From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 1202 +++++++++++++++++++++++++ 1 file changed, 1202 insertions(+) create mode 100644 drivers/media/v4l2-core/v4l2-compat-ioctl32.c (limited to 'drivers/media/v4l2-core/v4l2-compat-ioctl32.c') diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c new file mode 100644 index 000000000..f3bed3785 --- /dev/null +++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c @@ -0,0 +1,1202 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ioctl32.c: Conversion between 32bit and 64bit native ioctls. + * Separated from fs stuff by Arnd Bergmann + * + * 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 + * + * These routines maintain argument size conversion between 32bit and 64bit + * ioctls. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * 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). + * @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 reserved[6]; +}; + +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; + 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) || + 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); -- cgit v1.2.3