Messages in this thread | | | From | Johannes Thumshirn <> | Subject | [PATCH 0/7] Implement NVMe Namespace Descriptor Identification | Date | Tue, 30 May 2017 10:08:15 +0200 |
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This patchset implemets NVMe Namespace Descriptor Identification as of NVMe 1.3. The Namespace Descriptor Identification allows a NVMe host to query several Namespace Identification mechanisms, such as EUI-64, NGUID and UUID from the target. If more than one value is set by the target, it can transmit all set values to the host.
The Namespace Identification Descriptor list is the only way a target can identify itself via the newly introduced UUID to the host (instead of the EUI-64 or NGUID).
Both the Host and Target side are implemented. In order to get the Linux Host to send the Linux target implementation a Namespace Descriptor Identification command, you have to change the target's announced version code to at least 1.3.
Unfortunately the host side already did have a sysfs attribute called 'uuid' which represented the NGUID, so precautions have been taken to not break any existing userspace.
While I was already touching the relevant code paths, I decided to also include the EUI-64 in the 'Identify Namespace' command response.
The code is tested using the nvme-loop loopback target and cut against the nvme tree's nvme-4.12 branch.
A patch for nvmetcli will follow shortly.
Johannes Thumshirn (7): nvme: rename uuid to nguid in nvme_ns nvmet: add uuid field to nvme_ns and populate via configfs nvmet: add eui64 field to nvme_ns and populate via configfs nvme: also report include the EUI-64 in identify NS report nvmet: implement namespace identify descriptor list nvme: get list of namespace descriptors nvme: provide UUID value to userspace
drivers/nvme/host/core.c | 116 ++++++++++++++++++++++++++++++++++++++-- drivers/nvme/host/nvme.h | 1 + drivers/nvme/target/admin-cmd.c | 76 ++++++++++++++++++++++++++ drivers/nvme/target/configfs.c | 96 +++++++++++++++++++++++++++++++++ drivers/nvme/target/nvmet.h | 2 + include/linux/nvme.h | 14 +++++ 6 files changed, 301 insertions(+), 4 deletions(-)
-- 2.12.0
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