service: Start services normally when seccomp is disabled
[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: %d - %s\n",
245 in->pidfile, errno, strerror(errno));
246 return 1;
247 }
248 return 0;
249 }
250
251 static int
252 instance_writepid(struct service_instance *in)
253 {
254 FILE *_pidfile;
255
256 if (!in->pidfile) {
257 return 0;
258 }
259 _pidfile = fopen(in->pidfile, "w");
260 if (_pidfile == NULL) {
261 ERROR("failed to open pidfile for writing: %s: %d (%s)",
262 in->pidfile, errno, strerror(errno));
263 return 1;
264 }
265 if (fprintf(_pidfile, "%d\n", in->proc.pid) < 0) {
266 ERROR("failed to write pidfile: %s: %d (%s)",
267 in->pidfile, errno, strerror(errno));
268 fclose(_pidfile);
269 return 2;
270 }
271 if (fclose(_pidfile)) {
272 ERROR("failed to close pidfile: %s: %d (%s)",
273 in->pidfile, errno, strerror(errno));
274 return 3;
275 }
276
277 return 0;
278 }
279
280 static void
281 instance_run(struct service_instance *in, int _stdout, int _stderr)
282 {
283 struct blobmsg_list_node *var;
284 struct blob_attr *cur;
285 char **argv;
286 char *ld_preload;
287 int argc = 1; /* NULL terminated */
288 int rem, _stdin;
289 bool seccomp = !in->trace && !in->has_jail && in->seccomp;
290 bool setlbf = _stdout >= 0;
291
292 if (in->nice)
293 setpriority(PRIO_PROCESS, 0, in->nice);
294
295 blobmsg_for_each_attr(cur, in->command, rem)
296 argc++;
297
298 blobmsg_list_for_each(&in->env, var)
299 setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1);
300
301 if (seccomp)
302 setenv("SECCOMP_FILE", in->seccomp, 1);
303
304 if (setlbf && asprintf(&ld_preload, "LD_PRELOAD=/lib/libsetlbf.so") > 0)
305 putenv(ld_preload);
306
307 blobmsg_list_for_each(&in->limits, var)
308 instance_limits(blobmsg_name(var->data), blobmsg_data(var->data));
309
310 if (in->trace || seccomp)
311 argc += 1;
312
313 argv = alloca(sizeof(char *) * (argc + in->jail.argc));
314 argc = 0;
315
316 #ifdef SECCOMP_SUPPORT
317 if (in->trace)
318 argv[argc++] = "/sbin/utrace";
319 else if (seccomp)
320 argv[argc++] = "/sbin/seccomp-trace";
321 #else
322 if (in->trace || seccomp)
323 ULOG_WARN("Seccomp support for %s::%s not available\n", in->srv->name, in->name);
324 #endif
325
326 if (in->has_jail)
327 argc = jail_run(in, argv);
328
329 blobmsg_for_each_attr(cur, in->command, rem)
330 argv[argc++] = blobmsg_data(cur);
331
332 argv[argc] = NULL;
333
334 _stdin = open("/dev/null", O_RDONLY);
335
336 if (_stdout == -1)
337 _stdout = open("/dev/null", O_WRONLY);
338
339 if (_stderr == -1)
340 _stderr = open("/dev/null", O_WRONLY);
341
342 if (_stdin > -1) {
343 dup2(_stdin, STDIN_FILENO);
344 closefd(_stdin);
345 }
346 if (_stdout > -1) {
347 dup2(_stdout, STDOUT_FILENO);
348 closefd(_stdout);
349 }
350 if (_stderr > -1) {
351 dup2(_stderr, STDERR_FILENO);
352 closefd(_stderr);
353 }
354
355 if (in->gid && setgid(in->gid)) {
356 ERROR("failed to set group id %d: %d (%s)\n", in->gid, errno, strerror(errno));
357 exit(127);
358 }
359 if (in->uid && setuid(in->uid)) {
360 ERROR("failed to set user id %d: %d (%s)\n", in->uid, errno, strerror(errno));
361 exit(127);
362 }
363
364 execvp(argv[0], argv);
365 exit(127);
366 }
367
368 static void
369 instance_free_stdio(struct service_instance *in)
370 {
371 if (in->_stdout.fd.fd > -1) {
372 ustream_free(&in->_stdout.stream);
373 close(in->_stdout.fd.fd);
374 in->_stdout.fd.fd = -1;
375 }
376
377 if (in->_stderr.fd.fd > -1) {
378 ustream_free(&in->_stderr.stream);
379 close(in->_stderr.fd.fd);
380 in->_stderr.fd.fd = -1;
381 }
382 }
383
384 void
385 instance_start(struct service_instance *in)
386 {
387 int pid;
388 int opipe[2] = { -1, -1 };
389 int epipe[2] = { -1, -1 };
390
391 if (!avl_is_empty(&in->errors.avl)) {
392 LOG("Not starting instance %s::%s, an error was indicated\n", in->srv->name, in->name);
393 return;
394 }
395
396 if (!in->command) {
397 LOG("Not starting instance %s::%s, command not set\n", in->srv->name, in->name);
398 return;
399 }
400
401 if (in->proc.pending) {
402 if (in->halt)
403 in->restart = true;
404 return;
405 }
406
407 instance_free_stdio(in);
408 if (in->_stdout.fd.fd > -2) {
409 if (pipe(opipe)) {
410 ULOG_WARN("pipe() failed: %d (%s)\n", errno, strerror(errno));
411 opipe[0] = opipe[1] = -1;
412 }
413 }
414
415 if (in->_stderr.fd.fd > -2) {
416 if (pipe(epipe)) {
417 ULOG_WARN("pipe() failed: %d (%s)\n", errno, strerror(errno));
418 epipe[0] = epipe[1] = -1;
419 }
420 }
421
422 in->restart = false;
423 in->halt = false;
424
425 if (!in->valid)
426 return;
427
428 pid = fork();
429 if (pid < 0)
430 return;
431
432 if (!pid) {
433 uloop_done();
434 closefd(opipe[0]);
435 closefd(epipe[0]);
436 instance_run(in, opipe[1], epipe[1]);
437 return;
438 }
439
440 DEBUG(2, "Started instance %s::%s[%d]\n", in->srv->name, in->name, pid);
441 in->proc.pid = pid;
442 instance_writepid(in);
443 clock_gettime(CLOCK_MONOTONIC, &in->start);
444 uloop_process_add(&in->proc);
445
446 if (opipe[0] > -1) {
447 ustream_fd_init(&in->_stdout, opipe[0]);
448 closefd(opipe[1]);
449 fcntl(opipe[0], F_SETFD, FD_CLOEXEC);
450 }
451
452 if (epipe[0] > -1) {
453 ustream_fd_init(&in->_stderr, epipe[0]);
454 closefd(epipe[1]);
455 fcntl(epipe[0], F_SETFD, FD_CLOEXEC);
456 }
457
458 service_event("instance.start", in->srv->name, in->name);
459 }
460
461 static void
462 instance_stdio(struct ustream *s, int prio, struct service_instance *in)
463 {
464 char *newline, *str, *arg0, ident[32];
465 int len;
466
467 arg0 = basename(blobmsg_data(blobmsg_data(in->command)));
468 snprintf(ident, sizeof(ident), "%s[%d]", arg0, in->proc.pid);
469 ulog_open(ULOG_SYSLOG, LOG_DAEMON, ident);
470
471 do {
472 str = ustream_get_read_buf(s, NULL);
473 if (!str)
474 break;
475
476 newline = strchr(str, '\n');
477 if (!newline)
478 break;
479
480 *newline = 0;
481 ulog(prio, "%s\n", str);
482
483 len = newline + 1 - str;
484 ustream_consume(s, len);
485 } while (1);
486
487 ulog_open(ULOG_SYSLOG, LOG_DAEMON, "procd");
488 }
489
490 static void
491 instance_stdout(struct ustream *s, int bytes)
492 {
493 instance_stdio(s, LOG_INFO,
494 container_of(s, struct service_instance, _stdout.stream));
495 }
496
497 static void
498 instance_stderr(struct ustream *s, int bytes)
499 {
500 instance_stdio(s, LOG_ERR,
501 container_of(s, struct service_instance, _stderr.stream));
502 }
503
504 static void
505 instance_timeout(struct uloop_timeout *t)
506 {
507 struct service_instance *in;
508
509 in = container_of(t, struct service_instance, timeout);
510
511 if (in->halt) {
512 LOG("Instance %s::%s pid %d not stopped on SIGTERM, sending SIGKILL instead\n",
513 in->srv->name, in->name, in->proc.pid);
514 kill(in->proc.pid, SIGKILL);
515 } else if (in->restart || in->respawn)
516 instance_start(in);
517 }
518
519 static void
520 instance_exit(struct uloop_process *p, int ret)
521 {
522 struct service_instance *in;
523 struct timespec tp;
524 long runtime;
525
526 in = container_of(p, struct service_instance, proc);
527
528 clock_gettime(CLOCK_MONOTONIC, &tp);
529 runtime = tp.tv_sec - in->start.tv_sec;
530
531 DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in->srv->name, in->name, ret, runtime);
532
533 uloop_timeout_cancel(&in->timeout);
534 service_event("instance.stop", in->srv->name, in->name);
535
536 if (in->halt) {
537 instance_removepid(in);
538 if (in->restart)
539 instance_start(in);
540 else {
541 struct service *s = in->srv;
542
543 avl_delete(&s->instances.avl, &in->node.avl);
544 instance_free(in);
545 service_stopped(s);
546 }
547 } else if (in->restart) {
548 instance_start(in);
549 } else if (in->respawn) {
550 if (runtime < in->respawn_threshold)
551 in->respawn_count++;
552 else
553 in->respawn_count = 0;
554 if (in->respawn_count > in->respawn_retry && in->respawn_retry > 0 ) {
555 LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
556 in->srv->name, in->name, in->respawn_count, runtime);
557 in->restart = in->respawn = 0;
558 in->halt = 1;
559 service_event("instance.fail", in->srv->name, in->name);
560 } else {
561 service_event("instance.respawn", in->srv->name, in->name);
562 uloop_timeout_set(&in->timeout, in->respawn_timeout * 1000);
563 }
564 }
565 }
566
567 void
568 instance_stop(struct service_instance *in, bool halt)
569 {
570 if (!in->proc.pending)
571 return;
572 in->halt = halt;
573 in->restart = in->respawn = false;
574 kill(in->proc.pid, SIGTERM);
575 uloop_timeout_set(&in->timeout, in->term_timeout * 1000);
576 }
577
578 static void
579 instance_restart(struct service_instance *in)
580 {
581 if (!in->proc.pending)
582 return;
583
584 if (in->reload_signal) {
585 kill(in->proc.pid, in->reload_signal);
586 return;
587 }
588
589 in->halt = true;
590 in->restart = true;
591 kill(in->proc.pid, SIGTERM);
592 uloop_timeout_set(&in->timeout, in->term_timeout * 1000);
593 }
594
595 static bool
596 instance_config_changed(struct service_instance *in, struct service_instance *in_new)
597 {
598 if (!in->valid)
599 return true;
600
601 if (!blob_attr_equal(in->command, in_new->command))
602 return true;
603
604 if (!blobmsg_list_equal(&in->env, &in_new->env))
605 return true;
606
607 if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
608 return true;
609
610 if (!blobmsg_list_equal(&in->file, &in_new->file))
611 return true;
612
613 if (in->nice != in_new->nice)
614 return true;
615
616 if (in->uid != in_new->uid)
617 return true;
618
619 if (in->gid != in_new->gid)
620 return true;
621
622 if (in->pidfile && in_new->pidfile)
623 if (strcmp(in->pidfile, in_new->pidfile))
624 return true;
625
626 if (in->pidfile && !in_new->pidfile)
627 return true;
628
629 if (!in->pidfile && in_new->pidfile)
630 return true;
631
632 if (in->respawn_retry != in_new->respawn_retry)
633 return true;
634 if (in->respawn_threshold != in_new->respawn_threshold)
635 return true;
636 if (in->respawn_timeout != in_new->respawn_timeout)
637 return true;
638
639 if (!blobmsg_list_equal(&in->limits, &in_new->limits))
640 return true;
641
642 if (!blobmsg_list_equal(&in->jail.mount, &in_new->jail.mount))
643 return true;
644
645 if (!blobmsg_list_equal(&in->errors, &in_new->errors))
646 return true;
647
648 return false;
649 }
650
651 static bool
652 instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
653 {
654 struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
655 struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
656
657 return n1->ifindex == n2->ifindex;
658 }
659
660 static void
661 instance_netdev_update(struct blobmsg_list_node *l)
662 {
663 struct instance_netdev *n = container_of(l, struct instance_netdev, node);
664
665 n->ifindex = if_nametoindex(n->node.avl.key);
666 }
667
668 static bool
669 instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
670 {
671 struct instance_file *f1 = container_of(l1, struct instance_file, node);
672 struct instance_file *f2 = container_of(l2, struct instance_file, node);
673
674 return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
675 }
676
677 static void
678 instance_file_update(struct blobmsg_list_node *l)
679 {
680 struct instance_file *f = container_of(l, struct instance_file, node);
681 md5_ctx_t md5;
682 char buf[256];
683 int len, fd;
684
685 memset(f->md5, 0, sizeof(f->md5));
686
687 fd = open(l->avl.key, O_RDONLY);
688 if (fd < 0)
689 return;
690
691 md5_begin(&md5);
692 do {
693 len = read(fd, buf, sizeof(buf));
694 if (len < 0) {
695 if (errno == EINTR)
696 continue;
697
698 break;
699 }
700 if (!len)
701 break;
702
703 md5_hash(buf, len, &md5);
704 } while(1);
705
706 md5_end(f->md5, &md5);
707 close(fd);
708 }
709
710 static void
711 instance_fill_any(struct blobmsg_list *l, struct blob_attr *cur)
712 {
713 if (!cur)
714 return;
715
716 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), false);
717 }
718
719 static bool
720 instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
721 {
722 struct blobmsg_list_node *node;
723
724 if (!cur)
725 return true;
726
727 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
728 return false;
729
730 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
731 if (cb) {
732 blobmsg_list_for_each(l, node)
733 cb(node);
734 }
735 return true;
736 }
737
738 static int
739 instance_jail_parse(struct service_instance *in, struct blob_attr *attr)
740 {
741 struct blob_attr *tb[__JAIL_ATTR_MAX];
742 struct jail *jail = &in->jail;
743 struct stat s;
744
745 if (stat("/sbin/ujail", &s))
746 return 0;
747
748 blobmsg_parse(jail_attr, __JAIL_ATTR_MAX, tb,
749 blobmsg_data(attr), blobmsg_data_len(attr));
750
751 jail->argc = 2;
752
753 if (tb[JAIL_ATTR_NAME]) {
754 jail->name = blobmsg_get_string(tb[JAIL_ATTR_NAME]);
755 jail->argc += 2;
756 }
757 if (tb[JAIL_ATTR_HOSTNAME]) {
758 jail->hostname = blobmsg_get_string(tb[JAIL_ATTR_HOSTNAME]);
759 jail->argc += 2;
760 }
761 if (tb[JAIL_ATTR_PROCFS]) {
762 jail->procfs = blobmsg_get_bool(tb[JAIL_ATTR_PROCFS]);
763 jail->argc++;
764 }
765 if (tb[JAIL_ATTR_SYSFS]) {
766 jail->sysfs = blobmsg_get_bool(tb[JAIL_ATTR_SYSFS]);
767 jail->argc++;
768 }
769 if (tb[JAIL_ATTR_UBUS]) {
770 jail->ubus = blobmsg_get_bool(tb[JAIL_ATTR_UBUS]);
771 jail->argc++;
772 }
773 if (tb[JAIL_ATTR_LOG]) {
774 jail->log = blobmsg_get_bool(tb[JAIL_ATTR_LOG]);
775 jail->argc++;
776 }
777 if (tb[JAIL_ATTR_RONLY]) {
778 jail->ronly = blobmsg_get_bool(tb[JAIL_ATTR_RONLY]);
779 jail->argc++;
780 }
781 if (tb[JAIL_ATTR_MOUNT]) {
782 struct blob_attr *cur;
783 int rem;
784
785 blobmsg_for_each_attr(cur, tb[JAIL_ATTR_MOUNT], rem)
786 jail->argc += 2;
787 instance_fill_array(&jail->mount, tb[JAIL_ATTR_MOUNT], NULL, false);
788 }
789 if (in->seccomp)
790 jail->argc += 2;
791
792 return 1;
793 }
794
795 static bool
796 instance_config_parse_command(struct service_instance *in, struct blob_attr **tb)
797 {
798 struct blob_attr *cur, *cur2;
799 bool ret = false;
800 int rem;
801
802 cur = tb[INSTANCE_ATTR_COMMAND];
803 if (!cur) {
804 in->command = NULL;
805 return true;
806 }
807
808 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
809 return false;
810
811 blobmsg_for_each_attr(cur2, cur, rem) {
812 ret = true;
813 break;
814 }
815
816 in->command = cur;
817 return ret;
818 }
819
820 static bool
821 instance_config_parse(struct service_instance *in)
822 {
823 struct blob_attr *tb[__INSTANCE_ATTR_MAX];
824 struct blob_attr *cur, *cur2;
825 int rem;
826
827 blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
828 blobmsg_data(in->config), blobmsg_data_len(in->config));
829
830 if (!instance_config_parse_command(in, tb))
831 return false;
832
833 if (tb[INSTANCE_ATTR_TERMTIMEOUT])
834 in->term_timeout = blobmsg_get_u32(tb[INSTANCE_ATTR_TERMTIMEOUT]);
835 if (tb[INSTANCE_ATTR_RESPAWN]) {
836 int i = 0;
837 uint32_t vals[3] = { 3600, 5, 5};
838
839 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_RESPAWN], rem) {
840 if ((i >= 3) && (blobmsg_type(cur2) == BLOBMSG_TYPE_STRING))
841 continue;
842 vals[i] = atoi(blobmsg_get_string(cur2));
843 i++;
844 }
845 in->respawn = true;
846 in->respawn_count = 0;
847 in->respawn_threshold = vals[0];
848 in->respawn_timeout = vals[1];
849 in->respawn_retry = vals[2];
850 }
851 if (tb[INSTANCE_ATTR_TRIGGER]) {
852 in->trigger = tb[INSTANCE_ATTR_TRIGGER];
853 trigger_add(in->trigger, in);
854 }
855
856 if (tb[INSTANCE_ATTR_WATCH]) {
857 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_WATCH], rem) {
858 if (blobmsg_type(cur2) != BLOBMSG_TYPE_STRING)
859 continue;
860 DEBUG(3, "watch for %s\n", blobmsg_get_string(cur2));
861 watch_add(blobmsg_get_string(cur2), in);
862 }
863 }
864
865 if ((cur = tb[INSTANCE_ATTR_NICE])) {
866 in->nice = (int8_t) blobmsg_get_u32(cur);
867 if (in->nice < -20 || in->nice > 20)
868 return false;
869 }
870
871 if (tb[INSTANCE_ATTR_USER]) {
872 struct passwd *p = getpwnam(blobmsg_get_string(tb[INSTANCE_ATTR_USER]));
873 if (p) {
874 in->uid = p->pw_uid;
875 in->gid = p->pw_gid;
876 }
877 }
878
879 if (tb[INSTANCE_ATTR_TRACE])
880 in->trace = blobmsg_get_bool(tb[INSTANCE_ATTR_TRACE]);
881
882 if (tb[INSTANCE_ATTR_NO_NEW_PRIVS])
883 in->no_new_privs = blobmsg_get_bool(tb[INSTANCE_ATTR_NO_NEW_PRIVS]);
884
885 if (!in->trace && tb[INSTANCE_ATTR_SECCOMP])
886 in->seccomp = blobmsg_get_string(tb[INSTANCE_ATTR_SECCOMP]);
887
888 if (tb[INSTANCE_ATTR_PIDFILE]) {
889 char *pidfile = blobmsg_get_string(tb[INSTANCE_ATTR_PIDFILE]);
890 if (pidfile)
891 in->pidfile = pidfile;
892 }
893
894 if (tb[INSTANCE_ATTR_RELOADSIG])
895 in->reload_signal = blobmsg_get_u32(tb[INSTANCE_ATTR_RELOADSIG]);
896
897 if (!in->trace && tb[INSTANCE_ATTR_JAIL])
898 in->has_jail = instance_jail_parse(in, tb[INSTANCE_ATTR_JAIL]);
899
900 if (tb[INSTANCE_ATTR_STDOUT] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDOUT]))
901 in->_stdout.fd.fd = -1;
902
903 if (tb[INSTANCE_ATTR_STDERR] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDERR]))
904 in->_stderr.fd.fd = -1;
905
906 instance_fill_any(&in->data, tb[INSTANCE_ATTR_DATA]);
907
908 if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
909 return false;
910
911 if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
912 return false;
913
914 if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
915 return false;
916
917 if (!instance_fill_array(&in->limits, tb[INSTANCE_ATTR_LIMITS], NULL, false))
918 return false;
919
920 if (!instance_fill_array(&in->errors, tb[INSTANCE_ATTR_ERROR], NULL, true))
921 return false;
922
923 return true;
924 }
925
926 static void
927 instance_config_cleanup(struct service_instance *in)
928 {
929 blobmsg_list_free(&in->env);
930 blobmsg_list_free(&in->data);
931 blobmsg_list_free(&in->netdev);
932 blobmsg_list_free(&in->file);
933 blobmsg_list_free(&in->limits);
934 blobmsg_list_free(&in->errors);
935 blobmsg_list_free(&in->jail.mount);
936 }
937
938 static void
939 instance_config_move(struct service_instance *in, struct service_instance *in_src)
940 {
941 instance_config_cleanup(in);
942 blobmsg_list_move(&in->env, &in_src->env);
943 blobmsg_list_move(&in->data, &in_src->data);
944 blobmsg_list_move(&in->netdev, &in_src->netdev);
945 blobmsg_list_move(&in->file, &in_src->file);
946 blobmsg_list_move(&in->limits, &in_src->limits);
947 blobmsg_list_move(&in->errors, &in_src->errors);
948 blobmsg_list_move(&in->jail.mount, &in_src->jail.mount);
949 in->trigger = in_src->trigger;
950 in->command = in_src->command;
951 in->pidfile = in_src->pidfile;
952 in->respawn_retry = in_src->respawn_retry;
953 in->respawn_threshold = in_src->respawn_threshold;
954 in->respawn_timeout = in_src->respawn_timeout;
955 in->name = in_src->name;
956 in->trace = in_src->trace;
957 in->node.avl.key = in_src->node.avl.key;
958
959 free(in->config);
960 in->config = in_src->config;
961 in_src->config = NULL;
962 }
963
964 void
965 instance_update(struct service_instance *in, struct service_instance *in_new)
966 {
967 bool changed = instance_config_changed(in, in_new);
968 bool running = in->proc.pending;
969 bool stopping = in->halt;
970
971 if (!running || stopping) {
972 instance_config_move(in, in_new);
973 instance_start(in);
974 } else {
975 if (changed)
976 instance_restart(in);
977 instance_config_move(in, in_new);
978 /* restart happens in the child callback handler */
979 }
980 }
981
982 void
983 instance_free(struct service_instance *in)
984 {
985 instance_free_stdio(in);
986 uloop_process_delete(&in->proc);
987 uloop_timeout_cancel(&in->timeout);
988 trigger_del(in);
989 watch_del(in);
990 instance_config_cleanup(in);
991 free(in->config);
992 free(in);
993 }
994
995 void
996 instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
997 {
998 config = blob_memdup(config);
999 in->srv = s;
1000 in->name = blobmsg_name(config);
1001 in->config = config;
1002 in->timeout.cb = instance_timeout;
1003 in->proc.cb = instance_exit;
1004 in->term_timeout = 5;
1005
1006 in->_stdout.fd.fd = -2;
1007 in->_stdout.stream.string_data = true;
1008 in->_stdout.stream.notify_read = instance_stdout;
1009
1010 in->_stderr.fd.fd = -2;
1011 in->_stderr.stream.string_data = true;
1012 in->_stderr.stream.notify_read = instance_stderr;
1013
1014 blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
1015 blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
1016 blobmsg_list_simple_init(&in->env);
1017 blobmsg_list_simple_init(&in->data);
1018 blobmsg_list_simple_init(&in->limits);
1019 blobmsg_list_simple_init(&in->errors);
1020 blobmsg_list_simple_init(&in->jail.mount);
1021 in->valid = instance_config_parse(in);
1022 }
1023
1024 void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
1025 {
1026 void *i;
1027
1028 if (!in->valid)
1029 return;
1030
1031 i = blobmsg_open_table(b, in->name);
1032 blobmsg_add_u8(b, "running", in->proc.pending);
1033 if (in->proc.pending)
1034 blobmsg_add_u32(b, "pid", in->proc.pid);
1035 if (in->command)
1036 blobmsg_add_blob(b, in->command);
1037 blobmsg_add_u32(b, "term_timeout", in->term_timeout);
1038
1039 if (!avl_is_empty(&in->errors.avl)) {
1040 struct blobmsg_list_node *var;
1041 void *e = blobmsg_open_array(b, "errors");
1042 blobmsg_list_for_each(&in->errors, var)
1043 blobmsg_add_string(b, NULL, blobmsg_data(var->data));
1044 blobmsg_close_table(b, e);
1045 }
1046
1047 if (!avl_is_empty(&in->env.avl)) {
1048 struct blobmsg_list_node *var;
1049 void *e = blobmsg_open_table(b, "env");
1050 blobmsg_list_for_each(&in->env, var)
1051 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1052 blobmsg_close_table(b, e);
1053 }
1054
1055 if (!avl_is_empty(&in->data.avl)) {
1056 struct blobmsg_list_node *var;
1057 void *e = blobmsg_open_table(b, "data");
1058 blobmsg_list_for_each(&in->data, var)
1059 blobmsg_add_blob(b, var->data);
1060 blobmsg_close_table(b, e);
1061 }
1062
1063 if (!avl_is_empty(&in->limits.avl)) {
1064 struct blobmsg_list_node *var;
1065 void *e = blobmsg_open_table(b, "limits");
1066 blobmsg_list_for_each(&in->limits, var)
1067 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1068 blobmsg_close_table(b, e);
1069 }
1070
1071 if (in->reload_signal)
1072 blobmsg_add_u32(b, "reload_signal", in->reload_signal);
1073
1074 if (in->respawn) {
1075 void *r = blobmsg_open_table(b, "respawn");
1076 blobmsg_add_u32(b, "threshold", in->respawn_threshold);
1077 blobmsg_add_u32(b, "timeout", in->respawn_timeout);
1078 blobmsg_add_u32(b, "retry", in->respawn_retry);
1079 blobmsg_close_table(b, r);
1080 }
1081
1082 if (in->trace)
1083 blobmsg_add_u8(b, "trace", true);
1084
1085 if (in->no_new_privs)
1086 blobmsg_add_u8(b, "no_new_privs", true);
1087
1088 if (in->seccomp)
1089 blobmsg_add_string(b, "seccomp", in->seccomp);
1090
1091 if (in->pidfile)
1092 blobmsg_add_string(b, "pidfile", in->pidfile);
1093
1094 if (in->has_jail) {
1095 void *r = blobmsg_open_table(b, "jail");
1096 if (in->jail.name)
1097 blobmsg_add_string(b, "name", in->jail.name);
1098 if (in->jail.hostname)
1099 blobmsg_add_string(b, "hostname", in->jail.hostname);
1100 blobmsg_add_u8(b, "procfs", in->jail.procfs);
1101 blobmsg_add_u8(b, "sysfs", in->jail.sysfs);
1102 blobmsg_add_u8(b, "ubus", in->jail.ubus);
1103 blobmsg_add_u8(b, "log", in->jail.log);
1104 blobmsg_add_u8(b, "ronly", in->jail.ronly);
1105 blobmsg_close_table(b, r);
1106 if (!avl_is_empty(&in->jail.mount.avl)) {
1107 struct blobmsg_list_node *var;
1108 void *e = blobmsg_open_table(b, "mount");
1109 blobmsg_list_for_each(&in->jail.mount, var)
1110 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1111 blobmsg_close_table(b, e);
1112 }
1113 }
1114
1115 if (verbose && in->trigger)
1116 blobmsg_add_blob(b, in->trigger);
1117
1118 blobmsg_close_table(b, i);
1119 }