X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Ffld%2Ffld_internal.h;h=5fce515ee2854af83c689031bd49a3eebb31ac08;hb=3cce65712d94cffe8f1626545845b95b88aef672;hp=554b49fe0340a6035ac61e4e92b270e6d3894709;hpb=3f3d6e175b891ddb063cd3b6a08ee1961aca72aa;p=fs%2Flustre-release.git diff --git a/lustre/fld/fld_internal.h b/lustre/fld/fld_internal.h index 554b49f..5fce515 100644 --- a/lustre/fld/fld_internal.h +++ b/lustre/fld/fld_internal.h @@ -15,11 +15,7 @@ * * 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. + * http://www.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ @@ -27,7 +23,7 @@ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * - * Copyright (c) 2012, 2013, Intel Corporation. + * Copyright (c) 2012, 2015, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -35,6 +31,24 @@ * * 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 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 * Author: Tom WangDi */ @@ -42,15 +56,9 @@ #define __FLD_INTERNAL_H #include -#include #include #include -enum { - LUSTRE_FLD_INIT = 1 << 0, - LUSTRE_FLD_RUN = 1 << 1 -}; - struct fld_stats { __u64 fst_count; __u64 fst_cache; @@ -68,11 +76,11 @@ struct lu_fld_hash { }; struct fld_cache_entry { - cfs_list_t fce_lru; - cfs_list_t fce_list; - /** - * fld cache entries are sorted on range->lsr_start field. */ - struct lu_seq_range fce_range; + 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 { @@ -96,11 +104,11 @@ struct fld_cache { /** * LRU list fld entries. */ - cfs_list_t fci_lru; + struct list_head fci_lru; /** * sorted fld entries. */ - cfs_list_t fci_entries_head; + struct list_head fci_entries_head; /** * Cache statistics. */ @@ -130,13 +138,6 @@ enum { extern struct lu_fld_hash fld_hash[]; -#ifdef __KERNEL__ - -#ifdef LPROCFS -extern struct proc_dir_entry *fld_type_proc_dir; -extern struct lprocfs_seq_vars fld_client_proc_list[]; -#endif - # ifdef HAVE_SERVER_SUPPORT struct fld_thread_info { struct lu_seq_range fti_rec; @@ -148,7 +149,7 @@ extern struct lu_context_key fld_thread_key; struct dt_device; int fld_index_init(const struct lu_env *env, struct lu_server_fld *fld, - struct dt_device *dt); + struct dt_device *dt, int type); void fld_index_fini(const struct lu_env *env, struct lu_server_fld *fld); @@ -161,26 +162,26 @@ int fld_index_create(const struct lu_env *env, struct lu_server_fld *fld, const struct lu_seq_range *new_range, 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); + u64 seq, struct lu_seq_range *range); int fld_name_to_index(const char *name, __u32 *index); -int fld_server_mod_init(void); +int fld_server_mod_init(void); void fld_server_mod_exit(void); int fld_server_read(const struct lu_env *env, struct lu_server_fld *fld, struct lu_seq_range *range, void *data, int data_len); -#ifdef LPROCFS -extern const struct file_operations fld_proc_seq_fops; -extern struct lprocfs_seq_vars fld_server_proc_list[]; -#endif + +extern const struct file_operations fld_debugfs_seq_fops; +extern struct dentry *fld_debugfs_dir; # endif /* HAVE_SERVER_SUPPORT */ int fld_client_rpc(struct obd_export *exp, struct lu_seq_range *range, __u32 fld_op, struct ptlrpc_request **reqp); -#endif /* __KERNEL__ */ + +extern struct lprocfs_vars fld_client_debugfs_list[]; struct fld_cache *fld_cache_init(const char *name, int cache_size, int cache_threshold); @@ -202,7 +203,7 @@ void fld_cache_delete(struct fld_cache *cache, 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); + const u64 seq, struct lu_seq_range *range); struct fld_cache_entry * fld_cache_entry_lookup(struct fld_cache *cache,