projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b3b94faa DT |
1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
| 3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
| b3b94faa DT |
4 | * |
| 5 | * This copyrighted material is made available to anyone wishing to use, | |
| 6 | * modify, copy, or redistribute it subject to the terms and conditions | |
| e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
| b3b94faa DT |
8 | */ |
| 9 | ||
| 10 | #ifndef __DIR_DOT_H__ | |
| 11 | #define __DIR_DOT_H__ | |
| 12 | ||
| f2f7ba52 | 13 | #include <linux/dcache.h> |
| b5289681 | 14 | #include <linux/crc32.h> |
| f2f7ba52 SW |
15 | |
| 16 | struct inode; | |
| 17 | struct gfs2_inode; | |
| 18 | struct gfs2_inum; | |
| 19 | ||
| 8d123585 SW |
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, | |
| 3d6ecb7d | 25 | const struct gfs2_inode *ip); |
| 855d23ce | 26 | extern int gfs2_dir_del(struct gfs2_inode *dip, const struct dentry *dentry); |
| 8d123585 SW |
27 | extern int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque, |
| 28 | filldir_t filldir); | |
| 29 | extern int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename, | |
| 30 | const struct gfs2_inode *nip, unsigned int new_type); | |
| b3b94faa | 31 | |
| 8d123585 | 32 | extern int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip); |
| b3b94faa | 33 | |
| 8d123585 SW |
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); | |
| c752666c | 38 | |
| cd915493 | 39 | static inline u32 gfs2_disk_hash(const char *data, int len) |
| 71b86f56 | 40 | { |
| 2bdbc5d7 | 41 | return crc32_le((u32)~0, data, len) ^ (u32)~0; |
| 71b86f56 SW |
42 | } |
| 43 | ||
| 44 | ||
| 45 | static inline void gfs2_str2qstr(struct qstr *name, const char *fname) | |
| 46 | { | |
| 47 | name->name = fname; | |
| 48 | name->len = strlen(fname); | |
| 49 | name->hash = gfs2_disk_hash(name->name, name->len); | |
| 50 | } | |
| 51 | ||
| c752666c SW |
52 | /* N.B. This probably ought to take inum & type as args as well */ |
| 53 | static inline void gfs2_qstr2dirent(const struct qstr *name, u16 reclen, struct gfs2_dirent *dent) | |
| 54 | { | |
| 55 | dent->de_inum.no_addr = cpu_to_be64(0); | |
| 56 | dent->de_inum.no_formal_ino = cpu_to_be64(0); | |
| 57 | dent->de_hash = cpu_to_be32(name->hash); | |
| 58 | dent->de_rec_len = cpu_to_be16(reclen); | |
| 59 | dent->de_name_len = cpu_to_be16(name->len); | |
| 60 | dent->de_type = cpu_to_be16(0); | |
| 61 | memset(dent->__pad, 0, sizeof(dent->__pad)); | |
| 2bdbc5d7 | 62 | memcpy(dent + 1, name->name, name->len); |
| c752666c | 63 | } |
| b3b94faa | 64 | |
| 8d123585 SW |
65 | extern struct qstr gfs2_qdot; |
| 66 | extern struct qstr gfs2_qdotdot; | |
| 67 | ||
| b3b94faa | 68 | #endif /* __DIR_DOT_H__ */ |