1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _BCACHEFS_DIRENT_H 3 #define _BCACHEFS_DIRENT_H 4 5 #include "str_hash.h" 6 7 extern const struct bch_hash_desc bch2_dirent_hash_desc; 8 9 int bch2_dirent_validate(struct bch_fs *, struct bkey_s_c, 10 struct bkey_validate_context); 11 void bch2_dirent_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 12 13 #define bch2_bkey_ops_dirent ((struct bkey_ops) { \ 14 .key_validate = bch2_dirent_validate, \ 15 .val_to_text = bch2_dirent_to_text, \ 16 .min_val_size = 16, \ 17 }) 18 19 struct qstr; 20 struct file; 21 struct dir_context; 22 struct bch_fs; 23 struct bch_hash_info; 24 struct bch_inode_info; 25 26 struct qstr bch2_dirent_get_name(struct bkey_s_c_dirent d); 27 28 static inline unsigned dirent_val_u64s(unsigned len) 29 { 30 return DIV_ROUND_UP(offsetof(struct bch_dirent, d_name) + len, 31 sizeof(u64)); 32 } 33 34 static inline unsigned int dirent_occupied_size(const struct qstr *name) 35 { 36 return (BKEY_U64s + dirent_val_u64s(name->len)) * sizeof(u64); 37 } 38 39 int bch2_dirent_read_target(struct btree_trans *, subvol_inum, 40 struct bkey_s_c_dirent, subvol_inum *); 41 42 static inline void dirent_copy_target(struct bkey_i_dirent *dst, 43 struct bkey_s_c_dirent src) 44 { 45 dst->v.d_inum = src.v->d_inum; 46 dst->v.d_type = src.v->d_type; 47 } 48 49 int bch2_dirent_create_snapshot(struct btree_trans *, u32, u64, u32, 50 const struct bch_hash_info *, u8, 51 const struct qstr *, u64, u64 *, 52 enum btree_iter_update_trigger_flags); 53 int bch2_dirent_create(struct btree_trans *, subvol_inum, 54 const struct bch_hash_info *, u8, 55 const struct qstr *, u64, u64 *, 56 enum btree_iter_update_trigger_flags); 57 58 static inline unsigned vfs_d_type(unsigned type) 59 { 60 return type == DT_SUBVOL ? DT_DIR : type; 61 } 62 63 enum bch_rename_mode { 64 BCH_RENAME, 65 BCH_RENAME_OVERWRITE, 66 BCH_RENAME_EXCHANGE, 67 }; 68 69 int bch2_dirent_rename(struct btree_trans *, 70 subvol_inum, struct bch_hash_info *, 71 subvol_inum, struct bch_hash_info *, 72 const struct qstr *, subvol_inum *, u64 *, 73 const struct qstr *, subvol_inum *, u64 *, 74 enum bch_rename_mode); 75 76 int bch2_dirent_lookup_trans(struct btree_trans *, struct btree_iter *, 77 subvol_inum, const struct bch_hash_info *, 78 const struct qstr *, subvol_inum *, unsigned); 79 u64 bch2_dirent_lookup(struct bch_fs *, subvol_inum, 80 const struct bch_hash_info *, 81 const struct qstr *, subvol_inum *); 82 83 int bch2_empty_dir_snapshot(struct btree_trans *, u64, u32, u32); 84 int bch2_empty_dir_trans(struct btree_trans *, subvol_inum); 85 int bch2_readdir(struct bch_fs *, subvol_inum, struct dir_context *); 86 87 #endif /* _BCACHEFS_DIRENT_H */ 88