* [PATCH 1/3] tty: pty - Move TIOCPKT handling into pty.c
2012-10-24 19:43 [PATCH 0/3] TTY -- Add get- ioctls to fetch tty status v3 Cyrill Gorcunov
@ 2012-10-24 19:43 ` Cyrill Gorcunov
2012-10-24 19:43 ` [PATCH 2/3] tty, ioctls -- Add new ioctl definitions for tty flags fetching Cyrill Gorcunov
2012-10-24 19:43 ` [PATCH 3/3] tty: Add get- ioctls to fetch tty status v3 Cyrill Gorcunov
2 siblings, 0 replies; 4+ messages in thread
From: Cyrill Gorcunov @ 2012-10-24 19:43 UTC (permalink / raw)
To: Greg KH; +Cc: linux-kernel, alan, hpa, xemul, jslaby, Cyrill Gorcunov
From: Cyrill Gorcunov <gorcunov@openvz.org>
Since this ioctl is for pty devices only move it to pty.c.
v2:
- drop PTY_TYPE_MASTER test since it's master peer
ioctl anyway (by jslaby@)
Suggested-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
CC: "H. Peter Anvin" <hpa@zytor.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: Pavel Emelyanov <xemul@parallels.com>
CC: Jiri Slaby <jslaby@suse.cz>
---
drivers/tty/pty.c | 26 ++++++++++++++++++++++++++
drivers/tty/tty_ioctl.c | 21 ---------------------
2 files changed, 26 insertions(+), 21 deletions(-)
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 4219f04..df3c642 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -171,6 +171,28 @@ static int pty_set_lock(struct tty_struct *tty, int __user *arg)
return 0;
}
+/* Set the packet mode on a pty */
+static int pty_set_pktmode(struct tty_struct *tty, int __user *arg)
+{
+ unsigned long flags;
+ int pktmode;
+
+ if (get_user(pktmode, arg))
+ return -EFAULT;
+
+ spin_lock_irqsave(&tty->ctrl_lock, flags);
+ if (pktmode) {
+ if (!tty->packet) {
+ tty->packet = 1;
+ tty->link->ctrl_status = 0;
+ }
+ } else
+ tty->packet = 0;
+ spin_unlock_irqrestore(&tty->ctrl_lock, flags);
+
+ return 0;
+}
+
/* Send a signal to the slave */
static int pty_signal(struct tty_struct *tty, int sig)
{
@@ -398,6 +420,8 @@ static int pty_bsd_ioctl(struct tty_struct *tty,
switch (cmd) {
case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */
return pty_set_lock(tty, (int __user *) arg);
+ case TIOCPKT: /* Set PT packet mode */
+ return pty_set_pktmode(tty, (int __user *)arg);
case TIOCSIG: /* Send signal to other side of pty */
return pty_signal(tty, (int) arg);
}
@@ -512,6 +536,8 @@ static int pty_unix98_ioctl(struct tty_struct *tty,
switch (cmd) {
case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */
return pty_set_lock(tty, (int __user *)arg);
+ case TIOCPKT: /* Set PT packet mode */
+ return pty_set_pktmode(tty, (int __user *)arg);
case TIOCGPTN: /* Get PT Number */
return put_user(tty->index, (unsigned int __user *)arg);
case TIOCSIG: /* Send signal to other side of pty */
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 12b1fa0..8481b29 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -1118,7 +1118,6 @@ EXPORT_SYMBOL_GPL(tty_perform_flush);
int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
- unsigned long flags;
int retval;
switch (cmd) {
@@ -1153,26 +1152,6 @@ int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
return 0;
case TCFLSH:
return tty_perform_flush(tty, arg);
- case TIOCPKT:
- {
- int pktmode;
-
- if (tty->driver->type != TTY_DRIVER_TYPE_PTY ||
- tty->driver->subtype != PTY_TYPE_MASTER)
- return -ENOTTY;
- if (get_user(pktmode, (int __user *) arg))
- return -EFAULT;
- spin_lock_irqsave(&tty->ctrl_lock, flags);
- if (pktmode) {
- if (!tty->packet) {
- tty->packet = 1;
- tty->link->ctrl_status = 0;
- }
- } else
- tty->packet = 0;
- spin_unlock_irqrestore(&tty->ctrl_lock, flags);
- return 0;
- }
default:
/* Try the mode commands */
return tty_mode_ioctl(tty, file, cmd, arg);
--
1.7.7.6
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH 2/3] tty, ioctls -- Add new ioctl definitions for tty flags fetching
2012-10-24 19:43 [PATCH 0/3] TTY -- Add get- ioctls to fetch tty status v3 Cyrill Gorcunov
2012-10-24 19:43 ` [PATCH 1/3] tty: pty - Move TIOCPKT handling into pty.c Cyrill Gorcunov
@ 2012-10-24 19:43 ` Cyrill Gorcunov
2012-10-24 19:43 ` [PATCH 3/3] tty: Add get- ioctls to fetch tty status v3 Cyrill Gorcunov
2 siblings, 0 replies; 4+ messages in thread
From: Cyrill Gorcunov @ 2012-10-24 19:43 UTC (permalink / raw)
To: Greg KH; +Cc: linux-kernel, alan, hpa, xemul, jslaby, Cyrill Gorcunov
From: Cyrill Gorcunov <gorcunov@openvz.org>
This patch defines new ioctl codes TIOCGPKT, TIOCGPTLCK,
TIOCGEXCL for fetching pty's packet mode and locking state,
and exclusive mode of tty.
[ No real handlers for the codes though, this will be
addressed in another patch for easier review and
bisectability ]
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
CC: Alan Cox <alan@lxorguk.ukuu.org.uk>
CC: "H. Peter Anvin" <hpa@zytor.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: Pavel Emelyanov <xemul@parallels.com>
CC: Jiri Slaby <jslaby@suse.cz>
---
arch/alpha/include/asm/ioctls.h | 3 +++
arch/mips/include/uapi/asm/ioctls.h | 3 +++
arch/parisc/include/uapi/asm/ioctls.h | 3 +++
arch/powerpc/include/uapi/asm/ioctls.h | 3 +++
arch/sh/include/uapi/asm/ioctls.h | 3 +++
arch/sparc/include/uapi/asm/ioctls.h | 3 +++
arch/xtensa/include/uapi/asm/ioctls.h | 3 +++
fs/compat_ioctl.c | 3 +++
include/uapi/asm-generic/ioctls.h | 3 +++
9 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/arch/alpha/include/asm/ioctls.h b/arch/alpha/include/asm/ioctls.h
index 80e1cee..92c557b 100644
--- a/arch/alpha/include/asm/ioctls.h
+++ b/arch/alpha/include/asm/ioctls.h
@@ -95,6 +95,9 @@
#define TIOCGDEV _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */
#define TIOCVHANGUP 0x5437
+#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCSERCONFIG 0x5453
#define TIOCSERGWILD 0x5454
diff --git a/arch/mips/include/uapi/asm/ioctls.h b/arch/mips/include/uapi/asm/ioctls.h
index 92403c3..addd56b 100644
--- a/arch/mips/include/uapi/asm/ioctls.h
+++ b/arch/mips/include/uapi/asm/ioctls.h
@@ -86,6 +86,9 @@
#define TIOCGDEV _IOR('T', 0x32, unsigned int) /* Get primary device node of /dev/console */
#define TIOCSIG _IOW('T', 0x36, int) /* Generate signal on Pty slave */
#define TIOCVHANGUP 0x5437
+#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
/* I hope the range from 0x5480 on is free ... */
#define TIOCSCTTY 0x5480 /* become controlling tty */
diff --git a/arch/parisc/include/uapi/asm/ioctls.h b/arch/parisc/include/uapi/asm/ioctls.h
index 054ec06..66719c3 100644
--- a/arch/parisc/include/uapi/asm/ioctls.h
+++ b/arch/parisc/include/uapi/asm/ioctls.h
@@ -55,6 +55,9 @@
#define TIOCGDEV _IOR('T',0x32, int) /* Get primary device node of /dev/console */
#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */
#define TIOCVHANGUP 0x5437
+#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define FIONCLEX 0x5450 /* these numbers need to be adjusted. */
#define FIOCLEX 0x5451
diff --git a/arch/powerpc/include/uapi/asm/ioctls.h b/arch/powerpc/include/uapi/asm/ioctls.h
index e9b7887..49a2579 100644
--- a/arch/powerpc/include/uapi/asm/ioctls.h
+++ b/arch/powerpc/include/uapi/asm/ioctls.h
@@ -97,6 +97,9 @@
#define TIOCGDEV _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */
#define TIOCVHANGUP 0x5437
+#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCSERCONFIG 0x5453
#define TIOCSERGWILD 0x5454
diff --git a/arch/sh/include/uapi/asm/ioctls.h b/arch/sh/include/uapi/asm/ioctls.h
index a6769f3..3422410 100644
--- a/arch/sh/include/uapi/asm/ioctls.h
+++ b/arch/sh/include/uapi/asm/ioctls.h
@@ -88,6 +88,9 @@
#define TIOCGDEV _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */
#define TIOCVHANGUP _IO('T', 0x37)
+#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCSERCONFIG _IO('T', 83) /* 0x5453 */
#define TIOCSERGWILD _IOR('T', 84, int) /* 0x5454 */
diff --git a/arch/sparc/include/uapi/asm/ioctls.h b/arch/sparc/include/uapi/asm/ioctls.h
index 9155f70..897d172 100644
--- a/arch/sparc/include/uapi/asm/ioctls.h
+++ b/arch/sparc/include/uapi/asm/ioctls.h
@@ -21,6 +21,9 @@
#define TCSETSF2 _IOW('T', 15, struct termios2)
#define TIOCGDEV _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
#define TIOCVHANGUP _IO('T', 0x37)
+#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
/* Note that all the ioctls that are not available in Linux have a
* double underscore on the front to: a) avoid some programs to
diff --git a/arch/xtensa/include/uapi/asm/ioctls.h b/arch/xtensa/include/uapi/asm/ioctls.h
index 2aa4cd9..b4cb110 100644
--- a/arch/xtensa/include/uapi/asm/ioctls.h
+++ b/arch/xtensa/include/uapi/asm/ioctls.h
@@ -101,6 +101,9 @@
#define TIOCGDEV _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */
#define TIOCVHANGUP _IO('T', 0x37)
+#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCSERCONFIG _IO('T', 83)
#define TIOCSERGWILD _IOR('T', 84, int)
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index f505402..89cf601 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -842,6 +842,9 @@ COMPATIBLE_IOCTL(TIOCGDEV)
COMPATIBLE_IOCTL(TIOCCBRK)
COMPATIBLE_IOCTL(TIOCGSID)
COMPATIBLE_IOCTL(TIOCGICOUNT)
+COMPATIBLE_IOCTL(TIOCGPKT)
+COMPATIBLE_IOCTL(TIOCGPTLCK)
+COMPATIBLE_IOCTL(TIOCGEXCL)
/* Little t */
COMPATIBLE_IOCTL(TIOCGETD)
COMPATIBLE_IOCTL(TIOCSETD)
diff --git a/include/uapi/asm-generic/ioctls.h b/include/uapi/asm-generic/ioctls.h
index 199975f..143dacb 100644
--- a/include/uapi/asm-generic/ioctls.h
+++ b/include/uapi/asm-generic/ioctls.h
@@ -74,6 +74,9 @@
#define TCSETXW 0x5435
#define TIOCSIG _IOW('T', 0x36, int) /* pty: generate signal */
#define TIOCVHANGUP 0x5437
+#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define FIONCLEX 0x5450
#define FIOCLEX 0x5451
--
1.7.7.6
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH 3/3] tty: Add get- ioctls to fetch tty status v3
2012-10-24 19:43 [PATCH 0/3] TTY -- Add get- ioctls to fetch tty status v3 Cyrill Gorcunov
2012-10-24 19:43 ` [PATCH 1/3] tty: pty - Move TIOCPKT handling into pty.c Cyrill Gorcunov
2012-10-24 19:43 ` [PATCH 2/3] tty, ioctls -- Add new ioctl definitions for tty flags fetching Cyrill Gorcunov
@ 2012-10-24 19:43 ` Cyrill Gorcunov
2 siblings, 0 replies; 4+ messages in thread
From: Cyrill Gorcunov @ 2012-10-24 19:43 UTC (permalink / raw)
To: Greg KH; +Cc: linux-kernel, alan, hpa, xemul, jslaby, Cyrill Gorcunov
From: Cyrill Gorcunov <gorcunov@openvz.org>
For checkpoint/restore we need to know if tty has
exclusive or packet mode set, as well as if pty
is currently locked. Just to be able to restore
this characteristics.
For this sake the following ioctl codes are introduced
- TIOCGPKT to get packet mode state
- TIOCGPTLCK to get Pty locked state
- TIOCGEXCL to get Exclusive mode state
Note this ioctls are a bit unsafe in terms of data
obtained consistency. The tty characteristics might
be changed right after ioctl complete. Keep it in
mind and use this ioctl carefully.
v2:
- Use TIOC prefix for ioctl codes (by jslaby@)
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
CC: Alan Cox <alan@lxorguk.ukuu.org.uk>
CC: "H. Peter Anvin" <hpa@zytor.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: Pavel Emelyanov <xemul@parallels.com>
CC: Jiri Slaby <jslaby@suse.cz>
---
drivers/tty/pty.c | 21 +++++++++++++++++++++
drivers/tty/tty_io.c | 5 +++++
2 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index df3c642..0ce0b3e 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -171,6 +171,12 @@ static int pty_set_lock(struct tty_struct *tty, int __user *arg)
return 0;
}
+static int pty_get_lock(struct tty_struct *tty, int __user *arg)
+{
+ int locked = test_bit(TTY_PTY_LOCK, &tty->flags);
+ return put_user(locked, arg);
+}
+
/* Set the packet mode on a pty */
static int pty_set_pktmode(struct tty_struct *tty, int __user *arg)
{
@@ -193,6 +199,13 @@ static int pty_set_pktmode(struct tty_struct *tty, int __user *arg)
return 0;
}
+/* Get the packet mode of a pty */
+static int pty_get_pktmode(struct tty_struct *tty, int __user *arg)
+{
+ int pktmode = tty->packet;
+ return put_user(pktmode, arg);
+}
+
/* Send a signal to the slave */
static int pty_signal(struct tty_struct *tty, int sig)
{
@@ -420,8 +433,12 @@ static int pty_bsd_ioctl(struct tty_struct *tty,
switch (cmd) {
case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */
return pty_set_lock(tty, (int __user *) arg);
+ case TIOCGPTLCK: /* Get PT Lock status */
+ return pty_get_lock(tty, (int __user *)arg);
case TIOCPKT: /* Set PT packet mode */
return pty_set_pktmode(tty, (int __user *)arg);
+ case TIOCGPKT: /* Get PT packet mode */
+ return pty_get_pktmode(tty, (int __user *)arg);
case TIOCSIG: /* Send signal to other side of pty */
return pty_signal(tty, (int) arg);
}
@@ -536,8 +553,12 @@ static int pty_unix98_ioctl(struct tty_struct *tty,
switch (cmd) {
case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */
return pty_set_lock(tty, (int __user *)arg);
+ case TIOCGPTLCK: /* Get PT Lock status */
+ return pty_get_lock(tty, (int __user *)arg);
case TIOCPKT: /* Set PT packet mode */
return pty_set_pktmode(tty, (int __user *)arg);
+ case TIOCGPKT: /* Get PT packet mode */
+ return pty_get_pktmode(tty, (int __user *)arg);
case TIOCGPTN: /* Get PT Number */
return put_user(tty->index, (unsigned int __user *)arg);
case TIOCSIG: /* Send signal to other side of pty */
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index a3eba7f..739ea86 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2687,6 +2687,11 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case TIOCNXCL:
clear_bit(TTY_EXCLUSIVE, &tty->flags);
return 0;
+ case TIOCGEXCL:
+ {
+ int excl = test_bit(TTY_EXCLUSIVE, &tty->flags);
+ return put_user(excl, (int __user *)p);
+ }
case TIOCNOTTY:
if (current->signal->tty != tty)
return -ENOTTY;
--
1.7.7.6
^ permalink raw reply related [flat|nested] 4+ messages in thread