X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Ffld%2Ffld_internal.h;h=025e11e3a1faa53b9cb252485c0696b32fdd7071;hb=refs%2Fchanges%2F99%2F13299%2F3;hp=1545a60a7cb8dd74adeb8ff557be075647a68a81;hpb=08aa217ce49aba1ded52e0f7adb8a607035123fd;p=fs%2Flustre-release.git diff --git a/lustre/fld/fld_internal.h b/lustre/fld/fld_internal.h index 1545a60..025e11e 100644 --- a/lustre/fld/fld_internal.h +++ b/lustre/fld/fld_internal.h @@ -27,7 +27,7 @@ * 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, 2014, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -35,17 +35,33 @@ * * 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 { @@ -56,7 +72,6 @@ enum { 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 +86,11 @@ 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 +98,7 @@ 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 +114,11 @@ 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. */ @@ -112,13 +127,7 @@ struct fld_cache { /** * Cache name used for debug and messages. */ char fci_name[80]; - int fci_no_shrink:1; -}; - -enum fld_op { - FLD_CREATE = 0, - FLD_DELETE = 1, - FLD_LOOKUP = 2 + unsigned int fci_no_shrink:1; }; enum { @@ -139,44 +148,56 @@ enum { extern struct lu_fld_hash fld_hash[]; -#ifdef __KERNEL__ +#ifdef CONFIG_PROC_FS +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 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; +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); int fld_declare_index_create(const struct lu_env *env, struct lu_server_fld *fld, - const struct lu_seq_range *new, + const struct lu_seq_range *new_range, 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); + 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_client_rpc(struct obd_export *exp, - struct lu_seq_range *range, __u32 fld_op); +int fld_name_to_index(const char *name, __u32 *index); +int fld_server_mod_init(void); -#ifdef LPROCFS -extern struct lprocfs_vars fld_server_proc_list[]; -extern struct lprocfs_vars fld_client_proc_list[]; -#endif +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 CONFIG_PROC_FS +extern const struct file_operations fld_proc_seq_fops; +extern struct lprocfs_seq_vars fld_server_proc_list[]; #endif +# endif /* HAVE_SERVER_SUPPORT */ + +int fld_client_rpc(struct obd_export *exp, + struct lu_seq_range *range, __u32 fld_op, + struct ptlrpc_request **reqp); + struct fld_cache *fld_cache_init(const char *name, int cache_size, int cache_threshold); @@ -197,29 +218,28 @@ 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, + const 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); +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 */