From b3fde74ea195d2f9f49830a29f971a0aab4cd67a Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Sun, 4 Jun 2017 10:18:39 +0900 Subject: libnvdimm, label: add address abstraction identifiers Starting with v1.2 labels, 'address abstractions' can be hinted via an address abstraction id that implies an info-block format. The standard address abstraction in the specification is the v2 format of the Block-Translation-Table (BTT). Support for that is saved for a later patch, for now we add support for the Linux supported address abstractions BTT (v1), PFN, and DAX. The new 'holder_class' attribute for namespace devices is added for tooling to specify the 'abstraction_guid' to store in the namespace label. For v1.1 labels this field is undefined and any setting of 'holder_class' away from the default 'none' value will only have effect until the driver is unloaded. Setting 'holder_class' requires that whatever device tries to claim the namespace must be of the specified class. Cc: Vishal Verma Signed-off-by: Dan Williams --- drivers/nvdimm/label.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/nvdimm/label.h') diff --git a/drivers/nvdimm/label.h b/drivers/nvdimm/label.h index f39bfb31f72f..7c8e2cc9e73e 100644 --- a/drivers/nvdimm/label.h +++ b/drivers/nvdimm/label.h @@ -112,6 +112,10 @@ struct nd_namespace_label { __le64 checksum; }; +#define NVDIMM_BTT_GUID "8aed63a2-29a2-4c66-8b12-f05d15d3922a" +#define NVDIMM_PFN_GUID "266400ba-fb9f-4677-bcb0-968f11d0d225" +#define NVDIMM_DAX_GUID "97a86d9c-3cdd-4eda-986f-5068b4f80088" + /** * struct nd_label_id - identifier string for dpa allocation * @id: "{blk|pmem}-" @@ -142,6 +146,7 @@ struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n); u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd); bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot); u32 nd_label_nfree(struct nvdimm_drvdata *ndd); +enum nvdimm_claim_class to_nvdimm_cclass(guid_t *guid); struct nd_region; struct nd_namespace_pmem; struct nd_namespace_blk; -- cgit v1.2.3-70-g09d2