1178173Simp// SPDX-License-Identifier: GPL-2.0-only
2178173Simp#ifndef XDP_SAMPLE_USER_H
3178173Simp#define XDP_SAMPLE_USER_H
4178173Simp
5178173Simp#include <bpf/libbpf.h>
6178173Simp#include <linux/compiler.h>
7178173Simp
8178173Simp#include "xdp_sample_shared.h"
9178173Simp
10178173Simpenum stats_mask {
11178173Simp	_SAMPLE_REDIRECT_MAP         = 1U << 0,
12178173Simp	SAMPLE_RX_CNT                = 1U << 1,
13178173Simp	SAMPLE_REDIRECT_ERR_CNT      = 1U << 2,
14178173Simp	SAMPLE_CPUMAP_ENQUEUE_CNT    = 1U << 3,
15178173Simp	SAMPLE_CPUMAP_KTHREAD_CNT    = 1U << 4,
16178173Simp	SAMPLE_EXCEPTION_CNT         = 1U << 5,
17178173Simp	SAMPLE_DEVMAP_XMIT_CNT       = 1U << 6,
18178173Simp	SAMPLE_REDIRECT_CNT          = 1U << 7,
19178173Simp	SAMPLE_REDIRECT_MAP_CNT      = SAMPLE_REDIRECT_CNT | _SAMPLE_REDIRECT_MAP,
20178173Simp	SAMPLE_REDIRECT_ERR_MAP_CNT  = SAMPLE_REDIRECT_ERR_CNT | _SAMPLE_REDIRECT_MAP,
21178173Simp	SAMPLE_DEVMAP_XMIT_CNT_MULTI = 1U << 8,
22178173Simp	SAMPLE_SKIP_HEADING	     = 1U << 9,
23178173Simp};
24178173Simp
25178173Simp/* Exit return codes */
26178173Simp#define EXIT_OK			0
27178173Simp#define EXIT_FAIL		1
28178173Simp#define EXIT_FAIL_OPTION	2
29178173Simp#define EXIT_FAIL_XDP		3
30178173Simp#define EXIT_FAIL_BPF		4
31178173Simp#define EXIT_FAIL_MEM		5
32178173Simp
33178173Simpint sample_setup_maps(struct bpf_map **maps);
34178173Simpint __sample_init(int mask);
35178173Simpvoid sample_exit(int status);
36178173Simpint sample_run(int interval, void (*post_cb)(void *), void *ctx);
37
38void sample_switch_mode(void);
39int sample_install_xdp(struct bpf_program *xdp_prog, int ifindex, bool generic,
40		       bool force);
41void sample_usage(char *argv[], const struct option *long_options,
42		  const char *doc, int mask, bool error);
43
44const char *get_driver_name(int ifindex);
45int get_mac_addr(int ifindex, void *mac_addr);
46
47#pragma GCC diagnostic push
48#ifndef __clang__
49#pragma GCC diagnostic ignored "-Wstringop-truncation"
50#endif
51__attribute__((unused))
52static inline char *safe_strncpy(char *dst, const char *src, size_t size)
53{
54	if (!size)
55		return dst;
56	strncpy(dst, src, size - 1);
57	dst[size - 1] = '\0';
58	return dst;
59}
60#pragma GCC diagnostic pop
61
62#define __attach_tp(name)                                                      \
63	({                                                                     \
64		if (bpf_program__type(skel->progs.name) != BPF_PROG_TYPE_TRACING)\
65			return -EINVAL;                                        \
66		skel->links.name = bpf_program__attach(skel->progs.name);      \
67		if (!skel->links.name)                                         \
68			return -errno;                                         \
69	})
70
71#define sample_init_pre_load(skel)                                             \
72	({                                                                     \
73		skel->rodata->nr_cpus = libbpf_num_possible_cpus();            \
74		sample_setup_maps((struct bpf_map *[]){                        \
75			skel->maps.rx_cnt, skel->maps.redir_err_cnt,           \
76			skel->maps.cpumap_enqueue_cnt,                         \
77			skel->maps.cpumap_kthread_cnt,                         \
78			skel->maps.exception_cnt, skel->maps.devmap_xmit_cnt,  \
79			skel->maps.devmap_xmit_cnt_multi });                   \
80	})
81
82#define DEFINE_SAMPLE_INIT(name)                                               \
83	static int sample_init(struct name *skel, int mask)                    \
84	{                                                                      \
85		int ret;                                                       \
86		ret = __sample_init(mask);                                     \
87		if (ret < 0)                                                   \
88			return ret;                                            \
89		if (mask & SAMPLE_REDIRECT_MAP_CNT)                            \
90			__attach_tp(tp_xdp_redirect_map);                      \
91		if (mask & SAMPLE_REDIRECT_CNT)                                \
92			__attach_tp(tp_xdp_redirect);                          \
93		if (mask & SAMPLE_REDIRECT_ERR_MAP_CNT)                        \
94			__attach_tp(tp_xdp_redirect_map_err);                  \
95		if (mask & SAMPLE_REDIRECT_ERR_CNT)                            \
96			__attach_tp(tp_xdp_redirect_err);                      \
97		if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT)                          \
98			__attach_tp(tp_xdp_cpumap_enqueue);                    \
99		if (mask & SAMPLE_CPUMAP_KTHREAD_CNT)                          \
100			__attach_tp(tp_xdp_cpumap_kthread);                    \
101		if (mask & SAMPLE_EXCEPTION_CNT)                               \
102			__attach_tp(tp_xdp_exception);                         \
103		if (mask & SAMPLE_DEVMAP_XMIT_CNT)                             \
104			__attach_tp(tp_xdp_devmap_xmit);                       \
105		if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI)                       \
106			__attach_tp(tp_xdp_devmap_xmit_multi);                 \
107		return 0;                                                      \
108	}
109
110#endif
111