pkt_sched: skbedit add support for setting mark

This adds support for setting the skb mark.
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/tc_act/tc_skbedit.h

@@ -26,6 +26,7 @@
 
 #define SKBEDIT_F_PRIORITY		0x1
 #define SKBEDIT_F_QUEUE_MAPPING		0x2
+#define SKBEDIT_F_MARK			0x4
 
 struct tc_skbedit {
 	tc_gen;
@@ -37,6 +38,7 @@ enum {
 	TCA_SKBEDIT_PARMS,
 	TCA_SKBEDIT_PRIORITY,
 	TCA_SKBEDIT_QUEUE_MAPPING,
+	TCA_SKBEDIT_MARK,
 	__TCA_SKBEDIT_MAX
 };
 #define TCA_SKBEDIT_MAX (__TCA_SKBEDIT_MAX - 1)

include/net/tc_act/tc_skbedit.h

@@ -26,7 +26,9 @@ struct tcf_skbedit {
 	struct tcf_common	common;
 	u32			flags;
 	u32     		priority;
+	u32     		mark;
 	u16			queue_mapping;
+	/* XXX: 16-bit pad here? */
 };
 #define to_skbedit(pc) \
 	container_of(pc, struct tcf_skbedit, common)

net/sched/act_skbedit.c

@@ -54,6 +54,8 @@ static int tcf_skbedit(struct sk_buff *skb, struct tc_action *a,
 	if (d->flags & SKBEDIT_F_QUEUE_MAPPING &&
 	    skb->dev->real_num_tx_queues > d->queue_mapping)
 		skb_set_queue_mapping(skb, d->queue_mapping);
+	if (d->flags & SKBEDIT_F_MARK)
+		skb->mark = d->mark;
 
 	spin_unlock(&d->tcf_lock);
 	return d->tcf_action;
@@ -63,6 +65,7 @@ static const struct nla_policy skbedit_policy[TCA_SKBEDIT_MAX + 1] = {
 	[TCA_SKBEDIT_PARMS]		= { .len = sizeof(struct tc_skbedit) },
 	[TCA_SKBEDIT_PRIORITY]		= { .len = sizeof(u32) },
 	[TCA_SKBEDIT_QUEUE_MAPPING]	= { .len = sizeof(u16) },
+	[TCA_SKBEDIT_MARK]		= { .len = sizeof(u32) },
 };
 
 static int tcf_skbedit_init(struct nlattr *nla, struct nlattr *est,
@@ -72,7 +75,7 @@ static int tcf_skbedit_init(struct nlattr *nla, struct nlattr *est,
 	struct tc_skbedit *parm;
 	struct tcf_skbedit *d;
 	struct tcf_common *pc;
-	u32 flags = 0, *priority = NULL;
+	u32 flags = 0, *priority = NULL, *mark = NULL;
 	u16 *queue_mapping = NULL;
 	int ret = 0, err;
 
@@ -95,6 +98,12 @@ static int tcf_skbedit_init(struct nlattr *nla, struct nlattr *est,
 		flags |= SKBEDIT_F_QUEUE_MAPPING;
 		queue_mapping = nla_data(tb[TCA_SKBEDIT_QUEUE_MAPPING]);
 	}
+
+	if (tb[TCA_SKBEDIT_MARK] != NULL) {
+		flags |= SKBEDIT_F_MARK;
+		mark = nla_data(tb[TCA_SKBEDIT_MARK]);
+	}
+
 	if (!flags)
 		return -EINVAL;
 
@@ -124,6 +133,9 @@ static int tcf_skbedit_init(struct nlattr *nla, struct nlattr *est,
 		d->priority = *priority;
 	if (flags & SKBEDIT_F_QUEUE_MAPPING)
 		d->queue_mapping = *queue_mapping;
+	if (flags & SKBEDIT_F_MARK)
+		d->mark = *mark;
+
 	d->tcf_action = parm->action;
 
 	spin_unlock_bh(&d->tcf_lock);
@@ -161,6 +173,9 @@ static inline int tcf_skbedit_dump(struct sk_buff *skb, struct tc_action *a,
 	if (d->flags & SKBEDIT_F_QUEUE_MAPPING)
 		NLA_PUT(skb, TCA_SKBEDIT_QUEUE_MAPPING,
 			sizeof(d->queue_mapping), &d->queue_mapping);
+	if (d->flags & SKBEDIT_F_MARK)
+		NLA_PUT(skb, TCA_SKBEDIT_MARK, sizeof(d->mark),
+			&d->mark);
 	t.install = jiffies_to_clock_t(jiffies - d->tcf_tm.install);
 	t.lastuse = jiffies_to_clock_t(jiffies - d->tcf_tm.lastuse);
 	t.expires = jiffies_to_clock_t(d->tcf_tm.expires);