diff options
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/bpf.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index a6a91e5e96fc..e99e3e6f8b37 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -531,6 +531,14 @@ union bpf_attr { * @optval: pointer to option value * @optlen: length of optval in byes * Return: 0 or negative error + * + * int bpf_skb_adjust_room(skb, len_diff, mode, flags) + * Grow or shrink room in sk_buff. + * @skb: pointer to skb + * @len_diff: (signed) amount of room to grow/shrink + * @mode: operation mode (enum bpf_adj_room_mode) + * @flags: reserved for future use + * Return: 0 on success or negative error code */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -582,7 +590,8 @@ union bpf_attr { FN(get_socket_cookie), \ FN(get_socket_uid), \ FN(set_hash), \ - FN(setsockopt), + FN(setsockopt), \ + FN(skb_adjust_room), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call @@ -632,6 +641,11 @@ enum bpf_func_id { /* BPF_FUNC_perf_event_output for sk_buff input context. */ #define BPF_F_CTXLEN_MASK (0xfffffULL << 32) +/* Mode for BPF_FUNC_skb_adjust_room helper. */ +enum bpf_adj_room_mode { + BPF_ADJ_ROOM_NET, +}; + /* user accessible mirror of in-kernel sk_buff. * new fields can only be added to the end of this structure */ |