LU-5814 lov: use obd_get_info() to get def/max LOV EA sizes

[fs/lustre-release.git] / lustre / lov / lov_obd.c

diff --git a/lustre/lov/lov_obd.c b/lustre/lov/lov_obd.c
index 354f9ff..fcdfbca 100644 (file)
--- a/lustre/lov/lov_obd.c
+++ b/lustre/lov/lov_obd.c
@@ -1298,29 +1298,34 @@ static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
 {
        struct obd_device *obddev = class_exp2obd(exp);
        struct lov_obd *lov = &obddev->u.lov;
-       int rc;
-        ENTRY;
+       struct lov_desc *ld = &lov->desc;
+       int rc = 0;
+       ENTRY;
 
-        if (!vallen || !val)
-                RETURN(-EFAULT);
+       if (vallen == NULL || val == NULL)
+               RETURN(-EFAULT);
 
-        obd_getref(obddev);
+       obd_getref(obddev);
 
-       if (KEY_IS(KEY_LOVDESC)) {
-                struct lov_desc *desc_ret = val;
-                *desc_ret = lov->desc;
+       if (KEY_IS(KEY_MAX_EASIZE)) {
+               u32 max_stripe_count = min_t(u32, ld->ld_active_tgt_count,
+                                            LOV_MAX_STRIPE_COUNT);
 
-                GOTO(out, rc = 0);
-        } else if (KEY_IS(KEY_TGT_COUNT)) {
-                *((int *)val) = lov->desc.ld_tgt_count;
-                GOTO(out, rc = 0);
-        }
+               *((u32 *)val) = lov_mds_md_size(max_stripe_count, LOV_MAGIC_V3);
+       } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
+               u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count,
+                                            LOV_MAX_STRIPE_COUNT);
 
-        rc = -EINVAL;
+               *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3);
+       } else if (KEY_IS(KEY_TGT_COUNT)) {
+               *((int *)val) = lov->desc.ld_tgt_count;
+       } else {
+               rc = -EINVAL;
+       }
 
-out:
-        obd_putref(obddev);
-        RETURN(rc);
+       obd_putref(obddev);
+
+       RETURN(rc);
 }
 
 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,