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-rw-r--r--tools/testing/selftests/alsa/conf.c469
1 files changed, 469 insertions, 0 deletions
diff --git a/tools/testing/selftests/alsa/conf.c b/tools/testing/selftests/alsa/conf.c
new file mode 100644
index 0000000000..ff09038fdc
--- /dev/null
+++ b/tools/testing/selftests/alsa/conf.c
@@ -0,0 +1,469 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// kselftest configuration helpers for the hw specific configuration
+//
+// Original author: Jaroslav Kysela <perex@perex.cz>
+// Copyright (c) 2022 Red Hat Inc.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <assert.h>
+#include <dirent.h>
+#include <regex.h>
+#include <sys/stat.h>
+
+#include "../kselftest.h"
+#include "alsa-local.h"
+
+#define SYSFS_ROOT "/sys"
+
+struct card_data {
+ int card;
+ snd_config_t *config;
+ const char *filename;
+ struct card_data *next;
+};
+
+static struct card_data *conf_cards;
+
+static const char *alsa_config =
+"ctl.hw {\n"
+" @args [ CARD ]\n"
+" @args.CARD.type string\n"
+" type hw\n"
+" card $CARD\n"
+"}\n"
+"pcm.hw {\n"
+" @args [ CARD DEV SUBDEV ]\n"
+" @args.CARD.type string\n"
+" @args.DEV.type integer\n"
+" @args.SUBDEV.type integer\n"
+" type hw\n"
+" card $CARD\n"
+" device $DEV\n"
+" subdevice $SUBDEV\n"
+"}\n"
+;
+
+#ifdef SND_LIB_VER
+#if SND_LIB_VERSION >= SND_LIB_VER(1, 2, 6)
+#define LIB_HAS_LOAD_STRING
+#endif
+#endif
+
+#ifndef LIB_HAS_LOAD_STRING
+static int snd_config_load_string(snd_config_t **config, const char *s,
+ size_t size)
+{
+ snd_input_t *input;
+ snd_config_t *dst;
+ int err;
+
+ assert(config && s);
+ if (size == 0)
+ size = strlen(s);
+ err = snd_input_buffer_open(&input, s, size);
+ if (err < 0)
+ return err;
+ err = snd_config_top(&dst);
+ if (err < 0) {
+ snd_input_close(input);
+ return err;
+ }
+ err = snd_config_load(dst, input);
+ snd_input_close(input);
+ if (err < 0) {
+ snd_config_delete(dst);
+ return err;
+ }
+ *config = dst;
+ return 0;
+}
+#endif
+
+snd_config_t *get_alsalib_config(void)
+{
+ snd_config_t *config;
+ int err;
+
+ err = snd_config_load_string(&config, alsa_config, strlen(alsa_config));
+ if (err < 0) {
+ ksft_print_msg("Unable to parse custom alsa-lib configuration: %s\n",
+ snd_strerror(err));
+ ksft_exit_fail();
+ }
+ return config;
+}
+
+static struct card_data *conf_data_by_card(int card, bool msg)
+{
+ struct card_data *conf;
+
+ for (conf = conf_cards; conf; conf = conf->next) {
+ if (conf->card == card) {
+ if (msg)
+ ksft_print_msg("using hw card config %s for card %d\n",
+ conf->filename, card);
+ return conf;
+ }
+ }
+ return NULL;
+}
+
+static int dump_config_tree(snd_config_t *top)
+{
+ snd_output_t *out;
+ int err;
+
+ err = snd_output_stdio_attach(&out, stdout, 0);
+ if (err < 0)
+ ksft_exit_fail_msg("stdout attach\n");
+ if (snd_config_save(top, out))
+ ksft_exit_fail_msg("config save\n");
+ snd_output_close(out);
+}
+
+snd_config_t *conf_load_from_file(const char *filename)
+{
+ snd_config_t *dst;
+ snd_input_t *input;
+ int err;
+
+ err = snd_input_stdio_open(&input, filename, "r");
+ if (err < 0)
+ ksft_exit_fail_msg("Unable to parse filename %s\n", filename);
+ err = snd_config_top(&dst);
+ if (err < 0)
+ ksft_exit_fail_msg("Out of memory\n");
+ err = snd_config_load(dst, input);
+ snd_input_close(input);
+ if (err < 0)
+ ksft_exit_fail_msg("Unable to parse filename %s\n", filename);
+ return dst;
+}
+
+static char *sysfs_get(const char *sysfs_root, const char *id)
+{
+ char path[PATH_MAX], link[PATH_MAX + 1];
+ struct stat sb;
+ ssize_t len;
+ char *e;
+ int fd;
+
+ if (id[0] == '/')
+ id++;
+ snprintf(path, sizeof(path), "%s/%s", sysfs_root, id);
+ if (lstat(path, &sb) != 0)
+ return NULL;
+ if (S_ISLNK(sb.st_mode)) {
+ len = readlink(path, link, sizeof(link) - 1);
+ if (len <= 0) {
+ ksft_exit_fail_msg("sysfs: cannot read link '%s': %s\n",
+ path, strerror(errno));
+ return NULL;
+ }
+ link[len] = '\0';
+ e = strrchr(link, '/');
+ if (e)
+ return strdup(e + 1);
+ return NULL;
+ }
+ if (S_ISDIR(sb.st_mode))
+ return NULL;
+ if ((sb.st_mode & S_IRUSR) == 0)
+ return NULL;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ if (errno == ENOENT)
+ return NULL;
+ ksft_exit_fail_msg("sysfs: open failed for '%s': %s\n",
+ path, strerror(errno));
+ }
+ len = read(fd, path, sizeof(path)-1);
+ close(fd);
+ if (len < 0)
+ ksft_exit_fail_msg("sysfs: unable to read value '%s': %s\n",
+ path, strerror(errno));
+ while (len > 0 && path[len-1] == '\n')
+ len--;
+ path[len] = '\0';
+ e = strdup(path);
+ if (e == NULL)
+ ksft_exit_fail_msg("Out of memory\n");
+ return e;
+}
+
+static bool sysfs_match(const char *sysfs_root, snd_config_t *config)
+{
+ snd_config_t *node, *path_config, *regex_config;
+ snd_config_iterator_t i, next;
+ const char *path_string, *regex_string, *v;
+ regex_t re;
+ regmatch_t match[1];
+ int iter = 0, ret;
+
+ snd_config_for_each(i, next, config) {
+ node = snd_config_iterator_entry(i);
+ if (snd_config_search(node, "path", &path_config))
+ ksft_exit_fail_msg("Missing path field in the sysfs block\n");
+ if (snd_config_search(node, "regex", &regex_config))
+ ksft_exit_fail_msg("Missing regex field in the sysfs block\n");
+ if (snd_config_get_string(path_config, &path_string))
+ ksft_exit_fail_msg("Path field in the sysfs block is not a string\n");
+ if (snd_config_get_string(regex_config, &regex_string))
+ ksft_exit_fail_msg("Regex field in the sysfs block is not a string\n");
+ iter++;
+ v = sysfs_get(sysfs_root, path_string);
+ if (!v)
+ return false;
+ if (regcomp(&re, regex_string, REG_EXTENDED))
+ ksft_exit_fail_msg("Wrong regex '%s'\n", regex_string);
+ ret = regexec(&re, v, 1, match, 0);
+ regfree(&re);
+ if (ret)
+ return false;
+ }
+ return iter > 0;
+}
+
+static bool test_filename1(int card, const char *filename, const char *sysfs_card_root)
+{
+ struct card_data *data, *data2;
+ snd_config_t *config, *sysfs_config, *card_config, *sysfs_card_config, *node;
+ snd_config_iterator_t i, next;
+
+ config = conf_load_from_file(filename);
+ if (snd_config_search(config, "sysfs", &sysfs_config) ||
+ snd_config_get_type(sysfs_config) != SND_CONFIG_TYPE_COMPOUND)
+ ksft_exit_fail_msg("Missing global sysfs block in filename %s\n", filename);
+ if (snd_config_search(config, "card", &card_config) ||
+ snd_config_get_type(card_config) != SND_CONFIG_TYPE_COMPOUND)
+ ksft_exit_fail_msg("Missing global card block in filename %s\n", filename);
+ if (!sysfs_match(SYSFS_ROOT, sysfs_config))
+ return false;
+ snd_config_for_each(i, next, card_config) {
+ node = snd_config_iterator_entry(i);
+ if (snd_config_search(node, "sysfs", &sysfs_card_config) ||
+ snd_config_get_type(sysfs_card_config) != SND_CONFIG_TYPE_COMPOUND)
+ ksft_exit_fail_msg("Missing card sysfs block in filename %s\n", filename);
+ if (!sysfs_match(sysfs_card_root, sysfs_card_config))
+ continue;
+ data = malloc(sizeof(*data));
+ if (!data)
+ ksft_exit_fail_msg("Out of memory\n");
+ data2 = conf_data_by_card(card, false);
+ if (data2)
+ ksft_exit_fail_msg("Duplicate card '%s' <-> '%s'\n", filename, data2->filename);
+ data->card = card;
+ data->filename = filename;
+ data->config = node;
+ data->next = conf_cards;
+ conf_cards = data;
+ return true;
+ }
+ return false;
+}
+
+static bool test_filename(const char *filename)
+{
+ char fn[128];
+ int card;
+
+ for (card = 0; card < 32; card++) {
+ snprintf(fn, sizeof(fn), "%s/class/sound/card%d", SYSFS_ROOT, card);
+ if (access(fn, R_OK) == 0 && test_filename1(card, filename, fn))
+ return true;
+ }
+ return false;
+}
+
+static int filename_filter(const struct dirent *dirent)
+{
+ size_t flen;
+
+ if (dirent == NULL)
+ return 0;
+ if (dirent->d_type == DT_DIR)
+ return 0;
+ flen = strlen(dirent->d_name);
+ if (flen <= 5)
+ return 0;
+ if (strncmp(&dirent->d_name[flen-5], ".conf", 5) == 0)
+ return 1;
+ return 0;
+}
+
+void conf_load(void)
+{
+ const char *fn = "conf.d";
+ struct dirent **namelist;
+ int n, j;
+
+ n = scandir(fn, &namelist, filename_filter, alphasort);
+ if (n < 0)
+ ksft_exit_fail_msg("scandir: %s\n", strerror(errno));
+ for (j = 0; j < n; j++) {
+ size_t sl = strlen(fn) + strlen(namelist[j]->d_name) + 2;
+ char *filename = malloc(sl);
+ if (filename == NULL)
+ ksft_exit_fail_msg("Out of memory\n");
+ sprintf(filename, "%s/%s", fn, namelist[j]->d_name);
+ if (test_filename(filename))
+ filename = NULL;
+ free(filename);
+ free(namelist[j]);
+ }
+ free(namelist);
+}
+
+void conf_free(void)
+{
+ struct card_data *conf;
+
+ while (conf_cards) {
+ conf = conf_cards;
+ conf_cards = conf->next;
+ snd_config_delete(conf->config);
+ }
+}
+
+snd_config_t *conf_by_card(int card)
+{
+ struct card_data *conf;
+
+ conf = conf_data_by_card(card, true);
+ if (conf)
+ return conf->config;
+ return NULL;
+}
+
+static int conf_get_by_keys(snd_config_t *root, const char *key1,
+ const char *key2, snd_config_t **result)
+{
+ int ret;
+
+ if (key1) {
+ ret = snd_config_search(root, key1, &root);
+ if (ret != -ENOENT && ret < 0)
+ return ret;
+ }
+ if (key2)
+ ret = snd_config_search(root, key2, &root);
+ if (ret >= 0)
+ *result = root;
+ return ret;
+}
+
+snd_config_t *conf_get_subtree(snd_config_t *root, const char *key1, const char *key2)
+{
+ int ret;
+
+ if (!root)
+ return NULL;
+ ret = conf_get_by_keys(root, key1, key2, &root);
+ if (ret == -ENOENT)
+ return NULL;
+ if (ret < 0)
+ ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+ return root;
+}
+
+int conf_get_count(snd_config_t *root, const char *key1, const char *key2)
+{
+ snd_config_t *cfg;
+ snd_config_iterator_t i, next;
+ int count, ret;
+
+ if (!root)
+ return -1;
+ ret = conf_get_by_keys(root, key1, key2, &cfg);
+ if (ret == -ENOENT)
+ return -1;
+ if (ret < 0)
+ ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+ if (snd_config_get_type(cfg) != SND_CONFIG_TYPE_COMPOUND)
+ ksft_exit_fail_msg("key '%s'.'%s' is not a compound\n", key1, key2);
+ count = 0;
+ snd_config_for_each(i, next, cfg)
+ count++;
+ return count;
+}
+
+const char *conf_get_string(snd_config_t *root, const char *key1, const char *key2, const char *def)
+{
+ snd_config_t *cfg;
+ const char *s;
+ int ret;
+
+ if (!root)
+ return def;
+ ret = conf_get_by_keys(root, key1, key2, &cfg);
+ if (ret == -ENOENT)
+ return def;
+ if (ret < 0)
+ ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+ if (snd_config_get_string(cfg, &s))
+ ksft_exit_fail_msg("key '%s'.'%s' is not a string\n", key1, key2);
+ return s;
+}
+
+long conf_get_long(snd_config_t *root, const char *key1, const char *key2, long def)
+{
+ snd_config_t *cfg;
+ long l;
+ int ret;
+
+ if (!root)
+ return def;
+ ret = conf_get_by_keys(root, key1, key2, &cfg);
+ if (ret == -ENOENT)
+ return def;
+ if (ret < 0)
+ ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+ if (snd_config_get_integer(cfg, &l))
+ ksft_exit_fail_msg("key '%s'.'%s' is not an integer\n", key1, key2);
+ return l;
+}
+
+int conf_get_bool(snd_config_t *root, const char *key1, const char *key2, int def)
+{
+ snd_config_t *cfg;
+ int ret;
+
+ if (!root)
+ return def;
+ ret = conf_get_by_keys(root, key1, key2, &cfg);
+ if (ret == -ENOENT)
+ return def;
+ if (ret < 0)
+ ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+ ret = snd_config_get_bool(cfg);
+ if (ret < 0)
+ ksft_exit_fail_msg("key '%s'.'%s' is not an bool\n", key1, key2);
+ return !!ret;
+}
+
+void conf_get_string_array(snd_config_t *root, const char *key1, const char *key2,
+ const char **array, int array_size, const char *def)
+{
+ snd_config_t *cfg;
+ char buf[16];
+ int ret, index;
+
+ ret = conf_get_by_keys(root, key1, key2, &cfg);
+ if (ret == -ENOENT)
+ cfg = NULL;
+ else if (ret < 0)
+ ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+ for (index = 0; index < array_size; index++) {
+ if (cfg == NULL) {
+ array[index] = def;
+ } else {
+ sprintf(buf, "%i", index);
+ array[index] = conf_get_string(cfg, buf, NULL, def);
+ }
+ }
+}