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-rw-r--r--source4/cluster/ctdb/server/ctdb_call.c737
-rw-r--r--source4/cluster/ctdb/server/ctdb_control.c499
-rw-r--r--source4/cluster/ctdb/server/ctdb_daemon.c927
-rw-r--r--source4/cluster/ctdb/server/ctdb_freeze.c256
-rw-r--r--source4/cluster/ctdb/server/ctdb_lockwait.c165
-rw-r--r--source4/cluster/ctdb/server/ctdb_ltdb_server.c366
-rw-r--r--source4/cluster/ctdb/server/ctdb_monitor.c227
-rw-r--r--source4/cluster/ctdb/server/ctdb_recover.c680
-rw-r--r--source4/cluster/ctdb/server/ctdb_recoverd.c1511
-rw-r--r--source4/cluster/ctdb/server/ctdb_server.c469
-rw-r--r--source4/cluster/ctdb/server/ctdb_takeover.c822
-rw-r--r--source4/cluster/ctdb/server/ctdb_traverse.c463
-rw-r--r--source4/cluster/ctdb/server/ctdb_tunables.c163
-rw-r--r--source4/cluster/ctdb/server/ctdbd.c229
-rw-r--r--source4/cluster/ctdb/server/eventscript.c191
15 files changed, 7705 insertions, 0 deletions
diff --git a/source4/cluster/ctdb/server/ctdb_call.c b/source4/cluster/ctdb/server/ctdb_call.c
new file mode 100644
index 0000000000..bbe07717ed
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_call.c
@@ -0,0 +1,737 @@
+/*
+ ctdb_call protocol code
+
+ Copyright (C) Andrew Tridgell 2006
+
+ 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/>.
+*/
+/*
+ see http://wiki.samba.org/index.php/Samba_%26_Clustering for
+ protocol design and packet details
+*/
+#include "includes.h"
+#include "lib/events/events.h"
+#include "lib/tdb/include/tdb.h"
+#include "lib/util/dlinklist.h"
+#include "system/network.h"
+#include "system/filesys.h"
+#include "../include/ctdb_private.h"
+
+/*
+ find the ctdb_db from a db index
+ */
+ struct ctdb_db_context *find_ctdb_db(struct ctdb_context *ctdb, uint32_t id)
+{
+ struct ctdb_db_context *ctdb_db;
+
+ for (ctdb_db=ctdb->db_list; ctdb_db; ctdb_db=ctdb_db->next) {
+ if (ctdb_db->db_id == id) {
+ break;
+ }
+ }
+ return ctdb_db;
+}
+
+
+/*
+ a varient of input packet that can be used in lock requeue
+*/
+static void ctdb_call_input_pkt(void *p, struct ctdb_req_header *hdr)
+{
+ struct ctdb_context *ctdb = talloc_get_type(p, struct ctdb_context);
+ ctdb_input_pkt(ctdb, hdr);
+}
+
+
+/*
+ send an error reply
+*/
+static void ctdb_send_error(struct ctdb_context *ctdb,
+ struct ctdb_req_header *hdr, uint32_t status,
+ const char *fmt, ...) PRINTF_ATTRIBUTE(4,5);
+static void ctdb_send_error(struct ctdb_context *ctdb,
+ struct ctdb_req_header *hdr, uint32_t status,
+ const char *fmt, ...)
+{
+ va_list ap;
+ struct ctdb_reply_error *r;
+ char *msg;
+ int msglen, len;
+
+ va_start(ap, fmt);
+ msg = talloc_vasprintf(ctdb, fmt, ap);
+ if (msg == NULL) {
+ ctdb_fatal(ctdb, "Unable to allocate error in ctdb_send_error\n");
+ }
+ va_end(ap);
+
+ msglen = strlen(msg)+1;
+ len = offsetof(struct ctdb_reply_error, msg);
+ r = ctdb_transport_allocate(ctdb, msg, CTDB_REPLY_ERROR, len + msglen,
+ struct ctdb_reply_error);
+ CTDB_NO_MEMORY_FATAL(ctdb, r);
+
+ r->hdr.destnode = hdr->srcnode;
+ r->hdr.reqid = hdr->reqid;
+ r->status = status;
+ r->msglen = msglen;
+ memcpy(&r->msg[0], msg, msglen);
+
+ ctdb_queue_packet(ctdb, &r->hdr);
+
+ talloc_free(msg);
+}
+
+
+/*
+ send a redirect reply
+*/
+static void ctdb_call_send_redirect(struct ctdb_context *ctdb,
+ TDB_DATA key,
+ struct ctdb_req_call *c,
+ struct ctdb_ltdb_header *header)
+{
+
+ uint32_t lmaster = ctdb_lmaster(ctdb, &key);
+ if (ctdb->vnn == lmaster) {
+ c->hdr.destnode = header->dmaster;
+ } else if ((c->hopcount % ctdb->tunable.max_redirect_count) == 0) {
+ c->hdr.destnode = lmaster;
+ } else {
+ c->hdr.destnode = header->dmaster;
+ }
+ c->hopcount++;
+ ctdb_queue_packet(ctdb, &c->hdr);
+}
+
+
+/*
+ send a dmaster reply
+
+ caller must have the chainlock before calling this routine. Caller must be
+ the lmaster
+*/
+static void ctdb_send_dmaster_reply(struct ctdb_db_context *ctdb_db,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA key, TDB_DATA data,
+ uint32_t new_dmaster,
+ uint32_t reqid)
+{
+ struct ctdb_context *ctdb = ctdb_db->ctdb;
+ struct ctdb_reply_dmaster *r;
+ int ret, len;
+ TALLOC_CTX *tmp_ctx;
+
+ if (ctdb->vnn != ctdb_lmaster(ctdb, &key)) {
+ DEBUG(0,(__location__ " Caller is not lmaster!\n"));
+ return;
+ }
+
+ header->dmaster = new_dmaster;
+ ret = ctdb_ltdb_store(ctdb_db, key, header, data);
+ if (ret != 0) {
+ ctdb_fatal(ctdb, "ctdb_req_dmaster unable to update dmaster");
+ return;
+ }
+
+ /* put the packet on a temporary context, allowing us to safely free
+ it below even if ctdb_reply_dmaster() has freed it already */
+ tmp_ctx = talloc_new(ctdb);
+
+ /* send the CTDB_REPLY_DMASTER */
+ len = offsetof(struct ctdb_reply_dmaster, data) + key.dsize + data.dsize;
+ r = ctdb_transport_allocate(ctdb, tmp_ctx, CTDB_REPLY_DMASTER, len,
+ struct ctdb_reply_dmaster);
+ CTDB_NO_MEMORY_FATAL(ctdb, r);
+
+ r->hdr.destnode = new_dmaster;
+ r->hdr.reqid = reqid;
+ r->rsn = header->rsn;
+ r->keylen = key.dsize;
+ r->datalen = data.dsize;
+ r->db_id = ctdb_db->db_id;
+ memcpy(&r->data[0], key.dptr, key.dsize);
+ memcpy(&r->data[key.dsize], data.dptr, data.dsize);
+
+ ctdb_queue_packet(ctdb, &r->hdr);
+
+ talloc_free(tmp_ctx);
+}
+
+/*
+ send a dmaster request (give another node the dmaster for a record)
+
+ This is always sent to the lmaster, which ensures that the lmaster
+ always knows who the dmaster is. The lmaster will then send a
+ CTDB_REPLY_DMASTER to the new dmaster
+*/
+static void ctdb_call_send_dmaster(struct ctdb_db_context *ctdb_db,
+ struct ctdb_req_call *c,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA *key, TDB_DATA *data)
+{
+ struct ctdb_req_dmaster *r;
+ struct ctdb_context *ctdb = ctdb_db->ctdb;
+ int len;
+ uint32_t lmaster = ctdb_lmaster(ctdb, key);
+
+ if (lmaster == ctdb->vnn) {
+ ctdb_send_dmaster_reply(ctdb_db, header, *key, *data,
+ c->hdr.srcnode, c->hdr.reqid);
+ return;
+ }
+
+ len = offsetof(struct ctdb_req_dmaster, data) + key->dsize + data->dsize;
+ r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REQ_DMASTER, len,
+ struct ctdb_req_dmaster);
+ CTDB_NO_MEMORY_FATAL(ctdb, r);
+ r->hdr.destnode = lmaster;
+ r->hdr.reqid = c->hdr.reqid;
+ r->db_id = c->db_id;
+ r->rsn = header->rsn;
+ r->dmaster = c->hdr.srcnode;
+ r->keylen = key->dsize;
+ r->datalen = data->dsize;
+ memcpy(&r->data[0], key->dptr, key->dsize);
+ memcpy(&r->data[key->dsize], data->dptr, data->dsize);
+
+ header->dmaster = c->hdr.srcnode;
+ if (ctdb_ltdb_store(ctdb_db, *key, header, *data) != 0) {
+ ctdb_fatal(ctdb, "Failed to store record in ctdb_call_send_dmaster");
+ }
+
+ ctdb_queue_packet(ctdb, &r->hdr);
+
+ talloc_free(r);
+}
+
+/*
+ called when a CTDB_REPLY_DMASTER packet comes in, or when the lmaster
+ gets a CTDB_REQUEST_DMASTER for itself. We become the dmaster.
+
+ must be called with the chainlock held. This function releases the chainlock
+*/
+static void ctdb_become_dmaster(struct ctdb_db_context *ctdb_db,
+ uint32_t reqid, TDB_DATA key, TDB_DATA data,
+ uint64_t rsn)
+{
+ struct ctdb_call_state *state;
+ struct ctdb_context *ctdb = ctdb_db->ctdb;
+ struct ctdb_ltdb_header header;
+
+ DEBUG(2,("vnn %u dmaster response %08x\n", ctdb->vnn, ctdb_hash(&key)));
+
+ ZERO_STRUCT(header);
+ header.rsn = rsn + 1;
+ header.dmaster = ctdb->vnn;
+
+ if (ctdb_ltdb_store(ctdb_db, key, &header, data) != 0) {
+ ctdb_fatal(ctdb, "ctdb_reply_dmaster store failed\n");
+ ctdb_ltdb_unlock(ctdb_db, key);
+ return;
+ }
+
+ state = ctdb_reqid_find(ctdb, reqid, struct ctdb_call_state);
+
+ if (state == NULL) {
+ DEBUG(0,("vnn %u Invalid reqid %u in ctdb_become_dmaster\n",
+ ctdb->vnn, reqid));
+ ctdb_ltdb_unlock(ctdb_db, key);
+ return;
+ }
+
+ if (reqid != state->reqid) {
+ /* we found a record but it was the wrong one */
+ DEBUG(0, ("Dropped orphan in ctdb_become_dmaster with reqid:%u\n",reqid));
+ ctdb_ltdb_unlock(ctdb_db, key);
+ return;
+ }
+
+ ctdb_call_local(ctdb_db, &state->call, &header, state, &data, ctdb->vnn);
+
+ ctdb_ltdb_unlock(ctdb_db, state->call.key);
+
+ state->state = CTDB_CALL_DONE;
+ if (state->async.fn) {
+ state->async.fn(state);
+ }
+}
+
+
+
+/*
+ called when a CTDB_REQ_DMASTER packet comes in
+
+ this comes into the lmaster for a record when the current dmaster
+ wants to give up the dmaster role and give it to someone else
+*/
+void ctdb_request_dmaster(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
+{
+ struct ctdb_req_dmaster *c = (struct ctdb_req_dmaster *)hdr;
+ TDB_DATA key, data, data2;
+ struct ctdb_ltdb_header header;
+ struct ctdb_db_context *ctdb_db;
+ int ret;
+
+ key.dptr = c->data;
+ key.dsize = c->keylen;
+ data.dptr = c->data + c->keylen;
+ data.dsize = c->datalen;
+
+ ctdb_db = find_ctdb_db(ctdb, c->db_id);
+ if (!ctdb_db) {
+ ctdb_send_error(ctdb, hdr, -1,
+ "Unknown database in request. db_id==0x%08x",
+ c->db_id);
+ return;
+ }
+
+ /* fetch the current record */
+ ret = ctdb_ltdb_lock_fetch_requeue(ctdb_db, key, &header, hdr, &data2,
+ ctdb_call_input_pkt, ctdb, False);
+ if (ret == -1) {
+ ctdb_fatal(ctdb, "ctdb_req_dmaster failed to fetch record");
+ return;
+ }
+ if (ret == -2) {
+ DEBUG(2,(__location__ " deferring ctdb_request_dmaster\n"));
+ return;
+ }
+
+ if (ctdb_lmaster(ctdb, &key) != ctdb->vnn) {
+ DEBUG(0,("vnn %u dmaster request to non-lmaster lmaster=%u gen=%u curgen=%u\n",
+ ctdb->vnn, ctdb_lmaster(ctdb, &key),
+ hdr->generation, ctdb->vnn_map->generation));
+ ctdb_fatal(ctdb, "ctdb_req_dmaster to non-lmaster");
+ }
+
+ DEBUG(2,("vnn %u dmaster request on %08x for %u from %u\n",
+ ctdb->vnn, ctdb_hash(&key), c->dmaster, c->hdr.srcnode));
+
+ /* its a protocol error if the sending node is not the current dmaster */
+ if (header.dmaster != hdr->srcnode) {
+ DEBUG(0,("vnn %u dmaster request non-master %u dmaster=%u key %08x dbid 0x%08x gen=%u curgen=%u\n",
+ ctdb->vnn, hdr->srcnode, header.dmaster, ctdb_hash(&key),
+ ctdb_db->db_id, hdr->generation, ctdb->vnn_map->generation));
+ ctdb_fatal(ctdb, "ctdb_req_dmaster from non-master");
+ return;
+ }
+
+ /* use the rsn from the sending node */
+ header.rsn = c->rsn;
+
+ /* check if the new dmaster is the lmaster, in which case we
+ skip the dmaster reply */
+ if (c->dmaster == ctdb->vnn) {
+ ctdb_become_dmaster(ctdb_db, hdr->reqid, key, data, c->rsn);
+ } else {
+ ctdb_send_dmaster_reply(ctdb_db, &header, key, data, c->dmaster, hdr->reqid);
+ ctdb_ltdb_unlock(ctdb_db, key);
+ }
+}
+
+
+/*
+ called when a CTDB_REQ_CALL packet comes in
+*/
+void ctdb_request_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
+{
+ struct ctdb_req_call *c = (struct ctdb_req_call *)hdr;
+ TDB_DATA data;
+ struct ctdb_reply_call *r;
+ int ret, len;
+ struct ctdb_ltdb_header header;
+ struct ctdb_call call;
+ struct ctdb_db_context *ctdb_db;
+
+ ctdb_db = find_ctdb_db(ctdb, c->db_id);
+ if (!ctdb_db) {
+ ctdb_send_error(ctdb, hdr, -1,
+ "Unknown database in request. db_id==0x%08x",
+ c->db_id);
+ return;
+ }
+
+ call.call_id = c->callid;
+ call.key.dptr = c->data;
+ call.key.dsize = c->keylen;
+ call.call_data.dptr = c->data + c->keylen;
+ call.call_data.dsize = c->calldatalen;
+
+ /* determine if we are the dmaster for this key. This also
+ fetches the record data (if any), thus avoiding a 2nd fetch of the data
+ if the call will be answered locally */
+
+ ret = ctdb_ltdb_lock_fetch_requeue(ctdb_db, call.key, &header, hdr, &data,
+ ctdb_call_input_pkt, ctdb, False);
+ if (ret == -1) {
+ ctdb_send_error(ctdb, hdr, ret, "ltdb fetch failed in ctdb_request_call");
+ return;
+ }
+ if (ret == -2) {
+ DEBUG(2,(__location__ " deferred ctdb_request_call\n"));
+ return;
+ }
+
+ /* if we are not the dmaster, then send a redirect to the
+ requesting node */
+ if (header.dmaster != ctdb->vnn) {
+ talloc_free(data.dptr);
+ ctdb_call_send_redirect(ctdb, call.key, c, &header);
+ ctdb_ltdb_unlock(ctdb_db, call.key);
+ return;
+ }
+
+ if (c->hopcount > ctdb->statistics.max_hop_count) {
+ ctdb->statistics.max_hop_count = c->hopcount;
+ }
+
+ /* if this nodes has done enough consecutive calls on the same record
+ then give them the record
+ or if the node requested an immediate migration
+ */
+ if ( c->hdr.srcnode != ctdb->vnn &&
+ ((header.laccessor == c->hdr.srcnode
+ && header.lacount >= ctdb->tunable.max_lacount)
+ || (c->flags & CTDB_IMMEDIATE_MIGRATION)) ) {
+ DEBUG(2,("vnn %u starting migration of %08x to %u\n",
+ ctdb->vnn, ctdb_hash(&call.key), c->hdr.srcnode));
+ ctdb_call_send_dmaster(ctdb_db, c, &header, &call.key, &data);
+ talloc_free(data.dptr);
+ ctdb_ltdb_unlock(ctdb_db, call.key);
+ return;
+ }
+
+ ctdb_call_local(ctdb_db, &call, &header, hdr, &data, c->hdr.srcnode);
+
+ ctdb_ltdb_unlock(ctdb_db, call.key);
+
+ len = offsetof(struct ctdb_reply_call, data) + call.reply_data.dsize;
+ r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CALL, len,
+ struct ctdb_reply_call);
+ CTDB_NO_MEMORY_FATAL(ctdb, r);
+ r->hdr.destnode = hdr->srcnode;
+ r->hdr.reqid = hdr->reqid;
+ r->status = call.status;
+ r->datalen = call.reply_data.dsize;
+ if (call.reply_data.dsize) {
+ memcpy(&r->data[0], call.reply_data.dptr, call.reply_data.dsize);
+ }
+
+ ctdb_queue_packet(ctdb, &r->hdr);
+
+ talloc_free(r);
+}
+
+/*
+ called when a CTDB_REPLY_CALL packet comes in
+
+ This packet comes in response to a CTDB_REQ_CALL request packet. It
+ contains any reply data from the call
+*/
+void ctdb_reply_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
+{
+ struct ctdb_reply_call *c = (struct ctdb_reply_call *)hdr;
+ struct ctdb_call_state *state;
+
+ state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_call_state);
+ if (state == NULL) {
+ DEBUG(0, (__location__ " reqid %u not found\n", hdr->reqid));
+ return;
+ }
+
+ if (hdr->reqid != state->reqid) {
+ /* we found a record but it was the wrong one */
+ DEBUG(0, ("Dropped orphaned call reply with reqid:%u\n",hdr->reqid));
+ return;
+ }
+
+ state->call.reply_data.dptr = c->data;
+ state->call.reply_data.dsize = c->datalen;
+ state->call.status = c->status;
+
+ talloc_steal(state, c);
+
+ state->state = CTDB_CALL_DONE;
+ if (state->async.fn) {
+ state->async.fn(state);
+ }
+}
+
+
+/*
+ called when a CTDB_REPLY_DMASTER packet comes in
+
+ This packet comes in from the lmaster response to a CTDB_REQ_CALL
+ request packet. It means that the current dmaster wants to give us
+ the dmaster role
+*/
+void ctdb_reply_dmaster(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
+{
+ struct ctdb_reply_dmaster *c = (struct ctdb_reply_dmaster *)hdr;
+ struct ctdb_db_context *ctdb_db;
+ TDB_DATA key, data;
+ int ret;
+
+ ctdb_db = find_ctdb_db(ctdb, c->db_id);
+ if (ctdb_db == NULL) {
+ DEBUG(0,("Unknown db_id 0x%x in ctdb_reply_dmaster\n", c->db_id));
+ return;
+ }
+
+ key.dptr = c->data;
+ key.dsize = c->keylen;
+ data.dptr = &c->data[key.dsize];
+ data.dsize = c->datalen;
+
+ ret = ctdb_ltdb_lock_requeue(ctdb_db, key, hdr,
+ ctdb_call_input_pkt, ctdb, False);
+ if (ret == -2) {
+ return;
+ }
+ if (ret != 0) {
+ DEBUG(0,(__location__ " Failed to get lock in ctdb_reply_dmaster\n"));
+ return;
+ }
+
+ ctdb_become_dmaster(ctdb_db, hdr->reqid, key, data, c->rsn);
+}
+
+
+/*
+ called when a CTDB_REPLY_ERROR packet comes in
+*/
+void ctdb_reply_error(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
+{
+ struct ctdb_reply_error *c = (struct ctdb_reply_error *)hdr;
+ struct ctdb_call_state *state;
+
+ state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_call_state);
+ if (state == NULL) {
+ DEBUG(0,("vnn %u Invalid reqid %u in ctdb_reply_error\n",
+ ctdb->vnn, hdr->reqid));
+ return;
+ }
+
+ if (hdr->reqid != state->reqid) {
+ /* we found a record but it was the wrong one */
+ DEBUG(0, ("Dropped orphaned error reply with reqid:%u\n",hdr->reqid));
+ return;
+ }
+
+ talloc_steal(state, c);
+
+ state->state = CTDB_CALL_ERROR;
+ state->errmsg = (char *)c->msg;
+ if (state->async.fn) {
+ state->async.fn(state);
+ }
+}
+
+
+/*
+ destroy a ctdb_call
+*/
+static int ctdb_call_destructor(struct ctdb_call_state *state)
+{
+ DLIST_REMOVE(state->ctdb_db->ctdb->pending_calls, state);
+ ctdb_reqid_remove(state->ctdb_db->ctdb, state->reqid);
+ return 0;
+}
+
+
+/*
+ called when a ctdb_call needs to be resent after a reconfigure event
+*/
+static void ctdb_call_resend(struct ctdb_call_state *state)
+{
+ struct ctdb_context *ctdb = state->ctdb_db->ctdb;
+
+ state->generation = ctdb->vnn_map->generation;
+
+ /* use a new reqid, in case the old reply does eventually come in */
+ ctdb_reqid_remove(ctdb, state->reqid);
+ state->reqid = ctdb_reqid_new(ctdb, state);
+ state->c->hdr.reqid = state->reqid;
+
+ /* update the generation count for this request, so its valid with the new vnn_map */
+ state->c->hdr.generation = state->generation;
+
+ /* send the packet to ourselves, it will be redirected appropriately */
+ state->c->hdr.destnode = ctdb->vnn;
+
+ ctdb_queue_packet(ctdb, &state->c->hdr);
+ DEBUG(0,("resent ctdb_call\n"));
+}
+
+/*
+ resend all pending calls on recovery
+ */
+void ctdb_call_resend_all(struct ctdb_context *ctdb)
+{
+ struct ctdb_call_state *state, *next;
+ for (state=ctdb->pending_calls;state;state=next) {
+ next = state->next;
+ ctdb_call_resend(state);
+ }
+}
+
+/*
+ this allows the caller to setup a async.fn
+*/
+static void call_local_trigger(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *private_data)
+{
+ struct ctdb_call_state *state = talloc_get_type(private_data, struct ctdb_call_state);
+ if (state->async.fn) {
+ state->async.fn(state);
+ }
+}
+
+
+/*
+ construct an event driven local ctdb_call
+
+ this is used so that locally processed ctdb_call requests are processed
+ in an event driven manner
+*/
+struct ctdb_call_state *ctdb_call_local_send(struct ctdb_db_context *ctdb_db,
+ struct ctdb_call *call,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA *data)
+{
+ struct ctdb_call_state *state;
+ struct ctdb_context *ctdb = ctdb_db->ctdb;
+ int ret;
+
+ state = talloc_zero(ctdb_db, struct ctdb_call_state);
+ CTDB_NO_MEMORY_NULL(ctdb, state);
+
+ talloc_steal(state, data->dptr);
+
+ state->state = CTDB_CALL_DONE;
+ state->call = *call;
+ state->ctdb_db = ctdb_db;
+
+ ret = ctdb_call_local(ctdb_db, &state->call, header, state, data, ctdb->vnn);
+
+ event_add_timed(ctdb->ev, state, timeval_zero(), call_local_trigger, state);
+
+ return state;
+}
+
+
+/*
+ make a remote ctdb call - async send. Called in daemon context.
+
+ This constructs a ctdb_call request and queues it for processing.
+ This call never blocks.
+*/
+struct ctdb_call_state *ctdb_daemon_call_send_remote(struct ctdb_db_context *ctdb_db,
+ struct ctdb_call *call,
+ struct ctdb_ltdb_header *header)
+{
+ uint32_t len;
+ struct ctdb_call_state *state;
+ struct ctdb_context *ctdb = ctdb_db->ctdb;
+
+ state = talloc_zero(ctdb_db, struct ctdb_call_state);
+ CTDB_NO_MEMORY_NULL(ctdb, state);
+ state->reqid = ctdb_reqid_new(ctdb, state);
+ state->ctdb_db = ctdb_db;
+ talloc_set_destructor(state, ctdb_call_destructor);
+
+ len = offsetof(struct ctdb_req_call, data) + call->key.dsize + call->call_data.dsize;
+ state->c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CALL, len,
+ struct ctdb_req_call);
+ CTDB_NO_MEMORY_NULL(ctdb, state->c);
+ state->c->hdr.destnode = header->dmaster;
+
+ /* this limits us to 16k outstanding messages - not unreasonable */
+ state->c->hdr.reqid = state->reqid;
+ state->c->flags = call->flags;
+ state->c->db_id = ctdb_db->db_id;
+ state->c->callid = call->call_id;
+ state->c->hopcount = 0;
+ state->c->keylen = call->key.dsize;
+ state->c->calldatalen = call->call_data.dsize;
+ memcpy(&state->c->data[0], call->key.dptr, call->key.dsize);
+ memcpy(&state->c->data[call->key.dsize],
+ call->call_data.dptr, call->call_data.dsize);
+ state->call = *call;
+ state->call.call_data.dptr = &state->c->data[call->key.dsize];
+ state->call.key.dptr = &state->c->data[0];
+
+ state->state = CTDB_CALL_WAIT;
+ state->generation = ctdb->vnn_map->generation;
+
+ DLIST_ADD(ctdb->pending_calls, state);
+
+ ctdb_queue_packet(ctdb, &state->c->hdr);
+
+ return state;
+}
+
+/*
+ make a remote ctdb call - async recv - called in daemon context
+
+ This is called when the program wants to wait for a ctdb_call to complete and get the
+ results. This call will block unless the call has already completed.
+*/
+int ctdb_daemon_call_recv(struct ctdb_call_state *state, struct ctdb_call *call)
+{
+ while (state->state < CTDB_CALL_DONE) {
+ event_loop_once(state->ctdb_db->ctdb->ev);
+ }
+ if (state->state != CTDB_CALL_DONE) {
+ ctdb_set_error(state->ctdb_db->ctdb, "%s", state->errmsg);
+ talloc_free(state);
+ return -1;
+ }
+
+ if (state->call.reply_data.dsize) {
+ call->reply_data.dptr = talloc_memdup(state->ctdb_db->ctdb,
+ state->call.reply_data.dptr,
+ state->call.reply_data.dsize);
+ call->reply_data.dsize = state->call.reply_data.dsize;
+ } else {
+ call->reply_data.dptr = NULL;
+ call->reply_data.dsize = 0;
+ }
+ call->status = state->call.status;
+ talloc_free(state);
+ return 0;
+}
+
+
+/*
+ send a keepalive packet to the other node
+*/
+void ctdb_send_keepalive(struct ctdb_context *ctdb, uint32_t destnode)
+{
+ struct ctdb_req_keepalive *r;
+
+ r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REQ_KEEPALIVE,
+ sizeof(struct ctdb_req_keepalive),
+ struct ctdb_req_keepalive);
+ CTDB_NO_MEMORY_FATAL(ctdb, r);
+ r->hdr.destnode = destnode;
+ r->hdr.reqid = 0;
+
+ ctdb->statistics.keepalive_packets_sent++;
+
+ ctdb_queue_packet(ctdb, &r->hdr);
+
+ talloc_free(r);
+}
diff --git a/source4/cluster/ctdb/server/ctdb_control.c b/source4/cluster/ctdb/server/ctdb_control.c
new file mode 100644
index 0000000000..69848bb15c
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_control.c
@@ -0,0 +1,499 @@
+/*
+ ctdb_control protocol code
+
+ Copyright (C) Andrew Tridgell 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 "lib/events/events.h"
+#include "lib/tdb/include/tdb.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"
+
+struct ctdb_control_state {
+ struct ctdb_context *ctdb;
+ uint32_t reqid;
+ ctdb_control_callback_fn_t callback;
+ void *private_data;
+ unsigned flags;
+};
+
+/*
+ process a control request
+ */
+static int32_t ctdb_control_dispatch(struct ctdb_context *ctdb,
+ struct ctdb_req_control *c,
+ TDB_DATA indata,
+ TDB_DATA *outdata, uint32_t srcnode,
+ const char **errormsg,
+ bool *async_reply)
+{
+ uint32_t opcode = c->opcode;
+ uint64_t srvid = c->srvid;
+ uint32_t client_id = c->client_id;
+
+ switch (opcode) {
+ case CTDB_CONTROL_PROCESS_EXISTS: {
+ CHECK_CONTROL_DATA_SIZE(sizeof(pid_t));
+ return kill(*(pid_t *)indata.dptr, 0);
+ }
+
+ case CTDB_CONTROL_SET_DEBUG: {
+ CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
+ LogLevel = *(uint32_t *)indata.dptr;
+ return 0;
+ }
+
+ case CTDB_CONTROL_GET_DEBUG: {
+ CHECK_CONTROL_DATA_SIZE(0);
+ outdata->dptr = (uint8_t *)&LogLevel;
+ outdata->dsize = sizeof(LogLevel);
+ return 0;
+ }
+
+ case CTDB_CONTROL_STATISTICS: {
+ CHECK_CONTROL_DATA_SIZE(0);
+ ctdb->statistics.memory_used = talloc_total_size(ctdb);
+ ctdb->statistics.frozen = (ctdb->freeze_mode == CTDB_FREEZE_FROZEN);
+ ctdb->statistics.recovering = (ctdb->recovery_mode == CTDB_RECOVERY_ACTIVE);
+ outdata->dptr = (uint8_t *)&ctdb->statistics;
+ outdata->dsize = sizeof(ctdb->statistics);
+ return 0;
+ }
+
+ case CTDB_CONTROL_GET_ALL_TUNABLES: {
+ CHECK_CONTROL_DATA_SIZE(0);
+ outdata->dptr = (uint8_t *)&ctdb->tunable;
+ outdata->dsize = sizeof(ctdb->tunable);
+ return 0;
+ }
+
+ case CTDB_CONTROL_DUMP_MEMORY: {
+ CHECK_CONTROL_DATA_SIZE(0);
+ talloc_report_full(ctdb, stdout);
+ return 0;
+ }
+
+ case CTDB_CONTROL_STATISTICS_RESET: {
+ CHECK_CONTROL_DATA_SIZE(0);
+ ZERO_STRUCT(ctdb->statistics);
+ return 0;
+ }
+
+ case CTDB_CONTROL_GETVNNMAP:
+ return ctdb_control_getvnnmap(ctdb, opcode, indata, outdata);
+
+ case CTDB_CONTROL_GET_DBMAP:
+ return ctdb_control_getdbmap(ctdb, opcode, indata, outdata);
+
+ case CTDB_CONTROL_GET_NODEMAP:
+ return ctdb_control_getnodemap(ctdb, opcode, indata, outdata);
+
+ case CTDB_CONTROL_SETVNNMAP:
+ return ctdb_control_setvnnmap(ctdb, opcode, indata, outdata);
+
+ case CTDB_CONTROL_PULL_DB:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_pulldb));
+ return ctdb_control_pull_db(ctdb, indata, outdata);
+
+ case CTDB_CONTROL_SET_DMASTER:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_dmaster));
+ return ctdb_control_set_dmaster(ctdb, indata);
+
+ case CTDB_CONTROL_PUSH_DB:
+ return ctdb_control_push_db(ctdb, indata);
+
+ case CTDB_CONTROL_GET_RECMODE: {
+ return ctdb->recovery_mode;
+ }
+
+ case CTDB_CONTROL_SET_RECMASTER: {
+ CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("Attempt to set recmaster when not frozen\n"));
+ return -1;
+ }
+ ctdb->recovery_master = ((uint32_t *)(&indata.dptr[0]))[0];
+ return 0;
+ }
+
+ case CTDB_CONTROL_GET_RECMASTER:
+ return ctdb->recovery_master;
+
+ case CTDB_CONTROL_GET_PID:
+ return getpid();
+
+ case CTDB_CONTROL_GET_VNN:
+ return ctdb->vnn;
+
+ case CTDB_CONTROL_PING:
+ CHECK_CONTROL_DATA_SIZE(0);
+ return ctdb->statistics.num_clients;
+
+ case CTDB_CONTROL_GET_DBNAME: {
+ uint32_t db_id;
+ struct ctdb_db_context *ctdb_db;
+
+ CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
+ db_id = *(uint32_t *)indata.dptr;
+ ctdb_db = find_ctdb_db(ctdb, db_id);
+ if (ctdb_db == NULL) return -1;
+ outdata->dptr = discard_const(ctdb_db->db_name);
+ outdata->dsize = strlen(ctdb_db->db_name)+1;
+ return 0;
+ }
+
+ case CTDB_CONTROL_GETDBPATH: {
+ uint32_t db_id;
+ struct ctdb_db_context *ctdb_db;
+
+ CHECK_CONTROL_DATA_SIZE(sizeof(db_id));
+ db_id = *(uint32_t *)indata.dptr;
+ ctdb_db = find_ctdb_db(ctdb, db_id);
+ if (ctdb_db == NULL) return -1;
+ outdata->dptr = discard_const(ctdb_db->db_path);
+ outdata->dsize = strlen(ctdb_db->db_path)+1;
+ return 0;
+ }
+
+ case CTDB_CONTROL_DB_ATTACH:
+ return ctdb_control_db_attach(ctdb, indata, outdata);
+
+ case CTDB_CONTROL_SET_CALL: {
+ struct ctdb_control_set_call *sc =
+ (struct ctdb_control_set_call *)indata.dptr;
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_call));
+ return ctdb_daemon_set_call(ctdb, sc->db_id, sc->fn, sc->id);
+ }
+
+ case CTDB_CONTROL_TRAVERSE_START:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_traverse_start));
+ return ctdb_control_traverse_start(ctdb, indata, outdata, srcnode);
+
+ case CTDB_CONTROL_TRAVERSE_ALL:
+ return ctdb_control_traverse_all(ctdb, indata, outdata);
+
+ case CTDB_CONTROL_TRAVERSE_DATA:
+ return ctdb_control_traverse_data(ctdb, indata, outdata);
+
+ case CTDB_CONTROL_REGISTER_SRVID:
+ return daemon_register_message_handler(ctdb, client_id, srvid);
+
+ case CTDB_CONTROL_DEREGISTER_SRVID:
+ return daemon_deregister_message_handler(ctdb, client_id, srvid);
+
+ case CTDB_CONTROL_ENABLE_SEQNUM:
+ CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
+ return ctdb_ltdb_enable_seqnum(ctdb, *(uint32_t *)indata.dptr);
+
+ case CTDB_CONTROL_UPDATE_SEQNUM:
+ CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
+ return ctdb_ltdb_update_seqnum(ctdb, *(uint32_t *)indata.dptr, srcnode);
+
+ case CTDB_CONTROL_FREEZE:
+ CHECK_CONTROL_DATA_SIZE(0);
+ return ctdb_control_freeze(ctdb, c, async_reply);
+
+ case CTDB_CONTROL_THAW:
+ CHECK_CONTROL_DATA_SIZE(0);
+ return ctdb_control_thaw(ctdb);
+
+ case CTDB_CONTROL_SET_RECMODE:
+ CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
+ return ctdb_control_set_recmode(ctdb, c, indata, async_reply, errormsg);
+
+ case CTDB_CONTROL_SET_MONMODE:
+ CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
+ ctdb->monitoring_mode = *(uint32_t *)indata.dptr;
+ return 0;
+
+ case CTDB_CONTROL_GET_MONMODE:
+ return ctdb->monitoring_mode;
+
+ case CTDB_CONTROL_SHUTDOWN:
+ ctdb_release_all_ips(ctdb);
+ ctdb->methods->shutdown(ctdb);
+ ctdb_event_script(ctdb, "shutdown");
+ DEBUG(0,("shutting down\n"));
+ exit(0);
+
+ case CTDB_CONTROL_MAX_RSN:
+ CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
+ return ctdb_control_max_rsn(ctdb, indata, outdata);
+
+ case CTDB_CONTROL_SET_RSN_NONEMPTY:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_set_rsn_nonempty));
+ return ctdb_control_set_rsn_nonempty(ctdb, indata, outdata);
+
+ case CTDB_CONTROL_TAKEOVER_IP:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
+ return ctdb_control_takeover_ip(ctdb, c, indata, async_reply);
+
+ case CTDB_CONTROL_RELEASE_IP:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_public_ip));
+ return ctdb_control_release_ip(ctdb, c, indata, async_reply);
+
+ case CTDB_CONTROL_GET_PUBLIC_IPS:
+ CHECK_CONTROL_DATA_SIZE(0);
+ return ctdb_control_get_public_ips(ctdb, c, outdata);
+
+ case CTDB_CONTROL_DELETE_LOW_RSN:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_delete_low_rsn));
+ return ctdb_control_delete_low_rsn(ctdb, indata, outdata);
+
+ case CTDB_CONTROL_TCP_CLIENT:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_tcp));
+ return ctdb_control_tcp_client(ctdb, client_id, srcnode, indata);
+
+ case CTDB_CONTROL_STARTUP:
+ CHECK_CONTROL_DATA_SIZE(0);
+ return ctdb_control_startup(ctdb, srcnode);
+
+ case CTDB_CONTROL_TCP_ADD:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_tcp_vnn));
+ return ctdb_control_tcp_add(ctdb, indata);
+
+ case CTDB_CONTROL_TCP_REMOVE:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_control_tcp_vnn));
+ return ctdb_control_tcp_remove(ctdb, indata);
+
+ case CTDB_CONTROL_SET_TUNABLE:
+ return ctdb_control_set_tunable(ctdb, indata);
+
+ case CTDB_CONTROL_GET_TUNABLE:
+ return ctdb_control_get_tunable(ctdb, indata, outdata);
+
+ case CTDB_CONTROL_LIST_TUNABLES:
+ return ctdb_control_list_tunables(ctdb, outdata);
+
+ case CTDB_CONTROL_MODIFY_FLAGS:
+ CHECK_CONTROL_DATA_SIZE(sizeof(struct ctdb_node_modflags));
+ return ctdb_control_modflags(ctdb, indata);
+
+ default:
+ DEBUG(0,(__location__ " Unknown CTDB control opcode %u\n", opcode));
+ return -1;
+ }
+}
+
+
+/*
+ send a reply for a ctdb control
+ */
+void ctdb_request_control_reply(struct ctdb_context *ctdb, struct ctdb_req_control *c,
+ TDB_DATA *outdata, int32_t status, const char *errormsg)
+{
+ struct ctdb_reply_control *r;
+ size_t len;
+
+ /* some controls send no reply */
+ if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
+ return;
+ }
+
+ len = offsetof(struct ctdb_reply_control, data) + (outdata?outdata->dsize:0);
+ if (errormsg) {
+ len += strlen(errormsg);
+ }
+ r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REPLY_CONTROL, len, struct ctdb_reply_control);
+ CTDB_NO_MEMORY_VOID(ctdb, r);
+
+ r->hdr.destnode = c->hdr.srcnode;
+ r->hdr.reqid = c->hdr.reqid;
+ r->status = status;
+ r->datalen = outdata?outdata->dsize:0;
+ if (outdata && outdata->dsize) {
+ memcpy(&r->data[0], outdata->dptr, outdata->dsize);
+ }
+ if (errormsg) {
+ r->errorlen = strlen(errormsg);
+ memcpy(&r->data[r->datalen], errormsg, r->errorlen);
+ }
+
+ ctdb_queue_packet(ctdb, &r->hdr);
+
+ talloc_free(r);
+}
+
+/*
+ called when a CTDB_REQ_CONTROL packet comes in
+*/
+void ctdb_request_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
+{
+ struct ctdb_req_control *c = (struct ctdb_req_control *)hdr;
+ TDB_DATA data, *outdata;
+ int32_t status;
+ bool async_reply = False;
+ const char *errormsg = NULL;
+
+ data.dptr = &c->data[0];
+ data.dsize = c->datalen;
+
+ outdata = talloc_zero(c, TDB_DATA);
+
+ status = ctdb_control_dispatch(ctdb, c, data, outdata, hdr->srcnode,
+ &errormsg, &async_reply);
+
+ if (!async_reply) {
+ ctdb_request_control_reply(ctdb, c, outdata, status, errormsg);
+ }
+}
+
+/*
+ called when a CTDB_REPLY_CONTROL packet comes in
+*/
+void ctdb_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
+{
+ struct ctdb_reply_control *c = (struct ctdb_reply_control *)hdr;
+ TDB_DATA data;
+ struct ctdb_control_state *state;
+ const char *errormsg = NULL;
+
+ state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_control_state);
+ if (state == NULL) {
+ DEBUG(0,("vnn %u Invalid reqid %u in ctdb_reply_control\n",
+ ctdb->vnn, hdr->reqid));
+ return;
+ }
+
+ if (hdr->reqid != state->reqid) {
+ /* we found a record but it was the wrong one */
+ DEBUG(0, ("Dropped orphaned control reply with reqid:%u\n", hdr->reqid));
+ return;
+ }
+
+ data.dptr = &c->data[0];
+ data.dsize = c->datalen;
+ if (c->errorlen) {
+ errormsg = talloc_strndup(state,
+ (char *)&c->data[c->datalen], c->errorlen);
+ }
+
+ /* make state a child of the packet, so it goes away when the packet
+ is freed. */
+ talloc_steal(hdr, state);
+
+ state->callback(ctdb, c->status, data, errormsg, state->private_data);
+}
+
+static int ctdb_control_destructor(struct ctdb_control_state *state)
+{
+ ctdb_reqid_remove(state->ctdb, state->reqid);
+ return 0;
+}
+
+/*
+ handle a timeout of a control
+ */
+static void ctdb_control_timeout(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *private_data)
+{
+ struct ctdb_control_state *state = talloc_get_type(private_data, struct ctdb_control_state);
+ TALLOC_CTX *tmp_ctx = talloc_new(ev);
+
+ state->ctdb->statistics.timeouts.control++;
+
+ talloc_steal(tmp_ctx, state);
+
+ state->callback(state->ctdb, -1, tdb_null,
+ "ctdb_control timed out",
+ state->private_data);
+ talloc_free(tmp_ctx);
+}
+
+
+/*
+ send a control message to a node
+ */
+int ctdb_daemon_send_control(struct ctdb_context *ctdb, uint32_t destnode,
+ uint64_t srvid, uint32_t opcode, uint32_t client_id,
+ uint32_t flags,
+ TDB_DATA data,
+ ctdb_control_callback_fn_t callback,
+ void *private_data)
+{
+ struct ctdb_req_control *c;
+ struct ctdb_control_state *state;
+ size_t len;
+
+ if (((destnode == CTDB_BROADCAST_VNNMAP) ||
+ (destnode == CTDB_BROADCAST_ALL) ||
+ (destnode == CTDB_BROADCAST_CONNECTED)) &&
+ !(flags & CTDB_CTRL_FLAG_NOREPLY)) {
+ DEBUG(0,("Attempt to broadcast control without NOREPLY\n"));
+ return -1;
+ }
+
+ if (destnode != CTDB_BROADCAST_VNNMAP &&
+ destnode != CTDB_BROADCAST_ALL &&
+ destnode != CTDB_BROADCAST_CONNECTED &&
+ (!ctdb_validate_vnn(ctdb, destnode) ||
+ (ctdb->nodes[destnode]->flags & NODE_FLAGS_DISCONNECTED))) {
+ if (!(flags & CTDB_CTRL_FLAG_NOREPLY)) {
+ callback(ctdb, -1, tdb_null, "ctdb_control to disconnected node", private_data);
+ }
+ return 0;
+ }
+
+ /* the state is made a child of private_data if possible. This means any reply
+ will be discarded if the private_data goes away */
+ state = talloc(private_data?private_data:ctdb, struct ctdb_control_state);
+ CTDB_NO_MEMORY(ctdb, state);
+
+ state->reqid = ctdb_reqid_new(ctdb, state);
+ state->callback = callback;
+ state->private_data = private_data;
+ state->ctdb = ctdb;
+ state->flags = flags;
+
+ talloc_set_destructor(state, ctdb_control_destructor);
+
+ len = offsetof(struct ctdb_req_control, data) + data.dsize;
+ c = ctdb_transport_allocate(ctdb, state, CTDB_REQ_CONTROL, len,
+ struct ctdb_req_control);
+ CTDB_NO_MEMORY(ctdb, c);
+ talloc_set_name_const(c, "ctdb_req_control packet");
+
+ c->hdr.destnode = destnode;
+ c->hdr.reqid = state->reqid;
+ c->opcode = opcode;
+ c->client_id = client_id;
+ c->flags = flags;
+ c->srvid = srvid;
+ c->datalen = data.dsize;
+ if (data.dsize) {
+ memcpy(&c->data[0], data.dptr, data.dsize);
+ }
+
+ ctdb_queue_packet(ctdb, &c->hdr);
+
+ if (flags & CTDB_CTRL_FLAG_NOREPLY) {
+ talloc_free(state);
+ return 0;
+ }
+
+ if (ctdb->tunable.control_timeout) {
+ event_add_timed(ctdb->ev, state,
+ timeval_current_ofs(ctdb->tunable.control_timeout, 0),
+ ctdb_control_timeout, state);
+ }
+
+ talloc_free(c);
+ return 0;
+}
diff --git a/source4/cluster/ctdb/server/ctdb_daemon.c b/source4/cluster/ctdb/server/ctdb_daemon.c
new file mode 100644
index 0000000000..2577970075
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_daemon.c
@@ -0,0 +1,927 @@
+/*
+ ctdb daemon code
+
+ Copyright (C) Andrew Tridgell 2006
+
+ 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 "db_wrap.h"
+#include "lib/tdb/include/tdb.h"
+#include "lib/events/events.h"
+#include "lib/util/dlinklist.h"
+#include "system/network.h"
+#include "system/filesys.h"
+#include "system/wait.h"
+#include "../include/ctdb.h"
+#include "../include/ctdb_private.h"
+
+static void daemon_incoming_packet(void *, struct ctdb_req_header *);
+
+/*
+ handler for when a node changes its flags
+*/
+static void flag_change_handler(struct ctdb_context *ctdb, uint64_t srvid,
+ TDB_DATA data, void *private_data)
+{
+ struct ctdb_node_flag_change *c = (struct ctdb_node_flag_change *)data.dptr;
+
+ if (data.dsize != sizeof(*c) || !ctdb_validate_vnn(ctdb, c->vnn)) {
+ DEBUG(0,(__location__ "Invalid data in ctdb_node_flag_change\n"));
+ return;
+ }
+
+ if (!ctdb_validate_vnn(ctdb, c->vnn)) {
+ DEBUG(0,("Bad vnn %u in flag_change_handler\n", c->vnn));
+ return;
+ }
+
+ /* don't get the disconnected flag from the other node */
+ ctdb->nodes[c->vnn]->flags =
+ (ctdb->nodes[c->vnn]->flags&NODE_FLAGS_DISCONNECTED)
+ | (c->flags & ~NODE_FLAGS_DISCONNECTED);
+ DEBUG(2,("Node flags for node %u are now 0x%x\n", c->vnn, ctdb->nodes[c->vnn]->flags));
+
+ /* make sure we don't hold any IPs when we shouldn't */
+ if (c->vnn == ctdb->vnn &&
+ (ctdb->nodes[c->vnn]->flags & (NODE_FLAGS_INACTIVE|NODE_FLAGS_BANNED))) {
+ ctdb_release_all_ips(ctdb);
+ }
+}
+
+/* called when the "startup" event script has finished */
+static void ctdb_start_transport(struct ctdb_context *ctdb, int status, void *p)
+{
+ if (status != 0) {
+ DEBUG(0,("startup event failed!\n"));
+ ctdb_fatal(ctdb, "startup event script failed");
+ }
+
+ /* start the transport running */
+ if (ctdb->methods->start(ctdb) != 0) {
+ DEBUG(0,("transport failed to start!\n"));
+ ctdb_fatal(ctdb, "transport failed to start");
+ }
+
+ /* start the recovery daemon process */
+ if (ctdb_start_recoverd(ctdb) != 0) {
+ DEBUG(0,("Failed to start recovery daemon\n"));
+ exit(11);
+ }
+
+ /* a handler for when nodes are disabled/enabled */
+ ctdb_register_message_handler(ctdb, ctdb, CTDB_SRVID_NODE_FLAGS_CHANGED,
+ flag_change_handler, NULL);
+
+ /* start monitoring for dead nodes */
+ ctdb_start_monitoring(ctdb);
+}
+
+/* go into main ctdb loop */
+static void ctdb_main_loop(struct ctdb_context *ctdb)
+{
+ int ret = -1;
+
+ if (strcmp(ctdb->transport, "tcp") == 0) {
+ int ctdb_tcp_init(struct ctdb_context *);
+ ret = ctdb_tcp_init(ctdb);
+ }
+#ifdef USE_INFINIBAND
+ if (strcmp(ctdb->transport, "ib") == 0) {
+ int ctdb_ibw_init(struct ctdb_context *);
+ ret = ctdb_ibw_init(ctdb);
+ }
+#endif
+ if (ret != 0) {
+ DEBUG(0,("Failed to initialise transport '%s'\n", ctdb->transport));
+ return;
+ }
+
+ /* initialise the transport */
+ if (ctdb->methods->initialise(ctdb) != 0) {
+ DEBUG(0,("transport failed to initialise!\n"));
+ ctdb_fatal(ctdb, "transport failed to initialise");
+ }
+
+ /* tell all other nodes we've just started up */
+ ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_ALL,
+ 0, CTDB_CONTROL_STARTUP, 0,
+ CTDB_CTRL_FLAG_NOREPLY,
+ tdb_null, NULL, NULL);
+
+ /* release any IPs we hold from previous runs of the daemon */
+ ctdb_release_all_ips(ctdb);
+
+ ret = ctdb_event_script_callback(ctdb, timeval_zero(), ctdb,
+ ctdb_start_transport, NULL, "startup");
+ if (ret != 0) {
+ DEBUG(0,("Failed startup event script\n"));
+ return;
+ }
+
+ /* go into a wait loop to allow other nodes to complete */
+ event_loop_wait(ctdb->ev);
+
+ DEBUG(0,("event_loop_wait() returned. this should not happen\n"));
+ exit(1);
+}
+
+
+static void block_signal(int signum)
+{
+ struct sigaction act;
+
+ memset(&act, 0, sizeof(act));
+
+ act.sa_handler = SIG_IGN;
+ sigemptyset(&act.sa_mask);
+ sigaddset(&act.sa_mask, signum);
+ sigaction(signum, &act, NULL);
+}
+
+
+/*
+ send a packet to a client
+ */
+static int daemon_queue_send(struct ctdb_client *client, struct ctdb_req_header *hdr)
+{
+ client->ctdb->statistics.client_packets_sent++;
+ return ctdb_queue_send(client->queue, (uint8_t *)hdr, hdr->length);
+}
+
+/*
+ message handler for when we are in daemon mode. This redirects the message
+ to the right client
+ */
+static void daemon_message_handler(struct ctdb_context *ctdb, uint64_t srvid,
+ TDB_DATA data, void *private_data)
+{
+ struct ctdb_client *client = talloc_get_type(private_data, struct ctdb_client);
+ struct ctdb_req_message *r;
+ int len;
+
+ /* construct a message to send to the client containing the data */
+ len = offsetof(struct ctdb_req_message, data) + data.dsize;
+ r = ctdbd_allocate_pkt(ctdb, ctdb, CTDB_REQ_MESSAGE,
+ len, struct ctdb_req_message);
+ CTDB_NO_MEMORY_VOID(ctdb, r);
+
+ talloc_set_name_const(r, "req_message packet");
+
+ r->srvid = srvid;
+ r->datalen = data.dsize;
+ memcpy(&r->data[0], data.dptr, data.dsize);
+
+ daemon_queue_send(client, &r->hdr);
+
+ talloc_free(r);
+}
+
+
+/*
+ this is called when the ctdb daemon received a ctdb request to
+ set the srvid from the client
+ */
+int daemon_register_message_handler(struct ctdb_context *ctdb, uint32_t client_id, uint64_t srvid)
+{
+ struct ctdb_client *client = ctdb_reqid_find(ctdb, client_id, struct ctdb_client);
+ int res;
+ if (client == NULL) {
+ DEBUG(0,("Bad client_id in daemon_request_register_message_handler\n"));
+ return -1;
+ }
+ res = ctdb_register_message_handler(ctdb, client, srvid, daemon_message_handler, client);
+ if (res != 0) {
+ DEBUG(0,(__location__ " Failed to register handler %llu in daemon\n",
+ (unsigned long long)srvid));
+ } else {
+ DEBUG(2,(__location__ " Registered message handler for srvid=%llu\n",
+ (unsigned long long)srvid));
+ }
+
+ /* this is a hack for Samba - we now know the pid of the Samba client */
+ if ((srvid & 0xFFFFFFFF) == srvid &&
+ kill(srvid, 0) == 0) {
+ client->pid = srvid;
+ DEBUG(0,(__location__ " Registered PID %u for client %u\n",
+ (unsigned)client->pid, client_id));
+ }
+ return res;
+}
+
+/*
+ this is called when the ctdb daemon received a ctdb request to
+ remove a srvid from the client
+ */
+int daemon_deregister_message_handler(struct ctdb_context *ctdb, uint32_t client_id, uint64_t srvid)
+{
+ struct ctdb_client *client = ctdb_reqid_find(ctdb, client_id, struct ctdb_client);
+ if (client == NULL) {
+ DEBUG(0,("Bad client_id in daemon_request_deregister_message_handler\n"));
+ return -1;
+ }
+ return ctdb_deregister_message_handler(ctdb, srvid, client);
+}
+
+
+/*
+ destroy a ctdb_client
+*/
+static int ctdb_client_destructor(struct ctdb_client *client)
+{
+ ctdb_takeover_client_destructor_hook(client);
+ ctdb_reqid_remove(client->ctdb, client->client_id);
+ client->ctdb->statistics.num_clients--;
+ return 0;
+}
+
+
+/*
+ this is called when the ctdb daemon received a ctdb request message
+ from a local client over the unix domain socket
+ */
+static void daemon_request_message_from_client(struct ctdb_client *client,
+ struct ctdb_req_message *c)
+{
+ TDB_DATA data;
+ int res;
+
+ /* maybe the message is for another client on this node */
+ if (ctdb_get_vnn(client->ctdb)==c->hdr.destnode) {
+ ctdb_request_message(client->ctdb, (struct ctdb_req_header *)c);
+ return;
+ }
+
+ /* its for a remote node */
+ data.dptr = &c->data[0];
+ data.dsize = c->datalen;
+ res = ctdb_daemon_send_message(client->ctdb, c->hdr.destnode,
+ c->srvid, data);
+ if (res != 0) {
+ DEBUG(0,(__location__ " Failed to send message to remote node %u\n",
+ c->hdr.destnode));
+ }
+}
+
+
+struct daemon_call_state {
+ struct ctdb_client *client;
+ uint32_t reqid;
+ struct ctdb_call *call;
+ struct timeval start_time;
+};
+
+/*
+ complete a call from a client
+*/
+static void daemon_call_from_client_callback(struct ctdb_call_state *state)
+{
+ struct daemon_call_state *dstate = talloc_get_type(state->async.private_data,
+ struct daemon_call_state);
+ struct ctdb_reply_call *r;
+ int res;
+ uint32_t length;
+ struct ctdb_client *client = dstate->client;
+
+ talloc_steal(client, dstate);
+ talloc_steal(dstate, dstate->call);
+
+ res = ctdb_daemon_call_recv(state, dstate->call);
+ if (res != 0) {
+ DEBUG(0, (__location__ " ctdbd_call_recv() returned error\n"));
+ client->ctdb->statistics.pending_calls--;
+ ctdb_latency(&client->ctdb->statistics.max_call_latency, dstate->start_time);
+ return;
+ }
+
+ length = offsetof(struct ctdb_reply_call, data) + dstate->call->reply_data.dsize;
+ r = ctdbd_allocate_pkt(client->ctdb, dstate, CTDB_REPLY_CALL,
+ length, struct ctdb_reply_call);
+ if (r == NULL) {
+ DEBUG(0, (__location__ " Failed to allocate reply_call in ctdb daemon\n"));
+ client->ctdb->statistics.pending_calls--;
+ ctdb_latency(&client->ctdb->statistics.max_call_latency, dstate->start_time);
+ return;
+ }
+ r->hdr.reqid = dstate->reqid;
+ r->datalen = dstate->call->reply_data.dsize;
+ memcpy(&r->data[0], dstate->call->reply_data.dptr, r->datalen);
+
+ res = daemon_queue_send(client, &r->hdr);
+ if (res != 0) {
+ DEBUG(0, (__location__ " Failed to queue packet from daemon to client\n"));
+ }
+ ctdb_latency(&client->ctdb->statistics.max_call_latency, dstate->start_time);
+ talloc_free(dstate);
+ client->ctdb->statistics.pending_calls--;
+}
+
+
+static void daemon_request_call_from_client(struct ctdb_client *client,
+ struct ctdb_req_call *c);
+
+/*
+ this is called when the ctdb daemon received a ctdb request call
+ from a local client over the unix domain socket
+ */
+static void daemon_request_call_from_client(struct ctdb_client *client,
+ struct ctdb_req_call *c)
+{
+ struct ctdb_call_state *state;
+ struct ctdb_db_context *ctdb_db;
+ struct daemon_call_state *dstate;
+ struct ctdb_call *call;
+ struct ctdb_ltdb_header header;
+ TDB_DATA key, data;
+ int ret;
+ struct ctdb_context *ctdb = client->ctdb;
+
+ ctdb->statistics.total_calls++;
+ ctdb->statistics.pending_calls++;
+
+ ctdb_db = find_ctdb_db(client->ctdb, c->db_id);
+ if (!ctdb_db) {
+ DEBUG(0, (__location__ " Unknown database in request. db_id==0x%08x",
+ c->db_id));
+ ctdb->statistics.pending_calls--;
+ return;
+ }
+
+ key.dptr = c->data;
+ key.dsize = c->keylen;
+
+ ret = ctdb_ltdb_lock_fetch_requeue(ctdb_db, key, &header,
+ (struct ctdb_req_header *)c, &data,
+ daemon_incoming_packet, client, True);
+ if (ret == -2) {
+ /* will retry later */
+ ctdb->statistics.pending_calls--;
+ return;
+ }
+
+ if (ret != 0) {
+ DEBUG(0,(__location__ " Unable to fetch record\n"));
+ ctdb->statistics.pending_calls--;
+ return;
+ }
+
+ dstate = talloc(client, struct daemon_call_state);
+ if (dstate == NULL) {
+ ctdb_ltdb_unlock(ctdb_db, key);
+ DEBUG(0,(__location__ " Unable to allocate dstate\n"));
+ ctdb->statistics.pending_calls--;
+ return;
+ }
+ dstate->start_time = timeval_current();
+ dstate->client = client;
+ dstate->reqid = c->hdr.reqid;
+ talloc_steal(dstate, data.dptr);
+
+ call = dstate->call = talloc_zero(dstate, struct ctdb_call);
+ if (call == NULL) {
+ ctdb_ltdb_unlock(ctdb_db, key);
+ DEBUG(0,(__location__ " Unable to allocate call\n"));
+ ctdb->statistics.pending_calls--;
+ ctdb_latency(&ctdb->statistics.max_call_latency, dstate->start_time);
+ return;
+ }
+
+ call->call_id = c->callid;
+ call->key = key;
+ call->call_data.dptr = c->data + c->keylen;
+ call->call_data.dsize = c->calldatalen;
+ call->flags = c->flags;
+
+ if (header.dmaster == ctdb->vnn) {
+ state = ctdb_call_local_send(ctdb_db, call, &header, &data);
+ } else {
+ state = ctdb_daemon_call_send_remote(ctdb_db, call, &header);
+ }
+
+ ctdb_ltdb_unlock(ctdb_db, key);
+
+ if (state == NULL) {
+ DEBUG(0,(__location__ " Unable to setup call send\n"));
+ ctdb->statistics.pending_calls--;
+ ctdb_latency(&ctdb->statistics.max_call_latency, dstate->start_time);
+ return;
+ }
+ talloc_steal(state, dstate);
+ talloc_steal(client, state);
+
+ state->async.fn = daemon_call_from_client_callback;
+ state->async.private_data = dstate;
+}
+
+
+static void daemon_request_control_from_client(struct ctdb_client *client,
+ struct ctdb_req_control *c);
+
+/* data contains a packet from the client */
+static void daemon_incoming_packet(void *p, struct ctdb_req_header *hdr)
+{
+ struct ctdb_client *client = talloc_get_type(p, struct ctdb_client);
+ TALLOC_CTX *tmp_ctx;
+ struct ctdb_context *ctdb = client->ctdb;
+
+ /* place the packet as a child of a tmp_ctx. We then use
+ talloc_free() below to free it. If any of the calls want
+ to keep it, then they will steal it somewhere else, and the
+ talloc_free() will be a no-op */
+ tmp_ctx = talloc_new(client);
+ talloc_steal(tmp_ctx, hdr);
+
+ if (hdr->ctdb_magic != CTDB_MAGIC) {
+ ctdb_set_error(client->ctdb, "Non CTDB packet rejected in daemon\n");
+ goto done;
+ }
+
+ if (hdr->ctdb_version != CTDB_VERSION) {
+ ctdb_set_error(client->ctdb, "Bad CTDB version 0x%x rejected in daemon\n", hdr->ctdb_version);
+ goto done;
+ }
+
+ switch (hdr->operation) {
+ case CTDB_REQ_CALL:
+ ctdb->statistics.client.req_call++;
+ daemon_request_call_from_client(client, (struct ctdb_req_call *)hdr);
+ break;
+
+ case CTDB_REQ_MESSAGE:
+ ctdb->statistics.client.req_message++;
+ daemon_request_message_from_client(client, (struct ctdb_req_message *)hdr);
+ break;
+
+ case CTDB_REQ_CONTROL:
+ ctdb->statistics.client.req_control++;
+ daemon_request_control_from_client(client, (struct ctdb_req_control *)hdr);
+ break;
+
+ default:
+ DEBUG(0,(__location__ " daemon: unrecognized operation %u\n",
+ hdr->operation));
+ }
+
+done:
+ talloc_free(tmp_ctx);
+}
+
+/*
+ called when the daemon gets a incoming packet
+ */
+static void ctdb_daemon_read_cb(uint8_t *data, size_t cnt, void *args)
+{
+ struct ctdb_client *client = talloc_get_type(args, struct ctdb_client);
+ struct ctdb_req_header *hdr;
+
+ if (cnt == 0) {
+ talloc_free(client);
+ return;
+ }
+
+ client->ctdb->statistics.client_packets_recv++;
+
+ if (cnt < sizeof(*hdr)) {
+ ctdb_set_error(client->ctdb, "Bad packet length %u in daemon\n",
+ (unsigned)cnt);
+ return;
+ }
+ hdr = (struct ctdb_req_header *)data;
+ if (cnt != hdr->length) {
+ ctdb_set_error(client->ctdb, "Bad header length %u expected %u\n in daemon",
+ (unsigned)hdr->length, (unsigned)cnt);
+ return;
+ }
+
+ if (hdr->ctdb_magic != CTDB_MAGIC) {
+ ctdb_set_error(client->ctdb, "Non CTDB packet rejected\n");
+ return;
+ }
+
+ if (hdr->ctdb_version != CTDB_VERSION) {
+ ctdb_set_error(client->ctdb, "Bad CTDB version 0x%x rejected in daemon\n", hdr->ctdb_version);
+ return;
+ }
+
+ DEBUG(3,(__location__ " client request %u of type %u length %u from "
+ "node %u to %u\n", hdr->reqid, hdr->operation, hdr->length,
+ hdr->srcnode, hdr->destnode));
+
+ /* it is the responsibility of the incoming packet function to free 'data' */
+ daemon_incoming_packet(client, hdr);
+}
+
+static void ctdb_accept_client(struct event_context *ev, struct fd_event *fde,
+ uint16_t flags, void *private_data)
+{
+ struct sockaddr_in addr;
+ socklen_t len;
+ int fd;
+ struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
+ struct ctdb_client *client;
+
+ memset(&addr, 0, sizeof(addr));
+ len = sizeof(addr);
+ fd = accept(ctdb->daemon.sd, (struct sockaddr *)&addr, &len);
+ if (fd == -1) {
+ return;
+ }
+
+ set_nonblocking(fd);
+ set_close_on_exec(fd);
+
+ client = talloc_zero(ctdb, struct ctdb_client);
+ client->ctdb = ctdb;
+ client->fd = fd;
+ client->client_id = ctdb_reqid_new(ctdb, client);
+ ctdb->statistics.num_clients++;
+
+ client->queue = ctdb_queue_setup(ctdb, client, fd, CTDB_DS_ALIGNMENT,
+ ctdb_daemon_read_cb, client);
+
+ talloc_set_destructor(client, ctdb_client_destructor);
+}
+
+
+
+/*
+ create a unix domain socket and bind it
+ return a file descriptor open on the socket
+*/
+static int ux_socket_bind(struct ctdb_context *ctdb)
+{
+ struct sockaddr_un addr;
+
+ ctdb->daemon.sd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (ctdb->daemon.sd == -1) {
+ return -1;
+ }
+
+ set_nonblocking(ctdb->daemon.sd);
+ set_close_on_exec(ctdb->daemon.sd);
+
+#if 0
+ /* AIX doesn't like this :( */
+ if (fchown(ctdb->daemon.sd, geteuid(), getegid()) != 0 ||
+ fchmod(ctdb->daemon.sd, 0700) != 0) {
+ DEBUG(0,("Unable to secure ctdb socket '%s', ctdb->daemon.name\n"));
+ goto failed;
+ }
+#endif
+
+ set_nonblocking(ctdb->daemon.sd);
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, ctdb->daemon.name, sizeof(addr.sun_path));
+
+ if (bind(ctdb->daemon.sd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
+ DEBUG(0,("Unable to bind on ctdb socket '%s'\n", ctdb->daemon.name));
+ goto failed;
+ }
+ if (listen(ctdb->daemon.sd, 10) != 0) {
+ DEBUG(0,("Unable to listen on ctdb socket '%s'\n", ctdb->daemon.name));
+ goto failed;
+ }
+
+ return 0;
+
+failed:
+ close(ctdb->daemon.sd);
+ ctdb->daemon.sd = -1;
+ return -1;
+}
+
+/*
+ delete the socket on exit - called on destruction of autofree context
+ */
+static int unlink_destructor(const char *name)
+{
+ unlink(name);
+ return 0;
+}
+
+
+/*
+ start the protocol going as a daemon
+*/
+int ctdb_start_daemon(struct ctdb_context *ctdb, bool do_fork)
+{
+ int res;
+ struct fd_event *fde;
+ const char *domain_socket_name;
+
+ /* get rid of any old sockets */
+ unlink(ctdb->daemon.name);
+
+ /* create a unix domain stream socket to listen to */
+ res = ux_socket_bind(ctdb);
+ if (res!=0) {
+ DEBUG(0,(__location__ " Failed to open CTDB unix domain socket\n"));
+ exit(10);
+ }
+
+ if (do_fork && fork()) {
+ return 0;
+ }
+
+ tdb_reopen_all(False);
+
+ if (do_fork) {
+ setsid();
+ }
+ block_signal(SIGPIPE);
+
+ /* try to set us up as realtime */
+ ctdb_set_realtime(true);
+
+ /* ensure the socket is deleted on exit of the daemon */
+ domain_socket_name = talloc_strdup(talloc_autofree_context(), ctdb->daemon.name);
+ talloc_set_destructor(domain_socket_name, unlink_destructor);
+
+ ctdb->ev = event_context_init(NULL);
+
+ /* start frozen, then let the first election sort things out */
+ if (!ctdb_blocking_freeze(ctdb)) {
+ DEBUG(0,("Failed to get initial freeze\n"));
+ exit(12);
+ }
+
+ /* force initial recovery for election */
+ ctdb->recovery_mode = CTDB_RECOVERY_ACTIVE;
+
+ /* now start accepting clients, only can do this once frozen */
+ fde = event_add_fd(ctdb->ev, ctdb, ctdb->daemon.sd,
+ EVENT_FD_READ|EVENT_FD_AUTOCLOSE,
+ ctdb_accept_client, ctdb);
+
+ ctdb_main_loop(ctdb);
+
+ return 0;
+}
+
+/*
+ allocate a packet for use in daemon<->daemon communication
+ */
+struct ctdb_req_header *_ctdb_transport_allocate(struct ctdb_context *ctdb,
+ TALLOC_CTX *mem_ctx,
+ enum ctdb_operation operation,
+ size_t length, size_t slength,
+ const char *type)
+{
+ int size;
+ struct ctdb_req_header *hdr;
+
+ length = MAX(length, slength);
+ size = (length+(CTDB_DS_ALIGNMENT-1)) & ~(CTDB_DS_ALIGNMENT-1);
+
+ hdr = (struct ctdb_req_header *)ctdb->methods->allocate_pkt(mem_ctx, size);
+ if (hdr == NULL) {
+ DEBUG(0,("Unable to allocate transport packet for operation %u of length %u\n",
+ operation, (unsigned)length));
+ return NULL;
+ }
+ talloc_set_name_const(hdr, type);
+ memset(hdr, 0, slength);
+ hdr->length = length;
+ hdr->operation = operation;
+ hdr->ctdb_magic = CTDB_MAGIC;
+ hdr->ctdb_version = CTDB_VERSION;
+ hdr->generation = ctdb->vnn_map->generation;
+ hdr->srcnode = ctdb->vnn;
+
+ return hdr;
+}
+
+struct daemon_control_state {
+ struct daemon_control_state *next, *prev;
+ struct ctdb_client *client;
+ struct ctdb_req_control *c;
+ uint32_t reqid;
+ struct ctdb_node *node;
+};
+
+/*
+ callback when a control reply comes in
+ */
+static void daemon_control_callback(struct ctdb_context *ctdb,
+ int32_t status, TDB_DATA data,
+ const char *errormsg,
+ void *private_data)
+{
+ struct daemon_control_state *state = talloc_get_type(private_data,
+ struct daemon_control_state);
+ struct ctdb_client *client = state->client;
+ struct ctdb_reply_control *r;
+ size_t len;
+
+ /* construct a message to send to the client containing the data */
+ len = offsetof(struct ctdb_reply_control, data) + data.dsize;
+ if (errormsg) {
+ len += strlen(errormsg);
+ }
+ r = ctdbd_allocate_pkt(ctdb, state, CTDB_REPLY_CONTROL, len,
+ struct ctdb_reply_control);
+ CTDB_NO_MEMORY_VOID(ctdb, r);
+
+ r->hdr.reqid = state->reqid;
+ r->status = status;
+ r->datalen = data.dsize;
+ r->errorlen = 0;
+ memcpy(&r->data[0], data.dptr, data.dsize);
+ if (errormsg) {
+ r->errorlen = strlen(errormsg);
+ memcpy(&r->data[r->datalen], errormsg, r->errorlen);
+ }
+
+ daemon_queue_send(client, &r->hdr);
+
+ talloc_free(state);
+}
+
+/*
+ fail all pending controls to a disconnected node
+ */
+void ctdb_daemon_cancel_controls(struct ctdb_context *ctdb, struct ctdb_node *node)
+{
+ struct daemon_control_state *state;
+ while ((state = node->pending_controls)) {
+ DLIST_REMOVE(node->pending_controls, state);
+ daemon_control_callback(ctdb, (uint32_t)-1, tdb_null,
+ "node is disconnected", state);
+ }
+}
+
+/*
+ destroy a daemon_control_state
+ */
+static int daemon_control_destructor(struct daemon_control_state *state)
+{
+ if (state->node) {
+ DLIST_REMOVE(state->node->pending_controls, state);
+ }
+ return 0;
+}
+
+/*
+ this is called when the ctdb daemon received a ctdb request control
+ from a local client over the unix domain socket
+ */
+static void daemon_request_control_from_client(struct ctdb_client *client,
+ struct ctdb_req_control *c)
+{
+ TDB_DATA data;
+ int res;
+ struct daemon_control_state *state;
+ TALLOC_CTX *tmp_ctx = talloc_new(client);
+
+ if (c->hdr.destnode == CTDB_CURRENT_NODE) {
+ c->hdr.destnode = client->ctdb->vnn;
+ }
+
+ state = talloc(client, struct daemon_control_state);
+ CTDB_NO_MEMORY_VOID(client->ctdb, state);
+
+ state->client = client;
+ state->c = talloc_steal(state, c);
+ state->reqid = c->hdr.reqid;
+ if (ctdb_validate_vnn(client->ctdb, c->hdr.destnode)) {
+ state->node = client->ctdb->nodes[c->hdr.destnode];
+ DLIST_ADD(state->node->pending_controls, state);
+ } else {
+ state->node = NULL;
+ }
+
+ talloc_set_destructor(state, daemon_control_destructor);
+
+ if (c->flags & CTDB_CTRL_FLAG_NOREPLY) {
+ talloc_steal(tmp_ctx, state);
+ }
+
+ data.dptr = &c->data[0];
+ data.dsize = c->datalen;
+ res = ctdb_daemon_send_control(client->ctdb, c->hdr.destnode,
+ c->srvid, c->opcode, client->client_id,
+ c->flags,
+ data, daemon_control_callback,
+ state);
+ if (res != 0) {
+ DEBUG(0,(__location__ " Failed to send control to remote node %u\n",
+ c->hdr.destnode));
+ }
+
+ talloc_free(tmp_ctx);
+}
+
+/*
+ register a call function
+*/
+int ctdb_daemon_set_call(struct ctdb_context *ctdb, uint32_t db_id,
+ ctdb_fn_t fn, int id)
+{
+ struct ctdb_registered_call *call;
+ struct ctdb_db_context *ctdb_db;
+
+ ctdb_db = find_ctdb_db(ctdb, db_id);
+ if (ctdb_db == NULL) {
+ return -1;
+ }
+
+ call = talloc(ctdb_db, struct ctdb_registered_call);
+ call->fn = fn;
+ call->id = id;
+
+ DLIST_ADD(ctdb_db->calls, call);
+ return 0;
+}
+
+
+
+/*
+ this local messaging handler is ugly, but is needed to prevent
+ recursion in ctdb_send_message() when the destination node is the
+ same as the source node
+ */
+struct ctdb_local_message {
+ struct ctdb_context *ctdb;
+ uint64_t srvid;
+ TDB_DATA data;
+};
+
+static void ctdb_local_message_trigger(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *private_data)
+{
+ struct ctdb_local_message *m = talloc_get_type(private_data,
+ struct ctdb_local_message);
+ int res;
+
+ res = ctdb_dispatch_message(m->ctdb, m->srvid, m->data);
+ if (res != 0) {
+ DEBUG(0, (__location__ " Failed to dispatch message for srvid=%llu\n",
+ (unsigned long long)m->srvid));
+ }
+ talloc_free(m);
+}
+
+static int ctdb_local_message(struct ctdb_context *ctdb, uint64_t srvid, TDB_DATA data)
+{
+ struct ctdb_local_message *m;
+ m = talloc(ctdb, struct ctdb_local_message);
+ CTDB_NO_MEMORY(ctdb, m);
+
+ m->ctdb = ctdb;
+ m->srvid = srvid;
+ m->data = data;
+ m->data.dptr = talloc_memdup(m, m->data.dptr, m->data.dsize);
+ if (m->data.dptr == NULL) {
+ talloc_free(m);
+ return -1;
+ }
+
+ /* this needs to be done as an event to prevent recursion */
+ event_add_timed(ctdb->ev, m, timeval_zero(), ctdb_local_message_trigger, m);
+ return 0;
+}
+
+/*
+ send a ctdb message
+*/
+int ctdb_daemon_send_message(struct ctdb_context *ctdb, uint32_t vnn,
+ uint64_t srvid, TDB_DATA data)
+{
+ struct ctdb_req_message *r;
+ int len;
+
+ /* see if this is a message to ourselves */
+ if (vnn == ctdb->vnn) {
+ return ctdb_local_message(ctdb, srvid, data);
+ }
+
+ len = offsetof(struct ctdb_req_message, data) + data.dsize;
+ r = ctdb_transport_allocate(ctdb, ctdb, CTDB_REQ_MESSAGE, len,
+ struct ctdb_req_message);
+ CTDB_NO_MEMORY(ctdb, r);
+
+ r->hdr.destnode = vnn;
+ r->srvid = srvid;
+ r->datalen = data.dsize;
+ memcpy(&r->data[0], data.dptr, data.dsize);
+
+ ctdb_queue_packet(ctdb, &r->hdr);
+
+ talloc_free(r);
+ return 0;
+}
+
diff --git a/source4/cluster/ctdb/server/ctdb_freeze.c b/source4/cluster/ctdb/server/ctdb_freeze.c
new file mode 100644
index 0000000000..42ad975b53
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_freeze.c
@@ -0,0 +1,256 @@
+/*
+ ctdb freeze handling
+
+ Copyright (C) Andrew Tridgell 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 "lib/events/events.h"
+#include "lib/tdb/include/tdb.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"
+
+
+/*
+ lock all databases
+ */
+static int ctdb_lock_all_databases(struct ctdb_context *ctdb)
+{
+ struct ctdb_db_context *ctdb_db;
+ for (ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next) {
+ if (tdb_lockall(ctdb_db->ltdb->tdb) != 0) {
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*
+ a list of control requests waiting for a freeze lock child to get
+ the database locks
+ */
+struct ctdb_freeze_waiter {
+ struct ctdb_freeze_waiter *next, *prev;
+ struct ctdb_context *ctdb;
+ struct ctdb_req_control *c;
+ int32_t status;
+};
+
+/* a handle to a freeze lock child process */
+struct ctdb_freeze_handle {
+ struct ctdb_context *ctdb;
+ pid_t child;
+ int fd;
+ struct ctdb_freeze_waiter *waiters;
+};
+
+/*
+ destroy a freeze handle
+ */
+static int ctdb_freeze_handle_destructor(struct ctdb_freeze_handle *h)
+{
+ h->ctdb->freeze_mode = CTDB_FREEZE_NONE;
+ kill(h->child, SIGKILL);
+ waitpid(h->child, NULL, 0);
+ return 0;
+}
+
+/*
+ called when the child writes its status to us
+ */
+static void ctdb_freeze_lock_handler(struct event_context *ev, struct fd_event *fde,
+ uint16_t flags, void *private_data)
+{
+ struct ctdb_freeze_handle *h = talloc_get_type(private_data, struct ctdb_freeze_handle);
+ int32_t status;
+ struct ctdb_freeze_waiter *w;
+
+ if (h->ctdb->freeze_mode == CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("freeze child died - unfreezing\n"));
+ talloc_free(h);
+ return;
+ }
+
+ if (read(h->fd, &status, sizeof(status)) != sizeof(status)) {
+ DEBUG(0,("read error from freeze lock child\n"));
+ status = -1;
+ }
+
+ if (status == -1) {
+ DEBUG(0,("Failed to get locks in ctdb_freeze_child\n"));
+ /* we didn't get the locks - destroy the handle */
+ talloc_free(h);
+ return;
+ }
+
+ h->ctdb->freeze_mode = CTDB_FREEZE_FROZEN;
+
+ /* notify the waiters */
+ while ((w = h->ctdb->freeze_handle->waiters)) {
+ w->status = status;
+ DLIST_REMOVE(h->ctdb->freeze_handle->waiters, w);
+ talloc_free(w);
+ }
+}
+
+/*
+ create a child which gets locks on all the open databases, then calls the callback telling the parent
+ that it is done
+ */
+static struct ctdb_freeze_handle *ctdb_freeze_lock(struct ctdb_context *ctdb)
+{
+ struct ctdb_freeze_handle *h;
+ int fd[2];
+ struct fd_event *fde;
+
+ h = talloc_zero(ctdb, struct ctdb_freeze_handle);
+ CTDB_NO_MEMORY_VOID(ctdb, h);
+
+ h->ctdb = ctdb;
+
+ /* use socketpair() instead of pipe() so we have bi-directional fds */
+ if (socketpair(AF_UNIX, SOCK_STREAM, 0, fd) != 0) {
+ DEBUG(0,("Failed to create pipe for ctdb_freeze_lock\n"));
+ talloc_free(h);
+ return NULL;
+ }
+
+ h->child = fork();
+ if (h->child == -1) {
+ DEBUG(0,("Failed to fork child for ctdb_freeze_lock\n"));
+ talloc_free(h);
+ return NULL;
+ }
+
+ if (h->child == 0) {
+ int ret;
+ /* in the child */
+ close(fd[0]);
+ ret = ctdb_lock_all_databases(ctdb);
+ if (ret != 0) {
+ _exit(0);
+ }
+ write(fd[1], &ret, sizeof(ret));
+ /* the read here means we will die if the parent exits */
+ read(fd[1], &ret, sizeof(ret));
+ _exit(0);
+ }
+
+ talloc_set_destructor(h, ctdb_freeze_handle_destructor);
+
+ close(fd[1]);
+
+ h->fd = fd[0];
+
+ fde = event_add_fd(ctdb->ev, h, h->fd, EVENT_FD_READ|EVENT_FD_AUTOCLOSE,
+ ctdb_freeze_lock_handler, h);
+ if (fde == NULL) {
+ DEBUG(0,("Failed to setup fd event for ctdb_freeze_lock\n"));
+ close(fd[0]);
+ talloc_free(h);
+ return NULL;
+ }
+
+ return h;
+}
+
+/*
+ destroy a waiter for a freeze mode change
+ */
+static int ctdb_freeze_waiter_destructor(struct ctdb_freeze_waiter *w)
+{
+ DLIST_REMOVE(w->ctdb->freeze_handle->waiters, w);
+ ctdb_request_control_reply(w->ctdb, w->c, NULL, w->status, NULL);
+ return 0;
+}
+
+/*
+ start the freeze process
+ */
+void ctdb_start_freeze(struct ctdb_context *ctdb)
+{
+ if (ctdb->freeze_mode == CTDB_FREEZE_FROZEN) {
+ /* we're already frozen */
+ return;
+ }
+
+ /* if there isn't a freeze lock child then create one */
+ if (!ctdb->freeze_handle) {
+ ctdb->freeze_handle = ctdb_freeze_lock(ctdb);
+ CTDB_NO_MEMORY_VOID(ctdb, ctdb->freeze_handle);
+ ctdb->freeze_mode = CTDB_FREEZE_PENDING;
+ }
+}
+
+/*
+ freeze the databases
+ */
+int32_t ctdb_control_freeze(struct ctdb_context *ctdb, struct ctdb_req_control *c, bool *async_reply)
+{
+ struct ctdb_freeze_waiter *w;
+
+ if (ctdb->freeze_mode == CTDB_FREEZE_FROZEN) {
+ /* we're already frozen */
+ return 0;
+ }
+
+ ctdb_start_freeze(ctdb);
+
+ /* add ourselves to list of waiters */
+ w = talloc(ctdb->freeze_handle, struct ctdb_freeze_waiter);
+ CTDB_NO_MEMORY(ctdb, w);
+ w->ctdb = ctdb;
+ w->c = talloc_steal(w, c);
+ w->status = -1;
+ talloc_set_destructor(w, ctdb_freeze_waiter_destructor);
+ DLIST_ADD(ctdb->freeze_handle->waiters, w);
+
+ /* we won't reply till later */
+ *async_reply = True;
+ return 0;
+}
+
+
+/*
+ block until we are frozen, used during daemon startup
+ */
+bool ctdb_blocking_freeze(struct ctdb_context *ctdb)
+{
+ ctdb_start_freeze(ctdb);
+
+ /* block until frozen */
+ while (ctdb->freeze_mode == CTDB_FREEZE_PENDING) {
+ event_loop_once(ctdb->ev);
+ }
+
+ return ctdb->freeze_mode == CTDB_FREEZE_FROZEN;
+}
+
+
+
+/*
+ thaw the databases
+ */
+int32_t ctdb_control_thaw(struct ctdb_context *ctdb)
+{
+ talloc_free(ctdb->freeze_handle);
+ ctdb->freeze_handle = NULL;
+ ctdb_call_resend_all(ctdb);
+ return 0;
+}
diff --git a/source4/cluster/ctdb/server/ctdb_lockwait.c b/source4/cluster/ctdb/server/ctdb_lockwait.c
new file mode 100644
index 0000000000..5b0019836e
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_lockwait.c
@@ -0,0 +1,165 @@
+/*
+ wait for a tdb chain lock
+
+ Copyright (C) Andrew Tridgell 2006
+
+ 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 "lib/events/events.h"
+#include "system/filesys.h"
+#include "system/wait.h"
+#include "db_wrap.h"
+#include "lib/tdb/include/tdb.h"
+#include "../include/ctdb_private.h"
+
+
+struct lockwait_handle {
+ struct ctdb_context *ctdb;
+ struct ctdb_db_context *ctdb_db;
+ struct fd_event *fde;
+ int fd[2];
+ pid_t child;
+ void *private_data;
+ void (*callback)(void *);
+ TDB_DATA key;
+ struct timeval start_time;
+};
+
+static void lockwait_handler(struct event_context *ev, struct fd_event *fde,
+ uint16_t flags, void *private_data)
+{
+ struct lockwait_handle *h = talloc_get_type(private_data,
+ struct lockwait_handle);
+ void (*callback)(void *) = h->callback;
+ void *p = h->private_data;
+ pid_t child = h->child;
+ TDB_DATA key = h->key;
+ struct tdb_context *tdb = h->ctdb_db->ltdb->tdb;
+ TALLOC_CTX *tmp_ctx = talloc_new(ev);
+
+ key.dptr = talloc_memdup(tmp_ctx, key.dptr, key.dsize);
+
+ talloc_set_destructor(h, NULL);
+ ctdb_latency(&h->ctdb->statistics.max_lockwait_latency, h->start_time);
+ h->ctdb->statistics.pending_lockwait_calls--;
+
+ /* the handle needs to go away when the context is gone - when
+ the handle goes away this implicitly closes the pipe, which
+ kills the child holding the lock */
+ talloc_steal(tmp_ctx, h);
+
+ if (h->ctdb->flags & CTDB_FLAG_TORTURE) {
+ if (tdb_chainlock_nonblock(tdb, key) == 0) {
+ ctdb_fatal(h->ctdb, "got chain lock while lockwait child active");
+ }
+ }
+
+ tdb_chainlock_mark(tdb, key);
+ callback(p);
+ tdb_chainlock_unmark(tdb, key);
+
+ kill(child, SIGKILL);
+ waitpid(child, NULL, 0);
+ talloc_free(tmp_ctx);
+}
+
+static int lockwait_destructor(struct lockwait_handle *h)
+{
+ h->ctdb->statistics.pending_lockwait_calls--;
+ kill(h->child, SIGKILL);
+ waitpid(h->child, NULL, 0);
+ return 0;
+}
+
+/*
+ setup a non-blocking chainlock on a tdb record. If this function
+ returns NULL then it could not get the chainlock. Otherwise it
+ returns a opaque handle, and will call callback() once it has
+ managed to get the chainlock. You can cancel it by using talloc_free
+ on the returned handle.
+
+ It is the callers responsibility to unlock the chainlock once
+ acquired
+ */
+struct lockwait_handle *ctdb_lockwait(struct ctdb_db_context *ctdb_db,
+ TDB_DATA key,
+ void (*callback)(void *private_data),
+ void *private_data)
+{
+ struct lockwait_handle *result;
+ int ret;
+ pid_t parent = getpid();
+
+ ctdb_db->ctdb->statistics.lockwait_calls++;
+ ctdb_db->ctdb->statistics.pending_lockwait_calls++;
+
+ if (!(result = talloc_zero(private_data, struct lockwait_handle))) {
+ ctdb_db->ctdb->statistics.pending_lockwait_calls--;
+ return NULL;
+ }
+
+ ret = pipe(result->fd);
+
+ if (ret != 0) {
+ talloc_free(result);
+ ctdb_db->ctdb->statistics.pending_lockwait_calls--;
+ return NULL;
+ }
+
+ result->child = fork();
+
+ if (result->child == (pid_t)-1) {
+ close(result->fd[0]);
+ close(result->fd[1]);
+ talloc_free(result);
+ ctdb_db->ctdb->statistics.pending_lockwait_calls--;
+ return NULL;
+ }
+
+ result->callback = callback;
+ result->private_data = private_data;
+ result->ctdb = ctdb_db->ctdb;
+ result->ctdb_db = ctdb_db;
+ result->key = key;
+
+ if (result->child == 0) {
+ char c = 0;
+ close(result->fd[0]);
+ tdb_chainlock(ctdb_db->ltdb->tdb, key);
+ write(result->fd[1], &c, 1);
+ /* make sure we die when our parent dies */
+ while (kill(parent, 0) == 0 || errno != ESRCH) {
+ sleep(5);
+ }
+ _exit(0);
+ }
+
+ close(result->fd[1]);
+ talloc_set_destructor(result, lockwait_destructor);
+
+ result->fde = event_add_fd(ctdb_db->ctdb->ev, result, result->fd[0],
+ EVENT_FD_READ|EVENT_FD_AUTOCLOSE, lockwait_handler,
+ (void *)result);
+ if (result->fde == NULL) {
+ talloc_free(result);
+ ctdb_db->ctdb->statistics.pending_lockwait_calls--;
+ return NULL;
+ }
+
+ result->start_time = timeval_current();
+
+ return result;
+}
diff --git a/source4/cluster/ctdb/server/ctdb_ltdb_server.c b/source4/cluster/ctdb/server/ctdb_ltdb_server.c
new file mode 100644
index 0000000000..bd07f674db
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_ltdb_server.c
@@ -0,0 +1,366 @@
+/*
+ ctdb ltdb code - server side
+
+ Copyright (C) Andrew Tridgell 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 "lib/events/events.h"
+#include "lib/tdb/include/tdb.h"
+#include "system/network.h"
+#include "system/filesys.h"
+#include "../include/ctdb_private.h"
+#include "db_wrap.h"
+#include "lib/util/dlinklist.h"
+
+/*
+ this is the dummy null procedure that all databases support
+*/
+static int ctdb_null_func(struct ctdb_call_info *call)
+{
+ return 0;
+}
+
+/*
+ this is a plain fetch procedure that all databases support
+*/
+static int ctdb_fetch_func(struct ctdb_call_info *call)
+{
+ call->reply_data = &call->record_data;
+ return 0;
+}
+
+
+
+struct lock_fetch_state {
+ struct ctdb_context *ctdb;
+ void (*recv_pkt)(void *, struct ctdb_req_header *);
+ void *recv_context;
+ struct ctdb_req_header *hdr;
+ uint32_t generation;
+ bool ignore_generation;
+};
+
+/*
+ called when we should retry the operation
+ */
+static void lock_fetch_callback(void *p)
+{
+ struct lock_fetch_state *state = talloc_get_type(p, struct lock_fetch_state);
+ if (!state->ignore_generation &&
+ state->generation != state->ctdb->vnn_map->generation) {
+ DEBUG(0,("Discarding previous generation lockwait packet\n"));
+ talloc_free(state->hdr);
+ return;
+ }
+ state->recv_pkt(state->recv_context, state->hdr);
+ DEBUG(2,(__location__ " PACKET REQUEUED\n"));
+}
+
+
+/*
+ do a non-blocking ltdb_lock, deferring this ctdb request until we
+ have the chainlock
+
+ It does the following:
+
+ 1) tries to get the chainlock. If it succeeds, then it returns 0
+
+ 2) if it fails to get a chainlock immediately then it sets up a
+ non-blocking chainlock via ctdb_lockwait, and when it gets the
+ chainlock it re-submits this ctdb request to the main packet
+ receive function
+
+ This effectively queues all ctdb requests that cannot be
+ immediately satisfied until it can get the lock. This means that
+ the main ctdb daemon will not block waiting for a chainlock held by
+ a client
+
+ There are 3 possible return values:
+
+ 0: means that it got the lock immediately.
+ -1: means that it failed to get the lock, and won't retry
+ -2: means that it failed to get the lock immediately, but will retry
+ */
+int ctdb_ltdb_lock_requeue(struct ctdb_db_context *ctdb_db,
+ TDB_DATA key, struct ctdb_req_header *hdr,
+ void (*recv_pkt)(void *, struct ctdb_req_header *),
+ void *recv_context, bool ignore_generation)
+{
+ int ret;
+ struct tdb_context *tdb = ctdb_db->ltdb->tdb;
+ struct lockwait_handle *h;
+ struct lock_fetch_state *state;
+
+ ret = tdb_chainlock_nonblock(tdb, key);
+
+ if (ret != 0 &&
+ !(errno == EACCES || errno == EAGAIN || errno == EDEADLK)) {
+ /* a hard failure - don't try again */
+ return -1;
+ }
+
+ /* when torturing, ensure we test the contended path */
+ if ((ctdb_db->ctdb->flags & CTDB_FLAG_TORTURE) &&
+ random() % 5 == 0) {
+ ret = -1;
+ tdb_chainunlock(tdb, key);
+ }
+
+ /* first the non-contended path */
+ if (ret == 0) {
+ return 0;
+ }
+
+ state = talloc(hdr, struct lock_fetch_state);
+ state->ctdb = ctdb_db->ctdb;
+ state->hdr = hdr;
+ state->recv_pkt = recv_pkt;
+ state->recv_context = recv_context;
+ state->generation = ctdb_db->ctdb->vnn_map->generation;
+ state->ignore_generation = ignore_generation;
+
+ /* now the contended path */
+ h = ctdb_lockwait(ctdb_db, key, lock_fetch_callback, state);
+ if (h == NULL) {
+ tdb_chainunlock(tdb, key);
+ return -1;
+ }
+
+ /* we need to move the packet off the temporary context in ctdb_input_pkt(),
+ so it won't be freed yet */
+ talloc_steal(state, hdr);
+ talloc_steal(state, h);
+
+ /* now tell the caller than we will retry asynchronously */
+ return -2;
+}
+
+/*
+ a varient of ctdb_ltdb_lock_requeue that also fetches the record
+ */
+int ctdb_ltdb_lock_fetch_requeue(struct ctdb_db_context *ctdb_db,
+ TDB_DATA key, struct ctdb_ltdb_header *header,
+ struct ctdb_req_header *hdr, TDB_DATA *data,
+ void (*recv_pkt)(void *, struct ctdb_req_header *),
+ void *recv_context, bool ignore_generation)
+{
+ int ret;
+
+ ret = ctdb_ltdb_lock_requeue(ctdb_db, key, hdr, recv_pkt,
+ recv_context, ignore_generation);
+ if (ret == 0) {
+ ret = ctdb_ltdb_fetch(ctdb_db, key, header, hdr, data);
+ if (ret != 0) {
+ ctdb_ltdb_unlock(ctdb_db, key);
+ }
+ }
+ return ret;
+}
+
+
+/*
+ paraoid check to see if the db is empty
+ */
+static void ctdb_check_db_empty(struct ctdb_db_context *ctdb_db)
+{
+ struct tdb_context *tdb = ctdb_db->ltdb->tdb;
+ int count = tdb_traverse_read(tdb, NULL, NULL);
+ if (count != 0) {
+ DEBUG(0,(__location__ " tdb '%s' not empty on attach! aborting\n",
+ ctdb_db->db_path));
+ ctdb_fatal(ctdb_db->ctdb, "database not empty on attach");
+ }
+}
+
+/*
+ a client has asked to attach a new database
+ */
+int32_t ctdb_control_db_attach(struct ctdb_context *ctdb, TDB_DATA indata,
+ TDB_DATA *outdata)
+{
+ const char *db_name = (const char *)indata.dptr;
+ struct ctdb_db_context *ctdb_db, *tmp_db;
+ int ret;
+
+ /* see if we already have this name */
+ for (tmp_db=ctdb->db_list;tmp_db;tmp_db=tmp_db->next) {
+ if (strcmp(db_name, tmp_db->db_name) == 0) {
+ /* this is not an error */
+ outdata->dptr = (uint8_t *)&tmp_db->db_id;
+ outdata->dsize = sizeof(tmp_db->db_id);
+ return 0;
+ }
+ }
+
+ ctdb_db = talloc_zero(ctdb, struct ctdb_db_context);
+ CTDB_NO_MEMORY(ctdb, ctdb_db);
+
+ ctdb_db->ctdb = ctdb;
+ ctdb_db->db_name = talloc_strdup(ctdb_db, db_name);
+ CTDB_NO_MEMORY(ctdb, ctdb_db->db_name);
+
+ ctdb_db->db_id = ctdb_hash(&indata);
+
+ outdata->dptr = (uint8_t *)&ctdb_db->db_id;
+ outdata->dsize = sizeof(ctdb_db->db_id);
+
+ /* check for hash collisions */
+ for (tmp_db=ctdb->db_list;tmp_db;tmp_db=tmp_db->next) {
+ if (tmp_db->db_id == ctdb_db->db_id) {
+ DEBUG(0,("db_id 0x%x hash collision. name1='%s' name2='%s'\n",
+ tmp_db->db_id, db_name, tmp_db->db_name));
+ talloc_free(ctdb_db);
+ return -1;
+ }
+ }
+
+ if (ctdb->db_directory == NULL) {
+ ctdb->db_directory = VARDIR "/ctdb";
+ }
+
+ /* make sure the db directory exists */
+ if (mkdir(ctdb->db_directory, 0700) == -1 && errno != EEXIST) {
+ DEBUG(0,(__location__ " Unable to create ctdb directory '%s'\n",
+ ctdb->db_directory));
+ talloc_free(ctdb_db);
+ return -1;
+ }
+
+ /* open the database */
+ ctdb_db->db_path = talloc_asprintf(ctdb_db, "%s/%s.%u",
+ ctdb->db_directory,
+ db_name, ctdb->vnn);
+
+ ctdb_db->ltdb = tdb_wrap_open(ctdb, ctdb_db->db_path,
+ ctdb->tunable.database_hash_size,
+ TDB_CLEAR_IF_FIRST, O_CREAT|O_RDWR, 0666);
+ if (ctdb_db->ltdb == NULL) {
+ DEBUG(0,("Failed to open tdb '%s'\n", ctdb_db->db_path));
+ talloc_free(ctdb_db);
+ return -1;
+ }
+
+ ctdb_check_db_empty(ctdb_db);
+
+ DLIST_ADD(ctdb->db_list, ctdb_db);
+
+ /*
+ all databases support the "null" function. we need this in
+ order to do forced migration of records
+ */
+ ret = ctdb_daemon_set_call(ctdb, ctdb_db->db_id, ctdb_null_func, CTDB_NULL_FUNC);
+ if (ret != 0) {
+ DEBUG(0,("Failed to setup null function for '%s'\n", ctdb_db->db_name));
+ talloc_free(ctdb_db);
+ return -1;
+ }
+
+ /*
+ all databases support the "fetch" function. we need this
+ for efficient Samba3 ctdb fetch
+ */
+ ret = ctdb_daemon_set_call(ctdb, ctdb_db->db_id, ctdb_fetch_func, CTDB_FETCH_FUNC);
+ if (ret != 0) {
+ DEBUG(0,("Failed to setup fetch function for '%s'\n", ctdb_db->db_name));
+ talloc_free(ctdb_db);
+ return -1;
+ }
+
+ /* tell all the other nodes about this database */
+ ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_ALL, 0,
+ CTDB_CONTROL_DB_ATTACH, 0, CTDB_CTRL_FLAG_NOREPLY,
+ indata, NULL, NULL);
+
+ DEBUG(1,("Attached to database '%s'\n", ctdb_db->db_path));
+
+ /* success */
+ return 0;
+}
+
+/*
+ called when a broadcast seqnum update comes in
+ */
+int32_t ctdb_ltdb_update_seqnum(struct ctdb_context *ctdb, uint32_t db_id, uint32_t srcnode)
+{
+ struct ctdb_db_context *ctdb_db;
+ if (srcnode == ctdb->vnn) {
+ /* don't update ourselves! */
+ return 0;
+ }
+
+ ctdb_db = find_ctdb_db(ctdb, db_id);
+ if (!ctdb_db) {
+ DEBUG(0,("Unknown db_id 0x%x in ctdb_ltdb_update_seqnum\n", db_id));
+ return -1;
+ }
+
+ tdb_increment_seqnum_nonblock(ctdb_db->ltdb->tdb);
+ ctdb_db->seqnum = tdb_get_seqnum(ctdb_db->ltdb->tdb);
+ return 0;
+}
+
+/*
+ timer to check for seqnum changes in a ltdb and propogate them
+ */
+static void ctdb_ltdb_seqnum_check(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *p)
+{
+ struct ctdb_db_context *ctdb_db = talloc_get_type(p, struct ctdb_db_context);
+ struct ctdb_context *ctdb = ctdb_db->ctdb;
+ uint32_t new_seqnum = tdb_get_seqnum(ctdb_db->ltdb->tdb);
+ if (new_seqnum != ctdb_db->seqnum) {
+ /* something has changed - propogate it */
+ TDB_DATA data;
+ data.dptr = (uint8_t *)&ctdb_db->db_id;
+ data.dsize = sizeof(uint32_t);
+ ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_VNNMAP, 0,
+ CTDB_CONTROL_UPDATE_SEQNUM, 0, CTDB_CTRL_FLAG_NOREPLY,
+ data, NULL, NULL);
+ }
+ ctdb_db->seqnum = new_seqnum;
+
+ /* setup a new timer */
+ ctdb_db->te =
+ event_add_timed(ctdb->ev, ctdb_db,
+ timeval_current_ofs(ctdb->tunable.seqnum_frequency, 0),
+ ctdb_ltdb_seqnum_check, ctdb_db);
+}
+
+/*
+ enable seqnum handling on this db
+ */
+int32_t ctdb_ltdb_enable_seqnum(struct ctdb_context *ctdb, uint32_t db_id)
+{
+ struct ctdb_db_context *ctdb_db;
+ ctdb_db = find_ctdb_db(ctdb, db_id);
+ if (!ctdb_db) {
+ DEBUG(0,("Unknown db_id 0x%x in ctdb_ltdb_enable_seqnum\n", db_id));
+ return -1;
+ }
+
+ if (ctdb_db->te == NULL) {
+ ctdb_db->te =
+ event_add_timed(ctdb->ev, ctdb_db,
+ timeval_current_ofs(ctdb->tunable.seqnum_frequency, 0),
+ ctdb_ltdb_seqnum_check, ctdb_db);
+ }
+
+ tdb_enable_seqnum(ctdb_db->ltdb->tdb);
+ ctdb_db->seqnum = tdb_get_seqnum(ctdb_db->ltdb->tdb);
+ return 0;
+}
+
diff --git a/source4/cluster/ctdb/server/ctdb_monitor.c b/source4/cluster/ctdb/server/ctdb_monitor.c
new file mode 100644
index 0000000000..ec5244703c
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_monitor.c
@@ -0,0 +1,227 @@
+/*
+ monitoring links to all other nodes to detect dead nodes
+
+
+ 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 "lib/events/events.h"
+#include "system/filesys.h"
+#include "system/wait.h"
+#include "../include/ctdb_private.h"
+
+/*
+ see if any nodes are dead
+ */
+static void ctdb_check_for_dead_nodes(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);
+ int i;
+
+ if (ctdb->monitoring_mode == CTDB_MONITORING_DISABLED) {
+ event_add_timed(ctdb->ev, ctdb->monitor_context,
+ timeval_current_ofs(ctdb->tunable.keepalive_interval, 0),
+ ctdb_check_for_dead_nodes, ctdb);
+ return;
+ }
+
+ /* send a keepalive to all other nodes, unless */
+ for (i=0;i<ctdb->num_nodes;i++) {
+ struct ctdb_node *node = ctdb->nodes[i];
+ if (node->vnn == ctdb->vnn) {
+ continue;
+ }
+
+ if (node->flags & NODE_FLAGS_DISCONNECTED) {
+ /* it might have come alive again */
+ if (node->rx_cnt != 0) {
+ ctdb_node_connected(node);
+ }
+ continue;
+ }
+
+
+ if (node->rx_cnt == 0) {
+ node->dead_count++;
+ } else {
+ node->dead_count = 0;
+ }
+
+ node->rx_cnt = 0;
+
+ if (node->dead_count >= ctdb->tunable.keepalive_limit) {
+ DEBUG(0,("dead count reached for node %u\n", node->vnn));
+ ctdb_node_dead(node);
+ ctdb_send_keepalive(ctdb, node->vnn);
+ /* maybe tell the transport layer to kill the
+ sockets as well?
+ */
+ continue;
+ }
+
+ if (node->tx_cnt == 0) {
+ DEBUG(5,("sending keepalive to %u\n", node->vnn));
+ ctdb_send_keepalive(ctdb, node->vnn);
+ }
+
+ node->tx_cnt = 0;
+ }
+
+ event_add_timed(ctdb->ev, ctdb->monitor_context,
+ timeval_current_ofs(ctdb->tunable.keepalive_interval, 0),
+ ctdb_check_for_dead_nodes, ctdb);
+}
+
+static void ctdb_check_health(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *private_data);
+
+/*
+ called when a health monitoring event script finishes
+ */
+static void ctdb_health_callback(struct ctdb_context *ctdb, int status, void *p)
+{
+ struct ctdb_node *node = ctdb->nodes[ctdb->vnn];
+ TDB_DATA data;
+ struct ctdb_node_flag_change c;
+
+ event_add_timed(ctdb->ev, ctdb->monitor_context,
+ timeval_current_ofs(ctdb->tunable.monitor_interval, 0),
+ ctdb_check_health, ctdb);
+
+ if (status != 0 && !(node->flags & NODE_FLAGS_UNHEALTHY)) {
+ DEBUG(0,("monitor event failed - disabling node\n"));
+ node->flags |= NODE_FLAGS_UNHEALTHY;
+ } else if (status == 0 && (node->flags & NODE_FLAGS_UNHEALTHY)) {
+ DEBUG(0,("monitor event OK - node re-enabled\n"));
+ ctdb->nodes[ctdb->vnn]->flags &= ~NODE_FLAGS_UNHEALTHY;
+ } else {
+ /* no change */
+ return;
+ }
+
+ c.vnn = ctdb->vnn;
+ c.flags = node->flags;
+
+ data.dptr = (uint8_t *)&c;
+ data.dsize = sizeof(c);
+
+ /* tell the other nodes that something has changed */
+ ctdb_daemon_send_message(ctdb, CTDB_BROADCAST_CONNECTED,
+ CTDB_SRVID_NODE_FLAGS_CHANGED, data);
+
+}
+
+
+/*
+ see if the event scripts think we are healthy
+ */
+static void ctdb_check_health(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);
+ int ret;
+
+ if (ctdb->monitoring_mode == CTDB_MONITORING_DISABLED) {
+ event_add_timed(ctdb->ev, ctdb->monitor_context,
+ timeval_current_ofs(ctdb->tunable.monitor_interval, 0),
+ ctdb_check_health, ctdb);
+ return;
+ }
+
+ ret = ctdb_event_script_callback(ctdb,
+ timeval_current_ofs(ctdb->tunable.script_timeout, 0),
+ ctdb->monitor_context, ctdb_health_callback, ctdb, "monitor");
+ if (ret != 0) {
+ DEBUG(0,("Unable to launch monitor event script\n"));
+ event_add_timed(ctdb->ev, ctdb->monitor_context,
+ timeval_current_ofs(ctdb->tunable.monitor_interval, 0),
+ ctdb_check_health, ctdb);
+ }
+}
+
+/* stop any monitoring */
+void ctdb_stop_monitoring(struct ctdb_context *ctdb)
+{
+ talloc_free(ctdb->monitor_context);
+ ctdb->monitor_context = talloc_new(ctdb);
+ CTDB_NO_MEMORY_FATAL(ctdb, ctdb->monitor_context);
+}
+
+/*
+ start watching for nodes that might be dead
+ */
+void ctdb_start_monitoring(struct ctdb_context *ctdb)
+{
+ struct timed_event *te;
+
+ ctdb_stop_monitoring(ctdb);
+
+ te = event_add_timed(ctdb->ev, ctdb->monitor_context,
+ timeval_current_ofs(ctdb->tunable.keepalive_interval, 0),
+ ctdb_check_for_dead_nodes, ctdb);
+ CTDB_NO_MEMORY_FATAL(ctdb, te);
+
+ te = event_add_timed(ctdb->ev, ctdb->monitor_context,
+ timeval_current_ofs(ctdb->tunable.monitor_interval, 0),
+ ctdb_check_health, ctdb);
+ CTDB_NO_MEMORY_FATAL(ctdb, te);
+}
+
+
+/*
+ modify flags on a node
+ */
+int32_t ctdb_control_modflags(struct ctdb_context *ctdb, TDB_DATA indata)
+{
+ struct ctdb_node_modflags *m = (struct ctdb_node_modflags *)indata.dptr;
+ TDB_DATA data;
+ struct ctdb_node_flag_change c;
+ struct ctdb_node *node = ctdb->nodes[ctdb->vnn];
+ uint32_t old_flags = node->flags;
+
+ node->flags |= m->set;
+ node->flags &= ~m->clear;
+
+ if (node->flags == old_flags) {
+ /* no change */
+ return 0;
+ }
+
+ DEBUG(0, ("Control modflags on node %u - flags now 0x%x\n", ctdb->vnn, node->flags));
+
+ /* if we have been banned, go into recovery mode */
+ c.vnn = ctdb->vnn;
+ c.flags = node->flags;
+
+ data.dptr = (uint8_t *)&c;
+ data.dsize = sizeof(c);
+
+ /* tell the other nodes that something has changed */
+ ctdb_daemon_send_message(ctdb, CTDB_BROADCAST_CONNECTED,
+ CTDB_SRVID_NODE_FLAGS_CHANGED, data);
+
+ if ((node->flags & NODE_FLAGS_BANNED) && !(old_flags & NODE_FLAGS_BANNED)) {
+ /* make sure we are frozen */
+ DEBUG(0,("This node has been banned - forcing freeze and recovery\n"));
+ ctdb_start_freeze(ctdb);
+ ctdb_release_all_ips(ctdb);
+ ctdb->recovery_mode = CTDB_RECOVERY_ACTIVE;
+ }
+
+ return 0;
+}
diff --git a/source4/cluster/ctdb/server/ctdb_recover.c b/source4/cluster/ctdb/server/ctdb_recover.c
new file mode 100644
index 0000000000..82338d48ce
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_recover.c
@@ -0,0 +1,680 @@
+/*
+ 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 "lib/events/events.h"
+#include "lib/tdb/include/tdb.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"
+
+/*
+ lock all databases - mark only
+ */
+static int ctdb_lock_all_databases_mark(struct ctdb_context *ctdb)
+{
+ struct ctdb_db_context *ctdb_db;
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("Attempt to mark all databases locked when not frozen\n"));
+ return -1;
+ }
+ for (ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next) {
+ if (tdb_lockall_mark(ctdb_db->ltdb->tdb) != 0) {
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*
+ lock all databases - unmark only
+ */
+static int ctdb_lock_all_databases_unmark(struct ctdb_context *ctdb)
+{
+ struct ctdb_db_context *ctdb_db;
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("Attempt to unmark all databases locked when not frozen\n"));
+ return -1;
+ }
+ for (ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next) {
+ if (tdb_lockall_unmark(ctdb_db->ltdb->tdb) != 0) {
+ return -1;
+ }
+ }
+ return 0;
+}
+
+
+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_VOID(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;
+
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("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, dbids) + 4*len;
+ outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
+ if (!outdata->dptr) {
+ DEBUG(0, (__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->dbids[i] = ctdb_db->db_id;
+ }
+
+ 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(0, (__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++) {
+ inet_aton(ctdb->nodes[i]->address.address, &node_map->nodes[i].sin.sin_addr);
+ node_map->nodes[i].vnn = ctdb->nodes[i]->vnn;
+ node_map->nodes[i].flags = ctdb->nodes[i]->flags;
+ }
+
+ return 0;
+}
+
+struct getkeys_params {
+ struct ctdb_context *ctdb;
+ uint32_t lmaster;
+ uint32_t rec_count;
+ struct getkeys_rec {
+ TDB_DATA key;
+ TDB_DATA data;
+ } *recs;
+};
+
+static int traverse_getkeys(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
+{
+ struct getkeys_params *params = (struct getkeys_params *)p;
+ uint32_t lmaster;
+
+ lmaster = ctdb_lmaster(params->ctdb, &key);
+
+ /* only include this record if the lmaster matches or if
+ the wildcard lmaster (-1) was specified.
+ */
+ if ((params->lmaster != CTDB_LMASTER_ANY) && (params->lmaster != lmaster)) {
+ return 0;
+ }
+
+ params->recs = talloc_realloc(NULL, params->recs, struct getkeys_rec, params->rec_count+1);
+ key.dptr = talloc_memdup(params->recs, key.dptr, key.dsize);
+ data.dptr = talloc_memdup(params->recs, data.dptr, data.dsize);
+ params->recs[params->rec_count].key = key;
+ params->recs[params->rec_count].data = data;
+ params->rec_count++;
+
+ return 0;
+}
+
+/*
+ pul 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 getkeys_params params;
+ struct ctdb_control_pulldb_reply *reply;
+ int i;
+ size_t len = 0;
+
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("rejecting ctdb_control_pull_db when not frozen\n"));
+ return -1;
+ }
+
+ pull = (struct ctdb_control_pulldb *)indata.dptr;
+
+ ctdb_db = find_ctdb_db(ctdb, pull->db_id);
+ if (!ctdb_db) {
+ DEBUG(0,(__location__ " Unknown db\n"));
+ return -1;
+ }
+
+ params.ctdb = ctdb;
+ params.lmaster = pull->lmaster;
+
+ params.rec_count = 0;
+ params.recs = talloc_array(outdata, struct getkeys_rec, 0);
+ CTDB_NO_MEMORY(ctdb, params.recs);
+
+ if (ctdb_lock_all_databases_mark(ctdb) != 0) {
+ DEBUG(0,(__location__ " Failed to get lock on entired db - failing\n"));
+ return -1;
+ }
+
+ tdb_traverse_read(ctdb_db->ltdb->tdb, traverse_getkeys, &params);
+
+ ctdb_lock_all_databases_unmark(ctdb);
+
+ reply = talloc(outdata, struct ctdb_control_pulldb_reply);
+ CTDB_NO_MEMORY(ctdb, reply);
+
+ reply->db_id = pull->db_id;
+ reply->count = params.rec_count;
+
+ len = offsetof(struct ctdb_control_pulldb_reply, data);
+
+ for (i=0;i<reply->count;i++) {
+ struct ctdb_rec_data *rec;
+ rec = ctdb_marshall_record(outdata, 0, params.recs[i].key, params.recs[i].data);
+ reply = talloc_realloc_size(outdata, reply, rec->length + len);
+ memcpy(len+(uint8_t *)reply, rec, rec->length);
+ len += rec->length;
+ talloc_free(rec);
+ }
+
+ talloc_free(params.recs);
+
+ outdata->dptr = (uint8_t *)reply;
+ outdata->dsize = len;
+
+ 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_control_pulldb_reply *reply = (struct ctdb_control_pulldb_reply *)indata.dptr;
+ struct ctdb_db_context *ctdb_db;
+ int i, ret;
+ struct ctdb_rec_data *rec;
+
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("rejecting ctdb_control_push_db when not frozen\n"));
+ return -1;
+ }
+
+ if (indata.dsize < offsetof(struct ctdb_control_pulldb_reply, data)) {
+ DEBUG(0,(__location__ " invalid data in pulldb reply\n"));
+ return -1;
+ }
+
+ ctdb_db = find_ctdb_db(ctdb, reply->db_id);
+ if (!ctdb_db) {
+ DEBUG(0,(__location__ " Unknown db 0x%08x\n", reply->db_id));
+ return -1;
+ }
+
+ if (ctdb_lock_all_databases_mark(ctdb) != 0) {
+ DEBUG(0,(__location__ " Failed to get lock on entired db - failing\n"));
+ return -1;
+ }
+
+ rec = (struct ctdb_rec_data *)&reply->data[0];
+
+ DEBUG(3,("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, header;
+
+ 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(0,(__location__ " bad ltdb record\n"));
+ goto failed;
+ }
+ hdr = (struct ctdb_ltdb_header *)data.dptr;
+ data.dptr += sizeof(*hdr);
+ data.dsize -= sizeof(*hdr);
+
+ ret = ctdb_ltdb_fetch(ctdb_db, key, &header, NULL, NULL);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to fetch record\n"));
+ goto failed;
+ }
+ /* The check for dmaster gives priority to the dmaster
+ if the rsn values are equal */
+ if (header.rsn < hdr->rsn ||
+ (header.dmaster != ctdb->vnn && header.rsn == hdr->rsn)) {
+ ret = ctdb_ltdb_store(ctdb_db, key, hdr, data);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to store record\n"));
+ goto failed;
+ }
+ }
+
+ rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
+ }
+
+ DEBUG(3,("finished push of %u records for dbid 0x%x\n",
+ reply->count, reply->db_id));
+
+ ctdb_lock_all_databases_unmark(ctdb);
+ return 0;
+
+failed:
+ ctdb_lock_all_databases_unmark(ctdb);
+ return -1;
+}
+
+
+static int traverse_setdmaster(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
+{
+ uint32_t *dmaster = (uint32_t *)p;
+ struct ctdb_ltdb_header *header = (struct ctdb_ltdb_header *)data.dptr;
+ int ret;
+
+ header->dmaster = *dmaster;
+
+ ret = tdb_store(tdb, key, data, TDB_REPLACE);
+ if (ret) {
+ DEBUG(0,(__location__ " failed to write tdb data back ret:%d\n",ret));
+ return ret;
+ }
+ return 0;
+}
+
+int32_t ctdb_control_set_dmaster(struct ctdb_context *ctdb, TDB_DATA indata)
+{
+ struct ctdb_control_set_dmaster *p = (struct ctdb_control_set_dmaster *)indata.dptr;
+ struct ctdb_db_context *ctdb_db;
+
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("rejecting ctdb_control_set_dmaster when not frozen\n"));
+ return -1;
+ }
+
+ ctdb_db = find_ctdb_db(ctdb, p->db_id);
+ if (!ctdb_db) {
+ DEBUG(0,(__location__ " Unknown db 0x%08x\n", p->db_id));
+ return -1;
+ }
+
+ if (ctdb_lock_all_databases_mark(ctdb) != 0) {
+ DEBUG(0,(__location__ " Failed to get lock on entired db - failing\n"));
+ return -1;
+ }
+
+ tdb_traverse(ctdb_db->ltdb->tdb, traverse_setdmaster, &p->dmaster);
+
+ ctdb_lock_all_databases_unmark(ctdb);
+
+ return 0;
+}
+
+struct ctdb_set_recmode_state {
+ struct ctdb_req_control *c;
+ uint32_t recmode;
+};
+
+/*
+ called when the 'recovered' event script has finished
+ */
+static void ctdb_recovered_callback(struct ctdb_context *ctdb, int status, void *p)
+{
+ struct ctdb_set_recmode_state *state = talloc_get_type(p, struct ctdb_set_recmode_state);
+
+ ctdb_start_monitoring(ctdb);
+
+ if (status == 0) {
+ ctdb->recovery_mode = state->recmode;
+ } else {
+ DEBUG(0,(__location__ " recovered event script failed (status %d)\n", status));
+ }
+
+ ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
+ talloc_free(state);
+}
+
+/*
+ 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 ret;
+ struct ctdb_set_recmode_state *state;
+
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("Attempt to change recovery mode to %u when not frozen\n",
+ recmode));
+ (*errormsg) = "Cannot change recovery mode while not frozen";
+ return -1;
+ }
+
+ if (recmode != CTDB_RECOVERY_NORMAL ||
+ ctdb->recovery_mode != CTDB_RECOVERY_ACTIVE) {
+ ctdb->recovery_mode = recmode;
+ return 0;
+ }
+
+ /* some special handling when ending recovery mode */
+ state = talloc(ctdb, struct ctdb_set_recmode_state);
+ CTDB_NO_MEMORY(ctdb, state);
+
+ /* we should not be able to get the lock on the nodes list, as it should be
+ held by the recovery master */
+ if (ctdb_recovery_lock(ctdb, false)) {
+ DEBUG(0,("ERROR: recovery lock file %s not locked when recovering!\n",
+ ctdb->recovery_lock_file));
+ return -1;
+ }
+
+ state->c = talloc_steal(state, c);
+ state->recmode = recmode;
+
+ ctdb_stop_monitoring(ctdb);
+
+ /* call the events script to tell all subsystems that we have recovered */
+ ret = ctdb_event_script_callback(ctdb,
+ timeval_current_ofs(ctdb->tunable.script_timeout, 0),
+ state,
+ ctdb_recovered_callback,
+ state, "recovered");
+ if (ret != 0) {
+ return ret;
+ }
+ *async_reply = true;
+
+ return 0;
+}
+
+/*
+ callback for ctdb_control_max_rsn
+ */
+static int traverse_max_rsn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
+{
+ struct ctdb_ltdb_header *h = (struct ctdb_ltdb_header *)data.dptr;
+ uint64_t *max_rsn = (uint64_t *)p;
+
+ if (data.dsize >= sizeof(*h)) {
+ (*max_rsn) = MAX(*max_rsn, h->rsn);
+ }
+ return 0;
+}
+
+/*
+ get max rsn across an entire db
+ */
+int32_t ctdb_control_max_rsn(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
+{
+ struct ctdb_db_context *ctdb_db;
+ uint32_t db_id = *(uint32_t *)indata.dptr;
+ uint64_t max_rsn = 0;
+ int ret;
+
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("rejecting ctdb_control_max_rsn when not frozen\n"));
+ return -1;
+ }
+
+ ctdb_db = find_ctdb_db(ctdb, db_id);
+ if (!ctdb_db) {
+ DEBUG(0,(__location__ " Unknown db\n"));
+ return -1;
+ }
+
+ if (ctdb_lock_all_databases_mark(ctdb) != 0) {
+ DEBUG(0,(__location__ " Failed to get lock on entired db - failing\n"));
+ return -1;
+ }
+
+ ret = tdb_traverse_read(ctdb_db->ltdb->tdb, traverse_max_rsn, &max_rsn);
+ if (ret < 0) {
+ DEBUG(0,(__location__ " traverse failed in ctdb_control_max_rsn\n"));
+ return -1;
+ }
+
+ ctdb_lock_all_databases_unmark(ctdb);
+
+ outdata->dptr = (uint8_t *)talloc(outdata, uint64_t);
+ if (!outdata->dptr) {
+ return -1;
+ }
+ (*(uint64_t *)outdata->dptr) = max_rsn;
+ outdata->dsize = sizeof(uint64_t);
+
+ return 0;
+}
+
+
+/*
+ callback for ctdb_control_set_rsn_nonempty
+ */
+static int traverse_set_rsn_nonempty(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
+{
+ struct ctdb_ltdb_header *h = (struct ctdb_ltdb_header *)data.dptr;
+ uint64_t *rsn = (uint64_t *)p;
+
+ if (data.dsize > sizeof(*h)) {
+ h->rsn = *rsn;
+ if (tdb_store(tdb, key, data, TDB_REPLACE) != 0) {
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*
+ set rsn for all non-empty records in a database to a given rsn
+ */
+int32_t ctdb_control_set_rsn_nonempty(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
+{
+ struct ctdb_control_set_rsn_nonempty *p = (struct ctdb_control_set_rsn_nonempty *)indata.dptr;
+ struct ctdb_db_context *ctdb_db;
+ int ret;
+
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("rejecting ctdb_control_set_rsn_nonempty when not frozen\n"));
+ return -1;
+ }
+
+ ctdb_db = find_ctdb_db(ctdb, p->db_id);
+ if (!ctdb_db) {
+ DEBUG(0,(__location__ " Unknown db\n"));
+ return -1;
+ }
+
+ if (ctdb_lock_all_databases_mark(ctdb) != 0) {
+ DEBUG(0,(__location__ " Failed to get lock on entired db - failing\n"));
+ return -1;
+ }
+
+ ret = tdb_traverse(ctdb_db->ltdb->tdb, traverse_set_rsn_nonempty, &p->rsn);
+ if (ret < 0) {
+ DEBUG(0,(__location__ " traverse failed in ctdb_control_set_rsn_nonempty\n"));
+ return -1;
+ }
+
+ ctdb_lock_all_databases_unmark(ctdb);
+
+ return 0;
+}
+
+
+/*
+ callback for ctdb_control_delete_low_rsn
+ */
+static int traverse_delete_low_rsn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
+{
+ struct ctdb_ltdb_header *h = (struct ctdb_ltdb_header *)data.dptr;
+ uint64_t *rsn = (uint64_t *)p;
+
+ if (data.dsize < sizeof(*h) || h->rsn < *rsn) {
+ if (tdb_delete(tdb, key) != 0) {
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*
+ delete any records with a rsn < the given rsn
+ */
+int32_t ctdb_control_delete_low_rsn(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
+{
+ struct ctdb_control_delete_low_rsn *p = (struct ctdb_control_delete_low_rsn *)indata.dptr;
+ struct ctdb_db_context *ctdb_db;
+ int ret;
+
+ if (ctdb->freeze_mode != CTDB_FREEZE_FROZEN) {
+ DEBUG(0,("rejecting ctdb_control_delete_low_rsn when not frozen\n"));
+ return -1;
+ }
+
+ ctdb_db = find_ctdb_db(ctdb, p->db_id);
+ if (!ctdb_db) {
+ DEBUG(0,(__location__ " Unknown db\n"));
+ return -1;
+ }
+
+ if (ctdb_lock_all_databases_mark(ctdb) != 0) {
+ DEBUG(0,(__location__ " Failed to get lock on entired db - failing\n"));
+ return -1;
+ }
+
+ ret = tdb_traverse(ctdb_db->ltdb->tdb, traverse_delete_low_rsn, &p->rsn);
+ if (ret < 0) {
+ DEBUG(0,(__location__ " traverse failed in ctdb_control_delete_low_rsn\n"));
+ return -1;
+ }
+
+ ctdb_lock_all_databases_unmark(ctdb);
+
+ 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 (ctdb->recovery_lock_fd != -1) {
+ close(ctdb->recovery_lock_fd);
+ }
+ ctdb->recovery_lock_fd = open(ctdb->recovery_lock_file, O_RDWR|O_CREAT, 0600);
+ if (ctdb->recovery_lock_fd == -1) {
+ DEBUG(0,("Unable to open %s - (%s)\n",
+ ctdb->recovery_lock_file, strerror(errno)));
+ return false;
+ }
+
+ 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) {
+ return false;
+ }
+
+ if (!keep) {
+ close(ctdb->recovery_lock_fd);
+ ctdb->recovery_lock_fd = -1;
+ }
+
+ return true;
+}
diff --git a/source4/cluster/ctdb/server/ctdb_recoverd.c b/source4/cluster/ctdb/server/ctdb_recoverd.c
new file mode 100644
index 0000000000..5cb985521d
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_recoverd.c
@@ -0,0 +1,1511 @@
+/*
+ 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 "includes.h"
+#include "lib/events/events.h"
+#include "system/filesys.h"
+#include "system/time.h"
+#include "popt.h"
+#include "cmdline.h"
+#include "../include/ctdb.h"
+#include "../include/ctdb_private.h"
+
+
+struct ban_state {
+ struct ctdb_recoverd *rec;
+ uint32_t banned_node;
+};
+
+/*
+ private state of recovery daemon
+ */
+struct ctdb_recoverd {
+ struct ctdb_context *ctdb;
+ uint32_t last_culprit;
+ uint32_t culprit_counter;
+ struct timeval first_recover_time;
+ struct ban_state **banned_nodes;
+ struct timeval priority_time;
+};
+
+#define CONTROL_TIMEOUT() timeval_current_ofs(ctdb->tunable.recover_timeout, 0)
+#define MONITOR_TIMEOUT() timeval_current_ofs(ctdb->tunable.recover_interval, 0)
+
+/*
+ unban a node
+ */
+static void ctdb_unban_node(struct ctdb_recoverd *rec, uint32_t vnn)
+{
+ struct ctdb_context *ctdb = rec->ctdb;
+
+ if (!ctdb_validate_vnn(ctdb, vnn)) {
+ DEBUG(0,("Bad vnn %u in ctdb_ban_node\n", vnn));
+ return;
+ }
+
+ if (rec->banned_nodes[vnn] == NULL) {
+ return;
+ }
+
+ ctdb_ctrl_modflags(ctdb, CONTROL_TIMEOUT(), vnn, 0, NODE_FLAGS_BANNED);
+
+ talloc_free(rec->banned_nodes[vnn]);
+ rec->banned_nodes[vnn] = NULL;
+}
+
+
+/*
+ called when a ban has timed out
+ */
+static void ctdb_ban_timeout(struct event_context *ev, struct timed_event *te, struct timeval t, void *p)
+{
+ struct ban_state *state = talloc_get_type(p, struct ban_state);
+ struct ctdb_recoverd *rec = state->rec;
+ uint32_t vnn = state->banned_node;
+
+ DEBUG(0,("Node %u is now unbanned\n", vnn));
+ ctdb_unban_node(rec, vnn);
+}
+
+/*
+ ban a node for a period of time
+ */
+static void ctdb_ban_node(struct ctdb_recoverd *rec, uint32_t vnn, uint32_t ban_time)
+{
+ struct ctdb_context *ctdb = rec->ctdb;
+
+ if (!ctdb_validate_vnn(ctdb, vnn)) {
+ DEBUG(0,("Bad vnn %u in ctdb_ban_node\n", vnn));
+ return;
+ }
+
+ if (vnn == ctdb->vnn) {
+ DEBUG(0,("self ban - lowering our election priority\n"));
+ /* banning ourselves - lower our election priority */
+ rec->priority_time = timeval_current();
+ }
+
+ ctdb_ctrl_modflags(ctdb, CONTROL_TIMEOUT(), vnn, NODE_FLAGS_BANNED, 0);
+
+ rec->banned_nodes[vnn] = talloc(rec, struct ban_state);
+ CTDB_NO_MEMORY_FATAL(ctdb, rec->banned_nodes[vnn]);
+
+ rec->banned_nodes[vnn]->rec = rec;
+ rec->banned_nodes[vnn]->banned_node = vnn;
+
+ if (ban_time != 0) {
+ event_add_timed(ctdb->ev, rec->banned_nodes[vnn],
+ timeval_current_ofs(ban_time, 0),
+ ctdb_ban_timeout, rec->banned_nodes[vnn]);
+ }
+}
+
+
+/*
+ change recovery mode on all nodes
+ */
+static int set_recovery_mode(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap, uint32_t rec_mode)
+{
+ int j, ret;
+
+ /* start the freeze process immediately on all nodes */
+ ctdb_control(ctdb, CTDB_BROADCAST_CONNECTED, 0,
+ CTDB_CONTROL_FREEZE, CTDB_CTRL_FLAG_NOREPLY, tdb_null,
+ NULL, NULL, NULL, NULL, NULL);
+
+ /* set recovery mode to active on all nodes */
+ for (j=0; j<nodemap->num; j++) {
+ /* dont change it for nodes that are unavailable */
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+
+ if (rec_mode == CTDB_RECOVERY_ACTIVE) {
+ ret = ctdb_ctrl_freeze(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to freeze node %u\n", nodemap->nodes[j].vnn));
+ return -1;
+ }
+ }
+
+ ret = ctdb_ctrl_setrecmode(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn, rec_mode);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to set recmode on node %u\n", nodemap->nodes[j].vnn));
+ return -1;
+ }
+
+ if (rec_mode == CTDB_RECOVERY_NORMAL) {
+ ret = ctdb_ctrl_thaw(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to thaw node %u\n", nodemap->nodes[j].vnn));
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*
+ change recovery master on all node
+ */
+static int set_recovery_master(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap, uint32_t vnn)
+{
+ int j, ret;
+
+ /* set recovery master to vnn on all nodes */
+ for (j=0; j<nodemap->num; j++) {
+ /* dont change it for nodes that are unavailable */
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+
+ ret = ctdb_ctrl_setrecmaster(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn, vnn);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to set recmaster on node %u\n", nodemap->nodes[j].vnn));
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ ensure all other nodes have attached to any databases that we have
+ */
+static int create_missing_remote_databases(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
+ uint32_t vnn, struct ctdb_dbid_map *dbmap, TALLOC_CTX *mem_ctx)
+{
+ int i, j, db, ret;
+ struct ctdb_dbid_map *remote_dbmap;
+
+ /* verify that all other nodes have all our databases */
+ for (j=0; j<nodemap->num; j++) {
+ /* we dont need to ourself ourselves */
+ if (nodemap->nodes[j].vnn == vnn) {
+ continue;
+ }
+ /* dont check nodes that are unavailable */
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+
+ ret = ctdb_ctrl_getdbmap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn,
+ mem_ctx, &remote_dbmap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get dbids from node %u\n", vnn));
+ return -1;
+ }
+
+ /* step through all local databases */
+ for (db=0; db<dbmap->num;db++) {
+ const char *name;
+
+
+ for (i=0;i<remote_dbmap->num;i++) {
+ if (dbmap->dbids[db] == remote_dbmap->dbids[i]) {
+ break;
+ }
+ }
+ /* the remote node already have this database */
+ if (i!=remote_dbmap->num) {
+ continue;
+ }
+ /* ok so we need to create this database */
+ ctdb_ctrl_getdbname(ctdb, CONTROL_TIMEOUT(), vnn, dbmap->dbids[db], mem_ctx, &name);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get dbname from node %u\n", vnn));
+ return -1;
+ }
+ ctdb_ctrl_createdb(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn, mem_ctx, name);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to create remote db:%s\n", name));
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ ensure we are attached to any databases that anyone else is attached to
+ */
+static int create_missing_local_databases(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
+ uint32_t vnn, struct ctdb_dbid_map **dbmap, TALLOC_CTX *mem_ctx)
+{
+ int i, j, db, ret;
+ struct ctdb_dbid_map *remote_dbmap;
+
+ /* verify that we have all database any other node has */
+ for (j=0; j<nodemap->num; j++) {
+ /* we dont need to ourself ourselves */
+ if (nodemap->nodes[j].vnn == vnn) {
+ continue;
+ }
+ /* dont check nodes that are unavailable */
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+
+ ret = ctdb_ctrl_getdbmap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn,
+ mem_ctx, &remote_dbmap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get dbids from node %u\n", vnn));
+ return -1;
+ }
+
+ /* step through all databases on the remote node */
+ for (db=0; db<remote_dbmap->num;db++) {
+ const char *name;
+
+ for (i=0;i<(*dbmap)->num;i++) {
+ if (remote_dbmap->dbids[db] == (*dbmap)->dbids[i]) {
+ break;
+ }
+ }
+ /* we already have this db locally */
+ if (i!=(*dbmap)->num) {
+ continue;
+ }
+ /* ok so we need to create this database and
+ rebuild dbmap
+ */
+ ctdb_ctrl_getdbname(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn,
+ remote_dbmap->dbids[db], mem_ctx, &name);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get dbname from node %u\n",
+ nodemap->nodes[j].vnn));
+ return -1;
+ }
+ ctdb_ctrl_createdb(ctdb, CONTROL_TIMEOUT(), vnn, mem_ctx, name);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to create local db:%s\n", name));
+ return -1;
+ }
+ ret = ctdb_ctrl_getdbmap(ctdb, CONTROL_TIMEOUT(), vnn, mem_ctx, dbmap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to reread dbmap on node %u\n", vnn));
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ pull all the remote database contents into ours
+ */
+static int pull_all_remote_databases(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
+ uint32_t vnn, struct ctdb_dbid_map *dbmap, TALLOC_CTX *mem_ctx)
+{
+ int i, j, ret;
+
+ /* pull all records from all other nodes across onto this node
+ (this merges based on rsn)
+ */
+ for (i=0;i<dbmap->num;i++) {
+ for (j=0; j<nodemap->num; j++) {
+ /* we dont need to merge with ourselves */
+ if (nodemap->nodes[j].vnn == vnn) {
+ continue;
+ }
+ /* dont merge from nodes that are unavailable */
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+ ret = ctdb_ctrl_copydb(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn,
+ vnn, dbmap->dbids[i], CTDB_LMASTER_ANY, mem_ctx);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to copy db from node %u to node %u\n",
+ nodemap->nodes[j].vnn, vnn));
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ change the dmaster on all databases to point to us
+ */
+static int update_dmaster_on_all_databases(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
+ uint32_t vnn, struct ctdb_dbid_map *dbmap, TALLOC_CTX *mem_ctx)
+{
+ int i, j, ret;
+
+ /* update dmaster to point to this node for all databases/nodes */
+ for (i=0;i<dbmap->num;i++) {
+ for (j=0; j<nodemap->num; j++) {
+ /* dont repoint nodes that are unavailable */
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+ ret = ctdb_ctrl_setdmaster(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn, ctdb, dbmap->dbids[i], vnn);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to set dmaster for node %u db:0x%08x\n", nodemap->nodes[j].vnn, dbmap->dbids[i]));
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ update flags on all active nodes
+ */
+static int update_flags_on_all_nodes(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap)
+{
+ int i;
+ for (i=0;i<nodemap->num;i++) {
+ struct ctdb_node_flag_change c;
+ TDB_DATA data;
+
+ c.vnn = nodemap->nodes[i].vnn;
+ c.flags = nodemap->nodes[i].flags;
+
+ data.dptr = (uint8_t *)&c;
+ data.dsize = sizeof(c);
+
+ ctdb_send_message(ctdb, CTDB_BROADCAST_CONNECTED,
+ CTDB_SRVID_NODE_FLAGS_CHANGED, data);
+
+ }
+ return 0;
+}
+
+/*
+ vacuum one database
+ */
+static int vacuum_db(struct ctdb_context *ctdb, uint32_t db_id, struct ctdb_node_map *nodemap)
+{
+ uint64_t max_rsn;
+ int ret, i;
+
+ /* find max rsn on our local node for this db */
+ ret = ctdb_ctrl_get_max_rsn(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, db_id, &max_rsn);
+ if (ret != 0) {
+ return -1;
+ }
+
+ /* set rsn on non-empty records to max_rsn+1 */
+ for (i=0;i<nodemap->num;i++) {
+ if (nodemap->nodes[i].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+ ret = ctdb_ctrl_set_rsn_nonempty(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[i].vnn,
+ db_id, max_rsn+1);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " Failed to set rsn on node %u to %llu\n",
+ nodemap->nodes[i].vnn, (unsigned long long)max_rsn+1));
+ return -1;
+ }
+ }
+
+ /* delete records with rsn < max_rsn+1 on all nodes */
+ for (i=0;i<nodemap->num;i++) {
+ if (nodemap->nodes[i].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+ ret = ctdb_ctrl_delete_low_rsn(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[i].vnn,
+ db_id, max_rsn+1);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " Failed to delete records on node %u with rsn below %llu\n",
+ nodemap->nodes[i].vnn, (unsigned long long)max_rsn+1));
+ return -1;
+ }
+ }
+
+
+ return 0;
+}
+
+
+/*
+ vacuum all attached databases
+ */
+static int vacuum_all_databases(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
+ struct ctdb_dbid_map *dbmap)
+{
+ int i;
+
+ /* update dmaster to point to this node for all databases/nodes */
+ for (i=0;i<dbmap->num;i++) {
+ if (vacuum_db(ctdb, dbmap->dbids[i], nodemap) != 0) {
+ return -1;
+ }
+ }
+ return 0;
+}
+
+
+/*
+ push out all our database contents to all other nodes
+ */
+static int push_all_local_databases(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
+ uint32_t vnn, struct ctdb_dbid_map *dbmap, TALLOC_CTX *mem_ctx)
+{
+ int i, j, ret;
+
+ /* push all records out to the nodes again */
+ for (i=0;i<dbmap->num;i++) {
+ for (j=0; j<nodemap->num; j++) {
+ /* we dont need to push to ourselves */
+ if (nodemap->nodes[j].vnn == vnn) {
+ continue;
+ }
+ /* dont push to nodes that are unavailable */
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+ ret = ctdb_ctrl_copydb(ctdb, CONTROL_TIMEOUT(), vnn, nodemap->nodes[j].vnn,
+ dbmap->dbids[i], CTDB_LMASTER_ANY, mem_ctx);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to copy db from node %u to node %u\n",
+ vnn, nodemap->nodes[j].vnn));
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ ensure all nodes have the same vnnmap we do
+ */
+static int update_vnnmap_on_all_nodes(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
+ uint32_t vnn, struct ctdb_vnn_map *vnnmap, TALLOC_CTX *mem_ctx)
+{
+ int j, ret;
+
+ /* push the new vnn map out to all the nodes */
+ for (j=0; j<nodemap->num; j++) {
+ /* dont push to nodes that are unavailable */
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+
+ ret = ctdb_ctrl_setvnnmap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn, mem_ctx, vnnmap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to set vnnmap for node %u\n", vnn));
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ handler for when the admin bans a node
+*/
+static void ban_handler(struct ctdb_context *ctdb, uint64_t srvid,
+ TDB_DATA data, void *private_data)
+{
+ struct ctdb_recoverd *rec = talloc_get_type(private_data, struct ctdb_recoverd);
+ struct ctdb_ban_info *b = (struct ctdb_ban_info *)data.dptr;
+ uint32_t recmaster;
+ int ret;
+
+ if (data.dsize != sizeof(*b)) {
+ DEBUG(0,("Bad data in ban_handler\n"));
+ return;
+ }
+
+ ret = ctdb_ctrl_getrecmaster(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, &recmaster);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " Failed to find the recmaster\n"));
+ return;
+ }
+
+ if (recmaster != ctdb->vnn) {
+ DEBUG(0,("We are not the recmaster - ignoring ban request\n"));
+ return;
+ }
+
+ DEBUG(0,("Node %u has been banned for %u seconds by the administrator\n",
+ b->vnn, b->ban_time));
+ ctdb_ban_node(rec, b->vnn, b->ban_time);
+}
+
+/*
+ handler for when the admin unbans a node
+*/
+static void unban_handler(struct ctdb_context *ctdb, uint64_t srvid,
+ TDB_DATA data, void *private_data)
+{
+ struct ctdb_recoverd *rec = talloc_get_type(private_data, struct ctdb_recoverd);
+ uint32_t vnn;
+ int ret;
+ uint32_t recmaster;
+
+ if (data.dsize != sizeof(uint32_t)) {
+ DEBUG(0,("Bad data in unban_handler\n"));
+ return;
+ }
+ vnn = *(uint32_t *)data.dptr;
+
+ ret = ctdb_ctrl_getrecmaster(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, &recmaster);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " Failed to find the recmaster\n"));
+ return;
+ }
+
+ if (recmaster != ctdb->vnn) {
+ DEBUG(0,("We are not the recmaster - ignoring unban request\n"));
+ return;
+ }
+
+ DEBUG(0,("Node %u has been unbanned by the administrator\n", vnn));
+ ctdb_unban_node(rec, vnn);
+}
+
+
+
+/*
+ called when ctdb_wait_timeout should finish
+ */
+static void ctdb_wait_handler(struct event_context *ev, struct timed_event *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, uint32_t secs)
+{
+ uint32_t timed_out = 0;
+ event_add_timed(ctdb->ev, ctdb, timeval_current_ofs(secs, 0), ctdb_wait_handler, &timed_out);
+ while (!timed_out) {
+ event_loop_once(ctdb->ev);
+ }
+}
+
+/*
+ we are the recmaster, and recovery is needed - start a recovery run
+ */
+static int do_recovery(struct ctdb_recoverd *rec,
+ TALLOC_CTX *mem_ctx, uint32_t vnn, uint32_t num_active,
+ struct ctdb_node_map *nodemap, struct ctdb_vnn_map *vnnmap,
+ uint32_t culprit)
+{
+ struct ctdb_context *ctdb = rec->ctdb;
+ int i, j, ret;
+ uint32_t generation;
+ struct ctdb_dbid_map *dbmap;
+
+ if (rec->last_culprit != culprit ||
+ timeval_elapsed(&rec->first_recover_time) > ctdb->tunable.recovery_grace_period) {
+ /* either a new node is the culprit, or we've decide to forgive them */
+ rec->last_culprit = culprit;
+ rec->first_recover_time = timeval_current();
+ rec->culprit_counter = 0;
+ }
+ rec->culprit_counter++;
+
+ if (rec->culprit_counter > 2*nodemap->num) {
+ DEBUG(0,("Node %u has caused %u recoveries in %.0f seconds - banning it for %u seconds\n",
+ culprit, rec->culprit_counter, timeval_elapsed(&rec->first_recover_time),
+ ctdb->tunable.recovery_ban_period));
+ ctdb_ban_node(rec, culprit, ctdb->tunable.recovery_ban_period);
+ }
+
+ if (!ctdb_recovery_lock(ctdb, true)) {
+ DEBUG(0,("Unable to get recovery lock - aborting recovery\n"));
+ return -1;
+ }
+
+ /* set recovery mode to active on all nodes */
+ ret = set_recovery_mode(ctdb, nodemap, CTDB_RECOVERY_ACTIVE);
+ if (ret!=0) {
+ DEBUG(0, (__location__ " Unable to set recovery mode to active on cluster\n"));
+ return -1;
+ }
+
+ DEBUG(0, (__location__ " Recovery initiated due to problem with node %u\n", culprit));
+
+ /* pick a new generation number */
+ generation = random();
+
+ /* change the vnnmap on this node to use the new generation
+ number but not on any other nodes.
+ this guarantees that if we abort the recovery prematurely
+ for some reason (a node stops responding?)
+ that we can just return immediately and we will reenter
+ recovery shortly again.
+ I.e. we deliberately leave the cluster with an inconsistent
+ generation id to allow us to abort recovery at any stage and
+ just restart it from scratch.
+ */
+ vnnmap->generation = generation;
+ ret = ctdb_ctrl_setvnnmap(ctdb, CONTROL_TIMEOUT(), vnn, mem_ctx, vnnmap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to set vnnmap for node %u\n", vnn));
+ return -1;
+ }
+
+ /* get a list of all databases */
+ ret = ctdb_ctrl_getdbmap(ctdb, CONTROL_TIMEOUT(), vnn, mem_ctx, &dbmap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get dbids from node :%u\n", vnn));
+ return -1;
+ }
+
+
+
+ /* verify that all other nodes have all our databases */
+ ret = create_missing_remote_databases(ctdb, nodemap, vnn, dbmap, mem_ctx);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to create missing remote databases\n"));
+ return -1;
+ }
+
+ /* verify that we have all the databases any other node has */
+ ret = create_missing_local_databases(ctdb, nodemap, vnn, &dbmap, mem_ctx);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to create missing local databases\n"));
+ return -1;
+ }
+
+
+
+ /* verify that all other nodes have all our databases */
+ ret = create_missing_remote_databases(ctdb, nodemap, vnn, dbmap, mem_ctx);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to create missing remote databases\n"));
+ return -1;
+ }
+
+
+ DEBUG(1, (__location__ " Recovery - created remote databases\n"));
+
+ /* pull all remote databases onto the local node */
+ ret = pull_all_remote_databases(ctdb, nodemap, vnn, dbmap, mem_ctx);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to pull remote databases\n"));
+ return -1;
+ }
+
+ DEBUG(1, (__location__ " Recovery - pulled remote databases\n"));
+
+ /* push all local databases to the remote nodes */
+ ret = push_all_local_databases(ctdb, nodemap, vnn, dbmap, mem_ctx);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to push local databases\n"));
+ return -1;
+ }
+
+ DEBUG(1, (__location__ " Recovery - pushed remote databases\n"));
+
+ /* build a new vnn map with all the currently active and
+ unbanned nodes */
+ generation = random();
+ vnnmap = talloc(mem_ctx, struct ctdb_vnn_map);
+ CTDB_NO_MEMORY(ctdb, vnnmap);
+ vnnmap->generation = generation;
+ vnnmap->size = num_active;
+ vnnmap->map = talloc_zero_array(vnnmap, uint32_t, vnnmap->size);
+ for (i=j=0;i<nodemap->num;i++) {
+ if (!(nodemap->nodes[i].flags & NODE_FLAGS_INACTIVE)) {
+ vnnmap->map[j++] = nodemap->nodes[i].vnn;
+ }
+ }
+
+
+
+ /* update to the new vnnmap on all nodes */
+ ret = update_vnnmap_on_all_nodes(ctdb, nodemap, vnn, vnnmap, mem_ctx);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to update vnnmap on all nodes\n"));
+ return -1;
+ }
+
+ DEBUG(1, (__location__ " Recovery - updated vnnmap\n"));
+
+ /* update recmaster to point to us for all nodes */
+ ret = set_recovery_master(ctdb, nodemap, vnn);
+ if (ret!=0) {
+ DEBUG(0, (__location__ " Unable to set recovery master\n"));
+ return -1;
+ }
+
+ DEBUG(1, (__location__ " Recovery - updated recmaster\n"));
+
+ /* repoint all local and remote database records to the local
+ node as being dmaster
+ */
+ ret = update_dmaster_on_all_databases(ctdb, nodemap, vnn, dbmap, mem_ctx);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to update dmaster on all databases\n"));
+ return -1;
+ }
+
+ DEBUG(1, (__location__ " Recovery - updated dmaster on all databases\n"));
+
+ /*
+ update all nodes to have the same flags that we have
+ */
+ ret = update_flags_on_all_nodes(ctdb, nodemap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to update flags on all nodes\n"));
+ return -1;
+ }
+
+ DEBUG(1, (__location__ " Recovery - updated flags\n"));
+
+ /*
+ run a vacuum operation on empty records
+ */
+ ret = vacuum_all_databases(ctdb, nodemap, dbmap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to vacuum all databases\n"));
+ return -1;
+ }
+
+ DEBUG(1, (__location__ " Recovery - vacuumed all databases\n"));
+
+ /*
+ if enabled, tell nodes to takeover their public IPs
+ */
+ if (ctdb->takeover.enabled) {
+ ret = ctdb_takeover_run(ctdb, nodemap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to setup public takeover addresses\n"));
+ return -1;
+ }
+ DEBUG(1, (__location__ " Recovery - done takeover\n"));
+ }
+
+
+ /* disable recovery mode */
+ ret = set_recovery_mode(ctdb, nodemap, CTDB_RECOVERY_NORMAL);
+ if (ret!=0) {
+ DEBUG(0, (__location__ " Unable to set recovery mode to normal on cluster\n"));
+ return -1;
+ }
+
+ /* send a message to all clients telling them that the cluster
+ has been reconfigured */
+ ctdb_send_message(ctdb, CTDB_BROADCAST_ALL, CTDB_SRVID_RECONFIGURE, tdb_null);
+
+ DEBUG(0, (__location__ " Recovery complete\n"));
+
+ /* We just finished a recovery successfully.
+ We now wait for rerecovery_timeout before we allow
+ another recovery to take place.
+ */
+ DEBUG(0, (__location__ " New recoveries supressed for the rerecovery timeout\n"));
+ ctdb_wait_timeout(ctdb, ctdb->tunable.rerecovery_timeout);
+ DEBUG(0, (__location__ " Rerecovery timeout elapsed. Recovery reactivated.\n"));
+
+ return 0;
+}
+
+
+/*
+ elections are won by first checking the number of connected nodes, then
+ the priority time, then the vnn
+ */
+struct election_message {
+ uint32_t num_connected;
+ struct timeval priority_time;
+ uint32_t vnn;
+};
+
+/*
+ form this nodes election data
+ */
+static void ctdb_election_data(struct ctdb_recoverd *rec, struct election_message *em)
+{
+ int ret, i;
+ struct ctdb_node_map *nodemap;
+ struct ctdb_context *ctdb = rec->ctdb;
+
+ ZERO_STRUCTP(em);
+
+ em->vnn = rec->ctdb->vnn;
+ em->priority_time = rec->priority_time;
+
+ ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, rec, &nodemap);
+ if (ret != 0) {
+ return;
+ }
+
+ for (i=0;i<nodemap->num;i++) {
+ if (!(nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED)) {
+ em->num_connected++;
+ }
+ }
+ 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;
+
+ ctdb_election_data(rec, &myem);
+
+ /* try to use the most connected node */
+ cmp = (int)myem.num_connected - (int)em->num_connected;
+
+ /* then the longest running node */
+ if (cmp == 0) {
+ cmp = timeval_compare(&em->priority_time, &myem.priority_time);
+ }
+
+ if (cmp == 0) {
+ cmp = (int)myem.vnn - (int)em->vnn;
+ }
+
+ return cmp > 0;
+}
+
+/*
+ send out an election request
+ */
+static int send_election_request(struct ctdb_recoverd *rec, TALLOC_CTX *mem_ctx, uint32_t vnn)
+{
+ int ret;
+ TDB_DATA election_data;
+ struct election_message emsg;
+ uint64_t srvid;
+ struct ctdb_context *ctdb = rec->ctdb;
+
+ srvid = CTDB_SRVID_RECOVERY;
+
+ ctdb_election_data(rec, &emsg);
+
+ election_data.dsize = sizeof(struct election_message);
+ election_data.dptr = (unsigned char *)&emsg;
+
+
+ /* first we assume we will win the election and set
+ recoverymaster to be ourself on the current node
+ */
+ ret = ctdb_ctrl_setrecmaster(ctdb, CONTROL_TIMEOUT(), vnn, vnn);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " failed to send recmaster election request\n"));
+ return -1;
+ }
+
+
+ /* send an election message to all active nodes */
+ ctdb_send_message(ctdb, CTDB_BROADCAST_ALL, srvid, election_data);
+
+ return 0;
+}
+
+/*
+ this function will unban all nodes in the cluster
+*/
+static void unban_all_nodes(struct ctdb_context *ctdb)
+{
+ int ret, i;
+ struct ctdb_node_map *nodemap;
+ TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
+
+ ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, tmp_ctx, &nodemap);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " failed to get nodemap to unban all nodes\n"));
+ return;
+ }
+
+ for (i=0;i<nodemap->num;i++) {
+ if ( (!(nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED))
+ && (nodemap->nodes[i].flags & NODE_FLAGS_BANNED) ) {
+ ctdb_ctrl_modflags(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[i].vnn, 0, NODE_FLAGS_BANNED);
+ }
+ }
+
+ talloc_free(tmp_ctx);
+}
+
+/*
+ handler for recovery master elections
+*/
+static void election_handler(struct ctdb_context *ctdb, uint64_t srvid,
+ TDB_DATA data, void *private_data)
+{
+ struct ctdb_recoverd *rec = talloc_get_type(private_data, struct ctdb_recoverd);
+ int ret;
+ struct election_message *em = (struct election_message *)data.dptr;
+ TALLOC_CTX *mem_ctx;
+
+ mem_ctx = talloc_new(ctdb);
+
+ /* 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)) {
+ ret = send_election_request(rec, mem_ctx, ctdb_get_vnn(ctdb));
+ if (ret!=0) {
+ DEBUG(0, (__location__ " failed to initiate recmaster election"));
+ }
+ talloc_free(mem_ctx);
+ /*unban_all_nodes(ctdb);*/
+ return;
+ }
+
+ /* release the recmaster lock */
+ if (em->vnn != ctdb->vnn &&
+ ctdb->recovery_lock_fd != -1) {
+ close(ctdb->recovery_lock_fd);
+ ctdb->recovery_lock_fd = -1;
+ unban_all_nodes(ctdb);
+ }
+
+ /* ok, let that guy become recmaster then */
+ ret = ctdb_ctrl_setrecmaster(ctdb, CONTROL_TIMEOUT(), ctdb_get_vnn(ctdb), em->vnn);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " failed to send recmaster election request"));
+ talloc_free(mem_ctx);
+ return;
+ }
+
+ /* release any bans */
+ rec->last_culprit = (uint32_t)-1;
+ talloc_free(rec->banned_nodes);
+ rec->banned_nodes = talloc_zero_array(rec, struct ban_state *, ctdb->num_nodes);
+ CTDB_NO_MEMORY_FATAL(ctdb, rec->banned_nodes);
+
+ talloc_free(mem_ctx);
+ return;
+}
+
+
+/*
+ force the start of the election process
+ */
+static void force_election(struct ctdb_recoverd *rec, TALLOC_CTX *mem_ctx, uint32_t vnn,
+ struct ctdb_node_map *nodemap)
+{
+ int ret;
+ struct ctdb_context *ctdb = rec->ctdb;
+
+ /* set all nodes to recovery mode to stop all internode traffic */
+ ret = set_recovery_mode(ctdb, nodemap, CTDB_RECOVERY_ACTIVE);
+ if (ret!=0) {
+ DEBUG(0, (__location__ " Unable to set recovery mode to active on cluster\n"));
+ return;
+ }
+
+ ret = send_election_request(rec, mem_ctx, vnn);
+ if (ret!=0) {
+ DEBUG(0, (__location__ " failed to initiate recmaster election"));
+ return;
+ }
+
+ /* wait for a few seconds to collect all responses */
+ ctdb_wait_timeout(ctdb, ctdb->tunable.election_timeout);
+}
+
+
+
+/*
+ handler for when a node changes its flags
+*/
+static void monitor_handler(struct ctdb_context *ctdb, uint64_t srvid,
+ TDB_DATA data, void *private_data)
+{
+ int ret;
+ struct ctdb_node_flag_change *c = (struct ctdb_node_flag_change *)data.dptr;
+ struct ctdb_node_map *nodemap=NULL;
+ TALLOC_CTX *tmp_ctx;
+ int i;
+
+ if (data.dsize != sizeof(*c)) {
+ DEBUG(0,(__location__ "Invalid data in ctdb_node_flag_change\n"));
+ return;
+ }
+
+ tmp_ctx = talloc_new(ctdb);
+ CTDB_NO_MEMORY_VOID(ctdb, tmp_ctx);
+
+ ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, tmp_ctx, &nodemap);
+
+ for (i=0;i<nodemap->num;i++) {
+ if (nodemap->nodes[i].vnn == c->vnn) break;
+ }
+
+ if (i == nodemap->num) {
+ DEBUG(0,(__location__ "Flag change for non-existant node %u\n", c->vnn));
+ talloc_free(tmp_ctx);
+ return;
+ }
+
+ /* Dont let messages from remote nodes change the DISCONNECTED flag.
+ This flag is handled locally based on whether the local node
+ can communicate with the node or not.
+ */
+ c->flags &= ~NODE_FLAGS_DISCONNECTED;
+ if (nodemap->nodes[i].flags&NODE_FLAGS_DISCONNECTED) {
+ c->flags |= NODE_FLAGS_DISCONNECTED;
+ }
+
+ if (nodemap->nodes[i].flags != c->flags) {
+ DEBUG(0,("Node %u has changed flags - now 0x%x\n", c->vnn, c->flags));
+ }
+
+ nodemap->nodes[i].flags = c->flags;
+
+ ret = ctdb_ctrl_getrecmaster(ctdb, CONTROL_TIMEOUT(),
+ CTDB_CURRENT_NODE, &ctdb->recovery_master);
+
+ if (ret == 0) {
+ ret = ctdb_ctrl_getrecmode(ctdb, CONTROL_TIMEOUT(),
+ CTDB_CURRENT_NODE, &ctdb->recovery_mode);
+ }
+
+ if (ret == 0 &&
+ ctdb->recovery_master == ctdb->vnn &&
+ ctdb->recovery_mode == CTDB_RECOVERY_NORMAL &&
+ ctdb->takeover.enabled) {
+ ret = ctdb_takeover_run(ctdb, nodemap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to setup public takeover addresses\n"));
+ }
+ }
+
+ talloc_free(tmp_ctx);
+}
+
+
+
+/*
+ the main monitoring loop
+ */
+static void monitor_cluster(struct ctdb_context *ctdb)
+{
+ uint32_t vnn, num_active, recmode, recmaster;
+ TALLOC_CTX *mem_ctx=NULL;
+ struct ctdb_node_map *nodemap=NULL;
+ struct ctdb_node_map *remote_nodemap=NULL;
+ struct ctdb_vnn_map *vnnmap=NULL;
+ struct ctdb_vnn_map *remote_vnnmap=NULL;
+ int i, j, ret;
+ bool need_takeover_run;
+ struct ctdb_recoverd *rec;
+
+ rec = talloc_zero(ctdb, struct ctdb_recoverd);
+ CTDB_NO_MEMORY_FATAL(ctdb, rec);
+
+ rec->ctdb = ctdb;
+ rec->banned_nodes = talloc_zero_array(rec, struct ban_state *, ctdb->num_nodes);
+ CTDB_NO_MEMORY_FATAL(ctdb, rec->banned_nodes);
+
+ rec->priority_time = timeval_current();
+
+ /* register a message port for recovery elections */
+ ctdb_set_message_handler(ctdb, CTDB_SRVID_RECOVERY, election_handler, rec);
+
+ /* and one for when nodes are disabled/enabled */
+ ctdb_set_message_handler(ctdb, CTDB_SRVID_NODE_FLAGS_CHANGED, monitor_handler, rec);
+
+ /* and one for when nodes are banned */
+ ctdb_set_message_handler(ctdb, CTDB_SRVID_BAN_NODE, ban_handler, rec);
+
+ /* and one for when nodes are unbanned */
+ ctdb_set_message_handler(ctdb, CTDB_SRVID_UNBAN_NODE, unban_handler, rec);
+
+again:
+ need_takeover_run = false;
+
+ if (mem_ctx) {
+ talloc_free(mem_ctx);
+ mem_ctx = NULL;
+ }
+ mem_ctx = talloc_new(ctdb);
+ if (!mem_ctx) {
+ DEBUG(0,("Failed to create temporary context\n"));
+ exit(-1);
+ }
+
+ /* we only check for recovery once every second */
+ ctdb_wait_timeout(ctdb, ctdb->tunable.recover_interval);
+
+ /* get relevant tunables */
+ ret = ctdb_ctrl_get_all_tunables(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE, &ctdb->tunable);
+ if (ret != 0) {
+ DEBUG(0,("Failed to get tunables - retrying\n"));
+ goto again;
+ }
+
+ vnn = ctdb_ctrl_getvnn(ctdb, CONTROL_TIMEOUT(), CTDB_CURRENT_NODE);
+ if (vnn == (uint32_t)-1) {
+ DEBUG(0,("Failed to get local vnn - retrying\n"));
+ goto again;
+ }
+
+ /* get the vnnmap */
+ ret = ctdb_ctrl_getvnnmap(ctdb, CONTROL_TIMEOUT(), vnn, mem_ctx, &vnnmap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get vnnmap from node %u\n", vnn));
+ goto again;
+ }
+
+
+ /* get number of nodes */
+ ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), vnn, mem_ctx, &nodemap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get nodemap from node %u\n", vnn));
+ goto again;
+ }
+
+
+ /* count how many active nodes there are */
+ num_active = 0;
+ for (i=0; i<nodemap->num; i++) {
+ if (rec->banned_nodes[nodemap->nodes[i].vnn] != NULL) {
+ nodemap->nodes[i].flags |= NODE_FLAGS_BANNED;
+ } else {
+ nodemap->nodes[i].flags &= ~NODE_FLAGS_BANNED;
+ }
+ if (!(nodemap->nodes[i].flags & NODE_FLAGS_INACTIVE)) {
+ num_active++;
+ }
+ }
+
+
+ /* check which node is the recovery master */
+ ret = ctdb_ctrl_getrecmaster(ctdb, CONTROL_TIMEOUT(), vnn, &recmaster);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get recmaster from node %u\n", vnn));
+ goto again;
+ }
+
+ if (recmaster == (uint32_t)-1) {
+ DEBUG(0,(__location__ " Initial recovery master set - forcing election\n"));
+ force_election(rec, mem_ctx, vnn, nodemap);
+ goto again;
+ }
+
+ /* verify that the recmaster node is still active */
+ for (j=0; j<nodemap->num; j++) {
+ if (nodemap->nodes[j].vnn==recmaster) {
+ break;
+ }
+ }
+
+ if (j == nodemap->num) {
+ DEBUG(0, ("Recmaster node %u not in list. Force reelection\n", recmaster));
+ force_election(rec, mem_ctx, vnn, nodemap);
+ goto again;
+ }
+
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ DEBUG(0, ("Recmaster node %u no longer available. Force reelection\n", nodemap->nodes[j].vnn));
+ force_election(rec, mem_ctx, vnn, nodemap);
+ goto again;
+ }
+
+
+ /* if we are not the recmaster then we do not need to check
+ if recovery is needed
+ */
+ if (vnn!=recmaster) {
+ goto again;
+ }
+
+
+ /* verify that all active nodes agree that we are the recmaster */
+ for (j=0; j<nodemap->num; j++) {
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+ if (nodemap->nodes[j].vnn == vnn) {
+ continue;
+ }
+
+ ret = ctdb_ctrl_getrecmaster(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn, &recmaster);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get recmaster from node %u\n", vnn));
+ goto again;
+ }
+
+ if (recmaster!=vnn) {
+ DEBUG(0, ("Node %u does not agree we are the recmaster. Force reelection\n",
+ nodemap->nodes[j].vnn));
+ force_election(rec, mem_ctx, vnn, nodemap);
+ goto again;
+ }
+ }
+
+
+ /* verify that all active nodes are in normal mode
+ and not in recovery mode
+ */
+ for (j=0; j<nodemap->num; j++) {
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+
+ ret = ctdb_ctrl_getrecmode(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn, &recmode);
+ if (ret != 0) {
+ DEBUG(0, ("Unable to get recmode from node %u\n", vnn));
+ goto again;
+ }
+ if (recmode != CTDB_RECOVERY_NORMAL) {
+ DEBUG(0, (__location__ " Node:%u was in recovery mode. Restart recovery process\n",
+ nodemap->nodes[j].vnn));
+ do_recovery(rec, mem_ctx, vnn, num_active, nodemap, vnnmap, nodemap->nodes[j].vnn);
+ goto again;
+ }
+ }
+
+
+ /* get the nodemap for all active remote nodes and verify
+ they are the same as for this node
+ */
+ for (j=0; j<nodemap->num; j++) {
+ if (nodemap->nodes[j].flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+ if (nodemap->nodes[j].vnn == vnn) {
+ continue;
+ }
+
+ ret = ctdb_ctrl_getnodemap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn,
+ mem_ctx, &remote_nodemap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get nodemap from remote node %u\n",
+ nodemap->nodes[j].vnn));
+ goto again;
+ }
+
+ /* if the nodes disagree on how many nodes there are
+ then this is a good reason to try recovery
+ */
+ if (remote_nodemap->num != nodemap->num) {
+ DEBUG(0, (__location__ " Remote node:%u has different node count. %u vs %u of the local node\n",
+ nodemap->nodes[j].vnn, remote_nodemap->num, nodemap->num));
+ do_recovery(rec, mem_ctx, vnn, num_active, nodemap, vnnmap, nodemap->nodes[j].vnn);
+ goto again;
+ }
+
+ /* 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_nodemap->nodes[i].vnn != nodemap->nodes[i].vnn) {
+ DEBUG(0, (__location__ " Remote node:%u has different nodemap vnn for %d (%u vs %u).\n",
+ nodemap->nodes[j].vnn, i,
+ remote_nodemap->nodes[i].vnn, nodemap->nodes[i].vnn));
+ do_recovery(rec, mem_ctx, vnn, num_active, nodemap,
+ vnnmap, nodemap->nodes[j].vnn);
+ goto again;
+ }
+ if ((remote_nodemap->nodes[i].flags & NODE_FLAGS_INACTIVE) !=
+ (nodemap->nodes[i].flags & NODE_FLAGS_INACTIVE)) {
+ DEBUG(0, (__location__ " Remote node:%u has different nodemap flag for %d (0x%x vs 0x%x)\n",
+ nodemap->nodes[j].vnn, i,
+ remote_nodemap->nodes[i].flags, nodemap->nodes[i].flags));
+ do_recovery(rec, mem_ctx, vnn, num_active, nodemap,
+ vnnmap, nodemap->nodes[j].vnn);
+ goto again;
+ }
+ }
+
+ /* update our nodemap flags according to the other
+ server - this gets the NODE_FLAGS_DISABLED
+ flag. Note that the remote node is authoritative
+ for its flags (except CONNECTED, which we know
+ matches in this code) */
+ if (nodemap->nodes[j].flags != remote_nodemap->nodes[j].flags) {
+ nodemap->nodes[j].flags = remote_nodemap->nodes[j].flags;
+ need_takeover_run = true;
+ }
+ }
+
+
+ /* there better be the same number of lmasters in the vnn map
+ as there are active nodes or we will have to do a recovery
+ */
+ if (vnnmap->size != num_active) {
+ DEBUG(0, (__location__ " The vnnmap count is different from the number of active nodes. %u vs %u\n",
+ vnnmap->size, num_active));
+ do_recovery(rec, mem_ctx, vnn, num_active, nodemap, vnnmap, ctdb->vnn);
+ goto again;
+ }
+
+ /* verify that all active 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 (nodemap->nodes[j].vnn == vnn) {
+ continue;
+ }
+
+ for (i=0; i<vnnmap->size; i++) {
+ if (vnnmap->map[i] == nodemap->nodes[j].vnn) {
+ break;
+ }
+ }
+ if (i == vnnmap->size) {
+ DEBUG(0, (__location__ " Node %u is active in the nodemap but did not exist in the vnnmap\n",
+ nodemap->nodes[j].vnn));
+ do_recovery(rec, mem_ctx, vnn, num_active, nodemap, vnnmap, nodemap->nodes[j].vnn);
+ goto again;
+ }
+ }
+
+
+ /* 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].vnn == vnn) {
+ continue;
+ }
+
+ ret = ctdb_ctrl_getvnnmap(ctdb, CONTROL_TIMEOUT(), nodemap->nodes[j].vnn,
+ mem_ctx, &remote_vnnmap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to get vnnmap from remote node %u\n",
+ nodemap->nodes[j].vnn));
+ goto again;
+ }
+
+ /* verify the vnnmap generation is the same */
+ if (vnnmap->generation != remote_vnnmap->generation) {
+ DEBUG(0, (__location__ " Remote node %u has different generation of vnnmap. %u vs %u (ours)\n",
+ nodemap->nodes[j].vnn, remote_vnnmap->generation, vnnmap->generation));
+ do_recovery(rec, mem_ctx, vnn, num_active, nodemap, vnnmap, nodemap->nodes[j].vnn);
+ goto again;
+ }
+
+ /* verify the vnnmap size is the same */
+ if (vnnmap->size != remote_vnnmap->size) {
+ DEBUG(0, (__location__ " Remote node %u has different size of vnnmap. %u vs %u (ours)\n",
+ nodemap->nodes[j].vnn, remote_vnnmap->size, vnnmap->size));
+ do_recovery(rec, mem_ctx, vnn, num_active, nodemap, vnnmap, nodemap->nodes[j].vnn);
+ goto again;
+ }
+
+ /* verify the vnnmap is the same */
+ for (i=0;i<vnnmap->size;i++) {
+ if (remote_vnnmap->map[i] != vnnmap->map[i]) {
+ DEBUG(0, (__location__ " Remote node %u has different vnnmap.\n",
+ nodemap->nodes[j].vnn));
+ do_recovery(rec, mem_ctx, vnn, num_active, nodemap,
+ vnnmap, nodemap->nodes[j].vnn);
+ goto again;
+ }
+ }
+ }
+
+ /* we might need to change who has what IP assigned */
+ if (need_takeover_run && ctdb->takeover.enabled) {
+ ret = ctdb_takeover_run(ctdb, nodemap);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Unable to setup public takeover addresses\n"));
+ }
+ }
+
+ goto again;
+
+}
+
+/*
+ event handler for when the main ctdbd dies
+ */
+static void ctdb_recoverd_parent(struct event_context *ev, struct fd_event *fde,
+ uint16_t flags, void *private_data)
+{
+ DEBUG(0,("recovery daemon parent died - exiting\n"));
+ _exit(1);
+}
+
+
+
+/*
+ startup the recovery daemon as a child of the main ctdb daemon
+ */
+int ctdb_start_recoverd(struct ctdb_context *ctdb)
+{
+ int ret;
+ int fd[2];
+ pid_t child;
+
+ if (pipe(fd) != 0) {
+ return -1;
+ }
+
+ child = fork();
+ if (child == -1) {
+ return -1;
+ }
+
+ if (child != 0) {
+ close(fd[0]);
+ return 0;
+ }
+
+ close(fd[1]);
+
+ /* shutdown the transport */
+ ctdb->methods->shutdown(ctdb);
+
+ /* get a new event context */
+ talloc_free(ctdb->ev);
+ ctdb->ev = event_context_init(ctdb);
+
+ event_add_fd(ctdb->ev, ctdb, fd[0], EVENT_FD_READ|EVENT_FD_AUTOCLOSE,
+ ctdb_recoverd_parent, &fd[0]);
+
+ close(ctdb->daemon.sd);
+ ctdb->daemon.sd = -1;
+
+ srandom(getpid() ^ time(NULL));
+
+ /* initialise ctdb */
+ ret = ctdb_socket_connect(ctdb);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " Failed to init ctdb\n"));
+ exit(1);
+ }
+
+ monitor_cluster(ctdb);
+
+ DEBUG(0,("ERROR: ctdb_recoverd finished!?\n"));
+ return -1;
+}
diff --git a/source4/cluster/ctdb/server/ctdb_server.c b/source4/cluster/ctdb/server/ctdb_server.c
new file mode 100644
index 0000000000..1480127327
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_server.c
@@ -0,0 +1,469 @@
+/*
+ ctdb main protocol code
+
+ Copyright (C) Andrew Tridgell 2006
+
+ 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 "lib/tdb/include/tdb.h"
+#include "lib/events/events.h"
+#include "lib/util/dlinklist.h"
+#include "system/network.h"
+#include "system/filesys.h"
+#include "../include/ctdb_private.h"
+
+/*
+ choose the transport we will use
+*/
+int ctdb_set_transport(struct ctdb_context *ctdb, const char *transport)
+{
+ ctdb->transport = talloc_strdup(ctdb, transport);
+ return 0;
+}
+
+/*
+ choose the recovery lock file
+*/
+int ctdb_set_recovery_lock_file(struct ctdb_context *ctdb, const char *file)
+{
+ ctdb->recovery_lock_file = talloc_strdup(ctdb, file);
+ return 0;
+}
+
+/*
+ choose the logfile location
+*/
+int ctdb_set_logfile(struct ctdb_context *ctdb, const char *logfile)
+{
+ ctdb->logfile = talloc_strdup(ctdb, logfile);
+ if (ctdb->logfile != NULL && strcmp(logfile, "-") != 0) {
+ int fd;
+ fd = open(ctdb->logfile, O_WRONLY|O_APPEND|O_CREAT, 0666);
+ if (fd == -1) {
+ printf("Failed to open logfile %s\n", ctdb->logfile);
+ abort();
+ }
+ close(1);
+ close(2);
+ if (fd != 1) {
+ dup2(fd, 1);
+ close(fd);
+ }
+ /* also catch stderr of subcommands to the log file */
+ dup2(1, 2);
+ }
+ return 0;
+}
+
+
+/*
+ set the directory for the local databases
+*/
+int ctdb_set_tdb_dir(struct ctdb_context *ctdb, const char *dir)
+{
+ ctdb->db_directory = talloc_strdup(ctdb, dir);
+ if (ctdb->db_directory == NULL) {
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ add a node to the list of active nodes
+*/
+static int ctdb_add_node(struct ctdb_context *ctdb, char *nstr)
+{
+ struct ctdb_node *node, **nodep;
+
+ nodep = talloc_realloc(ctdb, ctdb->nodes, struct ctdb_node *, ctdb->num_nodes+1);
+ CTDB_NO_MEMORY(ctdb, nodep);
+
+ ctdb->nodes = nodep;
+ nodep = &ctdb->nodes[ctdb->num_nodes];
+ (*nodep) = talloc_zero(ctdb->nodes, struct ctdb_node);
+ CTDB_NO_MEMORY(ctdb, *nodep);
+ node = *nodep;
+
+ if (ctdb_parse_address(ctdb, node, nstr, &node->address) != 0) {
+ return -1;
+ }
+ node->ctdb = ctdb;
+ node->name = talloc_asprintf(node, "%s:%u",
+ node->address.address,
+ node->address.port);
+ /* this assumes that the nodes are kept in sorted order, and no gaps */
+ node->vnn = ctdb->num_nodes;
+
+ /* nodes start out disconnected */
+ node->flags |= NODE_FLAGS_DISCONNECTED;
+
+ if (ctdb->address.address &&
+ ctdb_same_address(&ctdb->address, &node->address)) {
+ ctdb->vnn = node->vnn;
+ node->flags &= ~NODE_FLAGS_DISCONNECTED;
+ }
+
+ ctdb->num_nodes++;
+ node->dead_count = 0;
+
+ return 0;
+}
+
+/*
+ setup the node list from a file
+*/
+int ctdb_set_nlist(struct ctdb_context *ctdb, const char *nlist)
+{
+ char **lines;
+ int nlines;
+ int i;
+
+ talloc_free(ctdb->node_list_file);
+ ctdb->node_list_file = talloc_strdup(ctdb, nlist);
+
+ lines = file_lines_load(nlist, &nlines, ctdb);
+ if (lines == NULL) {
+ ctdb_set_error(ctdb, "Failed to load nlist '%s'\n", nlist);
+ return -1;
+ }
+ while (nlines > 0 && strcmp(lines[nlines-1], "") == 0) {
+ nlines--;
+ }
+
+ for (i=0;i<nlines;i++) {
+ if (ctdb_add_node(ctdb, lines[i]) != 0) {
+ talloc_free(lines);
+ return -1;
+ }
+ }
+
+ /* initialize the vnn mapping table now that we have num_nodes setup */
+/*
+XXX we currently initialize it to the maximum number of nodes to
+XXX make it behave the same way as previously.
+XXX Once we have recovery working we should initialize this always to
+XXX generation==0 (==invalid) and let the recovery tool populate this
+XXX table for the daemons.
+*/
+ ctdb->vnn_map = talloc(ctdb, struct ctdb_vnn_map);
+ CTDB_NO_MEMORY(ctdb, ctdb->vnn_map);
+
+ ctdb->vnn_map->generation = 1;
+ ctdb->vnn_map->size = ctdb->num_nodes;
+ ctdb->vnn_map->map = talloc_array(ctdb->vnn_map, uint32_t, ctdb->vnn_map->size);
+ CTDB_NO_MEMORY(ctdb, ctdb->vnn_map->map);
+
+ for(i=0;i<ctdb->vnn_map->size;i++) {
+ ctdb->vnn_map->map[i] = i;
+ }
+
+ talloc_free(lines);
+ return 0;
+}
+
+
+/*
+ setup the local node address
+*/
+int ctdb_set_address(struct ctdb_context *ctdb, const char *address)
+{
+ if (ctdb_parse_address(ctdb, ctdb, address, &ctdb->address) != 0) {
+ return -1;
+ }
+
+ ctdb->name = talloc_asprintf(ctdb, "%s:%u",
+ ctdb->address.address,
+ ctdb->address.port);
+ return 0;
+}
+
+
+/*
+ return the number of active nodes
+*/
+uint32_t ctdb_get_num_active_nodes(struct ctdb_context *ctdb)
+{
+ int i;
+ uint32_t count=0;
+ for (i=0;i<ctdb->vnn_map->size;i++) {
+ struct ctdb_node *node = ctdb->nodes[ctdb->vnn_map->map[i]];
+ if (!(node->flags & NODE_FLAGS_INACTIVE)) {
+ count++;
+ }
+ }
+ return count;
+}
+
+
+/*
+ called when we need to process a packet. This can be a requeued packet
+ after a lockwait, or a real packet from another node
+*/
+void ctdb_input_pkt(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
+{
+ TALLOC_CTX *tmp_ctx;
+
+ /* place the packet as a child of the tmp_ctx. We then use
+ talloc_free() below to free it. If any of the calls want
+ to keep it, then they will steal it somewhere else, and the
+ talloc_free() will only free the tmp_ctx */
+ tmp_ctx = talloc_new(ctdb);
+ talloc_steal(tmp_ctx, hdr);
+
+ DEBUG(3,(__location__ " ctdb request %u of type %u length %u from "
+ "node %u to %u\n", hdr->reqid, hdr->operation, hdr->length,
+ hdr->srcnode, hdr->destnode));
+
+ switch (hdr->operation) {
+ case CTDB_REQ_CALL:
+ case CTDB_REPLY_CALL:
+ case CTDB_REQ_DMASTER:
+ case CTDB_REPLY_DMASTER:
+ /* for ctdb_call inter-node operations verify that the
+ remote node that sent us the call is running in the
+ same generation instance as this node
+ */
+ if (ctdb->vnn_map->generation != hdr->generation) {
+ DEBUG(0,(__location__ " ctdb request %u"
+ " length %u from node %u to %u had an"
+ " invalid generation id:%u while our"
+ " generation id is:%u\n",
+ hdr->reqid, hdr->length,
+ hdr->srcnode, hdr->destnode,
+ hdr->generation, ctdb->vnn_map->generation));
+ goto done;
+ }
+ }
+
+ switch (hdr->operation) {
+ case CTDB_REQ_CALL:
+ ctdb->statistics.node.req_call++;
+ ctdb_request_call(ctdb, hdr);
+ break;
+
+ case CTDB_REPLY_CALL:
+ ctdb->statistics.node.reply_call++;
+ ctdb_reply_call(ctdb, hdr);
+ break;
+
+ case CTDB_REPLY_ERROR:
+ ctdb->statistics.node.reply_error++;
+ ctdb_reply_error(ctdb, hdr);
+ break;
+
+ case CTDB_REQ_DMASTER:
+ ctdb->statistics.node.req_dmaster++;
+ ctdb_request_dmaster(ctdb, hdr);
+ break;
+
+ case CTDB_REPLY_DMASTER:
+ ctdb->statistics.node.reply_dmaster++;
+ ctdb_reply_dmaster(ctdb, hdr);
+ break;
+
+ case CTDB_REQ_MESSAGE:
+ ctdb->statistics.node.req_message++;
+ ctdb_request_message(ctdb, hdr);
+ break;
+
+ case CTDB_REQ_CONTROL:
+ ctdb->statistics.node.req_control++;
+ ctdb_request_control(ctdb, hdr);
+ break;
+
+ case CTDB_REPLY_CONTROL:
+ ctdb->statistics.node.reply_control++;
+ ctdb_reply_control(ctdb, hdr);
+ break;
+
+ case CTDB_REQ_KEEPALIVE:
+ ctdb->statistics.keepalive_packets_recv++;
+ break;
+
+ default:
+ DEBUG(0,("%s: Packet with unknown operation %u\n",
+ __location__, hdr->operation));
+ break;
+ }
+
+done:
+ talloc_free(tmp_ctx);
+}
+
+
+/*
+ called by the transport layer when a node is dead
+*/
+void ctdb_node_dead(struct ctdb_node *node)
+{
+ if (node->flags & NODE_FLAGS_DISCONNECTED) {
+ DEBUG(1,("%s: node %s is already marked disconnected: %u connected\n",
+ node->ctdb->name, node->name,
+ node->ctdb->num_connected));
+ return;
+ }
+ node->ctdb->num_connected--;
+ node->flags |= NODE_FLAGS_DISCONNECTED;
+ node->rx_cnt = 0;
+ node->dead_count = 0;
+ DEBUG(1,("%s: node %s is dead: %u connected\n",
+ node->ctdb->name, node->name, node->ctdb->num_connected));
+ ctdb_daemon_cancel_controls(node->ctdb, node);
+}
+
+/*
+ called by the transport layer when a node is connected
+*/
+void ctdb_node_connected(struct ctdb_node *node)
+{
+ if (!(node->flags & NODE_FLAGS_DISCONNECTED)) {
+ DEBUG(1,("%s: node %s is already marked connected: %u connected\n",
+ node->ctdb->name, node->name,
+ node->ctdb->num_connected));
+ return;
+ }
+ node->ctdb->num_connected++;
+ node->dead_count = 0;
+ node->flags &= ~NODE_FLAGS_DISCONNECTED;
+ DEBUG(1,("%s: connected to %s - %u connected\n",
+ node->ctdb->name, node->name, node->ctdb->num_connected));
+}
+
+struct queue_next {
+ struct ctdb_context *ctdb;
+ struct ctdb_req_header *hdr;
+};
+
+
+/*
+ trigered when a deferred packet is due
+ */
+static void queue_next_trigger(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *private_data)
+{
+ struct queue_next *q = talloc_get_type(private_data, struct queue_next);
+ ctdb_input_pkt(q->ctdb, q->hdr);
+ talloc_free(q);
+}
+
+/*
+ defer a packet, so it is processed on the next event loop
+ this is used for sending packets to ourselves
+ */
+static void ctdb_defer_packet(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
+{
+ struct queue_next *q;
+ q = talloc(ctdb, struct queue_next);
+ if (q == NULL) {
+ DEBUG(0,(__location__ " Failed to allocate deferred packet\n"));
+ return;
+ }
+ q->ctdb = ctdb;
+ q->hdr = talloc_memdup(ctdb, hdr, hdr->length);
+ if (q->hdr == NULL) {
+ DEBUG(0,("Error copying deferred packet to self\n"));
+ return;
+ }
+#if 0
+ /* use this to put packets directly into our recv function */
+ ctdb_input_pkt(q->ctdb, q->hdr);
+#else
+ event_add_timed(ctdb->ev, q, timeval_zero(), queue_next_trigger, q);
+#endif
+}
+
+
+/*
+ broadcast a packet to all nodes
+*/
+static void ctdb_broadcast_packet_all(struct ctdb_context *ctdb,
+ struct ctdb_req_header *hdr)
+{
+ int i;
+ for (i=0;i<ctdb->num_nodes;i++) {
+ hdr->destnode = ctdb->nodes[i]->vnn;
+ ctdb_queue_packet(ctdb, hdr);
+ }
+}
+
+/*
+ broadcast a packet to all nodes in the current vnnmap
+*/
+static void ctdb_broadcast_packet_vnnmap(struct ctdb_context *ctdb,
+ struct ctdb_req_header *hdr)
+{
+ int i;
+ for (i=0;i<ctdb->vnn_map->size;i++) {
+ hdr->destnode = ctdb->vnn_map->map[i];
+ ctdb_queue_packet(ctdb, hdr);
+ }
+}
+
+/*
+ broadcast a packet to all connected nodes
+*/
+static void ctdb_broadcast_packet_connected(struct ctdb_context *ctdb,
+ struct ctdb_req_header *hdr)
+{
+ int i;
+ for (i=0;i<ctdb->num_nodes;i++) {
+ if (!(ctdb->nodes[i]->flags & NODE_FLAGS_DISCONNECTED)) {
+ hdr->destnode = ctdb->nodes[i]->vnn;
+ ctdb_queue_packet(ctdb, hdr);
+ }
+ }
+}
+
+/*
+ queue a packet or die
+*/
+void ctdb_queue_packet(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
+{
+ struct ctdb_node *node;
+
+ switch (hdr->destnode) {
+ case CTDB_BROADCAST_ALL:
+ ctdb_broadcast_packet_all(ctdb, hdr);
+ return;
+ case CTDB_BROADCAST_VNNMAP:
+ ctdb_broadcast_packet_vnnmap(ctdb, hdr);
+ return;
+ case CTDB_BROADCAST_CONNECTED:
+ ctdb_broadcast_packet_connected(ctdb, hdr);
+ return;
+ }
+
+ ctdb->statistics.node_packets_sent++;
+
+ if (!ctdb_validate_vnn(ctdb, hdr->destnode)) {
+ DEBUG(0,(__location__ " cant send to node %u that does not exist\n",
+ hdr->destnode));
+ return;
+ }
+
+ node = ctdb->nodes[hdr->destnode];
+
+ if (hdr->destnode == ctdb->vnn) {
+ ctdb_defer_packet(ctdb, hdr);
+ } else {
+ node->tx_cnt++;
+ if (ctdb->methods->queue_pkt(node, (uint8_t *)hdr, hdr->length) != 0) {
+ ctdb_fatal(ctdb, "Unable to queue packet\n");
+ }
+ }
+}
+
+
diff --git a/source4/cluster/ctdb/server/ctdb_takeover.c b/source4/cluster/ctdb/server/ctdb_takeover.c
new file mode 100644
index 0000000000..42a23808dd
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_takeover.c
@@ -0,0 +1,822 @@
+/*
+ ctdb recovery code
+
+ Copyright (C) Ronnie Sahlberg 2007
+ Copyright (C) Andrew Tridgell 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 "lib/events/events.h"
+#include "lib/tdb/include/tdb.h"
+#include "lib/util/dlinklist.h"
+#include "system/network.h"
+#include "system/filesys.h"
+#include "system/wait.h"
+#include "../include/ctdb_private.h"
+
+
+#define TAKEOVER_TIMEOUT() timeval_current_ofs(ctdb->tunable.takeover_timeout,0)
+
+#define CTDB_ARP_INTERVAL 1
+#define CTDB_ARP_REPEAT 3
+
+struct ctdb_takeover_arp {
+ struct ctdb_context *ctdb;
+ uint32_t count;
+ struct sockaddr_in sin;
+ struct ctdb_tcp_list *tcp_list;
+};
+
+/*
+ lists of tcp endpoints
+ */
+struct ctdb_tcp_list {
+ struct ctdb_tcp_list *prev, *next;
+ uint32_t vnn;
+ struct sockaddr_in saddr;
+ struct sockaddr_in daddr;
+};
+
+
+/*
+ list of clients to kill on IP release
+ */
+struct ctdb_client_ip {
+ struct ctdb_client_ip *prev, *next;
+ struct ctdb_context *ctdb;
+ struct sockaddr_in ip;
+ uint32_t client_id;
+};
+
+
+/*
+ send a gratuitous arp
+ */
+static void ctdb_control_send_arp(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *private_data)
+{
+ struct ctdb_takeover_arp *arp = talloc_get_type(private_data,
+ struct ctdb_takeover_arp);
+ int ret;
+ struct ctdb_tcp_list *tcp;
+
+ ret = ctdb_sys_send_arp(&arp->sin, arp->ctdb->takeover.interface);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " sending of arp failed (%s)\n", strerror(errno)));
+ }
+
+ for (tcp=arp->tcp_list;tcp;tcp=tcp->next) {
+ DEBUG(2,("sending tcp tickle ack for %u->%s:%u\n",
+ (unsigned)ntohs(tcp->daddr.sin_port),
+ inet_ntoa(tcp->saddr.sin_addr),
+ (unsigned)ntohs(tcp->saddr.sin_port)));
+ ret = ctdb_sys_send_tcp(&tcp->saddr, &tcp->daddr, 0, 0, 0);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " Failed to send tcp tickle ack for %s\n",
+ inet_ntoa(tcp->saddr.sin_addr)));
+ }
+ }
+
+ arp->count++;
+
+ if (arp->count == CTDB_ARP_REPEAT) {
+ talloc_free(arp);
+ return;
+ }
+
+ event_add_timed(arp->ctdb->ev, arp->ctdb->takeover.last_ctx,
+ timeval_current_ofs(CTDB_ARP_INTERVAL, 0),
+ ctdb_control_send_arp, arp);
+}
+
+struct takeover_callback_state {
+ struct ctdb_req_control *c;
+ struct sockaddr_in *sin;
+};
+
+/*
+ called when takeip event finishes
+ */
+static void takeover_ip_callback(struct ctdb_context *ctdb, int status,
+ void *private_data)
+{
+ struct takeover_callback_state *state =
+ talloc_get_type(private_data, struct takeover_callback_state);
+ struct ctdb_takeover_arp *arp;
+ char *ip = inet_ntoa(state->sin->sin_addr);
+ struct ctdb_tcp_list *tcp;
+
+ ctdb_start_monitoring(ctdb);
+
+ if (status != 0) {
+ DEBUG(0,(__location__ " Failed to takeover IP %s on interface %s\n",
+ ip, ctdb->takeover.interface));
+ ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
+ talloc_free(state);
+ return;
+ }
+
+ if (!ctdb->takeover.last_ctx) {
+ ctdb->takeover.last_ctx = talloc_new(ctdb);
+ if (!ctdb->takeover.last_ctx) goto failed;
+ }
+
+ arp = talloc_zero(ctdb->takeover.last_ctx, struct ctdb_takeover_arp);
+ if (!arp) goto failed;
+
+ arp->ctdb = ctdb;
+ arp->sin = *state->sin;
+
+ /* add all of the known tcp connections for this IP to the
+ list of tcp connections to send tickle acks for */
+ for (tcp=ctdb->tcp_list;tcp;tcp=tcp->next) {
+ if (state->sin->sin_addr.s_addr == tcp->daddr.sin_addr.s_addr) {
+ struct ctdb_tcp_list *t2 = talloc(arp, struct ctdb_tcp_list);
+ if (t2 == NULL) goto failed;
+ *t2 = *tcp;
+ DLIST_ADD(arp->tcp_list, t2);
+ }
+ }
+
+ event_add_timed(arp->ctdb->ev, arp->ctdb->takeover.last_ctx,
+ timeval_zero(), ctdb_control_send_arp, arp);
+
+ /* the control succeeded */
+ ctdb_request_control_reply(ctdb, state->c, NULL, 0, NULL);
+ talloc_free(state);
+ return;
+
+failed:
+ ctdb_request_control_reply(ctdb, state->c, NULL, -1, NULL);
+ talloc_free(state);
+ return;
+}
+
+/*
+ take over an ip address
+ */
+int32_t ctdb_control_takeover_ip(struct ctdb_context *ctdb,
+ struct ctdb_req_control *c,
+ TDB_DATA indata,
+ bool *async_reply)
+{
+ int ret;
+ struct takeover_callback_state *state;
+ struct ctdb_public_ip *pip = (struct ctdb_public_ip *)indata.dptr;
+ char *ip = inet_ntoa(pip->sin.sin_addr);
+
+
+ /* update out node table */
+ ctdb->nodes[pip->vnn]->takeover_vnn = pip->takeover_vnn;
+
+ /* if our kernel already has this IP, do nothing */
+ if (ctdb_sys_have_ip(ip)) {
+ return 0;
+ }
+
+ state = talloc(ctdb, struct takeover_callback_state);
+ CTDB_NO_MEMORY(ctdb, state);
+
+ state->c = talloc_steal(ctdb, c);
+ state->sin = talloc(ctdb, struct sockaddr_in);
+ CTDB_NO_MEMORY(ctdb, state->sin);
+ *state->sin = pip->sin;
+
+ DEBUG(0,("Takover of IP %s/%u on interface %s\n",
+ ip, ctdb->nodes[ctdb->vnn]->public_netmask_bits,
+ ctdb->takeover.interface));
+
+ ctdb_stop_monitoring(ctdb);
+
+ ret = ctdb_event_script_callback(ctdb,
+ timeval_current_ofs(ctdb->tunable.script_timeout, 0),
+ state, takeover_ip_callback, state,
+ "takeip %s %s %u",
+ ctdb->takeover.interface,
+ ip,
+ ctdb->nodes[ctdb->vnn]->public_netmask_bits);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " Failed to takeover IP %s on interface %s\n",
+ ip, ctdb->takeover.interface));
+ talloc_free(state);
+ return -1;
+ }
+
+ /* tell ctdb_control.c that we will be replying asynchronously */
+ *async_reply = true;
+
+ return 0;
+}
+
+/*
+ kill any clients that are registered with a IP that is being released
+ */
+static void release_kill_clients(struct ctdb_context *ctdb, struct in_addr in)
+{
+ struct ctdb_client_ip *ip;
+
+ for (ip=ctdb->client_ip_list; ip; ip=ip->next) {
+ if (ip->ip.sin_addr.s_addr == in.s_addr) {
+ struct ctdb_client *client = ctdb_reqid_find(ctdb,
+ ip->client_id,
+ struct ctdb_client);
+ if (client->pid != 0) {
+ DEBUG(0,(__location__ " Killing client pid %u for IP %s on client_id %u\n",
+ (unsigned)client->pid, inet_ntoa(in),
+ ip->client_id));
+ kill(client->pid, SIGKILL);
+ }
+ }
+ }
+}
+
+/*
+ called when releaseip event finishes
+ */
+static void release_ip_callback(struct ctdb_context *ctdb, int status,
+ void *private_data)
+{
+ struct takeover_callback_state *state =
+ talloc_get_type(private_data, struct takeover_callback_state);
+ char *ip = inet_ntoa(state->sin->sin_addr);
+ TDB_DATA data;
+ struct ctdb_tcp_list *tcp;
+
+ ctdb_start_monitoring(ctdb);
+
+ /* send a message to all clients of this node telling them
+ that the cluster has been reconfigured and they should
+ release any sockets on this IP */
+ data.dptr = (uint8_t *)ip;
+ data.dsize = strlen(ip)+1;
+
+ ctdb_daemon_send_message(ctdb, ctdb->vnn, CTDB_SRVID_RELEASE_IP, data);
+
+ /* kill clients that have registered with this IP */
+ release_kill_clients(ctdb, state->sin->sin_addr);
+
+
+ /* tell other nodes about any tcp connections we were holding with this IP */
+ for (tcp=ctdb->tcp_list;tcp;tcp=tcp->next) {
+ if (tcp->vnn == ctdb->vnn &&
+ state->sin->sin_addr.s_addr == tcp->daddr.sin_addr.s_addr) {
+ struct ctdb_control_tcp_vnn t;
+
+ t.vnn = ctdb->vnn;
+ t.src = tcp->saddr;
+ t.dest = tcp->daddr;
+
+ data.dptr = (uint8_t *)&t;
+ data.dsize = sizeof(t);
+
+ ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_CONNECTED, 0,
+ CTDB_CONTROL_TCP_ADD,
+ 0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
+ }
+ }
+
+ /* the control succeeded */
+ ctdb_request_control_reply(ctdb, state->c, NULL, 0, NULL);
+ talloc_free(state);
+}
+
+
+/*
+ release an ip address
+ */
+int32_t ctdb_control_release_ip(struct ctdb_context *ctdb,
+ struct ctdb_req_control *c,
+ TDB_DATA indata,
+ bool *async_reply)
+{
+ int ret;
+ struct takeover_callback_state *state;
+ struct ctdb_public_ip *pip = (struct ctdb_public_ip *)indata.dptr;
+ char *ip = inet_ntoa(pip->sin.sin_addr);
+
+ /* update out node table */
+ ctdb->nodes[pip->vnn]->takeover_vnn = pip->takeover_vnn;
+
+ if (!ctdb_sys_have_ip(ip)) {
+ return 0;
+ }
+
+ DEBUG(0,("Release of IP %s/%u on interface %s\n",
+ ip, ctdb->nodes[ctdb->vnn]->public_netmask_bits,
+ ctdb->takeover.interface));
+
+ /* stop any previous arps */
+ talloc_free(ctdb->takeover.last_ctx);
+ ctdb->takeover.last_ctx = NULL;
+
+ state = talloc(ctdb, struct takeover_callback_state);
+ CTDB_NO_MEMORY(ctdb, state);
+
+ state->c = talloc_steal(state, c);
+ state->sin = talloc(state, struct sockaddr_in);
+ CTDB_NO_MEMORY(ctdb, state->sin);
+ *state->sin = pip->sin;
+
+ ctdb_stop_monitoring(ctdb);
+
+ ret = ctdb_event_script_callback(ctdb,
+ timeval_current_ofs(ctdb->tunable.script_timeout, 0),
+ state, release_ip_callback, state,
+ "releaseip %s %s %u",
+ ctdb->takeover.interface,
+ ip,
+ ctdb->nodes[ctdb->vnn]->public_netmask_bits);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " Failed to release IP %s on interface %s\n",
+ ip, ctdb->takeover.interface));
+ talloc_free(state);
+ return -1;
+ }
+
+ /* tell the control that we will be reply asynchronously */
+ *async_reply = true;
+
+ return 0;
+}
+
+
+/*
+ setup the event script
+*/
+int ctdb_set_event_script(struct ctdb_context *ctdb, const char *script)
+{
+ ctdb->takeover.event_script = talloc_strdup(ctdb, script);
+ CTDB_NO_MEMORY(ctdb, ctdb->takeover.event_script);
+ return 0;
+}
+
+/*
+ setup the public address list from a file
+*/
+int ctdb_set_public_addresses(struct ctdb_context *ctdb, const char *alist)
+{
+ char **lines;
+ int nlines;
+ int i;
+
+ lines = file_lines_load(alist, &nlines, ctdb);
+ if (lines == NULL) {
+ ctdb_set_error(ctdb, "Failed to load public address list '%s'\n", alist);
+ return -1;
+ }
+ while (nlines > 0 && strcmp(lines[nlines-1], "") == 0) {
+ nlines--;
+ }
+
+ if (nlines != ctdb->num_nodes) {
+ DEBUG(0,("Number of lines in %s does not match number of nodes!\n", alist));
+ talloc_free(lines);
+ return -1;
+ }
+
+ for (i=0;i<nlines;i++) {
+ char *p;
+ struct in_addr in;
+
+ ctdb->nodes[i]->public_address = talloc_strdup(ctdb->nodes[i], lines[i]);
+ CTDB_NO_MEMORY(ctdb, ctdb->nodes[i]->public_address);
+ ctdb->nodes[i]->takeover_vnn = -1;
+
+ /* see if they supplied a netmask length */
+ p = strchr(ctdb->nodes[i]->public_address, '/');
+ if (!p) {
+ DEBUG(0,("You must supply a netmask for public address %s\n",
+ ctdb->nodes[i]->public_address));
+ return -1;
+ }
+ *p = 0;
+ ctdb->nodes[i]->public_netmask_bits = atoi(p+1);
+
+ if (ctdb->nodes[i]->public_netmask_bits > 32) {
+ DEBUG(0, ("Illegal netmask for IP %s\n", ctdb->nodes[i]->public_address));
+ return -1;
+ }
+
+ if (inet_aton(ctdb->nodes[i]->public_address, &in) == 0) {
+ DEBUG(0,("Badly formed IP '%s' in public address list\n", ctdb->nodes[i]->public_address));
+ return -1;
+ }
+ }
+
+ talloc_free(lines);
+ return 0;
+}
+
+/*
+ see if two IPs are on the same subnet
+ */
+static bool ctdb_same_subnet(const char *ip1, const char *ip2, uint8_t netmask_bits)
+{
+ struct in_addr in1, in2;
+ uint32_t mask;
+
+ inet_aton(ip1, &in1);
+ inet_aton(ip2, &in2);
+
+ mask = ~((1LL<<(32-netmask_bits))-1);
+
+ if ((ntohl(in1.s_addr) & mask) != (ntohl(in2.s_addr) & mask)) {
+ return false;
+ }
+
+ return true;
+}
+
+
+/*
+ try to find an available node to take a given nodes IP that meets the
+ criterion given by the flags
+ */
+static void ctdb_takeover_find_node(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap,
+ int start_node, uint32_t mask_flags)
+{
+ int j;
+ for (j=(start_node+1)%nodemap->num;
+ j != start_node;
+ j=(j+1)%nodemap->num) {
+ if (!(nodemap->nodes[j].flags & mask_flags) &&
+ ctdb_same_subnet(ctdb->nodes[j]->public_address,
+ ctdb->nodes[start_node]->public_address,
+ ctdb->nodes[j]->public_netmask_bits)) {
+ ctdb->nodes[start_node]->takeover_vnn = nodemap->nodes[j].vnn;
+ break;
+ }
+ }
+}
+
+
+/*
+ make any IP alias changes for public addresses that are necessary
+ */
+int ctdb_takeover_run(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap)
+{
+ int i, j;
+ int ret;
+ struct ctdb_public_ip ip;
+
+ ZERO_STRUCT(ip);
+
+ /* Work out which node will look after each public IP.
+ * takeover_node cycles over the nodes and is incremented each time a
+ * node has been assigned to take over for another node.
+ * This spreads the failed nodes out across the remaining
+ * nodes more evenly
+ */
+ for (i=0;i<nodemap->num;i++) {
+ if (!(nodemap->nodes[i].flags & (NODE_FLAGS_INACTIVE|NODE_FLAGS_DISABLED))) {
+ ctdb->nodes[i]->takeover_vnn = nodemap->nodes[i].vnn;
+ } else {
+ ctdb->nodes[i]->takeover_vnn = (uint32_t)-1;
+
+ ctdb_takeover_find_node(ctdb, nodemap, i, NODE_FLAGS_INACTIVE|NODE_FLAGS_DISABLED);
+
+ /* if no enabled node can take it, then we
+ might as well use any active node. It
+ probably means that some subsystem (such as
+ NFS) is sick on all nodes. Best we can do
+ is to keep the other services up. */
+ if (ctdb->nodes[i]->takeover_vnn == (uint32_t)-1) {
+ ctdb_takeover_find_node(ctdb, nodemap, i, NODE_FLAGS_INACTIVE);
+ }
+
+ if (ctdb->nodes[i]->takeover_vnn == (uint32_t)-1) {
+ DEBUG(0,(__location__ " No node available on same network to take %s\n",
+ ctdb->nodes[i]->public_address));
+ }
+ }
+ }
+
+ /* at this point ctdb->nodes[i]->takeover_vnn is the vnn which will own each IP */
+
+ /* now tell all nodes to delete any alias that they should not
+ have. This will be a NOOP on nodes that don't currently
+ hold the given alias */
+ for (i=0;i<nodemap->num;i++) {
+ /* don't talk to unconnected nodes, but do talk to banned nodes */
+ if (nodemap->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
+ continue;
+ }
+
+ /* tell this node to delete all of the aliases that it should not have */
+ for (j=0;j<nodemap->num;j++) {
+ if (ctdb->nodes[j]->takeover_vnn != nodemap->nodes[i].vnn) {
+ ip.vnn = j;
+ ip.takeover_vnn = ctdb->nodes[j]->takeover_vnn;
+ ip.sin.sin_family = AF_INET;
+ inet_aton(ctdb->nodes[j]->public_address, &ip.sin.sin_addr);
+
+ ret = ctdb_ctrl_release_ip(ctdb, TAKEOVER_TIMEOUT(),
+ nodemap->nodes[i].vnn,
+ &ip);
+ if (ret != 0) {
+ DEBUG(0,("Failed to tell vnn %u to release IP %s\n",
+ nodemap->nodes[i].vnn,
+ ctdb->nodes[j]->public_address));
+ return -1;
+ }
+ }
+ }
+ }
+
+ /* tell all nodes to get their own IPs */
+ for (i=0;i<nodemap->num;i++) {
+ if (ctdb->nodes[i]->takeover_vnn == -1) {
+ /* this IP won't be taken over */
+ continue;
+ }
+ ip.vnn = i;
+ ip.takeover_vnn = ctdb->nodes[i]->takeover_vnn;
+ ip.sin.sin_family = AF_INET;
+ inet_aton(ctdb->nodes[i]->public_address, &ip.sin.sin_addr);
+
+ ret = ctdb_ctrl_takeover_ip(ctdb, TAKEOVER_TIMEOUT(),
+ ctdb->nodes[i]->takeover_vnn,
+ &ip);
+ if (ret != 0) {
+ DEBUG(0,("Failed asking vnn %u to take over IP %s\n",
+ ctdb->nodes[i]->takeover_vnn,
+ ctdb->nodes[i]->public_address));
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ destroy a ctdb_client_ip structure
+ */
+static int ctdb_client_ip_destructor(struct ctdb_client_ip *ip)
+{
+ DLIST_REMOVE(ip->ctdb->client_ip_list, ip);
+ return 0;
+}
+
+/*
+ called by a client to inform us of a TCP connection that it is managing
+ that should tickled with an ACK when IP takeover is done
+ */
+int32_t ctdb_control_tcp_client(struct ctdb_context *ctdb, uint32_t client_id, uint32_t vnn,
+ TDB_DATA indata)
+{
+ struct ctdb_client *client = ctdb_reqid_find(ctdb, client_id, struct ctdb_client);
+ struct ctdb_control_tcp *p = (struct ctdb_control_tcp *)indata.dptr;
+ struct ctdb_tcp_list *tcp;
+ struct ctdb_control_tcp_vnn t;
+ int ret;
+ TDB_DATA data;
+ struct ctdb_client_ip *ip;
+
+ ip = talloc(client, struct ctdb_client_ip);
+ CTDB_NO_MEMORY(ctdb, ip);
+
+ ip->ctdb = ctdb;
+ ip->ip = p->dest;
+ ip->client_id = client_id;
+ talloc_set_destructor(ip, ctdb_client_ip_destructor);
+ DLIST_ADD(ctdb->client_ip_list, ip);
+
+ tcp = talloc(client, struct ctdb_tcp_list);
+ CTDB_NO_MEMORY(ctdb, tcp);
+
+ tcp->vnn = vnn;
+ tcp->saddr = p->src;
+ tcp->daddr = p->dest;
+
+ DLIST_ADD(client->tcp_list, tcp);
+
+ t.vnn = vnn;
+ t.src = p->src;
+ t.dest = p->dest;
+
+ data.dptr = (uint8_t *)&t;
+ data.dsize = sizeof(t);
+
+ /* tell all nodes about this tcp connection */
+ ret = ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_CONNECTED, 0,
+ CTDB_CONTROL_TCP_ADD,
+ 0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
+ if (ret != 0) {
+ DEBUG(0,(__location__ " Failed to send CTDB_CONTROL_TCP_ADD\n"));
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ see if two sockaddr_in are the same
+ */
+static bool same_sockaddr_in(struct sockaddr_in *in1, struct sockaddr_in *in2)
+{
+ return in1->sin_family == in2->sin_family &&
+ in1->sin_port == in2->sin_port &&
+ in1->sin_addr.s_addr == in2->sin_addr.s_addr;
+}
+
+/*
+ find a tcp address on a list
+ */
+static struct ctdb_tcp_list *ctdb_tcp_find(struct ctdb_tcp_list *list,
+ struct ctdb_tcp_list *tcp)
+{
+ while (list) {
+ if (same_sockaddr_in(&list->saddr, &tcp->saddr) &&
+ same_sockaddr_in(&list->daddr, &tcp->daddr)) {
+ return list;
+ }
+ list = list->next;
+ }
+ return NULL;
+}
+
+/*
+ called by a daemon to inform us of a TCP connection that one of its
+ clients managing that should tickled with an ACK when IP takeover is
+ done
+ */
+int32_t ctdb_control_tcp_add(struct ctdb_context *ctdb, TDB_DATA indata)
+{
+ struct ctdb_control_tcp_vnn *p = (struct ctdb_control_tcp_vnn *)indata.dptr;
+ struct ctdb_tcp_list *tcp;
+
+ tcp = talloc(ctdb, struct ctdb_tcp_list);
+ CTDB_NO_MEMORY(ctdb, tcp);
+
+ tcp->vnn = p->vnn;
+ tcp->saddr = p->src;
+ tcp->daddr = p->dest;
+
+ if (NULL == ctdb_tcp_find(ctdb->tcp_list, tcp)) {
+ DLIST_ADD(ctdb->tcp_list, tcp);
+ DEBUG(2,("Added tickle info for %s:%u from vnn %u\n",
+ inet_ntoa(tcp->daddr.sin_addr), ntohs(tcp->daddr.sin_port),
+ tcp->vnn));
+ } else {
+ DEBUG(4,("Already had tickle info for %s:%u from vnn %u\n",
+ inet_ntoa(tcp->daddr.sin_addr), ntohs(tcp->daddr.sin_port),
+ tcp->vnn));
+ }
+
+ return 0;
+}
+
+/*
+ called by a daemon to inform us of a TCP connection that one of its
+ clients managing that should tickled with an ACK when IP takeover is
+ done
+ */
+int32_t ctdb_control_tcp_remove(struct ctdb_context *ctdb, TDB_DATA indata)
+{
+ struct ctdb_control_tcp_vnn *p = (struct ctdb_control_tcp_vnn *)indata.dptr;
+ struct ctdb_tcp_list t, *tcp;
+
+ t.vnn = p->vnn;
+ t.saddr = p->src;
+ t.daddr = p->dest;
+
+ tcp = ctdb_tcp_find(ctdb->tcp_list, &t);
+ if (tcp) {
+ DEBUG(2,("Removed tickle info for %s:%u from vnn %u\n",
+ inet_ntoa(tcp->daddr.sin_addr), ntohs(tcp->daddr.sin_port),
+ tcp->vnn));
+ DLIST_REMOVE(ctdb->tcp_list, tcp);
+ talloc_free(tcp);
+ }
+
+ return 0;
+}
+
+
+/*
+ called when a daemon restarts - wipes all tcp entries from that vnn
+ */
+int32_t ctdb_control_startup(struct ctdb_context *ctdb, uint32_t vnn)
+{
+ struct ctdb_tcp_list *tcp, *next;
+ for (tcp=ctdb->tcp_list;tcp;tcp=next) {
+ next = tcp->next;
+ if (tcp->vnn == vnn) {
+ DLIST_REMOVE(ctdb->tcp_list, tcp);
+ talloc_free(tcp);
+ }
+
+ /* and tell the new guy about any that he should have
+ from us */
+ if (tcp->vnn == ctdb->vnn) {
+ struct ctdb_control_tcp_vnn t;
+ TDB_DATA data;
+
+ t.vnn = tcp->vnn;
+ t.src = tcp->saddr;
+ t.dest = tcp->daddr;
+
+ data.dptr = (uint8_t *)&t;
+ data.dsize = sizeof(t);
+
+ ctdb_daemon_send_control(ctdb, vnn, 0,
+ CTDB_CONTROL_TCP_ADD,
+ 0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
+ }
+ }
+ return 0;
+}
+
+
+/*
+ called when a client structure goes away - hook to remove
+ elements from the tcp_list in all daemons
+ */
+void ctdb_takeover_client_destructor_hook(struct ctdb_client *client)
+{
+ while (client->tcp_list) {
+ TDB_DATA data;
+ struct ctdb_control_tcp_vnn p;
+ struct ctdb_tcp_list *tcp = client->tcp_list;
+ DLIST_REMOVE(client->tcp_list, tcp);
+ p.vnn = tcp->vnn;
+ p.src = tcp->saddr;
+ p.dest = tcp->daddr;
+ data.dptr = (uint8_t *)&p;
+ data.dsize = sizeof(p);
+ ctdb_daemon_send_control(client->ctdb, CTDB_BROADCAST_CONNECTED, 0,
+ CTDB_CONTROL_TCP_REMOVE,
+ 0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
+ talloc_free(tcp);
+ }
+}
+
+
+/*
+ release all IPs on shutdown
+ */
+void ctdb_release_all_ips(struct ctdb_context *ctdb)
+{
+ int i;
+
+ if (!ctdb->takeover.enabled) {
+ return;
+ }
+
+ for (i=0;i<ctdb->num_nodes;i++) {
+ struct ctdb_node *node = ctdb->nodes[i];
+ if (ctdb_sys_have_ip(node->public_address)) {
+ struct in_addr in;
+ ctdb_event_script(ctdb, "releaseip %s %s %u",
+ ctdb->takeover.interface,
+ node->public_address,
+ node->public_netmask_bits);
+ if (inet_aton(node->public_address, &in) != 0) {
+ release_kill_clients(ctdb, in);
+ }
+ }
+ }
+}
+
+
+/*
+ get list of public IPs
+ */
+int32_t ctdb_control_get_public_ips(struct ctdb_context *ctdb, struct ctdb_req_control *c, TDB_DATA *outdata)
+{
+ int i, len;
+ struct ctdb_all_public_ips *ips;
+
+ len = offsetof(struct ctdb_all_public_ips, ips) + ctdb->num_nodes*sizeof(struct ctdb_public_ip);
+
+ ips = talloc_zero_size(outdata, len);
+ CTDB_NO_MEMORY(ctdb, ips);
+
+ outdata->dsize = len;
+ outdata->dptr = (uint8_t *)ips;
+
+ ips->num = ctdb->num_nodes;
+ for(i=0;i<ctdb->num_nodes;i++){
+ ips->ips[i].vnn = i;
+ ips->ips[i].takeover_vnn = ctdb->nodes[i]->takeover_vnn;
+ ips->ips[i].sin.sin_family = AF_INET;
+ if (ctdb->nodes[i]->public_address) {
+ inet_aton(ctdb->nodes[i]->public_address, &ips->ips[i].sin.sin_addr);
+ }
+ }
+
+ return 0;
+}
diff --git a/source4/cluster/ctdb/server/ctdb_traverse.c b/source4/cluster/ctdb/server/ctdb_traverse.c
new file mode 100644
index 0000000000..d44c27401a
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_traverse.c
@@ -0,0 +1,463 @@
+/*
+ efficient async ctdb traverse
+
+ Copyright (C) Andrew Tridgell 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 "lib/events/events.h"
+#include "system/filesys.h"
+#include "system/wait.h"
+#include "db_wrap.h"
+#include "lib/tdb/include/tdb.h"
+#include "../include/ctdb_private.h"
+
+typedef void (*ctdb_traverse_fn_t)(void *private_data, TDB_DATA key, TDB_DATA data);
+
+/*
+ handle returned to caller - freeing this handler will kill the child and
+ terminate the traverse
+ */
+struct ctdb_traverse_local_handle {
+ struct ctdb_db_context *ctdb_db;
+ int fd[2];
+ pid_t child;
+ void *private_data;
+ ctdb_traverse_fn_t callback;
+ struct timeval start_time;
+ struct ctdb_queue *queue;
+};
+
+/*
+ called when data is available from the child
+ */
+static void ctdb_traverse_local_handler(uint8_t *rawdata, size_t length, void *private_data)
+{
+ struct ctdb_traverse_local_handle *h = talloc_get_type(private_data,
+ struct ctdb_traverse_local_handle);
+ TDB_DATA key, data;
+ ctdb_traverse_fn_t callback = h->callback;
+ void *p = h->private_data;
+ struct ctdb_rec_data *tdata = (struct ctdb_rec_data *)rawdata;
+
+ if (rawdata == NULL || length < 4 || length != tdata->length) {
+ /* end of traverse */
+ talloc_free(h);
+ callback(p, tdb_null, tdb_null);
+ return;
+ }
+
+ key.dsize = tdata->keylen;
+ key.dptr = &tdata->data[0];
+ data.dsize = tdata->datalen;
+ data.dptr = &tdata->data[tdata->keylen];
+
+ callback(p, key, data);
+}
+
+/*
+ destroy a in-flight traverse operation
+ */
+static int traverse_local_destructor(struct ctdb_traverse_local_handle *h)
+{
+ kill(h->child, SIGKILL);
+ waitpid(h->child, NULL, 0);
+ return 0;
+}
+
+/*
+ callback from tdb_traverse_read()
+ */
+static int ctdb_traverse_local_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
+{
+ struct ctdb_traverse_local_handle *h = talloc_get_type(p,
+ struct ctdb_traverse_local_handle);
+ struct ctdb_rec_data *d;
+ struct ctdb_ltdb_header *hdr;
+
+ /* filter out non-authoritative and zero-length records */
+ hdr = (struct ctdb_ltdb_header *)data.dptr;
+ if (data.dsize <= sizeof(struct ctdb_ltdb_header) ||
+ hdr->dmaster != h->ctdb_db->ctdb->vnn) {
+ return 0;
+ }
+
+ d = ctdb_marshall_record(h, 0, key, data);
+ if (d == NULL) {
+ /* error handling is tricky in this child code .... */
+ return -1;
+ }
+
+ if (write(h->fd[1], (uint8_t *)d, d->length) != d->length) {
+ return -1;
+ }
+ return 0;
+}
+
+
+/*
+ setup a non-blocking traverse of a local ltdb. The callback function
+ will be called on every record in the local ltdb. To stop the
+ travserse, talloc_free() the travserse_handle.
+
+ The traverse is finished when the callback is called with tdb_null for key and data
+ */
+static struct ctdb_traverse_local_handle *ctdb_traverse_local(struct ctdb_db_context *ctdb_db,
+ ctdb_traverse_fn_t callback,
+ void *private_data)
+{
+ struct ctdb_traverse_local_handle *h;
+ int ret;
+
+ h = talloc_zero(ctdb_db, struct ctdb_traverse_local_handle);
+ if (h == NULL) {
+ return NULL;
+ }
+
+ ret = pipe(h->fd);
+
+ if (ret != 0) {
+ talloc_free(h);
+ return NULL;
+ }
+
+ h->child = fork();
+
+ if (h->child == (pid_t)-1) {
+ close(h->fd[0]);
+ close(h->fd[1]);
+ talloc_free(h);
+ return NULL;
+ }
+
+ h->callback = callback;
+ h->private_data = private_data;
+ h->ctdb_db = ctdb_db;
+
+ if (h->child == 0) {
+ /* start the traverse in the child */
+ close(h->fd[0]);
+ tdb_traverse_read(ctdb_db->ltdb->tdb, ctdb_traverse_local_fn, h);
+ _exit(0);
+ }
+
+ close(h->fd[1]);
+ talloc_set_destructor(h, traverse_local_destructor);
+
+ /*
+ setup a packet queue between the child and the parent. This
+ copes with all the async and packet boundary issues
+ */
+ h->queue = ctdb_queue_setup(ctdb_db->ctdb, h, h->fd[0], 0, ctdb_traverse_local_handler, h);
+ if (h->queue == NULL) {
+ talloc_free(h);
+ return NULL;
+ }
+
+ h->start_time = timeval_current();
+
+ return h;
+}
+
+
+struct ctdb_traverse_all_handle {
+ struct ctdb_context *ctdb;
+ uint32_t reqid;
+ ctdb_traverse_fn_t callback;
+ void *private_data;
+ uint32_t null_count;
+};
+
+/*
+ destroy a traverse_all op
+ */
+static int ctdb_traverse_all_destructor(struct ctdb_traverse_all_handle *state)
+{
+ ctdb_reqid_remove(state->ctdb, state->reqid);
+ return 0;
+}
+
+struct ctdb_traverse_all {
+ uint32_t db_id;
+ uint32_t reqid;
+ uint32_t vnn;
+};
+
+/* called when a traverse times out */
+static void ctdb_traverse_all_timeout(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *private_data)
+{
+ struct ctdb_traverse_all_handle *state = talloc_get_type(private_data, struct ctdb_traverse_all_handle);
+
+ state->ctdb->statistics.timeouts.traverse++;
+
+ state->callback(state->private_data, tdb_null, tdb_null);
+ talloc_free(state);
+}
+
+/*
+ setup a cluster-wide non-blocking traverse of a ctdb. The
+ callback function will be called on every record in the local
+ ltdb. To stop the travserse, talloc_free() the traverse_handle.
+
+ The traverse is finished when the callback is called with tdb_null
+ for key and data
+ */
+static struct ctdb_traverse_all_handle *ctdb_daemon_traverse_all(struct ctdb_db_context *ctdb_db,
+ ctdb_traverse_fn_t callback,
+ void *private_data)
+{
+ struct ctdb_traverse_all_handle *state;
+ struct ctdb_context *ctdb = ctdb_db->ctdb;
+ int ret;
+ TDB_DATA data;
+ struct ctdb_traverse_all r;
+
+ state = talloc(ctdb_db, struct ctdb_traverse_all_handle);
+ if (state == NULL) {
+ return NULL;
+ }
+
+ state->ctdb = ctdb;
+ state->reqid = ctdb_reqid_new(ctdb_db->ctdb, state);
+ state->callback = callback;
+ state->private_data = private_data;
+ state->null_count = 0;
+
+ talloc_set_destructor(state, ctdb_traverse_all_destructor);
+
+ r.db_id = ctdb_db->db_id;
+ r.reqid = state->reqid;
+ r.vnn = ctdb->vnn;
+
+ data.dptr = (uint8_t *)&r;
+ data.dsize = sizeof(r);
+
+ /* tell all the nodes in the cluster to start sending records to this node */
+ ret = ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_VNNMAP, 0,
+ CTDB_CONTROL_TRAVERSE_ALL,
+ 0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
+ if (ret != 0) {
+ talloc_free(state);
+ return NULL;
+ }
+
+ /* timeout the traverse */
+ event_add_timed(ctdb->ev, state,
+ timeval_current_ofs(ctdb->tunable.traverse_timeout, 0),
+ ctdb_traverse_all_timeout, state);
+
+ return state;
+}
+
+struct traverse_all_state {
+ struct ctdb_context *ctdb;
+ struct ctdb_traverse_local_handle *h;
+ uint32_t reqid;
+ uint32_t srcnode;
+};
+
+/*
+ called for each record during a traverse all
+ */
+static void traverse_all_callback(void *p, TDB_DATA key, TDB_DATA data)
+{
+ struct traverse_all_state *state = talloc_get_type(p, struct traverse_all_state);
+ int ret;
+ struct ctdb_rec_data *d;
+ TDB_DATA cdata;
+
+ d = ctdb_marshall_record(state, state->reqid, key, data);
+ if (d == NULL) {
+ /* darn .... */
+ DEBUG(0,("Out of memory in traverse_all_callback\n"));
+ return;
+ }
+
+ cdata.dptr = (uint8_t *)d;
+ cdata.dsize = d->length;
+
+ ret = ctdb_daemon_send_control(state->ctdb, state->srcnode, 0, CTDB_CONTROL_TRAVERSE_DATA,
+ 0, CTDB_CTRL_FLAG_NOREPLY, cdata, NULL, NULL);
+ if (ret != 0) {
+ DEBUG(0,("Failed to send traverse data\n"));
+ }
+
+ if (key.dsize == 0 && data.dsize == 0) {
+ /* we're done */
+ talloc_free(state);
+ }
+}
+
+/*
+ called when a CTDB_CONTROL_TRAVERSE_ALL control comes in. We then
+ setup a traverse of our local ltdb, sending the records as
+ CTDB_CONTROL_TRAVERSE_DATA records back to the originator
+ */
+int32_t ctdb_control_traverse_all(struct ctdb_context *ctdb, TDB_DATA data, TDB_DATA *outdata)
+{
+ struct ctdb_traverse_all *c = (struct ctdb_traverse_all *)data.dptr;
+ struct traverse_all_state *state;
+ struct ctdb_db_context *ctdb_db;
+
+ if (data.dsize != sizeof(struct ctdb_traverse_all)) {
+ DEBUG(0,("Invalid size in ctdb_control_traverse_all\n"));
+ return -1;
+ }
+
+ ctdb_db = find_ctdb_db(ctdb, c->db_id);
+ if (ctdb_db == NULL) {
+ return -1;
+ }
+
+ state = talloc(ctdb_db, struct traverse_all_state);
+ if (state == NULL) {
+ return -1;
+ }
+
+ state->reqid = c->reqid;
+ state->srcnode = c->vnn;
+ state->ctdb = ctdb;
+
+ state->h = ctdb_traverse_local(ctdb_db, traverse_all_callback, state);
+ if (state->h == NULL) {
+ talloc_free(state);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+/*
+ called when a CTDB_CONTROL_TRAVERSE_DATA control comes in. We then
+ call the traverse_all callback with the record
+ */
+int32_t ctdb_control_traverse_data(struct ctdb_context *ctdb, TDB_DATA data, TDB_DATA *outdata)
+{
+ struct ctdb_rec_data *d = (struct ctdb_rec_data *)data.dptr;
+ struct ctdb_traverse_all_handle *state;
+ TDB_DATA key;
+ ctdb_traverse_fn_t callback;
+ void *private_data;
+
+ if (data.dsize < sizeof(uint32_t) || data.dsize != d->length) {
+ DEBUG(0,("Bad record size in ctdb_control_traverse_data\n"));
+ return -1;
+ }
+
+ state = ctdb_reqid_find(ctdb, d->reqid, struct ctdb_traverse_all_handle);
+ if (state == NULL || d->reqid != state->reqid) {
+ /* traverse might have been terminated already */
+ return -1;
+ }
+
+ key.dsize = d->keylen;
+ key.dptr = &d->data[0];
+ data.dsize = d->datalen;
+ data.dptr = &d->data[d->keylen];
+
+ if (key.dsize == 0 && data.dsize == 0) {
+ state->null_count++;
+ if (state->null_count != ctdb_get_num_active_nodes(ctdb)) {
+ return 0;
+ }
+ }
+
+ callback = state->callback;
+ private_data = state->private_data;
+
+ callback(private_data, key, data);
+ if (key.dsize == 0 && data.dsize == 0) {
+ /* we've received all of the null replies, so all
+ nodes are finished */
+ talloc_free(state);
+ }
+ return 0;
+}
+
+struct traverse_start_state {
+ struct ctdb_context *ctdb;
+ struct ctdb_traverse_all_handle *h;
+ uint32_t srcnode;
+ uint32_t reqid;
+ uint64_t srvid;
+};
+
+/*
+ callback which sends records as messages to the client
+ */
+static void traverse_start_callback(void *p, TDB_DATA key, TDB_DATA data)
+{
+ struct traverse_start_state *state;
+ struct ctdb_rec_data *d;
+ TDB_DATA cdata;
+
+ state = talloc_get_type(p, struct traverse_start_state);
+
+ d = ctdb_marshall_record(state, state->reqid, key, data);
+ if (d == NULL) {
+ return;
+ }
+
+ cdata.dptr = (uint8_t *)d;
+ cdata.dsize = d->length;
+
+ ctdb_dispatch_message(state->ctdb, state->srvid, cdata);
+ if (key.dsize == 0 && data.dsize == 0) {
+ /* end of traverse */
+ talloc_free(state);
+ }
+}
+
+/*
+ start a traverse_all - called as a control from a client
+ */
+int32_t ctdb_control_traverse_start(struct ctdb_context *ctdb, TDB_DATA data,
+ TDB_DATA *outdata, uint32_t srcnode)
+{
+ struct ctdb_traverse_start *d = (struct ctdb_traverse_start *)data.dptr;
+ struct traverse_start_state *state;
+ struct ctdb_db_context *ctdb_db;
+
+ if (data.dsize != sizeof(*d)) {
+ DEBUG(0,("Bad record size in ctdb_control_traverse_start\n"));
+ return -1;
+ }
+
+ ctdb_db = find_ctdb_db(ctdb, d->db_id);
+ if (ctdb_db == NULL) {
+ return -1;
+ }
+
+ state = talloc(ctdb_db, struct traverse_start_state);
+ if (state == NULL) {
+ return -1;
+ }
+
+ state->srcnode = srcnode;
+ state->reqid = d->reqid;
+ state->srvid = d->srvid;
+ state->ctdb = ctdb;
+
+ state->h = ctdb_daemon_traverse_all(ctdb_db, traverse_start_callback, state);
+ if (state->h == NULL) {
+ talloc_free(state);
+ return -1;
+ }
+
+ return 0;
+}
diff --git a/source4/cluster/ctdb/server/ctdb_tunables.c b/source4/cluster/ctdb/server/ctdb_tunables.c
new file mode 100644
index 0000000000..491c965656
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdb_tunables.c
@@ -0,0 +1,163 @@
+/*
+ ctdb tunables code
+
+ Copyright (C) Andrew Tridgell 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 "../include/ctdb_private.h"
+
+static const struct {
+ const char *name;
+ uint32_t default_v;
+ size_t offset;
+} tunable_map[] = {
+ { "MaxRedirectCount", 3, offsetof(struct ctdb_tunable, max_redirect_count) },
+ { "SeqnumFrequency", 1, offsetof(struct ctdb_tunable, seqnum_frequency) },
+ { "ControlTimeout", 60, offsetof(struct ctdb_tunable, control_timeout) },
+ { "TraverseTimeout", 20, offsetof(struct ctdb_tunable, traverse_timeout) },
+ { "KeepaliveInterval", 2, offsetof(struct ctdb_tunable, keepalive_interval) },
+ { "KeepaliveLimit", 5, offsetof(struct ctdb_tunable, keepalive_limit) },
+ { "MaxLACount", 7, offsetof(struct ctdb_tunable, max_lacount) },
+ { "RecoverTimeout", 5, offsetof(struct ctdb_tunable, recover_timeout) },
+ { "RecoverInterval", 1, offsetof(struct ctdb_tunable, recover_interval) },
+ { "ElectionTimeout", 3, offsetof(struct ctdb_tunable, election_timeout) },
+ { "TakeoverTimeout", 5, offsetof(struct ctdb_tunable, takeover_timeout) },
+ { "MonitorInterval", 15, offsetof(struct ctdb_tunable, monitor_interval) },
+ { "EventScriptTimeout", 20, offsetof(struct ctdb_tunable, script_timeout) },
+ { "RecoveryGracePeriod", 60, offsetof(struct ctdb_tunable, recovery_grace_period) },
+ { "RecoveryBanPeriod", 300, offsetof(struct ctdb_tunable, recovery_ban_period) },
+ { "DatabaseHashSize", 10000, offsetof(struct ctdb_tunable, database_hash_size) },
+ { "RerecoveryTimeout", 10, offsetof(struct ctdb_tunable, rerecovery_timeout) },
+};
+
+/*
+ set all tunables to defaults
+ */
+void ctdb_tunables_set_defaults(struct ctdb_context *ctdb)
+{
+ int i;
+ for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
+ *(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable) = tunable_map[i].default_v;
+ }
+}
+
+
+/*
+ get a tunable
+ */
+int32_t ctdb_control_get_tunable(struct ctdb_context *ctdb, TDB_DATA indata,
+ TDB_DATA *outdata)
+{
+ struct ctdb_control_get_tunable *t =
+ (struct ctdb_control_get_tunable *)indata.dptr;
+ char *name;
+ uint32_t val;
+ int i;
+
+ if (indata.dsize < sizeof(*t) ||
+ t->length > indata.dsize - offsetof(struct ctdb_control_get_tunable, name)) {
+ DEBUG(0,("Bad indata in ctdb_control_get_tunable\n"));
+ return -1;
+ }
+
+ name = talloc_strndup(ctdb, (char*)t->name, t->length);
+ CTDB_NO_MEMORY(ctdb, name);
+
+ for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
+ if (strcasecmp(name, tunable_map[i].name) == 0) break;
+ }
+ talloc_free(name);
+
+ if (i == ARRAY_SIZE(tunable_map)) {
+ return -1;
+ }
+
+ val = *(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable);
+
+ outdata->dptr = (uint8_t *)talloc(outdata, uint32_t);
+ CTDB_NO_MEMORY(ctdb, outdata->dptr);
+
+ *(uint32_t *)outdata->dptr = val;
+ outdata->dsize = sizeof(uint32_t);
+
+ return 0;
+}
+
+
+/*
+ set a tunable
+ */
+int32_t ctdb_control_set_tunable(struct ctdb_context *ctdb, TDB_DATA indata)
+{
+ struct ctdb_control_set_tunable *t =
+ (struct ctdb_control_set_tunable *)indata.dptr;
+ char *name;
+ int i;
+
+ if (indata.dsize < sizeof(*t) ||
+ t->length > indata.dsize - offsetof(struct ctdb_control_set_tunable, name)) {
+ DEBUG(0,("Bad indata in ctdb_control_set_tunable\n"));
+ return -1;
+ }
+
+ name = talloc_strndup(ctdb, (char *)t->name, t->length);
+ CTDB_NO_MEMORY(ctdb, name);
+
+ for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
+ if (strcasecmp(name, tunable_map[i].name) == 0) break;
+ }
+
+ talloc_free(name);
+
+ if (i == ARRAY_SIZE(tunable_map)) {
+ return -1;
+ }
+
+ *(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable) = t->value;
+
+ return 0;
+}
+
+/*
+ list tunables
+ */
+int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb, TDB_DATA *outdata)
+{
+ char *list = NULL;
+ int i;
+ struct ctdb_control_list_tunable *t;
+
+ list = talloc_strdup(outdata, tunable_map[0].name);
+ CTDB_NO_MEMORY(ctdb, list);
+
+ for (i=1;i<ARRAY_SIZE(tunable_map);i++) {
+ list = talloc_asprintf_append(list, ":%s", tunable_map[i].name);
+ CTDB_NO_MEMORY(ctdb, list);
+ }
+
+ outdata->dsize = offsetof(struct ctdb_control_list_tunable, data) +
+ strlen(list) + 1;
+ outdata->dptr = talloc_size(outdata, outdata->dsize);
+ CTDB_NO_MEMORY(ctdb, outdata->dptr);
+
+ t = (struct ctdb_control_list_tunable *)outdata->dptr;
+ t->length = strlen(list)+1;
+
+ memcpy(t->data, list, t->length);
+ talloc_free(list);
+
+ return 0;
+}
diff --git a/source4/cluster/ctdb/server/ctdbd.c b/source4/cluster/ctdb/server/ctdbd.c
new file mode 100644
index 0000000000..2c4a23b673
--- /dev/null
+++ b/source4/cluster/ctdb/server/ctdbd.c
@@ -0,0 +1,229 @@
+/*
+ standalone ctdb daemon
+
+ Copyright (C) Andrew Tridgell 2006
+
+ 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 "lib/events/events.h"
+#include "system/filesys.h"
+#include "popt.h"
+#include "system/wait.h"
+#include "cmdline.h"
+#include "../include/ctdb_private.h"
+
+static void block_signal(int signum)
+{
+ struct sigaction act;
+
+ memset(&act, 0, sizeof(act));
+
+ act.sa_handler = SIG_IGN;
+ sigemptyset(&act.sa_mask);
+ sigaddset(&act.sa_mask, signum);
+ sigaction(signum, &act, NULL);
+}
+
+static struct {
+ const char *nlist;
+ const char *transport;
+ const char *myaddress;
+ const char *public_address_list;
+ const char *public_interface;
+ const char *event_script;
+ const char *logfile;
+ const char *recovery_lock_file;
+ const char *db_dir;
+} options = {
+ .nlist = ETCDIR "/ctdb/nodes",
+ .transport = "tcp",
+ .event_script = ETCDIR "/ctdb/events",
+ .logfile = VARDIR "/log/log.ctdb",
+ .db_dir = VARDIR "/ctdb",
+};
+
+
+/*
+ called by the transport layer when a packet comes in
+*/
+static void ctdb_recv_pkt(struct ctdb_context *ctdb, uint8_t *data, uint32_t length)
+{
+ struct ctdb_req_header *hdr = (struct ctdb_req_header *)data;
+
+ ctdb->statistics.node_packets_recv++;
+
+ /* up the counter for this source node, so we know its alive */
+ if (ctdb_validate_vnn(ctdb, hdr->srcnode)) {
+ /* as a special case, redirected calls don't increment the rx_cnt */
+ if (hdr->operation != CTDB_REQ_CALL ||
+ ((struct ctdb_req_call *)hdr)->hopcount == 0) {
+ ctdb->nodes[hdr->srcnode]->rx_cnt++;
+ }
+ }
+
+ ctdb_input_pkt(ctdb, hdr);
+}
+
+
+
+static const struct ctdb_upcalls ctdb_upcalls = {
+ .recv_pkt = ctdb_recv_pkt,
+ .node_dead = ctdb_node_dead,
+ .node_connected = ctdb_node_connected
+};
+
+
+
+/*
+ main program
+*/
+int main(int argc, const char *argv[])
+{
+ struct ctdb_context *ctdb;
+ int interactive = 0;
+
+ struct poptOption popt_options[] = {
+ POPT_AUTOHELP
+ POPT_CTDB_CMDLINE
+ { "interactive", 'i', POPT_ARG_NONE, &interactive, 0, "don't fork", NULL },
+ { "public-addresses", 0, POPT_ARG_STRING, &options.public_address_list, 0, "public address list file", "filename" },
+ { "public-interface", 0, POPT_ARG_STRING, &options.public_interface, 0, "public interface", "interface"},
+ { "event-script", 0, POPT_ARG_STRING, &options.event_script, 0, "event script", "filename" },
+ { "logfile", 0, POPT_ARG_STRING, &options.logfile, 0, "log file location", "filename" },
+ { "nlist", 0, POPT_ARG_STRING, &options.nlist, 0, "node list file", "filename" },
+ { "listen", 0, POPT_ARG_STRING, &options.myaddress, 0, "address to listen on", "address" },
+ { "transport", 0, POPT_ARG_STRING, &options.transport, 0, "protocol transport", NULL },
+ { "dbdir", 0, POPT_ARG_STRING, &options.db_dir, 0, "directory for the tdb files", NULL },
+ { "reclock", 0, POPT_ARG_STRING, &options.recovery_lock_file, 0, "location of recovery lock file", "filename" },
+ POPT_TABLEEND
+ };
+ int opt, ret;
+ const char **extra_argv;
+ int extra_argc = 0;
+ poptContext pc;
+ struct event_context *ev;
+
+ pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
+
+ while ((opt = poptGetNextOpt(pc)) != -1) {
+ switch (opt) {
+ default:
+ fprintf(stderr, "Invalid option %s: %s\n",
+ poptBadOption(pc, 0), poptStrerror(opt));
+ exit(1);
+ }
+ }
+
+ /* setup the remaining options for the main program to use */
+ extra_argv = poptGetArgs(pc);
+ if (extra_argv) {
+ extra_argv++;
+ while (extra_argv[extra_argc]) extra_argc++;
+ }
+
+ if (!options.recovery_lock_file) {
+ DEBUG(0,("You must specifiy the location of a recovery lock file with --reclock\n"));
+ exit(1);
+ }
+
+ block_signal(SIGPIPE);
+
+ ev = event_context_init(NULL);
+
+ ctdb = ctdb_cmdline_init(ev);
+
+ ctdb->recovery_mode = CTDB_RECOVERY_NORMAL;
+ ctdb->recovery_master = (uint32_t)-1;
+ ctdb->upcalls = &ctdb_upcalls;
+ ctdb->idr = idr_init(ctdb);
+ ctdb->recovery_lock_fd = -1;
+ ctdb->monitoring_mode = CTDB_MONITORING_ACTIVE;
+
+ ctdb_tunables_set_defaults(ctdb);
+
+ ret = ctdb_set_recovery_lock_file(ctdb, options.recovery_lock_file);
+ if (ret == -1) {
+ printf("ctdb_set_recovery_lock_file failed - %s\n", ctdb_errstr(ctdb));
+ exit(1);
+ }
+
+ ret = ctdb_set_transport(ctdb, options.transport);
+ if (ret == -1) {
+ printf("ctdb_set_transport failed - %s\n", ctdb_errstr(ctdb));
+ exit(1);
+ }
+
+ /* tell ctdb what address to listen on */
+ if (options.myaddress) {
+ ret = ctdb_set_address(ctdb, options.myaddress);
+ if (ret == -1) {
+ printf("ctdb_set_address failed - %s\n", ctdb_errstr(ctdb));
+ exit(1);
+ }
+ }
+
+ /* tell ctdb what nodes are available */
+ ret = ctdb_set_nlist(ctdb, options.nlist);
+ if (ret == -1) {
+ printf("ctdb_set_nlist failed - %s\n", ctdb_errstr(ctdb));
+ exit(1);
+ }
+
+ if (options.db_dir) {
+ ret = ctdb_set_tdb_dir(ctdb, options.db_dir);
+ if (ret == -1) {
+ printf("ctdb_set_tdb_dir failed - %s\n", ctdb_errstr(ctdb));
+ exit(1);
+ }
+ }
+
+ ret = ctdb_set_logfile(ctdb, options.logfile);
+ if (ret == -1) {
+ printf("ctdb_set_logfile to %s failed - %s\n", options.logfile, ctdb_errstr(ctdb));
+ exit(1);
+ }
+
+ if (options.public_interface) {
+ ctdb->takeover.interface = talloc_strdup(ctdb, options.public_interface);
+ CTDB_NO_MEMORY(ctdb, ctdb->takeover.interface);
+ }
+
+ if (options.public_address_list) {
+ ret = ctdb_set_public_addresses(ctdb, options.public_address_list);
+ if (ret == -1) {
+ printf("Unable to setup public address list\n");
+ exit(1);
+ }
+ ctdb->takeover.enabled = true;
+ }
+
+ ret = ctdb_set_event_script(ctdb, options.event_script);
+ if (ret == -1) {
+ printf("Unable to setup event script\n");
+ exit(1);
+ }
+
+ /* useful default logfile */
+ if (ctdb->logfile == NULL) {
+ char *name = talloc_asprintf(ctdb, "%s/log.ctdb.vnn%u",
+ VARDIR, ctdb->vnn);
+ ctdb_set_logfile(ctdb, name);
+ talloc_free(name);
+ }
+
+ /* start the protocol running (as a child) */
+ return ctdb_start_daemon(ctdb, interactive?False:True);
+}
diff --git a/source4/cluster/ctdb/server/eventscript.c b/source4/cluster/ctdb/server/eventscript.c
new file mode 100644
index 0000000000..e23157056c
--- /dev/null
+++ b/source4/cluster/ctdb/server/eventscript.c
@@ -0,0 +1,191 @@
+/*
+ event script handling
+
+ Copyright (C) Andrew Tridgell 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 "system/filesys.h"
+#include "system/wait.h"
+#include "../include/ctdb_private.h"
+#include "lib/events/events.h"
+
+/*
+ run the event script - varargs version
+ */
+static int ctdb_event_script_v(struct ctdb_context *ctdb, const char *fmt, va_list ap)
+{
+ char *options, *cmdstr;
+ int ret;
+ va_list ap2;
+ struct stat st;
+
+ if (stat(ctdb->takeover.event_script, &st) != 0 &&
+ errno == ENOENT) {
+ DEBUG(0,("No event script found at '%s'\n", ctdb->takeover.event_script));
+ return 0;
+ }
+
+ va_copy(ap2, ap);
+ options = talloc_vasprintf(ctdb, fmt, ap2);
+ va_end(ap2);
+ CTDB_NO_MEMORY(ctdb, options);
+
+ cmdstr = talloc_asprintf(ctdb, "%s %s", ctdb->takeover.event_script, options);
+ CTDB_NO_MEMORY(ctdb, cmdstr);
+
+ ret = system(cmdstr);
+ if (ret != -1) {
+ ret = WEXITSTATUS(ret);
+ }
+
+ talloc_free(cmdstr);
+ talloc_free(options);
+
+ return ret;
+}
+
+/*
+ run the event script
+ */
+int ctdb_event_script(struct ctdb_context *ctdb, const char *fmt, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start(ap, fmt);
+ ret = ctdb_event_script_v(ctdb, fmt, ap);
+ va_end(ap);
+
+ return ret;
+}
+
+
+struct ctdb_event_script_state {
+ struct ctdb_context *ctdb;
+ pid_t child;
+ void (*callback)(struct ctdb_context *, int, void *);
+ int fd[2];
+ void *private_data;
+};
+
+/* called when child is finished */
+static void ctdb_event_script_handler(struct event_context *ev, struct fd_event *fde,
+ uint16_t flags, void *p)
+{
+ struct ctdb_event_script_state *state =
+ talloc_get_type(p, struct ctdb_event_script_state);
+ int status = -1;
+ void (*callback)(struct ctdb_context *, int, void *) = state->callback;
+ void *private_data = state->private_data;
+ struct ctdb_context *ctdb = state->ctdb;
+
+ waitpid(state->child, &status, 0);
+ if (status != -1) {
+ status = WEXITSTATUS(status);
+ }
+ talloc_set_destructor(state, NULL);
+ talloc_free(state);
+ callback(ctdb, status, private_data);
+}
+
+
+/* called when child times out */
+static void ctdb_event_script_timeout(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *p)
+{
+ struct ctdb_event_script_state *state = talloc_get_type(p, struct ctdb_event_script_state);
+ void (*callback)(struct ctdb_context *, int, void *) = state->callback;
+ void *private_data = state->private_data;
+ struct ctdb_context *ctdb = state->ctdb;
+
+ DEBUG(0,("event script timed out\n"));
+ talloc_free(state);
+ callback(ctdb, -1, private_data);
+}
+
+/*
+ destroy a running event script
+ */
+static int event_script_destructor(struct ctdb_event_script_state *state)
+{
+ kill(state->child, SIGKILL);
+ waitpid(state->child, NULL, 0);
+ return 0;
+}
+
+/*
+ run the event script in the background, calling the callback when
+ finished
+ */
+int ctdb_event_script_callback(struct ctdb_context *ctdb,
+ struct timeval timeout,
+ TALLOC_CTX *mem_ctx,
+ void (*callback)(struct ctdb_context *, int, void *),
+ void *private_data,
+ const char *fmt, ...)
+{
+ struct ctdb_event_script_state *state;
+ va_list ap;
+ int ret;
+
+ state = talloc(mem_ctx, struct ctdb_event_script_state);
+ CTDB_NO_MEMORY(ctdb, state);
+
+ state->ctdb = ctdb;
+ state->callback = callback;
+ state->private_data = private_data;
+
+ ret = pipe(state->fd);
+ if (ret != 0) {
+ talloc_free(state);
+ return -1;
+ }
+
+ state->child = fork();
+
+ if (state->child == (pid_t)-1) {
+ close(state->fd[0]);
+ close(state->fd[1]);
+ talloc_free(state);
+ return -1;
+ }
+
+ if (state->child == 0) {
+ close(state->fd[0]);
+ ctdb_set_realtime(false);
+ set_close_on_exec(state->fd[1]);
+ va_start(ap, fmt);
+ ret = ctdb_event_script_v(ctdb, fmt, ap);
+ va_end(ap);
+ _exit(ret);
+ }
+
+ talloc_set_destructor(state, event_script_destructor);
+
+ close(state->fd[1]);
+
+ event_add_fd(ctdb->ev, state, state->fd[0], EVENT_FD_READ|EVENT_FD_AUTOCLOSE,
+ ctdb_event_script_handler, state);
+
+ if (!timeval_is_zero(&timeout)) {
+ event_add_timed(ctdb->ev, state, timeout, ctdb_event_script_timeout, state);
+ }
+
+ return 0;
+}
+
+