[821] | 1 | /*
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| 2 | * irel.h
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| 3 | *
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| 4 | * Copyright (C) 1996, 1997 Theodore Ts'o.
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| 5 | *
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| 6 | * %Begin-Header%
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| 7 | * This file may be redistributed under the terms of the GNU Public
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| 8 | * License.
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| 9 | * %End-Header%
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| 10 | */
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| 11 |
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| 12 | struct ext2_inode_reference {
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| 13 | blk_t block;
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| 14 | __u16 offset;
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| 15 | };
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| 16 |
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| 17 | struct ext2_inode_relocate_entry {
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| 18 | ext2_ino_t new;
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| 19 | ext2_ino_t orig;
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| 20 | __u16 flags;
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| 21 | __u16 max_refs;
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| 22 | };
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| 23 |
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| 24 | typedef struct ext2_inode_relocation_table *ext2_irel;
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| 25 |
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| 26 | struct ext2_inode_relocation_table {
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| 27 | __u32 magic;
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| 28 | char *name;
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| 29 | ext2_ino_t current;
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| 30 | void *priv_data;
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| 31 |
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| 32 | /*
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| 33 | * Add an inode relocation entry.
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| 34 | */
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| 35 | errcode_t (*put)(ext2_irel irel, ext2_ino_t old,
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| 36 | struct ext2_inode_relocate_entry *ent);
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| 37 | /*
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| 38 | * Get an inode relocation entry.
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| 39 | */
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| 40 | errcode_t (*get)(ext2_irel irel, ext2_ino_t old,
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| 41 | struct ext2_inode_relocate_entry *ent);
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| 42 |
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| 43 | /*
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| 44 | * Get an inode relocation entry by its original inode number
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| 45 | */
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| 46 | errcode_t (*get_by_orig)(ext2_irel irel, ext2_ino_t orig, ext2_ino_t *old,
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| 47 | struct ext2_inode_relocate_entry *ent);
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| 48 |
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| 49 | /*
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| 50 | * Initialize for iterating over the inode relocation entries.
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| 51 | */
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| 52 | errcode_t (*start_iter)(ext2_irel irel);
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| 53 |
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| 54 | /*
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| 55 | * The iterator function for the inode relocation entries.
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| 56 | * Returns an inode number of 0 when out of entries.
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| 57 | */
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| 58 | errcode_t (*next)(ext2_irel irel, ext2_ino_t *old,
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| 59 | struct ext2_inode_relocate_entry *ent);
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| 60 |
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| 61 | /*
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| 62 | * Add an inode reference (i.e., note the fact that a
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| 63 | * particular block/offset contains a reference to an inode)
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| 64 | */
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| 65 | errcode_t (*add_ref)(ext2_irel irel, ext2_ino_t ino,
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| 66 | struct ext2_inode_reference *ref);
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| 67 |
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| 68 | /*
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| 69 | * Initialize for iterating over the inode references for a
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| 70 | * particular inode.
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| 71 | */
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| 72 | errcode_t (*start_iter_ref)(ext2_irel irel, ext2_ino_t ino);
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| 73 |
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| 74 | /*
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| 75 | * The iterator function for the inode references for an
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| 76 | * inode. The references for only one inode can be interator
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| 77 | * over at a time, as the iterator state is stored in ext2_irel.
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| 78 | */
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| 79 | errcode_t (*next_ref)(ext2_irel irel,
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| 80 | struct ext2_inode_reference *ref);
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| 81 |
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| 82 | /*
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| 83 | * Move the inode relocation table from one inode number to
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| 84 | * another. Note that the inode references also must move.
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| 85 | */
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| 86 | errcode_t (*move)(ext2_irel irel, ext2_ino_t old, ext2_ino_t new);
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| 87 |
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| 88 | /*
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| 89 | * Remove an inode relocation entry, along with all of the
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| 90 | * inode references.
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| 91 | */
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| 92 | errcode_t (*delete)(ext2_irel irel, ext2_ino_t old);
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| 93 |
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| 94 | /*
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| 95 | * Free the inode relocation table.
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| 96 | */
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| 97 | errcode_t (*free)(ext2_irel irel);
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| 98 | };
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| 99 |
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| 100 | errcode_t ext2fs_irel_memarray_create(char *name, ext2_ino_t max_inode,
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| 101 | ext2_irel *irel);
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| 102 |
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| 103 | #define ext2fs_irel_put(irel, old, ent) ((irel)->put((irel), old, ent))
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| 104 | #define ext2fs_irel_get(irel, old, ent) ((irel)->get((irel), old, ent))
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| 105 | #define ext2fs_irel_get_by_orig(irel, orig, old, ent) \
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| 106 | ((irel)->get_by_orig((irel), orig, old, ent))
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| 107 | #define ext2fs_irel_start_iter(irel) ((irel)->start_iter((irel)))
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| 108 | #define ext2fs_irel_next(irel, old, ent) ((irel)->next((irel), old, ent))
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| 109 | #define ext2fs_irel_add_ref(irel, ino, ref) ((irel)->add_ref((irel), ino, ref))
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| 110 | #define ext2fs_irel_start_iter_ref(irel, ino) ((irel)->start_iter_ref((irel), ino))
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| 111 | #define ext2fs_irel_next_ref(irel, ref) ((irel)->next_ref((irel), ref))
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| 112 | #define ext2fs_irel_move(irel, old, new) ((irel)->move((irel), old, new))
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| 113 | #define ext2fs_irel_delete(irel, old) ((irel)->delete((irel), old))
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| 114 | #define ext2fs_irel_free(irel) ((irel)->free((irel)))
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