[DVB]: Add compat ioctl handling.

Based upon a patch by Guido Guenther <agx@sigxcpu.org>.

Some of these ioctls had embedded time_t objects
or pointers, so needed translation.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 133 insertions, 0 deletions

diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 26300fccb4fc..f07e60f9e102 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -121,6 +121,11 @@
 
 #include <linux/hiddev.h>
 
+#include <linux/dvb/audio.h>
+#include <linux/dvb/dmx.h>
+#include <linux/dvb/frontend.h>
+#include <linux/dvb/video.h>
+
 #undef INCLUDES
 #endif
 
@@ -413,6 +418,128 @@ out:
         return err;
 }
 
+struct compat_dmx_event {
+        dmx_event_t     event;
+        compat_time_t   timeStamp;
+        union
+        {
+                dmx_scrambling_status_t scrambling;
+        } u;
+};
+
+static int do_dmx_get_event(unsigned int fd, unsigned int cmd, unsigned long arg)
+{
+        struct dmx_event kevent;
+        mm_segment_t old_fs = get_fs();
+        int err;
+
+        set_fs(KERNEL_DS);
+        err = sys_ioctl(fd, cmd, (unsigned long) &kevent);
+        set_fs(old_fs);
+
+        if (!err) {
+                struct compat_dmx_event __user *up = compat_ptr(arg);
+
+                err  = put_user(kevent.event, &up->event);
+                err |= put_user(kevent.timeStamp, &up->timeStamp);
+                err |= put_user(kevent.u.scrambling, &up->u.scrambling);
+                if (err)
+                        err = -EFAULT;
+        }
+
+        return err;
+}
+
+struct compat_video_event {
+        int32_t         type;
+        compat_time_t   timestamp;
+        union {
+                video_size_t size;
+                unsigned int frame_rate;
+        } u;
+};
+
+static int do_video_get_event(unsigned int fd, unsigned int cmd, unsigned long arg)
+{
+        struct video_event kevent;
+        mm_segment_t old_fs = get_fs();
+        int err;
+
+        set_fs(KERNEL_DS);
+        err = sys_ioctl(fd, cmd, (unsigned long) &kevent);
+        set_fs(old_fs);
+
+        if (!err) {
+                struct compat_video_event __user *up = compat_ptr(arg);
+
+                err  = put_user(kevent.type, &up->type);
+                err |= put_user(kevent.timestamp, &up->timestamp);
+                err |= put_user(kevent.u.size.w, &up->u.size.w);
+                err |= put_user(kevent.u.size.h, &up->u.size.h);
+                err |= put_user(kevent.u.size.aspect_ratio,
+                                &up->u.size.aspect_ratio);
+                if (err)
+                        err = -EFAULT;
+        }
+
+        return err;
+}
+
+struct compat_video_still_picture {
+        compat_uptr_t iFrame;
+        int32_t size;
+};
+
+static int do_video_stillpicture(unsigned int fd, unsigned int cmd, unsigned long arg)
+{
+        struct compat_video_still_picture __user *up;
+        struct video_still_picture __user *up_native;
+        compat_uptr_t fp;
+        int32_t size;
+        int err;
+
+        up = (struct compat_video_still_picture __user *) arg;
+        err  = get_user(fp, &up->iFrame);
+        err |= get_user(size, &up->size);
+        if (err)
+                return -EFAULT;
+
+        up_native =
+                compat_alloc_user_space(sizeof(struct video_still_picture));
+
+        put_user(compat_ptr(fp), &up_native->iFrame);
+        put_user(size, &up_native->size);
+
+        err = sys_ioctl(fd, cmd, (unsigned long) up_native);
+
+        return err;
+}
+
+struct compat_video_spu_palette {
+        int length;
+        compat_uptr_t palette;
+};
+
+static int do_video_set_spu_palette(unsigned int fd, unsigned int cmd, unsigned long arg)
+{
+        struct compat_video_spu_palette __user *up;
+        struct video_spu_palette __user *up_native;
+        compat_uptr_t palp;
+        int length, err;
+
+        up = (struct compat_video_spu_palette __user *) arg;
+        err  = get_user(palp, &up->palette);
+        err |= get_user(length, &up->length);
+
+        up_native = compat_alloc_user_space(sizeof(struct video_spu_palette));
+        put_user(compat_ptr(palp), &up_native->palette);
+        put_user(length, &up_native->length);
+
+        err = sys_ioctl(fd, cmd, (unsigned long) up_native);
+
+        return err;
+}
+
 #ifdef CONFIG_NET
 static int do_siocgstamp(unsigned int fd, unsigned int cmd, unsigned long arg)
 {
@@ -2954,5 +3081,11 @@ HANDLE_IOCTL(NCP_IOC_GETPRIVATEDATA_32, do_ncp_getprivatedata)
 HANDLE_IOCTL(NCP_IOC_SETPRIVATEDATA_32, do_ncp_setprivatedata)
 #endif
 
+/* dvb */
+HANDLE_IOCTL(DMX_GET_EVENT, do_dmx_get_event)
+HANDLE_IOCTL(VIDEO_GET_EVENT, do_video_get_event)
+HANDLE_IOCTL(VIDEO_STILLPICTURE, do_video_stillpicture)
+HANDLE_IOCTL(VIDEO_SET_SPU_PALETTE, do_video_set_spu_palette)
+
 #undef DECLARES
 #endif