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[net-next,RFC,v1,01/27] afnetns: add CLONE_NEWAFNET flag

Message ID 20170312230151.5185-2-hannes@stressinduktion.org
State RFC, archived
Delegated to: David Miller
Headers show

Commit Message

Hannes Frederic Sowa March 12, 2017, 11:01 p.m. UTC
This patch adds a new clone flag. It will be used if a clone should also
open up a new afnetns namespace. The only restriction placed on this new
flag, is, that it cannot be used together with CLONE_NEWNET.

The previous usage of flag 0x00001000 was used for CLONE_IDLETASK until
2004. It was only allowed to be used by the kernel, thus I consider its
usage safe.

Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
---
 include/uapi/linux/sched.h | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/include/uapi/linux/sched.h b/include/uapi/linux/sched.h
index 5f0fe019a7204e..b48dea58f55524 100644
--- a/include/uapi/linux/sched.h
+++ b/include/uapi/linux/sched.h
@@ -9,6 +9,7 @@ 
 #define CLONE_FS	0x00000200	/* set if fs info shared between processes */
 #define CLONE_FILES	0x00000400	/* set if open files shared between processes */
 #define CLONE_SIGHAND	0x00000800	/* set if signal handlers and blocked signals shared */
+#define CLONE_NEWAFNET	0x00001000	/* Clone new afnet context */
 #define CLONE_PTRACE	0x00002000	/* set if we want to let tracing continue on the child too */
 #define CLONE_VFORK	0x00004000	/* set if the parent wants the child to wake it up on mm_release */
 #define CLONE_PARENT	0x00008000	/* set if we want to have the same parent as the cloner */