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"
-
-static TDB_CONTEXT *tdb;
-
-/****************************************************************************
- Return the connection tdb context (used for message send all).
-****************************************************************************/
-
-TDB_CONTEXT *conn_tdb_ctx(void)
-{
- if (!tdb)
- tdb = tdb_open_log(lock_path("connections.tdb"), 0, TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
- O_RDWR | O_CREAT, 0644);
-
- return tdb;
-}
-
-static void make_conn_key(connection_struct *conn, const char *name, TDB_DATA *pkbuf, struct connections_key *pkey)
-{
- ZERO_STRUCTP(pkey);
- pkey->pid = sys_getpid();
- pkey->cnum = conn?conn->cnum:-1;
- fstrcpy(pkey->name, name);
-#ifdef DEVELOPER
- /* valgrind fixer... */
- {
- size_t sl = strlen(pkey->name);
- if (sizeof(fstring)-sl)
- memset(&pkey->name[sl], '\0', sizeof(fstring)-sl);
- }
-#endif
-
- pkbuf->dptr = (char *)pkey;
- pkbuf->dsize = sizeof(*pkey);
-}
-
-/****************************************************************************
- Delete a connection record.
-****************************************************************************/
-
-BOOL yield_connection(connection_struct *conn, const char *name)
-{
- struct connections_key key;
- TDB_DATA kbuf;
-
- if (!tdb)
- return False;
-
- DEBUG(3,("Yielding connection to %s\n",name));
-
- make_conn_key(conn, name, &kbuf, &key);
-
- if (tdb_delete(tdb, kbuf) != 0) {
- int dbg_lvl = (!conn && (tdb_error(tdb) == TDB_ERR_NOEXIST)) ? 3 : 0;
- DEBUG(dbg_lvl,("yield_connection: tdb_delete for name %s failed with error %s.\n",
- name, tdb_errorstr(tdb) ));
- return (False);
- }
-
- return(True);
-}
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "dbwrap/dbwrap.h"
+#include "auth.h"
+#include "../lib/tsocket/tsocket.h"
+#include "messages.h"
+#include "lib/conn_tdb.h"
struct count_stat {
- pid_t mypid;
int curr_connections;
- char *name;
- BOOL Clear;
+ const char *name;
+ bool verify;
};
/****************************************************************************
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 smbXsrv_tcon_global0 *tcon,
+ 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)
- 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));
- if (tdb_delete(the_tdb, kbuf) != 0)
- DEBUG(0,("count_fn: tdb_delete failed with error %s\n", tdb_errorstr(tdb) ));
+ if (cs->verify && !process_exists(tcon->server_id)) {
return 0;
}
- if (strequal(crec.name, cs->name))
+ if (strequal(tcon->share_name, cs->name)) {
cs->curr_connections++;
+ }
return 0;
}
Claim an entry in the connections database.
****************************************************************************/
-BOOL claim_connection(connection_struct *conn, const char *name,int max_connections,BOOL Clear, uint32 msg_flags)
+int count_current_connections(const char *sharename, bool verify)
{
- struct connections_key key;
- struct connections_data crec;
- TDB_DATA kbuf, dbuf;
-
- if (!tdb)
- tdb = tdb_open_log(lock_path("connections.tdb"), 0, TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
- O_RDWR | O_CREAT, 0644);
+ struct count_stat cs;
+ NTSTATUS status;
- if (!tdb)
- return False;
+ cs.curr_connections = 0;
+ cs.name = sharename;
+ cs.verify = verify;
/*
- * 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;
-
- /*
- * This has a race condition, but locking the chain before hand is worse
- * as it leads to deadlock.
- */
-
- if (tdb_traverse(tdb, count_fn, &cs) == -1) {
- DEBUG(0,("claim_connection: traverse of connections.tdb failed with error %s.\n",
- tdb_errorstr(tdb) ));
- return False;
- }
-
- if (cs.curr_connections >= max_connections) {
- DEBUG(1,("claim_connection: Max connections (%d) exceeded for %s\n",
- max_connections, name ));
- return False;
- }
- }
-
- DEBUG(5,("claiming %s %d\n",name,max_connections));
-
- make_conn_key(conn, name, &kbuf, &key);
+ status = smbXsrv_tcon_global_traverse(count_fn, &cs);
- /* 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;
- safe_strcpy(crec.name,
- lp_servicename(SNUM(conn)),sizeof(crec.name)-1);
- }
- crec.start = time(NULL);
- crec.bcast_msg_flags = msg_flags;
-
- safe_strcpy(crec.machine,get_remote_machine_name(),sizeof(crec.machine)-1);
- safe_strcpy(crec.addr,conn?conn->client_address:client_addr(),sizeof(crec.addr)-1);
-
- dbuf.dptr = (char *)&crec;
- dbuf.dsize = sizeof(crec);
-
- if (tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) != 0) {
- DEBUG(0,("claim_connection: tdb_store failed with error %s.\n",
- tdb_errorstr(tdb) ));
- return False;
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("count_current_connections: traverse of "
+ "smbXsrv_tcon_global.tdb failed - %s\n",
+ nt_errstr(status)));
+ return 0;
}
- return True;
+ return cs.curr_connections;
}
-BOOL register_message_flags(BOOL doreg, uint32 msg_flags)
+bool connections_snum_used(struct smbd_server_connection *unused, int snum)
{
- struct connections_key key;
- struct connections_data *pcrec;
- TDB_DATA kbuf, dbuf;
-
- if (!tdb)
- return False;
+ int active;
- DEBUG(10,("register_message_flags: %s flags 0x%x\n",
- doreg ? "adding" : "removing",
- (unsigned int)msg_flags ));
-
- make_conn_key(NULL, "", &kbuf, &key);
-
- dbuf = tdb_fetch(tdb, kbuf);
- if (!dbuf.dptr) {
- DEBUG(0,("register_message_flags: tdb_fetch failed\n"));
- return False;
+ active = count_current_connections(lp_servicename(talloc_tos(), snum),
+ true);
+ if (active > 0) {
+ return true;
}
- pcrec = (struct connections_data *)dbuf.dptr;
- pcrec->bcast_msg_flags = msg_flags;
- if (doreg)
- pcrec->bcast_msg_flags |= msg_flags;
- else
- pcrec->bcast_msg_flags &= ~msg_flags;
-
- if (tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) != 0) {
- DEBUG(0,("register_message_flags: tdb_store failed with error %s.\n",
- tdb_errorstr(tdb) ));
- SAFE_FREE(dbuf.dptr);
- return False;
- }
-
- DEBUG(10,("register_message_flags: new flags 0x%x\n",
- (unsigned int)pcrec->bcast_msg_flags ));
-
- SAFE_FREE(dbuf.dptr);
- return True;
+ return false;
}
git.samba.org / sfrench / samba-autobuild / .git / blobdiff