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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_INODE_FORMAT_H
#define _BCACHEFS_INODE_FORMAT_H
#define BLOCKDEV_INODE_MAX 4096
#define BCACHEFS_ROOT_INO 4096
struct bch_inode {
struct bch_val v;
__le64 bi_hash_seed;
__le32 bi_flags;
__le16 bi_mode;
__u8 fields[];
} __packed __aligned(8);
struct bch_inode_v2 {
struct bch_val v;
__le64 bi_journal_seq;
__le64 bi_hash_seed;
__le64 bi_flags;
__le16 bi_mode;
__u8 fields[];
} __packed __aligned(8);
struct bch_inode_v3 {
struct bch_val v;
__le64 bi_journal_seq;
__le64 bi_hash_seed;
__le64 bi_flags;
__le64 bi_sectors;
__le64 bi_size;
__le64 bi_version;
__u8 fields[];
} __packed __aligned(8);
#define INODEv3_FIELDS_START_INITIAL 6
#define INODEv3_FIELDS_START_CUR (offsetof(struct bch_inode_v3, fields) / sizeof(__u64))
struct bch_inode_generation {
struct bch_val v;
__le32 bi_generation;
__le32 pad;
} __packed __aligned(8);
/*
* bi_subvol and bi_parent_subvol are only set for subvolume roots:
*/
#define BCH_INODE_FIELDS_v2() \
x(bi_atime, 96) \
x(bi_ctime, 96) \
x(bi_mtime, 96) \
x(bi_otime, 96) \
x(bi_size, 64) \
x(bi_sectors, 64) \
x(bi_uid, 32) \
x(bi_gid, 32) \
x(bi_nlink, 32) \
x(bi_generation, 32) \
x(bi_dev, 32) \
x(bi_data_checksum, 8) \
x(bi_compression, 8) \
x(bi_project, 32) \
x(bi_background_compression, 8) \
x(bi_data_replicas, 8) \
x(bi_promote_target, 16) \
x(bi_foreground_target, 16) \
x(bi_background_target, 16) \
x(bi_erasure_code, 16) \
x(bi_fields_set, 16) \
x(bi_dir, 64) \
x(bi_dir_offset, 64) \
x(bi_subvol, 32) \
x(bi_parent_subvol, 32)
#define BCH_INODE_FIELDS_v3() \
x(bi_atime, 96) \
x(bi_ctime, 96) \
x(bi_mtime, 96) \
x(bi_otime, 96) \
x(bi_uid, 32) \
x(bi_gid, 32) \
x(bi_nlink, 32) \
x(bi_generation, 32) \
x(bi_dev, 32) \
x(bi_data_checksum, 8) \
x(bi_compression, 8) \
x(bi_project, 32) \
x(bi_background_compression, 8) \
x(bi_data_replicas, 8) \
x(bi_promote_target, 16) \
x(bi_foreground_target, 16) \
x(bi_background_target, 16) \
x(bi_erasure_code, 16) \
x(bi_fields_set, 16) \
x(bi_dir, 64) \
x(bi_dir_offset, 64) \
x(bi_subvol, 32) \
x(bi_parent_subvol, 32) \
x(bi_nocow, 8)
/* subset of BCH_INODE_FIELDS */
#define BCH_INODE_OPTS() \
x(data_checksum, 8) \
x(compression, 8) \
x(project, 32) \
x(background_compression, 8) \
x(data_replicas, 8) \
x(promote_target, 16) \
x(foreground_target, 16) \
x(background_target, 16) \
x(erasure_code, 16) \
x(nocow, 8)
enum inode_opt_id {
#define x(name, ...) \
Inode_opt_##name,
BCH_INODE_OPTS()
#undef x
Inode_opt_nr,
};
#define BCH_INODE_FLAGS() \
x(sync, 0) \
x(immutable, 1) \
x(append, 2) \
x(nodump, 3) \
x(noatime, 4) \
x(i_size_dirty, 5) \
x(i_sectors_dirty, 6) \
x(unlinked, 7) \
x(backptr_untrusted, 8) \
x(has_child_snapshot, 9)
/* bits 20+ reserved for packed fields below: */
enum bch_inode_flags {
#define x(t, n) BCH_INODE_##t = 1U << n,
BCH_INODE_FLAGS()
#undef x
};
enum __bch_inode_flags {
#define x(t, n) __BCH_INODE_##t = n,
BCH_INODE_FLAGS()
#undef x
};
LE32_BITMASK(INODE_STR_HASH, struct bch_inode, bi_flags, 20, 24);
LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 31);
LE32_BITMASK(INODE_NEW_VARINT, struct bch_inode, bi_flags, 31, 32);
LE64_BITMASK(INODEv2_STR_HASH, struct bch_inode_v2, bi_flags, 20, 24);
LE64_BITMASK(INODEv2_NR_FIELDS, struct bch_inode_v2, bi_flags, 24, 31);
LE64_BITMASK(INODEv3_STR_HASH, struct bch_inode_v3, bi_flags, 20, 24);
LE64_BITMASK(INODEv3_NR_FIELDS, struct bch_inode_v3, bi_flags, 24, 31);
LE64_BITMASK(INODEv3_FIELDS_START,
struct bch_inode_v3, bi_flags, 31, 36);
LE64_BITMASK(INODEv3_MODE, struct bch_inode_v3, bi_flags, 36, 52);
#endif /* _BCACHEFS_INODE_FORMAT_H */
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