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
  47 static struct files_struct *log_writeable_file_fn(
  48         struct files_struct *fsp, void *private_data)
  49 {
  50         bool *found = (bool *)private_data;
  51         char *path;
  52
  53         if (!fsp->can_write) {
  54                 return NULL;
  55         }
  56         if (!(*found)) {
  57                 DEBUG(0, ("Writable files open at exit:\n"));
  58                 *found = true;
  59         }
  60
  61         path = talloc_asprintf(talloc_tos(), "%s/%s", fsp->conn->connectpath,
  62                                smb_fname_str_dbg(fsp->fsp_name));
  63         if (path == NULL) {
  64                 DEBUGADD(0, ("<NOMEM>\n"));
  65         }
  66
  67         DEBUGADD(0, ("%s\n", path));
  68
  69         TALLOC_FREE(path);
  70         return NULL;
  71 }
  72
  73 /****************************************************************************
  74  Exit the server.
  75 ****************************************************************************/
  76
  77 /* Reasons for shutting down a server process. */
  78 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
  79
  80 static void exit_server_common(enum server_exit_reason how,
  81         const char *const reason) _NORETURN_;
  82
  83 static void exit_server_common(enum server_exit_reason how,
  84         const char *const reason)
  85 {
  86         bool had_open_conn = false;
  87         struct smbd_server_connection *sconn = smbd_server_conn;
  88
  89         if (!exit_firsttime)
  90                 exit(0);
  91         exit_firsttime = false;
  92
  93         change_to_root_user();
  94
  95         if (sconn && sconn->smb1.negprot.auth_context) {
  96                 TALLOC_FREE(sconn->smb1.negprot.auth_context);
  97         }
  98
  99         if (sconn) {
 100                 if (lp_log_writeable_files_on_exit()) {
 101                         bool found = false;
 102                         files_forall(sconn, log_writeable_file_fn, &found);
 103                 }
 104                 had_open_conn = conn_close_all(sconn);
 105                 invalidate_all_vuids(sconn);
 106         }
 107
 108         /* 3 second timeout. */
 109         print_notify_send_messages(sconn->msg_ctx, 3);
 110
 111         /* delete our entry in the serverid database. */
 112         if (am_parent) {
 113                 /*
 114                  * For children the parent takes care of cleaning up
 115                  */
 116                 serverid_deregister(sconn_server_id(sconn));
 117         }
 118
 119 #ifdef WITH_DFS
 120         if (dcelogin_atmost_once) {
 121                 dfs_unlogin();
 122         }
 123 #endif
 124
 125 #ifdef USE_DMAPI
 126         /* Destroy Samba DMAPI session only if we are master smbd process */
 127         if (am_parent) {
 128                 if (!dmapi_destroy_session()) {
 129                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 130                 }
 131         }
 132 #endif
 133
 134         if (am_parent) {
 135                 rpc_wkssvc_shutdown();
 136                 rpc_dssetup_shutdown();
 137 #ifdef DEVELOPER
 138                 rpc_rpcecho_shutdown();
 139 #endif
 140                 rpc_netdfs_shutdown();
 141                 rpc_initshutdown_shutdown();
 142                 rpc_eventlog_shutdown();
 143                 rpc_ntsvcs_shutdown();
 144                 rpc_svcctl_shutdown();
 145                 rpc_spoolss_shutdown();
 146
 147                 rpc_srvsvc_shutdown();
 148                 rpc_winreg_shutdown();
 149
 150                 rpc_netlogon_shutdown();
 151                 rpc_samr_shutdown();
 152                 rpc_lsarpc_shutdown();
 153         }
 154
 155         /*
 156          * we need to force the order of freeing the following,
 157          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 158          */
 159         sconn = NULL;
 160         TALLOC_FREE(smbd_server_conn);
 161         server_messaging_context_free();
 162         server_event_context_free();
 163         TALLOC_FREE(smbd_memcache_ctx);
 164
 165         locking_end();
 166         printing_end();
 167
 168         if (how != SERVER_EXIT_NORMAL) {
 169                 DEBUGSEP(0);
 170                 DEBUG(0,("Abnormal server exit: %s\n",
 171                         reason ? reason : "no explanation provided"));
 172                 DEBUGSEP(0);
 173
 174                 log_stack_trace();
 175
 176                 dump_core();
 177
 178         } else {
 179                 DEBUG(3,("Server exit (%s)\n",
 180                         (reason ? reason : "normal exit")));
 181                 if (am_parent) {
 182                         pidfile_unlink();
 183                 }
 184                 gencache_stabilize();
 185         }
 186
 187         /* if we had any open SMB connections when we exited then we
 188            need to tell the parent smbd so that it can trigger a retry
 189            of any locks we may have been holding or open files we were
 190            blocking */
 191         if (had_open_conn) {
 192                 exit(1);
 193         } else {
 194                 exit(0);
 195         }
 196 }
 197
 198 void exit_server(const char *const explanation)
 199 {
 200         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 201 }
 202
 203 void exit_server_cleanly(const char *const explanation)
 204 {
 205         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 206 }
 207
 208 void exit_server_fault(void)
 209 {
 210         exit_server("critical server fault");
 211 }