projects / mirror_ubuntu-artful-kernel.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; | |
| 2b47dad8 SW |
19 | struct buffer_head; |
| 20 | struct gfs2_dirent; | |
| f2f7ba52 | 21 | |
| 3c1c0ae1 SW |
22 | struct gfs2_diradd { |
| 23 | unsigned nr_blocks; | |
| 2b47dad8 SW |
24 | struct gfs2_dirent *dent; |
| 25 | struct buffer_head *bh; | |
| 19aeb5a6 | 26 | int save_loc; |
| 3c1c0ae1 SW |
27 | }; |
| 28 | ||
| 8d123585 | 29 | extern struct inode *gfs2_dir_search(struct inode *dir, |
| 5a00f3cc SW |
30 | const struct qstr *filename, |
| 31 | bool fail_on_exist); | |
| 8d123585 SW |
32 | extern int gfs2_dir_check(struct inode *dir, const struct qstr *filename, |
| 33 | const struct gfs2_inode *ip); | |
| 34 | extern int gfs2_dir_add(struct inode *inode, const struct qstr *filename, | |
| 2b47dad8 SW |
35 | const struct gfs2_inode *ip, struct gfs2_diradd *da); |
| 36 | static inline void gfs2_dir_no_add(struct gfs2_diradd *da) | |
| 37 | { | |
| 38 | if (da->bh) | |
| 39 | brelse(da->bh); | |
| 40 | da->bh = NULL; | |
| 41 | } | |
| 855d23ce | 42 | extern int gfs2_dir_del(struct gfs2_inode *dip, const struct dentry *dentry); |
| d81a8ef5 AV |
43 | extern int gfs2_dir_read(struct inode *inode, struct dir_context *ctx, |
| 44 | struct file_ra_state *f_ra); | |
| 8d123585 SW |
45 | extern int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename, |
| 46 | const struct gfs2_inode *nip, unsigned int new_type); | |
| b3b94faa | 47 | |
| 8d123585 | 48 | extern int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip); |
| b3b94faa | 49 | |
| 8d123585 | 50 | extern int gfs2_diradd_alloc_required(struct inode *dir, |
| 3c1c0ae1 SW |
51 | const struct qstr *filename, |
| 52 | struct gfs2_diradd *da); | |
| 8d123585 SW |
53 | extern int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block, |
| 54 | struct buffer_head **bhp); | |
| 17d539f0 | 55 | extern void gfs2_dir_hash_inval(struct gfs2_inode *ip); |
| c752666c | 56 | |
| cd915493 | 57 | static inline u32 gfs2_disk_hash(const char *data, int len) |
| 71b86f56 | 58 | { |
| 2bdbc5d7 | 59 | return crc32_le((u32)~0, data, len) ^ (u32)~0; |
| 71b86f56 SW |
60 | } |
| 61 | ||
| 62 | ||
| 63 | static inline void gfs2_str2qstr(struct qstr *name, const char *fname) | |
| 64 | { | |
| 65 | name->name = fname; | |
| 66 | name->len = strlen(fname); | |
| 67 | name->hash = gfs2_disk_hash(name->name, name->len); | |
| 68 | } | |
| 69 | ||
| c752666c SW |
70 | /* N.B. This probably ought to take inum & type as args as well */ |
| 71 | static inline void gfs2_qstr2dirent(const struct qstr *name, u16 reclen, struct gfs2_dirent *dent) | |
| 72 | { | |
| 73 | dent->de_inum.no_addr = cpu_to_be64(0); | |
| 74 | dent->de_inum.no_formal_ino = cpu_to_be64(0); | |
| 75 | dent->de_hash = cpu_to_be32(name->hash); | |
| 76 | dent->de_rec_len = cpu_to_be16(reclen); | |
| 77 | dent->de_name_len = cpu_to_be16(name->len); | |
| 78 | dent->de_type = cpu_to_be16(0); | |
| 79 | memset(dent->__pad, 0, sizeof(dent->__pad)); | |
| 2bdbc5d7 | 80 | memcpy(dent + 1, name->name, name->len); |
| c752666c | 81 | } |
| b3b94faa | 82 | |
| 8d123585 SW |
83 | extern struct qstr gfs2_qdot; |
| 84 | extern struct qstr gfs2_qdotdot; | |
| 85 | ||
| b3b94faa | 86 | #endif /* __DIR_DOT_H__ */ |