[Buildroot] [PATCH v3] package/criu: new package

[Marcus Folkesson <marcus.folkesson@gmail.com>]

Checkpoint/Restore In Userspace (CRIU), is a software tool for the
Linux operating system to make it possible to freeze a running
application and checkpoint it to persistent storage as a collection of files.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---

Notes:
    v2:
     - Addressed comments from Thomas.
     - Tested on ARM target and on x86_64 with qemu.
    
    v3:
     - set CONFIG_CHECKPOINT_RESTORE in kernel config
     - Only be available for ARMv6, ARMv7 and ARMv8

 DEVELOPERS             |  1 +
 package/Config.in      |  1 +
 package/criu/Config.in | 48 ++++++++++++++++++++++++++++++++++
 package/criu/criu.hash |  3 +++
 package/criu/criu.mk   | 59 ++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 112 insertions(+)
 create mode 100644 package/criu/Config.in
 create mode 100644 package/criu/criu.hash
 create mode 100644 package/criu/criu.mk

diff --git a/DEVELOPERS b/DEVELOPERS
index 7fae4841e4..d6e6a98202 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -1986,6 +1986,7 @@ F:	support/testing/tests/package/test_python_pytest.py
 F:	support/testing/tests/package/test_python_pytest_asyncio.py
 
 N:	Marcus Folkesson <marcus.folkesson@gmail.com>
+F:	package/criu/
 F:	package/libcamera/
 F:	package/libcamera-apps/
 F:	package/libostree/
diff --git a/package/Config.in b/package/Config.in
index e8dbadadf3..9a754cb072 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -2667,6 +2667,7 @@ menu "System tools"
 	source "package/coreutils/Config.in"
 	source "package/cpulimit/Config.in"
 	source "package/cpuload/Config.in"
+	source "package/criu/Config.in"
 	source "package/crun/Config.in"
 	source "package/daemon/Config.in"
 	source "package/dc3dd/Config.in"
diff --git a/package/criu/Config.in b/package/criu/Config.in
new file mode 100644
index 0000000000..06e809fb83
--- /dev/null
+++ b/package/criu/Config.in
@@ -0,0 +1,48 @@
+# criu only builds on certain architectures
+config BR2_PACKAGE_CRIU_ARCH_SUPPORTS
+	bool
+	default y if BR2_ARM_CPU_ARMV6
+	default y if BR2_ARM_CPU_ARMV7A
+	default y if BR2_ARM_CPU_ARMV7M
+	default y if BR2_ARM_CPU_ARMV8A
+	default y if BR2_ARM_CPU_ARMV8M
+	default y if BR2_aarch64
+	default y if BR2_i386
+	default y if BR2_mips
+	default y if BR2_x86_64
+	default y if BR2_powerpc64
+	default y if BR2_s390x
+
+menuconfig BR2_PACKAGE_CRIU
+	bool "criu"
+	depends on BR2_PACKAGE_CRIU_ARCH_SUPPORTS
+	depends on BR2_PACKAGE_HOST_PYTHON3 # host-python3-ssl
+	depends on BR2_PACKAGE_HOST_PROTOBUF_ARCH_SUPPORTS # protobuf-c
+	depends on BR2_PACKAGE_PROTOBUF_ARCH_SUPPORTS
+	depends on BR2_PACKAGE_LIBBSD_ARCH_SUPPORTS
+	depends on BR2_INSTALL_LIBSTDCPP # protobuf
+	depends on BR2_TOOLCHAIN_HAS_THREADS # protobuf, libnl
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # protobuf
+	depends on !BR2_STATIC_LIBS # protobuf, libbsd
+	depends on BR2_USE_WCHAR # libbsd
+	depends on BR2_USE_MMU # libcap
+	select BR2_PACKAGE_HOST_PYTHON3_SSL
+	select BR2_PACKAGE_PROTOBUF
+	select BR2_PACKAGE_PROTOBUF_C
+	select BR2_PACKAGE_LIBAIO
+	select BR2_PACKAGE_LIBBSD
+	select BR2_PACKAGE_LIBCAP
+	select BR2_PACKAGE_LIBNET
+	select BR2_PACKAGE_LIBNL
+	select BR2_PACKAGE_PYTHON3
+	help
+	  Checkpoint/Restore In Userspace (CRIU), is a software
+	  tool for the Linux operating system to make it possible
+	  to freeze a running application and checkpoint it to
+	  persistent storage as a collection of files.
+
+	  https://criu.org/Main_Page
+
+comment "criu needs a toolchain w/ threads, dynamic library, wchar"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS \
+		|| !BR2_USE_WCHAR
diff --git a/package/criu/criu.hash b/package/criu/criu.hash
new file mode 100644
index 0000000000..2c4a07252b
--- /dev/null
+++ b/package/criu/criu.hash
@@ -0,0 +1,3 @@
+# Locally calculated
+sha256  6a9997981c9fe4730c848ce59346b3a22fad69b803607cb67a3f6ec0557fa474  criu-3.18.tar.gz
+sha256  568a1fa9d90e18a1a1a61ea58ec2eece16b56a5042cc72c1b4f8d4455ae6fcb7  COPYING
diff --git a/package/criu/criu.mk b/package/criu/criu.mk
new file mode 100644
index 0000000000..3da7ec90ab
--- /dev/null
+++ b/package/criu/criu.mk
@@ -0,0 +1,59 @@
+################################################################################
+#
+# CRIU
+#
+################################################################################
+
+CRIU_VERSION = 3.18
+CRIU_SOURCE = criu-$(CRIU_VERSION).tar.gz
+CRIU_SITE = https://github.com/checkpoint-restore/criu/archive/refs/tags/v$(CRIU_VERSION)
+
+CRIU_LICENSE = GPL-2.0
+CRIU_LICENSE_FILES = COPYING
+CRIU_DEPENDENCIES =\
+	host-pkgconf \
+	host-protobuf-c \
+	host-python3 \
+	host-python-pip \
+	libaio \
+	libbsd \
+	libcap \
+	libnet \
+	libnl \
+	protobuf \
+	protobuf-c \
+	python3
+
+CRIU_MAKE_ENV =\
+	$(TARGET_MAKE_ENV) \
+	$(TARGET_CONFIGURE_OPTS) \
+	CROSS_COMPILE=$(TARGET_CROSS) \
+	WERROR=0
+
+#x86_64 is treated as x86 in criu
+#Also, powerpc64 is refered to as ppc64 in criu.
+ifeq ($(BR2_ARCH),"x86_64")
+CRIU_MAKE_ENV += ARCH=x86
+else ifeq ($(BR2_ARCH),"powerpc64")
+CRIU_MAKE_ENV += ARCH=ppc64
+else
+CRIU_MAKE_ENV += ARCH=$(BR2_ARCH)
+endif
+
+ # Criu needs Kernel Checkpoint/restore support which is not enabled
+ # by default.
+ define CRIU_LINUX_CONFIG_FIXUPS
+		 $(call KCONFIG_ENABLE_OPT,CONFIG_CHECKPOINT_RESTORE)
+ endef
+
+define CRIU_BUILD_CMDS
+	rm -rf $(@D)/images/google/protobuf/descriptor.proto
+	ln -s  $(STAGING_DIR)/usr/include/google/protobuf/descriptor.proto $(@D)/images/google/protobuf/descriptor.proto
+	$(CRIU_MAKE_ENV) $(MAKE) USERCFLAGS="$(TARGET_CFLAGS)" -C $(@D)
+endef
+
+define CRIU_INSTALL_TARGET_CMDS
+	$(CRIU_MAKE_ENV) $(MAKE) DESTDIR=$(TARGET_DIR) PREFIX=/usr -C $(@D) install-criu install-lib install-compel
+endef
+
+$(eval $(generic-package))
-- 
2.41.0

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