Re: [uml-devel] hostfs as root

[Michael Richardson <mcr@sandelman.ottawa.on.ca>]

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>>>>> "Henrik" == Henrik Nordstrom <hno@marasystems.com> writes:
    Henrik> The rw mount option works fine here, but I am not using a full
    Henrik> system  
    Henrik> image but an image primarily designed for read-only root so mount
    Henrik> is happy  
    Henrik> in either case here..

  I went back to 2.4.19 + patch 47, with the same boot scripts (i.e. rootfs=,
not ubd0=)  No problem there.

    Henrik> Verify the permissions again.. also try booting in a emergency
    Henrik> shell  
    Henrik> (init=/bin/sh) to verify that it is not your system image which
    Henrik> remounts  
    Henrik> the root read-only while booting..

  Hmm. that's possible, but why would 2.4.19 not care?

  Let me try this hypothesis.... you are partly right.

  It looks like the only real complaint is that it can't open /etc/mtab~
at boot time, and it complains, and the /etc/mtab file isn't created
properly:

Mounted devfs on /dev
INIT: version 2.78 booting
Activating swap...
can't open lock file /etc/mtab~: Permission denied (use -n flag to override)
can't open lock file /etc/mtab~: Permission denied (use -n flag to override)
...

  /etc/mtab~ is created with mode 0, and this shows up in the host that way
as well. Perhaps this is the real problem. 

  Actually, I don't seem to be able to reproduce the read-only root now!
I swear it was complaining that it couldn't write, because the file system
was read only before.

cassidy-[nightly/testing/klips/east-icmp-01] mcr 1141 %ls -lta /c2/freeswan/sandboxes/nightly/UMLPOOL/east/root/etc/mtab*  
- -rw-r--r--    1 mcr      mcr             0 Sep  2 12:24 /c2/freeswan/sandboxes/nightly/UMLPOOL/east/root/etc/mtab
- ----------    1 mcr      mcr             0 Sep  2 12:24 /c2/freeswan/sandboxes/nightly/UMLPOOL/east/root/etc/mtab~

  I tried removing the file in my boot script first, but that doesn't help.

]      Out and about in Ottawa.    hmmm... beer.                |  firewalls  [
]   Michael Richardson, Sandelman Software Works, Ottawa, ON    |net architect[
] mcr@sandelman.ottawa.on.ca http://www.sandelman.ottawa.on.ca/ |device driver[
] panic("Just another Debian/notebook using, kernel hacking, security guy");  [




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