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

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

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(root)/kernel/trunk/fs/part_set.inc @ 1379 – Rev 578