PAM: make initgroups timeout work across multiple clients

Instead of timing out the initgroups lookup on a per-cctx basis,
we will maintain a hash table of recently-seen users and use this
instead. This will allow SSSD to handle user's logging into
multiple services simultaneously more graciously, as well as
playing nicer with SSH (which makes calls to PAM both before and
after a fork).

https://fedorahosted.org/sssd/ticket/1063

1 files changed, 38 insertions, 0 deletions

diff --git a/src/responder/pam/pam_helpers.h b/src/responder/pam/pam_helpers.h
new file mode 100644
index 000000000..1e1d914df
--- /dev/null
+++ b/src/responder/pam/pam_helpers.h
@@ -0,0 +1,38 @@
+/*
+    SSSD
+
+    Authors:
+        Stephen Gallagher <sgallagh@redhat.com>
+
+    Copyright (C) 2011 Red Hat
+
+    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/>.
+*/
+
+#ifndef PAM_HELPERS_H_
+#define PAM_HELPERS_H_
+
+errno_t pam_initgr_cache_set(struct tevent_context *ev,
+                             hash_table_t *id_table,
+                             char *name,
+                             long timeout);
+
+/* Returns EOK if the cache is still valid
+ * Returns ENOENT if the user is not found or is expired
+ * May report other errors if the hash lookup fails.
+ */
+errno_t pam_initgr_check_timeout(hash_table_t *id_table,
+                              char *name);
+
+#endif /* PAM_HELPERS_H_ */