tc: bpf: generalize pedit action

existing TC action 'pedit' can munge any bits of the packet.
Generalize it for use in bpf programs attached as cls_bpf and act_bpf via
bpf_skb_store_bytes() helper function.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Reviewed-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 280a315de8d6..d5cda067115a 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -59,6 +59,7 @@ enum bpf_arg_type {
         ARG_PTR_TO_STACK,       /* any pointer to eBPF program stack */
         ARG_CONST_STACK_SIZE,   /* number of bytes accessed from stack */
 
+        ARG_PTR_TO_CTX,         /* pointer to context */
         ARG_ANYTHING,           /* any (initialized) argument is ok */
 };
 
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 27dc4ec58840..74aab6e0d964 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -168,6 +168,7 @@ enum bpf_func_id {
         BPF_FUNC_map_delete_elem, /* int map_delete_elem(&map, &key) */
         BPF_FUNC_get_prandom_u32, /* u32 prandom_u32(void) */
         BPF_FUNC_get_smp_processor_id, /* u32 raw_smp_processor_id(void) */
+        BPF_FUNC_skb_store_bytes, /* int skb_store_bytes(skb, offset, from, len) */
         __BPF_FUNC_MAX_ID,
 };