22adedd304
Add two new helper functions to trace_helpers that supports polling multiple perf file descriptors for events. These are used to the XDP perf_event_output example, which needs to work with one perf fd per CPU. Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
26 lines
727 B
C
26 lines
727 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __TRACE_HELPER_H
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#define __TRACE_HELPER_H
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#include <libbpf.h>
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#include <linux/perf_event.h>
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struct ksym {
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long addr;
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char *name;
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};
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int load_kallsyms(void);
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struct ksym *ksym_search(long key);
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long ksym_get_addr(const char *name);
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typedef enum bpf_perf_event_ret (*perf_event_print_fn)(void *data, int size);
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int perf_event_mmap(int fd);
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int perf_event_mmap_header(int fd, struct perf_event_mmap_page **header);
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/* return LIBBPF_PERF_EVENT_DONE or LIBBPF_PERF_EVENT_ERROR */
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int perf_event_poller(int fd, perf_event_print_fn output_fn);
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int perf_event_poller_multi(int *fds, struct perf_event_mmap_page **headers,
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int num_fds, perf_event_print_fn output_fn);
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#endif
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