libnvdimm/labels: Introduce getters for namespace label fields

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In preparation for LIBNVDIMM to manage labels on CXL devices deploy
helpers that abstract the label type from the implementation. The CXL
label format is mostly similar to the EFI label format with concepts /
fields added, like dynamic region creation and label type guids, and
other concepts removed like BLK-mode and interleave-set-cookie ids.

In addition to nsl_get_* helpers there is the nsl_ref_name() helper that
returns a pointer to a label field rather than copying the data.

Where changes touch the old whitespace style, update to clang-format
expectations.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/162982113002.1124374.15922077050771304490.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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This commit is contained in:

Dan Williams 2021-08-24 09:05:30 -07:00

parent ceeb0da0a0

commit b4366a827f

3 changed files with 110 additions and 46 deletions

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20

drivers/nvdimm/label.c

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70

drivers/nvdimm/namespace_devs.c

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66

drivers/nvdimm/nd.h

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