bpf: remove type arg from __is_valid_{,xdp_}access

Commit d691f9e8d440 ("bpf: allow programs to write to certain skb
fields") pushed access type check outside of __is_valid_access()
to have different restrictions for socket filters and tc programs.
type is thus not used anymore within __is_valid_access() and should
be removed as a function argument. Same for __is_valid_xdp_access()
introduced by 6a773a15a1e8 ("bpf: add XDP prog type for early driver
filter").

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/filter.c b/net/core/filter.c
index 56b4358..b751202 100644 (file)
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2748,7 +2748,7 @@ lwt_xmit_func_proto(enum bpf_func_id func_id)
        }
 }
 
-static bool __is_valid_access(int off, int size, enum bpf_access_type type)
+static bool __is_valid_access(int off, int size)
 {
        if (off < 0 || off >= sizeof(struct __sk_buff))
                return false;
@@ -2782,7 +2782,7 @@ static bool sk_filter_is_valid_access(int off, int size,
                }
        }
 
-       return __is_valid_access(off, size, type);
+       return __is_valid_access(off, size);
 }
 
 static bool lwt_is_valid_access(int off, int size,
@@ -2815,7 +2815,7 @@ static bool lwt_is_valid_access(int off, int size,
                break;
        }
 
-       return __is_valid_access(off, size, type);
+       return __is_valid_access(off, size);
 }
 
 static bool sock_filter_is_valid_access(int off, int size,
@@ -2833,11 +2833,9 @@ static bool sock_filter_is_valid_access(int off, int size,
 
        if (off < 0 || off + size > sizeof(struct bpf_sock))
                return false;
-
        /* The verifier guarantees that size > 0. */
        if (off % size != 0)
                return false;
-
        if (size != sizeof(__u32))
                return false;
 
@@ -2910,11 +2908,10 @@ static bool tc_cls_act_is_valid_access(int off, int size,
                break;
        }
 
-       return __is_valid_access(off, size, type);
+       return __is_valid_access(off, size);
 }
 
-static bool __is_valid_xdp_access(int off, int size,
-                                 enum bpf_access_type type)
+static bool __is_valid_xdp_access(int off, int size)
 {
        if (off < 0 || off >= sizeof(struct xdp_md))
                return false;
@@ -2942,7 +2939,7 @@ static bool xdp_is_valid_access(int off, int size,
                break;
        }
 
-       return __is_valid_xdp_access(off, size, type);
+       return __is_valid_xdp_access(off, size);
 }
 
 void bpf_warn_invalid_xdp_action(u32 act)