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  * @brief Purge stale printers and reload from pre-populated pcap cache.
  36  *
  37  * This function should normally only be called as a callback on a successful
  38  * pcap_cache_reload() or after a MSG_PRINTER_CAP message is received.
  39  *
  40  * This function can cause DELETION of printers and drivers from our registry,
  41  * so calling it on a failed pcap reload may REMOVE permanently all printers
  42  * and drivers.
  43  *
  44  * @param[in] ev        The event context.
  45  *
  46  * @param[in] msg_ctx   The messaging context.
  47  */
  48 void delete_and_reload_printers(struct tevent_context *ev,
  49                                 struct messaging_context *msg_ctx)
  50 {
  51         struct auth_session_info *session_info = NULL;
  52         struct spoolss_PrinterInfo2 *pinfo2 = NULL;
  53         int n_services;
  54         int pnum;
  55         int snum;
  56         const char *pname;
  57         const char *sname;
  58         NTSTATUS status;
  59
  60         /* Get pcap printers updated */
  61         load_printers(ev, msg_ctx);
  62
  63         n_services = lp_numservices();
  64         pnum = lp_servicenumber(PRINTERS_NAME);
  65
  66         DEBUG(10, ("reloading printer services from pcap cache\n"));
  67
  68         status = make_session_info_system(talloc_tos(), &session_info);
  69         if (!NT_STATUS_IS_OK(status)) {
  70                 DEBUG(3, ("reload_printers: "
  71                           "Could not create system session_info\n"));
  72                 /* can't remove stale printers before we
  73                  * are fully initilized */
  74                 return;
  75         }
  76
  77         /*
  78          * Add default config for printers added to smb.conf file and remove
  79          * stale printers
  80          */
  81         for (snum = 0; snum < n_services; snum++) {
  82                 /* avoid removing PRINTERS_NAME */
  83                 if (snum == pnum) {
  84                         continue;
  85                 }
  86
  87                 /* skip no-printer services */
  88                 if (!(lp_snum_ok(snum) && lp_print_ok(snum))) {
  89                         continue;
  90                 }
  91
  92                 sname = lp_const_servicename(snum);
  93                 pname = lp_printername(snum);
  94
  95                 /* check printer, but avoid removing non-autoloaded printers */
  96                 if (!pcap_printername_ok(pname) && lp_autoloaded(snum)) {
  97                         DEBUG(3, ("removing stale printer %s\n", pname));
  98
  99                         if (is_printer_published(session_info, session_info,
 100                                                  msg_ctx,
 101                                                  NULL, lp_servicename(snum),
 102                                                  NULL, &pinfo2)) {
 103                                 nt_printer_publish(session_info,
 104                                                    session_info,
 105                                                    msg_ctx,
 106                                                    pinfo2,
 107                                                    DSPRINT_UNPUBLISH);
 108                                 TALLOC_FREE(pinfo2);
 109                         }
 110                         nt_printer_remove(session_info, session_info, msg_ctx,
 111                                           pname);
 112                         lp_killservice(snum);
 113                 } else {
 114                         DEBUG(8, ("Adding default registry entry for printer "
 115                                   "[%s], if it doesn't exist.\n", sname));
 116                         nt_printer_add(session_info, session_info, msg_ctx,
 117                                        sname);
 118                 }
 119         }
 120
 121         /* Make sure deleted printers are gone */
 122         load_printers(ev, msg_ctx);
 123
 124         TALLOC_FREE(session_info);
 125 }
 126
 127 /****************************************************************************
 128  Reload the services file.
 129 **************************************************************************/
 130
 131 bool reload_services(struct smbd_server_connection *sconn,
 132                      bool (*snumused) (struct smbd_server_connection *, int),
 133                      bool test)
 134 {
 135         bool ret;
 136
 137         if (lp_loaded()) {
 138                 char *fname = lp_configfile();
 139                 if (file_exist(fname) &&
 140                     !strcsequal(fname, get_dyn_CONFIGFILE())) {
 141                         set_dyn_CONFIGFILE(fname);
 142                         test = False;
 143                 }
 144         }
 145
 146         reopen_logs();
 147
 148         if (test && !lp_file_list_changed())
 149                 return(True);
 150
 151         lp_killunused(sconn, snumused);
 152
 153         ret = lp_load(get_dyn_CONFIGFILE(), False, False, True, True);
 154
 155         /* perhaps the config filename is now set */
 156         if (!test) {
 157                 reload_services(sconn, snumused, true);
 158         }
 159
 160         reopen_logs();
 161
 162         load_interfaces();
 163
 164         if (sconn != NULL) {
 165                 set_socket_options(sconn->sock, "SO_KEEPALIVE");
 166                 set_socket_options(sconn->sock, lp_socket_options());
 167         }
 168
 169         mangle_reset_cache();
 170         reset_stat_cache();
 171
 172         /* this forces service parameters to be flushed */
 173         set_current_service(NULL,0,True);
 174
 175         return(ret);
 176 }