void parse_boot_command_line()

in boot/ipl_parm.c [244:297]

• 46 lines of code
• 22 McCabe index (conditional complexity)

void parse_boot_command_line(void)
{
	char *param, *val;
	bool enabled;
	char *args;
	int rc;

	kaslr_enabled = IS_ENABLED(CONFIG_RANDOMIZE_BASE);
	args = strcpy(command_line_buf, early_command_line);
	while (*args) {
		args = next_arg(args, &param, &val);

		if (!strcmp(param, "mem") && val)
			memory_limit = round_down(memparse(val, NULL), PAGE_SIZE);

		if (!strcmp(param, "vmalloc") && val) {
			vmalloc_size = round_up(memparse(val, NULL), PAGE_SIZE);
			vmalloc_size_set = 1;
		}

		if (!strcmp(param, "dfltcc") && val) {
			if (!strcmp(val, "off"))
				zlib_dfltcc_support = ZLIB_DFLTCC_DISABLED;
			else if (!strcmp(val, "on"))
				zlib_dfltcc_support = ZLIB_DFLTCC_FULL;
			else if (!strcmp(val, "def_only"))
				zlib_dfltcc_support = ZLIB_DFLTCC_DEFLATE_ONLY;
			else if (!strcmp(val, "inf_only"))
				zlib_dfltcc_support = ZLIB_DFLTCC_INFLATE_ONLY;
			else if (!strcmp(val, "always"))
				zlib_dfltcc_support = ZLIB_DFLTCC_FULL_DEBUG;
		}

		if (!strcmp(param, "noexec")) {
			rc = kstrtobool(val, &enabled);
			if (!rc && !enabled)
				noexec_disabled = 1;
		}

		if (!strcmp(param, "facilities") && val)
			modify_fac_list(val);

		if (!strcmp(param, "nokaslr"))
			kaslr_enabled = 0;

#if IS_ENABLED(CONFIG_KVM)
		if (!strcmp(param, "prot_virt")) {
			rc = kstrtobool(val, &enabled);
			if (!rc && enabled)
				prot_virt_host = 1;
		}
#endif
	}
}