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/*
Unix SMB/CIFS implementation.
ctdb clustering hooks
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "lib/events/events.h"
#include "cluster/cluster.h"
#include "system/filesys.h"
#include "cluster/cluster_private.h"
#include "lib/tdb/include/tdb.h"
#include "cluster/ctdb/include/ctdb.h"
#include "db_wrap.h"
struct cluster_state {
struct ctdb_context *ctdb;
};
/*
return a server_id for a ctdb node
*/
static struct server_id ctdb_id(struct cluster_ops *ops, uint32_t id)
{
struct ctdb_context *ctdb = ops->private;
struct server_id server_id;
server_id.node = ctdb_get_vnn(ctdb);
server_id.id = id;
return server_id;
}
/*
return a server_id as a string
*/
static const char *ctdb_id_string(struct cluster_ops *ops,
TALLOC_CTX *mem_ctx, struct server_id id)
{
return talloc_asprintf(mem_ctx, "%u.%u", id.node, id.id);
}
/*
this is an interim method for subsystems that have not yet been
converted to use the ctdb api. It opens a shared database in the
cluster temporary area, using TDB_CLEAR_IF_FIRST which relies on
correct operation of fcntl locks on the shared fileystem.
*/
static struct tdb_wrap *ctdb_tdb_tmp_open(struct cluster_ops *ops,
TALLOC_CTX *mem_ctx, const char *dbname,
int flags)
{
const char *dir = lp_parm_string(-1, "ctdb", "shared data");
char *path;
struct tdb_wrap *w;
if (dir == NULL) {
DEBUG(0,("ERROR: You must set 'ctdb:shared data' to a cluster shared path\n"));
return NULL;
}
path = talloc_asprintf(mem_ctx, "%s/%s", dir, dbname);
w = tdb_wrap_open(mem_ctx, path, 0,
flags | TDB_CLEAR_IF_FIRST,
O_RDWR|O_CREAT, 0600);
talloc_free(path);
return w;
}
static struct cluster_ops cluster_ctdb_ops = {
.cluster_id = ctdb_id,
.cluster_id_string = ctdb_id_string,
.cluster_tdb_tmp_open = ctdb_tdb_tmp_open,
.private = NULL
};
/* initialise ctdb */
void cluster_ctdb_init(struct event_context *ev)
{
const char *nlist;
const char *address;
const char *transport;
struct cluster_state *state;
int ret, lacount;
nlist = lp_parm_string(-1, "ctdb", "nlist");
if (nlist == NULL) return;
address = lp_parm_string(-1, "ctdb", "address");
if (address == NULL) return;
transport = lp_parm_string(-1, "ctdb", "transport");
if (transport == NULL) {
transport = "tcp";
}
state = talloc(ev, struct cluster_state);
if (state == NULL) goto failed;
state->ctdb = ctdb_init(ev);
if (state->ctdb == NULL) goto failed;
cluster_ctdb_ops.private = state->ctdb;
ret = ctdb_set_transport(state->ctdb, transport);
if (ret == -1) {
DEBUG(0,("ctdb_set_transport failed - %s\n",
ctdb_errstr(state->ctdb)));
goto failed;
}
if (lp_parm_bool(-1, "ctdb", "selfconnect", False)) {
DEBUG(0,("Enabling ctdb selfconnect\n"));
ctdb_set_flags(state->ctdb, CTDB_FLAG_SELF_CONNECT);
}
lacount = lp_parm_int(-1, "ctdb", "maxlacount", -1);
if (lacount != -1) {
ctdb_set_max_lacount(state->ctdb, lacount);
}
/* tell ctdb what address to listen on */
ret = ctdb_set_address(state->ctdb, address);
if (ret == -1) {
DEBUG(0,("ctdb_set_address failed - %s\n", ctdb_errstr(state->ctdb)));
goto failed;
}
/* tell ctdb what nodes are available */
ret = ctdb_set_nlist(state->ctdb, nlist);
if (ret == -1) {
DEBUG(0,("ctdb_set_nlist failed - %s\n", ctdb_errstr(state->ctdb)));
goto failed;
}
ret = ctdb_attach(state->ctdb, "cluster.tdb", TDB_DEFAULT, O_RDWR|O_CREAT|O_TRUNC, 0666);
if (ret == -1) {
DEBUG(0,("ctdb_attach failed - %s\n", ctdb_errstr(state->ctdb)));
goto failed;
}
/* start the protocol running */
ret = ctdb_start(state->ctdb);
if (ret == -1) {
DEBUG(0,("ctdb_start failed - %s\n", ctdb_errstr(state->ctdb)));
goto failed;
}
/* wait until all nodes are connected (should not be needed
outide of test code) */
ctdb_connect_wait(state->ctdb);
cluster_set_ops(&cluster_ctdb_ops);
return;
failed:
DEBUG(0,("cluster_ctdb_init failed\n"));
talloc_free(state);
}
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