Adding sockmap element iterator

[Lorenz Bauer <lmb@xxxxxxxxxxxxxx>]

Hi Yonghong,

I'm currently looking at adding support to iterate sockmap elements.
For that purpose, the context passed to the iterator program needs to
contain PTR_TO_SOCKET, like so:

    .ctx_arg_info = {
        { offsetof(struct bpf_iter__bpf_map_elem, key),
          PTR_TO_RDONLY_BUF_OR_NULL },
        { offsetof(struct bpf_iter__bpf_map_elem, value),
          PTR_TO_SOCKET },
    },

This is in contrast to PTR_TO_RDWR_BUF_OR_NULL. I think I could just
add a separate bpf_sockmap_elem iterator, but I'm guessing that this
is counter to how you would approach this. What do you think is the
best way to achieve this?

Best
Lorenz

-- 
Lorenz Bauer  |  Systems Engineer
6th Floor, County Hall/The Riverside Building, SE1 7PB, UK

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