2  * libkmod - interface to kernel module operations
4  * Copyright (C) 2011-2013  ProFUSION embedded systems
38 #include "libkmod-internal.h"
39 #include "libkmod-index.h"
96 	if (ctx->log_fn == NULL)  in kmod_log()
100 	ctx->log_fn(ctx->log_data, priority, file, line, fn, format, args);  in kmod_log()
159 	return ctx->dirname;  in kmod_get_dirname()
175 	return (void *)ctx->userdata;  in kmod_get_userdata()
189 	ctx->userdata = userdata;  in kmod_set_userdata()
231  *           defaults to /lib/modules/`uname -r`. If it's relative,
235  *                to load from user-defined configuration parameters such as
252 	const char *env;  in kmod_new()  local
260 	ctx->refcount = 1;  in kmod_new()
261 	ctx->log_fn = log_filep;  in kmod_new()
262 	ctx->log_data = stderr;  in kmod_new()
263 	ctx->log_priority = LOG_ERR;  in kmod_new()
265 	ctx->dirname = get_kernel_release(dirname);  in kmod_new()
268 	env = secure_getenv("KMOD_LOG");  in kmod_new()
269 	if (env != NULL)  in kmod_new()
270 		kmod_set_log_priority(ctx, log_priority(env));  in kmod_new()
274 	err = kmod_config_new(ctx, &ctx->config, config_paths);  in kmod_new()
277 		goto fail;  in kmod_new()
280 	ctx->modules_by_name = hash_new(KMOD_HASH_SIZE, NULL);  in kmod_new()
281 	if (ctx->modules_by_name == NULL) {  in kmod_new()
282 		ERR(ctx, "could not create by-name hash\n");  in kmod_new()
283 		goto fail;  in kmod_new()
287 	DBG(ctx, "log_priority=%d\n", ctx->log_priority);  in kmod_new()
291 fail:  in kmod_new()
292 	free(ctx->modules_by_name);  in kmod_new()
293 	free(ctx->dirname);  in kmod_new()
310 	ctx->refcount++;  in kmod_ref()
328 	if (--ctx->refcount > 0)  in kmod_unref()
334 	hash_free(ctx->modules_by_name);  in kmod_unref()
335 	free(ctx->dirname);  in kmod_unref()
336 	if (ctx->config)  in kmod_unref()
337 		kmod_config_free(ctx->config);  in kmod_unref()
349  * The built-in logging writes to stderr. It can be
362 	ctx->log_fn = log_fn;  in kmod_set_log_fn()
363 	ctx->log_data = (void *)data;  in kmod_set_log_fn()
376 		return -1;  in kmod_get_log_priority()
377 	return ctx->log_priority;  in kmod_get_log_priority()
392 	ctx->log_priority = priority;  in kmod_set_log_priority()
400 	mod = hash_find(ctx->modules_by_name, key);  in kmod_pool_get_module()
412 	hash_add(ctx->modules_by_name, key, mod);  in kmod_pool_add_module()
420 	hash_del(ctx->modules_by_name, key);  in kmod_pool_del_module()
432 	if (ctx->indexes[index_number] != NULL) {  in kmod_lookup_alias_from_alias_bin()
435 		realnames = index_mm_searchwild(ctx->indexes[index_number],  in kmod_lookup_alias_from_alias_bin()
440 		snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,  in kmod_lookup_alias_from_alias_bin()
447 			return -ENOSYS;  in kmod_lookup_alias_from_alias_bin()
453 	for (realname = realnames; realname; realname = realname->next) {  in kmod_lookup_alias_from_alias_bin()
456 		err = kmod_module_new_from_alias(ctx, name, realname->value, &mod);  in kmod_lookup_alias_from_alias_bin()
459 			    name, realname->value, strerror(-err));  in kmod_lookup_alias_from_alias_bin()
460 			goto fail;  in kmod_lookup_alias_from_alias_bin()
470 fail:  in kmod_lookup_alias_from_alias_bin()
498 	if (ctx->indexes[KMOD_INDEX_MODULES_BUILTIN]) {  in lookup_builtin_file()
502 		line = index_mm_search(ctx->indexes[KMOD_INDEX_MODULES_BUILTIN],  in lookup_builtin_file()
508 		snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,  in lookup_builtin_file()
540 							name, strerror(-err));  in kmod_lookup_alias_from_builtin_file()
549 			err = -ENOMEM;  in kmod_lookup_alias_from_builtin_file()
572 	if (ctx->indexes[KMOD_INDEX_MODULES_DEP]) {  in kmod_search_moddep()
575 		return index_mm_search(ctx->indexes[KMOD_INDEX_MODULES_DEP],  in kmod_search_moddep()
579 	snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,  in kmod_search_moddep()
616 			    name, strerror(-n));  in kmod_lookup_alias_from_moddep_file()
633 	struct kmod_config *config = ctx->config;  in kmod_lookup_alias_from_config()
637 	kmod_list_foreach(l, config->aliases) {  in kmod_lookup_alias_from_config()
648 				    name, modname, strerror(-err));  in kmod_lookup_alias_from_config()
649 				goto fail;  in kmod_lookup_alias_from_config()
659 fail:  in kmod_lookup_alias_from_config()
667 	struct kmod_config *config = ctx->config;  in kmod_lookup_alias_from_commands()
671 	kmod_list_foreach(l, config->install_commands) {  in kmod_lookup_alias_from_commands()
681 				    modname, strerror(-err));  in kmod_lookup_alias_from_commands()
688 				return -ENOMEM;  in kmod_lookup_alias_from_commands()
698 			 * module-init-tools does  in kmod_lookup_alias_from_commands()
707 	kmod_list_foreach(l, config->remove_commands) {  in kmod_lookup_alias_from_commands()
717 				    modname, strerror(-err));  in kmod_lookup_alias_from_commands()
724 				return -ENOMEM;  in kmod_lookup_alias_from_commands()
734 			 * module-init-tools does  in kmod_lookup_alias_from_commands()
748 	hash_iter_init(ctx->modules_by_name, &iter);  in kmod_set_modules_visited()
758 	hash_iter_init(ctx->modules_by_name, &iter);  in kmod_set_modules_required()
780  * Check if indexes and configuration files changed on disk and the current
786  * KMOD_RESOURCES_MUST_RECREATE if @ctx must be re-created.
793 	if (ctx == NULL || ctx->config == NULL)  in kmod_validate_resources()
796 	kmod_list_foreach(l, ctx->config->paths) {  in kmod_validate_resources()
797 		struct kmod_config_path *cf = l->data;  in kmod_validate_resources()
799 		if (is_cache_invalid(cf->path, cf->stamp))  in kmod_validate_resources()
806 		if (ctx->indexes[i] == NULL)  in kmod_validate_resources()
809 		snprintf(path, sizeof(path), "%s/%s.bin", ctx->dirname,  in kmod_validate_resources()
812 		if (is_cache_invalid(path, ctx->indexes_stamp[i]))  in kmod_validate_resources()
839 		return -ENOENT;  in kmod_load_resources()
844 		if (ctx->indexes[i] != NULL) {  in kmod_load_resources()
850 		snprintf(path, sizeof(path), "%s/%s.bin", ctx->dirname,  in kmod_load_resources()
852 		ctx->indexes[i] = index_mm_open(ctx, path,  in kmod_load_resources()
853 						&ctx->indexes_stamp[i]);  in kmod_load_resources()
854 		if (ctx->indexes[i] == NULL)  in kmod_load_resources()
855 			goto fail;  in kmod_load_resources()
860 fail:  in kmod_load_resources()
862 	return -ENOMEM;  in kmod_load_resources()
888 		if (ctx->indexes[i] != NULL) {  in kmod_unload_resources()
889 			index_mm_close(ctx->indexes[i]);  in kmod_unload_resources()
890 			ctx->indexes[i] = NULL;  in kmod_unload_resources()
891 			ctx->indexes_stamp[i] = 0;  in kmod_unload_resources()
916 		return -ENOSYS;  in kmod_dump_index()
919 		return -ENOENT;  in kmod_dump_index()
921 	if (ctx->indexes[type] != NULL) {  in kmod_dump_index()
923 		index_mm_dump(ctx->indexes[type], fd,  in kmod_dump_index()
929 		snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,  in kmod_dump_index()
936 			return -ENOSYS;  in kmod_dump_index()
947 	return ctx->config;  in kmod_get_config()