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 #include "smbprofile.h"
  49 #include "libcli/auth/netlogon_creds_cli.h"
  50
  51 static struct files_struct *log_writeable_file_fn(
  52         struct files_struct *fsp, void *private_data)
  53 {
  54         bool *found = (bool *)private_data;
  55         char *path;
  56
  57         if (!fsp->can_write) {
  58                 return NULL;
  59         }
  60         if (!(*found)) {
  61                 DEBUG(0, ("Writable files open at exit:\n"));
  62                 *found = true;
  63         }
  64
  65         path = talloc_asprintf(talloc_tos(), "%s/%s", fsp->conn->connectpath,
  66                                smb_fname_str_dbg(fsp->fsp_name));
  67         if (path == NULL) {
  68                 DEBUGADD(0, ("<NOMEM>\n"));
  69         }
  70
  71         DEBUGADD(0, ("%s\n", path));
  72
  73         TALLOC_FREE(path);
  74         return NULL;
  75 }
  76
  77 /****************************************************************************
  78  Exit the server.
  79 ****************************************************************************/
  80
  81 /* Reasons for shutting down a server process. */
  82 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
  83
  84 static void exit_server_common(enum server_exit_reason how,
  85         const char *reason) _NORETURN_;
  86
  87 static void exit_server_common(enum server_exit_reason how,
  88         const char *reason)
  89 {
  90         struct smbXsrv_client *client = global_smbXsrv_client;
  91         struct smbXsrv_connection *xconn = NULL;
  92         struct smbd_server_connection *sconn = NULL;
  93         struct messaging_context *msg_ctx = server_messaging_context();
  94
  95         if (client != NULL) {
  96                 sconn = client->sconn;
  97                 /*
  98                  * Here we typically have just one connection
  99                  */
 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         if (xconn != NULL) {
 110                 /*
 111                  * This is typically the disconnect for the only
 112                  * (or with multi-channel last) connection of the client
 113                  */
 114                 if (NT_STATUS_IS_OK(xconn->transport.status)) {
 115                         switch (how) {
 116                         case SERVER_EXIT_ABNORMAL:
 117                                 xconn->transport.status = NT_STATUS_INTERNAL_ERROR;
 118                                 break;
 119                         case SERVER_EXIT_NORMAL:
 120                                 xconn->transport.status = NT_STATUS_LOCAL_DISCONNECT;
 121                                 break;
 122                         }
 123                 }
 124
 125                 TALLOC_FREE(xconn->smb1.negprot.auth_context);
 126         }
 127
 128         change_to_root_user();
 129
 130         if (sconn != NULL) {
 131                 if (lp_log_writeable_files_on_exit()) {
 132                         bool found = false;
 133                         files_forall(sconn, log_writeable_file_fn, &found);
 134                 }
 135         }
 136
 137         change_to_root_user();
 138
 139         if (xconn != NULL) {
 140                 NTSTATUS status;
 141
 142                 /*
 143                  * Note: this is a no-op for smb2 as
 144                  * conn->tcon_table is empty
 145                  */
 146                 status = smb1srv_tcon_disconnect_all(xconn);
 147                 if (!NT_STATUS_IS_OK(status)) {
 148                         DEBUG(0,("Server exit (%s)\n",
 149                                 (reason ? reason : "normal exit")));
 150                         DEBUG(0, ("exit_server_common: "
 151                                   "smb1srv_tcon_disconnect_all() failed (%s) - "
 152                                   "triggering cleanup\n", nt_errstr(status)));
 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                 }
 163         }
 164
 165         change_to_root_user();
 166
 167         /* 3 second timeout. */
 168         print_notify_send_messages(msg_ctx, 3);
 169
 170 #ifdef USE_DMAPI
 171         /* Destroy Samba DMAPI session only if we are master smbd process */
 172         if (am_parent) {
 173                 if (!dmapi_destroy_session()) {
 174                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 175                 }
 176         }
 177 #endif
 178
 179         if (am_parent) {
 180                 rpc_wkssvc_shutdown();
 181                 rpc_dssetup_shutdown();
 182 #ifdef DEVELOPER
 183                 rpc_rpcecho_shutdown();
 184 #endif
 185                 rpc_netdfs_shutdown();
 186                 rpc_initshutdown_shutdown();
 187                 rpc_eventlog_shutdown();
 188                 rpc_ntsvcs_shutdown();
 189                 rpc_svcctl_shutdown();
 190                 rpc_spoolss_shutdown();
 191
 192                 rpc_srvsvc_shutdown();
 193                 rpc_winreg_shutdown();
 194
 195                 rpc_netlogon_shutdown();
 196                 rpc_samr_shutdown();
 197                 rpc_lsarpc_shutdown();
 198         }
 199
 200         /*
 201          * we need to force the order of freeing the following,
 202          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 203          */
 204         if (client != NULL) {
 205                 struct smbXsrv_connection *next;
 206
 207                 for (; xconn != NULL; xconn = next) {
 208                         next = xconn->next;
 209                         DLIST_REMOVE(client->connections, xconn);
 210                         talloc_free(xconn);
 211                         DO_PROFILE_INC(disconnect);
 212                 }
 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         server_messaging_context_free();
 222         server_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         am_parent = NULL;
 265         return reinit_after_fork(msg_ctx, ev_ctx, parent_longlived, comment);
 266 }