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- /*
- * swconfig.c: Switch configuration API
- *
- * Copyright (C) 2008 Felix Fietkau <[email protected]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
- #include <linux/types.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/list.h>
- #include <linux/if.h>
- #include <linux/if_ether.h>
- #include <linux/capability.h>
- #include <linux/skbuff.h>
- #include <linux/switch.h>
- //#define DEBUG 1
- #ifdef DEBUG
- #define DPRINTF(format, ...) printk("%s: " format, __func__, ##__VA_ARGS__)
- #else
- #define DPRINTF(...) do {} while(0)
- #endif
- MODULE_AUTHOR("Felix Fietkau <[email protected]>");
- MODULE_LICENSE("GPL");
- static int swdev_id = 0;
- static struct list_head swdevs;
- static spinlock_t swdevs_lock = SPIN_LOCK_UNLOCKED;
- struct swconfig_callback;
- struct swconfig_callback
- {
- struct sk_buff *msg;
- struct genlmsghdr *hdr;
- struct genl_info *info;
- int cmd;
- /* callback for filling in the message data */
- int (*fill)(struct swconfig_callback *cb, void *arg);
- /* callback for closing the message before sending it */
- int (*close)(struct swconfig_callback *cb, void *arg);
- struct nlattr *nest[4];
- int args[4];
- };
- /* defaults */
- static int
- swconfig_get_vlan_ports(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
- {
- int ret;
- if (val->port_vlan >= dev->vlans)
- return -EINVAL;
- if (!dev->get_vlan_ports)
- return -EOPNOTSUPP;
- ret = dev->get_vlan_ports(dev, val);
- printk("SET PORTS %d\n", val->len);
- return ret;
- }
- static int
- swconfig_set_vlan_ports(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
- {
- int i;
- if (val->port_vlan >= dev->vlans)
- return -EINVAL;
- /* validate ports */
- if (val->len > dev->ports)
- return -EINVAL;
- for (i = 0; i < val->len; i++) {
- if (val->value.ports[i].id >= dev->ports)
- return -EINVAL;
- }
- if (!dev->set_vlan_ports)
- return -EOPNOTSUPP;
- printk("SET PORTS %d\n", val->len);
- return dev->set_vlan_ports(dev, val);
- }
- static int
- swconfig_apply_config(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
- {
- /* don't complain if not supported by the switch driver */
- if (!dev->apply_config)
- return 0;
- return dev->apply_config(dev);
- }
- enum global_defaults {
- GLOBAL_APPLY,
- };
- enum vlan_defaults {
- VLAN_PORTS,
- };
- enum port_defaults {
- PORT_LINK,
- };
- static struct switch_attr default_global[] = {
- [GLOBAL_APPLY] = {
- .type = SWITCH_TYPE_NOVAL,
- .name = "apply",
- .description = "Activate changes in the hardware",
- .set = swconfig_apply_config,
- }
- };
- static struct switch_attr default_port[] = {
- [PORT_LINK] = {
- .type = SWITCH_TYPE_INT,
- .name = "link",
- .description = "Current link speed",
- }
- };
- static struct switch_attr default_vlan[] = {
- [VLAN_PORTS] = {
- .type = SWITCH_TYPE_PORTS,
- .name = "ports",
- .description = "VLAN port mapping",
- .set = swconfig_set_vlan_ports,
- .get = swconfig_get_vlan_ports,
- },
- };
- static void swconfig_defaults_init(struct switch_dev *dev)
- {
- dev->def_global = 0;
- dev->def_vlan = 0;
- dev->def_port = 0;
- if (dev->get_vlan_ports || dev->set_vlan_ports)
- set_bit(VLAN_PORTS, &dev->def_vlan);
- /* always present, can be no-op */
- set_bit(GLOBAL_APPLY, &dev->def_global);
- }
- static struct genl_family switch_fam = {
- .id = GENL_ID_GENERATE,
- .name = "switch",
- .hdrsize = 0,
- .version = 1,
- .maxattr = SWITCH_ATTR_MAX,
- };
- static const struct nla_policy switch_policy[SWITCH_ATTR_MAX+1] = {
- [SWITCH_ATTR_ID] = { .type = NLA_U32 },
- [SWITCH_ATTR_OP_ID] = { .type = NLA_U32 },
- [SWITCH_ATTR_OP_PORT] = { .type = NLA_U32 },
- [SWITCH_ATTR_OP_VLAN] = { .type = NLA_U32 },
- [SWITCH_ATTR_OP_VALUE_INT] = { .type = NLA_U32 },
- [SWITCH_ATTR_OP_VALUE_STR] = { .type = NLA_NUL_STRING },
- [SWITCH_ATTR_OP_VALUE_PORTS] = { .type = NLA_NESTED },
- [SWITCH_ATTR_TYPE] = { .type = NLA_U32 },
- };
- static const struct nla_policy port_policy[SWITCH_PORT_ATTR_MAX+1] = {
- [SWITCH_PORT_ID] = { .type = NLA_U32 },
- [SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG },
- };
- static inline void
- swconfig_lock(void)
- {
- spin_lock(&swdevs_lock);
- }
- static inline void
- swconfig_unlock(void)
- {
- spin_unlock(&swdevs_lock);
- }
- static struct switch_dev *
- swconfig_get_dev(struct genl_info *info)
- {
- struct switch_dev *dev = NULL;
- struct switch_dev *p;
- int id;
- if (!info->attrs[SWITCH_ATTR_ID])
- goto done;
- id = nla_get_u32(info->attrs[SWITCH_ATTR_ID]);
- swconfig_lock();
- list_for_each_entry(p, &swdevs, dev_list) {
- if (id != p->id)
- continue;
- dev = p;
- break;
- }
- if (dev)
- spin_lock(&dev->lock);
- else
- DPRINTF("device %d not found\n", id);
- swconfig_unlock();
- done:
- return dev;
- }
- static inline void
- swconfig_put_dev(struct switch_dev *dev)
- {
- spin_unlock(&dev->lock);
- }
- static int
- swconfig_dump_attr(struct swconfig_callback *cb, void *arg)
- {
- struct switch_attr *op = arg;
- struct genl_info *info = cb->info;
- struct sk_buff *msg = cb->msg;
- int id = cb->args[0];
- void *hdr;
- hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, &switch_fam,
- NLM_F_MULTI, SWITCH_CMD_NEW_ATTR);
- if (IS_ERR(hdr))
- return -1;
- NLA_PUT_U32(msg, SWITCH_ATTR_OP_ID, id);
- NLA_PUT_U32(msg, SWITCH_ATTR_OP_TYPE, op->type);
- NLA_PUT_STRING(msg, SWITCH_ATTR_OP_NAME, op->name);
- if (op->description)
- NLA_PUT_STRING(msg, SWITCH_ATTR_OP_DESCRIPTION,
- op->description);
- return genlmsg_end(msg, hdr);
- nla_put_failure:
- genlmsg_cancel(msg, hdr);
- return -EMSGSIZE;
- }
- /* spread multipart messages across multiple message buffers */
- static int
- swconfig_send_multipart(struct swconfig_callback *cb, void *arg)
- {
- struct genl_info *info = cb->info;
- int restart = 0;
- int err;
- do {
- if (!cb->msg) {
- cb->msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
- if (cb->msg == NULL)
- goto error;
- }
- if (!(cb->fill(cb, arg) < 0))
- break;
- /* fill failed, check if this was already the second attempt */
- if (restart)
- goto error;
- /* try again in a new message, send the current one */
- restart = 1;
- if (cb->close) {
- if (cb->close(cb, arg) < 0)
- goto error;
- }
- err = genlmsg_unicast(cb->msg, info->snd_pid);
- cb->msg = NULL;
- if (err < 0)
- goto error;
- } while (restart);
- return 0;
- error:
- if (cb->msg)
- nlmsg_free(cb->msg);
- return -1;
- }
- static int
- swconfig_list_attrs(struct sk_buff *skb, struct genl_info *info)
- {
- struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
- const struct switch_attrlist *alist;
- struct switch_dev *dev;
- struct swconfig_callback cb;
- int err = -EINVAL;
- int i;
- /* defaults */
- struct switch_attr *def_list;
- unsigned long *def_active;
- int n_def;
- dev = swconfig_get_dev(info);
- if (!dev)
- return -EINVAL;
- switch(hdr->cmd) {
- case SWITCH_CMD_LIST_GLOBAL:
- alist = &dev->attr_global;
- def_list = default_global;
- def_active = &dev->def_global;
- n_def = ARRAY_SIZE(default_global);
- break;
- case SWITCH_CMD_LIST_VLAN:
- alist = &dev->attr_vlan;
- def_list = default_vlan;
- def_active = &dev->def_vlan;
- n_def = ARRAY_SIZE(default_vlan);
- break;
- case SWITCH_CMD_LIST_PORT:
- alist = &dev->attr_port;
- def_list = default_port;
- def_active = &dev->def_port;
- n_def = ARRAY_SIZE(default_port);
- break;
- default:
- WARN_ON(1);
- goto out;
- }
- memset(&cb, 0, sizeof(cb));
- cb.info = info;
- cb.fill = swconfig_dump_attr;
- for (i = 0; i < alist->n_attr; i++) {
- if (alist->attr[i].disabled)
- continue;
- cb.args[0] = i;
- err = swconfig_send_multipart(&cb, &alist->attr[i]);
- if (err < 0)
- goto error;
- }
- /* defaults */
- for (i = 0; i < n_def; i++) {
- if (!test_bit(i, def_active))
- continue;
- cb.args[0] = SWITCH_ATTR_DEFAULTS_OFFSET + i;
- err = swconfig_send_multipart(&cb, &def_list[i]);
- if (err < 0)
- goto error;
- }
- swconfig_put_dev(dev);
- if (!cb.msg)
- return 0;
- return genlmsg_unicast(cb.msg, info->snd_pid);
- error:
- if (cb.msg)
- nlmsg_free(cb.msg);
- out:
- swconfig_put_dev(dev);
- return err;
- }
- static struct switch_attr *
- swconfig_lookup_attr(struct switch_dev *dev, struct genl_info *info,
- struct switch_val *val)
- {
- struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
- const struct switch_attrlist *alist;
- struct switch_attr *attr = NULL;
- int attr_id;
- /* defaults */
- struct switch_attr *def_list;
- unsigned long *def_active;
- int n_def;
- if (!info->attrs[SWITCH_ATTR_OP_ID])
- goto done;
- switch(hdr->cmd) {
- case SWITCH_CMD_SET_GLOBAL:
- case SWITCH_CMD_GET_GLOBAL:
- alist = &dev->attr_global;
- def_list = default_global;
- def_active = &dev->def_global;
- n_def = ARRAY_SIZE(default_global);
- break;
- case SWITCH_CMD_SET_VLAN:
- case SWITCH_CMD_GET_VLAN:
- alist = &dev->attr_vlan;
- def_list = default_vlan;
- def_active = &dev->def_vlan;
- n_def = ARRAY_SIZE(default_vlan);
- if (!info->attrs[SWITCH_ATTR_OP_VLAN])
- goto done;
- val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_VLAN]);
- break;
- case SWITCH_CMD_SET_PORT:
- case SWITCH_CMD_GET_PORT:
- alist = &dev->attr_port;
- def_list = default_port;
- def_active = &dev->def_port;
- n_def = ARRAY_SIZE(default_port);
- if (!info->attrs[SWITCH_ATTR_OP_PORT])
- goto done;
- val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_PORT]);
- break;
- default:
- WARN_ON(1);
- goto done;
- }
- if (!alist)
- goto done;
- attr_id = nla_get_u32(info->attrs[SWITCH_ATTR_OP_ID]);
- if (attr_id >= SWITCH_ATTR_DEFAULTS_OFFSET) {
- attr_id -= SWITCH_ATTR_DEFAULTS_OFFSET;
- if (attr_id >= n_def)
- goto done;
- if (!test_bit(attr_id, def_active))
- goto done;
- attr = &def_list[attr_id];
- } else {
- if (attr_id >= alist->n_attr)
- goto done;
- attr = &alist->attr[attr_id];
- }
- if (attr->disabled)
- attr = NULL;
- done:
- if (!attr)
- DPRINTF("attribute lookup failed\n");
- val->attr = attr;
- return attr;
- }
- static int
- swconfig_parse_ports(struct sk_buff *msg, struct nlattr *head,
- struct switch_val *val, int max)
- {
- struct nlattr *nla;
- int rem;
- val->len = 0;
- nla_for_each_nested(nla, head, rem) {
- struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1];
- struct switch_port *port = &val->value.ports[val->len];
- if (val->len >= max)
- return -EINVAL;
- if (nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, nla,
- port_policy))
- return -EINVAL;
- if (!tb[SWITCH_PORT_ID])
- return -EINVAL;
- port->id = nla_get_u32(tb[SWITCH_PORT_ID]);
- if (tb[SWITCH_PORT_FLAG_TAGGED])
- port->flags |= (1 << SWITCH_PORT_FLAG_TAGGED);
- val->len++;
- }
- return 0;
- }
- static int
- swconfig_set_attr(struct sk_buff *skb, struct genl_info *info)
- {
- struct switch_attr *attr;
- struct switch_dev *dev;
- struct switch_val val;
- int err = -EINVAL;
- dev = swconfig_get_dev(info);
- if (!dev)
- return -EINVAL;
- memset(&val, 0, sizeof(val));
- attr = swconfig_lookup_attr(dev, info, &val);
- if (!attr || !attr->set)
- goto error;
- val.attr = attr;
- switch(attr->type) {
- case SWITCH_TYPE_NOVAL:
- break;
- case SWITCH_TYPE_INT:
- if (!info->attrs[SWITCH_ATTR_OP_VALUE_INT])
- goto error;
- val.value.i =
- nla_get_u32(info->attrs[SWITCH_ATTR_OP_VALUE_INT]);
- break;
- case SWITCH_TYPE_STRING:
- if (!info->attrs[SWITCH_ATTR_OP_VALUE_STR])
- goto error;
- val.value.s =
- nla_data(info->attrs[SWITCH_ATTR_OP_VALUE_STR]);
- break;
- case SWITCH_TYPE_PORTS:
- val.value.ports = dev->portbuf;
- memset(dev->portbuf, 0,
- sizeof(struct switch_port) * dev->ports);
- /* TODO: implement multipart? */
- if (info->attrs[SWITCH_ATTR_OP_VALUE_PORTS]) {
- err = swconfig_parse_ports(skb,
- info->attrs[SWITCH_ATTR_OP_VALUE_PORTS], &val, dev->ports);
- if (err < 0)
- goto error;
- } else {
- val.len = 0;
- err = 0;
- }
- break;
- default:
- goto error;
- }
- err = attr->set(dev, attr, &val);
- error:
- swconfig_put_dev(dev);
- return err;
- }
- static int
- swconfig_close_portlist(struct swconfig_callback *cb, void *arg)
- {
- if (cb->nest[0])
- nla_nest_end(cb->msg, cb->nest[0]);
- return 0;
- }
- static int
- swconfig_send_port(struct swconfig_callback *cb, void *arg)
- {
- const struct switch_port *port = arg;
- struct nlattr *p = NULL;
- if (!cb->nest[0]) {
- cb->nest[0] = nla_nest_start(cb->msg, cb->cmd);
- if (!cb->nest[0])
- return -1;
- }
- p = nla_nest_start(cb->msg, SWITCH_ATTR_PORT);
- if (!p)
- goto error;
- NLA_PUT_U32(cb->msg, SWITCH_PORT_ID, port->id);
- if (port->flags & (1 << SWITCH_PORT_FLAG_TAGGED))
- NLA_PUT_FLAG(cb->msg, SWITCH_PORT_FLAG_TAGGED);
- nla_nest_end(cb->msg, p);
- return 0;
- nla_put_failure:
- nla_nest_cancel(cb->msg, p);
- error:
- nla_nest_cancel(cb->msg, cb->nest[0]);
- return -1;
- }
- static int
- swconfig_send_ports(struct sk_buff **msg, struct genl_info *info, int attr,
- const struct switch_val *val)
- {
- struct swconfig_callback cb;
- int err = 0;
- int i;
- if (!val->value.ports)
- return -EINVAL;
- memset(&cb, 0, sizeof(cb));
- cb.cmd = attr;
- cb.msg = *msg;
- cb.info = info;
- cb.fill = swconfig_send_port;
- cb.close = swconfig_close_portlist;
- cb.nest[0] = nla_nest_start(cb.msg, cb.cmd);
- for (i = 0; i < val->len; i++) {
- err = swconfig_send_multipart(&cb, &val->value.ports[i]);
- if (err)
- goto done;
- }
- err = val->len;
- swconfig_close_portlist(&cb, NULL);
- *msg = cb.msg;
- done:
- return err;
- }
- static int
- swconfig_get_attr(struct sk_buff *skb, struct genl_info *info)
- {
- struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
- struct switch_attr *attr;
- struct switch_dev *dev;
- struct sk_buff *msg = NULL;
- struct switch_val val;
- int err = -EINVAL;
- int cmd = hdr->cmd;
- dev = swconfig_get_dev(info);
- if (!dev)
- return -EINVAL;
- memset(&val, 0, sizeof(val));
- attr = swconfig_lookup_attr(dev, info, &val);
- if (!attr || !attr->get)
- goto error_dev;
- if (attr->type == SWITCH_TYPE_PORTS) {
- val.value.ports = dev->portbuf;
- memset(dev->portbuf, 0,
- sizeof(struct switch_port) * dev->ports);
- }
- err = attr->get(dev, attr, &val);
- if (err)
- goto error;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
- if (!msg)
- goto error;
- hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, &switch_fam,
- 0, cmd);
- if (IS_ERR(hdr))
- goto nla_put_failure;
- switch(attr->type) {
- case SWITCH_TYPE_INT:
- NLA_PUT_U32(msg, SWITCH_ATTR_OP_VALUE_INT, val.value.i);
- break;
- case SWITCH_TYPE_STRING:
- NLA_PUT_STRING(msg, SWITCH_ATTR_OP_VALUE_STR, val.value.s);
- break;
- case SWITCH_TYPE_PORTS:
- err = swconfig_send_ports(&msg, info,
- SWITCH_ATTR_OP_VALUE_PORTS, &val);
- if (err < 0)
- goto nla_put_failure;
- break;
- default:
- DPRINTF("invalid type in attribute\n");
- err = -EINVAL;
- goto error;
- }
- err = genlmsg_end(msg, hdr);
- if (err < 0)
- goto nla_put_failure;
- swconfig_put_dev(dev);
- return genlmsg_unicast(msg, info->snd_pid);
- nla_put_failure:
- if (msg)
- nlmsg_free(msg);
- error_dev:
- swconfig_put_dev(dev);
- error:
- if (!err)
- err = -ENOMEM;
- return err;
- }
- static int
- swconfig_send_switch(struct sk_buff *msg, u32 pid, u32 seq, int flags,
- const struct switch_dev *dev)
- {
- void *hdr;
- hdr = genlmsg_put(msg, pid, seq, &switch_fam, flags,
- SWITCH_CMD_NEW_ATTR);
- if (IS_ERR(hdr))
- return -1;
- NLA_PUT_U32(msg, SWITCH_ATTR_ID, dev->id);
- NLA_PUT_STRING(msg, SWITCH_ATTR_NAME, dev->name);
- NLA_PUT_STRING(msg, SWITCH_ATTR_DEV_NAME, dev->devname);
- NLA_PUT_U32(msg, SWITCH_ATTR_VLANS, dev->vlans);
- NLA_PUT_U32(msg, SWITCH_ATTR_PORTS, dev->ports);
- return genlmsg_end(msg, hdr);
- nla_put_failure:
- genlmsg_cancel(msg, hdr);
- return -EMSGSIZE;
- }
- static int swconfig_dump_switches(struct sk_buff *skb,
- struct netlink_callback *cb)
- {
- struct switch_dev *dev;
- int start = cb->args[0];
- int idx = 0;
- swconfig_lock();
- list_for_each_entry(dev, &swdevs, dev_list) {
- if (++idx <= start)
- continue;
- if (swconfig_send_switch(skb, NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq, NLM_F_MULTI,
- dev) < 0)
- break;
- }
- swconfig_unlock();
- cb->args[0] = idx;
- return skb->len;
- }
- static int
- swconfig_done(struct netlink_callback *cb)
- {
- return 0;
- }
- static struct genl_ops swconfig_ops[] = {
- {
- .cmd = SWITCH_CMD_LIST_GLOBAL,
- .doit = swconfig_list_attrs,
- .policy = switch_policy,
- },
- {
- .cmd = SWITCH_CMD_LIST_VLAN,
- .doit = swconfig_list_attrs,
- .policy = switch_policy,
- },
- {
- .cmd = SWITCH_CMD_LIST_PORT,
- .doit = swconfig_list_attrs,
- .policy = switch_policy,
- },
- {
- .cmd = SWITCH_CMD_GET_GLOBAL,
- .doit = swconfig_get_attr,
- .policy = switch_policy,
- },
- {
- .cmd = SWITCH_CMD_GET_VLAN,
- .doit = swconfig_get_attr,
- .policy = switch_policy,
- },
- {
- .cmd = SWITCH_CMD_GET_PORT,
- .doit = swconfig_get_attr,
- .policy = switch_policy,
- },
- {
- .cmd = SWITCH_CMD_SET_GLOBAL,
- .doit = swconfig_set_attr,
- .policy = switch_policy,
- },
- {
- .cmd = SWITCH_CMD_SET_VLAN,
- .doit = swconfig_set_attr,
- .policy = switch_policy,
- },
- {
- .cmd = SWITCH_CMD_SET_PORT,
- .doit = swconfig_set_attr,
- .policy = switch_policy,
- },
- {
- .cmd = SWITCH_CMD_GET_SWITCH,
- .dumpit = swconfig_dump_switches,
- .policy = switch_policy,
- .done = swconfig_done,
- }
- };
- int
- register_switch(struct switch_dev *dev, struct net_device *netdev)
- {
- INIT_LIST_HEAD(&dev->dev_list);
- if (netdev) {
- dev->netdev = netdev;
- if (!dev->devname)
- dev->devname = netdev->name;
- }
- BUG_ON(!dev->devname);
- if (dev->ports > 0) {
- dev->portbuf = kzalloc(sizeof(struct switch_port) * dev->ports,
- GFP_KERNEL);
- if (!dev->portbuf)
- return -ENOMEM;
- }
- dev->id = ++swdev_id;
- swconfig_defaults_init(dev);
- spin_lock_init(&dev->lock);
- swconfig_lock();
- list_add(&dev->dev_list, &swdevs);
- swconfig_unlock();
- return 0;
- }
- EXPORT_SYMBOL_GPL(register_switch);
- void
- unregister_switch(struct switch_dev *dev)
- {
- kfree(dev->portbuf);
- spin_lock(&dev->lock);
- swconfig_lock();
- list_del(&dev->dev_list);
- swconfig_unlock();
- }
- EXPORT_SYMBOL_GPL(unregister_switch);
- static int __init
- swconfig_init(void)
- {
- int i, err;
- INIT_LIST_HEAD(&swdevs);
- err = genl_register_family(&switch_fam);
- if (err)
- return err;
- for (i = 0; i < ARRAY_SIZE(swconfig_ops); i++) {
- err = genl_register_ops(&switch_fam, &swconfig_ops[i]);
- if (err)
- goto unregister;
- }
- return 0;
- unregister:
- genl_unregister_family(&switch_fam);
- return err;
- }
- static void __exit
- swconfig_exit(void)
- {
- genl_unregister_family(&switch_fam);
- }
- module_init(swconfig_init);
- module_exit(swconfig_exit);
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