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authorDan Williams <dan.j.williams@intel.com>2015-06-17 17:14:46 -0400
committerDan Williams <dan.j.williams@intel.com>2015-06-24 21:24:10 -0400
commitbf9bccc14c05dae8caba29df6187c731710f5380 (patch)
treecbf00a172bc70598748231748ca2ad14867063ad /drivers/nvdimm/label.h
parent4a826c83db4edc040da3a66dbefd53f0cfcf457d (diff)
downloadlinux-bf9bccc14c05dae8caba29df6187c731710f5380.tar.bz2
libnvdimm: pmem label sets and namespace instantiation.
A complete label set is a PMEM-label per-dimm per-interleave-set where all the UUIDs match and the interleave set cookie matches the hosting interleave set. Present sysfs attributes for manipulation of a PMEM-namespace's 'alt_name', 'uuid', and 'size' attributes. A later patch will make these settings persistent by writing back the label. Note that PMEM allocations grow forwards from the start of an interleave set (lowest dimm-physical-address (DPA)). BLK-namespaces that alias with a PMEM interleave set will grow allocations backward from the highest DPA. Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Neil Brown <neilb@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/label.h')
-rw-r--r--drivers/nvdimm/label.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/nvdimm/label.h b/drivers/nvdimm/label.h
index d6aa0d5c6b4e..8ee1376526c7 100644
--- a/drivers/nvdimm/label.h
+++ b/drivers/nvdimm/label.h
@@ -125,4 +125,6 @@ int nd_label_validate(struct nvdimm_drvdata *ndd);
void nd_label_copy(struct nvdimm_drvdata *ndd, struct nd_namespace_index *dst,
struct nd_namespace_index *src);
size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd);
+int nd_label_active_count(struct nvdimm_drvdata *ndd);
+struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n);
#endif /* __LABEL_H__ */