leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

net: introduce NETDEV_CHANGE_TX_QUEUE_LEN

Browse Source 
This patch introduces a new event - NETDEV_CHANGE_TX_QUEUE_LEN, this
will be triggered when tx_queue_len. It could be used by net device
who want to do some processing at that time. An example is tun who may
want to resize tx array when tx_queue_len is changed.

Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason Wang
2016-06-30 14:45:35 +08:00
committed by David S. Miller
parent bf900b3dbe
commit 08294a26e1
3 changed files with 26 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
net/core/rtnetlink.c
View File

@@ -1927,11 +1927,19 @@ static int do_setlink(const struct sk_buff *skb,
if (tb[IFLA_TXQLEN]) {
unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
unsigned long orig_len = dev->tx_queue_len;
if (dev->tx_queue_len ^ value)
if (dev->tx_queue_len ^ value) {
dev->tx_queue_len = value;
err = call_netdevice_notifiers(
NETDEV_CHANGE_TX_QUEUE_LEN, dev);
err = notifier_to_errno(err);
if (err) {
dev->tx_queue_len = orig_len;
goto errout;
}
status |= DO_SETLINK_NOTIFY;
dev->tx_queue_len = value;
}
}
if (tb[IFLA_OPERSTATE])