c/r: fcntl: add F_GETOWNER_UIDS option

When we restore file descriptors we would like them to look exactly as
they were at dumping time.

With help of fcntl it's almost possible, the missing snippet is file
owners UIDs.

To be able to read their values the F_GETOWNER_UIDS is introduced.

This option is valid iif CONFIG_CHECKPOINT_RESTORE is turned on, otherwise
returning -EINVAL.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This commit is contained in:

Cyrill Gorcunov

2012-07-30 17:25:21 -07:00

committed by

Linus Torvalds

parent 65fed8f6f2

commit 1d151c337d

3 changed files with 34 additions and 0 deletions

									
										include/asm-generic/fcntl.h
									
		+4
		
												View File
												
				@@ -120,6 +120,10 @@

				#define F_GETOWN_EX	16

				#endif

				#ifndef F_GETOWNER_UIDS

				#define F_GETOWNER_UIDS	17

				#endif

				#define F_OWNER_TID	0

				#define F_OWNER_PID	1

				#define F_OWNER_PGRP	2