forked from rrcarlosr/Jetpack
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/*
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* Copyright (c) 2015 Stefan Assmann <sassmann@kpanic.de>
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* Copyright (c) 2015 Hauke Mehrtens <hauke@hauke-m.de>
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*
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* Backport functionality introduced in Linux 4.1.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/netdevice.h>
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#include <linux/tty.h>
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netdev_features_t passthru_features_check(struct sk_buff *skb,
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struct net_device *dev,
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netdev_features_t features)
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{
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return features;
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}
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EXPORT_SYMBOL_GPL(passthru_features_check);
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#ifdef CONFIG_TTY
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#if LINUX_VERSION_IS_GEQ(4,0,0)
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static void unset_locked_termios(struct ktermios *termios,
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struct ktermios *old,
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struct ktermios *locked)
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{
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int i;
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#define NOSET_MASK(x, y, z) (x = ((x) & ~(z)) | ((y) & (z)))
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if (!locked) {
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printk(KERN_WARNING "Warning?!? termios_locked is NULL.\n");
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return;
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}
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NOSET_MASK(termios->c_iflag, old->c_iflag, locked->c_iflag);
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NOSET_MASK(termios->c_oflag, old->c_oflag, locked->c_oflag);
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NOSET_MASK(termios->c_cflag, old->c_cflag, locked->c_cflag);
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NOSET_MASK(termios->c_lflag, old->c_lflag, locked->c_lflag);
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termios->c_line = locked->c_line ? old->c_line : termios->c_line;
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for (i = 0; i < NCCS; i++)
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termios->c_cc[i] = locked->c_cc[i] ?
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old->c_cc[i] : termios->c_cc[i];
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/* FIXME: What should we do for i/ospeed */
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}
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int tty_set_termios(struct tty_struct *tty, struct ktermios *new_termios)
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{
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struct ktermios old_termios;
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struct tty_ldisc *ld;
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WARN_ON(tty->driver->type == TTY_DRIVER_TYPE_PTY &&
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tty->driver->subtype == PTY_TYPE_MASTER);
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/*
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* Perform the actual termios internal changes under lock.
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*/
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/* FIXME: we need to decide on some locking/ordering semantics
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for the set_termios notification eventually */
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down_write(&tty->termios_rwsem);
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old_termios = tty->termios;
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tty->termios = *new_termios;
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unset_locked_termios(&tty->termios, &old_termios, &tty->termios_locked);
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if (tty->ops->set_termios)
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tty->ops->set_termios(tty, &old_termios);
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else
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tty_termios_copy_hw(&tty->termios, &old_termios);
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ld = tty_ldisc_ref(tty);
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if (ld != NULL) {
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if (ld->ops->set_termios)
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ld->ops->set_termios(tty, &old_termios);
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tty_ldisc_deref(ld);
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}
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up_write(&tty->termios_rwsem);
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return 0;
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}
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EXPORT_SYMBOL_GPL(tty_set_termios);
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#endif /* LINUX_VERSION_IS_GEQ(4,0,0) */
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#endif /* CONFIG_TTY */
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