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author | 2018-02-19 11:16:57 +0000 | |
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committer | 2018-02-19 11:17:28 +0000 | |
commit | ca33590b6af032bff57d9cc70455660466a654b2 (patch) | |
tree | 0b68b090bd9b4a78a3614b62400b29279d76d553 /drivers/net/tap/tap_bpf.h | |
parent | 169a9de21e263aa6599cdc2d87a45ae158d9f509 (diff) |
New upstream version 18.02upstream/18.02
Change-Id: I89ed24cb2a49b78fe5be6970b99dd46c1499fcc3
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Diffstat (limited to 'drivers/net/tap/tap_bpf.h')
-rw-r--r-- | drivers/net/tap/tap_bpf.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/drivers/net/tap/tap_bpf.h b/drivers/net/tap/tap_bpf.h new file mode 100644 index 00000000..1a70ffe2 --- /dev/null +++ b/drivers/net/tap/tap_bpf.h @@ -0,0 +1,117 @@ +/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 + * Copyright 2017 Mellanox Technologies, Ltd. + */ + +#ifndef __TAP_BPF_H__ +#define __TAP_BPF_H__ + +#include <tap_autoconf.h> + +/* Do not #include <linux/bpf.h> since eBPF must compile on different + * distros which may include partial definitions for eBPF (while the + * kernel itself may support eBPF). Instead define here all that is needed + */ + +/* BPF_MAP_UPDATE_ELEM command flags */ +#define BPF_ANY 0 /* create a new element or update an existing */ + +/* BPF architecture instruction struct */ +struct bpf_insn { + __u8 code; + __u8 dst_reg:4; + __u8 src_reg:4; + __s16 off; + __s32 imm; /* immediate value */ +}; + +/* BPF program types */ +enum bpf_prog_type { + BPF_PROG_TYPE_UNSPEC, + BPF_PROG_TYPE_SOCKET_FILTER, + BPF_PROG_TYPE_KPROBE, + BPF_PROG_TYPE_SCHED_CLS, + BPF_PROG_TYPE_SCHED_ACT, +}; + +/* BPF commands types */ +enum bpf_cmd { + BPF_MAP_CREATE, + BPF_MAP_LOOKUP_ELEM, + BPF_MAP_UPDATE_ELEM, + BPF_MAP_DELETE_ELEM, + BPF_MAP_GET_NEXT_KEY, + BPF_PROG_LOAD, +}; + +/* BPF maps types */ +enum bpf_map_type { + BPF_MAP_TYPE_UNSPEC, + BPF_MAP_TYPE_HASH, +}; + +/* union of anonymous structs used with TAP BPF commands */ +union bpf_attr { + /* BPF_MAP_CREATE command */ + struct { + __u32 map_type; + __u32 key_size; + __u32 value_size; + __u32 max_entries; + __u32 map_flags; + __u32 inner_map_fd; + }; + + /* BPF_MAP_UPDATE_ELEM, BPF_MAP_DELETE_ELEM commands */ + struct { + __u32 map_fd; + __aligned_u64 key; + union { + __aligned_u64 value; + __aligned_u64 next_key; + }; + __u64 flags; + }; + + /* BPF_PROG_LOAD command */ + struct { + __u32 prog_type; + __u32 insn_cnt; + __aligned_u64 insns; + __aligned_u64 license; + __u32 log_level; + __u32 log_size; + __aligned_u64 log_buf; + __u32 kern_version; + __u32 prog_flags; + }; +} __attribute__((aligned(8))); + +#ifndef __NR_bpf +# if defined(__i386__) +# define __NR_bpf 357 +# elif defined(__x86_64__) +# define __NR_bpf 321 +# elif defined(__arm__) +# define __NR_bpf 386 +# elif defined(__aarch64__) +# define __NR_bpf 280 +# elif defined(__sparc__) +# define __NR_bpf 349 +# elif defined(__s390__) +# define __NR_bpf 351 +# elif defined(__powerpc__) +# define __NR_bpf 361 +# else +# error __NR_bpf not defined +# endif +#endif + +enum { + BPF_MAP_ID_KEY, + BPF_MAP_ID_SIMPLE, +}; + +static int bpf_load(enum bpf_prog_type type, const struct bpf_insn *insns, + size_t insns_cnt, const char *license); + +#endif /* __TAP_BPF_H__ */ |