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authorJoe Stringer <joestringer@nicira.com>2015-08-26 21:31:48 +0300
committerDavid S. Miller <davem@davemloft.net>2015-08-27 21:40:43 +0300
commit7f8a436eaa2c3ddd8e1ff2fbca267e6275085536 (patch)
tree44fa82400d8fc974e52788ff20689eab4f2fb7eb /net/openvswitch/Kconfig
parente79e259588a414589a016edc428ee8dd308f81ad (diff)
downloadlinux-7f8a436eaa2c3ddd8e1ff2fbca267e6275085536.tar.xz
openvswitch: Add conntrack action
Expose the kernel connection tracker via OVS. Userspace components can make use of the CT action to populate the connection state (ct_state) field for a flow. This state can be subsequently matched. Exposed connection states are OVS_CS_F_*: - NEW (0x01) - Beginning of a new connection. - ESTABLISHED (0x02) - Part of an existing connection. - RELATED (0x04) - Related to an established connection. - INVALID (0x20) - Could not track the connection for this packet. - REPLY_DIR (0x40) - This packet is in the reply direction for the flow. - TRACKED (0x80) - This packet has been sent through conntrack. When the CT action is executed by itself, it will send the packet through the connection tracker and populate the ct_state field with one or more of the connection state flags above. The CT action will always set the TRACKED bit. When the COMMIT flag is passed to the conntrack action, this specifies that information about the connection should be stored. This allows subsequent packets for the same (or related) connections to be correlated with this connection. Sending subsequent packets for the connection through conntrack allows the connection tracker to consider the packets as ESTABLISHED, RELATED, and/or REPLY_DIR. The CT action may optionally take a zone to track the flow within. This allows connections with the same 5-tuple to be kept logically separate from connections in other zones. If the zone is specified, then the "ct_zone" match field will be subsequently populated with the zone id. IP fragments are handled by transparently assembling them as part of the CT action. The maximum received unit (MRU) size is tracked so that refragmentation can occur during output. IP frag handling contributed by Andy Zhou. Based on original design by Justin Pettit. Signed-off-by: Joe Stringer <joestringer@nicira.com> Signed-off-by: Justin Pettit <jpettit@nicira.com> Signed-off-by: Andy Zhou <azhou@nicira.com> Acked-by: Thomas Graf <tgraf@suug.ch> Acked-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch/Kconfig')
-rw-r--r--net/openvswitch/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig
index 422dc0567de9..98f343d0d6dd 100644
--- a/net/openvswitch/Kconfig
+++ b/net/openvswitch/Kconfig
@@ -31,6 +31,17 @@ config OPENVSWITCH
If unsure, say N.
+config OPENVSWITCH_CONNTRACK
+ bool "Open vSwitch conntrack action support"
+ depends on OPENVSWITCH
+ depends on NF_CONNTRACK
+ default OPENVSWITCH
+ ---help---
+ If you say Y here, then Open vSwitch module will be able to pass
+ packets through conntrack.
+
+ Say N to exclude this support and reduce the binary size.
+
config OPENVSWITCH_GRE
tristate "Open vSwitch GRE tunneling support"
depends on OPENVSWITCH