netdev - Re: [PATCH iproute2-next] rdma: Add support for the netlink extack

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Message-ID: <8d59994a-0c08-8c62-d23d-da3f74f57af5@gmail.com>
Date:   Thu, 31 Dec 2020 09:18:52 -0700
From:   David Ahern <dsahern@...il.com>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Patrisious Haddad <phaddad@...dia.com>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        linux-netdev <netdev@...r.kernel.org>,
        RDMA mailing list <linux-rdma@...r.kernel.org>
Subject: Re: [PATCH iproute2-next] rdma: Add support for the netlink extack

On 12/30/20 10:42 PM, Leon Romanovsky wrote:
> diff --git a/rdma/utils.c b/rdma/utils.c
> index 2a201aa4..927e2107 100644
> --- a/rdma/utils.c
> +++ b/rdma/utils.c
> @@ -664,7 +664,7 @@ void rd_prepare_msg(struct rd *rd, uint32_t cmd, uint32_t *seq, uint16_t flags)
> 
>  int rd_send_msg(struct rd *rd)
>  {
> -	int ret;
> +	int ret, one;
> 
>  	rd->nl = mnl_socket_open(NETLINK_RDMA);
>  	if (!rd->nl) {
> @@ -672,6 +672,12 @@ int rd_send_msg(struct rd *rd)
>  		return -ENODEV;
>  	}
> 
> +	ret = mnl_socket_setsockopt(rd->nl, NETLINK_EXT_ACK, &one, sizeof(one));
> +	if (ret < 0) {
> +		pr_err("Failed to set socket option with err %d\n", ret);
> +		goto err;
> +	}
> +
>  	ret = mnl_socket_bind(rd->nl, 0, MNL_SOCKET_AUTOPID);
>  	if (ret < 0) {
>  		pr_err("Failed to bind socket with err %d\n", ret);

you should be able to use mnlu_socket_open in ./lib/mnl_utils.c