Illumos #1748: desire support for reguid in zfs

[zfs.git] / module / zfs / vdev.c

diff --git a/module/zfs/vdev.c b/module/zfs/vdev.c
index 4613e95..18d2d5c 100644 (file)
--- a/module/zfs/vdev.c
+++ b/module/zfs/vdev.c
@@ -21,6 +21,8 @@
 
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ * Copyright (c) 2011 by Delphix. All rights reserved.
  */
 
 #include <sys/zfs_context.h>
@@ -291,6 +293,7 @@ vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops)
        if (spa->spa_root_vdev == NULL) {
                ASSERT(ops == &vdev_root_ops);
                spa->spa_root_vdev = vd;
+               spa->spa_load_guid = spa_generate_guid(NULL);
        }
 
        if (guid == 0 && ops != &vdev_hole_ops) {
@@ -492,7 +495,7 @@ vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id,
                    &vd->vdev_removing);
        }
 
-       if (parent && !parent->vdev_parent) {
+       if (parent && !parent->vdev_parent && alloctype != VDEV_ALLOC_ATTACH) {
                ASSERT(alloctype == VDEV_ALLOC_LOAD ||
                    alloctype == VDEV_ALLOC_ADD ||
                    alloctype == VDEV_ALLOC_SPLIT ||
@@ -669,6 +672,8 @@ vdev_top_transfer(vdev_t *svd, vdev_t *tvd)
        svd->vdev_ms_shift = 0;
        svd->vdev_ms_count = 0;
 
+       if (tvd->vdev_mg)
+               ASSERT3P(tvd->vdev_mg, ==, svd->vdev_mg);
        tvd->vdev_mg = svd->vdev_mg;
        tvd->vdev_ms = svd->vdev_ms;
 
@@ -833,7 +838,7 @@ vdev_metaslab_init(vdev_t *vd, uint64_t txg)
 
        ASSERT(oldc <= newc);
 
-       mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP);
+       mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP | KM_NODEBUG);
 
        if (oldc != 0) {
                bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp));
@@ -1069,6 +1074,15 @@ vdev_open_child(void *arg)
 boolean_t
 vdev_uses_zvols(vdev_t *vd)
 {
+/*
+ * Stacking zpools on top of zvols is unsupported until we implement a method
+ * for determining if an arbitrary block device is a zvol without using the
+ * path.  Solaris would check the 'zvol' path component but this does not
+ * exist in the Linux port, so we really should do something like stat the
+ * file and check the major number.  This is complicated by the fact that
+ * we need to do this portably in user or kernel space.
+ */
+#if 0
        int c;
 
        if (vd->vdev_path && strncmp(vd->vdev_path, ZVOL_DIR,
@@ -1077,6 +1091,7 @@ vdev_uses_zvols(vdev_t *vd)
        for (c = 0; c < vd->vdev_children; c++)
                if (vdev_uses_zvols(vd->vdev_child[c]))
                        return (B_TRUE);
+#endif
        return (B_FALSE);
 }
 
@@ -3043,13 +3058,17 @@ vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux)
 
 /*
  * Check the vdev configuration to ensure that it's capable of supporting
- * a root pool. Currently, we do not support RAID-Z or partial configuration.
- * In addition, only a single top-level vdev is allowed and none of the leaves
- * can be wholedisks.
+ * a root pool.
  */
 boolean_t
 vdev_is_bootable(vdev_t *vd)
 {
+#if defined(__sun__) || defined(__sun)
+       /*
+        * Currently, we do not support RAID-Z or partial configuration.
+        * In addition, only a single top-level vdev is allowed and none of the
+        * leaves can be wholedisks.
+        */
        int c;
 
        if (!vd->vdev_ops->vdev_op_leaf) {
@@ -3070,6 +3089,7 @@ vdev_is_bootable(vdev_t *vd)
                if (!vdev_is_bootable(vd->vdev_child[c]))
                        return (B_FALSE);
        }
+#endif /* __sun__ || __sun */
        return (B_TRUE);
 }
 
@@ -3157,3 +3177,14 @@ vdev_split(vdev_t *vd)
        }
        vdev_propagate_state(cvd);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(vdev_fault);
+EXPORT_SYMBOL(vdev_degrade);
+EXPORT_SYMBOL(vdev_online);
+EXPORT_SYMBOL(vdev_offline);
+EXPORT_SYMBOL(vdev_clear);
+
+module_param(zfs_scrub_limit, int, 0644);
+MODULE_PARM_DESC(zfs_scrub_limit, "Max scrub/resilver I/O per leaf vdev");
+#endif