completely new winbindd cache infrastructure

this one looks like just another winbind backend, and has the
following properties:

- does -ve and +ve cacheing of all queries

- can be disabled with -n switch to winbindd

- stores all records packed, so even huge domains are not a problem
for a complete cache

- handles the server being down

- uses sequence numbers for all entries

This fixes a lot of problems with winbindd. Serving from cache is now
*very* fast.
(This used to be commit fddb4f4c04473a60a97212c0c8e143d6a4d68380)

1 files changed, 3 insertions, 1 deletions

diff --git a/source3/nsswitch/winbindd.h b/source3/nsswitch/winbindd.h
index 21dca93af5..a4c0dd970d 100644
--- a/source3/nsswitch/winbindd.h
+++ b/source3/nsswitch/winbindd.h
@@ -136,7 +136,7 @@ struct winbindd_methods {
 				    uint32 **name_types);
 
 	/* return the current global sequence number */
-	uint32 (*sequence_number)(struct winbindd_domain *domain);
+	NTSTATUS (*sequence_number)(struct winbindd_domain *domain, uint32 *seq);
 };
 
 /* Structures to hold per domain information */
@@ -147,6 +147,8 @@ struct winbindd_domain {
                                                   this domain (LDAP or
                                                   RPC) */
 	void *private; /* private data for the backends (used for connection cache) */
+	time_t last_seq_check;
+	uint32 sequence_number;
 	struct winbindd_domain *prev, *next;   /* Linked list info */
 };