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_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_IO_KEY_PREFETCH:
  34     ptr->io_key_prefetch = (int32_t)data;
  35     break;
  36   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
  37     ptr->snd_timeout= (int32_t)data;
  38     break;
  39   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
  40     ptr->rcv_timeout= (int32_t)data;
  41     break;
  42   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
  43     ptr->server_failure_limit= (uint32_t)data;
  44     break;
  45   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
  46     if (data)
  47         set_behavior_flag(ptr, MEM_VERIFY_KEY, 0);
  48     set_behavior_flag(ptr, MEM_BINARY_PROTOCOL, data);
  49     break;
  50   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
  51     set_behavior_flag(ptr, MEM_SUPPORT_CAS, data);
  52     break;
  53   case MEMCACHED_BEHAVIOR_NO_BLOCK:
  54     set_behavior_flag(ptr, MEM_NO_BLOCK, data);
  55     memcached_quit(ptr);
  56     break;
  57   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
  58     set_behavior_flag(ptr, MEM_BUFFER_REQUESTS, data);
  59     memcached_quit(ptr);
  60     break;
  61   case MEMCACHED_BEHAVIOR_USE_UDP:
  62     if (ptr->number_of_hosts)
  63       return MEMCACHED_FAILURE;
  64     set_behavior_flag(ptr, MEM_USE_UDP, data);
  65     if (data)
  66       set_behavior_flag(ptr,MEM_NOREPLY,data);
  67     break;
  68   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
  69     set_behavior_flag(ptr, MEM_TCP_NODELAY, data);
  70     memcached_quit(ptr);
  71     break;
  72   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
  73     {
  74       ptr->distribution= (memcached_server_distribution)(data);
  75       if (ptr->distribution == MEMCACHED_DISTRIBUTION_RANDOM)
  76       {
  77         srandom(time(NULL));
  78       }
  79       run_distribution(ptr);
  80       break;
  81     }
  82   case MEMCACHED_BEHAVIOR_KETAMA:
  83     {
  84       if (data)
  85       {
  86         ptr->hash= MEMCACHED_HASH_MD5;
  87         ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
  88       }
  89       else
  90       {
  91         ptr->hash= 0;
  92         ptr->distribution= 0;
  93       }
  94       run_distribution(ptr);
  95       break;
  96     }
  97   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
  98     {
  99       ptr->hash= MEMCACHED_HASH_MD5;
 100       ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
 101       set_behavior_flag(ptr, MEM_KETAMA_WEIGHTED, data);
 102       run_distribution(ptr);
 103       break;
 104     }
 105   case MEMCACHED_BEHAVIOR_HASH:
 106 #ifndef HAVE_HSIEH_HASH
 107     if ((memcached_hash)(data) == MEMCACHED_HASH_HSIEH)
 108       return MEMCACHED_FAILURE;
 109 #endif
 110     ptr->hash= (memcached_hash)(data);
 111     break;
 112   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 113     ptr->hash_continuum= (memcached_hash)(data);
 114     run_distribution(ptr);
 115     break;
 116   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 117     set_behavior_flag(ptr, MEM_USE_CACHE_LOOKUPS, data);
 118     memcached_quit(ptr);
 119     break;
 120   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 121     if (ptr->flags & MEM_BINARY_PROTOCOL)
 122         break;
 123     set_behavior_flag(ptr, MEM_VERIFY_KEY, data);
 124     break;
 125   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 126     {
 127       set_behavior_flag(ptr, MEM_USE_SORT_HOSTS, data);
 128       run_distribution(ptr);
 129
 130       break;
 131     }
 132   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 133     ptr->poll_timeout= (int32_t)data;
 134     break;
 135   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 136     ptr->connect_timeout= (int32_t)data;
 137     break;
 138   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 139     ptr->retry_timeout= (int32_t)data;
 140     break;
 141   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 142     ptr->send_size= (int32_t)data;
 143     memcached_quit(ptr);
 144     break;
 145   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 146     ptr->recv_size= (int32_t)data;
 147     memcached_quit(ptr);
 148     break;
 149   case MEMCACHED_BEHAVIOR_USER_DATA:
 150     return MEMCACHED_FAILURE;
 151   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 152     set_behavior_flag(ptr, MEM_HASH_WITH_PREFIX_KEY, data);
 153     break;
 154   case MEMCACHED_BEHAVIOR_NOREPLY:
 155     set_behavior_flag(ptr, MEM_NOREPLY, data);
 156     break;
 157   case MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS:
 158     set_behavior_flag(ptr, MEM_AUTO_EJECT_HOSTS, data);
 159     break;
 160   }
 161
 162   return MEMCACHED_SUCCESS;
 163 }
 164
 165 uint64_t memcached_behavior_get(memcached_st *ptr,
 166                                 memcached_behavior flag)
 167 {
 168   memcached_flags temp_flag= 0;
 169
 170   switch (flag)
 171   {
 172   case MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK:
 173     return ptr->io_msg_watermark;
 174   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
 175     return ptr->io_bytes_watermark;
 176   case MEMCACHED_BEHAVIOR_IO_KEY_PREFETCH:
 177     return ptr->io_key_prefetch;
 178   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
 179     temp_flag= MEM_BINARY_PROTOCOL;
 180     break;
 181   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
 182     temp_flag= MEM_SUPPORT_CAS;
 183     break;
 184   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 185     temp_flag= MEM_USE_CACHE_LOOKUPS;
 186     break;
 187   case MEMCACHED_BEHAVIOR_NO_BLOCK:
 188     temp_flag= MEM_NO_BLOCK;
 189     break;
 190   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
 191     temp_flag= MEM_BUFFER_REQUESTS;
 192     break;
 193   case MEMCACHED_BEHAVIOR_USE_UDP:
 194     temp_flag= MEM_USE_UDP;
 195     break;
 196   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
 197     temp_flag= MEM_TCP_NODELAY;
 198     break;
 199   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 200     temp_flag= MEM_VERIFY_KEY;
 201     break;
 202   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
 203     temp_flag= MEM_KETAMA_WEIGHTED;
 204     break;
 205   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
 206     return ptr->distribution;
 207   case MEMCACHED_BEHAVIOR_KETAMA:
 208     return (ptr->distribution == MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA) ? 1 : 0;
 209   case MEMCACHED_BEHAVIOR_HASH:
 210     return ptr->hash;
 211   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 212     return ptr->hash_continuum;
 213   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
 214     return ptr->server_failure_limit;
 215   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 216     temp_flag= MEM_USE_SORT_HOSTS;
 217     break;
 218   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 219     {
 220       return (uint64_t)ptr->poll_timeout;
 221     }
 222   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 223     {
 224       return (uint64_t)ptr->connect_timeout;
 225     }
 226   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 227     {
 228       return (uint64_t)ptr->retry_timeout;
 229     }
 230   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
 231     return (uint64_t)ptr->snd_timeout;
 232   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
 233     return (uint64_t)ptr->rcv_timeout;
 234   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 235     {
 236       int sock_size;
 237       socklen_t sock_length= sizeof(int);
 238
 239       /* REFACTOR */
 240       /* We just try the first host, and if it is down we return zero */
 241       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 242         return 0;
 243
 244       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 245                      SO_SNDBUF, &sock_size, &sock_length))
 246         return 0; /* Zero means error */
 247
 248       return sock_size;
 249     }
 250   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 251     {
 252       int sock_size;
 253       socklen_t sock_length= sizeof(int);
 254
 255       /* REFACTOR */
 256       /* We just try the first host, and if it is down we return zero */
 257       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 258         return 0;
 259
 260       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 261                      SO_RCVBUF, &sock_size, &sock_length))
 262         return 0; /* Zero means error */
 263
 264       return sock_size;
 265     }
 266   case MEMCACHED_BEHAVIOR_USER_DATA:
 267     return MEMCACHED_FAILURE;
 268   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 269     temp_flag= MEM_HASH_WITH_PREFIX_KEY;
 270     break;
 271   case MEMCACHED_BEHAVIOR_NOREPLY:
 272     temp_flag= MEM_NOREPLY;
 273     break;
 274   case MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS:
 275     temp_flag= MEM_AUTO_EJECT_HOSTS;
 276     break;
 277   }
 278
 279   WATCHPOINT_ASSERT(temp_flag); /* Programming mistake if it gets this far */
 280   if (ptr->flags & temp_flag)
 281     return 1;
 282   else
 283     return 0;
 284 }