ctdb/ib/ibw_ctdb.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  * Join infiniband wrapper and ctdb.
   4  *
   5  * Copyright (C) Sven Oehme <oehmes@de.ibm.com> 2006
   6  *
   7  * Major code contributions by Peter Somogyi <psomogyi@gamax.hu>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include "includes.h"
  24 #include <system/network.h>
  25 #include <assert.h>
  26 #include "ctdb_private.h"
  27 #include "ibwrapper.h"
  28 #include "ibw_ctdb.h"
  29
  30 int ctdb_ibw_get_address(struct ctdb_context *ctdb,
  31         const char *address, struct in_addr *addr)
  32 {
  33         if (inet_pton(AF_INET, address, addr) <= 0) {
  34                 struct hostent *he = gethostbyname(address);
  35                 if (he == NULL || he->h_length > sizeof(*addr)) {
  36                         ctdb_set_error(ctdb, "invalid nework address '%s'\n",
  37                                        address);
  38                         return -1;
  39                 }
  40                 memcpy(addr, he->h_addr, he->h_length);
  41         }
  42         return 0;
  43 }
  44
  45 int ctdb_ibw_node_connect(struct ctdb_node *node)
  46 {
  47         struct ctdb_ibw_node *cn = talloc_get_type(node->private_data, struct ctdb_ibw_node);
  48         int     rc;
  49
  50         assert(cn!=NULL);
  51         assert(cn->conn!=NULL);
  52         struct sockaddr_in sock_out;
  53
  54         memset(&sock_out, 0, sizeof(struct sockaddr_in));
  55         sock_out.sin_port = htons(node->address.port);
  56         sock_out.sin_family = PF_INET;
  57         if (ctdb_ibw_get_address(node->ctdb, node->address.address, &sock_out.sin_addr)) {
  58                 DEBUG(DEBUG_ERR, ("ctdb_ibw_node_connect failed\n"));
  59                 return -1;
  60         }
  61
  62         rc = ibw_connect(cn->conn, &sock_out, node);
  63         if (rc) {
  64                 DEBUG(DEBUG_ERR, ("ctdb_ibw_node_connect/ibw_connect failed - retrying...\n"));
  65                 /* try again once a second */
  66                 event_add_timed(node->ctdb->ev, node, timeval_current_ofs(1, 0),
  67                         ctdb_ibw_node_connect_event, node);
  68         }
  69
  70         /* continues at ibw_ctdb.c/IBWC_CONNECTED in good case */
  71         return 0;
  72 }
  73
  74 void ctdb_ibw_node_connect_event(struct event_context *ev, struct timed_event *te,
  75         struct timeval t, void *private_data)
  76 {
  77         struct ctdb_node *node = talloc_get_type(private_data, struct ctdb_node);
  78
  79         ctdb_ibw_node_connect(node);
  80 }
  81
  82 int ctdb_ibw_connstate_handler(struct ibw_ctx *ctx, struct ibw_conn *conn)
  83 {
  84         if (ctx!=NULL) {
  85                 /* ctx->state changed */
  86                 switch(ctx->state) {
  87                 case IBWS_INIT: /* ctx start - after ibw_init */
  88                         break;
  89                 case IBWS_READY: /* after ibw_bind & ibw_listen */
  90                         break;
  91                 case IBWS_CONNECT_REQUEST: /* after [IBWS_READY + incoming request] */
  92                                 /* => [(ibw_accept)IBWS_READY | (ibw_disconnect)STOPPED | ERROR] */
  93                         if (ibw_accept(ctx, conn, NULL)) {
  94                                 DEBUG(DEBUG_ERR, ("connstate_handler/ibw_accept failed\n"));
  95                                 return -1;
  96                         } /* else continue in IBWC_CONNECTED */
  97                         break;
  98                 case IBWS_STOPPED: /* normal stop <= ibw_disconnect+(IBWS_READY | IBWS_CONNECT_REQUEST) */
  99                         /* TODO: have a CTDB upcall for which CTDB should wait in a (final) loop */
 100                         break;
 101                 case IBWS_ERROR: /* abnormal state; ibw_stop must be called after this */
 102                         break;
 103                 default:
 104                         assert(0);
 105                         break;
 106                 }
 107         }
 108
 109         if (conn!=NULL) {
 110                 /* conn->state changed */
 111                 switch(conn->state) {
 112                 case IBWC_INIT: /* conn start - internal state */
 113                         break;
 114                 case IBWC_CONNECTED: { /* after ibw_accept or ibw_connect */
 115                         struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
 116                         if (node!=NULL) { /* after ibw_connect */
 117                                 struct ctdb_ibw_node *cn = talloc_get_type(node->private_data, struct ctdb_ibw_node);
 118
 119                                 node->ctdb->upcalls->node_connected(node);
 120                                 ctdb_flush_cn_queue(cn);
 121                         } else { /* after ibw_accept */
 122                                 /* NOP in CTDB case */
 123                         }
 124                 } break;
 125                 case IBWC_DISCONNECTED: { /* after ibw_disconnect */
 126                         struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
 127                         if (node!=NULL)
 128                                 node->ctdb->upcalls->node_dead(node);
 129                         talloc_free(conn);
 130                         /* normal + intended disconnect => not reconnecting in this layer */
 131                 } break;
 132                 case IBWC_ERROR: {
 133                         struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
 134                         if (node!=NULL) {
 135                                 struct ctdb_ibw_node *cn = talloc_get_type(node->private_data, struct ctdb_ibw_node);
 136                                 struct ibw_ctx *ictx = cn->conn->ctx;
 137
 138                                 DEBUG(DEBUG_DEBUG, ("IBWC_ERROR, reconnecting...\n"));
 139                                 talloc_free(cn->conn); /* internal queue content is destroyed */
 140                                 cn->conn = (void *)ibw_conn_new(ictx, node);
 141                                 event_add_timed(node->ctdb->ev, node, timeval_current_ofs(1, 0),
 142                                         ctdb_ibw_node_connect_event, node);
 143                         }
 144                 } break;
 145                 default:
 146                         assert(0);
 147                         break;
 148                 }
 149         }
 150
 151         return 0;
 152 }
 153
 154 int ctdb_ibw_receive_handler(struct ibw_conn *conn, void *buf, int n)
 155 {
 156         struct ctdb_context *ctdb = talloc_get_type(conn->ctx->ctx_userdata, struct ctdb_context);
 157         void    *buf2; /* future TODO: a solution for removal of this */
 158
 159         assert(ctdb!=NULL);
 160         assert(buf!=NULL);
 161         assert(conn!=NULL);
 162         assert(conn->state==IBWC_CONNECTED);
 163
 164         /* so far "buf" is an ib-registered memory area
 165          * and being reused for next receive
 166          * noticed that HL requires talloc-ed memory to be stolen */
 167         buf2 = talloc_zero_size(conn, n);
 168         CTDB_NO_MEMORY(ctdb, buf2);
 169
 170         memcpy(buf2, buf, n);
 171
 172         ctdb->upcalls->recv_pkt(ctdb, (uint8_t *)buf2, (uint32_t)n);
 173
 174         return 0;
 175 }