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Diffstat (limited to '')
| -rw-r--r-- | tools/testing/selftests/alsa/conf.c | 475 |
1 files changed, 475 insertions, 0 deletions
diff --git a/tools/testing/selftests/alsa/conf.c b/tools/testing/selftests/alsa/conf.c new file mode 100644 index 000000000000..89e3656a042d --- /dev/null +++ b/tools/testing/selftests/alsa/conf.c @@ -0,0 +1,475 @@ +// 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_cfg_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_cfg_data *conf_data_by_card(int card, bool msg) +{ + struct card_cfg_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", ®ex_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, ®ex_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 void assign_card_config(int card, const char *sysfs_card_root) +{ + struct card_cfg_data *data; + snd_config_t *sysfs_card_config; + + for (data = conf_cards; data; data = data->next) { + snd_config_search(data->config, "sysfs", &sysfs_card_config); + if (!sysfs_match(sysfs_card_root, sysfs_card_config)) + continue; + + data->card = card; + break; + } +} + +static void assign_card_configs(void) +{ + 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) + assign_card_config(card, fn); + } +} + +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; +} + +static bool match_config(const char *filename) +{ + struct card_cfg_data *data; + 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); + + data = malloc(sizeof(*data)); + if (!data) + ksft_exit_fail_msg("Out of memory\n"); + data->filename = filename; + data->config = node; + data->card = -1; + if (snd_config_get_id(node, &data->config_id)) + ksft_exit_fail_msg("snd_config_get_id failed for card\n"); + data->next = conf_cards; + conf_cards = data; + } + return true; +} + +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 (match_config(filename)) + filename = NULL; + free(filename); + free(namelist[j]); + } + free(namelist); + + assign_card_configs(); +} + +void conf_free(void) +{ + struct card_cfg_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_cfg_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); + } + } +} |