Commit 36de6f51 authored Feb 23, 2018 by Toshi Kani Committed by Dan Williams Mar 15, 2018

libnvdimm, label: change min label storage size per UEFI 2.7



UEFI 2.7 defines in page 758 that:

  Initial Label Storage Area Configuration
     :
  The minimum size of the Label Storage Area is large enough to
  hold 2 index blocks and 2 labels.

The mininum index block size is 256 bytes, and the minimum label size
is also 256 bytes.

Change ND_LABEL_MIN_SIZE to (256 * 4) so that NVDIMM devices with
the minimum label storage area do not fail with the size check in
nvdimm_init_config_data().

Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

parent d812b0d5

drivers/nvdimm/label.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -33,7 +33,7 @@ enum {
		BTTINFO_UUID_LEN = 16,
		BTTINFO_FLAG_ERROR = 0x1, /* error state (read-only) */
		BTTINFO_MAJOR_VERSION = 1,
		ND_LABEL_MIN_SIZE = 512 * 129, /* see sizeof_namespace_index() */
		ND_LABEL_MIN_SIZE = 256 * 4, /* see sizeof_namespace_index() */
		ND_LABEL_ID_SIZE = 50,
		ND_NSINDEX_INIT = 0x1,
		};

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