mirror of
https://github.com/linux-apfs/linux-apfs-oot.git
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93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* linux/fs/apfs/object.h
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*
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* Copyright (C) 2018 Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
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*/
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#ifndef _APFS_OBJECT_H
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#define _APFS_OBJECT_H
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#include <linux/types.h>
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/* Object identifiers constants */
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#define APFS_OID_NX_SUPERBLOCK 1
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#define APFS_OID_INVALID 0ULL
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#define APFS_OID_RESERVED_COUNT 1024
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/* Object type masks */
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#define APFS_OBJECT_TYPE_MASK 0x0000ffff
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#define APFS_OBJECT_TYPE_FLAGS_MASK 0xffff0000
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#define APFS_OBJ_STORAGETYPE_MASK 0xc0000000
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#define APFS_OBJECT_TYPE_FLAGS_DEFINED_MASK 0xf8000000
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/* Object types */
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#define APFS_OBJECT_TYPE_NX_SUPERBLOCK 0x00000001
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#define APFS_OBJECT_TYPE_BTREE 0x00000002
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#define APFS_OBJECT_TYPE_BTREE_NODE 0x00000003
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#define APFS_OBJECT_TYPE_SPACEMAN 0x00000005
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#define APFS_OBJECT_TYPE_SPACEMAN_CAB 0x00000006
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#define APFS_OBJECT_TYPE_SPACEMAN_CIB 0x00000007
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#define APFS_OBJECT_TYPE_SPACEMAN_BITMAP 0x00000008
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#define APFS_OBJECT_TYPE_SPACEMAN_FREE_QUEUE 0x00000009
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#define APFS_OBJECT_TYPE_EXTENT_LIST_TREE 0x0000000a
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#define APFS_OBJECT_TYPE_OMAP 0x0000000b
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#define APFS_OBJECT_TYPE_CHECKPOINT_MAP 0x0000000c
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#define APFS_OBJECT_TYPE_FS 0x0000000d
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#define APFS_OBJECT_TYPE_FSTREE 0x0000000e
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#define APFS_OBJECT_TYPE_BLOCKREFTREE 0x0000000f
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#define APFS_OBJECT_TYPE_SNAPMETATREE 0x00000010
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#define APFS_OBJECT_TYPE_NX_REAPER 0x00000011
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#define APFS_OBJECT_TYPE_NX_REAP_LIST 0x00000012
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#define APFS_OBJECT_TYPE_OMAP_SNAPSHOT 0x00000013
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#define APFS_OBJECT_TYPE_EFI_JUMPSTART 0x00000014
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#define APFS_OBJECT_TYPE_FUSION_MIDDLE_TREE 0x00000015
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#define APFS_OBJECT_TYPE_NX_FUSION_WBC 0x00000016
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#define APFS_OBJECT_TYPE_NX_FUSION_WBC_LIST 0x00000017
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#define APFS_OBJECT_TYPE_ER_STATE 0x00000018
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#define APFS_OBJECT_TYPE_GBITMAP 0x00000019
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#define APFS_OBJECT_TYPE_GBITMAP_TREE 0x0000001a
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#define APFS_OBJECT_TYPE_GBITMAP_BLOCK 0x0000001b
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#define APFS_OBJECT_TYPE_INVALID 0x00000000
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#define APFS_OBJECT_TYPE_TEST 0x000000ff
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/* Object type flags */
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#define APFS_OBJ_VIRTUAL 0x00000000
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#define APFS_OBJ_EPHEMERAL 0x80000000
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#define APFS_OBJ_PHYSICAL 0x40000000
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#define APFS_OBJ_NOHEADER 0x20000000
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#define APFS_OBJ_ENCRYPTED 0x10000000
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#define APFS_OBJ_NONPERSISTENT 0x08000000
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/*
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* On-disk representation of an APFS object
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*/
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struct apfs_obj_phys {
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/*00*/ __le64 o_cksum; /* Fletcher checksum */
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__le64 o_oid; /* Object-id */
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/*10*/ __le64 o_xid; /* Transaction ID */
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__le32 o_type; /* Object type */
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__le32 o_subtype; /* Object subtype */
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} __packed;
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/*
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* In-memory representation of an APFS object
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*/
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struct apfs_object {
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struct super_block *sb;
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u64 block_nr;
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u64 oid; /* Often the same as the block number */
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/*
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* Buffer head containing the one block of the object. TODO: support
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* objects with more than one block.
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*/
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struct buffer_head *bh;
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};
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#define APFS_MAX_CKSUM_SIZE 8
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extern int apfs_obj_verify_csum(struct super_block *sb,
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struct apfs_obj_phys *obj);
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#endif /* _APFS_OBJECT_H */
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