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Date: Fri, 15 Nov 2013 14:19:08 +0100
From: Johannes Berg <johannes@...solutions.net>
To: netdev@...r.kernel.org
Cc: Johannes Berg <johannes.berg@...el.com>
Subject: [PATCH] genetlink: unify registration functions
From: Johannes Berg <johannes.berg@...el.com>
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@...el.com>
---
include/net/genetlink.h | 28 ++++++++++++++++++++++----
net/netlink/genetlink.c | 53 +++++++++++++++----------------------------------
2 files changed, 40 insertions(+), 41 deletions(-)
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 0b6a144..e96385d 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 a7c62d3..f07eb56 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
*
--
1.8.4.rc3
--
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