/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#define DEBUG_SUBSYSTEM S_LLITE
-#ifndef __KERNEL__
-# error This file is kernel only.
-#endif
-
-#include <obd.h>
-#include <lustre_lite.h>
-
+#include <obd_support.h>
#include "vvp_internal.h"
/*****************************************************************************
*
*/
-/**
- * Estimates lock value for the purpose of managing the lock cache during
- * memory shortages.
- *
- * Locks for memory mapped files are almost infinitely precious, others are
- * junk. "Mapped locks" are heavy, but not infinitely heavy, so that they are
- * ordered within themselves by weights assigned from other layers.
- */
-static unsigned long vvp_lock_weigh(const struct lu_env *env,
- const struct cl_lock_slice *slice)
+static void vvp_lock_fini(const struct lu_env *env, struct cl_lock_slice *slice)
+{
+ struct vvp_lock *vlk = cl2vvp_lock(slice);
+
+ OBD_SLAB_FREE_PTR(vlk, vvp_lock_kmem);
+}
+
+static int vvp_lock_enqueue(const struct lu_env *env,
+ const struct cl_lock_slice *slice,
+ struct cl_io *unused, struct cl_sync_io *anchor)
{
- struct ccc_object *cob = cl2ccc(slice->cls_obj);
+ CLOBINVRNT(env, slice->cls_obj, vvp_object_invariant(slice->cls_obj));
- ENTRY;
- RETURN(atomic_read(&cob->cob_mmap_cnt) > 0 ? ~0UL >> 2 : 0);
+ return 0;
}
static const struct cl_lock_operations vvp_lock_ops = {
- .clo_delete = ccc_lock_delete,
- .clo_fini = ccc_lock_fini,
- .clo_enqueue = ccc_lock_enqueue,
- .clo_wait = ccc_lock_wait,
- .clo_unuse = ccc_lock_unuse,
- .clo_fits_into = ccc_lock_fits_into,
- .clo_state = ccc_lock_state,
- .clo_weigh = vvp_lock_weigh
+ .clo_fini = vvp_lock_fini,
+ .clo_enqueue = vvp_lock_enqueue,
};
int vvp_lock_init(const struct lu_env *env, struct cl_object *obj,
- struct cl_lock *lock, const struct cl_io *io)
+ struct cl_lock *lock, const struct cl_io *unused)
{
- return ccc_lock_init(env, obj, lock, io, &vvp_lock_ops);
+ struct vvp_lock *vlk;
+ int result;
+
+ CLOBINVRNT(env, obj, vvp_object_invariant(obj));
+
+ OBD_SLAB_ALLOC_PTR_GFP(vlk, vvp_lock_kmem, GFP_NOFS);
+ if (vlk != NULL) {
+ cl_lock_slice_add(lock, &vlk->vlk_cl, obj, &vvp_lock_ops);
+ result = 0;
+ } else {
+ result = -ENOMEM;
+ }
+
+ return result;
}