git.m6w6.name Git - m6w6/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= (int32_t)data;
  32     break;
  33   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
  34     ptr->io_bytes_watermark= (int32_t)data;
  35     break;
  36   case MEMCACHED_BEHAVIOR_IO_KEY_PREFETCH:
  37     ptr->io_key_prefetch = (int32_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(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_HASH:
 109 #ifndef HAVE_HSIEH_HASH
 110     if ((memcached_hash)(data) == MEMCACHED_HASH_HSIEH)
 111       return MEMCACHED_FAILURE;
 112 #endif
 113     ptr->hash= (memcached_hash)(data);
 114     break;
 115   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 116     ptr->hash_continuum= (memcached_hash)(data);
 117     run_distribution(ptr);
 118     break;
 119   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 120     set_behavior_flag(ptr, MEM_USE_CACHE_LOOKUPS, data);
 121     memcached_quit(ptr);
 122     break;
 123   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 124     if (ptr->flags & MEM_BINARY_PROTOCOL)
 125         break;
 126     set_behavior_flag(ptr, MEM_VERIFY_KEY, data);
 127     break;
 128   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 129     {
 130       set_behavior_flag(ptr, MEM_USE_SORT_HOSTS, data);
 131       run_distribution(ptr);
 132
 133       break;
 134     }
 135   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 136     ptr->poll_timeout= (int32_t)data;
 137     break;
 138   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 139     ptr->connect_timeout= (int32_t)data;
 140     break;
 141   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 142     ptr->retry_timeout= (int32_t)data;
 143     break;
 144   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 145     ptr->send_size= (int32_t)data;
 146     memcached_quit(ptr);
 147     break;
 148   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 149     ptr->recv_size= (int32_t)data;
 150     memcached_quit(ptr);
 151     break;
 152   case MEMCACHED_BEHAVIOR_USER_DATA:
 153     return MEMCACHED_FAILURE;
 154   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 155     set_behavior_flag(ptr, MEM_HASH_WITH_PREFIX_KEY, data);
 156     break;
 157   case MEMCACHED_BEHAVIOR_NOREPLY:
 158     set_behavior_flag(ptr, MEM_NOREPLY, data);
 159     break;
 160   case MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS:
 161     set_behavior_flag(ptr, MEM_AUTO_EJECT_HOSTS, data);
 162     break;
 163   default:
 164     /* Shouldn't get here */
 165     WATCHPOINT_ASSERT(flag);
 166     break;
 167   }
 168
 169   return MEMCACHED_SUCCESS;
 170 }
 171
 172 uint64_t memcached_behavior_get(memcached_st *ptr,
 173                                 memcached_behavior flag)
 174 {
 175   memcached_flags temp_flag= 0;
 176
 177   switch (flag)
 178   {
 179   case MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICAS:
 180     return ptr->number_of_replicas;
 181   case MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK:
 182     return ptr->io_msg_watermark;
 183   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
 184     return ptr->io_bytes_watermark;
 185   case MEMCACHED_BEHAVIOR_IO_KEY_PREFETCH:
 186     return ptr->io_key_prefetch;
 187   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
 188     temp_flag= MEM_BINARY_PROTOCOL;
 189     break;
 190   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
 191     temp_flag= MEM_SUPPORT_CAS;
 192     break;
 193   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 194     temp_flag= MEM_USE_CACHE_LOOKUPS;
 195     break;
 196   case MEMCACHED_BEHAVIOR_NO_BLOCK:
 197     temp_flag= MEM_NO_BLOCK;
 198     break;
 199   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
 200     temp_flag= MEM_BUFFER_REQUESTS;
 201     break;
 202   case MEMCACHED_BEHAVIOR_USE_UDP:
 203     temp_flag= MEM_USE_UDP;
 204     break;
 205   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
 206     temp_flag= MEM_TCP_NODELAY;
 207     break;
 208   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 209     temp_flag= MEM_VERIFY_KEY;
 210     break;
 211   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
 212     temp_flag= MEM_KETAMA_WEIGHTED;
 213     break;
 214   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
 215     return ptr->distribution;
 216   case MEMCACHED_BEHAVIOR_KETAMA:
 217     return (ptr->distribution == MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA) ? 1 : 0;
 218   case MEMCACHED_BEHAVIOR_HASH:
 219     return ptr->hash;
 220   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 221     return ptr->hash_continuum;
 222   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
 223     return ptr->server_failure_limit;
 224   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 225     temp_flag= MEM_USE_SORT_HOSTS;
 226     break;
 227   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 228     {
 229       return (uint64_t)ptr->poll_timeout;
 230     }
 231   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 232     {
 233       return (uint64_t)ptr->connect_timeout;
 234     }
 235   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 236     {
 237       return (uint64_t)ptr->retry_timeout;
 238     }
 239   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
 240     return (uint64_t)ptr->snd_timeout;
 241   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
 242     return (uint64_t)ptr->rcv_timeout;
 243   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 244     {
 245       int sock_size;
 246       socklen_t sock_length= sizeof(int);
 247
 248       /* REFACTOR */
 249       /* We just try the first host, and if it is down we return zero */
 250       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 251         return 0;
 252
 253       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 254                      SO_SNDBUF, &sock_size, &sock_length))
 255         return 0; /* Zero means error */
 256
 257       return sock_size;
 258     }
 259   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 260     {
 261       int sock_size;
 262       socklen_t sock_length= sizeof(int);
 263
 264       /* REFACTOR */
 265       /* We just try the first host, and if it is down we return zero */
 266       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 267         return 0;
 268
 269       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 270                      SO_RCVBUF, &sock_size, &sock_length))
 271         return 0; /* Zero means error */
 272
 273       return sock_size;
 274     }
 275   case MEMCACHED_BEHAVIOR_USER_DATA:
 276     return MEMCACHED_FAILURE;
 277   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 278     temp_flag= MEM_HASH_WITH_PREFIX_KEY;
 279     break;
 280   case MEMCACHED_BEHAVIOR_NOREPLY:
 281     temp_flag= MEM_NOREPLY;
 282     break;
 283   case MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS:
 284     temp_flag= MEM_AUTO_EJECT_HOSTS;
 285     break;
 286   default:
 287     WATCHPOINT_ASSERT(flag);
 288     break;
 289   }
 290
 291   WATCHPOINT_ASSERT(temp_flag); /* Programming mistake if it gets this far */
 292   if (ptr->flags & temp_flag)
 293     return 1;
 294   else
 295     return 0;
 296 }