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 *const reason) _NORETURN_;
  83
  84 static void exit_server_common(enum server_exit_reason how,
  85         const char *const 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                 if (lp_log_writeable_files_on_exit()) {
 107                         bool found = false;
 108                         files_forall(sconn, log_writeable_file_fn, &found);
 109                 }
 110                 conn_close_all(sconn);
 111                 invalidate_all_vuids(sconn);
 112         }
 113
 114         /* 3 second timeout. */
 115         print_notify_send_messages(msg_ctx, 3);
 116
 117         /* delete our entry in the serverid database. */
 118         if (am_parent) {
 119                 /*
 120                  * For children the parent takes care of cleaning up
 121                  */
 122                 serverid_deregister(messaging_server_id(msg_ctx));
 123         }
 124
 125 #ifdef WITH_DFS
 126         if (dcelogin_atmost_once) {
 127                 dfs_unlogin();
 128         }
 129 #endif
 130
 131 #ifdef USE_DMAPI
 132         /* Destroy Samba DMAPI session only if we are master smbd process */
 133         if (am_parent) {
 134                 if (!dmapi_destroy_session()) {
 135                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 136                 }
 137         }
 138 #endif
 139
 140         if (am_parent) {
 141                 rpc_wkssvc_shutdown();
 142                 rpc_dssetup_shutdown();
 143 #ifdef DEVELOPER
 144                 rpc_rpcecho_shutdown();
 145 #endif
 146                 rpc_netdfs_shutdown();
 147                 rpc_initshutdown_shutdown();
 148                 rpc_eventlog_shutdown();
 149                 rpc_ntsvcs_shutdown();
 150                 rpc_svcctl_shutdown();
 151                 rpc_spoolss_shutdown();
 152
 153                 rpc_srvsvc_shutdown();
 154                 rpc_winreg_shutdown();
 155
 156                 rpc_netlogon_shutdown();
 157                 rpc_samr_shutdown();
 158                 rpc_lsarpc_shutdown();
 159         }
 160
 161         /*
 162          * we need to force the order of freeing the following,
 163          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 164          */
 165         sconn = NULL;
 166         conn = NULL;
 167         TALLOC_FREE(global_smbXsrv_connection);
 168         server_messaging_context_free();
 169         server_event_context_free();
 170         TALLOC_FREE(smbd_memcache_ctx);
 171
 172         locking_end();
 173         printing_end();
 174
 175         if (how != SERVER_EXIT_NORMAL) {
 176                 DEBUGSEP(0);
 177                 DEBUG(0,("Abnormal server exit: %s\n",
 178                         reason ? reason : "no explanation provided"));
 179                 DEBUGSEP(0);
 180
 181                 log_stack_trace();
 182
 183                 dump_core();
 184
 185                 /* Notreached. */
 186                 exit(1);
 187         } else {
 188                 DEBUG(3,("Server exit (%s)\n",
 189                         (reason ? reason : "normal exit")));
 190                 if (am_parent) {
 191                         pidfile_unlink();
 192                 }
 193                 gencache_stabilize();
 194         }
 195
 196         exit(0);
 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 }