David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Steven Whitehouse | 3a8a9a1 | 2006-05-18 15:09:15 -0400 | [diff] [blame] | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 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 |
| 7 | * of the GNU General Public License v.2. |
| 8 | */ |
| 9 | |
| 10 | #ifndef __DIR_DOT_H__ |
| 11 | #define __DIR_DOT_H__ |
| 12 | |
| 13 | /** |
| 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 |
| 21 | * |
| 22 | * Returns: 0 on success, 1 if buffer full |
| 23 | */ |
| 24 | |
| 25 | typedef int (*gfs2_filldir_t) (void *opaque, |
| 26 | const char *name, unsigned int length, |
| 27 | uint64_t offset, |
| 28 | struct gfs2_inum *inum, unsigned int type); |
| 29 | |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 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); |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 35 | int gfs2_dir_read(struct inode *inode, uint64_t * offset, void *opaque, |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 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); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 39 | |
| 40 | int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip); |
| 41 | |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 42 | int gfs2_diradd_alloc_required(struct inode *dir, |
| 43 | const struct qstr *filename); |
Steven Whitehouse | 61e085a | 2006-04-24 10:07:13 -0400 | [diff] [blame] | 44 | int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, uint64_t block, |
| 45 | struct buffer_head **bhp); |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 46 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 47 | static inline uint32_t gfs2_disk_hash(const char *data, int len) |
| 48 | { |
| 49 | return crc32_le(0xFFFFFFFF, data, len) ^ 0xFFFFFFFF; |
| 50 | } |
| 51 | |
| 52 | |
| 53 | static inline void gfs2_str2qstr(struct qstr *name, const char *fname) |
| 54 | { |
| 55 | name->name = fname; |
| 56 | name->len = strlen(fname); |
| 57 | name->hash = gfs2_disk_hash(name->name, name->len); |
| 58 | } |
| 59 | |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 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) |
| 62 | { |
| 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); |
| 71 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 72 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 73 | #endif /* __DIR_DOT_H__ */ |