1 // SPDX-License-Identifier: GPL-2.0
6 #include "btree_iter.h"
7 #include "btree_journal_iter.h"
8 #include "btree_key_cache.h"
9 #include "btree_update_interior.h"
10 #include "btree_write_buffer.h"
15 #include "journal_reclaim.h"
19 #include <linux/prefetch.h>
21 static void verify_update_old_key(struct btree_trans *trans, struct btree_insert_entry *i)
23 #ifdef CONFIG_BCACHEFS_DEBUG
24 struct bch_fs *c = trans->c;
26 struct bkey_s_c k = bch2_btree_path_peek_slot_exact(i->path, &u);
28 if (unlikely(trans->journal_replay_not_finished)) {
30 bch2_journal_keys_peek_slot(c, i->btree_id, i->level, i->k->k.p);
33 k = bkey_i_to_s_c(j_k);
37 u.needs_whiteout = i->old_k.needs_whiteout;
39 BUG_ON(memcmp(&i->old_k, &u, sizeof(struct bkey)));
40 BUG_ON(i->old_v != k.v);
44 static inline struct btree_path_level *insert_l(struct btree_insert_entry *i)
46 return i->path->l + i->level;
49 static inline bool same_leaf_as_prev(struct btree_trans *trans,
50 struct btree_insert_entry *i)
52 return i != trans->updates &&
53 insert_l(&i[0])->b == insert_l(&i[-1])->b;
56 static inline bool same_leaf_as_next(struct btree_trans *trans,
57 struct btree_insert_entry *i)
59 return i + 1 < trans->updates + trans->nr_updates &&
60 insert_l(&i[0])->b == insert_l(&i[1])->b;
63 inline void bch2_btree_node_prep_for_write(struct btree_trans *trans,
64 struct btree_path *path,
67 struct bch_fs *c = trans->c;
69 if (unlikely(btree_node_just_written(b)) &&
70 bch2_btree_post_write_cleanup(c, b))
71 bch2_trans_node_reinit_iter(trans, b);
74 * If the last bset has been written, or if it's gotten too big - start
75 * a new bset to insert into:
77 if (want_new_bset(c, b))
78 bch2_btree_init_next(trans, b);
81 static noinline int trans_lock_write_fail(struct btree_trans *trans, struct btree_insert_entry *i)
83 while (--i >= trans->updates) {
84 if (same_leaf_as_prev(trans, i))
87 bch2_btree_node_unlock_write(trans, i->path, insert_l(i)->b);
90 trace_and_count(trans->c, trans_restart_would_deadlock_write, trans);
91 return btree_trans_restart(trans, BCH_ERR_transaction_restart_would_deadlock_write);
94 static inline int bch2_trans_lock_write(struct btree_trans *trans)
96 struct btree_insert_entry *i;
98 EBUG_ON(trans->write_locked);
100 trans_for_each_update(trans, i) {
101 if (same_leaf_as_prev(trans, i))
104 if (bch2_btree_node_lock_write(trans, i->path, &insert_l(i)->b->c))
105 return trans_lock_write_fail(trans, i);
108 bch2_btree_node_prep_for_write(trans, i->path, insert_l(i)->b);
111 trans->write_locked = true;
115 static inline void bch2_trans_unlock_write(struct btree_trans *trans)
117 if (likely(trans->write_locked)) {
118 struct btree_insert_entry *i;
120 trans_for_each_update(trans, i)
121 if (!same_leaf_as_prev(trans, i))
122 bch2_btree_node_unlock_write_inlined(trans, i->path,
124 trans->write_locked = false;
128 /* Inserting into a given leaf node (last stage of insert): */
130 /* Handle overwrites and do insert, for non extents: */
131 bool bch2_btree_bset_insert_key(struct btree_trans *trans,
132 struct btree_path *path,
134 struct btree_node_iter *node_iter,
135 struct bkey_i *insert)
137 struct bkey_packed *k;
138 unsigned clobber_u64s = 0, new_u64s = 0;
140 EBUG_ON(btree_node_just_written(b));
141 EBUG_ON(bset_written(b, btree_bset_last(b)));
142 EBUG_ON(bkey_deleted(&insert->k) && bkey_val_u64s(&insert->k));
143 EBUG_ON(bpos_lt(insert->k.p, b->data->min_key));
144 EBUG_ON(bpos_gt(insert->k.p, b->data->max_key));
145 EBUG_ON(insert->k.u64s >
146 bch_btree_keys_u64s_remaining(trans->c, b));
147 EBUG_ON(!b->c.level && !bpos_eq(insert->k.p, path->pos));
149 k = bch2_btree_node_iter_peek_all(node_iter, b);
150 if (k && bkey_cmp_left_packed(b, k, &insert->k.p))
153 /* @k is the key being overwritten/deleted, if any: */
154 EBUG_ON(k && bkey_deleted(k));
156 /* Deleting, but not found? nothing to do: */
157 if (bkey_deleted(&insert->k) && !k)
160 if (bkey_deleted(&insert->k)) {
162 btree_account_key_drop(b, k);
163 k->type = KEY_TYPE_deleted;
165 if (k->needs_whiteout)
166 push_whiteout(trans->c, b, insert->k.p);
167 k->needs_whiteout = false;
169 if (k >= btree_bset_last(b)->start) {
170 clobber_u64s = k->u64s;
171 bch2_bset_delete(b, k, clobber_u64s);
174 bch2_btree_path_fix_key_modified(trans, b, k);
182 btree_account_key_drop(b, k);
183 k->type = KEY_TYPE_deleted;
185 insert->k.needs_whiteout = k->needs_whiteout;
186 k->needs_whiteout = false;
188 if (k >= btree_bset_last(b)->start) {
189 clobber_u64s = k->u64s;
192 bch2_btree_path_fix_key_modified(trans, b, k);
196 k = bch2_btree_node_iter_bset_pos(node_iter, b, bset_tree_last(b));
198 bch2_bset_insert(b, node_iter, k, insert, clobber_u64s);
201 if (clobber_u64s != new_u64s)
202 bch2_btree_node_iter_fix(trans, path, b, node_iter, k,
203 clobber_u64s, new_u64s);
207 static int __btree_node_flush(struct journal *j, struct journal_entry_pin *pin,
210 struct bch_fs *c = container_of(j, struct bch_fs, journal);
211 struct btree_write *w = container_of(pin, struct btree_write, journal);
212 struct btree *b = container_of(w, struct btree, writes[i]);
213 struct btree_trans *trans = bch2_trans_get(c);
214 unsigned long old, new, v;
215 unsigned idx = w - b->writes;
217 btree_node_lock_nopath_nofail(trans, &b->c, SIX_LOCK_read);
218 v = READ_ONCE(b->flags);
223 if (!(old & (1 << BTREE_NODE_dirty)) ||
224 !!(old & (1 << BTREE_NODE_write_idx)) != idx ||
225 w->journal.seq != seq)
228 new &= ~BTREE_WRITE_TYPE_MASK;
229 new |= BTREE_WRITE_journal_reclaim;
230 new |= 1 << BTREE_NODE_need_write;
231 } while ((v = cmpxchg(&b->flags, old, new)) != old);
233 btree_node_write_if_need(c, b, SIX_LOCK_read);
234 six_unlock_read(&b->c.lock);
236 bch2_trans_put(trans);
240 int bch2_btree_node_flush0(struct journal *j, struct journal_entry_pin *pin, u64 seq)
242 return __btree_node_flush(j, pin, 0, seq);
245 int bch2_btree_node_flush1(struct journal *j, struct journal_entry_pin *pin, u64 seq)
247 return __btree_node_flush(j, pin, 1, seq);
250 inline void bch2_btree_add_journal_pin(struct bch_fs *c,
251 struct btree *b, u64 seq)
253 struct btree_write *w = btree_current_write(b);
255 bch2_journal_pin_add(&c->journal, seq, &w->journal,
256 btree_node_write_idx(b) == 0
257 ? bch2_btree_node_flush0
258 : bch2_btree_node_flush1);
262 * bch2_btree_insert_key_leaf() - insert a key one key into a leaf node
263 * @trans: btree transaction object
264 * @path: path pointing to @insert's pos
265 * @insert: key to insert
266 * @journal_seq: sequence number of journal reservation
268 inline void bch2_btree_insert_key_leaf(struct btree_trans *trans,
269 struct btree_path *path,
270 struct bkey_i *insert,
273 struct bch_fs *c = trans->c;
274 struct btree *b = path_l(path)->b;
275 struct bset_tree *t = bset_tree_last(b);
276 struct bset *i = bset(b, t);
277 int old_u64s = bset_u64s(t);
278 int old_live_u64s = b->nr.live_u64s;
279 int live_u64s_added, u64s_added;
281 if (unlikely(!bch2_btree_bset_insert_key(trans, path, b,
282 &path_l(path)->iter, insert)))
285 i->journal_seq = cpu_to_le64(max(journal_seq, le64_to_cpu(i->journal_seq)));
287 bch2_btree_add_journal_pin(c, b, journal_seq);
289 if (unlikely(!btree_node_dirty(b))) {
290 EBUG_ON(test_bit(BCH_FS_clean_shutdown, &c->flags));
291 set_btree_node_dirty_acct(c, b);
294 live_u64s_added = (int) b->nr.live_u64s - old_live_u64s;
295 u64s_added = (int) bset_u64s(t) - old_u64s;
297 if (b->sib_u64s[0] != U16_MAX && live_u64s_added < 0)
298 b->sib_u64s[0] = max(0, (int) b->sib_u64s[0] + live_u64s_added);
299 if (b->sib_u64s[1] != U16_MAX && live_u64s_added < 0)
300 b->sib_u64s[1] = max(0, (int) b->sib_u64s[1] + live_u64s_added);
302 if (u64s_added > live_u64s_added &&
303 bch2_maybe_compact_whiteouts(c, b))
304 bch2_trans_node_reinit_iter(trans, b);
307 /* Cached btree updates: */
309 /* Normal update interface: */
311 static inline void btree_insert_entry_checks(struct btree_trans *trans,
312 struct btree_insert_entry *i)
314 BUG_ON(!bpos_eq(i->k->k.p, i->path->pos));
315 BUG_ON(i->cached != i->path->cached);
316 BUG_ON(i->level != i->path->level);
317 BUG_ON(i->btree_id != i->path->btree_id);
319 btree_type_has_snapshots(i->btree_id) &&
320 !(i->flags & BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) &&
321 test_bit(JOURNAL_REPLAY_DONE, &trans->c->journal.flags) &&
322 i->k->k.p.snapshot &&
323 bch2_snapshot_is_internal_node(trans->c, i->k->k.p.snapshot));
326 static __always_inline int bch2_trans_journal_res_get(struct btree_trans *trans,
329 return bch2_journal_res_get(&trans->c->journal, &trans->journal_res,
330 trans->journal_u64s, flags);
333 #define JSET_ENTRY_LOG_U64s 4
335 static noinline void journal_transaction_name(struct btree_trans *trans)
337 struct bch_fs *c = trans->c;
338 struct journal *j = &c->journal;
339 struct jset_entry *entry =
340 bch2_journal_add_entry(j, &trans->journal_res,
341 BCH_JSET_ENTRY_log, 0, 0,
342 JSET_ENTRY_LOG_U64s);
343 struct jset_entry_log *l =
344 container_of(entry, struct jset_entry_log, entry);
346 strncpy(l->d, trans->fn, JSET_ENTRY_LOG_U64s * sizeof(u64));
349 static inline int btree_key_can_insert(struct btree_trans *trans,
350 struct btree *b, unsigned u64s)
352 struct bch_fs *c = trans->c;
354 if (!bch2_btree_node_insert_fits(c, b, u64s))
355 return -BCH_ERR_btree_insert_btree_node_full;
361 btree_key_can_insert_cached_slowpath(struct btree_trans *trans, unsigned flags,
362 struct btree_path *path, unsigned new_u64s)
364 struct btree_insert_entry *i;
365 struct bkey_cached *ck = (void *) path->l[0].b;
366 struct bkey_i *new_k;
369 bch2_trans_unlock_write(trans);
370 bch2_trans_unlock(trans);
372 new_k = kmalloc(new_u64s * sizeof(u64), GFP_KERNEL);
374 bch_err(trans->c, "error allocating memory for key cache key, btree %s u64s %u",
375 bch2_btree_id_str(path->btree_id), new_u64s);
376 return -BCH_ERR_ENOMEM_btree_key_cache_insert;
379 ret = bch2_trans_relock(trans) ?:
380 bch2_trans_lock_write(trans);
386 memcpy(new_k, ck->k, ck->u64s * sizeof(u64));
388 trans_for_each_update(trans, i)
389 if (i->old_v == &ck->k->v)
390 i->old_v = &new_k->v;
398 static int btree_key_can_insert_cached(struct btree_trans *trans, unsigned flags,
399 struct btree_path *path, unsigned u64s)
401 struct bch_fs *c = trans->c;
402 struct bkey_cached *ck = (void *) path->l[0].b;
403 struct btree_insert_entry *i;
405 struct bkey_i *new_k;
407 EBUG_ON(path->level);
409 if (!test_bit(BKEY_CACHED_DIRTY, &ck->flags) &&
410 bch2_btree_key_cache_must_wait(c) &&
411 !(flags & BCH_TRANS_COMMIT_journal_reclaim))
412 return -BCH_ERR_btree_insert_need_journal_reclaim;
415 * bch2_varint_decode can read past the end of the buffer by at most 7
416 * bytes (it won't be used):
420 if (u64s <= ck->u64s)
423 new_u64s = roundup_pow_of_two(u64s);
424 new_k = krealloc(ck->k, new_u64s * sizeof(u64), GFP_NOWAIT);
425 if (unlikely(!new_k))
426 return btree_key_can_insert_cached_slowpath(trans, flags, path, new_u64s);
428 trans_for_each_update(trans, i)
429 if (i->old_v == &ck->k->v)
430 i->old_v = &new_k->v;
439 static int run_one_mem_trigger(struct btree_trans *trans,
440 struct btree_insert_entry *i,
443 struct bkey_s_c old = { &i->old_k, i->old_v };
444 struct bkey_i *new = i->k;
445 const struct bkey_ops *old_ops = bch2_bkey_type_ops(old.k->type);
446 const struct bkey_ops *new_ops = bch2_bkey_type_ops(i->k->k.type);
449 verify_update_old_key(trans, i);
451 if (unlikely(flags & BTREE_TRIGGER_NORUN))
454 if (!btree_node_type_needs_gc(__btree_node_type(i->level, i->btree_id)))
457 if (old_ops->atomic_trigger == new_ops->atomic_trigger) {
458 ret = bch2_mark_key(trans, i->btree_id, i->level,
459 old, bkey_i_to_s_c(new),
460 BTREE_TRIGGER_INSERT|BTREE_TRIGGER_OVERWRITE|flags);
462 struct bkey _deleted = KEY(0, 0, 0);
463 struct bkey_s_c deleted = (struct bkey_s_c) { &_deleted, NULL };
465 _deleted.p = i->path->pos;
467 ret = bch2_mark_key(trans, i->btree_id, i->level,
468 deleted, bkey_i_to_s_c(new),
469 BTREE_TRIGGER_INSERT|flags) ?:
470 bch2_mark_key(trans, i->btree_id, i->level,
472 BTREE_TRIGGER_OVERWRITE|flags);
478 static int run_one_trans_trigger(struct btree_trans *trans, struct btree_insert_entry *i,
482 * Transactional triggers create new btree_insert_entries, so we can't
483 * pass them a pointer to a btree_insert_entry, that memory is going to
486 struct bkey old_k = i->old_k;
487 struct bkey_s_c old = { &old_k, i->old_v };
488 const struct bkey_ops *old_ops = bch2_bkey_type_ops(old.k->type);
489 const struct bkey_ops *new_ops = bch2_bkey_type_ops(i->k->k.type);
491 verify_update_old_key(trans, i);
493 if ((i->flags & BTREE_TRIGGER_NORUN) ||
494 !(BTREE_NODE_TYPE_HAS_TRANS_TRIGGERS & (1U << i->bkey_type)))
497 if (!i->insert_trigger_run &&
498 !i->overwrite_trigger_run &&
499 old_ops->trans_trigger == new_ops->trans_trigger) {
500 i->overwrite_trigger_run = true;
501 i->insert_trigger_run = true;
502 return bch2_trans_mark_key(trans, i->btree_id, i->level, old, i->k,
503 BTREE_TRIGGER_INSERT|
504 BTREE_TRIGGER_OVERWRITE|
506 } else if (overwrite && !i->overwrite_trigger_run) {
507 i->overwrite_trigger_run = true;
508 return bch2_trans_mark_old(trans, i->btree_id, i->level, old, i->flags) ?: 1;
509 } else if (!overwrite && !i->insert_trigger_run) {
510 i->insert_trigger_run = true;
511 return bch2_trans_mark_new(trans, i->btree_id, i->level, i->k, i->flags) ?: 1;
517 static int run_btree_triggers(struct btree_trans *trans, enum btree_id btree_id,
518 struct btree_insert_entry *btree_id_start)
520 struct btree_insert_entry *i;
521 bool trans_trigger_run;
524 for (overwrite = 1; overwrite >= 0; --overwrite) {
527 * Running triggers will append more updates to the list of updates as
531 trans_trigger_run = false;
533 for (i = btree_id_start;
534 i < trans->updates + trans->nr_updates && i->btree_id <= btree_id;
536 if (i->btree_id != btree_id)
539 ret = run_one_trans_trigger(trans, i, overwrite);
543 trans_trigger_run = true;
545 } while (trans_trigger_run);
551 static int bch2_trans_commit_run_triggers(struct btree_trans *trans)
553 struct btree_insert_entry *i = NULL, *btree_id_start = trans->updates;
554 unsigned btree_id = 0;
559 * For a given btree, this algorithm runs insert triggers before
560 * overwrite triggers: this is so that when extents are being moved
561 * (e.g. by FALLOCATE_FL_INSERT_RANGE), we don't drop references before
564 for (btree_id = 0; btree_id < BTREE_ID_NR; btree_id++) {
565 if (btree_id == BTREE_ID_alloc)
568 while (btree_id_start < trans->updates + trans->nr_updates &&
569 btree_id_start->btree_id < btree_id)
572 ret = run_btree_triggers(trans, btree_id, btree_id_start);
577 trans_for_each_update(trans, i) {
578 if (i->btree_id > BTREE_ID_alloc)
580 if (i->btree_id == BTREE_ID_alloc) {
581 ret = run_btree_triggers(trans, BTREE_ID_alloc, i);
588 #ifdef CONFIG_BCACHEFS_DEBUG
589 trans_for_each_update(trans, i)
590 BUG_ON(!(i->flags & BTREE_TRIGGER_NORUN) &&
591 (BTREE_NODE_TYPE_HAS_TRANS_TRIGGERS & (1U << i->bkey_type)) &&
592 (!i->insert_trigger_run || !i->overwrite_trigger_run));
597 static noinline int bch2_trans_commit_run_gc_triggers(struct btree_trans *trans)
599 struct bch_fs *c = trans->c;
600 struct btree_insert_entry *i;
603 trans_for_each_update(trans, i) {
605 * XXX: synchronization of cached update triggers with gc
606 * XXX: synchronization of interior node updates with gc
608 BUG_ON(i->cached || i->level);
610 if (gc_visited(c, gc_pos_btree_node(insert_l(i)->b))) {
611 ret = run_one_mem_trigger(trans, i, i->flags|BTREE_TRIGGER_GC);
621 bch2_trans_commit_write_locked(struct btree_trans *trans, unsigned flags,
622 struct btree_insert_entry **stopped_at,
623 unsigned long trace_ip)
625 struct bch_fs *c = trans->c;
626 struct btree_insert_entry *i;
627 struct btree_write_buffered_key *wb;
628 struct btree_trans_commit_hook *h;
633 trace_and_count(c, trans_restart_fault_inject, trans, trace_ip);
634 return btree_trans_restart_nounlock(trans, BCH_ERR_transaction_restart_fault_inject);
638 * Check if the insert will fit in the leaf node with the write lock
639 * held, otherwise another thread could write the node changing the
640 * amount of space available:
643 prefetch(&trans->c->journal.flags);
645 trans_for_each_update(trans, i) {
646 /* Multiple inserts might go to same leaf: */
647 if (!same_leaf_as_prev(trans, i))
650 u64s += i->k->k.u64s;
652 ? btree_key_can_insert(trans, insert_l(i)->b, u64s)
653 : btree_key_can_insert_cached(trans, flags, i->path, u64s);
659 i->k->k.needs_whiteout = false;
662 if (trans->nr_wb_updates &&
663 trans->nr_wb_updates + c->btree_write_buffer.state.nr > c->btree_write_buffer.size)
664 return -BCH_ERR_btree_insert_need_flush_buffer;
667 * Don't get journal reservation until after we know insert will
670 if (likely(!(flags & BCH_TRANS_COMMIT_no_journal_res))) {
671 ret = bch2_trans_journal_res_get(trans,
672 (flags & BCH_WATERMARK_MASK)|
673 JOURNAL_RES_GET_NONBLOCK);
677 if (unlikely(trans->journal_transaction_names))
678 journal_transaction_name(trans);
682 * Not allowed to fail after we've gotten our journal reservation - we
686 if (IS_ENABLED(CONFIG_BCACHEFS_DEBUG) &&
687 !(flags & BCH_TRANS_COMMIT_no_journal_res)) {
688 if (bch2_journal_seq_verify)
689 trans_for_each_update(trans, i)
690 i->k->k.version.lo = trans->journal_res.seq;
691 else if (bch2_inject_invalid_keys)
692 trans_for_each_update(trans, i)
693 i->k->k.version = MAX_VERSION;
696 if (trans->fs_usage_deltas &&
697 bch2_trans_fs_usage_apply(trans, trans->fs_usage_deltas))
698 return -BCH_ERR_btree_insert_need_mark_replicas;
700 if (trans->nr_wb_updates) {
701 EBUG_ON(flags & BCH_TRANS_COMMIT_no_journal_res);
703 ret = bch2_btree_insert_keys_write_buffer(trans);
705 goto revert_fs_usage;
710 ret = h->fn(trans, h);
712 goto revert_fs_usage;
716 trans_for_each_update(trans, i)
717 if (BTREE_NODE_TYPE_HAS_MEM_TRIGGERS & (1U << i->bkey_type)) {
718 ret = run_one_mem_trigger(trans, i, i->flags);
723 if (unlikely(c->gc_pos.phase)) {
724 ret = bch2_trans_commit_run_gc_triggers(trans);
729 if (unlikely(trans->extra_journal_entries.nr)) {
730 memcpy_u64s_small(journal_res_entry(&c->journal, &trans->journal_res),
731 trans->extra_journal_entries.data,
732 trans->extra_journal_entries.nr);
734 trans->journal_res.offset += trans->extra_journal_entries.nr;
735 trans->journal_res.u64s -= trans->extra_journal_entries.nr;
738 if (likely(!(flags & BCH_TRANS_COMMIT_no_journal_res))) {
739 struct journal *j = &c->journal;
740 struct jset_entry *entry;
742 trans_for_each_update(trans, i) {
743 if (i->key_cache_already_flushed)
746 if (i->flags & BTREE_UPDATE_NOJOURNAL)
749 verify_update_old_key(trans, i);
751 if (trans->journal_transaction_names) {
752 entry = bch2_journal_add_entry(j, &trans->journal_res,
753 BCH_JSET_ENTRY_overwrite,
754 i->btree_id, i->level,
756 bkey_reassemble((struct bkey_i *) entry->start,
757 (struct bkey_s_c) { &i->old_k, i->old_v });
760 entry = bch2_journal_add_entry(j, &trans->journal_res,
761 BCH_JSET_ENTRY_btree_keys,
762 i->btree_id, i->level,
764 bkey_copy((struct bkey_i *) entry->start, i->k);
767 trans_for_each_wb_update(trans, wb) {
768 entry = bch2_journal_add_entry(j, &trans->journal_res,
769 BCH_JSET_ENTRY_btree_keys,
772 bkey_copy((struct bkey_i *) entry->start, &wb->k);
775 if (trans->journal_seq)
776 *trans->journal_seq = trans->journal_res.seq;
779 trans_for_each_update(trans, i) {
781 bch2_btree_insert_key_leaf(trans, i->path, i->k, trans->journal_res.seq);
782 } else if (!i->key_cache_already_flushed)
783 bch2_btree_insert_key_cached(trans, flags, i);
785 bch2_btree_key_cache_drop(trans, i->path);
786 btree_path_set_dirty(i->path, BTREE_ITER_NEED_TRAVERSE);
794 if (trans->fs_usage_deltas)
795 bch2_trans_fs_usage_revert(trans, trans->fs_usage_deltas);
799 static noinline void bch2_drop_overwrites_from_journal(struct btree_trans *trans)
801 struct btree_insert_entry *i;
802 struct btree_write_buffered_key *wb;
804 trans_for_each_update(trans, i)
805 bch2_journal_key_overwritten(trans->c, i->btree_id, i->level, i->k->k.p);
807 trans_for_each_wb_update(trans, wb)
808 bch2_journal_key_overwritten(trans->c, wb->btree, 0, wb->k.k.p);
811 static noinline int bch2_trans_commit_bkey_invalid(struct btree_trans *trans,
812 enum bkey_invalid_flags flags,
813 struct btree_insert_entry *i,
814 struct printbuf *err)
816 struct bch_fs *c = trans->c;
819 prt_printf(err, "invalid bkey on insert from %s -> %ps",
820 trans->fn, (void *) i->ip_allocated);
822 printbuf_indent_add(err, 2);
824 bch2_bkey_val_to_text(err, c, bkey_i_to_s_c(i->k));
827 bch2_bkey_invalid(c, bkey_i_to_s_c(i->k), i->bkey_type, flags, err);
828 bch2_print_string_as_lines(KERN_ERR, err->buf);
830 bch2_inconsistent_error(c);
831 bch2_dump_trans_updates(trans);
836 static int bch2_trans_commit_journal_pin_flush(struct journal *j,
837 struct journal_entry_pin *_pin, u64 seq)
843 * Get journal reservation, take write locks, and attempt to do btree update(s):
845 static inline int do_bch2_trans_commit(struct btree_trans *trans, unsigned flags,
846 struct btree_insert_entry **stopped_at,
847 unsigned long trace_ip)
849 struct bch_fs *c = trans->c;
850 struct btree_insert_entry *i;
851 int ret = 0, u64s_delta = 0;
853 trans_for_each_update(trans, i) {
857 u64s_delta += !bkey_deleted(&i->k->k) ? i->k->k.u64s : 0;
858 u64s_delta -= i->old_btree_u64s;
860 if (!same_leaf_as_next(trans, i)) {
861 if (u64s_delta <= 0) {
862 ret = bch2_foreground_maybe_merge(trans, i->path,
872 ret = bch2_trans_lock_write(trans);
876 ret = bch2_trans_commit_write_locked(trans, flags, stopped_at, trace_ip);
878 if (!ret && unlikely(trans->journal_replay_not_finished))
879 bch2_drop_overwrites_from_journal(trans);
881 bch2_trans_unlock_write(trans);
883 if (!ret && trans->journal_pin)
884 bch2_journal_pin_add(&c->journal, trans->journal_res.seq,
886 bch2_trans_commit_journal_pin_flush);
889 * Drop journal reservation after dropping write locks, since dropping
890 * the journal reservation may kick off a journal write:
892 if (likely(!(flags & BCH_TRANS_COMMIT_no_journal_res)))
893 bch2_journal_res_put(&c->journal, &trans->journal_res);
898 static int journal_reclaim_wait_done(struct bch_fs *c)
900 int ret = bch2_journal_error(&c->journal) ?:
901 !bch2_btree_key_cache_must_wait(c);
904 journal_reclaim_kick(&c->journal);
909 int bch2_trans_commit_error(struct btree_trans *trans, unsigned flags,
910 struct btree_insert_entry *i,
911 int ret, unsigned long trace_ip)
913 struct bch_fs *c = trans->c;
916 case -BCH_ERR_btree_insert_btree_node_full:
917 ret = bch2_btree_split_leaf(trans, i->path, flags);
918 if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
919 trace_and_count(c, trans_restart_btree_node_split, trans, trace_ip, i->path);
921 case -BCH_ERR_btree_insert_need_mark_replicas:
922 ret = drop_locks_do(trans,
923 bch2_replicas_delta_list_mark(c, trans->fs_usage_deltas));
925 case -BCH_ERR_journal_res_get_blocked:
927 * XXX: this should probably be a separate BTREE_INSERT_NONBLOCK
930 if ((flags & BCH_TRANS_COMMIT_journal_reclaim) &&
931 (flags & BCH_WATERMARK_MASK) != BCH_WATERMARK_reclaim) {
932 ret = -BCH_ERR_journal_reclaim_would_deadlock;
936 ret = drop_locks_do(trans,
937 bch2_trans_journal_res_get(trans,
938 (flags & BCH_WATERMARK_MASK)|
939 JOURNAL_RES_GET_CHECK));
941 case -BCH_ERR_btree_insert_need_journal_reclaim:
942 bch2_trans_unlock(trans);
944 trace_and_count(c, trans_blocked_journal_reclaim, trans, trace_ip);
946 wait_event_freezable(c->journal.reclaim_wait,
947 (ret = journal_reclaim_wait_done(c)));
951 ret = bch2_trans_relock(trans);
953 case -BCH_ERR_btree_insert_need_flush_buffer: {
954 struct btree_write_buffer *wb = &c->btree_write_buffer;
958 if (wb->state.nr > wb->size * 3 / 4) {
959 bch2_trans_unlock(trans);
960 mutex_lock(&wb->flush_lock);
962 if (wb->state.nr > wb->size * 3 / 4) {
963 bch2_trans_begin(trans);
964 ret = bch2_btree_write_buffer_flush_locked(trans);
965 mutex_unlock(&wb->flush_lock);
967 trace_and_count(c, trans_restart_write_buffer_flush, trans, _THIS_IP_);
968 ret = btree_trans_restart(trans, BCH_ERR_transaction_restart_write_buffer_flush);
971 mutex_unlock(&wb->flush_lock);
972 ret = bch2_trans_relock(trans);
982 BUG_ON(bch2_err_matches(ret, BCH_ERR_transaction_restart) != !!trans->restarted);
984 bch2_fs_inconsistent_on(bch2_err_matches(ret, ENOSPC) &&
985 (flags & BCH_TRANS_COMMIT_no_enospc), c,
986 "%s: incorrectly got %s\n", __func__, bch2_err_str(ret));
992 bch2_trans_commit_get_rw_cold(struct btree_trans *trans, unsigned flags)
994 struct bch_fs *c = trans->c;
997 if (likely(!(flags & BCH_TRANS_COMMIT_lazy_rw)) ||
998 test_bit(BCH_FS_started, &c->flags))
999 return -BCH_ERR_erofs_trans_commit;
1001 ret = drop_locks_do(trans, bch2_fs_read_write_early(c));
1005 bch2_write_ref_get(c, BCH_WRITE_REF_trans);
1010 * This is for updates done in the early part of fsck - btree_gc - before we've
1011 * gone RW. we only add the new key to the list of keys for journal replay to
1015 do_bch2_trans_commit_to_journal_replay(struct btree_trans *trans)
1017 struct bch_fs *c = trans->c;
1018 struct btree_insert_entry *i;
1021 trans_for_each_update(trans, i) {
1022 ret = bch2_journal_key_insert(c, i->btree_id, i->level, i->k);
1030 int __bch2_trans_commit(struct btree_trans *trans, unsigned flags)
1032 struct bch_fs *c = trans->c;
1033 struct btree_insert_entry *i = NULL;
1034 struct btree_write_buffered_key *wb;
1037 if (!trans->nr_updates &&
1038 !trans->nr_wb_updates &&
1039 !trans->extra_journal_entries.nr)
1042 ret = bch2_trans_commit_run_triggers(trans);
1046 trans_for_each_update(trans, i) {
1047 struct printbuf buf = PRINTBUF;
1048 enum bkey_invalid_flags invalid_flags = 0;
1050 if (!(flags & BCH_TRANS_COMMIT_no_journal_res))
1051 invalid_flags |= BKEY_INVALID_WRITE|BKEY_INVALID_COMMIT;
1053 if (unlikely(bch2_bkey_invalid(c, bkey_i_to_s_c(i->k),
1054 i->bkey_type, invalid_flags, &buf)))
1055 ret = bch2_trans_commit_bkey_invalid(trans, invalid_flags, i, &buf);
1056 btree_insert_entry_checks(trans, i);
1057 printbuf_exit(&buf);
1063 if (unlikely(!test_bit(BCH_FS_may_go_rw, &c->flags))) {
1064 ret = do_bch2_trans_commit_to_journal_replay(trans);
1068 if (!(flags & BCH_TRANS_COMMIT_no_check_rw) &&
1069 unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_trans))) {
1070 ret = bch2_trans_commit_get_rw_cold(trans, flags);
1075 if (c->btree_write_buffer.state.nr > c->btree_write_buffer.size / 2 &&
1076 mutex_trylock(&c->btree_write_buffer.flush_lock)) {
1077 bch2_trans_begin(trans);
1078 bch2_trans_unlock(trans);
1080 ret = bch2_btree_write_buffer_flush_locked(trans);
1081 mutex_unlock(&c->btree_write_buffer.flush_lock);
1083 trace_and_count(c, trans_restart_write_buffer_flush, trans, _THIS_IP_);
1084 ret = btree_trans_restart(trans, BCH_ERR_transaction_restart_write_buffer_flush);
1089 EBUG_ON(test_bit(BCH_FS_clean_shutdown, &c->flags));
1091 trans->journal_u64s = trans->extra_journal_entries.nr;
1092 trans->journal_transaction_names = READ_ONCE(c->opts.journal_transaction_names);
1093 if (trans->journal_transaction_names)
1094 trans->journal_u64s += jset_u64s(JSET_ENTRY_LOG_U64s);
1096 trans_for_each_update(trans, i) {
1097 EBUG_ON(!i->path->should_be_locked);
1099 ret = bch2_btree_path_upgrade(trans, i->path, i->level + 1);
1103 EBUG_ON(!btree_node_intent_locked(i->path, i->level));
1105 if (i->key_cache_already_flushed)
1108 if (i->flags & BTREE_UPDATE_NOJOURNAL)
1111 /* we're going to journal the key being updated: */
1112 trans->journal_u64s += jset_u64s(i->k->k.u64s);
1114 /* and we're also going to log the overwrite: */
1115 if (trans->journal_transaction_names)
1116 trans->journal_u64s += jset_u64s(i->old_k.u64s);
1119 trans_for_each_wb_update(trans, wb)
1120 trans->journal_u64s += jset_u64s(wb->k.k.u64s);
1122 if (trans->extra_journal_res) {
1123 ret = bch2_disk_reservation_add(c, trans->disk_res,
1124 trans->extra_journal_res,
1125 (flags & BCH_TRANS_COMMIT_no_enospc)
1126 ? BCH_DISK_RESERVATION_NOFAIL : 0);
1131 bch2_trans_verify_not_in_restart(trans);
1132 if (likely(!(flags & BCH_TRANS_COMMIT_no_journal_res)))
1133 memset(&trans->journal_res, 0, sizeof(trans->journal_res));
1135 ret = do_bch2_trans_commit(trans, flags, &i, _RET_IP_);
1137 /* make sure we didn't drop or screw up locks: */
1138 bch2_trans_verify_locks(trans);
1143 trace_and_count(c, transaction_commit, trans, _RET_IP_);
1145 if (likely(!(flags & BCH_TRANS_COMMIT_no_check_rw)))
1146 bch2_write_ref_put(c, BCH_WRITE_REF_trans);
1149 bch2_trans_downgrade(trans);
1150 bch2_trans_reset_updates(trans);
1154 ret = bch2_trans_commit_error(trans, flags, i, ret, _RET_IP_);
1159 * We might have done another transaction commit in the error path -
1160 * i.e. btree write buffer flush - which will have made use of
1161 * trans->journal_res, but with BCH_TRANS_COMMIT_no_journal_res that is
1162 * how the journal sequence number to pin is passed in - so we must
1165 if (flags & BCH_TRANS_COMMIT_no_journal_res) {
1166 ret = -BCH_ERR_transaction_restart_nested;