bpf: sync bpf.h to tools/ for BPF_F_ADJ_ROOM_ENCAP_L2

Sync include/uapi/linux/bpf.h with tools/ equivalent to add
BPF_F_ADJ_ROOM_ENCAP_L2(len) macro.

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

1 files changed, 10 insertions, 0 deletions

diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 31a27dd337dc..2e96d0b4bf65 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -1523,6 +1523,10 @@ union bpf_attr {
  *              * **BPF_F_ADJ_ROOM_ENCAP_L4_UDP **:
  *                Use with ENCAP_L3 flags to further specify the tunnel type.
  *
+ *              * **BPF_F_ADJ_ROOM_ENCAP_L2(len) **:
+ *                Use with ENCAP_L3/L4 flags to further specify the tunnel
+ *                type; **len** is the length of the inner MAC header.
+ *
  *              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
@@ -2664,10 +2668,16 @@ enum bpf_func_id {
 /* BPF_FUNC_skb_adjust_room flags. */
 #define BPF_F_ADJ_ROOM_FIXED_GSO        (1ULL << 0)
 
+#define BPF_ADJ_ROOM_ENCAP_L2_MASK      0xff
+#define BPF_ADJ_ROOM_ENCAP_L2_SHIFT     56
+
 #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)
+#define BPF_F_ADJ_ROOM_ENCAP_L2(len)    (((__u64)len & \
+                                          BPF_ADJ_ROOM_ENCAP_L2_MASK) \
+                                         << BPF_ADJ_ROOM_ENCAP_L2_SHIFT)
 
 /* Mode for BPF_FUNC_skb_adjust_room helper. */
 enum bpf_adj_room_mode {