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libvirt/daemon/libvirtd-config.c
Daniel P. Berrange 517368a377 Remove uid param from directory lookup APIs 
Remove the uid param from virGetUserConfigDirectory,
virGetUserCacheDirectory, virGetUserRuntimeDirectory,
and virGetUserDirectory

These functions were universally called with the
results of getuid() or geteuid(). To make it practical
to port to Win32, remove the uid parameter and hardcode
geteuid()

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-05-28 10:55:06 +01:00

497 lines
15 KiB
C
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/*
* libvirtd.c: daemon start of day, guest process & i/o management
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include "libvirtd-config.h"
#include "conf.h"
#include "memory.h"
#include "virterror_internal.h"
#include "logging.h"
#include "rpc/virnetserver.h"
#include "configmake.h"
#include "remote/remote_protocol.h"
#include "remote/remote_driver.h"
#define VIR_FROM_THIS VIR_FROM_CONF
#define virConfError(code, ...) \
virReportErrorHelper(VIR_FROM_THIS, code, __FILE__, \
__FUNCTION__, __LINE__, __VA_ARGS__)
/* Allocate an array of malloc'd strings from the config file, filename
* (used only in diagnostics), using handle "conf". Upon error, return -1
* and free any allocated memory. Otherwise, save the array in *list_arg
* and return 0.
*/
static int
remoteConfigGetStringList(virConfPtr conf, const char *key, char ***list_arg,
const char *filename)
{
char **list;
virConfValuePtr p = virConfGetValue (conf, key);
if (!p)
return 0;
switch (p->type) {
case VIR_CONF_STRING:
if (VIR_ALLOC_N(list, 2) < 0) {
virConfError(VIR_ERR_CONFIG_UNSUPPORTED,
_("failed to allocate memory for %s config list"),
key);
return -1;
}
list[0] = strdup (p->str);
list[1] = NULL;
if (list[0] == NULL) {
virConfError(VIR_ERR_CONFIG_UNSUPPORTED,
_("failed to allocate memory for %s config list value"),
key);
VIR_FREE(list);
return -1;
}
break;
case VIR_CONF_LIST: {
int i, len = 0;
virConfValuePtr pp;
for (pp = p->list; pp; pp = pp->next)
len++;
if (VIR_ALLOC_N(list, 1+len) < 0) {
virConfError(VIR_ERR_CONFIG_UNSUPPORTED,
_("failed to allocate memory for %s config list"),
key);
return -1;
}
for (i = 0, pp = p->list; pp; ++i, pp = pp->next) {
if (pp->type != VIR_CONF_STRING) {
virConfError(VIR_ERR_CONFIG_UNSUPPORTED,
_("remoteReadConfigFile: %s: %s:"
" must be a string or list of strings"),
filename, key);
VIR_FREE(list);
return -1;
}
list[i] = strdup (pp->str);
if (list[i] == NULL) {
int j;
for (j = 0 ; j < i ; j++)
VIR_FREE(list[j]);
VIR_FREE(list);
virConfError(VIR_ERR_CONFIG_UNSUPPORTED,
_("failed to allocate memory for %s config list value"),
key);
return -1;
}
}
list[i] = NULL;
break;
}
default:
virConfError(VIR_ERR_CONFIG_UNSUPPORTED,
_("remoteReadConfigFile: %s: %s:"
" must be a string or list of strings"),
filename, key);
return -1;
}
*list_arg = list;
return 0;
}
/* 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) {
virConfError(VIR_ERR_CONFIG_UNSUPPORTED,
_("remoteReadConfigFile: %s: %s: invalid type:"
" got %s; expected %s"), filename, key,
virConfTypeName (p->type),
virConfTypeName (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 strdup succeeds,
store the result in var_name. Otherwise, (i.e. invalid type, or 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 (!(data->var_name = strdup (p->str))) { \
virReportOOMError(); \
goto error; \
} \
} \
} while (0)
/* Like GET_CONF_STR, but for integral values. */
#define GET_CONF_INT(conf, filename, var_name) \
do { \
virConfValuePtr p = virConfGetValue (conf, #var_name); \
if (p) { \
if (checkType (p, filename, #var_name, VIR_CONF_LONG) < 0) \
goto error; \
data->var_name = p->l; \
} \
} while (0)
static int remoteConfigGetAuth(virConfPtr conf, const char *key, int *auth, const char *filename) {
virConfValuePtr p;
p = virConfGetValue (conf, key);
if (!p)
return 0;
if (checkType (p, filename, key, VIR_CONF_STRING) < 0)
return -1;
if (!p->str)
return 0;
if (STREQ(p->str, "none")) {
*auth = VIR_NET_SERVER_SERVICE_AUTH_NONE;
#if HAVE_SASL
} else if (STREQ(p->str, "sasl")) {
*auth = VIR_NET_SERVER_SERVICE_AUTH_SASL;
#endif
} else if (STREQ(p->str, "polkit")) {
*auth = VIR_NET_SERVER_SERVICE_AUTH_POLKIT;
} else {
virConfError(VIR_ERR_CONFIG_UNSUPPORTED,
_("remoteReadConfigFile: %s: %s: unsupported auth %s"),
filename, key, p->str);
return -1;
}
return 0;
}
int
daemonConfigFilePath(bool privileged, char **configfile)
{
if (privileged) {
if (!(*configfile = strdup(SYSCONFDIR "/libvirt/libvirtd.conf")))
goto no_memory;
} else {
char *configdir = NULL;
if (!(configdir = virGetUserConfigDirectory()))
goto error;
if (virAsprintf(configfile, "%s/libvirtd.conf", configdir) < 0) {
VIR_FREE(configdir);
goto no_memory;
}
VIR_FREE(configdir);
}
return 0;
no_memory:
virReportOOMError();
error:
return -1;
}
struct daemonConfig*
daemonConfigNew(bool privileged ATTRIBUTE_UNUSED)
{
struct daemonConfig *data;
char *localhost;
int ret;
if (VIR_ALLOC(data) < 0) {
virReportOOMError();
return NULL;
}
data->listen_tls = 1;
data->listen_tcp = 0;
if (!(data->tls_port = strdup(LIBVIRTD_TLS_PORT)))
goto no_memory;
if (!(data->tcp_port = strdup(LIBVIRTD_TCP_PORT)))
goto no_memory;
/* Only default to PolicyKit if running as root */
#if HAVE_POLKIT
if (privileged) {
data->auth_unix_rw = REMOTE_AUTH_POLKIT;
data->auth_unix_ro = REMOTE_AUTH_POLKIT;
} else {
#endif
data->auth_unix_rw = REMOTE_AUTH_NONE;
data->auth_unix_ro = REMOTE_AUTH_NONE;
#if HAVE_POLKIT
}
#endif
if (data->auth_unix_rw == REMOTE_AUTH_POLKIT)
data->unix_sock_rw_perms = strdup("0777"); /* Allow world */
else
data->unix_sock_rw_perms = strdup("0700"); /* Allow user only */
data->unix_sock_ro_perms = strdup("0777"); /* Always allow world */
if (!data->unix_sock_ro_perms ||
!data->unix_sock_rw_perms)
goto no_memory;
#if HAVE_SASL
data->auth_tcp = REMOTE_AUTH_SASL;
#else
data->auth_tcp = REMOTE_AUTH_NONE;
#endif
data->auth_tls = REMOTE_AUTH_NONE;
data->mdns_adv = 0;
data->min_workers = 5;
data->max_workers = 20;
data->max_clients = 20;
data->prio_workers = 5;
data->max_requests = 20;
data->max_client_requests = 5;
data->log_buffer_size = 64;
data->audit_level = 1;
data->audit_logging = 0;
data->keepalive_interval = 5;
data->keepalive_count = 5;
data->keepalive_required = 0;
localhost = virGetHostname(NULL);
if (localhost == NULL) {
/* we couldn't resolve the hostname; assume that we are
* running in disconnected operation, and report a less
* useful Avahi string
*/
ret = virAsprintf(&data->mdns_name, "Virtualization Host");
} else {
char *tmp;
/* Extract the host part of the potentially FQDN */
if ((tmp = strchr(localhost, '.')))
*tmp = '\0';
ret = virAsprintf(&data->mdns_name, "Virtualization Host %s",
localhost);
}
VIR_FREE(localhost);
if (ret < 0)
goto no_memory;
return data;
no_memory:
virReportOOMError();
daemonConfigFree(data);
return NULL;
}
void
daemonConfigFree(struct daemonConfig *data)
{
char **tmp;
if (!data)
return;
VIR_FREE(data->listen_addr);
VIR_FREE(data->tls_port);
VIR_FREE(data->tcp_port);
VIR_FREE(data->unix_sock_ro_perms);
VIR_FREE(data->unix_sock_rw_perms);
VIR_FREE(data->unix_sock_group);
VIR_FREE(data->unix_sock_dir);
VIR_FREE(data->mdns_name);
tmp = data->tls_allowed_dn_list;
while (tmp && *tmp) {
VIR_FREE(*tmp);
tmp++;
}
VIR_FREE(data->tls_allowed_dn_list);
tmp = data->sasl_allowed_username_list;
while (tmp && *tmp) {
VIR_FREE(*tmp);
tmp++;
}
VIR_FREE(data->sasl_allowed_username_list);
VIR_FREE(data->key_file);
VIR_FREE(data->ca_file);
VIR_FREE(data->cert_file);
VIR_FREE(data->crl_file);
VIR_FREE(data->host_uuid);
VIR_FREE(data->log_filters);
VIR_FREE(data->log_outputs);
VIR_FREE(data);
}
static int
daemonConfigLoadOptions(struct daemonConfig *data,
const char *filename,
virConfPtr conf)
{
GET_CONF_INT (conf, filename, listen_tcp);
GET_CONF_INT (conf, filename, listen_tls);
GET_CONF_STR (conf, filename, tls_port);
GET_CONF_STR (conf, filename, tcp_port);
GET_CONF_STR (conf, filename, listen_addr);
if (remoteConfigGetAuth(conf, "auth_unix_rw", &data->auth_unix_rw, filename) < 0)
goto error;
#if HAVE_POLKIT
/* Change default perms to be wide-open if PolicyKit is enabled.
* Admin can always override in config file
*/
if (data->auth_unix_rw == REMOTE_AUTH_POLKIT) {
VIR_FREE(data->unix_sock_rw_perms);
if (!(data->unix_sock_rw_perms = strdup("0777"))) {
virReportOOMError();
goto error;
}
}
#endif
if (remoteConfigGetAuth(conf, "auth_unix_ro", &data->auth_unix_ro, filename) < 0)
goto error;
if (remoteConfigGetAuth(conf, "auth_tcp", &data->auth_tcp, filename) < 0)
goto error;
if (remoteConfigGetAuth(conf, "auth_tls", &data->auth_tls, filename) < 0)
goto error;
GET_CONF_STR (conf, filename, unix_sock_group);
GET_CONF_STR (conf, filename, unix_sock_ro_perms);
GET_CONF_STR (conf, filename, unix_sock_rw_perms);
GET_CONF_STR (conf, filename, unix_sock_dir);
GET_CONF_INT (conf, filename, mdns_adv);
GET_CONF_STR (conf, filename, mdns_name);
GET_CONF_INT (conf, filename, tls_no_sanity_certificate);
GET_CONF_INT (conf, filename, tls_no_verify_certificate);
GET_CONF_STR (conf, filename, key_file);
GET_CONF_STR (conf, filename, cert_file);
GET_CONF_STR (conf, filename, ca_file);
GET_CONF_STR (conf, filename, crl_file);
if (remoteConfigGetStringList(conf, "tls_allowed_dn_list",
&data->tls_allowed_dn_list, filename) < 0)
goto error;
if (remoteConfigGetStringList(conf, "sasl_allowed_username_list",
&data->sasl_allowed_username_list, filename) < 0)
goto error;
GET_CONF_INT (conf, filename, min_workers);
GET_CONF_INT (conf, filename, max_workers);
GET_CONF_INT (conf, filename, max_clients);
GET_CONF_INT (conf, filename, prio_workers);
GET_CONF_INT (conf, filename, max_requests);
GET_CONF_INT (conf, filename, max_client_requests);
GET_CONF_INT (conf, filename, audit_level);
GET_CONF_INT (conf, filename, audit_logging);
GET_CONF_STR (conf, filename, host_uuid);
GET_CONF_INT (conf, filename, log_level);
GET_CONF_STR (conf, filename, log_filters);
GET_CONF_STR (conf, filename, log_outputs);
GET_CONF_INT (conf, filename, log_buffer_size);
GET_CONF_INT (conf, filename, keepalive_interval);
GET_CONF_INT (conf, filename, keepalive_count);
GET_CONF_INT (conf, filename, keepalive_required);
return 0;
error:
return -1;
}
/* Read the config file if it exists.
* Only used in the remote case, hence the name.
*/
int
daemonConfigLoadFile(struct daemonConfig *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 = daemonConfigLoadOptions(data, filename, conf);
virConfFree(conf);
return ret;
}
int daemonConfigLoadData(struct daemonConfig *data,
const char *filename,
const char *filedata)
{
virConfPtr conf;
int ret;
conf = virConfReadMem(filedata, strlen(filedata), 0);
if (!conf)
return -1;
ret = daemonConfigLoadOptions(data, filename, conf);
virConfFree(conf);
return ret;
}
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