diff mbox series

[RFC,v2,3/3] dm: expand valid types for dm-ioctl

Message ID 20181121032702.3048-4-yehs2007@zoho.com (mailing list archive)
State Rejected, archived
Delegated to: Mike Snitzer
Headers show
Series realize dax_operations for dm-snapshot | expand

Commit Message

Huaisheng Ye Nov. 21, 2018, 3:27 a.m. UTC 
From: Huaisheng Ye <yehs1@lenovo.com>

If use DAX way to mount the origin device of dm_snapshot, when
merging back snapshot to origin, system call table_load during the
construction of snapshot-merge will try to detect new dm_table's type
equals to the existed md's type or not.
The existed type equals to DM_TYPE_DAX_BIO_BASED, but the new created
type belongs to DM_TYPE_BIO_BASED. So, we need to expand valid_type in
function is_valid_type.

Signed-off-by: Huaisheng Ye <yehs1@lenovo.com>
---
 drivers/md/dm-ioctl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index a27016e..158d657 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1295,7 +1295,8 @@  static int populate_table(struct dm_table *table,
 static bool is_valid_type(enum dm_queue_mode cur, enum dm_queue_mode new)
 {
 	if (cur == new ||
-	    (cur == DM_TYPE_BIO_BASED && new == DM_TYPE_DAX_BIO_BASED))
+	    (cur == DM_TYPE_BIO_BASED && new == DM_TYPE_DAX_BIO_BASED) ||
+	    (cur == DM_TYPE_DAX_BIO_BASED && new == DM_TYPE_BIO_BASED))
 		return true;
 
 	return false;