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tcpi_bytes_acked and tcpi_min_rtt are only available on recent kernel versions: provide fall-back paths (incurring some grade of performance penalty). Support for getrandom() was introduced in Linux 3.17 and glibc 2.25: provide an alternate mechanism for that as well, reading from /dev/random. Also check if NETLINK_GET_STRICT_CHK is defined before using it: it's not strictly needed, we'll filter out irrelevant results from netlink anyway. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
234 lines
8.0 KiB
Makefile
234 lines
8.0 KiB
Makefile
# SPDX-License-Identifier: AGPL-3.0-or-later
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#
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# PASST - Plug A Simple Socket Transport
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# for qemu/UNIX domain socket mode
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#
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# PASTA - Pack A Subtle Tap Abstraction
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# for network namespace/tap device mode
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#
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# Copyright (c) 2021 Red Hat GmbH
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# Author: Stefano Brivio <sbrivio@redhat.com>
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RLIMIT_STACK_VAL := $(shell /bin/sh -c 'ulimit -s')
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ifeq ($(RLIMIT_STACK_VAL),unlimited)
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RLIMIT_STACK_VAL := 1024
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endif
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AUDIT_ARCH := $(shell uname -m | tr [a-z] [A-Z])
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AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/I[456]86/I386/')
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AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/PPC64/PPC/')
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AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/PPCLE/PPC64LE/')
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CFLAGS += -Wall -Wextra -pedantic -std=c99 -D_XOPEN_SOURCE=700 -D_GNU_SOURCE
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CFLAGS += -DPAGE_SIZE=$(shell getconf PAGE_SIZE)
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CFLAGS += -DNETNS_RUN_DIR=\"/run/netns\"
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CFLAGS += -DPASST_AUDIT_ARCH=AUDIT_ARCH_$(AUDIT_ARCH)
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CFLAGS += -DRLIMIT_STACK_VAL=$(RLIMIT_STACK_VAL)
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CFLAGS += -DARCH=\"$(shell uname -m)\"
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# On gcc 11.2, with -O2 and -flto, tcp_hash() and siphash_20b(), if inlined,
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# seem to be hitting something similar to:
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78993
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# from the pointer arithmetic used from the tcp_tap_handler() path to get the
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# remote connection address.
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ifeq ($(shell $(CC) -dumpversion),11)
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ifneq (,$(filter -flto%,$(CFLAGS)))
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ifneq (,$(filter -O2,$(CFLAGS)))
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CFLAGS += -DTCP_HASH_NOINLINE
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CFLAGS += -DSIPHASH_20B_NOINLINE
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endif
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endif
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endif
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C := \#include <linux/tcp.h>\nstruct tcp_info x = { .tcpi_snd_wnd = 0 };
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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CFLAGS += -DHAS_SND_WND
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endif
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C := \#include <linux/tcp.h>\nstruct tcp_info x = { .tcpi_bytes_acked = 0 };
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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CFLAGS += -DHAS_BYTES_ACKED
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endif
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C := \#include <linux/tcp.h>\nstruct tcp_info x = { .tcpi_min_rtt = 0 };
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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CFLAGS += -DHAS_MIN_RTT
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endif
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C := \#include <sys/random.h>\nint main(){int a=getrandom(0, 0, 0);}
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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CFLAGS += -DHAS_GETRANDOM
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endif
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prefix ?= /usr/local
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all: passt pasta passt4netns qrap
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avx2: CFLAGS += -Ofast -mavx2 -ftree-vectorize -funroll-loops
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avx2: clean all
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static: CFLAGS += -static -DGLIBC_NO_STATIC_NSS
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static: clean all
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seccomp.h: *.c $(filter-out seccomp.h,$(wildcard *.h))
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@ ./seccomp.sh
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passt: $(filter-out qrap.c,$(wildcard *.c)) \
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$(filter-out qrap.h,$(wildcard *.h)) seccomp.h
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$(CC) $(CFLAGS) $(filter-out qrap.c,$(wildcard *.c)) -o passt
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pasta: passt
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ln -s passt pasta
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ln -s passt.1 pasta.1
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passt4netns: passt
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ln -s passt passt4netns
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qrap: qrap.c passt.h
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$(CC) $(CFLAGS) \
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qrap.c -o qrap
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.PHONY: clean
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clean:
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-${RM} passt *.o seccomp.h qrap pasta pasta.1 passt4netns \
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passt.tar passt.tar.gz *.deb *.rpm
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install: passt pasta qrap
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mkdir -p $(DESTDIR)$(prefix)/bin $(DESTDIR)$(prefix)/share/man/man1
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cp -d passt pasta qrap $(DESTDIR)$(prefix)/bin
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cp -d passt.1 pasta.1 qrap.1 $(DESTDIR)$(prefix)/share/man/man1
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uninstall:
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-${RM} $(DESTDIR)$(prefix)/bin/passt
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-${RM} $(DESTDIR)$(prefix)/bin/pasta
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-${RM} $(DESTDIR)$(prefix)/bin/qrap
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-${RM} $(DESTDIR)$(prefix)/share/man/man1/passt.1
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-${RM} $(DESTDIR)$(prefix)/share/man/man1/pasta.1
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-${RM} $(DESTDIR)$(prefix)/share/man/man1/qrap.1
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pkgs:
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tar cf passt.tar -P --xform 's//\/usr\/bin\//' passt pasta qrap
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tar rf passt.tar -P --xform 's//\/usr\/share\/man\/man1\//' \
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passt.1 pasta.1 qrap.1
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gzip passt.tar
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EMAIL="sbrivio@redhat.com" fakeroot alien --to-deb \
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--description="User-mode networking for VMs and namespaces" \
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-k --version=$(shell git rev-parse --short HEAD) \
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passt.tar.gz
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fakeroot alien --to-rpm --target=$(shell uname -m) \
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--description="User-mode networking for VMs and namespaces" \
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-k --version=g$(shell git rev-parse --short HEAD) passt.tar.gz
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# Checkers currently disabled for clang-tidy:
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# - llvmlibc-restrict-system-libc-headers
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# TODO: this is Linux-only for the moment, nice to fix eventually
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#
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# - bugprone-macro-parentheses
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# - google-readability-braces-around-statements
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# - hicpp-braces-around-statements
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# - readability-braces-around-statements
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# Debatable whether that improves readability, right now it would look
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# like a mess
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#
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# - readability-magic-numbers
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# - cppcoreguidelines-avoid-magic-numbers
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# TODO: in most cases they are justified, but probably not everywhere
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#
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# - clang-analyzer-valist.Uninitialized
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# TODO: enable once https://bugs.llvm.org/show_bug.cgi?id=41311 is fixed
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#
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# - clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling
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# Probably not doable to impement this without plain memcpy(), memset()
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#
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# - cppcoreguidelines-init-variables
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# Dubious value, would kill readability
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#
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# - hicpp-signed-bitwise
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# Those are needed for syscalls, epoll_wait flags, etc.
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#
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# - llvm-include-order
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# TODO: not really important, but nice to fix eventually
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#
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# - readability-isolate-declaration
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# Dubious value, would kill readability
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#
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# - android-cloexec-open
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# - android-cloexec-pipe
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# - android-cloexec-pipe2
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# - android-cloexec-epoll-create1
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# TODO: check, fix except for the few cases where we need to share fds
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#
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# - bugprone-narrowing-conversions
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# - cppcoreguidelines-narrowing-conversions
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# TODO: nice to fix eventually
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#
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# - cppcoreguidelines-avoid-non-const-global-variables
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# TODO: check, fix, and more in general constify wherever possible
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#
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# - bugprone-suspicious-string-compare
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# Return value of memcmp(), not really suspicious
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clang-tidy: $(wildcard *.c) $(wildcard *.h)
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clang-tidy -checks=*,-modernize-*,\
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-clang-analyzer-valist.Uninitialized,\
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-cppcoreguidelines-init-variables,\
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-bugprone-macro-parentheses,\
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-google-readability-braces-around-statements,\
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-hicpp-braces-around-statements,\
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-readability-braces-around-statements,\
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-readability-magic-numbers,\
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-llvmlibc-restrict-system-libc-headers,\
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-hicpp-signed-bitwise,\
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-clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling,\
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-llvm-include-order,\
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-cppcoreguidelines-avoid-magic-numbers,\
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-readability-isolate-declaration,\
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-android-cloexec-open,-android-cloexec-pipe,-android-cloexec-pipe2,\
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-android-cloexec-epoll-create1,\
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-bugprone-narrowing-conversions,\
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-cppcoreguidelines-narrowing-conversions,\
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-cppcoreguidelines-avoid-non-const-global-variables,\
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-bugprone-suspicious-string-compare \
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--warnings-as-errors=* $(wildcard *.c) -- $(CFLAGS)
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ifeq ($(shell $(CC) -v 2>&1 | grep -c "gcc version"),1)
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TARGET := $(shell ${CC} -v 2>&1 | sed -n 's/Target: \(.*\)/\1/p')
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VER := $(shell $(CC) -dumpversion)
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EXTRA_INCLUDES := /usr/lib/gcc/$(TARGET)/$(VER)/include
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EXTRA_INCLUDES_OPT := -I$(EXTRA_INCLUDES)
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else
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EXTRA_INCLUDES_OPT :=
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endif
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cppcheck: $(wildcard *.c) $(wildcard *.h)
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cppcheck --std=c99 --error-exitcode=1 --enable=all --force \
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--inconclusive --library=posix \
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-I/usr/include $(EXTRA_INCLUDES_OPT) \
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\
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--suppress=syntaxError:/usr/include/stdlib.h \
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--suppress=missingIncludeSystem \
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--suppress="*:$(EXTRA_INCLUDES)/avx512fintrin.h" \
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--suppress="*:$(EXTRA_INCLUDES)/xmmintrin.h" \
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--suppress="*:$(EXTRA_INCLUDES)/emmintrin.h" \
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--suppress="*:$(EXTRA_INCLUDES)/avxintrin.h" \
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--suppress="*:$(EXTRA_INCLUDES)/bmiintrin.h" \
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\
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--suppress=objectIndex:tcp.c --suppress=objectIndex:udp.c \
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--suppress=va_list_usedBeforeStarted:util.c \
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--suppress=unusedFunction \
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--suppress=knownConditionTrueFalse:conf.c \
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--suppress=strtokCalled:conf.c --suppress=strtokCalled:qrap.c \
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--suppress=getpwnamCalled:passt.c \
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--suppress=localtimeCalled:pcap.c \
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--suppress=unusedStructMember:pcap.c \
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--suppress=funcArgNamesDifferent:util.h \
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\
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--suppress=unmatchedSuppression:conf.c \
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--suppress=unmatchedSuppression:passt.c \
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--suppress=unmatchedSuppression:pcap.c \
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--suppress=unmatchedSuppression:qrap.c \
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--suppress=unmatchedSuppression:tcp.c \
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--suppress=unmatchedSuppression:udp.c \
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--suppress=unmatchedSuppression:util.c \
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--suppress=unmatchedSuppression:util.h \
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$(filter -D%,$(CFLAGS)) \
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.
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