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594a116b2a
Use the libbpf skeleton facility and other utilities provided by XDP samples helper. Also adapt to change of type of mac address map, so that no resizing is required. Add a new flag for sample mask that skips priting the from_device->to_device heading for each line, as xdp_redirect_map_multi may have two devices but the flow of data may be bidirectional, so the output would be confusing. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210821002010.845777-23-memxor@gmail.com
108 lines
4.4 KiB
C
108 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#ifndef XDP_SAMPLE_USER_H
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#define XDP_SAMPLE_USER_H
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#include <bpf/libbpf.h>
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#include <linux/compiler.h>
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#include "xdp_sample_shared.h"
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enum stats_mask {
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_SAMPLE_REDIRECT_MAP = 1U << 0,
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SAMPLE_RX_CNT = 1U << 1,
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SAMPLE_REDIRECT_ERR_CNT = 1U << 2,
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SAMPLE_CPUMAP_ENQUEUE_CNT = 1U << 3,
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SAMPLE_CPUMAP_KTHREAD_CNT = 1U << 4,
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SAMPLE_EXCEPTION_CNT = 1U << 5,
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SAMPLE_DEVMAP_XMIT_CNT = 1U << 6,
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SAMPLE_REDIRECT_CNT = 1U << 7,
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SAMPLE_REDIRECT_MAP_CNT = SAMPLE_REDIRECT_CNT | _SAMPLE_REDIRECT_MAP,
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SAMPLE_REDIRECT_ERR_MAP_CNT = SAMPLE_REDIRECT_ERR_CNT | _SAMPLE_REDIRECT_MAP,
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SAMPLE_DEVMAP_XMIT_CNT_MULTI = 1U << 8,
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SAMPLE_SKIP_HEADING = 1U << 9,
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};
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/* Exit return codes */
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#define EXIT_OK 0
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#define EXIT_FAIL 1
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#define EXIT_FAIL_OPTION 2
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#define EXIT_FAIL_XDP 3
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#define EXIT_FAIL_BPF 4
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#define EXIT_FAIL_MEM 5
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int sample_setup_maps(struct bpf_map **maps);
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int __sample_init(int mask);
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void sample_exit(int status);
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int sample_run(int interval, void (*post_cb)(void *), void *ctx);
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void sample_switch_mode(void);
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int sample_install_xdp(struct bpf_program *xdp_prog, int ifindex, bool generic,
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bool force);
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void sample_usage(char *argv[], const struct option *long_options,
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const char *doc, int mask, bool error);
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const char *get_driver_name(int ifindex);
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int get_mac_addr(int ifindex, void *mac_addr);
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wstringop-truncation"
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__attribute__((unused))
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static inline char *safe_strncpy(char *dst, const char *src, size_t size)
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{
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if (!size)
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return dst;
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strncpy(dst, src, size - 1);
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dst[size - 1] = '\0';
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return dst;
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}
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#pragma GCC diagnostic pop
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#define __attach_tp(name) \
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({ \
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if (!bpf_program__is_tracing(skel->progs.name)) \
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return -EINVAL; \
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skel->links.name = bpf_program__attach(skel->progs.name); \
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if (!skel->links.name) \
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return -errno; \
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})
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#define sample_init_pre_load(skel) \
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({ \
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skel->rodata->nr_cpus = libbpf_num_possible_cpus(); \
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sample_setup_maps((struct bpf_map *[]){ \
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skel->maps.rx_cnt, skel->maps.redir_err_cnt, \
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skel->maps.cpumap_enqueue_cnt, \
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skel->maps.cpumap_kthread_cnt, \
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skel->maps.exception_cnt, skel->maps.devmap_xmit_cnt, \
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skel->maps.devmap_xmit_cnt_multi }); \
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})
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#define DEFINE_SAMPLE_INIT(name) \
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static int sample_init(struct name *skel, int mask) \
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{ \
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int ret; \
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ret = __sample_init(mask); \
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if (ret < 0) \
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return ret; \
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if (mask & SAMPLE_REDIRECT_MAP_CNT) \
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__attach_tp(tp_xdp_redirect_map); \
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if (mask & SAMPLE_REDIRECT_CNT) \
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__attach_tp(tp_xdp_redirect); \
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if (mask & SAMPLE_REDIRECT_ERR_MAP_CNT) \
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__attach_tp(tp_xdp_redirect_map_err); \
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if (mask & SAMPLE_REDIRECT_ERR_CNT) \
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__attach_tp(tp_xdp_redirect_err); \
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if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT) \
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__attach_tp(tp_xdp_cpumap_enqueue); \
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if (mask & SAMPLE_CPUMAP_KTHREAD_CNT) \
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__attach_tp(tp_xdp_cpumap_kthread); \
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if (mask & SAMPLE_EXCEPTION_CNT) \
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__attach_tp(tp_xdp_exception); \
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if (mask & SAMPLE_DEVMAP_XMIT_CNT) \
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__attach_tp(tp_xdp_devmap_xmit); \
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if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) \
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__attach_tp(tp_xdp_devmap_xmit_multi); \
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return 0; \
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}
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#endif
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