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net: openvswitch: make masks cache size configurable

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This patch makes the masks cache size configurable, or with
a size of 0, disable it.

Reviewed-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eelco Chaudron
2020-07-31 14:21:34 +02:00
committed by David S. Miller
parent 9d2f627b7e
commit 9bf24f594c
4 changed files with 115 additions and 14 deletions
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17
net/openvswitch/datapath.c
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@@ -1498,6 +1498,7 @@ static size_t ovs_dp_cmd_msg_size(void)
msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats));
msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats));
msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */
msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_MASKS_CACHE_SIZE */
return msgsize;
}
@@ -1535,6 +1536,10 @@ 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;
@@ -1599,6 +1604,16 @@ static int ovs_dp_change(struct datapath *dp, struct nlattr *a[])
#endif
}
if (a[OVS_DP_ATTR_MASKS_CACHE_SIZE]) {
int err;
u32 cache_size;
cache_size = nla_get_u32(a[OVS_DP_ATTR_MASKS_CACHE_SIZE]);
err = ovs_flow_tbl_masks_cache_resize(&dp->table, cache_size);
if (err)
return err;
}
dp->user_features = user_features;
if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING)
@@ -1887,6 +1902,8 @@ 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)),
};
static const struct genl_ops dp_datapath_genl_ops[] = {