1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _BCACHEFS_INODE_H 3 #define _BCACHEFS_INODE_H 4 5 #include "bkey.h" 6 #include "bkey_methods.h" 7 #include "opts.h" 8 9 enum bch_validate_flags; 10 extern const char * const bch2_inode_opts[]; 11 12 int bch2_inode_validate(struct bch_fs *, struct bkey_s_c, 13 enum bch_validate_flags); 14 int bch2_inode_v2_validate(struct bch_fs *, struct bkey_s_c, 15 enum bch_validate_flags); 16 int bch2_inode_v3_validate(struct bch_fs *, struct bkey_s_c, 17 enum bch_validate_flags); 18 void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 19 20 int bch2_trigger_inode(struct btree_trans *, enum btree_id, unsigned, 21 struct bkey_s_c, struct bkey_s, 22 enum btree_iter_update_trigger_flags); 23 24 #define bch2_bkey_ops_inode ((struct bkey_ops) { \ 25 .key_validate = bch2_inode_validate, \ 26 .val_to_text = bch2_inode_to_text, \ 27 .trigger = bch2_trigger_inode, \ 28 .min_val_size = 16, \ 29 }) 30 31 #define bch2_bkey_ops_inode_v2 ((struct bkey_ops) { \ 32 .key_validate = bch2_inode_v2_validate, \ 33 .val_to_text = bch2_inode_to_text, \ 34 .trigger = bch2_trigger_inode, \ 35 .min_val_size = 32, \ 36 }) 37 38 #define bch2_bkey_ops_inode_v3 ((struct bkey_ops) { \ 39 .key_validate = bch2_inode_v3_validate, \ 40 .val_to_text = bch2_inode_to_text, \ 41 .trigger = bch2_trigger_inode, \ 42 .min_val_size = 48, \ 43 }) 44 45 static inline bool bkey_is_inode(const struct bkey *k) 46 { 47 return k->type == KEY_TYPE_inode || 48 k->type == KEY_TYPE_inode_v2 || 49 k->type == KEY_TYPE_inode_v3; 50 } 51 52 int bch2_inode_generation_validate(struct bch_fs *, struct bkey_s_c, 53 enum bch_validate_flags); 54 void bch2_inode_generation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 55 56 #define bch2_bkey_ops_inode_generation ((struct bkey_ops) { \ 57 .key_validate = bch2_inode_generation_validate, \ 58 .val_to_text = bch2_inode_generation_to_text, \ 59 .min_val_size = 8, \ 60 }) 61 62 #if 0 63 typedef struct { 64 u64 lo; 65 u32 hi; 66 } __packed __aligned(4) u96; 67 #endif 68 typedef u64 u96; 69 70 struct bch_inode_unpacked { 71 u64 bi_inum; 72 u64 bi_journal_seq; 73 __le64 bi_hash_seed; 74 u64 bi_size; 75 u64 bi_sectors; 76 u64 bi_version; 77 u32 bi_flags; 78 u16 bi_mode; 79 80 #define x(_name, _bits) u##_bits _name; 81 BCH_INODE_FIELDS_v3() 82 #undef x 83 }; 84 85 struct bkey_inode_buf { 86 struct bkey_i_inode_v3 inode; 87 88 #define x(_name, _bits) + 8 + _bits / 8 89 u8 _pad[0 + BCH_INODE_FIELDS_v3()]; 90 #undef x 91 }; 92 93 void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *); 94 int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *); 95 struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *); 96 97 void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *); 98 99 int bch2_inode_peek_nowarn(struct btree_trans *, struct btree_iter *, 100 struct bch_inode_unpacked *, subvol_inum, unsigned); 101 int bch2_inode_peek(struct btree_trans *, struct btree_iter *, 102 struct bch_inode_unpacked *, subvol_inum, unsigned); 103 104 int bch2_inode_write_flags(struct btree_trans *, struct btree_iter *, 105 struct bch_inode_unpacked *, enum btree_iter_update_trigger_flags); 106 107 static inline int bch2_inode_write(struct btree_trans *trans, 108 struct btree_iter *iter, 109 struct bch_inode_unpacked *inode) 110 { 111 return bch2_inode_write_flags(trans, iter, inode, 0); 112 } 113 114 int __bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32); 115 int bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32); 116 117 void bch2_inode_init_early(struct bch_fs *, 118 struct bch_inode_unpacked *); 119 void bch2_inode_init_late(struct bch_inode_unpacked *, u64, 120 uid_t, gid_t, umode_t, dev_t, 121 struct bch_inode_unpacked *); 122 void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *, 123 uid_t, gid_t, umode_t, dev_t, 124 struct bch_inode_unpacked *); 125 126 int bch2_inode_create(struct btree_trans *, struct btree_iter *, 127 struct bch_inode_unpacked *, u32, u64); 128 129 int bch2_inode_rm(struct bch_fs *, subvol_inum); 130 131 int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *, 132 subvol_inum, 133 struct bch_inode_unpacked *); 134 int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum, 135 struct bch_inode_unpacked *); 136 int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum, 137 struct bch_inode_unpacked *); 138 139 #define inode_opt_get(_c, _inode, _name) \ 140 ((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name) 141 142 static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode, 143 enum inode_opt_id id, u64 v) 144 { 145 switch (id) { 146 #define x(_name, ...) \ 147 case Inode_opt_##_name: \ 148 inode->bi_##_name = v; \ 149 break; 150 BCH_INODE_OPTS() 151 #undef x 152 default: 153 BUG(); 154 } 155 } 156 157 static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode, 158 enum inode_opt_id id) 159 { 160 switch (id) { 161 #define x(_name, ...) \ 162 case Inode_opt_##_name: \ 163 return inode->bi_##_name; 164 BCH_INODE_OPTS() 165 #undef x 166 default: 167 BUG(); 168 } 169 } 170 171 static inline u8 mode_to_type(umode_t mode) 172 { 173 return (mode >> 12) & 15; 174 } 175 176 static inline u8 inode_d_type(struct bch_inode_unpacked *inode) 177 { 178 return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode); 179 } 180 181 static inline u32 bch2_inode_flags(struct bkey_s_c k) 182 { 183 switch (k.k->type) { 184 case KEY_TYPE_inode: 185 return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags); 186 case KEY_TYPE_inode_v2: 187 return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags); 188 case KEY_TYPE_inode_v3: 189 return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags); 190 default: 191 return 0; 192 } 193 } 194 195 /* i_nlink: */ 196 197 static inline unsigned nlink_bias(umode_t mode) 198 { 199 return S_ISDIR(mode) ? 2 : 1; 200 } 201 202 static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi) 203 { 204 return bi->bi_flags & BCH_INODE_unlinked 205 ? 0 206 : bi->bi_nlink + nlink_bias(bi->bi_mode); 207 } 208 209 static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi, 210 unsigned nlink) 211 { 212 if (nlink) { 213 bi->bi_nlink = nlink - nlink_bias(bi->bi_mode); 214 bi->bi_flags &= ~BCH_INODE_unlinked; 215 } else { 216 bi->bi_nlink = 0; 217 bi->bi_flags |= BCH_INODE_unlinked; 218 } 219 } 220 221 int bch2_inode_nlink_inc(struct bch_inode_unpacked *); 222 void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *); 223 224 static inline bool bch2_inode_should_have_bp(struct bch_inode_unpacked *inode) 225 { 226 bool inode_has_bp = inode->bi_dir || inode->bi_dir_offset; 227 228 return S_ISDIR(inode->bi_mode) || 229 (!inode->bi_nlink && inode_has_bp); 230 } 231 232 struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *); 233 void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *, 234 struct bch_inode_unpacked *); 235 int bch2_inum_opts_get(struct btree_trans*, subvol_inum, struct bch_io_opts *); 236 237 int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32); 238 int bch2_delete_dead_inodes(struct bch_fs *); 239 240 #endif /* _BCACHEFS_INODE_H */ 241