views: search overrides for user and group requests

If the name or the POSIX ID of a user or a group is overridden the
search request for those objects have to check the overide objects first
before looking up the original objects.

This patch adds a new request for the IPA sub-domain users which checks
the overrides first if
- SSSD is running in ipa-server-mode and a name or a POSIX ID is
  searched, since we do not override the SIDs we can skip the search in
  the override tree here
- if the responder indicates it has not found the corresponding object
  in the cache and the input might be an override name or ID and not the
  original one of an object.

If an override object was found the SID is extracted from the anchor
attribute and the original object is search by its SID. If no override
object was found the original object is search with the original input
and finally it is checked if an override object exits for the found
object.

Relates to https://fedorahosted.org/sssd/ticket/2375

Reviewed-by: Pavel Březina <pbrezina@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/providers/data_provider.h b/src/providers/data_provider.h
index ec5b79d83..e1cb4befa 100644
--- a/src/providers/data_provider.h
+++ b/src/providers/data_provider.h
@@ -148,6 +148,7 @@
 #define DP_SEC_ID_LEN (sizeof(DP_SEC_ID) - 1)
 
 #define EXTRA_NAME_IS_UPN "U"
+#define EXTRA_INPUT_MAYBE_WITH_VIEW "V"
 
 /* AUTH related common data and functions */