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