1 files changed, 38 insertions, 6 deletions

diff --git a/include/linux/filter.h b/include/linux/filter.h
index d358d1815c16..45fc0f5000d8 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -289,8 +289,21 @@ struct xdp_buff;
 		.off   = OFF,					\
 		.imm   = 0 })
 
+/* Relative call */
+
+#define BPF_CALL_REL(TGT)					\
+	((struct bpf_insn) {					\
+		.code  = BPF_JMP | BPF_CALL,			\
+		.dst_reg = 0,					\
+		.src_reg = BPF_PSEUDO_CALL,			\
+		.off   = 0,					\
+		.imm   = TGT })
+
 /* Function call */
 
+#define BPF_CAST_CALL(x)					\
+		((u64 (*)(u64, u64, u64, u64, u64))(x))
+
 #define BPF_EMIT_CALL(FUNC)					\
 	((struct bpf_insn) {					\
 		.code  = BPF_JMP | BPF_CALL,			\
@@ -626,16 +639,34 @@ static inline bool bpf_prog_was_classic(const struct bpf_prog *prog)
 	return prog->type == BPF_PROG_TYPE_UNSPEC;
 }
 
-static inline bool
-bpf_ctx_narrow_access_ok(u32 off, u32 size, const u32 size_default)
+static inline u32 bpf_ctx_off_adjust_machine(u32 size)
+{
+	const u32 size_machine = sizeof(unsigned long);
+
+	if (size > size_machine && size % size_machine == 0)
+		size = size_machine;
+
+	return size;
+}
+
+static inline bool bpf_ctx_narrow_align_ok(u32 off, u32 size_access,
+					   u32 size_default)
 {
-	bool off_ok;
+	size_default = bpf_ctx_off_adjust_machine(size_default);
+	size_access  = bpf_ctx_off_adjust_machine(size_access);
+
 #ifdef __LITTLE_ENDIAN
-	off_ok = (off & (size_default - 1)) == 0;
+	return (off & (size_default - 1)) == 0;
 #else
-	off_ok = (off & (size_default - 1)) + size == size_default;
+	return (off & (size_default - 1)) + size_access == size_default;
 #endif
-	return off_ok && size <= size_default && (size & (size - 1)) == 0;
+}
+
+static inline bool
+bpf_ctx_narrow_access_ok(u32 off, u32 size, u32 size_default)
+{
+	return bpf_ctx_narrow_align_ok(off, size, size_default) &&
+	       size <= size_default && (size & (size - 1)) == 0;
 }
 
 #define bpf_classic_proglen(fprog) (fprog->len * sizeof(fprog->filter[0]))
@@ -1010,6 +1041,7 @@ struct bpf_sock_addr_kern {
 	 * only two (src and dst) are available at convert_ctx_access time
 	 */
 	u64 tmp_reg;
+	void *t_ctx;	/* Attach type specific context. */
 };
 
 struct bpf_sock_ops_kern {