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| author | Dan Williams <dan.j.williams@intel.com> | 2017-08-04 17:20:16 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-08-04 17:20:16 -0700 |
| commit | 401c0a19c6c22efcaff85d5a64a396f9130da2ca (patch) | |
| tree | 051deacfc826795636237e63d1c1741e5c32bdb1 /drivers/nvdimm | |
| parent | 0dd69643061d78f3f9047c2382d8d77cca1ac943 (diff) | |
| download | linux-401c0a19c6c22efcaff85d5a64a396f9130da2ca.tar.bz2 | |
nfit, libnvdimm, region: export 'position' in mapping info
It is useful to be able to know the position of a DIMM in an
interleave-set. Consider the case where the order of the DIMMs changes
causing a namespace to be invalidated because the interleave-set cookie no
longer matches. If the before and after state of each DIMM position is
known this state debugged by the system owner.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/nd.h | 1 | ||||
| -rw-r--r-- | drivers/nvdimm/region_devs.c | 6 |
2 files changed, 5 insertions, 2 deletions
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index e9fa9e84b364..a08fc2e24fb3 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -134,6 +134,7 @@ struct nd_mapping { struct nvdimm *nvdimm; u64 start; u64 size; + int position; struct list_head labels; struct mutex lock; /* diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index 5954cfbea3fc..829d760f651c 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -723,8 +723,9 @@ static ssize_t mappingN(struct device *dev, char *buf, int n) nd_mapping = &nd_region->mapping[n]; nvdimm = nd_mapping->nvdimm; - return sprintf(buf, "%s,%llu,%llu\n", dev_name(&nvdimm->dev), - nd_mapping->start, nd_mapping->size); + return sprintf(buf, "%s,%llu,%llu,%d\n", dev_name(&nvdimm->dev), + nd_mapping->start, nd_mapping->size, + nd_mapping->position); } #define REGION_MAPPING(idx) \ @@ -965,6 +966,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, nd_region->mapping[i].nvdimm = nvdimm; nd_region->mapping[i].start = mapping->start; nd_region->mapping[i].size = mapping->size; + nd_region->mapping[i].position = mapping->position; INIT_LIST_HEAD(&nd_region->mapping[i].labels); mutex_init(&nd_region->mapping[i].lock); |