diff options
| author | Aristeu Rozanski <[email protected]> | 2012-10-04 17:15:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2012-10-06 03:05:13 +0900 |
| commit | 66b8ef67756b3051bf42a077a82c3c5c279caa5b (patch) | |
| tree | 60527442334744981f0766dae6f46bf7ae9b4d4f | |
| parent | 12ae6779332181432a7feda740735ffa5bb3d32d (diff) | |
device_cgroup: add "deny_all" in dev_cgroup structure
deny_all will determine if the default policy is to deny all device access
unless for the ones in the exception list.
This variable will be used in the next patches to convert device_cgroup
internally into a default policy + rules.
Signed-off-by: Aristeu Rozanski <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Li Zefan <[email protected]>
Cc: James Morris <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Acked-by: Serge E. Hallyn <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | security/device_cgroup.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/security/device_cgroup.c b/security/device_cgroup.c index 4b877a92a7ea..e3ce02a00ffc 100644 --- a/security/device_cgroup.c +++ b/security/device_cgroup.c @@ -42,6 +42,7 @@ struct dev_whitelist_item { struct dev_cgroup { struct cgroup_subsys_state css; struct list_head whitelist; + bool deny_all; }; static inline struct dev_cgroup *css_to_devcgroup(struct cgroup_subsys_state *s) @@ -178,12 +179,14 @@ static struct cgroup_subsys_state *devcgroup_create(struct cgroup *cgroup) wh->minor = wh->major = ~0; wh->type = DEV_ALL; wh->access = ACC_MASK; + dev_cgroup->deny_all = false; list_add(&wh->list, &dev_cgroup->whitelist); } else { parent_dev_cgroup = cgroup_to_devcgroup(parent_cgroup); mutex_lock(&devcgroup_mutex); ret = dev_whitelist_copy(&dev_cgroup->whitelist, &parent_dev_cgroup->whitelist); + dev_cgroup->deny_all = parent_dev_cgroup->deny_all; mutex_unlock(&devcgroup_mutex); if (ret) { kfree(dev_cgroup); @@ -409,9 +412,11 @@ handle: case DEVCG_ALLOW: if (!parent_has_perm(devcgroup, &wh)) return -EPERM; + devcgroup->deny_all = false; return dev_whitelist_add(devcgroup, &wh); case DEVCG_DENY: dev_whitelist_rm(devcgroup, &wh); + devcgroup->deny_all = true; break; default: return -EINVAL; |