[RESEND][PATCH 07/15] tty: audit: Combine push functions

From: Peter Hurley
Date: Sun Jan 10 2016 - 00:02:38 EST


tty_audit_push() and tty_audit_push_current() perform identical
tasks; eliminate the tty_audit_push() implementation and the
tty_audit_push_current() name.

Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
---
drivers/tty/tty_audit.c | 35 +++--------------------------------
include/linux/tty.h | 8 ++------
kernel/audit.c | 2 +-
3 files changed, 6 insertions(+), 39 deletions(-)

diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
index 5ae4839..6b82c3c 100644
--- a/drivers/tty/tty_audit.c
+++ b/drivers/tty/tty_audit.c
@@ -172,12 +172,11 @@ void tty_audit_tiocsti(struct tty_struct *tty, char ch)
}

/**
- * tty_audit_push_current - Flush current's pending audit data
+ * tty_audit_push - Flush current's pending audit data
*
- * Try to lock sighand and get a reference to the tty audit buffer if available.
- * Flush the buffer or return an appropriate error code.
+ * Returns 0 if success, -EPERM if tty audit is disabled
*/
-int tty_audit_push_current(void)
+int tty_audit_push(void)
{
struct tty_audit_buf *buf = ERR_PTR(-EPERM);
unsigned long flags;
@@ -309,31 +308,3 @@ void tty_audit_add_data(struct tty_struct *tty, const void *data, size_t size)
mutex_unlock(&buf->mutex);
tty_audit_buf_put(buf);
}
-
-/**
- * tty_audit_push - Push buffered data out
- *
- * Make sure no audit data is pending on the current process.
- */
-void tty_audit_push(void)
-{
- struct tty_audit_buf *buf;
- unsigned long flags;
-
- spin_lock_irqsave(&current->sighand->siglock, flags);
- if (likely(!current->signal->audit_tty)) {
- spin_unlock_irqrestore(&current->sighand->siglock, flags);
- return;
- }
- buf = current->signal->tty_audit_buf;
- if (buf)
- atomic_inc(&buf->count);
- spin_unlock_irqrestore(&current->sighand->siglock, flags);
-
- if (buf) {
- mutex_lock(&buf->mutex);
- tty_audit_buf_push(buf);
- mutex_unlock(&buf->mutex);
- tty_audit_buf_put(buf);
- }
-}
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 21e3722..b17f759 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -608,8 +608,7 @@ extern void tty_audit_add_data(struct tty_struct *tty, const void *data,
extern void tty_audit_exit(void);
extern void tty_audit_fork(struct signal_struct *sig);
extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);
-extern void tty_audit_push(void);
-extern int tty_audit_push_current(void);
+extern int tty_audit_push(void);
#else
static inline void tty_audit_add_data(struct tty_struct *tty, const void *data,
size_t size)
@@ -624,10 +623,7 @@ static inline void tty_audit_exit(void)
static inline void tty_audit_fork(struct signal_struct *sig)
{
}
-static inline void tty_audit_push(struct tty_struct *tty)
-{
-}
-static inline int tty_audit_push_current(void)
+static inline int tty_audit_push(void)
{
return 0;
}
diff --git a/kernel/audit.c b/kernel/audit.c
index 5ffcbd3..270dfb9 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -921,7 +921,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (err == 1) { /* match or error */
err = 0;
if (msg_type == AUDIT_USER_TTY) {
- err = tty_audit_push_current();
+ err = tty_audit_push();
if (err)
break;
}
--
2.7.0