git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached/behavior.c

   1 /* LibMemcached
   2  * Copyright (C) 2006-2009 Brian Aker
   3  * All rights reserved.
   4  *
   5  * Use and distribution licensed under the BSD license.  See
   6  * the COPYING file in the parent directory for full text.
   7  *
   8  * Summary: Change the behavior of the memcached connection.
   9  *
  10  */
  11
  12 #include "common.h"
  13 #include <time.h>
  14 #include <sys/types.h>
  15 #include <sys/socket.h>
  16 #include <netinet/tcp.h>
  17
  18 static bool set_flag(uint64_t data)
  19 {
  20   // Wordy :)
  21   return data ? true : false;
  22 }
  23
  24 static memcached_return_t set_hash(memcached_hash_t *store, memcached_hash_t type)
  25 {
  26 #ifndef HAVE_HSIEH_HASH
  27   if (type == MEMCACHED_HASH_HSIEH)
  28     return MEMCACHED_FAILURE;
  29 #endif
  30   if (type < MEMCACHED_HASH_MAX)
  31   {
  32     *store= type;
  33   }
  34   else
  35   {
  36     return MEMCACHED_FAILURE;
  37   }
  38
  39   return MEMCACHED_SUCCESS;
  40 }
  41 /*
  42   This function is used to modify the behavior of running client.
  43
  44   We quit all connections so we can reset the sockets.
  45 */
  46
  47 memcached_return_t memcached_behavior_set(memcached_st *ptr,
  48                                           const memcached_behavior_t flag,
  49                                           uint64_t data)
  50 {
  51   switch (flag)
  52   {
  53   case MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICAS:
  54     ptr->number_of_replicas= (uint32_t)data;
  55     break;
  56   case MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK:
  57     ptr->io_msg_watermark= (uint32_t) data;
  58     break;
  59   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
  60     ptr->io_bytes_watermark= (uint32_t)data;
  61     break;
  62   case MEMCACHED_BEHAVIOR_IO_KEY_PREFETCH:
  63     ptr->io_key_prefetch = (uint32_t)data;
  64     break;
  65   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
  66     ptr->snd_timeout= (int32_t)data;
  67     break;
  68   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
  69     ptr->rcv_timeout= (int32_t)data;
  70     break;
  71   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
  72     ptr->server_failure_limit= (uint32_t)data;
  73     break;
  74   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
  75     if (data)
  76     {
  77       ptr->flags.verify_key= false;
  78     }
  79     ptr->flags.binary_protocol= set_flag(data);
  80     break;
  81   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
  82     ptr->flags.support_cas= set_flag(data);
  83     break;
  84   case MEMCACHED_BEHAVIOR_NO_BLOCK:
  85     ptr->flags.no_block= set_flag(data);
  86     memcached_quit(ptr);
  87     break;
  88   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
  89     ptr->flags.buffer_requests= set_flag(data);
  90     memcached_quit(ptr);
  91     break;
  92   case MEMCACHED_BEHAVIOR_USE_UDP:
  93     if (ptr->number_of_hosts)
  94     {
  95       return MEMCACHED_FAILURE;
  96     }
  97     ptr->flags.use_udp= set_flag(data);
  98     if (data)
  99     {
 100       ptr->flags.no_reply= set_flag(data);
 101     }
 102     break;
 103   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
 104     ptr->flags.tcp_nodelay= set_flag(data);
 105     memcached_quit(ptr);
 106     break;
 107   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
 108     return memcached_behavior_set_distribution(ptr, (memcached_server_distribution_t)data);
 109   case MEMCACHED_BEHAVIOR_KETAMA:
 110     {
 111       if (data)
 112       {
 113         (void)memcached_behavior_set_key_hash(ptr, MEMCACHED_HASH_MD5);
 114         (void)memcached_behavior_set_distribution_hash(ptr, MEMCACHED_HASH_MD5);
 115         (void)memcached_behavior_set_distribution(ptr, MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA);
 116       }
 117       else
 118       {
 119         (void)memcached_behavior_set_key_hash(ptr, MEMCACHED_HASH_DEFAULT);
 120         (void)memcached_behavior_set_distribution_hash(ptr, MEMCACHED_HASH_DEFAULT);
 121         (void)memcached_behavior_set_distribution(ptr, MEMCACHED_DISTRIBUTION_MODULA);
 122       }
 123
 124       break;
 125     }
 126   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
 127     {
 128       (void)memcached_behavior_set_key_hash(ptr, MEMCACHED_HASH_MD5);
 129       (void)memcached_behavior_set_distribution_hash(ptr, MEMCACHED_HASH_MD5);
 130       ptr->flags.ketama_weighted= set_flag(data);
 131       /**
 132         @note We try to keep the same distribution going. This should be deprecated and rewritten.
 133       */
 134       return memcached_behavior_set_distribution(ptr, MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA);
 135     }
 136   case MEMCACHED_BEHAVIOR_HASH:
 137     return memcached_behavior_set_key_hash(ptr, (memcached_hash_t)(data));
 138   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 139     return memcached_behavior_set_distribution_hash(ptr, (memcached_hash_t)(data));
 140   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 141     ptr->flags.use_cache_lookups= set_flag(data);
 142     memcached_quit(ptr);
 143     break;
 144   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 145     if (ptr->flags.binary_protocol)
 146       return MEMCACHED_FAILURE;
 147     ptr->flags.verify_key= set_flag(data);
 148     break;
 149   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 150     {
 151       ptr->flags.use_sort_hosts= set_flag(data);
 152       run_distribution(ptr);
 153
 154       break;
 155     }
 156   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 157     ptr->poll_timeout= (int32_t)data;
 158     break;
 159   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 160     ptr->connect_timeout= (int32_t)data;
 161     break;
 162   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 163     ptr->retry_timeout= (int32_t)data;
 164     break;
 165   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 166     ptr->send_size= (int32_t)data;
 167     memcached_quit(ptr);
 168     break;
 169   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 170     ptr->recv_size= (int32_t)data;
 171     memcached_quit(ptr);
 172     break;
 173   case MEMCACHED_BEHAVIOR_USER_DATA:
 174     return MEMCACHED_FAILURE;
 175   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 176     ptr->flags.hash_with_prefix_key= set_flag(data);
 177     break;
 178   case MEMCACHED_BEHAVIOR_NOREPLY:
 179     ptr->flags.no_reply= set_flag(data);
 180     break;
 181   case MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS:
 182     ptr->flags.auto_eject_hosts= set_flag(data);
 183     break;
 184   case MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READ:
 185       srandom((uint32_t) time(NULL));
 186       ptr->flags.randomize_replica_read= set_flag(data);
 187       break;
 188   case MEMCACHED_BEHAVIOR_MAX:
 189   default:
 190     /* Shouldn't get here */
 191     WATCHPOINT_ASSERT(0);
 192     return MEMCACHED_FAILURE;
 193   }
 194
 195   return MEMCACHED_SUCCESS;
 196 }
 197
 198 uint64_t memcached_behavior_get(memcached_st *ptr,
 199                                 const memcached_behavior_t flag)
 200 {
 201   switch (flag)
 202   {
 203   case MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICAS:
 204     return ptr->number_of_replicas;
 205   case MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK:
 206     return ptr->io_msg_watermark;
 207   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
 208     return ptr->io_bytes_watermark;
 209   case MEMCACHED_BEHAVIOR_IO_KEY_PREFETCH:
 210     return ptr->io_key_prefetch;
 211   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
 212     return ptr->flags.binary_protocol;
 213   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
 214     return ptr->flags.support_cas;
 215   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 216     return ptr->flags.use_cache_lookups;
 217   case MEMCACHED_BEHAVIOR_NO_BLOCK:
 218     return ptr->flags.no_block;
 219   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
 220     return ptr->flags.buffer_requests;
 221   case MEMCACHED_BEHAVIOR_USE_UDP:
 222     return ptr->flags.use_udp;
 223   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
 224     return ptr->flags.tcp_nodelay;
 225   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 226     return ptr->flags.verify_key;
 227   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
 228     return ptr->flags.ketama_weighted;
 229   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
 230     return ptr->distribution;
 231   case MEMCACHED_BEHAVIOR_KETAMA:
 232     return (ptr->distribution == MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA) ? (uint64_t) 1 : 0;
 233   case MEMCACHED_BEHAVIOR_HASH:
 234     return ptr->hash;
 235   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 236     return ptr->distribution_hash;
 237   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
 238     return ptr->server_failure_limit;
 239   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 240     return ptr->flags.use_sort_hosts;
 241   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 242     return (uint64_t)ptr->poll_timeout;
 243   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 244     return (uint64_t)ptr->connect_timeout;
 245   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 246     return (uint64_t)ptr->retry_timeout;
 247   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
 248     return (uint64_t)ptr->snd_timeout;
 249   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
 250     return (uint64_t)ptr->rcv_timeout;
 251   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 252     {
 253       int sock_size;
 254       socklen_t sock_length= sizeof(int);
 255
 256       /* REFACTOR */
 257       /* We just try the first host, and if it is down we return zero */
 258       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 259         return 0;
 260
 261       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 262                      SO_SNDBUF, &sock_size, &sock_length))
 263         return 0; /* Zero means error */
 264
 265       return (uint64_t) sock_size;
 266     }
 267   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 268     {
 269       int sock_size;
 270       socklen_t sock_length= sizeof(int);
 271
 272       /**
 273         @note REFACTOR
 274       */
 275       /* We just try the first host, and if it is down we return zero */
 276       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 277         return 0;
 278
 279       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 280                      SO_RCVBUF, &sock_size, &sock_length))
 281         return 0; /* Zero means error */
 282
 283       return (uint64_t) sock_size;
 284     }
 285   case MEMCACHED_BEHAVIOR_USER_DATA:
 286     return MEMCACHED_FAILURE;
 287   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 288     return ptr->flags.hash_with_prefix_key;
 289   case MEMCACHED_BEHAVIOR_NOREPLY:
 290     return ptr->flags.no_reply;
 291   case MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS:
 292     return ptr->flags.auto_eject_hosts;
 293   case MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READ:
 294     return ptr->flags.randomize_replica_read;
 295   case MEMCACHED_BEHAVIOR_MAX:
 296   default:
 297     WATCHPOINT_ASSERT(0); /* Programming mistake if it gets this far */
 298     return 0;
 299   }
 300
 301   /* NOTREACHED */
 302 }
 303
 304
 305 memcached_return_t memcached_behavior_set_distribution(memcached_st *ptr, memcached_server_distribution_t type)
 306 {
 307   if (type < MEMCACHED_DISTRIBUTION_CONSISTENT_MAX)
 308   {
 309     ptr->distribution= type;
 310     run_distribution(ptr);
 311   }
 312   else
 313   {
 314     return MEMCACHED_FAILURE;
 315   }
 316
 317   return MEMCACHED_SUCCESS;
 318 }
 319
 320
 321 memcached_server_distribution_t memcached_behavior_get_distribution(memcached_st *ptr)
 322 {
 323   return ptr->distribution;
 324 }
 325
 326 memcached_return_t memcached_behavior_set_key_hash(memcached_st *ptr, memcached_hash_t type)
 327 {
 328   return set_hash(&ptr->hash, type);
 329 }
 330
 331 memcached_hash_t memcached_behavior_get_key_hash(memcached_st *ptr)
 332 {
 333   return ptr->hash;
 334 }
 335
 336 memcached_return_t memcached_behavior_set_distribution_hash(memcached_st *ptr, memcached_hash_t type)
 337 {
 338   return set_hash(&ptr->distribution_hash, type);
 339 }
 340
 341 memcached_hash_t memcached_behavior_get_distribution_hash(memcached_st *ptr)
 342 {
 343   return ptr->distribution_hash;
 344 }