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updated iproute2 to 2.6.23 + latest debian patches + latest esfq. deleted patches have been merged upstream. note, this also brings in the necessary esfq changes in the kernel

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SVN-Revision: 10147
This commit is contained in:
Tim Yardley
2008-01-08 22:28:35 +00:00
parent 244e25e2d7
commit 063e150eb9
6 changed files with 3267 additions and 1772 deletions
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532
target/linux/generic-2.6/patches-2.6.23/200-sched_esfq.patch
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@@ -1,13 +1,12 @@
Index: linux-2.6.23-rc6/include/linux/pkt_sched.h
===================================================================
--- linux-2.6.23-rc6.orig/include/linux/pkt_sched.h 2007-09-21 16:23:53.000000000 +0800
+++ linux-2.6.23-rc6/include/linux/pkt_sched.h 2007-09-21 16:24:04.000000000 +0800
@@ -155,8 +155,40 @@
diff -Naur linux-2.6.21.5.orig/include/linux/pkt_sched.h linux-2.6.21.5/include/linux/pkt_sched.h
--- linux-2.6.21.5.orig/include/linux/pkt_sched.h 2007-06-11 11:37:06.000000000 -0700
+++ linux-2.6.21.5/include/linux/pkt_sched.h 2007-06-22 22:53:46.000000000 -0700
@@ -146,8 +146,37 @@
*
* 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.
+ *
+ * If you need to play with these values, use esfq instead.
*/
+/* ESFQ section */
@@ -19,15 +18,12 @@ Index: linux-2.6.23-rc6/include/linux/pkt_sched.h
+ 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,
+ TCA_SFQ_HASH_CTNATCHG,
+};
+
+struct tc_esfq_qopt
@@ -43,11 +39,10 @@ Index: linux-2.6.23-rc6/include/linux/pkt_sched.h
/* RED section */
enum
Index: linux-2.6.23-rc6/net/sched/Kconfig
===================================================================
--- linux-2.6.23-rc6.orig/net/sched/Kconfig 2007-09-21 16:23:53.000000000 +0800
+++ linux-2.6.23-rc6/net/sched/Kconfig 2007-09-21 16:24:04.000000000 +0800
@@ -144,6 +144,26 @@
diff -Naur linux-2.6.21.5.orig/net/sched/Kconfig linux-2.6.21.5/net/sched/Kconfig
--- linux-2.6.21.5.orig/net/sched/Kconfig 2007-06-11 11:37:06.000000000 -0700
+++ linux-2.6.21.5/net/sched/Kconfig 2007-06-23 14:11:02.000000000 -0700
@@ -189,6 +189,37 @@
To compile this code as a module, choose M here: the
module will be called sch_sfq.
@@ -67,18 +62,28 @@ Index: linux-2.6.23-rc6/net/sched/Kconfig
+ 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_ESFQ_NFCT
+ bool "Connection Tracking Hash Types"
+ depends on NET_SCH_ESFQ && NF_CONNTRACK
+ ---help---
+ Say Y here to enable support for hashing based on netfilter connection
+ tracking information. This is useful for a router that is also using
+ NAT to connect privately-addressed hosts to the Internet. If you want
+ to provide fair distribution of upstream bandwidth, ESFQ must use
+ connection tracking information, since all outgoing packets will share
+ the same source address.
+
config NET_SCH_TEQL
tristate "True Link Equalizer (TEQL)"
---help---
Index: linux-2.6.23-rc6/net/sched/Makefile
===================================================================
--- linux-2.6.23-rc6.orig/net/sched/Makefile 2007-09-21 16:23:53.000000000 +0800
+++ linux-2.6.23-rc6/net/sched/Makefile 2007-09-21 16:24:04.000000000 +0800
@@ -22,6 +22,7 @@
diff -Naur linux-2.6.21.5.orig/net/sched/Makefile linux-2.6.21.5/net/sched/Makefile
--- linux-2.6.21.5.orig/net/sched/Makefile 2007-06-11 11:37:06.000000000 -0700
+++ linux-2.6.21.5/net/sched/Makefile 2007-06-22 22:53:46.000000000 -0700
@@ -23,6 +23,7 @@
obj-$(CONFIG_NET_SCH_INGRESS) += sch_ingress.o
obj-$(CONFIG_NET_SCH_DSMARK) += sch_dsmark.o
obj-$(CONFIG_NET_SCH_SFQ) += sch_sfq.o
@@ -86,11 +91,10 @@ Index: linux-2.6.23-rc6/net/sched/Makefile
obj-$(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-2.6.23-rc6/net/sched/sch_esfq.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.23-rc6/net/sched/sch_esfq.c 2007-09-21 16:24:04.000000000 +0800
@@ -0,0 +1,704 @@
diff -Naur linux-2.6.21.5.orig/net/sched/sch_esfq.c linux-2.6.21.5/net/sched/sch_esfq.c
--- linux-2.6.21.5.orig/net/sched/sch_esfq.c 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.21.5/net/sched/sch_esfq.c 2007-06-23 19:18:00.000000000 -0700
@@ -0,0 +1,702 @@
+/*
+ * net/sched/sch_esfq.c Extended Stochastic Fairness Queueing discipline.
+ *
@@ -111,9 +115,9 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ * 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.
+ *
+ * Added conntrack support.
+ * Added ctnatchg hash (thanks to Ben Pfountz).
+ */
+
+#include <linux/module.h>
@@ -143,30 +147,26 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+#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
+ fwmark: netfilter mark value
+ ctorigdst: original destination IP address
+ ctorigsrc: original source IP address
+ ctrepldst: reply destination IP address
+ ctreplsrc: reply source IP
+
+ ctreplsrc: reply source IP
+
+*/
+
+#define ESFQ_HEAD 0
+#define ESFQ_TAIL 1
+
+/* This type should contain at least SFQ_DEPTH*2 values */
+typedef unsigned int esfq_index;
@@ -198,9 +198,6 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ 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. */
@@ -216,31 +213,6 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ 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);
@@ -256,19 +228,18 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.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
+#ifdef CONFIG_NET_SCH_ESFQ_NFCT
+ 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 = ip_hdr(skb);
+ struct iphdr *iph = skb->nh.iph;
+ info.dst = iph->daddr;
+ info.src = iph->saddr;
+ if (!(iph->frag_off&htons(IP_MF|IP_OFFSET)) &&
@@ -284,7 +255,7 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ }
+ case __constant_htons(ETH_P_IPV6):
+ {
+ struct ipv6hdr *iph = ipv6_hdr(skb);
+ 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);
@@ -307,7 +278,7 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+
+ info.mark = skb->mark;
+
+#ifdef CONFIG_NF_CONNTRACK_ENABLED
+#ifdef CONFIG_NET_SCH_ESFQ_NFCT
+ /* defaults if there is no conntrack info */
+ info.ctorigsrc = info.src;
+ info.ctorigdst = info.dst;
@@ -332,23 +303,16 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ }
+#endif
+
+ switch(q->hash_kind)
+ {
+ 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
+#ifdef CONFIG_NET_SCH_ESFQ_NFCT
+ case TCA_SFQ_HASH_CTORIGDST:
+ return esfq_jhash_1word(q, info.ctorigdst);
+ case TCA_SFQ_HASH_CTORIGSRC:
@@ -357,6 +321,12 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ return esfq_jhash_1word(q, info.ctrepldst);
+ case TCA_SFQ_HASH_CTREPLSRC:
+ return esfq_jhash_1word(q, info.ctreplsrc);
+ case TCA_SFQ_HASH_CTNATCHG:
+ {
+ if (info.ctorigdst == info.ctreplsrc)
+ return esfq_jhash_1word(q, info.ctorigsrc);
+ return esfq_jhash_1word(q, info.ctreplsrc);
+ }
+#endif
+ default:
+ if (net_ratelimit())
@@ -451,10 +421,8 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ return 0;
+}
+
+static int
+esfq_enqueue(struct sk_buff *skb, struct Qdisc* sch)
+static void esfq_q_enqueue(struct sk_buff *skb, struct esfq_sched_data *q, unsigned int end)
+{
+ struct esfq_sched_data *q = qdisc_priv(sch);
+ unsigned hash = esfq_hash(q, skb);
+ unsigned depth = q->depth;
+ esfq_index x;
@@ -464,8 +432,12 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ q->ht[hash] = x = q->dep[depth].next;
+ q->hash[x] = hash;
+ }
+ sch->qstats.backlog += skb->len;
+ __skb_queue_tail(&q->qs[x], skb);
+
+ if (end == ESFQ_TAIL)
+ __skb_queue_tail(&q->qs[x], skb);
+ else
+ __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 */
@@ -478,43 +450,30 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ q->tail = x;
+ }
+ }
+}
+
+static int esfq_enqueue(struct sk_buff *skb, struct Qdisc* sch)
+{
+ struct esfq_sched_data *q = qdisc_priv(sch);
+ esfq_q_enqueue(skb, q, ESFQ_TAIL);
+ sch->qstats.backlog += skb->len;
+ if (++sch->q.qlen < q->limit-1) {
+ sch->bstats.bytes += skb->len;
+ sch->bstats.packets++;
+ return 0;
+ }
+
+ sch->qstats.drops++;
+ esfq_drop(sch);
+ return NET_XMIT_CN;
+}
+
+static int
+esfq_requeue(struct sk_buff *skb, struct Qdisc* sch)
+
+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;
+ }
+ esfq_q_enqueue(skb, q, ESFQ_HEAD);
+ 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;
@@ -525,13 +484,8 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ return NET_XMIT_CN;
+}
+
+
+
+
+static struct sk_buff *
+esfq_dequeue(struct Qdisc* sch)
+static struct sk_buff *esfq_q_dequeue(struct esfq_sched_data *q)
+{
+ struct esfq_sched_data *q = qdisc_priv(sch);
+ struct sk_buff *skb;
+ unsigned depth = q->depth;
+ esfq_index a, old_a;
@@ -539,15 +493,13 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ /* 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;
@@ -563,12 +515,48 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ a = q->next[a];
+ q->allot[a] += q->quantum;
+ }
+
+
+ return skb;
+}
+
+static void
+esfq_reset(struct Qdisc* sch)
+static struct sk_buff *esfq_dequeue(struct Qdisc* sch)
+{
+ struct esfq_sched_data *q = qdisc_priv(sch);
+ struct sk_buff *skb;
+
+ skb = esfq_q_dequeue(q);
+ if (skb == NULL)
+ return NULL;
+ sch->q.qlen--;
+ sch->qstats.backlog -= skb->len;
+ return skb;
+}
+
+static void esfq_q_destroy(struct esfq_sched_data *q)
+{
+ 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 void esfq_destroy(struct Qdisc *sch)
+{
+ struct esfq_sched_data *q = qdisc_priv(sch);
+ esfq_q_destroy(q);
+}
+
+
+static void esfq_reset(struct Qdisc* sch)
+{
+ struct sk_buff *skb;
+
@@ -589,36 +577,164 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ }
+}
+
+static unsigned int esfq_check_hash(unsigned int kind)
+{
+ switch (kind) {
+ case TCA_SFQ_HASH_CTORIGDST:
+ case TCA_SFQ_HASH_CTORIGSRC:
+ case TCA_SFQ_HASH_CTREPLDST:
+ case TCA_SFQ_HASH_CTREPLSRC:
+ case TCA_SFQ_HASH_CTNATCHG:
+#ifndef CONFIG_NET_SCH_ESFQ_NFCT
+ {
+ if (net_ratelimit())
+ printk(KERN_WARNING "ESFQ: Conntrack hash types disabled in kernel config. Falling back to classic.\n");
+ return TCA_SFQ_HASH_CLASSIC;
+ }
+#endif
+ case TCA_SFQ_HASH_CLASSIC:
+ case TCA_SFQ_HASH_DST:
+ case TCA_SFQ_HASH_SRC:
+ case TCA_SFQ_HASH_FWMARK:
+ return kind;
+ default:
+ {
+ if (net_ratelimit())
+ printk(KERN_WARNING "ESFQ: Unknown hash type. Falling back to classic.\n");
+ return TCA_SFQ_HASH_CLASSIC;
+ }
+ }
+}
+
+static int esfq_q_init(struct esfq_sched_data *q, struct rtattr *opt)
+{
+ struct tc_esfq_qopt *ctl = RTA_DATA(opt);
+ esfq_index p = ~0U/2;
+ int i;
+
+ if (opt && opt->rta_len < RTA_LENGTH(sizeof(*ctl)))
+ return -EINVAL;
+
+ q->perturbation = 0;
+ q->hash_kind = TCA_SFQ_HASH_CLASSIC;
+ q->max_depth = 0;
+ if (opt == NULL) {
+ q->perturb_period = 0;
+ q->hash_divisor = 1024;
+ q->tail = q->limit = q->depth = 128;
+
+ } else {
+ struct tc_esfq_qopt *ctl = RTA_DATA(opt);
+ if (ctl->quantum)
+ q->quantum = ctl->quantum;
+ 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 = esfq_check_hash(ctl->hash_kind);
+ }
+ }
+
+ 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:
+ esfq_q_destroy(q);
+ return -ENOBUFS;
+}
+
+static int esfq_init(struct Qdisc *sch, struct rtattr *opt)
+{
+ struct esfq_sched_data *q = qdisc_priv(sch);
+ int err;
+
+ q->quantum = psched_mtu(sch->dev); /* default */
+ if ((err = esfq_q_init(q, opt)))
+ return err;
+
+ init_timer(&q->perturb_timer);
+ q->perturb_timer.data = (unsigned long)sch;
+ q->perturb_timer.function = esfq_perturbation;
+ if (q->perturb_period) {
+ q->perturb_timer.expires = jiffies + q->perturb_period;
+ add_timer(&q->perturb_timer);
+ }
+
+ return 0;
+}
+
+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;
+ struct esfq_sched_data new;
+ struct sk_buff *skb;
+ int err;
+
+ /* set up new queue */
+ memset(&new, 0, sizeof(struct esfq_sched_data));
+ new.quantum = psched_mtu(sch->dev); /* default */
+ if ((err = esfq_q_init(&new, opt)))
+ return err;
+
+ /* copy all packets from the old queue to the new queue */
+ 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;
+ while ((skb = esfq_q_dequeue(q)) != NULL)
+ esfq_q_enqueue(skb, &new, ESFQ_TAIL);
+
+ /* clean up the old queue */
+ esfq_q_destroy(q);
+
+ if (ctl->limit)
+ q->limit = min_t(u32, ctl->limit, q->depth);
+ /* copy elements of the new queue into the old queue */
+ q->perturb_period = new.perturb_period;
+ q->quantum = new.quantum;
+ q->limit = new.limit;
+ q->depth = new.depth;
+ q->hash_divisor = new.hash_divisor;
+ q->hash_kind = new.hash_kind;
+ q->tail = new.tail;
+ q->max_depth = new.max_depth;
+ q->ht = new.ht;
+ q->dep = new.dep;
+ q->next = new.next;
+ q->allot = new.allot;
+ q->hash = new.hash;
+ q->qs = new.qs;
+
+ 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);
+ /* finish up */
+ if (q->perturb_period) {
+ q->perturb_timer.expires = jiffies + q->perturb_period;
+ add_timer(&q->perturb_timer);
@@ -629,124 +745,10 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ 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;
+ unsigned char *b = skb->tail;
+ struct tc_esfq_qopt opt;
+
+ opt.quantum = q->quantum;
@@ -779,7 +781,7 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+ .init = esfq_init,
+ .reset = esfq_reset,
+ .destroy = esfq_destroy,
+ .change = NULL, /* esfq_change - needs more work */
+ .change = esfq_change,
+ .dump = esfq_dump,
+ .owner = THIS_MODULE,
+};
@@ -788,7 +790,7 @@ Index: linux-2.6.23-rc6/net/sched/sch_esfq.c
+{
+ return register_qdisc(&esfq_qdisc_ops);
+}
+static void __exit esfq_module_exit(void)
+static void __exit esfq_module_exit(void)
+{
+ unregister_qdisc(&esfq_qdisc_ops);
+}