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Commit 3de23255 authored by Benjamin Thery's avatar Benjamin Thery Committed by YOSHIFUJI Hideaki
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ipv6 netns: Address labels per namespace 

This pacth makes IPv6 address labels per network namespace.
It keeps the global label tables, ip6addrlbl_table, but
adds a 'net' member to each ip6addrlbl_entry.
This new member is taken into account when matching labels.

Changelog
=========
* v1: Initial version
* v2:
  * Minize the penalty when network namespaces are not configured:
      *  the 'net' member is added only if CONFIG_NET_NS is
         defined. This saves space when network namespaces are not
         configured.
      * 'net' value is retrieved with the inlined function
         ip6addrlbl_net() that always return &init_net when
         CONFIG_NET_NS is not defined.
  * 'net' member in ip6addrlbl_entry renamed to the less generic
    'lbl_net' name (helps code search).
Signed-off-by: default avatarBenjamin Thery <benjamin.thery@bull.net>
Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
parent 2b5ead46
Hide whitespace changes
Inline Side-by-side
Showing with 84 additions and 37 deletions
include/net/addrconf.h
View file @ 3de23255
...@@ -121,7 +121,8 @@ static inline int addrconf_finite_timeout(unsigned long timeout) ...@@ -121,7 +121,8 @@ static inline int addrconf_finite_timeout(unsigned long timeout)
*/ */
extern int ipv6_addr_label_init(void); extern int ipv6_addr_label_init(void);
extern void ipv6_addr_label_rtnl_register(void); extern void ipv6_addr_label_rtnl_register(void);
extern u32 ipv6_addr_label(const struct in6_addr *addr, extern u32 ipv6_addr_label(struct net *net,
const struct in6_addr *addr,
int type, int ifindex); int type, int ifindex);
/* /*
......
net/ipv6/addrconf.c
View file @ 3de23255
...@@ -964,7 +964,8 @@ static inline int ipv6_saddr_preferred(int type) ...@@ -964,7 +964,8 @@ static inline int ipv6_saddr_preferred(int type)
return 0; return 0;
} }
static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score, static int ipv6_get_saddr_eval(struct net *net,
struct ipv6_saddr_score *score,
struct ipv6_saddr_dst *dst, struct ipv6_saddr_dst *dst,
int i) int i)
{ {
...@@ -1043,7 +1044,8 @@ static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score, ...@@ -1043,7 +1044,8 @@ static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score,
break; break;
case IPV6_SADDR_RULE_LABEL: case IPV6_SADDR_RULE_LABEL:
/* Rule 6: Prefer matching label */ /* Rule 6: Prefer matching label */
ret = ipv6_addr_label(&score->ifa->addr, score->addr_type, ret = ipv6_addr_label(net,
&score->ifa->addr, score->addr_type,
score->ifa->idev->dev->ifindex) == dst->label; score->ifa->idev->dev->ifindex) == dst->label;
break; break;
#ifdef CONFIG_IPV6_PRIVACY #ifdef CONFIG_IPV6_PRIVACY
...@@ -1097,7 +1099,7 @@ int ipv6_dev_get_saddr(struct net_device *dst_dev, ...@@ -1097,7 +1099,7 @@ int ipv6_dev_get_saddr(struct net_device *dst_dev,
dst.addr = daddr; dst.addr = daddr;
dst.ifindex = dst_dev ? dst_dev->ifindex : 0; dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
dst.scope = __ipv6_addr_src_scope(dst_type); dst.scope = __ipv6_addr_src_scope(dst_type);
dst.label = ipv6_addr_label(daddr, dst_type, dst.ifindex); dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
dst.prefs = prefs; dst.prefs = prefs;
hiscore->rule = -1; hiscore->rule = -1;
...@@ -1165,8 +1167,8 @@ int ipv6_dev_get_saddr(struct net_device *dst_dev, ...@@ -1165,8 +1167,8 @@ int ipv6_dev_get_saddr(struct net_device *dst_dev,
for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) { for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
int minihiscore, miniscore; int minihiscore, miniscore;
minihiscore = ipv6_get_saddr_eval(hiscore, &dst, i); minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
miniscore = ipv6_get_saddr_eval(score, &dst, i); miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
if (minihiscore > miniscore) { if (minihiscore > miniscore) {
if (i == IPV6_SADDR_RULE_SCOPE && if (i == IPV6_SADDR_RULE_SCOPE &&
......
net/ipv6/addrlabel.c
View file @ 3de23255
...@@ -29,6 +29,9 @@ ...@@ -29,6 +29,9 @@
*/ */
struct ip6addrlbl_entry struct ip6addrlbl_entry
{ {
#ifdef CONFIG_NET_NS
struct net *lbl_net;
#endif
struct in6_addr prefix; struct in6_addr prefix;
int prefixlen; int prefixlen;
int ifindex; int ifindex;
...@@ -46,6 +49,16 @@ static struct ip6addrlbl_table ...@@ -46,6 +49,16 @@ static struct ip6addrlbl_table
u32 seq; u32 seq;
} ip6addrlbl_table; } ip6addrlbl_table;
static inline
struct net *ip6addrlbl_net(const struct ip6addrlbl_entry *lbl)
{
#ifdef CONFIG_NET_NS
return lbl->lbl_net;
#else
return &init_net;
#endif
}
/* /*
* Default policy table (RFC3484 + extensions) * Default policy table (RFC3484 + extensions)
* *
...@@ -65,7 +78,7 @@ static struct ip6addrlbl_table ...@@ -65,7 +78,7 @@ static struct ip6addrlbl_table
#define IPV6_ADDR_LABEL_DEFAULT 0xffffffffUL #define IPV6_ADDR_LABEL_DEFAULT 0xffffffffUL
static const __initdata struct ip6addrlbl_init_table static const __net_initdata struct ip6addrlbl_init_table
{ {
const struct in6_addr *prefix; const struct in6_addr *prefix;
int prefixlen; int prefixlen;
...@@ -108,6 +121,9 @@ static const __initdata struct ip6addrlbl_init_table ...@@ -108,6 +121,9 @@ static const __initdata struct ip6addrlbl_init_table
/* Object management */ /* Object management */
static inline void ip6addrlbl_free(struct ip6addrlbl_entry *p) static inline void ip6addrlbl_free(struct ip6addrlbl_entry *p)
{ {
#ifdef CONFIG_NET_NS
release_net(p->lbl_net);
#endif
kfree(p); kfree(p);
} }
...@@ -128,10 +144,13 @@ static inline void ip6addrlbl_put(struct ip6addrlbl_entry *p) ...@@ -128,10 +144,13 @@ static inline void ip6addrlbl_put(struct ip6addrlbl_entry *p)
} }
/* Find label */ /* Find label */
static int __ip6addrlbl_match(struct ip6addrlbl_entry *p, static int __ip6addrlbl_match(struct net *net,
struct ip6addrlbl_entry *p,
const struct in6_addr *addr, const struct in6_addr *addr,
int addrtype, int ifindex) int addrtype, int ifindex)
{ {
if (!net_eq(ip6addrlbl_net(p), net))
return 0;
if (p->ifindex && p->ifindex != ifindex) if (p->ifindex && p->ifindex != ifindex)
return 0; return 0;
if (p->addrtype && p->addrtype != addrtype) if (p->addrtype && p->addrtype != addrtype)
...@@ -141,19 +160,21 @@ static int __ip6addrlbl_match(struct ip6addrlbl_entry *p, ...@@ -141,19 +160,21 @@ static int __ip6addrlbl_match(struct ip6addrlbl_entry *p,
return 1; return 1;
} }
static struct ip6addrlbl_entry *__ipv6_addr_label(const struct in6_addr *addr, static struct ip6addrlbl_entry *__ipv6_addr_label(struct net *net,
const struct in6_addr *addr,
int type, int ifindex) int type, int ifindex)
{ {
struct hlist_node *pos; struct hlist_node *pos;
struct ip6addrlbl_entry *p; struct ip6addrlbl_entry *p;
hlist_for_each_entry_rcu(p, pos, &ip6addrlbl_table.head, list) { hlist_for_each_entry_rcu(p, pos, &ip6addrlbl_table.head, list) {
if (__ip6addrlbl_match(p, addr, type, ifindex)) if (__ip6addrlbl_match(net, p, addr, type, ifindex))
return p; return p;
} }
return NULL; return NULL;
} }
u32 ipv6_addr_label(const struct in6_addr *addr, int type, int ifindex) u32 ipv6_addr_label(struct net *net,
const struct in6_addr *addr, int type, int ifindex)
{ {
u32 label; u32 label;
struct ip6addrlbl_entry *p; struct ip6addrlbl_entry *p;
...@@ -161,7 +182,7 @@ u32 ipv6_addr_label(const struct in6_addr *addr, int type, int ifindex) ...@@ -161,7 +182,7 @@ u32 ipv6_addr_label(const struct in6_addr *addr, int type, int ifindex)
type &= IPV6_ADDR_MAPPED | IPV6_ADDR_COMPATv4 | IPV6_ADDR_LOOPBACK; type &= IPV6_ADDR_MAPPED | IPV6_ADDR_COMPATv4 | IPV6_ADDR_LOOPBACK;
rcu_read_lock(); rcu_read_lock();
p = __ipv6_addr_label(addr, type, ifindex); p = __ipv6_addr_label(net, addr, type, ifindex);
label = p ? p->label : IPV6_ADDR_LABEL_DEFAULT; label = p ? p->label : IPV6_ADDR_LABEL_DEFAULT;
rcu_read_unlock(); rcu_read_unlock();
...@@ -174,7 +195,8 @@ u32 ipv6_addr_label(const struct in6_addr *addr, int type, int ifindex) ...@@ -174,7 +195,8 @@ u32 ipv6_addr_label(const struct in6_addr *addr, int type, int ifindex)
} }
/* allocate one entry */ /* allocate one entry */
static struct ip6addrlbl_entry *ip6addrlbl_alloc(const struct in6_addr *prefix, static struct ip6addrlbl_entry *ip6addrlbl_alloc(struct net *net,
const struct in6_addr *prefix,
int prefixlen, int ifindex, int prefixlen, int ifindex,
u32 label) u32 label)
{ {
...@@ -216,6 +238,9 @@ static struct ip6addrlbl_entry *ip6addrlbl_alloc(const struct in6_addr *prefix, ...@@ -216,6 +238,9 @@ static struct ip6addrlbl_entry *ip6addrlbl_alloc(const struct in6_addr *prefix,
newp->addrtype = addrtype; newp->addrtype = addrtype;
newp->label = label; newp->label = label;
INIT_HLIST_NODE(&newp->list); INIT_HLIST_NODE(&newp->list);
#ifdef CONFIG_NET_NS
newp->lbl_net = hold_net(net);
#endif
atomic_set(&newp->refcnt, 1); atomic_set(&newp->refcnt, 1);
return newp; return newp;
} }
...@@ -237,6 +262,7 @@ static int __ip6addrlbl_add(struct ip6addrlbl_entry *newp, int replace) ...@@ -237,6 +262,7 @@ static int __ip6addrlbl_add(struct ip6addrlbl_entry *newp, int replace)
hlist_for_each_entry_safe(p, pos, n, hlist_for_each_entry_safe(p, pos, n,
&ip6addrlbl_table.head, list) { &ip6addrlbl_table.head, list) {
if (p->prefixlen == newp->prefixlen && if (p->prefixlen == newp->prefixlen &&
net_eq(ip6addrlbl_net(p), ip6addrlbl_net(newp)) &&
p->ifindex == newp->ifindex && p->ifindex == newp->ifindex &&
ipv6_addr_equal(&p->prefix, &newp->prefix)) { ipv6_addr_equal(&p->prefix, &newp->prefix)) {
if (!replace) { if (!replace) {
...@@ -261,7 +287,8 @@ static int __ip6addrlbl_add(struct ip6addrlbl_entry *newp, int replace) ...@@ -261,7 +287,8 @@ static int __ip6addrlbl_add(struct ip6addrlbl_entry *newp, int replace)
} }
/* add a label */ /* add a label */
static int ip6addrlbl_add(const struct in6_addr *prefix, int prefixlen, static int ip6addrlbl_add(struct net *net,
const struct in6_addr *prefix, int prefixlen,
int ifindex, u32 label, int replace) int ifindex, u32 label, int replace)
{ {
struct ip6addrlbl_entry *newp; struct ip6addrlbl_entry *newp;
...@@ -274,7 +301,7 @@ static int ip6addrlbl_add(const struct in6_addr *prefix, int prefixlen, ...@@ -274,7 +301,7 @@ static int ip6addrlbl_add(const struct in6_addr *prefix, int prefixlen,
(unsigned int)label, (unsigned int)label,
replace); replace);
newp = ip6addrlbl_alloc(prefix, prefixlen, ifindex, label); newp = ip6addrlbl_alloc(net, prefix, prefixlen, ifindex, label);
if (IS_ERR(newp)) if (IS_ERR(newp))
return PTR_ERR(newp); return PTR_ERR(newp);
spin_lock(&ip6addrlbl_table.lock); spin_lock(&ip6addrlbl_table.lock);
...@@ -286,7 +313,8 @@ static int ip6addrlbl_add(const struct in6_addr *prefix, int prefixlen, ...@@ -286,7 +313,8 @@ static int ip6addrlbl_add(const struct in6_addr *prefix, int prefixlen,
} }
/* remove a label */ /* remove a label */
static int __ip6addrlbl_del(const struct in6_addr *prefix, int prefixlen, static int __ip6addrlbl_del(struct net *net,
const struct in6_addr *prefix, int prefixlen,
int ifindex) int ifindex)
{ {
struct ip6addrlbl_entry *p = NULL; struct ip6addrlbl_entry *p = NULL;
...@@ -300,6 +328,7 @@ static int __ip6addrlbl_del(const struct in6_addr *prefix, int prefixlen, ...@@ -300,6 +328,7 @@ static int __ip6addrlbl_del(const struct in6_addr *prefix, int prefixlen,
hlist_for_each_entry_safe(p, pos, n, &ip6addrlbl_table.head, list) { hlist_for_each_entry_safe(p, pos, n, &ip6addrlbl_table.head, list) {
if (p->prefixlen == prefixlen && if (p->prefixlen == prefixlen &&
net_eq(ip6addrlbl_net(p), net) &&
p->ifindex == ifindex && p->ifindex == ifindex &&
ipv6_addr_equal(&p->prefix, prefix)) { ipv6_addr_equal(&p->prefix, prefix)) {
hlist_del_rcu(&p->list); hlist_del_rcu(&p->list);
...@@ -311,7 +340,8 @@ static int __ip6addrlbl_del(const struct in6_addr *prefix, int prefixlen, ...@@ -311,7 +340,8 @@ static int __ip6addrlbl_del(const struct in6_addr *prefix, int prefixlen,
return ret; return ret;
} }
static int ip6addrlbl_del(const struct in6_addr *prefix, int prefixlen, static int ip6addrlbl_del(struct net *net,
const struct in6_addr *prefix, int prefixlen,
int ifindex) int ifindex)
{ {
struct in6_addr prefix_buf; struct in6_addr prefix_buf;
...@@ -324,13 +354,13 @@ static int ip6addrlbl_del(const struct in6_addr *prefix, int prefixlen, ...@@ -324,13 +354,13 @@ static int ip6addrlbl_del(const struct in6_addr *prefix, int prefixlen,
ipv6_addr_prefix(&prefix_buf, prefix, prefixlen); ipv6_addr_prefix(&prefix_buf, prefix, prefixlen);
spin_lock(&ip6addrlbl_table.lock); spin_lock(&ip6addrlbl_table.lock);
ret = __ip6addrlbl_del(&prefix_buf, prefixlen, ifindex); ret = __ip6addrlbl_del(net, &prefix_buf, prefixlen, ifindex);
spin_unlock(&ip6addrlbl_table.lock); spin_unlock(&ip6addrlbl_table.lock);
return ret; return ret;
} }
/* add default label */ /* add default label */
static __init int ip6addrlbl_init(void) static int __net_init ip6addrlbl_net_init(struct net *net)
{ {
int err = 0; int err = 0;
int i; int i;
...@@ -338,7 +368,8 @@ static __init int ip6addrlbl_init(void) ...@@ -338,7 +368,8 @@ static __init int ip6addrlbl_init(void)
ADDRLABEL(KERN_DEBUG "%s()\n", __func__); ADDRLABEL(KERN_DEBUG "%s()\n", __func__);
for (i = 0; i < ARRAY_SIZE(ip6addrlbl_init_table); i++) { for (i = 0; i < ARRAY_SIZE(ip6addrlbl_init_table); i++) {
int ret = ip6addrlbl_add(ip6addrlbl_init_table[i].prefix, int ret = ip6addrlbl_add(net,
ip6addrlbl_init_table[i].prefix,
ip6addrlbl_init_table[i].prefixlen, ip6addrlbl_init_table[i].prefixlen,
0, 0,
ip6addrlbl_init_table[i].label, 0); ip6addrlbl_init_table[i].label, 0);
...@@ -349,11 +380,32 @@ static __init int ip6addrlbl_init(void) ...@@ -349,11 +380,32 @@ static __init int ip6addrlbl_init(void)
return err; return err;
} }
static void __net_exit ip6addrlbl_net_exit(struct net *net)
{
struct ip6addrlbl_entry *p = NULL;
struct hlist_node *pos, *n;
/* Remove all labels belonging to the exiting net */
spin_lock(&ip6addrlbl_table.lock);
hlist_for_each_entry_safe(p, pos, n, &ip6addrlbl_table.head, list) {
if (net_eq(ip6addrlbl_net(p), net)) {
hlist_del_rcu(&p->list);
ip6addrlbl_put(p);
}
}
spin_unlock(&ip6addrlbl_table.lock);
}
static struct pernet_operations ipv6_addr_label_ops = {
.init = ip6addrlbl_net_init,
.exit = ip6addrlbl_net_exit,
};
int __init ipv6_addr_label_init(void) int __init ipv6_addr_label_init(void)
{ {
spin_lock_init(&ip6addrlbl_table.lock); spin_lock_init(&ip6addrlbl_table.lock);
return ip6addrlbl_init(); return register_pernet_subsys(&ipv6_addr_label_ops);
} }
static const struct nla_policy ifal_policy[IFAL_MAX+1] = { static const struct nla_policy ifal_policy[IFAL_MAX+1] = {
...@@ -371,9 +423,6 @@ static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh, ...@@ -371,9 +423,6 @@ static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh,
u32 label; u32 label;
int err = 0; int err = 0;
if (net != &init_net)
return 0;
err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy); err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy);
if (err < 0) if (err < 0)
return err; return err;
...@@ -385,7 +434,7 @@ static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh, ...@@ -385,7 +434,7 @@ static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh,
return -EINVAL; return -EINVAL;
if (ifal->ifal_index && if (ifal->ifal_index &&
!__dev_get_by_index(&init_net, ifal->ifal_index)) !__dev_get_by_index(net, ifal->ifal_index))
return -EINVAL; return -EINVAL;
if (!tb[IFAL_ADDRESS]) if (!tb[IFAL_ADDRESS])
...@@ -403,12 +452,12 @@ static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh, ...@@ -403,12 +452,12 @@ static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh,
switch(nlh->nlmsg_type) { switch(nlh->nlmsg_type) {
case RTM_NEWADDRLABEL: case RTM_NEWADDRLABEL:
err = ip6addrlbl_add(pfx, ifal->ifal_prefixlen, err = ip6addrlbl_add(net, pfx, ifal->ifal_prefixlen,
ifal->ifal_index, label, ifal->ifal_index, label,
nlh->nlmsg_flags & NLM_F_REPLACE); nlh->nlmsg_flags & NLM_F_REPLACE);
break; break;
case RTM_DELADDRLABEL: case RTM_DELADDRLABEL:
err = ip6addrlbl_del(pfx, ifal->ifal_prefixlen, err = ip6addrlbl_del(net, pfx, ifal->ifal_prefixlen,
ifal->ifal_index); ifal->ifal_index);
break; break;
default: default:
...@@ -458,12 +507,10 @@ static int ip6addrlbl_dump(struct sk_buff *skb, struct netlink_callback *cb) ...@@ -458,12 +507,10 @@ static int ip6addrlbl_dump(struct sk_buff *skb, struct netlink_callback *cb)
int idx = 0, s_idx = cb->args[0]; int idx = 0, s_idx = cb->args[0];
int err; int err;
if (net != &init_net)
return 0;
rcu_read_lock(); rcu_read_lock();
hlist_for_each_entry_rcu(p, pos, &ip6addrlbl_table.head, list) { hlist_for_each_entry_rcu(p, pos, &ip6addrlbl_table.head, list) {
if (idx >= s_idx) { if (idx >= s_idx &&
net_eq(ip6addrlbl_net(p), net)) {
if ((err = ip6addrlbl_fill(skb, p, if ((err = ip6addrlbl_fill(skb, p,
ip6addrlbl_table.seq, ip6addrlbl_table.seq,
NETLINK_CB(cb->skb).pid, NETLINK_CB(cb->skb).pid,
...@@ -499,9 +546,6 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh, ...@@ -499,9 +546,6 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh,
struct ip6addrlbl_entry *p; struct ip6addrlbl_entry *p;
struct sk_buff *skb; struct sk_buff *skb;
if (net != &init_net)
return 0;
err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy); err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy);
if (err < 0) if (err < 0)
return err; return err;
...@@ -513,7 +557,7 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh, ...@@ -513,7 +557,7 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh,
return -EINVAL; return -EINVAL;
if (ifal->ifal_index && if (ifal->ifal_index &&
!__dev_get_by_index(&init_net, ifal->ifal_index)) !__dev_get_by_index(net, ifal->ifal_index))
return -EINVAL; return -EINVAL;
if (!tb[IFAL_ADDRESS]) if (!tb[IFAL_ADDRESS])
...@@ -524,7 +568,7 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh, ...@@ -524,7 +568,7 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh,
return -EINVAL; return -EINVAL;
rcu_read_lock(); rcu_read_lock();
p = __ipv6_addr_label(addr, ipv6_addr_type(addr), ifal->ifal_index); p = __ipv6_addr_label(net, addr, ipv6_addr_type(addr), ifal->ifal_index);
if (p && ip6addrlbl_hold(p)) if (p && ip6addrlbl_hold(p))
p = NULL; p = NULL;
lseq = ip6addrlbl_table.seq; lseq = ip6addrlbl_table.seq;
...@@ -552,7 +596,7 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh, ...@@ -552,7 +596,7 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh,
goto out; goto out;
} }
err = rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).pid); err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
out: out:
return err; return err;
} }
......
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