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Commit | Line | Data |
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a54d5262 DW |
1 | /* |
2 | * mdmon - monitor external metadata arrays | |
3 | * | |
e736b623 N |
4 | * Copyright (C) 2007-2009 Neil Brown <neilb@suse.de> |
5 | * Copyright (C) 2007-2009 Intel Corporation | |
a54d5262 DW |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms and conditions of the GNU General Public License, | |
9 | * version 2, as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along with | |
17 | * this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | */ | |
549e9569 NB |
20 | |
21 | /* | |
22 | * md array manager. | |
23 | * When md arrays have user-space managed metadata, this is the program | |
24 | * that does the managing. | |
25 | * | |
26 | * Given one argument: the name of the array (e.g. /dev/md0) that is | |
27 | * the container. | |
28 | * We fork off a helper that runs high priority and mlocked. It responds to | |
29 | * device failures and other events that might stop writeout, or that are | |
30 | * trivial to deal with. | |
31 | * The main thread then watches for new arrays being created in the container | |
32 | * and starts monitoring them too ... along with a few other tasks. | |
33 | * | |
34 | * The main thread communicates with the priority thread by writing over | |
35 | * a pipe. | |
36 | * Separate programs can communicate with the main thread via Unix-domain | |
37 | * socket. | |
38 | * The two threads share address space and open file table. | |
39 | * | |
40 | */ | |
41 | ||
42 | #ifndef _GNU_SOURCE | |
43 | #define _GNU_SOURCE | |
44 | #endif | |
45 | ||
46 | #include <unistd.h> | |
47 | #include <stdlib.h> | |
4d43913c | 48 | #include <sys/types.h> |
549e9569 NB |
49 | #include <sys/stat.h> |
50 | #include <sys/socket.h> | |
51 | #include <sys/un.h> | |
52 | #include <sys/mman.h> | |
4d43913c | 53 | #include <sys/syscall.h> |
9fe32043 | 54 | #include <sys/wait.h> |
549e9569 NB |
55 | #include <stdio.h> |
56 | #include <errno.h> | |
57 | #include <string.h> | |
58 | #include <fcntl.h> | |
b109d928 | 59 | #include <signal.h> |
13047e4c | 60 | #include <dirent.h> |
f4190c2f DW |
61 | #ifdef USE_PTHREADS |
62 | #include <pthread.h> | |
63 | #else | |
549e9569 | 64 | #include <sched.h> |
f4190c2f | 65 | #endif |
549e9569 NB |
66 | |
67 | #include "mdadm.h" | |
68 | #include "mdmon.h" | |
69 | ||
d56dd607 PB |
70 | char const Name[] = "mdmon"; |
71 | ||
549e9569 NB |
72 | struct active_array *discard_this; |
73 | struct active_array *pending_discard; | |
4d43913c NB |
74 | |
75 | int mon_tid, mgr_tid; | |
549e9569 | 76 | |
6144ed44 DW |
77 | int sigterm; |
78 | ||
f4190c2f DW |
79 | #ifdef USE_PTHREADS |
80 | static void *run_child(void *v) | |
81 | { | |
82 | struct supertype *c = v; | |
83 | ||
84 | mon_tid = syscall(SYS_gettid); | |
85 | do_monitor(c); | |
86 | return 0; | |
87 | } | |
88 | ||
89 | static int clone_monitor(struct supertype *container) | |
90 | { | |
91 | pthread_attr_t attr; | |
92 | pthread_t thread; | |
93 | int rc; | |
94 | ||
95 | mon_tid = -1; | |
96 | pthread_attr_init(&attr); | |
97 | pthread_attr_setstacksize(&attr, 4096); | |
98 | pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); | |
99 | rc = pthread_create(&thread, &attr, run_child, container); | |
100 | if (rc) | |
101 | return rc; | |
102 | while (mon_tid == -1) | |
103 | usleep(10); | |
104 | pthread_attr_destroy(&attr); | |
105 | ||
106 | mgr_tid = syscall(SYS_gettid); | |
107 | ||
108 | return mon_tid; | |
109 | } | |
110 | #else /* USE_PTHREADS */ | |
111 | static int run_child(void *v) | |
549e9569 NB |
112 | { |
113 | struct supertype *c = v; | |
1ed3f387 | 114 | |
549e9569 NB |
115 | do_monitor(c); |
116 | return 0; | |
117 | } | |
118 | ||
97f734fd N |
119 | #ifdef __ia64__ |
120 | int __clone2(int (*fn)(void *), | |
121 | void *child_stack_base, size_t stack_size, | |
122 | int flags, void *arg, ... | |
123 | /* pid_t *pid, struct user_desc *tls, pid_t *ctid */ ); | |
124 | #endif | |
f4190c2f | 125 | static int clone_monitor(struct supertype *container) |
549e9569 | 126 | { |
549e9569 | 127 | static char stack[4096]; |
549e9569 | 128 | |
97f734fd N |
129 | #ifdef __ia64__ |
130 | mon_tid = __clone2(run_child, stack, sizeof(stack), | |
131 | CLONE_FS|CLONE_FILES|CLONE_VM|CLONE_SIGHAND|CLONE_THREAD, | |
132 | container); | |
133 | #else | |
2cc98f9e | 134 | mon_tid = clone(run_child, stack+4096-64, |
549e9569 NB |
135 | CLONE_FS|CLONE_FILES|CLONE_VM|CLONE_SIGHAND|CLONE_THREAD, |
136 | container); | |
97f734fd | 137 | #endif |
3e70c845 | 138 | |
4d43913c | 139 | mgr_tid = syscall(SYS_gettid); |
2cc98f9e DW |
140 | |
141 | return mon_tid; | |
549e9569 | 142 | } |
f4190c2f | 143 | #endif /* USE_PTHREADS */ |
549e9569 | 144 | |
fa716c83 | 145 | static int make_pidfile(char *devname) |
549e9569 NB |
146 | { |
147 | char path[100]; | |
148 | char pid[10]; | |
149 | int fd; | |
3d2c4fc7 DW |
150 | int n; |
151 | ||
753cf905 | 152 | if (mkdir(MDMON_DIR, 0755) < 0 && |
ed8fa52f LB |
153 | errno != EEXIST) |
154 | return -errno; | |
753cf905 | 155 | sprintf(path, "%s/%s.pid", MDMON_DIR, devname); |
549e9569 | 156 | |
5d4d1b26 | 157 | fd = open(path, O_RDWR|O_CREAT|O_EXCL, 0600); |
549e9569 | 158 | if (fd < 0) |
295646b3 | 159 | return -errno; |
549e9569 | 160 | sprintf(pid, "%d\n", getpid()); |
3d2c4fc7 | 161 | n = write(fd, pid, strlen(pid)); |
549e9569 | 162 | close(fd); |
3d2c4fc7 DW |
163 | if (n < 0) |
164 | return -errno; | |
549e9569 NB |
165 | return 0; |
166 | } | |
167 | ||
9f1da824 | 168 | static void try_kill_monitor(pid_t pid, char *devname, int sock) |
96a8270d DW |
169 | { |
170 | char buf[100]; | |
171 | int fd; | |
417a4b04 | 172 | int n; |
af7ca334 | 173 | long fl; |
b109d928 | 174 | |
8aae4219 DW |
175 | /* first rule of survival... don't off yourself */ |
176 | if (pid == getpid()) | |
177 | return; | |
178 | ||
b109d928 DW |
179 | /* kill this process if it is mdmon */ |
180 | sprintf(buf, "/proc/%lu/cmdline", (unsigned long) pid); | |
181 | fd = open(buf, O_RDONLY); | |
182 | if (fd < 0) | |
183 | return; | |
184 | ||
417a4b04 N |
185 | n = read(fd, buf, sizeof(buf)-1); |
186 | buf[sizeof(buf)-1] = 0; | |
187 | close(fd); | |
b109d928 | 188 | |
a99d3469 N |
189 | if (n < 0 || !(strstr(buf, "mdmon") || |
190 | strstr(buf, "@dmon"))) | |
883a6142 DW |
191 | return; |
192 | ||
193 | kill(pid, SIGTERM); | |
194 | ||
88e5516e N |
195 | if (sock < 0) |
196 | return; | |
197 | ||
af7ca334 N |
198 | /* Wait for monitor to exit by reading from the socket, after |
199 | * clearing the non-blocking flag */ | |
200 | fl = fcntl(sock, F_GETFL, 0); | |
201 | fl &= ~O_NONBLOCK; | |
202 | fcntl(sock, F_SETFL, fl); | |
fcf57625 N |
203 | n = read(sock, buf, 100); |
204 | /* Ignore result, it is just the wait that | |
1011e834 | 205 | * matters |
fcf57625 | 206 | */ |
b109d928 DW |
207 | } |
208 | ||
e0d6609f NB |
209 | void remove_pidfile(char *devname) |
210 | { | |
211 | char buf[100]; | |
212 | ||
753cf905 | 213 | sprintf(buf, "%s/%s.pid", MDMON_DIR, devname); |
e0d6609f | 214 | unlink(buf); |
753cf905 | 215 | sprintf(buf, "%s/%s.sock", MDMON_DIR, devname); |
57752795 | 216 | unlink(buf); |
e0d6609f NB |
217 | } |
218 | ||
fa716c83 | 219 | static int make_control_sock(char *devname) |
549e9569 NB |
220 | { |
221 | char path[100]; | |
222 | int sfd; | |
223 | long fl; | |
224 | struct sockaddr_un addr; | |
225 | ||
6144ed44 DW |
226 | if (sigterm) |
227 | return -1; | |
228 | ||
753cf905 | 229 | sprintf(path, "%s/%s.sock", MDMON_DIR, devname); |
549e9569 NB |
230 | unlink(path); |
231 | sfd = socket(PF_LOCAL, SOCK_STREAM, 0); | |
232 | if (sfd < 0) | |
233 | return -1; | |
234 | ||
235 | addr.sun_family = PF_LOCAL; | |
236 | strcpy(addr.sun_path, path); | |
120ec6f7 | 237 | umask(077); /* ensure no world write access */ |
50d72ed4 | 238 | if (bind(sfd, (struct sockaddr*)&addr, sizeof(addr)) < 0) { |
549e9569 NB |
239 | close(sfd); |
240 | return -1; | |
241 | } | |
242 | listen(sfd, 10); | |
243 | fl = fcntl(sfd, F_GETFL, 0); | |
244 | fl |= O_NONBLOCK; | |
245 | fcntl(sfd, F_SETFL, fl); | |
246 | return sfd; | |
247 | } | |
248 | ||
6144ed44 DW |
249 | static void term(int sig) |
250 | { | |
251 | sigterm = 1; | |
252 | } | |
253 | ||
4d43913c NB |
254 | static void wake_me(int sig) |
255 | { | |
256 | ||
257 | } | |
258 | ||
16ddab0d DW |
259 | /* if we are debugging and starting mdmon by hand then don't fork */ |
260 | static int do_fork(void) | |
261 | { | |
262 | #ifdef DEBUG | |
40ebbb9c | 263 | if (check_env("MDADM_NO_MDMON")) |
16ddab0d DW |
264 | return 0; |
265 | #endif | |
266 | ||
267 | return 1; | |
268 | } | |
269 | ||
13047e4c DW |
270 | void usage(void) |
271 | { | |
eb155f6d JS |
272 | fprintf(stderr, |
273 | "Usage: mdmon [options] CONTAINER\n" | |
274 | "\n" | |
275 | "Options are:\n" | |
276 | " --help -h : This message\n" | |
bf3a33b3 JS |
277 | " --all -a : All devices\n" |
278 | " --foreground -F : Run in foreground (do not fork)\n" | |
eb155f6d JS |
279 | " --takeover -t : Takeover container\n" |
280 | ); | |
13047e4c DW |
281 | exit(2); |
282 | } | |
16ddab0d | 283 | |
4dd2df09 | 284 | static int mdmon(char *devnm, int must_fork, int takeover); |
1ffd2840 | 285 | |
549e9569 NB |
286 | int main(int argc, char *argv[]) |
287 | { | |
13047e4c | 288 | char *container_name = NULL; |
4dd2df09 | 289 | char *devnm = NULL; |
1ffd2840 | 290 | int status = 0; |
eb155f6d | 291 | int opt; |
b5c727dc N |
292 | int all = 0; |
293 | int takeover = 0; | |
03041982 | 294 | int dofork = 1; |
eb155f6d JS |
295 | static struct option options[] = { |
296 | {"all", 0, NULL, 'a'}, | |
297 | {"takeover", 0, NULL, 't'}, | |
298 | {"help", 0, NULL, 'h'}, | |
da827518 | 299 | {"offroot", 0, NULL, OffRootOpt}, |
03041982 | 300 | {"foreground", 0, NULL, 'F'}, |
eb155f6d JS |
301 | {NULL, 0, NULL, 0} |
302 | }; | |
303 | ||
a9c15847 N |
304 | if (in_initrd()) { |
305 | /* | |
306 | * set first char of argv[0] to @. This is used by | |
307 | * systemd to signal that the task was launched from | |
308 | * initrd/initramfs and should be preserved during shutdown | |
309 | */ | |
310 | argv[0][0] = '@'; | |
311 | } | |
3e23ba9d | 312 | |
03041982 | 313 | while ((opt = getopt_long(argc, argv, "thaF", options, NULL)) != -1) { |
eb155f6d JS |
314 | switch (opt) { |
315 | case 'a': | |
316 | container_name = argv[optind-1]; | |
b5c727dc | 317 | all = 1; |
eb155f6d JS |
318 | break; |
319 | case 't': | |
b5c727dc | 320 | takeover = 1; |
eb155f6d | 321 | break; |
03041982 N |
322 | case 'F': |
323 | dofork = 0; | |
324 | break; | |
da827518 | 325 | case OffRootOpt: |
5d79c72e | 326 | argv[0][0] = '@'; |
da827518 | 327 | break; |
eb155f6d JS |
328 | case 'h': |
329 | default: | |
b5c727dc | 330 | usage(); |
eb155f6d JS |
331 | break; |
332 | } | |
333 | } | |
334 | ||
335 | if (all == 0 && container_name == NULL) { | |
336 | if (argv[optind]) | |
337 | container_name = argv[optind]; | |
549e9569 | 338 | } |
eb155f6d | 339 | |
eb49460b LB |
340 | if (container_name == NULL) |
341 | usage(); | |
13047e4c | 342 | |
eb155f6d JS |
343 | if (argc - optind > 1) |
344 | usage(); | |
345 | ||
346 | if (strcmp(container_name, "/proc/mdstat") == 0) | |
347 | all = 1; | |
348 | ||
b5c727dc | 349 | if (all) { |
1ffd2840 | 350 | struct mdstat_ent *mdstat, *e; |
eb49460b | 351 | int container_len = strlen(container_name); |
1ffd2840 DW |
352 | |
353 | /* launch an mdmon instance for each container found */ | |
1ffd2840 DW |
354 | mdstat = mdstat_read(0, 0); |
355 | for (e = mdstat; e; e = e->next) { | |
f4db7a6f MM |
356 | if (e->metadata_version && |
357 | strncmp(e->metadata_version, "external:", 9) == 0 && | |
1ffd2840 | 358 | !is_subarray(&e->metadata_version[9])) { |
1b34f519 DW |
359 | /* update cmdline so this mdmon instance can be |
360 | * distinguished from others in a call to ps(1) | |
361 | */ | |
4dd2df09 | 362 | if (strlen(e->devnm) <= (unsigned)container_len) { |
eb49460b | 363 | memset(container_name, 0, container_len); |
4dd2df09 | 364 | sprintf(container_name, "%s", e->devnm); |
1b34f519 | 365 | } |
4dd2df09 | 366 | status |= mdmon(e->devnm, 1, takeover); |
1ffd2840 DW |
367 | } |
368 | } | |
369 | free_mdstat(mdstat); | |
370 | ||
371 | return status; | |
372 | } else if (strncmp(container_name, "md", 2) == 0) { | |
4dd2df09 N |
373 | int id = devnm2devid(container_name); |
374 | if (id) | |
375 | devnm = container_name; | |
6f4098a6 DW |
376 | } else { |
377 | struct stat st; | |
378 | ||
6f4098a6 | 379 | if (stat(container_name, &st) == 0) |
4dd2df09 | 380 | devnm = xstrdup(stat2devnm(&st)); |
6f4098a6 DW |
381 | } |
382 | ||
4dd2df09 | 383 | if (!devnm) { |
a88e119f | 384 | pr_err("%s is not a valid md device name\n", |
e8a70c89 N |
385 | container_name); |
386 | exit(1); | |
387 | } | |
4dd2df09 | 388 | return mdmon(devnm, dofork && do_fork(), takeover); |
1ffd2840 DW |
389 | } |
390 | ||
4dd2df09 | 391 | static int mdmon(char *devnm, int must_fork, int takeover) |
1ffd2840 DW |
392 | { |
393 | int mdfd; | |
394 | struct mdinfo *mdi, *di; | |
395 | struct supertype *container; | |
396 | sigset_t set; | |
397 | struct sigaction act; | |
398 | int pfd[2]; | |
399 | int status; | |
400 | int ignore; | |
96a8270d | 401 | pid_t victim = -1; |
9f1da824 | 402 | int victim_sock = -1; |
1ffd2840 | 403 | |
4dd2df09 | 404 | dprintf("starting mdmon for %s\n", devnm); |
b928b5a0 | 405 | |
4dd2df09 | 406 | mdfd = open_dev(devnm); |
549e9569 | 407 | if (mdfd < 0) { |
a88e119f | 408 | pr_err("%s: %s\n", devnm, strerror(errno)); |
1ffd2840 | 409 | return 1; |
549e9569 | 410 | } |
549e9569 | 411 | |
9fe32043 | 412 | /* Fork, and have the child tell us when they are ready */ |
3e7312a9 | 413 | if (must_fork) { |
3d2c4fc7 | 414 | if (pipe(pfd) != 0) { |
a88e119f | 415 | pr_err("failed to create pipe\n"); |
1ffd2840 | 416 | return 1; |
3d2c4fc7 | 417 | } |
16ddab0d DW |
418 | switch(fork()) { |
419 | case -1: | |
a88e119f | 420 | pr_err("failed to fork: %s\n", strerror(errno)); |
1ffd2840 | 421 | return 1; |
16ddab0d DW |
422 | case 0: /* child */ |
423 | close(pfd[0]); | |
424 | break; | |
425 | default: /* parent */ | |
426 | close(pfd[1]); | |
427 | if (read(pfd[0], &status, sizeof(status)) != sizeof(status)) { | |
428 | wait(&status); | |
429 | status = WEXITSTATUS(status); | |
430 | } | |
5e57245e | 431 | close(pfd[0]); |
1ffd2840 | 432 | return status; |
9fe32043 | 433 | } |
16ddab0d DW |
434 | } else |
435 | pfd[0] = pfd[1] = -1; | |
549e9569 | 436 | |
503975b9 | 437 | container = xcalloc(1, sizeof(*container)); |
4dd2df09 | 438 | strcpy(container->devnm, devnm); |
13047e4c | 439 | container->arrays = NULL; |
96a8270d | 440 | container->sock = -1; |
13047e4c | 441 | |
4dd2df09 | 442 | mdi = sysfs_read(mdfd, container->devnm, GET_VERSION|GET_LEVEL|GET_DEVS); |
13047e4c DW |
443 | |
444 | if (!mdi) { | |
a88e119f | 445 | pr_err("failed to load sysfs info for %s\n", container->devnm); |
13047e4c DW |
446 | exit(3); |
447 | } | |
448 | if (mdi->array.level != UnSet) { | |
a88e119f | 449 | pr_err("%s is not a container - cannot monitor\n", devnm); |
13047e4c DW |
450 | exit(3); |
451 | } | |
452 | if (mdi->array.major_version != -1 || | |
453 | mdi->array.minor_version != -2) { | |
a88e119f | 454 | pr_err("%s does not use external metadata - cannot monitor\n", |
4dd2df09 | 455 | devnm); |
13047e4c DW |
456 | exit(3); |
457 | } | |
458 | ||
33414a01 | 459 | container->ss = version_to_superswitch(mdi->text_version); |
13047e4c | 460 | if (container->ss == NULL) { |
a88e119f | 461 | pr_err("%s uses unsupported metadata: %s\n", |
4dd2df09 | 462 | devnm, mdi->text_version); |
13047e4c DW |
463 | exit(3); |
464 | } | |
465 | ||
466 | container->devs = NULL; | |
467 | for (di = mdi->devs; di; di = di->next) { | |
503975b9 | 468 | struct mdinfo *cd = xmalloc(sizeof(*cd)); |
13047e4c DW |
469 | *cd = *di; |
470 | cd->next = container->devs; | |
471 | container->devs = cd; | |
472 | } | |
473 | sysfs_free(mdi); | |
549e9569 | 474 | |
883a6142 DW |
475 | /* SIGUSR is sent between parent and child. So both block it |
476 | * and enable it only with pselect. | |
477 | */ | |
478 | sigemptyset(&set); | |
479 | sigaddset(&set, SIGUSR1); | |
883a6142 DW |
480 | sigaddset(&set, SIGTERM); |
481 | sigprocmask(SIG_BLOCK, &set, NULL); | |
482 | act.sa_handler = wake_me; | |
483 | act.sa_flags = 0; | |
484 | sigaction(SIGUSR1, &act, NULL); | |
883a6142 DW |
485 | act.sa_handler = term; |
486 | sigaction(SIGTERM, &act, NULL); | |
487 | act.sa_handler = SIG_IGN; | |
488 | sigaction(SIGPIPE, &act, NULL); | |
489 | ||
4dd2df09 | 490 | victim = mdmon_pid(container->devnm); |
84a230d9 | 491 | if (victim >= 0) |
4dd2df09 | 492 | victim_sock = connect_monitor(container->devnm); |
13047e4c | 493 | |
13047e4c | 494 | ignore = chdir("/"); |
32f21701 N |
495 | if (!takeover && victim > 0 && victim_sock >= 0) { |
496 | if (fping_monitor(victim_sock) == 0) { | |
a88e119f | 497 | pr_err("%s already managed\n", container->devnm); |
b109d928 | 498 | exit(3); |
24cfdbc5 | 499 | } |
32f21701 | 500 | close(victim_sock); |
88e5516e | 501 | victim_sock = -1; |
549e9569 | 502 | } |
4dd2df09 | 503 | if (container->ss->load_container(container, mdfd, devnm)) { |
a88e119f | 504 | pr_err("Cannot load metadata for %s\n", devnm); |
549e9569 NB |
505 | exit(3); |
506 | } | |
e8a70c89 | 507 | close(mdfd); |
549e9569 | 508 | |
9fe32043 N |
509 | /* Ok, this is close enough. We can say goodbye to our parent now. |
510 | */ | |
fa716c83 | 511 | if (victim > 0) |
4dd2df09 N |
512 | remove_pidfile(devnm); |
513 | if (make_pidfile(devnm) < 0) { | |
753cf905 | 514 | exit(3); |
fa716c83 | 515 | } |
4dd2df09 | 516 | container->sock = make_control_sock(devnm); |
fa716c83 | 517 | |
9fe32043 | 518 | status = 0; |
5e57245e N |
519 | if (pfd[1] >= 0) { |
520 | if (write(pfd[1], &status, sizeof(status)) < 0) | |
521 | pr_err("failed to notify our parent: %d\n", | |
522 | getppid()); | |
523 | close(pfd[1]); | |
524 | } | |
9fe32043 | 525 | |
1373b07d | 526 | mlockall(MCL_CURRENT | MCL_FUTURE); |
549e9569 | 527 | |
3e70c845 | 528 | if (clone_monitor(container) < 0) { |
a88e119f | 529 | pr_err("failed to start monitor process: %s\n", |
549e9569 NB |
530 | strerror(errno)); |
531 | exit(2); | |
532 | } | |
533 | ||
fa716c83 | 534 | if (victim > 0) { |
4dd2df09 | 535 | try_kill_monitor(victim, container->devnm, victim_sock); |
88e5516e N |
536 | if (victim_sock >= 0) |
537 | close(victim_sock); | |
9f1da824 | 538 | } |
e98ef225 N |
539 | |
540 | setsid(); | |
541 | close(0); | |
542 | open("/dev/null", O_RDWR); | |
543 | close(1); | |
544 | ignore = dup(0); | |
545 | #ifndef DEBUG | |
546 | close(2); | |
547 | ignore = dup(0); | |
548 | #endif | |
549 | ||
e4c72d1d LB |
550 | /* This silliness is to stop the compiler complaining |
551 | * that we ignore 'ignore' | |
552 | */ | |
553 | if (ignore) | |
554 | ignore++; | |
555 | ||
549e9569 NB |
556 | do_manager(container); |
557 | ||
558 | exit(0); | |
559 | } | |
999b4972 N |
560 | |
561 | /* Some stub functions so super-* can link with us */ | |
562 | int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape, | |
563 | struct supertype *st, unsigned long blocks, | |
564 | int *fds, unsigned long long *offsets, | |
565 | int dests, int *destfd, unsigned long long *destoffsets) | |
566 | { | |
567 | return 0; | |
568 | } | |
afbbf073 AK |
569 | |
570 | int restore_stripes(int *dest, unsigned long long *offsets, | |
571 | int raid_disks, int chunk_size, int level, int layout, | |
572 | int source, unsigned long long read_offset, | |
573 | unsigned long long start, unsigned long long length, | |
574 | char *src_buf) | |
575 | { | |
576 | return 1; | |
577 | } | |
578 | ||
afbbf073 AK |
579 | int save_stripes(int *source, unsigned long long *offsets, |
580 | int raid_disks, int chunk_size, int level, int layout, | |
581 | int nwrites, int *dest, | |
582 | unsigned long long start, unsigned long long length, | |
583 | char *buf) | |
584 | { | |
585 | return 0; | |
586 | } | |
935a3254 N |
587 | |
588 | struct superswitch super0 = { | |
589 | .name = "0.90", | |
590 | }; | |
591 | struct superswitch super1 = { | |
592 | .name = "1.x", | |
593 | }; |