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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: dan.j.williams@intel.com
Cc: linux-nvdimm@lists.01.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: [PATCH v2 6/6] libnvdimm/namespace: Expose arch specific supported size align value
Date: Thu, 28 Nov 2019 14:00:57 +0530
Message-ID: <20191128083057.141425-6-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20191128083057.141425-1-aneesh.kumar@linux.ibm.com>

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(+)

diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 6a83db9f8734..22c714469f87 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1684,6 +1684,14 @@ 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,
@@ -1696,6 +1704,7 @@ 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,
 };
 
-- 
2.23.0
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Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-28  8:30 [PATCH v2 1/6] libnvdimm/namespace: Make namespace size validation arch dependent Aneesh Kumar K.V
2019-11-28  8:30 ` [PATCH v2 2/6] libnvdimm/namespace: Validate namespace start addr and size Aneesh Kumar K.V
2019-11-28  8:30 ` [PATCH v2 3/6] libnvdimm/namespace: Validate namespace size when creating new namespace Aneesh Kumar K.V
2019-11-28  8:30 ` [PATCH v2 4/6] libnvdimm/namespace: Add debug check while initializing namespace resource size Aneesh Kumar K.V
2019-11-28  8:30 ` [PATCH v2 5/6] libnvdimm/namespace: Align DPA based on arch restrictions Aneesh Kumar K.V
2019-11-28  8:30 ` Aneesh Kumar K.V [this message]

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