Add an instance parameter devpts interfaces
Pass-in 'inode' or 'tty' parameter to devpts interfaces. With multiple
devpts instances, these parameters will be used in subsequent patches
to identify the instance of devpts mounted. The parameters also help
simplify devpts implementation.
Changelog[v3]:
- minor changes due to merge with ttydev updates
- rename parameters to emphasize they are ptmx or pts inodes
- pass-in tty_struct * to devpts_pty_kill() (this will help
cleanup the get_node() call in a subsequent patch)
Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index c5a192d..a391bad 100644
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -60,7 +60,7 @@
set_bit(TTY_OTHER_CLOSED, &tty->flags);
#ifdef CONFIG_UNIX98_PTYS
if (tty->driver == ptm_driver)
- devpts_pty_kill(tty->index);
+ devpts_pty_kill(tty->link);
#endif
tty_vhangup(tty->link);
}
@@ -453,9 +453,10 @@
* This provides our locking.
*/
-static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver, int idx)
+static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver,
+ struct inode *ptm_inode, int idx)
{
- struct tty_struct *tty = devpts_get_tty(idx);
+ struct tty_struct *tty = devpts_get_tty(ptm_inode, idx);
if (tty)
tty = tty->link;
return tty;
@@ -470,9 +471,10 @@
* This provides our locking.
*/
-static struct tty_struct *pts_unix98_lookup(struct tty_driver *driver, int idx)
+static struct tty_struct *pts_unix98_lookup(struct tty_driver *driver,
+ struct inode *pts_inode, int idx)
{
- struct tty_struct *tty = devpts_get_tty(idx);
+ struct tty_struct *tty = devpts_get_tty(pts_inode, idx);
/* Master must be open before slave */
if (!tty)
return ERR_PTR(-EIO);
@@ -602,7 +604,7 @@
nonseekable_open(inode, filp);
/* find a device that is not in use. */
- index = devpts_new_index();
+ index = devpts_new_index(inode);
if (index < 0)
return index;
@@ -619,7 +621,7 @@
filp->private_data = tty;
file_move(filp, &tty->tty_files);
- retval = devpts_pty_new(tty->link);
+ retval = devpts_pty_new(inode, tty->link);
if (retval)
goto out1;
@@ -630,7 +632,7 @@
tty_release_dev(filp);
return retval;
out:
- devpts_kill_index(index);
+ devpts_kill_index(inode, index);
return retval;
}