[PATCH 2.6 PKT_SCHED] Report qdisc parent to userspace

[Thomas Graf <tgraf@xxxxxxx>]

Report parent classid of a qdisc back to userspace. Without this there
is no way for userspace to see if the qdisc is attached to a class
other than parsing all class trees of the link and check all tcm_info
fields in the leaf classes.

Note: This has nothing to do with __parent.

Signed-off-by: Thomas Graf <tgraf@xxxxxxx>

--- linux-2.6.9-rc2-bk7.orig/include/net/pkt_sched.h    2004-09-21 
23:26:54.000000000 +0200
+++ linux-2.6.9-rc2-bk7/include/net/pkt_sched.h 2004-09-24 14:15:36.000000000 
+0200
@@ -80,6 +80,7 @@
        int                     padded;
        struct Qdisc_ops        *ops;
        u32                     handle;
+       u32                     parent;
        atomic_t                refcnt;
        struct sk_buff_head     q;
        struct net_device       *dev;
--- linux-2.6.9-rc2-bk7.orig/net/sched/sch_api.c        2004-09-21 
23:27:31.000000000 +0200
+++ linux-2.6.9-rc2-bk7/net/sched/sch_api.c     2004-09-24 13:56:03.000000000 
+0200
@@ -702,10 +702,11 @@
                return -ENOENT;
        if (clid == TC_H_INGRESS)
                q = qdisc_create(dev, tcm->tcm_parent, tca, &err);
-        else
+       else
                q = qdisc_create(dev, tcm->tcm_handle, tca, &err);
        if (q == NULL)
                return err;
+       q->parent = clid;
 
 graft:
        if (1) {
@@ -821,7 +822,7 @@
                                q_idx++;
                                continue;
                        }
-                       if (tc_fill_qdisc(skb, q, 0, NETLINK_CB(cb->skb).pid,
+                       if (tc_fill_qdisc(skb, q, q->parent, 
NETLINK_CB(cb->skb).pid,
                                          cb->nlh->nlmsg_seq, NLM_F_MULTI, 
RTM_NEWQDISC) <= 0) {
                                read_unlock_bh(&qdisc_tree_lock);
                                goto done;