rtnetlink.c (7bf2357524408b97fec58344caf7397f8140c3fd) rtnetlink.c (d40156aa5ecbd51fed932ed4813df82b56e5ff4d)
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>

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536 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
537 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
538 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
539 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
540 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
541 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
542};
543
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>

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536 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
537 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
538 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
539 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
540 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
541 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
542};
543
544void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
545{
546 struct rtattr *rta;
547 int size = RTA_LENGTH(attrlen);
548
549 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
550 rta->rta_type = attrtype;
551 rta->rta_len = size;
552 memcpy(RTA_DATA(rta), data, attrlen);
553 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
554}
555EXPORT_SYMBOL(__rta_fill);
556
557int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
558{
559 struct sock *rtnl = net->rtnl;
560 int err = 0;
561
562 NETLINK_CB(skb).dst_group = group;
563 if (echo)
564 atomic_inc(&skb->users);

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623
624nla_put_failure:
625 nla_nest_cancel(skb, mx);
626 return -EMSGSIZE;
627}
628EXPORT_SYMBOL(rtnetlink_put_metrics);
629
630int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
544int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
545{
546 struct sock *rtnl = net->rtnl;
547 int err = 0;
548
549 NETLINK_CB(skb).dst_group = group;
550 if (echo)
551 atomic_inc(&skb->users);

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610
611nla_put_failure:
612 nla_nest_cancel(skb, mx);
613 return -EMSGSIZE;
614}
615EXPORT_SYMBOL(rtnetlink_put_metrics);
616
617int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
631 u32 ts, u32 tsage, long expires, u32 error)
618 long expires, u32 error)
632{
633 struct rta_cacheinfo ci = {
634 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
635 .rta_used = dst->__use,
636 .rta_clntref = atomic_read(&(dst->__refcnt)),
637 .rta_error = error,
638 .rta_id = id,
619{
620 struct rta_cacheinfo ci = {
621 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
622 .rta_used = dst->__use,
623 .rta_clntref = atomic_read(&(dst->__refcnt)),
624 .rta_error = error,
625 .rta_id = id,
639 .rta_ts = ts,
640 .rta_tsage = tsage,
641 };
642
643 if (expires)
644 ci.rta_expires = jiffies_to_clock_t(expires);
645
646 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
647}
648EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);

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1373 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1374 dev->addr_len);
1375 err = ops->ndo_set_mac_address(dev, sa);
1376 kfree(sa);
1377 if (err)
1378 goto errout;
1379 send_addr_notify = 1;
1380 modified = 1;
626 };
627
628 if (expires)
629 ci.rta_expires = jiffies_to_clock_t(expires);
630
631 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
632}
633EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);

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1358 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1359 dev->addr_len);
1360 err = ops->ndo_set_mac_address(dev, sa);
1361 kfree(sa);
1362 if (err)
1363 goto errout;
1364 send_addr_notify = 1;
1365 modified = 1;
1381 add_device_randomness(dev->dev_addr, dev->addr_len);
1382 }
1383
1384 if (tb[IFLA_MTU]) {
1385 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1386 if (err < 0)
1387 goto errout;
1388 modified = 1;
1389 }

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1635}
1636EXPORT_SYMBOL(rtnl_configure_link);
1637
1638struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1639 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1640{
1641 int err;
1642 struct net_device *dev;
1366 }
1367
1368 if (tb[IFLA_MTU]) {
1369 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1370 if (err < 0)
1371 goto errout;
1372 modified = 1;
1373 }

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1619}
1620EXPORT_SYMBOL(rtnl_configure_link);
1621
1622struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1623 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1624{
1625 int err;
1626 struct net_device *dev;
1643 unsigned int num_queues = 1;
1627 unsigned int num_tx_queues = 1;
1628 unsigned int num_rx_queues = 1;
1644
1629
1645 if (ops->get_tx_queues) {
1646 err = ops->get_tx_queues(src_net, tb);
1647 if (err < 0)
1648 goto err;
1649 num_queues = err;
1650 }
1630 if (ops->get_num_tx_queues)
1631 num_tx_queues = ops->get_num_tx_queues();
1632 if (ops->get_num_rx_queues)
1633 num_rx_queues = ops->get_num_rx_queues();
1651
1652 err = -ENOMEM;
1634
1635 err = -ENOMEM;
1653 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
1636 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1637 num_tx_queues, num_rx_queues);
1654 if (!dev)
1655 goto err;
1656
1657 dev_net_set(dev, net);
1658 dev->rtnl_link_ops = ops;
1659 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1660
1661 if (tb[IFLA_MTU])

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2185 return err;
2186skip:
2187 *idx += 1;
2188 }
2189 return 0;
2190}
2191
2192/**
1638 if (!dev)
1639 goto err;
1640
1641 dev_net_set(dev, net);
1642 dev->rtnl_link_ops = ops;
1643 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1644
1645 if (tb[IFLA_MTU])

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2169 return err;
2170skip:
2171 *idx += 1;
2172 }
2173 return 0;
2174}
2175
2176/**
2193 * ndo_dflt_fdb_dump: default netdevice operation to dump an FDB table.
2177 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2194 * @nlh: netlink message header
2195 * @dev: netdevice
2196 *
2197 * Default netdevice operation to dump the existing unicast address list.
2198 * Returns zero on success.
2199 */
2200int ndo_dflt_fdb_dump(struct sk_buff *skb,
2201 struct netlink_callback *cb,

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2362static struct notifier_block rtnetlink_dev_notifier = {
2363 .notifier_call = rtnetlink_event,
2364};
2365
2366
2367static int __net_init rtnetlink_net_init(struct net *net)
2368{
2369 struct sock *sk;
2178 * @nlh: netlink message header
2179 * @dev: netdevice
2180 *
2181 * Default netdevice operation to dump the existing unicast address list.
2182 * Returns zero on success.
2183 */
2184int ndo_dflt_fdb_dump(struct sk_buff *skb,
2185 struct netlink_callback *cb,

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2346static struct notifier_block rtnetlink_dev_notifier = {
2347 .notifier_call = rtnetlink_event,
2348};
2349
2350
2351static int __net_init rtnetlink_net_init(struct net *net)
2352{
2353 struct sock *sk;
2370 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
2371 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
2354 struct netlink_kernel_cfg cfg = {
2355 .groups = RTNLGRP_MAX,
2356 .input = rtnetlink_rcv,
2357 .cb_mutex = &rtnl_mutex,
2358 };
2359
2360 sk = netlink_kernel_create(net, NETLINK_ROUTE, THIS_MODULE, &cfg);
2372 if (!sk)
2373 return -ENOMEM;
2374 net->rtnl = sk;
2375 return 0;
2376}
2377
2378static void __net_exit rtnetlink_net_exit(struct net *net)
2379{

--- 41 unchanged lines hidden --- 		2361 if (!sk)
2362 return -ENOMEM;
2363 net->rtnl = sk;
2364 return 0;
2365}
2366
2367static void __net_exit rtnetlink_net_exit(struct net *net)
2368{

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