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_prep_for_write(struct btree_trans *,
  12                                     struct btree_path *, struct btree *);
  13 bool bch2_btree_bset_insert_key(struct btree_trans *, struct btree_path *,
  14                                 struct btree *, struct btree_node_iter *,
  15                                 struct bkey_i *);
  16 void bch2_btree_add_journal_pin(struct bch_fs *, struct btree *, u64);
  17
  18 void bch2_btree_insert_key_leaf(struct btree_trans *, struct btree_path *,
  19                                 struct bkey_i *, u64);
  20
  21 enum btree_insert_flags {
  22         /* First two bits for journal watermark: */
  23         __BTREE_INSERT_NOFAIL = 2,
  24         __BTREE_INSERT_NOCHECK_RW,
  25         __BTREE_INSERT_LAZY_RW,
  26         __BTREE_INSERT_USE_RESERVE,
  27         __BTREE_INSERT_JOURNAL_REPLAY,
  28         __BTREE_INSERT_JOURNAL_RECLAIM,
  29         __BTREE_INSERT_NOWAIT,
  30         __BTREE_INSERT_GC_LOCK_HELD,
  31         __BCH_HASH_SET_MUST_CREATE,
  32         __BCH_HASH_SET_MUST_REPLACE,
  33 };
  34
  35 /* Don't check for -ENOSPC: */
  36 #define BTREE_INSERT_NOFAIL             (1 << __BTREE_INSERT_NOFAIL)
  37
  38 #define BTREE_INSERT_NOCHECK_RW         (1 << __BTREE_INSERT_NOCHECK_RW)
  39 #define BTREE_INSERT_LAZY_RW            (1 << __BTREE_INSERT_LAZY_RW)
  40
  41 /* for copygc, or when merging btree nodes */
  42 #define BTREE_INSERT_USE_RESERVE        (1 << __BTREE_INSERT_USE_RESERVE)
  43
  44 /* Insert is for journal replay - don't get journal reservations: */
  45 #define BTREE_INSERT_JOURNAL_REPLAY     (1 << __BTREE_INSERT_JOURNAL_REPLAY)
  46
  47 /* Insert is being called from journal reclaim path: */
  48 #define BTREE_INSERT_JOURNAL_RECLAIM (1 << __BTREE_INSERT_JOURNAL_RECLAIM)
  49
  50 /* Don't block on allocation failure (for new btree nodes: */
  51 #define BTREE_INSERT_NOWAIT             (1 << __BTREE_INSERT_NOWAIT)
  52 #define BTREE_INSERT_GC_LOCK_HELD       (1 << __BTREE_INSERT_GC_LOCK_HELD)
  53
  54 #define BCH_HASH_SET_MUST_CREATE        (1 << __BCH_HASH_SET_MUST_CREATE)
  55 #define BCH_HASH_SET_MUST_REPLACE       (1 << __BCH_HASH_SET_MUST_REPLACE)
  56
  57 int bch2_btree_delete_extent_at(struct btree_trans *, struct btree_iter *,
  58                                 unsigned, unsigned);
  59 int bch2_btree_delete_at(struct btree_trans *, struct btree_iter *, unsigned);
  60
  61 int __bch2_btree_insert(struct btree_trans *, enum btree_id, struct bkey_i *,
  62                         enum btree_update_flags);
  63 int bch2_btree_insert(struct bch_fs *, enum btree_id, struct bkey_i *,
  64                      struct disk_reservation *, u64 *, int flags);
  65
  66 int bch2_btree_delete_range_trans(struct btree_trans *, enum btree_id,
  67                                   struct bpos, struct bpos, unsigned, u64 *);
  68 int bch2_btree_delete_range(struct bch_fs *, enum btree_id,
  69                             struct bpos, struct bpos, unsigned, u64 *);
  70
  71 int bch2_btree_node_rewrite(struct btree_trans *, struct btree_iter *,
  72                             struct btree *, unsigned);
  73 void bch2_btree_node_rewrite_async(struct bch_fs *, struct btree *);
  74 int bch2_btree_node_update_key(struct btree_trans *, struct btree_iter *,
  75                                struct btree *, struct bkey_i *, bool);
  76 int bch2_btree_node_update_key_get_iter(struct btree_trans *,
  77                                 struct btree *, struct bkey_i *, bool);
  78
  79 int bch2_trans_update_extent(struct btree_trans *, struct btree_iter *,
  80                              struct bkey_i *, enum btree_update_flags);
  81
  82 int __must_check bch2_trans_update(struct btree_trans *, struct btree_iter *,
  83                                    struct bkey_i *, enum btree_update_flags);
  84 int __must_check bch2_trans_update_buffered(struct btree_trans *,
  85                                             enum btree_id, struct bkey_i *);
  86
  87 void bch2_trans_commit_hook(struct btree_trans *,
  88                             struct btree_trans_commit_hook *);
  89 int __bch2_trans_commit(struct btree_trans *, unsigned);
  90
  91 int bch2_trans_log_msg(struct btree_trans *, const char *, ...);
  92 int bch2_fs_log_msg(struct bch_fs *, const char *, ...);
  93
  94 /**
  95  * bch2_trans_commit - insert keys at given iterator positions
  96  *
  97  * This is main entry point for btree updates.
  98  *
  99  * Return values:
 100  * -EROFS: filesystem read only
 101  * -EIO: journal or btree node IO error
 102  */
 103 static inline int bch2_trans_commit(struct btree_trans *trans,
 104                                     struct disk_reservation *disk_res,
 105                                     u64 *journal_seq,
 106                                     unsigned flags)
 107 {
 108         trans->disk_res         = disk_res;
 109         trans->journal_seq      = journal_seq;
 110
 111         return __bch2_trans_commit(trans, flags);
 112 }
 113
 114 #define commit_do(_trans, _disk_res, _journal_seq, _flags, _do) \
 115         lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
 116                                         (_journal_seq), (_flags)))
 117
 118 #define nested_commit_do(_trans, _disk_res, _journal_seq, _flags, _do)  \
 119         nested_lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
 120                                         (_journal_seq), (_flags)))
 121
 122 #define bch2_trans_do(_c, _disk_res, _journal_seq, _flags, _do)         \
 123 ({                                                                      \
 124         struct btree_trans trans;                                       \
 125         int _ret;                                                       \
 126                                                                         \
 127         bch2_trans_init(&trans, (_c), 0, 0);                            \
 128         _ret = commit_do(&trans, _disk_res, _journal_seq, _flags, _do); \
 129         bch2_trans_exit(&trans);                                        \
 130                                                                         \
 131         _ret;                                                           \
 132 })
 133
 134 #define bch2_trans_run(_c, _do)                                         \
 135 ({                                                                      \
 136         struct btree_trans trans;                                       \
 137         int _ret;                                                       \
 138                                                                         \
 139         bch2_trans_init(&trans, (_c), 0, 0);                            \
 140         _ret = (_do);                                                   \
 141         bch2_trans_exit(&trans);                                        \
 142                                                                         \
 143         _ret;                                                           \
 144 })
 145
 146 #define trans_for_each_update(_trans, _i)                               \
 147         for ((_i) = (_trans)->updates;                                  \
 148              (_i) < (_trans)->updates + (_trans)->nr_updates;           \
 149              (_i)++)
 150
 151 #define trans_for_each_wb_update(_trans, _i)                            \
 152         for ((_i) = (_trans)->wb_updates;                               \
 153              (_i) < (_trans)->wb_updates + (_trans)->nr_wb_updates;     \
 154              (_i)++)
 155
 156 static inline void bch2_trans_reset_updates(struct btree_trans *trans)
 157 {
 158         struct btree_insert_entry *i;
 159
 160         trans_for_each_update(trans, i)
 161                 bch2_path_put(trans, i->path, true);
 162
 163         trans->extra_journal_res        = 0;
 164         trans->nr_updates               = 0;
 165         trans->nr_wb_updates            = 0;
 166         trans->wb_updates               = NULL;
 167         trans->hooks                    = NULL;
 168         trans->extra_journal_entries.nr = 0;
 169
 170         if (trans->fs_usage_deltas) {
 171                 trans->fs_usage_deltas->used = 0;
 172                 memset((void *) trans->fs_usage_deltas +
 173                        offsetof(struct replicas_delta_list, memset_start), 0,
 174                        (void *) &trans->fs_usage_deltas->memset_end -
 175                        (void *) &trans->fs_usage_deltas->memset_start);
 176         }
 177 }
 178
 179 #endif /* _BCACHEFS_BTREE_UPDATE_H */