blob: ff5772fbf024afe0ec48f4c094ec204b45b96abb [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -04003 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
10#ifndef __DIR_DOT_H__
11#define __DIR_DOT_H__
12
Steven Whitehousef2f7ba52006-09-05 10:39:21 -040013#include <linux/dcache.h>
Steven Whitehouseb5289682008-11-26 12:49:26 +000014#include <linux/crc32.h>
Steven Whitehousef2f7ba52006-09-05 10:39:21 -040015
16struct inode;
17struct gfs2_inode;
18struct gfs2_inum;
19
Steven Whitehouse8d123582010-09-17 12:30:23 +010020extern struct inode *gfs2_dir_search(struct inode *dir,
21 const struct qstr *filename);
22extern int gfs2_dir_check(struct inode *dir, const struct qstr *filename,
23 const struct gfs2_inode *ip);
24extern int gfs2_dir_add(struct inode *inode, const struct qstr *filename,
Steven Whitehouse3d6ecb72011-05-09 13:30:08 +010025 const struct gfs2_inode *ip);
Steven Whitehouse855d23c2011-05-09 16:42:37 +010026extern int gfs2_dir_del(struct gfs2_inode *dip, const struct dentry *dentry);
Steven Whitehouse8d123582010-09-17 12:30:23 +010027extern int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque,
28 filldir_t filldir);
29extern int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
30 const struct gfs2_inode *nip, unsigned int new_type);
David Teiglandb3b94fa2006-01-16 16:50:04 +000031
Steven Whitehouse8d123582010-09-17 12:30:23 +010032extern int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +000033
Steven Whitehouse8d123582010-09-17 12:30:23 +010034extern int gfs2_diradd_alloc_required(struct inode *dir,
35 const struct qstr *filename);
36extern int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block,
37 struct buffer_head **bhp);
Steven Whitehouse17d539f2011-06-15 10:29:37 +010038extern void gfs2_dir_hash_inval(struct gfs2_inode *ip);
Steven Whitehousec7526662006-03-20 12:30:04 -050039
Steven Whitehousecd915492006-09-04 12:49:07 -040040static inline u32 gfs2_disk_hash(const char *data, int len)
Steven Whitehouse71b86f52006-03-28 14:14:04 -050041{
Steven Whitehouse2bdbc5d2006-09-05 09:34:20 -040042 return crc32_le((u32)~0, data, len) ^ (u32)~0;
Steven Whitehouse71b86f52006-03-28 14:14:04 -050043}
44
45
46static inline void gfs2_str2qstr(struct qstr *name, const char *fname)
47{
48 name->name = fname;
49 name->len = strlen(fname);
50 name->hash = gfs2_disk_hash(name->name, name->len);
51}
52
Steven Whitehousec7526662006-03-20 12:30:04 -050053/* N.B. This probably ought to take inum & type as args as well */
54static inline void gfs2_qstr2dirent(const struct qstr *name, u16 reclen, struct gfs2_dirent *dent)
55{
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));
Steven Whitehouse2bdbc5d2006-09-05 09:34:20 -040063 memcpy(dent + 1, name->name, name->len);
Steven Whitehousec7526662006-03-20 12:30:04 -050064}
David Teiglandb3b94fa2006-01-16 16:50:04 +000065
Steven Whitehouse8d123582010-09-17 12:30:23 +010066extern struct qstr gfs2_qdot;
67extern struct qstr gfs2_qdotdot;
68
David Teiglandb3b94fa2006-01-16 16:50:04 +000069#endif /* __DIR_DOT_H__ */