source3/smbd/server_reload.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
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "smbd/smbd.h"
  26 #include "smbd/globals.h"
  27 #include "nt_printing.h"
  28 #include "printing/pcap.h"
  29 #include "printing/load.h"
  30 #include "auth.h"
  31 #include "messages.h"
  32 #include "lib/param/loadparm.h"
  33
  34 /****************************************************************************
  35  purge stale printers and reload from pre-populated pcap cache
  36 **************************************************************************/
  37 void reload_printers(struct tevent_context *ev,
  38                      struct messaging_context *msg_ctx)
  39 {
  40         struct auth_session_info *session_info = NULL;
  41         struct spoolss_PrinterInfo2 *pinfo2 = NULL;
  42         int snum;
  43         int n_services = lp_numservices();
  44         int pnum = lp_servicenumber(PRINTERS_NAME);
  45         const char *pname;
  46         NTSTATUS status;
  47         bool skip = false;
  48
  49         SMB_ASSERT(pcap_cache_loaded());
  50         DEBUG(10, ("reloading printer services from pcap cache\n"));
  51
  52         status = make_session_info_system(talloc_tos(), &session_info);
  53         if (!NT_STATUS_IS_OK(status)) {
  54                 DEBUG(3, ("reload_printers: "
  55                           "Could not create system session_info\n"));
  56                 /* can't remove stale printers before we
  57                  * are fully initilized */
  58                 skip = true;
  59         }
  60
  61         /* remove stale printers */
  62         for (snum = 0; skip == false && snum < n_services; snum++) {
  63                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
  64                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
  65                                       lp_autoloaded(snum)))
  66                         continue;
  67
  68                 pname = lp_printername(snum);
  69                 if (!pcap_printername_ok(pname)) {
  70                         DEBUG(3, ("removing stale printer %s\n", pname));
  71
  72                         if (is_printer_published(session_info, session_info,
  73                                                  msg_ctx,
  74                                                  NULL, lp_servicename(snum),
  75                                                  NULL, &pinfo2)) {
  76                                 nt_printer_publish(session_info,
  77                                                    session_info,
  78                                                    msg_ctx,
  79                                                    pinfo2,
  80                                                    DSPRINT_UNPUBLISH);
  81                                 TALLOC_FREE(pinfo2);
  82                         }
  83                         nt_printer_remove(session_info, session_info, msg_ctx,
  84                                           pname);
  85                         lp_killservice(snum);
  86                 }
  87         }
  88
  89         load_printers(ev, msg_ctx);
  90
  91         TALLOC_FREE(session_info);
  92 }
  93
  94 /****************************************************************************
  95  Reload the services file.
  96 **************************************************************************/
  97
  98 bool reload_services(struct messaging_context *msg_ctx, int smb_sock,
  99                      bool test)
 100 {
 101         bool ret;
 102
 103         if (lp_loaded()) {
 104                 char *fname = lp_configfile();
 105                 if (file_exist(fname) &&
 106                     !strcsequal(fname, get_dyn_CONFIGFILE())) {
 107                         set_dyn_CONFIGFILE(fname);
 108                         test = False;
 109                 }
 110         }
 111
 112         reopen_logs();
 113
 114         if (test && !lp_file_list_changed())
 115                 return(True);
 116
 117         if (msg_ctx) {
 118                 lp_killunused(msg_ctx_to_sconn(msg_ctx), conn_snum_used);
 119         } else {
 120                 lp_killunused(NULL, NULL);
 121         }
 122
 123         ret = lp_load(get_dyn_CONFIGFILE(), False, False, True, True);
 124
 125         /* perhaps the config filename is now set */
 126         if (!test)
 127                 reload_services(msg_ctx, smb_sock, True);
 128
 129         reopen_logs();
 130
 131         load_interfaces();
 132
 133         if (smb_sock != -1) {
 134                 set_socket_options(smb_sock,"SO_KEEPALIVE");
 135                 set_socket_options(smb_sock, lp_socket_options());
 136         }
 137
 138         mangle_reset_cache();
 139         reset_stat_cache();
 140
 141         /* this forces service parameters to be flushed */
 142         set_current_service(NULL,0,True);
 143
 144         return(ret);
 145 }
 146
 147 /****************************************************************************
 148  Notify smbds of new printcap data
 149 **************************************************************************/
 150 void reload_pcap_change_notify(struct tevent_context *ev,
 151                                struct messaging_context *msg_ctx)
 152 {
 153         message_send_all(msg_ctx, MSG_PRINTER_PCAP, NULL, 0, NULL);
 154 }