2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 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 version 2.
13 #include <linux/dcache.h>
14 #include <linux/crc32.h>
20 extern struct inode
*gfs2_dir_search(struct inode
*dir
,
21 const struct qstr
*filename
);
22 extern int gfs2_dir_check(struct inode
*dir
, const struct qstr
*filename
,
23 const struct gfs2_inode
*ip
);
24 extern int gfs2_dir_add(struct inode
*inode
, const struct qstr
*filename
,
25 const struct gfs2_inode
*ip
);
26 extern int gfs2_dir_del(struct gfs2_inode
*dip
, const struct dentry
*dentry
);
27 extern int gfs2_dir_read(struct inode
*inode
, u64
*offset
, void *opaque
,
28 filldir_t filldir
, struct file_ra_state
*f_ra
);
29 extern int gfs2_dir_mvino(struct gfs2_inode
*dip
, const struct qstr
*filename
,
30 const struct gfs2_inode
*nip
, unsigned int new_type
);
32 extern int gfs2_dir_exhash_dealloc(struct gfs2_inode
*dip
);
34 extern int gfs2_diradd_alloc_required(struct inode
*dir
,
35 const struct qstr
*filename
);
36 extern int gfs2_dir_get_new_buffer(struct gfs2_inode
*ip
, u64 block
,
37 struct buffer_head
**bhp
);
38 extern void gfs2_dir_hash_inval(struct gfs2_inode
*ip
);
40 static inline u32
gfs2_disk_hash(const char *data
, int len
)
42 return crc32_le((u32
)~0, data
, len
) ^ (u32
)~0;
46 static inline void gfs2_str2qstr(struct qstr
*name
, const char *fname
)
49 name
->len
= strlen(fname
);
50 name
->hash
= gfs2_disk_hash(name
->name
, name
->len
);
53 /* N.B. This probably ought to take inum & type as args as well */
54 static inline void gfs2_qstr2dirent(const struct qstr
*name
, u16 reclen
, struct gfs2_dirent
*dent
)
56 dent
->de_inum
.no_addr
= cpu_to_be64(0);
57 dent
->de_inum
.no_formal_ino
= cpu_to_be64(0);
58 dent
->de_hash
= cpu_to_be32(name
->hash
);
59 dent
->de_rec_len
= cpu_to_be16(reclen
);
60 dent
->de_name_len
= cpu_to_be16(name
->len
);
61 dent
->de_type
= cpu_to_be16(0);
62 memset(dent
->__pad
, 0, sizeof(dent
->__pad
));
63 memcpy(dent
+ 1, name
->name
, name
->len
);
66 extern struct qstr gfs2_qdot
;
67 extern struct qstr gfs2_qdotdot
;
69 #endif /* __DIR_DOT_H__ */
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