fix path creation for some files, fix getting the user buffer in read

Author: scostache

README

@@ -1,3 +1,6 @@
 Linux Filesystem driver for WINDOWS
 
-
+To build LklVfs you'll need LKL and Mingw.
+To test it you need mount tools by Matt Wu (http://ext2fsd.sourceforge.net/resources/resources.htm)
+or the filedisk tool (http://www.acc.umu.se/~bosse/) if you want to mount a image that contains a Linux filesystem.
+To see a list of bugs ( fixed or not): http://bugs.launchpad.net/lklvfs/

src/misc.c

@@ -89,7 +89,7 @@ PSTR VfsCopyUnicodeStringToZcharUnixPath(PSTR root_path, USHORT root_path_len,
 
 	root_path_len = root_path_len + length;
 
-	if(dest[root_path_len-1] != '/') {
+	if(dest[root_path_len-1] != '/' && name_length != 0) {
 		dest[root_path_len] = '/';
 		root_path_len++;
 	}

src/read.c

@@ -123,8 +123,6 @@ NTSTATUS CommonRead(PIRPCONTEXT irp_context, PIRP irp)
 	CHECK_OUT(ccb->id.type != CCB || ccb->id.size !=sizeof(LKLCCB), STATUS_INVALID_PARAMETER);
 
  	DbgPrint("READ");
-	// BUG! BUG! BUG!
-	TRY_RETURN(STATUS_INVALID_PARAMETER);
 	// Obtain any resources that are appropriate to ensure consistency of data.
 	if (!pagingIo) {
 		ExAcquireResourceSharedLite(&fcb->fcb_resource, TRUE);
@@ -143,7 +141,7 @@ NTSTATUS CommonRead(PIRPCONTEXT irp_context, PIRP irp)
 		}
 		length = (ULONG)(fcb->common_header.FileSize.QuadPart - byte_offset.QuadPart);
 	}
-	
+	userBuffer = GetUserBuffer(irp);
 	if (!nonBufferedIo) {
 		// If this is a buffered I/O request and caching has not yet been initiated on the
 		// FCB, invoke CcInitializeCacheMap to initiate caching at this time.
@@ -159,7 +157,6 @@ NTSTATUS CommonRead(PIRPCONTEXT irp_context, PIRP irp)
 		} else {
 			// If this is a buffered non-MDL I/O request, forward the request 
 			// on to the NT Cache Manager via an invocation to CcCopyRead
-			userBuffer = GetUserBuffer(irp);
 			CcCopyRead(file, &(byte_offset), length, TRUE, userBuffer, &(irp->IoStatus));
 			// We have the data
 			status = irp->IoStatus.Status;

src/sys_wrappers.c

@@ -78,9 +78,11 @@ LONG sys_lseek_wrapper(UINT fd, off_t offset, UINT origin)
 LONG sys_newfstat_wrapper(UINT fd, OUT PSTATS stat_buff)
 {
 	LONG rc;
+
 	ExAcquireResourceExclusiveLite(&barier, TRUE);
 	rc = sys_newfstat(fd, stat_buff);
 	RELEASE(&barier);
+
 	return rc;
 }
 
@@ -230,7 +232,7 @@ LONG sys_unmount_wrapper(PLINDEV ldev)
      if(!ldev)
          return -1;
 
-     rc = sys_umount(ldev->mnt, 0x00000002);
+     rc = sys_umount(ldev->mnt, 0);
      if(rc <0)
            return rc;