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53f8492caa
This gives a casual reader a useful clue. Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Amitay Isaacs <amitay@gmail.com>
186 lines
5.3 KiB
C
186 lines
5.3 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* Join infiniband wrapper and ctdb.
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*
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* Copyright (C) Sven Oehme <oehmes@de.ibm.com> 2006
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*
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* Major code contributions by Peter Somogyi <psomogyi@gamax.hu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "system/network.h"
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#include <assert.h>
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#include <talloc.h>
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#include <tevent.h>
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#include "lib/util/time.h"
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#include "lib/util/debug.h"
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#include "ctdb_private.h"
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#include "common/common.h"
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#include "common/logging.h"
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#include "ibwrapper.h"
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#include "ibw_ctdb.h"
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int ctdb_ibw_get_address(struct ctdb_context *ctdb,
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const char *address, struct in_addr *addr)
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{
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if (inet_pton(AF_INET, address, addr) <= 0) {
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struct hostent *he = gethostbyname(address);
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if (he == NULL || he->h_length > sizeof(*addr)) {
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ctdb_set_error(ctdb, "invalid network address '%s'\n",
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address);
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return -1;
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}
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memcpy(addr, he->h_addr, he->h_length);
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}
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return 0;
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}
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int ctdb_ibw_node_connect(struct ctdb_node *node)
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{
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struct ctdb_ibw_node *cn = talloc_get_type(node->transport_data,
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struct ctdb_ibw_node);
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int rc;
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assert(cn!=NULL);
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assert(cn->conn!=NULL);
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rc = ibw_connect(cn->conn, &node->address.ip, node);
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if (rc) {
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DEBUG(DEBUG_ERR, ("ctdb_ibw_node_connect/ibw_connect failed - retrying...\n"));
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/* try again once a second */
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tevent_add_timer(node->ctdb->ev, node,
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timeval_current_ofs(1, 0),
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ctdb_ibw_node_connect_event, node);
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}
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/* continues at ibw_ctdb.c/IBWC_CONNECTED in good case */
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return 0;
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}
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void ctdb_ibw_node_connect_event(struct tevent_context *ev,
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struct tevent_timer *te,
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struct timeval t, void *private_data)
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{
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struct ctdb_node *node = talloc_get_type(private_data, struct ctdb_node);
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ctdb_ibw_node_connect(node);
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}
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int ctdb_ibw_connstate_handler(struct ibw_ctx *ctx, struct ibw_conn *conn)
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{
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if (ctx!=NULL) {
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/* ctx->state changed */
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switch(ctx->state) {
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case IBWS_INIT: /* ctx start - after ibw_init */
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break;
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case IBWS_READY: /* after ibw_bind & ibw_listen */
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break;
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case IBWS_CONNECT_REQUEST: /* after [IBWS_READY + incoming request] */
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/* => [(ibw_accept)IBWS_READY | (ibw_disconnect)STOPPED | ERROR] */
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if (ibw_accept(ctx, conn, NULL)) {
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DEBUG(DEBUG_ERR, ("connstate_handler/ibw_accept failed\n"));
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return -1;
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} /* else continue in IBWC_CONNECTED */
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break;
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case IBWS_STOPPED: /* normal stop <= ibw_disconnect+(IBWS_READY | IBWS_CONNECT_REQUEST) */
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/* TODO: have a CTDB upcall for which CTDB should wait in a (final) loop */
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break;
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case IBWS_ERROR: /* abnormal state; ibw_stop must be called after this */
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break;
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default:
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assert(0);
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break;
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}
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}
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if (conn!=NULL) {
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/* conn->state changed */
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switch(conn->state) {
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case IBWC_INIT: /* conn start - internal state */
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break;
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case IBWC_CONNECTED: { /* after ibw_accept or ibw_connect */
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struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
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if (node!=NULL) { /* after ibw_connect */
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struct ctdb_ibw_node *cn = talloc_get_type(
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node->transport_data,
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struct ctdb_ibw_node);
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node->ctdb->upcalls->node_connected(node);
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ctdb_flush_cn_queue(cn);
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} else { /* after ibw_accept */
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/* NOP in CTDB case */
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}
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} break;
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case IBWC_DISCONNECTED: { /* after ibw_disconnect */
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struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
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if (node!=NULL)
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node->ctdb->upcalls->node_dead(node);
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talloc_free(conn);
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/* normal + intended disconnect => not reconnecting in this layer */
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} break;
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case IBWC_ERROR: {
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struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
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if (node!=NULL) {
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struct ctdb_ibw_node *cn = talloc_get_type(
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node->transport_data,
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struct ctdb_ibw_node);
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struct ibw_ctx *ictx = cn->conn->ctx;
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DEBUG(DEBUG_DEBUG, ("IBWC_ERROR, reconnecting...\n"));
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talloc_free(cn->conn); /* internal queue content is destroyed */
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cn->conn = (void *)ibw_conn_new(ictx, node);
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tevent_add_timer(node->ctdb->ev, node,
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timeval_current_ofs(1, 0),
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ctdb_ibw_node_connect_event, node);
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}
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} break;
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default:
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assert(0);
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break;
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}
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}
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return 0;
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}
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int ctdb_ibw_receive_handler(struct ibw_conn *conn, void *buf, int n)
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{
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struct ctdb_context *ctdb = talloc_get_type(conn->ctx->ctx_userdata, struct ctdb_context);
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void *buf2; /* future TODO: a solution for removal of this */
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assert(ctdb!=NULL);
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assert(buf!=NULL);
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assert(conn!=NULL);
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assert(conn->state==IBWC_CONNECTED);
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/* so far "buf" is an ib-registered memory area
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* and being reused for next receive
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* noticed that HL requires talloc-ed memory to be stolen */
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buf2 = talloc_zero_size(conn, n);
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CTDB_NO_MEMORY(ctdb, buf2);
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memcpy(buf2, buf, n);
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ctdb->upcalls->recv_pkt(ctdb, (uint8_t *)buf2, (uint32_t)n);
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return 0;
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}
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