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