struct file *file;
struct pid_namespace *ns;
struct timer_list timer;
+ struct list_head list;
};
static DEFINE_SPINLOCK(acct_lock);
+static LIST_HEAD(acct_list);
/*
* Called whenever the timer says to check the free space.
acct->needcheck = 0;
acct->file = NULL;
acct->ns = NULL;
+ list_del(&acct->list);
}
if (file) {
acct->file = file;
acct->ns = ns;
acct->needcheck = 0;
acct->active = 1;
+ list_add(&acct->list, &acct_list);
/* It's been deleted if it was used before so this is safe */
setup_timer(&acct->timer, acct_timeout, (unsigned long)acct);
acct->timer.expires = jiffies + ACCT_TIMEOUT*HZ;
{
struct bsd_acct_struct *acct;
- acct = init_pid_ns.bacct;
- if (acct == NULL)
- return;
-
spin_lock(&acct_lock);
- if (acct->file && acct->file->f_path.mnt == m)
- acct_file_reopen(acct, NULL, NULL);
+restart:
+ list_for_each_entry(acct, &acct_list, list)
+ if (acct->file && acct->file->f_path.mnt == m) {
+ acct_file_reopen(acct, NULL, NULL);
+ goto restart;
+ }
spin_unlock(&acct_lock);
}
{
struct bsd_acct_struct *acct;
- acct = init_pid_ns.bacct;
- if (acct == NULL)
- return;
-
spin_lock(&acct_lock);
- if (acct->file && acct->file->f_path.mnt->mnt_sb == sb)
- acct_file_reopen(acct, NULL, NULL);
+restart:
+ list_for_each_entry(acct, &acct_list, list)
+ if (acct->file && acct->file->f_path.mnt->mnt_sb == sb) {
+ acct_file_reopen(acct, NULL, NULL);
+ goto restart;
+ }
spin_unlock(&acct_lock);
}
#endif
spin_lock_irq(¤t->sighand->siglock);
- tty = current->signal->tty;
+ tty = current->signal->tty; /* Safe as we hold the siglock */
ac.ac_tty = tty ? old_encode_dev(tty_devnum(tty)) : 0;
ac.ac_utime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_utime)));
ac.ac_stime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_stime)));
spin_unlock_irq(¤t->sighand->siglock);
}
-/**
- * acct_process - now just a wrapper around do_acct_process
- *
- * handles process accounting for an exiting task
- */
-void acct_process(void)
+static void acct_process_in_ns(struct pid_namespace *ns)
{
struct file *file = NULL;
- struct pid_namespace *ns = task_active_pid_ns(current);
struct bsd_acct_struct *acct;
acct = ns->bacct;
do_acct_process(acct, ns, file);
fput(file);
}
+
+/**
+ * acct_process - now just a wrapper around acct_process_in_ns,
+ * which in turn is a wrapper around do_acct_process.
+ *
+ * handles process accounting for an exiting task
+ */
+void acct_process(void)
+{
+ struct pid_namespace *ns;
+
+ /*
+ * This loop is safe lockless, since current is still
+ * alive and holds its namespace, which in turn holds
+ * its parent.
+ */
+ for (ns = task_active_pid_ns(current); ns != NULL; ns = ns->parent)
+ acct_process_in_ns(ns);
+}