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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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7
drivers/acpi/nfit/core.c
View File

@ -1736,12 +1736,12 @@ static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
struct nd_region_desc *ndr_desc,
struct acpi_nfit_system_address *spa)
{
int i, spa_type = nfit_spa_type(spa);
struct device *dev = acpi_desc->dev;
struct nd_interleave_set *nd_set;
u16 nr = ndr_desc->num_mappings;
struct nfit_set_info2 *info2;
struct nfit_set_info *info;
int i;
nd_set = devm_kzalloc(dev, sizeof(*nd_set), GFP_KERNEL);
if (!nd_set)
@ -1749,11 +1749,6 @@ static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
ndr_desc->nd_set = nd_set;
guid_copy(&nd_set->type_guid, (guid_t *) spa->range_guid);
if (spa_type == NFIT_SPA_PM || spa_type == NFIT_SPA_VOLATILE)
/* pass */;
else
return 0;
info = devm_kzalloc(dev, sizeof_nfit_set_info(nr), GFP_KERNEL);
if (!info)
return -ENOMEM;

12
drivers/nvdimm/label.c
View File

@ -787,7 +787,17 @@ static int __blk_label_update(struct nd_region *nd_region,
nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL);
nd_label->nlabel = __cpu_to_le16(0); /* N/A */
nd_label->position = __cpu_to_le16(0); /* N/A */
nd_label->isetcookie = __cpu_to_le64(0); /* N/A */
/*
* Use the presence of the type_guid as a flag to
* determine isetcookie usage for blk-aperture
* namespaces.
*/
if (namespace_label_has(ndd, type_guid))
nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2);
else
nd_label->isetcookie = __cpu_to_le64(0); /* N/A */
nd_label->dpa = __cpu_to_le64(res->start);
nd_label->rawsize = __cpu_to_le64(resource_size(res));
nd_label->lbasize = __cpu_to_le64(nsblk->lbasize);

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);