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 snum;
  54         int n_services = lp_numservices();
  55         int pnum = lp_servicenumber(PRINTERS_NAME);
  56         const char *pname;
  57         NTSTATUS status;
  58         bool skip = false;
  59
  60         SMB_ASSERT(pcap_cache_loaded());
  61         DEBUG(10, ("reloading printer services from pcap cache\n"));
  62
  63         status = make_session_info_system(talloc_tos(), &session_info);
  64         if (!NT_STATUS_IS_OK(status)) {
  65                 DEBUG(3, ("reload_printers: "
  66                           "Could not create system session_info\n"));
  67                 /* can't remove stale printers before we
  68                  * are fully initilized */
  69                 skip = true;
  70         }
  71
  72         /* remove stale printers */
  73         for (snum = 0; skip == false && snum < n_services; snum++) {
  74                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
  75                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
  76                                       lp_autoloaded(snum)))
  77                         continue;
  78
  79                 pname = lp_printername(snum);
  80                 if (!pcap_printername_ok(pname)) {
  81                         DEBUG(3, ("removing stale printer %s\n", pname));
  82
  83                         if (is_printer_published(session_info, session_info,
  84                                                  msg_ctx,
  85                                                  NULL, lp_servicename(snum),
  86                                                  NULL, &pinfo2)) {
  87                                 nt_printer_publish(session_info,
  88                                                    session_info,
  89                                                    msg_ctx,
  90                                                    pinfo2,
  91                                                    DSPRINT_UNPUBLISH);
  92                                 TALLOC_FREE(pinfo2);
  93                         }
  94                         nt_printer_remove(session_info, session_info, msg_ctx,
  95                                           pname);
  96                         lp_killservice(snum);
  97                 }
  98         }
  99
 100         load_printers(ev, msg_ctx);
 101
 102         TALLOC_FREE(session_info);
 103 }
 104
 105 /****************************************************************************
 106  Reload the services file.
 107 **************************************************************************/
 108
 109 bool reload_services(struct smbd_server_connection *sconn,
 110                      bool (*snumused) (struct smbd_server_connection *, int),
 111                      bool test)
 112 {
 113         bool ret;
 114
 115         if (lp_loaded()) {
 116                 char *fname = lp_configfile();
 117                 if (file_exist(fname) &&
 118                     !strcsequal(fname, get_dyn_CONFIGFILE())) {
 119                         set_dyn_CONFIGFILE(fname);
 120                         test = False;
 121                 }
 122         }
 123
 124         reopen_logs();
 125
 126         if (test && !lp_file_list_changed())
 127                 return(True);
 128
 129         lp_killunused(sconn, snumused);
 130
 131         ret = lp_load(get_dyn_CONFIGFILE(), False, False, True, True);
 132
 133         /* perhaps the config filename is now set */
 134         if (!test) {
 135                 reload_services(sconn, snumused, true);
 136         }
 137
 138         reopen_logs();
 139
 140         load_interfaces();
 141
 142         if (sconn != NULL) {
 143                 set_socket_options(sconn->sock, "SO_KEEPALIVE");
 144                 set_socket_options(sconn->sock, lp_socket_options());
 145         }
 146
 147         mangle_reset_cache();
 148         reset_stat_cache();
 149
 150         /* this forces service parameters to be flushed */
 151         set_current_service(NULL,0,True);
 152
 153         return(ret);
 154 }