On Wednesday 09 of May 2012 19:18:07 David Sterba wrote:
> On Thu, May 03, 2012 at 03:11:45PM +0200, Hubert Kario wrote:
> > nice, didn't know about this. Such functionality would be nice to have.
> > But then I don't think that a "recreate the array if the parameters are
> > the
> > same" is actua
On Thu, May 03, 2012 at 03:11:45PM +0200, Hubert Kario wrote:
> nice, didn't know about this. Such functionality would be nice to have.
> But then I don't think that a "recreate the array if the parameters are the
> same" is actually a good idea, lots of space for error. A pair of functions:
>
>
On Wednesday 02 of May 2012 19:36:29 David Sterba wrote:
> On Wed, May 02, 2012 at 06:42:16PM +0200, Hubert Kario wrote:
> > > I'm not sure if this is useful and sensible usecase, clearing superblock
> > > is a one-time action anyway, so it's more for the sake of tool
> > > flexibility.
> >
> > Cl
On Wed, May 02, 2012 at 06:42:16PM +0200, Hubert Kario wrote:
> A similar function in mdadm is called zero superblock so I just re used the
> name (according to the principle of least surprise). Users, even admins,
> generally don't read kernel code...
I intended to point out that the functional
On Wednesday 02 of May 2012 16:28:43 David Sterba wrote:
> On Tue, May 01, 2012 at 02:40:29PM +0200, Hubert Kario wrote:
> > +static const char * const cmd_zero_dev_usage[] = {
> > + "btrfs device zero-superblock [ ...]",
>
> FYI, this step is named 'clear superblock' in kernel code as done aft
On Wed, May 02, 2012 at 04:28:43PM +0200, David Sterba wrote:
> I had prototyped a similar utility (in perl, so nothing for progs
> inclusion for now)
attached.
david
#!/usr/bin/perl
# clear btrfs signature from a device
use Fcntl;
use constant BTRFS_SUPER_INFO_OFFSET => 64 * 1024;
use constan
On Tue, May 01, 2012 at 02:40:29PM +0200, Hubert Kario wrote:
> +static const char * const cmd_zero_dev_usage[] = {
> + "btrfs device zero-superblock [ ...]",
FYI, this step is named 'clear superblock' in kernel code as done after the
device is removed, and I suggest to consider to name the c
Signed-off-by: Hubert Kario
diff --git a/cmds-device.c b/cmds-device.c
index db625a6..05a549c 100644
--- a/cmds-device.c
+++ b/cmds-device.c
@@ -246,11 +246,58 @@ static int cmd_scan_dev(int argc, char **argv)
return 0;
}
+static const char * const cmd_zero_dev_usage[] = {
+ "btr
