Messages in this thread Patch in this message | | | From | Lord Glauber Costa of Sealand <> | Subject | [PATCH v6 02/12] cgroup: implement CFTYPE_NO_PREFIX | Date | Thu, 24 Jan 2013 19:17:32 +0400 |
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From: Tejun Heo <tj@kernel.org>
When cgroup files are created, cgroup core automatically prepends the name of the subsystem as prefix. This patch adds CFTYPE_NO_PREFIX which disables the automatic prefix.
This will be used to deprecate cpuacct which will make cpu create and serve the cpuacct files.
Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Glauber Costa <glommer@parallels.com> --- include/linux/cgroup.h | 1 + kernel/cgroup.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 7d73905..7d193f9 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -277,6 +277,7 @@ struct cgroup_map_cb { /* cftype->flags */ #define CFTYPE_ONLY_ON_ROOT (1U << 0) /* only create on root cg */ #define CFTYPE_NOT_ON_ROOT (1U << 1) /* don't create on root cg */ +#define CFTYPE_NO_PREFIX (1U << 2) /* skip subsys prefix */ #define MAX_CFTYPE_NAME 64 diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 4855892..2f98398 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2723,7 +2723,8 @@ static int cgroup_add_file(struct cgroup *cgrp, struct cgroup_subsys *subsys, simple_xattrs_init(&cft->xattrs); - if (subsys && !test_bit(ROOT_NOPREFIX, &cgrp->root->flags)) { + if (subsys && !(cft->flags & CFTYPE_NO_PREFIX) && + !test_bit(ROOT_NOPREFIX, &cgrp->root->flags)) { strcpy(name, subsys->name); strcat(name, "."); } -- 1.8.1
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