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From 0b66dc13c157f4d34518c06dd774ef39be0df271 Mon Sep 17 00:00:00 2001
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Message-Id: <0b66dc13c157f4d34518c06dd774ef39be0df271.1628790091.git.aclaudi@redhat.com>
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In-Reply-To: <650694eb0120722499207078f965442ef7343bb1.1628790091.git.aclaudi@redhat.com>
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References: <650694eb0120722499207078f965442ef7343bb1.1628790091.git.aclaudi@redhat.com>
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From: Andrea Claudi <aclaudi@redhat.com>
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Date: Thu, 12 Aug 2021 18:26:39 +0200
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Subject: [PATCH] tc: htb: improve burst error messages
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1910745
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Upstream Status: iproute2.git commit e44786b2
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commit e44786b26934e4fbf337b0af73a9e6f53d458a25
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Author: Andrea Claudi <aclaudi@redhat.com>
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Date: Thu May 6 12:42:06 2021 +0200
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tc: htb: improve burst error messages
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When a wrong value is provided for "burst" or "cburst" parameters, the
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resulting error message is unclear and can be misleading:
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$ tc class add dev dummy0 parent 1: classid 1:1 htb rate 100KBps burst errtrigger
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Illegal "buffer"
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The message claims an illegal "buffer" is provided, but neither the
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inline help nor the man page list "buffer" among the htb parameters, and
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the only way to know that "burst", "maxburst" and "buffer" are synonyms
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is to look into tc/q_htb.c.
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This commit tries to improve this simply changing the error string to
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the parameter name provided in the user-given command, clearly pointing
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out where the wrong value is.
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$ tc class add dev dummy0 parent 1: classid 1:1 htb rate 100KBps burst errtrigger
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Illegal "burst"
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$ tc class add dev dummy0 parent 1: classid 1:1 htb rate 100Kbps maxburst errtrigger
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Illegal "maxburst"
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Reported-by: Sebastian Mitterle <smitterl@redhat.com>
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Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
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Signed-off-by: David Ahern <dsahern@kernel.org>
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Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
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---
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tc/q_htb.c | 7 +++++--
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1 file changed, 5 insertions(+), 2 deletions(-)
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diff --git a/tc/q_htb.c b/tc/q_htb.c
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index 42566355..b5f95f67 100644
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--- a/tc/q_htb.c
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+++ b/tc/q_htb.c
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@@ -125,6 +125,7 @@ static int htb_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, str
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unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
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struct rtattr *tail;
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__u64 ceil64 = 0, rate64 = 0;
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+ char *param;
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while (argc > 0) {
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if (matches(*argv, "prio") == 0) {
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@@ -160,17 +161,19 @@ static int htb_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, str
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} else if (matches(*argv, "burst") == 0 ||
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strcmp(*argv, "buffer") == 0 ||
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strcmp(*argv, "maxburst") == 0) {
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+ param = *argv;
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NEXT_ARG();
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if (get_size_and_cell(&buffer, &cell_log, *argv) < 0) {
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- explain1("buffer");
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+ explain1(param);
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return -1;
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}
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} else if (matches(*argv, "cburst") == 0 ||
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strcmp(*argv, "cbuffer") == 0 ||
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strcmp(*argv, "cmaxburst") == 0) {
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+ param = *argv;
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NEXT_ARG();
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if (get_size_and_cell(&cbuffer, &ccell_log, *argv) < 0) {
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- explain1("cbuffer");
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+ explain1(param);
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return -1;
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}
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} else if (strcmp(*argv, "ceil") == 0) {
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--
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2.31.1
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