From: sumeetgandhare@gmail.com (sumeet gandhare)
To: kernelnewbies@lists.kernelnewbies.org
Subject: how to implement a SCSI commands through a driver?
Date: Wed, 22 Jun 2011 20:44:26 +0530 [thread overview]
Message-ID: <BANLkTi=7NHhRu0=8gLUoMXcox-A_sGiOkA@mail.gmail.com> (raw)
In-Reply-To: <BANLkTikfuBjgueW67_eeuUhTZWSq5qvxQg@mail.gmail.com>
On Wed, Jun 22, 2011 at 5:22 PM, RKK <kulkarni.ravi4@gmail.com> wrote:
> Hi all ,
> Im trying to implement a custom new storage protocl which uses SCSI
> for storage in Linux . I have been looking around for some files in
> the Linux SCSI subsystems to understand its three layered design. The
> idea is to develop a separate stack which will internally use SCSI .
> so to get started all i want to do is write a module(kernel space)
> which sends SCSI commands to target device and retrieve some
> information from it. any idea like to how to proceed and which are
> files/books that can help me in this regard. I'm reading SCSI SPC-4
> and SBC-3 specifications .
>
> Hi Ravi,
Please have a look at files drivers/scsi/scsi_lib.c , drivers/scsi/scsi.c
and drivers/scsi/scsi_scan.c, drivers/scsi/scsi_error.c
scsi_scan.c contains the scsi discovery code. scsi_error.c contains the
error recovery code ..
The main entry point function in scsi middle layer is scsi_request_fn ()
http://lxr.linux.no/#linux+v2.6.39/drivers/scsi/scsi_lib.c#L1481
Also look at function scsi_alloc_sdev () in
http://lxr.linux.no/#linux+v2.6.39/drivers/scsi/scsi_scan.c#L238 ..
Regards,
Sumeet
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> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
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prev parent reply other threads:[~2011-06-22 15:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-22 11:52 how to implement a SCSI commands through a driver? RKK
2011-06-22 15:14 ` sumeet gandhare [this message]
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