Merge branch 'convert-tests-to-libbpf'

Andrii Nakryiko says:

====================
There were few more tests and samples that were using custom perf buffer setup
code from trace_helpers.h. This patch set gets rid of all the usages of those
and removes helpers themselves. Libbpf provides nicer, but equally powerful
set of APIs to work with perf ring buffers, so let's have all the samples use

v1->v2:
- make logging message one long line instead of two (Song).
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 0 insertions, 125 deletions

diff --git a/tools/testing/selftests/bpf/trace_helpers.c b/tools/testing/selftests/bpf/trace_helpers.c
index b47f205f0310..7f989b3e4e22 100644
--- a/tools/testing/selftests/bpf/trace_helpers.c
+++ b/tools/testing/selftests/bpf/trace_helpers.c
@@ -86,128 +86,3 @@ long ksym_get_addr(const char *name)
 
 	return 0;
 }
-
-static int page_size;
-static int page_cnt = 8;
-static struct perf_event_mmap_page *header;
-
-int perf_event_mmap_header(int fd, struct perf_event_mmap_page **header)
-{
-	void *base;
-	int mmap_size;
-
-	page_size = getpagesize();
-	mmap_size = page_size * (page_cnt + 1);
-
-	base = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-	if (base == MAP_FAILED) {
-		printf("mmap err\n");
-		return -1;
-	}
-
-	*header = base;
-	return 0;
-}
-
-int perf_event_mmap(int fd)
-{
-	return perf_event_mmap_header(fd, &header);
-}
-
-static int perf_event_poll(int fd)
-{
-	struct pollfd pfd = { .fd = fd, .events = POLLIN };
-
-	return poll(&pfd, 1, 1000);
-}
-
-struct perf_event_sample {
-	struct perf_event_header header;
-	__u32 size;
-	char data[];
-};
-
-static enum bpf_perf_event_ret
-bpf_perf_event_print(struct perf_event_header *hdr, void *private_data)
-{
-	struct perf_event_sample *e = (struct perf_event_sample *)hdr;
-	perf_event_print_fn fn = private_data;
-	int ret;
-
-	if (e->header.type == PERF_RECORD_SAMPLE) {
-		ret = fn(e->data, e->size);
-		if (ret != LIBBPF_PERF_EVENT_CONT)
-			return ret;
-	} else if (e->header.type == PERF_RECORD_LOST) {
-		struct {
-			struct perf_event_header header;
-			__u64 id;
-			__u64 lost;
-		} *lost = (void *) e;
-		printf("lost %lld events\n", lost->lost);
-	} else {
-		printf("unknown event type=%d size=%d\n",
-		       e->header.type, e->header.size);
-	}
-
-	return LIBBPF_PERF_EVENT_CONT;
-}
-
-int perf_event_poller(int fd, perf_event_print_fn output_fn)
-{
-	enum bpf_perf_event_ret ret;
-	void *buf = NULL;
-	size_t len = 0;
-
-	for (;;) {
-		perf_event_poll(fd);
-		ret = bpf_perf_event_read_simple(header, page_cnt * page_size,
-						 page_size, &buf, &len,
-						 bpf_perf_event_print,
-						 output_fn);
-		if (ret != LIBBPF_PERF_EVENT_CONT)
-			break;
-	}
-	free(buf);
-
-	return ret;
-}
-
-int perf_event_poller_multi(int *fds, struct perf_event_mmap_page **headers,
-			    int num_fds, perf_event_print_fn output_fn)
-{
-	enum bpf_perf_event_ret ret;
-	struct pollfd *pfds;
-	void *buf = NULL;
-	size_t len = 0;
-	int i;
-
-	pfds = calloc(num_fds, sizeof(*pfds));
-	if (!pfds)
-		return LIBBPF_PERF_EVENT_ERROR;
-
-	for (i = 0; i < num_fds; i++) {
-		pfds[i].fd = fds[i];
-		pfds[i].events = POLLIN;
-	}
-
-	for (;;) {
-		poll(pfds, num_fds, 1000);
-		for (i = 0; i < num_fds; i++) {
-			if (!pfds[i].revents)
-				continue;
-
-			ret = bpf_perf_event_read_simple(headers[i],
-							 page_cnt * page_size,
-							 page_size, &buf, &len,
-							 bpf_perf_event_print,
-							 output_fn);
-			if (ret != LIBBPF_PERF_EVENT_CONT)
-				break;
-		}
-	}
-	free(buf);
-	free(pfds);
-
-	return ret;
-}