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Date: Tue, 13 May 2014 12:20:52 +0800
From: Yang Yingliang <yangyingliang@...wei.com>
To: Eric Dumazet <eric.dumazet@...il.com>, <stephen@...workplumber.org>
CC: <netdev@...r.kernel.org>
Subject: [PATCH iproute2 v3] fq: allow options of fair queue set to ~0U
From: Yang Yingliang <yangyingliang@...wei.com>
Some options of fair queue cannot be (~0U). It leads to maxrate
cannot be reset to unlimited because it cannot be (~0U).
Tested by the following command:
# tc qdisc replace dev eth4 root handle 1: fq limit 2000 maxrate 100mbit quantum 2000 initial_quantum 1600
# tc -s -d qdisc show
qdisc fq 1: dev eth4 root refcnt 2 limit 100p flow_limit 2000p buckets 1024 quantum 2000 initial_quantum 1600 maxrate 100Mbit
Sent 12596 bytes 82 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
2 flows (1 inactive, 0 throttled)
0 gc, 0 highprio, 0 throttled
# tc qdisc replace dev eth4 root handle 1: fq limit 100 maxrate 34359738360 quantum 2000 initial_quantum 1600
# tc -s -d qdisc show
qdisc fq 1: dev eth4 root refcnt 2 limit 100p flow_limit 100p buckets 1024 quantum 2000 initial_quantum 1600
Sent 15758 bytes 99 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
2 flows (1 inactive, 0 throttled)
0 gc, 0 highprio, 0 throttled
Suggested-by: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
tc/q_fq.c | 36 ++++++++++++++++++++++++------------
1 file changed, 24 insertions(+), 12 deletions(-)
diff --git a/tc/q_fq.c b/tc/q_fq.c
index c1f658e..6a493a5 100644
--- a/tc/q_fq.c
+++ b/tc/q_fq.c
@@ -71,13 +71,19 @@ static unsigned int ilog2(unsigned int val)
static int fq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
struct nlmsghdr *n)
{
- unsigned int plimit = ~0U;
- unsigned int flow_plimit = ~0U;
- unsigned int quantum = ~0U;
- unsigned int initial_quantum = ~0U;
+ unsigned int plimit;
+ unsigned int flow_plimit;
+ unsigned int quantum;
+ unsigned int initial_quantum;
unsigned int buckets = 0;
- unsigned int maxrate = ~0U;
- unsigned int defrate = ~0U;
+ unsigned int maxrate;
+ unsigned int defrate;
+ int set_plimit = 0;
+ int set_flow_plimit = 0;
+ int set_quantum = 0;
+ int set_initial_quantum = 0;
+ int set_maxrate = 0;
+ int set_defrate = 0;
int pacing = -1;
struct rtattr *tail;
@@ -88,12 +94,14 @@ static int fq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
fprintf(stderr, "Illegal \"limit\"\n");
return -1;
}
+ set_plimit = 1;
} else if (strcmp(*argv, "flow_limit") == 0) {
NEXT_ARG();
if (get_unsigned(&flow_plimit, *argv, 0)) {
fprintf(stderr, "Illegal \"flow_limit\"\n");
return -1;
}
+ set_flow_plimit = 1;
} else if (strcmp(*argv, "buckets") == 0) {
NEXT_ARG();
if (get_unsigned(&buckets, *argv, 0)) {
@@ -106,24 +114,28 @@ static int fq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
fprintf(stderr, "Illegal \"maxrate\"\n");
return -1;
}
+ set_maxrate = 1;
} else if (strcmp(*argv, "defrate") == 0) {
NEXT_ARG();
if (get_rate(&defrate, *argv)) {
fprintf(stderr, "Illegal \"defrate\"\n");
return -1;
}
+ set_defrate = 1;
} else if (strcmp(*argv, "quantum") == 0) {
NEXT_ARG();
if (get_unsigned(&quantum, *argv, 0)) {
fprintf(stderr, "Illegal \"quantum\"\n");
return -1;
}
+ set_quantum = 1;
} else if (strcmp(*argv, "initial_quantum") == 0) {
NEXT_ARG();
if (get_unsigned(&initial_quantum, *argv, 0)) {
fprintf(stderr, "Illegal \"initial_quantum\"\n");
return -1;
}
+ set_initial_quantum = 1;
} else if (strcmp(*argv, "pacing") == 0) {
pacing = 1;
} else if (strcmp(*argv, "nopacing") == 0) {
@@ -147,24 +159,24 @@ static int fq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
addattr_l(n, 1024, TCA_FQ_BUCKETS_LOG,
&log, sizeof(log));
}
- if (plimit != ~0U)
+ if (set_plimit)
addattr_l(n, 1024, TCA_FQ_PLIMIT,
&plimit, sizeof(plimit));
- if (flow_plimit != ~0U)
+ if (set_flow_plimit)
addattr_l(n, 1024, TCA_FQ_FLOW_PLIMIT,
&flow_plimit, sizeof(flow_plimit));
- if (quantum != ~0U)
+ if (set_quantum)
addattr_l(n, 1024, TCA_FQ_QUANTUM, &quantum, sizeof(quantum));
- if (initial_quantum != ~0U)
+ if (set_initial_quantum)
addattr_l(n, 1024, TCA_FQ_INITIAL_QUANTUM,
&initial_quantum, sizeof(initial_quantum));
if (pacing != -1)
addattr_l(n, 1024, TCA_FQ_RATE_ENABLE,
&pacing, sizeof(pacing));
- if (maxrate != ~0U)
+ if (set_maxrate)
addattr_l(n, 1024, TCA_FQ_FLOW_MAX_RATE,
&maxrate, sizeof(maxrate));
- if (defrate != ~0U)
+ if (set_defrate)
addattr_l(n, 1024, TCA_FQ_FLOW_DEFAULT_RATE,
&defrate, sizeof(defrate));
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
--
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