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_client *client = global_smbXsrv_client;
  89         struct smbXsrv_connection *xconn = NULL;
  90         struct smbd_server_connection *sconn = NULL;
  91         struct messaging_context *msg_ctx = server_messaging_context();
  92
  93         if (client != NULL) {
  94                 sconn = client->sconn;
  95                 /*
  96                  * Here we typically have just one connection
  97                  */
  98                 xconn = client->connections;
  99         }
 100
 101         if (!exit_firsttime)
 102                 exit(0);
 103         exit_firsttime = false;
 104
 105         change_to_root_user();
 106
 107         if (xconn != NULL) {
 108                 /*
 109                  * This is typically the disconnect for the only
 110                  * (or with multi-channel last) connection of the client
 111                  */
 112                 if (NT_STATUS_IS_OK(xconn->transport.status)) {
 113                         switch (how) {
 114                         case SERVER_EXIT_ABNORMAL:
 115                                 xconn->transport.status = NT_STATUS_INTERNAL_ERROR;
 116                                 break;
 117                         case SERVER_EXIT_NORMAL:
 118                                 xconn->transport.status = NT_STATUS_LOCAL_DISCONNECT;
 119                                 break;
 120                         }
 121                 }
 122
 123                 TALLOC_FREE(xconn->smb1.negprot.auth_context);
 124         }
 125
 126         change_to_root_user();
 127
 128         if (sconn != NULL) {
 129                 if (lp_log_writeable_files_on_exit()) {
 130                         bool found = false;
 131                         files_forall(sconn, log_writeable_file_fn, &found);
 132                 }
 133         }
 134
 135         change_to_root_user();
 136
 137         if (xconn != NULL) {
 138                 NTSTATUS status;
 139
 140                 /*
 141                  * Note: this is a no-op for smb2 as
 142                  * conn->tcon_table is empty
 143                  */
 144                 status = smb1srv_tcon_disconnect_all(xconn);
 145                 if (!NT_STATUS_IS_OK(status)) {
 146                         DEBUG(0,("Server exit (%s)\n",
 147                                 (reason ? reason : "normal exit")));
 148                         DEBUG(0, ("exit_server_common: "
 149                                   "smb1srv_tcon_disconnect_all() failed (%s) - "
 150                                   "triggering cleanup\n", nt_errstr(status)));
 151                         how = SERVER_EXIT_ABNORMAL;
 152                         reason = "smb1srv_tcon_disconnect_all failed";
 153                 }
 154
 155                 status = smbXsrv_session_logoff_all(xconn);
 156                 if (!NT_STATUS_IS_OK(status)) {
 157                         DEBUG(0,("Server exit (%s)\n",
 158                                 (reason ? reason : "normal exit")));
 159                         DEBUG(0, ("exit_server_common: "
 160                                   "smbXsrv_session_logoff_all() failed (%s) - "
 161                                   "triggering cleanup\n", nt_errstr(status)));
 162                         how = SERVER_EXIT_ABNORMAL;
 163                         reason = "smbXsrv_session_logoff_all failed";
 164                 }
 165         }
 166
 167         change_to_root_user();
 168
 169         /* 3 second timeout. */
 170         print_notify_send_messages(msg_ctx, 3);
 171
 172         /* delete our entry in the serverid database. */
 173         if (am_parent) {
 174                 /*
 175                  * For children the parent takes care of cleaning up
 176                  */
 177                 serverid_deregister(messaging_server_id(msg_ctx));
 178         }
 179
 180 #ifdef WITH_DFS
 181         if (dcelogin_atmost_once) {
 182                 dfs_unlogin();
 183         }
 184 #endif
 185
 186 #ifdef USE_DMAPI
 187         /* Destroy Samba DMAPI session only if we are master smbd process */
 188         if (am_parent) {
 189                 if (!dmapi_destroy_session()) {
 190                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 191                 }
 192         }
 193 #endif
 194
 195         if (am_parent) {
 196                 rpc_wkssvc_shutdown();
 197                 rpc_dssetup_shutdown();
 198 #ifdef DEVELOPER
 199                 rpc_rpcecho_shutdown();
 200 #endif
 201                 rpc_netdfs_shutdown();
 202                 rpc_initshutdown_shutdown();
 203                 rpc_eventlog_shutdown();
 204                 rpc_ntsvcs_shutdown();
 205                 rpc_svcctl_shutdown();
 206                 rpc_spoolss_shutdown();
 207
 208                 rpc_srvsvc_shutdown();
 209                 rpc_winreg_shutdown();
 210
 211                 rpc_netlogon_shutdown();
 212                 rpc_samr_shutdown();
 213                 rpc_lsarpc_shutdown();
 214         }
 215
 216         /*
 217          * we need to force the order of freeing the following,
 218          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 219          */
 220         if (client != NULL) {
 221                 struct smbXsrv_connection *next;
 222
 223                 for (; xconn != NULL; xconn = next) {
 224                         next = xconn->next;
 225                         DLIST_REMOVE(client->connections, xconn);
 226                         talloc_free(xconn);
 227                         DO_PROFILE_INC(disconnect);
 228                 }
 229                 TALLOC_FREE(client->sconn);
 230         }
 231         sconn = NULL;
 232         xconn = NULL;
 233         client = NULL;
 234         TALLOC_FREE(global_smbXsrv_client);
 235         server_messaging_context_free();
 236         server_event_context_free();
 237         TALLOC_FREE(smbd_memcache_ctx);
 238
 239         locking_end();
 240         printing_end();
 241
 242         if (how != SERVER_EXIT_NORMAL) {
 243
 244                 smb_panic(reason);
 245
 246                 /* Notreached. */
 247                 exit(1);
 248         } else {
 249                 DEBUG(3,("Server exit (%s)\n",
 250                         (reason ? reason : "normal exit")));
 251                 if (am_parent) {
 252                         pidfile_unlink(lp_pid_directory(), "smbd");
 253                 }
 254                 gencache_stabilize();
 255         }
 256
 257         exit(0);
 258 }
 259
 260 void smbd_exit_server(const char *const explanation)
 261 {
 262         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 263 }
 264
 265 void smbd_exit_server_cleanly(const char *const explanation)
 266 {
 267         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 268 }