--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * 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 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).
+ *
+ * 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.
+ *
+ * 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.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/fld/fld_internal.h
+ *
+ * Author: Yury Umanets <umka@clusterfs.com>
+ * Author: Tom WangDi <wangdi@clusterfs.com>
+ */
+#ifndef __FLD_INTERNAL_H
+#define __FLD_INTERNAL_H
+
+#include "../include/lustre/lustre_idl.h"
+#include "../include/dt_object.h"
+
+#include "../../include/linux/libcfs/libcfs.h"
+#include "../include/lustre_req_layout.h"
+#include "../include/lustre_fld.h"
+
+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);
+
+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 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 {
+ /**
+ * Cache guard, protects fci_hash mostly because others immutable after
+ * init is finished.
+ */
+ rwlock_t fci_lock;
+
+ /**
+ * Cache shrink threshold */
+ int fci_threshold;
+
+ /**
+ * Preferred number of cached entries */
+ int fci_cache_size;
+
+ /**
+ * Current number of cached entries. Protected by \a fci_lock */
+ int fci_cache_count;
+
+ /**
+ * LRU list fld entries. */
+ struct list_head fci_lru;
+
+ /**
+ * sorted fld entries. */
+ struct list_head fci_entries_head;
+
+ /**
+ * Cache statistics. */
+ struct fld_stats fci_stat;
+
+ /**
+ * Cache name used for debug and messages. */
+ char fci_name[LUSTRE_MDT_MAXNAMELEN];
+ unsigned int fci_no_shrink:1;
+};
+
+enum fld_op {
+ FLD_CREATE = 0,
+ FLD_DELETE = 1,
+ FLD_LOOKUP = 2
+};
+
+enum {
+ /* 4M of FLD cache will not hurt client a lot. */
+ FLD_SERVER_CACHE_SIZE = (4 * 0x100000),
+
+ /* 1M of FLD cache will not hurt client a lot. */
+ FLD_CLIENT_CACHE_SIZE = (1 * 0x100000)
+};
+
+enum {
+ /* Cache threshold is 10 percent of size. */
+ FLD_SERVER_CACHE_THRESHOLD = 10,
+
+ /* Cache threshold is 10 percent of size. */
+ FLD_CLIENT_CACHE_THRESHOLD = 10
+};
+
+extern struct lu_fld_hash fld_hash[];
+
+int fld_client_rpc(struct obd_export *exp,
+ struct lu_seq_range *range, __u32 fld_op);
+
+#if defined(CONFIG_PROC_FS)
+extern struct lprocfs_vars fld_client_proc_list[];
+#endif
+
+
+struct fld_cache *fld_cache_init(const char *name,
+ 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,
+ 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 u64 seq, 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);
+
+static inline const char *
+fld_target_name(struct lu_fld_target *tar)
+{
+ if (tar->ft_srv != NULL)
+ return tar->ft_srv->lsf_name;
+
+ return (const char *)tar->ft_exp->exp_obd->obd_name;
+}
+
+#endif /* __FLD_INTERNAL_H */
Code Review / kvmfornfv.git / blobdiff