Re: Linux 2.6.26-rc4

[Al Viro]

On Tue, Jun 03, 2008 at 12:37:59PM +0200, Miklos Szeredi wrote:
> > http://www.kerneloops.org/raw.php?rawid=12419&msgid=
> > 
> > Looks like a negative inode in S_ISDIR(mnt->mnt_root->d_inode->i_mode),
> > which would be due to NFS not properly filling in its root dentry?
> 
> On second thought it's S_ISDIR(path->dentry->d_inode->i_mode), which
> means it's an autofs thing.

It is path->dentry, all right, but the question is how'd it get that way.
Look: we got that nd.path.dentry out of path_lookup() with LOOKUP_FOLLOW
as flags.  Then we'd passed it through do_new_mount() to do_add_mount()
without changes.  And went through
        /* Something was mounted here while we slept */
        while (d_mountpoint(nd->path.dentry) &&
               follow_down(&nd->path.mnt, &nd->path.dentry))
                ;
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