![Eric Dumazet](/assets/img/avatar_default.png)
It seems that rtnl_group_changelink() can call do_setlink
while a prior call to validate_linkmsg(dev = NULL, ...) could
not validate IFLA_ADDRESS / IFLA_BROADCAST
Make sure do_setlink() calls validate_linkmsg() instead
of letting its callers having this responsibility.
With help from Dmitry Vyukov, thanks a lot !
BUG: KMSAN: uninit-value in is_valid_ether_addr include/linux/etherdevice.h:199 [inline]
BUG: KMSAN: uninit-value in eth_prepare_mac_addr_change net/ethernet/eth.c:275 [inline]
BUG: KMSAN: uninit-value in eth_mac_addr+0x203/0x2b0 net/ethernet/eth.c:308
CPU: 1 PID: 8695 Comm: syz-executor3 Not tainted 4.17.0-rc5+ #103
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x185/0x1d0 lib/dump_stack.c:113
kmsan_report+0x149/0x260 mm/kmsan/kmsan.c:1084
__msan_warning_32+0x6e/0xc0 mm/kmsan/kmsan_instr.c:686
is_valid_ether_addr include/linux/etherdevice.h:199 [inline]
eth_prepare_mac_addr_change net/ethernet/eth.c:275 [inline]
eth_mac_addr+0x203/0x2b0 net/ethernet/eth.c:308
dev_set_mac_address+0x261/0x530 net/core/dev.c:7157
do_setlink+0xbc3/0x5fc0 net/core/rtnetlink.c:2317
rtnl_group_changelink net/core/rtnetlink.c:2824 [inline]
rtnl_newlink+0x1fe9/0x37a0 net/core/rtnetlink.c:2976
rtnetlink_rcv_msg+0xa32/0x1560 net/core/rtnetlink.c:4646
netlink_rcv_skb+0x378/0x600 net/netlink/af_netlink.c:2448
rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:4664
netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
netlink_unicast+0x1678/0x1750 net/netlink/af_netlink.c:1336
netlink_sendmsg+0x104f/0x1350 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:629 [inline]
sock_sendmsg net/socket.c:639 [inline]
___sys_sendmsg+0xec0/0x1310 net/socket.c:2117
__sys_sendmsg net/socket.c:2155 [inline]
__do_sys_sendmsg net/socket.c:2164 [inline]
__se_sys_sendmsg net/socket.c:2162 [inline]
__x64_sys_sendmsg+0x331/0x460 net/socket.c:2162
do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455a09
RSP: 002b:00007fc07480ec68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc07480f6d4 RCX: 0000000000455a09
RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000005d0 R14: 00000000006fdc20 R15: 0000000000000000
Uninit was stored to memory at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline]
kmsan_save_stack mm/kmsan/kmsan.c:294 [inline]
kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685
kmsan_memcpy_origins+0x11d/0x170 mm/kmsan/kmsan.c:527
__msan_memcpy+0x109/0x160 mm/kmsan/kmsan_instr.c:478
do_setlink+0xb84/0x5fc0 net/core/rtnetlink.c:2315
rtnl_group_changelink net/core/rtnetlink.c:2824 [inline]
rtnl_newlink+0x1fe9/0x37a0 net/core/rtnetlink.c:2976
rtnetlink_rcv_msg+0xa32/0x1560 net/core/rtnetlink.c:4646
netlink_rcv_skb+0x378/0x600 net/netlink/af_netlink.c:2448
rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:4664
netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
netlink_unicast+0x1678/0x1750 net/netlink/af_netlink.c:1336
netlink_sendmsg+0x104f/0x1350 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:629 [inline]
sock_sendmsg net/socket.c:639 [inline]
___sys_sendmsg+0xec0/0x1310 net/socket.c:2117
__sys_sendmsg net/socket.c:2155 [inline]
__do_sys_sendmsg net/socket.c:2164 [inline]
__se_sys_sendmsg net/socket.c:2162 [inline]
__x64_sys_sendmsg+0x331/0x460 net/socket.c:2162
do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline]
kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:189
kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:315
kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan.c:322
slab_post_alloc_hook mm/slab.h:446 [inline]
slab_alloc_node mm/slub.c:2753 [inline]
__kmalloc_node_track_caller+0xb32/0x11b0 mm/slub.c:4395
__kmalloc_reserve net/core/skbuff.c:138 [inline]
__alloc_skb+0x2cb/0x9e0 net/core/skbuff.c:206
alloc_skb include/linux/skbuff.h:988 [inline]
netlink_alloc_large_skb net/netlink/af_netlink.c:1182 [inline]
netlink_sendmsg+0x76e/0x1350 net/netlink/af_netlink.c:1876
sock_sendmsg_nosec net/socket.c:629 [inline]
sock_sendmsg net/socket.c:639 [inline]
___sys_sendmsg+0xec0/0x1310 net/socket.c:2117
__sys_sendmsg net/socket.c:2155 [inline]
__do_sys_sendmsg net/socket.c:2164 [inline]
__se_sys_sendmsg net/socket.c:2162 [inline]
__x64_sys_sendmsg+0x331/0x460 net/socket.c:2162
do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Fixes: e7ed828f10
("netlink: support setting devgroup parameters")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4784 lines
114 KiB
C
4784 lines
114 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Routing netlink socket interface: protocol independent part.
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Fixes:
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* Vitaly E. Lavrov RTA_OK arithmetics was wrong.
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*/
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#include <linux/bitops.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/string.h>
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#include <linux/sockios.h>
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#include <linux/net.h>
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#include <linux/fcntl.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/capability.h>
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#include <linux/skbuff.h>
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#include <linux/init.h>
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#include <linux/security.h>
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#include <linux/mutex.h>
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#include <linux/if_addr.h>
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#include <linux/if_bridge.h>
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#include <linux/if_vlan.h>
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#include <linux/pci.h>
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#include <linux/etherdevice.h>
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#include <linux/bpf.h>
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#include <linux/uaccess.h>
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#include <linux/inet.h>
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#include <linux/netdevice.h>
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#include <net/switchdev.h>
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#include <net/ip.h>
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#include <net/protocol.h>
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#include <net/arp.h>
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#include <net/route.h>
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#include <net/udp.h>
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#include <net/tcp.h>
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#include <net/sock.h>
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#include <net/pkt_sched.h>
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#include <net/fib_rules.h>
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#include <net/rtnetlink.h>
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#include <net/net_namespace.h>
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#define RTNL_MAX_TYPE 48
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#define RTNL_SLAVE_MAX_TYPE 36
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struct rtnl_link {
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rtnl_doit_func doit;
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rtnl_dumpit_func dumpit;
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struct module *owner;
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unsigned int flags;
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struct rcu_head rcu;
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};
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static DEFINE_MUTEX(rtnl_mutex);
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void rtnl_lock(void)
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{
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mutex_lock(&rtnl_mutex);
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}
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EXPORT_SYMBOL(rtnl_lock);
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int rtnl_lock_killable(void)
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{
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return mutex_lock_killable(&rtnl_mutex);
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}
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EXPORT_SYMBOL(rtnl_lock_killable);
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static struct sk_buff *defer_kfree_skb_list;
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void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
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{
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if (head && tail) {
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tail->next = defer_kfree_skb_list;
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defer_kfree_skb_list = head;
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}
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}
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EXPORT_SYMBOL(rtnl_kfree_skbs);
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void __rtnl_unlock(void)
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{
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struct sk_buff *head = defer_kfree_skb_list;
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defer_kfree_skb_list = NULL;
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mutex_unlock(&rtnl_mutex);
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while (head) {
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struct sk_buff *next = head->next;
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kfree_skb(head);
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cond_resched();
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head = next;
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}
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}
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void rtnl_unlock(void)
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{
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/* This fellow will unlock it for us. */
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netdev_run_todo();
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}
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EXPORT_SYMBOL(rtnl_unlock);
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int rtnl_trylock(void)
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{
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return mutex_trylock(&rtnl_mutex);
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}
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EXPORT_SYMBOL(rtnl_trylock);
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int rtnl_is_locked(void)
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{
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return mutex_is_locked(&rtnl_mutex);
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}
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EXPORT_SYMBOL(rtnl_is_locked);
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#ifdef CONFIG_PROVE_LOCKING
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bool lockdep_rtnl_is_held(void)
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{
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return lockdep_is_held(&rtnl_mutex);
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}
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EXPORT_SYMBOL(lockdep_rtnl_is_held);
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#endif /* #ifdef CONFIG_PROVE_LOCKING */
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static struct rtnl_link *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
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static inline int rtm_msgindex(int msgtype)
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{
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int msgindex = msgtype - RTM_BASE;
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/*
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* msgindex < 0 implies someone tried to register a netlink
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* control code. msgindex >= RTM_NR_MSGTYPES may indicate that
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* the message type has not been added to linux/rtnetlink.h
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*/
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BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
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return msgindex;
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}
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static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
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{
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struct rtnl_link **tab;
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if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
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protocol = PF_UNSPEC;
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tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
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if (!tab)
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tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
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return tab[msgtype];
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}
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static int rtnl_register_internal(struct module *owner,
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int protocol, int msgtype,
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rtnl_doit_func doit, rtnl_dumpit_func dumpit,
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unsigned int flags)
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{
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struct rtnl_link *link, *old;
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struct rtnl_link __rcu **tab;
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int msgindex;
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int ret = -ENOBUFS;
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BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
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msgindex = rtm_msgindex(msgtype);
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rtnl_lock();
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tab = rtnl_msg_handlers[protocol];
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if (tab == NULL) {
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tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
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if (!tab)
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goto unlock;
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/* ensures we see the 0 stores */
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rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
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}
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old = rtnl_dereference(tab[msgindex]);
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if (old) {
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link = kmemdup(old, sizeof(*old), GFP_KERNEL);
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if (!link)
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goto unlock;
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} else {
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link = kzalloc(sizeof(*link), GFP_KERNEL);
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if (!link)
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goto unlock;
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}
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WARN_ON(link->owner && link->owner != owner);
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link->owner = owner;
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WARN_ON(doit && link->doit && link->doit != doit);
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if (doit)
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link->doit = doit;
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WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
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if (dumpit)
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link->dumpit = dumpit;
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link->flags |= flags;
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/* publish protocol:msgtype */
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rcu_assign_pointer(tab[msgindex], link);
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ret = 0;
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if (old)
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kfree_rcu(old, rcu);
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unlock:
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rtnl_unlock();
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return ret;
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}
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/**
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* rtnl_register_module - Register a rtnetlink message type
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*
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* @owner: module registering the hook (THIS_MODULE)
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* @protocol: Protocol family or PF_UNSPEC
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* @msgtype: rtnetlink message type
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* @doit: Function pointer called for each request message
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* @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
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* @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
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*
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* Like rtnl_register, but for use by removable modules.
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*/
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int rtnl_register_module(struct module *owner,
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int protocol, int msgtype,
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rtnl_doit_func doit, rtnl_dumpit_func dumpit,
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unsigned int flags)
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{
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return rtnl_register_internal(owner, protocol, msgtype,
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doit, dumpit, flags);
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}
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EXPORT_SYMBOL_GPL(rtnl_register_module);
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/**
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* rtnl_register - Register a rtnetlink message type
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* @protocol: Protocol family or PF_UNSPEC
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* @msgtype: rtnetlink message type
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* @doit: Function pointer called for each request message
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* @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
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* @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
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*
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* Registers the specified function pointers (at least one of them has
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* to be non-NULL) to be called whenever a request message for the
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* specified protocol family and message type is received.
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*
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* The special protocol family PF_UNSPEC may be used to define fallback
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* function pointers for the case when no entry for the specific protocol
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* family exists.
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*/
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void rtnl_register(int protocol, int msgtype,
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rtnl_doit_func doit, rtnl_dumpit_func dumpit,
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unsigned int flags)
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{
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int err;
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err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
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flags);
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if (err)
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pr_err("Unable to register rtnetlink message handler, "
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"protocol = %d, message type = %d\n", protocol, msgtype);
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}
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/**
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* rtnl_unregister - Unregister a rtnetlink message type
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* @protocol: Protocol family or PF_UNSPEC
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* @msgtype: rtnetlink message type
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*
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* Returns 0 on success or a negative error code.
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*/
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int rtnl_unregister(int protocol, int msgtype)
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{
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struct rtnl_link **tab, *link;
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int msgindex;
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BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
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msgindex = rtm_msgindex(msgtype);
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rtnl_lock();
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tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
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if (!tab) {
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rtnl_unlock();
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return -ENOENT;
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}
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link = tab[msgindex];
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rcu_assign_pointer(tab[msgindex], NULL);
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rtnl_unlock();
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kfree_rcu(link, rcu);
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return 0;
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}
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EXPORT_SYMBOL_GPL(rtnl_unregister);
|
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|
|
/**
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* rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
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* @protocol : Protocol family or PF_UNSPEC
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*
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* Identical to calling rtnl_unregster() for all registered message types
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* of a certain protocol family.
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*/
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void rtnl_unregister_all(int protocol)
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{
|
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struct rtnl_link **tab, *link;
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int msgindex;
|
|
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BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
|
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rtnl_lock();
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tab = rtnl_msg_handlers[protocol];
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RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
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for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
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link = tab[msgindex];
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if (!link)
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continue;
|
|
|
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rcu_assign_pointer(tab[msgindex], NULL);
|
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kfree_rcu(link, rcu);
|
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}
|
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rtnl_unlock();
|
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|
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synchronize_net();
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kfree(tab);
|
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}
|
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EXPORT_SYMBOL_GPL(rtnl_unregister_all);
|
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|
|
static LIST_HEAD(link_ops);
|
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|
|
static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
|
|
{
|
|
const struct rtnl_link_ops *ops;
|
|
|
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list_for_each_entry(ops, &link_ops, list) {
|
|
if (!strcmp(ops->kind, kind))
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return ops;
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}
|
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return NULL;
|
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}
|
|
|
|
/**
|
|
* __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
|
|
* @ops: struct rtnl_link_ops * to register
|
|
*
|
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* 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.
|
|
*
|
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* Returns 0 on success or a negative error code.
|
|
*/
|
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int __rtnl_link_register(struct rtnl_link_ops *ops)
|
|
{
|
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if (rtnl_link_ops_get(ops->kind))
|
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return -EEXIST;
|
|
|
|
/* The check for setup is here because if ops
|
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* does not have that filled up, it is not possible
|
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* to use the ops for creating device. So do not
|
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* fill up dellink as well. That disables rtnl_dellink.
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*/
|
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if (ops->setup && !ops->dellink)
|
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ops->dellink = unregister_netdevice_queue;
|
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|
|
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)
|
|
{
|
|
struct net *net;
|
|
bool unregistering;
|
|
DEFINE_WAIT_FUNC(wait, woken_wake_function);
|
|
|
|
add_wait_queue(&netdev_unregistering_wq, &wait);
|
|
for (;;) {
|
|
unregistering = false;
|
|
rtnl_lock();
|
|
/* We held write locked pernet_ops_rwsem, and parallel
|
|
* setup_net() and cleanup_net() are not possible.
|
|
*/
|
|
for_each_net(net) {
|
|
if (net->dev_unreg_count > 0) {
|
|
unregistering = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!unregistering)
|
|
break;
|
|
__rtnl_unlock();
|
|
|
|
wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
|
|
}
|
|
remove_wait_queue(&netdev_unregistering_wq, &wait);
|
|
}
|
|
|
|
/**
|
|
* rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
|
|
* @ops: struct rtnl_link_ops * to unregister
|
|
*/
|
|
void rtnl_link_unregister(struct rtnl_link_ops *ops)
|
|
{
|
|
/* Close the race with 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;
|
|
|
|
list_for_each_entry_rcu(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(skb, IFLA_INFO_SLAVE_DATA);
|
|
if (!slave_data)
|
|
return -EMSGSIZE;
|
|
err = ops->fill_slave_info(skb, master_dev, dev);
|
|
if (err < 0)
|
|
goto err_cancel_slave_data;
|
|
nla_nest_end(skb, slave_data);
|
|
}
|
|
return 0;
|
|
|
|
err_cancel_slave_data:
|
|
nla_nest_cancel(skb, slave_data);
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_link_info_fill(struct sk_buff *skb,
|
|
const struct net_device *dev)
|
|
{
|
|
const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
|
|
struct nlattr *data;
|
|
int err;
|
|
|
|
if (!ops)
|
|
return 0;
|
|
if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
|
|
return -EMSGSIZE;
|
|
if (ops->fill_xstats) {
|
|
err = ops->fill_xstats(skb, dev);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
if (ops->fill_info) {
|
|
data = nla_nest_start(skb, IFLA_INFO_DATA);
|
|
if (data == NULL)
|
|
return -EMSGSIZE;
|
|
err = ops->fill_info(skb, dev);
|
|
if (err < 0)
|
|
goto err_cancel_data;
|
|
nla_nest_end(skb, data);
|
|
}
|
|
return 0;
|
|
|
|
err_cancel_data:
|
|
nla_nest_cancel(skb, data);
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
|
|
{
|
|
struct nlattr *linkinfo;
|
|
int err = -EMSGSIZE;
|
|
|
|
linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
|
|
if (linkinfo == NULL)
|
|
goto out;
|
|
|
|
err = rtnl_link_info_fill(skb, dev);
|
|
if (err < 0)
|
|
goto err_cancel_link;
|
|
|
|
err = rtnl_link_slave_info_fill(skb, dev);
|
|
if (err < 0)
|
|
goto err_cancel_link;
|
|
|
|
nla_nest_end(skb, linkinfo);
|
|
return 0;
|
|
|
|
err_cancel_link:
|
|
nla_nest_cancel(skb, linkinfo);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
|
|
{
|
|
struct sock *rtnl = net->rtnl;
|
|
int err = 0;
|
|
|
|
NETLINK_CB(skb).dst_group = group;
|
|
if (echo)
|
|
refcount_inc(&skb->users);
|
|
netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
|
|
if (echo)
|
|
err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
|
|
return err;
|
|
}
|
|
|
|
int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
|
|
{
|
|
struct sock *rtnl = net->rtnl;
|
|
|
|
return nlmsg_unicast(rtnl, skb, pid);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_unicast);
|
|
|
|
void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
|
|
struct nlmsghdr *nlh, gfp_t flags)
|
|
{
|
|
struct sock *rtnl = net->rtnl;
|
|
int report = 0;
|
|
|
|
if (nlh)
|
|
report = nlmsg_report(nlh);
|
|
|
|
nlmsg_notify(rtnl, skb, pid, group, report, flags);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_notify);
|
|
|
|
void rtnl_set_sk_err(struct net *net, u32 group, int error)
|
|
{
|
|
struct sock *rtnl = net->rtnl;
|
|
|
|
netlink_set_err(rtnl, 0, group, error);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_set_sk_err);
|
|
|
|
int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
|
|
{
|
|
struct nlattr *mx;
|
|
int i, valid = 0;
|
|
|
|
mx = nla_nest_start(skb, RTA_METRICS);
|
|
if (mx == NULL)
|
|
return -ENOBUFS;
|
|
|
|
for (i = 0; i < RTAX_MAX; i++) {
|
|
if (metrics[i]) {
|
|
if (i == RTAX_CC_ALGO - 1) {
|
|
char tmp[TCP_CA_NAME_MAX], *name;
|
|
|
|
name = tcp_ca_get_name_by_key(metrics[i], tmp);
|
|
if (!name)
|
|
continue;
|
|
if (nla_put_string(skb, i + 1, name))
|
|
goto nla_put_failure;
|
|
} else if (i == RTAX_FEATURES - 1) {
|
|
u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
|
|
|
|
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 = atomic_read(&dst->__refcnt);
|
|
}
|
|
if (expires) {
|
|
unsigned long clock;
|
|
|
|
clock = jiffies_to_clock_t(abs(expires));
|
|
clock = min_t(unsigned long, clock, INT_MAX);
|
|
ci.rta_expires = (expires > 0) ? clock : -clock;
|
|
}
|
|
return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
|
|
|
|
static void set_operstate(struct net_device *dev, unsigned char transition)
|
|
{
|
|
unsigned char operstate = dev->operstate;
|
|
|
|
switch (transition) {
|
|
case IF_OPER_UP:
|
|
if ((operstate == IF_OPER_DORMANT ||
|
|
operstate == IF_OPER_UNKNOWN) &&
|
|
!netif_dormant(dev))
|
|
operstate = IF_OPER_UP;
|
|
break;
|
|
|
|
case IF_OPER_DORMANT:
|
|
if (operstate == IF_OPER_UP ||
|
|
operstate == IF_OPER_UNKNOWN)
|
|
operstate = IF_OPER_DORMANT;
|
|
break;
|
|
}
|
|
|
|
if (dev->operstate != operstate) {
|
|
write_lock_bh(&dev_base_lock);
|
|
dev->operstate = operstate;
|
|
write_unlock_bh(&dev_base_lock);
|
|
netdev_state_change(dev);
|
|
}
|
|
}
|
|
|
|
static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
|
|
{
|
|
return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
|
|
(dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
|
|
}
|
|
|
|
static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
|
|
const struct ifinfomsg *ifm)
|
|
{
|
|
unsigned int flags = ifm->ifi_flags;
|
|
|
|
/* bugwards compatibility: ifi_change == 0 is treated as ~0 */
|
|
if (ifm->ifi_change)
|
|
flags = (flags & ifm->ifi_change) |
|
|
(rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
|
|
|
|
return flags;
|
|
}
|
|
|
|
static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
|
|
const struct rtnl_link_stats64 *b)
|
|
{
|
|
a->rx_packets = b->rx_packets;
|
|
a->tx_packets = b->tx_packets;
|
|
a->rx_bytes = b->rx_bytes;
|
|
a->tx_bytes = b->tx_bytes;
|
|
a->rx_errors = b->rx_errors;
|
|
a->tx_errors = b->tx_errors;
|
|
a->rx_dropped = b->rx_dropped;
|
|
a->tx_dropped = b->tx_dropped;
|
|
|
|
a->multicast = b->multicast;
|
|
a->collisions = b->collisions;
|
|
|
|
a->rx_length_errors = b->rx_length_errors;
|
|
a->rx_over_errors = b->rx_over_errors;
|
|
a->rx_crc_errors = b->rx_crc_errors;
|
|
a->rx_frame_errors = b->rx_frame_errors;
|
|
a->rx_fifo_errors = b->rx_fifo_errors;
|
|
a->rx_missed_errors = b->rx_missed_errors;
|
|
|
|
a->tx_aborted_errors = b->tx_aborted_errors;
|
|
a->tx_carrier_errors = b->tx_carrier_errors;
|
|
a->tx_fifo_errors = b->tx_fifo_errors;
|
|
a->tx_heartbeat_errors = b->tx_heartbeat_errors;
|
|
a->tx_window_errors = b->tx_window_errors;
|
|
|
|
a->rx_compressed = b->rx_compressed;
|
|
a->tx_compressed = b->tx_compressed;
|
|
|
|
a->rx_nohandler = b->rx_nohandler;
|
|
}
|
|
|
|
/* All VF info */
|
|
static inline int rtnl_vfinfo_size(const struct net_device *dev,
|
|
u32 ext_filter_mask)
|
|
{
|
|
if (dev->dev.parent && (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_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(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)) +
|
|
nla_total_size(sizeof(struct ifla_vf_trust)));
|
|
return size;
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
static size_t rtnl_port_size(const struct net_device *dev,
|
|
u32 ext_filter_mask)
|
|
{
|
|
size_t port_size = nla_total_size(4) /* PORT_VF */
|
|
+ nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
|
|
+ nla_total_size(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 */
|
|
|
|
return xdp_size;
|
|
}
|
|
|
|
static noinline size_t if_nlmsg_size(const struct net_device *dev,
|
|
u32 ext_filter_mask)
|
|
{
|
|
return NLMSG_ALIGN(sizeof(struct ifinfomsg))
|
|
+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
|
|
+ nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
|
|
+ nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
|
|
+ nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
|
|
+ nla_total_size(sizeof(struct rtnl_link_stats))
|
|
+ nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
|
|
+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
|
|
+ nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
|
|
+ nla_total_size(4) /* IFLA_TXQLEN */
|
|
+ nla_total_size(4) /* IFLA_WEIGHT */
|
|
+ nla_total_size(4) /* IFLA_MTU */
|
|
+ nla_total_size(4) /* IFLA_LINK */
|
|
+ nla_total_size(4) /* IFLA_MASTER */
|
|
+ nla_total_size(1) /* IFLA_CARRIER */
|
|
+ nla_total_size(4) /* IFLA_PROMISCUITY */
|
|
+ nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
|
|
+ nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
|
|
+ nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
|
|
+ nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
|
|
+ nla_total_size(1) /* IFLA_OPERSTATE */
|
|
+ nla_total_size(1) /* IFLA_LINKMODE */
|
|
+ nla_total_size(4) /* IFLA_CARRIER_CHANGES */
|
|
+ nla_total_size(4) /* IFLA_LINK_NETNSID */
|
|
+ nla_total_size(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 */
|
|
+ nla_total_size(1) /* IFLA_PROTO_DOWN */
|
|
+ nla_total_size(4) /* IFLA_IF_NETNSID */
|
|
+ nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
|
|
+ nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
|
|
+ 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(skb, IFLA_VF_PORTS);
|
|
if (!vf_ports)
|
|
return -EMSGSIZE;
|
|
|
|
for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
|
|
vf_port = nla_nest_start(skb, IFLA_VF_PORT);
|
|
if (!vf_port)
|
|
goto nla_put_failure;
|
|
if (nla_put_u32(skb, IFLA_PORT_VF, vf))
|
|
goto nla_put_failure;
|
|
err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
|
|
if (err == -EMSGSIZE)
|
|
goto nla_put_failure;
|
|
if (err) {
|
|
nla_nest_cancel(skb, vf_port);
|
|
continue;
|
|
}
|
|
nla_nest_end(skb, vf_port);
|
|
}
|
|
|
|
nla_nest_end(skb, vf_ports);
|
|
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
nla_nest_cancel(skb, vf_ports);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct nlattr *port_self;
|
|
int err;
|
|
|
|
port_self = nla_nest_start(skb, IFLA_PORT_SELF);
|
|
if (!port_self)
|
|
return -EMSGSIZE;
|
|
|
|
err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
|
|
if (err) {
|
|
nla_nest_cancel(skb, port_self);
|
|
return (err == -EMSGSIZE) ? err : 0;
|
|
}
|
|
|
|
nla_nest_end(skb, port_self);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
|
|
u32 ext_filter_mask)
|
|
{
|
|
int err;
|
|
|
|
if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
|
|
!(ext_filter_mask & RTEXT_FILTER_VF))
|
|
return 0;
|
|
|
|
err = rtnl_port_self_fill(skb, dev);
|
|
if (err)
|
|
return err;
|
|
|
|
if (dev_num_vf(dev->dev.parent)) {
|
|
err = rtnl_vf_ports_fill(skb, dev);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
int err;
|
|
struct netdev_phys_item_id ppid;
|
|
|
|
err = dev_get_phys_port_id(dev, &ppid);
|
|
if (err) {
|
|
if (err == -EOPNOTSUPP)
|
|
return 0;
|
|
return err;
|
|
}
|
|
|
|
if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
|
|
return -EMSGSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
char name[IFNAMSIZ];
|
|
int err;
|
|
|
|
err = dev_get_phys_port_name(dev, name, sizeof(name));
|
|
if (err) {
|
|
if (err == -EOPNOTSUPP)
|
|
return 0;
|
|
return err;
|
|
}
|
|
|
|
if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
|
|
return -EMSGSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
int err;
|
|
struct switchdev_attr attr = {
|
|
.orig_dev = dev,
|
|
.id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
|
|
.flags = SWITCHDEV_F_NO_RECURSE,
|
|
};
|
|
|
|
err = switchdev_port_attr_get(dev, &attr);
|
|
if (err) {
|
|
if (err == -EOPNOTSUPP)
|
|
return 0;
|
|
return err;
|
|
}
|
|
|
|
if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
|
|
attr.u.ppid.id))
|
|
return -EMSGSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
|
|
struct net_device *dev)
|
|
{
|
|
struct rtnl_link_stats64 *sp;
|
|
struct nlattr *attr;
|
|
|
|
attr = nla_reserve_64bit(skb, IFLA_STATS64,
|
|
sizeof(struct rtnl_link_stats64), IFLA_PAD);
|
|
if (!attr)
|
|
return -EMSGSIZE;
|
|
|
|
sp = nla_data(attr);
|
|
dev_get_stats(dev, sp);
|
|
|
|
attr = nla_reserve(skb, IFLA_STATS,
|
|
sizeof(struct rtnl_link_stats));
|
|
if (!attr)
|
|
return -EMSGSIZE;
|
|
|
|
copy_rtnl_link_stats(nla_data(attr), sp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
|
|
struct net_device *dev,
|
|
int vfs_num,
|
|
struct nlattr *vfinfo)
|
|
{
|
|
struct ifla_vf_rss_query_en vf_rss_query_en;
|
|
struct 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_info ivi;
|
|
|
|
memset(&ivi, 0, sizeof(ivi));
|
|
|
|
/* Not all SR-IOV capable drivers support the
|
|
* spoofcheck and "RSS query enable" query. Preset to
|
|
* -1 so the user space tool can detect that the driver
|
|
* didn't report anything.
|
|
*/
|
|
ivi.spoofchk = -1;
|
|
ivi.rss_query_en = -1;
|
|
ivi.trusted = -1;
|
|
/* The default value for VF link state is "auto"
|
|
* IFLA_VF_LINK_STATE_AUTO which equals zero
|
|
*/
|
|
ivi.linkstate = 0;
|
|
/* 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));
|
|
|
|
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 = ivi.vf;
|
|
|
|
memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
|
|
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(skb, IFLA_VF_INFO);
|
|
if (!vf)
|
|
goto nla_put_vfinfo_failure;
|
|
if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
|
|
nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
|
|
nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
|
|
&vf_rate) ||
|
|
nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
|
|
&vf_tx_rate) ||
|
|
nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
|
|
&vf_spoofchk) ||
|
|
nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
|
|
&vf_linkstate) ||
|
|
nla_put(skb, IFLA_VF_RSS_QUERY_EN,
|
|
sizeof(vf_rss_query_en),
|
|
&vf_rss_query_en) ||
|
|
nla_put(skb, IFLA_VF_TRUST,
|
|
sizeof(vf_trust), &vf_trust))
|
|
goto nla_put_vf_failure;
|
|
vfvlanlist = nla_nest_start(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);
|
|
memset(&vf_stats, 0, sizeof(vf_stats));
|
|
if (dev->netdev_ops->ndo_get_vf_stats)
|
|
dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
|
|
&vf_stats);
|
|
vfstats = nla_nest_start(skb, IFLA_VF_STATS);
|
|
if (!vfstats)
|
|
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);
|
|
nla_put_vfinfo_failure:
|
|
nla_nest_cancel(skb, vfinfo);
|
|
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(skb, IFLA_VFINFO_LIST);
|
|
if (!vfinfo)
|
|
return -EMSGSIZE;
|
|
|
|
for (i = 0; i < num_vfs; i++) {
|
|
if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
nla_nest_end(skb, vfinfo);
|
|
return 0;
|
|
}
|
|
|
|
static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct rtnl_link_ifmap map;
|
|
|
|
memset(&map, 0, sizeof(map));
|
|
map.mem_start = dev->mem_start;
|
|
map.mem_end = dev->mem_end;
|
|
map.base_addr = dev->base_addr;
|
|
map.irq = dev->irq;
|
|
map.dma = dev->dma;
|
|
map.port = dev->if_port;
|
|
|
|
if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
|
|
return -EMSGSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u8 rtnl_xdp_attached_mode(struct net_device *dev, u32 *prog_id)
|
|
{
|
|
const struct net_device_ops *ops = dev->netdev_ops;
|
|
const struct bpf_prog *generic_xdp_prog;
|
|
struct netdev_bpf xdp;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
*prog_id = 0;
|
|
generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
|
|
if (generic_xdp_prog) {
|
|
*prog_id = generic_xdp_prog->aux->id;
|
|
return XDP_ATTACHED_SKB;
|
|
}
|
|
if (!ops->ndo_bpf)
|
|
return XDP_ATTACHED_NONE;
|
|
|
|
__dev_xdp_query(dev, ops->ndo_bpf, &xdp);
|
|
*prog_id = xdp.prog_id;
|
|
|
|
return xdp.prog_attached;
|
|
}
|
|
|
|
static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct nlattr *xdp;
|
|
u32 prog_id;
|
|
int err;
|
|
|
|
xdp = nla_nest_start(skb, IFLA_XDP);
|
|
if (!xdp)
|
|
return -EMSGSIZE;
|
|
|
|
err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
|
|
rtnl_xdp_attached_mode(dev, &prog_id));
|
|
if (err)
|
|
goto err_cancel;
|
|
|
|
if (prog_id) {
|
|
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, upper_dev->ifindex);
|
|
|
|
rcu_read_unlock();
|
|
return ret;
|
|
}
|
|
|
|
static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev)
|
|
{
|
|
int ifindex = dev_get_iflink(dev);
|
|
|
|
if (dev->ifindex == ifindex)
|
|
return 0;
|
|
|
|
return nla_put_u32(skb, IFLA_LINK, ifindex);
|
|
}
|
|
|
|
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)
|
|
{
|
|
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);
|
|
|
|
if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
|
|
return -EMSGSIZE;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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(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(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_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)
|
|
{
|
|
struct ifinfomsg *ifm;
|
|
struct nlmsghdr *nlh;
|
|
|
|
ASSERT_RTNL();
|
|
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
|
|
if (nlh == NULL)
|
|
return -EMSGSIZE;
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
ifm->ifi_family = AF_UNSPEC;
|
|
ifm->__ifi_pad = 0;
|
|
ifm->ifi_type = dev->type;
|
|
ifm->ifi_index = dev->ifindex;
|
|
ifm->ifi_flags = dev_get_flags(dev);
|
|
ifm->ifi_change = change;
|
|
|
|
if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_IF_NETNSID, tgt_netnsid))
|
|
goto nla_put_failure;
|
|
|
|
if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
|
|
nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
|
|
nla_put_u8(skb, IFLA_OPERSTATE,
|
|
netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
|
|
nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
|
|
nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
|
|
nla_put_u32(skb, IFLA_GROUP, dev->group) ||
|
|
nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
|
|
nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
|
|
nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
|
|
nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
|
|
#ifdef CONFIG_RPS
|
|
nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
|
|
#endif
|
|
nla_put_iflink(skb, dev) ||
|
|
put_master_ifindex(skb, dev) ||
|
|
nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
|
|
(dev->qdisc &&
|
|
nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
|
|
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_u8(skb, IFLA_PROTO_DOWN, dev->proto_down) ||
|
|
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 (event != IFLA_EVENT_NONE) {
|
|
if (nla_put_u32(skb, IFLA_EVENT, event))
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
if (rtnl_fill_link_ifmap(skb, dev))
|
|
goto nla_put_failure;
|
|
|
|
if (dev->addr_len) {
|
|
if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
|
|
nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
if (rtnl_phys_port_id_fill(skb, dev))
|
|
goto nla_put_failure;
|
|
|
|
if (rtnl_phys_port_name_fill(skb, dev))
|
|
goto nla_put_failure;
|
|
|
|
if (rtnl_phys_switch_id_fill(skb, dev))
|
|
goto nla_put_failure;
|
|
|
|
if (rtnl_fill_stats(skb, dev))
|
|
goto nla_put_failure;
|
|
|
|
if (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 (rtnl_fill_link_netnsid(skb, dev, src_net))
|
|
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;
|
|
|
|
|
|
rcu_read_lock();
|
|
if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
|
|
goto nla_put_failure_rcu;
|
|
rcu_read_unlock();
|
|
|
|
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_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_IF_NETNSID] = { .type = NLA_S32 },
|
|
[IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
|
|
[IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
|
|
};
|
|
|
|
static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
|
|
[IFLA_INFO_KIND] = { .type = NLA_STRING },
|
|
[IFLA_INFO_DATA] = { .type = NLA_NESTED },
|
|
[IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
|
|
[IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
|
|
};
|
|
|
|
static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
|
|
[IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
|
|
[IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
|
|
[IFLA_VF_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_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(linfo, IFLA_INFO_MAX, nla,
|
|
ifla_info_policy, NULL) < 0)
|
|
return NULL;
|
|
|
|
if (linfo[IFLA_INFO_KIND]) {
|
|
char kind[MODULE_NAME_LEN];
|
|
|
|
nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
|
|
ops = rtnl_link_ops_get(kind);
|
|
}
|
|
|
|
return ops;
|
|
}
|
|
|
|
static bool link_master_filtered(struct net_device *dev, int master_idx)
|
|
{
|
|
struct net_device *master;
|
|
|
|
if (!master_idx)
|
|
return false;
|
|
|
|
master = netdev_master_upper_dev_get(dev);
|
|
if (!master || master->ifindex != master_idx)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool link_kind_filtered(const struct net_device *dev,
|
|
const struct rtnl_link_ops *kind_ops)
|
|
{
|
|
if (kind_ops && dev->rtnl_link_ops != kind_ops)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool link_dump_filtered(struct net_device *dev,
|
|
int master_idx,
|
|
const struct rtnl_link_ops *kind_ops)
|
|
{
|
|
if (link_master_filtered(dev, master_idx) ||
|
|
link_kind_filtered(dev, kind_ops))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static struct net *get_target_net(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;
|
|
}
|
|
|
|
static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct net *tgt_net = net;
|
|
int h, s_h;
|
|
int idx = 0, s_idx;
|
|
struct net_device *dev;
|
|
struct hlist_head *head;
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
u32 ext_filter_mask = 0;
|
|
const struct rtnl_link_ops *kind_ops = NULL;
|
|
unsigned int flags = NLM_F_MULTI;
|
|
int master_idx = 0;
|
|
int netnsid = -1;
|
|
int err;
|
|
int hdrlen;
|
|
|
|
s_h = cb->args[0];
|
|
s_idx = cb->args[1];
|
|
|
|
/* A hack to preserve kernel<->userspace interface.
|
|
* The correct header is ifinfomsg. It is consistent with rtnl_getlink.
|
|
* However, before Linux v3.9 the code here assumed rtgenmsg and that's
|
|
* what iproute2 < v3.9.0 used.
|
|
* We can detect the old iproute2. Even including the IFLA_EXT_MASK
|
|
* attribute, its netlink message is shorter than struct ifinfomsg.
|
|
*/
|
|
hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
|
|
sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
|
|
|
|
if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
|
|
ifla_policy, NULL) >= 0) {
|
|
if (tb[IFLA_IF_NETNSID]) {
|
|
netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
|
|
tgt_net = get_target_net(skb->sk, netnsid);
|
|
if (IS_ERR(tgt_net)) {
|
|
tgt_net = net;
|
|
netnsid = -1;
|
|
}
|
|
}
|
|
|
|
if (tb[IFLA_EXT_MASK])
|
|
ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
|
|
|
|
if (tb[IFLA_MASTER])
|
|
master_idx = nla_get_u32(tb[IFLA_MASTER]);
|
|
|
|
if (tb[IFLA_LINKINFO])
|
|
kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
|
|
|
|
if (master_idx || kind_ops)
|
|
flags |= NLM_F_DUMP_FILTERED;
|
|
}
|
|
|
|
for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
|
|
idx = 0;
|
|
head = &tgt_net->dev_index_head[h];
|
|
hlist_for_each_entry(dev, head, index_hlist) {
|
|
if (link_dump_filtered(dev, master_idx, kind_ops))
|
|
goto cont;
|
|
if (idx < s_idx)
|
|
goto cont;
|
|
err = rtnl_fill_ifinfo(skb, dev, net,
|
|
RTM_NEWLINK,
|
|
NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq, 0,
|
|
flags,
|
|
ext_filter_mask, 0, NULL, 0,
|
|
netnsid);
|
|
|
|
if (err < 0) {
|
|
if (likely(skb->len))
|
|
goto out;
|
|
|
|
goto out_err;
|
|
}
|
|
cont:
|
|
idx++;
|
|
}
|
|
}
|
|
out:
|
|
err = skb->len;
|
|
out_err:
|
|
cb->args[1] = idx;
|
|
cb->args[0] = h;
|
|
cb->seq = 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_ifla(struct nlattr **tb, const struct nlattr *head, int len,
|
|
struct netlink_ext_ack *exterr)
|
|
{
|
|
return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_nla_parse_ifla);
|
|
|
|
struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
|
|
{
|
|
struct net *net;
|
|
/* Examine the link attributes and figure out which
|
|
* network namespace we are talking about.
|
|
*/
|
|
if (tb[IFLA_NET_NS_PID])
|
|
net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
|
|
else if (tb[IFLA_NET_NS_FD])
|
|
net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
|
|
else
|
|
net = get_net(src_net);
|
|
return net;
|
|
}
|
|
EXPORT_SYMBOL(rtnl_link_get_net);
|
|
|
|
/* 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_IF_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_IF_NETNSID])
|
|
return get_net(src_net);
|
|
|
|
net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_IF_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_IF_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
|
|
goto invalid_attr;
|
|
|
|
if (tb[IFLA_NET_NS_PID] && (tb[IFLA_IF_NETNSID] || tb[IFLA_NET_NS_FD]))
|
|
goto invalid_attr;
|
|
|
|
if (tb[IFLA_NET_NS_FD] && (tb[IFLA_IF_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 validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
|
|
{
|
|
if (dev) {
|
|
if (tb[IFLA_ADDRESS] &&
|
|
nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
|
|
return -EINVAL;
|
|
|
|
if (tb[IFLA_BROADCAST] &&
|
|
nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (tb[IFLA_AF_SPEC]) {
|
|
struct nlattr *af;
|
|
int rem, err;
|
|
|
|
nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
|
|
const struct rtnl_af_ops *af_ops;
|
|
|
|
rcu_read_lock();
|
|
af_ops = rtnl_af_lookup(nla_type(af));
|
|
if (!af_ops) {
|
|
rcu_read_unlock();
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
|
|
if (!af_ops->set_link_af) {
|
|
rcu_read_unlock();
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (af_ops->validate_link_af) {
|
|
err = af_ops->validate_link_af(dev, af);
|
|
if (err < 0) {
|
|
rcu_read_unlock();
|
|
return err;
|
|
}
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
|
|
int guid_type)
|
|
{
|
|
const struct net_device_ops *ops = dev->netdev_ops;
|
|
|
|
return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
|
|
}
|
|
|
|
static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
|
|
{
|
|
if (dev->type != ARPHRD_INFINIBAND)
|
|
return -EOPNOTSUPP;
|
|
|
|
return handle_infiniband_guid(dev, ivt, guid_type);
|
|
}
|
|
|
|
static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
|
|
{
|
|
const struct net_device_ops *ops = dev->netdev_ops;
|
|
int err = -EINVAL;
|
|
|
|
if (tb[IFLA_VF_MAC]) {
|
|
struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
|
|
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_mac)
|
|
err = ops->ndo_set_vf_mac(dev, ivm->vf,
|
|
ivm->mac);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (tb[IFLA_VF_VLAN]) {
|
|
struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
|
|
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_vlan)
|
|
err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
|
|
ivv->qos,
|
|
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) < NLA_HDRLEN) {
|
|
return -EINVAL;
|
|
}
|
|
if (len >= MAX_VLAN_LIST_LEN)
|
|
return -EOPNOTSUPP;
|
|
ivvl[len] = nla_data(attr);
|
|
|
|
len++;
|
|
}
|
|
if (len == 0)
|
|
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;
|
|
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_get_vf_config)
|
|
err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_rate)
|
|
err = ops->ndo_set_vf_rate(dev, ivt->vf,
|
|
ivf.min_tx_rate,
|
|
ivt->rate);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (tb[IFLA_VF_RATE]) {
|
|
struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
|
|
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_rate)
|
|
err = ops->ndo_set_vf_rate(dev, ivt->vf,
|
|
ivt->min_tx_rate,
|
|
ivt->max_tx_rate);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (tb[IFLA_VF_SPOOFCHK]) {
|
|
struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
|
|
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_spoofchk)
|
|
err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
|
|
ivs->setting);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (tb[IFLA_VF_LINK_STATE]) {
|
|
struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
|
|
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_link_state)
|
|
err = ops->ndo_set_vf_link_state(dev, ivl->vf,
|
|
ivl->link_state);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (tb[IFLA_VF_RSS_QUERY_EN]) {
|
|
struct ifla_vf_rss_query_en *ivrssq_en;
|
|
|
|
err = -EOPNOTSUPP;
|
|
ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
|
|
if (ops->ndo_set_vf_rss_query_en)
|
|
err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
|
|
ivrssq_en->setting);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (tb[IFLA_VF_TRUST]) {
|
|
struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
|
|
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_trust)
|
|
err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (tb[IFLA_VF_IB_NODE_GUID]) {
|
|
struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
|
|
|
|
if (!ops->ndo_set_vf_guid)
|
|
return -EOPNOTSUPP;
|
|
|
|
return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
|
|
}
|
|
|
|
if (tb[IFLA_VF_IB_PORT_GUID]) {
|
|
struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
|
|
|
|
if (!ops->ndo_set_vf_guid)
|
|
return -EOPNOTSUPP;
|
|
|
|
return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int do_set_master(struct net_device *dev, int ifindex,
|
|
struct 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;
|
|
}
|
|
|
|
#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, char *ifname, int status)
|
|
{
|
|
const struct net_device_ops *ops = dev->netdev_ops;
|
|
int err;
|
|
|
|
err = validate_linkmsg(dev, tb);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_IF_NETNSID]) {
|
|
struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
|
|
tb, CAP_NET_ADMIN);
|
|
if (IS_ERR(net)) {
|
|
err = PTR_ERR(net);
|
|
goto errout;
|
|
}
|
|
|
|
err = dev_change_net_namespace(dev, net, ifname);
|
|
put_net(net);
|
|
if (err)
|
|
goto errout;
|
|
status |= DO_SETLINK_MODIFIED;
|
|
}
|
|
|
|
if (tb[IFLA_MAP]) {
|
|
struct rtnl_link_ifmap *u_map;
|
|
struct ifmap k_map;
|
|
|
|
if (!ops->ndo_set_config) {
|
|
err = -EOPNOTSUPP;
|
|
goto errout;
|
|
}
|
|
|
|
if (!netif_device_present(dev)) {
|
|
err = -ENODEV;
|
|
goto errout;
|
|
}
|
|
|
|
u_map = nla_data(tb[IFLA_MAP]);
|
|
k_map.mem_start = (unsigned long) u_map->mem_start;
|
|
k_map.mem_end = (unsigned long) u_map->mem_end;
|
|
k_map.base_addr = (unsigned short) u_map->base_addr;
|
|
k_map.irq = (unsigned char) u_map->irq;
|
|
k_map.dma = (unsigned char) u_map->dma;
|
|
k_map.port = (unsigned char) u_map->port;
|
|
|
|
err = ops->ndo_set_config(dev, &k_map);
|
|
if (err < 0)
|
|
goto errout;
|
|
|
|
status |= DO_SETLINK_NOTIFY;
|
|
}
|
|
|
|
if (tb[IFLA_ADDRESS]) {
|
|
struct sockaddr *sa;
|
|
int len;
|
|
|
|
len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
|
|
sizeof(*sa));
|
|
sa = kmalloc(len, GFP_KERNEL);
|
|
if (!sa) {
|
|
err = -ENOMEM;
|
|
goto errout;
|
|
}
|
|
sa->sa_family = dev->type;
|
|
memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
|
|
dev->addr_len);
|
|
err = dev_set_mac_address(dev, sa);
|
|
kfree(sa);
|
|
if (err)
|
|
goto errout;
|
|
status |= DO_SETLINK_MODIFIED;
|
|
}
|
|
|
|
if (tb[IFLA_MTU]) {
|
|
err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
|
|
if (err < 0)
|
|
goto errout;
|
|
status |= DO_SETLINK_MODIFIED;
|
|
}
|
|
|
|
if (tb[IFLA_GROUP]) {
|
|
dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
|
|
status |= DO_SETLINK_NOTIFY;
|
|
}
|
|
|
|
/*
|
|
* Interface selected by interface index but interface
|
|
* name provided implies that a name change has been
|
|
* requested.
|
|
*/
|
|
if (ifm->ifi_index > 0 && ifname[0]) {
|
|
err = dev_change_name(dev, ifname);
|
|
if (err < 0)
|
|
goto errout;
|
|
status |= DO_SETLINK_MODIFIED;
|
|
}
|
|
|
|
if (tb[IFLA_IFALIAS]) {
|
|
err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
|
|
nla_len(tb[IFLA_IFALIAS]));
|
|
if (err < 0)
|
|
goto errout;
|
|
status |= DO_SETLINK_NOTIFY;
|
|
}
|
|
|
|
if (tb[IFLA_BROADCAST]) {
|
|
nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
|
|
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
|
|
}
|
|
|
|
if (ifm->ifi_flags || ifm->ifi_change) {
|
|
err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
|
|
if (err < 0)
|
|
goto errout;
|
|
}
|
|
|
|
if (tb[IFLA_MASTER]) {
|
|
err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), 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 (max_size > GSO_MAX_SIZE) {
|
|
err = -EINVAL;
|
|
goto errout;
|
|
}
|
|
|
|
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 (max_segs > GSO_MAX_SEGS) {
|
|
err = -EINVAL;
|
|
goto errout;
|
|
}
|
|
|
|
if (dev->gso_max_segs ^ max_segs) {
|
|
dev->gso_max_segs = max_segs;
|
|
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]);
|
|
|
|
write_lock_bh(&dev_base_lock);
|
|
if (dev->link_mode ^ value)
|
|
status |= DO_SETLINK_NOTIFY;
|
|
dev->link_mode = value;
|
|
write_unlock_bh(&dev_base_lock);
|
|
}
|
|
|
|
if (tb[IFLA_VFINFO_LIST]) {
|
|
struct nlattr *vfinfo[IFLA_VF_MAX + 1];
|
|
struct nlattr *attr;
|
|
int rem;
|
|
|
|
nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
|
|
if (nla_type(attr) != IFLA_VF_INFO ||
|
|
nla_len(attr) < NLA_HDRLEN) {
|
|
err = -EINVAL;
|
|
goto errout;
|
|
}
|
|
err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
|
|
ifla_vf_policy, 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(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(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;
|
|
|
|
rcu_read_lock();
|
|
|
|
BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
|
|
|
|
err = af_ops->set_link_af(dev, af);
|
|
if (err < 0) {
|
|
rcu_read_unlock();
|
|
goto errout;
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
status |= DO_SETLINK_NOTIFY;
|
|
}
|
|
}
|
|
err = 0;
|
|
|
|
if (tb[IFLA_PROTO_DOWN]) {
|
|
err = dev_change_proto_down(dev,
|
|
nla_get_u8(tb[IFLA_PROTO_DOWN]));
|
|
if (err)
|
|
goto errout;
|
|
status |= DO_SETLINK_NOTIFY;
|
|
}
|
|
|
|
if (tb[IFLA_XDP]) {
|
|
struct nlattr *xdp[IFLA_XDP_MAX + 1];
|
|
u32 xdp_flags = 0;
|
|
|
|
err = nla_parse_nested(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]) {
|
|
err = dev_change_xdp_fd(dev, extack,
|
|
nla_get_s32(xdp[IFLA_XDP_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 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];
|
|
char ifname[IFNAMSIZ];
|
|
|
|
err = nlmsg_parse(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;
|
|
|
|
if (tb[IFLA_IFNAME])
|
|
nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
|
|
else
|
|
ifname[0] = '\0';
|
|
|
|
err = -EINVAL;
|
|
ifm = nlmsg_data(nlh);
|
|
if (ifm->ifi_index > 0)
|
|
dev = __dev_get_by_index(net, ifm->ifi_index);
|
|
else if (tb[IFLA_IFNAME])
|
|
dev = __dev_get_by_name(net, ifname);
|
|
else
|
|
goto errout;
|
|
|
|
if (dev == NULL) {
|
|
err = -ENODEV;
|
|
goto errout;
|
|
}
|
|
|
|
err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
|
|
errout:
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_group_dellink(const struct net *net, int group)
|
|
{
|
|
struct net_device *dev, *aux;
|
|
LIST_HEAD(list_kill);
|
|
bool found = false;
|
|
|
|
if (!group)
|
|
return -EPERM;
|
|
|
|
for_each_netdev(net, dev) {
|
|
if (dev->group == group) {
|
|
const struct rtnl_link_ops *ops;
|
|
|
|
found = true;
|
|
ops = dev->rtnl_link_ops;
|
|
if (!ops || !ops->dellink)
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
if (!found)
|
|
return -ENODEV;
|
|
|
|
for_each_netdev_safe(net, dev, aux) {
|
|
if (dev->group == group) {
|
|
const struct rtnl_link_ops *ops;
|
|
|
|
ops = dev->rtnl_link_ops;
|
|
ops->dellink(dev, &list_kill);
|
|
}
|
|
}
|
|
unregister_netdevice_many(&list_kill);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtnl_delete_link(struct net_device *dev)
|
|
{
|
|
const struct rtnl_link_ops *ops;
|
|
LIST_HEAD(list_kill);
|
|
|
|
ops = dev->rtnl_link_ops;
|
|
if (!ops || !ops->dellink)
|
|
return -EOPNOTSUPP;
|
|
|
|
ops->dellink(dev, &list_kill);
|
|
unregister_netdevice_many(&list_kill);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtnl_delete_link);
|
|
|
|
static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct net *tgt_net = net;
|
|
struct net_device *dev = NULL;
|
|
struct ifinfomsg *ifm;
|
|
char ifname[IFNAMSIZ];
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
int err;
|
|
int netnsid = -1;
|
|
|
|
err = nlmsg_parse(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_IFNAME])
|
|
nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
|
|
|
|
if (tb[IFLA_IF_NETNSID]) {
|
|
netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
|
|
tgt_net = get_target_net(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])
|
|
dev = __dev_get_by_name(tgt_net, ifname);
|
|
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] || ifm->ifi_index > 0)
|
|
err = -ENODEV;
|
|
|
|
goto out;
|
|
}
|
|
|
|
err = rtnl_delete_link(dev);
|
|
|
|
out:
|
|
if (netnsid >= 0)
|
|
put_net(tgt_net);
|
|
|
|
return err;
|
|
}
|
|
|
|
int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
|
|
{
|
|
unsigned int old_flags;
|
|
int err;
|
|
|
|
old_flags = dev->flags;
|
|
if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
|
|
err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
|
|
|
|
__dev_notify_flags(dev, old_flags, ~0U);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(rtnl_configure_link);
|
|
|
|
struct net_device *rtnl_create_link(struct net *net,
|
|
const char *ifname, unsigned char name_assign_type,
|
|
const struct rtnl_link_ops *ops, struct nlattr *tb[])
|
|
{
|
|
struct net_device *dev;
|
|
unsigned int num_tx_queues = 1;
|
|
unsigned int num_rx_queues = 1;
|
|
|
|
if (tb[IFLA_NUM_TX_QUEUES])
|
|
num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
|
|
else if (ops->get_num_tx_queues)
|
|
num_tx_queues = ops->get_num_tx_queues();
|
|
|
|
if (tb[IFLA_NUM_RX_QUEUES])
|
|
num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
|
|
else if (ops->get_num_rx_queues)
|
|
num_rx_queues = ops->get_num_rx_queues();
|
|
|
|
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);
|
|
|
|
dev_net_set(dev, net);
|
|
dev->rtnl_link_ops = ops;
|
|
dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
|
|
|
|
if (tb[IFLA_MTU])
|
|
dev->mtu = nla_get_u32(tb[IFLA_MTU]);
|
|
if (tb[IFLA_ADDRESS]) {
|
|
memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
|
|
nla_len(tb[IFLA_ADDRESS]));
|
|
dev->addr_assign_type = NET_ADDR_SET;
|
|
}
|
|
if (tb[IFLA_BROADCAST])
|
|
memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
|
|
nla_len(tb[IFLA_BROADCAST]));
|
|
if (tb[IFLA_TXQLEN])
|
|
dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
|
|
if (tb[IFLA_OPERSTATE])
|
|
set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
|
|
if (tb[IFLA_LINKMODE])
|
|
dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
|
|
if (tb[IFLA_GROUP])
|
|
dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
|
|
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])
|
|
dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
|
|
|
|
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 = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
const struct rtnl_link_ops *ops;
|
|
const struct rtnl_link_ops *m_ops = NULL;
|
|
struct net_device *dev;
|
|
struct net_device *master_dev = NULL;
|
|
struct ifinfomsg *ifm;
|
|
char kind[MODULE_NAME_LEN];
|
|
char ifname[IFNAMSIZ];
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
struct nlattr *linkinfo[IFLA_INFO_MAX+1];
|
|
unsigned char name_assign_type = NET_NAME_USER;
|
|
int err;
|
|
|
|
#ifdef CONFIG_MODULES
|
|
replay:
|
|
#endif
|
|
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = rtnl_ensure_unique_netns(tb, extack, false);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (tb[IFLA_IFNAME])
|
|
nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
|
|
else
|
|
ifname[0] = '\0';
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
if (ifm->ifi_index > 0)
|
|
dev = __dev_get_by_index(net, ifm->ifi_index);
|
|
else {
|
|
if (ifname[0])
|
|
dev = __dev_get_by_name(net, ifname);
|
|
else
|
|
dev = NULL;
|
|
}
|
|
|
|
if (dev) {
|
|
master_dev = netdev_master_upper_dev_get(dev);
|
|
if (master_dev)
|
|
m_ops = master_dev->rtnl_link_ops;
|
|
}
|
|
|
|
err = validate_linkmsg(dev, tb);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (tb[IFLA_LINKINFO]) {
|
|
err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
|
|
tb[IFLA_LINKINFO], ifla_info_policy,
|
|
NULL);
|
|
if (err < 0)
|
|
return err;
|
|
} else
|
|
memset(linkinfo, 0, sizeof(linkinfo));
|
|
|
|
if (linkinfo[IFLA_INFO_KIND]) {
|
|
nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
|
|
ops = rtnl_link_ops_get(kind);
|
|
} else {
|
|
kind[0] = '\0';
|
|
ops = NULL;
|
|
}
|
|
|
|
if (1) {
|
|
struct nlattr *attr[RTNL_MAX_TYPE + 1];
|
|
struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
|
|
struct nlattr **data = NULL;
|
|
struct nlattr **slave_data = NULL;
|
|
struct net *dest_net, *link_net = NULL;
|
|
|
|
if (ops) {
|
|
if (ops->maxtype > RTNL_MAX_TYPE)
|
|
return -EINVAL;
|
|
|
|
if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
|
|
err = nla_parse_nested(attr, ops->maxtype,
|
|
linkinfo[IFLA_INFO_DATA],
|
|
ops->policy, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
data = attr;
|
|
}
|
|
if (ops->validate) {
|
|
err = ops->validate(tb, data, extack);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
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(slave_attr,
|
|
m_ops->slave_maxtype,
|
|
linkinfo[IFLA_INFO_SLAVE_DATA],
|
|
m_ops->slave_policy,
|
|
NULL);
|
|
if (err < 0)
|
|
return err;
|
|
slave_data = 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;
|
|
|
|
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, ifname,
|
|
status);
|
|
}
|
|
|
|
if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
|
|
if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
|
|
return rtnl_group_changelink(skb, net,
|
|
nla_get_u32(tb[IFLA_GROUP]),
|
|
ifm, 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
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (!ops->setup)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!ifname[0]) {
|
|
snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
|
|
name_assign_type = NET_NAME_ENUM;
|
|
}
|
|
|
|
dest_net = rtnl_link_get_net_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) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
err = -EPERM;
|
|
if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
|
|
goto out;
|
|
}
|
|
|
|
dev = rtnl_create_link(link_net ? : dest_net, ifname,
|
|
name_assign_type, ops, tb);
|
|
if (IS_ERR(dev)) {
|
|
err = PTR_ERR(dev);
|
|
goto out;
|
|
}
|
|
|
|
dev->ifindex = ifm->ifi_index;
|
|
|
|
if (ops->newlink) {
|
|
err = ops->newlink(link_net ? : net, dev, tb, data,
|
|
extack);
|
|
/* Drivers should call free_netdev() in ->destructor
|
|
* and unregister it on failure after registration
|
|
* so that device could be finally freed in rtnl_unlock.
|
|
*/
|
|
if (err < 0) {
|
|
/* If device is not registered at all, free it now */
|
|
if (dev->reg_state == NETREG_UNINITIALIZED)
|
|
free_netdev(dev);
|
|
goto out;
|
|
}
|
|
} else {
|
|
err = register_netdevice(dev);
|
|
if (err < 0) {
|
|
free_netdev(dev);
|
|
goto out;
|
|
}
|
|
}
|
|
err = rtnl_configure_link(dev, ifm);
|
|
if (err < 0)
|
|
goto out_unregister;
|
|
if (link_net) {
|
|
err = dev_change_net_namespace(dev, dest_net, ifname);
|
|
if (err < 0)
|
|
goto out_unregister;
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
char ifname[IFNAMSIZ];
|
|
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 = nlmsg_parse(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_IF_NETNSID]) {
|
|
netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
|
|
tgt_net = get_target_net(NETLINK_CB(skb).sk, netnsid);
|
|
if (IS_ERR(tgt_net))
|
|
return PTR_ERR(tgt_net);
|
|
}
|
|
|
|
if (tb[IFLA_IFNAME])
|
|
nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
|
|
|
|
if (tb[IFLA_EXT_MASK])
|
|
ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
|
|
|
|
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])
|
|
dev = __dev_get_by_name(tgt_net, ifname);
|
|
else
|
|
goto out;
|
|
|
|
err = -ENODEV;
|
|
if (dev == NULL)
|
|
goto out;
|
|
|
|
err = -ENOBUFS;
|
|
nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
|
|
if (nskb == NULL)
|
|
goto out;
|
|
|
|
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);
|
|
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 u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct net_device *dev;
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
u32 ext_filter_mask = 0;
|
|
u16 min_ifinfo_dump_size = 0;
|
|
int hdrlen;
|
|
|
|
/* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
|
|
hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
|
|
sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
|
|
|
|
if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
|
|
if (tb[IFLA_EXT_MASK])
|
|
ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
|
|
}
|
|
|
|
if (!ext_filter_mask)
|
|
return NLMSG_GOODSIZE;
|
|
/*
|
|
* traverse the list of net devices and compute the minimum
|
|
* buffer size based upon the filter mask.
|
|
*/
|
|
rcu_read_lock();
|
|
for_each_netdev_rcu(net, dev) {
|
|
min_ifinfo_dump_size = max_t(u16, 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;
|
|
|
|
if (s_idx == 0)
|
|
s_idx = 1;
|
|
|
|
for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
|
|
struct rtnl_link **tab;
|
|
int type = cb->nlh->nlmsg_type-RTM_BASE;
|
|
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 = 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;
|
|
}
|
|
if (dumpit(skb, cb))
|
|
break;
|
|
}
|
|
cb->family = idx;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
|
|
unsigned int change,
|
|
u32 event, gfp_t flags, int *new_nsid,
|
|
int new_ifindex)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
struct sk_buff *skb;
|
|
int err = -ENOBUFS;
|
|
size_t if_info_size;
|
|
|
|
skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
|
|
if (skb == NULL)
|
|
goto errout;
|
|
|
|
err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
|
|
type, 0, 0, change, 0, 0, event,
|
|
new_nsid, new_ifindex, -1);
|
|
if (err < 0) {
|
|
/* -EMSGSIZE implies BUG in if_nlmsg_size() */
|
|
WARN_ON(err == -EMSGSIZE);
|
|
kfree_skb(skb);
|
|
goto errout;
|
|
}
|
|
return skb;
|
|
errout:
|
|
if (err < 0)
|
|
rtnl_set_sk_err(net, RTNLGRP_LINK, err);
|
|
return NULL;
|
|
}
|
|
|
|
void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
|
|
rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
|
|
}
|
|
|
|
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)
|
|
{
|
|
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);
|
|
if (skb)
|
|
rtmsg_ifinfo_send(skb, dev, flags);
|
|
}
|
|
|
|
void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
|
|
gfp_t flags)
|
|
{
|
|
rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
|
|
NULL, 0);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
|
|
struct net_device *dev,
|
|
u8 *addr, u16 vid, u32 pid, u32 seq,
|
|
int type, unsigned int flags,
|
|
int nlflags, u16 ndm_state)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct ndmsg *ndm;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
|
|
if (!nlh)
|
|
return -EMSGSIZE;
|
|
|
|
ndm = nlmsg_data(nlh);
|
|
ndm->ndm_family = AF_BRIDGE;
|
|
ndm->ndm_pad1 = 0;
|
|
ndm->ndm_pad2 = 0;
|
|
ndm->ndm_flags = flags;
|
|
ndm->ndm_type = 0;
|
|
ndm->ndm_ifindex = dev->ifindex;
|
|
ndm->ndm_state = ndm_state;
|
|
|
|
if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
|
|
goto nla_put_failure;
|
|
if (vid)
|
|
if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
|
|
goto nla_put_failure;
|
|
|
|
nlmsg_end(skb, nlh);
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
nlmsg_cancel(skb, nlh);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static inline size_t rtnl_fdb_nlmsg_size(void)
|
|
{
|
|
return NLMSG_ALIGN(sizeof(struct ndmsg)) +
|
|
nla_total_size(ETH_ALEN) + /* 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(), GFP_ATOMIC);
|
|
if (!skb)
|
|
goto errout;
|
|
|
|
err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
|
|
0, 0, type, NTF_SELF, 0, ndm_state);
|
|
if (err < 0) {
|
|
kfree_skb(skb);
|
|
goto errout;
|
|
}
|
|
|
|
rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
|
|
return;
|
|
errout:
|
|
rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
|
|
}
|
|
|
|
/**
|
|
* ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
|
|
*/
|
|
int ndo_dflt_fdb_add(struct ndmsg *ndm,
|
|
struct nlattr *tb[],
|
|
struct net_device *dev,
|
|
const unsigned char *addr, u16 vid,
|
|
u16 flags)
|
|
{
|
|
int err = -EINVAL;
|
|
|
|
/* If aging addresses are supported device will need to
|
|
* implement its own handler for this.
|
|
*/
|
|
if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
|
|
pr_info("%s: FDB only supports static addresses\n", dev->name);
|
|
return err;
|
|
}
|
|
|
|
if (vid) {
|
|
pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
|
|
return err;
|
|
}
|
|
|
|
if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
|
|
err = dev_uc_add_excl(dev, addr);
|
|
else if (is_multicast_ether_addr(addr))
|
|
err = dev_mc_add_excl(dev, addr);
|
|
|
|
/* Only return duplicate errors if NLM_F_EXCL is set */
|
|
if (err == -EEXIST && !(flags & NLM_F_EXCL))
|
|
err = 0;
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(ndo_dflt_fdb_add);
|
|
|
|
static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
|
|
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(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;
|
|
}
|
|
|
|
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) &&
|
|
(dev->priv_flags & IFF_BRIDGE_PORT)) {
|
|
struct net_device *br_dev = netdev_master_upper_dev_get(dev);
|
|
const struct net_device_ops *ops = br_dev->netdev_ops;
|
|
|
|
err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
|
|
nlh->nlmsg_flags);
|
|
if (err)
|
|
goto out;
|
|
else
|
|
ndm->ndm_flags &= ~NTF_MASTER;
|
|
}
|
|
|
|
/* Embedded bridge, macvlan, and any other device support */
|
|
if ((ndm->ndm_flags & NTF_SELF)) {
|
|
if (dev->netdev_ops->ndo_fdb_add)
|
|
err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
|
|
vid,
|
|
nlh->nlmsg_flags);
|
|
else
|
|
err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
|
|
nlh->nlmsg_flags);
|
|
|
|
if (!err) {
|
|
rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
|
|
ndm->ndm_state);
|
|
ndm->ndm_flags &= ~NTF_SELF;
|
|
}
|
|
}
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
|
|
*/
|
|
int ndo_dflt_fdb_del(struct ndmsg *ndm,
|
|
struct nlattr *tb[],
|
|
struct net_device *dev,
|
|
const unsigned char *addr, u16 vid)
|
|
{
|
|
int err = -EINVAL;
|
|
|
|
/* If aging addresses are supported device will need to
|
|
* implement its own handler for this.
|
|
*/
|
|
if (!(ndm->ndm_state & NUD_PERMANENT)) {
|
|
pr_info("%s: FDB only supports static addresses\n", dev->name);
|
|
return err;
|
|
}
|
|
|
|
if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
|
|
err = dev_uc_del(dev, addr);
|
|
else if (is_multicast_ether_addr(addr))
|
|
err = dev_mc_del(dev, addr);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(ndo_dflt_fdb_del);
|
|
|
|
static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct ndmsg *ndm;
|
|
struct nlattr *tb[NDA_MAX+1];
|
|
struct net_device *dev;
|
|
int err = -EINVAL;
|
|
__u8 *addr;
|
|
u16 vid;
|
|
|
|
if (!netlink_capable(skb, CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, 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;
|
|
}
|
|
|
|
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) &&
|
|
(dev->priv_flags & IFF_BRIDGE_PORT)) {
|
|
struct net_device *br_dev = netdev_master_upper_dev_get(dev);
|
|
const struct net_device_ops *ops = br_dev->netdev_ops;
|
|
|
|
if (ops->ndo_fdb_del)
|
|
err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
|
|
|
|
if (err)
|
|
goto out;
|
|
else
|
|
ndm->ndm_flags &= ~NTF_MASTER;
|
|
}
|
|
|
|
/* Embedded bridge, macvlan, and any other device support */
|
|
if (ndm->ndm_flags & NTF_SELF) {
|
|
if (dev->netdev_ops->ndo_fdb_del)
|
|
err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
|
|
vid);
|
|
else
|
|
err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
|
|
|
|
if (!err) {
|
|
rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
|
|
ndm->ndm_state);
|
|
ndm->ndm_flags &= ~NTF_SELF;
|
|
}
|
|
}
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int nlmsg_populate_fdb(struct sk_buff *skb,
|
|
struct netlink_callback *cb,
|
|
struct net_device *dev,
|
|
int *idx,
|
|
struct netdev_hw_addr_list *list)
|
|
{
|
|
struct netdev_hw_addr *ha;
|
|
int err;
|
|
u32 portid, seq;
|
|
|
|
portid = NETLINK_CB(cb->skb).portid;
|
|
seq = cb->nlh->nlmsg_seq;
|
|
|
|
list_for_each_entry(ha, &list->list, list) {
|
|
if (*idx < cb->args[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.
|
|
* @nlh: netlink message header
|
|
* @dev: netdevice
|
|
*
|
|
* Default netdevice operation to dump the existing unicast address list.
|
|
* Returns number of addresses from list put in skb.
|
|
*/
|
|
int ndo_dflt_fdb_dump(struct sk_buff *skb,
|
|
struct netlink_callback *cb,
|
|
struct net_device *dev,
|
|
struct net_device *filter_dev,
|
|
int *idx)
|
|
{
|
|
int err;
|
|
|
|
netif_addr_lock_bh(dev);
|
|
err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
|
|
if (err)
|
|
goto out;
|
|
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 rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct net_device *dev;
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
struct net_device *br_dev = NULL;
|
|
const struct net_device_ops *ops = NULL;
|
|
const struct net_device_ops *cops = NULL;
|
|
struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
|
|
struct net *net = sock_net(skb->sk);
|
|
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;
|
|
|
|
err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
|
|
IFLA_MAX, ifla_policy, NULL);
|
|
if (err < 0) {
|
|
return -EINVAL;
|
|
} else if (err == 0) {
|
|
if (tb[IFLA_MASTER])
|
|
br_idx = nla_get_u32(tb[IFLA_MASTER]);
|
|
}
|
|
|
|
brport_idx = ifm->ifi_index;
|
|
|
|
if (br_idx) {
|
|
br_dev = __dev_get_by_index(net, br_idx);
|
|
if (!br_dev)
|
|
return -ENODEV;
|
|
|
|
ops = br_dev->netdev_ops;
|
|
}
|
|
|
|
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 (dev->priv_flags & IFF_BRIDGE_PORT) {
|
|
br_dev = netdev_master_upper_dev_get(dev);
|
|
cops = br_dev->netdev_ops;
|
|
}
|
|
} else {
|
|
if (dev != br_dev &&
|
|
!(dev->priv_flags & IFF_BRIDGE_PORT))
|
|
continue;
|
|
|
|
if (br_dev != netdev_master_upper_dev_get(dev) &&
|
|
!(dev->priv_flags & IFF_EBRIDGE))
|
|
continue;
|
|
cops = ops;
|
|
}
|
|
|
|
if (idx < s_idx)
|
|
goto cont;
|
|
|
|
if (dev->priv_flags & IFF_BRIDGE_PORT) {
|
|
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 brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
|
|
unsigned int attrnum, unsigned int flag)
|
|
{
|
|
if (mask & flag)
|
|
return nla_put_u8(skb, attrnum, !!(flags & flag));
|
|
return 0;
|
|
}
|
|
|
|
int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
|
|
struct net_device *dev, u16 mode,
|
|
u32 flags, u32 mask, int nlflags,
|
|
u32 filter_mask,
|
|
int (*vlan_fill)(struct sk_buff *skb,
|
|
struct net_device *dev,
|
|
u32 filter_mask))
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct ifinfomsg *ifm;
|
|
struct nlattr *br_afspec;
|
|
struct nlattr *protinfo;
|
|
u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
|
|
struct net_device *br_dev = netdev_master_upper_dev_get(dev);
|
|
int err = 0;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
|
|
if (nlh == NULL)
|
|
return -EMSGSIZE;
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
ifm->ifi_family = AF_BRIDGE;
|
|
ifm->__ifi_pad = 0;
|
|
ifm->ifi_type = dev->type;
|
|
ifm->ifi_index = dev->ifindex;
|
|
ifm->ifi_flags = dev_get_flags(dev);
|
|
ifm->ifi_change = 0;
|
|
|
|
|
|
if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
|
|
nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
|
|
nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
|
|
(br_dev &&
|
|
nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
|
|
(dev->addr_len &&
|
|
nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
|
|
(dev->ifindex != dev_get_iflink(dev) &&
|
|
nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
|
|
goto nla_put_failure;
|
|
|
|
br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
|
|
if (!br_afspec)
|
|
goto nla_put_failure;
|
|
|
|
if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
|
|
nla_nest_cancel(skb, br_afspec);
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
if (mode != BRIDGE_MODE_UNDEF) {
|
|
if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
|
|
nla_nest_cancel(skb, br_afspec);
|
|
goto nla_put_failure;
|
|
}
|
|
}
|
|
if (vlan_fill) {
|
|
err = vlan_fill(skb, dev, filter_mask);
|
|
if (err) {
|
|
nla_nest_cancel(skb, br_afspec);
|
|
goto nla_put_failure;
|
|
}
|
|
}
|
|
nla_nest_end(skb, br_afspec);
|
|
|
|
protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
|
|
if (!protinfo)
|
|
goto nla_put_failure;
|
|
|
|
if (brport_nla_put_flag(skb, flags, mask,
|
|
IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
|
|
brport_nla_put_flag(skb, flags, mask,
|
|
IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
|
|
brport_nla_put_flag(skb, flags, mask,
|
|
IFLA_BRPORT_FAST_LEAVE,
|
|
BR_MULTICAST_FAST_LEAVE) ||
|
|
brport_nla_put_flag(skb, flags, mask,
|
|
IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
|
|
brport_nla_put_flag(skb, flags, mask,
|
|
IFLA_BRPORT_LEARNING, BR_LEARNING) ||
|
|
brport_nla_put_flag(skb, flags, mask,
|
|
IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
|
|
brport_nla_put_flag(skb, flags, mask,
|
|
IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
|
|
brport_nla_put_flag(skb, flags, mask,
|
|
IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
|
|
nla_nest_cancel(skb, protinfo);
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
nla_nest_end(skb, protinfo);
|
|
|
|
nlmsg_end(skb, nlh);
|
|
return 0;
|
|
nla_put_failure:
|
|
nlmsg_cancel(skb, nlh);
|
|
return err ? err : -EMSGSIZE;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
|
|
|
|
static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct net_device *dev;
|
|
int idx = 0;
|
|
u32 portid = NETLINK_CB(cb->skb).portid;
|
|
u32 seq = cb->nlh->nlmsg_seq;
|
|
u32 filter_mask = 0;
|
|
int err;
|
|
|
|
if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
|
|
struct nlattr *extfilt;
|
|
|
|
extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
|
|
IFLA_EXT_MASK);
|
|
if (extfilt) {
|
|
if (nla_len(extfilt) < sizeof(filter_mask))
|
|
return -EINVAL;
|
|
|
|
filter_mask = nla_get_u32(extfilt);
|
|
}
|
|
}
|
|
|
|
rcu_read_lock();
|
|
for_each_netdev_rcu(net, dev) {
|
|
const struct net_device_ops *ops = dev->netdev_ops;
|
|
struct net_device *br_dev = netdev_master_upper_dev_get(dev);
|
|
|
|
if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
|
|
if (idx >= cb->args[0]) {
|
|
err = br_dev->netdev_ops->ndo_bridge_getlink(
|
|
skb, portid, seq, dev,
|
|
filter_mask, NLM_F_MULTI);
|
|
if (err < 0 && err != -EOPNOTSUPP) {
|
|
if (likely(skb->len))
|
|
break;
|
|
|
|
goto out_err;
|
|
}
|
|
}
|
|
idx++;
|
|
}
|
|
|
|
if (ops->ndo_bridge_getlink) {
|
|
if (idx >= cb->args[0]) {
|
|
err = ops->ndo_bridge_getlink(skb, portid,
|
|
seq, dev,
|
|
filter_mask,
|
|
NLM_F_MULTI);
|
|
if (err < 0 && err != -EOPNOTSUPP) {
|
|
if (likely(skb->len))
|
|
break;
|
|
|
|
goto out_err;
|
|
}
|
|
}
|
|
idx++;
|
|
}
|
|
}
|
|
err = skb->len;
|
|
out_err:
|
|
rcu_read_unlock();
|
|
cb->args[0] = idx;
|
|
|
|
return err;
|
|
}
|
|
|
|
static inline size_t bridge_nlmsg_size(void)
|
|
{
|
|
return NLMSG_ALIGN(sizeof(struct ifinfomsg))
|
|
+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
|
|
+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
|
|
+ nla_total_size(sizeof(u32)) /* IFLA_MASTER */
|
|
+ nla_total_size(sizeof(u32)) /* IFLA_MTU */
|
|
+ nla_total_size(sizeof(u32)) /* IFLA_LINK */
|
|
+ nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
|
|
+ nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
|
|
+ nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
|
|
+ nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
|
|
+ nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
|
|
}
|
|
|
|
static int rtnl_bridge_notify(struct net_device *dev)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
struct sk_buff *skb;
|
|
int err = -EOPNOTSUPP;
|
|
|
|
if (!dev->netdev_ops->ndo_bridge_getlink)
|
|
return 0;
|
|
|
|
skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
|
|
if (!skb) {
|
|
err = -ENOMEM;
|
|
goto errout;
|
|
}
|
|
|
|
err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
|
|
if (err < 0)
|
|
goto errout;
|
|
|
|
if (!skb->len)
|
|
goto errout;
|
|
|
|
rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
|
|
return 0;
|
|
errout:
|
|
WARN_ON(err == -EMSGSIZE);
|
|
kfree_skb(skb);
|
|
if (err)
|
|
rtnl_set_sk_err(net, RTNLGRP_LINK, err);
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct 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(attr, br_spec, rem) {
|
|
if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
|
|
if (nla_len(attr) < sizeof(flags))
|
|
return -EINVAL;
|
|
|
|
have_flags = true;
|
|
flags = nla_get_u16(attr);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
|
|
struct net_device *br_dev = netdev_master_upper_dev_get(dev);
|
|
|
|
if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
|
|
err = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
|
|
if (err)
|
|
goto out;
|
|
|
|
flags &= ~BRIDGE_FLAGS_MASTER;
|
|
}
|
|
|
|
if ((flags & BRIDGE_FLAGS_SELF)) {
|
|
if (!dev->netdev_ops->ndo_bridge_setlink)
|
|
err = -EOPNOTSUPP;
|
|
else
|
|
err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
|
|
flags);
|
|
if (!err) {
|
|
flags &= ~BRIDGE_FLAGS_SELF;
|
|
|
|
/* Generate event to notify upper layer of bridge
|
|
* change
|
|
*/
|
|
err = rtnl_bridge_notify(dev);
|
|
}
|
|
}
|
|
|
|
if (have_flags)
|
|
memcpy(nla_data(attr), &flags, sizeof(flags));
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct 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(attr, br_spec, rem) {
|
|
if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
|
|
if (nla_len(attr) < sizeof(flags))
|
|
return -EINVAL;
|
|
|
|
have_flags = true;
|
|
flags = nla_get_u16(attr);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
|
|
struct net_device *br_dev = netdev_master_upper_dev_get(dev);
|
|
|
|
if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
|
|
err = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
|
|
if (err)
|
|
goto out;
|
|
|
|
flags &= ~BRIDGE_FLAGS_MASTER;
|
|
}
|
|
|
|
if ((flags & BRIDGE_FLAGS_SELF)) {
|
|
if (!dev->netdev_ops->ndo_bridge_dellink)
|
|
err = -EOPNOTSUPP;
|
|
else
|
|
err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
|
|
flags);
|
|
|
|
if (!err) {
|
|
flags &= ~BRIDGE_FLAGS_SELF;
|
|
|
|
/* Generate event to notify upper layer of bridge
|
|
* change
|
|
*/
|
|
err = rtnl_bridge_notify(dev);
|
|
}
|
|
}
|
|
|
|
if (have_flags)
|
|
memcpy(nla_data(attr), &flags, sizeof(flags));
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
|
|
{
|
|
return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
|
|
(!idxattr || idxattr == attrid);
|
|
}
|
|
|
|
#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
|
|
static int rtnl_get_offload_stats_attr_size(int attr_id)
|
|
{
|
|
switch (attr_id) {
|
|
case IFLA_OFFLOAD_XSTATS_CPU_HIT:
|
|
return sizeof(struct rtnl_link_stats64);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
|
|
int *prividx)
|
|
{
|
|
struct nlattr *attr = NULL;
|
|
int attr_id, size;
|
|
void *attr_data;
|
|
int err;
|
|
|
|
if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
|
|
dev->netdev_ops->ndo_get_offload_stats))
|
|
return -ENODATA;
|
|
|
|
for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
|
|
attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
|
|
if (attr_id < *prividx)
|
|
continue;
|
|
|
|
size = rtnl_get_offload_stats_attr_size(attr_id);
|
|
if (!size)
|
|
continue;
|
|
|
|
if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
|
|
continue;
|
|
|
|
attr = nla_reserve_64bit(skb, attr_id, size,
|
|
IFLA_OFFLOAD_XSTATS_UNSPEC);
|
|
if (!attr)
|
|
goto nla_put_failure;
|
|
|
|
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)
|
|
goto get_offload_stats_failure;
|
|
}
|
|
|
|
if (!attr)
|
|
return -ENODATA;
|
|
|
|
*prividx = 0;
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
err = -EMSGSIZE;
|
|
get_offload_stats_failure:
|
|
*prividx = attr_id;
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_get_offload_stats_size(const struct net_device *dev)
|
|
{
|
|
int nla_size = 0;
|
|
int attr_id;
|
|
int size;
|
|
|
|
if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
|
|
dev->netdev_ops->ndo_get_offload_stats))
|
|
return 0;
|
|
|
|
for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
|
|
attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
|
|
if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
|
|
continue;
|
|
size = rtnl_get_offload_stats_attr_size(attr_id);
|
|
nla_size += nla_total_size_64bit(size);
|
|
}
|
|
|
|
if (nla_size != 0)
|
|
nla_size += nla_total_size(0);
|
|
|
|
return nla_size;
|
|
}
|
|
|
|
static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
|
|
int type, u32 pid, u32 seq, u32 change,
|
|
unsigned int flags, unsigned int filter_mask,
|
|
int *idxattr, int *prividx)
|
|
{
|
|
struct if_stats_msg *ifsm;
|
|
struct nlmsghdr *nlh;
|
|
struct nlattr *attr;
|
|
int s_prividx = *prividx;
|
|
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)
|
|
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(skb,
|
|
IFLA_STATS_LINK_XSTATS);
|
|
if (!attr)
|
|
goto nla_put_failure;
|
|
|
|
err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
|
|
nla_nest_end(skb, attr);
|
|
if (err)
|
|
goto nla_put_failure;
|
|
*idxattr = 0;
|
|
}
|
|
}
|
|
|
|
if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
|
|
*idxattr)) {
|
|
const struct rtnl_link_ops *ops = NULL;
|
|
const struct net_device *master;
|
|
|
|
master = netdev_master_upper_dev_get(dev);
|
|
if (master)
|
|
ops = master->rtnl_link_ops;
|
|
if (ops && ops->fill_linkxstats) {
|
|
*idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
|
|
attr = nla_nest_start(skb,
|
|
IFLA_STATS_LINK_XSTATS_SLAVE);
|
|
if (!attr)
|
|
goto nla_put_failure;
|
|
|
|
err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
|
|
nla_nest_end(skb, attr);
|
|
if (err)
|
|
goto nla_put_failure;
|
|
*idxattr = 0;
|
|
}
|
|
}
|
|
|
|
if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
|
|
*idxattr)) {
|
|
*idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
|
|
attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
|
|
if (!attr)
|
|
goto nla_put_failure;
|
|
|
|
err = rtnl_get_offload_stats(skb, dev, prividx);
|
|
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(skb, IFLA_STATS_AF_SPEC);
|
|
if (!attr)
|
|
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;
|
|
int err;
|
|
|
|
af = nla_nest_start(skb, af_ops->family);
|
|
if (!af) {
|
|
rcu_read_unlock();
|
|
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 -EMSGSIZE;
|
|
}
|
|
|
|
static size_t if_nlmsg_stats_size(const struct net_device *dev,
|
|
u32 filter_mask)
|
|
{
|
|
size_t size = 0;
|
|
|
|
if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
|
|
size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
|
|
|
|
if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
|
|
const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
|
|
int attr = IFLA_STATS_LINK_XSTATS;
|
|
|
|
if (ops && ops->get_linkxstats_size) {
|
|
size += nla_total_size(ops->get_linkxstats_size(dev,
|
|
attr));
|
|
/* for IFLA_STATS_LINK_XSTATS */
|
|
size += nla_total_size(0);
|
|
}
|
|
}
|
|
|
|
if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
|
|
struct net_device *_dev = (struct net_device *)dev;
|
|
const struct rtnl_link_ops *ops = NULL;
|
|
const struct net_device *master;
|
|
|
|
/* netdev_master_upper_dev_get can't take const */
|
|
master = netdev_master_upper_dev_get(_dev);
|
|
if (master)
|
|
ops = master->rtnl_link_ops;
|
|
if (ops && ops->get_linkxstats_size) {
|
|
int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
|
|
|
|
size += nla_total_size(ops->get_linkxstats_size(dev,
|
|
attr));
|
|
/* for IFLA_STATS_LINK_XSTATS_SLAVE */
|
|
size += nla_total_size(0);
|
|
}
|
|
}
|
|
|
|
if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
|
|
size += rtnl_get_offload_stats_size(dev);
|
|
|
|
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;
|
|
}
|
|
|
|
static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct net_device *dev = NULL;
|
|
int idxattr = 0, prividx = 0;
|
|
struct if_stats_msg *ifsm;
|
|
struct sk_buff *nskb;
|
|
u32 filter_mask;
|
|
int err;
|
|
|
|
if (nlmsg_len(nlh) < sizeof(*ifsm))
|
|
return -EINVAL;
|
|
|
|
ifsm = nlmsg_data(nlh);
|
|
if (ifsm->ifindex > 0)
|
|
dev = __dev_get_by_index(net, ifsm->ifindex);
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
filter_mask = ifsm->filter_mask;
|
|
if (!filter_mask)
|
|
return -EINVAL;
|
|
|
|
nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
|
|
if (!nskb)
|
|
return -ENOBUFS;
|
|
|
|
err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
|
|
NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
|
|
0, filter_mask, &idxattr, &prividx);
|
|
if (err < 0) {
|
|
/* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
|
|
WARN_ON(err == -EMSGSIZE);
|
|
kfree_skb(nskb);
|
|
} else {
|
|
err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
int h, s_h, err, s_idx, s_idxattr, s_prividx;
|
|
struct net *net = sock_net(skb->sk);
|
|
unsigned int flags = NLM_F_MULTI;
|
|
struct if_stats_msg *ifsm;
|
|
struct hlist_head *head;
|
|
struct net_device *dev;
|
|
u32 filter_mask = 0;
|
|
int idx = 0;
|
|
|
|
s_h = cb->args[0];
|
|
s_idx = cb->args[1];
|
|
s_idxattr = cb->args[2];
|
|
s_prividx = cb->args[3];
|
|
|
|
cb->seq = net->dev_base_seq;
|
|
|
|
if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
|
|
return -EINVAL;
|
|
|
|
ifsm = nlmsg_data(cb->nlh);
|
|
filter_mask = ifsm->filter_mask;
|
|
if (!filter_mask)
|
|
return -EINVAL;
|
|
|
|
for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
|
|
idx = 0;
|
|
head = &net->dev_index_head[h];
|
|
hlist_for_each_entry(dev, head, index_hlist) {
|
|
if (idx < s_idx)
|
|
goto cont;
|
|
err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
|
|
NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq, 0,
|
|
flags, filter_mask,
|
|
&s_idxattr, &s_prividx);
|
|
/* If we ran out of room on the first message,
|
|
* we're in trouble
|
|
*/
|
|
WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
|
|
|
|
if (err < 0)
|
|
goto out;
|
|
s_prividx = 0;
|
|
s_idxattr = 0;
|
|
nl_dump_check_consistent(cb, nlmsg_hdr(skb));
|
|
cont:
|
|
idx++;
|
|
}
|
|
}
|
|
out:
|
|
cb->args[3] = s_prividx;
|
|
cb->args[2] = s_idxattr;
|
|
cb->args[1] = idx;
|
|
cb->args[0] = h;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
/* Process one rtnetlink message. */
|
|
|
|
static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct rtnl_link *link;
|
|
struct module *owner;
|
|
int err = -EOPNOTSUPP;
|
|
rtnl_doit_func doit;
|
|
unsigned int flags;
|
|
int kind;
|
|
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 = type&3;
|
|
|
|
if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
rcu_read_lock();
|
|
if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
|
|
struct sock *rtnl;
|
|
rtnl_dumpit_func dumpit;
|
|
u16 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;
|
|
|
|
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,
|
|
};
|
|
err = netlink_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 (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);
|
|
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,
|
|
.cb_mutex = &rtnl_mutex,
|
|
.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, 0);
|
|
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_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
|
|
rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
|
|
rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, 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);
|
|
}
|