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