instance: avoid dumping invalid service instances - prevents a potential crash
[project/procd.git] / service / instance.c
1 /*
2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #include <sys/resource.h>
16 #include <sys/types.h>
17 #include <sys/socket.h>
18 #include <sys/stat.h>
19 #include <net/if.h>
20 #include <unistd.h>
21 #include <stdint.h>
22 #include <fcntl.h>
23 #include <pwd.h>
24 #include <libgen.h>
25 #include <unistd.h>
26
27 #include <libubox/md5.h>
28
29 #include "../procd.h"
30
31 #include "service.h"
32 #include "instance.h"
33
34
35 enum {
36 INSTANCE_ATTR_COMMAND,
37 INSTANCE_ATTR_ENV,
38 INSTANCE_ATTR_DATA,
39 INSTANCE_ATTR_NETDEV,
40 INSTANCE_ATTR_FILE,
41 INSTANCE_ATTR_TRIGGER,
42 INSTANCE_ATTR_RESPAWN,
43 INSTANCE_ATTR_NICE,
44 INSTANCE_ATTR_LIMITS,
45 INSTANCE_ATTR_WATCH,
46 INSTANCE_ATTR_ERROR,
47 INSTANCE_ATTR_USER,
48 INSTANCE_ATTR_STDOUT,
49 INSTANCE_ATTR_STDERR,
50 INSTANCE_ATTR_JAIL,
51 INSTANCE_ATTR_TRACE,
52 INSTANCE_ATTR_SECCOMP,
53 __INSTANCE_ATTR_MAX
54 };
55
56 static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = {
57 [INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY },
58 [INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
59 [INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
60 [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
61 [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY },
62 [INSTANCE_ATTR_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
63 [INSTANCE_ATTR_RESPAWN] = { "respawn", BLOBMSG_TYPE_ARRAY },
64 [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
65 [INSTANCE_ATTR_LIMITS] = { "limits", BLOBMSG_TYPE_TABLE },
66 [INSTANCE_ATTR_WATCH] = { "watch", BLOBMSG_TYPE_ARRAY },
67 [INSTANCE_ATTR_ERROR] = { "error", BLOBMSG_TYPE_ARRAY },
68 [INSTANCE_ATTR_USER] = { "user", BLOBMSG_TYPE_STRING },
69 [INSTANCE_ATTR_STDOUT] = { "stdout", BLOBMSG_TYPE_BOOL },
70 [INSTANCE_ATTR_STDERR] = { "stderr", BLOBMSG_TYPE_BOOL },
71 [INSTANCE_ATTR_JAIL] = { "jail", BLOBMSG_TYPE_TABLE },
72 [INSTANCE_ATTR_TRACE] = { "trace", BLOBMSG_TYPE_BOOL },
73 [INSTANCE_ATTR_SECCOMP] = { "seccomp", BLOBMSG_TYPE_STRING },
74 };
75
76 enum {
77 JAIL_ATTR_NAME,
78 JAIL_ATTR_ROOT,
79 JAIL_ATTR_PROCFS,
80 JAIL_ATTR_SYSFS,
81 JAIL_ATTR_UBUS,
82 JAIL_ATTR_LOG,
83 JAIL_ATTR_MOUNT,
84 __JAIL_ATTR_MAX,
85 };
86
87 static const struct blobmsg_policy jail_attr[__JAIL_ATTR_MAX] = {
88 [JAIL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
89 [JAIL_ATTR_ROOT] = { "root", BLOBMSG_TYPE_STRING },
90 [JAIL_ATTR_PROCFS] = { "procfs", BLOBMSG_TYPE_BOOL },
91 [JAIL_ATTR_SYSFS] = { "sysfs", BLOBMSG_TYPE_BOOL },
92 [JAIL_ATTR_UBUS] = { "ubus", BLOBMSG_TYPE_BOOL },
93 [JAIL_ATTR_LOG] = { "log", BLOBMSG_TYPE_BOOL },
94 [JAIL_ATTR_MOUNT] = { "mount", BLOBMSG_TYPE_TABLE },
95 };
96
97 struct instance_netdev {
98 struct blobmsg_list_node node;
99 int ifindex;
100 };
101
102 struct instance_file {
103 struct blobmsg_list_node node;
104 uint32_t md5[4];
105 };
106
107 struct rlimit_name {
108 const char *name;
109 int resource;
110 };
111
112 static const struct rlimit_name rlimit_names[] = {
113 { "as", RLIMIT_AS },
114 { "core", RLIMIT_CORE },
115 { "cpu", RLIMIT_CPU },
116 { "data", RLIMIT_DATA },
117 { "fsize", RLIMIT_FSIZE },
118 { "memlock", RLIMIT_MEMLOCK },
119 { "msgqueue", RLIMIT_MSGQUEUE },
120 { "nice", RLIMIT_NICE },
121 { "nofile", RLIMIT_NOFILE },
122 { "nproc", RLIMIT_NPROC },
123 { "rss", RLIMIT_RSS },
124 { "rtprio", RLIMIT_RTPRIO },
125 { "sigpending", RLIMIT_SIGPENDING },
126 { "stack", RLIMIT_STACK },
127 { NULL, 0 }
128 };
129
130 static char trace[] = "/sbin/utrace";
131
132 static void closefd(int fd)
133 {
134 if (fd > STDERR_FILENO)
135 close(fd);
136 }
137
138 static void
139 instance_limits(const char *limit, const char *value)
140 {
141 int i;
142 struct rlimit rlim;
143 unsigned long cur, max;
144
145 for (i = 0; rlimit_names[i].name != NULL; i++) {
146 if (strcmp(rlimit_names[i].name, limit))
147 continue;
148 if (!strcmp(value, "unlimited")) {
149 rlim.rlim_cur = RLIM_INFINITY;
150 rlim.rlim_max = RLIM_INFINITY;
151 } else {
152 if (getrlimit(rlimit_names[i].resource, &rlim))
153 return;
154
155 cur = rlim.rlim_cur;
156 max = rlim.rlim_max;
157
158 if (sscanf(value, "%lu %lu", &cur, &max) < 1)
159 return;
160
161 rlim.rlim_cur = cur;
162 rlim.rlim_max = max;
163 }
164
165 setrlimit(rlimit_names[i].resource, &rlim);
166 return;
167 }
168 }
169
170 static inline int
171 jail_run(struct service_instance *in, char **argv)
172 {
173 struct blobmsg_list_node *var;
174 struct jail *jail = &in->jail;
175 int argc = 0;
176
177 argv[argc++] = "/sbin/ujail";
178
179 if (jail->name) {
180 argv[argc++] = "-n";
181 argv[argc++] = jail->name;
182 }
183
184 if (jail->root) {
185 argv[argc++] = "-P";
186 argv[argc++] = jail->root;
187 }
188
189 if (in->seccomp) {
190 argv[argc++] = "-S";
191 argv[argc++] = in->seccomp;
192 }
193
194 if (jail->procfs)
195 argv[argc++] = "-p";
196
197 if (jail->sysfs)
198 argv[argc++] = "-s";
199
200 if (jail->ubus)
201 argv[argc++] = "-u";
202
203 if (jail->log)
204 argv[argc++] = "-l";
205
206 blobmsg_list_for_each(&jail->mount, var) {
207 const char *type = blobmsg_data(var->data);
208
209 if (*type == '1')
210 argv[argc++] = "-w";
211 else
212 argv[argc++] = "-r";
213 argv[argc++] = (char *) blobmsg_name(var->data);
214 }
215
216 argv[argc++] = "--";
217
218 return argc;
219 }
220
221 static void
222 instance_run(struct service_instance *in, int _stdout, int _stderr)
223 {
224 struct blobmsg_list_node *var;
225 struct blob_attr *cur;
226 char **argv;
227 int argc = 1; /* NULL terminated */
228 int rem, _stdin;
229
230 if (in->nice)
231 setpriority(PRIO_PROCESS, 0, in->nice);
232
233 blobmsg_for_each_attr(cur, in->command, rem)
234 argc++;
235
236 blobmsg_list_for_each(&in->env, var)
237 setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1);
238
239 if (!in->trace && !in->has_jail && in->seccomp) {
240 setenv("SECCOMP_FILE", in->seccomp, 1);
241 setenv("LD_PRELOAD", "/lib/libpreload-seccomp.so", 1);
242 }
243
244 blobmsg_list_for_each(&in->limits, var)
245 instance_limits(blobmsg_name(var->data), blobmsg_data(var->data));
246
247 if (in->trace)
248 argc += 1;
249
250 argv = alloca(sizeof(char *) * (argc + in->jail.argc));
251 argc = 0;
252
253 if (in->trace)
254 argv[argc++] = trace;
255
256 if (in->has_jail)
257 argc = jail_run(in, argv);
258
259 blobmsg_for_each_attr(cur, in->command, rem)
260 argv[argc++] = blobmsg_data(cur);
261
262 argv[argc] = NULL;
263
264 _stdin = open("/dev/null", O_RDONLY);
265
266 if (_stdout == -1)
267 _stdout = open("/dev/null", O_WRONLY);
268
269 if (_stderr == -1)
270 _stderr = open("/dev/null", O_WRONLY);
271
272 if (_stdin > -1) {
273 dup2(_stdin, STDIN_FILENO);
274 closefd(_stdin);
275 }
276 if (_stdout > -1) {
277 dup2(_stdout, STDOUT_FILENO);
278 closefd(_stdout);
279 }
280 if (_stderr > -1) {
281 dup2(_stderr, STDERR_FILENO);
282 closefd(_stderr);
283 }
284
285 if (in->uid || in->gid) {
286 if (setuid(in->uid) || setgid(in->gid)) {
287 ERROR("failed to set uid:%d, gid:%d\n", in->uid, in->gid);
288 exit(127);
289 }
290 }
291 execvp(argv[0], argv);
292 exit(127);
293 }
294
295 void
296 instance_start(struct service_instance *in)
297 {
298 int pid;
299 int opipe[2] = { -1, -1 };
300 int epipe[2] = { -1, -1 };
301
302 if (!avl_is_empty(&in->errors.avl)) {
303 LOG("Not starting instance %s::%s, an error was indicated\n", in->srv->name, in->name);
304 return;
305 }
306
307 if (in->proc.pending)
308 return;
309
310 if (in->_stdout.fd.fd > -2) {
311 if (pipe(opipe)) {
312 ULOG_WARN("pipe() failed: %d (%s)\n", errno, strerror(errno));
313 opipe[0] = opipe[1] = -1;
314 }
315 }
316
317 if (in->_stderr.fd.fd > -2) {
318 if (pipe(epipe)) {
319 ULOG_WARN("pipe() failed: %d (%s)\n", errno, strerror(errno));
320 epipe[0] = epipe[1] = -1;
321 }
322 }
323
324 in->restart = false;
325 in->halt = !in->respawn;
326
327 if (!in->valid)
328 return;
329
330 pid = fork();
331 if (pid < 0)
332 return;
333
334 if (!pid) {
335 uloop_done();
336 closefd(opipe[0]);
337 closefd(epipe[0]);
338 instance_run(in, opipe[1], epipe[1]);
339 return;
340 }
341
342 DEBUG(2, "Started instance %s::%s\n", in->srv->name, in->name);
343 in->proc.pid = pid;
344 clock_gettime(CLOCK_MONOTONIC, &in->start);
345 uloop_process_add(&in->proc);
346
347 if (opipe[0] > -1) {
348 ustream_fd_init(&in->_stdout, opipe[0]);
349 closefd(opipe[1]);
350 }
351
352 if (epipe[0] > -1) {
353 ustream_fd_init(&in->_stderr, epipe[0]);
354 closefd(epipe[1]);
355 }
356
357 service_event("instance.start", in->srv->name, in->name);
358 }
359
360 static void
361 instance_stdio(struct ustream *s, int prio, struct service_instance *in)
362 {
363 char *newline, *str, *arg0, ident[32];
364 int len;
365
366 do {
367 str = ustream_get_read_buf(s, NULL);
368 if (!str)
369 break;
370
371 newline = strchr(str, '\n');
372 if (!newline)
373 break;
374
375 *newline = 0;
376 len = newline + 1 - str;
377
378 arg0 = basename(blobmsg_data(blobmsg_data(in->command)));
379 snprintf(ident, sizeof(ident), "%s[%d]", arg0, in->proc.pid);
380
381 ulog_open(ULOG_SYSLOG, LOG_DAEMON, ident);
382 ulog(prio, "%s\n", str);
383 ulog_open(ULOG_SYSLOG, LOG_DAEMON, "procd");
384
385 ustream_consume(s, len);
386 } while (1);
387 }
388
389 static void
390 instance_stdout(struct ustream *s, int bytes)
391 {
392 instance_stdio(s, LOG_INFO,
393 container_of(s, struct service_instance, _stdout.stream));
394 }
395
396 static void
397 instance_stderr(struct ustream *s, int bytes)
398 {
399 instance_stdio(s, LOG_ERR,
400 container_of(s, struct service_instance, _stderr.stream));
401 }
402
403 static void
404 instance_timeout(struct uloop_timeout *t)
405 {
406 struct service_instance *in;
407
408 in = container_of(t, struct service_instance, timeout);
409
410 if (!in->halt && (in->restart || in->respawn))
411 instance_start(in);
412 }
413
414 static void
415 instance_exit(struct uloop_process *p, int ret)
416 {
417 struct service_instance *in;
418 struct timespec tp;
419 long runtime;
420
421 in = container_of(p, struct service_instance, proc);
422
423 clock_gettime(CLOCK_MONOTONIC, &tp);
424 runtime = tp.tv_sec - in->start.tv_sec;
425
426 DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in->srv->name, in->name, ret, runtime);
427 if (upgrade_running)
428 return;
429
430 uloop_timeout_cancel(&in->timeout);
431 if (in->halt) {
432 /* no action */
433 } else if (in->restart) {
434 instance_start(in);
435 } else if (in->respawn) {
436 if (runtime < in->respawn_threshold)
437 in->respawn_count++;
438 else
439 in->respawn_count = 0;
440 if (in->respawn_count > in->respawn_retry && in->respawn_retry > 0 ) {
441 LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
442 in->srv->name, in->name, in->respawn_count, runtime);
443 in->restart = in->respawn = 0;
444 in->halt = 1;
445 } else {
446 uloop_timeout_set(&in->timeout, in->respawn_timeout * 1000);
447 }
448 }
449 service_event("instance.stop", in->srv->name, in->name);
450 }
451
452 void
453 instance_stop(struct service_instance *in)
454 {
455 if (!in->proc.pending)
456 return;
457 in->halt = true;
458 in->restart = in->respawn = false;
459 kill(in->proc.pid, SIGTERM);
460 }
461
462 static void
463 instance_restart(struct service_instance *in)
464 {
465 if (!in->proc.pending)
466 return;
467 in->halt = false;
468 in->restart = true;
469 kill(in->proc.pid, SIGTERM);
470 }
471
472 static bool
473 instance_config_changed(struct service_instance *in, struct service_instance *in_new)
474 {
475 if (!in->valid)
476 return true;
477
478 if (!blob_attr_equal(in->command, in_new->command))
479 return true;
480
481 if (!blobmsg_list_equal(&in->env, &in_new->env))
482 return true;
483
484 if (!blobmsg_list_equal(&in->data, &in_new->data))
485 return true;
486
487 if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
488 return true;
489
490 if (!blobmsg_list_equal(&in->file, &in_new->file))
491 return true;
492
493 if (in->nice != in_new->nice)
494 return true;
495
496 if (in->uid != in_new->uid)
497 return true;
498
499 if (in->gid != in_new->gid)
500 return true;
501
502 if (!blobmsg_list_equal(&in->limits, &in_new->limits))
503 return true;
504
505 if (!blobmsg_list_equal(&in->jail.mount, &in_new->jail.mount))
506 return true;
507
508 if (!blobmsg_list_equal(&in->errors, &in_new->errors))
509 return true;
510
511 return false;
512 }
513
514 static bool
515 instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
516 {
517 struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
518 struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
519
520 return n1->ifindex == n2->ifindex;
521 }
522
523 static void
524 instance_netdev_update(struct blobmsg_list_node *l)
525 {
526 struct instance_netdev *n = container_of(l, struct instance_netdev, node);
527
528 n->ifindex = if_nametoindex(n->node.avl.key);
529 }
530
531 static bool
532 instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
533 {
534 struct instance_file *f1 = container_of(l1, struct instance_file, node);
535 struct instance_file *f2 = container_of(l2, struct instance_file, node);
536
537 return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
538 }
539
540 static void
541 instance_file_update(struct blobmsg_list_node *l)
542 {
543 struct instance_file *f = container_of(l, struct instance_file, node);
544 md5_ctx_t md5;
545 char buf[256];
546 int len, fd;
547
548 memset(f->md5, 0, sizeof(f->md5));
549
550 fd = open(l->avl.key, O_RDONLY);
551 if (fd < 0)
552 return;
553
554 md5_begin(&md5);
555 do {
556 len = read(fd, buf, sizeof(buf));
557 if (len < 0) {
558 if (errno == EINTR)
559 continue;
560
561 break;
562 }
563 if (!len)
564 break;
565
566 md5_hash(buf, len, &md5);
567 } while(1);
568
569 md5_end(f->md5, &md5);
570 close(fd);
571 }
572
573 static void
574 instance_fill_any(struct blobmsg_list *l, struct blob_attr *cur)
575 {
576 if (!cur)
577 return;
578
579 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), false);
580 }
581
582 static bool
583 instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
584 {
585 struct blobmsg_list_node *node;
586
587 if (!cur)
588 return true;
589
590 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
591 return false;
592
593 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
594 if (cb) {
595 blobmsg_list_for_each(l, node)
596 cb(node);
597 }
598 return true;
599 }
600
601 static int
602 instance_jail_parse(struct service_instance *in, struct blob_attr *attr)
603 {
604 struct blob_attr *tb[__JAIL_ATTR_MAX];
605 struct jail *jail = &in->jail;
606 struct stat s;
607
608 if (stat("/sbin/ujail", &s))
609 return 0;
610
611 blobmsg_parse(jail_attr, __JAIL_ATTR_MAX, tb,
612 blobmsg_data(attr), blobmsg_data_len(attr));
613
614 jail->argc = 2;
615
616 if (tb[JAIL_ATTR_NAME]) {
617 jail->name = blobmsg_get_string(tb[JAIL_ATTR_NAME]);
618 jail->argc += 2;
619 }
620 if (tb[JAIL_ATTR_ROOT]) {
621 jail->root = blobmsg_get_string(tb[JAIL_ATTR_ROOT]);
622 jail->argc += 2;
623 }
624 if (tb[JAIL_ATTR_PROCFS]) {
625 jail->procfs = blobmsg_get_bool(tb[JAIL_ATTR_PROCFS]);
626 jail->argc++;
627 }
628 if (tb[JAIL_ATTR_SYSFS]) {
629 jail->sysfs = blobmsg_get_bool(tb[JAIL_ATTR_SYSFS]);
630 jail->argc++;
631 }
632 if (tb[JAIL_ATTR_UBUS]) {
633 jail->ubus = blobmsg_get_bool(tb[JAIL_ATTR_UBUS]);
634 jail->argc++;
635 }
636 if (tb[JAIL_ATTR_LOG]) {
637 jail->log = blobmsg_get_bool(tb[JAIL_ATTR_LOG]);
638 jail->argc++;
639 }
640 if (tb[JAIL_ATTR_MOUNT]) {
641 struct blob_attr *cur;
642 int rem;
643
644 blobmsg_for_each_attr(cur, tb[JAIL_ATTR_MOUNT], rem)
645 jail->argc += 2;
646 instance_fill_array(&jail->mount, tb[JAIL_ATTR_MOUNT], NULL, false);
647 }
648 if (in->seccomp)
649 jail->argc += 2;
650
651 return 1;
652 }
653
654 static bool
655 instance_config_parse(struct service_instance *in)
656 {
657 struct blob_attr *tb[__INSTANCE_ATTR_MAX];
658 struct blob_attr *cur, *cur2;
659 int argc = 0;
660 int rem;
661
662 blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
663 blobmsg_data(in->config), blobmsg_data_len(in->config));
664
665 cur = tb[INSTANCE_ATTR_COMMAND];
666 if (!cur)
667 return false;
668
669 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
670 return false;
671
672 blobmsg_for_each_attr(cur2, cur, rem) {
673 argc++;
674 break;
675 }
676 if (!argc)
677 return false;
678
679 in->command = cur;
680
681 if (tb[INSTANCE_ATTR_RESPAWN]) {
682 int i = 0;
683 uint32_t vals[3] = { 3600, 5, 5};
684
685 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_RESPAWN], rem) {
686 if ((i >= 3) && (blobmsg_type(cur2) == BLOBMSG_TYPE_STRING))
687 continue;
688 vals[i] = atoi(blobmsg_get_string(cur2));
689 i++;
690 }
691 in->respawn = true;
692 in->respawn_count = 0;
693 in->respawn_threshold = vals[0];
694 in->respawn_timeout = vals[1];
695 in->respawn_retry = vals[2];
696 }
697 if (tb[INSTANCE_ATTR_TRIGGER]) {
698 in->trigger = tb[INSTANCE_ATTR_TRIGGER];
699 trigger_add(in->trigger, in);
700 }
701
702 if (tb[INSTANCE_ATTR_WATCH]) {
703 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_WATCH], rem) {
704 if (blobmsg_type(cur2) != BLOBMSG_TYPE_STRING)
705 continue;
706 DEBUG(3, "watch for %s\n", blobmsg_get_string(cur2));
707 watch_add(blobmsg_get_string(cur2), in);
708 }
709 }
710
711 if ((cur = tb[INSTANCE_ATTR_NICE])) {
712 in->nice = (int8_t) blobmsg_get_u32(cur);
713 if (in->nice < -20 || in->nice > 20)
714 return false;
715 }
716
717 if (tb[INSTANCE_ATTR_USER]) {
718 struct passwd *p = getpwnam(blobmsg_get_string(tb[INSTANCE_ATTR_USER]));
719 if (p) {
720 in->uid = p->pw_uid;
721 in->gid = p->pw_gid;
722 }
723 }
724
725 if (tb[INSTANCE_ATTR_TRACE])
726 in->trace = blobmsg_get_bool(tb[INSTANCE_ATTR_TRACE]);
727
728 if (!in->trace && tb[INSTANCE_ATTR_SECCOMP]) {
729 char *seccomp = blobmsg_get_string(tb[INSTANCE_ATTR_SECCOMP]);
730 struct stat s;
731
732 if (stat(seccomp, &s))
733 ERROR("%s: not starting seccomp as %s is missing\n", in->name, seccomp);
734 else
735 in->seccomp = seccomp;
736 }
737 if (!in->trace && tb[INSTANCE_ATTR_JAIL])
738 in->has_jail = instance_jail_parse(in, tb[INSTANCE_ATTR_JAIL]);
739
740 if (tb[INSTANCE_ATTR_STDOUT] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDOUT]))
741 in->_stdout.fd.fd = -1;
742
743 if (tb[INSTANCE_ATTR_STDERR] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDERR]))
744 in->_stderr.fd.fd = -1;
745
746 instance_fill_any(&in->data, tb[INSTANCE_ATTR_DATA]);
747
748 if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
749 return false;
750
751 if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
752 return false;
753
754 if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
755 return false;
756
757 if (!instance_fill_array(&in->limits, tb[INSTANCE_ATTR_LIMITS], NULL, false))
758 return false;
759
760 if (!instance_fill_array(&in->errors, tb[INSTANCE_ATTR_ERROR], NULL, true))
761 return false;
762
763 return true;
764 }
765
766 static void
767 instance_config_cleanup(struct service_instance *in)
768 {
769 blobmsg_list_free(&in->env);
770 blobmsg_list_free(&in->data);
771 blobmsg_list_free(&in->netdev);
772 blobmsg_list_free(&in->file);
773 blobmsg_list_free(&in->limits);
774 blobmsg_list_free(&in->errors);
775 blobmsg_list_free(&in->jail.mount);
776 }
777
778 static void
779 instance_config_move(struct service_instance *in, struct service_instance *in_src)
780 {
781 instance_config_cleanup(in);
782 blobmsg_list_move(&in->env, &in_src->env);
783 blobmsg_list_move(&in->data, &in_src->data);
784 blobmsg_list_move(&in->netdev, &in_src->netdev);
785 blobmsg_list_move(&in->file, &in_src->file);
786 blobmsg_list_move(&in->limits, &in_src->limits);
787 blobmsg_list_move(&in->errors, &in_src->errors);
788 blobmsg_list_move(&in->jail.mount, &in_src->jail.mount);
789 in->trigger = in_src->trigger;
790 in->command = in_src->command;
791 in->name = in_src->name;
792 in->node.avl.key = in_src->node.avl.key;
793
794 free(in->config);
795 in->config = in_src->config;
796 in_src->config = NULL;
797 }
798
799 bool
800 instance_update(struct service_instance *in, struct service_instance *in_new)
801 {
802 bool changed = instance_config_changed(in, in_new);
803 bool running = in->proc.pending;
804
805 if (!changed && running)
806 return false;
807
808 if (!running) {
809 if (changed)
810 instance_config_move(in, in_new);
811 instance_start(in);
812 } else {
813 instance_restart(in);
814 instance_config_move(in, in_new);
815 /* restart happens in the child callback handler */
816 }
817 return true;
818 }
819
820 void
821 instance_free(struct service_instance *in)
822 {
823 if (in->_stdout.fd.fd > -1) {
824 ustream_free(&in->_stdout.stream);
825 close(in->_stdout.fd.fd);
826 }
827
828 if (in->_stderr.fd.fd > -1) {
829 ustream_free(&in->_stderr.stream);
830 close(in->_stderr.fd.fd);
831 }
832
833 uloop_process_delete(&in->proc);
834 uloop_timeout_cancel(&in->timeout);
835 trigger_del(in);
836 watch_del(in);
837 instance_config_cleanup(in);
838 free(in->config);
839 free(in);
840 }
841
842 void
843 instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
844 {
845 config = blob_memdup(config);
846 in->srv = s;
847 in->name = blobmsg_name(config);
848 in->config = config;
849 in->timeout.cb = instance_timeout;
850 in->proc.cb = instance_exit;
851
852 in->_stdout.fd.fd = -2;
853 in->_stdout.stream.string_data = true;
854 in->_stdout.stream.notify_read = instance_stdout;
855
856 in->_stderr.fd.fd = -2;
857 in->_stderr.stream.string_data = true;
858 in->_stderr.stream.notify_read = instance_stderr;
859
860 blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
861 blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
862 blobmsg_list_simple_init(&in->env);
863 blobmsg_list_simple_init(&in->data);
864 blobmsg_list_simple_init(&in->limits);
865 blobmsg_list_simple_init(&in->errors);
866 blobmsg_list_simple_init(&in->jail.mount);
867 in->valid = instance_config_parse(in);
868 }
869
870 void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
871 {
872 void *i;
873
874 if (!in->valid)
875 return;
876
877 i = blobmsg_open_table(b, in->name);
878 blobmsg_add_u8(b, "running", in->proc.pending);
879 if (in->proc.pending)
880 blobmsg_add_u32(b, "pid", in->proc.pid);
881 blobmsg_add_blob(b, in->command);
882
883 if (!avl_is_empty(&in->errors.avl)) {
884 struct blobmsg_list_node *var;
885 void *e = blobmsg_open_array(b, "errors");
886 blobmsg_list_for_each(&in->errors, var)
887 blobmsg_add_string(b, NULL, blobmsg_data(var->data));
888 blobmsg_close_table(b, e);
889 }
890
891 if (!avl_is_empty(&in->env.avl)) {
892 struct blobmsg_list_node *var;
893 void *e = blobmsg_open_table(b, "env");
894 blobmsg_list_for_each(&in->env, var)
895 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
896 blobmsg_close_table(b, e);
897 }
898
899 if (!avl_is_empty(&in->data.avl)) {
900 struct blobmsg_list_node *var;
901 void *e = blobmsg_open_table(b, "data");
902 blobmsg_list_for_each(&in->data, var)
903 blobmsg_add_blob(b, var->data);
904 blobmsg_close_table(b, e);
905 }
906
907 if (!avl_is_empty(&in->limits.avl)) {
908 struct blobmsg_list_node *var;
909 void *e = blobmsg_open_table(b, "limits");
910 blobmsg_list_for_each(&in->limits, var)
911 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
912 blobmsg_close_table(b, e);
913 }
914
915 if (in->respawn) {
916 void *r = blobmsg_open_table(b, "respawn");
917 blobmsg_add_u32(b, "timeout", in->respawn_timeout);
918 blobmsg_add_u32(b, "threshold", in->respawn_threshold);
919 blobmsg_add_u32(b, "retry", in->respawn_retry);
920 blobmsg_close_table(b, r);
921 }
922
923 if (in->trace)
924 blobmsg_add_u8(b, "trace", true);
925
926 if (in->seccomp)
927 blobmsg_add_string(b, "seccomp", in->seccomp);
928
929 if (in->has_jail) {
930 void *r = blobmsg_open_table(b, "jail");
931 if (in->jail.name)
932 blobmsg_add_string(b, "name", in->jail.name);
933 if (in->jail.root)
934 blobmsg_add_string(b, "root", in->jail.root);
935 blobmsg_add_u8(b, "procfs", in->jail.procfs);
936 blobmsg_add_u8(b, "sysfs", in->jail.sysfs);
937 blobmsg_add_u8(b, "ubus", in->jail.ubus);
938 blobmsg_add_u8(b, "log", in->jail.log);
939 blobmsg_close_table(b, r);
940 if (!avl_is_empty(&in->jail.mount.avl)) {
941 struct blobmsg_list_node *var;
942 void *e = blobmsg_open_table(b, "mount");
943 blobmsg_list_for_each(&in->jail.mount, var)
944 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
945 blobmsg_close_table(b, e);
946 }
947 }
948
949 if (verbose && in->trigger)
950 blobmsg_add_blob(b, in->trigger);
951
952 blobmsg_close_table(b, i);
953 }