uml: move userspace code to userspace file

Move some code from a kernelspace file to a userspace file where it fits
better.  This enables some tidying which is the subject of a later patch.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c
index 4d438f36ea2e..249c877410d7 100644
--- a/arch/um/drivers/chan_user.c
+++ b/arch/um/drivers/chan_user.c
@@ -19,6 +19,55 @@
 #include "os.h"
 #include "choose-mode.h"
 #include "mode.h"
+#include "um_malloc.h"
+
+void generic_close(int fd, void *unused)
+{
+	os_close_file(fd);
+}
+
+int generic_read(int fd, char *c_out, void *unused)
+{
+	int n;
+
+	n = os_read_file(fd, c_out, sizeof(*c_out));
+
+	if(n == -EAGAIN)
+		return 0;
+	else if(n == 0)
+		return -EIO;
+	return n;
+}
+
+/* XXX Trivial wrapper around os_write_file */
+
+int generic_write(int fd, const char *buf, int n, void *unused)
+{
+	return os_write_file(fd, buf, n);
+}
+
+int generic_window_size(int fd, void *unused, unsigned short *rows_out,
+			unsigned short *cols_out)
+{
+	int rows, cols;
+	int ret;
+
+	ret = os_window_size(fd, &rows, &cols);
+	if(ret < 0)
+		return ret;
+
+	ret = ((*rows_out != rows) || (*cols_out != cols));
+
+	*rows_out = rows;
+	*cols_out = cols;
+
+	return ret;
+}
+
+void generic_free(void *data)
+{
+	kfree(data);
+}
 
 int generic_console_write(int fd, const char *buf, int n)
 {