Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3286 insertions, 0 deletions

diff --git a/ctdb/server/ctdb_recoverd.c b/ctdb/server/ctdb_recoverd.c
new file mode 100644
index 0000000..84e2081
--- /dev/null
+++ b/ctdb/server/ctdb_recoverd.c
@@ -0,0 +1,3286 @@
+/* 
+   ctdb recovery daemon
+
+   Copyright (C) Ronnie Sahlberg  2007
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include "system/filesys.h"
+#include "system/time.h"
+#include "system/network.h"
+#include "system/wait.h"
+
+#include <popt.h>
+#include <talloc.h>
+#include <tevent.h>
+#include <tdb.h>
+
+#include "lib/tdb_wrap/tdb_wrap.h"
+#include "lib/util/dlinklist.h"
+#include "lib/util/debug.h"
+#include "lib/util/samba_util.h"
+#include "lib/util/sys_rw.h"
+#include "lib/util/util_process.h"
+
+#include "ctdb_private.h"
+#include "ctdb_client.h"
+
+#include "protocol/protocol_basic.h"
+
+#include "common/system_socket.h"
+#include "common/common.h"
+#include "common/logging.h"
+
+#include "server/ctdb_config.h"
+
+#include "ctdb_cluster_mutex.h"
+
+/* List of SRVID requests that need to be processed */
+struct srvid_list {
+	struct srvid_list *next, *prev;
+	struct ctdb_srvid_message *request;
+};
+
+struct srvid_requests {
+	struct srvid_list *requests;
+};
+
+static void srvid_request_reply(struct ctdb_context *ctdb,
+				struct ctdb_srvid_message *request,
+				TDB_DATA result)
+{
+	/* Someone that sent srvid==0 does not want a reply */
+	if (request->srvid == 0) {
+		talloc_free(request);
+		return;
+	}
+
+	if (ctdb_client_send_message(ctdb, request->pnn, request->srvid,
+				     result) == 0) {
+		DEBUG(DEBUG_INFO,("Sent SRVID reply to %u:%llu\n",
+				  (unsigned)request->pnn,
+				  (unsigned long long)request->srvid));
+	} else {
+		DEBUG(DEBUG_ERR,("Failed to send SRVID reply to %u:%llu\n",
+				 (unsigned)request->pnn,
+				 (unsigned long long)request->srvid));
+	}
+
+	talloc_free(request);
+}
+
+static void srvid_requests_reply(struct ctdb_context *ctdb,
+				 struct srvid_requests **requests,
+				 TDB_DATA result)
+{
+	struct srvid_list *r;
+
+	if (*requests == NULL) {
+		return;
+	}
+
+	for (r = (*requests)->requests; r != NULL; r = r->next) {
+		srvid_request_reply(ctdb, r->request, result);
+	}
+
+	/* Free the list structure... */
+	TALLOC_FREE(*requests);
+}
+
+static void srvid_request_add(struct ctdb_context *ctdb,
+			      struct srvid_requests **requests,
+			      struct ctdb_srvid_message *request)
+{
+	struct srvid_list *t;
+	int32_t ret;
+	TDB_DATA result;
+
+	if (*requests == NULL) {
+		*requests = talloc_zero(ctdb, struct srvid_requests);
+		if (*requests == NULL) {
+			goto nomem;
+		}
+	}
+
+	t = talloc_zero(*requests, struct srvid_list);
+	if (t == NULL) {
+		/* If *requests was just allocated above then free it */
+		if ((*requests)->requests == NULL) {
+			TALLOC_FREE(*requests);
+		}
+		goto nomem;
+	}
+
+	t->request = (struct ctdb_srvid_message *)talloc_steal(t, request);
+	DLIST_ADD((*requests)->requests, t);
+
+	return;
+
+nomem:
+	/* Failed to add the request to the list.  Send a fail. */
+	DEBUG(DEBUG_ERR, (__location__
+			  " Out of memory, failed to queue SRVID request\n"));
+	ret = -ENOMEM;
+	result.dsize = sizeof(ret);
+	result.dptr = (uint8_t *)&ret;
+	srvid_request_reply(ctdb, request, result);
+}
+
+/* An abstraction to allow an operation (takeover runs, recoveries,
+ * ...) to be disabled for a given timeout */
+struct ctdb_op_state {
+	struct tevent_timer *timer;
+	bool in_progress;
+	const char *name;
+};
+
+static struct ctdb_op_state *ctdb_op_init(TALLOC_CTX *mem_ctx, const char *name)
+{
+	struct ctdb_op_state *state = talloc_zero(mem_ctx, struct ctdb_op_state);
+
+	if (state != NULL) {
+		state->in_progress = false;
+		state->name = name;
+	}
+
+	return state;
+}
+
+static bool ctdb_op_is_disabled(struct ctdb_op_state *state)
+{
+	return state->timer != NULL;
+}
+
+static bool ctdb_op_begin(struct ctdb_op_state *state)
+{
+	if (ctdb_op_is_disabled(state)) {
+		DEBUG(DEBUG_NOTICE,
+		      ("Unable to begin - %s are disabled\n", state->name));
+		return false;
+	}
+
+	state->in_progress = true;
+	return true;
+}
+
+static bool ctdb_op_end(struct ctdb_op_state *state)
+{
+	return state->in_progress = false;
+}
+
+static bool ctdb_op_is_in_progress(struct ctdb_op_state *state)
+{
+	return state->in_progress;
+}
+
+static void ctdb_op_enable(struct ctdb_op_state *state)
+{
+	TALLOC_FREE(state->timer);
+}
+
+static void ctdb_op_timeout_handler(struct tevent_context *ev,
+				    struct tevent_timer *te,
+				    struct timeval yt, void *p)
+{
+	struct ctdb_op_state *state =
+		talloc_get_type(p, struct ctdb_op_state);
+
+	DEBUG(DEBUG_NOTICE,("Reenabling %s after timeout\n", state->name));
+	ctdb_op_enable(state);
+}
+
+static int ctdb_op_disable(struct ctdb_op_state *state,
+			   struct tevent_context *ev,
+			   uint32_t timeout)
+{
+	if (timeout == 0) {
+		DEBUG(DEBUG_NOTICE,("Reenabling %s\n", state->name));
+		ctdb_op_enable(state);
+		return 0;
+	}
+
+	if (state->in_progress) {
+		DEBUG(DEBUG_ERR,
+		      ("Unable to disable %s - in progress\n", state->name));
+		return -EAGAIN;
+	}
+
+	DEBUG(DEBUG_NOTICE,("Disabling %s for %u seconds\n",
+			    state->name, timeout));
+
+	/* Clear any old timers */
+	talloc_free(state->timer);
+
+	/* Arrange for the timeout to occur */
+	state->timer = tevent_add_timer(ev, state,
+					timeval_current_ofs(timeout, 0),
+					ctdb_op_timeout_handler, state);
+	if (state->timer == NULL) {
+		DEBUG(DEBUG_ERR,(__location__ " Unable to setup timer\n"));
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+struct ctdb_banning_state {
+	uint32_t pnn;
+	uint32_t count;
+	struct timeval last_reported_time;
+};
+
+struct ctdb_cluster_lock_handle;
+
+/*
+  private state of recovery daemon
+ */
+struct ctdb_recoverd {
+	struct ctdb_context *ctdb;
+	uint32_t leader;
+	struct tevent_timer *leader_broadcast_te;
+	struct tevent_timer *leader_broadcast_timeout_te;
+	uint32_t pnn;
+	uint32_t last_culprit_node;
+	struct ctdb_banning_state *banning_state;
+	struct ctdb_node_map_old *nodemap;
+	struct timeval priority_time;
+	bool need_takeover_run;
+	bool need_recovery;
+	uint32_t node_flags;
+	struct tevent_timer *send_election_te;
+	bool election_in_progress;
+	struct tevent_timer *election_timeout;
+	struct srvid_requests *reallocate_requests;
+	struct ctdb_op_state *takeover_run;
+	struct ctdb_op_state *recovery;
+	struct ctdb_iface_list_old *ifaces;
+	uint32_t *force_rebalance_nodes;
+	struct ctdb_node_capabilities *caps;
+	bool frozen_on_inactive;
+	struct ctdb_cluster_lock_handle *cluster_lock_handle;
+	pid_t helper_pid;
+};
+
+#define CONTROL_TIMEOUT() timeval_current_ofs(ctdb->tunable.recover_timeout, 0)
+#define MONITOR_TIMEOUT() timeval_current_ofs(ctdb->tunable.recover_interval, 0)
+
+static void ctdb_restart_recd(struct tevent_context *ev,
+			      struct tevent_timer *te, struct timeval t,
+			      void *private_data);
+
+static bool this_node_is_leader(struct ctdb_recoverd *rec)
+{
+	return rec->leader == rec->pnn;
+}
+
+static bool this_node_can_be_leader(struct ctdb_recoverd *rec)
+{
+	return (rec->node_flags & NODE_FLAGS_INACTIVE) == 0 &&
+		(rec->ctdb->capabilities & CTDB_CAP_RECMASTER) != 0;
+}
+
+static bool node_flags(struct ctdb_recoverd *rec, uint32_t pnn, uint32_t *flags)
+{
+	size_t i;
+
+	for (i = 0; i < rec->nodemap->num; i++) {
+		struct ctdb_node_and_flags *node = &rec->nodemap->nodes[i];
+		if (node->pnn == pnn) {
+			if (flags != NULL) {
+				*flags = node->flags;
+			}
+			return true;
+		}
+	}
+
+	return false;
+}
+
+/*
+  ban a node for a period of time
+ */
+static void ctdb_ban_node(struct ctdb_recoverd *rec, uint32_t pnn)
+{
+	int ret;
+	struct ctdb_context *ctdb = rec->ctdb;
+	uint32_t ban_time = ctdb->tunable.recovery_ban_period;
+	struct ctdb_ban_state bantime;
+
+	if (!ctdb_validate_pnn(ctdb, pnn)) {
+		DEBUG(DEBUG_ERR,("Bad pnn %u in ctdb_ban_node\n", pnn));
+		return;
+	}
+
+	DEBUG(DEBUG_NOTICE,("Banning node %u for %u seconds\n", pnn, ban_time));
+
+	bantime.pnn  = pnn;
+	bantime.time = ban_time;
+
+	ret = ctdb_ctrl_set_ban(ctdb, CONTROL_TIMEOUT(), pnn, &bantime);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR,(__location__ " Failed to ban node %d\n", pnn));
+		return;
+	}
+
+}
+
+enum monitor_result { MONITOR_OK, MONITOR_RECOVERY_NEEDED, MONITOR_ELECTION_NEEDED, MONITOR_FAILED};
+
+
+/*
+  remember the trouble maker
+ */
+static void ctdb_set_culprit_count(struct ctdb_recoverd *rec,
+				   uint32_t culprit,
+				   uint32_t count)
+{
+	struct ctdb_context *ctdb = talloc_get_type_abort(
+		rec->ctdb, struct ctdb_context);
+	struct ctdb_banning_state *ban_state = NULL;
+	size_t len;
+	bool ok;
+
+	ok = node_flags(rec, culprit, NULL);
+	if (!ok) {
+		DBG_WARNING("Unknown culprit node %"PRIu32"\n", culprit);
+		return;
+	}
+
+	/* If we are banned or stopped, do not set other nodes as culprits */
+	if (rec->node_flags & NODE_FLAGS_INACTIVE) {
+		D_WARNING("This node is INACTIVE, cannot set culprit node %d\n",
+			  culprit);
+		return;
+	}
+
+	if (rec->banning_state == NULL) {
+		len = 0;
+	} else {
+		size_t i;
+
+		len = talloc_array_length(rec->banning_state);
+
+		for (i = 0 ; i < len; i++) {
+			if (rec->banning_state[i].pnn == culprit) {
+				ban_state= &rec->banning_state[i];
+				break;
+			}
+		}
+	}
+
+	/* Not found, so extend (or allocate new) array */
+	if (ban_state == NULL) {
+		struct ctdb_banning_state *t;
+
+		len += 1;
+		/*
+		 * talloc_realloc() handles the corner case where
+		 * rec->banning_state is NULL
+		 */
+		t = talloc_realloc(rec,
+				   rec->banning_state,
+				   struct ctdb_banning_state,
+				   len);
+		if (t == NULL) {
+			DBG_WARNING("Memory allocation error\n");
+			return;
+		}
+		rec->banning_state = t;
+
+		/* New element is always at the end - initialise it... */
+		ban_state = &rec->banning_state[len - 1];
+		*ban_state = (struct ctdb_banning_state) {
+			.pnn = culprit,
+			.count = 0,
+		};
+	} else if (ban_state->count > 0 &&
+		   timeval_elapsed(&ban_state->last_reported_time) >
+		   ctdb->tunable.recovery_grace_period) {
+		/*
+		 * Forgive old transgressions beyond the tunable time-limit
+		 */
+		ban_state->count = 0;
+	}
+
+	ban_state->count += count;
+	ban_state->last_reported_time = timeval_current();
+	rec->last_culprit_node = culprit;
+}
+
+static void ban_counts_reset(struct ctdb_recoverd *rec)
+{
+	D_NOTICE("Resetting ban count to 0 for all nodes\n");
+	TALLOC_FREE(rec->banning_state);
+}
+
+/*
+  remember the trouble maker
+ */
+static void ctdb_set_culprit(struct ctdb_recoverd *rec, uint32_t culprit)
+{
+	ctdb_set_culprit_count(rec, culprit, 1);
+}
+
+/*
+  Retrieve capabilities from all connected nodes
+ */
+static int update_capabilities(struct ctdb_recoverd *rec,
+			       struct ctdb_node_map_old *nodemap)
+{
+	uint32_t *capp;
+	TALLOC_CTX *tmp_ctx;
+	struct ctdb_node_capabilities *caps;
+	struct ctdb_context *ctdb = rec->ctdb;
+
+	tmp_ctx = talloc_new(rec);
+	CTDB_NO_MEMORY(ctdb, tmp_ctx);
+
+	caps = ctdb_get_capabilities(ctdb, tmp_ctx,
+				     CONTROL_TIMEOUT(), nodemap);
+
+	if (caps == NULL) {
+		DEBUG(DEBUG_ERR,
+		      (__location__ " Failed to get node capabilities\n"));
+		talloc_free(tmp_ctx);
+		return -1;
+	}
+
+	capp = ctdb_get_node_capabilities(caps, rec->pnn);
+	if (capp == NULL) {
+		DEBUG(DEBUG_ERR,
+		      (__location__
+		       " Capabilities don't include current node.\n"));
+		talloc_free(tmp_ctx);
+		return -1;
+	}
+	ctdb->capabilities = *capp;
+
+	TALLOC_FREE(rec->caps);
+	rec->caps = talloc_steal(rec, caps);
+
+	talloc_free(tmp_ctx);
+	return 0;
+}
+
+/*
+  change recovery mode on all nodes
+ */
+static int set_recovery_mode(struct ctdb_context *ctdb,
+			     struct ctdb_recoverd *rec,
+			     struct ctdb_node_map_old *nodemap,
+			     uint32_t rec_mode)
+{
+	TDB_DATA data;
+	uint32_t *nodes;
+	TALLOC_CTX *tmp_ctx;
+
+	tmp_ctx = talloc_new(ctdb);
+	CTDB_NO_MEMORY(ctdb, tmp_ctx);
+
+	nodes = list_of_active_nodes(ctdb, nodemap, tmp_ctx, true);
+
+	data.dsize = sizeof(uint32_t);
+	data.dptr = (unsigned char *)&rec_mode;
+
+	if (ctdb_client_async_control(ctdb, CTDB_CONTROL_SET_RECMODE,
+					nodes, 0,
+					CONTROL_TIMEOUT(),
+					false, data,
+					NULL, NULL,
+					NULL) != 0) {
+		DEBUG(DEBUG_ERR, (__location__ " Unable to set recovery mode. Recovery failed.\n"));
+		talloc_free(tmp_ctx);
+		return -1;
+	}
+
+	talloc_free(tmp_ctx);
+	return 0;
+}
+
+/*
+ * Update flags on all connected nodes
+ */
+static int update_flags_on_all_nodes(struct ctdb_recoverd *rec,
+				     uint32_t pnn,
+				     uint32_t flags)
+{
+	struct ctdb_context *ctdb = rec->ctdb;
+	struct timeval timeout = CONTROL_TIMEOUT();
+	TDB_DATA data;
+	struct ctdb_node_map_old *nodemap=NULL;
+	struct ctdb_node_flag_change c;
+	TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
+	uint32_t *nodes;
+	uint32_t i;
+	int ret;
+
+	nodemap = rec->nodemap;
+
+	for (i = 0; i < nodemap->num; i++) {
+		if (pnn == nodemap->nodes[i].pnn) {
+			break;
+		}
+	}
+	if (i >= nodemap->num) {
+		DBG_ERR("Nodemap does not contain node %d\n", pnn);
+		talloc_free(tmp_ctx);
+		return -1;
+	}
+
+	c.pnn       = pnn;
+	c.old_flags = nodemap->nodes[i].flags;
+	c.new_flags = flags;
+
+	data.dsize = sizeof(c);
+	data.dptr = (unsigned char *)&c;
+
+	/* send the flags update to all connected nodes */
+	nodes = list_of_connected_nodes(ctdb, nodemap, tmp_ctx, true);
+
+	ret = ctdb_client_async_control(ctdb,
+					CTDB_CONTROL_MODIFY_FLAGS,
+					nodes,
+					0,
+					timeout,
+					false,
+					data,
+					NULL,
+					NULL,
+					NULL);
+	if (ret != 0) {
+		DBG_ERR("Unable to update flags on remote nodes\n");
+		talloc_free(tmp_ctx);
+		return -1;
+	}
+
+	talloc_free(tmp_ctx);
+	return 0;
+}
+
+static bool _cluster_lock_lock(struct ctdb_recoverd *rec);
+static bool cluster_lock_held(struct ctdb_recoverd *rec);
+
+static bool cluster_lock_enabled(struct ctdb_recoverd *rec)
+{
+	return rec->ctdb->recovery_lock != NULL;
+}
+
+static bool cluster_lock_take(struct ctdb_recoverd *rec)
+{
+	struct ctdb_context *ctdb = rec->ctdb;
+	bool have_lock;
+
+	if (!cluster_lock_enabled(rec)) {
+		return true;
+	}
+
+	if (cluster_lock_held(rec)) {
+		D_NOTICE("Already holding cluster lock\n");
+		return true;
+	}
+
+	D_NOTICE("Attempting to take cluster lock (%s)\n", ctdb->recovery_lock);
+	have_lock = _cluster_lock_lock(rec);
+	if (!have_lock) {
+		return false;
+	}
+
+	D_NOTICE("Cluster lock taken successfully\n");
+	return true;
+}
+
+/*
+  called when ctdb_wait_timeout should finish
+ */
+static void ctdb_wait_handler(struct tevent_context *ev,
+			      struct tevent_timer *te,
+			      struct timeval yt, void *p)
+{
+	uint32_t *timed_out = (uint32_t *)p;
+	(*timed_out) = 1;
+}
+
+/*
+  wait for a given number of seconds
+ */
+static void ctdb_wait_timeout(struct ctdb_context *ctdb, double secs)
+{
+	uint32_t timed_out = 0;
+	uint32_t usecs = (secs - (uint32_t)secs) * 1000000;
+	tevent_add_timer(ctdb->ev, ctdb, timeval_current_ofs(secs, usecs),
+			 ctdb_wait_handler, &timed_out);
+	while (!timed_out) {
+		tevent_loop_once(ctdb->ev);
+	}
+}
+
+/*
+ * Broadcast cluster leader
+ */
+
+static int leader_broadcast_send(struct ctdb_recoverd *rec, uint32_t pnn)
+{
+	struct ctdb_context *ctdb = rec->ctdb;
+	TDB_DATA data;
+	int ret;
+
+	data.dptr = (uint8_t *)&pnn;
+	data.dsize = sizeof(pnn);
+
+	ret = ctdb_client_send_message(ctdb,
+				       CTDB_BROADCAST_CONNECTED,
+				       CTDB_SRVID_LEADER,
+				       data);
+	return ret;
+}
+
+static int leader_broadcast_loop(struct ctdb_recoverd *rec);
+static void cluster_lock_release(struct ctdb_recoverd *rec);
+
+/* This runs continuously but only sends the broadcast when leader */
+static void leader_broadcast_loop_handler(struct tevent_context *ev,
+					  struct tevent_timer *te,
+					  struct timeval current_time,
+					  void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type_abort(
+		private_data, struct ctdb_recoverd);
+	int ret;
+
+	if (!this_node_can_be_leader(rec)) {
+		if (this_node_is_leader(rec)) {
+			rec->leader = CTDB_UNKNOWN_PNN;
+		}
+		if (cluster_lock_enabled(rec) && cluster_lock_held(rec)) {
+			cluster_lock_release(rec);
+		}
+		goto done;
+	}
+
+	if (!this_node_is_leader(rec)) {
+		goto done;
+	}
+
+	if (rec->election_in_progress) {
+		goto done;
+	}
+
+	ret = leader_broadcast_send(rec, rec->leader);
+	if (ret != 0) {
+		DBG_WARNING("Failed to send leader broadcast\n");
+	}
+
+done:
+	ret = leader_broadcast_loop(rec);
+	if (ret != 0) {
+		D_WARNING("Failed to set up leader broadcast\n");
+	}
+}
+
+static int leader_broadcast_loop(struct ctdb_recoverd *rec)
+{
+	struct ctdb_context *ctdb = rec->ctdb;
+
+	TALLOC_FREE(rec->leader_broadcast_te);
+	rec->leader_broadcast_te =
+		tevent_add_timer(ctdb->ev,
+				 rec,
+				 timeval_current_ofs(1, 0),
+				 leader_broadcast_loop_handler,
+				 rec);
+	if (rec->leader_broadcast_te == NULL) {
+		return ENOMEM;
+	}
+
+	return 0;
+}
+
+static bool leader_broadcast_loop_active(struct ctdb_recoverd *rec)
+{
+	return rec->leader_broadcast_te != NULL;
+}
+
+/*
+  called when an election times out (ends)
+ */
+static void ctdb_election_timeout(struct tevent_context *ev,
+				  struct tevent_timer *te,
+				  struct timeval t, void *p)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(p, struct ctdb_recoverd);
+	bool ok;
+
+	rec->election_in_progress = false;
+	rec->election_timeout = NULL;
+	fast_start = false;
+
+	D_WARNING("Election period ended, leader=%u\n", rec->leader);
+
+	if (!this_node_is_leader(rec)) {
+		return;
+	}
+
+	ok = cluster_lock_take(rec);
+	if (!ok) {
+		D_ERR("Unable to get cluster lock, banning node\n");
+		ctdb_ban_node(rec, rec->pnn);
+	}
+}
+
+
+/*
+  wait for an election to finish. It finished election_timeout seconds after
+  the last election packet is received
+ */
+static void ctdb_wait_election(struct ctdb_recoverd *rec)
+{
+	struct ctdb_context *ctdb = rec->ctdb;
+	while (rec->election_in_progress) {
+		tevent_loop_once(ctdb->ev);
+	}
+}
+
+/*
+ * Update local flags from all remote connected nodes and push out
+ * flags changes to all nodes.  This is only run by the leader.
+ */
+static int update_flags(struct ctdb_recoverd *rec,
+			struct ctdb_node_map_old *nodemap,
+			struct ctdb_node_map_old **remote_nodemaps)
+{
+	unsigned int j;
+	struct ctdb_context *ctdb = rec->ctdb;
+	TALLOC_CTX *mem_ctx = talloc_new(ctdb);
+
+	/* Check flags from remote nodes */
+	for (j=0; j<nodemap->num; j++) {
+		struct ctdb_node_map_old *remote_nodemap=NULL;
+		uint32_t local_flags = nodemap->nodes[j].flags;
+		uint32_t remote_pnn = nodemap->nodes[j].pnn;
+		uint32_t remote_flags;
+		unsigned int i;
+		int ret;
+
+		if (local_flags & NODE_FLAGS_DISCONNECTED) {
+			continue;
+		}
+		if (remote_pnn == rec->pnn) {
+			/*
+			 * No remote nodemap for this node since this
+			 * is the local nodemap.  However, still need
+			 * to check this against the remote nodes and
+			 * push it if they are out-of-date.
+			 */
+			goto compare_remotes;
+		}
+
+		remote_nodemap = remote_nodemaps[j];
+		remote_flags = remote_nodemap->nodes[j].flags;
+
+		if (local_flags != remote_flags) {
+			/*
+			 * Update the local copy of the flags in the
+			 * recovery daemon.
+			 */
+			D_NOTICE("Remote node %u had flags 0x%x, "
+				 "local had 0x%x - updating local\n",
+				 remote_pnn,
+				 remote_flags,
+				 local_flags);
+			nodemap->nodes[j].flags = remote_flags;
+			local_flags = remote_flags;
+			goto push;
+		}
+
+compare_remotes:
+		for (i = 0; i < nodemap->num; i++) {
+			if (i == j) {
+				continue;
+			}
+			if (nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
+				continue;
+			}
+			if (nodemap->nodes[i].pnn == rec->pnn) {
+				continue;
+			}
+
+			remote_nodemap = remote_nodemaps[i];
+			remote_flags = remote_nodemap->nodes[j].flags;
+
+			if (local_flags != remote_flags) {
+				goto push;
+			}
+		}
+
+		continue;
+
+push:
+		D_NOTICE("Pushing updated flags for node %u (0x%x)\n",
+			 remote_pnn,
+			 local_flags);
+		ret = update_flags_on_all_nodes(rec, remote_pnn, local_flags);
+		if (ret != 0) {
+			DBG_ERR("Unable to update flags on remote nodes\n");
+			talloc_free(mem_ctx);
+			return -1;
+		}
+	}
+	talloc_free(mem_ctx);
+	return 0;
+}
+
+
+/* Create a new random generation id.
+   The generation id can not be the INVALID_GENERATION id
+*/
+static uint32_t new_generation(void)
+{
+	uint32_t generation;
+
+	while (1) {
+		generation = random();
+
+		if (generation != INVALID_GENERATION) {
+			break;
+		}
+	}
+
+	return generation;
+}
+
+static bool cluster_lock_held(struct ctdb_recoverd *rec)
+{
+	return (rec->cluster_lock_handle != NULL);
+}
+
+struct ctdb_cluster_lock_handle {
+	bool done;
+	bool locked;
+	double latency;
+	struct ctdb_cluster_mutex_handle *h;
+	struct ctdb_recoverd *rec;
+};
+
+static void take_cluster_lock_handler(char status,
+				      double latency,
+				      void *private_data)
+{
+	struct ctdb_cluster_lock_handle *s =
+		(struct ctdb_cluster_lock_handle *) private_data;
+
+	s->locked = (status == '0') ;
+
+	/*
+	 * If unsuccessful then ensure the process has exited and that
+	 * the file descriptor event handler has been cancelled
+	 */
+	if (! s->locked) {
+		TALLOC_FREE(s->h);
+	}
+
+	switch (status) {
+	case '0':
+		s->latency = latency;
+		break;
+
+	case '1':
+		D_ERR("Unable to take cluster lock - contention\n");
+		break;
+
+	case '2':
+		D_ERR("Unable to take cluster lock - timeout\n");
+		break;
+
+	default:
+		D_ERR("Unable to take cluster lock - unknown error\n");
+	}
+
+	s->done = true;
+}
+
+static void force_election(struct ctdb_recoverd *rec);
+
+static void lost_cluster_lock_handler(void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type_abort(
+		private_data, struct ctdb_recoverd);
+
+	D_ERR("Cluster lock helper terminated\n");
+	TALLOC_FREE(rec->cluster_lock_handle);
+
+	if (this_node_can_be_leader(rec)) {
+		force_election(rec);
+	}
+}
+
+static bool _cluster_lock_lock(struct ctdb_recoverd *rec)
+{
+	struct ctdb_context *ctdb = rec->ctdb;
+	struct ctdb_cluster_mutex_handle *h;
+	struct ctdb_cluster_lock_handle *s;
+
+	s = talloc_zero(rec, struct ctdb_cluster_lock_handle);
+	if (s == NULL) {
+		DBG_ERR("Memory allocation error\n");
+		return false;
+	};
+
+	s->rec = rec;
+
+	h = ctdb_cluster_mutex(s,
+			       ctdb,
+			       ctdb->recovery_lock,
+			       120,
+			       take_cluster_lock_handler,
+			       s,
+			       lost_cluster_lock_handler,
+			       rec);
+	if (h == NULL) {
+		talloc_free(s);
+		return false;
+	}
+
+	rec->cluster_lock_handle = s;
+	s->h = h;
+
+	while (! s->done) {
+		tevent_loop_once(ctdb->ev);
+	}
+
+	if (! s->locked) {
+		TALLOC_FREE(rec->cluster_lock_handle);
+		return false;
+	}
+
+	ctdb_ctrl_report_recd_lock_latency(ctdb,
+					   CONTROL_TIMEOUT(),
+					   s->latency);
+
+	return true;
+}
+
+static void cluster_lock_release(struct ctdb_recoverd *rec)
+{
+	if (rec->cluster_lock_handle == NULL) {
+		return;
+	}
+
+	if (! rec->cluster_lock_handle->done) {
+		/*
+		 * Taking of cluster lock still in progress.  Free
+		 * the cluster mutex handle to release it but leave
+		 * the cluster lock handle in place to allow taking
+		 * of the lock to fail.
+		 */
+		D_NOTICE("Cancelling cluster lock\n");
+		TALLOC_FREE(rec->cluster_lock_handle->h);
+		rec->cluster_lock_handle->done = true;
+		rec->cluster_lock_handle->locked = false;
+		return;
+	}
+
+	D_NOTICE("Releasing cluster lock\n");
+	TALLOC_FREE(rec->cluster_lock_handle);
+}
+
+static void ban_misbehaving_nodes(struct ctdb_recoverd *rec, bool *self_ban)
+{
+	size_t len = talloc_array_length(rec->banning_state);
+	size_t i;
+
+
+	*self_ban = false;
+	for (i = 0; i < len; i++) {
+		struct ctdb_banning_state *ban_state = &rec->banning_state[i];
+
+		if (ban_state->count < 2 * rec->nodemap->num) {
+			continue;
+		}
+
+		D_NOTICE("Node %u reached %u banning credits\n",
+			 ban_state->pnn,
+			 ban_state->count);
+		ctdb_ban_node(rec, ban_state->pnn);
+		ban_state->count = 0;
+
+		/* Banning ourself? */
+		if (ban_state->pnn == rec->pnn) {
+			*self_ban = true;
+		}
+	}
+}
+
+struct helper_state {
+	int fd[2];
+	pid_t pid;
+	int result;
+	bool done;
+};
+
+static void helper_handler(struct tevent_context *ev,
+			   struct tevent_fd *fde,
+			   uint16_t flags, void *private_data)
+{
+	struct helper_state *state = talloc_get_type_abort(
+		private_data, struct helper_state);
+	int ret;
+
+	ret = sys_read(state->fd[0], &state->result, sizeof(state->result));
+	if (ret != sizeof(state->result)) {
+		state->result = EPIPE;
+	}
+
+	state->done = true;
+}
+
+static int helper_run(struct ctdb_recoverd *rec, TALLOC_CTX *mem_ctx,
+		      const char *prog, const char *arg, const char *type)
+{
+	struct helper_state *state;
+	struct tevent_fd *fde;
+	const char **args;
+	int nargs, ret;
+
+	state = talloc_zero(mem_ctx, struct helper_state);
+	if (state == NULL) {
+		DEBUG(DEBUG_ERR, (__location__ " memory error\n"));
+		return -1;
+	}
+
+	state->pid = -1;
+
+	ret = pipe(state->fd);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR,
+		      ("Failed to create pipe for %s helper\n", type));
+		goto fail;
+	}
+
+	set_close_on_exec(state->fd[0]);
+
+	nargs = 4;
+	args = talloc_array(state, const char *, nargs);
+	if (args == NULL) {
+		DEBUG(DEBUG_ERR, (__location__ " memory error\n"));
+		goto fail;
+	}
+
+	args[0] = talloc_asprintf(args, "%d", state->fd[1]);
+	if (args[0] == NULL) {
+		DEBUG(DEBUG_ERR, (__location__ " memory error\n"));
+		goto fail;
+	}
+	args[1] = rec->ctdb->daemon.name;
+	args[2] = arg;
+	args[3] = NULL;
+
+	if (args[2] == NULL) {
+		nargs = 3;
+	}
+
+	state->pid = ctdb_vfork_exec(state, rec->ctdb, prog, nargs, args);
+	if (state->pid == -1) {
+		DEBUG(DEBUG_ERR,
+		      ("Failed to create child for %s helper\n", type));
+		goto fail;
+	}
+
+	close(state->fd[1]);
+	state->fd[1] = -1;
+
+	rec->helper_pid = state->pid;
+	state->done = false;
+
+	fde = tevent_add_fd(rec->ctdb->ev, state, state->fd[0],
+			    TEVENT_FD_READ, helper_handler, state);
+	if (fde == NULL) {
+		goto fail;
+	}
+	tevent_fd_set_auto_close(fde);
+
+	while (!state->done) {
+		tevent_loop_once(rec->ctdb->ev);
+
+		if (!this_node_is_leader(rec)) {
+			D_ERR("Leader changed to %u, aborting %s\n",
+			      rec->leader,
+			      type);
+			state->result = 1;
+			break;
+		}
+	}
+
+	close(state->fd[0]);
+	state->fd[0] = -1;
+
+	if (state->result != 0) {
+		goto fail;
+	}
+
+	rec->helper_pid = -1;
+	ctdb_kill(rec->ctdb, state->pid, SIGKILL);
+	talloc_free(state);
+	return 0;
+
+fail:
+	if (state->fd[0] != -1) {
+		close(state->fd[0]);
+	}
+	if (state->fd[1] != -1) {
+		close(state->fd[1]);
+	}
+	rec->helper_pid = -1;
+	if (state->pid != -1) {
+		ctdb_kill(rec->ctdb, state->pid, SIGKILL);
+	}
+	talloc_free(state);
+	return -1;
+}
+
+
+static int ctdb_takeover(struct ctdb_recoverd *rec,
+			 uint32_t *force_rebalance_nodes)
+{
+	static char prog[PATH_MAX+1] = "";
+	char *arg;
+	unsigned int i;
+	int ret;
+
+	if (!ctdb_set_helper("takeover_helper", prog, sizeof(prog),
+			     "CTDB_TAKEOVER_HELPER", CTDB_HELPER_BINDIR,
+			     "ctdb_takeover_helper")) {
+		ctdb_die(rec->ctdb, "Unable to set takeover helper\n");
+	}
+
+	arg = NULL;
+	for (i = 0; i < talloc_array_length(force_rebalance_nodes); i++) {
+		uint32_t pnn = force_rebalance_nodes[i];
+		if (arg == NULL) {
+			arg = talloc_asprintf(rec, "%u", pnn);
+		} else {
+			arg = talloc_asprintf_append(arg, ",%u", pnn);
+		}
+		if (arg == NULL) {
+			DEBUG(DEBUG_ERR, (__location__ " memory error\n"));
+			return -1;
+		}
+	}
+
+	if (ctdb_config.failover_disabled) {
+		ret = setenv("CTDB_DISABLE_IP_FAILOVER", "1", 1);
+		if (ret != 0) {
+			D_ERR("Failed to set CTDB_DISABLE_IP_FAILOVER variable\n");
+			return -1;
+		}
+	}
+
+	return helper_run(rec, rec, prog, arg, "takeover");
+}
+
+static bool do_takeover_run(struct ctdb_recoverd *rec,
+			    struct ctdb_node_map_old *nodemap)
+{
+	uint32_t *nodes = NULL;
+	struct ctdb_disable_message dtr;
+	TDB_DATA data;
+	size_t i;
+	uint32_t *rebalance_nodes = rec->force_rebalance_nodes;
+	int ret;
+	bool ok;
+
+	DEBUG(DEBUG_NOTICE, ("Takeover run starting\n"));
+
+	if (ctdb_op_is_in_progress(rec->takeover_run)) {
+		DEBUG(DEBUG_ERR, (__location__
+				  " takeover run already in progress \n"));
+		ok = false;
+		goto done;
+	}
+
+	if (!ctdb_op_begin(rec->takeover_run)) {
+		ok = false;
+		goto done;
+	}
+
+	/* Disable IP checks (takeover runs, really) on other nodes
+	 * while doing this takeover run.  This will stop those other
+	 * nodes from triggering takeover runs when think they should
+	 * be hosting an IP but it isn't yet on an interface.  Don't
+	 * wait for replies since a failure here might cause some
+	 * noise in the logs but will not actually cause a problem.
+	 */
+	ZERO_STRUCT(dtr);
+	dtr.srvid = 0; /* No reply */
+	dtr.pnn = -1;
+
+	data.dptr  = (uint8_t*)&dtr;
+	data.dsize = sizeof(dtr);
+
+	nodes = list_of_connected_nodes(rec->ctdb, nodemap, rec, false);
+
+	/* Disable for 60 seconds.  This can be a tunable later if
+	 * necessary.
+	 */
+	dtr.timeout = 60;
+	for (i = 0; i < talloc_array_length(nodes); i++) {
+		if (ctdb_client_send_message(rec->ctdb, nodes[i],
+					     CTDB_SRVID_DISABLE_TAKEOVER_RUNS,
+					     data) != 0) {
+			DEBUG(DEBUG_INFO,("Failed to disable takeover runs\n"));
+		}
+	}
+
+	ret = ctdb_takeover(rec, rec->force_rebalance_nodes);
+
+	/* Re-enable takeover runs and IP checks on other nodes */
+	dtr.timeout = 0;
+	for (i = 0; i < talloc_array_length(nodes); i++) {
+		if (ctdb_client_send_message(rec->ctdb, nodes[i],
+					     CTDB_SRVID_DISABLE_TAKEOVER_RUNS,
+					     data) != 0) {
+			DEBUG(DEBUG_INFO,("Failed to re-enable takeover runs\n"));
+		}
+	}
+
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR, ("ctdb_takeover_run() failed\n"));
+		ok = false;
+		goto done;
+	}
+
+	ok = true;
+	/* Takeover run was successful so clear force rebalance targets */
+	if (rebalance_nodes == rec->force_rebalance_nodes) {
+		TALLOC_FREE(rec->force_rebalance_nodes);
+	} else {
+		DEBUG(DEBUG_WARNING,
+		      ("Rebalance target nodes changed during takeover run - not clearing\n"));
+	}
+done:
+	rec->need_takeover_run = !ok;
+	talloc_free(nodes);
+	ctdb_op_end(rec->takeover_run);
+
+	DEBUG(DEBUG_NOTICE, ("Takeover run %s\n", ok ? "completed successfully" : "unsuccessful"));
+	return ok;
+}
+
+static int db_recovery_parallel(struct ctdb_recoverd *rec, TALLOC_CTX *mem_ctx)
+{
+	static char prog[PATH_MAX+1] = "";
+	const char *arg;
+
+	if (!ctdb_set_helper("recovery_helper", prog, sizeof(prog),
+			     "CTDB_RECOVERY_HELPER", CTDB_HELPER_BINDIR,
+			     "ctdb_recovery_helper")) {
+		ctdb_die(rec->ctdb, "Unable to set recovery helper\n");
+	}
+
+	arg = talloc_asprintf(mem_ctx, "%u", new_generation());
+	if (arg == NULL) {
+		DEBUG(DEBUG_ERR, (__location__ " memory error\n"));
+		return -1;
+	}
+
+	setenv("CTDB_DBDIR_STATE", rec->ctdb->db_directory_state, 1);
+
+	return helper_run(rec, mem_ctx, prog, arg, "recovery");
+}
+
+/*
+ * Main recovery function, only run by leader
+ */
+static int do_recovery(struct ctdb_recoverd *rec, TALLOC_CTX *mem_ctx)
+{
+	struct ctdb_context *ctdb = rec->ctdb;
+	struct ctdb_node_map_old *nodemap = rec->nodemap;
+	unsigned int i;
+	int ret;
+	bool self_ban;
+
+	DEBUG(DEBUG_NOTICE, (__location__ " Starting do_recovery\n"));
+
+	/* Check if the current node is still the leader.  It's possible that
+	 * re-election has changed the leader.
+	 */
+	if (!this_node_is_leader(rec)) {
+		D_NOTICE("Leader changed to %u, aborting recovery\n",
+			 rec->leader);
+		return -1;
+	}
+
+	/* if recovery fails, force it again */
+	rec->need_recovery = true;
+
+	if (!ctdb_op_begin(rec->recovery)) {
+		return -1;
+	}
+
+	if (rec->election_in_progress) {
+		/* an election is in progress */
+		DEBUG(DEBUG_ERR, ("do_recovery called while election in progress - try again later\n"));
+		goto fail;
+	}
+
+	ban_misbehaving_nodes(rec, &self_ban);
+	if (self_ban) {
+		DEBUG(DEBUG_NOTICE, ("This node was banned, aborting recovery\n"));
+		goto fail;
+	}
+
+	if (cluster_lock_enabled(rec) && !cluster_lock_held(rec)) {
+		/* Leader can change in ban_misbehaving_nodes() */
+		if (!this_node_is_leader(rec)) {
+			D_NOTICE("Leader changed to %u, aborting recovery\n",
+				 rec->leader);
+			rec->need_recovery = false;
+			goto fail;
+		}
+
+		D_ERR("Cluster lock not held - abort recovery, ban node\n");
+		ctdb_ban_node(rec, rec->pnn);
+		goto fail;
+	}
+
+	DEBUG(DEBUG_NOTICE, (__location__ " Recovery initiated due to problem with node %u\n", rec->last_culprit_node));
+
+	/* Retrieve capabilities from all connected nodes */
+	ret = update_capabilities(rec, nodemap);
+	if (ret!=0) {
+		DEBUG(DEBUG_ERR, (__location__ " Unable to update node capabilities.\n"));
+		return -1;
+	}
+
+	/*
+	  update all nodes to have the same flags that we have
+	 */
+	for (i=0;i<nodemap->num;i++) {
+		if (nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
+			continue;
+		}
+
+		ret = update_flags_on_all_nodes(rec,
+						nodemap->nodes[i].pnn,
+						nodemap->nodes[i].flags);
+		if (ret != 0) {
+			if (nodemap->nodes[i].flags & NODE_FLAGS_INACTIVE) {
+				DEBUG(DEBUG_WARNING, (__location__ "Unable to update flags on inactive node %d\n", i));
+			} else {
+				DEBUG(DEBUG_ERR, (__location__ " Unable to update flags on all nodes for node %d\n", i));
+				return -1;
+			}
+		}
+	}
+
+	DEBUG(DEBUG_NOTICE, (__location__ " Recovery - updated flags\n"));
+
+	ret = db_recovery_parallel(rec, mem_ctx);
+	if (ret != 0) {
+		goto fail;
+	}
+
+	do_takeover_run(rec, nodemap);
+
+	/* send a message to all clients telling them that the cluster 
+	   has been reconfigured */
+	ret = ctdb_client_send_message(ctdb, CTDB_BROADCAST_CONNECTED,
+				       CTDB_SRVID_RECONFIGURE, tdb_null);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR, (__location__ " Failed to send reconfigure message\n"));
+		goto fail;
+	}
+
+	DEBUG(DEBUG_NOTICE, (__location__ " Recovery complete\n"));
+
+	rec->need_recovery = false;
+	ctdb_op_end(rec->recovery);
+
+	/*
+	 * Completed a full recovery so forgive any past transgressions
+	 */
+	ban_counts_reset(rec);
+
+	/* We just finished a recovery successfully.
+	   We now wait for rerecovery_timeout before we allow
+	   another recovery to take place.
+	*/
+	DEBUG(DEBUG_NOTICE, ("Just finished a recovery. New recoveries will now be suppressed for the rerecovery timeout (%d seconds)\n", ctdb->tunable.rerecovery_timeout));
+	ctdb_op_disable(rec->recovery, ctdb->ev,
+			ctdb->tunable.rerecovery_timeout);
+	return 0;
+
+fail:
+	ctdb_op_end(rec->recovery);
+	return -1;
+}
+
+
+/*
+  elections are won by first checking the number of connected nodes, then
+  the priority time, then the pnn
+ */
+struct election_message {
+	uint32_t num_connected;
+	struct timeval priority_time;
+	uint32_t pnn;
+	uint32_t node_flags;
+};
+
+/*
+  form this nodes election data
+ */
+static void ctdb_election_data(struct ctdb_recoverd *rec, struct election_message *em)
+{
+	unsigned int i;
+	int ret;
+	struct ctdb_node_map_old *nodemap;
+	struct ctdb_context *ctdb = rec->ctdb;
+	bool ok;
+
+	ZERO_STRUCTP(em);
+
+	em->pnn = rec->pnn;
+	em->priority_time = rec->priority_time;
+
+	ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, rec, &nodemap);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR,(__location__ " unable to get node map\n"));
+		return;
+	}
+
+	ok = node_flags(rec, rec->pnn, &rec->node_flags);
+	if (!ok) {
+		DBG_ERR("Unable to get node flags for this node\n");
+		return;
+	}
+	em->node_flags = rec->node_flags;
+
+	for (i=0;i<nodemap->num;i++) {
+		if (!(nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED)) {
+			em->num_connected++;
+		}
+	}
+
+	if (!this_node_can_be_leader(rec)) {
+		/* Try to lose... */
+		em->num_connected = 0;
+		em->priority_time = timeval_current();
+	}
+
+	talloc_free(nodemap);
+}
+
+/*
+  see if the given election data wins
+ */
+static bool ctdb_election_win(struct ctdb_recoverd *rec, struct election_message *em)
+{
+	struct election_message myem;
+	int cmp = 0;
+
+	ctdb_election_data(rec, &myem);
+
+	if (!this_node_can_be_leader(rec)) {
+		return false;
+	}
+
+	/* Automatically win if other node is banned or stopped */
+	if (em->node_flags & NODE_FLAGS_INACTIVE) {
+		return true;
+	}
+
+	/* then the longest running node */
+	if (cmp == 0) {
+		cmp = timeval_compare(&em->priority_time, &myem.priority_time);
+	}
+
+	if (cmp == 0) {
+		cmp = (int)myem.pnn - (int)em->pnn;
+	}
+
+	return cmp > 0;
+}
+
+/*
+  send out an election request
+ */
+static int send_election_request(struct ctdb_recoverd *rec)
+{
+	TDB_DATA election_data;
+	struct election_message emsg;
+	uint64_t srvid;
+	struct ctdb_context *ctdb = rec->ctdb;
+
+	srvid = CTDB_SRVID_ELECTION;
+
+	ctdb_election_data(rec, &emsg);
+
+	election_data.dsize = sizeof(struct election_message);
+	election_data.dptr  = (unsigned char *)&emsg;
+
+
+	/* Assume this node will win the election, set leader accordingly */
+	rec->leader = rec->pnn;
+
+	/* send an election message to all active nodes */
+	DEBUG(DEBUG_INFO,(__location__ " Send election request to all active nodes\n"));
+	return ctdb_client_send_message(ctdb, CTDB_BROADCAST_ALL, srvid, election_data);
+}
+
+/*
+  we think we are winning the election - send a broadcast election request
+ */
+static void election_send_request(struct tevent_context *ev,
+				  struct tevent_timer *te,
+				  struct timeval t, void *p)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(p, struct ctdb_recoverd);
+	int ret;
+
+	ret = send_election_request(rec);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR,("Failed to send election request!\n"));
+	}
+
+	TALLOC_FREE(rec->send_election_te);
+}
+
+/*
+  handler for memory dumps
+*/
+static void mem_dump_handler(uint64_t srvid, TDB_DATA data, void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(
+		private_data, struct ctdb_recoverd);
+	struct ctdb_context *ctdb = rec->ctdb;
+	TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
+	TDB_DATA *dump;
+	int ret;
+	struct ctdb_srvid_message *rd;
+
+	if (data.dsize != sizeof(struct ctdb_srvid_message)) {
+		DEBUG(DEBUG_ERR, (__location__ " Wrong size of return address.\n"));
+		talloc_free(tmp_ctx);
+		return;
+	}
+	rd = (struct ctdb_srvid_message *)data.dptr;
+
+	dump = talloc_zero(tmp_ctx, TDB_DATA);
+	if (dump == NULL) {
+		DEBUG(DEBUG_ERR, (__location__ " Failed to allocate memory for memdump\n"));
+		talloc_free(tmp_ctx);
+		return;
+	}
+	ret = ctdb_dump_memory(ctdb, dump);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR, (__location__ " ctdb_dump_memory() failed\n"));
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	DBG_ERR("recovery daemon memory dump\n");
+
+	ret = ctdb_client_send_message(ctdb, rd->pnn, rd->srvid, *dump);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR,("Failed to send rd memdump reply message\n"));
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	talloc_free(tmp_ctx);
+}
+
+/*
+  handler for reload_nodes
+*/
+static void reload_nodes_handler(uint64_t srvid, TDB_DATA data,
+				 void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(
+		private_data, struct ctdb_recoverd);
+
+	DEBUG(DEBUG_ERR, (__location__ " Reload nodes file from recovery daemon\n"));
+
+	ctdb_load_nodes_file(rec->ctdb);
+}
+
+
+static void recd_node_rebalance_handler(uint64_t srvid, TDB_DATA data,
+					void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(
+		private_data, struct ctdb_recoverd);
+	struct ctdb_context *ctdb = rec->ctdb;
+	uint32_t pnn;
+	uint32_t *t;
+	int len;
+
+	if (!this_node_is_leader(rec)) {
+		return;
+	}
+
+	if (data.dsize != sizeof(uint32_t)) {
+		DEBUG(DEBUG_ERR,(__location__ " Incorrect size of node rebalance message. Was %zd but expected %zd bytes\n", data.dsize, sizeof(uint32_t)));
+		return;
+	}
+
+	pnn = *(uint32_t *)&data.dptr[0];
+
+	DEBUG(DEBUG_NOTICE,("Setting up rebalance of IPs to node %u\n", pnn));
+
+	/* Copy any existing list of nodes.  There's probably some
+	 * sort of realloc variant that will do this but we need to
+	 * make sure that freeing the old array also cancels the timer
+	 * event for the timeout... not sure if realloc will do that.
+	 */
+	len = (rec->force_rebalance_nodes != NULL) ?
+		talloc_array_length(rec->force_rebalance_nodes) :
+		0;
+
+	/* This allows duplicates to be added but they don't cause
+	 * harm.  A call to add a duplicate PNN arguably means that
+	 * the timeout should be reset, so this is the simplest
+	 * solution.
+	 */
+	t = talloc_zero_array(rec, uint32_t, len+1);
+	CTDB_NO_MEMORY_VOID(ctdb, t);
+	if (len > 0) {
+		memcpy(t, rec->force_rebalance_nodes, sizeof(uint32_t) * len);
+	}
+	t[len] = pnn;
+
+	talloc_free(rec->force_rebalance_nodes);
+
+	rec->force_rebalance_nodes = t;
+}
+
+
+
+static void srvid_disable_and_reply(struct ctdb_recoverd *rec,
+				    TDB_DATA data,
+				    struct ctdb_op_state *op_state)
+{
+	struct ctdb_context *ctdb = rec->ctdb;
+	struct ctdb_disable_message *r;
+	uint32_t timeout;
+	TDB_DATA result;
+	int32_t ret = 0;
+
+	/* Validate input data */
+	if (data.dsize != sizeof(struct ctdb_disable_message)) {
+		DEBUG(DEBUG_ERR,(__location__ " Wrong size for data :%lu "
+				 "expecting %lu\n", (long unsigned)data.dsize,
+				 (long unsigned)sizeof(struct ctdb_srvid_message)));
+		return;
+	}
+	if (data.dptr == NULL) {
+		DEBUG(DEBUG_ERR,(__location__ " No data received\n"));
+		return;
+	}
+
+	r = (struct ctdb_disable_message *)data.dptr;
+	timeout = r->timeout;
+
+	ret = ctdb_op_disable(op_state, ctdb->ev, timeout);
+	if (ret != 0) {
+		goto done;
+	}
+
+	/* Returning our PNN tells the caller that we succeeded */
+	ret = rec->pnn;
+done:
+	result.dsize = sizeof(int32_t);
+	result.dptr  = (uint8_t *)&ret;
+	srvid_request_reply(ctdb, (struct ctdb_srvid_message *)r, result);
+}
+
+static void disable_takeover_runs_handler(uint64_t srvid, TDB_DATA data,
+					  void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(
+		private_data, struct ctdb_recoverd);
+
+	srvid_disable_and_reply(rec, data, rec->takeover_run);
+}
+
+/* Backward compatibility for this SRVID */
+static void disable_ip_check_handler(uint64_t srvid, TDB_DATA data,
+				     void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(
+		private_data, struct ctdb_recoverd);
+	uint32_t timeout;
+
+	if (data.dsize != sizeof(uint32_t)) {
+		DEBUG(DEBUG_ERR,(__location__ " Wrong size for data :%lu "
+				 "expecting %lu\n", (long unsigned)data.dsize,
+				 (long unsigned)sizeof(uint32_t)));
+		return;
+	}
+	if (data.dptr == NULL) {
+		DEBUG(DEBUG_ERR,(__location__ " No data received\n"));
+		return;
+	}
+
+	timeout = *((uint32_t *)data.dptr);
+
+	ctdb_op_disable(rec->takeover_run, rec->ctdb->ev, timeout);
+}
+
+static void disable_recoveries_handler(uint64_t srvid, TDB_DATA data,
+				       void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(
+		private_data, struct ctdb_recoverd);
+
+	srvid_disable_and_reply(rec, data, rec->recovery);
+}
+
+/*
+  handler for ip reallocate, just add it to the list of requests and 
+  handle this later in the monitor_cluster loop so we do not recurse
+  with other requests to takeover_run()
+*/
+static void ip_reallocate_handler(uint64_t srvid, TDB_DATA data,
+				  void *private_data)
+{
+	struct ctdb_srvid_message *request;
+	struct ctdb_recoverd *rec = talloc_get_type(
+		private_data, struct ctdb_recoverd);
+
+	if (data.dsize != sizeof(struct ctdb_srvid_message)) {
+		DEBUG(DEBUG_ERR, (__location__ " Wrong size of return address.\n"));
+		return;
+	}
+
+	request = (struct ctdb_srvid_message *)data.dptr;
+
+	srvid_request_add(rec->ctdb, &rec->reallocate_requests, request);
+}
+
+static void process_ipreallocate_requests(struct ctdb_context *ctdb,
+					  struct ctdb_recoverd *rec)
+{
+	TDB_DATA result;
+	int32_t ret;
+	struct srvid_requests *current;
+
+	/* Only process requests that are currently pending.  More
+	 * might come in while the takeover run is in progress and
+	 * they will need to be processed later since they might
+	 * be in response flag changes.
+	 */
+	current = rec->reallocate_requests;
+	rec->reallocate_requests = NULL;
+
+	if (do_takeover_run(rec, rec->nodemap)) {
+		ret = rec->pnn;
+	} else {
+		ret = -1;
+	}
+
+	result.dsize = sizeof(int32_t);
+	result.dptr  = (uint8_t *)&ret;
+
+	srvid_requests_reply(ctdb, &current, result);
+}
+
+/*
+ * handler for assigning banning credits
+ */
+static void banning_handler(uint64_t srvid, TDB_DATA data, void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(
+		private_data, struct ctdb_recoverd);
+	uint32_t ban_pnn;
+
+	/* Ignore if we are not leader */
+	if (!this_node_is_leader(rec)) {
+		return;
+	}
+
+	if (data.dsize != sizeof(uint32_t)) {
+		DEBUG(DEBUG_ERR, (__location__ "invalid data size %zu\n",
+				  data.dsize));
+		return;
+	}
+
+	ban_pnn = *(uint32_t *)data.dptr;
+
+	ctdb_set_culprit_count(rec, ban_pnn, rec->nodemap->num);
+}
+
+/*
+ * Handler for leader elections
+ */
+static void election_handler(uint64_t srvid, TDB_DATA data, void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(
+		private_data, struct ctdb_recoverd);
+	struct ctdb_context *ctdb = rec->ctdb;
+	struct election_message *em = (struct election_message *)data.dptr;
+
+	/* Ignore election packets from ourself */
+	if (rec->pnn == em->pnn) {
+		return;
+	}
+
+	/* we got an election packet - update the timeout for the election */
+	talloc_free(rec->election_timeout);
+	rec->election_in_progress = true;
+	rec->election_timeout = tevent_add_timer(
+			ctdb->ev, ctdb,
+			fast_start ?
+				timeval_current_ofs(0, 500000) :
+				timeval_current_ofs(ctdb->tunable.election_timeout, 0),
+			ctdb_election_timeout, rec);
+
+	/* someone called an election. check their election data
+	   and if we disagree and we would rather be the elected node, 
+	   send a new election message to all other nodes
+	 */
+	if (ctdb_election_win(rec, em)) {
+		if (!rec->send_election_te) {
+			rec->send_election_te = tevent_add_timer(
+					ctdb->ev, rec,
+					timeval_current_ofs(0, 500000),
+					election_send_request, rec);
+		}
+		return;
+	}
+
+	/* we didn't win */
+	TALLOC_FREE(rec->send_election_te);
+
+	/* Release the cluster lock file */
+	if (cluster_lock_held(rec)) {
+		cluster_lock_release(rec);
+	}
+
+	/* Set leader to the winner of this round */
+	rec->leader = em->pnn;
+
+	return;
+}
+
+static void cluster_lock_election(struct ctdb_recoverd *rec)
+{
+	bool ok;
+
+	if (!this_node_can_be_leader(rec)) {
+		if (cluster_lock_held(rec)) {
+			cluster_lock_release(rec);
+		}
+		goto done;
+	}
+
+	/*
+	 * Don't need to unconditionally release the lock and then
+	 * attempt to retake it.  This provides stability.
+	 */
+	if (cluster_lock_held(rec)) {
+		goto done;
+	}
+
+	rec->leader = CTDB_UNKNOWN_PNN;
+
+	ok = cluster_lock_take(rec);
+	if (ok) {
+		rec->leader = rec->pnn;
+		D_WARNING("Took cluster lock, leader=%"PRIu32"\n", rec->leader);
+	}
+
+done:
+	rec->election_in_progress = false;
+}
+
+/*
+  force the start of the election process
+ */
+static void force_election(struct ctdb_recoverd *rec)
+{
+	int ret;
+	struct ctdb_context *ctdb = rec->ctdb;
+
+	D_ERR("Start election\n");
+
+	/* set all nodes to recovery mode to stop all internode traffic */
+	ret = set_recovery_mode(ctdb, rec, rec->nodemap, CTDB_RECOVERY_ACTIVE);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR, (__location__ " Unable to set recovery mode to active on cluster\n"));
+		return;
+	}
+
+	rec->election_in_progress = true;
+	/* Let other nodes know that an election is underway */
+	leader_broadcast_send(rec, CTDB_UNKNOWN_PNN);
+
+	if (cluster_lock_enabled(rec)) {
+		cluster_lock_election(rec);
+		return;
+	}
+
+	talloc_free(rec->election_timeout);
+	rec->election_timeout = tevent_add_timer(
+			ctdb->ev, ctdb,
+			fast_start ?
+				timeval_current_ofs(0, 500000) :
+				timeval_current_ofs(ctdb->tunable.election_timeout, 0),
+			ctdb_election_timeout, rec);
+
+	ret = send_election_request(rec);
+	if (ret!=0) {
+		DBG_ERR("Failed to initiate leader election\n");
+		return;
+	}
+
+	/* wait for a few seconds to collect all responses */
+	ctdb_wait_election(rec);
+}
+
+
+static void srvid_not_implemented(uint64_t srvid,
+				  TDB_DATA data,
+				  void *private_data)
+{
+	const char *s;
+
+	switch (srvid) {
+	case CTDB_SRVID_SET_NODE_FLAGS:
+		s = "CTDB_SRVID_SET_NODE_FLAGS";
+		break;
+	default:
+		s = "UNKNOWN";
+	}
+
+	D_WARNING("SRVID %s (0x%" PRIx64 ") is obsolete\n", s, srvid);
+}
+
+/*
+  handler for when we need to push out flag changes to all other nodes
+*/
+static void push_flags_handler(uint64_t srvid, TDB_DATA data,
+			       void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type(
+		private_data, struct ctdb_recoverd);
+	struct ctdb_context *ctdb = rec->ctdb;
+	int ret;
+	struct ctdb_node_flag_change *c = (struct ctdb_node_flag_change *)data.dptr;
+	struct ctdb_node_map_old *nodemap=NULL;
+	TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
+	uint32_t *nodes;
+
+	/* read the node flags from the leader */
+	ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), rec->leader,
+				   tmp_ctx, &nodemap);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR, (__location__ " Unable to get nodemap from node %u\n", c->pnn));
+		talloc_free(tmp_ctx);
+		return;
+	}
+	if (c->pnn >= nodemap->num) {
+		DBG_ERR("Nodemap from leader does not contain node %d\n",
+			c->pnn);
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	/* send the flags update to all connected nodes */
+	nodes = list_of_connected_nodes(ctdb, nodemap, tmp_ctx, true);
+
+	if (ctdb_client_async_control(ctdb, CTDB_CONTROL_MODIFY_FLAGS,
+				      nodes, 0, CONTROL_TIMEOUT(),
+				      false, data,
+				      NULL, NULL,
+				      NULL) != 0) {
+		DEBUG(DEBUG_ERR, (__location__ " ctdb_control to modify node flags failed\n"));
+
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	talloc_free(tmp_ctx);
+}
+
+static void leader_broadcast_timeout_handler(struct tevent_context *ev,
+					     struct tevent_timer *te,
+					     struct timeval current_time,
+					     void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type_abort(
+		private_data, struct ctdb_recoverd);
+
+	rec->leader_broadcast_timeout_te = NULL;
+
+	D_NOTICE("Leader broadcast timeout\n");
+
+	force_election(rec);
+}
+
+static void leader_broadcast_timeout_cancel(struct ctdb_recoverd *rec)
+{
+	TALLOC_FREE(rec->leader_broadcast_timeout_te);
+}
+
+static int leader_broadcast_timeout_start(struct ctdb_recoverd *rec)
+{
+	struct ctdb_context *ctdb = rec->ctdb;
+
+	/*
+	 * This should not be necessary.  However, there will be
+	 * interactions with election code here.  It will want to
+	 * cancel and restart the timer around potentially long
+	 * elections.
+	 */
+	leader_broadcast_timeout_cancel(rec);
+
+	rec->leader_broadcast_timeout_te =
+		tevent_add_timer(
+			ctdb->ev,
+			rec,
+			timeval_current_ofs(ctdb_config.leader_timeout, 0),
+			leader_broadcast_timeout_handler,
+			rec);
+	if (rec->leader_broadcast_timeout_te == NULL) {
+		D_ERR("Unable to start leader broadcast timeout\n");
+		return ENOMEM;
+	}
+
+	return 0;
+}
+
+static bool leader_broadcast_timeout_active(struct ctdb_recoverd *rec)
+{
+	return rec->leader_broadcast_timeout_te != NULL;
+}
+
+static void leader_handler(uint64_t srvid, TDB_DATA data, void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type_abort(
+		private_data, struct ctdb_recoverd);
+	uint32_t pnn;
+	size_t npull;
+	int ret;
+
+	ret = ctdb_uint32_pull(data.dptr, data.dsize, &pnn, &npull);
+	if (ret != 0) {
+		DBG_WARNING("Unable to parse leader broadcast, ret=%d\n", ret);
+		return;
+	}
+
+	leader_broadcast_timeout_cancel(rec);
+
+	if (pnn == rec->leader) {
+		goto done;
+	}
+
+	if (pnn == CTDB_UNKNOWN_PNN) {
+		bool was_election_in_progress = rec->election_in_progress;
+
+		/*
+		 * Leader broadcast timeout was cancelled above - stop
+		 * main loop from restarting it until election is
+		 * complete
+		 */
+		rec->election_in_progress = true;
+
+		/*
+		 * This is the only notification for a cluster lock
+		 * election, so handle it here...
+		 */
+		if (cluster_lock_enabled(rec) && !was_election_in_progress) {
+			cluster_lock_election(rec);
+		}
+
+		return;
+	}
+
+	D_NOTICE("Received leader broadcast, leader=%"PRIu32"\n", pnn);
+	rec->leader = pnn;
+
+done:
+	leader_broadcast_timeout_start(rec);
+}
+
+struct verify_recmode_normal_data {
+	uint32_t count;
+	enum monitor_result status;
+};
+
+static void verify_recmode_normal_callback(struct ctdb_client_control_state *state)
+{
+	struct verify_recmode_normal_data *rmdata = talloc_get_type(state->async.private_data, struct verify_recmode_normal_data);
+
+
+	/* one more node has responded with recmode data*/
+	rmdata->count--;
+
+	/* if we failed to get the recmode, then return an error and let
+	   the main loop try again.
+	*/
+	if (state->state != CTDB_CONTROL_DONE) {
+		if (rmdata->status == MONITOR_OK) {
+			rmdata->status = MONITOR_FAILED;
+		}
+		return;
+	}
+
+	/* if we got a response, then the recmode will be stored in the
+	   status field
+	*/
+	if (state->status != CTDB_RECOVERY_NORMAL) {
+		DEBUG(DEBUG_NOTICE, ("Node:%u was in recovery mode. Start recovery process\n", state->c->hdr.destnode));
+		rmdata->status = MONITOR_RECOVERY_NEEDED;
+	}
+
+	return;
+}
+
+
+/* verify that all nodes are in normal recovery mode */
+static enum monitor_result verify_recmode(struct ctdb_context *ctdb, struct ctdb_node_map_old *nodemap)
+{
+	struct verify_recmode_normal_data *rmdata;
+	TALLOC_CTX *mem_ctx = talloc_new(ctdb);
+	struct ctdb_client_control_state *state;
+	enum monitor_result status;
+	unsigned int j;
+
+	rmdata = talloc(mem_ctx, struct verify_recmode_normal_data);
+	CTDB_NO_MEMORY_FATAL(ctdb, rmdata);
+	rmdata->count  = 0;
+	rmdata->status = MONITOR_OK;
+
+	/* loop over all active nodes and send an async getrecmode call to 
+	   them*/
+	for (j=0; j<nodemap->num; j++) {
+		if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+			continue;
+		}
+		state = ctdb_ctrl_getrecmode_send(ctdb, mem_ctx, 
+					CONTROL_TIMEOUT(), 
+					nodemap->nodes[j].pnn);
+		if (state == NULL) {
+			/* we failed to send the control, treat this as 
+			   an error and try again next iteration
+			*/			
+			DEBUG(DEBUG_ERR,("Failed to call ctdb_ctrl_getrecmode_send during monitoring\n"));
+			talloc_free(mem_ctx);
+			return MONITOR_FAILED;
+		}
+
+		/* set up the callback functions */
+		state->async.fn = verify_recmode_normal_callback;
+		state->async.private_data = rmdata;
+
+		/* one more control to wait for to complete */
+		rmdata->count++;
+	}
+
+
+	/* now wait for up to the maximum number of seconds allowed
+	   or until all nodes we expect a response from has replied
+	*/
+	while (rmdata->count > 0) {
+		tevent_loop_once(ctdb->ev);
+	}
+
+	status = rmdata->status;
+	talloc_free(mem_ctx);
+	return status;
+}
+
+
+static bool interfaces_have_changed(struct ctdb_context *ctdb,
+				    struct ctdb_recoverd *rec)
+{
+	struct ctdb_iface_list_old *ifaces = NULL;
+	TALLOC_CTX *mem_ctx;
+	bool ret = false;
+
+	mem_ctx = talloc_new(NULL);
+
+	/* Read the interfaces from the local node */
+	if (ctdb_ctrl_get_ifaces(ctdb, CONTROL_TIMEOUT(),
+				 CTDB_CURRENT_NODE, mem_ctx, &ifaces) != 0) {
+		D_ERR("Unable to get interfaces from local node %u\n", rec->pnn);
+		/* We could return an error.  However, this will be
+		 * rare so we'll decide that the interfaces have
+		 * actually changed, just in case.
+		 */
+		talloc_free(mem_ctx);
+		return true;
+	}
+
+	if (!rec->ifaces) {
+		/* We haven't been here before so things have changed */
+		DEBUG(DEBUG_NOTICE, ("Initial interface fetched\n"));
+		ret = true;
+	} else if (rec->ifaces->num != ifaces->num) {
+		/* Number of interfaces has changed */
+		DEBUG(DEBUG_NOTICE, ("Interface count changed from %d to %d\n",
+				     rec->ifaces->num, ifaces->num));
+		ret = true;
+	} else {
+		/* See if interface names or link states have changed */
+		unsigned int i;
+		for (i = 0; i < rec->ifaces->num; i++) {
+			struct ctdb_iface * iface = &rec->ifaces->ifaces[i];
+			if (strcmp(iface->name, ifaces->ifaces[i].name) != 0) {
+				DEBUG(DEBUG_NOTICE,
+				      ("Interface in slot %d changed: %s => %s\n",
+				       i, iface->name, ifaces->ifaces[i].name));
+				ret = true;
+				break;
+			}
+			if (iface->link_state != ifaces->ifaces[i].link_state) {
+				DEBUG(DEBUG_NOTICE,
+				      ("Interface %s changed state: %d => %d\n",
+				       iface->name, iface->link_state,
+				       ifaces->ifaces[i].link_state));
+				ret = true;
+				break;
+			}
+		}
+	}
+
+	talloc_free(rec->ifaces);
+	rec->ifaces = talloc_steal(rec, ifaces);
+
+	talloc_free(mem_ctx);
+	return ret;
+}
+
+/* Check that the local allocation of public IP addresses is correct
+ * and do some house-keeping */
+static int verify_local_ip_allocation(struct ctdb_recoverd *rec)
+{
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+	struct ctdb_context *ctdb = rec->ctdb;
+	unsigned int j;
+	int ret;
+	bool need_takeover_run = false;
+	struct ctdb_public_ip_list_old *ips = NULL;
+
+	/* If we are not the leader then do some housekeeping */
+	if (!this_node_is_leader(rec)) {
+		/* Ignore any IP reallocate requests - only leader
+		 * processes them
+		 */
+		TALLOC_FREE(rec->reallocate_requests);
+		/* Clear any nodes that should be force rebalanced in
+		 * the next takeover run.  If the leader has changed
+		 * then we don't want to process these some time in
+		 * the future.
+		 */
+		TALLOC_FREE(rec->force_rebalance_nodes);
+	}
+
+	/* Return early if disabled... */
+	if (ctdb_config.failover_disabled ||
+	    ctdb_op_is_disabled(rec->takeover_run)) {
+		talloc_free(mem_ctx);
+		return  0;
+	}
+
+	if (interfaces_have_changed(ctdb, rec)) {
+		need_takeover_run = true;
+	}
+
+	/* If there are unhosted IPs but this node can host them then
+	 * trigger an IP reallocation */
+
+	/* Read *available* IPs from local node */
+	ret = ctdb_ctrl_get_public_ips_flags(
+		ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, mem_ctx,
+		CTDB_PUBLIC_IP_FLAGS_ONLY_AVAILABLE, &ips);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR, ("Unable to retrieve available public IPs\n"));
+		talloc_free(mem_ctx);
+		return -1;
+	}
+
+	for (j=0; j<ips->num; j++) {
+		if (ips->ips[j].pnn == CTDB_UNKNOWN_PNN &&
+		    rec->nodemap->nodes[rec->pnn].flags == 0) {
+			DEBUG(DEBUG_WARNING,
+			      ("Unassigned IP %s can be served by this node\n",
+			       ctdb_addr_to_str(&ips->ips[j].addr)));
+			need_takeover_run = true;
+		}
+	}
+
+	talloc_free(ips);
+
+	if (!ctdb->do_checkpublicip) {
+		goto done;
+	}
+
+	/* Validate the IP addresses that this node has on network
+	 * interfaces.  If there is an inconsistency between reality
+	 * and the state expected by CTDB then try to fix it by
+	 * triggering an IP reallocation or releasing extraneous IP
+	 * addresses. */
+
+	/* Read *known* IPs from local node */
+	ret = ctdb_ctrl_get_public_ips_flags(
+		ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, mem_ctx, 0, &ips);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR, ("Unable to retrieve known public IPs\n"));
+		talloc_free(mem_ctx);
+		return -1;
+	}
+
+	for (j=0; j<ips->num; j++) {
+		if (ips->ips[j].pnn == rec->pnn) {
+			if (!ctdb_sys_have_ip(&ips->ips[j].addr)) {
+				DEBUG(DEBUG_ERR,
+				      ("Assigned IP %s not on an interface\n",
+				       ctdb_addr_to_str(&ips->ips[j].addr)));
+				need_takeover_run = true;
+			}
+		} else {
+			if (ctdb_sys_have_ip(&ips->ips[j].addr)) {
+				DEBUG(DEBUG_ERR,
+				      ("IP %s incorrectly on an interface\n",
+				       ctdb_addr_to_str(&ips->ips[j].addr)));
+				need_takeover_run = true;
+			}
+		}
+	}
+
+done:
+	if (need_takeover_run) {
+		struct ctdb_srvid_message rd;
+		TDB_DATA data;
+
+		DEBUG(DEBUG_NOTICE,("Trigger takeoverrun\n"));
+
+		ZERO_STRUCT(rd);
+		rd.pnn = rec->pnn;
+		rd.srvid = 0;
+		data.dptr = (uint8_t *)&rd;
+		data.dsize = sizeof(rd);
+
+		ret = ctdb_client_send_message(ctdb,
+					       CTDB_BROADCAST_CONNECTED,
+					       CTDB_SRVID_TAKEOVER_RUN,
+					       data);
+		if (ret != 0) {
+			D_ERR("Failed to send takeover run request\n");
+		}
+	}
+	talloc_free(mem_ctx);
+	return 0;
+}
+
+
+struct remote_nodemaps_state {
+	struct ctdb_node_map_old **remote_nodemaps;
+	struct ctdb_recoverd *rec;
+};
+
+static void async_getnodemap_callback(struct ctdb_context *ctdb,
+				      uint32_t node_pnn,
+				      int32_t res,
+				      TDB_DATA outdata,
+				      void *callback_data)
+{
+	struct remote_nodemaps_state *state =
+		(struct remote_nodemaps_state *)callback_data;
+	struct ctdb_node_map_old **remote_nodemaps = state->remote_nodemaps;
+	struct ctdb_node_map_old *nodemap = state->rec->nodemap;
+	size_t i;
+
+	for (i = 0; i < nodemap->num; i++) {
+		if (nodemap->nodes[i].pnn == node_pnn) {
+			break;
+		}
+	}
+
+	if (i >= nodemap->num) {
+		DBG_ERR("Invalid PNN %"PRIu32"\n", node_pnn);
+		return;
+	}
+
+	remote_nodemaps[i] = (struct ctdb_node_map_old *)talloc_steal(
+					remote_nodemaps, outdata.dptr);
+
+}
+
+static void async_getnodemap_error(struct ctdb_context *ctdb,
+				   uint32_t node_pnn,
+				   int32_t res,
+				   TDB_DATA outdata,
+				   void *callback_data)
+{
+	struct remote_nodemaps_state *state =
+		(struct remote_nodemaps_state *)callback_data;
+	struct ctdb_recoverd *rec = state->rec;
+
+	DBG_ERR("Failed to retrieve nodemap from node %u\n", node_pnn);
+	ctdb_set_culprit(rec, node_pnn);
+}
+
+static int get_remote_nodemaps(struct ctdb_recoverd *rec,
+			       TALLOC_CTX *mem_ctx,
+			       struct ctdb_node_map_old ***remote_nodemaps)
+{
+	struct ctdb_context *ctdb = rec->ctdb;
+	struct ctdb_node_map_old **t;
+	uint32_t *nodes;
+	struct remote_nodemaps_state state;
+	int ret;
+
+	t = talloc_zero_array(mem_ctx,
+			      struct ctdb_node_map_old *,
+			      rec->nodemap->num);
+	if (t == NULL) {
+		DBG_ERR("Memory allocation error\n");
+		return -1;
+	}
+
+	nodes = list_of_connected_nodes(ctdb, rec->nodemap, mem_ctx, false);
+
+	state.remote_nodemaps = t;
+	state.rec = rec;
+
+	ret = ctdb_client_async_control(ctdb,
+					CTDB_CONTROL_GET_NODEMAP,
+					nodes,
+					0,
+					CONTROL_TIMEOUT(),
+					false,
+					tdb_null,
+					async_getnodemap_callback,
+					async_getnodemap_error,
+					&state);
+	talloc_free(nodes);
+
+	if (ret != 0) {
+		talloc_free(t);
+		return ret;
+	}
+
+	*remote_nodemaps = t;
+	return 0;
+}
+
+static void main_loop(struct ctdb_context *ctdb, struct ctdb_recoverd *rec,
+		      TALLOC_CTX *mem_ctx)
+{
+	struct ctdb_node_map_old *nodemap=NULL;
+	struct ctdb_node_map_old **remote_nodemaps=NULL;
+	struct ctdb_vnn_map *vnnmap=NULL;
+	struct ctdb_vnn_map *remote_vnnmap=NULL;
+	uint32_t num_lmasters;
+	int32_t debug_level;
+	unsigned int i, j;
+	int ret;
+	bool self_ban;
+
+
+	/* verify that the main daemon is still running */
+	if (ctdb_kill(ctdb, ctdb->ctdbd_pid, 0) != 0) {
+		DEBUG(DEBUG_CRIT,("CTDB daemon is no longer available. Shutting down recovery daemon\n"));
+		exit(-1);
+	}
+
+	/* ping the local daemon to tell it we are alive */
+	ctdb_ctrl_recd_ping(ctdb);
+
+	if (rec->election_in_progress) {
+		/* an election is in progress */
+		return;
+	}
+
+	/*
+	 * Start leader broadcasts if they are not active (1st time
+	 * through main loop?  Memory allocation error?)
+	 */
+	if (!leader_broadcast_loop_active(rec)) {
+		ret = leader_broadcast_loop(rec);
+		if (ret != 0) {
+			D_ERR("Failed to set up leader broadcast\n");
+			ctdb_set_culprit(rec, rec->pnn);
+		}
+	}
+	/*
+	 * Similar for leader broadcast timeouts.  These can also have
+	 * been stopped by another node receiving a leader broadcast
+	 * timeout and transmitting an "unknown leader broadcast".
+	 * Note that this should never be done during an election - at
+	 * the moment there is nothing between here and the above
+	 * election-in-progress check that can process an election
+	 * result (i.e. no event loop).
+	 */
+	if (!leader_broadcast_timeout_active(rec)) {
+		ret = leader_broadcast_timeout_start(rec);
+		if (ret != 0) {
+			ctdb_set_culprit(rec, rec->pnn);
+		}
+	}
+
+
+	/* read the debug level from the parent and update locally */
+	ret = ctdb_ctrl_get_debuglevel(ctdb, CTDB_CURRENT_NODE, &debug_level);
+	if (ret !=0) {
+		DEBUG(DEBUG_ERR, (__location__ " Failed to read debuglevel from parent\n"));
+		return;
+	}
+	debuglevel_set(debug_level);
+
+	/* get relevant tunables */
+	ret = ctdb_ctrl_get_all_tunables(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, &ctdb->tunable);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR,("Failed to get tunables - retrying\n"));
+		return;
+	}
+
+	/* get runstate */
+	ret = ctdb_ctrl_get_runstate(ctdb, CONTROL_TIMEOUT(),
+				     CTDB_CURRENT_NODE, &ctdb->runstate);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR, ("Failed to get runstate - retrying\n"));
+		return;
+	}
+
+	/* get nodemap */
+	ret = ctdb_ctrl_getnodemap(ctdb,
+				   CONTROL_TIMEOUT(),
+				   rec->pnn,
+				   rec,
+				   &nodemap);
+	if (ret != 0) {
+		DBG_ERR("Unable to get nodemap from node %"PRIu32"\n", rec->pnn);
+		return;
+	}
+	talloc_free(rec->nodemap);
+	rec->nodemap = nodemap;
+
+	/* remember our own node flags */
+	rec->node_flags = nodemap->nodes[rec->pnn].flags;
+
+	ban_misbehaving_nodes(rec, &self_ban);
+	if (self_ban) {
+		DEBUG(DEBUG_NOTICE, ("This node was banned, restart main_loop\n"));
+		return;
+	}
+
+	ret = ctdb_ctrl_getrecmode(ctdb, mem_ctx, CONTROL_TIMEOUT(),
+				   CTDB_CURRENT_NODE, &ctdb->recovery_mode);
+	if (ret != 0) {
+		D_ERR("Failed to read recmode from local node\n");
+		return;
+	}
+
+	/* if the local daemon is STOPPED or BANNED, we verify that the databases are
+	   also frozen and that the recmode is set to active.
+	*/
+	if (rec->node_flags & NODE_FLAGS_INACTIVE) {
+		/* If this node has become inactive then we want to
+		 * reduce the chances of it taking over the leader
+		 * role when it becomes active again.  This
+		 * helps to stabilise the leader role so that
+		 * it stays on the most stable node.
+		 */
+		rec->priority_time = timeval_current();
+
+		if (ctdb->recovery_mode == CTDB_RECOVERY_NORMAL) {
+			DEBUG(DEBUG_ERR,("Node is stopped or banned but recovery mode is not active. Activate recovery mode and lock databases\n"));
+
+			ret = ctdb_ctrl_setrecmode(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, CTDB_RECOVERY_ACTIVE);
+			if (ret != 0) {
+				DEBUG(DEBUG_ERR,(__location__ " Failed to activate recovery mode in STOPPED or BANNED state\n"));
+
+				return;
+			}
+		}
+		if (! rec->frozen_on_inactive) {
+			ret = ctdb_ctrl_freeze(ctdb, CONTROL_TIMEOUT(),
+					       CTDB_CURRENT_NODE);
+			if (ret != 0) {
+				DEBUG(DEBUG_ERR,
+				      (__location__ " Failed to freeze node "
+				       "in STOPPED or BANNED state\n"));
+				return;
+			}
+
+			rec->frozen_on_inactive = true;
+		}
+
+		/* If this node is stopped or banned then it is not the recovery
+		 * master, so don't do anything. This prevents stopped or banned
+		 * node from starting election and sending unnecessary controls.
+		 */
+		return;
+	}
+
+	rec->frozen_on_inactive = false;
+
+	/* Retrieve capabilities from all connected nodes */
+	ret = update_capabilities(rec, nodemap);
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR, (__location__ " Unable to update node capabilities.\n"));
+		return;
+	}
+
+	if (ctdb->recovery_mode == CTDB_RECOVERY_NORMAL) {
+		/* Check if an IP takeover run is needed and trigger one if
+		 * necessary */
+		verify_local_ip_allocation(rec);
+	}
+
+	/* If this node is not the leader then skip recovery checks */
+	if (!this_node_is_leader(rec)) {
+		return;
+	}
+
+
+	/* Get the nodemaps for all connected remote nodes */
+	ret = get_remote_nodemaps(rec, mem_ctx, &remote_nodemaps);
+	if (ret != 0) {
+		DBG_ERR("Failed to read remote nodemaps\n");
+		return;
+	}
+
+	/* Ensure our local and remote flags are correct */
+	ret = update_flags(rec, nodemap, remote_nodemaps);
+	if (ret != 0) {
+		D_ERR("Unable to update flags\n");
+		return;
+	}
+
+	if (ctdb->num_nodes != nodemap->num) {
+		DEBUG(DEBUG_ERR, (__location__ " ctdb->num_nodes (%d) != nodemap->num (%d) reloading nodes file\n", ctdb->num_nodes, nodemap->num));
+		ctdb_load_nodes_file(ctdb);
+		return;
+	}
+
+	/* get the vnnmap */
+	ret = ctdb_ctrl_getvnnmap(ctdb,
+				  CONTROL_TIMEOUT(),
+				  rec->pnn,
+				  mem_ctx,
+				  &vnnmap);
+	if (ret != 0) {
+		DBG_ERR("Unable to get vnnmap from node %u\n", rec->pnn);
+		return;
+	}
+
+	if (rec->need_recovery) {
+		/* a previous recovery didn't finish */
+		do_recovery(rec, mem_ctx);
+		return;
+	}
+
+	/* verify that all active nodes are in normal mode 
+	   and not in recovery mode 
+	*/
+	switch (verify_recmode(ctdb, nodemap)) {
+	case MONITOR_RECOVERY_NEEDED:
+		do_recovery(rec, mem_ctx);
+		return;
+	case MONITOR_FAILED:
+		return;
+	case MONITOR_ELECTION_NEEDED:
+		/* can not happen */
+	case MONITOR_OK:
+		break;
+	}
+
+	if (cluster_lock_enabled(rec)) {
+		/* We must already hold the cluster lock */
+		if (!cluster_lock_held(rec)) {
+			D_ERR("Failed cluster lock sanity check\n");
+			ctdb_set_culprit(rec, rec->pnn);
+			do_recovery(rec, mem_ctx);
+			return;
+		}
+	}
+
+
+	/* If recoveries are disabled then there is no use doing any
+	 * nodemap or flags checks.  Recoveries might be disabled due
+	 * to "reloadnodes", so doing these checks might cause an
+	 * unnecessary recovery.  */
+	if (ctdb_op_is_disabled(rec->recovery)) {
+		goto takeover_run_checks;
+	}
+
+	/* verify that all other nodes have the same nodemap as we have
+	*/
+	for (j=0; j<nodemap->num; j++) {
+		if (nodemap->nodes[j].pnn == rec->pnn) {
+			continue;
+		}
+		if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+			continue;
+		}
+
+ 		/* if the nodes disagree on how many nodes there are
+		   then this is a good reason to try recovery
+		 */
+		if (remote_nodemaps[j]->num != nodemap->num) {
+			DEBUG(DEBUG_ERR, (__location__ " Remote node:%u has different node count. %u vs %u of the local node\n",
+				  nodemap->nodes[j].pnn, remote_nodemaps[j]->num, nodemap->num));
+			ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
+			do_recovery(rec, mem_ctx);
+			return;
+		}
+
+		/* if the nodes disagree on which nodes exist and are
+		   active, then that is also a good reason to do recovery
+		 */
+		for (i=0;i<nodemap->num;i++) {
+			if (remote_nodemaps[j]->nodes[i].pnn != nodemap->nodes[i].pnn) {
+				DEBUG(DEBUG_ERR, (__location__ " Remote node:%u has different nodemap pnn for %d (%u vs %u).\n", 
+					  nodemap->nodes[j].pnn, i, 
+					  remote_nodemaps[j]->nodes[i].pnn, nodemap->nodes[i].pnn));
+				ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
+				do_recovery(rec, mem_ctx);
+				return;
+			}
+		}
+	}
+
+	/* count how many active nodes there are */
+	num_lmasters  = 0;
+	for (i=0; i<nodemap->num; i++) {
+		if (!(nodemap->nodes[i].flags & NODE_FLAGS_INACTIVE)) {
+			if (ctdb_node_has_capabilities(rec->caps,
+						       ctdb->nodes[i]->pnn,
+						       CTDB_CAP_LMASTER)) {
+				num_lmasters++;
+			}
+		}
+	}
+
+
+	/* There must be the same number of lmasters in the vnn map as
+	 * there are active nodes with the lmaster capability...  or
+	 * do a recovery.
+	 */
+	if (vnnmap->size != num_lmasters) {
+		DEBUG(DEBUG_ERR, (__location__ " The vnnmap count is different from the number of active lmaster nodes: %u vs %u\n",
+			  vnnmap->size, num_lmasters));
+		ctdb_set_culprit(rec, rec->pnn);
+		do_recovery(rec, mem_ctx);
+		return;
+	}
+
+	/*
+	 * Verify that all active lmaster nodes in the nodemap also
+	 * exist in the vnnmap
+	 */
+	for (j=0; j<nodemap->num; j++) {
+		if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+			continue;
+		}
+		if (! ctdb_node_has_capabilities(rec->caps,
+						 nodemap->nodes[j].pnn,
+						 CTDB_CAP_LMASTER)) {
+			continue;
+		}
+		if (nodemap->nodes[j].pnn == rec->pnn) {
+			continue;
+		}
+
+		for (i=0; i<vnnmap->size; i++) {
+			if (vnnmap->map[i] == nodemap->nodes[j].pnn) {
+				break;
+			}
+		}
+		if (i == vnnmap->size) {
+			D_ERR("Active LMASTER node %u is not in the vnnmap\n",
+			      nodemap->nodes[j].pnn);
+			ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
+			do_recovery(rec, mem_ctx);
+			return;
+		}
+	}
+
+	
+	/* verify that all other nodes have the same vnnmap
+	   and are from the same generation
+	 */
+	for (j=0; j<nodemap->num; j++) {
+		if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+			continue;
+		}
+		if (nodemap->nodes[j].pnn == rec->pnn) {
+			continue;
+		}
+
+		ret = ctdb_ctrl_getvnnmap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].pnn, 
+					  mem_ctx, &remote_vnnmap);
+		if (ret != 0) {
+			DEBUG(DEBUG_ERR, (__location__ " Unable to get vnnmap from remote node %u\n", 
+				  nodemap->nodes[j].pnn));
+			return;
+		}
+
+		/* verify the vnnmap generation is the same */
+		if (vnnmap->generation != remote_vnnmap->generation) {
+			DEBUG(DEBUG_ERR, (__location__ " Remote node %u has different generation of vnnmap. %u vs %u (ours)\n", 
+				  nodemap->nodes[j].pnn, remote_vnnmap->generation, vnnmap->generation));
+			ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
+			do_recovery(rec, mem_ctx);
+			return;
+		}
+
+		/* verify the vnnmap size is the same */
+		if (vnnmap->size != remote_vnnmap->size) {
+			DEBUG(DEBUG_ERR, (__location__ " Remote node %u has different size of vnnmap. %u vs %u (ours)\n", 
+				  nodemap->nodes[j].pnn, remote_vnnmap->size, vnnmap->size));
+			ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
+			do_recovery(rec, mem_ctx);
+			return;
+		}
+
+		/* verify the vnnmap is the same */
+		for (i=0;i<vnnmap->size;i++) {
+			if (remote_vnnmap->map[i] != vnnmap->map[i]) {
+				DEBUG(DEBUG_ERR, (__location__ " Remote node %u has different vnnmap.\n", 
+					  nodemap->nodes[j].pnn));
+				ctdb_set_culprit(rec, nodemap->nodes[j].pnn);
+				do_recovery(rec, mem_ctx);
+				return;
+			}
+		}
+	}
+
+	/* FIXME: Add remote public IP checking to ensure that nodes
+	 * have the IP addresses that are allocated to them. */
+
+takeover_run_checks:
+
+	/* If there are IP takeover runs requested or the previous one
+	 * failed then perform one and notify the waiters */
+	if (!ctdb_op_is_disabled(rec->takeover_run) &&
+	    (rec->reallocate_requests || rec->need_takeover_run)) {
+		process_ipreallocate_requests(ctdb, rec);
+	}
+}
+
+static void recd_sig_term_handler(struct tevent_context *ev,
+				  struct tevent_signal *se, int signum,
+				  int count, void *dont_care,
+				  void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type_abort(
+		private_data, struct ctdb_recoverd);
+
+	DEBUG(DEBUG_ERR, ("Received SIGTERM, exiting\n"));
+	cluster_lock_release(rec);
+	exit(0);
+}
+
+/*
+ * Periodically log elements of the cluster state
+ *
+ * This can be used to confirm a split brain has occurred
+ */
+static void maybe_log_cluster_state(struct tevent_context *ev,
+				    struct tevent_timer *te,
+				    struct timeval current_time,
+				    void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type_abort(
+		private_data, struct ctdb_recoverd);
+	struct ctdb_context *ctdb = rec->ctdb;
+	struct tevent_timer *tt;
+
+	static struct timeval start_incomplete = {
+		.tv_sec = 0,
+	};
+
+	bool is_complete;
+	bool was_complete;
+	unsigned int i;
+	double seconds;
+	unsigned int minutes;
+	unsigned int num_connected;
+
+	if (!this_node_is_leader(rec)) {
+		goto done;
+	}
+
+	if (rec->nodemap == NULL) {
+		goto done;
+	}
+
+	is_complete = true;
+	num_connected = 0;
+	for (i = 0; i < rec->nodemap->num; i++) {
+		struct ctdb_node_and_flags *n = &rec->nodemap->nodes[i];
+
+		if (n->pnn == rec->pnn) {
+			continue;
+		}
+		if ((n->flags & NODE_FLAGS_DELETED) != 0) {
+			continue;
+		}
+		if ((n->flags & NODE_FLAGS_DISCONNECTED) != 0) {
+			is_complete = false;
+			continue;
+		}
+
+		num_connected++;
+	}
+
+	was_complete = timeval_is_zero(&start_incomplete);
+
+	if (is_complete) {
+		if (! was_complete) {
+			D_WARNING("Cluster complete with leader=%u\n",
+				  rec->leader);
+			start_incomplete = timeval_zero();
+		}
+		goto done;
+	}
+
+	/* Cluster is newly incomplete... */
+	if (was_complete) {
+		start_incomplete = current_time;
+		minutes = 0;
+		goto log;
+	}
+
+	/*
+	 * Cluster has been incomplete since previous check, so figure
+	 * out how long (in minutes) and decide whether to log anything
+	 */
+	seconds = timeval_elapsed2(&start_incomplete, &current_time);
+	minutes = (unsigned int)seconds / 60;
+	if (minutes >= 60) {
+		/* Over an hour, log every hour */
+		if (minutes % 60 != 0) {
+			goto done;
+		}
+	} else if (minutes >= 10) {
+		/* Over 10 minutes, log every 10 minutes */
+		if (minutes % 10 != 0) {
+			goto done;
+		}
+	}
+
+log:
+	D_WARNING("Cluster incomplete with leader=%u, elapsed=%u minutes, "
+		  "connected=%u\n",
+		  rec->leader,
+		  minutes,
+		  num_connected);
+
+done:
+	tt = tevent_add_timer(ctdb->ev,
+			      rec,
+			      timeval_current_ofs(60, 0),
+			      maybe_log_cluster_state,
+			      rec);
+	if (tt == NULL) {
+		DBG_WARNING("Failed to set up cluster state timer\n");
+	}
+}
+
+static void recd_sighup_hook(void *private_data)
+{
+	struct ctdb_recoverd *rec = talloc_get_type_abort(
+		private_data, struct ctdb_recoverd);
+
+	if (rec->helper_pid > 0) {
+		kill(rec->helper_pid, SIGHUP);
+	}
+}
+
+/*
+  the main monitoring loop
+ */
+static void monitor_cluster(struct ctdb_context *ctdb)
+{
+	struct tevent_signal *se;
+	struct ctdb_recoverd *rec;
+	bool status;
+
+	DEBUG(DEBUG_NOTICE,("monitor_cluster starting\n"));
+
+	rec = talloc_zero(ctdb, struct ctdb_recoverd);
+	CTDB_NO_MEMORY_FATAL(ctdb, rec);
+
+	rec->ctdb = ctdb;
+	rec->leader = CTDB_UNKNOWN_PNN;
+	rec->pnn = ctdb_get_pnn(ctdb);
+	rec->cluster_lock_handle = NULL;
+	rec->helper_pid = -1;
+
+	rec->takeover_run = ctdb_op_init(rec, "takeover runs");
+	CTDB_NO_MEMORY_FATAL(ctdb, rec->takeover_run);
+
+	rec->recovery = ctdb_op_init(rec, "recoveries");
+	CTDB_NO_MEMORY_FATAL(ctdb, rec->recovery);
+
+	rec->priority_time = timeval_current();
+	rec->frozen_on_inactive = false;
+
+	status = logging_setup_sighup_handler(rec->ctdb->ev,
+					      rec,
+					      recd_sighup_hook,
+					      rec);
+	if (!status) {
+		D_ERR("Failed to install SIGHUP handler\n");
+		exit(1);
+	}
+
+	se = tevent_add_signal(ctdb->ev, ctdb, SIGTERM, 0,
+			       recd_sig_term_handler, rec);
+	if (se == NULL) {
+		DEBUG(DEBUG_ERR, ("Failed to install SIGTERM handler\n"));
+		exit(1);
+	}
+
+	if (!cluster_lock_enabled(rec)) {
+		struct tevent_timer *tt;
+
+		tt = tevent_add_timer(ctdb->ev,
+				      rec,
+				      timeval_current_ofs(60, 0),
+				      maybe_log_cluster_state,
+				      rec);
+		if (tt == NULL) {
+			DBG_WARNING("Failed to set up cluster state timer\n");
+		}
+	}
+
+	/* register a message port for sending memory dumps */
+	ctdb_client_set_message_handler(ctdb, CTDB_SRVID_MEM_DUMP, mem_dump_handler, rec);
+
+	/* when a node is assigned banning credits */
+	ctdb_client_set_message_handler(ctdb, CTDB_SRVID_BANNING,
+					banning_handler, rec);
+
+	/* register a message port for recovery elections */
+	ctdb_client_set_message_handler(ctdb, CTDB_SRVID_ELECTION, election_handler, rec);
+
+	ctdb_client_set_message_handler(ctdb,
+					CTDB_SRVID_SET_NODE_FLAGS,
+					srvid_not_implemented,
+					rec);
+
+	/* when we are asked to puch out a flag change */
+	ctdb_client_set_message_handler(ctdb, CTDB_SRVID_PUSH_NODE_FLAGS, push_flags_handler, rec);
+
+	/* register a message port for reloadnodes  */
+	ctdb_client_set_message_handler(ctdb, CTDB_SRVID_RELOAD_NODES, reload_nodes_handler, rec);
+
+	/* register a message port for performing a takeover run */
+	ctdb_client_set_message_handler(ctdb, CTDB_SRVID_TAKEOVER_RUN, ip_reallocate_handler, rec);
+
+	/* register a message port for disabling the ip check for a short while */
+	ctdb_client_set_message_handler(ctdb, CTDB_SRVID_DISABLE_IP_CHECK, disable_ip_check_handler, rec);
+
+	/* register a message port for forcing a rebalance of a node next
+	   reallocation */
+	ctdb_client_set_message_handler(ctdb, CTDB_SRVID_REBALANCE_NODE, recd_node_rebalance_handler, rec);
+
+	/* Register a message port for disabling takeover runs */
+	ctdb_client_set_message_handler(ctdb,
+					CTDB_SRVID_DISABLE_TAKEOVER_RUNS,
+					disable_takeover_runs_handler, rec);
+
+	/* Register a message port for disabling recoveries */
+	ctdb_client_set_message_handler(ctdb,
+					CTDB_SRVID_DISABLE_RECOVERIES,
+					disable_recoveries_handler, rec);
+
+	ctdb_client_set_message_handler(ctdb,
+					CTDB_SRVID_LEADER,
+					leader_handler,
+					rec);
+
+	for (;;) {
+		TALLOC_CTX *mem_ctx = talloc_new(ctdb);
+		struct timeval start;
+		double elapsed;
+
+		if (!mem_ctx) {
+			DEBUG(DEBUG_CRIT,(__location__
+					  " Failed to create temp context\n"));
+			exit(-1);
+		}
+
+		start = timeval_current();
+		main_loop(ctdb, rec, mem_ctx);
+		talloc_free(mem_ctx);
+
+		/* we only check for recovery once every second */
+		elapsed = timeval_elapsed(&start);
+		if (elapsed < ctdb->tunable.recover_interval) {
+			ctdb_wait_timeout(ctdb, ctdb->tunable.recover_interval
+					  - elapsed);
+		}
+	}
+}
+
+/*
+  event handler for when the main ctdbd dies
+ */
+static void ctdb_recoverd_parent(struct tevent_context *ev,
+				 struct tevent_fd *fde,
+				 uint16_t flags, void *private_data)
+{
+	DEBUG(DEBUG_ALERT,("recovery daemon parent died - exiting\n"));
+	_exit(1);
+}
+
+/*
+  called regularly to verify that the recovery daemon is still running
+ */
+static void ctdb_check_recd(struct tevent_context *ev,
+			    struct tevent_timer *te,
+			    struct timeval yt, void *p)
+{
+	struct ctdb_context *ctdb = talloc_get_type(p, struct ctdb_context);
+
+	if (ctdb_kill(ctdb, ctdb->recoverd_pid, 0) != 0) {
+		DEBUG(DEBUG_ERR,("Recovery daemon (pid:%d) is no longer running. Trying to restart recovery daemon.\n", (int)ctdb->recoverd_pid));
+
+		tevent_add_timer(ctdb->ev, ctdb, timeval_zero(),
+				 ctdb_restart_recd, ctdb);
+
+		return;
+	}
+
+	tevent_add_timer(ctdb->ev, ctdb->recd_ctx,
+			 timeval_current_ofs(30, 0),
+			 ctdb_check_recd, ctdb);
+}
+
+static void recd_sig_child_handler(struct tevent_context *ev,
+				   struct tevent_signal *se, int signum,
+				   int count, void *dont_care,
+				   void *private_data)
+{
+//	struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
+	int status;
+	pid_t pid = -1;
+
+	while (pid != 0) {
+		pid = waitpid(-1, &status, WNOHANG);
+		if (pid == -1) {
+			if (errno != ECHILD) {
+				DEBUG(DEBUG_ERR, (__location__ " waitpid() returned error. errno:%s(%d)\n", strerror(errno),errno));
+			}
+			return;
+		}
+		if (pid > 0) {
+			DEBUG(DEBUG_DEBUG, ("RECD SIGCHLD from %d\n", (int)pid));
+		}
+	}
+}
+
+/*
+  startup the recovery daemon as a child of the main ctdb daemon
+ */
+int ctdb_start_recoverd(struct ctdb_context *ctdb)
+{
+	int fd[2];
+	struct tevent_signal *se;
+	struct tevent_fd *fde;
+	int ret;
+
+	if (pipe(fd) != 0) {
+		return -1;
+	}
+
+	ctdb->recoverd_pid = ctdb_fork(ctdb);
+	if (ctdb->recoverd_pid == -1) {
+		return -1;
+	}
+
+	if (ctdb->recoverd_pid != 0) {
+		talloc_free(ctdb->recd_ctx);
+		ctdb->recd_ctx = talloc_new(ctdb);
+		CTDB_NO_MEMORY(ctdb, ctdb->recd_ctx);
+
+		close(fd[0]);
+		tevent_add_timer(ctdb->ev, ctdb->recd_ctx,
+				 timeval_current_ofs(30, 0),
+				 ctdb_check_recd, ctdb);
+		return 0;
+	}
+
+	close(fd[1]);
+
+	srandom(getpid() ^ time(NULL));
+
+	ret = logging_init(ctdb, NULL, NULL, "ctdb-recoverd");
+	if (ret != 0) {
+		return -1;
+	}
+
+	prctl_set_comment("ctdb_recoverd");
+	if (switch_from_server_to_client(ctdb) != 0) {
+		DEBUG(DEBUG_CRIT, (__location__ "ERROR: failed to switch recovery daemon into client mode. shutting down.\n"));
+		exit(1);
+	}
+
+	DEBUG(DEBUG_DEBUG, (__location__ " Created PIPE FD:%d to recovery daemon\n", fd[0]));
+
+	fde = tevent_add_fd(ctdb->ev, ctdb, fd[0], TEVENT_FD_READ,
+			    ctdb_recoverd_parent, &fd[0]);
+	tevent_fd_set_auto_close(fde);
+
+	/* set up a handler to pick up sigchld */
+	se = tevent_add_signal(ctdb->ev, ctdb, SIGCHLD, 0,
+			       recd_sig_child_handler, ctdb);
+	if (se == NULL) {
+		DEBUG(DEBUG_CRIT,("Failed to set up signal handler for SIGCHLD in recovery daemon\n"));
+		exit(1);
+	}
+
+	monitor_cluster(ctdb);
+
+	DEBUG(DEBUG_ALERT,("ERROR: ctdb_recoverd finished!?\n"));
+	return -1;
+}
+
+/*
+  shutdown the recovery daemon
+ */
+void ctdb_stop_recoverd(struct ctdb_context *ctdb)
+{
+	if (ctdb->recoverd_pid == 0) {
+		return;
+	}
+
+	DEBUG(DEBUG_NOTICE,("Shutting down recovery daemon\n"));
+	ctdb_kill(ctdb, ctdb->recoverd_pid, SIGTERM);
+
+	TALLOC_FREE(ctdb->recd_ctx);
+	TALLOC_FREE(ctdb->recd_ping_count);
+}
+
+static void ctdb_restart_recd(struct tevent_context *ev,
+			      struct tevent_timer *te,
+			      struct timeval t, void *private_data)
+{
+	struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
+
+	DEBUG(DEBUG_ERR,("Restarting recovery daemon\n"));
+	ctdb_stop_recoverd(ctdb);
+	ctdb_start_recoverd(ctdb);
+}