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Diffstat (limited to 'net/openvswitch/flow_netlink.c')
-rw-r--r--net/openvswitch/flow_netlink.c145
1 files changed, 99 insertions, 46 deletions
diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index 1105a838bab8..7e1d8a2afa63 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2007-2014 Nicira, Inc.
+ * Copyright (c) 2007-2017 Nicira, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
@@ -59,6 +59,39 @@ struct ovs_len_tbl {
#define OVS_ATTR_NESTED -1
#define OVS_ATTR_VARIABLE -2
+static bool actions_may_change_flow(const struct nlattr *actions)
+{
+ struct nlattr *nla;
+ int rem;
+
+ nla_for_each_nested(nla, actions, rem) {
+ u16 action = nla_type(nla);
+
+ switch (action) {
+ case OVS_ACTION_ATTR_OUTPUT:
+ case OVS_ACTION_ATTR_RECIRC:
+ case OVS_ACTION_ATTR_TRUNC:
+ case OVS_ACTION_ATTR_USERSPACE:
+ break;
+
+ case OVS_ACTION_ATTR_CT:
+ case OVS_ACTION_ATTR_HASH:
+ case OVS_ACTION_ATTR_POP_ETH:
+ case OVS_ACTION_ATTR_POP_MPLS:
+ case OVS_ACTION_ATTR_POP_VLAN:
+ case OVS_ACTION_ATTR_PUSH_ETH:
+ case OVS_ACTION_ATTR_PUSH_MPLS:
+ case OVS_ACTION_ATTR_PUSH_VLAN:
+ case OVS_ACTION_ATTR_SAMPLE:
+ case OVS_ACTION_ATTR_SET:
+ case OVS_ACTION_ATTR_SET_MASKED:
+ default:
+ return true;
+ }
+ }
+ return false;
+}
+
static void update_range(struct sw_flow_match *match,
size_t offset, size_t size, bool is_mask)
{
@@ -2023,18 +2056,20 @@ static inline void add_nested_action_end(struct sw_flow_actions *sfa,
static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
const struct sw_flow_key *key,
- int depth, struct sw_flow_actions **sfa,
+ struct sw_flow_actions **sfa,
__be16 eth_type, __be16 vlan_tci, bool log);
static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
- const struct sw_flow_key *key, int depth,
+ const struct sw_flow_key *key,
struct sw_flow_actions **sfa,
- __be16 eth_type, __be16 vlan_tci, bool log)
+ __be16 eth_type, __be16 vlan_tci,
+ bool log, bool last)
{
const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
const struct nlattr *probability, *actions;
const struct nlattr *a;
- int rem, start, err, st_acts;
+ int rem, start, err;
+ struct sample_arg arg;
memset(attrs, 0, sizeof(attrs));
nla_for_each_nested(a, attr, rem) {
@@ -2058,20 +2093,32 @@ static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
if (start < 0)
return start;
- err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
- nla_data(probability), sizeof(u32), log);
+
+ /* When both skb and flow may be changed, put the sample
+ * into a deferred fifo. On the other hand, if only skb
+ * may be modified, the actions can be executed in place.
+ *
+ * Do this analysis at the flow installation time.
+ * Set 'clone_action->exec' to true if the actions can be
+ * executed without being deferred.
+ *
+ * If the sample is the last action, it can always be excuted
+ * rather than deferred.
+ */
+ arg.exec = last || !actions_may_change_flow(actions);
+ arg.probability = nla_get_u32(probability);
+
+ err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_ARG, &arg, sizeof(arg),
+ log);
if (err)
return err;
- st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
- if (st_acts < 0)
- return st_acts;
- err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa,
+ err = __ovs_nla_copy_actions(net, actions, key, sfa,
eth_type, vlan_tci, log);
+
if (err)
return err;
- add_nested_action_end(*sfa, st_acts);
add_nested_action_end(*sfa, start);
return 0;
@@ -2380,8 +2427,8 @@ static int validate_userspace(const struct nlattr *attr)
struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
int error;
- error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
- attr, userspace_policy);
+ error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, attr,
+ userspace_policy, NULL);
if (error)
return error;
@@ -2408,16 +2455,13 @@ static int copy_action(const struct nlattr *from,
static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
const struct sw_flow_key *key,
- int depth, struct sw_flow_actions **sfa,
+ struct sw_flow_actions **sfa,
__be16 eth_type, __be16 vlan_tci, bool log)
{
u8 mac_proto = ovs_key_mac_proto(key);
const struct nlattr *a;
int rem, err;
- if (depth >= SAMPLE_ACTION_DEPTH)
- return -EOVERFLOW;
-
nla_for_each_nested(a, attr, rem) {
/* Expected argument lengths, (u32)-1 for variable length. */
static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
@@ -2555,13 +2599,17 @@ static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
return err;
break;
- case OVS_ACTION_ATTR_SAMPLE:
- err = validate_and_copy_sample(net, a, key, depth, sfa,
- eth_type, vlan_tci, log);
+ case OVS_ACTION_ATTR_SAMPLE: {
+ bool last = nla_is_last(a, rem);
+
+ err = validate_and_copy_sample(net, a, key, sfa,
+ eth_type, vlan_tci,
+ log, last);
if (err)
return err;
skip_copy = true;
break;
+ }
case OVS_ACTION_ATTR_CT:
err = ovs_ct_copy_action(net, a, key, sfa, log);
@@ -2615,7 +2663,7 @@ int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
return PTR_ERR(*sfa);
(*sfa)->orig_len = nla_len(attr);
- err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
+ err = __ovs_nla_copy_actions(net, attr, key, sfa, key->eth.type,
key->eth.vlan.tci, log);
if (err)
ovs_nla_free_flow_actions(*sfa);
@@ -2623,39 +2671,44 @@ int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
return err;
}
-static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
+static int sample_action_to_attr(const struct nlattr *attr,
+ struct sk_buff *skb)
{
- const struct nlattr *a;
- struct nlattr *start;
- int err = 0, rem;
+ struct nlattr *start, *ac_start = NULL, *sample_arg;
+ int err = 0, rem = nla_len(attr);
+ const struct sample_arg *arg;
+ struct nlattr *actions;
start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
if (!start)
return -EMSGSIZE;
- nla_for_each_nested(a, attr, rem) {
- int type = nla_type(a);
- struct nlattr *st_sample;
+ sample_arg = nla_data(attr);
+ arg = nla_data(sample_arg);
+ actions = nla_next(sample_arg, &rem);
- switch (type) {
- case OVS_SAMPLE_ATTR_PROBABILITY:
- if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
- sizeof(u32), nla_data(a)))
- return -EMSGSIZE;
- break;
- case OVS_SAMPLE_ATTR_ACTIONS:
- st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
- if (!st_sample)
- return -EMSGSIZE;
- err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
- if (err)
- return err;
- nla_nest_end(skb, st_sample);
- break;
- }
+ if (nla_put_u32(skb, OVS_SAMPLE_ATTR_PROBABILITY, arg->probability)) {
+ err = -EMSGSIZE;
+ goto out;
+ }
+
+ ac_start = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
+ if (!ac_start) {
+ err = -EMSGSIZE;
+ goto out;
+ }
+
+ err = ovs_nla_put_actions(actions, rem, skb);
+
+out:
+ if (err) {
+ nla_nest_cancel(skb, ac_start);
+ nla_nest_cancel(skb, start);
+ } else {
+ nla_nest_end(skb, ac_start);
+ nla_nest_end(skb, start);
}
- nla_nest_end(skb, start);
return err;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-15 18:29:04 +0300