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

   1 #include "common.h"
   2 #include <time.h>
   3 #include <sys/types.h>
   4 #include <sys/socket.h>
   5 #include <netinet/tcp.h>
   6
   7 /*
   8   This function is used to modify the behavior of running client.
   9
  10   We quit all connections so we can reset the sockets.
  11 */
  12
  13 static void set_behavior_flag(memcached_st *ptr, memcached_flags temp_flag, uint64_t data)
  14 {
  15   if (data)
  16     ptr->flags|= temp_flag;
  17   else
  18     ptr->flags&= ~temp_flag;
  19 }
  20
  21 memcached_return memcached_behavior_set(memcached_st *ptr,
  22                                         memcached_behavior flag,
  23                                         uint64_t data)
  24 {
  25   switch (flag)
  26   {
  27   case MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICAS:
  28     ptr->number_of_replicas= (uint32_t)data;
  29     break;
  30   case MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK:
  31     ptr->io_msg_watermark= (uint32_t) data;
  32     break;
  33   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
  34     ptr->io_bytes_watermark= (uint32_t)data;
  35     break;
  36   case MEMCACHED_BEHAVIOR_IO_KEY_PREFETCH:
  37     ptr->io_key_prefetch = (uint32_t)data;
  38     break;
  39   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
  40     ptr->snd_timeout= (int32_t)data;
  41     break;
  42   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
  43     ptr->rcv_timeout= (int32_t)data;
  44     break;
  45   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
  46     ptr->server_failure_limit= (uint32_t)data;
  47     break;
  48   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
  49     if (data)
  50         set_behavior_flag(ptr, MEM_VERIFY_KEY, 0);
  51     set_behavior_flag(ptr, MEM_BINARY_PROTOCOL, data);
  52     break;
  53   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
  54     set_behavior_flag(ptr, MEM_SUPPORT_CAS, data);
  55     break;
  56   case MEMCACHED_BEHAVIOR_NO_BLOCK:
  57     set_behavior_flag(ptr, MEM_NO_BLOCK, data);
  58     memcached_quit(ptr);
  59     break;
  60   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
  61     set_behavior_flag(ptr, MEM_BUFFER_REQUESTS, data);
  62     memcached_quit(ptr);
  63     break;
  64   case MEMCACHED_BEHAVIOR_USE_UDP:
  65     if (ptr->number_of_hosts)
  66       return MEMCACHED_FAILURE;
  67     set_behavior_flag(ptr, MEM_USE_UDP, data);
  68     if (data)
  69       set_behavior_flag(ptr,MEM_NOREPLY,data);
  70     break;
  71   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
  72     set_behavior_flag(ptr, MEM_TCP_NODELAY, data);
  73     memcached_quit(ptr);
  74     break;
  75   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
  76     {
  77       ptr->distribution= (memcached_server_distribution)(data);
  78       if (ptr->distribution == MEMCACHED_DISTRIBUTION_RANDOM)
  79       {
  80         srandom((uint32_t) time(NULL));
  81       }
  82       run_distribution(ptr);
  83       break;
  84     }
  85   case MEMCACHED_BEHAVIOR_KETAMA:
  86     {
  87       if (data)
  88       {
  89         ptr->hash= MEMCACHED_HASH_MD5;
  90         ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
  91       }
  92       else
  93       {
  94         ptr->hash= 0;
  95         ptr->distribution= 0;
  96       }
  97       run_distribution(ptr);
  98       break;
  99     }
 100   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
 101     {
 102       ptr->hash= MEMCACHED_HASH_MD5;
 103       ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
 104       set_behavior_flag(ptr, MEM_KETAMA_WEIGHTED, data);
 105       run_distribution(ptr);
 106       break;
 107     }
 108   case MEMCACHED_BEHAVIOR_KETAMA_COMPAT_MODE:
 109     switch (data)
 110     {
 111     case MEMCACHED_KETAMA_COMPAT_LIBMEMCACHED:
 112       ptr->hash= MEMCACHED_HASH_MD5;
 113       ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
 114       break;
 115     case MEMCACHED_KETAMA_COMPAT_SPY:
 116       ptr->hash= MEMCACHED_HASH_MD5;
 117       ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA_SPY;
 118       break;
 119     default:
 120        return MEMCACHED_FAILURE;
 121     }
 122     run_distribution(ptr);
 123     break;
 124   case MEMCACHED_BEHAVIOR_HASH:
 125 #ifndef HAVE_HSIEH_HASH
 126     if ((memcached_hash)(data) == MEMCACHED_HASH_HSIEH)
 127       return MEMCACHED_FAILURE;
 128 #endif
 129     ptr->hash= (memcached_hash)(data);
 130     break;
 131   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 132     ptr->hash_continuum= (memcached_hash)(data);
 133     run_distribution(ptr);
 134     break;
 135   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 136     set_behavior_flag(ptr, MEM_USE_CACHE_LOOKUPS, data);
 137     memcached_quit(ptr);
 138     break;
 139   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 140     if (ptr->flags & MEM_BINARY_PROTOCOL)
 141         break;
 142     set_behavior_flag(ptr, MEM_VERIFY_KEY, data);
 143     break;
 144   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 145     {
 146       set_behavior_flag(ptr, MEM_USE_SORT_HOSTS, data);
 147       run_distribution(ptr);
 148
 149       break;
 150     }
 151   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 152     ptr->poll_timeout= (int32_t)data;
 153     break;
 154   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 155     ptr->connect_timeout= (int32_t)data;
 156     break;
 157   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 158     ptr->retry_timeout= (int32_t)data;
 159     break;
 160   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 161     ptr->send_size= (int32_t)data;
 162     memcached_quit(ptr);
 163     break;
 164   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 165     ptr->recv_size= (int32_t)data;
 166     memcached_quit(ptr);
 167     break;
 168   case MEMCACHED_BEHAVIOR_USER_DATA:
 169     return MEMCACHED_FAILURE;
 170   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 171     set_behavior_flag(ptr, MEM_HASH_WITH_PREFIX_KEY, data);
 172     break;
 173   case MEMCACHED_BEHAVIOR_NOREPLY:
 174     set_behavior_flag(ptr, MEM_NOREPLY, data);
 175     break;
 176   case MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS:
 177     set_behavior_flag(ptr, MEM_AUTO_EJECT_HOSTS, data);
 178     break;
 179     case MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READ:
 180       set_behavior_flag(ptr, MEM_RANDOMIZE_REPLICA_READ, data);
 181       break;
 182   default:
 183     /* Shouldn't get here */
 184     WATCHPOINT_ASSERT(flag);
 185     break;
 186   }
 187
 188   return MEMCACHED_SUCCESS;
 189 }
 190
 191 uint64_t memcached_behavior_get(memcached_st *ptr,
 192                                 memcached_behavior flag)
 193 {
 194   memcached_flags temp_flag= MEM_NO_BLOCK;
 195
 196   switch (flag)
 197   {
 198   case MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICAS:
 199     return ptr->number_of_replicas;
 200   case MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK:
 201     return ptr->io_msg_watermark;
 202   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
 203     return ptr->io_bytes_watermark;
 204   case MEMCACHED_BEHAVIOR_IO_KEY_PREFETCH:
 205     return ptr->io_key_prefetch;
 206   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
 207     temp_flag= MEM_BINARY_PROTOCOL;
 208     break;
 209   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
 210     temp_flag= MEM_SUPPORT_CAS;
 211     break;
 212   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 213     temp_flag= MEM_USE_CACHE_LOOKUPS;
 214     break;
 215   case MEMCACHED_BEHAVIOR_NO_BLOCK:
 216     temp_flag= MEM_NO_BLOCK;
 217     break;
 218   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
 219     temp_flag= MEM_BUFFER_REQUESTS;
 220     break;
 221   case MEMCACHED_BEHAVIOR_USE_UDP:
 222     temp_flag= MEM_USE_UDP;
 223     break;
 224   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
 225     temp_flag= MEM_TCP_NODELAY;
 226     break;
 227   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 228     temp_flag= MEM_VERIFY_KEY;
 229     break;
 230   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
 231     temp_flag= MEM_KETAMA_WEIGHTED;
 232     break;
 233   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
 234     return ptr->distribution;
 235   case MEMCACHED_BEHAVIOR_KETAMA:
 236     return (ptr->distribution == MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA) ? (uint64_t) 1 : 0;
 237   case MEMCACHED_BEHAVIOR_KETAMA_COMPAT_MODE:
 238     switch (ptr->distribution)
 239     {
 240     case MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA:
 241       return MEMCACHED_KETAMA_COMPAT_LIBMEMCACHED;
 242     case MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA_SPY:
 243       return MEMCACHED_KETAMA_COMPAT_SPY;
 244     default:
 245       return (uint64_t)-1;
 246     }
 247     /* NOTREACHED */
 248   case MEMCACHED_BEHAVIOR_HASH:
 249     return ptr->hash;
 250   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 251     return ptr->hash_continuum;
 252   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
 253     return ptr->server_failure_limit;
 254   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 255     temp_flag= MEM_USE_SORT_HOSTS;
 256     break;
 257   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 258     return (uint64_t)ptr->poll_timeout;
 259   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 260     return (uint64_t)ptr->connect_timeout;
 261   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 262     return (uint64_t)ptr->retry_timeout;
 263   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
 264     return (uint64_t)ptr->snd_timeout;
 265   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
 266     return (uint64_t)ptr->rcv_timeout;
 267   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 268     {
 269       int sock_size;
 270       socklen_t sock_length= sizeof(int);
 271
 272       /* REFACTOR */
 273       /* We just try the first host, and if it is down we return zero */
 274       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 275         return 0;
 276
 277       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 278                      SO_SNDBUF, &sock_size, &sock_length))
 279         return 0; /* Zero means error */
 280
 281       return (uint64_t) sock_size;
 282     }
 283   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 284     {
 285       int sock_size;
 286       socklen_t sock_length= sizeof(int);
 287
 288       /* REFACTOR */
 289       /* We just try the first host, and if it is down we return zero */
 290       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 291         return 0;
 292
 293       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 294                      SO_RCVBUF, &sock_size, &sock_length))
 295         return 0; /* Zero means error */
 296
 297       return (uint64_t) sock_size;
 298     }
 299   case MEMCACHED_BEHAVIOR_USER_DATA:
 300     return MEMCACHED_FAILURE;
 301   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 302     temp_flag= MEM_HASH_WITH_PREFIX_KEY;
 303     break;
 304   case MEMCACHED_BEHAVIOR_NOREPLY:
 305     temp_flag= MEM_NOREPLY;
 306     break;
 307   case MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS:
 308     temp_flag= MEM_AUTO_EJECT_HOSTS;
 309     break;
 310   case MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READ:
 311     temp_flag= MEM_RANDOMIZE_REPLICA_READ;
 312     break;
 313   default:
 314     WATCHPOINT_ASSERT(flag);
 315     break;
 316   }
 317
 318   WATCHPOINT_ASSERT(temp_flag); /* Programming mistake if it gets this far */
 319   if (ptr->flags & temp_flag)
 320     return 1;
 321   else
 322     return 0;
 323 }