From: Evan Hunt <each@isc.org>
Date: Fri, 11 Nov 2011 01:00:40 +0000 (+0000)
Subject: Add ISC_R_NOMORE to dlz_minimal.h, document its use in findzone() routines.
X-Git-Tag: v9.9.0b2~20
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2db105b04c05f523ab0a4ad031e65bc4aa138085;p=thirdparty%2Fbind9.git

Add ISC_R_NOMORE to dlz_minimal.h, document its use in findzone() routines.
No CHANGES note.
---

diff --git a/contrib/dlz/example/README b/contrib/dlz/example/README
index 42d38ce455e..3468b6d8f2d 100644
--- a/contrib/dlz/example/README
+++ b/contrib/dlz/example/README
@@ -110,9 +110,12 @@ are mandatory, others optional).
 
   - isc_result_t dlz_findzonedb(void *dbdata, const char *name);
 
-    Required for all external DLZ modules.  This indicates whether the
-    DLZ module can answer for a given zone.  Returns ISC_R_SUCCESS if
-    so, otherwise ISC_R_NOTFOUND.
+    Required for all external DLZ modules.  This indicates whether
+    the DLZ module can answer for the given name.  Returns ISC_R_SUCCESS
+    if so, and ISC_R_NOTFOUND if not.  As an optimization, it can
+    also return ISC_R_NOMORE: this indicates that the DLZ module has
+    no data for the given name or for any name above it in the DNS.
+    This prevents named from searching for a zone cut.
 
    - isc_result_t dlz_lookup(const char *zone, const char *name, void *dbdata,
                              dns_sdlzlookup_t *lookup,
diff --git a/contrib/dlz/example/dlz_minimal.h b/contrib/dlz/example/dlz_minimal.h
index bfad3b2ad0b..c72c1d4c752 100644
--- a/contrib/dlz/example/dlz_minimal.h
+++ b/contrib/dlz/example/dlz_minimal.h
@@ -47,6 +47,7 @@ typedef uint32_t dns_ttl_t;
 #define ISC_R_NOPERM			6
 #define ISC_R_NOTFOUND			23
 #define ISC_R_FAILURE			25
+#define ISC_R_NOMORE			29
 
 /* boolean values */
 #define ISC_TRUE 1