125c5e52a5
We have several possible ways of communicating with other entities. We use sockets to communicate with the host and other network sites, but also in a different context to communicate "spliced" channels to a namespace. We also use a tuntap device or a qemu socket to communicate with the namespace or guest. For the time being these are just defined implicitly by how we structure things. However, there are other communication channels we want to use in future (e.g. virtio-user), and we want to allow more flexible forwarding between those. To accomplish that we're going to want a specific way of referring to those channels. Introduce the concept of a "passt/pasta interface" or "pif" representing a specific channel to communicate network data. Each pif is assumed to be associated with a specific network namespace in the broad sense (that is as a place where IP addresses have a consistent meaning - not the Linux specific sense). But there could be multiple pifs communicating with the same namespace (e.g. the spliced and tap interfaces in pasta). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
302 lines
11 KiB
Makefile
302 lines
11 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-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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VERSION ?= $(shell git describe --tags HEAD 2>/dev/null || echo "unknown\ version")
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# Does the target platform allow IPv4 connections to be handled via
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# the IPv6 socket API? (Linux does)
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DUAL_STACK_SOCKETS := 1
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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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TARGET ?= $(shell $(CC) -dumpmachine)
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# Get 'uname -m'-like architecture description for target
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TARGET_ARCH := $(shell echo $(TARGET) | cut -f1 -d- | tr [A-Z] [a-z])
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TARGET_ARCH := $(shell echo $(TARGET_ARCH) | sed 's/powerpc/ppc/')
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AUDIT_ARCH := $(shell echo $(TARGET_ARCH) | tr [a-z] [A-Z] | sed 's/^ARM.*/ARM/')
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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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AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/MIPS64EL/MIPSEL64/')
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AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/HPPA/PARISC/')
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AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/SH4/SH/')
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FLAGS := -Wall -Wextra -pedantic -std=c11 -D_XOPEN_SOURCE=700 -D_GNU_SOURCE
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FLAGS += -D_FORTIFY_SOURCE=2 -O2 -pie -fPIE
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FLAGS += -DPAGE_SIZE=$(shell getconf PAGE_SIZE)
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FLAGS += -DNETNS_RUN_DIR=\"/run/netns\"
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FLAGS += -DPASST_AUDIT_ARCH=AUDIT_ARCH_$(AUDIT_ARCH)
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FLAGS += -DRLIMIT_STACK_VAL=$(RLIMIT_STACK_VAL)
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FLAGS += -DARCH=\"$(TARGET_ARCH)\"
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FLAGS += -DVERSION=\"$(VERSION)\"
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FLAGS += -DDUAL_STACK_SOCKETS=$(DUAL_STACK_SOCKETS)
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PASST_SRCS = arch.c arp.c checksum.c conf.c dhcp.c dhcpv6.c icmp.c igmp.c \
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isolation.c lineread.c log.c mld.c ndp.c netlink.c packet.c passt.c \
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pasta.c pcap.c port_fwd.c tap.c tcp.c tcp_splice.c udp.c util.c
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QRAP_SRCS = qrap.c
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SRCS = $(PASST_SRCS) $(QRAP_SRCS)
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MANPAGES = passt.1 pasta.1 qrap.1
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PASST_HEADERS = arch.h arp.h checksum.h conf.h dhcp.h dhcpv6.h icmp.h \
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inany.h isolation.h lineread.h log.h ndp.h netlink.h packet.h passt.h \
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pasta.h pcap.h pif.h port_fwd.h siphash.h tap.h tcp.h tcp_conn.h \
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tcp_splice.h udp.h util.h
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HEADERS = $(PASST_HEADERS) seccomp.h
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C := \#include <linux/tcp.h>\nstruct tcp_info x = { .tcpi_snd_wnd = 0 };
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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FLAGS += -DHAS_SND_WND
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endif
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C := \#include <linux/tcp.h>\nstruct tcp_info x = { .tcpi_bytes_acked = 0 };
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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FLAGS += -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 $$?),0)
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FLAGS += -DHAS_MIN_RTT
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endif
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C := \#include <sys/random.h>\nint main(){int a=getrandom(0, 0, 0);}
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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FLAGS += -DHAS_GETRANDOM
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endif
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ifeq ($(shell :|$(CC) -fstack-protector-strong -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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FLAGS += -fstack-protector-strong
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endif
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C := \#define _GNU_SOURCE\n\#include <fcntl.h>\nint x = FALLOC_FL_COLLAPSE_RANGE;
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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EXTRA_SYSCALLS += fallocate
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endif
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prefix ?= /usr/local
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exec_prefix ?= $(prefix)
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bindir ?= $(exec_prefix)/bin
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datarootdir ?= $(prefix)/share
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docdir ?= $(datarootdir)/doc/passt
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mandir ?= $(datarootdir)/man
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man1dir ?= $(mandir)/man1
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ifeq ($(TARGET_ARCH),x86_64)
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BIN := passt passt.avx2 pasta pasta.avx2 qrap
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else
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BIN := passt pasta qrap
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endif
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all: $(BIN) $(MANPAGES) docs
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static: FLAGS += -static -DGLIBC_NO_STATIC_NSS
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static: clean all
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seccomp.h: seccomp.sh $(PASST_SRCS) $(PASST_HEADERS)
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@ EXTRA_SYSCALLS="$(EXTRA_SYSCALLS)" ARCH="$(TARGET_ARCH)" CC="$(CC)" ./seccomp.sh $(PASST_SRCS) $(PASST_HEADERS)
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passt: $(PASST_SRCS) $(HEADERS)
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$(CC) $(FLAGS) $(CFLAGS) $(CPPFLAGS) $(PASST_SRCS) -o passt $(LDFLAGS)
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passt.avx2: FLAGS += -Ofast -mavx2 -ftree-vectorize -funroll-loops
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passt.avx2: $(PASST_SRCS) $(HEADERS)
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$(CC) $(filter-out -O2,$(FLAGS)) $(CFLAGS) $(CPPFLAGS) \
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$(PASST_SRCS) -o passt.avx2 $(LDFLAGS)
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passt.avx2: passt
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pasta.avx2 pasta.1 pasta: pasta%: passt%
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ln -sf $< $@
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qrap: $(QRAP_SRCS) passt.h
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$(CC) $(FLAGS) $(CFLAGS) $(CPPFLAGS) $(QRAP_SRCS) -o qrap $(LDFLAGS)
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valgrind: EXTRA_SYSCALLS += rt_sigprocmask rt_sigtimedwait rt_sigaction \
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getpid gettid kill clock_gettime mmap \
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munmap open unlink gettimeofday futex
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valgrind: FLAGS:=-g -O0 $(filter-out -O%,$(FLAGS))
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valgrind: all
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.PHONY: clean
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clean:
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$(RM) $(BIN) *~ *.o seccomp.h pasta.1 \
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passt.tar passt.tar.gz *.deb *.rpm \
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passt.pid README.plain.md
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install: $(BIN) $(MANPAGES) docs
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mkdir -p $(DESTDIR)$(bindir) $(DESTDIR)$(man1dir)
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cp -d $(BIN) $(DESTDIR)$(bindir)
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cp -d $(MANPAGES) $(DESTDIR)$(man1dir)
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mkdir -p $(DESTDIR)$(docdir)
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cp -d README.plain.md $(DESTDIR)$(docdir)/README.md
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cp -d doc/demo.sh $(DESTDIR)$(docdir)
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uninstall:
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$(RM) $(BIN:%=$(DESTDIR)$(prefix)/bin/%)
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$(RM) $(MANPAGES:%=$(DESTDIR)$(man1dir)/%)
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$(RM) $(DESTDIR)$(docdir)/README.md
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$(RM) $(DESTDIR)$(docdir)/demo.sh
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-rmdir $(DESTDIR)$(docdir)
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pkgs: static
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tar cf passt.tar -P --xform 's//\/usr\/bin\//' $(BIN)
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tar rf passt.tar -P --xform 's//\/usr\/share\/man\/man1\//' \
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$(MANPAGES)
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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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# TODO: This hack makes a "plain" Markdown version of README.md that can be
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# reasonably shipped as documentation file, while the current README.md is
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# definitely intended for web browser consumption. It should probably work the
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# other way around: the web version should be obtained by adding HTML and
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# JavaScript portions to a plain Markdown, instead. However, cgit needs to use
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# a file in the git tree. Find a better way around this.
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docs: README.md
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@( \
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skip=0; \
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while read l; do \
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case $$l in \
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"## Demo") exit 0 ;; \
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"<!"*) ;; \
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"</"*) skip=1 ;; \
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"<"*) skip=2 ;; \
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esac; \
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\
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[ $$skip -eq 0 ] && echo "$$l"; \
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[ $$skip -eq 1 ] && skip=0; \
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done < README.md; \
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) > README.plain.md
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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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# - 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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# - altera-unroll-loops
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# - altera-id-dependent-backward-branch
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# TODO: check paths where it might make sense to improve performance
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#
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# - bugprone-easily-swappable-parameters
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# Not much can be done about them other than being careful
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#
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# - readability-function-cognitive-complexity
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# TODO: split reported functions
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#
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# - altera-struct-pack-align
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# "Poor" alignment needed for structs reflecting message formats/headers
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#
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# - concurrency-mt-unsafe
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# TODO: check again if multithreading is implemented
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#
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# - readability-identifier-length
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# Complains about any identifier <3 characters, reasonable for
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# globals, pointlessly verbose for locals and parameters.
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#
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# - bugprone-assignment-in-if-condition
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# Dubious value over the compiler's built-in warning. Would
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# increase verbosity.
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clang-tidy: $(SRCS) $(HEADERS)
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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-assignment-in-if-condition,\
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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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-bugprone-narrowing-conversions,\
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-cppcoreguidelines-narrowing-conversions,\
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-cppcoreguidelines-avoid-non-const-global-variables,\
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-altera-unroll-loops,-altera-id-dependent-backward-branch,\
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-bugprone-easily-swappable-parameters,\
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-readability-function-cognitive-complexity,\
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-altera-struct-pack-align,\
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-concurrency-mt-unsafe,\
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-readability-identifier-length \
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-config='{CheckOptions: [{key: bugprone-suspicious-string-compare.WarnOnImplicitComparison, value: "false"}]}' \
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--warnings-as-errors=* $(SRCS) -- $(filter-out -pie,$(FLAGS) $(CFLAGS) $(CPPFLAGS)) -DCLANG_TIDY_58992
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CPPCHECK_EXHAUSTIVE :=
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ifeq ($(shell cppcheck --check-level=exhaustive /dev/null > /dev/null 2>&1; echo $$?),0)
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CPPCHECK_EXHAUSTIVE += --check-level=exhaustive
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endif
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SYSTEM_INCLUDES := /usr/include $(wildcard /usr/include/$(TARGET))
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ifeq ($(shell $(CC) -v 2>&1 | grep -c "gcc version"),1)
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VER := $(shell $(CC) -dumpversion)
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SYSTEM_INCLUDES += /usr/lib/gcc/$(TARGET)/$(VER)/include
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endif
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cppcheck: $(SRCS) $(HEADERS)
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cppcheck --std=c11 --error-exitcode=1 --enable=all --force \
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--inconclusive --library=posix --quiet \
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$(CPPCHECK_EXHAUSTIVE) \
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$(SYSTEM_INCLUDES:%=-I%) \
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$(SYSTEM_INCLUDES:%=--config-exclude=%) \
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$(SYSTEM_INCLUDES:%=--suppress=*:%/*) \
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$(SYSTEM_INCLUDES:%=--suppress=unmatchedSuppression:%/*) \
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--inline-suppr \
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--suppress=unusedStructMember \
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$(filter -D%,$(FLAGS) $(CFLAGS) $(CPPFLAGS)) \
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.
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