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