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/
35 * Author: Nikita Danilov <nikita@clusterfs.com>
39 * Object Index (oi) service runs in the bottom layer of server stack. In
40 * translates fid local to this service to the storage cookie that uniquely
41 * and efficiently identifies object (inode) of the underlying file system.
48 /* struct rw_semaphore */
49 #include <linux/rwsem.h>
50 #include <linux/jbd2.h>
51 #include <lustre_fid.h>
52 #include <lu_object.h>
53 #include <md_object.h>
55 #define OSD_OI_FID_OID_BITS 6
56 #define OSD_OI_FID_NR (1UL << OSD_OI_FID_OID_BITS)
57 #define OSD_OII_NOGEN (0)
60 struct osd_thread_info;
68 * Storage cookie. Datum uniquely identifying inode on the underlying file
71 * osd_inode_id is the internal ldiskfs identifier for an object. It should
72 * not be visible outside of the osd-ldiskfs. Other OSDs may have different
73 * identifiers, so this cannot form any part of the OSD API.
76 __u32 oii_ino; /* inode number */
77 __u32 oii_gen; /* inode generation */
81 struct osd_idmap_cache {
82 struct lu_fid oic_fid;
83 struct osd_inode_id oic_lid;
84 struct osd_device *oic_dev;
85 __u16 oic_remote:1; /* FID isn't local */
88 static inline void osd_id_pack(struct osd_inode_id *tgt,
89 const struct osd_inode_id *src)
91 tgt->oii_ino = cpu_to_be32(src->oii_ino);
92 tgt->oii_gen = cpu_to_be32(src->oii_gen);
95 static inline void osd_id_unpack(struct osd_inode_id *tgt,
96 struct osd_inode_id *src)
98 tgt->oii_ino = be32_to_cpu(src->oii_ino);
99 tgt->oii_gen = be32_to_cpu(src->oii_gen);
102 static inline void osd_id_gen(struct osd_inode_id *id, __u32 ino, __u32 gen)
108 static inline void osd_id_to_inode(struct inode *inode,
109 const struct osd_inode_id *id)
111 inode->i_ino = id->oii_ino;
112 inode->i_generation = id->oii_gen;
115 static inline int osd_id_eq(const struct osd_inode_id *id0,
116 const struct osd_inode_id *id1)
118 return (id0->oii_ino == id1->oii_ino) &&
119 (id0->oii_gen == id1->oii_gen ||
120 id0->oii_gen == OSD_OII_NOGEN ||
121 id1->oii_gen == OSD_OII_NOGEN);
124 static inline int osd_id_eq_strict(const struct osd_inode_id *id0,
125 const struct osd_inode_id *id1)
127 return (id0->oii_ino == id1->oii_ino && id0->oii_gen == id1->oii_gen);
130 enum oi_check_flags {
131 OI_CHECK_FLD = 0x00000001,
132 OI_KNOWN_ON_OST = 0x00000002,
133 OI_LOCKED = 0x00000004,
136 extern unsigned int osd_oi_count;
138 int osd_oi_mod_init(void);
139 int osd_oi_init(struct osd_thread_info *info, struct osd_device *osd,
141 void osd_oi_fini(struct osd_thread_info *info, struct osd_device *osd);
142 int osd_oi_lookup(struct osd_thread_info *info, struct osd_device *osd,
143 const struct lu_fid *fid, struct osd_inode_id *id,
144 enum oi_check_flags flags);
145 int osd_oi_insert(struct osd_thread_info *info, struct osd_device *osd,
146 const struct lu_fid *fid, const struct osd_inode_id *id,
147 handle_t *th, enum oi_check_flags flags, bool *exist);
148 int osd_oi_delete(struct osd_thread_info *info,
149 struct osd_device *osd, const struct lu_fid *fid,
150 handle_t *th, enum oi_check_flags flags);
151 int osd_oi_update(struct osd_thread_info *info, struct osd_device *osd,
152 const struct lu_fid *fid, const struct osd_inode_id *id,
153 handle_t *th, enum oi_check_flags flags);
155 int fid_is_on_ost(struct osd_thread_info *info, struct osd_device *osd,
156 const struct lu_fid *fid, enum oi_check_flags flags);
157 #endif /* _OSD_OI_H */