linux/net/dsa
Florian Fainelli 3e8a72d1da net: dsa: reduce number of protocol hooks
DSA is currently registering one packet_type function per EtherType it
needs to intercept in the receive path of a DSA-enabled Ethernet device.
Right now we have three of them: trailer, DSA and eDSA, and there might
be more in the future, this will not scale to the addition of new
protocols.

This patch proceeds with adding a new layer of abstraction and two new
functions:

dsa_switch_rcv() which will dispatch into the tag-protocol specific
receive function implemented by net/dsa/tag_*.c

dsa_slave_xmit() which will dispatch into the tag-protocol specific
transmit function implemented by net/dsa/tag_*.c

When we do create the per-port slave network devices, we iterate over
the switch protocol to assign the DSA-specific receive and transmit
operations.

A new fake ethertype value is used: ETH_P_XDSA to illustrate the fact
that this is no longer going to look like ETH_P_DSA or ETH_P_TRAILER
like it used to be.

This allows us to greatly simplify the check in eth_type_trans() and
always override the skb->protocol with ETH_P_XDSA for Ethernet switches
tagged protocol, while also reducing the number repetitive slave
netdevice_ops assignments.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-08-27 22:59:39 -07:00
..
dsa_priv.h net: dsa: reduce number of protocol hooks 2014-08-27 22:59:39 -07:00
dsa.c net: dsa: reduce number of protocol hooks 2014-08-27 22:59:39 -07:00
Kconfig dsa: Hide core config options; make drivers select what they need 2012-11-26 17:10:44 -05:00
Makefile dsa: Move switch drivers to new directory drivers/net/dsa 2011-11-29 00:21:36 -05:00
slave.c net: dsa: reduce number of protocol hooks 2014-08-27 22:59:39 -07:00
tag_dsa.c net: dsa: reduce number of protocol hooks 2014-08-27 22:59:39 -07:00
tag_edsa.c net: dsa: reduce number of protocol hooks 2014-08-27 22:59:39 -07:00
tag_trailer.c net: dsa: reduce number of protocol hooks 2014-08-27 22:59:39 -07:00