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authorMilan Broz <gmazyland@gmail.com>2017-01-04 22:23:51 +0300
committerMike Snitzer <snitzer@redhat.com>2017-03-07 21:28:32 +0300
commit9b4b5a797cf8a8d904df979891a8de53f2cb9694 (patch)
treed6d677b0fdb95886d7155d3f58978b4ee8249eec /drivers/md/dm-table.c
parentb29d4986d0da1a27cd35917cdb433672f5c95d7f (diff)
downloadlinux-9b4b5a797cf8a8d904df979891a8de53f2cb9694.tar.xz
dm table: add flag to allow target to handle its own integrity metadata
Add DM_TARGET_INTEGRITY flag that specifies bio integrity metadata is not inherited but implemented in the target itself. Signed-off-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-table.c')
-rw-r--r--drivers/md/dm-table.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 3ad16d9c9d5a..b0600840e734 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -47,6 +47,7 @@ struct dm_table {
bool integrity_supported:1;
bool singleton:1;
bool all_blk_mq:1;
+ unsigned integrity_added:1;
/*
* Indicates the rw permissions for the new logical
@@ -725,6 +726,9 @@ int dm_table_add_target(struct dm_table *t, const char *type,
t->immutable_target_type = tgt->type;
}
+ if (dm_target_has_integrity(tgt->type))
+ t->integrity_added = 1;
+
tgt->table = t;
tgt->begin = start;
tgt->len = len;
@@ -1168,6 +1172,10 @@ static int dm_table_register_integrity(struct dm_table *t)
struct mapped_device *md = t->md;
struct gendisk *template_disk = NULL;
+ /* If target handles integrity itself do not register it here. */
+ if (t->integrity_added)
+ return 0;
+
template_disk = dm_table_get_integrity_disk(t);
if (!template_disk)
return 0;
@@ -1394,6 +1402,9 @@ static void dm_table_verify_integrity(struct dm_table *t)
{
struct gendisk *template_disk = NULL;
+ if (t->integrity_added)
+ return;
+
if (t->integrity_supported) {
/*
* Verify that the original integrity profile