1 // SPDX-License-Identifier: GPL-2.0
4 #include "btree_update.h"
5 #include "btree_update_interior.h"
8 #include "btree_iter.h"
9 #include "btree_key_cache.h"
10 #include "btree_locking.h"
11 #include "btree_write_buffer.h"
16 #include "extent_update.h"
18 #include "journal_reclaim.h"
21 #include "subvolume.h"
24 #include <linux/prefetch.h>
25 #include <linux/sort.h>
26 #include <trace/events/bcachefs.h>
29 * bch2_btree_path_peek_slot() for a cached iterator might return a key in a
32 struct bkey_s_c bch2_btree_path_peek_slot_exact(struct btree_path *path, struct bkey *u)
34 struct bkey_s_c k = bch2_btree_path_peek_slot(path, u);
36 if (k.k && bpos_eq(path->pos, k.k->p))
41 return (struct bkey_s_c) { u, NULL };
44 static void verify_update_old_key(struct btree_trans *trans, struct btree_insert_entry *i)
46 #ifdef CONFIG_BCACHEFS_DEBUG
47 struct bch_fs *c = trans->c;
49 struct bkey_s_c k = bch2_btree_path_peek_slot_exact(i->path, &u);
51 if (unlikely(trans->journal_replay_not_finished)) {
53 bch2_journal_keys_peek_slot(c, i->btree_id, i->level, i->k->k.p);
56 k = bkey_i_to_s_c(j_k);
60 u.needs_whiteout = i->old_k.needs_whiteout;
62 BUG_ON(memcmp(&i->old_k, &u, sizeof(struct bkey)));
63 BUG_ON(i->old_v != k.v);
67 static int __must_check
68 bch2_trans_update_by_path(struct btree_trans *, struct btree_path *,
69 struct bkey_i *, enum btree_update_flags);
71 static inline int btree_insert_entry_cmp(const struct btree_insert_entry *l,
72 const struct btree_insert_entry *r)
74 return cmp_int(l->btree_id, r->btree_id) ?:
75 cmp_int(l->cached, r->cached) ?:
76 -cmp_int(l->level, r->level) ?:
77 bpos_cmp(l->k->k.p, r->k->k.p);
80 static inline struct btree_path_level *insert_l(struct btree_insert_entry *i)
82 return i->path->l + i->level;
85 static inline bool same_leaf_as_prev(struct btree_trans *trans,
86 struct btree_insert_entry *i)
88 return i != trans->updates &&
89 insert_l(&i[0])->b == insert_l(&i[-1])->b;
92 static inline bool same_leaf_as_next(struct btree_trans *trans,
93 struct btree_insert_entry *i)
95 return i + 1 < trans->updates + trans->nr_updates &&
96 insert_l(&i[0])->b == insert_l(&i[1])->b;
99 inline void bch2_btree_node_prep_for_write(struct btree_trans *trans,
100 struct btree_path *path,
103 struct bch_fs *c = trans->c;
105 if (unlikely(btree_node_just_written(b)) &&
106 bch2_btree_post_write_cleanup(c, b))
107 bch2_trans_node_reinit_iter(trans, b);
110 * If the last bset has been written, or if it's gotten too big - start
111 * a new bset to insert into:
113 if (want_new_bset(c, b))
114 bch2_btree_init_next(trans, b);
117 /* Inserting into a given leaf node (last stage of insert): */
119 /* Handle overwrites and do insert, for non extents: */
120 bool bch2_btree_bset_insert_key(struct btree_trans *trans,
121 struct btree_path *path,
123 struct btree_node_iter *node_iter,
124 struct bkey_i *insert)
126 struct bkey_packed *k;
127 unsigned clobber_u64s = 0, new_u64s = 0;
129 EBUG_ON(btree_node_just_written(b));
130 EBUG_ON(bset_written(b, btree_bset_last(b)));
131 EBUG_ON(bkey_deleted(&insert->k) && bkey_val_u64s(&insert->k));
132 EBUG_ON(bpos_lt(insert->k.p, b->data->min_key));
133 EBUG_ON(bpos_gt(insert->k.p, b->data->max_key));
134 EBUG_ON(insert->k.u64s >
135 bch_btree_keys_u64s_remaining(trans->c, b));
137 k = bch2_btree_node_iter_peek_all(node_iter, b);
138 if (k && bkey_cmp_left_packed(b, k, &insert->k.p))
141 /* @k is the key being overwritten/deleted, if any: */
142 EBUG_ON(k && bkey_deleted(k));
144 /* Deleting, but not found? nothing to do: */
145 if (bkey_deleted(&insert->k) && !k)
148 if (bkey_deleted(&insert->k)) {
150 btree_account_key_drop(b, k);
151 k->type = KEY_TYPE_deleted;
153 if (k->needs_whiteout)
154 push_whiteout(trans->c, b, insert->k.p);
155 k->needs_whiteout = false;
157 if (k >= btree_bset_last(b)->start) {
158 clobber_u64s = k->u64s;
159 bch2_bset_delete(b, k, clobber_u64s);
162 bch2_btree_path_fix_key_modified(trans, b, k);
170 btree_account_key_drop(b, k);
171 k->type = KEY_TYPE_deleted;
173 insert->k.needs_whiteout = k->needs_whiteout;
174 k->needs_whiteout = false;
176 if (k >= btree_bset_last(b)->start) {
177 clobber_u64s = k->u64s;
180 bch2_btree_path_fix_key_modified(trans, b, k);
184 k = bch2_btree_node_iter_bset_pos(node_iter, b, bset_tree_last(b));
186 bch2_bset_insert(b, node_iter, k, insert, clobber_u64s);
189 if (clobber_u64s != new_u64s)
190 bch2_btree_node_iter_fix(trans, path, b, node_iter, k,
191 clobber_u64s, new_u64s);
195 static int __btree_node_flush(struct journal *j, struct journal_entry_pin *pin,
198 struct bch_fs *c = container_of(j, struct bch_fs, journal);
199 struct btree_write *w = container_of(pin, struct btree_write, journal);
200 struct btree *b = container_of(w, struct btree, writes[i]);
201 struct btree_trans trans;
202 unsigned long old, new, v;
203 unsigned idx = w - b->writes;
205 bch2_trans_init(&trans, c, 0, 0);
207 btree_node_lock_nopath_nofail(&trans, &b->c, SIX_LOCK_read);
208 v = READ_ONCE(b->flags);
213 if (!(old & (1 << BTREE_NODE_dirty)) ||
214 !!(old & (1 << BTREE_NODE_write_idx)) != idx ||
215 w->journal.seq != seq)
218 new &= ~BTREE_WRITE_TYPE_MASK;
219 new |= BTREE_WRITE_journal_reclaim;
220 new |= 1 << BTREE_NODE_need_write;
221 } while ((v = cmpxchg(&b->flags, old, new)) != old);
223 btree_node_write_if_need(c, b, SIX_LOCK_read);
224 six_unlock_read(&b->c.lock);
226 bch2_trans_exit(&trans);
230 int bch2_btree_node_flush0(struct journal *j, struct journal_entry_pin *pin, u64 seq)
232 return __btree_node_flush(j, pin, 0, seq);
235 int bch2_btree_node_flush1(struct journal *j, struct journal_entry_pin *pin, u64 seq)
237 return __btree_node_flush(j, pin, 1, seq);
240 inline void bch2_btree_add_journal_pin(struct bch_fs *c,
241 struct btree *b, u64 seq)
243 struct btree_write *w = btree_current_write(b);
245 bch2_journal_pin_add(&c->journal, seq, &w->journal,
246 btree_node_write_idx(b) == 0
247 ? bch2_btree_node_flush0
248 : bch2_btree_node_flush1);
252 * btree_insert_key - insert a key one key into a leaf node
254 inline void bch2_btree_insert_key_leaf(struct btree_trans *trans,
255 struct btree_path *path,
256 struct bkey_i *insert,
259 struct bch_fs *c = trans->c;
260 struct btree *b = path_l(path)->b;
261 struct bset_tree *t = bset_tree_last(b);
262 struct bset *i = bset(b, t);
263 int old_u64s = bset_u64s(t);
264 int old_live_u64s = b->nr.live_u64s;
265 int live_u64s_added, u64s_added;
267 if (unlikely(!bch2_btree_bset_insert_key(trans, path, b,
268 &path_l(path)->iter, insert)))
271 i->journal_seq = cpu_to_le64(max(journal_seq, le64_to_cpu(i->journal_seq)));
273 bch2_btree_add_journal_pin(c, b, journal_seq);
275 if (unlikely(!btree_node_dirty(b)))
276 set_btree_node_dirty_acct(c, b);
278 live_u64s_added = (int) b->nr.live_u64s - old_live_u64s;
279 u64s_added = (int) bset_u64s(t) - old_u64s;
281 if (b->sib_u64s[0] != U16_MAX && live_u64s_added < 0)
282 b->sib_u64s[0] = max(0, (int) b->sib_u64s[0] + live_u64s_added);
283 if (b->sib_u64s[1] != U16_MAX && live_u64s_added < 0)
284 b->sib_u64s[1] = max(0, (int) b->sib_u64s[1] + live_u64s_added);
286 if (u64s_added > live_u64s_added &&
287 bch2_maybe_compact_whiteouts(c, b))
288 bch2_trans_node_reinit_iter(trans, b);
291 static void btree_insert_key_leaf(struct btree_trans *trans,
292 struct btree_insert_entry *insert)
294 bch2_btree_insert_key_leaf(trans, insert->path, insert->k, trans->journal_res.seq);
297 /* Cached btree updates: */
299 /* Normal update interface: */
301 static inline void btree_insert_entry_checks(struct btree_trans *trans,
302 struct btree_insert_entry *i)
304 BUG_ON(!bpos_eq(i->k->k.p, i->path->pos));
305 BUG_ON(i->cached != i->path->cached);
306 BUG_ON(i->level != i->path->level);
307 BUG_ON(i->btree_id != i->path->btree_id);
309 !(i->flags & BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) &&
310 test_bit(JOURNAL_REPLAY_DONE, &trans->c->journal.flags) &&
311 i->k->k.p.snapshot &&
312 bch2_snapshot_internal_node(trans->c, i->k->k.p.snapshot));
316 bch2_trans_journal_preres_get_cold(struct btree_trans *trans, unsigned flags,
317 unsigned long trace_ip)
319 struct bch_fs *c = trans->c;
322 bch2_trans_unlock(trans);
324 ret = bch2_journal_preres_get(&c->journal,
325 &trans->journal_preres,
326 trans->journal_preres_u64s,
327 (flags & JOURNAL_WATERMARK_MASK));
331 ret = bch2_trans_relock(trans);
333 trace_and_count(c, trans_restart_journal_preres_get, trans, trace_ip, 0);
340 static __always_inline int bch2_trans_journal_res_get(struct btree_trans *trans,
343 return bch2_journal_res_get(&trans->c->journal, &trans->journal_res,
344 trans->journal_u64s, flags);
347 #define JSET_ENTRY_LOG_U64s 4
349 static noinline void journal_transaction_name(struct btree_trans *trans)
351 struct bch_fs *c = trans->c;
352 struct journal *j = &c->journal;
353 struct jset_entry *entry =
354 bch2_journal_add_entry(j, &trans->journal_res,
355 BCH_JSET_ENTRY_log, 0, 0,
356 JSET_ENTRY_LOG_U64s);
357 struct jset_entry_log *l =
358 container_of(entry, struct jset_entry_log, entry);
360 strncpy(l->d, trans->fn, JSET_ENTRY_LOG_U64s * sizeof(u64));
363 static inline int btree_key_can_insert(struct btree_trans *trans,
364 struct btree *b, unsigned u64s)
366 struct bch_fs *c = trans->c;
368 if (!bch2_btree_node_insert_fits(c, b, u64s))
369 return -BCH_ERR_btree_insert_btree_node_full;
374 static int btree_key_can_insert_cached(struct btree_trans *trans, unsigned flags,
375 struct btree_path *path, unsigned u64s)
377 struct bch_fs *c = trans->c;
378 struct bkey_cached *ck = (void *) path->l[0].b;
379 struct btree_insert_entry *i;
381 struct bkey_i *new_k;
383 EBUG_ON(path->level);
385 if (!test_bit(BKEY_CACHED_DIRTY, &ck->flags) &&
386 bch2_btree_key_cache_must_wait(c) &&
387 !(flags & BTREE_INSERT_JOURNAL_RECLAIM))
388 return -BCH_ERR_btree_insert_need_journal_reclaim;
391 * bch2_varint_decode can read past the end of the buffer by at most 7
392 * bytes (it won't be used):
396 if (u64s <= ck->u64s)
399 new_u64s = roundup_pow_of_two(u64s);
400 new_k = krealloc(ck->k, new_u64s * sizeof(u64), GFP_NOFS);
402 bch_err(c, "error allocating memory for key cache key, btree %s u64s %u",
403 bch2_btree_ids[path->btree_id], new_u64s);
407 trans_for_each_update(trans, i)
408 if (i->old_v == &ck->k->v)
409 i->old_v = &new_k->v;
418 static int run_one_mem_trigger(struct btree_trans *trans,
419 struct btree_insert_entry *i,
422 struct bkey_s_c old = { &i->old_k, i->old_v };
423 struct bkey_i *new = i->k;
426 verify_update_old_key(trans, i);
428 if (unlikely(flags & BTREE_TRIGGER_NORUN))
431 if (!btree_node_type_needs_gc(i->btree_id))
434 if (bch2_bkey_ops[old.k->type].atomic_trigger ==
435 bch2_bkey_ops[i->k->k.type].atomic_trigger &&
436 ((1U << old.k->type) & BTREE_TRIGGER_WANTS_OLD_AND_NEW)) {
437 ret = bch2_mark_key(trans, i->btree_id, i->level,
438 old, bkey_i_to_s_c(new),
439 BTREE_TRIGGER_INSERT|BTREE_TRIGGER_OVERWRITE|flags);
441 struct bkey _deleted = KEY(0, 0, 0);
442 struct bkey_s_c deleted = (struct bkey_s_c) { &_deleted, NULL };
444 _deleted.p = i->path->pos;
446 ret = bch2_mark_key(trans, i->btree_id, i->level,
447 deleted, bkey_i_to_s_c(new),
448 BTREE_TRIGGER_INSERT|flags) ?:
449 bch2_mark_key(trans, i->btree_id, i->level,
451 BTREE_TRIGGER_OVERWRITE|flags);
457 static int run_one_trans_trigger(struct btree_trans *trans, struct btree_insert_entry *i,
461 * Transactional triggers create new btree_insert_entries, so we can't
462 * pass them a pointer to a btree_insert_entry, that memory is going to
465 struct bkey old_k = i->old_k;
466 struct bkey_s_c old = { &old_k, i->old_v };
468 verify_update_old_key(trans, i);
470 if ((i->flags & BTREE_TRIGGER_NORUN) ||
471 !(BTREE_NODE_TYPE_HAS_TRANS_TRIGGERS & (1U << i->bkey_type)))
474 if (!i->insert_trigger_run &&
475 !i->overwrite_trigger_run &&
476 bch2_bkey_ops[old.k->type].trans_trigger ==
477 bch2_bkey_ops[i->k->k.type].trans_trigger &&
478 ((1U << old.k->type) & BTREE_TRIGGER_WANTS_OLD_AND_NEW)) {
479 i->overwrite_trigger_run = true;
480 i->insert_trigger_run = true;
481 return bch2_trans_mark_key(trans, i->btree_id, i->level, old, i->k,
482 BTREE_TRIGGER_INSERT|
483 BTREE_TRIGGER_OVERWRITE|
485 } else if (overwrite && !i->overwrite_trigger_run) {
486 i->overwrite_trigger_run = true;
487 return bch2_trans_mark_old(trans, i->btree_id, i->level, old, i->flags) ?: 1;
488 } else if (!overwrite && !i->insert_trigger_run) {
489 i->insert_trigger_run = true;
490 return bch2_trans_mark_new(trans, i->btree_id, i->level, i->k, i->flags) ?: 1;
496 static int run_btree_triggers(struct btree_trans *trans, enum btree_id btree_id,
497 struct btree_insert_entry *btree_id_start)
499 struct btree_insert_entry *i;
500 bool trans_trigger_run;
503 for (overwrite = 1; overwrite >= 0; --overwrite) {
506 * Running triggers will append more updates to the list of updates as
510 trans_trigger_run = false;
512 for (i = btree_id_start;
513 i < trans->updates + trans->nr_updates && i->btree_id <= btree_id;
515 if (i->btree_id != btree_id)
518 ret = run_one_trans_trigger(trans, i, overwrite);
522 trans_trigger_run = true;
524 } while (trans_trigger_run);
530 static int bch2_trans_commit_run_triggers(struct btree_trans *trans)
532 struct btree_insert_entry *i = NULL, *btree_id_start = trans->updates;
533 unsigned btree_id = 0;
538 * For a given btree, this algorithm runs insert triggers before
539 * overwrite triggers: this is so that when extents are being moved
540 * (e.g. by FALLOCATE_FL_INSERT_RANGE), we don't drop references before
543 for (btree_id = 0; btree_id < BTREE_ID_NR; btree_id++) {
544 if (btree_id == BTREE_ID_alloc)
547 while (btree_id_start < trans->updates + trans->nr_updates &&
548 btree_id_start->btree_id < btree_id)
551 ret = run_btree_triggers(trans, btree_id, btree_id_start);
556 trans_for_each_update(trans, i) {
557 if (i->btree_id > BTREE_ID_alloc)
559 if (i->btree_id == BTREE_ID_alloc) {
560 ret = run_btree_triggers(trans, BTREE_ID_alloc, i);
567 #ifdef CONFIG_BCACHEFS_DEBUG
568 trans_for_each_update(trans, i)
569 BUG_ON(!(i->flags & BTREE_TRIGGER_NORUN) &&
570 (BTREE_NODE_TYPE_HAS_TRANS_TRIGGERS & (1U << i->bkey_type)) &&
571 (!i->insert_trigger_run || !i->overwrite_trigger_run));
576 static noinline int bch2_trans_commit_run_gc_triggers(struct btree_trans *trans)
578 struct bch_fs *c = trans->c;
579 struct btree_insert_entry *i;
582 trans_for_each_update(trans, i) {
584 * XXX: synchronization of cached update triggers with gc
585 * XXX: synchronization of interior node updates with gc
587 BUG_ON(i->cached || i->level);
589 if (gc_visited(c, gc_pos_btree_node(insert_l(i)->b))) {
590 ret = run_one_mem_trigger(trans, i, i->flags|BTREE_TRIGGER_GC);
600 bch2_trans_commit_write_locked(struct btree_trans *trans, unsigned flags,
601 struct btree_insert_entry **stopped_at,
602 unsigned long trace_ip)
604 struct bch_fs *c = trans->c;
605 struct btree_insert_entry *i;
606 struct btree_write_buffered_key *wb;
607 struct btree_trans_commit_hook *h;
609 bool marking = false;
613 trace_and_count(c, trans_restart_fault_inject, trans, trace_ip);
614 return btree_trans_restart_nounlock(trans, BCH_ERR_transaction_restart_fault_inject);
618 * Check if the insert will fit in the leaf node with the write lock
619 * held, otherwise another thread could write the node changing the
620 * amount of space available:
623 prefetch(&trans->c->journal.flags);
627 ret = h->fn(trans, h);
633 trans_for_each_update(trans, i) {
634 /* Multiple inserts might go to same leaf: */
635 if (!same_leaf_as_prev(trans, i))
638 u64s += i->k->k.u64s;
640 ? btree_key_can_insert(trans, insert_l(i)->b, u64s)
641 : btree_key_can_insert_cached(trans, flags, i->path, u64s);
647 if (btree_node_type_needs_gc(i->bkey_type))
651 if (trans->nr_wb_updates &&
652 trans->nr_wb_updates + c->btree_write_buffer.state.nr > c->btree_write_buffer.size)
653 return -BCH_ERR_btree_insert_need_flush_buffer;
656 * Don't get journal reservation until after we know insert will
659 if (likely(!(flags & BTREE_INSERT_JOURNAL_REPLAY))) {
660 ret = bch2_trans_journal_res_get(trans,
661 (flags & JOURNAL_WATERMARK_MASK)|
662 JOURNAL_RES_GET_NONBLOCK);
666 if (unlikely(trans->journal_transaction_names))
667 journal_transaction_name(trans);
669 trans->journal_res.seq = c->journal.replay_journal_seq;
673 * Not allowed to fail after we've gotten our journal reservation - we
677 if (IS_ENABLED(CONFIG_BCACHEFS_DEBUG) &&
678 !(flags & BTREE_INSERT_JOURNAL_REPLAY)) {
679 if (bch2_journal_seq_verify)
680 trans_for_each_update(trans, i)
681 i->k->k.version.lo = trans->journal_res.seq;
682 else if (bch2_inject_invalid_keys)
683 trans_for_each_update(trans, i)
684 i->k->k.version = MAX_VERSION;
687 if (trans->fs_usage_deltas &&
688 bch2_trans_fs_usage_apply(trans, trans->fs_usage_deltas))
689 return -BCH_ERR_btree_insert_need_mark_replicas;
691 if (trans->nr_wb_updates) {
692 EBUG_ON(flags & BTREE_INSERT_JOURNAL_REPLAY);
694 ret = bch2_btree_insert_keys_write_buffer(trans);
696 goto revert_fs_usage;
699 trans_for_each_update(trans, i)
700 if (BTREE_NODE_TYPE_HAS_MEM_TRIGGERS & (1U << i->bkey_type)) {
701 ret = run_one_mem_trigger(trans, i, i->flags);
706 if (unlikely(c->gc_pos.phase)) {
707 ret = bch2_trans_commit_run_gc_triggers(trans);
712 if (unlikely(trans->extra_journal_entries.nr)) {
713 memcpy_u64s_small(journal_res_entry(&c->journal, &trans->journal_res),
714 trans->extra_journal_entries.data,
715 trans->extra_journal_entries.nr);
717 trans->journal_res.offset += trans->extra_journal_entries.nr;
718 trans->journal_res.u64s -= trans->extra_journal_entries.nr;
721 if (likely(!(flags & BTREE_INSERT_JOURNAL_REPLAY))) {
722 struct journal *j = &c->journal;
723 struct jset_entry *entry;
725 trans_for_each_update(trans, i) {
726 if (i->key_cache_already_flushed)
729 if (i->flags & BTREE_UPDATE_NOJOURNAL)
732 verify_update_old_key(trans, i);
734 if (trans->journal_transaction_names) {
735 entry = bch2_journal_add_entry(j, &trans->journal_res,
736 BCH_JSET_ENTRY_overwrite,
737 i->btree_id, i->level,
739 bkey_reassemble(&entry->start[0],
740 (struct bkey_s_c) { &i->old_k, i->old_v });
743 entry = bch2_journal_add_entry(j, &trans->journal_res,
744 BCH_JSET_ENTRY_btree_keys,
745 i->btree_id, i->level,
747 bkey_copy(&entry->start[0], i->k);
750 trans_for_each_wb_update(trans, wb) {
751 entry = bch2_journal_add_entry(j, &trans->journal_res,
752 BCH_JSET_ENTRY_btree_keys,
755 bkey_copy(&entry->start[0], &wb->k);
758 if (trans->journal_seq)
759 *trans->journal_seq = trans->journal_res.seq;
762 trans_for_each_update(trans, i) {
763 i->k->k.needs_whiteout = false;
766 btree_insert_key_leaf(trans, i);
767 else if (!i->key_cache_already_flushed)
768 bch2_btree_insert_key_cached(trans, flags, i);
770 bch2_btree_key_cache_drop(trans, i->path);
771 btree_path_set_dirty(i->path, BTREE_ITER_NEED_TRAVERSE);
779 if (trans->fs_usage_deltas)
780 bch2_trans_fs_usage_revert(trans, trans->fs_usage_deltas);
784 static noinline int trans_lock_write_fail(struct btree_trans *trans, struct btree_insert_entry *i)
786 while (--i >= trans->updates) {
787 if (same_leaf_as_prev(trans, i))
790 bch2_btree_node_unlock_write(trans, i->path, insert_l(i)->b);
793 trace_and_count(trans->c, trans_restart_would_deadlock_write, trans);
794 return btree_trans_restart(trans, BCH_ERR_transaction_restart_would_deadlock_write);
797 static inline int trans_lock_write(struct btree_trans *trans)
799 struct btree_insert_entry *i;
801 trans_for_each_update(trans, i) {
802 if (same_leaf_as_prev(trans, i))
805 if (bch2_btree_node_lock_write(trans, i->path, &insert_l(i)->b->c))
806 return trans_lock_write_fail(trans, i);
809 bch2_btree_node_prep_for_write(trans, i->path, insert_l(i)->b);
815 static noinline void bch2_drop_overwrites_from_journal(struct btree_trans *trans)
817 struct btree_insert_entry *i;
818 struct btree_write_buffered_key *wb;
820 trans_for_each_update(trans, i)
821 bch2_journal_key_overwritten(trans->c, i->btree_id, i->level, i->k->k.p);
823 trans_for_each_wb_update(trans, wb)
824 bch2_journal_key_overwritten(trans->c, wb->btree, 0, wb->k.k.p);
827 #ifdef CONFIG_BCACHEFS_DEBUG
828 static noinline int bch2_trans_commit_bkey_invalid(struct btree_trans *trans, unsigned flags,
829 struct btree_insert_entry *i,
830 struct printbuf *err)
832 struct bch_fs *c = trans->c;
833 int rw = (flags & BTREE_INSERT_JOURNAL_REPLAY) ? READ : WRITE;
836 prt_printf(err, "invalid bkey on insert from %s -> %ps",
837 trans->fn, (void *) i->ip_allocated);
839 printbuf_indent_add(err, 2);
841 bch2_bkey_val_to_text(err, c, bkey_i_to_s_c(i->k));
844 bch2_bkey_invalid(c, bkey_i_to_s_c(i->k),
845 i->bkey_type, rw, err);
846 bch2_print_string_as_lines(KERN_ERR, err->buf);
848 bch2_inconsistent_error(c);
849 bch2_dump_trans_updates(trans);
857 * Get journal reservation, take write locks, and attempt to do btree update(s):
859 static inline int do_bch2_trans_commit(struct btree_trans *trans, unsigned flags,
860 struct btree_insert_entry **stopped_at,
861 unsigned long trace_ip)
863 struct bch_fs *c = trans->c;
864 struct btree_insert_entry *i;
865 int ret, u64s_delta = 0;
867 #ifdef CONFIG_BCACHEFS_DEBUG
868 struct printbuf buf = PRINTBUF;
870 trans_for_each_update(trans, i) {
871 int rw = (flags & BTREE_INSERT_JOURNAL_REPLAY) ? READ : WRITE;
873 if (unlikely(bch2_bkey_invalid(c, bkey_i_to_s_c(i->k),
874 i->bkey_type, rw, &buf)))
875 return bch2_trans_commit_bkey_invalid(trans, flags, i, &buf);
876 btree_insert_entry_checks(trans, i);
881 trans_for_each_update(trans, i) {
885 u64s_delta += !bkey_deleted(&i->k->k) ? i->k->k.u64s : 0;
886 u64s_delta -= i->old_btree_u64s;
888 if (!same_leaf_as_next(trans, i)) {
889 if (u64s_delta <= 0) {
890 ret = bch2_foreground_maybe_merge(trans, i->path,
900 ret = bch2_journal_preres_get(&c->journal,
901 &trans->journal_preres, trans->journal_preres_u64s,
902 (flags & JOURNAL_WATERMARK_MASK)|JOURNAL_RES_GET_NONBLOCK);
903 if (unlikely(ret == -BCH_ERR_journal_preres_get_blocked))
904 ret = bch2_trans_journal_preres_get_cold(trans, flags, trace_ip);
908 ret = trans_lock_write(trans);
912 ret = bch2_trans_commit_write_locked(trans, flags, stopped_at, trace_ip);
914 if (!ret && unlikely(trans->journal_replay_not_finished))
915 bch2_drop_overwrites_from_journal(trans);
917 trans_for_each_update(trans, i)
918 if (!same_leaf_as_prev(trans, i))
919 bch2_btree_node_unlock_write_inlined(trans, i->path,
922 if (!ret && trans->journal_pin)
923 bch2_journal_pin_add(&c->journal, trans->journal_res.seq,
924 trans->journal_pin, NULL);
927 * Drop journal reservation after dropping write locks, since dropping
928 * the journal reservation may kick off a journal write:
930 bch2_journal_res_put(&c->journal, &trans->journal_res);
935 bch2_trans_downgrade(trans);
940 static int journal_reclaim_wait_done(struct bch_fs *c)
942 int ret = bch2_journal_error(&c->journal) ?:
943 !bch2_btree_key_cache_must_wait(c);
946 journal_reclaim_kick(&c->journal);
951 int bch2_trans_commit_error(struct btree_trans *trans, unsigned flags,
952 struct btree_insert_entry *i,
953 int ret, unsigned long trace_ip)
955 struct bch_fs *c = trans->c;
958 case -BCH_ERR_btree_insert_btree_node_full:
959 ret = bch2_btree_split_leaf(trans, i->path, flags);
960 if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
961 trace_and_count(c, trans_restart_btree_node_split, trans, trace_ip, i->path);
963 case -BCH_ERR_btree_insert_need_mark_replicas:
964 bch2_trans_unlock(trans);
966 ret = bch2_replicas_delta_list_mark(c, trans->fs_usage_deltas);
970 ret = bch2_trans_relock(trans);
972 trace_and_count(c, trans_restart_mark_replicas, trans, trace_ip);
974 case -BCH_ERR_journal_res_get_blocked:
975 bch2_trans_unlock(trans);
977 if ((flags & BTREE_INSERT_JOURNAL_RECLAIM) &&
978 !(flags & JOURNAL_WATERMARK_reserved)) {
979 ret = -BCH_ERR_journal_reclaim_would_deadlock;
983 ret = bch2_trans_journal_res_get(trans,
984 (flags & JOURNAL_WATERMARK_MASK)|
985 JOURNAL_RES_GET_CHECK);
989 ret = bch2_trans_relock(trans);
991 trace_and_count(c, trans_restart_journal_res_get, trans, trace_ip);
993 case -BCH_ERR_btree_insert_need_journal_reclaim:
994 bch2_trans_unlock(trans);
996 trace_and_count(c, trans_blocked_journal_reclaim, trans, trace_ip);
998 wait_event_freezable(c->journal.reclaim_wait,
999 (ret = journal_reclaim_wait_done(c)));
1003 ret = bch2_trans_relock(trans);
1005 trace_and_count(c, trans_restart_journal_reclaim, trans, trace_ip);
1007 case -BCH_ERR_btree_insert_need_flush_buffer: {
1008 struct btree_write_buffer *wb = &c->btree_write_buffer;
1012 if (wb->state.nr > wb->size * 3 / 4) {
1013 bch2_trans_reset_updates(trans);
1014 bch2_trans_unlock(trans);
1016 mutex_lock(&wb->flush_lock);
1018 if (wb->state.nr > wb->size * 3 / 4)
1019 ret = __bch2_btree_write_buffer_flush(trans,
1020 flags|BTREE_INSERT_NOCHECK_RW, true);
1022 mutex_unlock(&wb->flush_lock);
1025 trace_and_count(c, trans_restart_write_buffer_flush, trans, _THIS_IP_);
1026 ret = btree_trans_restart(trans, BCH_ERR_transaction_restart_write_buffer_flush);
1036 BUG_ON(bch2_err_matches(ret, BCH_ERR_transaction_restart) != !!trans->restarted);
1038 bch2_fs_inconsistent_on(bch2_err_matches(ret, ENOSPC) &&
1039 !(flags & BTREE_INSERT_NOWAIT) &&
1040 (flags & BTREE_INSERT_NOFAIL), c,
1041 "%s: incorrectly got %s\n", __func__, bch2_err_str(ret));
1047 bch2_trans_commit_get_rw_cold(struct btree_trans *trans, unsigned flags)
1049 struct bch_fs *c = trans->c;
1052 if (likely(!(flags & BTREE_INSERT_LAZY_RW)) ||
1053 test_bit(BCH_FS_STARTED, &c->flags))
1054 return -BCH_ERR_erofs_trans_commit;
1056 bch2_trans_unlock(trans);
1058 ret = bch2_fs_read_write_early(c) ?:
1059 bch2_trans_relock(trans);
1063 bch2_write_ref_get(c, BCH_WRITE_REF_trans);
1068 * This is for updates done in the early part of fsck - btree_gc - before we've
1069 * gone RW. we only add the new key to the list of keys for journal replay to
1073 do_bch2_trans_commit_to_journal_replay(struct btree_trans *trans)
1075 struct bch_fs *c = trans->c;
1076 struct btree_insert_entry *i;
1079 trans_for_each_update(trans, i) {
1080 ret = bch2_journal_key_insert(c, i->btree_id, i->level, i->k);
1088 int __bch2_trans_commit(struct btree_trans *trans, unsigned flags)
1090 struct bch_fs *c = trans->c;
1091 struct btree_insert_entry *i = NULL;
1092 struct btree_write_buffered_key *wb;
1096 if (!trans->nr_updates &&
1097 !trans->nr_wb_updates &&
1098 !trans->extra_journal_entries.nr)
1101 if (flags & BTREE_INSERT_GC_LOCK_HELD)
1102 lockdep_assert_held(&c->gc_lock);
1104 ret = bch2_trans_commit_run_triggers(trans);
1108 if (unlikely(!test_bit(BCH_FS_MAY_GO_RW, &c->flags))) {
1109 ret = do_bch2_trans_commit_to_journal_replay(trans);
1113 if (!(flags & BTREE_INSERT_NOCHECK_RW) &&
1114 unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_trans))) {
1115 ret = bch2_trans_commit_get_rw_cold(trans, flags);
1120 if (c->btree_write_buffer.state.nr > c->btree_write_buffer.size / 2 &&
1121 mutex_trylock(&c->btree_write_buffer.flush_lock)) {
1122 bch2_trans_begin(trans);
1123 bch2_trans_unlock(trans);
1125 ret = __bch2_btree_write_buffer_flush(trans,
1126 flags|BTREE_INSERT_NOCHECK_RW, true);
1128 trace_and_count(c, trans_restart_write_buffer_flush, trans, _THIS_IP_);
1129 ret = btree_trans_restart(trans, BCH_ERR_transaction_restart_write_buffer_flush);
1134 EBUG_ON(test_bit(BCH_FS_CLEAN_SHUTDOWN, &c->flags));
1136 memset(&trans->journal_preres, 0, sizeof(trans->journal_preres));
1138 trans->journal_u64s = trans->extra_journal_entries.nr;
1139 trans->journal_preres_u64s = 0;
1141 trans->journal_transaction_names = READ_ONCE(c->opts.journal_transaction_names);
1143 if (trans->journal_transaction_names)
1144 trans->journal_u64s += jset_u64s(JSET_ENTRY_LOG_U64s);
1146 trans_for_each_update(trans, i) {
1147 EBUG_ON(!i->path->should_be_locked);
1149 ret = bch2_btree_path_upgrade(trans, i->path, i->level + 1);
1153 EBUG_ON(!btree_node_intent_locked(i->path, i->level));
1155 if (i->key_cache_already_flushed)
1158 /* we're going to journal the key being updated: */
1159 u64s = jset_u64s(i->k->k.u64s);
1161 likely(!(flags & BTREE_INSERT_JOURNAL_REPLAY)))
1162 trans->journal_preres_u64s += u64s;
1164 if (i->flags & BTREE_UPDATE_NOJOURNAL)
1167 trans->journal_u64s += u64s;
1169 /* and we're also going to log the overwrite: */
1170 if (trans->journal_transaction_names)
1171 trans->journal_u64s += jset_u64s(i->old_k.u64s);
1174 trans_for_each_wb_update(trans, wb)
1175 trans->journal_u64s += jset_u64s(wb->k.k.u64s);
1177 if (trans->extra_journal_res) {
1178 ret = bch2_disk_reservation_add(c, trans->disk_res,
1179 trans->extra_journal_res,
1180 (flags & BTREE_INSERT_NOFAIL)
1181 ? BCH_DISK_RESERVATION_NOFAIL : 0);
1186 bch2_trans_verify_not_in_restart(trans);
1187 memset(&trans->journal_res, 0, sizeof(trans->journal_res));
1189 ret = do_bch2_trans_commit(trans, flags, &i, _RET_IP_);
1191 /* make sure we didn't drop or screw up locks: */
1192 bch2_trans_verify_locks(trans);
1197 trace_and_count(c, transaction_commit, trans, _RET_IP_);
1199 bch2_journal_preres_put(&c->journal, &trans->journal_preres);
1201 if (likely(!(flags & BTREE_INSERT_NOCHECK_RW)))
1202 bch2_write_ref_put(c, BCH_WRITE_REF_trans);
1204 bch2_trans_reset_updates(trans);
1208 ret = bch2_trans_commit_error(trans, flags, i, ret, _RET_IP_);
1215 static noinline int __check_pos_snapshot_overwritten(struct btree_trans *trans,
1219 struct bch_fs *c = trans->c;
1220 struct btree_iter iter;
1224 bch2_trans_iter_init(trans, &iter, id, pos,
1225 BTREE_ITER_NOT_EXTENTS|
1226 BTREE_ITER_ALL_SNAPSHOTS);
1228 k = bch2_btree_iter_prev(&iter);
1236 if (!bkey_eq(pos, k.k->p))
1239 if (bch2_snapshot_is_ancestor(c, k.k->p.snapshot, pos.snapshot)) {
1244 bch2_trans_iter_exit(trans, &iter);
1249 static inline int check_pos_snapshot_overwritten(struct btree_trans *trans,
1253 if (!btree_type_has_snapshots(id) ||
1254 pos.snapshot == U32_MAX ||
1255 !snapshot_t(trans->c, pos.snapshot)->children[0])
1258 return __check_pos_snapshot_overwritten(trans, id, pos);
1261 static noinline int extent_front_merge(struct btree_trans *trans,
1262 struct btree_iter *iter,
1264 struct bkey_i **insert,
1265 enum btree_update_flags flags)
1267 struct bch_fs *c = trans->c;
1268 struct bkey_i *update;
1271 update = bch2_bkey_make_mut(trans, k);
1272 ret = PTR_ERR_OR_ZERO(update);
1276 if (!bch2_bkey_merge(c, bkey_i_to_s(update), bkey_i_to_s_c(*insert)))
1279 ret = check_pos_snapshot_overwritten(trans, iter->btree_id, k.k->p) ?:
1280 check_pos_snapshot_overwritten(trans, iter->btree_id, (*insert)->k.p);
1286 ret = bch2_btree_delete_at(trans, iter, flags);
1294 static noinline int extent_back_merge(struct btree_trans *trans,
1295 struct btree_iter *iter,
1296 struct bkey_i *insert,
1299 struct bch_fs *c = trans->c;
1302 ret = check_pos_snapshot_overwritten(trans, iter->btree_id, insert->k.p) ?:
1303 check_pos_snapshot_overwritten(trans, iter->btree_id, k.k->p);
1309 bch2_bkey_merge(c, bkey_i_to_s(insert), k);
1314 * When deleting, check if we need to emit a whiteout (because we're overwriting
1315 * something in an ancestor snapshot)
1317 static int need_whiteout_for_snapshot(struct btree_trans *trans,
1318 enum btree_id btree_id, struct bpos pos)
1320 struct btree_iter iter;
1322 u32 snapshot = pos.snapshot;
1325 if (!bch2_snapshot_parent(trans->c, pos.snapshot))
1330 for_each_btree_key_norestart(trans, iter, btree_id, pos,
1331 BTREE_ITER_ALL_SNAPSHOTS|
1332 BTREE_ITER_NOPRESERVE, k, ret) {
1333 if (!bkey_eq(k.k->p, pos))
1336 if (bch2_snapshot_is_ancestor(trans->c, snapshot,
1338 ret = !bkey_whiteout(k.k);
1342 bch2_trans_iter_exit(trans, &iter);
1346 int bch2_trans_update_extent(struct btree_trans *trans,
1347 struct btree_iter *orig_iter,
1348 struct bkey_i *insert,
1349 enum btree_update_flags flags)
1351 struct btree_iter iter;
1352 struct bpos start = bkey_start_pos(&insert->k);
1353 struct bkey_i *update;
1355 enum btree_id btree_id = orig_iter->btree_id;
1356 int ret = 0, compressed_sectors;
1358 bch2_trans_iter_init(trans, &iter, btree_id, start,
1360 BTREE_ITER_WITH_UPDATES|
1361 BTREE_ITER_NOT_EXTENTS);
1362 k = bch2_btree_iter_peek_upto(&iter, POS(insert->k.p.inode, U64_MAX));
1363 if ((ret = bkey_err(k)))
1368 if (bkey_eq(k.k->p, bkey_start_pos(&insert->k))) {
1369 if (bch2_bkey_maybe_mergable(k.k, &insert->k)) {
1370 ret = extent_front_merge(trans, &iter, k, &insert, flags);
1378 while (bkey_gt(insert->k.p, bkey_start_pos(k.k))) {
1379 bool front_split = bkey_lt(bkey_start_pos(k.k), start);
1380 bool back_split = bkey_gt(k.k->p, insert->k.p);
1383 * If we're going to be splitting a compressed extent, note it
1384 * so that __bch2_trans_commit() can increase our disk
1387 if (((front_split && back_split) ||
1388 ((front_split || back_split) && k.k->p.snapshot != insert->k.p.snapshot)) &&
1389 (compressed_sectors = bch2_bkey_sectors_compressed(k)))
1390 trans->extra_journal_res += compressed_sectors;
1393 update = bch2_bkey_make_mut(trans, k);
1394 if ((ret = PTR_ERR_OR_ZERO(update)))
1397 bch2_cut_back(start, update);
1399 ret = bch2_btree_insert_nonextent(trans, btree_id, update,
1400 BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|flags);
1405 if (k.k->p.snapshot != insert->k.p.snapshot &&
1406 (front_split || back_split)) {
1407 update = bch2_bkey_make_mut(trans, k);
1408 if ((ret = PTR_ERR_OR_ZERO(update)))
1411 bch2_cut_front(start, update);
1412 bch2_cut_back(insert->k.p, update);
1414 ret = bch2_btree_insert_nonextent(trans, btree_id, update,
1415 BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|flags);
1420 if (bkey_le(k.k->p, insert->k.p)) {
1421 update = bch2_trans_kmalloc(trans, sizeof(*update));
1422 if ((ret = PTR_ERR_OR_ZERO(update)))
1425 bkey_init(&update->k);
1426 update->k.p = k.k->p;
1427 update->k.p.snapshot = insert->k.p.snapshot;
1429 if (insert->k.p.snapshot != k.k->p.snapshot ||
1430 (btree_type_has_snapshots(btree_id) &&
1431 need_whiteout_for_snapshot(trans, btree_id, update->k.p)))
1432 update->k.type = KEY_TYPE_whiteout;
1434 ret = bch2_btree_insert_nonextent(trans, btree_id, update,
1435 BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|flags);
1441 update = bch2_bkey_make_mut(trans, k);
1442 if ((ret = PTR_ERR_OR_ZERO(update)))
1445 bch2_cut_front(insert->k.p, update);
1447 ret = bch2_trans_update_by_path(trans, iter.path, update,
1448 BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|
1455 bch2_btree_iter_advance(&iter);
1456 k = bch2_btree_iter_peek_upto(&iter, POS(insert->k.p.inode, U64_MAX));
1457 if ((ret = bkey_err(k)))
1463 if (bch2_bkey_maybe_mergable(&insert->k, k.k)) {
1464 ret = extent_back_merge(trans, &iter, insert, k);
1469 if (!bkey_deleted(&insert->k)) {
1471 * Rewinding iterators is expensive: get a new one and the one
1472 * that points to the start of insert will be cloned from:
1474 bch2_trans_iter_exit(trans, &iter);
1475 bch2_trans_iter_init(trans, &iter, btree_id, insert->k.p,
1476 BTREE_ITER_NOT_EXTENTS|
1478 ret = bch2_btree_iter_traverse(&iter) ?:
1479 bch2_trans_update(trans, &iter, insert, flags);
1482 bch2_trans_iter_exit(trans, &iter);
1487 static int __must_check
1488 bch2_trans_update_by_path_trace(struct btree_trans *trans, struct btree_path *path,
1489 struct bkey_i *k, enum btree_update_flags flags,
1492 static noinline int flush_new_cached_update(struct btree_trans *trans,
1493 struct btree_path *path,
1494 struct btree_insert_entry *i,
1495 enum btree_update_flags flags,
1498 struct btree_path *btree_path;
1501 i->key_cache_already_flushed = true;
1502 i->flags |= BTREE_TRIGGER_NORUN;
1504 btree_path = bch2_path_get(trans, path->btree_id, path->pos, 1, 0,
1505 BTREE_ITER_INTENT, _THIS_IP_);
1507 ret = bch2_btree_path_traverse(trans, btree_path, 0);
1511 btree_path_set_should_be_locked(btree_path);
1512 ret = bch2_trans_update_by_path_trace(trans, btree_path, i->k, flags, ip);
1514 bch2_path_put(trans, btree_path, true);
1518 static int __must_check
1519 bch2_trans_update_by_path_trace(struct btree_trans *trans, struct btree_path *path,
1520 struct bkey_i *k, enum btree_update_flags flags,
1523 struct bch_fs *c = trans->c;
1524 struct btree_insert_entry *i, n;
1527 EBUG_ON(!path->should_be_locked);
1528 EBUG_ON(trans->nr_updates >= BTREE_ITER_MAX);
1529 EBUG_ON(!bpos_eq(k->k.p, path->pos));
1531 n = (struct btree_insert_entry) {
1533 .bkey_type = __btree_node_type(path->level, path->btree_id),
1534 .btree_id = path->btree_id,
1535 .level = path->level,
1536 .cached = path->cached,
1542 #ifdef CONFIG_BCACHEFS_DEBUG
1543 trans_for_each_update(trans, i)
1544 BUG_ON(i != trans->updates &&
1545 btree_insert_entry_cmp(i - 1, i) >= 0);
1549 * Pending updates are kept sorted: first, find position of new update,
1550 * then delete/trim any updates the new update overwrites:
1552 trans_for_each_update(trans, i) {
1553 cmp = btree_insert_entry_cmp(&n, i);
1558 if (!cmp && i < trans->updates + trans->nr_updates) {
1559 EBUG_ON(i->insert_trigger_run || i->overwrite_trigger_run);
1561 bch2_path_put(trans, i->path, true);
1563 i->cached = n.cached;
1566 i->ip_allocated = n.ip_allocated;
1568 array_insert_item(trans->updates, trans->nr_updates,
1569 i - trans->updates, n);
1571 i->old_v = bch2_btree_path_peek_slot_exact(path, &i->old_k).v;
1572 i->old_btree_u64s = !bkey_deleted(&i->old_k) ? i->old_k.u64s : 0;
1574 if (unlikely(trans->journal_replay_not_finished)) {
1575 struct bkey_i *j_k =
1576 bch2_journal_keys_peek_slot(c, n.btree_id, n.level, k->k.p);
1585 __btree_path_get(i->path, true);
1588 * If a key is present in the key cache, it must also exist in the
1589 * btree - this is necessary for cache coherency. When iterating over
1590 * a btree that's cached in the key cache, the btree iter code checks
1591 * the key cache - but the key has to exist in the btree for that to
1595 bkey_deleted(&i->old_k) &&
1596 !(flags & BTREE_UPDATE_NO_KEY_CACHE_COHERENCY))
1597 return flush_new_cached_update(trans, path, i, flags, ip);
1602 static inline int __must_check
1603 bch2_trans_update_by_path(struct btree_trans *trans, struct btree_path *path,
1604 struct bkey_i *k, enum btree_update_flags flags)
1606 return bch2_trans_update_by_path_trace(trans, path, k, flags, _RET_IP_);
1609 int __must_check bch2_trans_update(struct btree_trans *trans, struct btree_iter *iter,
1610 struct bkey_i *k, enum btree_update_flags flags)
1612 struct btree_path *path = iter->update_path ?: iter->path;
1613 struct bkey_cached *ck;
1616 if (iter->flags & BTREE_ITER_IS_EXTENTS)
1617 return bch2_trans_update_extent(trans, iter, k, flags);
1619 if (bkey_deleted(&k->k) &&
1620 !(flags & BTREE_UPDATE_KEY_CACHE_RECLAIM) &&
1621 (iter->flags & BTREE_ITER_FILTER_SNAPSHOTS)) {
1622 ret = need_whiteout_for_snapshot(trans, iter->btree_id, k->k.p);
1623 if (unlikely(ret < 0))
1627 k->k.type = KEY_TYPE_whiteout;
1631 * Ensure that updates to cached btrees go to the key cache:
1633 if (!(flags & BTREE_UPDATE_KEY_CACHE_RECLAIM) &&
1636 btree_id_cached(trans->c, path->btree_id)) {
1637 if (!iter->key_cache_path ||
1638 !iter->key_cache_path->should_be_locked ||
1639 !bpos_eq(iter->key_cache_path->pos, k->k.p)) {
1640 if (!iter->key_cache_path)
1641 iter->key_cache_path =
1642 bch2_path_get(trans, path->btree_id, path->pos, 1, 0,
1644 BTREE_ITER_CACHED, _THIS_IP_);
1646 iter->key_cache_path =
1647 bch2_btree_path_set_pos(trans, iter->key_cache_path, path->pos,
1648 iter->flags & BTREE_ITER_INTENT,
1651 ret = bch2_btree_path_traverse(trans, iter->key_cache_path,
1656 ck = (void *) iter->key_cache_path->l[0].b;
1658 if (test_bit(BKEY_CACHED_DIRTY, &ck->flags)) {
1659 trace_and_count(trans->c, trans_restart_key_cache_raced, trans, _RET_IP_);
1660 return btree_trans_restart(trans, BCH_ERR_transaction_restart_key_cache_raced);
1663 btree_path_set_should_be_locked(iter->key_cache_path);
1666 path = iter->key_cache_path;
1669 return bch2_trans_update_by_path(trans, path, k, flags);
1672 int __must_check bch2_trans_update_buffered(struct btree_trans *trans,
1673 enum btree_id btree,
1676 struct btree_write_buffered_key *i;
1679 EBUG_ON(trans->nr_wb_updates > trans->wb_updates_size);
1680 EBUG_ON(k->k.u64s > BTREE_WRITE_BUFERED_U64s_MAX);
1682 trans_for_each_wb_update(trans, i) {
1683 if (i->btree == btree && bpos_eq(i->k.k.p, k->k.p)) {
1684 bkey_copy(&i->k, k);
1689 if (!trans->wb_updates ||
1690 trans->nr_wb_updates == trans->wb_updates_size) {
1691 struct btree_write_buffered_key *u;
1693 if (trans->nr_wb_updates == trans->wb_updates_size) {
1694 struct btree_transaction_stats *s = btree_trans_stats(trans);
1696 BUG_ON(trans->wb_updates_size > U8_MAX / 2);
1697 trans->wb_updates_size = max(1, trans->wb_updates_size * 2);
1699 s->wb_updates_size = trans->wb_updates_size;
1702 u = bch2_trans_kmalloc_nomemzero(trans,
1703 trans->wb_updates_size *
1704 sizeof(struct btree_write_buffered_key));
1705 ret = PTR_ERR_OR_ZERO(u);
1709 if (trans->nr_wb_updates)
1710 memcpy(u, trans->wb_updates, trans->nr_wb_updates *
1711 sizeof(struct btree_write_buffered_key));
1712 trans->wb_updates = u;
1715 trans->wb_updates[trans->nr_wb_updates] = (struct btree_write_buffered_key) {
1719 bkey_copy(&trans->wb_updates[trans->nr_wb_updates].k, k);
1720 trans->nr_wb_updates++;
1725 void bch2_trans_commit_hook(struct btree_trans *trans,
1726 struct btree_trans_commit_hook *h)
1728 h->next = trans->hooks;
1732 int bch2_btree_insert_nonextent(struct btree_trans *trans,
1733 enum btree_id btree, struct bkey_i *k,
1734 enum btree_update_flags flags)
1736 struct btree_iter iter;
1739 bch2_trans_iter_init(trans, &iter, btree, k->k.p,
1740 BTREE_ITER_NOT_EXTENTS|
1742 ret = bch2_btree_iter_traverse(&iter) ?:
1743 bch2_trans_update(trans, &iter, k, flags);
1744 bch2_trans_iter_exit(trans, &iter);
1748 int __bch2_btree_insert(struct btree_trans *trans, enum btree_id id,
1749 struct bkey_i *k, enum btree_update_flags flags)
1751 struct btree_iter iter;
1754 bch2_trans_iter_init(trans, &iter, id, bkey_start_pos(&k->k),
1757 ret = bch2_btree_iter_traverse(&iter) ?:
1758 bch2_trans_update(trans, &iter, k, flags);
1759 bch2_trans_iter_exit(trans, &iter);
1764 * bch2_btree_insert - insert keys into the extent btree
1765 * @c: pointer to struct bch_fs
1766 * @id: btree to insert into
1767 * @insert_keys: list of keys to insert
1768 * @hook: insert callback
1770 int bch2_btree_insert(struct bch_fs *c, enum btree_id id,
1772 struct disk_reservation *disk_res,
1773 u64 *journal_seq, int flags)
1775 return bch2_trans_do(c, disk_res, journal_seq, flags,
1776 __bch2_btree_insert(&trans, id, k, 0));
1779 int bch2_btree_delete_extent_at(struct btree_trans *trans, struct btree_iter *iter,
1780 unsigned len, unsigned update_flags)
1784 k = bch2_trans_kmalloc(trans, sizeof(*k));
1790 bch2_key_resize(&k->k, len);
1791 return bch2_trans_update(trans, iter, k, update_flags);
1794 int bch2_btree_delete_at(struct btree_trans *trans,
1795 struct btree_iter *iter, unsigned update_flags)
1797 return bch2_btree_delete_extent_at(trans, iter, 0, update_flags);
1800 int bch2_btree_delete_range_trans(struct btree_trans *trans, enum btree_id id,
1801 struct bpos start, struct bpos end,
1802 unsigned update_flags,
1805 u32 restart_count = trans->restart_count;
1806 struct btree_iter iter;
1810 bch2_trans_iter_init(trans, &iter, id, start, BTREE_ITER_INTENT);
1811 while ((k = bch2_btree_iter_peek_upto(&iter, end)).k) {
1812 struct disk_reservation disk_res =
1813 bch2_disk_reservation_init(trans->c, 0);
1814 struct bkey_i delete;
1820 bkey_init(&delete.k);
1823 * This could probably be more efficient for extents:
1827 * For extents, iter.pos won't necessarily be the same as
1828 * bkey_start_pos(k.k) (for non extents they always will be the
1829 * same). It's important that we delete starting from iter.pos
1830 * because the range we want to delete could start in the middle
1833 * (bch2_btree_iter_peek() does guarantee that iter.pos >=
1834 * bkey_start_pos(k.k)).
1836 delete.k.p = iter.pos;
1838 if (iter.flags & BTREE_ITER_IS_EXTENTS)
1839 bch2_key_resize(&delete.k,
1840 bpos_min(end, k.k->p).offset -
1843 ret = bch2_trans_update(trans, &iter, &delete, update_flags) ?:
1844 bch2_trans_commit(trans, &disk_res, journal_seq,
1845 BTREE_INSERT_NOFAIL);
1846 bch2_disk_reservation_put(trans->c, &disk_res);
1849 * the bch2_trans_begin() call is in a weird place because we
1850 * need to call it after every transaction commit, to avoid path
1851 * overflow, but don't want to call it if the delete operation
1852 * is a no-op and we have no work to do:
1854 bch2_trans_begin(trans);
1856 if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
1861 bch2_trans_iter_exit(trans, &iter);
1863 if (!ret && trans_was_restarted(trans, restart_count))
1864 ret = -BCH_ERR_transaction_restart_nested;
1869 * bch_btree_delete_range - delete everything within a given range
1871 * Range is a half open interval - [start, end)
1873 int bch2_btree_delete_range(struct bch_fs *c, enum btree_id id,
1874 struct bpos start, struct bpos end,
1875 unsigned update_flags,
1878 int ret = bch2_trans_run(c,
1879 bch2_btree_delete_range_trans(&trans, id, start, end,
1880 update_flags, journal_seq));
1881 if (ret == -BCH_ERR_transaction_restart_nested)
1886 static int __bch2_trans_log_msg(darray_u64 *entries, const char *fmt, va_list args)
1888 struct printbuf buf = PRINTBUF;
1889 struct jset_entry_log *l;
1893 prt_vprintf(&buf, fmt, args);
1894 ret = buf.allocation_failure ? -ENOMEM : 0;
1898 u64s = DIV_ROUND_UP(buf.pos, sizeof(u64));
1900 ret = darray_make_room(entries, jset_u64s(u64s));
1904 l = (void *) &darray_top(*entries);
1905 l->entry.u64s = cpu_to_le16(u64s);
1906 l->entry.btree_id = 0;
1908 l->entry.type = BCH_JSET_ENTRY_log;
1909 l->entry.pad[0] = 0;
1910 l->entry.pad[1] = 0;
1911 l->entry.pad[2] = 0;
1912 memcpy(l->d, buf.buf, buf.pos);
1914 l->d[buf.pos++] = '\0';
1916 entries->nr += jset_u64s(u64s);
1918 printbuf_exit(&buf);
1922 int bch2_trans_log_msg(struct btree_trans *trans, const char *fmt, ...)
1927 va_start(args, fmt);
1928 ret = __bch2_trans_log_msg(&trans->extra_journal_entries, fmt, args);
1934 int bch2_fs_log_msg(struct bch_fs *c, const char *fmt, ...)
1939 va_start(args, fmt);
1941 if (!test_bit(JOURNAL_STARTED, &c->journal.flags)) {
1942 ret = __bch2_trans_log_msg(&c->journal.early_journal_entries, fmt, args);
1944 ret = bch2_trans_do(c, NULL, NULL, BTREE_INSERT_LAZY_RW,
1945 __bch2_trans_log_msg(&trans.extra_journal_entries, fmt, args));