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Subject[PATCH 5/5] media: dvb: move compat handlers into drivers
Date
The VIDEO_STILLPICTURE is only implemented by one driver, while
VIDEO_GET_EVENT has two users in tree. In both cases, it is fairly
easy to handle the compat ioctls in the native handler rather
than relying on translation in fs/compat_ioctls.

In effect, this means that now the drivers implement both structure
layouts in both native and compat mode, but I don't see anything
wrong with that.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/media/pci/ivtv/ivtv-ioctl.c | 34 ++++++++++++-
drivers/media/pci/ttpci/av7110_av.c | 56 ++++++++++++++++++++-
fs/compat_ioctl.c | 78 -----------------------------
3 files changed, 87 insertions(+), 81 deletions(-)

diff --git a/drivers/media/pci/ivtv/ivtv-ioctl.c b/drivers/media/pci/ivtv/ivtv-ioctl.c
index 4cdc6d2be85d..785dbd4be420 100644
--- a/drivers/media/pci/ivtv/ivtv-ioctl.c
+++ b/drivers/media/pci/ivtv/ivtv-ioctl.c
@@ -36,6 +36,7 @@
#include <media/tveeprom.h>
#include <media/v4l2-event.h>
#ifdef CONFIG_VIDEO_IVTV_DEPRECATED_IOCTLS
+#include <linux/compat.h>
#include <linux/dvb/audio.h>
#include <linux/dvb/video.h>
#endif
@@ -1627,6 +1628,21 @@ static __inline__ void warn_deprecated_ioctl(const char *name)
pr_warn_once("warning: the %s ioctl is deprecated. Don't use it, as it will be removed soon\n",
name);
}
+
+#ifdef CONFIG_COMPAT
+struct compat_video_event {
+ __s32 type;
+ /* unused, make sure to use atomic time for y2038 if it ever gets used */
+ compat_long_t timestamp;
+ union {
+ video_size_t size;
+ unsigned int frame_rate; /* in frames per 1000sec */
+ unsigned char vsync_field; /* unknown/odd/even/progressive */
+ } u;
+};
+#define VIDEO_GET_EVENT32 _IOR('o', 28, struct compat_video_event)
+#endif
+
#endif

static int ivtv_decoder_ioctls(struct file *filp, unsigned int cmd, void *arg)
@@ -1749,7 +1765,13 @@ static int ivtv_decoder_ioctls(struct file *filp, unsigned int cmd, void *arg)
return ivtv_video_command(itv, id, dc, try);
}

+#ifdef CONFIG_COMPAT
+ case VIDEO_GET_EVENT32:
+#endif
case VIDEO_GET_EVENT: {
+#ifdef CONFIG_COMPAT
+ struct compat_video_event *ev32 = arg;
+#endif
struct video_event *ev = arg;
DEFINE_WAIT(wait);

@@ -1763,14 +1785,22 @@ static int ivtv_decoder_ioctls(struct file *filp, unsigned int cmd, void *arg)
if (test_and_clear_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags))
ev->type = VIDEO_EVENT_DECODER_STOPPED;
else if (test_and_clear_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags)) {
+ unsigned char vsync_field;
+
ev->type = VIDEO_EVENT_VSYNC;
- ev->u.vsync_field = test_bit(IVTV_F_I_EV_VSYNC_FIELD, &itv->i_flags) ?
+ vsync_field = test_bit(IVTV_F_I_EV_VSYNC_FIELD, &itv->i_flags) ?
VIDEO_VSYNC_FIELD_ODD : VIDEO_VSYNC_FIELD_EVEN;
if (itv->output_mode == OUT_UDMA_YUV &&
(itv->yuv_info.lace_mode & IVTV_YUV_MODE_MASK) ==
IVTV_YUV_MODE_PROGRESSIVE) {
- ev->u.vsync_field = VIDEO_VSYNC_FIELD_PROGRESSIVE;
+ vsync_field = VIDEO_VSYNC_FIELD_PROGRESSIVE;
}
+#ifdef CONFIG_COMPAT
+ if (cmd == VIDEO_GET_EVENT32)
+ ev32->u.vsync_field = vsync_field;
+ else
+#endif
+ ev->u.vsync_field = vsync_field;
}
if (ev->type)
return 0;
diff --git a/drivers/media/pci/ttpci/av7110_av.c b/drivers/media/pci/ttpci/av7110_av.c
index e738b2cef6f6..fd49ee5a380a 100644
--- a/drivers/media/pci/ttpci/av7110_av.c
+++ b/drivers/media/pci/ttpci/av7110_av.c
@@ -932,7 +932,6 @@ static int dvb_video_get_event (struct av7110 *av7110, struct video_event *event
return 0;
}

-
/******************************************************************************
* DVB device file operations
******************************************************************************/
@@ -1095,6 +1094,42 @@ static int play_iframe(struct av7110 *av7110, char __user *buf, unsigned int len
return 0;
}

+#ifdef CONFIG_COMPAT
+struct compat_video_still_picture {
+ compat_uptr_t iFrame;
+ int32_t size;
+};
+#define VIDEO_STILLPICTURE32 _IOW('o', 30, struct compat_video_still_picture)
+
+struct compat_video_event {
+ __s32 type;
+ /* unused, make sure to use atomic time for y2038 if it ever gets used */
+ compat_long_t timestamp;
+ union {
+ video_size_t size;
+ unsigned int frame_rate; /* in frames per 1000sec */
+ unsigned char vsync_field; /* unknown/odd/even/progressive */
+ } u;
+};
+#define VIDEO_GET_EVENT32 _IOR('o', 28, struct compat_video_event)
+
+static int dvb_compat_video_get_event(struct av7110 *av7110,
+ struct compat_video_event *event, int flags)
+{
+ struct video_event ev;
+ int ret;
+
+ ret = dvb_video_get_event(av7110, &ev, flags);
+
+ *event = (struct compat_video_event) {
+ .type = ev.type,
+ .timestamp = ev.timestamp,
+ .u.size = ev.u.size,
+ };
+
+ return ret;
+}
+#endif

static int dvb_video_ioctl(struct file *file,
unsigned int cmd, void *parg)
@@ -1184,6 +1219,12 @@ static int dvb_video_ioctl(struct file *file,
memcpy(parg, &av7110->videostate, sizeof(struct video_status));
break;

+#ifdef CONFIG_COMPAT
+ case VIDEO_GET_EVENT32:
+ ret = dvb_compat_video_get_event(av7110, parg, file->f_flags);
+ break;
+#endif
+
case VIDEO_GET_EVENT:
ret = dvb_video_get_event(av7110, parg, file->f_flags);
break;
@@ -1226,6 +1267,19 @@ static int dvb_video_ioctl(struct file *file,
1, (u16) arg);
break;

+#ifdef CONFIG_COMPAT
+ case VIDEO_STILLPICTURE32:
+ {
+ struct compat_video_still_picture *pic =
+ (struct compat_video_still_picture *) parg;
+ av7110->videostate.stream_source = VIDEO_SOURCE_MEMORY;
+ dvb_ringbuffer_flush_spinlock_wakeup(&av7110->avout);
+ ret = play_iframe(av7110, compat_ptr(pic->iFrame),
+ pic->size, file->f_flags & O_NONBLOCK);
+ break;
+ }
+#endif
+
case VIDEO_STILLPICTURE:
{
struct video_still_picture *pic =
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 7a1fac9cd1c2..5b2e22e7a316 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -103,11 +103,6 @@

#include <linux/hiddev.h>

-#define __DVB_CORE__
-#include <linux/dvb/audio.h>
-#include <linux/dvb/dmx.h>
-#include <linux/dvb/frontend.h>
-#include <linux/dvb/video.h>

#include <linux/sort.h>

@@ -133,73 +128,6 @@ static int do_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
return vfs_ioctl(file, cmd, arg);
}

-struct compat_video_event {
- int32_t type;
- compat_time_t timestamp;
- union {
- video_size_t size;
- unsigned int frame_rate;
- } u;
-};
-#define VIDEO_GET_EVENT32 _IOR('o', 28, struct compat_video_event)
-
-static int do_video_get_event(struct file *file,
- unsigned int cmd, struct compat_video_event __user *up)
-{
- struct video_event __user *kevent =
- compat_alloc_user_space(sizeof(*kevent));
- int err;
-
- if (kevent == NULL)
- return -EFAULT;
-
- err = do_ioctl(file, VIDEO_GET_EVENT, (unsigned long)kevent);
- if (!err) {
- err = convert_in_user(&kevent->type, &up->type);
- err |= convert_in_user(&kevent->timestamp, &up->timestamp);
- err |= convert_in_user(&kevent->u.size.w, &up->u.size.w);
- err |= convert_in_user(&kevent->u.size.h, &up->u.size.h);
- err |= convert_in_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;
-};
-#define VIDEO_STILLPICTURE32 _IOW('o', 30, struct compat_video_still_picture)
-
-static int do_video_stillpicture(struct file *file,
- unsigned int cmd, struct compat_video_still_picture __user *up)
-{
- struct video_still_picture __user *up_native;
- compat_uptr_t fp;
- int32_t size;
- int err;
-
- 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));
-
- err = put_user(compat_ptr(fp), &up_native->iFrame);
- err |= put_user(size, &up_native->size);
- if (err)
- return -EFAULT;
-
- err = do_ioctl(file, VIDEO_STILLPICTURE, (unsigned long) up_native);
-
- return err;
-}
-
#ifdef CONFIG_BLOCK
typedef struct sg_io_hdr32 {
compat_int_t interface_id; /* [i] 'S' for SCSI generic (required) */
@@ -1250,12 +1178,6 @@ static long do_ioctl_trans(unsigned int cmd,
case RTC_EPOCH_READ32:
case RTC_EPOCH_SET32:
return rtc_ioctl(file, cmd, argp);
-
- /* dvb */
- case VIDEO_GET_EVENT32:
- return do_video_get_event(file, cmd, argp);
- case VIDEO_STILLPICTURE32:
- return do_video_stillpicture(file, cmd, argp);
}

/*
--
2.18.0
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