WebSVN – Kolibri OS – Blame – /kernel/trunk/fs/ext.inc

Rev	Author	Line No.	Line
6462	pathoswith	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; Copyright (C) KolibriOS team 2013-2016. All rights reserved. ;;
		4	;; Distributed under terms of the GNU General Public License. ;;
		5	;; ;;
		6	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		7
		8	$Revision: 6880 $
		9
		10	; EXT external functions
		11	; in:
		12	; ebx -> parameter structure of sysfunc 70
		13	; ebp -> EXTFS structure
6471	pathoswith	14	; esi -> path string in UTF-8
6462	pathoswith	15	; out:
		16	; eax, ebx = return values for sysfunc 70
		17	iglobal
		18	align 4
		19	ext_user_functions:
		20	dd ext_free
		21	dd (ext_user_functions_end - ext_user_functions - 4) / 4
		22	dd ext_ReadFile
		23	dd ext_ReadFolder
		24	dd ext_CreateFile
		25	dd ext_WriteFile
		26	dd ext_SetFileEnd
		27	dd ext_GetFileInfo
		28	dd ext_SetFileInfo
		29	dd 0
		30	dd ext_Delete
		31	dd ext_CreateFolder
		32	ext_user_functions_end:
		33	endg
		34
		35	struct DIRENTRY
		36	inodeNumber dd ?
		37	entryLength dw ?
		38	nameLength db ?
		39	fileType db ?
		40	name db ? ; rb [nameLength]
		41	ends
		42
		43	struct INODE
		44	accessMode dw ?
		45	UID dw ?
		46	fileSize dd ?
		47	accessedTime dd ?
		48	inodeModified dd ?
		49	dataModified dd ?
		50	deletedTime dd ?
		51	GID dw ?
		52	linksCount dw ?
		53	sectorsUsed dd ?
		54	featureFlags dd ?
		55	reserved dd ?
		56	blockNumbers rd 12
		57	addressBlock dd ?
		58	doubleAddress dd ?
		59	tripleAddress dd ?
		60	generation dd ?
		61	ACL dd ?
		62	fileSizeHigh dd ?
		63	ends
		64
		65	struct BGDESCR ; block group descriptor
		66	blockBitmap dd ?
		67	inodeBitmap dd ?
		68	inodeTable dd ?
		69	blocksFree dw ?
		70	inodesFree dw ?
		71	directoriesCount dw ?
		72	reserved rb 14
		73	ends
		74
		75	struct SUPERBLOCK
		76	inodesTotal dd ?
		77	blocksTotal dd ?
		78	blocksReserved dd ?
		79	blocksFree dd ?
		80	inodesFree dd ?
		81	firstGroupBlock dd ?
		82	sectorsPerBlockLog dd ? ; shift for 1024
		83	fragmentSizeLog dd ?
		84	blocksPerGroup dd ?
		85	fragmentsPerGroup dd ?
		86	inodesPerGroup dd ?
		87	lastMountTime dd ?
		88	lastWriteTime dd ?
		89	mountCount dw ?
		90	mountMax dw ?
		91	magic dw ?
		92	state dw ?
		93	errorHandling dw ?
		94	additionalVersion dw ?
		95	lastCheck dd ?
		96	checkInterval dd ?
		97	creatorOS dd ?
		98	dynamicVersionFlag dd ?
		99	reservedUID dw ?
		100	reservedGID dw ?
		101	firstInode dd ?
		102	inodeSize dw ?
		103	thisBlockGroup dw ?
		104	compatibleFlags dd ?
		105	incompatibleFlags dd ?
		106	RO_compatibleFlags dd ?
6871	pathoswith	107	UUID rb 16
		108	volumeLabel rb 16
6462	pathoswith	109	ends
		110
		111	; ext4 extent tree
		112	struct NODEHEADER ; tree node header
		113	magic dw ? ; 0xF30A
		114	entriesFolow dw ?
		115	entriesMax dw ?
		116	currentDepth dw ?
		117	generation dd ?
		118	ends
		119
		120	struct INDEX ; root/branch
		121	fileBlock dd ?
		122	nodeBlock dd ?
		123	nodeBlockHigh dw ?
		124	reserved dw ?
		125	ends
		126
		127	struct EXTENT ; leaf
		128	fileBlock dd ?
		129	blocksCount dw ?
		130	fsBlockHigh dw ?
		131	fsBlock dd ?
		132	ends
		133
		134	ROOT_INODE = 2
		135	EXTENTS_USED = 80000h
		136	TYPE_MASK = 0F000h
		137	FLAG_FILE = 8000h
		138	DIRECTORY = 4000h
		139	DIR_FLAG_FILE = 1
		140	DIR_DIRECTORY = 2
		141	KOS_HIDDEN = 2
		142	KOS_DIRECTORY = 10h
		143	READ_ONLY = 1
		144
		145	; Implemented "incompatible" features:
		146	; 2 = have file type in directory entry
		147	; 40h = extents
		148	; 200h = flexible block groups
		149	INCOMPATIBLE_SUPPORT = 242h
		150	; Read only support for "incompatible" features:
		151	INCOMPATIBLE_READ_SUPPORT = 240h
		152
		153	; Implemented "read-only" features:
		154	; 1 = sparse superblock
		155	; 2 = 64-bit file size
		156	READ_ONLY_SUPPORT = 3
		157
		158	struct EXTFS PARTITION
		159	Lock MUTEX
		160	mountType dd ?
		161	bytesPerBlock dd ?
		162	sectorsPerBlock dd ?
		163	dwordsPerBlock dd ?
		164	dwordsPerBranch dd ? ; dwordsPerBlock ^ 2
		165	mainBlockBuffer dd ?
		166	tempBlockBuffer dd ?
6848	pathoswith	167	descriptorTable dd ?
		168	descriptorTableEnd dd ?
6558	pathoswith	169	align0 rb 200h-EXTFS.align0
6462	pathoswith	170	superblock SUPERBLOCK
6558	pathoswith	171	align1 rb 400h-EXTFS.align1
6462	pathoswith	172	rootInodeBuffer INODE
6558	pathoswith	173	align2 rb 600h-EXTFS.align2
		174	inodeBuffer INODE
		175	align3 rb 800h-EXTFS.align3
6462	pathoswith	176	ends
		177
		178	; mount if it's a valid EXT partition
		179	ext2_create_partition:
		180	; in:
		181	; ebp -> PARTITION structure
		182	; ebx -> boot sector
		183	; ebx+512 -> buffer
		184	; out:
		185	; eax -> EXTFS structure, 0 = not EXT
		186	push ebx
		187	cmp dword [esi+DISK.MediaInfo.SectorSize], 512
		188	jnz .fail
		189	mov eax, 2
		190	add ebx, 512
		191	call fs_read32_sys
		192	test eax, eax
		193	jnz .fail
		194	cmp [ebx+SUPERBLOCK.magic], 0xEF53
		195	jne .fail
		196	cmp [ebx+SUPERBLOCK.state], 1
6471	pathoswith	197	ja .fail
6462	pathoswith	198	test [ebx+SUPERBLOCK.incompatibleFlags], not INCOMPATIBLE_SUPPORT
		199	jnz .fail
		200	cmp [ebx+SUPERBLOCK.sectorsPerBlockLog], 6 ; 64KB
		201	ja .fail
6852	pathoswith	202	cmp [ebx+SUPERBLOCK.inodeSize], 512
6462	pathoswith	203	ja .fail
		204	cmp [ebx+SUPERBLOCK.blocksPerGroup], 0
		205	je .fail
		206	cmp [ebx+SUPERBLOCK.inodesPerGroup], 0
		207	je .fail
6558	pathoswith	208	movi eax, sizeof.EXTFS
		209	call malloc
6462	pathoswith	210	test eax, eax
		211	jz .fail
		212	mov ecx, dword [ebp+PARTITION.FirstSector]
		213	mov dword [eax+EXTFS.FirstSector], ecx
		214	mov ecx, dword [ebp+PARTITION.FirstSector+4]
		215	mov dword [eax+EXTFS.FirstSector+4], ecx
		216	mov ecx, dword [ebp+PARTITION.Length]
		217	mov dword [eax+EXTFS.Length], ecx
		218	mov ecx, dword [ebp+PARTITION.Length+4]
		219	mov dword [eax+EXTFS.Length+4], ecx
		220	mov ecx, [ebp+PARTITION.Disk]
		221	mov [eax+EXTFS.Disk], ecx
		222	mov [eax+EXTFS.FSUserFunctions], ext_user_functions
		223
		224	push ebp esi edi
		225	mov ebp, eax
		226	lea ecx, [eax+EXTFS.Lock]
		227	call mutex_init
		228	mov esi, ebx
		229	lea edi, [ebp+EXTFS.superblock]
		230	mov ecx, 512/4
		231	rep movsd ; copy superblock
		232	mov ecx, [ebx+SUPERBLOCK.sectorsPerBlockLog]
		233	inc ecx
		234	mov eax, 1
		235	shl eax, cl
		236	mov [ebp+EXTFS.sectorsPerBlock], eax
		237	shl eax, 9
		238	mov [ebp+EXTFS.bytesPerBlock], eax
		239	shl eax, 1
		240	push eax
		241	shr eax, 3
		242	mov [ebp+EXTFS.dwordsPerBlock], eax
		243	mul eax
		244	mov [ebp+EXTFS.dwordsPerBranch], eax
		245	call kernel_alloc
		246	test eax, eax
		247	jz .error
		248	mov [ebp+EXTFS.mainBlockBuffer], eax
		249	add eax, [ebp+EXTFS.bytesPerBlock]
		250	mov [ebp+EXTFS.tempBlockBuffer], eax
		251	mov [ebp+EXTFS.mountType], 0
		252	test [ebx+SUPERBLOCK.RO_compatibleFlags], not READ_ONLY_SUPPORT
		253	jnz .read_only
		254	test [ebx+SUPERBLOCK.incompatibleFlags], INCOMPATIBLE_READ_SUPPORT
		255	jz @f
		256	.read_only:
		257	or [ebp+EXTFS.mountType], READ_ONLY
6848	pathoswith	258	@@:
		259	mov eax, [ebx+SUPERBLOCK.inodesTotal]
		260	dec eax
		261	xor edx, edx
		262	div [ebx+SUPERBLOCK.inodesPerGroup]
		263	inc eax
		264	shl eax, 5
		265	push eax eax
		266	call kernel_alloc
		267	pop ecx
		268	test eax, eax
		269	jz .error2
		270	mov [ebp+EXTFS.descriptorTable], eax
		271	mov ebx, eax
		272	add eax, ecx
		273	mov [ebp+EXTFS.descriptorTableEnd], eax
		274	mov eax, [ebp+EXTFS.superblock.firstGroupBlock]
		275	inc eax
		276	mul [ebp+EXTFS.sectorsPerBlock]
		277	dec ecx
		278	shr ecx, 9
		279	inc ecx
		280	call fs_read64_sys
		281	test eax, eax
		282	jnz @f
		283	mov al, ROOT_INODE
6462	pathoswith	284	lea ebx, [ebp+EXTFS.rootInodeBuffer]
		285	call readInode
		286	test eax, eax
		287	jnz @f
		288	mov eax, ebp
		289	pop edi esi ebp ebx
		290	ret
		291
		292	@@:
6848	pathoswith	293	stdcall kernel_free, [ebp+EXTFS.descriptorTable]
		294	.error2:
6462	pathoswith	295	stdcall kernel_free, [ebp+EXTFS.mainBlockBuffer]
		296	.error:
6558	pathoswith	297	mov eax, ebp
		298	call free
6462	pathoswith	299	pop edi esi ebp
		300	.fail:
		301	pop ebx
		302	xor eax, eax
		303	ret
		304
		305	; unmount EXT partition
		306	ext_free:
		307	; in: eax -> EXTFS structure
6848	pathoswith	308	push eax [eax+EXTFS.mainBlockBuffer]
		309	stdcall kernel_free, [eax+EXTFS.descriptorTable]
		310	call kernel_free
6558	pathoswith	311	pop eax
		312	jmp free
6462	pathoswith	313
		314	extfsWriteBlock:
		315	push fs_write64_sys
		316	jmp @f
6575	pathoswith	317	; in: eax = block number, ebx -> buffer
6462	pathoswith	318	extfsReadBlock:
		319	push fs_read64_sys
		320	@@:
		321	push ecx edx
		322	mov ecx, [ebp+EXTFS.sectorsPerBlock]
		323	mul ecx
		324	call dword[esp+8]
		325	pop edx ecx
		326	add esp, 4
		327	test eax, eax
		328	jz @f
		329	movi eax, ERROR_DEVICE
		330	stc
		331	@@:
		332	ret
		333
		334	extfsWriteDescriptor:
6848	pathoswith	335	; in: ebx = block group descriptor
		336	mov eax, [ebp+EXTFS.superblock.firstGroupBlock]
		337	inc eax
		338	mul [ebp+EXTFS.sectorsPerBlock]
		339	sub ebx, [ebp+EXTFS.descriptorTable]
		340	shr ebx, 9
		341	add eax, ebx
		342	shl ebx, 9
		343	add ebx, [ebp+EXTFS.descriptorTable]
6756	pathoswith	344	call fs_write32_sys
6462	pathoswith	345	ret
		346
6756	pathoswith	347	extfsExtentFree:
		348	; in: eax = first block number, ecx = extent size
		349	push ebx edx edi
6462	pathoswith	350	sub eax, [ebp+EXTFS.superblock.firstGroupBlock]
		351	xor edx, edx
6756	pathoswith	352	mov ebx, [ebp+EXTFS.superblock.blocksPerGroup]
		353	div ebx
		354	sub ebx, edx
		355	sub ebx, ecx
		356	jc .ret
6848	pathoswith	357	push edx
		358	mov ebx, [ebp+EXTFS.descriptorTable]
		359	shl eax, 5
		360	add ebx, eax
		361	mov eax, ecx
		362	mul [ebp+EXTFS.sectorsPerBlock]
6756	pathoswith	363	add [ebx+BGDESCR.blocksFree], cx
6848	pathoswith	364	add [ebp+EXTFS.superblock.blocksFree], ecx
		365	sub [ebp+EXTFS.inodeBuffer.sectorsUsed], eax
		366	push [ebx+BGDESCR.blockBitmap]
		367	call extfsWriteDescriptor
6575	pathoswith	368	pop eax
		369	mov ebx, [ebp+EXTFS.tempBlockBuffer]
6848	pathoswith	370	mov edx, eax
6462	pathoswith	371	call extfsReadBlock
		372	pop eax
6848	pathoswith	373	jc .ret
		374	push ebx edx
6756	pathoswith	375	mov edi, eax
		376	shr edi, 5
		377	shl edi, 2
		378	add edi, ebx
6774	pathoswith	379	mov edx, ecx
6756	pathoswith	380	and eax, 31
6774	pathoswith	381	jz .aligned
6756	pathoswith	382	mov ecx, 32
		383	sub ecx, eax
		384	sub edx, ecx
		385	jnc @f
		386	add ecx, edx
		387	xor edx, edx
		388	@@:
		389	or ebx, -1
		390	shl ebx, cl
		391	not ebx
		392	mov ecx, eax
		393	shl ebx, cl
		394	not ebx
		395	and [edi], ebx
6774	pathoswith	396	add edi, 4
		397	xor eax, eax
		398	.aligned:
6756	pathoswith	399	mov ecx, edx
		400	shr ecx, 5
		401	rep stosd
6462	pathoswith	402	and edx, 31
6774	pathoswith	403	jz @f
6756	pathoswith	404	mov ecx, edx
		405	not eax
		406	shl eax, cl
		407	and [edi], eax
		408	@@:
		409	pop eax ebx
6462	pathoswith	410	call extfsWriteBlock
6756	pathoswith	411	.ret:
		412	pop edi edx ebx
6643	pathoswith	413	xor eax, eax
6462	pathoswith	414	ret
		415
6643	pathoswith	416	extfsInodeAlloc:
		417	; in: eax = parent inode number
		418	; out: ebx = allocated inode number
6848	pathoswith	419	push ecx edx edi
6462	pathoswith	420	dec eax
		421	xor edx, edx
		422	div [ebp+EXTFS.superblock.inodesPerGroup]
6848	pathoswith	423	mov ebx, [ebp+EXTFS.descriptorTable]
		424	shl eax, 5
		425	add ebx, eax
		426	push ebx
6462	pathoswith	427	.test_block_group:
6848	pathoswith	428	push ebx
6774	pathoswith	429	cmp [ebx+BGDESCR.blocksFree], 0
		430	jz .next
6848	pathoswith	431	cmp [ebx+BGDESCR.inodesFree], 0
		432	jz .next
6756	pathoswith	433	dec [ebx+BGDESCR.inodesFree]
6848	pathoswith	434	dec [ebp+EXTFS.superblock.inodesFree]
		435	push [ebx+BGDESCR.inodeBitmap]
6575	pathoswith	436	call extfsWriteDescriptor
6848	pathoswith	437	pop eax
6575	pathoswith	438	mov ebx, [ebp+EXTFS.tempBlockBuffer]
6848	pathoswith	439	mov edx, eax
6462	pathoswith	440	mov edi, ebx
		441	call extfsReadBlock
		442	jc .fail
6643	pathoswith	443	mov ecx, [ebp+EXTFS.superblock.inodesPerGroup]
6462	pathoswith	444	or eax, -1
		445	shr ecx, 5
		446	repz scasd
		447	jz .next
		448	sub edi, 4
		449	mov eax, [edi]
		450	not eax
		451	bsf eax, eax
		452	bts [edi], eax
6575	pathoswith	453	sub edi, [ebp+EXTFS.tempBlockBuffer]
6462	pathoswith	454	shl edi, 3
		455	add eax, edi
		456	mov ecx, eax
		457	mov eax, edx
		458	call extfsWriteBlock
6575	pathoswith	459	pop eax
6848	pathoswith	460	sub eax, [ebp+EXTFS.descriptorTable]
		461	shr eax, 5
6643	pathoswith	462	mul [ebp+EXTFS.superblock.inodesPerGroup]
6756	pathoswith	463	lea ebx, [eax+ecx+1]
6575	pathoswith	464	xor eax, eax
6756	pathoswith	465	.ret:
6848	pathoswith	466	pop edi edi edx ecx
6462	pathoswith	467	ret
		468
6848	pathoswith	469	.next: ; search forward, then backward
		470	pop ebx
		471	cmp ebx, [esp]
		472	jc .backward
		473	add ebx, 32
		474	cmp ebx, [ebp+EXTFS.descriptorTableEnd]
		475	jc .test_block_group
		476	mov ebx, [esp]
6462	pathoswith	477	.backward:
6848	pathoswith	478	sub ebx, 32
		479	cmp ebx, [ebp+EXTFS.descriptorTable]
6756	pathoswith	480	jnc .test_block_group
		481	movi eax, ERROR_DISK_FULL
6848	pathoswith	482	push eax
6756	pathoswith	483	.fail:
		484	pop edi
		485	jmp .ret
6462	pathoswith	486
6643	pathoswith	487	extfsExtentAlloc:
6756	pathoswith	488	; in: eax = parent inode number, ecx = blocks max
		489	; out: ebx = first block number, ecx = blocks allocated
6643	pathoswith	490	push edx esi edi ecx
		491	dec eax
		492	xor edx, edx
		493	div [ebp+EXTFS.superblock.inodesPerGroup]
6848	pathoswith	494	mov ebx, [ebp+EXTFS.descriptorTable]
		495	shl eax, 5
		496	add ebx, eax
		497	push ebx
6643	pathoswith	498	.test_block_group:
6848	pathoswith	499	push ebx
		500	cmp [ebx+BGDESCR.blocksFree], 0
		501	jz .next
6756	pathoswith	502	mov eax, [ebx+BGDESCR.blockBitmap]
6643	pathoswith	503	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		504	mov edx, eax
		505	mov edi, ebx
		506	call extfsReadBlock
		507	jc .fail
		508	mov ecx, [ebp+EXTFS.superblock.blocksPerGroup]
		509	shr ecx, 5
		510	or eax, -1
		511	repz scasd
		512	jz .next
		513	mov esi, edi
		514	sub esi, 4
		515	push edx ecx
		516	mov eax, [esi]
		517	not eax
		518	bsf ecx, eax
		519	not eax
		520	shr eax, cl
		521	shl eax, cl
6774	pathoswith	522	mov ebx, 32
6756	pathoswith	523	bsf ebx, eax
6643	pathoswith	524	sub ebx, ecx
		525	mov eax, [esp+16]
		526	cmp ebx, eax
		527	jc @f
		528	mov ebx, eax
		529	@@:
6774	pathoswith	530	or eax, -1
		531	cmp ebx, 32
		532	jz @f
6643	pathoswith	533	xchg ebx, ecx
		534	shl eax, cl
		535	not eax
		536	xchg ebx, ecx
		537	shl eax, cl
6774	pathoswith	538	@@:
6643	pathoswith	539	or [esi], eax
		540	sub esi, [ebp+EXTFS.tempBlockBuffer]
		541	shl esi, 3
		542	add esi, ecx
		543	mov eax, [esp+16]
		544	sub eax, ebx
		545	mov [esp+16], ebx
		546	add ebx, ecx
		547	pop ecx
		548	test eax, eax
		549	jz .done
		550	cmp ebx, 32
		551	jnz .done
		552	jecxz .done
		553	mov ebx, eax
		554	shr eax, 5
		555	inc eax
		556	and ebx, 31
		557	cmp ecx, eax
		558	jnc @f
		559	mov eax, ecx
		560	mov bl, 32
		561	@@:
		562	mov ecx, eax
		563	shl eax, 5
		564	add [esp+12], eax
		565	xor eax, eax
		566	push edi
		567	repz scasd
		568	jz @f
		569	mov eax, [edi-4]
		570	bsf eax, eax
		571	xchg eax, ebx
		572	test ecx, ecx
		573	jnz @f
		574	cmp ebx, eax
		575	jc @f
		576	mov ebx, eax
		577	@@:
		578	inc ecx
		579	shl ecx, 5
		580	sub ecx, ebx
		581	sub [esp+16], ecx
		582	mov ecx, edi
		583	pop edi
		584	sub ecx, edi
		585	shr ecx, 2
		586	dec ecx
		587	or eax, -1
		588	rep stosd
		589	mov ecx, ebx
6859	pathoswith	590	jecxz .done
6774	pathoswith	591	neg ecx
		592	add ecx, 32
		593	shr eax, cl
6643	pathoswith	594	or [edi], eax
		595	.done:
		596	pop eax
		597	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		598	call extfsWriteBlock
6848	pathoswith	599	mov ebx, [esp]
6643	pathoswith	600	mov ecx, [esp+8]
6756	pathoswith	601	sub [ebx+BGDESCR.blocksFree], cx
6848	pathoswith	602	jnc @f
		603	mov [ebx+BGDESCR.blocksFree], 0
		604	@@:
6643	pathoswith	605	sub [ebp+EXTFS.superblock.blocksFree], ecx
		606	call extfsWriteDescriptor
		607	pop eax ebx
6848	pathoswith	608	sub eax, [ebp+EXTFS.descriptorTable]
		609	shr eax, 5
6643	pathoswith	610	mul [ebp+EXTFS.superblock.blocksPerGroup]
		611	mov ebx, eax
		612	add ebx, esi
6756	pathoswith	613	add ebx, [ebp+EXTFS.superblock.firstGroupBlock]
		614	pop ecx
		615	mov eax, ecx
		616	mul [ebp+EXTFS.sectorsPerBlock]
		617	add [ebp+EXTFS.inodeBuffer.sectorsUsed], eax
6643	pathoswith	618	xor eax, eax
		619	.ret:
		620	pop edi esi edx
		621	ret
		622
		623	.next: ; search forward, then backward
6848	pathoswith	624	pop ebx
		625	cmp ebx, [esp]
6643	pathoswith	626	jc .backward
6848	pathoswith	627	add ebx, 32
		628	cmp ebx, [ebp+EXTFS.descriptorTableEnd]
		629	jc .test_block_group
		630	mov ebx, [esp]
6643	pathoswith	631	.backward:
6848	pathoswith	632	sub ebx, 32
		633	cmp ebx, [ebp+EXTFS.descriptorTable]
		634	jnc .test_block_group
		635	movi eax, ERROR_DISK_FULL
6643	pathoswith	636	push eax
6756	pathoswith	637	.fail:
		638	add esp, 12
6643	pathoswith	639	xor ecx, ecx
6756	pathoswith	640	stc
6643	pathoswith	641	jmp .ret
		642
6726	pathoswith	643	extfsGetExtent:
		644	; in: ecx = starting file block
		645	; out: eax = first block number, ecx = extent size
		646	push ebx edx esi
		647	lea esi, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	648	test [esi+INODE.featureFlags], EXTENTS_USED
		649	jz .listTreeSearch
		650	add esi, INODE.blockNumbers
		651	.extentTreeSearch:
		652	cmp word [esi+NODEHEADER.magic], 0xF30A
		653	jne .fail
		654	movzx ebx, [esi+NODEHEADER.entriesFolow]
		655	add esi, sizeof.NODEHEADER
6726	pathoswith	656	test ebx, ebx
		657	jz .noBlock
6462	pathoswith	658	cmp word [esi-sizeof.NODEHEADER+NODEHEADER.currentDepth], 0
		659	je .leaf_block
6726	pathoswith	660	dec ebx
		661	jz .end_search_index
6462	pathoswith	662	@@:
		663	cmp ecx, [esi+sizeof.INDEX+INDEX.fileBlock]
		664	jb .end_search_index
		665	add esi, sizeof.INDEX
		666	dec ebx
6726	pathoswith	667	jnz @b
6462	pathoswith	668	.end_search_index:
		669	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		670	mov eax, [esi+INDEX.nodeBlock]
		671	call extfsReadBlock
6726	pathoswith	672	jc .fail2
6462	pathoswith	673	mov esi, ebx
		674	jmp .extentTreeSearch
		675
6726	pathoswith	676	.fail:
		677	movi eax, ERROR_FS_FAIL
		678	jmp .fail2
		679
6462	pathoswith	680	.leaf_block:
6726	pathoswith	681	movzx edx, [esi+EXTENT.blocksCount]
		682	add edx, [esi+EXTENT.fileBlock]
		683	sub edx, ecx
		684	ja .end_search_extent
6462	pathoswith	685	add esi, sizeof.EXTENT
		686	dec ebx
6726	pathoswith	687	jnz .leaf_block
		688	.noBlock:
		689	movi eax, ERROR_END_OF_FILE
		690	.fail2:
		691	pop esi edx ebx
		692	stc
		693	ret
6462	pathoswith	694
		695	.end_search_extent:
		696	sub ecx, [esi+EXTENT.fileBlock]
6726	pathoswith	697	jc .fail
6462	pathoswith	698	add ecx, [esi+EXTENT.fsBlock]
6726	pathoswith	699	mov eax, ecx
		700	mov ecx, edx
		701	pop esi edx ebx
6462	pathoswith	702	ret
		703
		704	.listTreeSearch:
		705	cmp ecx, 12
		706	jb .get_direct_block
		707	sub ecx, 12
		708	cmp ecx, [ebp+EXTFS.dwordsPerBlock]
		709	jb .get_indirect_block
		710	sub ecx, [ebp+EXTFS.dwordsPerBlock]
		711	cmp ecx, [ebp+EXTFS.dwordsPerBranch]
		712	jb .get_double_indirect_block
		713	; triply-indirect blocks
		714	sub ecx, [ebp+EXTFS.dwordsPerBranch]
		715	mov eax, [esi+INODE.tripleAddress]
6558	pathoswith	716	test eax, eax
		717	jz .noBlock
6462	pathoswith	718	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		719	call extfsReadBlock
		720	jc .fail2
		721	xor edx, edx
		722	mov eax, ecx
		723	div [ebp+EXTFS.dwordsPerBranch]
		724	; eax = number in triply-indirect block, edx = number in branch
		725	mov eax, [ebx+eax*4]
		726	test eax, eax
6558	pathoswith	727	jz .noBlock
6462	pathoswith	728	call extfsReadBlock
		729	jc .fail2
		730	mov eax, edx
		731	jmp @f
		732
6726	pathoswith	733	.get_direct_block:
		734	mov edx, ecx
		735	mov cl, 12
		736	lea ebx, [esi+INODE.blockNumbers]
		737	jmp .calculateExtent
6462	pathoswith	738
6726	pathoswith	739	.get_indirect_block:
		740	mov eax, [esi+INODE.addressBlock]
		741	test eax, eax
		742	jz .noBlock
		743	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		744	call extfsReadBlock
		745	jc .fail2
		746	mov edx, ecx
		747	mov ecx, [ebp+EXTFS.dwordsPerBlock]
		748	jmp .calculateExtent
		749
6462	pathoswith	750	.get_double_indirect_block:
		751	mov eax, [esi+INODE.doubleAddress]
		752	test eax, eax
6558	pathoswith	753	jz .noBlock
6462	pathoswith	754	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		755	call extfsReadBlock
		756	jc .fail2
		757	mov eax, ecx
		758	@@:
		759	xor edx, edx
6726	pathoswith	760	mov ecx, [ebp+EXTFS.dwordsPerBlock]
		761	div ecx
6462	pathoswith	762	; eax = number in doubly-indirect block, edx = number in indirect block
		763	mov eax, [ebx+eax*4]
		764	test eax, eax
6558	pathoswith	765	jz .noBlock
6462	pathoswith	766	call extfsReadBlock
		767	jc .fail2
6726	pathoswith	768	.calculateExtent:
		769	lea esi, [ebx+edx*4]
		770	lodsd
6756	pathoswith	771	test eax, eax
		772	jz .noBlock
6726	pathoswith	773	mov ebx, eax
		774	sub ecx, edx
		775	xor edx, edx
		776	@@:
		777	inc edx
		778	dec ecx
6462	pathoswith	779	jz @f
6726	pathoswith	780	lodsd
		781	sub eax, ebx
		782	sub eax, edx
6462	pathoswith	783	jz @b
		784	@@:
6726	pathoswith	785	mov eax, ebx
		786	mov ecx, edx
		787	pop esi edx ebx
		788	clc
6462	pathoswith	789	ret
		790
		791	getInodeLocation:
		792	; in: eax = inode number
6756	pathoswith	793	; out: eax = inode sector, edx = offset in sector
6462	pathoswith	794	dec eax
		795	xor edx, edx
		796	div [ebp+EXTFS.superblock.inodesPerGroup]
6848	pathoswith	797	shl eax, 5
		798	add eax, [ebp+EXTFS.descriptorTable]
		799	mov ebx, [eax+BGDESCR.inodeTable]
		800	imul ebx, [ebp+EXTFS.sectorsPerBlock]
6809	pathoswith	801	movzx eax, [ebp+EXTFS.superblock.inodeSize]
		802	mul edx
6462	pathoswith	803	mov edx, eax
		804	shr eax, 9
		805	and edx, 511
6756	pathoswith	806	add eax, ebx
6462	pathoswith	807	ret
		808
		809	writeInode:
6575	pathoswith	810	; in: eax = inode number, ebx -> inode data
6462	pathoswith	811	push edx edi esi ecx ebx eax
		812	mov edi, ebx
		813	call fsGetTime
		814	add eax, 978307200
		815	mov [edi+INODE.inodeModified], eax
		816	pop eax
6774	pathoswith	817	cmp eax, ROOT_INODE
		818	jnz @f
		819	movzx ecx, [ebp+EXTFS.superblock.inodeSize]
		820	mov esi, edi
6852	pathoswith	821	lea edi, [ebp+EXTFS.rootInodeBuffer]
6774	pathoswith	822	rep movsb
		823	@@:
6462	pathoswith	824	call getInodeLocation
		825	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		826	mov ecx, eax
		827	call fs_read32_sys
		828	test eax, eax
		829	jnz @f
		830	mov eax, ecx
		831	movzx ecx, [ebp+EXTFS.superblock.inodeSize]
		832	mov edi, edx
		833	add edi, ebx
6774	pathoswith	834	mov esi, [esp]
6462	pathoswith	835	rep movsb
		836	call fs_write32_sys
		837	.ret:
		838	pop ebx ecx esi edi edx
		839	ret
		840
		841	@@:
		842	movi eax, ERROR_DEVICE
		843	stc
		844	jmp .ret
		845
		846	readInode:
6575	pathoswith	847	; in: eax = inode number, ebx -> inode buffer
6462	pathoswith	848	push edx edi esi ecx ebx
		849	mov edi, ebx
		850	call getInodeLocation
		851	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		852	call fs_read32_sys
		853	test eax, eax
		854	jnz @b
		855	movzx ecx, [ebp+EXTFS.superblock.inodeSize]
		856	mov esi, edx
		857	add esi, ebx
		858	rep movsb
		859	xor eax, eax
		860	pop ebx ecx esi edi edx
		861	ret
		862
6643	pathoswith	863	indirectBlockAlloc:
		864	; in:
		865	; edi -> indirect block number
		866	; ebx = starting extent block
		867	; ecx = extent size
		868	; edx = starting file block
		869	mov eax, [edi]
		870	test eax, eax
		871	jz .newBlock
		872	push edi ebx ecx
		873	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		874	call extfsReadBlock
		875	jc .err2
		876	lea edi, [ebx+edx*4]
		877	test edx, edx
		878	jz @f
		879	cmp dword[edi-4], 0
		880	jnz @f
		881	pop ecx ebx edi
		882	.err:
		883	mov al, ERROR_FS_FAIL
		884	stc
		885	ret
		886
		887	.err2:
		888	pop ecx ebx edi
		889	ret
		890
		891	.newBlock:
		892	test edx, edx
		893	jnz .err
		894	mov [edi], ebx
		895	inc ebx
		896	dec ecx
		897	push edi ebx ecx
		898	mov ecx, [ebp+EXTFS.dwordsPerBlock]
		899	mov edi, [ebp+EXTFS.tempBlockBuffer]
		900	push edi
		901	rep stosd
		902	pop edi
		903	@@:
		904	mov ecx, [ebp+EXTFS.dwordsPerBlock]
		905	sub ecx, edx
		906	pop ebx eax
		907	sub ebx, ecx
		908	jnc @f
		909	add ecx, ebx
		910	xor ebx, ebx
		911	@@:
		912	jecxz .done
		913	add edx, ecx
		914	@@:
		915	stosd
		916	inc eax
		917	loop @b
		918	.done:
		919	pop edi
		920	push eax ebx
		921	mov eax, [edi]
		922	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		923	call extfsWriteBlock
		924	pop ecx ebx
		925	ret
		926
		927	doublyIndirectBlockAlloc:
		928	; in:
		929	; edi -> indirect block number
		930	; edx = starting file block
		931	; ebx = starting extent block
		932	; ecx = extent size
		933	; [esp+4] = rest of size
		934	; [esp+8] = parent inode number
		935	mov eax, [edi]
		936	test eax, eax
		937	jz .newBlock
		938	push edi ecx ebx
		939	mov ebx, [ebp+EXTFS.mainBlockBuffer]
		940	call extfsReadBlock
		941	jc .err2
		942	mov eax, edx
		943	xor edx, edx
		944	mov ecx, [ebp+EXTFS.dwordsPerBlock]
		945	div ecx
		946	lea edi, [ebx+eax*4]
		947	pop ebx
		948	test eax, eax
		949	jz @f
		950	cmp dword[edi-4], 0
		951	jnz @f
		952	pop ecx edi
		953	.err:
		954	mov al, ERROR_FS_FAIL
		955	stc
		956	ret
		957
		958	.err2:
		959	pop ebx ecx edi
		960	ret
		961
		962	.newBlock:
		963	test edx, edx
		964	jnz .err
		965	mov [edi], ebx
		966	inc ebx
		967	dec ecx
		968	inc dword[esp+4]
		969	push edi ecx
		970	mov ecx, [ebp+EXTFS.dwordsPerBlock]
		971	mov edi, [ebp+EXTFS.mainBlockBuffer]
		972	push ecx edi
		973	rep stosd
		974	pop edi ecx
		975	@@:
		976	sub ecx, eax
		977	xchg [esp], ecx
		978	.loop:
		979	cmp dword[edi], 0
		980	jnz @f
		981	inc dword[esp+12]
		982	@@:
		983	jecxz .extentAlloc
		984	call indirectBlockAlloc
		985	jc .end
		986	cmp edx, [ebp+EXTFS.dwordsPerBlock]
		987	jnz @b
		988	add edi, 4
		989	xor edx, edx
		990	dec dword[esp]
		991	jnz .loop
		992	.end:
		993	pop edi edi
		994	push ebx eax
		995	mov eax, [edi]
		996	mov ebx, [ebp+EXTFS.mainBlockBuffer]
		997	call extfsWriteBlock
		998	pop ebx
		999	add eax, ebx
		1000	xor ebx, ebx
		1001	cmp ebx, eax
		1002	pop ebx
		1003	ret
		1004
		1005	.extentAlloc:
		1006	mov ecx, [esp+12]
		1007	xor eax, eax
		1008	jecxz .end
		1009	mov eax, [esp+16]
		1010	call extfsExtentAlloc
		1011	jc .end
		1012	sub [esp+12], ecx
		1013	jmp @b
		1014
6462	pathoswith	1015	extfsExtendFile:
		1016	; in:
6558	pathoswith	1017	; [ebp+EXTFS.inodeBuffer] = inode
6849	pathoswith	1018	; ecx = inode number
		1019	; edx:eax = new size
		1020	push ebx esi edi ecx
6575	pathoswith	1021	lea esi, [ebp+EXTFS.inodeBuffer]
6849	pathoswith	1022	mov ebx, [esi+INODE.fileSize]
		1023	mov ecx, [esi+INODE.fileSizeHigh]
		1024	cmp ebx, eax
		1025	sbb ecx, edx
6643	pathoswith	1026	jnc .ret
6849	pathoswith	1027	mov ecx, [esi+INODE.fileSizeHigh]
6643	pathoswith	1028	mov [esi+INODE.fileSize], eax
6849	pathoswith	1029	mov [esi+INODE.fileSizeHigh], edx
		1030	sub eax, 1
		1031	sbb edx, 0
		1032	div [ebp+EXTFS.bytesPerBlock]
6643	pathoswith	1033	inc eax
6849	pathoswith	1034	xchg eax, ebx
		1035	mov edx, ecx
		1036	sub eax, 1
		1037	sbb edx, 0
6643	pathoswith	1038	jc @f
6849	pathoswith	1039	div [ebp+EXTFS.bytesPerBlock]
6643	pathoswith	1040	@@:
6849	pathoswith	1041	inc eax
		1042	sub ebx, eax
6643	pathoswith	1043	jz .ret
6849	pathoswith	1044	push ebx
		1045	mov edx, eax
6643	pathoswith	1046	@@:
		1047	mov ecx, [esp]
		1048	mov eax, [esp+4]
		1049	test ecx, ecx
		1050	jz .done
		1051	call extfsExtentAlloc
		1052	jc .errDone
		1053	sub [esp], ecx
		1054	cmp edx, 12
		1055	jc .directBlocks
		1056	sub edx, 12
		1057	cmp edx, [ebp+EXTFS.dwordsPerBlock]
		1058	jc .indirectBlocks
		1059	sub edx, [ebp+EXTFS.dwordsPerBlock]
		1060	cmp edx, [ebp+EXTFS.dwordsPerBranch]
		1061	jc .doublyIndirectBlock
		1062	sub edx, [ebp+EXTFS.dwordsPerBranch]
		1063	jmp .triplyIndirectBlock
		1064
		1065	.newExtent:
		1066	jmp @b
		1067
		1068	.directBlocks:
		1069	lea edi, [esi+INODE.blockNumbers+edx*4]
		1070	test edx, edx
		1071	jz @f
		1072	cmp dword[edi-4], 0
		1073	jz .errDone
6575	pathoswith	1074	@@:
		1075	mov eax, ebx
6643	pathoswith	1076	mov ebx, ecx
		1077	mov ecx, 12
		1078	sub ecx, edx
		1079	sub ebx, ecx
		1080	jnc @f
		1081	add ecx, ebx
		1082	xor ebx, ebx
		1083	@@:
		1084	add edx, ecx
		1085	@@:
		1086	stosd
		1087	inc eax
		1088	loop @b
		1089	mov ecx, ebx
		1090	mov ebx, eax
		1091	jecxz .newExtent
6462	pathoswith	1092	xor edx, edx
6643	pathoswith	1093	.indirectBlocks:
		1094	lea edi, [esi+INODE.addressBlock]
		1095	cmp dword[edi], 0
		1096	jnz @f
		1097	inc dword[esp]
		1098	@@:
		1099	call indirectBlockAlloc
		1100	jc .errDone
		1101	add edx, 12
		1102	jecxz .newExtent
		1103	xor edx, edx
		1104	.doublyIndirectBlock:
		1105	lea edi, [esi+INODE.doubleAddress]
		1106	call doublyIndirectBlockAlloc
		1107	jc .errDone
		1108	mov edx, [ebp+EXTFS.dwordsPerBranch]
		1109	add edx, [ebp+EXTFS.dwordsPerBlock]
		1110	add edx, 12
		1111	jecxz .newExtent
		1112	xor edx, edx
		1113	.triplyIndirectBlock:
		1114	push ecx ebx edx
		1115	stdcall kernel_alloc, [ebp+EXTFS.bytesPerBlock]
		1116	pop edx
		1117	mov esi, eax
		1118	mov eax, [ebp+EXTFS.inodeBuffer.tripleAddress]
		1119	test eax, eax
		1120	jz .newBlock
		1121	mov ebx, esi
		1122	call extfsReadBlock
		1123	pop ebx ecx
		1124	jc .errFree
		1125	mov eax, edx
		1126	xor edx, edx
		1127	div [ebp+EXTFS.dwordsPerBranch]
		1128	lea edi, [esi+eax*4]
		1129	test eax, eax
		1130	jz @f
		1131	cmp dword[edi-4], 0
		1132	jnz @f
		1133	mov al, ERROR_FS_FAIL
		1134	.errFree:
		1135	push ecx eax
		1136	stdcall kernel_free, esi
		1137	pop eax ecx
		1138	.errDone:
		1139	imul ecx, [ebp+EXTFS.sectorsPerBlock]
		1140	sub [ebp+EXTFS.inodeBuffer.sectorsUsed], ecx
		1141	pop ebx
		1142	imul ebx, [ebp+EXTFS.sectorsPerBlock]
6575	pathoswith	1143	add ebx, ecx
6643	pathoswith	1144	shl ebx, 9
		1145	sub [ebp+EXTFS.inodeBuffer.fileSize], ebx
		1146	stc
		1147	jmp .ret
		1148
		1149	.newBlock:
		1150	pop ebx ecx
		1151	mov al, ERROR_FS_FAIL
		1152	test edx, edx
		1153	jnz .errFree
		1154	mov [ebp+EXTFS.inodeBuffer.tripleAddress], ebx
		1155	inc ebx
		1156	dec ecx
		1157	inc dword[esp]
		1158	push ecx
		1159	mov ecx, [ebp+EXTFS.dwordsPerBlock]
		1160	mov edi, esi
		1161	xor eax, eax
		1162	rep stosd
		1163	mov edi, esi
		1164	pop ecx
		1165	@@:
		1166	jecxz .extentAlloc
		1167	call doublyIndirectBlockAlloc
		1168	jc .errSave
		1169	add edi, 4
		1170	jmp @b
		1171
		1172	.extentAlloc:
		1173	mov ecx, [esp]
		1174	mov eax, [esp+4]
		1175	jecxz @f
		1176	call extfsExtentAlloc
		1177	jc .errSave
		1178	sub [esp], ecx
		1179	jmp @b
		1180
		1181	@@:
		1182	mov eax, [ebp+EXTFS.inodeBuffer.tripleAddress]
		1183	mov ebx, esi
		1184	call extfsWriteBlock
		1185	stdcall kernel_free, esi
6558	pathoswith	1186	.done:
6462	pathoswith	1187	xor eax, eax
6643	pathoswith	1188	pop edi
6462	pathoswith	1189	.ret:
6849	pathoswith	1190	pop edi edi esi ebx
6462	pathoswith	1191	ret
		1192
6643	pathoswith	1193	.errSave:
		1194	push eax
		1195	mov eax, [ebp+EXTFS.inodeBuffer.tripleAddress]
		1196	mov ebx, esi
		1197	call extfsWriteBlock
		1198	pop eax
		1199	jmp .errFree
		1200
6856	pathoswith	1201	freeBlockList:
		1202	; in: edi -> list of blocks, edx = amount of blocks
		1203	; out: ebx=0 -> end of list
6756	pathoswith	1204	mov ebx, [edi]
		1205	test ebx, ebx
6856	pathoswith	1206	jz .ret
6756	pathoswith	1207	xor eax, eax
6643	pathoswith	1208	xor ecx, ecx
		1209	@@:
		1210	stosd
6756	pathoswith	1211	inc ecx
6643	pathoswith	1212	dec edx
6756	pathoswith	1213	jz @f
		1214	mov eax, [edi]
		1215	sub eax, ebx
		1216	sub eax, ecx
		1217	jz @b
		1218	@@:
		1219	mov eax, ebx
		1220	call extfsExtentFree
		1221	test edx, edx
6856	pathoswith	1222	jnz freeBlockList
		1223	.ret:
		1224	ret
		1225
		1226	freeIndirectBlock:
		1227	; in: edi -> indirect block number, edx = starting block
		1228	; out: edi = edi+4, eax=0 -> end
		1229	pushd ecx 0 edi edx
		1230	mov eax, [edi]
		1231	test eax, eax
		1232	jz .ret
		1233	mov ebx, [ebp+EXTFS.mainBlockBuffer]
		1234	call extfsReadBlock
		1235	jc .ret
		1236	lea edi, [ebx+edx*4]
		1237	neg edx
		1238	add edx, [ebp+EXTFS.dwordsPerBlock]
		1239	call freeBlockList
		1240	test ebx, ebx
		1241	jz @f
		1242	inc dword[esp+8]
		1243	@@:
6643	pathoswith	1244	pop edx edi
		1245	mov eax, [edi]
		1246	test edx, edx
		1247	jnz @f
6756	pathoswith	1248	xor ecx, ecx
		1249	inc ecx
		1250	call extfsExtentFree
6643	pathoswith	1251	stosd
		1252	jmp .done
		1253
		1254	@@:
6756	pathoswith	1255	mov ebx, [ebp+EXTFS.mainBlockBuffer]
6643	pathoswith	1256	call extfsWriteBlock
		1257	add edi, 4
		1258	.done:
		1259	pop eax ecx
		1260	xor edx, edx
		1261	ret
		1262
		1263	.ret:
		1264	pop edi edi edx ecx
		1265	ret
		1266
		1267	freeDoublyIndirectBlock:
		1268	; in: edi -> doubly-indirect block number, edx = starting block
		1269	; out: edi = edi+4, eax=-1 -> done, eax=0 -> end
		1270	mov eax, [edi]
		1271	test eax, eax
		1272	jz .ret
		1273	push ecx eax edx
		1274	stdcall kernel_alloc, [ebp+EXTFS.bytesPerBlock]
		1275	mov ebx, eax
		1276	pop edx eax
		1277	pushd 0 ebx edx
		1278	call extfsReadBlock
		1279	jc .err
		1280	mov eax, edx
		1281	xor edx, edx
		1282	mov ecx, [ebp+EXTFS.dwordsPerBlock]
		1283	div ecx
		1284	sub ecx, eax
		1285	push edi
		1286	lea edi, [ebx+eax*4]
		1287	@@:
		1288	call freeIndirectBlock
		1289	test eax, eax
		1290	jz .end
		1291	dec ecx
		1292	jnz @b
		1293	dec dword[esp+12]
		1294	.end:
		1295	pop edi edx
		1296	mov eax, [edi]
		1297	test edx, edx
		1298	jnz @f
		1299	xor ecx, ecx
6756	pathoswith	1300	inc ecx
		1301	call extfsExtentFree
6643	pathoswith	1302	stosd
		1303	jmp .done
		1304
		1305	@@:
		1306	mov ebx, [esp]
		1307	call extfsWriteBlock
		1308	add edi, 4
		1309	jmp .done
		1310
		1311	.err:
		1312	mov [esp+8], eax
		1313	pop eax
		1314	.done:
		1315	call kernel_free
		1316	pop eax ecx
		1317	.ret:
		1318	xor edx, edx
		1319	ret
		1320
6462	pathoswith	1321	extfsTruncateFile:
6849	pathoswith	1322	; in: edx:eax = new size, [ebp+EXTFS.inodeBuffer] = inode
6575	pathoswith	1323	lea esi, [ebp+EXTFS.inodeBuffer]
6849	pathoswith	1324	mov ecx, edx
		1325	cmp eax, [esi+INODE.fileSize]
		1326	sbb ecx, [esi+INODE.fileSizeHigh]
6462	pathoswith	1327	jnc .ret
6849	pathoswith	1328	mov [esi+INODE.fileSize], eax
		1329	mov [esi+INODE.fileSizeHigh], edx
		1330	sub eax, 1
		1331	sbb edx, 0
		1332	jc @f
		1333	div [ebp+EXTFS.bytesPerBlock]
		1334	@@:
		1335	inc eax
		1336	mov edx, eax
6643	pathoswith	1337	cmp edx, 12
		1338	jc .directBlocks
		1339	sub edx, 12
		1340	cmp edx, [ebp+EXTFS.dwordsPerBlock]
		1341	jc .indirectBlocks
		1342	sub edx, [ebp+EXTFS.dwordsPerBlock]
		1343	cmp edx, [ebp+EXTFS.dwordsPerBranch]
		1344	jc .doublyIndirectBlock
		1345	sub edx, [ebp+EXTFS.dwordsPerBranch]
		1346	jmp .triplyIndirectBlock
		1347
		1348	.directBlocks:
		1349	lea edi, [esi+INODE.blockNumbers+edx*4]
		1350	neg edx
		1351	add edx, 12
6856	pathoswith	1352	call freeBlockList
		1353	test ebx, ebx
6643	pathoswith	1354	jz .ret
		1355	.indirectBlocks:
		1356	lea edi, [esi+INODE.addressBlock]
		1357	call freeIndirectBlock
		1358	test eax, eax
		1359	jz .ret
		1360	.doublyIndirectBlock:
		1361	lea edi, [esi+INODE.doubleAddress]
		1362	call freeDoublyIndirectBlock
		1363	test eax, eax
		1364	jz .ret
		1365	.triplyIndirectBlock:
		1366	mov eax, [esi+INODE.tripleAddress]
		1367	test eax, eax
		1368	jz .ret
		1369	push eax edx
		1370	stdcall kernel_alloc, [ebp+EXTFS.bytesPerBlock]
6575	pathoswith	1371	mov ebx, eax
6643	pathoswith	1372	pop edx eax
		1373	push ebx eax edx
		1374	call extfsReadBlock
		1375	jc .err
		1376	mov eax, edx
6462	pathoswith	1377	xor edx, edx
6643	pathoswith	1378	div [ebp+EXTFS.dwordsPerBranch]
		1379	mov ecx, [ebp+EXTFS.dwordsPerBlock]
		1380	sub ecx, eax
		1381	lea edi, [ebx+eax*4]
		1382	@@:
		1383	call freeDoublyIndirectBlock
		1384	test eax, eax
		1385	jz .end
		1386	dec ecx
		1387	jnz @b
		1388	.end:
		1389	pop edx eax
6462	pathoswith	1390	test edx, edx
6575	pathoswith	1391	jnz @f
		1392	xor ecx, ecx
6756	pathoswith	1393	inc ecx
		1394	call extfsExtentFree
6643	pathoswith	1395	mov [esi+INODE.tripleAddress], eax
		1396	jmp .done
		1397
6575	pathoswith	1398	@@:
6643	pathoswith	1399	mov ebx, [esp]
		1400	call extfsWriteBlock
		1401	jmp .done
6462	pathoswith	1402
6643	pathoswith	1403	.err:
		1404	pop eax eax
6558	pathoswith	1405	.done:
6643	pathoswith	1406	call kernel_free
6462	pathoswith	1407	.ret:
		1408	ret
		1409
		1410	linkInode:
		1411	; in:
		1412	; eax = inode on which to link
		1413	; ebx = inode to link
6471	pathoswith	1414	; esi -> name in UTF-8
6462	pathoswith	1415	; dl = file type
		1416	push esi edi ebx ecx eax edx
		1417	call strlen
		1418	push esi ebx ecx
6558	pathoswith	1419	lea esi, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	1420	mov ebx, esi
		1421	call readInode
		1422	jc .error_inode_read
6643	pathoswith	1423	mov eax, [esi+INODE.fileSize]
6852	pathoswith	1424	xor edx, edx
		1425	div [ebp+EXTFS.bytesPerBlock]
6462	pathoswith	1426	xor ecx, ecx
6558	pathoswith	1427	.searchBlock:
		1428	push eax ; blocks total
6462	pathoswith	1429	push ecx ; current file block number
6558	pathoswith	1430	cmp eax, ecx
		1431	jz .alloc_block
6726	pathoswith	1432	call extfsGetExtent
6462	pathoswith	1433	jc .error_get_inode_block
6726	pathoswith	1434	push eax
6462	pathoswith	1435	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		1436	call extfsReadBlock
		1437	jc .error_block_read
6558	pathoswith	1438	mov ecx, [esp+12]
6856	pathoswith	1439	add ecx, 8 ; directory entry size
6462	pathoswith	1440	mov edi, [ebp+EXTFS.tempBlockBuffer]
		1441	mov edx, edi
		1442	add edx, [ebp+EXTFS.bytesPerBlock]
		1443	.searchSpace:
		1444	movzx eax, [edi+DIRENTRY.entryLength]
		1445	test eax, eax
		1446	jz .zeroLength
		1447	cmp [edi+DIRENTRY.inodeNumber], 0
		1448	je .unusedEntry
		1449	movzx ebx, [edi+DIRENTRY.nameLength]
		1450	add ebx, 8+3
		1451	and ebx, -4
		1452	sub eax, ebx
		1453	add edi, ebx
		1454	cmp eax, ecx
		1455	jb .nextEntry
		1456	sub edi, ebx
		1457	mov [edi+DIRENTRY.entryLength], bx
		1458	add edi, ebx
		1459	mov [edi+DIRENTRY.entryLength], ax
		1460	jmp .found
		1461
		1462	.unusedEntry:
		1463	cmp eax, ecx
		1464	jge .found
		1465	.nextEntry:
		1466	add edi, eax
		1467	cmp edi, edx
		1468	jb .searchSpace
6856	pathoswith	1469	pop ecx
		1470	@@:
		1471	pop ecx eax
6558	pathoswith	1472	inc ecx
		1473	jmp .searchBlock
6462	pathoswith	1474
		1475	.zeroLength:
		1476	mov eax, edx
		1477	sub eax, edi
6856	pathoswith	1478	mov [edi+DIRENTRY.entryLength], ax
6462	pathoswith	1479	cmp eax, ecx
		1480	jge .found
		1481	mov [edi+DIRENTRY.inodeNumber], 0
		1482	pop eax
		1483	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		1484	call extfsWriteBlock
6856	pathoswith	1485	jmp @b
		1486
6726	pathoswith	1487	.alloc_block:
6849	pathoswith	1488	mov eax, [esi+INODE.fileSize]
		1489	add eax, [ebp+EXTFS.bytesPerBlock]
		1490	xor edx, edx
		1491	mov ecx, [esp+24]
6726	pathoswith	1492	call extfsExtendFile
		1493	jc .error_get_inode_block
		1494	mov eax, [esp+24]
		1495	mov ebx, esi
		1496	call writeInode
		1497	jc .error_get_inode_block
		1498	mov ecx, [esp]
		1499	call extfsGetExtent
6462	pathoswith	1500	jc .error_get_inode_block
6726	pathoswith	1501	push eax
6575	pathoswith	1502	mov edi, [ebp+EXTFS.tempBlockBuffer]
6462	pathoswith	1503	mov eax, [ebp+EXTFS.bytesPerBlock]
		1504	mov [edi+DIRENTRY.entryLength], ax
		1505	.found:
		1506	pop edx ecx ecx ecx ebx esi
6575	pathoswith	1507	mov [edi+DIRENTRY.inodeNumber], ebx
		1508	mov word [edi+DIRENTRY.nameLength], cx
6856	pathoswith	1509	sub eax, 8
		1510	cmp ecx, eax
		1511	adc ecx, 0
		1512	test [ebp+EXTFS.superblock.incompatibleFlags], 2
		1513	jz @f
		1514	mov eax, [esp]
6462	pathoswith	1515	mov [edi+DIRENTRY.fileType], al
6856	pathoswith	1516	@@:
		1517	push ebx
6462	pathoswith	1518	add edi, 8
		1519	rep movsb
		1520	mov eax, edx
		1521	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		1522	call extfsWriteBlock
		1523	mov eax, [esp]
6558	pathoswith	1524	lea ebx, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	1525	call readInode
		1526	jc .error_block_write
		1527	pop eax
		1528	inc [ebx+INODE.linksCount]
		1529	call writeInode
		1530	jc @f
		1531	xor eax, eax
		1532	@@:
		1533	pop edx ecx ecx ebx edi esi
		1534	ret
		1535
		1536	.error_block_read:
		1537	pop ebx
		1538	.error_get_inode_block:
		1539	pop ebx ebx
		1540	.error_inode_read:
		1541	pop ebx ebx
		1542	.error_block_write:
		1543	pop ebx
		1544	jmp @b
		1545
		1546	unlinkInode:
6853	pathoswith	1547	; in: eax = directory inode number, esi = inode to unlink
		1548	push edi
6558	pathoswith	1549	lea ebx, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	1550	call readInode
6853	pathoswith	1551	jc .ret
		1552	xor ecx, ecx
6462	pathoswith	1553	.loop:
6853	pathoswith	1554	push ecx
6726	pathoswith	1555	call extfsGetExtent
6462	pathoswith	1556	jc .fail_loop
6726	pathoswith	1557	mov edi, eax
6462	pathoswith	1558	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		1559	call extfsReadBlock
		1560	jc .fail_loop
		1561	.first_dir_entry: ; edi -> block
6853	pathoswith	1562	cmp [ebx+DIRENTRY.inodeNumber], esi
6462	pathoswith	1563	jne @f
		1564	mov [ebx+DIRENTRY.inodeNumber], 0
		1565	mov word [ebx+DIRENTRY.nameLength], 0 ; fileType = 0
		1566	jmp .write_block
		1567
6853	pathoswith	1568	.fail:
		1569	pop edi
		1570	movi eax, ERROR_FS_FAIL
		1571	stc
		1572	.fail_loop:
		1573	pop edi
		1574	jmp .ret
		1575
		1576	.next:
		1577	pop ecx ecx
		1578	inc ecx
		1579	jmp .loop
		1580
6462	pathoswith	1581	@@:
		1582	mov edx, ebx
		1583	add edx, [ebp+EXTFS.bytesPerBlock]
		1584	push edx
6853	pathoswith	1585	@@:
		1586	movzx ecx, [ebx+DIRENTRY.entryLength]
		1587	jecxz .fail
6462	pathoswith	1588	mov edx, ebx
		1589	add ebx, ecx
6853	pathoswith	1590	cmp ebx, [esp]
		1591	jnc .next
		1592	cmp [ebx+DIRENTRY.inodeNumber], esi
		1593	jnz @b
6462	pathoswith	1594	mov cx, [ebx+DIRENTRY.entryLength]
		1595	add [edx+DIRENTRY.entryLength], cx
		1596	pop eax
		1597	.write_block:
		1598	pop eax
		1599	mov eax, edi
		1600	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		1601	call extfsWriteBlock
6853	pathoswith	1602	.ret:
		1603	pop edi
6462	pathoswith	1604	ret
		1605
6522	pathoswith	1606	findInode:
6471	pathoswith	1607	; in: esi -> path string in UTF-8
6462	pathoswith	1608	; out:
6471	pathoswith	1609	; edi -> file name in UTF-8
6522	pathoswith	1610	; esi = last inode number
6558	pathoswith	1611	; [ebp+EXTFS.inodeBuffer] = last inode
6522	pathoswith	1612	; ecx = parent inode number
		1613	; CF=1 -> file not found, edi=0 -> error
6462	pathoswith	1614	push esi
		1615	lea esi, [ebp+EXTFS.rootInodeBuffer]
6558	pathoswith	1616	lea edi, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	1617	movzx ecx, [ebp+EXTFS.superblock.inodeSize]
6522	pathoswith	1618	mov edx, esi
6462	pathoswith	1619	rep movsb
6522	pathoswith	1620	pop esi
6849	pathoswith	1621	pushd ebx 0 ROOT_INODE
6558	pathoswith	1622	mov edi, esi
6756	pathoswith	1623	cmp [edx+INODE.fileSize], 0
6522	pathoswith	1624	jz .not_found
		1625	cmp byte [esi], 0
		1626	jnz .next_path_part
6462	pathoswith	1627	xor eax, eax
6849	pathoswith	1628	pop esi ecx ebx
6468	pathoswith	1629	ret
6462	pathoswith	1630
6522	pathoswith	1631	@@:
		1632	pop esi esi
		1633	.error:
6849	pathoswith	1634	pop esi ecx ebx
6522	pathoswith	1635	xor edi, edi
		1636	stc
		1637	ret
		1638
6462	pathoswith	1639	.next_path_part:
6756	pathoswith	1640	push [edx+INODE.fileSize]
6462	pathoswith	1641	xor ecx, ecx
		1642	.folder_block_cycle:
		1643	push ecx
6726	pathoswith	1644	call extfsGetExtent
6522	pathoswith	1645	jc @b
6462	pathoswith	1646	mov ebx, [ebp+EXTFS.mainBlockBuffer]
		1647	call extfsReadBlock
6522	pathoswith	1648	jc @b
6462	pathoswith	1649	push esi edx
		1650	mov edx, ebx
		1651	add edx, [ebp+EXTFS.bytesPerBlock]
		1652	.start_rec:
		1653	cmp [ebx+DIRENTRY.inodeNumber], 0
		1654	jz .next_rec
		1655	push esi
		1656	movzx ecx, [ebx+DIRENTRY.nameLength]
6471	pathoswith	1657	lea edi, [ebx+DIRENTRY.name]
		1658	repz cmpsb
		1659	jz .test_find
6462	pathoswith	1660	@@: ; doesn't match
		1661	pop esi
		1662	.next_rec:
6856	pathoswith	1663	movzx ecx, [ebx+DIRENTRY.entryLength]
		1664	jecxz .stop
		1665	add ebx, ecx
6462	pathoswith	1666	cmp ebx, edx
		1667	jb .start_rec
6856	pathoswith	1668	jmp .stop
6462	pathoswith	1669
		1670	.test_find:
		1671	cmp byte [esi], 0
		1672	je @f
		1673	cmp byte [esi], '/'
		1674	jne @b
		1675	inc esi
		1676	@@:
6856	pathoswith	1677	pop edx
		1678	.stop:
		1679	pop edx edi ecx eax
6462	pathoswith	1680	; ebx -> matched directory entry, esi -> name without parent, or not changed
		1681	cmp edi, esi
6522	pathoswith	1682	jnz @f
6756	pathoswith	1683	sub eax, [ebp+EXTFS.bytesPerBlock]
6462	pathoswith	1684	jle .not_found
		1685	push eax
		1686	inc ecx
		1687	jmp .folder_block_cycle
		1688
6522	pathoswith	1689	@@:
6462	pathoswith	1690	pop eax
6522	pathoswith	1691	mov [esp], eax
6462	pathoswith	1692	mov eax, [ebx+DIRENTRY.inodeNumber]
6558	pathoswith	1693	lea ebx, [ebp+EXTFS.inodeBuffer]
6522	pathoswith	1694	push eax
6462	pathoswith	1695	call readInode
6522	pathoswith	1696	jc .error
		1697	cmp byte [esi], 0
		1698	je .ret
		1699	mov edx, ebx
		1700	movzx eax, [ebx+INODE.accessMode]
		1701	and eax, TYPE_MASK
		1702	cmp eax, DIRECTORY
		1703	jz .next_path_part
6558	pathoswith	1704	xor edi, edi ; path folder is a file
		1705	jmp @f
		1706
6462	pathoswith	1707	.not_found:
6558	pathoswith	1708	mov esi, edi
		1709	call strlen
		1710	mov al, '/'
		1711	repnz scasb
		1712	mov edi, esi
		1713	jnz @f
		1714	xor edi, edi ; path folder not found
		1715	@@:
6462	pathoswith	1716	movi eax, ERROR_FILE_NOT_FOUND
		1717	stc
6522	pathoswith	1718	.ret:
6849	pathoswith	1719	pop esi ecx ebx
6468	pathoswith	1720	ret
6462	pathoswith	1721
		1722	writeSuperblock:
		1723	push ebx
		1724	mov eax, 2
		1725	lea ebx, [ebp+EXTFS.superblock]
		1726	call fs_write32_sys
		1727	pop ebx
		1728	ret
		1729
		1730	extfsWritingInit:
		1731	movi eax, ERROR_UNSUPPORTED_FS
		1732	test [ebp+EXTFS.mountType], READ_ONLY
		1733	jnz @f
		1734	ext_lock:
		1735	lea ecx, [ebp+EXTFS.Lock]
		1736	jmp mutex_lock
		1737
		1738	@@:
		1739	pop ebx
		1740	xor ebx, ebx
		1741	ret
		1742
		1743	ext_unlock:
		1744	lea ecx, [ebp+EXTFS.Lock]
		1745	jmp mutex_unlock
		1746
		1747	;----------------------------------------------------------------
		1748	ext_ReadFolder:
		1749	call ext_lock
		1750	cmp byte [esi], 0
		1751	jz .root_folder
6468	pathoswith	1752	call findInode
6462	pathoswith	1753	jc .error_ret
6558	pathoswith	1754	lea esi, [ebp+EXTFS.inodeBuffer]
6522	pathoswith	1755	test [esi+INODE.accessMode], FLAG_FILE
		1756	jnz .error_not_found
6462	pathoswith	1757	jmp @f
		1758
		1759	.root_folder:
		1760	lea esi, [ebp+EXTFS.rootInodeBuffer]
6558	pathoswith	1761	lea edi, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	1762	movzx ecx, [ebp+EXTFS.superblock.inodeSize]
		1763	shr ecx, 2
		1764	push edi
		1765	rep movsd
		1766	pop esi
		1767	@@:
		1768	cmp [esi+INODE.fileSize], 0
		1769	je .error_empty_dir
		1770	mov edx, [ebx+16]
		1771	push edx ; [edi+28] result buffer
		1772	push 0 ; [edi+24] end of the current block in folder
		1773	pushd [ebx+12] ; [edi+20] files to read
		1774	pushd [ebx+4] ; [edi+16] first wanted file
		1775	pushd [ebx+8] ; [edi+12] flags
		1776	push 0 ; [edi+8] read files
		1777	push 0 ; [edi+4] files in folder
		1778	push 0 ; [edi] current block index
		1779	mov edi, esp ; edi -> local variables
		1780	add edx, 32
		1781	xor ecx, ecx
6726	pathoswith	1782	call extfsGetExtent
6462	pathoswith	1783	jc .error_get_block
		1784	mov ebx, [ebp+EXTFS.mainBlockBuffer]
		1785	call extfsReadBlock
		1786	jc .error_get_block
		1787	mov eax, ebx
		1788	add eax, [ebp+EXTFS.bytesPerBlock]
		1789	mov [edi+24], eax
		1790	mov ecx, [edi+16]
		1791	.find_wanted_start:
		1792	jecxz .find_wanted_end
		1793	.find_wanted_cycle:
		1794	cmp [ebx+DIRENTRY.inodeNumber], 0
		1795	jz @f
		1796	inc dword [edi+4]
		1797	dec ecx
		1798	@@:
		1799	movzx eax, [ebx+DIRENTRY.entryLength]
		1800	cmp eax, 12 ; minimum entry length
		1801	jb .error_bad_len
		1802	test eax, 3 ; length must be aligned
		1803	jnz .error_bad_len
		1804	sub [esi+INODE.fileSize], eax
		1805	add ebx, eax
		1806	cmp ebx, [edi+24]
		1807	jb .find_wanted_start
		1808	push .find_wanted_start
		1809	.end_block: ; read next block
		1810	cmp [esi+INODE.fileSize], 0
		1811	jle .end_dir
		1812	inc dword [edi]
		1813	push ecx
		1814	mov ecx, [edi]
6726	pathoswith	1815	call extfsGetExtent
6462	pathoswith	1816	jc .error_get_block
		1817	mov ebx, [ebp+EXTFS.mainBlockBuffer]
		1818	call extfsReadBlock
		1819	jc .error_get_block
		1820	pop ecx
		1821	mov eax, ebx
		1822	add eax, [ebp+EXTFS.bytesPerBlock]
		1823	mov [edi+24], eax
		1824	ret
		1825
		1826	.wanted_end:
		1827	loop .find_wanted_cycle
		1828	.find_wanted_end:
		1829	mov ecx, [edi+20]
		1830	.wanted_start:
		1831	jecxz .wanted_end
		1832	cmp [ebx+DIRENTRY.inodeNumber], 0
		1833	jz .empty_rec
		1834	inc dword [edi+8]
		1835	inc dword [edi+4]
6558	pathoswith	1836	push ebx edi ecx esi edx edi
6471	pathoswith	1837	pushd [edi+12]
6462	pathoswith	1838	mov edi, edx
		1839	xor eax, eax
		1840	mov ecx, 40 / 4
		1841	rep stosd
6558	pathoswith	1842	popd [edx+4] edi
6462	pathoswith	1843	mov eax, [ebx+DIRENTRY.inodeNumber]
6558	pathoswith	1844	mov ebx, [ebp+EXTFS.tempBlockBuffer]
6462	pathoswith	1845	call readInode
		1846	jc .error_read_subinode
		1847	mov esi, ebx
		1848	lea edi, [edx+8]
		1849	mov eax, [ebx+INODE.inodeModified]
		1850	sub eax, 978307200 ; 01.01.1970-01.01.2001 = (36531+8)246060
		1851	call fsTime2bdfe
		1852
		1853	mov eax, [esi+INODE.accessedTime]
		1854	sub eax, 978307200
		1855	call fsTime2bdfe
		1856
		1857	mov eax, [esi+INODE.dataModified]
		1858	sub eax, 978307200
		1859	call fsTime2bdfe
		1860	pop edx
		1861	or dword [edx], KOS_DIRECTORY
6522	pathoswith	1862	test [esi+INODE.accessMode], FLAG_FILE
		1863	jz @f
6462	pathoswith	1864	xor dword [edx], KOS_DIRECTORY ; mark as file
		1865	mov eax, [esi+INODE.fileSize]
		1866	stosd
		1867	mov eax, [esi+INODE.fileSizeHigh]
		1868	stosd
		1869	@@:
		1870	mov esi, [esp+12]
		1871	movzx ecx, [esi+DIRENTRY.nameLength]
6471	pathoswith	1872	lea esi, [esi+DIRENTRY.name]
		1873	cmp byte [esi], '.'
		1874	jnz @f
		1875	or byte [edx], KOS_HIDDEN
		1876	@@:
6462	pathoswith	1877	lea edi, [edx+40]
6798	pathoswith	1878	cmp byte [edx+4], 3
		1879	jz .utf8
		1880	add ecx, esi
		1881	cmp byte [edx+4], 2
6471	pathoswith	1882	jz .utf16
		1883	@@:
		1884	call utf8to16
		1885	call uni2ansi_char
		1886	stosb
		1887	cmp esi, ecx
		1888	jc @b
6462	pathoswith	1889	and byte [edi], 0
6471	pathoswith	1890	add edx, 40+264
		1891	@@:
6462	pathoswith	1892	pop esi ecx edi ebx
		1893	dec ecx
		1894	.empty_rec:
		1895	movzx eax, [ebx+DIRENTRY.entryLength]
		1896	cmp eax, 12
		1897	jb .error_bad_len
		1898	test eax, 3
		1899	jnz .error_bad_len
		1900	sub [esi+INODE.fileSize], eax
		1901	add ebx, eax
		1902	cmp ebx, [edi+24]
		1903	jb .wanted_start
		1904	push .wanted_start
		1905	jmp .end_block
		1906
6798	pathoswith	1907	.utf8:
		1908	rep movsb
		1909	mov byte [edi], 0
		1910	add edx, 40+520
		1911	jmp @b
		1912
6471	pathoswith	1913	.utf16:
		1914	call utf8to16
		1915	stosw
		1916	cmp esi, ecx
		1917	jc .utf16
		1918	and word [edi], 0
		1919	add edx, 40+520
		1920	jmp @b
		1921
6462	pathoswith	1922	.end_dir:
		1923	call ext_unlock
		1924	mov edx, [edi+28]
		1925	mov ebx, [edi+8]
		1926	mov ecx, [edi+4]
		1927	mov dword [edx], 1 ; version
		1928	mov [edx+4], ebx
		1929	mov [edx+8], ecx
		1930	lea esp, [edi+32]
		1931	mov ecx, 20/4
		1932	lea edi, [edx+12]
		1933	xor eax, eax
		1934	rep stosd
		1935	ret
		1936
		1937	.error_bad_len:
		1938	movi eax, ERROR_FS_FAIL
		1939	.error_read_subinode:
		1940	.error_get_block:
		1941	lea esp, [edi+32]
		1942	.error_ret:
6880	pathoswith	1943	xor ebx, ebx
6462	pathoswith	1944	push eax
		1945	call ext_unlock
		1946	pop eax
		1947	ret
		1948
		1949	.error_empty_dir:
		1950	movi eax, ERROR_FS_FAIL
		1951	jmp .error_ret
		1952
		1953	.error_not_found:
		1954	movi eax, ERROR_FILE_NOT_FOUND
		1955	jmp .error_ret
		1956
		1957	;----------------------------------------------------------------
		1958	ext_ReadFile:
		1959	call ext_lock
6468	pathoswith	1960	call findInode
6849	pathoswith	1961	pushd 0 eax
6726	pathoswith	1962	jc .ret
6558	pathoswith	1963	lea esi, [ebp+EXTFS.inodeBuffer]
6726	pathoswith	1964	mov byte [esp], ERROR_ACCESS_DENIED
		1965	test [esi+INODE.accessMode], FLAG_FILE
		1966	jz .ret ; not a file
		1967	mov byte [esp], ERROR_END_OF_FILE
		1968	mov eax, [esi+INODE.fileSize]
		1969	mov edx, [esi+INODE.fileSizeHigh]
		1970	sub eax, [ebx+4]
		1971	sbb edx, [ebx+8]
		1972	jc .ret
6462	pathoswith	1973	mov ecx, [ebx+12]
6726	pathoswith	1974	sub eax, ecx
		1975	sbb edx, 0
		1976	jc @f
		1977	xor eax, eax
		1978	mov [esp], eax
		1979	@@:
		1980	add ecx, eax
6462	pathoswith	1981	mov eax, [ebx+4]
		1982	mov edx, [ebx+8]
6726	pathoswith	1983	mov edi, [ebx+16]
6462	pathoswith	1984	div [ebp+EXTFS.bytesPerBlock]
6726	pathoswith	1985	test edx, edx
		1986	jz .aligned
		1987	.piece:
		1988	push eax ecx
		1989	mov esi, edx
6462	pathoswith	1990	mov ecx, eax
6726	pathoswith	1991	call extfsGetExtent
		1992	jc .errorGet
		1993	mov ecx, [ebp+EXTFS.sectorsPerBlock]
		1994	mul ecx
6462	pathoswith	1995	mov ebx, [ebp+EXTFS.mainBlockBuffer]
6726	pathoswith	1996	call fs_read64_sys
		1997	test eax, eax
		1998	jnz .errorRead
		1999	pop eax
		2000	mov ecx, [ebp+EXTFS.bytesPerBlock]
		2001	sub ecx, esi
		2002	sub eax, ecx
		2003	jnc @f
		2004	add ecx, eax
		2005	xor eax, eax
		2006	@@:
		2007	add esi, ebx
		2008	add [esp+8], ecx
6462	pathoswith	2009	rep movsb
6726	pathoswith	2010	mov ecx, eax
		2011	pop eax
		2012	inc eax
6462	pathoswith	2013	xor edx, edx
6726	pathoswith	2014	jecxz .ret
		2015	.aligned:
		2016	xchg eax, ecx
6462	pathoswith	2017	div [ebp+EXTFS.bytesPerBlock]
6726	pathoswith	2018	push edx
		2019	mov edx, eax
		2020	.writeExtent:
		2021	test edx, edx
		2022	jz .end
		2023	push ecx
		2024	call extfsGetExtent
		2025	jc .errorGet
		2026	sub edx, ecx
		2027	jnc @f
		2028	add ecx, edx
		2029	xor edx, edx
6462	pathoswith	2030	@@:
6726	pathoswith	2031	add [esp], ecx
		2032	imul ecx, [ebp+EXTFS.sectorsPerBlock]
		2033	mov ebx, edi
		2034	push edx ecx
		2035	mul [ebp+EXTFS.sectorsPerBlock]
		2036	call fs_read64_sys
		2037	pop ecx edx
		2038	test eax, eax
		2039	jnz .errorRead
		2040	shl ecx, 9
		2041	add edi, ecx
		2042	add [esp+12], ecx
		2043	pop ecx
		2044	jmp .writeExtent
6462	pathoswith	2045
6726	pathoswith	2046	.end:
6462	pathoswith	2047	mov eax, ecx
6726	pathoswith	2048	pop ecx
		2049	jecxz .ret
		2050	jmp .piece
6462	pathoswith	2051
6726	pathoswith	2052	.errorRead:
		2053	movi eax, ERROR_DEVICE
		2054	.errorGet:
6462	pathoswith	2055	pop ebx ebx
6726	pathoswith	2056	mov [esp], eax
		2057	.ret:
6462	pathoswith	2058	call ext_unlock
6726	pathoswith	2059	pop eax ebx
6462	pathoswith	2060	ret
		2061
		2062	;----------------------------------------------------------------
		2063	ext_GetFileInfo:
6871	pathoswith	2064	cmp byte [esi], 0
		2065	jz .volume
6462	pathoswith	2066	call ext_lock
6468	pathoswith	2067	call findInode
6871	pathoswith	2068	jc .ret
6558	pathoswith	2069	lea esi, [ebp+EXTFS.inodeBuffer]
6849	pathoswith	2070	mov edx, [ebx+16]
6522	pathoswith	2071	mov bl, [edi]
6462	pathoswith	2072	xor eax, eax
		2073	mov edi, edx
		2074	mov ecx, 40/4
		2075	rep stosd
		2076	cmp bl, '.'
		2077	jne @f
		2078	or dword [edx], KOS_HIDDEN
		2079	@@:
		2080	or dword [edx], KOS_DIRECTORY
6522	pathoswith	2081	test [esi+INODE.accessMode], FLAG_FILE
		2082	jz @f
6462	pathoswith	2083	xor dword [edx], KOS_DIRECTORY ; mark as file
		2084	mov eax, [esi+INODE.fileSize]
		2085	mov ebx, [esi+INODE.fileSizeHigh]
		2086	mov dword [edx+32], eax
		2087	mov dword [edx+36], ebx
		2088	@@:
		2089	lea edi, [edx+8]
		2090	mov eax, [esi+INODE.inodeModified]
		2091	sub eax, 978307200 ; 01.01.1970-01.01.2001 = (36531+8)246060
		2092	call fsTime2bdfe
		2093
		2094	mov eax, [esi+INODE.accessedTime]
		2095	sub eax, 978307200
		2096	call fsTime2bdfe
		2097
		2098	mov eax, [esi+INODE.dataModified]
		2099	sub eax, 978307200
		2100	call fsTime2bdfe
6871	pathoswith	2101	xor eax, eax
		2102	.ret:
		2103	push eax
6462	pathoswith	2104	call ext_unlock
6871	pathoswith	2105	pop eax
6876	pathoswith	2106	@@:
6871	pathoswith	2107	ret
		2108
		2109	.volume:
		2110	mov eax, dword[ebp+EXTFS.Length]
		2111	mov edx, dword[ebp+EXTFS.Length+4]
		2112	mov edi, [ebx+16]
		2113	shld edx, eax, 9
		2114	shl eax, 9
		2115	mov [edi+36], edx
		2116	mov [edi+32], eax
		2117	mov eax, [ebx+8]
		2118	mov byte [edi], 8
		2119	mov [edi+4], eax
6876	pathoswith	2120	test eax, eax
		2121	jz @b
6871	pathoswith	2122	lea esi, [ebp+EXTFS.superblock.volumeLabel]
		2123	mov ecx, 16
		2124	add edi, 40
		2125	cmp eax, 3
		2126	jz .utf8
		2127	add ecx, esi
		2128	cmp eax, 2
		2129	jz .utf16
		2130	@@:
		2131	call utf8to16
		2132	call uni2ansi_char
		2133	stosb
		2134	cmp esi, ecx
		2135	jc @b
		2136	jmp @f
		2137
		2138	.utf8:
		2139	rep movsb
		2140	jmp @f
		2141
		2142	.utf16:
		2143	call utf8to16
		2144	stosw
		2145	cmp esi, ecx
		2146	jc .utf16
		2147	@@:
6462	pathoswith	2148	xor eax, eax
6871	pathoswith	2149	mov [edi], ax
6462	pathoswith	2150	ret
		2151
		2152	;----------------------------------------------------------------
		2153	ext_SetFileInfo:
		2154	call extfsWritingInit
6468	pathoswith	2155	call findInode
6462	pathoswith	2156	jc @f
6849	pathoswith	2157	push esi
		2158	mov esi, [ebx+16]
		2159	add esi, 16
6558	pathoswith	2160	lea edi, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	2161	call fsCalculateTime
		2162	add eax, 978307200 ; 01.01.1970-01.01.2001 = (36531+8)246060
		2163	mov [edi+INODE.accessedTime], eax
		2164
		2165	add esi, 8
		2166	call fsCalculateTime
		2167	add eax, 978307200
		2168	mov [edi+INODE.dataModified], eax
		2169	mov ebx, edi
		2170	pop eax
		2171	call writeInode
		2172	@@:
		2173	push eax
		2174	jc @f
		2175	call writeSuperblock
		2176	mov esi, [ebp+PARTITION.Disk]
		2177	call disk_sync
		2178	@@:
		2179	call ext_unlock
		2180	pop eax
		2181	ret
		2182
		2183	;----------------------------------------------------------------
		2184	ext_Delete:
		2185	call extfsWritingInit
6468	pathoswith	2186	call findInode
6853	pathoswith	2187	jc .error
		2188	push ecx
		2189	movzx edi, [ebp+EXTFS.inodeBuffer.accessMode]
		2190	and edi, TYPE_MASK
		2191	cmp edi, DIRECTORY
6462	pathoswith	2192	jne .file
6726	pathoswith	2193	xor ecx, ecx
6462	pathoswith	2194	.checkDirectory:
6726	pathoswith	2195	push ecx
		2196	call extfsGetExtent
		2197	jc .empty
6462	pathoswith	2198	mov ebx, [ebp+EXTFS.tempBlockBuffer]
		2199	call extfsReadBlock
6853	pathoswith	2200	jc .error8
6462	pathoswith	2201	mov edx, ebx
		2202	add edx, [ebp+EXTFS.bytesPerBlock]
		2203	.dir_entry:
6853	pathoswith	2204	movzx ecx, [ebx+DIRENTRY.nameLength]
		2205	mov ax, word [ebx+DIRENTRY.name]
		2206	jecxz @f
		2207	cmp al, '.'
		2208	jnz .not_empty
		2209	dec ecx
		2210	jz @f
		2211	cmp al, ah
		2212	jnz .not_empty
		2213	dec ecx
		2214	jnz .not_empty
6462	pathoswith	2215	@@:
6853	pathoswith	2216	mov cx, [ebx+DIRENTRY.entryLength]
		2217	jecxz @f
6462	pathoswith	2218	add ebx, ecx
		2219	cmp ebx, edx
		2220	jb .dir_entry
6853	pathoswith	2221	@@:
6726	pathoswith	2222	pop ecx
		2223	inc ecx
6462	pathoswith	2224	jmp .checkDirectory
		2225
6756	pathoswith	2226	.not_empty:
		2227	pop eax eax
		2228	push ERROR_ACCESS_DENIED
		2229	jmp .ret
		2230
6853	pathoswith	2231	.error8:
		2232	pop ebx
		2233	.error4:
		2234	pop ebx
		2235	.error:
		2236	push eax
		2237	jmp .ret
		2238
6462	pathoswith	2239	.empty:
6853	pathoswith	2240	pop ecx ecx
6726	pathoswith	2241	cmp eax, ERROR_END_OF_FILE
6853	pathoswith	2242	jnz .error
		2243	push ecx
6462	pathoswith	2244	.file:
6522	pathoswith	2245	mov eax, ecx
6462	pathoswith	2246	call unlinkInode
6853	pathoswith	2247	jc .error4
		2248	pop eax
		2249	lea ebx, [ebp+EXTFS.inodeBuffer]
		2250	cmp edi, DIRECTORY
		2251	jnz @f
		2252	dec [ebx+INODE.linksCount]
		2253	call writeInode
		2254	@@:
		2255	mov eax, esi
		2256	call readInode
		2257	jc .error
		2258	dec [ebx+INODE.linksCount]
6462	pathoswith	2259	jz @f
6853	pathoswith	2260	cmp edi, DIRECTORY
		2261	jnz .hardlinks
6462	pathoswith	2262	@@:
6853	pathoswith	2263	push esi edi
6849	pathoswith	2264	xor eax, eax
		2265	xor edx, edx
6643	pathoswith	2266	call extfsTruncateFile ; free file's data
6778	pathoswith	2267	movzx ecx, [ebp+EXTFS.superblock.inodeSize]
		2268	lea edi, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	2269	xor eax, eax
6849	pathoswith	2270	push edi
6462	pathoswith	2271	rep stosb
		2272	call fsGetTime
6853	pathoswith	2273	pop ebx edi esi
6462	pathoswith	2274	add eax, 978307200
6778	pathoswith	2275	mov [ebx+INODE.deletedTime], eax
6853	pathoswith	2276	mov eax, esi
6462	pathoswith	2277	dec eax
		2278	xor edx, edx
		2279	div [ebp+EXTFS.superblock.inodesPerGroup]
6848	pathoswith	2280	push edx
		2281	mov ebx, [ebp+EXTFS.descriptorTable]
		2282	shl eax, 5
		2283	add ebx, eax
6853	pathoswith	2284	cmp edi, DIRECTORY
6756	pathoswith	2285	jnz @f
		2286	dec [ebx+BGDESCR.directoriesCount]
		2287	@@:
		2288	inc [ebx+BGDESCR.inodesFree]
6848	pathoswith	2289	push [ebx+BGDESCR.inodeBitmap]
		2290	call extfsWriteDescriptor
6462	pathoswith	2291	pop eax
6756	pathoswith	2292	mov ebx, [ebp+EXTFS.tempBlockBuffer]
6848	pathoswith	2293	mov ecx, eax
6756	pathoswith	2294	call extfsReadBlock
6853	pathoswith	2295	pop edx
		2296	jc .error
		2297	mov eax, edx
6756	pathoswith	2298	and edx, 31
		2299	shr eax, 5
		2300	shl eax, 2
		2301	add eax, ebx
		2302	btr [eax], edx
		2303	mov eax, ecx
		2304	call extfsWriteBlock
		2305	inc [ebp+EXTFS.superblock.inodesFree]
6853	pathoswith	2306	.hardlinks:
		2307	mov eax, esi
		2308	lea ebx, [ebp+EXTFS.inodeBuffer]
		2309	call writeInode
6462	pathoswith	2310	push eax
		2311	call writeSuperblock
		2312	mov esi, [ebp+PARTITION.Disk]
		2313	call disk_sync
		2314	.ret:
		2315	call ext_unlock
		2316	xor ebx, ebx
		2317	pop eax
		2318	ret
		2319
		2320	;----------------------------------------------------------------
		2321	ext_CreateFolder:
		2322	call extfsWritingInit
6468	pathoswith	2323	call findInode
6462	pathoswith	2324	jnc .success ; exist
6522	pathoswith	2325	test edi, edi
		2326	jz .error
6462	pathoswith	2327	mov eax, esi
6643	pathoswith	2328	call extfsInodeAlloc
6462	pathoswith	2329	jc .error
		2330	push ebx esi edi
6558	pathoswith	2331	lea edi, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	2332	movzx ecx, [ebp+EXTFS.superblock.inodeSize]
6852	pathoswith	2333	xor eax, eax
6462	pathoswith	2334	rep stosb
		2335	call fsGetTime
		2336	add eax, 978307200
6852	pathoswith	2337	lea ebx, [ebp+EXTFS.inodeBuffer]
		2338	mov [ebx+INODE.accessedTime], eax
		2339	mov [ebx+INODE.dataModified], eax
6462	pathoswith	2340	pop edi esi edx
		2341	; edx = allocated inode number, edi -> filename, esi = parent inode number
6861	pathoswith	2342	mov [ebx+INODE.accessMode], DIRECTORY or 511
6462	pathoswith	2343	mov eax, edx
		2344	call writeInode
		2345	jc .error
		2346	; link to self
		2347	push edx esi
		2348	mov eax, edx
		2349	mov ebx, eax
		2350	mov dl, DIR_DIRECTORY
		2351	mov esi, self_link
		2352	call linkInode
		2353	pop esi edx
		2354	jc .error
		2355	; link to parent
		2356	push edx esi
		2357	mov eax, ebx
		2358	mov ebx, esi
		2359	mov dl, DIR_DIRECTORY
		2360	mov esi, parent_link
		2361	call linkInode
		2362	pop esi edx
		2363	jc .error
		2364	; link parent to child
		2365	mov eax, esi
		2366	mov ebx, edx
		2367	mov esi, edi
		2368	mov dl, DIR_DIRECTORY
		2369	call linkInode
		2370	jc .error
		2371	mov eax, ebx
		2372	dec eax
		2373	xor edx, edx
		2374	div [ebp+EXTFS.superblock.inodesPerGroup]
6848	pathoswith	2375	mov ebx, [ebp+EXTFS.descriptorTable]
		2376	shl eax, 5
		2377	add ebx, eax
6756	pathoswith	2378	inc [ebx+BGDESCR.directoriesCount]
6462	pathoswith	2379	call extfsWriteDescriptor
		2380	.success:
		2381	.error:
		2382	push eax
		2383	call writeSuperblock
		2384	mov esi, [ebp+PARTITION.Disk]
		2385	call disk_sync
		2386	call ext_unlock
		2387	pop eax
		2388	ret
		2389
		2390	self_link db ".", 0
		2391	parent_link db "..", 0
		2392
		2393	;----------------------------------------------------------------
		2394	ext_CreateFile:
		2395	call extfsWritingInit
6726	pathoswith	2396	pushd 0 0 ebx
6468	pathoswith	2397	call findInode
6522	pathoswith	2398	jnc .exist
		2399	test edi, edi
		2400	jz .error
6462	pathoswith	2401	mov eax, esi
6643	pathoswith	2402	call extfsInodeAlloc
6462	pathoswith	2403	jc .error
6522	pathoswith	2404	push ebx ebx esi edi
6558	pathoswith	2405	lea edi, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	2406	movzx ecx, [ebp+EXTFS.superblock.inodeSize]
6852	pathoswith	2407	xor eax, eax
6462	pathoswith	2408	rep stosb
		2409	call fsGetTime
		2410	add eax, 978307200
6852	pathoswith	2411	lea ebx, [ebp+EXTFS.inodeBuffer]
		2412	mov [ebx+INODE.accessedTime], eax
		2413	mov [ebx+INODE.dataModified], eax
6462	pathoswith	2414	pop edi esi edx
		2415	; edx = allocated inode number, edi -> filename, esi = parent inode number
6861	pathoswith	2416	mov [ebx+INODE.accessMode], FLAG_FILE or 110110110b
6462	pathoswith	2417	mov eax, edx
		2418	call writeInode
6522	pathoswith	2419	jc .error2
6462	pathoswith	2420	; link parent to child
		2421	mov eax, esi
		2422	mov ebx, edx
		2423	mov esi, edi
		2424	mov dl, DIR_FLAG_FILE
		2425	call linkInode
6522	pathoswith	2426	jc .error2
6462	pathoswith	2427	pop esi ebx
6849	pathoswith	2428	mov eax, [ebx+12]
		2429	xor edx, edx
6522	pathoswith	2430	jmp ext_WriteFile.start
6462	pathoswith	2431
6522	pathoswith	2432	.exist:
		2433	movi eax, ERROR_ACCESS_DENIED
6726	pathoswith	2434	test [ebp+EXTFS.inodeBuffer.accessMode], FLAG_FILE
6522	pathoswith	2435	jz .error ; not a file
		2436	pop ebx
6849	pathoswith	2437	mov eax, [ebx+12]
		2438	xor edx, edx
		2439	push eax edx ebx esi
6522	pathoswith	2440	call extfsTruncateFile
6849	pathoswith	2441	pop esi ebx edx eax
6643	pathoswith	2442	jmp ext_WriteFile.start
		2443
6522	pathoswith	2444	.error2:
		2445	pop ebx
6462	pathoswith	2446	.error:
		2447	push eax
		2448	call ext_unlock
6726	pathoswith	2449	pop eax ebx ebx ebx
6462	pathoswith	2450	ret
		2451
		2452	;----------------------------------------------------------------
		2453	ext_WriteFile:
		2454	call extfsWritingInit
6468	pathoswith	2455	call findInode
6726	pathoswith	2456	pushd 0 eax
		2457	jc .ret
		2458	mov byte [esp], ERROR_ACCESS_DENIED
		2459	test [ebp+EXTFS.inodeBuffer.accessMode], FLAG_FILE
		2460	jz .ret ; not a file
6849	pathoswith	2461	mov byte [esp], 0
		2462	mov eax, [ebx+4]
		2463	mov edx, [ebx+8]
		2464	add eax, [ebx+12]
		2465	adc edx, 0
6522	pathoswith	2466	.start:
6726	pathoswith	2467	push esi
6849	pathoswith	2468	mov ecx, esi
6462	pathoswith	2469	call extfsExtendFile
6726	pathoswith	2470	jc .errorExtend
		2471	mov eax, [ebx+4]
6849	pathoswith	2472	mov edx, [ebx+8]
6643	pathoswith	2473	mov ecx, [ebx+12]
6726	pathoswith	2474	mov esi, [ebx+16]
		2475	.write:
6861	pathoswith	2476	jecxz .zero
6462	pathoswith	2477	div [ebp+EXTFS.bytesPerBlock]
		2478	test edx, edx
6726	pathoswith	2479	jz .aligned
		2480	.piece:
		2481	mov ebx, ecx
		2482	mov edi, edx
		2483	mov ecx, eax
		2484	push eax
		2485	call extfsGetExtent
		2486	jc .errorGet
		2487	mov ecx, [ebp+EXTFS.sectorsPerBlock]
		2488	mul ecx
		2489	push ecx eax ebx
		2490	mov ebx, [ebp+EXTFS.mainBlockBuffer]
		2491	call fs_read64_sys
		2492	test eax, eax
		2493	jnz .errorDevice
		2494	pop eax
		2495	mov ecx, [ebp+EXTFS.bytesPerBlock]
		2496	sub ecx, edi
		2497	sub eax, ecx
		2498	jnc @f
		2499	add ecx, eax
		2500	xor eax, eax
6462	pathoswith	2501	@@:
6726	pathoswith	2502	add edi, ebx
		2503	add [esp+20], ecx
		2504	rep movsb
6575	pathoswith	2505	mov edi, eax
6726	pathoswith	2506	pop eax ecx
6462	pathoswith	2507	xor edx, edx
6726	pathoswith	2508	call fs_write64_sys
		2509	mov ecx, edi
		2510	pop eax
		2511	inc eax
6462	pathoswith	2512	xor edx, edx
6861	pathoswith	2513	.zero:
6726	pathoswith	2514	jecxz .done
		2515	.aligned:
		2516	xchg eax, ecx
6462	pathoswith	2517	div [ebp+EXTFS.bytesPerBlock]
6726	pathoswith	2518	push edx
		2519	mov edx, eax
		2520	.writeExtent:
		2521	test edx, edx
		2522	jz .end
6462	pathoswith	2523	push ecx
6726	pathoswith	2524	call extfsGetExtent
		2525	jc .errorGet2
		2526	sub edx, ecx
		2527	jnc @f
		2528	add ecx, edx
		2529	xor edx, edx
		2530	@@:
		2531	add [esp], ecx
		2532	imul ecx, [ebp+EXTFS.sectorsPerBlock]
		2533	mov ebx, esi
		2534	push edx ecx
		2535	mul [ebp+EXTFS.sectorsPerBlock]
		2536	call fs_write64_sys
		2537	test eax, eax
		2538	jnz .errorDevice
		2539	pop ebx edx ecx
		2540	shl ebx, 9
		2541	add esi, ebx
		2542	add [esp+12], ebx
		2543	jmp .writeExtent
		2544
		2545	.end:
		2546	mov eax, ecx
6462	pathoswith	2547	pop ecx
6726	pathoswith	2548	jecxz .done
		2549	jmp .piece
		2550
		2551	.errorDevice:
		2552	pop eax eax
		2553	movi eax, ERROR_DEVICE
		2554	.errorGet2:
		2555	pop ebx
		2556	.errorGet:
		2557	pop ebx
		2558	.errorExtend:
		2559	mov [esp+4], eax
		2560	.done:
6558	pathoswith	2561	lea ebx, [ebp+EXTFS.inodeBuffer]
6726	pathoswith	2562	pop eax
6462	pathoswith	2563	call writeInode
6726	pathoswith	2564	add [esp], eax
6462	pathoswith	2565	call writeSuperblock
		2566	mov esi, [ebp+PARTITION.Disk]
		2567	call disk_sync
6726	pathoswith	2568	.ret:
6462	pathoswith	2569	call ext_unlock
6726	pathoswith	2570	pop eax ebx
6462	pathoswith	2571	ret
		2572
6726	pathoswith	2573	.erase:
6849	pathoswith	2574	push eax eax edi
6726	pathoswith	2575	mov eax, ebx
		2576	jmp .write
6462	pathoswith	2577
		2578	;----------------------------------------------------------------
		2579	ext_SetFileEnd:
		2580	call extfsWritingInit
6468	pathoswith	2581	call findInode
6643	pathoswith	2582	jc .error2
6575	pathoswith	2583	lea edi, [ebp+EXTFS.inodeBuffer]
		2584	movi eax, ERROR_ACCESS_DENIED
6726	pathoswith	2585	test [edi+INODE.accessMode], FLAG_FILE
		2586	jz .error2 ; not a file
6849	pathoswith	2587	mov eax, [ebx+4]
		2588	mov edx, [ebx+8]
6575	pathoswith	2589	mov ebx, [edi+INODE.fileSize]
6849	pathoswith	2590	mov ecx, [edi+INODE.fileSizeHigh]
		2591	push esi ecx
		2592	cmp ebx, eax
		2593	sbb ecx, edx
		2594	mov ecx, esi
6726	pathoswith	2595	jnc @f
6575	pathoswith	2596	call extfsExtendFile
6849	pathoswith	2597	pop esi
6575	pathoswith	2598	jc .error
6849	pathoswith	2599	mov eax, [edi+INODE.fileSize]
		2600	mov edx, [edi+INODE.fileSizeHigh]
		2601	sub eax, ebx
		2602	sbb edx, esi
		2603	jnz .done
		2604	cmp eax, 1000001h
6726	pathoswith	2605	jnc .done
6849	pathoswith	2606	push eax
		2607	stdcall kernel_alloc, eax
6726	pathoswith	2608	pop ecx
		2609	test eax, eax
		2610	jz .error
		2611	push ecx
		2612	add ecx, 3
		2613	shr ecx, 2
6849	pathoswith	2614	mov edx, esi
6726	pathoswith	2615	mov esi, eax
6575	pathoswith	2616	mov edi, eax
		2617	xor eax, eax
6726	pathoswith	2618	rep stosd
6849	pathoswith	2619	pop ecx edi
6726	pathoswith	2620	push esi
		2621	call ext_WriteFile.erase
		2622	call kernel_free
6575	pathoswith	2623	xor eax, eax
6726	pathoswith	2624	ret
		2625
6575	pathoswith	2626	@@:
6726	pathoswith	2627	call extfsTruncateFile
6849	pathoswith	2628	pop eax
6575	pathoswith	2629	.done:
6643	pathoswith	2630	xor eax, eax
		2631	.error:
		2632	xchg eax, [esp]
6558	pathoswith	2633	lea ebx, [ebp+EXTFS.inodeBuffer]
6462	pathoswith	2634	call writeInode
6726	pathoswith	2635	add [esp], eax
6462	pathoswith	2636	call writeSuperblock
		2637	mov esi, [ebp+PARTITION.Disk]
		2638	call disk_sync
6726	pathoswith	2639	pop eax
6643	pathoswith	2640	.error2:
6726	pathoswith	2641	push eax
6462	pathoswith	2642	call ext_unlock
		2643	pop eax
		2644	ret

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(root)/kernel/trunk/fs/ext.inc – Rev 6880