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 #include "../lib/util/pidfile.h"
  48
  49 static struct files_struct *log_writeable_file_fn(
  50         struct files_struct *fsp, void *private_data)
  51 {
  52         bool *found = (bool *)private_data;
  53         char *path;
  54
  55         if (!fsp->can_write) {
  56                 return NULL;
  57         }
  58         if (!(*found)) {
  59                 DEBUG(0, ("Writable files open at exit:\n"));
  60                 *found = true;
  61         }
  62
  63         path = talloc_asprintf(talloc_tos(), "%s/%s", fsp->conn->connectpath,
  64                                smb_fname_str_dbg(fsp->fsp_name));
  65         if (path == NULL) {
  66                 DEBUGADD(0, ("<NOMEM>\n"));
  67         }
  68
  69         DEBUGADD(0, ("%s\n", path));
  70
  71         TALLOC_FREE(path);
  72         return NULL;
  73 }
  74
  75 /****************************************************************************
  76  Exit the server.
  77 ****************************************************************************/
  78
  79 /* Reasons for shutting down a server process. */
  80 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
  81
  82 static void exit_server_common(enum server_exit_reason how,
  83         const char *reason) _NORETURN_;
  84
  85 static void exit_server_common(enum server_exit_reason how,
  86         const char *reason)
  87 {
  88         struct smbXsrv_connection *conn = global_smbXsrv_connection;
  89         struct smbd_server_connection *sconn = NULL;
  90         struct messaging_context *msg_ctx = server_messaging_context();
  91
  92         if (conn != NULL) {
  93                 sconn = conn->sconn;
  94         }
  95
  96         if (!exit_firsttime)
  97                 exit(0);
  98         exit_firsttime = false;
  99
 100         change_to_root_user();
 101
 102         if (sconn) {
 103                 NTSTATUS status;
 104
 105                 if (NT_STATUS_IS_OK(sconn->status)) {
 106                         switch (how) {
 107                         case SERVER_EXIT_ABNORMAL:
 108                                 sconn->status = NT_STATUS_INTERNAL_ERROR;
 109                                 break;
 110                         case SERVER_EXIT_NORMAL:
 111                                 sconn->status = NT_STATUS_LOCAL_DISCONNECT;
 112                                 break;
 113                         }
 114                 }
 115
 116                 TALLOC_FREE(sconn->smb1.negprot.auth_context);
 117
 118                 if (lp_log_writeable_files_on_exit()) {
 119                         bool found = false;
 120                         files_forall(sconn, log_writeable_file_fn, &found);
 121                 }
 122
 123                 /*
 124                  * Note: this is a no-op for smb2 as
 125                  * conn->tcon_table is empty
 126                  */
 127                 status = smb1srv_tcon_disconnect_all(conn);
 128                 if (!NT_STATUS_IS_OK(status)) {
 129                         DEBUG(0,("Server exit (%s)\n",
 130                                 (reason ? reason : "normal exit")));
 131                         DEBUG(0, ("exit_server_common: "
 132                                   "smb1srv_tcon_disconnect_all() failed (%s) - "
 133                                   "triggering cleanup\n", nt_errstr(status)));
 134                         how = SERVER_EXIT_ABNORMAL;
 135                         reason = "smb1srv_tcon_disconnect_all failed";
 136                 }
 137
 138                 status = smbXsrv_session_logoff_all(conn);
 139                 if (!NT_STATUS_IS_OK(status)) {
 140                         DEBUG(0,("Server exit (%s)\n",
 141                                 (reason ? reason : "normal exit")));
 142                         DEBUG(0, ("exit_server_common: "
 143                                   "smbXsrv_session_logoff_all() failed (%s) - "
 144                                   "triggering cleanup\n", nt_errstr(status)));
 145                         how = SERVER_EXIT_ABNORMAL;
 146                         reason = "smbXsrv_session_logoff_all failed";
 147                 }
 148
 149                 change_to_root_user();
 150         }
 151
 152         /* 3 second timeout. */
 153         print_notify_send_messages(msg_ctx, 3);
 154
 155         /* delete our entry in the serverid database. */
 156         if (am_parent) {
 157                 /*
 158                  * For children the parent takes care of cleaning up
 159                  */
 160                 serverid_deregister(messaging_server_id(msg_ctx));
 161         }
 162
 163 #ifdef WITH_DFS
 164         if (dcelogin_atmost_once) {
 165                 dfs_unlogin();
 166         }
 167 #endif
 168
 169 #ifdef USE_DMAPI
 170         /* Destroy Samba DMAPI session only if we are master smbd process */
 171         if (am_parent) {
 172                 if (!dmapi_destroy_session()) {
 173                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 174                 }
 175         }
 176 #endif
 177
 178         if (am_parent) {
 179                 rpc_wkssvc_shutdown();
 180                 rpc_dssetup_shutdown();
 181 #ifdef DEVELOPER
 182                 rpc_rpcecho_shutdown();
 183 #endif
 184                 rpc_netdfs_shutdown();
 185                 rpc_initshutdown_shutdown();
 186                 rpc_eventlog_shutdown();
 187                 rpc_ntsvcs_shutdown();
 188                 rpc_svcctl_shutdown();
 189                 rpc_spoolss_shutdown();
 190
 191                 rpc_srvsvc_shutdown();
 192                 rpc_winreg_shutdown();
 193
 194                 rpc_netlogon_shutdown();
 195                 rpc_samr_shutdown();
 196                 rpc_lsarpc_shutdown();
 197         }
 198
 199         /*
 200          * we need to force the order of freeing the following,
 201          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 202          */
 203         sconn = NULL;
 204         conn = NULL;
 205         TALLOC_FREE(global_smbXsrv_connection);
 206         server_messaging_context_free();
 207         server_event_context_free();
 208         TALLOC_FREE(smbd_memcache_ctx);
 209
 210         locking_end();
 211         printing_end();
 212
 213         if (how != SERVER_EXIT_NORMAL) {
 214                 DEBUGSEP(0);
 215                 DEBUG(0,("Abnormal server exit: %s\n",
 216                         reason ? reason : "no explanation provided"));
 217                 DEBUGSEP(0);
 218
 219                 log_stack_trace();
 220
 221                 dump_core();
 222
 223                 /* Notreached. */
 224                 exit(1);
 225         } else {
 226                 DEBUG(3,("Server exit (%s)\n",
 227                         (reason ? reason : "normal exit")));
 228                 if (am_parent) {
 229                         pidfile_unlink(lp_piddir(), "smbd");
 230                 }
 231                 gencache_stabilize();
 232         }
 233
 234         exit(0);
 235 }
 236
 237 void smbd_exit_server(const char *const explanation)
 238 {
 239         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 240 }
 241
 242 void smbd_exit_server_cleanly(const char *const explanation)
 243 {
 244         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 245 }