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

Rev	Author	Line No.	Line
431	serge	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
		4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		7
593	mikedld	8	$Revision: 649 $
		9
		10
65	mario79	11	;*************************************************************
578	mario79	12	;* 12.07.2007 Check all 4 entry of MBR and EMBR
		13	;* 29.04.2006 Elimination of hangup after the
		14	;* expiration hd_wait_timeout - Mario79
		15	;* 28.01.2006 find all Fat16/32 partition in all input point
		16	;* to MBR - Mario79
65	mario79	17	;*************************************************************
		18
277	diamond	19	uglobal
65	mario79	20	align 4
256	diamond	21
65	mario79	22	;******************************************************
431	serge	23	; Please do not change this place - variables in text
65	mario79	24	; Mario79
		25	; START place
		26	;******************************************************
		27	PARTITION_START dd 0x3f
		28	PARTITION_END dd 0
256	diamond	29	fs_type db 0 ; 0=none, 1=NTFS, 16=FAT16, 32=FAT32
277	diamond	30	align 4
256	diamond	31
		32	fs_dependent_data_start:
		33	; FATxx data
		34
65	mario79	35	SECTORS_PER_FAT dd 0x1f3a
		36	NUMBER_OF_FATS dd 0x2
		37	SECTORS_PER_CLUSTER dd 0x8
		38	BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes
		39	ROOT_CLUSTER dd 2 ; first rootdir cluster
		40	FAT_START dd 0 ; start of fat table
		41	ROOT_START dd 0 ; start of rootdir (only fat16)
		42	ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16)
		43	DATA_START dd 0 ; start of data area (=first cluster 2)
		44	LAST_CLUSTER dd 0 ; last availabe cluster
		45	ADR_FSINFO dd 0 ; used only by fat32
		46
		47	fatRESERVED dd 0x0FFFFFF6
		48	fatBAD dd 0x0FFFFFF7
		49	fatEND dd 0x0FFFFFF8
		50	fatMASK dd 0x0FFFFFFF
		51
649	diamond	52	fatStartScan dd 2
		53
256	diamond	54	fs_dependent_data_end:
321	diamond	55	file_system_data_size = $ - PARTITION_START
		56	if file_system_data_size > 96
		57	ERROR: sizeof(file system data) too big!
		58	end if
256	diamond	59
		60	virtual at fs_dependent_data_start
		61	; NTFS data
		62	ntfs_data:
		63	.sectors_per_cluster dd ?
		64	.mft_cluster dd ?
		65	.mftmirr_cluster dd ?
		66	.frs_size dd ? ; FRS size in bytes
		67	.iab_size dd ? ; IndexAllocationBuffer size in bytes
		68	.frs_buffer dd ?
		69	.iab_buffer dd ?
		70	.mft_retrieval dd ?
		71	.mft_retrieval_size dd ?
		72	.mft_retrieval_alloc dd ?
		73	.mft_retrieval_end dd ?
		74	.cur_index_size dd ?
		75	.cur_index_buf dd ?
		76	if $ > fs_dependent_data_end
		77	ERROR: increase sizeof(fs_dependent_data)!
		78	end if
		79	end virtual
		80
65	mario79	81	;***************************************************************************
		82	; End place
		83	; Mario79
		84	;***************************************************************************
277	diamond	85	endg
		86	iglobal
65	mario79	87
		88	partition_types: ; list of fat16/32 partitions
		89	db 0x04 ; DOS: fat16 <32M
		90	db 0x06 ; DOS: fat16 >32M
		91	db 0x0b ; WIN95: fat32
		92	db 0x0c ; WIN95: fat32, LBA-mapped
		93	db 0x0e ; WIN95: fat16, LBA-mapped
		94	db 0x14 ; Hidden DOS: fat16 <32M
		95	db 0x16 ; Hidden DOS: fat16 >32M
		96	db 0x1b ; Hidden WIN95: fat32
		97	db 0x1c ; Hidden WIN95: fat32, LBA-mapped
		98	db 0x1e ; Hidden WIN95: fat16, LBA-mapped
		99	db 0xc4 ; DRDOS/secured: fat16 <32M
		100	db 0xc6 ; DRDOS/secured: fat16 >32M
		101	db 0xcb ; DRDOS/secured: fat32
		102	db 0xcc ; DRDOS/secured: fat32, LBA-mapped
		103	db 0xce ; DRDOS/secured: fat16, LBA-mapped
		104	db 0xd4 ; Old Multiuser DOS secured: fat16 <32M
		105	db 0xd6 ; Old Multiuser DOS secured: fat16 >32M
256	diamond	106	db 0x07 ; NTFS
65	mario79	107	partition_types_end:
		108
		109
		110	extended_types: ; list of extended partitions
		111	db 0x05 ; DOS: extended partition
		112	db 0x0f ; WIN95: extended partition, LBA-mapped
		113	db 0xc5 ; DRDOS/secured: extended partition
		114	db 0xd5 ; Old Multiuser DOS secured: extended partition
		115	extended_types_end:
		116
		117	endg
		118
		119	; Partition chain used:
		120	; MBR ; PARTITION2 ; PARTITION3 ; PARTITION4
		121	;==========================================================
		122	; fat16/32 +-- fat16/32 +-- fat16/32 +-- fat16/32 +--
		123	; extended --+ extended --+ extended --+ extended --+
		124	; 0 0 0 0
		125	; 0 0 0 0
		126	; Notes:
		127	; - extended partition need to be in second entry on table
		128	; - it will skip over removed partitions
		129
		130	set_FAT32_variables:
		131	mov [problem_partition],0
		132	call reserve_hd1
321	diamond	133	call reserve_hd_channel
65	mario79	134
		135	cmp dword [hdpos],0
		136	je problem_hd
		137
		138	pushad
		139	xor ecx,ecx ; partition count
		140	mov edx,-1 ; flag for partition
		141	xor eax,eax ; read MBR
		142	xor ebp,ebp ; extended partition start
		143
		144	new_partition:
		145	test ebp,ebp ; is there extended partition?
		146	jnz extended_already_set ; yes
		147	xchg ebp,eax ; no. set it now
		148
		149	extended_already_set:
		150	add eax,ebp ; mbr=mbr+0, ext_part=ext_start+relat_start
		151	mov ebx,buffer
		152	call hd_read
74	mario79	153	cmp [hd_error],0
		154	jne problem_hd
65	mario79	155
		156	cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
		157	jnz end_partition_chain
		158	cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition
578	mario79	159	; jz next_partition
		160	jnz .next_primary_partition
		161	cmp dword [ebx+0x1be+0xc+16],0
		162	jnz next_primary_partition
		163	cmp dword [ebx+0x1be+0xc+16+16],0
		164	jnz next_primary_partition_1
		165	cmp dword [ebx+0x1be+0xc+16+16+16],0
		166	jnz next_primary_partition_2
		167	jmp next_partition
		168
		169	.next_primary_partition:
65	mario79	170	push eax
		171	mov al,[ebx+0x1be+4] ; get primary partition type
		172	call scan_partition_types
		173	pop eax
		174	jnz next_primary_partition ; no. skip over
		175
		176	inc ecx
		177	cmp ecx,[fat32part] ; is it wanted partition?
		178	jnz next_primary_partition ; no
		179
256	diamond	180	mov edx, eax ; start sector
		181	add edx, [ebx+0x1be+8] ; add relative start
		182	push edx
		183	add edx, [ebx+0x1be+12] ; add length
		184	dec edx ; PARTITION_END is inclusive
		185	mov [PARTITION_END], edx ; note that this can be changed
		186	; when file system data will be available
		187	mov dl, [ebx+0x1be+4]
		188	mov [fs_type], dl ; save for FS recognizer (separate FAT vs NTFS)
		189	pop edx
		190
65	mario79	191	next_primary_partition:
		192	push eax
		193	mov al,[ebx+0x1be+4+16] ; get primary partition type
		194	call scan_partition_types
		195	pop eax
		196	jnz next_primary_partition_1 ; no. skip over
		197
		198	inc ecx
		199	cmp ecx,[fat32part] ; is it wanted partition?
		200	jnz next_primary_partition_1 ; no
		201
256	diamond	202	mov edx, eax
		203	add edx, [ebx+0x1be+8+16]
		204	push edx
		205	add edx, [ebx+0x1be+12+16]
		206	dec edx
		207	mov [PARTITION_END], edx
		208	mov dl, [ebx+0x1be+4+16]
		209	mov [fs_type], dl
		210	pop edx
65	mario79	211
		212	next_primary_partition_1:
		213	push eax
		214	mov al,[ebx+0x1be+4+16+16] ; get primary partition type
		215	call scan_partition_types
		216	pop eax
		217	jnz next_primary_partition_2 ; no. skip over
		218
		219	inc ecx
		220	cmp ecx,[fat32part] ; is it wanted partition?
		221	jnz next_primary_partition_2 ; no
		222
256	diamond	223	mov edx, eax
		224	add edx, [ebx+0x1be+8+16+16]
		225	push edx
		226	add edx, [ebx+0x1be+12+16+16]
		227	dec edx
		228	mov [PARTITION_END], edx
		229	mov dl, [ebx+0x1be+4+16+16]
		230	mov [fs_type], dl
		231	pop edx
65	mario79	232
		233	next_primary_partition_2:
		234	push eax
		235	mov al,[ebx+0x1be+4+16+16+16] ; get primary partition type
		236	call scan_partition_types
		237	pop eax
		238	jnz next_partition ; no. skip over
		239
		240	inc ecx
		241	cmp ecx,[fat32part] ; is it wanted partition?
		242	jnz next_partition ; no
		243
256	diamond	244	mov edx, eax
		245	add edx, [ebx+0x1be+8+16+16+16]
		246	push edx
		247	add edx, [ebx+0x1be+12+16+16+16]
		248	dec edx
		249	mov [PARTITION_END], edx
		250	mov dl, [ebx+0x1be+4+16+16+16]
		251	mov [fs_type], dl
		252	pop edx
65	mario79	253
		254	next_partition:
		255	push eax
		256	mov al,[ebx+0x1be+4] ; get extended partition type
		257	call scan_extended_types
		258	pop eax
		259	jnz next_partition_1
		260
		261	mov eax,[ebx+0x1be+8] ; add relative start
		262	test eax,eax ; is there extended partition?
		263	jnz new_partition ; yes. read it
		264
		265	next_partition_1:
		266	push eax
		267	mov al,[ebx+0x1be+4+16] ; get extended partition type
		268	call scan_extended_types
		269	pop eax
		270	jnz next_partition_2
		271
		272	mov eax,[ebx+0x1be+8+16] ; add relative start
		273	test eax,eax ; is there extended partition?
		274	jnz new_partition ; yes. read it
		275
		276	next_partition_2:
		277	push eax
		278	mov al,[ebx+0x1be+4+16+16] ; get extended partition type
		279	call scan_extended_types
		280	pop eax
		281	jnz next_partition_3
		282
		283	mov eax,[ebx+0x1be+8+16+16] ; add relative start
		284	test eax,eax ; is there extended partition?
		285	jnz new_partition ; yes. read it
		286
		287	next_partition_3:
		288	push eax
		289	mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type
		290	call scan_extended_types
		291	pop eax
		292	jnz end_partition_chain ; no. end chain
		293
		294	mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition
		295	test eax,eax ; is there extended partition?
		296	jnz new_partition ; yes. read it
		297
		298	end_partition_chain:
		299	mov [partition_count],ecx
		300
		301	cmp edx,-1 ; found wanted partition?
		302	jnz hd_and_partition_ok ; yes. install it
		303	jmp problem_partition_or_fat
		304
		305	scan_partition_types:
		306	push ecx
		307	mov edi,partition_types
		308	mov ecx,partition_types_end-partition_types
		309	cld
		310	repne scasb ; is partition type ok?
		311	pop ecx
		312	ret
		313
		314	scan_extended_types:
		315	push ecx
		316	mov edi,extended_types
		317	mov ecx,extended_types_end-extended_types
		318	cld
		319	repne scasb ; is it extended partition?
		320	pop ecx
		321	ret
		322
		323	problem_fat_dec_count: ; bootsector is missing or another problem
		324	dec [partition_count] ; remove it from partition_count
		325
		326	problem_partition_or_fat:
		327	popad
		328
		329	problem_hd:
256	diamond	330	mov [fs_type],0
321	diamond	331	call free_hd_channel
65	mario79	332	mov [hd1_status],0 ; free
		333	mov [problem_partition],1
		334	ret
		335
		336	hd_and_partition_ok:
		337	mov eax,edx
		338	mov [PARTITION_START],eax
256	diamond	339	mov edx, [PARTITION_END]
		340	sub edx, eax
		341	inc edx ; edx = length of partition
65	mario79	342
256	diamond	343	; mov [hd_setup],1
65	mario79	344	mov ebx,buffer
		345	call hd_read ; read boot sector of partition
256	diamond	346	cmp [hd_error], 0
		347	jz boot_read_ok
		348	cmp [fs_type], 7
		349	jnz problem_fat_dec_count
		350	; NTFS duplicates bootsector:
		351	; NT4/2k/XP+ saves bootsector copy in the end of disk
		352	; NT 3.51 saves bootsector copy in the middle of disk
		353	and [hd_error], 0
		354	mov eax, [PARTITION_END]
		355	call hd_read
		356	cmp [hd_error], 0
		357	jnz @f
		358	call ntfs_test_bootsec
		359	jnc boot_read_ok
		360	@@:
		361	and [hd_error], 0
		362	mov eax, edx
		363	shr eax, 1
		364	add eax, [PARTITION_START]
		365	call hd_read
		366	cmp [hd_error], 0
		367	jnz problem_fat_dec_count ; �� 졠...
		368	boot_read_ok:
		369	; mov [hd_setup], 0
		370	; if we are running on NTFS, check bootsector
		371	cmp [fs_type], 7
		372	jz ntfs_setup
74	mario79	373
65	mario79	374	cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
		375	jnz problem_fat_dec_count
		376
		377	movzx eax,word [ebx+0xe] ; sectors reserved
		378	add eax,[PARTITION_START]
		379	mov [FAT_START],eax ; fat_start = partition_start + reserved
		380
		381	movzx eax,byte [ebx+0xd] ; sectors per cluster
		382	mov [SECTORS_PER_CLUSTER],eax
		383
		384	movzx ecx,word [ebx+0xb] ; bytes per sector
		385	mov [BYTES_PER_SECTOR],ecx
		386
		387	movzx eax,word [ebx+0x11] ; count of rootdir entries (=0 fat32)
		388	mov edx,32
		389	mul edx
		390	dec ecx
		391	add eax,ecx ; round up if not equal count
		392	inc ecx ; bytes per sector
		393	div ecx
		394	mov [ROOT_SECTORS],eax ; count of rootdir sectors
		395
		396	movzx eax,word [ebx+0x16] ; sectors per fat <65536
		397	test eax,eax
		398	jnz fat16_fatsize
		399	mov eax,[ebx+0x24] ; sectors per fat
		400	fat16_fatsize:
		401	mov [SECTORS_PER_FAT],eax
		402
		403	movzx eax,byte [ebx+0x10] ; number of fats
		404	test eax,eax ; if 0 it's not fat partition
		405	jz problem_fat_dec_count
		406	mov [NUMBER_OF_FATS],eax
		407	imul eax,[SECTORS_PER_FAT]
		408	add eax,[FAT_START]
		409	mov [ROOT_START],eax ; rootdir = fat_start + fat_size * fat_count
		410	add eax,[ROOT_SECTORS] ; rootdir sectors should be 0 on fat32
		411	mov [DATA_START],eax ; data area = rootdir + rootdir_size
		412
		413	movzx eax,word [ebx+0x13] ; total sector count <65536
		414	test eax,eax
		415	jnz fat16_total
		416	mov eax,[ebx+0x20] ; total sector count
		417	fat16_total:
		418	add eax,[PARTITION_START]
		419	dec eax
		420	mov [PARTITION_END],eax
		421	inc eax
		422	sub eax,[DATA_START] ; eax = count of data sectors
		423	xor edx,edx
		424	div dword [SECTORS_PER_CLUSTER]
		425	inc eax
		426	mov [LAST_CLUSTER],eax
		427	dec eax ; cluster count
649	diamond	428	mov [fatStartScan],2
65	mario79	429
		430	; limits by Microsoft Hardware White Paper v1.03
		431	cmp eax,4085 ; 0xff5
		432	jb problem_fat_dec_count ; fat12 not supported
		433	cmp eax,65525 ; 0xfff5
		434	jb fat16_partition
		435
		436	fat32_partition:
		437	mov eax,[ebx+0x2c] ; rootdir cluster
		438	mov [ROOT_CLUSTER],eax
		439	movzx eax,word [ebx+0x30] ; fs info sector
		440	add eax,[PARTITION_START]
		441	mov [ADR_FSINFO],eax
649	diamond	442	call hd_read
		443	mov eax,[ebx+0x1ec]
		444	cmp eax,-1
		445	jz @f
		446	mov [fatStartScan],eax
		447	@@:
65	mario79	448
		449	popad
		450
		451	mov [fatRESERVED],0x0FFFFFF6
		452	mov [fatBAD],0x0FFFFFF7
		453	mov [fatEND],0x0FFFFFF8
		454	mov [fatMASK],0x0FFFFFFF
256	diamond	455	mov [fs_type],32 ; Fat32
321	diamond	456	call free_hd_channel
65	mario79	457	mov [hd1_status],0 ; free
		458	ret
		459
		460	fat16_partition:
		461	xor eax,eax
		462	mov [ROOT_CLUSTER],eax
		463
		464	popad
		465
		466	mov [fatRESERVED],0x0000FFF6
		467	mov [fatBAD],0x0000FFF7
		468	mov [fatEND],0x0000FFF8
		469	mov [fatMASK],0x0000FFFF
256	diamond	470	mov [fs_type],16 ; Fat16
321	diamond	471	call free_hd_channel
65	mario79	472	mov [hd1_status],0 ; free
		473	ret

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(root)/kernel/trunk/fs/part_set.inc @ 1379 – Rev 649