Hi Sakari,
Thank you for the patch.
On Wednesday 04 May 2016 14:20:51 Sakari Ailus wrote:
> Preparation for refactoring media IOCTL handling to unify common parts.
>
> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> drivers/media/media-device.c | 52 ++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 49 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
> index 898a3cf..c24149d 100644
> --- a/drivers/media/media-device.c
> +++ b/drivers/media/media-device.c
> @@ -419,13 +419,33 @@ static long media_device_get_topology(struct
> media_device *mdev, return 0;
> }
>
> -static long media_device_ioctl(struct file *filp, unsigned int cmd,
> - unsigned long arg)
> +#define MEDIA_IOC(__cmd) \
> + [_IOC_NR(MEDIA_IOC_##__cmd)] = { .cmd = MEDIA_IOC_##__cmd }
> +
> +/* the table is indexed by _IOC_NR(cmd) */
> +struct media_ioctl_info {
> + unsigned int cmd;
> +};
> +
> +static inline long is_valid_ioctl(const struct media_ioctl_info *info,
> + unsigned int len, unsigned int cmd)
> +{
> + return (_IOC_NR(cmd) >= len
> + || info[_IOC_NR(cmd)].cmd != cmd) ? -ENOIOCTLCMD : 0;
> +}
> +
> +static long __media_device_ioctl(
> + struct file *filp, unsigned int cmd, void __user *arg,
> + const struct media_ioctl_info *info_array, unsigned int info_array_len)
> {
> struct media_devnode *devnode = media_devnode_data(filp);
> struct media_device *dev = to_media_device(devnode);
> long ret;
>
> + ret = is_valid_ioctl(info_array, info_array_len, cmd);
> + if (ret)
> + return ret;
> +
> mutex_lock(&dev->graph_mutex);
> switch (cmd) {
> case MEDIA_IOC_DEVICE_INFO:
> @@ -461,6 +481,22 @@ static long media_device_ioctl(struct file *filp,
> unsigned int cmd, return ret;
> }
>
> +static const struct media_ioctl_info ioctl_info[] = {
> + MEDIA_IOC(DEVICE_INFO),
> + MEDIA_IOC(ENUM_ENTITIES),
> + MEDIA_IOC(ENUM_LINKS),
> + MEDIA_IOC(SETUP_LINK),
> + MEDIA_IOC(G_TOPOLOGY),
> +};
> +
> +static long media_device_ioctl(struct file *filp, unsigned int cmd,
> + unsigned long arg)
> +{
> + return __media_device_ioctl(
> + filp, cmd, (void __user *)arg,
> + ioctl_info, ARRAY_SIZE(ioctl_info));
> +}
> +
> #ifdef CONFIG_COMPAT
>
> struct media_links_enum32 {
> @@ -491,6 +527,14 @@ static long media_device_enum_links32(struct
> media_device *mdev,
>
> #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct
media_links_enum32)
>
> +static const struct media_ioctl_info compat_ioctl_info[] = {
> + MEDIA_IOC(DEVICE_INFO),
> + MEDIA_IOC(ENUM_ENTITIES),
> + MEDIA_IOC(ENUM_LINKS32),
> + MEDIA_IOC(SETUP_LINK),
> + MEDIA_IOC(G_TOPOLOGY),
> +};
> +
> static long media_device_compat_ioctl(struct file *filp, unsigned int cmd,
> unsigned long arg)
> {
> @@ -503,7 +547,9 @@ static long media_device_compat_ioctl(struct file *filp,
> unsigned int cmd, case MEDIA_IOC_ENUM_ENTITIES:
> case MEDIA_IOC_SETUP_LINK:
> case MEDIA_IOC_G_TOPOLOGY:
> - return media_device_ioctl(filp, cmd, arg);
> + return __media_device_ioctl(
> + filp, cmd, (void __user *)arg,
> + compat_ioctl_info, ARRAY_SIZE(compat_ioctl_info));
>
> case MEDIA_IOC_ENUM_LINKS32:
> mutex_lock(&dev->graph_mutex);
--
Regards,
Laurent Pinchart
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