git.m6w6.name Git - m6w6/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   if (length >= SMALL_STRING_LEN || length < 0)
 231   {
 232     *error= MEMCACHED_FAILURE;
 233     return NULL;
 234   }
 235
 236   ret= libmemcached_malloc(ptr, (size_t) (length + 1));
 237   memcpy(ret, buffer, (size_t) length);
 238   ret[length]= '\0';
 239
 240   return ret;
 241 }
 242
 243 static memcached_return_t binary_stats_fetch(memcached_stat_st *memc_stat,
 244                                              const char *args,
 245                                              memcached_server_write_instance_st instance,
 246                                              struct local_context *check)
 247 {
 248   memcached_return_t rc;
 249
 250   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
 251   protocol_binary_request_stats request= {.bytes= {0}};
 252   request.message.header.request.magic= PROTOCOL_BINARY_REQ;
 253   request.message.header.request.opcode= PROTOCOL_BINARY_CMD_STAT;
 254   request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
 255
 256   if (args != NULL)
 257   {
 258     size_t len= strlen(args);
 259
 260     rc= memcached_validate_key_length(len, true);
 261     unlikely (rc != MEMCACHED_SUCCESS)
 262       return rc;
 263
 264     request.message.header.request.keylen= htons((uint16_t)len);
 265     request.message.header.request.bodylen= htonl((uint32_t) len);
 266
 267     struct libmemcached_io_vector_st vector[]=
 268     {
 269       { .length= sizeof(request.bytes), .buffer= request.bytes },
 270       { .length= len, .buffer= args }
 271     };
 272
 273     if (memcached_vdo(instance, vector, 2, true) != MEMCACHED_SUCCESS)
 274     {
 275       memcached_io_reset(instance);
 276       return MEMCACHED_WRITE_FAILURE;
 277     }
 278   }
 279   else
 280   {
 281     if (memcached_do(instance, request.bytes,
 282                      sizeof(request.bytes), true) != MEMCACHED_SUCCESS)
 283     {
 284       memcached_io_reset(instance);
 285       return MEMCACHED_WRITE_FAILURE;
 286     }
 287   }
 288
 289   memcached_server_response_decrement(instance);
 290   do
 291   {
 292     rc= memcached_response(instance, buffer, sizeof(buffer), NULL);
 293
 294     if (rc == MEMCACHED_END)
 295       break;
 296
 297     unlikely (rc != MEMCACHED_SUCCESS)
 298     {
 299       memcached_io_reset(instance);
 300       return rc;
 301     }
 302
 303     if (memc_stat)
 304     {
 305       unlikely((set_data(memc_stat, buffer, buffer + strlen(buffer) + 1)) == MEMCACHED_UNKNOWN_STAT_KEY)
 306       {
 307         WATCHPOINT_ERROR(MEMCACHED_UNKNOWN_STAT_KEY);
 308         WATCHPOINT_ASSERT(0);
 309       }
 310     }
 311
 312     if (check && check->func)
 313     {
 314       size_t key_length= strlen(buffer);
 315
 316       check->func(instance,
 317                   buffer, key_length,
 318                   buffer+key_length+1, strlen(buffer+key_length+1),
 319                   check->context);
 320     }
 321   } while (1);
 322
 323   /* shit... memcached_response will decrement the counter, so I need to
 324    ** reset it.. todo: look at this and try to find a better solution.
 325  */
 326   instance->cursor_active= 0;
 327
 328   return MEMCACHED_SUCCESS;
 329 }
 330
 331 static memcached_return_t ascii_stats_fetch(memcached_stat_st *memc_stat,
 332                                             const char *args,
 333                                             memcached_server_write_instance_st instance,
 334                                             struct local_context *check)
 335 {
 336   memcached_return_t rc;
 337   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
 338   int send_length;
 339
 340   if (args)
 341     send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
 342                                    "stats %s\r\n", args);
 343   else
 344     send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
 345                                    "stats\r\n");
 346
 347   if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE || send_length < 0)
 348     return MEMCACHED_WRITE_FAILURE;
 349
 350   rc= memcached_do(instance, buffer, (size_t)send_length, true);
 351   if (rc != MEMCACHED_SUCCESS)
 352     goto error;
 353
 354   while (1)
 355   {
 356     rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
 357
 358     if (rc == MEMCACHED_STAT)
 359     {
 360       char *string_ptr, *end_ptr;
 361       char *key, *value;
 362
 363       string_ptr= buffer;
 364       string_ptr+= 5; /* Move past STAT */
 365       for (end_ptr= string_ptr; isgraph(*end_ptr); end_ptr++);
 366       key= string_ptr;
 367       key[(size_t)(end_ptr-string_ptr)]= 0;
 368
 369       string_ptr= end_ptr + 1;
 370       for (end_ptr= string_ptr; !(isspace(*end_ptr)); end_ptr++);
 371       value= string_ptr;
 372       value[(size_t)(end_ptr-string_ptr)]= 0;
 373       string_ptr= end_ptr + 2;
 374       if (memc_stat)
 375       {
 376         unlikely((set_data(memc_stat, key, value)) == MEMCACHED_UNKNOWN_STAT_KEY)
 377         {
 378           WATCHPOINT_ERROR(MEMCACHED_UNKNOWN_STAT_KEY);
 379           WATCHPOINT_ASSERT(0);
 380         }
 381       }
 382
 383       if (check && check->func)
 384       {
 385         check->func(instance,
 386                     key, strlen(key),
 387                     value, strlen(value),
 388                     check->context);
 389       }
 390     }
 391     else
 392       break;
 393   }
 394
 395 error:
 396   if (rc == MEMCACHED_END)
 397     return MEMCACHED_SUCCESS;
 398   else
 399     return rc;
 400 }
 401
 402 memcached_stat_st *memcached_stat(memcached_st *ptr, char *args, memcached_return_t *error)
 403 {
 404   memcached_return_t rc;
 405   memcached_stat_st *stats;
 406
 407   unlikely (ptr->flags.use_udp)
 408   {
 409     *error= MEMCACHED_NOT_SUPPORTED;
 410     return NULL;
 411   }
 412
 413   stats= libmemcached_calloc(ptr, memcached_server_count(ptr), sizeof(memcached_stat_st));
 414
 415   if (! stats)
 416   {
 417     *error= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
 418     return NULL;
 419   }
 420
 421   rc= MEMCACHED_SUCCESS;
 422   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
 423   {
 424     memcached_return_t temp_return;
 425     memcached_server_write_instance_st instance;
 426     memcached_stat_st *stat_instance;
 427
 428     stat_instance= stats + x;
 429
 430     stat_instance->root= ptr;
 431
 432     instance= memcached_server_instance_fetch(ptr, x);
 433
 434     if (ptr->flags.binary_protocol)
 435     {
 436       temp_return= binary_stats_fetch(stat_instance, args, instance, NULL);
 437     }
 438     else
 439     {
 440       temp_return= ascii_stats_fetch(stat_instance, args, instance, NULL);
 441     }
 442
 443     if (temp_return != MEMCACHED_SUCCESS)
 444       rc= MEMCACHED_SOME_ERRORS;
 445   }
 446
 447   *error= rc;
 448   return stats;
 449 }
 450
 451 memcached_return_t memcached_stat_servername(memcached_stat_st *memc_stat, char *args,
 452                                              const char *hostname, in_port_t port)
 453 {
 454   memcached_return_t rc;
 455   memcached_st memc;
 456   memcached_st *memc_ptr;
 457   memcached_server_write_instance_st instance;
 458
 459   memset(memc_stat, 0, sizeof(memcached_stat_st));
 460
 461   memc_ptr= memcached_create(&memc);
 462   WATCHPOINT_ASSERT(memc_ptr);
 463
 464   memcached_server_add(&memc, hostname, port);
 465
 466   instance= memcached_server_instance_fetch(memc_ptr, 0);
 467
 468   if (memc.flags.binary_protocol)
 469   {
 470     rc= binary_stats_fetch(memc_stat, args, instance, NULL);
 471   }
 472   else
 473   {
 474     rc= ascii_stats_fetch(memc_stat, args, instance, NULL);
 475   }
 476
 477   memcached_free(&memc);
 478
 479   return rc;
 480 }
 481
 482 /*
 483   We make a copy of the keys since at some point in the not so distant future
 484   we will add support for "found" keys.
 485 */
 486 char ** memcached_stat_get_keys(const memcached_st *ptr,
 487                                 memcached_stat_st *memc_stat,
 488                                 memcached_return_t *error)
 489 {
 490   char **list;
 491   size_t length= sizeof(memcached_stat_keys);
 492
 493   (void)memc_stat;
 494
 495   list= libmemcached_malloc(ptr, length);
 496
 497   if (! list)
 498   {
 499     *error= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
 500     return NULL;
 501   }
 502
 503   memcpy(list, memcached_stat_keys, sizeof(memcached_stat_keys));
 504
 505   *error= MEMCACHED_SUCCESS;
 506
 507   return list;
 508 }
 509
 510 void memcached_stat_free(const memcached_st *ptr, memcached_stat_st *memc_stat)
 511 {
 512   if (memc_stat == NULL)
 513   {
 514     WATCHPOINT_ASSERT(0); /* Be polite, but when debugging catch this as an error */
 515     return;
 516   }
 517
 518   if (memc_stat->root)
 519   {
 520     libmemcached_free(memc_stat->root, memc_stat);
 521   }
 522   else if (ptr)
 523   {
 524     libmemcached_free(ptr, memc_stat);
 525   }
 526   else
 527   {
 528     free(memc_stat);
 529   }
 530 }
 531
 532 static memcached_return_t call_stat_fn(memcached_st *ptr,
 533                                        memcached_server_write_instance_st instance,
 534                                        void *context)
 535 {
 536   memcached_return_t rc;
 537   struct local_context *check= (struct local_context *)context;
 538
 539   if (ptr->flags.binary_protocol)
 540   {
 541     rc= binary_stats_fetch(NULL, check->args, instance, check);
 542   }
 543   else
 544   {
 545     rc= ascii_stats_fetch(NULL, check->args, instance, check);
 546   }
 547
 548   return rc;
 549 }
 550
 551 memcached_return_t memcached_stat_execute(memcached_st *memc, const char *args,  memcached_stat_fn func, void *context)
 552 {
 553   memcached_version(memc);
 554
 555  struct local_context check= { .func= func, .context= context, .args= args };
 556
 557  return memcached_server_execute(memc, call_stat_fn, (void *)&check);
 558 }