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[NTFS] - Refactor to allow the copy of the attribute stored in NTFS_ATTR_CONTEXT to have a dynamic length; change Record member from an NTFS_ATTR_RECORD to a PNTFS_ATTR_RECORD. Rename it pRecord to reinforce the change. Fix some bugs related to the record size changing.

Browse source 
-PrepareAttributeContext() - update to allocate memory for pRecord. Don't assume allocations are succeeding.
-ReleaseAttributeContext() - update to free memory for pRecord.
-InternalSetResidentAttributeLength() - Increase size of AttrContext->pRecord as needed. Update to return an NTSTATUS.
-SetResidentAttributeDataLength() - Fix bug that could occur when migrating resident attributes to non-resident if AttrContext->pRecord is too small for the new attribute.
-AddRun() - Fix a bug by reallocating AttrContext->pRecord if the record needs to be enlarged.

svn path=/branches/GSoC_2016/NTFS/; revision=75493
This commit is contained in:
Trevor Thompson 2017-08-06 02:54:15 +00:00 • committed by Thomas Faber
parent f2e47474f0
commit 4dfcd1d582
10 changed files with 216 additions and 120 deletions
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8
drivers/filesystems/ntfs/rw.c
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@ -126,7 +126,7 @@ NtfsReadFile(PDEVICE_EXTENSION DeviceExt,
return Status;
}
StreamSize = AttributeDataLength(&DataContext->Record);
StreamSize = AttributeDataLength(DataContext->pRecord);
if (ReadOffset >= StreamSize)
{
DPRINT1("Reading beyond stream end!\n");
@ -149,7 +149,7 @@ NtfsReadFile(PDEVICE_EXTENSION DeviceExt,
/* do we need to extend RealLength by one sector? */
if (RealLength + RealReadOffset < ReadOffset + Length)
{
if (RealReadOffset + RealLength + DeviceExt->NtfsInfo.BytesPerSector <= AttributeAllocatedLength(&DataContext->Record))
if (RealReadOffset + RealLength + DeviceExt->NtfsInfo.BytesPerSector <= AttributeAllocatedLength(DataContext->pRecord))
RealLength += DeviceExt->NtfsInfo.BytesPerSector;
}
@ -413,7 +413,7 @@ NTSTATUS NtfsWriteFile(PDEVICE_EXTENSION DeviceExt,
}
// Get the size of the stream on disk
StreamSize = AttributeDataLength(&DataContext->Record);
StreamSize = AttributeDataLength(DataContext->pRecord);
DPRINT("WriteOffset: %lu\tStreamSize: %I64u\n", WriteOffset, StreamSize);
@ -442,7 +442,7 @@ NTSTATUS NtfsWriteFile(PDEVICE_EXTENSION DeviceExt,
return Status;
}
AllocationSize = AttributeAllocatedLength(&DataContext->Record);
AllocationSize = AttributeAllocatedLength(DataContext->pRecord);
// now we need to update this file's size in every directory index entry that references it
// TODO: put this code in its own function and adapt it to work with every filename / hardlink