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/*
* lock_daemon_config.c: virtlockd config file handling
*
* Copyright (C) 2006-2012 Red Hat, Inc.
* Copyright (C) 2006 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include "lock_daemon_config.h"
#include "virconf.h"
#include "viralloc.h"
#include "virerror.h"
#include "virlog.h"
#include "rpc/virnetdaemon.h"
#include "configmake.h"
#include "virstring.h"
#include "virutil.h"
#define VIR_FROM_THIS VIR_FROM_CONF
VIR_LOG_INIT("locking.lock_daemon_config");
/* A helper function used by each of the following macros. */
static int
checkType(virConfValuePtr p, const char *filename,
const char *key, virConfType required_type)
{
if (p->type != required_type) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("remoteReadConfigFile: %s: %s: invalid type:"
" got %s; expected %s"), filename, key,
virConfTypeToString(p->type),
virConfTypeToString(required_type));
return -1;
}
return 0;
}
/* If there is no config data for the key, #var_name, then do nothing.
If there is valid data of type VIR_CONF_STRING, and VIR_STRDUP succeeds,
store the result in var_name. Otherwise, (i.e. invalid type, or VIR_STRDUP
failure), give a diagnostic and "goto" the cleanup-and-fail label. */
#define GET_CONF_STR(conf, filename, var_name) \
do { \
virConfValuePtr p = virConfGetValue(conf, #var_name); \
if (p) { \
if (checkType(p, filename, #var_name, VIR_CONF_STRING) < 0) \
goto error; \
VIR_FREE(data->var_name); \
if (VIR_STRDUP(data->var_name, p->str) < 0) \
goto error; \
} \
} while (0)
/* Like GET_CONF_STR, but for signed integer values. */
#define GET_CONF_INT(conf, filename, var_name) \
do { \
virConfValuePtr p = virConfGetValue(conf, #var_name); \
if (p) { \
if (p->type != VIR_CONF_ULONG && \
checkType(p, filename, #var_name, VIR_CONF_LONG) < 0) \
goto error; \
data->var_name = p->l; \
} \
} while (0)
/* Like GET_CONF_STR, but for unsigned integer values. */
#define GET_CONF_UINT(conf, filename, var_name) \
do { \
virConfValuePtr p = virConfGetValue(conf, #var_name); \
if (p) { \
if (checkType(p, filename, #var_name, VIR_CONF_ULONG) < 0) \
goto error; \
data->var_name = p->l; \
} \
} while (0)
int
virLockDaemonConfigFilePath(bool privileged, char **configfile)
{
if (privileged) {
if (VIR_STRDUP(*configfile, SYSCONFDIR "/libvirt/virtlockd.conf") < 0)
goto error;
} else {
char *configdir = NULL;
if (!(configdir = virGetUserConfigDirectory()))
goto error;
if (virAsprintf(configfile, "%s/virtlockd.conf", configdir) < 0) {
VIR_FREE(configdir);
goto error;
}
VIR_FREE(configdir);
}
return 0;
error:
return -1;
}
virLockDaemonConfigPtr
virLockDaemonConfigNew(bool privileged ATTRIBUTE_UNUSED)
{
virLockDaemonConfigPtr data;
if (VIR_ALLOC(data) < 0)
return NULL;
data->max_clients = 1024;
return data;
}
void
virLockDaemonConfigFree(virLockDaemonConfigPtr data)
{
if (!data)
return;
VIR_FREE(data->log_filters);
VIR_FREE(data->log_outputs);
VIR_FREE(data);
}
static int
virLockDaemonConfigLoadOptions(virLockDaemonConfigPtr data,
const char *filename,
virConfPtr conf)
{
GET_CONF_UINT(conf, filename, log_level);
GET_CONF_STR(conf, filename, log_filters);
GET_CONF_STR(conf, filename, log_outputs);
GET_CONF_UINT(conf, filename, max_clients);
return 0;
error:
return -1;
}
/* Read the config file if it exists.
* Only used in the remote case, hence the name.
*/
int
virLockDaemonConfigLoadFile(virLockDaemonConfigPtr data,
const char *filename,
bool allow_missing)
{
virConfPtr conf;
int ret;
if (allow_missing &&
access(filename, R_OK) == -1 &&
errno == ENOENT)
return 0;
conf = virConfReadFile(filename, 0);
if (!conf)
return -1;
ret = virLockDaemonConfigLoadOptions(data, filename, conf);
virConfFree(conf);
return ret;
}
int virLockDaemonConfigLoadData(virLockDaemonConfigPtr data,
const char *filename,
const char *filedata)
{
virConfPtr conf;
int ret;
conf = virConfReadMem(filedata, strlen(filedata), 0);
if (!conf)
return -1;
ret = virLockDaemonConfigLoadOptions(data, filename, conf);
virConfFree(conf);
return ret;
}
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