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/*
Unix SMB/CIFS implementation.
Main SMB server routines
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Martin Pool 2002
Copyright (C) Jelmer Vernooij 2002-2003
Copyright (C) Volker Lendecke 1993-2007
Copyright (C) Jeremy Allison 1993-2007
Copyright (C) Andrew Bartlett 2010
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 "locking/share_mode_lock.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "ntdomain.h"
#include "librpc/rpc/dcesrv_core.h"
#include "printing/notify.h"
#include "printing.h"
#include "serverid.h"
#include "messages.h"
#include "passdb.h"
#include "../lib/util/pidfile.h"
#include "smbprofile.h"
#include "libcli/auth/netlogon_creds_cli.h"
#include "lib/gencache.h"
#include "rpc_server/rpc_config.h"
#include "lib/global_contexts.h"
static struct files_struct *log_writeable_file_fn(
struct files_struct *fsp, void *private_data)
{
bool *found = (bool *)private_data;
char *path;
if (!fsp->fsp_flags.can_write) {
return NULL;
}
if (!(*found)) {
DEBUG(0, ("Writable files open at exit:\n"));
*found = true;
}
path = talloc_asprintf(talloc_tos(), "%s/%s", fsp->conn->connectpath,
smb_fname_str_dbg(fsp->fsp_name));
if (path == NULL) {
DEBUGADD(0, ("<NOMEM>\n"));
}
DEBUGADD(0, ("%s\n", path));
TALLOC_FREE(path);
return NULL;
}
/****************************************************************************
Exit the server.
****************************************************************************/
/* Reasons for shutting down a server process. */
enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
static void exit_server_common(enum server_exit_reason how,
const char *reason) _NORETURN_;
static void exit_server_common(enum server_exit_reason how,
const char *reason)
{
struct smbXsrv_client *client = global_smbXsrv_client;
struct smbXsrv_connection *xconn = NULL;
struct smbd_server_connection *sconn = NULL;
NTSTATUS disconnect_status;
if (!exit_firsttime) {
exit(0);
}
exit_firsttime = false;
switch (how) {
case SERVER_EXIT_NORMAL:
disconnect_status = NT_STATUS_LOCAL_DISCONNECT;
break;
case SERVER_EXIT_ABNORMAL:
default:
disconnect_status = NT_STATUS_INTERNAL_ERROR;
break;
}
if (client != NULL) {
NTSTATUS status;
sconn = client->sconn;
xconn = client->connections;
/*
* Make sure we stop handling new multichannel
* connections early!
*
* From here, we're not able to handle them.
*/
status = smbXsrv_client_remove(client);
if (!NT_STATUS_IS_OK(status)) {
D_ERR("Server exit (%s)\n",
(reason ? reason : "normal exit"));
DBG_ERR("smbXsrv_client_remove() failed (%s)\n",
nt_errstr(status));
}
}
change_to_root_user();
/*
* Here we typically have just one connection
*/
for (; xconn != NULL; xconn = xconn->next) {
/*
* This is typically the disconnect for the only
* (or with multi-channel last) connection of the client.
*
* smbXsrv_connection_disconnect_transport() might be called already,
* but calling it again is a no-op.
*/
smbXsrv_connection_disconnect_transport(xconn, disconnect_status);
}
change_to_root_user();
if (sconn != NULL) {
if (lp_log_writeable_files_on_exit()) {
bool found = false;
files_forall(sconn, log_writeable_file_fn, &found);
}
}
change_to_root_user();
if (client != NULL) {
NTSTATUS status;
/*
* Note: this is a no-op for smb2 as
* conn->tcon_table is empty
*/
status = smb1srv_tcon_disconnect_all(client);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Server exit (%s)\n",
(reason ? reason : "normal exit")));
DEBUG(0, ("exit_server_common: "
"smb1srv_tcon_disconnect_all() failed (%s) - "
"triggering cleanup\n", nt_errstr(status)));
}
status = smbXsrv_session_logoff_all(client);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Server exit (%s)\n",
(reason ? reason : "normal exit")));
DEBUG(0, ("exit_server_common: "
"smbXsrv_session_logoff_all() failed (%s) - "
"triggering cleanup\n", nt_errstr(status)));
}
}
change_to_root_user();
if (client != NULL) {
struct smbXsrv_connection *xconn_next = NULL;
for (xconn = client->connections;
xconn != NULL;
xconn = xconn_next) {
xconn_next = xconn->next;
DLIST_REMOVE(client->connections, xconn);
TALLOC_FREE(xconn);
}
}
change_to_root_user();
#ifdef USE_DMAPI
/* Destroy Samba DMAPI session only if we are master smbd process */
if (am_parent) {
if (!dmapi_destroy_session()) {
DEBUG(0,("Unable to close Samba DMAPI session\n"));
}
}
#endif
/*
* we need to force the order of freeing the following,
* because smbd_msg_ctx is not a talloc child of smbd_server_conn.
*/
if (client != NULL) {
TALLOC_FREE(client->sconn);
}
sconn = NULL;
xconn = NULL;
client = NULL;
netlogon_creds_cli_close_global_db();
TALLOC_FREE(global_smbXsrv_client);
smbprofile_dump();
global_messaging_context_free();
global_event_context_free();
TALLOC_FREE(smbd_memcache_ctx);
locking_end();
if (how != SERVER_EXIT_NORMAL) {
smb_panic(reason);
/* Notreached. */
exit(1);
} else {
DEBUG(3,("Server exit (%s)\n",
(reason ? reason : "normal exit")));
if (am_parent) {
pidfile_unlink(lp_pid_directory(), "smbd");
}
}
exit(0);
}
void smbd_exit_server(const char *const explanation)
{
exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
}
void smbd_exit_server_cleanly(const char *const explanation)
{
exit_server_common(SERVER_EXIT_NORMAL, explanation);
}
/*
* reinit_after_fork() wrapper that should be called when forking from
* smbd.
*/
NTSTATUS smbd_reinit_after_fork(struct messaging_context *msg_ctx,
struct tevent_context *ev_ctx,
bool parent_longlived, const char *comment)
{
NTSTATUS ret;
am_parent = NULL;
ret = reinit_after_fork(msg_ctx, ev_ctx, parent_longlived, comment);
initialize_password_db(true, ev_ctx);
return ret;
}
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