| /* |
| * 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, 2013, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| */ |
| |
| #ifndef __LINUX_FLD_H |
| #define __LINUX_FLD_H |
| |
| /** \defgroup fld fld |
| * |
| * @{ |
| */ |
| |
| #include "lustre/lustre_idl.h" |
| #include "../../include/linux/libcfs/libcfs.h" |
| |
| struct lu_client_fld; |
| struct lu_server_fld; |
| struct lu_fld_hash; |
| struct fld_cache; |
| |
| extern const struct dt_index_features fld_index_features; |
| extern const char fld_index_name[]; |
| |
| /* |
| * FLD (Fid Location Database) interface. |
| */ |
| enum { |
| LUSTRE_CLI_FLD_HASH_DHT = 0, |
| LUSTRE_CLI_FLD_HASH_RRB |
| }; |
| |
| |
| struct lu_fld_target { |
| struct list_head ft_chain; |
| struct obd_export *ft_exp; |
| struct lu_server_fld *ft_srv; |
| __u64 ft_idx; |
| }; |
| |
| struct lu_server_fld { |
| /** |
| * Fld dir proc entry. */ |
| struct proc_dir_entry *lsf_proc_dir; |
| |
| /** |
| * /fld file object device */ |
| struct dt_object *lsf_obj; |
| |
| /** |
| * super sequence controller export, needed to forward fld |
| * lookup request. */ |
| struct obd_export *lsf_control_exp; |
| |
| /** |
| * Client FLD cache. */ |
| struct fld_cache *lsf_cache; |
| |
| /** |
| * Protect index modifications */ |
| struct mutex lsf_lock; |
| |
| /** |
| * Fld service name in form "fld-srv-lustre-MDTXXX" */ |
| char lsf_name[80]; |
| |
| }; |
| |
| struct lu_client_fld { |
| /** |
| * Client side proc entry. */ |
| struct proc_dir_entry *lcf_proc_dir; |
| |
| /** |
| * List of exports client FLD knows about. */ |
| struct list_head lcf_targets; |
| |
| /** |
| * Current hash to be used to chose an export. */ |
| struct lu_fld_hash *lcf_hash; |
| |
| /** |
| * Exports count. */ |
| int lcf_count; |
| |
| /** |
| * Lock protecting exports list and fld_hash. */ |
| spinlock_t lcf_lock; |
| |
| /** |
| * Client FLD cache. */ |
| struct fld_cache *lcf_cache; |
| |
| /** |
| * Client fld proc entry name. */ |
| char lcf_name[80]; |
| |
| int lcf_flags; |
| }; |
| |
| /* Client methods */ |
| int fld_client_init(struct lu_client_fld *fld, |
| const char *prefix, int hash); |
| |
| void fld_client_fini(struct lu_client_fld *fld); |
| |
| void fld_client_flush(struct lu_client_fld *fld); |
| |
| int fld_client_lookup(struct lu_client_fld *fld, u64 seq, u32 *mds, |
| __u32 flags, const struct lu_env *env); |
| |
| int fld_client_create(struct lu_client_fld *fld, |
| struct lu_seq_range *range, |
| const struct lu_env *env); |
| |
| int fld_client_delete(struct lu_client_fld *fld, u64 seq, |
| const struct lu_env *env); |
| |
| int fld_client_add_target(struct lu_client_fld *fld, |
| struct lu_fld_target *tar); |
| |
| int fld_client_del_target(struct lu_client_fld *fld, |
| __u64 idx); |
| |
| void fld_client_proc_fini(struct lu_client_fld *fld); |
| |
| /** @} fld */ |
| |
| #endif |