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libnvdimm, label: populate 'isetcookie' for blk-aperture namespaces

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Starting with the v1.2 definition of namespace labels, the isetcookie
field is populated and validated for blk-aperture namespaces. This adds
some safety against inadvertent copying of namespace labels from one
DIMM-device to another.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2017-06-06 11:39:30 -07:00
parent faec6f8a1c
commit 8f2bc2430e
3 changed files with 26 additions and 13 deletions
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20
drivers/nvdimm/namespace_devs.c
View file

@ -2065,12 +2065,20 @@ struct device *create_namespace_blk(struct nd_region *nd_region,
struct device *dev = NULL;
struct resource *res;
if (namespace_label_has(ndd, type_guid)
&& !guid_equal(&nd_set->type_guid,
&nd_label->type_guid)) {
dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n",
nd_set->type_guid.b, nd_label->type_guid.b);
return ERR_PTR(-EAGAIN);
if (namespace_label_has(ndd, type_guid)) {
if (!guid_equal(&nd_set->type_guid, &nd_label->type_guid)) {
dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n",
nd_set->type_guid.b,
nd_label->type_guid.b);
return ERR_PTR(-EAGAIN);
}
if (nd_label->isetcookie != __cpu_to_le64(nd_set->cookie2)) {
dev_dbg(ndd->dev, "expect cookie %#llx got %#llx\n",
nd_set->cookie2,
__le64_to_cpu(nd_label->isetcookie));
return ERR_PTR(-EAGAIN);
}
}
nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);