+ }
+
+ if(ok)
+ yaffs_HardlinkFixup(dev,hardList);
+
+ return ok ? 1 : 0;
+}
+
+static int yaffs_WriteCheckpointData(yaffs_Device *dev)
+{
+
+ int ok;
+
+ ok = yaffs_CheckpointOpen(dev,1);
+
+ if(ok)
+ ok = yaffs_WriteCheckpointValidityMarker(dev,1);
+ if(ok)
+ ok = yaffs_WriteCheckpointDevice(dev);
+ if(ok)
+ ok = yaffs_WriteCheckpointObjects(dev);
+ if(ok)
+ ok = yaffs_WriteCheckpointValidityMarker(dev,0);
+
+ yaffs_CheckpointClose(dev);
+
+// if(dev->checkpointBytes)
+ dev->isCheckpointed = 1;
+// else
+ //dev->isCheckpointed = 0;
+
+ return dev->isCheckpointed;
+}
+
+static int yaffs_ReadCheckpointData(yaffs_Device *dev)
+{
+ int ok;
+
+ ok = yaffs_CheckpointOpen(dev,0); /* open for read */
+
+ if(ok)
+ ok = yaffs_ReadCheckpointValidityMarker(dev,1);
+ if(ok)
+ ok = yaffs_ReadCheckpointDevice(dev);
+ if(ok)
+ ok = yaffs_ReadCheckpointObjects(dev);
+ if(ok)
+ ok = yaffs_ReadCheckpointValidityMarker(dev,0);
+
+
+
+ yaffs_CheckpointClose(dev);
+
+// if(ok)
+ dev->isCheckpointed = 1;
+// else
+// dev->isCheckpointed = 0;
+
+ return ok ? 1 : 0;
+
+}
+
+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
+{
+ if(dev->isCheckpointed){
+ dev->isCheckpointed = 0;
+ yaffs_CheckpointInvalidateStream(dev);
+ if(dev->superBlock && dev->markSuperBlockDirty)
+ dev->markSuperBlockDirty(dev->superBlock);
+ }
+}
+
+
+int yaffs_CheckpointSave(yaffs_Device *dev)
+{
+ if(!dev->isCheckpointed)
+ yaffs_WriteCheckpointData(dev);
+
+ return dev->isCheckpointed;
+}
+
+int yaffs_CheckpointRestore(yaffs_Device *dev)
+{
+
+ return yaffs_ReadCheckpointData(dev);
+}
+
+/*--------------------- File read/write ------------------------
+ * Read and write have very similar structures.
+ * In general the read/write has three parts to it
+ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
+ * Some complete chunks
+ * An incomplete chunk to end off with
+ *
+ * Curve-balls: the first chunk might also be the last chunk.
+ */
+
+int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, __u32 offset,
+ int nBytes)
+{
+
+ int chunk;
+ int start;
+ int nToCopy;
+ int n = nBytes;
+ int nDone = 0;
+ yaffs_ChunkCache *cache;
+
+ yaffs_Device *dev;
+
+ dev = in->myDev;
+
+ while (n > 0) {
+ chunk = offset / dev->nBytesPerChunk + 1; /* The first chunk is 1 */
+ start = offset % dev->nBytesPerChunk;
+
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
+ if ((start + n) < dev->nBytesPerChunk) {
+ nToCopy = n;
+ } else {
+ nToCopy = dev->nBytesPerChunk - start;
+ }
+
+ cache = yaffs_FindChunkCache(in, chunk);
+
+ /* If the chunk is already in the cache or it is less than a whole chunk
+ * then use the cache (if there is caching)
+ * else bypass the cache.
+ */
+ if (cache || nToCopy != dev->nBytesPerChunk) {
+ if (dev->nShortOpCaches > 0) {
+
+ /* If we can't find the data in the cache, then load it up. */
+
+ if (!cache) {
+ cache = yaffs_GrabChunkCache(in->myDev);
+ cache->object = in;
+ cache->chunkId = chunk;
+ cache->dirty = 0;
+ cache->locked = 0;
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ cache->
+ data);
+ cache->nBytes = 0;
+ }
+
+ yaffs_UseChunkCache(dev, cache, 0);
+
+ cache->locked = 1;
+
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_UnlockYAFFS(TRUE);
+#endif
+ memcpy(buffer, &cache->data[start], nToCopy);
+
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_LockYAFFS(TRUE);
+#endif
+ cache->locked = 0;
+ } else {
+ /* Read into the local buffer then copy..*/
+
+ __u8 *localBuffer =
+ yaffs_GetTempBuffer(dev, __LINE__);
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ localBuffer);
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_UnlockYAFFS(TRUE);
+#endif
+ memcpy(buffer, &localBuffer[start], nToCopy);
+
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_LockYAFFS(TRUE);
+#endif
+ yaffs_ReleaseTempBuffer(dev, localBuffer,
+ __LINE__);
+ }
+
+ } else {
+#ifdef CONFIG_YAFFS_WINCE
+ __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
+
+ /* Under WinCE can't do direct transfer. Need to use a local buffer.
+ * This is because we otherwise screw up WinCE's memory mapper
+ */
+ yaffs_ReadChunkDataFromObject(in, chunk, localBuffer);
+
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_UnlockYAFFS(TRUE);
+#endif
+ memcpy(buffer, localBuffer, dev->nBytesPerChunk);
+
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_LockYAFFS(TRUE);
+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
+#endif
+
+#else
+ /* A full chunk. Read directly into the supplied buffer. */
+ yaffs_ReadChunkDataFromObject(in, chunk, buffer);
+#endif
+ }
+
+ n -= nToCopy;
+ offset += nToCopy;
+ buffer += nToCopy;
+ nDone += nToCopy;
+
+ }
+
+ return nDone;
+}
+
+int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, __u32 offset,
+ int nBytes, int writeThrough)
+{
+
+ int chunk;
+ int start;
+ int nToCopy;
+ int n = nBytes;
+ int nDone = 0;
+ int nToWriteBack;
+ int startOfWrite = offset;
+ int chunkWritten = 0;
+ int nBytesRead;
+
+ yaffs_Device *dev;
+
+ dev = in->myDev;
+
+ while (n > 0 && chunkWritten >= 0) {
+ chunk = offset / dev->nBytesPerChunk + 1;
+ start = offset % dev->nBytesPerChunk;
+
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
+
+ if ((start + n) < dev->nBytesPerChunk) {
+ nToCopy = n;
+
+ /* Now folks, to calculate how many bytes to write back....
+ * If we're overwriting and not writing to then end of file then
+ * we need to write back as much as was there before.
+ */
+
+ nBytesRead =
+ in->variant.fileVariant.fileSize -
+ ((chunk - 1) * dev->nBytesPerChunk);
+
+ if (nBytesRead > dev->nBytesPerChunk) {
+ nBytesRead = dev->nBytesPerChunk;
+ }
+
+ nToWriteBack =
+ (nBytesRead >
+ (start + n)) ? nBytesRead : (start + n);
+
+ } else {