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 smbd_server_connection *sconn = NULL;
  94         struct messaging_context *msg_ctx = server_messaging_context();
  95
  96         if (client != NULL) {
  97                 sconn = client->sconn;
  98                 /*
  99                  * Here we typically have just one connection
 100                  */
 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         if (xconn != NULL) {
 111                 /*
 112                  * This is typically the disconnect for the only
 113                  * (or with multi-channel last) connection of the client
 114                  */
 115                 if (NT_STATUS_IS_OK(xconn->transport.status)) {
 116                         switch (how) {
 117                         case SERVER_EXIT_ABNORMAL:
 118                                 xconn->transport.status = NT_STATUS_INTERNAL_ERROR;
 119                                 break;
 120                         case SERVER_EXIT_NORMAL:
 121                                 xconn->transport.status = NT_STATUS_LOCAL_DISCONNECT;
 122                                 break;
 123                         }
 124                 }
 125
 126                 TALLOC_FREE(xconn->smb1.negprot.auth_context);
 127         }
 128
 129         change_to_root_user();
 130
 131         if (sconn != NULL) {
 132                 if (lp_log_writeable_files_on_exit()) {
 133                         bool found = false;
 134                         files_forall(sconn, log_writeable_file_fn, &found);
 135                 }
 136         }
 137
 138         change_to_root_user();
 139
 140         if (xconn != NULL) {
 141                 NTSTATUS status;
 142
 143                 /*
 144                  * Note: this is a no-op for smb2 as
 145                  * conn->tcon_table is empty
 146                  */
 147                 status = smb1srv_tcon_disconnect_all(client);
 148                 if (!NT_STATUS_IS_OK(status)) {
 149                         DEBUG(0,("Server exit (%s)\n",
 150                                 (reason ? reason : "normal exit")));
 151                         DEBUG(0, ("exit_server_common: "
 152                                   "smb1srv_tcon_disconnect_all() failed (%s) - "
 153                                   "triggering cleanup\n", nt_errstr(status)));
 154                 }
 155
 156                 status = smbXsrv_session_logoff_all(xconn);
 157                 if (!NT_STATUS_IS_OK(status)) {
 158                         DEBUG(0,("Server exit (%s)\n",
 159                                 (reason ? reason : "normal exit")));
 160                         DEBUG(0, ("exit_server_common: "
 161                                   "smbXsrv_session_logoff_all() failed (%s) - "
 162                                   "triggering cleanup\n", nt_errstr(status)));
 163                 }
 164         }
 165
 166         change_to_root_user();
 167
 168         /* 3 second timeout. */
 169         print_notify_send_messages(msg_ctx, 3);
 170
 171 #ifdef USE_DMAPI
 172         /* Destroy Samba DMAPI session only if we are master smbd process */
 173         if (am_parent) {
 174                 if (!dmapi_destroy_session()) {
 175                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 176                 }
 177         }
 178 #endif
 179
 180         if (am_parent) {
 181                 rpc_wkssvc_shutdown();
 182                 rpc_dssetup_shutdown();
 183 #ifdef DEVELOPER
 184                 rpc_rpcecho_shutdown();
 185 #endif
 186                 rpc_netdfs_shutdown();
 187                 rpc_initshutdown_shutdown();
 188                 rpc_eventlog_shutdown();
 189                 rpc_ntsvcs_shutdown();
 190                 rpc_svcctl_shutdown();
 191                 rpc_spoolss_shutdown();
 192
 193                 rpc_srvsvc_shutdown();
 194                 rpc_winreg_shutdown();
 195
 196                 rpc_netlogon_shutdown();
 197                 rpc_samr_shutdown();
 198                 rpc_lsarpc_shutdown();
 199         }
 200
 201         /*
 202          * we need to force the order of freeing the following,
 203          * because smbd_msg_ctx is not a talloc child of smbd_server_conn.
 204          */
 205         if (client != NULL) {
 206                 struct smbXsrv_connection *next;
 207
 208                 for (; xconn != NULL; xconn = next) {
 209                         next = xconn->next;
 210                         DLIST_REMOVE(client->connections, xconn);
 211                         talloc_free(xconn);
 212                         DO_PROFILE_INC(disconnect);
 213                 }
 214                 TALLOC_FREE(client->sconn);
 215         }
 216         sconn = NULL;
 217         xconn = NULL;
 218         client = NULL;
 219         netlogon_creds_cli_close_global_db();
 220         TALLOC_FREE(global_smbXsrv_client);
 221         smbprofile_dump();
 222         server_messaging_context_free();
 223         server_event_context_free();
 224         TALLOC_FREE(smbd_memcache_ctx);
 225
 226         locking_end();
 227         printing_end();
 228
 229         if (how != SERVER_EXIT_NORMAL) {
 230
 231                 smb_panic(reason);
 232
 233                 /* Notreached. */
 234                 exit(1);
 235         } else {
 236                 DEBUG(3,("Server exit (%s)\n",
 237                         (reason ? reason : "normal exit")));
 238                 if (am_parent) {
 239                         pidfile_unlink(lp_pid_directory(), "smbd");
 240                 }
 241                 gencache_stabilize();
 242         }
 243
 244         exit(0);
 245 }
 246
 247 void smbd_exit_server(const char *const explanation)
 248 {
 249         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 250 }
 251
 252 void smbd_exit_server_cleanly(const char *const explanation)
 253 {
 254         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 255 }
 256
 257 /*
 258  * reinit_after_fork() wrapper that should be called when forking from
 259  * smbd.
 260  */
 261 NTSTATUS smbd_reinit_after_fork(struct messaging_context *msg_ctx,
 262                                 struct tevent_context *ev_ctx,
 263                                 bool parent_longlived, const char *comment)
 264 {
 265         NTSTATUS ret;
 266         am_parent = NULL;
 267         ret = reinit_after_fork(msg_ctx, ev_ctx, parent_longlived, comment);
 268         initialize_password_db(true, ev_ctx);
 269         return ret;
 270 }