+/*
+ * Clean up any znodes that had no links when we either crashed or
+ * (force) umounted the file system.
+ */
+void
+zfs_unlinked_drain(zfs_sb_t *zsb)
+{
+ zap_cursor_t zc;
+ zap_attribute_t zap;
+ dmu_object_info_t doi;
+ znode_t *zp;
+ int error;
+
+ /*
+ * Interate over the contents of the unlinked set.
+ */
+ for (zap_cursor_init(&zc, zsb->z_os, zsb->z_unlinkedobj);
+ zap_cursor_retrieve(&zc, &zap) == 0;
+ zap_cursor_advance(&zc)) {
+
+ /*
+ * See what kind of object we have in list
+ */
+
+ error = dmu_object_info(zsb->z_os, zap.za_first_integer, &doi);
+ if (error != 0)
+ continue;
+
+ ASSERT((doi.doi_type == DMU_OT_PLAIN_FILE_CONTENTS) ||
+ (doi.doi_type == DMU_OT_DIRECTORY_CONTENTS));
+ /*
+ * We need to re-mark these list entries for deletion,
+ * so we pull them back into core and set zp->z_unlinked.
+ */
+ error = zfs_zget(zsb, zap.za_first_integer, &zp);
+
+ /*
+ * We may pick up znodes that are already marked for deletion.
+ * This could happen during the purge of an extended attribute
+ * directory. All we need to do is skip over them, since they
+ * are already in the system marked z_unlinked.
+ */
+ if (error != 0)
+ continue;
+
+ zp->z_unlinked = B_TRUE;
+
+ /*
+ * If this is an attribute directory, purge its contents.
+ */
+ if (S_ISDIR(ZTOI(zp)->i_mode) && (zp->z_pflags & ZFS_XATTR)) {
+ /*
+ * We don't need to check the return value of
+ * zfs_purgedir here, because zfs_rmnode will just
+ * return this xattr directory to the unlinked set
+ * until all of its xattrs are gone.
+ */
+ (void) zfs_purgedir(zp);
+ }
+
+ iput(ZTOI(zp));
+ }
+ zap_cursor_fini(&zc);
+}
+