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bpf: Allow bpf_map_lookup_elem() on an xskmap

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Currently, the AF_XDP code uses a separate map in order to
determine if an xsk is bound to a queue.  Instead of doing this,
have bpf_map_lookup_elem() return a xdp_sock.

Rearrange some xdp_sock members to eliminate structure holes.

Remove selftest - will be added back in later patch.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jonathan Lemon 2019-06-06 13:59:40 -07:00 • committed by Alexei Starovoitov
parent 4ecabd55c9
commit fada7fdc83
7 changed files with 85 additions and 19 deletions
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4
include/uapi/linux/bpf.h
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@ -3083,6 +3083,10 @@ struct bpf_sock_tuple {
};
};
struct bpf_xdp_sock {
__u32 queue_id;
};
#define XDP_PACKET_HEADROOM 256
/* User return codes for XDP prog type.