linux-toradex.git/include/linux/netdevice.h, branch v2.6.33.1

netdevice.h: check for CONFIG_WLAN instead of CONFIG_WLAN_80211

2010-03-15T16:06:35+00:00

commit caf66e581172dc5032bb84841a91bc7b77ad9876 upstream.

In "wireless: remove WLAN_80211 and WLAN_PRE80211 from Kconfig" I
inadvertantly missed a line in include/linux/netdevice.h.  I thereby
effectively reverted "net: Set LL_MAX_HEADER properly for wireless." by
accident. :-(  Now we should check there for CONFIG_WLAN instead.

Signed-off-by: John W. Linville 
Reported-by: Christoph Egger 
Signed-off-by: Greg Kroah-Hartman

netdevice: provide common routine for macvlan and vlan operstate management

2009-12-03T23:59:22+00:00

Provide common routine for the transition of operational state for a leaf
device during a root device transition.

Signed-off-by: Patrick Mullaney 
Acked-by: Arnd Bergmann 
Acked-by: Patrick McHardy 
Signed-off-by: David S. Miller

net: Implement for_each_netdev_reverse.

2009-12-02T00:15:50+00:00

I will need this shortly to implement network namespace shutdown
batching.  For sanity sake network devices should be removed in
the reverse order they were created in.

Signed-off-by: Eric W. Biederman 
Signed-off-by: David S. Miller

veth: move loopback logic to common location

2009-11-26T23:52:58+00:00

The veth driver contains code to forward an skb
from the start_xmit function of one network
device into the receive path of another device.

Moving that code into a common location lets us
reuse the code for direct forwarding of data
between macvlan ports, and possibly in other
drivers.

Signed-off-by: Arnd Bergmann 
Acked-by: Patrick McHardy 
Signed-off-by: David S. Miller

linkwatch: linkwatch_forget_dev() to speedup device dismantle

2009-11-18T13:03:11+00:00

Herbert Xu a écrit :
> On Tue, Nov 17, 2009 at 04:26:04AM -0800, David Miller wrote:
>> Really, the link watch stuff is just due for a redesign.  I don't
>> think a simple hack is going to cut it this time, sorry Eric :-)
>
> I have no objections against any redesigns, but since the only
> caller of linkwatch_forget_dev runs in process context with the
> RTNL, it could also legally emit those events.

Thanks guys, here an updated version then, before linkwatch surgery ?

In this version, I force the event to be sent synchronously.

[PATCH net-next-2.6] linkwatch: linkwatch_forget_dev() to speedup device dismantle

time ip link del eth3.103 ; time ip link del eth3.104 ; time ip link del eth3.105

real	0m0.266s
user	0m0.000s
sys	0m0.001s

real	0m0.770s
user	0m0.000s
sys	0m0.000s

real	0m1.022s
user	0m0.000s
sys	0m0.000s

One problem of current schem in vlan dismantle phase is the
holding of device done by following chain :

vlan_dev_stop() ->
	netif_carrier_off(dev) ->
		linkwatch_fire_event(dev) ->
			dev_hold() ...

And __linkwatch_run_queue() runs up to one second later...

A generic fix to this problem is to add a linkwatch_forget_dev() method
to unlink the device from the list of watched devices.

dev->link_watch_next becomes dev->link_watch_list (and use a bit more memory),
to be able to unlink device in O(1).

After patch :
time ip link del eth3.103 ; time ip link del eth3.104 ; time ip link del eth3.105

real    0m0.024s
user    0m0.000s
sys     0m0.000s

real    0m0.032s
user    0m0.000s
sys     0m0.001s

real    0m0.033s
user    0m0.000s
sys     0m0.000s

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

net: add dev_txq_stats_fold() helper

2009-11-18T07:51:52+00:00

Some drivers ndo_get_stats() method need to perform txqueue stats folding.

Move folding from dev_get_stats() to a new dev_txq_stats_fold() function

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

net: Optimize hard_start_xmit() return checking

2009-11-16T06:08:33+00:00

Recent changes in the TX error propagation require additional checking
and masking of values returned from hard_start_xmit(), mainly to
separate cases where skb was consumed. This aim can be simplified by
changing the order of NETDEV_TX and NET_XMIT codes, because the latter
are treated similarly to negative (ERRNO) values.

After this change much simpler dev_xmit_complete() is also used in
sch_direct_xmit(), so it is moved to netdevice.h.

Additionally NET_RX definitions in netdevice.h are moved up from
between TX codes to avoid confusion while reading the TX comment.

Signed-off-by: Jarek Poplawski 
Signed-off-by: David S. Miller

ipv6: use RCU to walk list of network devices

2009-11-14T04:38:49+00:00

No longer need read_lock(&dev_base_lock), use RCU instead.
We also can avoid taking references on inet6_dev structs.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

net: allow to propagate errors through ->ndo_hard_start_xmit()

2009-11-13T22:07:32+00:00

Currently the ->ndo_hard_start_xmit() callbacks are only permitted to return
one of the NETDEV_TX codes. This prevents any kind of error propagation for
virtual devices, like queue congestion of the underlying device in case of
layered devices, or unreachability in case of tunnels.

This patches changes the NET_XMIT codes to avoid clashes with the NETDEV_TX
codes and changes the two callers of dev_hard_start_xmit() to expect either
errno codes, NET_XMIT codes or NETDEV_TX codes as return value.

In case of qdisc_restart(), all non NETDEV_TX codes are mapped to NETDEV_TX_OK
since no error propagation is possible when using qdiscs. In case of
dev_queue_xmit(), the error is propagated upwards.

Signed-off-by: Patrick McHardy 
Signed-off-by: David S. Miller

netdev: add netdev_continue_rcu

2009-11-11T06:26:29+00:00

This adds an RCU macro for continuing search, useful for some
network devices like vlan.

Signed-off-by: Stephen Hemminger 
Acked-by: Eric Dumazet 
Signed-off-by: David S. Miller