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-rw-r--r--Documentation/ABI/testing/sysfs-block7
-rw-r--r--block/blk-integrity.c14
2 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index 8df003963d99..71d184dbb70d 100644
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block
@@ -60,6 +60,13 @@ Description:
Indicates whether a storage device is capable of storing
integrity metadata. Set if the device is T10 PI-capable.
+What: /sys/block/<disk>/integrity/protection_interval_bytes
+Date: July 2015
+Contact: Martin K. Petersen <martin.petersen@oracle.com>
+Description:
+ Describes the number of data bytes which are protected
+ by one integrity tuple. Typically the device's logical
+ block size.
What: /sys/block/<disk>/integrity/write_generate
Date: June 2008
diff --git a/block/blk-integrity.c b/block/blk-integrity.c
index c7508654faff..7a96f57ed195 100644
--- a/block/blk-integrity.c
+++ b/block/blk-integrity.c
@@ -289,6 +289,14 @@ static ssize_t integrity_tag_size_show(struct blk_integrity *bi, char *page)
return sprintf(page, "0\n");
}
+static ssize_t integrity_interval_show(struct blk_integrity *bi, char *page)
+{
+ if (bi != NULL)
+ return sprintf(page, "%u\n", 1 << bi->interval_exp);
+ else
+ return sprintf(page, "0\n");
+}
+
static ssize_t integrity_verify_store(struct blk_integrity *bi,
const char *page, size_t count)
{
@@ -343,6 +351,11 @@ static struct integrity_sysfs_entry integrity_tag_size_entry = {
.show = integrity_tag_size_show,
};
+static struct integrity_sysfs_entry integrity_interval_entry = {
+ .attr = { .name = "protection_interval_bytes", .mode = S_IRUGO },
+ .show = integrity_interval_show,
+};
+
static struct integrity_sysfs_entry integrity_verify_entry = {
.attr = { .name = "read_verify", .mode = S_IRUGO | S_IWUSR },
.show = integrity_verify_show,
@@ -363,6 +376,7 @@ static struct integrity_sysfs_entry integrity_device_entry = {
static struct attribute *integrity_attrs[] = {
&integrity_format_entry.attr,
&integrity_tag_size_entry.attr,
+ &integrity_interval_entry.attr,
&integrity_verify_entry.attr,
&integrity_generate_entry.attr,
&integrity_device_entry.attr,