195 Need replacement for nfs/lockd+klm
Reviewed by: Gordon Ross <gordon.ross@nexenta.com>
Reviewed by: Jeremy Jones <jeremy@delphix.com>
Reviewed by: Jeff Biseda <jbiseda@delphix.com>

@@ -25,10 +25,14 @@
  */
 
 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
 /*      All Rights Reserved */
 
+/*
+ * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ */
+
 #include <sys/flock_impl.h>
 #include <sys/vfs.h>
 #include <sys/t_lock.h>         /* for <sys/callb.h> */
 #include <sys/callb.h>
 #include <sys/clconf.h>

@@ -2277,10 +2281,61 @@
         if (lock) {
                 while (lock->l_vnode == vp) {
                         if (IS_REMOTE(lock)) {
                                 result = 1;
                                 goto done;
+                        }
+                        lock = lock->l_next;
+                }
+        }
+
+done:
+        mutex_exit(&gp->gp_mutex);
+        return (result);
+}
+
+/*
+ * Determine whether there are any locks for the given vnode with a remote
+ * sysid matching given sysid.
+ * Used by the new (open source) NFS Lock Manager (NLM)
+ */
+int
+flk_has_remote_locks_for_sysid(vnode_t *vp, int sysid)
+{
+        lock_descriptor_t *lock;
+        int result = 0;
+        graph_t *gp;
+
+        if (sysid == 0)
+                return (0);
+
+        gp = flk_get_lock_graph(vp, FLK_USE_GRAPH);
+        if (gp == NULL) {
+                return (0);
+        }
+
+        mutex_enter(&gp->gp_mutex);
+
+        SET_LOCK_TO_FIRST_ACTIVE_VP(gp, lock, vp);
+
+        if (lock) {
+                while (lock->l_vnode == vp) {
+                        if (lock->l_flock.l_sysid == sysid) {
+                                result = 1;
+                                goto done;
+                        }
+                        lock = lock->l_next;
+                }
+        }
+
+        SET_LOCK_TO_FIRST_SLEEP_VP(gp, lock, vp);
+
+        if (lock) {
+                while (lock->l_vnode == vp) {
+                        if (lock->l_flock.l_sysid == sysid) {
+                                result = 1;
+                                goto done;
                         }
                         lock = lock->l_next;
                 }
         }