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-rw-r--r--package/iproute2/patches/006-iproute2-tc_esfq.patch295
-rw-r--r--target/linux/generic-2.4/patches/620-tc_esfq.patch747
2 files changed, 1042 insertions, 0 deletions
diff --git a/package/iproute2/patches/006-iproute2-tc_esfq.patch b/package/iproute2/patches/006-iproute2-tc_esfq.patch
new file mode 100644
index 000000000..d0347549d
--- /dev/null
+++ b/package/iproute2/patches/006-iproute2-tc_esfq.patch
@@ -0,0 +1,295 @@
+diff -urN --exclude=.svn iproute2-2.6.11-050330/include/linux/pkt_sched.h iproute2-2.6.11-050330/include/linux/pkt_sched.h
+--- iproute2-2.6.11-050330/include/linux/pkt_sched.h 2007-05-04 22:21:48.000000000 -0400
++++ iproute2-2.6.11-050330/include/linux/pkt_sched.h 2007-05-04 22:27:12.000000000 -0400
+@@ -174,8 +174,38 @@
+ *
+ * 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,
++ /* 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
++{
++ 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
+@@ -551,8 +580,37 @@
+ *
+ * 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.
+ */
+
++/* ESFQ section */
++
++enum
++{
++ /* traditional */
++ TCA_SFQ_HASH_CLASSIC,
++ TCA_SFQ_HASH_DST,
++ TCA_SFQ_HASH_SRC,
++ /* 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
++{
++ 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
+diff -urN --exclude=.svn iproute2-2.6.11-050330/tc/Makefile iproute2-2.6.11-050330/tc/Makefile
+--- iproute2-2.6.11-050330/tc/Makefile 2007-05-04 22:21:48.000000000 -0400
++++ iproute2-2.6.11-050330/tc/Makefile 2007-05-04 22:27:37.000000000 -0400
+@@ -6,6 +6,7 @@
+ TCMODULES :=
+ TCMODULES += q_fifo.o
+ TCMODULES += q_sfq.o
++TCMODULES += q_esfq.o
+ TCMODULES += q_red.o
+ TCMODULES += q_prio.o
+ TCMODULES += q_tbf.o
+diff -urN --exclude=.svn iproute2-2.6.11-050330/tc/q_esfq.c iproute2-2.6.11-050330/tc/q_esfq.c
+--- iproute2-2.6.11-050330/tc/q_esfq.c 1969-12-31 19:00:00.000000000 -0500
++++ iproute2-2.6.11-050330/tc/q_esfq.c 2007-05-04 22:37:54.000000000 -0400
+@@ -0,0 +1,200 @@
++/*
++ * q_esfq.c ESFQ.
++ *
++ * 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>
++ * Alexander Clouter, <alex@digriz.org.uk>
++ * Corey Hickey, <bugfood-c@fatooh.org>
++ *
++ */
++
++#include <stdio.h>
++#include <stdlib.h>
++#include <unistd.h>
++#include <syslog.h>
++#include <fcntl.h>
++#include <math.h>
++#include <sys/socket.h>
++#include <netinet/in.h>
++#include <arpa/inet.h>
++#include <string.h>
++
++#include "utils.h"
++#include "tc_util.h"
++
++static void explain(void)
++{
++ fprintf(stderr, "Usage: ... esfq [ perturb SECS ] [ quantum BYTES ] [ depth FLOWS ]\n\t[ divisor HASHBITS ] [ limit PKTS ] [ hash HASHTYPE]\n");
++ fprintf(stderr,"Where: \n");
++ fprintf(stderr,"HASHTYPE := { classic | src | dst | ctorigdst | ctorigsrc | ctrepldst | ctreplsrc | ctnatchg }\n");
++}
++
++#define usage() return(-1)
++
++static int esfq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
++{
++ int ok=0;
++ struct tc_esfq_qopt opt;
++
++ memset(&opt, 0, sizeof(opt));
++
++ opt.hash_kind= TCA_SFQ_HASH_CLASSIC;
++
++ while (argc > 0) {
++ if (strcmp(*argv, "quantum") == 0) {
++ NEXT_ARG();
++ if (get_size(&opt.quantum, *argv)) {
++ fprintf(stderr, "Illegal \"quantum\"\n");
++ return -1;
++ }
++ ok++;
++ } else if (strcmp(*argv, "perturb") == 0) {
++ NEXT_ARG();
++ if (get_integer(&opt.perturb_period, *argv, 0)) {
++ fprintf(stderr, "Illegal \"perturb\"\n");
++ return -1;
++ }
++ ok++;
++ } else if (strcmp(*argv, "depth") == 0) {
++ NEXT_ARG();
++ if (get_integer((int *) &opt.flows, *argv, 0)) {
++ fprintf(stderr, "Illegal \"depth\"\n");
++ return -1;
++ }
++ ok++;
++ } else if (strcmp(*argv, "divisor") == 0) {
++ NEXT_ARG();
++ if (get_integer((int *) &opt.divisor, *argv, 0)) {
++ fprintf(stderr, "Illegal \"divisor\"\n");
++ return -1;
++ }
++ if(opt.divisor >= 14) {
++ fprintf(stderr, "Illegal \"divisor\": must be < 14\n");
++ return -1;
++ }
++ opt.divisor=pow(2,opt.divisor);
++ ok++;
++ } else if (strcmp(*argv, "limit") == 0) {
++ NEXT_ARG();
++ if (get_integer((int *) &opt.limit, *argv, 0)) {
++ fprintf(stderr, "Illegal \"limit\"\n");
++ return -1;
++ }
++ ok++;
++ } else if (strcmp(*argv, "hash") == 0) {
++ NEXT_ARG();
++ if(strcmp(*argv, "classic") == 0) {
++ opt.hash_kind= TCA_SFQ_HASH_CLASSIC;
++ } else
++ if(strcmp(*argv, "dst") == 0) {
++ opt.hash_kind= TCA_SFQ_HASH_DST;
++ } else
++ if(strcmp(*argv, "src") == 0) {
++ opt.hash_kind= TCA_SFQ_HASH_SRC;
++ } else
++ if(strcmp(*argv, "ctorigsrc") == 0) {
++ opt.hash_kind= TCA_SFQ_HASH_CTORIGSRC;
++ } else
++ if(strcmp(*argv, "ctorigdst") == 0) {
++ opt.hash_kind= TCA_SFQ_HASH_CTORIGDST;
++ } else
++ if(strcmp(*argv, "ctreplsrc") == 0) {
++ opt.hash_kind= TCA_SFQ_HASH_CTREPLSRC;
++ } else
++ if(strcmp(*argv, "ctrepldst") == 0) {
++ opt.hash_kind= TCA_SFQ_HASH_CTREPLDST;
++ } else
++ if(strcmp(*argv, "ctnatchg") == 0) {
++ opt.hash_kind= TCA_SFQ_HASH_CTNATCHG;
++ } else {
++ fprintf(stderr, "Illegal \"hash\"\n");
++ explain();
++ return -1;
++ }
++ ok++;
++ } else if (strcmp(*argv, "help") == 0) {
++ explain();
++ return -1;
++ } else {
++ fprintf(stderr, "What is \"%s\"?\n", *argv);
++ explain();
++ return -1;
++ }
++ argc--; argv++;
++ }
++
++ if (ok)
++ addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
++ return 0;
++}
++
++static int esfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
++{
++ struct tc_esfq_qopt *qopt;
++ SPRINT_BUF(b1);
++
++ if (opt == NULL)
++ return 0;
++
++ if (RTA_PAYLOAD(opt) < sizeof(*qopt))
++ return -1;
++ qopt = RTA_DATA(opt);
++ fprintf(f, "quantum %s ", sprint_size(qopt->quantum, b1));
++ if (show_details) {
++ fprintf(f, "limit %up flows %u/%u ",
++ qopt->limit, qopt->flows, qopt->divisor);
++ }
++ if (qopt->perturb_period)
++ fprintf(f, "perturb %dsec ", qopt->perturb_period);
++
++ fprintf(f,"hash: ");
++ switch(qopt->hash_kind)
++ {
++ case TCA_SFQ_HASH_CLASSIC:
++ fprintf(f,"classic");
++ break;
++ case TCA_SFQ_HASH_DST:
++ fprintf(f,"dst");
++ break;
++ case TCA_SFQ_HASH_SRC:
++ fprintf(f,"src");
++ break;
++ case TCA_SFQ_HASH_CTORIGSRC:
++ fprintf(f,"ctorigsrc");
++ break;
++ case TCA_SFQ_HASH_CTORIGDST:
++ fprintf(f,"ctorigdst");
++ break;
++ case TCA_SFQ_HASH_CTREPLSRC:
++ fprintf(f,"ctreplsrc");
++ break;
++ case TCA_SFQ_HASH_CTREPLDST:
++ fprintf(f,"ctrepldst");
++ break;
++ case TCA_SFQ_HASH_CTNATCHG:
++ fprintf(f,"ctnatchg");
++ break;
++ default:
++ fprintf(f,"Unknown");
++ }
++ return 0;
++}
++
++static int esfq_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
++{
++ return 0;
++}
++
++
++struct qdisc_util esfq_qdisc_util = {
++ .id = "esfq",
++ .parse_qopt = esfq_parse_opt,
++ .print_qopt = esfq_print_opt,
++ .print_xstats = esfq_print_xstats,
++};
diff --git a/target/linux/generic-2.4/patches/620-tc_esfq.patch b/target/linux/generic-2.4/patches/620-tc_esfq.patch
new file mode 100644
index 000000000..d342042c4
--- /dev/null
+++ b/target/linux/generic-2.4/patches/620-tc_esfq.patch
@@ -0,0 +1,747 @@
+diff -urN target.old/linux/generic-2.4/patches/232-esfq_kmod.patch target/linux/generic-2.4/patches/232-esfq_kmod.patch
+--- target.old/linux/generic-2.4/patches/232-esfq_kmod.patch 1969-12-31 19:00:00.000000000 -0500
++++ target/linux/generic-2.4/patches/232-esfq_kmod.patch 2007-06-08 02:35:06.000000000 -0400
+@@ -0,0 +1,743 @@
++diff -urN linux-2.4.34/Documentation/Configure.help linux-2.4.34/Documentation/Configure.help
++--- linux-2.4.34/Documentation/Configure.help 2007-05-10 19:37:42.000000000 -0400
+++++ linux-2.4.34/Documentation/Configure.help 2007-05-10 19:49:49.000000000 -0400
++@@ -11127,6 +11127,24 @@
++ whenever you want). If you want to compile it as a module, say M
++ here and read <file:Documentation/modules.txt>.
++
+++ESFQ queue
+++CONFIG_NET_SCH_ESFQ
+++ Say Y here if you want to use the Stochastic Fairness Queueing (SFQ)
+++ packet scheduling algorithm for some of your network devices or as a
+++ leaf discipline for the CBQ scheduling algorithm (see the top of
+++ <file:net/sched/sch_esfq.c> for details and references about the SFQ
+++ algorithm).
+++
+++ This is an enchanced SFQ version which allows you to control the
+++ hardcoded values in the SFQ scheduler: queue depth, hash table size,
+++ queues limit. Also adds control to the hash function used to identify
+++ packet flows. Hash by src or dst ip and original sfq hash.
+++
+++ This code is also available as a module called sch_esfq.o ( = code
+++ which can be inserted in and removed from the running kernel
+++ whenever you want). If you want to compile it as a module, say M
+++ here and read <file:Documentation/modules.txt>.
+++
++ CSZ packet scheduler
++ CONFIG_NET_SCH_CSZ
++ Say Y here if you want to use the Clark-Shenker-Zhang (CSZ) packet
++diff -urN linux-2.4.34/include/linux/pkt_sched.h linux-2.4.34/include/linux/pkt_sched.h
++--- linux-2.4.34/include/linux/pkt_sched.h 2007-05-10 19:38:19.000000000 -0400
+++++ linux-2.4.34/include/linux/pkt_sched.h 2007-05-10 19:53:59.000000000 -0400
++@@ -173,8 +173,36 @@
++ *
++ * 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,
+++ /* 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
+++{
+++ 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
++diff -urN linux-2.4.34/net/sched/Config.in linux-2.4.34/net/sched/Config.in
++--- linux-2.4.34/net/sched/Config.in 2007-05-10 19:38:31.000000000 -0400
+++++ linux-2.4.34/net/sched/Config.in 2007-05-10 19:54:45.000000000 -0400
++@@ -12,6 +12,7 @@
++ tristate ' The simplest PRIO pseudoscheduler' CONFIG_NET_SCH_PRIO
++ tristate ' RED queue' CONFIG_NET_SCH_RED
++ tristate ' SFQ queue' CONFIG_NET_SCH_SFQ
+++tristate ' ESFQ queue' CONFIG_NET_SCH_ESFQ
++ tristate ' TEQL queue' CONFIG_NET_SCH_TEQL
++ tristate ' TBF queue' CONFIG_NET_SCH_TBF
++ tristate ' GRED queue' CONFIG_NET_SCH_GRED
++diff -urN linux-2.4.34/net/sched/Makefile linux-2.4.34/net/sched/Makefile
++--- linux-2.4.34/net/sched/Makefile 2007-05-10 19:38:31.000000000 -0400
+++++ linux-2.4.34/net/sched/Makefile 2007-05-10 19:55:13.000000000 -0400
++@@ -19,6 +19,7 @@
++ obj-$(CONFIG_NET_SCH_HFSC) += sch_hfsc.o
++ obj-$(CONFIG_NET_SCH_HTB) += sch_htb.o
++ obj-$(CONFIG_NET_SCH_SFQ) += sch_sfq.o
+++obj-$(CONFIG_NET_SCH_ESFQ) += sch_esfq.o
++ obj-$(CONFIG_NET_SCH_RED) += sch_red.o
++ obj-$(CONFIG_NET_SCH_TBF) += sch_tbf.o
++ obj-$(CONFIG_NET_SCH_PRIO) += sch_prio.o
++diff -urN linux-2.4.34/net/sched/sch_esfq.c linux-2.4.34/net/sched/sch_esfq.c
++--- linux-2.4.34/net/sched/sch_esfq.c 1969-12-31 19:00:00.000000000 -0500
+++++ linux-2.4.34/net/sched/sch_esfq.c 2007-05-10 19:57:15.000000000 -0400
++@@ -0,0 +1,649 @@
+++/*
+++ * 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 usage of jhash.
+++ *
+++ */
+++
+++#include <linux/config.h>
+++#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/sched.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 <net/route.h>
+++#include <linux/skbuff.h>
+++#include <net/sock.h>
+++#include <net/pkt_sched.h>
+++#include <linux/jhash.h>
+++
+++#define IPPROTO_DCCP 33
+++#define qdisc_priv(q) ((void *)(q->data))
+++
+++#ifdef CONFIG_IP_NF_CONNTRACK
+++/* #include <net/netfilter/nf_conntrack.h> */
+++#include <linux/netfilter_ipv4/ip_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
+++ ctorigdst: original destination IP address
+++ ctorigsrc: original source IP address
+++ ctrepldst: reply destination IP address
+++ ctreplsrc: reply source IP
+++ ctnatchg: use the address which changed via nat
+++
+++*/
+++
+++
+++/* 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 */
+++};
+++
+++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_IP_NF_CONNTRACK
+++ enum ip_conntrack_info ctinfo;
+++ struct ip_conntrack *ct = ip_conntrack_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;
+++ }
+++ default:
+++ info.dst = (u32)(unsigned long)skb->dst;
+++ info.src = (u32)(unsigned long)skb->sk;
+++ info.proto = skb->protocol;
+++ }
+++
+++#ifdef CONFIG_IP_NF_CONNTRACK
+++ /* 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 */
+++ IP_NF_ASSERT(ct);
+++ if (ct) {
+++ if (skb->protocol == __constant_htons(ETH_P_IP)) {
+++ info.ctorigsrc = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
+++ info.ctorigdst = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
+++ info.ctreplsrc = ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip;
+++ info.ctrepldst = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
+++ }
+++ }
+++#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_SRC:
+++ return esfq_jhash_1word(q, info.src);
+++#ifdef CONFIG_IP_NF_CONNTRACK
+++ 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);
+++ case TCA_SFQ_HASH_CTNATCHG:
+++ {
+++ if (info.ctorigdst == info.ctreplsrc)
+++ return esfq_jhash_1word(q, info.ctorigsrc);
+++ else
+++ 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->stats.drops++;
+++ sch->stats.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->stats.drops++;
+++ sch->stats.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->stats.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->stats.bytes += skb->len;
+++ sch->stats.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->stats.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) {
+++ return 0;
+++ }
+++
+++ sch->stats.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->stats.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,
+++};
+++
+++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");
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 10:41:17 +0000