fs/bcachefs/inode.h

   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 */