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authorBen Blum <bblum@andrew.cmu.edu>2011-05-26 23:25:19 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-27 00:12:34 (GMT)
commitf780bdb7c1c73009cb57adcf99ef50027d80bf3c (patch)
treed15668ffcc40a2aaa31723b87cfda0b166f84d57 /security
parent4714d1d32d97239fb5ae3e10521d3f133a899b66 (diff)
cgroups: add per-thread subsystem callbacks
Add cgroup subsystem callbacks for per-thread attachment in atomic contexts Add can_attach_task(), pre_attach(), and attach_task() as new callbacks for cgroups's subsystem interface. Unlike can_attach and attach, these are for per-thread operations, to be called potentially many times when attaching an entire threadgroup. Also, the old "bool threadgroup" interface is removed, as replaced by this. All subsystems are modified for the new interface - of note is cpuset, which requires from/to nodemasks for attach to be globally scoped (though per-cpuset would work too) to persist from its pre_attach to attach_task and attach. This is a pre-patch for cgroup-procs-writable.patch. Signed-off-by: Ben Blum <bblum@andrew.cmu.edu> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Matt Helsley <matthltc@us.ibm.com> Reviewed-by: Paul Menage <menage@google.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security')
-rw-r--r--security/device_cgroup.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/security/device_cgroup.c b/security/device_cgroup.c
index 8d9c48f..cd1f779 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
@@ -62,8 +62,7 @@ static inline struct dev_cgroup *task_devcgroup(struct task_struct *task)
struct cgroup_subsys devices_subsys;
static int devcgroup_can_attach(struct cgroup_subsys *ss,
- struct cgroup *new_cgroup, struct task_struct *task,
- bool threadgroup)
+ struct cgroup *new_cgroup, struct task_struct *task)
{
if (current != task && !capable(CAP_SYS_ADMIN))
return -EPERM;

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