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"
14 #include "extent_update.h"
16 #include "journal_reclaim.h"
19 #include "subvolume.h"
22 #include <linux/prefetch.h>
23 #include <linux/sort.h>
24 #include <trace/events/bcachefs.h>
26 static int __must_check
27 bch2_trans_update_by_path(struct btree_trans *, struct btree_path *,
28 struct bkey_i *, enum btree_update_flags);
30 static inline int btree_insert_entry_cmp(const struct btree_insert_entry *l,
31 const struct btree_insert_entry *r)
33 return cmp_int(l->btree_id, r->btree_id) ?:
34 -cmp_int(l->level, r->level) ?:
35 bpos_cmp(l->k->k.p, r->k->k.p);
38 static inline struct btree_path_level *insert_l(struct btree_insert_entry *i)
40 return i->path->l + i->level;
43 static inline bool same_leaf_as_prev(struct btree_trans *trans,
44 struct btree_insert_entry *i)
46 return i != trans->updates &&
47 insert_l(&i[0])->b == insert_l(&i[-1])->b;
50 static inline bool same_leaf_as_next(struct btree_trans *trans,
51 struct btree_insert_entry *i)
53 return i + 1 < trans->updates + trans->nr_updates &&
54 insert_l(&i[0])->b == insert_l(&i[1])->b;
57 static inline void bch2_btree_node_prep_for_write(struct btree_trans *trans,
58 struct btree_path *path,
61 struct bch_fs *c = trans->c;
66 if (unlikely(btree_node_just_written(b)) &&
67 bch2_btree_post_write_cleanup(c, b))
68 bch2_trans_node_reinit_iter(trans, b);
71 * If the last bset has been written, or if it's gotten too big - start
72 * a new bset to insert into:
74 if (want_new_bset(c, b))
75 bch2_btree_init_next(trans, b);
78 void bch2_btree_node_lock_for_insert(struct btree_trans *trans,
79 struct btree_path *path,
82 bch2_btree_node_lock_write(trans, path, b);
83 bch2_btree_node_prep_for_write(trans, path, b);
86 /* Inserting into a given leaf node (last stage of insert): */
88 /* Handle overwrites and do insert, for non extents: */
89 bool bch2_btree_bset_insert_key(struct btree_trans *trans,
90 struct btree_path *path,
92 struct btree_node_iter *node_iter,
93 struct bkey_i *insert)
95 struct bkey_packed *k;
96 unsigned clobber_u64s = 0, new_u64s = 0;
98 EBUG_ON(btree_node_just_written(b));
99 EBUG_ON(bset_written(b, btree_bset_last(b)));
100 EBUG_ON(bkey_deleted(&insert->k) && bkey_val_u64s(&insert->k));
101 EBUG_ON(bpos_cmp(insert->k.p, b->data->min_key) < 0);
102 EBUG_ON(bpos_cmp(insert->k.p, b->data->max_key) > 0);
103 EBUG_ON(insert->k.u64s >
104 bch_btree_keys_u64s_remaining(trans->c, b));
106 k = bch2_btree_node_iter_peek_all(node_iter, b);
107 if (k && bkey_cmp_left_packed(b, k, &insert->k.p))
110 /* @k is the key being overwritten/deleted, if any: */
111 EBUG_ON(k && bkey_deleted(k));
113 /* Deleting, but not found? nothing to do: */
114 if (bkey_deleted(&insert->k) && !k)
117 if (bkey_deleted(&insert->k)) {
119 btree_account_key_drop(b, k);
120 k->type = KEY_TYPE_deleted;
122 if (k->needs_whiteout)
123 push_whiteout(trans->c, b, insert->k.p);
124 k->needs_whiteout = false;
126 if (k >= btree_bset_last(b)->start) {
127 clobber_u64s = k->u64s;
128 bch2_bset_delete(b, k, clobber_u64s);
131 bch2_btree_path_fix_key_modified(trans, b, k);
139 btree_account_key_drop(b, k);
140 k->type = KEY_TYPE_deleted;
142 insert->k.needs_whiteout = k->needs_whiteout;
143 k->needs_whiteout = false;
145 if (k >= btree_bset_last(b)->start) {
146 clobber_u64s = k->u64s;
149 bch2_btree_path_fix_key_modified(trans, b, k);
153 k = bch2_btree_node_iter_bset_pos(node_iter, b, bset_tree_last(b));
155 bch2_bset_insert(b, node_iter, k, insert, clobber_u64s);
158 if (clobber_u64s != new_u64s)
159 bch2_btree_node_iter_fix(trans, path, b, node_iter, k,
160 clobber_u64s, new_u64s);
164 static int __btree_node_flush(struct journal *j, struct journal_entry_pin *pin,
167 struct bch_fs *c = container_of(j, struct bch_fs, journal);
168 struct btree_write *w = container_of(pin, struct btree_write, journal);
169 struct btree *b = container_of(w, struct btree, writes[i]);
171 btree_node_lock_type(c, b, SIX_LOCK_read);
172 bch2_btree_node_write_cond(c, b,
173 (btree_current_write(b) == w && w->journal.seq == seq));
174 six_unlock_read(&b->c.lock);
178 static int btree_node_flush0(struct journal *j, struct journal_entry_pin *pin, u64 seq)
180 return __btree_node_flush(j, pin, 0, seq);
183 static int btree_node_flush1(struct journal *j, struct journal_entry_pin *pin, u64 seq)
185 return __btree_node_flush(j, pin, 1, seq);
188 inline void bch2_btree_add_journal_pin(struct bch_fs *c,
189 struct btree *b, u64 seq)
191 struct btree_write *w = btree_current_write(b);
193 bch2_journal_pin_add(&c->journal, seq, &w->journal,
194 btree_node_write_idx(b) == 0
196 : btree_node_flush1);
200 * btree_insert_key - insert a key one key into a leaf node
202 static bool btree_insert_key_leaf(struct btree_trans *trans,
203 struct btree_insert_entry *insert)
205 struct bch_fs *c = trans->c;
206 struct btree *b = insert_l(insert)->b;
207 struct bset_tree *t = bset_tree_last(b);
208 struct bset *i = bset(b, t);
209 int old_u64s = bset_u64s(t);
210 int old_live_u64s = b->nr.live_u64s;
211 int live_u64s_added, u64s_added;
213 if (unlikely(!bch2_btree_bset_insert_key(trans, insert->path, b,
214 &insert_l(insert)->iter, insert->k)))
217 i->journal_seq = cpu_to_le64(max(trans->journal_res.seq,
218 le64_to_cpu(i->journal_seq)));
220 bch2_btree_add_journal_pin(c, b, trans->journal_res.seq);
222 if (unlikely(!btree_node_dirty(b)))
223 set_btree_node_dirty(c, b);
225 live_u64s_added = (int) b->nr.live_u64s - old_live_u64s;
226 u64s_added = (int) bset_u64s(t) - old_u64s;
228 if (b->sib_u64s[0] != U16_MAX && live_u64s_added < 0)
229 b->sib_u64s[0] = max(0, (int) b->sib_u64s[0] + live_u64s_added);
230 if (b->sib_u64s[1] != U16_MAX && live_u64s_added < 0)
231 b->sib_u64s[1] = max(0, (int) b->sib_u64s[1] + live_u64s_added);
233 if (u64s_added > live_u64s_added &&
234 bch2_maybe_compact_whiteouts(c, b))
235 bch2_trans_node_reinit_iter(trans, b);
240 /* Cached btree updates: */
242 /* Normal update interface: */
244 static inline void btree_insert_entry_checks(struct btree_trans *trans,
245 struct btree_insert_entry *i)
247 BUG_ON(bpos_cmp(i->k->k.p, i->path->pos));
248 BUG_ON(i->cached != i->path->cached);
249 BUG_ON(i->level != i->path->level);
250 BUG_ON(i->btree_id != i->path->btree_id);
252 !(i->flags & BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) &&
253 test_bit(JOURNAL_REPLAY_DONE, &trans->c->journal.flags) &&
254 i->k->k.p.snapshot &&
255 bch2_snapshot_internal_node(trans->c, i->k->k.p.snapshot));
259 bch2_trans_journal_preres_get_cold(struct btree_trans *trans, unsigned u64s,
260 unsigned long trace_ip)
262 struct bch_fs *c = trans->c;
265 bch2_trans_unlock(trans);
267 ret = bch2_journal_preres_get(&c->journal,
268 &trans->journal_preres, u64s, 0);
272 if (!bch2_trans_relock(trans)) {
273 trace_trans_restart_journal_preres_get(trans->fn, trace_ip);
280 static inline int bch2_trans_journal_res_get(struct btree_trans *trans,
283 struct bch_fs *c = trans->c;
286 if (trans->flags & BTREE_INSERT_JOURNAL_RESERVED)
287 flags |= JOURNAL_RES_GET_RESERVED;
289 ret = bch2_journal_res_get(&c->journal, &trans->journal_res,
290 trans->journal_u64s, flags);
292 return ret == -EAGAIN ? BTREE_INSERT_NEED_JOURNAL_RES : ret;
295 #define JSET_ENTRY_LOG_U64s 4
297 static noinline void journal_transaction_name(struct btree_trans *trans)
299 struct bch_fs *c = trans->c;
300 struct jset_entry *entry = journal_res_entry(&c->journal, &trans->journal_res);
301 struct jset_entry_log *l = container_of(entry, struct jset_entry_log, entry);
302 unsigned u64s = JSET_ENTRY_LOG_U64s - 1;
303 unsigned b, buflen = u64s * sizeof(u64);
305 l->entry.u64s = cpu_to_le16(u64s);
306 l->entry.btree_id = 0;
308 l->entry.type = BCH_JSET_ENTRY_log;
312 b = min_t(unsigned, strlen(trans->fn), buflen);
313 memcpy(l->d, trans->fn, b);
317 trans->journal_res.offset += JSET_ENTRY_LOG_U64s;
318 trans->journal_res.u64s -= JSET_ENTRY_LOG_U64s;
321 static inline enum btree_insert_ret
322 btree_key_can_insert(struct btree_trans *trans,
326 struct bch_fs *c = trans->c;
328 if (!bch2_btree_node_insert_fits(c, b, u64s))
329 return BTREE_INSERT_BTREE_NODE_FULL;
331 return BTREE_INSERT_OK;
334 static enum btree_insert_ret
335 btree_key_can_insert_cached(struct btree_trans *trans,
336 struct btree_path *path,
339 struct bch_fs *c = trans->c;
340 struct bkey_cached *ck = (void *) path->l[0].b;
342 struct bkey_i *new_k;
344 EBUG_ON(path->level);
346 if (!test_bit(BKEY_CACHED_DIRTY, &ck->flags) &&
347 bch2_btree_key_cache_must_wait(c) &&
348 !(trans->flags & BTREE_INSERT_JOURNAL_RECLAIM))
349 return BTREE_INSERT_NEED_JOURNAL_RECLAIM;
352 * bch2_varint_decode can read past the end of the buffer by at most 7
353 * bytes (it won't be used):
357 if (u64s <= ck->u64s)
358 return BTREE_INSERT_OK;
360 new_u64s = roundup_pow_of_two(u64s);
361 new_k = krealloc(ck->k, new_u64s * sizeof(u64), GFP_NOFS);
363 bch_err(c, "error allocating memory for key cache key, btree %s u64s %u",
364 bch2_btree_ids[path->btree_id], new_u64s);
370 return BTREE_INSERT_OK;
373 static inline void do_btree_insert_one(struct btree_trans *trans,
374 struct btree_insert_entry *i)
376 struct bch_fs *c = trans->c;
377 struct journal *j = &c->journal;
380 EBUG_ON(trans->journal_res.ref !=
381 !(trans->flags & BTREE_INSERT_JOURNAL_REPLAY));
383 i->k->k.needs_whiteout = false;
385 did_work = !i->cached
386 ? btree_insert_key_leaf(trans, i)
387 : bch2_btree_insert_key_cached(trans, i->path, i->k);
391 if (likely(!(trans->flags & BTREE_INSERT_JOURNAL_REPLAY))) {
392 bch2_journal_add_keys(j, &trans->journal_res,
397 if (trans->journal_seq)
398 *trans->journal_seq = trans->journal_res.seq;
402 static noinline int bch2_trans_mark_gc(struct btree_trans *trans)
404 struct bch_fs *c = trans->c;
405 struct btree_insert_entry *i;
408 trans_for_each_update(trans, i) {
410 * XXX: synchronization of cached update triggers with gc
411 * XXX: synchronization of interior node updates with gc
413 BUG_ON(i->cached || i->level);
415 if (gc_visited(c, gc_pos_btree_node(insert_l(i)->b))) {
416 ret = bch2_mark_update(trans, i->path, i->k,
417 i->flags|BTREE_TRIGGER_GC);
427 bch2_trans_commit_write_locked(struct btree_trans *trans,
428 struct btree_insert_entry **stopped_at,
429 unsigned long trace_ip)
431 struct bch_fs *c = trans->c;
432 struct btree_insert_entry *i;
433 struct btree_trans_commit_hook *h;
435 bool marking = false;
439 trace_trans_restart_fault_inject(trans->fn, trace_ip);
440 trans->restarted = true;
445 * Check if the insert will fit in the leaf node with the write lock
446 * held, otherwise another thread could write the node changing the
447 * amount of space available:
450 prefetch(&trans->c->journal.flags);
454 ret = h->fn(trans, h);
460 trans_for_each_update(trans, i) {
461 /* Multiple inserts might go to same leaf: */
462 if (!same_leaf_as_prev(trans, i))
465 u64s += i->k->k.u64s;
467 ? btree_key_can_insert(trans, insert_l(i)->b, u64s)
468 : btree_key_can_insert_cached(trans, i->path, u64s);
474 if (btree_node_type_needs_gc(i->bkey_type))
479 * Don't get journal reservation until after we know insert will
482 if (likely(!(trans->flags & BTREE_INSERT_JOURNAL_REPLAY))) {
483 ret = bch2_trans_journal_res_get(trans,
484 JOURNAL_RES_GET_NONBLOCK);
488 if (unlikely(trans->journal_transaction_names))
489 journal_transaction_name(trans);
491 trans->journal_res.seq = c->journal.replay_journal_seq;
494 if (unlikely(trans->extra_journal_entry_u64s)) {
495 memcpy_u64s_small(journal_res_entry(&c->journal, &trans->journal_res),
496 trans->extra_journal_entries,
497 trans->extra_journal_entry_u64s);
499 trans->journal_res.offset += trans->extra_journal_entry_u64s;
500 trans->journal_res.u64s -= trans->extra_journal_entry_u64s;
504 * Not allowed to fail after we've gotten our journal reservation - we
508 if (!(trans->flags & BTREE_INSERT_JOURNAL_REPLAY)) {
509 if (bch2_journal_seq_verify)
510 trans_for_each_update(trans, i)
511 i->k->k.version.lo = trans->journal_res.seq;
512 else if (bch2_inject_invalid_keys)
513 trans_for_each_update(trans, i)
514 i->k->k.version = MAX_VERSION;
517 if (trans->fs_usage_deltas &&
518 bch2_trans_fs_usage_apply(trans, trans->fs_usage_deltas))
519 return BTREE_INSERT_NEED_MARK_REPLICAS;
521 trans_for_each_update(trans, i)
522 if (BTREE_NODE_TYPE_HAS_MEM_TRIGGERS & (1U << i->bkey_type)) {
523 ret = bch2_mark_update(trans, i->path, i->k, i->flags);
528 if (unlikely(c->gc_pos.phase)) {
529 ret = bch2_trans_mark_gc(trans);
534 trans_for_each_update(trans, i)
535 do_btree_insert_one(trans, i);
540 static inline void path_upgrade_readers(struct btree_trans *trans, struct btree_path *path)
544 for (l = 0; l < BTREE_MAX_DEPTH; l++)
545 if (btree_node_read_locked(path, l))
546 BUG_ON(!bch2_btree_node_upgrade(trans, path, l));
549 static inline void upgrade_readers(struct btree_trans *trans, struct btree_path *path)
551 struct btree *b = path_l(path)->b;
554 if (path->nodes_locked &&
555 path->nodes_locked != path->nodes_intent_locked)
556 path_upgrade_readers(trans, path);
557 } while ((path = prev_btree_path(trans, path)) &&
558 path_l(path)->b == b);
562 * Check for nodes that we have both read and intent locks on, and upgrade the
565 static inline void normalize_read_intent_locks(struct btree_trans *trans)
567 struct btree_path *path;
568 unsigned i, nr_read = 0, nr_intent = 0;
570 trans_for_each_path_inorder(trans, path, i) {
571 struct btree_path *next = i + 1 < trans->nr_sorted
572 ? trans->paths + trans->sorted[i + 1]
575 if (path->nodes_locked) {
576 if (path->nodes_intent_locked)
582 if (!next || path_l(path)->b != path_l(next)->b) {
583 if (nr_read && nr_intent)
584 upgrade_readers(trans, path);
586 nr_read = nr_intent = 0;
590 bch2_trans_verify_locks(trans);
593 static inline bool have_conflicting_read_lock(struct btree_trans *trans, struct btree_path *pos)
595 struct btree_path *path;
598 trans_for_each_path_inorder(trans, path, i) {
602 if (path->nodes_locked != path->nodes_intent_locked &&
603 !bch2_btree_path_upgrade(trans, path, path->level + 1))
610 static inline int trans_lock_write(struct btree_trans *trans)
612 struct btree_insert_entry *i;
614 trans_for_each_update(trans, i) {
615 if (same_leaf_as_prev(trans, i))
618 if (!six_trylock_write(&insert_l(i)->b->c.lock)) {
619 if (have_conflicting_read_lock(trans, i->path))
622 __btree_node_lock_type(trans->c, insert_l(i)->b,
626 bch2_btree_node_prep_for_write(trans, i->path, insert_l(i)->b);
631 while (--i >= trans->updates) {
632 if (same_leaf_as_prev(trans, i))
635 bch2_btree_node_unlock_write_inlined(trans, i->path, insert_l(i)->b);
638 trace_trans_restart_would_deadlock_write(trans->fn);
639 return btree_trans_restart(trans);
642 static noinline void bch2_drop_overwrites_from_journal(struct btree_trans *trans)
644 struct btree_insert_entry *i;
646 trans_for_each_update(trans, i)
647 bch2_journal_key_overwritten(trans->c, i->btree_id, i->level, i->k->k.p);
651 * Get journal reservation, take write locks, and attempt to do btree update(s):
653 static inline int do_bch2_trans_commit(struct btree_trans *trans,
654 struct btree_insert_entry **stopped_at,
655 unsigned long trace_ip)
657 struct bch_fs *c = trans->c;
658 struct btree_insert_entry *i;
660 int ret, u64s_delta = 0;
662 trans_for_each_update(trans, i) {
663 const char *invalid = bch2_bkey_invalid(c,
664 bkey_i_to_s_c(i->k), i->bkey_type);
668 bch2_bkey_val_to_text(&PBUF(buf), c, bkey_i_to_s_c(i->k));
669 bch2_fs_fatal_error(c, "invalid bkey %s on insert from %s -> %ps: %s\n",
670 buf, trans->fn, (void *) i->ip_allocated, invalid);
673 btree_insert_entry_checks(trans, i);
676 trans_for_each_update(trans, i) {
680 * peek_slot() doesn't yet work on iterators that point to
683 if (i->cached || i->level)
686 old = bch2_btree_path_peek_slot(i->path, &u);
691 u64s_delta += !bkey_deleted(&i->k->k) ? i->k->k.u64s : 0;
692 u64s_delta -= !bkey_deleted(old.k) ? old.k->u64s : 0;
694 if (!same_leaf_as_next(trans, i)) {
695 if (u64s_delta <= 0) {
696 ret = bch2_foreground_maybe_merge(trans, i->path,
697 i->level, trans->flags);
706 ret = bch2_journal_preres_get(&c->journal,
707 &trans->journal_preres, trans->journal_preres_u64s,
708 JOURNAL_RES_GET_NONBLOCK|
709 ((trans->flags & BTREE_INSERT_JOURNAL_RESERVED)
710 ? JOURNAL_RES_GET_RESERVED : 0));
711 if (unlikely(ret == -EAGAIN))
712 ret = bch2_trans_journal_preres_get_cold(trans,
713 trans->journal_preres_u64s, trace_ip);
717 normalize_read_intent_locks(trans);
719 ret = trans_lock_write(trans);
723 ret = bch2_trans_commit_write_locked(trans, stopped_at, trace_ip);
725 if (!ret && unlikely(!test_bit(JOURNAL_REPLAY_DONE, &c->journal.flags)))
726 bch2_drop_overwrites_from_journal(trans);
728 trans_for_each_update(trans, i)
729 if (!same_leaf_as_prev(trans, i))
730 bch2_btree_node_unlock_write_inlined(trans, i->path,
733 if (!ret && trans->journal_pin)
734 bch2_journal_pin_add(&c->journal, trans->journal_res.seq,
735 trans->journal_pin, NULL);
738 * Drop journal reservation after dropping write locks, since dropping
739 * the journal reservation may kick off a journal write:
741 bch2_journal_res_put(&c->journal, &trans->journal_res);
746 bch2_trans_downgrade(trans);
751 static int journal_reclaim_wait_done(struct bch_fs *c)
753 int ret = bch2_journal_error(&c->journal) ?:
754 !bch2_btree_key_cache_must_wait(c);
757 journal_reclaim_kick(&c->journal);
762 int bch2_trans_commit_error(struct btree_trans *trans,
763 struct btree_insert_entry *i,
764 int ret, unsigned long trace_ip)
766 struct bch_fs *c = trans->c;
769 case BTREE_INSERT_BTREE_NODE_FULL:
770 ret = bch2_btree_split_leaf(trans, i->path, trans->flags);
775 trace_trans_restart_btree_node_split(trans->fn, trace_ip,
776 i->btree_id, &i->path->pos);
778 case BTREE_INSERT_NEED_MARK_REPLICAS:
779 bch2_trans_unlock(trans);
781 ret = bch2_replicas_delta_list_mark(c, trans->fs_usage_deltas);
785 if (bch2_trans_relock(trans))
788 trace_trans_restart_mark_replicas(trans->fn, trace_ip);
791 case BTREE_INSERT_NEED_JOURNAL_RES:
792 bch2_trans_unlock(trans);
794 if ((trans->flags & BTREE_INSERT_JOURNAL_RECLAIM) &&
795 !(trans->flags & BTREE_INSERT_JOURNAL_RESERVED)) {
796 trans->restarted = true;
801 ret = bch2_trans_journal_res_get(trans, JOURNAL_RES_GET_CHECK);
805 if (bch2_trans_relock(trans))
808 trace_trans_restart_journal_res_get(trans->fn, trace_ip);
811 case BTREE_INSERT_NEED_JOURNAL_RECLAIM:
812 bch2_trans_unlock(trans);
814 trace_trans_blocked_journal_reclaim(trans->fn, trace_ip);
816 wait_event_freezable(c->journal.reclaim_wait,
817 (ret = journal_reclaim_wait_done(c)));
821 if (bch2_trans_relock(trans))
824 trace_trans_restart_journal_reclaim(trans->fn, trace_ip);
832 BUG_ON((ret == EINTR || ret == -EAGAIN) && !trans->restarted);
833 BUG_ON(ret == -ENOSPC &&
834 !(trans->flags & BTREE_INSERT_NOWAIT) &&
835 (trans->flags & BTREE_INSERT_NOFAIL));
841 bch2_trans_commit_get_rw_cold(struct btree_trans *trans)
843 struct bch_fs *c = trans->c;
846 if (likely(!(trans->flags & BTREE_INSERT_LAZY_RW)) ||
847 test_bit(BCH_FS_STARTED, &c->flags))
850 bch2_trans_unlock(trans);
852 ret = bch2_fs_read_write_early(c);
856 if (!bch2_trans_relock(trans))
859 percpu_ref_get(&c->writes);
863 static int run_one_trigger(struct btree_trans *trans, struct btree_insert_entry *i,
866 struct bkey _deleted = KEY(0, 0, 0);
867 struct bkey_s_c deleted = (struct bkey_s_c) { &_deleted, NULL };
869 struct bkey unpacked;
872 if ((i->flags & BTREE_TRIGGER_NORUN) ||
873 !(BTREE_NODE_TYPE_HAS_TRANS_TRIGGERS & (1U << i->bkey_type)))
877 if (i->insert_trigger_run)
880 BUG_ON(i->overwrite_trigger_run);
881 i->insert_trigger_run = true;
883 if (i->overwrite_trigger_run)
886 BUG_ON(!i->insert_trigger_run);
887 i->overwrite_trigger_run = true;
890 old = bch2_btree_path_peek_slot(i->path, &unpacked);
891 _deleted.p = i->path->pos;
894 ret = bch2_trans_mark_key(trans, old, deleted,
895 BTREE_TRIGGER_OVERWRITE|i->flags);
896 } else if (old.k->type == i->k->k.type &&
897 ((1U << old.k->type) & BTREE_TRIGGER_WANTS_OLD_AND_NEW)) {
898 i->overwrite_trigger_run = true;
899 ret = bch2_trans_mark_key(trans, old, bkey_i_to_s_c(i->k),
900 BTREE_TRIGGER_INSERT|BTREE_TRIGGER_OVERWRITE|i->flags);
902 ret = bch2_trans_mark_key(trans, deleted, bkey_i_to_s_c(i->k),
903 BTREE_TRIGGER_INSERT|i->flags);
907 trace_trans_restart_mark(trans->fn, _RET_IP_,
908 i->btree_id, &i->path->pos);
912 static int run_btree_triggers(struct btree_trans *trans, enum btree_id btree_id,
913 struct btree_insert_entry *btree_id_start)
915 struct btree_insert_entry *i;
916 bool trans_trigger_run;
919 for (overwrite = 0; overwrite < 2; overwrite++) {
922 * Running triggers will append more updates to the list of updates as
926 trans_trigger_run = false;
928 for (i = btree_id_start;
929 i < trans->updates + trans->nr_updates && i->btree_id <= btree_id;
931 ret = run_one_trigger(trans, i, overwrite);
935 trans_trigger_run = true;
937 } while (trans_trigger_run);
943 static int bch2_trans_commit_run_triggers(struct btree_trans *trans)
945 struct btree_insert_entry *i = NULL, *btree_id_start = trans->updates;
946 unsigned btree_id = 0;
951 * For a given btree, this algorithm runs insert triggers before
952 * overwrite triggers: this is so that when extents are being moved
953 * (e.g. by FALLOCATE_FL_INSERT_RANGE), we don't drop references before
956 for (btree_id = 0; btree_id < BTREE_ID_NR; btree_id++) {
957 while (btree_id_start < trans->updates + trans->nr_updates &&
958 btree_id_start->btree_id < btree_id)
961 ret = run_btree_triggers(trans, btree_id, btree_id_start);
966 trans_for_each_update(trans, i)
967 BUG_ON(!(i->flags & BTREE_TRIGGER_NORUN) &&
968 (BTREE_NODE_TYPE_HAS_TRANS_TRIGGERS & (1U << i->bkey_type)) &&
969 (!i->insert_trigger_run || !i->overwrite_trigger_run));
974 int __bch2_trans_commit(struct btree_trans *trans)
976 struct bch_fs *c = trans->c;
977 struct btree_insert_entry *i = NULL;
981 if (!trans->nr_updates &&
982 !trans->extra_journal_entry_u64s)
985 if (trans->flags & BTREE_INSERT_GC_LOCK_HELD)
986 lockdep_assert_held(&c->gc_lock);
988 memset(&trans->journal_preres, 0, sizeof(trans->journal_preres));
990 trans->journal_u64s = trans->extra_journal_entry_u64s;
991 trans->journal_preres_u64s = 0;
993 trans->journal_transaction_names = READ_ONCE(c->opts.journal_transaction_names);
995 if (trans->journal_transaction_names)
996 trans->journal_u64s += JSET_ENTRY_LOG_U64s;
998 if (!(trans->flags & BTREE_INSERT_NOCHECK_RW) &&
999 unlikely(!percpu_ref_tryget(&c->writes))) {
1000 ret = bch2_trans_commit_get_rw_cold(trans);
1005 #ifdef CONFIG_BCACHEFS_DEBUG
1007 * if BTREE_TRIGGER_NORUN is set, it means we're probably being called
1008 * from the key cache flush code:
1010 trans_for_each_update(trans, i)
1012 !(i->flags & BTREE_TRIGGER_NORUN))
1013 bch2_btree_key_cache_verify_clean(trans,
1014 i->btree_id, i->k->k.p);
1017 ret = bch2_trans_commit_run_triggers(trans);
1021 trans_for_each_update(trans, i) {
1022 BUG_ON(!i->path->should_be_locked);
1024 if (unlikely(!bch2_btree_path_upgrade(trans, i->path, i->level + 1))) {
1025 trace_trans_restart_upgrade(trans->fn, _RET_IP_,
1026 i->btree_id, &i->path->pos);
1027 ret = btree_trans_restart(trans);
1031 BUG_ON(!btree_node_intent_locked(i->path, i->level));
1033 u64s = jset_u64s(i->k->k.u64s);
1035 likely(!(trans->flags & BTREE_INSERT_JOURNAL_REPLAY)))
1036 trans->journal_preres_u64s += u64s;
1037 trans->journal_u64s += u64s;
1040 if (trans->extra_journal_res) {
1041 ret = bch2_disk_reservation_add(c, trans->disk_res,
1042 trans->extra_journal_res,
1043 (trans->flags & BTREE_INSERT_NOFAIL)
1044 ? BCH_DISK_RESERVATION_NOFAIL : 0);
1049 BUG_ON(trans->restarted);
1050 memset(&trans->journal_res, 0, sizeof(trans->journal_res));
1052 ret = do_bch2_trans_commit(trans, &i, _RET_IP_);
1054 /* make sure we didn't drop or screw up locks: */
1055 bch2_trans_verify_locks(trans);
1060 bch2_journal_preres_put(&c->journal, &trans->journal_preres);
1062 if (likely(!(trans->flags & BTREE_INSERT_NOCHECK_RW)))
1063 percpu_ref_put(&c->writes);
1065 trans_for_each_update(trans, i)
1066 bch2_path_put(trans, i->path, true);
1068 trans->extra_journal_res = 0;
1069 trans->nr_updates = 0;
1070 trans->hooks = NULL;
1071 trans->extra_journal_entries = NULL;
1072 trans->extra_journal_entry_u64s = 0;
1074 if (trans->fs_usage_deltas) {
1075 trans->fs_usage_deltas->used = 0;
1076 memset(&trans->fs_usage_deltas->memset_start, 0,
1077 (void *) &trans->fs_usage_deltas->memset_end -
1078 (void *) &trans->fs_usage_deltas->memset_start);
1083 ret = bch2_trans_commit_error(trans, i, ret, _RET_IP_);
1090 static int check_pos_snapshot_overwritten(struct btree_trans *trans,
1094 struct bch_fs *c = trans->c;
1095 struct btree_iter iter;
1099 if (!btree_type_has_snapshots(id))
1102 if (!snapshot_t(c, pos.snapshot)->children[0])
1105 bch2_trans_iter_init(trans, &iter, id, pos,
1106 BTREE_ITER_NOT_EXTENTS|
1107 BTREE_ITER_ALL_SNAPSHOTS);
1109 k = bch2_btree_iter_prev(&iter);
1117 if (bkey_cmp(pos, k.k->p))
1120 if (bch2_snapshot_is_ancestor(c, k.k->p.snapshot, pos.snapshot)) {
1125 bch2_trans_iter_exit(trans, &iter);
1130 int bch2_trans_update_extent(struct btree_trans *trans,
1131 struct btree_iter *orig_iter,
1132 struct bkey_i *insert,
1133 enum btree_update_flags flags)
1135 struct bch_fs *c = trans->c;
1136 struct btree_iter iter, update_iter;
1137 struct bpos start = bkey_start_pos(&insert->k);
1138 struct bkey_i *update;
1140 enum btree_id btree_id = orig_iter->btree_id;
1141 int ret = 0, compressed_sectors;
1143 bch2_trans_iter_init(trans, &iter, btree_id, start,
1145 BTREE_ITER_WITH_UPDATES|
1146 BTREE_ITER_NOT_EXTENTS);
1147 k = bch2_btree_iter_peek(&iter);
1148 if ((ret = bkey_err(k)))
1153 if (bch2_bkey_maybe_mergable(k.k, &insert->k)) {
1155 * We can't merge extents if they belong to interior snapshot
1156 * tree nodes, and there's a snapshot in which one extent is
1157 * visible and the other is not - i.e. if visibility is
1160 * Instead of checking if visibilitiy of the two extents is
1161 * different, for now we just check if either has been
1164 ret = check_pos_snapshot_overwritten(trans, btree_id, insert->k.p);
1170 ret = check_pos_snapshot_overwritten(trans, btree_id, k.k->p);
1176 update = bch2_trans_kmalloc(trans, bkey_bytes(k.k));
1177 if ((ret = PTR_ERR_OR_ZERO(update)))
1180 bkey_reassemble(update, k);
1182 if (bch2_bkey_merge(c, bkey_i_to_s(update), bkey_i_to_s_c(insert))) {
1183 ret = bch2_btree_delete_at(trans, &iter, flags);
1193 if (!bkey_cmp(k.k->p, start))
1196 while (bkey_cmp(insert->k.p, bkey_start_pos(k.k)) > 0) {
1197 bool front_split = bkey_cmp(bkey_start_pos(k.k), start) < 0;
1198 bool back_split = bkey_cmp(k.k->p, insert->k.p) > 0;
1201 * If we're going to be splitting a compressed extent, note it
1202 * so that __bch2_trans_commit() can increase our disk
1205 if (((front_split && back_split) ||
1206 ((front_split || back_split) && k.k->p.snapshot != insert->k.p.snapshot)) &&
1207 (compressed_sectors = bch2_bkey_sectors_compressed(k)))
1208 trans->extra_journal_res += compressed_sectors;
1211 update = bch2_trans_kmalloc(trans, bkey_bytes(k.k));
1212 if ((ret = PTR_ERR_OR_ZERO(update)))
1215 bkey_reassemble(update, k);
1217 bch2_cut_back(start, update);
1219 bch2_trans_iter_init(trans, &update_iter, btree_id, update->k.p,
1220 BTREE_ITER_NOT_EXTENTS|
1221 BTREE_ITER_ALL_SNAPSHOTS|
1223 ret = bch2_btree_iter_traverse(&update_iter) ?:
1224 bch2_trans_update(trans, &update_iter, update,
1225 BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|
1227 bch2_trans_iter_exit(trans, &update_iter);
1233 if (k.k->p.snapshot != insert->k.p.snapshot &&
1234 (front_split || back_split)) {
1235 update = bch2_trans_kmalloc(trans, bkey_bytes(k.k));
1236 if ((ret = PTR_ERR_OR_ZERO(update)))
1239 bkey_reassemble(update, k);
1241 bch2_cut_front(start, update);
1242 bch2_cut_back(insert->k.p, update);
1244 bch2_trans_iter_init(trans, &update_iter, btree_id, update->k.p,
1245 BTREE_ITER_NOT_EXTENTS|
1246 BTREE_ITER_ALL_SNAPSHOTS|
1248 ret = bch2_btree_iter_traverse(&update_iter) ?:
1249 bch2_trans_update(trans, &update_iter, update,
1250 BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|
1252 bch2_trans_iter_exit(trans, &update_iter);
1257 if (bkey_cmp(k.k->p, insert->k.p) <= 0) {
1258 update = bch2_trans_kmalloc(trans, sizeof(*update));
1259 if ((ret = PTR_ERR_OR_ZERO(update)))
1262 bkey_init(&update->k);
1263 update->k.p = k.k->p;
1265 if (insert->k.p.snapshot != k.k->p.snapshot) {
1266 update->k.p.snapshot = insert->k.p.snapshot;
1267 update->k.type = KEY_TYPE_whiteout;
1270 bch2_trans_iter_init(trans, &update_iter, btree_id, update->k.p,
1271 BTREE_ITER_NOT_EXTENTS|
1273 ret = bch2_btree_iter_traverse(&update_iter) ?:
1274 bch2_trans_update(trans, &update_iter, update,
1275 BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|
1277 bch2_trans_iter_exit(trans, &update_iter);
1284 update = bch2_trans_kmalloc(trans, bkey_bytes(k.k));
1285 if ((ret = PTR_ERR_OR_ZERO(update)))
1288 bkey_reassemble(update, k);
1289 bch2_cut_front(insert->k.p, update);
1291 ret = bch2_trans_update_by_path(trans, iter.path, update,
1292 BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|
1299 k = bch2_btree_iter_next(&iter);
1300 if ((ret = bkey_err(k)))
1306 if (bch2_bkey_maybe_mergable(&insert->k, k.k)) {
1307 ret = check_pos_snapshot_overwritten(trans, btree_id, insert->k.p);
1313 ret = check_pos_snapshot_overwritten(trans, btree_id, k.k->p);
1319 bch2_bkey_merge(c, bkey_i_to_s(insert), k);
1324 if (!bkey_deleted(&insert->k)) {
1326 * Rewinding iterators is expensive: get a new one and the one
1327 * that points to the start of insert will be cloned from:
1329 bch2_trans_iter_exit(trans, &iter);
1330 bch2_trans_iter_init(trans, &iter, btree_id, insert->k.p,
1331 BTREE_ITER_NOT_EXTENTS|
1333 ret = bch2_btree_iter_traverse(&iter) ?:
1334 bch2_trans_update(trans, &iter, insert, flags);
1337 bch2_trans_iter_exit(trans, &iter);
1343 * When deleting, check if we need to emit a whiteout (because we're overwriting
1344 * something in an ancestor snapshot)
1346 static int need_whiteout_for_snapshot(struct btree_trans *trans,
1347 enum btree_id btree_id, struct bpos pos)
1349 struct btree_iter iter;
1351 u32 snapshot = pos.snapshot;
1354 if (!bch2_snapshot_parent(trans->c, pos.snapshot))
1359 for_each_btree_key_norestart(trans, iter, btree_id, pos,
1360 BTREE_ITER_ALL_SNAPSHOTS|
1361 BTREE_ITER_NOPRESERVE, k, ret) {
1362 if (bkey_cmp(k.k->p, pos))
1365 if (bch2_snapshot_is_ancestor(trans->c, snapshot,
1367 ret = !bkey_whiteout(k.k);
1371 bch2_trans_iter_exit(trans, &iter);
1376 static int __must_check
1377 bch2_trans_update_by_path(struct btree_trans *trans, struct btree_path *path,
1378 struct bkey_i *k, enum btree_update_flags flags)
1380 struct btree_insert_entry *i, n;
1382 BUG_ON(!path->should_be_locked);
1384 BUG_ON(trans->nr_updates >= BTREE_ITER_MAX);
1385 BUG_ON(bpos_cmp(k->k.p, path->pos));
1387 n = (struct btree_insert_entry) {
1389 .bkey_type = __btree_node_type(path->level, path->btree_id),
1390 .btree_id = path->btree_id,
1391 .level = path->level,
1392 .cached = path->cached,
1395 .ip_allocated = _RET_IP_,
1398 #ifdef CONFIG_BCACHEFS_DEBUG
1399 trans_for_each_update(trans, i)
1400 BUG_ON(i != trans->updates &&
1401 btree_insert_entry_cmp(i - 1, i) >= 0);
1405 * Pending updates are kept sorted: first, find position of new update,
1406 * then delete/trim any updates the new update overwrites:
1408 trans_for_each_update(trans, i)
1409 if (btree_insert_entry_cmp(&n, i) <= 0)
1412 if (i < trans->updates + trans->nr_updates &&
1413 !btree_insert_entry_cmp(&n, i)) {
1414 BUG_ON(i->insert_trigger_run || i->overwrite_trigger_run);
1416 bch2_path_put(trans, i->path, true);
1419 array_insert_item(trans->updates, trans->nr_updates,
1420 i - trans->updates, n);
1422 __btree_path_get(n.path, true);
1426 int __must_check bch2_trans_update(struct btree_trans *trans, struct btree_iter *iter,
1427 struct bkey_i *k, enum btree_update_flags flags)
1429 struct btree_path *path = iter->update_path ?: iter->path;
1430 struct bkey_cached *ck;
1433 if (iter->flags & BTREE_ITER_IS_EXTENTS)
1434 return bch2_trans_update_extent(trans, iter, k, flags);
1436 if (bkey_deleted(&k->k) &&
1437 !(flags & BTREE_UPDATE_KEY_CACHE_RECLAIM) &&
1438 (iter->flags & BTREE_ITER_FILTER_SNAPSHOTS)) {
1439 ret = need_whiteout_for_snapshot(trans, iter->btree_id, k->k.p);
1440 if (unlikely(ret < 0))
1444 k->k.type = KEY_TYPE_whiteout;
1447 if (!(flags & BTREE_UPDATE_KEY_CACHE_RECLAIM) &&
1450 btree_id_cached(trans->c, path->btree_id)) {
1451 if (!iter->key_cache_path ||
1452 !iter->key_cache_path->should_be_locked ||
1453 bpos_cmp(iter->key_cache_path->pos, k->k.p)) {
1454 if (!iter->key_cache_path)
1455 iter->key_cache_path =
1456 bch2_path_get(trans, path->btree_id, path->pos, 1, 0,
1458 BTREE_ITER_CACHED, _THIS_IP_);
1460 iter->key_cache_path =
1461 bch2_btree_path_set_pos(trans, iter->key_cache_path, path->pos,
1462 iter->flags & BTREE_ITER_INTENT,
1465 ret = bch2_btree_path_traverse(trans, iter->key_cache_path,
1467 BTREE_ITER_CACHED_NOFILL);
1471 ck = (void *) iter->key_cache_path->l[0].b;
1473 if (test_bit(BKEY_CACHED_DIRTY, &ck->flags)) {
1474 trace_trans_restart_key_cache_raced(trans->fn, _RET_IP_);
1475 btree_trans_restart(trans);
1479 iter->key_cache_path->should_be_locked = true;
1482 path = iter->key_cache_path;
1485 return bch2_trans_update_by_path(trans, path, k, flags);
1488 void bch2_trans_commit_hook(struct btree_trans *trans,
1489 struct btree_trans_commit_hook *h)
1491 h->next = trans->hooks;
1495 int __bch2_btree_insert(struct btree_trans *trans,
1496 enum btree_id id, struct bkey_i *k)
1498 struct btree_iter iter;
1501 bch2_trans_iter_init(trans, &iter, id, bkey_start_pos(&k->k),
1503 ret = bch2_btree_iter_traverse(&iter) ?:
1504 bch2_trans_update(trans, &iter, k, 0);
1505 bch2_trans_iter_exit(trans, &iter);
1510 * bch2_btree_insert - insert keys into the extent btree
1511 * @c: pointer to struct bch_fs
1512 * @id: btree to insert into
1513 * @insert_keys: list of keys to insert
1514 * @hook: insert callback
1516 int bch2_btree_insert(struct bch_fs *c, enum btree_id id,
1518 struct disk_reservation *disk_res,
1519 u64 *journal_seq, int flags)
1521 return bch2_trans_do(c, disk_res, journal_seq, flags,
1522 __bch2_btree_insert(&trans, id, k));
1525 int bch2_btree_delete_at(struct btree_trans *trans,
1526 struct btree_iter *iter, unsigned update_flags)
1530 k = bch2_trans_kmalloc(trans, sizeof(*k));
1536 return bch2_trans_update(trans, iter, k, update_flags);
1539 int bch2_btree_delete_range_trans(struct btree_trans *trans, enum btree_id id,
1540 struct bpos start, struct bpos end,
1541 unsigned iter_flags,
1544 struct btree_iter iter;
1548 bch2_trans_iter_init(trans, &iter, id, start, BTREE_ITER_INTENT|iter_flags);
1550 while ((bch2_trans_begin(trans),
1551 (k = bch2_btree_iter_peek(&iter)).k) &&
1552 !(ret = bkey_err(k)) &&
1553 bkey_cmp(iter.pos, end) < 0) {
1554 struct disk_reservation disk_res =
1555 bch2_disk_reservation_init(trans->c, 0);
1556 struct bkey_i delete;
1558 bkey_init(&delete.k);
1561 * This could probably be more efficient for extents:
1565 * For extents, iter.pos won't necessarily be the same as
1566 * bkey_start_pos(k.k) (for non extents they always will be the
1567 * same). It's important that we delete starting from iter.pos
1568 * because the range we want to delete could start in the middle
1571 * (bch2_btree_iter_peek() does guarantee that iter.pos >=
1572 * bkey_start_pos(k.k)).
1574 delete.k.p = iter.pos;
1576 if (iter.flags & BTREE_ITER_IS_EXTENTS) {
1577 unsigned max_sectors =
1578 KEY_SIZE_MAX & (~0 << trans->c->block_bits);
1580 /* create the biggest key we can */
1581 bch2_key_resize(&delete.k, max_sectors);
1582 bch2_cut_back(end, &delete);
1584 ret = bch2_extent_trim_atomic(trans, &iter, &delete);
1589 ret = bch2_trans_update(trans, &iter, &delete, 0) ?:
1590 bch2_trans_commit(trans, &disk_res, journal_seq,
1591 BTREE_INSERT_NOFAIL);
1592 bch2_disk_reservation_put(trans->c, &disk_res);
1597 if (ret == -EINTR) {
1602 bch2_trans_iter_exit(trans, &iter);
1607 * bch_btree_delete_range - delete everything within a given range
1609 * Range is a half open interval - [start, end)
1611 int bch2_btree_delete_range(struct bch_fs *c, enum btree_id id,
1612 struct bpos start, struct bpos end,
1613 unsigned iter_flags,
1616 return bch2_trans_do(c, NULL, journal_seq, 0,
1617 bch2_btree_delete_range_trans(&trans, id, start, end,
1618 iter_flags, journal_seq));