-/* -*- 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.
*
- * Copyright (C) 2006 Cluster File Systems, Inc.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * 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
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * 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.
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
*
+ * Copyright (c) 2011, 2013, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*/
#ifndef __LINUX_FLD_H
#define __LINUX_FLD_H
-#include <lustre/lustre_idl.h>
-#include <lustre_mdt.h>
-#include <dt_object.h>
+/** \defgroup fld fld
+ *
+ * @{
+ */
+#include <lustre/lustre_idl.h>
#include <libcfs/libcfs.h>
+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.
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. */
+ /**
+ * Fld dir proc entry. */
cfs_proc_dir_entry_t *lsf_proc_dir;
- /* /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" */
+ /**
+ * Fld service name in form "fld-srv-lustre-MDTXXX" */
char lsf_name[80];
-};
-enum {
- LUSTRE_FLD_INIT = 1 << 0,
- LUSTRE_FLD_RUN = 1 << 1
+ /**
+ * Just reformated 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;
};
struct lu_client_fld {
- /* Client side proc entry. */
- cfs_proc_dir_entry_t *lcf_proc_dir;
+ /**
+ * Client side proc entry. */
+ struct proc_dir_entry *lcf_proc_dir;
- /* 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. */
+ /**
+ * Client fld proc entry name. */
char lcf_name[80];
- const struct lu_context *lcf_ctx;
-
- int lcf_flags;
+ int lcf_flags;
};
-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,
+ seqno_t 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,
+ seqno_t 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,
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, seqno_t seq, mdsno_t *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,
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_proc_fini(struct lu_client_fld *fld);
-int
-fld_cache_lookup(struct fld_cache *cache,
- seqno_t seq, mdsno_t *mds);
+/** @} fld */
#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff