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 bkey_invalid_flags; 10 extern const char * const bch2_inode_opts[]; 11 12 int bch2_inode_invalid(struct bch_fs *, struct bkey_s_c, 13 enum bkey_invalid_flags, struct printbuf *); 14 int bch2_inode_v2_invalid(struct bch_fs *, struct bkey_s_c, 15 enum bkey_invalid_flags, struct printbuf *); 16 int bch2_inode_v3_invalid(struct bch_fs *, struct bkey_s_c, 17 enum bkey_invalid_flags, struct printbuf *); 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, unsigned); 22 23 #define bch2_bkey_ops_inode ((struct bkey_ops) { \ 24 .key_invalid = bch2_inode_invalid, \ 25 .val_to_text = bch2_inode_to_text, \ 26 .trigger = bch2_trigger_inode, \ 27 .min_val_size = 16, \ 28 }) 29 30 #define bch2_bkey_ops_inode_v2 ((struct bkey_ops) { \ 31 .key_invalid = bch2_inode_v2_invalid, \ 32 .val_to_text = bch2_inode_to_text, \ 33 .trigger = bch2_trigger_inode, \ 34 .min_val_size = 32, \ 35 }) 36 37 #define bch2_bkey_ops_inode_v3 ((struct bkey_ops) { \ 38 .key_invalid = bch2_inode_v3_invalid, \ 39 .val_to_text = bch2_inode_to_text, \ 40 .trigger = bch2_trigger_inode, \ 41 .min_val_size = 48, \ 42 }) 43 44 static inline bool bkey_is_inode(const struct bkey *k) 45 { 46 return k->type == KEY_TYPE_inode || 47 k->type == KEY_TYPE_inode_v2 || 48 k->type == KEY_TYPE_inode_v3; 49 } 50 51 int bch2_inode_generation_invalid(struct bch_fs *, struct bkey_s_c, 52 enum bkey_invalid_flags, struct printbuf *); 53 void bch2_inode_generation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 54 55 #define bch2_bkey_ops_inode_generation ((struct bkey_ops) { \ 56 .key_invalid = bch2_inode_generation_invalid, \ 57 .val_to_text = bch2_inode_generation_to_text, \ 58 .min_val_size = 8, \ 59 }) 60 61 #if 0 62 typedef struct { 63 u64 lo; 64 u32 hi; 65 } __packed __aligned(4) u96; 66 #endif 67 typedef u64 u96; 68 69 struct bch_inode_unpacked { 70 u64 bi_inum; 71 u64 bi_journal_seq; 72 __le64 bi_hash_seed; 73 u64 bi_size; 74 u64 bi_sectors; 75 u64 bi_version; 76 u32 bi_flags; 77 u16 bi_mode; 78 79 #define x(_name, _bits) u##_bits _name; 80 BCH_INODE_FIELDS_v3() 81 #undef x 82 }; 83 84 struct bkey_inode_buf { 85 struct bkey_i_inode_v3 inode; 86 87 #define x(_name, _bits) + 8 + _bits / 8 88 u8 _pad[0 + BCH_INODE_FIELDS_v3()]; 89 #undef x 90 } __packed __aligned(8); 91 92 void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *); 93 int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *); 94 struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *); 95 96 void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *); 97 98 int bch2_inode_peek_nowarn(struct btree_trans *, struct btree_iter *, 99 struct bch_inode_unpacked *, subvol_inum, unsigned); 100 int bch2_inode_peek(struct btree_trans *, struct btree_iter *, 101 struct bch_inode_unpacked *, subvol_inum, unsigned); 102 103 int bch2_inode_write_flags(struct btree_trans *, struct btree_iter *, 104 struct bch_inode_unpacked *, enum btree_update_flags); 105 106 static inline int bch2_inode_write(struct btree_trans *trans, 107 struct btree_iter *iter, 108 struct bch_inode_unpacked *inode) 109 { 110 return bch2_inode_write_flags(trans, iter, inode, 0); 111 } 112 113 int __bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32); 114 int bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32); 115 116 void bch2_inode_init_early(struct bch_fs *, 117 struct bch_inode_unpacked *); 118 void bch2_inode_init_late(struct bch_inode_unpacked *, u64, 119 uid_t, gid_t, umode_t, dev_t, 120 struct bch_inode_unpacked *); 121 void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *, 122 uid_t, gid_t, umode_t, dev_t, 123 struct bch_inode_unpacked *); 124 125 int bch2_inode_create(struct btree_trans *, struct btree_iter *, 126 struct bch_inode_unpacked *, u32, u64); 127 128 int bch2_inode_rm(struct bch_fs *, subvol_inum); 129 130 int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *, 131 subvol_inum, 132 struct bch_inode_unpacked *); 133 int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum, 134 struct bch_inode_unpacked *); 135 int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum, 136 struct bch_inode_unpacked *); 137 138 #define inode_opt_get(_c, _inode, _name) \ 139 ((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name) 140 141 static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode, 142 enum inode_opt_id id, u64 v) 143 { 144 switch (id) { 145 #define x(_name, ...) \ 146 case Inode_opt_##_name: \ 147 inode->bi_##_name = v; \ 148 break; 149 BCH_INODE_OPTS() 150 #undef x 151 default: 152 BUG(); 153 } 154 } 155 156 static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode, 157 enum inode_opt_id id) 158 { 159 switch (id) { 160 #define x(_name, ...) \ 161 case Inode_opt_##_name: \ 162 return inode->bi_##_name; 163 BCH_INODE_OPTS() 164 #undef x 165 default: 166 BUG(); 167 } 168 } 169 170 static inline u8 mode_to_type(umode_t mode) 171 { 172 return (mode >> 12) & 15; 173 } 174 175 static inline u8 inode_d_type(struct bch_inode_unpacked *inode) 176 { 177 return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode); 178 } 179 180 static inline u32 bch2_inode_flags(struct bkey_s_c k) 181 { 182 switch (k.k->type) { 183 case KEY_TYPE_inode: 184 return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags); 185 case KEY_TYPE_inode_v2: 186 return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags); 187 case KEY_TYPE_inode_v3: 188 return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags); 189 default: 190 return 0; 191 } 192 } 193 194 /* i_nlink: */ 195 196 static inline unsigned nlink_bias(umode_t mode) 197 { 198 return S_ISDIR(mode) ? 2 : 1; 199 } 200 201 static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi) 202 { 203 return bi->bi_flags & BCH_INODE_unlinked 204 ? 0 205 : bi->bi_nlink + nlink_bias(bi->bi_mode); 206 } 207 208 static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi, 209 unsigned nlink) 210 { 211 if (nlink) { 212 bi->bi_nlink = nlink - nlink_bias(bi->bi_mode); 213 bi->bi_flags &= ~BCH_INODE_unlinked; 214 } else { 215 bi->bi_nlink = 0; 216 bi->bi_flags |= BCH_INODE_unlinked; 217 } 218 } 219 220 int bch2_inode_nlink_inc(struct bch_inode_unpacked *); 221 void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *); 222 223 struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *); 224 void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *, 225 struct bch_inode_unpacked *); 226 int bch2_inum_opts_get(struct btree_trans*, subvol_inum, struct bch_io_opts *); 227 228 int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32); 229 int bch2_delete_dead_inodes(struct bch_fs *); 230 231 #endif /* _BCACHEFS_INODE_H */ 232