/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
connection claim routines
Copyright (C) Andrew Tridgell 1998
-
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
-
-
-extern fstring remote_machine;
-static TDB_CONTEXT *tdb;
-
-extern int DEBUGLEVEL;
-
-/****************************************************************************
- Return the connection tdb context (used for message send all).
-****************************************************************************/
-
-TDB_CONTEXT *conn_tdb_ctx(void)
-{
- return tdb;
-}
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "dbwrap.h"
+#include "auth.h"
/****************************************************************************
Delete a connection record.
****************************************************************************/
-BOOL yield_connection(connection_struct *conn,char *name,int max_connections)
+bool yield_connection(connection_struct *conn, const char *name)
{
- struct connections_key key;
- TDB_DATA kbuf;
-
- if (!tdb) return False;
+ struct db_record *rec;
+ NTSTATUS status;
DEBUG(3,("Yielding connection to %s\n",name));
- ZERO_STRUCT(key);
- key.pid = sys_getpid();
- key.cnum = conn?conn->cnum:-1;
- fstrcpy(key.name, name);
- dos_to_unix(key.name, True); /* Convert key to unix-codepage */
-
- kbuf.dptr = (char *)&key;
- kbuf.dsize = sizeof(key);
+ rec = connections_fetch_entry(talloc_tos(), conn, name);
+ if (rec == NULL) {
+ DEBUG(0, ("connections_fetch_entry failed\n"));
+ return False;
+ }
- tdb_delete(tdb, kbuf);
+ status = rec->delete_rec(rec);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG( NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND) ? 3 : 0,
+ ("deleting connection record returned %s\n",
+ nt_errstr(status)));
+ }
- return(True);
+ TALLOC_FREE(rec);
+ return NT_STATUS_IS_OK(status);
}
struct count_stat {
- pid_t mypid;
int curr_connections;
- char *name;
- BOOL Clear;
+ const char *name;
+ bool Clear;
};
/****************************************************************************
Count the entries belonging to a service in the connection db.
****************************************************************************/
-static int count_fn( TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf, void *udp)
+static int count_fn(struct db_record *rec,
+ const struct connections_key *ckey,
+ const struct connections_data *crec,
+ void *udp)
{
- struct connections_data crec;
struct count_stat *cs = (struct count_stat *)udp;
-
- if (dbuf.dsize != sizeof(crec))
- return 0;
- memcpy(&crec, dbuf.dptr, sizeof(crec));
-
- if (crec.cnum == -1)
+ if (crec->cnum == -1) {
return 0;
+ }
/* If the pid was not found delete the entry from connections.tdb */
- if (cs->Clear && !process_exists(crec.pid) && (errno == ESRCH)) {
- DEBUG(2,("pid %u doesn't exist - deleting connections %d [%s]\n",
- (unsigned int)crec.pid, crec.cnum, crec.name));
- tdb_delete(the_tdb, kbuf);
+ if (cs->Clear && !process_exists(crec->pid) && (errno == ESRCH)) {
+ NTSTATUS status;
+ DEBUG(2,("pid %s doesn't exist - deleting connections %d [%s]\n",
+ procid_str_static(&crec->pid), crec->cnum,
+ crec->servicename));
+
+ status = rec->delete_rec(rec);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("count_fn: tdb_delete failed with error %s\n",
+ nt_errstr(status)));
+ }
return 0;
}
- if (strequal(crec.name, cs->name))
+ if (strequal(crec->servicename, cs->name))
cs->curr_connections++;
return 0;
Claim an entry in the connections database.
****************************************************************************/
-BOOL claim_connection(connection_struct *conn,char *name,int max_connections,BOOL Clear)
+int count_current_connections( const char *sharename, bool clear )
{
- struct connections_key key;
- struct connections_data crec;
- TDB_DATA kbuf, dbuf, lockkey;
- BOOL rec_locked = False;
- BOOL ret = True;
+ struct count_stat cs;
- if (!tdb) {
- tdb = tdb_open(lock_path("connections.tdb"), 0, TDB_CLEAR_IF_FIRST,
- O_RDWR | O_CREAT, 0644);
- }
- if (!tdb)
- return False;
+ cs.curr_connections = 0;
+ cs.name = sharename;
+ cs.Clear = clear;
/*
- * Enforce the max connections parameter.
+ * This has a race condition, but locking the chain before hand is worse
+ * as it leads to deadlock.
*/
- if (max_connections > 0) {
- struct count_stat cs;
-
- cs.mypid = sys_getpid();
- cs.curr_connections = 0;
- cs.name = lp_servicename(SNUM(conn));
- cs.Clear = Clear;
-
- lockkey.dptr = cs.name;
- lockkey.dsize = strlen(cs.name)+1;
+ if (connections_forall(count_fn, &cs) == -1) {
+ DEBUG(0,("count_current_connections: traverse of "
+ "connections.tdb failed\n"));
+ return False;
+ }
- /*
- * Go through and count the connections with hash chain representing the service name
- * locked. This is slow but removes race conditions. JRA.
- */
+ return cs.curr_connections;
+}
- if (tdb_chainlock(tdb, lockkey))
- return False;
+/****************************************************************************
+ Claim an entry in the connections database.
+****************************************************************************/
- rec_locked = True;
+bool claim_connection(connection_struct *conn, const char *name)
+{
+ struct db_record *rec;
+ struct connections_data crec;
+ TDB_DATA dbuf;
+ NTSTATUS status;
- if (tdb_traverse(tdb, count_fn, &cs) == -1) {
- DEBUG(0,("claim_connection: traverse of connections.tdb failed.\n"));
- ret = False;
- goto out;
- }
+ DEBUG(5,("claiming [%s]\n", name));
- if (cs.curr_connections >= max_connections) {
- DEBUG(1,("claim_connection: Max connections (%d) exceeded for %s\n",
- max_connections, name ));
- ret = False;
- goto out;
- }
+ if (!(rec = connections_fetch_entry(talloc_tos(), conn, name))) {
+ DEBUG(0, ("connections_fetch_entry failed\n"));
+ return False;
}
- DEBUG(5,("claiming %s %d\n",name,max_connections));
-
- ZERO_STRUCT(key);
- key.pid = sys_getpid();
- key.cnum = conn?conn->cnum:-1;
- fstrcpy(key.name, name);
- dos_to_unix(key.name, True); /* Convert key to unix-codepage */
-
- kbuf.dptr = (char *)&key;
- kbuf.dsize = sizeof(key);
-
/* fill in the crec */
ZERO_STRUCT(crec);
crec.magic = 0x280267;
- crec.pid = sys_getpid();
- crec.cnum = conn?conn->cnum:-1;
- if (conn) {
- crec.uid = conn->uid;
- crec.gid = conn->gid;
- StrnCpy(crec.name,
- lp_servicename(SNUM(conn)),sizeof(crec.name)-1);
- }
+ crec.pid = sconn_server_id(conn->sconn);
+ crec.cnum = conn->cnum;
+ crec.uid = conn->session_info->utok.uid;
+ crec.gid = conn->session_info->utok.gid;
+ strlcpy(crec.servicename, lp_servicename(SNUM(conn)),
+ sizeof(crec.servicename));
crec.start = time(NULL);
-
- StrnCpy(crec.machine,remote_machine,sizeof(crec.machine)-1);
- StrnCpy(crec.addr,conn?conn->client_address:client_addr(),sizeof(crec.addr)-1);
- dbuf.dptr = (char *)&crec;
+ strlcpy(crec.machine,get_remote_machine_name(),sizeof(crec.machine));
+ strlcpy(crec.addr, conn->sconn->client_id.addr, sizeof(crec.addr));
+
+ dbuf.dptr = (uint8 *)&crec;
dbuf.dsize = sizeof(crec);
- if (tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) != 0)
- ret = False;
+ status = rec->store(rec, dbuf, TDB_REPLACE);
- out:
+ TALLOC_FREE(rec);
- if (rec_locked)
- tdb_chainunlock(tdb, lockkey);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("claim_connection: tdb_store failed with error %s.\n",
+ nt_errstr(status)));
+ return False;
+ }
- return ret;
+ return True;
}
git.samba.org / ira / wip.git / blobdiff