On Wed, Oct 01, 2008 at 02:45:45PM -0400, Christoph Hellwig wrote: > On Tue, Sep 30, 2008 at 05:40:54PM -0700, Andreas Dilger wrote: > > Instead of implementing an EXT4_IOC_FIEMAP_INO ioctl, what we had implemented > > is an EXT4_IOC_WRAPPER, which takes as arguments the inode number and the > > ioctl command + original ioctl data. This allows inode ioctls to be called > > against the filesystem root for arbitrary inodes, and doesn't require new > > implementation for each ioctl: > > Or just provide more generic open by handle functionality. Shouldn't be > too much of a problem to do it in the VFS by reusing the exportfs code. > A while back I had implemented an "open by inode" patch for a friend who needed it for their startup. I never posted it because (a) even though it was only optionally enabled via a mount option, if you allow non-root users to access it, it blows a whole through traditional unix permissions semantics (i.e., a mode 700 directory no longer protects files underneath that directory), and (b) I was sure that Al Viro would consider the hacks that I needed to make it work to be far too ugly to live. :-) - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
