diff options
Diffstat (limited to 'c_src/libbcachefs/inode.h')
| -rw-r--r-- | c_src/libbcachefs/inode.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/c_src/libbcachefs/inode.h b/c_src/libbcachefs/inode.h new file mode 100644 index 00000000..b63f3125 --- /dev/null +++ b/c_src/libbcachefs/inode.h @@ -0,0 +1,212 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _BCACHEFS_INODE_H +#define _BCACHEFS_INODE_H + +#include "bkey.h" +#include "bkey_methods.h" +#include "opts.h" + +enum bkey_invalid_flags; +extern const char * const bch2_inode_opts[]; + +int bch2_inode_invalid(struct bch_fs *, struct bkey_s_c, + enum bkey_invalid_flags, struct printbuf *); +int bch2_inode_v2_invalid(struct bch_fs *, struct bkey_s_c, + enum bkey_invalid_flags, struct printbuf *); +int bch2_inode_v3_invalid(struct bch_fs *, struct bkey_s_c, + enum bkey_invalid_flags, struct printbuf *); +void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); + +int bch2_trigger_inode(struct btree_trans *, enum btree_id, unsigned, + struct bkey_s_c, struct bkey_s, unsigned); + +#define bch2_bkey_ops_inode ((struct bkey_ops) { \ + .key_invalid = bch2_inode_invalid, \ + .val_to_text = bch2_inode_to_text, \ + .trigger = bch2_trigger_inode, \ + .min_val_size = 16, \ +}) + +#define bch2_bkey_ops_inode_v2 ((struct bkey_ops) { \ + .key_invalid = bch2_inode_v2_invalid, \ + .val_to_text = bch2_inode_to_text, \ + .trigger = bch2_trigger_inode, \ + .min_val_size = 32, \ +}) + +#define bch2_bkey_ops_inode_v3 ((struct bkey_ops) { \ + .key_invalid = bch2_inode_v3_invalid, \ + .val_to_text = bch2_inode_to_text, \ + .trigger = bch2_trigger_inode, \ + .min_val_size = 48, \ +}) + +static inline bool bkey_is_inode(const struct bkey *k) +{ + return k->type == KEY_TYPE_inode || + k->type == KEY_TYPE_inode_v2 || + k->type == KEY_TYPE_inode_v3; +} + +int bch2_inode_generation_invalid(struct bch_fs *, struct bkey_s_c, + enum bkey_invalid_flags, struct printbuf *); +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, \ + .min_val_size = 8, \ +}) + +#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; + u64 bi_size; + u64 bi_sectors; + u64 bi_version; + u32 bi_flags; + u16 bi_mode; + +#define x(_name, _bits) u##_bits _name; + BCH_INODE_FIELDS_v3() +#undef x +}; + +struct bkey_inode_buf { + struct bkey_i_inode_v3 inode; + +#define x(_name, _bits) + 8 + _bits / 8 + u8 _pad[0 + BCH_INODE_FIELDS_v3()]; +#undef x +} __packed __aligned(8); + +void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *); +int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *); +struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *); + +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_flags(struct btree_trans *, struct btree_iter *, + struct bch_inode_unpacked *, enum btree_update_flags); + +static inline int bch2_inode_write(struct btree_trans *trans, + struct btree_iter *iter, + struct bch_inode_unpacked *inode) +{ + return bch2_inode_write_flags(trans, iter, inode, 0); +} + +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_nowarn_trans(struct btree_trans *, + subvol_inum, + struct bch_inode_unpacked *); +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 *); + +#define inode_opt_get(_c, _inode, _name) \ + ((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name) + +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 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 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; + } +} + +int bch2_inode_nlink_inc(struct bch_inode_unpacked *); +void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *); + +struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *); +void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *, + struct bch_inode_unpacked *); +int bch2_inum_opts_get(struct btree_trans*, subvol_inum, struct bch_io_opts *); + +int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32); +int bch2_delete_dead_inodes(struct bch_fs *); + +#endif /* _BCACHEFS_INODE_H */ |