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_start_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_stop_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);
251 DEBUG(0,(__location__ " Failed to takeover IP %s on interface %s\n",
252 inet_ntoa(pip->sin.sin_addr), vnn->iface));
257 /* tell ctdb_control.c that we will be replying asynchronously */
264 kill any clients that are registered with a IP that is being released
266 static void release_kill_clients(struct ctdb_context *ctdb, struct sockaddr_in in)
268 struct ctdb_client_ip *ip;
270 DEBUG(1,("release_kill_clients for ip %s\n", inet_ntoa(in.sin_addr)));
272 for (ip=ctdb->client_ip_list; ip; ip=ip->next) {
273 DEBUG(2,("checking for client %u with IP %s\n",
274 ip->client_id, inet_ntoa(ip->ip.sin_addr)));
275 if (ctdb_same_ip(&ip->ip, &in)) {
276 struct ctdb_client *client = ctdb_reqid_find(ctdb,
279 DEBUG(1,("matched client %u with IP %s and pid %u\n",
280 ip->client_id, inet_ntoa(ip->ip.sin_addr), client->pid));
281 if (client->pid != 0) {
282 DEBUG(0,(__location__ " Killing client pid %u for IP %s on client_id %u\n",
283 (unsigned)client->pid, inet_ntoa(in.sin_addr),
285 kill(client->pid, SIGKILL);
292 called when releaseip event finishes
294 static void release_ip_callback(struct ctdb_context *ctdb, int status,
297 struct takeover_callback_state *state =
298 talloc_get_type(private_data, struct takeover_callback_state);
299 char *ip = inet_ntoa(state->sin->sin_addr);
302 ctdb_start_monitoring(ctdb);
304 /* send a message to all clients of this node telling them
305 that the cluster has been reconfigured and they should
306 release any sockets on this IP */
307 data.dptr = (uint8_t *)ip;
308 data.dsize = strlen(ip)+1;
310 ctdb_daemon_send_message(ctdb, ctdb->pnn, CTDB_SRVID_RELEASE_IP, data);
312 /* kill clients that have registered with this IP */
313 release_kill_clients(ctdb, *state->sin);
315 /* the control succeeded */
316 ctdb_request_control_reply(ctdb, state->c, NULL, 0, NULL);
321 release an ip address
323 int32_t ctdb_control_release_ip(struct ctdb_context *ctdb,
324 struct ctdb_req_control *c,
329 struct takeover_callback_state *state;
330 struct ctdb_public_ip *pip = (struct ctdb_public_ip *)indata.dptr;
331 struct ctdb_vnn *vnn;
333 /* update our vnn list */
334 vnn = find_public_ip_vnn(ctdb, pip->sin);
336 DEBUG(0,("releaseip called for an ip '%s' that is not a public address\n",
337 inet_ntoa(pip->sin.sin_addr)));
342 /* stop any previous arps */
343 talloc_free(vnn->takeover_ctx);
344 vnn->takeover_ctx = NULL;
346 if (!ctdb_sys_have_ip(pip->sin)) {
347 DEBUG(2,("Redundant release of IP %s/%u on interface %s (ip not held)\n",
348 inet_ntoa(pip->sin.sin_addr), vnn->public_netmask_bits,
353 DEBUG(0,("Release of IP %s/%u on interface %s\n",
354 inet_ntoa(pip->sin.sin_addr), vnn->public_netmask_bits,
357 state = talloc(ctdb, struct takeover_callback_state);
358 CTDB_NO_MEMORY(ctdb, state);
360 state->c = talloc_steal(state, c);
361 state->sin = talloc(state, struct sockaddr_in);
362 CTDB_NO_MEMORY(ctdb, state->sin);
363 *state->sin = pip->sin;
367 ctdb_stop_monitoring(ctdb);
369 ret = ctdb_event_script_callback(ctdb,
370 timeval_current_ofs(ctdb->tunable.script_timeout, 0),
371 state, release_ip_callback, state,
372 "releaseip %s %s %u",
374 inet_ntoa(pip->sin.sin_addr),
375 vnn->public_netmask_bits);
377 DEBUG(0,(__location__ " Failed to release IP %s on interface %s\n",
378 inet_ntoa(pip->sin.sin_addr), vnn->iface));
383 /* tell the control that we will be reply asynchronously */
390 static int add_public_address(struct ctdb_context *ctdb, struct sockaddr_in addr, unsigned mask, const char *iface)
392 struct ctdb_vnn *vnn;
394 /* Verify that we dont have an entry for this ip yet */
395 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
396 if (ctdb_same_sockaddr(&addr, &vnn->public_address)) {
397 DEBUG(0,("Same ip '%s' specified multiple times in the public address list \n",
398 inet_ntoa(addr.sin_addr)));
403 /* create a new vnn structure for this ip address */
404 vnn = talloc_zero(ctdb, struct ctdb_vnn);
405 CTDB_NO_MEMORY_FATAL(ctdb, vnn);
406 vnn->iface = talloc_strdup(vnn, iface);
407 vnn->public_address = addr;
408 vnn->public_netmask_bits = mask;
411 DLIST_ADD(ctdb->vnn, vnn);
418 setup the event script directory
420 int ctdb_set_event_script_dir(struct ctdb_context *ctdb, const char *script_dir)
422 ctdb->event_script_dir = talloc_strdup(ctdb, script_dir);
423 CTDB_NO_MEMORY(ctdb, ctdb->event_script_dir);
428 setup the public address lists from a file
430 int ctdb_set_public_addresses(struct ctdb_context *ctdb, const char *alist)
436 lines = file_lines_load(alist, &nlines, ctdb);
438 ctdb_set_error(ctdb, "Failed to load public address list '%s'\n", alist);
441 while (nlines > 0 && strcmp(lines[nlines-1], "") == 0) {
445 for (i=0;i<nlines;i++) {
447 struct sockaddr_in addr;
451 tok = strtok(lines[i], " \t");
452 if (!tok || !parse_ip_mask(tok, &addr, &mask)) {
453 DEBUG(0,("Badly formed line %u in public address list\n", i+1));
457 tok = strtok(NULL, " \t");
459 if (NULL == ctdb->default_public_interface) {
460 DEBUG(0,("No default public interface and no interface specified at line %u of public address list\n",
465 iface = ctdb->default_public_interface;
470 if (add_public_address(ctdb, addr, mask, iface)) {
471 DEBUG(0,("Failed to add line %u to the public address list\n", i+1));
484 struct ctdb_public_ip_list {
485 struct ctdb_public_ip_list *next;
487 struct sockaddr_in sin;
491 /* Given a physical node, return the number of
492 public addresses that is currently assigned to this node.
494 static int node_ip_coverage(struct ctdb_context *ctdb,
496 struct ctdb_public_ip_list *ips)
500 for (;ips;ips=ips->next) {
501 if (ips->pnn == pnn) {
509 /* Check if this is a public ip known to the node, i.e. can that
510 node takeover this ip ?
512 static int can_node_serve_ip(struct ctdb_context *ctdb, int32_t pnn,
513 struct ctdb_public_ip_list *ip)
515 struct ctdb_all_public_ips *public_ips;
518 public_ips = ctdb->nodes[pnn]->public_ips;
520 if (public_ips == NULL) {
524 for (i=0;i<public_ips->num;i++) {
525 if (ip->sin.sin_addr.s_addr == public_ips->ips[i].sin.sin_addr.s_addr) {
526 /* yes, this node can serve this public ip */
535 /* search the node lists list for a node to takeover this ip.
536 pick the node that currently are serving the least number of ips
537 so that the ips get spread out evenly.
539 static int find_takeover_node(struct ctdb_context *ctdb,
540 struct ctdb_node_map *nodemap, uint32_t mask,
541 struct ctdb_public_ip_list *ip,
542 struct ctdb_public_ip_list *all_ips)
548 for (i=0;i<nodemap->num;i++) {
549 if (nodemap->nodes[i].flags & mask) {
550 /* This node is not healty and can not be used to serve
556 /* verify that this node can serve this ip */
557 if (can_node_serve_ip(ctdb, i, ip)) {
558 /* no it couldnt so skip to the next node */
562 num = node_ip_coverage(ctdb, i, all_ips);
563 /* was this the first node we checked ? */
575 DEBUG(0,(__location__ " Could not find node to take over public address '%s'\n", inet_ntoa(ip->sin.sin_addr)));
583 struct ctdb_public_ip_list *
584 add_ip_to_merged_list(struct ctdb_context *ctdb,
586 struct ctdb_public_ip_list *ip_list,
587 struct ctdb_public_ip *ip)
589 struct ctdb_public_ip_list *tmp_ip;
591 /* do we already have this ip in our merged list ?*/
592 for (tmp_ip=ip_list;tmp_ip;tmp_ip=tmp_ip->next) {
594 /* we already have this public ip in the list */
595 if (tmp_ip->sin.sin_addr.s_addr == ip->sin.sin_addr.s_addr) {
600 /* this is a new public ip, we must add it to the list */
601 tmp_ip = talloc_zero(tmp_ctx, struct ctdb_public_ip_list);
602 CTDB_NO_MEMORY_NULL(ctdb, tmp_ip);
603 tmp_ip->pnn = ip->pnn;
604 tmp_ip->sin = ip->sin;
605 tmp_ip->next = ip_list;
610 struct ctdb_public_ip_list *
611 create_merged_ip_list(struct ctdb_context *ctdb, TALLOC_CTX *tmp_ctx)
614 struct ctdb_public_ip_list *ip_list = NULL;
615 struct ctdb_all_public_ips *public_ips;
617 for (i=0;i<ctdb->num_nodes;i++) {
618 public_ips = ctdb->nodes[i]->public_ips;
620 /* there were no public ips for this node */
621 if (public_ips == NULL) {
625 for (j=0;j<public_ips->num;j++) {
626 ip_list = add_ip_to_merged_list(ctdb, tmp_ctx,
627 ip_list, &public_ips->ips[j]);
635 make any IP alias changes for public addresses that are necessary
637 int ctdb_takeover_run(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap)
639 int i, num_healthy, retries;
641 struct ctdb_public_ip ip;
643 struct ctdb_public_ip_list *all_ips, *tmp_ip;
644 int maxnode, maxnum=0, minnode, minnum=0, num;
645 TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
650 /* Count how many completely healthy nodes we have */
652 for (i=0;i<nodemap->num;i++) {
653 if (!(nodemap->nodes[i].flags & (NODE_FLAGS_INACTIVE|NODE_FLAGS_DISABLED))) {
658 if (num_healthy > 0) {
659 /* We have healthy nodes, so only consider them for
660 serving public addresses
662 mask = NODE_FLAGS_INACTIVE|NODE_FLAGS_DISABLED;
664 /* We didnt have any completely healthy nodes so
665 use "disabled" nodes as a fallback
667 mask = NODE_FLAGS_INACTIVE;
670 /* since nodes only know about those public addresses that
671 can be served by that particular node, no single node has
672 a full list of all public addresses that exist in the cluster.
673 Walk over all node structures and create a merged list of
674 all public addresses that exist in the cluster.
676 all_ips = create_merged_ip_list(ctdb, tmp_ctx);
678 /* If we want deterministic ip allocations, i.e. that the ip addresses
679 will always be allocated the same way for a specific set of
680 available/unavailable nodes.
682 if (1 == ctdb->tunable.deterministic_public_ips) {
683 DEBUG(0,("Deterministic IPs enabled. Resetting all ip allocations\n"));
684 for (i=0,tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next,i++) {
685 tmp_ip->pnn = i%nodemap->num;
690 /* mark all public addresses with a masked node as being served by
693 for (tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next) {
694 if (tmp_ip->pnn == -1) {
697 if (nodemap->nodes[tmp_ip->pnn].flags & mask) {
703 /* now we must redistribute all public addresses with takeover node
704 -1 among the nodes available
708 /* loop over all ip's and find a physical node to cover for
711 for (tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next) {
712 if (tmp_ip->pnn == -1) {
713 if (find_takeover_node(ctdb, nodemap, mask, tmp_ip, all_ips)) {
714 DEBUG(0,("Failed to find node to cover ip %s\n", inet_ntoa(tmp_ip->sin.sin_addr)));
720 /* now, try to make sure the ip adresses are evenly distributed
722 for each ip address, loop over all nodes that can serve this
723 ip and make sure that the difference between the node
724 serving the most and the node serving the least ip's are not greater
727 for (tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next) {
728 if (tmp_ip->pnn == -1) {
732 /* Get the highest and lowest number of ips's served by any
733 valid node which can serve this ip.
737 for (i=0;i<nodemap->num;i++) {
738 if (nodemap->nodes[i].flags & mask) {
742 /* only check nodes that can actually serve this ip */
743 if (can_node_serve_ip(ctdb, i, tmp_ip)) {
744 /* no it couldnt so skip to the next node */
748 num = node_ip_coverage(ctdb, i, all_ips);
769 DEBUG(0,(__location__ " Could not find maxnode. May not be able to serve ip '%s'\n", inet_ntoa(tmp_ip->sin.sin_addr)));
773 /* If we want deterministic IPs then dont try to reallocate
774 them to spread out the load.
776 if (1 == ctdb->tunable.deterministic_public_ips) {
780 /* if the spread between the smallest and largest coverage by
781 a node is >=2 we steal one of the ips from the node with
782 most coverage to even things out a bit.
783 try to do this at most 5 times since we dont want to spend
784 too much time balancing the ip coverage.
786 if ( (maxnum > minnum+1)
788 struct ctdb_public_ip_list *tmp;
790 /* mark one of maxnode's vnn's as unassigned and try
793 for (tmp=all_ips;tmp;tmp=tmp->next) {
794 if (tmp->pnn == maxnode) {
805 /* at this point ->pnn is the node which will own each IP
806 or -1 if there is no node that can cover this ip
809 /* now tell all nodes to delete any alias that they should not
810 have. This will be a NOOP on nodes that don't currently
811 hold the given alias */
812 for (i=0;i<nodemap->num;i++) {
813 /* don't talk to unconnected nodes, but do talk to banned nodes */
814 if (nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
818 for (tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next) {
819 if (tmp_ip->pnn == nodemap->nodes[i].pnn) {
820 /* This node should be serving this
821 vnn so dont tell it to release the ip
825 ip.pnn = tmp_ip->pnn;
826 ip.sin.sin_family = AF_INET;
827 ip.sin.sin_addr = tmp_ip->sin.sin_addr;
829 ret = ctdb_ctrl_release_ip(ctdb, TAKEOVER_TIMEOUT(),
830 nodemap->nodes[i].pnn,
833 DEBUG(0,("Failed to tell vnn %u to release IP %s\n",
834 nodemap->nodes[i].pnn,
835 inet_ntoa(tmp_ip->sin.sin_addr)));
836 talloc_free(tmp_ctx);
843 /* tell all nodes to get their own IPs */
844 for (tmp_ip=all_ips;tmp_ip;tmp_ip=tmp_ip->next) {
845 if (tmp_ip->pnn == -1) {
846 /* this IP won't be taken over */
849 ip.pnn = tmp_ip->pnn;
850 ip.sin.sin_family = AF_INET;
851 ip.sin.sin_addr = tmp_ip->sin.sin_addr;
853 ret = ctdb_ctrl_takeover_ip(ctdb, TAKEOVER_TIMEOUT(),
857 DEBUG(0,("Failed asking vnn %u to take over IP %s\n",
859 inet_ntoa(tmp_ip->sin.sin_addr)));
860 talloc_free(tmp_ctx);
865 talloc_free(tmp_ctx);
871 destroy a ctdb_client_ip structure
873 static int ctdb_client_ip_destructor(struct ctdb_client_ip *ip)
875 DEBUG(3,("destroying client tcp for %s:%u (client_id %u)\n",
876 inet_ntoa(ip->ip.sin_addr), ntohs(ip->ip.sin_port), ip->client_id));
877 DLIST_REMOVE(ip->ctdb->client_ip_list, ip);
882 called by a client to inform us of a TCP connection that it is managing
883 that should tickled with an ACK when IP takeover is done
885 int32_t ctdb_control_tcp_client(struct ctdb_context *ctdb, uint32_t client_id,
888 struct ctdb_client *client = ctdb_reqid_find(ctdb, client_id, struct ctdb_client);
889 struct ctdb_control_tcp *p = (struct ctdb_control_tcp *)indata.dptr;
890 struct ctdb_tcp_list *tcp;
891 struct ctdb_control_tcp_vnn t;
894 struct ctdb_client_ip *ip;
895 struct ctdb_vnn *vnn;
897 vnn = find_public_ip_vnn(ctdb, p->dest);
899 if (ntohl(p->dest.sin_addr.s_addr) != INADDR_LOOPBACK) {
900 DEBUG(0,("Could not add client IP %s. This is not a public address.\n",
901 inet_ntoa(p->dest.sin_addr)));
906 if (vnn->pnn != ctdb->pnn) {
907 DEBUG(0,("Attempt to register tcp client for IP %s we don't hold - failing (client_id %u pid %u)\n",
908 inet_ntoa(p->dest.sin_addr),
909 client_id, client->pid));
910 /* failing this call will tell smbd to die */
914 ip = talloc(client, struct ctdb_client_ip);
915 CTDB_NO_MEMORY(ctdb, ip);
919 ip->client_id = client_id;
920 talloc_set_destructor(ip, ctdb_client_ip_destructor);
921 DLIST_ADD(ctdb->client_ip_list, ip);
923 tcp = talloc(client, struct ctdb_tcp_list);
924 CTDB_NO_MEMORY(ctdb, tcp);
926 tcp->connection.saddr = p->src;
927 tcp->connection.daddr = p->dest;
929 DLIST_ADD(client->tcp_list, tcp);
934 data.dptr = (uint8_t *)&t;
935 data.dsize = sizeof(t);
937 DEBUG(1,("registered tcp client for %u->%s:%u (client_id %u pid %u)\n",
938 (unsigned)ntohs(p->dest.sin_port),
939 inet_ntoa(p->src.sin_addr),
940 (unsigned)ntohs(p->src.sin_port), client_id, client->pid));
942 /* tell all nodes about this tcp connection */
943 ret = ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_CONNECTED, 0,
944 CTDB_CONTROL_TCP_ADD,
945 0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
947 DEBUG(0,(__location__ " Failed to send CTDB_CONTROL_TCP_ADD\n"));
955 see if two sockaddr_in are the same
957 static bool same_sockaddr_in(struct sockaddr_in *in1, struct sockaddr_in *in2)
959 return in1->sin_family == in2->sin_family &&
960 in1->sin_port == in2->sin_port &&
961 in1->sin_addr.s_addr == in2->sin_addr.s_addr;
965 find a tcp address on a list
967 static struct ctdb_tcp_connection *ctdb_tcp_find(struct ctdb_tcp_array *array,
968 struct ctdb_tcp_connection *tcp)
976 for (i=0;i<array->num;i++) {
977 if (same_sockaddr_in(&array->connections[i].saddr, &tcp->saddr) &&
978 same_sockaddr_in(&array->connections[i].daddr, &tcp->daddr)) {
979 return &array->connections[i];
986 called by a daemon to inform us of a TCP connection that one of its
987 clients managing that should tickled with an ACK when IP takeover is
990 int32_t ctdb_control_tcp_add(struct ctdb_context *ctdb, TDB_DATA indata)
992 struct ctdb_control_tcp_vnn *p = (struct ctdb_control_tcp_vnn *)indata.dptr;
993 struct ctdb_tcp_array *tcparray;
994 struct ctdb_tcp_connection tcp;
995 struct ctdb_vnn *vnn;
997 vnn = find_public_ip_vnn(ctdb, p->dest);
999 DEBUG(0,(__location__ " got TCP_ADD control for an address which is not a public address '%s'\n",
1000 inet_ntoa(p->dest.sin_addr)));
1005 tcparray = vnn->tcp_array;
1007 /* If this is the first tickle */
1008 if (tcparray == NULL) {
1009 tcparray = talloc_size(ctdb->nodes,
1010 offsetof(struct ctdb_tcp_array, connections) +
1011 sizeof(struct ctdb_tcp_connection) * 1);
1012 CTDB_NO_MEMORY(ctdb, tcparray);
1013 vnn->tcp_array = tcparray;
1016 tcparray->connections = talloc_size(tcparray, sizeof(struct ctdb_tcp_connection));
1017 CTDB_NO_MEMORY(ctdb, tcparray->connections);
1019 tcparray->connections[tcparray->num].saddr = p->src;
1020 tcparray->connections[tcparray->num].daddr = p->dest;
1026 /* Do we already have this tickle ?*/
1028 tcp.daddr = p->dest;
1029 if (ctdb_tcp_find(vnn->tcp_array, &tcp) != NULL) {
1030 DEBUG(4,("Already had tickle info for %s:%u for vnn:%u\n",
1031 inet_ntoa(tcp.daddr.sin_addr),
1032 ntohs(tcp.daddr.sin_port),
1037 /* A new tickle, we must add it to the array */
1038 tcparray->connections = talloc_realloc(tcparray, tcparray->connections,
1039 struct ctdb_tcp_connection,
1041 CTDB_NO_MEMORY(ctdb, tcparray->connections);
1043 vnn->tcp_array = tcparray;
1044 tcparray->connections[tcparray->num].saddr = p->src;
1045 tcparray->connections[tcparray->num].daddr = p->dest;
1048 DEBUG(2,("Added tickle info for %s:%u from vnn %u\n",
1049 inet_ntoa(tcp.daddr.sin_addr),
1050 ntohs(tcp.daddr.sin_port),
1058 called by a daemon to inform us of a TCP connection that one of its
1059 clients managing that should tickled with an ACK when IP takeover is
1062 static void ctdb_remove_tcp_connection(struct ctdb_context *ctdb, struct ctdb_tcp_connection *conn)
1064 struct ctdb_tcp_connection *tcpp;
1065 struct ctdb_vnn *vnn = find_public_ip_vnn(ctdb, conn->daddr);
1068 DEBUG(0,(__location__ " unable to find public address %s\n", inet_ntoa(conn->daddr.sin_addr)));
1072 /* if the array is empty we cant remove it
1073 and we dont need to do anything
1075 if (vnn->tcp_array == NULL) {
1076 DEBUG(2,("Trying to remove tickle that doesnt exist (array is empty) %s:%u\n",
1077 inet_ntoa(conn->daddr.sin_addr),
1078 ntohs(conn->daddr.sin_port)));
1083 /* See if we know this connection
1084 if we dont know this connection then we dont need to do anything
1086 tcpp = ctdb_tcp_find(vnn->tcp_array, conn);
1088 DEBUG(2,("Trying to remove tickle that doesnt exist %s:%u\n",
1089 inet_ntoa(conn->daddr.sin_addr),
1090 ntohs(conn->daddr.sin_port)));
1095 /* We need to remove this entry from the array.
1096 Instead of allocating a new array and copying data to it
1097 we cheat and just copy the last entry in the existing array
1098 to the entry that is to be removed and just shring the
1101 *tcpp = vnn->tcp_array->connections[vnn->tcp_array->num - 1];
1102 vnn->tcp_array->num--;
1104 /* If we deleted the last entry we also need to remove the entire array
1106 if (vnn->tcp_array->num == 0) {
1107 talloc_free(vnn->tcp_array);
1108 vnn->tcp_array = NULL;
1111 vnn->tcp_update_needed = true;
1113 DEBUG(2,("Removed tickle info for %s:%u\n",
1114 inet_ntoa(conn->saddr.sin_addr),
1115 ntohs(conn->saddr.sin_port)));
1120 called when a daemon restarts - send all tickes for all public addresses
1121 we are serving immediately to the new node.
1123 int32_t ctdb_control_startup(struct ctdb_context *ctdb, uint32_t vnn)
1125 /*XXX here we should send all tickes we are serving to the new node */
1131 called when a client structure goes away - hook to remove
1132 elements from the tcp_list in all daemons
1134 void ctdb_takeover_client_destructor_hook(struct ctdb_client *client)
1136 while (client->tcp_list) {
1137 struct ctdb_tcp_list *tcp = client->tcp_list;
1138 DLIST_REMOVE(client->tcp_list, tcp);
1139 ctdb_remove_tcp_connection(client->ctdb, &tcp->connection);
1145 release all IPs on shutdown
1147 void ctdb_release_all_ips(struct ctdb_context *ctdb)
1149 struct ctdb_vnn *vnn;
1151 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
1152 if (!ctdb_sys_have_ip(vnn->public_address)) {
1155 ctdb_event_script(ctdb, "releaseip %s %s %u",
1157 inet_ntoa(vnn->public_address.sin_addr),
1158 vnn->public_netmask_bits);
1159 release_kill_clients(ctdb, vnn->public_address);
1165 get list of public IPs
1167 int32_t ctdb_control_get_public_ips(struct ctdb_context *ctdb,
1168 struct ctdb_req_control *c, TDB_DATA *outdata)
1171 struct ctdb_all_public_ips *ips;
1172 struct ctdb_vnn *vnn;
1174 /* count how many public ip structures we have */
1176 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
1180 len = offsetof(struct ctdb_all_public_ips, ips) +
1181 num*sizeof(struct ctdb_public_ip);
1182 ips = talloc_zero_size(outdata, len);
1183 CTDB_NO_MEMORY(ctdb, ips);
1185 outdata->dsize = len;
1186 outdata->dptr = (uint8_t *)ips;
1190 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
1191 ips->ips[i].pnn = vnn->pnn;
1192 ips->ips[i].sin = vnn->public_address;
1202 structure containing the listening socket and the list of tcp connections
1203 that the ctdb daemon is to kill
1205 struct ctdb_kill_tcp {
1206 struct ctdb_vnn *vnn;
1207 struct ctdb_context *ctdb;
1210 struct fd_event *fde;
1211 trbt_tree_t *connections;
1216 a tcp connection that is to be killed
1218 struct ctdb_killtcp_con {
1219 struct sockaddr_in src;
1220 struct sockaddr_in dst;
1222 struct ctdb_kill_tcp *killtcp;
1225 /* this function is used to create a key to represent this socketpair
1226 in the killtcp tree.
1227 this key is used to insert and lookup matching socketpairs that are
1228 to be tickled and RST
1230 #define KILLTCP_KEYLEN 4
1231 static uint32_t *killtcp_key(struct sockaddr_in *src, struct sockaddr_in *dst)
1233 static uint32_t key[KILLTCP_KEYLEN];
1235 key[0] = dst->sin_addr.s_addr;
1236 key[1] = src->sin_addr.s_addr;
1237 key[2] = dst->sin_port;
1238 key[3] = src->sin_port;
1244 called when we get a read event on the raw socket
1246 static void capture_tcp_handler(struct event_context *ev, struct fd_event *fde,
1247 uint16_t flags, void *private_data)
1249 struct ctdb_kill_tcp *killtcp = talloc_get_type(private_data, struct ctdb_kill_tcp);
1250 struct ctdb_killtcp_con *con;
1251 struct sockaddr_in src, dst;
1252 uint32_t ack_seq, seq;
1254 if (!(flags & EVENT_FD_READ)) {
1258 if (ctdb_sys_read_tcp_packet(killtcp->capture_fd,
1259 killtcp->private_data,
1261 &ack_seq, &seq) != 0) {
1262 /* probably a non-tcp ACK packet */
1266 /* check if we have this guy in our list of connections
1269 con = trbt_lookuparray32(killtcp->connections,
1270 KILLTCP_KEYLEN, killtcp_key(&src, &dst));
1272 /* no this was some other packet we can just ignore */
1276 /* This one has been tickled !
1277 now reset him and remove him from the list.
1279 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)));
1281 ctdb_sys_send_tcp(killtcp->sending_fd, &con->dst,
1282 &con->src, ack_seq, seq, 1);
1287 /* when traversing the list of all tcp connections to send tickle acks to
1288 (so that we can capture the ack coming back and kill the connection
1290 this callback is called for each connection we are currently trying to kill
1292 static void tickle_connection_traverse(void *param, void *data)
1294 struct ctdb_killtcp_con *con = talloc_get_type(data, struct ctdb_killtcp_con);
1295 struct ctdb_kill_tcp *killtcp = talloc_get_type(param, struct ctdb_kill_tcp);
1297 /* have tried too many times, just give up */
1298 if (con->count >= 5) {
1303 /* othervise, try tickling it again */
1305 ctdb_sys_send_tcp(killtcp->sending_fd, &con->dst, &con->src, 0, 0, 0);
1310 called every second until all sentenced connections have been reset
1312 static void ctdb_tickle_sentenced_connections(struct event_context *ev, struct timed_event *te,
1313 struct timeval t, void *private_data)
1315 struct ctdb_kill_tcp *killtcp = talloc_get_type(private_data, struct ctdb_kill_tcp);
1318 /* loop over all connections sending tickle ACKs */
1319 trbt_traversearray32(killtcp->connections, KILLTCP_KEYLEN, tickle_connection_traverse, killtcp);
1322 /* If there are no more connections to kill we can remove the
1323 entire killtcp structure
1325 if ( (killtcp->connections == NULL) ||
1326 (killtcp->connections->root == NULL) ) {
1327 talloc_free(killtcp);
1331 /* try tickling them again in a seconds time
1333 event_add_timed(killtcp->ctdb->ev, killtcp, timeval_current_ofs(1, 0),
1334 ctdb_tickle_sentenced_connections, killtcp);
1338 destroy the killtcp structure
1340 static int ctdb_killtcp_destructor(struct ctdb_kill_tcp *killtcp)
1342 if (killtcp->sending_fd != -1) {
1343 close(killtcp->sending_fd);
1344 killtcp->sending_fd = -1;
1346 killtcp->vnn->killtcp = NULL;
1351 /* nothing fancy here, just unconditionally replace any existing
1352 connection structure with the new one.
1354 dont even free the old one if it did exist, that one is talloc_stolen
1355 by the same node in the tree anyway and will be deleted when the new data
1358 static void *add_killtcp_callback(void *parm, void *data)
1364 add a tcp socket to the list of connections we want to RST
1366 static int ctdb_killtcp_add_connection(struct ctdb_context *ctdb,
1367 struct sockaddr_in *src, struct sockaddr_in *dst)
1369 struct ctdb_kill_tcp *killtcp;
1370 struct ctdb_killtcp_con *con;
1371 struct ctdb_vnn *vnn;
1373 vnn = find_public_ip_vnn(ctdb, *dst);
1375 vnn = find_public_ip_vnn(ctdb, *src);
1378 /* if it is not a public ip it could be our 'single ip' */
1379 if (ctdb->single_ip_vnn) {
1380 if (ctdb_same_ip(&ctdb->single_ip_vnn->public_address, dst)) {
1381 vnn = ctdb->single_ip_vnn;
1386 DEBUG(0,(__location__ " Could not killtcp, not a public address\n"));
1390 killtcp = vnn->killtcp;
1392 /* If this is the first connection to kill we must allocate
1395 if (killtcp == NULL) {
1396 killtcp = talloc_zero(ctdb, struct ctdb_kill_tcp);
1397 CTDB_NO_MEMORY(ctdb, killtcp);
1400 killtcp->ctdb = ctdb;
1401 killtcp->capture_fd = -1;
1402 killtcp->sending_fd = -1;
1403 killtcp->connections = trbt_create(killtcp, 0);
1405 vnn->killtcp = killtcp;
1406 talloc_set_destructor(killtcp, ctdb_killtcp_destructor);
1411 /* create a structure that describes this connection we want to
1412 RST and store it in killtcp->connections
1414 con = talloc(killtcp, struct ctdb_killtcp_con);
1415 CTDB_NO_MEMORY(ctdb, con);
1419 con->killtcp = killtcp;
1422 trbt_insertarray32_callback(killtcp->connections,
1423 KILLTCP_KEYLEN, killtcp_key(&con->dst, &con->src),
1424 add_killtcp_callback, con);
1427 If we dont have a socket to send from yet we must create it
1429 if (killtcp->sending_fd == -1) {
1430 killtcp->sending_fd = ctdb_sys_open_sending_socket();
1431 if (killtcp->sending_fd == -1) {
1432 DEBUG(0,(__location__ " Failed to open sending socket for killtcp\n"));
1438 If we dont have a socket to listen on yet we must create it
1440 if (killtcp->capture_fd == -1) {
1441 killtcp->capture_fd = ctdb_sys_open_capture_socket(vnn->iface, &killtcp->private_data);
1442 if (killtcp->capture_fd == -1) {
1443 DEBUG(0,(__location__ " Failed to open capturing socket for killtcp\n"));
1449 if (killtcp->fde == NULL) {
1450 killtcp->fde = event_add_fd(ctdb->ev, killtcp, killtcp->capture_fd,
1451 EVENT_FD_READ | EVENT_FD_AUTOCLOSE,
1452 capture_tcp_handler, killtcp);
1454 /* We also need to set up some events to tickle all these connections
1455 until they are all reset
1457 event_add_timed(ctdb->ev, killtcp, timeval_current_ofs(1, 0),
1458 ctdb_tickle_sentenced_connections, killtcp);
1461 /* tickle him once now */
1462 ctdb_sys_send_tcp(killtcp->sending_fd, &con->dst, &con->src, 0, 0, 0);
1467 talloc_free(vnn->killtcp);
1468 vnn->killtcp = NULL;
1473 kill a TCP connection.
1475 int32_t ctdb_control_kill_tcp(struct ctdb_context *ctdb, TDB_DATA indata)
1477 struct ctdb_control_killtcp *killtcp = (struct ctdb_control_killtcp *)indata.dptr;
1479 return ctdb_killtcp_add_connection(ctdb, &killtcp->src, &killtcp->dst);
1483 called by a daemon to inform us of the entire list of TCP tickles for
1484 a particular public address.
1485 this control should only be sent by the node that is currently serving
1486 that public address.
1488 int32_t ctdb_control_set_tcp_tickle_list(struct ctdb_context *ctdb, TDB_DATA indata)
1490 struct ctdb_control_tcp_tickle_list *list = (struct ctdb_control_tcp_tickle_list *)indata.dptr;
1491 struct ctdb_tcp_array *tcparray;
1492 struct ctdb_vnn *vnn;
1494 /* We must at least have tickles.num or else we cant verify the size
1495 of the received data blob
1497 if (indata.dsize < offsetof(struct ctdb_control_tcp_tickle_list,
1498 tickles.connections)) {
1499 DEBUG(0,("Bad indata in ctdb_control_set_tcp_tickle_list. Not enough data for the tickle.num field\n"));
1503 /* verify that the size of data matches what we expect */
1504 if (indata.dsize < offsetof(struct ctdb_control_tcp_tickle_list,
1505 tickles.connections)
1506 + sizeof(struct ctdb_tcp_connection)
1507 * list->tickles.num) {
1508 DEBUG(0,("Bad indata in ctdb_control_set_tcp_tickle_list\n"));
1512 vnn = find_public_ip_vnn(ctdb, list->ip);
1514 DEBUG(0,(__location__ " Could not set tcp tickle list, '%s' is not a public address\n",
1515 inet_ntoa(list->ip.sin_addr)));
1519 /* remove any old ticklelist we might have */
1520 talloc_free(vnn->tcp_array);
1521 vnn->tcp_array = NULL;
1523 tcparray = talloc(ctdb->nodes, struct ctdb_tcp_array);
1524 CTDB_NO_MEMORY(ctdb, tcparray);
1526 tcparray->num = list->tickles.num;
1528 tcparray->connections = talloc_array(tcparray, struct ctdb_tcp_connection, tcparray->num);
1529 CTDB_NO_MEMORY(ctdb, tcparray->connections);
1531 memcpy(tcparray->connections, &list->tickles.connections[0],
1532 sizeof(struct ctdb_tcp_connection)*tcparray->num);
1534 /* We now have a new fresh tickle list array for this vnn */
1535 vnn->tcp_array = talloc_steal(vnn, tcparray);
1541 called to return the full list of tickles for the puclic address associated
1542 with the provided vnn
1544 int32_t ctdb_control_get_tcp_tickle_list(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
1546 struct sockaddr_in *ip = (struct sockaddr_in *)indata.dptr;
1547 struct ctdb_control_tcp_tickle_list *list;
1548 struct ctdb_tcp_array *tcparray;
1550 struct ctdb_vnn *vnn;
1552 vnn = find_public_ip_vnn(ctdb, *ip);
1554 DEBUG(0,(__location__ " Could not get tcp tickle list, '%s' is not a public address\n",
1555 inet_ntoa(ip->sin_addr)));
1559 tcparray = vnn->tcp_array;
1561 num = tcparray->num;
1566 outdata->dsize = offsetof(struct ctdb_control_tcp_tickle_list,
1567 tickles.connections)
1568 + sizeof(struct ctdb_tcp_connection) * num;
1570 outdata->dptr = talloc_size(outdata, outdata->dsize);
1571 CTDB_NO_MEMORY(ctdb, outdata->dptr);
1572 list = (struct ctdb_control_tcp_tickle_list *)outdata->dptr;
1575 list->tickles.num = num;
1577 memcpy(&list->tickles.connections[0], tcparray->connections,
1578 sizeof(struct ctdb_tcp_connection) * num);
1586 set the list of all tcp tickles for a public address
1588 static int ctdb_ctrl_set_tcp_tickles(struct ctdb_context *ctdb,
1589 struct timeval timeout, uint32_t destnode,
1590 struct sockaddr_in *ip,
1591 struct ctdb_tcp_array *tcparray)
1595 struct ctdb_control_tcp_tickle_list *list;
1598 num = tcparray->num;
1603 data.dsize = offsetof(struct ctdb_control_tcp_tickle_list,
1604 tickles.connections) +
1605 sizeof(struct ctdb_tcp_connection) * num;
1606 data.dptr = talloc_size(ctdb, data.dsize);
1607 CTDB_NO_MEMORY(ctdb, data.dptr);
1609 list = (struct ctdb_control_tcp_tickle_list *)data.dptr;
1611 list->tickles.num = num;
1613 memcpy(&list->tickles.connections[0], tcparray->connections, sizeof(struct ctdb_tcp_connection) * num);
1616 ret = ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_CONNECTED, 0,
1617 CTDB_CONTROL_SET_TCP_TICKLE_LIST,
1618 0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
1620 DEBUG(0,(__location__ " ctdb_control for set tcp tickles failed\n"));
1624 talloc_free(data.dptr);
1631 perform tickle updates if required
1633 static void ctdb_update_tcp_tickles(struct event_context *ev,
1634 struct timed_event *te,
1635 struct timeval t, void *private_data)
1637 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
1639 struct ctdb_vnn *vnn;
1641 for (vnn=ctdb->vnn;vnn;vnn=vnn->next) {
1642 /* we only send out updates for public addresses that
1645 if (ctdb->pnn != vnn->pnn) {
1648 /* We only send out the updates if we need to */
1649 if (!vnn->tcp_update_needed) {
1652 ret = ctdb_ctrl_set_tcp_tickles(ctdb,
1654 CTDB_BROADCAST_CONNECTED,
1655 &vnn->public_address,
1658 DEBUG(0,("Failed to send the tickle update for public address %s\n",
1659 inet_ntoa(vnn->public_address.sin_addr)));
1663 event_add_timed(ctdb->ev, ctdb->tickle_update_context,
1664 timeval_current_ofs(ctdb->tunable.tickle_update_interval, 0),
1665 ctdb_update_tcp_tickles, ctdb);
1670 start periodic update of tcp tickles
1672 void ctdb_start_tcp_tickle_update(struct ctdb_context *ctdb)
1674 ctdb->tickle_update_context = talloc_new(ctdb);
1676 event_add_timed(ctdb->ev, ctdb->tickle_update_context,
1677 timeval_current_ofs(ctdb->tunable.tickle_update_interval, 0),
1678 ctdb_update_tcp_tickles, ctdb);
1684 struct control_gratious_arp {
1685 struct ctdb_context *ctdb;
1686 struct sockaddr_in sin;
1692 send a control_gratuitous arp
1694 static void send_gratious_arp(struct event_context *ev, struct timed_event *te,
1695 struct timeval t, void *private_data)
1698 struct control_gratious_arp *arp = talloc_get_type(private_data,
1699 struct control_gratious_arp);
1701 ret = ctdb_sys_send_arp(&arp->sin, arp->iface);
1703 DEBUG(0,(__location__ " sending of gratious arp failed (%s)\n", strerror(errno)));
1708 if (arp->count == CTDB_ARP_REPEAT) {
1713 event_add_timed(arp->ctdb->ev, arp,
1714 timeval_current_ofs(CTDB_ARP_INTERVAL, 0),
1715 send_gratious_arp, arp);
1722 int32_t ctdb_control_send_gratious_arp(struct ctdb_context *ctdb, TDB_DATA indata)
1724 struct ctdb_control_gratious_arp *gratious_arp = (struct ctdb_control_gratious_arp *)indata.dptr;
1725 struct control_gratious_arp *arp;
1728 /* verify the size of indata */
1729 if (indata.dsize < offsetof(struct ctdb_control_gratious_arp, iface)) {
1730 DEBUG(0,(__location__ " Too small indata to hold a ctdb_control_gratious_arp structure\n"));
1734 ( offsetof(struct ctdb_control_gratious_arp, iface)
1735 + gratious_arp->len ) ){
1737 DEBUG(0,(__location__ " Wrong size of indata. Was %d bytes "
1738 "but should be %d bytes\n",
1740 offsetof(struct ctdb_control_gratious_arp, iface)+gratious_arp->len));
1745 arp = talloc(ctdb, struct control_gratious_arp);
1746 CTDB_NO_MEMORY(ctdb, arp);
1749 arp->sin = gratious_arp->sin;
1750 arp->iface = talloc_strdup(arp, gratious_arp->iface);
1751 CTDB_NO_MEMORY(ctdb, arp->iface);
1754 event_add_timed(arp->ctdb->ev, arp,
1755 timeval_zero(), send_gratious_arp, arp);