linux-hardened/arch/um/drivers/ssl.c
Jeff Dike edea138584 uml: tidy kern_util.h
Tidy kern_util.h.  It turns out that most of the function declarations
aren't used, so they can go away.  os.h no longer includes
kern_util.h, so files which got it through os.h now need to include it
directly.  A number of other files never needed it, so these includes
are deleted.

The structure which was used to pass signal handlers from the kernel
side to the userspace side is gone.  Instead, the handlers are
declared here, and used directly from libc code.  This allows
arch/um/os-Linux/trap.c to be deleted, with its remnants being moved
to arch/um/os-Linux/skas/trap.c.

arch/um/os-Linux/tty.c had its inclusions changed, and it needed some
style attention, so it got tidied.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 09:44:26 -08:00

231 lines
5.3 KiB
C

/*
* Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include "linux/fs.h"
#include "linux/tty.h"
#include "linux/tty_driver.h"
#include "linux/major.h"
#include "linux/mm.h"
#include "linux/init.h"
#include "linux/console.h"
#include "asm/termbits.h"
#include "asm/irq.h"
#include "line.h"
#include "ssl.h"
#include "chan_kern.h"
#include "kern.h"
#include "init.h"
#include "irq_user.h"
#include "mconsole_kern.h"
static const int ssl_version = 1;
/* Referenced only by tty_driver below - presumably it's locked correctly
* by the tty driver.
*/
static struct tty_driver *ssl_driver;
#define NR_PORTS 64
static void ssl_announce(char *dev_name, int dev)
{
printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev,
dev_name);
}
/* Almost const, except that xterm_title may be changed in an initcall */
static struct chan_opts opts = {
.announce = ssl_announce,
.xterm_title = "Serial Line #%d",
.raw = 1,
};
static int ssl_config(char *str, char **error_out);
static int ssl_get_config(char *dev, char *str, int size, char **error_out);
static int ssl_remove(int n, char **error_out);
/* Const, except for .mc.list */
static struct line_driver driver = {
.name = "UML serial line",
.device_name = "ttyS",
.major = TTY_MAJOR,
.minor_start = 64,
.type = TTY_DRIVER_TYPE_SERIAL,
.subtype = 0,
.read_irq = SSL_IRQ,
.read_irq_name = "ssl",
.write_irq = SSL_WRITE_IRQ,
.write_irq_name = "ssl-write",
.mc = {
.list = LIST_HEAD_INIT(driver.mc.list),
.name = "ssl",
.config = ssl_config,
.get_config = ssl_get_config,
.id = line_id,
.remove = ssl_remove,
},
};
/* The array is initialized by line_init, at initcall time. The
* elements are locked individually as needed.
*/
static struct line serial_lines[NR_PORTS] =
{ [0 ... NR_PORTS - 1] = LINE_INIT(CONFIG_SSL_CHAN, &driver) };
static int ssl_config(char *str, char **error_out)
{
return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts,
error_out);
}
static int ssl_get_config(char *dev, char *str, int size, char **error_out)
{
return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str,
size, error_out);
}
static int ssl_remove(int n, char **error_out)
{
return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n,
error_out);
}
static int ssl_open(struct tty_struct *tty, struct file *filp)
{
int err = line_open(serial_lines, tty);
if (err)
printk(KERN_ERR "Failed to open serial line %d, err = %d\n",
tty->index, err);
return err;
}
#if 0
static void ssl_flush_buffer(struct tty_struct *tty)
{
return;
}
static void ssl_stop(struct tty_struct *tty)
{
printk(KERN_ERR "Someone should implement ssl_stop\n");
}
static void ssl_start(struct tty_struct *tty)
{
printk(KERN_ERR "Someone should implement ssl_start\n");
}
void ssl_hangup(struct tty_struct *tty)
{
}
#endif
static const struct tty_operations ssl_ops = {
.open = ssl_open,
.close = line_close,
.write = line_write,
.put_char = line_put_char,
.write_room = line_write_room,
.chars_in_buffer = line_chars_in_buffer,
.flush_buffer = line_flush_buffer,
.flush_chars = line_flush_chars,
.set_termios = line_set_termios,
.ioctl = line_ioctl,
.throttle = line_throttle,
.unthrottle = line_unthrottle,
#if 0
.stop = ssl_stop,
.start = ssl_start,
.hangup = ssl_hangup,
#endif
};
/* Changed by ssl_init and referenced by ssl_exit, which are both serialized
* by being an initcall and exitcall, respectively.
*/
static int ssl_init_done = 0;
static void ssl_console_write(struct console *c, const char *string,
unsigned len)
{
struct line *line = &serial_lines[c->index];
unsigned long flags;
spin_lock_irqsave(&line->lock, flags);
console_write_chan(&line->chan_list, string, len);
spin_unlock_irqrestore(&line->lock, flags);
}
static struct tty_driver *ssl_console_device(struct console *c, int *index)
{
*index = c->index;
return ssl_driver;
}
static int ssl_console_setup(struct console *co, char *options)
{
struct line *line = &serial_lines[co->index];
return console_open_chan(line, co);
}
/* No locking for register_console call - relies on single-threaded initcalls */
static struct console ssl_cons = {
.name = "ttyS",
.write = ssl_console_write,
.device = ssl_console_device,
.setup = ssl_console_setup,
.flags = CON_PRINTBUFFER|CON_ANYTIME,
.index = -1,
};
static int ssl_init(void)
{
char *new_title;
printk(KERN_INFO "Initializing software serial port version %d\n",
ssl_version);
ssl_driver = register_lines(&driver, &ssl_ops, serial_lines,
ARRAY_SIZE(serial_lines));
new_title = add_xterm_umid(opts.xterm_title);
if (new_title != NULL)
opts.xterm_title = new_title;
lines_init(serial_lines, ARRAY_SIZE(serial_lines), &opts);
ssl_init_done = 1;
register_console(&ssl_cons);
return 0;
}
late_initcall(ssl_init);
static void ssl_exit(void)
{
if (!ssl_init_done)
return;
close_lines(serial_lines, ARRAY_SIZE(serial_lines));
}
__uml_exitcall(ssl_exit);
static int ssl_chan_setup(char *str)
{
char *error;
int ret;
ret = line_setup(serial_lines, ARRAY_SIZE(serial_lines), str, &error);
if(ret < 0)
printk(KERN_ERR "Failed to set up serial line with "
"configuration string \"%s\" : %s\n", str, error);
return 1;
}
__setup("ssl", ssl_chan_setup);
__channel_help(ssl_chan_setup, "ssl");