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-rw-r--r--net/core/rtnetlink.c78
1 files changed, 67 insertions, 11 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index eca2976abb2..ae10d3740fa 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -35,6 +35,7 @@
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/security.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@@ -51,25 +52,31 @@
#include <net/pkt_sched.h>
#include <net/netlink.h>
-DECLARE_MUTEX(rtnl_sem);
+static DEFINE_MUTEX(rtnl_mutex);
void rtnl_lock(void)
{
- rtnl_shlock();
+ mutex_lock(&rtnl_mutex);
}
-int rtnl_lock_interruptible(void)
+void __rtnl_unlock(void)
{
- return down_interruptible(&rtnl_sem);
+ mutex_unlock(&rtnl_mutex);
}
-
+
void rtnl_unlock(void)
{
- rtnl_shunlock();
-
+ mutex_unlock(&rtnl_mutex);
+ if (rtnl && rtnl->sk_receive_queue.qlen)
+ rtnl->sk_data_ready(rtnl, 0);
netdev_run_todo();
}
+int rtnl_trylock(void)
+{
+ return mutex_trylock(&rtnl_mutex);
+}
+
int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len)
{
memset(tb, 0, sizeof(struct rtattr*)*maxattr);
@@ -179,6 +186,33 @@ rtattr_failure:
}
+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 int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
int type, u32 pid, u32 seq, u32 change,
unsigned int flags)
@@ -209,6 +243,13 @@ static int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
}
if (1) {
+ u8 operstate = netif_running(dev)?dev->operstate:IF_OPER_DOWN;
+ u8 link_mode = dev->link_mode;
+ RTA_PUT(skb, IFLA_OPERSTATE, sizeof(operstate), &operstate);
+ RTA_PUT(skb, IFLA_LINKMODE, sizeof(link_mode), &link_mode);
+ }
+
+ if (1) {
struct rtnl_link_ifmap map = {
.mem_start = dev->mem_start,
.mem_end = dev->mem_end,
@@ -399,6 +440,22 @@ static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
dev->weight = *((u32 *) RTA_DATA(ida[IFLA_WEIGHT - 1]));
}
+ if (ida[IFLA_OPERSTATE - 1]) {
+ if (ida[IFLA_OPERSTATE - 1]->rta_len != RTA_LENGTH(sizeof(u8)))
+ goto out;
+
+ set_operstate(dev, *((u8 *) RTA_DATA(ida[IFLA_OPERSTATE - 1])));
+ }
+
+ if (ida[IFLA_LINKMODE - 1]) {
+ if (ida[IFLA_LINKMODE - 1]->rta_len != RTA_LENGTH(sizeof(u8)))
+ goto out;
+
+ write_lock_bh(&dev_base_lock);
+ dev->link_mode = *((u8 *) RTA_DATA(ida[IFLA_LINKMODE - 1]));
+ write_unlock_bh(&dev_base_lock);
+ }
+
if (ifm->ifi_index >= 0 && ida[IFLA_IFNAME - 1]) {
char ifname[IFNAMSIZ];
@@ -575,9 +632,9 @@ static void rtnetlink_rcv(struct sock *sk, int len)
unsigned int qlen = 0;
do {
- rtnl_lock();
+ mutex_lock(&rtnl_mutex);
netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg);
- up(&rtnl_sem);
+ mutex_unlock(&rtnl_mutex);
netdev_run_todo();
} while (qlen);
@@ -654,6 +711,5 @@ EXPORT_SYMBOL(rtnetlink_links);
EXPORT_SYMBOL(rtnetlink_put_metrics);
EXPORT_SYMBOL(rtnl);
EXPORT_SYMBOL(rtnl_lock);
-EXPORT_SYMBOL(rtnl_lock_interruptible);
-EXPORT_SYMBOL(rtnl_sem);
+EXPORT_SYMBOL(rtnl_trylock);
EXPORT_SYMBOL(rtnl_unlock);