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