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kernel: Implement sf70.5 for default FS stub

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Only get partition size, not its label.

Information of a block device and FS on it should be reported by
different system calls.

git-svn-id: svn://kolibrios.org@9043 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Ivan Baravy 2021-07-09 03:20:12 +00:00
parent 27b702612e
commit 6beb99fc30
1 changed files with 42 additions and 1 deletions
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43
kernel/trunk/blkdev/disk.inc
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@ -1288,9 +1288,48 @@ iglobal
align 4
default_fs_functions:
dd free
dd 0 ; no user functions
dd (default_fs_functions_end - default_fs_functions - 4) / 4
dd 0
dd 0
dd 0
dd 0
dd 0
dd default_fs_get_file_info
default_fs_functions_end:
endg
proc default_fs_get_file_info uses edi
movi eax, ERROR_UNSUPPORTED_FS
cmp byte[esi], 0
jnz .done
movi ecx, 40 ; len of BDFE without filename
cmp [ebx+f70s5arg.xflags], 0
jz @f
add ecx, 2 ; volume label requested, space for utf16 terminator
@@:
mov ebx, [ebx+f70s5arg.buf]
stdcall is_region_userspace, ebx, ecx
movi eax, ERROR_MEMORY_POINTER
jz .done
mov edi, ebx
xor eax, eax
rep stosb
mov [ebx+bdfe.attr], 0x10 ; directory flag
mov word[ebx+bdfe.name], 0 ; word because of possible utf16
mov eax, dword[ebp+PARTITION.Length+DQ.lo]
mov edx, dword[ebp+PARTITION.Length+DQ.hi]
mov ecx, [ebp+PARTITION.Disk]
mov ecx, [ecx+DISK.MediaInfo.SectorSize]
bsf ecx, ecx
shld edx, eax, cl
shl eax, cl
mov [ebx+bdfe.size.lo], eax
mov [ebx+bdfe.size.hi], edx
xor eax, eax
.done:
ret
endp
; 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.
@ -1476,6 +1515,8 @@ dyndisk_handler:
mov ecx, [ebx]
cmp [edi+4], ecx
jbe .unsupported
cmp dword[edi+8+ecx*4], 0 ; user function not implemented
jz .unsupported
pushd edx ebp eax [edi+8+ecx*4]
cmp ecx, 10
jnz .callFS