Commit 5f7f7502 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'IFF_NO_QUEUE-semantics' 



Jesper Dangaard Brouer says:

====================
qdisc and tx_queue_len cleanups for IFF_NO_QUEUE devices

This patchset is a cleanup for IFF_NO_QUEUE devices.  It will
hopefully help userspace get a more consistent behavior when attaching
qdisc to such virtual devices.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents fc13fd39 84c46dd8

include/net/pkt_sched.h

+2 −0
Original line number Diff line number Diff line
@@ -6,6 +6,8 @@ 
#include <linux/if_vlan.h>

#include <net/sch_generic.h>



#define DEFAULT_TX_QUEUE_LEN	1000



struct qdisc_walker {

	int	stop;

	int	skip;

net/core/dev.c

+1 −1
Original line number Diff line number Diff line
@@ -7651,7 +7651,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, 


	if (!dev->tx_queue_len) {

		dev->priv_flags |= IFF_NO_QUEUE;

		dev->tx_queue_len = 1;

		dev->tx_queue_len = DEFAULT_TX_QUEUE_LEN;

	}



	dev->num_tx_queues = txqs;

net/ethernet/eth.c

+2 −1
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ 
#include <net/dsa.h>

#include <net/flow_dissector.h>

#include <linux/uaccess.h>

#include <net/pkt_sched.h>



__setup("ether=", netdev_boot_setup);
@@ -359,7 +360,7 @@ void ether_setup(struct net_device *dev) 
	dev->min_mtu		= ETH_MIN_MTU;

	dev->max_mtu		= ETH_DATA_LEN;

	dev->addr_len		= ETH_ALEN;

	dev->tx_queue_len	= 1000;	/* Ethernet wants good queues */

	dev->tx_queue_len	= DEFAULT_TX_QUEUE_LEN;

	dev->flags		= IFF_BROADCAST|IFF_MULTICAST;

	dev->priv_flags		|= IFF_TX_SKB_SHARING;

net/sched/sch_api.c

+11 −0
Original line number Diff line number Diff line
@@ -960,6 +960,17 @@ static struct Qdisc *qdisc_create(struct net_device *dev, 


	sch->handle = handle;



	/* This exist to keep backward compatible with a userspace

	 * loophole, what allowed userspace to get IFF_NO_QUEUE

	 * facility on older kernels by setting tx_queue_len=0 (prior

	 * to qdisc init), and then forgot to reinit tx_queue_len

	 * before again attaching a qdisc.

	 */

	if ((dev->priv_flags & IFF_NO_QUEUE) && (dev->tx_queue_len == 0)) {

		dev->tx_queue_len = DEFAULT_TX_QUEUE_LEN;

		netdev_info(dev, "Caught tx_queue_len zero misconfig\n");

	}



	if (!ops->init || (err = ops->init(sch, tca[TCA_OPTIONS])) == 0) {

		if (qdisc_is_percpu_stats(sch)) {

			sch->cpu_bstats =

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