diff options
author | Joe Stringer <joestringer@nicira.com> | 2015-01-21 16:42:52 -0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2015-01-26 15:45:50 -0800 |
commit | 74ed7ab9264c54471c7f057409d352052820d750 (patch) | |
tree | f90152a0560337fceaf55538a9e57e8c9aaa9182 /net/openvswitch/flow_table.h | |
parent | 7b1883cefc288b2725966357edd2d8f321605622 (diff) | |
download | linux-74ed7ab9264c54471c7f057409d352052820d750.tar.bz2 |
openvswitch: Add support for unique flow IDs.
Previously, flows were manipulated by userspace specifying a full,
unmasked flow key. This adds significant burden onto flow
serialization/deserialization, particularly when dumping flows.
This patch adds an alternative way to refer to flows using a
variable-length "unique flow identifier" (UFID). At flow setup time,
userspace may specify a UFID for a flow, which is stored with the flow
and inserted into a separate table for lookup, in addition to the
standard flow table. Flows created using a UFID must be fetched or
deleted using the UFID.
All flow dump operations may now be made more terse with OVS_UFID_F_*
flags. For example, the OVS_UFID_F_OMIT_KEY flag allows responses to
omit the flow key from a datapath operation if the flow has a
corresponding UFID. This significantly reduces the time spent assembling
and transacting netlink messages. With all OVS_UFID_F_OMIT_* flags
enabled, the datapath only returns the UFID and statistics for each flow
during flow dump, increasing ovs-vswitchd revalidator performance by 40%
or more.
Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch/flow_table.h')
-rw-r--r-- | net/openvswitch/flow_table.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/openvswitch/flow_table.h b/net/openvswitch/flow_table.h index 309fa6415689..616eda10d955 100644 --- a/net/openvswitch/flow_table.h +++ b/net/openvswitch/flow_table.h @@ -47,9 +47,11 @@ struct table_instance { struct flow_table { struct table_instance __rcu *ti; + struct table_instance __rcu *ufid_ti; struct list_head mask_list; unsigned long last_rehash; unsigned int count; + unsigned int ufid_count; }; extern struct kmem_cache *flow_stats_cache; @@ -78,8 +80,10 @@ struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *, const struct sw_flow_key *); struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl, const struct sw_flow_match *match); -bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow, - const struct sw_flow_match *match); +struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *, + const struct sw_flow_id *); + +bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *); void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src, const struct sw_flow_mask *mask); |