linux-toradex.git/include/linux/netdevice.h, branch v3.14.3

net: Account for all vlan headers in skb_mac_gso_segment

2014-03-28T21:10:36+00:00

skb_network_protocol() already accounts for multiple vlan
headers that may be present in the skb.  However, skb_mac_gso_segment()
doesn't know anything about it and assumes that skb->mac_len
is set correctly to skip all mac headers.  That may not
always be the case.  If we are simply forwarding the packet (via
bridge or macvtap), all vlan headers may not be accounted for.

A simple solution is to allow skb_network_protocol to return
the vlan depth it has calculated.  This way skb_mac_gso_segment
will correctly skip all mac headers.

Signed-off-by: Vlad Yasevich 
Signed-off-by: David S. Miller

netdevice: move netdev_cap_txqueue for shared usage to header

2014-02-17T05:36:34+00:00

In order to allow users to invoke netdev_cap_txqueue, it needs to
be moved into netdevice.h header file. While at it, also add kernel
doc header to document the API.

Signed-off-by: Daniel Borkmann 
Signed-off-by: David S. Miller

netdevice: add queue selection fallback handler for ndo_select_queue

2014-02-17T05:36:34+00:00

Add a new argument for ndo_select_queue() callback that passes a
fallback handler. This gets invoked through netdev_pick_tx();
fallback handler is currently __netdev_pick_tx() as most drivers
invoke this function within their customized implementation in
case for skbs that don't need any special handling. This fallback
handler can then be replaced on other call-sites with different
queue selection methods (e.g. in packet sockets, pktgen etc).

This also has the nice side-effect that __netdev_pick_tx() is
then only invoked from netdev_pick_tx() and export of that
function to modules can be undone.

Suggested-by: David S. Miller 
Signed-off-by: Daniel Borkmann 
Signed-off-by: David S. Miller

net: core: introduce netif_skb_dev_features

2014-02-13T22:17:02+00:00

Will be used by upcoming ipv4 forward path change that needs to
determine feature mask using skb->dst->dev instead of skb->dev.

Signed-off-by: Florian Westphal 
Signed-off-by: David S. Miller

rtnetlink: remove ndo_get_slave

2014-01-23T05:57:17+00:00

No longer used API bond-specific can be removed now. This is now handled
in a generic way in rtnl_link_ops.

Signed-off-by: Jiri Pirko 
Signed-off-by: David S. Miller

net: Add GRO support for UDP encapsulating protocols

2014-01-22T02:05:04+00:00

Add GRO handlers for protocols that do UDP encapsulation, with the intent of
being able to coalesce packets which encapsulate packets belonging to
the same TCP session.

For GRO purposes, the destination UDP port takes the role of the ether type
field in the ethernet header or the next protocol in the IP header.

The UDP GRO handler will only attempt to coalesce packets whose destination
port is registered to have gro handler.

Use a mark on the skb GRO CB data to disallow (flush) running the udp gro receive
code twice on a packet. This solves the problem of udp encapsulated packets whose
inner VM packet is udp and happen to carry a port which has registered offloads.

Signed-off-by: Shlomo Pongratz 
Signed-off-by: Or Gerlitz 
Signed-off-by: David S. Miller

bonding: add netlink attributes to slave link dev

2014-01-18T02:51:58+00:00

If link is IFF_SLAVE, extend link dev netlink attributes to include
slave attributes with new IFLA_SLAVE nest.  Add netlink notification
(RTM_NEWLINK) when slave status changes from backup to active, or
visa-versa.

Adds new ndo_get_slave op to net_device_ops to fill skb with IFLA_SLAVE
attributes.  Currently only used by bonding driver, but could be
used by other aggregating devices with slaves.

Signed-off-by: Scott Feldman 
Signed-off-by: David S. Miller

net-sysfs: add support for device-specific rx queue sysfs attributes

2014-01-17T07:46:06+00:00

Extend existing support for netdevice receive queue sysfs attributes to
permit a device-specific attribute group. Initial use case for this
support will be to allow the virtio-net device to export per-receive
queue mergeable receive buffer size.

Signed-off-by: Michael Dalton 
Signed-off-by: David S. Miller

net: add NETDEV_PRECHANGEMTU to notify before mtu change happens

2014-01-17T01:15:41+00:00

Currently, if a device changes its mtu, first the change happens (invloving
all the side effects), and after that the NETDEV_CHANGEMTU is sent so that
other devices can catch up with the new mtu. However, if they return
NOTIFY_BAD, then the change is reverted and error returned.

This is a really long and costy operation (sometimes). To fix this, add
NETDEV_PRECHANGEMTU notification which is called prior to any change
actually happening, and if any callee returns NOTIFY_BAD - the change is
aborted. This way we're skipping all the playing with apply/revert the mtu.

CC: "David S. Miller" 
CC: Jiri Pirko 
CC: Eric Dumazet 
CC: Nicolas Dichtel 
CC: Cong Wang 
Signed-off-by: Veaceslav Falico 
Acked-by: Jiri Pirko 
Signed-off-by: David S. Miller

net: rename sysfs symlinks on device name change

2014-01-15T23:16:20+00:00

Currently, we don't rename the upper/lower_ifc symlinks in
/sys/class/net/*/ , which might result stale/duplicate links/names.

Fix this by adding netdev_adjacent_rename_links(dev, oldname) which renames
all the upper/lower interface's links to dev from the upper/lower_oldname
to the new name.

We don't need a rollback because only we control these symlinks and if we
fail to rename them - sysfs will anyway complain.

Reported-by: Ding Tianhong 
CC: Ding Tianhong 
CC: "David S. Miller" 
CC: Eric Dumazet 
CC: Nicolas Dichtel 
CC: Cong Wang 
Signed-off-by: Veaceslav Falico 
Signed-off-by: David S. Miller