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/rpc/dcesrv_core.h"
  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 "../librpc/gen_ndr/srv_fsrvp.h"
  45 #include "../librpc/gen_ndr/srv_epmapper.h"
  46 #include "printing/notify.h"
  47 #include "printing.h"
  48 #include "serverid.h"
  49 #include "messages.h"
  50 #include "passdb.h"
  51 #include "../lib/util/pidfile.h"
  52 #include "smbprofile.h"
  53 #include "libcli/auth/netlogon_creds_cli.h"
  54 #include "lib/gencache.h"
  55 #include "rpc_server/rpc_config.h"
  56
  57 static struct files_struct *log_writeable_file_fn(
  58         struct files_struct *fsp, void *private_data)
  59 {
  60         bool *found = (bool *)private_data;
  61         char *path;
  62
  63         if (!fsp->can_write) {
  64                 return NULL;
  65         }
  66         if (!(*found)) {
  67                 DEBUG(0, ("Writable files open at exit:\n"));
  68                 *found = true;
  69         }
  70
  71         path = talloc_asprintf(talloc_tos(), "%s/%s", fsp->conn->connectpath,
  72                                smb_fname_str_dbg(fsp->fsp_name));
  73         if (path == NULL) {
  74                 DEBUGADD(0, ("<NOMEM>\n"));
  75         }
  76
  77         DEBUGADD(0, ("%s\n", path));
  78
  79         TALLOC_FREE(path);
  80         return NULL;
  81 }
  82
  83 /****************************************************************************
  84  Exit the server.
  85 ****************************************************************************/
  86
  87 /* Reasons for shutting down a server process. */
  88 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
  89
  90 static void exit_server_common(enum server_exit_reason how,
  91         const char *reason) _NORETURN_;
  92
  93 static void exit_server_common(enum server_exit_reason how,
  94         const char *reason)
  95 {
  96         struct smbXsrv_client *client = global_smbXsrv_client;
  97         struct smbXsrv_connection *xconn = NULL;
  98         struct smbd_server_connection *sconn = NULL;
  99         struct messaging_context *msg_ctx = global_messaging_context();
 100
 101         if (client != NULL) {
 102                 sconn = client->sconn;
 103                 xconn = client->connections;
 104         }
 105
 106         if (!exit_firsttime)
 107                 exit(0);
 108         exit_firsttime = false;
 109
 110         change_to_root_user();
 111
 112
 113         /*
 114          * Here we typically have just one connection
 115          */
 116         for (; xconn != NULL; xconn = xconn->next) {
 117                 /*
 118                  * This is typically the disconnect for the only
 119                  * (or with multi-channel last) connection of the client
 120                  */
 121                 if (NT_STATUS_IS_OK(xconn->transport.status)) {
 122                         switch (how) {
 123                         case SERVER_EXIT_ABNORMAL:
 124                                 xconn->transport.status = NT_STATUS_INTERNAL_ERROR;
 125                                 break;
 126                         case SERVER_EXIT_NORMAL:
 127                                 xconn->transport.status = NT_STATUS_LOCAL_DISCONNECT;
 128                                 break;
 129                         }
 130                 }
 131                 DO_PROFILE_INC(disconnect);
 132         }
 133
 134         change_to_root_user();
 135
 136         if (sconn != NULL) {
 137                 if (lp_log_writeable_files_on_exit()) {
 138                         bool found = false;
 139                         files_forall(sconn, log_writeable_file_fn, &found);
 140                 }
 141         }
 142
 143         change_to_root_user();
 144
 145         if (client != NULL) {
 146                 NTSTATUS status;
 147
 148                 /*
 149                  * Note: this is a no-op for smb2 as
 150                  * conn->tcon_table is empty
 151                  */
 152                 status = smb1srv_tcon_disconnect_all(client);
 153                 if (!NT_STATUS_IS_OK(status)) {
 154                         DEBUG(0,("Server exit (%s)\n",
 155                                 (reason ? reason : "normal exit")));
 156                         DEBUG(0, ("exit_server_common: "
 157                                   "smb1srv_tcon_disconnect_all() failed (%s) - "
 158                                   "triggering cleanup\n", nt_errstr(status)));
 159                 }
 160
 161                 status = smbXsrv_session_logoff_all(client);
 162                 if (!NT_STATUS_IS_OK(status)) {
 163                         DEBUG(0,("Server exit (%s)\n",
 164                                 (reason ? reason : "normal exit")));
 165                         DEBUG(0, ("exit_server_common: "
 166                                   "smbXsrv_session_logoff_all() failed (%s) - "
 167                                   "triggering cleanup\n", nt_errstr(status)));
 168                 }
 169         }
 170
 171         change_to_root_user();
 172
 173         if (client != NULL) {
 174                 struct smbXsrv_connection *xconn_next = NULL;
 175
 176                 for (xconn = client->connections;
 177                      xconn != NULL;
 178                      xconn = xconn_next) {
 179                         xconn_next = xconn->next;
 180                         DLIST_REMOVE(client->connections, xconn);
 181                         TALLOC_FREE(xconn);
 182                 }
 183         }
 184
 185         change_to_root_user();
 186
 187         /* 3 second timeout. */
 188         print_notify_send_messages(msg_ctx, 3);
 189
 190 #ifdef USE_DMAPI
 191         /* Destroy Samba DMAPI session only if we are master smbd process */
 192         if (am_parent) {
 193                 if (!dmapi_destroy_session()) {
 194                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 195                 }
 196         }
 197 #endif
 198
 199         if (am_parent && sconn != NULL) {
 200                 dcesrv_shutdown_registered_ep_servers(sconn->dce_ctx);
 201
 202                 rpc_wkssvc_shutdown();
 203                 rpc_dssetup_shutdown();
 204 #ifdef DEVELOPER
 205                 rpc_rpcecho_shutdown();
 206 #endif
 207                 rpc_netdfs_shutdown();
 208                 rpc_initshutdown_shutdown();
 209                 rpc_eventlog_shutdown();
 210                 rpc_ntsvcs_shutdown();
 211                 rpc_svcctl_shutdown();
 212                 rpc_spoolss_shutdown();
 213
 214                 rpc_srvsvc_shutdown();
 215                 rpc_winreg_shutdown();
 216
 217                 rpc_netlogon_shutdown();
 218                 rpc_samr_shutdown();
 219                 rpc_lsarpc_shutdown();
 220
 221                 rpc_FileServerVssAgent_shutdown();
 222
 223                 rpc_epmapper_shutdown();
 224
 225                 global_dcesrv_context_free();
 226         }
 227
 228         /*
 229          * we need to force the order of freeing the following,
 230          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 231          */
 232         if (client != NULL) {
 233                 TALLOC_FREE(client->sconn);
 234         }
 235         sconn = NULL;
 236         xconn = NULL;
 237         client = NULL;
 238         netlogon_creds_cli_close_global_db();
 239         TALLOC_FREE(global_smbXsrv_client);
 240         smbprofile_dump();
 241         global_messaging_context_free();
 242         global_event_context_free();
 243         TALLOC_FREE(smbd_memcache_ctx);
 244
 245         locking_end();
 246         printing_end();
 247
 248         if (how != SERVER_EXIT_NORMAL) {
 249
 250                 smb_panic(reason);
 251
 252                 /* Notreached. */
 253                 exit(1);
 254         } else {
 255                 DEBUG(3,("Server exit (%s)\n",
 256                         (reason ? reason : "normal exit")));
 257                 if (am_parent) {
 258                         pidfile_unlink(lp_pid_directory(), "smbd");
 259                 }
 260         }
 261
 262         exit(0);
 263 }
 264
 265 void smbd_exit_server(const char *const explanation)
 266 {
 267         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 268 }
 269
 270 void smbd_exit_server_cleanly(const char *const explanation)
 271 {
 272         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 273 }
 274
 275 /*
 276  * reinit_after_fork() wrapper that should be called when forking from
 277  * smbd.
 278  */
 279 NTSTATUS smbd_reinit_after_fork(struct messaging_context *msg_ctx,
 280                                 struct tevent_context *ev_ctx,
 281                                 bool parent_longlived, const char *comment)
 282 {
 283         NTSTATUS ret;
 284         am_parent = NULL;
 285         ret = reinit_after_fork(msg_ctx, ev_ctx, parent_longlived, comment);
 286         initialize_password_db(true, ev_ctx);
 287         return ret;
 288 }