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Message-ID: <20070417131754.GD4001@in.ibm.com> Date: Tue, 17 Apr 2007 18:47:54 +0530 From: Bharata B Rao <bharata@...ux.vnet.ibm.com> To: linux-kernel@...r.kernel.org Cc: linux-fsdevel@...r.kernel.org, Jan Blunck <j.blunck@...harburg.de> Subject: [RFC][PATCH 3/15] Add the whiteout file type From: Jan Blunck <j.blunck@...harburg.de> Subject: Add the whiteout file type 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 <j.blunck@...harburg.de> Signed-off-by: Bharata B Rao <bharata@...ux.vnet.ibm.com> --- 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 @@ -28,6 +29,7 @@ #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) #define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) #define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) +#define S_ISWHT(m) (((m) & S_IFMT) == S_IFWHT) #define S_IRWXU 00700 #define S_IRUSR 00400 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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