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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_INODE_H
#define _BCACHEFS_INODE_H
#include "opts.h"
extern const char * const bch2_inode_opts[];
const char *bch2_inode_invalid(const struct bch_fs *, struct bkey_s_c);
const char *bch2_inode_v2_invalid(const struct bch_fs *, struct bkey_s_c);
void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
#define bch2_bkey_ops_inode (struct bkey_ops) { \
.key_invalid = bch2_inode_invalid, \
.val_to_text = bch2_inode_to_text, \
}
#define bch2_bkey_ops_inode_v2 (struct bkey_ops) { \
.key_invalid = bch2_inode_v2_invalid, \
.val_to_text = bch2_inode_to_text, \
}
static inline bool bkey_is_inode(const struct bkey *k)
{
return k->type == KEY_TYPE_inode ||
k->type == KEY_TYPE_inode_v2;
}
const char *bch2_inode_generation_invalid(const struct bch_fs *,
struct bkey_s_c);
void bch2_inode_generation_to_text(struct printbuf *, struct bch_fs *,
struct bkey_s_c);
#define bch2_bkey_ops_inode_generation (struct bkey_ops) { \
.key_invalid = bch2_inode_generation_invalid, \
.val_to_text = bch2_inode_generation_to_text, \
}
#if 0
typedef struct {
u64 lo;
u32 hi;
} __packed __aligned(4) u96;
#endif
typedef u64 u96;
struct bch_inode_unpacked {
u64 bi_inum;
u64 bi_journal_seq;
__le64 bi_hash_seed;
u32 bi_flags;
u16 bi_mode;
#define x(_name, _bits) u##_bits _name;
BCH_INODE_FIELDS()
#undef x
};
struct bkey_inode_buf {
struct bkey_i_inode_v2 inode;
#define x(_name, _bits) + 8 + _bits / 8
u8 _pad[0 + BCH_INODE_FIELDS()];
#undef x
} __attribute__((packed, aligned(8)));
void bch2_inode_pack(struct bch_fs *, struct bkey_inode_buf *,
const struct bch_inode_unpacked *);
int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *);
void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *);
int bch2_inode_peek(struct btree_trans *, struct btree_iter *,
struct bch_inode_unpacked *, subvol_inum, unsigned);
int bch2_inode_write(struct btree_trans *, struct btree_iter *,
struct bch_inode_unpacked *);
void bch2_inode_init_early(struct bch_fs *,
struct bch_inode_unpacked *);
void bch2_inode_init_late(struct bch_inode_unpacked *, u64,
uid_t, gid_t, umode_t, dev_t,
struct bch_inode_unpacked *);
void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *,
uid_t, gid_t, umode_t, dev_t,
struct bch_inode_unpacked *);
int bch2_inode_create(struct btree_trans *, struct btree_iter *,
struct bch_inode_unpacked *, u32, u64);
int bch2_inode_rm(struct bch_fs *, subvol_inum);
int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum,
struct bch_inode_unpacked *);
int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum,
struct bch_inode_unpacked *);
static inline struct bch_io_opts bch2_inode_opts_get(struct bch_inode_unpacked *inode)
{
struct bch_io_opts ret = { 0 };
#define x(_name, _bits) \
if (inode->bi_##_name) \
opt_set(ret, _name, inode->bi_##_name - 1);
BCH_INODE_OPTS()
#undef x
return ret;
}
static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode,
enum inode_opt_id id, u64 v)
{
switch (id) {
#define x(_name, ...) \
case Inode_opt_##_name: \
inode->bi_##_name = v; \
break;
BCH_INODE_OPTS()
#undef x
default:
BUG();
}
}
static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode,
enum inode_opt_id id)
{
switch (id) {
#define x(_name, ...) \
case Inode_opt_##_name: \
return inode->bi_##_name;
BCH_INODE_OPTS()
#undef x
default:
BUG();
}
}
static inline struct bch_io_opts
io_opts(struct bch_fs *c, struct bch_inode_unpacked *inode)
{
struct bch_io_opts opts = bch2_opts_to_inode_opts(c->opts);
bch2_io_opts_apply(&opts, bch2_inode_opts_get(inode));
return opts;
}
static inline u8 mode_to_type(umode_t mode)
{
return (mode >> 12) & 15;
}
static inline u8 inode_d_type(struct bch_inode_unpacked *inode)
{
return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode);
}
/* i_nlink: */
static inline unsigned nlink_bias(umode_t mode)
{
return S_ISDIR(mode) ? 2 : 1;
}
static inline void bch2_inode_nlink_inc(struct bch_inode_unpacked *bi)
{
if (bi->bi_flags & BCH_INODE_UNLINKED)
bi->bi_flags &= ~BCH_INODE_UNLINKED;
else
bi->bi_nlink++;
}
static inline void bch2_inode_nlink_dec(struct bch_inode_unpacked *bi)
{
BUG_ON(bi->bi_flags & BCH_INODE_UNLINKED);
if (bi->bi_nlink)
bi->bi_nlink--;
else
bi->bi_flags |= BCH_INODE_UNLINKED;
}
static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi)
{
return bi->bi_flags & BCH_INODE_UNLINKED
? 0
: bi->bi_nlink + nlink_bias(bi->bi_mode);
}
static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi,
unsigned nlink)
{
if (nlink) {
bi->bi_nlink = nlink - nlink_bias(bi->bi_mode);
bi->bi_flags &= ~BCH_INODE_UNLINKED;
} else {
bi->bi_nlink = 0;
bi->bi_flags |= BCH_INODE_UNLINKED;
}
}
#endif /* _BCACHEFS_INODE_H */
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