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Subject[patch v8 05/10] task isolation: add hook to task exit
Add task isolation specific hook to task exit routines.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

---
include/linux/task_isolation.h | 11 +++++++++++
kernel/exit.c | 2 ++
kernel/fork.c | 1 +
kernel/task_isolation.c | 4 ++++
4 files changed, 18 insertions(+)

Index: linux-2.6/kernel/exit.c
===================================================================
--- linux-2.6.orig/kernel/exit.c
+++ linux-2.6/kernel/exit.c
@@ -64,6 +64,7 @@
#include <linux/compat.h>
#include <linux/io_uring.h>
#include <linux/kprobes.h>
+#include <linux/task_isolation.h>

#include <linux/uaccess.h>
#include <asm/unistd.h>
@@ -785,6 +786,7 @@ void __noreturn do_exit(long code)
}

io_uring_files_cancel();
+ tsk_isol_exit(tsk);
exit_signals(tsk); /* sets PF_EXITING */

/* sync mm's RSS info before statistics gathering */
Index: linux-2.6/kernel/fork.c
===================================================================
--- linux-2.6.orig/kernel/fork.c
+++ linux-2.6/kernel/fork.c
@@ -2444,6 +2444,7 @@ bad_fork_free_pid:
if (pid != &init_struct_pid)
free_pid(pid);
bad_fork_cleanup_task_isolation:
+ tsk_isol_exit(p);
tsk_isol_free(p);
bad_fork_cleanup_thread:
exit_thread(p);
Index: linux-2.6/kernel/task_isolation.c
===================================================================
--- linux-2.6.orig/kernel/task_isolation.c
+++ linux-2.6/kernel/task_isolation.c
@@ -21,6 +21,10 @@
#include <linux/mm.h>
#include <linux/vmstat.h>

+void __tsk_isol_exit(struct task_struct *tsk)
+{
+}
+
void __tsk_isol_free(struct task_struct *tsk)
{
if (!tsk->isol_info)
Index: linux-2.6/include/linux/task_isolation.h
===================================================================
--- linux-2.6.orig/include/linux/task_isolation.h
+++ linux-2.6/include/linux/task_isolation.h
@@ -27,6 +27,13 @@ static inline void tsk_isol_free(struct
__tsk_isol_free(tsk);
}

+void __tsk_isol_exit(struct task_struct *tsk);
+static inline void tsk_isol_exit(struct task_struct *tsk)
+{
+ if (tsk->isol_info)
+ __tsk_isol_exit(tsk);
+}
+
int prctl_task_isolation_feat_get(unsigned long arg2, unsigned long arg3,
unsigned long arg4, unsigned long arg5);
int prctl_task_isolation_cfg_get(unsigned long arg2, unsigned long arg3,
@@ -57,6 +64,10 @@ static inline void tsk_isol_free(struct
{
}

+static inline void tsk_isol_exit(struct task_struct *tsk)
+{
+}
+
static inline int prctl_task_isolation_feat_get(unsigned long arg2,
unsigned long arg3,
unsigned long arg4,

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