| Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * brel.h |
| 4 | * |
| 5 | * Copyright (C) 1996, 1997 Theodore Ts'o. |
| 6 | * |
| 7 | * %Begin-Header% |
| 8 | * This file may be redistributed under the terms of the GNU Public |
| 9 | * License. |
| 10 | * %End-Header% |
| 11 | */ |
| 12 | |
| 13 | struct ext2_block_relocate_entry { |
| 14 | blk_t new; |
| 15 | __s16 offset; |
| 16 | __u16 flags; |
| 17 | union { |
| 18 | blk_t block_ref; |
| 19 | ext2_ino_t inode_ref; |
| 20 | } owner; |
| 21 | }; |
| 22 | |
| 23 | #define RELOCATE_TYPE_REF 0x0007 |
| 24 | #define RELOCATE_BLOCK_REF 0x0001 |
| 25 | #define RELOCATE_INODE_REF 0x0002 |
| 26 | |
| 27 | typedef struct ext2_block_relocation_table *ext2_brel; |
| 28 | |
| 29 | struct ext2_block_relocation_table { |
| 30 | __u32 magic; |
| 31 | char *name; |
| 32 | blk_t current; |
| 33 | void *priv_data; |
| 34 | |
| 35 | /* |
| 36 | * Add a block relocation entry. |
| 37 | */ |
| 38 | errcode_t (*put)(ext2_brel brel, blk_t old, |
| 39 | struct ext2_block_relocate_entry *ent); |
| 40 | |
| 41 | /* |
| 42 | * Get a block relocation entry. |
| 43 | */ |
| 44 | errcode_t (*get)(ext2_brel brel, blk_t old, |
| 45 | struct ext2_block_relocate_entry *ent); |
| 46 | |
| 47 | /* |
| 48 | * Initialize for iterating over the block relocation entries. |
| 49 | */ |
| 50 | errcode_t (*start_iter)(ext2_brel brel); |
| 51 | |
| 52 | /* |
| 53 | * The iterator function for the inode relocation entries. |
| 54 | * Returns an inode number of 0 when out of entries. |
| 55 | */ |
| 56 | errcode_t (*next)(ext2_brel brel, blk_t *old, |
| 57 | struct ext2_block_relocate_entry *ent); |
| 58 | |
| 59 | /* |
| 60 | * Move the inode relocation table from one block number to |
| 61 | * another. |
| 62 | */ |
| 63 | errcode_t (*move)(ext2_brel brel, blk_t old, blk_t new); |
| 64 | |
| 65 | /* |
| 66 | * Remove a block relocation entry. |
| 67 | */ |
| 68 | errcode_t (*delete)(ext2_brel brel, blk_t old); |
| 69 | |
| 70 | |
| 71 | /* |
| 72 | * Free the block relocation table. |
| 73 | */ |
| 74 | errcode_t (*free)(ext2_brel brel); |
| 75 | }; |
| 76 | |
| 77 | errcode_t ext2fs_brel_memarray_create(char *name, blk_t max_block, |
| 78 | ext2_brel *brel); |
| 79 | |
| 80 | #define ext2fs_brel_put(brel, old, ent) ((brel)->put((brel), old, ent)) |
| 81 | #define ext2fs_brel_get(brel, old, ent) ((brel)->get((brel), old, ent)) |
| 82 | #define ext2fs_brel_start_iter(brel) ((brel)->start_iter((brel))) |
| 83 | #define ext2fs_brel_next(brel, old, ent) ((brel)->next((brel), old, ent)) |
| 84 | #define ext2fs_brel_move(brel, old, new) ((brel)->move((brel), old, new)) |
| 85 | #define ext2fs_brel_delete(brel, old) ((brel)->delete((brel), old)) |
| 86 | #define ext2fs_brel_free(brel) ((brel)->free((brel))) |
| 87 | |