Returns the owner uid of the socket inside a sk_buff. This is useful to perform per-UID accounting of network traffic or per-UID packet filtering. The socket need to be a fullsock otherwise overflowuid is returned.
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| @@ -465,6 +465,12 @@ union bpf_attr { · 464 unmodified lines | ||
| 465 | 465 | * @skb: pointer to skb |
| 466 | 466 | * Return: 8 Bytes non-decreasing number on success or 0 if the socket |
| 467 | 467 | * field is missing inside sk_buff |
| 468 | + * | |
| 469 | + * u32 bpf_get_socket_uid(skb) | |
| 470 | + * Get the owner uid of the socket stored inside sk_buff. | |
| 471 | + * @skb: pointer to skb | |
| 472 | + * Return: uid of the socket owner on success or 0 if the socket pointer | |
| 473 | + * inside sk_buff is NULL | |
| 468 | 474 | */ |
| 469 | 475 | #define __BPF_FUNC_MAPPER(FN) \ |
| 470 | 476 | FN(unspec), \ |
| @@ -513,7 +519,8 @@ union bpf_attr { · 42 unmodified lines | ||
| 513 | 519 | FN(skb_change_head), \ |
| 514 | 520 | FN(xdp_adjust_head), \ |
| 515 | 521 | FN(probe_read_str), \ |
| 516 | − FN(get_socket_cookie), | |
| 522 | + FN(get_socket_cookie), \ | |
| 523 | + FN(get_socket_uid), | |
| 517 | 524 | |
| 518 | 525 | /* integer value in 'imm' field of BPF_CALL instruction selects which helper |
| 519 | 526 | * function eBPF program intends to call |