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/globals.h"
  27 #include "librpc/gen_ndr/messaging.h"
  28
  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
  46 static struct files_struct *log_writeable_file_fn(
  47         struct files_struct *fsp, void *private_data)
  48 {
  49         bool *found = (bool *)private_data;
  50         char *path;
  51
  52         if (!fsp->can_write) {
  53                 return NULL;
  54         }
  55         if (!(*found)) {
  56                 DEBUG(0, ("Writable files open at exit:\n"));
  57                 *found = true;
  58         }
  59
  60         path = talloc_asprintf(talloc_tos(), "%s/%s", fsp->conn->connectpath,
  61                                smb_fname_str_dbg(fsp->fsp_name));
  62         if (path == NULL) {
  63                 DEBUGADD(0, ("<NOMEM>\n"));
  64         }
  65
  66         DEBUGADD(0, ("%s\n", path));
  67
  68         TALLOC_FREE(path);
  69         return NULL;
  70 }
  71
  72 /****************************************************************************
  73  Exit the server.
  74 ****************************************************************************/
  75
  76 /* Reasons for shutting down a server process. */
  77 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
  78
  79 static void exit_server_common(enum server_exit_reason how,
  80         const char *const reason) _NORETURN_;
  81
  82 static void exit_server_common(enum server_exit_reason how,
  83         const char *const reason)
  84 {
  85         bool had_open_conn = false;
  86         struct smbd_server_connection *sconn = smbd_server_conn;
  87
  88         if (!exit_firsttime)
  89                 exit(0);
  90         exit_firsttime = false;
  91
  92         change_to_root_user();
  93
  94         if (sconn && sconn->smb1.negprot.auth_context) {
  95                 TALLOC_FREE(sconn->smb1.negprot.auth_context);
  96         }
  97
  98         if (sconn) {
  99                 if (lp_log_writeable_files_on_exit()) {
 100                         bool found = false;
 101                         files_forall(sconn, log_writeable_file_fn, &found);
 102                 }
 103                 had_open_conn = conn_close_all(sconn);
 104                 invalidate_all_vuids(sconn);
 105         }
 106
 107         /* 3 second timeout. */
 108         print_notify_send_messages(sconn->msg_ctx, 3);
 109
 110         /* delete our entry in the serverid database. */
 111         if (am_parent) {
 112                 /*
 113                  * For children the parent takes care of cleaning up
 114                  */
 115                 serverid_deregister(sconn_server_id(sconn));
 116         }
 117
 118 #ifdef WITH_DFS
 119         if (dcelogin_atmost_once) {
 120                 dfs_unlogin();
 121         }
 122 #endif
 123
 124 #ifdef USE_DMAPI
 125         /* Destroy Samba DMAPI session only if we are master smbd process */
 126         if (am_parent) {
 127                 if (!dmapi_destroy_session()) {
 128                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 129                 }
 130         }
 131 #endif
 132
 133         if (am_parent) {
 134                 rpc_wkssvc_shutdown();
 135                 rpc_dssetup_shutdown();
 136 #ifdef DEVELOPER
 137                 rpc_rpcecho_shutdown();
 138 #endif
 139                 rpc_netdfs_shutdown();
 140                 rpc_initshutdown_shutdown();
 141                 rpc_eventlog_shutdown();
 142                 rpc_ntsvcs_shutdown();
 143                 rpc_svcctl_shutdown();
 144                 rpc_spoolss_shutdown();
 145
 146                 rpc_srvsvc_shutdown();
 147                 rpc_winreg_shutdown();
 148
 149                 rpc_netlogon_shutdown();
 150                 rpc_samr_shutdown();
 151                 rpc_lsarpc_shutdown();
 152         }
 153
 154         locking_end();
 155         printing_end();
 156
 157         /*
 158          * we need to force the order of freeing the following,
 159          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 160          */
 161         sconn = NULL;
 162         TALLOC_FREE(smbd_server_conn);
 163         server_messaging_context_free();
 164         server_event_context_free();
 165         TALLOC_FREE(smbd_memcache_ctx);
 166
 167         if (how != SERVER_EXIT_NORMAL) {
 168                 DEBUGSEP(0);
 169                 DEBUG(0,("Abnormal server exit: %s\n",
 170                         reason ? reason : "no explanation provided"));
 171                 DEBUGSEP(0);
 172
 173                 log_stack_trace();
 174
 175                 dump_core();
 176
 177         } else {
 178                 DEBUG(3,("Server exit (%s)\n",
 179                         (reason ? reason : "normal exit")));
 180                 if (am_parent) {
 181                         pidfile_unlink();
 182                 }
 183                 gencache_stabilize();
 184         }
 185
 186         /* if we had any open SMB connections when we exited then we
 187            need to tell the parent smbd so that it can trigger a retry
 188            of any locks we may have been holding or open files we were
 189            blocking */
 190         if (had_open_conn) {
 191                 exit(1);
 192         } else {
 193                 exit(0);
 194         }
 195 }
 196
 197 void exit_server(const char *const explanation)
 198 {
 199         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 200 }
 201
 202 void exit_server_cleanly(const char *const explanation)
 203 {
 204         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 205 }
 206
 207 void exit_server_fault(void)
 208 {
 209         exit_server("critical server fault");
 210 }