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 #include "snapshot.h" 9 10 extern const char * const bch2_inode_opts[]; 11 12 int bch2_inode_validate(struct bch_fs *, struct bkey_s_c, 13 struct bkey_validate_context); 14 int bch2_inode_v2_validate(struct bch_fs *, struct bkey_s_c, 15 struct bkey_validate_context); 16 int bch2_inode_v3_validate(struct bch_fs *, struct bkey_s_c, 17 struct bkey_validate_context); 18 void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 19 20 int __bch2_inode_has_child_snapshots(struct btree_trans *, struct bpos); 21 22 static inline int bch2_inode_has_child_snapshots(struct btree_trans *trans, struct bpos pos) 23 { 24 return bch2_snapshot_is_leaf(trans->c, pos.snapshot) <= 0 25 ? __bch2_inode_has_child_snapshots(trans, pos) 26 : 0; 27 } 28 29 int bch2_trigger_inode(struct btree_trans *, enum btree_id, unsigned, 30 struct bkey_s_c, struct bkey_s, 31 enum btree_iter_update_trigger_flags); 32 33 #define bch2_bkey_ops_inode ((struct bkey_ops) { \ 34 .key_validate = bch2_inode_validate, \ 35 .val_to_text = bch2_inode_to_text, \ 36 .trigger = bch2_trigger_inode, \ 37 .min_val_size = 16, \ 38 }) 39 40 #define bch2_bkey_ops_inode_v2 ((struct bkey_ops) { \ 41 .key_validate = bch2_inode_v2_validate, \ 42 .val_to_text = bch2_inode_to_text, \ 43 .trigger = bch2_trigger_inode, \ 44 .min_val_size = 32, \ 45 }) 46 47 #define bch2_bkey_ops_inode_v3 ((struct bkey_ops) { \ 48 .key_validate = bch2_inode_v3_validate, \ 49 .val_to_text = bch2_inode_to_text, \ 50 .trigger = bch2_trigger_inode, \ 51 .min_val_size = 48, \ 52 }) 53 54 static inline bool bkey_is_inode(const struct bkey *k) 55 { 56 return k->type == KEY_TYPE_inode || 57 k->type == KEY_TYPE_inode_v2 || 58 k->type == KEY_TYPE_inode_v3; 59 } 60 61 int bch2_inode_generation_validate(struct bch_fs *, struct bkey_s_c, 62 struct bkey_validate_context); 63 void bch2_inode_generation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 64 65 #define bch2_bkey_ops_inode_generation ((struct bkey_ops) { \ 66 .key_validate = bch2_inode_generation_validate, \ 67 .val_to_text = bch2_inode_generation_to_text, \ 68 .min_val_size = 8, \ 69 }) 70 71 int bch2_inode_alloc_cursor_validate(struct bch_fs *, struct bkey_s_c, 72 struct bkey_validate_context); 73 void bch2_inode_alloc_cursor_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 74 75 #define bch2_bkey_ops_inode_alloc_cursor ((struct bkey_ops) { \ 76 .key_validate = bch2_inode_alloc_cursor_validate, \ 77 .val_to_text = bch2_inode_alloc_cursor_to_text, \ 78 .min_val_size = 16, \ 79 }) 80 81 #if 0 82 typedef struct { 83 u64 lo; 84 u32 hi; 85 } __packed __aligned(4) u96; 86 #endif 87 typedef u64 u96; 88 89 struct bch_inode_unpacked { 90 u64 bi_inum; 91 u32 bi_snapshot; 92 u64 bi_journal_seq; 93 __le64 bi_hash_seed; 94 u64 bi_size; 95 u64 bi_sectors; 96 u64 bi_version; 97 u32 bi_flags; 98 u16 bi_mode; 99 100 #define x(_name, _bits) u##_bits _name; 101 BCH_INODE_FIELDS_v3() 102 #undef x 103 }; 104 BITMASK(INODE_STR_HASH, struct bch_inode_unpacked, bi_flags, 20, 24); 105 106 struct bkey_inode_buf { 107 struct bkey_i_inode_v3 inode; 108 109 #define x(_name, _bits) + 8 + _bits / 8 110 u8 _pad[0 + BCH_INODE_FIELDS_v3()]; 111 #undef x 112 }; 113 114 void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *); 115 int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *); 116 struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *); 117 118 void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *); 119 120 int __bch2_inode_peek(struct btree_trans *, struct btree_iter *, 121 struct bch_inode_unpacked *, subvol_inum, unsigned, bool); 122 123 static inline int bch2_inode_peek_nowarn(struct btree_trans *trans, 124 struct btree_iter *iter, 125 struct bch_inode_unpacked *inode, 126 subvol_inum inum, unsigned flags) 127 { 128 return __bch2_inode_peek(trans, iter, inode, inum, flags, false); 129 } 130 131 static inline int bch2_inode_peek(struct btree_trans *trans, 132 struct btree_iter *iter, 133 struct bch_inode_unpacked *inode, 134 subvol_inum inum, unsigned flags) 135 { 136 return __bch2_inode_peek(trans, iter, inode, inum, flags, true); 137 } 138 139 int bch2_inode_find_by_inum_snapshot(struct btree_trans *, u64, u32, 140 struct bch_inode_unpacked *, unsigned); 141 int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *, 142 subvol_inum, 143 struct bch_inode_unpacked *); 144 int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum, 145 struct bch_inode_unpacked *); 146 int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum, 147 struct bch_inode_unpacked *); 148 149 int bch2_inode_find_snapshot_root(struct btree_trans *trans, u64 inum, 150 struct bch_inode_unpacked *root); 151 152 int bch2_inode_write_flags(struct btree_trans *, struct btree_iter *, 153 struct bch_inode_unpacked *, enum btree_iter_update_trigger_flags); 154 155 static inline int bch2_inode_write(struct btree_trans *trans, 156 struct btree_iter *iter, 157 struct bch_inode_unpacked *inode) 158 { 159 return bch2_inode_write_flags(trans, iter, inode, 0); 160 } 161 162 int __bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *); 163 int bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *); 164 165 void bch2_inode_init_early(struct bch_fs *, 166 struct bch_inode_unpacked *); 167 void bch2_inode_init_late(struct bch_fs *, struct bch_inode_unpacked *, u64, 168 uid_t, gid_t, umode_t, dev_t, 169 struct bch_inode_unpacked *); 170 void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *, 171 uid_t, gid_t, umode_t, dev_t, 172 struct bch_inode_unpacked *); 173 174 int bch2_inode_create(struct btree_trans *, struct btree_iter *, 175 struct bch_inode_unpacked *, u32, u64); 176 177 int bch2_inode_rm(struct bch_fs *, subvol_inum); 178 179 #define inode_opt_get(_c, _inode, _name) \ 180 ((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name) 181 182 static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode, 183 enum inode_opt_id id, u64 v) 184 { 185 switch (id) { 186 #define x(_name, ...) \ 187 case Inode_opt_##_name: \ 188 inode->bi_##_name = v; \ 189 break; 190 BCH_INODE_OPTS() 191 #undef x 192 default: 193 BUG(); 194 } 195 } 196 197 static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode, 198 enum inode_opt_id id) 199 { 200 switch (id) { 201 #define x(_name, ...) \ 202 case Inode_opt_##_name: \ 203 return inode->bi_##_name; 204 BCH_INODE_OPTS() 205 #undef x 206 default: 207 BUG(); 208 } 209 } 210 211 static inline u8 mode_to_type(umode_t mode) 212 { 213 return (mode >> 12) & 15; 214 } 215 216 static inline u8 inode_d_type(struct bch_inode_unpacked *inode) 217 { 218 return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode); 219 } 220 221 static inline u32 bch2_inode_flags(struct bkey_s_c k) 222 { 223 switch (k.k->type) { 224 case KEY_TYPE_inode: 225 return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags); 226 case KEY_TYPE_inode_v2: 227 return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags); 228 case KEY_TYPE_inode_v3: 229 return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags); 230 default: 231 return 0; 232 } 233 } 234 235 static inline unsigned bkey_inode_mode(struct bkey_s_c k) 236 { 237 switch (k.k->type) { 238 case KEY_TYPE_inode: 239 return le16_to_cpu(bkey_s_c_to_inode(k).v->bi_mode); 240 case KEY_TYPE_inode_v2: 241 return le16_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_mode); 242 case KEY_TYPE_inode_v3: 243 return INODEv3_MODE(bkey_s_c_to_inode_v3(k).v); 244 default: 245 return 0; 246 } 247 } 248 249 static inline bool bch2_inode_casefold(struct bch_fs *c, const struct bch_inode_unpacked *bi) 250 { 251 /* inode opts are stored with a +1 bias: 0 means "unset, use fs opt" */ 252 return bi->bi_casefold 253 ? bi->bi_casefold - 1 254 : c->opts.casefold; 255 } 256 257 static inline bool bch2_inode_has_backpointer(const struct bch_inode_unpacked *bi) 258 { 259 return bi->bi_dir || bi->bi_dir_offset; 260 } 261 262 /* i_nlink: */ 263 264 static inline unsigned nlink_bias(umode_t mode) 265 { 266 return S_ISDIR(mode) ? 2 : 1; 267 } 268 269 static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi) 270 { 271 return bi->bi_flags & BCH_INODE_unlinked 272 ? 0 273 : bi->bi_nlink + nlink_bias(bi->bi_mode); 274 } 275 276 static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi, 277 unsigned nlink) 278 { 279 if (nlink) { 280 bi->bi_nlink = nlink - nlink_bias(bi->bi_mode); 281 bi->bi_flags &= ~BCH_INODE_unlinked; 282 } else { 283 bi->bi_nlink = 0; 284 bi->bi_flags |= BCH_INODE_unlinked; 285 } 286 } 287 288 int bch2_inode_nlink_inc(struct bch_inode_unpacked *); 289 void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *); 290 291 struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *); 292 void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *, 293 struct bch_inode_unpacked *); 294 int bch2_inum_opts_get(struct btree_trans *, subvol_inum, struct bch_io_opts *); 295 int bch2_inode_set_casefold(struct btree_trans *, subvol_inum, 296 struct bch_inode_unpacked *, unsigned); 297 298 #include "rebalance.h" 299 300 static inline struct bch_extent_rebalance 301 bch2_inode_rebalance_opts_get(struct bch_fs *c, struct bch_inode_unpacked *inode) 302 { 303 struct bch_io_opts io_opts; 304 bch2_inode_opts_get(&io_opts, c, inode); 305 return io_opts_to_rebalance_opts(c, &io_opts); 306 } 307 308 #define BCACHEFS_ROOT_SUBVOL_INUM \ 309 ((subvol_inum) { BCACHEFS_ROOT_SUBVOL, BCACHEFS_ROOT_INO }) 310 311 static inline bool subvol_inum_eq(subvol_inum a, subvol_inum b) 312 { 313 return a.subvol == b.subvol && a.inum == b.inum; 314 } 315 316 int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32); 317 int bch2_delete_dead_inodes(struct bch_fs *); 318 319 #endif /* _BCACHEFS_INODE_H */ 320