| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * 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> |
| * |
| * Fixes: |
| * Vitaly E. Lavrov RTA_OK arithmetic was wrong. |
| */ |
| |
| #include <linux/bitops.h> |
| #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 <linux/bpf.h> |
| |
| #include <linux/uaccess.h> |
| |
| #include <linux/inet.h> |
| #include <linux/netdevice.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> |
| #include <net/devlink.h> |
| #if IS_ENABLED(CONFIG_IPV6) |
| #include <net/addrconf.h> |
| #endif |
| #include <linux/dpll.h> |
| |
| #include "dev.h" |
| |
| #define RTNL_MAX_TYPE 50 |
| #define RTNL_SLAVE_MAX_TYPE 44 |
| |
| struct rtnl_link { |
| rtnl_doit_func doit; |
| rtnl_dumpit_func dumpit; |
| struct module *owner; |
| unsigned int flags; |
| struct rcu_head rcu; |
| }; |
| |
| static DEFINE_MUTEX(rtnl_mutex); |
| |
| void rtnl_lock(void) |
| { |
| mutex_lock(&rtnl_mutex); |
| } |
| EXPORT_SYMBOL(rtnl_lock); |
| |
| int rtnl_lock_killable(void) |
| { |
| return mutex_lock_killable(&rtnl_mutex); |
| } |
| EXPORT_SYMBOL(rtnl_lock_killable); |
| |
| 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; |
| |
| /* Ensure that we didn't actually add any TODO item when __rtnl_unlock() |
| * is used. In some places, e.g. in cfg80211, we have code that will do |
| * something like |
| * rtnl_lock() |
| * wiphy_lock() |
| * ... |
| * rtnl_unlock() |
| * |
| * and because netdev_run_todo() acquires the RTNL for items on the list |
| * we could cause a situation such as this: |
| * Thread 1 Thread 2 |
| * rtnl_lock() |
| * unregister_netdevice() |
| * __rtnl_unlock() |
| * rtnl_lock() |
| * wiphy_lock() |
| * rtnl_unlock() |
| * netdev_run_todo() |
| * __rtnl_unlock() |
| * |
| * // list not empty now |
| * // because of thread 2 |
| * rtnl_lock() |
| * while (!list_empty(...)) |
| * rtnl_lock() |
| * wiphy_lock() |
| * **** DEADLOCK **** |
| * |
| * However, usage of __rtnl_unlock() is rare, and so we can ensure that |
| * it's not used in cases where something is added to do the list. |
| */ |
| WARN_ON(!list_empty(&net_todo_list)); |
| |
| 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); |
| |
| bool refcount_dec_and_rtnl_lock(refcount_t *r) |
| { |
| return refcount_dec_and_mutex_lock(r, &rtnl_mutex); |
| } |
| EXPORT_SYMBOL(refcount_dec_and_rtnl_lock); |
| |
| #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 */ |
| |
| #ifdef CONFIG_DEBUG_NET_SMALL_RTNL |
| void __rtnl_net_lock(struct net *net) |
| { |
| ASSERT_RTNL(); |
| |
| mutex_lock(&net->rtnl_mutex); |
| } |
| EXPORT_SYMBOL(__rtnl_net_lock); |
| |
| void __rtnl_net_unlock(struct net *net) |
| { |
| ASSERT_RTNL(); |
| |
| mutex_unlock(&net->rtnl_mutex); |
| } |
| EXPORT_SYMBOL(__rtnl_net_unlock); |
| |
| void rtnl_net_lock(struct net *net) |
| { |
| rtnl_lock(); |
| __rtnl_net_lock(net); |
| } |
| EXPORT_SYMBOL(rtnl_net_lock); |
| |
| void rtnl_net_unlock(struct net *net) |
| { |
| __rtnl_net_unlock(net); |
| rtnl_unlock(); |
| } |
| EXPORT_SYMBOL(rtnl_net_unlock); |
| |
| static int rtnl_net_cmp_locks(const struct net *net_a, const struct net *net_b) |
| { |
| if (net_eq(net_a, net_b)) |
| return 0; |
| |
| /* always init_net first */ |
| if (net_eq(net_a, &init_net)) |
| return -1; |
| |
| if (net_eq(net_b, &init_net)) |
| return 1; |
| |
| /* otherwise lock in ascending order */ |
| return net_a < net_b ? -1 : 1; |
| } |
| |
| int rtnl_net_lock_cmp_fn(const struct lockdep_map *a, const struct lockdep_map *b) |
| { |
| const struct net *net_a, *net_b; |
| |
| net_a = container_of(a, struct net, rtnl_mutex.dep_map); |
| net_b = container_of(b, struct net, rtnl_mutex.dep_map); |
| |
| return rtnl_net_cmp_locks(net_a, net_b); |
| } |
| |
| bool rtnl_net_is_locked(struct net *net) |
| { |
| return rtnl_is_locked() && mutex_is_locked(&net->rtnl_mutex); |
| } |
| EXPORT_SYMBOL(rtnl_net_is_locked); |
| |
| bool lockdep_rtnl_net_is_held(struct net *net) |
| { |
| return lockdep_rtnl_is_held() && lockdep_is_held(&net->rtnl_mutex); |
| } |
| EXPORT_SYMBOL(lockdep_rtnl_net_is_held); |
| #endif |
| |
| static struct rtnl_link __rcu *__rcu *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 struct rtnl_link *rtnl_get_link(int protocol, int msgtype) |
| { |
| struct rtnl_link __rcu **tab; |
| |
| if (protocol >= ARRAY_SIZE(rtnl_msg_handlers)) |
| protocol = PF_UNSPEC; |
| |
| tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]); |
| if (!tab) |
| tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]); |
| |
| return rcu_dereference_rtnl(tab[msgtype]); |
| } |
| |
| static int rtnl_register_internal(struct module *owner, |
| int protocol, int msgtype, |
| rtnl_doit_func doit, rtnl_dumpit_func dumpit, |
| unsigned int flags) |
| { |
| struct rtnl_link *link, *old; |
| struct rtnl_link __rcu **tab; |
| int msgindex; |
| int ret = -ENOBUFS; |
| |
| BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
| msgindex = rtm_msgindex(msgtype); |
| |
| rtnl_lock(); |
| tab = rtnl_dereference(rtnl_msg_handlers[protocol]); |
| if (tab == NULL) { |
| tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL); |
| if (!tab) |
| goto unlock; |
| |
| /* ensures we see the 0 stores */ |
| rcu_assign_pointer(rtnl_msg_handlers[protocol], tab); |
| } |
| |
| old = rtnl_dereference(tab[msgindex]); |
| if (old) { |
| link = kmemdup(old, sizeof(*old), GFP_KERNEL); |
| if (!link) |
| goto unlock; |
| } else { |
| link = kzalloc(sizeof(*link), GFP_KERNEL); |
| if (!link) |
| goto unlock; |
| } |
| |
| WARN_ON(link->owner && link->owner != owner); |
| link->owner = owner; |
| |
| WARN_ON(doit && link->doit && link->doit != doit); |
| if (doit) |
| link->doit = doit; |
| WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit); |
| if (dumpit) |
| link->dumpit = dumpit; |
| |
| WARN_ON(rtnl_msgtype_kind(msgtype) != RTNL_KIND_DEL && |
| (flags & RTNL_FLAG_BULK_DEL_SUPPORTED)); |
| link->flags |= flags; |
| |
| /* publish protocol:msgtype */ |
| rcu_assign_pointer(tab[msgindex], link); |
| ret = 0; |
| if (old) |
| kfree_rcu(old, rcu); |
| unlock: |
| rtnl_unlock(); |
| return ret; |
| } |
| |
| /** |
| * rtnl_register_module - Register a rtnetlink message type |
| * |
| * @owner: module registering the hook (THIS_MODULE) |
| * @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 |
| * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions |
| * |
| * Like rtnl_register, but for use by removable modules. |
| */ |
| int rtnl_register_module(struct module *owner, |
| int protocol, int msgtype, |
| rtnl_doit_func doit, rtnl_dumpit_func dumpit, |
| unsigned int flags) |
| { |
| return rtnl_register_internal(owner, protocol, msgtype, |
| doit, dumpit, flags); |
| } |
| EXPORT_SYMBOL_GPL(rtnl_register_module); |
| |
| /** |
| * 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 |
| * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions |
| * |
| * 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. |
| */ |
| void rtnl_register(int protocol, int msgtype, |
| rtnl_doit_func doit, rtnl_dumpit_func dumpit, |
| unsigned int flags) |
| { |
| int err; |
| |
| err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit, |
| flags); |
| if (err) |
| pr_err("Unable to register rtnetlink message handler, " |
| "protocol = %d, message type = %d\n", protocol, msgtype); |
| } |
| |
| /** |
| * 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) |
| { |
| struct rtnl_link __rcu **tab; |
| struct rtnl_link *link; |
| int msgindex; |
| |
| BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
| msgindex = rtm_msgindex(msgtype); |
| |
| rtnl_lock(); |
| tab = rtnl_dereference(rtnl_msg_handlers[protocol]); |
| if (!tab) { |
| rtnl_unlock(); |
| return -ENOENT; |
| } |
| |
| link = rcu_replace_pointer_rtnl(tab[msgindex], NULL); |
| rtnl_unlock(); |
| |
| kfree_rcu(link, rcu); |
| |
| 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) |
| { |
| struct rtnl_link __rcu **tab; |
| struct rtnl_link *link; |
| int msgindex; |
| |
| BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
| |
| rtnl_lock(); |
| tab = rcu_replace_pointer_rtnl(rtnl_msg_handlers[protocol], NULL); |
| if (!tab) { |
| rtnl_unlock(); |
| return; |
| } |
| for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) { |
| link = rcu_replace_pointer_rtnl(tab[msgindex], NULL); |
| kfree_rcu(link, rcu); |
| } |
| rtnl_unlock(); |
| |
| synchronize_net(); |
| |
| kfree(tab); |
| } |
| EXPORT_SYMBOL_GPL(rtnl_unregister_all); |
| |
| int __rtnl_register_many(const struct rtnl_msg_handler *handlers, int n) |
| { |
| const struct rtnl_msg_handler *handler; |
| int i, err; |
| |
| for (i = 0, handler = handlers; i < n; i++, handler++) { |
| err = rtnl_register_internal(handler->owner, handler->protocol, |
| handler->msgtype, handler->doit, |
| handler->dumpit, handler->flags); |
| if (err) { |
| __rtnl_unregister_many(handlers, i); |
| break; |
| } |
| } |
| |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(__rtnl_register_many); |
| |
| void __rtnl_unregister_many(const struct rtnl_msg_handler *handlers, int n) |
| { |
| const struct rtnl_msg_handler *handler; |
| int i; |
| |
| for (i = n - 1, handler = handlers + n - 1; i >= 0; i--, handler--) |
| rtnl_unregister(handler->protocol, handler->msgtype); |
| } |
| EXPORT_SYMBOL_GPL(__rtnl_unregister_many); |
| |
| 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 alloc/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->alloc || 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; |
| |
| /* Sanity-check max sizes to avoid stack buffer overflow. */ |
| if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE || |
| ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)) |
| return -EINVAL; |
| |
| 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 and guarantee net_namespace_list |
| * integrity (hold pernet_ops_rwsem for writing to close the race |
| * with setup_net() and cleanup_net()). |
| */ |
| 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) |
| { |
| DEFINE_WAIT_FUNC(wait, woken_wake_function); |
| |
| add_wait_queue(&netdev_unregistering_wq, &wait); |
| for (;;) { |
| rtnl_lock(); |
| /* We held write locked pernet_ops_rwsem, and parallel |
| * setup_net() and cleanup_net() are not possible. |
| */ |
| if (!atomic_read(&dev_unreg_count)) |
| 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 setup_net() and cleanup_net() */ |
| down_write(&pernet_ops_rwsem); |
| rtnl_lock_unregistering_all(); |
| __rtnl_link_unregister(ops); |
| rtnl_unlock(); |
| up_write(&pernet_ops_rwsem); |
| } |
| 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; |
| size_t size = 0; |
| |
| rcu_read_lock(); |
| |
| master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); |
| if (!master_dev) |
| goto out; |
| |
| ops = master_dev->rtnl_link_ops; |
| if (!ops || !ops->get_slave_size) |
| goto out; |
| /* IFLA_INFO_SLAVE_DATA + nested data */ |
| size = nla_total_size(sizeof(struct nlattr)) + |
| ops->get_slave_size(master_dev, dev); |
| |
| out: |
| rcu_read_unlock(); |
| return size; |
| } |
| |
| 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; |
| |
| ASSERT_RTNL(); |
| |
| 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_rcu(&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 |
| */ |
| void rtnl_af_unregister(struct rtnl_af_ops *ops) |
| { |
| rtnl_lock(); |
| list_del_rcu(&ops->list); |
| rtnl_unlock(); |
| |
| synchronize_rcu(); |
| } |
| 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)); |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(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); |
| } |
| } |
| rcu_read_unlock(); |
| |
| return size; |
| } |
| |
| static bool rtnl_have_link_slave_info(const struct net_device *dev) |
| { |
| struct net_device *master_dev; |
| bool ret = false; |
| |
| rcu_read_lock(); |
| |
| master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); |
| if (master_dev && master_dev->rtnl_link_ops) |
| ret = true; |
| rcu_read_unlock(); |
| return ret; |
| } |
| |
| 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_noflag(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_noflag(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_noflag(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; |
| |
| return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL); |
| } |
| |
| 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, |
| const struct nlmsghdr *nlh, gfp_t flags) |
| { |
| struct sock *rtnl = net->rtnl; |
| |
| nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), 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; |
| |
| /* nothing is dumped for dst_default_metrics, so just skip the loop */ |
| if (metrics == dst_default_metrics.metrics) |
| return 0; |
| |
| mx = nla_nest_start_noflag(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; |
| |
| if (!user_features) |
| continue; |
| 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_error = error, |
| .rta_id = id, |
| }; |
| |
| if (dst) { |
| ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse); |
| ci.rta_used = dst->__use; |
| ci.rta_clntref = rcuref_read(&dst->__rcuref); |
| } |
| 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); |
| |
| void netdev_set_operstate(struct net_device *dev, int newstate) |
| { |
| unsigned int old = READ_ONCE(dev->operstate); |
| |
| do { |
| if (old == newstate) |
| return; |
| } while (!try_cmpxchg(&dev->operstate, &old, newstate)); |
| |
| netdev_state_change(dev); |
| } |
| EXPORT_SYMBOL(netdev_set_operstate); |
| |
| static void set_operstate(struct net_device *dev, unsigned char transition) |
| { |
| unsigned char operstate = READ_ONCE(dev->operstate); |
| |
| switch (transition) { |
| case IF_OPER_UP: |
| if ((operstate == IF_OPER_DORMANT || |
| operstate == IF_OPER_TESTING || |
| operstate == IF_OPER_UNKNOWN) && |
| !netif_dormant(dev) && !netif_testing(dev)) |
| operstate = IF_OPER_UP; |
| break; |
| |
| case IF_OPER_TESTING: |
| if (netif_oper_up(dev)) |
| operstate = IF_OPER_TESTING; |
| break; |
| |
| case IF_OPER_DORMANT: |
| if (netif_oper_up(dev)) |
| operstate = IF_OPER_DORMANT; |
| break; |
| } |
| |
| netdev_set_operstate(dev, operstate); |
| } |
| |
| 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 && (ext_filter_mask & RTEXT_FILTER_VF)) { |
| int num_vfs = dev_num_vf(dev->dev.parent); |
| size_t size = nla_total_size(0); |
| size += num_vfs * |
| (nla_total_size(0) + |
| nla_total_size(sizeof(struct ifla_vf_mac)) + |
| nla_total_size(sizeof(struct ifla_vf_broadcast)) + |
| nla_total_size(sizeof(struct ifla_vf_vlan)) + |
| nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */ |
| nla_total_size(MAX_VLAN_LIST_LEN * |
| sizeof(struct ifla_vf_vlan_info)) + |
| nla_total_size(sizeof(struct ifla_vf_spoofchk)) + |
| nla_total_size(sizeof(struct ifla_vf_tx_rate)) + |
| 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)) + |
| nla_total_size(sizeof(struct ifla_vf_trust))); |
| if (~ext_filter_mask & RTEXT_FILTER_SKIP_STATS) { |
| size += num_vfs * |
| (nla_total_size(0) + /* nest IFLA_VF_STATS */ |
| /* 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)) + |
| /* IFLA_VF_STATS_RX_DROPPED */ |
| nla_total_size_64bit(sizeof(__u64)) + |
| /* IFLA_VF_STATS_TX_DROPPED */ |
| nla_total_size_64bit(sizeof(__u64))); |
| } |
| 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(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 size_t rtnl_xdp_size(void) |
| { |
| size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */ |
| nla_total_size(1) + /* XDP_ATTACHED */ |
| nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */ |
| nla_total_size(4); /* XDP_<mode>_PROG_ID */ |
| |
| return xdp_size; |
| } |
| |
| static size_t rtnl_prop_list_size(const struct net_device *dev) |
| { |
| struct netdev_name_node *name_node; |
| unsigned int cnt = 0; |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(name_node, &dev->name_node->list, list) |
| cnt++; |
| rcu_read_unlock(); |
| |
| if (!cnt) |
| return 0; |
| |
| return nla_total_size(0) + cnt * nla_total_size(ALTIFNAMSIZ); |
| } |
| |
| static size_t rtnl_proto_down_size(const struct net_device *dev) |
| { |
| size_t size = nla_total_size(1); |
| |
| /* Assume dev->proto_down_reason is not zero. */ |
| size += nla_total_size(0) + nla_total_size(4); |
| |
| return size; |
| } |
| |
| static size_t rtnl_devlink_port_size(const struct net_device *dev) |
| { |
| size_t size = nla_total_size(0); /* nest IFLA_DEVLINK_PORT */ |
| |
| if (dev->devlink_port) |
| size += devlink_nl_port_handle_size(dev->devlink_port); |
| |
| return size; |
| } |
| |
| static size_t rtnl_dpll_pin_size(const struct net_device *dev) |
| { |
| size_t size = nla_total_size(0); /* nest IFLA_DPLL_PIN */ |
| |
| size += dpll_netdev_pin_handle_size(dev); |
| |
| return 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_ALLMULTI */ |
| + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ |
| + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ |
| + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ |
| + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ |
| + nla_total_size(4) /* IFLA_GRO_MAX_SIZE */ |
| + nla_total_size(4) /* IFLA_GSO_IPV4_MAX_SIZE */ |
| + nla_total_size(4) /* IFLA_GRO_IPV4_MAX_SIZE */ |
| + nla_total_size(4) /* IFLA_TSO_MAX_SIZE */ |
| + nla_total_size(4) /* IFLA_TSO_MAX_SEGS */ |
| + nla_total_size(1) /* IFLA_OPERSTATE */ |
| + nla_total_size(1) /* IFLA_LINKMODE */ |
| + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ |
| + nla_total_size(4) /* IFLA_LINK_NETNSID */ |
| + nla_total_size(4) /* IFLA_GROUP */ |
| + nla_total_size(ext_filter_mask |
| & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ |
| + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ |
| + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ |
| + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ |
| + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ |
| + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ |
| + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ |
| + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ |
| + rtnl_xdp_size() /* IFLA_XDP */ |
| + nla_total_size(4) /* IFLA_EVENT */ |
| + nla_total_size(4) /* IFLA_NEW_NETNSID */ |
| + nla_total_size(4) /* IFLA_NEW_IFINDEX */ |
| + rtnl_proto_down_size(dev) /* proto down */ |
| + nla_total_size(4) /* IFLA_TARGET_NETNSID */ |
| + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */ |
| + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */ |
| + nla_total_size(4) /* IFLA_MIN_MTU */ |
| + nla_total_size(4) /* IFLA_MAX_MTU */ |
| + rtnl_prop_list_size(dev) |
| + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */ |
| + rtnl_devlink_port_size(dev) |
| + rtnl_dpll_pin_size(dev) |
| + nla_total_size(8) /* IFLA_MAX_PACING_OFFLOAD_HORIZON */ |
| + 0; |
| } |
| |
| 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_noflag(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_noflag(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_noflag(skb, IFLA_PORT_SELF); |
| if (!port_self) |
| return -EMSGSIZE; |
| |
| err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); |
| if (err) { |
| nla_nest_cancel(skb, port_self); |
| return (err == -EMSGSIZE) ? err : 0; |
| } |
| |
| nla_nest_end(skb, port_self); |
| |
| return 0; |
| } |
| |
| static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, |
| u32 ext_filter_mask) |
| { |
| int err; |
| |
| if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || |
| !(ext_filter_mask & RTEXT_FILTER_VF)) |
| return 0; |
| |
| err = rtnl_port_self_fill(skb, dev); |
| if (err) |
| return err; |
| |
| if (dev_num_vf(dev->dev.parent)) { |
| err = rtnl_vf_ports_fill(skb, dev); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) |
| { |
| int err; |
| struct netdev_phys_item_id ppid; |
| |
| err = dev_get_phys_port_id(dev, &ppid); |
| if (err) { |
| if (err == -EOPNOTSUPP) |
| return 0; |
| return err; |
| } |
| |
| if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) |
| return -EMSGSIZE; |
| |
| return 0; |
| } |
| |
| static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) |
| { |
| char name[IFNAMSIZ]; |
| int err; |
| |
| err = dev_get_phys_port_name(dev, name, sizeof(name)); |
| if (err) { |
| if (err == -EOPNOTSUPP) |
| return 0; |
| return err; |
| } |
| |
| if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name)) |
| return -EMSGSIZE; |
| |
| return 0; |
| } |
| |
| static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct netdev_phys_item_id ppid = { }; |
| int err; |
| |
| err = dev_get_port_parent_id(dev, &ppid, false); |
| if (err) { |
| if (err == -EOPNOTSUPP) |
| return 0; |
| return err; |
| } |
| |
| if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, 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, |
| u32 ext_filter_mask) |
| { |
| struct ifla_vf_rss_query_en vf_rss_query_en; |
| struct nlattr *vf, *vfstats, *vfvlanlist; |
| struct ifla_vf_link_state vf_linkstate; |
| struct ifla_vf_vlan_info vf_vlan_info; |
| 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 ifla_vf_mac vf_mac; |
| struct ifla_vf_broadcast vf_broadcast; |
| struct ifla_vf_info ivi; |
| struct ifla_vf_guid node_guid; |
| struct ifla_vf_guid port_guid; |
| |
| memset(&ivi, 0, sizeof(ivi)); |
| |
| /* Not all SR-IOV capable drivers support the |
| * spoofcheck and "RSS query enable" query. Preset to |
| * -1 so the user space tool can detect that the driver |
| * didn't report anything. |
| */ |
| ivi.spoofchk = -1; |
| ivi.rss_query_en = -1; |
| ivi.trusted = -1; |
| /* The default value for VF link state is "auto" |
| * IFLA_VF_LINK_STATE_AUTO which equals zero |
| */ |
| ivi.linkstate = 0; |
| /* VLAN Protocol by default is 802.1Q */ |
| ivi.vlan_proto = htons(ETH_P_8021Q); |
| if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) |
| return 0; |
| |
| memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); |
| memset(&node_guid, 0, sizeof(node_guid)); |
| memset(&port_guid, 0, sizeof(port_guid)); |
| |
| vf_mac.vf = |
| vf_vlan.vf = |
| vf_vlan_info.vf = |
| vf_rate.vf = |
| vf_tx_rate.vf = |
| vf_spoofchk.vf = |
| vf_linkstate.vf = |
| vf_rss_query_en.vf = |
| vf_trust.vf = |
| node_guid.vf = |
| port_guid.vf = ivi.vf; |
| |
| memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); |
| memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len); |
| vf_vlan.vlan = ivi.vlan; |
| vf_vlan.qos = ivi.qos; |
| vf_vlan_info.vlan = ivi.vlan; |
| vf_vlan_info.qos = ivi.qos; |
| vf_vlan_info.vlan_proto = ivi.vlan_proto; |
| 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_noflag(skb, IFLA_VF_INFO); |
| if (!vf) |
| return -EMSGSIZE; |
| if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || |
| nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) || |
| 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)) |
| goto nla_put_vf_failure; |
| |
| if (dev->netdev_ops->ndo_get_vf_guid && |
| !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid, |
| &port_guid)) { |
| if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid), |
| &node_guid) || |
| nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid), |
| &port_guid)) |
| goto nla_put_vf_failure; |
| } |
| vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST); |
| if (!vfvlanlist) |
| goto nla_put_vf_failure; |
| if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), |
| &vf_vlan_info)) { |
| nla_nest_cancel(skb, vfvlanlist); |
| goto nla_put_vf_failure; |
| } |
| nla_nest_end(skb, vfvlanlist); |
| if (~ext_filter_mask & RTEXT_FILTER_SKIP_STATS) { |
| 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_noflag(skb, IFLA_VF_STATS); |
| if (!vfstats) |
| goto nla_put_vf_failure; |
| 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) || |
| nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED, |
| vf_stats.rx_dropped, IFLA_VF_STATS_PAD) || |
| nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED, |
| vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) { |
| nla_nest_cancel(skb, vfstats); |
| goto nla_put_vf_failure; |
| } |
| nla_nest_end(skb, vfstats); |
| } |
| nla_nest_end(skb, vf); |
| return 0; |
| |
| nla_put_vf_failure: |
| nla_nest_cancel(skb, vf); |
| return -EMSGSIZE; |
| } |
| |
| static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb, |
| struct net_device *dev, |
| u32 ext_filter_mask) |
| { |
| struct nlattr *vfinfo; |
| int i, num_vfs; |
| |
| if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0)) |
| return 0; |
| |
| num_vfs = dev_num_vf(dev->dev.parent); |
| if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs)) |
| return -EMSGSIZE; |
| |
| if (!dev->netdev_ops->ndo_get_vf_config) |
| return 0; |
| |
| vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST); |
| if (!vfinfo) |
| return -EMSGSIZE; |
| |
| for (i = 0; i < num_vfs; i++) { |
| if (rtnl_fill_vfinfo(skb, dev, i, ext_filter_mask)) { |
| nla_nest_cancel(skb, vfinfo); |
| return -EMSGSIZE; |
| } |
| } |
| |
| nla_nest_end(skb, vfinfo); |
| return 0; |
| } |
| |
| static int rtnl_fill_link_ifmap(struct sk_buff *skb, |
| const struct net_device *dev) |
| { |
| struct rtnl_link_ifmap map; |
| |
| memset(&map, 0, sizeof(map)); |
| map.mem_start = READ_ONCE(dev->mem_start); |
| map.mem_end = READ_ONCE(dev->mem_end); |
| map.base_addr = READ_ONCE(dev->base_addr); |
| map.irq = READ_ONCE(dev->irq); |
| map.dma = READ_ONCE(dev->dma); |
| map.port = READ_ONCE(dev->if_port); |
| |
| if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) |
| return -EMSGSIZE; |
| |
| return 0; |
| } |
| |
| static u32 rtnl_xdp_prog_skb(struct net_device *dev) |
| { |
| const struct bpf_prog *generic_xdp_prog; |
| u32 res = 0; |
| |
| rcu_read_lock(); |
| generic_xdp_prog = rcu_dereference(dev->xdp_prog); |
| if (generic_xdp_prog) |
| res = generic_xdp_prog->aux->id; |
| rcu_read_unlock(); |
| |
| return res; |
| } |
| |
| static u32 rtnl_xdp_prog_drv(struct net_device *dev) |
| { |
| return dev_xdp_prog_id(dev, XDP_MODE_DRV); |
| } |
| |
| static u32 rtnl_xdp_prog_hw(struct net_device *dev) |
| { |
| return dev_xdp_prog_id(dev, XDP_MODE_HW); |
| } |
| |
| static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev, |
| u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr, |
| u32 (*get_prog_id)(struct net_device *dev)) |
| { |
| u32 curr_id; |
| int err; |
| |
| curr_id = get_prog_id(dev); |
| if (!curr_id) |
| return 0; |
| |
| *prog_id = curr_id; |
| err = nla_put_u32(skb, attr, curr_id); |
| if (err) |
| return err; |
| |
| if (*mode != XDP_ATTACHED_NONE) |
| *mode = XDP_ATTACHED_MULTI; |
| else |
| *mode = tgt_mode; |
| |
| return 0; |
| } |
| |
| static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct nlattr *xdp; |
| u32 prog_id; |
| int err; |
| u8 mode; |
| |
| xdp = nla_nest_start_noflag(skb, IFLA_XDP); |
| if (!xdp) |
| return -EMSGSIZE; |
| |
| prog_id = 0; |
| mode = XDP_ATTACHED_NONE; |
| err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB, |
| IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb); |
| if (err) |
| goto err_cancel; |
| err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV, |
| IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv); |
| if (err) |
| goto err_cancel; |
| err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW, |
| IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw); |
| if (err) |
| goto err_cancel; |
| |
| err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode); |
| if (err) |
| goto err_cancel; |
| |
| if (prog_id && mode != XDP_ATTACHED_MULTI) { |
| err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id); |
| if (err) |
| goto err_cancel; |
| } |
| |
| nla_nest_end(skb, xdp); |
| return 0; |
| |
| err_cancel: |
| nla_nest_cancel(skb, xdp); |
| return err; |
| } |
| |
| static u32 rtnl_get_event(unsigned long event) |
| { |
| u32 rtnl_event_type = IFLA_EVENT_NONE; |
| |
| switch (event) { |
| case NETDEV_REBOOT: |
| rtnl_event_type = IFLA_EVENT_REBOOT; |
| break; |
| case NETDEV_FEAT_CHANGE: |
| rtnl_event_type = IFLA_EVENT_FEATURES; |
| break; |
| case NETDEV_BONDING_FAILOVER: |
| rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER; |
| break; |
| case NETDEV_NOTIFY_PEERS: |
| rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS; |
| break; |
| case NETDEV_RESEND_IGMP: |
| rtnl_event_type = IFLA_EVENT_IGMP_RESEND; |
| break; |
| case NETDEV_CHANGEINFODATA: |
| rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS; |
| break; |
| default: |
| break; |
| } |
| |
| return rtnl_event_type; |
| } |
| |
| static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev) |
| { |
| const struct net_device *upper_dev; |
| int ret = 0; |
| |
| rcu_read_lock(); |
| |
| upper_dev = netdev_master_upper_dev_get_rcu(dev); |
| if (upper_dev) |
| ret = nla_put_u32(skb, IFLA_MASTER, |
| READ_ONCE(upper_dev->ifindex)); |
| |
| rcu_read_unlock(); |
| return ret; |
| } |
| |
| static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev, |
| bool force) |
| { |
| int iflink = dev_get_iflink(dev); |
| |
| if (force || READ_ONCE(dev->ifindex) != iflink) |
| return nla_put_u32(skb, IFLA_LINK, iflink); |
| |
| return 0; |
| } |
| |
| static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| char buf[IFALIASZ]; |
| int ret; |
| |
| ret = dev_get_alias(dev, buf, sizeof(buf)); |
| return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0; |
| } |
| |
| static int rtnl_fill_link_netnsid(struct sk_buff *skb, |
| const struct net_device *dev, |
| struct net *src_net, gfp_t gfp) |
| { |
| bool put_iflink = false; |
| |
| 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(src_net, link_net, gfp); |
| |
| if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) |
| return -EMSGSIZE; |
| |
| put_iflink = true; |
| } |
| } |
| |
| return nla_put_iflink(skb, dev, put_iflink); |
| } |
| |
| static int rtnl_fill_link_af(struct sk_buff *skb, |
| const struct net_device *dev, |
| u32 ext_filter_mask) |
| { |
| const struct rtnl_af_ops *af_ops; |
| struct nlattr *af_spec; |
| |
| af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC); |
| if (!af_spec) |
| return -EMSGSIZE; |
| |
| list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { |
| struct nlattr *af; |
| int err; |
| |
| if (!af_ops->fill_link_af) |
| continue; |
| |
| af = nla_nest_start_noflag(skb, af_ops->family); |
| if (!af) |
| return -EMSGSIZE; |
| |
| 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) |
| return -EMSGSIZE; |
| |
| nla_nest_end(skb, af); |
| } |
| |
| nla_nest_end(skb, af_spec); |
| return 0; |
| } |
| |
| static int rtnl_fill_alt_ifnames(struct sk_buff *skb, |
| const struct net_device *dev) |
| { |
| struct netdev_name_node *name_node; |
| int count = 0; |
| |
| list_for_each_entry_rcu(name_node, &dev->name_node->list, list) { |
| if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name)) |
| return -EMSGSIZE; |
| count++; |
| } |
| return count; |
| } |
| |
| /* RCU protected. */ |
| static int rtnl_fill_prop_list(struct sk_buff *skb, |
| const struct net_device *dev) |
| { |
| struct nlattr *prop_list; |
| int ret; |
| |
| prop_list = nla_nest_start(skb, IFLA_PROP_LIST); |
| if (!prop_list) |
| return -EMSGSIZE; |
| |
| ret = rtnl_fill_alt_ifnames(skb, dev); |
| if (ret <= 0) |
| goto nest_cancel; |
| |
| nla_nest_end(skb, prop_list); |
| return 0; |
| |
| nest_cancel: |
| nla_nest_cancel(skb, prop_list); |
| return ret; |
| } |
| |
| static int rtnl_fill_proto_down(struct sk_buff *skb, |
| const struct net_device *dev) |
| { |
| struct nlattr *pr; |
| u32 preason; |
| |
| if (nla_put_u8(skb, IFLA_PROTO_DOWN, READ_ONCE(dev->proto_down))) |
| goto nla_put_failure; |
| |
| preason = READ_ONCE(dev->proto_down_reason); |
| if (!preason) |
| return 0; |
| |
| pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON); |
| if (!pr) |
| return -EMSGSIZE; |
| |
| if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) { |
| nla_nest_cancel(skb, pr); |
| goto nla_put_failure; |
| } |
| |
| nla_nest_end(skb, pr); |
| return 0; |
| |
| nla_put_failure: |
| return -EMSGSIZE; |
| } |
| |
| static int rtnl_fill_devlink_port(struct sk_buff *skb, |
| const struct net_device *dev) |
| { |
| struct nlattr *devlink_port_nest; |
| int ret; |
| |
| devlink_port_nest = nla_nest_start(skb, IFLA_DEVLINK_PORT); |
| if (!devlink_port_nest) |
| return -EMSGSIZE; |
| |
| if (dev->devlink_port) { |
| ret = devlink_nl_port_handle_fill(skb, dev->devlink_port); |
| if (ret < 0) |
| goto nest_cancel; |
| } |
| |
| nla_nest_end(skb, devlink_port_nest); |
| return 0; |
| |
| nest_cancel: |
| nla_nest_cancel(skb, devlink_port_nest); |
| return ret; |
| } |
| |
| static int rtnl_fill_dpll_pin(struct sk_buff *skb, |
| const struct net_device *dev) |
| { |
| struct nlattr *dpll_pin_nest; |
| int ret; |
| |
| dpll_pin_nest = nla_nest_start(skb, IFLA_DPLL_PIN); |
| if (!dpll_pin_nest) |
| return -EMSGSIZE; |
| |
| ret = dpll_netdev_add_pin_handle(skb, dev); |
| if (ret < 0) |
| goto nest_cancel; |
| |
| nla_nest_end(skb, dpll_pin_nest); |
| return 0; |
| |
| nest_cancel: |
| nla_nest_cancel(skb, dpll_pin_nest); |
| return ret; |
| } |
| |
| static int rtnl_fill_ifinfo(struct sk_buff *skb, |
| struct net_device *dev, struct net *src_net, |
| int type, u32 pid, u32 seq, u32 change, |
| unsigned int flags, u32 ext_filter_mask, |
| u32 event, int *new_nsid, int new_ifindex, |
| int tgt_netnsid, gfp_t gfp) |
| { |
| char devname[IFNAMSIZ]; |
| struct ifinfomsg *ifm; |
| struct nlmsghdr *nlh; |
| struct Qdisc *qdisc; |
| |
| 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 = READ_ONCE(dev->type); |
| ifm->ifi_index = READ_ONCE(dev->ifindex); |
| ifm->ifi_flags = dev_get_flags(dev); |
| ifm->ifi_change = change; |
| |
| if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid)) |
| goto nla_put_failure; |
| |
| netdev_copy_name(dev, devname); |
| if (nla_put_string(skb, IFLA_IFNAME, devname)) |
| goto nla_put_failure; |
| |
| if (nla_put_u32(skb, IFLA_TXQLEN, READ_ONCE(dev->tx_queue_len)) || |
| nla_put_u8(skb, IFLA_OPERSTATE, |
| netif_running(dev) ? READ_ONCE(dev->operstate) : |
| IF_OPER_DOWN) || |
| nla_put_u8(skb, IFLA_LINKMODE, READ_ONCE(dev->link_mode)) || |
| nla_put_u32(skb, IFLA_MTU, READ_ONCE(dev->mtu)) || |
| nla_put_u32(skb, IFLA_MIN_MTU, READ_ONCE(dev->min_mtu)) || |
| nla_put_u32(skb, IFLA_MAX_MTU, READ_ONCE(dev->max_mtu)) || |
| nla_put_u32(skb, IFLA_GROUP, READ_ONCE(dev->group)) || |
| nla_put_u32(skb, IFLA_PROMISCUITY, READ_ONCE(dev->promiscuity)) || |
| nla_put_u32(skb, IFLA_ALLMULTI, READ_ONCE(dev->allmulti)) || |
| nla_put_u32(skb, IFLA_NUM_TX_QUEUES, |
| READ_ONCE(dev->num_tx_queues)) || |
| nla_put_u32(skb, IFLA_GSO_MAX_SEGS, |
| READ_ONCE(dev->gso_max_segs)) || |
| nla_put_u32(skb, IFLA_GSO_MAX_SIZE, |
| READ_ONCE(dev->gso_max_size)) || |
| nla_put_u32(skb, IFLA_GRO_MAX_SIZE, |
| READ_ONCE(dev->gro_max_size)) || |
| nla_put_u32(skb, IFLA_GSO_IPV4_MAX_SIZE, |
| READ_ONCE(dev->gso_ipv4_max_size)) || |
| nla_put_u32(skb, IFLA_GRO_IPV4_MAX_SIZE, |
| READ_ONCE(dev->gro_ipv4_max_size)) || |
| nla_put_u32(skb, IFLA_TSO_MAX_SIZE, |
| READ_ONCE(dev->tso_max_size)) || |
| nla_put_u32(skb, IFLA_TSO_MAX_SEGS, |
| READ_ONCE(dev->tso_max_segs)) || |
| nla_put_uint(skb, IFLA_MAX_PACING_OFFLOAD_HORIZON, |
| READ_ONCE(dev->max_pacing_offload_horizon)) || |
| #ifdef CONFIG_RPS |
| nla_put_u32(skb, IFLA_NUM_RX_QUEUES, |
| READ_ONCE(dev->num_rx_queues)) || |
| #endif |
| put_master_ifindex(skb, dev) || |
| nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || |
| nla_put_ifalias(skb, dev) || |
| nla_put_u32(skb, IFLA_CARRIER_CHANGES, |
| atomic_read(&dev->carrier_up_count) + |
| atomic_read(&dev->carrier_down_count)) || |
| nla_put_u32(skb, IFLA_CARRIER_UP_COUNT, |
| atomic_read(&dev->carrier_up_count)) || |
| nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT, |
| atomic_read(&dev->carrier_down_count))) |
| goto nla_put_failure; |
| |
| if (rtnl_fill_proto_down(skb, dev)) |
| goto nla_put_failure; |
| |
| if (event != IFLA_EVENT_NONE) { |
| if (nla_put_u32(skb, IFLA_EVENT, event)) |
| 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 (rtnl_fill_vf(skb, dev, ext_filter_mask)) |
| goto nla_put_failure; |
| |
| if (rtnl_port_fill(skb, dev, ext_filter_mask)) |
| goto nla_put_failure; |
| |
| if (rtnl_xdp_fill(skb, dev)) |
| 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 (new_nsid && |
| nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0) |
| goto nla_put_failure; |
| if (new_ifindex && |
| nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0) |
| goto nla_put_failure; |
| |
| if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) && |
| nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr)) |
| goto nla_put_failure; |
| |
| rcu_read_lock(); |
| if (rtnl_fill_link_netnsid(skb, dev, src_net, GFP_ATOMIC)) |
| goto nla_put_failure_rcu; |
| qdisc = rcu_dereference(dev->qdisc); |
| if (qdisc && nla_put_string(skb, IFLA_QDISC, qdisc->ops->id)) |
| goto nla_put_failure_rcu; |
| if (rtnl_fill_link_af(skb, dev, ext_filter_mask)) |
| goto nla_put_failure_rcu; |
| if (rtnl_fill_link_ifmap(skb, dev)) |
| goto nla_put_failure_rcu; |
| if (rtnl_fill_prop_list(skb, dev)) |
| goto nla_put_failure_rcu; |
| rcu_read_unlock(); |
| |
| if (dev->dev.parent && |
| nla_put_string(skb, IFLA_PARENT_DEV_NAME, |
| dev_name(dev->dev.parent))) |
| goto nla_put_failure; |
| |
| if (dev->dev.parent && dev->dev.parent->bus && |
| nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME, |
| dev->dev.parent->bus->name)) |
| goto nla_put_failure; |
| |
| if (rtnl_fill_devlink_port(skb, dev)) |
| goto nla_put_failure; |
| |
| if (rtnl_fill_dpll_pin(skb, dev)) |
| goto nla_put_failure; |
| |
| nlmsg_end(skb, nlh); |
| return 0; |
| |
| nla_put_failure_rcu: |
| rcu_read_unlock(); |
| nla_put_failure: |
| nlmsg_cancel(skb, nlh); |
| return -EMSGSIZE; |
| } |
| |
| static const struct nla_policy ifla_policy[IFLA_MAX+1] = { |
| [IFLA_UNSPEC] = { .strict_start_type = IFLA_DPLL_PIN }, |
| [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 is a string, but policy is set to NLA_BINARY to |
| * allow 0-length string (needed to remove an alias). |
| */ |
| [IFLA_IFALIAS] = { .type = NLA_BINARY, .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_GSO_MAX_SEGS] = { .type = NLA_U32 }, |
| [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 }, |
| [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, |
| [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ |
| [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, |
| [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, |
| [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, |
| [IFLA_XDP] = { .type = NLA_NESTED }, |
| [IFLA_EVENT] = { .type = NLA_U32 }, |
| [IFLA_GROUP] = { .type = NLA_U32 }, |
| [IFLA_TARGET_NETNSID] = { .type = NLA_S32 }, |
| [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 }, |
| [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 }, |
| [IFLA_MIN_MTU] = { .type = NLA_U32 }, |
| [IFLA_MAX_MTU] = { .type = NLA_U32 }, |
| [IFLA_PROP_LIST] = { .type = NLA_NESTED }, |
| [IFLA_ALT_IFNAME] = { .type = NLA_STRING, |
| .len = ALTIFNAMSIZ - 1 }, |
| [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT }, |
| [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED }, |
| [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1), |
| [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING }, |
| [IFLA_GRO_MAX_SIZE] = { .type = NLA_U32 }, |
| [IFLA_TSO_MAX_SIZE] = { .type = NLA_REJECT }, |
| [IFLA_TSO_MAX_SEGS] = { .type = NLA_REJECT }, |
| [IFLA_ALLMULTI] = { .type = NLA_REJECT }, |
| [IFLA_GSO_IPV4_MAX_SIZE] = { .type = NLA_U32 }, |
| [IFLA_GRO_IPV4_MAX_SIZE] = { .type = NLA_U32 }, |
| }; |
| |
| static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { |
| [IFLA_INFO_KIND] = { .type = NLA_STRING }, |
| [IFLA_INFO_DATA] = { .type = NLA_NESTED }, |
| [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, |
| [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, |
| }; |
| |
| static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { |
| [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, |
| [IFLA_VF_BROADCAST] = { .type = NLA_REJECT }, |
| [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, |
| [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, |
| [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_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, }, |
| |
| /* Unused, but we need to keep it here since user space could |
| * fill it. It's also broken with regard to NLA_BINARY use in |
| * combination with structs. |
| */ |
| [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, |
| .len = sizeof(struct ifla_port_vsi) }, |
| }; |
| |
| static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { |
| [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD }, |
| [IFLA_XDP_FD] = { .type = NLA_S32 }, |
| [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 }, |
| [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, |
| [IFLA_XDP_FLAGS] = { .type = NLA_U32 }, |
| [IFLA_XDP_PROG_ID] = { .type = NLA_U32 }, |
| }; |
| |
| 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_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0) |
| return NULL; |
| |
| if (linfo[IFLA_INFO_KIND]) { |
| char kind[MODULE_NAME_LEN]; |
| |
| nla_strscpy(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); |
| |
| /* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need |
| * another invalid value for ifindex to denote "no master". |
| */ |
| if (master_idx == -1) |
| return !!master; |
| |
| 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; |
| } |
| |
| /** |
| * rtnl_get_net_ns_capable - Get netns if sufficiently privileged. |
| * @sk: netlink socket |
| * @netnsid: network namespace identifier |
| * |
| * Returns the network namespace identified by netnsid on success or an error |
| * pointer on failure. |
| */ |
| struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid) |
| { |
| struct net *net; |
| |
| net = get_net_ns_by_id(sock_net(sk), netnsid); |
| if (!net) |
| return ERR_PTR(-EINVAL); |
| |
| /* For now, the caller is required to have CAP_NET_ADMIN in |
| * the user namespace owning the target net ns. |
| */ |
| if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) { |
| put_net(net); |
| return ERR_PTR(-EACCES); |
| } |
| return net; |
| } |
| EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable); |
| |
| static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh, |
| bool strict_check, struct nlattr **tb, |
| struct netlink_ext_ack *extack) |
| { |
| int hdrlen; |
| |
| if (strict_check) { |
| struct ifinfomsg *ifm; |
| |
| if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { |
| NL_SET_ERR_MSG(extack, "Invalid header for link dump"); |
| return -EINVAL; |
| } |
| |
| ifm = nlmsg_data(nlh); |
| if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || |
| ifm->ifi_change) { |
| NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request"); |
| return -EINVAL; |
| } |
| if (ifm->ifi_index) { |
| NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps"); |
| return -EINVAL; |
| } |
| |
| return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, |
| IFLA_MAX, ifla_policy, |
| extack); |
| } |
| |
| /* 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(nlh) < sizeof(struct ifinfomsg) ? |
| sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); |
| |
| return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, |
| extack); |
| } |
| |
| static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
| { |
| const struct rtnl_link_ops *kind_ops = NULL; |
| struct netlink_ext_ack *extack = cb->extack; |
| const struct nlmsghdr *nlh = cb->nlh; |
| struct net *net = sock_net(skb->sk); |
| unsigned int flags = NLM_F_MULTI; |
| struct nlattr *tb[IFLA_MAX+1]; |
| struct { |
| unsigned long ifindex; |
| } *ctx = (void *)cb->ctx; |
| struct net *tgt_net = net; |
| u32 ext_filter_mask = 0; |
| struct net_device *dev; |
| int master_idx = 0; |
| int netnsid = -1; |
| int err, i; |
| |
| err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack); |
| if (err < 0) { |
| if (cb->strict_check) |
| return err; |
| |
| goto walk_entries; |
| } |
| |
| for (i = 0; i <= IFLA_MAX; ++i) { |
| if (!tb[i]) |
| continue; |
| |
| /* new attributes should only be added with strict checking */ |
| switch (i) { |
| case IFLA_TARGET_NETNSID: |
| netnsid = nla_get_s32(tb[i]); |
| tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid); |
| if (IS_ERR(tgt_net)) { |
| NL_SET_ERR_MSG(extack, "Invalid target network namespace id"); |
| return PTR_ERR(tgt_net); |
| } |
| break; |
| case IFLA_EXT_MASK: |
| ext_filter_mask = nla_get_u32(tb[i]); |
| break; |
| case IFLA_MASTER: |
| master_idx = nla_get_u32(tb[i]); |
| break; |
| case IFLA_LINKINFO: |
| kind_ops = linkinfo_to_kind_ops(tb[i]); |
| break; |
| default: |
| if (cb->strict_check) { |
| NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request"); |
| return -EINVAL; |
| } |
| } |
| } |
| |
| if (master_idx || kind_ops) |
| flags |= NLM_F_DUMP_FILTERED; |
| |
| walk_entries: |
| err = 0; |
| for_each_netdev_dump(tgt_net, dev, ctx->ifindex) { |
| if (link_dump_filtered(dev, master_idx, kind_ops)) |
| continue; |
| err = rtnl_fill_ifinfo(skb, dev, net, RTM_NEWLINK, |
| NETLINK_CB(cb->skb).portid, |
| nlh->nlmsg_seq, 0, flags, |
| ext_filter_mask, 0, NULL, 0, |
| netnsid, GFP_KERNEL); |
| if (err < 0) |
| break; |
| } |
| cb->seq = tgt_net->dev_base_seq; |
| nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
| if (netnsid >= 0) |
| put_net(tgt_net); |
| |
| return err; |
| } |
| |
| int rtnl_nla_parse_ifinfomsg(struct nlattr **tb, const struct nlattr *nla_peer, |
| struct netlink_ext_ack *exterr) |
| { |
| const struct ifinfomsg *ifmp; |
| const struct nlattr *attrs; |
| size_t len; |
| |
| ifmp = nla_data(nla_peer); |
| attrs = nla_data(nla_peer) + sizeof(struct ifinfomsg); |
| len = nla_len(nla_peer) - sizeof(struct ifinfomsg); |
| |
| if (ifmp->ifi_index < 0) { |
| NL_SET_ERR_MSG_ATTR(exterr, nla_peer, |
| "ifindex can't be negative"); |
| return -EINVAL; |
| } |
| |
| return nla_parse_deprecated(tb, IFLA_MAX, attrs, len, ifla_policy, |
| exterr); |
| } |
| EXPORT_SYMBOL(rtnl_nla_parse_ifinfomsg); |
| |
| 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); |
| |
| /* Figure out which network namespace we are talking about by |
| * examining the link attributes in the following order: |
| * |
| * 1. IFLA_NET_NS_PID |
| * 2. IFLA_NET_NS_FD |
| * 3. IFLA_TARGET_NETNSID |
| */ |
| static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net, |
| struct nlattr *tb[]) |
| { |
| struct net *net; |
| |
| if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) |
| return rtnl_link_get_net(src_net, tb); |
| |
| if (!tb[IFLA_TARGET_NETNSID]) |
| return get_net(src_net); |
| |
| net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID])); |
| if (!net) |
| return ERR_PTR(-EINVAL); |
| |
| return net; |
| } |
| |
| static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb, |
| struct net *src_net, |
| struct nlattr *tb[], int cap) |
| { |
| struct net *net; |
| |
| net = rtnl_link_get_net_by_nlattr(src_net, tb); |
| if (IS_ERR(net)) |
| return net; |
| |
| if (!netlink_ns_capable(skb, net->user_ns, cap)) { |
| put_net(net); |
| return ERR_PTR(-EPERM); |
| } |
| |
| return net; |
| } |
| |
| /* Verify that rtnetlink requests do not pass additional properties |
| * potentially referring to different network namespaces. |
| */ |
| static int rtnl_ensure_unique_netns(struct nlattr *tb[], |
| struct netlink_ext_ack *extack, |
| bool netns_id_only) |
| { |
| |
| if (netns_id_only) { |
| if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD]) |
| return 0; |
| |
| NL_SET_ERR_MSG(extack, "specified netns attribute not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])) |
| goto invalid_attr; |
| |
| if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD])) |
| goto invalid_attr; |
| |
| if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID])) |
| goto invalid_attr; |
| |
| return 0; |
| |
| invalid_attr: |
| NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified"); |
| return -EINVAL; |
| } |
| |
| static int rtnl_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate, |
| int max_tx_rate) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| |
| if (!ops->ndo_set_vf_rate) |
| return -EOPNOTSUPP; |
| if (max_tx_rate && max_tx_rate < min_tx_rate) |
| return -EINVAL; |
| |
| return ops->ndo_set_vf_rate(dev, vf, min_tx_rate, max_tx_rate); |
| } |
| |
| static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[], |
| struct netlink_ext_ack *extack) |
| { |
| 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_GSO_MAX_SIZE] && |
| nla_get_u32(tb[IFLA_GSO_MAX_SIZE]) > dev->tso_max_size) { |
| NL_SET_ERR_MSG(extack, "too big gso_max_size"); |
| return -EINVAL; |
| } |
| |
| if (tb[IFLA_GSO_MAX_SEGS] && |
| (nla_get_u32(tb[IFLA_GSO_MAX_SEGS]) > GSO_MAX_SEGS || |
| nla_get_u32(tb[IFLA_GSO_MAX_SEGS]) > dev->tso_max_segs)) { |
| NL_SET_ERR_MSG(extack, "too big gso_max_segs"); |
| return -EINVAL; |
| } |
| |
| if (tb[IFLA_GRO_MAX_SIZE] && |
| nla_get_u32(tb[IFLA_GRO_MAX_SIZE]) > GRO_MAX_SIZE) { |
| NL_SET_ERR_MSG(extack, "too big gro_max_size"); |
| return -EINVAL; |
| } |
| |
| if (tb[IFLA_GSO_IPV4_MAX_SIZE] && |
| nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]) > dev->tso_max_size) { |
| NL_SET_ERR_MSG(extack, "too big gso_ipv4_max_size"); |
| return -EINVAL; |
| } |
| |
| if (tb[IFLA_GRO_IPV4_MAX_SIZE] && |
| nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]) > GRO_MAX_SIZE) { |
| NL_SET_ERR_MSG(extack, "too big gro_ipv4_max_size"); |
| 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; |
| |
| af_ops = rtnl_af_lookup(nla_type(af)); |
| if (!af_ops) |
| return -EAFNOSUPPORT; |
| |
| if (!af_ops->set_link_af) |
| return -EOPNOTSUPP; |
| |
| if (af_ops->validate_link_af) { |
| err = af_ops->validate_link_af(dev, af, extack); |
| 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]); |
| |
| if (ivm->vf >= INT_MAX) |
| return -EINVAL; |
| 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]); |
| |
| if (ivv->vf >= INT_MAX) |
| return -EINVAL; |
| err = -EOPNOTSUPP; |
| if (ops->ndo_set_vf_vlan) |
| err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, |
| ivv->qos, |
| htons(ETH_P_8021Q)); |
| if (err < 0) |
| return err; |
| } |
| |
| if (tb[IFLA_VF_VLAN_LIST]) { |
| struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; |
| struct nlattr *attr; |
| int rem, len = 0; |
| |
| err = -EOPNOTSUPP; |
| if (!ops->ndo_set_vf_vlan) |
| return err; |
| |
| nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { |
| if (nla_type(attr) != IFLA_VF_VLAN_INFO || |
| nla_len(attr) < sizeof(struct ifla_vf_vlan_info)) { |
| return -EINVAL; |
| } |
| if (len >= MAX_VLAN_LIST_LEN) |
| return -EOPNOTSUPP; |
| ivvl[len] = nla_data(attr); |
| |
| len++; |
| } |
| if (len == 0) |
| return -EINVAL; |
| |
| if (ivvl[0]->vf >= INT_MAX) |
| return -EINVAL; |
| err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, |
| ivvl[0]->qos, ivvl[0]->vlan_proto); |
| 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; |
| |
| if (ivt->vf >= INT_MAX) |
| return -EINVAL; |
| err = -EOPNOTSUPP; |
| if (ops->ndo_get_vf_config) |
| err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); |
| if (err < 0) |
| return err; |
| |
| err = rtnl_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]); |
| |
| if (ivt->vf >= INT_MAX) |
| return -EINVAL; |
| |
| err = rtnl_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]); |
| |
| if (ivs->vf >= INT_MAX) |
| return -EINVAL; |
| 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]); |
| |
| if (ivl->vf >= INT_MAX) |
| return -EINVAL; |
| 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 (ivrssq_en->vf >= INT_MAX) |
| return -EINVAL; |
| 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]); |
| |
| if (ivt->vf >= INT_MAX) |
| return -EINVAL; |
| 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 (ivt->vf >= INT_MAX) |
| return -EINVAL; |
| 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 (ivt->vf >= INT_MAX) |
| return -EINVAL; |
| 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 netlink_ext_ack *extack) |
| { |
| 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, extack); |
| if (err) |
| return err; |
| } else { |
| return -EOPNOTSUPP; |
| } |
| } |
| return 0; |
| } |
| |
| static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = { |
| [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 }, |
| [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 }, |
| }; |
| |
| static int do_set_proto_down(struct net_device *dev, |
| struct nlattr *nl_proto_down, |
| struct nlattr *nl_proto_down_reason, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1]; |
| unsigned long mask = 0; |
| u32 value; |
| bool proto_down; |
| int err; |
| |
| if (!dev->change_proto_down) { |
| NL_SET_ERR_MSG(extack, "Protodown not supported by device"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (nl_proto_down_reason) { |
| err = nla_parse_nested_deprecated(pdreason, |
| IFLA_PROTO_DOWN_REASON_MAX, |
| nl_proto_down_reason, |
| ifla_proto_down_reason_policy, |
| NULL); |
| if (err < 0) |
| return err; |
| |
| if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) { |
| NL_SET_ERR_MSG(extack, "Invalid protodown reason value"); |
| return -EINVAL; |
| } |
| |
| value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]); |
| |
| if (pdreason[IFLA_PROTO_DOWN_REASON_MASK]) |
| mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]); |
| |
| dev_change_proto_down_reason(dev, mask, value); |
| } |
| |
| if (nl_proto_down) { |
| proto_down = nla_get_u8(nl_proto_down); |
| |
| /* Don't turn off protodown if there are active reasons */ |
| if (!proto_down && dev->proto_down_reason) { |
| NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons"); |
| return -EBUSY; |
| } |
| err = dev_change_proto_down(dev, |
| proto_down); |
| if (err) |
| return err; |
| } |
| |
| 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 netlink_ext_ack *extack, |
| struct nlattr **tb, int status) |
| { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| char ifname[IFNAMSIZ]; |
| int err; |
| |
| if (tb[IFLA_IFNAME]) |
| nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); |
| else |
| ifname[0] = '\0'; |
| |
| if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) { |
| const char *pat = ifname[0] ? ifname : NULL; |
| struct net *net; |
| int new_ifindex; |
| |
| net = rtnl_link_get_net_capable(skb, dev_net(dev), |
| tb, CAP_NET_ADMIN); |
| if (IS_ERR(net)) { |
| err = PTR_ERR(net); |
| goto errout; |
| } |
| |
| if (tb[IFLA_NEW_IFINDEX]) |
| new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]); |
| else |
| new_ifindex = 0; |
| |
| err = __dev_change_net_namespace(dev, net, pat, new_ifindex); |
| put_net(net); |
| if (err) |
| goto errout; |
| status |= DO_SETLINK_MODIFIED; |
| } |
| |
| if (tb[IFLA_MAP]) { |
| struct rtnl_link_ifmap *u_map; |
| struct ifmap k_map; |
| |
| if (!ops->ndo_set_config) { |
| err = -EOPNOTSUPP; |
| goto errout; |
| } |
| |
| if (!netif_device_present(dev)) { |
| err = -ENODEV; |
| goto errout; |
| } |
| |
| u_map = nla_data(tb[IFLA_MAP]); |
| k_map.mem_start = (unsigned long) u_map->mem_start; |
| k_map.mem_end = (unsigned long) u_map->mem_end; |
| k_map.base_addr = (unsigned short) u_map->base_addr; |
| k_map.irq = (unsigned char) u_map->irq; |
| k_map.dma = (unsigned char) u_map->dma; |
| k_map.port = (unsigned char) u_map->port; |
| |
| err = ops->ndo_set_config(dev, &k_map); |
| if (err < 0) |
| goto errout; |
| |
| status |= DO_SETLINK_NOTIFY; |
| } |
| |
| if (tb[IFLA_ADDRESS]) { |
| struct sockaddr *sa; |
| int len; |
| |
| len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len, |
| sizeof(*sa)); |
| sa = kmalloc(len, GFP_KERNEL); |
| if (!sa) { |
| err = -ENOMEM; |
| goto errout; |
| } |
| sa->sa_family = dev->type; |
| memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), |
| dev->addr_len); |
| err = dev_set_mac_address_user(dev, sa, extack); |
| kfree(sa); |
| if (err) |
| goto errout; |
| status |= DO_SETLINK_MODIFIED; |
| } |
| |
| if (tb[IFLA_MTU]) { |
| err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack); |
| 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), |
| extack); |
| if (err < 0) |
| goto errout; |
| } |
| |
| if (tb[IFLA_MASTER]) { |
| err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); |
| 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 int value = nla_get_u32(tb[IFLA_TXQLEN]); |
| |
| err = dev_change_tx_queue_len(dev, value); |
| if (err) |
| goto errout; |
| status |= DO_SETLINK_MODIFIED; |
| } |
| |
| if (tb[IFLA_GSO_MAX_SIZE]) { |
| u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]); |
| |
| if (dev->gso_max_size ^ max_size) { |
| netif_set_gso_max_size(dev, max_size); |
| status |= DO_SETLINK_MODIFIED; |
| } |
| } |
| |
| if (tb[IFLA_GSO_MAX_SEGS]) { |
| u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]); |
| |
| if (dev->gso_max_segs ^ max_segs) { |
| netif_set_gso_max_segs(dev, max_segs); |
| status |= DO_SETLINK_MODIFIED; |
| } |
| } |
| |
| if (tb[IFLA_GRO_MAX_SIZE]) { |
| u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_MAX_SIZE]); |
| |
| if (dev->gro_max_size ^ gro_max_size) { |
| netif_set_gro_max_size(dev, gro_max_size); |
| status |= DO_SETLINK_MODIFIED; |
| } |
| } |
| |
| if (tb[IFLA_GSO_IPV4_MAX_SIZE]) { |
| u32 max_size = nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]); |
| |
| if (dev->gso_ipv4_max_size ^ max_size) { |
| netif_set_gso_ipv4_max_size(dev, max_size); |
| status |= DO_SETLINK_MODIFIED; |
| } |
| } |
| |
| if (tb[IFLA_GRO_IPV4_MAX_SIZE]) { |
| u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]); |
| |
| if (dev->gro_ipv4_max_size ^ gro_max_size) { |
| netif_set_gro_ipv4_max_size(dev, gro_max_size); |
| status |= DO_SETLINK_MODIFIED; |
| } |
| } |
| |
| 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]); |
| |
| if (dev->link_mode ^ value) |
| status |= DO_SETLINK_NOTIFY; |
| WRITE_ONCE(dev->link_mode, value); |
| } |
| |
| 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_deprecated(vfinfo, IFLA_VF_MAX, |
| attr, |
| ifla_vf_policy, |
| NULL); |
| 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_deprecated(port, IFLA_PORT_MAX, |
| attr, |
| ifla_port_policy, |
| NULL); |
| 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_deprecated(port, IFLA_PORT_MAX, |
| tb[IFLA_PORT_SELF], |
| ifla_port_policy, NULL); |
| 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; |
| |
| BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af)))); |
| |
| err = af_ops->set_link_af(dev, af, extack); |
| if (err < 0) |
| goto errout; |
| |
| status |= DO_SETLINK_NOTIFY; |
| } |
| } |
| err = 0; |
| |
| if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) { |
| err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN], |
| tb[IFLA_PROTO_DOWN_REASON], extack); |
| if (err) |
| goto errout; |
| status |= DO_SETLINK_NOTIFY; |
| } |
| |
| if (tb[IFLA_XDP]) { |
| struct nlattr *xdp[IFLA_XDP_MAX + 1]; |
| u32 xdp_flags = 0; |
| |
| err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX, |
| tb[IFLA_XDP], |
| ifla_xdp_policy, NULL); |
| if (err < 0) |
| goto errout; |
| |
| if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) { |
| err = -EINVAL; |
| goto errout; |
| } |
| |
| if (xdp[IFLA_XDP_FLAGS]) { |
| xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); |
| if (xdp_flags & ~XDP_FLAGS_MASK) { |
| err = -EINVAL; |
| goto errout; |
| } |
| if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) { |
| err = -EINVAL; |
| goto errout; |
| } |
| } |
| |
| if (xdp[IFLA_XDP_FD]) { |
| int expected_fd = -1; |
| |
| if (xdp_flags & XDP_FLAGS_REPLACE) { |
| if (!xdp[IFLA_XDP_EXPECTED_FD]) { |
| err = -EINVAL; |
| goto errout; |
| } |
| expected_fd = |
| nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]); |
| } |
| |
| err = dev_change_xdp_fd(dev, extack, |
| nla_get_s32(xdp[IFLA_XDP_FD]), |
| expected_fd, |
| xdp_flags); |
| if (err) |
| goto errout; |
| status |= DO_SETLINK_NOTIFY; |
| } |
| } |
| |
| errout: |
| if (status & DO_SETLINK_MODIFIED) { |
| if ((status & DO_SETLINK_NOTIFY) == 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 struct net_device *rtnl_dev_get(struct net *net, |
| struct nlattr *tb[]) |
| { |
| char ifname[ALTIFNAMSIZ]; |
| |
| if (tb[IFLA_IFNAME]) |
| nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); |
| else if (tb[IFLA_ALT_IFNAME]) |
| nla_strscpy(ifname, tb[IFLA_ALT_IFNAME], ALTIFNAMSIZ); |
| else |
| return NULL; |
| |
| return __dev_get_by_name(net, ifname); |
| } |
| |
| static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct net *net = sock_net(skb->sk); |
| struct ifinfomsg *ifm; |
| struct net_device *dev; |
| int err; |
| struct nlattr *tb[IFLA_MAX+1]; |
| |
| err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, |
| ifla_policy, extack); |
| if (err < 0) |
| goto errout; |
| |
| err = rtnl_ensure_unique_netns(tb, extack, false); |
| if (err < 0) |
| goto errout; |
| |
| 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] || tb[IFLA_ALT_IFNAME]) |
| dev = rtnl_dev_get(net, tb); |
| else |
| goto errout; |
| |
| if (dev == NULL) { |
| err = -ENODEV; |
| goto errout; |
| } |
| |
| err = validate_linkmsg(dev, tb, extack); |
| if (err < 0) |
| goto errout; |
| |
| err = do_setlink(skb, dev, ifm, extack, tb, 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, u32 portid, const struct nlmsghdr *nlh) |
| { |
| 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_notify(&list_kill, portid, nlh); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(rtnl_delete_link); |
| |
| static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct net *net = sock_net(skb->sk); |
| u32 portid = NETLINK_CB(skb).portid; |
| struct net *tgt_net = net; |
| struct net_device *dev = NULL; |
| struct ifinfomsg *ifm; |
| struct nlattr *tb[IFLA_MAX+1]; |
| int err; |
| int netnsid = -1; |
| |
| err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, |
| ifla_policy, extack); |
| if (err < 0) |
| return err; |
| |
| err = rtnl_ensure_unique_netns(tb, extack, true); |
| if (err < 0) |
| return err; |
| |
| if (tb[IFLA_TARGET_NETNSID]) { |
| netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); |
| tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); |
| if (IS_ERR(tgt_net)) |
| return PTR_ERR(tgt_net); |
| } |
| |
| err = -EINVAL; |
| ifm = nlmsg_data(nlh); |
| if (ifm->ifi_index > 0) |
| dev = __dev_get_by_index(tgt_net, ifm->ifi_index); |
| else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) |
| dev = rtnl_dev_get(tgt_net, tb); |
| else if (tb[IFLA_GROUP]) |
| err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP])); |
| else |
| goto out; |
| |
| if (!dev) { |
| if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME] || ifm->ifi_index > 0) |
| err = -ENODEV; |
| |
| goto out; |
| } |
| |
| err = rtnl_delete_link(dev, portid, nlh); |
| |
| out: |
| if (netnsid >= 0) |
| put_net(tgt_net); |
| |
| return err; |
| } |
| |
| int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm, |
| u32 portid, const struct nlmsghdr *nlh) |
| { |
| 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), |
| NULL); |
| if (err < 0) |
| return err; |
| } |
| |
| if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) { |
| __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags), portid, nlh); |
| } else { |
| dev->rtnl_link_state = RTNL_LINK_INITIALIZED; |
| __dev_notify_flags(dev, old_flags, ~0U, portid, nlh); |
| } |
| 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[], |
| struct netlink_ext_ack *extack) |
| { |
| struct net_device *dev; |
| unsigned int num_tx_queues = 1; |
| unsigned int num_rx_queues = 1; |
| int err; |
| |
| if (tb[IFLA_NUM_TX_QUEUES]) |
| num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); |
| else if (ops->get_num_tx_queues) |
| num_tx_queues = ops->get_num_tx_queues(); |
| |
| if (tb[IFLA_NUM_RX_QUEUES]) |
| num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); |
| else if (ops->get_num_rx_queues) |
| num_rx_queues = ops->get_num_rx_queues(); |
| |
| if (num_tx_queues < 1 || num_tx_queues > 4096) { |
| NL_SET_ERR_MSG(extack, "Invalid number of transmit queues"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| if (num_rx_queues < 1 || num_rx_queues > 4096) { |
| NL_SET_ERR_MSG(extack, "Invalid number of receive queues"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| if (ops->alloc) { |
| dev = ops->alloc(tb, ifname, name_assign_type, |
| num_tx_queues, num_rx_queues); |
| if (IS_ERR(dev)) |
| return dev; |
| } else { |
| dev = alloc_netdev_mqs(ops->priv_size, ifname, |
| name_assign_type, ops->setup, |
| num_tx_queues, num_rx_queues); |
| } |
| |
| if (!dev) |
| return ERR_PTR(-ENOMEM); |
| |
| err = validate_linkmsg(dev, tb, extack); |
| if (err < 0) { |
| free_netdev(dev); |
| return ERR_PTR(err); |
| } |
| |
| dev_net_set(dev, net); |
| dev->rtnl_link_ops = ops; |
| dev->rtnl_link_state = RTNL_LINK_INITIALIZING; |
| |
| if (tb[IFLA_MTU]) { |
| u32 mtu = nla_get_u32(tb[IFLA_MTU]); |
| |
| err = dev_validate_mtu(dev, mtu, extack); |
| if (err) { |
| free_netdev(dev); |
| return ERR_PTR(err); |
| } |
| dev->mtu = mtu; |
| } |
| if (tb[IFLA_ADDRESS]) { |
| __dev_addr_set(dev, 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])); |
| if (tb[IFLA_GSO_MAX_SIZE]) |
| netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE])); |
| if (tb[IFLA_GSO_MAX_SEGS]) |
| netif_set_gso_max_segs(dev, nla_get_u32(tb[IFLA_GSO_MAX_SEGS])); |
| if (tb[IFLA_GRO_MAX_SIZE]) |
| netif_set_gro_max_size(dev, nla_get_u32(tb[IFLA_GRO_MAX_SIZE])); |
| if (tb[IFLA_GSO_IPV4_MAX_SIZE]) |
| netif_set_gso_ipv4_max_size(dev, nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE])); |
| if (tb[IFLA_GRO_IPV4_MAX_SIZE]) |
| netif_set_gro_ipv4_max_size(dev, nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE])); |
| |
| return dev; |
| } |
| EXPORT_SYMBOL(rtnl_create_link); |
| |
| static int rtnl_group_changelink(const struct sk_buff *skb, |
| struct net *net, int group, |
| struct ifinfomsg *ifm, |
| struct netlink_ext_ack *extack, |
| struct nlattr **tb) |
| { |
| struct net_device *dev, *aux; |
| int err; |
| |
| for_each_netdev_safe(net, dev, aux) { |
| if (dev->group == group) { |
| err = validate_linkmsg(dev, tb, extack); |
| if (err < 0) |
| return err; |
| err = do_setlink(skb, dev, ifm, extack, tb, 0); |
| if (err < 0) |
| return err; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm, |
| const struct rtnl_link_ops *ops, |
| const struct nlmsghdr *nlh, |
| struct nlattr **tb, struct nlattr **data, |
| struct netlink_ext_ack *extack) |
| { |
| unsigned char name_assign_type = NET_NAME_USER; |
| struct net *net = sock_net(skb->sk); |
| u32 portid = NETLINK_CB(skb).portid; |
| struct net *dest_net, *link_net; |
| struct net_device *dev; |
| char ifname[IFNAMSIZ]; |
| int err; |
| |
| if (!ops->alloc && !ops->setup) |
| return -EOPNOTSUPP; |
| |
| if (tb[IFLA_IFNAME]) { |
| nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); |
| } else { |
| snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); |
| name_assign_type = NET_NAME_ENUM; |
| } |
| |
| dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN); |
| if (IS_ERR(dest_net)) |
| return PTR_ERR(dest_net); |
| |
| 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) { |
| NL_SET_ERR_MSG(extack, "Unknown network namespace id"); |
| err = -EINVAL; |
| goto out; |
| } |
| err = -EPERM; |
| if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) |
| goto out; |
| } else { |
| link_net = NULL; |
| } |
| |
| dev = rtnl_create_link(link_net ? : dest_net, ifname, |
| name_assign_type, ops, tb, extack); |
| 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, extack); |
| else |
| err = register_netdevice(dev); |
| if (err < 0) { |
| free_netdev(dev); |
| goto out; |
| } |
| |
| err = rtnl_configure_link(dev, ifm, portid, nlh); |
| if (err < 0) |
| goto out_unregister; |
| if (link_net) { |
| err = dev_change_net_namespace(dev, dest_net, ifname); |
| if (err < 0) |
| goto out_unregister; |
| } |
| if (tb[IFLA_MASTER]) { |
| err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); |
| if (err) |
| 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; |
| } |
| |
| struct rtnl_newlink_tbs { |
| struct nlattr *tb[IFLA_MAX + 1]; |
| struct nlattr *attr[RTNL_MAX_TYPE + 1]; |
| struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1]; |
| }; |
| |
| static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct rtnl_newlink_tbs *tbs, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *linkinfo[IFLA_INFO_MAX + 1]; |
| struct nlattr ** const tb = tbs->tb; |
| const struct rtnl_link_ops *m_ops; |
| struct net_device *master_dev; |
| struct net *net = sock_net(skb->sk); |
| const struct rtnl_link_ops *ops; |
| struct nlattr **slave_data; |
| char kind[MODULE_NAME_LEN]; |
| struct net_device *dev; |
| struct ifinfomsg *ifm; |
| struct nlattr **data; |
| bool link_specified; |
| int err; |
| |
| #ifdef CONFIG_MODULES |
| replay: |
| #endif |
| err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, |
| ifla_policy, extack); |
| if (err < 0) |
| return err; |
| |
| err = rtnl_ensure_unique_netns(tb, extack, false); |
| if (err < 0) |
| return err; |
| |
| ifm = nlmsg_data(nlh); |
| if (ifm->ifi_index > 0) { |
| link_specified = true; |
| dev = __dev_get_by_index(net, ifm->ifi_index); |
| } else if (ifm->ifi_index < 0) { |
| NL_SET_ERR_MSG(extack, "ifindex can't be negative"); |
| return -EINVAL; |
| } else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) { |
| link_specified = true; |
| dev = rtnl_dev_get(net, tb); |
| } else { |
| link_specified = false; |
| dev = NULL; |
| } |
| |
| master_dev = NULL; |
| m_ops = NULL; |
| if (dev) { |
| master_dev = netdev_master_upper_dev_get(dev); |
| if (master_dev) |
| m_ops = master_dev->rtnl_link_ops; |
| } |
| |
| if (tb[IFLA_LINKINFO]) { |
| err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX, |
| tb[IFLA_LINKINFO], |
| ifla_info_policy, NULL); |
| if (err < 0) |
| return err; |
| } else |
| memset(linkinfo, 0, sizeof(linkinfo)); |
| |
| if (linkinfo[IFLA_INFO_KIND]) { |
| nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); |
| ops = rtnl_link_ops_get(kind); |
| } else { |
| kind[0] = '\0'; |
| ops = NULL; |
| } |
| |
| data = NULL; |
| if (ops) { |
| if (ops->maxtype > RTNL_MAX_TYPE) |
| return -EINVAL; |
| |
| if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { |
| err = nla_parse_nested_deprecated(tbs->attr, ops->maxtype, |
| linkinfo[IFLA_INFO_DATA], |
| ops->policy, extack); |
| if (err < 0) |
| return err; |
| data = tbs->attr; |
| } |
| if (ops->validate) { |
| err = ops->validate(tb, data, extack); |
| if (err < 0) |
| return err; |
| } |
| } |
| |
| slave_data = NULL; |
| if (m_ops) { |
| if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE) |
| return -EINVAL; |
| |
| if (m_ops->slave_maxtype && |
| linkinfo[IFLA_INFO_SLAVE_DATA]) { |
| err = nla_parse_nested_deprecated(tbs->slave_attr, |
| m_ops->slave_maxtype, |
| linkinfo[IFLA_INFO_SLAVE_DATA], |
| m_ops->slave_policy, |
| extack); |
| if (err < 0) |
| return err; |
| slave_data = tbs->slave_attr; |
| } |
| } |
| |
| if (dev) { |
| int status = 0; |
| |
| if (nlh->nlmsg_flags & NLM_F_EXCL) |
| return -EEXIST; |
| if (nlh->nlmsg_flags & NLM_F_REPLACE) |
| return -EOPNOTSUPP; |
| |
| err = validate_linkmsg(dev, tb, extack); |
| if (err < 0) |
| return err; |
| |
| if (linkinfo[IFLA_INFO_DATA]) { |
| if (!ops || ops != dev->rtnl_link_ops || |
| !ops->changelink) |
| return -EOPNOTSUPP; |
| |
| err = ops->changelink(dev, tb, data, extack); |
| 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, extack); |
| if (err < 0) |
| return err; |
| status |= DO_SETLINK_NOTIFY; |
| } |
| |
| return do_setlink(skb, dev, ifm, extack, tb, status); |
| } |
| |
| if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { |
| /* No dev found and NLM_F_CREATE not set. Requested dev does not exist, |
| * or it's for a group |
| */ |
| if (link_specified) |
| return -ENODEV; |
| if (tb[IFLA_GROUP]) |
| return rtnl_group_changelink(skb, net, |
| nla_get_u32(tb[IFLA_GROUP]), |
| ifm, extack, tb); |
| return -ENODEV; |
| } |
| |
| if (tb[IFLA_MAP] || 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 |
| NL_SET_ERR_MSG(extack, "Unknown device type"); |
| return -EOPNOTSUPP; |
| } |
| |
| return rtnl_newlink_create(skb, ifm, ops, nlh, tb, data, extack); |
| } |
| |
| static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct rtnl_newlink_tbs *tbs; |
| int ret; |
| |
| tbs = kmalloc(sizeof(*tbs), GFP_KERNEL); |
| if (!tbs) |
| return -ENOMEM; |
| |
| ret = __rtnl_newlink(skb, nlh, tbs, extack); |
| kfree(tbs); |
| return ret; |
| } |
| |
| static int rtnl_valid_getlink_req(struct sk_buff *skb, |
| const struct nlmsghdr *nlh, |
| struct nlattr **tb, |
| struct netlink_ext_ack *extack) |
| { |
| struct ifinfomsg *ifm; |
| int i, err; |
| |
| if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { |
| NL_SET_ERR_MSG(extack, "Invalid header for get link"); |
| return -EINVAL; |
| } |
| |
| if (!netlink_strict_get_check(skb)) |
| return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, |
| ifla_policy, extack); |
| |
| ifm = nlmsg_data(nlh); |
| if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || |
| ifm->ifi_change) { |
| NL_SET_ERR_MSG(extack, "Invalid values in header for get link request"); |
| return -EINVAL; |
| } |
| |
| err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX, |
| ifla_policy, extack); |
| if (err) |
| return err; |
| |
| for (i = 0; i <= IFLA_MAX; i++) { |
| if (!tb[i]) |
| continue; |
| |
| switch (i) { |
| case IFLA_IFNAME: |
| case IFLA_ALT_IFNAME: |
| case IFLA_EXT_MASK: |
| case IFLA_TARGET_NETNSID: |
| break; |
| default: |
| NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request"); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct net *net = sock_net(skb->sk); |
| struct net *tgt_net = net; |
| struct ifinfomsg *ifm; |
| struct nlattr *tb[IFLA_MAX+1]; |
| struct net_device *dev = NULL; |
| struct sk_buff *nskb; |
| int netnsid = -1; |
| int err; |
| u32 ext_filter_mask = 0; |
| |
| err = rtnl_valid_getlink_req(skb, nlh, tb, extack); |
| if (err < 0) |
| return err; |
| |
| err = rtnl_ensure_unique_netns(tb, extack, true); |
| if (err < 0) |
| return err; |
| |
| if (tb[IFLA_TARGET_NETNSID]) { |
| netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); |
| tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); |
| if (IS_ERR(tgt_net)) |
| return PTR_ERR(tgt_net); |
| } |
| |
| if (tb[IFLA_EXT_MASK]) |
| ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); |
| |
| err = -EINVAL; |
| ifm = nlmsg_data(nlh); |
| if (ifm->ifi_index > 0) |
| dev = __dev_get_by_index(tgt_net, ifm->ifi_index); |
| else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) |
| dev = rtnl_dev_get(tgt_net, tb); |
| else |
| goto out; |
| |
| err = -ENODEV; |
| if (dev == NULL) |
| goto out; |
| |
| err = -ENOBUFS; |
| nskb = nlmsg_new_large(if_nlmsg_size(dev, ext_filter_mask)); |
| if (nskb == NULL) |
| goto out; |
| |
| /* Synchronize the carrier state so we don't report a state |
| * that we're not actually going to honour immediately; if |
| * the driver just did a carrier off->on transition, we can |
| * only TX if link watch work has run, but without this we'd |
| * already report carrier on, even if it doesn't work yet. |
| */ |
| linkwatch_sync_dev(dev); |
| |
| err = rtnl_fill_ifinfo(nskb, dev, net, |
| RTM_NEWLINK, NETLINK_CB(skb).portid, |
| nlh->nlmsg_seq, 0, 0, ext_filter_mask, |
| 0, NULL, 0, netnsid, GFP_KERNEL); |
| 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); |
| out: |
| if (netnsid >= 0) |
| put_net(tgt_net); |
| |
| return err; |
| } |
| |
| static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr, |
| bool *changed, struct netlink_ext_ack *extack) |
| { |
| char *alt_ifname; |
| size_t size; |
| int err; |
| |
| err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack); |
| if (err) |
| return err; |
| |
| if (cmd == RTM_NEWLINKPROP) { |
| size = rtnl_prop_list_size(dev); |
| size += nla_total_size(ALTIFNAMSIZ); |
| if (size >= U16_MAX) { |
| NL_SET_ERR_MSG(extack, |
| "effective property list too long"); |
| return -EINVAL; |
| } |
| } |
| |
| alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT); |
| if (!alt_ifname) |
| return -ENOMEM; |
| |
| if (cmd == RTM_NEWLINKPROP) { |
| err = netdev_name_node_alt_create(dev, alt_ifname); |
| if (!err) |
| alt_ifname = NULL; |
| } else if (cmd == RTM_DELLINKPROP) { |
| err = netdev_name_node_alt_destroy(dev, alt_ifname); |
| } else { |
| WARN_ON_ONCE(1); |
| err = -EINVAL; |
| } |
| |
| kfree(alt_ifname); |
| if (!err) |
| *changed = true; |
| return err; |
| } |
| |
| static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct net *net = sock_net(skb->sk); |
| struct nlattr *tb[IFLA_MAX + 1]; |
| struct net_device *dev; |
| struct ifinfomsg *ifm; |
| bool changed = false; |
| struct nlattr *attr; |
| int err, rem; |
| |
| err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); |
| if (err) |
| return err; |
| |
| err = rtnl_ensure_unique_netns(tb, extack, true); |
| if (err) |
| return err; |
| |
| ifm = nlmsg_data(nlh); |
| if (ifm->ifi_index > 0) |
| dev = __dev_get_by_index(net, ifm->ifi_index); |
| else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) |
| dev = rtnl_dev_get(net, tb); |
| else |
| return -EINVAL; |
| |
| if (!dev) |
| return -ENODEV; |
| |
| if (!tb[IFLA_PROP_LIST]) |
| return 0; |
| |
| nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) { |
| switch (nla_type(attr)) { |
| case IFLA_ALT_IFNAME: |
| err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack); |
| if (err) |
| return err; |
| break; |
| } |
| } |
| |
| if (changed) |
| netdev_state_change(dev); |
| return 0; |
| } |
| |
| static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack); |
| } |
| |
| static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack); |
| } |
| |
| static noinline_for_stack u32 rtnl_calcit(struct sk_buff *skb, |
| struct nlmsghdr *nlh) |
| { |
| struct net *net = sock_net(skb->sk); |
| size_t min_ifinfo_dump_size = 0; |
| u32 ext_filter_mask = 0; |
| struct net_device *dev; |
| struct nlattr *nla; |
| int hdrlen, rem; |
| |
| /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ |
| hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? |
| sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); |
| |
| if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) |
| return NLMSG_GOODSIZE; |
| |
| nla_for_each_attr_type(nla, IFLA_EXT_MASK, |
| nlmsg_attrdata(nlh, hdrlen), |
| nlmsg_attrlen(nlh, hdrlen), rem) { |
| if (nla_len(nla) == sizeof(u32)) |
| ext_filter_mask = nla_get_u32(nla); |
| } |
| |
| if (!ext_filter_mask) |
| return NLMSG_GOODSIZE; |
| /* |
| * traverse the list of net devices and compute the minimum |
| * buffer size based upon the filter mask. |
| */ |
| rcu_read_lock(); |
| for_each_netdev_rcu(net, dev) { |
| min_ifinfo_dump_size = max(min_ifinfo_dump_size, |
| if_nlmsg_size(dev, ext_filter_mask)); |
| } |
| rcu_read_unlock(); |
| |
| return nlmsg_total_size(min_ifinfo_dump_size); |
| } |
| |
| static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) |
| { |
| int idx; |
| int s_idx = cb->family; |
| int type = cb->nlh->nlmsg_type - RTM_BASE; |
| int ret = 0; |
| |
| if (s_idx == 0) |
| s_idx = 1; |
| |
| for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { |
| struct rtnl_link __rcu **tab; |
| struct rtnl_link *link; |
| rtnl_dumpit_func dumpit; |
| |
| if (idx < s_idx || idx == PF_PACKET) |
| continue; |
| |
| if (type < 0 || type >= RTM_NR_MSGTYPES) |
| continue; |
| |
| tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]); |
| if (!tab) |
| continue; |
| |
| link = rcu_dereference_rtnl(tab[type]); |
| if (!link) |
| continue; |
| |
| dumpit = link->dumpit; |
| if (!dumpit) |
| continue; |
| |
| if (idx > s_idx) { |
| memset(&cb->args[0], 0, sizeof(cb->args)); |
| cb->prev_seq = 0; |
| cb->seq = 0; |
| } |
| ret = dumpit(skb, cb); |
| if (ret) |
| break; |
| } |
| cb->family = idx; |
| |
| return skb->len ? : ret; |
| } |
| |
| struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, |
| unsigned int change, |
| u32 event, gfp_t flags, int *new_nsid, |
| int new_ifindex, u32 portid, |
| const struct nlmsghdr *nlh) |
| { |
| struct net *net = dev_net(dev); |
| struct sk_buff *skb; |
| int err = -ENOBUFS; |
| u32 seq = 0; |
| |
| skb = nlmsg_new(if_nlmsg_size(dev, 0), flags); |
| if (skb == NULL) |
| goto errout; |
| |
| if (nlmsg_report(nlh)) |
| seq = nlmsg_seq(nlh); |
| else |
| portid = 0; |
| |
| err = rtnl_fill_ifinfo(skb, dev, dev_net(dev), |
| type, portid, seq, change, 0, 0, event, |
| new_nsid, new_ifindex, -1, flags); |
| if (err < 0) { |
| /* -EMSGSIZE implies BUG in if_nlmsg_size() */ |
| WARN_ON(err == -EMSGSIZE); |
| kfree_skb(skb); |
| goto errout; |
| } |
| return skb; |
| errout: |
| 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, |
| u32 portid, const struct nlmsghdr *nlh) |
| { |
| struct net *net = dev_net(dev); |
| |
| rtnl_notify(skb, net, portid, RTNLGRP_LINK, nlh, flags); |
| } |
| |
| static void rtmsg_ifinfo_event(int type, struct net_device *dev, |
| unsigned int change, u32 event, |
| gfp_t flags, int *new_nsid, int new_ifindex, |
| u32 portid, const struct nlmsghdr *nlh) |
| { |
| struct sk_buff *skb; |
| |
| if (dev->reg_state != NETREG_REGISTERED) |
| return; |
| |
| skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid, |
| new_ifindex, portid, nlh); |
| if (skb) |
| rtmsg_ifinfo_send(skb, dev, flags, portid, nlh); |
| } |
| |
| void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, |
| gfp_t flags, u32 portid, const struct nlmsghdr *nlh) |
| { |
| rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, |
| NULL, 0, portid, nlh); |
| } |
| |
| void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change, |
| gfp_t flags, int *new_nsid, int new_ifindex) |
| { |
| rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, |
| new_nsid, new_ifindex, 0, NULL); |
| } |
| |
| 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, dev->addr_len, 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(const struct net_device *dev) |
| { |
| return NLMSG_ALIGN(sizeof(struct ndmsg)) + |
| nla_total_size(dev->addr_len) + /* NDA_LLADDR */ |
| nla_total_size(sizeof(u16)) + /* NDA_VLAN */ |
| 0; |
| } |
| |
| static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, |
| u16 ndm_state) |
| { |
| struct net *net = dev_net(dev); |
| struct sk_buff *skb; |
| int err = -ENOBUFS; |
| |
| skb = nlmsg_new(rtnl_fdb_nlmsg_size(dev), 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)) { |
| netdev_info(dev, "default FDB implementation only supports local addresses\n"); |
| return err; |
| } |
| |
| if (tb[NDA_FLAGS_EXT]) { |
| netdev_info(dev, "invalid flags given to default FDB implementation\n"); |
| return err; |
| } |
| |
| if (vid) { |
| netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n"); |
| 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, |
| struct netlink_ext_ack *extack) |
| { |
| u16 vid = 0; |
| |
| if (vlan_attr) { |
| if (nla_len(vlan_attr) != sizeof(u16)) { |
| NL_SET_ERR_MSG(extack, "invalid vlan attribute size"); |
| return -EINVAL; |
| } |
| |
| vid = nla_get_u16(vlan_attr); |
| |
| if (!vid || vid >= VLAN_VID_MASK) { |
| NL_SET_ERR_MSG(extack, "invalid vlan id"); |
| return -EINVAL; |
| } |
| } |
| *p_vid = vid; |
| return 0; |
| } |
| |
| static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| 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_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, |
| extack); |
| if (err < 0) |
| return err; |
| |
| ndm = nlmsg_data(nlh); |
| if (ndm->ndm_ifindex == 0) { |
| NL_SET_ERR_MSG(extack, "invalid ifindex"); |
| return -EINVAL; |
| } |
| |
| dev = __dev_get_by_index(net, ndm->ndm_ifindex); |
| if (dev == NULL) { |
| NL_SET_ERR_MSG(extack, "unknown ifindex"); |
| return -ENODEV; |
| } |
| |
| if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { |
| NL_SET_ERR_MSG(extack, "invalid address"); |
| return -EINVAL; |
| } |
| |
| if (dev->type != ARPHRD_ETHER) { |
| NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices"); |
| return -EINVAL; |
| } |
| |
| addr = nla_data(tb[NDA_LLADDR]); |
| |
| err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); |
| 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) && |
| netif_is_bridge_port(dev)) { |
| 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, extack); |
| 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, |
| extack); |
| 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)) { |
| netdev_info(dev, "default FDB implementation only supports local addresses\n"); |
| 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 netlink_ext_ack *extack) |
| { |
| bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK); |
| struct net *net = sock_net(skb->sk); |
| const struct net_device_ops *ops; |
| struct ndmsg *ndm; |
| struct nlattr *tb[NDA_MAX+1]; |
| struct net_device *dev; |
| __u8 *addr = NULL; |
| int err; |
| u16 vid; |
| |
| if (!netlink_capable(skb, CAP_NET_ADMIN)) |
| return -EPERM; |
| |
| if (!del_bulk) { |
| err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, |
| NULL, extack); |
| } else { |
| /* For bulk delete, the drivers will parse the message with |
| * policy. |
| */ |
| err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack); |
| } |
| if (err < 0) |
| return err; |
| |
| ndm = nlmsg_data(nlh); |
| if (ndm->ndm_ifindex == 0) { |
| NL_SET_ERR_MSG(extack, "invalid ifindex"); |
| return -EINVAL; |
| } |
| |
| dev = __dev_get_by_index(net, ndm->ndm_ifindex); |
| if (dev == NULL) { |
| NL_SET_ERR_MSG(extack, "unknown ifindex"); |
| return -ENODEV; |
| } |
| |
| if (!del_bulk) { |
| if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { |
| NL_SET_ERR_MSG(extack, "invalid address"); |
| return -EINVAL; |
| } |
| addr = nla_data(tb[NDA_LLADDR]); |
| |
| err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); |
| if (err) |
| return err; |
| } |
| |
| if (dev->type != ARPHRD_ETHER) { |
| NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices"); |
| return -EINVAL; |
| } |
| |
| err = -EOPNOTSUPP; |
| |
| /* Support fdb on master device the net/bridge default case */ |
| if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && |
| netif_is_bridge_port(dev)) { |
| struct net_device *br_dev = netdev_master_upper_dev_get(dev); |
| |
| ops = br_dev->netdev_ops; |
| if (!del_bulk) { |
| if (ops->ndo_fdb_del) |
| err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack); |
| } else { |
| if (ops->ndo_fdb_del_bulk) |
| err = ops->ndo_fdb_del_bulk(nlh, dev, extack); |
| } |
| |
| if (err) |
| goto out; |
| else |
| ndm->ndm_flags &= ~NTF_MASTER; |
| } |
| |
| /* Embedded bridge, macvlan, and any other device support */ |
| if (ndm->ndm_flags & NTF_SELF) { |
| ops = dev->netdev_ops; |
| if (!del_bulk) { |
| if (ops->ndo_fdb_del) |
| err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack); |
| else |
| err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); |
| } else { |
| /* in case err was cleared by NTF_MASTER call */ |
| err = -EOPNOTSUPP; |
| if (ops->ndo_fdb_del_bulk) |
| err = ops->ndo_fdb_del_bulk(nlh, dev, extack); |
| } |
| |
| if (!err) { |
| if (!del_bulk) |
| 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[2]) |
| 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. |
| * @skb: socket buffer to store message in |
| * @cb: netlink callback |
| * @dev: netdevice |
| * @filter_dev: ignored |
| * @idx: the number of FDB table entries dumped is added to *@idx |
| * |
| * Default netdevice operation to dump the existing unicast address list. |
| * Returns number of addresses from list put in skb. |
| */ |
| int ndo_dflt_fdb_dump(struct sk_buff *skb, |
| struct netlink_callback *cb, |
| struct net_device *dev, |
| struct net_device *filter_dev, |
| int *idx) |
| { |
| int err; |
| |
| if (dev->type != ARPHRD_ETHER) |
| return -EINVAL; |
| |
| netif_addr_lock_bh(dev); |
| err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); |
| if (err) |
| goto out; |
| err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); |
| out: |
| netif_addr_unlock_bh(dev); |
| return err; |
| } |
| EXPORT_SYMBOL(ndo_dflt_fdb_dump); |
| |
| static int valid_fdb_dump_strict(const struct nlmsghdr *nlh, |
| int *br_idx, int *brport_idx, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[NDA_MAX + 1]; |
| struct ndmsg *ndm; |
| int err, i; |
| |
| if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) { |
| NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request"); |
| return -EINVAL; |
| } |
| |
| ndm = nlmsg_data(nlh); |
| if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state || |
| ndm->ndm_flags || ndm->ndm_type) { |
| NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request"); |
| return -EINVAL; |
| } |
| |
| err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb, |
| NDA_MAX, NULL, extack); |
| if (err < 0) |
| return err; |
| |
| *brport_idx = ndm->ndm_ifindex; |
| for (i = 0; i <= NDA_MAX; ++i) { |
| if (!tb[i]) |
| continue; |
| |
| switch (i) { |
| case NDA_IFINDEX: |
| if (nla_len(tb[i]) != sizeof(u32)) { |
| NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request"); |
| return -EINVAL; |
| } |
| *brport_idx = nla_get_u32(tb[NDA_IFINDEX]); |
| break; |
| case NDA_MASTER: |
| if (nla_len(tb[i]) != sizeof(u32)) { |
| NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request"); |
| return -EINVAL; |
| } |
| *br_idx = nla_get_u32(tb[NDA_MASTER]); |
| break; |
| default: |
| NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request"); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh, |
| int *br_idx, int *brport_idx, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[IFLA_MAX+1]; |
| int err; |
| |
| /* A hack to preserve kernel<->userspace interface. |
| * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0. |
| * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails. |
| * So, check for ndmsg with an optional u32 attribute (not used here). |
| * Fortunately these sizes don't conflict with the size of ifinfomsg |
| * with an optional attribute. |
| */ |
| if (nlmsg_len(nlh) != sizeof(struct ndmsg) && |
| (nlmsg_len(nlh) != sizeof(struct ndmsg) + |
| nla_attr_size(sizeof(u32)))) { |
| struct ifinfomsg *ifm; |
| |
| err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), |
| tb, IFLA_MAX, ifla_policy, |
| extack); |
| if (err < 0) { |
| return -EINVAL; |
| } else if (err == 0) { |
| if (tb[IFLA_MASTER]) |
| *br_idx = nla_get_u32(tb[IFLA_MASTER]); |
| } |
| |
| ifm = nlmsg_data(nlh); |
| *brport_idx = ifm->ifi_index; |
| } |
| return 0; |
| } |
| |
| static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| { |
| struct net_device *dev; |
| struct net_device *br_dev = NULL; |
| const struct net_device_ops *ops = NULL; |
| const struct net_device_ops *cops = NULL; |
| struct net *net = sock_net(skb->sk); |
| struct hlist_head *head; |
| int brport_idx = 0; |
| int br_idx = 0; |
| int h, s_h; |
| int idx = 0, s_idx; |
| int err = 0; |
| int fidx = 0; |
| |
| if (cb->strict_check) |
| err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx, |
| cb->extack); |
| else |
| err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx, |
| cb->extack); |
| if (err < 0) |
| return err; |
| |
| if (br_idx) { |
| br_dev = __dev_get_by_index(net, br_idx); |
| if (!br_dev) |
| return -ENODEV; |
| |
| ops = br_dev->netdev_ops; |
| } |
| |
| s_h = cb->args[0]; |
| s_idx = cb->args[1]; |
| |
| 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 (brport_idx && (dev->ifindex != brport_idx)) |
| continue; |
| |
| if (!br_idx) { /* user did not specify a specific bridge */ |
| if (netif_is_bridge_port(dev)) { |
| br_dev = netdev_master_upper_dev_get(dev); |
| cops = br_dev->netdev_ops; |
| } |
| } else { |
| if (dev != br_dev && |
| !netif_is_bridge_port(dev)) |
| continue; |
| |
| if (br_dev != netdev_master_upper_dev_get(dev) && |
| !netif_is_bridge_master(dev)) |
| continue; |
| cops = ops; |
| } |
| |
| if (idx < s_idx) |
| goto cont; |
| |
| if (netif_is_bridge_port(dev)) { |
| if (cops && cops->ndo_fdb_dump) { |
| err = cops->ndo_fdb_dump(skb, cb, |
| br_dev, dev, |
| &fidx); |
| if (err == -EMSGSIZE) |
| goto out; |
| } |
| } |
| |
| if (dev->netdev_ops->ndo_fdb_dump) |
| err = dev->netdev_ops->ndo_fdb_dump(skb, cb, |
| dev, NULL, |
| &fidx); |
| else |
| err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, |
| &fidx); |
| if (err == -EMSGSIZE) |
| goto out; |
| |
| cops = NULL; |
| |
| /* reset fdb offset to 0 for rest of the interfaces */ |
| cb->args[2] = 0; |
| fidx = 0; |
| cont: |
| idx++; |
| } |
| } |
| |
| out: |
| cb->args[0] = h; |
| cb->args[1] = idx; |
| cb->args[2] = fidx; |
| |
| return skb->len; |
| } |
| |
| static int valid_fdb_get_strict(const struct nlmsghdr *nlh, |
| struct nlattr **tb, u8 *ndm_flags, |
| int *br_idx, int *brport_idx, u8 **addr, |
| u16 *vid, struct netlink_ext_ack *extack) |
| { |
| struct ndmsg *ndm; |
| int err, i; |
| |
| if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) { |
| NL_SET_ERR_MSG(extack, "Invalid header for fdb get request"); |
| return -EINVAL; |
| } |
| |
| ndm = nlmsg_data(nlh); |
| if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state || |
| ndm->ndm_type) { |
| NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request"); |
| return -EINVAL; |
| } |
| |
| if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) { |
| NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request"); |
| return -EINVAL; |
| } |
| |
| err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb, |
| NDA_MAX, nda_policy, extack); |
| if (err < 0) |
| return err; |
| |
| *ndm_flags = ndm->ndm_flags; |
| *brport_idx = ndm->ndm_ifindex; |
| for (i = 0; i <= NDA_MAX; ++i) { |
| if (!tb[i]) |
| continue; |
| |
| switch (i) { |
| case NDA_MASTER: |
| *br_idx = nla_get_u32(tb[i]); |
| break; |
| case NDA_LLADDR: |
| if (nla_len(tb[i]) != ETH_ALEN) { |
| NL_SET_ERR_MSG(extack, "Invalid address in fdb get request"); |
| return -EINVAL; |
| } |
| *addr = nla_data(tb[i]); |
| break; |
| case NDA_VLAN: |
| err = fdb_vid_parse(tb[i], vid, extack); |
| if (err) |
| return err; |
| break; |
| case NDA_VNI: |
| break; |
| default: |
| NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request"); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct net_device *dev = NULL, *br_dev = NULL; |
| const struct net_device_ops *ops = NULL; |
| struct net *net = sock_net(in_skb->sk); |
| struct nlattr *tb[NDA_MAX + 1]; |
| struct sk_buff *skb; |
| int brport_idx = 0; |
| u8 ndm_flags = 0; |
| int br_idx = 0; |
| u8 *addr = NULL; |
| u16 vid = 0; |
| int err; |
| |
| err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx, |
| &brport_idx, &addr, &vid, extack); |
| if (err < 0) |
| return err; |
| |
| if (!addr) { |
| NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request"); |
| return -EINVAL; |
| } |
| |
| if (brport_idx) { |
| dev = __dev_get_by_index(net, brport_idx); |
| if (!dev) { |
| NL_SET_ERR_MSG(extack, "Unknown device ifindex"); |
| return -ENODEV; |
| } |
| } |
| |
| if (br_idx) { |
| if (dev) { |
| NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive"); |
| return -EINVAL; |
| } |
| |
| br_dev = __dev_get_by_index(net, br_idx); |
| if (!br_dev) { |
| NL_SET_ERR_MSG(extack, "Invalid master ifindex"); |
| return -EINVAL; |
| } |
| ops = br_dev->netdev_ops; |
| } |
| |
| if (dev) { |
| if (!ndm_flags || (ndm_flags & NTF_MASTER)) { |
| if (!netif_is_bridge_port(dev)) { |
| NL_SET_ERR_MSG(extack, "Device is not a bridge port"); |
| return -EINVAL; |
| } |
| br_dev = netdev_master_upper_dev_get(dev); |
| if (!br_dev) { |
| NL_SET_ERR_MSG(extack, "Master of device not found"); |
| return -EINVAL; |
| } |
| ops = br_dev->netdev_ops; |
| } else { |
| if (!(ndm_flags & NTF_SELF)) { |
| NL_SET_ERR_MSG(extack, "Missing NTF_SELF"); |
| return -EINVAL; |
| } |
| ops = dev->netdev_ops; |
| } |
| } |
| |
| if (!br_dev && !dev) { |
| NL_SET_ERR_MSG(extack, "No device specified"); |
| return -ENODEV; |
| } |
| |
| if (!ops || !ops->ndo_fdb_get) { |
| NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device"); |
| return -EOPNOTSUPP; |
| } |
| |
| skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| if (!skb) |
| return -ENOBUFS; |
| |
| if (br_dev) |
| dev = br_dev; |
| err = ops->ndo_fdb_get(skb, tb, dev, addr, vid, |
| NETLINK_CB(in_skb).portid, |
| nlh->nlmsg_seq, extack); |
| if (err) |
| goto out; |
| |
| return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
| out: |
| kfree_skb(skb); |
| return err; |
| } |
| |
| 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_noflag(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); |
| 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) || |
| brport_nla_put_flag(skb, flags, mask, |
| IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) || |
| brport_nla_put_flag(skb, flags, mask, |
| IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) { |
| 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 valid_bridge_getlink_req(const struct nlmsghdr *nlh, |
| bool strict_check, u32 *filter_mask, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[IFLA_MAX+1]; |
| int err, i; |
| |
| if (strict_check) { |
| struct ifinfomsg *ifm; |
| |
| if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { |
| NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump"); |
| return -EINVAL; |
| } |
| |
| ifm = nlmsg_data(nlh); |
| if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || |
| ifm->ifi_change || ifm->ifi_index) { |
| NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request"); |
| return -EINVAL; |
| } |
| |
| err = nlmsg_parse_deprecated_strict(nlh, |
| sizeof(struct ifinfomsg), |
| tb, IFLA_MAX, ifla_policy, |
| extack); |
| } else { |
| err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), |
| tb, IFLA_MAX, ifla_policy, |
| extack); |
| } |
| if (err < 0) |
| return err; |
| |
| /* new attributes should only be added with strict checking */ |
| for (i = 0; i <= IFLA_MAX; ++i) { |
| if (!tb[i]) |
| continue; |
| |
| switch (i) { |
| case IFLA_EXT_MASK: |
| *filter_mask = nla_get_u32(tb[i]); |
| break; |
| default: |
| if (strict_check) { |
| NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request"); |
| return -EINVAL; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) |
| { |
| const struct nlmsghdr *nlh = cb->nlh; |
| struct net *net = sock_net(skb->sk); |
| struct net_device *dev; |
| int idx = 0; |
| u32 portid = NETLINK_CB(cb->skb).portid; |
| u32 seq = nlh->nlmsg_seq; |
| u32 filter_mask = 0; |
| int err; |
| |
| err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask, |
| cb->extack); |
| if (err < 0 && cb->strict_check) |
| return err; |
| |
| rcu_read_lock(); |
| for_each_netdev_rcu(net, dev) { |
| const struct net_device_ops *ops = dev->netdev_ops; |
| struct net_device *br_dev = netdev_master_upper_dev_get(dev); |
| |
| if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { |
| if (idx >= cb->args[0]) { |
| err = br_dev->netdev_ops->ndo_bridge_getlink( |
| skb, portid, seq, dev, |
| filter_mask, NLM_F_MULTI); |
| if (err < 0 && err != -EOPNOTSUPP) { |
| if (likely(skb->len)) |
| break; |
| |
| goto out_err; |
| } |
| } |
| idx++; |
| } |
| |
| if (ops->ndo_bridge_getlink) { |
| if (idx >= cb->args[0]) { |
| err = ops->ndo_bridge_getlink(skb, portid, |
| seq, dev, |
| filter_mask, |
| NLM_F_MULTI); |
| if (err < 0 && err != -EOPNOTSUPP) { |
| if (likely(skb->len)) |
| break; |
| |
| goto out_err; |
| } |
| } |
| idx++; |
| } |
| } |
| err = skb->len; |
| out_err: |
| rcu_read_unlock(); |
| cb->args[0] = idx; |
| |
| return err; |
| } |
| |
| static inline size_t bridge_nlmsg_size(void) |
| { |
| return NLMSG_ALIGN(sizeof(struct ifinfomsg)) |
| + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ |
| + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
| + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ |
| + nla_total_size(sizeof(u32)) /* IFLA_MTU */ |
| + nla_total_size(sizeof(u32)) /* IFLA_LINK */ |
| + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ |
| + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ |
| + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ |
| + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ |
| + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ |
| } |
| |
| static int rtnl_bridge_notify(struct net_device *dev) |
| { |
| struct net *net = dev_net(dev); |
| struct sk_buff *skb; |
| int err = -EOPNOTSUPP; |
| |
| if (!dev->netdev_ops->ndo_bridge_getlink) |
| return 0; |
| |
| skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); |
| if (!skb) { |
| err = -ENOMEM; |
| goto errout; |
| } |
| |
| err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); |
| if (err < 0) |
| goto errout; |
| |
| /* Notification info is only filled for bridge ports, not the bridge |
| * device itself. Therefore, a zero notification length is valid and |
| * should not result in an error. |
| */ |
| 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 netlink_ext_ack *extack) |
| { |
| struct net *net = sock_net(skb->sk); |
| struct ifinfomsg *ifm; |
| struct net_device *dev; |
| struct nlattr *br_spec, *attr, *br_flags_attr = NULL; |
| int rem, err = -EOPNOTSUPP; |
| u16 flags = 0; |
| |
| 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) { |
| NL_SET_ERR_MSG(extack, "unknown ifindex"); |
| 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 && !br_flags_attr) { |
| if (nla_len(attr) < sizeof(flags)) |
| return -EINVAL; |
| |
| br_flags_attr = attr; |
| flags = nla_get_u16(attr); |
| } |
| |
| if (nla_type(attr) == IFLA_BRIDGE_MODE) { |
| if (nla_len(attr) < sizeof(u16)) |
| return -EINVAL; |
| } |
| } |
| } |
| |
| 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, |
| extack); |
| 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, |
| extack); |
| if (!err) { |
| flags &= ~BRIDGE_FLAGS_SELF; |
| |
| /* Generate event to notify upper layer of bridge |
| * change |
| */ |
| err = rtnl_bridge_notify(dev); |
| } |
| } |
| |
| if (br_flags_attr) |
| memcpy(nla_data(br_flags_attr), &flags, sizeof(flags)); |
| out: |
| return err; |
| } |
| |
| static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| 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) { |
| NL_SET_ERR_MSG(extack, "unknown ifindex"); |
| return -ENODEV; |
| } |
| |
| br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); |
| if (br_spec) { |
| nla_for_each_nested_type(attr, IFLA_BRIDGE_FLAGS, br_spec, |
| rem) { |
| 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 bool |
| rtnl_offload_xstats_have_ndo(const struct net_device *dev, int attr_id) |
| { |
| return dev->netdev_ops && |
| dev->netdev_ops->ndo_has_offload_stats && |
| dev->netdev_ops->ndo_get_offload_stats && |
| dev->netdev_ops->ndo_has_offload_stats(dev, attr_id); |
| } |
| |
| static unsigned int |
| rtnl_offload_xstats_get_size_ndo(const struct net_device *dev, int attr_id) |
| { |
| return rtnl_offload_xstats_have_ndo(dev, attr_id) ? |
| sizeof(struct rtnl_link_stats64) : 0; |
| } |
| |
| static int |
| rtnl_offload_xstats_fill_ndo(struct net_device *dev, int attr_id, |
| struct sk_buff *skb) |
| { |
| unsigned int size = rtnl_offload_xstats_get_size_ndo(dev, attr_id); |
| struct nlattr *attr = NULL; |
| void *attr_data; |
| int err; |
| |
| if (!size) |
| return -ENODATA; |
| |
| attr = nla_reserve_64bit(skb, attr_id, size, |
| IFLA_OFFLOAD_XSTATS_UNSPEC); |
| if (!attr) |
| return -EMSGSIZE; |
| |
| attr_data = nla_data(attr); |
| memset(attr_data, 0, size); |
| |
| err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, attr_data); |
| if (err) |
| return err; |
| |
| return 0; |
| } |
| |
| static unsigned int |
| rtnl_offload_xstats_get_size_stats(const struct net_device *dev, |
| enum netdev_offload_xstats_type type) |
| { |
| bool enabled = netdev_offload_xstats_enabled(dev, type); |
| |
| return enabled ? sizeof(struct rtnl_hw_stats64) : 0; |
| } |
| |
| struct rtnl_offload_xstats_request_used { |
| bool request; |
| bool used; |
| }; |
| |
| static int |
| rtnl_offload_xstats_get_stats(struct net_device *dev, |
| enum netdev_offload_xstats_type type, |
| struct rtnl_offload_xstats_request_used *ru, |
| struct rtnl_hw_stats64 *stats, |
| struct netlink_ext_ack *extack) |
| { |
| bool request; |
| bool used; |
| int err; |
| |
| request = netdev_offload_xstats_enabled(dev, type); |
| if (!request) { |
| used = false; |
| goto out; |
| } |
| |
| err = netdev_offload_xstats_get(dev, type, stats, &used, extack); |
| if (err) |
| return err; |
| |
| out: |
| if (ru) { |
| ru->request = request; |
| ru->used = used; |
| } |
| return 0; |
| } |
| |
| static int |
| rtnl_offload_xstats_fill_hw_s_info_one(struct sk_buff *skb, int attr_id, |
| struct rtnl_offload_xstats_request_used *ru) |
| { |
| struct nlattr *nest; |
| |
| nest = nla_nest_start(skb, attr_id); |
| if (!nest) |
| return -EMSGSIZE; |
| |
| if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST, ru->request)) |
| goto nla_put_failure; |
| |
| if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED, ru->used)) |
| goto nla_put_failure; |
| |
| nla_nest_end(skb, nest); |
| return 0; |
| |
| nla_put_failure: |
| nla_nest_cancel(skb, nest); |
| return -EMSGSIZE; |
| } |
| |
| static int |
| rtnl_offload_xstats_fill_hw_s_info(struct sk_buff *skb, struct net_device *dev, |
| struct netlink_ext_ack *extack) |
| { |
| enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3; |
| struct rtnl_offload_xstats_request_used ru_l3; |
| struct nlattr *nest; |
| int err; |
| |
| err = rtnl_offload_xstats_get_stats(dev, t_l3, &ru_l3, NULL, extack); |
| if (err) |
| return err; |
| |
| nest = nla_nest_start(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO); |
| if (!nest) |
| return -EMSGSIZE; |
| |
| if (rtnl_offload_xstats_fill_hw_s_info_one(skb, |
| IFLA_OFFLOAD_XSTATS_L3_STATS, |
| &ru_l3)) |
| goto nla_put_failure; |
| |
| nla_nest_end(skb, nest); |
| return 0; |
| |
| nla_put_failure: |
| nla_nest_cancel(skb, nest); |
| return -EMSGSIZE; |
| } |
| |
| static int rtnl_offload_xstats_fill(struct sk_buff *skb, struct net_device *dev, |
| int *prividx, u32 off_filter_mask, |
| struct netlink_ext_ack *extack) |
| { |
| enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3; |
| int attr_id_hw_s_info = IFLA_OFFLOAD_XSTATS_HW_S_INFO; |
| int attr_id_l3_stats = IFLA_OFFLOAD_XSTATS_L3_STATS; |
| int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT; |
| bool have_data = false; |
| int err; |
| |
| if (*prividx <= attr_id_cpu_hit && |
| (off_filter_mask & |
| IFLA_STATS_FILTER_BIT(attr_id_cpu_hit))) { |
| err = rtnl_offload_xstats_fill_ndo(dev, attr_id_cpu_hit, skb); |
| if (!err) { |
| have_data = true; |
| } else if (err != -ENODATA) { |
| *prividx = attr_id_cpu_hit; |
| return err; |
| } |
| } |
| |
| if (*prividx <= attr_id_hw_s_info && |
| (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_hw_s_info))) { |
| *prividx = attr_id_hw_s_info; |
| |
| err = rtnl_offload_xstats_fill_hw_s_info(skb, dev, extack); |
| if (err) |
| return err; |
| |
| have_data = true; |
| *prividx = 0; |
| } |
| |
| if (*prividx <= attr_id_l3_stats && |
| (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_l3_stats))) { |
| unsigned int size_l3; |
| struct nlattr *attr; |
| |
| *prividx = attr_id_l3_stats; |
| |
| size_l3 = rtnl_offload_xstats_get_size_stats(dev, t_l3); |
| if (!size_l3) |
| goto skip_l3_stats; |
| attr = nla_reserve_64bit(skb, attr_id_l3_stats, size_l3, |
| IFLA_OFFLOAD_XSTATS_UNSPEC); |
| if (!attr) |
| return -EMSGSIZE; |
| |
| err = rtnl_offload_xstats_get_stats(dev, t_l3, NULL, |
| nla_data(attr), extack); |
| if (err) |
| return err; |
| |
| have_data = true; |
| skip_l3_stats: |
| *prividx = 0; |
| } |
| |
| if (!have_data) |
| return -ENODATA; |
| |
| *prividx = 0; |
| return 0; |
| } |
| |
| static unsigned int |
| rtnl_offload_xstats_get_size_hw_s_info_one(const struct net_device *dev, |
| enum netdev_offload_xstats_type type) |
| { |
| return nla_total_size(0) + |
| /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST */ |
| nla_total_size(sizeof(u8)) + |
| /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED */ |
| nla_total_size(sizeof(u8)) + |
| 0; |
| } |
| |
| static unsigned int |
| rtnl_offload_xstats_get_size_hw_s_info(const struct net_device *dev) |
| { |
| enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3; |
| |
| return nla_total_size(0) + |
| /* IFLA_OFFLOAD_XSTATS_L3_STATS */ |
| rtnl_offload_xstats_get_size_hw_s_info_one(dev, t_l3) + |
| 0; |
| } |
| |
| static int rtnl_offload_xstats_get_size(const struct net_device *dev, |
| u32 off_filter_mask) |
| { |
| enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3; |
| int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT; |
| int nla_size = 0; |
| int size; |
| |
| if (off_filter_mask & |
| IFLA_STATS_FILTER_BIT(attr_id_cpu_hit)) { |
| size = rtnl_offload_xstats_get_size_ndo(dev, attr_id_cpu_hit); |
| nla_size += nla_total_size_64bit(size); |
| } |
| |
| if (off_filter_mask & |
| IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO)) |
| nla_size += rtnl_offload_xstats_get_size_hw_s_info(dev); |
| |
| if (off_filter_mask & |
| IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_L3_STATS)) { |
| size = rtnl_offload_xstats_get_size_stats(dev, t_l3); |
| nla_size += nla_total_size_64bit(size); |
| } |
| |
| if (nla_size != 0) |
| nla_size += nla_total_size(0); |
| |
| return nla_size; |
| } |
| |
| struct rtnl_stats_dump_filters { |
| /* mask[0] filters outer attributes. Then individual nests have their |
| * filtering mask at the index of the nested attribute. |
| */ |
| u32 mask[IFLA_STATS_MAX + 1]; |
| }; |
| |
| static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, |
| int type, u32 pid, u32 seq, u32 change, |
| unsigned int flags, |
| const struct rtnl_stats_dump_filters *filters, |
| int *idxattr, int *prividx, |
| struct netlink_ext_ack *extack) |
| { |
| unsigned int filter_mask = filters->mask[0]; |
| struct if_stats_msg *ifsm; |
| struct nlmsghdr *nlh; |
| struct nlattr *attr; |
| int s_prividx = *prividx; |
| int err; |
| |
| ASSERT_RTNL(); |
| |
| nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); |
| if (!nlh) |
| return -EMSGSIZE; |
| |
| ifsm = nlmsg_data(nlh); |
| ifsm->family = PF_UNSPEC; |
| ifsm->pad1 = 0; |
| ifsm->pad2 = 0; |
| 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) { |
| err = -EMSGSIZE; |
| 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) { |
| *idxattr = IFLA_STATS_LINK_XSTATS; |
| attr = nla_nest_start_noflag(skb, |
| IFLA_STATS_LINK_XSTATS); |
| if (!attr) { |
| err = -EMSGSIZE; |
| 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) { |
| *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; |
| attr = nla_nest_start_noflag(skb, |
| IFLA_STATS_LINK_XSTATS_SLAVE); |
| if (!attr) { |
| err = -EMSGSIZE; |
| 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_OFFLOAD_XSTATS, |
| *idxattr)) { |
| u32 off_filter_mask; |
| |
| off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS]; |
| *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; |
| attr = nla_nest_start_noflag(skb, |
| IFLA_STATS_LINK_OFFLOAD_XSTATS); |
| if (!attr) { |
| err = -EMSGSIZE; |
| goto nla_put_failure; |
| } |
| |
| err = rtnl_offload_xstats_fill(skb, dev, prividx, |
| off_filter_mask, extack); |
| if (err == -ENODATA) |
| nla_nest_cancel(skb, attr); |
| else |
| nla_nest_end(skb, attr); |
| |
| if (err && err != -ENODATA) |
| goto nla_put_failure; |
| *idxattr = 0; |
| } |
| |
| if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { |
| struct rtnl_af_ops *af_ops; |
| |
| *idxattr = IFLA_STATS_AF_SPEC; |
| attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC); |
| if (!attr) { |
| err = -EMSGSIZE; |
| goto nla_put_failure; |
| } |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { |
| if (af_ops->fill_stats_af) { |
| struct nlattr *af; |
| |
| af = nla_nest_start_noflag(skb, |
| af_ops->family); |
| if (!af) { |
| rcu_read_unlock(); |
| err = -EMSGSIZE; |
| goto nla_put_failure; |
| } |
| err = af_ops->fill_stats_af(skb, dev); |
| |
| if (err == -ENODATA) { |
| nla_nest_cancel(skb, af); |
| } else if (err < 0) { |
| rcu_read_unlock(); |
| goto nla_put_failure; |
| } |
| |
| nla_nest_end(skb, af); |
| } |
| } |
| rcu_read_unlock(); |
| |
| nla_nest_end(skb, attr); |
| |
| *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 err; |
| } |
| |
| static size_t if_nlmsg_stats_size(const struct net_device *dev, |
| const struct rtnl_stats_dump_filters *filters) |
| { |
| size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg)); |
| unsigned int filter_mask = filters->mask[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); |
| } |
| } |
| |
| if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) { |
| u32 off_filter_mask; |
| |
| off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS]; |
| size += rtnl_offload_xstats_get_size(dev, off_filter_mask); |
| } |
| |
| if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { |
| struct rtnl_af_ops *af_ops; |
| |
| /* for IFLA_STATS_AF_SPEC */ |
| size += nla_total_size(0); |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { |
| if (af_ops->get_stats_af_size) { |
| size += nla_total_size( |
| af_ops->get_stats_af_size(dev)); |
| |
| /* for AF_* */ |
| size += nla_total_size(0); |
| } |
| } |
| rcu_read_unlock(); |
| } |
| |
| return size; |
| } |
| |
| #define RTNL_STATS_OFFLOAD_XSTATS_VALID ((1 << __IFLA_OFFLOAD_XSTATS_MAX) - 1) |
| |
| static const struct nla_policy |
| rtnl_stats_get_policy_filters[IFLA_STATS_MAX + 1] = { |
| [IFLA_STATS_LINK_OFFLOAD_XSTATS] = |
| NLA_POLICY_MASK(NLA_U32, RTNL_STATS_OFFLOAD_XSTATS_VALID), |
| }; |
| |
| static const struct nla_policy |
| rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = { |
| [IFLA_STATS_GET_FILTERS] = |
| NLA_POLICY_NESTED(rtnl_stats_get_policy_filters), |
| }; |
| |
| static const struct nla_policy |
| ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = { |
| [IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS] = NLA_POLICY_MAX(NLA_U8, 1), |
| }; |
| |
| static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters, |
| struct rtnl_stats_dump_filters *filters, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[IFLA_STATS_MAX + 1]; |
| int err; |
| int at; |
| |
| err = nla_parse_nested(tb, IFLA_STATS_MAX, ifla_filters, |
| rtnl_stats_get_policy_filters, extack); |
| if (err < 0) |
| return err; |
| |
| for (at = 1; at <= IFLA_STATS_MAX; at++) { |
| if (tb[at]) { |
| if (!(filters->mask[0] & IFLA_STATS_FILTER_BIT(at))) { |
| NL_SET_ERR_MSG(extack, "Filtered attribute not enabled in filter_mask"); |
| return -EINVAL; |
| } |
| filters->mask[at] = nla_get_u32(tb[at]); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int rtnl_stats_get_parse(const struct nlmsghdr *nlh, |
| u32 filter_mask, |
| struct rtnl_stats_dump_filters *filters, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1]; |
| int err; |
| int i; |
| |
| filters->mask[0] = filter_mask; |
| for (i = 1; i < ARRAY_SIZE(filters->mask); i++) |
| filters->mask[i] = -1U; |
| |
| err = nlmsg_parse(nlh, sizeof(struct if_stats_msg), tb, |
| IFLA_STATS_GETSET_MAX, rtnl_stats_get_policy, extack); |
| if (err < 0) |
| return err; |
| |
| if (tb[IFLA_STATS_GET_FILTERS]) { |
| err = rtnl_stats_get_parse_filters(tb[IFLA_STATS_GET_FILTERS], |
| filters, extack); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check, |
| bool is_dump, struct netlink_ext_ack *extack) |
| { |
| struct if_stats_msg *ifsm; |
| |
| if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) { |
| NL_SET_ERR_MSG(extack, "Invalid header for stats dump"); |
| return -EINVAL; |
| } |
| |
| if (!strict_check) |
| return 0; |
| |
| ifsm = nlmsg_data(nlh); |
| |
| /* only requests using strict checks can pass data to influence |
| * the dump. The legacy exception is filter_mask. |
| */ |
| if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) { |
| NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request"); |
| return -EINVAL; |
| } |
| if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) { |
| NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct rtnl_stats_dump_filters filters; |
| 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; |
| int err; |
| |
| err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb), |
| false, extack); |
| if (err) |
| return err; |
| |
| ifsm = nlmsg_data(nlh); |
| if (ifsm->ifindex > 0) |
| dev = __dev_get_by_index(net, ifsm->ifindex); |
| else |
| return -EINVAL; |
| |
| if (!dev) |
| return -ENODEV; |
| |
| if (!ifsm->filter_mask) { |
| NL_SET_ERR_MSG(extack, "Filter mask must be set for stats get"); |
| return -EINVAL; |
| } |
| |
| err = rtnl_stats_get_parse(nlh, ifsm->filter_mask, &filters, extack); |
| if (err) |
| return err; |
| |
| nskb = nlmsg_new(if_nlmsg_stats_size(dev, &filters), GFP_KERNEL); |
| if (!nskb) |
| return -ENOBUFS; |
| |
| err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, |
| NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, |
| 0, &filters, &idxattr, &prividx, extack); |
| 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) |
| { |
| struct netlink_ext_ack *extack = cb->extack; |
| struct rtnl_stats_dump_filters filters; |
| struct net *net = sock_net(skb->sk); |
| unsigned int flags = NLM_F_MULTI; |
| struct if_stats_msg *ifsm; |
| struct { |
| unsigned long ifindex; |
| int idxattr; |
| int prividx; |
| } *ctx = (void *)cb->ctx; |
| struct net_device *dev; |
| int err; |
| |
| cb->seq = net->dev_base_seq; |
| |
| err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack); |
| if (err) |
| return err; |
| |
| ifsm = nlmsg_data(cb->nlh); |
| if (!ifsm->filter_mask) { |
| NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump"); |
| return -EINVAL; |
| } |
| |
| err = rtnl_stats_get_parse(cb->nlh, ifsm->filter_mask, &filters, |
| extack); |
| if (err) |
| return err; |
| |
| for_each_netdev_dump(net, dev, ctx->ifindex) { |
| err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, |
| NETLINK_CB(cb->skb).portid, |
| cb->nlh->nlmsg_seq, 0, |
| flags, &filters, |
| &ctx->idxattr, &ctx->prividx, |
| extack); |
| /* If we ran out of room on the first message, |
| * we're in trouble. |
| */ |
| WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); |
| |
| if (err < 0) |
| break; |
| ctx->prividx = 0; |
| ctx->idxattr = 0; |
| nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
| } |
| |
| return err; |
| } |
| |
| void rtnl_offload_xstats_notify(struct net_device *dev) |
| { |
| struct rtnl_stats_dump_filters response_filters = {}; |
| struct net *net = dev_net(dev); |
| int idxattr = 0, prividx = 0; |
| struct sk_buff *skb; |
| int err = -ENOBUFS; |
| |
| ASSERT_RTNL(); |
| |
| response_filters.mask[0] |= |
| IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS); |
| response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |= |
| IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO); |
| |
| skb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters), |
| GFP_KERNEL); |
| if (!skb) |
| goto errout; |
| |
| err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 0, 0, 0, 0, |
| &response_filters, &idxattr, &prividx, NULL); |
| if (err < 0) { |
| kfree_skb(skb); |
| goto errout; |
| } |
| |
| rtnl_notify(skb, net, 0, RTNLGRP_STATS, NULL, GFP_KERNEL); |
| return; |
| |
| errout: |
| rtnl_set_sk_err(net, RTNLGRP_STATS, err); |
| } |
| EXPORT_SYMBOL(rtnl_offload_xstats_notify); |
| |
| static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3; |
| struct rtnl_stats_dump_filters response_filters = {}; |
| struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1]; |
| struct net *net = sock_net(skb->sk); |
| struct net_device *dev = NULL; |
| struct if_stats_msg *ifsm; |
| bool notify = false; |
| int err; |
| |
| err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb), |
| false, extack); |
| if (err) |
| return err; |
| |
| ifsm = nlmsg_data(nlh); |
| if (ifsm->family != AF_UNSPEC) { |
| NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC"); |
| return -EINVAL; |
| } |
| |
| if (ifsm->ifindex > 0) |
| dev = __dev_get_by_index(net, ifsm->ifindex); |
| else |
| return -EINVAL; |
| |
| if (!dev) |
| return -ENODEV; |
| |
| if (ifsm->filter_mask) { |
| NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set"); |
| return -EINVAL; |
| } |
| |
| err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX, |
| ifla_stats_set_policy, extack); |
| if (err < 0) |
| return err; |
| |
| if (tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]) { |
| u8 req = nla_get_u8(tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]); |
| |
| if (req) |
| err = netdev_offload_xstats_enable(dev, t_l3, extack); |
| else |
| err = netdev_offload_xstats_disable(dev, t_l3); |
| |
| if (!err) |
| notify = true; |
| else if (err != -EALREADY) |
| return err; |
| |
| response_filters.mask[0] |= |
| IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS); |
| response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |= |
| IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO); |
| } |
| |
| if (notify) |
| rtnl_offload_xstats_notify(dev); |
| |
| return 0; |
| } |
| |
| static int rtnl_mdb_valid_dump_req(const struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct br_port_msg *bpm; |
| |
| if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*bpm))) { |
| NL_SET_ERR_MSG(extack, "Invalid header for mdb dump request"); |
| return -EINVAL; |
| } |
| |
| bpm = nlmsg_data(nlh); |
| if (bpm->ifindex) { |
| NL_SET_ERR_MSG(extack, "Filtering by device index is not supported for mdb dump request"); |
| return -EINVAL; |
| } |
| if (nlmsg_attrlen(nlh, sizeof(*bpm))) { |
| NL_SET_ERR_MSG(extack, "Invalid data after header in mdb dump request"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| struct rtnl_mdb_dump_ctx { |
| long idx; |
| }; |
| |
| static int rtnl_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| { |
| struct rtnl_mdb_dump_ctx *ctx = (void *)cb->ctx; |
| struct net *net = sock_net(skb->sk); |
| struct net_device *dev; |
| int idx, s_idx; |
| int err; |
| |
| NL_ASSERT_CTX_FITS(struct rtnl_mdb_dump_ctx); |
| |
| if (cb->strict_check) { |
| err = rtnl_mdb_valid_dump_req(cb->nlh, cb->extack); |
| if (err) |
| return err; |
| } |
| |
| s_idx = ctx->idx; |
| idx = 0; |
| |
| for_each_netdev(net, dev) { |
| if (idx < s_idx) |
| goto skip; |
| if (!dev->netdev_ops->ndo_mdb_dump) |
| goto skip; |
| |
| err = dev->netdev_ops->ndo_mdb_dump(dev, skb, cb); |
| if (err == -EMSGSIZE) |
| goto out; |
| /* Moving on to next device, reset markers and sequence |
| * counters since they are all maintained per-device. |
| */ |
| memset(cb->ctx, 0, sizeof(cb->ctx)); |
| cb->prev_seq = 0; |
| cb->seq = 0; |
| skip: |
| idx++; |
| } |
| |
| out: |
| ctx->idx = idx; |
| return skb->len; |
| } |
| |
| static int rtnl_validate_mdb_entry_get(const struct nlattr *attr, |
| struct netlink_ext_ack *extack) |
| { |
| struct br_mdb_entry *entry = nla_data(attr); |
| |
| if (nla_len(attr) != sizeof(struct br_mdb_entry)) { |
| NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length"); |
| return -EINVAL; |
| } |
| |
| if (entry->ifindex) { |
| NL_SET_ERR_MSG(extack, "Entry ifindex cannot be specified"); |
| return -EINVAL; |
| } |
| |
| if (entry->state) { |
| NL_SET_ERR_MSG(extack, "Entry state cannot be specified"); |
| return -EINVAL; |
| } |
| |
| if (entry->flags) { |
| NL_SET_ERR_MSG(extack, "Entry flags cannot be specified"); |
| return -EINVAL; |
| } |
| |
| if (entry->vid >= VLAN_VID_MASK) { |
| NL_SET_ERR_MSG(extack, "Invalid entry VLAN id"); |
| return -EINVAL; |
| } |
| |
| if (entry->addr.proto != htons(ETH_P_IP) && |
| entry->addr.proto != htons(ETH_P_IPV6) && |
| entry->addr.proto != 0) { |
| NL_SET_ERR_MSG(extack, "Unknown entry protocol"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static const struct nla_policy mdba_get_policy[MDBA_GET_ENTRY_MAX + 1] = { |
| [MDBA_GET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY, |
| rtnl_validate_mdb_entry_get, |
| sizeof(struct br_mdb_entry)), |
| [MDBA_GET_ENTRY_ATTRS] = { .type = NLA_NESTED }, |
| }; |
| |
| static int rtnl_mdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[MDBA_GET_ENTRY_MAX + 1]; |
| struct net *net = sock_net(in_skb->sk); |
| struct br_port_msg *bpm; |
| struct net_device *dev; |
| int err; |
| |
| err = nlmsg_parse(nlh, sizeof(struct br_port_msg), tb, |
| MDBA_GET_ENTRY_MAX, mdba_get_policy, extack); |
| if (err) |
| return err; |
| |
| bpm = nlmsg_data(nlh); |
| if (!bpm->ifindex) { |
| NL_SET_ERR_MSG(extack, "Invalid ifindex"); |
| return -EINVAL; |
| } |
| |
| dev = __dev_get_by_index(net, bpm->ifindex); |
| if (!dev) { |
| NL_SET_ERR_MSG(extack, "Device doesn't exist"); |
| return -ENODEV; |
| } |
| |
| if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_GET_ENTRY)) { |
| NL_SET_ERR_MSG(extack, "Missing MDBA_GET_ENTRY attribute"); |
| return -EINVAL; |
| } |
| |
| if (!dev->netdev_ops->ndo_mdb_get) { |
| NL_SET_ERR_MSG(extack, "Device does not support MDB operations"); |
| return -EOPNOTSUPP; |
| } |
| |
| return dev->netdev_ops->ndo_mdb_get(dev, tb, NETLINK_CB(in_skb).portid, |
| nlh->nlmsg_seq, extack); |
| } |
| |
| static int rtnl_validate_mdb_entry(const struct nlattr *attr, |
| struct netlink_ext_ack *extack) |
| { |
| struct br_mdb_entry *entry = nla_data(attr); |
| |
| if (nla_len(attr) != sizeof(struct br_mdb_entry)) { |
| NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length"); |
| return -EINVAL; |
| } |
| |
| if (entry->ifindex == 0) { |
| NL_SET_ERR_MSG(extack, "Zero entry ifindex is not allowed"); |
| return -EINVAL; |
| } |
| |
| if (entry->addr.proto == htons(ETH_P_IP)) { |
| if (!ipv4_is_multicast(entry->addr.u.ip4) && |
| !ipv4_is_zeronet(entry->addr.u.ip4)) { |
| NL_SET_ERR_MSG(extack, "IPv4 entry group address is not multicast or 0.0.0.0"); |
| return -EINVAL; |
| } |
| if (ipv4_is_local_multicast(entry->addr.u.ip4)) { |
| NL_SET_ERR_MSG(extack, "IPv4 entry group address is local multicast"); |
| return -EINVAL; |
| } |
| #if IS_ENABLED(CONFIG_IPV6) |
| } else if (entry->addr.proto == htons(ETH_P_IPV6)) { |
| if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) { |
| NL_SET_ERR_MSG(extack, "IPv6 entry group address is link-local all nodes"); |
| return -EINVAL; |
| } |
| #endif |
| } else if (entry->addr.proto == 0) { |
| /* L2 mdb */ |
| if (!is_multicast_ether_addr(entry->addr.u.mac_addr)) { |
| NL_SET_ERR_MSG(extack, "L2 entry group is not multicast"); |
| return -EINVAL; |
| } |
| } else { |
| NL_SET_ERR_MSG(extack, "Unknown entry protocol"); |
| return -EINVAL; |
| } |
| |
| if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) { |
| NL_SET_ERR_MSG(extack, "Unknown entry state"); |
| return -EINVAL; |
| } |
| if (entry->vid >= VLAN_VID_MASK) { |
| NL_SET_ERR_MSG(extack, "Invalid entry VLAN id"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static const struct nla_policy mdba_policy[MDBA_SET_ENTRY_MAX + 1] = { |
| [MDBA_SET_ENTRY_UNSPEC] = { .strict_start_type = MDBA_SET_ENTRY_ATTRS + 1 }, |
| [MDBA_SET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY, |
| rtnl_validate_mdb_entry, |
| sizeof(struct br_mdb_entry)), |
| [MDBA_SET_ENTRY_ATTRS] = { .type = NLA_NESTED }, |
| }; |
| |
| static int rtnl_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[MDBA_SET_ENTRY_MAX + 1]; |
| struct net *net = sock_net(skb->sk); |
| struct br_port_msg *bpm; |
| struct net_device *dev; |
| int err; |
| |
| err = nlmsg_parse_deprecated(nlh, sizeof(*bpm), tb, |
| MDBA_SET_ENTRY_MAX, mdba_policy, extack); |
| if (err) |
| return err; |
| |
| bpm = nlmsg_data(nlh); |
| if (!bpm->ifindex) { |
| NL_SET_ERR_MSG(extack, "Invalid ifindex"); |
| return -EINVAL; |
| } |
| |
| dev = __dev_get_by_index(net, bpm->ifindex); |
| if (!dev) { |
| NL_SET_ERR_MSG(extack, "Device doesn't exist"); |
| return -ENODEV; |
| } |
| |
| if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_SET_ENTRY)) { |
| NL_SET_ERR_MSG(extack, "Missing MDBA_SET_ENTRY attribute"); |
| return -EINVAL; |
| } |
| |
| if (!dev->netdev_ops->ndo_mdb_add) { |
| NL_SET_ERR_MSG(extack, "Device does not support MDB operations"); |
| return -EOPNOTSUPP; |
| } |
| |
| return dev->netdev_ops->ndo_mdb_add(dev, tb, nlh->nlmsg_flags, extack); |
| } |
| |
| static int rtnl_validate_mdb_entry_del_bulk(const struct nlattr *attr, |
| struct netlink_ext_ack *extack) |
| { |
| struct br_mdb_entry *entry = nla_data(attr); |
| struct br_mdb_entry zero_entry = {}; |
| |
| if (nla_len(attr) != sizeof(struct br_mdb_entry)) { |
| NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length"); |
| return -EINVAL; |
| } |
| |
| if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) { |
| NL_SET_ERR_MSG(extack, "Unknown entry state"); |
| return -EINVAL; |
| } |
| |
| if (entry->flags) { |
| NL_SET_ERR_MSG(extack, "Entry flags cannot be set"); |
| return -EINVAL; |
| } |
| |
| if (entry->vid >= VLAN_N_VID - 1) { |
| NL_SET_ERR_MSG(extack, "Invalid entry VLAN id"); |
| return -EINVAL; |
| } |
| |
| if (memcmp(&entry->addr, &zero_entry.addr, sizeof(entry->addr))) { |
| NL_SET_ERR_MSG(extack, "Entry address cannot be set"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static const struct nla_policy mdba_del_bulk_policy[MDBA_SET_ENTRY_MAX + 1] = { |
| [MDBA_SET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY, |
| rtnl_validate_mdb_entry_del_bulk, |
| sizeof(struct br_mdb_entry)), |
| [MDBA_SET_ENTRY_ATTRS] = { .type = NLA_NESTED }, |
| }; |
| |
| static int rtnl_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK); |
| struct nlattr *tb[MDBA_SET_ENTRY_MAX + 1]; |
| struct net *net = sock_net(skb->sk); |
| struct br_port_msg *bpm; |
| struct net_device *dev; |
| int err; |
| |
| if (!del_bulk) |
| err = nlmsg_parse_deprecated(nlh, sizeof(*bpm), tb, |
| MDBA_SET_ENTRY_MAX, mdba_policy, |
| extack); |
| else |
| err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, |
| mdba_del_bulk_policy, extack); |
| if (err) |
| return err; |
| |
| bpm = nlmsg_data(nlh); |
| if (!bpm->ifindex) { |
| NL_SET_ERR_MSG(extack, "Invalid ifindex"); |
| return -EINVAL; |
| } |
| |
| dev = __dev_get_by_index(net, bpm->ifindex); |
| if (!dev) { |
| NL_SET_ERR_MSG(extack, "Device doesn't exist"); |
| return -ENODEV; |
| } |
| |
| if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_SET_ENTRY)) { |
| NL_SET_ERR_MSG(extack, "Missing MDBA_SET_ENTRY attribute"); |
| return -EINVAL; |
| } |
| |
| if (del_bulk) { |
| if (!dev->netdev_ops->ndo_mdb_del_bulk) { |
| NL_SET_ERR_MSG(extack, "Device does not support MDB bulk deletion"); |
| return -EOPNOTSUPP; |
| } |
| return dev->netdev_ops->ndo_mdb_del_bulk(dev, tb, extack); |
| } |
| |
| if (!dev->netdev_ops->ndo_mdb_del) { |
| NL_SET_ERR_MSG(extack, "Device does not support MDB operations"); |
| return -EOPNOTSUPP; |
| } |
| |
| return dev->netdev_ops->ndo_mdb_del(dev, tb, extack); |
| } |
| |
| /* Process one rtnetlink message. */ |
| |
| static int rtnl_dumpit(struct sk_buff *skb, struct netlink_callback *cb) |
| { |
| const bool needs_lock = !(cb->flags & RTNL_FLAG_DUMP_UNLOCKED); |
| rtnl_dumpit_func dumpit = cb->data; |
| int err; |
| |
| /* Previous iteration have already finished, avoid calling->dumpit() |
| * again, it may not expect to be called after it reached the end. |
| */ |
| if (!dumpit) |
| return 0; |
| |
| if (needs_lock) |
| rtnl_lock(); |
| err = dumpit(skb, cb); |
| if (needs_lock) |
| rtnl_unlock(); |
| |
| /* Old dump handlers used to send NLM_DONE as in a separate recvmsg(). |
| * Some applications which parse netlink manually depend on this. |
| */ |
| if (cb->flags & RTNL_FLAG_DUMP_SPLIT_NLM_DONE) { |
| if (err < 0 && err != -EMSGSIZE) |
| return err; |
| if (!err) |
| cb->data = NULL; |
| |
| return skb->len; |
| } |
| return err; |
| } |
| |
| static int rtnetlink_dump_start(struct sock *ssk, struct sk_buff *skb, |
| const struct nlmsghdr *nlh, |
| struct netlink_dump_control *control) |
| { |
| if (control->flags & RTNL_FLAG_DUMP_SPLIT_NLM_DONE || |
| !(control->flags & RTNL_FLAG_DUMP_UNLOCKED)) { |
| WARN_ON(control->data); |
| control->data = control->dump; |
| control->dump = rtnl_dumpit; |
| } |
| |
| return netlink_dump_start(ssk, skb, nlh, control); |
| } |
| |
| static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct net *net = sock_net(skb->sk); |
| struct rtnl_link *link; |
| enum rtnl_kinds kind; |
| struct module *owner; |
| int err = -EOPNOTSUPP; |
| rtnl_doit_func doit; |
| unsigned int flags; |
| int family; |
| int type; |
| |
| 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 = rtnl_msgtype_kind(type); |
| |
| if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN)) |
| return -EPERM; |
| |
| rcu_read_lock(); |
| if (kind == RTNL_KIND_GET && (nlh->nlmsg_flags & NLM_F_DUMP)) { |
| struct sock *rtnl; |
| rtnl_dumpit_func dumpit; |
| u32 min_dump_alloc = 0; |
| |
| link = rtnl_get_link(family, type); |
| if (!link || !link->dumpit) { |
| family = PF_UNSPEC; |
| link = rtnl_get_link(family, type); |
| if (!link || !link->dumpit) |
| goto err_unlock; |
| } |
| owner = link->owner; |
| dumpit = link->dumpit; |
| flags = link->flags; |
| |
| if (type == RTM_GETLINK - RTM_BASE) |
| min_dump_alloc = rtnl_calcit(skb, nlh); |
| |
| err = 0; |
| /* need to do this before rcu_read_unlock() */ |
| if (!try_module_get(owner)) |
| err = -EPROTONOSUPPORT; |
| |
| rcu_read_unlock(); |
| |
| rtnl = net->rtnl; |
| if (err == 0) { |
| struct netlink_dump_control c = { |
| .dump = dumpit, |
| .min_dump_alloc = min_dump_alloc, |
| .module = owner, |
| .flags = flags, |
| }; |
| err = rtnetlink_dump_start(rtnl, skb, nlh, &c); |
| /* netlink_dump_start() will keep a reference on |
| * module if dump is still in progress. |
| */ |
| module_put(owner); |
| } |
| return err; |
| } |
| |
| link = rtnl_get_link(family, type); |
| if (!link || !link->doit) { |
| family = PF_UNSPEC; |
| link = rtnl_get_link(PF_UNSPEC, type); |
| if (!link || !link->doit) |
| goto out_unlock; |
| } |
| |
| owner = link->owner; |
| if (!try_module_get(owner)) { |
| err = -EPROTONOSUPPORT; |
| goto out_unlock; |
| } |
| |
| flags = link->flags; |
| if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) && |
| !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) { |
| NL_SET_ERR_MSG(extack, "Bulk delete is not supported"); |
| module_put(owner); |
| goto err_unlock; |
| } |
| |
| if (flags & RTNL_FLAG_DOIT_UNLOCKED) { |
| doit = link->doit; |
| rcu_read_unlock(); |
| if (doit) |
| err = doit(skb, nlh, extack); |
| module_put(owner); |
| return err; |
| } |
| rcu_read_unlock(); |
| |
| rtnl_lock(); |
| link = rtnl_get_link(family, type); |
| if (link && link->doit) |
| err = link->doit(skb, nlh, extack); |
| rtnl_unlock(); |
| |
| module_put(owner); |
| |
| return err; |
| |
| out_unlock: |
| rcu_read_unlock(); |
| return err; |
| |
| err_unlock: |
| rcu_read_unlock(); |
| return -EOPNOTSUPP; |
| } |
| |
| static void rtnetlink_rcv(struct sk_buff *skb) |
| { |
| netlink_rcv_skb(skb, &rtnetlink_rcv_msg); |
| } |
| |
| static int rtnetlink_bind(struct net *net, int group) |
| { |
| switch (group) { |
| case RTNLGRP_IPV4_MROUTE_R: |
| case RTNLGRP_IPV6_MROUTE_R: |
| if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
| return -EPERM; |
| break; |
| } |
| return 0; |
| } |
| |
| 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_REBOOT: |
| case NETDEV_CHANGEMTU: |
| case NETDEV_CHANGEADDR: |
| case NETDEV_CHANGENAME: |
| case NETDEV_FEAT_CHANGE: |
| case NETDEV_BONDING_FAILOVER: |
| case NETDEV_POST_TYPE_CHANGE: |
| case NETDEV_NOTIFY_PEERS: |
| case NETDEV_CHANGEUPPER: |
| case NETDEV_RESEND_IGMP: |
| case NETDEV_CHANGEINFODATA: |
| case NETDEV_CHANGELOWERSTATE: |
| case NETDEV_CHANGE_TX_QUEUE_LEN: |
| rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event), |
| GFP_KERNEL, NULL, 0, 0, NULL); |
| break; |
| default: |
| 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, |
| .flags = NL_CFG_F_NONROOT_RECV, |
| .bind = rtnetlink_bind, |
| }; |
| |
| 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_FLAG_DUMP_SPLIT_NLM_DONE); |
| rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0); |
| rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0); |
| rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0); |
| |
| rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0); |
| rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0); |
| rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0); |
| |
| rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0); |
| rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0); |
| |
| rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0); |
| rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, |
| RTNL_FLAG_BULK_DEL_SUPPORTED); |
| rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0); |
| |
| rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0); |
| rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0); |
| rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0); |
| |
| rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, |
| 0); |
| rtnl_register(PF_UNSPEC, RTM_SETSTATS, rtnl_stats_set, NULL, 0); |
| |
| rtnl_register(PF_BRIDGE, RTM_GETMDB, rtnl_mdb_get, rtnl_mdb_dump, 0); |
| rtnl_register(PF_BRIDGE, RTM_NEWMDB, rtnl_mdb_add, NULL, 0); |
| rtnl_register(PF_BRIDGE, RTM_DELMDB, rtnl_mdb_del, NULL, |
| RTNL_FLAG_BULK_DEL_SUPPORTED); |
| } |