kernel/device_manager/IORequest.cpp

383 		// We iterate through the vecs we have read, moving offset (the device
384 		// offset) as we go. If [offset, offset + vec.length) intersects with
386 		off_t offset = fOffset;
395 			if (offset < startOffset) {
396 				// If the complete vector is before the start offset, skip it.
397 				if (offset + (off_t)length <= startOffset) {
398 					offset += length;
402 				// The vector starts before the start offset, but intersects
404 				generic_size_t diff = startOffset - offset;
405 				offset += diff;
410 			if (offset + (off_t)length > endOffset) {
411 				// If we're already beyond the end offset, we're done.
412 				if (offset >= endOffset)
415 				// The vector extends beyond the end offset -- cut it.
416 				length = endOffset - offset;
421 					bounceBuffer + (base - bounceBufferStart), offset, length);
424 			offset += length;
465 			off_t offset = fOffset;
481 				offset += fBlockSize;
505 					if (offset + (off_t)length > endOffset)
506 						length = endOffset - offset;
507 					status_t error = fParent->CopyData(offset,
513 				offset += length;
535 IOOperation::SetOriginalRange(off_t offset, generic_size_t length)
537 	fOriginalOffset = fOffset = offset;
543 IOOperation::SetRange(off_t offset, generic_size_t length)
545 	fOffset = offset;
707 	kprintf("  offset:           %-8" B_PRIdOFF " (original: %" B_PRIdOFF ")\n",
764 IORequest::Init(off_t offset, generic_addr_t buffer, generic_size_t length,
767 	ASSERT(offset >= 0);
772 	return Init(offset, &vec, 1, length, write, flags);
777 IORequest::Init(off_t offset, generic_size_t firstVecOffset,
781 	ASSERT(offset >= 0);
790 	fOffset = offset;
816 IORequest::CreateSubRequest(off_t parentOffset, off_t offset,
853 	status_t error = subRequest->Init(offset, vecOffset, remainingLength,
1197 IORequest::CopyData(off_t offset, void* buffer, size_t size)
1199 	return _CopyData(buffer, offset, size, true);
1204 IORequest::CopyData(const void* buffer, off_t offset, size_t size)
1206 	return _CopyData((void*)buffer, offset, size, false);
1211 IORequest::ClearData(off_t offset, generic_size_t size)
1216 	if (offset < fOffset || offset + (off_t)size > fOffset + (off_t)fLength) {
1218 			", %" B_PRIuGENADDR ")", offset, size);
1234 	generic_size_t skipBytes = offset - fOffset;
1265 IORequest::_CopyData(void* _buffer, off_t offset, size_t size, bool copyIn)
1272 	if (offset < fOffset || offset + (off_t)size > fOffset + (off_t)fLength) {
1274 			offset, size);
1290 	generic_size_t skipBytes = offset - fOffset;
1453 	kprintf("  offset:            %" B_PRIdOFF "\n", fOffset);
1456 	kprintf("  relative offset:   %" B_PRIuGENADDR "\n", fRelativeParentOffset);
1466 	kprintf("    vec offset:      %" B_PRIuGENADDR "\n", fVecOffset);