diff options
| author | Colin Cross <ccross@android.com> | 2011-07-12 19:53:24 -0700 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@freescale.com> | 2014-04-21 22:34:36 -0500 |
| commit | a610abc9f079310459d604869153e92c261b7f6b (patch) | |
| tree | 6bb2b8cc6562e9817c15d36ee41c8f9a5dc9fdd9 /include/linux/cgroup.h | |
| parent | 5e56e0b1f1b761d1730d263df6a9a3b6806466e6 (diff) | |
cgroup: Add generic cgroup subsystem permission checks
Rather than using explicit euid == 0 checks when trying to move
tasks into a cgroup via CFS, move permission checks into each
specific cgroup subsystem. If a subsystem does not specify a
'allow_attach' handler, then we fall back to doing our checks
the old way.
Use the 'allow_attach' handler for the 'cpu' cgroup to allow
non-root processes to add arbitrary processes to a 'cpu' cgroup
if it has the CAP_SYS_NICE capability set.
This version of the patch adds a 'allow_attach' handler instead
of reusing the 'can_attach' handler. If the 'can_attach' handler
is reused, a new cgroup that implements 'can_attach' but not
the permission checks could end up with no permission checks
at all.
Change-Id: Icfa950aa9321d1ceba362061d32dc7dfa2c64f0c
Original-Author: San Mehat <san@google.com>
Signed-off-by: Colin Cross <ccross@android.com>
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 8852d370c720..32a4f95d0bd7 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -578,6 +578,7 @@ struct cgroup_subsys { void (*css_offline)(struct cgroup *cgrp); void (*css_free)(struct cgroup *cgrp); + int (*allow_attach)(struct cgroup *cgrp, struct cgroup_taskset *tset); int (*can_attach)(struct cgroup *cgrp, struct cgroup_taskset *tset); void (*cancel_attach)(struct cgroup *cgrp, struct cgroup_taskset *tset); void (*attach)(struct cgroup *cgrp, struct cgroup_taskset *tset); |