1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 * Internal cl interfaces.
40 * Author: Nikita Danilov <nikita.danilov@sun.com>
42 #ifndef _CL_INTERNAL_H
43 #define _CL_INTERNAL_H
45 #define CLT_PVEC_SIZE (14)
48 * Possible levels of the nesting. Currently this is 2: there are "top"
49 * entities (files, extent locks), and "sub" entities (stripes and stripe
50 * locks). This is used only for debugging counters right now.
52 enum clt_nesting_level {
59 * Counters used to check correctness of cl_lock interface usage.
61 struct cl_thread_counters {
63 * Number of outstanding calls to cl_lock_mutex_get() made by the
64 * current thread. For debugging.
66 int ctc_nr_locks_locked;
67 /** List of locked locks. */
68 struct lu_ref ctc_locks_locked;
69 /** Number of outstanding holds on locks. */
71 /** Number of outstanding uses on locks. */
73 /** Number of held extent locks. */
74 int ctc_nr_locks_acquired;
78 * Thread local state internal for generic cl-code.
80 struct cl_thread_info {
85 struct cl_2queue clt_queue;
88 * Fields used by cl_lock.c
90 struct cl_lock_descr clt_descr;
91 struct cl_page_list clt_list;
93 * Counters for every level of lock nesting.
95 struct cl_thread_counters clt_counters[CNL_NR];
99 * Fields used by cl_page.c
101 struct cl_page *clt_pvec[CLT_PVEC_SIZE];
104 * Fields used by cl_io.c
107 * Pointer to the topmost ongoing IO in this thread.
109 struct cl_io *clt_current_io;
111 * Used for submitting a sync io.
113 struct cl_sync_io clt_anchor;
115 * Fields used by cl_lock_page_out().
117 pgoff_t clt_next_index;
118 pgoff_t clt_fn_index; /* first non-overlapped index */
121 struct cl_thread_info *cl_env_info(const struct lu_env *env);
123 #endif /* _CL_INTERNAL_H */