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-rw-r--r--source3/smbd/connection.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/source3/smbd/connection.c b/source3/smbd/connection.c
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+/*
+ 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 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "dbwrap/dbwrap.h"
+#include "auth.h"
+#include "../lib/tsocket/tsocket.h"
+#include "messages.h"
+
+struct count_stat {
+ int curr_connections;
+ const char *name;
+ bool verify;
+};
+
+/****************************************************************************
+ Count the entries belonging to a service in the connection db.
+****************************************************************************/
+
+static int count_fn(struct smbXsrv_tcon_global0 *tcon,
+ void *udp)
+{
+ struct count_stat *cs = (struct count_stat *)udp;
+
+ if (cs->verify && !process_exists(tcon->server_id)) {
+ return 0;
+ }
+
+ if (strequal(tcon->share_name, cs->name)) {
+ cs->curr_connections++;
+ }
+
+ return 0;
+}
+
+/****************************************************************************
+ Claim an entry in the connections database.
+****************************************************************************/
+
+int count_current_connections(const char *sharename, bool verify)
+{
+ struct count_stat cs;
+ NTSTATUS status;
+
+ cs.curr_connections = 0;
+ cs.name = sharename;
+ cs.verify = verify;
+
+ /*
+ * This has a race condition, but locking the chain before hand is worse
+ * as it leads to deadlock.
+ */
+
+ status = smbXsrv_tcon_global_traverse(count_fn, &cs);
+
+ 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 cs.curr_connections;
+}
+
+bool connections_snum_used(struct smbd_server_connection *unused, int snum)
+{
+ const struct loadparm_substitution *lp_sub =
+ loadparm_s3_global_substitution();
+ int active;
+
+ active = count_current_connections(lp_servicename(talloc_tos(), lp_sub, snum),
+ true);
+ if (active > 0) {
+ return true;
+ }
+
+ return false;
+}