diff mbox

[2/4] miscdevice: add a minor number for nbd-control

Message ID 1484949412-6903-2-git-send-email-jbacik@fb.com (mailing list archive)
State New, archived
Headers show

Commit Message

Josef Bacik Jan. 20, 2017, 9:56 p.m. UTC
NBD is moving to a loop-control esque way of managing it's device
creation and deletion.  Reserver a minor number for the new device.

Signed-off-by: Josef Bacik <jbacik@fb.com>
---
 include/linux/miscdevice.h | 1 +
 1 file changed, 1 insertion(+)

Comments

Greg KH Jan. 21, 2017, 9:03 a.m. UTC | #1
On Fri, Jan 20, 2017 at 04:56:50PM -0500, Josef Bacik wrote:
> NBD is moving to a loop-control esque way of managing it's device
> creation and deletion.  Reserver a minor number for the new device.
> 
> Signed-off-by: Josef Bacik <jbacik@fb.com>
> ---
>  include/linux/miscdevice.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
> index ed30d5d..7e5c140 100644
> --- a/include/linux/miscdevice.h
> +++ b/include/linux/miscdevice.h
> @@ -44,6 +44,7 @@
>  #define MISC_MCELOG_MINOR	227
>  #define HPET_MINOR		228
>  #define FUSE_MINOR		229
> +#define NBD_CTRL_MINOR		230

Ick, really?  Why not just use a dynamic one?  What 1990's-based systems
are you running that you would need a static misc device number for?

thanks,

greg k-h
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Josef Bacik Jan. 21, 2017, 1:25 p.m. UTC | #2
> On Jan 21, 2017, at 4:03 AM, Greg KH <gregkh@linuxfoundation.org> wrote:
> 
>> On Fri, Jan 20, 2017 at 04:56:50PM -0500, Josef Bacik wrote:
>> NBD is moving to a loop-control esque way of managing it's device
>> creation and deletion.  Reserver a minor number for the new device.
>> 
>> Signed-off-by: Josef Bacik <jbacik@fb.com>
>> ---
>> include/linux/miscdevice.h | 1 +
>> 1 file changed, 1 insertion(+)
>> 
>> diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
>> index ed30d5d..7e5c140 100644
>> --- a/include/linux/miscdevice.h
>> +++ b/include/linux/miscdevice.h
>> @@ -44,6 +44,7 @@
>> #define MISC_MCELOG_MINOR    227
>> #define HPET_MINOR        228
>> #define FUSE_MINOR        229
>> +#define NBD_CTRL_MINOR        230
> 
> Ick, really?  Why not just use a dynamic one?  What 1990's-based systems
> are you running that you would need a static misc device number for?
> 

Honestly I was just doing what loop did, I wasn't sure if there was some administration reason for needing a static minor number.  If nobody cares then I can just use a dynamic one.  Thanks,

Josef--
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Greg KH Jan. 22, 2017, 11:09 a.m. UTC | #3
On Sat, Jan 21, 2017 at 01:25:32PM +0000, Josef Bacik wrote:
> 
> > On Jan 21, 2017, at 4:03 AM, Greg KH <gregkh@linuxfoundation.org> wrote:
> > 
> >> On Fri, Jan 20, 2017 at 04:56:50PM -0500, Josef Bacik wrote:
> >> NBD is moving to a loop-control esque way of managing it's device
> >> creation and deletion.  Reserver a minor number for the new device.
> >> 
> >> Signed-off-by: Josef Bacik <jbacik@fb.com>
> >> ---
> >> include/linux/miscdevice.h | 1 +
> >> 1 file changed, 1 insertion(+)
> >> 
> >> diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
> >> index ed30d5d..7e5c140 100644
> >> --- a/include/linux/miscdevice.h
> >> +++ b/include/linux/miscdevice.h
> >> @@ -44,6 +44,7 @@
> >> #define MISC_MCELOG_MINOR    227
> >> #define HPET_MINOR        228
> >> #define FUSE_MINOR        229
> >> +#define NBD_CTRL_MINOR        230
> > 
> > Ick, really?  Why not just use a dynamic one?  What 1990's-based systems
> > are you running that you would need a static misc device number for?
> > 
> 
> Honestly I was just doing what loop did, I wasn't sure if there was
> some administration reason for needing a static minor number.  If
> nobody cares then I can just use a dynamic one.  Thanks,

Loop is very legacy, that's why it is that way, please don't duplicate
it...

thanks,

greg k-h
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diff mbox

Patch

diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index ed30d5d..7e5c140 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -44,6 +44,7 @@ 
 #define MISC_MCELOG_MINOR	227
 #define HPET_MINOR		228
 #define FUSE_MINOR		229
+#define NBD_CTRL_MINOR		230
 #define KVM_MINOR		232
 #define BTRFS_MINOR		234
 #define AUTOFS_MINOR		235