TOMOYO: Add garbage collector.

This patch adds garbage collector support to TOMOYO.
Elements are protected by "struct srcu_struct tomoyo_ss".

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 634f7449e8ba..3a36b56a2f5c 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -1067,7 +1067,7 @@ static int tomoyo_read_profile(struct tomoyo_io_buffer *head)
  *
  * # cat /sys/kernel/security/tomoyo/manager
  */
-static LIST_HEAD(tomoyo_policy_manager_list);
+LIST_HEAD(tomoyo_policy_manager_list);
 
 /**
  * tomoyo_update_manager_entry - Add a manager entry.
@@ -2109,6 +2109,7 @@ static int tomoyo_write_control(struct file *file, const char __user *buffer,
 static int tomoyo_close_control(struct file *file)
 {
         struct tomoyo_io_buffer *head = file->private_data;
+        const bool is_write = !!head->write_buf;
 
         tomoyo_read_unlock(head->reader_idx);
         /* Release memory used for policy I/O. */
@@ -2119,6 +2120,8 @@ static int tomoyo_close_control(struct file *file)
         kfree(head);
         head = NULL;
         file->private_data = NULL;
+        if (is_write)
+                tomoyo_run_gc();
         return 0;
 }