Re: [Nbd] Problems creating new device files

[Nicolas Trangez <nicolas@...1262...>]

On Mon, 2013-03-04 at 21:24 +0800, Daniele Testa wrote:
> Ok, but that is how it currently looks like:
> 
> root@...1278...:/dev# ls -al|grep nbd
> brw-rw----  1 root disk     43,   0 2013-03-02 17:04 nbd0
> brw-rw----  1 root disk     43,  16 2013-03-02 17:15 nbd1
> brw-rw----  1 root disk     43, 160 2013-03-02 17:04 nbd10
> brw-rw----  1 root disk     43, 176 2013-03-02 17:04 nbd11
> brw-rw----  1 root disk     43, 192 2013-03-02 17:04 nbd12
> brw-rw----  1 root disk     43, 208 2013-03-02 17:04 nbd13
> brw-rw----  1 root disk     43, 224 2013-03-02 17:04 nbd14
> brw-rw----  1 root disk     43, 240 2013-03-02 17:04 nbd15
> brw-rw----  1 root disk     43,  32 2013-03-02 17:16 nbd2
> brw-rw----  1 root disk     43,  48 2013-03-02 17:04 nbd3
> brw-rw----  1 root disk     43,  64 2013-03-02 17:04 nbd4
> brw-rw----  1 root disk     43,  80 2013-03-02 17:04 nbd5
> brw-rw----  1 root disk     43,  96 2013-03-02 17:04 nbd6
> brw-rw----  1 root disk     43, 112 2013-03-02 17:04 nbd7
> brw-rw----  1 root disk     43, 128 2013-03-02 17:04 nbd8
> brw-rw----  1 root disk     43, 144 2013-03-02 17:04 nbd9
> 
> The device files created by the installation skips 16 minors. Shouldn't I
> do the same if I create more files?
> Could you please give me an example how to add more device files than the
> 16 ones already there?

I didn't test, but

$ modinfo nbd
filename:       /lib/modules/3.6.10-4.fc18.x86_64/kernel/drivers/block/nbd.ko
license:        GPL
description:    Network Block Device
depends:        
intree:         Y
vermagic:       3.6.10-4.fc18.x86_64 SMP mod_unload 
parm:           nbds_max:number of network block devices to initialize
(default: 16) (int)
parm:           max_part:number of partitions per device (default: 0)
(int)
parm:           debugflags:flags for controlling debug output (int)

rings a bell.

Nicolas

> 
> Regards,
> Daniele
> 
> 
> 2013/3/4 Paul Clements <paul.clements@...856...>
> 
> > On Sun, Mar 3, 2013 at 3:05 AM, Daniele Testa <daniele.testa@...17...>
> > wrote:
> > > I am trying to create new devices files, i.e /dev/nbdXX but I'm having
> > > problems.
> > >
> > > (root@...1277...)-(/dev)# mknod /dev/nbd32 b 43 512
> > >
> > > (root@...1277...)-(/dev)# nbd-client example.com 10002 /dev/nbd32
> >
> > You should only skip minors if you have partitioning support
> > (max_part) enabled in nbd. Otherwise, nbd devices use consecutive
> > minor numbers.
> >
> > --
> > Paul
> >
> Ok, but that is how it currently looks like:
> 
> 
> root@...1278...:/dev# ls -al|grep nbd
> brw-rw----  1 root disk     43,   0 2013-03-02 17:04 nbd0
> brw-rw----  1 root disk     43,  16 2013-03-02 17:15 nbd1
> brw-rw----  1 root disk     43, 160 2013-03-02 17:04 nbd10
> brw-rw----  1 root disk     43, 176 2013-03-02 17:04 nbd11
> brw-rw----  1 root disk     43, 192 2013-03-02 17:04 nbd12
> brw-rw----  1 root disk     43, 208 2013-03-02 17:04 nbd13
> brw-rw----  1 root disk     43, 224 2013-03-02 17:04 nbd14
> brw-rw----  1 root disk     43, 240 2013-03-02 17:04 nbd15
> brw-rw----  1 root disk     43,  32 2013-03-02 17:16 nbd2
> brw-rw----  1 root disk     43,  48 2013-03-02 17:04 nbd3
> brw-rw----  1 root disk     43,  64 2013-03-02 17:04 nbd4
> brw-rw----  1 root disk     43,  80 2013-03-02 17:04 nbd5
> brw-rw----  1 root disk     43,  96 2013-03-02 17:04 nbd6
> brw-rw----  1 root disk     43, 112 2013-03-02 17:04 nbd7
> brw-rw----  1 root disk     43, 128 2013-03-02 17:04 nbd8
> brw-rw----  1 root disk     43, 144 2013-03-02 17:04 nbd9
> 
> 
> The device files created by the installation skips 16 minors.
> Shouldn't I do the same if I create more files?
> Could you please give me an example how to add more device files than
> the 16 ones already there?
> 
> 
> Regards,
> Daniele
> 
> 
> 2013/3/4 Paul Clements <paul.clements@...856...>
>         On Sun, Mar 3, 2013 at 3:05 AM, Daniele Testa
>         <daniele.testa@...17...> wrote:
>         > I am trying to create new devices files, i.e /dev/nbdXX but
>         I'm having
>         > problems.
>         >
>         > (root@...1277...)-(/dev)# mknod /dev/nbd32 b 43 512
>         >
>         > (root@...1277...)-(/dev)# nbd-client example.com 10002 /dev/nbd32
>         
>         You should only skip minors if you have partitioning support
>         (max_part) enabled in nbd. Otherwise, nbd devices use
>         consecutive
>         minor numbers.
>         
>         --
>         Paul
> 
> 
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