74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
* of the GNU General Public License v.2.
|
|
*/
|
|
|
|
#ifndef __DIR_DOT_H__
|
|
#define __DIR_DOT_H__
|
|
|
|
/**
|
|
* gfs2_filldir_t - Report a directory entry to the caller of gfs2_dir_read()
|
|
* @opaque: opaque data used by the function
|
|
* @name: the name of the directory entry
|
|
* @length: the length of the name
|
|
* @offset: the entry's offset in the directory
|
|
* @inum: the inode number the entry points to
|
|
* @type: the type of inode the entry points to
|
|
*
|
|
* Returns: 0 on success, 1 if buffer full
|
|
*/
|
|
|
|
typedef int (*gfs2_filldir_t) (void *opaque,
|
|
const char *name, unsigned int length,
|
|
uint64_t offset,
|
|
struct gfs2_inum *inum, unsigned int type);
|
|
|
|
int gfs2_dir_search(struct inode *dir, const struct qstr *filename,
|
|
struct gfs2_inum *inum, unsigned int *type);
|
|
int gfs2_dir_add(struct inode *inode, const struct qstr *filename,
|
|
const struct gfs2_inum *inum, unsigned int type);
|
|
int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *filename);
|
|
int gfs2_dir_read(struct inode *inode, uint64_t * offset, void *opaque,
|
|
gfs2_filldir_t filldir);
|
|
int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
|
|
struct gfs2_inum *new_inum, unsigned int new_type);
|
|
|
|
int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip);
|
|
|
|
int gfs2_diradd_alloc_required(struct inode *dir,
|
|
const struct qstr *filename);
|
|
int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, uint64_t block,
|
|
struct buffer_head **bhp);
|
|
|
|
static inline uint32_t gfs2_disk_hash(const char *data, int len)
|
|
{
|
|
return crc32_le(0xFFFFFFFF, data, len) ^ 0xFFFFFFFF;
|
|
}
|
|
|
|
|
|
static inline void gfs2_str2qstr(struct qstr *name, const char *fname)
|
|
{
|
|
name->name = fname;
|
|
name->len = strlen(fname);
|
|
name->hash = gfs2_disk_hash(name->name, name->len);
|
|
}
|
|
|
|
/* N.B. This probably ought to take inum & type as args as well */
|
|
static inline void gfs2_qstr2dirent(const struct qstr *name, u16 reclen, struct gfs2_dirent *dent)
|
|
{
|
|
dent->de_inum.no_addr = cpu_to_be64(0);
|
|
dent->de_inum.no_formal_ino = cpu_to_be64(0);
|
|
dent->de_hash = cpu_to_be32(name->hash);
|
|
dent->de_rec_len = cpu_to_be16(reclen);
|
|
dent->de_name_len = cpu_to_be16(name->len);
|
|
dent->de_type = cpu_to_be16(0);
|
|
memset(dent->__pad, 0, sizeof(dent->__pad));
|
|
memcpy((char*)(dent+1), name->name, name->len);
|
|
}
|
|
|
|
#endif /* __DIR_DOT_H__ */
|