Merge branch 'master' of ctdb into 'master' of samba

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>

1 files changed, 1396 insertions, 0 deletions

diff --git a/ctdb/server/ctdb_recover.c b/ctdb/server/ctdb_recover.c
new file mode 100644
index 0000000000..1cbcc59abe
--- /dev/null
+++ b/ctdb/server/ctdb_recover.c
@@ -0,0 +1,1396 @@
+/* 
+   ctdb recovery code
+
+   Copyright (C) Andrew Tridgell  2007
+   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 "includes.h"
+#include "tdb.h"
+#include "system/time.h"
+#include "system/network.h"
+#include "system/filesys.h"
+#include "system/wait.h"
+#include "../include/ctdb_private.h"
+#include "lib/util/dlinklist.h"
+#include "db_wrap.h"
+
+
+int 
+ctdb_control_getvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
+{
+	CHECK_CONTROL_DATA_SIZE(0);
+	struct ctdb_vnn_map_wire *map;
+	size_t len;
+
+	len = offsetof(struct ctdb_vnn_map_wire, map) + sizeof(uint32_t)*ctdb->vnn_map->size;
+	map = talloc_size(outdata, len);
+	CTDB_NO_MEMORY(ctdb, map);
+
+	map->generation = ctdb->vnn_map->generation;
+	map->size = ctdb->vnn_map->size;
+	memcpy(map->map, ctdb->vnn_map->map, sizeof(uint32_t)*map->size);
+
+	outdata->dsize = len;
+	outdata->dptr  = (uint8_t *)map;
+
+	return 0;
+}
+
+int 
+ctdb_control_setvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
+{
+	struct ctdb_vnn_map_wire *map = (struct ctdb_vnn_map_wire *)indata.dptr;
+	int i;
+
+	for(i=1; i<=NUM_DB_PRIORITIES; i++) {
+		if (ctdb->freeze_mode[i] != CTDB_FREEZE_FROZEN) {
+			DEBUG(DEBUG_ERR,("Attempt to set vnnmap when not frozen\n"));
+			return -1;
+		}
+	}
+
+	talloc_free(ctdb->vnn_map);
+
+	ctdb->vnn_map = talloc(ctdb, struct ctdb_vnn_map);
+	CTDB_NO_MEMORY(ctdb, ctdb->vnn_map);
+
+	ctdb->vnn_map->generation = map->generation;
+	ctdb->vnn_map->size       = map->size;
+	ctdb->vnn_map->map = talloc_array(ctdb->vnn_map, uint32_t, map->size);
+	CTDB_NO_MEMORY(ctdb, ctdb->vnn_map->map);
+
+	memcpy(ctdb->vnn_map->map, map->map, sizeof(uint32_t)*map->size);
+
+	return 0;
+}
+
+int 
+ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
+{
+	uint32_t i, len;
+	struct ctdb_db_context *ctdb_db;
+	struct ctdb_dbid_map *dbid_map;
+
+	CHECK_CONTROL_DATA_SIZE(0);
+
+	len = 0;
+	for(ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next){
+		len++;
+	}
+
+
+	outdata->dsize = offsetof(struct ctdb_dbid_map, dbs) + sizeof(dbid_map->dbs[0])*len;
+	outdata->dptr  = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
+	if (!outdata->dptr) {
+		DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate dbmap array\n"));
+		exit(1);
+	}
+
+	dbid_map = (struct ctdb_dbid_map *)outdata->dptr;
+	dbid_map->num = len;
+	for (i=0,ctdb_db=ctdb->db_list;ctdb_db;i++,ctdb_db=ctdb_db->next){
+		dbid_map->dbs[i].dbid       = ctdb_db->db_id;
+		if (ctdb_db->persistent != 0) {
+			dbid_map->dbs[i].flags |= CTDB_DB_FLAGS_PERSISTENT;
+		}
+		if (ctdb_db->readonly != 0) {
+			dbid_map->dbs[i].flags |= CTDB_DB_FLAGS_READONLY;
+		}
+		if (ctdb_db->sticky != 0) {
+			dbid_map->dbs[i].flags |= CTDB_DB_FLAGS_STICKY;
+		}
+	}
+
+	return 0;
+}
+
+int 
+ctdb_control_getnodemap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
+{
+	uint32_t i, num_nodes;
+	struct ctdb_node_map *node_map;
+
+	CHECK_CONTROL_DATA_SIZE(0);
+
+	num_nodes = ctdb->num_nodes;
+
+	outdata->dsize = offsetof(struct ctdb_node_map, nodes) + num_nodes*sizeof(struct ctdb_node_and_flags);
+	outdata->dptr  = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
+	if (!outdata->dptr) {
+		DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate nodemap array\n"));
+		exit(1);
+	}
+
+	node_map = (struct ctdb_node_map *)outdata->dptr;
+	node_map->num = num_nodes;
+	for (i=0; i<num_nodes; i++) {
+		if (parse_ip(ctdb->nodes[i]->address.address,
+			     NULL, /* TODO: pass in the correct interface here*/
+			     0,
+			     &node_map->nodes[i].addr) == 0)
+		{
+			DEBUG(DEBUG_ERR, (__location__ " Failed to parse %s into a sockaddr\n", ctdb->nodes[i]->address.address));
+		}
+
+		node_map->nodes[i].pnn   = ctdb->nodes[i]->pnn;
+		node_map->nodes[i].flags = ctdb->nodes[i]->flags;
+	}
+
+	return 0;
+}
+
+/*
+   get an old style ipv4-only nodemap
+*/
+int 
+ctdb_control_getnodemapv4(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
+{
+	uint32_t i, num_nodes;
+	struct ctdb_node_mapv4 *node_map;
+
+	CHECK_CONTROL_DATA_SIZE(0);
+
+	num_nodes = ctdb->num_nodes;
+
+	outdata->dsize = offsetof(struct ctdb_node_mapv4, nodes) + num_nodes*sizeof(struct ctdb_node_and_flagsv4);
+	outdata->dptr  = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
+	if (!outdata->dptr) {
+		DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate nodemap array\n"));
+		exit(1);
+	}
+
+	node_map = (struct ctdb_node_mapv4 *)outdata->dptr;
+	node_map->num = num_nodes;
+	for (i=0; i<num_nodes; i++) {
+		if (parse_ipv4(ctdb->nodes[i]->address.address, 0, &node_map->nodes[i].sin) == 0) {
+			DEBUG(DEBUG_ERR, (__location__ " Failed to parse %s into a sockaddr\n", ctdb->nodes[i]->address.address));
+			return -1;
+		}
+
+		node_map->nodes[i].pnn   = ctdb->nodes[i]->pnn;
+		node_map->nodes[i].flags = ctdb->nodes[i]->flags;
+	}
+
+	return 0;
+}
+
+static void
+ctdb_reload_nodes_event(struct event_context *ev, struct timed_event *te, 
+			       struct timeval t, void *private_data)
+{
+	int i, num_nodes;
+	struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
+	TALLOC_CTX *tmp_ctx;
+	struct ctdb_node **nodes;	
+
+	tmp_ctx = talloc_new(ctdb);
+
+	/* steal the old nodes file for a while */
+	talloc_steal(tmp_ctx, ctdb->nodes);
+	nodes = ctdb->nodes;
+	ctdb->nodes = NULL;
+	num_nodes = ctdb->num_nodes;
+	ctdb->num_nodes = 0;
+
+	/* load the new nodes file */
+	ctdb_load_nodes_file(ctdb);
+
+	for (i=0; i<ctdb->num_nodes; i++) {
+		/* keep any identical pre-existing nodes and connections */
+		if ((i < num_nodes) && ctdb_same_address(&ctdb->nodes[i]->address, &nodes[i]->address)) {
+			talloc_free(ctdb->nodes[i]);
+			ctdb->nodes[i] = talloc_steal(ctdb->nodes, nodes[i]);
+			continue;
+		}
+
+		if (ctdb->nodes[i]->flags & NODE_FLAGS_DELETED) {
+			continue;
+		}
+
+		/* any new or different nodes must be added */
+		if (ctdb->methods->add_node(ctdb->nodes[i]) != 0) {
+			DEBUG(DEBUG_CRIT, (__location__ " methods->add_node failed at %d\n", i));
+			ctdb_fatal(ctdb, "failed to add node. shutting down\n");
+		}
+		if (ctdb->methods->connect_node(ctdb->nodes[i]) != 0) {
+			DEBUG(DEBUG_CRIT, (__location__ " methods->add_connect failed at %d\n", i));
+			ctdb_fatal(ctdb, "failed to connect to node. shutting down\n");
+		}
+	}
+
+	/* tell the recovery daemon to reaload the nodes file too */
+	ctdb_daemon_send_message(ctdb, ctdb->pnn, CTDB_SRVID_RELOAD_NODES, tdb_null);
+
+	talloc_free(tmp_ctx);
+	return;
+}
+
+/*
+  reload the nodes file after a short delay (so that we can send the response
+  back first
+*/
+int 
+ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode)
+{
+	event_add_timed(ctdb->ev, ctdb, timeval_current_ofs(1,0), ctdb_reload_nodes_event, ctdb);
+
+	return 0;
+}
+
+/* 
+   a traverse function for pulling all relevent records from pulldb
+ */
+struct pulldb_data {
+	struct ctdb_context *ctdb;
+	struct ctdb_db_context *ctdb_db;
+	struct ctdb_marshall_buffer *pulldata;
+	uint32_t len;
+	uint32_t allocated_len;
+	bool failed;
+};
+
+static int traverse_pulldb(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
+{
+	struct pulldb_data *params = (struct pulldb_data *)p;
+	struct ctdb_rec_data *rec;
+	struct ctdb_context *ctdb = params->ctdb;
+	struct ctdb_db_context *ctdb_db = params->ctdb_db;
+
+	/* add the record to the blob */
+	rec = ctdb_marshall_record(params->pulldata, 0, key, NULL, data);
+	if (rec == NULL) {
+		params->failed = true;
+		return -1;
+	}
+	if (params->len + rec->length >= params->allocated_len) {
+		params->allocated_len = rec->length + params->len + ctdb->tunable.pulldb_preallocation_size;
+		params->pulldata = talloc_realloc_size(NULL, params->pulldata, params->allocated_len);
+	}
+	if (params->pulldata == NULL) {
+		DEBUG(DEBUG_CRIT,(__location__ " Failed to expand pulldb_data to %u\n", rec->length + params->len));
+		ctdb_fatal(params->ctdb, "failed to allocate memory for recovery. shutting down\n");
+	}
+	params->pulldata->count++;
+	memcpy(params->len+(uint8_t *)params->pulldata, rec, rec->length);
+	params->len += rec->length;
+
+	if (ctdb->tunable.db_record_size_warn != 0 && rec->length > ctdb->tunable.db_record_size_warn) {
+		DEBUG(DEBUG_ERR,("Data record in %s is big. Record size is %d bytes\n", ctdb_db->db_name, (int)rec->length));
+	}
+
+	talloc_free(rec);
+
+	return 0;
+}
+
+/*
+  pull a bunch of records from a ltdb, filtering by lmaster
+ */
+int32_t ctdb_control_pull_db(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
+{
+	struct ctdb_control_pulldb *pull;
+	struct ctdb_db_context *ctdb_db;
+	struct pulldb_data params;
+	struct ctdb_marshall_buffer *reply;
+
+	pull = (struct ctdb_control_pulldb *)indata.dptr;
+	
+	ctdb_db = find_ctdb_db(ctdb, pull->db_id);
+	if (!ctdb_db) {
+		DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", pull->db_id));
+		return -1;
+	}
+
+	if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
+		DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_pull_db when not frozen\n"));
+		return -1;
+	}
+
+	reply = talloc_zero(outdata, struct ctdb_marshall_buffer);
+	CTDB_NO_MEMORY(ctdb, reply);
+
+	reply->db_id = pull->db_id;
+
+	params.ctdb = ctdb;
+	params.ctdb_db = ctdb_db;
+	params.pulldata = reply;
+	params.len = offsetof(struct ctdb_marshall_buffer, data);
+	params.allocated_len = params.len;
+	params.failed = false;
+
+	if (ctdb_db->unhealthy_reason) {
+		/* this is just a warning, as the tdb should be empty anyway */
+		DEBUG(DEBUG_WARNING,("db(%s) unhealty in ctdb_control_pull_db: %s\n",
+				     ctdb_db->db_name, ctdb_db->unhealthy_reason));
+	}
+
+	if (ctdb_lockall_mark_prio(ctdb, ctdb_db->priority) != 0) {
+		DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
+		return -1;
+	}
+
+	if (tdb_traverse_read(ctdb_db->ltdb->tdb, traverse_pulldb, &params) == -1) {
+		DEBUG(DEBUG_ERR,(__location__ " Failed to get traverse db '%s'\n", ctdb_db->db_name));
+		ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
+		talloc_free(params.pulldata);
+		return -1;
+	}
+
+	ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
+
+	outdata->dptr = (uint8_t *)params.pulldata;
+	outdata->dsize = params.len;
+
+	if (ctdb->tunable.db_record_count_warn != 0 && params.pulldata->count > ctdb->tunable.db_record_count_warn) {
+		DEBUG(DEBUG_ERR,("Database %s is big. Contains %d records\n", ctdb_db->db_name, params.pulldata->count));
+	}
+	if (ctdb->tunable.db_size_warn != 0 && outdata->dsize > ctdb->tunable.db_size_warn) {
+		DEBUG(DEBUG_ERR,("Database %s is big. Contains %d bytes\n", ctdb_db->db_name, (int)outdata->dsize));
+	}
+
+
+	return 0;
+}
+
+/*
+  push a bunch of records into a ltdb, filtering by rsn
+ */
+int32_t ctdb_control_push_db(struct ctdb_context *ctdb, TDB_DATA indata)
+{
+	struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
+	struct ctdb_db_context *ctdb_db;
+	int i, ret;
+	struct ctdb_rec_data *rec;
+
+	if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
+		DEBUG(DEBUG_ERR,(__location__ " invalid data in pulldb reply\n"));
+		return -1;
+	}
+
+	ctdb_db = find_ctdb_db(ctdb, reply->db_id);
+	if (!ctdb_db) {
+		DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
+		return -1;
+	}
+
+	if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
+		DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_push_db when not frozen\n"));
+		return -1;
+	}
+
+	if (ctdb_lockall_mark_prio(ctdb, ctdb_db->priority) != 0) {
+		DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
+		return -1;
+	}
+
+	rec = (struct ctdb_rec_data *)&reply->data[0];
+
+	DEBUG(DEBUG_INFO,("starting push of %u records for dbid 0x%x\n",
+		 reply->count, reply->db_id));
+
+	for (i=0;i<reply->count;i++) {
+		TDB_DATA key, data;
+		struct ctdb_ltdb_header *hdr;
+
+		key.dptr = &rec->data[0];
+		key.dsize = rec->keylen;
+		data.dptr = &rec->data[key.dsize];
+		data.dsize = rec->datalen;
+
+		if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
+			DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record\n"));
+			goto failed;
+		}
+		hdr = (struct ctdb_ltdb_header *)data.dptr;
+		/* strip off any read only record flags. All readonly records
+		   are revoked implicitely by a recovery
+		*/
+		hdr->flags &= ~CTDB_REC_RO_FLAGS;
+
+		data.dptr += sizeof(*hdr);
+		data.dsize -= sizeof(*hdr);
+
+		ret = ctdb_ltdb_store(ctdb_db, key, hdr, data);
+		if (ret != 0) {
+			DEBUG(DEBUG_CRIT, (__location__ " Unable to store record\n"));
+			goto failed;
+		}
+
+		rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
+	}	    
+
+	DEBUG(DEBUG_DEBUG,("finished push of %u records for dbid 0x%x\n",
+		 reply->count, reply->db_id));
+
+	if (ctdb_db->readonly) {
+		DEBUG(DEBUG_CRIT,("Clearing the tracking database for dbid 0x%x\n",
+				  ctdb_db->db_id));
+		if (tdb_wipe_all(ctdb_db->rottdb) != 0) {
+			DEBUG(DEBUG_ERR,("Failed to wipe tracking database for 0x%x. Dropping read-only delegation support\n", ctdb_db->db_id));
+			ctdb_db->readonly = false;
+			tdb_close(ctdb_db->rottdb);
+			ctdb_db->rottdb = NULL;
+			ctdb_db->readonly = false;
+		}
+		while (ctdb_db->revokechild_active != NULL) {
+			talloc_free(ctdb_db->revokechild_active);
+		}
+	}
+
+	ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
+	return 0;
+
+failed:
+	ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
+	return -1;
+}
+
+struct ctdb_set_recmode_state {
+	struct ctdb_context *ctdb;
+	struct ctdb_req_control *c;
+	uint32_t recmode;
+	int fd[2];
+	struct timed_event *te;
+	struct fd_event *fde;
+	pid_t child;
+	struct timeval start_time;
+};
+
+/*
+  called if our set_recmode child times out. this would happen if
+  ctdb_recovery_lock() would block.
+ */
+static void ctdb_set_recmode_timeout(struct event_context *ev, struct timed_event *te, 
+					 struct timeval t, void *private_data)
+{
+	struct ctdb_set_recmode_state *state = talloc_get_type(private_data, 
+					   struct ctdb_set_recmode_state);
+
+	/* we consider this a success, not a failure, as we failed to
+	   set the recovery lock which is what we wanted.  This can be
+	   caused by the cluster filesystem being very slow to
+	   arbitrate locks immediately after a node failure.	   
+	 */
+	DEBUG(DEBUG_ERR,(__location__ " set_recmode child process hung/timedout CFS slow to grant locks? (allowing recmode set anyway)\n"));
+	state->ctdb->recovery_mode = state->recmode;
+	ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
+	talloc_free(state);
+}
+
+
+/* when we free the recmode state we must kill any child process.
+*/
+static int set_recmode_destructor(struct ctdb_set_recmode_state *state)
+{
+	double l = timeval_elapsed(&state->start_time);
+
+	CTDB_UPDATE_RECLOCK_LATENCY(state->ctdb, "daemon reclock", reclock.ctdbd, l);
+
+	if (state->fd[0] != -1) {
+		state->fd[0] = -1;
+	}
+	if (state->fd[1] != -1) {
+		state->fd[1] = -1;
+	}
+	ctdb_kill(state->ctdb, state->child, SIGKILL);
+	return 0;
+}
+
+/* this is called when the client process has completed ctdb_recovery_lock()
+   and has written data back to us through the pipe.
+*/
+static void set_recmode_handler(struct event_context *ev, struct fd_event *fde, 
+			     uint16_t flags, void *private_data)
+{
+	struct ctdb_set_recmode_state *state= talloc_get_type(private_data, 
+					     struct ctdb_set_recmode_state);
+	char c = 0;
+	int ret;
+
+	/* we got a response from our child process so we can abort the
+	   timeout.
+	*/
+	talloc_free(state->te);
+	state->te = NULL;
+
+
+	/* read the childs status when trying to lock the reclock file.
+	   child wrote 0 if everything is fine and 1 if it did manage
+	   to lock the file, which would be a problem since that means
+	   we got a request to exit from recovery but we could still lock
+	   the file   which at this time SHOULD be locked by the recovery
+	   daemon on the recmaster
+	*/		
+	ret = read(state->fd[0], &c, 1);
+	if (ret != 1 || c != 0) {
+		ctdb_request_control_reply(state->ctdb, state->c, NULL, -1, "managed to lock reclock file from inside daemon");
+		talloc_free(state);
+		return;
+	}
+
+	state->ctdb->recovery_mode = state->recmode;
+
+	/* release any deferred attach calls from clients */
+	if (state->recmode == CTDB_RECOVERY_NORMAL) {
+		ctdb_process_deferred_attach(state->ctdb);
+	}
+
+	ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
+	talloc_free(state);
+	return;
+}
+
+static void
+ctdb_drop_all_ips_event(struct event_context *ev, struct timed_event *te, 
+			       struct timeval t, void *private_data)
+{
+	struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
+
+	DEBUG(DEBUG_ERR,(__location__ " Been in recovery mode for too long. Dropping all IPS\n"));
+	talloc_free(ctdb->release_ips_ctx);
+	ctdb->release_ips_ctx = NULL;
+
+	ctdb_release_all_ips(ctdb);
+}
+
+/*
+ * Set up an event to drop all public ips if we remain in recovery for too
+ * long
+ */
+int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb)
+{
+	if (ctdb->release_ips_ctx != NULL) {
+		talloc_free(ctdb->release_ips_ctx);
+	}
+	ctdb->release_ips_ctx = talloc_new(ctdb);
+	CTDB_NO_MEMORY(ctdb, ctdb->release_ips_ctx);
+
+	event_add_timed(ctdb->ev, ctdb->release_ips_ctx, timeval_current_ofs(ctdb->tunable.recovery_drop_all_ips, 0), ctdb_drop_all_ips_event, ctdb);
+	return 0;
+}
+
+/*
+  set the recovery mode
+ */
+int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb, 
+				 struct ctdb_req_control *c,
+				 TDB_DATA indata, bool *async_reply,
+				 const char **errormsg)
+{
+	uint32_t recmode = *(uint32_t *)indata.dptr;
+	int i, ret;
+	struct ctdb_set_recmode_state *state;
+	pid_t parent = getpid();
+
+	/* if we enter recovery but stay in recovery for too long
+	   we will eventually drop all our ip addresses
+	*/
+	if (recmode == CTDB_RECOVERY_NORMAL) {
+		talloc_free(ctdb->release_ips_ctx);
+		ctdb->release_ips_ctx = NULL;
+	} else {
+		if (ctdb_deferred_drop_all_ips(ctdb) != 0) {
+			DEBUG(DEBUG_ERR,("Failed to set up deferred drop all ips\n"));
+		}
+	}
+
+	if (recmode != ctdb->recovery_mode) {
+		DEBUG(DEBUG_NOTICE,(__location__ " Recovery mode set to %s\n", 
+			 recmode==CTDB_RECOVERY_NORMAL?"NORMAL":"ACTIVE"));
+	}
+
+	if (recmode != CTDB_RECOVERY_NORMAL ||
+	    ctdb->recovery_mode != CTDB_RECOVERY_ACTIVE) {
+		ctdb->recovery_mode = recmode;
+		return 0;
+	}
+
+	/* some special handling when ending recovery mode */
+
+	/* force the databases to thaw */
+	for (i=1; i<=NUM_DB_PRIORITIES; i++) {
+		if (ctdb->freeze_handles[i] != NULL) {
+			ctdb_control_thaw(ctdb, i);
+		}
+	}
+
+	state = talloc(ctdb, struct ctdb_set_recmode_state);
+	CTDB_NO_MEMORY(ctdb, state);
+
+	state->start_time = timeval_current();
+	state->fd[0] = -1;
+	state->fd[1] = -1;
+
+	/* release any deferred attach calls from clients */
+	if (recmode == CTDB_RECOVERY_NORMAL) {
+		ctdb_process_deferred_attach(ctdb);
+	}
+
+	if (ctdb->tunable.verify_recovery_lock == 0) {
+		/* dont need to verify the reclock file */
+		ctdb->recovery_mode = recmode;
+		return 0;
+	}
+
+	/* For the rest of what needs to be done, we need to do this in
+	   a child process since 
+	   1, the call to ctdb_recovery_lock() can block if the cluster
+	      filesystem is in the process of recovery.
+	*/
+	ret = pipe(state->fd);
+	if (ret != 0) {
+		talloc_free(state);
+		DEBUG(DEBUG_CRIT,(__location__ " Failed to open pipe for set_recmode child\n"));
+		return -1;
+	}
+
+	state->child = ctdb_fork(ctdb);
+	if (state->child == (pid_t)-1) {
+		close(state->fd[0]);
+		close(state->fd[1]);
+		talloc_free(state);
+		return -1;
+	}
+
+	if (state->child == 0) {
+		char cc = 0;
+		close(state->fd[0]);
+
+		ctdb_set_process_name("ctdb_recmode");
+		debug_extra = talloc_asprintf(NULL, "set_recmode:");
+		/* we should not be able to get the lock on the reclock file, 
+		  as it should  be held by the recovery master 
+		*/
+		if (ctdb_recovery_lock(ctdb, false)) {
+			DEBUG(DEBUG_CRIT,("ERROR: recovery lock file %s not locked when recovering!\n", ctdb->recovery_lock_file));
+			cc = 1;
+		}
+
+		write(state->fd[1], &cc, 1);
+		/* make sure we die when our parent dies */
+		while (ctdb_kill(ctdb, parent, 0) == 0 || errno != ESRCH) {
+			sleep(5);
+			write(state->fd[1], &cc, 1);
+		}
+		_exit(0);
+	}
+	close(state->fd[1]);
+	set_close_on_exec(state->fd[0]);
+
+	state->fd[1] = -1;
+
+	talloc_set_destructor(state, set_recmode_destructor);
+
+	DEBUG(DEBUG_DEBUG, (__location__ " Created PIPE FD:%d for setrecmode\n", state->fd[0]));
+
+	state->te = event_add_timed(ctdb->ev, state, timeval_current_ofs(5, 0),
+				    ctdb_set_recmode_timeout, state);
+
+	state->fde = event_add_fd(ctdb->ev, state, state->fd[0],
+				EVENT_FD_READ,
+				set_recmode_handler,
+				(void *)state);
+
+	if (state->fde == NULL) {
+		talloc_free(state);
+		return -1;
+	}
+	tevent_fd_set_auto_close(state->fde);
+
+	state->ctdb    = ctdb;
+	state->recmode = recmode;
+	state->c       = talloc_steal(state, c);
+
+	*async_reply = true;
+
+	return 0;
+}
+
+
+/*
+  try and get the recovery lock in shared storage - should only work
+  on the recovery master recovery daemon. Anywhere else is a bug
+ */
+bool ctdb_recovery_lock(struct ctdb_context *ctdb, bool keep)
+{
+	struct flock lock;
+
+	if (keep) {
+		DEBUG(DEBUG_ERR, ("Take the recovery lock\n"));
+	}
+	if (ctdb->recovery_lock_fd != -1) {
+		close(ctdb->recovery_lock_fd);
+		ctdb->recovery_lock_fd = -1;
+	}
+
+	ctdb->recovery_lock_fd = open(ctdb->recovery_lock_file, O_RDWR|O_CREAT, 0600);
+	if (ctdb->recovery_lock_fd == -1) {
+		DEBUG(DEBUG_ERR,("ctdb_recovery_lock: Unable to open %s - (%s)\n", 
+			 ctdb->recovery_lock_file, strerror(errno)));
+		return false;
+	}
+
+	set_close_on_exec(ctdb->recovery_lock_fd);
+
+	lock.l_type = F_WRLCK;
+	lock.l_whence = SEEK_SET;
+	lock.l_start = 0;
+	lock.l_len = 1;
+	lock.l_pid = 0;
+
+	if (fcntl(ctdb->recovery_lock_fd, F_SETLK, &lock) != 0) {
+		close(ctdb->recovery_lock_fd);
+		ctdb->recovery_lock_fd = -1;
+		if (keep) {
+			DEBUG(DEBUG_CRIT,("ctdb_recovery_lock: Failed to get recovery lock on '%s'\n", ctdb->recovery_lock_file));
+		}
+		return false;
+	}
+
+	if (!keep) {
+		close(ctdb->recovery_lock_fd);
+		ctdb->recovery_lock_fd = -1;
+	}
+
+	if (keep) {
+		DEBUG(DEBUG_NOTICE, ("Recovery lock taken successfully\n"));
+	}
+
+	DEBUG(DEBUG_NOTICE,("ctdb_recovery_lock: Got recovery lock on '%s'\n", ctdb->recovery_lock_file));
+
+	return true;
+}
+
+/*
+  delete a record as part of the vacuum process
+  only delete if we are not lmaster or dmaster, and our rsn is <= the provided rsn
+  use non-blocking locks
+
+  return 0 if the record was successfully deleted (i.e. it does not exist
+  when the function returns)
+  or !0 is the record still exists in the tdb after returning.
+ */
+static int delete_tdb_record(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db, struct ctdb_rec_data *rec)
+{
+	TDB_DATA key, data, data2;
+	struct ctdb_ltdb_header *hdr, *hdr2;
+	
+	/* these are really internal tdb functions - but we need them here for
+	   non-blocking lock of the freelist */
+	int tdb_lock_nonblock(struct tdb_context *tdb, int list, int ltype);
+	int tdb_unlock(struct tdb_context *tdb, int list, int ltype);
+
+
+	key.dsize = rec->keylen;
+	key.dptr  = &rec->data[0];
+	data.dsize = rec->datalen;
+	data.dptr = &rec->data[rec->keylen];
+
+	if (ctdb_lmaster(ctdb, &key) == ctdb->pnn) {
+		DEBUG(DEBUG_INFO,(__location__ " Called delete on record where we are lmaster\n"));
+		return -1;
+	}
+
+	if (data.dsize != sizeof(struct ctdb_ltdb_header)) {
+		DEBUG(DEBUG_ERR,(__location__ " Bad record size\n"));
+		return -1;
+	}
+
+	hdr = (struct ctdb_ltdb_header *)data.dptr;
+
+	/* use a non-blocking lock */
+	if (tdb_chainlock_nonblock(ctdb_db->ltdb->tdb, key) != 0) {
+		return -1;
+	}
+
+	data2 = tdb_fetch(ctdb_db->ltdb->tdb, key);
+	if (data2.dptr == NULL) {
+		tdb_chainunlock(ctdb_db->ltdb->tdb, key);
+		return 0;
+	}
+
+	if (data2.dsize < sizeof(struct ctdb_ltdb_header)) {
+		if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) == 0) {
+			if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
+				DEBUG(DEBUG_CRIT,(__location__ " Failed to delete corrupt record\n"));
+			}
+			tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
+			DEBUG(DEBUG_CRIT,(__location__ " Deleted corrupt record\n"));
+		}
+		tdb_chainunlock(ctdb_db->ltdb->tdb, key);
+		free(data2.dptr);
+		return 0;
+	}
+	
+	hdr2 = (struct ctdb_ltdb_header *)data2.dptr;
+
+	if (hdr2->rsn > hdr->rsn) {
+		tdb_chainunlock(ctdb_db->ltdb->tdb, key);
+		DEBUG(DEBUG_INFO,(__location__ " Skipping record with rsn=%llu - called with rsn=%llu\n",
+			 (unsigned long long)hdr2->rsn, (unsigned long long)hdr->rsn));
+		free(data2.dptr);
+		return -1;
+	}
+
+	/* do not allow deleting record that have readonly flags set. */
+	if (hdr->flags & CTDB_REC_RO_FLAGS) {
+		tdb_chainunlock(ctdb_db->ltdb->tdb, key);
+		DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly flags set\n"));
+		free(data2.dptr);
+		return -1;
+	}
+	if (hdr2->flags & CTDB_REC_RO_FLAGS) {
+		tdb_chainunlock(ctdb_db->ltdb->tdb, key);
+		DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly flags set\n"));
+		free(data2.dptr);
+		return -1;
+	}
+
+	if (hdr2->dmaster == ctdb->pnn) {
+		tdb_chainunlock(ctdb_db->ltdb->tdb, key);
+		DEBUG(DEBUG_INFO,(__location__ " Attempted delete record where we are the dmaster\n"));
+		free(data2.dptr);
+		return -1;
+	}
+
+	if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) != 0) {
+		tdb_chainunlock(ctdb_db->ltdb->tdb, key);
+		free(data2.dptr);
+		return -1;
+	}
+
+	if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
+		tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
+		tdb_chainunlock(ctdb_db->ltdb->tdb, key);
+		DEBUG(DEBUG_INFO,(__location__ " Failed to delete record\n"));
+		free(data2.dptr);
+		return -1;
+	}
+
+	tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
+	tdb_chainunlock(ctdb_db->ltdb->tdb, key);
+	free(data2.dptr);
+	return 0;
+}
+
+
+
+struct recovery_callback_state {
+	struct ctdb_req_control *c;
+};
+
+
+/*
+  called when the 'recovered' event script has finished
+ */
+static void ctdb_end_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
+{
+	struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
+
+	ctdb_enable_monitoring(ctdb);
+	CTDB_INCREMENT_STAT(ctdb, num_recoveries);
+
+	if (status != 0) {
+		DEBUG(DEBUG_ERR,(__location__ " recovered event script failed (status %d)\n", status));
+		if (status == -ETIME) {
+			ctdb_ban_self(ctdb);
+		}
+	}
+
+	ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
+	talloc_free(state);
+
+	gettimeofday(&ctdb->last_recovery_finished, NULL);
+
+	if (ctdb->runstate == CTDB_RUNSTATE_FIRST_RECOVERY) {
+		ctdb_set_runstate(ctdb, CTDB_RUNSTATE_STARTUP);
+	}
+}
+
+/*
+  recovery has finished
+ */
+int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb, 
+				struct ctdb_req_control *c,
+				bool *async_reply)
+{
+	int ret;
+	struct recovery_callback_state *state;
+
+	DEBUG(DEBUG_NOTICE,("Recovery has finished\n"));
+
+	ctdb_persistent_finish_trans3_commits(ctdb);
+
+	state = talloc(ctdb, struct recovery_callback_state);
+	CTDB_NO_MEMORY(ctdb, state);
+
+	state->c    = c;
+
+	ctdb_disable_monitoring(ctdb);
+
+	ret = ctdb_event_script_callback(ctdb, state,
+					 ctdb_end_recovery_callback, 
+					 state, 
+					 false,
+					 CTDB_EVENT_RECOVERED, "%s", "");
+
+	if (ret != 0) {
+		ctdb_enable_monitoring(ctdb);
+
+		DEBUG(DEBUG_ERR,(__location__ " Failed to end recovery\n"));
+		talloc_free(state);
+		return -1;
+	}
+
+	/* tell the control that we will be reply asynchronously */
+	state->c    = talloc_steal(state, c);
+	*async_reply = true;
+	return 0;
+}
+
+/*
+  called when the 'startrecovery' event script has finished
+ */
+static void ctdb_start_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
+{
+	struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
+
+	if (status != 0) {
+		DEBUG(DEBUG_ERR,(__location__ " startrecovery event script failed (status %d)\n", status));
+	}
+
+	ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
+	talloc_free(state);
+}
+
+/*
+  run the startrecovery eventscript
+ */
+int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb, 
+				struct ctdb_req_control *c,
+				bool *async_reply)
+{
+	int ret;
+	struct recovery_callback_state *state;
+
+	DEBUG(DEBUG_NOTICE,(__location__ " startrecovery eventscript has been invoked\n"));
+	gettimeofday(&ctdb->last_recovery_started, NULL);
+
+	state = talloc(ctdb, struct recovery_callback_state);
+	CTDB_NO_MEMORY(ctdb, state);
+
+	state->c    = talloc_steal(state, c);
+
+	ctdb_disable_monitoring(ctdb);
+
+	ret = ctdb_event_script_callback(ctdb, state,
+					 ctdb_start_recovery_callback, 
+					 state, false,
+					 CTDB_EVENT_START_RECOVERY,
+					 "%s", "");
+
+	if (ret != 0) {
+		DEBUG(DEBUG_ERR,(__location__ " Failed to start recovery\n"));
+		talloc_free(state);
+		return -1;
+	}
+
+	/* tell the control that we will be reply asynchronously */
+	*async_reply = true;
+	return 0;
+}
+
+/*
+ try to delete all these records as part of the vacuuming process
+ and return the records we failed to delete
+*/
+int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
+{
+	struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
+	struct ctdb_db_context *ctdb_db;
+	int i;
+	struct ctdb_rec_data *rec;
+	struct ctdb_marshall_buffer *records;
+
+	if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
+		DEBUG(DEBUG_ERR,(__location__ " invalid data in try_delete_records\n"));
+		return -1;
+	}
+
+	ctdb_db = find_ctdb_db(ctdb, reply->db_id);
+	if (!ctdb_db) {
+		DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
+		return -1;
+	}
+
+
+	DEBUG(DEBUG_DEBUG,("starting try_delete_records of %u records for dbid 0x%x\n",
+		 reply->count, reply->db_id));
+
+
+	/* create a blob to send back the records we couldnt delete */	
+	records = (struct ctdb_marshall_buffer *)
+			talloc_zero_size(outdata, 
+				    offsetof(struct ctdb_marshall_buffer, data));
+	if (records == NULL) {
+		DEBUG(DEBUG_ERR,(__location__ " Out of memory\n"));
+		return -1;
+	}
+	records->db_id = ctdb_db->db_id;
+
+
+	rec = (struct ctdb_rec_data *)&reply->data[0];
+	for (i=0;i<reply->count;i++) {
+		TDB_DATA key, data;
+
+		key.dptr = &rec->data[0];
+		key.dsize = rec->keylen;
+		data.dptr = &rec->data[key.dsize];
+		data.dsize = rec->datalen;
+
+		if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
+			DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record in indata\n"));
+			return -1;
+		}
+
+		/* If we cant delete the record we must add it to the reply
+		   so the lmaster knows it may not purge this record
+		*/
+		if (delete_tdb_record(ctdb, ctdb_db, rec) != 0) {
+			size_t old_size;
+			struct ctdb_ltdb_header *hdr;
+
+			hdr = (struct ctdb_ltdb_header *)data.dptr;
+			data.dptr += sizeof(*hdr);
+			data.dsize -= sizeof(*hdr);
+
+			DEBUG(DEBUG_INFO, (__location__ " Failed to vacuum delete record with hash 0x%08x\n", ctdb_hash(&key)));
+
+			old_size = talloc_get_size(records);
+			records = talloc_realloc_size(outdata, records, old_size + rec->length);
+			if (records == NULL) {
+				DEBUG(DEBUG_ERR,(__location__ " Failed to expand\n"));
+				return -1;
+			}
+			records->count++;
+			memcpy(old_size+(uint8_t *)records, rec, rec->length);
+		} 
+
+		rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
+	}	    
+
+
+	outdata->dptr = (uint8_t *)records;
+	outdata->dsize = talloc_get_size(records);
+
+	return 0;
+}
+
+/**
+ * Store a record as part of the vacuum process:
+ * This is called from the RECEIVE_RECORD control which
+ * the lmaster uses to send the current empty copy
+ * to all nodes for storing, before it lets the other
+ * nodes delete the records in the second phase with
+ * the TRY_DELETE_RECORDS control.
+ *
+ * Only store if we are not lmaster or dmaster, and our
+ * rsn is <= the provided rsn. Use non-blocking locks.
+ *
+ * return 0 if the record was successfully stored.
+ * return !0 if the record still exists in the tdb after returning.
+ */
+static int store_tdb_record(struct ctdb_context *ctdb,
+			    struct ctdb_db_context *ctdb_db,
+			    struct ctdb_rec_data *rec)
+{
+	TDB_DATA key, data, data2;
+	struct ctdb_ltdb_header *hdr, *hdr2;
+	int ret;
+
+	key.dsize = rec->keylen;
+	key.dptr = &rec->data[0];
+	data.dsize = rec->datalen;
+	data.dptr = &rec->data[rec->keylen];
+
+	if (ctdb_lmaster(ctdb, &key) == ctdb->pnn) {
+		DEBUG(DEBUG_INFO, (__location__ " Called store_tdb_record "
+				   "where we are lmaster\n"));
+		return -1;
+	}
+
+	if (data.dsize != sizeof(struct ctdb_ltdb_header)) {
+		DEBUG(DEBUG_ERR, (__location__ " Bad record size\n"));
+		return -1;
+	}
+
+	hdr = (struct ctdb_ltdb_header *)data.dptr;
+
+	/* use a non-blocking lock */
+	if (tdb_chainlock_nonblock(ctdb_db->ltdb->tdb, key) != 0) {
+		DEBUG(DEBUG_INFO, (__location__ " Failed to lock chain in non-blocking mode\n"));
+		return -1;
+	}
+
+	data2 = tdb_fetch(ctdb_db->ltdb->tdb, key);
+	if (data2.dptr == NULL || data2.dsize < sizeof(struct ctdb_ltdb_header)) {
+		tdb_store(ctdb_db->ltdb->tdb, key, data, 0);
+		DEBUG(DEBUG_INFO, (__location__ " Stored record\n"));
+		ret = 0;
+		goto done;
+	}
+
+	hdr2 = (struct ctdb_ltdb_header *)data2.dptr;
+
+	if (hdr2->rsn > hdr->rsn) {
+		DEBUG(DEBUG_INFO, (__location__ " Skipping record with "
+				   "rsn=%llu - called with rsn=%llu\n",
+				   (unsigned long long)hdr2->rsn,
+				   (unsigned long long)hdr->rsn));
+		ret = -1;
+		goto done;
+	}
+
+	/* do not allow vacuuming of records that have readonly flags set. */
+	if (hdr->flags & CTDB_REC_RO_FLAGS) {
+		DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly "
+				  "flags set\n"));
+		ret = -1;
+		goto done;
+	}
+	if (hdr2->flags & CTDB_REC_RO_FLAGS) {
+		DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly "
+				  "flags set\n"));
+		ret = -1;
+		goto done;
+	}
+
+	if (hdr2->dmaster == ctdb->pnn) {
+		DEBUG(DEBUG_INFO, (__location__ " Attempted to store record "
+				   "where we are the dmaster\n"));
+		ret = -1;
+		goto done;
+	}
+
+	if (tdb_store(ctdb_db->ltdb->tdb, key, data, 0) != 0) {
+		DEBUG(DEBUG_INFO,(__location__ " Failed to store record\n"));
+		ret = -1;
+		goto done;
+	}
+
+	ret = 0;
+
+done:
+	tdb_chainunlock(ctdb_db->ltdb->tdb, key);
+	free(data2.dptr);
+	return  ret;
+}
+
+
+
+/**
+ * Try to store all these records as part of the vacuuming process
+ * and return the records we failed to store.
+ */
+int32_t ctdb_control_receive_records(struct ctdb_context *ctdb,
+				     TDB_DATA indata, TDB_DATA *outdata)
+{
+	struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
+	struct ctdb_db_context *ctdb_db;
+	int i;
+	struct ctdb_rec_data *rec;
+	struct ctdb_marshall_buffer *records;
+
+	if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
+		DEBUG(DEBUG_ERR,
+		      (__location__ " invalid data in receive_records\n"));
+		return -1;
+	}
+
+	ctdb_db = find_ctdb_db(ctdb, reply->db_id);
+	if (!ctdb_db) {
+		DEBUG(DEBUG_ERR, (__location__ " Unknown db 0x%08x\n",
+				  reply->db_id));
+		return -1;
+	}
+
+	DEBUG(DEBUG_DEBUG, ("starting receive_records of %u records for "
+			    "dbid 0x%x\n", reply->count, reply->db_id));
+
+	/* create a blob to send back the records we could not store */
+	records = (struct ctdb_marshall_buffer *)
+			talloc_zero_size(outdata,
+				offsetof(struct ctdb_marshall_buffer, data));
+	if (records == NULL) {
+		DEBUG(DEBUG_ERR, (__location__ " Out of memory\n"));
+		return -1;
+	}
+	records->db_id = ctdb_db->db_id;
+
+	rec = (struct ctdb_rec_data *)&reply->data[0];
+	for (i=0; i<reply->count; i++) {
+		TDB_DATA key, data;
+
+		key.dptr = &rec->data[0];
+		key.dsize = rec->keylen;
+		data.dptr = &rec->data[key.dsize];
+		data.dsize = rec->datalen;
+
+		if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
+			DEBUG(DEBUG_CRIT, (__location__ " bad ltdb record "
+					   "in indata\n"));
+			return -1;
+		}
+
+		/*
+		 * If we can not store the record we must add it to the reply
+		 * so the lmaster knows it may not purge this record.
+		 */
+		if (store_tdb_record(ctdb, ctdb_db, rec) != 0) {
+			size_t old_size;
+			struct ctdb_ltdb_header *hdr;
+
+			hdr = (struct ctdb_ltdb_header *)data.dptr;
+			data.dptr += sizeof(*hdr);
+			data.dsize -= sizeof(*hdr);
+
+			DEBUG(DEBUG_INFO, (__location__ " Failed to store "
+					   "record with hash 0x%08x in vacuum "
+					   "via RECEIVE_RECORDS\n",
+					   ctdb_hash(&key)));
+
+			old_size = talloc_get_size(records);
+			records = talloc_realloc_size(outdata, records,
+						      old_size + rec->length);
+			if (records == NULL) {
+				DEBUG(DEBUG_ERR, (__location__ " Failed to "
+						  "expand\n"));
+				return -1;
+			}
+			records->count++;
+			memcpy(old_size+(uint8_t *)records, rec, rec->length);
+		}
+
+		rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
+	}
+
+
+	outdata->dptr = (uint8_t *)records;
+	outdata->dsize = talloc_get_size(records);
+
+	return 0;
+}
+
+
+/*
+  report capabilities
+ */
+int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb, TDB_DATA *outdata)
+{
+	uint32_t *capabilities = NULL;
+
+	capabilities = talloc(outdata, uint32_t);
+	CTDB_NO_MEMORY(ctdb, capabilities);
+	*capabilities = ctdb->capabilities;
+
+	outdata->dsize = sizeof(uint32_t);
+	outdata->dptr = (uint8_t *)capabilities;
+
+	return 0;	
+}
+
+/* The recovery daemon will ping us at regular intervals.
+   If we havent been pinged for a while we assume the recovery
+   daemon is inoperable and we restart.
+*/
+static void ctdb_recd_ping_timeout(struct event_context *ev, struct timed_event *te, struct timeval t, void *p)
+{
+	struct ctdb_context *ctdb = talloc_get_type(p, struct ctdb_context);
+	uint32_t *count = talloc_get_type(ctdb->recd_ping_count, uint32_t);
+
+	DEBUG(DEBUG_ERR, ("Recovery daemon ping timeout. Count : %u\n", *count));
+
+	if (*count < ctdb->tunable.recd_ping_failcount) {
+		(*count)++;
+		event_add_timed(ctdb->ev, ctdb->recd_ping_count, 
+			timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
+			ctdb_recd_ping_timeout, ctdb);
+		return;
+	}
+
+	DEBUG(DEBUG_ERR, ("Final timeout for recovery daemon ping. Restarting recovery daemon. (This can be caused if the cluster filesystem has hung)\n"));
+
+	ctdb_stop_recoverd(ctdb);
+	ctdb_start_recoverd(ctdb);
+}
+
+int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb)
+{
+	talloc_free(ctdb->recd_ping_count);
+
+	ctdb->recd_ping_count = talloc_zero(ctdb, uint32_t);
+	CTDB_NO_MEMORY(ctdb, ctdb->recd_ping_count);
+
+	if (ctdb->tunable.recd_ping_timeout != 0) {
+		event_add_timed(ctdb->ev, ctdb->recd_ping_count, 
+			timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
+			ctdb_recd_ping_timeout, ctdb);
+	}
+
+	return 0;
+}
+
+
+
+int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata)
+{
+	uint32_t new_recmaster;
+
+	CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
+	new_recmaster = ((uint32_t *)(&indata.dptr[0]))[0];
+
+	if (ctdb->pnn != new_recmaster && ctdb->recovery_master == ctdb->pnn) {
+		DEBUG(DEBUG_NOTICE,
+		      ("This node (%u) is no longer the recovery master\n", ctdb->pnn));
+	}
+
+	if (ctdb->pnn == new_recmaster && ctdb->recovery_master != new_recmaster) {
+		DEBUG(DEBUG_NOTICE,
+		      ("This node (%u) is now the recovery master\n", ctdb->pnn));
+	}
+
+	ctdb->recovery_master = new_recmaster;
+	return 0;
+}
+
+
+int32_t ctdb_control_stop_node(struct ctdb_context *ctdb)
+{
+	DEBUG(DEBUG_NOTICE, ("Stopping node\n"));
+	ctdb_disable_monitoring(ctdb);
+	ctdb->nodes[ctdb->pnn]->flags |= NODE_FLAGS_STOPPED;
+
+	return 0;
+}
+
+int32_t ctdb_control_continue_node(struct ctdb_context *ctdb)
+{
+	DEBUG(DEBUG_NOTICE, ("Continue node\n"));
+	ctdb->nodes[ctdb->pnn]->flags &= ~NODE_FLAGS_STOPPED;
+
+	return 0;
+}
+