From 9ec041ea40dbc6425c0ee6ae15786e5ab1d6aad6 Mon Sep 17 00:00:00 2001
From: Luca Boccassi <bluca@debian.org>
Date: Fri, 10 Feb 2023 01:06:12 +0000
Subject: [PATCH] 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 <bluca@debian.org>
Link: https://lore.kernel.org/r/20230210010612.28729-1-luca.boccassi@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
block/sed-opal.c | 2 ++
include/uapi/linux/sed-opal.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/block/sed-opal.c b/block/sed-opal.c
index 463873f61e01e..c320093c14f12 100644
--- 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
index 1fed3c9294fc5..d7a1524023dba 100644
--- 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;
--
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