362 lines
12 KiB
C
362 lines
12 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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void bch2_btree_node_prep_for_write(struct btree_trans *,
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struct btree_path *, struct btree *);
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bool bch2_btree_bset_insert_key(struct btree_trans *, struct btree_path *,
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struct btree *, struct btree_node_iter *,
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struct bkey_i *);
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int bch2_btree_node_flush0(struct journal *, struct journal_entry_pin *, u64);
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int bch2_btree_node_flush1(struct journal *, struct journal_entry_pin *, u64);
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void bch2_btree_add_journal_pin(struct bch_fs *, struct btree *, u64);
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void bch2_btree_insert_key_leaf(struct btree_trans *, struct btree_path *,
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struct bkey_i *, u64);
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#define BCH_TRANS_COMMIT_FLAGS() \
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x(no_enospc, "don't check for enospc") \
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x(no_check_rw, "don't attempt to take a ref on c->writes") \
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x(lazy_rw, "go read-write if we haven't yet - only for use in recovery") \
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x(no_journal_res, "don't take a journal reservation, instead " \
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"pin journal entry referred to by trans->journal_res.seq") \
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x(journal_reclaim, "operation required for journal reclaim; may return error" \
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"instead of deadlocking if BCH_WATERMARK_reclaim not specified")\
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enum __bch_trans_commit_flags {
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/* First bits for bch_watermark: */
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__BCH_TRANS_COMMIT_FLAGS_START = BCH_WATERMARK_BITS,
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#define x(n, ...) __BCH_TRANS_COMMIT_##n,
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BCH_TRANS_COMMIT_FLAGS()
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#undef x
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};
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enum bch_trans_commit_flags {
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#define x(n, ...) BCH_TRANS_COMMIT_##n = BIT(__BCH_TRANS_COMMIT_##n),
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BCH_TRANS_COMMIT_FLAGS()
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#undef x
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};
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int bch2_btree_delete_extent_at(struct btree_trans *, struct btree_iter *,
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unsigned, unsigned);
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int bch2_btree_delete_at(struct btree_trans *, struct btree_iter *, unsigned);
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int bch2_btree_delete(struct btree_trans *, enum btree_id, struct bpos, unsigned);
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int bch2_btree_insert_nonextent(struct btree_trans *, enum btree_id,
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struct bkey_i *, enum btree_update_flags);
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int bch2_btree_insert_trans(struct btree_trans *, enum btree_id, struct bkey_i *,
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enum btree_update_flags);
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int bch2_btree_insert(struct bch_fs *, enum btree_id, struct bkey_i *,
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struct disk_reservation *, int flags);
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int bch2_btree_delete_range_trans(struct btree_trans *, enum btree_id,
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struct bpos, struct bpos, unsigned, u64 *);
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int bch2_btree_delete_range(struct bch_fs *, enum btree_id,
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struct bpos, struct bpos, unsigned, u64 *);
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int bch2_btree_bit_mod(struct btree_trans *, enum btree_id, struct bpos, bool);
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static inline int bch2_btree_delete_at_buffered(struct btree_trans *trans,
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enum btree_id btree, struct bpos pos)
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{
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return bch2_btree_bit_mod(trans, btree, pos, false);
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}
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int __bch2_insert_snapshot_whiteouts(struct btree_trans *, enum btree_id,
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struct bpos, struct bpos);
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/*
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* For use when splitting extents in existing snapshots:
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*
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* If @old_pos is an interior snapshot node, iterate over descendent snapshot
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* nodes: for every descendent snapshot in whiche @old_pos is overwritten and
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* not visible, emit a whiteout at @new_pos.
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*/
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static inline int bch2_insert_snapshot_whiteouts(struct btree_trans *trans,
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enum btree_id btree,
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struct bpos old_pos,
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struct bpos new_pos)
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{
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if (!btree_type_has_snapshots(btree) ||
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bkey_eq(old_pos, new_pos))
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return 0;
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return __bch2_insert_snapshot_whiteouts(trans, btree, old_pos, new_pos);
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}
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int bch2_trans_update_extent_overwrite(struct btree_trans *, struct btree_iter *,
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enum btree_update_flags,
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struct bkey_s_c, struct bkey_s_c);
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int bch2_bkey_get_empty_slot(struct btree_trans *, struct btree_iter *,
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enum btree_id, struct bpos);
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int __must_check bch2_trans_update(struct btree_trans *, struct btree_iter *,
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struct bkey_i *, enum btree_update_flags);
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struct jset_entry *__bch2_trans_jset_entry_alloc(struct btree_trans *, unsigned);
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static inline struct jset_entry *btree_trans_journal_entries_top(struct btree_trans *trans)
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{
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return (void *) ((u64 *) trans->journal_entries + trans->journal_entries_u64s);
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}
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static inline struct jset_entry *
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bch2_trans_jset_entry_alloc(struct btree_trans *trans, unsigned u64s)
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{
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if (!trans->journal_entries ||
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trans->journal_entries_u64s + u64s > trans->journal_entries_size)
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return __bch2_trans_jset_entry_alloc(trans, u64s);
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struct jset_entry *e = btree_trans_journal_entries_top(trans);
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trans->journal_entries_u64s += u64s;
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return e;
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}
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int bch2_btree_insert_clone_trans(struct btree_trans *, enum btree_id, struct bkey_i *);
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static inline int __must_check bch2_trans_update_buffered(struct btree_trans *trans,
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enum btree_id btree,
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struct bkey_i *k)
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{
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if (unlikely(trans->journal_replay_not_finished))
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return bch2_btree_insert_clone_trans(trans, btree, k);
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struct jset_entry *e = bch2_trans_jset_entry_alloc(trans, jset_u64s(k->k.u64s));
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int ret = PTR_ERR_OR_ZERO(e);
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if (ret)
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return ret;
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journal_entry_init(e, BCH_JSET_ENTRY_write_buffer_keys, btree, 0, k->k.u64s);
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bkey_copy(e->start, k);
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return 0;
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}
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void bch2_trans_commit_hook(struct btree_trans *,
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struct btree_trans_commit_hook *);
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int __bch2_trans_commit(struct btree_trans *, unsigned);
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__printf(2, 3) int bch2_fs_log_msg(struct bch_fs *, const char *, ...);
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__printf(2, 3) int bch2_journal_log_msg(struct bch_fs *, const char *, ...);
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/**
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* bch2_trans_commit - insert keys at given iterator positions
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*
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* This is main entry point for btree updates.
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*
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* Return values:
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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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static inline int bch2_trans_commit(struct btree_trans *trans,
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struct disk_reservation *disk_res,
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u64 *journal_seq,
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unsigned flags)
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{
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trans->disk_res = disk_res;
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trans->journal_seq = journal_seq;
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return __bch2_trans_commit(trans, flags);
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}
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#define commit_do(_trans, _disk_res, _journal_seq, _flags, _do) \
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lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
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(_journal_seq), (_flags)))
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#define nested_commit_do(_trans, _disk_res, _journal_seq, _flags, _do) \
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nested_lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
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(_journal_seq), (_flags)))
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#define bch2_trans_run(_c, _do) \
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({ \
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struct btree_trans *trans = bch2_trans_get(_c); \
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int _ret = (_do); \
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bch2_trans_put(trans); \
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_ret; \
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})
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#define bch2_trans_do(_c, _disk_res, _journal_seq, _flags, _do) \
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bch2_trans_run(_c, commit_do(trans, _disk_res, _journal_seq, _flags, _do))
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#define trans_for_each_update(_trans, _i) \
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for (struct btree_insert_entry *_i = (_trans)->updates; \
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(_i) < (_trans)->updates + (_trans)->nr_updates; \
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(_i)++)
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static inline void bch2_trans_reset_updates(struct btree_trans *trans)
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{
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trans_for_each_update(trans, i)
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bch2_path_put(trans, i->path, true);
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trans->nr_updates = 0;
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trans->journal_entries_u64s = 0;
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trans->hooks = NULL;
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trans->extra_disk_res = 0;
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if (trans->fs_usage_deltas) {
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trans->fs_usage_deltas->used = 0;
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memset((void *) trans->fs_usage_deltas +
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offsetof(struct replicas_delta_list, memset_start), 0,
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(void *) &trans->fs_usage_deltas->memset_end -
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(void *) &trans->fs_usage_deltas->memset_start);
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}
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}
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static inline struct bkey_i *__bch2_bkey_make_mut_noupdate(struct btree_trans *trans, struct bkey_s_c k,
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unsigned type, unsigned min_bytes)
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{
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unsigned bytes = max_t(unsigned, min_bytes, bkey_bytes(k.k));
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struct bkey_i *mut;
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if (type && k.k->type != type)
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return ERR_PTR(-ENOENT);
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mut = bch2_trans_kmalloc_nomemzero(trans, bytes);
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if (!IS_ERR(mut)) {
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bkey_reassemble(mut, k);
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if (unlikely(bytes > bkey_bytes(k.k))) {
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memset((void *) mut + bkey_bytes(k.k), 0,
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bytes - bkey_bytes(k.k));
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mut->k.u64s = DIV_ROUND_UP(bytes, sizeof(u64));
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}
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}
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return mut;
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}
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static inline struct bkey_i *bch2_bkey_make_mut_noupdate(struct btree_trans *trans, struct bkey_s_c k)
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{
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return __bch2_bkey_make_mut_noupdate(trans, k, 0, 0);
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}
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#define bch2_bkey_make_mut_noupdate_typed(_trans, _k, _type) \
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bkey_i_to_##_type(__bch2_bkey_make_mut_noupdate(_trans, _k, \
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KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
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static inline struct bkey_i *__bch2_bkey_make_mut(struct btree_trans *trans, struct btree_iter *iter,
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struct bkey_s_c *k, unsigned flags,
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unsigned type, unsigned min_bytes)
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{
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struct bkey_i *mut = __bch2_bkey_make_mut_noupdate(trans, *k, type, min_bytes);
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int ret;
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if (IS_ERR(mut))
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return mut;
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ret = bch2_trans_update(trans, iter, mut, flags);
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if (ret)
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return ERR_PTR(ret);
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*k = bkey_i_to_s_c(mut);
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return mut;
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}
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static inline struct bkey_i *bch2_bkey_make_mut(struct btree_trans *trans, struct btree_iter *iter,
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struct bkey_s_c *k, unsigned flags)
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{
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return __bch2_bkey_make_mut(trans, iter, k, flags, 0, 0);
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}
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#define bch2_bkey_make_mut_typed(_trans, _iter, _k, _flags, _type) \
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bkey_i_to_##_type(__bch2_bkey_make_mut(_trans, _iter, _k, _flags,\
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KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
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static inline struct bkey_i *__bch2_bkey_get_mut_noupdate(struct btree_trans *trans,
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struct btree_iter *iter,
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unsigned btree_id, struct bpos pos,
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unsigned flags, unsigned type, unsigned min_bytes)
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{
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struct bkey_s_c k = __bch2_bkey_get_iter(trans, iter,
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btree_id, pos, flags|BTREE_ITER_INTENT, type);
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struct bkey_i *ret = IS_ERR(k.k)
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? ERR_CAST(k.k)
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: __bch2_bkey_make_mut_noupdate(trans, k, 0, min_bytes);
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if (IS_ERR(ret))
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bch2_trans_iter_exit(trans, iter);
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return ret;
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}
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static inline struct bkey_i *bch2_bkey_get_mut_noupdate(struct btree_trans *trans,
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struct btree_iter *iter,
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unsigned btree_id, struct bpos pos,
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unsigned flags)
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{
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return __bch2_bkey_get_mut_noupdate(trans, iter, btree_id, pos, flags, 0, 0);
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}
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static inline struct bkey_i *__bch2_bkey_get_mut(struct btree_trans *trans,
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struct btree_iter *iter,
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unsigned btree_id, struct bpos pos,
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unsigned flags, unsigned type, unsigned min_bytes)
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{
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struct bkey_i *mut = __bch2_bkey_get_mut_noupdate(trans, iter,
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btree_id, pos, flags|BTREE_ITER_INTENT, type, min_bytes);
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int ret;
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if (IS_ERR(mut))
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return mut;
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ret = bch2_trans_update(trans, iter, mut, flags);
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if (ret) {
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bch2_trans_iter_exit(trans, iter);
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return ERR_PTR(ret);
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}
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return mut;
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}
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static inline struct bkey_i *bch2_bkey_get_mut_minsize(struct btree_trans *trans,
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struct btree_iter *iter,
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unsigned btree_id, struct bpos pos,
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unsigned flags, unsigned min_bytes)
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{
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return __bch2_bkey_get_mut(trans, iter, btree_id, pos, flags, 0, min_bytes);
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}
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static inline struct bkey_i *bch2_bkey_get_mut(struct btree_trans *trans,
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struct btree_iter *iter,
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unsigned btree_id, struct bpos pos,
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unsigned flags)
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{
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return __bch2_bkey_get_mut(trans, iter, btree_id, pos, flags, 0, 0);
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}
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#define bch2_bkey_get_mut_typed(_trans, _iter, _btree_id, _pos, _flags, _type)\
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bkey_i_to_##_type(__bch2_bkey_get_mut(_trans, _iter, \
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_btree_id, _pos, _flags, \
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KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
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static inline struct bkey_i *__bch2_bkey_alloc(struct btree_trans *trans, struct btree_iter *iter,
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unsigned flags, unsigned type, unsigned val_size)
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{
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struct bkey_i *k = bch2_trans_kmalloc(trans, sizeof(*k) + val_size);
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int ret;
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if (IS_ERR(k))
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return k;
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bkey_init(&k->k);
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k->k.p = iter->pos;
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k->k.type = type;
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set_bkey_val_bytes(&k->k, val_size);
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ret = bch2_trans_update(trans, iter, k, flags);
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if (unlikely(ret))
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return ERR_PTR(ret);
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return k;
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}
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#define bch2_bkey_alloc(_trans, _iter, _flags, _type) \
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bkey_i_to_##_type(__bch2_bkey_alloc(_trans, _iter, _flags, \
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KEY_TYPE_##_type, sizeof(struct bch_##_type)))
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#endif /* _BCACHEFS_BTREE_UPDATE_H */
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