Link Info API

Modules
	VLAN

Data Structures
struct	rtnl_link_info_ops
	Link info operations. More...

Functions
struct rtnl_link_info_ops *	rtnl_link_info_ops_lookup (const char *name)
int	rtnl_link_register_info (struct rtnl_link_info_ops *ops)
int	rtnl_link_unregister_info (struct rtnl_link_info_ops *ops)

Detailed Description

1) Registering/Unregistering a new link info type

static struct rtnl_link_info_ops vlan_info_ops = {
        .io_name                = "vlan",
        .io_alloc               = vlan_alloc,
        .io_parse               = vlan_parse,
        .io_dump[NL_DUMP_BRIEF] = vlan_dump_brief,
        .io_dump[NL_DUMP_FULL]  = vlan_dump_full,
        .io_free                = vlan_free,
};
 
static void __init vlan_init(void)
{
        rtnl_link_register_info(&vlan_info_ops);
}
 
static void __exit vlan_exit(void)
{
        rtnl_link_unregister_info(&vlan_info_ops);
}

Function Documentation

rtnl_link_info_ops_lookup()

struct rtnl_link_info_ops * rtnl_link_info_ops_lookup

(

const char *

name

)

Definition at line 50 of file api.c.

{
        struct rtnl_link_info_ops *ops;
 
        for (ops = info_ops; ops; ops = ops->io_next)
                if (!strcmp(ops->io_name, name))
                        return ops;
 
        return NULL;
}

rtnl_link_register_info()

int rtnl_link_register_info

(

struct rtnl_link_info_ops *

ops

)

Definition at line 61 of file api.c.

{
        if (ops->io_name == NULL)
                return nl_error(EINVAL, "No name specified");
 
        if (rtnl_link_info_ops_lookup(ops->io_name))
                return nl_error(EEXIST, "Link info operations already exist");
 
        NL_DBG(1, "Registered link info operations %s\n", ops->io_name);
 
        ops->io_next = info_ops;
        info_ops = ops;
 
        return 0;
}

rtnl_link_unregister_info()

int rtnl_link_unregister_info

(

struct rtnl_link_info_ops *

ops

)

Definition at line 77 of file api.c.

{
        struct rtnl_link_info_ops *t, **tp;
 
        for (tp = &info_ops; (t=*tp) != NULL; tp = &t->io_next)
                if (t == ops)
                        break;
 
        if (!t)
                return nl_error(ENOENT, "No such link info operations");
 
        if (t->io_refcnt > 0)
                return nl_error(EBUSY, "Info operations in use");
 
        NL_DBG(1, "Unregistered link info perations %s\n", ops->io_name);
 
        *tp = t->io_next;
        return 0;
}