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 struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *filename);
21 int gfs2_dir_check(struct inode *dir, const struct qstr *filename,
22 const struct gfs2_inode *ip);
23 int gfs2_dir_add(struct inode *inode, const struct qstr *filename,
24 const struct gfs2_inode *ip, unsigned int type);
25 int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *filename);
26 int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque,
28 int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
29 const struct gfs2_inode *nip, unsigned int new_type);
31 int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip);
33 int gfs2_diradd_alloc_required(struct inode *dir,
34 const struct qstr *filename);
35 int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block,
36 struct buffer_head **bhp);
38 static inline u32 gfs2_disk_hash(const char *data, int len)
40 return crc32_le((u32)~0, data, len) ^ (u32)~0;
44 static inline void gfs2_str2qstr(struct qstr *name, const char *fname)
47 name->len = strlen(fname);
48 name->hash = gfs2_disk_hash(name->name, name->len);
51 /* N.B. This probably ought to take inum & type as args as well */
52 static inline void gfs2_qstr2dirent(const struct qstr *name, u16 reclen, struct gfs2_dirent *dent)
54 dent->de_inum.no_addr = cpu_to_be64(0);
55 dent->de_inum.no_formal_ino = cpu_to_be64(0);
56 dent->de_hash = cpu_to_be32(name->hash);
57 dent->de_rec_len = cpu_to_be16(reclen);
58 dent->de_name_len = cpu_to_be16(name->len);
59 dent->de_type = cpu_to_be16(0);
60 memset(dent->__pad, 0, sizeof(dent->__pad));
61 memcpy(dent + 1, name->name, name->len);
64 #endif /* __DIR_DOT_H__ */