SUNRPC: Skip zero-refcount transports (163f8821) · Commits · 戴 / test

net/sunrpc/xprtmultipath.c

+19 −1

Original line number	Diff line number	Diff line
		@@ -193,10 +193,22 @@ void xprt_iter_default_rewind(struct rpc_xprt_iter *xpi)
		WRITE_ONCE(xpi->xpi_cursor, NULL);
		}

		static
		bool xprt_is_active(const struct rpc_xprt *xprt)
		{
		return kref_read(&xprt->kref) != 0;
		}

		static
		struct rpc_xprt xprt_switch_find_first_entry(struct list_head head)
		{
		return list_first_or_null_rcu(head, struct rpc_xprt, xprt_switch);
		struct rpc_xprt *pos;

		list_for_each_entry_rcu(pos, head, xprt_switch) {
		if (xprt_is_active(pos))
		return pos;
		}
		return NULL;
		}

		static
		@@ -214,9 +226,12 @@ struct rpc_xprt xprt_switch_find_current_entry(struct list_head head,
		const struct rpc_xprt *cur)
		{
		struct rpc_xprt *pos;
		bool found = false;

		list_for_each_entry_rcu(pos, head, xprt_switch) {
		if (cur == pos)
		found = true;
		if (found && xprt_is_active(pos))
		return pos;
		}
		return NULL;
		@@ -261,9 +276,12 @@ struct rpc_xprt xprt_switch_find_next_entry(struct list_head head,
		const struct rpc_xprt *cur)
		{
		struct rpc_xprt pos, prev = NULL;
		bool found = false;

		list_for_each_entry_rcu(pos, head, xprt_switch) {
		if (cur == prev)
		found = true;
		if (found && xprt_is_active(pos))
		return pos;
		prev = pos;
		}