summaryrefslogtreecommitdiffstats
path: root/ctdb/ib/ibw_ctdb.c
blob: 53293810ca8311c77329416a4e98674eb1f1d1d9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
/*
 * Unix SMB/CIFS implementation.
 * Join infiniband wrapper and ctdb.
 *
 * Copyright (C) Sven Oehme <oehmes@de.ibm.com> 2006
 *
 * Major code contributions by Peter Somogyi <psomogyi@gamax.hu>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "includes.h"
#include "lib/events/events.h"
#include <system/network.h>
#include <assert.h>
#include "ctdb_private.h"
#include "ibwrapper.h"
#include "ibw_ctdb.h"

int ctdb_ibw_node_connect(struct ibw_ctx *ictx, struct ctdb_node *node)
{
	struct sockaddr_in sock_out;

	memset(&sock_out, 0, sizeof(struct sockaddr_in));
	inet_pton(AF_INET, node->address.address, &sock_out.sin_addr);
	sock_out.sin_port = htons(node->address.port);
	sock_out.sin_family = PF_INET;

	if (ibw_connect(ictx, &sock_out, node)) {
		DEBUG(0, ("ctdb_ibw_node_connect: ibw_connect failed - retrying in 1 sec...\n"));
		/* try again once a second */
		event_add_timed(node->ctdb->ev, node, timeval_current_ofs(1, 0), 
			ctdb_ibw_node_connect_event, node);
		return -1;
	}

	/* continues at ibw_ctdb.c/IBWC_CONNECTED in good case */
	return 0;
}

void ctdb_ibw_node_connect_event(struct event_context *ev, struct timed_event *te, 
	struct timeval t, void *private)
{
	struct ctdb_node *node = talloc_get_type(private, struct ctdb_node);
	struct ibw_ctx *ictx = talloc_get_type(node->ctdb->private, struct ibw_ctx);

	ctdb_ibw_node_connect(ictx, node);
}

int ctdb_ibw_connstate_handler(struct ibw_ctx *ctx, struct ibw_conn *conn)
{
	if (ctx!=NULL) {
		/* ctx->state changed */
		switch(ctx->state) {
		case IBWS_INIT: /* ctx start - after ibw_init */
			break;
		case IBWS_READY: /* after ibw_bind & ibw_listen */
			break;
		case IBWS_CONNECT_REQUEST: /* after [IBWS_READY + incoming request] */
				/* => [(ibw_accept)IBWS_READY | (ibw_disconnect)STOPPED | ERROR] */
			if (ibw_accept(ctx, conn, NULL)) {
				DEBUG(0, ("connstate_handler/ibw_accept failed\n"));
				return -1;
			} /* else continue in IBWC_CONNECTED */
			break;
		case IBWS_STOPPED: /* normal stop <= ibw_disconnect+(IBWS_READY | IBWS_CONNECT_REQUEST) */
			/* TODO: have a CTDB upcall for which CTDB should wait in a (final) loop */
			break;
		case IBWS_ERROR: /* abnormal state; ibw_stop must be called after this */
			break;
		default:
			assert(0);
			break;
		}
	}

	if (conn!=NULL) {
		/* conn->state changed */
		switch(conn->state) {
		case IBWC_INIT: /* conn start - internal state */
			break;
		case IBWC_CONNECTED: { /* after ibw_accept or ibw_connect */
			struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
			if (node!=NULL) { /* after ibw_connect */
				node->private = (void *)conn;
				node->ctdb->upcalls->node_connected(node);
			} else { /* after ibw_accept */
				/* NOP in CTDB case */
			}
		} break;
		case IBWC_DISCONNECTED: { /* after ibw_disconnect */
			/* TODO: have a CTDB upcall */
			struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
			if (node!=NULL)
				node->ctdb->upcalls->node_dead(node);
			talloc_free(conn);
			/* normal + intended disconnect => not reconnecting in this layer */
		} break;
		case IBWC_ERROR: {
			struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
			if (node!=NULL)
				node->private = NULL; /* not to use again */

			DEBUG(10, ("IBWC_ERROR, reconnecting immediately...\n"));
			talloc_free(conn);
			event_add_timed(node->ctdb->ev, node, timeval_current_ofs(1, 0),
				ctdb_ibw_node_connect_event, node);
		} break;
		default:
			assert(0);
			break;
		}
	}

	return 0;
}

int ctdb_ibw_receive_handler(struct ibw_conn *conn, void *buf, int n)
{
	struct ctdb_context *ctdb = talloc_get_type(conn->ctx->ctx_userdata, struct ctdb_context);
	void	*buf2; /* future TODO: a solution for removal of this */

	assert(ctdb!=NULL);
	assert(buf!=NULL);
	assert(conn!=NULL);
	assert(conn->state==IBWC_CONNECTED);

	/* so far "buf" is an ib-registered memory area
	 * and being reused for next receive
	 * noticed that HL requires talloc-ed memory to be stolen */
	buf2 = talloc_zero_size(conn, n);
	memcpy(buf2, buf, n);

	ctdb->upcalls->recv_pkt(ctdb, (uint8_t *)buf2, (uint32_t)n);

	return 0;
}