1 files changed, 31 insertions, 0 deletions

diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index c3e174b35fe6..ba4ada08564a 100644
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -150,6 +150,29 @@ int bio_integrity_add_page(struct bio *bio, struct page *page,
 }
 EXPORT_SYMBOL(bio_integrity_add_page);
 
+static struct blk_integrity *bdev_get_integrity(struct block_device *bdev)
+{
+        return bdev->bd_disk->integrity;
+}
+
+static int bdev_integrity_enabled(struct block_device *bdev, int rw)
+{
+        struct blk_integrity *bi = bdev_get_integrity(bdev);
+
+        if (bi == NULL)
+                return 0;
+
+        if (rw == READ && bi->verify_fn != NULL &&
+            (bi->flags & INTEGRITY_FLAG_READ))
+                return 1;
+
+        if (rw == WRITE && bi->generate_fn != NULL &&
+            (bi->flags & INTEGRITY_FLAG_WRITE))
+                return 1;
+
+        return 0;
+}
+
 /**
  * bio_integrity_enabled - Check whether integrity can be passed
  * @bio:        bio to check
@@ -313,6 +336,14 @@ static void bio_integrity_generate(struct bio *bio)
         }
 }
 
+static inline unsigned short blk_integrity_tuple_size(struct blk_integrity *bi)
+{
+        if (bi)
+                return bi->tuple_size;
+
+        return 0;
+}
+
 /**
  * bio_integrity_prep - Prepare bio for integrity I/O
  * @bio:        bio to prepare