*
* 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
*/
* 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/
*
* 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 <sequence_range, node_index> 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 <umka@clusterfs.com>
* Author: Tom WangDi <wangdi@clusterfs.com>
*/
#define __FLD_INTERNAL_H
#include <obd.h>
-#include <lustre/lustre_idl.h>
#include <libcfs/libcfs.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;
};
-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;
+ const char *fh_name;
+ int (*fh_hash_func)(struct lu_client_fld *fld,
+ __u64 seq);
+ struct lu_fld_target * (*fh_scan_func)(struct lu_client_fld *fld,
+ __u64 seq);
};
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 {
/**
* 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. */
- struct fld_stats fci_stat;
+ /**
+ * Cache statistics.
+ */
+ struct fld_stats fci_stat;
- /**
- * Cache name used for debug and messages. */
- char fci_name[80];
- unsigned int fci_no_shrink:1;
+ /**
+ * Cache name used for debug and messages.
+ */
+ char fci_name[LUSTRE_MDT_MAXNAMELEN];
};
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;
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 ldebugfs_vars fld_client_debugfs_list[];
struct fld_cache *fld_cache_init(const char *name,
int cache_size, int cache_threshold);
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,
- 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);
+ const u64 seq, struct lu_seq_range *range);
static inline const char *
fld_target_name(const struct lu_fld_target *tar)
git://git.whamcloud.com / fs / lustre-release.git / blobdiff