Merge branch 'tools-ynl-turn-the-page-pool-sample-into-a-real-tool'

Jakub Kicinski says:

====================
tools: ynl: turn the page-pool sample into a real tool

The page-pool YNL sample is quite useful. It's helps calculate
recycling rate and memory consumption. Since we still haven't
figured out a way to integrate with iproute2 (not for the lack
of thinking how to solve it) - create a ynltool command in ynl.

Add page-pool and qstats support.

Most commands can use the Python YNL CLI directly but low level
stats often need aggregation or some math on top to be useful.
Specifically in this patch set:
 - page pool stats are aggregated and recycling rate computed
 - per-queue stats are used to compute traffic balance across queues

v1: https://lore.kernel.org/[email protected]
====================

Link: https://patch.msgid.link/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>

Author: Paolo Abeni

tools/net/ynl/Makefile

@@ -12,10 +12,11 @@ endif
 libdir  ?= $(prefix)/$(libdir_relative)
 includedir ?= $(prefix)/include
 
-SUBDIRS = lib generated samples
+SUBDIRS = lib generated samples ynltool
 
 all: $(SUBDIRS) libynl.a
 
+ynltool: | lib generated libynl.a
 samples: | lib generated
 libynl.a: | lib generated
 	@echo -e "\tAR $@"

tools/net/ynl/samples/page-pool.c

@@ -0,0 +1 @@
+ynltool

tools/net/ynl/ynltool/.gitignore

@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+include ../Makefile.deps
+
+INSTALL	?= install
+prefix  ?= /usr
+
+CC := gcc
+CFLAGS := -Wall -Wextra -Werror -O2
+ifeq ("$(DEBUG)","1")
+  CFLAGS += -g -fsanitize=address -fsanitize=leak -static-libasan
+endif
+CFLAGS += -I../lib -I../generated -I../../../include/uapi/
+
+SRC_VERSION := \
+	$(shell make --no-print-directory -sC ../../../.. kernelversion || \
+		echo "unknown")
+
+CFLAGS += -DSRC_VERSION='"$(SRC_VERSION)"'
+
+SRCS := $(wildcard *.c)
+OBJS := $(patsubst %.c,$(OUTPUT)%.o,$(SRCS))
+
+YNLTOOL := $(OUTPUT)ynltool
+
+include $(wildcard *.d)
+
+all: $(YNLTOOL)
+
+Q = @
+
+$(YNLTOOL): ../libynl.a $(OBJS)
+	$(Q)echo -e "\tLINK $@"
+	$(Q)$(CC) $(CFLAGS) -o $@ $(OBJS) ../libynl.a -lmnl -lm
+
+%.o: %.c ../libynl.a
+	$(Q)echo -e "\tCC $@"
+	$(Q)$(COMPILE.c) -MMD -c -o $@ $<
+
+../libynl.a:
+	$(Q)$(MAKE) -C ../
+
+clean:
+	rm -f *.o *.d *~
+
+distclean: clean
+	rm -f $(YNLTOOL)
+
+bindir ?= /usr/bin
+
+install: $(YNLTOOL)
+	install -m 0755 $(YNLTOOL) $(DESTDIR)$(bindir)/$(YNLTOOL)
+
+.PHONY: all clean distclean
+.DEFAULT_GOAL=all