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 2 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, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 /****************************************************************************
24 Delete a connection record.
25 ****************************************************************************/
27 BOOL
yield_connection(connection_struct
*conn
, const char *name
)
29 struct db_record
*rec
;
32 DEBUG(3,("Yielding connection to %s\n",name
));
34 if (!(rec
= connections_fetch_entry(NULL
, conn
, name
))) {
35 DEBUG(0, ("connections_fetch_entry failed\n"));
39 status
= rec
->delete_rec(rec
);
40 if (!NT_STATUS_IS_OK(status
)) {
41 DEBUG( NT_STATUS_EQUAL(status
, NT_STATUS_NOT_FOUND
) ? 3 : 0,
42 ("deleting connection record returned %s\n",
47 return NT_STATUS_IS_OK(status
);
57 /****************************************************************************
58 Count the entries belonging to a service in the connection db.
59 ****************************************************************************/
61 static int count_fn(struct db_record
*rec
,
62 const struct connections_key
*ckey
,
63 const struct connections_data
*crec
,
66 struct count_stat
*cs
= (struct count_stat
*)udp
;
68 if (crec
->cnum
== -1) {
72 /* If the pid was not found delete the entry from connections.tdb */
74 if (cs
->Clear
&& !process_exists(crec
->pid
) && (errno
== ESRCH
)) {
76 DEBUG(2,("pid %s doesn't exist - deleting connections %d [%s]\n",
77 procid_str_static(&crec
->pid
), crec
->cnum
,
80 status
= rec
->delete_rec(rec
);
81 if (!NT_STATUS_IS_OK(status
)) {
82 DEBUG(0,("count_fn: tdb_delete failed with error %s\n",
89 /* We are counting all the connections to a given share. */
90 if (strequal(crec
->servicename
, cs
->name
)) {
91 cs
->curr_connections
++;
94 /* We are counting all the connections. Static registrations
95 * like the lpq backgroud process and the smbd daemon process
96 * have a cnum of -1, so won't be counted here.
98 cs
->curr_connections
++;
104 /****************************************************************************
105 Claim an entry in the connections database.
106 ****************************************************************************/
108 int count_current_connections( const char *sharename
, BOOL clear
)
110 struct count_stat cs
;
112 cs
.mypid
= sys_getpid();
113 cs
.curr_connections
= 0;
118 * This has a race condition, but locking the chain before hand is worse
119 * as it leads to deadlock.
122 if (connections_forall(count_fn
, &cs
) == -1) {
123 DEBUG(0,("count_current_connections: traverse of "
124 "connections.tdb failed\n"));
125 DEBUGADD(0, ("count_current_connections: connection count of %d might not be accurate",
126 cs
.curr_connections
));
129 /* If the traverse failed part-way through, we at least return
130 * as many connections as we had already counted. If it failed
131 * right at the start, we will return 0, which is about all we
135 return cs
.curr_connections
;
138 /****************************************************************************
139 Count the number of connections open across all shares.
140 ****************************************************************************/
142 int count_all_current_connections(void)
144 return count_current_connections(NULL
, True
/* clear stale entries */);
147 /****************************************************************************
148 Claim an entry in the connections database.
149 ****************************************************************************/
151 BOOL
claim_connection(connection_struct
*conn
, const char *name
,
154 struct db_record
*rec
;
155 struct connections_data crec
;
159 DEBUG(5,("claiming [%s]\n", name
));
161 if (!(rec
= connections_fetch_entry(NULL
, conn
, name
))) {
162 DEBUG(0, ("connections_fetch_entry failed\n"));
166 /* fill in the crec */
168 crec
.magic
= 0x280267;
169 crec
.pid
= procid_self();
170 crec
.cnum
= conn
?conn
->cnum
:-1;
172 crec
.uid
= conn
->uid
;
173 crec
.gid
= conn
->gid
;
174 strlcpy(crec
.servicename
, lp_servicename(SNUM(conn
)),
175 sizeof(crec
.servicename
));
177 crec
.start
= time(NULL
);
178 crec
.bcast_msg_flags
= msg_flags
;
180 strlcpy(crec
.machine
,get_remote_machine_name(),sizeof(crec
.machine
));
181 strlcpy(crec
.addr
,conn
?conn
->client_address
:client_addr(),
184 dbuf
.dptr
= (uint8
*)&crec
;
185 dbuf
.dsize
= sizeof(crec
);
187 status
= rec
->store(rec
, dbuf
, TDB_REPLACE
);
191 if (!NT_STATUS_IS_OK(status
)) {
192 DEBUG(0,("claim_connection: tdb_store failed with error %s.\n",
200 BOOL
register_message_flags(BOOL doreg
, uint32 msg_flags
)
202 struct db_record
*rec
;
203 struct connections_data
*pcrec
;
206 DEBUG(10,("register_message_flags: %s flags 0x%x\n",
207 doreg
? "adding" : "removing",
208 (unsigned int)msg_flags
));
210 if (!(rec
= connections_fetch_entry(NULL
, NULL
, NULL
))) {
211 DEBUG(0, ("connections_fetch_entry failed\n"));
215 if (rec
->value
.dsize
!= sizeof(struct connections_data
)) {
216 DEBUG(0,("register_message_flags: Got wrong record size\n"));
221 pcrec
= (struct connections_data
*)rec
->value
.dptr
;
223 pcrec
->bcast_msg_flags
|= msg_flags
;
225 pcrec
->bcast_msg_flags
&= ~msg_flags
;
227 status
= rec
->store(rec
, rec
->value
, TDB_REPLACE
);
231 if (!NT_STATUS_IS_OK(status
)) {
232 DEBUG(0,("register_message_flags: tdb_store failed: %s.\n",
237 DEBUG(10,("register_message_flags: new flags 0x%x\n",
238 (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
));