Rename blockSize to chunkSize to avoid confusion with physical blocks.
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d9ceb50238
commit
27b85117c4
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@ -156,19 +156,19 @@ bool ExternalCommandHelper::CreateFile(const QString &filePath, const QByteArray
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}
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}
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// If targetDevice is empty then return QByteArray with data that was read from disk.
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// If targetDevice is empty then return QByteArray with data that was read from disk.
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QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, const qint64 sourceOffset, const qint64 sourceLength, const QString& targetDevice, const qint64 targetOffset, const qint64 blockSize)
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QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, const qint64 sourceOffset, const qint64 sourceLength, const QString& targetDevice, const qint64 targetOffset, const qint64 chunkSize)
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{
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{
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if (!isCallerAuthorized()) {
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if (!isCallerAuthorized()) {
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return {};
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return {};
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}
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}
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// Avoid division by zero further down
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// Avoid division by zero further down
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if (!blockSize) {
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if (!chunkSize) {
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return {};
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return {};
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}
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}
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// Prevent some out of memory situations
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// Prevent some out of memory situations
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if (blockSize > 100 * MiB) {
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if (chunkSize > 100 * MiB) {
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return {};
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return {};
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}
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}
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@ -187,13 +187,13 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
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QVariantMap reply;
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QVariantMap reply;
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reply[QStringLiteral("success")] = true;
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reply[QStringLiteral("success")] = true;
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// This enum specified whether individual blocks are moved left or right
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// This enum specified whether individual data chunks are moved left or right
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// When source and target devices are the same we have to be careful not to overwrite
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// When source and target devices are the same we have to be careful not to overwrite
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// source data with newly written data. We don't have to do this if sourceDevice is not
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// source data with newly written data. We don't have to do this if sourceDevice is not
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// targetDevice but there are no disadvantages in applying the same scheme.
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// targetDevice but there are no disadvantages in applying the same scheme.
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// When partition is moved to the left, we start with the leftmost block,
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// When partition is moved to the left, we start with the leftmost chunk,
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// and move it further left, then second leftmost block and so on.
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// and move it further left, then second leftmost chunk and so on.
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// But when we move partition to the right, we start with rightmost block.
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// But when we move partition to the right, we start with rightmost chunk.
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// To account for this difference, we introduce CopyDirection variable which takes
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// To account for this difference, we introduce CopyDirection variable which takes
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// care of some of the differences in offset calculation between these two cases.
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// care of some of the differences in offset calculation between these two cases.
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enum CopyDirection : qint8 {
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enum CopyDirection : qint8 {
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@ -202,26 +202,26 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
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};
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};
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qint8 copyDirection = targetOffset > sourceOffset ? CopyDirection::Right : CopyDirection::Left;
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qint8 copyDirection = targetOffset > sourceOffset ? CopyDirection::Right : CopyDirection::Left;
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// Let readOffset (r) and writeOffset (w) be the offsets of the first block that we move.
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// Let readOffset (r) and writeOffset (w) be the offsets of the first chunk that we move.
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// When we move data to the left:
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// When we move data to the left:
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// ______target______ ______source______
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// ______target______ ______source______
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// r <- w=================
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// r <- w=================
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qint64 readOffset = sourceOffset;
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qint64 readOffset = sourceOffset;
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qint64 writeOffset = targetOffset;
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qint64 writeOffset = targetOffset;
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// When we move data to the right, we start moving data from the last block
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// When we move data to the right, we start moving data from the last chunk
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// ______source______ ______target______
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// ______source______ ______target______
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// =================r -> w
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// =================r -> w
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if (copyDirection == CopyDirection::Right) {
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if (copyDirection == CopyDirection::Right) {
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readOffset = sourceOffset + sourceLength - blockSize;
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readOffset = sourceOffset + sourceLength - chunkSize;
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writeOffset = targetOffset + sourceLength - blockSize;
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writeOffset = targetOffset + sourceLength - chunkSize;
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}
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}
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const qint64 blocksToCopy = sourceLength / blockSize;
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const qint64 chunksToCopy = sourceLength / chunkSize;
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const qint64 lastBlock = sourceLength % blockSize;
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const qint64 lastBlock = sourceLength % chunkSize;
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qint64 bytesWritten = 0;
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qint64 bytesWritten = 0;
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qint64 blocksCopied = 0;
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qint64 chunksCopied = 0;
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QByteArray buffer;
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QByteArray buffer;
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int percent = 0;
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int percent = 0;
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@ -229,7 +229,7 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
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timer.start();
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timer.start();
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QString reportText = xi18nc("@info:progress", "Copying %1 blocks (%2 bytes) from %3 to %4, direction: %5.", blocksToCopy,
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QString reportText = xi18nc("@info:progress", "Copying %1 chunks (%2 bytes) from %3 to %4, direction: %5.", chunksToCopy,
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sourceLength, readOffset, writeOffset, copyDirection == CopyDirection::Left ? i18nc("direction: left", "left")
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sourceLength, readOffset, writeOffset, copyDirection == CopyDirection::Left ? i18nc("direction: left", "left")
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: i18nc("direction: right", "right"));
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: i18nc("direction: right", "right"));
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Q_EMIT report(reportText);
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Q_EMIT report(reportText);
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@ -238,20 +238,20 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
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QFile target(targetDevice);
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QFile target(targetDevice);
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QFile source(sourceDevice);
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QFile source(sourceDevice);
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while (blocksCopied < blocksToCopy) {
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while (chunksCopied < chunksToCopy) {
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if (!(rval = readData(source, buffer, readOffset + blockSize * blocksCopied * copyDirection, blockSize)))
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if (!(rval = readData(source, buffer, readOffset + chunkSize * chunksCopied * copyDirection, chunkSize)))
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break;
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break;
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if (!(rval = writeData(target, buffer, writeOffset + blockSize * blocksCopied * copyDirection)))
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if (!(rval = writeData(target, buffer, writeOffset + chunkSize * chunksCopied * copyDirection)))
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break;
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break;
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bytesWritten += buffer.size();
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bytesWritten += buffer.size();
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if (++blocksCopied * 100 / blocksToCopy != percent) {
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if (++chunksCopied * 100 / chunksToCopy != percent) {
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percent = blocksCopied * 100 / blocksToCopy;
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percent = chunksCopied * 100 / chunksToCopy;
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if (percent % 5 == 0 && timer.elapsed() > 1000) {
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if (percent % 5 == 0 && timer.elapsed() > 1000) {
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const qint64 mibsPerSec = (blocksCopied * blockSize / 1024 / 1024) / (timer.elapsed() / 1000);
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const qint64 mibsPerSec = (chunksCopied * chunkSize / 1024 / 1024) / (timer.elapsed() / 1000);
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const qint64 estSecsLeft = (100 - percent) * timer.elapsed() / percent / 1000;
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const qint64 estSecsLeft = (100 - percent) * timer.elapsed() / percent / 1000;
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reportText = xi18nc("@info:progress", "Copying %1 MiB/second, estimated time left: %2", mibsPerSec, QTime(0, 0).addSecs(estSecsLeft).toString());
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reportText = xi18nc("@info:progress", "Copying %1 MiB/second, estimated time left: %2", mibsPerSec, QTime(0, 0).addSecs(estSecsLeft).toString());
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Q_EMIT report(reportText);
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Q_EMIT report(reportText);
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@ -262,11 +262,11 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
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// copy the remainder
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// copy the remainder
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if (rval && lastBlock > 0) {
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if (rval && lastBlock > 0) {
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Q_ASSERT(lastBlock < blockSize);
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Q_ASSERT(lastBlock < chunkSize);
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const qint64 lastBlockReadOffset = copyDirection == CopyDirection::Left ? readOffset + blockSize * blocksCopied : sourceOffset;
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const qint64 lastBlockReadOffset = copyDirection == CopyDirection::Left ? readOffset + chunkSize * chunksCopied : sourceOffset;
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const qint64 lastBlockWriteOffset = copyDirection == CopyDirection::Left ? writeOffset + blockSize * blocksCopied : targetOffset;
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const qint64 lastBlockWriteOffset = copyDirection == CopyDirection::Left ? writeOffset + chunkSize * chunksCopied : targetOffset;
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reportText = xi18nc("@info:progress", "Copying remainder of block size %1 from %2 to %3.", lastBlock, lastBlockReadOffset, lastBlockWriteOffset);
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reportText = xi18nc("@info:progress", "Copying remainder of chunk size %1 from %2 to %3.", lastBlock, lastBlockReadOffset, lastBlockWriteOffset);
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Q_EMIT report(reportText);
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Q_EMIT report(reportText);
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rval = readData(source, buffer, lastBlockReadOffset, lastBlock);
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rval = readData(source, buffer, lastBlockReadOffset, lastBlock);
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@ -280,7 +280,7 @@ QVariantMap ExternalCommandHelper::CopyFileData(const QString& sourceDevice, con
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}
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}
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}
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}
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reportText = xi18ncp("@info:progress argument 2 is a string such as 7 bytes (localized accordingly)", "Copying 1 block (%2) finished.", "Copying %1 blocks (%2) finished.", blocksCopied, i18np("1 byte", "%1 bytes", bytesWritten));
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reportText = xi18ncp("@info:progress argument 2 is a string such as 7 bytes (localized accordingly)", "Copying 1 chunk (%2) finished.", "Copying %1 chunks (%2) finished.", chunksCopied, i18np("1 byte", "%1 bytes", bytesWritten));
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Q_EMIT report(reportText);
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Q_EMIT report(reportText);
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reply[QStringLiteral("success")] = rval;
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reply[QStringLiteral("success")] = rval;
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