static void __put_pid(struct pid_kddm_object *obj)
{
struct pid *pid = obj->pid;
int nr = pid_knr(pid);
int may_put;
int grabbed = 0;
/* Try to avoid grabing the kddm object */
read_lock(&tasklist_lock);
spin_lock(&pid_kddm_lock);
may_put = may_put_pid(obj);
spin_unlock(&pid_kddm_lock);
if (!may_put)
goto release_work;
read_unlock(&tasklist_lock);
/* The pid seems to be unused locally. Have to check globally. */
/* Prevent pidmaps from changing host nodes. */
pidmap_map_read_lock();
fkddm_grab_object(kddm_def_ns, PID_KDDM_ID, nr,
KDDM_NO_FT_REQ | KDDM_DONT_KILL);
grabbed = 1;
read_lock(&tasklist_lock);
spin_lock(&pid_kddm_lock);
may_put = may_put_pid(obj);
if (may_put) {
obj->active = 0;
obj->node_count--;
if (obj->node_count)
/* Still used elsewhere */
may_put = 0;
}
spin_unlock(&pid_kddm_lock);
release_work:
spin_lock(&put_pid_wq_lock);
list_del_init(&obj->wq);
spin_unlock(&put_pid_wq_lock);
read_unlock(&tasklist_lock);
if (may_put) {
_kddm_remove_frozen_object(pid_kddm_set, nr);
pidmap_map_read_unlock();
} else if (grabbed) {
_kddm_put_object(pid_kddm_set, nr);
pidmap_map_read_unlock();
}
}
void krg_ipc_shm_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp)
{
struct kddm_set *mm_set;
int index;
key_t key;
index = ipcid_to_idx(shp->shm_perm.id);
key = shp->shm_perm.key;
mm_set = shp->shm_file->f_dentry->d_inode->i_mapping->kddm_set;
if (key != IPC_PRIVATE) {
_kddm_grab_object_no_ft(shm_ids(ns).krgops->key_kddm_set, key);
_kddm_remove_frozen_object(shm_ids(ns).krgops->key_kddm_set, key);
}
local_shm_unlock(shp);
_kddm_remove_frozen_object(shm_ids(ns).krgops->data_kddm_set, index);
_destroy_kddm_set(mm_set);
krg_ipc_rmid(&shm_ids(ns), index);
}
void krg_task_abort(struct task_struct *task)
{
struct task_kddm_object *obj = task->task_obj;
#ifdef CONFIG_KRG_EPM
if (krg_current)
return;
#endif
if (!obj)
return;
obj->write_locked = 2;
up_write(&obj->sem);
_kddm_remove_frozen_object(task_kddm_set, obj->pid);
}
