netdev - Re: [PATCH iproute2-next] ip link: Add support to get SR-IOV VF node GUID and port GUID

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Date:   Thu, 14 Nov 2019 13:35:11 -0700
From:   David Ahern <dsahern@...il.com>
To:     Leon Romanovsky <leon@...nel.org>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        "David S . Miller" <davem@...emloft.net>
Cc:     Leon Romanovsky <leonro@...lanox.com>,
        RDMA mailing list <linux-rdma@...r.kernel.org>,
        Danit Goldberg <danitg@...lanox.com>,
        linux-netdev <netdev@...r.kernel.org>,
        Stephen Hemminger <stephen@...workplumber.org>
Subject: Re: [PATCH iproute2-next] ip link: Add support to get SR-IOV VF node
 GUID and port GUID

On 11/14/19 6:31 AM, Leon Romanovsky wrote:
> diff --git a/ip/ipaddress.c b/ip/ipaddress.c
> index b72eb7a1..ed72d0bd 100644
> --- a/ip/ipaddress.c
> +++ b/ip/ipaddress.c
> @@ -484,6 +484,29 @@ static void print_vfinfo(FILE *fp, struct ifinfomsg *ifi, struct rtattr *vfinfo)
>  				   vf_spoofchk->setting);
>  	}
>  
> +#define GUID_STR_LEN 24
> +	if (vf[IFLA_VF_IB_NODE_GUID]) {
> +		char buf[GUID_STR_LEN];

buf should be declared with SPRINT_BUF; see other users of ll_addr_n2a.
And, print_vfinfo already has b1 declared so you do not need a new one;
just change buf to b1.


> +		struct ifla_vf_guid *guid = RTA_DATA(vf[IFLA_VF_IB_NODE_GUID]);
> +		uint64_t node_guid = ntohll(guid->guid);
> +
> +		print_string(PRINT_ANY, "node guid", ", NODE_GUID %s",
> +				ll_addr_n2a((const unsigned char *)&node_guid,
> +					 RTA_PAYLOAD(vf[IFLA_VF_IB_NODE_GUID]),
> +					 ARPHRD_INFINIBAND,
> +					 buf, sizeof(buf)));
> +	}
> +	if (vf[IFLA_VF_IB_PORT_GUID]) {
> +		char buf[GUID_STR_LEN];
> +		struct ifla_vf_guid *guid = RTA_DATA(vf[IFLA_VF_IB_PORT_GUID]);
> +		uint64_t port_guid = ntohll(guid->guid);
> +
> +		print_string(PRINT_ANY, "port guid", ", PORT_GUID %s",
> +				ll_addr_n2a((const unsigned char *)&port_guid,
> +					 RTA_PAYLOAD(vf[IFLA_VF_IB_PORT_GUID]),
> +					 ARPHRD_INFINIBAND,
> +					 buf, sizeof(buf)));
> +	}
>  	if (vf[IFLA_VF_LINK_STATE]) {
>  		struct ifla_vf_link_state *vf_linkstate =
>  			RTA_DATA(vf[IFLA_VF_LINK_STATE]);
>