genetlink: unify registration functions

Now that the ops assignment is just two variables rather than a
long list iteration etc., there's no reason to separately export
__genl_register_family() and __genl_register_family_with_ops().

Unify the two functions into __genl_register_family() and make
genl_register_family_with_ops() call it after assigning the ops.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 40 insertions, 41 deletions

diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 0b6a144468c6..e96385d46b48 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -131,14 +131,34 @@ static inline int genl_register_family(struct genl_family *family)
         return __genl_register_family(family);
 }
 
-int __genl_register_family_with_ops(struct genl_family *family,
-                                    const struct genl_ops *ops, size_t n_ops);
-
+/**
+ * genl_register_family_with_ops - register a generic netlink family with ops
+ * @family: generic netlink family
+ * @ops: operations to be registered
+ * @n_ops: number of elements to register
+ *
+ * Registers the specified family and operations from the specified table.
+ * Only one family may be registered with the same family name or identifier.
+ *
+ * The family id may equal GENL_ID_GENERATE causing an unique id to
+ * be automatically generated and assigned.
+ *
+ * Either a doit or dumpit callback must be specified for every registered
+ * operation or the function will fail. Only one operation structure per
+ * command identifier may be registered.
+ *
+ * See include/net/genetlink.h for more documenation on the operations
+ * structure.
+ *
+ * Return 0 on success or a negative error code.
+ */
 static inline int genl_register_family_with_ops(struct genl_family *family,
         const struct genl_ops *ops, size_t n_ops)
 {
         family->module = THIS_MODULE;
-        return __genl_register_family_with_ops(family, ops, n_ops);
+        family->ops = ops;
+        family->n_ops = n_ops;
+        return __genl_register_family(family);
 }
 
 int genl_unregister_family(struct genl_family *family);
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index a7c62d3d05a1..f07eb568a1db 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -283,12 +283,18 @@ static void genl_unregister_mc_groups(struct genl_family *family)
                 __genl_unregister_mc_group(family, grp);
 }
 
-static int genl_validate_add_ops(struct genl_family *family,
-                                 const struct genl_ops *ops,
-                                 unsigned int n_ops)
+static int genl_validate_ops(struct genl_family *family)
 {
+        const struct genl_ops *ops = family->ops;
+        unsigned int n_ops = family->n_ops;
         int i, j;
 
+        if (WARN_ON(n_ops && !ops))
+                return -EINVAL;
+
+        if (!n_ops)
+                return 0;
+
         for (i = 0; i < n_ops; i++) {
                 if (ops[i].dumpit == NULL && ops[i].doit == NULL)
                         return -EINVAL;
@@ -313,6 +319,9 @@ static int genl_validate_add_ops(struct genl_family *family,
  * The family id may equal GENL_ID_GENERATE causing an unique id to
  * be automatically generated and assigned.
  *
+ * The family's ops array must already be assigned, you can use the
+ * genl_register_family_with_ops() helper function.
+ *
  * Return 0 on success or a negative error code.
  */
 int __genl_register_family(struct genl_family *family)
@@ -325,6 +334,10 @@ int __genl_register_family(struct genl_family *family)
         if (family->id > GENL_MAX_ID)
                 goto errout;
 
+        err = genl_validate_ops(family);
+        if (err)
+                return err;
+
         INIT_LIST_HEAD(&family->mcast_groups);
 
         genl_lock_all();
@@ -373,40 +386,6 @@ errout:
 EXPORT_SYMBOL(__genl_register_family);
 
 /**
- * __genl_register_family_with_ops - register a generic netlink family
- * @family: generic netlink family
- * @ops: operations to be registered
- * @n_ops: number of elements to register
- *
- * Registers the specified family and operations from the specified table.
- * Only one family may be registered with the same family name or identifier.
- *
- * The family id may equal GENL_ID_GENERATE causing an unique id to
- * be automatically generated and assigned.
- *
- * Either a doit or dumpit callback must be specified for every registered
- * operation or the function will fail. Only one operation structure per
- * command identifier may be registered.
- *
- * See include/net/genetlink.h for more documenation on the operations
- * structure.
- *
- * Return 0 on success or a negative error code.
- */
-int __genl_register_family_with_ops(struct genl_family *family,
-        const struct genl_ops *ops, size_t n_ops)
-{
-        int err;
-
-        err = genl_validate_add_ops(family, ops, n_ops);
-        if (err)
-                return err;
-
-        return __genl_register_family(family);
-}
-EXPORT_SYMBOL(__genl_register_family_with_ops);
-
-/**
  * genl_unregister_family - unregister generic netlink family
  * @family: generic netlink family
  *