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/** BEGIN COPYRIGHT BLOCK
* 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/>.
*
* Additional permission under GPLv3 section 7:
*
* In the following paragraph, "GPL" means the GNU General Public
* License, version 3 or any later version, and "Non-GPL Code" means
* code that is governed neither by the GPL nor a license
* compatible with the GPL.
*
* You may link the code of this Program with Non-GPL Code and convey
* linked combinations including the two, provided that such Non-GPL
* Code only links to the code of this Program through those well
* defined interfaces identified in the file named EXCEPTION found in
* the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline
* functions from the Approved Interfaces without causing the resulting
* work to be covered by the GPL. Only the copyright holders of this
* Program may make changes or additions to the list of Approved
* Interfaces.
*
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#include "slapi-plugin.h"
#include "repl-session-plugin.h"
#include "ipa-version.h"
#include "util.h"
#include <string.h>
/* Identify the type of data we're sending, an unsigned int in this case */
#define REPL_VERSION_DATA_GUID "2D562D8B-2F30-4447-AF76-2B721D1D5F6A"
#define IPA_PLUGIN_NAME "ipa_replication_version"
static char *data_version = NULL;
/*
* Plugin identifiers
*/
static Slapi_PluginDesc repl_version_pdesc = {
"ipa-repl-version-plugin",
"Red Hat, Inc.",
"1.0",
"IPA Replication version plugin"
};
static Slapi_ComponentId *repl_version_plugin_id = NULL;
/*
* Replication Version Callbacks
*/
/*
* This is called on a master when we are about to acquire a
* replica.
*
* Returning non-0 will abort the replication session. This
* results in the master going into incremental backoff mode.
*/
static int
repl_version_plugin_pre_acquire_cb(void *cookie, const Slapi_DN *repl_subtree,
int is_total, char **data_guid, struct berval **data)
{
LOG("repl_version_plugin_pre_acquire_cb() called for suffix \"%s\", "
"is_total: \"%s\".\n", slapi_sdn_get_ndn(repl_subtree),
is_total ? "TRUE" : "FALSE");
/* allocate some data to be sent to the replica */
*data_guid = slapi_ch_smprintf("%s", REPL_VERSION_DATA_GUID);
*data = (struct berval *)slapi_ch_malloc(sizeof(struct berval));
(*data)->bv_val = slapi_ch_smprintf("%s", data_version);
(*data)->bv_len = strlen((*data)->bv_val) + 1;
LOG("repl_version_plugin_pre_acquire_cb() sending data: guid: \"%s\" data: \"%s\".\n",
*data_guid, (*data)->bv_val);
return 0;
}
/*
* This is called on a replica when it receives a start replication
* extended operation from a master.
*
* The data sent by the master (version) is compared with our own
* hardcoded version to determine if replication can proceed or not.
*
* The replication plug-in will take care of freeing data_guid and data.
*
* Returning non-0 will abort the replication session. This
* results in the master going into incremental backoff mode.
*/
static int
repl_version_plugin_recv_acquire_cb(const char *repl_subtree, int is_total,
const char *data_guid, const struct berval *data)
{
LOG("test_repl_session_plugin_recv_acquire_cb() called for suffix \"%s\", is_total: \"%s\".\n",
repl_subtree, is_total ? "TRUE" : "FALSE");
/* compare our data version to the master data version */
if (data_guid && data && (strcmp(data_guid, REPL_VERSION_DATA_GUID) == 0)) {
LOG("repl_version_plugin_recv_acquire_cb() received data: guid: \"%s\" data: \"%s\".\n",
data_guid, data->bv_val);
if (!(strcmp(data_version, data->bv_val) == 0)) {
LOG_FATAL("Incompatible IPA versions, pausing replication. "
"This server: \"%s\" remote server: \"%s\".\n",
data_version, data->bv_val);
return 1;
}
}
return 0;
}
/*
* Callback list for registering API
*/
static void *repl_version_api[] = {
NULL, /* reserved for api broker use, must be zero */
NULL, /* init cb */
repl_version_plugin_pre_acquire_cb,
NULL, /* reply_acquire_cb */
NULL, /* post_acquire_cb */
repl_version_plugin_recv_acquire_cb,
NULL /* destroy cb */
};
/*
* Plug-in framework functions
*/
static int
repl_version_plugin_start(Slapi_PBlock *pb)
{
LOG("--> repl_version_plugin_start -- begin\n");
data_version = slapi_ch_smprintf("%llu", (unsigned long long) DATA_VERSION);
LOG("<-- repl_version_plugin_start -- end\n");
return 0;
}
static int
repl_version_plugin_close(Slapi_PBlock *pb)
{
LOG("--> repl_version_plugin_close -- begin\n");
slapi_apib_unregister(REPL_SESSION_v1_0_GUID);
slapi_ch_free_string(&data_version);
LOG("<-- repl_version_plugin_close -- end\n");
return 0;
}
int repl_version_plugin_init(Slapi_PBlock *pb)
{
LOG("--> repl_version_plugin_init -- begin\n");
if ( slapi_pblock_set( pb, SLAPI_PLUGIN_VERSION,
SLAPI_PLUGIN_VERSION_01 ) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_START_FN,
(void *) repl_version_plugin_start ) != 0 ||
slapi_pblock_set(pb, SLAPI_PLUGIN_CLOSE_FN,
(void *) repl_version_plugin_close ) != 0 ||
slapi_pblock_set( pb, SLAPI_PLUGIN_DESCRIPTION,
(void *)&repl_version_pdesc ) != 0 )
{
LOG_FATAL("<-- repl_version_plugin_init -- failed to register plugin -- end\n");
return -1;
}
if( slapi_apib_register(REPL_SESSION_v1_0_GUID, repl_version_api) ) {
LOG_FATAL("<-- repl_version_plugin_start -- failed to register repl_version api -- end\n");
return -1;
}
/* Retrieve and save the plugin identity to later pass to
internal operations */
if (slapi_pblock_get(pb, SLAPI_PLUGIN_IDENTITY, &repl_version_plugin_id) != 0) {
LOG_FATAL("<-- repl_version_plugin_init -- failed to retrieve plugin identity -- end\n");
return -1;
}
LOG("<-- repl_version_plugin_init -- end\n");
return 0;
}
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