| /* |
| * 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); |
| |
| static struct sk_buff *defer_kfree_skb_list; |
| void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail) |
| { |
| if (head && tail) { |
| tail->next = defer_kfree_skb_list; |
| defer_kfree_skb_list = head; |
| } |
| } |
| EXPORT_SYMBOL(rtnl_kfree_skbs); |
| |
| void __rtnl_unlock(void) |
| { |
| struct sk_buff *head = defer_kfree_skb_list; |
| |
| defer_kfree_skb_list = NULL; |
| |
| mutex_unlock(&rtnl_mutex); |
| |
| while (head) { |
| struct sk_buff *next = head->next; |
| |
| kfree_skb(head); |
| cond_resched(); |
| head = next; |
| } |
| } |
| |
| 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; |
| |
| a->rx_nohandler = b->rx_nohandler; |
| } |
| |
| /* 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_64bit(sizeof(__u64)) + |
| /* IFLA_VF_STATS_TX_PACKETS */ |
| nla_total_size_64bit(sizeof(__u64)) + |
| /* IFLA_VF_STATS_RX_BYTES */ |
| nla_total_size_64bit(sizeof(__u64)) + |
| /* IFLA_VF_STATS_TX_BYTES */ |
| nla_total_size_64bit(sizeof(__u64)) + |
| /* IFLA_VF_STATS_BROADCAST */ |
| nla_total_size_64bit(sizeof(__u64)) + |
| /* IFLA_VF_STATS_MULTICAST */ |
| nla_total_size_64bit(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_64bit(sizeof(struct rtnl_link_ifmap)) |
| + nla_total_size(sizeof(struct rtnl_link_stats)) |
| + nla_total_size_64bit(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(4) /* IFLA_MAX_GSO_SEGS */ |
| + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */ |
| + 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(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(skb, IFLA_PHYS_PORT_NAME, strlen(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 = { |
| .orig_dev = dev, |
| .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) |
| { |
| struct rtnl_link_stats64 *sp; |
| struct nlattr *attr; |
| |
| attr = nla_reserve_64bit(skb, IFLA_STATS64, |
| sizeof(struct rtnl_link_stats64), IFLA_PAD); |
| if (!attr) |
| return -EMSGSIZE; |
| |
| sp = nla_data(attr); |
| dev_get_stats(dev, sp); |
| |
| attr = nla_reserve(skb, IFLA_STATS, |
| sizeof(struct rtnl_link_stats)); |
| if (!attr) |
| return -EMSGSIZE; |
| |
| copy_rtnl_link_stats(nla_data(attr), sp); |
| |
| 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; |
| |
| /* 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; |
| memset(ivi.mac, 0, sizeof(ivi.mac)); |
| /* 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_64bit(skb, IFLA_VF_STATS_RX_PACKETS, |
| vf_stats.rx_packets, IFLA_VF_STATS_PAD) || |
| nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, |
| vf_stats.tx_packets, IFLA_VF_STATS_PAD) || |
| nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, |
| vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || |
| nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, |
| vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || |
| nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, |
| vf_stats.broadcast, IFLA_VF_STATS_PAD) || |
| nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, |
| vf_stats.multicast, IFLA_VF_STATS_PAD)) |
| 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_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) |
| 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) || |
| nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || |
| nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || |
| #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 }, |
| }; |
| |
| 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) }, |
| [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, |
| [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, |
| }; |
| |
| 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 const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) |
| { |
| const struct rtnl_link_ops *ops = NULL; |
| struct nlattr *linfo[IFLA_INFO_MAX + 1]; |
| |
| if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0) |
| return NULL; |
| |
| if (linfo[IFLA_INFO_KIND]) { |
| char kind[MODULE_NAME_LEN]; |
| |
| nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); |
| ops = rtnl_link_ops_get(kind); |
| } |
| |
| return ops; |
| } |
| |
| static bool link_master_filtered(struct net_device *dev, int master_idx) |
| { |
| struct net_device *master; |
| |
| if (!master_idx) |
| return false; |
| |
| master = netdev_master_upper_dev_get(dev); |
| if (!master || master->ifindex != master_idx) |
| return true; |
| |
| return false; |
| } |
| |
| static bool link_kind_filtered(const struct net_device *dev, |
| const struct rtnl_link_ops *kind_ops) |
| { |
| if (kind_ops && dev->rtnl_link_ops != kind_ops) |
| return true; |
| |
| return false; |
| } |
| |
| static bool link_dump_filtered(struct net_device *dev, |
| int master_idx, |
| const struct rtnl_link_ops *kind_ops) |
| { |
| if (link_master_filtered(dev, master_idx) || |
| link_kind_filtered(dev, kind_ops)) |
| return true; |
| |
| return false; |
| } |
| |
| 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; |
| const struct rtnl_link_ops *kind_ops = NULL; |
| unsigned int flags = NLM_F_MULTI; |
| int master_idx = 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]); |
| |
| if (tb[IFLA_MASTER]) |
| master_idx = nla_get_u32(tb[IFLA_MASTER]); |
| |
| if (tb[IFLA_LINKINFO]) |
| kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); |
| |
| if (master_idx || kind_ops) |
| flags |= NLM_F_DUMP_FILTERED; |
| } |
| |
| 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 (link_dump_filtered(dev, master_idx, kind_ops)) |
| continue; |
| if (idx < s_idx) |
| goto cont; |
| err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, |
| NETLINK_CB(cb->skb).portid, |
| cb->nlh->nlmsg_seq, 0, |
| flags, |
| ext_filter_mask); |
| /* If we ran out of room on the first message, |
| * we're in trouble |
| */ |
| WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); |
| |
| if (err < 0) |
| goto out; |
| |
| nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
| cont: |
| idx++; |
| } |
| } |
| out: |
| cb->args[1] = idx; |
| cb->args[0] = h; |
| |
| return skb->len; |
| } |
| |
| 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 handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, |
| int guid_type) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| |
| return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); |
| } |
| |
| static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) |
| { |
| if (dev->type != ARPHRD_INFINIBAND) |
| return -EOPNOTSUPP; |
| |
| return handle_infiniband_guid(dev, ivt, guid_type); |
| } |
| |
| 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; |
| } |
| |
| if (tb[IFLA_VF_IB_NODE_GUID]) { |
| struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); |
| |
| if (!ops->ndo_set_vf_guid) |
| return -EOPNOTSUPP; |
| |
| return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); |
| } |
| |
| if (tb[IFLA_VF_IB_PORT_GUID]) { |
| struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); |
| |
| if (!ops->ndo_set_vf_guid) |
| return -EOPNOTSUPP; |
| |
| return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); |
| } |
| |
| 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; |
| |
| 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) + dev->addr_len; |
| 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]); |
| unsigned long orig_len = dev->tx_queue_len; |
| |
| if (dev->tx_queue_len ^ value) { |
| dev->tx_queue_len = value; |
| err = call_netdevice_notifiers( |
| NETDEV_CHANGE_TX_QUEUE_LEN, dev); |
| err = notifier_to_errno(err); |
| if (err) { |
| dev->tx_queue_len = orig_len; |
| goto errout; |
| } |
| status |= DO_SETLINK_NOTIFY; |
| } |
| } |
| |
| 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 = validate_linkmsg(dev, tb); |
| if (err < 0) |
| 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; |
| } |
| |
| 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(); |
| |
| 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, u16 ndm_state) |
| { |
| 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 = ndm_state; |
| |
| 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); |
| } |
| |
| static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, |
| u16 ndm_state) |
| { |
| 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, ndm_state); |
| 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; |
| } |
| |
| 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_state); |
| 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; |
| } |
| |
| 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_state); |
| 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, NUD_PERMANENT); |
| 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; |
| |
| 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); |
| cb->args[1] = err; |
| 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; |
| } |
| |
| cb->args[1] = 0; |
| 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 (cb->args[1] == -EMSGSIZE) |
| break; |
| |
| 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); |
| if (cb->args[1] == -EMSGSIZE) |
| break; |
| |
| 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) |
| break; |
| } |
| 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) |
| break; |
| } |
| idx++; |
| } |
| } |
| rcu_read_unlock(); |
| cb->args[0] = idx; |
| |
| return skb->len; |
| } |
| |
| 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; |
| } |
| |
| static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) |
| { |
| return (mask & IFLA_STATS_FILTER_BIT(attrid)) && |
| (!idxattr || idxattr == attrid); |
| } |
| |
| static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, |
| int type, u32 pid, u32 seq, u32 change, |
| unsigned int flags, unsigned int filter_mask, |
| int *idxattr, int *prividx) |
| { |
| struct if_stats_msg *ifsm; |
| struct nlmsghdr *nlh; |
| struct nlattr *attr; |
| int s_prividx = *prividx; |
| |
| ASSERT_RTNL(); |
| |
| nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); |
| if (!nlh) |
| return -EMSGSIZE; |
| |
| ifsm = nlmsg_data(nlh); |
| ifsm->ifindex = dev->ifindex; |
| ifsm->filter_mask = filter_mask; |
| |
| if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { |
| struct rtnl_link_stats64 *sp; |
| |
| attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, |
| sizeof(struct rtnl_link_stats64), |
| IFLA_STATS_UNSPEC); |
| if (!attr) |
| goto nla_put_failure; |
| |
| sp = nla_data(attr); |
| dev_get_stats(dev, sp); |
| } |
| |
| if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { |
| const struct rtnl_link_ops *ops = dev->rtnl_link_ops; |
| |
| if (ops && ops->fill_linkxstats) { |
| int err; |
| |
| *idxattr = IFLA_STATS_LINK_XSTATS; |
| attr = nla_nest_start(skb, |
| IFLA_STATS_LINK_XSTATS); |
| if (!attr) |
| goto nla_put_failure; |
| |
| err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); |
| nla_nest_end(skb, attr); |
| if (err) |
| goto nla_put_failure; |
| *idxattr = 0; |
| } |
| } |
| |
| if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, |
| *idxattr)) { |
| const struct rtnl_link_ops *ops = NULL; |
| const struct net_device *master; |
| |
| master = netdev_master_upper_dev_get(dev); |
| if (master) |
| ops = master->rtnl_link_ops; |
| if (ops && ops->fill_linkxstats) { |
| int err; |
| |
| *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; |
| attr = nla_nest_start(skb, |
| IFLA_STATS_LINK_XSTATS_SLAVE); |
| if (!attr) |
| goto nla_put_failure; |
| |
| err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); |
| nla_nest_end(skb, attr); |
| if (err) |
| goto nla_put_failure; |
| *idxattr = 0; |
| } |
| } |
| |
| nlmsg_end(skb, nlh); |
| |
| return 0; |
| |
| nla_put_failure: |
| /* not a multi message or no progress mean a real error */ |
| if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) |
| nlmsg_cancel(skb, nlh); |
| else |
| nlmsg_end(skb, nlh); |
| |
| return -EMSGSIZE; |
| } |
| |
| static const struct nla_policy ifla_stats_policy[IFLA_STATS_MAX + 1] = { |
| [IFLA_STATS_LINK_64] = { .len = sizeof(struct rtnl_link_stats64) }, |
| }; |
| |
| static size_t if_nlmsg_stats_size(const struct net_device *dev, |
| u32 filter_mask) |
| { |
| size_t size = 0; |
| |
| if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) |
| size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); |
| |
| if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { |
| const struct rtnl_link_ops *ops = dev->rtnl_link_ops; |
| int attr = IFLA_STATS_LINK_XSTATS; |
| |
| if (ops && ops->get_linkxstats_size) { |
| size += nla_total_size(ops->get_linkxstats_size(dev, |
| attr)); |
| /* for IFLA_STATS_LINK_XSTATS */ |
| size += nla_total_size(0); |
| } |
| } |
| |
| if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { |
| struct net_device *_dev = (struct net_device *)dev; |
| const struct rtnl_link_ops *ops = NULL; |
| const struct net_device *master; |
| |
| /* netdev_master_upper_dev_get can't take const */ |
| master = netdev_master_upper_dev_get(_dev); |
| if (master) |
| ops = master->rtnl_link_ops; |
| if (ops && ops->get_linkxstats_size) { |
| int attr = IFLA_STATS_LINK_XSTATS_SLAVE; |
| |
| size += nla_total_size(ops->get_linkxstats_size(dev, |
| attr)); |
| /* for IFLA_STATS_LINK_XSTATS_SLAVE */ |
| size += nla_total_size(0); |
| } |
| } |
| |
| return size; |
| } |
| |
| static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh) |
| { |
| struct net *net = sock_net(skb->sk); |
| struct net_device *dev = NULL; |
| int idxattr = 0, prividx = 0; |
| struct if_stats_msg *ifsm; |
| struct sk_buff *nskb; |
| u32 filter_mask; |
| int err; |
| |
| ifsm = nlmsg_data(nlh); |
| if (ifsm->ifindex > 0) |
| dev = __dev_get_by_index(net, ifsm->ifindex); |
| else |
| return -EINVAL; |
| |
| if (!dev) |
| return -ENODEV; |
| |
| filter_mask = ifsm->filter_mask; |
| if (!filter_mask) |
| return -EINVAL; |
| |
| nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); |
| if (!nskb) |
| return -ENOBUFS; |
| |
| err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, |
| NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, |
| 0, filter_mask, &idxattr, &prividx); |
| if (err < 0) { |
| /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ |
| WARN_ON(err == -EMSGSIZE); |
| kfree_skb(nskb); |
| } else { |
| err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); |
| } |
| |
| return err; |
| } |
| |
| static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| { |
| int h, s_h, err, s_idx, s_idxattr, s_prividx; |
| struct net *net = sock_net(skb->sk); |
| unsigned int flags = NLM_F_MULTI; |
| struct if_stats_msg *ifsm; |
| struct hlist_head *head; |
| struct net_device *dev; |
| u32 filter_mask = 0; |
| int idx = 0; |
| |
| s_h = cb->args[0]; |
| s_idx = cb->args[1]; |
| s_idxattr = cb->args[2]; |
| s_prividx = cb->args[3]; |
| |
| cb->seq = net->dev_base_seq; |
| |
| ifsm = nlmsg_data(cb->nlh); |
| filter_mask = ifsm->filter_mask; |
| if (!filter_mask) |
| return -EINVAL; |
| |
| 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_statsinfo(skb, dev, RTM_NEWSTATS, |
| NETLINK_CB(cb->skb).portid, |
| cb->nlh->nlmsg_seq, 0, |
| flags, filter_mask, |
| &s_idxattr, &s_prividx); |
| /* If we ran out of room on the first message, |
| * we're in trouble |
| */ |
| WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); |
| |
| if (err < 0) |
| goto out; |
| s_prividx = 0; |
| s_idxattr = 0; |
| nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
| cont: |
| idx++; |
| } |
| } |
| out: |
| cb->args[3] = s_prividx; |
| cb->args[2] = s_idxattr; |
| cb->args[1] = idx; |
| cb->args[0] = h; |
| |
| return skb->len; |
| } |
| |
| /* 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 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; |
| 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); |
| |
| rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, |
| NULL); |
| } |