This provides a nice little shortcut to get the integrity data for
drivers like NVMe that only support a single integrity segment.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
include/linux/blkdev.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 255e20313cde..f9a072610d28 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1552,6 +1552,16 @@ static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
return bio_integrity_intervals(bi, sectors) * bi->tuple_size;
}
+/*
+ * Return the first bvec that contains integrity data. In general only
+ * drivers that are limited to a single integrity segment should use this
+ * helper.
+ */
+static inline struct bio_vec *rq_integrity_vec(struct request *rq)
+{
+ return rq->bio->bi_integrity->bip_vec;
+}
+
#else /* CONFIG_BLK_DEV_INTEGRITY */
struct bio;
@@ -1626,6 +1636,11 @@ static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
return 0;
}
+static inline struct bio_vec *rq_integrity_vec(struct request *rq)
+{
+ return NULL;
+}
+
#endif /* CONFIG_BLK_DEV_INTEGRITY */
struct block_device_operations {
--
2.20.1
