ofproto/bond: only display hash entries with tx_byptes > 1KB

When recirculation is used to implement bond, all bond entries are
always populated regardless whether there is traffic going through
them or not. This change cuts down the noise when running
'ovs-appctl bond/show', by skipping '0KB' entries.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Jarno Rajahalme <jrajahalme@nicira.com>
ofproto/bond: Keep hash entry slave valid.

Bond recirculation needs to refresh the 'hidden rules' from
time to time. Keep hash entry slave valid to prevent those
hidden rules from being removed.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Jarno Rajahalme <jrajahalme@nicira.com>
ofproto/bond: properly maintain hash entry pr_rule

This is a bug causing per hash entry's pr_rule pointer not properly
maintained; they became NULL after each rebalancing. This patch fixes
this bug.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Jarno Rajahalme <jrajahalme@nicira.com>
ofproto-dpif: xlate should not attribute stats to bond entry when using recirc

When recirculation is used to implement bond, the bond entry stats are
collected from the hidden post recirculation rules. This bug causes
double counting of stats to some strenuous bond entries.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Jarno Rajahalme <jrajahalme@nicira.com>
userspace: add support for pop_eth and push_eth actions

These actions will allow L2->L3 and L3->L2 switching, and are supposed
to be added to flows installed in the datapath transparently by
ovs-vswitchd.

Signed-off-by: Lorand Jakab <lojakab@cisco.com>
userspace: add layer 3 flow and switching support

This commit relaxes the assumption that all packets have an Ethernet
header, and adds support for layer 3 flows.  For each packet received on
the Linux kernel datapath the l2 and l3 members of struct ofpbuf are
intialized appropriately, and some functions now expect this (notably
flow_extract()), in order to differentiate between layer 2 and layer 3
packets.  struct flow has now a new 'base_layer' member, because we
cannot assume that a flow has no Ethernet header when eth_src and
eth_dst are 0.  For layer 3 packets, the protocol type is still stored
in the eth_type member.

Switching L2->L3 and L3->L2 are both implemented by adding the pop_eth
and push_eth actions respectively when a transition is detected.  The
push_eth action puts 0s on both source and destination MACs.  These
addresses can be modified with mod_dl_dst and mod_dl_src actions.

Added new prerequisite MFP_ETHERNET for fields MFF_ETH_SRC, MFF_ETH_DST,
MFF_VLAN_TCI, MFF_DL_VLAN, MFF_VLAN_VID and MFF_DL_VLAN_PCP.

Signed-off-by: Lorand Jakab <lojakab@cisco.com>
datapath: add layer 3 flow/port support

Implementation of the pop_eth and push_eth actions in the kernel, and
layer 3 flow support.

Signed-off-by: Lorand Jakab <lojakab@cisco.com>
Fix the setting of the noeth flow member

Triggered by Jesse's review (comment #5)
Address Jesse's comments
Address Jesse's comments
Address Jesse's comments
Fix whitespace
Address Thomas' comments
Address Jesse's comments