linux-kernel - Re: [PATCH net-next v10 01/14] netdev: add netdev_rx_queue

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Message-ID: <fb8fd578-96b8-45b9-b6a9-fe407157122f@gmail.com>
Date: Mon, 3 Jun 2024 13:52:41 +0100
From: Pavel Begunkov <asml.silence@...il.com>
To: Mina Almasry <almasrymina@...gle.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-alpha@...r.kernel.org, linux-mips@...r.kernel.org,
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 bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
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Subject: Re: [PATCH net-next v10 01/14] netdev: add netdev_rx_queue_restart()

On 5/30/24 21:16, Mina Almasry wrote:
> Add netdev_rx_queue_restart() function to netdev_rx_queue.h
> 
> Signed-off-by: David Wei <dw@...idwei.uk>
> Signed-off-by: Mina Almasry <almasrymina@...gle.com>
> 
> ---
...
> diff --git a/net/core/netdev_rx_queue.c b/net/core/netdev_rx_queue.c
> new file mode 100644
> index 0000000000000..b3899358e5a9c
> --- /dev/null
> +++ b/net/core/netdev_rx_queue.c
> @@ -0,0 +1,74 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +
> +#include <linux/netdevice.h>
> +#include <net/netdev_queues.h>
> +#include <net/netdev_rx_queue.h>
> +
> +int netdev_rx_queue_restart(struct net_device *dev, unsigned int rxq_idx)
> +{
> +	void *new_mem, *old_mem;
> +	int err;

I believe it should also do:

if (!dev->queue_mgmt_ops)
	return -EOPNOTSUPP;

> +
> +	if (!dev->queue_mgmt_ops->ndo_queue_stop ||
> +	    !dev->queue_mgmt_ops->ndo_queue_mem_free ||
> +	    !dev->queue_mgmt_ops->ndo_queue_mem_alloc ||
> +	    !dev->queue_mgmt_ops->ndo_queue_start)
> +		return -EOPNOTSUPP;
> +
> +	DEBUG_NET_WARN_ON_ONCE(!rtnl_is_locked());

-- 
Pavel Begunkov