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path: root/drivers/tty/pty.c
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Diffstat (limited to 'drivers/tty/pty.c')
-rw-r--r--drivers/tty/pty.c89
1 files changed, 36 insertions, 53 deletions
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 9b5d4ae5d8f2..74bfabe5b453 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -57,9 +57,9 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
set_bit(TTY_IO_ERROR, &tty->flags);
wake_up_interruptible(&tty->read_wait);
wake_up_interruptible(&tty->write_wait);
- spin_lock_irq(&tty->ctrl_lock);
- tty->packet = 0;
- spin_unlock_irq(&tty->ctrl_lock);
+ spin_lock_irq(&tty->ctrl.lock);
+ tty->ctrl.packet = false;
+ spin_unlock_irq(&tty->ctrl.lock);
/* Review - krefs on tty_link ?? */
if (!tty->link)
return;
@@ -113,7 +113,7 @@ static int pty_write(struct tty_struct *tty, const unsigned char *buf, int c)
struct tty_struct *to = tty->link;
unsigned long flags;
- if (tty->stopped)
+ if (tty->flow.stopped)
return 0;
if (c > 0) {
@@ -136,26 +136,13 @@ static int pty_write(struct tty_struct *tty, const unsigned char *buf, int c)
* the other device.
*/
-static int pty_write_room(struct tty_struct *tty)
+static unsigned int pty_write_room(struct tty_struct *tty)
{
- if (tty->stopped)
+ if (tty->flow.stopped)
return 0;
return tty_buffer_space_avail(tty->link->port);
}
-/**
- * pty_chars_in_buffer - characters currently in our tx queue
- * @tty: our tty
- *
- * Report how much we have in the transmit queue. As everything is
- * instantly at the other end this is easy to implement.
- */
-
-static int pty_chars_in_buffer(struct tty_struct *tty)
-{
- return 0;
-}
-
/* Set the lock flag on a pty */
static int pty_set_lock(struct tty_struct *tty, int __user *arg)
{
@@ -185,16 +172,16 @@ static int pty_set_pktmode(struct tty_struct *tty, int __user *arg)
if (get_user(pktmode, arg))
return -EFAULT;
- spin_lock_irq(&tty->ctrl_lock);
+ spin_lock_irq(&tty->ctrl.lock);
if (pktmode) {
- if (!tty->packet) {
- tty->link->ctrl_status = 0;
+ if (!tty->ctrl.packet) {
+ tty->link->ctrl.pktstatus = 0;
smp_mb();
- tty->packet = 1;
+ tty->ctrl.packet = true;
}
} else
- tty->packet = 0;
- spin_unlock_irq(&tty->ctrl_lock);
+ tty->ctrl.packet = false;
+ spin_unlock_irq(&tty->ctrl.lock);
return 0;
}
@@ -202,7 +189,7 @@ static int pty_set_pktmode(struct tty_struct *tty, int __user *arg)
/* Get the packet mode of a pty */
static int pty_get_pktmode(struct tty_struct *tty, int __user *arg)
{
- int pktmode = tty->packet;
+ int pktmode = tty->ctrl.packet;
return put_user(pktmode, arg);
}
@@ -232,11 +219,11 @@ static void pty_flush_buffer(struct tty_struct *tty)
return;
tty_buffer_flush(to, NULL);
- if (to->packet) {
- spin_lock_irq(&tty->ctrl_lock);
- tty->ctrl_status |= TIOCPKT_FLUSHWRITE;
+ if (to->ctrl.packet) {
+ spin_lock_irq(&tty->ctrl.lock);
+ tty->ctrl.pktstatus |= TIOCPKT_FLUSHWRITE;
wake_up_interruptible(&to->read_wait);
- spin_unlock_irq(&tty->ctrl_lock);
+ spin_unlock_irq(&tty->ctrl.lock);
}
}
@@ -266,7 +253,7 @@ static void pty_set_termios(struct tty_struct *tty,
struct ktermios *old_termios)
{
/* See if packet mode change of state. */
- if (tty->link && tty->link->packet) {
+ if (tty->link && tty->link->ctrl.packet) {
int extproc = (old_termios->c_lflag & EXTPROC) | L_EXTPROC(tty);
int old_flow = ((old_termios->c_iflag & IXON) &&
(old_termios->c_cc[VSTOP] == '\023') &&
@@ -275,17 +262,17 @@ static void pty_set_termios(struct tty_struct *tty,
STOP_CHAR(tty) == '\023' &&
START_CHAR(tty) == '\021');
if ((old_flow != new_flow) || extproc) {
- spin_lock_irq(&tty->ctrl_lock);
+ spin_lock_irq(&tty->ctrl.lock);
if (old_flow != new_flow) {
- tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP);
+ tty->ctrl.pktstatus &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP);
if (new_flow)
- tty->ctrl_status |= TIOCPKT_DOSTOP;
+ tty->ctrl.pktstatus |= TIOCPKT_DOSTOP;
else
- tty->ctrl_status |= TIOCPKT_NOSTOP;
+ tty->ctrl.pktstatus |= TIOCPKT_NOSTOP;
}
if (extproc)
- tty->ctrl_status |= TIOCPKT_IOCTL;
- spin_unlock_irq(&tty->ctrl_lock);
+ tty->ctrl.pktstatus |= TIOCPKT_IOCTL;
+ spin_unlock_irq(&tty->ctrl.lock);
wake_up_interruptible(&tty->link->read_wait);
}
}
@@ -295,7 +282,7 @@ static void pty_set_termios(struct tty_struct *tty,
}
/**
- * pty_do_resize - resize event
+ * pty_resize - resize event
* @tty: tty being resized
* @ws: window size being set.
*
@@ -346,11 +333,11 @@ static void pty_start(struct tty_struct *tty)
{
unsigned long flags;
- if (tty->link && tty->link->packet) {
- spin_lock_irqsave(&tty->ctrl_lock, flags);
- tty->ctrl_status &= ~TIOCPKT_STOP;
- tty->ctrl_status |= TIOCPKT_START;
- spin_unlock_irqrestore(&tty->ctrl_lock, flags);
+ if (tty->link && tty->link->ctrl.packet) {
+ spin_lock_irqsave(&tty->ctrl.lock, flags);
+ tty->ctrl.pktstatus &= ~TIOCPKT_STOP;
+ tty->ctrl.pktstatus |= TIOCPKT_START;
+ spin_unlock_irqrestore(&tty->ctrl.lock, flags);
wake_up_interruptible_poll(&tty->link->read_wait, EPOLLIN);
}
}
@@ -359,11 +346,11 @@ static void pty_stop(struct tty_struct *tty)
{
unsigned long flags;
- if (tty->link && tty->link->packet) {
- spin_lock_irqsave(&tty->ctrl_lock, flags);
- tty->ctrl_status &= ~TIOCPKT_START;
- tty->ctrl_status |= TIOCPKT_STOP;
- spin_unlock_irqrestore(&tty->ctrl_lock, flags);
+ if (tty->link && tty->link->ctrl.packet) {
+ spin_lock_irqsave(&tty->ctrl.lock, flags);
+ tty->ctrl.pktstatus &= ~TIOCPKT_START;
+ tty->ctrl.pktstatus |= TIOCPKT_STOP;
+ spin_unlock_irqrestore(&tty->ctrl.lock, flags);
wake_up_interruptible_poll(&tty->link->read_wait, EPOLLIN);
}
}
@@ -525,7 +512,6 @@ static const struct tty_operations master_pty_ops_bsd = {
.write = pty_write,
.write_room = pty_write_room,
.flush_buffer = pty_flush_buffer,
- .chars_in_buffer = pty_chars_in_buffer,
.unthrottle = pty_unthrottle,
.ioctl = pty_bsd_ioctl,
.compat_ioctl = pty_bsd_compat_ioctl,
@@ -541,7 +527,6 @@ static const struct tty_operations slave_pty_ops_bsd = {
.write = pty_write,
.write_room = pty_write_room,
.flush_buffer = pty_flush_buffer,
- .chars_in_buffer = pty_chars_in_buffer,
.unthrottle = pty_unthrottle,
.set_termios = pty_set_termios,
.cleanup = pty_cleanup,
@@ -626,7 +611,7 @@ static struct cdev ptmx_cdev;
*/
int ptm_open_peer(struct file *master, struct tty_struct *tty, int flags)
{
- int fd = -1;
+ int fd;
struct file *filp;
int retval = -EINVAL;
struct path path;
@@ -776,7 +761,6 @@ static const struct tty_operations ptm_unix98_ops = {
.write = pty_write,
.write_room = pty_write_room,
.flush_buffer = pty_flush_buffer,
- .chars_in_buffer = pty_chars_in_buffer,
.unthrottle = pty_unthrottle,
.ioctl = pty_unix98_ioctl,
.compat_ioctl = pty_unix98_compat_ioctl,
@@ -794,7 +778,6 @@ static const struct tty_operations pty_unix98_ops = {
.write = pty_write,
.write_room = pty_write_room,
.flush_buffer = pty_flush_buffer,
- .chars_in_buffer = pty_chars_in_buffer,
.unthrottle = pty_unthrottle,
.set_termios = pty_set_termios,
.start = pty_start,
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-26 02:04:52 +0000