X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Finclude%2Flustre_fld.h;h=3d8288b7da89ab5984f4fe264814f1c1fbf7cc69;hb=refs%2Fchanges%2F38%2F37738%2F5;hp=9c8ea302bb6c74868453ad3a6202da5c6380191a;hpb=70e80ade90af09300396706b8910e196a7928520;p=fs%2Flustre-release.git diff --git a/lustre/include/lustre_fld.h b/lustre/include/lustre_fld.h index 9c8ea30..3d8288b 100644 --- a/lustre/include/lustre_fld.h +++ b/lustre/include/lustre_fld.h @@ -1,6 +1,4 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: - * +/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. @@ -16,18 +14,16 @@ * 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 [sun.com URL with a - * copy of GPLv2]. - * - * 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. + * version 2 along with this program; If not, see + * http://www.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ /* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved + * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. + * + * Copyright (c) 2011, 2015, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -37,20 +33,24 @@ #ifndef __LINUX_FLD_H #define __LINUX_FLD_H -#include -#include -#include +/** \defgroup fld fld + * + * @{ + */ +#include #include +#include +#include +struct lu_env; struct lu_client_fld; struct lu_server_fld; - -struct fld_stats { - __u64 fst_count; - __u64 fst_cache; - __u64 fst_inflight; -}; +struct lu_fld_hash; +struct fld_cache; +struct thandle; +struct dt_device; +struct dt_object; /* * FLD (Fid Location Database) interface. @@ -60,143 +60,115 @@ enum { LUSTRE_CLI_FLD_HASH_RRB }; -struct lu_server_fld; - struct lu_fld_target { - struct list_head ft_chain; - struct obd_export *ft_exp; - struct lu_server_fld *ft_srv; - __u64 ft_idx; -}; - -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 hlist_node fce_list; - struct list_head fce_lru; - mdsno_t fce_mds; - seqno_t fce_seq; - cfs_waitq_t fce_waitq; - __u32 fce_inflight:1, - fce_invalid:1; -}; - -struct fld_cache { - /* - * Cache guard, protects fci_hash mostly because others immutable after - * init is finished. - */ - spinlock_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 @fci_lock */ - int fci_cache_count; - - /* Hash table size (number of collision lists) */ - int fci_hash_size; - - /* Hash table mask */ - int fci_hash_mask; - - /* Hash table for all collision lists */ - struct hlist_head *fci_hash_table; - - /* Lru list */ - struct list_head fci_lru; - - /* Cache statistics. */ - struct fld_stats fci_stat; - - /* Cache name used for debug and messages. */ - char fci_name[80]; + 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. */ - cfs_proc_dir_entry_t *lsf_proc_dir; + /** + * Fld dir debugfs entry. + */ + struct dentry *lsf_debugfs_entry; - /* /fld file object device */ + /** + * /fld file object device */ struct dt_object *lsf_obj; - /* Client FLD cache. */ + /** + * 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 semaphore lsf_sem; + /** + * Protect index modifications */ + struct mutex lsf_lock; - /* Fld service name in form "fld-srv-lustre-MDTXXX" */ - char lsf_name[80]; -}; + /** + * Fld service name in form "fld-srv-lustre-MDTXXX" + */ + char lsf_name[LUSTRE_MDT_MAXNAMELEN]; + + int (*lsf_seq_lookup)(const struct lu_env *env, + struct lu_server_fld *fld, u64 seq, + struct lu_seq_range *range); + + /** + * Just reformatted or upgraded, and this flag is being + * used to check whether the local FLDB is needs to be + * synced with global FLDB(in MDT0), and it is only needed + * if the MDT is upgraded from < 2.6 to 2.6, i.e. when the + * local FLDB is being invited */ + unsigned int lsf_new:1; -enum { - LUSTRE_FLD_INIT = 1 << 0, - LUSTRE_FLD_RUN = 1 << 1 }; struct lu_client_fld { - /* Client side proc entry. */ - cfs_proc_dir_entry_t *lcf_proc_dir; + /** + * Client side debugfs entry. + */ + struct dentry *lcf_debugfs_entry; - /* List of exports client FLD knows about. */ - struct list_head lcf_targets; + /** + * List of exports client FLD knows about. */ + struct list_head lcf_targets; - /* Current hash to be used to chose an export. */ + /** + * Current hash to be used to chose an export. */ struct lu_fld_hash *lcf_hash; - /* Exports count. */ + /** + * Exports count. */ int lcf_count; - /* Lock protecting exports list and fld_hash. */ - spinlock_t lcf_lock; + /** + * Lock protecting exports list and fld_hash. */ + spinlock_t lcf_lock; - /* Client FLD cache. */ + /** + * Client FLD cache. */ struct fld_cache *lcf_cache; - /* Client fld proc entry name. */ - char lcf_name[80]; - - const struct lu_context *lcf_ctx; - - int lcf_flags; + /** + * Client fld debugfs entry name. + */ + char lcf_name[LUSTRE_MDT_MAXNAMELEN]; }; -int fld_query(struct com_thread_info *info); - /* Server methods */ -int fld_server_init(struct lu_server_fld *fld, - struct dt_device *dt, - const char *prefix, - const struct lu_env *env); +int fld_server_init(const struct lu_env *env, struct lu_server_fld *fld, + struct dt_device *dt, const char *prefix, int type); + +void fld_server_fini(const struct lu_env *env, struct lu_server_fld *fld); + +int fld_declare_server_create(const struct lu_env *env, + struct lu_server_fld *fld, + const struct lu_seq_range *range, + struct thandle *th); -void fld_server_fini(struct lu_server_fld *fld, - const struct lu_env *env); +int fld_server_create(const struct lu_env *env, + struct lu_server_fld *fld, + const struct lu_seq_range *add_range, + struct thandle *th); -int fld_server_create(struct lu_server_fld *fld, - const struct lu_env *env, - seqno_t seq, mdsno_t mds); +int fld_insert_entry(const struct lu_env *env, + struct lu_server_fld *fld, + const struct lu_seq_range *range); -int fld_server_delete(struct lu_server_fld *fld, - const struct lu_env *env, - seqno_t seq); +int fld_server_lookup(const struct lu_env *env, struct lu_server_fld *fld, + u64 seq, struct lu_seq_range *range); -int fld_server_lookup(struct lu_server_fld *fld, - const struct lu_env *env, - seqno_t seq, mdsno_t *mds); +int fld_local_lookup(const struct lu_env *env, struct lu_server_fld *fld, + u64 seq, struct lu_seq_range *range); + +int fld_update_from_controller(const struct lu_env *env, + struct lu_server_fld *fld); /* Client methods */ int fld_client_init(struct lu_client_fld *fld, @@ -206,16 +178,14 @@ 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, - seqno_t seq, mdsno_t *mds, - const struct lu_env *env); +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, - seqno_t seq, mdsno_t mds, + struct lu_seq_range *range, const struct lu_env *env); -int fld_client_delete(struct lu_client_fld *fld, - seqno_t seq, +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, @@ -224,27 +194,8 @@ int fld_client_add_target(struct lu_client_fld *fld, int fld_client_del_target(struct lu_client_fld *fld, __u64 idx); -/* Cache methods */ -struct fld_cache *fld_cache_init(const char *name, - int hash_size, - 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, - seqno_t seq, mdsno_t mds); - -int fld_cache_insert_inflight(struct fld_cache *cache, - seqno_t seq); - -void fld_cache_delete(struct fld_cache *cache, - seqno_t seq); +void fld_client_debugfs_fini(struct lu_client_fld *fld); -int -fld_cache_lookup(struct fld_cache *cache, - seqno_t seq, mdsno_t *mds); +/** @} fld */ #endif