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d055a76c00
Use one of the struct v4l2_create_buffers reserved bytes to report the maximum possible number of buffers for the queue. V4l2 framework set V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS flags in queue capabilities so userland can know when the field is valid. Does the same change in v4l2_create_buffers32 structure. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
1211 lines
31 KiB
C
1211 lines
31 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ioctl32.c: Conversion between 32bit and 64bit native ioctls.
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* Separated from fs stuff by Arnd Bergmann <arnd@arndb.de>
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*
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* Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com)
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* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
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* Copyright (C) 2001,2002 Andi Kleen, SuSE Labs
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* Copyright (C) 2003 Pavel Machek (pavel@ucw.cz)
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* Copyright (C) 2005 Philippe De Muyter (phdm@macqel.be)
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* Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
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*
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* These routines maintain argument size conversion between 32bit and 64bit
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* ioctls.
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*/
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#include <linux/compat.h>
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#include <linux/module.h>
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#include <linux/videodev2.h>
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#include <linux/v4l2-subdev.h>
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#include <media/v4l2-dev.h>
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#include <media/v4l2-fh.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-ioctl.h>
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/*
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* Per-ioctl data copy handlers.
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*
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* Those come in pairs, with a get_v4l2_foo() and a put_v4l2_foo() routine,
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* where "v4l2_foo" is the name of the V4L2 struct.
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*
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* They basically get two __user pointers, one with a 32-bits struct that
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* came from the userspace call and a 64-bits struct, also allocated as
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* userspace, but filled internally by do_video_ioctl().
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*
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* For ioctls that have pointers inside it, the functions will also
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* receive an ancillary buffer with extra space, used to pass extra
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* data to the routine.
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*/
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struct v4l2_window32 {
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struct v4l2_rect w;
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__u32 field; /* enum v4l2_field */
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__u32 chromakey;
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compat_caddr_t clips; /* always NULL */
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__u32 clipcount; /* always 0 */
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compat_caddr_t bitmap; /* always NULL */
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__u8 global_alpha;
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};
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static int get_v4l2_window32(struct v4l2_window *p64,
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struct v4l2_window32 __user *p32)
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{
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struct v4l2_window32 w32;
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if (copy_from_user(&w32, p32, sizeof(w32)))
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return -EFAULT;
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*p64 = (struct v4l2_window) {
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.w = w32.w,
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.field = w32.field,
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.chromakey = w32.chromakey,
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.clips = NULL,
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.clipcount = 0,
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.bitmap = NULL,
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.global_alpha = w32.global_alpha,
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};
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return 0;
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}
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static int put_v4l2_window32(struct v4l2_window *p64,
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struct v4l2_window32 __user *p32)
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{
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struct v4l2_window32 w32;
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memset(&w32, 0, sizeof(w32));
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w32 = (struct v4l2_window32) {
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.w = p64->w,
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.field = p64->field,
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.chromakey = p64->chromakey,
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.clips = 0,
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.clipcount = 0,
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.bitmap = 0,
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.global_alpha = p64->global_alpha,
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};
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if (copy_to_user(p32, &w32, sizeof(w32)))
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return -EFAULT;
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return 0;
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}
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struct v4l2_format32 {
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__u32 type; /* enum v4l2_buf_type */
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union {
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struct v4l2_pix_format pix;
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struct v4l2_pix_format_mplane pix_mp;
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struct v4l2_window32 win;
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struct v4l2_vbi_format vbi;
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struct v4l2_sliced_vbi_format sliced;
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struct v4l2_sdr_format sdr;
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struct v4l2_meta_format meta;
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__u8 raw_data[200]; /* user-defined */
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} fmt;
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};
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/**
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* struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
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* @index: on return, index of the first created buffer
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* @count: entry: number of requested buffers,
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* return: number of created buffers
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* @memory: buffer memory type
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* @format: frame format, for which buffers are requested
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* @capabilities: capabilities of this buffer type.
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* @flags: additional buffer management attributes (ignored unless the
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* queue has V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS capability and
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* configured for MMAP streaming I/O).
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* @max_num_buffers: if V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS capability flag is set
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* this field indicate the maximum possible number of buffers
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* for this queue.
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* @reserved: future extensions
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*/
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struct v4l2_create_buffers32 {
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__u32 index;
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__u32 count;
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__u32 memory; /* enum v4l2_memory */
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struct v4l2_format32 format;
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__u32 capabilities;
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__u32 flags;
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__u32 max_num_buffers;
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__u32 reserved[5];
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};
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static int get_v4l2_format32(struct v4l2_format *p64,
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struct v4l2_format32 __user *p32)
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{
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if (get_user(p64->type, &p32->type))
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return -EFAULT;
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switch (p64->type) {
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case V4L2_BUF_TYPE_VIDEO_CAPTURE:
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case V4L2_BUF_TYPE_VIDEO_OUTPUT:
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return copy_from_user(&p64->fmt.pix, &p32->fmt.pix,
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sizeof(p64->fmt.pix)) ? -EFAULT : 0;
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case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
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case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
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return copy_from_user(&p64->fmt.pix_mp, &p32->fmt.pix_mp,
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sizeof(p64->fmt.pix_mp)) ? -EFAULT : 0;
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case V4L2_BUF_TYPE_VIDEO_OVERLAY:
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case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
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return get_v4l2_window32(&p64->fmt.win, &p32->fmt.win);
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case V4L2_BUF_TYPE_VBI_CAPTURE:
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case V4L2_BUF_TYPE_VBI_OUTPUT:
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return copy_from_user(&p64->fmt.vbi, &p32->fmt.vbi,
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sizeof(p64->fmt.vbi)) ? -EFAULT : 0;
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case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
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case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
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return copy_from_user(&p64->fmt.sliced, &p32->fmt.sliced,
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sizeof(p64->fmt.sliced)) ? -EFAULT : 0;
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case V4L2_BUF_TYPE_SDR_CAPTURE:
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case V4L2_BUF_TYPE_SDR_OUTPUT:
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return copy_from_user(&p64->fmt.sdr, &p32->fmt.sdr,
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sizeof(p64->fmt.sdr)) ? -EFAULT : 0;
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case V4L2_BUF_TYPE_META_CAPTURE:
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case V4L2_BUF_TYPE_META_OUTPUT:
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return copy_from_user(&p64->fmt.meta, &p32->fmt.meta,
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sizeof(p64->fmt.meta)) ? -EFAULT : 0;
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default:
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return -EINVAL;
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}
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}
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static int get_v4l2_create32(struct v4l2_create_buffers *p64,
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struct v4l2_create_buffers32 __user *p32)
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{
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if (copy_from_user(p64, p32,
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offsetof(struct v4l2_create_buffers32, format)))
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return -EFAULT;
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if (copy_from_user(&p64->flags, &p32->flags, sizeof(p32->flags)))
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return -EFAULT;
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if (copy_from_user(&p64->max_num_buffers, &p32->max_num_buffers,
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sizeof(p32->max_num_buffers)))
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return -EFAULT;
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return get_v4l2_format32(&p64->format, &p32->format);
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}
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static int put_v4l2_format32(struct v4l2_format *p64,
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struct v4l2_format32 __user *p32)
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{
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switch (p64->type) {
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case V4L2_BUF_TYPE_VIDEO_CAPTURE:
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case V4L2_BUF_TYPE_VIDEO_OUTPUT:
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return copy_to_user(&p32->fmt.pix, &p64->fmt.pix,
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sizeof(p64->fmt.pix)) ? -EFAULT : 0;
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case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
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case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
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return copy_to_user(&p32->fmt.pix_mp, &p64->fmt.pix_mp,
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sizeof(p64->fmt.pix_mp)) ? -EFAULT : 0;
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case V4L2_BUF_TYPE_VIDEO_OVERLAY:
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case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
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return put_v4l2_window32(&p64->fmt.win, &p32->fmt.win);
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case V4L2_BUF_TYPE_VBI_CAPTURE:
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case V4L2_BUF_TYPE_VBI_OUTPUT:
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return copy_to_user(&p32->fmt.vbi, &p64->fmt.vbi,
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sizeof(p64->fmt.vbi)) ? -EFAULT : 0;
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case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
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case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
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return copy_to_user(&p32->fmt.sliced, &p64->fmt.sliced,
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sizeof(p64->fmt.sliced)) ? -EFAULT : 0;
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case V4L2_BUF_TYPE_SDR_CAPTURE:
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case V4L2_BUF_TYPE_SDR_OUTPUT:
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return copy_to_user(&p32->fmt.sdr, &p64->fmt.sdr,
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sizeof(p64->fmt.sdr)) ? -EFAULT : 0;
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case V4L2_BUF_TYPE_META_CAPTURE:
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case V4L2_BUF_TYPE_META_OUTPUT:
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return copy_to_user(&p32->fmt.meta, &p64->fmt.meta,
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sizeof(p64->fmt.meta)) ? -EFAULT : 0;
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default:
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return -EINVAL;
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}
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}
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static int put_v4l2_create32(struct v4l2_create_buffers *p64,
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struct v4l2_create_buffers32 __user *p32)
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{
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if (copy_to_user(p32, p64,
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offsetof(struct v4l2_create_buffers32, format)) ||
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put_user(p64->capabilities, &p32->capabilities) ||
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put_user(p64->flags, &p32->flags) ||
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put_user(p64->max_num_buffers, &p32->max_num_buffers) ||
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copy_to_user(p32->reserved, p64->reserved, sizeof(p64->reserved)))
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return -EFAULT;
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return put_v4l2_format32(&p64->format, &p32->format);
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}
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struct v4l2_standard32 {
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__u32 index;
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compat_u64 id;
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__u8 name[24];
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struct v4l2_fract frameperiod; /* Frames, not fields */
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__u32 framelines;
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__u32 reserved[4];
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};
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static int get_v4l2_standard32(struct v4l2_standard *p64,
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struct v4l2_standard32 __user *p32)
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{
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/* other fields are not set by the user, nor used by the driver */
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return get_user(p64->index, &p32->index);
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}
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static int put_v4l2_standard32(struct v4l2_standard *p64,
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struct v4l2_standard32 __user *p32)
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{
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if (put_user(p64->index, &p32->index) ||
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put_user(p64->id, &p32->id) ||
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copy_to_user(p32->name, p64->name, sizeof(p32->name)) ||
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copy_to_user(&p32->frameperiod, &p64->frameperiod,
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sizeof(p32->frameperiod)) ||
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put_user(p64->framelines, &p32->framelines) ||
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copy_to_user(p32->reserved, p64->reserved, sizeof(p32->reserved)))
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return -EFAULT;
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return 0;
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}
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struct v4l2_plane32 {
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__u32 bytesused;
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__u32 length;
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union {
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__u32 mem_offset;
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compat_long_t userptr;
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__s32 fd;
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} m;
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__u32 data_offset;
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__u32 reserved[11];
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};
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/*
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* This is correct for all architectures including i386, but not x32,
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* which has different alignment requirements for timestamp
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*/
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struct v4l2_buffer32 {
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__u32 index;
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__u32 type; /* enum v4l2_buf_type */
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__u32 bytesused;
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__u32 flags;
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__u32 field; /* enum v4l2_field */
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struct {
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compat_s64 tv_sec;
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compat_s64 tv_usec;
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} timestamp;
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struct v4l2_timecode timecode;
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__u32 sequence;
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/* memory location */
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__u32 memory; /* enum v4l2_memory */
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union {
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__u32 offset;
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compat_long_t userptr;
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compat_caddr_t planes;
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__s32 fd;
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} m;
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__u32 length;
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__u32 reserved2;
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__s32 request_fd;
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};
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#ifdef CONFIG_COMPAT_32BIT_TIME
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struct v4l2_buffer32_time32 {
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__u32 index;
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__u32 type; /* enum v4l2_buf_type */
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__u32 bytesused;
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__u32 flags;
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__u32 field; /* enum v4l2_field */
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struct old_timeval32 timestamp;
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struct v4l2_timecode timecode;
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__u32 sequence;
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/* memory location */
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__u32 memory; /* enum v4l2_memory */
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union {
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__u32 offset;
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compat_long_t userptr;
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compat_caddr_t planes;
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__s32 fd;
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} m;
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__u32 length;
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__u32 reserved2;
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__s32 request_fd;
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};
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#endif
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static int get_v4l2_plane32(struct v4l2_plane *p64,
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struct v4l2_plane32 __user *p32,
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enum v4l2_memory memory)
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{
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struct v4l2_plane32 plane32;
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typeof(p64->m) m = {};
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if (copy_from_user(&plane32, p32, sizeof(plane32)))
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return -EFAULT;
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switch (memory) {
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case V4L2_MEMORY_MMAP:
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case V4L2_MEMORY_OVERLAY:
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m.mem_offset = plane32.m.mem_offset;
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break;
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case V4L2_MEMORY_USERPTR:
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m.userptr = (unsigned long)compat_ptr(plane32.m.userptr);
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break;
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case V4L2_MEMORY_DMABUF:
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m.fd = plane32.m.fd;
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break;
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}
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memset(p64, 0, sizeof(*p64));
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*p64 = (struct v4l2_plane) {
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.bytesused = plane32.bytesused,
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.length = plane32.length,
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.m = m,
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.data_offset = plane32.data_offset,
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};
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return 0;
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}
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static int put_v4l2_plane32(struct v4l2_plane *p64,
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struct v4l2_plane32 __user *p32,
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enum v4l2_memory memory)
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{
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struct v4l2_plane32 plane32;
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memset(&plane32, 0, sizeof(plane32));
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plane32 = (struct v4l2_plane32) {
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.bytesused = p64->bytesused,
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.length = p64->length,
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.data_offset = p64->data_offset,
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};
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switch (memory) {
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case V4L2_MEMORY_MMAP:
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case V4L2_MEMORY_OVERLAY:
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plane32.m.mem_offset = p64->m.mem_offset;
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break;
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case V4L2_MEMORY_USERPTR:
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plane32.m.userptr = (uintptr_t)(p64->m.userptr);
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break;
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case V4L2_MEMORY_DMABUF:
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plane32.m.fd = p64->m.fd;
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break;
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}
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if (copy_to_user(p32, &plane32, sizeof(plane32)))
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return -EFAULT;
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return 0;
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}
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static int get_v4l2_buffer32(struct v4l2_buffer *vb,
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struct v4l2_buffer32 __user *arg)
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{
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struct v4l2_buffer32 vb32;
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if (copy_from_user(&vb32, arg, sizeof(vb32)))
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return -EFAULT;
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memset(vb, 0, sizeof(*vb));
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*vb = (struct v4l2_buffer) {
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.index = vb32.index,
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.type = vb32.type,
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.bytesused = vb32.bytesused,
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.flags = vb32.flags,
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.field = vb32.field,
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.timestamp.tv_sec = vb32.timestamp.tv_sec,
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.timestamp.tv_usec = vb32.timestamp.tv_usec,
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.timecode = vb32.timecode,
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.sequence = vb32.sequence,
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.memory = vb32.memory,
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.m.offset = vb32.m.offset,
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.length = vb32.length,
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.request_fd = vb32.request_fd,
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};
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switch (vb->memory) {
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case V4L2_MEMORY_MMAP:
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case V4L2_MEMORY_OVERLAY:
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vb->m.offset = vb32.m.offset;
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break;
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case V4L2_MEMORY_USERPTR:
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vb->m.userptr = (unsigned long)compat_ptr(vb32.m.userptr);
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break;
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case V4L2_MEMORY_DMABUF:
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vb->m.fd = vb32.m.fd;
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break;
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}
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if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
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vb->m.planes = (void __force *)
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compat_ptr(vb32.m.planes);
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return 0;
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}
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#ifdef CONFIG_COMPAT_32BIT_TIME
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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);
|