diff options
| -rw-r--r-- | include/linux/cgroup-defs.h | 6 | ||||
| -rw-r--r-- | kernel/cgroup.c | 19 | ||||
| -rw-r--r-- | kernel/cpuset.c | 6 | ||||
| -rw-r--r-- | mm/memcontrol.c | 3 |
4 files changed, 9 insertions, 25 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index d95cc88e9dc2..10d814bcd487 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -76,6 +76,7 @@ enum { CFTYPE_ONLY_ON_ROOT = (1 << 0), /* only create on root cgrp */ CFTYPE_NOT_ON_ROOT = (1 << 1), /* don't create on root cgrp */ CFTYPE_NO_PREFIX = (1 << 3), /* (DON'T USE FOR NEW FILES) no subsys prefix */ + CFTYPE_WORLD_WRITABLE = (1 << 4), /* (DON'T USE FOR NEW FILES) S_IWUGO */ /* internal flags, do not use outside cgroup core proper */ __CFTYPE_ONLY_ON_DFL = (1 << 16), /* only on default hierarchy */ @@ -324,11 +325,6 @@ struct cftype { */ char name[MAX_CFTYPE_NAME]; unsigned long private; - /* - * If not 0, file mode is set to this value, otherwise it will - * be figured out automatically - */ - umode_t mode; /* * The maximum length of string, excluding trailing nul, that can diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 75eba25d8dfd..5031edc6f077 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -1139,23 +1139,21 @@ static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft, * cgroup_file_mode - deduce file mode of a control file * @cft: the control file in question * - * returns cft->mode if ->mode is not 0 - * returns S_IRUGO|S_IWUSR if it has both a read and a write handler - * returns S_IRUGO if it has only a read handler - * returns S_IWUSR if it has only a write hander + * S_IRUGO for read, S_IWUSR for write. */ static umode_t cgroup_file_mode(const struct cftype *cft) { umode_t mode = 0; - if (cft->mode) - return cft->mode; - if (cft->read_u64 || cft->read_s64 || cft->seq_show) mode |= S_IRUGO; - if (cft->write_u64 || cft->write_s64 || cft->write) - mode |= S_IWUSR; + if (cft->write_u64 || cft->write_s64 || cft->write) { + if (cft->flags & CFTYPE_WORLD_WRITABLE) + mode |= S_IWUGO; + else + mode |= S_IWUSR; + } return mode; } @@ -4371,7 +4369,6 @@ static struct cftype cgroup_dfl_base_files[] = { .seq_show = cgroup_pidlist_show, .private = CGROUP_FILE_PROCS, .write = cgroup_procs_write, - .mode = S_IRUGO | S_IWUSR, }, { .name = "cgroup.controllers", @@ -4406,7 +4403,6 @@ static struct cftype cgroup_legacy_base_files[] = { .seq_show = cgroup_pidlist_show, .private = CGROUP_FILE_PROCS, .write = cgroup_procs_write, - .mode = S_IRUGO | S_IWUSR, }, { .name = "cgroup.clone_children", @@ -4426,7 +4422,6 @@ static struct cftype cgroup_legacy_base_files[] = { .seq_show = cgroup_pidlist_show, .private = CGROUP_FILE_TASKS, .write = cgroup_tasks_write, - .mode = S_IRUGO | S_IWUSR, }, { .name = "notify_on_release", diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 20eedd8098c0..312961ef3ccc 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -1597,9 +1597,6 @@ static int cpuset_write_u64(struct cgroup_subsys_state *css, struct cftype *cft, case FILE_MEMORY_PRESSURE_ENABLED: cpuset_memory_pressure_enabled = !!val; break; - case FILE_MEMORY_PRESSURE: - retval = -EACCES; - break; case FILE_SPREAD_PAGE: retval = update_flag(CS_SPREAD_PAGE, cs, val); break; @@ -1866,9 +1863,6 @@ static struct cftype files[] = { { .name = "memory_pressure", .read_u64 = cpuset_read_u64, - .write_u64 = cpuset_write_u64, - .private = FILE_MEMORY_PRESSURE, - .mode = S_IRUGO, }, { diff --git a/mm/memcontrol.c b/mm/memcontrol.c index b35c4cc47a30..e672f2689326 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4060,8 +4060,7 @@ static struct cftype mem_cgroup_legacy_files[] = { { .name = "cgroup.event_control", /* XXX: for compat */ .write = memcg_write_event_control, - .flags = CFTYPE_NO_PREFIX, - .mode = S_IWUGO, + .flags = CFTYPE_NO_PREFIX | CFTYPE_WORLD_WRITABLE, }, { .name = "swappiness", |