From c865c52365f477eeb7286b3387d18184bfbf08c6 Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Tue, 30 Apr 2019 18:53:57 +0200 Subject: [PATCH] tc: add support for plug qdisc sch_plug can be used to perform functional qdisc unit tests controlling explicitly the queuing behaviour from user-space. Plug support lacks since its introduction in 2012. This change introduces basic support, to control the tc status. v1 -> v2: - use the SPDX identifier Signed-off-by: Paolo Abeni Signed-off-by: David Ahern --- tc/Makefile | 1 + tc/q_plug.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 77 insertions(+) create mode 100644 tc/q_plug.c diff --git a/tc/Makefile b/tc/Makefile index 2edaf2c8..1a305cf4 100644 --- a/tc/Makefile +++ b/tc/Makefile @@ -75,6 +75,7 @@ TCMODULES += f_matchall.o TCMODULES += q_cbs.o TCMODULES += q_etf.o TCMODULES += q_taprio.o +TCMODULES += q_plug.o TCSO := ifeq ($(TC_CONFIG_ATM),y) diff --git a/tc/q_plug.c b/tc/q_plug.c new file mode 100644 index 00000000..2c1c1a0b --- /dev/null +++ b/tc/q_plug.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * q_log.c plug scheduler + * + * Copyright (C) 2019 Paolo Abeni + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "utils.h" +#include "tc_util.h" + +static void explain(void) +{ + fprintf(stderr, "Usage: ... plug [block | release | release_indefinite | limit NUMBER]\n"); +} + +static int plug_parse_opt(struct qdisc_util *qu, int argc, char **argv, + struct nlmsghdr *n, const char *dev) +{ + struct tc_plug_qopt opt = {}; + int ok = 0; + + while (argc > 0) { + if (strcmp(*argv, "block") == 0) { + opt.action = TCQ_PLUG_BUFFER; + ok++; + } else if (strcmp(*argv, "release") == 0) { + opt.action = TCQ_PLUG_RELEASE_ONE; + ok++; + } else if (strcmp(*argv, "release_indefinite") == 0) { + opt.action = TCQ_PLUG_RELEASE_INDEFINITE; + ok++; + } else if (strcmp(*argv, "limit") == 0) { + opt.action = TCQ_PLUG_LIMIT; + NEXT_ARG(); + if (get_size(&opt.limit, *argv)) { + fprintf(stderr, "Illegal value for \"limit\": \"%s\"\n", *argv); + return -1; + } + ok++; + } else if (strcmp(*argv, "help") == 0) { + explain(); + return -1; + } else { + fprintf(stderr, "%s: unknown parameter \"%s\"\n", qu->id, *argv); + explain(); + return -1; + } + argc--; argv++; + } + + if (ok) + addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt)); + return 0; +} + +static int plug_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) +{ + /* dummy implementation as sch_plug does not implement a dump op */ + return 0; +} + + +struct qdisc_util plug_qdisc_util = { + .id = "plug", + .parse_qopt = plug_parse_opt, + .print_qopt = plug_print_opt, +}; -- 2.39.5