4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
40 /** \defgroup lite lite
45 #if defined(__linux__)
46 #include <linux/lustre_lite.h>
48 #error Unsupported operating system.
51 #include <obd_class.h>
52 #include <lustre_net.h>
53 #include <lustre_ha.h>
55 /* 4UL * 1024 * 1024 */
56 #define LL_MAX_BLKSIZE_BITS (22)
57 #define LL_MAX_BLKSIZE (1UL<<LL_MAX_BLKSIZE_BITS)
59 #include <lustre/lustre_user.h>
62 struct lustre_rw_params {
64 ldlm_policy_data_t lrp_policy;
65 obd_flag lrp_brw_flags;
70 * XXX nikita: this function lives in the header because it is used by both
71 * llite kernel module and liblustre library, and there is no (?) better place
74 static inline void lustre_build_lock_params(int cmd, unsigned long open_flags,
76 loff_t pos, ssize_t len,
77 struct lustre_rw_params *params)
79 params->lrp_lock_mode = (cmd == OBD_BRW_READ) ? LCK_PR : LCK_PW;
80 params->lrp_brw_flags = 0;
82 params->lrp_policy.l_extent.start = pos;
83 params->lrp_policy.l_extent.end = pos + len - 1;
85 * for now O_APPEND always takes local locks.
87 if (cmd == OBD_BRW_WRITE && (open_flags & O_APPEND)) {
88 params->lrp_policy.l_extent.start = 0;
89 params->lrp_policy.l_extent.end = OBD_OBJECT_EOF;
90 } else if (LIBLUSTRE_CLIENT && (connect_flags & OBD_CONNECT_SRVLOCK)) {
92 * liblustre: OST-side locking for all non-O_APPEND
95 params->lrp_lock_mode = LCK_NL;
96 params->lrp_brw_flags = OBD_BRW_SRVLOCK;
99 * nothing special for the kernel. In the future llite may use
100 * OST-side locks for small writes into highly contended
104 params->lrp_ast_flags = (open_flags & O_NONBLOCK) ?
105 LDLM_FL_BLOCK_NOWAIT : 0;
109 * This is embedded into liblustre and llite super-blocks to keep track of
110 * connect flags (capabilities) supported by all imports given mount is
113 struct lustre_client_ocd {
115 * This is conjunction of connect_flags across all imports (LOVs) this
116 * mount is connected to. This field is updated by cl_ocd_update()
120 struct mutex lco_lock;
121 struct obd_export *lco_md_exp;
122 struct obd_export *lco_dt_exp;
126 * Chain of hash overflow pages.
128 struct ll_dir_chain {
129 /* XXX something. Later */
132 static inline void ll_dir_chain_init(struct ll_dir_chain *chain)
136 static inline void ll_dir_chain_fini(struct ll_dir_chain *chain)