January 2012 - Arch-releng - lists.archlinux.org

[arch-releng] archiso's (?) /dev/dm-* and /dev/loop devices and how to ignore them in AIF
by Dieter Plaetinck 25 Jan '12

25 Jan '12

So, in aif we switched approaches to list all possible block devices the user can install Arch to. at first, we listed blockdevices directly in /dev, by having some expressions like /dev/hd*, /dev/sd*, then later we needed to add /dev/vd*, /dev/xvd* and more to support all kinds of hardware and virtualisation solutions. This was a bit of a kludge, so we approached the problem from the other direction: Now we go over everything in /sys/block and filter _out_ the stuff we _don't_ want. (such as devices with size 0 - empty card readers - type 5 - cdrom drives) etc. see https://github.com/Dieterbe/aif/blob/develop/src/core/libs/lib-blockdevices… This seems to work at least a tiny bit better, even though the problem is similar (we need to maintain filters to remove what we don't want..) I think the final filter we need to add is for the following devices: /dev/dm-0 /dev/dm-1 /dev/dm-2 /dev/loop0 /dev/loop1 /dev/loop100 /dev/loop101 /dev/loop102 /dev/loop103 /dev/loop104 /dev/loop105 /dev/loop106 /dev/loop107 /dev/loop108 /dev/loop109 /dev/loop110 /dev/loop2 /dev/loop3 /dev/loop4 /dev/loop5 /dev/loop6 /dev/loop7 are these all created by archiso? what exactly are they for? does anyone know what is the best way to ignore them? * some property in /sys/block/<dev>/ ? * how about just maintaining a list of exactly all these filenames .. or: * how about having archiso maintain a file called /var/aif-blockdevices or something? then aif can read that file and ignore blockdevices based on what it finds there. (just don't call it archiso-blockdevices or something, because AIF is supposed to be able to run in several environments)

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[arch-releng] Away: from 01/23 to 02/01
by Gerardo Exequiel Pozzi 20 Jan '12

20 Jan '12

¡Hola! I will take holiday some days :) I am going to Esquel [#1] and Bariloche [#2]. ¡Buena suerte! [#1] http://en.wikipedia.org/wiki/Esquel [#2] http://en.wikipedia.org/wiki/Bariloche -- Gerardo Exequiel Pozzi \cos^2\alpha + \sin^2\alpha = 1

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[arch-releng] grub2 in new ISOs?
by piruthiviraj natarajan 20 Jan '12

20 Jan '12

Hi all, Is grub2 default instead of grub in the new ISOs located here? http://releng.archlinux.org/isos/

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[arch-releng] [PATCH 35/35] worker_runtime_packages(): only if $var_RUNTIME_PACKAGES is set
by Charles 17 Jan '12

17 Jan '12

From: cev <ce(a)vejnar.org> --- src/core/procedures/base | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git a/src/core/procedures/base b/src/core/procedures/base index 03f2129..57523f0 100644 --- a/src/core/procedures/base +++ b/src/core/procedures/base @@ -98,7 +98,10 @@ worker_runtime_repositories () worker_runtime_packages () { - $PACMAN -Sy --noconfirm --needed $var_RUNTIME_PACKAGES + if [ -n "$var_RUNTIME_PACKAGES" ] + then + $PACMAN -Sy --noconfirm --needed $var_RUNTIME_PACKAGES + fi } -- 1.7.8

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[arch-releng] [PATCH] [archiso] Refactor: Use losetup from util-linux
by Gerardo Exequiel Pozzi 11 Jan '12

11 Jan '12

New losetup from util-linux 2.21 uses new /dev/loop-control from Linux 3.1. Needs mkinitcpio-0.8.2+ (provides modules.devname, or workaround with earlymodules=loop) Get advantages from it! Removing custom shell code. (tested and working, will be merged when next util-linux/mkinitcpio hits [core]) Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386(a)yahoo.com.ar> --- archiso/hooks/archiso | 37 +++---------------------------------- archiso/hooks/archiso_loop_mnt | 10 ++++------ archiso/install/archiso | 1 + 3 files changed, 8 insertions(+), 40 deletions(-) diff --git a/archiso/hooks/archiso b/archiso/hooks/archiso index 2635a4c..3518d16 100644 --- a/archiso/hooks/archiso +++ b/archiso/hooks/archiso @@ -1,27 +1,3 @@ -# Initialize loopback device logic (we using on-demand mode) -# args: none -_init_loop_dev() { - loop_dev_count=99 - loop_dev_range=$(cat /sys/block/loop0/range) - loop_dev_minor=$((loop_dev_count*loop_dev_range)) -} - -# Call this function before _make_loop_dev() each time. -# args: none -_next_loop_dev() { - loop_dev_count=$((loop_dev_count+1)) - loop_dev_minor=$((loop_dev_count*loop_dev_range)) -} - -# Setup a loopback device for image passed as argument and echo the path to loopback device used. -# args: /path/to/image_file -_make_loop_dev() { - local img="${1}" - mknod /dev/loop${loop_dev_count} b 7 ${loop_dev_minor} &> /dev/null - losetup /dev/loop${loop_dev_count} "${img}" &> /dev/null - echo /dev/loop${loop_dev_count} -} - # args: source, newroot, mountpoint _mnt_fs() { local img="${1}" @@ -34,8 +10,7 @@ _mnt_fs() { mkdir -p "${newroot}${mnt}" - _next_loop_dev - ro_dev=$(_make_loop_dev "${img}") + ro_dev=$(losetup --find --show "${img}") ro_dev_size=$(blockdev --getsz ${ro_dev}) if [[ "${cow_persistent}" == "P" ]]; then @@ -54,8 +29,7 @@ _mnt_fs() { dd of="/run/archiso/cowspace/${cow_directory}/${img_name}.cow" count=0 seek=${ro_dev_size} &> /dev/null fi - _next_loop_dev - rw_dev=$(_make_loop_dev "/run/archiso/cowspace/${cow_directory}/${img_name}.cow") + rw_dev=$(losetup --find --show "/run/archiso/cowspace/${cow_directory}/${img_name}.cow") echo "0 ${ro_dev_size} snapshot ${ro_dev} ${rw_dev} ${cow_persistent} 8" | dmsetup create ${dm_snap_name} @@ -85,9 +59,8 @@ _mnt_sfs() { img="/run/archiso/copytoram/${img_fullname}" msg "done." fi - _next_loop_dev msg ":: Mounting '${img}' (SquashFS) to '${mnt}'" - if ! mount -r $(_make_loop_dev "${img}") "${mnt}" &> /dev/null ; then + if ! mount -r "${img}" "${mnt}" &> /dev/null ; then echo "ERROR: while mounting '${img}' to '${mnt}'" launch_interactive_shell fi @@ -130,8 +103,6 @@ _verify_checksum() { } run_hook() { - modprobe loop - [[ -z "${arch}" ]] && arch="$(uname -m)" [[ -z "${cowspace_size}" ]] && cowspace_size="75%" [[ -z "${copytoram_size}" ]] && copytoram_size="75%" @@ -166,8 +137,6 @@ run_hook() { archiso_mount_handler() { local newroot="${1}" - _init_loop_dev - mountpoint -q "/run/archiso/bootmnt" || _mnt_dev "${archisodevice}" "/run/archiso/bootmnt" "-r" if [[ ! -f "${aitab}" ]]; then diff --git a/archiso/hooks/archiso_loop_mnt b/archiso/hooks/archiso_loop_mnt index e52dc69..664f3a5 100644 --- a/archiso/hooks/archiso_loop_mnt +++ b/archiso/hooks/archiso_loop_mnt @@ -10,15 +10,13 @@ run_hook () { archiso_loop_mount_handler () { newroot="${1}" + local _dev_loop + msg ":: Setup a loop device from ${img_loop} located at device ${img_dev}" _mnt_dev "${img_dev}" "/run/archiso/img_dev" "-r" - _dev_loop=$(losetup -f) - if ! losetup "${_dev_loop}" "/run/archiso/img_dev/${img_loop}"; then - echo "ERROR: Setting loopback device '${_dev_loop}'" - echo " for file '/run/archiso/img_dev/${img_loop}'" - echo " Falling back to interactive prompt" - echo " You can try to fix the problem manually, log out when you are finished" + if ! _dev_loop=$(losetup --find --show "/run/archiso/img_dev/${img_loop}"); then + echo "ERROR: Setting loopback device for file '/run/archiso/img_dev/${img_loop}'" launch_interactive_shell fi diff --git a/archiso/install/archiso b/archiso/install/archiso index 3b4e223..db0fc3a 100644 --- a/archiso/install/archiso +++ b/archiso/install/archiso @@ -8,6 +8,7 @@ build () add_binary /lib/udev/cdrom_id add_binary /sbin/blockdev add_binary /sbin/dmsetup + add_binary /sbin/losetup add_binary /bin/mountpoint add_file /lib/udev/rules.d/60-cdrom_id.rules -- 1.7.8.1

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[arch-releng] archiso rebuild
by gt 05 Jan '12

05 Jan '12

Hello folks I asked this question on arch-general, but was referred here. Anyway, here's the original mail. ---------------------------------------------------------------------- I was wondering if there is a way to rebuild a custom live disc, using archiso, without having to download all the packages over again. The problem is that after making a few changes to the configuration, mainly inside root-image directory, i want to rebuild the iso. But, running build.sh says that everything is up-to-date. Alternatively, i tried removing the root squashfs file, and ran build.sh again. But, it started downloading ~500MB of packages all over again :( I'll probably have to do some more fine tuning before finalising the iso, and i don't want this to repeat itself. Please help. -- O< ascii ribbon campaign - stop html mail - www.asciiribbon.org

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[arch-releng] grub install not listing partitions
by Dieter Plaetinck 05 Jan '12

05 Jan '12

Why exactly don't we list partitions anymore? (see https://github.com/Dieterbe/aif/commit/55190c0c81fc76f8b2b3983e790f2c7aacf4…) IIRC you said it shouldn't be really needed, but turns out it is: https://bugs.archlinux.org/task/25726 see also http://mailman.archlinux.org/pipermail/arch-releng/2011-March/001557.html so we should probably list again all blockdevices (partitions and devices themselves) Dieter

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