119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o/* 219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * irel.h 3efc6f628e15de95bcd13e4f0ee223cb42115d520Theodore Ts'o * 419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Copyright (C) 1996, 1997 Theodore Ts'o. 519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * 619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * %Begin-Header% 7543547a52a20cb7e69d74921b2f691078fd55d83Theodore Ts'o * This file may be redistributed under the terms of the GNU Library 8543547a52a20cb7e69d74921b2f691078fd55d83Theodore Ts'o * General Public License, version 2. 919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * %End-Header% 1019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 1119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 1219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'ostruct ext2_inode_reference { 13e0ed7404719a9ddd2ba427a80db5365c8bad18c0JP Abgrall blk64_t block; 1419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o __u16 offset; 1519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o}; 1619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 1719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'ostruct ext2_inode_relocate_entry { 1831dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o ext2_ino_t new; 1931dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o ext2_ino_t orig; 2031dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o __u16 flags; 2131dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o __u16 max_refs; 2219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o}; 2319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 2419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'otypedef struct ext2_inode_relocation_table *ext2_irel; 2519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 2619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'ostruct ext2_inode_relocation_table { 2719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o __u32 magic; 2819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o char *name; 2931dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o ext2_ino_t current; 30b5abe6fac9c9e7caf4710501d1657d30e4857ef6Theodore Ts'o void *priv_data; 3119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 3219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 3319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Add an inode relocation entry. 3419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 3531dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o errcode_t (*put)(ext2_irel irel, ext2_ino_t old, 3619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o struct ext2_inode_relocate_entry *ent); 3719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 3819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Get an inode relocation entry. 3919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 4031dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o errcode_t (*get)(ext2_irel irel, ext2_ino_t old, 4119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o struct ext2_inode_relocate_entry *ent); 4219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 4319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 4419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Get an inode relocation entry by its original inode number 4519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 4631dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o errcode_t (*get_by_orig)(ext2_irel irel, ext2_ino_t orig, ext2_ino_t *old, 4719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o struct ext2_inode_relocate_entry *ent); 4819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 4919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 5019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Initialize for iterating over the inode relocation entries. 5119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 5219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o errcode_t (*start_iter)(ext2_irel irel); 5319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 5419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 5519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * The iterator function for the inode relocation entries. 5619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Returns an inode number of 0 when out of entries. 5719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 5831dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o errcode_t (*next)(ext2_irel irel, ext2_ino_t *old, 5919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o struct ext2_inode_relocate_entry *ent); 6019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 6119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 6219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Add an inode reference (i.e., note the fact that a 6319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * particular block/offset contains a reference to an inode) 6419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 6531dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o errcode_t (*add_ref)(ext2_irel irel, ext2_ino_t ino, 6619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o struct ext2_inode_reference *ref); 6719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 6819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 6919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Initialize for iterating over the inode references for a 7019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * particular inode. 7119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 7231dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o errcode_t (*start_iter_ref)(ext2_irel irel, ext2_ino_t ino); 7319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 7419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 7519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * The iterator function for the inode references for an 7619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * inode. The references for only one inode can be interator 7719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * over at a time, as the iterator state is stored in ext2_irel. 7819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 7919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o errcode_t (*next_ref)(ext2_irel irel, 8019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o struct ext2_inode_reference *ref); 8119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 8219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 8319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Move the inode relocation table from one inode number to 8419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * another. Note that the inode references also must move. 8519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 8631dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o errcode_t (*move)(ext2_irel irel, ext2_ino_t old, ext2_ino_t new); 8719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 8819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 8919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Remove an inode relocation entry, along with all of the 9019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * inode references. 9119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 9231dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'o errcode_t (*delete)(ext2_irel irel, ext2_ino_t old); 9319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 9419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o /* 9519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o * Free the inode relocation table. 9619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o */ 9719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o errcode_t (*free)(ext2_irel irel); 9819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o}; 9919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 10031dbecd482405e0d3a67eb58e1a1c8cb9f2ad83eTheodore Ts'oerrcode_t ext2fs_irel_memarray_create(char *name, ext2_ino_t max_inode, 10119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ext2_irel *irel); 10219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o 10319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_put(irel, old, ent) ((irel)->put((irel), old, ent)) 10419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_get(irel, old, ent) ((irel)->get((irel), old, ent)) 10519c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_get_by_orig(irel, orig, old, ent) \ 10619c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o ((irel)->get_by_orig((irel), orig, old, ent)) 10719c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_start_iter(irel) ((irel)->start_iter((irel))) 10819c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_next(irel, old, ent) ((irel)->next((irel), old, ent)) 10919c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_add_ref(irel, ino, ref) ((irel)->add_ref((irel), ino, ref)) 11019c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_start_iter_ref(irel, ino) ((irel)->start_iter_ref((irel), ino)) 11119c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_next_ref(irel, ref) ((irel)->next_ref((irel), ref)) 11219c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_move(irel, old, new) ((irel)->move((irel), old, new)) 11319c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_delete(irel, old) ((irel)->delete((irel), old)) 11419c78dc07fce2d6f39b5e541562afc3ca1ea38ffTheodore Ts'o#define ext2fs_irel_free(irel) ((irel)->free((irel))) 115