[PATCH 24/32] xfs: report RT data checksum information via XFS_FSOP_GEOM

[Christoph Hellwig <hch@lst.de>]

Source kernel commit: 581da73914b7380f50e435a2260a72ab8601f0e4

Report the RT data checksum flag and the checksum algorithm to userspace.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 libxfs/xfs_fs.h | 6 +++++-
 libxfs/xfs_sb.c | 5 +++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h
index 185f09f327c0..afe83ff23ef3 100644
--- a/libxfs/xfs_fs.h
+++ b/libxfs/xfs_fs.h
@@ -191,7 +191,10 @@ struct xfs_fsop_geom {
 	__u32		rgcount;	/* number of realtime groups	*/
 	__u64		rtstart;	/* start of internal rt section */
 	__u64		rtreserved;	/* RT (zoned) reserved blocks	*/
-	__u64		reserved[14];	/* reserved space		*/
+	__u8		rtcsum_type;	/* RT data checksum type	*/
+	__u8		rtcsum_blklog;	/* log2 of rtcsum bsize		*/
+	__u8		reserved_pad[6];/* reserved space		*/
+	__u64		reserved[13];	/* reserved space		*/
 };
 
 #define XFS_FSOP_GEOM_SICK_COUNTERS	(1 << 0)  /* summary counters */
@@ -250,6 +253,7 @@ typedef struct xfs_fsop_resblks {
 #define XFS_FSOP_GEOM_FLAGS_PARENT	(1 << 25) /* linux parent pointers */
 #define XFS_FSOP_GEOM_FLAGS_METADIR	(1 << 26) /* metadata directories */
 #define XFS_FSOP_GEOM_FLAGS_ZONED	(1 << 27) /* zoned rt device */
+#define XFS_FSOP_GEOM_FLAGS_DATA_CSUM	(1 << 28) /* data checksums */
 
 /*
  * Minimum and maximum sizes need for growth checks.
diff --git a/libxfs/xfs_sb.c b/libxfs/xfs_sb.c
index 2d64412363b4..372009424970 100644
--- a/libxfs/xfs_sb.c
+++ b/libxfs/xfs_sb.c
@@ -1660,6 +1660,11 @@ xfs_fs_geometry(
 		geo->flags |= XFS_FSOP_GEOM_FLAGS_METADIR;
 	if (xfs_has_zoned(mp))
 		geo->flags |= XFS_FSOP_GEOM_FLAGS_ZONED;
+	if (xfs_has_rtcsum(mp)) {
+		geo->flags |= XFS_FSOP_GEOM_FLAGS_DATA_CSUM;
+		geo->rtcsum_type = mp->m_sb.sb_rtcsum_type;
+		geo->rtcsum_blklog = mp->m_sb.sb_rtcsum_blklog;
+	}
 	geo->rtsectsize = sbp->sb_blocksize;
 	geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp);
 
-- 
2.53.0