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 "librpc/gen_ndr/messaging.h"
  29
  30 #include "../librpc/gen_ndr/srv_dfs.h"
  31 #include "../librpc/gen_ndr/srv_dssetup.h"
  32 #include "../librpc/gen_ndr/srv_echo.h"
  33 #include "../librpc/gen_ndr/srv_eventlog.h"
  34 #include "../librpc/gen_ndr/srv_initshutdown.h"
  35 #include "../librpc/gen_ndr/srv_lsa.h"
  36 #include "../librpc/gen_ndr/srv_netlogon.h"
  37 #include "../librpc/gen_ndr/srv_ntsvcs.h"
  38 #include "../librpc/gen_ndr/srv_samr.h"
  39 #include "../librpc/gen_ndr/srv_spoolss.h"
  40 #include "../librpc/gen_ndr/srv_srvsvc.h"
  41 #include "../librpc/gen_ndr/srv_svcctl.h"
  42 #include "../librpc/gen_ndr/srv_winreg.h"
  43 #include "../librpc/gen_ndr/srv_wkssvc.h"
  44 #include "printing/notify.h"
  45 #include "printing.h"
  46 #include "serverid.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 *const reason) _NORETURN_;
  83
  84 static void exit_server_common(enum server_exit_reason how,
  85         const char *const reason)
  86 {
  87         bool had_open_conn = false;
  88         struct smbd_server_connection *sconn = smbd_server_conn;
  89
  90         if (!exit_firsttime)
  91                 exit(0);
  92         exit_firsttime = false;
  93
  94         change_to_root_user();
  95
  96         if (sconn && sconn->smb1.negprot.auth_context) {
  97                 TALLOC_FREE(sconn->smb1.negprot.auth_context);
  98         }
  99
 100         if (sconn) {
 101                 if (lp_log_writeable_files_on_exit()) {
 102                         bool found = false;
 103                         files_forall(sconn, log_writeable_file_fn, &found);
 104                 }
 105                 had_open_conn = conn_close_all(sconn);
 106                 invalidate_all_vuids(sconn);
 107         }
 108
 109         /* 3 second timeout. */
 110         print_notify_send_messages(sconn->msg_ctx, 3);
 111
 112         /* delete our entry in the serverid database. */
 113         if (am_parent) {
 114                 /*
 115                  * For children the parent takes care of cleaning up
 116                  */
 117                 serverid_deregister(sconn_server_id(sconn));
 118         }
 119
 120 #ifdef WITH_DFS
 121         if (dcelogin_atmost_once) {
 122                 dfs_unlogin();
 123         }
 124 #endif
 125
 126 #ifdef USE_DMAPI
 127         /* Destroy Samba DMAPI session only if we are master smbd process */
 128         if (am_parent) {
 129                 if (!dmapi_destroy_session()) {
 130                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 131                 }
 132         }
 133 #endif
 134
 135         if (am_parent) {
 136                 rpc_wkssvc_shutdown();
 137                 rpc_dssetup_shutdown();
 138 #ifdef DEVELOPER
 139                 rpc_rpcecho_shutdown();
 140 #endif
 141                 rpc_netdfs_shutdown();
 142                 rpc_initshutdown_shutdown();
 143                 rpc_eventlog_shutdown();
 144                 rpc_ntsvcs_shutdown();
 145                 rpc_svcctl_shutdown();
 146                 rpc_spoolss_shutdown();
 147
 148                 rpc_srvsvc_shutdown();
 149                 rpc_winreg_shutdown();
 150
 151                 rpc_netlogon_shutdown();
 152                 rpc_samr_shutdown();
 153                 rpc_lsarpc_shutdown();
 154         }
 155
 156         locking_end();
 157         printing_end();
 158
 159         /*
 160          * we need to force the order of freeing the following,
 161          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 162          */
 163         sconn = NULL;
 164         TALLOC_FREE(smbd_server_conn);
 165         server_messaging_context_free();
 166         server_event_context_free();
 167         TALLOC_FREE(smbd_memcache_ctx);
 168
 169         if (how != SERVER_EXIT_NORMAL) {
 170                 DEBUGSEP(0);
 171                 DEBUG(0,("Abnormal server exit: %s\n",
 172                         reason ? reason : "no explanation provided"));
 173                 DEBUGSEP(0);
 174
 175                 log_stack_trace();
 176
 177                 dump_core();
 178
 179         } else {
 180                 DEBUG(3,("Server exit (%s)\n",
 181                         (reason ? reason : "normal exit")));
 182                 if (am_parent) {
 183                         pidfile_unlink();
 184                 }
 185                 gencache_stabilize();
 186         }
 187
 188         /* if we had any open SMB connections when we exited then we
 189            need to tell the parent smbd so that it can trigger a retry
 190            of any locks we may have been holding or open files we were
 191            blocking */
 192         if (had_open_conn) {
 193                 exit(1);
 194         } else {
 195                 exit(0);
 196         }
 197 }
 198
 199 void exit_server(const char *const explanation)
 200 {
 201         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 202 }
 203
 204 void exit_server_cleanly(const char *const explanation)
 205 {
 206         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 207 }