I'm curious, the output of envstat was full? I mean, with 6 hard disks,
you only get the state of two of them?

And another thing, it would be nice to commit new drivers without
splfoo(), and convert them to use mutexes/condvars/etc.

----- Original Message ----- 
From: "Manuel Bouyer" <bouyer@antioche.eu.org>
To: <tech-kern@NetBSD.org>
Sent: Monday, April 09, 2007 12:06 AM
Subject: Re: port bio(4) and bioctl(8) from openbsd ?


> On Sat, Apr 07, 2007 at 07:07:19PM +0200, Manuel Bouyer wrote:
>> Hi,
>> do we want to port the bio(4) interface and associated bioctl(8) tool
>> from openbsd ? Basically it allows control of hardware RAID controllers 
>> in a
>> generic way (get states, add hot-spare, start rebuilds, etc ...).
>> On OpenBSD it's currently supported on ami(4), arc(4), ciss(4), mfi(4).
>> I won't go into the softraid stuff, at last not yet.
>> Man pages:
>> http://www.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sbin/bioctl/bioctl.8?rev=1.43&content-type=text/plain
>> http://www.openbsd.org/cgi-bin/cvsweb/~checkout~/src/share/man/man4/bio.4?rev=1.19&content-type=text/plain
>>
>> In kernel, there's a pseudo-device (bio) to which RAID controllers 
>> registers
>> (note that we can use the controllers without bio(4) in the kernel).
>> This pseudo-device keeps a list of raid controllers, and dispatch the
>> IOCTLs. This avoids having one major device per controller driver type.
>>
>> OpenBSD has added sensors for the drives: SENSOR_DRIVE, with the states:
>> #define SENSOR_DRIVE_EMPTY    1
>> #define SENSOR_DRIVE_READY    2
>> #define SENSOR_DRIVE_POWERUP  3
>> #define SENSOR_DRIVE_ONLINE   4
>> #define SENSOR_DRIVE_IDLE     5
>> #define SENSOR_DRIVE_ACTIVE   6
>> #define SENSOR_DRIVE_REBUILD  7
>> #define SENSOR_DRIVE_POWERDOWN        8
>> #define SENSOR_DRIVE_FAIL     9
>> #define SENSOR_DRIVE_PFAIL    10
>> The benefit of this is that we could get notification in real time
>> instead of polling though bioctl.
>>
>> I want this for mfi(4), for which I have no alternatives to get RAID 
>> status
>> (if a drive fail you don't know, unless you go in front of the box and 
>> look
>> at the LEDs). I will also add support to amr(4) as I have the hardware
>> for this.
>
> OK, attached is my first cut at getting this working. I've not looked at
> kauth at all for this yet.
> Here's what it can do so far:
> cuba# bioctl -h mfi0
> Volume  Status               Size Device
> mfi0 0 Online                74G mfi0    RAID1
>      0 Online                75G 1:0.0   noencl <ATA     WDC 
> WD800JD-75MS1E04>
>      1 Online                75G 1:1.0   noencl <ATA     WDC 
> WD800JD-75MS1E04>
> mfi0 1 Online               697G mfi0    RAID5
>      0 Online               233G 1:3.0   noencl <ATA     WDC 
> WD2500JS-75N2E04>
>      1 Online               233G 1:2.0   noencl <ATA     WDC 
> WD2500JS-75N2E04>
>      2 Online               233G 1:4.0   noencl <ATA     WDC 
> WD2500JS-75N2E04>
>      3 Online               233G 1:5.0   noencl <ATA     WDC 
> WD2500JS-75N2E04>
> cuba# envstat -r
>                                mfi0:0: drive online
>                                mfi0:1: drive online
> (I still need to update the envsys man page)
> I still have to check that drive failures are properly reported, but this
> won't be before Tuesday, when I'll have physical access to the machine.
> I will also add support for amr(4) as I have hardware to test this.
>
> I've left the softraid stuff in bioctl and bio, with a note in bioctl(8)
> that softraid isn't supported yet. I expect this would be usefull for
> some adapters such as the promise "RAID" controllers. Would is be better
> to comment it out completely for now ?
>
> The diff is at ftp://asim.lip6.fr/outgoing/bouyer/bio.diff
>
> -- 
> Manuel Bouyer <bouyer@antioche.eu.org>
>     NetBSD: 26 ans d'experience feront toujours la difference
> --
>