bcachefs: Regularize argument passing of btree_trans

btree_trans should always be passed when we have one - iter->trans is
disfavoured. This mainly updates old code in btree_update_interior.c,
some of which predates btree_trans.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

fs/bcachefs/btree_gc.c

@@ -800,13 +800,13 @@ static int bch2_gc_btree(struct bch_fs *c, enum btree_id btree_id,
 
 		if (!initial) {
 			if (max_stale > 64)
-				bch2_btree_node_rewrite(c, iter,
+				bch2_btree_node_rewrite(&trans, iter,
 						b->data->keys.seq,
 						BTREE_INSERT_NOWAIT|
 						BTREE_INSERT_GC_LOCK_HELD);
 			else if (!bch2_btree_gc_rewrite_disabled &&
 				 (bch2_btree_gc_always_rewrite || max_stale > 16))
-				bch2_btree_node_rewrite(c, iter,
+				bch2_btree_node_rewrite(&trans, iter,
 						b->data->keys.seq,
 						BTREE_INSERT_NOWAIT|
 						BTREE_INSERT_GC_LOCK_HELD);

fs/bcachefs/btree_io.c

@@ -420,9 +420,11 @@ void bch2_btree_build_aux_trees(struct btree *b)
  *
  * Returns true if we sorted (i.e. invalidated iterators
  */
-void bch2_btree_init_next(struct bch_fs *c, struct btree *b,
-			  struct btree_iter *iter)
+void bch2_btree_init_next(struct btree_trans *trans,
+			  struct btree_iter *iter,
+			  struct btree *b)
 {
+	struct bch_fs *c = trans->c;
 	struct btree_node_entry *bne;
 	bool reinit_iter = false;
 
@@ -1563,7 +1565,7 @@ static void bch2_btree_node_write_error(struct bch_fs *c,
 	if (!bch2_bkey_nr_ptrs(bkey_i_to_s_c(k.k)))
 		goto err;
 
-	ret = bch2_btree_node_update_key(c, iter, b, k.k);
+	ret = bch2_btree_node_update_key(&trans, iter, b, k.k);
 	if (ret == -EINTR)
 		goto retry;
 	if (ret)

fs/bcachefs/btree_io.h

@@ -138,8 +138,8 @@ void bch2_btree_sort_into(struct bch_fs *, struct btree *, struct btree *);
 void bch2_btree_node_drop_keys_outside_node(struct btree *);
 
 void bch2_btree_build_aux_trees(struct btree *);
-void bch2_btree_init_next(struct bch_fs *, struct btree *,
-			 struct btree_iter *);
+void bch2_btree_init_next(struct btree_trans *, struct btree_iter *,
+			  struct btree *);
 
 int bch2_btree_node_read_done(struct bch_fs *, struct bch_dev *,
 			      struct btree *, bool);

fs/bcachefs/btree_update.h

@@ -8,8 +8,8 @@
 struct bch_fs;
 struct btree;
 
-void bch2_btree_node_lock_for_insert(struct bch_fs *, struct btree *,
-				     struct btree_iter *);
+void bch2_btree_node_lock_for_insert(struct btree_trans *, struct btree_iter *,
+				     struct btree *);
 bool bch2_btree_bset_insert_key(struct btree_iter *, struct btree *,
 				struct btree_node_iter *, struct bkey_i *);
 void bch2_btree_add_journal_pin(struct bch_fs *, struct btree *, u64);
@@ -70,10 +70,10 @@ int bch2_btree_delete_range_trans(struct btree_trans *, enum btree_id,
 int bch2_btree_delete_range(struct bch_fs *, enum btree_id,
 			    struct bpos, struct bpos, u64 *);
 
-int bch2_btree_node_rewrite(struct bch_fs *c, struct btree_iter *,
+int bch2_btree_node_rewrite(struct btree_trans *, struct btree_iter *,
 			    __le64, unsigned);
 void bch2_btree_node_rewrite_async(struct bch_fs *, struct btree *);
-int bch2_btree_node_update_key(struct bch_fs *, struct btree_iter *,
+int bch2_btree_node_update_key(struct btree_trans *, struct btree_iter *,
 			       struct btree *, struct bkey_i *);
 
 int bch2_trans_update(struct btree_trans *, struct btree_iter *,

fs/bcachefs/btree_update_interior.c

@@ -22,6 +22,10 @@
 
 #include <linux/random.h>
 
+static void bch2_btree_insert_node(struct btree_update *, struct btree_trans *,
+				   struct btree_iter *, struct btree *,
+				   struct keylist *, unsigned);
+
 /* Debug code: */
 
 /*
@@ -1355,8 +1359,9 @@ static void btree_split_insert_keys(struct btree_update *as, struct btree *b,
 	btree_node_interior_verify(as->c, b);
 }
 
-static void btree_split(struct btree_update *as, struct btree *b,
-			struct btree_iter *iter, struct keylist *keys,
+static void btree_split(struct btree_update *as,
+			struct btree_trans *trans, struct btree_iter *iter,
+			struct btree *b, struct keylist *keys,
 			unsigned flags)
 {
 	struct bch_fs *c = as->c;
@@ -1422,7 +1427,7 @@ static void btree_split(struct btree_update *as, struct btree *b,
 
 	if (parent) {
 		/* Split a non root node */
-		bch2_btree_insert_node(as, parent, iter, &as->parent_keys, flags);
+		bch2_btree_insert_node(as, trans, iter, parent, &as->parent_keys, flags);
 	} else if (n3) {
 		bch2_btree_set_root(as, n3, iter);
 	} else {
@@ -1460,7 +1465,7 @@ static void btree_split(struct btree_update *as, struct btree *b,
 		six_unlock_intent(&n2->c.lock);
 	six_unlock_intent(&n1->c.lock);
 
-	bch2_btree_trans_verify_locks(iter->trans);
+	bch2_btree_trans_verify_locks(trans);
 
 	bch2_time_stats_update(&c->times[BCH_TIME_btree_node_split],
 			       start_time);
@@ -1494,9 +1499,10 @@ bch2_btree_insert_keys_interior(struct btree_update *as, struct btree *b,
  * If a split occurred, this function will return early. This can only happen
  * for leaf nodes -- inserts into interior nodes have to be atomic.
  */
-void bch2_btree_insert_node(struct btree_update *as, struct btree *b,
-			    struct btree_iter *iter, struct keylist *keys,
-			    unsigned flags)
+static void bch2_btree_insert_node(struct btree_update *as,
+				   struct btree_trans *trans, struct btree_iter *iter,
+				   struct btree *b, struct keylist *keys,
+				   unsigned flags)
 {
 	struct bch_fs *c = as->c;
 	int old_u64s = le16_to_cpu(btree_bset_last(b)->u64s);
@@ -1509,7 +1515,7 @@ void bch2_btree_insert_node(struct btree_update *as, struct btree *b,
 	BUG_ON(!as || as->b);
 	bch2_verify_keylist_sorted(keys);
 
-	bch2_btree_node_lock_for_insert(c, b, iter);
+	bch2_btree_node_lock_for_insert(trans, iter, b);
 
 	if (!bch2_btree_node_insert_fits(c, b, bch2_keylist_u64s(keys))) {
 		bch2_btree_node_unlock_write(b, iter);
@@ -1537,12 +1543,14 @@ void bch2_btree_insert_node(struct btree_update *as, struct btree *b,
 	btree_node_interior_verify(c, b);
 	return;
 split:
-	btree_split(as, b, iter, keys, flags);
+	btree_split(as, trans, iter, b, keys, flags);
 }
 
-int bch2_btree_split_leaf(struct bch_fs *c, struct btree_iter *iter,
+int bch2_btree_split_leaf(struct btree_trans *trans,
+			  struct btree_iter *iter,
 			  unsigned flags)
 {
+	struct bch_fs *c = trans->c;
 	struct btree *b = iter_l(iter)->b;
 	struct btree_update *as;
 	unsigned l;
@@ -1553,22 +1561,22 @@ int bch2_btree_split_leaf(struct bch_fs *c, struct btree_iter *iter,
 	if (IS_ERR(as))
 		return PTR_ERR(as);
 
-	btree_split(as, b, iter, NULL, flags);
+	btree_split(as, trans, iter, b, NULL, flags);
 	bch2_btree_update_done(as);
 
 	for (l = iter->level + 1; btree_iter_node(iter, l) && !ret; l++)
-		ret = bch2_foreground_maybe_merge(c, iter, l, flags);
+		ret = bch2_foreground_maybe_merge(trans, iter, l, flags);
 
 	return ret;
 }
 
-int __bch2_foreground_maybe_merge(struct bch_fs *c,
+int __bch2_foreground_maybe_merge(struct btree_trans *trans,
 				  struct btree_iter *iter,
 				  unsigned level,
 				  unsigned flags,
 				  enum btree_node_sibling sib)
 {
-	struct btree_trans *trans = iter->trans;
+	struct bch_fs *c = trans->c;
 	struct btree_iter *sib_iter = NULL;
 	struct btree_update *as;
 	struct bkey_format_state new_s;
@@ -1697,7 +1705,7 @@ int __bch2_foreground_maybe_merge(struct bch_fs *c,
 
 	bch2_btree_node_write(c, n, SIX_LOCK_intent);
 
-	bch2_btree_insert_node(as, parent, iter, &as->parent_keys, flags);
+	bch2_btree_insert_node(as, trans, iter, parent, &as->parent_keys, flags);
 
 	bch2_btree_update_get_open_buckets(as, n);
 
@@ -1750,9 +1758,11 @@ int __bch2_foreground_maybe_merge(struct bch_fs *c,
 /**
  * bch_btree_node_rewrite - Rewrite/move a btree node
  */
-int bch2_btree_node_rewrite(struct bch_fs *c, struct btree_iter *iter,
+int bch2_btree_node_rewrite(struct btree_trans *trans,
+			    struct btree_iter *iter,
 			    __le64 seq, unsigned flags)
 {
+	struct bch_fs *c = trans->c;
 	struct btree *b, *n, *parent;
 	struct btree_update *as;
 	int ret;
@@ -1795,7 +1805,8 @@ int bch2_btree_node_rewrite(struct bch_fs *c, struct btree_iter *iter,
 
 	if (parent) {
 		bch2_keylist_add(&as->parent_keys, &n->key);
-		bch2_btree_insert_node(as, parent, iter, &as->parent_keys, flags);
+		bch2_btree_insert_node(as, trans, iter, parent,
+				       &as->parent_keys, flags);
 	} else {
 		bch2_btree_set_root(as, n, iter);
 	}
@@ -1834,7 +1845,7 @@ void async_btree_node_rewrite_work(struct work_struct *work)
 	bch2_trans_init(&trans, c, 0, 0);
 	iter = bch2_trans_get_node_iter(&trans, a->btree_id, a->pos,
 					BTREE_MAX_DEPTH, a->level, 0);
-	bch2_btree_node_rewrite(c, iter, a->seq, 0);
+	bch2_btree_node_rewrite(&trans, iter, a->seq, 0);
 	bch2_trans_iter_put(&trans, iter);
 	bch2_trans_exit(&trans);
 	percpu_ref_put(&c->writes);
@@ -1867,12 +1878,13 @@ void bch2_btree_node_rewrite_async(struct bch_fs *c, struct btree *b)
 	queue_work(c->btree_interior_update_worker, &a->work);
 }
 
-static void __bch2_btree_node_update_key(struct bch_fs *c,
-					 struct btree_update *as,
+static void __bch2_btree_node_update_key(struct btree_update *as,
+					 struct btree_trans *trans,
 					 struct btree_iter *iter,
 					 struct btree *b, struct btree *new_hash,
 					 struct bkey_i *new_key)
 {
+	struct bch_fs *c = as->c;
 	struct btree *parent;
 	int ret;
 
@@ -1889,7 +1901,7 @@ static void __bch2_btree_node_update_key(struct bch_fs *c,
 		}
 
 		bch2_keylist_add(&as->parent_keys, new_key);
-		bch2_btree_insert_node(as, parent, iter, &as->parent_keys, 0);
+		bch2_btree_insert_node(as, trans, iter, parent, &as->parent_keys, 0);
 
 		if (new_hash) {
 			mutex_lock(&c->btree_cache.lock);
@@ -1926,10 +1938,12 @@ static void __bch2_btree_node_update_key(struct bch_fs *c,
 	bch2_btree_update_done(as);
 }
 
-int bch2_btree_node_update_key(struct bch_fs *c, struct btree_iter *iter,
+int bch2_btree_node_update_key(struct btree_trans *trans,
+			       struct btree_iter *iter,
 			       struct btree *b,
 			       struct bkey_i *new_key)
 {
+	struct bch_fs *c = trans->c;
 	struct btree *parent = btree_node_parent(iter, b);
 	struct btree_update *as = NULL;
 	struct btree *new_hash = NULL;
@@ -1962,7 +1976,7 @@ int bch2_btree_node_update_key(struct bch_fs *c, struct btree_iter *iter,
 		goto err;
 	}
 
-	__bch2_btree_node_update_key(c, as, iter, b, new_hash, new_key);
+	__bch2_btree_node_update_key(as, trans, iter, b, new_hash, new_key);
 
 	bch2_btree_iter_downgrade(iter);
 err:

fs/bcachefs/btree_update_interior.h

@@ -131,15 +131,12 @@ void bch2_btree_interior_update_will_free_node(struct btree_update *,
 					       struct btree *);
 void bch2_btree_update_add_new_node(struct btree_update *, struct btree *);
 
-void bch2_btree_insert_node(struct btree_update *, struct btree *,
-			    struct btree_iter *, struct keylist *,
-			    unsigned);
-int bch2_btree_split_leaf(struct bch_fs *, struct btree_iter *, unsigned);
+int bch2_btree_split_leaf(struct btree_trans *, struct btree_iter *, unsigned);
 
-int __bch2_foreground_maybe_merge(struct bch_fs *, struct btree_iter *,
+int __bch2_foreground_maybe_merge(struct btree_trans *, struct btree_iter *,
 				  unsigned, unsigned, enum btree_node_sibling);
 
-static inline int bch2_foreground_maybe_merge_sibling(struct bch_fs *c,
+static inline int bch2_foreground_maybe_merge_sibling(struct btree_trans *trans,
 					struct btree_iter *iter,
 					unsigned level, unsigned flags,
 					enum btree_node_sibling sib)
@@ -153,20 +150,20 @@ static inline int bch2_foreground_maybe_merge_sibling(struct bch_fs *c,
 		return 0;
 
 	b = iter->l[level].b;
-	if (b->sib_u64s[sib] > c->btree_foreground_merge_threshold)
+	if (b->sib_u64s[sib] > trans->c->btree_foreground_merge_threshold)
 		return 0;
 
-	return __bch2_foreground_maybe_merge(c, iter, level, flags, sib);
+	return __bch2_foreground_maybe_merge(trans, iter, level, flags, sib);
 }
 
-static inline int bch2_foreground_maybe_merge(struct bch_fs *c,
-					       struct btree_iter *iter,
-					       unsigned level,
-					       unsigned flags)
+static inline int bch2_foreground_maybe_merge(struct btree_trans *trans,
+					      struct btree_iter *iter,
+					      unsigned level,
+					      unsigned flags)
 {
-	return  bch2_foreground_maybe_merge_sibling(c, iter, level, flags,
+	return  bch2_foreground_maybe_merge_sibling(trans, iter, level, flags,
 						    btree_prev_sib) ?:
-		bch2_foreground_maybe_merge_sibling(c, iter, level, flags,
+		bch2_foreground_maybe_merge_sibling(trans, iter, level, flags,
 						    btree_next_sib);
 }
 

fs/bcachefs/btree_update_leaf.c

@@ -36,9 +36,12 @@ static inline bool same_leaf_as_prev(struct btree_trans *trans,
 		iter_l(i[0].iter)->b == iter_l(i[-1].iter)->b;
 }
 
-inline void bch2_btree_node_lock_for_insert(struct bch_fs *c, struct btree *b,
-					    struct btree_iter *iter)
+inline void bch2_btree_node_lock_for_insert(struct btree_trans *trans,
+					    struct btree_iter *iter,
+					    struct btree *b)
 {
+	struct bch_fs *c = trans->c;
+
 	bch2_btree_node_lock_write(b, iter);
 
 	if (btree_iter_type(iter) == BTREE_ITER_CACHED)
@@ -53,7 +56,7 @@ inline void bch2_btree_node_lock_for_insert(struct bch_fs *c, struct btree *b,
 	 * a new bset to insert into:
 	 */
 	if (want_new_bset(c, b))
-		bch2_btree_init_next(c, b, iter);
+		bch2_btree_init_next(trans, iter, b);
 }
 
 /* Inserting into a given leaf node (last stage of insert): */
@@ -518,7 +521,7 @@ static noinline int maybe_do_btree_merge(struct btree_trans *trans, struct btree
 	}
 
 	return u64s_delta <= 0
-		? (bch2_foreground_maybe_merge(trans->c, iter, iter->level,
+		? (bch2_foreground_maybe_merge(trans, iter, iter->level,
 				trans->flags & ~BTREE_INSERT_NOUNLOCK) ?: -EINTR)
 		: 0;
 }
@@ -608,8 +611,8 @@ static inline int do_bch2_trans_commit(struct btree_trans *trans,
 
 	trans_for_each_update(trans, i)
 		if (!same_leaf_as_prev(trans, i))
-			bch2_btree_node_lock_for_insert(c,
-					iter_l(i->iter)->b, i->iter);
+			bch2_btree_node_lock_for_insert(trans, i->iter,
+					iter_l(i->iter)->b);
 
 	ret = bch2_trans_commit_write_locked(trans, stopped_at, trace_ip);
 
@@ -662,7 +665,7 @@ int bch2_trans_commit_error(struct btree_trans *trans,
 
 	switch (ret) {
 	case BTREE_INSERT_BTREE_NODE_FULL:
-		ret = bch2_btree_split_leaf(c, i->iter, flags);
+		ret = bch2_btree_split_leaf(trans, i->iter, flags);
 
 		/*
 		 * if the split succeeded without dropping locks the insert will

fs/bcachefs/migrate.c

@@ -139,7 +139,7 @@ static int bch2_dev_metadata_drop(struct bch_fs *c, unsigned dev_idx, int flags)
 				break;
 			}
 
-			ret = bch2_btree_node_update_key(c, iter, b, k.k);
+			ret = bch2_btree_node_update_key(&trans, iter, b, k.k);
 			if (ret == -EINTR) {
 				b = bch2_btree_iter_peek_node(iter);
 				ret = 0;

fs/bcachefs/move.c

@@ -786,7 +786,7 @@ static int bch2_move_btree(struct bch_fs *c,
 				BUG();
 			}
 
-			ret = bch2_btree_node_rewrite(c, iter,
+			ret = bch2_btree_node_rewrite(&trans, iter,
 					b->data->keys.seq, 0) ?: ret;
 next:
 			bch2_trans_cond_resched(&trans);