Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / lustre / lustre / obdclass / cl_internal.h

diff --git a/kernel/drivers/staging/lustre/lustre/obdclass/cl_internal.h b/kernel/drivers/staging/lustre/lustre/obdclass/cl_internal.h
new file mode 100644 (file)
index 0000000..7eb0ad7
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+++ b/kernel/drivers/staging/lustre/lustre/obdclass/cl_internal.h
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+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * Internal cl interfaces.
+ *
+ *   Author: Nikita Danilov <nikita.danilov@sun.com>
+ */
+#ifndef _CL_INTERNAL_H
+#define _CL_INTERNAL_H
+
+#define CLT_PVEC_SIZE (14)
+
+/**
+ * Possible levels of the nesting. Currently this is 2: there are "top"
+ * entities (files, extent locks), and "sub" entities (stripes and stripe
+ * locks). This is used only for debugging counters right now.
+ */
+enum clt_nesting_level {
+       CNL_TOP,
+       CNL_SUB,
+       CNL_NR
+};
+
+/**
+ * Counters used to check correctness of cl_lock interface usage.
+ */
+struct cl_thread_counters {
+       /**
+        * Number of outstanding calls to cl_lock_mutex_get() made by the
+        * current thread. For debugging.
+        */
+       int        ctc_nr_locks_locked;
+       /** List of locked locks. */
+       struct lu_ref ctc_locks_locked;
+       /** Number of outstanding holds on locks. */
+       int        ctc_nr_held;
+       /** Number of outstanding uses on locks. */
+       int        ctc_nr_used;
+       /** Number of held extent locks. */
+       int        ctc_nr_locks_acquired;
+};
+
+/**
+ * Thread local state internal for generic cl-code.
+ */
+struct cl_thread_info {
+       /*
+        * Common fields.
+        */
+       struct cl_io     clt_io;
+       struct cl_2queue     clt_queue;
+
+       /*
+        * Fields used by cl_lock.c
+        */
+       struct cl_lock_descr clt_descr;
+       struct cl_page_list  clt_list;
+       /**
+        * Counters for every level of lock nesting.
+        */
+       struct cl_thread_counters clt_counters[CNL_NR];
+       /** @} debugging */
+
+       /*
+        * Fields used by cl_page.c
+        */
+       struct cl_page      *clt_pvec[CLT_PVEC_SIZE];
+
+       /*
+        * Fields used by cl_io.c
+        */
+       /**
+        * Pointer to the topmost ongoing IO in this thread.
+        */
+       struct cl_io    *clt_current_io;
+       /**
+        * Used for submitting a sync io.
+        */
+       struct cl_sync_io    clt_anchor;
+       /**
+        * Fields used by cl_lock_discard_pages().
+        */
+       pgoff_t       clt_next_index;
+       pgoff_t       clt_fn_index; /* first non-overlapped index */
+};
+
+struct cl_thread_info *cl_env_info(const struct lu_env *env);
+
+#endif /* _CL_INTERNAL_H */