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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/um/drivers/tty.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/um/drivers/tty.c')
-rw-r--r-- | kernel/arch/um/drivers/tty.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/kernel/arch/um/drivers/tty.c b/kernel/arch/um/drivers/tty.c new file mode 100644 index 000000000..eaa201bca --- /dev/null +++ b/kernel/arch/um/drivers/tty.c @@ -0,0 +1,81 @@ +/* + * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com) + * Licensed under the GPL + */ + +#include <errno.h> +#include <fcntl.h> +#include <termios.h> +#include "chan_user.h" +#include <os.h> +#include <um_malloc.h> + +struct tty_chan { + char *dev; + int raw; + struct termios tt; +}; + +static void *tty_chan_init(char *str, int device, const struct chan_opts *opts) +{ + struct tty_chan *data; + + if (*str != ':') { + printk(UM_KERN_ERR "tty_init : channel type 'tty' must specify " + "a device\n"); + return NULL; + } + str++; + + data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL); + if (data == NULL) + return NULL; + *data = ((struct tty_chan) { .dev = str, + .raw = opts->raw }); + + return data; +} + +static int tty_open(int input, int output, int primary, void *d, + char **dev_out) +{ + struct tty_chan *data = d; + int fd, err, mode = 0; + + if (input && output) + mode = O_RDWR; + else if (input) + mode = O_RDONLY; + else if (output) + mode = O_WRONLY; + + fd = open(data->dev, mode); + if (fd < 0) + return -errno; + + if (data->raw) { + CATCH_EINTR(err = tcgetattr(fd, &data->tt)); + if (err) + return err; + + err = raw(fd); + if (err) + return err; + } + + *dev_out = data->dev; + return fd; +} + +const struct chan_ops tty_ops = { + .type = "tty", + .init = tty_chan_init, + .open = tty_open, + .close = generic_close, + .read = generic_read, + .write = generic_write, + .console_write = generic_console_write, + .window_size = generic_window_size, + .free = generic_free, + .winch = 0, +}; |