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: 709 $
		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
709	diamond	107	db 0x27 ; NTFS, hidden
65	mario79	108	partition_types_end:
		109
		110
		111	extended_types: ; list of extended partitions
		112	db 0x05 ; DOS: extended partition
		113	db 0x0f ; WIN95: extended partition, LBA-mapped
		114	db 0xc5 ; DRDOS/secured: extended partition
		115	db 0xd5 ; Old Multiuser DOS secured: extended partition
		116	extended_types_end:
		117
		118	endg
		119
		120	; Partition chain used:
		121	; MBR ; PARTITION2 ; PARTITION3 ; PARTITION4
		122	;==========================================================
		123	; fat16/32 +-- fat16/32 +-- fat16/32 +-- fat16/32 +--
		124	; extended --+ extended --+ extended --+ extended --+
		125	; 0 0 0 0
		126	; 0 0 0 0
		127	; Notes:
		128	; - extended partition need to be in second entry on table
		129	; - it will skip over removed partitions
		130
		131	set_FAT32_variables:
		132	mov [problem_partition],0
		133	call reserve_hd1
321	diamond	134	call reserve_hd_channel
65	mario79	135
709	diamond	136	pushad
		137
65	mario79	138	cmp dword [hdpos],0
		139	je problem_hd
		140
		141	xor ecx,ecx ; partition count
		142	mov edx,-1 ; flag for partition
		143	xor eax,eax ; read MBR
		144	xor ebp,ebp ; extended partition start
		145
		146	new_partition:
		147	test ebp,ebp ; is there extended partition?
		148	jnz extended_already_set ; yes
		149	xchg ebp,eax ; no. set it now
		150
		151	extended_already_set:
		152	add eax,ebp ; mbr=mbr+0, ext_part=ext_start+relat_start
		153	mov ebx,buffer
		154	call hd_read
74	mario79	155	cmp [hd_error],0
		156	jne problem_hd
65	mario79	157
		158	cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
		159	jnz end_partition_chain
		160	cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition
578	mario79	161	; jz next_partition
		162	jnz .next_primary_partition
		163	cmp dword [ebx+0x1be+0xc+16],0
		164	jnz next_primary_partition
		165	cmp dword [ebx+0x1be+0xc+16+16],0
		166	jnz next_primary_partition_1
		167	cmp dword [ebx+0x1be+0xc+16+16+16],0
		168	jnz next_primary_partition_2
		169	jmp next_partition
		170
		171	.next_primary_partition:
65	mario79	172	push eax
		173	mov al,[ebx+0x1be+4] ; get primary partition type
		174	call scan_partition_types
		175	pop eax
		176	jnz next_primary_partition ; no. skip over
		177
		178	inc ecx
		179	cmp ecx,[fat32part] ; is it wanted partition?
		180	jnz next_primary_partition ; no
		181
256	diamond	182	mov edx, eax ; start sector
		183	add edx, [ebx+0x1be+8] ; add relative start
		184	push edx
		185	add edx, [ebx+0x1be+12] ; add length
		186	dec edx ; PARTITION_END is inclusive
		187	mov [PARTITION_END], edx ; note that this can be changed
		188	; when file system data will be available
		189	mov dl, [ebx+0x1be+4]
		190	mov [fs_type], dl ; save for FS recognizer (separate FAT vs NTFS)
		191	pop edx
		192
65	mario79	193	next_primary_partition:
		194	push eax
		195	mov al,[ebx+0x1be+4+16] ; get primary partition type
		196	call scan_partition_types
		197	pop eax
		198	jnz next_primary_partition_1 ; no. skip over
		199
		200	inc ecx
		201	cmp ecx,[fat32part] ; is it wanted partition?
		202	jnz next_primary_partition_1 ; no
		203
256	diamond	204	mov edx, eax
		205	add edx, [ebx+0x1be+8+16]
		206	push edx
		207	add edx, [ebx+0x1be+12+16]
		208	dec edx
		209	mov [PARTITION_END], edx
		210	mov dl, [ebx+0x1be+4+16]
		211	mov [fs_type], dl
		212	pop edx
65	mario79	213
		214	next_primary_partition_1:
		215	push eax
		216	mov al,[ebx+0x1be+4+16+16] ; get primary partition type
		217	call scan_partition_types
		218	pop eax
		219	jnz next_primary_partition_2 ; no. skip over
		220
		221	inc ecx
		222	cmp ecx,[fat32part] ; is it wanted partition?
		223	jnz next_primary_partition_2 ; no
		224
256	diamond	225	mov edx, eax
		226	add edx, [ebx+0x1be+8+16+16]
		227	push edx
		228	add edx, [ebx+0x1be+12+16+16]
		229	dec edx
		230	mov [PARTITION_END], edx
		231	mov dl, [ebx+0x1be+4+16+16]
		232	mov [fs_type], dl
		233	pop edx
65	mario79	234
		235	next_primary_partition_2:
		236	push eax
		237	mov al,[ebx+0x1be+4+16+16+16] ; get primary partition type
		238	call scan_partition_types
		239	pop eax
		240	jnz next_partition ; no. skip over
		241
		242	inc ecx
		243	cmp ecx,[fat32part] ; is it wanted partition?
		244	jnz next_partition ; no
		245
256	diamond	246	mov edx, eax
		247	add edx, [ebx+0x1be+8+16+16+16]
		248	push edx
		249	add edx, [ebx+0x1be+12+16+16+16]
		250	dec edx
		251	mov [PARTITION_END], edx
		252	mov dl, [ebx+0x1be+4+16+16+16]
		253	mov [fs_type], dl
		254	pop edx
65	mario79	255
		256	next_partition:
		257	push eax
		258	mov al,[ebx+0x1be+4] ; get extended partition type
		259	call scan_extended_types
		260	pop eax
		261	jnz next_partition_1
		262
		263	mov eax,[ebx+0x1be+8] ; add relative start
		264	test eax,eax ; is there extended partition?
		265	jnz new_partition ; yes. read it
		266
		267	next_partition_1:
		268	push eax
		269	mov al,[ebx+0x1be+4+16] ; get extended partition type
		270	call scan_extended_types
		271	pop eax
		272	jnz next_partition_2
		273
		274	mov eax,[ebx+0x1be+8+16] ; add relative start
		275	test eax,eax ; is there extended partition?
		276	jnz new_partition ; yes. read it
		277
		278	next_partition_2:
		279	push eax
		280	mov al,[ebx+0x1be+4+16+16] ; get extended partition type
		281	call scan_extended_types
		282	pop eax
		283	jnz next_partition_3
		284
		285	mov eax,[ebx+0x1be+8+16+16] ; add relative start
		286	test eax,eax ; is there extended partition?
		287	jnz new_partition ; yes. read it
		288
		289	next_partition_3:
		290	push eax
		291	mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type
		292	call scan_extended_types
		293	pop eax
		294	jnz end_partition_chain ; no. end chain
		295
		296	mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition
		297	test eax,eax ; is there extended partition?
		298	jnz new_partition ; yes. read it
		299
		300	end_partition_chain:
		301	mov [partition_count],ecx
		302
		303	cmp edx,-1 ; found wanted partition?
		304	jnz hd_and_partition_ok ; yes. install it
		305	jmp problem_partition_or_fat
		306
		307	scan_partition_types:
		308	push ecx
		309	mov edi,partition_types
		310	mov ecx,partition_types_end-partition_types
		311	cld
		312	repne scasb ; is partition type ok?
		313	pop ecx
		314	ret
		315
		316	scan_extended_types:
		317	push ecx
		318	mov edi,extended_types
		319	mov ecx,extended_types_end-extended_types
		320	cld
		321	repne scasb ; is it extended partition?
		322	pop ecx
		323	ret
		324
		325	problem_fat_dec_count: ; bootsector is missing or another problem
		326	dec [partition_count] ; remove it from partition_count
		327
		328	problem_partition_or_fat:
709	diamond	329	problem_hd:
65	mario79	330	popad
		331
256	diamond	332	mov [fs_type],0
321	diamond	333	call free_hd_channel
65	mario79	334	mov [hd1_status],0 ; free
		335	mov [problem_partition],1
		336	ret
		337
		338	hd_and_partition_ok:
		339	mov eax,edx
		340	mov [PARTITION_START],eax
256	diamond	341	mov edx, [PARTITION_END]
		342	sub edx, eax
		343	inc edx ; edx = length of partition
65	mario79	344
256	diamond	345	; mov [hd_setup],1
65	mario79	346	mov ebx,buffer
		347	call hd_read ; read boot sector of partition
256	diamond	348	cmp [hd_error], 0
		349	jz boot_read_ok
		350	cmp [fs_type], 7
		351	jnz problem_fat_dec_count
		352	; NTFS duplicates bootsector:
		353	; NT4/2k/XP+ saves bootsector copy in the end of disk
		354	; NT 3.51 saves bootsector copy in the middle of disk
		355	and [hd_error], 0
		356	mov eax, [PARTITION_END]
		357	call hd_read
		358	cmp [hd_error], 0
		359	jnz @f
		360	call ntfs_test_bootsec
		361	jnc boot_read_ok
		362	@@:
		363	and [hd_error], 0
		364	mov eax, edx
		365	shr eax, 1
		366	add eax, [PARTITION_START]
		367	call hd_read
		368	cmp [hd_error], 0
		369	jnz problem_fat_dec_count ; �� 졠...
		370	boot_read_ok:
		371	; mov [hd_setup], 0
		372	; if we are running on NTFS, check bootsector
709	diamond	373	; cmp [fs_type], 7
		374	; jz ntfs_setup
		375	call ntfs_test_bootsec
		376	jnc ntfs_setup
74	mario79	377
65	mario79	378	cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
		379	jnz problem_fat_dec_count
		380
		381	movzx eax,word [ebx+0xe] ; sectors reserved
		382	add eax,[PARTITION_START]
		383	mov [FAT_START],eax ; fat_start = partition_start + reserved
		384
		385	movzx eax,byte [ebx+0xd] ; sectors per cluster
		386	mov [SECTORS_PER_CLUSTER],eax
		387
		388	movzx ecx,word [ebx+0xb] ; bytes per sector
		389	mov [BYTES_PER_SECTOR],ecx
		390
		391	movzx eax,word [ebx+0x11] ; count of rootdir entries (=0 fat32)
		392	mov edx,32
		393	mul edx
		394	dec ecx
		395	add eax,ecx ; round up if not equal count
		396	inc ecx ; bytes per sector
		397	div ecx
		398	mov [ROOT_SECTORS],eax ; count of rootdir sectors
		399
		400	movzx eax,word [ebx+0x16] ; sectors per fat <65536
		401	test eax,eax
		402	jnz fat16_fatsize
		403	mov eax,[ebx+0x24] ; sectors per fat
		404	fat16_fatsize:
		405	mov [SECTORS_PER_FAT],eax
		406
		407	movzx eax,byte [ebx+0x10] ; number of fats
		408	test eax,eax ; if 0 it's not fat partition
		409	jz problem_fat_dec_count
		410	mov [NUMBER_OF_FATS],eax
		411	imul eax,[SECTORS_PER_FAT]
		412	add eax,[FAT_START]
		413	mov [ROOT_START],eax ; rootdir = fat_start + fat_size * fat_count
		414	add eax,[ROOT_SECTORS] ; rootdir sectors should be 0 on fat32
		415	mov [DATA_START],eax ; data area = rootdir + rootdir_size
		416
		417	movzx eax,word [ebx+0x13] ; total sector count <65536
		418	test eax,eax
		419	jnz fat16_total
		420	mov eax,[ebx+0x20] ; total sector count
		421	fat16_total:
		422	add eax,[PARTITION_START]
		423	dec eax
		424	mov [PARTITION_END],eax
		425	inc eax
		426	sub eax,[DATA_START] ; eax = count of data sectors
		427	xor edx,edx
		428	div dword [SECTORS_PER_CLUSTER]
		429	inc eax
		430	mov [LAST_CLUSTER],eax
		431	dec eax ; cluster count
649	diamond	432	mov [fatStartScan],2
65	mario79	433
		434	; limits by Microsoft Hardware White Paper v1.03
		435	cmp eax,4085 ; 0xff5
		436	jb problem_fat_dec_count ; fat12 not supported
		437	cmp eax,65525 ; 0xfff5
		438	jb fat16_partition
		439
		440	fat32_partition:
		441	mov eax,[ebx+0x2c] ; rootdir cluster
		442	mov [ROOT_CLUSTER],eax
		443	movzx eax,word [ebx+0x30] ; fs info sector
		444	add eax,[PARTITION_START]
		445	mov [ADR_FSINFO],eax
649	diamond	446	call hd_read
		447	mov eax,[ebx+0x1ec]
		448	cmp eax,-1
		449	jz @f
		450	mov [fatStartScan],eax
		451	@@:
65	mario79	452
		453	popad
		454
		455	mov [fatRESERVED],0x0FFFFFF6
		456	mov [fatBAD],0x0FFFFFF7
		457	mov [fatEND],0x0FFFFFF8
		458	mov [fatMASK],0x0FFFFFFF
256	diamond	459	mov [fs_type],32 ; Fat32
321	diamond	460	call free_hd_channel
65	mario79	461	mov [hd1_status],0 ; free
		462	ret
		463
		464	fat16_partition:
		465	xor eax,eax
		466	mov [ROOT_CLUSTER],eax
		467
		468	popad
		469
		470	mov [fatRESERVED],0x0000FFF6
		471	mov [fatBAD],0x0000FFF7
		472	mov [fatEND],0x0000FFF8
		473	mov [fatMASK],0x0000FFFF
256	diamond	474	mov [fs_type],16 ; Fat16
321	diamond	475	call free_hd_channel
65	mario79	476	mov [hd1_status],0 ; free
		477	ret

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(root)/kernel/trunk/fs/part_set.inc – Rev 709