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[archiso] Drop aitab support

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Always create one filesystem of a fixed size (32G), format (ext4) and
know name "airootfs".

Simplify logic a lot.
This commit is contained in:
Gerardo Exequiel Pozzi 2014-06-28 00:35:50 -03:00
parent 9131f83404
commit 36459f3acc
9 changed files with 21 additions and 148 deletions
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47
docs/README.build
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@ -2,9 +2,6 @@ INDEX
-----
* Build requirements
* Image types generated by mkarchiso.
* File format for aitab.
* Why the /isolinux and /arch/boot/syslinux directories?
* Building the most basic Arch Linux live media. (configs/baseline)
* Building official Arch Linux live media. (configs/releng)
@ -39,52 +36,10 @@ INDEX
+ (none)
*** Image types generated by mkarchiso.
* image-name.sfs SquashFS image with all files directly on it.
[read-only, no dm-snapshot is used]
* image-name.fs.sfs SquashFS with only one file inside (image-name.fs),
which is an image of some type of filesystem
(ext4, ext3, ext2, xfs, btrfs), all files reside on it.
[read-write, via COW image with dm-snapshot]
*** File format for aitab.
The aitab file holds information about the filesystems images that must be
created by mkarchiso and mounted at initramfs stage from the archiso hook.
It consists of some fields which define the behaviour of images.
# <img> <mnt> <arch> <sfs_comp> <fs_type> <fs_size>
<img> Image name without extension (.fs .fs.sfs .sfs).
<mnt> Mount point.
<arch> Architecture { i686 | x86_64 | any }.
<sfs_comp> SquashFS compression type { gzip | lzo | xz }.
<fs_type> Set the filesystem type of the image
{ ext4 | ext3 | ext2 | xfs | btrfs }.
A special value of "none" denotes no usage of a filesystem.
In that case all files are pushed directly to SquashFS filesystem.
<fs_size> An absolute value of file system image size in MiB.
(example: 100, 1000, 4096, etc)
A relative value of file system free space [in percent].
{1%..99%} (example 50%, 10%, 7%).
This is an estimation, and calculated in a simple way.
Space used + 10% (estimated for metadata overhead) + desired %
*** Why the /isolinux and /arch/boot/syslinux directories?
The /isolinux directory holds files needed for the ISOLINUX boot loader
module of SYSLINUX. ISOLINUX can not find config files on
/arch/boot/syslinux, like other boot loaders modules (SYSLINUX, PXELINUX).
*** Building the most basic Arch Linux live media. (configs/baseline)
* Install needed packages.
# pacman -S git make arch-install-scripts squashfs-tools libisoburn rsync --needed
# pacman -S git make arch-install-scripts squashfs-tools libisoburn --needed
* Install archiso.
# git clone git://projects.archlinux.org/archiso.git