4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
40 * Author: Nikita Danilov <nikita@clusterfs.com>
44 * Object Index (oi) service runs in the bottom layer of server stack. In
45 * translates fid local to this service to the storage cookie that uniquely
46 * and efficiently identifies object (inode) of the underlying file system.
52 #if defined(__KERNEL__)
54 /* struct rw_semaphore */
55 #include <linux/rwsem.h>
56 #include <lustre_fid.h>
57 #include <lu_object.h>
58 #include <md_object.h>
60 #define OSD_OI_FID_NR (1UL << OSD_OI_FID_OID_BITS)
61 #define OSD_OI_FID_NR_MAX (1UL << OSD_OI_FID_OID_BITS_MAX)
63 #define OSD_OII_NOGEN (0)
66 struct osd_thread_info;
75 * Storage cookie. Datum uniquely identifying inode on the underlying file
78 * osd_inode_id is the internal ldiskfs identifier for an object. It should
79 * not be visible outside of the osd-ldiskfs. Other OSDs may have different
80 * identifiers, so this cannot form any part of the OSD API.
83 __u32 oii_ino; /* inode number */
84 __u32 oii_gen; /* inode generation */
87 static inline void osd_id_pack(struct osd_inode_id *tgt,
88 const struct osd_inode_id *src)
90 tgt->oii_ino = cpu_to_be32(src->oii_ino);
91 tgt->oii_gen = cpu_to_be32(src->oii_gen);
94 static inline void osd_id_unpack(struct osd_inode_id *tgt,
95 struct osd_inode_id *src)
97 tgt->oii_ino = be32_to_cpu(src->oii_ino);
98 tgt->oii_gen = be32_to_cpu(src->oii_gen);
101 static inline void osd_id_gen(struct osd_inode_id *id, __u32 ino, __u32 gen)
107 static inline void osd_id_to_inode(struct inode *inode,
108 const struct osd_inode_id *id)
110 inode->i_ino = id->oii_ino;
111 inode->i_generation = id->oii_gen;
114 static inline int osd_id_eq(const struct osd_inode_id *id0,
115 const struct osd_inode_id *id1)
117 return (id0->oii_ino == id1->oii_ino) &&
118 (id0->oii_gen == id1->oii_gen ||
119 id0->oii_gen == OSD_OII_NOGEN ||
120 id1->oii_gen == OSD_OII_NOGEN);
123 int osd_oi_mod_init(void);
124 int osd_oi_init(struct osd_thread_info *info, struct osd_device *osd);
125 void osd_oi_fini(struct osd_thread_info *info, struct osd_device *osd);
126 int __osd_oi_lookup(struct osd_thread_info *info, struct osd_device *osd,
127 const struct lu_fid *fid, struct osd_inode_id *id);
128 int osd_oi_lookup(struct osd_thread_info *info, struct osd_device *osd,
129 const struct lu_fid *fid, struct osd_inode_id *id);
130 int osd_oi_insert(struct osd_thread_info *info, struct osd_device *osd,
131 const struct lu_fid *fid, const struct osd_inode_id *id,
133 int osd_oi_delete(struct osd_thread_info *info,
134 struct osd_device *osd, const struct lu_fid *fid,
137 #endif /* __KERNEL__ */
138 #endif /* _OSD_OI_H */