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dpif-netdev: user space datapath recirculation

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Add basic recirculation infrastructure and user space
data path support for it. The following bond mega flow patch will
make use of this infrastructure.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Andy Zhou
2014-03-04 15:36:03 -08:00
parent f537461746
commit 572f732ab0
8 changed files with 218 additions and 10 deletions
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29
include/linux/openvswitch.h
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@@ -307,11 +307,13 @@ enum ovs_key_attr {
OVS_KEY_ATTR_TUNNEL, /* Nested set of ovs_tunnel attributes */
OVS_KEY_ATTR_SCTP, /* struct ovs_key_sctp */
OVS_KEY_ATTR_TCP_FLAGS, /* be16 TCP flags. */
#ifdef __KERNEL__
OVS_KEY_ATTR_IPV4_TUNNEL, /* struct ovs_key_ipv4_tunnel */
#endif
OVS_KEY_ATTR_DP_HASH = 20, /* u32 hash value */
OVS_KEY_ATTR_RECIRC_ID, /* u32 recirc id */
OVS_KEY_ATTR_MPLS = 62, /* array of struct ovs_key_mpls.
* The implementation may restrict
* the accepted length of the array. */
@@ -532,6 +534,29 @@ struct ovs_action_push_vlan {
__be16 vlan_tci; /* 802.1Q TCI (VLAN ID and priority). */
};
/* Data path hash algorithm for computing Datapath hash.
*
* The Algorithm type only specifies the fields in a flow
* will be used as part of the hash. Each datapath is free
* to use its own hash algorithm. The hash value will be
* opaque to the user space daemon.
*/
enum ovs_recirc_hash_alg {
OVS_RECIRC_HASH_ALG_NONE,
OVS_RECIRC_HASH_ALG_L4,
};
/*
* struct ovs_action_recirc - %OVS_ACTION_ATTR_RECIRC action argument.
* @recirc_id: The Recirculation label, Zero is invalid.
* @hash_alg: Algorithm used to compute hash prior to recirculation.
* @hash_bias: bias used for computing hash. used to compute hash prior to recirculation.
*/
struct ovs_action_recirc {
uint32_t hash_alg; /* One of ovs_dp_hash_alg. */
uint32_t hash_bias;
uint32_t recirc_id; /* Recirculation label. */
};
/**
* enum ovs_action_attr - Action types.
*
@@ -555,6 +580,7 @@ struct ovs_action_push_vlan {
* indicate the new packet contents. This could potentially still be
* %ETH_P_MPLS if the resulting MPLS label stack is not empty. If there
* is no MPLS label stack, as determined by ethertype, no action is taken.
* @OVS_ACTION_RECIRC: Recirculate within the data path.
*
* Only a single header can be set with a single %OVS_ACTION_ATTR_SET. Not all
* fields within a header are modifiable, e.g. the IPv4 protocol and fragment
@@ -571,6 +597,7 @@ enum ovs_action_attr {
OVS_ACTION_ATTR_SAMPLE, /* Nested OVS_SAMPLE_ATTR_*. */
OVS_ACTION_ATTR_PUSH_MPLS, /* struct ovs_action_push_mpls. */
OVS_ACTION_ATTR_POP_MPLS, /* __be16 ethertype. */
OVS_ACTION_ATTR_RECIRC, /* struct ovs_action_recirc. */
__OVS_ACTION_ATTR_MAX
};