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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_BTREE_UPDATE_H
   3 #define _BCACHEFS_BTREE_UPDATE_H
   4
   5 #include "btree_iter.h"
   6 #include "journal.h"
   7
   8 struct bch_fs;
   9 struct btree;
  10
  11 void bch2_btree_node_lock_for_insert(struct btree_trans *, struct btree_iter *,
  12                                      struct btree *);
  13 bool bch2_btree_bset_insert_key(struct btree_iter *, struct btree *,
  14                                 struct btree_node_iter *, struct bkey_i *);
  15 void bch2_btree_add_journal_pin(struct bch_fs *, struct btree *, u64);
  16
  17 enum btree_insert_flags {
  18         __BTREE_INSERT_NOFAIL,
  19         __BTREE_INSERT_NOCHECK_RW,
  20         __BTREE_INSERT_LAZY_RW,
  21         __BTREE_INSERT_USE_RESERVE,
  22         __BTREE_INSERT_JOURNAL_REPLAY,
  23         __BTREE_INSERT_JOURNAL_RESERVED,
  24         __BTREE_INSERT_JOURNAL_RECLAIM,
  25         __BTREE_INSERT_NOWAIT,
  26         __BTREE_INSERT_GC_LOCK_HELD,
  27         __BCH_HASH_SET_MUST_CREATE,
  28         __BCH_HASH_SET_MUST_REPLACE,
  29 };
  30
  31 /* Don't check for -ENOSPC: */
  32 #define BTREE_INSERT_NOFAIL             (1 << __BTREE_INSERT_NOFAIL)
  33
  34 #define BTREE_INSERT_NOCHECK_RW         (1 << __BTREE_INSERT_NOCHECK_RW)
  35 #define BTREE_INSERT_LAZY_RW            (1 << __BTREE_INSERT_LAZY_RW)
  36
  37 /* for copygc, or when merging btree nodes */
  38 #define BTREE_INSERT_USE_RESERVE        (1 << __BTREE_INSERT_USE_RESERVE)
  39
  40 /* Insert is for journal replay - don't get journal reservations: */
  41 #define BTREE_INSERT_JOURNAL_REPLAY     (1 << __BTREE_INSERT_JOURNAL_REPLAY)
  42
  43 /* Indicates that we have pre-reserved space in the journal: */
  44 #define BTREE_INSERT_JOURNAL_RESERVED   (1 << __BTREE_INSERT_JOURNAL_RESERVED)
  45
  46 /* Insert is being called from journal reclaim path: */
  47 #define BTREE_INSERT_JOURNAL_RECLAIM (1 << __BTREE_INSERT_JOURNAL_RECLAIM)
  48
  49 /* Don't block on allocation failure (for new btree nodes: */
  50 #define BTREE_INSERT_NOWAIT             (1 << __BTREE_INSERT_NOWAIT)
  51 #define BTREE_INSERT_GC_LOCK_HELD       (1 << __BTREE_INSERT_GC_LOCK_HELD)
  52
  53 #define BCH_HASH_SET_MUST_CREATE        (1 << __BCH_HASH_SET_MUST_CREATE)
  54 #define BCH_HASH_SET_MUST_REPLACE       (1 << __BCH_HASH_SET_MUST_REPLACE)
  55
  56 int bch2_btree_delete_at(struct btree_trans *, struct btree_iter *, unsigned);
  57
  58 int __bch2_btree_insert(struct btree_trans *, enum btree_id, struct bkey_i *);
  59 int bch2_btree_insert(struct bch_fs *, enum btree_id, struct bkey_i *,
  60                      struct disk_reservation *, u64 *, int flags);
  61
  62 int bch2_btree_delete_range_trans(struct btree_trans *, enum btree_id,
  63                                   struct bpos, struct bpos, u64 *);
  64 int bch2_btree_delete_range(struct bch_fs *, enum btree_id,
  65                             struct bpos, struct bpos, u64 *);
  66
  67 int bch2_btree_node_rewrite(struct btree_trans *, struct btree_iter *,
  68                             __le64, unsigned);
  69 void bch2_btree_node_rewrite_async(struct bch_fs *, struct btree *);
  70 int bch2_btree_node_update_key(struct btree_trans *, struct btree_iter *,
  71                                struct btree *, struct bkey_i *, bool);
  72 int bch2_btree_node_update_key_get_iter(struct btree_trans *,
  73                                 struct btree *, struct bkey_i *, bool);
  74
  75 int bch2_trans_update(struct btree_trans *, struct btree_iter *,
  76                       struct bkey_i *, enum btree_update_flags);
  77 void bch2_trans_commit_hook(struct btree_trans *,
  78                             struct btree_trans_commit_hook *);
  79 int __bch2_trans_commit(struct btree_trans *);
  80
  81 /**
  82  * bch2_trans_commit - insert keys at given iterator positions
  83  *
  84  * This is main entry point for btree updates.
  85  *
  86  * Return values:
  87  * -EINTR: locking changed, this function should be called again.
  88  * -EROFS: filesystem read only
  89  * -EIO: journal or btree node IO error
  90  */
  91 static inline int bch2_trans_commit(struct btree_trans *trans,
  92                                     struct disk_reservation *disk_res,
  93                                     u64 *journal_seq,
  94                                     unsigned flags)
  95 {
  96         trans->disk_res         = disk_res;
  97         trans->journal_seq      = journal_seq;
  98         trans->flags            = flags;
  99
 100         return __bch2_trans_commit(trans);
 101 }
 102
 103 #define lockrestart_do(_trans, _do)                                     \
 104 ({                                                                      \
 105         int _ret;                                                       \
 106                                                                         \
 107         do {                                                            \
 108                 bch2_trans_begin(_trans);                               \
 109                 _ret = (_do);                                           \
 110         } while (_ret == -EINTR);                                       \
 111                                                                         \
 112         _ret;                                                           \
 113 })
 114
 115 #define __bch2_trans_do(_trans, _disk_res, _journal_seq, _flags, _do)   \
 116         lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
 117                                         (_journal_seq), (_flags)))
 118
 119 #define bch2_trans_do(_c, _disk_res, _journal_seq, _flags, _do)         \
 120 ({                                                                      \
 121         struct btree_trans trans;                                       \
 122         int _ret, _ret2;                                                \
 123                                                                         \
 124         bch2_trans_init(&trans, (_c), 0, 0);                            \
 125         _ret = __bch2_trans_do(&trans, _disk_res, _journal_seq, _flags, \
 126                                _do);                                    \
 127         _ret2 = bch2_trans_exit(&trans);                                \
 128                                                                         \
 129         _ret ?: _ret2;                                                  \
 130 })
 131
 132 #define trans_for_each_update(_trans, _i)                               \
 133         for ((_i) = (_trans)->updates;                                  \
 134              (_i) < (_trans)->updates + (_trans)->nr_updates;           \
 135              (_i)++)
 136
 137 #endif /* _BCACHEFS_BTREE_UPDATE_H */