Kernel: T5186: T3318: update Linux Kernel to v5.4.243

1 files changed, 786 insertions, 0 deletions

diff --git a/packages/linux-kernel/patches/kernel/0004-revert-net-sched-retire-tcindex-classifier.patch b/packages/linux-kernel/patches/kernel/0004-revert-net-sched-retire-tcindex-classifier.patch
new file mode 100644
index 00000000..bc57bee9
--- /dev/null
+++ b/packages/linux-kernel/patches/kernel/0004-revert-net-sched-retire-tcindex-classifier.patch
@@ -0,0 +1,786 @@
+From 4bdc6cb93ef35b1d1ff394e7d74ae9c0f366fbfd Mon Sep 17 00:00:00 2001
+From: Christian Breunig <christian@breunig.cc>
+Date: Thu, 18 May 2023 20:53:54 +0000
+Subject: [PATCH] Revert "net/sched: Retire tcindex classifier"
+
+This reverts commit 7a6fb69bbcb21e9ce13bdf18c008c268874f0480.
+---
+ net/sched/Kconfig       |  11 +
+ net/sched/Makefile      |   1 +
+ net/sched/cls_tcindex.c | 730 ++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 742 insertions(+)
+ create mode 100644 net/sched/cls_tcindex.c
+
+diff --git a/net/sched/Kconfig b/net/sched/Kconfig
+index 2e4604cdaf23..2985509147a2 100644
+--- a/net/sched/Kconfig
++++ b/net/sched/Kconfig
+@@ -469,6 +469,17 @@ config NET_CLS_BASIC
+ 	  To compile this code as a module, choose M here: the
+ 	  module will be called cls_basic.
+ 
++config NET_CLS_TCINDEX
++	tristate "Traffic-Control Index (TCINDEX)"
++	select NET_CLS
++	---help---
++	  Say Y here if you want to be able to classify packets based on
++	  traffic control indices. You will want this feature if you want
++	  to implement Differentiated Services together with DSMARK.
++
++	  To compile this code as a module, choose M here: the
++	  module will be called cls_tcindex.
++
+ config NET_CLS_ROUTE4
+ 	tristate "Routing decision (ROUTE)"
+ 	depends on INET
+diff --git a/net/sched/Makefile b/net/sched/Makefile
+index 9e1f904d0c18..415d1e1f237e 100644
+--- a/net/sched/Makefile
++++ b/net/sched/Makefile
+@@ -66,6 +66,7 @@ obj-$(CONFIG_NET_CLS_U32)	+= cls_u32.o
+ obj-$(CONFIG_NET_CLS_ROUTE4)	+= cls_route.o
+ obj-$(CONFIG_NET_CLS_FW)	+= cls_fw.o
+ obj-$(CONFIG_NET_CLS_RSVP)	+= cls_rsvp.o
++obj-$(CONFIG_NET_CLS_TCINDEX)	+= cls_tcindex.o
+ obj-$(CONFIG_NET_CLS_RSVP6)	+= cls_rsvp6.o
+ obj-$(CONFIG_NET_CLS_BASIC)	+= cls_basic.o
+ obj-$(CONFIG_NET_CLS_FLOW)	+= cls_flow.o
+diff --git a/net/sched/cls_tcindex.c b/net/sched/cls_tcindex.c
+new file mode 100644
+index 000000000000..768cf7cf65b4
+--- /dev/null
++++ b/net/sched/cls_tcindex.c
+@@ -0,0 +1,730 @@
++// SPDX-License-Identifier: GPL-2.0-only
++/*
++ * net/sched/cls_tcindex.c	Packet classifier for skb->tc_index
++ *
++ * Written 1998,1999 by Werner Almesberger, EPFL ICA
++ */
++
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <linux/skbuff.h>
++#include <linux/errno.h>
++#include <linux/slab.h>
++#include <linux/refcount.h>
++#include <net/act_api.h>
++#include <net/netlink.h>
++#include <net/pkt_cls.h>
++#include <net/sch_generic.h>
++
++/*
++ * Passing parameters to the root seems to be done more awkwardly than really
++ * necessary. At least, u32 doesn't seem to use such dirty hacks. To be
++ * verified. FIXME.
++ */
++
++#define PERFECT_HASH_THRESHOLD	64	/* use perfect hash if not bigger */
++#define DEFAULT_HASH_SIZE	64	/* optimized for diffserv */
++
++
++struct tcindex_data;
++
++struct tcindex_filter_result {
++	struct tcf_exts		exts;
++	struct tcf_result	res;
++	struct tcindex_data	*p;
++	struct rcu_work		rwork;
++};
++
++struct tcindex_filter {
++	u16 key;
++	struct tcindex_filter_result result;
++	struct tcindex_filter __rcu *next;
++	struct rcu_work rwork;
++};
++
++
++struct tcindex_data {
++	struct tcindex_filter_result *perfect; /* perfect hash; NULL if none */
++	struct tcindex_filter __rcu **h; /* imperfect hash; */
++	struct tcf_proto *tp;
++	u16 mask;		/* AND key with mask */
++	u32 shift;		/* shift ANDed key to the right */
++	u32 hash;		/* hash table size; 0 if undefined */
++	u32 alloc_hash;		/* allocated size */
++	u32 fall_through;	/* 0: only classify if explicit match */
++	refcount_t refcnt;	/* a temporary refcnt for perfect hash */
++	struct rcu_work rwork;
++};
++
++static inline int tcindex_filter_is_set(struct tcindex_filter_result *r)
++{
++	return tcf_exts_has_actions(&r->exts) || r->res.classid;
++}
++
++static void tcindex_data_get(struct tcindex_data *p)
++{
++	refcount_inc(&p->refcnt);
++}
++
++static void tcindex_data_put(struct tcindex_data *p)
++{
++	if (refcount_dec_and_test(&p->refcnt)) {
++		kfree(p->perfect);
++		kfree(p->h);
++		kfree(p);
++	}
++}
++
++static struct tcindex_filter_result *tcindex_lookup(struct tcindex_data *p,
++						    u16 key)
++{
++	if (p->perfect) {
++		struct tcindex_filter_result *f = p->perfect + key;
++
++		return tcindex_filter_is_set(f) ? f : NULL;
++	} else if (p->h) {
++		struct tcindex_filter __rcu **fp;
++		struct tcindex_filter *f;
++
++		fp = &p->h[key % p->hash];
++		for (f = rcu_dereference_bh_rtnl(*fp);
++		     f;
++		     fp = &f->next, f = rcu_dereference_bh_rtnl(*fp))
++			if (f->key == key)
++				return &f->result;
++	}
++
++	return NULL;
++}
++
++
++static int tcindex_classify(struct sk_buff *skb, const struct tcf_proto *tp,
++			    struct tcf_result *res)
++{
++	struct tcindex_data *p = rcu_dereference_bh(tp->root);
++	struct tcindex_filter_result *f;
++	int key = (skb->tc_index & p->mask) >> p->shift;
++
++	pr_debug("tcindex_classify(skb %p,tp %p,res %p),p %p\n",
++		 skb, tp, res, p);
++
++	f = tcindex_lookup(p, key);
++	if (!f) {
++		struct Qdisc *q = tcf_block_q(tp->chain->block);
++
++		if (!p->fall_through)
++			return -1;
++		res->classid = TC_H_MAKE(TC_H_MAJ(q->handle), key);
++		res->class = 0;
++		pr_debug("alg 0x%x\n", res->classid);
++		return 0;
++	}
++	*res = f->res;
++	pr_debug("map 0x%x\n", res->classid);
++
++	return tcf_exts_exec(skb, &f->exts, res);
++}
++
++
++static void *tcindex_get(struct tcf_proto *tp, u32 handle)
++{
++	struct tcindex_data *p = rtnl_dereference(tp->root);
++	struct tcindex_filter_result *r;
++
++	pr_debug("tcindex_get(tp %p,handle 0x%08x)\n", tp, handle);
++	if (p->perfect && handle >= p->alloc_hash)
++		return NULL;
++	r = tcindex_lookup(p, handle);
++	return r && tcindex_filter_is_set(r) ? r : NULL;
++}
++
++static int tcindex_init(struct tcf_proto *tp)
++{
++	struct tcindex_data *p;
++
++	pr_debug("tcindex_init(tp %p)\n", tp);
++	p = kzalloc(sizeof(struct tcindex_data), GFP_KERNEL);
++	if (!p)
++		return -ENOMEM;
++
++	p->mask = 0xffff;
++	p->hash = DEFAULT_HASH_SIZE;
++	p->fall_through = 1;
++	refcount_set(&p->refcnt, 1); /* Paired with tcindex_destroy_work() */
++
++	rcu_assign_pointer(tp->root, p);
++	return 0;
++}
++
++static void __tcindex_destroy_rexts(struct tcindex_filter_result *r)
++{
++	tcf_exts_destroy(&r->exts);
++	tcf_exts_put_net(&r->exts);
++	tcindex_data_put(r->p);
++}
++
++static void tcindex_destroy_rexts_work(struct work_struct *work)
++{
++	struct tcindex_filter_result *r;
++
++	r = container_of(to_rcu_work(work),
++			 struct tcindex_filter_result,
++			 rwork);
++	rtnl_lock();
++	__tcindex_destroy_rexts(r);
++	rtnl_unlock();
++}
++
++static void __tcindex_destroy_fexts(struct tcindex_filter *f)
++{
++	tcf_exts_destroy(&f->result.exts);
++	tcf_exts_put_net(&f->result.exts);
++	kfree(f);
++}
++
++static void tcindex_destroy_fexts_work(struct work_struct *work)
++{
++	struct tcindex_filter *f = container_of(to_rcu_work(work),
++						struct tcindex_filter,
++						rwork);
++
++	rtnl_lock();
++	__tcindex_destroy_fexts(f);
++	rtnl_unlock();
++}
++
++static int tcindex_delete(struct tcf_proto *tp, void *arg, bool *last,
++			  bool rtnl_held, struct netlink_ext_ack *extack)
++{
++	struct tcindex_data *p = rtnl_dereference(tp->root);
++	struct tcindex_filter_result *r = arg;
++	struct tcindex_filter __rcu **walk;
++	struct tcindex_filter *f = NULL;
++
++	pr_debug("tcindex_delete(tp %p,arg %p),p %p\n", tp, arg, p);
++	if (p->perfect) {
++		if (!r->res.class)
++			return -ENOENT;
++	} else {
++		int i;
++
++		for (i = 0; i < p->hash; i++) {
++			walk = p->h + i;
++			for (f = rtnl_dereference(*walk); f;
++			     walk = &f->next, f = rtnl_dereference(*walk)) {
++				if (&f->result == r)
++					goto found;
++			}
++		}
++		return -ENOENT;
++
++found:
++		rcu_assign_pointer(*walk, rtnl_dereference(f->next));
++	}
++	tcf_unbind_filter(tp, &r->res);
++	/* all classifiers are required to call tcf_exts_destroy() after rcu
++	 * grace period, since converted-to-rcu actions are relying on that
++	 * in cleanup() callback
++	 */
++	if (f) {
++		if (tcf_exts_get_net(&f->result.exts))
++			tcf_queue_work(&f->rwork, tcindex_destroy_fexts_work);
++		else
++			__tcindex_destroy_fexts(f);
++	} else {
++		tcindex_data_get(p);
++
++		if (tcf_exts_get_net(&r->exts))
++			tcf_queue_work(&r->rwork, tcindex_destroy_rexts_work);
++		else
++			__tcindex_destroy_rexts(r);
++	}
++
++	*last = false;
++	return 0;
++}
++
++static void tcindex_destroy_work(struct work_struct *work)
++{
++	struct tcindex_data *p = container_of(to_rcu_work(work),
++					      struct tcindex_data,
++					      rwork);
++
++	tcindex_data_put(p);
++}
++
++static inline int
++valid_perfect_hash(struct tcindex_data *p)
++{
++	return  p->hash > (p->mask >> p->shift);
++}
++
++static const struct nla_policy tcindex_policy[TCA_TCINDEX_MAX + 1] = {
++	[TCA_TCINDEX_HASH]		= { .type = NLA_U32 },
++	[TCA_TCINDEX_MASK]		= { .type = NLA_U16 },
++	[TCA_TCINDEX_SHIFT]		= { .type = NLA_U32 },
++	[TCA_TCINDEX_FALL_THROUGH]	= { .type = NLA_U32 },
++	[TCA_TCINDEX_CLASSID]		= { .type = NLA_U32 },
++};
++
++static int tcindex_filter_result_init(struct tcindex_filter_result *r,
++				      struct tcindex_data *p,
++				      struct net *net)
++{
++	memset(r, 0, sizeof(*r));
++	r->p = p;
++	return tcf_exts_init(&r->exts, net, TCA_TCINDEX_ACT,
++			     TCA_TCINDEX_POLICE);
++}
++
++static void tcindex_free_perfect_hash(struct tcindex_data *cp);
++
++static void tcindex_partial_destroy_work(struct work_struct *work)
++{
++	struct tcindex_data *p = container_of(to_rcu_work(work),
++					      struct tcindex_data,
++					      rwork);
++
++	rtnl_lock();
++	if (p->perfect)
++		tcindex_free_perfect_hash(p);
++	kfree(p);
++	rtnl_unlock();
++}
++
++static void tcindex_free_perfect_hash(struct tcindex_data *cp)
++{
++	int i;
++
++	for (i = 0; i < cp->hash; i++)
++		tcf_exts_destroy(&cp->perfect[i].exts);
++	kfree(cp->perfect);
++}
++
++static int tcindex_alloc_perfect_hash(struct net *net, struct tcindex_data *cp)
++{
++	int i, err = 0;
++
++	cp->perfect = kcalloc(cp->hash, sizeof(struct tcindex_filter_result),
++			      GFP_KERNEL | __GFP_NOWARN);
++	if (!cp->perfect)
++		return -ENOMEM;
++
++	for (i = 0; i < cp->hash; i++) {
++		err = tcf_exts_init(&cp->perfect[i].exts, net,
++				    TCA_TCINDEX_ACT, TCA_TCINDEX_POLICE);
++		if (err < 0)
++			goto errout;
++		cp->perfect[i].p = cp;
++	}
++
++	return 0;
++
++errout:
++	tcindex_free_perfect_hash(cp);
++	return err;
++}
++
++static int
++tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
++		  u32 handle, struct tcindex_data *p,
++		  struct tcindex_filter_result *r, struct nlattr **tb,
++		  struct nlattr *est, bool ovr, struct netlink_ext_ack *extack)
++{
++	struct tcindex_filter_result new_filter_result;
++	struct tcindex_data *cp = NULL, *oldp;
++	struct tcindex_filter *f = NULL; /* make gcc behave */
++	struct tcf_result cr = {};
++	int err, balloc = 0;
++	struct tcf_exts e;
++
++	err = tcf_exts_init(&e, net, TCA_TCINDEX_ACT, TCA_TCINDEX_POLICE);
++	if (err < 0)
++		return err;
++	err = tcf_exts_validate(net, tp, tb, est, &e, ovr, true, extack);
++	if (err < 0)
++		goto errout;
++
++	err = -ENOMEM;
++	/* tcindex_data attributes must look atomic to classifier/lookup so
++	 * allocate new tcindex data and RCU assign it onto root. Keeping
++	 * perfect hash and hash pointers from old data.
++	 */
++	cp = kzalloc(sizeof(*cp), GFP_KERNEL);
++	if (!cp)
++		goto errout;
++
++	cp->mask = p->mask;
++	cp->shift = p->shift;
++	cp->hash = p->hash;
++	cp->alloc_hash = p->alloc_hash;
++	cp->fall_through = p->fall_through;
++	cp->tp = tp;
++	refcount_set(&cp->refcnt, 1); /* Paired with tcindex_destroy_work() */
++
++	if (tb[TCA_TCINDEX_HASH])
++		cp->hash = nla_get_u32(tb[TCA_TCINDEX_HASH]);
++
++	if (tb[TCA_TCINDEX_MASK])
++		cp->mask = nla_get_u16(tb[TCA_TCINDEX_MASK]);
++
++	if (tb[TCA_TCINDEX_SHIFT]) {
++		cp->shift = nla_get_u32(tb[TCA_TCINDEX_SHIFT]);
++		if (cp->shift > 16) {
++			err = -EINVAL;
++			goto errout;
++		}
++	}
++	if (!cp->hash) {
++		/* Hash not specified, use perfect hash if the upper limit
++		 * of the hashing index is below the threshold.
++		 */
++		if ((cp->mask >> cp->shift) < PERFECT_HASH_THRESHOLD)
++			cp->hash = (cp->mask >> cp->shift) + 1;
++		else
++			cp->hash = DEFAULT_HASH_SIZE;
++	}
++
++	if (p->perfect) {
++		int i;
++
++		if (tcindex_alloc_perfect_hash(net, cp) < 0)
++			goto errout;
++		cp->alloc_hash = cp->hash;
++		for (i = 0; i < min(cp->hash, p->hash); i++)
++			cp->perfect[i].res = p->perfect[i].res;
++		balloc = 1;
++	}
++	cp->h = p->h;
++
++	err = tcindex_filter_result_init(&new_filter_result, cp, net);
++	if (err < 0)
++		goto errout_alloc;
++	if (r)
++		cr = r->res;
++
++	err = -EBUSY;
++
++	/* Hash already allocated, make sure that we still meet the
++	 * requirements for the allocated hash.
++	 */
++	if (cp->perfect) {
++		if (!valid_perfect_hash(cp) ||
++		    cp->hash > cp->alloc_hash)
++			goto errout_alloc;
++	} else if (cp->h && cp->hash != cp->alloc_hash) {
++		goto errout_alloc;
++	}
++
++	err = -EINVAL;
++	if (tb[TCA_TCINDEX_FALL_THROUGH])
++		cp->fall_through = nla_get_u32(tb[TCA_TCINDEX_FALL_THROUGH]);
++
++	if (!cp->perfect && !cp->h)
++		cp->alloc_hash = cp->hash;
++
++	/* Note: this could be as restrictive as if (handle & ~(mask >> shift))
++	 * but then, we'd fail handles that may become valid after some future
++	 * mask change. While this is extremely unlikely to ever matter,
++	 * the check below is safer (and also more backwards-compatible).
++	 */
++	if (cp->perfect || valid_perfect_hash(cp))
++		if (handle >= cp->alloc_hash)
++			goto errout_alloc;
++
++
++	err = -ENOMEM;
++	if (!cp->perfect && !cp->h) {
++		if (valid_perfect_hash(cp)) {
++			if (tcindex_alloc_perfect_hash(net, cp) < 0)
++				goto errout_alloc;
++			balloc = 1;
++		} else {
++			struct tcindex_filter __rcu **hash;
++
++			hash = kcalloc(cp->hash,
++				       sizeof(struct tcindex_filter *),
++				       GFP_KERNEL);
++
++			if (!hash)
++				goto errout_alloc;
++
++			cp->h = hash;
++			balloc = 2;
++		}
++	}
++
++	if (cp->perfect)
++		r = cp->perfect + handle;
++	else
++		r = tcindex_lookup(cp, handle) ? : &new_filter_result;
++
++	if (r == &new_filter_result) {
++		f = kzalloc(sizeof(*f), GFP_KERNEL);
++		if (!f)
++			goto errout_alloc;
++		f->key = handle;
++		f->next = NULL;
++		err = tcindex_filter_result_init(&f->result, cp, net);
++		if (err < 0) {
++			kfree(f);
++			goto errout_alloc;
++		}
++	}
++
++	if (tb[TCA_TCINDEX_CLASSID]) {
++		cr.classid = nla_get_u32(tb[TCA_TCINDEX_CLASSID]);
++		tcf_bind_filter(tp, &cr, base);
++	}
++
++	oldp = p;
++	r->res = cr;
++	tcf_exts_change(&r->exts, &e);
++
++	rcu_assign_pointer(tp->root, cp);
++
++	if (r == &new_filter_result) {
++		struct tcindex_filter *nfp;
++		struct tcindex_filter __rcu **fp;
++
++		f->result.res = r->res;
++		tcf_exts_change(&f->result.exts, &r->exts);
++
++		fp = cp->h + (handle % cp->hash);
++		for (nfp = rtnl_dereference(*fp);
++		     nfp;
++		     fp = &nfp->next, nfp = rtnl_dereference(*fp))
++				; /* nothing */
++
++		rcu_assign_pointer(*fp, f);
++	} else {
++		tcf_exts_destroy(&new_filter_result.exts);
++	}
++
++	if (oldp)
++		tcf_queue_work(&oldp->rwork, tcindex_partial_destroy_work);
++	return 0;
++
++errout_alloc:
++	if (balloc == 1)
++		tcindex_free_perfect_hash(cp);
++	else if (balloc == 2)
++		kfree(cp->h);
++	tcf_exts_destroy(&new_filter_result.exts);
++errout:
++	kfree(cp);
++	tcf_exts_destroy(&e);
++	return err;
++}
++
++static int
++tcindex_change(struct net *net, struct sk_buff *in_skb,
++	       struct tcf_proto *tp, unsigned long base, u32 handle,
++	       struct nlattr **tca, void **arg, bool ovr,
++	       bool rtnl_held, struct netlink_ext_ack *extack)
++{
++	struct nlattr *opt = tca[TCA_OPTIONS];
++	struct nlattr *tb[TCA_TCINDEX_MAX + 1];
++	struct tcindex_data *p = rtnl_dereference(tp->root);
++	struct tcindex_filter_result *r = *arg;
++	int err;
++
++	pr_debug("tcindex_change(tp %p,handle 0x%08x,tca %p,arg %p),opt %p,"
++	    "p %p,r %p,*arg %p\n",
++	    tp, handle, tca, arg, opt, p, r, arg ? *arg : NULL);
++
++	if (!opt)
++		return 0;
++
++	err = nla_parse_nested_deprecated(tb, TCA_TCINDEX_MAX, opt,
++					  tcindex_policy, NULL);
++	if (err < 0)
++		return err;
++
++	return tcindex_set_parms(net, tp, base, handle, p, r, tb,
++				 tca[TCA_RATE], ovr, extack);
++}
++
++static void tcindex_walk(struct tcf_proto *tp, struct tcf_walker *walker,
++			 bool rtnl_held)
++{
++	struct tcindex_data *p = rtnl_dereference(tp->root);
++	struct tcindex_filter *f, *next;
++	int i;
++
++	pr_debug("tcindex_walk(tp %p,walker %p),p %p\n", tp, walker, p);
++	if (p->perfect) {
++		for (i = 0; i < p->hash; i++) {
++			if (!p->perfect[i].res.class)
++				continue;
++			if (walker->count >= walker->skip) {
++				if (walker->fn(tp, p->perfect + i, walker) < 0) {
++					walker->stop = 1;
++					return;
++				}
++			}
++			walker->count++;
++		}
++	}
++	if (!p->h)
++		return;
++	for (i = 0; i < p->hash; i++) {
++		for (f = rtnl_dereference(p->h[i]); f; f = next) {
++			next = rtnl_dereference(f->next);
++			if (walker->count >= walker->skip) {
++				if (walker->fn(tp, &f->result, walker) < 0) {
++					walker->stop = 1;
++					return;
++				}
++			}
++			walker->count++;
++		}
++	}
++}
++
++static void tcindex_destroy(struct tcf_proto *tp, bool rtnl_held,
++			    struct netlink_ext_ack *extack)
++{
++	struct tcindex_data *p = rtnl_dereference(tp->root);
++	int i;
++
++	pr_debug("tcindex_destroy(tp %p),p %p\n", tp, p);
++
++	if (p->perfect) {
++		for (i = 0; i < p->hash; i++) {
++			struct tcindex_filter_result *r = p->perfect + i;
++
++			/* tcf_queue_work() does not guarantee the ordering we
++			 * want, so we have to take this refcnt temporarily to
++			 * ensure 'p' is freed after all tcindex_filter_result
++			 * here. Imperfect hash does not need this, because it
++			 * uses linked lists rather than an array.
++			 */
++			tcindex_data_get(p);
++
++			tcf_unbind_filter(tp, &r->res);
++			if (tcf_exts_get_net(&r->exts))
++				tcf_queue_work(&r->rwork,
++					       tcindex_destroy_rexts_work);
++			else
++				__tcindex_destroy_rexts(r);
++		}
++	}
++
++	for (i = 0; p->h && i < p->hash; i++) {
++		struct tcindex_filter *f, *next;
++		bool last;
++
++		for (f = rtnl_dereference(p->h[i]); f; f = next) {
++			next = rtnl_dereference(f->next);
++			tcindex_delete(tp, &f->result, &last, rtnl_held, NULL);
++		}
++	}
++
++	tcf_queue_work(&p->rwork, tcindex_destroy_work);
++}
++
++
++static int tcindex_dump(struct net *net, struct tcf_proto *tp, void *fh,
++			struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
++{
++	struct tcindex_data *p = rtnl_dereference(tp->root);
++	struct tcindex_filter_result *r = fh;
++	struct nlattr *nest;
++
++	pr_debug("tcindex_dump(tp %p,fh %p,skb %p,t %p),p %p,r %p\n",
++		 tp, fh, skb, t, p, r);
++	pr_debug("p->perfect %p p->h %p\n", p->perfect, p->h);
++
++	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
++	if (nest == NULL)
++		goto nla_put_failure;
++
++	if (!fh) {
++		t->tcm_handle = ~0; /* whatever ... */
++		if (nla_put_u32(skb, TCA_TCINDEX_HASH, p->hash) ||
++		    nla_put_u16(skb, TCA_TCINDEX_MASK, p->mask) ||
++		    nla_put_u32(skb, TCA_TCINDEX_SHIFT, p->shift) ||
++		    nla_put_u32(skb, TCA_TCINDEX_FALL_THROUGH, p->fall_through))
++			goto nla_put_failure;
++		nla_nest_end(skb, nest);
++	} else {
++		if (p->perfect) {
++			t->tcm_handle = r - p->perfect;
++		} else {
++			struct tcindex_filter *f;
++			struct tcindex_filter __rcu **fp;
++			int i;
++
++			t->tcm_handle = 0;
++			for (i = 0; !t->tcm_handle && i < p->hash; i++) {
++				fp = &p->h[i];
++				for (f = rtnl_dereference(*fp);
++				     !t->tcm_handle && f;
++				     fp = &f->next, f = rtnl_dereference(*fp)) {
++					if (&f->result == r)
++						t->tcm_handle = f->key;
++				}
++			}
++		}
++		pr_debug("handle = %d\n", t->tcm_handle);
++		if (r->res.class &&
++		    nla_put_u32(skb, TCA_TCINDEX_CLASSID, r->res.classid))
++			goto nla_put_failure;
++
++		if (tcf_exts_dump(skb, &r->exts) < 0)
++			goto nla_put_failure;
++		nla_nest_end(skb, nest);
++
++		if (tcf_exts_dump_stats(skb, &r->exts) < 0)
++			goto nla_put_failure;
++	}
++
++	return skb->len;
++
++nla_put_failure:
++	nla_nest_cancel(skb, nest);
++	return -1;
++}
++
++static void tcindex_bind_class(void *fh, u32 classid, unsigned long cl,
++			       void *q, unsigned long base)
++{
++	struct tcindex_filter_result *r = fh;
++
++	if (r && r->res.classid == classid) {
++		if (cl)
++			__tcf_bind_filter(q, &r->res, base);
++		else
++			__tcf_unbind_filter(q, &r->res);
++	}
++}
++
++static struct tcf_proto_ops cls_tcindex_ops __read_mostly = {
++	.kind		=	"tcindex",
++	.classify	=	tcindex_classify,
++	.init		=	tcindex_init,
++	.destroy	=	tcindex_destroy,
++	.get		=	tcindex_get,
++	.change		=	tcindex_change,
++	.delete		=	tcindex_delete,
++	.walk		=	tcindex_walk,
++	.dump		=	tcindex_dump,
++	.bind_class	=	tcindex_bind_class,
++	.owner		=	THIS_MODULE,
++};
++
++static int __init init_tcindex(void)
++{
++	return register_tcf_proto_ops(&cls_tcindex_ops);
++}
++
++static void __exit exit_tcindex(void)
++{
++	unregister_tcf_proto_ops(&cls_tcindex_ops);
++}
++
++module_init(init_tcindex)
++module_exit(exit_tcindex)
++MODULE_LICENSE("GPL");
+-- 
+2.30.2
+