4 Copyright (C) Ronnie Sahlberg 2009
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, see <http://www.gnu.org/licenses/>.
20 #include "system/time.h"
21 #include "system/network.h"
22 #include "system/filesys.h"
23 #include "system/wait.h"
28 #include "lib/util/debug.h"
29 #include "lib/util/samba_util.h"
31 #include "ctdb_private.h"
32 #include "ctdb_client.h"
33 #include "ctdb_logging.h"
35 #include "common/common.h"
37 static void ctdb_ban_node_event(struct tevent_context *ev,
38 struct tevent_timer *te,
39 struct timeval t, void *private_data)
41 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
43 /* Make sure we were able to freeze databases during banning */
44 if (!ctdb_db_all_frozen(ctdb)) {
45 DEBUG(DEBUG_ERR, ("Banning timedout, but still unable to freeze databases\n"));
50 DEBUG(DEBUG_ERR,("Banning timedout\n"));
51 ctdb->nodes[ctdb->pnn]->flags &= ~NODE_FLAGS_BANNED;
53 if (ctdb->banning_ctx != NULL) {
54 talloc_free(ctdb->banning_ctx);
55 ctdb->banning_ctx = NULL;
59 void ctdb_local_node_got_banned(struct ctdb_context *ctdb)
61 struct ctdb_db_context *ctdb_db;
63 DEBUG(DEBUG_NOTICE,("This node has been banned - forcing recovery\n"));
65 /* Reset the generation id to 1 to make us ignore any
66 REQ/REPLY CALL/DMASTER someone sends to us.
67 We are now banned so we shouldnt service database calls
70 ctdb->vnn_map->generation = INVALID_GENERATION;
71 for (ctdb_db = ctdb->db_list; ctdb_db != NULL; ctdb_db = ctdb_db->next) {
72 ctdb_db->generation = INVALID_GENERATION;
75 /* make sure we get frozen */
76 ctdb->recovery_mode = CTDB_RECOVERY_ACTIVE;
78 ctdb_release_all_ips(ctdb);
81 int32_t ctdb_control_set_ban_state(struct ctdb_context *ctdb, TDB_DATA indata)
83 struct ctdb_ban_time *bantime = (struct ctdb_ban_time *)indata.dptr;
86 DEBUG(DEBUG_INFO,("SET BAN STATE\n"));
88 if (bantime->pnn != ctdb->pnn) {
89 if (bantime->pnn >= ctdb->num_nodes) {
90 DEBUG(DEBUG_ERR,(__location__ " ERROR: Invalid ban request. PNN:%d is invalid. Max nodes %d\n", bantime->pnn, ctdb->num_nodes));
93 if (bantime->time == 0) {
94 DEBUG(DEBUG_NOTICE,("unbanning node %d\n", bantime->pnn));
95 ctdb->nodes[bantime->pnn]->flags &= ~NODE_FLAGS_BANNED;
97 DEBUG(DEBUG_NOTICE,("banning node %d\n", bantime->pnn));
98 if (ctdb->tunable.enable_bans == 0) {
99 /* FIXME: This is bogus. We really should be
100 * taking decision based on the tunables on
101 * the banned node and not local node.
103 DEBUG(DEBUG_WARNING,("Bans are disabled - ignoring ban of node %u\n", bantime->pnn));
107 ctdb->nodes[bantime->pnn]->flags |= NODE_FLAGS_BANNED;
112 already_banned = false;
113 if (ctdb->banning_ctx != NULL) {
114 talloc_free(ctdb->banning_ctx);
115 ctdb->banning_ctx = NULL;
116 already_banned = true;
119 if (bantime->time == 0) {
120 DEBUG(DEBUG_ERR,("Unbanning this node\n"));
121 ctdb->nodes[bantime->pnn]->flags &= ~NODE_FLAGS_BANNED;
125 if (ctdb->tunable.enable_bans == 0) {
126 DEBUG(DEBUG_ERR,("Bans are disabled - ignoring ban of node %u\n", bantime->pnn));
130 ctdb->banning_ctx = talloc(ctdb, struct ctdb_ban_time);
131 if (ctdb->banning_ctx == NULL) {
132 DEBUG(DEBUG_CRIT,(__location__ " ERROR Failed to allocate new banning state\n"));
135 *((struct ctdb_ban_time *)(ctdb->banning_ctx)) = *bantime;
138 DEBUG(DEBUG_ERR,("Banning this node for %d seconds\n", bantime->time));
139 ctdb->nodes[bantime->pnn]->flags |= NODE_FLAGS_BANNED;
141 tevent_add_timer(ctdb->ev, ctdb->banning_ctx,
142 timeval_current_ofs(bantime->time,0),
143 ctdb_ban_node_event, ctdb);
145 if (!already_banned) {
146 ctdb_local_node_got_banned(ctdb);
151 int32_t ctdb_control_get_ban_state(struct ctdb_context *ctdb, TDB_DATA *outdata)
153 struct ctdb_ban_time *bantime;
155 bantime = talloc(outdata, struct ctdb_ban_time);
156 CTDB_NO_MEMORY(ctdb, bantime);
158 if (ctdb->banning_ctx != NULL) {
159 *bantime = *(struct ctdb_ban_time *)(ctdb->banning_ctx);
161 bantime->pnn = ctdb->pnn;
165 outdata->dptr = (uint8_t *)bantime;
166 outdata->dsize = sizeof(struct ctdb_ban_time);
171 /* Routine to ban ourselves for a while when trouble strikes. */
172 void ctdb_ban_self(struct ctdb_context *ctdb)
175 struct ctdb_ban_time bantime;
177 bantime.pnn = ctdb->pnn;
178 bantime.time = ctdb->tunable.recovery_ban_period;
180 data.dsize = sizeof(bantime);
181 data.dptr = (uint8_t *)&bantime;
183 ctdb_control_set_ban_state(ctdb, data);