X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Ffld%2Ffld_internal.h;h=5fce515ee2854af83c689031bd49a3eebb31ac08;hb=36ba989752c62cc76b06089373fcd6cec6da9008;hp=61955bed69114033619bec4cd45740dc65a8538c;hpb=9fb46705ae86aa2c0ac29427f0ff24f923560eb7;p=fs%2Flustre-release.git diff --git a/lustre/fld/fld_internal.h b/lustre/fld/fld_internal.h index 61955be..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, Whamcloud, Inc. + * Copyright (c) 2012, 2015, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -35,28 +31,37 @@ * * 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 */ #ifndef __FLD_INTERNAL_H #define __FLD_INTERNAL_H -#include -#include - +#include #include -#include #include -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); @@ -71,11 +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 { @@ -83,7 +88,7 @@ struct fld_cache { * Cache guard, protects fci_hash mostly because others immutable after * init is finished. */ - spinlock_t fci_lock; + rwlock_t fci_lock; /** * Cache shrink threshold */ @@ -99,11 +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. */ @@ -112,12 +117,7 @@ struct fld_cache { /** * Cache name used for debug and messages. */ char fci_name[80]; -}; - -enum fld_op { - FLD_CREATE = 0, - FLD_DELETE = 1, - FLD_LOOKUP = 2 + unsigned int fci_no_shrink:1; }; enum { @@ -138,48 +138,50 @@ enum { extern struct lu_fld_hash fld_hash[]; -#ifdef __KERNEL__ - +# ifdef HAVE_SERVER_SUPPORT 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; + 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(struct lu_server_fld *fld, - const struct lu_env *env, - struct dt_device *dt); +struct dt_device; +int fld_index_init(const struct lu_env *env, struct lu_server_fld *fld, + struct dt_device *dt, int type); -void fld_index_fini(struct lu_server_fld *fld, - const struct lu_env *env); +void fld_index_fini(const struct lu_env *env, struct lu_server_fld *fld); -int fld_index_create(struct lu_server_fld *fld, - const struct lu_env *env, - const struct lu_seq_range *range, - struct thandle *th); +int fld_declare_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_delete(struct lu_server_fld *fld, - const struct lu_env *env, - struct lu_seq_range *range, - struct thandle *th); +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(struct lu_server_fld *fld, - const struct lu_env *env, - seqno_t seq, struct lu_seq_range *range); +int fld_index_lookup(const struct lu_env *env, struct lu_server_fld *fld, + u64 seq, struct lu_seq_range *range); -int fld_client_rpc(struct obd_export *exp, - struct lu_seq_range *range, __u32 fld_op); +int fld_name_to_index(const char *name, __u32 *index); -#ifdef LPROCFS -extern struct lprocfs_vars fld_server_proc_list[]; -extern struct lprocfs_vars fld_client_proc_list[]; -#endif +int fld_server_mod_init(void); +void fld_server_mod_exit(void); -#endif +int fld_server_read(const struct lu_env *env, struct lu_server_fld *fld, + struct lu_seq_range *range, void *data, int data_len); + +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); + +extern struct lprocfs_vars fld_client_debugfs_list[]; struct fld_cache *fld_cache_init(const char *name, int cache_size, int cache_threshold); @@ -188,24 +190,41 @@ void fld_cache_fini(struct fld_cache *cache); void fld_cache_flush(struct fld_cache *cache); -void fld_cache_insert(struct fld_cache *cache, - const struct lu_seq_range *range); +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); + const u64 seq, struct lu_seq_range *range); + +struct fld_cache_entry * +fld_cache_entry_lookup(struct fld_cache *cache, + const struct lu_seq_range *range); + +void fld_cache_entry_delete(struct fld_cache *cache, + struct fld_cache_entry *node); + +struct fld_cache_entry * +fld_cache_entry_lookup_nolock(struct fld_cache *cache, + const struct lu_seq_range *range); static inline const char * -fld_target_name(struct lu_fld_target *tar) +fld_target_name(const struct lu_fld_target *tar) { - if (tar->ft_srv != NULL) - return tar->ft_srv->lsf_name; +#ifdef HAVE_SERVER_SUPPORT + if (tar->ft_srv != NULL) + return tar->ft_srv->lsf_name; +#endif - return (const char *)tar->ft_exp->exp_obd->obd_name; + return tar->ft_exp->exp_obd->obd_name; } -extern cfs_proc_dir_entry_t *fld_type_proc_dir; -extern struct file_operations fld_proc_seq_fops; #endif /* __FLD_INTERNAL_H */