mirror of
https://github.com/samba-team/samba.git
synced 2024-12-23 17:34:34 +03:00
32de198fd3
(This used to be ctdb commit f0555484105668c01c21f56322992e752e831109)
823 lines
21 KiB
C
823 lines
21 KiB
C
/*
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ctdb recovery code
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Copyright (C) Ronnie Sahlberg 2007
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Copyright (C) Andrew Tridgell 2007
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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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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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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 "includes.h"
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#include "lib/events/events.h"
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#include "lib/tdb/include/tdb.h"
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#include "lib/util/dlinklist.h"
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#include "system/network.h"
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#include "system/filesys.h"
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#include "system/wait.h"
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#include "../include/ctdb_private.h"
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#define TAKEOVER_TIMEOUT() timeval_current_ofs(ctdb->tunable.takeover_timeout,0)
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#define CTDB_ARP_INTERVAL 1
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#define CTDB_ARP_REPEAT 3
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struct ctdb_takeover_arp {
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struct ctdb_context *ctdb;
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uint32_t count;
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struct sockaddr_in sin;
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struct ctdb_tcp_list *tcp_list;
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};
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/*
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lists of tcp endpoints
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*/
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struct ctdb_tcp_list {
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struct ctdb_tcp_list *prev, *next;
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uint32_t vnn;
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struct sockaddr_in saddr;
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struct sockaddr_in daddr;
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};
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/*
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list of clients to kill on IP release
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*/
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struct ctdb_client_ip {
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struct ctdb_client_ip *prev, *next;
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struct ctdb_context *ctdb;
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struct sockaddr_in ip;
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uint32_t client_id;
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};
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/*
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send a gratuitous arp
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*/
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static void ctdb_control_send_arp(struct event_context *ev, struct timed_event *te,
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struct timeval t, void *private_data)
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{
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struct ctdb_takeover_arp *arp = talloc_get_type(private_data,
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struct ctdb_takeover_arp);
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int ret;
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struct ctdb_tcp_list *tcp;
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ret = ctdb_sys_send_arp(&arp->sin, arp->ctdb->takeover.interface);
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if (ret != 0) {
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DEBUG(0,(__location__ " sending of arp failed (%s)\n", strerror(errno)));
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}
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for (tcp=arp->tcp_list;tcp;tcp=tcp->next) {
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DEBUG(2,("sending tcp tickle ack for %u->%s:%u\n",
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(unsigned)ntohs(tcp->daddr.sin_port),
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inet_ntoa(tcp->saddr.sin_addr),
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(unsigned)ntohs(tcp->saddr.sin_port)));
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ret = ctdb_sys_send_tcp(&tcp->saddr, &tcp->daddr, 0, 0, 0);
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if (ret != 0) {
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DEBUG(0,(__location__ " Failed to send tcp tickle ack for %s\n",
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inet_ntoa(tcp->saddr.sin_addr)));
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}
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}
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arp->count++;
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if (arp->count == CTDB_ARP_REPEAT) {
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talloc_free(arp);
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return;
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}
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event_add_timed(arp->ctdb->ev, arp->ctdb->takeover.last_ctx,
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timeval_current_ofs(CTDB_ARP_INTERVAL, 0),
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ctdb_control_send_arp, arp);
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}
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struct takeover_callback_state {
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struct ctdb_req_control *c;
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struct sockaddr_in *sin;
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};
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/*
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called when takeip event finishes
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*/
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static void takeover_ip_callback(struct ctdb_context *ctdb, int status,
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void *private_data)
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{
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struct takeover_callback_state *state =
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talloc_get_type(private_data, struct takeover_callback_state);
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struct ctdb_takeover_arp *arp;
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char *ip = inet_ntoa(state->sin->sin_addr);
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struct ctdb_tcp_list *tcp;
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ctdb_start_monitoring(ctdb);
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if (status != 0) {
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DEBUG(0,(__location__ " Failed to takeover IP %s on interface %s\n",
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ip, ctdb->takeover.interface));
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ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
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talloc_free(state);
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return;
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}
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if (!ctdb->takeover.last_ctx) {
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ctdb->takeover.last_ctx = talloc_new(ctdb);
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if (!ctdb->takeover.last_ctx) goto failed;
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}
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arp = talloc_zero(ctdb->takeover.last_ctx, struct ctdb_takeover_arp);
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if (!arp) goto failed;
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arp->ctdb = ctdb;
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arp->sin = *state->sin;
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/* add all of the known tcp connections for this IP to the
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list of tcp connections to send tickle acks for */
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for (tcp=ctdb->tcp_list;tcp;tcp=tcp->next) {
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if (state->sin->sin_addr.s_addr == tcp->daddr.sin_addr.s_addr) {
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struct ctdb_tcp_list *t2 = talloc(arp, struct ctdb_tcp_list);
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if (t2 == NULL) goto failed;
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*t2 = *tcp;
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DLIST_ADD(arp->tcp_list, t2);
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}
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}
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event_add_timed(arp->ctdb->ev, arp->ctdb->takeover.last_ctx,
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timeval_zero(), ctdb_control_send_arp, arp);
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/* the control succeeded */
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ctdb_request_control_reply(ctdb, state->c, NULL, 0, NULL);
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talloc_free(state);
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return;
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failed:
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ctdb_request_control_reply(ctdb, state->c, NULL, -1, NULL);
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talloc_free(state);
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return;
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}
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/*
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take over an ip address
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*/
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int32_t ctdb_control_takeover_ip(struct ctdb_context *ctdb,
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struct ctdb_req_control *c,
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TDB_DATA indata,
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bool *async_reply)
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{
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int ret;
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struct takeover_callback_state *state;
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struct ctdb_public_ip *pip = (struct ctdb_public_ip *)indata.dptr;
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char *ip = inet_ntoa(pip->sin.sin_addr);
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/* update out node table */
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ctdb->nodes[pip->vnn]->takeover_vnn = pip->takeover_vnn;
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/* if our kernel already has this IP, do nothing */
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if (ctdb_sys_have_ip(ip)) {
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return 0;
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}
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state = talloc(ctdb, struct takeover_callback_state);
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CTDB_NO_MEMORY(ctdb, state);
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state->c = talloc_steal(ctdb, c);
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state->sin = talloc(ctdb, struct sockaddr_in);
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CTDB_NO_MEMORY(ctdb, state->sin);
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*state->sin = pip->sin;
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DEBUG(0,("Takover of IP %s/%u on interface %s\n",
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ip, ctdb->nodes[ctdb->vnn]->public_netmask_bits,
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ctdb->takeover.interface));
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ctdb_stop_monitoring(ctdb);
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ret = ctdb_event_script_callback(ctdb,
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timeval_current_ofs(ctdb->tunable.script_timeout, 0),
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state, takeover_ip_callback, state,
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"takeip %s %s %u",
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ctdb->takeover.interface,
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ip,
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ctdb->nodes[ctdb->vnn]->public_netmask_bits);
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if (ret != 0) {
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DEBUG(0,(__location__ " Failed to takeover IP %s on interface %s\n",
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ip, ctdb->takeover.interface));
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talloc_free(state);
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return -1;
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}
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/* tell ctdb_control.c that we will be replying asynchronously */
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*async_reply = true;
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return 0;
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}
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/*
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kill any clients that are registered with a IP that is being released
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*/
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static void release_kill_clients(struct ctdb_context *ctdb, struct in_addr in)
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{
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struct ctdb_client_ip *ip;
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for (ip=ctdb->client_ip_list; ip; ip=ip->next) {
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if (ip->ip.sin_addr.s_addr == in.s_addr) {
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struct ctdb_client *client = ctdb_reqid_find(ctdb,
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ip->client_id,
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struct ctdb_client);
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if (client->pid != 0) {
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DEBUG(0,(__location__ " Killing client pid %u for IP %s on client_id %u\n",
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(unsigned)client->pid, inet_ntoa(in),
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ip->client_id));
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kill(client->pid, SIGKILL);
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}
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}
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}
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}
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/*
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called when releaseip event finishes
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*/
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static void release_ip_callback(struct ctdb_context *ctdb, int status,
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void *private_data)
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{
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struct takeover_callback_state *state =
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talloc_get_type(private_data, struct takeover_callback_state);
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char *ip = inet_ntoa(state->sin->sin_addr);
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TDB_DATA data;
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struct ctdb_tcp_list *tcp;
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ctdb_start_monitoring(ctdb);
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/* send a message to all clients of this node telling them
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that the cluster has been reconfigured and they should
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release any sockets on this IP */
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data.dptr = (uint8_t *)ip;
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data.dsize = strlen(ip)+1;
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ctdb_daemon_send_message(ctdb, ctdb->vnn, CTDB_SRVID_RELEASE_IP, data);
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/* kill clients that have registered with this IP */
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release_kill_clients(ctdb, state->sin->sin_addr);
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/* tell other nodes about any tcp connections we were holding with this IP */
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for (tcp=ctdb->tcp_list;tcp;tcp=tcp->next) {
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if (tcp->vnn == ctdb->vnn &&
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state->sin->sin_addr.s_addr == tcp->daddr.sin_addr.s_addr) {
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struct ctdb_control_tcp_vnn t;
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t.vnn = ctdb->vnn;
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t.src = tcp->saddr;
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t.dest = tcp->daddr;
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data.dptr = (uint8_t *)&t;
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data.dsize = sizeof(t);
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ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_CONNECTED, 0,
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CTDB_CONTROL_TCP_ADD,
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0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
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}
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}
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/* the control succeeded */
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ctdb_request_control_reply(ctdb, state->c, NULL, 0, NULL);
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talloc_free(state);
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}
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/*
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release an ip address
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*/
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int32_t ctdb_control_release_ip(struct ctdb_context *ctdb,
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struct ctdb_req_control *c,
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TDB_DATA indata,
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bool *async_reply)
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{
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int ret;
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struct takeover_callback_state *state;
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struct ctdb_public_ip *pip = (struct ctdb_public_ip *)indata.dptr;
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char *ip = inet_ntoa(pip->sin.sin_addr);
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/* update out node table */
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ctdb->nodes[pip->vnn]->takeover_vnn = pip->takeover_vnn;
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if (!ctdb_sys_have_ip(ip)) {
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return 0;
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}
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DEBUG(0,("Release of IP %s/%u on interface %s\n",
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ip, ctdb->nodes[ctdb->vnn]->public_netmask_bits,
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ctdb->takeover.interface));
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/* stop any previous arps */
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talloc_free(ctdb->takeover.last_ctx);
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ctdb->takeover.last_ctx = NULL;
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state = talloc(ctdb, struct takeover_callback_state);
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CTDB_NO_MEMORY(ctdb, state);
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state->c = talloc_steal(state, c);
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state->sin = talloc(state, struct sockaddr_in);
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CTDB_NO_MEMORY(ctdb, state->sin);
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*state->sin = pip->sin;
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ctdb_stop_monitoring(ctdb);
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ret = ctdb_event_script_callback(ctdb,
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timeval_current_ofs(ctdb->tunable.script_timeout, 0),
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state, release_ip_callback, state,
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"releaseip %s %s %u",
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ctdb->takeover.interface,
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ip,
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ctdb->nodes[ctdb->vnn]->public_netmask_bits);
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if (ret != 0) {
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DEBUG(0,(__location__ " Failed to release IP %s on interface %s\n",
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ip, ctdb->takeover.interface));
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talloc_free(state);
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return -1;
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}
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/* tell the control that we will be reply asynchronously */
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*async_reply = true;
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return 0;
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}
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/*
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setup the event script
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*/
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int ctdb_set_event_script(struct ctdb_context *ctdb, const char *script)
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{
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ctdb->takeover.event_script = talloc_strdup(ctdb, script);
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CTDB_NO_MEMORY(ctdb, ctdb->takeover.event_script);
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return 0;
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}
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/*
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setup the public address list from a file
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*/
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int ctdb_set_public_addresses(struct ctdb_context *ctdb, const char *alist)
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{
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char **lines;
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int nlines;
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int i;
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lines = file_lines_load(alist, &nlines, ctdb);
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if (lines == NULL) {
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ctdb_set_error(ctdb, "Failed to load public address list '%s'\n", alist);
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return -1;
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}
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while (nlines > 0 && strcmp(lines[nlines-1], "") == 0) {
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nlines--;
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}
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if (nlines != ctdb->num_nodes) {
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DEBUG(0,("Number of lines in %s does not match number of nodes!\n", alist));
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talloc_free(lines);
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return -1;
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}
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for (i=0;i<nlines;i++) {
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char *p;
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struct in_addr in;
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ctdb->nodes[i]->public_address = talloc_strdup(ctdb->nodes[i], lines[i]);
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CTDB_NO_MEMORY(ctdb, ctdb->nodes[i]->public_address);
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ctdb->nodes[i]->takeover_vnn = -1;
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/* see if they supplied a netmask length */
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p = strchr(ctdb->nodes[i]->public_address, '/');
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if (!p) {
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DEBUG(0,("You must supply a netmask for public address %s\n",
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ctdb->nodes[i]->public_address));
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return -1;
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}
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*p = 0;
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ctdb->nodes[i]->public_netmask_bits = atoi(p+1);
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if (ctdb->nodes[i]->public_netmask_bits > 32) {
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DEBUG(0, ("Illegal netmask for IP %s\n", ctdb->nodes[i]->public_address));
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return -1;
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}
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if (inet_aton(ctdb->nodes[i]->public_address, &in) == 0) {
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DEBUG(0,("Badly formed IP '%s' in public address list\n", ctdb->nodes[i]->public_address));
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return -1;
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}
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}
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talloc_free(lines);
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return 0;
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}
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/*
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see if two IPs are on the same subnet
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*/
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static bool ctdb_same_subnet(const char *ip1, const char *ip2, uint8_t netmask_bits)
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{
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struct in_addr in1, in2;
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uint32_t mask;
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inet_aton(ip1, &in1);
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inet_aton(ip2, &in2);
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mask = ~((1LL<<(32-netmask_bits))-1);
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if ((ntohl(in1.s_addr) & mask) != (ntohl(in2.s_addr) & mask)) {
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return false;
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}
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return true;
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}
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/*
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try to find an available node to take a given nodes IP that meets the
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criterion given by the flags
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*/
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static void ctdb_takeover_find_node(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
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int start_node, uint32_t mask_flags)
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{
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int j;
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for (j=(start_node+1)%nodemap->num;
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j != start_node;
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j=(j+1)%nodemap->num) {
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if (!(nodemap->nodes[j].flags & mask_flags) &&
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ctdb_same_subnet(ctdb->nodes[j]->public_address,
|
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ctdb->nodes[start_node]->public_address,
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ctdb->nodes[j]->public_netmask_bits)) {
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ctdb->nodes[start_node]->takeover_vnn = nodemap->nodes[j].vnn;
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break;
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}
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}
|
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}
|
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|
|
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/*
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make any IP alias changes for public addresses that are necessary
|
|
*/
|
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int ctdb_takeover_run(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap)
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{
|
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int i, j;
|
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int ret;
|
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struct ctdb_public_ip ip;
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|
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ZERO_STRUCT(ip);
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|
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/* Work out which node will look after each public IP.
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* takeover_node cycles over the nodes and is incremented each time a
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* node has been assigned to take over for another node.
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* This spreads the failed nodes out across the remaining
|
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* nodes more evenly
|
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*/
|
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for (i=0;i<nodemap->num;i++) {
|
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if (!(nodemap->nodes[i].flags & (NODE_FLAGS_INACTIVE|NODE_FLAGS_DISABLED))) {
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ctdb->nodes[i]->takeover_vnn = nodemap->nodes[i].vnn;
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} else {
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ctdb->nodes[i]->takeover_vnn = (uint32_t)-1;
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|
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ctdb_takeover_find_node(ctdb, nodemap, i, NODE_FLAGS_INACTIVE|NODE_FLAGS_DISABLED);
|
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|
|
/* if no enabled node can take it, then we
|
|
might as well use any active node. It
|
|
probably means that some subsystem (such as
|
|
NFS) is sick on all nodes. Best we can do
|
|
is to keep the other services up. */
|
|
if (ctdb->nodes[i]->takeover_vnn == (uint32_t)-1) {
|
|
ctdb_takeover_find_node(ctdb, nodemap, i, NODE_FLAGS_INACTIVE);
|
|
}
|
|
|
|
if (ctdb->nodes[i]->takeover_vnn == (uint32_t)-1) {
|
|
DEBUG(0,(__location__ " No node available on same network to take %s\n",
|
|
ctdb->nodes[i]->public_address));
|
|
}
|
|
}
|
|
}
|
|
|
|
/* at this point ctdb->nodes[i]->takeover_vnn is the vnn which will own each IP */
|
|
|
|
/* now tell all nodes to delete any alias that they should not
|
|
have. This will be a NOOP on nodes that don't currently
|
|
hold the given alias */
|
|
for (i=0;i<nodemap->num;i++) {
|
|
/* don't talk to unconnected nodes, but do talk to banned nodes */
|
|
if (nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
|
|
continue;
|
|
}
|
|
|
|
/* tell this node to delete all of the aliases that it should not have */
|
|
for (j=0;j<nodemap->num;j++) {
|
|
if (ctdb->nodes[j]->takeover_vnn != nodemap->nodes[i].vnn) {
|
|
ip.vnn = j;
|
|
ip.takeover_vnn = ctdb->nodes[j]->takeover_vnn;
|
|
ip.sin.sin_family = AF_INET;
|
|
inet_aton(ctdb->nodes[j]->public_address, &ip.sin.sin_addr);
|
|
|
|
ret = ctdb_ctrl_release_ip(ctdb, TAKEOVER_TIMEOUT(),
|
|
nodemap->nodes[i].vnn,
|
|
&ip);
|
|
if (ret != 0) {
|
|
DEBUG(0,("Failed to tell vnn %u to release IP %s\n",
|
|
nodemap->nodes[i].vnn,
|
|
ctdb->nodes[j]->public_address));
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* tell all nodes to get their own IPs */
|
|
for (i=0;i<nodemap->num;i++) {
|
|
if (ctdb->nodes[i]->takeover_vnn == -1) {
|
|
/* this IP won't be taken over */
|
|
continue;
|
|
}
|
|
ip.vnn = i;
|
|
ip.takeover_vnn = ctdb->nodes[i]->takeover_vnn;
|
|
ip.sin.sin_family = AF_INET;
|
|
inet_aton(ctdb->nodes[i]->public_address, &ip.sin.sin_addr);
|
|
|
|
ret = ctdb_ctrl_takeover_ip(ctdb, TAKEOVER_TIMEOUT(),
|
|
ctdb->nodes[i]->takeover_vnn,
|
|
&ip);
|
|
if (ret != 0) {
|
|
DEBUG(0,("Failed asking vnn %u to take over IP %s\n",
|
|
ctdb->nodes[i]->takeover_vnn,
|
|
ctdb->nodes[i]->public_address));
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
destroy a ctdb_client_ip structure
|
|
*/
|
|
static int ctdb_client_ip_destructor(struct ctdb_client_ip *ip)
|
|
{
|
|
DLIST_REMOVE(ip->ctdb->client_ip_list, ip);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
called by a client to inform us of a TCP connection that it is managing
|
|
that should tickled with an ACK when IP takeover is done
|
|
*/
|
|
int32_t ctdb_control_tcp_client(struct ctdb_context *ctdb, uint32_t client_id, uint32_t vnn,
|
|
TDB_DATA indata)
|
|
{
|
|
struct ctdb_client *client = ctdb_reqid_find(ctdb, client_id, struct ctdb_client);
|
|
struct ctdb_control_tcp *p = (struct ctdb_control_tcp *)indata.dptr;
|
|
struct ctdb_tcp_list *tcp;
|
|
struct ctdb_control_tcp_vnn t;
|
|
int ret;
|
|
TDB_DATA data;
|
|
struct ctdb_client_ip *ip;
|
|
|
|
ip = talloc(client, struct ctdb_client_ip);
|
|
CTDB_NO_MEMORY(ctdb, ip);
|
|
|
|
ip->ctdb = ctdb;
|
|
ip->ip = p->dest;
|
|
ip->client_id = client_id;
|
|
talloc_set_destructor(ip, ctdb_client_ip_destructor);
|
|
DLIST_ADD(ctdb->client_ip_list, ip);
|
|
|
|
tcp = talloc(client, struct ctdb_tcp_list);
|
|
CTDB_NO_MEMORY(ctdb, tcp);
|
|
|
|
tcp->vnn = vnn;
|
|
tcp->saddr = p->src;
|
|
tcp->daddr = p->dest;
|
|
|
|
DLIST_ADD(client->tcp_list, tcp);
|
|
|
|
t.vnn = vnn;
|
|
t.src = p->src;
|
|
t.dest = p->dest;
|
|
|
|
data.dptr = (uint8_t *)&t;
|
|
data.dsize = sizeof(t);
|
|
|
|
/* tell all nodes about this tcp connection */
|
|
ret = ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_CONNECTED, 0,
|
|
CTDB_CONTROL_TCP_ADD,
|
|
0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
|
|
if (ret != 0) {
|
|
DEBUG(0,(__location__ " Failed to send CTDB_CONTROL_TCP_ADD\n"));
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
see if two sockaddr_in are the same
|
|
*/
|
|
static bool same_sockaddr_in(struct sockaddr_in *in1, struct sockaddr_in *in2)
|
|
{
|
|
return in1->sin_family == in2->sin_family &&
|
|
in1->sin_port == in2->sin_port &&
|
|
in1->sin_addr.s_addr == in2->sin_addr.s_addr;
|
|
}
|
|
|
|
/*
|
|
find a tcp address on a list
|
|
*/
|
|
static struct ctdb_tcp_list *ctdb_tcp_find(struct ctdb_tcp_list *list,
|
|
struct ctdb_tcp_list *tcp)
|
|
{
|
|
while (list) {
|
|
if (same_sockaddr_in(&list->saddr, &tcp->saddr) &&
|
|
same_sockaddr_in(&list->daddr, &tcp->daddr)) {
|
|
return list;
|
|
}
|
|
list = list->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
called by a daemon to inform us of a TCP connection that one of its
|
|
clients managing that should tickled with an ACK when IP takeover is
|
|
done
|
|
*/
|
|
int32_t ctdb_control_tcp_add(struct ctdb_context *ctdb, TDB_DATA indata)
|
|
{
|
|
struct ctdb_control_tcp_vnn *p = (struct ctdb_control_tcp_vnn *)indata.dptr;
|
|
struct ctdb_tcp_list *tcp;
|
|
|
|
tcp = talloc(ctdb, struct ctdb_tcp_list);
|
|
CTDB_NO_MEMORY(ctdb, tcp);
|
|
|
|
tcp->vnn = p->vnn;
|
|
tcp->saddr = p->src;
|
|
tcp->daddr = p->dest;
|
|
|
|
if (NULL == ctdb_tcp_find(ctdb->tcp_list, tcp)) {
|
|
DLIST_ADD(ctdb->tcp_list, tcp);
|
|
DEBUG(2,("Added tickle info for %s:%u from vnn %u\n",
|
|
inet_ntoa(tcp->daddr.sin_addr), ntohs(tcp->daddr.sin_port),
|
|
tcp->vnn));
|
|
} else {
|
|
DEBUG(4,("Already had tickle info for %s:%u from vnn %u\n",
|
|
inet_ntoa(tcp->daddr.sin_addr), ntohs(tcp->daddr.sin_port),
|
|
tcp->vnn));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
called by a daemon to inform us of a TCP connection that one of its
|
|
clients managing that should tickled with an ACK when IP takeover is
|
|
done
|
|
*/
|
|
int32_t ctdb_control_tcp_remove(struct ctdb_context *ctdb, TDB_DATA indata)
|
|
{
|
|
struct ctdb_control_tcp_vnn *p = (struct ctdb_control_tcp_vnn *)indata.dptr;
|
|
struct ctdb_tcp_list t, *tcp;
|
|
|
|
t.vnn = p->vnn;
|
|
t.saddr = p->src;
|
|
t.daddr = p->dest;
|
|
|
|
tcp = ctdb_tcp_find(ctdb->tcp_list, &t);
|
|
if (tcp) {
|
|
DEBUG(2,("Removed tickle info for %s:%u from vnn %u\n",
|
|
inet_ntoa(tcp->daddr.sin_addr), ntohs(tcp->daddr.sin_port),
|
|
tcp->vnn));
|
|
DLIST_REMOVE(ctdb->tcp_list, tcp);
|
|
talloc_free(tcp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
called when a daemon restarts - wipes all tcp entries from that vnn
|
|
*/
|
|
int32_t ctdb_control_startup(struct ctdb_context *ctdb, uint32_t vnn)
|
|
{
|
|
struct ctdb_tcp_list *tcp, *next;
|
|
for (tcp=ctdb->tcp_list;tcp;tcp=next) {
|
|
next = tcp->next;
|
|
if (tcp->vnn == vnn) {
|
|
DLIST_REMOVE(ctdb->tcp_list, tcp);
|
|
talloc_free(tcp);
|
|
}
|
|
|
|
/* and tell the new guy about any that he should have
|
|
from us */
|
|
if (tcp->vnn == ctdb->vnn) {
|
|
struct ctdb_control_tcp_vnn t;
|
|
TDB_DATA data;
|
|
|
|
t.vnn = tcp->vnn;
|
|
t.src = tcp->saddr;
|
|
t.dest = tcp->daddr;
|
|
|
|
data.dptr = (uint8_t *)&t;
|
|
data.dsize = sizeof(t);
|
|
|
|
ctdb_daemon_send_control(ctdb, vnn, 0,
|
|
CTDB_CONTROL_TCP_ADD,
|
|
0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
called when a client structure goes away - hook to remove
|
|
elements from the tcp_list in all daemons
|
|
*/
|
|
void ctdb_takeover_client_destructor_hook(struct ctdb_client *client)
|
|
{
|
|
while (client->tcp_list) {
|
|
TDB_DATA data;
|
|
struct ctdb_control_tcp_vnn p;
|
|
struct ctdb_tcp_list *tcp = client->tcp_list;
|
|
DLIST_REMOVE(client->tcp_list, tcp);
|
|
p.vnn = tcp->vnn;
|
|
p.src = tcp->saddr;
|
|
p.dest = tcp->daddr;
|
|
data.dptr = (uint8_t *)&p;
|
|
data.dsize = sizeof(p);
|
|
ctdb_daemon_send_control(client->ctdb, CTDB_BROADCAST_CONNECTED, 0,
|
|
CTDB_CONTROL_TCP_REMOVE,
|
|
0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
|
|
talloc_free(tcp);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
release all IPs on shutdown
|
|
*/
|
|
void ctdb_release_all_ips(struct ctdb_context *ctdb)
|
|
{
|
|
int i;
|
|
|
|
if (!ctdb->takeover.enabled) {
|
|
return;
|
|
}
|
|
|
|
for (i=0;i<ctdb->num_nodes;i++) {
|
|
struct ctdb_node *node = ctdb->nodes[i];
|
|
if (ctdb_sys_have_ip(node->public_address)) {
|
|
struct in_addr in;
|
|
ctdb_event_script(ctdb, "releaseip %s %s %u",
|
|
ctdb->takeover.interface,
|
|
node->public_address,
|
|
node->public_netmask_bits);
|
|
if (inet_aton(node->public_address, &in) != 0) {
|
|
release_kill_clients(ctdb, in);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
get list of public IPs
|
|
*/
|
|
int32_t ctdb_control_get_public_ips(struct ctdb_context *ctdb, struct ctdb_req_control *c, TDB_DATA *outdata)
|
|
{
|
|
int i, len;
|
|
struct ctdb_all_public_ips *ips;
|
|
|
|
len = offsetof(struct ctdb_all_public_ips, ips) + ctdb->num_nodes*sizeof(struct ctdb_public_ip);
|
|
|
|
ips = talloc_zero_size(outdata, len);
|
|
CTDB_NO_MEMORY(ctdb, ips);
|
|
|
|
outdata->dsize = len;
|
|
outdata->dptr = (uint8_t *)ips;
|
|
|
|
ips->num = ctdb->num_nodes;
|
|
for(i=0;i<ctdb->num_nodes;i++){
|
|
ips->ips[i].vnn = i;
|
|
ips->ips[i].takeover_vnn = ctdb->nodes[i]->takeover_vnn;
|
|
ips->ips[i].sin.sin_family = AF_INET;
|
|
if (ctdb->nodes[i]->public_address) {
|
|
inet_aton(ctdb->nodes[i]->public_address, &ips->ips[i].sin.sin_addr);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|