src/amok/HostManagement/hostmanagement.c

   1 /* $Id$ */
   2
   3 /* amok host management - servers main loop and remote host stopping        */
   4
   5 /* Copyright (c) 2006 Martin Quinson. All rights reserved.                  */
   6
   7 /* This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the license (GNU LGPL) which comes with this package. */
   9
  10 #include "xbt/sysdep.h"
  11 #include "xbt/host.h"
  12 #include "amok/hostmanagement.h"
  13 #include "gras/Virtu/virtu_interface.h" /* libdata */
  14
  15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(amok_hm,amok,"Host management");
  16
  17
  18 /* libdata management */
  19 static int amok_hm_libdata_id;
  20 typedef struct {
  21   int done;
  22   xbt_dict_t groups;
  23 } s_amok_hm_libdata_t, *amok_hm_libdata_t;
  24
  25 static void *amok_hm_libdata_new() {
  26   amok_hm_libdata_t res=xbt_new(s_amok_hm_libdata_t,1);
  27   res->done = 0;
  28   res->groups = xbt_dict_new();
  29   return res;
  30 }
  31 static void amok_hm_libdata_free(void *d) {
  32   amok_hm_libdata_t data=(amok_hm_libdata_t)d;
  33   xbt_dict_free(&data->groups);
  34   free (data);
  35 }
  36
  37 /* Message callbacks */
  38 static int amok_hm_cb_kill(gras_msg_cb_ctx_t ctx,
  39                            void             *payload_data) {
  40
  41   amok_hm_libdata_t g=gras_libdata_by_id(amok_hm_libdata_id);
  42   g->done = 1;
  43   return 1;
  44 }
  45 static int amok_hm_cb_killrpc(gras_msg_cb_ctx_t ctx,
  46                               void             *payload_data) {
  47
  48   amok_hm_libdata_t g=gras_libdata_by_id(amok_hm_libdata_id);
  49   g->done = 1;
  50   gras_msg_rpcreturn(30,ctx,NULL);
  51   return 1;
  52 }
  53
  54 static int amok_hm_cb_get(gras_msg_cb_ctx_t ctx, void *payload) {
  55   amok_hm_libdata_t g=gras_libdata_by_id(amok_hm_libdata_id);
  56   char *name = *(void**)payload;
  57   xbt_dynar_t res = xbt_dict_get(g->groups, name);
  58
  59   gras_msg_rpcreturn(30, ctx, &res);
  60   return 1;
  61 }
  62 static int amok_hm_cb_join(gras_msg_cb_ctx_t ctx, void *payload) {
  63   amok_hm_libdata_t g=gras_libdata_by_id(amok_hm_libdata_id);
  64   char *name = *(void**)payload;
  65   xbt_dynar_t group = xbt_dict_get(g->groups, name);
  66
  67   gras_socket_t exp = gras_msg_cb_ctx_from(ctx);
  68   xbt_host_t dude = xbt_host_new(gras_socket_peer_name(exp),
  69                                  gras_socket_peer_port(exp));
  70
  71   xbt_dynar_push(group,&dude);
  72
  73   gras_msg_rpcreturn(30, ctx, NULL);
  74   return 1;
  75 }
  76 static int amok_hm_cb_leave(gras_msg_cb_ctx_t ctx, void *payload) {
  77   amok_hm_libdata_t g=gras_libdata_by_id(amok_hm_libdata_id);
  78   char *name = *(void**)payload;
  79   xbt_dynar_t group = xbt_dict_get(g->groups, name);
  80
  81   gras_socket_t exp = gras_msg_cb_ctx_from(ctx);
  82   xbt_host_t dude = xbt_host_new(gras_socket_peer_name(exp),
  83                                  gras_socket_peer_port(exp));
  84
  85   int cpt;
  86   xbt_host_t host_it;
  87
  88   xbt_dynar_foreach(group, cpt, host_it) {
  89     if (!strcmp(host_it->name, dude->name) &&
  90         host_it->port == dude->port) {
  91       xbt_dynar_cursor_rm (group,&cpt);
  92       goto end;
  93     }
  94   }
  95   WARN3("Asked to remove %s:%d from group '%s', but not found. Ignoring",
  96         dude->name,dude->port, name);
  97
  98  end:
  99   gras_msg_rpcreturn(30, ctx, NULL);
 100   return 1;
 101 }
 102
 103 static int amok_hm_cb_shutdown(gras_msg_cb_ctx_t ctx, void *payload) {
 104   char *name = *(void**)payload;
 105   amok_hm_group_shutdown_local(name);
 106
 107   gras_msg_rpcreturn(30, ctx, NULL);
 108   return 1;
 109 }
 110
 111
 112 /* Initialization stuff */
 113 static short amok_hm_used = 0;
 114 void amok_hm_init() {
 115   /* pure INIT part */
 116   if (! amok_hm_used) {
 117
 118     /* dependencies */
 119     amok_base_init();
 120
 121     /* module data on each process */
 122     amok_hm_libdata_id = gras_procdata_add("amok_hm",
 123                                            amok_hm_libdata_new,
 124                                            amok_hm_libdata_free);
 125
 126     /* Datatype and message declarations */
 127     gras_msgtype_declare("amok_hm_kill",NULL);
 128     gras_msgtype_declare_rpc("amok_hm_kill",NULL,NULL);
 129
 130     gras_msgtype_declare_rpc("amok_hm_get",
 131                              gras_datadesc_by_name("string"),
 132                              gras_datadesc_by_name("xbt_dynar_t"));
 133     gras_msgtype_declare_rpc("amok_hm_join",
 134                              gras_datadesc_by_name("string"),
 135                              NULL);
 136     gras_msgtype_declare_rpc("amok_hm_leave",
 137                              gras_datadesc_by_name("string"),
 138                              NULL);
 139
 140     gras_msgtype_declare_rpc("amok_hm_shutdown",
 141                              gras_datadesc_by_name("string"),
 142                              NULL);
 143   }
 144   amok_hm_used++;
 145
 146   /* JOIN part */
 147   gras_cb_register(gras_msgtype_by_name("amok_hm_kill"),
 148                    &amok_hm_cb_kill);
 149   gras_cb_register(gras_msgtype_by_name("amok_hm_killrpc"),
 150                    &amok_hm_cb_killrpc);
 151
 152   gras_cb_register(gras_msgtype_by_name("amok_hm_get"),
 153                    &amok_hm_cb_get);
 154   gras_cb_register(gras_msgtype_by_name("amok_hm_join"),
 155                    &amok_hm_cb_join);
 156   gras_cb_register(gras_msgtype_by_name("amok_hm_leave"),
 157                    &amok_hm_cb_leave);
 158   gras_cb_register(gras_msgtype_by_name("amok_hm_shutdown"),
 159                    &amok_hm_cb_shutdown);
 160 }
 161
 162
 163
 164 void amok_hm_exit() {
 165   /* pure EXIT part */
 166   amok_hm_used--;
 167
 168   /* LEAVE part */
 169   gras_cb_unregister(gras_msgtype_by_name("amok_hm_kill"),
 170                      &amok_hm_cb_kill);
 171   gras_cb_unregister(gras_msgtype_by_name("amok_hm_killrpc"),
 172                      &amok_hm_cb_killrpc);
 173
 174   gras_cb_unregister(gras_msgtype_by_name("amok_hm_get"),
 175                      &amok_hm_cb_get);
 176   gras_cb_unregister(gras_msgtype_by_name("amok_hm_join"),
 177                      &amok_hm_cb_join);
 178   gras_cb_unregister(gras_msgtype_by_name("amok_hm_leave"),
 179                      &amok_hm_cb_leave);
 180
 181   gras_cb_unregister(gras_msgtype_by_name("amok_hm_shutdown"),
 182                      &amok_hm_cb_shutdown);
 183 }
 184
 185
 186 void amok_hm_mainloop(double timeOut) {
 187   amok_hm_libdata_t g=gras_libdata_by_id(amok_hm_libdata_id);
 188
 189   while (!g->done) {
 190     gras_msg_handle(timeOut);
 191   }
 192 }
 193
 194 /** \brief kill a buddy identified by its hostname and port */
 195 void amok_hm_kill_hp(char *name,int port) {
 196   gras_socket_t sock=gras_socket_client(name,port);
 197   amok_hm_kill(sock);
 198   gras_socket_close(sock);
 199 }
 200
 201 /** \brief kill a buddy to which we have a socket already */
 202 void amok_hm_kill(gras_socket_t buddy) {
 203   gras_msg_send(buddy,gras_msgtype_by_name("amok_hm_kill"),NULL);
 204 }
 205
 206 /** \brief kill syncronously a buddy (do not return before its death) */
 207 void amok_hm_kill_sync(gras_socket_t buddy) {
 208   gras_msg_rpccall(buddy,30,gras_msgtype_by_name("amok_hm_killrpc"),NULL,NULL);
 209 }
 210
 211
 212 /** \brief create a new hostmanagement group located on local host
 213  *
 214  * The dynar elements are of type xbt_host_t
 215  */
 216 xbt_dynar_t amok_hm_group_new(char *group_name) {
 217   amok_hm_libdata_t g=gras_libdata_by_id(amok_hm_libdata_id);
 218   xbt_dynar_t res = xbt_dynar_new(sizeof(xbt_host_t),
 219                                   &xbt_host_free_voidp);
 220
 221   xbt_dict_set(g->groups,group_name,res,&xbt_dynar_free_voidp);
 222
 223   return res;
 224 }
 225 /** \brief retrieve all members of the given remote group */
 226 xbt_dynar_t amok_hm_group_get(gras_socket_t master, char *group_name) {
 227   xbt_dynar_t res;
 228
 229   gras_msg_rpccall(master,30,gras_msgtype_by_name("amok_hm_get"),
 230                    &group_name,&res);
 231   return res;
 232 }
 233
 234 /** \brief add current host to the given remote group */
 235 void        amok_hm_group_join(gras_socket_t master, char *group_name) {
 236   gras_msg_rpccall(master,30,gras_msgtype_by_name("amok_hm_join"),
 237                    &group_name,NULL);
 238 }
 239 /** \brief remove current host from the given remote group if found
 240  *
 241  * If not found, call is ignored
 242  */
 243 void        amok_hm_group_leave(gras_socket_t master, char *group_name) {
 244   gras_msg_rpccall(master,30,gras_msgtype_by_name("amok_hm_leave"),
 245                    &group_name,NULL);
 246 }
 247
 248 /** \brief stops all members of the given local group */
 249 void amok_hm_group_shutdown_local(char *group_name) {
 250   amok_hm_libdata_t g=gras_libdata_by_id(amok_hm_libdata_id);
 251   xbt_dynar_t group = xbt_dict_get(g->groups, group_name);
 252
 253   int cpt;
 254   xbt_host_t host_it;
 255
 256   xbt_dynar_foreach(group, cpt, host_it) {
 257     amok_hm_kill_hp(host_it->name, host_it->port);
 258   }
 259
 260   xbt_dict_remove(g->groups,group_name);
 261 }
 262 /** \brief stops all members of the given remote group */
 263 void amok_hm_group_shutdown_remote(gras_socket_t master, char *group_name){
 264   gras_msg_rpccall(master,30,gras_msgtype_by_name("amok_hm_shutdown"),
 265                    &group_name,NULL);
 266 }