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6 * This program is free software; you can redistribute it and/or modify
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10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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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, 2013, Intel Corporation.
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.
53 /* struct rw_semaphore */
54 #include <linux/rwsem.h>
55 #include <linux/jbd2.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;
74 * Storage cookie. Datum uniquely identifying inode on the underlying file
77 * osd_inode_id is the internal ldiskfs identifier for an object. It should
78 * not be visible outside of the osd-ldiskfs. Other OSDs may have different
79 * identifiers, so this cannot form any part of the OSD API.
82 __u32 oii_ino; /* inode number */
83 __u32 oii_gen; /* inode generation */
87 struct osd_idmap_cache {
88 struct lu_fid oic_fid;
89 struct osd_inode_id oic_lid;
90 struct osd_device *oic_dev;
91 __u16 oic_remote:1; /* FID isn't local */
94 static inline void osd_id_pack(struct osd_inode_id *tgt,
95 const struct osd_inode_id *src)
97 tgt->oii_ino = cpu_to_be32(src->oii_ino);
98 tgt->oii_gen = cpu_to_be32(src->oii_gen);
101 static inline void osd_id_unpack(struct osd_inode_id *tgt,
102 struct osd_inode_id *src)
104 tgt->oii_ino = be32_to_cpu(src->oii_ino);
105 tgt->oii_gen = be32_to_cpu(src->oii_gen);
108 static inline void osd_id_gen(struct osd_inode_id *id, __u32 ino, __u32 gen)
114 static inline void osd_id_to_inode(struct inode *inode,
115 const struct osd_inode_id *id)
117 inode->i_ino = id->oii_ino;
118 inode->i_generation = id->oii_gen;
121 static inline int osd_id_eq(const struct osd_inode_id *id0,
122 const struct osd_inode_id *id1)
124 return (id0->oii_ino == id1->oii_ino) &&
125 (id0->oii_gen == id1->oii_gen ||
126 id0->oii_gen == OSD_OII_NOGEN ||
127 id1->oii_gen == OSD_OII_NOGEN);
130 static inline int osd_id_eq_strict(const struct osd_inode_id *id0,
131 const struct osd_inode_id *id1)
133 return (id0->oii_ino == id1->oii_ino && id0->oii_gen == id1->oii_gen);
136 enum oi_check_flags {
137 OI_CHECK_FLD = 0x00000001,
138 OI_KNOWN_ON_OST = 0x00000002,
141 int osd_oi_mod_init(void);
142 int osd_oi_init(struct osd_thread_info *info, struct osd_device *osd);
143 void osd_oi_fini(struct osd_thread_info *info, struct osd_device *osd);
144 int osd_oi_lookup(struct osd_thread_info *info, struct osd_device *osd,
145 const struct lu_fid *fid, struct osd_inode_id *id,
146 enum oi_check_flags flags);
147 int osd_oi_insert(struct osd_thread_info *info, struct osd_device *osd,
148 const struct lu_fid *fid, const struct osd_inode_id *id,
149 handle_t *th, enum oi_check_flags flags);
150 int osd_oi_delete(struct osd_thread_info *info,
151 struct osd_device *osd, const struct lu_fid *fid,
152 handle_t *th, enum oi_check_flags flags);
153 int osd_oi_update(struct osd_thread_info *info, struct osd_device *osd,
154 const struct lu_fid *fid, const struct osd_inode_id *id,
155 handle_t *th, enum oi_check_flags flags);
157 int fid_is_on_ost(struct osd_thread_info *info, struct osd_device *osd,
158 const struct lu_fid *fid, enum oi_check_flags flags);
159 #endif /* _OSD_OI_H */