diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/fld/fld_internal.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/fld/fld_internal.h | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/drivers/staging/lustre/lustre/fld/fld_internal.h b/drivers/staging/lustre/lustre/fld/fld_internal.h deleted file mode 100644 index e1d6aaa5c2b4..000000000000 --- a/drivers/staging/lustre/lustre/fld/fld_internal.h +++ /dev/null @@ -1,170 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2012, 2015, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * lustre/fld/fld_internal.h - * - * Subsystem Description: - * FLD is FID Location Database, which stores where (IE, on which MDT) - * FIDs are located. - * The database is basically a record file, each record consists of a FID - * sequence range, MDT/OST index, and flags. The FLD for the whole FS - * is only stored on the sequence controller(MDT0) right now, but each target - * also has its local FLD, which only stores the local sequence. - * - * The FLD subsystem usually has two tasks: - * 1. maintain the database, i.e. when the sequence controller allocates - * new sequence ranges to some nodes, it will call the FLD API to insert the - * location information <sequence_range, node_index> in FLDB. - * - * 2. Handle requests from other nodes, i.e. if client needs to know where - * the FID is located, if it can not find the information in the local cache, - * it will send a FLD lookup RPC to the FLD service, and the FLD service will - * look up the FLDB entry and return the location information to client. - * - * - * Author: Yury Umanets <umka@clusterfs.com> - * Author: Tom WangDi <wangdi@clusterfs.com> - */ -#ifndef __FLD_INTERNAL_H -#define __FLD_INTERNAL_H - -#include <uapi/linux/lustre/lustre_idl.h> - -#include <lustre_req_layout.h> -#include <lustre_fld.h> - -struct fld_stats { - __u64 fst_count; - __u64 fst_cache; - __u64 fst_inflight; -}; - -struct lu_fld_hash { - const char *fh_name; - int (*fh_hash_func)(struct lu_client_fld *, __u64); - struct lu_fld_target *(*fh_scan_func)(struct lu_client_fld *, __u64); -}; - -struct fld_cache_entry { - struct list_head fce_lru; - struct list_head fce_list; - /** fld cache entries are sorted on range->lsr_start field. */ - struct lu_seq_range fce_range; -}; - -struct fld_cache { - /** - * Cache guard, protects fci_hash mostly because others immutable after - * init is finished. - */ - rwlock_t fci_lock; - - /** Cache shrink threshold */ - int fci_threshold; - - /** Preferred number of cached entries */ - int fci_cache_size; - - /** Current number of cached entries. Protected by \a fci_lock */ - int fci_cache_count; - - /** LRU list fld entries. */ - struct list_head fci_lru; - - /** sorted fld entries. */ - struct list_head fci_entries_head; - - /** Cache statistics. */ - struct fld_stats fci_stat; - - /** Cache name used for debug and messages. */ - char fci_name[LUSTRE_MDT_MAXNAMELEN]; - unsigned int fci_no_shrink:1; -}; - -enum { - /* 4M of FLD cache will not hurt client a lot. */ - FLD_SERVER_CACHE_SIZE = (4 * 0x100000), - - /* 1M of FLD cache will not hurt client a lot. */ - FLD_CLIENT_CACHE_SIZE = (1 * 0x100000) -}; - -enum { - /* Cache threshold is 10 percent of size. */ - FLD_SERVER_CACHE_THRESHOLD = 10, - - /* Cache threshold is 10 percent of size. */ - FLD_CLIENT_CACHE_THRESHOLD = 10 -}; - -extern struct lu_fld_hash fld_hash[]; - -int fld_client_rpc(struct obd_export *exp, - struct lu_seq_range *range, __u32 fld_op, - struct ptlrpc_request **reqp); - -extern struct lprocfs_vars fld_client_debugfs_list[]; - -struct fld_cache *fld_cache_init(const char *name, - int cache_size, int cache_threshold); - -void fld_cache_fini(struct fld_cache *cache); - -void fld_cache_flush(struct fld_cache *cache); - -int fld_cache_insert(struct fld_cache *cache, - const struct lu_seq_range *range); - -struct fld_cache_entry -*fld_cache_entry_create(const struct lu_seq_range *range); - -int fld_cache_lookup(struct fld_cache *cache, - const u64 seq, struct lu_seq_range *range); - -struct fld_cache_entry* -fld_cache_entry_lookup(struct fld_cache *cache, struct lu_seq_range *range); - -struct fld_cache_entry -*fld_cache_entry_lookup_nolock(struct fld_cache *cache, - struct lu_seq_range *range); - -static inline const char * -fld_target_name(struct lu_fld_target *tar) -{ - if (tar->ft_srv) - return tar->ft_srv->lsf_name; - - return (const char *)tar->ft_exp->exp_obd->obd_name; -} - -#endif /* __FLD_INTERNAL_H */ |