to_text(out, k.k);
if (bkey_val_bytes(k.k)) {
prt_printf(out, ": ");
bch2_val_to_text(out, c, k);
}
}
void bch2_bkey_swab_val(struct bkey_s k)
{
const struct bkey_ops *ops = bch2_bkey_type_ops(k.k->type);
if (ops->swab)
ops->swab(k);
}
bool bch2_bkey_normalize(struct bch_fs *c, struct bkey_s k)
{
const struct bkey_ops *ops = bch2_bkey_type_ops(k.k->type);
return ops->key_normalize
? ops->key_normalize(c, k)
: false;
}
bool bch2_bkey_merge(struct bch_fs *c, struct bkey_s l, struct bkey_s_c r)
{
const struct bkey_ops *ops = bch2_bkey_type_ops(l.k->type);
return ops->key_merge &&
bch2_bkey_maybe_mergable(l.k, r.k) &&
(u64) l.k->size + r.k->size <= KEY_SIZE_MAX &&
!bch2_key_merging_disabled &&
ops->key_merge(c, l, r);
}
static const struct old_bkey_type {
u8 btree_node_type;
u8 old;
u8 new;
} bkey_renumber_table[] = {
{BKEY_TYPE_btree, 128, KEY_TYPE_btree_ptr },
{BKEY_TYPE_extents, 128, KEY_TYPE_extent },
{BKEY_TYPE_extents, 129, KEY_TYPE_extent },
{BKEY_TYPE_extents, 130, KEY_TYPE_reservation },
{BKEY_TYPE_inodes, 128, KEY_TYPE_inode },
{BKEY_TYPE_inodes, 130, KEY_TYPE_inode_generation },
{BKEY_TYPE_dirents, 128, KEY_TYPE_dirent },
{BKEY_TYPE_dirents, 129, KEY_TYPE_hash_whiteout },
{BKEY_TYPE_xattrs, 128, KEY_TYPE_xattr },
{BKEY_TYPE_xattrs, 129, KEY_TYPE_hash_whiteout },
{BKEY_TYPE_alloc, 128, KEY_TYPE_alloc },
{BKEY_TYPE_quotas, 128, KEY_TYPE_quota },
};
void bch2_bkey_renumber(enum btree_node_type btree_node_type,
struct bkey_packed *k,
int write)
{
const struct old_bkey_type *i;
for (i = bkey_renumber_table;
i < bkey_renumber_table + ARRAY_SIZE(bkey_renumber_table);
i++)
if (btree_node_type == i->btree_node_type &&
k->type == (write ? i->new : i->old)) {
k->type = write ? i->old : i->new;
break;
}
}
void __bch2_bkey_compat(unsigned level, enum btree_id btree_id,
unsigned version, unsigned big_endian,
int write,
struct bkey_format *f,
struct bkey_packed *k)
{
const struct bkey_ops *ops;
struct bkey uk;
unsigned nr_compat = 5;
int i;
/*
* Do these operations in reverse order in the write path:
*/
for (i = 0; i < nr_compat; i++)
switch (!write ? i : nr_compat - 1 - i) {
case 0:
if (big_endian != CPU_BIG_ENDIAN) {
bch2_bkey_swab_key(f, k);
} else if (IS_ENABLED(CONFIG_BCACHEFS_DEBUG)) {
bch2_bkey_swab_key(f, k);
bch2_bkey_swab_key(f, k);
}
break;
case 1:
if (version < bcachefs_metadata_version_bkey_renumber)
bch2_bkey_renumber(__btree_node_type(level, btree_id), k, write);
break;
case 2:
if (version < bcachefs_metadata_version_inode_btree_change &&
btree_id == BTREE_ID_inodes) {
if (!bkey_packed(k)) {
struct bkey_i *u = packed_to_bkey(k);
swap(u->k.p.inode, u->k.p.offset);
} else if (f->bits_per_field[BKEY_FIELD_INODE] &&
f->bits_per_field[BKEY_FIELD_OFFSET]) {
struct bkey_format tmp = *f, *in = f, *out = &tmp;
swap(tmp.bits_per_field[BKEY_FIELD_INODE],
tmp.bits_per_field[BKEY_FIELD_OFFSET]);
swap(tmp.field_offset[BKEY_FIELD_INODE],
tmp.field_offset[BKEY_FIELD_OFFSET]);
if (!write)
swap(in, out);
uk = __bch2_bkey_unpack_key(in, k);
swap(uk.p.inode, uk.p.offset);
BUG_ON(!bch2_bkey_pack_key(k, &uk, out));
}
}
break;
case 3:
if (version < bcachefs_metadata_version_snapshot &&
(level || btree_type_has_snapshots(btree_id))) {
struct bkey_i *u = packed_to_bkey(k);
if (u) {
u->k.p.snapshot = write
? 0 : U32_MAX;
} else {
u64 min_packed = le64_to_cpu(f->field_offset[BKEY_FIELD_SNAPSHOT]);
u64 max_packed = min_packed +
~(~0ULL << f->bits_per_field[BKEY_FIELD_SNAPSHOT]);
uk = __bch2_bkey_unpack_key(f, k);
uk.p.snapshot = write
? min_packed : min_t(u64, U32_MAX, max_packed);
BUG_ON(!bch2_bkey_pack_key(k, &uk, f));
}
}
break;
case 4: {
struct bkey_s u;
if (!bkey_packed(k)) {
u = bkey_i_to_s(packed_to_bkey(k));
} else {
uk = __bch2_bkey_unpack_key(f, k);
u.k = &uk;
u.v = bkeyp_val(f, k);
}
if (big_endian != CPU_BIG_ENDIAN)
bch2_bkey_swab_val(u);
ops = bch2_bkey_type_ops(k->type);
if (ops->compat)
ops->compat(btree_id, version, big_endian, write, u);
break;
}
default:
BUG();
}
}
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