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 enum bch_validate_flags; 11 extern const char * const bch2_inode_opts[]; 12 13 int bch2_inode_validate(struct bch_fs *, struct bkey_s_c, 14 enum bch_validate_flags); 15 int bch2_inode_v2_validate(struct bch_fs *, struct bkey_s_c, 16 enum bch_validate_flags); 17 int bch2_inode_v3_validate(struct bch_fs *, struct bkey_s_c, 18 enum bch_validate_flags); 19 void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 20 21 int __bch2_inode_has_child_snapshots(struct btree_trans *, struct bpos); 22 23 static inline int bch2_inode_has_child_snapshots(struct btree_trans *trans, struct bpos pos) 24 { 25 return bch2_snapshot_is_leaf(trans->c, pos.snapshot) <= 0 26 ? __bch2_inode_has_child_snapshots(trans, pos) 27 : 0; 28 } 29 30 int bch2_trigger_inode(struct btree_trans *, enum btree_id, unsigned, 31 struct bkey_s_c, struct bkey_s, 32 enum btree_iter_update_trigger_flags); 33 34 #define bch2_bkey_ops_inode ((struct bkey_ops) { \ 35 .key_validate = bch2_inode_validate, \ 36 .val_to_text = bch2_inode_to_text, \ 37 .trigger = bch2_trigger_inode, \ 38 .min_val_size = 16, \ 39 }) 40 41 #define bch2_bkey_ops_inode_v2 ((struct bkey_ops) { \ 42 .key_validate = bch2_inode_v2_validate, \ 43 .val_to_text = bch2_inode_to_text, \ 44 .trigger = bch2_trigger_inode, \ 45 .min_val_size = 32, \ 46 }) 47 48 #define bch2_bkey_ops_inode_v3 ((struct bkey_ops) { \ 49 .key_validate = bch2_inode_v3_validate, \ 50 .val_to_text = bch2_inode_to_text, \ 51 .trigger = bch2_trigger_inode, \ 52 .min_val_size = 48, \ 53 }) 54 55 static inline bool bkey_is_inode(const struct bkey *k) 56 { 57 return k->type == KEY_TYPE_inode || 58 k->type == KEY_TYPE_inode_v2 || 59 k->type == KEY_TYPE_inode_v3; 60 } 61 62 int bch2_inode_generation_validate(struct bch_fs *, struct bkey_s_c, 63 enum bch_validate_flags); 64 void bch2_inode_generation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 65 66 #define bch2_bkey_ops_inode_generation ((struct bkey_ops) { \ 67 .key_validate = bch2_inode_generation_validate, \ 68 .val_to_text = bch2_inode_generation_to_text, \ 69 .min_val_size = 8, \ 70 }) 71 72 #if 0 73 typedef struct { 74 u64 lo; 75 u32 hi; 76 } __packed __aligned(4) u96; 77 #endif 78 typedef u64 u96; 79 80 struct bch_inode_unpacked { 81 u64 bi_inum; 82 u32 bi_snapshot; 83 u64 bi_journal_seq; 84 __le64 bi_hash_seed; 85 u64 bi_size; 86 u64 bi_sectors; 87 u64 bi_version; 88 u32 bi_flags; 89 u16 bi_mode; 90 91 #define x(_name, _bits) u##_bits _name; 92 BCH_INODE_FIELDS_v3() 93 #undef x 94 }; 95 BITMASK(INODE_STR_HASH, struct bch_inode_unpacked, bi_flags, 20, 24); 96 97 struct bkey_inode_buf { 98 struct bkey_i_inode_v3 inode; 99 100 #define x(_name, _bits) + 8 + _bits / 8 101 u8 _pad[0 + BCH_INODE_FIELDS_v3()]; 102 #undef x 103 }; 104 105 void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *); 106 int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *); 107 struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *); 108 109 void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *); 110 111 int __bch2_inode_peek(struct btree_trans *, struct btree_iter *, 112 struct bch_inode_unpacked *, subvol_inum, unsigned, bool); 113 114 static inline int bch2_inode_peek_nowarn(struct btree_trans *trans, 115 struct btree_iter *iter, 116 struct bch_inode_unpacked *inode, 117 subvol_inum inum, unsigned flags) 118 { 119 return __bch2_inode_peek(trans, iter, inode, inum, flags, false); 120 } 121 122 static inline int bch2_inode_peek(struct btree_trans *trans, 123 struct btree_iter *iter, 124 struct bch_inode_unpacked *inode, 125 subvol_inum inum, unsigned flags) 126 { 127 return __bch2_inode_peek(trans, iter, inode, inum, flags, true); 128 int ret = bch2_inode_peek_nowarn(trans, iter, inode, inum, flags); 129 return ret; 130 } 131 132 int bch2_inode_write_flags(struct btree_trans *, struct btree_iter *, 133 struct bch_inode_unpacked *, enum btree_iter_update_trigger_flags); 134 135 static inline int bch2_inode_write(struct btree_trans *trans, 136 struct btree_iter *iter, 137 struct bch_inode_unpacked *inode) 138 { 139 return bch2_inode_write_flags(trans, iter, inode, 0); 140 } 141 142 int __bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *); 143 int bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *); 144 145 void bch2_inode_init_early(struct bch_fs *, 146 struct bch_inode_unpacked *); 147 void bch2_inode_init_late(struct bch_inode_unpacked *, u64, 148 uid_t, gid_t, umode_t, dev_t, 149 struct bch_inode_unpacked *); 150 void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *, 151 uid_t, gid_t, umode_t, dev_t, 152 struct bch_inode_unpacked *); 153 154 int bch2_inode_create(struct btree_trans *, struct btree_iter *, 155 struct bch_inode_unpacked *, u32, u64); 156 157 int bch2_inode_rm(struct bch_fs *, subvol_inum); 158 159 int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *, 160 subvol_inum, 161 struct bch_inode_unpacked *); 162 int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum, 163 struct bch_inode_unpacked *); 164 int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum, 165 struct bch_inode_unpacked *); 166 167 #define inode_opt_get(_c, _inode, _name) \ 168 ((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name) 169 170 static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode, 171 enum inode_opt_id id, u64 v) 172 { 173 switch (id) { 174 #define x(_name, ...) \ 175 case Inode_opt_##_name: \ 176 inode->bi_##_name = v; \ 177 break; 178 BCH_INODE_OPTS() 179 #undef x 180 default: 181 BUG(); 182 } 183 } 184 185 static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode, 186 enum inode_opt_id id) 187 { 188 switch (id) { 189 #define x(_name, ...) \ 190 case Inode_opt_##_name: \ 191 return inode->bi_##_name; 192 BCH_INODE_OPTS() 193 #undef x 194 default: 195 BUG(); 196 } 197 } 198 199 static inline u8 mode_to_type(umode_t mode) 200 { 201 return (mode >> 12) & 15; 202 } 203 204 static inline u8 inode_d_type(struct bch_inode_unpacked *inode) 205 { 206 return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode); 207 } 208 209 static inline u32 bch2_inode_flags(struct bkey_s_c k) 210 { 211 switch (k.k->type) { 212 case KEY_TYPE_inode: 213 return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags); 214 case KEY_TYPE_inode_v2: 215 return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags); 216 case KEY_TYPE_inode_v3: 217 return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags); 218 default: 219 return 0; 220 } 221 } 222 223 /* i_nlink: */ 224 225 static inline unsigned nlink_bias(umode_t mode) 226 { 227 return S_ISDIR(mode) ? 2 : 1; 228 } 229 230 static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi) 231 { 232 return bi->bi_flags & BCH_INODE_unlinked 233 ? 0 234 : bi->bi_nlink + nlink_bias(bi->bi_mode); 235 } 236 237 static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi, 238 unsigned nlink) 239 { 240 if (nlink) { 241 bi->bi_nlink = nlink - nlink_bias(bi->bi_mode); 242 bi->bi_flags &= ~BCH_INODE_unlinked; 243 } else { 244 bi->bi_nlink = 0; 245 bi->bi_flags |= BCH_INODE_unlinked; 246 } 247 } 248 249 int bch2_inode_nlink_inc(struct bch_inode_unpacked *); 250 void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *); 251 252 static inline bool bch2_inode_should_have_bp(struct bch_inode_unpacked *inode) 253 { 254 bool inode_has_bp = inode->bi_dir || inode->bi_dir_offset; 255 256 return S_ISDIR(inode->bi_mode) || 257 (!inode->bi_nlink && inode_has_bp); 258 } 259 260 struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *); 261 void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *, 262 struct bch_inode_unpacked *); 263 int bch2_inum_opts_get(struct btree_trans*, subvol_inum, struct bch_io_opts *); 264 265 int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32); 266 int bch2_delete_dead_inodes(struct bch_fs *); 267 268 #endif /* _BCACHEFS_INODE_H */ 269