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_IO_MSG_WATERMARK:
  28     ptr->io_msg_watermark= (int32_t)data;
  29     break;
  30   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
  31     ptr->io_bytes_watermark= (int32_t)data;
  32     break;
  33   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
  34     ptr->snd_timeout= (int32_t)data;
  35     break;
  36   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
  37     ptr->rcv_timeout= (int32_t)data;
  38     break;
  39   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
  40     ptr->server_failure_limit= (uint32_t)data;
  41     break;
  42   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
  43     if (data)
  44         set_behavior_flag(ptr, MEM_VERIFY_KEY, 0);
  45     set_behavior_flag(ptr, MEM_BINARY_PROTOCOL, data);
  46     break;
  47   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
  48     set_behavior_flag(ptr, MEM_SUPPORT_CAS, data);
  49     break;
  50   case MEMCACHED_BEHAVIOR_NO_BLOCK:
  51     set_behavior_flag(ptr, MEM_NO_BLOCK, data);
  52     memcached_quit(ptr);
  53     break;
  54   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
  55     set_behavior_flag(ptr, MEM_BUFFER_REQUESTS, data);
  56     memcached_quit(ptr);
  57     break;
  58   case MEMCACHED_BEHAVIOR_USE_UDP:
  59     if (ptr->number_of_hosts)
  60       return MEMCACHED_FAILURE;
  61     set_behavior_flag(ptr, MEM_USE_UDP, data);
  62     if (data)
  63       set_behavior_flag(ptr,MEM_NOREPLY,data);
  64     break;
  65   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
  66     set_behavior_flag(ptr, MEM_TCP_NODELAY, data);
  67     memcached_quit(ptr);
  68     break;
  69   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
  70     {
  71       ptr->distribution= (memcached_server_distribution)(data);
  72       if (ptr->distribution == MEMCACHED_DISTRIBUTION_RANDOM)
  73       {
  74         srandom(time(NULL));
  75       }
  76       run_distribution(ptr);
  77       break;
  78     }
  79   case MEMCACHED_BEHAVIOR_KETAMA:
  80     {
  81       if (data)
  82       {
  83         ptr->hash= MEMCACHED_HASH_MD5;
  84         ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
  85       }
  86       else
  87       {
  88         ptr->hash= 0;
  89         ptr->distribution= 0;
  90       }
  91       run_distribution(ptr);
  92       break;
  93     }
  94   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
  95     {
  96       ptr->hash= MEMCACHED_HASH_MD5;
  97       ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
  98       set_behavior_flag(ptr, MEM_KETAMA_WEIGHTED, data);
  99       run_distribution(ptr);
 100       break;
 101     }
 102   case MEMCACHED_BEHAVIOR_HASH:
 103 #ifndef HAVE_HSIEH_HASH
 104     if ((memcached_hash)(data) == MEMCACHED_HASH_HSIEH)
 105       return MEMCACHED_FAILURE;
 106 #endif
 107     ptr->hash= (memcached_hash)(data);
 108     break;
 109   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 110     ptr->hash_continuum= (memcached_hash)(data);
 111     run_distribution(ptr);
 112     break;
 113   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 114     set_behavior_flag(ptr, MEM_USE_CACHE_LOOKUPS, data);
 115     memcached_quit(ptr);
 116     break;
 117   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 118     if (ptr->flags & MEM_BINARY_PROTOCOL)
 119         break;
 120     set_behavior_flag(ptr, MEM_VERIFY_KEY, data);
 121     break;
 122   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 123     {
 124       set_behavior_flag(ptr, MEM_USE_SORT_HOSTS, data);
 125       run_distribution(ptr);
 126
 127       break;
 128     }
 129   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 130     ptr->poll_timeout= (int32_t)data;
 131     break;
 132   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 133     ptr->connect_timeout= (int32_t)data;
 134     break;
 135   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 136     ptr->retry_timeout= (int32_t)data;
 137     break;
 138   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 139     ptr->send_size= (int32_t)data;
 140     memcached_quit(ptr);
 141     break;
 142   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 143     ptr->recv_size= (int32_t)data;
 144     memcached_quit(ptr);
 145     break;
 146   case MEMCACHED_BEHAVIOR_USER_DATA:
 147     return MEMCACHED_FAILURE;
 148   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 149     set_behavior_flag(ptr, MEM_HASH_WITH_PREFIX_KEY, data);
 150     break;
 151   case MEMCACHED_BEHAVIOR_NOREPLY:
 152     set_behavior_flag(ptr, MEM_NOREPLY, data);
 153     break;
 154   }
 155
 156   return MEMCACHED_SUCCESS;
 157 }
 158
 159 uint64_t memcached_behavior_get(memcached_st *ptr,
 160                                 memcached_behavior flag)
 161 {
 162   memcached_flags temp_flag= 0;
 163
 164   switch (flag)
 165   {
 166   case MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK:
 167     return ptr->io_msg_watermark;
 168   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
 169     return ptr->io_bytes_watermark;
 170   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
 171     temp_flag= MEM_BINARY_PROTOCOL;
 172     break;
 173   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
 174     temp_flag= MEM_SUPPORT_CAS;
 175     break;
 176   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 177     temp_flag= MEM_USE_CACHE_LOOKUPS;
 178     break;
 179   case MEMCACHED_BEHAVIOR_NO_BLOCK:
 180     temp_flag= MEM_NO_BLOCK;
 181     break;
 182   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
 183     temp_flag= MEM_BUFFER_REQUESTS;
 184     break;
 185   case MEMCACHED_BEHAVIOR_USE_UDP:
 186     temp_flag= MEM_USE_UDP;
 187     break;
 188   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
 189     temp_flag= MEM_TCP_NODELAY;
 190     break;
 191   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 192     temp_flag= MEM_VERIFY_KEY;
 193     break;
 194   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
 195     temp_flag= MEM_KETAMA_WEIGHTED;
 196     break;
 197   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
 198     return ptr->distribution;
 199   case MEMCACHED_BEHAVIOR_KETAMA:
 200     return (ptr->distribution == MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA) ? 1 : 0;
 201   case MEMCACHED_BEHAVIOR_HASH:
 202     return ptr->hash;
 203   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 204     return ptr->hash_continuum;
 205   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
 206     return ptr->server_failure_limit;
 207   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 208     temp_flag= MEM_USE_SORT_HOSTS;
 209     break;
 210   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 211     {
 212       return (uint64_t)ptr->poll_timeout;
 213     }
 214   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 215     {
 216       return (uint64_t)ptr->connect_timeout;
 217     }
 218   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 219     {
 220       return (uint64_t)ptr->retry_timeout;
 221     }
 222   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
 223     return (uint64_t)ptr->snd_timeout;
 224   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
 225     return (uint64_t)ptr->rcv_timeout;
 226   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 227     {
 228       int sock_size;
 229       socklen_t sock_length= sizeof(int);
 230
 231       /* REFACTOR */
 232       /* We just try the first host, and if it is down we return zero */
 233       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 234         return 0;
 235
 236       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 237                      SO_SNDBUF, &sock_size, &sock_length))
 238         return 0; /* Zero means error */
 239
 240       return sock_size;
 241     }
 242   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 243     {
 244       int sock_size;
 245       socklen_t sock_length= sizeof(int);
 246
 247       /* REFACTOR */
 248       /* We just try the first host, and if it is down we return zero */
 249       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 250         return 0;
 251
 252       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 253                      SO_RCVBUF, &sock_size, &sock_length))
 254         return 0; /* Zero means error */
 255
 256       return sock_size;
 257     }
 258   case MEMCACHED_BEHAVIOR_USER_DATA:
 259     return MEMCACHED_FAILURE;
 260   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 261     temp_flag= MEM_HASH_WITH_PREFIX_KEY;
 262     break;
 263   case MEMCACHED_BEHAVIOR_NOREPLY:
 264     temp_flag= MEM_NOREPLY;
 265     break;
 266   }
 267
 268   WATCHPOINT_ASSERT(temp_flag); /* Programming mistake if it gets this far */
 269   if (ptr->flags & temp_flag)
 270     return 1;
 271   else
 272     return 0;
 273 }