Re: how to use SES driver to send SES commands?

[Douglas Gilbert <dgilbert@interlog.com>]

I'm not sure what you expect from the ses driver
in the kernel. If it likes an SES device (and it
doesn't like some of them) then you will get a
small, but useful, set of "knobs" to twiddle and
read in sysfs. As far as I can see the ses driver does
not create any device nodes (as found in /dev). This
means there is no way to extend it by using the SG_IO
ioctl to send SCSI commands to the enclosure via
the ses driver. And there is no need since the sg and
bsg drivers already give you that capability.

Your question is vague, if by "send SES commands" you
are referring to SCSI commands then again my advice is
to look at what sg_senddiag and sg_ses do. If that is not
what you want then write something yourself using the
SG_IO ioctl on a bsg or sg device node.

Doug Gilbert


On 13-12-02 02:12 AM, Newtech Tan wrote:
> Hi Douglas
>
>       Thanks for your kind reply.
>
>       sg_senddiag is the sg_ses utility. But i want to use SES driver(linux/driver/scsi/ses.c), do you have any advice?
>
>
>> On 13-11-29 05:07 AM, Newtech Tan wrote:
>>> Hi friends
>>>
>>>       I subscribed the mailing list just now. Would you please to give me help?
>>>
>>>       Who can tell me how to use SES driver(linux/driver/scsi/ses.c) to send SES command(SEND DIAGNOSTIC, RECEIVE DIAGNOSTIC RESULTS) in my linux program?
>>> (I don't want to use sg_ses.)
>>
>> Then look at the source for sg_senddiag (sg_senddiag.c).
>> Your SES device is either /dev/sg2 or /dev/bsg/4:0:0:0
>>
>>> The following is my system info. /dev/sg2 is my SES device.
>>>
>>> [root@tan-sl dev]# lsscsi -g
>>> [0:0:0:0]    cd/dvd  HL-DT-ST DVD+-RW GSA-H53N B104  /dev/sr0   /dev/sg0
>>> [3:0:0:0]    disk    ATA      TOSHIBA MK8061GS ME0A  /dev/sda   /dev/sg1
>>> [4:0:0:0]    enclosu LSI      SAS616x          0502  -         /dev/sg2
>>>
>>> [root@tan-sl enclosure]# pwd
>>> /sys/class/enclosure
>>> [root@tan-sl enclosure]# ls -l
>>> total 0
>>> lrwxrwxrwx 1 root root 0 Nov 29 14:51 4:0:0:0 -> ../../devices/pci0000:00/0000:00:1c.0/0000:02:00.0/host4/port-4:0/expan
>>> der-4:0/port-4:0:0/end_device-4:0:0/target4:0:0/4:0:0:0/enclosure/4:0:0:0
>>>
>>> in linux, I can't find ses device.  Under /sys/class/enclosure, folder 4:0:0:0 existed.
>>>
>>> I will apprectiate for your help.