| /* |
| * 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) 2007, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2011, 2012, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| */ |
| |
| #ifndef _LL_H |
| #define _LL_H |
| |
| /** \defgroup lite lite |
| * |
| * @{ |
| */ |
| |
| #include <linux/lustre_lite.h> |
| |
| #include <obd_class.h> |
| #include <obd_ost.h> |
| #include <lustre_net.h> |
| #include <lustre_mds.h> |
| #include <lustre_ha.h> |
| |
| /* 4UL * 1024 * 1024 */ |
| #define LL_MAX_BLKSIZE_BITS (22) |
| #define LL_MAX_BLKSIZE (1UL<<LL_MAX_BLKSIZE_BITS) |
| |
| #include <lustre/lustre_user.h> |
| |
| |
| struct lustre_rw_params { |
| int lrp_lock_mode; |
| ldlm_policy_data_t lrp_policy; |
| obd_flag lrp_brw_flags; |
| int lrp_ast_flags; |
| }; |
| |
| /* |
| * XXX nikita: this function lives in the header because it is used by both |
| * llite kernel module and liblustre library, and there is no (?) better place |
| * to put it in. |
| */ |
| static inline void lustre_build_lock_params(int cmd, unsigned long open_flags, |
| __u64 connect_flags, |
| loff_t pos, ssize_t len, |
| struct lustre_rw_params *params) |
| { |
| params->lrp_lock_mode = (cmd == OBD_BRW_READ) ? LCK_PR : LCK_PW; |
| params->lrp_brw_flags = 0; |
| |
| params->lrp_policy.l_extent.start = pos; |
| params->lrp_policy.l_extent.end = pos + len - 1; |
| /* |
| * for now O_APPEND always takes local locks. |
| */ |
| if (cmd == OBD_BRW_WRITE && (open_flags & O_APPEND)) { |
| params->lrp_policy.l_extent.start = 0; |
| params->lrp_policy.l_extent.end = OBD_OBJECT_EOF; |
| } else if (LIBLUSTRE_CLIENT && (connect_flags & OBD_CONNECT_SRVLOCK)) { |
| /* |
| * liblustre: OST-side locking for all non-O_APPEND |
| * reads/writes. |
| */ |
| params->lrp_lock_mode = LCK_NL; |
| params->lrp_brw_flags = OBD_BRW_SRVLOCK; |
| } else { |
| /* |
| * nothing special for the kernel. In the future llite may use |
| * OST-side locks for small writes into highly contended |
| * files. |
| */ |
| } |
| params->lrp_ast_flags = (open_flags & O_NONBLOCK) ? |
| LDLM_FL_BLOCK_NOWAIT : 0; |
| } |
| |
| /* |
| * This is embedded into liblustre and llite super-blocks to keep track of |
| * connect flags (capabilities) supported by all imports given mount is |
| * connected to. |
| */ |
| struct lustre_client_ocd { |
| /* |
| * This is conjunction of connect_flags across all imports (LOVs) this |
| * mount is connected to. This field is updated by cl_ocd_update() |
| * under ->lco_lock. |
| */ |
| __u64 lco_flags; |
| struct mutex lco_lock; |
| struct obd_export *lco_md_exp; |
| struct obd_export *lco_dt_exp; |
| }; |
| |
| /* |
| * Chain of hash overflow pages. |
| */ |
| struct ll_dir_chain { |
| /* XXX something. Later */ |
| }; |
| |
| static inline void ll_dir_chain_init(struct ll_dir_chain *chain) |
| { |
| } |
| |
| static inline void ll_dir_chain_fini(struct ll_dir_chain *chain) |
| { |
| } |
| |
| static inline unsigned long hash_x_index(__u64 hash, int hash64) |
| { |
| if (BITS_PER_LONG == 32 && hash64) |
| hash >>= 32; |
| /* save hash 0 as index 0 because otherwise we'll save it at |
| * page index end (~0UL) and it causes truncate_inode_pages_range() |
| * to loop forever. |
| */ |
| return ~0UL - (hash + !hash); |
| } |
| |
| /** @} lite */ |
| |
| #endif |