1// SPDX-License-Identifier: GPL-2.0
2#include "parse-events.h"
3#include "pmu.h"
4#include "tests.h"
5#include <errno.h>
6#include <fcntl.h>
7#include <stdio.h>
8#include <linux/kernel.h>
9#include <linux/limits.h>
10#include <linux/zalloc.h>
11
12/* Simulated format definitions. */
13static struct test_format {
14	const char *name;
15	const char *value;
16} test_formats[] = {
17	{ "krava01", "config:0-1,62-63\n", },
18	{ "krava02", "config:10-17\n", },
19	{ "krava03", "config:5\n", },
20	{ "krava11", "config1:0,2,4,6,8,20-28\n", },
21	{ "krava12", "config1:63\n", },
22	{ "krava13", "config1:45-47\n", },
23	{ "krava21", "config2:0-3,10-13,20-23,30-33,40-43,50-53,60-63\n", },
24	{ "krava22", "config2:8,18,48,58\n", },
25	{ "krava23", "config2:28-29,38\n", },
26};
27
28/* Simulated users input. */
29static struct parse_events_term test_terms[] = {
30	{
31		.config    = "krava01",
32		.val.num   = 15,
33		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
34		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
35	},
36	{
37		.config    = "krava02",
38		.val.num   = 170,
39		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
40		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
41	},
42	{
43		.config    = "krava03",
44		.val.num   = 1,
45		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
46		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
47	},
48	{
49		.config    = "krava11",
50		.val.num   = 27,
51		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
52		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
53	},
54	{
55		.config    = "krava12",
56		.val.num   = 1,
57		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
58		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
59	},
60	{
61		.config    = "krava13",
62		.val.num   = 2,
63		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
64		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
65	},
66	{
67		.config    = "krava21",
68		.val.num   = 119,
69		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
70		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
71	},
72	{
73		.config    = "krava22",
74		.val.num   = 11,
75		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
76		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
77	},
78	{
79		.config    = "krava23",
80		.val.num   = 2,
81		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
82		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
83	},
84};
85
86/*
87 * Prepare format directory data, exported by kernel
88 * at /sys/bus/event_source/devices/<dev>/format.
89 */
90static char *test_format_dir_get(char *dir, size_t sz)
91{
92	unsigned int i;
93
94	snprintf(dir, sz, "/tmp/perf-pmu-test-format-XXXXXX");
95	if (!mkdtemp(dir))
96		return NULL;
97
98	for (i = 0; i < ARRAY_SIZE(test_formats); i++) {
99		char name[PATH_MAX];
100		struct test_format *format = &test_formats[i];
101		FILE *file;
102
103		scnprintf(name, PATH_MAX, "%s/%s", dir, format->name);
104
105		file = fopen(name, "w");
106		if (!file)
107			return NULL;
108
109		if (1 != fwrite(format->value, strlen(format->value), 1, file))
110			break;
111
112		fclose(file);
113	}
114
115	return dir;
116}
117
118/* Cleanup format directory. */
119static int test_format_dir_put(char *dir)
120{
121	char buf[PATH_MAX + 20];
122
123	snprintf(buf, sizeof(buf), "rm -f %s/*\n", dir);
124	if (system(buf))
125		return -1;
126
127	snprintf(buf, sizeof(buf), "rmdir %s\n", dir);
128	return system(buf);
129}
130
131static void add_test_terms(struct parse_events_terms *terms)
132{
133	unsigned int i;
134
135	for (i = 0; i < ARRAY_SIZE(test_terms); i++) {
136		struct parse_events_term *clone;
137
138		parse_events_term__clone(&clone, &test_terms[i]);
139		list_add_tail(&clone->list, &terms->terms);
140	}
141}
142
143static int test__pmu(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
144{
145	char dir[PATH_MAX];
146	char *format;
147	struct parse_events_terms terms;
148	struct perf_event_attr attr;
149	struct perf_pmu *pmu;
150	int fd;
151	int ret;
152
153	parse_events_terms__init(&terms);
154	add_test_terms(&terms);
155	pmu = zalloc(sizeof(*pmu));
156	if (!pmu) {
157		parse_events_terms__exit(&terms);
158		return -ENOMEM;
159	}
160
161	INIT_LIST_HEAD(&pmu->format);
162	INIT_LIST_HEAD(&pmu->aliases);
163	INIT_LIST_HEAD(&pmu->caps);
164	format = test_format_dir_get(dir, sizeof(dir));
165	if (!format) {
166		free(pmu);
167		parse_events_terms__exit(&terms);
168		return -EINVAL;
169	}
170
171	memset(&attr, 0, sizeof(attr));
172
173	fd = open(format, O_DIRECTORY);
174	if (fd < 0) {
175		ret = fd;
176		goto out;
177	}
178
179	pmu->name = strdup("perf-pmu-test");
180	ret = perf_pmu__format_parse(pmu, fd, /*eager_load=*/true);
181	if (ret)
182		goto out;
183
184	ret = perf_pmu__config_terms(pmu, &attr, &terms, /*zero=*/false, /*err=*/NULL);
185	if (ret)
186		goto out;
187
188	ret = -EINVAL;
189	if (attr.config  != 0xc00000000002a823)
190		goto out;
191	if (attr.config1 != 0x8000400000000145)
192		goto out;
193	if (attr.config2 != 0x0400000020041d07)
194		goto out;
195
196	ret = 0;
197out:
198	test_format_dir_put(format);
199	perf_pmu__delete(pmu);
200	parse_events_terms__exit(&terms);
201	return ret;
202}
203
204DEFINE_SUITE("Parse perf pmu format", pmu);
205