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