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cgroups: show correct file mode

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We have some read-only files and write-only files, but currently they are
all set to 0644, which is counter-intuitive and cause trouble for some
cgroup tools like libcgroup.

This patch adds 'mode' to struct cftype to allow cgroup subsys to set it's
own files' file mode, and for the most cases cft->mode can be default to 0
and cgroup will figure out proper mode.

Acked-by: Paul Menage <menage@google.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Li Zefan
2009-04-02 16:57:29 -07:00
committed by Linus Torvalds
parent b6719ec1ad
commit 099fca3225
3 changed files with 40 additions and 4 deletions
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5
include/linux/cgroup.h
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@@ -258,6 +258,11 @@ struct cftype {
*/
char name[MAX_CFTYPE_NAME];
int private;
/*
* If not 0, file mode is set to this value, otherwise it will
* be figured out automatically
*/
mode_t mode;
/*
* If non-zero, defines the maximum length of string that can