source3/smbd/conn_idle.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Manage connections_struct structures
   4    Copyright (C) Andrew Tridgell 1998
   5    Copyright (C) Alexander Bokovoy 2002
   6    Copyright (C) Jeremy Allison 2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "smbd/smbd.h"
  24 #include "smbd/globals.h"
  25 #include "rpc_server/rpc_pipes.h"
  26
  27 /****************************************************************************
  28  Update last used timestamps.
  29 ****************************************************************************/
  30
  31 static void conn_lastused_update(struct smbd_server_connection *sconn,time_t t)
  32 {
  33         struct connection_struct *conn;
  34
  35         for (conn=sconn->connections; conn; conn=conn->next) {
  36                 /* Update if connection wasn't idle. */
  37                 if (conn->lastused != conn->lastused_count) {
  38                         conn->lastused = t;
  39                         conn->lastused_count = t;
  40                 }
  41         }
  42 }
  43
  44 /****************************************************************************
  45  Idle inactive connections.
  46 ****************************************************************************/
  47
  48 bool conn_idle_all(struct smbd_server_connection *sconn, time_t t)
  49 {
  50         int deadtime = lp_deadtime()*60;
  51         struct connection_struct *conn;
  52
  53         conn_lastused_update(sconn, t);
  54
  55         if (deadtime <= 0) {
  56                 deadtime = DEFAULT_SMBD_TIMEOUT;
  57         }
  58
  59         for (conn=sconn->connections;conn;conn=conn->next) {
  60                 time_t age = t - conn->lastused;
  61
  62                 /* close dirptrs on connections that are idle */
  63                 if (age > DPTR_IDLE_TIMEOUT) {
  64                         dptr_idlecnum(conn);
  65                 }
  66
  67                 if (conn->num_files_open > 0 || age < deadtime) {
  68                         return false;
  69                 }
  70         }
  71
  72         /*
  73          * Check all pipes for any open handles. We cannot
  74          * idle with a handle open.
  75          */
  76         if (check_open_pipes()) {
  77                 return false;
  78         }
  79
  80         return true;
  81 }
  82
  83 /****************************************************************************
  84  Forcibly unmount a share.
  85  All instances of the parameter 'sharename' share are unmounted.
  86  The special sharename '*' forces unmount of all shares.
  87 ****************************************************************************/
  88
  89 void conn_force_tdis(struct smbd_server_connection *sconn, const char *sharename)
  90 {
  91         connection_struct *conn, *next;
  92         bool close_all = false;
  93
  94         if (strcmp(sharename, "*") == 0) {
  95                 close_all = true;
  96                 DEBUG(1, ("conn_force_tdis: Forcing close of all shares\n"));
  97         }
  98
  99         /* SMB1 and SMB 2*/
 100         for (conn = sconn->connections; conn; conn = next) {
 101                 struct smbXsrv_tcon *tcon;
 102                 bool do_close = false;
 103                 NTSTATUS status;
 104                 uint64_t vuid = UID_FIELD_INVALID;
 105
 106                 next = conn->next;
 107
 108                 if (conn->tcon == NULL) {
 109                         continue;
 110                 }
 111                 tcon = conn->tcon;
 112
 113                 if (close_all) {
 114                         do_close = true;
 115                 } else if (strequal(lp_servicename(talloc_tos(), SNUM(conn)),
 116                                     sharename)) {
 117                         DEBUG(1, ("conn_force_tdis: Forcing close of "
 118                                   "share '%s' (wire_id=0x%08x)\n",
 119                                   tcon->global->share_name,
 120                                   tcon->global->tcon_wire_id));
 121                         do_close = true;
 122                 }
 123
 124                 if (!do_close) {
 125                         continue;
 126                 }
 127
 128                 if (sconn->using_smb2) {
 129                         vuid = conn->vuid;
 130                 }
 131
 132                 conn = NULL;
 133                 status = smbXsrv_tcon_disconnect(tcon, vuid);
 134                 if (!NT_STATUS_IS_OK(status)) {
 135                         DEBUG(0, ("conn_force_tdis: "
 136                                   "smbXsrv_tcon_disconnect() of share '%s' "
 137                                   "(wire_id=0x%08x) failed: %s\n",
 138                                   tcon->global->share_name,
 139                                   tcon->global->tcon_wire_id,
 140                                   nt_errstr(status)));
 141                 }
 142
 143                 TALLOC_FREE(tcon);
 144         }
 145
 146         change_to_root_user();
 147         reload_services(sconn, conn_snum_used, true);
 148 }