git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/bkey_methods.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_BKEY_METHODS_H
   3 #define _BCACHEFS_BKEY_METHODS_H
   4
   5 #include "bkey.h"
   6
   7 struct bch_fs;
   8 struct btree;
   9 struct btree_trans;
  10 struct bkey;
  11 enum btree_node_type;
  12
  13 extern const char * const bch2_bkey_types[];
  14 extern const struct bkey_ops bch2_bkey_null_ops;
  15
  16 enum bkey_invalid_flags {
  17         BKEY_INVALID_WRITE              = (1U << 0),
  18         BKEY_INVALID_COMMIT             = (1U << 1),
  19         BKEY_INVALID_JOURNAL            = (1U << 2),
  20 };
  21
  22 /*
  23  * key_invalid: checks validity of @k, returns 0 if good or -EINVAL if bad. If
  24  * invalid, entire key will be deleted.
  25  *
  26  * When invalid, error string is returned via @err. @rw indicates whether key is
  27  * being read or written; more aggressive checks can be enabled when rw == WRITE.
  28  */
  29 struct bkey_ops {
  30         int             (*key_invalid)(const struct bch_fs *c, struct bkey_s_c k,
  31                                        enum bkey_invalid_flags flags, struct printbuf *err);
  32         void            (*val_to_text)(struct printbuf *, struct bch_fs *,
  33                                        struct bkey_s_c);
  34         void            (*swab)(struct bkey_s);
  35         bool            (*key_normalize)(struct bch_fs *, struct bkey_s);
  36         bool            (*key_merge)(struct bch_fs *, struct bkey_s, struct bkey_s_c);
  37         int             (*trans_trigger)(struct btree_trans *, enum btree_id, unsigned,
  38                                          struct bkey_s_c, struct bkey_i *, unsigned);
  39         int             (*atomic_trigger)(struct btree_trans *, enum btree_id, unsigned,
  40                                           struct bkey_s_c, struct bkey_s_c, unsigned);
  41         void            (*compat)(enum btree_id id, unsigned version,
  42                                   unsigned big_endian, int write,
  43                                   struct bkey_s);
  44
  45         /* Size of value type when first created: */
  46         unsigned        min_val_size;
  47 };
  48
  49 extern const struct bkey_ops bch2_bkey_ops[];
  50
  51 static inline const struct bkey_ops *bch2_bkey_type_ops(enum bch_bkey_type type)
  52 {
  53         return likely(type < KEY_TYPE_MAX)
  54                 ? &bch2_bkey_ops[type]
  55                 : &bch2_bkey_null_ops;
  56 }
  57
  58 int bch2_bkey_val_invalid(struct bch_fs *, struct bkey_s_c, unsigned, struct printbuf *);
  59 int __bch2_bkey_invalid(struct bch_fs *, struct bkey_s_c,
  60                         enum btree_node_type, unsigned, struct printbuf *);
  61 int bch2_bkey_invalid(struct bch_fs *, struct bkey_s_c,
  62                       enum btree_node_type, unsigned, struct printbuf *);
  63 int bch2_bkey_in_btree_node(struct btree *, struct bkey_s_c, struct printbuf *);
  64
  65 void bch2_bpos_to_text(struct printbuf *, struct bpos);
  66 void bch2_bkey_to_text(struct printbuf *, const struct bkey *);
  67 void bch2_val_to_text(struct printbuf *, struct bch_fs *,
  68                       struct bkey_s_c);
  69 void bch2_bkey_val_to_text(struct printbuf *, struct bch_fs *,
  70                            struct bkey_s_c);
  71
  72 void bch2_bkey_swab_val(struct bkey_s);
  73
  74 bool bch2_bkey_normalize(struct bch_fs *, struct bkey_s);
  75
  76 static inline bool bch2_bkey_maybe_mergable(const struct bkey *l, const struct bkey *r)
  77 {
  78         return l->type == r->type &&
  79                 !bversion_cmp(l->version, r->version) &&
  80                 bpos_eq(l->p, bkey_start_pos(r));
  81 }
  82
  83 bool bch2_bkey_merge(struct bch_fs *, struct bkey_s, struct bkey_s_c);
  84
  85 static inline int bch2_mark_key(struct btree_trans *trans,
  86                 enum btree_id btree, unsigned level,
  87                 struct bkey_s_c old, struct bkey_s_c new,
  88                 unsigned flags)
  89 {
  90         const struct bkey_ops *ops = bch2_bkey_type_ops(old.k->type ?: new.k->type);
  91
  92         return ops->atomic_trigger
  93                 ? ops->atomic_trigger(trans, btree, level, old, new, flags)
  94                 : 0;
  95 }
  96
  97 enum btree_update_flags {
  98         __BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE = __BTREE_ITER_FLAGS_END,
  99         __BTREE_UPDATE_NOJOURNAL,
 100         __BTREE_UPDATE_PREJOURNAL,
 101         __BTREE_UPDATE_KEY_CACHE_RECLAIM,
 102
 103         __BTREE_TRIGGER_NORUN,          /* Don't run triggers at all */
 104
 105         __BTREE_TRIGGER_INSERT,
 106         __BTREE_TRIGGER_OVERWRITE,
 107
 108         __BTREE_TRIGGER_GC,
 109         __BTREE_TRIGGER_BUCKET_INVALIDATE,
 110         __BTREE_TRIGGER_NOATOMIC,
 111 };
 112
 113 #define BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE (1U << __BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE)
 114 #define BTREE_UPDATE_NOJOURNAL          (1U << __BTREE_UPDATE_NOJOURNAL)
 115 #define BTREE_UPDATE_PREJOURNAL         (1U << __BTREE_UPDATE_PREJOURNAL)
 116 #define BTREE_UPDATE_KEY_CACHE_RECLAIM  (1U << __BTREE_UPDATE_KEY_CACHE_RECLAIM)
 117
 118 #define BTREE_TRIGGER_NORUN             (1U << __BTREE_TRIGGER_NORUN)
 119
 120 #define BTREE_TRIGGER_INSERT            (1U << __BTREE_TRIGGER_INSERT)
 121 #define BTREE_TRIGGER_OVERWRITE         (1U << __BTREE_TRIGGER_OVERWRITE)
 122
 123 #define BTREE_TRIGGER_GC                (1U << __BTREE_TRIGGER_GC)
 124 #define BTREE_TRIGGER_BUCKET_INVALIDATE (1U << __BTREE_TRIGGER_BUCKET_INVALIDATE)
 125 #define BTREE_TRIGGER_NOATOMIC          (1U << __BTREE_TRIGGER_NOATOMIC)
 126
 127 #define BTREE_TRIGGER_WANTS_OLD_AND_NEW         \
 128         ((1U << KEY_TYPE_alloc)|                \
 129          (1U << KEY_TYPE_alloc_v2)|             \
 130          (1U << KEY_TYPE_alloc_v3)|             \
 131          (1U << KEY_TYPE_alloc_v4)|             \
 132          (1U << KEY_TYPE_stripe)|               \
 133          (1U << KEY_TYPE_inode)|                \
 134          (1U << KEY_TYPE_inode_v2)|             \
 135          (1U << KEY_TYPE_snapshot))
 136
 137 static inline int bch2_trans_mark_key(struct btree_trans *trans,
 138                                       enum btree_id btree_id, unsigned level,
 139                                       struct bkey_s_c old, struct bkey_i *new,
 140                                       unsigned flags)
 141 {
 142         const struct bkey_ops *ops = bch2_bkey_type_ops(old.k->type ?: new->k.type);
 143
 144         return ops->trans_trigger
 145                 ? ops->trans_trigger(trans, btree_id, level, old, new, flags)
 146                 : 0;
 147 }
 148
 149 static inline int bch2_trans_mark_old(struct btree_trans *trans,
 150                                       enum btree_id btree_id, unsigned level,
 151                                       struct bkey_s_c old, unsigned flags)
 152 {
 153         struct bkey_i deleted;
 154
 155         bkey_init(&deleted.k);
 156         deleted.k.p = old.k->p;
 157
 158         return bch2_trans_mark_key(trans, btree_id, level, old, &deleted,
 159                                    BTREE_TRIGGER_OVERWRITE|flags);
 160 }
 161
 162 static inline int bch2_trans_mark_new(struct btree_trans *trans,
 163                                       enum btree_id btree_id, unsigned level,
 164                                       struct bkey_i *new, unsigned flags)
 165 {
 166         struct bkey_i deleted;
 167
 168         bkey_init(&deleted.k);
 169         deleted.k.p = new->k.p;
 170
 171         return bch2_trans_mark_key(trans, btree_id, level, bkey_i_to_s_c(&deleted), new,
 172                                    BTREE_TRIGGER_INSERT|flags);
 173 }
 174
 175 void bch2_bkey_renumber(enum btree_node_type, struct bkey_packed *, int);
 176
 177 void __bch2_bkey_compat(unsigned, enum btree_id, unsigned, unsigned,
 178                         int, struct bkey_format *, struct bkey_packed *);
 179
 180 static inline void bch2_bkey_compat(unsigned level, enum btree_id btree_id,
 181                                unsigned version, unsigned big_endian,
 182                                int write,
 183                                struct bkey_format *f,
 184                                struct bkey_packed *k)
 185 {
 186         if (version < bcachefs_metadata_version_current ||
 187             big_endian != CPU_BIG_ENDIAN)
 188                 __bch2_bkey_compat(level, btree_id, version,
 189                                    big_endian, write, f, k);
 190
 191 }
 192
 193 #endif /* _BCACHEFS_BKEY_METHODS_H */