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",
88 /* We are counting all the connections to a given share. */
89 if (strequal(crec->servicename, cs->name)) {
90 cs->curr_connections++;
93 /* We are counting all the connections. Static registrations
94 * like the lpq backgroud process and the smbd daemon process
95 * have a cnum of -1, so won't be counted here.
97 cs->curr_connections++;
103 /****************************************************************************
104 Claim an entry in the connections database.
105 ****************************************************************************/
107 int count_current_connections( const char *sharename, BOOL clear )
109 struct count_stat cs;
111 cs.mypid = sys_getpid();
112 cs.curr_connections = 0;
117 * This has a race condition, but locking the chain before hand is worse
118 * as it leads to deadlock.
121 if (connections_forall(count_fn, &cs) == -1) {
122 DEBUG(0,("count_current_connections: traverse of "
123 "connections.tdb failed\n"));
124 DEBUGADD(0, ("count_current_connections: connection count of %d might not be accurate",
125 cs.curr_connections));
128 /* If the traverse failed part-way through, we at least return
129 * as many connections as we had already counted. If it failed
130 * right at the start, we will return 0, which is about all we
134 return cs.curr_connections;
137 /****************************************************************************
138 Count the number of connections open across all shares.
139 ****************************************************************************/
141 int count_all_current_connections(void)
143 return count_current_connections(NULL, True /* clear stale entries */);
146 /****************************************************************************
147 Claim an entry in the connections database.
148 ****************************************************************************/
150 BOOL claim_connection(connection_struct *conn, const char *name,
153 struct db_record *rec;
154 struct connections_data crec;
158 DEBUG(5,("claiming [%s]\n", name));
160 if (!(rec = connections_fetch_entry(NULL, conn, name))) {
161 DEBUG(0, ("connections_fetch_entry failed\n"));
165 /* fill in the crec */
167 crec.magic = 0x280267;
168 crec.pid = procid_self();
169 crec.cnum = conn?conn->cnum:-1;
171 crec.uid = conn->uid;
172 crec.gid = conn->gid;
173 strlcpy(crec.servicename, lp_servicename(SNUM(conn)),
174 sizeof(crec.servicename));
176 crec.start = time(NULL);
177 crec.bcast_msg_flags = msg_flags;
179 strlcpy(crec.machine,get_remote_machine_name(),sizeof(crec.machine));
180 strlcpy(crec.addr,conn?conn->client_address:client_addr(),
183 dbuf.dptr = (uint8 *)&crec;
184 dbuf.dsize = sizeof(crec);
186 status = rec->store(rec, dbuf, TDB_REPLACE);
190 if (!NT_STATUS_IS_OK(status)) {
191 DEBUG(0,("claim_connection: tdb_store failed with error %s.\n",
199 BOOL register_message_flags(BOOL doreg, uint32 msg_flags)
201 struct db_record *rec;
202 struct connections_data *pcrec;
205 DEBUG(10,("register_message_flags: %s flags 0x%x\n",
206 doreg ? "adding" : "removing",
207 (unsigned int)msg_flags ));
209 if (!(rec = connections_fetch_entry(NULL, NULL, ""))) {
210 DEBUG(0, ("connections_fetch_entry failed\n"));
214 if (rec->value.dsize != sizeof(struct connections_data)) {
215 DEBUG(0,("register_message_flags: Got wrong record size\n"));
220 pcrec = (struct connections_data *)rec->value.dptr;
222 pcrec->bcast_msg_flags |= msg_flags;
224 pcrec->bcast_msg_flags &= ~msg_flags;
226 status = rec->store(rec, rec->value, TDB_REPLACE);
228 if (!NT_STATUS_IS_OK(status)) {
229 DEBUG(0,("register_message_flags: tdb_store failed: %s.\n",
235 DEBUG(10,("register_message_flags: new flags 0x%x\n",
236 (unsigned int)pcrec->bcast_msg_flags ));
243 /*********************************************************************
244 *********************************************************************/
246 static TDB_DATA* make_pipe_rec_key( struct pipe_open_rec *prec )
248 TDB_DATA *kbuf = NULL;
254 if ( (kbuf = TALLOC_P(prec, TDB_DATA)) == NULL ) {
258 snprintf( key_string, sizeof(key_string), "%s/%d/%d",
259 prec->name, procid_to_pid(&prec->pid), prec->pnum );
261 *kbuf = string_term_tdb_data(talloc_strdup(prec, key_string));
262 if (kbuf->dptr == NULL )
268 /*********************************************************************
269 *********************************************************************/
271 static void fill_pipe_open_rec( struct pipe_open_rec *prec, smb_np_struct *p )
273 prec->pid = pid_to_procid(sys_getpid());
274 prec->pnum = p->pnum;
275 prec->uid = geteuid();
276 fstrcpy( prec->name, p->name );
281 /*********************************************************************
282 *********************************************************************/
284 BOOL store_pipe_opendb( smb_np_struct *p )
286 struct db_record *dbrec;
287 struct pipe_open_rec *prec;
292 if ( (prec = TALLOC_P( NULL, struct pipe_open_rec)) == NULL ) {
293 DEBUG(0,("store_pipe_opendb: talloc failed!\n"));
297 fill_pipe_open_rec( prec, p );
298 if ( (key = make_pipe_rec_key( prec )) == NULL ) {
302 data.dptr = (uint8 *)prec;
303 data.dsize = sizeof(struct pipe_open_rec);
305 if (!(dbrec = connections_fetch_record(prec, *key))) {
306 DEBUG(0, ("connections_fetch_record failed\n"));
310 ret = NT_STATUS_IS_OK(dbrec->store(dbrec, data, TDB_REPLACE));
317 /*********************************************************************
318 *********************************************************************/
320 BOOL delete_pipe_opendb( smb_np_struct *p )
322 struct db_record *dbrec;
323 struct pipe_open_rec *prec;
327 if ( (prec = TALLOC_P( NULL, struct pipe_open_rec)) == NULL ) {
328 DEBUG(0,("store_pipe_opendb: talloc failed!\n"));
332 fill_pipe_open_rec( prec, p );
333 if ( (key = make_pipe_rec_key( prec )) == NULL ) {
337 if (!(dbrec = connections_fetch_record(prec, *key))) {
338 DEBUG(0, ("connections_fetch_record failed\n"));
342 ret = NT_STATUS_IS_OK(dbrec->delete_rec(dbrec));