Add "rx_queue_mapping" to bpf_sock. This gives read access for the existing field (sk_rx_queue_mapping) of struct sock from bpf_sock. Semantics for the bpf_sock rx_queue_mapping access are similar to sk_rx_queue_get(), i.e the value NO_QUEUE_MAPPING is not allowed and -1 is returned in that case. This is useful for transmit queue selection based on the received queue index which is cached in the socket in the receive path. v3: Addressed review comments to add usecase in patch description, and fixed default value for rx_queue_mapping. v2: fixed build error for CONFIG_XPS wrapping, reported by kbuild test robot <lkp@intel.com>
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| @@ -3612,6 +3612,7 @@ struct bpf_sock { · 3611 unmodified lines | ||
| 3612 | 3612 | __u32 dst_ip4; |
| 3613 | 3613 | __u32 dst_ip6[4]; |
| 3614 | 3614 | __u32 state; |
| 3615 | + __s32 rx_queue_mapping; | |
| 3615 | 3616 | }; |
| 3616 | 3617 | |
| 3617 | 3618 | struct bpf_tcp_sock { |