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Message-Id: <1417575363-13770-1-git-send-email-joestringer@nicira.com>
Date: Tue, 2 Dec 2014 18:56:02 -0800
From: Joe Stringer <joestringer@...ira.com>
To: netdev@...r.kernel.org
Cc: pshelar@...ira.com, linux-kernel@...r.kernel.org,
dev@...nvswitch.org
Subject: [PATCHv11 net-next 1/2] openvswitch: Refactor ovs_nla_fill_match().
Refactor the ovs_nla_fill_match() function into separate netlink
serialization functions ovs_nla_put_{unmasked_key,masked_key,mask}().
Modify ovs_nla_put_flow() to handle attribute nesting and expose the
'is_mask' parameter - all callers need to nest the flow, and callers
have better knowledge about whether it is serializing a mask or not.
The next patch will be the first user of ovs_nla_put_masked_key().
Signed-off-by: Joe Stringer <joestringer@...ira.com>
---
v11: Shift netlink serialization of key/mask to flow_netlink.c
Add put_{unmasked_key,key,mask} helpers.
Perform nesting in ovs_nla_put_flow().
v10: First post.
---
net/openvswitch/datapath.c | 41 ++++++------------------------------
net/openvswitch/flow_netlink.c | 45 +++++++++++++++++++++++++++++++++++++---
net/openvswitch/flow_netlink.h | 8 +++++--
3 files changed, 54 insertions(+), 40 deletions(-)
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 332b5a0..b2a3796 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -462,10 +462,8 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
0, upcall_info->cmd);
upcall->dp_ifindex = dp_ifindex;
- nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
- err = ovs_nla_put_flow(key, key, user_skb);
+ err = ovs_nla_put_flow(key, key, OVS_PACKET_ATTR_KEY, false, user_skb);
BUG_ON(err);
- nla_nest_end(user_skb, nla);
if (upcall_info->userdata)
__nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
@@ -676,37 +674,6 @@ static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
}
/* Called with ovs_mutex or RCU read lock. */
-static int ovs_flow_cmd_fill_match(const struct sw_flow *flow,
- struct sk_buff *skb)
-{
- struct nlattr *nla;
- int err;
-
- /* Fill flow key. */
- nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
- if (!nla)
- return -EMSGSIZE;
-
- err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb);
- if (err)
- return err;
-
- nla_nest_end(skb, nla);
-
- /* Fill flow mask. */
- nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK);
- if (!nla)
- return -EMSGSIZE;
-
- err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb);
- if (err)
- return err;
-
- nla_nest_end(skb, nla);
- return 0;
-}
-
-/* Called with ovs_mutex or RCU read lock. */
static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow,
struct sk_buff *skb)
{
@@ -787,7 +754,11 @@ static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex,
ovs_header->dp_ifindex = dp_ifindex;
- err = ovs_flow_cmd_fill_match(flow, skb);
+ err = ovs_nla_put_unmasked_key(flow, skb);
+ if (err)
+ goto error;
+
+ err = ovs_nla_put_mask(flow, skb);
if (err)
goto error;
diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index df3c7f2..7bb571f 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -1131,12 +1131,12 @@ int ovs_nla_get_flow_metadata(const struct nlattr *attr,
return metadata_from_nlattrs(&match, &attrs, a, false, log);
}
-int ovs_nla_put_flow(const struct sw_flow_key *swkey,
- const struct sw_flow_key *output, struct sk_buff *skb)
+int __ovs_nla_put_flow(const struct sw_flow_key *swkey,
+ const struct sw_flow_key *output, bool is_mask,
+ struct sk_buff *skb)
{
struct ovs_key_ethernet *eth_key;
struct nlattr *nla, *encap;
- bool is_mask = (swkey != output);
if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
goto nla_put_failure;
@@ -1346,6 +1346,45 @@ nla_put_failure:
return -EMSGSIZE;
}
+int ovs_nla_put_flow(const struct sw_flow_key *swkey,
+ const struct sw_flow_key *output, int attr, bool is_mask,
+ struct sk_buff *skb)
+{
+ int err;
+ struct nlattr *nla;
+
+ nla = nla_nest_start(skb, attr);
+ if (!nla)
+ return -EMSGSIZE;
+ err = __ovs_nla_put_flow(swkey, output, is_mask, skb);
+ if (err)
+ return err;
+ nla_nest_end(skb, nla);
+
+ return 0;
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+int ovs_nla_put_unmasked_key(const struct sw_flow *flow, struct sk_buff *skb)
+{
+ return ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key,
+ OVS_FLOW_ATTR_KEY, false, skb);
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
+{
+ return ovs_nla_put_flow(&flow->mask->key, &flow->key,
+ OVS_FLOW_ATTR_KEY, false, skb);
+}
+
+/* Called with ovs_mutex or RCU read lock. */
+int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
+{
+ return ovs_nla_put_flow(&flow->key, &flow->mask->key,
+ OVS_FLOW_ATTR_MASK, true, skb);
+}
+
#define MAX_ACTIONS_BUFSIZE (32 * 1024)
static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log)
diff --git a/net/openvswitch/flow_netlink.h b/net/openvswitch/flow_netlink.h
index 577f12b..ea54564 100644
--- a/net/openvswitch/flow_netlink.h
+++ b/net/openvswitch/flow_netlink.h
@@ -43,11 +43,15 @@ size_t ovs_key_attr_size(void);
void ovs_match_init(struct sw_flow_match *match,
struct sw_flow_key *key, struct sw_flow_mask *mask);
-int ovs_nla_put_flow(const struct sw_flow_key *,
- const struct sw_flow_key *, struct sk_buff *);
+int ovs_nla_put_flow(const struct sw_flow_key *, const struct sw_flow_key *,
+ int attr, bool is_mask, struct sk_buff *);
int ovs_nla_get_flow_metadata(const struct nlattr *, struct sw_flow_key *,
bool log);
+int ovs_nla_put_unmasked_key(const struct sw_flow *flow, struct sk_buff *skb);
+int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb);
+int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb);
+
int ovs_nla_get_match(struct sw_flow_match *, const struct nlattr *key,
const struct nlattr *mask, bool log);
int ovs_nla_put_egress_tunnel_key(struct sk_buff *,
--
1.7.10.4
--
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