diff options
Diffstat (limited to 'fs/bcachefs/btree_update_interior.c')
| -rw-r--r-- | fs/bcachefs/btree_update_interior.c | 816 |
1 files changed, 302 insertions, 514 deletions
diff --git a/fs/bcachefs/btree_update_interior.c b/fs/bcachefs/btree_update_interior.c index 1867d732afd4..7d63c457a3bf 100644 --- a/fs/bcachefs/btree_update_interior.c +++ b/fs/bcachefs/btree_update_interior.c @@ -21,10 +21,6 @@ #include <linux/random.h> -static void btree_node_will_make_reachable(struct btree_update *, - struct btree *); -static void btree_update_drop_new_node(struct bch_fs *, struct btree *); - /* Debug code: */ /* @@ -124,74 +120,6 @@ bool bch2_btree_node_format_fits(struct bch_fs *c, struct btree *b, /* Btree node freeing/allocation: */ -static bool btree_key_matches(struct bch_fs *c, - struct bkey_s_c l, - struct bkey_s_c r) -{ - struct bkey_ptrs_c ptrs1 = bch2_bkey_ptrs_c(l); - struct bkey_ptrs_c ptrs2 = bch2_bkey_ptrs_c(r); - const struct bch_extent_ptr *ptr1, *ptr2; - - bkey_for_each_ptr(ptrs1, ptr1) - bkey_for_each_ptr(ptrs2, ptr2) - if (ptr1->dev == ptr2->dev && - ptr1->gen == ptr2->gen && - ptr1->offset == ptr2->offset) - return true; - - return false; -} - -/* - * We're doing the index update that makes @b unreachable, update stuff to - * reflect that: - * - * Must be called _before_ btree_update_updated_root() or - * btree_update_updated_node: - */ -static void bch2_btree_node_free_index(struct btree_update *as, struct btree *b, - struct bkey_s_c k, - struct bch_fs_usage *stats) -{ - struct bch_fs *c = as->c; - struct pending_btree_node_free *d; - - for (d = as->pending; d < as->pending + as->nr_pending; d++) - if (!bkey_cmp(k.k->p, d->key.k.p) && - btree_key_matches(c, k, bkey_i_to_s_c(&d->key))) - goto found; - BUG(); -found: - BUG_ON(d->index_update_done); - d->index_update_done = true; - - /* - * We're dropping @k from the btree, but it's still live until the - * index update is persistent so we need to keep a reference around for - * mark and sweep to find - that's primarily what the - * btree_node_pending_free list is for. - * - * So here (when we set index_update_done = true), we're moving an - * existing reference to a different part of the larger "gc keyspace" - - * and the new position comes after the old position, since GC marks - * the pending free list after it walks the btree. - * - * If we move the reference while mark and sweep is _between_ the old - * and the new position, mark and sweep will see the reference twice - * and it'll get double accounted - so check for that here and subtract - * to cancel out one of mark and sweep's markings if necessary: - */ - - if (gc_pos_cmp(c->gc_pos, b - ? gc_pos_btree_node(b) - : gc_pos_btree_root(as->btree_id)) >= 0 && - gc_pos_cmp(c->gc_pos, gc_phase(GC_PHASE_PENDING_DELETE)) < 0) - bch2_mark_key_locked(c, bkey_i_to_s_c(&d->key), - 0, 0, NULL, 0, - BTREE_TRIGGER_OVERWRITE| - BTREE_TRIGGER_GC); -} - static void __btree_node_free(struct bch_fs *c, struct btree *b) { trace_btree_node_free(c, b); @@ -216,8 +144,6 @@ void bch2_btree_node_free_never_inserted(struct bch_fs *c, struct btree *b) { struct open_buckets ob = b->ob; - btree_update_drop_new_node(c, b); - b->ob.nr = 0; clear_btree_node_dirty(b); @@ -237,39 +163,12 @@ void bch2_btree_node_free_inmem(struct bch_fs *c, struct btree *b, trans_for_each_iter(iter->trans, linked) BUG_ON(linked->l[b->c.level].b == b); - /* - * Is this a node that isn't reachable on disk yet? - * - * Nodes that aren't reachable yet have writes blocked until they're - * reachable - now that we've cancelled any pending writes and moved - * things waiting on that write to wait on this update, we can drop this - * node from the list of nodes that the other update is making - * reachable, prior to freeing it: - */ - btree_update_drop_new_node(c, b); - six_lock_write(&b->c.lock, NULL, NULL); __btree_node_free(c, b); six_unlock_write(&b->c.lock); six_unlock_intent(&b->c.lock); } -static void bch2_btree_node_free_ondisk(struct bch_fs *c, - struct pending_btree_node_free *pending, - u64 journal_seq) -{ - BUG_ON(!pending->index_update_done); - - bch2_mark_key(c, bkey_i_to_s_c(&pending->key), - 0, 0, NULL, journal_seq, BTREE_TRIGGER_OVERWRITE); - - if (gc_visited(c, gc_phase(GC_PHASE_PENDING_DELETE))) - bch2_mark_key(c, bkey_i_to_s_c(&pending->key), - 0, 0, NULL, journal_seq, - BTREE_TRIGGER_OVERWRITE| - BTREE_TRIGGER_GC); -} - static struct btree *__bch2_btree_node_alloc(struct bch_fs *c, struct disk_reservation *res, struct closure *cl, @@ -357,9 +256,9 @@ static struct btree *bch2_btree_node_alloc(struct btree_update *as, unsigned lev int ret; BUG_ON(level >= BTREE_MAX_DEPTH); - BUG_ON(!as->reserve->nr); + BUG_ON(!as->nr_prealloc_nodes); - b = as->reserve->b[--as->reserve->nr]; + b = as->prealloc_nodes[--as->nr_prealloc_nodes]; set_btree_node_accessed(b); set_btree_node_dirty(b); @@ -394,8 +293,6 @@ static struct btree *bch2_btree_node_alloc(struct btree_update *as, unsigned lev bch2_btree_build_aux_trees(b); - btree_node_will_make_reachable(as, b); - ret = bch2_btree_node_hash_insert(&c->btree_cache, b, level, as->btree_id); BUG_ON(ret); @@ -466,19 +363,20 @@ static struct btree *__btree_root_alloc(struct btree_update *as, unsigned level) btree_node_set_format(b, b->data->format); bch2_btree_build_aux_trees(b); + bch2_btree_update_add_new_node(as, b); six_unlock_write(&b->c.lock); return b; } -static void bch2_btree_reserve_put(struct bch_fs *c, struct btree_reserve *reserve) +static void bch2_btree_reserve_put(struct btree_update *as) { - bch2_disk_reservation_put(c, &reserve->disk_res); + struct bch_fs *c = as->c; mutex_lock(&c->btree_reserve_cache_lock); - while (reserve->nr) { - struct btree *b = reserve->b[--reserve->nr]; + while (as->nr_prealloc_nodes) { + struct btree *b = as->prealloc_nodes[--as->nr_prealloc_nodes]; six_unlock_write(&b->c.lock); @@ -502,36 +400,14 @@ static void bch2_btree_reserve_put(struct bch_fs *c, struct btree_reserve *reser } mutex_unlock(&c->btree_reserve_cache_lock); - - mempool_free(reserve, &c->btree_reserve_pool); } -static struct btree_reserve *bch2_btree_reserve_get(struct bch_fs *c, - unsigned nr_nodes, - unsigned flags, - struct closure *cl) +static int bch2_btree_reserve_get(struct btree_update *as, unsigned nr_nodes, + unsigned flags, struct closure *cl) { - struct btree_reserve *reserve; + struct bch_fs *c = as->c; struct btree *b; - struct disk_reservation disk_res = { 0, 0 }; - unsigned sectors = nr_nodes * c->opts.btree_node_size; - int ret, disk_res_flags = 0; - - if (flags & BTREE_INSERT_NOFAIL) - disk_res_flags |= BCH_DISK_RESERVATION_NOFAIL; - - /* - * This check isn't necessary for correctness - it's just to potentially - * prevent us from doing a lot of work that'll end up being wasted: - */ - ret = bch2_journal_error(&c->journal); - if (ret) - return ERR_PTR(ret); - - if (bch2_disk_reservation_get(c, &disk_res, sectors, - c->opts.metadata_replicas, - disk_res_flags)) - return ERR_PTR(-ENOSPC); + int ret; BUG_ON(nr_nodes > BTREE_RESERVE_MAX); @@ -540,18 +416,11 @@ static struct btree_reserve *bch2_btree_reserve_get(struct bch_fs *c, * open bucket reserve: */ ret = bch2_btree_cache_cannibalize_lock(c, cl); - if (ret) { - bch2_disk_reservation_put(c, &disk_res); - return ERR_PTR(ret); - } - - reserve = mempool_alloc(&c->btree_reserve_pool, GFP_NOIO); - - reserve->disk_res = disk_res; - reserve->nr = 0; + if (ret) + return ret; - while (reserve->nr < nr_nodes) { - b = __bch2_btree_node_alloc(c, &disk_res, + while (as->nr_prealloc_nodes < nr_nodes) { + b = __bch2_btree_node_alloc(c, &as->disk_res, flags & BTREE_INSERT_NOWAIT ? NULL : cl, flags); if (IS_ERR(b)) { @@ -563,21 +432,20 @@ static struct btree_reserve *bch2_btree_reserve_get(struct bch_fs *c, if (ret) goto err_free; - reserve->b[reserve->nr++] = b; + as->prealloc_nodes[as->nr_prealloc_nodes++] = b; } bch2_btree_cache_cannibalize_unlock(c); - return reserve; + return 0; err_free: - bch2_btree_reserve_put(c, reserve); bch2_btree_cache_cannibalize_unlock(c); trace_btree_reserve_get_fail(c, nr_nodes, cl); - return ERR_PTR(ret); + return ret; } /* Asynchronous interior node update machinery */ -static void __bch2_btree_update_free(struct btree_update *as) +static void bch2_btree_update_free(struct btree_update *as) { struct bch_fs *c = as->c; @@ -585,14 +453,13 @@ static void __bch2_btree_update_free(struct btree_update *as) bch2_journal_pin_drop(&c->journal, &as->journal); bch2_journal_pin_flush(&c->journal, &as->journal); + bch2_disk_reservation_put(c, &as->disk_res); + bch2_btree_reserve_put(as); - BUG_ON(as->nr_new_nodes || as->nr_pending); - - if (as->reserve) - bch2_btree_reserve_put(c, as->reserve); - + mutex_lock(&c->btree_interior_update_lock); list_del(&as->unwritten_list); list_del(&as->list); + mutex_unlock(&c->btree_interior_update_lock); closure_debug_destroy(&as->cl); mempool_free(as, &c->btree_interior_update_pool); @@ -600,37 +467,59 @@ static void __bch2_btree_update_free(struct btree_update *as) closure_wake_up(&c->btree_interior_update_wait); } -static void bch2_btree_update_free(struct btree_update *as) +static void btree_update_will_delete_key(struct btree_update *as, + struct bkey_i *k) { - struct bch_fs *c = as->c; + BUG_ON(bch2_keylist_u64s(&as->old_keys) + k->k.u64s > + ARRAY_SIZE(as->_old_keys)); + bch2_keylist_add(&as->old_keys, k); +} - mutex_lock(&c->btree_interior_update_lock); - __bch2_btree_update_free(as); - mutex_unlock(&c->btree_interior_update_lock); +static void btree_update_will_add_key(struct btree_update *as, + struct bkey_i *k) +{ + BUG_ON(bch2_keylist_u64s(&as->new_keys) + k->k.u64s > + ARRAY_SIZE(as->_new_keys)); + bch2_keylist_add(&as->new_keys, k); } -static inline bool six_trylock_intentwrite(struct six_lock *lock) +/* + * The transactional part of an interior btree node update, where we journal the + * update we did to the interior node and update alloc info: + */ +static int btree_update_nodes_written_trans(struct btree_trans *trans, + struct btree_update *as) { - if (!six_trylock_intent(lock)) - return false; + struct bkey_i *k; + int ret; + + trans->extra_journal_entries = (void *) &as->journal_entries[0]; + trans->extra_journal_entry_u64s = as->journal_u64s; + trans->journal_pin = &as->journal; - if (!six_trylock_write(lock)) { - six_unlock_intent(lock); - return false; + for_each_keylist_key(&as->new_keys, k) { + ret = bch2_trans_mark_key(trans, bkey_i_to_s_c(k), + 0, 0, BTREE_TRIGGER_INSERT); + if (ret) + return ret; } - return true; + for_each_keylist_key(&as->old_keys, k) { + ret = bch2_trans_mark_key(trans, bkey_i_to_s_c(k), + 0, 0, BTREE_TRIGGER_OVERWRITE); + if (ret) + return ret; + } + + return 0; } -static void btree_update_nodes_written(struct closure *cl) +static void btree_update_nodes_written(struct btree_update *as) { - struct btree_update *as = container_of(cl, struct btree_update, cl); - struct btree *nodes_need_write[BTREE_MAX_DEPTH * 2 + GC_MERGE_NODES + 1]; - unsigned nr_nodes_need_write; - struct journal_res res = { 0 }; struct bch_fs *c = as->c; - struct btree_root *r; - struct btree *b; + struct btree *b = as->b; + u64 journal_seq = 0; + unsigned i; int ret; /* @@ -638,78 +527,17 @@ static void btree_update_nodes_written(struct closure *cl) * to child nodes that weren't written yet: now, the child nodes have * been written so we can write out the update to the interior node. */ - mutex_lock(&c->btree_interior_update_lock); - as->nodes_written = true; -again: - nr_nodes_need_write = 0; - as = list_first_entry_or_null(&c->btree_interior_updates_unwritten, - struct btree_update, unwritten_list); - if (!as || !as->nodes_written) { - mutex_unlock(&c->btree_interior_update_lock); - return; - } - - b = as->b; - if (b && !six_trylock_intentwrite(&b->c.lock)) { - mutex_unlock(&c->btree_interior_update_lock); - - btree_node_lock_type(c, b, SIX_LOCK_intent); - six_lock_write(&b->c.lock, NULL, NULL); - - six_unlock_write(&b->c.lock); - six_unlock_intent(&b->c.lock); - - mutex_lock(&c->btree_interior_update_lock); - goto again; - } - - ret = bch2_journal_res_get(&c->journal, &res, as->journal_u64s, - JOURNAL_RES_GET_NONBLOCK| - JOURNAL_RES_GET_RESERVED); - if (ret == -EAGAIN) { - unsigned u64s = as->journal_u64s; - - if (b) { - six_unlock_write(&b->c.lock); - six_unlock_intent(&b->c.lock); - } - - mutex_unlock(&c->btree_interior_update_lock); - - ret = bch2_journal_res_get(&c->journal, &res, u64s, - JOURNAL_RES_GET_CHECK| - JOURNAL_RES_GET_RESERVED); - if (!ret) { - mutex_lock(&c->btree_interior_update_lock); - goto again; - } - } - - if (!ret) { - struct journal_buf *buf = &c->journal.buf[res.idx]; - struct jset_entry *entry = vstruct_idx(buf->data, res.offset); - - res.offset += as->journal_u64s; - res.u64s -= as->journal_u64s; - memcpy_u64s(entry, as->journal_entries, as->journal_u64s); - } else { - /* - * On journal error we have to run most of the normal path so - * that shutdown works - unblocking btree node writes in - * particular and writing them if needed - except for - * journalling the update: - */ - - BUG_ON(!bch2_journal_error(&c->journal)); - } - - switch (as->mode) { - case BTREE_INTERIOR_NO_UPDATE: - BUG(); - case BTREE_INTERIOR_UPDATING_NODE: - /* @b is the node we did the final insert into: */ - + ret = bch2_trans_do(c, &as->disk_res, &journal_seq, + BTREE_INSERT_NOFAIL| + BTREE_INSERT_NOCHECK_RW| + BTREE_INSERT_JOURNAL_RESERVED, + btree_update_nodes_written_trans(&trans, as)); + BUG_ON(ret && !bch2_journal_error(&c->journal)); + + if (b) { /* + * @b is the node we did the final insert into: + * * On failure to get a journal reservation, we still have to * unblock the write and allow most of the write path to happen * so that shutdown works, but the i->journal_seq mechanism @@ -719,83 +547,90 @@ again: * we're in journal error state: */ + btree_node_lock_type(c, b, SIX_LOCK_intent); + btree_node_lock_type(c, b, SIX_LOCK_write); + mutex_lock(&c->btree_interior_update_lock); + list_del(&as->write_blocked_list); - if (!ret) { + if (!ret && as->b == b) { struct bset *i = btree_bset_last(b); + BUG_ON(!b->c.level); + BUG_ON(!btree_node_dirty(b)); + i->journal_seq = cpu_to_le64( - max(res.seq, + max(journal_seq, le64_to_cpu(i->journal_seq))); - bch2_btree_add_journal_pin(c, b, res.seq); + bch2_btree_add_journal_pin(c, b, journal_seq); } - nodes_need_write[nr_nodes_need_write++] = b; - + mutex_unlock(&c->btree_interior_update_lock); six_unlock_write(&b->c.lock); - six_unlock_intent(&b->c.lock); - break; - - case BTREE_INTERIOR_UPDATING_AS: - BUG_ON(b); - break; - - case BTREE_INTERIOR_UPDATING_ROOT: - r = &c->btree_roots[as->btree_id]; - BUG_ON(b); - - mutex_lock(&c->btree_root_lock); - bkey_copy(&r->key, as->parent_keys.keys); - r->level = as->level; - r->alive = true; - c->btree_roots_dirty = true; - mutex_unlock(&c->btree_root_lock); - break; + btree_node_write_if_need(c, b, SIX_LOCK_intent); + six_unlock_intent(&b->c.lock); } bch2_journal_pin_drop(&c->journal, &as->journal); - bch2_journal_res_put(&c->journal, &res); bch2_journal_preres_put(&c->journal, &as->journal_preres); - while (as->nr_new_nodes) { - b = as->new_nodes[--as->nr_new_nodes]; + mutex_lock(&c->btree_interior_update_lock); + for (i = 0; i < as->nr_new_nodes; i++) { + b = as->new_nodes[i]; BUG_ON(b->will_make_reachable != (unsigned long) as); b->will_make_reachable = 0; + } + mutex_unlock(&c->btree_interior_update_lock); + + for (i = 0; i < as->nr_new_nodes; i++) { + b = as->new_nodes[i]; - nodes_need_write[nr_nodes_need_write++] = b; + btree_node_lock_type(c, b, SIX_LOCK_read); + btree_node_write_if_need(c, b, SIX_LOCK_read); + six_unlock_read(&b->c.lock); } - while (as->nr_pending) - bch2_btree_node_free_ondisk(c, - &as->pending[--as->nr_pending], res.seq); + for (i = 0; i < as->nr_open_buckets; i++) + bch2_open_bucket_put(c, c->open_buckets + as->open_buckets[i]); - __bch2_btree_update_free(as); - /* - * for flush_held_btree_writes() waiting on updates to flush or - * nodes to be writeable: - */ - closure_wake_up(&c->btree_interior_update_wait); + bch2_btree_update_free(as); +} - /* - * Can't take btree node locks while holding btree_interior_update_lock: - * */ - mutex_unlock(&c->btree_interior_update_lock); +static void btree_interior_update_work(struct work_struct *work) +{ + struct bch_fs *c = + container_of(work, struct bch_fs, btree_interior_update_work); + struct btree_update *as; - /* Do btree writes after dropping journal res/locks: */ - while (nr_nodes_need_write) { - b = nodes_need_write[--nr_nodes_need_write]; + while (1) { + mutex_lock(&c->btree_interior_update_lock); + as = list_first_entry_or_null(&c->btree_interior_updates_unwritten, + struct btree_update, unwritten_list); + if (as && !as->nodes_written) + as = NULL; + mutex_unlock(&c->btree_interior_update_lock); - btree_node_lock_type(c, b, SIX_LOCK_read); - bch2_btree_node_write_cond(c, b, btree_node_need_write(b)); - six_unlock_read(&b->c.lock); + if (!as) + break; + + btree_update_nodes_written(as); } +} + +static void btree_update_set_nodes_written(struct closure *cl) +{ + struct btree_update *as = container_of(cl, struct btree_update, cl); + struct bch_fs *c = as->c; mutex_lock(&c->btree_interior_update_lock); - goto again; + as->nodes_written = true; + mutex_unlock(&c->btree_interior_update_lock); + + queue_work(c->btree_interior_update_worker, &c->btree_interior_update_work); } /* @@ -814,7 +649,6 @@ static void btree_update_updated_node(struct btree_update *as, struct btree *b) as->mode = BTREE_INTERIOR_UPDATING_NODE; as->b = b; - as->level = b->c.level; list_add(&as->write_blocked_list, &b->write_blocked); mutex_unlock(&c->btree_interior_update_lock); @@ -845,25 +679,45 @@ static void btree_update_reparent(struct btree_update *as, static void btree_update_updated_root(struct btree_update *as, struct btree *b) { + struct bkey_i *insert = &b->key; struct bch_fs *c = as->c; BUG_ON(as->mode != BTREE_INTERIOR_NO_UPDATE); - BUG_ON(!bch2_keylist_empty(&as->parent_keys)); + + BUG_ON(as->journal_u64s + jset_u64s(insert->k.u64s) > + ARRAY_SIZE(as->journal_entries)); + + as->journal_u64s += + journal_entry_set((void *) &as->journal_entries[as->journal_u64s], + BCH_JSET_ENTRY_btree_root, + b->c.btree_id, b->c.level, + insert, insert->k.u64s); mutex_lock(&c->btree_interior_update_lock); list_add_tail(&as->unwritten_list, &c->btree_interior_updates_unwritten); as->mode = BTREE_INTERIOR_UPDATING_ROOT; - as->level = b->c.level; - bch2_keylist_add(&as->parent_keys, &b->key); mutex_unlock(&c->btree_interior_update_lock); } -static void btree_node_will_make_reachable(struct btree_update *as, - struct btree *b) +/* + * bch2_btree_update_add_new_node: + * + * This causes @as to wait on @b to be written, before it gets to + * bch2_btree_update_nodes_written + * + * Additionally, it sets b->will_make_reachable to prevent any additional writes + * to @b from happening besides the first until @b is reachable on disk + * + * And it adds @b to the list of @as's new nodes, so that we can update sector + * counts in bch2_btree_update_nodes_written: + */ +void bch2_btree_update_add_new_node(struct btree_update *as, struct btree *b) { struct bch_fs *c = as->c; + closure_get(&as->cl); + mutex_lock(&c->btree_interior_update_lock); BUG_ON(as->nr_new_nodes >= ARRAY_SIZE(as->new_nodes)); BUG_ON(b->will_make_reachable); @@ -871,10 +725,14 @@ static void btree_node_will_make_reachable(struct btree_update *as, as->new_nodes[as->nr_new_nodes++] = b; b->will_make_reachable = 1UL|(unsigned long) as; - closure_get(&as->cl); mutex_unlock(&c->btree_interior_update_lock); + + btree_update_will_add_key(as, &b->key); } +/* + * returns true if @b was a new node + */ static void btree_update_drop_new_node(struct bch_fs *c, struct btree *b) { struct btree_update *as; @@ -882,6 +740,11 @@ static void btree_update_drop_new_node(struct bch_fs *c, struct btree *b) unsigned i; mutex_lock(&c->btree_interior_update_lock); + /* + * When b->will_make_reachable != 0, it owns a ref on as->cl that's + * dropped when it gets written by bch2_btree_complete_write - the + * xchg() is for synchronization with bch2_btree_complete_write: + */ v = xchg(&b->will_make_reachable, 0); as = (struct btree_update *) (v & ~1UL); @@ -903,25 +766,11 @@ found: closure_put(&as->cl); } -static void btree_interior_update_add_node_reference(struct btree_update *as, - struct btree *b) +void bch2_btree_update_get_open_buckets(struct btree_update *as, struct btree *b) { - struct bch_fs *c = as->c; - struct pending_btree_node_free *d; - - mutex_lock(&c->btree_interior_update_lock); - - /* Add this node to the list of nodes being freed: */ - BUG_ON(as->nr_pending >= ARRAY_SIZE(as->pending)); - - d = &as->pending[as->nr_pending++]; - d->index_update_done = false; - d->seq = b->data->keys.seq; - d->btree_id = b->c.btree_id; - d->level = b->c.level; - bkey_copy(&d->key, &b->key); - - mutex_unlock(&c->btree_interior_update_lock); + while (b->ob.nr) + as->open_buckets[as->nr_open_buckets++] = + b->ob.v[--b->ob.nr]; } /* @@ -941,8 +790,6 @@ void bch2_btree_interior_update_will_free_node(struct btree_update *as, if (btree_node_fake(b)) return; - btree_interior_update_add_node_reference(as, b); - mutex_lock(&c->btree_interior_update_lock); /* @@ -984,16 +831,28 @@ void bch2_btree_interior_update_will_free_node(struct btree_update *as, bch2_journal_pin_drop(&c->journal, &w->journal); mutex_unlock(&c->btree_interior_update_lock); + + /* + * Is this a node that isn't reachable on disk yet? + * + * Nodes that aren't reachable yet have writes blocked until they're + * reachable - now that we've cancelled any pending writes and moved + * things waiting on that write to wait on this update, we can drop this + * node from the list of nodes that the other update is making + * reachable, prior to freeing it: + */ + btree_update_drop_new_node(c, b); + + btree_update_will_delete_key(as, &b->key); } void bch2_btree_update_done(struct btree_update *as) { BUG_ON(as->mode == BTREE_INTERIOR_NO_UPDATE); - bch2_btree_reserve_put(as->c, as->reserve); - as->reserve = NULL; + bch2_btree_reserve_put(as); - continue_at(&as->cl, btree_update_nodes_written, system_freezable_wq); + continue_at(&as->cl, btree_update_set_nodes_written, system_freezable_wq); } struct btree_update * @@ -1002,12 +861,32 @@ bch2_btree_update_start(struct btree_trans *trans, enum btree_id id, struct closure *cl) { struct bch_fs *c = trans->c; - struct journal_preres journal_preres = { 0 }; - struct btree_reserve *reserve; struct btree_update *as; - int ret; + int ret, disk_res_flags = (flags & BTREE_INSERT_NOFAIL) + ? BCH_DISK_RESERVATION_NOFAIL : 0; + + /* + * This check isn't necessary for correctness - it's just to potentially + * prevent us from doing a lot of work that'll end up being wasted: + */ + ret = bch2_journal_error(&c->journal); + if (ret) + return ERR_PTR(ret); + + as = mempool_alloc(&c->btree_interior_update_pool, GFP_NOIO); + memset(as, 0, sizeof(*as)); + closure_init(&as->cl, NULL); + as->c = c; + as->mode = BTREE_INTERIOR_NO_UPDATE; + as->btree_id = id; + INIT_LIST_HEAD(&as->list); + INIT_LIST_HEAD(&as->unwritten_list); + INIT_LIST_HEAD(&as->write_blocked_list); + bch2_keylist_init(&as->old_keys, as->_old_keys); + bch2_keylist_init(&as->new_keys, as->_new_keys); + bch2_keylist_init(&as->parent_keys, as->inline_keys); - ret = bch2_journal_preres_get(&c->journal, &journal_preres, + ret = bch2_journal_preres_get(&c->journal, &as->journal_preres, BTREE_UPDATE_JOURNAL_RES, JOURNAL_RES_GET_NONBLOCK); if (ret == -EAGAIN) { @@ -1016,46 +895,41 @@ bch2_btree_update_start(struct btree_trans *trans, enum btree_id id, bch2_trans_unlock(trans); - ret = bch2_journal_preres_get(&c->journal, &journal_preres, + ret = bch2_journal_preres_get(&c->journal, &as->journal_preres, BTREE_UPDATE_JOURNAL_RES, 0); if (ret) return ERR_PTR(ret); if (!bch2_trans_relock(trans)) { - bch2_journal_preres_put(&c->journal, &journal_preres); - return ERR_PTR(-EINTR); + ret = -EINTR; + goto err; } } - reserve = bch2_btree_reserve_get(c, nr_nodes, flags, cl); - if (IS_ERR(reserve)) { - bch2_journal_preres_put(&c->journal, &journal_preres); - return ERR_CAST(reserve); - } - - as = mempool_alloc(&c->btree_interior_update_pool, GFP_NOIO); - memset(as, 0, sizeof(*as)); - closure_init(&as->cl, NULL); - as->c = c; - as->mode = BTREE_INTERIOR_NO_UPDATE; - as->btree_id = id; - as->reserve = reserve; - INIT_LIST_HEAD(&as->write_blocked_list); - INIT_LIST_HEAD(&as->unwritten_list); - as->journal_preres = journal_preres; + ret = bch2_disk_reservation_get(c, &as->disk_res, + nr_nodes * c->opts.btree_node_size, + c->opts.metadata_replicas, + disk_res_flags); + if (ret) + goto err; - bch2_keylist_init(&as->parent_keys, as->inline_keys); + ret = bch2_btree_reserve_get(as, nr_nodes, flags, cl); + if (ret) + goto err; mutex_lock(&c->btree_interior_update_lock); list_add_tail(&as->list, &c->btree_interior_update_list); mutex_unlock(&c->btree_interior_update_lock); return as; +err: + bch2_btree_update_free(as); + return ERR_PTR(ret); } /* Btree root updates: */ -static void __bch2_btree_set_root_inmem(struct bch_fs *c, struct btree *b) +static void bch2_btree_set_root_inmem(struct bch_fs *c, struct btree *b) { /* Root nodes cannot be reaped */ mutex_lock(&c->btree_cache.lock); @@ -1073,38 +947,6 @@ static void __bch2_btree_set_root_inmem(struct bch_fs *c, struct btree *b) bch2_recalc_btree_reserve(c); } -static void bch2_btree_set_root_inmem(struct btree_update *as, struct btree *b) -{ - struct bch_fs *c = as->c; - struct btree *old = btree_node_root(c, b); - struct bch_fs_usage_online *fs_usage; - - __bch2_btree_set_root_inmem(c, b); - - mutex_lock(&c->btree_interior_update_lock); - percpu_down_read(&c->mark_lock); - fs_usage = bch2_fs_usage_scratch_get(c); - - bch2_mark_key_locked(c, bkey_i_to_s_c(&b->key), - 0, 0, &fs_usage->u, 0, - BTREE_TRIGGER_INSERT); - if (gc_visited(c, gc_pos_btree_root(b->c.btree_id))) - bch2_mark_key_locked(c, bkey_i_to_s_c(&b->key), - 0, 0, NULL, 0, - BTREE_TRIGGER_INSERT| - BTREE_TRIGGER_GC); - - if (old && !btree_node_fake(old)) - bch2_btree_node_free_index(as, NULL, - bkey_i_to_s_c(&old->key), - &fs_usage->u); - bch2_fs_usage_apply(c, fs_usage, &as->reserve->disk_res, 0); - - bch2_fs_usage_scratch_put(c, fs_usage); - percpu_up_read(&c->mark_lock); - mutex_unlock(&c->btree_interior_update_lock); -} - /** * bch_btree_set_root - update the root in memory and on disk * @@ -1135,7 +977,7 @@ static void bch2_btree_set_root(struct btree_update *as, struct btree *b, */ bch2_btree_node_lock_write(old, iter); - bch2_btree_set_root_inmem(as, b); + bch2_btree_set_root_inmem(c, b); btree_update_updated_root(as, b); @@ -1156,57 +998,21 @@ static void bch2_insert_fixup_btree_ptr(struct btree_update *as, struct btree *b struct bkey_i *insert, struct btree_node_iter *node_iter) { - struct bch_fs *c = as->c; - struct bch_fs_usage_online *fs_usage; - struct jset_entry *entry; struct bkey_packed *k; - struct bkey tmp; BUG_ON(as->journal_u64s + jset_u64s(insert->k.u64s) > ARRAY_SIZE(as->journal_entries)); - entry = (void *) &as->journal_entries[as->journal_u64s]; - memset(entry, 0, sizeof(*entry)); - entry->u64s = cpu_to_le16(insert->k.u64s); - entry->type = BCH_JSET_ENTRY_btree_keys; - entry->btree_id = b->c.btree_id; - entry->level = b->c.level; - memcpy_u64s_small(entry->_data, insert, insert->k.u64s); - as->journal_u64s += jset_u64s(insert->k.u64s); - - mutex_lock(&c->btree_interior_update_lock); - percpu_down_read(&c->mark_lock); - fs_usage = bch2_fs_usage_scratch_get(c); - - bch2_mark_key_locked(c, bkey_i_to_s_c(insert), - 0, 0, &fs_usage->u, 0, - BTREE_TRIGGER_INSERT); - - if (gc_visited(c, gc_pos_btree_node(b))) - bch2_mark_key_locked(c, bkey_i_to_s_c(insert), - 0, 0, NULL, 0, - BTREE_TRIGGER_INSERT| - BTREE_TRIGGER_GC); + as->journal_u64s += + journal_entry_set((void *) &as->journal_entries[as->journal_u64s], + BCH_JSET_ENTRY_btree_keys, + b->c.btree_id, b->c.level, + insert, insert->k.u64s); while ((k = bch2_btree_node_iter_peek_all(node_iter, b)) && bkey_iter_pos_cmp(b, k, &insert->k.p) < 0) bch2_btree_node_iter_advance(node_iter, b); - /* - * If we're overwriting, look up pending delete and mark so that gc - * marks it on the pending delete list: - */ - if (k && !bkey_cmp_packed(b, k, &insert->k)) - bch2_btree_node_free_index(as, b, - bkey_disassemble(b, k, &tmp), - &fs_usage->u); - - bch2_fs_usage_apply(c, fs_usage, &as->reserve->disk_res, 0); - - bch2_fs_usage_scratch_put(c, fs_usage); - percpu_up_read(&c->mark_lock); - mutex_unlock(&c->btree_interior_update_lock); - bch2_btree_bset_insert_key(iter, b, node_iter, insert); set_btree_node_dirty(b); set_btree_node_need_write(b); @@ -1226,6 +1032,7 @@ static struct btree *__btree_split_node(struct btree_update *as, struct bkey_packed *k, *prev = NULL; n2 = bch2_btree_node_alloc(as, n1->c.level); + bch2_btree_update_add_new_node(as, n2); n2->data->max_key = n1->data->max_key; n2->data->format = n1->format; @@ -1321,14 +1128,6 @@ static void btree_split_insert_keys(struct btree_update *as, struct btree *b, struct bkey_packed *src, *dst, *n; struct bset *i; - /* - * XXX - * - * these updates must be journalled - * - * oops - */ - BUG_ON(btree_node_type(b) != BKEY_TYPE_BTREE); bch2_btree_node_iter_init(&node_iter, b, &k->k.p); @@ -1380,6 +1179,7 @@ static void btree_split(struct btree_update *as, struct btree *b, bch2_btree_interior_update_will_free_node(as, b); n1 = bch2_btree_node_alloc_replacement(as, b); + bch2_btree_update_add_new_node(as, n1); if (keys) btree_split_insert_keys(as, n1, iter, keys); @@ -1439,11 +1239,11 @@ static void btree_split(struct btree_update *as, struct btree *b, bch2_btree_set_root(as, n1, iter); } - bch2_open_buckets_put(c, &n1->ob); + bch2_btree_update_get_open_buckets(as, n1); if (n2) - bch2_open_buckets_put(c, &n2->ob); + bch2_btree_update_get_open_buckets(as, n2); if (n3) - bch2_open_buckets_put(c, &n3->ob); + bch2_btree_update_get_open_buckets(as, n3); /* Successful split, update the iterator to point to the new nodes: */ @@ -1538,7 +1338,7 @@ void bch2_btree_insert_node(struct btree_update *as, struct btree *b, bch2_btree_node_lock_for_insert(c, b, iter); - if (!bch2_btree_node_insert_fits(c, b, bch_keylist_u64s(keys))) { + if (!bch2_btree_node_insert_fits(c, b, bch2_keylist_u64s(keys))) { bch2_btree_node_unlock_write(b, iter); goto split; } @@ -1749,6 +1549,7 @@ retry: bch2_btree_interior_update_will_free_node(as, m); n = bch2_btree_node_alloc(as, b->c.level); + bch2_btree_update_add_new_node(as, n); btree_set_min(n, prev->data->min_key); btree_set_max(n, next->data->max_key); @@ -1771,7 +1572,7 @@ retry: bch2_btree_insert_node(as, parent, iter, &as->parent_keys, flags); - bch2_open_buckets_put(c, &n->ob); + bch2_btree_update_get_open_buckets(as, n); six_lock_increment(&b->c.lock, SIX_LOCK_intent); bch2_btree_iter_node_drop(iter, b); @@ -1859,6 +1660,7 @@ static int __btree_node_rewrite(struct bch_fs *c, struct btree_iter *iter, bch2_btree_interior_update_will_free_node(as, b); n = bch2_btree_node_alloc_replacement(as, b); + bch2_btree_update_add_new_node(as, n); bch2_btree_build_aux_trees(n); six_unlock_write(&n->c.lock); @@ -1874,7 +1676,7 @@ static int __btree_node_rewrite(struct bch_fs *c, struct btree_iter *iter, bch2_btree_set_root(as, n, iter); } - bch2_open_buckets_put(c, &n->ob); + bch2_btree_update_get_open_buckets(as, n); six_lock_increment(&b->c.lock, SIX_LOCK_intent); bch2_btree_iter_node_drop(iter, b); @@ -1949,49 +1751,8 @@ static void __bch2_btree_node_update_key(struct bch_fs *c, struct btree *parent; int ret; - /* - * Two corner cases that need to be thought about here: - * - * @b may not be reachable yet - there might be another interior update - * operation waiting on @b to be written, and we're gonna deliver the - * write completion to that interior update operation _before_ - * persisting the new_key update - * - * That ends up working without us having to do anything special here: - * the reason is, we do kick off (and do the in memory updates) for the - * update for @new_key before we return, creating a new interior_update - * operation here. - * - * The new interior update operation here will in effect override the - * previous one. The previous one was going to terminate - make @b - * reachable - in one of two ways: - * - updating the btree root pointer - * In that case, - * no, this doesn't work. argh. - */ - - if (b->will_make_reachable) - as->must_rewrite = true; - - btree_interior_update_add_node_reference(as, b); - - /* - * XXX: the rest of the update path treats this like we're actually - * inserting a new node and deleting the existing node, so the - * reservation needs to include enough space for @b - * - * that is actually sketch as fuck though and I am surprised the code - * seems to work like that, definitely need to go back and rework it - * into something saner. - * - * (I think @b is just getting double counted until the btree update - * finishes and "deletes" @b on disk) - */ - ret = bch2_disk_reservation_add(c, &as->reserve->disk_res, - c->opts.btree_node_size * - bch2_bkey_nr_ptrs(bkey_i_to_s_c(new_key)), - BCH_DISK_RESERVATION_NOFAIL); - BUG_ON(ret); + btree_update_will_delete_key(as, &b->key); + btree_update_will_add_key(as, new_key); parent = btree_node_parent(iter, b); if (parent) { @@ -2019,44 +1780,18 @@ static void __bch2_btree_node_update_key(struct bch_fs *c, bkey_copy(&b->key, new_key); } } else { - struct bch_fs_usage_online *fs_usage; - BUG_ON(btree_node_root(c, b) != b); bch2_btree_node_lock_write(b, iter); + bkey_copy(&b->key, new_key); - mutex_lock(&c->btree_interior_update_lock); - percpu_down_read(&c->mark_lock); - fs_usage = bch2_fs_usage_scratch_get(c); - - bch2_mark_key_locked(c, bkey_i_to_s_c(new_key), - 0, 0, &fs_usage->u, 0, - BTREE_TRIGGER_INSERT); - if (gc_visited(c, gc_pos_btree_root(b->c.btree_id))) - bch2_mark_key_locked(c, bkey_i_to_s_c(new_key), - 0, 0, NULL, 0, - BTREE_TRIGGER_INSERT|| - BTREE_TRIGGER_GC); - - bch2_btree_node_free_index(as, NULL, - bkey_i_to_s_c(&b->key), - &fs_usage->u); - bch2_fs_usage_apply(c, fs_usage, &as->reserve->disk_res, 0); - - bch2_fs_usage_scratch_put(c, fs_usage); - percpu_up_read(&c->mark_lock); - mutex_unlock(&c->btree_interior_update_lock); - - if (btree_ptr_hash_val(new_key) != b->hash_val) { + if (btree_ptr_hash_val(&b->key) != b->hash_val) { mutex_lock(&c->btree_cache.lock); bch2_btree_node_hash_remove(&c->btree_cache, b); - bkey_copy(&b->key, new_key); ret = __bch2_btree_node_hash_insert(&c->btree_cache, b); BUG_ON(ret); mutex_unlock(&c->btree_cache.lock); - } else { - bkey_copy(&b->key, new_key); } btree_update_updated_root(as, b); @@ -2171,7 +1906,7 @@ void bch2_btree_set_root_for_read(struct bch_fs *c, struct btree *b) { BUG_ON(btree_node_root(c, b)); - __bch2_btree_set_root_inmem(c, b); + bch2_btree_set_root_inmem(c, b); } void bch2_btree_root_alloc(struct bch_fs *c, enum btree_id id) @@ -2211,7 +1946,7 @@ void bch2_btree_root_alloc(struct bch_fs *c, enum btree_id id) b->c.level, b->c.btree_id); BUG_ON(ret); - __bch2_btree_set_root_inmem(c, b); + bch2_btree_set_root_inmem(c, b); six_unlock_write(&b->c.lock); six_unlock_intent(&b->c.lock); @@ -2248,10 +1983,59 @@ size_t bch2_btree_interior_updates_nr_pending(struct bch_fs *c) return ret; } +void bch2_journal_entries_to_btree_roots(struct bch_fs *c, struct jset *jset) +{ + struct btree_root *r; + struct jset_entry *entry; + + mutex_lock(&c->btree_root_lock); + + vstruct_for_each(jset, entry) + if (entry->type == BCH_JSET_ENTRY_btree_root) { + r = &c->btree_roots[entry->btree_id]; + r->level = entry->level; + r->alive = true; + bkey_copy(&r->key, &entry->start[0]); + } + + mutex_unlock(&c->btree_root_lock); +} + +struct jset_entry * +bch2_btree_roots_to_journal_entries(struct bch_fs *c, + struct jset_entry *start, + struct jset_entry *end) +{ + struct jset_entry *entry; + unsigned long have = 0; + unsigned i; + + for (entry = start; entry < end; entry = vstruct_next(entry)) + if (entry->type == BCH_JSET_ENTRY_btree_root) + __set_bit(entry->btree_id, &have); + + mutex_lock(&c->btree_root_lock); + + for (i = 0; i < BTREE_ID_NR; i++) + if (c->btree_roots[i].alive && !test_bit(i, &have)) { + journal_entry_set(end, + BCH_JSET_ENTRY_btree_root, + i, c->btree_roots[i].level, + &c->btree_roots[i].key, + c->btree_roots[i].key.u64s); + end = vstruct_next(end); + } + + mutex_unlock(&c->btree_root_lock); + + return end; +} + void bch2_fs_btree_interior_update_exit(struct bch_fs *c) { + if (c->btree_interior_update_worker) + destroy_workqueue(c->btree_interior_update_worker); mempool_exit(&c->btree_interior_update_pool); - mempool_exit(&c->btree_reserve_pool); } int bch2_fs_btree_interior_update_init(struct bch_fs *c) @@ -2260,9 +2044,13 @@ int bch2_fs_btree_interior_update_init(struct bch_fs *c) INIT_LIST_HEAD(&c->btree_interior_update_list); INIT_LIST_HEAD(&c->btree_interior_updates_unwritten); mutex_init(&c->btree_interior_update_lock); + INIT_WORK(&c->btree_interior_update_work, btree_interior_update_work); + + c->btree_interior_update_worker = + alloc_workqueue("btree_update", WQ_UNBOUND|WQ_MEM_RECLAIM, 1); + if (!c->btree_interior_update_worker) + return -ENOMEM; - return mempool_init_kmalloc_pool(&c->btree_reserve_pool, 1, - sizeof(struct btree_reserve)) ?: - mempool_init_kmalloc_pool(&c->btree_interior_update_pool, 1, - sizeof(struct btree_update)); + return mempool_init_kmalloc_pool(&c->btree_interior_update_pool, 1, + sizeof(struct btree_update)); } |