* Copyright 2008-2010, Axel Dörfler, axeld@pinc-software.de.
* Distributed under the terms of the MIT License.
*/
#ifndef EXT2_H
#define EXT2_H
#include <sys/stat.h>
#include <ByteOrder.h>
#include <fs_interface.h>
#include <KernelExport.h>
typedef uint64 fileblock_t;
typedef uint64 fsblock_t;
#define EXT2_SUPER_BLOCK_OFFSET 1024
struct ext2_super_block {
uint32 num_inodes;
uint32 num_blocks;
uint32 reserved_blocks;
uint32 free_blocks;
uint32 free_inodes;
uint32 first_data_block;
uint32 block_shift;
uint32 fragment_shift;
uint32 blocks_per_group;
uint32 fragments_per_group;
uint32 inodes_per_group;
uint32 mount_time;
uint32 write_time;
uint16 mount_count;
uint16 max_mount_count;
uint16 magic;
uint16 state;
uint16 error_handling;
uint16 minor_revision_level;
uint32 last_check_time;
uint32 check_interval;
uint32 creator_os;
uint32 revision_level;
uint16 reserved_blocks_uid;
uint16 reserved_blocks_gid;
uint32 first_inode;
uint16 inode_size;
uint16 block_group;
uint32 compatible_features;
uint32 incompatible_features;
uint32 read_only_features;
uint8 uuid[16];
char name[16];
char last_mount_point[64];
uint32 algorithm_usage_bitmap;
uint8 preallocated_blocks;
uint8 preallocated_directory_blocks;
uint16 reserved_gdt_blocks;
uint8 journal_uuid[16];
uint32 journal_inode;
uint32 journal_device;
uint32 last_orphan;
uint32 hash_seed[4];
uint8 default_hash_version;
uint8 _reserved1;
uint16 group_descriptor_size;
uint32 default_mount_options;
uint32 first_meta_block_group;
uint32 fs_creation_time;
uint32 journal_inode_backup[17];
uint32 num_blocks_high;
uint32 reserved_blocks_high;
uint32 free_blocks_high;
uint16 min_inode_size;
uint16 want_inode_size;
uint32 flags;
uint16 raid_stride;
uint16 mmp_interval;
uint64 mmp_block;
uint32 raid_stripe_width;
uint8 groups_per_flex_shift;
uint8 checksum_type;
uint16 _reserved4;
uint64 kb_written;
uint32 _reserved5[60];
uint32 checksum_seed;
uint32 _reserved6[98];
uint32 checksum;
uint16 Magic() const { return B_LENDIAN_TO_HOST_INT16(magic); }
uint16 State() const { return B_LENDIAN_TO_HOST_INT16(state); }
uint32 RevisionLevel() const { return B_LENDIAN_TO_HOST_INT16(revision_level); }
uint32 BlockShift() const { return B_LENDIAN_TO_HOST_INT32(block_shift) + 10; }
uint32 NumInodes() const { return B_LENDIAN_TO_HOST_INT32(num_inodes); }
uint64 NumBlocks(bool has64bits) const
{
uint64 blocks = B_LENDIAN_TO_HOST_INT32(num_blocks);
if (has64bits)
blocks |= ((uint64)B_LENDIAN_TO_HOST_INT32(num_blocks_high) << 32);
return blocks;
}
uint32 FreeInodes() const { return B_LENDIAN_TO_HOST_INT32(free_inodes); }
uint64 FreeBlocks(bool has64bits) const
{
uint64 blocks = B_LENDIAN_TO_HOST_INT32(free_blocks);
if (has64bits)
blocks |= ((uint64)B_LENDIAN_TO_HOST_INT32(free_blocks_high) << 32);
return blocks;
}
uint64 ReservedBlocks(bool has64bits) const
{
uint64 blocks = B_LENDIAN_TO_HOST_INT32(reserved_blocks);
if (has64bits)
blocks |= ((uint64)B_LENDIAN_TO_HOST_INT32(reserved_blocks_high) << 32);
return blocks;
}
uint16 InodeSize() const { return B_LENDIAN_TO_HOST_INT16(inode_size); }
uint32 FirstDataBlock() const
{ return B_LENDIAN_TO_HOST_INT32(first_data_block); }
uint32 BlocksPerGroup() const
{ return B_LENDIAN_TO_HOST_INT32(blocks_per_group); }
uint32 FragmentsPerGroup() const
{ return B_LENDIAN_TO_HOST_INT32(fragments_per_group); }
uint32 InodesPerGroup() const
{ return B_LENDIAN_TO_HOST_INT32(inodes_per_group); }
uint32 FirstMetaBlockGroup() const
{ return B_LENDIAN_TO_HOST_INT32(first_meta_block_group); }
uint32 CompatibleFeatures() const
{ return B_LENDIAN_TO_HOST_INT32(compatible_features); }
uint32 ReadOnlyFeatures() const
{ return B_LENDIAN_TO_HOST_INT32(read_only_features); }
uint32 IncompatibleFeatures() const
{ return B_LENDIAN_TO_HOST_INT32(incompatible_features); }
uint16 ReservedGDTBlocks() const
{ return B_LENDIAN_TO_HOST_INT16(reserved_gdt_blocks); }
ino_t JournalInode() const
{ return B_LENDIAN_TO_HOST_INT32(journal_inode); }
ino_t LastOrphan() const
{ return (ino_t)B_LENDIAN_TO_HOST_INT32(last_orphan); }
uint32 HashSeed(uint8 i) const
{ return B_LENDIAN_TO_HOST_INT32(hash_seed[i]); }
uint16 GroupDescriptorSize() const
{ return B_LENDIAN_TO_HOST_INT16(group_descriptor_size); }
void SetFreeInodes(uint32 freeInodes)
{ free_inodes = B_HOST_TO_LENDIAN_INT32(freeInodes); }
void SetFreeBlocks(uint64 freeBlocks, bool has64bits)
{
free_blocks = B_HOST_TO_LENDIAN_INT32(freeBlocks & 0xffffffff);
if (has64bits)
free_blocks_high = B_HOST_TO_LENDIAN_INT32(freeBlocks >> 32);
}
void SetLastOrphan(ino_t id)
{ last_orphan = B_HOST_TO_LENDIAN_INT32((uint32)id); }
void SetReadOnlyFeatures(uint32 readOnlyFeatures)
{ read_only_features = B_HOST_TO_LENDIAN_INT32(readOnlyFeatures); }
bool IsMagicValid();
bool IsValid();
} _PACKED;
#define EXT2_OLD_REVISION 0
#define EXT2_DYNAMIC_REVISION 1
#define EXT2_MAX_REVISION EXT2_DYNAMIC_REVISION
#define EXT2_FS_STATE_VALID 0x1 // File system was cleanly unmounted
#define EXT2_FS_STATE_ERROR 0x2 // File system has errors
#define EXT2_FS_STATE_ORPHAN 0x4 // Orphans are being recovered
#define EXT2_FEATURE_DIRECTORY_PREALLOCATION 0x0001
#define EXT2_FEATURE_IMAGIC_INODES 0x0002
#define EXT2_FEATURE_HAS_JOURNAL 0x0004
#define EXT2_FEATURE_EXT_ATTR 0x0008
#define EXT2_FEATURE_RESIZE_INODE 0x0010
#define EXT2_FEATURE_DIRECTORY_INDEX 0x0020
#define EXT2_FEATURE_SPARSESUPER2 0x0200
#define EXT2_READ_ONLY_FEATURE_SPARSE_SUPER 0x0001
#define EXT2_READ_ONLY_FEATURE_LARGE_FILE 0x0002
#define EXT2_READ_ONLY_FEATURE_BTREE_DIRECTORY 0x0004
#define EXT2_READ_ONLY_FEATURE_HUGE_FILE 0x0008
#define EXT2_READ_ONLY_FEATURE_GDT_CSUM 0x0010
#define EXT2_READ_ONLY_FEATURE_DIR_NLINK 0x0020
#define EXT2_READ_ONLY_FEATURE_EXTRA_ISIZE 0x0040
#define EXT2_READ_ONLY_FEATURE_QUOTA 0x0100
#define EXT2_READ_ONLY_FEATURE_BIGALLOC 0x0200
#define EXT4_READ_ONLY_FEATURE_METADATA_CSUM 0x0400
#define EXT4_READ_ONLY_FEATURE_READONLY 0x1000
#define EXT4_READ_ONLY_FEATURE_PROJECT 0x2000
#define EXT2_INCOMPATIBLE_FEATURE_COMPRESSION 0x0001
#define EXT2_INCOMPATIBLE_FEATURE_FILE_TYPE 0x0002
#define EXT2_INCOMPATIBLE_FEATURE_RECOVER 0x0004
#define EXT2_INCOMPATIBLE_FEATURE_JOURNAL 0x0008
#define EXT2_INCOMPATIBLE_FEATURE_META_GROUP 0x0010
#define EXT2_INCOMPATIBLE_FEATURE_EXTENTS 0x0040
#define EXT2_INCOMPATIBLE_FEATURE_64BIT 0x0080
#define EXT2_INCOMPATIBLE_FEATURE_MMP 0x0100
#define EXT2_INCOMPATIBLE_FEATURE_FLEX_GROUP 0x0200
#define EXT2_INCOMPATIBLE_FEATURE_EA_INODE 0x0400
#define EXT2_INCOMPATIBLE_FEATURE_DIR_DATA 0x1000
#define EXT2_INCOMPATIBLE_FEATURE_CSUM_SEED 0x2000
#define EXT2_INCOMPATIBLE_FEATURE_LARGEDIR 0x4000
#define EXT2_INCOMPATIBLE_FEATURE_INLINE_DATA 0x8000
#define EXT2_INCOMPATIBLE_FEATURE_ENCRYPT 0x10000
#define EXT2_STATE_VALID 0x01
#define EXT2_STATE_INVALID 0x02
#define EXT2_BLOCK_GROUP_NORMAL_SIZE 32
#define EXT2_BLOCK_GROUP_INODE_UNINIT 0x1
#define EXT2_BLOCK_GROUP_BLOCK_UNINIT 0x2
struct ext2_block_group {
uint32 block_bitmap;
uint32 inode_bitmap;
uint32 inode_table;
uint16 free_blocks;
uint16 free_inodes;
uint16 used_directories;
uint16 flags;
uint32 exclude_bitmap;
uint16 block_bitmap_csum;
uint16 inode_bitmap_csum;
uint16 unused_inodes;
uint16 checksum;
uint32 block_bitmap_high;
uint32 inode_bitmap_high;
uint32 inode_table_high;
uint16 free_blocks_high;
uint16 free_inodes_high;
uint16 used_directories_high;
uint16 unused_inodes_high;
uint32 exclude_bitmap_high;
uint16 block_bitmap_csum_high;
uint16 inode_bitmap_csum_high;
uint32 _reserved;
fsblock_t BlockBitmap(bool has64bits) const
{
uint64 block = B_LENDIAN_TO_HOST_INT32(block_bitmap);
if (has64bits)
block |=
((uint64)B_LENDIAN_TO_HOST_INT32(block_bitmap_high) << 32);
return block;
}
fsblock_t InodeBitmap(bool has64bits) const
{
uint64 bitmap = B_LENDIAN_TO_HOST_INT32(inode_bitmap);
if (has64bits)
bitmap |=
((uint64)B_LENDIAN_TO_HOST_INT32(inode_bitmap_high) << 32);
return bitmap;
}
uint64 InodeTable(bool has64bits) const
{
uint64 table = B_LENDIAN_TO_HOST_INT32(inode_table);
if (has64bits)
table |= ((uint64)B_LENDIAN_TO_HOST_INT32(inode_table_high) << 32);
return table;
}
uint32 FreeBlocks(bool has64bits) const
{
uint32 blocks = B_LENDIAN_TO_HOST_INT16(free_blocks);
if (has64bits)
blocks |=
((uint32)B_LENDIAN_TO_HOST_INT16(free_blocks_high) << 16);
return blocks;
}
uint32 FreeInodes(bool has64bits) const
{
uint32 inodes = B_LENDIAN_TO_HOST_INT16(free_inodes);
if (has64bits)
inodes |=
((uint32)B_LENDIAN_TO_HOST_INT16(free_inodes_high) << 16);
return inodes;
}
uint32 UsedDirectories(bool has64bits) const
{
uint32 dirs = B_LENDIAN_TO_HOST_INT16(used_directories);
if (has64bits)
dirs |=
((uint32)B_LENDIAN_TO_HOST_INT16(used_directories_high) << 16);
return dirs;
}
uint16 Flags() const { return B_LENDIAN_TO_HOST_INT16(flags); }
uint32 UnusedInodes(bool has64bits) const
{
uint32 inodes = B_LENDIAN_TO_HOST_INT16(unused_inodes);
if (has64bits)
inodes |=
((uint32)B_LENDIAN_TO_HOST_INT16(unused_inodes_high) << 16);
return inodes;
}
void SetFreeBlocks(uint32 freeBlocks, bool has64bits)
{
free_blocks = B_HOST_TO_LENDIAN_INT16(freeBlocks) & 0xffff;
if (has64bits)
free_blocks_high = B_HOST_TO_LENDIAN_INT16(freeBlocks >> 16);
}
void SetFreeInodes(uint32 freeInodes, bool has64bits)
{
free_inodes = B_HOST_TO_LENDIAN_INT16(freeInodes) & 0xffff;
if (has64bits)
free_inodes_high = B_HOST_TO_LENDIAN_INT16(freeInodes >> 16);
}
void SetUsedDirectories(uint16 usedDirectories, bool has64bits)
{
used_directories = B_HOST_TO_LENDIAN_INT16(usedDirectories& 0xffff);
if (has64bits)
used_directories_high =
B_HOST_TO_LENDIAN_INT16(usedDirectories >> 16);
}
void SetFlags(uint16 newFlags)
{
flags = B_HOST_TO_LENDIAN_INT16(newFlags);
}
void SetUnusedInodes(uint32 unusedInodes, bool has64bits)
{
unused_inodes = B_HOST_TO_LENDIAN_INT16(unusedInodes) & 0xffff;
if (has64bits)
unused_inodes_high = B_HOST_TO_LENDIAN_INT16(unusedInodes >> 16);
}
} _PACKED;
#define EXT2_DIRECT_BLOCKS 12
#define EXT2_ROOT_NODE 2
#define EXT2_SHORT_SYMLINK_LENGTH 60
struct ext2_data_stream {
uint32 direct[EXT2_DIRECT_BLOCKS];
uint32 indirect;
uint32 double_indirect;
uint32 triple_indirect;
} _PACKED;
#define EXT2_EXTENT_MAGIC 0xf30a
#define EXT2_EXTENT_MAX_LENGTH 0x8000
struct ext2_extent_header {
uint16 magic;
uint16 num_entries;
uint16 max_entries;
uint16 depth;
uint32 generation;
bool IsValid() const
{
return B_LENDIAN_TO_HOST_INT16(magic) == EXT2_EXTENT_MAGIC;
}
uint16 NumEntries() const { return B_LENDIAN_TO_HOST_INT16(num_entries); }
uint16 MaxEntries() const { return B_LENDIAN_TO_HOST_INT16(max_entries); }
uint16 Depth() const { return B_LENDIAN_TO_HOST_INT16(depth); }
uint32 Generation() const { return B_LENDIAN_TO_HOST_INT32(generation); }
void SetNumEntries(uint16 num)
{ num_entries = B_HOST_TO_LENDIAN_INT16(num); }
void SetMaxEntries(uint16 max)
{ max_entries = B_HOST_TO_LENDIAN_INT16(max); }
void SetDepth(uint16 _depth)
{ depth = B_HOST_TO_LENDIAN_INT16(_depth); }
void SetGeneration(uint32 _generation)
{ generation = B_HOST_TO_LENDIAN_INT32(_generation); }
} _PACKED;
struct ext2_extent_tail {
uint32 checksum;
} _PACKED;
struct ext2_extent_index {
uint32 logical_block;
uint32 physical_block;
uint16 physical_block_high;
uint16 _reserved;
uint32 LogicalBlock() const
{ return B_LENDIAN_TO_HOST_INT32(logical_block); }
uint64 PhysicalBlock() const { return B_LENDIAN_TO_HOST_INT32(physical_block)
| ((uint64)B_LENDIAN_TO_HOST_INT16(physical_block_high) << 32); }
void SetLogicalBlock(uint32 block) {
logical_block = B_HOST_TO_LENDIAN_INT32(block); }
void SetPhysicalBlock(uint64 block) {
physical_block = B_HOST_TO_LENDIAN_INT32(block & 0xffffffff);
physical_block_high = B_HOST_TO_LENDIAN_INT16((block >> 32) & 0xffff); }
} _PACKED;
struct ext2_extent_entry {
uint32 logical_block;
uint16 length;
uint16 physical_block_high;
uint32 physical_block;
uint32 LogicalBlock() const
{ return B_LENDIAN_TO_HOST_INT32(logical_block); }
uint16 Length() const { return B_LENDIAN_TO_HOST_INT16(length) == 0x8000
? 0x8000 : B_LENDIAN_TO_HOST_INT16(length) & 0x7fff; }
uint64 PhysicalBlock() const { return B_LENDIAN_TO_HOST_INT32(physical_block)
| ((uint64)B_LENDIAN_TO_HOST_INT16(physical_block_high) << 32); }
void SetLogicalBlock(uint32 block) {
logical_block = B_HOST_TO_LENDIAN_INT32(block); }
void SetLength(uint16 _length) {
length = B_HOST_TO_LENDIAN_INT16(_length) & 0x7fff; }
void SetPhysicalBlock(uint64 block) {
physical_block = B_HOST_TO_LENDIAN_INT32(block & 0xffffffff);
physical_block_high = B_HOST_TO_LENDIAN_INT16((block >> 32) & 0xffff); }
} _PACKED;
struct ext2_extent_stream {
ext2_extent_header extent_header;
union {
ext2_extent_entry extent_entries[4];
ext2_extent_index extent_index[4];
};
} _PACKED;
#define EXT2_INODE_NORMAL_SIZE 128
#define EXT2_INODE_MAX_LINKS 65000
struct ext2_inode {
uint16 mode;
uint16 uid;
uint32 size;
uint32 access_time;
uint32 change_time;
uint32 modification_time;
uint32 deletion_time;
uint16 gid;
uint16 num_links;
uint32 num_blocks;
uint32 flags;
uint32 version;
union {
ext2_data_stream stream;
char symlink[EXT2_SHORT_SYMLINK_LENGTH];
ext2_extent_stream extent_stream;
};
uint32 generation;
uint32 file_access_control;
union {
uint32 directory_access_control;
uint32 size_high;
};
uint32 fragment;
union {
struct {
uint8 fragment_number;
uint8 fragment_size;
};
uint16 num_blocks_high;
};
uint16 file_access_control_high;
uint16 uid_high;
uint16 gid_high;
uint16 checksum;
uint16 reserved;
uint16 extra_inode_size;
uint16 checksum_high;
uint32 change_time_extra;
uint32 modification_time_extra;
uint32 access_time_extra;
uint32 creation_time;
uint32 creation_time_extra;
uint32 version_high;
uint32 project_id;
uint16 Mode() const { return B_LENDIAN_TO_HOST_INT16(mode); }
uint32 Flags() const { return B_LENDIAN_TO_HOST_INT32(flags); }
uint16 NumLinks() const { return B_LENDIAN_TO_HOST_INT16(num_links); }
uint32 NumBlocks() const { return B_LENDIAN_TO_HOST_INT32(num_blocks); }
uint64 NumBlocks64() const { return B_LENDIAN_TO_HOST_INT32(num_blocks)
| ((uint64)B_LENDIAN_TO_HOST_INT16(num_blocks_high) << 32); }
static void _DecodeTime(struct timespec *timespec, uint32 time,
uint32 time_extra, bool extra)
{
timespec->tv_sec = B_LENDIAN_TO_HOST_INT32(time);
if (extra && sizeof(timespec->tv_sec) > 4)
timespec->tv_sec |=
(uint64)(B_LENDIAN_TO_HOST_INT32(time_extra) & 0x2) << 32;
if (extra)
timespec->tv_nsec = B_LENDIAN_TO_HOST_INT32(time_extra) >> 2;
else
timespec->tv_nsec = 0;
}
void GetModificationTime(struct timespec *timespec, bool extra) const
{ _DecodeTime(timespec, modification_time, modification_time_extra,
extra); }
void GetAccessTime(struct timespec *timespec, bool extra) const
{ _DecodeTime(timespec, access_time, access_time_extra, extra); }
void GetChangeTime(struct timespec *timespec, bool extra) const
{ _DecodeTime(timespec, change_time, change_time_extra, extra); }
void GetCreationTime(struct timespec *timespec, bool extra) const
{
if (extra)
_DecodeTime(timespec, creation_time, creation_time_extra, extra);
else {
timespec->tv_sec = 0;
timespec->tv_nsec = 0;
}
}
time_t DeletionTime() const
{ return B_LENDIAN_TO_HOST_INT32(deletion_time); }
static uint32 _EncodeTime(const struct timespec *timespec)
{
uint32 time = (timespec->tv_nsec << 2) & 0xfffffffc;
if (sizeof(timespec->tv_sec) > 4)
time |= (uint64)timespec->tv_sec >> 32;
return B_HOST_TO_LENDIAN_INT32(time);
}
void SetModificationTime(const struct timespec *timespec, bool extra)
{
modification_time = B_HOST_TO_LENDIAN_INT32((uint32)timespec->tv_sec);
if (extra)
modification_time_extra = _EncodeTime(timespec);
}
void SetAccessTime(const struct timespec *timespec, bool extra)
{
access_time = B_HOST_TO_LENDIAN_INT32((uint32)timespec->tv_sec);
if (extra)
access_time_extra = _EncodeTime(timespec);
}
void SetChangeTime(const struct timespec *timespec, bool extra)
{
change_time = B_HOST_TO_LENDIAN_INT32((uint32)timespec->tv_sec);
if (extra)
change_time_extra = _EncodeTime(timespec);
}
void SetCreationTime(const struct timespec *timespec, bool extra)
{
if (extra) {
creation_time = B_HOST_TO_LENDIAN_INT32((uint32)timespec->tv_sec);
creation_time_extra =
B_HOST_TO_LENDIAN_INT32((uint32)timespec->tv_nsec);
}
}
void SetDeletionTime(time_t deletionTime)
{
deletion_time = B_HOST_TO_LENDIAN_INT32((uint32)deletionTime);
}
ino_t NextOrphan() const { return (ino_t)DeletionTime(); }
off_t Size() const
{
if (S_ISREG(Mode())) {
return B_LENDIAN_TO_HOST_INT32(size)
| ((off_t)B_LENDIAN_TO_HOST_INT32(size_high) << 32);
}
return B_LENDIAN_TO_HOST_INT32(size);
}
uint32 ExtendedAttributesBlock() const
{ return B_LENDIAN_TO_HOST_INT32(file_access_control);}
uint16 ExtraInodeSize() const
{ return B_LENDIAN_TO_HOST_INT16(extra_inode_size); }
uint32 UserID() const
{
return B_LENDIAN_TO_HOST_INT16(uid)
| (B_LENDIAN_TO_HOST_INT16(uid_high) << 16);
}
uint32 GroupID() const
{
return B_LENDIAN_TO_HOST_INT16(gid)
| (B_LENDIAN_TO_HOST_INT16(gid_high) << 16);
}
void SetMode(uint16 newMode)
{
mode = B_LENDIAN_TO_HOST_INT16(newMode);
}
void UpdateMode(uint16 newMode, uint16 mask)
{
SetMode((Mode() & ~mask) | (newMode & mask));
}
void ClearFlag(uint32 mask)
{
flags &= ~B_HOST_TO_LENDIAN_INT32(mask);
}
void SetFlag(uint32 mask)
{
flags |= B_HOST_TO_LENDIAN_INT32(mask);
}
void SetFlags(uint32 newFlags)
{
flags = B_HOST_TO_LENDIAN_INT32(newFlags);
}
void SetNumLinks(uint16 numLinks)
{
num_links = B_HOST_TO_LENDIAN_INT16(numLinks);
}
void SetNumBlocks(uint32 numBlocks)
{
num_blocks = B_HOST_TO_LENDIAN_INT32(numBlocks);
}
void SetNumBlocks64(uint64 numBlocks)
{
num_blocks = B_HOST_TO_LENDIAN_INT32(numBlocks & 0xffffffff);
num_blocks_high = B_HOST_TO_LENDIAN_INT16(numBlocks >> 32);
}
void SetNextOrphan(ino_t id)
{
deletion_time = B_HOST_TO_LENDIAN_INT32((uint32)id);
}
void SetSize(off_t newSize)
{
size = B_HOST_TO_LENDIAN_INT32(newSize & 0xFFFFFFFF);
if (S_ISREG(Mode()))
size_high = B_HOST_TO_LENDIAN_INT32(newSize >> 32);
}
void SetUserID(uint32 newUID)
{
uid = B_HOST_TO_LENDIAN_INT16(newUID & 0xFFFF);
uid_high = B_HOST_TO_LENDIAN_INT16(newUID >> 16);
}
void SetGroupID(uint32 newGID)
{
gid = B_HOST_TO_LENDIAN_INT16(newGID & 0xFFFF);
gid_high = B_HOST_TO_LENDIAN_INT16(newGID >> 16);
}
void SetExtendedAttributesBlock(uint32 block)
{
file_access_control = B_HOST_TO_LENDIAN_INT32(block);
}
void SetExtraInodeSize(uint16 newSize)
{
extra_inode_size = B_HOST_TO_LENDIAN_INT16(newSize);
}
} _PACKED;
#define EXT2_SUPER_BLOCK_MAGIC 0xef53
#define EXT2_INODE_SECURE_DELETION 0x00000001
#define EXT2_INODE_UNDELETE 0x00000002
#define EXT2_INODE_COMPRESSED 0x00000004
#define EXT2_INODE_SYNCHRONOUS 0x00000008
#define EXT2_INODE_IMMUTABLE 0x00000010
#define EXT2_INODE_APPEND_ONLY 0x00000020
#define EXT2_INODE_NO_DUMP 0x00000040
#define EXT2_INODE_NO_ACCESS_TIME 0x00000080
#define EXT2_INODE_DIRTY 0x00000100
#define EXT2_INODE_COMPRESSED_BLOCKS 0x00000200
#define EXT2_INODE_DO_NOT_COMPRESS 0x00000400
#define EXT2_INODE_COMPRESSION_ERROR 0x00000800
#define EXT2_INODE_BTREE 0x00001000
#define EXT2_INODE_INDEXED 0x00001000
#define EXT2_INODE_JOURNAL_DATA 0x00004000
#define EXT2_INODE_NO_MERGE_TAIL 0x00008000
#define EXT2_INODE_DIR_SYNCH 0x00010000
#define EXT2_INODE_HUGE_FILE 0x00040000
#define EXT2_INODE_EXTENTS 0x00080000
#define EXT2_INODE_LARGE_EA 0x00200000
#define EXT2_INODE_EOF_BLOCKS 0x00400000
#define EXT2_INODE_INLINE_DATA 0x10000000
#define EXT2_INODE_RESERVED 0x80000000
#define EXT2_INODE_INHERITED (EXT2_INODE_SECURE_DELETION | EXT2_INODE_UNDELETE \
| EXT2_INODE_COMPRESSED | EXT2_INODE_SYNCHRONOUS | EXT2_INODE_IMMUTABLE \
| EXT2_INODE_APPEND_ONLY | EXT2_INODE_NO_DUMP | EXT2_INODE_NO_ACCESS_TIME \
| EXT2_INODE_DO_NOT_COMPRESS | EXT2_INODE_JOURNAL_DATA \
| EXT2_INODE_NO_MERGE_TAIL | EXT2_INODE_DIR_SYNCH)
#define EXT2_NAME_LENGTH 255
#define EXT2_DIR_PAD 4
#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
#define EXT2_DIR_REC_LEN(namelen) (((namelen) + 8 + EXT2_DIR_ROUND) \
& ~EXT2_DIR_ROUND)
struct ext2_dir_entry {
uint32 inode_id;
uint16 length;
uint8 name_length;
uint8 file_type;
char name[EXT2_NAME_LENGTH];
uint32 InodeID() const { return B_LENDIAN_TO_HOST_INT32(inode_id); }
uint16 Length() const { return B_LENDIAN_TO_HOST_INT16(length); }
uint8 NameLength() const { return name_length; }
uint8 FileType() const { return file_type; }
void SetInodeID(uint32 id) { inode_id = B_HOST_TO_LENDIAN_INT32(id); }
void SetLength(uint16 newLength)
{
length = B_HOST_TO_LENDIAN_INT16(newLength);
if (nameLength % 4 == 0) {
length = B_HOST_TO_LENDIAN_INT16(
(short)(nameLength + MinimumSize()));
} else {
length = B_HOST_TO_LENDIAN_INT16(
(short)(nameLength % 4 + 1 + MinimumSize()));
}*/
}
bool IsValid() const
{
return Length() > MinimumSize();
}
static size_t MinimumSize()
{
return sizeof(ext2_dir_entry) - EXT2_NAME_LENGTH;
}
} _PACKED;
struct ext2_dir_entry_tail {
uint32 zero1;
uint16 twelve;
uint8 zero2;
uint8 hexade;
uint32 checksum;
} _PACKED;
struct ext2_htree_tail {
uint32 reserved;
uint32 checksum;
} _PACKED;
#define EXT2_TYPE_UNKNOWN 0
#define EXT2_TYPE_FILE 1
#define EXT2_TYPE_DIRECTORY 2
#define EXT2_TYPE_CHAR_DEVICE 3
#define EXT2_TYPE_BLOCK_DEVICE 4
#define EXT2_TYPE_FIFO 5
#define EXT2_TYPE_SOCKET 6
#define EXT2_TYPE_SYMLINK 7
#define EXT2_XATTR_MAGIC 0xea020000
#define EXT2_XATTR_ROUND ((1 << 2) - 1)
#define EXT2_XATTR_NAME_LENGTH 255
#define EXT2_XATTR_INDEX_USER 1
struct ext2_xattr_header {
uint32 magic;
uint32 refcount;
uint32 blocks;
uint32 hash;
uint32 checksum;
uint32 reserved[3];
bool IsValid() const
{
return B_LENDIAN_TO_HOST_INT32(magic) == EXT2_XATTR_MAGIC
&& B_LENDIAN_TO_HOST_INT32(blocks) == 1
&& refcount <= 1024;
}
void Dump() const {
for (unsigned int i = 0; i < Length(); i++)
dprintf("%02x ", ((uint8 *)this)[i]);
dprintf("\n");
}
static size_t Length()
{
return sizeof(ext2_xattr_header);
}
};
struct ext2_xattr_entry {
uint8 name_length;
uint8 name_index;
uint16 value_offset;
uint32 value_block;
uint32 value_size;
uint32 hash;
char name[EXT2_XATTR_NAME_LENGTH];
uint8 NameLength() const { return name_length; }
uint8 NameIndex() const { return name_index; }
uint16 ValueOffset() const { return
B_LENDIAN_TO_HOST_INT16(value_offset); }
uint32 ValueSize() const { return
B_LENDIAN_TO_HOST_INT32(value_size); }
uint32 Length() const { return (MinimumSize() + NameLength()
+ EXT2_XATTR_ROUND) & ~EXT2_XATTR_ROUND; }
bool IsValid() const
{
return NameLength() > 0 && value_block == 0;
}
void Dump(bool full=false) const {
for (unsigned int i = 0; i < (full ? sizeof(*this) : MinimumSize()); i++)
dprintf("%02x ", ((uint8 *)this)[i]);
dprintf("\n");
}
static size_t MinimumSize()
{
return sizeof(ext2_xattr_entry) - EXT2_XATTR_NAME_LENGTH;
}
} _PACKED;
struct file_cookie {
bigtime_t last_notification;
off_t last_size;
int open_mode;
};
#define EXT2_OPEN_MODE_USER_MASK 0x7fffffff
#define INODE_NOTIFICATION_INTERVAL 10000000LL
extern fs_volume_ops gExt2VolumeOps;
extern fs_vnode_ops gExt2VnodeOps;
#endif
