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Date: Mon, 05 Jun 2023 05:31:52 -0400
From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
To: Jakub Kicinski <kuba@...nel.org>, 
 davem@...emloft.net
Cc: netdev@...r.kernel.org, 
 edumazet@...gle.com, 
 pabeni@...hat.com, 
 simon.horman@...igine.com, 
 Jakub Kicinski <kuba@...nel.org>
Subject: RE: [PATCH net-next v2 4/4] tools: ynl: add sample for netdev

Jakub Kicinski wrote:
> Add a sample application using the C library.
> My main goal is to make writing selftests easier but until
> I have some of those ready I think it's useful to show off
> the functionality and let people poke and tinker.
> 
> Sample outputs - dump:
> 
> $ ./netdev
> Select ifc ($ifindex; or 0 = dump; or -2 ntf check): 0
>       lo[1]	0:
>   enp1s0[2]	23: basic redirect rx-sg
> 
> Notifications (watching veth pair getting added and deleted):
> 
> $ ./netdev
> Select ifc ($ifindex; or 0 = dump; or -2 ntf check): -2
> [53]	0: (ntf: dev-add-ntf)
> [54]	0: (ntf: dev-add-ntf)
> [54]	23: basic redirect rx-sg (ntf: dev-change-ntf)
> [53]	23: basic redirect rx-sg (ntf: dev-change-ntf)
> [53]	23: basic redirect rx-sg (ntf: dev-del-ntf)
> [54]	23: basic redirect rx-sg (ntf: dev-del-ntf)
> 
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>
> ---
>  tools/net/ynl/samples/.gitignore |   1 +
>  tools/net/ynl/samples/Makefile   |  28 ++++++++
>  tools/net/ynl/samples/netdev.c   | 108 +++++++++++++++++++++++++++++++
>  3 files changed, 137 insertions(+)
>  create mode 100644 tools/net/ynl/samples/.gitignore
>  create mode 100644 tools/net/ynl/samples/Makefile
>  create mode 100644 tools/net/ynl/samples/netdev.c
> 
> diff --git a/tools/net/ynl/samples/.gitignore b/tools/net/ynl/samples/.gitignore
> new file mode 100644
> index 000000000000..7b1f5179cb54
> --- /dev/null
> +++ b/tools/net/ynl/samples/.gitignore
> @@ -0,0 +1 @@
> +netdev
> diff --git a/tools/net/ynl/samples/Makefile b/tools/net/ynl/samples/Makefile
> new file mode 100644
> index 000000000000..54eb5e3b9ab4
> --- /dev/null
> +++ b/tools/net/ynl/samples/Makefile
> @@ -0,0 +1,28 @@
> +# SPDX-License-Identifier: GPL-2.0
> +
> +CC=gcc
> +CFLAGS=-std=gnu99 -O2 -W -Wall -Wextra -Wno-unused-parameter -Wshadow \
> +	-I../lib/ -I../generated/

Should new userspace code also use gnu11?

> +ifeq ("$(DEBUG)","1")
> +  CFLAGS += -g -fsanitize=address -fsanitize=leak -static-libasan
> +endif
> +
> +LDLIBS=-lmnl ../lib/ynl.a ../generated/protos.a
> +
> +SRCS=$(wildcard *.c)
> +BINS=$(patsubst %.c,%,${SRCS})
> +
> +include $(wildcard *.d)
> +
> +all: $(BINS)
> +
> +$(BINS): ../lib/ynl.a ../generated/protos.a
> +
> +clean:
> +	rm -f *.o *.d *~
> +
> +hardclean: clean
> +	rm -f $(BINS)
> +
> +.PHONY: all clean
> +.DEFAULT_GOAL=all

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