diff options
Diffstat (limited to 'samples/bpf/xdp_sample_user.h')
| -rw-r--r-- | samples/bpf/xdp_sample_user.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/samples/bpf/xdp_sample_user.h b/samples/bpf/xdp_sample_user.h new file mode 100644 index 000000000000..d97465ff8c62 --- /dev/null +++ b/samples/bpf/xdp_sample_user.h @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0-only +#ifndef XDP_SAMPLE_USER_H +#define XDP_SAMPLE_USER_H + +#include <bpf/libbpf.h> +#include <linux/compiler.h> + +#include "xdp_sample_shared.h" + +enum stats_mask { + _SAMPLE_REDIRECT_MAP = 1U << 0, + SAMPLE_RX_CNT = 1U << 1, + SAMPLE_REDIRECT_ERR_CNT = 1U << 2, + SAMPLE_CPUMAP_ENQUEUE_CNT = 1U << 3, + SAMPLE_CPUMAP_KTHREAD_CNT = 1U << 4, + SAMPLE_EXCEPTION_CNT = 1U << 5, + SAMPLE_DEVMAP_XMIT_CNT = 1U << 6, + SAMPLE_REDIRECT_CNT = 1U << 7, + SAMPLE_REDIRECT_MAP_CNT = SAMPLE_REDIRECT_CNT | _SAMPLE_REDIRECT_MAP, + SAMPLE_REDIRECT_ERR_MAP_CNT = SAMPLE_REDIRECT_ERR_CNT | _SAMPLE_REDIRECT_MAP, + SAMPLE_DEVMAP_XMIT_CNT_MULTI = 1U << 8, + SAMPLE_SKIP_HEADING = 1U << 9, +}; + +/* Exit return codes */ +#define EXIT_OK 0 +#define EXIT_FAIL 1 +#define EXIT_FAIL_OPTION 2 +#define EXIT_FAIL_XDP 3 +#define EXIT_FAIL_BPF 4 +#define EXIT_FAIL_MEM 5 + +int sample_setup_maps(struct bpf_map **maps); +int __sample_init(int mask); +void sample_exit(int status); +int sample_run(int interval, void (*post_cb)(void *), void *ctx); + +void sample_switch_mode(void); +int sample_install_xdp(struct bpf_program *xdp_prog, int ifindex, bool generic, + bool force); +void sample_usage(char *argv[], const struct option *long_options, + const char *doc, int mask, bool error); + +const char *get_driver_name(int ifindex); +int get_mac_addr(int ifindex, void *mac_addr); + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wstringop-truncation" +__attribute__((unused)) +static inline char *safe_strncpy(char *dst, const char *src, size_t size) +{ + if (!size) + return dst; + strncpy(dst, src, size - 1); + dst[size - 1] = '\0'; + return dst; +} +#pragma GCC diagnostic pop + +#define __attach_tp(name) \ + ({ \ + if (!bpf_program__is_tracing(skel->progs.name)) \ + return -EINVAL; \ + skel->links.name = bpf_program__attach(skel->progs.name); \ + if (!skel->links.name) \ + return -errno; \ + }) + +#define sample_init_pre_load(skel) \ + ({ \ + skel->rodata->nr_cpus = libbpf_num_possible_cpus(); \ + sample_setup_maps((struct bpf_map *[]){ \ + skel->maps.rx_cnt, skel->maps.redir_err_cnt, \ + skel->maps.cpumap_enqueue_cnt, \ + skel->maps.cpumap_kthread_cnt, \ + skel->maps.exception_cnt, skel->maps.devmap_xmit_cnt, \ + skel->maps.devmap_xmit_cnt_multi }); \ + }) + +#define DEFINE_SAMPLE_INIT(name) \ + static int sample_init(struct name *skel, int mask) \ + { \ + int ret; \ + ret = __sample_init(mask); \ + if (ret < 0) \ + return ret; \ + if (mask & SAMPLE_REDIRECT_MAP_CNT) \ + __attach_tp(tp_xdp_redirect_map); \ + if (mask & SAMPLE_REDIRECT_CNT) \ + __attach_tp(tp_xdp_redirect); \ + if (mask & SAMPLE_REDIRECT_ERR_MAP_CNT) \ + __attach_tp(tp_xdp_redirect_map_err); \ + if (mask & SAMPLE_REDIRECT_ERR_CNT) \ + __attach_tp(tp_xdp_redirect_err); \ + if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT) \ + __attach_tp(tp_xdp_cpumap_enqueue); \ + if (mask & SAMPLE_CPUMAP_KTHREAD_CNT) \ + __attach_tp(tp_xdp_cpumap_kthread); \ + if (mask & SAMPLE_EXCEPTION_CNT) \ + __attach_tp(tp_xdp_exception); \ + if (mask & SAMPLE_DEVMAP_XMIT_CNT) \ + __attach_tp(tp_xdp_devmap_xmit); \ + if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) \ + __attach_tp(tp_xdp_devmap_xmit_multi); \ + return 0; \ + } + +#endif |