termios: uninline conversion helpers

default go into drivers/tty/tty_ioctl.c, unusual - into
arch/*/kernel/termios.c (only alpha and sparc have those).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/YxDmeUBHo0s/Ew8b@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 118 insertions, 1 deletions

diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index d3a0e072ebe8..620c0c5b749b 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -87,12 +87,13 @@ obj-$(CONFIG_SPARC64_SMP) += hvtramp.o
 obj-y                     += auxio_$(BITS).o
 obj-$(CONFIG_SUN_PM)      += apc.o pmc.o
 
+obj-y                     += termios.o
+
 obj-$(CONFIG_MODULES)     += module.o
 obj-$(CONFIG_MODULES)     += sparc_ksyms.o
 obj-$(CONFIG_SPARC_LED)   += led.o
 obj-$(CONFIG_KGDB)        += kgdb_$(BITS).o
 
-
 obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
 obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
 
@@ -104,6 +105,7 @@ obj-$(CONFIG_SPARC64_PCI)    += pci_psycho.o pci_sabre.o pci_schizo.o
 obj-$(CONFIG_SPARC64_PCI)    += pci_sun4v.o pci_sun4v_asm.o pci_fire.o
 obj-$(CONFIG_SPARC64_PCI_MSI) += pci_msi.o
 
+
 obj-$(CONFIG_COMPAT)         += sys32.o sys_sparc32.o signal32.o
 
 obj-$(CONFIG_US3_MC)    += chmc.o
diff --git a/arch/sparc/kernel/termios.c b/arch/sparc/kernel/termios.c
new file mode 100644
index 000000000000..97e23d4ae2e2
--- /dev/null
+++ b/arch/sparc/kernel/termios.c
@@ -0,0 +1,115 @@
+#include <linux/uaccess.h>
+#include <linux/termios.h>
+
+/*
+ * c_cc characters in the termio structure.  Oh, how I love being
+ * backwardly compatible.  Notice that character 4 and 5 are
+ * interpreted differently depending on whether ICANON is set in
+ * c_lflag.  If it's set, they are used as _VEOF and _VEOL, otherwise
+ * as _VMIN and V_TIME.  This is for compatibility with OSF/1 (which
+ * is compatible with sysV)...
+ */
+#define _VMIN	4
+#define _VTIME	5
+
+int kernel_termios_to_user_termio(struct termio __user *termio,
+						struct ktermios *termios)
+{
+	struct termio v;
+	memset(&v, 0, sizeof(struct termio));
+	v.c_iflag = termios->c_iflag;
+	v.c_oflag = termios->c_oflag;
+	v.c_cflag = termios->c_cflag;
+	v.c_lflag = termios->c_lflag;
+	v.c_line = termios->c_line;
+	memcpy(v.c_cc, termios->c_cc, NCC);
+	if (!(v.c_lflag & ICANON)) {
+		v.c_cc[_VMIN] = termios->c_cc[VMIN];
+		v.c_cc[_VTIME] = termios->c_cc[VTIME];
+	}
+	return copy_to_user(termio, &v, sizeof(struct termio));
+}
+
+int user_termios_to_kernel_termios(struct ktermios *k,
+						 struct termios2 __user *u)
+{
+	int err;
+	err  = get_user(k->c_iflag, &u->c_iflag);
+	err |= get_user(k->c_oflag, &u->c_oflag);
+	err |= get_user(k->c_cflag, &u->c_cflag);
+	err |= get_user(k->c_lflag, &u->c_lflag);
+	err |= get_user(k->c_line,  &u->c_line);
+	err |= copy_from_user(k->c_cc, u->c_cc, NCCS);
+	if (k->c_lflag & ICANON) {
+		err |= get_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
+		err |= get_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
+	} else {
+		err |= get_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);
+		err |= get_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
+	}
+	err |= get_user(k->c_ispeed,  &u->c_ispeed);
+	err |= get_user(k->c_ospeed,  &u->c_ospeed);
+	return err;
+}
+
+int kernel_termios_to_user_termios(struct termios2 __user *u,
+						 struct ktermios *k)
+{
+	int err;
+	err  = put_user(k->c_iflag, &u->c_iflag);
+	err |= put_user(k->c_oflag, &u->c_oflag);
+	err |= put_user(k->c_cflag, &u->c_cflag);
+	err |= put_user(k->c_lflag, &u->c_lflag);
+	err |= put_user(k->c_line, &u->c_line);
+	err |= copy_to_user(u->c_cc, k->c_cc, NCCS);
+	if (!(k->c_lflag & ICANON)) {
+		err |= put_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);
+		err |= put_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
+	} else {
+		err |= put_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
+		err |= put_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
+	}
+	err |= put_user(k->c_ispeed, &u->c_ispeed);
+	err |= put_user(k->c_ospeed, &u->c_ospeed);
+	return err;
+}
+
+int user_termios_to_kernel_termios_1(struct ktermios *k,
+						 struct termios __user *u)
+{
+	int err;
+	err  = get_user(k->c_iflag, &u->c_iflag);
+	err |= get_user(k->c_oflag, &u->c_oflag);
+	err |= get_user(k->c_cflag, &u->c_cflag);
+	err |= get_user(k->c_lflag, &u->c_lflag);
+	err |= get_user(k->c_line,  &u->c_line);
+	err |= copy_from_user(k->c_cc, u->c_cc, NCCS);
+	if (k->c_lflag & ICANON) {
+		err |= get_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
+		err |= get_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
+	} else {
+		err |= get_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);
+		err |= get_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
+	}
+	return err;
+}
+
+int kernel_termios_to_user_termios_1(struct termios __user *u,
+						 struct ktermios *k)
+{
+	int err;
+	err  = put_user(k->c_iflag, &u->c_iflag);
+	err |= put_user(k->c_oflag, &u->c_oflag);
+	err |= put_user(k->c_cflag, &u->c_cflag);
+	err |= put_user(k->c_lflag, &u->c_lflag);
+	err |= put_user(k->c_line, &u->c_line);
+	err |= copy_to_user(u->c_cc, k->c_cc, NCCS);
+	if (!(k->c_lflag & ICANON)) {
+		err |= put_user(k->c_cc[VMIN],  &u->c_cc[_VMIN]);
+		err |= put_user(k->c_cc[VTIME], &u->c_cc[_VTIME]);
+	} else {
+		err |= put_user(k->c_cc[VEOF], &u->c_cc[VEOF]);
+		err |= put_user(k->c_cc[VEOL], &u->c_cc[VEOL]);
+	}
+	return err;
+}