Re: Dracut on different distros?

[Dave Jones <davej-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

On Wed, Mar 04, 2009 at 04:10:10PM +0100, Seewer Philippe wrote:
 
 > And another example: Yes, Debian and Ubuntu don't provide 
 > modules.{block,net,...} Can we really find a way of finding all block 
 > drivers? Certainly stupid me can't think of a way to be sure we "really 
 > really" have all block drivers without including every single .ko. Leave 
 > it to the user to specifically set drivers or the Distro to tell Dracut 
 > which drivers to include.
 
It's not really that difficult.
Those files are created in Fedora by the kernel rpm %post, which does this..

    find $RPM_BUILD_ROOT/lib/modules/$KernelVer -name "*.ko" -type f >modnames

    fgrep /drivers/ modnames | xargs --no-run-if-empty nm -upA |
    sed -n 's,^.*/\([^/]*\.ko\):  *U \(.*\)$,\1 \2,p' > drivers.undef

    collect_modules_list()
    {    
      sed -r -n -e "s/^([^ ]+) \\.?($2)\$/\\1/p" drivers.undef |
      LC_ALL=C sort -u > $RPM_BUILD_ROOT/lib/modules/$KernelVer/modules.$1
    }    

    collect_modules_list networking \
                         'register_netdev|ieee80211_register_hw|usbnet_probe'
    collect_modules_list block \
                         'ata_scsi_ioctl|scsi_add_host|blk_init_queue|register_mtd_blktrans|scsi_esp_register'


This looks complicated, but it really boils down to
"create a list of modules that use these symbols"

Rather than add this to every distros kernel packages though, it could
be done as part of depmod, and moved to module-init-tools.

	Dave

-- 
http://www.codemonkey.org.uk
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