projects / project / procd.git / blob
? search:


8202d65129a151fc47c6aacdfa268fdd3c7ccbf0
[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 <grp.h>
21 #include <net/if.h>
22 #include <unistd.h>
23 #include <stdint.h>
24 #include <stdio.h>
25 #include <fcntl.h>
26 #include <pwd.h>
27 #include <libgen.h>
28 #include <unistd.h>
29 #define SYSLOG_NAMES
30 #include <syslog.h>
31
32 #include <libubox/md5.h>
33
34 #include "../procd.h"
35
36 #include "service.h"
37 #include "instance.h"
38
39 #define UJAIL_BIN_PATH "/sbin/ujail"
40 #define CGROUP_BASEDIR "/sys/fs/cgroup/services"
41
42 enum {
43 INSTANCE_ATTR_COMMAND,
44 INSTANCE_ATTR_ENV,
45 INSTANCE_ATTR_DATA,
46 INSTANCE_ATTR_NETDEV,
47 INSTANCE_ATTR_FILE,
48 INSTANCE_ATTR_TRIGGER,
49 INSTANCE_ATTR_RESPAWN,
50 INSTANCE_ATTR_NICE,
51 INSTANCE_ATTR_LIMITS,
52 INSTANCE_ATTR_WATCH,
53 INSTANCE_ATTR_ERROR,
54 INSTANCE_ATTR_USER,
55 INSTANCE_ATTR_GROUP,
56 INSTANCE_ATTR_STDOUT,
57 INSTANCE_ATTR_STDERR,
58 INSTANCE_ATTR_NO_NEW_PRIVS,
59 INSTANCE_ATTR_JAIL,
60 INSTANCE_ATTR_TRACE,
61 INSTANCE_ATTR_SECCOMP,
62 INSTANCE_ATTR_CAPABILITIES,
63 INSTANCE_ATTR_PIDFILE,
64 INSTANCE_ATTR_RELOADSIG,
65 INSTANCE_ATTR_TERMTIMEOUT,
66 INSTANCE_ATTR_FACILITY,
67 INSTANCE_ATTR_EXTROOT,
68 INSTANCE_ATTR_OVERLAYDIR,
69 INSTANCE_ATTR_TMPOVERLAYSIZE,
70 INSTANCE_ATTR_BUNDLE,
71 INSTANCE_ATTR_WATCHDOG,
72 __INSTANCE_ATTR_MAX
73 };
74
75 static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = {
76 [INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY },
77 [INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
78 [INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
79 [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
80 [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY },
81 [INSTANCE_ATTR_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
82 [INSTANCE_ATTR_RESPAWN] = { "respawn", BLOBMSG_TYPE_ARRAY },
83 [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
84 [INSTANCE_ATTR_LIMITS] = { "limits", BLOBMSG_TYPE_TABLE },
85 [INSTANCE_ATTR_WATCH] = { "watch", BLOBMSG_TYPE_ARRAY },
86 [INSTANCE_ATTR_ERROR] = { "error", BLOBMSG_TYPE_ARRAY },
87 [INSTANCE_ATTR_USER] = { "user", BLOBMSG_TYPE_STRING },
88 [INSTANCE_ATTR_GROUP] = { "group", BLOBMSG_TYPE_STRING },
89 [INSTANCE_ATTR_STDOUT] = { "stdout", BLOBMSG_TYPE_BOOL },
90 [INSTANCE_ATTR_STDERR] = { "stderr", BLOBMSG_TYPE_BOOL },
91 [INSTANCE_ATTR_NO_NEW_PRIVS] = { "no_new_privs", BLOBMSG_TYPE_BOOL },
92 [INSTANCE_ATTR_JAIL] = { "jail", BLOBMSG_TYPE_TABLE },
93 [INSTANCE_ATTR_TRACE] = { "trace", BLOBMSG_TYPE_BOOL },
94 [INSTANCE_ATTR_SECCOMP] = { "seccomp", BLOBMSG_TYPE_STRING },
95 [INSTANCE_ATTR_CAPABILITIES] = { "capabilities", BLOBMSG_TYPE_STRING },
96 [INSTANCE_ATTR_PIDFILE] = { "pidfile", BLOBMSG_TYPE_STRING },
97 [INSTANCE_ATTR_RELOADSIG] = { "reload_signal", BLOBMSG_TYPE_INT32 },
98 [INSTANCE_ATTR_TERMTIMEOUT] = { "term_timeout", BLOBMSG_TYPE_INT32 },
99 [INSTANCE_ATTR_FACILITY] = { "facility", BLOBMSG_TYPE_STRING },
100 [INSTANCE_ATTR_EXTROOT] = { "extroot", BLOBMSG_TYPE_STRING },
101 [INSTANCE_ATTR_OVERLAYDIR] = { "overlaydir", BLOBMSG_TYPE_STRING },
102 [INSTANCE_ATTR_TMPOVERLAYSIZE] = { "tmpoverlaysize", BLOBMSG_TYPE_STRING },
103 [INSTANCE_ATTR_BUNDLE] = { "bundle", BLOBMSG_TYPE_STRING },
104 [INSTANCE_ATTR_WATCHDOG] = { "watchdog", BLOBMSG_TYPE_ARRAY },
105 };
106
107 enum {
108 JAIL_ATTR_NAME,
109 JAIL_ATTR_HOSTNAME,
110 JAIL_ATTR_PROCFS,
111 JAIL_ATTR_SYSFS,
112 JAIL_ATTR_UBUS,
113 JAIL_ATTR_LOG,
114 JAIL_ATTR_RONLY,
115 JAIL_ATTR_MOUNT,
116 JAIL_ATTR_NETNS,
117 JAIL_ATTR_USERNS,
118 JAIL_ATTR_CGROUPSNS,
119 JAIL_ATTR_CONSOLE,
120 JAIL_ATTR_REQUIREJAIL,
121 JAIL_ATTR_IMMEDIATELY,
122 JAIL_ATTR_PIDFILE,
123 JAIL_ATTR_SETNS,
124 __JAIL_ATTR_MAX,
125 };
126
127 static const struct blobmsg_policy jail_attr[__JAIL_ATTR_MAX] = {
128 [JAIL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
129 [JAIL_ATTR_HOSTNAME] = { "hostname", BLOBMSG_TYPE_STRING },
130 [JAIL_ATTR_PROCFS] = { "procfs", BLOBMSG_TYPE_BOOL },
131 [JAIL_ATTR_SYSFS] = { "sysfs", BLOBMSG_TYPE_BOOL },
132 [JAIL_ATTR_UBUS] = { "ubus", BLOBMSG_TYPE_BOOL },
133 [JAIL_ATTR_LOG] = { "log", BLOBMSG_TYPE_BOOL },
134 [JAIL_ATTR_RONLY] = { "ronly", BLOBMSG_TYPE_BOOL },
135 [JAIL_ATTR_MOUNT] = { "mount", BLOBMSG_TYPE_TABLE },
136 [JAIL_ATTR_NETNS] = { "netns", BLOBMSG_TYPE_BOOL },
137 [JAIL_ATTR_USERNS] = { "userns", BLOBMSG_TYPE_BOOL },
138 [JAIL_ATTR_CGROUPSNS] = { "cgroupsns", BLOBMSG_TYPE_BOOL },
139 [JAIL_ATTR_CONSOLE] = { "console", BLOBMSG_TYPE_BOOL },
140 [JAIL_ATTR_REQUIREJAIL] = { "requirejail", BLOBMSG_TYPE_BOOL },
141 [JAIL_ATTR_IMMEDIATELY] = { "immediately", BLOBMSG_TYPE_BOOL },
142 [JAIL_ATTR_PIDFILE] = { "pidfile", BLOBMSG_TYPE_STRING },
143 [JAIL_ATTR_SETNS] = { "setns", BLOBMSG_TYPE_ARRAY },
144 };
145
146 enum {
147 JAIL_SETNS_ATTR_PID,
148 JAIL_SETNS_ATTR_NS,
149 __JAIL_SETNS_ATTR_MAX,
150 };
151
152 static const struct blobmsg_policy jail_setns_attr[__JAIL_SETNS_ATTR_MAX] = {
153 [JAIL_SETNS_ATTR_PID] = { "pid", BLOBMSG_TYPE_INT32 },
154 [JAIL_SETNS_ATTR_NS] = { "namespaces", BLOBMSG_TYPE_ARRAY },
155 };
156
157 struct instance_netdev {
158 struct blobmsg_list_node node;
159 int ifindex;
160 };
161
162 struct instance_file {
163 struct blobmsg_list_node node;
164 uint32_t md5[4];
165 };
166
167 struct rlimit_name {
168 const char *name;
169 int resource;
170 };
171
172 static const struct rlimit_name rlimit_names[] = {
173 { "as", RLIMIT_AS },
174 { "core", RLIMIT_CORE },
175 { "cpu", RLIMIT_CPU },
176 { "data", RLIMIT_DATA },
177 { "fsize", RLIMIT_FSIZE },
178 { "memlock", RLIMIT_MEMLOCK },
179 { "nofile", RLIMIT_NOFILE },
180 { "nproc", RLIMIT_NPROC },
181 { "rss", RLIMIT_RSS },
182 { "stack", RLIMIT_STACK },
183 #ifdef linux
184 { "nice", RLIMIT_NICE },
185 { "rtprio", RLIMIT_RTPRIO },
186 { "msgqueue", RLIMIT_MSGQUEUE },
187 { "sigpending", RLIMIT_SIGPENDING },
188 #endif
189 { NULL, 0 }
190 };
191
192 static void closefd(int fd)
193 {
194 if (fd > STDERR_FILENO)
195 close(fd);
196 }
197
198 /* convert a string into numeric syslog facility or return -1 if no match found */
199 static int
200 syslog_facility_str_to_int(const char *facility)
201 {
202 CODE *p = facilitynames;
203
204 while (p->c_name && strcasecmp(p->c_name, facility))
205 p++;
206
207 return p->c_val;
208 }
209
210 static void
211 instance_limits(const char *limit, const char *value)
212 {
213 int i;
214 struct rlimit rlim;
215 unsigned long cur, max;
216
217 for (i = 0; rlimit_names[i].name != NULL; i++) {
218 if (strcmp(rlimit_names[i].name, limit))
219 continue;
220 if (!strcmp(value, "unlimited")) {
221 rlim.rlim_cur = RLIM_INFINITY;
222 rlim.rlim_max = RLIM_INFINITY;
223 } else {
224 if (getrlimit(rlimit_names[i].resource, &rlim))
225 return;
226
227 cur = rlim.rlim_cur;
228 max = rlim.rlim_max;
229
230 if (sscanf(value, "%lu %lu", &cur, &max) < 1)
231 return;
232
233 rlim.rlim_cur = cur;
234 rlim.rlim_max = max;
235 }
236
237 setrlimit(rlimit_names[i].resource, &rlim);
238 return;
239 }
240 }
241
242 static char *
243 instance_gen_setns_argstr(struct blob_attr *attr)
244 {
245 struct blob_attr *tb[__JAIL_SETNS_ATTR_MAX];
246 struct blob_attr *cur;
247 int rem, len, total;
248 char *ret;
249
250 blobmsg_parse(jail_setns_attr, __JAIL_SETNS_ATTR_MAX, tb,
251 blobmsg_data(attr), blobmsg_data_len(attr));
252
253 if (!tb[JAIL_SETNS_ATTR_PID] || !tb[JAIL_SETNS_ATTR_NS])
254 return NULL;
255
256 len = snprintf(NULL, 0, "%d:", blobmsg_get_u32(tb[JAIL_SETNS_ATTR_PID]));
257
258 blobmsg_for_each_attr(cur, tb[JAIL_SETNS_ATTR_NS], rem) {
259 char *tmp;
260
261 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
262 return NULL;
263
264 tmp = blobmsg_get_string(cur);
265 if (!tmp)
266 return NULL;
267
268 len += strlen(tmp) + 1;
269 }
270
271 total = len;
272 ret = malloc(total);
273 if (!ret)
274 return NULL;
275
276 len = snprintf(ret, total, "%d:", blobmsg_get_u32(tb[JAIL_SETNS_ATTR_PID]));
277
278 blobmsg_for_each_attr(cur, tb[JAIL_SETNS_ATTR_NS], rem) {
279 strncpy(&ret[len], blobmsg_get_string(cur), total - len);
280 len += strlen(blobmsg_get_string(cur));
281 ret[len++] = ',';
282 }
283 ret[total - 1] = '\0';
284
285 return ret;
286 }
287
288 static inline int
289 jail_run(struct service_instance *in, char **argv)
290 {
291 char *term_timeout_str;
292 struct blobmsg_list_node *var;
293 struct jail *jail = &in->jail;
294 int argc = 0;
295
296 argv[argc++] = UJAIL_BIN_PATH;
297
298 if (asprintf(&term_timeout_str, "%d", in->term_timeout) == -1)
299 exit(ENOMEM);
300
301 argv[argc++] = "-t";
302 argv[argc++] = term_timeout_str;
303
304 if (jail->name) {
305 argv[argc++] = "-n";
306 argv[argc++] = jail->name;
307 }
308
309 if (jail->hostname) {
310 argv[argc++] = "-h";
311 argv[argc++] = jail->hostname;
312 }
313
314 if (in->seccomp) {
315 argv[argc++] = "-S";
316 argv[argc++] = in->seccomp;
317 }
318
319 if (in->user) {
320 argv[argc++] = "-U";
321 argv[argc++] = in->user;
322 }
323
324 if (in->group) {
325 argv[argc++] = "-G";
326 argv[argc++] = in->group;
327 }
328
329 if (in->capabilities) {
330 argv[argc++] = "-C";
331 argv[argc++] = in->capabilities;
332 }
333
334 if (in->no_new_privs)
335 argv[argc++] = "-c";
336
337 if (jail->procfs)
338 argv[argc++] = "-p";
339
340 if (jail->sysfs)
341 argv[argc++] = "-s";
342
343 if (jail->ubus)
344 argv[argc++] = "-u";
345
346 if (jail->log)
347 argv[argc++] = "-l";
348
349 if (jail->ronly)
350 argv[argc++] = "-o";
351
352 if (jail->netns)
353 argv[argc++] = "-N";
354
355 if (jail->userns)
356 argv[argc++] = "-f";
357
358 if (jail->cgroupsns)
359 argv[argc++] = "-F";
360
361 if (jail->console)
362 argv[argc++] = "-y";
363
364 if (in->extroot) {
365 argv[argc++] = "-R";
366 argv[argc++] = in->extroot;
367 }
368
369 if (in->overlaydir) {
370 argv[argc++] = "-O";
371 argv[argc++] = in->overlaydir;
372 }
373
374 if (in->tmpoverlaysize) {
375 argv[argc++] = "-T";
376 argv[argc++] = in->tmpoverlaysize;
377 }
378
379 if (in->immediately)
380 argv[argc++] = "-i";
381
382 if (jail->pidfile) {
383 argv[argc++] = "-P";
384 argv[argc++] = jail->pidfile;
385 }
386
387 if (in->bundle) {
388 argv[argc++] = "-J";
389 argv[argc++] = in->bundle;
390 }
391
392 if (in->require_jail)
393 argv[argc++] = "-E";
394
395 blobmsg_list_for_each(&in->env, var) {
396 argv[argc++] = "-e";
397 argv[argc++] = (char *) blobmsg_name(var->data);
398 }
399
400 blobmsg_list_for_each(&jail->mount, var) {
401 const char *type = blobmsg_data(var->data);
402
403 if (*type == '1')
404 argv[argc++] = "-w";
405 else
406 argv[argc++] = "-r";
407 argv[argc++] = (char *) blobmsg_name(var->data);
408 }
409
410 blobmsg_list_for_each(&jail->setns, var) {
411 char *setns_arg = instance_gen_setns_argstr(var->data);
412
413 if (setns_arg) {
414 argv[argc++] = "-j";
415 argv[argc++] = setns_arg;
416 }
417 }
418
419 argv[argc++] = "--";
420
421 return argc;
422 }
423
424 static int
425 instance_removepid(struct service_instance *in) {
426 if (!in->pidfile)
427 return 0;
428 if (unlink(in->pidfile)) {
429 ERROR("Failed to remove pidfile: %s: %m\n", in->pidfile);
430 return 1;
431 }
432 return 0;
433 }
434
435 static int
436 instance_writepid(struct service_instance *in)
437 {
438 FILE *_pidfile;
439
440 if (!in->pidfile) {
441 return 0;
442 }
443 _pidfile = fopen(in->pidfile, "w");
444 if (_pidfile == NULL) {
445 ERROR("failed to open pidfile for writing: %s: %m", in->pidfile);
446 return 1;
447 }
448 if (fprintf(_pidfile, "%d\n", in->proc.pid) < 0) {
449 ERROR("failed to write pidfile: %s: %m", in->pidfile);
450 fclose(_pidfile);
451 return 2;
452 }
453 if (fclose(_pidfile)) {
454 ERROR("failed to close pidfile: %s: %m", in->pidfile);
455 return 3;
456 }
457
458 return 0;
459 }
460
461 static void
462 instance_run(struct service_instance *in, int _stdout, int _stderr)
463 {
464 struct blobmsg_list_node *var;
465 struct blob_attr *cur;
466 char **argv;
467 int argc = 1; /* NULL terminated */
468 int rem, _stdin;
469 bool seccomp = !in->trace && !in->has_jail && in->seccomp;
470 bool setlbf = _stdout >= 0;
471
472 if (in->nice)
473 setpriority(PRIO_PROCESS, 0, in->nice);
474
475 blobmsg_for_each_attr(cur, in->command, rem)
476 argc++;
477
478 blobmsg_list_for_each(&in->env, var)
479 setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1);
480
481 if (seccomp)
482 setenv("SECCOMP_FILE", in->seccomp, 1);
483
484 if (setlbf)
485 setenv("LD_PRELOAD", "/lib/libsetlbf.so", 1);
486
487 blobmsg_list_for_each(&in->limits, var)
488 instance_limits(blobmsg_name(var->data), blobmsg_data(var->data));
489
490 if (in->trace || seccomp)
491 argc += 1;
492
493 argv = alloca(sizeof(char *) * (argc + in->jail.argc));
494 argc = 0;
495
496 #ifdef SECCOMP_SUPPORT
497 if (in->trace)
498 argv[argc++] = "/sbin/utrace";
499 else if (seccomp)
500 argv[argc++] = "/sbin/seccomp-trace";
501 #else
502 if (in->trace || seccomp)
503 ULOG_WARN("Seccomp support for %s::%s not available\n", in->srv->name, in->name);
504 #endif
505
506 if (in->has_jail) {
507 argc = jail_run(in, argv);
508 if (argc != in->jail.argc)
509 ULOG_WARN("expected %i jail params, used %i for %s::%s\n",
510 in->jail.argc, argc, in->srv->name, in->name);
511 }
512
513 blobmsg_for_each_attr(cur, in->command, rem)
514 argv[argc++] = blobmsg_data(cur);
515
516 argv[argc] = NULL;
517
518 _stdin = open("/dev/null", O_RDONLY);
519
520 if (_stdout == -1)
521 _stdout = open("/dev/null", O_WRONLY);
522
523 if (_stderr == -1)
524 _stderr = open("/dev/null", O_WRONLY);
525
526 if (_stdin > -1) {
527 dup2(_stdin, STDIN_FILENO);
528 closefd(_stdin);
529 }
530 if (_stdout > -1) {
531 dup2(_stdout, STDOUT_FILENO);
532 closefd(_stdout);
533 }
534 if (_stderr > -1) {
535 dup2(_stderr, STDERR_FILENO);
536 closefd(_stderr);
537 }
538
539 if (!in->has_jail && in->user && in->pw_gid && initgroups(in->user, in->pw_gid)) {
540 ERROR("failed to initgroups() for user %s: %m\n", in->user);
541 exit(127);
542 }
543 if (!in->has_jail && in->gr_gid && setgid(in->gr_gid)) {
544 ERROR("failed to set group id %d: %m\n", in->gr_gid);
545 exit(127);
546 }
547 if (!in->has_jail && in->uid && setuid(in->uid)) {
548 ERROR("failed to set user id %d: %m\n", in->uid);
549 exit(127);
550 }
551
552 execvp(argv[0], argv);
553 exit(127);
554 }
555
556 static void
557 instance_add_cgroup(const char *service, const char *instance)
558 {
559 struct stat sb;
560 char cgnamebuf[256];
561 int fd;
562
563 if (stat("/sys/fs/cgroup/cgroup.subtree_control", &sb))
564 return;
565
566 mkdir(CGROUP_BASEDIR, 0700);
567
568 snprintf(cgnamebuf, sizeof(cgnamebuf), "%s/%s", CGROUP_BASEDIR, service);
569 mkdir(cgnamebuf, 0700);
570 snprintf(cgnamebuf, sizeof(cgnamebuf), "%s/%s/%s", CGROUP_BASEDIR, service, instance);
571 mkdir(cgnamebuf, 0700);
572 strcat(cgnamebuf, "/cgroup.procs");
573
574 fd = open(cgnamebuf, O_WRONLY);
575 if (fd == -1)
576 return;
577
578 dprintf(fd, "%d", getpid());
579 close(fd);
580 }
581
582 static void
583 instance_free_stdio(struct service_instance *in)
584 {
585 if (in->_stdout.fd.fd > -1) {
586 ustream_free(&in->_stdout.stream);
587 close(in->_stdout.fd.fd);
588 in->_stdout.fd.fd = -1;
589 }
590
591 if (in->_stderr.fd.fd > -1) {
592 ustream_free(&in->_stderr.stream);
593 close(in->_stderr.fd.fd);
594 in->_stderr.fd.fd = -1;
595 }
596
597 if (in->console.fd.fd > -1) {
598 ustream_free(&in->console.stream);
599 close(in->console.fd.fd);
600 in->console.fd.fd = -1;
601 }
602
603 if (in->console_client.fd.fd > -1) {
604 ustream_free(&in->console_client.stream);
605 close(in->console_client.fd.fd);
606 in->console_client.fd.fd = -1;
607 }
608 }
609
610 void
611 instance_start(struct service_instance *in)
612 {
613 int pid;
614 int opipe[2] = { -1, -1 };
615 int epipe[2] = { -1, -1 };
616
617 if (!avl_is_empty(&in->errors.avl)) {
618 LOG("Not starting instance %s::%s, an error was indicated\n", in->srv->name, in->name);
619 return;
620 }
621
622 if (!in->bundle && !in->command) {
623 LOG("Not starting instance %s::%s, command not set\n", in->srv->name, in->name);
624 return;
625 }
626
627 if (in->proc.pending) {
628 if (in->halt)
629 in->restart = true;
630 return;
631 }
632
633 instance_free_stdio(in);
634 if (in->_stdout.fd.fd > -2) {
635 if (pipe(opipe)) {
636 ULOG_WARN("pipe() failed: %m\n");
637 opipe[0] = opipe[1] = -1;
638 }
639 }
640
641 if (in->_stderr.fd.fd > -2) {
642 if (pipe(epipe)) {
643 ULOG_WARN("pipe() failed: %m\n");
644 epipe[0] = epipe[1] = -1;
645 }
646 }
647
648 in->restart = false;
649 in->halt = false;
650
651 if (!in->valid)
652 return;
653
654 pid = fork();
655 if (pid < 0)
656 return;
657
658 if (!pid) {
659 uloop_done();
660 closefd(opipe[0]);
661 closefd(epipe[0]);
662 instance_add_cgroup(in->srv->name, in->name);
663 instance_run(in, opipe[1], epipe[1]);
664 return;
665 }
666
667 DEBUG(2, "Started instance %s::%s[%d]\n", in->srv->name, in->name, pid);
668 in->proc.pid = pid;
669 instance_writepid(in);
670 clock_gettime(CLOCK_MONOTONIC, &in->start);
671 uloop_process_add(&in->proc);
672
673 if (opipe[0] > -1) {
674 ustream_fd_init(&in->_stdout, opipe[0]);
675 closefd(opipe[1]);
676 fcntl(opipe[0], F_SETFD, FD_CLOEXEC);
677 }
678
679 if (epipe[0] > -1) {
680 ustream_fd_init(&in->_stderr, epipe[0]);
681 closefd(epipe[1]);
682 fcntl(epipe[0], F_SETFD, FD_CLOEXEC);
683 }
684
685 if (in->watchdog.mode != INSTANCE_WATCHDOG_MODE_DISABLED) {
686 uloop_timeout_set(&in->watchdog.timeout, in->watchdog.freq * 1000);
687 DEBUG(2, "Started instance %s::%s watchdog timer : timeout = %d\n", in->srv->name, in->name, in->watchdog.freq);
688 }
689
690 service_event("instance.start", in->srv->name, in->name);
691 }
692
693 static void
694 instance_stdio(struct ustream *s, int prio, struct service_instance *in)
695 {
696 char *newline, *str, *arg0, ident[32];
697 int len;
698
699 arg0 = basename(blobmsg_data(blobmsg_data(in->command)));
700 snprintf(ident, sizeof(ident), "%s[%d]", arg0, in->proc.pid);
701 ulog_open(ULOG_SYSLOG, in->syslog_facility, ident);
702
703 do {
704 str = ustream_get_read_buf(s, &len);
705 if (!str)
706 break;
707
708 newline = memchr(str, '\n', len);
709 if (!newline && (s->r.buffer_len != len))
710 break;
711
712 if (newline) {
713 *newline = 0;
714 len = newline + 1 - str;
715 }
716 ulog(prio, "%s\n", str);
717
718 ustream_consume(s, len);
719 } while (1);
720
721 ulog_open(ULOG_SYSLOG, LOG_DAEMON, "procd");
722 }
723
724 static void
725 instance_stdout(struct ustream *s, int bytes)
726 {
727 instance_stdio(s, LOG_INFO,
728 container_of(s, struct service_instance, _stdout.stream));
729 }
730
731 static void
732 instance_console(struct ustream *s, int bytes)
733 {
734 struct service_instance *in = container_of(s, struct service_instance, console.stream);
735 char *buf;
736 int len;
737
738 do {
739 buf = ustream_get_read_buf(s, &len);
740 if (!buf)
741 break;
742
743 ulog(LOG_INFO, "out: %s\n", buf);
744
745 /* test if console client is attached */
746 if (in->console_client.fd.fd > -1)
747 ustream_write(&in->console_client.stream, buf, len, false);
748
749 ustream_consume(s, len);
750 } while (1);
751 }
752
753 static void
754 instance_console_client(struct ustream *s, int bytes)
755 {
756 struct service_instance *in = container_of(s, struct service_instance, console_client.stream);
757 char *buf;
758 int len;
759
760 do {
761 buf = ustream_get_read_buf(s, &len);
762 if (!buf)
763 break;
764
765 ulog(LOG_INFO, "in: %s\n", buf);
766 ustream_write(&in->console.stream, buf, len, false);
767 ustream_consume(s, len);
768 } while (1);
769 }
770
771 static void
772 instance_stderr(struct ustream *s, int bytes)
773 {
774 instance_stdio(s, LOG_ERR,
775 container_of(s, struct service_instance, _stderr.stream));
776 }
777
778 static void
779 instance_timeout(struct uloop_timeout *t)
780 {
781 struct service_instance *in;
782
783 in = container_of(t, struct service_instance, timeout);
784
785 if (in->halt) {
786 LOG("Instance %s::%s pid %d not stopped on SIGTERM, sending SIGKILL instead\n",
787 in->srv->name, in->name, in->proc.pid);
788 kill(in->proc.pid, SIGKILL);
789 } else if (in->restart || in->respawn)
790 instance_start(in);
791 }
792
793 static void
794 instance_delete(struct service_instance *in)
795 {
796 struct service *s = in->srv;
797
798 avl_delete(&s->instances.avl, &in->node.avl);
799 instance_free(in);
800 service_stopped(s);
801 }
802
803 static int
804 instance_exit_code(int ret)
805 {
806 if (WIFEXITED(ret)) {
807 return WEXITSTATUS(ret);
808 }
809
810 if (WIFSIGNALED(ret)) {
811 return SIGNALLED_OFFSET + WTERMSIG(ret);
812 }
813
814 if (WIFSTOPPED(ret)) {
815 return WSTOPSIG(ret);
816 }
817
818 return 1;
819 }
820
821 static void
822 instance_exit(struct uloop_process *p, int ret)
823 {
824 struct service_instance *in;
825 struct timespec tp;
826 long runtime;
827
828 in = container_of(p, struct service_instance, proc);
829
830 clock_gettime(CLOCK_MONOTONIC, &tp);
831 runtime = tp.tv_sec - in->start.tv_sec;
832
833 DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in->srv->name, in->name, ret, runtime);
834
835 in->exit_code = instance_exit_code(ret);
836 uloop_timeout_cancel(&in->timeout);
837 uloop_timeout_cancel(&in->watchdog.timeout);
838 service_event("instance.stop", in->srv->name, in->name);
839
840 if (in->halt) {
841 instance_removepid(in);
842 if (in->restart)
843 instance_start(in);
844 else
845 instance_delete(in);
846 } else if (in->restart) {
847 instance_start(in);
848 } else if (in->respawn) {
849 if (runtime < in->respawn_threshold)
850 in->respawn_count++;
851 else
852 in->respawn_count = 0;
853 if (in->respawn_count > in->respawn_retry && in->respawn_retry > 0 ) {
854 LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
855 in->srv->name, in->name, in->respawn_count, runtime);
856 in->restart = in->respawn = 0;
857 in->halt = 1;
858 service_event("instance.fail", in->srv->name, in->name);
859 } else {
860 service_event("instance.respawn", in->srv->name, in->name);
861 uloop_timeout_set(&in->timeout, in->respawn_timeout * 1000);
862 }
863 }
864 }
865
866 void
867 instance_stop(struct service_instance *in, bool halt)
868 {
869 if (!in->proc.pending) {
870 if (halt)
871 instance_delete(in);
872 return;
873 }
874 in->halt = halt;
875 in->restart = in->respawn = false;
876 kill(in->proc.pid, SIGTERM);
877 if (!in->has_jail)
878 uloop_timeout_set(&in->timeout, in->term_timeout * 1000);
879 }
880
881 static void
882 instance_restart(struct service_instance *in)
883 {
884 if (!in->proc.pending)
885 return;
886
887 if (in->reload_signal) {
888 kill(in->proc.pid, in->reload_signal);
889 return;
890 }
891
892 in->halt = true;
893 in->restart = true;
894 kill(in->proc.pid, SIGTERM);
895 if (!in->has_jail)
896 uloop_timeout_set(&in->timeout, in->term_timeout * 1000);
897 }
898
899 static void
900 instance_watchdog(struct uloop_timeout *t)
901 {
902 struct service_instance *in = container_of(t, struct service_instance, watchdog.timeout);
903
904 DEBUG(3, "instance %s::%s watchdog timer expired\n", in->srv->name, in->name);
905
906 if (in->respawn)
907 instance_restart(in);
908 else
909 instance_stop(in, true);
910 }
911
912 static bool string_changed(const char *a, const char *b)
913 {
914 return !((!a && !b) || (a && b && !strcmp(a, b)));
915 }
916
917 static bool
918 instance_config_changed(struct service_instance *in, struct service_instance *in_new)
919 {
920 if (!in->valid)
921 return true;
922
923 if (!blob_attr_equal(in->command, in_new->command))
924 return true;
925
926 if (string_changed(in->bundle, in_new->bundle))
927 return true;
928
929 if (string_changed(in->extroot, in_new->extroot))
930 return true;
931
932 if (string_changed(in->overlaydir, in_new->overlaydir))
933 return true;
934
935 if (string_changed(in->tmpoverlaysize, in_new->tmpoverlaysize))
936 return true;
937
938 if (!blobmsg_list_equal(&in->env, &in_new->env))
939 return true;
940
941 if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
942 return true;
943
944 if (!blobmsg_list_equal(&in->file, &in_new->file))
945 return true;
946
947 if (in->nice != in_new->nice)
948 return true;
949
950 if (in->syslog_facility != in_new->syslog_facility)
951 return true;
952
953 if (string_changed(in->user, in_new->user))
954 return true;
955
956 if (string_changed(in->group, in_new->group))
957 return true;
958
959 if (in->uid != in_new->uid)
960 return true;
961
962 if (in->pw_gid != in_new->pw_gid)
963 return true;
964
965 if (in->gr_gid != in_new->gr_gid)
966 return true;
967
968 if (string_changed(in->pidfile, in_new->pidfile))
969 return true;
970
971 if (in->respawn_retry != in_new->respawn_retry)
972 return true;
973 if (in->respawn_threshold != in_new->respawn_threshold)
974 return true;
975 if (in->respawn_timeout != in_new->respawn_timeout)
976 return true;
977
978 if (in->reload_signal != in_new->reload_signal)
979 return true;
980
981 if (in->term_timeout != in_new->term_timeout)
982 return true;
983
984 if (string_changed(in->seccomp, in_new->seccomp))
985 return true;
986
987 if (string_changed(in->capabilities, in_new->capabilities))
988 return true;
989
990 if (!blobmsg_list_equal(&in->limits, &in_new->limits))
991 return true;
992
993 if (!blobmsg_list_equal(&in->jail.mount, &in_new->jail.mount))
994 return true;
995
996 if (!blobmsg_list_equal(&in->jail.setns, &in_new->jail.setns))
997 return true;
998
999 if (!blobmsg_list_equal(&in->errors, &in_new->errors))
1000 return true;
1001
1002 if (in->has_jail != in_new->has_jail)
1003 return true;
1004
1005 if (in->trace != in_new->trace)
1006 return true;
1007
1008 if (in->require_jail != in_new->require_jail)
1009 return true;
1010
1011 if (in->immediately != in_new->immediately)
1012 return true;
1013
1014 if (in->no_new_privs != in_new->no_new_privs)
1015 return true;
1016
1017 if (string_changed(in->jail.name, in_new->jail.name))
1018 return true;
1019
1020 if (string_changed(in->jail.hostname, in_new->jail.hostname))
1021 return true;
1022
1023 if (string_changed(in->jail.pidfile, in_new->jail.pidfile))
1024 return true;
1025
1026 if (in->jail.procfs != in_new->jail.procfs)
1027 return true;
1028
1029 if (in->jail.sysfs != in_new->jail.sysfs)
1030 return true;
1031
1032 if (in->jail.ubus != in_new->jail.ubus)
1033 return true;
1034
1035 if (in->jail.log != in_new->jail.log)
1036 return true;
1037
1038 if (in->jail.ronly != in_new->jail.ronly)
1039 return true;
1040
1041 if (in->jail.netns != in_new->jail.netns)
1042 return true;
1043
1044 if (in->jail.userns != in_new->jail.userns)
1045 return true;
1046
1047 if (in->jail.cgroupsns != in_new->jail.cgroupsns)
1048 return true;
1049
1050 if (in->jail.console != in_new->jail.console)
1051 return true;
1052
1053 if (in->watchdog.mode != in_new->watchdog.mode)
1054 return true;
1055
1056 if (in->watchdog.freq != in_new->watchdog.freq)
1057 return true;
1058
1059 return false;
1060 }
1061
1062 static bool
1063 instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
1064 {
1065 struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
1066 struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
1067
1068 return n1->ifindex == n2->ifindex;
1069 }
1070
1071 static void
1072 instance_netdev_update(struct blobmsg_list_node *l)
1073 {
1074 struct instance_netdev *n = container_of(l, struct instance_netdev, node);
1075
1076 n->ifindex = if_nametoindex(n->node.avl.key);
1077 }
1078
1079 static bool
1080 instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
1081 {
1082 struct instance_file *f1 = container_of(l1, struct instance_file, node);
1083 struct instance_file *f2 = container_of(l2, struct instance_file, node);
1084
1085 return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
1086 }
1087
1088 static void
1089 instance_file_update(struct blobmsg_list_node *l)
1090 {
1091 struct instance_file *f = container_of(l, struct instance_file, node);
1092 md5_ctx_t md5;
1093 char buf[256];
1094 int len, fd;
1095
1096 memset(f->md5, 0, sizeof(f->md5));
1097
1098 fd = open(l->avl.key, O_RDONLY);
1099 if (fd < 0)
1100 return;
1101
1102 md5_begin(&md5);
1103 do {
1104 len = read(fd, buf, sizeof(buf));
1105 if (len < 0) {
1106 if (errno == EINTR)
1107 continue;
1108
1109 break;
1110 }
1111 if (!len)
1112 break;
1113
1114 md5_hash(buf, len, &md5);
1115 } while(1);
1116
1117 md5_end(f->md5, &md5);
1118 close(fd);
1119 }
1120
1121 static void
1122 instance_fill_any(struct blobmsg_list *l, struct blob_attr *cur)
1123 {
1124 if (!cur)
1125 return;
1126
1127 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), false);
1128 }
1129
1130 static bool
1131 instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
1132 {
1133 struct blobmsg_list_node *node;
1134
1135 if (!cur)
1136 return true;
1137
1138 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
1139 return false;
1140
1141 blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
1142 if (cb) {
1143 blobmsg_list_for_each(l, node)
1144 cb(node);
1145 }
1146 return true;
1147 }
1148
1149 static int
1150 instance_jail_parse(struct service_instance *in, struct blob_attr *attr)
1151 {
1152 struct blob_attr *tb[__JAIL_ATTR_MAX];
1153 struct jail *jail = &in->jail;
1154 struct blobmsg_list_node *var;
1155
1156 blobmsg_parse(jail_attr, __JAIL_ATTR_MAX, tb,
1157 blobmsg_data(attr), blobmsg_data_len(attr));
1158
1159 jail->argc = 4;
1160
1161 if (tb[JAIL_ATTR_REQUIREJAIL] && blobmsg_get_bool(tb[JAIL_ATTR_REQUIREJAIL])) {
1162 in->require_jail = true;
1163 jail->argc++;
1164 }
1165 if (tb[JAIL_ATTR_IMMEDIATELY] && blobmsg_get_bool(tb[JAIL_ATTR_IMMEDIATELY])) {
1166 in->immediately = true;
1167 jail->argc++;
1168 }
1169 if (tb[JAIL_ATTR_NAME]) {
1170 jail->name = strdup(blobmsg_get_string(tb[JAIL_ATTR_NAME]));
1171 jail->argc += 2;
1172 }
1173 if (tb[JAIL_ATTR_HOSTNAME]) {
1174 jail->hostname = strdup(blobmsg_get_string(tb[JAIL_ATTR_HOSTNAME]));
1175 jail->argc += 2;
1176 }
1177 if (tb[JAIL_ATTR_PROCFS] && blobmsg_get_bool(tb[JAIL_ATTR_PROCFS])) {
1178 jail->procfs = true;
1179 jail->argc++;
1180 }
1181 if (tb[JAIL_ATTR_SYSFS] && blobmsg_get_bool(tb[JAIL_ATTR_SYSFS])) {
1182 jail->sysfs = true;
1183 jail->argc++;
1184 }
1185 if (tb[JAIL_ATTR_UBUS] && blobmsg_get_bool(tb[JAIL_ATTR_UBUS])) {
1186 jail->ubus = true;
1187 jail->argc++;
1188 }
1189 if (tb[JAIL_ATTR_LOG] && blobmsg_get_bool(tb[JAIL_ATTR_LOG])) {
1190 jail->log = true;
1191 jail->argc++;
1192 }
1193 if (tb[JAIL_ATTR_RONLY] && blobmsg_get_bool(tb[JAIL_ATTR_RONLY])) {
1194 jail->ronly = true;
1195 jail->argc++;
1196 }
1197 if (tb[JAIL_ATTR_NETNS] && blobmsg_get_bool(tb[JAIL_ATTR_NETNS])) {
1198 jail->netns = true;
1199 jail->argc++;
1200 }
1201 if (tb[JAIL_ATTR_USERNS] && blobmsg_get_bool(tb[JAIL_ATTR_USERNS])) {
1202 jail->userns = true;
1203 jail->argc++;
1204 }
1205 if (tb[JAIL_ATTR_CGROUPSNS] && blobmsg_get_bool(tb[JAIL_ATTR_CGROUPSNS])) {
1206 jail->cgroupsns = true;
1207 jail->argc++;
1208 }
1209 if (tb[JAIL_ATTR_CONSOLE] && blobmsg_get_bool(tb[JAIL_ATTR_CONSOLE])) {
1210 jail->console = true;
1211 jail->argc++;
1212 }
1213 if (tb[JAIL_ATTR_PIDFILE]) {
1214 jail->pidfile = strdup(blobmsg_get_string(tb[JAIL_ATTR_PIDFILE]));
1215 jail->argc += 2;
1216 }
1217
1218 if (tb[JAIL_ATTR_SETNS]) {
1219 struct blob_attr *cur;
1220 int rem;
1221
1222 blobmsg_for_each_attr(cur, tb[JAIL_ATTR_SETNS], rem)
1223 jail->argc += 2;
1224 blobmsg_list_fill(&jail->setns, blobmsg_data(tb[JAIL_ATTR_SETNS]),
1225 blobmsg_data_len(tb[JAIL_ATTR_SETNS]), true);
1226 }
1227
1228 if (tb[JAIL_ATTR_MOUNT]) {
1229 struct blob_attr *cur;
1230 int rem;
1231
1232 blobmsg_for_each_attr(cur, tb[JAIL_ATTR_MOUNT], rem)
1233 jail->argc += 2;
1234 instance_fill_array(&jail->mount, tb[JAIL_ATTR_MOUNT], NULL, false);
1235 }
1236
1237 blobmsg_list_for_each(&in->env, var)
1238 jail->argc += 2;
1239
1240 if (in->seccomp)
1241 jail->argc += 2;
1242
1243 if (in->capabilities)
1244 jail->argc += 2;
1245
1246 if (in->user)
1247 jail->argc += 2;
1248
1249 if (in->group)
1250 jail->argc += 2;
1251
1252 if (in->extroot)
1253 jail->argc += 2;
1254
1255 if (in->overlaydir)
1256 jail->argc += 2;
1257
1258 if (in->tmpoverlaysize)
1259 jail->argc += 2;
1260
1261 if (in->no_new_privs)
1262 jail->argc++;
1263
1264 if (in->bundle)
1265 jail->argc += 2;
1266
1267 return true;
1268 }
1269
1270 static bool
1271 instance_config_parse_command(struct service_instance *in, struct blob_attr **tb)
1272 {
1273 struct blob_attr *cur, *cur2;
1274 bool ret = false;
1275 int rem;
1276
1277 cur = tb[INSTANCE_ATTR_COMMAND];
1278 if (!cur) {
1279 in->command = NULL;
1280 return true;
1281 }
1282
1283 if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
1284 return false;
1285
1286 blobmsg_for_each_attr(cur2, cur, rem) {
1287 ret = true;
1288 break;
1289 }
1290
1291 in->command = cur;
1292 return ret;
1293 }
1294
1295 static bool
1296 instance_config_parse(struct service_instance *in)
1297 {
1298 struct blob_attr *tb[__INSTANCE_ATTR_MAX];
1299 struct blob_attr *cur, *cur2;
1300 struct stat s;
1301 int rem, r;
1302
1303 blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
1304 blobmsg_data(in->config), blobmsg_data_len(in->config));
1305
1306 if (!tb[INSTANCE_ATTR_BUNDLE] && !instance_config_parse_command(in, tb))
1307 return false;
1308
1309 if (tb[INSTANCE_ATTR_TERMTIMEOUT])
1310 in->term_timeout = blobmsg_get_u32(tb[INSTANCE_ATTR_TERMTIMEOUT]);
1311 if (tb[INSTANCE_ATTR_RESPAWN]) {
1312 int i = 0;
1313 uint32_t vals[3] = { 3600, 5, 5};
1314
1315 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_RESPAWN], rem) {
1316 if ((i >= 3) && (blobmsg_type(cur2) == BLOBMSG_TYPE_STRING))
1317 continue;
1318 vals[i] = atoi(blobmsg_get_string(cur2));
1319 i++;
1320 }
1321 in->respawn = true;
1322 in->respawn_count = 0;
1323 in->respawn_threshold = vals[0];
1324 in->respawn_timeout = vals[1];
1325 in->respawn_retry = vals[2];
1326 }
1327 if (tb[INSTANCE_ATTR_TRIGGER]) {
1328 in->trigger = tb[INSTANCE_ATTR_TRIGGER];
1329 trigger_add(in->trigger, in);
1330 }
1331
1332 if (tb[INSTANCE_ATTR_WATCH]) {
1333 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_WATCH], rem) {
1334 if (blobmsg_type(cur2) != BLOBMSG_TYPE_STRING)
1335 continue;
1336 DEBUG(3, "watch for %s\n", blobmsg_get_string(cur2));
1337 watch_add(blobmsg_get_string(cur2), in);
1338 }
1339 }
1340
1341 if ((cur = tb[INSTANCE_ATTR_NICE])) {
1342 in->nice = (int8_t) blobmsg_get_u32(cur);
1343 if (in->nice < -20 || in->nice > 20)
1344 return false;
1345 }
1346
1347 if (tb[INSTANCE_ATTR_USER]) {
1348 const char *user = blobmsg_get_string(tb[INSTANCE_ATTR_USER]);
1349 struct passwd *p = getpwnam(user);
1350 if (p) {
1351 in->user = strdup(user);
1352 in->uid = p->pw_uid;
1353 in->gr_gid = in->pw_gid = p->pw_gid;
1354 }
1355 }
1356
1357 if (tb[INSTANCE_ATTR_GROUP]) {
1358 const char *group = blobmsg_get_string(tb[INSTANCE_ATTR_GROUP]);
1359 struct group *p = getgrnam(group);
1360 if (p) {
1361 in->group = strdup(group);
1362 in->gr_gid = p->gr_gid;
1363 }
1364 }
1365
1366 if (tb[INSTANCE_ATTR_TRACE])
1367 in->trace = blobmsg_get_bool(tb[INSTANCE_ATTR_TRACE]);
1368
1369 if (tb[INSTANCE_ATTR_NO_NEW_PRIVS])
1370 in->no_new_privs = blobmsg_get_bool(tb[INSTANCE_ATTR_NO_NEW_PRIVS]);
1371
1372 if (!in->trace && tb[INSTANCE_ATTR_SECCOMP])
1373 in->seccomp = strdup(blobmsg_get_string(tb[INSTANCE_ATTR_SECCOMP]));
1374
1375 if (tb[INSTANCE_ATTR_CAPABILITIES])
1376 in->capabilities = strdup(blobmsg_get_string(tb[INSTANCE_ATTR_CAPABILITIES]));
1377
1378 if (tb[INSTANCE_ATTR_EXTROOT])
1379 in->extroot = strdup(blobmsg_get_string(tb[INSTANCE_ATTR_EXTROOT]));
1380
1381 if (tb[INSTANCE_ATTR_OVERLAYDIR])
1382 in->overlaydir = strdup(blobmsg_get_string(tb[INSTANCE_ATTR_OVERLAYDIR]));
1383
1384 if (tb[INSTANCE_ATTR_TMPOVERLAYSIZE])
1385 in->tmpoverlaysize = strdup(blobmsg_get_string(tb[INSTANCE_ATTR_TMPOVERLAYSIZE]));
1386
1387 if (tb[INSTANCE_ATTR_BUNDLE])
1388 in->bundle = strdup(blobmsg_get_string(tb[INSTANCE_ATTR_BUNDLE]));
1389
1390 if (tb[INSTANCE_ATTR_PIDFILE]) {
1391 char *pidfile = blobmsg_get_string(tb[INSTANCE_ATTR_PIDFILE]);
1392 if (pidfile)
1393 in->pidfile = strdup(pidfile);
1394 }
1395
1396 if (tb[INSTANCE_ATTR_RELOADSIG])
1397 in->reload_signal = blobmsg_get_u32(tb[INSTANCE_ATTR_RELOADSIG]);
1398
1399 if (tb[INSTANCE_ATTR_STDOUT] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDOUT]))
1400 in->_stdout.fd.fd = -1;
1401
1402 if (tb[INSTANCE_ATTR_STDERR] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDERR]))
1403 in->_stderr.fd.fd = -1;
1404
1405 instance_fill_any(&in->data, tb[INSTANCE_ATTR_DATA]);
1406
1407 if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
1408 return false;
1409
1410 if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
1411 return false;
1412
1413 if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
1414 return false;
1415
1416 if (!instance_fill_array(&in->limits, tb[INSTANCE_ATTR_LIMITS], NULL, false))
1417 return false;
1418
1419 if (!instance_fill_array(&in->errors, tb[INSTANCE_ATTR_ERROR], NULL, true))
1420 return false;
1421
1422 if (tb[INSTANCE_ATTR_FACILITY]) {
1423 int facility = syslog_facility_str_to_int(blobmsg_get_string(tb[INSTANCE_ATTR_FACILITY]));
1424 if (facility != -1) {
1425 in->syslog_facility = facility;
1426 DEBUG(3, "setting facility '%s'\n", blobmsg_get_string(tb[INSTANCE_ATTR_FACILITY]));
1427 } else
1428 DEBUG(3, "unknown syslog facility '%s' given, using default (LOG_DAEMON)\n", blobmsg_get_string(tb[INSTANCE_ATTR_FACILITY]));
1429 }
1430
1431 if (tb[INSTANCE_ATTR_WATCHDOG]) {
1432 int i = 0;
1433 uint32_t vals[2] = { 0, 30 };
1434
1435 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_WATCHDOG], rem) {
1436 if (i >= 2)
1437 break;
1438
1439 vals[i] = atoi(blobmsg_get_string(cur2));
1440 i++;
1441 }
1442
1443 if (vals[0] >= 0 && vals[0] < __INSTANCE_WATCHDOG_MODE_MAX) {
1444 in->watchdog.mode = vals[0];
1445 DEBUG(3, "setting watchdog mode (%d)\n", vals[0]);
1446 } else {
1447 in->watchdog.mode = 0;
1448 DEBUG(3, "unknown watchdog mode (%d) given, using default (0)\n", vals[0]);
1449 }
1450
1451 if (vals[1] > 0) {
1452 in->watchdog.freq = vals[1];
1453 DEBUG(3, "setting watchdog timeout (%d)\n", vals[0]);
1454 } else {
1455 in->watchdog.freq = 30;
1456 DEBUG(3, "invalid watchdog timeout (%d) given, using default (30)\n", vals[1]);
1457 }
1458 }
1459
1460 if (!in->trace && tb[INSTANCE_ATTR_JAIL])
1461 in->has_jail = instance_jail_parse(in, tb[INSTANCE_ATTR_JAIL]);
1462
1463 if (in->has_jail) {
1464 r = stat(UJAIL_BIN_PATH, &s);
1465 if (r < 0) {
1466 if (in->require_jail) {
1467 ERROR("Cannot jail service %s::%s. %s: %m (%d)\n",
1468 in->srv->name, in->name, UJAIL_BIN_PATH, r);
1469 return false;
1470 }
1471 DEBUG(2, "unable to find %s: %m (%d)\n", UJAIL_BIN_PATH, r);
1472 in->has_jail = false;
1473 }
1474 }
1475
1476 return true;
1477 }
1478
1479 static void
1480 instance_config_cleanup(struct service_instance *in)
1481 {
1482 blobmsg_list_free(&in->env);
1483 blobmsg_list_free(&in->data);
1484 blobmsg_list_free(&in->netdev);
1485 blobmsg_list_free(&in->file);
1486 blobmsg_list_free(&in->limits);
1487 blobmsg_list_free(&in->errors);
1488 blobmsg_list_free(&in->jail.mount);
1489 blobmsg_list_free(&in->jail.setns);
1490 }
1491
1492 static void
1493 instance_config_move_strdup(char **dst, char *src)
1494 {
1495 if (*dst) {
1496 free(*dst);
1497 *dst = NULL;
1498 }
1499
1500 if (!src)
1501 return;
1502
1503 *dst = strdup(src);
1504 }
1505
1506 static void
1507 instance_config_move(struct service_instance *in, struct service_instance *in_src)
1508 {
1509 instance_config_cleanup(in);
1510 blobmsg_list_move(&in->env, &in_src->env);
1511 blobmsg_list_move(&in->data, &in_src->data);
1512 blobmsg_list_move(&in->netdev, &in_src->netdev);
1513 blobmsg_list_move(&in->file, &in_src->file);
1514 blobmsg_list_move(&in->limits, &in_src->limits);
1515 blobmsg_list_move(&in->errors, &in_src->errors);
1516 blobmsg_list_move(&in->jail.mount, &in_src->jail.mount);
1517 blobmsg_list_move(&in->jail.setns, &in_src->jail.setns);
1518 in->trigger = in_src->trigger;
1519 in->command = in_src->command;
1520 in->respawn = in_src->respawn;
1521 in->respawn_retry = in_src->respawn_retry;
1522 in->respawn_threshold = in_src->respawn_threshold;
1523 in->respawn_timeout = in_src->respawn_timeout;
1524 in->reload_signal = in_src->reload_signal;
1525 in->term_timeout = in_src->term_timeout;
1526 in->watchdog.mode = in_src->watchdog.mode;
1527 in->watchdog.freq = in_src->watchdog.freq;
1528 in->watchdog.timeout = in_src->watchdog.timeout;
1529 in->name = in_src->name;
1530 in->nice = in_src->nice;
1531 in->trace = in_src->trace;
1532 in->node.avl.key = in_src->node.avl.key;
1533 in->syslog_facility = in_src->syslog_facility;
1534 in->require_jail = in_src->require_jail;
1535 in->no_new_privs = in_src->no_new_privs;
1536 in->immediately = in_src->immediately;
1537 in->uid = in_src->uid;
1538 in->pw_gid = in_src->pw_gid;
1539 in->gr_gid = in_src->gr_gid;
1540
1541 in->has_jail = in_src->has_jail;
1542 in->jail.procfs = in_src->jail.procfs;
1543 in->jail.sysfs = in_src->jail.sysfs;
1544 in->jail.ubus = in_src->jail.ubus;
1545 in->jail.log = in_src->jail.log;
1546 in->jail.ronly = in_src->jail.ronly;
1547 in->jail.netns = in_src->jail.netns;
1548 in->jail.cgroupsns = in_src->jail.cgroupsns;
1549 in->jail.console = in_src->jail.console;
1550 in->jail.argc = in_src->jail.argc;
1551
1552 instance_config_move_strdup(&in->pidfile, in_src->pidfile);
1553 instance_config_move_strdup(&in->seccomp, in_src->seccomp);
1554 instance_config_move_strdup(&in->capabilities, in_src->capabilities);
1555 instance_config_move_strdup(&in->bundle, in_src->bundle);
1556 instance_config_move_strdup(&in->extroot, in_src->extroot);
1557 instance_config_move_strdup(&in->overlaydir, in_src->overlaydir);
1558 instance_config_move_strdup(&in->tmpoverlaysize, in_src->tmpoverlaysize);
1559 instance_config_move_strdup(&in->user, in_src->user);
1560 instance_config_move_strdup(&in->group, in_src->group);
1561 instance_config_move_strdup(&in->jail.name, in_src->jail.name);
1562 instance_config_move_strdup(&in->jail.hostname, in_src->jail.hostname);
1563 instance_config_move_strdup(&in->jail.pidfile, in_src->jail.pidfile);
1564
1565 free(in->config);
1566 in->config = in_src->config;
1567 in_src->config = NULL;
1568 }
1569
1570 void
1571 instance_update(struct service_instance *in, struct service_instance *in_new)
1572 {
1573 bool changed = instance_config_changed(in, in_new);
1574 bool running = in->proc.pending;
1575 bool stopping = in->halt;
1576
1577 if (!running || stopping) {
1578 instance_config_move(in, in_new);
1579 instance_start(in);
1580 } else {
1581 if (changed)
1582 instance_restart(in);
1583 instance_config_move(in, in_new);
1584 /* restart happens in the child callback handler */
1585 }
1586 }
1587
1588 void
1589 instance_free(struct service_instance *in)
1590 {
1591 instance_free_stdio(in);
1592 uloop_process_delete(&in->proc);
1593 uloop_timeout_cancel(&in->timeout);
1594 uloop_timeout_cancel(&in->watchdog.timeout);
1595 trigger_del(in);
1596 watch_del(in);
1597 instance_config_cleanup(in);
1598 free(in->config);
1599 free(in->user);
1600 free(in->group);
1601 free(in->extroot);
1602 free(in->overlaydir);
1603 free(in->tmpoverlaysize);
1604 free(in->bundle);
1605 free(in->jail.name);
1606 free(in->jail.hostname);
1607 free(in->jail.pidfile);
1608 free(in->seccomp);
1609 free(in->capabilities);
1610 free(in->pidfile);
1611 free(in);
1612 }
1613
1614 void
1615 instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
1616 {
1617 config = blob_memdup(config);
1618 in->srv = s;
1619 in->name = blobmsg_name(config);
1620 in->config = config;
1621 in->timeout.cb = instance_timeout;
1622 in->proc.cb = instance_exit;
1623 in->term_timeout = 5;
1624 in->syslog_facility = LOG_DAEMON;
1625 in->exit_code = 0;
1626 in->require_jail = false;
1627 in->immediately = false;
1628
1629 in->_stdout.fd.fd = -2;
1630 in->_stdout.stream.string_data = true;
1631 in->_stdout.stream.notify_read = instance_stdout;
1632
1633 in->_stderr.fd.fd = -2;
1634 in->_stderr.stream.string_data = true;
1635 in->_stderr.stream.notify_read = instance_stderr;
1636
1637 in->console.fd.fd = -2;
1638 in->console.stream.string_data = true;
1639 in->console.stream.notify_read = instance_console;
1640
1641 in->console_client.fd.fd = -2;
1642 in->console_client.stream.string_data = true;
1643 in->console_client.stream.notify_read = instance_console_client;
1644
1645 blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
1646 blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
1647 blobmsg_list_simple_init(&in->env);
1648 blobmsg_list_simple_init(&in->data);
1649 blobmsg_list_simple_init(&in->limits);
1650 blobmsg_list_simple_init(&in->errors);
1651 blobmsg_list_simple_init(&in->jail.mount);
1652 blobmsg_list_simple_init(&in->jail.setns);
1653
1654 in->watchdog.timeout.cb = instance_watchdog;
1655
1656 in->valid = instance_config_parse(in);
1657 }
1658
1659 void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
1660 {
1661 void *i;
1662
1663 if (!in->valid)
1664 return;
1665
1666 i = blobmsg_open_table(b, in->name);
1667 blobmsg_add_u8(b, "running", in->proc.pending);
1668 if (in->proc.pending)
1669 blobmsg_add_u32(b, "pid", in->proc.pid);
1670 if (in->command)
1671 blobmsg_add_blob(b, in->command);
1672 if (in->bundle)
1673 blobmsg_add_string(b, "bundle", in->bundle);
1674 blobmsg_add_u32(b, "term_timeout", in->term_timeout);
1675 if (!in->proc.pending)
1676 blobmsg_add_u32(b, "exit_code", in->exit_code);
1677
1678 if (!avl_is_empty(&in->errors.avl)) {
1679 struct blobmsg_list_node *var;
1680 void *e = blobmsg_open_array(b, "errors");
1681 blobmsg_list_for_each(&in->errors, var)
1682 blobmsg_add_string(b, NULL, blobmsg_data(var->data));
1683 blobmsg_close_table(b, e);
1684 }
1685
1686 if (!avl_is_empty(&in->env.avl)) {
1687 struct blobmsg_list_node *var;
1688 void *e = blobmsg_open_table(b, "env");
1689 blobmsg_list_for_each(&in->env, var)
1690 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1691 blobmsg_close_table(b, e);
1692 }
1693
1694 if (!avl_is_empty(&in->data.avl)) {
1695 struct blobmsg_list_node *var;
1696 void *e = blobmsg_open_table(b, "data");
1697 blobmsg_list_for_each(&in->data, var)
1698 blobmsg_add_blob(b, var->data);
1699 blobmsg_close_table(b, e);
1700 }
1701
1702 if (!avl_is_empty(&in->limits.avl)) {
1703 struct blobmsg_list_node *var;
1704 void *e = blobmsg_open_table(b, "limits");
1705 blobmsg_list_for_each(&in->limits, var)
1706 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1707 blobmsg_close_table(b, e);
1708 }
1709
1710 if (in->reload_signal)
1711 blobmsg_add_u32(b, "reload_signal", in->reload_signal);
1712
1713 if (in->respawn) {
1714 void *r = blobmsg_open_table(b, "respawn");
1715 blobmsg_add_u32(b, "threshold", in->respawn_threshold);
1716 blobmsg_add_u32(b, "timeout", in->respawn_timeout);
1717 blobmsg_add_u32(b, "retry", in->respawn_retry);
1718 blobmsg_close_table(b, r);
1719 }
1720
1721 if (in->trace)
1722 blobmsg_add_u8(b, "trace", true);
1723
1724 if (in->no_new_privs)
1725 blobmsg_add_u8(b, "no_new_privs", true);
1726
1727 if (in->seccomp)
1728 blobmsg_add_string(b, "seccomp", in->seccomp);
1729
1730 if (in->capabilities)
1731 blobmsg_add_string(b, "capabilities", in->capabilities);
1732
1733 if (in->pidfile)
1734 blobmsg_add_string(b, "pidfile", in->pidfile);
1735
1736 if (in->user)
1737 blobmsg_add_string(b, "user", in->user);
1738
1739 if (in->group)
1740 blobmsg_add_string(b, "group", in->group);
1741
1742 if (in->has_jail) {
1743 void *r = blobmsg_open_table(b, "jail");
1744 if (in->jail.name)
1745 blobmsg_add_string(b, "name", in->jail.name);
1746 if (!in->bundle) {
1747 if (in->jail.hostname)
1748 blobmsg_add_string(b, "hostname", in->jail.hostname);
1749
1750 blobmsg_add_u8(b, "procfs", in->jail.procfs);
1751 blobmsg_add_u8(b, "sysfs", in->jail.sysfs);
1752 blobmsg_add_u8(b, "ubus", in->jail.ubus);
1753 blobmsg_add_u8(b, "log", in->jail.log);
1754 blobmsg_add_u8(b, "ronly", in->jail.ronly);
1755 blobmsg_add_u8(b, "netns", in->jail.netns);
1756 blobmsg_add_u8(b, "userns", in->jail.userns);
1757 blobmsg_add_u8(b, "cgroupsns", in->jail.cgroupsns);
1758 } else {
1759 if (in->jail.pidfile)
1760 blobmsg_add_string(b, "pidfile", in->jail.pidfile);
1761
1762 blobmsg_add_u8(b, "immediately", in->immediately);
1763 }
1764 blobmsg_add_u8(b, "console", (in->console.fd.fd > -1));
1765 blobmsg_close_table(b, r);
1766 if (!avl_is_empty(&in->jail.mount.avl)) {
1767 struct blobmsg_list_node *var;
1768 void *e = blobmsg_open_table(b, "mount");
1769 blobmsg_list_for_each(&in->jail.mount, var)
1770 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1771 blobmsg_close_table(b, e);
1772 }
1773
1774 if (!avl_is_empty(&in->jail.setns.avl)) {
1775 struct blobmsg_list_node *var;
1776 void *s = blobmsg_open_array(b, "setns");
1777 blobmsg_list_for_each(&in->jail.setns, var)
1778 blobmsg_add_blob(b, var->data);
1779 blobmsg_close_array(b, s);
1780 }
1781 }
1782
1783 if (in->extroot)
1784 blobmsg_add_string(b, "extroot", in->extroot);
1785 if (in->overlaydir)
1786 blobmsg_add_string(b, "overlaydir", in->overlaydir);
1787 if (in->tmpoverlaysize)
1788 blobmsg_add_string(b, "tmpoverlaysize", in->tmpoverlaysize);
1789
1790 if (verbose && in->trigger)
1791 blobmsg_add_blob(b, in->trigger);
1792
1793 if (in->watchdog.mode != INSTANCE_WATCHDOG_MODE_DISABLED) {
1794 void *r = blobmsg_open_table(b, "watchdog");
1795 blobmsg_add_u32(b, "mode", in->watchdog.mode);
1796 blobmsg_add_u32(b, "timeout", in->watchdog.freq);
1797 blobmsg_close_table(b, r);
1798 }
1799
1800 blobmsg_close_table(b, i);
1801 }
OpenWrt service / process manager