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174 lines
5 KiB
C
174 lines
5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_BTREE_UPDATE_H
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#define _BCACHEFS_BTREE_UPDATE_H
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#include "btree_iter.h"
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#include "journal.h"
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struct bch_fs;
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struct btree;
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struct btree_insert;
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void bch2_btree_node_lock_for_insert(struct bch_fs *, struct btree *,
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struct btree_iter *);
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bool bch2_btree_bset_insert_key(struct btree_iter *, struct btree *,
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struct btree_node_iter *, struct bkey_i *);
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void bch2_btree_journal_key(struct btree_insert *trans, struct btree_iter *,
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struct bkey_i *);
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void bch2_deferred_update_free(struct bch_fs *,
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struct deferred_update *);
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struct deferred_update *
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bch2_deferred_update_alloc(struct bch_fs *, enum btree_id, unsigned);
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/* Normal update interface: */
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struct btree_insert {
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struct bch_fs *c;
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struct disk_reservation *disk_res;
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struct journal_res journal_res;
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struct journal_preres journal_preres;
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u64 *journal_seq;
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unsigned flags;
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unsigned short nr;
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struct btree_insert_entry *entries;
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};
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int __bch2_btree_insert_at(struct btree_insert *);
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#define BTREE_INSERT_ENTRY(_iter, _k) \
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((struct btree_insert_entry) { \
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.iter = (_iter), \
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.k = (_k), \
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})
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#define BTREE_INSERT_DEFERRED(_d, _k) \
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((struct btree_insert_entry) { \
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.k = (_k), \
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.d = (_d), \
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.deferred = true, \
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})
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/**
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* bch_btree_insert_at - insert one or more keys at iterator positions
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* @iter: btree iterator
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* @insert_key: key to insert
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* @disk_res: disk reservation
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* @hook: extent insert callback
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*
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* Return values:
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* -EINTR: locking changed, this function should be called again. Only returned
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* if passed BTREE_INSERT_ATOMIC.
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* -EROFS: filesystem read only
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* -EIO: journal or btree node IO error
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*/
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#define bch2_btree_insert_at(_c, _disk_res, _journal_seq, _flags, ...) \
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__bch2_btree_insert_at(&(struct btree_insert) { \
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.c = (_c), \
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.disk_res = (_disk_res), \
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.journal_seq = (_journal_seq), \
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.flags = (_flags), \
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.nr = COUNT_ARGS(__VA_ARGS__), \
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.entries = (struct btree_insert_entry[]) { \
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__VA_ARGS__ \
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}})
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enum {
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__BTREE_INSERT_ATOMIC,
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__BTREE_INSERT_NOUNLOCK,
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__BTREE_INSERT_NOFAIL,
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__BTREE_INSERT_NOCHECK_RW,
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__BTREE_INSERT_USE_RESERVE,
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__BTREE_INSERT_USE_ALLOC_RESERVE,
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__BTREE_INSERT_JOURNAL_REPLAY,
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__BTREE_INSERT_JOURNAL_RESERVED,
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__BTREE_INSERT_NOMARK,
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__BTREE_INSERT_NOWAIT,
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__BTREE_INSERT_GC_LOCK_HELD,
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__BCH_HASH_SET_MUST_CREATE,
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__BCH_HASH_SET_MUST_REPLACE,
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};
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/*
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* Don't drop/retake locks before doing btree update, instead return -EINTR if
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* we had to drop locks for any reason
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*/
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#define BTREE_INSERT_ATOMIC (1 << __BTREE_INSERT_ATOMIC)
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/*
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* Don't drop locks _after_ successfully updating btree:
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*/
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#define BTREE_INSERT_NOUNLOCK (1 << __BTREE_INSERT_NOUNLOCK)
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/* Don't check for -ENOSPC: */
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#define BTREE_INSERT_NOFAIL (1 << __BTREE_INSERT_NOFAIL)
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#define BTREE_INSERT_NOCHECK_RW (1 << __BTREE_INSERT_NOCHECK_RW)
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/* for copygc, or when merging btree nodes */
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#define BTREE_INSERT_USE_RESERVE (1 << __BTREE_INSERT_USE_RESERVE)
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#define BTREE_INSERT_USE_ALLOC_RESERVE (1 << __BTREE_INSERT_USE_ALLOC_RESERVE)
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/* Insert is for journal replay - don't get journal reservations: */
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#define BTREE_INSERT_JOURNAL_REPLAY (1 << __BTREE_INSERT_JOURNAL_REPLAY)
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#define BTREE_INSERT_JOURNAL_RESERVED (1 << __BTREE_INSERT_JOURNAL_RESERVED)
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/* Don't call bch2_mark_key: */
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#define BTREE_INSERT_NOMARK (1 << __BTREE_INSERT_NOMARK)
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/* Don't block on allocation failure (for new btree nodes: */
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#define BTREE_INSERT_NOWAIT (1 << __BTREE_INSERT_NOWAIT)
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#define BTREE_INSERT_GC_LOCK_HELD (1 << __BTREE_INSERT_GC_LOCK_HELD)
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#define BCH_HASH_SET_MUST_CREATE (1 << __BCH_HASH_SET_MUST_CREATE)
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#define BCH_HASH_SET_MUST_REPLACE (1 << __BCH_HASH_SET_MUST_REPLACE)
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int bch2_btree_delete_at(struct btree_iter *, unsigned);
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int bch2_btree_insert(struct bch_fs *, enum btree_id, struct bkey_i *,
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struct disk_reservation *, u64 *, int flags);
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int bch2_btree_delete_range(struct bch_fs *, enum btree_id,
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struct bpos, struct bpos, u64 *);
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int bch2_btree_node_rewrite(struct bch_fs *c, struct btree_iter *,
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__le64, unsigned);
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int bch2_btree_node_update_key(struct bch_fs *, struct btree_iter *,
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struct btree *, struct bkey_i_btree_ptr *);
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/* new transactional interface: */
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static inline void
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bch2_trans_update(struct btree_trans *trans,
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struct btree_insert_entry entry)
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{
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BUG_ON(trans->nr_updates >= trans->nr_iters + 4);
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trans->updates[trans->nr_updates++] = entry;
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}
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int bch2_trans_commit(struct btree_trans *,
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struct disk_reservation *,
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u64 *, unsigned);
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#define bch2_trans_do(_c, _journal_seq, _flags, _do) \
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({ \
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struct btree_trans trans; \
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int _ret; \
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\
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bch2_trans_init(&trans, (_c)); \
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\
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do { \
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bch2_trans_begin(&trans); \
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\
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_ret = (_do) ?: bch2_trans_commit(&trans, NULL, \
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(_journal_seq), (_flags)); \
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} while (_ret == -EINTR); \
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\
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bch2_trans_exit(&trans); \
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_ret; \
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})
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#endif /* _BCACHEFS_BTREE_UPDATE_H */
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