GetDecmpfsHeader parses the decmpfs header from an xattr node entry.

NewFSTree returns a new FSTree.

ReadObj returns a verified object or error if block does not verify.

* Optional Volume Feature Flags **/.

* Volume Flags **/.

* Partition UUIDs **/.

* Incompatible Volume Feature Flags **/.

* Volume Reaper States **/.

* Integrity Metadata Flags **/.

* Read-Only Comaptible Volume Feature Flags **/.

~0ULL.

= 0x0180.

= 0x0080 --- formerly defined explicitly as `0x0080`.

= 0x0040 --- formerly defined explicitly as `0x0040`.

= 0x0240.

= 0x0140.

* Volume Roles **/.

= 0x02c0.

= 0x0280.

= 0x01c0 --- spec also uses the name `APFS_VOL_ROLE_SIDECAR`, but that could be an error.

= 0x0200 --- formerly named `APFS_VOL_ROLE_RESERVED_200`.

= 0x00c0.

= 0x0100.

writes to file may only append */.

A block-special file.

* B-Tree Node Flags **/.

The table of contents is allowed to contain keys that have no corresponding value.

The nodes in the B-tree use ephemeral object identifiers to link to child nodes.

The nonleaf nodes of this B-tree store a hash of their child nodes.

The keys and values in the B-tree arenʼt required to be aligned to eight-byte boundaries.

= 4 Ki.

The nodes of this B-tree are stored without object headers.

The B-tree isnʼt persisted across unmounting.

The nodes in the B-tree use physical object identifiers to link to child nodes.

Code that works with the B-tree should enable optimizations to keep the B-tree compact during sequential insertion of entries.

* B-Tree Table of Contents Constants **/.

Code that works with the B-tree should enable optimizations to make comparison of keys fast.

* Checkpoint Flags **/.

A character-special file.

* Chunk Info Block Constants **/.

https://opensource.apple.com/source/copyfile/copyfile-138/copyfile.c.auto.html.

https://opensource.apple.com/source/copyfile/copyfile-138/copyfile.c.auto.html.

* case 5: specifies de-dup within the generation store.

uncompressed data in xattr (similar to but not identical to CMP_Type1).

https://opensource.apple.com/source/copyfile/copyfile-138/copyfile.c.auto.html.

Highest compression_type supported.

64k blocks.

64k blocks.

64k blocks.

64k chunked uncompressed data in resource fork.

64k blocks.

Uncompressed data in xattr.

file is compressed (some file-systems) */.

* Encryption Identifiers **/.

entitlement required for reading and writing */.

0x636d7066.

A directory.

* Extended-Field Types **/.

A block-special file.

A character-special file.

A directory.

A named pipe.

A symbolic link.

A regular file.

A socket.

* Directory Entry File Types **/.

A whiteout.

* Encryption-Rolling Checksum Block Sizes **/.

* Encryption-Rolling Constants **/.

* Encryption Rolling Flags **/.

* File Extent Constants **/.

A named pipe.

* Fusion Middle-Tree Flags **/.

* Address Markers **/.

hint that this item should not be displayed in a GUI */.

file may not be changed */.

* Integrity Metadata Version Constants **/.

* Integrity Metadata Version Constants **/.

* Integrity Metadata Version Constants **/.

* Integrity Metadata Version Constants **/.

* Inode Numbers **/.

Spec incorrectly says `0xfffff400`.

= 3 Ki + 736.

* Keybag Tags **/.

A symbolic link.

do not dump file */.

file may not be removed or renamed */.

Reserved.

The current object is being reaped.

* Reaper List Flags **/.

* Reaper List Entry Flags **/.

= 4 Ki.

* Optional Container Feature Flags **/.

* Incompatible Container Feature Flags **/.

= 64 Ki.

= 4 Ki.

= 1024 Ki = 1 Mi.

* Container Flags **/.

* Read-Only Compatible Container Feature Flags **/.

* Object Type Flags **/.

new in 2020-06-22.

* Object Map Flags **/.

* Object Map Constants **/.

* Object Map Reaper Phases **/.

* Snapshot Flags **/.

* Object Map Value Flags **/.

directory is opaque wrt.

* File-System Object Constants **/.

* Protection Classes **/.

A regular file.

The bit mask used to access the file type.

writes to file may only append */.

file is archived */.

file is dataless object */.

file is a firmlink */.

file may not be changed */.

Item may not be removed, renamed or mounted on */.

entitlement required for writing */.

mask of superuser changeable flags */.

snapshot inode */.

mask of superuser supported flags */.

mask of system read-only synthetic flags */.

A socket.

* Internal-Pool Bitmap **/.

UF_TRACKED is used for dealing with document IDs.

mask of owner changeable flags */.

A whiteout.

= 3 Ki + 732.

* Extended-Field Flags **/.

ApfsReapState is a apfs_reap_state_t struct.

ApfsSuperblockT is a apfs_superblock_t struct.

BTreeInfoFixedT is a btree_info_fixed_t struct.

BTreeInfoT is a btree_info_t struct.

BTreeNodeIndexNodeValT is a btn_index_node_val_t.

BTreeNodePhys is a btree_node_phys_t struct with data array.

BTreeNodePhysT is a btree_node_phys_t struct.

CmpfRsrcHead (fields are big-endian).

DecmpfsDiskHeader this structure represents the xattr on disk; the fields below are little-endian.

DecmpfsHeader this structure represents the xattr in memory; the fields below are host-endian.

EfiJumpstart is a nx_efi_jumpstart struct.

ErRecoveryBlockPhys is a er_recovery_block_physstruct.

ErRecoveryBlockPhysT is a er_recovery_block_phys_t struct.

ErStatePhys is a er_state_phys_t struct.

ErStatePhysHeader is a er_state_phys_header_t struct.

ErStatePhysV1 is a er_state_phys (v1) struct.

ErStatePhysV1T is a er_state_phys_v1_t struct.

FusionMtVal is a fusion_mt_val_t struct.

FusionWbcListEntry is a fusion_wbc_list_entry_t struct.

FusionWbcListPhys is a fusion_wbc_list_phys struct.

FusionWbcListPhysT is a fusion_wbc_list_phys_t struct.

FusionWbcPhys is a fusion_wbc_phys_t struct.

GbitmapBlockPhys is a gbitmap_block_phys.

GbitmapBlockPhysT is a gbitmap_block_phys_t struct.

GbitmapPhys is a gbitmap_phys struct.

JKeyT is a j_key_t.

* * Custom data structure used to store a full file-system record (i.e.

KVLocT is a kvloc_t struct.

KVOffT is a kvoff_t struct.

NxEfiJumpstartT is a nx_efi_jumpstart_t struct.

NxReaperPhysT is a nx_reaper_phys_t struct.

NxReapListPhysT is a nx_reap_list_phys_t struct.

NxSuperblockT nx_superblock_t struct.

ObjPhysT is a obj_phys_t object.

OmapCleanupState is a omap_cleanup_state_t struct.

OMapEntry is a omap_entry_t struct Custom data structure used to store the key and value of an object map entry together.

OMapKey is a omap_key_t struct.

OMapPhysT is a omap_phys_t struct.

OmapReapState is a omap_reap_state_t struct.

OMapSnapshotT is a omap_snapshot_t.

OMapVal is a omap_val_t struct.

ReaperPhys is a nx_reaper_phys struct.

ReapListEntry is a nx_reap_list_entry_t struct.

ReapListPhys is a nx_reap_list_phys struct.

SiblingKeyT is a j_sibling_key_t object.

SiblingMapKeyT is a j_sibling_map_key_t object.

SiblingMapValT is a j_sibling_map_val_t object.

SiblingValT is a j_sibling_val_t object.

FSTree file system tree - credit: https://github.com/d6o/GoTree.

Printer is printer interface.

FSRecords are an array of file system records.

UUID is a uuid object.