linux-stable.git/include/linux/nvme.h, branch v6.8.4

nvme: implement support for relaxed effects

2024-02-13T16:46:09+00:00

NVM Express TP4167 provides a way for controllers to report a relaxed
execution constraint. Specifically, it notifies of exclusivity for IO
vs. admin commands instead of grouping these together. If set, then we
don't need to freeze IO in order to execute that admin command. The
freezing distrupts IO processes, so it's nice to avoid that if the
controller tells us it's not necessary.

Reviewed-by: Christoph Hellwig 
Signed-off-by: Keith Busch

nvme: take const cmd pointer in read-only helpers

2024-02-01T00:06:12+00:00

nvme_is_fabrics() and nvme_is_write() only read struct nvme_command,
so take it by const pointer. This allows callers to pass a const pointer
and communicates that these functions don't modify the command.

Signed-off-by: Caleb Sander 
Reviewed-by: Chaitanya Kulkarni 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Sagi Grimberg 
Signed-off-by: Keith Busch

nvmet: unify aer type enum

2024-01-23T16:29:08+00:00

The host and target use two definition of aer type, unify
them into a single one.

Signed-off-by: Guixin Liu 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Sagi Grimberg 
Signed-off-by: Keith Busch

nvme: remove unused definition

2024-01-03T16:09:39+00:00

There is no users for NVMF_AUTH_HASH_LEN macro.

Reviewed-by: Israel Rukshin 
Reviewed-by: Sagi Grimberg 
Signed-off-by: Max Gurtovoy 
Signed-off-by: Keith Busch

nvme-auth: auth success1 msg always includes resp

2023-11-06T16:34:15+00:00

In cases where RVALID is false, the response is still transmitted,
but is cleared to zero.

Relevant extract from the spec:
Response R2, if valid (i.e., if the RVALID field is set to 01h),
cleared to 0h otherwise

Signed-off-by: Mark O'Donovan 
Reviewed-by: Hannes Reinecke 
Reviewed-by: Sagi Grimberg 
Reviewed-by: Christoph Hellwig

nvme: add TCP TSAS definitions

2023-10-11T17:11:54+00:00

Signed-off-by: Hannes Reinecke 
Reviewed-by: Sagi Grimberg 
Signed-off-by: Keith Busch

nvme: fix the NVME_ID_NS_NVM_STS_MASK definition

2023-07-10T16:12:31+00:00

As per NVMe command set specification 1.0c Storage tag size is 7 bits.

Fixes: 4020aad85c67 ("nvme: add support for enhanced metadata")
Signed-off-by: Ankit Kumar 
Reviewed-by: Kanchan Joshi 
Signed-off-by: Keith Busch

Merge patch series "Use block pr_ops in LIO"

2023-05-22T20:35:02+00:00

Mike Christie says:

The patches in this thread allow us to use the block pr_ops with LIO's
target_core_iblock module to support cluster applications in VMs. They
were built over Linus's tree. They also apply over linux-next and
Martin's tree and Jens's trees.

Currently, to use windows clustering or linux clustering (pacemaker +
cluster labs scsi fence agents) in VMs with LIO and vhost-scsi, you
have to use tcmu or pscsi or use a cluster aware FS/framework for the
LIO pr file. Setting up a cluster FS/framework is pain and waste when
your real backend device is already a distributed device, and pscsi
and tcmu are nice for specific use cases, but iblock gives you the
best performance and allows you to use stacked devices like
dm-multipath. So these patches allow iblock to work like pscsi/tcmu
where they can pass a PR command to the backend module. And then
iblock will use the pr_ops to pass the PR command to the real devices
similar to what we do for unmap today.

The patches are separated in the following groups:

Patch 1 - 2:

- Add block layer callouts for reading reservations and rename reservation
error code.

Patch 3 - 5:

- SCSI support for new callouts.

Patch 6:

- DM support for new callouts.

Patch 7 - 13:

- NVMe support for new callouts.

Patch 14 - 18:

- LIO support for new callouts.

This patchset has been tested with the libiscsi PGR ops and with
window's failover cluster verification test. Note that for scsi
backend devices we need this patchset:

https://lore.kernel.org/linux-scsi/20230123221046.125483-1-michael.christie@oracle.com/T/#m4834a643ffb5bac2529d65d40906d3cfbdd9b1b7

to handle UAs. To reduce the size of this patchset that's being done
separately to make reviewing easier. And to make merging easier this
patchset and the one above do not have any conflicts so can be merged
in different trees.

Link: https://lore.kernel.org/r/20230407200551.12660-1-michael.christie@oracle.com
Signed-off-by: Martin K. Petersen

nvme: Add a nvme_pr_type enum

2023-04-12T01:55:36+00:00

The next patch adds support to report the reservation type, so we need to
be able to convert from the NVMe PR value we get from the device to the
linux block layer PR value that will be returned to callers. To prepare
for that, this patch adds a nvme_pr_type enum and renames the nvme_pr_type
function.

Signed-off-by: Mike Christie 
Link: https://lore.kernel.org/r/20230407200551.12660-13-michael.christie@oracle.com
Reviewed-by: Chaitanya Kulkarni 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Martin K. Petersen

nvme: Add pr_ops read_keys support

2023-04-12T01:55:35+00:00

This patch adds support for the pr_ops read_keys callout by calling the
NVMe Reservation Report helper, then parsing that info to get the
controller's registered keys. Because the callout is only used in the
kernel where the callers, like LIO, do not know about controller/host IDs,
the callout just returns the registered keys which is required by the SCSI
PR in READ KEYS command.

Signed-off-by: Mike Christie 
Link: https://lore.kernel.org/r/20230407200551.12660-12-michael.christie@oracle.com
Reviewed-by: Chaitanya Kulkarni 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Martin K. Petersen