Merge commit 'rusty/ports-from-1.0.112' into foo
[vlendec/samba-autobuild/.git] / 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 "lib/tevent/tevent.h"
25 #include <system/network.h>
26 #include <assert.h>
27 #include "ctdb_private.h"
28 #include "ibwrapper.h"
29 #include "ibw_ctdb.h"
30
31 int ctdb_ibw_get_address(struct ctdb_context *ctdb,
32         const char *address, struct in_addr *addr)
33 {
34         if (inet_pton(AF_INET, address, addr) <= 0) {
35                 struct hostent *he = gethostbyname(address);
36                 if (he == NULL || he->h_length > sizeof(*addr)) {
37                         ctdb_set_error(ctdb, "invalid nework address '%s'\n", 
38                                        address);
39                         return -1;
40                 }
41                 memcpy(addr, he->h_addr, he->h_length);
42         }
43         return 0;
44 }
45
46 int ctdb_ibw_node_connect(struct ctdb_node *node)
47 {
48         struct ctdb_ibw_node *cn = talloc_get_type(node->private_data, struct ctdb_ibw_node);
49         int     rc;
50
51         assert(cn!=NULL);
52         assert(cn->conn!=NULL);
53         struct sockaddr_in sock_out;
54
55         memset(&sock_out, 0, sizeof(struct sockaddr_in));
56         sock_out.sin_port = htons(node->address.port);
57         sock_out.sin_family = PF_INET;
58         if (ctdb_ibw_get_address(node->ctdb, node->address.address, &sock_out.sin_addr)) {
59                 DEBUG(DEBUG_ERR, ("ctdb_ibw_node_connect failed\n"));
60                 return -1;
61         }
62
63         rc = ibw_connect(cn->conn, &sock_out, node);
64         if (rc) {
65                 DEBUG(DEBUG_ERR, ("ctdb_ibw_node_connect/ibw_connect failed - retrying...\n"));
66                 /* try again once a second */
67                 event_add_timed(node->ctdb->ev, node, timeval_current_ofs(1, 0), 
68                         ctdb_ibw_node_connect_event, node);
69         }
70
71         /* continues at ibw_ctdb.c/IBWC_CONNECTED in good case */
72         return 0;
73 }
74
75 void ctdb_ibw_node_connect_event(struct event_context *ev, struct timed_event *te, 
76         struct timeval t, void *private_data)
77 {
78         struct ctdb_node *node = talloc_get_type(private_data, struct ctdb_node);
79
80         ctdb_ibw_node_connect(node);
81 }
82
83 int ctdb_ibw_connstate_handler(struct ibw_ctx *ctx, struct ibw_conn *conn)
84 {
85         if (ctx!=NULL) {
86                 /* ctx->state changed */
87                 switch(ctx->state) {
88                 case IBWS_INIT: /* ctx start - after ibw_init */
89                         break;
90                 case IBWS_READY: /* after ibw_bind & ibw_listen */
91                         break;
92                 case IBWS_CONNECT_REQUEST: /* after [IBWS_READY + incoming request] */
93                                 /* => [(ibw_accept)IBWS_READY | (ibw_disconnect)STOPPED | ERROR] */
94                         if (ibw_accept(ctx, conn, NULL)) {
95                                 DEBUG(DEBUG_ERR, ("connstate_handler/ibw_accept failed\n"));
96                                 return -1;
97                         } /* else continue in IBWC_CONNECTED */
98                         break;
99                 case IBWS_STOPPED: /* normal stop <= ibw_disconnect+(IBWS_READY | IBWS_CONNECT_REQUEST) */
100                         /* TODO: have a CTDB upcall for which CTDB should wait in a (final) loop */
101                         break;
102                 case IBWS_ERROR: /* abnormal state; ibw_stop must be called after this */
103                         break;
104                 default:
105                         assert(0);
106                         break;
107                 }
108         }
109
110         if (conn!=NULL) {
111                 /* conn->state changed */
112                 switch(conn->state) {
113                 case IBWC_INIT: /* conn start - internal state */
114                         break;
115                 case IBWC_CONNECTED: { /* after ibw_accept or ibw_connect */
116                         struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
117                         if (node!=NULL) { /* after ibw_connect */
118                                 struct ctdb_ibw_node *cn = talloc_get_type(node->private_data, struct ctdb_ibw_node);
119
120                                 node->ctdb->upcalls->node_connected(node);
121                                 ctdb_flush_cn_queue(cn);
122                         } else { /* after ibw_accept */
123                                 /* NOP in CTDB case */
124                         }
125                 } break;
126                 case IBWC_DISCONNECTED: { /* after ibw_disconnect */
127                         struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
128                         if (node!=NULL)
129                                 node->ctdb->upcalls->node_dead(node);
130                         talloc_free(conn);
131                         /* normal + intended disconnect => not reconnecting in this layer */
132                 } break;
133                 case IBWC_ERROR: {
134                         struct ctdb_node *node = talloc_get_type(conn->conn_userdata, struct ctdb_node);
135                         if (node!=NULL) {
136                                 struct ctdb_ibw_node *cn = talloc_get_type(node->private_data, struct ctdb_ibw_node);
137                                 struct ibw_ctx *ictx = cn->conn->ctx;
138
139                                 DEBUG(DEBUG_DEBUG, ("IBWC_ERROR, reconnecting...\n"));
140                                 talloc_free(cn->conn); /* internal queue content is destroyed */
141                                 cn->conn = (void *)ibw_conn_new(ictx, node);
142                                 event_add_timed(node->ctdb->ev, node, timeval_current_ofs(1, 0),
143                                         ctdb_ibw_node_connect_event, node);
144                         }
145                 } break;
146                 default:
147                         assert(0);
148                         break;
149                 }
150         }
151
152         return 0;
153 }
154
155 int ctdb_ibw_receive_handler(struct ibw_conn *conn, void *buf, int n)
156 {
157         struct ctdb_context *ctdb = talloc_get_type(conn->ctx->ctx_userdata, struct ctdb_context);
158         void    *buf2; /* future TODO: a solution for removal of this */
159
160         assert(ctdb!=NULL);
161         assert(buf!=NULL);
162         assert(conn!=NULL);
163         assert(conn->state==IBWC_CONNECTED);
164
165         /* so far "buf" is an ib-registered memory area
166          * and being reused for next receive
167          * noticed that HL requires talloc-ed memory to be stolen */
168         buf2 = talloc_zero_size(conn, n);
169         CTDB_NO_MEMORY(ctdb, buf2);
170
171         memcpy(buf2, buf, n);
172
173         ctdb->upcalls->recv_pkt(ctdb, (uint8_t *)buf2, (uint32_t)n);
174
175         return 0;
176 }