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 4f157d0ec571..837024512baf 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -1486,11 +1486,20 @@ union bpf_attr { * * **BPF_ADJ_ROOM_NET**: Adjust room at the network layer * (room space is added or removed below the layer 3 header). * - * There is one supported flag at this time: + * The following flags are supported at this time: * * * **BPF_F_ADJ_ROOM_FIXED_GSO**: Do not adjust gso_size. * Adjusting mss in this way is not allowed for datagrams. * + * * **BPF_F_ADJ_ROOM_ENCAP_L3_IPV4 **: + * * **BPF_F_ADJ_ROOM_ENCAP_L3_IPV6 **: + * Any new space is reserved to hold a tunnel header. + * Configure skb offsets and other fields accordingly. + * + * * **BPF_F_ADJ_ROOM_ENCAP_L4_GRE **: + * * **BPF_F_ADJ_ROOM_ENCAP_L4_UDP **: + * Use with ENCAP_L3 flags to further specify the tunnel type. + * * A call to this helper is susceptible to change the underlaying * packet buffer. Therefore, at load time, all checks on pointers * previously done by the verifier are invalidated and must be @@ -2632,6 +2641,11 @@ enum bpf_func_id { /* BPF_FUNC_skb_adjust_room flags. */ #define BPF_F_ADJ_ROOM_FIXED_GSO (1ULL << 0) +#define BPF_F_ADJ_ROOM_ENCAP_L3_IPV4 (1ULL << 1) +#define BPF_F_ADJ_ROOM_ENCAP_L3_IPV6 (1ULL << 2) +#define BPF_F_ADJ_ROOM_ENCAP_L4_GRE (1ULL << 3) +#define BPF_F_ADJ_ROOM_ENCAP_L4_UDP (1ULL << 4) + /* Mode for BPF_FUNC_skb_adjust_room helper. */ enum bpf_adj_room_mode { BPF_ADJ_ROOM_NET, |