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         if (sconn->using_smb2) {
  34                 /* SMB2 */
  35                 struct smbd_smb2_session *sess;
  36                 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) {
  37                         struct smbd_smb2_tcon *ptcon;
  38
  39                         for (ptcon = sess->tcons.list; ptcon; ptcon = ptcon->next) {
  40                                 connection_struct *conn = ptcon->compat_conn;
  41                                 /* Update if connection wasn't idle. */
  42                                 if (conn && conn->lastused != conn->lastused_count) {
  43                                         conn->lastused = t;
  44                                         conn->lastused_count = t;
  45                                 }
  46                         }
  47                 }
  48         } else {
  49                 /* SMB1 */
  50                 connection_struct *conn;
  51                 for (conn=sconn->smb1.tcons.Connections;conn;conn=conn->next) {
  52                         /* Update if connection wasn't idle. */
  53                         if (conn->lastused != conn->lastused_count) {
  54                                 conn->lastused = t;
  55                                 conn->lastused_count = t;
  56                         }
  57                 }
  58         }
  59 }
  60
  61 /****************************************************************************
  62  Idle inactive connections.
  63 ****************************************************************************/
  64
  65 bool conn_idle_all(struct smbd_server_connection *sconn, time_t t)
  66 {
  67         int deadtime = lp_deadtime()*60;
  68
  69         conn_lastused_update(sconn, t);
  70
  71         if (deadtime <= 0) {
  72                 deadtime = DEFAULT_SMBD_TIMEOUT;
  73         }
  74
  75         if (sconn->using_smb2) {
  76                 /* SMB2 */
  77                 struct smbd_smb2_session *sess;
  78                 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) {
  79                         struct smbd_smb2_tcon *ptcon;
  80
  81                         for (ptcon = sess->tcons.list; ptcon; ptcon = ptcon->next) {
  82                                 time_t age;
  83                                 connection_struct *conn = ptcon->compat_conn;
  84
  85                                 if (conn == NULL) {
  86                                         continue;
  87                                 }
  88
  89                                 age = t - conn->lastused;
  90                                 /* close dirptrs on connections that are idle */
  91                                 if (age > DPTR_IDLE_TIMEOUT) {
  92                                         dptr_idlecnum(conn);
  93                                 }
  94
  95                                 if (conn->num_files_open > 0 || age < deadtime) {
  96                                         return false;
  97                                 }
  98                         }
  99                 }
 100         } else {
 101                 /* SMB1 */
 102                 connection_struct *conn;
 103                 for (conn=sconn->smb1.tcons.Connections;conn;conn=conn->next) {
 104                         time_t age = t - conn->lastused;
 105
 106                         /* close dirptrs on connections that are idle */
 107                         if (age > DPTR_IDLE_TIMEOUT) {
 108                                 dptr_idlecnum(conn);
 109                         }
 110
 111                         if (conn->num_files_open > 0 || age < deadtime) {
 112                                 return false;
 113                         }
 114                 }
 115         }
 116
 117         /*
 118          * Check all pipes for any open handles. We cannot
 119          * idle with a handle open.
 120          */
 121         if (check_open_pipes()) {
 122                 return false;
 123         }
 124
 125         return true;
 126 }
 127
 128 /****************************************************************************
 129  Close all conn structures.
 130  Return true if any were closed.
 131 ****************************************************************************/
 132
 133 bool conn_close_all(struct smbd_server_connection *sconn)
 134 {
 135         bool ret = false;
 136         if (sconn->using_smb2) {
 137                 /* SMB2 */
 138                 struct smbd_smb2_session *sess;
 139                 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) {
 140                         struct smbd_smb2_tcon *tcon, *tc_next;
 141
 142                         for (tcon = sess->tcons.list; tcon; tcon = tc_next) {
 143                                 tc_next = tcon->next;
 144                                 TALLOC_FREE(tcon);
 145                                 ret = true;
 146                         }
 147                 }
 148         } else {
 149                 /* SMB1 */
 150                 connection_struct *conn, *next;
 151
 152                 for (conn=sconn->smb1.tcons.Connections;conn;conn=next) {
 153                         next=conn->next;
 154                         set_current_service(conn, 0, True);
 155                         close_cnum(conn, conn->vuid);
 156                         ret = true;
 157                 }
 158         }
 159         return ret;
 160 }
 161
 162
 163 /****************************************************************************
 164  Forcibly unmount a share.
 165  All instances of the parameter 'sharename' share are unmounted.
 166  The special sharename '*' forces unmount of all shares.
 167 ****************************************************************************/
 168
 169 void conn_force_tdis(struct smbd_server_connection *sconn, const char *sharename)
 170 {
 171         connection_struct *conn, *next;
 172
 173         if (strcmp(sharename, "*") == 0) {
 174                 DEBUG(1,("Forcing close of all shares\n"));
 175                 conn_close_all(sconn);
 176                 return;
 177         }
 178
 179         if (sconn->using_smb2) {
 180                 /* SMB2 */
 181                 struct smbd_smb2_session *sess;
 182                 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) {
 183                         struct smbd_smb2_tcon *tcon, *tc_next;
 184
 185                         for (tcon = sess->tcons.list; tcon; tcon = tc_next) {
 186                                 tc_next = tcon->next;
 187                                 if (tcon->compat_conn &&
 188                                                 strequal(lp_servicename(SNUM(tcon->compat_conn)),
 189                                                                 sharename)) {
 190                                         DEBUG(1,("Forcing close of share %s cnum=%d\n",
 191                                                 sharename, tcon->compat_conn->cnum));
 192                                         TALLOC_FREE(tcon);
 193                                 }
 194                         }
 195                 }
 196         } else {
 197                 /* SMB1 */
 198                 for (conn=sconn->smb1.tcons.Connections;conn;conn=next) {
 199                         next=conn->next;
 200                         if (strequal(lp_servicename(SNUM(conn)), sharename)) {
 201                                 DEBUG(1,("Forcing close of share %s cnum=%d\n",
 202                                         sharename, conn->cnum));
 203                                 close_cnum(conn, (uint16)-1);
 204                         }
 205                 }
 206         }
 207 }