diff mbox series

[v3,6/6] libnvdimm/namespace: Expose arch specific supported size align value

Message ID 20200108065219.171221-6-aneesh.kumar@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series [v3,1/6] libnvdimm/namespace: Make namespace size validation arch dependent | expand

Commit Message

Aneesh Kumar K.V Jan. 8, 2020, 6:52 a.m. UTC 
Expose supported size align as a namespace RO attribute. Usespace can use this
to validate the size argument specified when creating a new namespace.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 drivers/nvdimm/namespace_devs.c | 9 +++++++++
 1 file changed, 9 insertions(+)
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Patch

diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index dd2d65c76fcf..a8f03b72d426 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1658,6 +1658,14 @@  static ssize_t force_raw_show(struct device *dev,
 }
 static DEVICE_ATTR_RW(force_raw);
 
+static ssize_t supported_size_align_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%ld\n", arch_namespace_align_size());
+}
+static DEVICE_ATTR_RO(supported_size_align);
+
+
 static struct attribute *nd_namespace_attributes[] = {
 	&dev_attr_nstype.attr,
 	&dev_attr_size.attr,
@@ -1670,6 +1678,7 @@  static struct attribute *nd_namespace_attributes[] = {
 	&dev_attr_sector_size.attr,
 	&dev_attr_dpa_extents.attr,
 	&dev_attr_holder_class.attr,
+	&dev_attr_supported_size_align.attr,
 	NULL,
 };