Re: [uml-devel] hostfs as root

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

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>>>>> "Matt" == Matt Zimmerman <mdz@debian.org> writes:
    >> >>>>> "Henrik" == Henrik Nordstrom <hno@marasystems.com> writes:
    >> >> /etc/mtab~ is created with mode 0, and this shows up in the host that
    >> >> way 
    >> >> as well. Perhaps this is the real problem.
    >> 
    Henrik> Right.. hostfs will almost certainly not work well with file mode 0
    Henrik> until the virtual permissions layer is implemented.
    >> 
    Henrik> Today hostfs directly maps permissions to the host files, which
    Henrik> breaks 
    >> 
    >> But, did this change between 2.4.19-47 and 2.4.20-8?
    >> 
    >> 2.4.19 works just fine.

    Matt> Yes, it did.  Things were changed so that files could be created
    Matt> read-only 
    Matt> with O_RDWR.

  okay.. Makes sense. But, since they are mode 0, we can't open them as
the user, which root inside could do. Is there some compromise that we can
do until we have the permissions layer in place?
  Like, forcing u+r on the underlying file maybe? 

  Or, if the mode is 0, and uid=0 inside, that we chmod u+r, then open?
  I'm happy to code this, but I don't want to waste time here :-)

  I could stay with 2.4.19-47, but we'd like to run on RH9 ;-)

]      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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