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authorEric W. Biederman <ebiederm@xmission.com>2010-07-12 17:10:36 -0700
committerEric W. Biederman <ebiederm@xmission.com>2012-11-19 05:59:15 -0800
commit1c4042c29bd2e85aac4110552ca8ade763762e84 (patch)
tree90b34aeae51c9afa088eac37be4e8a14a038e6be
parent57e8391d327609cbf12d843259c968b9e5c1838f (diff)
downloadop-kernel-dev-1c4042c29bd2e85aac4110552ca8ade763762e84.zip
op-kernel-dev-1c4042c29bd2e85aac4110552ca8ade763762e84.tar.gz
pidns: Consolidate initialzation of special init task state
Instead of setting child_reaper and SIGNAL_UNKILLABLE one way for the system init process, and another way for pid namespace init processes test pid->nr == 1 and use the same code for both. For the global init this results in SIGNAL_UNKILLABLE being set much earlier in the initialization process. This is a small cleanup and it paves the way for allowing unshare and enter of the pid namespace as that path like our global init also will not set CLONE_NEWPID. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
-rw-r--r--init/main.c1
-rw-r--r--kernel/fork.c6
2 files changed, 3 insertions, 4 deletions
diff --git a/init/main.c b/init/main.c
index 9cf77ab..317750a 100644
--- a/init/main.c
+++ b/init/main.c
@@ -810,7 +810,6 @@ static int __ref kernel_init(void *unused)
system_state = SYSTEM_RUNNING;
numa_default_policy();
- current->signal->flags |= SIGNAL_UNKILLABLE;
flush_delayed_fput();
if (ramdisk_execute_command) {
diff --git a/kernel/fork.c b/kernel/fork.c
index 666dc8b..0f2bbce 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1039,8 +1039,6 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
atomic_set(&sig->live, 1);
atomic_set(&sig->sigcnt, 1);
init_waitqueue_head(&sig->wait_chldexit);
- if (clone_flags & CLONE_NEWPID)
- sig->flags |= SIGNAL_UNKILLABLE;
sig->curr_target = tsk;
init_sigpending(&sig->shared_pending);
INIT_LIST_HEAD(&sig->posix_timers);
@@ -1441,8 +1439,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
ptrace_init_task(p, (clone_flags & CLONE_PTRACE) || trace);
if (thread_group_leader(p)) {
- if (is_child_reaper(pid))
+ if (is_child_reaper(pid)) {
ns_of_pid(pid)->child_reaper = p;
+ p->signal->flags |= SIGNAL_UNKILLABLE;
+ }
p->signal->leader_pid = pid;
p->signal->tty = tty_kref_get(current->signal->tty);
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