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| author | Daniel Lezcano <daniel.lezcano@free.fr> | 2010-10-28 00:33:38 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-28 03:03:09 +0200 |
| commit | 45531757b45cae0ce64c5aff08c2534d5a0fa3e7 (patch) | |
| tree | df9651eb91e4515684e055fa9454dce009be9ab4 /kernel/ns_cgroup.c | |
| parent | cgroups: add check for strcpy destination string overflow (diff) | |
| download | linux-45531757b45cae0ce64c5aff08c2534d5a0fa3e7.tar.xz linux-45531757b45cae0ce64c5aff08c2534d5a0fa3e7.zip | |
cgroup: notify ns_cgroup deprecated
The ns_cgroup will be removed very soon. Let's warn, for this version,
ns_cgroup is deprecated.
Make ns_cgroup and clone_children exclusive. If the clone_children is set
and the ns_cgroup is mounted, let's fail with EINVAL when the ns_cgroup
subsys is created (a printk will help the user to understand why the
creation fails).
Update the feature remove schedule file with the deprecated ns_cgroup.
Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/ns_cgroup.c')
| -rw-r--r-- | kernel/ns_cgroup.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/ns_cgroup.c b/kernel/ns_cgroup.c index 2a5dfec8efe0..2c98ad94ba0e 100644 --- a/kernel/ns_cgroup.c +++ b/kernel/ns_cgroup.c @@ -85,6 +85,14 @@ static struct cgroup_subsys_state *ns_create(struct cgroup_subsys *ss, return ERR_PTR(-EPERM); if (!cgroup_is_descendant(cgroup, current)) return ERR_PTR(-EPERM); + if (test_bit(CGRP_CLONE_CHILDREN, &cgroup->flags)) { + printk("ns_cgroup can't be created with parent " + "'clone_children' set.\n"); + return ERR_PTR(-EINVAL); + } + + printk_once("ns_cgroup deprecated: consider using the " + "'clone_children' flag without the ns_cgroup.\n"); ns_cgroup = kzalloc(sizeof(*ns_cgroup), GFP_KERNEL); if (!ns_cgroup) |