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wimax: use genl_register_family_with_ops()

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This simplifies the code since there's no longer a need to
have error handling in the registration.

Unfortunately it means more extern function declarations are
needed, but the overall goal would seem to justify this.

Due to the removal of duplication in the netlink policies,
this reduces the size of wimax by almost 1k.

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 2013-11-14 17:14:42 +01:00 • committed by David S. Miller
parent 1c582d915d
commit b61a5eea59
6 changed files with 47 additions and 119 deletions
Download patch file Download diff file Expand all files Collapse all files

79
net/wimax/stack.c
View file

@ -402,22 +402,44 @@ void wimax_dev_init(struct wimax_dev *wimax_dev)
}
EXPORT_SYMBOL_GPL(wimax_dev_init);
/*
* This extern is declared here because it's easier to keep track --
* both declarations are a list of the same
*/
extern struct genl_ops
wimax_gnl_msg_from_user,
wimax_gnl_reset,
wimax_gnl_rfkill,
wimax_gnl_state_get;
static const struct nla_policy wimax_gnl_policy[WIMAX_GNL_ATTR_MAX + 1] = {
[WIMAX_GNL_RESET_IFIDX] = { .type = NLA_U32, },
[WIMAX_GNL_RFKILL_IFIDX] = { .type = NLA_U32, },
[WIMAX_GNL_RFKILL_STATE] = {
.type = NLA_U32 /* enum wimax_rf_state */
},
[WIMAX_GNL_STGET_IFIDX] = { .type = NLA_U32, },
[WIMAX_GNL_MSG_IFIDX] = { .type = NLA_U32, },
[WIMAX_GNL_MSG_DATA] = {
.type = NLA_UNSPEC, /* libnl doesn't grok BINARY yet */
},
};
static
struct genl_ops *wimax_gnl_ops[] = {
&wimax_gnl_msg_from_user,
&wimax_gnl_reset,
&wimax_gnl_rfkill,
&wimax_gnl_state_get,
static struct genl_ops wimax_gnl_ops[] = {
{
.cmd = WIMAX_GNL_OP_MSG_FROM_USER,
.flags = GENL_ADMIN_PERM,
.policy = wimax_gnl_policy,
.doit = wimax_gnl_doit_msg_from_user,
},
{
.cmd = WIMAX_GNL_OP_RESET,
.flags = GENL_ADMIN_PERM,
.policy = wimax_gnl_policy,
.doit = wimax_gnl_doit_reset,
},
{
.cmd = WIMAX_GNL_OP_RFKILL,
.flags = GENL_ADMIN_PERM,
.policy = wimax_gnl_policy,
.doit = wimax_gnl_doit_rfkill,
},
{
.cmd = WIMAX_GNL_OP_STATE_GET,
.flags = GENL_ADMIN_PERM,
.policy = wimax_gnl_policy,
.doit = wimax_gnl_doit_state_get,
},
};
@ -567,7 +589,7 @@ struct genl_multicast_group wimax_gnl_mcg = {
static
int __init wimax_subsys_init(void)
{
int result, cnt;
int result;
d_fnstart(4, NULL, "()\n");
d_parse_params(D_LEVEL, D_LEVEL_SIZE, wimax_debug_params,
@ -575,26 +597,14 @@ int __init wimax_subsys_init(void)
snprintf(wimax_gnl_family.name, sizeof(wimax_gnl_family.name),
"WiMAX");
result = genl_register_family(&wimax_gnl_family);
result = genl_register_family_with_ops(&wimax_gnl_family, wimax_gnl_ops,
ARRAY_SIZE(wimax_gnl_ops));
if (unlikely(result < 0)) {
printk(KERN_ERR "cannot register generic netlink family: %d\n",
result);
goto error_register_family;
}
for (cnt = 0; cnt < ARRAY_SIZE(wimax_gnl_ops); cnt++) {
result = genl_register_ops(&wimax_gnl_family,
wimax_gnl_ops[cnt]);
d_printf(4, NULL, "registering generic netlink op code "
"%u: %d\n", wimax_gnl_ops[cnt]->cmd, result);
if (unlikely(result < 0)) {
printk(KERN_ERR "cannot register generic netlink op "
"code %u: %d\n",
wimax_gnl_ops[cnt]->cmd, result);
goto error_register_ops;
}
}
result = genl_register_mc_group(&wimax_gnl_family, &wimax_gnl_mcg);
if (result < 0)
goto error_mc_group;
@ -602,10 +612,6 @@ int __init wimax_subsys_init(void)
return 0;
error_mc_group:
error_register_ops:
for (cnt--; cnt >= 0; cnt--)
genl_unregister_ops(&wimax_gnl_family,
wimax_gnl_ops[cnt]);
genl_unregister_family(&wimax_gnl_family);
error_register_family:
d_fnend(4, NULL, "() = %d\n", result);
@ -619,12 +625,7 @@ module_init(wimax_subsys_init);
static
void __exit wimax_subsys_exit(void)
{
int cnt;
wimax_id_table_release();
genl_unregister_mc_group(&wimax_gnl_family, &wimax_gnl_mcg);
for (cnt = ARRAY_SIZE(wimax_gnl_ops) - 1; cnt >= 0; cnt--)
genl_unregister_ops(&wimax_gnl_family,
wimax_gnl_ops[cnt]);
genl_unregister_family(&wimax_gnl_family);
}
module_exit(wimax_subsys_exit);