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_NOUNLOCK,
  19         __BTREE_INSERT_NOFAIL,
  20         __BTREE_INSERT_NOCHECK_RW,
  21         __BTREE_INSERT_LAZY_RW,
  22         __BTREE_INSERT_USE_RESERVE,
  23         __BTREE_INSERT_JOURNAL_REPLAY,
  24         __BTREE_INSERT_JOURNAL_RESERVED,
  25         __BTREE_INSERT_JOURNAL_RECLAIM,
  26         __BTREE_INSERT_NOWAIT,
  27         __BTREE_INSERT_GC_LOCK_HELD,
  28         __BCH_HASH_SET_MUST_CREATE,
  29         __BCH_HASH_SET_MUST_REPLACE,
  30 };
  31
  32 /*
  33  * Don't drop locks _after_ successfully updating btree:
  34  */
  35 #define BTREE_INSERT_NOUNLOCK           (1 << __BTREE_INSERT_NOUNLOCK)
  36
  37 /* Don't check for -ENOSPC: */
  38 #define BTREE_INSERT_NOFAIL             (1 << __BTREE_INSERT_NOFAIL)
  39
  40 #define BTREE_INSERT_NOCHECK_RW         (1 << __BTREE_INSERT_NOCHECK_RW)
  41 #define BTREE_INSERT_LAZY_RW            (1 << __BTREE_INSERT_LAZY_RW)
  42
  43 /* for copygc, or when merging btree nodes */
  44 #define BTREE_INSERT_USE_RESERVE        (1 << __BTREE_INSERT_USE_RESERVE)
  45
  46 /* Insert is for journal replay - don't get journal reservations: */
  47 #define BTREE_INSERT_JOURNAL_REPLAY     (1 << __BTREE_INSERT_JOURNAL_REPLAY)
  48
  49 /* Indicates that we have pre-reserved space in the journal: */
  50 #define BTREE_INSERT_JOURNAL_RESERVED   (1 << __BTREE_INSERT_JOURNAL_RESERVED)
  51
  52 /* Insert is being called from journal reclaim path: */
  53 #define BTREE_INSERT_JOURNAL_RECLAIM (1 << __BTREE_INSERT_JOURNAL_RECLAIM)
  54
  55 /* Don't block on allocation failure (for new btree nodes: */
  56 #define BTREE_INSERT_NOWAIT             (1 << __BTREE_INSERT_NOWAIT)
  57 #define BTREE_INSERT_GC_LOCK_HELD       (1 << __BTREE_INSERT_GC_LOCK_HELD)
  58
  59 #define BCH_HASH_SET_MUST_CREATE        (1 << __BCH_HASH_SET_MUST_CREATE)
  60 #define BCH_HASH_SET_MUST_REPLACE       (1 << __BCH_HASH_SET_MUST_REPLACE)
  61
  62 int bch2_btree_delete_at(struct btree_trans *, struct btree_iter *, unsigned);
  63
  64 int __bch2_btree_insert(struct btree_trans *, enum btree_id, struct bkey_i *);
  65 int bch2_btree_insert(struct bch_fs *, enum btree_id, struct bkey_i *,
  66                      struct disk_reservation *, u64 *, int flags);
  67
  68 int bch2_btree_delete_range_trans(struct btree_trans *, enum btree_id,
  69                                   struct bpos, struct bpos, u64 *);
  70 int bch2_btree_delete_range(struct bch_fs *, enum btree_id,
  71                             struct bpos, struct bpos, u64 *);
  72
  73 int bch2_btree_node_rewrite(struct btree_trans *, struct btree_iter *,
  74                             __le64, unsigned);
  75 void bch2_btree_node_rewrite_async(struct bch_fs *, struct btree *);
  76 int bch2_btree_node_update_key(struct btree_trans *, struct btree_iter *,
  77                                struct btree *, struct bkey_i *);
  78
  79 int bch2_trans_update(struct btree_trans *, struct btree_iter *,
  80                       struct bkey_i *, enum btree_update_flags);
  81 void bch2_trans_commit_hook(struct btree_trans *,
  82                             struct btree_trans_commit_hook *);
  83 int __bch2_trans_commit(struct btree_trans *);
  84
  85 /**
  86  * bch2_trans_commit - insert keys at given iterator positions
  87  *
  88  * This is main entry point for btree updates.
  89  *
  90  * Return values:
  91  * -EINTR: locking changed, this function should be called again.
  92  * -EROFS: filesystem read only
  93  * -EIO: journal or btree node IO error
  94  */
  95 static inline int bch2_trans_commit(struct btree_trans *trans,
  96                                     struct disk_reservation *disk_res,
  97                                     u64 *journal_seq,
  98                                     unsigned flags)
  99 {
 100         trans->disk_res         = disk_res;
 101         trans->journal_seq      = journal_seq;
 102         trans->flags            = flags;
 103
 104         return __bch2_trans_commit(trans);
 105 }
 106
 107 #define lockrestart_do(_trans, _do)                                     \
 108 ({                                                                      \
 109         int _ret;                                                       \
 110                                                                         \
 111         while (1) {                                                     \
 112                 _ret = (_do);                                           \
 113                 if (_ret != -EINTR)                                     \
 114                         break;                                          \
 115                 bch2_trans_reset(_trans, 0);                            \
 116         }                                                               \
 117                                                                         \
 118         _ret;                                                           \
 119 })
 120
 121 #define __bch2_trans_do(_trans, _disk_res, _journal_seq, _flags, _do)   \
 122         lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
 123                                         (_journal_seq), (_flags)))
 124
 125 #define bch2_trans_do(_c, _disk_res, _journal_seq, _flags, _do)         \
 126 ({                                                                      \
 127         struct btree_trans trans;                                       \
 128         int _ret, _ret2;                                                \
 129                                                                         \
 130         bch2_trans_init(&trans, (_c), 0, 0);                            \
 131         _ret = __bch2_trans_do(&trans, _disk_res, _journal_seq, _flags, \
 132                                _do);                                    \
 133         _ret2 = bch2_trans_exit(&trans);                                \
 134                                                                         \
 135         _ret ?: _ret2;                                                  \
 136 })
 137
 138 #define trans_for_each_update(_trans, _i)                               \
 139         for ((_i) = (_trans)->updates;                                  \
 140              (_i) < (_trans)->updates + (_trans)->nr_updates;           \
 141              (_i)++)
 142
 143 #endif /* _BCACHEFS_BTREE_UPDATE_H */