[PATCH 3/6] common: add a _sysfs_block_integrity_path helper

[Christoph Hellwig <hch@lst.de>]

Add a helper function to find the sysfs integrity directory for a given
block device.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
---
 common/rc | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/common/rc b/common/rc
index 2fa7ddebd8fd..5e709dd79993 100644
--- a/common/rc
+++ b/common/rc
@@ -5264,6 +5264,21 @@ _sysfs_queue_path()
 	return 1
 }
 
+# Get the sysfs block device integrity/ path for a block device, handling
+# partitions correctly.
+_sysfs_block_integrity_path()
+{
+	local disk=$(_bdev_disk_name "$1")
+	local integrity_path="/sys/block/$disk/integrity"
+
+	if [ -e "$integrity_path" ]; then
+		echo "$integrity_path"
+		return 0
+	fi
+
+	return 1
+}
+
 # Get the minimum block size of a file.  Usually this is the
 # minimum fs block size, but some filesystems (ocfs2) do block
 # mappings in larger units.
-- 
2.53.0