git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/stats.c

   1 /*
   2 */
   3
   4 #include "common.h"
   5
   6 static const char *memcached_stat_keys[] = {
   7   "pid",
   8   "uptime",
   9   "time",
  10   "version",
  11   "pointer_size",
  12   "rusage_user",
  13   "rusage_system",
  14   "curr_items",
  15   "total_items",
  16   "bytes",
  17   "curr_connections",
  18   "total_connections",
  19   "connection_structures",
  20   "cmd_get",
  21   "cmd_set",
  22   "get_hits",
  23   "get_misses",
  24   "evictions",
  25   "bytes_read",
  26   "bytes_written",
  27   "limit_maxbytes",
  28   "threads",
  29   NULL
  30 };
  31
  32 struct local_context
  33 {
  34   memcached_stat_fn func;
  35   void *context;
  36   const char *args;
  37 };
  38
  39
  40 static memcached_return_t set_data(memcached_stat_st *memc_stat, char *key, char *value)
  41 {
  42
  43   if (strlen(key) < 1)
  44   {
  45     WATCHPOINT_STRING(key);
  46     return MEMCACHED_UNKNOWN_STAT_KEY;
  47   }
  48   else if (!strcmp("pid", key))
  49   {
  50     memc_stat->pid= (uint32_t) strtol(value, (char **)NULL, 10);
  51   }
  52   else if (!strcmp("uptime", key))
  53   {
  54     memc_stat->uptime= (uint32_t) strtol(value, (char **)NULL, 10);
  55   }
  56   else if (!strcmp("time", key))
  57   {
  58     memc_stat->time= (uint32_t) strtol(value, (char **)NULL, 10);
  59   }
  60   else if (!strcmp("version", key))
  61   {
  62     memcpy(memc_stat->version, value, strlen(value));
  63     memc_stat->version[strlen(value)]= 0;
  64   }
  65   else if (!strcmp("pointer_size", key))
  66   {
  67     memc_stat->pointer_size= (uint32_t) strtol(value, (char **)NULL, 10);
  68   }
  69   else if (!strcmp("rusage_user", key))
  70   {
  71     char *walk_ptr;
  72     for (walk_ptr= value; (!ispunct(*walk_ptr)); walk_ptr++);
  73     *walk_ptr= 0;
  74     walk_ptr++;
  75     memc_stat->rusage_user_seconds= (uint32_t) strtol(value, (char **)NULL, 10);
  76     memc_stat->rusage_user_microseconds= (uint32_t) strtol(walk_ptr, (char **)NULL, 10);
  77   }
  78   else if (!strcmp("rusage_system", key))
  79   {
  80     char *walk_ptr;
  81     for (walk_ptr= value; (!ispunct(*walk_ptr)); walk_ptr++);
  82     *walk_ptr= 0;
  83     walk_ptr++;
  84     memc_stat->rusage_system_seconds= (uint32_t) strtol(value, (char **)NULL, 10);
  85     memc_stat->rusage_system_microseconds= (uint32_t) strtol(walk_ptr, (char **)NULL, 10);
  86   }
  87   else if (!strcmp("curr_items", key))
  88   {
  89     memc_stat->curr_items= (uint32_t) strtol(value, (char **)NULL, 10);
  90   }
  91   else if (!strcmp("total_items", key))
  92   {
  93     memc_stat->total_items= (uint32_t) strtol(value, (char **)NULL, 10);
  94   }
  95   else if (!strcmp("bytes_read", key))
  96   {
  97     memc_stat->bytes_read= (uint32_t) strtoll(value, (char **)NULL, 10);
  98   }
  99   else if (!strcmp("bytes_written", key))
 100   {
 101     memc_stat->bytes_written= (uint32_t) strtoll(value, (char **)NULL, 10);
 102   }
 103   else if (!strcmp("bytes", key))
 104   {
 105     memc_stat->bytes= (uint32_t) strtoll(value, (char **)NULL, 10);
 106   }
 107   else if (!strcmp("curr_connections", key))
 108   {
 109     memc_stat->curr_connections= (uint32_t) strtoll(value, (char **)NULL, 10);
 110   }
 111   else if (!strcmp("total_connections", key))
 112   {
 113     memc_stat->total_connections= (uint32_t) strtoll(value, (char **)NULL, 10);
 114   }
 115   else if (!strcmp("connection_structures", key))
 116   {
 117     memc_stat->connection_structures= (uint32_t) strtol(value, (char **)NULL, 10);
 118   }
 119   else if (!strcmp("cmd_get", key))
 120   {
 121     memc_stat->cmd_get= (uint64_t) strtoll(value, (char **)NULL, 10);
 122   }
 123   else if (!strcmp("cmd_set", key))
 124   {
 125     memc_stat->cmd_set= (uint64_t) strtoll(value, (char **)NULL, 10);
 126   }
 127   else if (!strcmp("get_hits", key))
 128   {
 129     memc_stat->get_hits= (uint64_t) strtoll(value, (char **)NULL, 10);
 130   }
 131   else if (!strcmp("get_misses", key))
 132   {
 133     memc_stat->get_misses= (uint64_t)strtoll(value, (char **)NULL, 10);
 134   }
 135   else if (!strcmp("evictions", key))
 136   {
 137     memc_stat->evictions= (uint64_t)strtoll(value, (char **)NULL, 10);
 138   }
 139   else if (!strcmp("limit_maxbytes", key))
 140   {
 141     memc_stat->limit_maxbytes= (uint64_t) strtoll(value, (char **)NULL, 10);
 142   }
 143   else if (!strcmp("threads", key))
 144   {
 145     memc_stat->threads= (uint32_t) strtol(value, (char **)NULL, 10);
 146   }
 147   else if (!(strcmp("delete_misses", key) == 0 ||/* New stats in the 1.3 beta */
 148              strcmp("delete_hits", key) == 0 ||/* Just swallow them for now.. */
 149              strcmp("incr_misses", key) == 0 ||
 150              strcmp("incr_hits", key) == 0 ||
 151              strcmp("decr_misses", key) == 0 ||
 152              strcmp("decr_hits", key) == 0 ||
 153              strcmp("cas_misses", key) == 0 ||
 154              strcmp("cas_hits", key) == 0 ||
 155              strcmp("cas_badval", key) == 0 ||
 156              strcmp("cmd_flush", key) == 0 ||
 157              strcmp("accepting_conns", key) == 0 ||
 158              strcmp("listen_disabled_num", key) == 0 ||
 159              strcmp("conn_yields", key) == 0 ||
 160              strcmp("auth_cmds", key) == 0 ||
 161              strcmp("auth_errors", key) == 0 ||
 162              strcmp("reclaimed", key) == 0))
 163   {
 164     WATCHPOINT_STRING(key);
 165     return MEMCACHED_UNKNOWN_STAT_KEY;
 166   }
 167
 168   return MEMCACHED_SUCCESS;
 169 }
 170
 171 char *memcached_stat_get_value(const memcached_st *ptr, memcached_stat_st *memc_stat,
 172                                const char *key, memcached_return_t *error)
 173 {
 174   char buffer[SMALL_STRING_LEN];
 175   int length;
 176   char *ret;
 177
 178   *error= MEMCACHED_SUCCESS;
 179
 180   if (!memcmp("pid", key, strlen("pid")))
 181     length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->pid);
 182   else if (!memcmp("uptime", key, strlen("uptime")))
 183     length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->uptime);
 184   else if (!memcmp("time", key, strlen("time")))
 185     length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->time);
 186   else if (!memcmp("version", key, strlen("version")))
 187     length= snprintf(buffer, SMALL_STRING_LEN,"%s", memc_stat->version);
 188   else if (!memcmp("pointer_size", key, strlen("pointer_size")))
 189     length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->pointer_size);
 190   else if (!memcmp("rusage_user", key, strlen("rusage_user")))
 191     length= snprintf(buffer, SMALL_STRING_LEN,"%u.%u", memc_stat->rusage_user_seconds, memc_stat->rusage_user_microseconds);
 192   else if (!memcmp("rusage_system", key, strlen("rusage_system")))
 193     length= snprintf(buffer, SMALL_STRING_LEN,"%u.%u", memc_stat->rusage_system_seconds, memc_stat->rusage_system_microseconds);
 194   else if (!memcmp("curr_items", key, strlen("curr_items")))
 195     length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->curr_items);
 196   else if (!memcmp("total_items", key, strlen("total_items")))
 197     length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->total_items);
 198   else if (!memcmp("curr_connections", key, strlen("curr_connections")))
 199     length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->curr_connections);
 200   else if (!memcmp("total_connections", key, strlen("total_connections")))
 201     length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->total_connections);
 202   else if (!memcmp("connection_structures", key, strlen("connection_structures")))
 203     length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->connection_structures);
 204   else if (!memcmp("cmd_get", key, strlen("cmd_get")))
 205     length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->cmd_get);
 206   else if (!memcmp("cmd_set", key, strlen("cmd_set")))
 207     length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->cmd_set);
 208   else if (!memcmp("get_hits", key, strlen("get_hits")))
 209     length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->get_hits);
 210   else if (!memcmp("get_misses", key, strlen("get_misses")))
 211     length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->get_misses);
 212   else if (!memcmp("evictions", key, strlen("evictions")))
 213     length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->evictions);
 214   else if (!memcmp("bytes_read", key, strlen("bytes_read")))
 215     length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->bytes_read);
 216   else if (!memcmp("bytes_written", key, strlen("bytes_written")))
 217     length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->bytes_written);
 218   else if (!memcmp("bytes", key, strlen("bytes")))
 219     length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->bytes);
 220   else if (!memcmp("limit_maxbytes", key, strlen("limit_maxbytes")))
 221     length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->limit_maxbytes);
 222   else if (!memcmp("threads", key, strlen("threads")))
 223     length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->threads);
 224   else
 225   {
 226     *error= MEMCACHED_NOTFOUND;
 227     return NULL;
 228   }
 229
 230   ret= libmemcached_malloc(ptr, (size_t) (length + 1));
 231   memcpy(ret, buffer, (size_t) length);
 232   ret[length]= '\0';
 233
 234   return ret;
 235 }
 236
 237 static memcached_return_t binary_stats_fetch(memcached_stat_st *memc_stat,
 238                                              const char *args,
 239                                              memcached_server_write_instance_st instance,
 240                                              struct local_context *check)
 241 {
 242   memcached_return_t rc;
 243
 244   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
 245   protocol_binary_request_stats request= {.bytes= {0}};
 246   request.message.header.request.magic= PROTOCOL_BINARY_REQ;
 247   request.message.header.request.opcode= PROTOCOL_BINARY_CMD_STAT;
 248   request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
 249
 250   if (args != NULL)
 251   {
 252     size_t len= strlen(args);
 253
 254     rc= memcached_validate_key_length(len, true);
 255     unlikely (rc != MEMCACHED_SUCCESS)
 256       return rc;
 257
 258     request.message.header.request.keylen= htons((uint16_t)len);
 259     request.message.header.request.bodylen= htonl((uint32_t) len);
 260
 261     struct __write_vector_st vector[]=
 262     {
 263       { .length= sizeof(request.bytes), .buffer= request.bytes },
 264       { .length= len, .buffer= args }
 265     };
 266
 267     if (memcached_vdo(instance, vector, 2, true) != MEMCACHED_SUCCESS)
 268     {
 269       memcached_io_reset(instance);
 270       return MEMCACHED_WRITE_FAILURE;
 271     }
 272   }
 273   else
 274   {
 275     if (memcached_do(instance, request.bytes,
 276                      sizeof(request.bytes), true) != MEMCACHED_SUCCESS)
 277     {
 278       memcached_io_reset(instance);
 279       return MEMCACHED_WRITE_FAILURE;
 280     }
 281   }
 282
 283   memcached_server_response_decrement(instance);
 284   do
 285   {
 286     rc= memcached_response(instance, buffer, sizeof(buffer), NULL);
 287
 288     if (rc == MEMCACHED_END)
 289       break;
 290
 291     unlikely (rc != MEMCACHED_SUCCESS)
 292     {
 293       memcached_io_reset(instance);
 294       return rc;
 295     }
 296
 297     if (memc_stat)
 298     {
 299       unlikely((set_data(memc_stat, buffer, buffer + strlen(buffer) + 1)) == MEMCACHED_UNKNOWN_STAT_KEY)
 300       {
 301         WATCHPOINT_ERROR(MEMCACHED_UNKNOWN_STAT_KEY);
 302         WATCHPOINT_ASSERT(0);
 303       }
 304     }
 305
 306     if (check && check->func)
 307     {
 308       size_t key_length= strlen(buffer);
 309
 310       check->func(instance,
 311                   buffer, key_length,
 312                   buffer+key_length+1, strlen(buffer+key_length+1),
 313                   check->context);
 314     }
 315   } while (1);
 316
 317   /* shit... memcached_response will decrement the counter, so I need to
 318    ** reset it.. todo: look at this and try to find a better solution.
 319  */
 320   instance->cursor_active= 0;
 321
 322   return MEMCACHED_SUCCESS;
 323 }
 324
 325 static memcached_return_t ascii_stats_fetch(memcached_stat_st *memc_stat,
 326                                             const char *args,
 327                                             memcached_server_write_instance_st instance,
 328                                             struct local_context *check)
 329 {
 330   memcached_return_t rc;
 331   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
 332   size_t send_length;
 333
 334   if (args)
 335     send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
 336                                    "stats %s\r\n", args);
 337   else
 338     send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
 339                                    "stats\r\n");
 340
 341   if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
 342     return MEMCACHED_WRITE_FAILURE;
 343
 344   rc= memcached_do(instance, buffer, send_length, true);
 345   if (rc != MEMCACHED_SUCCESS)
 346     goto error;
 347
 348   while (1)
 349   {
 350     rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
 351
 352     if (rc == MEMCACHED_STAT)
 353     {
 354       char *string_ptr, *end_ptr;
 355       char *key, *value;
 356
 357       string_ptr= buffer;
 358       string_ptr+= 5; /* Move past STAT */
 359       for (end_ptr= string_ptr; isgraph(*end_ptr); end_ptr++);
 360       key= string_ptr;
 361       key[(size_t)(end_ptr-string_ptr)]= 0;
 362
 363       string_ptr= end_ptr + 1;
 364       for (end_ptr= string_ptr; !(isspace(*end_ptr)); end_ptr++);
 365       value= string_ptr;
 366       value[(size_t)(end_ptr-string_ptr)]= 0;
 367       string_ptr= end_ptr + 2;
 368       if (memc_stat)
 369       {
 370         unlikely((set_data(memc_stat, key, value)) == MEMCACHED_UNKNOWN_STAT_KEY)
 371         {
 372           WATCHPOINT_ERROR(MEMCACHED_UNKNOWN_STAT_KEY);
 373           WATCHPOINT_ASSERT(0);
 374         }
 375       }
 376
 377       if (check && check->func)
 378       {
 379         check->func(instance,
 380                     key, strlen(key),
 381                     value, strlen(value),
 382                     check->context);
 383       }
 384     }
 385     else
 386       break;
 387   }
 388
 389 error:
 390   if (rc == MEMCACHED_END)
 391     return MEMCACHED_SUCCESS;
 392   else
 393     return rc;
 394 }
 395
 396 memcached_stat_st *memcached_stat(memcached_st *ptr, char *args, memcached_return_t *error)
 397 {
 398   memcached_return_t rc;
 399   memcached_stat_st *stats;
 400
 401   unlikely (ptr->flags.use_udp)
 402   {
 403     *error= MEMCACHED_NOT_SUPPORTED;
 404     return NULL;
 405   }
 406
 407   stats= libmemcached_calloc(ptr, memcached_server_count(ptr), sizeof(memcached_stat_st));
 408
 409   if (! stats)
 410   {
 411     *error= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
 412     return NULL;
 413   }
 414
 415   rc= MEMCACHED_SUCCESS;
 416   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
 417   {
 418     memcached_return_t temp_return;
 419     memcached_server_write_instance_st instance;
 420     memcached_stat_st *stat_instance;
 421
 422     stat_instance= stats + x;
 423
 424     stat_instance->root= ptr;
 425
 426     instance= memcached_server_instance_fetch(ptr, x);
 427
 428     if (ptr->flags.binary_protocol)
 429     {
 430       temp_return= binary_stats_fetch(stat_instance, args, instance, NULL);
 431     }
 432     else
 433     {
 434       temp_return= ascii_stats_fetch(stat_instance, args, instance, NULL);
 435     }
 436
 437     if (temp_return != MEMCACHED_SUCCESS)
 438       rc= MEMCACHED_SOME_ERRORS;
 439   }
 440
 441   *error= rc;
 442   return stats;
 443 }
 444
 445 memcached_return_t memcached_stat_servername(memcached_stat_st *memc_stat, char *args,
 446                                              const char *hostname, in_port_t port)
 447 {
 448   memcached_return_t rc;
 449   memcached_st memc;
 450   memcached_st *memc_ptr;
 451   memcached_server_write_instance_st instance;
 452
 453   memset(memc_stat, 0, sizeof(memcached_stat_st));
 454
 455   memc_ptr= memcached_create(&memc);
 456   WATCHPOINT_ASSERT(memc_ptr);
 457
 458   memcached_server_add(&memc, hostname, port);
 459
 460   instance= memcached_server_instance_fetch(memc_ptr, 0);
 461
 462   if (memc.flags.binary_protocol)
 463   {
 464     rc= binary_stats_fetch(memc_stat, args, instance, NULL);
 465   }
 466   else
 467   {
 468     rc= ascii_stats_fetch(memc_stat, args, instance, NULL);
 469   }
 470
 471   memcached_free(&memc);
 472
 473   return rc;
 474 }
 475
 476 /*
 477   We make a copy of the keys since at some point in the not so distant future
 478   we will add support for "found" keys.
 479 */
 480 char ** memcached_stat_get_keys(const memcached_st *ptr,
 481                                 memcached_stat_st *memc_stat,
 482                                 memcached_return_t *error)
 483 {
 484   char **list;
 485   size_t length= sizeof(memcached_stat_keys);
 486
 487   (void)memc_stat;
 488
 489   list= libmemcached_malloc(ptr, length);
 490
 491   if (! list)
 492   {
 493     *error= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
 494     return NULL;
 495   }
 496
 497   memcpy(list, memcached_stat_keys, sizeof(memcached_stat_keys));
 498
 499   *error= MEMCACHED_SUCCESS;
 500
 501   return list;
 502 }
 503
 504 void memcached_stat_free(const memcached_st *ptr, memcached_stat_st *memc_stat)
 505 {
 506   if (memc_stat == NULL)
 507   {
 508     WATCHPOINT_ASSERT(0); /* Be polite, but when debugging catch this as an error */
 509     return;
 510   }
 511
 512   if (memc_stat->root)
 513   {
 514     libmemcached_free(memc_stat->root, memc_stat);
 515   }
 516   else if (ptr)
 517   {
 518     libmemcached_free(ptr, memc_stat);
 519   }
 520   else
 521   {
 522     free(memc_stat);
 523   }
 524 }
 525
 526 static memcached_return_t call_stat_fn(memcached_st *ptr,
 527                                        memcached_server_write_instance_st instance,
 528                                        void *context)
 529 {
 530   memcached_return_t rc;
 531   struct local_context *check= (struct local_context *)context;
 532
 533   if (ptr->flags.binary_protocol)
 534   {
 535     rc= binary_stats_fetch(NULL, check->args, instance, check);
 536   }
 537   else
 538   {
 539     rc= ascii_stats_fetch(NULL, check->args, instance, check);
 540   }
 541
 542   return rc;
 543 }
 544
 545 memcached_return_t memcached_stat_execute(memcached_st *memc, const char *args,  memcached_stat_fn func, void *context)
 546 {
 547   memcached_version(memc);
 548
 549  struct local_context check= { .func= func, .context= context, .args= args };
 550
 551  return memcached_server_execute(memc, call_stat_fn, (void *)&check);
 552 }