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iproute2: support latest cake & restore DSCP washing

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Support new packet overhead passing paradigm in cake qdisc, also restore
DSCP wash/nowash keywords.

Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
This commit is contained in:
Kevin Darbyshire-Bryant 2016-10-12 10:40:05 +01:00 committed by John Crispin
parent 1f0ff783f0
commit 88f8c8d7eb
1 changed files with 75 additions and 55 deletions
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130
package/network/utils/iproute2/patches/950-add-cake-to-tc.patch
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@ -1,6 +1,8 @@
diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
index 8d2530d..028b83c 100644
--- a/include/linux/pkt_sched.h
+++ b/include/linux/pkt_sched.h
@@ -850,4 +850,57 @@ struct tc_pie_xstats {
@@ -850,4 +850,59 @@ struct tc_pie_xstats {
__u32 maxq; /* maximum queue size */
__u32 ecn_mark; /* packets marked with ecn*/
};
@ -18,6 +20,8 @@
+ TCA_CAKE_AUTORATE,
+ TCA_CAKE_MEMORY,
+ TCA_CAKE_NAT,
+ TCA_CAKE_ETHERNET,
+ TCA_CAKE_WASH,
+ __TCA_CAKE_MAX
+};
+#define TCA_CAKE_MAX (__TCA_CAKE_MAX - 1)
@ -58,6 +62,8 @@
+};
+
#endif
diff --git a/tc/Makefile b/tc/Makefile
index 56acbaa..d421b8e 100644
--- a/tc/Makefile
+++ b/tc/Makefile
@@ -63,6 +63,7 @@ TCMODULES += q_codel.o
@ -68,9 +74,12 @@
TCMODULES += q_hhf.o
TCMODULES += e_bpf.o
diff --git a/tc/q_cake.c b/tc/q_cake.c
new file mode 100644
index 0000000..14e5aab
--- /dev/null
+++ b/tc/q_cake.c
@@ -0,0 +1,643 @@
@@ -0,0 +1,654 @@
+/*
+ * Common Applications Kept Enhanced -- CAKE
+ *
@ -129,6 +138,7 @@
+ " [ besteffort | precedence | diffserv8 | diffserv4* ]\n"
+ " [ flowblind | srchost | dsthost | hosts | flows* | dual-srchost | dual-dsthost | triple-isolate ] [ nat | nonat* ]\n"
+ " [ ptm | atm | noatm* ] [ overhead N | conservative | raw* ]\n"
+ " [ wash | nowash* ]\n"
+ " [ memlimit LIMIT ]\n"
+ " (* marks defaults)\n");
+}
@ -144,6 +154,8 @@
+ unsigned memlimit = 0;
+ int overhead = 0;
+ bool overhead_set = false;
+ bool overhead_override = false;
+ int wash = -1;
+ int flowmode = -1;
+ int nat = -1;
+ int atm = -1;
@ -213,6 +225,11 @@
+ } else if (strcmp(*argv, "diffserv-llt") == 0) {
+ diffserv = 5;
+
+ } else if (strcmp(*argv, "nowash") == 0) {
+ wash = 0;
+ } else if (strcmp(*argv, "wash") == 0) {
+ wash = 1;
+
+ } else if (strcmp(*argv, "flowblind") == 0) {
+ flowmode = 0;
+ } else if (strcmp(*argv, "srchost") == 0) {
@ -246,6 +263,7 @@
+ atm = 0;
+ overhead = 0;
+ overhead_set = true;
+ overhead_override = true;
+ } else if (strcmp(*argv, "conservative") == 0) {
+ /*
+ * Deliberately over-estimate overhead:
@ -256,28 +274,6 @@
+ overhead = 48;
+ overhead_set = true;
+
+ /*
+ * DOCSIS overhead figures courtesy of Greg White @ CableLabs.
+ * The "-ip" versions include the Ethernet frame header, in case
+ * you are shaping an IP interface instead of an Ethernet one.
+ */
+ } else if (strcmp(*argv, "docsis-downstream-ip") == 0) {
+ atm = 0;
+ overhead += 35;
+ overhead_set = true;
+ } else if (strcmp(*argv, "docsis-downstream") == 0) {
+ atm = 0;
+ overhead += 35 - 14;
+ overhead_set = true;
+ } else if (strcmp(*argv, "docsis-upstream-ip") == 0) {
+ atm = 0;
+ overhead += 28;
+ overhead_set = true;
+ } else if (strcmp(*argv, "docsis-upstream") == 0) {
+ atm = 0;
+ overhead += 28 - 14;
+ overhead_set = true;
+
+ /* Various ADSL framing schemes, all over ATM cells */
+ } else if (strcmp(*argv, "ipoa-vcmux") == 0) {
+ atm = 1;
@ -325,38 +321,38 @@
+
+ } else if (strcmp(*argv, "via-ethernet") == 0) {
+ /*
+ * The above overheads are relative to an IP packet,
+ * but Linux includes Ethernet framing overhead already
+ * if we are shaping an Ethernet interface rather than
+ * an IP interface.
+ * We used to use this flag to manually compensate for
+ * Linux including the Ethernet header on Ethernet-type
+ * interfaces, but not on IP-type interfaces.
+ *
+ * It is no longer needed, because Cake now adjusts for
+ * that automatically, and is thus ignored.
+ *
+ * It would be deleted entirely, but it appears in the
+ * stats output when the automatic compensation is active.
+ */
+ overhead -= 14;
+ overhead_set = true;
+
+ /* Additional Ethernet-related overheads used by some ISPs */
+ } else if (strcmp(*argv, "ether-phy") == 0) {
+ /* ethernet pre-amble & interframe gap 20 bytes
+ * Linux will have already accounted for MACs & frame type 14 bytes
+ * you probably want to add an FCS as well*/
+ overhead += 20;
+ overhead_set = true;
+ } else if (strcmp(*argv, "ether-all") == 0) {
+ } else if (strcmp(*argv, "ethernet") == 0) {
+ /* ethernet pre-amble & interframe gap & FCS
+ * Linux will have already accounted for MACs & frame type 14 bytes
+ * you may need to add vlan tag*/
+ overhead += 24;
+ * you may need to add vlan tag */
+ overhead += 38;
+ overhead_set = true;
+
+ } else if (strcmp(*argv, "ether-fcs") == 0) {
+ /* Frame Check Sequence */
+ /* we ignore the minimum frame size, because IP packets usually meet it */
+ overhead += 4;
+ overhead_set = true;
+ /* Additional Ethernet-related overhead used by some ISPs */
+ } else if (strcmp(*argv, "ether-vlan") == 0) {
+ /* 802.1q VLAN tag - may be repeated */
+ overhead += 4;
+ overhead_set = true;
+
+ /*
+ * DOCSIS cable shapers account for Ethernet frame with FCS,
+ * but not interframe gap nor preamble.
+ */
+ } else if (strcmp(*argv, "docsis") == 0) {
+ atm = 0;
+ overhead += 18;
+ overhead_set = true;
+
+ } else if (strcmp(*argv, "overhead") == 0) {
+ char* p = NULL;
+ NEXT_ARG();
@ -397,6 +393,10 @@
+ addattr_l(n, 1024, TCA_CAKE_FLOW_MODE, &flowmode, sizeof(flowmode));
+ if (overhead_set)
+ addattr_l(n, 1024, TCA_CAKE_OVERHEAD, &overhead, sizeof(overhead));
+ if (overhead_override) {
+ unsigned zero = 0;
+ addattr_l(n, 1024, TCA_CAKE_ETHERNET, &zero, sizeof(zero));
+ }
+ if (interval)
+ addattr_l(n, 1024, TCA_CAKE_RTT, &interval, sizeof(interval));
+ if (target)
@ -407,6 +407,8 @@
+ addattr_l(n, 1024, TCA_CAKE_MEMORY, &memlimit, sizeof(memlimit));
+ if (nat != -1)
+ addattr_l(n, 1024, TCA_CAKE_NAT, &nat, sizeof(nat));
+ if (wash != -1)
+ addattr_l(n, 1024, TCA_CAKE_WASH, &wash, sizeof(wash));
+
+ tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
+ return 0;
@ -422,9 +424,11 @@
+ unsigned interval = 0;
+ unsigned memlimit = 0;
+ int overhead = 0;
+ int ethernet = 0;
+ int atm = 0;
+ int nat = 0;
+ int autorate = 0;
+ int wash = 0;
+ SPRINT_BUF(b1);
+ SPRINT_BUF(b2);
+
@ -511,6 +515,10 @@
+ if(nat)
+ fprintf(f, "nat ");
+ }
+ if (tb[TCA_CAKE_WASH] &&
+ RTA_PAYLOAD(tb[TCA_CAKE_WASH]) >= sizeof(__u32)) {
+ wash = rta_getattr_u32(tb[TCA_CAKE_WASH]);
+ }
+ if (tb[TCA_CAKE_ATM] &&
+ RTA_PAYLOAD(tb[TCA_CAKE_ATM]) >= sizeof(__u32)) {
+ atm = rta_getattr_u32(tb[TCA_CAKE_ATM]);
@ -519,26 +527,38 @@
+ RTA_PAYLOAD(tb[TCA_CAKE_OVERHEAD]) >= sizeof(__u32)) {
+ overhead = rta_getattr_u32(tb[TCA_CAKE_OVERHEAD]);
+ }
+ if (tb[TCA_CAKE_ETHERNET] &&
+ RTA_PAYLOAD(tb[TCA_CAKE_ETHERNET]) >= sizeof(__u32)) {
+ ethernet = rta_getattr_u32(tb[TCA_CAKE_ETHERNET]);
+ }
+ if (tb[TCA_CAKE_RTT] &&
+ RTA_PAYLOAD(tb[TCA_CAKE_RTT]) >= sizeof(__u32)) {
+ interval = rta_getattr_u32(tb[TCA_CAKE_RTT]);
+ }
+
+ if (wash)
+ fprintf(f,"wash ");
+
+ if (interval)
+ fprintf(f, "rtt %s ", sprint_time(interval, b2));
+
+ if (atm == 1)
+ fprintf(f, "atm ");
+ else if (atm == 2)
+ fprintf(f, "ptm ");
+ else if (overhead)
+ fprintf(f, "noatm ");
+ if (!atm && overhead == ethernet) {
+ fprintf(f, "raw ");
+ } else {
+ if (atm == 1)
+ fprintf(f, "atm ");
+ else if (atm == 2)
+ fprintf(f, "ptm ");
+ else
+ fprintf(f, "noatm ");
+
+ if (overhead || atm)
+ fprintf(f, "overhead %d ", overhead);
+
+ if (!atm && !overhead)
+ fprintf(f, "raw ");
+ // This is actually the *amount* of automatic compensation, but we only report
+ // its presence as a boolean for now.
+ if (ethernet)
+ fprintf(f, "via-ethernet ");
+ }
+
+ if (memlimit)
+ fprintf(f, "memlimit %s", sprint_size(memlimit, b1));