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fs/cpio: new option to use dracut tool
Adds an option to invoke the dracut host tool, providing a configuration file, instead of having a full cpio archive of the whole target directory. A default configuration file is provided. It assumes busybox init. ideally, a different default should be used in case of systemd init, but that's left for future work. Signed-off-by: Thierry Bultel <thierry.bultel@linatsea.fr> [arnout@mind.be: many changes] Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> [yann.morin.1998@free.fr: some additional fixups] Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commit is contained in:
Thierry Bultel
Yann E. MORIN
parent
87f4900826
commit
d8f0ec7a46
@ -7,6 +7,41 @@ config BR2_TARGET_ROOTFS_CPIO
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if BR2_TARGET_ROOTFS_CPIO
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choice
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prompt "cpio type"
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default BR2_TARGET_ROOTFS_CPIO_FULL
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config BR2_TARGET_ROOTFS_CPIO_FULL
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bool "cpio the whole root filesystem"
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help
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Build a cpio archive containing the whole the root filesystem.
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config BR2_TARGET_ROOTFS_CPIO_DRACUT
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bool "Invoke dracut to make a partial initramfs"
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select BR2_PACKAGE_HOST_DRACUT
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help
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Build an additional initramfs using dracut. This only contains
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a subset of the rootfs, as determined by the configuration
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file.
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This can be useful to create a recovery system, for instance.
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endchoice
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if BR2_TARGET_ROOTFS_CPIO_DRACUT
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config BR2_TARGET_ROOTFS_CPIO_DRACUT_CONF_FILE
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string "dracut configuration file"
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default "fs/cpio/dracut.conf"
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help
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Dracut configuration file. It determines which parts of the
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rootfs get included in the cpio image. See dracut.conf(5) or
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https://github.com/dracutdevs/dracut/blob/master/man/dracut.conf.5.asc
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The default configuration file is suitable for busybox init.
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It doesn't, however, pivot_root into a full rootfs.
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endif
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choice
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prompt "Compression method"
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default BR2_TARGET_ROOTFS_CPIO_NONE
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@ -36,6 +36,8 @@ ROOTFS_CPIO_DEPENDENCIES += host-cpio
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ROOTFS_CPIO_OPTS += --reproducible
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endif
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ifeq ($(BR2_TARGET_ROOTFS_CPIO_FULL),y)
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define ROOTFS_CPIO_CMD
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cd $(TARGET_DIR) && \
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find . \
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@ -44,6 +46,37 @@ define ROOTFS_CPIO_CMD
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> $@
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endef
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else ifeq ($(BR2_TARGET_ROOTFS_CPIO_DRACUT),y)
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ROOTFS_CPIO_DEPENDENCIES += host-dracut
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ROOTFS_CPIO_DRACUT_CONF_FILE = $(call qstrip,$(BR2_TARGET_ROOTFS_CPIO_DRACUT_CONF_FILE))
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ifeq ($(BR_BUILDING):$(ROOTFS_CPIO_DRACUT_CONF_FILE),y:)
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$(error No dracut config file name specified, check your BR2_TARGET_ROOTFS_CPIO_DRACUT_CONF_FILE setting)
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endif
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ifeq ($(BR2_LINUX_KERNEL),y)
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ROOTFS_CPIO_DEPENDENCIES += linux
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ROOTFS_CPIO_OPTS += --kver $(LINUX_VERSION_PROBED)
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else
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ROOTFS_CPIO_OPTS += --no-kernel
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endif
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define ROOTFS_CPIO_CMD
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mkdir -p $(ROOTFS_CPIO_DIR)/tmp
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$(HOST_DIR)/bin/dracut \
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$(ROOTFS_CPIO_OPTS) \
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-c $(ROOTFS_CPIO_DRACUT_CONF_FILE) \
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--sysroot $(TARGET_DIR) \
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--tmpdir $(ROOTFS_CPIO_DIR)/tmp \
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-M \
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--force \
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--no-compress \
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$@
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endef
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endif #BR2_TARGET_ROOTFS_CPIO_DRACUT
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ifeq ($(BR2_TARGET_ROOTFS_CPIO_UIMAGE),y)
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ROOTFS_CPIO_DEPENDENCIES += host-uboot-tools
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define ROOTFS_CPIO_UBOOT_MKIMAGE
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92
fs/cpio/dracut.conf
Normal file
92
fs/cpio/dracut.conf
Normal file
@ -0,0 +1,92 @@
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#Simple dracut config for a system without systemd
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#Dracut configuration
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show_modules=yes
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i18n_install_all=no
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lvmconf=no
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mdadmconf=no
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early_microcode=no
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hostonly=no
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hostonly_cmdline=no
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use_fstab=no
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kernel_cmdline="rd.break=initqueue"
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do_strip=no
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# Dracut modules needed
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add_dracutmodules+=" \
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busybox-init
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"
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# Modules to ignore
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omit_dracutmodules+=" \
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bash \
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biosdevname \
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btrfs \
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bluetooth \
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busybox \
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caps \
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cifs \
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crypt \
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crypt-gpg \
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dash \
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dbus-broker \
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dbus-daemon \
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dm \
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dmraid \
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dmsquash-live-ntfs \
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dracut-systemd \
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fcoe \
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fcoe-uefi \
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fs-lib \
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iscsi \
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i18n \
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lvmmerge \
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lvm \
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lunmask \
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mdraid \
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memstrack \
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mksh \
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modsign \
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mount-root \
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multipath \
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nbd \
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network-legacy \
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network-wicked \
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nfs \
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nvdimm \
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nvmf \
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parse-lunmask \
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qemu \
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qemu-net \
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resume \
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rootfs-block \
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rngd \
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systemd \
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systemd-udevd \
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systemd-coredump \
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systemd-ask-password \
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systemd-timedated \
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systemd-rfkill \
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systemd-resolved \
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systemd-hostnamed \
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systemd-initrd \
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systemd-journald \
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systemd-ldconfig \
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systemd-networkd \
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systemd-timesyncd \
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systemd-veritysetup \
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systemd-modules-load \
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systemd-sysctl \
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systemd-repart \
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systemd-sysext \
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systemd-sysusers \
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systemd-tmpfiles \
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squash \
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ssh-client \
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stratis \
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tpm2-tss \
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udev-rules \
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url-lib \
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usrmount \
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"
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