1// SPDX-License-Identifier: GPL-2.0
  2#include <stdbool.h>
  3#include <linux/err.h>
  4#include <linux/string.h>
  5#include <sys/types.h>
  6#include <sys/stat.h>
  7#include <fcntl.h>
  8#include "evlist.h"
  9#include "evsel.h"
 10#include "thread_map.h"
 11#include "record.h"
 12#include "tests.h"
 13#include "debug.h"
 14#include "util/mmap.h"
 15#include <errno.h>
 16#include <perf/mmap.h>
 17#include "util/sample.h"
 18
 19#ifndef O_DIRECTORY
 20#define O_DIRECTORY    00200000
 21#endif
 22#ifndef AT_FDCWD
 23#define AT_FDCWD       -100
 24#endif
 25
 26static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused,
 27					  int subtest __maybe_unused)
 28{
 29	struct record_opts opts = {
 30		.target = {
 31			.uid = UINT_MAX,
 32			.uses_mmap = true,
 33		},
 34		.no_buffering = true,
 35		.freq	      = 1,
 36		.mmap_pages   = 256,
 37		.raw_samples  = true,
 38	};
 39	const char *filename = "/etc/passwd";
 40	int flags = O_RDONLY | O_DIRECTORY;
 41	struct evlist *evlist = evlist__new();
 42	struct evsel *evsel;
 43	int ret = TEST_FAIL, err, i, nr_events = 0, nr_polls = 0;
 44	char sbuf[STRERR_BUFSIZE];
 45
 46	if (evlist == NULL) {
 47		pr_debug("%s: evlist__new\n", __func__);
 48		goto out;
 49	}
 50
 51	evsel = evsel__newtp("syscalls", "sys_enter_openat");
 52	if (IS_ERR(evsel)) {
 53		pr_debug("%s: evsel__newtp\n", __func__);
 54		ret = PTR_ERR(evsel) == -EACCES ? TEST_SKIP : TEST_FAIL;
 55		goto out_delete_evlist;
 56	}
 57
 58	evlist__add(evlist, evsel);
 59
 60	err = evlist__create_maps(evlist, &opts.target);
 61	if (err < 0) {
 62		pr_debug("%s: evlist__create_maps\n", __func__);
 63		goto out_delete_evlist;
 64	}
 65
 66	evsel__config(evsel, &opts, NULL);
 67
 68	perf_thread_map__set_pid(evlist->core.threads, 0, getpid());
 69
 70	err = evlist__open(evlist);
 71	if (err < 0) {
 72		pr_debug("perf_evlist__open: %s\n",
 73			 str_error_r(errno, sbuf, sizeof(sbuf)));
 74		goto out_delete_evlist;
 75	}
 76
 77	err = evlist__mmap(evlist, UINT_MAX);
 78	if (err < 0) {
 79		pr_debug("evlist__mmap: %s\n",
 80			 str_error_r(errno, sbuf, sizeof(sbuf)));
 81		goto out_delete_evlist;
 82	}
 83
 84	evlist__enable(evlist);
 85
 86	/*
 87	 * Generate the event:
 88	 */
 89	openat(AT_FDCWD, filename, flags);
 90
 91	while (1) {
 92		int before = nr_events;
 93
 94		for (i = 0; i < evlist->core.nr_mmaps; i++) {
 95			union perf_event *event;
 96			struct mmap *md;
 97
 98			md = &evlist->mmap[i];
 99			if (perf_mmap__read_init(&md->core) < 0)
100				continue;
101
102			while ((event = perf_mmap__read_event(&md->core)) != NULL) {
103				const u32 type = event->header.type;
104				int tp_flags;
105				struct perf_sample sample;
106
107				++nr_events;
108
109				if (type != PERF_RECORD_SAMPLE) {
110					perf_mmap__consume(&md->core);
111					continue;
112				}
113
114				err = evsel__parse_sample(evsel, event, &sample);
115				if (err) {
116					pr_debug("Can't parse sample, err = %d\n", err);
117					goto out_delete_evlist;
118				}
119
120				tp_flags = evsel__intval(evsel, &sample, "flags");
121
122				if (flags != tp_flags) {
123					pr_debug("%s: Expected flags=%#x, got %#x\n",
124						 __func__, flags, tp_flags);
125					goto out_delete_evlist;
126				}
127
128				goto out_ok;
129			}
130			perf_mmap__read_done(&md->core);
131		}
132
133		if (nr_events == before)
134			evlist__poll(evlist, 10);
135
136		if (++nr_polls > 5) {
137			pr_debug("%s: no events!\n", __func__);
138			goto out_delete_evlist;
139		}
140	}
141out_ok:
142	ret = TEST_OK;
143out_delete_evlist:
144	evlist__delete(evlist);
145out:
146	return ret;
147}
148
149static struct test_case tests__syscall_openat_tp_fields[] = {
150	TEST_CASE_REASON("syscalls:sys_enter_openat event fields",
151			 syscall_openat_tp_fields,
152			 "permissions"),
153	{	.name = NULL, }
154};
155
156struct test_suite suite__syscall_openat_tp_fields = {
157	.desc = "syscalls:sys_enter_openat event fields",
158	.test_cases = tests__syscall_openat_tp_fields,
159};