linux.git/include/linux/libnvdimm.h, branch v5.7-rc2

libnvdimm/region: Introduce NDD_LABELING

2020-03-17T19:23:21+00:00

The NDD_ALIASING flag is used to indicate where pmem capacity might
alias with blk capacity and require labeling. It is also used to
indicate whether the DIMM supports labeling. Separate this latter
capability into its own flag so that the NDD_ALIASING flag is scoped to
true aliased configurations.

To my knowledge aliased configurations only exist in the ACPI spec,
there are no known platforms that ship this support in production.

This clarity allows namespace-capacity alignment constraints around
interleave-ways to be relaxed.

Cc: Vishal Verma 
Cc: Oliver O'Halloran 
Reviewed-by: Jeff Moyer 
Reviewed-by: Aneesh Kumar K.V 
Link: https://lore.kernel.org/r/158041477856.3889308.4212605617834097674.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams

libnvdimm: Move nvdimm_bus_attribute_group to device_type

2019-11-19T17:52:12+00:00

A 'struct device_type' instance can carry default attributes for the
device. Use this facility to remove the export of
nvdimm_bus_attribute_group and put the responsibility on the core rather
than leaf implementations to define this attribute.

Cc: Ira Weiny 
Cc: Michael Ellerman 
Cc: "Oliver O'Halloran" 
Cc: Vishal Verma 
Cc: Aneesh Kumar K.V 
Signed-off-by: Dan Williams 
Reviewed-by: Aneesh Kumar K.V 
Link: https://lore.kernel.org/r/157309903815.1582359.6418211876315050283.stgit@dwillia2-desk3.amr.corp.intel.com

libnvdimm: Move nvdimm_attribute_group to device_type

2019-11-19T17:52:12+00:00

A 'struct device_type' instance can carry default attributes for the
device. Use this facility to remove the export of
nvdimm_attribute_group and put the responsibility on the core rather
than leaf implementations to define this attribute.

Cc: Ira Weiny 
Cc: Michael Ellerman 
Cc: "Oliver O'Halloran" 
Cc: Vishal Verma 
Cc: Aneesh Kumar K.V 
Signed-off-by: Dan Williams 
Reviewed-by: Aneesh Kumar K.V 
Link: https://lore.kernel.org/r/157309903201.1582359.10966209746585062329.stgit@dwillia2-desk3.amr.corp.intel.com

libnvdimm: Move nd_mapping_attribute_group to device_type

2019-11-19T17:52:12+00:00

A 'struct device_type' instance can carry default attributes for the
device. Use this facility to remove the export of
nd_mapping_attribute_group and put the responsibility on the core rather
than leaf implementations to define this attribute.

Cc: Ira Weiny 
Cc: Michael Ellerman 
Cc: "Oliver O'Halloran" 
Cc: Vishal Verma 
Cc: Aneesh Kumar K.V 
Signed-off-by: Dan Williams 
Reviewed-by: Aneesh Kumar K.V 
Link: https://lore.kernel.org/r/157309902686.1582359.6749533709859492704.stgit@dwillia2-desk3.amr.corp.intel.com

libnvdimm: Move nd_region_attribute_group to device_type

2019-11-19T17:52:12+00:00

A 'struct device_type' instance can carry default attributes for the
device. Use this facility to remove the export of
nd_region_attribute_group and put the responsibility on the core rather
than leaf implementations to define this attribute.

Cc: Ira Weiny 
Cc: Michael Ellerman 
Cc: "Oliver O'Halloran" 
Cc: Vishal Verma 
Cc: Aneesh Kumar K.V 
Signed-off-by: Dan Williams 
Reviewed-by: Aneesh Kumar K.V 
Link: https://lore.kernel.org/r/157309902169.1582359.16828508538444551337.stgit@dwillia2-desk3.amr.corp.intel.com

libnvdimm: Move nd_numa_attribute_group to device_type

2019-11-19T17:51:54+00:00

A 'struct device_type' instance can carry default attributes for the
device. Use this facility to remove the export of
nd_numa_attribute_group and put the responsibility on the core rather
than leaf implementations to define this attribute.

Cc: Ira Weiny 
Cc: Michael Ellerman 
Cc: "Oliver O'Halloran" 
Cc: Vishal Verma 
Cc: Aneesh Kumar K.V 
Reviewed-by: Aneesh Kumar K.V 
Link: https://lore.kernel.org/r/157401269537.43284.14411189404186877352.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams

libnvdimm: Move nd_device_attribute_group to device_type

2019-11-17T17:17:39+00:00

A 'struct device_type' instance can carry default attributes for the
device. Use this facility to remove the export of
nd_device_attribute_group and put the responsibility on the core rather
than leaf implementations to define this attribute.

For regions this creates a new nd_region_attribute_groups[] added to the
per-region device-type instances.

Cc: Ira Weiny 
Cc: Michael Ellerman 
Cc: "Oliver O'Halloran" 
Cc: Vishal Verma 
Cc: Aneesh Kumar K.V 
Reviewed-by: Aneesh Kumar K.V 
Link: https://lore.kernel.org/r/157309901138.1582359.12909354140826530394.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams

libnvdimm/security: Introduce a 'frozen' attribute

2019-08-29T20:49:13+00:00

In the process of debugging a system with an NVDIMM that was failing to
unlock it was found that the kernel is reporting 'locked' while the DIMM
security interface is 'frozen'. Unfortunately the security state is
tracked internally as an enum which prevents it from communicating the
difference between 'locked' and 'locked + frozen'. It follows that the
enum also prevents the kernel from communicating 'unlocked + frozen'
which would be useful for debugging why security operations like 'change
passphrase' are disabled.

Ditch the security state enum for a set of flags and introduce a new
sysfs attribute explicitly for the 'frozen' state. The regression risk
is low because the 'frozen' state was already blocked behind the
'locked' state, but will need to revisit if there were cases where
applications need 'frozen' to show up in the primary 'security'
attribute. The expectation is that communicating 'frozen' is mostly a
helper for debug and status monitoring.

Reviewed-by: Dave Jiang 
Reported-by: Jeff Moyer 
Reviewed-by: Jeff Moyer 
Link: https://lore.kernel.org/r/156686729474.184120.5835135644278860826.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams

libnvdimm: add dax_dev sync flag

2019-07-05T22:19:10+00:00

This patch adds 'DAXDEV_SYNC' flag which is set
for nd_region doing synchronous flush. This later
is used to disable MAP_SYNC functionality for
ext4 & xfs filesystem for devices don't support
synchronous flush.

Signed-off-by: Pankaj Gupta 
Signed-off-by: Dan Williams

libnvdimm: nd_region flush callback support

2019-07-05T22:19:10+00:00

This patch adds functionality to perform flush from guest
to host over VIRTIO. We are registering a callback based
on 'nd_region' type. virtio_pmem driver requires this special
flush function. For rest of the region types we are registering
existing flush function. Report error returned by host fsync
failure to userspace.

Signed-off-by: Pankaj Gupta 
Signed-off-by: Dan Williams