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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/um/drivers/fd.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (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/fd.c')
-rw-r--r--kernel/arch/um/drivers/fd.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/kernel/arch/um/drivers/fd.c b/kernel/arch/um/drivers/fd.c
new file mode 100644
index 000000000..a13a427b9
--- /dev/null
+++ b/kernel/arch/um/drivers/fd.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <termios.h>
+#include "chan_user.h"
+#include <os.h>
+#include <um_malloc.h>
+
+struct fd_chan {
+ int fd;
+ int raw;
+ struct termios tt;
+ char str[sizeof("1234567890\0")];
+};
+
+static void *fd_init(char *str, int device, const struct chan_opts *opts)
+{
+ struct fd_chan *data;
+ char *end;
+ int n;
+
+ if (*str != ':') {
+ printk(UM_KERN_ERR "fd_init : channel type 'fd' must specify a "
+ "file descriptor\n");
+ return NULL;
+ }
+ str++;
+ n = strtoul(str, &end, 0);
+ if ((*end != '\0') || (end == str)) {
+ printk(UM_KERN_ERR "fd_init : couldn't parse file descriptor "
+ "'%s'\n", str);
+ return NULL;
+ }
+
+ data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
+ if (data == NULL)
+ return NULL;
+
+ *data = ((struct fd_chan) { .fd = n,
+ .raw = opts->raw });
+ return data;
+}
+
+static int fd_open(int input, int output, int primary, void *d, char **dev_out)
+{
+ struct fd_chan *data = d;
+ int err;
+
+ if (data->raw && isatty(data->fd)) {
+ CATCH_EINTR(err = tcgetattr(data->fd, &data->tt));
+ if (err)
+ return err;
+
+ err = raw(data->fd);
+ if (err)
+ return err;
+ }
+ sprintf(data->str, "%d", data->fd);
+ *dev_out = data->str;
+ return data->fd;
+}
+
+static void fd_close(int fd, void *d)
+{
+ struct fd_chan *data = d;
+ int err;
+
+ if (!data->raw || !isatty(fd))
+ return;
+
+ CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &data->tt));
+ if (err)
+ printk(UM_KERN_ERR "Failed to restore terminal state - "
+ "errno = %d\n", -err);
+ data->raw = 0;
+}
+
+const struct chan_ops fd_ops = {
+ .type = "fd",
+ .init = fd_init,
+ .open = fd_open,
+ .close = fd_close,
+ .read = generic_read,
+ .write = generic_write,
+ .console_write = generic_console_write,
+ .window_size = generic_window_size,
+ .free = generic_free,
+ .winch = 1,
+};