dm snapshot: add new persistent store option to support overflow

[cascardo/linux.git] / drivers / md / dm-exception-store.c

diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c
index ebaa4f8..192bb8b 100644 (file)
--- a/drivers/md/dm-exception-store.c
+++ b/drivers/md/dm-exception-store.c
@@ -203,7 +203,7 @@ int dm_exception_store_create(struct dm_target *ti, int argc, char **argv,
                return -EINVAL;
        }
 
-       tmp_store = kmalloc(sizeof(*tmp_store), GFP_KERNEL);
+       tmp_store = kzalloc(sizeof(*tmp_store), GFP_KERNEL);
        if (!tmp_store) {
                ti->error = "Exception store allocation failed";
                return -ENOMEM;
@@ -215,7 +215,7 @@ int dm_exception_store_create(struct dm_target *ti, int argc, char **argv,
        else if (persistent == 'N')
                type = get_type("N");
        else {
-               ti->error = "Persistent flag is not P or N";
+               ti->error = "Exception store type is not P or N";
                r = -EINVAL;
                goto bad_type;
        }
@@ -233,7 +233,7 @@ int dm_exception_store_create(struct dm_target *ti, int argc, char **argv,
        if (r)
                goto bad;
 
-       r = type->ctr(tmp_store, 0, NULL);
+       r = type->ctr(tmp_store, (strlen(argv[0]) > 1 ? &argv[0][1] : NULL));
        if (r) {
                ti->error = "Exception store type constructor failed";
                goto bad;