From: Boaz Harrosh <bharrosh@panasas.com>
To: Prashant Bhole <prashantsmailcenter@gmail.com>
Cc: linux-scsi@vger.kernel.org
Subject: Re: query regarding command conversion
Date: Tue, 15 Dec 2009 15:02:01 +0200 [thread overview]
Message-ID: <4B2788C9.9070003@panasas.com> (raw)
In-Reply-To: <9ff69a5d0912150356w583bfdefs1a9046842609cfba@mail.gmail.com>
On 12/15/2009 01:56 PM, Prashant Bhole wrote:
> Hi,
> I have a SATA disk which is represented by node /dev/sdb.
> I opened that device using open_blk_excl() to perform IO from a kernel module.
> IO request is submitted using generic_make_request() which is in terms
> of struct bio.
> As per my knowledge LLDs do not deal with struct bio.
>
> My question is, where does the struct bio to struct scatterlist
> conversion takes place
> before SCSI layer calls hostt->queuecommand()?
>
> Thanks,
It is done in scsi_init_sgtable() scsi_lib.c. As part of scsi's prep_fn
Boaz
prev parent reply other threads:[~2009-12-15 13:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-15 11:56 query regarding command conversion Prashant Bhole
2009-12-15 13:02 ` Boaz Harrosh [this message]
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