2 Unix SMB/CIFS implementation.
3 connection claim routines
4 Copyright (C) Andrew Tridgell 1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "smbd/smbd.h"
22 #include "smbd/globals.h"
23 #include "dbwrap/dbwrap.h"
25 #include "../lib/tsocket/tsocket.h"
27 #include "lib/conn_tdb.h"
29 /****************************************************************************
30 Delete a connection record.
31 ****************************************************************************/
33 bool yield_connection(connection_struct
*conn
, const char *name
)
35 struct db_record
*rec
;
38 DEBUG(3,("Yielding connection to %s\n",name
));
40 rec
= connections_fetch_entry(talloc_tos(), conn
, name
);
42 DEBUG(0, ("connections_fetch_entry failed\n"));
46 status
= dbwrap_record_delete(rec
);
47 if (!NT_STATUS_IS_OK(status
)) {
48 DEBUG( NT_STATUS_EQUAL(status
, NT_STATUS_NOT_FOUND
) ? 3 : 0,
49 ("deleting connection record returned %s\n",
54 return NT_STATUS_IS_OK(status
);
63 /****************************************************************************
64 Count the entries belonging to a service in the connection db.
65 ****************************************************************************/
67 static int count_fn(const struct connections_key
*ckey
,
68 const struct connections_data
*crec
,
71 struct count_stat
*cs
= (struct count_stat
*)udp
;
73 if (crec
->cnum
== TID_FIELD_INVALID
) {
77 if (cs
->verify
&& !process_exists(crec
->pid
)) {
81 if (strequal(crec
->servicename
, cs
->name
)) {
82 cs
->curr_connections
++;
88 /****************************************************************************
89 Claim an entry in the connections database.
90 ****************************************************************************/
92 int count_current_connections(const char *sharename
, bool verify
)
97 cs
.curr_connections
= 0;
102 * This has a race condition, but locking the chain before hand is worse
103 * as it leads to deadlock.
107 * become_root() because we might have to open connections.tdb
108 * via ctdb, which is not possible without root.
111 ret
= connections_forall_read(count_fn
, &cs
);
115 DEBUG(0,("count_current_connections: traverse of "
116 "connections.tdb failed\n"));
120 return cs
.curr_connections
;
123 bool connections_snum_used(struct smbd_server_connection
*unused
, int snum
)
127 active
= count_current_connections(lp_servicename(talloc_tos(), snum
),
136 /****************************************************************************
137 Claim an entry in the connections database.
138 ****************************************************************************/
140 bool claim_connection(connection_struct
*conn
, const char *name
)
142 struct db_record
*rec
;
143 struct connections_data crec
;
148 DEBUG(5,("claiming [%s]\n", name
));
150 if (!(rec
= connections_fetch_entry(talloc_tos(), conn
, name
))) {
151 DEBUG(0, ("connections_fetch_entry failed\n"));
155 /* Make clear that we require the optional unix_token in the source3 code */
156 SMB_ASSERT(conn
->session_info
->unix_token
);
158 /* fill in the crec */
160 crec
.magic
= 0x280267;
161 crec
.pid
= messaging_server_id(conn
->sconn
->msg_ctx
);
162 crec
.cnum
= conn
->cnum
;
163 crec
.uid
= conn
->session_info
->unix_token
->uid
;
164 crec
.gid
= conn
->session_info
->unix_token
->gid
;
165 strlcpy(crec
.servicename
, lp_servicename(rec
, SNUM(conn
)),
166 sizeof(crec
.servicename
));
167 crec
.start
= time(NULL
);
169 raddr
= tsocket_address_inet_addr_string(conn
->sconn
->remote_address
,
175 strlcpy(crec
.machine
,get_remote_machine_name(),sizeof(crec
.machine
));
176 strlcpy(crec
.addr
, raddr
, sizeof(crec
.addr
));
178 dbuf
.dptr
= (uint8
*)&crec
;
179 dbuf
.dsize
= sizeof(crec
);
181 status
= dbwrap_record_store(rec
, dbuf
, TDB_REPLACE
);
185 if (!NT_STATUS_IS_OK(status
)) {
186 DEBUG(0,("claim_connection: tdb_store failed with error %s.\n",