linux-kernel - [PATCH -next 22/27] tty: Document hangup call tree

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1413491125-20134-23-git-send-email-peter@hurleysoftware.com>
Date:	Thu, 16 Oct 2014 16:25:20 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, Jiri Slaby <jslaby@...e.cz>,
	linux-serial@...r.kernel.org,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH -next 22/27] tty: Document hangup call tree

Add at-a-glance call tree for the various hangup methods.

Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
 drivers/tty/tty_io.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 25e85b0..8effd44 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -664,6 +664,19 @@ static int tty_signal_session_leader(struct tty_struct *tty, int exit_session)
  *		  termios_rwsem resetting termios data
  *		  tasklist_lock to walk task list for hangup event
  *		    ->siglock to protect ->signal/->sighand
+ *
+ *	Call tree:
+ *	tty_hangup() =>	do_tty_hangup() -+
+ *					 |
+ *	tty_vhangup() ---------+	 |
+ *	tty_vhangup_self() ----+	 |
+ *	tty_vhangup_session() -+---------+
+ *      				 |
+ *				  __tty_hangup() -> __tty_hangup_standard() -+
+ *									     |
+ *      tty_vhangup_slave() ----> __tty_hangup() -> __tty_vhangup_slave() ---+
+ *									     |
+ *								 __tty_hangup_common()
  */
 static void __tty_hangup_common(struct tty_struct *tty, int exit_session)
 {
-- 
2.1.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/