SYSDB: Search the timestamp caches in addition to the sysdb cache

When a sysdb entry is searched, the sysdb cache is consulted first
for users or groups. If an entry is found in the sysdb cache, the
attributes from the timestamp cache are merged to return the full and
up-to-date set of attributes.

The merging is done with a single BASE search which is a direct lookup
into the underlying key-value database, so it should be relatively fast.
More complex merging is done only for enumeration by filter which is
currently done only via the IFP back end and should be quite
infrequent, so I hope we can justify a more complex merging there.

Reviewed-by: Sumit Bose <sbose@redhat.com>

2 files changed, 4 insertions, 0 deletions

diff --git a/src/util/util_errors.c b/src/util/util_errors.c
index 458321a08..2d2bafb1e 100644
--- a/src/util/util_errors.c
+++ b/src/util/util_errors.c
@@ -91,6 +91,8 @@ struct err_string error_to_str[] = {
     { "SBUS request already handled" }, /* ERR_SBUS_REQUEST_HANDLED */
     { "Sysdb version is too old" },  /* ERR_SYSDB_VERSION_TOO_OLD */
     { "Sysdb version is too new" },  /* ERR_SYSDB_VERSION_TOO_NEW */
+    { "Domain has to timestamp cache" }, /* ERR_NO_TS */
+    { "No timestamp cache record" }, /* ERR_TS_CACHE_MISS */
     { "ERR_LAST" } /* ERR_LAST */
 };
 
diff --git a/src/util/util_errors.h b/src/util/util_errors.h
index 2f4791522..e8ea87765 100644
--- a/src/util/util_errors.h
+++ b/src/util/util_errors.h
@@ -113,6 +113,8 @@ enum sssd_errors {
     ERR_SBUS_REQUEST_HANDLED,
     ERR_SYSDB_VERSION_TOO_OLD,
     ERR_SYSDB_VERSION_TOO_NEW,
+    ERR_NO_TS,
+    ERR_TS_CACHE_MISS,
     ERR_LAST            /* ALWAYS LAST */
 };