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libnvdimm: pmem label sets and namespace instantiation.

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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>
This commit is contained in:
Dan Williams
2015-06-17 17:14:46 -04:00
parent 4a826c83db
commit bf9bccc14c
15 changed files with 1506 additions and 31 deletions
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21
drivers/nvdimm/dimm.c
View File

@@ -21,18 +21,6 @@
#include "label.h"
#include "nd.h"
static void free_data(struct nvdimm_drvdata *ndd)
{
if (!ndd)
return;
if (ndd->data && is_vmalloc_addr(ndd->data))
vfree(ndd->data);
else
kfree(ndd->data);
kfree(ndd);
}
static int nvdimm_probe(struct device *dev)
{
struct nvdimm_drvdata *ndd;
@@ -49,6 +37,8 @@ static int nvdimm_probe(struct device *dev)
ndd->dpa.start = 0;
ndd->dpa.end = -1;
ndd->dev = dev;
get_device(dev);
kref_init(&ndd->kref);
rc = nvdimm_init_nsarea(ndd);
if (rc)
@@ -74,21 +64,18 @@ static int nvdimm_probe(struct device *dev)
return 0;
err:
free_data(ndd);
put_ndd(ndd);
return rc;
}
static int nvdimm_remove(struct device *dev)
{
struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
struct resource *res, *_r;
nvdimm_bus_lock(dev);
dev_set_drvdata(dev, NULL);
for_each_dpa_resource_safe(ndd, res, _r)
nvdimm_free_dpa(ndd, res);
nvdimm_bus_unlock(dev);
free_data(ndd);
put_ndd(ndd);
return 0;
}