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- /*
- * INET An implementation of the TCP/IP protocol suite for the LINUX
- * operating system. INET is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * Routing netlink socket interface: protocol independent part.
- *
- * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
- *
- * 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.
- *
- * Fixes:
- * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
- */
- #include <linux/errno.h>
- #include <linux/module.h>
- #include <linux/types.h>
- #include <linux/socket.h>
- #include <linux/kernel.h>
- #include <linux/timer.h>
- #include <linux/string.h>
- #include <linux/sockios.h>
- #include <linux/net.h>
- #include <linux/fcntl.h>
- #include <linux/mm.h>
- #include <linux/slab.h>
- #include <linux/interrupt.h>
- #include <linux/capability.h>
- #include <linux/skbuff.h>
- #include <linux/init.h>
- #include <linux/security.h>
- #include <linux/mutex.h>
- #include <linux/if_addr.h>
- #include <linux/if_bridge.h>
- #include <linux/if_vlan.h>
- #include <linux/pci.h>
- #include <linux/etherdevice.h>
- #include <asm/uaccess.h>
- #include <linux/inet.h>
- #include <linux/netdevice.h>
- #include <net/switchdev.h>
- #include <net/ip.h>
- #include <net/protocol.h>
- #include <net/arp.h>
- #include <net/route.h>
- #include <net/udp.h>
- #include <net/tcp.h>
- #include <net/sock.h>
- #include <net/pkt_sched.h>
- #include <net/fib_rules.h>
- #include <net/rtnetlink.h>
- #include <net/net_namespace.h>
- struct rtnl_link {
- rtnl_doit_func doit;
- rtnl_dumpit_func dumpit;
- rtnl_calcit_func calcit;
- };
- static DEFINE_MUTEX(rtnl_mutex);
- void rtnl_lock(void)
- {
- mutex_lock(&rtnl_mutex);
- }
- EXPORT_SYMBOL(rtnl_lock);
- void __rtnl_unlock(void)
- {
- mutex_unlock(&rtnl_mutex);
- }
- void rtnl_unlock(void)
- {
- /* This fellow will unlock it for us. */
- netdev_run_todo();
- }
- EXPORT_SYMBOL(rtnl_unlock);
- int rtnl_trylock(void)
- {
- return mutex_trylock(&rtnl_mutex);
- }
- EXPORT_SYMBOL(rtnl_trylock);
- int rtnl_is_locked(void)
- {
- return mutex_is_locked(&rtnl_mutex);
- }
- EXPORT_SYMBOL(rtnl_is_locked);
- #ifdef CONFIG_PROVE_LOCKING
- bool lockdep_rtnl_is_held(void)
- {
- return lockdep_is_held(&rtnl_mutex);
- }
- EXPORT_SYMBOL(lockdep_rtnl_is_held);
- #endif /* #ifdef CONFIG_PROVE_LOCKING */
- static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
- static inline int rtm_msgindex(int msgtype)
- {
- int msgindex = msgtype - RTM_BASE;
- /*
- * msgindex < 0 implies someone tried to register a netlink
- * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
- * the message type has not been added to linux/rtnetlink.h
- */
- BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
- return msgindex;
- }
- static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
- {
- struct rtnl_link *tab;
- if (protocol <= RTNL_FAMILY_MAX)
- tab = rtnl_msg_handlers[protocol];
- else
- tab = NULL;
- if (tab == NULL || tab[msgindex].doit == NULL)
- tab = rtnl_msg_handlers[PF_UNSPEC];
- return tab[msgindex].doit;
- }
- static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
- {
- struct rtnl_link *tab;
- if (protocol <= RTNL_FAMILY_MAX)
- tab = rtnl_msg_handlers[protocol];
- else
- tab = NULL;
- if (tab == NULL || tab[msgindex].dumpit == NULL)
- tab = rtnl_msg_handlers[PF_UNSPEC];
- return tab[msgindex].dumpit;
- }
- static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
- {
- struct rtnl_link *tab;
- if (protocol <= RTNL_FAMILY_MAX)
- tab = rtnl_msg_handlers[protocol];
- else
- tab = NULL;
- if (tab == NULL || tab[msgindex].calcit == NULL)
- tab = rtnl_msg_handlers[PF_UNSPEC];
- return tab[msgindex].calcit;
- }
- /**
- * __rtnl_register - Register a rtnetlink message type
- * @protocol: Protocol family or PF_UNSPEC
- * @msgtype: rtnetlink message type
- * @doit: Function pointer called for each request message
- * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
- * @calcit: Function pointer to calc size of dump message
- *
- * Registers the specified function pointers (at least one of them has
- * to be non-NULL) to be called whenever a request message for the
- * specified protocol family and message type is received.
- *
- * The special protocol family PF_UNSPEC may be used to define fallback
- * function pointers for the case when no entry for the specific protocol
- * family exists.
- *
- * Returns 0 on success or a negative error code.
- */
- int __rtnl_register(int protocol, int msgtype,
- rtnl_doit_func doit, rtnl_dumpit_func dumpit,
- rtnl_calcit_func calcit)
- {
- struct rtnl_link *tab;
- int msgindex;
- BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
- msgindex = rtm_msgindex(msgtype);
- tab = rtnl_msg_handlers[protocol];
- if (tab == NULL) {
- tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
- if (tab == NULL)
- return -ENOBUFS;
- rtnl_msg_handlers[protocol] = tab;
- }
- if (doit)
- tab[msgindex].doit = doit;
- if (dumpit)
- tab[msgindex].dumpit = dumpit;
- if (calcit)
- tab[msgindex].calcit = calcit;
- return 0;
- }
- EXPORT_SYMBOL_GPL(__rtnl_register);
- /**
- * rtnl_register - Register a rtnetlink message type
- *
- * Identical to __rtnl_register() but panics on failure. This is useful
- * as failure of this function is very unlikely, it can only happen due
- * to lack of memory when allocating the chain to store all message
- * handlers for a protocol. Meant for use in init functions where lack
- * of memory implies no sense in continuing.
- */
- void rtnl_register(int protocol, int msgtype,
- rtnl_doit_func doit, rtnl_dumpit_func dumpit,
- rtnl_calcit_func calcit)
- {
- if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
- panic("Unable to register rtnetlink message handler, "
- "protocol = %d, message type = %d\n",
- protocol, msgtype);
- }
- EXPORT_SYMBOL_GPL(rtnl_register);
- /**
- * rtnl_unregister - Unregister a rtnetlink message type
- * @protocol: Protocol family or PF_UNSPEC
- * @msgtype: rtnetlink message type
- *
- * Returns 0 on success or a negative error code.
- */
- int rtnl_unregister(int protocol, int msgtype)
- {
- int msgindex;
- BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
- msgindex = rtm_msgindex(msgtype);
- if (rtnl_msg_handlers[protocol] == NULL)
- return -ENOENT;
- rtnl_msg_handlers[protocol][msgindex].doit = NULL;
- rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
- return 0;
- }
- EXPORT_SYMBOL_GPL(rtnl_unregister);
- /**
- * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
- * @protocol : Protocol family or PF_UNSPEC
- *
- * Identical to calling rtnl_unregster() for all registered message types
- * of a certain protocol family.
- */
- void rtnl_unregister_all(int protocol)
- {
- BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
- kfree(rtnl_msg_handlers[protocol]);
- rtnl_msg_handlers[protocol] = NULL;
- }
- EXPORT_SYMBOL_GPL(rtnl_unregister_all);
- static LIST_HEAD(link_ops);
- static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
- {
- const struct rtnl_link_ops *ops;
- list_for_each_entry(ops, &link_ops, list) {
- if (!strcmp(ops->kind, kind))
- return ops;
- }
- return NULL;
- }
- /**
- * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
- * @ops: struct rtnl_link_ops * to register
- *
- * The caller must hold the rtnl_mutex. This function should be used
- * by drivers that create devices during module initialization. It
- * must be called before registering the devices.
- *
- * Returns 0 on success or a negative error code.
- */
- int __rtnl_link_register(struct rtnl_link_ops *ops)
- {
- if (rtnl_link_ops_get(ops->kind))
- return -EEXIST;
- /* The check for setup is here because if ops
- * does not have that filled up, it is not possible
- * to use the ops for creating device. So do not
- * fill up dellink as well. That disables rtnl_dellink.
- */
- if (ops->setup && !ops->dellink)
- ops->dellink = unregister_netdevice_queue;
- list_add_tail(&ops->list, &link_ops);
- return 0;
- }
- EXPORT_SYMBOL_GPL(__rtnl_link_register);
- /**
- * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
- * @ops: struct rtnl_link_ops * to register
- *
- * Returns 0 on success or a negative error code.
- */
- int rtnl_link_register(struct rtnl_link_ops *ops)
- {
- int err;
- rtnl_lock();
- err = __rtnl_link_register(ops);
- rtnl_unlock();
- return err;
- }
- EXPORT_SYMBOL_GPL(rtnl_link_register);
- static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
- {
- struct net_device *dev;
- LIST_HEAD(list_kill);
- for_each_netdev(net, dev) {
- if (dev->rtnl_link_ops == ops)
- ops->dellink(dev, &list_kill);
- }
- unregister_netdevice_many(&list_kill);
- }
- /**
- * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
- * @ops: struct rtnl_link_ops * to unregister
- *
- * The caller must hold the rtnl_mutex.
- */
- void __rtnl_link_unregister(struct rtnl_link_ops *ops)
- {
- struct net *net;
- for_each_net(net) {
- __rtnl_kill_links(net, ops);
- }
- list_del(&ops->list);
- }
- EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
- /* Return with the rtnl_lock held when there are no network
- * devices unregistering in any network namespace.
- */
- static void rtnl_lock_unregistering_all(void)
- {
- struct net *net;
- bool unregistering;
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
- add_wait_queue(&netdev_unregistering_wq, &wait);
- for (;;) {
- unregistering = false;
- rtnl_lock();
- for_each_net(net) {
- if (net->dev_unreg_count > 0) {
- unregistering = true;
- break;
- }
- }
- if (!unregistering)
- break;
- __rtnl_unlock();
- wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
- }
- remove_wait_queue(&netdev_unregistering_wq, &wait);
- }
- /**
- * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
- * @ops: struct rtnl_link_ops * to unregister
- */
- void rtnl_link_unregister(struct rtnl_link_ops *ops)
- {
- /* Close the race with cleanup_net() */
- mutex_lock(&net_mutex);
- rtnl_lock_unregistering_all();
- __rtnl_link_unregister(ops);
- rtnl_unlock();
- mutex_unlock(&net_mutex);
- }
- EXPORT_SYMBOL_GPL(rtnl_link_unregister);
- static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
- {
- struct net_device *master_dev;
- const struct rtnl_link_ops *ops;
- master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
- if (!master_dev)
- return 0;
- ops = master_dev->rtnl_link_ops;
- if (!ops || !ops->get_slave_size)
- return 0;
- /* IFLA_INFO_SLAVE_DATA + nested data */
- return nla_total_size(sizeof(struct nlattr)) +
- ops->get_slave_size(master_dev, dev);
- }
- static size_t rtnl_link_get_size(const struct net_device *dev)
- {
- const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
- size_t size;
- if (!ops)
- return 0;
- size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
- nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
- if (ops->get_size)
- /* IFLA_INFO_DATA + nested data */
- size += nla_total_size(sizeof(struct nlattr)) +
- ops->get_size(dev);
- if (ops->get_xstats_size)
- /* IFLA_INFO_XSTATS */
- size += nla_total_size(ops->get_xstats_size(dev));
- size += rtnl_link_get_slave_info_data_size(dev);
- return size;
- }
- static LIST_HEAD(rtnl_af_ops);
- static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
- {
- const struct rtnl_af_ops *ops;
- list_for_each_entry(ops, &rtnl_af_ops, list) {
- if (ops->family == family)
- return ops;
- }
- return NULL;
- }
- /**
- * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
- * @ops: struct rtnl_af_ops * to register
- *
- * Returns 0 on success or a negative error code.
- */
- void rtnl_af_register(struct rtnl_af_ops *ops)
- {
- rtnl_lock();
- list_add_tail(&ops->list, &rtnl_af_ops);
- rtnl_unlock();
- }
- EXPORT_SYMBOL_GPL(rtnl_af_register);
- /**
- * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
- * @ops: struct rtnl_af_ops * to unregister
- *
- * The caller must hold the rtnl_mutex.
- */
- void __rtnl_af_unregister(struct rtnl_af_ops *ops)
- {
- list_del(&ops->list);
- }
- EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
- /**
- * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
- * @ops: struct rtnl_af_ops * to unregister
- */
- void rtnl_af_unregister(struct rtnl_af_ops *ops)
- {
- rtnl_lock();
- __rtnl_af_unregister(ops);
- rtnl_unlock();
- }
- EXPORT_SYMBOL_GPL(rtnl_af_unregister);
- static size_t rtnl_link_get_af_size(const struct net_device *dev,
- u32 ext_filter_mask)
- {
- struct rtnl_af_ops *af_ops;
- size_t size;
- /* IFLA_AF_SPEC */
- size = nla_total_size(sizeof(struct nlattr));
- list_for_each_entry(af_ops, &rtnl_af_ops, list) {
- if (af_ops->get_link_af_size) {
- /* AF_* + nested data */
- size += nla_total_size(sizeof(struct nlattr)) +
- af_ops->get_link_af_size(dev, ext_filter_mask);
- }
- }
- return size;
- }
- static bool rtnl_have_link_slave_info(const struct net_device *dev)
- {
- struct net_device *master_dev;
- master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
- if (master_dev && master_dev->rtnl_link_ops)
- return true;
- return false;
- }
- static int rtnl_link_slave_info_fill(struct sk_buff *skb,
- const struct net_device *dev)
- {
- struct net_device *master_dev;
- const struct rtnl_link_ops *ops;
- struct nlattr *slave_data;
- int err;
- master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
- if (!master_dev)
- return 0;
- ops = master_dev->rtnl_link_ops;
- if (!ops)
- return 0;
- if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
- return -EMSGSIZE;
- if (ops->fill_slave_info) {
- slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
- if (!slave_data)
- return -EMSGSIZE;
- err = ops->fill_slave_info(skb, master_dev, dev);
- if (err < 0)
- goto err_cancel_slave_data;
- nla_nest_end(skb, slave_data);
- }
- return 0;
- err_cancel_slave_data:
- nla_nest_cancel(skb, slave_data);
- return err;
- }
- static int rtnl_link_info_fill(struct sk_buff *skb,
- const struct net_device *dev)
- {
- const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
- struct nlattr *data;
- int err;
- if (!ops)
- return 0;
- if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
- return -EMSGSIZE;
- if (ops->fill_xstats) {
- err = ops->fill_xstats(skb, dev);
- if (err < 0)
- return err;
- }
- if (ops->fill_info) {
- data = nla_nest_start(skb, IFLA_INFO_DATA);
- if (data == NULL)
- return -EMSGSIZE;
- err = ops->fill_info(skb, dev);
- if (err < 0)
- goto err_cancel_data;
- nla_nest_end(skb, data);
- }
- return 0;
- err_cancel_data:
- nla_nest_cancel(skb, data);
- return err;
- }
- static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
- {
- struct nlattr *linkinfo;
- int err = -EMSGSIZE;
- linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
- if (linkinfo == NULL)
- goto out;
- err = rtnl_link_info_fill(skb, dev);
- if (err < 0)
- goto err_cancel_link;
- err = rtnl_link_slave_info_fill(skb, dev);
- if (err < 0)
- goto err_cancel_link;
- nla_nest_end(skb, linkinfo);
- return 0;
- err_cancel_link:
- nla_nest_cancel(skb, linkinfo);
- out:
- return err;
- }
- int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
- {
- struct sock *rtnl = net->rtnl;
- int err = 0;
- NETLINK_CB(skb).dst_group = group;
- if (echo)
- atomic_inc(&skb->users);
- netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
- if (echo)
- err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
- return err;
- }
- int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
- {
- struct sock *rtnl = net->rtnl;
- return nlmsg_unicast(rtnl, skb, pid);
- }
- EXPORT_SYMBOL(rtnl_unicast);
- void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
- struct nlmsghdr *nlh, gfp_t flags)
- {
- struct sock *rtnl = net->rtnl;
- int report = 0;
- if (nlh)
- report = nlmsg_report(nlh);
- nlmsg_notify(rtnl, skb, pid, group, report, flags);
- }
- EXPORT_SYMBOL(rtnl_notify);
- void rtnl_set_sk_err(struct net *net, u32 group, int error)
- {
- struct sock *rtnl = net->rtnl;
- netlink_set_err(rtnl, 0, group, error);
- }
- EXPORT_SYMBOL(rtnl_set_sk_err);
- int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
- {
- struct nlattr *mx;
- int i, valid = 0;
- mx = nla_nest_start(skb, RTA_METRICS);
- if (mx == NULL)
- return -ENOBUFS;
- for (i = 0; i < RTAX_MAX; i++) {
- if (metrics[i]) {
- if (i == RTAX_CC_ALGO - 1) {
- char tmp[TCP_CA_NAME_MAX], *name;
- name = tcp_ca_get_name_by_key(metrics[i], tmp);
- if (!name)
- continue;
- if (nla_put_string(skb, i + 1, name))
- goto nla_put_failure;
- } else if (i == RTAX_FEATURES - 1) {
- u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
- BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
- if (nla_put_u32(skb, i + 1, user_features))
- goto nla_put_failure;
- } else {
- if (nla_put_u32(skb, i + 1, metrics[i]))
- goto nla_put_failure;
- }
- valid++;
- }
- }
- if (!valid) {
- nla_nest_cancel(skb, mx);
- return 0;
- }
- return nla_nest_end(skb, mx);
- nla_put_failure:
- nla_nest_cancel(skb, mx);
- return -EMSGSIZE;
- }
- EXPORT_SYMBOL(rtnetlink_put_metrics);
- int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
- long expires, u32 error)
- {
- struct rta_cacheinfo ci = {
- .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
- .rta_used = dst->__use,
- .rta_clntref = atomic_read(&(dst->__refcnt)),
- .rta_error = error,
- .rta_id = id,
- };
- if (expires) {
- unsigned long clock;
- clock = jiffies_to_clock_t(abs(expires));
- clock = min_t(unsigned long, clock, INT_MAX);
- ci.rta_expires = (expires > 0) ? clock : -clock;
- }
- return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
- }
- EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
- static void set_operstate(struct net_device *dev, unsigned char transition)
- {
- unsigned char operstate = dev->operstate;
- switch (transition) {
- case IF_OPER_UP:
- if ((operstate == IF_OPER_DORMANT ||
- operstate == IF_OPER_UNKNOWN) &&
- !netif_dormant(dev))
- operstate = IF_OPER_UP;
- break;
- case IF_OPER_DORMANT:
- if (operstate == IF_OPER_UP ||
- operstate == IF_OPER_UNKNOWN)
- operstate = IF_OPER_DORMANT;
- break;
- }
- if (dev->operstate != operstate) {
- write_lock_bh(&dev_base_lock);
- dev->operstate = operstate;
- write_unlock_bh(&dev_base_lock);
- netdev_state_change(dev);
- }
- }
- static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
- {
- return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
- (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
- }
- static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
- const struct ifinfomsg *ifm)
- {
- unsigned int flags = ifm->ifi_flags;
- /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
- if (ifm->ifi_change)
- flags = (flags & ifm->ifi_change) |
- (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
- return flags;
- }
- static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
- const struct rtnl_link_stats64 *b)
- {
- a->rx_packets = b->rx_packets;
- a->tx_packets = b->tx_packets;
- a->rx_bytes = b->rx_bytes;
- a->tx_bytes = b->tx_bytes;
- a->rx_errors = b->rx_errors;
- a->tx_errors = b->tx_errors;
- a->rx_dropped = b->rx_dropped;
- a->tx_dropped = b->tx_dropped;
- a->multicast = b->multicast;
- a->collisions = b->collisions;
- a->rx_length_errors = b->rx_length_errors;
- a->rx_over_errors = b->rx_over_errors;
- a->rx_crc_errors = b->rx_crc_errors;
- a->rx_frame_errors = b->rx_frame_errors;
- a->rx_fifo_errors = b->rx_fifo_errors;
- a->rx_missed_errors = b->rx_missed_errors;
- a->tx_aborted_errors = b->tx_aborted_errors;
- a->tx_carrier_errors = b->tx_carrier_errors;
- a->tx_fifo_errors = b->tx_fifo_errors;
- a->tx_heartbeat_errors = b->tx_heartbeat_errors;
- a->tx_window_errors = b->tx_window_errors;
- a->rx_compressed = b->rx_compressed;
- a->tx_compressed = b->tx_compressed;
- }
- static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
- {
- memcpy(v, b, sizeof(*b));
- }
- /* All VF info */
- static inline int rtnl_vfinfo_size(const struct net_device *dev,
- u32 ext_filter_mask)
- {
- if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
- (ext_filter_mask & RTEXT_FILTER_VF)) {
- int num_vfs = dev_num_vf(dev->dev.parent);
- size_t size = nla_total_size(sizeof(struct nlattr));
- size += nla_total_size(num_vfs * sizeof(struct nlattr));
- size += num_vfs *
- (nla_total_size(sizeof(struct ifla_vf_mac)) +
- nla_total_size(sizeof(struct ifla_vf_vlan)) +
- nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
- nla_total_size(sizeof(struct ifla_vf_rate)) +
- nla_total_size(sizeof(struct ifla_vf_link_state)) +
- nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
- /* IFLA_VF_STATS_RX_PACKETS */
- nla_total_size(sizeof(__u64)) +
- /* IFLA_VF_STATS_TX_PACKETS */
- nla_total_size(sizeof(__u64)) +
- /* IFLA_VF_STATS_RX_BYTES */
- nla_total_size(sizeof(__u64)) +
- /* IFLA_VF_STATS_TX_BYTES */
- nla_total_size(sizeof(__u64)) +
- /* IFLA_VF_STATS_BROADCAST */
- nla_total_size(sizeof(__u64)) +
- /* IFLA_VF_STATS_MULTICAST */
- nla_total_size(sizeof(__u64)) +
- nla_total_size(sizeof(struct ifla_vf_trust)));
- return size;
- } else
- return 0;
- }
- static size_t rtnl_port_size(const struct net_device *dev,
- u32 ext_filter_mask)
- {
- size_t port_size = nla_total_size(4) /* PORT_VF */
- + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
- + nla_total_size(sizeof(struct ifla_port_vsi))
- /* PORT_VSI_TYPE */
- + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
- + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
- + nla_total_size(1) /* PROT_VDP_REQUEST */
- + nla_total_size(2); /* PORT_VDP_RESPONSE */
- size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
- size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
- + port_size;
- size_t port_self_size = nla_total_size(sizeof(struct nlattr))
- + port_size;
- if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
- !(ext_filter_mask & RTEXT_FILTER_VF))
- return 0;
- if (dev_num_vf(dev->dev.parent))
- return port_self_size + vf_ports_size +
- vf_port_size * dev_num_vf(dev->dev.parent);
- else
- return port_self_size;
- }
- static noinline size_t if_nlmsg_size(const struct net_device *dev,
- u32 ext_filter_mask)
- {
- return NLMSG_ALIGN(sizeof(struct ifinfomsg))
- + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
- + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
- + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
- + nla_total_size(sizeof(struct rtnl_link_ifmap))
- + nla_total_size(sizeof(struct rtnl_link_stats))
- + nla_total_size(sizeof(struct rtnl_link_stats64))
- + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
- + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
- + nla_total_size(4) /* IFLA_TXQLEN */
- + nla_total_size(4) /* IFLA_WEIGHT */
- + nla_total_size(4) /* IFLA_MTU */
- + nla_total_size(4) /* IFLA_LINK */
- + nla_total_size(4) /* IFLA_MASTER */
- + nla_total_size(1) /* IFLA_CARRIER */
- + nla_total_size(4) /* IFLA_PROMISCUITY */
- + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
- + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
- + nla_total_size(1) /* IFLA_OPERSTATE */
- + nla_total_size(1) /* IFLA_LINKMODE */
- + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
- + nla_total_size(4) /* IFLA_LINK_NETNSID */
- + nla_total_size(4) /* IFLA_GROUP */
- + nla_total_size(ext_filter_mask
- & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
- + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
- + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
- + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
- + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
- + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
- + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
- + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
- + nla_total_size(1); /* IFLA_PROTO_DOWN */
- }
- static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
- {
- struct nlattr *vf_ports;
- struct nlattr *vf_port;
- int vf;
- int err;
- vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
- if (!vf_ports)
- return -EMSGSIZE;
- for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
- vf_port = nla_nest_start(skb, IFLA_VF_PORT);
- if (!vf_port)
- goto nla_put_failure;
- if (nla_put_u32(skb, IFLA_PORT_VF, vf))
- goto nla_put_failure;
- err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
- if (err == -EMSGSIZE)
- goto nla_put_failure;
- if (err) {
- nla_nest_cancel(skb, vf_port);
- continue;
- }
- nla_nest_end(skb, vf_port);
- }
- nla_nest_end(skb, vf_ports);
- return 0;
- nla_put_failure:
- nla_nest_cancel(skb, vf_ports);
- return -EMSGSIZE;
- }
- static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
- {
- struct nlattr *port_self;
- int err;
- port_self = nla_nest_start(skb, IFLA_PORT_SELF);
- if (!port_self)
- return -EMSGSIZE;
- err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
- if (err) {
- nla_nest_cancel(skb, port_self);
- return (err == -EMSGSIZE) ? err : 0;
- }
- nla_nest_end(skb, port_self);
- return 0;
- }
- static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
- u32 ext_filter_mask)
- {
- int err;
- if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
- !(ext_filter_mask & RTEXT_FILTER_VF))
- return 0;
- err = rtnl_port_self_fill(skb, dev);
- if (err)
- return err;
- if (dev_num_vf(dev->dev.parent)) {
- err = rtnl_vf_ports_fill(skb, dev);
- if (err)
- return err;
- }
- return 0;
- }
- static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
- {
- int err;
- struct netdev_phys_item_id ppid;
- err = dev_get_phys_port_id(dev, &ppid);
- if (err) {
- if (err == -EOPNOTSUPP)
- return 0;
- return err;
- }
- if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
- return -EMSGSIZE;
- return 0;
- }
- static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
- {
- char name[IFNAMSIZ];
- int err;
- err = dev_get_phys_port_name(dev, name, sizeof(name));
- if (err) {
- if (err == -EOPNOTSUPP)
- return 0;
- return err;
- }
- if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
- return -EMSGSIZE;
- return 0;
- }
- static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
- {
- int err;
- struct switchdev_attr attr = {
- .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
- .flags = SWITCHDEV_F_NO_RECURSE,
- };
- err = switchdev_port_attr_get(dev, &attr);
- if (err) {
- if (err == -EOPNOTSUPP)
- return 0;
- return err;
- }
- if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
- attr.u.ppid.id))
- return -EMSGSIZE;
- return 0;
- }
- static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
- struct net_device *dev)
- {
- const struct rtnl_link_stats64 *stats;
- struct rtnl_link_stats64 temp;
- struct nlattr *attr;
- stats = dev_get_stats(dev, &temp);
- attr = nla_reserve(skb, IFLA_STATS,
- sizeof(struct rtnl_link_stats));
- if (!attr)
- return -EMSGSIZE;
- copy_rtnl_link_stats(nla_data(attr), stats);
- attr = nla_reserve(skb, IFLA_STATS64,
- sizeof(struct rtnl_link_stats64));
- if (!attr)
- return -EMSGSIZE;
- copy_rtnl_link_stats64(nla_data(attr), stats);
- return 0;
- }
- static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
- struct net_device *dev,
- int vfs_num,
- struct nlattr *vfinfo)
- {
- struct ifla_vf_rss_query_en vf_rss_query_en;
- struct ifla_vf_link_state vf_linkstate;
- struct ifla_vf_spoofchk vf_spoofchk;
- struct ifla_vf_tx_rate vf_tx_rate;
- struct ifla_vf_stats vf_stats;
- struct ifla_vf_trust vf_trust;
- struct ifla_vf_vlan vf_vlan;
- struct ifla_vf_rate vf_rate;
- struct nlattr *vf, *vfstats;
- struct ifla_vf_mac vf_mac;
- struct ifla_vf_info ivi;
- memset(&ivi, 0, sizeof(ivi));
- /* Not all SR-IOV capable drivers support the
- * spoofcheck and "RSS query enable" query. Preset to
- * -1 so the user space tool can detect that the driver
- * didn't report anything.
- */
- ivi.spoofchk = -1;
- ivi.rss_query_en = -1;
- ivi.trusted = -1;
- /* The default value for VF link state is "auto"
- * IFLA_VF_LINK_STATE_AUTO which equals zero
- */
- ivi.linkstate = 0;
- if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
- return 0;
- vf_mac.vf =
- vf_vlan.vf =
- vf_rate.vf =
- vf_tx_rate.vf =
- vf_spoofchk.vf =
- vf_linkstate.vf =
- vf_rss_query_en.vf =
- vf_trust.vf = ivi.vf;
- memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
- vf_vlan.vlan = ivi.vlan;
- vf_vlan.qos = ivi.qos;
- vf_tx_rate.rate = ivi.max_tx_rate;
- vf_rate.min_tx_rate = ivi.min_tx_rate;
- vf_rate.max_tx_rate = ivi.max_tx_rate;
- vf_spoofchk.setting = ivi.spoofchk;
- vf_linkstate.link_state = ivi.linkstate;
- vf_rss_query_en.setting = ivi.rss_query_en;
- vf_trust.setting = ivi.trusted;
- vf = nla_nest_start(skb, IFLA_VF_INFO);
- if (!vf) {
- nla_nest_cancel(skb, vfinfo);
- return -EMSGSIZE;
- }
- if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
- nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
- nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
- &vf_rate) ||
- nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
- &vf_tx_rate) ||
- nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
- &vf_spoofchk) ||
- nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
- &vf_linkstate) ||
- nla_put(skb, IFLA_VF_RSS_QUERY_EN,
- sizeof(vf_rss_query_en),
- &vf_rss_query_en) ||
- nla_put(skb, IFLA_VF_TRUST,
- sizeof(vf_trust), &vf_trust))
- return -EMSGSIZE;
- memset(&vf_stats, 0, sizeof(vf_stats));
- if (dev->netdev_ops->ndo_get_vf_stats)
- dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
- &vf_stats);
- vfstats = nla_nest_start(skb, IFLA_VF_STATS);
- if (!vfstats) {
- nla_nest_cancel(skb, vf);
- nla_nest_cancel(skb, vfinfo);
- return -EMSGSIZE;
- }
- if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
- vf_stats.rx_packets) ||
- nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
- vf_stats.tx_packets) ||
- nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
- vf_stats.rx_bytes) ||
- nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
- vf_stats.tx_bytes) ||
- nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
- vf_stats.broadcast) ||
- nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
- vf_stats.multicast))
- return -EMSGSIZE;
- nla_nest_end(skb, vfstats);
- nla_nest_end(skb, vf);
- return 0;
- }
- static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
- {
- struct rtnl_link_ifmap map;
- memset(&map, 0, sizeof(map));
- map.mem_start = dev->mem_start;
- map.mem_end = dev->mem_end;
- map.base_addr = dev->base_addr;
- map.irq = dev->irq;
- map.dma = dev->dma;
- map.port = dev->if_port;
- if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
- return -EMSGSIZE;
- return 0;
- }
- static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
- int type, u32 pid, u32 seq, u32 change,
- unsigned int flags, u32 ext_filter_mask)
- {
- struct ifinfomsg *ifm;
- struct nlmsghdr *nlh;
- struct nlattr *af_spec;
- struct rtnl_af_ops *af_ops;
- struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
- ASSERT_RTNL();
- nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
- if (nlh == NULL)
- return -EMSGSIZE;
- ifm = nlmsg_data(nlh);
- ifm->ifi_family = AF_UNSPEC;
- ifm->__ifi_pad = 0;
- ifm->ifi_type = dev->type;
- ifm->ifi_index = dev->ifindex;
- ifm->ifi_flags = dev_get_flags(dev);
- ifm->ifi_change = change;
- if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
- nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
- nla_put_u8(skb, IFLA_OPERSTATE,
- netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
- nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
- nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
- nla_put_u32(skb, IFLA_GROUP, dev->group) ||
- nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
- nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
- #ifdef CONFIG_RPS
- nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
- #endif
- (dev->ifindex != dev_get_iflink(dev) &&
- nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
- (upper_dev &&
- nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
- nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
- (dev->qdisc &&
- nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
- (dev->ifalias &&
- nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
- nla_put_u32(skb, IFLA_CARRIER_CHANGES,
- atomic_read(&dev->carrier_changes)) ||
- nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
- goto nla_put_failure;
- if (rtnl_fill_link_ifmap(skb, dev))
- goto nla_put_failure;
- if (dev->addr_len) {
- if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
- nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
- goto nla_put_failure;
- }
- if (rtnl_phys_port_id_fill(skb, dev))
- goto nla_put_failure;
- if (rtnl_phys_port_name_fill(skb, dev))
- goto nla_put_failure;
- if (rtnl_phys_switch_id_fill(skb, dev))
- goto nla_put_failure;
- if (rtnl_fill_stats(skb, dev))
- goto nla_put_failure;
- if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
- nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
- goto nla_put_failure;
- if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
- ext_filter_mask & RTEXT_FILTER_VF) {
- int i;
- struct nlattr *vfinfo;
- int num_vfs = dev_num_vf(dev->dev.parent);
- vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
- if (!vfinfo)
- goto nla_put_failure;
- for (i = 0; i < num_vfs; i++) {
- if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
- goto nla_put_failure;
- }
- nla_nest_end(skb, vfinfo);
- }
- if (rtnl_port_fill(skb, dev, ext_filter_mask))
- goto nla_put_failure;
- if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
- if (rtnl_link_fill(skb, dev) < 0)
- goto nla_put_failure;
- }
- if (dev->rtnl_link_ops &&
- dev->rtnl_link_ops->get_link_net) {
- struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
- if (!net_eq(dev_net(dev), link_net)) {
- int id = peernet2id_alloc(dev_net(dev), link_net);
- if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
- goto nla_put_failure;
- }
- }
- if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
- goto nla_put_failure;
- list_for_each_entry(af_ops, &rtnl_af_ops, list) {
- if (af_ops->fill_link_af) {
- struct nlattr *af;
- int err;
- if (!(af = nla_nest_start(skb, af_ops->family)))
- goto nla_put_failure;
- err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
- /*
- * Caller may return ENODATA to indicate that there
- * was no data to be dumped. This is not an error, it
- * means we should trim the attribute header and
- * continue.
- */
- if (err == -ENODATA)
- nla_nest_cancel(skb, af);
- else if (err < 0)
- goto nla_put_failure;
- nla_nest_end(skb, af);
- }
- }
- nla_nest_end(skb, af_spec);
- nlmsg_end(skb, nlh);
- return 0;
- nla_put_failure:
- nlmsg_cancel(skb, nlh);
- return -EMSGSIZE;
- }
- static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
- [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
- [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
- [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
- [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
- [IFLA_MTU] = { .type = NLA_U32 },
- [IFLA_LINK] = { .type = NLA_U32 },
- [IFLA_MASTER] = { .type = NLA_U32 },
- [IFLA_CARRIER] = { .type = NLA_U8 },
- [IFLA_TXQLEN] = { .type = NLA_U32 },
- [IFLA_WEIGHT] = { .type = NLA_U32 },
- [IFLA_OPERSTATE] = { .type = NLA_U8 },
- [IFLA_LINKMODE] = { .type = NLA_U8 },
- [IFLA_LINKINFO] = { .type = NLA_NESTED },
- [IFLA_NET_NS_PID] = { .type = NLA_U32 },
- [IFLA_NET_NS_FD] = { .type = NLA_U32 },
- [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
- [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
- [IFLA_VF_PORTS] = { .type = NLA_NESTED },
- [IFLA_PORT_SELF] = { .type = NLA_NESTED },
- [IFLA_AF_SPEC] = { .type = NLA_NESTED },
- [IFLA_EXT_MASK] = { .type = NLA_U32 },
- [IFLA_PROMISCUITY] = { .type = NLA_U32 },
- [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
- [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
- [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
- [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
- [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
- [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
- [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
- [IFLA_GROUP] = { .type = NLA_U32 },
- };
- static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
- [IFLA_INFO_KIND] = { .type = NLA_STRING },
- [IFLA_INFO_DATA] = { .type = NLA_NESTED },
- [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
- [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
- };
- static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
- [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
- [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
- [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
- [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
- [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
- [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
- [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
- [IFLA_VF_STATS] = { .type = NLA_NESTED },
- [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
- };
- static const struct nla_policy ifla_vf_stats_policy[IFLA_VF_STATS_MAX + 1] = {
- [IFLA_VF_STATS_RX_PACKETS] = { .type = NLA_U64 },
- [IFLA_VF_STATS_TX_PACKETS] = { .type = NLA_U64 },
- [IFLA_VF_STATS_RX_BYTES] = { .type = NLA_U64 },
- [IFLA_VF_STATS_TX_BYTES] = { .type = NLA_U64 },
- [IFLA_VF_STATS_BROADCAST] = { .type = NLA_U64 },
- [IFLA_VF_STATS_MULTICAST] = { .type = NLA_U64 },
- };
- static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
- [IFLA_PORT_VF] = { .type = NLA_U32 },
- [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
- .len = PORT_PROFILE_MAX },
- [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
- .len = sizeof(struct ifla_port_vsi)},
- [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
- .len = PORT_UUID_MAX },
- [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
- .len = PORT_UUID_MAX },
- [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
- [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
- };
- static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
- {
- struct net *net = sock_net(skb->sk);
- int h, s_h;
- int idx = 0, s_idx;
- struct net_device *dev;
- struct hlist_head *head;
- struct nlattr *tb[IFLA_MAX+1];
- u32 ext_filter_mask = 0;
- int err;
- int hdrlen;
- s_h = cb->args[0];
- s_idx = cb->args[1];
- cb->seq = net->dev_base_seq;
- /* A hack to preserve kernel<->userspace interface.
- * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
- * However, before Linux v3.9 the code here assumed rtgenmsg and that's
- * what iproute2 < v3.9.0 used.
- * We can detect the old iproute2. Even including the IFLA_EXT_MASK
- * attribute, its netlink message is shorter than struct ifinfomsg.
- */
- hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
- sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
- if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
- if (tb[IFLA_EXT_MASK])
- ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
- }
- for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
- idx = 0;
- head = &net->dev_index_head[h];
- hlist_for_each_entry(dev, head, index_hlist) {
- if (idx < s_idx)
- goto cont;
- err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
- NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq, 0,
- NLM_F_MULTI,
- ext_filter_mask);
- if (err < 0) {
- if (likely(skb->len))
- goto out;
- goto out_err;
- }
- nl_dump_check_consistent(cb, nlmsg_hdr(skb));
- cont:
- idx++;
- }
- }
- out:
- err = skb->len;
- out_err:
- cb->args[1] = idx;
- cb->args[0] = h;
- return err;
- }
- int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
- {
- return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
- }
- EXPORT_SYMBOL(rtnl_nla_parse_ifla);
- struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
- {
- struct net *net;
- /* Examine the link attributes and figure out which
- * network namespace we are talking about.
- */
- if (tb[IFLA_NET_NS_PID])
- net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
- else if (tb[IFLA_NET_NS_FD])
- net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
- else
- net = get_net(src_net);
- return net;
- }
- EXPORT_SYMBOL(rtnl_link_get_net);
- static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
- {
- if (dev) {
- if (tb[IFLA_ADDRESS] &&
- nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
- return -EINVAL;
- if (tb[IFLA_BROADCAST] &&
- nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
- return -EINVAL;
- }
- if (tb[IFLA_AF_SPEC]) {
- struct nlattr *af;
- int rem, err;
- nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
- const struct rtnl_af_ops *af_ops;
- if (!(af_ops = rtnl_af_lookup(nla_type(af))))
- return -EAFNOSUPPORT;
- if (!af_ops->set_link_af)
- return -EOPNOTSUPP;
- if (af_ops->validate_link_af) {
- err = af_ops->validate_link_af(dev, af);
- if (err < 0)
- return err;
- }
- }
- }
- return 0;
- }
- static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
- {
- const struct net_device_ops *ops = dev->netdev_ops;
- int err = -EINVAL;
- if (tb[IFLA_VF_MAC]) {
- struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
- err = -EOPNOTSUPP;
- if (ops->ndo_set_vf_mac)
- err = ops->ndo_set_vf_mac(dev, ivm->vf,
- ivm->mac);
- if (err < 0)
- return err;
- }
- if (tb[IFLA_VF_VLAN]) {
- struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
- err = -EOPNOTSUPP;
- if (ops->ndo_set_vf_vlan)
- err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
- ivv->qos);
- if (err < 0)
- return err;
- }
- if (tb[IFLA_VF_TX_RATE]) {
- struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
- struct ifla_vf_info ivf;
- err = -EOPNOTSUPP;
- if (ops->ndo_get_vf_config)
- err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
- if (err < 0)
- return err;
- err = -EOPNOTSUPP;
- if (ops->ndo_set_vf_rate)
- err = ops->ndo_set_vf_rate(dev, ivt->vf,
- ivf.min_tx_rate,
- ivt->rate);
- if (err < 0)
- return err;
- }
- if (tb[IFLA_VF_RATE]) {
- struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
- err = -EOPNOTSUPP;
- if (ops->ndo_set_vf_rate)
- err = ops->ndo_set_vf_rate(dev, ivt->vf,
- ivt->min_tx_rate,
- ivt->max_tx_rate);
- if (err < 0)
- return err;
- }
- if (tb[IFLA_VF_SPOOFCHK]) {
- struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
- err = -EOPNOTSUPP;
- if (ops->ndo_set_vf_spoofchk)
- err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
- ivs->setting);
- if (err < 0)
- return err;
- }
- if (tb[IFLA_VF_LINK_STATE]) {
- struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
- err = -EOPNOTSUPP;
- if (ops->ndo_set_vf_link_state)
- err = ops->ndo_set_vf_link_state(dev, ivl->vf,
- ivl->link_state);
- if (err < 0)
- return err;
- }
- if (tb[IFLA_VF_RSS_QUERY_EN]) {
- struct ifla_vf_rss_query_en *ivrssq_en;
- err = -EOPNOTSUPP;
- ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
- if (ops->ndo_set_vf_rss_query_en)
- err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
- ivrssq_en->setting);
- if (err < 0)
- return err;
- }
- if (tb[IFLA_VF_TRUST]) {
- struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
- err = -EOPNOTSUPP;
- if (ops->ndo_set_vf_trust)
- err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
- if (err < 0)
- return err;
- }
- return err;
- }
- static int do_set_master(struct net_device *dev, int ifindex)
- {
- struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
- const struct net_device_ops *ops;
- int err;
- if (upper_dev) {
- if (upper_dev->ifindex == ifindex)
- return 0;
- ops = upper_dev->netdev_ops;
- if (ops->ndo_del_slave) {
- err = ops->ndo_del_slave(upper_dev, dev);
- if (err)
- return err;
- } else {
- return -EOPNOTSUPP;
- }
- }
- if (ifindex) {
- upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
- if (!upper_dev)
- return -EINVAL;
- ops = upper_dev->netdev_ops;
- if (ops->ndo_add_slave) {
- err = ops->ndo_add_slave(upper_dev, dev);
- if (err)
- return err;
- } else {
- return -EOPNOTSUPP;
- }
- }
- return 0;
- }
- #define DO_SETLINK_MODIFIED 0x01
- /* notify flag means notify + modified. */
- #define DO_SETLINK_NOTIFY 0x03
- static int do_setlink(const struct sk_buff *skb,
- struct net_device *dev, struct ifinfomsg *ifm,
- struct nlattr **tb, char *ifname, int status)
- {
- const struct net_device_ops *ops = dev->netdev_ops;
- int err;
- err = validate_linkmsg(dev, tb);
- if (err < 0)
- return err;
- if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
- struct net *net = rtnl_link_get_net(dev_net(dev), tb);
- if (IS_ERR(net)) {
- err = PTR_ERR(net);
- goto errout;
- }
- if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
- put_net(net);
- err = -EPERM;
- goto errout;
- }
- err = dev_change_net_namespace(dev, net, ifname);
- put_net(net);
- if (err)
- goto errout;
- status |= DO_SETLINK_MODIFIED;
- }
- if (tb[IFLA_MAP]) {
- struct rtnl_link_ifmap *u_map;
- struct ifmap k_map;
- if (!ops->ndo_set_config) {
- err = -EOPNOTSUPP;
- goto errout;
- }
- if (!netif_device_present(dev)) {
- err = -ENODEV;
- goto errout;
- }
- u_map = nla_data(tb[IFLA_MAP]);
- k_map.mem_start = (unsigned long) u_map->mem_start;
- k_map.mem_end = (unsigned long) u_map->mem_end;
- k_map.base_addr = (unsigned short) u_map->base_addr;
- k_map.irq = (unsigned char) u_map->irq;
- k_map.dma = (unsigned char) u_map->dma;
- k_map.port = (unsigned char) u_map->port;
- err = ops->ndo_set_config(dev, &k_map);
- if (err < 0)
- goto errout;
- status |= DO_SETLINK_NOTIFY;
- }
- if (tb[IFLA_ADDRESS]) {
- struct sockaddr *sa;
- int len;
- len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
- sizeof(*sa));
- sa = kmalloc(len, GFP_KERNEL);
- if (!sa) {
- err = -ENOMEM;
- goto errout;
- }
- sa->sa_family = dev->type;
- memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
- dev->addr_len);
- err = dev_set_mac_address(dev, sa);
- kfree(sa);
- if (err)
- goto errout;
- status |= DO_SETLINK_MODIFIED;
- }
- if (tb[IFLA_MTU]) {
- err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
- if (err < 0)
- goto errout;
- status |= DO_SETLINK_MODIFIED;
- }
- if (tb[IFLA_GROUP]) {
- dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
- status |= DO_SETLINK_NOTIFY;
- }
- /*
- * Interface selected by interface index but interface
- * name provided implies that a name change has been
- * requested.
- */
- if (ifm->ifi_index > 0 && ifname[0]) {
- err = dev_change_name(dev, ifname);
- if (err < 0)
- goto errout;
- status |= DO_SETLINK_MODIFIED;
- }
- if (tb[IFLA_IFALIAS]) {
- err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
- nla_len(tb[IFLA_IFALIAS]));
- if (err < 0)
- goto errout;
- status |= DO_SETLINK_NOTIFY;
- }
- if (tb[IFLA_BROADCAST]) {
- nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
- call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
- }
- if (ifm->ifi_flags || ifm->ifi_change) {
- err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
- if (err < 0)
- goto errout;
- }
- if (tb[IFLA_MASTER]) {
- err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
- if (err)
- goto errout;
- status |= DO_SETLINK_MODIFIED;
- }
- if (tb[IFLA_CARRIER]) {
- err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
- if (err)
- goto errout;
- status |= DO_SETLINK_MODIFIED;
- }
- if (tb[IFLA_TXQLEN]) {
- unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
- if (dev->tx_queue_len ^ value)
- status |= DO_SETLINK_NOTIFY;
- dev->tx_queue_len = value;
- }
- if (tb[IFLA_OPERSTATE])
- set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
- if (tb[IFLA_LINKMODE]) {
- unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
- write_lock_bh(&dev_base_lock);
- if (dev->link_mode ^ value)
- status |= DO_SETLINK_NOTIFY;
- dev->link_mode = value;
- write_unlock_bh(&dev_base_lock);
- }
- if (tb[IFLA_VFINFO_LIST]) {
- struct nlattr *vfinfo[IFLA_VF_MAX + 1];
- struct nlattr *attr;
- int rem;
- nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
- if (nla_type(attr) != IFLA_VF_INFO ||
- nla_len(attr) < NLA_HDRLEN) {
- err = -EINVAL;
- goto errout;
- }
- err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
- ifla_vf_policy);
- if (err < 0)
- goto errout;
- err = do_setvfinfo(dev, vfinfo);
- if (err < 0)
- goto errout;
- status |= DO_SETLINK_NOTIFY;
- }
- }
- err = 0;
- if (tb[IFLA_VF_PORTS]) {
- struct nlattr *port[IFLA_PORT_MAX+1];
- struct nlattr *attr;
- int vf;
- int rem;
- err = -EOPNOTSUPP;
- if (!ops->ndo_set_vf_port)
- goto errout;
- nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
- if (nla_type(attr) != IFLA_VF_PORT ||
- nla_len(attr) < NLA_HDRLEN) {
- err = -EINVAL;
- goto errout;
- }
- err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
- ifla_port_policy);
- if (err < 0)
- goto errout;
- if (!port[IFLA_PORT_VF]) {
- err = -EOPNOTSUPP;
- goto errout;
- }
- vf = nla_get_u32(port[IFLA_PORT_VF]);
- err = ops->ndo_set_vf_port(dev, vf, port);
- if (err < 0)
- goto errout;
- status |= DO_SETLINK_NOTIFY;
- }
- }
- err = 0;
- if (tb[IFLA_PORT_SELF]) {
- struct nlattr *port[IFLA_PORT_MAX+1];
- err = nla_parse_nested(port, IFLA_PORT_MAX,
- tb[IFLA_PORT_SELF], ifla_port_policy);
- if (err < 0)
- goto errout;
- err = -EOPNOTSUPP;
- if (ops->ndo_set_vf_port)
- err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
- if (err < 0)
- goto errout;
- status |= DO_SETLINK_NOTIFY;
- }
- if (tb[IFLA_AF_SPEC]) {
- struct nlattr *af;
- int rem;
- nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
- const struct rtnl_af_ops *af_ops;
- if (!(af_ops = rtnl_af_lookup(nla_type(af))))
- BUG();
- err = af_ops->set_link_af(dev, af);
- if (err < 0)
- goto errout;
- status |= DO_SETLINK_NOTIFY;
- }
- }
- err = 0;
- if (tb[IFLA_PROTO_DOWN]) {
- err = dev_change_proto_down(dev,
- nla_get_u8(tb[IFLA_PROTO_DOWN]));
- if (err)
- goto errout;
- status |= DO_SETLINK_NOTIFY;
- }
- errout:
- if (status & DO_SETLINK_MODIFIED) {
- if (status & DO_SETLINK_NOTIFY)
- netdev_state_change(dev);
- if (err < 0)
- net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n",
- dev->name);
- }
- return err;
- }
- static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
- {
- struct net *net = sock_net(skb->sk);
- struct ifinfomsg *ifm;
- struct net_device *dev;
- int err;
- struct nlattr *tb[IFLA_MAX+1];
- char ifname[IFNAMSIZ];
- err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
- if (err < 0)
- goto errout;
- if (tb[IFLA_IFNAME])
- nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
- else
- ifname[0] = '\0';
- err = -EINVAL;
- ifm = nlmsg_data(nlh);
- if (ifm->ifi_index > 0)
- dev = __dev_get_by_index(net, ifm->ifi_index);
- else if (tb[IFLA_IFNAME])
- dev = __dev_get_by_name(net, ifname);
- else
- goto errout;
- if (dev == NULL) {
- err = -ENODEV;
- goto errout;
- }
- err = do_setlink(skb, dev, ifm, tb, ifname, 0);
- errout:
- return err;
- }
- static int rtnl_group_dellink(const struct net *net, int group)
- {
- struct net_device *dev, *aux;
- LIST_HEAD(list_kill);
- bool found = false;
- if (!group)
- return -EPERM;
- for_each_netdev(net, dev) {
- if (dev->group == group) {
- const struct rtnl_link_ops *ops;
- found = true;
- ops = dev->rtnl_link_ops;
- if (!ops || !ops->dellink)
- return -EOPNOTSUPP;
- }
- }
- if (!found)
- return -ENODEV;
- for_each_netdev_safe(net, dev, aux) {
- if (dev->group == group) {
- const struct rtnl_link_ops *ops;
- ops = dev->rtnl_link_ops;
- ops->dellink(dev, &list_kill);
- }
- }
- unregister_netdevice_many(&list_kill);
- return 0;
- }
- int rtnl_delete_link(struct net_device *dev)
- {
- const struct rtnl_link_ops *ops;
- LIST_HEAD(list_kill);
- ops = dev->rtnl_link_ops;
- if (!ops || !ops->dellink)
- return -EOPNOTSUPP;
- ops->dellink(dev, &list_kill);
- unregister_netdevice_many(&list_kill);
- return 0;
- }
- EXPORT_SYMBOL_GPL(rtnl_delete_link);
- static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
- {
- struct net *net = sock_net(skb->sk);
- struct net_device *dev;
- struct ifinfomsg *ifm;
- char ifname[IFNAMSIZ];
- struct nlattr *tb[IFLA_MAX+1];
- int err;
- err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
- if (err < 0)
- return err;
- if (tb[IFLA_IFNAME])
- nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
- ifm = nlmsg_data(nlh);
- if (ifm->ifi_index > 0)
- dev = __dev_get_by_index(net, ifm->ifi_index);
- else if (tb[IFLA_IFNAME])
- dev = __dev_get_by_name(net, ifname);
- else if (tb[IFLA_GROUP])
- return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
- else
- return -EINVAL;
- if (!dev)
- return -ENODEV;
- return rtnl_delete_link(dev);
- }
- int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
- {
- unsigned int old_flags;
- int err;
- old_flags = dev->flags;
- if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
- err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
- if (err < 0)
- return err;
- }
- if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
- __dev_notify_flags(dev, old_flags, 0U);
- } else {
- dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
- __dev_notify_flags(dev, old_flags, ~0U);
- }
- return 0;
- }
- EXPORT_SYMBOL(rtnl_configure_link);
- struct net_device *rtnl_create_link(struct net *net,
- const char *ifname, unsigned char name_assign_type,
- const struct rtnl_link_ops *ops, struct nlattr *tb[])
- {
- int err;
- struct net_device *dev;
- unsigned int num_tx_queues = 1;
- unsigned int num_rx_queues = 1;
- if (tb[IFLA_NUM_TX_QUEUES])
- num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
- else if (ops->get_num_tx_queues)
- num_tx_queues = ops->get_num_tx_queues();
- if (tb[IFLA_NUM_RX_QUEUES])
- num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
- else if (ops->get_num_rx_queues)
- num_rx_queues = ops->get_num_rx_queues();
- if (num_tx_queues < 1 || num_tx_queues > 4096)
- return ERR_PTR(-EINVAL);
- if (num_rx_queues < 1 || num_rx_queues > 4096)
- return ERR_PTR(-EINVAL);
- err = -ENOMEM;
- dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
- ops->setup, num_tx_queues, num_rx_queues);
- if (!dev)
- goto err;
- dev_net_set(dev, net);
- dev->rtnl_link_ops = ops;
- dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
- if (tb[IFLA_MTU])
- dev->mtu = nla_get_u32(tb[IFLA_MTU]);
- if (tb[IFLA_ADDRESS]) {
- memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
- nla_len(tb[IFLA_ADDRESS]));
- dev->addr_assign_type = NET_ADDR_SET;
- }
- if (tb[IFLA_BROADCAST])
- memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
- nla_len(tb[IFLA_BROADCAST]));
- if (tb[IFLA_TXQLEN])
- dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
- if (tb[IFLA_OPERSTATE])
- set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
- if (tb[IFLA_LINKMODE])
- dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
- if (tb[IFLA_GROUP])
- dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
- return dev;
- err:
- return ERR_PTR(err);
- }
- EXPORT_SYMBOL(rtnl_create_link);
- static int rtnl_group_changelink(const struct sk_buff *skb,
- struct net *net, int group,
- struct ifinfomsg *ifm,
- struct nlattr **tb)
- {
- struct net_device *dev, *aux;
- int err;
- for_each_netdev_safe(net, dev, aux) {
- if (dev->group == group) {
- err = do_setlink(skb, dev, ifm, tb, NULL, 0);
- if (err < 0)
- return err;
- }
- }
- return 0;
- }
- static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
- {
- struct net *net = sock_net(skb->sk);
- const struct rtnl_link_ops *ops;
- const struct rtnl_link_ops *m_ops = NULL;
- struct net_device *dev;
- struct net_device *master_dev = NULL;
- struct ifinfomsg *ifm;
- char kind[MODULE_NAME_LEN];
- char ifname[IFNAMSIZ];
- struct nlattr *tb[IFLA_MAX+1];
- struct nlattr *linkinfo[IFLA_INFO_MAX+1];
- unsigned char name_assign_type = NET_NAME_USER;
- int err;
- #ifdef CONFIG_MODULES
- replay:
- #endif
- err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
- if (err < 0)
- return err;
- if (tb[IFLA_IFNAME])
- nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
- else
- ifname[0] = '\0';
- ifm = nlmsg_data(nlh);
- if (ifm->ifi_index > 0)
- dev = __dev_get_by_index(net, ifm->ifi_index);
- else {
- if (ifname[0])
- dev = __dev_get_by_name(net, ifname);
- else
- dev = NULL;
- }
- if (dev) {
- master_dev = netdev_master_upper_dev_get(dev);
- if (master_dev)
- m_ops = master_dev->rtnl_link_ops;
- }
- err = validate_linkmsg(dev, tb);
- if (err < 0)
- return err;
- if (tb[IFLA_LINKINFO]) {
- err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
- tb[IFLA_LINKINFO], ifla_info_policy);
- if (err < 0)
- return err;
- } else
- memset(linkinfo, 0, sizeof(linkinfo));
- if (linkinfo[IFLA_INFO_KIND]) {
- nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
- ops = rtnl_link_ops_get(kind);
- } else {
- kind[0] = '\0';
- ops = NULL;
- }
- if (1) {
- struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
- struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
- struct nlattr **data = NULL;
- struct nlattr **slave_data = NULL;
- struct net *dest_net, *link_net = NULL;
- if (ops) {
- if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
- err = nla_parse_nested(attr, ops->maxtype,
- linkinfo[IFLA_INFO_DATA],
- ops->policy);
- if (err < 0)
- return err;
- data = attr;
- }
- if (ops->validate) {
- err = ops->validate(tb, data);
- if (err < 0)
- return err;
- }
- }
- if (m_ops) {
- if (m_ops->slave_maxtype &&
- linkinfo[IFLA_INFO_SLAVE_DATA]) {
- err = nla_parse_nested(slave_attr,
- m_ops->slave_maxtype,
- linkinfo[IFLA_INFO_SLAVE_DATA],
- m_ops->slave_policy);
- if (err < 0)
- return err;
- slave_data = slave_attr;
- }
- if (m_ops->slave_validate) {
- err = m_ops->slave_validate(tb, slave_data);
- if (err < 0)
- return err;
- }
- }
- if (dev) {
- int status = 0;
- if (nlh->nlmsg_flags & NLM_F_EXCL)
- return -EEXIST;
- if (nlh->nlmsg_flags & NLM_F_REPLACE)
- return -EOPNOTSUPP;
- if (linkinfo[IFLA_INFO_DATA]) {
- if (!ops || ops != dev->rtnl_link_ops ||
- !ops->changelink)
- return -EOPNOTSUPP;
- err = ops->changelink(dev, tb, data);
- if (err < 0)
- return err;
- status |= DO_SETLINK_NOTIFY;
- }
- if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
- if (!m_ops || !m_ops->slave_changelink)
- return -EOPNOTSUPP;
- err = m_ops->slave_changelink(master_dev, dev,
- tb, slave_data);
- if (err < 0)
- return err;
- status |= DO_SETLINK_NOTIFY;
- }
- return do_setlink(skb, dev, ifm, tb, ifname, status);
- }
- if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
- if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
- return rtnl_group_changelink(skb, net,
- nla_get_u32(tb[IFLA_GROUP]),
- ifm, tb);
- return -ENODEV;
- }
- if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
- return -EOPNOTSUPP;
- if (!ops) {
- #ifdef CONFIG_MODULES
- if (kind[0]) {
- __rtnl_unlock();
- request_module("rtnl-link-%s", kind);
- rtnl_lock();
- ops = rtnl_link_ops_get(kind);
- if (ops)
- goto replay;
- }
- #endif
- return -EOPNOTSUPP;
- }
- if (!ops->setup)
- return -EOPNOTSUPP;
- if (!ifname[0]) {
- snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
- name_assign_type = NET_NAME_ENUM;
- }
- dest_net = rtnl_link_get_net(net, tb);
- if (IS_ERR(dest_net))
- return PTR_ERR(dest_net);
- err = -EPERM;
- if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
- goto out;
- if (tb[IFLA_LINK_NETNSID]) {
- int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
- link_net = get_net_ns_by_id(dest_net, id);
- if (!link_net) {
- err = -EINVAL;
- goto out;
- }
- err = -EPERM;
- if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
- goto out;
- }
- dev = rtnl_create_link(link_net ? : dest_net, ifname,
- name_assign_type, ops, tb);
- if (IS_ERR(dev)) {
- err = PTR_ERR(dev);
- goto out;
- }
- dev->ifindex = ifm->ifi_index;
- if (ops->newlink) {
- err = ops->newlink(link_net ? : net, dev, tb, data);
- /* Drivers should call free_netdev() in ->destructor
- * and unregister it on failure after registration
- * so that device could be finally freed in rtnl_unlock.
- */
- if (err < 0) {
- /* If device is not registered at all, free it now */
- if (dev->reg_state == NETREG_UNINITIALIZED)
- free_netdev(dev);
- goto out;
- }
- } else {
- err = register_netdevice(dev);
- if (err < 0) {
- free_netdev(dev);
- goto out;
- }
- }
- err = rtnl_configure_link(dev, ifm);
- if (err < 0)
- goto out_unregister;
- if (link_net) {
- err = dev_change_net_namespace(dev, dest_net, ifname);
- if (err < 0)
- goto out_unregister;
- }
- out:
- if (link_net)
- put_net(link_net);
- put_net(dest_net);
- return err;
- out_unregister:
- if (ops->newlink) {
- LIST_HEAD(list_kill);
- ops->dellink(dev, &list_kill);
- unregister_netdevice_many(&list_kill);
- } else {
- unregister_netdevice(dev);
- }
- goto out;
- }
- }
- static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
- {
- struct net *net = sock_net(skb->sk);
- struct ifinfomsg *ifm;
- char ifname[IFNAMSIZ];
- struct nlattr *tb[IFLA_MAX+1];
- struct net_device *dev = NULL;
- struct sk_buff *nskb;
- int err;
- u32 ext_filter_mask = 0;
- err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
- if (err < 0)
- return err;
- if (tb[IFLA_IFNAME])
- nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
- if (tb[IFLA_EXT_MASK])
- ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
- ifm = nlmsg_data(nlh);
- if (ifm->ifi_index > 0)
- dev = __dev_get_by_index(net, ifm->ifi_index);
- else if (tb[IFLA_IFNAME])
- dev = __dev_get_by_name(net, ifname);
- else
- return -EINVAL;
- if (dev == NULL)
- return -ENODEV;
- nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
- if (nskb == NULL)
- return -ENOBUFS;
- err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
- nlh->nlmsg_seq, 0, 0, ext_filter_mask);
- if (err < 0) {
- /* -EMSGSIZE implies BUG in if_nlmsg_size */
- WARN_ON(err == -EMSGSIZE);
- kfree_skb(nskb);
- } else
- err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
- return err;
- }
- static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
- {
- struct net *net = sock_net(skb->sk);
- struct net_device *dev;
- struct nlattr *tb[IFLA_MAX+1];
- u32 ext_filter_mask = 0;
- u16 min_ifinfo_dump_size = 0;
- int hdrlen;
- /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
- hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
- sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
- if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
- if (tb[IFLA_EXT_MASK])
- ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
- }
- if (!ext_filter_mask)
- return NLMSG_GOODSIZE;
- /*
- * traverse the list of net devices and compute the minimum
- * buffer size based upon the filter mask.
- */
- list_for_each_entry(dev, &net->dev_base_head, dev_list) {
- min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
- if_nlmsg_size(dev,
- ext_filter_mask));
- }
- return min_ifinfo_dump_size;
- }
- static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
- {
- int idx;
- int s_idx = cb->family;
- if (s_idx == 0)
- s_idx = 1;
- for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
- int type = cb->nlh->nlmsg_type-RTM_BASE;
- if (idx < s_idx || idx == PF_PACKET)
- continue;
- if (rtnl_msg_handlers[idx] == NULL ||
- rtnl_msg_handlers[idx][type].dumpit == NULL)
- continue;
- if (idx > s_idx) {
- memset(&cb->args[0], 0, sizeof(cb->args));
- cb->prev_seq = 0;
- cb->seq = 0;
- }
- if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
- break;
- }
- cb->family = idx;
- return skb->len;
- }
- struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
- unsigned int change, gfp_t flags)
- {
- struct net *net = dev_net(dev);
- struct sk_buff *skb;
- int err = -ENOBUFS;
- size_t if_info_size;
- skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
- if (skb == NULL)
- goto errout;
- err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
- if (err < 0) {
- /* -EMSGSIZE implies BUG in if_nlmsg_size() */
- WARN_ON(err == -EMSGSIZE);
- kfree_skb(skb);
- goto errout;
- }
- return skb;
- errout:
- if (err < 0)
- rtnl_set_sk_err(net, RTNLGRP_LINK, err);
- return NULL;
- }
- void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
- {
- struct net *net = dev_net(dev);
- rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
- }
- void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
- gfp_t flags)
- {
- struct sk_buff *skb;
- if (dev->reg_state != NETREG_REGISTERED)
- return;
- skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
- if (skb)
- rtmsg_ifinfo_send(skb, dev, flags);
- }
- EXPORT_SYMBOL(rtmsg_ifinfo);
- static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
- struct net_device *dev,
- u8 *addr, u16 vid, u32 pid, u32 seq,
- int type, unsigned int flags,
- int nlflags)
- {
- struct nlmsghdr *nlh;
- struct ndmsg *ndm;
- nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
- if (!nlh)
- return -EMSGSIZE;
- ndm = nlmsg_data(nlh);
- ndm->ndm_family = AF_BRIDGE;
- ndm->ndm_pad1 = 0;
- ndm->ndm_pad2 = 0;
- ndm->ndm_flags = flags;
- ndm->ndm_type = 0;
- ndm->ndm_ifindex = dev->ifindex;
- ndm->ndm_state = NUD_PERMANENT;
- if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
- goto nla_put_failure;
- if (vid)
- if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
- goto nla_put_failure;
- nlmsg_end(skb, nlh);
- return 0;
- nla_put_failure:
- nlmsg_cancel(skb, nlh);
- return -EMSGSIZE;
- }
- static inline size_t rtnl_fdb_nlmsg_size(void)
- {
- return NLMSG_ALIGN(sizeof(struct ndmsg)) +
- nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
- nla_total_size(sizeof(u16)) + /* NDA_VLAN */
- 0;
- }
- static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type)
- {
- struct net *net = dev_net(dev);
- struct sk_buff *skb;
- int err = -ENOBUFS;
- skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
- if (!skb)
- goto errout;
- err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
- 0, 0, type, NTF_SELF, 0);
- if (err < 0) {
- kfree_skb(skb);
- goto errout;
- }
- rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
- return;
- errout:
- rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
- }
- /**
- * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
- */
- int ndo_dflt_fdb_add(struct ndmsg *ndm,
- struct nlattr *tb[],
- struct net_device *dev,
- const unsigned char *addr, u16 vid,
- u16 flags)
- {
- int err = -EINVAL;
- /* If aging addresses are supported device will need to
- * implement its own handler for this.
- */
- if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
- pr_info("%s: FDB only supports static addresses\n", dev->name);
- return err;
- }
- if (vid) {
- pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
- return err;
- }
- if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
- err = dev_uc_add_excl(dev, addr);
- else if (is_multicast_ether_addr(addr))
- err = dev_mc_add_excl(dev, addr);
- /* Only return duplicate errors if NLM_F_EXCL is set */
- if (err == -EEXIST && !(flags & NLM_F_EXCL))
- err = 0;
- return err;
- }
- EXPORT_SYMBOL(ndo_dflt_fdb_add);
- static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
- {
- u16 vid = 0;
- if (vlan_attr) {
- if (nla_len(vlan_attr) != sizeof(u16)) {
- pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
- return -EINVAL;
- }
- vid = nla_get_u16(vlan_attr);
- if (!vid || vid >= VLAN_VID_MASK) {
- pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
- vid);
- return -EINVAL;
- }
- }
- *p_vid = vid;
- return 0;
- }
- static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
- {
- struct net *net = sock_net(skb->sk);
- struct ndmsg *ndm;
- struct nlattr *tb[NDA_MAX+1];
- struct net_device *dev;
- u8 *addr;
- u16 vid;
- int err;
- err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
- if (err < 0)
- return err;
- ndm = nlmsg_data(nlh);
- if (ndm->ndm_ifindex == 0) {
- pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
- return -EINVAL;
- }
- dev = __dev_get_by_index(net, ndm->ndm_ifindex);
- if (dev == NULL) {
- pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
- return -ENODEV;
- }
- if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
- pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
- return -EINVAL;
- }
- if (dev->type != ARPHRD_ETHER) {
- pr_info("PF_BRIDGE: FDB add only supported for Ethernet devices");
- return -EINVAL;
- }
- addr = nla_data(tb[NDA_LLADDR]);
- err = fdb_vid_parse(tb[NDA_VLAN], &vid);
- if (err)
- return err;
- err = -EOPNOTSUPP;
- /* Support fdb on master device the net/bridge default case */
- if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
- (dev->priv_flags & IFF_BRIDGE_PORT)) {
- struct net_device *br_dev = netdev_master_upper_dev_get(dev);
- const struct net_device_ops *ops = br_dev->netdev_ops;
- err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
- nlh->nlmsg_flags);
- if (err)
- goto out;
- else
- ndm->ndm_flags &= ~NTF_MASTER;
- }
- /* Embedded bridge, macvlan, and any other device support */
- if ((ndm->ndm_flags & NTF_SELF)) {
- if (dev->netdev_ops->ndo_fdb_add)
- err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
- vid,
- nlh->nlmsg_flags);
- else
- err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
- nlh->nlmsg_flags);
- if (!err) {
- rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH);
- ndm->ndm_flags &= ~NTF_SELF;
- }
- }
- out:
- return err;
- }
- /**
- * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
- */
- int ndo_dflt_fdb_del(struct ndmsg *ndm,
- struct nlattr *tb[],
- struct net_device *dev,
- const unsigned char *addr, u16 vid)
- {
- int err = -EINVAL;
- /* If aging addresses are supported device will need to
- * implement its own handler for this.
- */
- if (!(ndm->ndm_state & NUD_PERMANENT)) {
- pr_info("%s: FDB only supports static addresses\n", dev->name);
- return err;
- }
- if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
- err = dev_uc_del(dev, addr);
- else if (is_multicast_ether_addr(addr))
- err = dev_mc_del(dev, addr);
- return err;
- }
- EXPORT_SYMBOL(ndo_dflt_fdb_del);
- static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
- {
- struct net *net = sock_net(skb->sk);
- struct ndmsg *ndm;
- struct nlattr *tb[NDA_MAX+1];
- struct net_device *dev;
- int err = -EINVAL;
- __u8 *addr;
- u16 vid;
- if (!netlink_capable(skb, CAP_NET_ADMIN))
- return -EPERM;
- err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
- if (err < 0)
- return err;
- ndm = nlmsg_data(nlh);
- if (ndm->ndm_ifindex == 0) {
- pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
- return -EINVAL;
- }
- dev = __dev_get_by_index(net, ndm->ndm_ifindex);
- if (dev == NULL) {
- pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
- return -ENODEV;
- }
- if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
- pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
- return -EINVAL;
- }
- if (dev->type != ARPHRD_ETHER) {
- pr_info("PF_BRIDGE: FDB delete only supported for Ethernet devices");
- return -EINVAL;
- }
- addr = nla_data(tb[NDA_LLADDR]);
- err = fdb_vid_parse(tb[NDA_VLAN], &vid);
- if (err)
- return err;
- err = -EOPNOTSUPP;
- /* Support fdb on master device the net/bridge default case */
- if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
- (dev->priv_flags & IFF_BRIDGE_PORT)) {
- struct net_device *br_dev = netdev_master_upper_dev_get(dev);
- const struct net_device_ops *ops = br_dev->netdev_ops;
- if (ops->ndo_fdb_del)
- err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
- if (err)
- goto out;
- else
- ndm->ndm_flags &= ~NTF_MASTER;
- }
- /* Embedded bridge, macvlan, and any other device support */
- if (ndm->ndm_flags & NTF_SELF) {
- if (dev->netdev_ops->ndo_fdb_del)
- err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
- vid);
- else
- err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
- if (!err) {
- rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH);
- ndm->ndm_flags &= ~NTF_SELF;
- }
- }
- out:
- return err;
- }
- static int nlmsg_populate_fdb(struct sk_buff *skb,
- struct netlink_callback *cb,
- struct net_device *dev,
- int *idx,
- struct netdev_hw_addr_list *list)
- {
- struct netdev_hw_addr *ha;
- int err;
- u32 portid, seq;
- portid = NETLINK_CB(cb->skb).portid;
- seq = cb->nlh->nlmsg_seq;
- list_for_each_entry(ha, &list->list, list) {
- if (*idx < cb->args[0])
- goto skip;
- err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
- portid, seq,
- RTM_NEWNEIGH, NTF_SELF,
- NLM_F_MULTI);
- if (err < 0)
- return err;
- skip:
- *idx += 1;
- }
- return 0;
- }
- /**
- * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
- * @nlh: netlink message header
- * @dev: netdevice
- *
- * Default netdevice operation to dump the existing unicast address list.
- * Returns number of addresses from list put in skb.
- */
- int ndo_dflt_fdb_dump(struct sk_buff *skb,
- struct netlink_callback *cb,
- struct net_device *dev,
- struct net_device *filter_dev,
- int idx)
- {
- int err;
- if (dev->type != ARPHRD_ETHER)
- return -EINVAL;
- netif_addr_lock_bh(dev);
- err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
- if (err)
- goto out;
- nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
- out:
- netif_addr_unlock_bh(dev);
- return idx;
- }
- EXPORT_SYMBOL(ndo_dflt_fdb_dump);
- static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
- {
- struct net_device *dev;
- struct nlattr *tb[IFLA_MAX+1];
- struct net_device *br_dev = NULL;
- const struct net_device_ops *ops = NULL;
- const struct net_device_ops *cops = NULL;
- struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
- struct net *net = sock_net(skb->sk);
- int brport_idx = 0;
- int br_idx = 0;
- int idx = 0;
- if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
- ifla_policy) == 0) {
- if (tb[IFLA_MASTER])
- br_idx = nla_get_u32(tb[IFLA_MASTER]);
- }
- brport_idx = ifm->ifi_index;
- if (br_idx) {
- br_dev = __dev_get_by_index(net, br_idx);
- if (!br_dev)
- return -ENODEV;
- ops = br_dev->netdev_ops;
- }
- for_each_netdev(net, dev) {
- if (brport_idx && (dev->ifindex != brport_idx))
- continue;
- if (!br_idx) { /* user did not specify a specific bridge */
- if (dev->priv_flags & IFF_BRIDGE_PORT) {
- br_dev = netdev_master_upper_dev_get(dev);
- cops = br_dev->netdev_ops;
- }
- } else {
- if (dev != br_dev &&
- !(dev->priv_flags & IFF_BRIDGE_PORT))
- continue;
- if (br_dev != netdev_master_upper_dev_get(dev) &&
- !(dev->priv_flags & IFF_EBRIDGE))
- continue;
- cops = ops;
- }
- if (dev->priv_flags & IFF_BRIDGE_PORT) {
- if (cops && cops->ndo_fdb_dump)
- idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
- idx);
- }
- if (dev->netdev_ops->ndo_fdb_dump)
- idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
- idx);
- else
- idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
- cops = NULL;
- }
- cb->args[0] = idx;
- return skb->len;
- }
- static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
- unsigned int attrnum, unsigned int flag)
- {
- if (mask & flag)
- return nla_put_u8(skb, attrnum, !!(flags & flag));
- return 0;
- }
- int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
- struct net_device *dev, u16 mode,
- u32 flags, u32 mask, int nlflags,
- u32 filter_mask,
- int (*vlan_fill)(struct sk_buff *skb,
- struct net_device *dev,
- u32 filter_mask))
- {
- struct nlmsghdr *nlh;
- struct ifinfomsg *ifm;
- struct nlattr *br_afspec;
- struct nlattr *protinfo;
- u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
- struct net_device *br_dev = netdev_master_upper_dev_get(dev);
- int err = 0;
- nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
- if (nlh == NULL)
- return -EMSGSIZE;
- ifm = nlmsg_data(nlh);
- ifm->ifi_family = AF_BRIDGE;
- ifm->__ifi_pad = 0;
- ifm->ifi_type = dev->type;
- ifm->ifi_index = dev->ifindex;
- ifm->ifi_flags = dev_get_flags(dev);
- ifm->ifi_change = 0;
- if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
- nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
- nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
- (br_dev &&
- nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
- (dev->addr_len &&
- nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
- (dev->ifindex != dev_get_iflink(dev) &&
- nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
- goto nla_put_failure;
- br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
- if (!br_afspec)
- goto nla_put_failure;
- if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
- nla_nest_cancel(skb, br_afspec);
- goto nla_put_failure;
- }
- if (mode != BRIDGE_MODE_UNDEF) {
- if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
- nla_nest_cancel(skb, br_afspec);
- goto nla_put_failure;
- }
- }
- if (vlan_fill) {
- err = vlan_fill(skb, dev, filter_mask);
- if (err) {
- nla_nest_cancel(skb, br_afspec);
- goto nla_put_failure;
- }
- }
- nla_nest_end(skb, br_afspec);
- protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
- if (!protinfo)
- goto nla_put_failure;
- if (brport_nla_put_flag(skb, flags, mask,
- IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
- brport_nla_put_flag(skb, flags, mask,
- IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
- brport_nla_put_flag(skb, flags, mask,
- IFLA_BRPORT_FAST_LEAVE,
- BR_MULTICAST_FAST_LEAVE) ||
- brport_nla_put_flag(skb, flags, mask,
- IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
- brport_nla_put_flag(skb, flags, mask,
- IFLA_BRPORT_LEARNING, BR_LEARNING) ||
- brport_nla_put_flag(skb, flags, mask,
- IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
- brport_nla_put_flag(skb, flags, mask,
- IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
- brport_nla_put_flag(skb, flags, mask,
- IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
- nla_nest_cancel(skb, protinfo);
- goto nla_put_failure;
- }
- nla_nest_end(skb, protinfo);
- nlmsg_end(skb, nlh);
- return 0;
- nla_put_failure:
- nlmsg_cancel(skb, nlh);
- return err ? err : -EMSGSIZE;
- }
- EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
- static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
- {
- struct net *net = sock_net(skb->sk);
- struct net_device *dev;
- int idx = 0;
- u32 portid = NETLINK_CB(cb->skb).portid;
- u32 seq = cb->nlh->nlmsg_seq;
- u32 filter_mask = 0;
- int err;
- if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
- struct nlattr *extfilt;
- extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
- IFLA_EXT_MASK);
- if (extfilt) {
- if (nla_len(extfilt) < sizeof(filter_mask))
- return -EINVAL;
- filter_mask = nla_get_u32(extfilt);
- }
- }
- rcu_read_lock();
- for_each_netdev_rcu(net, dev) {
- const struct net_device_ops *ops = dev->netdev_ops;
- struct net_device *br_dev = netdev_master_upper_dev_get(dev);
- if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
- if (idx >= cb->args[0]) {
- err = br_dev->netdev_ops->ndo_bridge_getlink(
- skb, portid, seq, dev,
- filter_mask, NLM_F_MULTI);
- if (err < 0 && err != -EOPNOTSUPP) {
- if (likely(skb->len))
- break;
- goto out_err;
- }
- }
- idx++;
- }
- if (ops->ndo_bridge_getlink) {
- if (idx >= cb->args[0]) {
- err = ops->ndo_bridge_getlink(skb, portid,
- seq, dev,
- filter_mask,
- NLM_F_MULTI);
- if (err < 0 && err != -EOPNOTSUPP) {
- if (likely(skb->len))
- break;
- goto out_err;
- }
- }
- idx++;
- }
- }
- err = skb->len;
- out_err:
- rcu_read_unlock();
- cb->args[0] = idx;
- return err;
- }
- static inline size_t bridge_nlmsg_size(void)
- {
- return NLMSG_ALIGN(sizeof(struct ifinfomsg))
- + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
- + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
- + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
- + nla_total_size(sizeof(u32)) /* IFLA_MTU */
- + nla_total_size(sizeof(u32)) /* IFLA_LINK */
- + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
- + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
- + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
- + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
- + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
- }
- static int rtnl_bridge_notify(struct net_device *dev)
- {
- struct net *net = dev_net(dev);
- struct sk_buff *skb;
- int err = -EOPNOTSUPP;
- if (!dev->netdev_ops->ndo_bridge_getlink)
- return 0;
- skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
- if (!skb) {
- err = -ENOMEM;
- goto errout;
- }
- err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
- if (err < 0)
- goto errout;
- if (!skb->len)
- goto errout;
- rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
- return 0;
- errout:
- WARN_ON(err == -EMSGSIZE);
- kfree_skb(skb);
- if (err)
- rtnl_set_sk_err(net, RTNLGRP_LINK, err);
- return err;
- }
- static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
- {
- struct net *net = sock_net(skb->sk);
- struct ifinfomsg *ifm;
- struct net_device *dev;
- struct nlattr *br_spec, *attr = NULL;
- int rem, err = -EOPNOTSUPP;
- u16 flags = 0;
- bool have_flags = false;
- if (nlmsg_len(nlh) < sizeof(*ifm))
- return -EINVAL;
- ifm = nlmsg_data(nlh);
- if (ifm->ifi_family != AF_BRIDGE)
- return -EPFNOSUPPORT;
- dev = __dev_get_by_index(net, ifm->ifi_index);
- if (!dev) {
- pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
- return -ENODEV;
- }
- br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
- if (br_spec) {
- nla_for_each_nested(attr, br_spec, rem) {
- if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
- if (nla_len(attr) < sizeof(flags))
- return -EINVAL;
- have_flags = true;
- flags = nla_get_u16(attr);
- break;
- }
- }
- }
- if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
- struct net_device *br_dev = netdev_master_upper_dev_get(dev);
- if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
- err = -EOPNOTSUPP;
- goto out;
- }
- err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
- if (err)
- goto out;
- flags &= ~BRIDGE_FLAGS_MASTER;
- }
- if ((flags & BRIDGE_FLAGS_SELF)) {
- if (!dev->netdev_ops->ndo_bridge_setlink)
- err = -EOPNOTSUPP;
- else
- err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
- flags);
- if (!err) {
- flags &= ~BRIDGE_FLAGS_SELF;
- /* Generate event to notify upper layer of bridge
- * change
- */
- err = rtnl_bridge_notify(dev);
- }
- }
- if (have_flags)
- memcpy(nla_data(attr), &flags, sizeof(flags));
- out:
- return err;
- }
- static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
- {
- struct net *net = sock_net(skb->sk);
- struct ifinfomsg *ifm;
- struct net_device *dev;
- struct nlattr *br_spec, *attr = NULL;
- int rem, err = -EOPNOTSUPP;
- u16 flags = 0;
- bool have_flags = false;
- if (nlmsg_len(nlh) < sizeof(*ifm))
- return -EINVAL;
- ifm = nlmsg_data(nlh);
- if (ifm->ifi_family != AF_BRIDGE)
- return -EPFNOSUPPORT;
- dev = __dev_get_by_index(net, ifm->ifi_index);
- if (!dev) {
- pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
- return -ENODEV;
- }
- br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
- if (br_spec) {
- nla_for_each_nested(attr, br_spec, rem) {
- if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
- if (nla_len(attr) < sizeof(flags))
- return -EINVAL;
- have_flags = true;
- flags = nla_get_u16(attr);
- break;
- }
- }
- }
- if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
- struct net_device *br_dev = netdev_master_upper_dev_get(dev);
- if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
- err = -EOPNOTSUPP;
- goto out;
- }
- err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
- if (err)
- goto out;
- flags &= ~BRIDGE_FLAGS_MASTER;
- }
- if ((flags & BRIDGE_FLAGS_SELF)) {
- if (!dev->netdev_ops->ndo_bridge_dellink)
- err = -EOPNOTSUPP;
- else
- err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
- flags);
- if (!err) {
- flags &= ~BRIDGE_FLAGS_SELF;
- /* Generate event to notify upper layer of bridge
- * change
- */
- err = rtnl_bridge_notify(dev);
- }
- }
- if (have_flags)
- memcpy(nla_data(attr), &flags, sizeof(flags));
- out:
- return err;
- }
- /* Process one rtnetlink message. */
- static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
- {
- struct net *net = sock_net(skb->sk);
- rtnl_doit_func doit;
- int sz_idx, kind;
- int family;
- int type;
- int err;
- type = nlh->nlmsg_type;
- if (type > RTM_MAX)
- return -EOPNOTSUPP;
- type -= RTM_BASE;
- /* All the messages must have at least 1 byte length */
- if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
- return 0;
- family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
- sz_idx = type>>2;
- kind = type&3;
- if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
- return -EPERM;
- if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
- struct sock *rtnl;
- rtnl_dumpit_func dumpit;
- rtnl_calcit_func calcit;
- u16 min_dump_alloc = 0;
- dumpit = rtnl_get_dumpit(family, type);
- if (dumpit == NULL)
- return -EOPNOTSUPP;
- calcit = rtnl_get_calcit(family, type);
- if (calcit)
- min_dump_alloc = calcit(skb, nlh);
- __rtnl_unlock();
- rtnl = net->rtnl;
- {
- struct netlink_dump_control c = {
- .dump = dumpit,
- .min_dump_alloc = min_dump_alloc,
- };
- err = netlink_dump_start(rtnl, skb, nlh, &c);
- }
- rtnl_lock();
- return err;
- }
- doit = rtnl_get_doit(family, type);
- if (doit == NULL)
- return -EOPNOTSUPP;
- return doit(skb, nlh);
- }
- static void rtnetlink_rcv(struct sk_buff *skb)
- {
- rtnl_lock();
- netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
- rtnl_unlock();
- }
- static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
- {
- struct net_device *dev = netdev_notifier_info_to_dev(ptr);
- switch (event) {
- case NETDEV_UP:
- case NETDEV_DOWN:
- case NETDEV_PRE_UP:
- case NETDEV_POST_INIT:
- case NETDEV_REGISTER:
- case NETDEV_CHANGE:
- case NETDEV_PRE_TYPE_CHANGE:
- case NETDEV_GOING_DOWN:
- case NETDEV_UNREGISTER:
- case NETDEV_UNREGISTER_FINAL:
- case NETDEV_RELEASE:
- case NETDEV_JOIN:
- case NETDEV_BONDING_INFO:
- break;
- default:
- rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
- break;
- }
- return NOTIFY_DONE;
- }
- static struct notifier_block rtnetlink_dev_notifier = {
- .notifier_call = rtnetlink_event,
- };
- static int __net_init rtnetlink_net_init(struct net *net)
- {
- struct sock *sk;
- struct netlink_kernel_cfg cfg = {
- .groups = RTNLGRP_MAX,
- .input = rtnetlink_rcv,
- .cb_mutex = &rtnl_mutex,
- .flags = NL_CFG_F_NONROOT_RECV,
- };
- sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
- if (!sk)
- return -ENOMEM;
- net->rtnl = sk;
- return 0;
- }
- static void __net_exit rtnetlink_net_exit(struct net *net)
- {
- netlink_kernel_release(net->rtnl);
- net->rtnl = NULL;
- }
- static struct pernet_operations rtnetlink_net_ops = {
- .init = rtnetlink_net_init,
- .exit = rtnetlink_net_exit,
- };
- void __init rtnetlink_init(void)
- {
- if (register_pernet_subsys(&rtnetlink_net_ops))
- panic("rtnetlink_init: cannot initialize rtnetlink\n");
- register_netdevice_notifier(&rtnetlink_dev_notifier);
- rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
- rtnl_dump_ifinfo, rtnl_calcit);
- rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
- rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
- rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
- rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
- rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
- rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
- rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
- rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
- rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
- rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
- rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
- }
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