procd: Add %m to several functions that return errno.
[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 #define _GNU_SOURCE
16 #include <sys/resource.h>
17 #include <sys/types.h>
18 #include <sys/socket.h>
19 #include <sys/stat.h>
20 #include <net/if.h>
21 #include <unistd.h>
22 #include <stdint.h>
23 #include <stdio.h>
24 #include <fcntl.h>
25 #include <pwd.h>
26 #include <libgen.h>
27 #include <unistd.h>
28
29 #include <libubox/md5.h>
30
31 #include "../procd.h"
32
33 #include "service.h"
34 #include "instance.h"
35
36
37 enum {
38 INSTANCE_ATTR_COMMAND,
39 INSTANCE_ATTR_ENV,
40 INSTANCE_ATTR_DATA,
41 INSTANCE_ATTR_NETDEV,
42 INSTANCE_ATTR_FILE,
43 INSTANCE_ATTR_TRIGGER,
44 INSTANCE_ATTR_RESPAWN,
45 INSTANCE_ATTR_NICE,
46 INSTANCE_ATTR_LIMITS,
47 INSTANCE_ATTR_WATCH,
48 INSTANCE_ATTR_ERROR,
49 INSTANCE_ATTR_USER,
50 INSTANCE_ATTR_STDOUT,
51 INSTANCE_ATTR_STDERR,
52 INSTANCE_ATTR_NO_NEW_PRIVS,
53 INSTANCE_ATTR_JAIL,
54 INSTANCE_ATTR_TRACE,
55 INSTANCE_ATTR_SECCOMP,
56 INSTANCE_ATTR_PIDFILE,
57 INSTANCE_ATTR_RELOADSIG,
58 INSTANCE_ATTR_TERMTIMEOUT,
59 __INSTANCE_ATTR_MAX
60 };
61
62 static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = {
63 [INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY },
64 [INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
65 [INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
66 [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
67 [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY },
68 [INSTANCE_ATTR_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
69 [INSTANCE_ATTR_RESPAWN] = { "respawn", BLOBMSG_TYPE_ARRAY },
70 [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
71 [INSTANCE_ATTR_LIMITS] = { "limits", BLOBMSG_TYPE_TABLE },
72 [INSTANCE_ATTR_WATCH] = { "watch", BLOBMSG_TYPE_ARRAY },
73 [INSTANCE_ATTR_ERROR] = { "error", BLOBMSG_TYPE_ARRAY },
74 [INSTANCE_ATTR_USER] = { "user", BLOBMSG_TYPE_STRING },
75 [INSTANCE_ATTR_STDOUT] = { "stdout", BLOBMSG_TYPE_BOOL },
76 [INSTANCE_ATTR_STDERR] = { "stderr", BLOBMSG_TYPE_BOOL },
77 [INSTANCE_ATTR_NO_NEW_PRIVS] = { "no_new_privs", BLOBMSG_TYPE_BOOL },
78 [INSTANCE_ATTR_JAIL] = { "jail", BLOBMSG_TYPE_TABLE },
79 [INSTANCE_ATTR_TRACE] = { "trace", BLOBMSG_TYPE_BOOL },
80 [INSTANCE_ATTR_SECCOMP] = { "seccomp", BLOBMSG_TYPE_STRING },
81 [INSTANCE_ATTR_PIDFILE] = { "pidfile", BLOBMSG_TYPE_STRING },
82 [INSTANCE_ATTR_RELOADSIG] = { "reload_signal", BLOBMSG_TYPE_INT32 },
83 [INSTANCE_ATTR_TERMTIMEOUT] = { "term_timeout", BLOBMSG_TYPE_INT32 },
84 };
85
86 enum {
87 JAIL_ATTR_NAME,
88 JAIL_ATTR_HOSTNAME,
89 JAIL_ATTR_PROCFS,
90 JAIL_ATTR_SYSFS,
91 JAIL_ATTR_UBUS,
92 JAIL_ATTR_LOG,
93 JAIL_ATTR_RONLY,
94 JAIL_ATTR_MOUNT,
95 __JAIL_ATTR_MAX,
96 };
97
98 static const struct blobmsg_policy jail_attr[__JAIL_ATTR_MAX] = {
99 [JAIL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
100 [JAIL_ATTR_HOSTNAME] = { "hostname", BLOBMSG_TYPE_STRING },
101 [JAIL_ATTR_PROCFS] = { "procfs", BLOBMSG_TYPE_BOOL },
102 [JAIL_ATTR_SYSFS] = { "sysfs", BLOBMSG_TYPE_BOOL },
103 [JAIL_ATTR_UBUS] = { "ubus", BLOBMSG_TYPE_BOOL },
104 [JAIL_ATTR_LOG] = { "log", BLOBMSG_TYPE_BOOL },
105 [JAIL_ATTR_RONLY] = { "ronly", BLOBMSG_TYPE_BOOL },
106 [JAIL_ATTR_MOUNT] = { "mount", BLOBMSG_TYPE_TABLE },
107 };
108
109 struct instance_netdev {
110 struct blobmsg_list_node node;
111 int ifindex;
112 };
113
114 struct instance_file {
115 struct blobmsg_list_node node;
116 uint32_t md5[4];
117 };
118
119 struct rlimit_name {
120 const char *name;
121 int resource;
122 };
123
124 static const struct rlimit_name rlimit_names[] = {
125 { "as", RLIMIT_AS },
126 { "core", RLIMIT_CORE },
127 { "cpu", RLIMIT_CPU },
128 { "data", RLIMIT_DATA },
129 { "fsize", RLIMIT_FSIZE },
130 { "memlock", RLIMIT_MEMLOCK },
131 { "nofile", RLIMIT_NOFILE },
132 { "nproc", RLIMIT_NPROC },
133 { "rss", RLIMIT_RSS },
134 { "stack", RLIMIT_STACK },
135 #ifdef linux
136 { "nice", RLIMIT_NICE },
137 { "rtprio", RLIMIT_RTPRIO },
138 { "msgqueue", RLIMIT_MSGQUEUE },
139 { "sigpending", RLIMIT_SIGPENDING },
140 #endif
141 { NULL, 0 }
142 };
143
144 static void closefd(int fd)
145 {
146 if (fd > STDERR_FILENO)
147 close(fd);
148 }
149
150 static void
151 instance_limits(const char *limit, const char *value)
152 {
153 int i;
154 struct rlimit rlim;
155 unsigned long cur, max;
156
157 for (i = 0; rlimit_names[i].name != NULL; i++) {
158 if (strcmp(rlimit_names[i].name, limit))
159 continue;
160 if (!strcmp(value, "unlimited")) {
161 rlim.rlim_cur = RLIM_INFINITY;
162 rlim.rlim_max = RLIM_INFINITY;
163 } else {
164 if (getrlimit(rlimit_names[i].resource, &rlim))
165 return;
166
167 cur = rlim.rlim_cur;
168 max = rlim.rlim_max;
169
170 if (sscanf(value, "%lu %lu", &cur, &max) < 1)
171 return;
172
173 rlim.rlim_cur = cur;
174 rlim.rlim_max = max;
175 }
176
177 setrlimit(rlimit_names[i].resource, &rlim);
178 return;
179 }
180 }
181
182 static inline int
183 jail_run(struct service_instance *in, char **argv)
184 {
185 struct blobmsg_list_node *var;
186 struct jail *jail = &in->jail;
187 int argc = 0;
188
189 argv[argc++] = "/sbin/ujail";
190
191 if (jail->name) {
192 argv[argc++] = "-n";
193 argv[argc++] = jail->name;
194 }
195
196 if (jail->hostname) {
197 argv[argc++] = "-h";
198 argv[argc++] = jail->hostname;
199 }
200
201 if (in->seccomp) {
202 argv[argc++] = "-S";
203 argv[argc++] = in->seccomp;
204 }
205
206 if (in->no_new_privs)
207 argv[argc++] = "-c";
208
209 if (jail->procfs)
210 argv[argc++] = "-p";
211
212 if (jail->sysfs)
213 argv[argc++] = "-s";
214
215 if (jail->ubus)
216 argv[argc++] = "-u";
217
218 if (jail->log)
219 argv[argc++] = "-l";
220
221 if (jail->ronly)
222 argv[argc++] = "-o";
223
224 blobmsg_list_for_each(&jail->mount, var) {
225 const char *type = blobmsg_data(var->data);
226
227 if (*type == '1')
228 argv[argc++] = "-w";
229 else
230 argv[argc++] = "-r";
231 argv[argc++] = (char *) blobmsg_name(var->data);
232 }
233
234 argv[argc++] = "--";
235
236 return argc;
237 }
238
239 static int
240 instance_removepid(struct service_instance *in) {
241 if (!in->pidfile)
242 return 0;
243 if (unlink(in->pidfile)) {
244 ERROR("Failed to removed pidfile: %s: %m\n", in->pidfile);
245 return 1;
246 }
247 return 0;
248 }
249
250 static int
251 instance_writepid(struct service_instance *in)
252 {
253 FILE *_pidfile;
254
255 if (!in->pidfile) {
256 return 0;
257 }
258 _pidfile = fopen(in->pidfile, "w");
259 if (_pidfile == NULL) {
260 ERROR("failed to open pidfile for writing: %s: %m", in->pidfile);
261 return 1;
262 }
263 if (fprintf(_pidfile, "%d\n", in->proc.pid) < 0) {
264 ERROR("failed to write pidfile: %s: %m", in->pidfile);
265 fclose(_pidfile);
266 return 2;
267 }
268 if (fclose(_pidfile)) {
269 ERROR("failed to close pidfile: %s: %m", in->pidfile);
270 return 3;
271 }
272
273 return 0;
274 }
275
276 static void
277 instance_run(struct service_instance *in, int _stdout, int _stderr)
278 {
279 struct blobmsg_list_node *var;
280 struct blob_attr *cur;
281 char **argv;
282 char *ld_preload;
283 int argc = 1; /* NULL terminated */
284 int rem, _stdin;
285 bool seccomp = !in->trace && !in->has_jail && in->seccomp;
286 bool setlbf = _stdout >= 0;
287
288 if (in->nice)
289 setpriority(PRIO_PROCESS, 0, in->nice);
290
291 blobmsg_for_each_attr(cur, in->command, rem)
292 argc++;
293
294 blobmsg_list_for_each(&in->env, var)
295 setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1);
296
297 if (seccomp)
298 setenv("SECCOMP_FILE", in->seccomp, 1);
299
300 if (setlbf && asprintf(&ld_preload, "LD_PRELOAD=/lib/libsetlbf.so") > 0)
301 putenv(ld_preload);
302
303 blobmsg_list_for_each(&in->limits, var)
304 instance_limits(blobmsg_name(var->data), blobmsg_data(var->data));
305
306 if (in->trace || seccomp)
307 argc += 1;
308
309 argv = alloca(sizeof(char *) * (argc + in->jail.argc));
310 argc = 0;
311
312 #ifdef SECCOMP_SUPPORT
313 if (in->trace)
314 argv[argc++] = "/sbin/utrace";
315 else if (seccomp)
316 argv[argc++] = "/sbin/seccomp-trace";
317 #else
318 if (in->trace || seccomp)
319 ULOG_WARN("Seccomp support for %s::%s not available\n", in->srv->name, in->name);
320 #endif
321
322 if (in->has_jail)
323 argc = jail_run(in, argv);
324
325 blobmsg_for_each_attr(cur, in->command, rem)
326 argv[argc++] = blobmsg_data(cur);
327
328 argv[argc] = NULL;
329
330 _stdin = open("/dev/null", O_RDONLY);
331
332 if (_stdout == -1)
333 _stdout = open("/dev/null", O_WRONLY);
334
335 if (_stderr == -1)
336 _stderr = open("/dev/null", O_WRONLY);
337
338 if (_stdin > -1) {
339 dup2(_stdin, STDIN_FILENO);
340 closefd(_stdin);
341 }
342 if (_stdout > -1) {
343 dup2(_stdout, STDOUT_FILENO);
344 closefd(_stdout);
345 }
346 if (_stderr > -1) {
347 dup2(_stderr, STDERR_FILENO);
348 closefd(_stderr);
349 }
350
351 if (in->gid && setgid(in->gid)) {
352 ERROR("failed to set group id %d: %m\n", in->gid);
353 exit(127);
354 }
355 if (in->uid && setuid(in->uid)) {
356 ERROR("failed to set user id %d: %m\n", in->uid);
357 exit(127);
358 }
359
360 execvp(argv[0], argv);
361 exit(127);
362 }
363
364 static void
365 instance_free_stdio(struct service_instance *in)
366 {
367 if (in->_stdout.fd.fd > -1) {
368 ustream_free(&in->_stdout.stream);
369 close(in->_stdout.fd.fd);
370 in->_stdout.fd.fd = -1;
371 }
372
373 if (in->_stderr.fd.fd > -1) {
374 ustream_free(&in->_stderr.stream);
375 close(in->_stderr.fd.fd);
376 in->_stderr.fd.fd = -1;
377 }
378 }
379
380 void
381 instance_start(struct service_instance *in)
382 {
383 int pid;
384 int opipe[2] = { -1, -1 };
385 int epipe[2] = { -1, -1 };
386
387 if (!avl_is_empty(&in->errors.avl)) {
388 LOG("Not starting instance %s::%s, an error was indicated\n", in->srv->name, in->name);
389 return;
390 }
391
392 if (!in->command) {
393 LOG("Not starting instance %s::%s, command not set\n", in->srv->name, in->name);
394 return;
395 }
396
397 if (in->proc.pending) {
398 if (in->halt)
399 in->restart = true;
400 return;
401 }
402
403 instance_free_stdio(in);
404 if (in->_stdout.fd.fd > -2) {
405 if (pipe(opipe)) {
406 ULOG_WARN("pipe() failed: %m\n");
407 opipe[0] = opipe[1] = -1;
408 }
409 }
410
411 if (in->_stderr.fd.fd > -2) {
412 if (pipe(epipe)) {
413 ULOG_WARN("pipe() failed: %m\n");
414 epipe[0] = epipe[1] = -1;
415 }
416 }
417
418 in->restart = false;
419 in->halt = false;
420
421 if (!in->valid)
422 return;
423
424 pid = fork();
425 if (pid < 0)
426 return;
427
428 if (!pid) {
429 uloop_done();
430 closefd(opipe[0]);
431 closefd(epipe[0]);
432 instance_run(in, opipe[1], epipe[1]);
433 return;
434 }
435
436 DEBUG(2, "Started instance %s::%s[%d]\n", in->srv->name, in->name, pid);
437 in->proc.pid = pid;
438 instance_writepid(in);
439 clock_gettime(CLOCK_MONOTONIC, &in->start);
440 uloop_process_add(&in->proc);
441
442 if (opipe[0] > -1) {
443 ustream_fd_init(&in->_stdout, opipe[0]);
444 closefd(opipe[1]);
445 fcntl(opipe[0], F_SETFD, FD_CLOEXEC);
446 }
447
448 if (epipe[0] > -1) {
449 ustream_fd_init(&in->_stderr, epipe[0]);
450 closefd(epipe[1]);
451 fcntl(epipe[0], F_SETFD, FD_CLOEXEC);
452 }
453
454 service_event("instance.start", in->srv->name, in->name);
455 }
456
457 static void
458 instance_stdio(struct ustream *s, int prio, struct service_instance *in)
459 {
460 char *newline, *str, *arg0, ident[32];
461 int len;
462
463 arg0 = basename(blobmsg_data(blobmsg_data(in->command)));
464 snprintf(ident, sizeof(ident), "%s[%d]", arg0, in->proc.pid);
465 ulog_open(ULOG_SYSLOG, LOG_DAEMON, ident);
466
467 do {
468 str = ustream_get_read_buf(s, NULL);
469 if (!str)
470 break;
471
472 newline = strchr(str, '\n');
473 if (!newline)
474 break;
475
476 *newline = 0;
477 ulog(prio, "%s\n", str);
478
479 len = newline + 1 - str;
480 ustream_consume(s, len);
481 } while (1);
482
483 ulog_open(ULOG_SYSLOG, LOG_DAEMON, "procd");
484 }
485
486 static void
487 instance_stdout(struct ustream *s, int bytes)
488 {
489 instance_stdio(s, LOG_INFO,
490 container_of(s, struct service_instance, _stdout.stream));
491 }
492
493 static void
494 instance_stderr(struct ustream *s, int bytes)
495 {
496 instance_stdio(s, LOG_ERR,
497 container_of(s, struct service_instance, _stderr.stream));
498 }
499
500 static void
501 instance_timeout(struct uloop_timeout *t)
502 {
503 struct service_instance *in;
504
505 in = container_of(t, struct service_instance, timeout);
506
507 if (in->halt) {
508 LOG("Instance %s::%s pid %d not stopped on SIGTERM, sending SIGKILL instead\n",
509 in->srv->name, in->name, in->proc.pid);
510 kill(in->proc.pid, SIGKILL);
511 } else if (in->restart || in->respawn)
512 instance_start(in);
513 }
514
515 static void
516 instance_exit(struct uloop_process *p, int ret)
517 {
518 struct service_instance *in;
519 struct timespec tp;
520 long runtime;
521
522 in = container_of(p, struct service_instance, proc);
523
524 clock_gettime(CLOCK_MONOTONIC, &tp);
525 runtime = tp.tv_sec - in->start.tv_sec;
526
527 DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in->srv->name, in->name, ret, runtime);
528
529 uloop_timeout_cancel(&in->timeout);
530 service_event("instance.stop", in->srv->name, in->name);
531
532 if (in->halt) {
533 instance_removepid(in);
534 if (in->restart)
535 instance_start(in);
536 else {
537 struct service *s = in->srv;
538
539 avl_delete(&s->instances.avl, &in->node.avl);
540 instance_free(in);
541 service_stopped(s);
542 }
543 } else if (in->restart) {
544 instance_start(in);
545 } else if (in->respawn) {
546 if (runtime < in->respawn_threshold)
547 in->respawn_count++;
548 else
549 in->respawn_count = 0;
550 if (in->respawn_count > in->respawn_retry && in->respawn_retry > 0 ) {
551 LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
552 in->srv->name, in->name, in->respawn_count, runtime);
553 in->restart = in->respawn = 0;
554 in->halt = 1;
555 service_event("instance.fail", in->srv->name, in->name);
556 } else {
557 service_event("instance.respawn", in->srv->name, in->name);
558 uloop_timeout_set(&in->timeout, in->respawn_timeout * 1000);
559 }
560 }
561 }
562
563 void
564 instance_stop(struct service_instance *in, bool halt)
565 {
566 if (!in->proc.pending)
567 return;
568 in->halt = halt;
569 in->restart = in->respawn = false;
570 kill(in->proc.pid, SIGTERM);
571 uloop_timeout_set(&in->timeout, in->term_timeout * 1000);
572 }
573
574 static void
575 instance_restart(struct service_instance *in)
576 {
577 if (!in->proc.pending)
578 return;
579
580 if (in->reload_signal) {
581 kill(in->proc.pid, in->reload_signal);
582 return;
583 }
584
585 in->halt = true;
586 in->restart = true;
587 kill(in->proc.pid, SIGTERM);
588 uloop_timeout_set(&in->timeout, in->term_timeout * 1000);
589 }
590
591 static bool
592 instance_config_changed(struct service_instance *in, struct service_instance *in_new)
593 {
594 if (!in->valid)
595 return true;
596
597 if (!blob_attr_equal(in->command, in_new->command))
598 return true;
599
600 if (!blobmsg_list_equal(&in->env, &in_new->env))
601 return true;
602
603 if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
604 return true;
605
606 if (!blobmsg_list_equal(&in->file, &in_new->file))
607 return true;
608
609 if (in->nice != in_new->nice)
610 return true;
611
612 if (in->uid != in_new->uid)
613 return true;
614
615 if (in->gid != in_new->gid)
616 return true;
617
618 if (in->pidfile && in_new->pidfile)
619 if (strcmp(in->pidfile, in_new->pidfile))
620 return true;
621
622 if (in->pidfile && !in_new->pidfile)
623 return true;
624
625 if (!in->pidfile && in_new->pidfile)
626 return true;
627
628 if (in->respawn_retry != in_new->respawn_retry)
629 return true;
630 if (in->respawn_threshold != in_new->respawn_threshold)
631 return true;
632 if (in->respawn_timeout != in_new->respawn_timeout)
633 return true;
634
635 if (!blobmsg_list_equal(&in->limits, &in_new->limits))
636 return true;
637
638 if (!blobmsg_list_equal(&in->jail.mount, &in_new->jail.mount))
639 return true;
640
641 if (!blobmsg_list_equal(&in->errors, &in_new->errors))
642 return true;
643
644 return false;
645 }
646
647 static bool
648 instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
649 {
650 struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
651 struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
652
653 return n1->ifindex == n2->ifindex;
654 }
655
656 static void
657 instance_netdev_update(struct blobmsg_list_node *l)
658 {
659 struct instance_netdev *n = container_of(l, struct instance_netdev, node);
660
661 n->ifindex = if_nametoindex(n->node.avl.key);
662 }
663
664 static bool
665 instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
666 {
667 struct instance_file *f1 = container_of(l1, struct instance_file, node);
668 struct instance_file *f2 = container_of(l2, struct instance_file, node);
669
670 return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
671 }
672
673 static void
674 instance_file_update(struct blobmsg_list_node *l)
675 {
676 struct instance_file *f = container_of(l, struct instance_file, node);
677 md5_ctx_t md5;
678 char buf[256];
679 int len, fd;
680
681 memset(f->md5, 0, sizeof(f->md5));
682
683 fd = open(l->avl.key, O_RDONLY);
684 if (fd < 0)
685 return;
686
687 md5_begin(&md5);
688 do {
689 len = read(fd, buf, sizeof(buf));
690 if (len < 0) {
691 if (errno == EINTR)
692 continue;
693
694 break;
695 }
696 if (!len)
697 break;
698
699 md5_hash(buf, len, &md5);
700 } while(1);
701
702 md5_end(f->md5, &md5);
703 close(fd);
704 }
705
706 static void
707 instance_fill_any(struct blobmsg_list *l, struct blob_attr *cur)
708 {
709 if (!cur)
710 return;
711
712 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), false);
713 }
714
715 static bool
716 instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
717 {
718 struct blobmsg_list_node *node;
719
720 if (!cur)
721 return true;
722
723 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
724 return false;
725
726 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
727 if (cb) {
728 blobmsg_list_for_each(l, node)
729 cb(node);
730 }
731 return true;
732 }
733
734 static int
735 instance_jail_parse(struct service_instance *in, struct blob_attr *attr)
736 {
737 struct blob_attr *tb[__JAIL_ATTR_MAX];
738 struct jail *jail = &in->jail;
739 struct stat s;
740
741 if (stat("/sbin/ujail", &s))
742 return 0;
743
744 blobmsg_parse(jail_attr, __JAIL_ATTR_MAX, tb,
745 blobmsg_data(attr), blobmsg_data_len(attr));
746
747 jail->argc = 2;
748
749 if (tb[JAIL_ATTR_NAME]) {
750 jail->name = blobmsg_get_string(tb[JAIL_ATTR_NAME]);
751 jail->argc += 2;
752 }
753 if (tb[JAIL_ATTR_HOSTNAME]) {
754 jail->hostname = blobmsg_get_string(tb[JAIL_ATTR_HOSTNAME]);
755 jail->argc += 2;
756 }
757 if (tb[JAIL_ATTR_PROCFS]) {
758 jail->procfs = blobmsg_get_bool(tb[JAIL_ATTR_PROCFS]);
759 jail->argc++;
760 }
761 if (tb[JAIL_ATTR_SYSFS]) {
762 jail->sysfs = blobmsg_get_bool(tb[JAIL_ATTR_SYSFS]);
763 jail->argc++;
764 }
765 if (tb[JAIL_ATTR_UBUS]) {
766 jail->ubus = blobmsg_get_bool(tb[JAIL_ATTR_UBUS]);
767 jail->argc++;
768 }
769 if (tb[JAIL_ATTR_LOG]) {
770 jail->log = blobmsg_get_bool(tb[JAIL_ATTR_LOG]);
771 jail->argc++;
772 }
773 if (tb[JAIL_ATTR_RONLY]) {
774 jail->ronly = blobmsg_get_bool(tb[JAIL_ATTR_RONLY]);
775 jail->argc++;
776 }
777 if (tb[JAIL_ATTR_MOUNT]) {
778 struct blob_attr *cur;
779 int rem;
780
781 blobmsg_for_each_attr(cur, tb[JAIL_ATTR_MOUNT], rem)
782 jail->argc += 2;
783 instance_fill_array(&jail->mount, tb[JAIL_ATTR_MOUNT], NULL, false);
784 }
785 if (in->seccomp)
786 jail->argc += 2;
787
788 return 1;
789 }
790
791 static bool
792 instance_config_parse_command(struct service_instance *in, struct blob_attr **tb)
793 {
794 struct blob_attr *cur, *cur2;
795 bool ret = false;
796 int rem;
797
798 cur = tb[INSTANCE_ATTR_COMMAND];
799 if (!cur) {
800 in->command = NULL;
801 return true;
802 }
803
804 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
805 return false;
806
807 blobmsg_for_each_attr(cur2, cur, rem) {
808 ret = true;
809 break;
810 }
811
812 in->command = cur;
813 return ret;
814 }
815
816 static bool
817 instance_config_parse(struct service_instance *in)
818 {
819 struct blob_attr *tb[__INSTANCE_ATTR_MAX];
820 struct blob_attr *cur, *cur2;
821 int rem;
822
823 blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
824 blobmsg_data(in->config), blobmsg_data_len(in->config));
825
826 if (!instance_config_parse_command(in, tb))
827 return false;
828
829 if (tb[INSTANCE_ATTR_TERMTIMEOUT])
830 in->term_timeout = blobmsg_get_u32(tb[INSTANCE_ATTR_TERMTIMEOUT]);
831 if (tb[INSTANCE_ATTR_RESPAWN]) {
832 int i = 0;
833 uint32_t vals[3] = { 3600, 5, 5};
834
835 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_RESPAWN], rem) {
836 if ((i >= 3) && (blobmsg_type(cur2) == BLOBMSG_TYPE_STRING))
837 continue;
838 vals[i] = atoi(blobmsg_get_string(cur2));
839 i++;
840 }
841 in->respawn = true;
842 in->respawn_count = 0;
843 in->respawn_threshold = vals[0];
844 in->respawn_timeout = vals[1];
845 in->respawn_retry = vals[2];
846 }
847 if (tb[INSTANCE_ATTR_TRIGGER]) {
848 in->trigger = tb[INSTANCE_ATTR_TRIGGER];
849 trigger_add(in->trigger, in);
850 }
851
852 if (tb[INSTANCE_ATTR_WATCH]) {
853 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_WATCH], rem) {
854 if (blobmsg_type(cur2) != BLOBMSG_TYPE_STRING)
855 continue;
856 DEBUG(3, "watch for %s\n", blobmsg_get_string(cur2));
857 watch_add(blobmsg_get_string(cur2), in);
858 }
859 }
860
861 if ((cur = tb[INSTANCE_ATTR_NICE])) {
862 in->nice = (int8_t) blobmsg_get_u32(cur);
863 if (in->nice < -20 || in->nice > 20)
864 return false;
865 }
866
867 if (tb[INSTANCE_ATTR_USER]) {
868 struct passwd *p = getpwnam(blobmsg_get_string(tb[INSTANCE_ATTR_USER]));
869 if (p) {
870 in->uid = p->pw_uid;
871 in->gid = p->pw_gid;
872 }
873 }
874
875 if (tb[INSTANCE_ATTR_TRACE])
876 in->trace = blobmsg_get_bool(tb[INSTANCE_ATTR_TRACE]);
877
878 if (tb[INSTANCE_ATTR_NO_NEW_PRIVS])
879 in->no_new_privs = blobmsg_get_bool(tb[INSTANCE_ATTR_NO_NEW_PRIVS]);
880
881 if (!in->trace && tb[INSTANCE_ATTR_SECCOMP])
882 in->seccomp = blobmsg_get_string(tb[INSTANCE_ATTR_SECCOMP]);
883
884 if (tb[INSTANCE_ATTR_PIDFILE]) {
885 char *pidfile = blobmsg_get_string(tb[INSTANCE_ATTR_PIDFILE]);
886 if (pidfile)
887 in->pidfile = pidfile;
888 }
889
890 if (tb[INSTANCE_ATTR_RELOADSIG])
891 in->reload_signal = blobmsg_get_u32(tb[INSTANCE_ATTR_RELOADSIG]);
892
893 if (!in->trace && tb[INSTANCE_ATTR_JAIL])
894 in->has_jail = instance_jail_parse(in, tb[INSTANCE_ATTR_JAIL]);
895
896 if (tb[INSTANCE_ATTR_STDOUT] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDOUT]))
897 in->_stdout.fd.fd = -1;
898
899 if (tb[INSTANCE_ATTR_STDERR] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDERR]))
900 in->_stderr.fd.fd = -1;
901
902 instance_fill_any(&in->data, tb[INSTANCE_ATTR_DATA]);
903
904 if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
905 return false;
906
907 if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
908 return false;
909
910 if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
911 return false;
912
913 if (!instance_fill_array(&in->limits, tb[INSTANCE_ATTR_LIMITS], NULL, false))
914 return false;
915
916 if (!instance_fill_array(&in->errors, tb[INSTANCE_ATTR_ERROR], NULL, true))
917 return false;
918
919 return true;
920 }
921
922 static void
923 instance_config_cleanup(struct service_instance *in)
924 {
925 blobmsg_list_free(&in->env);
926 blobmsg_list_free(&in->data);
927 blobmsg_list_free(&in->netdev);
928 blobmsg_list_free(&in->file);
929 blobmsg_list_free(&in->limits);
930 blobmsg_list_free(&in->errors);
931 blobmsg_list_free(&in->jail.mount);
932 }
933
934 static void
935 instance_config_move(struct service_instance *in, struct service_instance *in_src)
936 {
937 instance_config_cleanup(in);
938 blobmsg_list_move(&in->env, &in_src->env);
939 blobmsg_list_move(&in->data, &in_src->data);
940 blobmsg_list_move(&in->netdev, &in_src->netdev);
941 blobmsg_list_move(&in->file, &in_src->file);
942 blobmsg_list_move(&in->limits, &in_src->limits);
943 blobmsg_list_move(&in->errors, &in_src->errors);
944 blobmsg_list_move(&in->jail.mount, &in_src->jail.mount);
945 in->trigger = in_src->trigger;
946 in->command = in_src->command;
947 in->pidfile = in_src->pidfile;
948 in->respawn_retry = in_src->respawn_retry;
949 in->respawn_threshold = in_src->respawn_threshold;
950 in->respawn_timeout = in_src->respawn_timeout;
951 in->name = in_src->name;
952 in->trace = in_src->trace;
953 in->node.avl.key = in_src->node.avl.key;
954
955 free(in->config);
956 in->config = in_src->config;
957 in_src->config = NULL;
958 }
959
960 void
961 instance_update(struct service_instance *in, struct service_instance *in_new)
962 {
963 bool changed = instance_config_changed(in, in_new);
964 bool running = in->proc.pending;
965 bool stopping = in->halt;
966
967 if (!running || stopping) {
968 instance_config_move(in, in_new);
969 instance_start(in);
970 } else {
971 if (changed)
972 instance_restart(in);
973 instance_config_move(in, in_new);
974 /* restart happens in the child callback handler */
975 }
976 }
977
978 void
979 instance_free(struct service_instance *in)
980 {
981 instance_free_stdio(in);
982 uloop_process_delete(&in->proc);
983 uloop_timeout_cancel(&in->timeout);
984 trigger_del(in);
985 watch_del(in);
986 instance_config_cleanup(in);
987 free(in->config);
988 free(in);
989 }
990
991 void
992 instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
993 {
994 config = blob_memdup(config);
995 in->srv = s;
996 in->name = blobmsg_name(config);
997 in->config = config;
998 in->timeout.cb = instance_timeout;
999 in->proc.cb = instance_exit;
1000 in->term_timeout = 5;
1001
1002 in->_stdout.fd.fd = -2;
1003 in->_stdout.stream.string_data = true;
1004 in->_stdout.stream.notify_read = instance_stdout;
1005
1006 in->_stderr.fd.fd = -2;
1007 in->_stderr.stream.string_data = true;
1008 in->_stderr.stream.notify_read = instance_stderr;
1009
1010 blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
1011 blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
1012 blobmsg_list_simple_init(&in->env);
1013 blobmsg_list_simple_init(&in->data);
1014 blobmsg_list_simple_init(&in->limits);
1015 blobmsg_list_simple_init(&in->errors);
1016 blobmsg_list_simple_init(&in->jail.mount);
1017 in->valid = instance_config_parse(in);
1018 }
1019
1020 void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
1021 {
1022 void *i;
1023
1024 if (!in->valid)
1025 return;
1026
1027 i = blobmsg_open_table(b, in->name);
1028 blobmsg_add_u8(b, "running", in->proc.pending);
1029 if (in->proc.pending)
1030 blobmsg_add_u32(b, "pid", in->proc.pid);
1031 if (in->command)
1032 blobmsg_add_blob(b, in->command);
1033 blobmsg_add_u32(b, "term_timeout", in->term_timeout);
1034
1035 if (!avl_is_empty(&in->errors.avl)) {
1036 struct blobmsg_list_node *var;
1037 void *e = blobmsg_open_array(b, "errors");
1038 blobmsg_list_for_each(&in->errors, var)
1039 blobmsg_add_string(b, NULL, blobmsg_data(var->data));
1040 blobmsg_close_table(b, e);
1041 }
1042
1043 if (!avl_is_empty(&in->env.avl)) {
1044 struct blobmsg_list_node *var;
1045 void *e = blobmsg_open_table(b, "env");
1046 blobmsg_list_for_each(&in->env, var)
1047 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1048 blobmsg_close_table(b, e);
1049 }
1050
1051 if (!avl_is_empty(&in->data.avl)) {
1052 struct blobmsg_list_node *var;
1053 void *e = blobmsg_open_table(b, "data");
1054 blobmsg_list_for_each(&in->data, var)
1055 blobmsg_add_blob(b, var->data);
1056 blobmsg_close_table(b, e);
1057 }
1058
1059 if (!avl_is_empty(&in->limits.avl)) {
1060 struct blobmsg_list_node *var;
1061 void *e = blobmsg_open_table(b, "limits");
1062 blobmsg_list_for_each(&in->limits, var)
1063 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1064 blobmsg_close_table(b, e);
1065 }
1066
1067 if (in->reload_signal)
1068 blobmsg_add_u32(b, "reload_signal", in->reload_signal);
1069
1070 if (in->respawn) {
1071 void *r = blobmsg_open_table(b, "respawn");
1072 blobmsg_add_u32(b, "threshold", in->respawn_threshold);
1073 blobmsg_add_u32(b, "timeout", in->respawn_timeout);
1074 blobmsg_add_u32(b, "retry", in->respawn_retry);
1075 blobmsg_close_table(b, r);
1076 }
1077
1078 if (in->trace)
1079 blobmsg_add_u8(b, "trace", true);
1080
1081 if (in->no_new_privs)
1082 blobmsg_add_u8(b, "no_new_privs", true);
1083
1084 if (in->seccomp)
1085 blobmsg_add_string(b, "seccomp", in->seccomp);
1086
1087 if (in->pidfile)
1088 blobmsg_add_string(b, "pidfile", in->pidfile);
1089
1090 if (in->has_jail) {
1091 void *r = blobmsg_open_table(b, "jail");
1092 if (in->jail.name)
1093 blobmsg_add_string(b, "name", in->jail.name);
1094 if (in->jail.hostname)
1095 blobmsg_add_string(b, "hostname", in->jail.hostname);
1096 blobmsg_add_u8(b, "procfs", in->jail.procfs);
1097 blobmsg_add_u8(b, "sysfs", in->jail.sysfs);
1098 blobmsg_add_u8(b, "ubus", in->jail.ubus);
1099 blobmsg_add_u8(b, "log", in->jail.log);
1100 blobmsg_add_u8(b, "ronly", in->jail.ronly);
1101 blobmsg_close_table(b, r);
1102 if (!avl_is_empty(&in->jail.mount.avl)) {
1103 struct blobmsg_list_node *var;
1104 void *e = blobmsg_open_table(b, "mount");
1105 blobmsg_list_for_each(&in->jail.mount, var)
1106 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1107 blobmsg_close_table(b, e);
1108 }
1109 }
1110
1111 if (verbose && in->trigger)
1112 blobmsg_add_blob(b, in->trigger);
1113
1114 blobmsg_close_table(b, i);
1115 }