Pool allocation classes

[mirror_zfs.git] / module / zfs / dmu_objset.c

diff --git a/module/zfs/dmu_objset.c b/module/zfs/dmu_objset.c
index 9adda320fff977f7dd083392c319843af87a709f..3c9a817f7bec6398e28c1d5a97bbf84c91d532d5 100644 (file)
--- a/module/zfs/dmu_objset.c
+++ b/module/zfs/dmu_objset.c
@@ -314,6 +314,20 @@ dnodesize_changed_cb(void *arg, uint64_t newval)
        }
 }
 
+static void
+smallblk_changed_cb(void *arg, uint64_t newval)
+{
+       objset_t *os = arg;
+
+       /*
+        * Inheritance and range checking should have been done by now.
+        */
+       ASSERT(newval <= SPA_OLD_MAXBLOCKSIZE);
+       ASSERT(ISP2(newval));
+
+       os->os_zpl_special_smallblock = newval;
+}
+
 static void
 logbias_changed_cb(void *arg, uint64_t newval)
 {
@@ -556,6 +570,12 @@ dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
                                    zfs_prop_to_name(ZFS_PROP_DNODESIZE),
                                    dnodesize_changed_cb, os);
                        }
+                       if (err == 0) {
+                               err = dsl_prop_register(ds,
+                                   zfs_prop_to_name(
+                                   ZFS_PROP_SPECIAL_SMALL_BLOCKS),
+                                   smallblk_changed_cb, os);
+                       }
                }
                if (needlock)
                        dsl_pool_config_exit(dmu_objset_pool(os), FTAG);