pid namespaces: make proc_flush_task() actually from entries from multiple namespaces
This means that proc_flush_task_mnt() is to be called for many proc mounts and
with different ids, depending on the namespace this pid is to be flushed from.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 50e149e..5e0c6a1 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2259,8 +2259,22 @@
void proc_flush_task(struct task_struct *task)
{
- proc_flush_task_mnt(proc_mnt, task->pid,
- thread_group_leader(task) ? 0 : task->tgid);
+ int i, leader;
+ struct pid *pid, *tgid;
+ struct upid *upid;
+
+ leader = thread_group_leader(task);
+ proc_flush_task_mnt(proc_mnt, task->pid, leader ? task->tgid : 0);
+ pid = task_pid(task);
+ if (pid->level == 0)
+ return;
+
+ tgid = task_tgid(task);
+ for (i = 1; i <= pid->level; i++) {
+ upid = &pid->numbers[i];
+ proc_flush_task_mnt(upid->ns->proc_mnt, upid->nr,
+ leader ? 0 : tgid->numbers[i].nr);
+ }
}
static struct dentry *proc_pid_instantiate(struct inode *dir,
