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/>.
22 /****************************************************************************
23 Delete a connection record.
24 ****************************************************************************/
26 BOOL yield_connection(connection_struct *conn, const char *name)
28 struct db_record *rec;
31 DEBUG(3,("Yielding connection to %s\n",name));
33 if (!(rec = connections_fetch_entry(NULL, conn, name))) {
34 DEBUG(0, ("connections_fetch_entry failed\n"));
38 status = rec->delete_rec(rec);
39 if (!NT_STATUS_IS_OK(status)) {
40 DEBUG( NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND) ? 3 : 0,
41 ("deleting connection record returned %s\n",
46 return NT_STATUS_IS_OK(status);
56 /****************************************************************************
57 Count the entries belonging to a service in the connection db.
58 ****************************************************************************/
60 static int count_fn(struct db_record *rec,
61 const struct connections_key *ckey,
62 const struct connections_data *crec,
65 struct count_stat *cs = (struct count_stat *)udp;
67 if (crec->cnum == -1) {
71 /* If the pid was not found delete the entry from connections.tdb */
73 if (cs->Clear && !process_exists(crec->pid) && (errno == ESRCH)) {
75 DEBUG(2,("pid %s doesn't exist - deleting connections %d [%s]\n",
76 procid_str_static(&crec->pid), crec->cnum,
79 status = rec->delete_rec(rec);
80 if (!NT_STATUS_IS_OK(status)) {
81 DEBUG(0,("count_fn: tdb_delete failed with error %s\n",
87 if (strequal(crec->servicename, cs->name))
88 cs->curr_connections++;
93 /****************************************************************************
94 Claim an entry in the connections database.
95 ****************************************************************************/
97 int count_current_connections( const char *sharename, BOOL clear )
101 cs.mypid = sys_getpid();
102 cs.curr_connections = 0;
107 * This has a race condition, but locking the chain before hand is worse
108 * as it leads to deadlock.
111 if (connections_forall(count_fn, &cs) == -1) {
112 DEBUG(0,("count_current_connections: traverse of "
113 "connections.tdb failed\n"));
117 return cs.curr_connections;
120 /****************************************************************************
121 Claim an entry in the connections database.
122 ****************************************************************************/
124 BOOL claim_connection(connection_struct *conn, const char *name,
127 struct db_record *rec;
128 struct connections_data crec;
132 DEBUG(5,("claiming [%s]\n", name));
134 if (!(rec = connections_fetch_entry(NULL, conn, name))) {
135 DEBUG(0, ("connections_fetch_entry failed\n"));
139 /* fill in the crec */
141 crec.magic = 0x280267;
142 crec.pid = procid_self();
143 crec.cnum = conn?conn->cnum:-1;
145 crec.uid = conn->uid;
146 crec.gid = conn->gid;
147 strlcpy(crec.servicename, lp_servicename(SNUM(conn)),
148 sizeof(crec.servicename));
150 crec.start = time(NULL);
151 crec.bcast_msg_flags = msg_flags;
153 strlcpy(crec.machine,get_remote_machine_name(),sizeof(crec.machine));
154 strlcpy(crec.addr,conn?conn->client_address:client_addr(),
157 dbuf.dptr = (uint8 *)&crec;
158 dbuf.dsize = sizeof(crec);
160 status = rec->store(rec, dbuf, TDB_REPLACE);
164 if (!NT_STATUS_IS_OK(status)) {
165 DEBUG(0,("claim_connection: tdb_store failed with error %s.\n",
173 BOOL register_message_flags(BOOL doreg, uint32 msg_flags)
175 struct db_record *rec;
176 struct connections_data *pcrec;
179 DEBUG(10,("register_message_flags: %s flags 0x%x\n",
180 doreg ? "adding" : "removing",
181 (unsigned int)msg_flags ));
183 if (!(rec = connections_fetch_entry(NULL, NULL, ""))) {
184 DEBUG(0, ("connections_fetch_entry failed\n"));
188 if (rec->value.dsize != sizeof(struct connections_data)) {
189 DEBUG(0,("register_message_flags: Got wrong record size\n"));
194 pcrec = (struct connections_data *)rec->value.dptr;
196 pcrec->bcast_msg_flags |= msg_flags;
198 pcrec->bcast_msg_flags &= ~msg_flags;
200 status = rec->store(rec, rec->value, TDB_REPLACE);
202 if (!NT_STATUS_IS_OK(status)) {
203 DEBUG(0,("register_message_flags: tdb_store failed: %s.\n",
209 DEBUG(10,("register_message_flags: new flags 0x%x\n",
210 (unsigned int)pcrec->bcast_msg_flags ));
217 /*********************************************************************
218 *********************************************************************/
220 static TDB_DATA* make_pipe_rec_key( struct pipe_open_rec *prec )
222 TDB_DATA *kbuf = NULL;
228 if ( (kbuf = TALLOC_P(prec, TDB_DATA)) == NULL ) {
232 snprintf( key_string, sizeof(key_string), "%s/%d/%d",
233 prec->name, procid_to_pid(&prec->pid), prec->pnum );
235 *kbuf = string_term_tdb_data(talloc_strdup(prec, key_string));
236 if (kbuf->dptr == NULL )
242 /*********************************************************************
243 *********************************************************************/
245 static void fill_pipe_open_rec( struct pipe_open_rec *prec, smb_np_struct *p )
247 prec->pid = pid_to_procid(sys_getpid());
248 prec->pnum = p->pnum;
249 prec->uid = geteuid();
250 fstrcpy( prec->name, p->name );
255 /*********************************************************************
256 *********************************************************************/
258 BOOL store_pipe_opendb( smb_np_struct *p )
260 struct db_record *dbrec;
261 struct pipe_open_rec *prec;
266 if ( (prec = TALLOC_P( NULL, struct pipe_open_rec)) == NULL ) {
267 DEBUG(0,("store_pipe_opendb: talloc failed!\n"));
271 fill_pipe_open_rec( prec, p );
272 if ( (key = make_pipe_rec_key( prec )) == NULL ) {
276 data.dptr = (uint8 *)prec;
277 data.dsize = sizeof(struct pipe_open_rec);
279 if (!(dbrec = connections_fetch_record(prec, *key))) {
280 DEBUG(0, ("connections_fetch_record failed\n"));
284 ret = NT_STATUS_IS_OK(dbrec->store(dbrec, data, TDB_REPLACE));
291 /*********************************************************************
292 *********************************************************************/
294 BOOL delete_pipe_opendb( smb_np_struct *p )
296 struct db_record *dbrec;
297 struct pipe_open_rec *prec;
301 if ( (prec = TALLOC_P( NULL, struct pipe_open_rec)) == NULL ) {
302 DEBUG(0,("store_pipe_opendb: talloc failed!\n"));
306 fill_pipe_open_rec( prec, p );
307 if ( (key = make_pipe_rec_key( prec )) == NULL ) {
311 if (!(dbrec = connections_fetch_record(prec, *key))) {
312 DEBUG(0, ("connections_fetch_record failed\n"));
316 ret = NT_STATUS_IS_OK(dbrec->delete_rec(dbrec));