libnvdimm/labels: Introduce the concept of multi-range namespace labels

Browse source

The CXL specification defines a mechanism for namespaces to be comprised
of multiple dis-contiguous ranges. Introduce that concept to the legacy
NVDIMM namespace implementation with a new nsl_set_nrange() helper, that
sets the number of ranges to 1. Once the NVDIMM subsystem supports CXL
labels and updates its namespace capacity provisioning for
dis-contiguous support nsl_set_nrange() can be updated, but in the
meantime CXL label validation requires nrange be non-zero.

Reported-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/163116430804.2460985.5482188351381597529.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

...

This commit is contained in:

Dan Williams 2021-09-08 22:11:48 -07:00

parent 8172db9252

commit 42e192aa98

2 changed files with 14 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

drivers/nvdimm/label.c

View file

13

drivers/nvdimm/nd.h

View file