2 files changed, 282 insertions, 113 deletions

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 48cee2004e97..4044c864fdd4 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -109,13 +109,15 @@
 #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);
@@ -1239,6 +1241,22 @@ void tty_ldisc_flush(struct tty_struct *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
@@ -1327,11 +1345,7 @@ static void do_tty_hangup(struct work_struct *work)
          * 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);
@@ -1870,8 +1884,8 @@ static int init_dev(struct tty_driver *driver, int idx,
         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 */
@@ -1918,7 +1932,7 @@ static int init_dev(struct tty_driver *driver, int idx,
         }
 
         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;
@@ -1926,11 +1940,11 @@ static int init_dev(struct tty_driver *driver, int idx,
         }
 
         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) {
@@ -1951,19 +1965,19 @@ static int init_dev(struct tty_driver *driver, int idx,
                 }
 
                 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));
                 }
 
                 /*
@@ -2002,6 +2016,9 @@ static int init_dev(struct tty_driver *driver, int idx,
                 *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++;
 
@@ -2104,7 +2121,7 @@ release_mem_out:
 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) {
@@ -3458,84 +3475,6 @@ static void flush_to_ldisc(struct work_struct *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
@@ -3758,8 +3697,8 @@ int tty_register_driver(struct tty_driver *driver)
 
         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;
@@ -3798,7 +3737,7 @@ EXPORT_SYMBOL(tty_register_driver);
 int tty_unregister_driver(struct tty_driver *driver)
 {
         int i;
-        struct termios *tp;
+        struct ktermios *tp;
         void *p;
 
         if (driver->refcount)
diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
index 3b6fa7b0be8b..0ffba4e911ca 100644
--- a/drivers/char/tty_ioctl.c
+++ b/drivers/char/tty_ioctl.c
@@ -36,6 +36,7 @@
 #define TERMIOS_FLUSH   1
 #define TERMIOS_WAIT    2
 #define TERMIOS_TERMIO  4
+#define TERMIOS_OLD     8
 
 
 /**
@@ -84,9 +85,9 @@ stop_waiting:
 
 EXPORT_SYMBOL(tty_wait_until_sent);
 
-static void unset_locked_termios(struct termios *termios,
-                                 struct termios *old,
-                                 struct termios *locked)
+static void unset_locked_termios(struct ktermios *termios,
+                                 struct ktermios *old,
+                                 struct ktermios *locked)
 {
         int     i;
         
@@ -105,8 +106,204 @@ static void unset_locked_termios(struct termios *termios,
         for (i=0; i < NCCS; i++)
                 termios->c_cc[i] = locked->c_cc[i] ?
                         old->c_cc[i] : termios->c_cc[i];
+        /* FIXME: What should we do for i/ospeed */
 }
 
+/*
+ * 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 const speed_t 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
+};
+
+#ifndef __sparc__
+static const tcflag_t baud_bits[] = {
+        B0, B50, B75, B110, B134, B150, B200, B300, B600,
+        B1200, B1800, B2400, B4800, B9600, B19200, B38400,
+        B57600, B115200, B230400, B460800, B500000, B576000,
+        B921600, B1000000, B1152000, B1500000, B2000000, B2500000,
+        B3000000, B3500000, B4000000
+};
+#else
+static const tcflag_t baud_bits[] = {
+        B0, B50, B75, B110, B134, B150, B200, B300, B600,
+        B1200, B1800, B2400, B4800, B9600, B19200, B38400,
+        B57600, B115200, B230400, B460800, B76800, B153600,
+        B307200, B614400, B921600
+};
+#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. Device drivers can call this
+ *      function but should use ->c_[io]speed directly as they are updated.
+ *
+ *      Locking: none
+ */
+
+speed_t tty_termios_baud_rate(struct ktermios *termios)
+{
+        unsigned int cbaud;
+
+        cbaud = termios->c_cflag & CBAUD;
+
+#ifdef BOTHER
+        /* Magic token for arbitary speed via c_ispeed/c_ospeed */
+        if (cbaud == BOTHER)
+                return termios->c_ospeed;
+#endif
+        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_termios_input_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. Device drivers can call this
+ *      function but should use ->c_[io]speed directly as they are updated.
+ *
+ *      Locking: none
+ */
+
+speed_t tty_termios_input_baud_rate(struct ktermios *termios)
+{
+#ifdef IBSHIFT
+        unsigned int cbaud = (termios->c_cflag >> IBSHIFT) & CBAUD;
+
+        if (cbaud == B0)
+                return tty_termios_baud_rate(termios);
+
+        /* Magic token for arbitary speed via c_ispeed*/
+        if (cbaud == BOTHER)
+                return termios->c_ispeed;
+
+        if (cbaud & CBAUDEX) {
+                cbaud &= ~CBAUDEX;
+
+                if (cbaud < 1 || cbaud + 15 > n_baud_table)
+                        termios->c_cflag &= ~(CBAUDEX << IBSHIFT);
+                else
+                        cbaud += 15;
+        }
+        return baud_table[cbaud];
+#else
+        return tty_termios_baud_rate(termios);
+#endif
+}
+
+EXPORT_SYMBOL(tty_termios_input_baud_rate);
+
+#ifdef BOTHER
+
+/**
+ *      tty_termios_encode_baud_rate
+ *      @termios: termios structure
+ *      @ispeed: input speed
+ *      @ospeed: output speed
+ *
+ *      Encode the speeds set into the passed termios structure. This is
+ *      used as a library helper for drivers os that they can report back
+ *      the actual speed selected when it differs from the speed requested
+ *
+ *      For now input and output speed must agree.
+ *
+ *      Locking: Caller should hold termios lock. This is already held
+ *      when calling this function from the driver termios handler.
+ */
+
+void tty_termios_encode_baud_rate(struct ktermios *termios, speed_t ibaud, speed_t obaud)
+{
+        int i = 0;
+        int ifound = 0, ofound = 0;
+
+        termios->c_ispeed = ibaud;
+        termios->c_ospeed = obaud;
+
+        termios->c_cflag &= ~CBAUD;
+        /* Identical speed means no input encoding (ie B0 << IBSHIFT)*/
+        if (termios->c_ispeed == termios->c_ospeed)
+                ifound = 1;
+
+        do {
+                if (obaud == baud_table[i]) {
+                        termios->c_cflag |= baud_bits[i];
+                        ofound = 1;
+                        /* So that if ibaud == obaud we don't set it */
+                        continue;
+                }
+                if (ibaud == baud_table[i]) {
+                        termios->c_cflag |= (baud_bits[i] << IBSHIFT);
+                        ifound = 1;
+                }
+        }
+        while(++i < n_baud_table);
+        if (!ofound)
+                termios->c_cflag |= BOTHER;
+        if (!ifound)
+                termios->c_cflag |= (BOTHER << IBSHIFT);
+}
+
+EXPORT_SYMBOL_GPL(tty_termios_encode_baud_rate);
+
+#endif
+
+/**
+ *      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
+ */
+
+speed_t tty_get_baud_rate(struct tty_struct *tty)
+{
+        speed_t 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);
+
 /**
  *      change_termios          -       update termios values
  *      @tty: tty to update
@@ -119,10 +316,10 @@ static void unset_locked_termios(struct termios *termios,
  *      Locking: termios_sem
  */
 
-static void change_termios(struct tty_struct * tty, struct termios * new_termios)
+static void change_termios(struct tty_struct * tty, struct ktermios * new_termios)
 {
         int canon_change;
-        struct termios old_termios = *tty->termios;
+        struct ktermios old_termios = *tty->termios;
         struct tty_ldisc *ld;
         
         /*
@@ -195,7 +392,7 @@ static void change_termios(struct tty_struct * tty, struct termios * new_termios
 
 static int set_termios(struct tty_struct * tty, void __user *arg, int opt)
 {
-        struct termios tmp_termios;
+        struct ktermios tmp_termios;
         struct tty_ldisc *ld;
         int retval = tty_check_change(tty);
 
@@ -203,16 +400,28 @@ static int set_termios(struct tty_struct * tty, void __user *arg, int opt)
                 return retval;
 
         if (opt & TERMIOS_TERMIO) {
-                memcpy(&tmp_termios, tty->termios, sizeof(struct termios));
+                memcpy(&tmp_termios, tty->termios, sizeof(struct ktermios));
                 if (user_termio_to_kernel_termios(&tmp_termios,
                                                 (struct termio __user *)arg))
                         return -EFAULT;
+#ifdef TCGETS2
+        } else if (opt & TERMIOS_OLD) {
+                memcpy(&tmp_termios, tty->termios, sizeof(struct termios));
+                if (user_termios_to_kernel_termios_1(&tmp_termios,
+                                                (struct termios_v1 __user *)arg))
+                        return -EFAULT;
+#endif
         } else {
                 if (user_termios_to_kernel_termios(&tmp_termios,
                                                 (struct termios __user *)arg))
                         return -EFAULT;
         }
 
+        /* If old style Bfoo values are used then load c_ispeed/c_ospeed with the real speed
+           so its unconditionally usable */
+        tmp_termios.c_ispeed = tty_termios_input_baud_rate(&tmp_termios);
+        tmp_termios.c_ospeed = tty_termios_baud_rate(&tmp_termios);
+
         ld = tty_ldisc_ref(tty);
         
         if (ld != NULL) {
@@ -286,8 +495,8 @@ static int get_sgttyb(struct tty_struct * tty, struct sgttyb __user * sgttyb)
         struct sgttyb tmp;
 
         mutex_lock(&tty->termios_mutex);
-        tmp.sg_ispeed = 0;
-        tmp.sg_ospeed = 0;
+        tmp.sg_ispeed = tty->c_ispeed;
+        tmp.sg_ospeed = tty->c_ospeed;
         tmp.sg_erase = tty->termios->c_cc[VERASE];
         tmp.sg_kill = tty->termios->c_cc[VKILL];
         tmp.sg_flags = get_sgflags(tty);
@@ -296,7 +505,7 @@ static int get_sgttyb(struct tty_struct * tty, struct sgttyb __user * sgttyb)
         return copy_to_user(sgttyb, &tmp, sizeof(tmp)) ? -EFAULT : 0;
 }
 
-static void set_sgflags(struct termios * termios, int flags)
+static void set_sgflags(struct ktermios * termios, int flags)
 {
         termios->c_iflag = ICRNL | IXON;
         termios->c_oflag = 0;
@@ -337,7 +546,7 @@ static int set_sgttyb(struct tty_struct * tty, struct sgttyb __user * sgttyb)
 {
         int retval;
         struct sgttyb tmp;
-        struct termios termios;
+        struct ktermios termios;
 
         retval = tty_check_change(tty);
         if (retval)
@@ -351,6 +560,10 @@ static int set_sgttyb(struct tty_struct * tty, struct sgttyb __user * sgttyb)
         termios.c_cc[VERASE] = tmp.sg_erase;
         termios.c_cc[VKILL] = tmp.sg_kill;
         set_sgflags(&termios, tmp.sg_flags);
+        /* Try and encode into Bfoo format */
+#ifdef BOTHER
+        tty_termios_encode_baud_rate(&termios, termios.c_ispeed, termios.c_ospeed);
+#endif
         mutex_unlock(&tty->termios_mutex);
         change_termios(tty, &termios);
         return 0;
@@ -481,16 +694,33 @@ int n_tty_ioctl(struct tty_struct * tty, struct file * file,
                 case TIOCSLTC:
                         return set_ltchars(real_tty, p);
 #endif
+                case TCSETSF:
+                        return set_termios(real_tty, p,  TERMIOS_FLUSH | TERMIOS_WAIT | TERMIOS_OLD);
+                case TCSETSW:
+                        return set_termios(real_tty, p, TERMIOS_WAIT | TERMIOS_OLD);
+                case TCSETS:
+                        return set_termios(real_tty, p, TERMIOS_OLD);
+#ifndef TCGETS2
                 case TCGETS:
                         if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios))
                                 return -EFAULT;
                         return 0;
-                case TCSETSF:
+#else
+                case TCGETS:
+                        if (kernel_termios_to_user_termios_1((struct termios_v1 __user *)arg, real_tty->termios))
+                                return -EFAULT;
+                        return 0;
+                case TCGETS2:
+                        if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios))
+                                return -EFAULT;
+                        return 0;
+                case TCSETSF2:
                         return set_termios(real_tty, p,  TERMIOS_FLUSH | TERMIOS_WAIT);
-                case TCSETSW:
+                case TCSETSW2:
                         return set_termios(real_tty, p, TERMIOS_WAIT);
-                case TCSETS:
+                case TCSETS2:
                         return set_termios(real_tty, p, 0);
+#endif
                 case TCGETA:
                         return get_termio(real_tty, p);
                 case TCSETAF: