X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/2f5b811429a2690c2ce44d09cc571c3230420c1b..32fbf3a470fbdf9eac60eae6b14b7ecc99990a03:/cluster.c diff --git a/cluster.c b/cluster.c index fdfe2dd..2a5e6e3 100644 --- a/cluster.c +++ b/cluster.c @@ -1,6 +1,6 @@ // L2TPNS Clustering Stuff -char const *cvs_id_cluster = "$Id: cluster.c,v 1.19 2004-11-29 02:17:17 bodea Exp $"; +char const *cvs_id_cluster = "$Id: cluster.c,v 1.22 2004-12-13 05:09:55 bodea Exp $"; #include #include @@ -81,7 +81,7 @@ int cluster_init() struct sockaddr_in interface_addr; struct ip_mreq mreq; struct ifreq ifr; - int opt = 0; + int opt; config->cluster_undefined_sessions = MAXSESSION-1; config->cluster_undefined_tunnels = MAXTUNNEL-1; @@ -99,6 +99,9 @@ int cluster_init() addr.sin_addr.s_addr = INADDR_ANY; setsockopt(cluster_sockfd, SOL_SOCKET, SO_REUSEADDR, &addr, sizeof(addr)); + opt = fcntl(cluster_sockfd, F_GETFL, 0); + fcntl(cluster_sockfd, F_SETFL, opt | O_NONBLOCK); + if (bind(cluster_sockfd, (void *) &addr, sizeof(addr)) < 0) { LOG(0, 0, 0, "Failed to bind cluster socket: %s\n", strerror(errno)); @@ -129,7 +132,7 @@ int cluster_init() return -1; } - if (setsockopt (cluster_sockfd, IPPROTO_IP, IP_MULTICAST_IF, &interface_addr, sizeof(interface_addr)) < 0) + if (setsockopt(cluster_sockfd, IPPROTO_IP, IP_MULTICAST_IF, &interface_addr, sizeof(interface_addr)) < 0) { LOG(0, 0, 0, "Failed to setsockopt (set mcast interface): %s\n", strerror(errno)); return -1; @@ -744,6 +747,8 @@ void cluster_heartbeat() if (!config->cluster_iam_master) // Only the master does this. return; + config->cluster_table_version += config->cluster_num_changes; + // Fill out the heartbeat header. memset(&h, 0, sizeof(h)); @@ -759,6 +764,7 @@ void cluster_heartbeat() h.size_tunn = sizeof(tunnelt); h.interval = config->cluster_hb_interval; h.timeout = config->cluster_hb_timeout; + h.table_version = config->cluster_table_version; add_type(&p, C_HEARTBEAT, HB_VERSION, (char*) &h, sizeof(h)); @@ -817,8 +823,10 @@ void cluster_heartbeat() exit(1); } - LOG(3, 0, 0, "Sending heartbeat #%d with %d changes (%d x-sess, %d x-tunnels, %d highsess, %d hightun, size %d)\n", - h.seq, config->cluster_num_changes, count, tcount, config->cluster_highest_sessionid, + LOG(3, 0, 0, "Sending v%d heartbeat #%d, change #%llu with %d changes " + "(%d x-sess, %d x-tunnels, %d highsess, %d hightun, size %d)\n", + HB_VERSION, h.seq, h.table_version, config->cluster_num_changes, + count, tcount, config->cluster_highest_sessionid, config->cluster_highest_tunnelid, (p-buff)); config->cluster_num_changes = 0; @@ -891,7 +899,7 @@ static int cluster_catchup_slave(int seq, u32 slave) diff += HB_MAX_SEQ; if (diff >= HB_HISTORY_SIZE) { // Ouch. We don't have the packet to send it! - LOG(0, 0, 0, "A slaved asked for message %d when our seq number is %d. Killing it.\n", + LOG(0, 0, 0, "A slave asked for message %d when our seq number is %d. Killing it.\n", seq, config->cluster_seq_number); return peer_send_message(slave, C_KILL, seq, NULL, 0);// Kill the slave. Nothing else to do. } @@ -1096,18 +1104,20 @@ static int cluster_recv_tunnel(int more, u8 *p) // // Process a heartbeat.. // +// v3: added interval, timeout +// v4: added table_version static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32 addr) { heartt * h; int s = size - (p-data); int i, type; -#if HB_VERSION != 3 +#if HB_VERSION != 4 # error "need to update cluster_process_heartbeat()" #endif - // we handle version 2+ - if (more < 2 || more > HB_VERSION) { + // we handle versions 3 through 4 + if (more < 3 || more > HB_VERSION) { LOG(0, 0, 0, "Received a heartbeat version that I don't support (%d)!\n", more); return -1; // Ignore it?? } @@ -1126,13 +1136,20 @@ static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32 if (config->cluster_iam_master) { // Sanity... // Note that this MUST match the election process above! - LOG(0, 0, 0, "I just got a packet claiming to be from a master but _I_ am the master!\n"); + LOG(0, 0, 0, "I just got a heartbeat from master %s, but _I_ am the master!\n", fmtaddr(addr, 0)); if (!h->basetime) { - LOG(0, 0, 0, "Heartbeat from addr %s with zero basetime!\n", fmtaddr(addr, 0)); + LOG(0, 0, 0, "Heartbeat with zero basetime! Ignoring\n"); return -1; // Skip it. } + if (more >= 4 && h->table_version > config->cluster_table_version) { + LOG(0, 0, 0, "They've seen more state changes (%llu vs my %llu) so I'm gone!\n", + h->table_version, config->cluster_table_version); + + kill(0, SIGTERM); + exit(1); + } if (basetime > h->basetime) { - LOG(0, 0, 0, "They're (%s) an older master than me so I'm gone!\n", fmtaddr(addr, 0)); + LOG(0, 0, 0, "They're an older master than me so I'm gone!\n"); kill(0, SIGTERM); exit(1); } @@ -1173,23 +1190,20 @@ static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32 // that the free session pointer is correct. cluster_check_sessions(h->highsession, h->freesession, h->hightunnel); - if (more > 2) // reserved section of heartt was not initialized prior to v3 + if (h->interval != config->cluster_hb_interval) { - if (h->interval != config->cluster_hb_interval) - { - LOG(2, 0, 0, "Master set ping/heartbeat interval to %u (was %u)\n", - h->interval, config->cluster_hb_interval); + LOG(2, 0, 0, "Master set ping/heartbeat interval to %u (was %u)\n", + h->interval, config->cluster_hb_interval); - config->cluster_hb_interval = h->interval; - } + config->cluster_hb_interval = h->interval; + } - if (h->timeout != config->cluster_hb_timeout) - { - LOG(2, 0, 0, "Master set heartbeat timeout to %u (was %u)\n", - h->timeout, config->cluster_hb_timeout); + if (h->timeout != config->cluster_hb_timeout) + { + LOG(2, 0, 0, "Master set heartbeat timeout to %u (was %u)\n", + h->timeout, config->cluster_hb_timeout); - config->cluster_hb_timeout = h->timeout; - } + config->cluster_hb_timeout = h->timeout; } // Ok. process the packet... @@ -1273,6 +1287,7 @@ static int cluster_process_heartbeat(u8 * data, int size, int more, u8 * p, u32 } config->cluster_last_hb = TIME; // Successfully received a heartbeat! + config->cluster_table_version = h->table_version; return 0; shortpacket: @@ -1414,10 +1429,12 @@ int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc) : "Not defined", 0.1 * (TIME - config->cluster_last_hb)); cli_print(cli, "Uptodate : %s", config->cluster_iam_uptodate ? "Yes" : "No"); + cli_print(cli, "Table version # : %llu", config->cluster_table_version); cli_print(cli, "Next sequence number expected: %d", config->cluster_seq_number); cli_print(cli, "%d sessions undefined of %d", config->cluster_undefined_sessions, config->cluster_highest_sessionid); cli_print(cli, "%d tunnels undefined of %d", config->cluster_undefined_tunnels, config->cluster_highest_tunnelid); } else { + cli_print(cli, "Table version # : %llu", config->cluster_table_version); cli_print(cli, "Next heartbeat # : %d", config->cluster_seq_number); cli_print(cli, "Highest session : %d", config->cluster_highest_sessionid); cli_print(cli, "Highest tunnel : %d", config->cluster_highest_tunnelid);