Commit f8df1fdf authored by Mike Snitzer's avatar Mike Snitzer

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
......@@ -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;
}
......
......@@ -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)
......
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