rename generic-2.6/patches to generic-2.6/patches-2.6.21

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12636 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 0 insertions, 797 deletions

diff --git a/target/linux/generic-2.6/patches/200-sched_esfq.patch b/target/linux/generic-2.6/patches/200-sched_esfq.patch
deleted file mode 100644
index 38efcea6d..000000000
--- a/target/linux/generic-2.6/patches/200-sched_esfq.patch
+++ /dev/null
@@ -1,797 +0,0 @@
-Index: linux-2.6.21.7/include/linux/pkt_sched.h
-===================================================================
---- linux-2.6.21.7.orig/include/linux/pkt_sched.h
-+++ linux-2.6.21.7/include/linux/pkt_sched.h
-@@ -146,8 +146,40 @@ struct tc_sfq_qopt
-  *
-  *	The only reason for this is efficiency, it is possible
-  *	to change these parameters in compile time.
-+ *	
-+ *	If you need to play with these values use esfq instead.
-  */
- 
-+/* ESFQ section */
-+
-+enum
-+{
-+        /* traditional */
-+	TCA_SFQ_HASH_CLASSIC,
-+	TCA_SFQ_HASH_DST,
-+	TCA_SFQ_HASH_SRC,
-+	TCA_SFQ_HASH_FWMARK,
-+        /* direct */
-+	TCA_SFQ_HASH_DSTDIR,
-+	TCA_SFQ_HASH_SRCDIR,
-+	TCA_SFQ_HASH_FWMARKDIR,
-+	/* conntrack */
-+	TCA_SFQ_HASH_CTORIGDST,
-+	TCA_SFQ_HASH_CTORIGSRC,
-+	TCA_SFQ_HASH_CTREPLDST,
-+	TCA_SFQ_HASH_CTREPLSRC,
-+};
-+
-+struct tc_esfq_qopt
-+{
-+	unsigned	quantum;	/* Bytes per round allocated to flow */
-+	int		perturb_period;	/* Period of hash perturbation */
-+	__u32		limit;		/* Maximal packets in queue */
-+	unsigned	divisor;	/* Hash divisor  */
-+	unsigned	flows;		/* Maximal number of flows  */
-+	unsigned	hash_kind;	/* Hash function to use for flow identification */
-+};
-+
- /* RED section */
- 
- enum
-Index: linux-2.6.21.7/net/sched/Kconfig
-===================================================================
---- linux-2.6.21.7.orig/net/sched/Kconfig
-+++ linux-2.6.21.7/net/sched/Kconfig
-@@ -189,6 +189,26 @@ config NET_SCH_SFQ
- 	  To compile this code as a module, choose M here: the
- 	  module will be called sch_sfq.
- 
-+config NET_SCH_ESFQ
-+	tristate "Enhanced Stochastic Fairness Queueing (ESFQ)"
-+	---help---
-+	  Say Y here if you want to use the Enhanced Stochastic Fairness
-+	  Queueing (ESFQ) packet scheduling algorithm for some of your network
-+	  devices or as a leaf discipline for a classful qdisc such as HTB or
-+	  CBQ (see the top of <file:net/sched/sch_esfq.c> for details and
-+	  references to the SFQ algorithm).
-+
-+	  This is an enchanced SFQ version which allows you to control some
-+	  hardcoded values in the SFQ scheduler.
-+
-+	  ESFQ also adds control of the hash function used to identify packet
-+	  flows. The original SFQ discipline hashes by connection; ESFQ add
-+	  several other hashing methods, such as by src IP or by dst IP, which
-+	  can be more fair to users in some networking situations.
-+	  
-+	  To compile this code as a module, choose M here: the
-+	  module will be called sch_esfq.
-+
- config NET_SCH_TEQL
- 	tristate "True Link Equalizer (TEQL)"
- 	---help---
-Index: linux-2.6.21.7/net/sched/Makefile
-===================================================================
---- linux-2.6.21.7.orig/net/sched/Makefile
-+++ linux-2.6.21.7/net/sched/Makefile
-@@ -23,6 +23,7 @@ obj-$(CONFIG_NET_SCH_GRED)	+= sch_gred.o
- obj-$(CONFIG_NET_SCH_INGRESS)	+= sch_ingress.o 
- obj-$(CONFIG_NET_SCH_DSMARK)	+= sch_dsmark.o
- obj-$(CONFIG_NET_SCH_SFQ)	+= sch_sfq.o
-+obj-$(CONFIG_NET_SCH_ESFQ)	+= sch_esfq.o
- obj-$(CONFIG_NET_SCH_TBF)	+= sch_tbf.o
- obj-$(CONFIG_NET_SCH_TEQL)	+= sch_teql.o
- obj-$(CONFIG_NET_SCH_PRIO)	+= sch_prio.o
-Index: linux-2.6.21.7/net/sched/sch_esfq.c
-===================================================================
---- /dev/null
-+++ linux-2.6.21.7/net/sched/sch_esfq.c
-@@ -0,0 +1,704 @@
-+/*
-+ * net/sched/sch_esfq.c	Extended Stochastic Fairness Queueing discipline.
-+ *
-+ *		This program is free software; you can redistribute it and/or
-+ *		modify it under the terms of the GNU General Public License
-+ *		as published by the Free Software Foundation; either version
-+ *		2 of the License, or (at your option) any later version.
-+ *
-+ * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
-+ *
-+ * Changes:	Alexander Atanasov, <alex@ssi.bg>
-+ *		Added dynamic depth,limit,divisor,hash_kind options.
-+ *		Added dst and src hashes.
-+ *
-+ * 		Alexander Clouter, <alex@digriz.org.uk>
-+ *		Ported ESFQ to Linux 2.6.
-+ *
-+ * 		Corey Hickey, <bugfood-c@fatooh.org>
-+ *		Maintenance of the Linux 2.6 port.
-+ *		Added fwmark hash (thanks to Robert Kurjata).
-+ *		Added direct hashing for src, dst, and fwmark.
-+ *		Added usage of jhash.
-+ *		
-+ */
-+
-+#include <linux/module.h>
-+#include <asm/uaccess.h>
-+#include <asm/system.h>
-+#include <linux/bitops.h>
-+#include <linux/types.h>
-+#include <linux/kernel.h>
-+#include <linux/jiffies.h>
-+#include <linux/string.h>
-+#include <linux/mm.h>
-+#include <linux/socket.h>
-+#include <linux/sockios.h>
-+#include <linux/in.h>
-+#include <linux/errno.h>
-+#include <linux/interrupt.h>
-+#include <linux/if_ether.h>
-+#include <linux/inet.h>
-+#include <linux/netdevice.h>
-+#include <linux/etherdevice.h>
-+#include <linux/notifier.h>
-+#include <linux/init.h>
-+#include <net/ip.h>
-+#include <linux/ipv6.h>
-+#include <net/route.h>
-+#include <linux/skbuff.h>
-+#include <net/sock.h>
-+#include <net/pkt_sched.h>
-+#include <linux/jhash.h>
-+
-+#ifdef CONFIG_NF_CONNTRACK_ENABLED
-+#include <net/netfilter/nf_conntrack.h>
-+#endif
-+
-+/*	Stochastic Fairness Queuing algorithm.
-+	For more comments look at sch_sfq.c.
-+	The difference is that you can change limit, depth,
-+	hash table size and choose alternate hash types.
-+	
-+	classic:	same as in sch_sfq.c
-+	dst:		destination IP address
-+	src:		source IP address
-+	fwmark:         netfilter mark value
-+	dst_direct:
-+	src_direct:
-+	fwmark_direct:  direct hashing of the above sources
-+	ctorigdst:	original destination IP address
-+	ctorigsrc:	original source IP address
-+	ctrepldst:	reply destination IP address
-+	ctreplsrc:	reply source IP 
-+	
-+*/
-+
-+
-+/* This type should contain at least SFQ_DEPTH*2 values */
-+typedef unsigned int esfq_index;
-+
-+struct esfq_head
-+{
-+	esfq_index	next;
-+	esfq_index	prev;
-+};
-+
-+struct esfq_sched_data
-+{
-+/* Parameters */
-+	int		perturb_period;
-+	unsigned	quantum;	/* Allotment per round: MUST BE >= MTU */
-+	int		limit;
-+	unsigned	depth;
-+	unsigned	hash_divisor;
-+	unsigned	hash_kind;
-+/* Variables */
-+	struct timer_list perturb_timer;
-+	int		perturbation;
-+	esfq_index	tail;		/* Index of current slot in round */
-+	esfq_index	max_depth;	/* Maximal depth */
-+
-+	esfq_index	*ht;			/* Hash table */
-+	esfq_index	*next;			/* Active slots link */
-+	short		*allot;			/* Current allotment per slot */
-+	unsigned short	*hash;			/* Hash value indexed by slots */
-+	struct sk_buff_head	*qs;		/* Slot queue */
-+	struct esfq_head	*dep;		/* Linked list of slots, indexed by depth */
-+	unsigned	dyn_min;	/* For dynamic divisor adjustment; minimum value seen */
-+	unsigned	dyn_max;	/*                                 maximum value seen */
-+	unsigned	dyn_range;	/*	        		   saved range */
-+};
-+
-+/* This contains the info we will hash. */
-+struct esfq_packet_info
-+{
-+	u32	proto;		/* protocol or port */
-+	u32	src;		/* source from packet header */
-+	u32	dst;		/* destination from packet header */
-+	u32	ctorigsrc;	/* original source from conntrack */
-+	u32	ctorigdst;	/* original destination from conntrack */
-+	u32	ctreplsrc;	/* reply source from conntrack */
-+	u32	ctrepldst;	/* reply destination from conntrack */
-+	u32	mark;		/* netfilter mark (fwmark) */
-+};
-+
-+/* Hash input values directly into the "nearest" slot, taking into account the
-+ * range of input values seen. This is most useful when the hash table is at
-+ * least as large as the range of possible values.
-+ * Note: this functionality was added before the change to using jhash, and may
-+ * no longer be useful. */
-+static __inline__ unsigned esfq_hash_direct(struct esfq_sched_data *q, u32 h)
-+{
-+	/* adjust minimum and maximum */
-+	if (h < q->dyn_min || h > q->dyn_max) {
-+		q->dyn_min = h < q->dyn_min ? h : q->dyn_min;
-+		q->dyn_max = h > q->dyn_max ? h : q->dyn_max;
-+	
-+		/* find new range */
-+		if ((q->dyn_range = q->dyn_max - q->dyn_min) >= q->hash_divisor)
-+			printk(KERN_WARNING "ESFQ: (direct hash) Input range %u is larger than hash "
-+					"table. See ESFQ README for details.\n", q->dyn_range);
-+	}
-+	
-+	/* hash input values into slot numbers */
-+	if (q->dyn_min == q->dyn_max)
-+		return 0; /* only one value seen; avoid division by 0 */
-+	else
-+		return (h - q->dyn_min) * (q->hash_divisor - 1) / q->dyn_range;
-+}
-+
-+static __inline__ unsigned esfq_jhash_1word(struct esfq_sched_data *q,u32 a)
-+{
-+	return jhash_1word(a, q->perturbation) & (q->hash_divisor-1);
-+}
-+
-+static __inline__ unsigned esfq_jhash_2words(struct esfq_sched_data *q, u32 a, u32 b)
-+{
-+	return jhash_2words(a, b, q->perturbation) & (q->hash_divisor-1);
-+}
-+
-+static __inline__ unsigned esfq_jhash_3words(struct esfq_sched_data *q, u32 a, u32 b, u32 c)
-+{
-+	return jhash_3words(a, b, c, q->perturbation) & (q->hash_divisor-1);
-+}
-+
-+
-+static unsigned esfq_hash(struct esfq_sched_data *q, struct sk_buff *skb)
-+{
-+	struct esfq_packet_info info;
-+#ifdef CONFIG_NF_CONNTRACK_ENABLED
-+	enum ip_conntrack_info ctinfo;
-+	struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
-+#endif
-+	
-+	switch (skb->protocol) {
-+	case __constant_htons(ETH_P_IP):
-+	{
-+		struct iphdr *iph = skb->nh.iph;
-+		info.dst = iph->daddr;
-+		info.src = iph->saddr;
-+		if (!(iph->frag_off&htons(IP_MF|IP_OFFSET)) &&
-+		    (iph->protocol == IPPROTO_TCP ||
-+		     iph->protocol == IPPROTO_UDP ||
-+		     iph->protocol == IPPROTO_SCTP ||
-+		     iph->protocol == IPPROTO_DCCP ||
-+		     iph->protocol == IPPROTO_ESP))
-+			info.proto = *(((u32*)iph) + iph->ihl);
-+		else
-+			info.proto = iph->protocol;
-+		break;
-+	}
-+	case __constant_htons(ETH_P_IPV6):
-+	{
-+		struct ipv6hdr *iph = skb->nh.ipv6h;
-+		/* Hash ipv6 addresses into a u32. This isn't ideal,
-+		 * but the code is simple. */
-+		info.dst = jhash2(iph->daddr.s6_addr32, 4, q->perturbation);
-+		info.src = jhash2(iph->saddr.s6_addr32, 4, q->perturbation);
-+		if (iph->nexthdr == IPPROTO_TCP ||
-+		    iph->nexthdr == IPPROTO_UDP ||
-+		    iph->nexthdr == IPPROTO_SCTP ||
-+		    iph->nexthdr == IPPROTO_DCCP ||
-+		    iph->nexthdr == IPPROTO_ESP)
-+			info.proto = *(u32*)&iph[1];
-+		else
-+			info.proto = iph->nexthdr;
-+		break;
-+	}
-+	default:
-+		info.dst   = (u32)(unsigned long)skb->dst;
-+		info.src   = (u32)(unsigned long)skb->sk;
-+		info.proto = skb->protocol;
-+	}
-+
-+	info.mark = skb->mark;
-+
-+#ifdef CONFIG_NF_CONNTRACK_ENABLED
-+	/* defaults if there is no conntrack info */
-+	info.ctorigsrc = info.src;
-+	info.ctorigdst = info.dst;
-+	info.ctreplsrc = info.dst;
-+	info.ctrepldst = info.src;
-+	/* collect conntrack info */
-+	if (ct && ct != &nf_conntrack_untracked) {
-+		if (skb->protocol == __constant_htons(ETH_P_IP)) {
-+			info.ctorigsrc = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip;
-+			info.ctorigdst = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.ip;
-+			info.ctreplsrc = ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip;
-+			info.ctrepldst = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip;
-+		}
-+		else if (skb->protocol == __constant_htons(ETH_P_IPV6)) {
-+			/* Again, hash ipv6 addresses into a single u32. */
-+			info.ctorigsrc = jhash2(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip6, 4, q->perturbation);
-+			info.ctorigdst = jhash2(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.ip6, 4, q->perturbation);
-+			info.ctreplsrc = jhash2(ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip6, 4, q->perturbation);
-+			info.ctrepldst = jhash2(ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip6, 4, q->perturbation);
-+		}
-+
-+	}
-+#endif
-+
-+	switch(q->hash_kind)
-+	{
-+	case TCA_SFQ_HASH_CLASSIC:
-+		return esfq_jhash_3words(q, info.dst, info.src, info.proto);
-+	case TCA_SFQ_HASH_DST:
-+		return esfq_jhash_1word(q, info.dst);
-+	case TCA_SFQ_HASH_DSTDIR:
-+		return esfq_hash_direct(q, ntohl(info.dst));
-+	case TCA_SFQ_HASH_SRC:
-+		return esfq_jhash_1word(q, info.src);
-+	case TCA_SFQ_HASH_SRCDIR:
-+		return esfq_hash_direct(q, ntohl(info.src));
-+	case TCA_SFQ_HASH_FWMARK:
-+		return esfq_jhash_1word(q, info.mark);
-+	case TCA_SFQ_HASH_FWMARKDIR:
-+		return esfq_hash_direct(q, info.mark);
-+#ifdef CONFIG_NF_CONNTRACK_ENABLED
-+	case TCA_SFQ_HASH_CTORIGDST:
-+		return esfq_jhash_1word(q, info.ctorigdst);
-+	case TCA_SFQ_HASH_CTORIGSRC:
-+		return esfq_jhash_1word(q, info.ctorigsrc);
-+	case TCA_SFQ_HASH_CTREPLDST:
-+		return esfq_jhash_1word(q, info.ctrepldst);
-+	case TCA_SFQ_HASH_CTREPLSRC:
-+		return esfq_jhash_1word(q, info.ctreplsrc);
-+#endif
-+	default:
-+		if (net_ratelimit())
-+			printk(KERN_WARNING "ESFQ: Unknown hash method. Falling back to classic.\n");
-+	}
-+	return esfq_jhash_3words(q, info.dst, info.src, info.proto);
-+}
-+
-+static inline void esfq_link(struct esfq_sched_data *q, esfq_index x)
-+{
-+	esfq_index p, n;
-+	int d = q->qs[x].qlen + q->depth;
-+
-+	p = d;
-+	n = q->dep[d].next;
-+	q->dep[x].next = n;
-+	q->dep[x].prev = p;
-+	q->dep[p].next = q->dep[n].prev = x;
-+}
-+
-+static inline void esfq_dec(struct esfq_sched_data *q, esfq_index x)
-+{
-+	esfq_index p, n;
-+
-+	n = q->dep[x].next;
-+	p = q->dep[x].prev;
-+	q->dep[p].next = n;
-+	q->dep[n].prev = p;
-+
-+	if (n == p && q->max_depth == q->qs[x].qlen + 1)
-+		q->max_depth--;
-+
-+	esfq_link(q, x);
-+}
-+
-+static inline void esfq_inc(struct esfq_sched_data *q, esfq_index x)
-+{
-+	esfq_index p, n;
-+	int d;
-+
-+	n = q->dep[x].next;
-+	p = q->dep[x].prev;
-+	q->dep[p].next = n;
-+	q->dep[n].prev = p;
-+	d = q->qs[x].qlen;
-+	if (q->max_depth < d)
-+		q->max_depth = d;
-+
-+	esfq_link(q, x);
-+}
-+
-+static unsigned int esfq_drop(struct Qdisc *sch)
-+{
-+	struct esfq_sched_data *q = qdisc_priv(sch);
-+	esfq_index d = q->max_depth;
-+	struct sk_buff *skb;
-+	unsigned int len;
-+
-+	/* Queue is full! Find the longest slot and
-+	   drop a packet from it */
-+
-+	if (d > 1) {
-+		esfq_index x = q->dep[d+q->depth].next;
-+		skb = q->qs[x].prev;
-+		len = skb->len;
-+		__skb_unlink(skb, &q->qs[x]);
-+		kfree_skb(skb);
-+		esfq_dec(q, x);
-+		sch->q.qlen--;
-+		sch->qstats.drops++;
-+		sch->qstats.backlog -= len;
-+		return len;
-+	}
-+
-+	if (d == 1) {
-+		/* It is difficult to believe, but ALL THE SLOTS HAVE LENGTH 1. */
-+		d = q->next[q->tail];
-+		q->next[q->tail] = q->next[d];
-+		q->allot[q->next[d]] += q->quantum;
-+		skb = q->qs[d].prev;
-+		len = skb->len;
-+		__skb_unlink(skb, &q->qs[d]);
-+		kfree_skb(skb);
-+		esfq_dec(q, d);
-+		sch->q.qlen--;
-+		q->ht[q->hash[d]] = q->depth;
-+		sch->qstats.drops++;
-+		sch->qstats.backlog -= len;
-+		return len;
-+	}
-+
-+	return 0;
-+}
-+
-+static int
-+esfq_enqueue(struct sk_buff *skb, struct Qdisc* sch)
-+{
-+	struct esfq_sched_data *q = qdisc_priv(sch);
-+	unsigned hash = esfq_hash(q, skb);
-+	unsigned depth = q->depth;
-+	esfq_index x;
-+
-+	x = q->ht[hash];
-+	if (x == depth) {
-+		q->ht[hash] = x = q->dep[depth].next;
-+		q->hash[x] = hash;
-+	}
-+	sch->qstats.backlog += skb->len;
-+	__skb_queue_tail(&q->qs[x], skb);
-+	esfq_inc(q, x);
-+	if (q->qs[x].qlen == 1) {		/* The flow is new */
-+		if (q->tail == depth) {	/* It is the first flow */
-+			q->tail = x;
-+			q->next[x] = x;
-+			q->allot[x] = q->quantum;
-+		} else {
-+			q->next[x] = q->next[q->tail];
-+			q->next[q->tail] = x;
-+			q->tail = x;
-+		}
-+	}
-+	if (++sch->q.qlen < q->limit-1) {
-+		sch->bstats.bytes += skb->len;
-+		sch->bstats.packets++;
-+		return 0;
-+	}
-+
-+	esfq_drop(sch);
-+	return NET_XMIT_CN;
-+}
-+
-+static int
-+esfq_requeue(struct sk_buff *skb, struct Qdisc* sch)
-+{
-+	struct esfq_sched_data *q = qdisc_priv(sch);
-+	unsigned hash = esfq_hash(q, skb);
-+	unsigned depth = q->depth;
-+	esfq_index x;
-+
-+	x = q->ht[hash];
-+	if (x == depth) {
-+		q->ht[hash] = x = q->dep[depth].next;
-+		q->hash[x] = hash;
-+	}
-+	sch->qstats.backlog += skb->len;
-+	__skb_queue_head(&q->qs[x], skb);
-+	esfq_inc(q, x);
-+	if (q->qs[x].qlen == 1) {		/* The flow is new */
-+		if (q->tail == depth) {	/* It is the first flow */
-+			q->tail = x;
-+			q->next[x] = x;
-+			q->allot[x] = q->quantum;
-+		} else {
-+			q->next[x] = q->next[q->tail];
-+			q->next[q->tail] = x;
-+			q->tail = x;
-+		}
-+	}
-+	if (++sch->q.qlen < q->limit - 1) {
-+		sch->qstats.requeues++;
-+		return 0;
-+	}
-+
-+	sch->qstats.drops++;
-+	esfq_drop(sch);
-+	return NET_XMIT_CN;
-+}
-+
-+
-+
-+
-+static struct sk_buff *
-+esfq_dequeue(struct Qdisc* sch)
-+{
-+	struct esfq_sched_data *q = qdisc_priv(sch);
-+	struct sk_buff *skb;
-+	unsigned depth = q->depth;
-+	esfq_index a, old_a;
-+
-+	/* No active slots */
-+	if (q->tail == depth)
-+		return NULL;
-+	
-+	a = old_a = q->next[q->tail];
-+	
-+	/* Grab packet */
-+	skb = __skb_dequeue(&q->qs[a]);
-+	esfq_dec(q, a);
-+	sch->q.qlen--;
-+	sch->qstats.backlog -= skb->len;
-+	
-+	/* Is the slot empty? */
-+	if (q->qs[a].qlen == 0) {
-+		q->ht[q->hash[a]] = depth;
-+		a = q->next[a];
-+		if (a == old_a) {
-+			q->tail = depth;
-+			return skb;
-+		}
-+		q->next[q->tail] = a;
-+		q->allot[a] += q->quantum;
-+	} else if ((q->allot[a] -= skb->len) <= 0) {
-+		q->tail = a;
-+		a = q->next[a];
-+		q->allot[a] += q->quantum;
-+	}
-+	
-+	return skb;
-+}
-+
-+static void
-+esfq_reset(struct Qdisc* sch)
-+{
-+	struct sk_buff *skb;
-+
-+	while ((skb = esfq_dequeue(sch)) != NULL)
-+		kfree_skb(skb);
-+}
-+
-+static void esfq_perturbation(unsigned long arg)
-+{
-+	struct Qdisc *sch = (struct Qdisc*)arg;
-+	struct esfq_sched_data *q = qdisc_priv(sch);
-+
-+	q->perturbation = net_random()&0x1F;
-+
-+	if (q->perturb_period) {
-+		q->perturb_timer.expires = jiffies + q->perturb_period;
-+		add_timer(&q->perturb_timer);
-+	}
-+}
-+
-+static int esfq_change(struct Qdisc *sch, struct rtattr *opt)
-+{
-+	struct esfq_sched_data *q = qdisc_priv(sch);
-+	struct tc_esfq_qopt *ctl = RTA_DATA(opt);
-+	int old_perturb = q->perturb_period;
-+	
-+	if (opt->rta_len < RTA_LENGTH(sizeof(*ctl)))
-+		return -EINVAL;
-+	
-+	sch_tree_lock(sch);
-+	q->quantum = ctl->quantum ? : psched_mtu(sch->dev);
-+	q->perturb_period = ctl->perturb_period*HZ;
-+//	q->hash_divisor = ctl->divisor;
-+//	q->tail = q->limit = q->depth = ctl->flows;
-+	
-+	if (ctl->limit)
-+		q->limit = min_t(u32, ctl->limit, q->depth);
-+	
-+	if (ctl->hash_kind) {
-+		q->hash_kind = ctl->hash_kind;
-+		if (q->hash_kind != TCA_SFQ_HASH_CLASSIC)
-+			q->perturb_period = 0;
-+	}
-+	
-+	// is sch_tree_lock enough to do this ?
-+	while (sch->q.qlen >= q->limit-1)
-+		esfq_drop(sch);
-+	
-+	if (old_perturb)
-+		del_timer(&q->perturb_timer);
-+	if (q->perturb_period) {
-+		q->perturb_timer.expires = jiffies + q->perturb_period;
-+		add_timer(&q->perturb_timer);
-+	} else {
-+		q->perturbation = 0;
-+	}
-+	sch_tree_unlock(sch);
-+	return 0;
-+}
-+
-+static int esfq_init(struct Qdisc *sch, struct rtattr *opt)
-+{
-+	struct esfq_sched_data *q = qdisc_priv(sch);
-+	struct tc_esfq_qopt *ctl;
-+	esfq_index p = ~0U/2;
-+	int i;
-+	
-+	if (opt && opt->rta_len < RTA_LENGTH(sizeof(*ctl)))
-+		return -EINVAL;
-+
-+	init_timer(&q->perturb_timer);
-+	q->perturb_timer.data = (unsigned long)sch;
-+	q->perturb_timer.function = esfq_perturbation;
-+	q->perturbation = 0;
-+	q->hash_kind = TCA_SFQ_HASH_CLASSIC;
-+	q->max_depth = 0;
-+	q->dyn_min = ~0U; /* maximum value for this type */
-+	q->dyn_max = 0;  /* dyn_min/dyn_max will be set properly upon first packet */
-+	if (opt == NULL) {
-+		q->quantum = psched_mtu(sch->dev);
-+		q->perturb_period = 0;
-+		q->hash_divisor = 1024;
-+		q->tail = q->limit = q->depth = 128;
-+		
-+	} else {
-+		ctl = RTA_DATA(opt);
-+		q->quantum = ctl->quantum ? : psched_mtu(sch->dev);
-+		q->perturb_period = ctl->perturb_period*HZ;
-+		q->hash_divisor = ctl->divisor ? : 1024;
-+		q->tail = q->limit = q->depth = ctl->flows ? : 128;
-+		
-+		if ( q->depth > p - 1 )
-+			return -EINVAL;
-+		
-+		if (ctl->limit)
-+			q->limit = min_t(u32, ctl->limit, q->depth);
-+		
-+		if (ctl->hash_kind) {
-+			q->hash_kind = ctl->hash_kind;
-+		}
-+		
-+		if (q->perturb_period) {
-+			q->perturb_timer.expires = jiffies + q->perturb_period;
-+			add_timer(&q->perturb_timer);
-+		}
-+	}
-+	
-+	q->ht = kmalloc(q->hash_divisor*sizeof(esfq_index), GFP_KERNEL);
-+	if (!q->ht)
-+		goto err_case;
-+		
-+	q->dep = kmalloc((1+q->depth*2)*sizeof(struct esfq_head), GFP_KERNEL);
-+	if (!q->dep)
-+		goto err_case;
-+	q->next = kmalloc(q->depth*sizeof(esfq_index), GFP_KERNEL);
-+	if (!q->next)
-+		goto err_case;
-+	
-+	q->allot = kmalloc(q->depth*sizeof(short), GFP_KERNEL);
-+	if (!q->allot)
-+		goto err_case;
-+	q->hash = kmalloc(q->depth*sizeof(unsigned short), GFP_KERNEL);
-+	if (!q->hash)
-+		goto err_case;
-+	q->qs = kmalloc(q->depth*sizeof(struct sk_buff_head), GFP_KERNEL);
-+	if (!q->qs)
-+		goto err_case;
-+	
-+	for (i=0; i< q->hash_divisor; i++)
-+		q->ht[i] = q->depth;
-+	for (i=0; i<q->depth; i++) {
-+		skb_queue_head_init(&q->qs[i]);
-+		q->dep[i+q->depth].next = i+q->depth;
-+		q->dep[i+q->depth].prev = i+q->depth;
-+	}
-+	
-+	for (i=0; i<q->depth; i++)
-+		esfq_link(q, i);
-+	return 0;
-+err_case:
-+	del_timer(&q->perturb_timer);
-+	if (q->ht)
-+		kfree(q->ht);
-+	if (q->dep)
-+		kfree(q->dep);
-+	if (q->next)
-+		kfree(q->next);
-+	if (q->allot)
-+		kfree(q->allot);
-+	if (q->hash)
-+		kfree(q->hash);
-+	if (q->qs)
-+		kfree(q->qs);
-+	return -ENOBUFS;
-+}
-+
-+static void esfq_destroy(struct Qdisc *sch)
-+{
-+	struct esfq_sched_data *q = qdisc_priv(sch);
-+	del_timer(&q->perturb_timer);
-+	if(q->ht)
-+		kfree(q->ht);
-+	if(q->dep)
-+		kfree(q->dep);
-+	if(q->next)
-+		kfree(q->next);
-+	if(q->allot)
-+		kfree(q->allot);
-+	if(q->hash)
-+		kfree(q->hash);
-+	if(q->qs)
-+		kfree(q->qs);
-+}
-+
-+static int esfq_dump(struct Qdisc *sch, struct sk_buff *skb)
-+{
-+	struct esfq_sched_data *q = qdisc_priv(sch);
-+	unsigned char	 *b = skb->tail;
-+	struct tc_esfq_qopt opt;
-+
-+	opt.quantum = q->quantum;
-+	opt.perturb_period = q->perturb_period/HZ;
-+
-+	opt.limit = q->limit;
-+	opt.divisor = q->hash_divisor;
-+	opt.flows = q->depth;
-+	opt.hash_kind = q->hash_kind;
-+
-+	RTA_PUT(skb, TCA_OPTIONS, sizeof(opt), &opt);
-+
-+	return skb->len;
-+
-+rtattr_failure:
-+	skb_trim(skb, b - skb->data);
-+	return -1;
-+}
-+
-+static struct Qdisc_ops esfq_qdisc_ops =
-+{
-+	.next		=	NULL,
-+	.cl_ops		=	NULL,
-+	.id		=	"esfq",
-+	.priv_size	=	sizeof(struct esfq_sched_data),
-+	.enqueue	=	esfq_enqueue,
-+	.dequeue	=	esfq_dequeue,
-+	.requeue	=	esfq_requeue,
-+	.drop		=	esfq_drop,
-+	.init		=	esfq_init,
-+	.reset		=	esfq_reset,
-+	.destroy	=	esfq_destroy,
-+	.change		=	NULL, /* esfq_change - needs more work */
-+	.dump		=	esfq_dump,
-+	.owner		=	THIS_MODULE,
-+};
-+
-+static int __init esfq_module_init(void)
-+{
-+	return register_qdisc(&esfq_qdisc_ops);
-+}
-+static void __exit esfq_module_exit(void) 
-+{
-+	unregister_qdisc(&esfq_qdisc_ops);
-+}
-+module_init(esfq_module_init)
-+module_exit(esfq_module_exit)
-+MODULE_LICENSE("GPL");