ctdb/common/ctdb_util.c

   1 /*
   2    ctdb utility code
   3
   4    Copyright (C) Andrew Tridgell  2006
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "tdb.h"
  22 #include "system/network.h"
  23 #include "system/filesys.h"
  24 #include "system/wait.h"
  25 #include "system/shmem.h"
  26 #include "../include/ctdb_private.h"
  27
  28 int LogLevel = DEBUG_NOTICE;
  29 int this_log_level = 0;
  30
  31 /*
  32   return error string for last error
  33 */
  34 const char *ctdb_errstr(struct ctdb_context *ctdb)
  35 {
  36         return ctdb->err_msg;
  37 }
  38
  39
  40 /*
  41   remember an error message
  42 */
  43 void ctdb_set_error(struct ctdb_context *ctdb, const char *fmt, ...)
  44 {
  45         va_list ap;
  46         talloc_free(ctdb->err_msg);
  47         va_start(ap, fmt);
  48         ctdb->err_msg = talloc_vasprintf(ctdb, fmt, ap);
  49         DEBUG(DEBUG_ERR,("ctdb error: %s\n", ctdb->err_msg));
  50         va_end(ap);
  51 }
  52
  53 /*
  54   a fatal internal error occurred - no hope for recovery
  55 */
  56 void ctdb_fatal(struct ctdb_context *ctdb, const char *msg)
  57 {
  58         DEBUG(DEBUG_ALERT,("ctdb fatal error: %s\n", msg));
  59         abort();
  60 }
  61
  62 /*
  63   like ctdb_fatal() but a core/backtrace would not be useful
  64 */
  65 void ctdb_die(struct ctdb_context *ctdb, const char *msg)
  66 {
  67         DEBUG(DEBUG_ALERT,("ctdb exiting with error: %s\n", msg));
  68         exit(1);
  69 }
  70
  71 /* Invoke an external program to do some sort of tracing on the CTDB
  72  * process.  This might block for a little while.  The external
  73  * program is specified by the environment variable
  74  * CTDB_EXTERNAL_TRACE.  This program should take one argument: the
  75  * pid of the process to trace.  Commonly, the program would be a
  76  * wrapper script around gcore.
  77  */
  78 void ctdb_external_trace(void)
  79 {
  80
  81         const char * t = getenv("CTDB_EXTERNAL_TRACE");
  82         char * cmd;
  83
  84         if (t == NULL) {
  85                 return;
  86         }
  87
  88         cmd = talloc_asprintf(NULL, "%s %lu", t, (unsigned long) getpid());
  89         DEBUG(DEBUG_WARNING,("begin external trace: %s\n", cmd));
  90         system(cmd);
  91         DEBUG(DEBUG_WARNING,("end external trace: %s\n", cmd));
  92         talloc_free(cmd);
  93 }
  94
  95 /*
  96   parse a IP:port pair
  97 */
  98 int ctdb_parse_address(struct ctdb_context *ctdb,
  99                        TALLOC_CTX *mem_ctx, const char *str,
 100                        struct ctdb_address *address)
 101 {
 102         struct servent *se;
 103
 104         setservent(0);
 105         se = getservbyname("ctdb", "tcp");
 106         endservent();
 107
 108         address->address = talloc_strdup(mem_ctx, str);
 109         CTDB_NO_MEMORY(ctdb, address->address);
 110
 111         if (se == NULL) {
 112                 address->port = CTDB_PORT;
 113         } else {
 114                 address->port = ntohs(se->s_port);
 115         }
 116         return 0;
 117 }
 118
 119
 120 /*
 121   check if two addresses are the same
 122 */
 123 bool ctdb_same_address(struct ctdb_address *a1, struct ctdb_address *a2)
 124 {
 125         return strcmp(a1->address, a2->address) == 0 && a1->port == a2->port;
 126 }
 127
 128
 129 /*
 130   hash function for mapping data to a VNN - taken from tdb
 131 */
 132 uint32_t ctdb_hash(const TDB_DATA *key)
 133 {
 134         return tdb_jenkins_hash(discard_const(key));
 135 }
 136
 137 /*
 138   a type checking varient of idr_find
 139  */
 140 static void *_idr_find_type(struct idr_context *idp, int id, const char *type, const char *location)
 141 {
 142         void *p = idr_find(idp, id);
 143         if (p && talloc_check_name(p, type) == NULL) {
 144                 DEBUG(DEBUG_ERR,("%s idr_find_type expected type %s  but got %s\n",
 145                          location, type, talloc_get_name(p)));
 146                 return NULL;
 147         }
 148         return p;
 149 }
 150
 151 uint32_t ctdb_reqid_new(struct ctdb_context *ctdb, void *state)
 152 {
 153         int id = idr_get_new_above(ctdb->idr, state, ctdb->lastid+1, INT_MAX);
 154         if (id < 0) {
 155                 DEBUG(DEBUG_DEBUG, ("Reqid wrap!\n"));
 156                 id = idr_get_new(ctdb->idr, state, INT_MAX);
 157         }
 158         ctdb->lastid = id;
 159         return id;
 160 }
 161
 162 void *_ctdb_reqid_find(struct ctdb_context *ctdb, uint32_t reqid, const char *type, const char *location)
 163 {
 164         void *p;
 165
 166         p = _idr_find_type(ctdb->idr, reqid, type, location);
 167         if (p == NULL) {
 168                 DEBUG(DEBUG_WARNING, ("Could not find idr:%u\n",reqid));
 169         }
 170
 171         return p;
 172 }
 173
 174
 175 void ctdb_reqid_remove(struct ctdb_context *ctdb, uint32_t reqid)
 176 {
 177         int ret;
 178
 179         ret = idr_remove(ctdb->idr, reqid);
 180         if (ret != 0) {
 181                 DEBUG(DEBUG_ERR, ("Removing idr that does not exist\n"));
 182         }
 183 }
 184
 185
 186 /*
 187   form a ctdb_rec_data record from a key/data pair
 188
 189   note that header may be NULL. If not NULL then it is included in the data portion
 190   of the record
 191  */
 192 struct ctdb_rec_data *ctdb_marshall_record(TALLOC_CTX *mem_ctx, uint32_t reqid,
 193                                            TDB_DATA key,
 194                                            struct ctdb_ltdb_header *header,
 195                                            TDB_DATA data)
 196 {
 197         size_t length;
 198         struct ctdb_rec_data *d;
 199
 200         length = offsetof(struct ctdb_rec_data, data) + key.dsize +
 201                 data.dsize + (header?sizeof(*header):0);
 202         d = (struct ctdb_rec_data *)talloc_size(mem_ctx, length);
 203         if (d == NULL) {
 204                 return NULL;
 205         }
 206         d->length = length;
 207         d->reqid = reqid;
 208         d->keylen = key.dsize;
 209         memcpy(&d->data[0], key.dptr, key.dsize);
 210         if (header) {
 211                 d->datalen = data.dsize + sizeof(*header);
 212                 memcpy(&d->data[key.dsize], header, sizeof(*header));
 213                 memcpy(&d->data[key.dsize+sizeof(*header)], data.dptr, data.dsize);
 214         } else {
 215                 d->datalen = data.dsize;
 216                 memcpy(&d->data[key.dsize], data.dptr, data.dsize);
 217         }
 218         return d;
 219 }
 220
 221
 222 /* helper function for marshalling multiple records */
 223 struct ctdb_marshall_buffer *ctdb_marshall_add(TALLOC_CTX *mem_ctx,
 224                                                struct ctdb_marshall_buffer *m,
 225                                                uint64_t db_id,
 226                                                uint32_t reqid,
 227                                                TDB_DATA key,
 228                                                struct ctdb_ltdb_header *header,
 229                                                TDB_DATA data)
 230 {
 231         struct ctdb_rec_data *r;
 232         size_t m_size, r_size;
 233         struct ctdb_marshall_buffer *m2;
 234
 235         r = ctdb_marshall_record(mem_ctx, reqid, key, header, data);
 236         if (r == NULL) {
 237                 talloc_free(m);
 238                 return NULL;
 239         }
 240
 241         if (m == NULL) {
 242                 m = talloc_zero_size(mem_ctx, offsetof(struct ctdb_marshall_buffer, data));
 243                 if (m == NULL) {
 244                         return NULL;
 245                 }
 246                 m->db_id = db_id;
 247         }
 248
 249         m_size = talloc_get_size(m);
 250         r_size = talloc_get_size(r);
 251
 252         m2 = talloc_realloc_size(mem_ctx, m,  m_size + r_size);
 253         if (m2 == NULL) {
 254                 talloc_free(m);
 255                 return NULL;
 256         }
 257
 258         memcpy(m_size + (uint8_t *)m2, r, r_size);
 259
 260         talloc_free(r);
 261
 262         m2->count++;
 263
 264         return m2;
 265 }
 266
 267 /* we've finished marshalling, return a data blob with the marshalled records */
 268 TDB_DATA ctdb_marshall_finish(struct ctdb_marshall_buffer *m)
 269 {
 270         TDB_DATA data;
 271         data.dptr = (uint8_t *)m;
 272         data.dsize = talloc_get_size(m);
 273         return data;
 274 }
 275
 276 /*
 277    loop over a marshalling buffer
 278
 279      - pass r==NULL to start
 280      - loop the number of times indicated by m->count
 281 */
 282 struct ctdb_rec_data *ctdb_marshall_loop_next(struct ctdb_marshall_buffer *m, struct ctdb_rec_data *r,
 283                                               uint32_t *reqid,
 284                                               struct ctdb_ltdb_header *header,
 285                                               TDB_DATA *key, TDB_DATA *data)
 286 {
 287         if (r == NULL) {
 288                 r = (struct ctdb_rec_data *)&m->data[0];
 289         } else {
 290                 r = (struct ctdb_rec_data *)(r->length + (uint8_t *)r);
 291         }
 292
 293         if (reqid != NULL) {
 294                 *reqid = r->reqid;
 295         }
 296
 297         if (key != NULL) {
 298                 key->dptr   = &r->data[0];
 299                 key->dsize  = r->keylen;
 300         }
 301         if (data != NULL) {
 302                 data->dptr  = &r->data[r->keylen];
 303                 data->dsize = r->datalen;
 304                 if (header != NULL) {
 305                         data->dptr += sizeof(*header);
 306                         data->dsize -= sizeof(*header);
 307                 }
 308         }
 309
 310         if (header != NULL) {
 311                 if (r->datalen < sizeof(*header)) {
 312                         return NULL;
 313                 }
 314                 *header = *(struct ctdb_ltdb_header *)&r->data[r->keylen];
 315         }
 316
 317         return r;
 318 }
 319
 320
 321 #if HAVE_SCHED_H
 322 #include <sched.h>
 323 #endif
 324
 325 #if HAVE_PROCINFO_H
 326 #include <procinfo.h>
 327 #endif
 328
 329 /*
 330   if possible, make this task real time
 331  */
 332 void ctdb_set_scheduler(struct ctdb_context *ctdb)
 333 {
 334 #ifdef _AIX_
 335 #if HAVE_THREAD_SETSCHED
 336         struct thrdentry64 te;
 337         tid64_t ti;
 338
 339         ti = 0ULL;
 340         if (getthrds64(getpid(), &te, sizeof(te), &ti, 1) != 1) {
 341                 DEBUG(DEBUG_ERR, ("Unable to get thread information\n"));
 342                 return;
 343         }
 344
 345         if (ctdb->saved_scheduler_param == NULL) {
 346                 ctdb->saved_scheduler_param = talloc_size(ctdb, sizeof(te));
 347         }
 348         *(struct thrdentry64 *)ctdb->saved_scheduler_param = te;
 349
 350         if (thread_setsched(te.ti_tid, 0, SCHED_RR) == -1) {
 351                 DEBUG(DEBUG_ERR, ("Unable to set scheduler to SCHED_RR (%s)\n",
 352                                   strerror(errno)));
 353         } else {
 354                 DEBUG(DEBUG_NOTICE, ("Set scheduler to SCHED_RR\n"));
 355         }
 356 #endif
 357 #else /* no AIX */
 358 #if HAVE_SCHED_SETSCHEDULER
 359         struct sched_param p;
 360         if (ctdb->saved_scheduler_param == NULL) {
 361                 ctdb->saved_scheduler_param = talloc_size(ctdb, sizeof(p));
 362         }
 363
 364         if (sched_getparam(0, (struct sched_param *)ctdb->saved_scheduler_param) == -1) {
 365                 DEBUG(DEBUG_ERR,("Unable to get old scheduler params\n"));
 366                 return;
 367         }
 368
 369         p = *(struct sched_param *)ctdb->saved_scheduler_param;
 370         p.sched_priority = 1;
 371
 372         if (sched_setscheduler(0, SCHED_FIFO, &p) == -1) {
 373                 DEBUG(DEBUG_CRIT,("Unable to set scheduler to SCHED_FIFO (%s)\n",
 374                          strerror(errno)));
 375         } else {
 376                 DEBUG(DEBUG_NOTICE,("Set scheduler to SCHED_FIFO\n"));
 377         }
 378 #endif
 379 #endif
 380 }
 381
 382 /*
 383   restore previous scheduler parameters
 384  */
 385 void ctdb_restore_scheduler(struct ctdb_context *ctdb)
 386 {
 387 #ifdef _AIX_
 388 #if HAVE_THREAD_SETSCHED
 389         struct thrdentry64 te, *saved;
 390         tid64_t ti;
 391
 392         ti = 0ULL;
 393         if (getthrds64(getpid(), &te, sizeof(te), &ti, 1) != 1) {
 394                 ctdb_fatal(ctdb, "Unable to get thread information\n");
 395         }
 396         if (ctdb->saved_scheduler_param == NULL) {
 397                 ctdb_fatal(ctdb, "No saved scheduler parameters\n");
 398         }
 399         saved = (struct thrdentry64 *)ctdb->saved_scheduler_param;
 400         if (thread_setsched(te.ti_tid, saved->ti_pri, saved->ti_policy) == -1) {
 401                 ctdb_fatal(ctdb, "Unable to restore old scheduler parameters\n");
 402         }
 403 #endif
 404 #else /* no AIX */
 405 #if HAVE_SCHED_SETSCHEDULER
 406         if (ctdb->saved_scheduler_param == NULL) {
 407                 ctdb_fatal(ctdb, "No saved scheduler parameters\n");
 408         }
 409         if (sched_setscheduler(0, SCHED_OTHER, (struct sched_param *)ctdb->saved_scheduler_param) == -1) {
 410                 ctdb_fatal(ctdb, "Unable to restore old scheduler parameters\n");
 411         }
 412 #endif
 413 #endif
 414 }
 415
 416 void set_nonblocking(int fd)
 417 {
 418         int v;
 419
 420         v = fcntl(fd, F_GETFL, 0);
 421         if (v == -1) {
 422                 DEBUG(DEBUG_WARNING, ("Failed to get file status flags - %s\n",
 423                                       strerror(errno)));
 424                 return;
 425         }
 426         if (fcntl(fd, F_SETFL, v | O_NONBLOCK) == -1) {
 427                 DEBUG(DEBUG_WARNING, ("Failed to set non_blocking on fd - %s\n",
 428                                       strerror(errno)));
 429         }
 430 }
 431
 432 void set_close_on_exec(int fd)
 433 {
 434         int v;
 435
 436         v = fcntl(fd, F_GETFD, 0);
 437         if (v == -1) {
 438                 DEBUG(DEBUG_WARNING, ("Failed to get file descriptor flags - %s\n",
 439                                       strerror(errno)));
 440                 return;
 441         }
 442         if (fcntl(fd, F_SETFD, v | FD_CLOEXEC) != 0) {
 443                 DEBUG(DEBUG_WARNING, ("Failed to set close_on_exec on fd - %s\n",
 444                                       strerror(errno)));
 445         }
 446 }
 447
 448
 449 bool parse_ipv4(const char *s, unsigned port, struct sockaddr_in *sin)
 450 {
 451         sin->sin_family = AF_INET;
 452         sin->sin_port   = htons(port);
 453
 454         if (inet_pton(AF_INET, s, &sin->sin_addr) != 1) {
 455                 DEBUG(DEBUG_ERR, (__location__ " Failed to translate %s into sin_addr\n", s));
 456                 return false;
 457         }
 458
 459         return true;
 460 }
 461
 462 static bool parse_ipv6(const char *s, const char *ifaces, unsigned port, ctdb_sock_addr *saddr)
 463 {
 464         saddr->ip6.sin6_family   = AF_INET6;
 465         saddr->ip6.sin6_port     = htons(port);
 466         saddr->ip6.sin6_flowinfo = 0;
 467         saddr->ip6.sin6_scope_id = 0;
 468
 469         if (inet_pton(AF_INET6, s, &saddr->ip6.sin6_addr) != 1) {
 470                 DEBUG(DEBUG_ERR, (__location__ " Failed to translate %s into sin6_addr\n", s));
 471                 return false;
 472         }
 473
 474         if (ifaces && IN6_IS_ADDR_LINKLOCAL(&saddr->ip6.sin6_addr)) {
 475                 if (strchr(ifaces, ',')) {
 476                         DEBUG(DEBUG_ERR, (__location__ " Link local address %s "
 477                                           "is specified for multiple ifaces %s\n",
 478                                           s, ifaces));
 479                         return false;
 480                 }
 481                 saddr->ip6.sin6_scope_id = if_nametoindex(ifaces);
 482         }
 483
 484         return true;
 485 }
 486 /*
 487   parse a ip:port pair
 488  */
 489 bool parse_ip_port(const char *addr, ctdb_sock_addr *saddr)
 490 {
 491         TALLOC_CTX *tmp_ctx = talloc_new(NULL);
 492         char *s, *p;
 493         unsigned port;
 494         char *endp = NULL;
 495         bool ret;
 496
 497         s = talloc_strdup(tmp_ctx, addr);
 498         if (s == NULL) {
 499                 DEBUG(DEBUG_ERR, (__location__ " Failed strdup()\n"));
 500                 talloc_free(tmp_ctx);
 501                 return false;
 502         }
 503
 504         p = rindex(s, ':');
 505         if (p == NULL) {
 506                 DEBUG(DEBUG_ERR, (__location__ " This addr: %s does not contain a port number\n", s));
 507                 talloc_free(tmp_ctx);
 508                 return false;
 509         }
 510
 511         port = strtoul(p+1, &endp, 10);
 512         if (endp == NULL || *endp != 0) {
 513                 /* trailing garbage */
 514                 DEBUG(DEBUG_ERR, (__location__ " Trailing garbage after the port in %s\n", s));
 515                 talloc_free(tmp_ctx);
 516                 return false;
 517         }
 518         *p = 0;
 519
 520
 521         /* now is this a ipv4 or ipv6 address ?*/
 522         ret = parse_ip(s, NULL, port, saddr);
 523
 524         talloc_free(tmp_ctx);
 525         return ret;
 526 }
 527
 528 /*
 529   parse an ip
 530  */
 531 bool parse_ip(const char *addr, const char *ifaces, unsigned port, ctdb_sock_addr *saddr)
 532 {
 533         char *p;
 534         bool ret;
 535
 536         ZERO_STRUCTP(saddr); /* valgrind :-) */
 537
 538         /* now is this a ipv4 or ipv6 address ?*/
 539         p = index(addr, ':');
 540         if (p == NULL) {
 541                 ret = parse_ipv4(addr, port, &saddr->ip);
 542         } else {
 543                 ret = parse_ipv6(addr, ifaces, port, saddr);
 544         }
 545
 546         return ret;
 547 }
 548
 549 /*
 550   parse a ip/mask pair
 551  */
 552 bool parse_ip_mask(const char *str, const char *ifaces, ctdb_sock_addr *addr, unsigned *mask)
 553 {
 554         TALLOC_CTX *tmp_ctx = talloc_new(NULL);
 555         char *s, *p;
 556         char *endp = NULL;
 557         bool ret;
 558
 559         ZERO_STRUCT(*addr);
 560         s = talloc_strdup(tmp_ctx, str);
 561         if (s == NULL) {
 562                 DEBUG(DEBUG_ERR, (__location__ " Failed strdup()\n"));
 563                 talloc_free(tmp_ctx);
 564                 return false;
 565         }
 566
 567         p = rindex(s, '/');
 568         if (p == NULL) {
 569                 DEBUG(DEBUG_ERR, (__location__ " This addr: %s does not contain a mask\n", s));
 570                 talloc_free(tmp_ctx);
 571                 return false;
 572         }
 573
 574         *mask = strtoul(p+1, &endp, 10);
 575         if (endp == NULL || *endp != 0) {
 576                 /* trailing garbage */
 577                 DEBUG(DEBUG_ERR, (__location__ " Trailing garbage after the mask in %s\n", s));
 578                 talloc_free(tmp_ctx);
 579                 return false;
 580         }
 581         *p = 0;
 582
 583
 584         /* now is this a ipv4 or ipv6 address ?*/
 585         ret = parse_ip(s, ifaces, 0, addr);
 586
 587         talloc_free(tmp_ctx);
 588         return ret;
 589 }
 590
 591 /*
 592    This is used to canonicalize a ctdb_sock_addr structure.
 593 */
 594 void ctdb_canonicalize_ip(const ctdb_sock_addr *ip, ctdb_sock_addr *cip)
 595 {
 596         char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
 597
 598         memcpy(cip, ip, sizeof (*cip));
 599
 600         if ( (ip->sa.sa_family == AF_INET6)
 601         && !memcmp(&ip->ip6.sin6_addr, prefix, 12)) {
 602                 memset(cip, 0, sizeof(*cip));
 603 #ifdef HAVE_SOCK_SIN_LEN
 604                 cip->ip.sin_len = sizeof(*cip);
 605 #endif
 606                 cip->ip.sin_family = AF_INET;
 607                 cip->ip.sin_port   = ip->ip6.sin6_port;
 608                 memcpy(&cip->ip.sin_addr, &ip->ip6.sin6_addr.s6_addr[12], 4);
 609         }
 610 }
 611
 612 bool ctdb_same_ip(const ctdb_sock_addr *tip1, const ctdb_sock_addr *tip2)
 613 {
 614         ctdb_sock_addr ip1, ip2;
 615
 616         ctdb_canonicalize_ip(tip1, &ip1);
 617         ctdb_canonicalize_ip(tip2, &ip2);
 618
 619         if (ip1.sa.sa_family != ip2.sa.sa_family) {
 620                 return false;
 621         }
 622
 623         switch (ip1.sa.sa_family) {
 624         case AF_INET:
 625                 return ip1.ip.sin_addr.s_addr == ip2.ip.sin_addr.s_addr;
 626         case AF_INET6:
 627                 return !memcmp(&ip1.ip6.sin6_addr.s6_addr[0],
 628                                 &ip2.ip6.sin6_addr.s6_addr[0],
 629                                 16);
 630         default:
 631                 DEBUG(DEBUG_ERR, (__location__ " CRITICAL Can not compare sockaddr structures of type %u\n", ip1.sa.sa_family));
 632                 return false;
 633         }
 634
 635         return true;
 636 }
 637
 638 /*
 639   compare two ctdb_sock_addr structures
 640  */
 641 bool ctdb_same_sockaddr(const ctdb_sock_addr *ip1, const ctdb_sock_addr *ip2)
 642 {
 643         return ctdb_same_ip(ip1, ip2) && ip1->ip.sin_port == ip2->ip.sin_port;
 644 }
 645
 646 char *ctdb_addr_to_str(ctdb_sock_addr *addr)
 647 {
 648         static char cip[128] = "";
 649
 650         switch (addr->sa.sa_family) {
 651         case AF_INET:
 652                 inet_ntop(addr->ip.sin_family, &addr->ip.sin_addr, cip, sizeof(cip));
 653                 break;
 654         case AF_INET6:
 655                 inet_ntop(addr->ip6.sin6_family, &addr->ip6.sin6_addr, cip, sizeof(cip));
 656                 break;
 657         default:
 658                 DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
 659                 ctdb_external_trace();
 660         }
 661
 662         return cip;
 663 }
 664
 665 unsigned ctdb_addr_to_port(ctdb_sock_addr *addr)
 666 {
 667         switch (addr->sa.sa_family) {
 668         case AF_INET:
 669                 return ntohs(addr->ip.sin_port);
 670                 break;
 671         case AF_INET6:
 672                 return ntohs(addr->ip6.sin6_port);
 673                 break;
 674         default:
 675                 DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
 676         }
 677
 678         return 0;
 679 }
 680
 681 void ctdb_block_signal(int signum)
 682 {
 683         sigset_t set;
 684         sigemptyset(&set);
 685         sigaddset(&set,signum);
 686         sigprocmask(SIG_BLOCK,&set,NULL);
 687 }
 688
 689 void ctdb_unblock_signal(int signum)
 690 {
 691         sigset_t set;
 692         sigemptyset(&set);
 693         sigaddset(&set,signum);
 694         sigprocmask(SIG_UNBLOCK,&set,NULL);
 695 }
 696
 697 struct debug_levels debug_levels[] = {
 698         {DEBUG_EMERG,   "EMERG"},
 699         {DEBUG_ALERT,   "ALERT"},
 700         {DEBUG_CRIT,    "CRIT"},
 701         {DEBUG_ERR,     "ERR"},
 702         {DEBUG_WARNING, "WARNING"},
 703         {DEBUG_NOTICE,  "NOTICE"},
 704         {DEBUG_INFO,    "INFO"},
 705         {DEBUG_DEBUG,   "DEBUG"},
 706         {0, NULL}
 707 };
 708
 709 const char *get_debug_by_level(int32_t level)
 710 {
 711         int i;
 712
 713         for (i=0; debug_levels[i].description != NULL; i++) {
 714                 if (debug_levels[i].level == level) {
 715                         return debug_levels[i].description;
 716                 }
 717         }
 718         return "Unknown";
 719 }
 720
 721 int32_t get_debug_by_desc(const char *desc)
 722 {
 723         int i;
 724
 725         for (i=0; debug_levels[i].description != NULL; i++) {
 726                 if (!strcasecmp(debug_levels[i].description, desc)) {
 727                         return debug_levels[i].level;
 728                 }
 729         }
 730
 731         return DEBUG_ERR;
 732 }
 733
 734 /* we don't lock future pages here; it would increase the chance that
 735  * we'd fail to mmap later on. */
 736 void ctdb_lockdown_memory(struct ctdb_context *ctdb)
 737 {
 738 #ifdef HAVE_MLOCKALL
 739         /* Extra stack, please! */
 740         char dummy[10000];
 741         memset(dummy, 0, sizeof(dummy));
 742
 743         if (ctdb->valgrinding) {
 744                 return;
 745         }
 746
 747         /* TODO: Add a command line option to disable memory lockdown.
 748          *       This can be a performance issue on AIX since fork() copies
 749          *       all locked memory pages.
 750          */
 751
 752         /* Ignore when running in local daemons mode */
 753         if (getuid() != 0) {
 754                 return;
 755         }
 756
 757         /* Avoid compiler optimizing out dummy. */
 758         mlock(dummy, sizeof(dummy));
 759         if (mlockall(MCL_CURRENT) != 0) {
 760                 DEBUG(DEBUG_WARNING,("Failed to lockdown memory: %s'\n",
 761                                      strerror(errno)));
 762         }
 763 #endif
 764 }
 765
 766 const char *ctdb_eventscript_call_names[] = {
 767         "init",
 768         "setup",
 769         "startup",
 770         "startrecovery",
 771         "recovered",
 772         "takeip",
 773         "releaseip",
 774         "stopped",
 775         "monitor",
 776         "status",
 777         "shutdown",
 778         "reload",
 779         "updateip",
 780         "ipreallocated"
 781 };
 782
 783 /* Runstate handling */
 784 static struct {
 785         enum ctdb_runstate runstate;
 786         const char * label;
 787 } runstate_map[] = {
 788         { CTDB_RUNSTATE_UNKNOWN, "UNKNOWN" },
 789         { CTDB_RUNSTATE_INIT, "INIT" },
 790         { CTDB_RUNSTATE_SETUP, "SETUP" },
 791         { CTDB_RUNSTATE_FIRST_RECOVERY, "FIRST_RECOVERY" },
 792         { CTDB_RUNSTATE_STARTUP, "STARTUP" },
 793         { CTDB_RUNSTATE_RUNNING, "RUNNING" },
 794         { CTDB_RUNSTATE_SHUTDOWN, "SHUTDOWN" },
 795         { -1, NULL },
 796 };
 797
 798 const char *runstate_to_string(enum ctdb_runstate runstate)
 799 {
 800         int i;
 801         for (i=0; runstate_map[i].label != NULL ; i++) {
 802                 if (runstate_map[i].runstate == runstate) {
 803                         return runstate_map[i].label;
 804                 }
 805         }
 806
 807         return runstate_map[0].label;
 808 }
 809
 810 enum ctdb_runstate runstate_from_string(const char *label)
 811 {
 812         int i;
 813         for (i=0; runstate_map[i].label != NULL; i++) {
 814                 if (strcasecmp(runstate_map[i].label, label) == 0) {
 815                         return runstate_map[i].runstate;
 816                 }
 817         }
 818
 819         return CTDB_RUNSTATE_UNKNOWN;
 820 }
 821
 822 void ctdb_set_runstate(struct ctdb_context *ctdb, enum ctdb_runstate runstate)
 823 {
 824         if (runstate <= ctdb->runstate) {
 825                 ctdb_fatal(ctdb, "runstate must always increase");
 826         }
 827
 828         DEBUG(DEBUG_NOTICE,("Set runstate to %s (%d)\n",
 829                             runstate_to_string(runstate), runstate));
 830         ctdb->runstate = runstate;
 831 }
 832
 833 void ctdb_mkdir_p_or_die(struct ctdb_context *ctdb, const char *dir, int mode)
 834 {
 835         int ret;
 836
 837         ret = mkdir_p(dir, mode);
 838         if (ret != 0) {
 839                 DEBUG(DEBUG_ALERT,
 840                       ("ctdb exiting with error: "
 841                        "failed to create directory \"%s\" (%s)\n",
 842                        dir, strerror(errno)));
 843                 exit(1);
 844         }
 845 }