[arch-releng] [archiso] [GIT] branch master updated (fe29d5f -> 9322a0d)

[Gerardo Exequiel Pozzi]

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djgera pushed a change to branch master
in repository archiso.

      from  fe29d5f   add documentation for cow_chunksize=
       new  a637bdb   [archiso] Add optional OverlayFS support
       new  9322a0d   [archiso] Rename cowfile_size to cow_spacesize=

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Detailed log of new commits:

commit 9322a0d3b7360f47339e98533a1bcbec321921f4
Author: Gerardo Exequiel Pozzi <vmlinuz386 at gmail.com>
Date:   Tue Jan 27 14:37:05 2015 -0300

    [archiso] Rename cowfile_size to cow_spacesize=
    
    The name is more relevant since the usage is shared for both
    dm-snapshot and overlayfs.
    
    Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386 at gmail.com>

commit a637bdb8574168ab4cddef13d5de7f458650bda5
Author: Gerardo Exequiel Pozzi <vmlinuz386 at gmail.com>
Date:   Tue Jan 27 14:37:05 2015 -0300

    [archiso] Add optional OverlayFS support
    
    This is the first attemp to test overlayfs in archiso.
    The current dm-snapshot mode is keep and is enabled by default,
    while the new mode is enabled via "-s sfs" to mkarchiso.
    No new boot parameters are added, since archiso hooks detects
    if the .sfs file is for dm-snapshot (airootfs.img inside)
    or for overlayfs.
    Persistence is supported in overlayfs mode using the same options
    (cowlabel or cowdevice), but warning while in dm-snapshot mode,
    only one file is used (airootfs.cow), in overlayfs mode internal
    files for workdir/ and upperdir/ are allocated, so you can not use
    VFAT or NTFS.
    
    To test this, you need to enable [testing] in pacman.conf from
    releng profile and edit build.sh then add "-s sfs" in make_prepare()
    
    Look at:
        setarch ${arch} mkarchiso ${verbose} -w "${work_dir}" -D "${install_dir}" prepare
    Replace with:
        setarch ${arch} mkarchiso ${verbose} -w "${work_dir}" -s sfs -D "${install_dir}" prepare
    
    The build requires just half of space that the build for dm-snapshot,
    since there is no ext4 img ;)
    
    Just to remember: there is no space gain in .sfs (just about 2M)
    
    There is at least one thing during boot with machine-id service:
    Dec 24 03:31:39 archiso systemd-machine-id-commit[183]: Failed to unmount transient /etc/machine-id file in our private namespace: Invalid argument
    
    Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386 at gmail.com>

Summary of changes:
 archiso/initcpio/hooks/archiso   | 28 +++++++++++++++++++++-------
 archiso/initcpio/install/archiso |  1 +
 archiso/mkarchiso                | 34 ++++++++++++++++++++++++++++++----
 docs/README.bootparams           | 14 ++++++++------
 4 files changed, 60 insertions(+), 17 deletions(-)

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