On 22 Jul 2020, at 21:22, Florian Westphal wrote:
Eelco Chaudron <echau...@redhat.com> wrote:
This patch makes the masks cache size configurable, or with
a size of 0, disable it.
Reviewed-by: Paolo Abeni <pab...@redhat.com>
Signed-off-by: Eelco Chaudron <echau...@redhat.com>
---
include/uapi/linux/openvswitch.h | 1
net/openvswitch/datapath.c | 11 +++++
net/openvswitch/flow_table.c | 86
++++++++++++++++++++++++++++++++++----
net/openvswitch/flow_table.h | 10 ++++
4 files changed, 98 insertions(+), 10 deletions(-)
diff --git a/include/uapi/linux/openvswitch.h
b/include/uapi/linux/openvswitch.h
index 7cb76e5ca7cf..8300cc29dec8 100644
--- a/include/uapi/linux/openvswitch.h
+++ b/include/uapi/linux/openvswitch.h
@@ -86,6 +86,7 @@ enum ovs_datapath_attr {
OVS_DP_ATTR_MEGAFLOW_STATS, /* struct ovs_dp_megaflow_stats */
OVS_DP_ATTR_USER_FEATURES, /* OVS_DP_F_* */
OVS_DP_ATTR_PAD,
+ OVS_DP_ATTR_MASKS_CACHE_SIZE,
This new attr should probably get an entry in
datapath.c datapath_policy[].
Yes, I should have, will fix in v2.
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1535,6 +1535,10 @@ static int ovs_dp_cmd_fill_info(struct
datapath *dp, struct sk_buff *skb,
if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
goto nla_put_failure;
+ if (nla_put_u32(skb, OVS_DP_ATTR_MASKS_CACHE_SIZE,
+ ovs_flow_tbl_masks_cache_size(&dp->table)))
+ goto nla_put_failure;
+
genlmsg_end(skb, ovs_header);
return 0;
ovs_dp_cmd_msg_size() should add another nla_total_size(sizeof(u32))
to make sure there is enough space.
Same as above
+ if (a[OVS_DP_ATTR_MASKS_CACHE_SIZE]) {
+ u32 cache_size;
+
+ cache_size = nla_get_u32(a[OVS_DP_ATTR_MASKS_CACHE_SIZE]);
+ ovs_flow_tbl_masks_cache_resize(&dp->table, cache_size);
+ }
I see a 0 cache size is legal (turns it off) and that the allocation
path has a few sanity checks as well.
Would it make sense to add min/max policy to datapath_policy[] for
this
as well?
Yes I could add the following:
@@ -1906,7 +1906,8 @@ static const struct nla_policy
datapath_policy[OVS_DP_ATTR_MAX + 1] = {
[OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ
- 1 },
[OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
[OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
+ [OVS_DP_ATTR_MASKS_CACHE_SIZE] = NLA_POLICY_RANGE(NLA_U32, 0,
+ PCPU_MIN_UNIT_SIZE / sizeof(struct mask_cache_entry)),
};
Let me know your thoughts
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