sed-opal: add support flag for SUM in status ioctl

Not every OPAL drive supports SUM (Single User Mode), so report this information to userspace via the get-status ioctl so that we can adjust the formatting options accordingly. Tested on a kingston drive (which supports it) and a samsung one (which does not). Signed-off-by: Luca Boccassi <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jens Axboe <[email protected]>
kawasaki · Feb 17, 2023 · 9ec041e · 9ec041e
1 parent 0aa2988
commit 9ec041e
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diff --git a/block/sed-opal.c b/block/sed-opal.c
@@ -487,6 +487,8 @@ static int opal_discovery0_end(struct opal_dev *dev)
 			break;
 		case FC_SINGLEUSER:
 			single_user = check_sum(body->features);
+			if (single_user)
+				dev->flags |= OPAL_FL_SUM_SUPPORTED;
 			break;
 		case FC_GEOMETRY:
 			check_geometry(dev, body);

diff --git a/include/uapi/linux/sed-opal.h b/include/uapi/linux/sed-opal.h
@@ -144,6 +144,7 @@ struct opal_read_write_table {
 #define OPAL_FL_LOCKED			0x00000008
 #define OPAL_FL_MBR_ENABLED		0x00000010
 #define OPAL_FL_MBR_DONE		0x00000020
+#define OPAL_FL_SUM_SUPPORTED		0x00000040
 
 struct opal_status {
 	__u32 flags;