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  Close all conn structures.
  85  Return true if any were closed.
  86 ****************************************************************************/
  87
  88 bool conn_close_all(struct smbd_server_connection *sconn)
  89 {
  90         bool ret = false;
  91         if (sconn->using_smb2) {
  92                 /* SMB2 */
  93                 struct smbd_smb2_session *sess;
  94                 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) {
  95                         struct smbd_smb2_tcon *tcon, *tc_next;
  96
  97                         for (tcon = sess->tcons.list; tcon; tcon = tc_next) {
  98                                 tc_next = tcon->next;
  99                                 TALLOC_FREE(tcon);
 100                                 ret = true;
 101                         }
 102                 }
 103         } else {
 104                 /* SMB1 */
 105                 connection_struct *conn, *next;
 106
 107                 for (conn=sconn->connections;conn;conn=next) {
 108                         next=conn->next;
 109                         set_current_service(conn, 0, True);
 110                         close_cnum(conn, conn->vuid);
 111                         ret = true;
 112                 }
 113         }
 114         return ret;
 115 }
 116
 117
 118 /****************************************************************************
 119  Forcibly unmount a share.
 120  All instances of the parameter 'sharename' share are unmounted.
 121  The special sharename '*' forces unmount of all shares.
 122 ****************************************************************************/
 123
 124 void conn_force_tdis(struct smbd_server_connection *sconn, const char *sharename)
 125 {
 126         connection_struct *conn, *next;
 127
 128         if (strcmp(sharename, "*") == 0) {
 129                 DEBUG(1,("Forcing close of all shares\n"));
 130                 conn_close_all(sconn);
 131                 return;
 132         }
 133
 134         if (sconn->using_smb2) {
 135                 /* SMB2 */
 136                 struct smbd_smb2_session *sess;
 137                 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) {
 138                         struct smbd_smb2_tcon *tcon, *tc_next;
 139
 140                         for (tcon = sess->tcons.list; tcon; tcon = tc_next) {
 141                                 tc_next = tcon->next;
 142                                 if (tcon->compat_conn &&
 143                                                 strequal(lp_servicename(SNUM(tcon->compat_conn)),
 144                                                                 sharename)) {
 145                                         DEBUG(1,("Forcing close of share %s cnum=%d\n",
 146                                                 sharename, tcon->compat_conn->cnum));
 147                                         TALLOC_FREE(tcon);
 148                                 }
 149                         }
 150                 }
 151         } else {
 152                 /* SMB1 */
 153                 for (conn=sconn->connections;conn;conn=next) {
 154                         next=conn->next;
 155                         if (strequal(lp_servicename(SNUM(conn)), sharename)) {
 156                                 DEBUG(1,("Forcing close of share %s cnum=%d\n",
 157                                         sharename, conn->cnum));
 158                                 close_cnum(conn, (uint16)-1);
 159                         }
 160                 }
 161         }
 162 }