v3: * Do not use lazy unmount, walk each mount point then unmount. * Checks for copytoram= and loopback iso mount (archiso_loop_mnt hook) STATUS: Working (std boot, loop_mnt, pxe) with copytoram=[y|n]. NEEDS: initscript > 2011.07.3, mkinitcpio > 0.7.2, mkinitcpio-busybox > 1.18.5-1 Purpose: we need this for propertly unmount $cow_device, used for persistent dm-snapshot devices. This hook is based on work from Tom Gundersen[#1], but adapted for archiso things (specially the shutdown script) [#1] http://mailman.archlinux.org/pipermail/arch-projects/2011-July/001549.html [#2] http://projects.archlinux.org/initscripts.git/commit/?id=1fa7b4b453e96533ae1... [#3] http://mailman.archlinux.org/pipermail/arch-projects/2011-August/001749.html Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar> --- README | 7 ++++- archiso/Makefile | 6 +++++ archiso/archiso_shutdown | 40 ++++++++++++++++++++++++++++++++++++++ archiso/hooks/archiso_shutdown | 21 +++++++++++++++++++ archiso/install/archiso_shutdown | 13 ++++++++++++ configs/releng/build.sh | 3 +- configs/releng/mkinitcpio.conf | 2 +- 7 files changed, 88 insertions(+), 4 deletions(-) create mode 100644 archiso/archiso_shutdown create mode 100644 archiso/hooks/archiso_shutdown create mode 100644 archiso/install/archiso_shutdown diff --git a/README b/README index 55e84d8..c8549cd 100644 --- a/README +++ b/README @@ -81,8 +81,10 @@ INDEX ** hooks/archiso_loop_mnt -* img_dev= Device where archiso-image.iso reside. +* img_label= Set the filesystem label where archiso-image.iso. Default: (unset) +* img_dev= Device where archiso-image.iso reside. + Default: (unset) or "/dev/disk/by-label/${img_label}" * img_loop= Full path where archiso-image.iso is located on ${img_dev} Default: (unset) @@ -122,7 +124,8 @@ if nothing is specified on command line. * archiso_pxe_nbd + mkinitcpio-nfs-utils for ipconfig + nbd for nbd-client - +* archiso_shutdown + + (none) *** Image types generated by mkarchiso. diff --git a/archiso/Makefile b/archiso/Makefile index a751acd..5eac16f 100644 --- a/archiso/Makefile +++ b/archiso/Makefile @@ -12,6 +12,9 @@ install-hooks: # hooks/install are needed by mkinitcpio install -D -m 644 hooks/archiso $(DESTDIR)/lib/initcpio/hooks/archiso install -D -m 644 install/archiso $(DESTDIR)/lib/initcpio/install/archiso + install -D -m 755 archiso_shutdown $(DESTDIR)/lib/initcpio/archiso_shutdown + install -D -m 644 hooks/archiso_shutdown $(DESTDIR)/lib/initcpio/hooks/archiso_shutdown + install -D -m 644 install/archiso_shutdown $(DESTDIR)/lib/initcpio/install/archiso_shutdown install -D -m 644 hooks/archiso_pxe_nbd $(DESTDIR)/lib/initcpio/hooks/archiso_pxe_nbd install -D -m 644 install/archiso_pxe_nbd $(DESTDIR)/lib/initcpio/install/archiso_pxe_nbd install -D -m 644 hooks/archiso_loop_mnt $(DESTDIR)/lib/initcpio/hooks/archiso_loop_mnt @@ -31,6 +34,9 @@ uninstall: rm -f $(DESTDIR)/usr/bin/testiso rm -f $(DESTDIR)/lib/initcpio/hooks/archiso rm -f $(DESTDIR)/lib/initcpio/install/archiso + rm -f $(DESTDIR)/lib/initcpio/archiso_shutdown + rm -f $(DESTDIR)/lib/initcpio/hooks/archiso_shutdown + rm -f $(DESTDIR)/lib/initcpio/install/archiso_shutdown rm -f $(DESTDIR)/lib/initcpio/hooks/archiso_pxe_nbd rm -f $(DESTDIR)/lib/initcpio/install/archiso_pxe_nbd rm -f $(DESTDIR)/lib/initcpio/hooks/archiso_loop_mnt diff --git a/archiso/archiso_shutdown b/archiso/archiso_shutdown new file mode 100644 index 0000000..eacf6d3 --- /dev/null +++ b/archiso/archiso_shutdown @@ -0,0 +1,40 @@ +#!/bin/sh + +# /oldroot depends on things inside /oldroot/run/archiso... +mkdir /oldrun +mount --move /oldroot/run /oldrun + +# Unmount all mounts now. +umount $(mount | awk '$3 ~/^\/oldroot/ {print $3}' | sort -r) + +# Remove all dm-snapshot devices. +dmsetup remove_all + +# Remove all loopback devices made for dm-snapshots devices +# other misc loops like used for pure squashfs images +# and unmount/detach *.fs.sfs images. +for _lup in $(ls -r /dev/loop[1-9][0-9][0-9]); do + if ! losetup -d ${_lup} 2> /dev/null; then + umount -d ${_lup} + fi +done + +# Unmount the space used to store *.cow. +umount /oldrun/archiso/cowspace + +# Unmount boot device if needed (no copytoram=y used) +if [[ ! -d /oldrun/archiso/copytoram ]]; then + umount /oldrun/archiso/bootmnt + # Detach img_loop= and unmount img_dev= (archiso_loop_mnt hook) + if [[ -f /oldrun/archiso/img_dev_loop ]]; then + losetup -d $(cat /oldrun/archiso/img_dev_loop) + umount /oldrun/archiso/img_dev + fi +fi + +# reboot / poweroff / halt, depending on the argument passed by init +# if something invalid is passed, we halt +case "$1" in + reboot|poweroff|halt) "$1" -f ;; + *) halt -f;; +esac diff --git a/archiso/hooks/archiso_shutdown b/archiso/hooks/archiso_shutdown new file mode 100644 index 0000000..cb9ad8a --- /dev/null +++ b/archiso/hooks/archiso_shutdown @@ -0,0 +1,21 @@ +run_hook () +{ + msg -n ":: Creating shutdown ramfs..." + + mkdir -p /run/initramfs/usr/bin + mkdir /run/initramfs/usr/sbin + mkdir /run/initramfs/bin + mkdir /run/initramfs/sbin + mkdir /run/initramfs/lib + cp /bin/busybox /run/initramfs/bin/ + cp /lib/ld-* /run/initramfs/lib/ + cp /lib/lib* /run/initramfs/lib/ + cp /sbin/blockdev /run/initramfs/sbin/ + cp /sbin/lvm /run/initramfs/sbin/ + cp /sbin/dmsetup /run/initramfs/sbin/ + + chroot /run/initramfs /bin/busybox --install + cp /shutdown /run/initramfs/ + + msg "done." +} diff --git a/archiso/install/archiso_shutdown b/archiso/install/archiso_shutdown new file mode 100644 index 0000000..49dfc8c --- /dev/null +++ b/archiso/install/archiso_shutdown @@ -0,0 +1,13 @@ +build() { + SCRIPT="archiso_shutdown" + add_binary /lib/initcpio/archiso_shutdown /shutdown +} + +help () { + cat <<HELPEOF +This hook will create a shutdown initramfs in /run/initramfs +that we can pivot to on shutdown in order to unmount / and +and others mount points, dm-snapshot devices and loopback devices. +Mostly usefull for dm-snapshot persistent. +HELPEOF +} diff --git a/configs/releng/build.sh b/configs/releng/build.sh index feac4a8..aefdb9e 100755 --- a/configs/releng/build.sh +++ b/configs/releng/build.sh @@ -43,10 +43,11 @@ make_customize_root_image() { make_setup_mkinitcpio() { if [[ ! -e ${work_dir}/build.${FUNCNAME} ]]; then local _hook - for _hook in archiso archiso_pxe_nbd archiso_loop_mnt; do + for _hook in archiso archiso_pxe_nbd archiso_loop_mnt archiso_shutdown; do cp /lib/initcpio/hooks/${_hook} ${work_dir}/root-image/lib/initcpio/hooks cp /lib/initcpio/install/${_hook} ${work_dir}/root-image/lib/initcpio/install done + cp /lib/initcpio/archiso_shutdown ${work_dir}/root-image/lib/initcpio : > ${work_dir}/build.${FUNCNAME} fi } diff --git a/configs/releng/mkinitcpio.conf b/configs/releng/mkinitcpio.conf index df833eb..b8aa656 100644 --- a/configs/releng/mkinitcpio.conf +++ b/configs/releng/mkinitcpio.conf @@ -1,2 +1,2 @@ -HOOKS="base udev memdisk archiso archiso_pxe_nbd archiso_loop_mnt pata scsi sata usb fw pcmcia filesystems usbinput" +HOOKS="base udev memdisk archiso archiso_pxe_nbd archiso_loop_mnt archiso_shutdown pata scsi sata usb fw pcmcia filesystems usbinput" COMPRESSION="xz" -- 1.7.6