2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License v.2.
14 * gfs2_filldir_t - Report a directory entry to the caller of gfs2_dir_read()
15 * @opaque: opaque data used by the function
16 * @name: the name of the directory entry
17 * @length: the length of the name
18 * @offset: the entry's offset in the directory
19 * @inum: the inode number the entry points to
20 * @type: the type of inode the entry points to
22 * Returns: 0 on success, 1 if buffer full
25 typedef int (*gfs2_filldir_t
) (void *opaque
,
26 const char *name
, unsigned int length
,
28 struct gfs2_inum
*inum
, unsigned int type
);
30 int gfs2_dir_search(struct inode
*dir
, const struct qstr
*filename
,
31 struct gfs2_inum
*inum
, unsigned int *type
);
32 int gfs2_dir_add(struct inode
*inode
, const struct qstr
*filename
,
33 const struct gfs2_inum
*inum
, unsigned int type
);
34 int gfs2_dir_del(struct gfs2_inode
*dip
, const struct qstr
*filename
);
35 int gfs2_dir_read(struct inode
*inode
, uint64_t * offset
, void *opaque
,
36 gfs2_filldir_t filldir
);
37 int gfs2_dir_mvino(struct gfs2_inode
*dip
, const struct qstr
*filename
,
38 struct gfs2_inum
*new_inum
, unsigned int new_type
);
40 int gfs2_dir_exhash_dealloc(struct gfs2_inode
*dip
);
42 int gfs2_diradd_alloc_required(struct inode
*dir
,
43 const struct qstr
*filename
);
44 int gfs2_dir_get_buffer(struct gfs2_inode
*ip
, uint64_t block
, int new,
45 struct buffer_head
**bhp
);
47 static inline uint32_t gfs2_disk_hash(const char *data
, int len
)
49 return crc32_le(0xFFFFFFFF, data
, len
) ^ 0xFFFFFFFF;
53 static inline void gfs2_str2qstr(struct qstr
*name
, const char *fname
)
56 name
->len
= strlen(fname
);
57 name
->hash
= gfs2_disk_hash(name
->name
, name
->len
);
60 /* N.B. This probably ought to take inum & type as args as well */
61 static inline void gfs2_qstr2dirent(const struct qstr
*name
, u16 reclen
, struct gfs2_dirent
*dent
)
63 dent
->de_inum
.no_addr
= cpu_to_be64(0);
64 dent
->de_inum
.no_formal_ino
= cpu_to_be64(0);
65 dent
->de_hash
= cpu_to_be32(name
->hash
);
66 dent
->de_rec_len
= cpu_to_be16(reclen
);
67 dent
->de_name_len
= cpu_to_be16(name
->len
);
68 dent
->de_type
= cpu_to_be16(0);
69 memset(dent
->__pad
, 0, sizeof(dent
->__pad
));
70 memcpy((char*)(dent
+1), name
->name
, name
->len
);
73 #endif /* __DIR_DOT_H__ */