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"
57 	[KMOD_INDEX_MODULES_DEP] = { .fn = "modules.dep", .prefix = "" },
58 	[KMOD_INDEX_MODULES_ALIAS] = { .fn = "modules.alias", .prefix = "alias " },
59 	[KMOD_INDEX_MODULES_SYMBOL] = { .fn = "modules.symbols", .prefix = "alias "},
60 	[KMOD_INDEX_MODULES_BUILTIN_ALIAS] = { .fn = "modules.builtin.alias", .prefix = "" },
61 	[KMOD_INDEX_MODULES_BUILTIN] = { .fn = "modules.builtin", .prefix = ""},
98 	if (ctx->log_fn == NULL)  in kmod_log()
102 	ctx->log_fn(ctx->log_data, priority, file, line, fn, format, args);  in kmod_log()
156  * Retrieve the absolute path used for linux modules in this context. The path
161 	return ctx->dirname;  in kmod_get_dirname()
177 	return (void *)ctx->userdata;  in kmod_get_userdata()
191 	ctx->userdata = userdata;  in kmod_set_userdata()
211 static const char *dirname_default_prefix = "/lib/modules";
233  *           defaults to /lib/modules/`uname -r`. If it's relative,
237  *                to load from user-defined configuration parameters such as
263 	ctx->refcount = 1;  in kmod_new()
264 	ctx->log_fn = log_filep;  in kmod_new()
265 	ctx->log_data = stderr;  in kmod_new()
266 	ctx->log_priority = LOG_ERR;  in kmod_new()
268 	ctx->dirname = get_kernel_release(dirname);  in kmod_new()
277 	err = kmod_config_new(ctx, &ctx->config, config_paths);  in kmod_new()
283 	ctx->modules_by_name = hash_new(KMOD_HASH_SIZE, NULL);  in kmod_new()
284 	if (ctx->modules_by_name == NULL) {  in kmod_new()
285 		ERR(ctx, "could not create by-name hash\n");  in kmod_new()
290 	DBG(ctx, "log_priority=%d\n", ctx->log_priority);  in kmod_new()
295 	free(ctx->modules_by_name);  in kmod_new()
296 	free(ctx->dirname);  in kmod_new()
313 	ctx->refcount++;  in kmod_ref()
331 	if (--ctx->refcount > 0)  in kmod_unref()
337 	hash_free(ctx->modules_by_name);  in kmod_unref()
338 	free(ctx->dirname);  in kmod_unref()
339 	if (ctx->config)  in kmod_unref()
340 		kmod_config_free(ctx->config);  in kmod_unref()
352  * The built-in logging writes to stderr. It can be
365 	ctx->log_fn = log_fn;  in kmod_set_log_fn()
366 	ctx->log_data = (void *)data;  in kmod_set_log_fn()
379 		return -1;  in kmod_get_log_priority()
380 	return ctx->log_priority;  in kmod_get_log_priority()
395 	ctx->log_priority = priority;  in kmod_set_log_priority()
403 	mod = hash_find(ctx->modules_by_name, key);  in kmod_pool_get_module()
415 	hash_add(ctx->modules_by_name, key, mod);  in kmod_pool_add_module()
423 	hash_del(ctx->modules_by_name, key);  in kmod_pool_del_module()
435 	if (ctx->indexes[index_number] != NULL) {  in kmod_lookup_alias_from_alias_bin()
438 		realnames = index_mm_searchwild(ctx->indexes[index_number],  in kmod_lookup_alias_from_alias_bin()
443 		snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,  in kmod_lookup_alias_from_alias_bin()
450 			return -ENOSYS;  in kmod_lookup_alias_from_alias_bin()
456 	for (realname = realnames; realname; realname = realname->next) {  in kmod_lookup_alias_from_alias_bin()
459 		err = kmod_module_new_from_alias(ctx, name, realname->value, &mod);  in kmod_lookup_alias_from_alias_bin()
462 			    name, realname->value, strerror(-err));  in kmod_lookup_alias_from_alias_bin()
501 	if (ctx->indexes[KMOD_INDEX_MODULES_BUILTIN]) {  in lookup_builtin_file()
505 		line = index_mm_search(ctx->indexes[KMOD_INDEX_MODULES_BUILTIN],  in lookup_builtin_file()
511 		snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,  in lookup_builtin_file()
517 			DBG(ctx, "could not open builtin file '%s'\n", fn);  in lookup_builtin_file()
542 		struct kmod_module *mod = l->data;  in kmod_lookup_alias_from_kernel_builtin_file()
564 							name, strerror(-err));  in kmod_lookup_alias_from_builtin_file()
568 		/* already mark it as builtin since it's being created from  in kmod_lookup_alias_from_builtin_file()
573 			err = -ENOMEM;  in kmod_lookup_alias_from_builtin_file()
596 	if (ctx->indexes[KMOD_INDEX_MODULES_DEP]) {  in kmod_search_moddep()
599 		return index_mm_search(ctx->indexes[KMOD_INDEX_MODULES_DEP],  in kmod_search_moddep()
603 	snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,  in kmod_search_moddep()
640 			    name, strerror(-n));  in kmod_lookup_alias_from_moddep_file()
657 	struct kmod_config *config = ctx->config;  in kmod_lookup_alias_from_config()
661 	kmod_list_foreach(l, config->aliases) {  in kmod_lookup_alias_from_config()
672 				    name, modname, strerror(-err));  in kmod_lookup_alias_from_config()
691 	struct kmod_config *config = ctx->config;  in kmod_lookup_alias_from_commands()
695 	kmod_list_foreach(l, config->install_commands) {  in kmod_lookup_alias_from_commands()
705 				    modname, strerror(-err));  in kmod_lookup_alias_from_commands()
712 				return -ENOMEM;  in kmod_lookup_alias_from_commands()
722 			 * module-init-tools does  in kmod_lookup_alias_from_commands()
731 	kmod_list_foreach(l, config->remove_commands) {  in kmod_lookup_alias_from_commands()
741 				    modname, strerror(-err));  in kmod_lookup_alias_from_commands()
748 				return -ENOMEM;  in kmod_lookup_alias_from_commands()
758 			 * module-init-tools does  in kmod_lookup_alias_from_commands()
772 	hash_iter_init(ctx->modules_by_name, &iter);  in kmod_set_modules_visited()
782 	hash_iter_init(ctx->modules_by_name, &iter);  in kmod_set_modules_required()
810  * KMOD_RESOURCES_MUST_RECREATE if @ctx must be re-created.
817 	if (ctx == NULL || ctx->config == NULL)  in kmod_validate_resources()
820 	kmod_list_foreach(l, ctx->config->paths) {  in kmod_validate_resources()
821 		struct kmod_config_path *cf = l->data;  in kmod_validate_resources()
823 		if (is_cache_invalid(cf->path, cf->stamp))  in kmod_validate_resources()
830 		if (ctx->indexes[i] == NULL)  in kmod_validate_resources()
833 		snprintf(path, sizeof(path), "%s/%s.bin", ctx->dirname,  in kmod_validate_resources()
836 		if (is_cache_invalid(path, ctx->indexes_stamp[i]))  in kmod_validate_resources()
864 		return -ENOENT;  in kmod_load_resources()
869 		if (ctx->indexes[i] != NULL) {  in kmod_load_resources()
875 		snprintf(path, sizeof(path), "%s/%s.bin", ctx->dirname,  in kmod_load_resources()
877 		ret = index_mm_open(ctx, path, &ctx->indexes_stamp[i],  in kmod_load_resources()
878 				    &ctx->indexes[i]);  in kmod_load_resources()
881 		 * modules.builtin.alias are considered optional since it's  in kmod_load_resources()
907  * knows that when starting up it will lookup a lot of modules, it could call
921 		if (ctx->indexes[i] != NULL) {  in kmod_unload_resources()
922 			index_mm_close(ctx->indexes[i]);  in kmod_unload_resources()
923 			ctx->indexes[i] = NULL;  in kmod_unload_resources()
924 			ctx->indexes_stamp[i] = 0;  in kmod_unload_resources()
936  * KMOD_INDEX_MODULES_BUILTIN: index of builtin module.
949 		return -ENOSYS;  in kmod_dump_index()
952 		return -ENOENT;  in kmod_dump_index()
954 	if (ctx->indexes[type] != NULL) {  in kmod_dump_index()
956 		index_mm_dump(ctx->indexes[type], fd,  in kmod_dump_index()
962 		snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname,  in kmod_dump_index()
969 			return -ENOSYS;  in kmod_dump_index()
980 	return ctx->config;  in kmod_get_config()