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 && sconn->smb1.negprot.auth_context) {
 103                 TALLOC_FREE(sconn->smb1.negprot.auth_context);
 104         }
 105
 106         if (sconn) {
 107                 NTSTATUS status;
 108
 109                 if (lp_log_writeable_files_on_exit()) {
 110                         bool found = false;
 111                         files_forall(sconn, log_writeable_file_fn, &found);
 112                 }
 113
 114                 /*
 115                  * Note: this is a no-op for smb2 as
 116                  * conn->tcon_table is empty
 117                  */
 118                 status = smb1srv_tcon_disconnect_all(conn);
 119                 if (!NT_STATUS_IS_OK(status)) {
 120                         DEBUG(0,("Server exit (%s)\n",
 121                                 (reason ? reason : "normal exit")));
 122                         DEBUG(0, ("exit_server_common: "
 123                                   "smb1srv_tcon_disconnect_all() failed (%s) - "
 124                                   "triggering cleanup\n", nt_errstr(status)));
 125                         how = SERVER_EXIT_ABNORMAL;
 126                         reason = "smb1srv_tcon_disconnect_all failed";
 127                 }
 128
 129                 status = smbXsrv_session_logoff_all(conn);
 130                 if (!NT_STATUS_IS_OK(status)) {
 131                         DEBUG(0,("Server exit (%s)\n",
 132                                 (reason ? reason : "normal exit")));
 133                         DEBUG(0, ("exit_server_common: "
 134                                   "smbXsrv_session_logoff_all() failed (%s) - "
 135                                   "triggering cleanup\n", nt_errstr(status)));
 136                         how = SERVER_EXIT_ABNORMAL;
 137                         reason = "smbXsrv_session_logoff_all failed";
 138                 }
 139
 140                 change_to_root_user();
 141         }
 142
 143         /* 3 second timeout. */
 144         print_notify_send_messages(msg_ctx, 3);
 145
 146         /* delete our entry in the serverid database. */
 147         if (am_parent) {
 148                 /*
 149                  * For children the parent takes care of cleaning up
 150                  */
 151                 serverid_deregister(messaging_server_id(msg_ctx));
 152         }
 153
 154 #ifdef WITH_DFS
 155         if (dcelogin_atmost_once) {
 156                 dfs_unlogin();
 157         }
 158 #endif
 159
 160 #ifdef USE_DMAPI
 161         /* Destroy Samba DMAPI session only if we are master smbd process */
 162         if (am_parent) {
 163                 if (!dmapi_destroy_session()) {
 164                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 165                 }
 166         }
 167 #endif
 168
 169         if (am_parent) {
 170                 rpc_wkssvc_shutdown();
 171                 rpc_dssetup_shutdown();
 172 #ifdef DEVELOPER
 173                 rpc_rpcecho_shutdown();
 174 #endif
 175                 rpc_netdfs_shutdown();
 176                 rpc_initshutdown_shutdown();
 177                 rpc_eventlog_shutdown();
 178                 rpc_ntsvcs_shutdown();
 179                 rpc_svcctl_shutdown();
 180                 rpc_spoolss_shutdown();
 181
 182                 rpc_srvsvc_shutdown();
 183                 rpc_winreg_shutdown();
 184
 185                 rpc_netlogon_shutdown();
 186                 rpc_samr_shutdown();
 187                 rpc_lsarpc_shutdown();
 188         }
 189
 190         /*
 191          * we need to force the order of freeing the following,
 192          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 193          */
 194         sconn = NULL;
 195         conn = NULL;
 196         TALLOC_FREE(global_smbXsrv_connection);
 197         server_messaging_context_free();
 198         server_event_context_free();
 199         TALLOC_FREE(smbd_memcache_ctx);
 200
 201         locking_end();
 202         printing_end();
 203
 204         if (how != SERVER_EXIT_NORMAL) {
 205                 DEBUGSEP(0);
 206                 DEBUG(0,("Abnormal server exit: %s\n",
 207                         reason ? reason : "no explanation provided"));
 208                 DEBUGSEP(0);
 209
 210                 log_stack_trace();
 211
 212                 dump_core();
 213
 214                 /* Notreached. */
 215                 exit(1);
 216         } else {
 217                 DEBUG(3,("Server exit (%s)\n",
 218                         (reason ? reason : "normal exit")));
 219                 if (am_parent) {
 220                         pidfile_unlink(lp_piddir(), "smbd");
 221                 }
 222                 gencache_stabilize();
 223         }
 224
 225         exit(0);
 226 }
 227
 228 void exit_server(const char *const explanation)
 229 {
 230         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 231 }
 232
 233 void exit_server_cleanly(const char *const explanation)
 234 {
 235         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 236 }