ext fs optimizing
git-svn-id: svn://kolibrios.org@6756 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
pathoswithin
parent
cca1343075
commit
69d1122a04
@ -305,87 +305,117 @@ extfsReadBlock:
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extfsReadDescriptor:
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; in: eax = block group number
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; out:
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; [ebp+EXTFS.tempBlockBuffer] -> relevant block
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; eax -> block group descriptor, 0 = error
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push edx ebx
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; out: ebx -> block group descriptor
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push ecx edx
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mov edx, [ebp+EXTFS.superblock.firstGroupBlock]
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inc edx
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mov ecx, [ebp+EXTFS.sectorsPerBlockLog]
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shl edx, cl
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shl eax, 5
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xor edx, edx
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div [ebp+EXTFS.bytesPerBlock]
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add eax, [ebp+EXTFS.superblock.firstGroupBlock]
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inc eax
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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call extfsReadBlock
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jc .fail
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mov eax, ebx
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mov ecx, eax
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and ecx, 511
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shr eax, 9
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add eax, edx
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@@:
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pop ebx edx
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ret
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.fail:
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xor eax, eax
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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push ecx
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call fs_read32_sys
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pop ecx
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add ebx, ecx
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test eax, eax
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jz @f
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movi eax, ERROR_DEVICE
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stc
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jmp @b
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@@:
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pop edx ecx
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ret
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extfsWriteDescriptor:
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; in:
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; eax = block group number
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; [ebp+EXTFS.tempBlockBuffer] -> relevant block
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push edx ebx
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shl eax, 5
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xor edx, edx
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div [ebp+EXTFS.bytesPerBlock]
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add eax, [ebp+EXTFS.superblock.firstGroupBlock]
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inc eax
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; in: eax = block group number
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push ebx ecx edx
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mov edx, [ebp+EXTFS.superblock.firstGroupBlock]
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inc edx
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mov ecx, [ebp+EXTFS.sectorsPerBlockLog]
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shl edx, cl
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shr eax, 9-5
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add eax, edx
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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call extfsWriteBlock
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pop ebx edx
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call fs_write32_sys
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pop edx ecx ebx
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ret
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extfsResourceFree:
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; in:
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; ecx=0 -> block, ecx=1 -> inode
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; eax = block/inode number
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push ebx edx
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extfsExtentFree:
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; in: eax = first block number, ecx = extent size
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push ebx edx edi
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sub eax, [ebp+EXTFS.superblock.firstGroupBlock]
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xor edx, edx
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div [ebp+EXTFS.superblock.blocksPerGroup]
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mov ebx, [ebp+EXTFS.superblock.blocksPerGroup]
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div ebx
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sub ebx, edx
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sub ebx, ecx
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jc .ret
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push edx eax
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call extfsReadDescriptor
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jc .fail2
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inc [eax+BGDESCR.blocksFree+ecx*2]
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mov edx, [eax+BGDESCR.blockBitmap+ecx*4]
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add [ebx+BGDESCR.blocksFree], cx
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mov edx, [ebx+BGDESCR.blockBitmap]
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pop eax
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call extfsWriteDescriptor
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jc .fail
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mov eax, edx
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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call extfsReadBlock
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jc .fail
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pop eax
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push edx
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mov edx, eax
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and edx, 31
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shr eax, 5
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shl eax, 2
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add eax, [ebp+EXTFS.tempBlockBuffer]
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btr [eax], edx
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pop eax
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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call extfsWriteBlock
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jc @f
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inc [ebp+EXTFS.superblock.blocksFree+ecx*4]
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push ecx ebx edx
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add [ebp+EXTFS.superblock.blocksFree], ecx
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mov edi, eax
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shr edi, 5
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shl edi, 2
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add edi, ebx
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and eax, 31
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mov edx, ecx
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mov ecx, 32
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sub ecx, eax
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sub edx, ecx
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jnc @f
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add ecx, edx
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xor edx, edx
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@@:
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or ebx, -1
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shl ebx, cl
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not ebx
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mov ecx, eax
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shl ebx, cl
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not ebx
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and [edi], ebx
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mov ecx, edx
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jecxz @f
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shr ecx, 5
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add edi, 4
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xor eax, eax
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rep stosd
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and edx, 31
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mov ecx, edx
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jecxz @f
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not eax
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shl eax, cl
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and [edi], eax
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@@:
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pop eax ebx
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call extfsWriteBlock
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pop ecx
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mov eax, ecx
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mul [ebp+EXTFS.sectorsPerBlock]
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sub [ebp+EXTFS.inodeBuffer.sectorsUsed], eax
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.ret:
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pop edi edx ebx
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xor eax, eax
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pop edx ebx
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ret
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.fail2:
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pop eax
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.fail:
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pop eax
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jmp @b
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jmp .ret
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extfsInodeAlloc:
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; in: eax = parent inode number
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@ -399,12 +429,11 @@ extfsInodeAlloc:
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.test_block_group:
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call extfsReadDescriptor
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jc .fail
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dec [eax+BGDESCR.inodesFree]
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dec [ebx+BGDESCR.inodesFree]
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js .next
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mov edx, [eax+BGDESCR.inodeBitmap]
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mov edx, [ebx+BGDESCR.inodeBitmap]
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mov eax, [esp]
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call extfsWriteDescriptor
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jc .fail
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mov eax, edx
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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mov edi, ebx
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@ -426,23 +455,15 @@ extfsInodeAlloc:
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mov ecx, eax
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mov eax, edx
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call extfsWriteBlock
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jc .fail
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pop eax
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mul [ebp+EXTFS.superblock.inodesPerGroup]
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add eax, ecx
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dec [ebp+EXTFS.superblock.inodesFree]
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mov ebx, eax
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pop eax
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lea ebx, [eax+ecx+1]
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xor eax, eax
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@@:
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pop edi esi edx ecx
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.ret:
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pop edi edi esi edx ecx
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ret
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.fail:
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pop eax eax
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movi eax, ERROR_DEVICE
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jmp @b
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.next:
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jmp esi
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@ -461,17 +482,16 @@ extfsInodeAlloc:
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mov esi, .backward
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.backward:
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sub dword[esp], 1
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jc .fail
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mov eax, [esp]
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jmp .test_block_group
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jnc .test_block_group
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movi eax, ERROR_DISK_FULL
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.fail:
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pop edi
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jmp .ret
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extfsExtentAlloc:
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; in:
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; eax = parent inode number
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; ecx = blocks max
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; out:
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; ebx = first block number
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; ecx = blocks allocated
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; in: eax = parent inode number, ecx = blocks max
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; out: ebx = first block number, ecx = blocks allocated
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push edx esi edi ecx
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dec eax
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xor edx, edx
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@ -480,9 +500,9 @@ extfsExtentAlloc:
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.test_block_group:
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call extfsReadDescriptor
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jc .fail
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dec [eax+BGDESCR.blocksFree]
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dec [ebx+BGDESCR.blocksFree]
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js .next
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mov eax, [eax+BGDESCR.blockBitmap]
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mov eax, [ebx+BGDESCR.blockBitmap]
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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mov edx, eax
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mov edi, ebx
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@ -502,8 +522,10 @@ extfsExtentAlloc:
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not eax
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shr eax, cl
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shl eax, cl
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mov ebx, 32
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bsf ebx, eax
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jnz @f
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mov ebx, 32
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@@:
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sub ebx, ecx
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mov eax, [esp+16]
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cmp ebx, eax
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@ -574,33 +596,29 @@ extfsExtentAlloc:
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pop eax
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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call extfsWriteBlock
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jc .fail
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mov eax, [esp]
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call extfsReadDescriptor
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jc .fail
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mov ecx, [esp+8]
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sub [eax+BGDESCR.blocksFree], cx
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sub [ebx+BGDESCR.blocksFree], cx
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jc .fail
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sub [ebp+EXTFS.superblock.blocksFree], ecx
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mov eax, [esp]
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call extfsWriteDescriptor
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jc .fail
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pop eax ebx
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mul [ebp+EXTFS.superblock.blocksPerGroup]
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mov ebx, eax
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add ebx, esi
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xor eax, eax
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add ebx, [ebp+EXTFS.superblock.firstGroupBlock]
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pop ecx
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mov eax, ecx
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mul [ebp+EXTFS.sectorsPerBlock]
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add [ebp+EXTFS.inodeBuffer.sectorsUsed], eax
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xor eax, eax
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.ret:
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pop edi esi edx
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ret
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.fail:
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pop eax eax
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movi eax, ERROR_DEVICE
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xor ecx, ecx
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jmp .ret
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.next: ; search forward, then backward
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pop eax
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cmp eax, [esp]
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@ -620,9 +638,11 @@ extfsExtentAlloc:
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dec eax
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push eax
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jns .test_block_group
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pop eax eax
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movi eax, ERROR_DISK_FULL
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.fail:
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add esp, 12
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xor ecx, ecx
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stc
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jmp .ret
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extfsGetExtent:
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@ -753,6 +773,8 @@ extfsGetExtent:
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.calculateExtent:
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lea esi, [ebx+edx*4]
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lodsd
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test eax, eax
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jz .noBlock
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mov ebx, eax
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sub ecx, edx
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xor edx, edx
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@ -773,30 +795,21 @@ extfsGetExtent:
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getInodeLocation:
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; in: eax = inode number
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; out: ebx = inode sector, edx = offset in sector
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; out: eax = inode sector, edx = offset in sector
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dec eax
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xor edx, edx
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div [ebp+EXTFS.superblock.inodesPerGroup]
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mov ecx, edx
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shl eax, 5
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xor edx, edx
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div [ebp+EXTFS.bytesPerBlock]
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add eax, [ebp+EXTFS.superblock.firstGroupBlock]
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inc eax
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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call extfsReadBlock
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call extfsReadDescriptor
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jc @f
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add ebx, edx
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mov ebx, [ebx+BGDESCR.inodeTable]
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mov eax, ecx
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mov ecx, [ebp+EXTFS.sectorsPerBlockLog]
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shl ebx, cl
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mov eax, edx
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mul [ebp+EXTFS.superblock.inodeSize]
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mov edx, eax
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shr eax, 9
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and edx, 511
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add ebx, eax
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xor eax, eax
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add eax, ebx
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@@:
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ret
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@ -810,7 +823,6 @@ writeInode:
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pop eax
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call getInodeLocation
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jc .ret
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mov eax, ebx
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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mov ecx, eax
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call fs_read32_sys
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@ -838,7 +850,6 @@ readInode:
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mov edi, ebx
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call getInodeLocation
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jc @f
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mov eax, ebx
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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call fs_read32_sys
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test eax, eax
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@ -1002,9 +1013,6 @@ doublyIndirectBlockAlloc:
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call extfsExtentAlloc
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jc .end
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sub [esp+12], ecx
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mov eax, ecx
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imul eax, [ebp+EXTFS.sectorsPerBlock]
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add [ebp+EXTFS.inodeBuffer.sectorsUsed], eax
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jmp @b
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extfsExtendFile:
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@ -1040,9 +1048,6 @@ extfsExtendFile:
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call extfsExtentAlloc
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jc .errDone
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sub [esp], ecx
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mov eax, ecx
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imul eax, [ebp+EXTFS.sectorsPerBlock]
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add [esi+INODE.sectorsUsed], eax
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cmp edx, 12
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jc .directBlocks
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sub edx, 12
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@ -1168,9 +1173,6 @@ extfsExtendFile:
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call extfsExtentAlloc
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jc .errSave
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sub [esp], ecx
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mov eax, ecx
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imul eax, [ebp+EXTFS.sectorsPerBlock]
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add [ebp+EXTFS.inodeBuffer.sectorsUsed], eax
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jmp @b
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@@:
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@ -1206,26 +1208,40 @@ freeIndirectBlock:
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lea edi, [ebx+edx*4]
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neg edx
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add edx, [ebp+EXTFS.dwordsPerBlock]
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.freeExtent:
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mov ebx, [edi]
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test ebx, ebx
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jz .end
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xor eax, eax
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xor ecx, ecx
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@@:
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mov eax, [edi]
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test eax, eax
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jz .end
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call extfsResourceFree
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stosd
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inc ecx
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dec edx
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jnz @b
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jz @f
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mov eax, [edi]
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sub eax, ebx
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sub eax, ecx
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jz @b
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@@:
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mov eax, ebx
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call extfsExtentFree
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test edx, edx
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jnz .freeExtent
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dec dword[esp+8]
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.end:
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pop edx edi
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mov eax, [edi]
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test edx, edx
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jnz @f
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call extfsResourceFree
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xor ecx, ecx
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inc ecx
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call extfsExtentFree
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stosd
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jmp .done
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@@:
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mov ebx, [ebp+EXTFS.mainBlockBuffer]
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call extfsWriteBlock
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add edi, 4
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.done:
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@ -1270,7 +1286,8 @@ freeDoublyIndirectBlock:
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test edx, edx
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jnz @f
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xor ecx, ecx
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call extfsResourceFree
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inc ecx
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call extfsExtentFree
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stosd
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jmp .done
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@ -1291,9 +1308,7 @@ freeDoublyIndirectBlock:
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ret
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extfsTruncateFile:
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; in:
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; [ebp+EXTFS.inodeBuffer] = inode
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; ecx = new size
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; in: ecx = new size, [ebp+EXTFS.inodeBuffer] = inode
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push ebx ecx edx esi edi
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lea esi, [ebp+EXTFS.inodeBuffer]
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cmp ecx, [esi+INODE.fileSize]
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@ -1322,11 +1337,12 @@ extfsTruncateFile:
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neg edx
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add edx, 12
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xor ecx, ecx
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inc ecx
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@@:
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mov eax, [edi]
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test eax, eax
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jz .ret
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call extfsResourceFree
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call extfsExtentFree
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stosd
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dec edx
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jnz @b
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@ -1368,7 +1384,8 @@ extfsTruncateFile:
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test edx, edx
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jnz @f
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xor ecx, ecx
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call extfsResourceFree
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inc ecx
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call extfsExtentFree
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mov [esi+INODE.tripleAddress], eax
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jmp .done
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@ -1462,7 +1479,6 @@ linkInode:
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pop eax
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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call extfsWriteBlock
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jc .error_get_inode_block
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pop ecx
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inc ecx
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cmp ecx, [esp]
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@ -1502,7 +1518,6 @@ linkInode:
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mov eax, edx
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mov ebx, [ebp+EXTFS.tempBlockBuffer]
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call extfsWriteBlock
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jc .error_block_write
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mov eax, [esp]
|
||||
lea ebx, [ebp+EXTFS.inodeBuffer]
|
||||
call readInode
|
||||
@ -1527,11 +1542,8 @@ linkInode:
|
||||
jmp @b
|
||||
|
||||
unlinkInode:
|
||||
; in:
|
||||
; eax = inode from which to unlink
|
||||
; ebx = inode to unlink
|
||||
; out:
|
||||
; eax = current number of links to inode, -1 = error
|
||||
; in: eax = inode from which to unlink, ebx = inode to unlink
|
||||
; out: eax = current number of links to inode, -1 = error
|
||||
push edx ebx
|
||||
lea ebx, [ebp+EXTFS.inodeBuffer]
|
||||
call readInode
|
||||
@ -1593,7 +1605,6 @@ unlinkInode:
|
||||
mov eax, edi
|
||||
mov ebx, [ebp+EXTFS.tempBlockBuffer]
|
||||
call extfsWriteBlock
|
||||
jc .fail
|
||||
mov eax, [esp]
|
||||
lea ebx, [ebp+EXTFS.inodeBuffer]
|
||||
call readInode
|
||||
@ -1624,7 +1635,7 @@ findInode:
|
||||
pop esi
|
||||
pushd 0 ROOT_INODE
|
||||
mov edi, esi
|
||||
cmp [edx+INODE.sectorsUsed], 0
|
||||
cmp [edx+INODE.fileSize], 0
|
||||
jz .not_found
|
||||
cmp byte [esi], 0
|
||||
jnz .next_path_part
|
||||
@ -1641,7 +1652,7 @@ findInode:
|
||||
ret
|
||||
|
||||
.next_path_part:
|
||||
push [edx+INODE.sectorsUsed]
|
||||
push [edx+INODE.fileSize]
|
||||
xor ecx, ecx
|
||||
.folder_block_cycle:
|
||||
push ecx
|
||||
@ -1682,7 +1693,7 @@ findInode:
|
||||
; ebx -> matched directory entry, esi -> name without parent, or not changed
|
||||
cmp edi, esi
|
||||
jnz @f
|
||||
sub eax, [ebp+EXTFS.sectorsPerBlock]
|
||||
sub eax, [ebp+EXTFS.bytesPerBlock]
|
||||
jle .not_found
|
||||
push eax
|
||||
inc ecx
|
||||
@ -2193,6 +2204,13 @@ ext_Delete:
|
||||
inc ecx
|
||||
jmp .checkDirectory
|
||||
|
||||
.not_empty:
|
||||
pop eax eax
|
||||
.error_stack8:
|
||||
pop eax eax
|
||||
push ERROR_ACCESS_DENIED
|
||||
jmp .ret
|
||||
|
||||
.empty:
|
||||
cmp eax, ERROR_END_OF_FILE
|
||||
jnz .not_empty_eax
|
||||
@ -2231,24 +2249,36 @@ ext_Delete:
|
||||
mov ebx, edi
|
||||
call writeInode
|
||||
jc .error_stack4_eax
|
||||
cmp edx, DIRECTORY
|
||||
jne @f
|
||||
mov eax, [esp]
|
||||
pop eax
|
||||
dec eax
|
||||
mov ecx, edx
|
||||
xor edx, edx
|
||||
div [ebp+EXTFS.superblock.inodesPerGroup]
|
||||
push eax
|
||||
push edx eax
|
||||
call extfsReadDescriptor
|
||||
jc .error_stack8
|
||||
dec [eax+BGDESCR.directoriesCount]
|
||||
jc .error_stack8_eax
|
||||
cmp ecx, DIRECTORY
|
||||
jnz @f
|
||||
dec [ebx+BGDESCR.directoriesCount]
|
||||
@@:
|
||||
inc [ebx+BGDESCR.inodesFree]
|
||||
mov ecx, [ebx+BGDESCR.inodeBitmap]
|
||||
pop eax
|
||||
call extfsWriteDescriptor
|
||||
@@: ; free inode
|
||||
mov eax, ecx
|
||||
mov ebx, [ebp+EXTFS.tempBlockBuffer]
|
||||
call extfsReadBlock
|
||||
jc .error_stack4_eax
|
||||
pop eax
|
||||
dec eax
|
||||
xor ecx, ecx
|
||||
inc ecx
|
||||
call extfsResourceFree
|
||||
mov edx, eax
|
||||
and edx, 31
|
||||
shr eax, 5
|
||||
shl eax, 2
|
||||
add eax, ebx
|
||||
btr [eax], edx
|
||||
mov eax, ecx
|
||||
call extfsWriteBlock
|
||||
inc [ebp+EXTFS.superblock.inodesFree]
|
||||
push eax
|
||||
.disk_sync:
|
||||
call writeSuperblock
|
||||
@ -2260,15 +2290,10 @@ ext_Delete:
|
||||
pop eax
|
||||
ret
|
||||
|
||||
.not_empty:
|
||||
pop eax eax
|
||||
.error_stack8:
|
||||
pop eax eax
|
||||
push ERROR_ACCESS_DENIED
|
||||
jmp .disk_sync
|
||||
|
||||
.not_empty_eax:
|
||||
add esp, 12
|
||||
pop ebx ebx
|
||||
.error_stack8_eax:
|
||||
pop ebx
|
||||
.error_stack4_eax:
|
||||
pop ebx
|
||||
push eax
|
||||
@ -2284,7 +2309,6 @@ ext_CreateFolder:
|
||||
mov eax, esi
|
||||
call extfsInodeAlloc
|
||||
jc .error
|
||||
inc ebx
|
||||
push ebx esi edi
|
||||
xor al, al
|
||||
lea edi, [ebp+EXTFS.inodeBuffer]
|
||||
@ -2333,8 +2357,8 @@ ext_CreateFolder:
|
||||
div [ebp+EXTFS.superblock.inodesPerGroup]
|
||||
mov edx, eax
|
||||
call extfsReadDescriptor
|
||||
jc @f
|
||||
inc [eax+BGDESCR.directoriesCount]
|
||||
jc .error
|
||||
inc [ebx+BGDESCR.directoriesCount]
|
||||
mov eax, edx
|
||||
call extfsWriteDescriptor
|
||||
.success:
|
||||
@ -2347,10 +2371,6 @@ ext_CreateFolder:
|
||||
pop eax
|
||||
ret
|
||||
|
||||
@@:
|
||||
movi eax, ERROR_DEVICE
|
||||
jmp .error
|
||||
|
||||
self_link db ".", 0
|
||||
parent_link db "..", 0
|
||||
|
||||
@ -2365,7 +2385,6 @@ ext_CreateFile:
|
||||
mov eax, esi
|
||||
call extfsInodeAlloc
|
||||
jc .error
|
||||
inc ebx
|
||||
push ebx ebx esi edi
|
||||
xor al, al
|
||||
lea edi, [ebp+EXTFS.inodeBuffer]
|
||||
|
||||
Loading…
Reference in New Issue
Block a user