source3/smbd/server_exit.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main SMB server routines
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Martin Pool                    2002
   6    Copyright (C) Jelmer Vernooij                2002-2003
   7    Copyright (C) Volker Lendecke                1993-2007
   8    Copyright (C) Jeremy Allison                 1993-2007
   9    Copyright (C) Andrew Bartlett                2010
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "smbd/smbd.h"
  27 #include "smbd/globals.h"
  28 #include "ntdomain.h"
  29 #include "../librpc/gen_ndr/srv_dfs.h"
  30 #include "../librpc/gen_ndr/srv_dssetup.h"
  31 #include "../librpc/gen_ndr/srv_echo.h"
  32 #include "../librpc/gen_ndr/srv_eventlog.h"
  33 #include "../librpc/gen_ndr/srv_initshutdown.h"
  34 #include "../librpc/gen_ndr/srv_lsa.h"
  35 #include "../librpc/gen_ndr/srv_netlogon.h"
  36 #include "../librpc/gen_ndr/srv_ntsvcs.h"
  37 #include "../librpc/gen_ndr/srv_samr.h"
  38 #include "../librpc/gen_ndr/srv_spoolss.h"
  39 #include "../librpc/gen_ndr/srv_srvsvc.h"
  40 #include "../librpc/gen_ndr/srv_svcctl.h"
  41 #include "../librpc/gen_ndr/srv_winreg.h"
  42 #include "../librpc/gen_ndr/srv_wkssvc.h"
  43 #include "printing/notify.h"
  44 #include "printing.h"
  45 #include "serverid.h"
  46 #include "messages.h"
  47
  48 static struct files_struct *log_writeable_file_fn(
  49         struct files_struct *fsp, void *private_data)
  50 {
  51         bool *found = (bool *)private_data;
  52         char *path;
  53
  54         if (!fsp->can_write) {
  55                 return NULL;
  56         }
  57         if (!(*found)) {
  58                 DEBUG(0, ("Writable files open at exit:\n"));
  59                 *found = true;
  60         }
  61
  62         path = talloc_asprintf(talloc_tos(), "%s/%s", fsp->conn->connectpath,
  63                                smb_fname_str_dbg(fsp->fsp_name));
  64         if (path == NULL) {
  65                 DEBUGADD(0, ("<NOMEM>\n"));
  66         }
  67
  68         DEBUGADD(0, ("%s\n", path));
  69
  70         TALLOC_FREE(path);
  71         return NULL;
  72 }
  73
  74 /****************************************************************************
  75  Exit the server.
  76 ****************************************************************************/
  77
  78 /* Reasons for shutting down a server process. */
  79 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
  80
  81 static void exit_server_common(enum server_exit_reason how,
  82         const char *reason) _NORETURN_;
  83
  84 static void exit_server_common(enum server_exit_reason how,
  85         const char *reason)
  86 {
  87         struct smbXsrv_connection *conn = global_smbXsrv_connection;
  88         struct smbd_server_connection *sconn = NULL;
  89         struct messaging_context *msg_ctx = server_messaging_context();
  90
  91         if (conn != NULL) {
  92                 sconn = conn->sconn;
  93         }
  94
  95         if (!exit_firsttime)
  96                 exit(0);
  97         exit_firsttime = false;
  98
  99         change_to_root_user();
 100
 101         if (sconn && sconn->smb1.negprot.auth_context) {
 102                 TALLOC_FREE(sconn->smb1.negprot.auth_context);
 103         }
 104
 105         if (sconn) {
 106                 NTSTATUS status;
 107
 108                 if (lp_log_writeable_files_on_exit()) {
 109                         bool found = false;
 110                         files_forall(sconn, log_writeable_file_fn, &found);
 111                 }
 112
 113                 /*
 114                  * Note: this is a no-op for smb2 as
 115                  * conn->tcon_table is empty
 116                  */
 117                 status = smb1srv_tcon_disconnect_all(conn);
 118                 if (!NT_STATUS_IS_OK(status)) {
 119                         DEBUG(0,("Server exit (%s)\n",
 120                                 (reason ? reason : "normal exit")));
 121                         DEBUG(0, ("exit_server_common: "
 122                                   "smb1srv_tcon_disconnect_all() failed (%s) - "
 123                                   "triggering cleanup\n", nt_errstr(status)));
 124                         how = SERVER_EXIT_ABNORMAL;
 125                         reason = "smb1srv_tcon_disconnect_all failed";
 126                 }
 127
 128                 status = smbXsrv_session_logoff_all(conn);
 129                 if (!NT_STATUS_IS_OK(status)) {
 130                         DEBUG(0,("Server exit (%s)\n",
 131                                 (reason ? reason : "normal exit")));
 132                         DEBUG(0, ("exit_server_common: "
 133                                   "smbXsrv_session_logoff_all() failed (%s) - "
 134                                   "triggering cleanup\n", nt_errstr(status)));
 135                         how = SERVER_EXIT_ABNORMAL;
 136                         reason = "smbXsrv_session_logoff_all failed";
 137                 }
 138
 139                 change_to_root_user();
 140         }
 141
 142         /* 3 second timeout. */
 143         print_notify_send_messages(msg_ctx, 3);
 144
 145         /* delete our entry in the serverid database. */
 146         if (am_parent) {
 147                 /*
 148                  * For children the parent takes care of cleaning up
 149                  */
 150                 serverid_deregister(messaging_server_id(msg_ctx));
 151         }
 152
 153 #ifdef WITH_DFS
 154         if (dcelogin_atmost_once) {
 155                 dfs_unlogin();
 156         }
 157 #endif
 158
 159 #ifdef USE_DMAPI
 160         /* Destroy Samba DMAPI session only if we are master smbd process */
 161         if (am_parent) {
 162                 if (!dmapi_destroy_session()) {
 163                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 164                 }
 165         }
 166 #endif
 167
 168         if (am_parent) {
 169                 rpc_wkssvc_shutdown();
 170                 rpc_dssetup_shutdown();
 171 #ifdef DEVELOPER
 172                 rpc_rpcecho_shutdown();
 173 #endif
 174                 rpc_netdfs_shutdown();
 175                 rpc_initshutdown_shutdown();
 176                 rpc_eventlog_shutdown();
 177                 rpc_ntsvcs_shutdown();
 178                 rpc_svcctl_shutdown();
 179                 rpc_spoolss_shutdown();
 180
 181                 rpc_srvsvc_shutdown();
 182                 rpc_winreg_shutdown();
 183
 184                 rpc_netlogon_shutdown();
 185                 rpc_samr_shutdown();
 186                 rpc_lsarpc_shutdown();
 187         }
 188
 189         /*
 190          * we need to force the order of freeing the following,
 191          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 192          */
 193         sconn = NULL;
 194         conn = NULL;
 195         TALLOC_FREE(global_smbXsrv_connection);
 196         server_messaging_context_free();
 197         server_event_context_free();
 198         TALLOC_FREE(smbd_memcache_ctx);
 199
 200         locking_end();
 201         printing_end();
 202
 203         if (how != SERVER_EXIT_NORMAL) {
 204                 DEBUGSEP(0);
 205                 DEBUG(0,("Abnormal server exit: %s\n",
 206                         reason ? reason : "no explanation provided"));
 207                 DEBUGSEP(0);
 208
 209                 log_stack_trace();
 210
 211                 dump_core();
 212
 213                 /* Notreached. */
 214                 exit(1);
 215         } else {
 216                 DEBUG(3,("Server exit (%s)\n",
 217                         (reason ? reason : "normal exit")));
 218                 if (am_parent) {
 219                         pidfile_unlink();
 220                 }
 221                 gencache_stabilize();
 222         }
 223
 224         exit(0);
 225 }
 226
 227 void exit_server(const char *const explanation)
 228 {
 229         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 230 }
 231
 232 void exit_server_cleanly(const char *const explanation)
 233 {
 234         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 235 }