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Date: Thu, 22 Mar 2018 18:00:25 -0400
From: Roman Mashak <mrv@...atatu.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, kernel@...atatu.com, jhs@...atatu.com,
xiyou.wangcong@...il.com, jiri@...nulli.us,
Roman Mashak <mrv@...atatu.com>
Subject: [PATCH net-next 1/1] net sched actions: merge event notification routines
Collapse tca_get_notify(), tca_add_notify() and tca_del_notify() in a
single function since they repeat the same code pattern.
Signed-off-by: Roman Mashak <mrv@...atatu.com>
---
net/sched/act_api.c | 111 ++++++++++++++++------------------------------------
1 file changed, 33 insertions(+), 78 deletions(-)
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 57cf37145282..5b04184fb525 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -895,24 +895,41 @@ static int tca_get_fill(struct sk_buff *skb, struct list_head *actions,
return -1;
}
-static int
-tcf_get_notify(struct net *net, u32 portid, struct nlmsghdr *n,
- struct list_head *actions, int event,
- struct netlink_ext_ack *extack)
+static int tca_notify(struct net *net, struct nlmsghdr *n,
+ struct list_head *actions, u32 portid, int event,
+ size_t attr_size, struct netlink_ext_ack *extack)
{
struct sk_buff *skb;
+ int err;
- skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
+ skb = alloc_skb(attr_size <= NLMSG_GOODSIZE ? NLMSG_GOODSIZE : attr_size,
+ GFP_KERNEL);
if (!skb)
return -ENOBUFS;
- if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event,
- 0, 0) <= 0) {
- NL_SET_ERR_MSG(extack, "Failed to fill netlink attributes while adding TC action");
+
+ if (tca_get_fill(skb, actions, portid, n->nlmsg_seq,
+ event == RTM_NEWACTION ? n->nlmsg_flags : 0,
+ event, 0,
+ event == RTM_DELACTION ? 1 : 0) <= 0) {
+ NL_SET_ERR_MSG(extack, "Failed to fill netlink TC action attributes in event message");
kfree_skb(skb);
return -EINVAL;
}
- return rtnl_unicast(skb, net, portid);
+ if (event == RTM_GETACTION) {
+ return rtnl_unicast(skb, net, portid);
+ } else if (event == RTM_DELACTION) {
+ /* now do the delete */
+ err = tcf_action_destroy(actions, 0);
+ if (err < 0) {
+ NL_SET_ERR_MSG(extack, "Failed to delete TC action");
+ kfree_skb(skb);
+ return err;
+ }
+ }
+ err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
+ n->nlmsg_flags & NLM_F_ECHO);
+ return err > 0 ? 0 : err;
}
static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla,
@@ -1034,40 +1051,6 @@ static int tca_action_flush(struct net *net, struct nlattr *nla,
}
static int
-tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
- u32 portid, size_t attr_size, struct netlink_ext_ack *extack)
-{
- int ret;
- struct sk_buff *skb;
-
- skb = alloc_skb(attr_size <= NLMSG_GOODSIZE ? NLMSG_GOODSIZE : attr_size,
- GFP_KERNEL);
- if (!skb)
- return -ENOBUFS;
-
- if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, RTM_DELACTION,
- 0, 1) <= 0) {
- NL_SET_ERR_MSG(extack, "Failed to fill netlink TC action attributes");
- kfree_skb(skb);
- return -EINVAL;
- }
-
- /* now do the delete */
- ret = tcf_action_destroy(actions, 0);
- if (ret < 0) {
- NL_SET_ERR_MSG(extack, "Failed to delete TC action");
- kfree_skb(skb);
- return ret;
- }
-
- ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
- n->nlmsg_flags & NLM_F_ECHO);
- if (ret > 0)
- return 0;
- return ret;
-}
-
-static int
tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
u32 portid, int event, struct netlink_ext_ack *extack)
{
@@ -1102,46 +1085,17 @@ tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
attr_size = tcf_action_full_attrs_size(attr_size);
- if (event == RTM_GETACTION)
- ret = tcf_get_notify(net, portid, n, &actions, event, extack);
- else { /* delete */
- ret = tcf_del_notify(net, n, &actions, portid, attr_size, extack);
- if (ret)
- goto err;
- return ret;
- }
+ ret = tca_notify(net, n, &actions, portid, event, attr_size, extack);
+ if (ret)
+ goto err;
+ return ret;
+
err:
if (event != RTM_GETACTION)
tcf_action_destroy(&actions, 0);
return ret;
}
-static int
-tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
- u32 portid, size_t attr_size, struct netlink_ext_ack *extack)
-{
- struct sk_buff *skb;
- int err = 0;
-
- skb = alloc_skb(attr_size <= NLMSG_GOODSIZE ? NLMSG_GOODSIZE : attr_size,
- GFP_KERNEL);
- if (!skb)
- return -ENOBUFS;
-
- if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, n->nlmsg_flags,
- RTM_NEWACTION, 0, 0) <= 0) {
- NL_SET_ERR_MSG(extack, "Failed to fill netlink attributes while adding TC action");
- kfree_skb(skb);
- return -EINVAL;
- }
-
- err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
- n->nlmsg_flags & NLM_F_ECHO);
- if (err > 0)
- err = 0;
- return err;
-}
-
static int tcf_action_add(struct net *net, struct nlattr *nla,
struct nlmsghdr *n, u32 portid, int ovr,
struct netlink_ext_ack *extack)
@@ -1155,7 +1109,8 @@ static int tcf_action_add(struct net *net, struct nlattr *nla,
if (ret)
return ret;
- return tcf_add_notify(net, n, &actions, portid, attr_size, extack);
+ return tca_notify(net, n, &actions, portid, RTM_NEWACTION, attr_size,
+ extack);
}
static u32 tcaa_root_flags_allowed = TCA_FLAG_LARGE_DUMP_ON;
--
2.7.4
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