diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/cl_internal.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/cl_internal.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_internal.h b/drivers/staging/lustre/lustre/obdclass/cl_internal.h new file mode 100644 index 000000000000..7eb0ad7b3644 --- /dev/null +++ b/drivers/staging/lustre/lustre/obdclass/cl_internal.h @@ -0,0 +1,121 @@ +/* + * 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 */ |