From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: bharrosh@panasas.com, jens.axboe@oracle.com, hch@infradead.org,
linux-scsi@vger.kernel.org, akpm@linux-foundation.org
Subject: Re: [PATCH 2/3 ver2] block layer extended-cdb support
Date: Sun, 13 Apr 2008 09:07:55 -0500 [thread overview]
Message-ID: <1208095676.4707.6.camel@localhost.localdomain> (raw)
In-Reply-To: <20080412145152C.tomof@acm.org>
On Sat, 2008-04-12 at 14:52 +0900, FUJITA Tomonori wrote:
> bsg are created only for scsi devices (and scsi objects like sas host)
> now. Are there other means to send commands except for ioctl?
Right now they are ... but the design was to allow for arbitrary packet
commands (like the frame in/frame out type that SMP needs), so the
anticipation is that it will be usable by arbitrary packet commands for
any block conforming device, examples of which would be ide taskfiles,
raid firmware commands and any other weirder native protocols. On the
other hand, this is future work and won't depend on the legacy 16 byte
cmd size.
The only block device I know that implements SG_IO is cciss, so perhaps
there's no need to support a legacy mode at all for large packet
commands.
James
next prev parent reply other threads:[~2008-04-13 14:08 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-25 16:21 [PATCHSET 0/3] Is it time for varlen extended and vendor-specific cdbs Boaz Harrosh
2008-03-25 16:22 ` [PATCH] Let scsi_cmnd->cmnd use request->cmd buffer Boaz Harrosh
2008-03-25 16:32 ` [PATCH 2/3] block layer varlen-cdb Boaz Harrosh
2008-04-03 16:43 ` James Bottomley
2008-04-03 17:26 ` Benny Halevy
2008-04-03 18:32 ` [PATCH 2/3 ver2] block layer extended-cdb support Boaz Harrosh
2008-04-04 11:46 ` Jens Axboe
2008-04-06 9:35 ` Boaz Harrosh
2008-04-06 11:05 ` Boaz Harrosh
2008-04-07 8:31 ` Jens Axboe
2008-04-12 5:52 ` FUJITA Tomonori
2008-04-13 9:13 ` Boaz Harrosh
2008-04-13 16:17 ` FUJITA Tomonori
2008-04-13 16:50 ` Boaz Harrosh
2008-04-14 9:49 ` [PATCH 2/3 ver3] " Boaz Harrosh
2008-04-14 11:04 ` FUJITA Tomonori
2008-04-14 11:28 ` Boaz Harrosh
2008-04-14 12:08 ` FUJITA Tomonori
2008-04-14 12:22 ` Boaz Harrosh
2008-04-14 11:04 ` [PATCH 2/3 ver2] " FUJITA Tomonori
2008-04-14 10:50 ` [PATCH 0/4] add large command support to the block layer FUJITA Tomonori
2008-04-14 10:50 ` [PATCH 1/4] block: no need to initialize rq->cmd in prepare_flush_fn hook FUJITA Tomonori
2008-04-14 10:50 ` [PATCH 2/4] block: no need to initialize rq->cmd with blk_get_request FUJITA Tomonori
2008-04-14 10:50 ` [PATCH 3/4] block: replace sizeof(rq->cmd) with BLK_MAX_CDB FUJITA Tomonori
2008-04-14 10:50 ` [PATCH 4/4] block: add large command support FUJITA Tomonori
2008-04-14 11:29 ` Jens Axboe
2008-04-14 12:08 ` FUJITA Tomonori
2008-04-15 22:50 ` Bartlomiej Zolnierkiewicz
2008-04-15 22:57 ` FUJITA Tomonori
2008-04-16 0:22 ` Bartlomiej Zolnierkiewicz
2008-04-16 8:33 ` Jens Axboe
2008-04-16 9:08 ` Boaz Harrosh
2008-04-16 9:42 ` Jens Axboe
2008-04-16 22:28 ` Bartlomiej Zolnierkiewicz
2008-04-17 3:59 ` FUJITA Tomonori
2008-04-17 7:07 ` Jens Axboe
2008-04-17 11:55 ` Bartlomiej Zolnierkiewicz
2008-04-17 11:58 ` Bartlomiej Zolnierkiewicz
2008-04-17 12:07 ` FUJITA Tomonori
2008-04-17 4:02 ` FUJITA Tomonori
2008-04-14 14:41 ` Pete Wyckoff
2008-04-14 22:33 ` FUJITA Tomonori
2008-04-15 13:44 ` Pete Wyckoff
2008-04-15 7:45 ` Boaz Harrosh
2008-04-15 10:05 ` FUJITA Tomonori
2008-04-15 7:29 ` Jens Axboe
2008-04-14 11:21 ` [PATCH 0/4] add large command support to the block layer FUJITA Tomonori
2008-04-14 11:38 ` Boaz Harrosh
2008-04-14 12:36 ` Boaz Harrosh
2008-04-14 13:06 ` FUJITA Tomonori
2008-04-15 12:24 ` [PATCH 0/3] scsi: variable-length CDBs support Boaz Harrosh
2008-04-15 12:30 ` [PATCH 1/3] Let scsi_cmnd->cmnd use request->cmd buffer Boaz Harrosh
2008-04-15 12:34 ` [PATCH 2/3] scsi: varlen extended and vendor-specific cdbs Boaz Harrosh
2008-04-16 2:09 ` FUJITA Tomonori
2008-04-16 6:40 ` Boaz Harrosh
2008-04-16 6:49 ` [PATCH 2/3 ver2] " Boaz Harrosh
2008-04-17 4:01 ` [PATCH 2/3] " FUJITA Tomonori
2008-04-17 12:25 ` [PATCH 2/3 ver3] " Boaz Harrosh
2008-04-17 12:49 ` Boaz Harrosh
2008-04-17 13:04 ` FUJITA Tomonori
2008-04-17 13:29 ` Boaz Harrosh
2008-04-15 12:37 ` [PATCH 3/3] iscsi_tcp: Enable large commands Boaz Harrosh
2008-04-15 13:08 ` James Smart
2008-04-15 13:38 ` Boaz Harrosh
2008-04-15 13:57 ` Benny Halevy
2008-04-15 13:46 ` FUJITA Tomonori
2008-04-13 14:07 ` James Bottomley [this message]
2008-04-13 16:17 ` [PATCH 2/3 ver2] block layer extended-cdb support FUJITA Tomonori
2008-03-25 16:36 ` [PATCH 3/3] scsi: varlen extended and vendor-specific cdbs Boaz Harrosh
2008-04-03 16:07 ` [PATCHSET 0/3] Is it time for " Boaz Harrosh
2008-04-13 16:30 ` [PATCHSET 0/4 ver2] " Boaz Harrosh
2008-04-13 16:37 ` [PATCH 1/4] Let scsi_cmnd->cmnd use request->cmd buffer Boaz Harrosh
2008-04-13 16:39 ` [PATCH 2/4] block layer extended-cdb support Boaz Harrosh
2008-04-13 16:39 ` [PATCH 3/4] scsi: varlen extended and vendor-specific cdbs Boaz Harrosh
2008-04-13 16:41 ` [PATCH 4/4] iscsi_tcp: Enable large command Boaz Harrosh
2008-04-18 17:11 ` Mike Christie
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1208095676.4707.6.camel@localhost.localdomain \
--to=james.bottomley@hansenpartnership.com \
--cc=akpm@linux-foundation.org \
--cc=bharrosh@panasas.com \
--cc=fujita.tomonori@lab.ntt.co.jp \
--cc=hch@infradead.org \
--cc=jens.axboe@oracle.com \
--cc=linux-scsi@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox