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cgroup: clean up the cftype array for the base cgroup files

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* Rename it from files[] (really?) to cgroup_base_files[].

* Drop CGROUP_FILE_GENERIC_PREFIX which was defined as "cgroup." and
  used inconsistently.  Just use "cgroup." directly.

* Collect insane files at the end.  Note that only the insane ones are
  missing "cgroup." prefix.

This patch doesn't introduce any functional changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
This commit is contained in:
Tejun Heo 2013-06-03 19:14:34 -07:00
parent cc5943a781
commit d5c56ced77
1 changed files with 24 additions and 23 deletions
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47
kernel/cgroup.c
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@ -4029,35 +4029,16 @@ static int cgroup_clone_children_write(struct cgroup *cgrp,
return 0;
}
/*
* for the common functions, 'private' gives the type of file
*/
/* for hysterical raisins, we can't put this on the older files */
#define CGROUP_FILE_GENERIC_PREFIX "cgroup."
static struct cftype files[] = {
static struct cftype cgroup_base_files[] = {
{
.name = "tasks",
.flags = CFTYPE_INSANE, /* use "procs" instead */
.open = cgroup_tasks_open,
.write_u64 = cgroup_tasks_write,
.release = cgroup_pidlist_release,
.mode = S_IRUGO | S_IWUSR,
},
{
.name = CGROUP_FILE_GENERIC_PREFIX "procs",
.name = "cgroup.procs",
.open = cgroup_procs_open,
.write_u64 = cgroup_procs_write,
.release = cgroup_pidlist_release,
.mode = S_IRUGO | S_IWUSR,
},
{
.name = "notify_on_release",
.flags = CFTYPE_INSANE,
.read_u64 = cgroup_read_notify_on_release,
.write_u64 = cgroup_write_notify_on_release,
},
{
.name = CGROUP_FILE_GENERIC_PREFIX "event_control",
.name = "cgroup.event_control",
.write_string = cgroup_write_event_control,
.mode = S_IWUGO,
},
@ -4072,6 +4053,26 @@ static struct cftype files[] = {
.flags = CFTYPE_ONLY_ON_ROOT,
.read_seq_string = cgroup_sane_behavior_show,
},
/*
* Historical crazy stuff. These don't have "cgroup." prefix and
* don't exist if sane_behavior. If you're depending on these, be
* prepared to be burned.
*/
{
.name = "tasks",
.flags = CFTYPE_INSANE, /* use "procs" instead */
.open = cgroup_tasks_open,
.write_u64 = cgroup_tasks_write,
.release = cgroup_pidlist_release,
.mode = S_IRUGO | S_IWUSR,
},
{
.name = "notify_on_release",
.flags = CFTYPE_INSANE,
.read_u64 = cgroup_read_notify_on_release,
.write_u64 = cgroup_write_notify_on_release,
},
{
.name = "release_agent",
.flags = CFTYPE_INSANE | CFTYPE_ONLY_ON_ROOT,
@ -4095,7 +4096,7 @@ static int cgroup_populate_dir(struct cgroup *cgrp, bool base_files,
struct cgroup_subsys *ss;
if (base_files) {
err = cgroup_addrm_files(cgrp, NULL, files, true);
err = cgroup_addrm_files(cgrp, NULL, cgroup_base_files, true);
if (err < 0)
return err;
}