Messages in this thread Patch in this message | | | From | Rodolfo Giometti <> | Date | Thu, 2 Oct 2008 09:41:45 +0200 | Subject | [PATCH 06/10] ldisc n_tty: export all N_TTY ldisc methods. |
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Signed-off-by: Rodolfo Giometti <giometti@linux.it> --- drivers/char/n_tty.c | 54 +++++++++++++++++++++++++++++-------------------- include/linux/tty.h | 16 ++++++++++++++ 2 files changed, 48 insertions(+), 22 deletions(-)
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c index 708c2b1..8458ded 100644 --- a/drivers/char/n_tty.c +++ b/drivers/char/n_tty.c @@ -26,7 +26,7 @@ * * 2002/03/18 Implemented n_tty_wakeup to send SIGIO POLL_OUTs to * waiting writing processes-Sapan Bhatia <sapan@corewars.org>. - * Also fixed a bug in BLOCKING mode where write_chan returns + * Also fixed a bug in BLOCKING mode where n_tty_write returns * EAGAIN */ @@ -43,10 +43,10 @@ #include <linux/mm.h> #include <linux/string.h> #include <linux/slab.h> -#include <linux/poll.h> #include <linux/bitops.h> #include <linux/audit.h> #include <linux/file.h> +#include <linux/module.h> #include <asm/uaccess.h> #include <asm/system.h> @@ -184,7 +184,7 @@ static void reset_buffer_flags(struct tty_struct *tty) * Locking: ctrl_lock */ -static void n_tty_flush_buffer(struct tty_struct *tty) +void n_tty_flush_buffer(struct tty_struct *tty) { unsigned long flags; /* clear everything and unthrottle the driver */ @@ -200,6 +200,7 @@ static void n_tty_flush_buffer(struct tty_struct *tty) } spin_unlock_irqrestore(&tty->ctrl_lock, flags); } +EXPORT_SYMBOL_GPL(n_tty_flush_buffer); /** * n_tty_chars_in_buffer - report available bytes @@ -209,7 +210,7 @@ static void n_tty_flush_buffer(struct tty_struct *tty) * at this instant in time. */ -static ssize_t n_tty_chars_in_buffer(struct tty_struct *tty) +ssize_t n_tty_chars_in_buffer(struct tty_struct *tty) { unsigned long flags; ssize_t n = 0; @@ -225,6 +226,7 @@ static ssize_t n_tty_chars_in_buffer(struct tty_struct *tty) spin_unlock_irqrestore(&tty->read_lock, flags); return n; } +EXPORT_SYMBOL_GPL(n_tty_chars_in_buffer); /** * is_utf8_continuation - utf8 multibyte check @@ -346,7 +348,7 @@ static int opost(unsigned char c, struct tty_struct *tty) * the simple cases normally found and helps to generate blocks of * symbols for the console driver and thus improve performance. * - * Called from write_chan under the tty layer write lock. Relies + * Called from n_tty_write under the tty layer write lock. Relies * on lock_kernel for the tty->column state. */ @@ -895,13 +897,14 @@ handle_newline: * IO must be woken up */ -static void n_tty_write_wakeup(struct tty_struct *tty) +void n_tty_write_wakeup(struct tty_struct *tty) { if (tty->fasync) { set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); kill_fasync(&tty->fasync, SIGIO, POLL_OUT); } } +EXPORT_SYMBOL_GPL(n_tty_write_wakeup); /** * n_tty_receive_buf - data receive @@ -916,7 +919,7 @@ static void n_tty_write_wakeup(struct tty_struct *tty) * calls one at a time and in order (or using flush_to_ldisc) */ -static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, +void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, char *fp, int count) { const unsigned char *p; @@ -990,6 +993,7 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, if (tty->receive_room < TTY_THRESHOLD_THROTTLE) tty_throttle(tty); } +EXPORT_SYMBOL_GPL(n_tty_receive_buf); int is_ignored(int sig) { @@ -1009,7 +1013,7 @@ int is_ignored(int sig) * when the ldisc is closed. */ -static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) +void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) { if (!tty) return; @@ -1076,6 +1080,7 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) wake_up_interruptible(&tty->write_wait); wake_up_interruptible(&tty->read_wait); } +EXPORT_SYMBOL_GPL(n_tty_set_termios); /** * n_tty_close - close the ldisc for this tty @@ -1087,7 +1092,7 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) * ldisc methods are in progress. */ -static void n_tty_close(struct tty_struct *tty) +void n_tty_close(struct tty_struct *tty) { n_tty_flush_buffer(tty); if (tty->read_buf) { @@ -1095,6 +1100,7 @@ static void n_tty_close(struct tty_struct *tty) tty->read_buf = NULL; } } +EXPORT_SYMBOL_GPL(n_tty_close); /** * n_tty_open - open an ldisc @@ -1106,7 +1112,7 @@ static void n_tty_close(struct tty_struct *tty) * until a close. */ -static int n_tty_open(struct tty_struct *tty) +int n_tty_open(struct tty_struct *tty) { if (!tty) return -EINVAL; @@ -1125,6 +1131,7 @@ static int n_tty_open(struct tty_struct *tty) tty->closing = 0; return 0; } +EXPORT_SYMBOL_GPL(n_tty_open); static inline int input_available_p(struct tty_struct *tty, int amt) { @@ -1143,7 +1150,7 @@ static inline int input_available_p(struct tty_struct *tty, int amt) * @b: user data * @nr: size of data * - * Helper function to speed up read_chan. It is only called when + * Helper function to speed up n_tty_read. It is only called when * ICANON is off; it copies characters straight from the tty queue to * user space directly. It can be profitably called twice; once to * drain the space from the tail pointer to the (physical) end of the @@ -1210,7 +1217,7 @@ static int job_control(struct tty_struct *tty, struct file *file) if (file->f_op->write != redirected_tty_write && current->signal->tty == tty) { if (!tty->pgrp) - printk(KERN_ERR "read_chan: no tty->pgrp!\n"); + printk(KERN_ERR "n_tty_read: no tty->pgrp!\n"); else if (task_pgrp(current) != tty->pgrp) { if (is_ignored(SIGTTIN) || is_current_pgrp_orphaned()) @@ -1225,7 +1232,7 @@ static int job_control(struct tty_struct *tty, struct file *file) /** - * read_chan - read function for tty + * n_tty_read - read function for tty * @tty: tty device * @file: file object * @buf: userspace buffer pointer @@ -1239,7 +1246,7 @@ static int job_control(struct tty_struct *tty, struct file *file) * This code must be sure never to sleep through a hangup. */ -static ssize_t read_chan(struct tty_struct *tty, struct file *file, +ssize_t n_tty_read(struct tty_struct *tty, struct file *file, unsigned char __user *buf, size_t nr) { unsigned char __user *b = buf; @@ -1255,7 +1262,7 @@ static ssize_t read_chan(struct tty_struct *tty, struct file *file, do_it_again: if (!tty->read_buf) { - printk(KERN_ERR "n_tty_read_chan: read_buf == NULL?!?\n"); + printk(KERN_ERR "n_tty_read: read_buf == NULL?!?\n"); return -EIO; } @@ -1442,9 +1449,10 @@ do_it_again: n_tty_set_room(tty); return retval; } +EXPORT_SYMBOL_GPL(n_tty_read); /** - * write_chan - write function for tty + * n_tty_write - write function for tty * @tty: tty device * @file: file object * @buf: userspace buffer pointer @@ -1458,7 +1466,7 @@ do_it_again: * This code must be sure never to sleep through a hangup. */ -static ssize_t write_chan(struct tty_struct *tty, struct file *file, +ssize_t n_tty_write(struct tty_struct *tty, struct file *file, const unsigned char *buf, size_t nr) { const unsigned char *b = buf; @@ -1530,9 +1538,10 @@ break_out: remove_wait_queue(&tty->write_wait, &wait); return (b - buf) ? b - buf : retval; } +EXPORT_SYMBOL_GPL(n_tty_write); /** - * normal_poll - poll method for N_TTY + * n_tty_poll - poll method for N_TTY * @tty: terminal device * @file: file accessing it * @wait: poll table @@ -1545,7 +1554,7 @@ break_out: * Called without the kernel lock held - fine */ -static unsigned int normal_poll(struct tty_struct *tty, struct file *file, +unsigned int n_tty_poll(struct tty_struct *tty, struct file *file, poll_table *wait) { unsigned int mask = 0; @@ -1572,6 +1581,7 @@ static unsigned int normal_poll(struct tty_struct *tty, struct file *file, mask |= POLLOUT | POLLWRNORM; return mask; } +EXPORT_SYMBOL_GPL(n_tty_poll); struct tty_ldisc_ops tty_ldisc_N_TTY = { .magic = TTY_LDISC_MAGIC, @@ -1580,11 +1590,11 @@ struct tty_ldisc_ops tty_ldisc_N_TTY = { .close = n_tty_close, .flush_buffer = n_tty_flush_buffer, .chars_in_buffer = n_tty_chars_in_buffer, - .read = read_chan, - .write = write_chan, + .read = n_tty_read, + .write = n_tty_write, .ioctl = n_tty_ioctl, .set_termios = n_tty_set_termios, - .poll = normal_poll, + .poll = n_tty_poll, .receive_buf = n_tty_receive_buf, .write_wakeup = n_tty_write_wakeup }; diff --git a/include/linux/tty.h b/include/linux/tty.h index 0cbec74..826d695 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -13,6 +13,7 @@ #include <linux/tty_driver.h> #include <linux/tty_ldisc.h> #include <linux/mutex.h> +#include <linux/poll.h> #include <asm/system.h> @@ -393,6 +394,21 @@ extern void tty_ldisc_begin(void); /* This last one is just for the tty layer internals and shouldn't be used elsewhere */ extern void tty_ldisc_enable(struct tty_struct *tty); +extern void n_tty_flush_buffer(struct tty_struct *tty); +extern ssize_t n_tty_chars_in_buffer(struct tty_struct *tty); +extern void n_tty_write_wakeup(struct tty_struct *tty); +extern void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, + char *fp, int count); +extern void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old); +extern void n_tty_close(struct tty_struct *tty); +extern int n_tty_open(struct tty_struct *tty); +extern ssize_t n_tty_read(struct tty_struct *tty, struct file *file, + unsigned char __user *buf, size_t nr); +extern ssize_t n_tty_write(struct tty_struct *tty, struct file *file, + const unsigned char *buf, size_t nr); +extern unsigned int n_tty_poll(struct tty_struct *tty, struct file *file, + poll_table *wait); + /* n_tty.c */ extern struct tty_ldisc_ops tty_ldisc_N_TTY; -- 1.5.4.3
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