4 Copyright (C) Ronnie Sahlberg 2007
5 Copyright (C) Andrew Tridgell 2007
6 Copyright (C) Martin Schwenke 2011
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, see <http://www.gnu.org/licenses/>.
25 #include "system/network.h"
27 #include "lib/util/debug.h"
29 #include "common/logging.h"
30 #include "common/rb_tree.h"
32 #include "server/ipalloc_private.h"
34 static void *add_ip_callback(void *parm, void *data)
36 struct public_ip_list *this_ip = parm;
37 struct public_ip_list *prev_ip = data;
39 if (prev_ip == NULL) {
42 if (this_ip->pnn == -1) {
43 this_ip->pnn = prev_ip->pnn;
49 static int getips_count_callback(void *param, void *data)
51 struct public_ip_list **ip_list = (struct public_ip_list **)param;
52 struct public_ip_list *new_ip = (struct public_ip_list *)data;
54 new_ip->next = *ip_list;
59 /* Nodes only know about those public addresses that they are
60 * configured to serve and no individual node has a full list of all
61 * public addresses configured across the cluster. Therefore, a
62 * merged list of all public addresses needs to be built so that IP
63 * allocation can be done. */
64 static struct public_ip_list *
65 create_merged_ip_list(struct ipalloc_state *ipalloc_state,
66 struct ctdb_public_ip_list *known_ips)
69 struct public_ip_list *ip_list;
70 struct ctdb_public_ip_list *public_ips;
71 struct trbt_tree *ip_tree;
73 ip_tree = trbt_create(ipalloc_state, 0);
75 if (known_ips == NULL) {
76 DEBUG(DEBUG_ERR, ("Known public IPs not set\n"));
80 for (i=0; i < ipalloc_state->num; i++) {
82 public_ips = &known_ips[i];
84 for (j=0; j < public_ips->num; j++) {
85 struct public_ip_list *tmp_ip;
87 /* This is returned as part of ip_list */
88 tmp_ip = talloc_zero(ipalloc_state, struct public_ip_list);
91 (__location__ " out of memory\n"));
96 /* Do not use information about IP addresses hosted
97 * on other nodes, it may not be accurate */
98 if (public_ips->ip[j].pnn == i) {
99 tmp_ip->pnn = public_ips->ip[j].pnn;
103 tmp_ip->addr = public_ips->ip[j].addr;
106 trbt_insertarray32_callback(ip_tree,
107 IP_KEYLEN, ip_key(&public_ips->ip[j].addr),
114 trbt_traversearray32(ip_tree, IP_KEYLEN, getips_count_callback, &ip_list);
115 talloc_free(ip_tree);
120 bool ipalloc_set_public_ips(struct ipalloc_state *ipalloc_state,
121 struct ctdb_public_ip_list *known_ips,
122 struct ctdb_public_ip_list *available_ips)
124 ipalloc_state->available_public_ips = available_ips;
126 ipalloc_state->all_ips = create_merged_ip_list(ipalloc_state,
129 return (ipalloc_state->all_ips != NULL);
132 /* This can only return false if there are no available IPs *and*
133 * there are no IP addresses currently allocated. If the latter is
134 * true then the cluster can clearly host IPs... just not necessarily
136 bool ipalloc_can_host_ips(struct ipalloc_state *ipalloc_state)
139 struct public_ip_list *ip_list;
142 for (ip_list = ipalloc_state->all_ips;
144 ip_list = ip_list->next) {
145 if (ip_list->pnn != -1) {
150 for (i=0; i < ipalloc_state->num; i++) {
151 if (ipalloc_state->available_public_ips[i].num != 0) {
159 /* The calculation part of the IP allocation algorithm. */
160 bool ipalloc(struct ipalloc_state *ipalloc_state)
164 switch (ipalloc_state->algorithm) {
166 ret = ipalloc_lcp2(ipalloc_state);
168 case IPALLOC_DETERMINISTIC:
169 ret = ipalloc_deterministic(ipalloc_state);
171 case IPALLOC_NONDETERMINISTIC:
172 ret = ipalloc_nondeterministic(ipalloc_state);
176 /* at this point ->pnn is the node which will own each IP
177 or -1 if there is no node that can cover this ip