xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

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);