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Commit f8df1fdf authored by Mike Snitzer's avatar Mike Snitzer
Browse files

dm error: add DAX support 



Allow the error target to replace an existing DAX-enabled target.

Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 84b22f83

drivers/md/dm-table.c

+2 −1
Original line number Diff line number Diff line
@@ -922,7 +922,8 @@ static int dm_table_determine_type(struct dm_table *t) 
	if (bio_based) {

		/* We must use this table as bio-based */

		t->type = DM_TYPE_BIO_BASED;

		if (dm_table_supports_dax(t))

		if (dm_table_supports_dax(t) ||

		    (list_empty(devices) && live_md_type == DM_TYPE_DAX_BIO_BASED))

			t->type = DM_TYPE_DAX_BIO_BASED;

		return 0;

	}

drivers/md/dm-target.c

+8 −1
Original line number Diff line number Diff line
@@ -148,9 +148,15 @@ static void io_err_release_clone_rq(struct request *clone) 
{

}



static long io_err_direct_access(struct dm_target *ti, sector_t sector,

				 void __pmem **kaddr, pfn_t *pfn, long size)

{

	return -EIO;

}



static struct target_type error_target = {

	.name = "error",

	.version = {1, 4, 0},

	.version = {1, 5, 0},

	.features = DM_TARGET_WILDCARD,

	.ctr  = io_err_ctr,

	.dtr  = io_err_dtr,
@@ -158,6 +164,7 @@ static struct target_type error_target = { 
	.map_rq = io_err_map_rq,

	.clone_and_map_rq = io_err_clone_and_map_rq,

	.release_clone_rq = io_err_release_clone_rq,

	.direct_access = io_err_direct_access,

};



int __init dm_target_init(void)