LU-16526 lmv: module params for default dir layout

[fs/lustre-release.git] / lustre / mdd / mdd_device.c

diff --git a/lustre/mdd/mdd_device.c b/lustre/mdd/mdd_device.c
index 6fb4889..18cefa3 100644 (file)
--- a/lustre/mdd/mdd_device.c
+++ b/lustre/mdd/mdd_device.c
@@ -72,6 +72,25 @@ static struct lu_kmem_descr mdd_caches[] = {
        }
 };
 
+/**
+ * Mod params for the fs-wide (stored in ROOT) default dir layout,
+ * to be set and stored in EA, if EA is absent yet:
+ *
+ * stripe_offset, max_inherit, max_inherit_rr, see lfs setdirstripe for more
+ * details.
+ */
+static unsigned int root_stripe_offset = LMV_OFFSET_DEFAULT;
+module_param(root_stripe_offset, uint, 0444);
+MODULE_PARM_DESC(root_stripe_offset, "fs-wide default LMV stripe offset");
+
+static unsigned int root_max_inherit = LMV_INHERIT_UNLIMITED;
+module_param(root_max_inherit, uint, 0444);
+MODULE_PARM_DESC(root_max_inherit, "fs-wide default LMV max_inherit");
+
+static unsigned int root_max_inherit_rr = LMV_INHERIT_RR_ROOT;
+module_param(root_max_inherit_rr, uint, 0444);
+MODULE_PARM_DESC(root_max_inherit_rr, "fs-wide default LMV max_inherit_rr");
+
 static int mdd_connect_to_next(const struct lu_env *env, struct mdd_device *m,
                               const char *nextdev)
 {
@@ -1328,9 +1347,9 @@ static int mdd_prepare(const struct lu_env *env,
                        struct lmv_user_md lmv_default = {
                                .lum_magic              = LMV_USER_MAGIC,
                                .lum_stripe_count       = 1,
-                               .lum_stripe_offset      = LMV_OFFSET_DEFAULT,
-                               .lum_max_inherit        = LMV_INHERIT_UNLIMITED,
-                               .lum_max_inherit_rr     = LMV_INHERIT_RR_ROOT,
+                               .lum_stripe_offset      = root_stripe_offset,
+                               .lum_max_inherit        = root_max_inherit,
+                               .lum_max_inherit_rr     = root_max_inherit_rr,
                        };
 
                        th = dt_trans_create(env, mdd->mdd_bottom);