aabc2/KOS_qrcodes
1
0
Fork 0
forked from KolibriOS/kolibrios
Code Pull Requests Activity

support for PnP disks, part 4: move NTFS,EXT2,/hd*,/bd* to the new interface

Browse Source 
git-svn-id: svn://kolibrios.org@3742 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
CleverMouse
2013-07-01 16:29:16 +00:00
parent 05b437f60f
commit d59bc76c6d
18 changed files with 1655 additions and 3160 deletions
Download Patch File Download Diff File Expand all files Collapse all files

77
kernel/trunk/blkdev/disk.inc
View File

@@ -186,9 +186,9 @@ struct PARTITION
; Pointer to parent DISK structure.
FSUserFunctions dd ?
; Handlers for the sysfunction 70h. This field is a pointer to the following
; array. The first dword is a number of supported subfunctions, other dwords
; array. The first dword is pointer to disconnect handler.
; The first dword is a number of supported subfunctions, other dwords
; point to handlers of corresponding subfunctions.
; This field is 0 if file system is not recognized.
; ...fs-specific data may follow...
ends
@@ -501,7 +501,8 @@ disk_media_dereference:
jz .nofree
.freeloop:
lodsd
call free
mov ecx, [eax+PARTITION.FSUserFunctions]
call dword [ecx]
dec edi
jnz .freeloop
.nofree:
@@ -727,7 +728,7 @@ disk_scan_partitions:
; 10. This is not an MBR. The media is not partitioned. Create one partition
; which covers all the media and abort the loop.
stdcall disk_add_partition, 0, 0, \
dword [esi+DISK.MediaInfo.Capacity], dword [esi+DISK.MediaInfo.Capacity+4]
dword [esi+DISK.MediaInfo.Capacity], dword [esi+DISK.MediaInfo.Capacity+4], esi
jmp .done
.mbr:
; 11. Process all entries of the new MBR/EBR
@@ -855,7 +856,7 @@ irp type,\
adc edx, 0
push ecx
stdcall disk_add_partition, eax, edx, \
[ecx+PARTITION_TABLE_ENTRY.Length], 0
[ecx+PARTITION_TABLE_ENTRY.Length], 0, esi
pop ecx
.nothing:
; 5. Return.
@@ -869,7 +870,10 @@ irp type,\
; This is an internal function called from disk_scan_partitions and
; process_partition_table_entry. It adds one partition to the list of
; partitions for the media.
proc disk_add_partition stdcall uses ebx edi, start:qword, length:qword
; Important note: start, length, disk MUST be present and
; MUST be in the same order as in PARTITION structure.
; esi duplicates [disk].
proc disk_add_partition stdcall uses ebx edi, start:qword, length:qword, disk:dword
; 1. Check that this partition will not exceed the limit on total number.
cmp [esi+DISK.NumPartitions], MAX_NUM_PARTITIONS
jae .nothing
@@ -974,49 +978,64 @@ disk_detect_partition:
virtual at ebp+8
.start dq ?
.length dq ?
end virtual
; When disk_add_partition is called, ebx contains a pointer to
; a two-sectors-sized buffer. This function saves ebx in the stack
; immediately before ebp.
virtual at ebp-4
.buffer dd ?
.disk dd ?
end virtual
; 1. Read the bootsector to the buffer.
mov al, DISKFUNC.read
mov ebx, [.buffer]
add ebx, 512
push 1
stdcall disk_call_driver, ebx, dword [.start], dword [.start+4], esp
; When disk_add_partition is called, ebx contains a pointer to
; a three-sectors-sized buffer. This function saves ebx in the stack
; immediately before ebp.
mov ebx, [ebp-4] ; get buffer
add ebx, 512 ; advance over MBR data to bootsector data
add ebp, 8 ; ebp points to part of PARTITION structure
xor eax, eax ; first sector of the partition
call fs_read32_sys
push eax
; 2. Run tests for all supported filesystems. If at least one test succeeded,
; go to 4.
; For tests: qword [ebp+8] = partition start, qword [ebp+10h] = partition
; length, [esp] = 0 if reading bootsector failed or 1 if succeeded,
; ebx points to the buffer for bootsector.
; For tests:
; ebp -> first three fields of PARTITION structure, .start, .length, .disk;
; [esp] = error code after bootsector read: 0 = ok, otherwise = failed,
; ebx points to the buffer for bootsector,
; ebx+512 points to 512-bytes buffer that can be used for anything.
call fat_create_partition
test eax, eax
jnz .success
call ntfs_create_partition
test eax, eax
jnz .success
call ext2_create_partition
test eax, eax
jnz .success
; 3. No file system has recognized the volume, so just allocate the PARTITION
; structure without extra fields.
movi eax, sizeof.PARTITION
call malloc
test eax, eax
jz .nothing
mov edx, dword [.start]
mov edx, dword [ebp+PARTITION.FirstSector]
mov dword [eax+PARTITION.FirstSector], edx
mov edx, dword [.start+4]
mov edx, dword [ebp+PARTITION.FirstSector+4]
mov dword [eax+PARTITION.FirstSector+4], edx
mov edx, dword [.length]
mov edx, dword [ebp+PARTITION.Length]
mov dword [eax+PARTITION.Length], edx
mov edx, dword [.length+4]
mov edx, dword [ebp+PARTITION.Length+4]
mov dword [eax+PARTITION.Length+4], edx
mov [eax+PARTITION.Disk], esi
and [eax+PARTITION.FSUserFunctions], 0
mov [eax+PARTITION.FSUserFunctions], default_fs_functions
.success:
.nothing:
sub ebp, 8 ; restore ebp
; 4. Return with eax = pointer to PARTITION or NULL.
pop ecx
ret
iglobal
align 4
default_fs_functions:
dd free
dd 0 ; no user functions
endg
; This function is called from file_system_lfn.
; This handler gets the control each time when fn 70 is called
; with unknown item of root subdirectory.
@@ -1200,15 +1219,13 @@ fs_dyndisk:
mov eax, [edx+DISK.Partitions]
mov eax, [eax+ecx*4]
mov edi, [eax+PARTITION.FSUserFunctions]
test edi, edi
jz .nofs
mov ecx, [ebx]
cmp [edi], ecx
cmp [edi+4], ecx
jbe .unsupported
push edx
push ebp
mov ebp, eax
call dword [edi+4+ecx*4]
call dword [edi+8+ecx*4]
pop ebp
pop edx
mov dword [esp+32], eax
@@ -1225,6 +1242,8 @@ fs_dyndisk:
mov dword [esp+32], ERROR_FILE_NOT_FOUND
jmp .cleanup
.unsupported:
cmp edi, default_fs_functions
jz .nofs
mov dword [esp+32], ERROR_UNSUPPORTED_FS
jmp .cleanup
.nomedia: