4 Copyright (C) Ronnie Sahlberg 2007
5 Copyright (C) Andrew Tridgell 2007
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include "lib/events/events.h"
22 #include "lib/tdb/include/tdb.h"
23 #include "lib/util/dlinklist.h"
24 #include "system/network.h"
25 #include "system/filesys.h"
26 #include "system/wait.h"
27 #include "../include/ctdb_private.h"
28 #include "../common/rb_tree.h"
31 #define TAKEOVER_TIMEOUT() timeval_current_ofs(ctdb->tunable.takeover_timeout,0)
33 #define CTDB_ARP_INTERVAL 1
34 #define CTDB_ARP_REPEAT 3
36 struct ctdb_takeover_arp {
37 struct ctdb_context *ctdb;
39 struct sockaddr_in sin;
40 struct ctdb_tcp_array *tcparray;
46 lists of tcp endpoints
48 struct ctdb_tcp_list {
49 struct ctdb_tcp_list *prev, *next;
50 struct ctdb_tcp_connection connection;
54 list of clients to kill on IP release
56 struct ctdb_client_ip {
57 struct ctdb_client_ip *prev, *next;
58 struct ctdb_context *ctdb;
59 struct sockaddr_in ip;
67 static void ctdb_control_send_arp(struct event_context *ev, struct timed_event *te,
68 struct timeval t, void *private_data)
70 struct ctdb_takeover_arp *arp = talloc_get_type(private_data,
71 struct ctdb_takeover_arp);
73 struct ctdb_tcp_array *tcparray;
76 ret = ctdb_sys_send_arp(&arp->sin, arp->vnn->iface);
78 DEBUG(0,(__location__ " sending of arp failed (%s)\n", strerror(errno)));
81 s = ctdb_sys_open_sending_socket();
83 DEBUG(0,(__location__ " failed to open raw socket for sending tickles\n"));
87 tcparray = arp->tcparray;
89 for (i=0;i<tcparray->num;i++) {
90 DEBUG(2,("sending tcp tickle ack for %u->%s:%u\n",
91 (unsigned)ntohs(tcparray->connections[i].daddr.sin_port),
92 inet_ntoa(tcparray->connections[i].saddr.sin_addr),
93 (unsigned)ntohs(tcparray->connections[i].saddr.sin_port)));
94 ret = ctdb_sys_send_tcp(s, &tcparray->connections[i].saddr,
95 &tcparray->connections[i].daddr, 0, 0, 0);
97 DEBUG(0,(__location__ " Failed to send tcp tickle ack for %s\n",
98 inet_ntoa(tcparray->connections[i].saddr.sin_addr)));
106 if (arp->count == CTDB_ARP_REPEAT) {
111 event_add_timed(arp->ctdb->ev, arp->vnn->takeover_ctx,
112 timeval_current_ofs(CTDB_ARP_INTERVAL, 0),
113 ctdb_control_send_arp, arp);
116 struct takeover_callback_state {
117 struct ctdb_req_control *c;
118 struct sockaddr_in *sin;
119 struct ctdb_vnn *vnn;
123 called when takeip event finishes
125 static void takeover_ip_callback(struct ctdb_context *ctdb, int status,
128 struct takeover_callback_state *state =
129 talloc_get_type(private_data, struct takeover_callback_state);
130 struct ctdb_takeover_arp *arp;
131 char *ip = inet_ntoa(state->sin->sin_addr);
132 struct ctdb_tcp_array *tcparray;
134 ctdb_enable_monitoring(ctdb);
137 DEBUG(0,(__location__ " Failed to takeover IP %s on interface %s\n",
138 ip, state->vnn->iface));
139 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
144 if (!state->vnn->takeover_ctx) {
145 state->vnn->takeover_ctx = talloc_new(ctdb);
146 if (!state->vnn->takeover_ctx) {
151 arp = talloc_zero(state->vnn->takeover_ctx, struct ctdb_takeover_arp);
152 if (!arp) goto failed;
155 arp->sin = *state->sin;
156 arp->vnn = state->vnn;
158 tcparray = state->vnn->tcp_array;
160 /* add all of the known tcp connections for this IP to the
161 list of tcp connections to send tickle acks for */
162 arp->tcparray = talloc_steal(arp, tcparray);
164 state->vnn->tcp_array = NULL;
165 state->vnn->tcp_update_needed = true;
168 event_add_timed(arp->ctdb->ev, state->vnn->takeover_ctx,
169 timeval_zero(), ctdb_control_send_arp, arp);
171 /* the control succeeded */
172 ctdb_request_control_reply(ctdb, state->c, NULL, 0, NULL);
177 ctdb_request_control_reply(ctdb, state->c, NULL, -1, NULL);
183 Find the vnn of the node that has a public ip address
184 returns -1 if the address is not known as a public address
186 static struct ctdb_vnn *find_public_ip_vnn(struct ctdb_context *ctdb, struct sockaddr_in ip)
188 struct ctdb_vnn *vnn;
190 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
191 if (ctdb_same_ip(&vnn->public_address, &ip)) {
201 take over an ip address
203 int32_t ctdb_control_takeover_ip(struct ctdb_context *ctdb,
204 struct ctdb_req_control *c,
209 struct takeover_callback_state *state;
210 struct ctdb_public_ip *pip = (struct ctdb_public_ip *)indata.dptr;
211 struct ctdb_vnn *vnn;
213 /* update out vnn list */
214 vnn = find_public_ip_vnn(ctdb, pip->sin);
216 DEBUG(0,("takeoverip called for an ip '%s' that is not a public address\n",
217 inet_ntoa(pip->sin.sin_addr)));
222 /* if our kernel already has this IP, do nothing */
223 if (ctdb_sys_have_ip(pip->sin)) {
227 state = talloc(ctdb, struct takeover_callback_state);
228 CTDB_NO_MEMORY(ctdb, state);
230 state->c = talloc_steal(ctdb, c);
231 state->sin = talloc(ctdb, struct sockaddr_in);
232 CTDB_NO_MEMORY(ctdb, state->sin);
233 *state->sin = pip->sin;
237 DEBUG(0,("Takeover of IP %s/%u on interface %s\n",
238 inet_ntoa(pip->sin.sin_addr), vnn->public_netmask_bits,
241 ctdb_disable_monitoring(ctdb);
243 ret = ctdb_event_script_callback(ctdb,
244 timeval_current_ofs(ctdb->tunable.script_timeout, 0),
245 state, takeover_ip_callback, state,
248 inet_ntoa(pip->sin.sin_addr),
249 vnn->public_netmask_bits);
252 ctdb_enable_monitoring(ctdb);
253 DEBUG(0,(__location__ " Failed to takeover IP %s on interface %s\n",
254 inet_ntoa(pip->sin.sin_addr), vnn->iface));
259 /* tell ctdb_control.c that we will be replying asynchronously */
266 kill any clients that are registered with a IP that is being released
268 static void release_kill_clients(struct ctdb_context *ctdb, struct sockaddr_in in)
270 struct ctdb_client_ip *ip;
272 DEBUG(1,("release_kill_clients for ip %s\n", inet_ntoa(in.sin_addr)));
274 for (ip=ctdb->client_ip_list; ip; ip=ip->next) {
275 DEBUG(2,("checking for client %u with IP %s\n",
276 ip->client_id, inet_ntoa(ip->ip.sin_addr)));
277 if (ctdb_same_ip(&ip->ip, &in)) {
278 struct ctdb_client *client = ctdb_reqid_find(ctdb,
281 DEBUG(1,("matched client %u with IP %s and pid %u\n",
282 ip->client_id, inet_ntoa(ip->ip.sin_addr), client->pid));
283 if (client->pid != 0) {
284 DEBUG(0,(__location__ " Killing client pid %u for IP %s on client_id %u\n",
285 (unsigned)client->pid, inet_ntoa(in.sin_addr),
287 kill(client->pid, SIGKILL);
294 called when releaseip event finishes
296 static void release_ip_callback(struct ctdb_context *ctdb, int status,
299 struct takeover_callback_state *state =
300 talloc_get_type(private_data, struct takeover_callback_state);
301 char *ip = inet_ntoa(state->sin->sin_addr);
304 ctdb_enable_monitoring(ctdb);
306 /* send a message to all clients of this node telling them
307 that the cluster has been reconfigured and they should
308 release any sockets on this IP */
309 data.dptr = (uint8_t *)ip;
310 data.dsize = strlen(ip)+1;
312 ctdb_daemon_send_message(ctdb, ctdb->pnn, CTDB_SRVID_RELEASE_IP, data);
314 /* kill clients that have registered with this IP */
315 release_kill_clients(ctdb, *state->sin);
317 /* the control succeeded */
318 ctdb_request_control_reply(ctdb, state->c, NULL, 0, NULL);
323 release an ip address
325 int32_t ctdb_control_release_ip(struct ctdb_context *ctdb,
326 struct ctdb_req_control *c,
331 struct takeover_callback_state *state;
332 struct ctdb_public_ip *pip = (struct ctdb_public_ip *)indata.dptr;
333 struct ctdb_vnn *vnn;
335 /* update our vnn list */
336 vnn = find_public_ip_vnn(ctdb, pip->sin);
338 DEBUG(0,("releaseip called for an ip '%s' that is not a public address\n",
339 inet_ntoa(pip->sin.sin_addr)));
344 /* stop any previous arps */
345 talloc_free(vnn->takeover_ctx);
346 vnn->takeover_ctx = NULL;
348 if (!ctdb_sys_have_ip(pip->sin)) {
349 DEBUG(2,("Redundant release of IP %s/%u on interface %s (ip not held)\n",
350 inet_ntoa(pip->sin.sin_addr), vnn->public_netmask_bits,
355 DEBUG(0,("Release of IP %s/%u on interface %s\n",
356 inet_ntoa(pip->sin.sin_addr), vnn->public_netmask_bits,
359 state = talloc(ctdb, struct takeover_callback_state);
360 CTDB_NO_MEMORY(ctdb, state);
362 state->c = talloc_steal(state, c);
363 state->sin = talloc(state, struct sockaddr_in);
364 CTDB_NO_MEMORY(ctdb, state->sin);
365 *state->sin = pip->sin;
369 ctdb_disable_monitoring(ctdb);
371 ret = ctdb_event_script_callback(ctdb,
372 timeval_current_ofs(ctdb->tunable.script_timeout, 0),
373 state, release_ip_callback, state,
374 "releaseip %s %s %u",
376 inet_ntoa(pip->sin.sin_addr),
377 vnn->public_netmask_bits);
379 ctdb_enable_monitoring(ctdb);
381 DEBUG(0,(__location__ " Failed to release IP %s on interface %s\n",
382 inet_ntoa(pip->sin.sin_addr), vnn->iface));
387 /* tell the control that we will be reply asynchronously */
394 static int add_public_address(struct ctdb_context *ctdb, struct sockaddr_in addr, unsigned mask, const char *iface)
396 struct ctdb_vnn *vnn;
398 /* Verify that we dont have an entry for this ip yet */
399 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
400 if (ctdb_same_sockaddr(&addr, &vnn->public_address)) {
401 DEBUG(0,("Same ip '%s' specified multiple times in the public address list \n",
402 inet_ntoa(addr.sin_addr)));
407 /* create a new vnn structure for this ip address */
408 vnn = talloc_zero(ctdb, struct ctdb_vnn);
409 CTDB_NO_MEMORY_FATAL(ctdb, vnn);
410 vnn->iface = talloc_strdup(vnn, iface);
411 vnn->public_address = addr;
412 vnn->public_netmask_bits = mask;
415 DLIST_ADD(ctdb->vnn, vnn);
422 setup the event script directory
424 int ctdb_set_event_script_dir(struct ctdb_context *ctdb, const char *script_dir)
426 ctdb->event_script_dir = talloc_strdup(ctdb, script_dir);
427 CTDB_NO_MEMORY(ctdb, ctdb->event_script_dir);
432 setup the public address lists from a file
434 int ctdb_set_public_addresses(struct ctdb_context *ctdb, const char *alist)
440 lines = file_lines_load(alist, &nlines, ctdb);
442 ctdb_set_error(ctdb, "Failed to load public address list '%s'\n", alist);
445 while (nlines > 0 && strcmp(lines[nlines-1], "") == 0) {
449 for (i=0;i<nlines;i++) {
451 struct sockaddr_in addr;
455 tok = strtok(lines[i], " \t");
456 if (!tok || !parse_ip_mask(tok, &addr, &mask)) {
457 DEBUG(0,("Badly formed line %u in public address list\n", i+1));
461 tok = strtok(NULL, " \t");
463 if (NULL == ctdb->default_public_interface) {
464 DEBUG(0,("No default public interface and no interface specified at line %u of public address list\n",
469 iface = ctdb->default_public_interface;
474 if (add_public_address(ctdb, addr, mask, iface)) {
475 DEBUG(0,("Failed to add line %u to the public address list\n", i+1));
488 struct ctdb_public_ip_list {
489 struct ctdb_public_ip_list *next;
491 struct sockaddr_in sin;
495 /* Given a physical node, return the number of
496 public addresses that is currently assigned to this node.
498 static int node_ip_coverage(struct ctdb_context *ctdb,
500 struct ctdb_public_ip_list *ips)
504 for (;ips;ips=ips->next) {
505 if (ips->pnn == pnn) {
513 /* Check if this is a public ip known to the node, i.e. can that
514 node takeover this ip ?
516 static int can_node_serve_ip(struct ctdb_context *ctdb, int32_t pnn,
517 struct ctdb_public_ip_list *ip)
519 struct ctdb_all_public_ips *public_ips;
522 public_ips = ctdb->nodes[pnn]->public_ips;
524 if (public_ips == NULL) {
528 for (i=0;i<public_ips->num;i++) {
529 if (ip->sin.sin_addr.s_addr == public_ips->ips[i].sin.sin_addr.s_addr) {
530 /* yes, this node can serve this public ip */
539 /* search the node lists list for a node to takeover this ip.
540 pick the node that currently are serving the least number of ips
541 so that the ips get spread out evenly.
543 static int find_takeover_node(struct ctdb_context *ctdb,
544 struct ctdb_node_map *nodemap, uint32_t mask,
545 struct ctdb_public_ip_list *ip,
546 struct ctdb_public_ip_list *all_ips)
552 for (i=0;i<nodemap->num;i++) {
553 if (nodemap->nodes[i].flags & mask) {
554 /* This node is not healty and can not be used to serve
560 /* verify that this node can serve this ip */
561 if (can_node_serve_ip(ctdb, i, ip)) {
562 /* no it couldnt so skip to the next node */
566 num = node_ip_coverage(ctdb, i, all_ips);
567 /* was this the first node we checked ? */
579 DEBUG(0,(__location__ " Could not find node to take over public address '%s'\n", inet_ntoa(ip->sin.sin_addr)));
587 struct ctdb_public_ip_list *
588 add_ip_to_merged_list(struct ctdb_context *ctdb,
590 struct ctdb_public_ip_list *ip_list,
591 struct ctdb_public_ip *ip)
593 struct ctdb_public_ip_list *tmp_ip;
595 /* do we already have this ip in our merged list ?*/
596 for (tmp_ip=ip_list;tmp_ip;tmp_ip=tmp_ip->next) {
598 /* we already have this public ip in the list */
599 if (tmp_ip->sin.sin_addr.s_addr == ip->sin.sin_addr.s_addr) {
604 /* this is a new public ip, we must add it to the list */
605 tmp_ip = talloc_zero(tmp_ctx, struct ctdb_public_ip_list);
606 CTDB_NO_MEMORY_NULL(ctdb, tmp_ip);
607 tmp_ip->pnn = ip->pnn;
608 tmp_ip->sin = ip->sin;
609 tmp_ip->next = ip_list;
614 struct ctdb_public_ip_list *
615 create_merged_ip_list(struct ctdb_context *ctdb, TALLOC_CTX *tmp_ctx)
618 struct ctdb_public_ip_list *ip_list = NULL;
619 struct ctdb_all_public_ips *public_ips;
621 for (i=0;i<ctdb->num_nodes;i++) {
622 public_ips = ctdb->nodes[i]->public_ips;
624 /* there were no public ips for this node */
625 if (public_ips == NULL) {
629 for (j=0;j<public_ips->num;j++) {
630 ip_list = add_ip_to_merged_list(ctdb, tmp_ctx,
631 ip_list, &public_ips->ips[j]);
639 make any IP alias changes for public addresses that are necessary
641 int ctdb_takeover_run(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap)
643 int i, num_healthy, retries;
645 struct ctdb_public_ip ip;
647 struct ctdb_public_ip_list *all_ips, *tmp_ip;
648 int maxnode, maxnum=0, minnode, minnum=0, num;
649 TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
654 /* Count how many completely healthy nodes we have */
656 for (i=0;i<nodemap->num;i++) {
657 if (!(nodemap->nodes[i].flags & (NODE_FLAGS_INACTIVE|NODE_FLAGS_DISABLED))) {
662 if (num_healthy > 0) {
663 /* We have healthy nodes, so only consider them for
664 serving public addresses
666 mask = NODE_FLAGS_INACTIVE|NODE_FLAGS_DISABLED;
668 /* We didnt have any completely healthy nodes so
669 use "disabled" nodes as a fallback
671 mask = NODE_FLAGS_INACTIVE;
674 /* since nodes only know about those public addresses that
675 can be served by that particular node, no single node has
676 a full list of all public addresses that exist in the cluster.
677 Walk over all node structures and create a merged list of
678 all public addresses that exist in the cluster.
680 all_ips = create_merged_ip_list(ctdb, tmp_ctx);
682 /* If we want deterministic ip allocations, i.e. that the ip addresses
683 will always be allocated the same way for a specific set of
684 available/unavailable nodes.
686 if (1 == ctdb->tunable.deterministic_public_ips) {
687 DEBUG(0,("Deterministic IPs enabled. Resetting all ip allocations\n"));
688 for (i=0,tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next,i++) {
689 tmp_ip->pnn = i%nodemap->num;
694 /* mark all public addresses with a masked node as being served by
697 for (tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next) {
698 if (tmp_ip->pnn == -1) {
701 if (nodemap->nodes[tmp_ip->pnn].flags & mask) {
707 /* now we must redistribute all public addresses with takeover node
708 -1 among the nodes available
712 /* loop over all ip's and find a physical node to cover for
715 for (tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next) {
716 if (tmp_ip->pnn == -1) {
717 if (find_takeover_node(ctdb, nodemap, mask, tmp_ip, all_ips)) {
718 DEBUG(0,("Failed to find node to cover ip %s\n", inet_ntoa(tmp_ip->sin.sin_addr)));
724 /* now, try to make sure the ip adresses are evenly distributed
726 for each ip address, loop over all nodes that can serve this
727 ip and make sure that the difference between the node
728 serving the most and the node serving the least ip's are not greater
731 for (tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next) {
732 if (tmp_ip->pnn == -1) {
736 /* Get the highest and lowest number of ips's served by any
737 valid node which can serve this ip.
741 for (i=0;i<nodemap->num;i++) {
742 if (nodemap->nodes[i].flags & mask) {
746 /* only check nodes that can actually serve this ip */
747 if (can_node_serve_ip(ctdb, i, tmp_ip)) {
748 /* no it couldnt so skip to the next node */
752 num = node_ip_coverage(ctdb, i, all_ips);
773 DEBUG(0,(__location__ " Could not find maxnode. May not be able to serve ip '%s'\n", inet_ntoa(tmp_ip->sin.sin_addr)));
777 /* If we want deterministic IPs then dont try to reallocate
778 them to spread out the load.
780 if (1 == ctdb->tunable.deterministic_public_ips) {
784 /* if the spread between the smallest and largest coverage by
785 a node is >=2 we steal one of the ips from the node with
786 most coverage to even things out a bit.
787 try to do this at most 5 times since we dont want to spend
788 too much time balancing the ip coverage.
790 if ( (maxnum > minnum+1)
792 struct ctdb_public_ip_list *tmp;
794 /* mark one of maxnode's vnn's as unassigned and try
797 for (tmp=all_ips;tmp;tmp=tmp->next) {
798 if (tmp->pnn == maxnode) {
809 /* at this point ->pnn is the node which will own each IP
810 or -1 if there is no node that can cover this ip
813 /* now tell all nodes to delete any alias that they should not
814 have. This will be a NOOP on nodes that don't currently
815 hold the given alias */
816 for (i=0;i<nodemap->num;i++) {
817 /* don't talk to unconnected nodes, but do talk to banned nodes */
818 if (nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
822 for (tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next) {
823 if (tmp_ip->pnn == nodemap->nodes[i].pnn) {
824 /* This node should be serving this
825 vnn so dont tell it to release the ip
829 ip.pnn = tmp_ip->pnn;
830 ip.sin.sin_family = AF_INET;
831 ip.sin.sin_addr = tmp_ip->sin.sin_addr;
833 ret = ctdb_ctrl_release_ip(ctdb, TAKEOVER_TIMEOUT(),
834 nodemap->nodes[i].pnn,
837 DEBUG(0,("Failed to tell vnn %u to release IP %s\n",
838 nodemap->nodes[i].pnn,
839 inet_ntoa(tmp_ip->sin.sin_addr)));
840 talloc_free(tmp_ctx);
847 /* tell all nodes to get their own IPs */
848 for (tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next) {
849 if (tmp_ip->pnn == -1) {
850 /* this IP won't be taken over */
853 ip.pnn = tmp_ip->pnn;
854 ip.sin.sin_family = AF_INET;
855 ip.sin.sin_addr = tmp_ip->sin.sin_addr;
857 ret = ctdb_ctrl_takeover_ip(ctdb, TAKEOVER_TIMEOUT(),
861 DEBUG(0,("Failed asking vnn %u to take over IP %s\n",
863 inet_ntoa(tmp_ip->sin.sin_addr)));
864 talloc_free(tmp_ctx);
869 talloc_free(tmp_ctx);
875 destroy a ctdb_client_ip structure
877 static int ctdb_client_ip_destructor(struct ctdb_client_ip *ip)
879 DEBUG(3,("destroying client tcp for %s:%u (client_id %u)\n",
880 inet_ntoa(ip->ip.sin_addr), ntohs(ip->ip.sin_port), ip->client_id));
881 DLIST_REMOVE(ip->ctdb->client_ip_list, ip);
886 called by a client to inform us of a TCP connection that it is managing
887 that should tickled with an ACK when IP takeover is done
889 int32_t ctdb_control_tcp_client(struct ctdb_context *ctdb, uint32_t client_id,
892 struct ctdb_client *client = ctdb_reqid_find(ctdb, client_id, struct ctdb_client);
893 struct ctdb_control_tcp *p = (struct ctdb_control_tcp *)indata.dptr;
894 struct ctdb_tcp_list *tcp;
895 struct ctdb_control_tcp_vnn t;
898 struct ctdb_client_ip *ip;
899 struct ctdb_vnn *vnn;
901 vnn = find_public_ip_vnn(ctdb, p->dest);
903 if (ntohl(p->dest.sin_addr.s_addr) != INADDR_LOOPBACK) {
904 DEBUG(0,("Could not add client IP %s. This is not a public address.\n",
905 inet_ntoa(p->dest.sin_addr)));
910 if (vnn->pnn != ctdb->pnn) {
911 DEBUG(0,("Attempt to register tcp client for IP %s we don't hold - failing (client_id %u pid %u)\n",
912 inet_ntoa(p->dest.sin_addr),
913 client_id, client->pid));
914 /* failing this call will tell smbd to die */
918 ip = talloc(client, struct ctdb_client_ip);
919 CTDB_NO_MEMORY(ctdb, ip);
923 ip->client_id = client_id;
924 talloc_set_destructor(ip, ctdb_client_ip_destructor);
925 DLIST_ADD(ctdb->client_ip_list, ip);
927 tcp = talloc(client, struct ctdb_tcp_list);
928 CTDB_NO_MEMORY(ctdb, tcp);
930 tcp->connection.saddr = p->src;
931 tcp->connection.daddr = p->dest;
933 DLIST_ADD(client->tcp_list, tcp);
938 data.dptr = (uint8_t *)&t;
939 data.dsize = sizeof(t);
941 DEBUG(1,("registered tcp client for %u->%s:%u (client_id %u pid %u)\n",
942 (unsigned)ntohs(p->dest.sin_port),
943 inet_ntoa(p->src.sin_addr),
944 (unsigned)ntohs(p->src.sin_port), client_id, client->pid));
946 /* tell all nodes about this tcp connection */
947 ret = ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_CONNECTED, 0,
948 CTDB_CONTROL_TCP_ADD,
949 0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
951 DEBUG(0,(__location__ " Failed to send CTDB_CONTROL_TCP_ADD\n"));
959 see if two sockaddr_in are the same
961 static bool same_sockaddr_in(struct sockaddr_in *in1, struct sockaddr_in *in2)
963 return in1->sin_family == in2->sin_family &&
964 in1->sin_port == in2->sin_port &&
965 in1->sin_addr.s_addr == in2->sin_addr.s_addr;
969 find a tcp address on a list
971 static struct ctdb_tcp_connection *ctdb_tcp_find(struct ctdb_tcp_array *array,
972 struct ctdb_tcp_connection *tcp)
980 for (i=0;i<array->num;i++) {
981 if (same_sockaddr_in(&array->connections[i].saddr, &tcp->saddr) &&
982 same_sockaddr_in(&array->connections[i].daddr, &tcp->daddr)) {
983 return &array->connections[i];
990 called by a daemon to inform us of a TCP connection that one of its
991 clients managing that should tickled with an ACK when IP takeover is
994 int32_t ctdb_control_tcp_add(struct ctdb_context *ctdb, TDB_DATA indata)
996 struct ctdb_control_tcp_vnn *p = (struct ctdb_control_tcp_vnn *)indata.dptr;
997 struct ctdb_tcp_array *tcparray;
998 struct ctdb_tcp_connection tcp;
999 struct ctdb_vnn *vnn;
1001 vnn = find_public_ip_vnn(ctdb, p->dest);
1003 DEBUG(0,(__location__ " got TCP_ADD control for an address which is not a public address '%s'\n",
1004 inet_ntoa(p->dest.sin_addr)));
1009 tcparray = vnn->tcp_array;
1011 /* If this is the first tickle */
1012 if (tcparray == NULL) {
1013 tcparray = talloc_size(ctdb->nodes,
1014 offsetof(struct ctdb_tcp_array, connections) +
1015 sizeof(struct ctdb_tcp_connection) * 1);
1016 CTDB_NO_MEMORY(ctdb, tcparray);
1017 vnn->tcp_array = tcparray;
1020 tcparray->connections = talloc_size(tcparray, sizeof(struct ctdb_tcp_connection));
1021 CTDB_NO_MEMORY(ctdb, tcparray->connections);
1023 tcparray->connections[tcparray->num].saddr = p->src;
1024 tcparray->connections[tcparray->num].daddr = p->dest;
1030 /* Do we already have this tickle ?*/
1032 tcp.daddr = p->dest;
1033 if (ctdb_tcp_find(vnn->tcp_array, &tcp) != NULL) {
1034 DEBUG(4,("Already had tickle info for %s:%u for vnn:%u\n",
1035 inet_ntoa(tcp.daddr.sin_addr),
1036 ntohs(tcp.daddr.sin_port),
1041 /* A new tickle, we must add it to the array */
1042 tcparray->connections = talloc_realloc(tcparray, tcparray->connections,
1043 struct ctdb_tcp_connection,
1045 CTDB_NO_MEMORY(ctdb, tcparray->connections);
1047 vnn->tcp_array = tcparray;
1048 tcparray->connections[tcparray->num].saddr = p->src;
1049 tcparray->connections[tcparray->num].daddr = p->dest;
1052 DEBUG(2,("Added tickle info for %s:%u from vnn %u\n",
1053 inet_ntoa(tcp.daddr.sin_addr),
1054 ntohs(tcp.daddr.sin_port),
1062 called by a daemon to inform us of a TCP connection that one of its
1063 clients managing that should tickled with an ACK when IP takeover is
1066 static void ctdb_remove_tcp_connection(struct ctdb_context *ctdb, struct ctdb_tcp_connection *conn)
1068 struct ctdb_tcp_connection *tcpp;
1069 struct ctdb_vnn *vnn = find_public_ip_vnn(ctdb, conn->daddr);
1072 DEBUG(0,(__location__ " unable to find public address %s\n", inet_ntoa(conn->daddr.sin_addr)));
1076 /* if the array is empty we cant remove it
1077 and we dont need to do anything
1079 if (vnn->tcp_array == NULL) {
1080 DEBUG(2,("Trying to remove tickle that doesnt exist (array is empty) %s:%u\n",
1081 inet_ntoa(conn->daddr.sin_addr),
1082 ntohs(conn->daddr.sin_port)));
1087 /* See if we know this connection
1088 if we dont know this connection then we dont need to do anything
1090 tcpp = ctdb_tcp_find(vnn->tcp_array, conn);
1092 DEBUG(2,("Trying to remove tickle that doesnt exist %s:%u\n",
1093 inet_ntoa(conn->daddr.sin_addr),
1094 ntohs(conn->daddr.sin_port)));
1099 /* We need to remove this entry from the array.
1100 Instead of allocating a new array and copying data to it
1101 we cheat and just copy the last entry in the existing array
1102 to the entry that is to be removed and just shring the
1105 *tcpp = vnn->tcp_array->connections[vnn->tcp_array->num - 1];
1106 vnn->tcp_array->num--;
1108 /* If we deleted the last entry we also need to remove the entire array
1110 if (vnn->tcp_array->num == 0) {
1111 talloc_free(vnn->tcp_array);
1112 vnn->tcp_array = NULL;
1115 vnn->tcp_update_needed = true;
1117 DEBUG(2,("Removed tickle info for %s:%u\n",
1118 inet_ntoa(conn->saddr.sin_addr),
1119 ntohs(conn->saddr.sin_port)));
1124 called when a daemon restarts - send all tickes for all public addresses
1125 we are serving immediately to the new node.
1127 int32_t ctdb_control_startup(struct ctdb_context *ctdb, uint32_t vnn)
1129 /*XXX here we should send all tickes we are serving to the new node */
1135 called when a client structure goes away - hook to remove
1136 elements from the tcp_list in all daemons
1138 void ctdb_takeover_client_destructor_hook(struct ctdb_client *client)
1140 while (client->tcp_list) {
1141 struct ctdb_tcp_list *tcp = client->tcp_list;
1142 DLIST_REMOVE(client->tcp_list, tcp);
1143 ctdb_remove_tcp_connection(client->ctdb, &tcp->connection);
1149 release all IPs on shutdown
1151 void ctdb_release_all_ips(struct ctdb_context *ctdb)
1153 struct ctdb_vnn *vnn;
1155 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
1156 if (!ctdb_sys_have_ip(vnn->public_address)) {
1159 ctdb_event_script(ctdb, "releaseip %s %s %u",
1161 inet_ntoa(vnn->public_address.sin_addr),
1162 vnn->public_netmask_bits);
1163 release_kill_clients(ctdb, vnn->public_address);
1169 get list of public IPs
1171 int32_t ctdb_control_get_public_ips(struct ctdb_context *ctdb,
1172 struct ctdb_req_control *c, TDB_DATA *outdata)
1175 struct ctdb_all_public_ips *ips;
1176 struct ctdb_vnn *vnn;
1178 /* count how many public ip structures we have */
1180 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
1184 len = offsetof(struct ctdb_all_public_ips, ips) +
1185 num*sizeof(struct ctdb_public_ip);
1186 ips = talloc_zero_size(outdata, len);
1187 CTDB_NO_MEMORY(ctdb, ips);
1189 outdata->dsize = len;
1190 outdata->dptr = (uint8_t *)ips;
1194 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
1195 ips->ips[i].pnn = vnn->pnn;
1196 ips->ips[i].sin = vnn->public_address;
1206 structure containing the listening socket and the list of tcp connections
1207 that the ctdb daemon is to kill
1209 struct ctdb_kill_tcp {
1210 struct ctdb_vnn *vnn;
1211 struct ctdb_context *ctdb;
1214 struct fd_event *fde;
1215 trbt_tree_t *connections;
1220 a tcp connection that is to be killed
1222 struct ctdb_killtcp_con {
1223 struct sockaddr_in src;
1224 struct sockaddr_in dst;
1226 struct ctdb_kill_tcp *killtcp;
1229 /* this function is used to create a key to represent this socketpair
1230 in the killtcp tree.
1231 this key is used to insert and lookup matching socketpairs that are
1232 to be tickled and RST
1234 #define KILLTCP_KEYLEN 4
1235 static uint32_t *killtcp_key(struct sockaddr_in *src, struct sockaddr_in *dst)
1237 static uint32_t key[KILLTCP_KEYLEN];
1239 key[0] = dst->sin_addr.s_addr;
1240 key[1] = src->sin_addr.s_addr;
1241 key[2] = dst->sin_port;
1242 key[3] = src->sin_port;
1248 called when we get a read event on the raw socket
1250 static void capture_tcp_handler(struct event_context *ev, struct fd_event *fde,
1251 uint16_t flags, void *private_data)
1253 struct ctdb_kill_tcp *killtcp = talloc_get_type(private_data, struct ctdb_kill_tcp);
1254 struct ctdb_killtcp_con *con;
1255 struct sockaddr_in src, dst;
1256 uint32_t ack_seq, seq;
1258 if (!(flags & EVENT_FD_READ)) {
1262 if (ctdb_sys_read_tcp_packet(killtcp->capture_fd,
1263 killtcp->private_data,
1265 &ack_seq, &seq) != 0) {
1266 /* probably a non-tcp ACK packet */
1270 /* check if we have this guy in our list of connections
1273 con = trbt_lookuparray32(killtcp->connections,
1274 KILLTCP_KEYLEN, killtcp_key(&src, &dst));
1276 /* no this was some other packet we can just ignore */
1280 /* This one has been tickled !
1281 now reset him and remove him from the list.
1283 DEBUG(1, ("sending a tcp reset to kill connection :%d -> %s:%d\n", ntohs(con->dst.sin_port), inet_ntoa(con->src.sin_addr), ntohs(con->src.sin_port)));
1285 ctdb_sys_send_tcp(killtcp->sending_fd, &con->dst,
1286 &con->src, ack_seq, seq, 1);
1291 /* when traversing the list of all tcp connections to send tickle acks to
1292 (so that we can capture the ack coming back and kill the connection
1294 this callback is called for each connection we are currently trying to kill
1296 static void tickle_connection_traverse(void *param, void *data)
1298 struct ctdb_killtcp_con *con = talloc_get_type(data, struct ctdb_killtcp_con);
1299 struct ctdb_kill_tcp *killtcp = talloc_get_type(param, struct ctdb_kill_tcp);
1301 /* have tried too many times, just give up */
1302 if (con->count >= 5) {
1307 /* othervise, try tickling it again */
1309 ctdb_sys_send_tcp(killtcp->sending_fd, &con->dst, &con->src, 0, 0, 0);
1314 called every second until all sentenced connections have been reset
1316 static void ctdb_tickle_sentenced_connections(struct event_context *ev, struct timed_event *te,
1317 struct timeval t, void *private_data)
1319 struct ctdb_kill_tcp *killtcp = talloc_get_type(private_data, struct ctdb_kill_tcp);
1322 /* loop over all connections sending tickle ACKs */
1323 trbt_traversearray32(killtcp->connections, KILLTCP_KEYLEN, tickle_connection_traverse, killtcp);
1326 /* If there are no more connections to kill we can remove the
1327 entire killtcp structure
1329 if ( (killtcp->connections == NULL) ||
1330 (killtcp->connections->root == NULL) ) {
1331 talloc_free(killtcp);
1335 /* try tickling them again in a seconds time
1337 event_add_timed(killtcp->ctdb->ev, killtcp, timeval_current_ofs(1, 0),
1338 ctdb_tickle_sentenced_connections, killtcp);
1342 destroy the killtcp structure
1344 static int ctdb_killtcp_destructor(struct ctdb_kill_tcp *killtcp)
1346 if (killtcp->sending_fd != -1) {
1347 close(killtcp->sending_fd);
1348 killtcp->sending_fd = -1;
1350 killtcp->vnn->killtcp = NULL;
1355 /* nothing fancy here, just unconditionally replace any existing
1356 connection structure with the new one.
1358 dont even free the old one if it did exist, that one is talloc_stolen
1359 by the same node in the tree anyway and will be deleted when the new data
1362 static void *add_killtcp_callback(void *parm, void *data)
1368 add a tcp socket to the list of connections we want to RST
1370 static int ctdb_killtcp_add_connection(struct ctdb_context *ctdb,
1371 struct sockaddr_in *src, struct sockaddr_in *dst)
1373 struct ctdb_kill_tcp *killtcp;
1374 struct ctdb_killtcp_con *con;
1375 struct ctdb_vnn *vnn;
1377 vnn = find_public_ip_vnn(ctdb, *dst);
1379 vnn = find_public_ip_vnn(ctdb, *src);
1382 /* if it is not a public ip it could be our 'single ip' */
1383 if (ctdb->single_ip_vnn) {
1384 if (ctdb_same_ip(&ctdb->single_ip_vnn->public_address, dst)) {
1385 vnn = ctdb->single_ip_vnn;
1390 DEBUG(0,(__location__ " Could not killtcp, not a public address\n"));
1394 killtcp = vnn->killtcp;
1396 /* If this is the first connection to kill we must allocate
1399 if (killtcp == NULL) {
1400 killtcp = talloc_zero(ctdb, struct ctdb_kill_tcp);
1401 CTDB_NO_MEMORY(ctdb, killtcp);
1404 killtcp->ctdb = ctdb;
1405 killtcp->capture_fd = -1;
1406 killtcp->sending_fd = -1;
1407 killtcp->connections = trbt_create(killtcp, 0);
1409 vnn->killtcp = killtcp;
1410 talloc_set_destructor(killtcp, ctdb_killtcp_destructor);
1415 /* create a structure that describes this connection we want to
1416 RST and store it in killtcp->connections
1418 con = talloc(killtcp, struct ctdb_killtcp_con);
1419 CTDB_NO_MEMORY(ctdb, con);
1423 con->killtcp = killtcp;
1426 trbt_insertarray32_callback(killtcp->connections,
1427 KILLTCP_KEYLEN, killtcp_key(&con->dst, &con->src),
1428 add_killtcp_callback, con);
1431 If we dont have a socket to send from yet we must create it
1433 if (killtcp->sending_fd == -1) {
1434 killtcp->sending_fd = ctdb_sys_open_sending_socket();
1435 if (killtcp->sending_fd == -1) {
1436 DEBUG(0,(__location__ " Failed to open sending socket for killtcp\n"));
1442 If we dont have a socket to listen on yet we must create it
1444 if (killtcp->capture_fd == -1) {
1445 killtcp->capture_fd = ctdb_sys_open_capture_socket(vnn->iface, &killtcp->private_data);
1446 if (killtcp->capture_fd == -1) {
1447 DEBUG(0,(__location__ " Failed to open capturing socket for killtcp\n"));
1453 if (killtcp->fde == NULL) {
1454 killtcp->fde = event_add_fd(ctdb->ev, killtcp, killtcp->capture_fd,
1455 EVENT_FD_READ | EVENT_FD_AUTOCLOSE,
1456 capture_tcp_handler, killtcp);
1458 /* We also need to set up some events to tickle all these connections
1459 until they are all reset
1461 event_add_timed(ctdb->ev, killtcp, timeval_current_ofs(1, 0),
1462 ctdb_tickle_sentenced_connections, killtcp);
1465 /* tickle him once now */
1466 ctdb_sys_send_tcp(killtcp->sending_fd, &con->dst, &con->src, 0, 0, 0);
1471 talloc_free(vnn->killtcp);
1472 vnn->killtcp = NULL;
1477 kill a TCP connection.
1479 int32_t ctdb_control_kill_tcp(struct ctdb_context *ctdb, TDB_DATA indata)
1481 struct ctdb_control_killtcp *killtcp = (struct ctdb_control_killtcp *)indata.dptr;
1483 return ctdb_killtcp_add_connection(ctdb, &killtcp->src, &killtcp->dst);
1487 called by a daemon to inform us of the entire list of TCP tickles for
1488 a particular public address.
1489 this control should only be sent by the node that is currently serving
1490 that public address.
1492 int32_t ctdb_control_set_tcp_tickle_list(struct ctdb_context *ctdb, TDB_DATA indata)
1494 struct ctdb_control_tcp_tickle_list *list = (struct ctdb_control_tcp_tickle_list *)indata.dptr;
1495 struct ctdb_tcp_array *tcparray;
1496 struct ctdb_vnn *vnn;
1498 /* We must at least have tickles.num or else we cant verify the size
1499 of the received data blob
1501 if (indata.dsize < offsetof(struct ctdb_control_tcp_tickle_list,
1502 tickles.connections)) {
1503 DEBUG(0,("Bad indata in ctdb_control_set_tcp_tickle_list. Not enough data for the tickle.num field\n"));
1507 /* verify that the size of data matches what we expect */
1508 if (indata.dsize < offsetof(struct ctdb_control_tcp_tickle_list,
1509 tickles.connections)
1510 + sizeof(struct ctdb_tcp_connection)
1511 * list->tickles.num) {
1512 DEBUG(0,("Bad indata in ctdb_control_set_tcp_tickle_list\n"));
1516 vnn = find_public_ip_vnn(ctdb, list->ip);
1518 DEBUG(0,(__location__ " Could not set tcp tickle list, '%s' is not a public address\n",
1519 inet_ntoa(list->ip.sin_addr)));
1523 /* remove any old ticklelist we might have */
1524 talloc_free(vnn->tcp_array);
1525 vnn->tcp_array = NULL;
1527 tcparray = talloc(ctdb->nodes, struct ctdb_tcp_array);
1528 CTDB_NO_MEMORY(ctdb, tcparray);
1530 tcparray->num = list->tickles.num;
1532 tcparray->connections = talloc_array(tcparray, struct ctdb_tcp_connection, tcparray->num);
1533 CTDB_NO_MEMORY(ctdb, tcparray->connections);
1535 memcpy(tcparray->connections, &list->tickles.connections[0],
1536 sizeof(struct ctdb_tcp_connection)*tcparray->num);
1538 /* We now have a new fresh tickle list array for this vnn */
1539 vnn->tcp_array = talloc_steal(vnn, tcparray);
1545 called to return the full list of tickles for the puclic address associated
1546 with the provided vnn
1548 int32_t ctdb_control_get_tcp_tickle_list(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
1550 struct sockaddr_in *ip = (struct sockaddr_in *)indata.dptr;
1551 struct ctdb_control_tcp_tickle_list *list;
1552 struct ctdb_tcp_array *tcparray;
1554 struct ctdb_vnn *vnn;
1556 vnn = find_public_ip_vnn(ctdb, *ip);
1558 DEBUG(0,(__location__ " Could not get tcp tickle list, '%s' is not a public address\n",
1559 inet_ntoa(ip->sin_addr)));
1563 tcparray = vnn->tcp_array;
1565 num = tcparray->num;
1570 outdata->dsize = offsetof(struct ctdb_control_tcp_tickle_list,
1571 tickles.connections)
1572 + sizeof(struct ctdb_tcp_connection) * num;
1574 outdata->dptr = talloc_size(outdata, outdata->dsize);
1575 CTDB_NO_MEMORY(ctdb, outdata->dptr);
1576 list = (struct ctdb_control_tcp_tickle_list *)outdata->dptr;
1579 list->tickles.num = num;
1581 memcpy(&list->tickles.connections[0], tcparray->connections,
1582 sizeof(struct ctdb_tcp_connection) * num);
1590 set the list of all tcp tickles for a public address
1592 static int ctdb_ctrl_set_tcp_tickles(struct ctdb_context *ctdb,
1593 struct timeval timeout, uint32_t destnode,
1594 struct sockaddr_in *ip,
1595 struct ctdb_tcp_array *tcparray)
1599 struct ctdb_control_tcp_tickle_list *list;
1602 num = tcparray->num;
1607 data.dsize = offsetof(struct ctdb_control_tcp_tickle_list,
1608 tickles.connections) +
1609 sizeof(struct ctdb_tcp_connection) * num;
1610 data.dptr = talloc_size(ctdb, data.dsize);
1611 CTDB_NO_MEMORY(ctdb, data.dptr);
1613 list = (struct ctdb_control_tcp_tickle_list *)data.dptr;
1615 list->tickles.num = num;
1617 memcpy(&list->tickles.connections[0], tcparray->connections, sizeof(struct ctdb_tcp_connection) * num);
1620 ret = ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_CONNECTED, 0,
1621 CTDB_CONTROL_SET_TCP_TICKLE_LIST,
1622 0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
1624 DEBUG(0,(__location__ " ctdb_control for set tcp tickles failed\n"));
1628 talloc_free(data.dptr);
1635 perform tickle updates if required
1637 static void ctdb_update_tcp_tickles(struct event_context *ev,
1638 struct timed_event *te,
1639 struct timeval t, void *private_data)
1641 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
1643 struct ctdb_vnn *vnn;
1645 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
1646 /* we only send out updates for public addresses that
1649 if (ctdb->pnn != vnn->pnn) {
1652 /* We only send out the updates if we need to */
1653 if (!vnn->tcp_update_needed) {
1656 ret = ctdb_ctrl_set_tcp_tickles(ctdb,
1658 CTDB_BROADCAST_CONNECTED,
1659 &vnn->public_address,
1662 DEBUG(0,("Failed to send the tickle update for public address %s\n",
1663 inet_ntoa(vnn->public_address.sin_addr)));
1667 event_add_timed(ctdb->ev, ctdb->tickle_update_context,
1668 timeval_current_ofs(ctdb->tunable.tickle_update_interval, 0),
1669 ctdb_update_tcp_tickles, ctdb);
1674 start periodic update of tcp tickles
1676 void ctdb_start_tcp_tickle_update(struct ctdb_context *ctdb)
1678 ctdb->tickle_update_context = talloc_new(ctdb);
1680 event_add_timed(ctdb->ev, ctdb->tickle_update_context,
1681 timeval_current_ofs(ctdb->tunable.tickle_update_interval, 0),
1682 ctdb_update_tcp_tickles, ctdb);
1688 struct control_gratious_arp {
1689 struct ctdb_context *ctdb;
1690 struct sockaddr_in sin;
1696 send a control_gratuitous arp
1698 static void send_gratious_arp(struct event_context *ev, struct timed_event *te,
1699 struct timeval t, void *private_data)
1702 struct control_gratious_arp *arp = talloc_get_type(private_data,
1703 struct control_gratious_arp);
1705 ret = ctdb_sys_send_arp(&arp->sin, arp->iface);
1707 DEBUG(0,(__location__ " sending of gratious arp failed (%s)\n", strerror(errno)));
1712 if (arp->count == CTDB_ARP_REPEAT) {
1717 event_add_timed(arp->ctdb->ev, arp,
1718 timeval_current_ofs(CTDB_ARP_INTERVAL, 0),
1719 send_gratious_arp, arp);
1726 int32_t ctdb_control_send_gratious_arp(struct ctdb_context *ctdb, TDB_DATA indata)
1728 struct ctdb_control_gratious_arp *gratious_arp = (struct ctdb_control_gratious_arp *)indata.dptr;
1729 struct control_gratious_arp *arp;
1732 /* verify the size of indata */
1733 if (indata.dsize < offsetof(struct ctdb_control_gratious_arp, iface)) {
1734 DEBUG(0,(__location__ " Too small indata to hold a ctdb_control_gratious_arp structure\n"));
1738 ( offsetof(struct ctdb_control_gratious_arp, iface)
1739 + gratious_arp->len ) ){
1741 DEBUG(0,(__location__ " Wrong size of indata. Was %d bytes "
1742 "but should be %d bytes\n",
1744 offsetof(struct ctdb_control_gratious_arp, iface)+gratious_arp->len));
1749 arp = talloc(ctdb, struct control_gratious_arp);
1750 CTDB_NO_MEMORY(ctdb, arp);
1753 arp->sin = gratious_arp->sin;
1754 arp->iface = talloc_strdup(arp, gratious_arp->iface);
1755 CTDB_NO_MEMORY(ctdb, arp->iface);
1758 event_add_timed(arp->ctdb->ev, arp,
1759 timeval_zero(), send_gratious_arp, arp);