#include <linux/types.h>
#include <linux/socket.h>
#include <linux/kernel.h>
-#include <linux/major.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/string.h>
{
rtnl_shlock();
}
+
+int rtnl_lock_interruptible(void)
+{
+ return down_interruptible(&rtnl_sem);
+}
void rtnl_unlock(void)
{
struct rtnetlink_link * rtnetlink_links[NPROTO];
-static const int rtm_min[(RTM_MAX+1-RTM_BASE)/4] =
+static const int rtm_min[RTM_NR_FAMILIES] =
{
- NLMSG_LENGTH(sizeof(struct ifinfomsg)),
- NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
- NLMSG_LENGTH(sizeof(struct rtmsg)),
- NLMSG_LENGTH(sizeof(struct ndmsg)),
- NLMSG_LENGTH(sizeof(struct rtmsg)),
- NLMSG_LENGTH(sizeof(struct tcmsg)),
- NLMSG_LENGTH(sizeof(struct tcmsg)),
- NLMSG_LENGTH(sizeof(struct tcmsg)),
- NLMSG_LENGTH(sizeof(struct tcamsg))
+ [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_NEWNEIGH)] = NLMSG_LENGTH(sizeof(struct ndmsg)),
+ [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
+ [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_NEWPREFIX)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
+ [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
+ [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
};
-static const int rta_max[(RTM_MAX+1-RTM_BASE)/4] =
+static const int rta_max[RTM_NR_FAMILIES] =
{
- IFLA_MAX,
- IFA_MAX,
- RTA_MAX,
- NDA_MAX,
- RTA_MAX,
- TCA_MAX,
- TCA_MAX,
- TCA_MAX,
- TCAA_MAX
+ [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
+ [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
+ [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
+ [RTM_FAM(RTM_NEWNEIGH)] = NDA_MAX,
+ [RTM_FAM(RTM_NEWRULE)] = RTA_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,
};
void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
memcpy(RTA_DATA(rta), data, attrlen);
}
+size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size)
+{
+ size_t ret = RTA_PAYLOAD(rta);
+ char *src = RTA_DATA(rta);
+
+ if (ret > 0 && src[ret - 1] == '\0')
+ ret--;
+ if (size > 0) {
+ size_t len = (ret >= size) ? size - 1 : ret;
+ memset(dest, 0, size);
+ memcpy(dest, src, len);
+ }
+ return ret;
+}
+
int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
{
int err = 0;
return -1;
}
-int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
+static int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
{
int idx;
int s_idx = cb->args[0];
struct net_device *dev;
int err, send_addr_notify = 0;
- dev = dev_get_by_index(ifm->ifi_index);
+ if (ifm->ifi_index >= 0)
+ dev = dev_get_by_index(ifm->ifi_index);
+ else if (ida[IFLA_IFNAME - 1]) {
+ char ifname[IFNAMSIZ];
+
+ if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
+ IFNAMSIZ) >= IFNAMSIZ)
+ return -EINVAL;
+ dev = dev_get_by_name(ifname);
+ } else
+ return -EINVAL;
+
if (!dev)
return -ENODEV;
dev->weight = *((u32 *) RTA_DATA(ida[IFLA_WEIGHT - 1]));
}
- if (ida[IFLA_IFNAME - 1]) {
+ if (ifm->ifi_index >= 0 && ida[IFLA_IFNAME - 1]) {
char ifname[IFNAMSIZ];
- if (ida[IFLA_IFNAME - 1]->rta_len > RTA_LENGTH(sizeof(ifname)))
+ if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
+ IFNAMSIZ) >= IFNAMSIZ)
goto out;
-
- memset(ifname, 0, sizeof(ifname));
- memcpy(ifname, RTA_DATA(ida[IFLA_IFNAME - 1]),
- RTA_PAYLOAD(ida[IFLA_IFNAME - 1]));
- ifname[IFNAMSIZ - 1] = '\0';
-
err = dev_change_name(dev, ifname);
-
if (err)
goto out;
}
/*
* rtnetlink input queue processing routine:
- * - try to acquire shared lock. If it is failed, defer processing.
+ * - process as much as there was in the queue upon entry.
* - feed skbs to rtnetlink_rcv_skb, until it refuse a message,
- * that will occur, when a dump started and/or acquisition of
- * exclusive lock failed.
+ * that will occur, when a dump started.
*/
static void rtnetlink_rcv(struct sock *sk, int len)
{
+ unsigned int qlen = skb_queue_len(&sk->sk_receive_queue);
+
do {
struct sk_buff *skb;
- if (rtnl_shlock_nowait())
- return;
+ rtnl_lock();
+
+ if (qlen > skb_queue_len(&sk->sk_receive_queue))
+ qlen = skb_queue_len(&sk->sk_receive_queue);
- while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ for (; qlen; qlen--) {
+ skb = skb_dequeue(&sk->sk_receive_queue);
if (rtnetlink_rcv_skb(skb)) {
if (skb->len)
skb_queue_head(&sk->sk_receive_queue,
skb);
- else
+ else {
kfree_skb(skb);
+ qlen--;
+ }
break;
}
kfree_skb(skb);
up(&rtnl_sem);
netdev_run_todo();
- } while (rtnl && rtnl->sk_receive_queue.qlen);
+ } while (qlen);
}
-static struct rtnetlink_link link_rtnetlink_table[RTM_MAX-RTM_BASE+1] =
+static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] =
{
[RTM_GETLINK - RTM_BASE] = { .dumpit = rtnetlink_dump_ifinfo },
[RTM_SETLINK - RTM_BASE] = { .doit = do_setlink },
[RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
[RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add },
[RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete },
- [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info }
+ [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info },
+ [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
};
static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
}
EXPORT_SYMBOL(__rta_fill);
+EXPORT_SYMBOL(rtattr_strlcpy);
EXPORT_SYMBOL(rtattr_parse);
-EXPORT_SYMBOL(rtnetlink_dump_ifinfo);
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_unlock);
git://git.onelab.eu / linux-2.6.git / blobdiff