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tc: fq: allow setting and retrieving orphan_mask 

linux-3.19 fq packet scheduler got a new attribute, controlling
number of 'flows' holding packets not attached to a socket
(forwarding usage)

kernel commit is 06eb395fa9856b5a87cf7d80baee2a0ed3cdb9d7
("pkt_sched: fq: better control of DDOS traffic")

This patch adds corresponding code to tc command.

tc qd replace dev eth0 root fq orphan_mask 511

Signed-off-by: Eric Dumazet <edumazet@google.com>
This commit is contained in:
Eric Dumazet 2015-09-24 04:43:26 -07:00 committed by Stephen Hemminger
parent a8e35427fb
commit 8d5bd8c302
1 changed files with 20 additions and 1 deletions
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21
tc/q_fq.c
View File

@ -1,7 +1,7 @@
/*
* Fair Queue
*
* Copyright (C) 2013 Eric Dumazet <edumazet@google.com>
* Copyright (C) 2013-2015 Eric Dumazet <edumazet@google.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -55,6 +55,7 @@ static void explain(void)
fprintf(stderr, " [ quantum BYTES ] [ initial_quantum BYTES ]\n");
fprintf(stderr, " [ maxrate RATE ] [ buckets NUMBER ]\n");
fprintf(stderr, " [ [no]pacing ] [ refill_delay TIME ]\n");
fprintf(stderr, " [ orphan_mask MASK]\n");
}
static unsigned int ilog2(unsigned int val)
@ -80,6 +81,7 @@ static int fq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
unsigned int maxrate;
unsigned int defrate;
unsigned int refill_delay;
unsigned int orphan_mask;
bool set_plimit = false;
bool set_flow_plimit = false;
bool set_quantum = false;
@ -87,6 +89,7 @@ static int fq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
bool set_maxrate = false;
bool set_defrate = false;
bool set_refill_delay = false;
bool set_orphan_mask = false;
int pacing = -1;
struct rtattr *tail;
@ -139,6 +142,13 @@ static int fq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
return -1;
}
set_initial_quantum = true;
} else if (strcmp(*argv, "orphan_mask") == 0) {
NEXT_ARG();
if (get_unsigned(&orphan_mask, *argv, 0)) {
fprintf(stderr, "Illegal \"initial_quantum\"\n");
return -1;
}
set_orphan_mask = true;
} else if (strcmp(*argv, "refill_delay") == 0) {
NEXT_ARG();
if (get_time(&refill_delay, *argv)) {
@ -192,6 +202,9 @@ static int fq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
if (set_refill_delay)
addattr_l(n, 1024, TCA_FQ_FLOW_REFILL_DELAY,
&refill_delay, sizeof(refill_delay));
if (set_orphan_mask)
addattr_l(n, 1024, TCA_FQ_ORPHAN_MASK,
&orphan_mask, sizeof(refill_delay));
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
return 0;
}
@ -204,6 +217,7 @@ static int fq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
int pacing;
unsigned int rate, quantum;
unsigned int refill_delay;
unsigned int orphan_mask;
SPRINT_BUF(b1);
if (opt == NULL)
@ -226,6 +240,11 @@ static int fq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
buckets_log = rta_getattr_u32(tb[TCA_FQ_BUCKETS_LOG]);
fprintf(f, "buckets %u ", 1U << buckets_log);
}
if (tb[TCA_FQ_ORPHAN_MASK] &&
RTA_PAYLOAD(tb[TCA_FQ_ORPHAN_MASK]) >= sizeof(__u32)) {
orphan_mask = rta_getattr_u32(tb[TCA_FQ_ORPHAN_MASK]);
fprintf(f, "orphan_mask %u ", orphan_mask);
}
if (tb[TCA_FQ_RATE_ENABLE] &&
RTA_PAYLOAD(tb[TCA_FQ_RATE_ENABLE]) >= sizeof(int)) {
pacing = rta_getattr_u32(tb[TCA_FQ_RATE_ENABLE]);