linux-stable.git/include/linux/nvme.h, branch v5.18.3

Merge tag 'for-5.18/drivers-2022-04-01' of git://git.kernel.dk/linux-block

2022-04-01T23:26:57+00:00

Pull block driver fixes from Jens Axboe:
 "Followup block driver updates and fixes for the 5.18-rc1 merge window.
  In detail:

   - NVMe pull request
       - Fix multipath hang when disk goes live over reconnect (Anton
         Eidelman)
       - fix RCU hole that allowed for endless looping in multipath
         round robin (Chris Leech)
       - remove redundant assignment after left shift (Colin Ian King)
       - add quirks for Samsung X5 SSDs (Monish Kumar R)
       - fix the read-only state for zoned namespaces with unsupposed
         features (Pankaj Raghav)
       - use a private workqueue instead of the system workqueue in
         nvmet (Sagi Grimberg)
       - allow duplicate NSIDs for private namespaces (Sungup Moon)
       - expose use_threaded_interrupts read-only in sysfs (Xin Hao)"

   - nbd minor allocation fix (Zhang)

   - drbd fixes and maintainer addition (Lars, Jakob, Christoph)

   - n64cart build fix (Jackie)

   - loop compat ioctl fix (Carlos)

   - misc fixes (Colin, Dongli)"

* tag 'for-5.18/drivers-2022-04-01' of git://git.kernel.dk/linux-block:
  drbd: remove check of list iterator against head past the loop body
  drbd: remove usage of list iterator variable after loop
  nbd: fix possible overflow on 'first_minor' in nbd_dev_add()
  MAINTAINERS: add drbd co-maintainer
  drbd: fix potential silent data corruption
  loop: fix ioctl calls using compat_loop_info
  nvme-multipath: fix hang when disk goes live over reconnect
  nvme: fix RCU hole that allowed for endless looping in multipath round robin
  nvme: allow duplicate NSIDs for private namespaces
  nvmet: remove redundant assignment after left shift
  nvmet: use a private workqueue instead of the system workqueue
  nvme-pci: add quirks for Samsung X5 SSDs
  nvme-pci: expose use_threaded_interrupts read-only in sysfs
  nvme: fix the read-only state for zoned namespaces with unsupposed features
  n64cart: convert bi_disk to bi_bdev->bd_disk fix build
  xen/blkfront: fix comment for need_copy
  xen-blkback: remove redundant assignment to variable i

nvme: allow duplicate NSIDs for private namespaces

2022-03-29T07:29:06+00:00

A NVMe subsystem with multiple controller can have private namespaces
that use the same NSID under some conditions:

 "If Namespace Management, ANA Reporting, or NVM Sets are supported, the
  NSIDs shall be unique within the NVM subsystem. If the Namespace
  Management, ANA Reporting, and NVM Sets are not supported, then NSIDs:
   a) for shared namespace shall be unique; and
   b) for private namespace are not required to be unique."

Reference: Section 6.1.6 NSID and Namespace Usage; NVM Express 1.4c spec.

Make sure this specific setup is supported in Linux.

Fixes: 9ad1927a3bc2 ("nvme: always search for namespace head")
Signed-off-by: Sungup Moon 
[hch: refactored and fixed the controller vs subsystem based naming
      conflict]
Signed-off-by: Christoph Hellwig 
Reviewed-by: Sagi Grimberg

nvme: add support for enhanced metadata

2022-03-07T19:49:13+00:00

NVM Express ratified TP 4068 defines new protection information formats.
Implement support for the CRC64 guard tags.

Since the block layer doesn't support variable length reference tags,
driver support for the Storage Tag space is not supported at this time.

Cc: Hannes Reinecke 
Cc: "Martin K. Petersen" 
Cc: Klaus Jensen 
Signed-off-by: Keith Busch 
Reviewed-by: Martin K. Petersen 
Link: https://lore.kernel.org/r/20220303201312.3255347-9-kbusch@kernel.org
Signed-off-by: Jens Axboe

nvme: expose cntrltype and dctype through sysfs

2022-02-28T11:45:06+00:00

TP8010 introduces the Discovery Controller Type attribute (dctype).
The dctype is returned in the response to the Identify command. This
patch exposes the dctype through the sysfs. Since the dctype depends on
the Controller Type (cntrltype), another attribute of the Identify
response, the patch also exposes the cntrltype as well. The dctype will
only be displayed for discovery controllers.

A note about the naming of this attribute:
Although TP8010 calls this attribute the Discovery Controller Type,
note that the dctype is now part of the response to the Identify
command for all controller types. I/O, Discovery, and Admin controllers
all share the same Identify response PDU structure. Non-discovery
controllers as well as pre-TP8010 discovery controllers will continue
to set this field to 0 (which has always been the default for reserved
bytes). Per TP8010, the value 0 now means "Discovery controller type is
not reported" instead of "Reserved". One could argue that this
definition is correct even for non-discovery controllers, and by
extension, exposing it in the sysfs for non-discovery controllers is
appropriate.

Signed-off-by: Martin Belanger 
Reviewed-by: Chaitanya Kulkarni 
Reviewed-by: John Meneghini 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Christoph Hellwig

nvme: add verbose error logging

2022-02-28T11:45:06+00:00

Improves logging of NVMe errors.  If NVME_VERBOSE_ERRORS is configured,
a verbose description of the error is logged, otherwise only status
codes/bits is logged.

Signed-off-by: Chaitanya Kulkarni 
[kch]: fix several nits, cosmetics, and trim down code.
Signed-off-by: Martin K. Petersen 
Signed-off-by: Alan Adamson 
Reviewed-by: Himanshu Madhani 
Reviewed-by: Keith Busch 
Signed-off-by: Christoph Hellwig

nvme: add new discovery log page entry definitions

2021-10-27T06:03:19+00:00

TP8014 adds a new SUBTYPE value and a new field EFLAGS for the
discovery log page entry.

Signed-off-by: Hannes Reinecke 
Signed-off-by: Christoph Hellwig

nvmet: use macro definitions for setting cmic value

2021-10-20T17:16:03+00:00

This makes the code more readable.

Signed-off-by: Max Gurtovoy 
Reviewed-by: Chaitanya Kulkarni 
Signed-off-by: Christoph Hellwig

nvme: add CNTRLTYPE definitions for 'identify controller'

2021-10-20T17:16:01+00:00

Update the 'identify controller' structure to define the newly added
CNTRLTYPE field.

Signed-off-by: Hannes Reinecke 
Reviewed-by: Chaitanya Kulkarni 
Reviewed-by: Himanshu Madhani 
Signed-off-by: Christoph Hellwig

nvme.h: add missing nvme_lba_range_type endianness annotations

2021-06-17T13:51:21+00:00

Signed-off-by: Wesley Sheng 
Signed-off-by: Christoph Hellwig

nvmet: add ZBD over ZNS backend support

2021-06-17T13:51:21+00:00

NVMe TP 4053 – Zoned Namespaces (ZNS) allows host software to
communicate with a non-volatile memory subsystem using zones for NVMe
protocol-based controllers. NVMeOF already support the ZNS NVMe
Protocol compliant devices on the target in the passthru mode. There
are generic zoned block devices like  Shingled Magnetic Recording (SMR)
HDDs that are not based on the NVMe protocol.

This patch adds ZNS backend support for non-ZNS zoned block devices as
NVMeOF targets.

This support includes implementing the new command set NVME_CSI_ZNS,
adding different command handlers for ZNS command set such as NVMe
Identify Controller, NVMe Identify Namespace, NVMe Zone Append,
NVMe Zone Management Send and NVMe Zone Management Receive.

With the new command set identifier, we also update the target command
effects logs to reflect the ZNS compliant commands.

Signed-off-by: Chaitanya Kulkarni 
Reviewed-by: Damien Le Moal 
Signed-off-by: Christoph Hellwig