mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Rami Rosen](/assets/img/avatar_default.png)
This patch removes an unused parameter (src_net) from rtnl_create_link()
method and from the method single invocation, in veth.
This parameter was used in the past when calling
ops->get_tx_queues(src_net, tb) in rtnl_create_link().
The get_tx_queues() member of rtnl_link_ops was replaced by two methods,
get_num_tx_queues() and get_num_rx_queues(), which do not get any
parameter. This was done in commit d40156aa5e
by
Jiri Pirko ("rtnl: allow to specify different num for rx and tx queue count").
Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2656 lines
64 KiB
C
2656 lines
64 KiB
C
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* Routing netlink socket interface: protocol independent part.
|
|
*
|
|
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
* Fixes:
|
|
* Vitaly E. Lavrov RTA_OK arithmetics was wrong.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/socket.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/string.h>
|
|
#include <linux/sockios.h>
|
|
#include <linux/net.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/capability.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/init.h>
|
|
#include <linux/security.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/if_addr.h>
|
|
#include <linux/if_bridge.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/etherdevice.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
|
|
#include <linux/inet.h>
|
|
#include <linux/netdevice.h>
|
|
#include <net/ip.h>
|
|
#include <net/protocol.h>
|
|
#include <net/arp.h>
|
|
#include <net/route.h>
|
|
#include <net/udp.h>
|
|
#include <net/sock.h>
|
|
#include <net/pkt_sched.h>
|
|
#include <net/fib_rules.h>
|
|
#include <net/rtnetlink.h>
|
|
#include <net/net_namespace.h>
|
|
|
|
struct rtnl_link {
|
|
rtnl_doit_func doit;
|
|
rtnl_dumpit_func dumpit;
|
|
rtnl_calcit_func calcit;
|
|
};
|
|
|
|
static DEFINE_MUTEX(rtnl_mutex);
|
|
|
|
void rtnl_lock(void)
|
|
{
|
|
mutex_lock(&rtnl_mutex);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_lock);
|
|
|
|
void __rtnl_unlock(void)
|
|
{
|
|
mutex_unlock(&rtnl_mutex);
|
|
}
|
|
|
|
void rtnl_unlock(void)
|
|
{
|
|
/* This fellow will unlock it for us. */
|
|
netdev_run_todo();
|
|
}
|
|
EXPORT_SYMBOL(rtnl_unlock);
|
|
|
|
int rtnl_trylock(void)
|
|
{
|
|
return mutex_trylock(&rtnl_mutex);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_trylock);
|
|
|
|
int rtnl_is_locked(void)
|
|
{
|
|
return mutex_is_locked(&rtnl_mutex);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_is_locked);
|
|
|
|
#ifdef CONFIG_PROVE_LOCKING
|
|
int lockdep_rtnl_is_held(void)
|
|
{
|
|
return lockdep_is_held(&rtnl_mutex);
|
|
}
|
|
EXPORT_SYMBOL(lockdep_rtnl_is_held);
|
|
#endif /* #ifdef CONFIG_PROVE_LOCKING */
|
|
|
|
static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
|
|
|
|
static inline int rtm_msgindex(int msgtype)
|
|
{
|
|
int msgindex = msgtype - RTM_BASE;
|
|
|
|
/*
|
|
* msgindex < 0 implies someone tried to register a netlink
|
|
* control code. msgindex >= RTM_NR_MSGTYPES may indicate that
|
|
* the message type has not been added to linux/rtnetlink.h
|
|
*/
|
|
BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
|
|
|
|
return msgindex;
|
|
}
|
|
|
|
static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
|
|
{
|
|
struct rtnl_link *tab;
|
|
|
|
if (protocol <= RTNL_FAMILY_MAX)
|
|
tab = rtnl_msg_handlers[protocol];
|
|
else
|
|
tab = NULL;
|
|
|
|
if (tab == NULL || tab[msgindex].doit == NULL)
|
|
tab = rtnl_msg_handlers[PF_UNSPEC];
|
|
|
|
return tab[msgindex].doit;
|
|
}
|
|
|
|
static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
|
|
{
|
|
struct rtnl_link *tab;
|
|
|
|
if (protocol <= RTNL_FAMILY_MAX)
|
|
tab = rtnl_msg_handlers[protocol];
|
|
else
|
|
tab = NULL;
|
|
|
|
if (tab == NULL || tab[msgindex].dumpit == NULL)
|
|
tab = rtnl_msg_handlers[PF_UNSPEC];
|
|
|
|
return tab[msgindex].dumpit;
|
|
}
|
|
|
|
static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
|
|
{
|
|
struct rtnl_link *tab;
|
|
|
|
if (protocol <= RTNL_FAMILY_MAX)
|
|
tab = rtnl_msg_handlers[protocol];
|
|
else
|
|
tab = NULL;
|
|
|
|
if (tab == NULL || tab[msgindex].calcit == NULL)
|
|
tab = rtnl_msg_handlers[PF_UNSPEC];
|
|
|
|
return tab[msgindex].calcit;
|
|
}
|
|
|
|
/**
|
|
* __rtnl_register - Register a rtnetlink message type
|
|
* @protocol: Protocol family or PF_UNSPEC
|
|
* @msgtype: rtnetlink message type
|
|
* @doit: Function pointer called for each request message
|
|
* @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
|
|
* @calcit: Function pointer to calc size of dump message
|
|
*
|
|
* Registers the specified function pointers (at least one of them has
|
|
* to be non-NULL) to be called whenever a request message for the
|
|
* specified protocol family and message type is received.
|
|
*
|
|
* The special protocol family PF_UNSPEC may be used to define fallback
|
|
* function pointers for the case when no entry for the specific protocol
|
|
* family exists.
|
|
*
|
|
* Returns 0 on success or a negative error code.
|
|
*/
|
|
int __rtnl_register(int protocol, int msgtype,
|
|
rtnl_doit_func doit, rtnl_dumpit_func dumpit,
|
|
rtnl_calcit_func calcit)
|
|
{
|
|
struct rtnl_link *tab;
|
|
int msgindex;
|
|
|
|
BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
|
|
msgindex = rtm_msgindex(msgtype);
|
|
|
|
tab = rtnl_msg_handlers[protocol];
|
|
if (tab == NULL) {
|
|
tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
|
|
if (tab == NULL)
|
|
return -ENOBUFS;
|
|
|
|
rtnl_msg_handlers[protocol] = tab;
|
|
}
|
|
|
|
if (doit)
|
|
tab[msgindex].doit = doit;
|
|
|
|
if (dumpit)
|
|
tab[msgindex].dumpit = dumpit;
|
|
|
|
if (calcit)
|
|
tab[msgindex].calcit = calcit;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(__rtnl_register);
|
|
|
|
/**
|
|
* rtnl_register - Register a rtnetlink message type
|
|
*
|
|
* Identical to __rtnl_register() but panics on failure. This is useful
|
|
* as failure of this function is very unlikely, it can only happen due
|
|
* to lack of memory when allocating the chain to store all message
|
|
* handlers for a protocol. Meant for use in init functions where lack
|
|
* of memory implies no sense in continuing.
|
|
*/
|
|
void rtnl_register(int protocol, int msgtype,
|
|
rtnl_doit_func doit, rtnl_dumpit_func dumpit,
|
|
rtnl_calcit_func calcit)
|
|
{
|
|
if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
|
|
panic("Unable to register rtnetlink message handler, "
|
|
"protocol = %d, message type = %d\n",
|
|
protocol, msgtype);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtnl_register);
|
|
|
|
/**
|
|
* rtnl_unregister - Unregister a rtnetlink message type
|
|
* @protocol: Protocol family or PF_UNSPEC
|
|
* @msgtype: rtnetlink message type
|
|
*
|
|
* Returns 0 on success or a negative error code.
|
|
*/
|
|
int rtnl_unregister(int protocol, int msgtype)
|
|
{
|
|
int msgindex;
|
|
|
|
BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
|
|
msgindex = rtm_msgindex(msgtype);
|
|
|
|
if (rtnl_msg_handlers[protocol] == NULL)
|
|
return -ENOENT;
|
|
|
|
rtnl_msg_handlers[protocol][msgindex].doit = NULL;
|
|
rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtnl_unregister);
|
|
|
|
/**
|
|
* rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
|
|
* @protocol : Protocol family or PF_UNSPEC
|
|
*
|
|
* Identical to calling rtnl_unregster() for all registered message types
|
|
* of a certain protocol family.
|
|
*/
|
|
void rtnl_unregister_all(int protocol)
|
|
{
|
|
BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
|
|
|
|
kfree(rtnl_msg_handlers[protocol]);
|
|
rtnl_msg_handlers[protocol] = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtnl_unregister_all);
|
|
|
|
static LIST_HEAD(link_ops);
|
|
|
|
static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
|
|
{
|
|
const struct rtnl_link_ops *ops;
|
|
|
|
list_for_each_entry(ops, &link_ops, list) {
|
|
if (!strcmp(ops->kind, kind))
|
|
return ops;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
|
|
* @ops: struct rtnl_link_ops * to register
|
|
*
|
|
* The caller must hold the rtnl_mutex. This function should be used
|
|
* by drivers that create devices during module initialization. It
|
|
* must be called before registering the devices.
|
|
*
|
|
* Returns 0 on success or a negative error code.
|
|
*/
|
|
int __rtnl_link_register(struct rtnl_link_ops *ops)
|
|
{
|
|
if (rtnl_link_ops_get(ops->kind))
|
|
return -EEXIST;
|
|
|
|
if (!ops->dellink)
|
|
ops->dellink = unregister_netdevice_queue;
|
|
|
|
list_add_tail(&ops->list, &link_ops);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(__rtnl_link_register);
|
|
|
|
/**
|
|
* rtnl_link_register - Register rtnl_link_ops with rtnetlink.
|
|
* @ops: struct rtnl_link_ops * to register
|
|
*
|
|
* Returns 0 on success or a negative error code.
|
|
*/
|
|
int rtnl_link_register(struct rtnl_link_ops *ops)
|
|
{
|
|
int err;
|
|
|
|
rtnl_lock();
|
|
err = __rtnl_link_register(ops);
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtnl_link_register);
|
|
|
|
static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
|
|
{
|
|
struct net_device *dev;
|
|
LIST_HEAD(list_kill);
|
|
|
|
for_each_netdev(net, dev) {
|
|
if (dev->rtnl_link_ops == ops)
|
|
ops->dellink(dev, &list_kill);
|
|
}
|
|
unregister_netdevice_many(&list_kill);
|
|
}
|
|
|
|
/**
|
|
* __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
|
|
* @ops: struct rtnl_link_ops * to unregister
|
|
*
|
|
* The caller must hold the rtnl_mutex.
|
|
*/
|
|
void __rtnl_link_unregister(struct rtnl_link_ops *ops)
|
|
{
|
|
struct net *net;
|
|
|
|
for_each_net(net) {
|
|
__rtnl_kill_links(net, ops);
|
|
}
|
|
list_del(&ops->list);
|
|
}
|
|
EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
rtnl_lock();
|
|
__rtnl_link_unregister(ops);
|
|
rtnl_unlock();
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtnl_link_unregister);
|
|
|
|
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));
|
|
|
|
return size;
|
|
}
|
|
|
|
static LIST_HEAD(rtnl_af_ops);
|
|
|
|
static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
|
|
{
|
|
const struct rtnl_af_ops *ops;
|
|
|
|
list_for_each_entry(ops, &rtnl_af_ops, list) {
|
|
if (ops->family == family)
|
|
return ops;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
|
|
* @ops: struct rtnl_af_ops * to register
|
|
*
|
|
* The caller must hold the rtnl_mutex.
|
|
*
|
|
* Returns 0 on success or a negative error code.
|
|
*/
|
|
int __rtnl_af_register(struct rtnl_af_ops *ops)
|
|
{
|
|
list_add_tail(&ops->list, &rtnl_af_ops);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(__rtnl_af_register);
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
int rtnl_af_register(struct rtnl_af_ops *ops)
|
|
{
|
|
int err;
|
|
|
|
rtnl_lock();
|
|
err = __rtnl_af_register(ops);
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtnl_af_register);
|
|
|
|
/**
|
|
* __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
|
|
* @ops: struct rtnl_af_ops * to unregister
|
|
*
|
|
* The caller must hold the rtnl_mutex.
|
|
*/
|
|
void __rtnl_af_unregister(struct rtnl_af_ops *ops)
|
|
{
|
|
list_del(&ops->list);
|
|
}
|
|
EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
|
|
|
|
/**
|
|
* rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
|
|
* @ops: struct rtnl_af_ops * to unregister
|
|
*/
|
|
void rtnl_af_unregister(struct rtnl_af_ops *ops)
|
|
{
|
|
rtnl_lock();
|
|
__rtnl_af_unregister(ops);
|
|
rtnl_unlock();
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtnl_af_unregister);
|
|
|
|
static size_t rtnl_link_get_af_size(const struct net_device *dev)
|
|
{
|
|
struct rtnl_af_ops *af_ops;
|
|
size_t size;
|
|
|
|
/* IFLA_AF_SPEC */
|
|
size = nla_total_size(sizeof(struct nlattr));
|
|
|
|
list_for_each_entry(af_ops, &rtnl_af_ops, list) {
|
|
if (af_ops->get_link_af_size) {
|
|
/* AF_* + nested data */
|
|
size += nla_total_size(sizeof(struct nlattr)) +
|
|
af_ops->get_link_af_size(dev);
|
|
}
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
|
|
{
|
|
const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
|
|
struct nlattr *linkinfo, *data;
|
|
int err = -EMSGSIZE;
|
|
|
|
linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
|
|
if (linkinfo == NULL)
|
|
goto out;
|
|
|
|
if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
|
|
goto err_cancel_link;
|
|
if (ops->fill_xstats) {
|
|
err = ops->fill_xstats(skb, dev);
|
|
if (err < 0)
|
|
goto err_cancel_link;
|
|
}
|
|
if (ops->fill_info) {
|
|
data = nla_nest_start(skb, IFLA_INFO_DATA);
|
|
if (data == NULL)
|
|
goto err_cancel_link;
|
|
err = ops->fill_info(skb, dev);
|
|
if (err < 0)
|
|
goto err_cancel_data;
|
|
nla_nest_end(skb, data);
|
|
}
|
|
|
|
nla_nest_end(skb, linkinfo);
|
|
return 0;
|
|
|
|
err_cancel_data:
|
|
nla_nest_cancel(skb, data);
|
|
err_cancel_link:
|
|
nla_nest_cancel(skb, linkinfo);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static const int rtm_min[RTM_NR_FAMILIES] =
|
|
{
|
|
[RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
|
|
[RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
|
|
[RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
|
|
[RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
|
|
[RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
|
|
[RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
|
|
[RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
|
|
[RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
|
|
[RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
|
|
[RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
|
|
};
|
|
|
|
static const int rta_max[RTM_NR_FAMILIES] =
|
|
{
|
|
[RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
|
|
[RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
|
|
[RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
|
|
[RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
|
|
[RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
|
|
[RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
|
|
[RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
|
|
[RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
|
|
};
|
|
|
|
int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
|
|
{
|
|
struct sock *rtnl = net->rtnl;
|
|
int err = 0;
|
|
|
|
NETLINK_CB(skb).dst_group = group;
|
|
if (echo)
|
|
atomic_inc(&skb->users);
|
|
netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
|
|
if (echo)
|
|
err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
|
|
return err;
|
|
}
|
|
|
|
int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
|
|
{
|
|
struct sock *rtnl = net->rtnl;
|
|
|
|
return nlmsg_unicast(rtnl, skb, pid);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_unicast);
|
|
|
|
void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
|
|
struct nlmsghdr *nlh, gfp_t flags)
|
|
{
|
|
struct sock *rtnl = net->rtnl;
|
|
int report = 0;
|
|
|
|
if (nlh)
|
|
report = nlmsg_report(nlh);
|
|
|
|
nlmsg_notify(rtnl, skb, pid, group, report, flags);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_notify);
|
|
|
|
void rtnl_set_sk_err(struct net *net, u32 group, int error)
|
|
{
|
|
struct sock *rtnl = net->rtnl;
|
|
|
|
netlink_set_err(rtnl, 0, group, error);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_set_sk_err);
|
|
|
|
int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
|
|
{
|
|
struct nlattr *mx;
|
|
int i, valid = 0;
|
|
|
|
mx = nla_nest_start(skb, RTA_METRICS);
|
|
if (mx == NULL)
|
|
return -ENOBUFS;
|
|
|
|
for (i = 0; i < RTAX_MAX; i++) {
|
|
if (metrics[i]) {
|
|
valid++;
|
|
if (nla_put_u32(skb, i+1, metrics[i]))
|
|
goto nla_put_failure;
|
|
}
|
|
}
|
|
|
|
if (!valid) {
|
|
nla_nest_cancel(skb, mx);
|
|
return 0;
|
|
}
|
|
|
|
return nla_nest_end(skb, mx);
|
|
|
|
nla_put_failure:
|
|
nla_nest_cancel(skb, mx);
|
|
return -EMSGSIZE;
|
|
}
|
|
EXPORT_SYMBOL(rtnetlink_put_metrics);
|
|
|
|
int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
|
|
long expires, u32 error)
|
|
{
|
|
struct rta_cacheinfo ci = {
|
|
.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
|
|
.rta_used = dst->__use,
|
|
.rta_clntref = atomic_read(&(dst->__refcnt)),
|
|
.rta_error = error,
|
|
.rta_id = id,
|
|
};
|
|
|
|
if (expires) {
|
|
unsigned long clock;
|
|
|
|
clock = jiffies_to_clock_t(abs(expires));
|
|
clock = min_t(unsigned long, clock, INT_MAX);
|
|
ci.rta_expires = (expires > 0) ? clock : -clock;
|
|
}
|
|
return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
|
|
|
|
static void set_operstate(struct net_device *dev, unsigned char transition)
|
|
{
|
|
unsigned char operstate = dev->operstate;
|
|
|
|
switch (transition) {
|
|
case IF_OPER_UP:
|
|
if ((operstate == IF_OPER_DORMANT ||
|
|
operstate == IF_OPER_UNKNOWN) &&
|
|
!netif_dormant(dev))
|
|
operstate = IF_OPER_UP;
|
|
break;
|
|
|
|
case IF_OPER_DORMANT:
|
|
if (operstate == IF_OPER_UP ||
|
|
operstate == IF_OPER_UNKNOWN)
|
|
operstate = IF_OPER_DORMANT;
|
|
break;
|
|
}
|
|
|
|
if (dev->operstate != operstate) {
|
|
write_lock_bh(&dev_base_lock);
|
|
dev->operstate = operstate;
|
|
write_unlock_bh(&dev_base_lock);
|
|
netdev_state_change(dev);
|
|
}
|
|
}
|
|
|
|
static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
|
|
{
|
|
return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
|
|
(dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
|
|
}
|
|
|
|
static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
|
|
const struct ifinfomsg *ifm)
|
|
{
|
|
unsigned int flags = ifm->ifi_flags;
|
|
|
|
/* bugwards compatibility: ifi_change == 0 is treated as ~0 */
|
|
if (ifm->ifi_change)
|
|
flags = (flags & ifm->ifi_change) |
|
|
(rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
|
|
|
|
return flags;
|
|
}
|
|
|
|
static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
|
|
const struct rtnl_link_stats64 *b)
|
|
{
|
|
a->rx_packets = b->rx_packets;
|
|
a->tx_packets = b->tx_packets;
|
|
a->rx_bytes = b->rx_bytes;
|
|
a->tx_bytes = b->tx_bytes;
|
|
a->rx_errors = b->rx_errors;
|
|
a->tx_errors = b->tx_errors;
|
|
a->rx_dropped = b->rx_dropped;
|
|
a->tx_dropped = b->tx_dropped;
|
|
|
|
a->multicast = b->multicast;
|
|
a->collisions = b->collisions;
|
|
|
|
a->rx_length_errors = b->rx_length_errors;
|
|
a->rx_over_errors = b->rx_over_errors;
|
|
a->rx_crc_errors = b->rx_crc_errors;
|
|
a->rx_frame_errors = b->rx_frame_errors;
|
|
a->rx_fifo_errors = b->rx_fifo_errors;
|
|
a->rx_missed_errors = b->rx_missed_errors;
|
|
|
|
a->tx_aborted_errors = b->tx_aborted_errors;
|
|
a->tx_carrier_errors = b->tx_carrier_errors;
|
|
a->tx_fifo_errors = b->tx_fifo_errors;
|
|
a->tx_heartbeat_errors = b->tx_heartbeat_errors;
|
|
a->tx_window_errors = b->tx_window_errors;
|
|
|
|
a->rx_compressed = b->rx_compressed;
|
|
a->tx_compressed = b->tx_compressed;
|
|
}
|
|
|
|
static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
|
|
{
|
|
memcpy(v, b, sizeof(*b));
|
|
}
|
|
|
|
/* All VF info */
|
|
static inline int rtnl_vfinfo_size(const struct net_device *dev,
|
|
u32 ext_filter_mask)
|
|
{
|
|
if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
|
|
(ext_filter_mask & RTEXT_FILTER_VF)) {
|
|
int num_vfs = dev_num_vf(dev->dev.parent);
|
|
size_t size = nla_total_size(sizeof(struct nlattr));
|
|
size += nla_total_size(num_vfs * sizeof(struct nlattr));
|
|
size += num_vfs *
|
|
(nla_total_size(sizeof(struct ifla_vf_mac)) +
|
|
nla_total_size(sizeof(struct ifla_vf_vlan)) +
|
|
nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
|
|
nla_total_size(sizeof(struct ifla_vf_spoofchk)));
|
|
return size;
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
static size_t rtnl_port_size(const struct net_device *dev)
|
|
{
|
|
size_t port_size = nla_total_size(4) /* PORT_VF */
|
|
+ nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
|
|
+ nla_total_size(sizeof(struct ifla_port_vsi))
|
|
/* PORT_VSI_TYPE */
|
|
+ nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
|
|
+ nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
|
|
+ nla_total_size(1) /* PROT_VDP_REQUEST */
|
|
+ nla_total_size(2); /* PORT_VDP_RESPONSE */
|
|
size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
|
|
size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
|
|
+ port_size;
|
|
size_t port_self_size = nla_total_size(sizeof(struct nlattr))
|
|
+ port_size;
|
|
|
|
if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
|
|
return 0;
|
|
if (dev_num_vf(dev->dev.parent))
|
|
return port_self_size + vf_ports_size +
|
|
vf_port_size * dev_num_vf(dev->dev.parent);
|
|
else
|
|
return port_self_size;
|
|
}
|
|
|
|
static noinline size_t if_nlmsg_size(const struct net_device *dev,
|
|
u32 ext_filter_mask)
|
|
{
|
|
return NLMSG_ALIGN(sizeof(struct ifinfomsg))
|
|
+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
|
|
+ nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
|
|
+ nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
|
|
+ nla_total_size(sizeof(struct rtnl_link_ifmap))
|
|
+ nla_total_size(sizeof(struct rtnl_link_stats))
|
|
+ nla_total_size(sizeof(struct rtnl_link_stats64))
|
|
+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
|
|
+ nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
|
|
+ nla_total_size(4) /* IFLA_TXQLEN */
|
|
+ nla_total_size(4) /* IFLA_WEIGHT */
|
|
+ nla_total_size(4) /* IFLA_MTU */
|
|
+ nla_total_size(4) /* IFLA_LINK */
|
|
+ nla_total_size(4) /* IFLA_MASTER */
|
|
+ nla_total_size(4) /* IFLA_PROMISCUITY */
|
|
+ nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
|
|
+ nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
|
|
+ nla_total_size(1) /* IFLA_OPERSTATE */
|
|
+ nla_total_size(1) /* IFLA_LINKMODE */
|
|
+ nla_total_size(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) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
|
|
+ rtnl_link_get_size(dev) /* IFLA_LINKINFO */
|
|
+ rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
|
|
}
|
|
|
|
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)
|
|
{
|
|
int err;
|
|
|
|
if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
|
|
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_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
|
|
int type, u32 pid, u32 seq, u32 change,
|
|
unsigned int flags, u32 ext_filter_mask)
|
|
{
|
|
struct ifinfomsg *ifm;
|
|
struct nlmsghdr *nlh;
|
|
struct rtnl_link_stats64 temp;
|
|
const struct rtnl_link_stats64 *stats;
|
|
struct nlattr *attr, *af_spec;
|
|
struct rtnl_af_ops *af_ops;
|
|
|
|
ASSERT_RTNL();
|
|
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
|
|
if (nlh == NULL)
|
|
return -EMSGSIZE;
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
ifm->ifi_family = AF_UNSPEC;
|
|
ifm->__ifi_pad = 0;
|
|
ifm->ifi_type = dev->type;
|
|
ifm->ifi_index = dev->ifindex;
|
|
ifm->ifi_flags = dev_get_flags(dev);
|
|
ifm->ifi_change = change;
|
|
|
|
if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
|
|
nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
|
|
nla_put_u8(skb, IFLA_OPERSTATE,
|
|
netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
|
|
nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
|
|
nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
|
|
nla_put_u32(skb, IFLA_GROUP, dev->group) ||
|
|
nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
|
|
nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
|
|
#ifdef CONFIG_RPS
|
|
nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
|
|
#endif
|
|
(dev->ifindex != dev->iflink &&
|
|
nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
|
|
(dev->master &&
|
|
nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
|
|
(dev->qdisc &&
|
|
nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
|
|
(dev->ifalias &&
|
|
nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
|
|
goto nla_put_failure;
|
|
|
|
if (1) {
|
|
struct rtnl_link_ifmap map = {
|
|
.mem_start = dev->mem_start,
|
|
.mem_end = dev->mem_end,
|
|
.base_addr = dev->base_addr,
|
|
.irq = dev->irq,
|
|
.dma = dev->dma,
|
|
.port = dev->if_port,
|
|
};
|
|
if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
|
|
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;
|
|
}
|
|
|
|
attr = nla_reserve(skb, IFLA_STATS,
|
|
sizeof(struct rtnl_link_stats));
|
|
if (attr == NULL)
|
|
goto nla_put_failure;
|
|
|
|
stats = dev_get_stats(dev, &temp);
|
|
copy_rtnl_link_stats(nla_data(attr), stats);
|
|
|
|
attr = nla_reserve(skb, IFLA_STATS64,
|
|
sizeof(struct rtnl_link_stats64));
|
|
if (attr == NULL)
|
|
goto nla_put_failure;
|
|
copy_rtnl_link_stats64(nla_data(attr), stats);
|
|
|
|
if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
|
|
nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
|
|
goto nla_put_failure;
|
|
|
|
if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
|
|
&& (ext_filter_mask & RTEXT_FILTER_VF)) {
|
|
int i;
|
|
|
|
struct nlattr *vfinfo, *vf;
|
|
int num_vfs = dev_num_vf(dev->dev.parent);
|
|
|
|
vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
|
|
if (!vfinfo)
|
|
goto nla_put_failure;
|
|
for (i = 0; i < num_vfs; i++) {
|
|
struct ifla_vf_info ivi;
|
|
struct ifla_vf_mac vf_mac;
|
|
struct ifla_vf_vlan vf_vlan;
|
|
struct ifla_vf_tx_rate vf_tx_rate;
|
|
struct ifla_vf_spoofchk vf_spoofchk;
|
|
|
|
/*
|
|
* Not all SR-IOV capable drivers support the
|
|
* spoofcheck query. Preset to -1 so the user
|
|
* space tool can detect that the driver didn't
|
|
* report anything.
|
|
*/
|
|
ivi.spoofchk = -1;
|
|
if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
|
|
break;
|
|
vf_mac.vf =
|
|
vf_vlan.vf =
|
|
vf_tx_rate.vf =
|
|
vf_spoofchk.vf = ivi.vf;
|
|
|
|
memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
|
|
vf_vlan.vlan = ivi.vlan;
|
|
vf_vlan.qos = ivi.qos;
|
|
vf_tx_rate.rate = ivi.tx_rate;
|
|
vf_spoofchk.setting = ivi.spoofchk;
|
|
vf = nla_nest_start(skb, IFLA_VF_INFO);
|
|
if (!vf) {
|
|
nla_nest_cancel(skb, vfinfo);
|
|
goto nla_put_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_TX_RATE, sizeof(vf_tx_rate),
|
|
&vf_tx_rate) ||
|
|
nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
|
|
&vf_spoofchk))
|
|
goto nla_put_failure;
|
|
nla_nest_end(skb, vf);
|
|
}
|
|
nla_nest_end(skb, vfinfo);
|
|
}
|
|
|
|
if (rtnl_port_fill(skb, dev))
|
|
goto nla_put_failure;
|
|
|
|
if (dev->rtnl_link_ops) {
|
|
if (rtnl_link_fill(skb, dev) < 0)
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
|
|
goto nla_put_failure;
|
|
|
|
list_for_each_entry(af_ops, &rtnl_af_ops, list) {
|
|
if (af_ops->fill_link_af) {
|
|
struct nlattr *af;
|
|
int err;
|
|
|
|
if (!(af = nla_nest_start(skb, af_ops->family)))
|
|
goto nla_put_failure;
|
|
|
|
err = af_ops->fill_link_af(skb, dev);
|
|
|
|
/*
|
|
* Caller may return ENODATA to indicate that there
|
|
* was no data to be dumped. This is not an error, it
|
|
* means we should trim the attribute header and
|
|
* continue.
|
|
*/
|
|
if (err == -ENODATA)
|
|
nla_nest_cancel(skb, af);
|
|
else if (err < 0)
|
|
goto nla_put_failure;
|
|
|
|
nla_nest_end(skb, af);
|
|
}
|
|
}
|
|
|
|
nla_nest_end(skb, af_spec);
|
|
|
|
return nlmsg_end(skb, nlh);
|
|
|
|
nla_put_failure:
|
|
nlmsg_cancel(skb, nlh);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
int h, s_h;
|
|
int idx = 0, s_idx;
|
|
struct net_device *dev;
|
|
struct hlist_head *head;
|
|
struct hlist_node *node;
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
u32 ext_filter_mask = 0;
|
|
|
|
s_h = cb->args[0];
|
|
s_idx = cb->args[1];
|
|
|
|
rcu_read_lock();
|
|
cb->seq = net->dev_base_seq;
|
|
|
|
if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
|
|
ifla_policy) >= 0) {
|
|
|
|
if (tb[IFLA_EXT_MASK])
|
|
ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
|
|
}
|
|
|
|
for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
|
|
idx = 0;
|
|
head = &net->dev_index_head[h];
|
|
hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
|
|
if (idx < s_idx)
|
|
goto cont;
|
|
if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
|
|
NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq, 0,
|
|
NLM_F_MULTI,
|
|
ext_filter_mask) <= 0)
|
|
goto out;
|
|
|
|
nl_dump_check_consistent(cb, nlmsg_hdr(skb));
|
|
cont:
|
|
idx++;
|
|
}
|
|
}
|
|
out:
|
|
rcu_read_unlock();
|
|
cb->args[1] = idx;
|
|
cb->args[0] = h;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
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_TXQLEN] = { .type = NLA_U32 },
|
|
[IFLA_WEIGHT] = { .type = NLA_U32 },
|
|
[IFLA_OPERSTATE] = { .type = NLA_U8 },
|
|
[IFLA_LINKMODE] = { .type = NLA_U8 },
|
|
[IFLA_LINKINFO] = { .type = NLA_NESTED },
|
|
[IFLA_NET_NS_PID] = { .type = NLA_U32 },
|
|
[IFLA_NET_NS_FD] = { .type = NLA_U32 },
|
|
[IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
|
|
[IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
|
|
[IFLA_VF_PORTS] = { .type = NLA_NESTED },
|
|
[IFLA_PORT_SELF] = { .type = NLA_NESTED },
|
|
[IFLA_AF_SPEC] = { .type = NLA_NESTED },
|
|
[IFLA_EXT_MASK] = { .type = NLA_U32 },
|
|
[IFLA_PROMISCUITY] = { .type = NLA_U32 },
|
|
[IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
|
|
[IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
|
|
};
|
|
EXPORT_SYMBOL(ifla_policy);
|
|
|
|
static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
|
|
[IFLA_INFO_KIND] = { .type = NLA_STRING },
|
|
[IFLA_INFO_DATA] = { .type = NLA_NESTED },
|
|
};
|
|
|
|
static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
|
|
[IFLA_VF_INFO] = { .type = NLA_NESTED },
|
|
};
|
|
|
|
static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
|
|
[IFLA_VF_MAC] = { .type = NLA_BINARY,
|
|
.len = sizeof(struct ifla_vf_mac) },
|
|
[IFLA_VF_VLAN] = { .type = NLA_BINARY,
|
|
.len = sizeof(struct ifla_vf_vlan) },
|
|
[IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
|
|
.len = sizeof(struct ifla_vf_tx_rate) },
|
|
[IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
|
|
.len = sizeof(struct ifla_vf_spoofchk) },
|
|
};
|
|
|
|
static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
|
|
[IFLA_PORT_VF] = { .type = NLA_U32 },
|
|
[IFLA_PORT_PROFILE] = { .type = NLA_STRING,
|
|
.len = PORT_PROFILE_MAX },
|
|
[IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
|
|
.len = sizeof(struct ifla_port_vsi)},
|
|
[IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
|
|
.len = PORT_UUID_MAX },
|
|
[IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
|
|
.len = PORT_UUID_MAX },
|
|
[IFLA_PORT_REQUEST] = { .type = NLA_U8, },
|
|
[IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
|
|
};
|
|
|
|
struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
|
|
{
|
|
struct net *net;
|
|
/* Examine the link attributes and figure out which
|
|
* network namespace we are talking about.
|
|
*/
|
|
if (tb[IFLA_NET_NS_PID])
|
|
net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
|
|
else if (tb[IFLA_NET_NS_FD])
|
|
net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
|
|
else
|
|
net = get_net(src_net);
|
|
return net;
|
|
}
|
|
EXPORT_SYMBOL(rtnl_link_get_net);
|
|
|
|
static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
|
|
{
|
|
if (dev) {
|
|
if (tb[IFLA_ADDRESS] &&
|
|
nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
|
|
return -EINVAL;
|
|
|
|
if (tb[IFLA_BROADCAST] &&
|
|
nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (tb[IFLA_AF_SPEC]) {
|
|
struct nlattr *af;
|
|
int rem, err;
|
|
|
|
nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
|
|
const struct rtnl_af_ops *af_ops;
|
|
|
|
if (!(af_ops = rtnl_af_lookup(nla_type(af))))
|
|
return -EAFNOSUPPORT;
|
|
|
|
if (!af_ops->set_link_af)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (af_ops->validate_link_af) {
|
|
err = af_ops->validate_link_af(dev, af);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
|
|
{
|
|
int rem, err = -EINVAL;
|
|
struct nlattr *vf;
|
|
const struct net_device_ops *ops = dev->netdev_ops;
|
|
|
|
nla_for_each_nested(vf, attr, rem) {
|
|
switch (nla_type(vf)) {
|
|
case IFLA_VF_MAC: {
|
|
struct ifla_vf_mac *ivm;
|
|
ivm = nla_data(vf);
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_mac)
|
|
err = ops->ndo_set_vf_mac(dev, ivm->vf,
|
|
ivm->mac);
|
|
break;
|
|
}
|
|
case IFLA_VF_VLAN: {
|
|
struct ifla_vf_vlan *ivv;
|
|
ivv = nla_data(vf);
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_vlan)
|
|
err = ops->ndo_set_vf_vlan(dev, ivv->vf,
|
|
ivv->vlan,
|
|
ivv->qos);
|
|
break;
|
|
}
|
|
case IFLA_VF_TX_RATE: {
|
|
struct ifla_vf_tx_rate *ivt;
|
|
ivt = nla_data(vf);
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_tx_rate)
|
|
err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
|
|
ivt->rate);
|
|
break;
|
|
}
|
|
case IFLA_VF_SPOOFCHK: {
|
|
struct ifla_vf_spoofchk *ivs;
|
|
ivs = nla_data(vf);
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_spoofchk)
|
|
err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
|
|
ivs->setting);
|
|
break;
|
|
}
|
|
default:
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
if (err)
|
|
break;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int do_set_master(struct net_device *dev, int ifindex)
|
|
{
|
|
struct net_device *master_dev;
|
|
const struct net_device_ops *ops;
|
|
int err;
|
|
|
|
if (dev->master) {
|
|
if (dev->master->ifindex == ifindex)
|
|
return 0;
|
|
ops = dev->master->netdev_ops;
|
|
if (ops->ndo_del_slave) {
|
|
err = ops->ndo_del_slave(dev->master, dev);
|
|
if (err)
|
|
return err;
|
|
} else {
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
if (ifindex) {
|
|
master_dev = __dev_get_by_index(dev_net(dev), ifindex);
|
|
if (!master_dev)
|
|
return -EINVAL;
|
|
ops = master_dev->netdev_ops;
|
|
if (ops->ndo_add_slave) {
|
|
err = ops->ndo_add_slave(master_dev, dev);
|
|
if (err)
|
|
return err;
|
|
} else {
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
|
|
struct nlattr **tb, char *ifname, int modified)
|
|
{
|
|
const struct net_device_ops *ops = dev->netdev_ops;
|
|
int send_addr_notify = 0;
|
|
int err;
|
|
|
|
if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
|
|
struct net *net = rtnl_link_get_net(dev_net(dev), tb);
|
|
if (IS_ERR(net)) {
|
|
err = PTR_ERR(net);
|
|
goto errout;
|
|
}
|
|
if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) {
|
|
err = -EPERM;
|
|
goto errout;
|
|
}
|
|
err = dev_change_net_namespace(dev, net, ifname);
|
|
put_net(net);
|
|
if (err)
|
|
goto errout;
|
|
modified = 1;
|
|
}
|
|
|
|
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;
|
|
|
|
modified = 1;
|
|
}
|
|
|
|
if (tb[IFLA_ADDRESS]) {
|
|
struct sockaddr *sa;
|
|
int len;
|
|
|
|
if (!ops->ndo_set_mac_address) {
|
|
err = -EOPNOTSUPP;
|
|
goto errout;
|
|
}
|
|
|
|
if (!netif_device_present(dev)) {
|
|
err = -ENODEV;
|
|
goto errout;
|
|
}
|
|
|
|
len = sizeof(sa_family_t) + dev->addr_len;
|
|
sa = kmalloc(len, GFP_KERNEL);
|
|
if (!sa) {
|
|
err = -ENOMEM;
|
|
goto errout;
|
|
}
|
|
sa->sa_family = dev->type;
|
|
memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
|
|
dev->addr_len);
|
|
err = ops->ndo_set_mac_address(dev, sa);
|
|
kfree(sa);
|
|
if (err)
|
|
goto errout;
|
|
send_addr_notify = 1;
|
|
modified = 1;
|
|
add_device_randomness(dev->dev_addr, dev->addr_len);
|
|
}
|
|
|
|
if (tb[IFLA_MTU]) {
|
|
err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
|
|
if (err < 0)
|
|
goto errout;
|
|
modified = 1;
|
|
}
|
|
|
|
if (tb[IFLA_GROUP]) {
|
|
dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
|
|
modified = 1;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
modified = 1;
|
|
}
|
|
|
|
if (tb[IFLA_IFALIAS]) {
|
|
err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
|
|
nla_len(tb[IFLA_IFALIAS]));
|
|
if (err < 0)
|
|
goto errout;
|
|
modified = 1;
|
|
}
|
|
|
|
if (tb[IFLA_BROADCAST]) {
|
|
nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
|
|
send_addr_notify = 1;
|
|
}
|
|
|
|
if (ifm->ifi_flags || ifm->ifi_change) {
|
|
err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
|
|
if (err < 0)
|
|
goto errout;
|
|
}
|
|
|
|
if (tb[IFLA_MASTER]) {
|
|
err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
|
|
if (err)
|
|
goto errout;
|
|
modified = 1;
|
|
}
|
|
|
|
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]) {
|
|
write_lock_bh(&dev_base_lock);
|
|
dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
|
|
write_unlock_bh(&dev_base_lock);
|
|
}
|
|
|
|
if (tb[IFLA_VFINFO_LIST]) {
|
|
struct nlattr *attr;
|
|
int rem;
|
|
nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
|
|
if (nla_type(attr) != IFLA_VF_INFO) {
|
|
err = -EINVAL;
|
|
goto errout;
|
|
}
|
|
err = do_setvfinfo(dev, attr);
|
|
if (err < 0)
|
|
goto errout;
|
|
modified = 1;
|
|
}
|
|
}
|
|
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)
|
|
continue;
|
|
err = nla_parse_nested(port, IFLA_PORT_MAX,
|
|
attr, ifla_port_policy);
|
|
if (err < 0)
|
|
goto errout;
|
|
if (!port[IFLA_PORT_VF]) {
|
|
err = -EOPNOTSUPP;
|
|
goto errout;
|
|
}
|
|
vf = nla_get_u32(port[IFLA_PORT_VF]);
|
|
err = ops->ndo_set_vf_port(dev, vf, port);
|
|
if (err < 0)
|
|
goto errout;
|
|
modified = 1;
|
|
}
|
|
}
|
|
err = 0;
|
|
|
|
if (tb[IFLA_PORT_SELF]) {
|
|
struct nlattr *port[IFLA_PORT_MAX+1];
|
|
|
|
err = nla_parse_nested(port, IFLA_PORT_MAX,
|
|
tb[IFLA_PORT_SELF], ifla_port_policy);
|
|
if (err < 0)
|
|
goto errout;
|
|
|
|
err = -EOPNOTSUPP;
|
|
if (ops->ndo_set_vf_port)
|
|
err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
|
|
if (err < 0)
|
|
goto errout;
|
|
modified = 1;
|
|
}
|
|
|
|
if (tb[IFLA_AF_SPEC]) {
|
|
struct nlattr *af;
|
|
int rem;
|
|
|
|
nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
|
|
const struct rtnl_af_ops *af_ops;
|
|
|
|
if (!(af_ops = rtnl_af_lookup(nla_type(af))))
|
|
BUG();
|
|
|
|
err = af_ops->set_link_af(dev, af);
|
|
if (err < 0)
|
|
goto errout;
|
|
|
|
modified = 1;
|
|
}
|
|
}
|
|
err = 0;
|
|
|
|
errout:
|
|
if (err < 0 && modified)
|
|
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);
|
|
|
|
if (send_addr_notify)
|
|
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct ifinfomsg *ifm;
|
|
struct net_device *dev;
|
|
int err;
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
char ifname[IFNAMSIZ];
|
|
|
|
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
|
|
if (err < 0)
|
|
goto errout;
|
|
|
|
if (tb[IFLA_IFNAME])
|
|
nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
|
|
else
|
|
ifname[0] = '\0';
|
|
|
|
err = -EINVAL;
|
|
ifm = nlmsg_data(nlh);
|
|
if (ifm->ifi_index > 0)
|
|
dev = __dev_get_by_index(net, ifm->ifi_index);
|
|
else if (tb[IFLA_IFNAME])
|
|
dev = __dev_get_by_name(net, ifname);
|
|
else
|
|
goto errout;
|
|
|
|
if (dev == NULL) {
|
|
err = -ENODEV;
|
|
goto errout;
|
|
}
|
|
|
|
err = validate_linkmsg(dev, tb);
|
|
if (err < 0)
|
|
goto errout;
|
|
|
|
err = do_setlink(dev, ifm, tb, ifname, 0);
|
|
errout:
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
const struct rtnl_link_ops *ops;
|
|
struct net_device *dev;
|
|
struct ifinfomsg *ifm;
|
|
char ifname[IFNAMSIZ];
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
int err;
|
|
LIST_HEAD(list_kill);
|
|
|
|
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (tb[IFLA_IFNAME])
|
|
nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
if (ifm->ifi_index > 0)
|
|
dev = __dev_get_by_index(net, ifm->ifi_index);
|
|
else if (tb[IFLA_IFNAME])
|
|
dev = __dev_get_by_name(net, ifname);
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
ops = dev->rtnl_link_ops;
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
ops->dellink(dev, &list_kill);
|
|
unregister_netdevice_many(&list_kill);
|
|
list_del(&list_kill);
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
|
|
|
|
__dev_notify_flags(dev, old_flags);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(rtnl_configure_link);
|
|
|
|
struct net_device *rtnl_create_link(struct net *net,
|
|
char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
|
|
{
|
|
int err;
|
|
struct net_device *dev;
|
|
unsigned int num_tx_queues = 1;
|
|
unsigned int num_rx_queues = 1;
|
|
|
|
if (tb[IFLA_NUM_TX_QUEUES])
|
|
num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
|
|
else if (ops->get_num_tx_queues)
|
|
num_tx_queues = ops->get_num_tx_queues();
|
|
|
|
if (tb[IFLA_NUM_RX_QUEUES])
|
|
num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
|
|
else if (ops->get_num_rx_queues)
|
|
num_rx_queues = ops->get_num_rx_queues();
|
|
|
|
err = -ENOMEM;
|
|
dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
|
|
num_tx_queues, num_rx_queues);
|
|
if (!dev)
|
|
goto err;
|
|
|
|
dev_net_set(dev, net);
|
|
dev->rtnl_link_ops = ops;
|
|
dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
|
|
|
|
if (tb[IFLA_MTU])
|
|
dev->mtu = nla_get_u32(tb[IFLA_MTU]);
|
|
if (tb[IFLA_ADDRESS])
|
|
memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
|
|
nla_len(tb[IFLA_ADDRESS]));
|
|
if (tb[IFLA_BROADCAST])
|
|
memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
|
|
nla_len(tb[IFLA_BROADCAST]));
|
|
if (tb[IFLA_TXQLEN])
|
|
dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
|
|
if (tb[IFLA_OPERSTATE])
|
|
set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
|
|
if (tb[IFLA_LINKMODE])
|
|
dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
|
|
if (tb[IFLA_GROUP])
|
|
dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
|
|
|
|
return dev;
|
|
|
|
err:
|
|
return ERR_PTR(err);
|
|
}
|
|
EXPORT_SYMBOL(rtnl_create_link);
|
|
|
|
static int rtnl_group_changelink(struct net *net, int group,
|
|
struct ifinfomsg *ifm,
|
|
struct nlattr **tb)
|
|
{
|
|
struct net_device *dev;
|
|
int err;
|
|
|
|
for_each_netdev(net, dev) {
|
|
if (dev->group == group) {
|
|
err = do_setlink(dev, ifm, tb, NULL, 0);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
const struct rtnl_link_ops *ops;
|
|
struct net_device *dev;
|
|
struct ifinfomsg *ifm;
|
|
char kind[MODULE_NAME_LEN];
|
|
char ifname[IFNAMSIZ];
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
struct nlattr *linkinfo[IFLA_INFO_MAX+1];
|
|
int err;
|
|
|
|
#ifdef CONFIG_MODULES
|
|
replay:
|
|
#endif
|
|
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (tb[IFLA_IFNAME])
|
|
nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
|
|
else
|
|
ifname[0] = '\0';
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
if (ifm->ifi_index > 0)
|
|
dev = __dev_get_by_index(net, ifm->ifi_index);
|
|
else {
|
|
if (ifname[0])
|
|
dev = __dev_get_by_name(net, ifname);
|
|
else
|
|
dev = NULL;
|
|
}
|
|
|
|
err = validate_linkmsg(dev, tb);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (tb[IFLA_LINKINFO]) {
|
|
err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
|
|
tb[IFLA_LINKINFO], ifla_info_policy);
|
|
if (err < 0)
|
|
return err;
|
|
} else
|
|
memset(linkinfo, 0, sizeof(linkinfo));
|
|
|
|
if (linkinfo[IFLA_INFO_KIND]) {
|
|
nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
|
|
ops = rtnl_link_ops_get(kind);
|
|
} else {
|
|
kind[0] = '\0';
|
|
ops = NULL;
|
|
}
|
|
|
|
if (1) {
|
|
struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
|
|
struct net *dest_net;
|
|
|
|
if (ops) {
|
|
if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
|
|
err = nla_parse_nested(attr, ops->maxtype,
|
|
linkinfo[IFLA_INFO_DATA],
|
|
ops->policy);
|
|
if (err < 0)
|
|
return err;
|
|
data = attr;
|
|
}
|
|
if (ops->validate) {
|
|
err = ops->validate(tb, data);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (dev) {
|
|
int modified = 0;
|
|
|
|
if (nlh->nlmsg_flags & NLM_F_EXCL)
|
|
return -EEXIST;
|
|
if (nlh->nlmsg_flags & NLM_F_REPLACE)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (linkinfo[IFLA_INFO_DATA]) {
|
|
if (!ops || ops != dev->rtnl_link_ops ||
|
|
!ops->changelink)
|
|
return -EOPNOTSUPP;
|
|
|
|
err = ops->changelink(dev, tb, data);
|
|
if (err < 0)
|
|
return err;
|
|
modified = 1;
|
|
}
|
|
|
|
return do_setlink(dev, ifm, tb, ifname, modified);
|
|
}
|
|
|
|
if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
|
|
if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
|
|
return rtnl_group_changelink(net,
|
|
nla_get_u32(tb[IFLA_GROUP]),
|
|
ifm, tb);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!ops) {
|
|
#ifdef CONFIG_MODULES
|
|
if (kind[0]) {
|
|
__rtnl_unlock();
|
|
request_module("rtnl-link-%s", kind);
|
|
rtnl_lock();
|
|
ops = rtnl_link_ops_get(kind);
|
|
if (ops)
|
|
goto replay;
|
|
}
|
|
#endif
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (!ifname[0])
|
|
snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
|
|
|
|
dest_net = rtnl_link_get_net(net, tb);
|
|
if (IS_ERR(dest_net))
|
|
return PTR_ERR(dest_net);
|
|
|
|
dev = rtnl_create_link(dest_net, ifname, ops, tb);
|
|
if (IS_ERR(dev)) {
|
|
err = PTR_ERR(dev);
|
|
goto out;
|
|
}
|
|
|
|
dev->ifindex = ifm->ifi_index;
|
|
|
|
if (ops->newlink)
|
|
err = ops->newlink(net, dev, tb, data);
|
|
else
|
|
err = register_netdevice(dev);
|
|
|
|
if (err < 0 && !IS_ERR(dev))
|
|
free_netdev(dev);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
err = rtnl_configure_link(dev, ifm);
|
|
if (err < 0)
|
|
unregister_netdevice(dev);
|
|
out:
|
|
put_net(dest_net);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct ifinfomsg *ifm;
|
|
char ifname[IFNAMSIZ];
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
struct net_device *dev = NULL;
|
|
struct sk_buff *nskb;
|
|
int err;
|
|
u32 ext_filter_mask = 0;
|
|
|
|
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (tb[IFLA_IFNAME])
|
|
nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
|
|
|
|
if (tb[IFLA_EXT_MASK])
|
|
ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
if (ifm->ifi_index > 0)
|
|
dev = __dev_get_by_index(net, ifm->ifi_index);
|
|
else if (tb[IFLA_IFNAME])
|
|
dev = __dev_get_by_name(net, ifname);
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (dev == NULL)
|
|
return -ENODEV;
|
|
|
|
nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
|
|
if (nskb == NULL)
|
|
return -ENOBUFS;
|
|
|
|
err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
|
|
nlh->nlmsg_seq, 0, 0, ext_filter_mask);
|
|
if (err < 0) {
|
|
/* -EMSGSIZE implies BUG in if_nlmsg_size */
|
|
WARN_ON(err == -EMSGSIZE);
|
|
kfree_skb(nskb);
|
|
} else
|
|
err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
|
|
|
|
return err;
|
|
}
|
|
|
|
static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct net_device *dev;
|
|
struct nlattr *tb[IFLA_MAX+1];
|
|
u32 ext_filter_mask = 0;
|
|
u16 min_ifinfo_dump_size = 0;
|
|
|
|
if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
|
|
ifla_policy) >= 0) {
|
|
if (tb[IFLA_EXT_MASK])
|
|
ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
|
|
}
|
|
|
|
if (!ext_filter_mask)
|
|
return NLMSG_GOODSIZE;
|
|
/*
|
|
* traverse the list of net devices and compute the minimum
|
|
* buffer size based upon the filter mask.
|
|
*/
|
|
list_for_each_entry(dev, &net->dev_base_head, dev_list) {
|
|
min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
|
|
if_nlmsg_size(dev,
|
|
ext_filter_mask));
|
|
}
|
|
|
|
return min_ifinfo_dump_size;
|
|
}
|
|
|
|
static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
int idx;
|
|
int s_idx = cb->family;
|
|
|
|
if (s_idx == 0)
|
|
s_idx = 1;
|
|
for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
|
|
int type = cb->nlh->nlmsg_type-RTM_BASE;
|
|
if (idx < s_idx || idx == PF_PACKET)
|
|
continue;
|
|
if (rtnl_msg_handlers[idx] == NULL ||
|
|
rtnl_msg_handlers[idx][type].dumpit == NULL)
|
|
continue;
|
|
if (idx > s_idx)
|
|
memset(&cb->args[0], 0, sizeof(cb->args));
|
|
if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
|
|
break;
|
|
}
|
|
cb->family = idx;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
|
|
{
|
|
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)), GFP_KERNEL);
|
|
if (skb == NULL)
|
|
goto errout;
|
|
|
|
err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
|
|
if (err < 0) {
|
|
/* -EMSGSIZE implies BUG in if_nlmsg_size() */
|
|
WARN_ON(err == -EMSGSIZE);
|
|
kfree_skb(skb);
|
|
goto errout;
|
|
}
|
|
rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
|
|
return;
|
|
errout:
|
|
if (err < 0)
|
|
rtnl_set_sk_err(net, RTNLGRP_LINK, err);
|
|
}
|
|
|
|
static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
|
|
struct net_device *dev,
|
|
u8 *addr, u32 pid, u32 seq,
|
|
int type, unsigned int flags)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct ndmsg *ndm;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
|
|
if (!nlh)
|
|
return -EMSGSIZE;
|
|
|
|
ndm = nlmsg_data(nlh);
|
|
ndm->ndm_family = AF_BRIDGE;
|
|
ndm->ndm_pad1 = 0;
|
|
ndm->ndm_pad2 = 0;
|
|
ndm->ndm_flags = flags;
|
|
ndm->ndm_type = 0;
|
|
ndm->ndm_ifindex = dev->ifindex;
|
|
ndm->ndm_state = NUD_PERMANENT;
|
|
|
|
if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
|
|
goto nla_put_failure;
|
|
|
|
return nlmsg_end(skb, nlh);
|
|
|
|
nla_put_failure:
|
|
nlmsg_cancel(skb, nlh);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static inline size_t rtnl_fdb_nlmsg_size(void)
|
|
{
|
|
return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
|
|
}
|
|
|
|
static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
struct sk_buff *skb;
|
|
int err = -ENOBUFS;
|
|
|
|
skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
|
|
if (!skb)
|
|
goto errout;
|
|
|
|
err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
|
|
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);
|
|
}
|
|
|
|
static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct net_device *master = NULL;
|
|
struct ndmsg *ndm;
|
|
struct nlattr *tb[NDA_MAX+1];
|
|
struct net_device *dev;
|
|
u8 *addr;
|
|
int err;
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
ndm = nlmsg_data(nlh);
|
|
if (ndm->ndm_ifindex == 0) {
|
|
pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev = __dev_get_by_index(net, ndm->ndm_ifindex);
|
|
if (dev == NULL) {
|
|
pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
|
|
pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
addr = nla_data(tb[NDA_LLADDR]);
|
|
if (!is_valid_ether_addr(addr)) {
|
|
pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
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)) {
|
|
master = dev->master;
|
|
err = master->netdev_ops->ndo_fdb_add(ndm, tb,
|
|
dev, addr,
|
|
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) && dev->netdev_ops->ndo_fdb_add) {
|
|
err = dev->netdev_ops->ndo_fdb_add(ndm, tb,
|
|
dev, addr,
|
|
nlh->nlmsg_flags);
|
|
|
|
if (!err) {
|
|
rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
|
|
ndm->ndm_flags &= ~NTF_SELF;
|
|
}
|
|
}
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct ndmsg *ndm;
|
|
struct nlattr *llattr;
|
|
struct net_device *dev;
|
|
int err = -EINVAL;
|
|
__u8 *addr;
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (nlmsg_len(nlh) < sizeof(*ndm))
|
|
return -EINVAL;
|
|
|
|
ndm = nlmsg_data(nlh);
|
|
if (ndm->ndm_ifindex == 0) {
|
|
pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev = __dev_get_by_index(net, ndm->ndm_ifindex);
|
|
if (dev == NULL) {
|
|
pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
|
|
if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
|
|
pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
addr = nla_data(llattr);
|
|
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 *master = dev->master;
|
|
|
|
if (master->netdev_ops->ndo_fdb_del)
|
|
err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr);
|
|
|
|
if (err)
|
|
goto out;
|
|
else
|
|
ndm->ndm_flags &= ~NTF_MASTER;
|
|
}
|
|
|
|
/* Embedded bridge, macvlan, and any other device support */
|
|
if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
|
|
err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
|
|
|
|
if (!err) {
|
|
rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
|
|
ndm->ndm_flags &= ~NTF_SELF;
|
|
}
|
|
}
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int nlmsg_populate_fdb(struct sk_buff *skb,
|
|
struct netlink_callback *cb,
|
|
struct net_device *dev,
|
|
int *idx,
|
|
struct netdev_hw_addr_list *list)
|
|
{
|
|
struct netdev_hw_addr *ha;
|
|
int err;
|
|
u32 portid, seq;
|
|
|
|
portid = NETLINK_CB(cb->skb).portid;
|
|
seq = cb->nlh->nlmsg_seq;
|
|
|
|
list_for_each_entry(ha, &list->list, list) {
|
|
if (*idx < cb->args[0])
|
|
goto skip;
|
|
|
|
err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
|
|
portid, seq,
|
|
RTM_NEWNEIGH, NTF_SELF);
|
|
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 zero on success.
|
|
*/
|
|
int ndo_dflt_fdb_dump(struct sk_buff *skb,
|
|
struct netlink_callback *cb,
|
|
struct net_device *dev,
|
|
int idx)
|
|
{
|
|
int err;
|
|
|
|
netif_addr_lock_bh(dev);
|
|
err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
|
|
if (err)
|
|
goto out;
|
|
nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
|
|
out:
|
|
netif_addr_unlock_bh(dev);
|
|
return idx;
|
|
}
|
|
EXPORT_SYMBOL(ndo_dflt_fdb_dump);
|
|
|
|
static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
int idx = 0;
|
|
struct net *net = sock_net(skb->sk);
|
|
struct net_device *dev;
|
|
|
|
rcu_read_lock();
|
|
for_each_netdev_rcu(net, dev) {
|
|
if (dev->priv_flags & IFF_BRIDGE_PORT) {
|
|
struct net_device *master = dev->master;
|
|
const struct net_device_ops *ops = master->netdev_ops;
|
|
|
|
if (ops->ndo_fdb_dump)
|
|
idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
|
|
}
|
|
|
|
if (dev->netdev_ops->ndo_fdb_dump)
|
|
idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
cb->args[0] = idx;
|
|
return skb->len;
|
|
}
|
|
|
|
int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
|
|
struct net_device *dev, u16 mode)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct ifinfomsg *ifm;
|
|
struct nlattr *br_afspec;
|
|
u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
|
|
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) ||
|
|
(dev->master &&
|
|
nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
|
|
(dev->addr_len &&
|
|
nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
|
|
(dev->ifindex != dev->iflink &&
|
|
nla_put_u32(skb, IFLA_LINK, dev->iflink)))
|
|
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_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
|
|
nla_nest_cancel(skb, br_afspec);
|
|
goto nla_put_failure;
|
|
}
|
|
nla_nest_end(skb, br_afspec);
|
|
|
|
return nlmsg_end(skb, nlh);
|
|
nla_put_failure:
|
|
nlmsg_cancel(skb, nlh);
|
|
return -EMSGSIZE;
|
|
}
|
|
EXPORT_SYMBOL(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;
|
|
|
|
rcu_read_lock();
|
|
for_each_netdev_rcu(net, dev) {
|
|
const struct net_device_ops *ops = dev->netdev_ops;
|
|
struct net_device *master = dev->master;
|
|
|
|
if (master && master->netdev_ops->ndo_bridge_getlink) {
|
|
if (idx >= cb->args[0] &&
|
|
master->netdev_ops->ndo_bridge_getlink(
|
|
skb, portid, seq, dev) < 0)
|
|
break;
|
|
idx++;
|
|
}
|
|
|
|
if (ops->ndo_bridge_getlink) {
|
|
if (idx >= cb->args[0] &&
|
|
ops->ndo_bridge_getlink(skb, portid, seq, dev) < 0)
|
|
break;
|
|
idx++;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
cb->args[0] = idx;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
static inline size_t bridge_nlmsg_size(void)
|
|
{
|
|
return NLMSG_ALIGN(sizeof(struct ifinfomsg))
|
|
+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
|
|
+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
|
|
+ nla_total_size(sizeof(u32)) /* IFLA_MASTER */
|
|
+ nla_total_size(sizeof(u32)) /* IFLA_MTU */
|
|
+ nla_total_size(sizeof(u32)) /* IFLA_LINK */
|
|
+ nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
|
|
+ nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
|
|
+ nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
|
|
+ nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
|
|
+ nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
|
|
}
|
|
|
|
static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
struct net_device *master = dev->master;
|
|
struct sk_buff *skb;
|
|
int err = -EOPNOTSUPP;
|
|
|
|
skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
|
|
if (!skb) {
|
|
err = -ENOMEM;
|
|
goto errout;
|
|
}
|
|
|
|
if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
|
|
master && master->netdev_ops->ndo_bridge_getlink) {
|
|
err = master->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
|
|
if (err < 0)
|
|
goto errout;
|
|
}
|
|
|
|
if ((flags & BRIDGE_FLAGS_SELF) &&
|
|
dev->netdev_ops->ndo_bridge_getlink) {
|
|
err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
|
|
if (err < 0)
|
|
goto errout;
|
|
}
|
|
|
|
rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
|
|
return 0;
|
|
errout:
|
|
WARN_ON(err == -EMSGSIZE);
|
|
kfree_skb(skb);
|
|
rtnl_set_sk_err(net, RTNLGRP_LINK, err);
|
|
return err;
|
|
}
|
|
|
|
static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
void *arg)
|
|
{
|
|
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 oflags, flags = 0;
|
|
bool have_flags = false;
|
|
|
|
if (nlmsg_len(nlh) < sizeof(*ifm))
|
|
return -EINVAL;
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
if (ifm->ifi_family != AF_BRIDGE)
|
|
return -EPFNOSUPPORT;
|
|
|
|
dev = __dev_get_by_index(net, ifm->ifi_index);
|
|
if (!dev) {
|
|
pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
|
|
if (br_spec) {
|
|
nla_for_each_nested(attr, br_spec, rem) {
|
|
if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
|
|
have_flags = true;
|
|
flags = nla_get_u16(attr);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
oflags = flags;
|
|
|
|
if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
|
|
if (!dev->master ||
|
|
!dev->master->netdev_ops->ndo_bridge_setlink) {
|
|
err = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
err = dev->master->netdev_ops->ndo_bridge_setlink(dev, nlh);
|
|
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);
|
|
|
|
if (!err)
|
|
flags &= ~BRIDGE_FLAGS_SELF;
|
|
}
|
|
|
|
if (have_flags)
|
|
memcpy(nla_data(attr), &flags, sizeof(flags));
|
|
/* Generate event to notify upper layer of bridge change */
|
|
if (!err)
|
|
err = rtnl_bridge_notify(dev, oflags);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/* Protected by RTNL sempahore. */
|
|
static struct rtattr **rta_buf;
|
|
static int rtattr_max;
|
|
|
|
/* Process one rtnetlink message. */
|
|
|
|
static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
rtnl_doit_func doit;
|
|
int sz_idx, kind;
|
|
int min_len;
|
|
int family;
|
|
int type;
|
|
int err;
|
|
|
|
type = nlh->nlmsg_type;
|
|
if (type > RTM_MAX)
|
|
return -EOPNOTSUPP;
|
|
|
|
type -= RTM_BASE;
|
|
|
|
/* All the messages must have at least 1 byte length */
|
|
if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
|
|
return 0;
|
|
|
|
family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
|
|
sz_idx = type>>2;
|
|
kind = type&3;
|
|
|
|
if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
|
|
struct sock *rtnl;
|
|
rtnl_dumpit_func dumpit;
|
|
rtnl_calcit_func calcit;
|
|
u16 min_dump_alloc = 0;
|
|
|
|
dumpit = rtnl_get_dumpit(family, type);
|
|
if (dumpit == NULL)
|
|
return -EOPNOTSUPP;
|
|
calcit = rtnl_get_calcit(family, type);
|
|
if (calcit)
|
|
min_dump_alloc = calcit(skb, nlh);
|
|
|
|
__rtnl_unlock();
|
|
rtnl = net->rtnl;
|
|
{
|
|
struct netlink_dump_control c = {
|
|
.dump = dumpit,
|
|
.min_dump_alloc = min_dump_alloc,
|
|
};
|
|
err = netlink_dump_start(rtnl, skb, nlh, &c);
|
|
}
|
|
rtnl_lock();
|
|
return err;
|
|
}
|
|
|
|
memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
|
|
|
|
min_len = rtm_min[sz_idx];
|
|
if (nlh->nlmsg_len < min_len)
|
|
return -EINVAL;
|
|
|
|
if (nlh->nlmsg_len > min_len) {
|
|
int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
|
|
struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
|
|
|
|
while (RTA_OK(attr, attrlen)) {
|
|
unsigned int flavor = attr->rta_type;
|
|
if (flavor) {
|
|
if (flavor > rta_max[sz_idx])
|
|
return -EINVAL;
|
|
rta_buf[flavor-1] = attr;
|
|
}
|
|
attr = RTA_NEXT(attr, attrlen);
|
|
}
|
|
}
|
|
|
|
doit = rtnl_get_doit(family, type);
|
|
if (doit == NULL)
|
|
return -EOPNOTSUPP;
|
|
|
|
return doit(skb, nlh, (void *)&rta_buf[0]);
|
|
}
|
|
|
|
static void rtnetlink_rcv(struct sk_buff *skb)
|
|
{
|
|
rtnl_lock();
|
|
netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = ptr;
|
|
|
|
switch (event) {
|
|
case NETDEV_UP:
|
|
case NETDEV_DOWN:
|
|
case NETDEV_PRE_UP:
|
|
case NETDEV_POST_INIT:
|
|
case NETDEV_REGISTER:
|
|
case NETDEV_CHANGE:
|
|
case NETDEV_PRE_TYPE_CHANGE:
|
|
case NETDEV_GOING_DOWN:
|
|
case NETDEV_UNREGISTER:
|
|
case NETDEV_UNREGISTER_FINAL:
|
|
case NETDEV_RELEASE:
|
|
case NETDEV_JOIN:
|
|
break;
|
|
default:
|
|
rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
|
|
break;
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block rtnetlink_dev_notifier = {
|
|
.notifier_call = rtnetlink_event,
|
|
};
|
|
|
|
|
|
static int __net_init rtnetlink_net_init(struct net *net)
|
|
{
|
|
struct sock *sk;
|
|
struct netlink_kernel_cfg cfg = {
|
|
.groups = RTNLGRP_MAX,
|
|
.input = rtnetlink_rcv,
|
|
.cb_mutex = &rtnl_mutex,
|
|
.flags = NL_CFG_F_NONROOT_RECV,
|
|
};
|
|
|
|
sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
|
|
if (!sk)
|
|
return -ENOMEM;
|
|
net->rtnl = sk;
|
|
return 0;
|
|
}
|
|
|
|
static void __net_exit rtnetlink_net_exit(struct net *net)
|
|
{
|
|
netlink_kernel_release(net->rtnl);
|
|
net->rtnl = NULL;
|
|
}
|
|
|
|
static struct pernet_operations rtnetlink_net_ops = {
|
|
.init = rtnetlink_net_init,
|
|
.exit = rtnetlink_net_exit,
|
|
};
|
|
|
|
void __init rtnetlink_init(void)
|
|
{
|
|
int i;
|
|
|
|
rtattr_max = 0;
|
|
for (i = 0; i < ARRAY_SIZE(rta_max); i++)
|
|
if (rta_max[i] > rtattr_max)
|
|
rtattr_max = rta_max[i];
|
|
rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
|
|
if (!rta_buf)
|
|
panic("rtnetlink_init: cannot allocate rta_buf\n");
|
|
|
|
if (register_pernet_subsys(&rtnetlink_net_ops))
|
|
panic("rtnetlink_init: cannot initialize rtnetlink\n");
|
|
|
|
register_netdevice_notifier(&rtnetlink_dev_notifier);
|
|
|
|
rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
|
|
rtnl_dump_ifinfo, rtnl_calcit);
|
|
rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
|
|
rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
|
|
rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
|
|
|
|
rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
|
|
rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
|
|
|
|
rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
|
|
rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
|
|
rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
|
|
|
|
rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
|
|
rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
|
|
}
|
|
|