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cgroups: add the trigger callback to struct cftype

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Trigger callback can be used to receive a kick-up from the user space.  The
string written is ignored.

The cftype->private is used for multiplexing events.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Paul Menage <menage@google.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pavel Emelyanov 2008-04-29 01:00:08 -07:00 • committed by Linus Torvalds
parent 46ae220bea
commit d447ea2f30
2 changed files with 12 additions and 0 deletions
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8
include/linux/cgroup.h
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@ -243,6 +243,14 @@ struct cftype {
*/
int (*write_s64) (struct cgroup *cgrp, struct cftype *cft, s64 val);
/*
* trigger() callback can be used to get some kick from the
* userspace, when the actual string written is not important
* at all. The private field can be used to determine the
* kick type for multiplexing.
*/
int (*trigger)(struct cgroup *cgrp, unsigned int event);
int (*release) (struct inode *inode, struct file *file);
};