#include <linux/selection.h>
#include <linux/kmod.h>
-#include <linux/vs_cvirt.h>
+#include <linux/vs_pid.h>
#undef TTY_DEBUG_HANGUP
#define TTY_PARANOIA_CHECK 1
#define CHECK_TTY_COUNT 1
-struct termios tty_std_termios = { /* for the benefit of tty drivers */
+struct ktermios tty_std_termios = { /* for the benefit of tty drivers */
.c_iflag = ICRNL | IXON,
.c_oflag = OPOST | ONLCR,
.c_cflag = B38400 | CS8 | CREAD | HUPCL,
.c_lflag = ISIG | ICANON | ECHO | ECHOE | ECHOK |
ECHOCTL | ECHOKE | IEXTEN,
- .c_cc = INIT_C_CC
+ .c_cc = INIT_C_CC,
+ .c_ispeed = 38400,
+ .c_ospeed = 38400
};
EXPORT_SYMBOL(tty_std_termios);
{
kfree(tty->write_buf);
tty_buffer_free_all(tty);
+ memset(tty, 0xDEADDEAD, sizeof(struct tty_struct));
kfree(tty);
}
}
EXPORT_SYMBOL_GPL(tty_ldisc_flush);
+
+/**
+ * tty_reset_termios - reset terminal state
+ * @tty: tty to reset
+ *
+ * Restore a terminal to the driver default state
+ */
+
+static void tty_reset_termios(struct tty_struct *tty)
+{
+ mutex_lock(&tty->termios_mutex);
+ *tty->termios = tty->driver->init_termios;
+ tty->termios->c_ispeed = tty_termios_input_baud_rate(tty->termios);
+ tty->termios->c_ospeed = tty_termios_baud_rate(tty->termios);
+ mutex_unlock(&tty->termios_mutex);
+}
/**
* do_tty_hangup - actual handler for hangup events
- * @data: tty device
+ * @work: tty device
*
* This can be called by the "eventd" kernel thread. That is process
* synchronous but doesn't hold any locks, so we need to make sure we
* tasklist_lock to walk task list for hangup event
* ->siglock to protect ->signal/->sighand
*/
-static void do_tty_hangup(void *data)
+static void do_tty_hangup(struct work_struct *work)
{
- struct tty_struct *tty = (struct tty_struct *) data;
+ struct tty_struct *tty =
+ container_of(work, struct tty_struct, hangup_work);
struct file * cons_filp = NULL;
struct file *filp, *f = NULL;
struct task_struct *p;
* N_TTY.
*/
if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)
- {
- mutex_lock(&tty->termios_mutex);
- *tty->termios = tty->driver->init_termios;
- mutex_unlock(&tty->termios_mutex);
- }
+ tty_reset_termios(tty);
/* Defer ldisc switch */
/* tty_deferred_ldisc_switch(N_TTY);
printk(KERN_DEBUG "%s vhangup...\n", tty_name(tty, buf));
#endif
- do_tty_hangup((void *) tty);
+ do_tty_hangup(&tty->hangup_work);
}
EXPORT_SYMBOL(tty_vhangup);
spin_lock_irq(¤t->sighand->siglock);
current->signal->tty_old_pgrp = 0;
- session = current->signal->session;
+ session = process_session(current);
spin_unlock_irq(¤t->sighand->siglock);
mutex_lock(&tty_mutex);
struct tty_ldisc *ld;
tty = (struct tty_struct *)file->private_data;
- inode = file->f_dentry->d_inode;
+ inode = file->f_path.dentry->d_inode;
if (tty_paranoia_check(tty, inode, "tty_read"))
return -EIO;
if (!tty || (test_bit(TTY_IO_ERROR, &tty->flags)))
cond_resched();
}
if (written) {
- struct inode *inode = file->f_dentry->d_inode;
+ struct inode *inode = file->f_path.dentry->d_inode;
inode->i_mtime = current_fs_time(inode->i_sb);
ret = written;
}
loff_t *ppos)
{
struct tty_struct * tty;
- struct inode *inode = file->f_dentry->d_inode;
+ struct inode *inode = file->f_path.dentry->d_inode;
ssize_t ret;
struct tty_ldisc *ld;
struct tty_struct **ret_tty)
{
struct tty_struct *tty, *o_tty;
- struct termios *tp, **tp_loc, *o_tp, **o_tp_loc;
- struct termios *ltp, **ltp_loc, *o_ltp, **o_ltp_loc;
+ struct ktermios *tp, **tp_loc, *o_tp, **o_tp_loc;
+ struct ktermios *ltp, **ltp_loc, *o_ltp, **o_ltp_loc;
int retval = 0;
/* check whether we're reopening an existing tty */
if (driver->flags & TTY_DRIVER_DEVPTS_MEM) {
tty = devpts_get_tty(idx);
+ /*
+ * If we don't have a tty here on a slave open, it's because
+ * the master already started the close process and there's
+ * no relation between devpts file and tty anymore.
+ */
+ if (!tty && driver->subtype == PTY_TYPE_SLAVE) {
+ retval = -EIO;
+ goto end_init;
+ }
+ /*
+ * It's safe from now on because init_dev() is called with
+ * tty_mutex held and release_dev() won't change tty->count
+ * or tty->flags without having to grab tty_mutex
+ */
if (tty && driver->subtype == PTY_TYPE_MASTER)
tty = tty->link;
} else {
}
if (!*tp_loc) {
- tp = (struct termios *) kmalloc(sizeof(struct termios),
+ tp = (struct ktermios *) kmalloc(sizeof(struct ktermios),
GFP_KERNEL);
if (!tp)
goto free_mem_out;
}
if (!*ltp_loc) {
- ltp = (struct termios *) kmalloc(sizeof(struct termios),
+ ltp = (struct ktermios *) kmalloc(sizeof(struct ktermios),
GFP_KERNEL);
if (!ltp)
goto free_mem_out;
- memset(ltp, 0, sizeof(struct termios));
+ memset(ltp, 0, sizeof(struct ktermios));
}
if (driver->type == TTY_DRIVER_TYPE_PTY) {
}
if (!*o_tp_loc) {
- o_tp = (struct termios *)
- kmalloc(sizeof(struct termios), GFP_KERNEL);
+ o_tp = (struct ktermios *)
+ kmalloc(sizeof(struct ktermios), GFP_KERNEL);
if (!o_tp)
goto free_mem_out;
*o_tp = driver->other->init_termios;
}
if (!*o_ltp_loc) {
- o_ltp = (struct termios *)
- kmalloc(sizeof(struct termios), GFP_KERNEL);
+ o_ltp = (struct ktermios *)
+ kmalloc(sizeof(struct ktermios), GFP_KERNEL);
if (!o_ltp)
goto free_mem_out;
- memset(o_ltp, 0, sizeof(struct termios));
+ memset(o_ltp, 0, sizeof(struct ktermios));
}
/*
*ltp_loc = ltp;
tty->termios = *tp_loc;
tty->termios_locked = *ltp_loc;
+ /* Compatibility until drivers always set this */
+ tty->termios->c_ispeed = tty_termios_input_baud_rate(tty->termios);
+ tty->termios->c_ospeed = tty_termios_baud_rate(tty->termios);
driver->refcount++;
tty->count++;
/* call the tty release_mem routine to clean out this slot */
release_mem_out:
- printk(KERN_INFO "init_dev: ldisc open failed, "
- "clearing slot %d\n", idx);
+ if (printk_ratelimit())
+ printk(KERN_INFO "init_dev: ldisc open failed, "
+ "clearing slot %d\n", idx);
release_mem(tty, idx);
goto end_init;
}
static void release_mem(struct tty_struct *tty, int idx)
{
struct tty_struct *o_tty;
- struct termios *tp;
+ struct ktermios *tp;
int devpts = tty->driver->flags & TTY_DRIVER_DEVPTS_MEM;
if ((o_tty = tty->link) != NULL) {
unsigned long flags;
tty = (struct tty_struct *)filp->private_data;
- if (tty_paranoia_check(tty, filp->f_dentry->d_inode, "release_dev"))
+ if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "release_dev"))
return;
check_tty_count(tty, "release_dev");
int ret = 0;
tty = (struct tty_struct *)filp->private_data;
- if (tty_paranoia_check(tty, filp->f_dentry->d_inode, "tty_poll"))
+ if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_poll"))
return 0;
ld = tty_ldisc_ref_wait(tty);
int retval;
tty = (struct tty_struct *)filp->private_data;
- if (tty_paranoia_check(tty, filp->f_dentry->d_inode, "tty_fasync"))
+ if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_fasync"))
return 0;
retval = fasync_helper(fd, filp, on, &tty->fasync);
{
int ret = 0;
if (current->signal->leader &&
- (current->signal->session == tty->session))
+ (process_session(current) == tty->session))
return ret;
mutex_lock(&tty_mutex);
return retval;
if (!current->signal->tty ||
(current->signal->tty != real_tty) ||
- (real_tty->session != current->signal->session))
+ (real_tty->session != process_session(current)))
return -ENOTTY;
if (get_user(pgrp, p))
return -EFAULT;
pgrp = vx_rmap_pid(pgrp);
if (pgrp < 0)
return -EINVAL;
- if (session_of_pgrp(pgrp) != current->signal->session)
+ if (session_of_pgrp(pgrp) != process_session(current))
return -EPERM;
real_tty->pgrp = pgrp;
return 0;
* Nasty bug: do_SAK is being called in interrupt context. This can
* deadlock. We punt it up to process context. AKPM - 16Mar2001
*/
-static void __do_SAK(void *arg)
+static void __do_SAK(struct work_struct *work)
{
+ struct tty_struct *tty =
+ container_of(work, struct tty_struct, SAK_work);
#ifdef TTY_SOFT_SAK
tty_hangup(tty);
#else
- struct tty_struct *tty = arg;
struct task_struct *g, *p;
int session;
int i;
struct file *filp;
- struct tty_ldisc *disc;
struct fdtable *fdt;
if (!tty)
return;
session = tty->session;
- /* We don't want an ldisc switch during this */
- disc = tty_ldisc_ref(tty);
- if (disc && disc->flush_buffer)
- disc->flush_buffer(tty);
- tty_ldisc_deref(disc);
+ tty_ldisc_flush(tty);
if (tty->driver->flush_buffer)
tty->driver->flush_buffer(tty);
/* Kill the entire session */
do_each_task_pid(session, PIDTYPE_SID, p) {
printk(KERN_NOTICE "SAK: killed process %d"
- " (%s): p->signal->session==tty->session\n",
+ " (%s): process_session(p)==tty->session\n",
p->pid, p->comm);
send_sig(SIGKILL, p, 1);
} while_each_task_pid(session, PIDTYPE_SID, p);
do_each_thread(g, p) {
if (p->signal->tty == tty) {
printk(KERN_NOTICE "SAK: killed process %d"
- " (%s): p->signal->session==tty->session\n",
+ " (%s): process_session(p)==tty->session\n",
p->pid, p->comm);
send_sig(SIGKILL, p, 1);
continue;
{
if (!tty)
return;
- PREPARE_WORK(&tty->SAK_work, __do_SAK, tty);
+ PREPARE_WORK(&tty->SAK_work, __do_SAK);
schedule_work(&tty->SAK_work);
}
/**
* flush_to_ldisc
- * @private_: tty structure passed from work queue.
+ * @work: tty structure passed from work queue.
*
* This routine is called out of the software interrupt to flush data
* from the buffer chain to the line discipline.
* receive_buf method is single threaded for each tty instance.
*/
-static void flush_to_ldisc(void *private_)
+static void flush_to_ldisc(struct work_struct *work)
{
- struct tty_struct *tty = (struct tty_struct *) private_;
+ struct tty_struct *tty =
+ container_of(work, struct tty_struct, buf.work.work);
unsigned long flags;
struct tty_ldisc *disc;
struct tty_buffer *tbuf, *head;
tty_ldisc_deref(disc);
}
-/*
- * Routine which returns the baud rate of the tty
- *
- * Note that the baud_table needs to be kept in sync with the
- * include/asm/termbits.h file.
- */
-static int baud_table[] = {
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
- 9600, 19200, 38400, 57600, 115200, 230400, 460800,
-#ifdef __sparc__
- 76800, 153600, 307200, 614400, 921600
-#else
- 500000, 576000, 921600, 1000000, 1152000, 1500000, 2000000,
- 2500000, 3000000, 3500000, 4000000
-#endif
-};
-
-static int n_baud_table = ARRAY_SIZE(baud_table);
-
-/**
- * tty_termios_baud_rate
- * @termios: termios structure
- *
- * Convert termios baud rate data into a speed. This should be called
- * with the termios lock held if this termios is a terminal termios
- * structure. May change the termios data.
- *
- * Locking: none
- */
-
-int tty_termios_baud_rate(struct termios *termios)
-{
- unsigned int cbaud;
-
- cbaud = termios->c_cflag & CBAUD;
-
- if (cbaud & CBAUDEX) {
- cbaud &= ~CBAUDEX;
-
- if (cbaud < 1 || cbaud + 15 > n_baud_table)
- termios->c_cflag &= ~CBAUDEX;
- else
- cbaud += 15;
- }
- return baud_table[cbaud];
-}
-
-EXPORT_SYMBOL(tty_termios_baud_rate);
-
-/**
- * tty_get_baud_rate - get tty bit rates
- * @tty: tty to query
- *
- * Returns the baud rate as an integer for this terminal. The
- * termios lock must be held by the caller and the terminal bit
- * flags may be updated.
- *
- * Locking: none
- */
-
-int tty_get_baud_rate(struct tty_struct *tty)
-{
- int baud = tty_termios_baud_rate(tty->termios);
-
- if (baud == 38400 && tty->alt_speed) {
- if (!tty->warned) {
- printk(KERN_WARNING "Use of setserial/setrocket to "
- "set SPD_* flags is deprecated\n");
- tty->warned = 1;
- }
- baud = tty->alt_speed;
- }
-
- return baud;
-}
-
-EXPORT_SYMBOL(tty_get_baud_rate);
-
/**
* tty_flip_buffer_push - terminal
* @tty: tty to push
spin_unlock_irqrestore(&tty->buf.lock, flags);
if (tty->low_latency)
- flush_to_ldisc((void *) tty);
+ flush_to_ldisc(&tty->buf.work.work);
else
schedule_delayed_work(&tty->buf.work, 1);
}
tty->overrun_time = jiffies;
tty->buf.head = tty->buf.tail = NULL;
tty_buffer_init(tty);
- INIT_WORK(&tty->buf.work, flush_to_ldisc, tty);
+ INIT_DELAYED_WORK(&tty->buf.work, flush_to_ldisc);
init_MUTEX(&tty->buf.pty_sem);
mutex_init(&tty->termios_mutex);
init_waitqueue_head(&tty->write_wait);
init_waitqueue_head(&tty->read_wait);
- INIT_WORK(&tty->hangup_work, do_tty_hangup, tty);
+ INIT_WORK(&tty->hangup_work, do_tty_hangup);
mutex_init(&tty->atomic_read_lock);
mutex_init(&tty->atomic_write_lock);
spin_lock_init(&tty->read_lock);
INIT_LIST_HEAD(&tty->tty_files);
- INIT_WORK(&tty->SAK_work, NULL, NULL);
+ INIT_WORK(&tty->SAK_work, NULL);
}
/*
* This field is optional, if there is no known struct device
* for this tty device it can be set to NULL safely.
*
- * Returns a pointer to the class device (or ERR_PTR(-EFOO) on error).
+ * Returns a pointer to the struct device for this tty device
+ * (or ERR_PTR(-EFOO) on error).
*
* This call is required to be made to register an individual tty device
* if the tty driver's flags have the TTY_DRIVER_DYNAMIC_DEV bit set. If
* Locking: ??
*/
-struct class_device *tty_register_device(struct tty_driver *driver,
- unsigned index, struct device *device)
+struct device *tty_register_device(struct tty_driver *driver, unsigned index,
+ struct device *device)
{
char name[64];
dev_t dev = MKDEV(driver->major, driver->minor_start) + index;
else
tty_line_name(driver, index, name);
- return class_device_create(tty_class, NULL, dev, device, "%s", name);
+ return device_create(tty_class, device, dev, name);
}
/**
void tty_unregister_device(struct tty_driver *driver, unsigned index)
{
- class_device_destroy(tty_class, MKDEV(driver->major, driver->minor_start) + index);
+ device_destroy(tty_class, MKDEV(driver->major, driver->minor_start) + index);
}
EXPORT_SYMBOL(tty_register_device);
kfree(driver);
}
-void tty_set_operations(struct tty_driver *driver, struct tty_operations *op)
+void tty_set_operations(struct tty_driver *driver,
+ const struct tty_operations *op)
{
driver->open = op->open;
driver->close = op->close;
if (p) {
driver->ttys = (struct tty_struct **)p;
- driver->termios = (struct termios **)(p + driver->num);
- driver->termios_locked = (struct termios **)(p + driver->num * 2);
+ driver->termios = (struct ktermios **)(p + driver->num);
+ driver->termios_locked = (struct ktermios **)(p + driver->num * 2);
} else {
driver->ttys = NULL;
driver->termios = NULL;
int tty_unregister_driver(struct tty_driver *driver)
{
int i;
- struct termios *tp;
+ struct ktermios *tp;
void *p;
if (driver->refcount)
cdev_del(&driver->cdev);
return 0;
}
-
EXPORT_SYMBOL(tty_unregister_driver);
+dev_t tty_devnum(struct tty_struct *tty)
+{
+ WARN_ON(!tty);
+ WARN_ON(!tty->magic);
+ WARN_ON(!tty->driver);
+ return MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index;
+}
+EXPORT_SYMBOL(tty_devnum);
+
+void proc_clear_tty(struct task_struct *p)
+{
+ spin_lock_irq(&p->sighand->siglock);
+ p->signal->tty = NULL;
+ spin_unlock_irq(&p->sighand->siglock);
+}
+EXPORT_SYMBOL(proc_clear_tty);
+
+void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty)
+{
+ if (tty) {
+ tty->session = process_session(tsk);
+ tty->pgrp = process_group(tsk);
+ }
+ tsk->signal->tty = tty;
+ tsk->signal->tty_old_pgrp = 0;
+}
+
+void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty)
+{
+ spin_lock_irq(&tsk->sighand->siglock);
+ __proc_set_tty(tsk, tty);
+ spin_unlock_irq(&tsk->sighand->siglock);
+}
+
+struct tty_struct *get_current_tty(void)
+{
+ struct tty_struct *tty;
+ WARN_ON_ONCE(!mutex_is_locked(&tty_mutex));
+ tty = current->signal->tty;
+ /*
+ * session->tty can be changed/cleared from under us, make sure we
+ * issue the load. The obtained pointer, when not NULL, is valid as
+ * long as we hold tty_mutex.
+ */
+ barrier();
+ return tty;
+}
+EXPORT_SYMBOL_GPL(get_current_tty);
/*
* Initialize the console device. This is called *early*, so
if (cdev_add(&tty_cdev, MKDEV(TTYAUX_MAJOR, 0), 1) ||
register_chrdev_region(MKDEV(TTYAUX_MAJOR, 0), 1, "/dev/tty") < 0)
panic("Couldn't register /dev/tty driver\n");
- class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL, "tty");
+ device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), "tty");
cdev_init(&console_cdev, &console_fops);
if (cdev_add(&console_cdev, MKDEV(TTYAUX_MAJOR, 1), 1) ||
register_chrdev_region(MKDEV(TTYAUX_MAJOR, 1), 1, "/dev/console") < 0)
panic("Couldn't register /dev/console driver\n");
- class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 1), NULL, "console");
+ device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 1), "console");
#ifdef CONFIG_UNIX98_PTYS
cdev_init(&ptmx_cdev, &ptmx_fops);
if (cdev_add(&ptmx_cdev, MKDEV(TTYAUX_MAJOR, 2), 1) ||
register_chrdev_region(MKDEV(TTYAUX_MAJOR, 2), 1, "/dev/ptmx") < 0)
panic("Couldn't register /dev/ptmx driver\n");
- class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx");
+ device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), "ptmx");
#endif
#ifdef CONFIG_VT
if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
panic("Couldn't register /dev/tty0 driver\n");
- class_device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
+ device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), "tty0");
vty_init();
out_vt:
git://git.onelab.eu / linux-2.6.git / blobdiff