1/* vi: set sw=4 ts=4: */ 2/* 3 * irel.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 13struct ext2_inode_reference { 14 blk_t block; 15 __u16 offset; 16}; 17 18struct ext2_inode_relocate_entry { 19 ext2_ino_t new; 20 ext2_ino_t orig; 21 __u16 flags; 22 __u16 max_refs; 23}; 24 25typedef struct ext2_inode_relocation_table *ext2_irel; 26 27struct ext2_inode_relocation_table { 28 __u32 magic; 29 char *name; 30 ext2_ino_t current; 31 void *priv_data; 32 33 /* 34 * Add an inode relocation entry. 35 */ 36 errcode_t (*put)(ext2_irel irel, ext2_ino_t old, 37 struct ext2_inode_relocate_entry *ent); 38 /* 39 * Get an inode relocation entry. 40 */ 41 errcode_t (*get)(ext2_irel irel, ext2_ino_t old, 42 struct ext2_inode_relocate_entry *ent); 43 44 /* 45 * Get an inode relocation entry by its original inode number 46 */ 47 errcode_t (*get_by_orig)(ext2_irel irel, ext2_ino_t orig, ext2_ino_t *old, 48 struct ext2_inode_relocate_entry *ent); 49 50 /* 51 * Initialize for iterating over the inode relocation entries. 52 */ 53 errcode_t (*start_iter)(ext2_irel irel); 54 55 /* 56 * The iterator function for the inode relocation entries. 57 * Returns an inode number of 0 when out of entries. 58 */ 59 errcode_t (*next)(ext2_irel irel, ext2_ino_t *old, 60 struct ext2_inode_relocate_entry *ent); 61 62 /* 63 * Add an inode reference (i.e., note the fact that a 64 * particular block/offset contains a reference to an inode) 65 */ 66 errcode_t (*add_ref)(ext2_irel irel, ext2_ino_t ino, 67 struct ext2_inode_reference *ref); 68 69 /* 70 * Initialize for iterating over the inode references for a 71 * particular inode. 72 */ 73 errcode_t (*start_iter_ref)(ext2_irel irel, ext2_ino_t ino); 74 75 /* 76 * The iterator function for the inode references for an 77 * inode. The references for only one inode can be interator 78 * over at a time, as the iterator state is stored in ext2_irel. 79 */ 80 errcode_t (*next_ref)(ext2_irel irel, 81 struct ext2_inode_reference *ref); 82 83 /* 84 * Move the inode relocation table from one inode number to 85 * another. Note that the inode references also must move. 86 */ 87 errcode_t (*move)(ext2_irel irel, ext2_ino_t old, ext2_ino_t new); 88 89 /* 90 * Remove an inode relocation entry, along with all of the 91 * inode references. 92 */ 93 errcode_t (*delete)(ext2_irel irel, ext2_ino_t old); 94 95 /* 96 * Free the inode relocation table. 97 */ 98 errcode_t (*free)(ext2_irel irel); 99}; 100 101errcode_t ext2fs_irel_memarray_create(char *name, ext2_ino_t max_inode, 102 ext2_irel *irel); 103 104#define ext2fs_irel_put(irel, old, ent) ((irel)->put((irel), old, ent)) 105#define ext2fs_irel_get(irel, old, ent) ((irel)->get((irel), old, ent)) 106#define ext2fs_irel_get_by_orig(irel, orig, old, ent) \ 107 ((irel)->get_by_orig((irel), orig, old, ent)) 108#define ext2fs_irel_start_iter(irel) ((irel)->start_iter((irel))) 109#define ext2fs_irel_next(irel, old, ent) ((irel)->next((irel), old, ent)) 110#define ext2fs_irel_add_ref(irel, ino, ref) ((irel)->add_ref((irel), ino, ref)) 111#define ext2fs_irel_start_iter_ref(irel, ino) ((irel)->start_iter_ref((irel), ino)) 112#define ext2fs_irel_next_ref(irel, ref) ((irel)->next_ref((irel), ref)) 113#define ext2fs_irel_move(irel, old, new) ((irel)->move((irel), old, new)) 114#define ext2fs_irel_delete(irel, old) ((irel)->delete((irel), old)) 115#define ext2fs_irel_free(irel) ((irel)->free((irel))) 116