[openib-general] [PATCH 2/3] SA: add call to initialize ib_ah_attr from a path record

[Sean Hefty]

Sean Hefty wrote:
> +int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
> +			 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
> +{
> +	int ret;
> +	u16 gid_index;
> +
> +	memset(ah_attr, 0, sizeof *ah_attr);
> +	ah_attr->dlid = be16_to_cpu(rec->dlid);
> +	ah_attr->sl = rec->sl;
> +	ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 0x7F;
> +	ah_attr->port_num = port_num;
> +
> +	if (rec->sgid.global.subnet_prefix != rec->dgid.global.subnet_prefix) {
> +		ah_attr->ah_flags = IB_AH_GRH;

I should note that I compared the subnet prefixes to determine if the GRH should 
be used.  Reading back over the 'GRH flag in ib_ah_attr' thread, it looks like 
there's consensus that hop_limit > 1 is the check that we want.  I will update 
the code accordingly.

- Sean