diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/fld/fld_internal.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/fld/fld_internal.h | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/fld/fld_internal.h b/drivers/staging/lustre/lustre/fld/fld_internal.h new file mode 100644 index 000000000000..9fa9e01cdb67 --- /dev/null +++ b/drivers/staging/lustre/lustre/fld/fld_internal.h @@ -0,0 +1,223 @@ +/* + * 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) 2012, 2013, 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 + * + * Author: Yury Umanets <umka@clusterfs.com> + * Author: Tom WangDi <wangdi@clusterfs.com> + */ +#ifndef __FLD_INTERNAL_H +#define __FLD_INTERNAL_H + +#include <lustre/lustre_idl.h> +#include <dt_object.h> + +#include <linux/libcfs/libcfs.h> +#include <lustre_req_layout.h> +#include <lustre_fld.h> + +enum { + LUSTRE_FLD_INIT = 1 << 0, + LUSTRE_FLD_RUN = 1 << 1 +}; + +struct fld_stats { + __u64 fst_count; + __u64 fst_cache; + __u64 fst_inflight; +}; + +typedef int (*fld_hash_func_t) (struct lu_client_fld *, __u64); + +typedef struct lu_fld_target * +(*fld_scan_func_t) (struct lu_client_fld *, __u64); + +struct lu_fld_hash { + const char *fh_name; + fld_hash_func_t fh_hash_func; + fld_scan_func_t fh_scan_func; +}; + +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; + + /** + * Prefered 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[80]; + unsigned int fci_no_shrink:1; +}; + +enum fld_op { + FLD_CREATE = 0, + FLD_DELETE = 1, + FLD_LOOKUP = 2 +}; + +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[]; + + +struct fld_thread_info { + struct req_capsule *fti_pill; + __u64 fti_key; + struct lu_seq_range fti_rec; + struct lu_seq_range fti_lrange; + struct lu_seq_range fti_irange; +}; + +extern struct lu_context_key fld_thread_key; + +int fld_index_init(const struct lu_env *env, struct lu_server_fld *fld, + struct dt_device *dt); + +void fld_index_fini(const struct lu_env *env, struct lu_server_fld *fld); + +int fld_declare_index_create(const struct lu_env *env, + struct lu_server_fld *fld, + const struct lu_seq_range *new, + struct thandle *th); + +int fld_index_create(const struct lu_env *env, struct lu_server_fld *fld, + const struct lu_seq_range *new, struct thandle *th); + +int fld_index_lookup(const struct lu_env *env, struct lu_server_fld *fld, + seqno_t seq, struct lu_seq_range *range); + +int fld_client_rpc(struct obd_export *exp, + struct lu_seq_range *range, __u32 fld_op); + +#ifdef LPROCFS +extern struct lprocfs_vars fld_server_proc_list[]; +extern struct lprocfs_vars fld_client_proc_list[]; +#endif + + +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_insert_nolock(struct fld_cache *cache, + struct fld_cache_entry *f_new); +void fld_cache_delete(struct fld_cache *cache, + const struct lu_seq_range *range); +void fld_cache_delete_nolock(struct fld_cache *cache, + const struct lu_seq_range *range); +int fld_cache_lookup(struct fld_cache *cache, + const seqno_t seq, struct lu_seq_range *range); + +struct fld_cache_entry* +fld_cache_entry_lookup(struct fld_cache *cache, struct lu_seq_range *range); +void fld_cache_entry_delete(struct fld_cache *cache, + struct fld_cache_entry *node); +void fld_dump_cache_entries(struct fld_cache *cache); + +struct fld_cache_entry +*fld_cache_entry_lookup_nolock(struct fld_cache *cache, + struct lu_seq_range *range); +int fld_write_range(const struct lu_env *env, struct dt_object *dt, + const struct lu_seq_range *range, struct thandle *th); + +static inline const char * +fld_target_name(struct lu_fld_target *tar) +{ + if (tar->ft_srv != NULL) + return tar->ft_srv->lsf_name; + + return (const char *)tar->ft_exp->exp_obd->obd_name; +} + +extern proc_dir_entry_t *fld_type_proc_dir; +extern struct file_operations fld_proc_seq_fops; +#endif /* __FLD_INTERNAL_H */ |