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mirror_ubuntu-kernels/drivers/media/v4l2-core/v4l2-compat-ioctl32.c

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lowlatency-hwe-6.8-next
2024-07-02 00:48:40 +03:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* ioctl32.c: Conversion between 32bit and 64bit native ioctls.
* Separated from fs stuff by Arnd Bergmann <arnd@arndb.de>
*
* Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com)
* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 2001,2002 Andi Kleen, SuSE Labs
* Copyright (C) 2003 Pavel Machek (pavel@ucw.cz)
* Copyright (C) 2005 Philippe De Muyter (phdm@macqel.be)
* Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
*
* These routines maintain argument size conversion between 32bit and 64bit
* ioctls.
*/
#include <linux/compat.h>
#include <linux/module.h>
#include <linux/videodev2.h>
#include <linux/v4l2-subdev.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-ioctl.h>
/*
* Per-ioctl data copy handlers.
*
* Those come in pairs, with a get_v4l2_foo() and a put_v4l2_foo() routine,
* where "v4l2_foo" is the name of the V4L2 struct.
*
* They basically get two __user pointers, one with a 32-bits struct that
* came from the userspace call and a 64-bits struct, also allocated as
* userspace, but filled internally by do_video_ioctl().
*
* For ioctls that have pointers inside it, the functions will also
* receive an ancillary buffer with extra space, used to pass extra
* data to the routine.
*/
struct v4l2_window32 {
struct v4l2_rect w;
__u32 field; /* enum v4l2_field */
__u32 chromakey;
compat_caddr_t clips; /* always NULL */
__u32 clipcount; /* always 0 */
compat_caddr_t bitmap; /* always NULL */
__u8 global_alpha;
};
static int get_v4l2_window32(struct v4l2_window *p64,
struct v4l2_window32 __user *p32)
{
struct v4l2_window32 w32;
if (copy_from_user(&w32, p32, sizeof(w32)))
return -EFAULT;
*p64 = (struct v4l2_window) {
.w = w32.w,
.field = w32.field,
.chromakey = w32.chromakey,
.clips = NULL,
.clipcount = 0,
.bitmap = NULL,
.global_alpha = w32.global_alpha,
};
return 0;
}
static int put_v4l2_window32(struct v4l2_window *p64,
struct v4l2_window32 __user *p32)
{
struct v4l2_window32 w32;
memset(&w32, 0, sizeof(w32));
w32 = (struct v4l2_window32) {
.w = p64->w,
.field = p64->field,
.chromakey = p64->chromakey,
.clips = 0,
.clipcount = 0,
.bitmap = 0,
.global_alpha = p64->global_alpha,
};
if (copy_to_user(p32, &w32, sizeof(w32)))
return -EFAULT;
return 0;
}
struct v4l2_format32 {
__u32 type; /* enum v4l2_buf_type */
union {
struct v4l2_pix_format pix;
struct v4l2_pix_format_mplane pix_mp;
struct v4l2_window32 win;
struct v4l2_vbi_format vbi;
struct v4l2_sliced_vbi_format sliced;
struct v4l2_sdr_format sdr;
struct v4l2_meta_format meta;
__u8 raw_data[200]; /* user-defined */
} fmt;
};
/**
* struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
* @index: on return, index of the first created buffer
* @count: entry: number of requested buffers,
* return: number of created buffers
* @memory: buffer memory type
* @format: frame format, for which buffers are requested
* @capabilities: capabilities of this buffer type.
* @flags: additional buffer management attributes (ignored unless the
* queue has V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS capability and
* configured for MMAP streaming I/O).
* @max_num_buffers: if V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS capability flag is set
* this field indicate the maximum possible number of buffers
* for this queue.
* @reserved: future extensions
*/
struct v4l2_create_buffers32 {
__u32 index;
__u32 count;
__u32 memory; /* enum v4l2_memory */
struct v4l2_format32 format;
__u32 capabilities;
__u32 flags;
__u32 max_num_buffers;
__u32 reserved[5];
};
static int get_v4l2_format32(struct v4l2_format *p64,
struct v4l2_format32 __user *p32)
{
if (get_user(p64->type, &p32->type))
return -EFAULT;
switch (p64->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
return copy_from_user(&p64->fmt.pix, &p32->fmt.pix,
sizeof(p64->fmt.pix)) ? -EFAULT : 0;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
return copy_from_user(&p64->fmt.pix_mp, &p32->fmt.pix_mp,
sizeof(p64->fmt.pix_mp)) ? -EFAULT : 0;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
return get_v4l2_window32(&p64->fmt.win, &p32->fmt.win);
case V4L2_BUF_TYPE_VBI_CAPTURE:
case V4L2_BUF_TYPE_VBI_OUTPUT:
return copy_from_user(&p64->fmt.vbi, &p32->fmt.vbi,
sizeof(p64->fmt.vbi)) ? -EFAULT : 0;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
return copy_from_user(&p64->fmt.sliced, &p32->fmt.sliced,
sizeof(p64->fmt.sliced)) ? -EFAULT : 0;
case V4L2_BUF_TYPE_SDR_CAPTURE:
case V4L2_BUF_TYPE_SDR_OUTPUT:
return copy_from_user(&p64->fmt.sdr, &p32->fmt.sdr,
sizeof(p64->fmt.sdr)) ? -EFAULT : 0;
case V4L2_BUF_TYPE_META_CAPTURE:
case V4L2_BUF_TYPE_META_OUTPUT:
return copy_from_user(&p64->fmt.meta, &p32->fmt.meta,
sizeof(p64->fmt.meta)) ? -EFAULT : 0;
default:
return -EINVAL;
}
}
static int get_v4l2_create32(struct v4l2_create_buffers *p64,
struct v4l2_create_buffers32 __user *p32)
{
if (copy_from_user(p64, p32,
offsetof(struct v4l2_create_buffers32, format)))
return -EFAULT;
if (copy_from_user(&p64->flags, &p32->flags, sizeof(p32->flags)))
return -EFAULT;
if (copy_from_user(&p64->max_num_buffers, &p32->max_num_buffers,
sizeof(p32->max_num_buffers)))
return -EFAULT;
return get_v4l2_format32(&p64->format, &p32->format);
}
static int put_v4l2_format32(struct v4l2_format *p64,
struct v4l2_format32 __user *p32)
{
switch (p64->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
return copy_to_user(&p32->fmt.pix, &p64->fmt.pix,
sizeof(p64->fmt.pix)) ? -EFAULT : 0;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
return copy_to_user(&p32->fmt.pix_mp, &p64->fmt.pix_mp,
sizeof(p64->fmt.pix_mp)) ? -EFAULT : 0;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
return put_v4l2_window32(&p64->fmt.win, &p32->fmt.win);
case V4L2_BUF_TYPE_VBI_CAPTURE:
case V4L2_BUF_TYPE_VBI_OUTPUT:
return copy_to_user(&p32->fmt.vbi, &p64->fmt.vbi,
sizeof(p64->fmt.vbi)) ? -EFAULT : 0;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
return copy_to_user(&p32->fmt.sliced, &p64->fmt.sliced,
sizeof(p64->fmt.sliced)) ? -EFAULT : 0;
case V4L2_BUF_TYPE_SDR_CAPTURE:
case V4L2_BUF_TYPE_SDR_OUTPUT:
return copy_to_user(&p32->fmt.sdr, &p64->fmt.sdr,
sizeof(p64->fmt.sdr)) ? -EFAULT : 0;
case V4L2_BUF_TYPE_META_CAPTURE:
case V4L2_BUF_TYPE_META_OUTPUT:
return copy_to_user(&p32->fmt.meta, &p64->fmt.meta,
sizeof(p64->fmt.meta)) ? -EFAULT : 0;
default:
return -EINVAL;
}
}
static int put_v4l2_create32(struct v4l2_create_buffers *p64,
struct v4l2_create_buffers32 __user *p32)
{
if (copy_to_user(p32, p64,
offsetof(struct v4l2_create_buffers32, format)) ||
put_user(p64->capabilities, &p32->capabilities) ||
put_user(p64->flags, &p32->flags) ||
put_user(p64->max_num_buffers, &p32->max_num_buffers) ||
copy_to_user(p32->reserved, p64->reserved, sizeof(p64->reserved)))
return -EFAULT;
return put_v4l2_format32(&p64->format, &p32->format);
}
struct v4l2_standard32 {
__u32 index;
compat_u64 id;
__u8 name[24];
struct v4l2_fract frameperiod; /* Frames, not fields */
__u32 framelines;
__u32 reserved[4];
};
static int get_v4l2_standard32(struct v4l2_standard *p64,
struct v4l2_standard32 __user *p32)
{
/* other fields are not set by the user, nor used by the driver */
return get_user(p64->index, &p32->index);
}
static int put_v4l2_standard32(struct v4l2_standard *p64,
struct v4l2_standard32 __user *p32)
{
if (put_user(p64->index, &p32->index) ||
put_user(p64->id, &p32->id) ||
copy_to_user(p32->name, p64->name, sizeof(p32->name)) ||
copy_to_user(&p32->frameperiod, &p64->frameperiod,
sizeof(p32->frameperiod)) ||
put_user(p64->framelines, &p32->framelines) ||
copy_to_user(p32->reserved, p64->reserved, sizeof(p32->reserved)))
return -EFAULT;
return 0;
}
struct v4l2_plane32 {
__u32 bytesused;
__u32 length;
union {
__u32 mem_offset;
compat_long_t userptr;
__s32 fd;
} m;
__u32 data_offset;
__u32 reserved[11];
};
/*
* This is correct for all architectures including i386, but not x32,
* which has different alignment requirements for timestamp
*/
struct v4l2_buffer32 {
__u32 index;
__u32 type; /* enum v4l2_buf_type */
__u32 bytesused;
__u32 flags;
__u32 field; /* enum v4l2_field */
struct {
compat_s64 tv_sec;
compat_s64 tv_usec;
} timestamp;
struct v4l2_timecode timecode;
__u32 sequence;
/* memory location */
__u32 memory; /* enum v4l2_memory */
union {
__u32 offset;
compat_long_t userptr;
compat_caddr_t planes;
__s32 fd;
} m;
__u32 length;
__u32 reserved2;
__s32 request_fd;
};
#ifdef CONFIG_COMPAT_32BIT_TIME
struct v4l2_buffer32_time32 {
__u32 index;
__u32 type; /* enum v4l2_buf_type */
__u32 bytesused;
__u32 flags;
__u32 field; /* enum v4l2_field */
struct old_timeval32 timestamp;
struct v4l2_timecode timecode;
__u32 sequence;
/* memory location */
__u32 memory; /* enum v4l2_memory */
union {
__u32 offset;
compat_long_t userptr;
compat_caddr_t planes;
__s32 fd;
} m;
__u32 length;
__u32 reserved2;
__s32 request_fd;
};
#endif
static int get_v4l2_plane32(struct v4l2_plane *p64,
struct v4l2_plane32 __user *p32,
enum v4l2_memory memory)
{
struct v4l2_plane32 plane32;
typeof(p64->m) m = {};
if (copy_from_user(&plane32, p32, sizeof(plane32)))
return -EFAULT;
switch (memory) {
case V4L2_MEMORY_MMAP:
case V4L2_MEMORY_OVERLAY:
m.mem_offset = plane32.m.mem_offset;
break;
case V4L2_MEMORY_USERPTR:
m.userptr = (unsigned long)compat_ptr(plane32.m.userptr);
break;
case V4L2_MEMORY_DMABUF:
m.fd = plane32.m.fd;
break;
}
memset(p64, 0, sizeof(*p64));
*p64 = (struct v4l2_plane) {
.bytesused = plane32.bytesused,
.length = plane32.length,
.m = m,
.data_offset = plane32.data_offset,
};
return 0;
}
static int put_v4l2_plane32(struct v4l2_plane *p64,
struct v4l2_plane32 __user *p32,
enum v4l2_memory memory)
{
struct v4l2_plane32 plane32;
memset(&plane32, 0, sizeof(plane32));
plane32 = (struct v4l2_plane32) {
.bytesused = p64->bytesused,
.length = p64->length,
.data_offset = p64->data_offset,
};
switch (memory) {
case V4L2_MEMORY_MMAP:
case V4L2_MEMORY_OVERLAY:
plane32.m.mem_offset = p64->m.mem_offset;
break;
case V4L2_MEMORY_USERPTR:
plane32.m.userptr = (uintptr_t)(p64->m.userptr);
break;
case V4L2_MEMORY_DMABUF:
plane32.m.fd = p64->m.fd;
break;
}
if (copy_to_user(p32, &plane32, sizeof(plane32)))
return -EFAULT;
return 0;
}
static int get_v4l2_buffer32(struct v4l2_buffer *vb,
struct v4l2_buffer32 __user *arg)
{
struct v4l2_buffer32 vb32;
if (copy_from_user(&vb32, arg, sizeof(vb32)))
return -EFAULT;
memset(vb, 0, sizeof(*vb));
*vb = (struct v4l2_buffer) {
.index = vb32.index,
.type = vb32.type,
.bytesused = vb32.bytesused,
.flags = vb32.flags,
.field = vb32.field,
.timestamp.tv_sec = vb32.timestamp.tv_sec,
.timestamp.tv_usec = vb32.timestamp.tv_usec,
.timecode = vb32.timecode,
.sequence = vb32.sequence,
.memory = vb32.memory,
.m.offset = vb32.m.offset,
.length = vb32.length,
.request_fd = vb32.request_fd,
};
switch (vb->memory) {
case V4L2_MEMORY_MMAP:
case V4L2_MEMORY_OVERLAY:
vb->m.offset = vb32.m.offset;
break;
case V4L2_MEMORY_USERPTR:
vb->m.userptr = (unsigned long)compat_ptr(vb32.m.userptr);
break;
case V4L2_MEMORY_DMABUF:
vb->m.fd = vb32.m.fd;
break;
}
if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
vb->m.planes = (void __force *)
compat_ptr(vb32.m.planes);
return 0;
}
#ifdef CONFIG_COMPAT_32BIT_TIME
static int get_v4l2_buffer32_time32(struct v4l2_buffer *vb,
struct v4l2_buffer32_time32 __user *arg)
{
struct v4l2_buffer32_time32 vb32;
if (copy_from_user(&vb32, arg, sizeof(vb32)))
return -EFAULT;
*vb = (struct v4l2_buffer) {
.index = vb32.index,
.type = vb32.type,
.bytesused = vb32.bytesused,
.flags = vb32.flags,
.field = vb32.field,
.timestamp.tv_sec = vb32.timestamp.tv_sec,
.timestamp.tv_usec = vb32.timestamp.tv_usec,
.timecode = vb32.timecode,
.sequence = vb32.sequence,
.memory = vb32.memory,
.m.offset = vb32.m.offset,
.length = vb32.length,
.request_fd = vb32.request_fd,
};
switch (vb->memory) {
case V4L2_MEMORY_MMAP:
case V4L2_MEMORY_OVERLAY:
vb->m.offset = vb32.m.offset;
break;
case V4L2_MEMORY_USERPTR:
vb->m.userptr = (unsigned long)compat_ptr(vb32.m.userptr);
break;
case V4L2_MEMORY_DMABUF:
vb->m.fd = vb32.m.fd;
break;
}
if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
vb->m.planes = (void __force *)
compat_ptr(vb32.m.planes);
return 0;
}
#endif
static int put_v4l2_buffer32(struct v4l2_buffer *vb,
struct v4l2_buffer32 __user *arg)
{
struct v4l2_buffer32 vb32;
memset(&vb32, 0, sizeof(vb32));
vb32 = (struct v4l2_buffer32) {
.index = vb->index,
.type = vb->type,
.bytesused = vb->bytesused,
.flags = vb->flags,
.field = vb->field,
.timestamp.tv_sec = vb->timestamp.tv_sec,
.timestamp.tv_usec = vb->timestamp.tv_usec,
.timecode = vb->timecode,
.sequence = vb->sequence,
.memory = vb->memory,
.m.offset = vb->m.offset,
.length = vb->length,
.request_fd = vb->request_fd,
};
switch (vb->memory) {
case V4L2_MEMORY_MMAP:
case V4L2_MEMORY_OVERLAY:
vb32.m.offset = vb->m.offset;
break;
case V4L2_MEMORY_USERPTR:
vb32.m.userptr = (uintptr_t)(vb->m.userptr);
break;
case V4L2_MEMORY_DMABUF:
vb32.m.fd = vb->m.fd;
break;
}
if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
vb32.m.planes = (uintptr_t)vb->m.planes;
if (copy_to_user(arg, &vb32, sizeof(vb32)))
return -EFAULT;
return 0;
}
#ifdef CONFIG_COMPAT_32BIT_TIME
static int put_v4l2_buffer32_time32(struct v4l2_buffer *vb,
struct v4l2_buffer32_time32 __user *arg)
{
struct v4l2_buffer32_time32 vb32;
memset(&vb32, 0, sizeof(vb32));
vb32 = (struct v4l2_buffer32_time32) {
.index = vb->index,
.type = vb->type,
.bytesused = vb->bytesused,
.flags = vb->flags,
.field = vb->field,
.timestamp.tv_sec = vb->timestamp.tv_sec,
.timestamp.tv_usec = vb->timestamp.tv_usec,
.timecode = vb->timecode,
.sequence = vb->sequence,
.memory = vb->memory,
.m.offset = vb->m.offset,
.length = vb->length,
.request_fd = vb->request_fd,
};
switch (vb->memory) {
case V4L2_MEMORY_MMAP:
case V4L2_MEMORY_OVERLAY:
vb32.m.offset = vb->m.offset;
break;
case V4L2_MEMORY_USERPTR:
vb32.m.userptr = (uintptr_t)(vb->m.userptr);
break;
case V4L2_MEMORY_DMABUF:
vb32.m.fd = vb->m.fd;
break;
}
if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
vb32.m.planes = (uintptr_t)vb->m.planes;
if (copy_to_user(arg, &vb32, sizeof(vb32)))
return -EFAULT;
return 0;
}
#endif
struct v4l2_framebuffer32 {
__u32 capability;
__u32 flags;
compat_caddr_t base;
struct {
__u32 width;
__u32 height;
__u32 pixelformat;
__u32 field;
__u32 bytesperline;
__u32 sizeimage;
__u32 colorspace;
__u32 priv;
} fmt;
};
static int get_v4l2_framebuffer32(struct v4l2_framebuffer *p64,
struct v4l2_framebuffer32 __user *p32)
{
if (get_user(p64->capability, &p32->capability) ||
get_user(p64->flags, &p32->flags) ||
copy_from_user(&p64->fmt, &p32->fmt, sizeof(p64->fmt)))
return -EFAULT;
p64->base = NULL;
return 0;
}
static int put_v4l2_framebuffer32(struct v4l2_framebuffer *p64,
struct v4l2_framebuffer32 __user *p32)
{
if (put_user((uintptr_t)p64->base, &p32->base) ||
put_user(p64->capability, &p32->capability) ||
put_user(p64->flags, &p32->flags) ||
copy_to_user(&p32->fmt, &p64->fmt, sizeof(p64->fmt)))
return -EFAULT;
return 0;
}
struct v4l2_input32 {
__u32 index; /* Which input */
__u8 name[32]; /* Label */
__u32 type; /* Type of input */
__u32 audioset; /* Associated audios (bitfield) */
__u32 tuner; /* Associated tuner */
compat_u64 std;
__u32 status;
__u32 capabilities;
__u32 reserved[3];
};
/*
* The 64-bit v4l2_input struct has extra padding at the end of the struct.
* Otherwise it is identical to the 32-bit version.
*/
static inline int get_v4l2_input32(struct v4l2_input *p64,
struct v4l2_input32 __user *p32)
{
if (copy_from_user(p64, p32, sizeof(*p32)))
return -EFAULT;
return 0;
}
static inline int put_v4l2_input32(struct v4l2_input *p64,
struct v4l2_input32 __user *p32)
{
if (copy_to_user(p32, p64, sizeof(*p32)))
return -EFAULT;
return 0;
}
struct v4l2_ext_controls32 {
__u32 which;
__u32 count;
__u32 error_idx;
__s32 request_fd;
__u32 reserved[1];
compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
};
struct v4l2_ext_control32 {
__u32 id;
__u32 size;
__u32 reserved2[1];
union {
__s32 value;
__s64 value64;
compat_caddr_t string; /* actually char * */
};
} __attribute__ ((packed));
/* Return true if this control is a pointer type. */
static inline bool ctrl_is_pointer(struct file *file, u32 id)
{
struct video_device *vdev = video_devdata(file);
struct v4l2_fh *fh = NULL;
struct v4l2_ctrl_handler *hdl = NULL;
struct v4l2_query_ext_ctrl qec = { id };
const struct v4l2_ioctl_ops *ops = vdev->ioctl_ops;
if (test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags))
fh = file->private_data;
if (fh && fh->ctrl_handler)
hdl = fh->ctrl_handler;
else if (vdev->ctrl_handler)
hdl = vdev->ctrl_handler;
if (hdl) {
struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, id);
return ctrl && ctrl->is_ptr;
}
if (!ops || !ops->vidioc_query_ext_ctrl)
return false;
return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&
(qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD);
}
static int get_v4l2_ext_controls32(struct v4l2_ext_controls *p64,
struct v4l2_ext_controls32 __user *p32)
{
struct v4l2_ext_controls32 ec32;
if (copy_from_user(&ec32, p32, sizeof(ec32)))
return -EFAULT;
*p64 = (struct v4l2_ext_controls) {
.which = ec32.which,
.count = ec32.count,
.error_idx = ec32.error_idx,
.request_fd = ec32.request_fd,
.reserved[0] = ec32.reserved[0],
.controls = (void __force *)compat_ptr(ec32.controls),
};
return 0;
}
static int put_v4l2_ext_controls32(struct v4l2_ext_controls *p64,
struct v4l2_ext_controls32 __user *p32)
{
struct v4l2_ext_controls32 ec32;
memset(&ec32, 0, sizeof(ec32));
ec32 = (struct v4l2_ext_controls32) {
.which = p64->which,
.count = p64->count,
.error_idx = p64->error_idx,
.request_fd = p64->request_fd,
.reserved[0] = p64->reserved[0],
.controls = (uintptr_t)p64->controls,
};
if (copy_to_user(p32, &ec32, sizeof(ec32)))
return -EFAULT;
return 0;
}
#ifdef CONFIG_X86_64
/*
* x86 is the only compat architecture with different struct alignment
* between 32-bit and 64-bit tasks.
*/
struct v4l2_event32 {
__u32 type;
union {
compat_s64 value64;
__u8 data[64];
} u;
__u32 pending;
__u32 sequence;
struct {
compat_s64 tv_sec;
compat_s64 tv_nsec;
} timestamp;
__u32 id;
__u32 reserved[8];
};
static int put_v4l2_event32(struct v4l2_event *p64,
struct v4l2_event32 __user *p32)
{
if (put_user(p64->type, &p32->type) ||
copy_to_user(&p32->u, &p64->u, sizeof(p64->u)) ||
put_user(p64->pending, &p32->pending) ||
put_user(p64->sequence, &p32->sequence) ||
put_user(p64->timestamp.tv_sec, &p32->timestamp.tv_sec) ||
put_user(p64->timestamp.tv_nsec, &p32->timestamp.tv_nsec) ||
put_user(p64->id, &p32->id) ||
copy_to_user(p32->reserved, p64->reserved, sizeof(p32->reserved)))
return -EFAULT;
return 0;
}
#endif
#ifdef CONFIG_COMPAT_32BIT_TIME
struct v4l2_event32_time32 {
__u32 type;
union {
compat_s64 value64;
__u8 data[64];
} u;
__u32 pending;
__u32 sequence;
struct old_timespec32 timestamp;
__u32 id;
__u32 reserved[8];
};
static int put_v4l2_event32_time32(struct v4l2_event *p64,
struct v4l2_event32_time32 __user *p32)
{
if (put_user(p64->type, &p32->type) ||
copy_to_user(&p32->u, &p64->u, sizeof(p64->u)) ||
put_user(p64->pending, &p32->pending) ||
put_user(p64->sequence, &p32->sequence) ||
put_user(p64->timestamp.tv_sec, &p32->timestamp.tv_sec) ||
put_user(p64->timestamp.tv_nsec, &p32->timestamp.tv_nsec) ||
put_user(p64->id, &p32->id) ||
copy_to_user(p32->reserved, p64->reserved, sizeof(p32->reserved)))
return -EFAULT;
return 0;
}
#endif
struct v4l2_edid32 {
__u32 pad;
__u32 start_block;
__u32 blocks;
__u32 reserved[5];
compat_caddr_t edid;
};
static int get_v4l2_edid32(struct v4l2_edid *p64,
struct v4l2_edid32 __user *p32)
{
compat_uptr_t edid;
if (copy_from_user(p64, p32, offsetof(struct v4l2_edid32, edid)) ||
get_user(edid, &p32->edid))
return -EFAULT;
p64->edid = (void __force *)compat_ptr(edid);
return 0;
}
static int put_v4l2_edid32(struct v4l2_edid *p64,
struct v4l2_edid32 __user *p32)
{
if (copy_to_user(p32, p64, offsetof(struct v4l2_edid32, edid)))
return -EFAULT;
return 0;
}
/*
* List of ioctls that require 32-bits/64-bits conversion
*
* The V4L2 ioctls that aren't listed there don't have pointer arguments
* and the struct size is identical for both 32 and 64 bits versions, so
* they don't need translations.
*/
#define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32)
#define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32)
#define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32)
#define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32)
#define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32)
#define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32)
#define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32)
#define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32)
#define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32)
#define VIDIOC_G_EDID32 _IOWR('V', 40, struct v4l2_edid32)
#define VIDIOC_S_EDID32 _IOWR('V', 41, struct v4l2_edid32)
#define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32)
#define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32)
#define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32)
#define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32)
#define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32)
#define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32)
#define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32)
#ifdef CONFIG_COMPAT_32BIT_TIME
#define VIDIOC_QUERYBUF32_TIME32 _IOWR('V', 9, struct v4l2_buffer32_time32)
#define VIDIOC_QBUF32_TIME32 _IOWR('V', 15, struct v4l2_buffer32_time32)
#define VIDIOC_DQBUF32_TIME32 _IOWR('V', 17, struct v4l2_buffer32_time32)
#define VIDIOC_DQEVENT32_TIME32 _IOR ('V', 89, struct v4l2_event32_time32)
#define VIDIOC_PREPARE_BUF32_TIME32 _IOWR('V', 93, struct v4l2_buffer32_time32)
#endif
unsigned int v4l2_compat_translate_cmd(unsigned int cmd)
{
switch (cmd) {
case VIDIOC_G_FMT32:
return VIDIOC_G_FMT;
case VIDIOC_S_FMT32:
return VIDIOC_S_FMT;
case VIDIOC_TRY_FMT32:
return VIDIOC_TRY_FMT;
case VIDIOC_G_FBUF32:
return VIDIOC_G_FBUF;
case VIDIOC_S_FBUF32:
return VIDIOC_S_FBUF;
#ifdef CONFIG_COMPAT_32BIT_TIME
case VIDIOC_QUERYBUF32_TIME32:
return VIDIOC_QUERYBUF;
case VIDIOC_QBUF32_TIME32:
return VIDIOC_QBUF;
case VIDIOC_DQBUF32_TIME32:
return VIDIOC_DQBUF;
case VIDIOC_PREPARE_BUF32_TIME32:
return VIDIOC_PREPARE_BUF;
#endif
case VIDIOC_QUERYBUF32:
return VIDIOC_QUERYBUF;
case VIDIOC_QBUF32:
return VIDIOC_QBUF;
case VIDIOC_DQBUF32:
return VIDIOC_DQBUF;
case VIDIOC_CREATE_BUFS32:
return VIDIOC_CREATE_BUFS;
case VIDIOC_G_EXT_CTRLS32:
return VIDIOC_G_EXT_CTRLS;
case VIDIOC_S_EXT_CTRLS32:
return VIDIOC_S_EXT_CTRLS;
case VIDIOC_TRY_EXT_CTRLS32:
return VIDIOC_TRY_EXT_CTRLS;
case VIDIOC_PREPARE_BUF32:
return VIDIOC_PREPARE_BUF;
case VIDIOC_ENUMSTD32:
return VIDIOC_ENUMSTD;
case VIDIOC_ENUMINPUT32:
return VIDIOC_ENUMINPUT;
case VIDIOC_G_EDID32:
return VIDIOC_G_EDID;
case VIDIOC_S_EDID32:
return VIDIOC_S_EDID;
#ifdef CONFIG_X86_64
case VIDIOC_DQEVENT32:
return VIDIOC_DQEVENT;
#endif
#ifdef CONFIG_COMPAT_32BIT_TIME
case VIDIOC_DQEVENT32_TIME32:
return VIDIOC_DQEVENT;
#endif
}
return cmd;
}
int v4l2_compat_get_user(void __user *arg, void *parg, unsigned int cmd)
{
switch (cmd) {
case VIDIOC_G_FMT32:
case VIDIOC_S_FMT32:
case VIDIOC_TRY_FMT32:
return get_v4l2_format32(parg, arg);
case VIDIOC_S_FBUF32:
return get_v4l2_framebuffer32(parg, arg);
#ifdef CONFIG_COMPAT_32BIT_TIME
case VIDIOC_QUERYBUF32_TIME32:
case VIDIOC_QBUF32_TIME32:
case VIDIOC_DQBUF32_TIME32:
case VIDIOC_PREPARE_BUF32_TIME32:
return get_v4l2_buffer32_time32(parg, arg);
#endif
case VIDIOC_QUERYBUF32:
case VIDIOC_QBUF32:
case VIDIOC_DQBUF32:
case VIDIOC_PREPARE_BUF32:
return get_v4l2_buffer32(parg, arg);
case VIDIOC_G_EXT_CTRLS32:
case VIDIOC_S_EXT_CTRLS32:
case VIDIOC_TRY_EXT_CTRLS32:
return get_v4l2_ext_controls32(parg, arg);
case VIDIOC_CREATE_BUFS32:
return get_v4l2_create32(parg, arg);
case VIDIOC_ENUMSTD32:
return get_v4l2_standard32(parg, arg);
case VIDIOC_ENUMINPUT32:
return get_v4l2_input32(parg, arg);
case VIDIOC_G_EDID32:
case VIDIOC_S_EDID32:
return get_v4l2_edid32(parg, arg);
}
return 0;
}
int v4l2_compat_put_user(void __user *arg, void *parg, unsigned int cmd)
{
switch (cmd) {
case VIDIOC_G_FMT32:
case VIDIOC_S_FMT32:
case VIDIOC_TRY_FMT32:
return put_v4l2_format32(parg, arg);
case VIDIOC_G_FBUF32:
return put_v4l2_framebuffer32(parg, arg);
#ifdef CONFIG_COMPAT_32BIT_TIME
case VIDIOC_QUERYBUF32_TIME32:
case VIDIOC_QBUF32_TIME32:
case VIDIOC_DQBUF32_TIME32:
case VIDIOC_PREPARE_BUF32_TIME32:
return put_v4l2_buffer32_time32(parg, arg);
#endif
case VIDIOC_QUERYBUF32:
case VIDIOC_QBUF32:
case VIDIOC_DQBUF32:
case VIDIOC_PREPARE_BUF32:
return put_v4l2_buffer32(parg, arg);
case VIDIOC_G_EXT_CTRLS32:
case VIDIOC_S_EXT_CTRLS32:
case VIDIOC_TRY_EXT_CTRLS32:
return put_v4l2_ext_controls32(parg, arg);
case VIDIOC_CREATE_BUFS32:
return put_v4l2_create32(parg, arg);
case VIDIOC_ENUMSTD32:
return put_v4l2_standard32(parg, arg);
case VIDIOC_ENUMINPUT32:
return put_v4l2_input32(parg, arg);
case VIDIOC_G_EDID32:
case VIDIOC_S_EDID32:
return put_v4l2_edid32(parg, arg);
#ifdef CONFIG_X86_64
case VIDIOC_DQEVENT32:
return put_v4l2_event32(parg, arg);
#endif
#ifdef CONFIG_COMPAT_32BIT_TIME
case VIDIOC_DQEVENT32_TIME32:
return put_v4l2_event32_time32(parg, arg);
#endif
}
return 0;
}
int v4l2_compat_get_array_args(struct file *file, void *mbuf,
void __user *user_ptr, size_t array_size,
unsigned int cmd, void *arg)
{
int err = 0;
memset(mbuf, 0, array_size);
switch (cmd) {
#ifdef CONFIG_COMPAT_32BIT_TIME
case VIDIOC_QUERYBUF32_TIME32:
case VIDIOC_QBUF32_TIME32:
case VIDIOC_DQBUF32_TIME32:
case VIDIOC_PREPARE_BUF32_TIME32:
#endif
case VIDIOC_QUERYBUF32:
case VIDIOC_QBUF32:
case VIDIOC_DQBUF32:
case VIDIOC_PREPARE_BUF32: {
struct v4l2_buffer *b64 = arg;
struct v4l2_plane *p64 = mbuf;
struct v4l2_plane32 __user *p32 = user_ptr;
if (V4L2_TYPE_IS_MULTIPLANAR(b64->type)) {
u32 num_planes = b64->length;
if (num_planes == 0)
return 0;
while (num_planes--) {
err = get_v4l2_plane32(p64, p32, b64->memory);
if (err)
return err;
++p64;
++p32;
}
}
break;
}
case VIDIOC_G_EXT_CTRLS32:
case VIDIOC_S_EXT_CTRLS32:
case VIDIOC_TRY_EXT_CTRLS32: {
struct v4l2_ext_controls *ecs64 = arg;
struct v4l2_ext_control *ec64 = mbuf;
struct v4l2_ext_control32 __user *ec32 = user_ptr;
int n;
for (n = 0; n < ecs64->count; n++) {
if (copy_from_user(ec64, ec32, sizeof(*ec32)))
return -EFAULT;
if (ctrl_is_pointer(file, ec64->id)) {
compat_uptr_t p;
if (get_user(p, &ec32->string))
return -EFAULT;
ec64->string = compat_ptr(p);
}
ec32++;
ec64++;
}
break;
}
default:
if (copy_from_user(mbuf, user_ptr, array_size))
err = -EFAULT;
break;
}
return err;
}
int v4l2_compat_put_array_args(struct file *file, void __user *user_ptr,
void *mbuf, size_t array_size,
unsigned int cmd, void *arg)
{
int err = 0;
switch (cmd) {
#ifdef CONFIG_COMPAT_32BIT_TIME
case VIDIOC_QUERYBUF32_TIME32:
case VIDIOC_QBUF32_TIME32:
case VIDIOC_DQBUF32_TIME32:
case VIDIOC_PREPARE_BUF32_TIME32:
#endif
case VIDIOC_QUERYBUF32:
case VIDIOC_QBUF32:
case VIDIOC_DQBUF32:
case VIDIOC_PREPARE_BUF32: {
struct v4l2_buffer *b64 = arg;
struct v4l2_plane *p64 = mbuf;
struct v4l2_plane32 __user *p32 = user_ptr;
if (V4L2_TYPE_IS_MULTIPLANAR(b64->type)) {
u32 num_planes = b64->length;
if (num_planes == 0)
return 0;
while (num_planes--) {
err = put_v4l2_plane32(p64, p32, b64->memory);
if (err)
return err;
++p64;
++p32;
}
}
break;
}
case VIDIOC_G_EXT_CTRLS32:
case VIDIOC_S_EXT_CTRLS32:
case VIDIOC_TRY_EXT_CTRLS32: {
struct v4l2_ext_controls *ecs64 = arg;
struct v4l2_ext_control *ec64 = mbuf;
struct v4l2_ext_control32 __user *ec32 = user_ptr;
int n;
for (n = 0; n < ecs64->count; n++) {
unsigned int size = sizeof(*ec32);
/*
* Do not modify the pointer when copying a pointer
* control. The contents of the pointer was changed,
* not the pointer itself.
* The structures are otherwise compatible.
*/
if (ctrl_is_pointer(file, ec64->id))
size -= sizeof(ec32->value64);
if (copy_to_user(ec32, ec64, size))
return -EFAULT;
ec32++;
ec64++;
}
break;
}
default:
if (copy_to_user(user_ptr, mbuf, array_size))
err = -EFAULT;
break;
}
return err;
}
/**
* v4l2_compat_ioctl32() - Handles a compat32 ioctl call
*
* @file: pointer to &struct file with the file handler
* @cmd: ioctl to be called
* @arg: arguments passed from/to the ioctl handler
*
* This function is meant to be used as .compat_ioctl fops at v4l2-dev.c
* in order to deal with 32-bit calls on a 64-bits Kernel.
*
* This function calls do_video_ioctl() for non-private V4L2 ioctls.
* If the function is a private one it calls vdev->fops->compat_ioctl32
* instead.
*/
long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
{
struct video_device *vdev = video_devdata(file);
long ret = -ENOIOCTLCMD;
if (!file->f_op->unlocked_ioctl)
return ret;
if (!video_is_registered(vdev))
return -ENODEV;
if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
ret = file->f_op->unlocked_ioctl(file, cmd,
(unsigned long)compat_ptr(arg));
else if (vdev->fops->compat_ioctl32)
ret = vdev->fops->compat_ioctl32(file, cmd, arg);
if (ret == -ENOIOCTLCMD)
pr_debug("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
_IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
return ret;
}
EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);
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