aboutgitcodebugslistschat
path: root/Makefile
blob: 4647210a5a9723c743cde3f13748d1c1bc3ff6ba (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
# SPDX-License-Identifier: AGPL-3.0-or-later
#
# PASST - Plug A Simple Socket Transport
#  for qemu/UNIX domain socket mode
#
# PASTA - Pack A Subtle Tap Abstraction
#  for network namespace/tap device mode
#
# Copyright (c) 2021 Red Hat GmbH
# Author: Stefano Brivio <sbrivio@redhat.com>

RLIMIT_STACK_VAL := $(shell /bin/sh -c 'ulimit -s')
ifeq ($(RLIMIT_STACK_VAL),unlimited)
RLIMIT_STACK_VAL := 1024
endif

AUDIT_ARCH := $(shell uname -m | tr [a-z] [A-Z])
AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/I[456]86/I386/')
AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/PPC64/PPC/')
AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/PPCLE/PPC64LE/')

CFLAGS += -Wall -Wextra -pedantic -std=c99 -D_XOPEN_SOURCE=700 -D_GNU_SOURCE
CFLAGS += -DPAGE_SIZE=$(shell getconf PAGE_SIZE)
CFLAGS += -DNETNS_RUN_DIR=\"/run/netns\"
CFLAGS += -DPASST_AUDIT_ARCH=AUDIT_ARCH_$(AUDIT_ARCH)
CFLAGS += -DRLIMIT_STACK_VAL=$(RLIMIT_STACK_VAL)
CFLAGS += -DARCH=\"$(shell uname -m)\"

# On gcc 11.2, with -O2 and -flto, tcp_hash() and siphash_20b(), if inlined,
# seem to be hitting something similar to:
#	https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78993
# from the pointer arithmetic used from the tcp_tap_handler() path to get the
# remote connection address.
ifeq ($(shell $(CC) -dumpversion),11)
ifneq (,$(filter -flto%,$(CFLAGS)))
ifneq (,$(filter -O2,$(CFLAGS)))
	CFLAGS += -DTCP_HASH_NOINLINE
	CFLAGS += -DSIPHASH_20B_NOINLINE
endif
endif
endif

C := \#include <linux/tcp.h>\nstruct tcp_info x = { .tcpi_snd_wnd = 0 };
ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
	CFLAGS += -DHAS_SND_WND
endif

prefix ?= /usr/local

all: passt pasta passt4netns qrap

avx2: CFLAGS += -Ofast -mavx2 -ftree-vectorize -funroll-loops
avx2: clean all

static: CFLAGS += -static -DGLIBC_NO_STATIC_NSS
static: clean all

seccomp.h: *.c $(filter-out seccomp.h,$(wildcard *.h))
	@ ./seccomp.sh

passt: $(filter-out qrap.c,$(wildcard *.c)) \
	$(filter-out qrap.h,$(wildcard *.h)) seccomp.h
	$(CC) $(CFLAGS) $(filter-out qrap.c,$(wildcard *.c)) -o passt

pasta: passt
	ln -s passt pasta
	ln -s passt.1 pasta.1

passt4netns: passt
	ln -s passt passt4netns

qrap: qrap.c passt.h
	$(CC) $(CFLAGS) \
		qrap.c -o qrap

.PHONY: clean
clean:
	-${RM} passt *.o seccomp.h qrap pasta pasta.1 passt4netns \
		passt.tar passt.tar.gz *.deb *.rpm

install: passt pasta qrap
	mkdir -p $(DESTDIR)$(prefix)/bin $(DESTDIR)$(prefix)/share/man/man1
	cp -d passt pasta qrap $(DESTDIR)$(prefix)/bin
	cp -d passt.1 pasta.1 qrap.1 $(DESTDIR)$(prefix)/share/man/man1

uninstall:
	-${RM} $(DESTDIR)$(prefix)/bin/passt
	-${RM} $(DESTDIR)$(prefix)/bin/pasta
	-${RM} $(DESTDIR)$(prefix)/bin/qrap
	-${RM} $(DESTDIR)$(prefix)/share/man/man1/passt.1
	-${RM} $(DESTDIR)$(prefix)/share/man/man1/pasta.1
	-${RM} $(DESTDIR)$(prefix)/share/man/man1/qrap.1

pkgs:
	tar cf passt.tar -P --xform 's//\/usr\/bin\//' passt pasta qrap
	tar rf passt.tar -P --xform 's//\/usr\/share\/man\/man1\//' \
		passt.1 pasta.1 qrap.1
	gzip passt.tar
	EMAIL="sbrivio@redhat.com" fakeroot alien --to-deb \
		--description="User-mode networking for VMs and namespaces" \
		-k --version=$(shell git rev-parse --short HEAD) \
		passt.tar.gz
	fakeroot alien --to-rpm --target=$(shell uname -m) \
		--description="User-mode networking for VMs and namespaces" \
		-k --version=g$(shell git rev-parse --short HEAD) passt.tar.gz

# Checkers currently disabled for clang-tidy:
# - llvmlibc-restrict-system-libc-headers
#	TODO: this is Linux-only for the moment, nice to fix eventually
#
# - bugprone-macro-parentheses
# - google-readability-braces-around-statements
# - hicpp-braces-around-statements
# - readability-braces-around-statements
#	Debatable whether that improves readability, right now it would look
#	like a mess
#
# - readability-magic-numbers
# - cppcoreguidelines-avoid-magic-numbers
#	TODO: in most cases they are justified, but probably not everywhere
#
# - clang-analyzer-valist.Uninitialized
#	TODO: enable once https://bugs.llvm.org/show_bug.cgi?id=41311 is fixed
#
# - clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling
#	Probably not doable to impement this without plain memcpy(), memset()
#
# - cppcoreguidelines-init-variables
#	Dubious value, would kill readability
#
# - hicpp-signed-bitwise
#	Those are needed for syscalls, epoll_wait flags, etc.
#
# - llvm-include-order
#	TODO: not really important, but nice to fix eventually
#
# - readability-isolate-declaration
#	Dubious value, would kill readability
#
# - android-cloexec-open
# - android-cloexec-pipe
# - android-cloexec-pipe2
# - android-cloexec-epoll-create1
#	TODO: check, fix except for the few cases where we need to share fds
#
# - bugprone-narrowing-conversions
# - cppcoreguidelines-narrowing-conversions
#	TODO: nice to fix eventually
#
# - cppcoreguidelines-avoid-non-const-global-variables
#	TODO: check, fix, and more in general constify wherever possible
#
# - bugprone-suspicious-string-compare
#	Return value of memcmp(), not really suspicious
clang-tidy: $(wildcard *.c) $(wildcard *.h)
	clang-tidy -checks=*,-modernize-*,\
	-clang-analyzer-valist.Uninitialized,\
	-cppcoreguidelines-init-variables,\
	-bugprone-macro-parentheses,\
	-google-readability-braces-around-statements,\
	-hicpp-braces-around-statements,\
	-readability-braces-around-statements,\
	-readability-magic-numbers,\
	-llvmlibc-restrict-system-libc-headers,\
	-hicpp-signed-bitwise,\
	-clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling,\
	-llvm-include-order,\
	-cppcoreguidelines-avoid-magic-numbers,\
	-readability-isolate-declaration,\
	-android-cloexec-open,-android-cloexec-pipe,-android-cloexec-pipe2,\
	-android-cloexec-epoll-create1,\
	-bugprone-narrowing-conversions,\
	-cppcoreguidelines-narrowing-conversions,\
	-cppcoreguidelines-avoid-non-const-global-variables,\
	-bugprone-suspicious-string-compare \
	--warnings-as-errors=* $(wildcard *.c) -- $(CFLAGS)

ifeq ($(shell $(CC) -v 2>&1 | grep -c "gcc version"),1)
TARGET := $(shell ${CC} -v 2>&1 | sed -n 's/Target: \(.*\)/\1/p')
VER := $(shell $(CC) -dumpversion)
EXTRA_INCLUDES := /usr/lib/gcc/$(TARGET)/$(VER)/include
EXTRA_INCLUDES_OPT := -I$(EXTRA_INCLUDES)
else
EXTRA_INCLUDES_OPT :=
endif
cppcheck: $(wildcard *.c) $(wildcard *.h)
	cppcheck --std=c99 --error-exitcode=1 --enable=all --force	\
	--inconclusive --library=posix					\
	-I/usr/include $(EXTRA_INCLUDES_OPT)				\
									\
	--suppress=syntaxError:/usr/include/stdlib.h			\
	--suppress=missingIncludeSystem					\
	--suppress="*:$(EXTRA_INCLUDES)/avx512fintrin.h"		\
	--suppress="*:$(EXTRA_INCLUDES)/xmmintrin.h"			\
	--suppress="*:$(EXTRA_INCLUDES)/emmintrin.h"			\
	--suppress="*:$(EXTRA_INCLUDES)/avxintrin.h"			\
	--suppress="*:$(EXTRA_INCLUDES)/bmiintrin.h"			\
									\
	--suppress=objectIndex:tcp.c --suppress=objectIndex:udp.c	\
	--suppress=va_list_usedBeforeStarted:util.c			\
	--suppress=unusedFunction					\
	--suppress=knownConditionTrueFalse:conf.c			\
	--suppress=strtokCalled:conf.c --suppress=strtokCalled:qrap.c	\
	--suppress=getpwnamCalled:passt.c				\
	--suppress=localtimeCalled:pcap.c				\
	--suppress=unusedStructMember:pcap.c				\
	--suppress=funcArgNamesDifferent:util.h				\
									\
	--suppress=unmatchedSuppression:conf.c				\
	--suppress=unmatchedSuppression:passt.c				\
	--suppress=unmatchedSuppression:pcap.c				\
	--suppress=unmatchedSuppression:qrap.c				\
	--suppress=unmatchedSuppression:tcp.c				\
	--suppress=unmatchedSuppression:udp.c				\
	--suppress=unmatchedSuppression:util.c				\
	--suppress=unmatchedSuppression:util.h				\
	$(filter -D%,$(CFLAGS))						\
	.