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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>
This commit is contained in:
Johannes Berg 2013-11-15 14:19:08 +01:00 committed by David S. Miller
parent 052e312815
commit 568508aa07
2 changed files with 40 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
include/net/genetlink.h
View File

@ -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);

53
net/netlink/genetlink.c
View File

@ -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();
@ -372,40 +385,6 @@ 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