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authorPetr Machata <petrm@mellanox.com>2020-06-27 01:45:27 +0300
committerDavid S. Miller <davem@davemloft.net>2020-06-29 17:08:28 -0700
commit65545ea24998bb9aab1ce713a67c693dc7a947ec (patch)
treea879d25ec00a214417e97f39a239d5912a227f71 /net/sched/sch_red.c
parent3625750f05ecce21a0fce429c1ff85acfffb461b (diff)
net: sched: sch_red: Split init and change callbacks
In the following patches, RED will get two qevents. The implementation will be clearer if the callback for change is not a pure subset of the callback for init. Split the two and promote attribute parsing to the callbacks themselves from the common code, because it will be handy there. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_red.c')
-rw-r--r--net/sched/sch_red.c42
1 files changed, 30 insertions, 12 deletions
diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index 6ace7d757e8b..225ce370e5a8 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -215,12 +215,11 @@ static const struct nla_policy red_policy[TCA_RED_MAX + 1] = {
[TCA_RED_FLAGS] = NLA_POLICY_BITFIELD32(TC_RED_SUPPORTED_FLAGS),
};
-static int red_change(struct Qdisc *sch, struct nlattr *opt,
- struct netlink_ext_ack *extack)
+static int __red_change(struct Qdisc *sch, struct nlattr **tb,
+ struct netlink_ext_ack *extack)
{
struct Qdisc *old_child = NULL, *child = NULL;
struct red_sched_data *q = qdisc_priv(sch);
- struct nlattr *tb[TCA_RED_MAX + 1];
struct nla_bitfield32 flags_bf;
struct tc_red_qopt *ctl;
unsigned char userbits;
@@ -228,14 +227,6 @@ static int red_change(struct Qdisc *sch, struct nlattr *opt,
int err;
u32 max_P;
- if (opt == NULL)
- return -EINVAL;
-
- err = nla_parse_nested_deprecated(tb, TCA_RED_MAX, opt, red_policy,
- NULL);
- if (err < 0)
- return err;
-
if (tb[TCA_RED_PARMS] == NULL ||
tb[TCA_RED_STAB] == NULL)
return -EINVAL;
@@ -323,11 +314,38 @@ static int red_init(struct Qdisc *sch, struct nlattr *opt,
struct netlink_ext_ack *extack)
{
struct red_sched_data *q = qdisc_priv(sch);
+ struct nlattr *tb[TCA_RED_MAX + 1];
+ int err;
+
+ if (!opt)
+ return -EINVAL;
+
+ err = nla_parse_nested_deprecated(tb, TCA_RED_MAX, opt, red_policy,
+ extack);
+ if (err < 0)
+ return err;
q->qdisc = &noop_qdisc;
q->sch = sch;
timer_setup(&q->adapt_timer, red_adaptative_timer, 0);
- return red_change(sch, opt, extack);
+ return __red_change(sch, tb, extack);
+}
+
+static int red_change(struct Qdisc *sch, struct nlattr *opt,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *tb[TCA_RED_MAX + 1];
+ int err;
+
+ if (!opt)
+ return -EINVAL;
+
+ err = nla_parse_nested_deprecated(tb, TCA_RED_MAX, opt, red_policy,
+ extack);
+ if (err < 0)
+ return err;
+
+ return __red_change(sch, tb, extack);
}
static int red_dump_offload_stats(struct Qdisc *sch)