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