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_new_buffer(struct gfs2_inode *ip, uint64_t block,
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__ */