[NET_SCHED]: Use nla_nest_start/nla_nest_end

Use nla_nest_start/nla_nest_end for dumping nested attributes.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 12 deletions

diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index 585f8a6ec7ec..da0f6c0152de 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -1565,18 +1565,18 @@ static int cbq_dump_attr(struct sk_buff *skb, struct cbq_class *cl)
 static int cbq_dump(struct Qdisc *sch, struct sk_buff *skb)
 {
         struct cbq_sched_data *q = qdisc_priv(sch);
-        unsigned char *b = skb_tail_pointer(skb);
-        struct nlattr *nla;
+        struct nlattr *nest;
 
-        nla = (struct nlattr*)b;
-        NLA_PUT(skb, TCA_OPTIONS, 0, NULL);
+        nest = nla_nest_start(skb, TCA_OPTIONS);
+        if (nest == NULL)
+                goto nla_put_failure;
         if (cbq_dump_attr(skb, &q->link) < 0)
                 goto nla_put_failure;
-        nla->nla_len = skb_tail_pointer(skb) - b;
+        nla_nest_end(skb, nest);
         return skb->len;
 
 nla_put_failure:
-        nlmsg_trim(skb, b);
+        nla_nest_cancel(skb, nest);
         return -1;
 }
 
@@ -1594,8 +1594,7 @@ cbq_dump_class(struct Qdisc *sch, unsigned long arg,
                struct sk_buff *skb, struct tcmsg *tcm)
 {
         struct cbq_class *cl = (struct cbq_class*)arg;
-        unsigned char *b = skb_tail_pointer(skb);
-        struct nlattr *nla;
+        struct nlattr *nest;
 
         if (cl->tparent)
                 tcm->tcm_parent = cl->tparent->classid;
@@ -1604,15 +1603,16 @@ cbq_dump_class(struct Qdisc *sch, unsigned long arg,
         tcm->tcm_handle = cl->classid;
         tcm->tcm_info = cl->q->handle;
 
-        nla = (struct nlattr*)b;
-        NLA_PUT(skb, TCA_OPTIONS, 0, NULL);
+        nest = nla_nest_start(skb, TCA_OPTIONS);
+        if (nest == NULL)
+                goto nla_put_failure;
         if (cbq_dump_attr(skb, cl) < 0)
                 goto nla_put_failure;
-        nla->nla_len = skb_tail_pointer(skb) - b;
+        nla_nest_end(skb, nest);
         return skb->len;
 
 nla_put_failure:
-        nlmsg_trim(skb, b);
+        nla_nest_cancel(skb, nest);
         return -1;
 }