Re: [PATCH 21/38] union-mount: Support for mounting union mount file systems

[Valerie Aurora]

On Tue, Jul 13, 2010 at 12:47:02PM +0800, Ian Kent wrote:
> On Tue, Jun 15, 2010 at 11:39:51AM -0700, Valerie Aurora wrote:
> > +/**
> > + * prepare_mnt_union - do setup necessary for a union mount
> > + *
> > + * @topmost_mnt: vfsmount of topmost layer
> > + * @mntpnt: path of requested mountpoint
> > + *
> > + * A union mount clones the underlying read-only mounts and keeps them
> > + * in its own internal list of of vfsmounts, hanging off the
> > + * superblock.  The first underlying mount (at @mntpnt) has passed
> > + * check_mnt_union(), so we know we have at least one layer of union
> > + * mount underneath this one.  We union every underlying file system
> > + * that is mounted on the same mountpoint (well, pathname) and
> > + * read-only.
> 
> Last sentence looks a bit odd, would this be better?
> 
> We union every underlying file system that is mounted read-only on the
> same mountpoint (well, pathname).

Hm, I appear to have re-written that in the latest set of patches.

-VAL
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