This is a note to let you know that I've just added the patch titled
net/sched: mqprio: refactor nlattr parsing to a separate function
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-sched-mqprio-refactor-nlattr-parsing-to-a-separa.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 19a5ce117b48356ffdea53451cf712f28a93123b
Author: Vladimir Oltean <vladimir.oltean@xxxxxxx>
Date: Sat Feb 4 15:52:55 2023 +0200
net/sched: mqprio: refactor nlattr parsing to a separate function
[ Upstream commit feb2cf3dcfb930aec2ca65c66d1365543d5ba943 ]
mqprio_init() is quite large and unwieldy to add more code to.
Split the netlink attribute parsing to a dedicated function.
Signed-off-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
Reviewed-by: Jacob Keller <jacob.e.keller@xxxxxxxxx>
Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Stable-dep-of: 6c58c8816abb ("net/sched: mqprio: Add length check for TCA_MQPRIO_{MAX/MIN}_RATE64")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/sched/sch_mqprio.c b/net/sched/sch_mqprio.c
index 50e15add6068f..a5df5604e0150 100644
--- a/net/sched/sch_mqprio.c
+++ b/net/sched/sch_mqprio.c
@@ -130,6 +130,67 @@ static int parse_attr(struct nlattr *tb[], int maxtype, struct nlattr *nla,
return 0;
}
+static int mqprio_parse_nlattr(struct Qdisc *sch, struct tc_mqprio_qopt *qopt,
+ struct nlattr *opt)
+{
+ struct mqprio_sched *priv = qdisc_priv(sch);
+ struct nlattr *tb[TCA_MQPRIO_MAX + 1];
+ struct nlattr *attr;
+ int i, rem, err;
+
+ err = parse_attr(tb, TCA_MQPRIO_MAX, opt, mqprio_policy,
+ sizeof(*qopt));
+ if (err < 0)
+ return err;
+
+ if (!qopt->hw)
+ return -EINVAL;
+
+ if (tb[TCA_MQPRIO_MODE]) {
+ priv->flags |= TC_MQPRIO_F_MODE;
+ priv->mode = *(u16 *)nla_data(tb[TCA_MQPRIO_MODE]);
+ }
+
+ if (tb[TCA_MQPRIO_SHAPER]) {
+ priv->flags |= TC_MQPRIO_F_SHAPER;
+ priv->shaper = *(u16 *)nla_data(tb[TCA_MQPRIO_SHAPER]);
+ }
+
+ if (tb[TCA_MQPRIO_MIN_RATE64]) {
+ if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE)
+ return -EINVAL;
+ i = 0;
+ nla_for_each_nested(attr, tb[TCA_MQPRIO_MIN_RATE64],
+ rem) {
+ if (nla_type(attr) != TCA_MQPRIO_MIN_RATE64)
+ return -EINVAL;
+ if (i >= qopt->num_tc)
+ break;
+ priv->min_rate[i] = *(u64 *)nla_data(attr);
+ i++;
+ }
+ priv->flags |= TC_MQPRIO_F_MIN_RATE;
+ }
+
+ if (tb[TCA_MQPRIO_MAX_RATE64]) {
+ if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE)
+ return -EINVAL;
+ i = 0;
+ nla_for_each_nested(attr, tb[TCA_MQPRIO_MAX_RATE64],
+ rem) {
+ if (nla_type(attr) != TCA_MQPRIO_MAX_RATE64)
+ return -EINVAL;
+ if (i >= qopt->num_tc)
+ break;
+ priv->max_rate[i] = *(u64 *)nla_data(attr);
+ i++;
+ }
+ priv->flags |= TC_MQPRIO_F_MAX_RATE;
+ }
+
+ return 0;
+}
+
static int mqprio_init(struct Qdisc *sch, struct nlattr *opt,
struct netlink_ext_ack *extack)
{
@@ -139,9 +200,6 @@ static int mqprio_init(struct Qdisc *sch, struct nlattr *opt,
struct Qdisc *qdisc;
int i, err = -EOPNOTSUPP;
struct tc_mqprio_qopt *qopt = NULL;
- struct nlattr *tb[TCA_MQPRIO_MAX + 1];
- struct nlattr *attr;
- int rem;
int len;
BUILD_BUG_ON(TC_MAX_QUEUE != TC_QOPT_MAX_QUEUE);
@@ -166,55 +224,9 @@ static int mqprio_init(struct Qdisc *sch, struct nlattr *opt,
len = nla_len(opt) - NLA_ALIGN(sizeof(*qopt));
if (len > 0) {
- err = parse_attr(tb, TCA_MQPRIO_MAX, opt, mqprio_policy,
- sizeof(*qopt));
- if (err < 0)
+ err = mqprio_parse_nlattr(sch, qopt, opt);
+ if (err)
return err;
-
- if (!qopt->hw)
- return -EINVAL;
-
- if (tb[TCA_MQPRIO_MODE]) {
- priv->flags |= TC_MQPRIO_F_MODE;
- priv->mode = *(u16 *)nla_data(tb[TCA_MQPRIO_MODE]);
- }
-
- if (tb[TCA_MQPRIO_SHAPER]) {
- priv->flags |= TC_MQPRIO_F_SHAPER;
- priv->shaper = *(u16 *)nla_data(tb[TCA_MQPRIO_SHAPER]);
- }
-
- if (tb[TCA_MQPRIO_MIN_RATE64]) {
- if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE)
- return -EINVAL;
- i = 0;
- nla_for_each_nested(attr, tb[TCA_MQPRIO_MIN_RATE64],
- rem) {
- if (nla_type(attr) != TCA_MQPRIO_MIN_RATE64)
- return -EINVAL;
- if (i >= qopt->num_tc)
- break;
- priv->min_rate[i] = *(u64 *)nla_data(attr);
- i++;
- }
- priv->flags |= TC_MQPRIO_F_MIN_RATE;
- }
-
- if (tb[TCA_MQPRIO_MAX_RATE64]) {
- if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE)
- return -EINVAL;
- i = 0;
- nla_for_each_nested(attr, tb[TCA_MQPRIO_MAX_RATE64],
- rem) {
- if (nla_type(attr) != TCA_MQPRIO_MAX_RATE64)
- return -EINVAL;
- if (i >= qopt->num_tc)
- break;
- priv->max_rate[i] = *(u64 *)nla_data(attr);
- i++;
- }
- priv->flags |= TC_MQPRIO_F_MAX_RATE;
- }
}
/* pre-allocate qdisc, attachment can't fail */
