diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/include/lustre_lite.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/include/lustre_lite.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/include/lustre_lite.h b/drivers/staging/lustre/lustre/include/lustre_lite.h new file mode 100644 index 000000000000..25f8bfaccef3 --- /dev/null +++ b/drivers/staging/lustre/lustre/include/lustre_lite.h @@ -0,0 +1,147 @@ +/* + * 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; + return ~0UL - hash; +} + +/** @} lite */ + +#endif |