On 5/14/07, Jan Engelhardt <[email protected]> wrote:
On May 14 2007 15:09, Bharata B Rao wrote:
>
>A white-out stops the VFS from further lookups of the white-outs name and
>returns -ENOENT. This is the same behaviour as if the filename isn't
>found. This can be used in combination with union mounts to virtually
>delete (white-out) files by creating a file with this file type.
>
>Signed-off-by: Jan Blunck <[email protected]>
>Signed-off-by: Bharata B Rao <[email protected]>
>---
> include/linux/stat.h | 2 ++
> 1 files changed, 2 insertions(+)
>
>--- a/include/linux/stat.h
>+++ b/include/linux/stat.h
>@@ -10,6 +10,7 @@
> #if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
>
> #define S_IFMT 00170000
>+#define S_IFWHT 0160000 /* whiteout */
> #define S_IFSOCK 0140000
> #define S_IFLNK 0120000
> #define S_IFREG 0100000
I wonder why 110000, 130000 or 150000 could not also be used?
I used the S_IFWHT definition like it is referenced in stat(2). I
guess it would be a good idea to use the same flag on BSD and Linux.
As you can see in stat(2) other OS use 011, 013 and 015.
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