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bpf: add selftest for lirc_mode2 type program

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This is simple test over rc-loopback.

Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Sean Young
2018-05-27 12:24:10 +01:00
committed by Daniel Borkmann
parent f4364dcfc8
commit 6bdd533cee
10 changed files with 494 additions and 17 deletions
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79
tools/include/uapi/linux/bpf.h
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@@ -143,6 +143,7 @@ enum bpf_prog_type {
BPF_PROG_TYPE_RAW_TRACEPOINT,
BPF_PROG_TYPE_CGROUP_SOCK_ADDR,
BPF_PROG_TYPE_LWT_SEG6LOCAL,
BPF_PROG_TYPE_LIRC_MODE2,
};
enum bpf_attach_type {
@@ -162,6 +163,7 @@ enum bpf_attach_type {
BPF_CGROUP_INET6_POST_BIND,
BPF_CGROUP_UDP4_SENDMSG,
BPF_CGROUP_UDP6_SENDMSG,
BPF_LIRC_MODE2,
__MAX_BPF_ATTACH_TYPE
};
@@ -1852,10 +1854,10 @@ union bpf_attr {
* If lookup is successful and result shows packet is to be
* forwarded, the neighbor tables are searched for the nexthop.
* If successful (ie., FIB lookup shows forwarding and nexthop
* is resolved), the nexthop address is returned in ipv4_dst,
* ipv6_dst or mpls_out based on family, smac is set to mac
* address of egress device, dmac is set to nexthop mac address,
* rt_metric is set to metric from route.
* is resolved), the nexthop address is returned in ipv4_dst
* or ipv6_dst based on family, smac is set to mac address of
* egress device, dmac is set to nexthop mac address, rt_metric
* is set to metric from route (IPv4/IPv6 only).
*
* *plen* argument is the size of the passed in struct.
* *flags* argument can be a combination of one or more of the
@@ -2005,6 +2007,53 @@ union bpf_attr {
* direct packet access.
* Return
* 0 on success, or a negative error in case of failure.
*
* int bpf_rc_keydown(void *ctx, u32 protocol, u64 scancode, u32 toggle)
* Description
* This helper is used in programs implementing IR decoding, to
* report a successfully decoded key press with *scancode*,
* *toggle* value in the given *protocol*. The scancode will be
* translated to a keycode using the rc keymap, and reported as
* an input key down event. After a period a key up event is
* generated. This period can be extended by calling either
* **bpf_rc_keydown** () again with the same values, or calling
* **bpf_rc_repeat** ().
*
* Some protocols include a toggle bit, in case the button was
* released and pressed again between consecutive scancodes.
*
* The *ctx* should point to the lirc sample as passed into
* the program.
*
* The *protocol* is the decoded protocol number (see
* **enum rc_proto** for some predefined values).
*
* This helper is only available is the kernel was compiled with
* the **CONFIG_BPF_LIRC_MODE2** configuration option set to
* "**y**".
*
* Return
* 0
*
* int bpf_rc_repeat(void *ctx)
* Description
* This helper is used in programs implementing IR decoding, to
* report a successfully decoded repeat key message. This delays
* the generation of a key up event for previously generated
* key down event.
*
* Some IR protocols like NEC have a special IR message for
* repeating last button, for when a button is held down.
*
* The *ctx* should point to the lirc sample as passed into
* the program.
*
* This helper is only available is the kernel was compiled with
* the **CONFIG_BPF_LIRC_MODE2** configuration option set to
* "**y**".
*
* Return
* 0
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@@ -2083,7 +2132,9 @@ union bpf_attr {
FN(lwt_push_encap), \
FN(lwt_seg6_store_bytes), \
FN(lwt_seg6_adjust_srh), \
FN(lwt_seg6_action),
FN(lwt_seg6_action), \
FN(rc_repeat), \
FN(rc_keydown),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call
@@ -2537,8 +2588,10 @@ struct bpf_raw_tracepoint_args {
#define BPF_FIB_LOOKUP_OUTPUT BIT(1)
struct bpf_fib_lookup {
/* input */
__u8 family; /* network family, AF_INET, AF_INET6, AF_MPLS */
/* input: network family for lookup (AF_INET, AF_INET6)
* output: network family of egress nexthop
*/
__u8 family;
/* set if lookup is to consider L4 data - e.g., FIB rules */
__u8 l4_protocol;
@@ -2554,22 +2607,20 @@ struct bpf_fib_lookup {
__u8 tos; /* AF_INET */
__be32 flowlabel; /* AF_INET6 */
/* output: metric of fib result */
__u32 rt_metric;
/* output: metric of fib result (IPv4/IPv6 only) */
__u32 rt_metric;
};
union {
__be32 mpls_in;
__be32 ipv4_src;
__u32 ipv6_src[4]; /* in6_addr; network order */
};
/* input to bpf_fib_lookup, *dst is destination address.
* output: bpf_fib_lookup sets to gateway address
/* input to bpf_fib_lookup, ipv{4,6}_dst is destination address in
* network header. output: bpf_fib_lookup sets to gateway address
* if FIB lookup returns gateway route
*/
union {
/* return for MPLS lookups */
__be32 mpls_out[4]; /* support up to 4 labels */
__be32 ipv4_dst;
__u32 ipv6_dst[4]; /* in6_addr; network order */
};