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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Author: Nikita Danilov <nikita@clusterfs.com>
40 * Object Index (oi) service runs in the bottom layer of server stack. In
41 * translates fid local to this service to the storage cookie that uniquely
42 * and efficiently identifies object (inode) of the underlying file system.
49 /* struct rw_semaphore */
50 #include <linux/rwsem.h>
51 #include <linux/jbd2.h>
52 #include <lustre_fid.h>
53 #include <lu_object.h>
54 #include <md_object.h>
56 #define OSD_OI_FID_NR (1UL << OSD_OI_FID_OID_BITS)
57 #define OSD_OI_FID_NR_MAX (1UL << OSD_OI_FID_OID_BITS_MAX)
59 #define OSD_OII_NOGEN (0)
62 struct osd_thread_info;
70 * Storage cookie. Datum uniquely identifying inode on the underlying file
73 * osd_inode_id is the internal ldiskfs identifier for an object. It should
74 * not be visible outside of the osd-ldiskfs. Other OSDs may have different
75 * identifiers, so this cannot form any part of the OSD API.
78 __u32 oii_ino; /* inode number */
79 __u32 oii_gen; /* inode generation */
83 struct osd_idmap_cache {
84 struct lu_fid oic_fid;
85 struct osd_inode_id oic_lid;
86 struct osd_device *oic_dev;
87 __u16 oic_remote:1; /* FID isn't local */
90 static inline void osd_id_pack(struct osd_inode_id *tgt,
91 const struct osd_inode_id *src)
93 tgt->oii_ino = cpu_to_be32(src->oii_ino);
94 tgt->oii_gen = cpu_to_be32(src->oii_gen);
97 static inline void osd_id_unpack(struct osd_inode_id *tgt,
98 struct osd_inode_id *src)
100 tgt->oii_ino = be32_to_cpu(src->oii_ino);
101 tgt->oii_gen = be32_to_cpu(src->oii_gen);
104 static inline void osd_id_gen(struct osd_inode_id *id, __u32 ino, __u32 gen)
110 static inline void osd_id_to_inode(struct inode *inode,
111 const struct osd_inode_id *id)
113 inode->i_ino = id->oii_ino;
114 inode->i_generation = id->oii_gen;
117 static inline int osd_id_eq(const struct osd_inode_id *id0,
118 const struct osd_inode_id *id1)
120 return (id0->oii_ino == id1->oii_ino) &&
121 (id0->oii_gen == id1->oii_gen ||
122 id0->oii_gen == OSD_OII_NOGEN ||
123 id1->oii_gen == OSD_OII_NOGEN);
126 static inline int osd_id_eq_strict(const struct osd_inode_id *id0,
127 const struct osd_inode_id *id1)
129 return (id0->oii_ino == id1->oii_ino && id0->oii_gen == id1->oii_gen);
132 enum oi_check_flags {
133 OI_CHECK_FLD = 0x00000001,
134 OI_KNOWN_ON_OST = 0x00000002,
137 int osd_oi_mod_init(void);
138 int osd_oi_init(struct osd_thread_info *info, struct osd_device *osd,
140 void osd_oi_fini(struct osd_thread_info *info, struct osd_device *osd);
141 int osd_oi_lookup(struct osd_thread_info *info, struct osd_device *osd,
142 const struct lu_fid *fid, struct osd_inode_id *id,
143 enum oi_check_flags flags);
144 int osd_oi_insert(struct osd_thread_info *info, struct osd_device *osd,
145 const struct lu_fid *fid, const struct osd_inode_id *id,
146 handle_t *th, enum oi_check_flags flags, bool *exist);
147 int osd_oi_delete(struct osd_thread_info *info,
148 struct osd_device *osd, const struct lu_fid *fid,
149 handle_t *th, enum oi_check_flags flags);
150 int osd_oi_update(struct osd_thread_info *info, struct osd_device *osd,
151 const struct lu_fid *fid, const struct osd_inode_id *id,
152 handle_t *th, enum oi_check_flags flags);
154 int fid_is_on_ost(struct osd_thread_info *info, struct osd_device *osd,
155 const struct lu_fid *fid, enum oi_check_flags flags);
156 #endif /* _OSD_OI_H */