From: Martin Wilck <mwilck@suse.com>
To: Christoph Hellwig <hch@lst.de>,
Keith Busch <keith.busch@intel.com>,
Sagi Grimberg <sagi@grimberg.me>
Cc: Martin Wilck <mwilck@suse.de>,
Johannes Thumshirn <jthumshirn@suse.de>,
Hannes Reinecke <hare@suse.de>,
linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org,
joe@perches.com
Subject: [PATCH v3 0/3] Improve readbility of NVME "wwid" attribute
Date: Thu, 20 Jul 2017 18:33:59 +0200 [thread overview]
Message-ID: <20170720163402.17793-1-mwilck@suse.com> (raw)
With the current implementation, the default "fallback" WWID generation
code (if no nguid, euid etc. are defined) for Linux NVME host and target
results in the following WWID format:
nvme.0000-3163653363666438366239656630386200-4c696e75780000000000000000000000000000000000000000000000000000000000000000000000-00000002
This is not only hard to read, it poses real problems e.g. for multipath
(dm WWIDs are limited to 128 characters).
With this patch series, the WWID on a Linux host connected to a Linux target
looks like this:
nvme.0000-65613435333665653738613464363961-4c696e7578-00000001
Changes wrt v1:
* 1/3: new, moved helper to include/linux/string.h (Christoph Hellwig)
(you suggested kernel.h, but I think this matches string.h better)
* Dropped the last patch from the v1 series that would have changed valid WWIDs for
HW NVME controllers.
Changes wrt v2:
* 3/3: Make sure no underflow occurs (Joe Perches)
Martin Wilck (3):
string.h: add memcpy_and_pad()
nvmet: identify controller: improve standard compliance
nvme: wwid_show: strip trailing 0-bytes
drivers/nvme/host/core.c | 6 ++++--
drivers/nvme/target/admin-cmd.c | 13 ++++++-------
include/linux/string.h | 30 ++++++++++++++++++++++++++++++
3 files changed, 40 insertions(+), 9 deletions(-)
--
2.13.2
next reply other threads:[~2017-07-20 16:34 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-20 16:33 Martin Wilck [this message]
2017-07-20 16:34 ` [PATCH v3 1/3] string.h: add memcpy_and_pad() Martin Wilck
2017-07-22 3:45 ` kbuild test robot
2017-07-23 18:18 ` kbuild test robot
2017-07-20 16:34 ` [PATCH v3 2/3] nvmet: identify controller: improve standard compliance Martin Wilck
2017-07-20 16:34 ` [PATCH v3 3/3] nvme: wwid_show: strip trailing 0-bytes Martin Wilck
2017-07-20 20:11 ` Keith Busch
2017-08-10 8:45 ` Christoph Hellwig
2017-08-14 20:12 ` [PATCH v4 0/3] Improve readbility of NVME "wwid" attribute (target side) Martin Wilck
2017-08-14 20:12 ` [PATCH v4 1/3] nvmet_execute_identify_ctrl: don't overwrite with 0-bytes Martin Wilck
2017-08-14 20:12 ` [PATCH v4 2/3] string.h: add memcpy_and_pad() Martin Wilck
2017-09-05 7:28 ` Arnd Bergmann
2017-09-05 18:18 ` Martin Wilck
2017-09-05 18:23 ` [PATCH] string.h: un-fortify memcpy_and_pad Martin Wilck
2017-09-05 19:26 ` Arnd Bergmann
2017-09-06 13:02 ` Arnd Bergmann
2017-08-14 20:12 ` [PATCH v4 3/3] nvmet_execute_identify_ctrl: use memcpy_and_pad() Martin Wilck
2017-08-15 9:10 ` [PATCH v4 0/3] Improve readbility of NVME "wwid" attribute (target side) Sagi Grimberg
2017-08-16 8:12 ` Christoph Hellwig
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