#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);
int tty_ioctl(struct inode * inode, struct file * file,
unsigned int cmd, unsigned long arg);
static int tty_fasync(int fd, struct file * filp, int on);
-static void release_mem(struct tty_struct *tty, int idx);
+static void release_tty(struct tty_struct *tty, int idx);
+static struct pid *__proc_set_tty(struct task_struct *tsk,
+ struct tty_struct *tty);
/**
* alloc_tty_struct - allocate a tty object
{
if (current->signal->tty != tty)
return 0;
- if (tty->pgrp <= 0) {
- printk(KERN_WARNING "tty_check_change: tty->pgrp <= 0!\n");
+ if (!tty->pgrp) {
+ printk(KERN_WARNING "tty_check_change: tty->pgrp == NULL!\n");
return 0;
}
- if (process_group(current) == tty->pgrp)
+ if (task_pgrp(current) == tty->pgrp)
return 0;
if (is_ignored(SIGTTOU))
return 0;
- if (is_orphaned_pgrp(process_group(current)))
+ if (is_current_pgrp_orphaned())
return -EIO;
- (void) kill_pg(process_group(current), SIGTTOU, 1);
+ (void) kill_pgrp(task_pgrp(current), SIGTTOU, 1);
return -ERESTARTSYS;
}
}
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
* 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);
tty_release is called */
read_lock(&tasklist_lock);
- if (tty->session > 0) {
- do_each_task_pid(tty->session, PIDTYPE_SID, p) {
+ if (tty->session) {
+ do_each_pid_task(tty->session, PIDTYPE_SID, p) {
spin_lock_irq(&p->sighand->siglock);
if (p->signal->tty == tty)
p->signal->tty = NULL;
}
__group_send_sig_info(SIGHUP, SEND_SIG_PRIV, p);
__group_send_sig_info(SIGCONT, SEND_SIG_PRIV, p);
- if (tty->pgrp > 0)
- p->signal->tty_old_pgrp = tty->pgrp;
+ put_pid(p->signal->tty_old_pgrp); /* A noop */
+ if (tty->pgrp)
+ p->signal->tty_old_pgrp = get_pid(tty->pgrp);
spin_unlock_irq(&p->sighand->siglock);
- } while_each_task_pid(tty->session, PIDTYPE_SID, p);
+ } while_each_pid_task(tty->session, PIDTYPE_SID, p);
}
read_unlock(&tasklist_lock);
tty->flags = 0;
- tty->session = 0;
- tty->pgrp = -1;
+ tty->session = NULL;
+ tty->pgrp = NULL;
tty->ctrl_status = 0;
/*
* If one of the devices matches a console pointer, we
EXPORT_SYMBOL(tty_hung_up_p);
-static void session_clear_tty(pid_t session)
+static void session_clear_tty(struct pid *session)
{
struct task_struct *p;
- do_each_task_pid(session, PIDTYPE_SID, p) {
+ do_each_pid_task(session, PIDTYPE_SID, p) {
proc_clear_tty(p);
- } while_each_task_pid(session, PIDTYPE_SID, p);
+ } while_each_pid_task(session, PIDTYPE_SID, p);
}
/**
void disassociate_ctty(int on_exit)
{
struct tty_struct *tty;
- int tty_pgrp = -1;
- int session;
+ struct pid *tty_pgrp = NULL;
lock_kernel();
mutex_lock(&tty_mutex);
tty = get_current_tty();
if (tty) {
- tty_pgrp = tty->pgrp;
+ tty_pgrp = get_pid(tty->pgrp);
mutex_unlock(&tty_mutex);
/* XXX: here we race, there is nothing protecting tty */
if (on_exit && tty->driver->type != TTY_DRIVER_TYPE_PTY)
tty_vhangup(tty);
- } else {
- pid_t old_pgrp = current->signal->tty_old_pgrp;
+ } else if (on_exit) {
+ struct pid *old_pgrp;
+ spin_lock_irq(¤t->sighand->siglock);
+ old_pgrp = current->signal->tty_old_pgrp;
+ current->signal->tty_old_pgrp = NULL;
+ spin_unlock_irq(¤t->sighand->siglock);
if (old_pgrp) {
- kill_pg(old_pgrp, SIGHUP, on_exit);
- kill_pg(old_pgrp, SIGCONT, on_exit);
+ kill_pgrp(old_pgrp, SIGHUP, on_exit);
+ kill_pgrp(old_pgrp, SIGCONT, on_exit);
+ put_pid(old_pgrp);
}
mutex_unlock(&tty_mutex);
unlock_kernel();
return;
}
- if (tty_pgrp > 0) {
- kill_pg(tty_pgrp, SIGHUP, on_exit);
+ if (tty_pgrp) {
+ kill_pgrp(tty_pgrp, SIGHUP, on_exit);
if (!on_exit)
- kill_pg(tty_pgrp, SIGCONT, on_exit);
+ kill_pgrp(tty_pgrp, SIGCONT, on_exit);
+ put_pid(tty_pgrp);
}
spin_lock_irq(¤t->sighand->siglock);
+ tty_pgrp = current->signal->tty_old_pgrp;
current->signal->tty_old_pgrp = 0;
- session = current->signal->session;
spin_unlock_irq(¤t->sighand->siglock);
+ put_pid(tty_pgrp);
mutex_lock(&tty_mutex);
/* It is possible that do_tty_hangup has free'd this tty */
tty = get_current_tty();
if (tty) {
- tty->session = 0;
- tty->pgrp = 0;
+ put_pid(tty->session);
+ put_pid(tty->pgrp);
+ tty->session = NULL;
+ tty->pgrp = NULL;
} else {
#ifdef TTY_DEBUG_HANGUP
printk(KERN_DEBUG "error attempted to write to tty [0x%p]"
/* Now clear signal->tty under the lock */
read_lock(&tasklist_lock);
- session_clear_tty(session);
+ session_clear_tty(task_session(current));
read_unlock(&tasklist_lock);
unlock_kernel();
}
/* If we have a running line discipline it may need kicking */
tty_wakeup(tty);
- wake_up_interruptible(&tty->write_wait);
}
EXPORT_SYMBOL(start_tty);
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 (!*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));
}
/*
/*
* All structures have been allocated, so now we install them.
- * Failures after this point use release_mem to clean up, so
+ * Failures after this point use release_tty to clean up, so
* there's no need to null out the local pointers.
*/
if (!(driver->flags & TTY_DRIVER_DEVPTS_MEM)) {
*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++;
/*
* Structures all installed ... call the ldisc open routines.
- * If we fail here just call release_mem to clean up. No need
- * to decrement the use counts, as release_mem doesn't care.
+ * If we fail here just call release_tty to clean up. No need
+ * to decrement the use counts, as release_tty doesn't care.
*/
if (tty->ldisc.open) {
retval = -ENOMEM;
goto end_init;
- /* call the tty release_mem routine to clean out this slot */
+ /* call the tty release_tty routine to clean out this slot */
release_mem_out:
if (printk_ratelimit())
printk(KERN_INFO "init_dev: ldisc open failed, "
"clearing slot %d\n", idx);
- release_mem(tty, idx);
+ release_tty(tty, idx);
goto end_init;
}
/**
- * release_mem - release tty structure memory
+ * release_one_tty - release tty structure memory
*
* Releases memory associated with a tty structure, and clears out the
* driver table slots. This function is called when a device is no longer
* of ttys that the driver keeps.
* FIXME: should we require tty_mutex is held here ??
*/
-
-static void release_mem(struct tty_struct *tty, int idx)
+static void release_one_tty(struct tty_struct *tty, int idx)
{
- struct tty_struct *o_tty;
- struct termios *tp;
int devpts = tty->driver->flags & TTY_DRIVER_DEVPTS_MEM;
-
- if ((o_tty = tty->link) != NULL) {
- if (!devpts)
- o_tty->driver->ttys[idx] = NULL;
- if (o_tty->driver->flags & TTY_DRIVER_RESET_TERMIOS) {
- tp = o_tty->termios;
- if (!devpts)
- o_tty->driver->termios[idx] = NULL;
- kfree(tp);
-
- tp = o_tty->termios_locked;
- if (!devpts)
- o_tty->driver->termios_locked[idx] = NULL;
- kfree(tp);
- }
- o_tty->magic = 0;
- o_tty->driver->refcount--;
- file_list_lock();
- list_del_init(&o_tty->tty_files);
- file_list_unlock();
- free_tty_struct(o_tty);
- }
+ struct ktermios *tp;
if (!devpts)
tty->driver->ttys[idx] = NULL;
+
if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS) {
tp = tty->termios;
if (!devpts)
kfree(tp);
}
+
tty->magic = 0;
tty->driver->refcount--;
+
file_list_lock();
list_del_init(&tty->tty_files);
file_list_unlock();
- module_put(tty->driver->owner);
+
free_tty_struct(tty);
}
+/**
+ * release_tty - release tty structure memory
+ *
+ * Release both @tty and a possible linked partner (think pty pair),
+ * and decrement the refcount of the backing module.
+ *
+ * Locking:
+ * tty_mutex - sometimes only
+ * takes the file list lock internally when working on the list
+ * of ttys that the driver keeps.
+ * FIXME: should we require tty_mutex is held here ??
+ */
+static void release_tty(struct tty_struct *tty, int idx)
+{
+ struct tty_driver *driver = tty->driver;
+
+ if (tty->link)
+ release_one_tty(tty->link, idx);
+ release_one_tty(tty, idx);
+ module_put(driver->owner);
+}
+
/*
* Even releasing the tty structures is a tricky business.. We have
* to be very careful that the structures are all released at the
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");
tty_set_termios_ldisc(o_tty,N_TTY);
}
/*
- * The release_mem function takes care of the details of clearing
+ * The release_tty function takes care of the details of clearing
* the slots and preserving the termios structure.
*/
- release_mem(tty, idx);
+ release_tty(tty, idx);
#ifdef CONFIG_UNIX98_PTYS
/* Make this pty number available for reallocation */
int index;
dev_t device = inode->i_rdev;
unsigned short saved_flags = filp->f_flags;
+ struct pid *old_pgrp;
nonseekable_open(inode, filp);
goto retry_open;
}
+ old_pgrp = NULL;
mutex_lock(&tty_mutex);
spin_lock_irq(¤t->sighand->siglock);
if (!noctty &&
current->signal->leader &&
!current->signal->tty &&
- tty->session == 0)
- __proc_set_tty(current, tty);
+ tty->session == NULL)
+ old_pgrp = __proc_set_tty(current, tty);
spin_unlock_irq(¤t->sighand->siglock);
mutex_unlock(&tty_mutex);
+ put_pid(old_pgrp);
return 0;
}
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);
return retval;
if (on) {
+ enum pid_type type;
+ struct pid *pid;
if (!waitqueue_active(&tty->read_wait))
tty->minimum_to_wake = 1;
- retval = f_setown(filp, (-tty->pgrp) ? : current->pid, 0);
+ if (tty->pgrp) {
+ pid = tty->pgrp;
+ type = PIDTYPE_PGID;
+ } else {
+ pid = task_pid(current);
+ type = PIDTYPE_PID;
+ }
+ retval = __f_setown(filp, pid, type, 0);
if (retval)
return retval;
} else {
}
}
#endif
- if (tty->pgrp > 0)
- kill_pg(tty->pgrp, SIGWINCH, 1);
- if ((real_tty->pgrp != tty->pgrp) && (real_tty->pgrp > 0))
- kill_pg(real_tty->pgrp, SIGWINCH, 1);
+ if (tty->pgrp)
+ kill_pgrp(tty->pgrp, SIGWINCH, 1);
+ if ((real_tty->pgrp != tty->pgrp) && real_tty->pgrp)
+ kill_pgrp(real_tty->pgrp, SIGWINCH, 1);
tty->winsize = tmp_ws;
real_tty->winsize = tmp_ws;
done:
static int tiocsctty(struct tty_struct *tty, int arg)
{
int ret = 0;
- if (current->signal->leader &&
- (current->signal->session == tty->session))
+ if (current->signal->leader && (task_session(current) == tty->session))
return ret;
mutex_lock(&tty_mutex);
goto unlock;
}
- if (tty->session > 0) {
+ if (tty->session) {
/*
* This tty is already the controlling
* tty for another session group!
*/
if (tty == real_tty && current->signal->tty != real_tty)
return -ENOTTY;
- return put_user(real_tty->pgrp, p);
+ return put_user(pid_nr(real_tty->pgrp), p);
}
/**
static int tiocspgrp(struct tty_struct *tty, struct tty_struct *real_tty, pid_t __user *p)
{
- pid_t pgrp;
+ struct pid *pgrp;
+ pid_t pgrp_nr;
int retval = tty_check_change(real_tty);
if (retval == -EIO)
return retval;
if (!current->signal->tty ||
(current->signal->tty != real_tty) ||
- (real_tty->session != current->signal->session))
+ (real_tty->session != task_session(current)))
return -ENOTTY;
- if (get_user(pgrp, p))
+ if (get_user(pgrp_nr, p))
return -EFAULT;
- if (pgrp < 0)
+ if (pgrp_nr < 0)
return -EINVAL;
- if (session_of_pgrp(pgrp) != current->signal->session)
- return -EPERM;
- real_tty->pgrp = pgrp;
- return 0;
+ rcu_read_lock();
+ pgrp = find_pid(pgrp_nr);
+ retval = -ESRCH;
+ if (!pgrp)
+ goto out_unlock;
+ retval = -EPERM;
+ if (session_of_pgrp(pgrp) != task_session(current))
+ goto out_unlock;
+ retval = 0;
+ put_pid(real_tty->pgrp);
+ real_tty->pgrp = get_pid(pgrp);
+out_unlock:
+ rcu_read_unlock();
+ return retval;
}
/**
*/
if (tty == real_tty && current->signal->tty != real_tty)
return -ENOTTY;
- if (real_tty->session <= 0)
+ if (!real_tty->session)
return -ENOTTY;
- return put_user(real_tty->session, p);
+ return put_user(pid_nr(real_tty->session), p);
}
/**
* 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(struct work_struct *work)
+void __do_SAK(struct tty_struct *tty)
{
- struct tty_struct *tty =
- container_of(work, struct tty_struct, SAK_work);
#ifdef TTY_SOFT_SAK
tty_hangup(tty);
#else
struct task_struct *g, *p;
- int session;
+ struct pid *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);
read_lock(&tasklist_lock);
/* Kill the entire session */
- do_each_task_pid(session, PIDTYPE_SID, p) {
+ do_each_pid_task(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);
+ } while_each_pid_task(session, PIDTYPE_SID, p);
/* Now kill any processes that happen to have the
* tty open.
*/
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;
#endif
}
+static void do_SAK_work(struct work_struct *work)
+{
+ struct tty_struct *tty =
+ container_of(work, struct tty_struct, SAK_work);
+ __do_SAK(tty);
+}
+
/*
* The tq handling here is a little racy - tty->SAK_work may already be queued.
* Fortunately we don't need to worry, because if ->SAK_work is already queued,
{
if (!tty)
return;
- PREPARE_WORK(&tty->SAK_work, __do_SAK);
schedule_work(&tty->SAK_work);
}
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
memset(tty, 0, sizeof(struct tty_struct));
tty->magic = TTY_MAGIC;
tty_ldisc_assign(tty, tty_ldisc_get(N_TTY));
- tty->pgrp = -1;
+ tty->session = NULL;
+ tty->pgrp = NULL;
tty->overrun_time = jiffies;
tty->buf.head = tty->buf.tail = NULL;
tty_buffer_init(tty);
mutex_init(&tty->atomic_write_lock);
spin_lock_init(&tty->read_lock);
INIT_LIST_HEAD(&tty->tty_files);
- INIT_WORK(&tty->SAK_work, NULL);
+ INIT_WORK(&tty->SAK_work, do_SAK_work);
}
/*
if (!driver->major) {
error = alloc_chrdev_region(&dev, driver->minor_start, driver->num,
- (char*)driver->name);
+ driver->name);
if (!error) {
driver->major = MAJOR(dev);
driver->minor_start = MINOR(dev);
}
} else {
dev = MKDEV(driver->major, driver->minor_start);
- error = register_chrdev_region(dev, driver->num,
- (char*)driver->name);
+ error = register_chrdev_region(dev, driver->num, driver->name);
}
if (error < 0) {
kfree(p);
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)
}
EXPORT_SYMBOL(proc_clear_tty);
-void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty)
+static struct pid *__proc_set_tty(struct task_struct *tsk, struct tty_struct *tty)
{
+ struct pid *old_pgrp;
if (tty) {
- tty->session = tsk->signal->session;
- tty->pgrp = process_group(tsk);
+ tty->session = get_pid(task_session(tsk));
+ tty->pgrp = get_pid(task_pgrp(tsk));
}
+ old_pgrp = tsk->signal->tty_old_pgrp;
tsk->signal->tty = tty;
- tsk->signal->tty_old_pgrp = 0;
+ tsk->signal->tty_old_pgrp = NULL;
+ return old_pgrp;
}
void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty)
{
+ struct pid *old_pgrp;
+
spin_lock_irq(&tsk->sighand->siglock);
- __proc_set_tty(tsk, tty);
+ old_pgrp = __proc_set_tty(tsk, tty);
spin_unlock_irq(&tsk->sighand->siglock);
+
+ put_pid(old_pgrp);
}
struct tty_struct *get_current_tty(void)
barrier();
return tty;
}
+EXPORT_SYMBOL_GPL(get_current_tty);
/*
* Initialize the console device. This is called *early*, so
projects / linux-2.6 / blobdiff