4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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7 * it under the terms of the GNU General Public License version 2 only,
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
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32 * Internal cl interfaces.
34 * Author: Nikita Danilov <nikita.danilov@sun.com>
36 #ifndef _CL_INTERNAL_H
37 #define _CL_INTERNAL_H
39 #define CLT_PVEC_SIZE (14)
42 * Possible levels of the nesting. Currently this is 2: there are "top"
43 * entities (files, extent locks), and "sub" entities (stripes and stripe
44 * locks). This is used only for debugging counters right now.
46 enum clt_nesting_level {
53 * Counters used to check correctness of cl_lock interface usage.
55 struct cl_thread_counters {
57 * Number of outstanding calls to cl_lock_mutex_get() made by the
58 * current thread. For debugging.
60 int ctc_nr_locks_locked;
61 /** List of locked locks. */
62 struct lu_ref ctc_locks_locked;
63 /** Number of outstanding holds on locks. */
65 /** Number of outstanding uses on locks. */
67 /** Number of held extent locks. */
68 int ctc_nr_locks_acquired;
72 * Thread local state internal for generic cl-code.
74 struct cl_thread_info {
79 struct cl_2queue clt_queue;
82 * Fields used by cl_lock.c
84 struct cl_lock_descr clt_descr;
85 struct cl_page_list clt_list;
87 * Counters for every level of lock nesting.
89 struct cl_thread_counters clt_counters[CNL_NR];
93 * Fields used by cl_page.c
95 struct cl_page *clt_pvec[CLT_PVEC_SIZE];
98 * Fields used by cl_io.c
101 * Pointer to the topmost ongoing IO in this thread.
103 struct cl_io *clt_current_io;
105 * Used for submitting a sync io.
107 struct cl_sync_io clt_anchor;
109 * Fields used by cl_lock_discard_pages().
111 pgoff_t clt_next_index;
112 pgoff_t clt_fn_index; /* first non-overlapped index */
115 struct cl_thread_info *cl_env_info(const struct lu_env *env);
117 #endif /* _CL_INTERNAL_H */