From 85c675d0d09a45a135bddd15d7b385f8758c32fb Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 18 May 2024 19:35:05 +0200
Subject: Adding upstream version 6.7.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 net/sched/act_api.c        |   2 +-
 net/sched/act_ct.c         |  41 +++--
 net/sched/act_gate.c       |   1 +
 net/sched/act_mirred.c     | 147 +++++++++--------
 net/sched/cls_api.c        |  35 ++++-
 net/sched/cls_basic.c      |   1 +
 net/sched/cls_cgroup.c     |   1 +
 net/sched/cls_flower.c     |   5 +-
 net/sched/cls_fw.c         |   1 +
 net/sched/cls_route.c      |  38 +++--
 net/sched/cls_u32.c        |   1 +
 net/sched/em_meta.c        |   2 +-
 net/sched/sch_cbs.c        |   1 +
 net/sched/sch_choke.c      |   1 +
 net/sched/sch_drr.c        |   1 +
 net/sched/sch_etf.c        |   1 +
 net/sched/sch_ets.c        |   1 +
 net/sched/sch_fifo.c       |   1 +
 net/sched/sch_fq.c         | 385 +++++++++++++++++++++++++++++++++++----------
 net/sched/sch_fq_pie.c     |   2 +-
 net/sched/sch_frag.c       |   4 +-
 net/sched/sch_generic.c    |   9 +-
 net/sched/sch_gred.c       |   1 +
 net/sched/sch_hfsc.c       |   1 +
 net/sched/sch_htb.c        |   1 +
 net/sched/sch_ingress.c    |   1 +
 net/sched/sch_mqprio.c     |   1 +
 net/sched/sch_mqprio_lib.c |   1 +
 net/sched/sch_multiq.c     |   1 +
 net/sched/sch_netem.c      |   3 +-
 net/sched/sch_plug.c       |   1 +
 net/sched/sch_prio.c       |   1 +
 net/sched/sch_qfq.c        |   5 +-
 net/sched/sch_red.c        |   1 +
 net/sched/sch_sfq.c        |   1 +
 net/sched/sch_skbprio.c    |   1 +
 net/sched/sch_taprio.c     |   3 +-
 net/sched/sch_tbf.c        |   1 +
 net/sched/sch_teql.c       |   1 +
 39 files changed, 492 insertions(+), 214 deletions(-)

(limited to 'net/sched')

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 9d3f26bf04..c39252d61e 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -1098,7 +1098,7 @@ repeat:
 			}
 		} else if (TC_ACT_EXT_CMP(ret, TC_ACT_GOTO_CHAIN)) {
 			if (unlikely(!rcu_access_pointer(a->goto_chain))) {
-				net_warn_ratelimited("can't go to NULL chain!\n");
+				tcf_set_drop_reason(res, SKB_DROP_REASON_TC_ERROR);
 				return TC_ACT_SHOT;
 			}
 			tcf_action_goto_chain_exec(a, res);
diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
index a7b3f60dd0..3d50215985 100644
--- a/net/sched/act_ct.c
+++ b/net/sched/act_ct.c
@@ -734,7 +734,6 @@ static struct tc_action_ops act_ct_ops;
 
 struct tc_ct_action_net {
 	struct tc_action_net tn; /* Must be first */
-	bool labels;
 };
 
 /* Determine whether skb->_nfct is equal to the result of conntrack lookup. */
@@ -872,8 +871,13 @@ static void tcf_ct_params_free(struct tcf_ct_params *params)
 	}
 	if (params->ct_ft)
 		tcf_ct_flow_table_put(params->ct_ft);
-	if (params->tmpl)
+	if (params->tmpl) {
+		if (params->put_labels)
+			nf_connlabels_put(nf_ct_net(params->tmpl));
+
 		nf_ct_put(params->tmpl);
+	}
+
 	kfree(params);
 }
 
@@ -1198,9 +1202,9 @@ static int tcf_ct_fill_params(struct net *net,
 			      struct nlattr **tb,
 			      struct netlink_ext_ack *extack)
 {
-	struct tc_ct_action_net *tn = net_generic(net, act_ct_ops.net_id);
 	struct nf_conntrack_zone zone;
 	int err, family, proto, len;
+	bool put_labels = false;
 	struct nf_conn *tmpl;
 	char *name;
 
@@ -1230,15 +1234,20 @@ static int tcf_ct_fill_params(struct net *net,
 	}
 
 	if (tb[TCA_CT_LABELS]) {
+		unsigned int n_bits = sizeof_field(struct tcf_ct_params, labels) * 8;
+
 		if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
 			NL_SET_ERR_MSG_MOD(extack, "Conntrack labels isn't enabled.");
 			return -EOPNOTSUPP;
 		}
 
-		if (!tn->labels) {
+		if (nf_connlabels_get(net, n_bits - 1)) {
 			NL_SET_ERR_MSG_MOD(extack, "Failed to set connlabel length");
 			return -EOPNOTSUPP;
+		} else {
+			put_labels = true;
 		}
+
 		tcf_ct_set_key_val(tb,
 				   p->labels, TCA_CT_LABELS,
 				   p->labels_mask, TCA_CT_LABELS_MASK,
@@ -1282,10 +1291,15 @@ static int tcf_ct_fill_params(struct net *net,
 		}
 	}
 
+	p->put_labels = put_labels;
+
 	if (p->ct_action & TCA_CT_ACT_COMMIT)
 		__set_bit(IPS_CONFIRMED_BIT, &tmpl->status);
 	return 0;
 err:
+	if (put_labels)
+		nf_connlabels_put(net);
+
 	nf_ct_put(p->tmpl);
 	p->tmpl = NULL;
 	return err;
@@ -1589,32 +1603,13 @@ static struct tc_action_ops act_ct_ops = {
 
 static __net_init int ct_init_net(struct net *net)
 {
-	unsigned int n_bits = sizeof_field(struct tcf_ct_params, labels) * 8;
 	struct tc_ct_action_net *tn = net_generic(net, act_ct_ops.net_id);
 
-	if (nf_connlabels_get(net, n_bits - 1)) {
-		tn->labels = false;
-		pr_err("act_ct: Failed to set connlabels length");
-	} else {
-		tn->labels = true;
-	}
-
 	return tc_action_net_init(net, &tn->tn, &act_ct_ops);
 }
 
 static void __net_exit ct_exit_net(struct list_head *net_list)
 {
-	struct net *net;
-
-	rtnl_lock();
-	list_for_each_entry(net, net_list, exit_list) {
-		struct tc_ct_action_net *tn = net_generic(net, act_ct_ops.net_id);
-
-		if (tn->labels)
-			nf_connlabels_put(net);
-	}
-	rtnl_unlock();
-
 	tc_action_net_exit(net_list, act_ct_ops.net_id);
 }
 
diff --git a/net/sched/act_gate.c b/net/sched/act_gate.c
index c9a811f4c7..393b787292 100644
--- a/net/sched/act_gate.c
+++ b/net/sched/act_gate.c
@@ -677,4 +677,5 @@ static void __exit gate_cleanup_module(void)
 
 module_init(gate_init_module);
 module_exit(gate_cleanup_module);
+MODULE_DESCRIPTION("TC gate action");
 MODULE_LICENSE("GPL v2");
diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c
index 0a711c184c..674f7ae356 100644
--- a/net/sched/act_mirred.c
+++ b/net/sched/act_mirred.c
@@ -206,18 +206,14 @@ release_idr:
 	return err;
 }
 
-static bool is_mirred_nested(void)
-{
-	return unlikely(__this_cpu_read(mirred_nest_level) > 1);
-}
-
-static int tcf_mirred_forward(bool want_ingress, struct sk_buff *skb)
+static int
+tcf_mirred_forward(bool at_ingress, bool want_ingress, struct sk_buff *skb)
 {
 	int err;
 
 	if (!want_ingress)
 		err = tcf_dev_queue_xmit(skb, dev_queue_xmit);
-	else if (is_mirred_nested())
+	else if (!at_ingress)
 		err = netif_rx(skb);
 	else
 		err = netif_receive_skb(skb);
@@ -225,110 +221,123 @@ static int tcf_mirred_forward(bool want_ingress, struct sk_buff *skb)
 	return err;
 }
 
-TC_INDIRECT_SCOPE int tcf_mirred_act(struct sk_buff *skb,
-				     const struct tc_action *a,
-				     struct tcf_result *res)
+static int tcf_mirred_to_dev(struct sk_buff *skb, struct tcf_mirred *m,
+			     struct net_device *dev,
+			     const bool m_mac_header_xmit, int m_eaction,
+			     int retval)
 {
-	struct tcf_mirred *m = to_mirred(a);
-	struct sk_buff *skb2 = skb;
-	bool m_mac_header_xmit;
-	struct net_device *dev;
-	unsigned int nest_level;
-	int retval, err = 0;
-	bool use_reinsert;
+	struct sk_buff *skb_to_send = skb;
 	bool want_ingress;
 	bool is_redirect;
 	bool expects_nh;
 	bool at_ingress;
-	int m_eaction;
+	bool dont_clone;
 	int mac_len;
 	bool at_nh;
+	int err;
 
-	nest_level = __this_cpu_inc_return(mirred_nest_level);
-	if (unlikely(nest_level > MIRRED_NEST_LIMIT)) {
-		net_warn_ratelimited("Packet exceeded mirred recursion limit on dev %s\n",
-				     netdev_name(skb->dev));
-		__this_cpu_dec(mirred_nest_level);
-		return TC_ACT_SHOT;
-	}
-
-	tcf_lastuse_update(&m->tcf_tm);
-	tcf_action_update_bstats(&m->common, skb);
-
-	m_mac_header_xmit = READ_ONCE(m->tcfm_mac_header_xmit);
-	m_eaction = READ_ONCE(m->tcfm_eaction);
-	retval = READ_ONCE(m->tcf_action);
-	dev = rcu_dereference_bh(m->tcfm_dev);
-	if (unlikely(!dev)) {
-		pr_notice_once("tc mirred: target device is gone\n");
-		goto out;
-	}
-
+	is_redirect = tcf_mirred_is_act_redirect(m_eaction);
 	if (unlikely(!(dev->flags & IFF_UP)) || !netif_carrier_ok(dev)) {
 		net_notice_ratelimited("tc mirred to Houston: device %s is down\n",
 				       dev->name);
-		goto out;
+		goto err_cant_do;
 	}
 
 	/* we could easily avoid the clone only if called by ingress and clsact;
 	 * since we can't easily detect the clsact caller, skip clone only for
 	 * ingress - that covers the TC S/W datapath.
 	 */
-	is_redirect = tcf_mirred_is_act_redirect(m_eaction);
 	at_ingress = skb_at_tc_ingress(skb);
-	use_reinsert = at_ingress && is_redirect &&
-		       tcf_mirred_can_reinsert(retval);
-	if (!use_reinsert) {
-		skb2 = skb_clone(skb, GFP_ATOMIC);
-		if (!skb2)
-			goto out;
+	dont_clone = skb_at_tc_ingress(skb) && is_redirect &&
+		tcf_mirred_can_reinsert(retval);
+	if (!dont_clone) {
+		skb_to_send = skb_clone(skb, GFP_ATOMIC);
+		if (!skb_to_send)
+			goto err_cant_do;
 	}
 
 	want_ingress = tcf_mirred_act_wants_ingress(m_eaction);
 
 	/* All mirred/redirected skbs should clear previous ct info */
-	nf_reset_ct(skb2);
+	nf_reset_ct(skb_to_send);
 	if (want_ingress && !at_ingress) /* drop dst for egress -> ingress */
-		skb_dst_drop(skb2);
+		skb_dst_drop(skb_to_send);
 
 	expects_nh = want_ingress || !m_mac_header_xmit;
 	at_nh = skb->data == skb_network_header(skb);
 	if (at_nh != expects_nh) {
-		mac_len = skb_at_tc_ingress(skb) ? skb->mac_len :
+		mac_len = at_ingress ? skb->mac_len :
 			  skb_network_offset(skb);
 		if (expects_nh) {
 			/* target device/action expect data at nh */
-			skb_pull_rcsum(skb2, mac_len);
+			skb_pull_rcsum(skb_to_send, mac_len);
 		} else {
 			/* target device/action expect data at mac */
-			skb_push_rcsum(skb2, mac_len);
+			skb_push_rcsum(skb_to_send, mac_len);
 		}
 	}
 
-	skb2->skb_iif = skb->dev->ifindex;
-	skb2->dev = dev;
+	skb_to_send->skb_iif = skb->dev->ifindex;
+	skb_to_send->dev = dev;
 
-	/* mirror is always swallowed */
 	if (is_redirect) {
-		skb_set_redirected(skb2, skb2->tc_at_ingress);
-
-		/* let's the caller reinsert the packet, if possible */
-		if (use_reinsert) {
-			err = tcf_mirred_forward(want_ingress, skb);
-			if (err)
-				tcf_action_inc_overlimit_qstats(&m->common);
-			__this_cpu_dec(mirred_nest_level);
-			return TC_ACT_CONSUMED;
-		}
+		if (skb == skb_to_send)
+			retval = TC_ACT_CONSUMED;
+
+		skb_set_redirected(skb_to_send, skb_to_send->tc_at_ingress);
+
+		err = tcf_mirred_forward(at_ingress, want_ingress, skb_to_send);
+	} else {
+		err = tcf_mirred_forward(at_ingress, want_ingress, skb_to_send);
 	}
+	if (err)
+		tcf_action_inc_overlimit_qstats(&m->common);
+
+	return retval;
+
+err_cant_do:
+	if (is_redirect)
+		retval = TC_ACT_SHOT;
+	tcf_action_inc_overlimit_qstats(&m->common);
+	return retval;
+}
+
+TC_INDIRECT_SCOPE int tcf_mirred_act(struct sk_buff *skb,
+				     const struct tc_action *a,
+				     struct tcf_result *res)
+{
+	struct tcf_mirred *m = to_mirred(a);
+	int retval = READ_ONCE(m->tcf_action);
+	unsigned int nest_level;
+	bool m_mac_header_xmit;
+	struct net_device *dev;
+	int m_eaction;
 
-	err = tcf_mirred_forward(want_ingress, skb2);
-	if (err) {
-out:
+	nest_level = __this_cpu_inc_return(mirred_nest_level);
+	if (unlikely(nest_level > MIRRED_NEST_LIMIT)) {
+		net_warn_ratelimited("Packet exceeded mirred recursion limit on dev %s\n",
+				     netdev_name(skb->dev));
+		retval = TC_ACT_SHOT;
+		goto dec_nest_level;
+	}
+
+	tcf_lastuse_update(&m->tcf_tm);
+	tcf_action_update_bstats(&m->common, skb);
+
+	dev = rcu_dereference_bh(m->tcfm_dev);
+	if (unlikely(!dev)) {
+		pr_notice_once("tc mirred: target device is gone\n");
 		tcf_action_inc_overlimit_qstats(&m->common);
-		if (tcf_mirred_is_act_redirect(m_eaction))
-			retval = TC_ACT_SHOT;
+		goto dec_nest_level;
 	}
+
+	m_mac_header_xmit = READ_ONCE(m->tcfm_mac_header_xmit);
+	m_eaction = READ_ONCE(m->tcfm_eaction);
+
+	retval = tcf_mirred_to_dev(skb, m, dev, m_mac_header_xmit, m_eaction,
+				   retval);
+
+dec_nest_level:
 	__this_cpu_dec(mirred_nest_level);
 
 	return retval;
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 84e18b5f72..02c594baa1 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -1664,6 +1664,7 @@ static inline int __tcf_classify(struct sk_buff *skb,
 				 int act_index,
 				 u32 *last_executed_chain)
 {
+	u32 orig_reason = res->drop_reason;
 #ifdef CONFIG_NET_CLS_ACT
 	const int max_reclassify_loop = 16;
 	const struct tcf_proto *first_tp;
@@ -1687,12 +1688,16 @@ reclassify:
 			 * time we got here with a cookie from hardware.
 			 */
 			if (unlikely(n->tp != tp || n->tp->chain != n->chain ||
-				     !tp->ops->get_exts))
+				     !tp->ops->get_exts)) {
+				tcf_set_drop_reason(res, SKB_DROP_REASON_TC_ERROR);
 				return TC_ACT_SHOT;
+			}
 
 			exts = tp->ops->get_exts(tp, n->handle);
-			if (unlikely(!exts || n->exts != exts))
+			if (unlikely(!exts || n->exts != exts)) {
+				tcf_set_drop_reason(res, SKB_DROP_REASON_TC_ERROR);
 				return TC_ACT_SHOT;
+			}
 
 			n = NULL;
 			err = tcf_exts_exec_ex(skb, exts, act_index, res);
@@ -1714,12 +1719,20 @@ reclassify:
 			goto reset;
 		}
 #endif
-		if (err >= 0)
+		if (err >= 0) {
+			/* Policy drop or drop reason is over-written by
+			 * classifiers with a bogus value(0) */
+			if (err == TC_ACT_SHOT &&
+			    res->drop_reason == SKB_NOT_DROPPED_YET)
+				tcf_set_drop_reason(res, orig_reason);
 			return err;
+		}
 	}
 
-	if (unlikely(n))
+	if (unlikely(n)) {
+		tcf_set_drop_reason(res, SKB_DROP_REASON_TC_ERROR);
 		return TC_ACT_SHOT;
+	}
 
 	return TC_ACT_UNSPEC; /* signal: continue lookup */
 #ifdef CONFIG_NET_CLS_ACT
@@ -1729,6 +1742,7 @@ reset:
 				       tp->chain->block->index,
 				       tp->prio & 0xffff,
 				       ntohs(tp->protocol));
+		tcf_set_drop_reason(res, SKB_DROP_REASON_TC_ERROR);
 		return TC_ACT_SHOT;
 	}
 
@@ -1765,8 +1779,10 @@ int tcf_classify(struct sk_buff *skb,
 			if (ext->act_miss) {
 				n = tcf_exts_miss_cookie_lookup(ext->act_miss_cookie,
 								&act_index);
-				if (!n)
+				if (!n) {
+					tcf_set_drop_reason(res, SKB_DROP_REASON_TC_ERROR);
 					return TC_ACT_SHOT;
+				}
 
 				chain = n->chain_index;
 			} else {
@@ -1774,8 +1790,10 @@ int tcf_classify(struct sk_buff *skb,
 			}
 
 			fchain = tcf_chain_lookup_rcu(block, chain);
-			if (!fchain)
+			if (!fchain) {
+				tcf_set_drop_reason(res, SKB_DROP_REASON_TC_ERROR);
 				return TC_ACT_SHOT;
+			}
 
 			/* Consume, so cloned/redirect skbs won't inherit ext */
 			skb_ext_del(skb, TC_SKB_EXT);
@@ -1794,8 +1812,11 @@ int tcf_classify(struct sk_buff *skb,
 			struct tc_skb_cb *cb = tc_skb_cb(skb);
 
 			ext = tc_skb_ext_alloc(skb);
-			if (WARN_ON_ONCE(!ext))
+			if (WARN_ON_ONCE(!ext)) {
+				tcf_set_drop_reason(res, SKB_DROP_REASON_TC_ERROR);
 				return TC_ACT_SHOT;
+			}
+
 			ext->chain = last_executed_chain;
 			ext->mru = cb->mru;
 			ext->post_ct = cb->post_ct;
diff --git a/net/sched/cls_basic.c b/net/sched/cls_basic.c
index 1b92c33b5f..a1f5693133 100644
--- a/net/sched/cls_basic.c
+++ b/net/sched/cls_basic.c
@@ -341,4 +341,5 @@ static void __exit exit_basic(void)
 
 module_init(init_basic)
 module_exit(exit_basic)
+MODULE_DESCRIPTION("TC basic classifier");
 MODULE_LICENSE("GPL");
diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index bd9322d719..7ee8dbf49e 100644
--- a/net/sched/cls_cgroup.c
+++ b/net/sched/cls_cgroup.c
@@ -222,4 +222,5 @@ static void __exit exit_cgroup_cls(void)
 
 module_init(init_cgroup_cls);
 module_exit(exit_cgroup_cls);
+MODULE_DESCRIPTION("TC cgroup classifier");
 MODULE_LICENSE("GPL");
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index efb9d2811b..6ee7064c82 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -2460,8 +2460,11 @@ unbind_filter:
 	}
 
 errout_idr:
-	if (!fold)
+	if (!fold) {
+		spin_lock(&tp->lock);
 		idr_remove(&head->handle_idr, fnew->handle);
+		spin_unlock(&tp->lock);
+	}
 	__fl_put(fnew);
 errout_tb:
 	kfree(tb);
diff --git a/net/sched/cls_fw.c b/net/sched/cls_fw.c
index c49d6af0e0..afc534ee0a 100644
--- a/net/sched/cls_fw.c
+++ b/net/sched/cls_fw.c
@@ -446,4 +446,5 @@ static void __exit exit_fw(void)
 
 module_init(init_fw)
 module_exit(exit_fw)
+MODULE_DESCRIPTION("SKB mark based TC classifier");
 MODULE_LICENSE("GPL");
diff --git a/net/sched/cls_route.c b/net/sched/cls_route.c
index 1e20bbd687..12a505db41 100644
--- a/net/sched/cls_route.c
+++ b/net/sched/cls_route.c
@@ -375,9 +375,9 @@ out:
 
 static const struct nla_policy route4_policy[TCA_ROUTE4_MAX + 1] = {
 	[TCA_ROUTE4_CLASSID]	= { .type = NLA_U32 },
-	[TCA_ROUTE4_TO]		= { .type = NLA_U32 },
-	[TCA_ROUTE4_FROM]	= { .type = NLA_U32 },
-	[TCA_ROUTE4_IIF]	= { .type = NLA_U32 },
+	[TCA_ROUTE4_TO]		= NLA_POLICY_MAX(NLA_U32, 0xFF),
+	[TCA_ROUTE4_FROM]	= NLA_POLICY_MAX(NLA_U32, 0xFF),
+	[TCA_ROUTE4_IIF]	= NLA_POLICY_MAX(NLA_U32, 0x7FFF),
 };
 
 static int route4_set_parms(struct net *net, struct tcf_proto *tp,
@@ -397,33 +397,37 @@ static int route4_set_parms(struct net *net, struct tcf_proto *tp,
 		return err;
 
 	if (tb[TCA_ROUTE4_TO]) {
-		if (new && handle & 0x8000)
+		if (new && handle & 0x8000) {
+			NL_SET_ERR_MSG(extack, "Invalid handle");
 			return -EINVAL;
+		}
 		to = nla_get_u32(tb[TCA_ROUTE4_TO]);
-		if (to > 0xFF)
-			return -EINVAL;
 		nhandle = to;
 	}
 
+	if (tb[TCA_ROUTE4_FROM] && tb[TCA_ROUTE4_IIF]) {
+		NL_SET_ERR_MSG_ATTR(extack, tb[TCA_ROUTE4_FROM],
+				    "'from' and 'fromif' are mutually exclusive");
+		return -EINVAL;
+	}
+
 	if (tb[TCA_ROUTE4_FROM]) {
-		if (tb[TCA_ROUTE4_IIF])
-			return -EINVAL;
 		id = nla_get_u32(tb[TCA_ROUTE4_FROM]);
-		if (id > 0xFF)
-			return -EINVAL;
 		nhandle |= id << 16;
 	} else if (tb[TCA_ROUTE4_IIF]) {
 		id = nla_get_u32(tb[TCA_ROUTE4_IIF]);
-		if (id > 0x7FFF)
-			return -EINVAL;
 		nhandle |= (id | 0x8000) << 16;
 	} else
 		nhandle |= 0xFFFF << 16;
 
 	if (handle && new) {
 		nhandle |= handle & 0x7F00;
-		if (nhandle != handle)
+		if (nhandle != handle) {
+			NL_SET_ERR_MSG_FMT(extack,
+					   "Handle mismatch constructed: %x (expected: %x)",
+					   handle, nhandle);
 			return -EINVAL;
+		}
 	}
 
 	if (!nhandle) {
@@ -478,7 +482,6 @@ static int route4_change(struct net *net, struct sk_buff *in_skb,
 	struct route4_filter __rcu **fp;
 	struct route4_filter *fold, *f1, *pfp, *f = NULL;
 	struct route4_bucket *b;
-	struct nlattr *opt = tca[TCA_OPTIONS];
 	struct nlattr *tb[TCA_ROUTE4_MAX + 1];
 	unsigned int h, th;
 	int err;
@@ -489,10 +492,12 @@ static int route4_change(struct net *net, struct sk_buff *in_skb,
 		return -EINVAL;
 	}
 
-	if (opt == NULL)
+	if (NL_REQ_ATTR_CHECK(extack, NULL, tca, TCA_OPTIONS)) {
+		NL_SET_ERR_MSG_MOD(extack, "Missing options");
 		return -EINVAL;
+	}
 
-	err = nla_parse_nested_deprecated(tb, TCA_ROUTE4_MAX, opt,
+	err = nla_parse_nested_deprecated(tb, TCA_ROUTE4_MAX, tca[TCA_OPTIONS],
 					  route4_policy, NULL);
 	if (err < 0)
 		return err;
@@ -679,4 +684,5 @@ static void __exit exit_route4(void)
 
 module_init(init_route4)
 module_exit(exit_route4)
+MODULE_DESCRIPTION("Routing table realm based TC classifier");
 MODULE_LICENSE("GPL");
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 6663e971a1..d5bdfd4a76 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -1489,4 +1489,5 @@ static void __exit exit_u32(void)
 
 module_init(init_u32)
 module_exit(exit_u32)
+MODULE_DESCRIPTION("Universal 32bit based TC Classifier");
 MODULE_LICENSE("GPL");
diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c
index da34fd4c92..09d8afd04a 100644
--- a/net/sched/em_meta.c
+++ b/net/sched/em_meta.c
@@ -546,7 +546,7 @@ META_COLLECTOR(int_sk_prio)
 		*err = -1;
 		return;
 	}
-	dst->value = sk->sk_priority;
+	dst->value = READ_ONCE(sk->sk_priority);
 }
 
 META_COLLECTOR(int_sk_rcvlowat)
diff --git a/net/sched/sch_cbs.c b/net/sched/sch_cbs.c
index cac870eb78..9a0b85190a 100644
--- a/net/sched/sch_cbs.c
+++ b/net/sched/sch_cbs.c
@@ -574,3 +574,4 @@ static void __exit cbs_module_exit(void)
 module_init(cbs_module_init)
 module_exit(cbs_module_exit)
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Credit Based shaper");
diff --git a/net/sched/sch_choke.c b/net/sched/sch_choke.c
index 19c8511259..ae1da08e26 100644
--- a/net/sched/sch_choke.c
+++ b/net/sched/sch_choke.c
@@ -513,3 +513,4 @@ module_init(choke_module_init)
 module_exit(choke_module_exit)
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Choose and keep responsive flows scheduler");
diff --git a/net/sched/sch_drr.c b/net/sched/sch_drr.c
index 19901e77cd..097740a9af 100644
--- a/net/sched/sch_drr.c
+++ b/net/sched/sch_drr.c
@@ -495,3 +495,4 @@ static void __exit drr_exit(void)
 module_init(drr_init);
 module_exit(drr_exit);
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Deficit Round Robin scheduler");
diff --git a/net/sched/sch_etf.c b/net/sched/sch_etf.c
index 61d1f0e32c..4808159a54 100644
--- a/net/sched/sch_etf.c
+++ b/net/sched/sch_etf.c
@@ -513,3 +513,4 @@ static void __exit etf_module_exit(void)
 module_init(etf_module_init)
 module_exit(etf_module_exit)
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Earliest TxTime First (ETF) qdisc");
diff --git a/net/sched/sch_ets.c b/net/sched/sch_ets.c
index b10efeaf06..f7c8849594 100644
--- a/net/sched/sch_ets.c
+++ b/net/sched/sch_ets.c
@@ -826,3 +826,4 @@ static void __exit ets_exit(void)
 module_init(ets_init);
 module_exit(ets_exit);
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Enhanced Transmission Selection(ETS) scheduler");
diff --git a/net/sched/sch_fifo.c b/net/sched/sch_fifo.c
index e1040421b7..450f5c67ac 100644
--- a/net/sched/sch_fifo.c
+++ b/net/sched/sch_fifo.c
@@ -269,3 +269,4 @@ struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops,
 	return q ? : ERR_PTR(err);
 }
 EXPORT_SYMBOL(fifo_create_dflt);
+MODULE_DESCRIPTION("Single queue packet and byte based First In First Out(P/BFIFO) scheduler");
diff --git a/net/sched/sch_fq.c b/net/sched/sch_fq.c
index f59a2cb2c8..3a31c47fea 100644
--- a/net/sched/sch_fq.c
+++ b/net/sched/sch_fq.c
@@ -2,7 +2,7 @@
 /*
  * net/sched/sch_fq.c Fair Queue Packet Scheduler (per flow pacing)
  *
- *  Copyright (C) 2013-2015 Eric Dumazet <edumazet@google.com>
+ *  Copyright (C) 2013-2023 Eric Dumazet <edumazet@google.com>
  *
  *  Meant to be mostly used for locally generated traffic :
  *  Fast classification depends on skb->sk being set before reaching us.
@@ -51,7 +51,8 @@
 #include <net/tcp.h>
 
 struct fq_skb_cb {
-	u64	        time_to_send;
+	u64	time_to_send;
+	u8	band;
 };
 
 static inline struct fq_skb_cb *fq_skb_cb(struct sk_buff *skb)
@@ -73,37 +74,41 @@ struct fq_flow {
 		struct sk_buff *tail;	/* last skb in the list */
 		unsigned long  age;	/* (jiffies | 1UL) when flow was emptied, for gc */
 	};
-	struct rb_node	fq_node;	/* anchor in fq_root[] trees */
+	union {
+		struct rb_node	fq_node;	/* anchor in fq_root[] trees */
+		/* Following field is only used for q->internal,
+		 * because q->internal is not hashed in fq_root[]
+		 */
+		u64		stat_fastpath_packets;
+	};
 	struct sock	*sk;
 	u32		socket_hash;	/* sk_hash */
 	int		qlen;		/* number of packets in flow queue */
 
-/* Second cache line, used in fq_dequeue() */
+/* Second cache line */
 	int		credit;
-	/* 32bit hole on 64bit arches */
-
+	int		band;
 	struct fq_flow *next;		/* next pointer in RR lists */
 
 	struct rb_node  rate_node;	/* anchor in q->delayed tree */
 	u64		time_next_packet;
-} ____cacheline_aligned_in_smp;
+};
 
 struct fq_flow_head {
 	struct fq_flow *first;
 	struct fq_flow *last;
 };
 
-struct fq_sched_data {
+struct fq_perband_flows {
 	struct fq_flow_head new_flows;
-
 	struct fq_flow_head old_flows;
+	int		    credit;
+	int		    quantum; /* based on band nr : 576KB, 192KB, 64KB */
+};
 
-	struct rb_root	delayed;	/* for rate limited flows */
-	u64		time_next_delayed_flow;
-	u64		ktime_cache;	/* copy of last ktime_get_ns() */
-	unsigned long	unthrottle_latency_ns;
+struct fq_sched_data {
+/* Read mostly cache line */
 
-	struct fq_flow	internal;	/* for non classified or high prio packets */
 	u32		quantum;
 	u32		initial_quantum;
 	u32		flow_refill_delay;
@@ -117,24 +122,46 @@ struct fq_sched_data {
 	u8		rate_enable;
 	u8		fq_trees_log;
 	u8		horizon_drop;
+	u8		prio2band[(TC_PRIO_MAX + 1) >> 2];
+	u32		timer_slack; /* hrtimer slack in ns */
+
+/* Read/Write fields. */
+
+	unsigned int band_nr; /* band being serviced in fq_dequeue() */
+
+	struct fq_perband_flows band_flows[FQ_BANDS];
+
+	struct fq_flow	internal;	/* fastpath queue. */
+	struct rb_root	delayed;	/* for rate limited flows */
+	u64		time_next_delayed_flow;
+	unsigned long	unthrottle_latency_ns;
+
+	u32		band_pkt_count[FQ_BANDS];
 	u32		flows;
-	u32		inactive_flows;
+	u32		inactive_flows; /* Flows with no packet to send. */
 	u32		throttled_flows;
 
-	u64		stat_gc_flows;
-	u64		stat_internal_packets;
 	u64		stat_throttled;
+	struct qdisc_watchdog watchdog;
+	u64		stat_gc_flows;
+
+/* Seldom used fields. */
+
+	u64		stat_band_drops[FQ_BANDS];
 	u64		stat_ce_mark;
 	u64		stat_horizon_drops;
 	u64		stat_horizon_caps;
 	u64		stat_flows_plimit;
 	u64		stat_pkts_too_long;
 	u64		stat_allocation_errors;
-
-	u32		timer_slack; /* hrtimer slack in ns */
-	struct qdisc_watchdog watchdog;
 };
 
+/* return the i-th 2-bit value ("crumb") */
+static u8 fq_prio2band(const u8 *prio2band, unsigned int prio)
+{
+	return (prio2band[prio / 4] >> (2 * (prio & 0x3))) & 0x3;
+}
+
 /*
  * f->tail and f->age share the same location.
  * We can use the low order bit to differentiate if this location points
@@ -159,8 +186,19 @@ static bool fq_flow_is_throttled(const struct fq_flow *f)
 	return f->next == &throttled;
 }
 
-static void fq_flow_add_tail(struct fq_flow_head *head, struct fq_flow *flow)
+enum new_flow {
+	NEW_FLOW,
+	OLD_FLOW
+};
+
+static void fq_flow_add_tail(struct fq_sched_data *q, struct fq_flow *flow,
+			     enum new_flow list_sel)
 {
+	struct fq_perband_flows *pband = &q->band_flows[flow->band];
+	struct fq_flow_head *head = (list_sel == NEW_FLOW) ?
+					&pband->new_flows :
+					&pband->old_flows;
+
 	if (head->first)
 		head->last->next = flow;
 	else
@@ -173,7 +211,7 @@ static void fq_flow_unset_throttled(struct fq_sched_data *q, struct fq_flow *f)
 {
 	rb_erase(&f->rate_node, &q->delayed);
 	q->throttled_flows--;
-	fq_flow_add_tail(&q->old_flows, f);
+	fq_flow_add_tail(q, f, OLD_FLOW);
 }
 
 static void fq_flow_set_throttled(struct fq_sched_data *q, struct fq_flow *f)
@@ -258,17 +296,61 @@ static void fq_gc(struct fq_sched_data *q,
 	kmem_cache_free_bulk(fq_flow_cachep, fcnt, tofree);
 }
 
-static struct fq_flow *fq_classify(struct sk_buff *skb, struct fq_sched_data *q)
+/* Fast path can be used if :
+ * 1) Packet tstamp is in the past.
+ * 2) FQ qlen == 0   OR
+ *   (no flow is currently eligible for transmit,
+ *    AND fast path queue has less than 8 packets)
+ * 3) No SO_MAX_PACING_RATE on the socket (if any).
+ * 4) No @maxrate attribute on this qdisc,
+ *
+ * FQ can not use generic TCQ_F_CAN_BYPASS infrastructure.
+ */
+static bool fq_fastpath_check(const struct Qdisc *sch, struct sk_buff *skb,
+			      u64 now)
 {
+	const struct fq_sched_data *q = qdisc_priv(sch);
+	const struct sock *sk;
+
+	if (fq_skb_cb(skb)->time_to_send > now)
+		return false;
+
+	if (sch->q.qlen != 0) {
+		/* Even if some packets are stored in this qdisc,
+		 * we can still enable fast path if all of them are
+		 * scheduled in the future (ie no flows are eligible)
+		 * or in the fast path queue.
+		 */
+		if (q->flows != q->inactive_flows + q->throttled_flows)
+			return false;
+
+		/* Do not allow fast path queue to explode, we want Fair Queue mode
+		 * under pressure.
+		 */
+		if (q->internal.qlen >= 8)
+			return false;
+	}
+
+	sk = skb->sk;
+	if (sk && sk_fullsock(sk) && !sk_is_tcp(sk) &&
+	    sk->sk_max_pacing_rate != ~0UL)
+		return false;
+
+	if (q->flow_max_rate != ~0UL)
+		return false;
+
+	return true;
+}
+
+static struct fq_flow *fq_classify(struct Qdisc *sch, struct sk_buff *skb,
+				   u64 now)
+{
+	struct fq_sched_data *q = qdisc_priv(sch);
 	struct rb_node **p, *parent;
 	struct sock *sk = skb->sk;
 	struct rb_root *root;
 	struct fq_flow *f;
 
-	/* warning: no starvation prevention... */
-	if (unlikely((skb->priority & TC_PRIO_MAX) == TC_PRIO_CONTROL))
-		return &q->internal;
-
 	/* SYNACK messages are attached to a TCP_NEW_SYN_RECV request socket
 	 * or a listener (SYNCOOKIE mode)
 	 * 1) request sockets are not full blown,
@@ -299,11 +381,18 @@ static struct fq_flow *fq_classify(struct sk_buff *skb, struct fq_sched_data *q)
 		sk = (struct sock *)((hash << 1) | 1UL);
 	}
 
+	if (fq_fastpath_check(sch, skb, now)) {
+		q->internal.stat_fastpath_packets++;
+		if (skb->sk == sk && q->rate_enable &&
+		    READ_ONCE(sk->sk_pacing_status) != SK_PACING_FQ)
+			smp_store_release(&sk->sk_pacing_status,
+					  SK_PACING_FQ);
+		return &q->internal;
+	}
+
 	root = &q->fq_root[hash_ptr(sk, q->fq_trees_log)];
 
-	if (q->flows >= (2U << q->fq_trees_log) &&
-	    q->inactive_flows > q->flows/2)
-		fq_gc(q, root, sk);
+	fq_gc(q, root, sk);
 
 	p = &root->rb_node;
 	parent = NULL;
@@ -396,7 +485,6 @@ static void fq_dequeue_skb(struct Qdisc *sch, struct fq_flow *flow,
 {
 	fq_erase_head(sch, flow, skb);
 	skb_mark_not_on_list(skb);
-	flow->qlen--;
 	qdisc_qstats_backlog_dec(sch, skb);
 	sch->q.qlen--;
 }
@@ -434,9 +522,9 @@ static void flow_queue_add(struct fq_flow *flow, struct sk_buff *skb)
 }
 
 static bool fq_packet_beyond_horizon(const struct sk_buff *skb,
-				    const struct fq_sched_data *q)
+				     const struct fq_sched_data *q, u64 now)
 {
-	return unlikely((s64)skb->tstamp > (s64)(q->ktime_cache + q->horizon));
+	return unlikely((s64)skb->tstamp > (s64)(now + q->horizon));
 }
 
 static int fq_enqueue(struct sk_buff *skb, struct Qdisc *sch,
@@ -444,53 +532,57 @@ static int fq_enqueue(struct sk_buff *skb, struct Qdisc *sch,
 {
 	struct fq_sched_data *q = qdisc_priv(sch);
 	struct fq_flow *f;
+	u64 now;
+	u8 band;
 
-	if (unlikely(sch->q.qlen >= sch->limit))
+	band = fq_prio2band(q->prio2band, skb->priority & TC_PRIO_MAX);
+	if (unlikely(q->band_pkt_count[band] >= sch->limit)) {
+		q->stat_band_drops[band]++;
 		return qdisc_drop(skb, sch, to_free);
+	}
 
+	now = ktime_get_ns();
 	if (!skb->tstamp) {
-		fq_skb_cb(skb)->time_to_send = q->ktime_cache = ktime_get_ns();
+		fq_skb_cb(skb)->time_to_send = now;
 	} else {
-		/* Check if packet timestamp is too far in the future.
-		 * Try first if our cached value, to avoid ktime_get_ns()
-		 * cost in most cases.
-		 */
-		if (fq_packet_beyond_horizon(skb, q)) {
-			/* Refresh our cache and check another time */
-			q->ktime_cache = ktime_get_ns();
-			if (fq_packet_beyond_horizon(skb, q)) {
-				if (q->horizon_drop) {
+		/* Check if packet timestamp is too far in the future. */
+		if (fq_packet_beyond_horizon(skb, q, now)) {
+			if (q->horizon_drop) {
 					q->stat_horizon_drops++;
 					return qdisc_drop(skb, sch, to_free);
-				}
-				q->stat_horizon_caps++;
-				skb->tstamp = q->ktime_cache + q->horizon;
 			}
+			q->stat_horizon_caps++;
+			skb->tstamp = now + q->horizon;
 		}
 		fq_skb_cb(skb)->time_to_send = skb->tstamp;
 	}
 
-	f = fq_classify(skb, q);
-	if (unlikely(f->qlen >= q->flow_plimit && f != &q->internal)) {
-		q->stat_flows_plimit++;
-		return qdisc_drop(skb, sch, to_free);
-	}
+	f = fq_classify(sch, skb, now);
 
-	f->qlen++;
-	qdisc_qstats_backlog_inc(sch, skb);
-	if (fq_flow_is_detached(f)) {
-		fq_flow_add_tail(&q->new_flows, f);
-		if (time_after(jiffies, f->age + q->flow_refill_delay))
-			f->credit = max_t(u32, f->credit, q->quantum);
-		q->inactive_flows--;
+	if (f != &q->internal) {
+		if (unlikely(f->qlen >= q->flow_plimit)) {
+			q->stat_flows_plimit++;
+			return qdisc_drop(skb, sch, to_free);
+		}
+
+		if (fq_flow_is_detached(f)) {
+			fq_flow_add_tail(q, f, NEW_FLOW);
+			if (time_after(jiffies, f->age + q->flow_refill_delay))
+				f->credit = max_t(u32, f->credit, q->quantum);
+		}
+
+		f->band = band;
+		q->band_pkt_count[band]++;
+		fq_skb_cb(skb)->band = band;
+		if (f->qlen == 0)
+			q->inactive_flows--;
 	}
 
+	f->qlen++;
 	/* Note: this overwrites f->age */
 	flow_queue_add(f, skb);
 
-	if (unlikely(f == &q->internal)) {
-		q->stat_internal_packets++;
-	}
+	qdisc_qstats_backlog_inc(sch, skb);
 	sch->q.qlen++;
 
 	return NET_XMIT_SUCCESS;
@@ -523,13 +615,26 @@ static void fq_check_throttled(struct fq_sched_data *q, u64 now)
 	}
 }
 
+static struct fq_flow_head *fq_pband_head_select(struct fq_perband_flows *pband)
+{
+	if (pband->credit <= 0)
+		return NULL;
+
+	if (pband->new_flows.first)
+		return &pband->new_flows;
+
+	return pband->old_flows.first ? &pband->old_flows : NULL;
+}
+
 static struct sk_buff *fq_dequeue(struct Qdisc *sch)
 {
 	struct fq_sched_data *q = qdisc_priv(sch);
+	struct fq_perband_flows *pband;
 	struct fq_flow_head *head;
 	struct sk_buff *skb;
 	struct fq_flow *f;
 	unsigned long rate;
+	int retry;
 	u32 plen;
 	u64 now;
 
@@ -538,30 +643,38 @@ static struct sk_buff *fq_dequeue(struct Qdisc *sch)
 
 	skb = fq_peek(&q->internal);
 	if (unlikely(skb)) {
+		q->internal.qlen--;
 		fq_dequeue_skb(sch, &q->internal, skb);
 		goto out;
 	}
 
-	q->ktime_cache = now = ktime_get_ns();
+	now = ktime_get_ns();
 	fq_check_throttled(q, now);
+	retry = 0;
+	pband = &q->band_flows[q->band_nr];
 begin:
-	head = &q->new_flows;
-	if (!head->first) {
-		head = &q->old_flows;
-		if (!head->first) {
-			if (q->time_next_delayed_flow != ~0ULL)
-				qdisc_watchdog_schedule_range_ns(&q->watchdog,
+	head = fq_pband_head_select(pband);
+	if (!head) {
+		while (++retry <= FQ_BANDS) {
+			if (++q->band_nr == FQ_BANDS)
+				q->band_nr = 0;
+			pband = &q->band_flows[q->band_nr];
+			pband->credit = min(pband->credit + pband->quantum,
+					    pband->quantum);
+			goto begin;
+		}
+		if (q->time_next_delayed_flow != ~0ULL)
+			qdisc_watchdog_schedule_range_ns(&q->watchdog,
 							q->time_next_delayed_flow,
 							q->timer_slack);
-			return NULL;
-		}
+		return NULL;
 	}
 	f = head->first;
-
+	retry = 0;
 	if (f->credit <= 0) {
 		f->credit += q->quantum;
 		head->first = f->next;
-		fq_flow_add_tail(&q->old_flows, f);
+		fq_flow_add_tail(q, f, OLD_FLOW);
 		goto begin;
 	}
 
@@ -581,20 +694,23 @@ begin:
 			INET_ECN_set_ce(skb);
 			q->stat_ce_mark++;
 		}
+		if (--f->qlen == 0)
+			q->inactive_flows++;
+		q->band_pkt_count[fq_skb_cb(skb)->band]--;
 		fq_dequeue_skb(sch, f, skb);
 	} else {
 		head->first = f->next;
 		/* force a pass through old_flows to prevent starvation */
-		if ((head == &q->new_flows) && q->old_flows.first) {
-			fq_flow_add_tail(&q->old_flows, f);
+		if (head == &pband->new_flows) {
+			fq_flow_add_tail(q, f, OLD_FLOW);
 		} else {
 			fq_flow_set_detached(f);
-			q->inactive_flows++;
 		}
 		goto begin;
 	}
 	plen = qdisc_pkt_len(skb);
 	f->credit -= plen;
+	pband->credit -= plen;
 
 	if (!q->rate_enable)
 		goto out;
@@ -607,7 +723,7 @@ begin:
 	 */
 	if (!skb->tstamp) {
 		if (skb->sk)
-			rate = min(skb->sk->sk_pacing_rate, rate);
+			rate = min(READ_ONCE(skb->sk->sk_pacing_rate), rate);
 
 		if (rate <= q->low_rate_threshold) {
 			f->credit = 0;
@@ -686,8 +802,10 @@ static void fq_reset(struct Qdisc *sch)
 			kmem_cache_free(fq_flow_cachep, f);
 		}
 	}
-	q->new_flows.first	= NULL;
-	q->old_flows.first	= NULL;
+	for (idx = 0; idx < FQ_BANDS; idx++) {
+		q->band_flows[idx].new_flows.first = NULL;
+		q->band_flows[idx].old_flows.first = NULL;
+	}
 	q->delayed		= RB_ROOT;
 	q->flows		= 0;
 	q->inactive_flows	= 0;
@@ -779,7 +897,7 @@ static int fq_resize(struct Qdisc *sch, u32 log)
 	return 0;
 }
 
-static struct netlink_range_validation iq_range = {
+static const struct netlink_range_validation iq_range = {
 	.max = INT_MAX,
 };
 
@@ -801,8 +919,71 @@ static const struct nla_policy fq_policy[TCA_FQ_MAX + 1] = {
 	[TCA_FQ_TIMER_SLACK]		= { .type = NLA_U32 },
 	[TCA_FQ_HORIZON]		= { .type = NLA_U32 },
 	[TCA_FQ_HORIZON_DROP]		= { .type = NLA_U8 },
+	[TCA_FQ_PRIOMAP]		= NLA_POLICY_EXACT_LEN(sizeof(struct tc_prio_qopt)),
+	[TCA_FQ_WEIGHTS]		= NLA_POLICY_EXACT_LEN(FQ_BANDS * sizeof(s32)),
 };
 
+/* compress a u8 array with all elems <= 3 to an array of 2-bit fields */
+static void fq_prio2band_compress_crumb(const u8 *in, u8 *out)
+{
+	const int num_elems = TC_PRIO_MAX + 1;
+	int i;
+
+	memset(out, 0, num_elems / 4);
+	for (i = 0; i < num_elems; i++)
+		out[i / 4] |= in[i] << (2 * (i & 0x3));
+}
+
+static void fq_prio2band_decompress_crumb(const u8 *in, u8 *out)
+{
+	const int num_elems = TC_PRIO_MAX + 1;
+	int i;
+
+	for (i = 0; i < num_elems; i++)
+		out[i] = fq_prio2band(in, i);
+}
+
+static int fq_load_weights(struct fq_sched_data *q,
+			   const struct nlattr *attr,
+			   struct netlink_ext_ack *extack)
+{
+	s32 *weights = nla_data(attr);
+	int i;
+
+	for (i = 0; i < FQ_BANDS; i++) {
+		if (weights[i] < FQ_MIN_WEIGHT) {
+			NL_SET_ERR_MSG_FMT_MOD(extack, "Weight %d less that minimum allowed %d",
+					       weights[i], FQ_MIN_WEIGHT);
+			return -EINVAL;
+		}
+	}
+	for (i = 0; i < FQ_BANDS; i++)
+		q->band_flows[i].quantum = weights[i];
+	return 0;
+}
+
+static int fq_load_priomap(struct fq_sched_data *q,
+			   const struct nlattr *attr,
+			   struct netlink_ext_ack *extack)
+{
+	const struct tc_prio_qopt *map = nla_data(attr);
+	int i;
+
+	if (map->bands != FQ_BANDS) {
+		NL_SET_ERR_MSG_MOD(extack, "FQ only supports 3 bands");
+		return -EINVAL;
+	}
+	for (i = 0; i < TC_PRIO_MAX + 1; i++) {
+		if (map->priomap[i] >= FQ_BANDS) {
+			NL_SET_ERR_MSG_FMT_MOD(extack, "FQ priomap field %d maps to a too high band %d",
+					       i, map->priomap[i]);
+			return -EINVAL;
+		}
+	}
+	fq_prio2band_compress_crumb(map->priomap, q->prio2band);
+	return 0;
+}
+
 static int fq_change(struct Qdisc *sch, struct nlattr *opt,
 		     struct netlink_ext_ack *extack)
 {
@@ -877,6 +1058,12 @@ static int fq_change(struct Qdisc *sch, struct nlattr *opt,
 		q->flow_refill_delay = usecs_to_jiffies(usecs_delay);
 	}
 
+	if (!err && tb[TCA_FQ_PRIOMAP])
+		err = fq_load_priomap(q, tb[TCA_FQ_PRIOMAP], extack);
+
+	if (!err && tb[TCA_FQ_WEIGHTS])
+		err = fq_load_weights(q, tb[TCA_FQ_WEIGHTS], extack);
+
 	if (tb[TCA_FQ_ORPHAN_MASK])
 		q->orphan_mask = nla_get_u32(tb[TCA_FQ_ORPHAN_MASK]);
 
@@ -928,7 +1115,7 @@ static int fq_init(struct Qdisc *sch, struct nlattr *opt,
 		   struct netlink_ext_ack *extack)
 {
 	struct fq_sched_data *q = qdisc_priv(sch);
-	int err;
+	int i, err;
 
 	sch->limit		= 10000;
 	q->flow_plimit		= 100;
@@ -938,8 +1125,13 @@ static int fq_init(struct Qdisc *sch, struct nlattr *opt,
 	q->flow_max_rate	= ~0UL;
 	q->time_next_delayed_flow = ~0ULL;
 	q->rate_enable		= 1;
-	q->new_flows.first	= NULL;
-	q->old_flows.first	= NULL;
+	for (i = 0; i < FQ_BANDS; i++) {
+		q->band_flows[i].new_flows.first = NULL;
+		q->band_flows[i].old_flows.first = NULL;
+	}
+	q->band_flows[0].quantum = 9 << 16;
+	q->band_flows[1].quantum = 3 << 16;
+	q->band_flows[2].quantum = 1 << 16;
 	q->delayed		= RB_ROOT;
 	q->fq_root		= NULL;
 	q->fq_trees_log		= ilog2(1024);
@@ -954,6 +1146,7 @@ static int fq_init(struct Qdisc *sch, struct nlattr *opt,
 	/* Default ce_threshold of 4294 seconds */
 	q->ce_threshold		= (u64)NSEC_PER_USEC * ~0U;
 
+	fq_prio2band_compress_crumb(sch_default_prio2band, q->prio2band);
 	qdisc_watchdog_init_clockid(&q->watchdog, sch, CLOCK_MONOTONIC);
 
 	if (opt)
@@ -968,8 +1161,12 @@ static int fq_dump(struct Qdisc *sch, struct sk_buff *skb)
 {
 	struct fq_sched_data *q = qdisc_priv(sch);
 	u64 ce_threshold = q->ce_threshold;
+	struct tc_prio_qopt prio = {
+		.bands = FQ_BANDS,
+	};
 	u64 horizon = q->horizon;
 	struct nlattr *opts;
+	s32 weights[3];
 
 	opts = nla_nest_start_noflag(skb, TCA_OPTIONS);
 	if (opts == NULL)
@@ -999,6 +1196,16 @@ static int fq_dump(struct Qdisc *sch, struct sk_buff *skb)
 	    nla_put_u8(skb, TCA_FQ_HORIZON_DROP, q->horizon_drop))
 		goto nla_put_failure;
 
+	fq_prio2band_decompress_crumb(q->prio2band, prio.priomap);
+	if (nla_put(skb, TCA_FQ_PRIOMAP, sizeof(prio), &prio))
+		goto nla_put_failure;
+
+	weights[0] = q->band_flows[0].quantum;
+	weights[1] = q->band_flows[1].quantum;
+	weights[2] = q->band_flows[2].quantum;
+	if (nla_put(skb, TCA_FQ_WEIGHTS, sizeof(weights), &weights))
+		goto nla_put_failure;
+
 	return nla_nest_end(skb, opts);
 
 nla_put_failure:
@@ -1009,11 +1216,15 @@ static int fq_dump_stats(struct Qdisc *sch, struct gnet_dump *d)
 {
 	struct fq_sched_data *q = qdisc_priv(sch);
 	struct tc_fq_qd_stats st;
+	int i;
+
+	st.pad = 0;
 
 	sch_tree_lock(sch);
 
 	st.gc_flows		  = q->stat_gc_flows;
-	st.highprio_packets	  = q->stat_internal_packets;
+	st.highprio_packets	  = 0;
+	st.fastpath_packets	  = q->internal.stat_fastpath_packets;
 	st.tcp_retrans		  = 0;
 	st.throttled		  = q->stat_throttled;
 	st.flows_plimit		  = q->stat_flows_plimit;
@@ -1029,6 +1240,10 @@ static int fq_dump_stats(struct Qdisc *sch, struct gnet_dump *d)
 	st.ce_mark		  = q->stat_ce_mark;
 	st.horizon_drops	  = q->stat_horizon_drops;
 	st.horizon_caps		  = q->stat_horizon_caps;
+	for (i = 0; i < FQ_BANDS; i++) {
+		st.band_drops[i]  = q->stat_band_drops[i];
+		st.band_pkt_count[i] = q->band_pkt_count[i];
+	}
 	sch_tree_unlock(sch);
 
 	return gnet_stats_copy_app(d, &st, sizeof(st));
@@ -1056,7 +1271,7 @@ static int __init fq_module_init(void)
 
 	fq_flow_cachep = kmem_cache_create("fq_flow_cache",
 					   sizeof(struct fq_flow),
-					   0, 0, NULL);
+					   0, SLAB_HWCACHE_ALIGN, NULL);
 	if (!fq_flow_cachep)
 		return -ENOMEM;
 
diff --git a/net/sched/sch_fq_pie.c b/net/sched/sch_fq_pie.c
index 68e6acd0f1..5b595773e5 100644
--- a/net/sched/sch_fq_pie.c
+++ b/net/sched/sch_fq_pie.c
@@ -202,7 +202,7 @@ out:
 	return NET_XMIT_CN;
 }
 
-static struct netlink_range_validation fq_pie_q_range = {
+static const struct netlink_range_validation fq_pie_q_range = {
 	.min = 1,
 	.max = 1 << 20,
 };
diff --git a/net/sched/sch_frag.c b/net/sched/sch_frag.c
index a9bd0a2358..ce63414185 100644
--- a/net/sched/sch_frag.c
+++ b/net/sched/sch_frag.c
@@ -96,7 +96,7 @@ static int sch_fragment(struct net *net, struct sk_buff *skb,
 		unsigned long orig_dst;
 
 		sch_frag_prepare_frag(skb, xmit);
-		dst_init(&sch_frag_rt.dst, &sch_frag_dst_ops, NULL, 1,
+		dst_init(&sch_frag_rt.dst, &sch_frag_dst_ops, NULL,
 			 DST_OBSOLETE_NONE, DST_NOCOUNT);
 		sch_frag_rt.dst.dev = skb->dev;
 
@@ -112,7 +112,7 @@ static int sch_fragment(struct net *net, struct sk_buff *skb,
 
 		sch_frag_prepare_frag(skb, xmit);
 		memset(&sch_frag_rt, 0, sizeof(sch_frag_rt));
-		dst_init(&sch_frag_rt.dst, &sch_frag_dst_ops, NULL, 1,
+		dst_init(&sch_frag_rt.dst, &sch_frag_dst_ops, NULL,
 			 DST_OBSOLETE_NONE, DST_NOCOUNT);
 		sch_frag_rt.dst.dev = skb->dev;
 
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 5d7e23f4cc..4195a4bc26 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -694,9 +694,10 @@ struct Qdisc_ops noqueue_qdisc_ops __read_mostly = {
 	.owner		=	THIS_MODULE,
 };
 
-static const u8 prio2band[TC_PRIO_MAX + 1] = {
-	1, 2, 2, 2, 1, 2, 0, 0 , 1, 1, 1, 1, 1, 1, 1, 1
+const u8 sch_default_prio2band[TC_PRIO_MAX + 1] = {
+	1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1
 };
+EXPORT_SYMBOL(sch_default_prio2band);
 
 /* 3-band FIFO queue: old style, but should be a bit faster than
    generic prio+fifo combination.
@@ -721,7 +722,7 @@ static inline struct skb_array *band2list(struct pfifo_fast_priv *priv,
 static int pfifo_fast_enqueue(struct sk_buff *skb, struct Qdisc *qdisc,
 			      struct sk_buff **to_free)
 {
-	int band = prio2band[skb->priority & TC_PRIO_MAX];
+	int band = sch_default_prio2band[skb->priority & TC_PRIO_MAX];
 	struct pfifo_fast_priv *priv = qdisc_priv(qdisc);
 	struct skb_array *q = band2list(priv, band);
 	unsigned int pkt_len = qdisc_pkt_len(skb);
@@ -830,7 +831,7 @@ static int pfifo_fast_dump(struct Qdisc *qdisc, struct sk_buff *skb)
 {
 	struct tc_prio_qopt opt = { .bands = PFIFO_FAST_BANDS };
 
-	memcpy(&opt.priomap, prio2band, TC_PRIO_MAX + 1);
+	memcpy(&opt.priomap, sch_default_prio2band, TC_PRIO_MAX + 1);
 	if (nla_put(skb, TCA_OPTIONS, sizeof(opt), &opt))
 		goto nla_put_failure;
 	return skb->len;
diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c
index 872d127c9d..8c61eb3dc9 100644
--- a/net/sched/sch_gred.c
+++ b/net/sched/sch_gred.c
@@ -945,3 +945,4 @@ module_init(gred_module_init)
 module_exit(gred_module_exit)
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Generic Random Early Detection qdisc");
diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index 880c5f16b2..16c45da403 100644
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -1693,5 +1693,6 @@ hfsc_cleanup(void)
 }
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Hierarchical Fair Service Curve scheduler");
 module_init(hfsc_init);
 module_exit(hfsc_cleanup);
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 0d947414e6..7349233eaa 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -2179,3 +2179,4 @@ static void __exit htb_module_exit(void)
 module_init(htb_module_init)
 module_exit(htb_module_exit)
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Hierarchical Token Bucket scheduler");
diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c
index a463a63192..5fa9eaa79b 100644
--- a/net/sched/sch_ingress.c
+++ b/net/sched/sch_ingress.c
@@ -370,3 +370,4 @@ module_exit(ingress_module_exit);
 
 MODULE_ALIAS("sch_clsact");
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Ingress and clsact based ingress and egress qdiscs");
diff --git a/net/sched/sch_mqprio.c b/net/sched/sch_mqprio.c
index 793009f445..43e53ee00a 100644
--- a/net/sched/sch_mqprio.c
+++ b/net/sched/sch_mqprio.c
@@ -789,3 +789,4 @@ module_init(mqprio_module_init);
 module_exit(mqprio_module_exit);
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Classful multiqueue prio qdisc");
diff --git a/net/sched/sch_mqprio_lib.c b/net/sched/sch_mqprio_lib.c
index 83b3793c40..b3a5572c16 100644
--- a/net/sched/sch_mqprio_lib.c
+++ b/net/sched/sch_mqprio_lib.c
@@ -129,3 +129,4 @@ void mqprio_fp_to_offload(u32 fp[TC_QOPT_MAX_QUEUE],
 EXPORT_SYMBOL_GPL(mqprio_fp_to_offload);
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Shared mqprio qdisc code currently between taprio and mqprio");
diff --git a/net/sched/sch_multiq.c b/net/sched/sch_multiq.c
index 75c9c86018..d66d5f0ec0 100644
--- a/net/sched/sch_multiq.c
+++ b/net/sched/sch_multiq.c
@@ -410,3 +410,4 @@ module_init(multiq_module_init)
 module_exit(multiq_module_exit)
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Multi queue to hardware queue mapping qdisc");
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 4ad39a4a3c..fa678eb885 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -67,7 +67,7 @@
 
 struct disttable {
 	u32  size;
-	s16 table[];
+	s16 table[] __counted_by(size);
 };
 
 struct netem_sched_data {
@@ -1307,3 +1307,4 @@ static void __exit netem_module_exit(void)
 module_init(netem_module_init)
 module_exit(netem_module_exit)
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Network characteristics emulator qdisc");
diff --git a/net/sched/sch_plug.c b/net/sched/sch_plug.c
index 35f49edf63..992f0c8d79 100644
--- a/net/sched/sch_plug.c
+++ b/net/sched/sch_plug.c
@@ -226,3 +226,4 @@ static void __exit plug_module_exit(void)
 module_init(plug_module_init)
 module_exit(plug_module_exit)
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Qdisc to plug and unplug traffic via netlink control");
diff --git a/net/sched/sch_prio.c b/net/sched/sch_prio.c
index fdc5ef52c3..8ecdd3ef6f 100644
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -433,3 +433,4 @@ module_init(prio_module_init)
 module_exit(prio_module_exit)
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Simple 3-band priority qdisc");
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index 546c10adca..48a604c320 100644
--- a/net/sched/sch_qfq.c
+++ b/net/sched/sch_qfq.c
@@ -213,7 +213,7 @@ static struct qfq_class *qfq_find_class(struct Qdisc *sch, u32 classid)
 	return container_of(clc, struct qfq_class, common);
 }
 
-static struct netlink_range_validation lmax_range = {
+static const struct netlink_range_validation lmax_range = {
 	.min = QFQ_MIN_LMAX,
 	.max = QFQ_MAX_LMAX,
 };
@@ -1003,7 +1003,7 @@ static inline struct sk_buff *qfq_peek_skb(struct qfq_aggregate *agg,
 	*cl = list_first_entry(&agg->active, struct qfq_class, alist);
 	skb = (*cl)->qdisc->ops->peek((*cl)->qdisc);
 	if (skb == NULL)
-		WARN_ONCE(1, "qfq_dequeue: non-workconserving leaf\n");
+		qdisc_warn_nonwc("qfq_dequeue", (*cl)->qdisc);
 	else
 		*len = qdisc_pkt_len(skb);
 
@@ -1535,3 +1535,4 @@ static void __exit qfq_exit(void)
 module_init(qfq_init);
 module_exit(qfq_exit);
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Quick Fair Queueing Plus qdisc");
diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index 16277b6a02..607b6c8b3a 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -563,3 +563,4 @@ module_init(red_module_init)
 module_exit(red_module_exit)
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Random Early Detection qdisc");
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index 66dcb18638..eb77558fa3 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -937,3 +937,4 @@ static void __exit sfq_module_exit(void)
 module_init(sfq_module_init)
 module_exit(sfq_module_exit)
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Stochastic Fairness qdisc");
diff --git a/net/sched/sch_skbprio.c b/net/sched/sch_skbprio.c
index 5df2dacb7b..28beb11762 100644
--- a/net/sched/sch_skbprio.c
+++ b/net/sched/sch_skbprio.c
@@ -307,3 +307,4 @@ module_init(skbprio_module_init)
 module_exit(skbprio_module_exit)
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SKB priority based scheduling qdisc");
diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c
index 1cb5e41c0e..31a8252bd0 100644
--- a/net/sched/sch_taprio.c
+++ b/net/sched/sch_taprio.c
@@ -1015,7 +1015,7 @@ static const struct nla_policy taprio_tc_policy[TCA_TAPRIO_TC_ENTRY_MAX + 1] = {
 							      TC_FP_PREEMPTIBLE),
 };
 
-static struct netlink_range_validation_signed taprio_cycle_time_range = {
+static const struct netlink_range_validation_signed taprio_cycle_time_range = {
 	.min = 0,
 	.max = INT_MAX,
 };
@@ -2572,3 +2572,4 @@ static void __exit taprio_module_exit(void)
 module_init(taprio_module_init);
 module_exit(taprio_module_exit);
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Time Aware Priority qdisc");
diff --git a/net/sched/sch_tbf.c b/net/sched/sch_tbf.c
index 17d2d00ddb..dd6b1a723b 100644
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -621,3 +621,4 @@ static void __exit tbf_module_exit(void)
 module_init(tbf_module_init)
 module_exit(tbf_module_exit)
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Token Bucket Filter qdisc");
diff --git a/net/sched/sch_teql.c b/net/sched/sch_teql.c
index 7721239c18..59304611dc 100644
--- a/net/sched/sch_teql.c
+++ b/net/sched/sch_teql.c
@@ -523,3 +523,4 @@ module_init(teql_init);
 module_exit(teql_exit);
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("True (or trivial) link equalizer qdisc");
-- 
cgit v1.2.3