2 * Jailhouse, a Linux-based partitioning hypervisor
4 * Copyright (c) Siemens AG, 2013
7 * Jan Kiszka <jan.kiszka@siemens.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
22 #include <sys/types.h>
23 #include <sys/ioctl.h>
26 #include <jailhouse.h>
28 #define JAILHOUSE_EXEC_DIR LIBEXECDIR "/jailhouse"
30 enum shutdown_load_mode {LOAD, SHUTDOWN};
33 char *cmd, *subcmd, *help;
36 static const struct extension extensions[] = {
37 { "cell", "linux", "CELLCONFIG KERNEL [-i | --initrd FILE]\n"
38 " [-c | --cmdline \"STRING\"] "
39 "[-w | --write-params FILE]" },
40 { "cell", "list", "" },
41 { "cell", "stats", "{ ID | [--name] NAME }" },
42 { "config", "create", "[-h] [-g] [-r ROOT] "
43 "[--mem-inmates MEM_INMATES] [--mem-hv MEM_HV] FILE" },
44 { "config", "collect", "FILE.TAR" },
48 static void __attribute__((noreturn)) help(char *prog, int exit_status)
50 const struct extension *ext;
52 printf("Usage: %s { COMMAND | --help || --version }\n"
53 "\nAvailable commands:\n"
56 " cell create CELLCONFIG\n"
57 " cell load { ID | [--name] NAME } IMAGE "
58 "[ -a | --address ADDRESS] ...\n"
59 " cell start { ID | [--name] NAME }\n"
60 " cell shutdown { ID | [--name] NAME }\n"
61 " cell destroy { ID | [--name] NAME }\n",
63 for (ext = extensions; ext->cmd; ext++)
64 printf(" %s %s %s\n", ext->cmd, ext->subcmd, ext->help);
69 static void call_extension_script(const char *cmd, int argc, char *argv[])
71 const struct extension *ext;
72 char new_path[PATH_MAX];
78 for (ext = extensions; ext->cmd; ext++) {
79 if (strcmp(ext->cmd, cmd) != 0 ||
80 strcmp(ext->subcmd, argv[2]) != 0)
83 snprintf(new_path, sizeof(new_path), "PATH=%s:%s:%s",
84 dirname(argv[0]), JAILHOUSE_EXEC_DIR,
85 getenv("PATH") ? : "");
88 snprintf(script, sizeof(script), "jailhouse-%s-%s",
90 execvp(script, &argv[2]);
101 fd = open("/dev/jailhouse", O_RDWR);
103 perror("opening /dev/jailhouse");
109 static void *read_file(const char *name, size_t *size)
115 fd = open(name, O_RDONLY);
117 fprintf(stderr, "opening %s: %s\n", name, strerror(errno));
121 if (fstat(fd, &stat) < 0) {
126 buffer = malloc(stat.st_size);
128 fprintf(stderr, "insufficient memory\n");
132 if (read(fd, buffer, stat.st_size) < stat.st_size) {
133 fprintf(stderr, "reading %s: %s\n", name, strerror(errno));
140 *size = stat.st_size;
145 static int enable(int argc, char *argv[])
153 config = read_file(argv[2], NULL);
157 err = ioctl(fd, JAILHOUSE_ENABLE, config);
159 perror("JAILHOUSE_ENABLE");
167 static int cell_create(int argc, char *argv[])
169 struct jailhouse_cell_create cell_create;
176 cell_create.config_address = (unsigned long)read_file(argv[3], &size);
177 cell_create.config_size = size;
181 err = ioctl(fd, JAILHOUSE_CELL_CREATE, &cell_create);
183 perror("JAILHOUSE_CELL_CREATE");
186 free((void *)(unsigned long)cell_create.config_address);
191 static int parse_cell_id(struct jailhouse_cell_id *cell_id, int argc,
194 bool use_name = false;
198 memset(cell_id, 0, sizeof(*cell_id));
203 if (strcmp(argv[0], "--name") == 0) {
210 cell_id->id = strtoll(argv[0], &endp, 0);
211 if (errno != 0 || *endp != 0 || cell_id->id < 0)
216 cell_id->id = JAILHOUSE_CELL_ID_UNUSED;
217 /* cell_id is initialized with zeros, so leaving out the last
218 * byte ensures that the string is always terminated. */
219 strncpy(cell_id->name, argv[arg_pos],
220 sizeof(cell_id->name) - 1);
226 static bool match_opt(const char *argv, const char *short_opt,
227 const char *long_opt)
229 return strcmp(argv, short_opt) == 0 ||
230 strcmp(argv, long_opt) == 0;
233 static int cell_shutdown_load(int argc, char *argv[],
234 enum shutdown_load_mode mode)
236 unsigned int images, id_args, arg_num, n;
237 struct jailhouse_preload_image *image;
238 struct jailhouse_cell_load *cell_load;
239 struct jailhouse_cell_id cell_id;
244 id_args = parse_cell_id(&cell_id, argc - 3, &argv[3]);
245 arg_num = 3 + id_args;
246 if (id_args == 0 || (mode == SHUTDOWN && arg_num != argc) ||
247 (mode == LOAD && arg_num == argc))
251 while (arg_num < argc) {
255 if (arg_num < argc &&
256 match_opt(argv[arg_num], "-a", "--address")) {
257 if (arg_num + 1 >= argc)
263 cell_load = malloc(sizeof(*cell_load) + sizeof(*image) * images);
265 fprintf(stderr, "insufficient memory\n");
268 cell_load->cell_id = cell_id;
269 cell_load->num_preload_images = images;
271 arg_num = 3 + id_args;
273 for (n = 0, image = cell_load->image; n < images; n++, image++) {
274 image->source_address =
275 (unsigned long)read_file(argv[arg_num++], &size);
277 image->target_address = 0;
279 if (arg_num < argc &&
280 match_opt(argv[arg_num], "-a", "--address")) {
282 image->target_address =
283 strtoll(argv[arg_num + 1], &endp, 0);
284 if (errno != 0 || *endp != 0)
292 err = ioctl(fd, JAILHOUSE_CELL_LOAD, cell_load);
294 perror("JAILHOUSE_CELL_LOAD");
297 for (n = 0, image = cell_load->image; n < images; n++, image++)
298 free((void *)(unsigned long)image->source_address);
304 static int cell_simple_cmd(int argc, char *argv[], unsigned int command)
306 struct jailhouse_cell_id cell_id;
307 int id_args, err, fd;
309 id_args = parse_cell_id(&cell_id, argc - 3, &argv[3]);
310 if (id_args == 0 || 3 + id_args != argc)
315 err = ioctl(fd, command, &cell_id);
317 perror(command == JAILHOUSE_CELL_START ?
318 "JAILHOUSE_CELL_START" :
319 command == JAILHOUSE_CELL_DESTROY ?
320 "JAILHOUSE_CELL_DESTROY" :
321 "<unknown command>");
328 static int cell_management(int argc, char *argv[])
335 if (strcmp(argv[2], "create") == 0) {
336 err = cell_create(argc, argv);
337 } else if (strcmp(argv[2], "load") == 0) {
338 err = cell_shutdown_load(argc, argv, LOAD);
339 } else if (strcmp(argv[2], "start") == 0) {
340 err = cell_simple_cmd(argc, argv, JAILHOUSE_CELL_START);
341 } else if (strcmp(argv[2], "shutdown") == 0) {
342 err = cell_shutdown_load(argc, argv, SHUTDOWN);
343 } else if (strcmp(argv[2], "destroy") == 0) {
344 err = cell_simple_cmd(argc, argv, JAILHOUSE_CELL_DESTROY);
346 call_extension_script("cell", argc, argv);
353 int main(int argc, char *argv[])
361 if (strcmp(argv[1], "enable") == 0) {
362 err = enable(argc, argv);
363 } else if (strcmp(argv[1], "disable") == 0) {
365 err = ioctl(fd, JAILHOUSE_DISABLE);
367 perror("JAILHOUSE_DISABLE");
369 } else if (strcmp(argv[1], "cell") == 0) {
370 err = cell_management(argc, argv);
371 } else if (strcmp(argv[1], "config") == 0) {
372 call_extension_script(argv[1], argc, argv);
374 } else if (strcmp(argv[1], "--version") == 0) {
375 printf("Jailhouse management tool %s\n", JAILHOUSE_VERSION);
377 } else if (strcmp(argv[1], "--help") == 0) {