[PATCH 1/9] bpf: prepare for moving map common stuff into one place
From: Ming Lei <tom.leiming@gmail.com>
Date: 2016-01-11 15:57:19
Also in:
lkml
Subsystem:
bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
This patch introduces some nop functions of map callback for use in all map implementation. Signed-off-by: Ming Lei <tom.leiming@gmail.com> --- kernel/bpf/Makefile | 2 +- kernel/bpf/bpf_map.h | 9 +++++++++ kernel/bpf/map.c | 26 ++++++++++++++++++++++++++ 3 files changed, 36 insertions(+), 1 deletion(-) create mode 100644 kernel/bpf/bpf_map.h create mode 100644 kernel/bpf/map.c
diff --git a/kernel/bpf/Makefile b/kernel/bpf/Makefile
index 13272582..191d54b 100644
--- a/kernel/bpf/Makefile
+++ b/kernel/bpf/Makefile@@ -1,4 +1,4 @@ obj-y := core.o obj-$(CONFIG_BPF_SYSCALL) += syscall.o verifier.o inode.o helpers.o -obj-$(CONFIG_BPF_SYSCALL) += hashtab.o arraymap.o +obj-$(CONFIG_BPF_SYSCALL) += map.o hashtab.o arraymap.o
diff --git a/kernel/bpf/bpf_map.h b/kernel/bpf/bpf_map.h
new file mode 100644
index 0000000..7e596c1
--- /dev/null
+++ b/kernel/bpf/bpf_map.h@@ -0,0 +1,9 @@ +#ifndef INT_BPF_MAP_COMMON_H +#define INT_BPF_MAP_COMMON_H + +#include <linux/bpf.h> + +extern void *map_lookup_elem_nop(struct bpf_map *map, void *key); +extern int map_delete_elem_nop(struct bpf_map *map, void *key); + +#endif
diff --git a/kernel/bpf/map.c b/kernel/bpf/map.c
new file mode 100644
index 0000000..bf113fb
--- /dev/null
+++ b/kernel/bpf/map.c@@ -0,0 +1,26 @@ +/* + * bpf map common stuff + * + * Copyright (c) 2016 Ming Lei + * + * Authors: + * Ming Lei <tom.leiming@gmail.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/bpf.h> + +void *map_lookup_elem_nop(struct bpf_map *map, void *key) +{ + return NULL; +} + +int map_delete_elem_nop(struct bpf_map *map, void *key) +{ + return -EINVAL; +} +
--
1.9.1