Re: Create subvolume from a directory?

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On Thu, May 03, 2012 at 03:26:20PM +0200, Hubert Kario wrote:
> > --- a/fs/btrfs/ioctl.c
> > +++ b/fs/btrfs/ioctl.c
> > @@ -2321,6 +2321,10 @@ static noinline long btrfs_ioctl_clone(struct file
> > *file, unsigned long srcfd, goto out_drop_write;
> >         }
> > 
> > +       ret = -EXDEV;
> > +       if (src_file->f_path.mnt != file->f_path.mnt)
> 
> I'm not sure about this comparision. Is the f_path struct member used just as 
> reference to some general kernel structure?

f_path is 'struct path' pointer obtained from a 'struct file' hence the
'f_' prefix, this is a naming scheme used in vfs.

Patch updated in my git repo (branch dev/cross-subvol-clone-v2).

david
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