| /* |
| * 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> |
| |
| /** |
| * assign_in_user() - Copy from one __user var to another one |
| * |
| * @to: __user var where data will be stored |
| * @from: __user var where data will be retrieved. |
| * |
| * As this code very often needs to allocate userspace memory, it is easier |
| * to have a macro that will do both get_user() and put_user() at once. |
| * |
| * This function complements the macros defined at asm-generic/uaccess.h. |
| * It uses the same argument order as copy_in_user() |
| */ |
| #define assign_in_user(to, from) \ |
| ({ \ |
| typeof(*from) __assign_tmp; \ |
| \ |
| get_user(__assign_tmp, from) || put_user(__assign_tmp, to); \ |
| }) |
| |
| /** |
| * get_user_cast() - Stores at a kernelspace local var the contents from a |
| * pointer with userspace data that is not tagged with __user. |
| * |
| * @__x: var where data will be stored |
| * @__ptr: var where data will be retrieved. |
| * |
| * Sometimes we need to declare a pointer without __user because it |
| * comes from a pointer struct field that will be retrieved from userspace |
| * by the 64-bit native ioctl handler. This function ensures that the |
| * @__ptr will be cast to __user before calling get_user() in order to |
| * avoid warnings with static code analyzers like smatch. |
| */ |
| #define get_user_cast(__x, __ptr) \ |
| ({ \ |
| get_user(__x, (typeof(*__ptr) __user *)(__ptr)); \ |
| }) |
| |
| /** |
| * put_user_force() - Stores the contents of a kernelspace local var |
| * into a userspace pointer, removing any __user cast. |
| * |
| * @__x: var where data will be stored |
| * @__ptr: var where data will be retrieved. |
| * |
| * Sometimes we need to remove the __user attribute from some data, |
| * by passing the __force macro. This function ensures that the |
| * @__ptr will be cast with __force before calling put_user(), in order to |
| * avoid warnings with static code analyzers like smatch. |
| */ |
| #define put_user_force(__x, __ptr) \ |
| ({ \ |
| put_user((typeof(*__x) __force *)(__x), __ptr); \ |
| }) |
| |
| /** |
| * assign_in_user_cast() - Copy from one __user var to another one |
| * |
| * @to: __user var where data will be stored |
| * @from: var where data will be retrieved that needs to be cast to __user. |
| * |
| * As this code very often needs to allocate userspace memory, it is easier |
| * to have a macro that will do both get_user_cast() and put_user() at once. |
| * |
| * This function should be used instead of assign_in_user() when the @from |
| * variable was not declared as __user. See get_user_cast() for more details. |
| * |
| * This function complements the macros defined at asm-generic/uaccess.h. |
| * It uses the same argument order as copy_in_user() |
| */ |
| #define assign_in_user_cast(to, from) \ |
| ({ \ |
| typeof(*from) __assign_tmp; \ |
| \ |
| get_user_cast(__assign_tmp, from) || put_user(__assign_tmp, to);\ |
| }) |
| |
| /** |
| * native_ioctl - Ancillary function that calls the native 64 bits ioctl |
| * handler. |
| * |
| * @file: pointer to &struct file with the file handler |
| * @cmd: ioctl to be called |
| * @arg: arguments passed from/to the ioctl handler |
| * |
| * This function calls the native ioctl handler at v4l2-dev, e. g. v4l2_ioctl() |
| */ |
| static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| long ret = -ENOIOCTLCMD; |
| |
| if (file->f_op->unlocked_ioctl) |
| ret = file->f_op->unlocked_ioctl(file, cmd, arg); |
| |
| return ret; |
| } |
| |
| |
| /* |
| * 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_clip32 { |
| struct v4l2_rect c; |
| compat_caddr_t next; |
| }; |
| |
| struct v4l2_window32 { |
| struct v4l2_rect w; |
| __u32 field; /* enum v4l2_field */ |
| __u32 chromakey; |
| compat_caddr_t clips; /* actually struct v4l2_clip32 * */ |
| __u32 clipcount; |
| compat_caddr_t bitmap; |
| __u8 global_alpha; |
| }; |
| |
| static int get_v4l2_window32(struct v4l2_window __user *p64, |
| struct v4l2_window32 __user *p32, |
| void __user *aux_buf, u32 aux_space) |
| { |
| struct v4l2_clip32 __user *uclips; |
| struct v4l2_clip __user *kclips; |
| compat_caddr_t p; |
| u32 clipcount; |
| |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| copy_in_user(&p64->w, &p32->w, sizeof(p32->w)) || |
| assign_in_user(&p64->field, &p32->field) || |
| assign_in_user(&p64->chromakey, &p32->chromakey) || |
| assign_in_user(&p64->global_alpha, &p32->global_alpha) || |
| get_user(clipcount, &p32->clipcount) || |
| put_user(clipcount, &p64->clipcount)) |
| return -EFAULT; |
| if (clipcount > 2048) |
| return -EINVAL; |
| if (!clipcount) |
| return put_user(NULL, &p64->clips); |
| |
| if (get_user(p, &p32->clips)) |
| return -EFAULT; |
| uclips = compat_ptr(p); |
| if (aux_space < clipcount * sizeof(*kclips)) |
| return -EFAULT; |
| kclips = aux_buf; |
| if (put_user(kclips, &p64->clips)) |
| return -EFAULT; |
| |
| while (clipcount--) { |
| if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c))) |
| return -EFAULT; |
| if (put_user(clipcount ? kclips + 1 : NULL, &kclips->next)) |
| return -EFAULT; |
| uclips++; |
| kclips++; |
| } |
| return 0; |
| } |
| |
| static int put_v4l2_window32(struct v4l2_window __user *p64, |
| struct v4l2_window32 __user *p32) |
| { |
| struct v4l2_clip __user *kclips; |
| struct v4l2_clip32 __user *uclips; |
| compat_caddr_t p; |
| u32 clipcount; |
| |
| if (copy_in_user(&p32->w, &p64->w, sizeof(p64->w)) || |
| assign_in_user(&p32->field, &p64->field) || |
| assign_in_user(&p32->chromakey, &p64->chromakey) || |
| assign_in_user(&p32->global_alpha, &p64->global_alpha) || |
| get_user(clipcount, &p64->clipcount) || |
| put_user(clipcount, &p32->clipcount)) |
| return -EFAULT; |
| if (!clipcount) |
| return 0; |
| |
| if (get_user(kclips, &p64->clips)) |
| return -EFAULT; |
| if (get_user(p, &p32->clips)) |
| return -EFAULT; |
| uclips = compat_ptr(p); |
| while (clipcount--) { |
| if (copy_in_user(&uclips->c, &kclips->c, sizeof(uclips->c))) |
| return -EFAULT; |
| uclips++; |
| kclips++; |
| } |
| 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. |
| * @reserved: future extensions |
| */ |
| struct v4l2_create_buffers32 { |
| __u32 index; |
| __u32 count; |
| __u32 memory; /* enum v4l2_memory */ |
| struct v4l2_format32 format; |
| __u32 capabilities; |
| __u32 reserved[7]; |
| }; |
| |
| static int __bufsize_v4l2_format(struct v4l2_format32 __user *p32, u32 *size) |
| { |
| u32 type; |
| |
| if (get_user(type, &p32->type)) |
| return -EFAULT; |
| |
| switch (type) { |
| case V4L2_BUF_TYPE_VIDEO_OVERLAY: |
| case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { |
| u32 clipcount; |
| |
| if (get_user(clipcount, &p32->fmt.win.clipcount)) |
| return -EFAULT; |
| if (clipcount > 2048) |
| return -EINVAL; |
| *size = clipcount * sizeof(struct v4l2_clip); |
| return 0; |
| } |
| default: |
| *size = 0; |
| return 0; |
| } |
| } |
| |
| static int bufsize_v4l2_format(struct v4l2_format32 __user *p32, u32 *size) |
| { |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32))) |
| return -EFAULT; |
| return __bufsize_v4l2_format(p32, size); |
| } |
| |
| static int __get_v4l2_format32(struct v4l2_format __user *p64, |
| struct v4l2_format32 __user *p32, |
| void __user *aux_buf, u32 aux_space) |
| { |
| u32 type; |
| |
| if (get_user(type, &p32->type) || put_user(type, &p64->type)) |
| return -EFAULT; |
| |
| switch (type) { |
| case V4L2_BUF_TYPE_VIDEO_CAPTURE: |
| case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
| return copy_in_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_in_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, |
| aux_buf, aux_space); |
| case V4L2_BUF_TYPE_VBI_CAPTURE: |
| case V4L2_BUF_TYPE_VBI_OUTPUT: |
| return copy_in_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_in_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_in_user(&p64->fmt.sdr, &p32->fmt.sdr, |
| sizeof(p64->fmt.sdr)) ? -EFAULT : 0; |
| case V4L2_BUF_TYPE_META_CAPTURE: |
| return copy_in_user(&p64->fmt.meta, &p32->fmt.meta, |
| sizeof(p64->fmt.meta)) ? -EFAULT : 0; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int get_v4l2_format32(struct v4l2_format __user *p64, |
| struct v4l2_format32 __user *p32, |
| void __user *aux_buf, u32 aux_space) |
| { |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32))) |
| return -EFAULT; |
| return __get_v4l2_format32(p64, p32, aux_buf, aux_space); |
| } |
| |
| static int bufsize_v4l2_create(struct v4l2_create_buffers32 __user *p32, |
| u32 *size) |
| { |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32))) |
| return -EFAULT; |
| return __bufsize_v4l2_format(&p32->format, size); |
| } |
| |
| static int get_v4l2_create32(struct v4l2_create_buffers __user *p64, |
| struct v4l2_create_buffers32 __user *p32, |
| void __user *aux_buf, u32 aux_space) |
| { |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| copy_in_user(p64, p32, |
| offsetof(struct v4l2_create_buffers32, format))) |
| return -EFAULT; |
| return __get_v4l2_format32(&p64->format, &p32->format, |
| aux_buf, aux_space); |
| } |
| |
| static int __put_v4l2_format32(struct v4l2_format __user *p64, |
| struct v4l2_format32 __user *p32) |
| { |
| u32 type; |
| |
| if (get_user(type, &p64->type)) |
| return -EFAULT; |
| |
| switch (type) { |
| case V4L2_BUF_TYPE_VIDEO_CAPTURE: |
| case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
| return copy_in_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_in_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_in_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_in_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_in_user(&p32->fmt.sdr, &p64->fmt.sdr, |
| sizeof(p64->fmt.sdr)) ? -EFAULT : 0; |
| case V4L2_BUF_TYPE_META_CAPTURE: |
| return copy_in_user(&p32->fmt.meta, &p64->fmt.meta, |
| sizeof(p64->fmt.meta)) ? -EFAULT : 0; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int put_v4l2_format32(struct v4l2_format __user *p64, |
| struct v4l2_format32 __user *p32) |
| { |
| if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32))) |
| return -EFAULT; |
| return __put_v4l2_format32(p64, p32); |
| } |
| |
| static int put_v4l2_create32(struct v4l2_create_buffers __user *p64, |
| struct v4l2_create_buffers32 __user *p32) |
| { |
| if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || |
| copy_in_user(p32, p64, |
| offsetof(struct v4l2_create_buffers32, format)) || |
| assign_in_user(&p32->capabilities, &p64->capabilities) || |
| copy_in_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 __user *p64, |
| struct v4l2_standard32 __user *p32) |
| { |
| /* other fields are not set by the user, nor used by the driver */ |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| assign_in_user(&p64->index, &p32->index)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int put_v4l2_standard32(struct v4l2_standard __user *p64, |
| struct v4l2_standard32 __user *p32) |
| { |
| if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || |
| assign_in_user(&p32->index, &p64->index) || |
| assign_in_user(&p32->id, &p64->id) || |
| copy_in_user(p32->name, p64->name, sizeof(p32->name)) || |
| copy_in_user(&p32->frameperiod, &p64->frameperiod, |
| sizeof(p32->frameperiod)) || |
| assign_in_user(&p32->framelines, &p64->framelines) || |
| copy_in_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]; |
| }; |
| |
| struct v4l2_buffer32 { |
| __u32 index; |
| __u32 type; /* enum v4l2_buf_type */ |
| __u32 bytesused; |
| __u32 flags; |
| __u32 field; /* enum v4l2_field */ |
| struct compat_timeval 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; |
| }; |
| |
| static int get_v4l2_plane32(struct v4l2_plane __user *p64, |
| struct v4l2_plane32 __user *p32, |
| enum v4l2_memory memory) |
| { |
| compat_ulong_t p; |
| |
| if (copy_in_user(p64, p32, 2 * sizeof(__u32)) || |
| copy_in_user(&p64->data_offset, &p32->data_offset, |
| sizeof(p64->data_offset))) |
| return -EFAULT; |
| |
| switch (memory) { |
| case V4L2_MEMORY_MMAP: |
| case V4L2_MEMORY_OVERLAY: |
| if (copy_in_user(&p64->m.mem_offset, &p32->m.mem_offset, |
| sizeof(p32->m.mem_offset))) |
| return -EFAULT; |
| break; |
| case V4L2_MEMORY_USERPTR: |
| if (get_user(p, &p32->m.userptr) || |
| put_user((unsigned long)compat_ptr(p), &p64->m.userptr)) |
| return -EFAULT; |
| break; |
| case V4L2_MEMORY_DMABUF: |
| if (copy_in_user(&p64->m.fd, &p32->m.fd, sizeof(p32->m.fd))) |
| return -EFAULT; |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int put_v4l2_plane32(struct v4l2_plane __user *p64, |
| struct v4l2_plane32 __user *p32, |
| enum v4l2_memory memory) |
| { |
| unsigned long p; |
| |
| if (copy_in_user(p32, p64, 2 * sizeof(__u32)) || |
| copy_in_user(&p32->data_offset, &p64->data_offset, |
| sizeof(p64->data_offset))) |
| return -EFAULT; |
| |
| switch (memory) { |
| case V4L2_MEMORY_MMAP: |
| case V4L2_MEMORY_OVERLAY: |
| if (copy_in_user(&p32->m.mem_offset, &p64->m.mem_offset, |
| sizeof(p64->m.mem_offset))) |
| return -EFAULT; |
| break; |
| case V4L2_MEMORY_USERPTR: |
| if (get_user(p, &p64->m.userptr) || |
| put_user((compat_ulong_t)ptr_to_compat((void __user *)p), |
| &p32->m.userptr)) |
| return -EFAULT; |
| break; |
| case V4L2_MEMORY_DMABUF: |
| if (copy_in_user(&p32->m.fd, &p64->m.fd, sizeof(p64->m.fd))) |
| return -EFAULT; |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int bufsize_v4l2_buffer(struct v4l2_buffer32 __user *p32, u32 *size) |
| { |
| u32 type; |
| u32 length; |
| |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| get_user(type, &p32->type) || |
| get_user(length, &p32->length)) |
| return -EFAULT; |
| |
| if (V4L2_TYPE_IS_MULTIPLANAR(type)) { |
| if (length > VIDEO_MAX_PLANES) |
| return -EINVAL; |
| |
| /* |
| * We don't really care if userspace decides to kill itself |
| * by passing a very big length value |
| */ |
| *size = length * sizeof(struct v4l2_plane); |
| } else { |
| *size = 0; |
| } |
| return 0; |
| } |
| |
| static int get_v4l2_buffer32(struct v4l2_buffer __user *p64, |
| struct v4l2_buffer32 __user *p32, |
| void __user *aux_buf, u32 aux_space) |
| { |
| u32 type; |
| u32 length; |
| s32 request_fd; |
| enum v4l2_memory memory; |
| struct v4l2_plane32 __user *uplane32; |
| struct v4l2_plane __user *uplane; |
| compat_caddr_t p; |
| int ret; |
| |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| assign_in_user(&p64->index, &p32->index) || |
| get_user(type, &p32->type) || |
| put_user(type, &p64->type) || |
| assign_in_user(&p64->flags, &p32->flags) || |
| get_user(memory, &p32->memory) || |
| put_user(memory, &p64->memory) || |
| get_user(length, &p32->length) || |
| put_user(length, &p64->length) || |
| get_user(request_fd, &p32->request_fd) || |
| put_user(request_fd, &p64->request_fd)) |
| return -EFAULT; |
| |
| if (V4L2_TYPE_IS_OUTPUT(type)) |
| if (assign_in_user(&p64->bytesused, &p32->bytesused) || |
| assign_in_user(&p64->field, &p32->field) || |
| assign_in_user(&p64->timestamp.tv_sec, |
| &p32->timestamp.tv_sec) || |
| assign_in_user(&p64->timestamp.tv_usec, |
| &p32->timestamp.tv_usec)) |
| return -EFAULT; |
| |
| if (V4L2_TYPE_IS_MULTIPLANAR(type)) { |
| u32 num_planes = length; |
| |
| if (num_planes == 0) { |
| /* |
| * num_planes == 0 is legal, e.g. when userspace doesn't |
| * need planes array on DQBUF |
| */ |
| return put_user(NULL, &p64->m.planes); |
| } |
| if (num_planes > VIDEO_MAX_PLANES) |
| return -EINVAL; |
| |
| if (get_user(p, &p32->m.planes)) |
| return -EFAULT; |
| |
| uplane32 = compat_ptr(p); |
| if (!access_ok(VERIFY_READ, uplane32, |
| num_planes * sizeof(*uplane32))) |
| return -EFAULT; |
| |
| /* |
| * We don't really care if userspace decides to kill itself |
| * by passing a very big num_planes value |
| */ |
| if (aux_space < num_planes * sizeof(*uplane)) |
| return -EFAULT; |
| |
| uplane = aux_buf; |
| if (put_user_force(uplane, &p64->m.planes)) |
| return -EFAULT; |
| |
| while (num_planes--) { |
| ret = get_v4l2_plane32(uplane, uplane32, memory); |
| if (ret) |
| return ret; |
| uplane++; |
| uplane32++; |
| } |
| } else { |
| switch (memory) { |
| case V4L2_MEMORY_MMAP: |
| case V4L2_MEMORY_OVERLAY: |
| if (assign_in_user(&p64->m.offset, &p32->m.offset)) |
| return -EFAULT; |
| break; |
| case V4L2_MEMORY_USERPTR: { |
| compat_ulong_t userptr; |
| |
| if (get_user(userptr, &p32->m.userptr) || |
| put_user((unsigned long)compat_ptr(userptr), |
| &p64->m.userptr)) |
| return -EFAULT; |
| break; |
| } |
| case V4L2_MEMORY_DMABUF: |
| if (assign_in_user(&p64->m.fd, &p32->m.fd)) |
| return -EFAULT; |
| break; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int put_v4l2_buffer32(struct v4l2_buffer __user *p64, |
| struct v4l2_buffer32 __user *p32) |
| { |
| u32 type; |
| u32 length; |
| enum v4l2_memory memory; |
| struct v4l2_plane32 __user *uplane32; |
| struct v4l2_plane *uplane; |
| compat_caddr_t p; |
| int ret; |
| |
| if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || |
| assign_in_user(&p32->index, &p64->index) || |
| get_user(type, &p64->type) || |
| put_user(type, &p32->type) || |
| assign_in_user(&p32->flags, &p64->flags) || |
| get_user(memory, &p64->memory) || |
| put_user(memory, &p32->memory)) |
| return -EFAULT; |
| |
| if (assign_in_user(&p32->bytesused, &p64->bytesused) || |
| assign_in_user(&p32->field, &p64->field) || |
| assign_in_user(&p32->timestamp.tv_sec, &p64->timestamp.tv_sec) || |
| assign_in_user(&p32->timestamp.tv_usec, &p64->timestamp.tv_usec) || |
| copy_in_user(&p32->timecode, &p64->timecode, sizeof(p64->timecode)) || |
| assign_in_user(&p32->sequence, &p64->sequence) || |
| assign_in_user(&p32->reserved2, &p64->reserved2) || |
| assign_in_user(&p32->request_fd, &p64->request_fd) || |
| get_user(length, &p64->length) || |
| put_user(length, &p32->length)) |
| return -EFAULT; |
| |
| if (V4L2_TYPE_IS_MULTIPLANAR(type)) { |
| u32 num_planes = length; |
| |
| if (num_planes == 0) |
| return 0; |
| /* We need to define uplane without __user, even though |
| * it does point to data in userspace here. The reason is |
| * that v4l2-ioctl.c copies it from userspace to kernelspace, |
| * so its definition in videodev2.h doesn't have a |
| * __user markup. Defining uplane with __user causes |
| * smatch warnings, so instead declare it without __user |
| * and cast it as a userspace pointer to put_v4l2_plane32(). |
| */ |
| if (get_user(uplane, &p64->m.planes)) |
| return -EFAULT; |
| if (get_user(p, &p32->m.planes)) |
| return -EFAULT; |
| uplane32 = compat_ptr(p); |
| |
| while (num_planes--) { |
| ret = put_v4l2_plane32((void __user *)uplane, |
| uplane32, memory); |
| if (ret) |
| return ret; |
| ++uplane; |
| ++uplane32; |
| } |
| } else { |
| switch (memory) { |
| case V4L2_MEMORY_MMAP: |
| case V4L2_MEMORY_OVERLAY: |
| if (assign_in_user(&p32->m.offset, &p64->m.offset)) |
| return -EFAULT; |
| break; |
| case V4L2_MEMORY_USERPTR: |
| if (assign_in_user(&p32->m.userptr, &p64->m.userptr)) |
| return -EFAULT; |
| break; |
| case V4L2_MEMORY_DMABUF: |
| if (assign_in_user(&p32->m.fd, &p64->m.fd)) |
| return -EFAULT; |
| break; |
| } |
| } |
| |
| return 0; |
| } |
| |
| 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 __user *p64, |
| struct v4l2_framebuffer32 __user *p32) |
| { |
| compat_caddr_t tmp; |
| |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| get_user(tmp, &p32->base) || |
| put_user_force(compat_ptr(tmp), &p64->base) || |
| assign_in_user(&p64->capability, &p32->capability) || |
| assign_in_user(&p64->flags, &p32->flags) || |
| copy_in_user(&p64->fmt, &p32->fmt, sizeof(p64->fmt))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int put_v4l2_framebuffer32(struct v4l2_framebuffer __user *p64, |
| struct v4l2_framebuffer32 __user *p32) |
| { |
| void *base; |
| |
| if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || |
| get_user(base, &p64->base) || |
| put_user(ptr_to_compat((void __user *)base), &p32->base) || |
| assign_in_user(&p32->capability, &p64->capability) || |
| assign_in_user(&p32->flags, &p64->flags) || |
| copy_in_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 __user *p64, |
| struct v4l2_input32 __user *p32) |
| { |
| if (copy_in_user(p64, p32, sizeof(*p32))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static inline int put_v4l2_input32(struct v4l2_input __user *p64, |
| struct v4l2_input32 __user *p32) |
| { |
| if (copy_in_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 bufsize_v4l2_ext_controls(struct v4l2_ext_controls32 __user *p32, |
| u32 *size) |
| { |
| u32 count; |
| |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| get_user(count, &p32->count)) |
| return -EFAULT; |
| if (count > V4L2_CID_MAX_CTRLS) |
| return -EINVAL; |
| *size = count * sizeof(struct v4l2_ext_control); |
| return 0; |
| } |
| |
| static int get_v4l2_ext_controls32(struct file *file, |
| struct v4l2_ext_controls __user *p64, |
| struct v4l2_ext_controls32 __user *p32, |
| void __user *aux_buf, u32 aux_space) |
| { |
| struct v4l2_ext_control32 __user *ucontrols; |
| struct v4l2_ext_control __user *kcontrols; |
| u32 count; |
| u32 n; |
| compat_caddr_t p; |
| |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| assign_in_user(&p64->which, &p32->which) || |
| get_user(count, &p32->count) || |
| put_user(count, &p64->count) || |
| assign_in_user(&p64->error_idx, &p32->error_idx) || |
| assign_in_user(&p64->request_fd, &p32->request_fd) || |
| copy_in_user(p64->reserved, p32->reserved, sizeof(p64->reserved))) |
| return -EFAULT; |
| |
| if (count == 0) |
| return put_user(NULL, &p64->controls); |
| if (count > V4L2_CID_MAX_CTRLS) |
| return -EINVAL; |
| if (get_user(p, &p32->controls)) |
| return -EFAULT; |
| ucontrols = compat_ptr(p); |
| if (!access_ok(VERIFY_READ, ucontrols, count * sizeof(*ucontrols))) |
| return -EFAULT; |
| if (aux_space < count * sizeof(*kcontrols)) |
| return -EFAULT; |
| kcontrols = aux_buf; |
| if (put_user_force(kcontrols, &p64->controls)) |
| return -EFAULT; |
| |
| for (n = 0; n < count; n++) { |
| u32 id; |
| |
| if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols))) |
| return -EFAULT; |
| |
| if (get_user(id, &kcontrols->id)) |
| return -EFAULT; |
| |
| if (ctrl_is_pointer(file, id)) { |
| void __user *s; |
| |
| if (get_user(p, &ucontrols->string)) |
| return -EFAULT; |
| s = compat_ptr(p); |
| if (put_user(s, &kcontrols->string)) |
| return -EFAULT; |
| } |
| ucontrols++; |
| kcontrols++; |
| } |
| return 0; |
| } |
| |
| static int put_v4l2_ext_controls32(struct file *file, |
| struct v4l2_ext_controls __user *p64, |
| struct v4l2_ext_controls32 __user *p32) |
| { |
| struct v4l2_ext_control32 __user *ucontrols; |
| struct v4l2_ext_control *kcontrols; |
| u32 count; |
| u32 n; |
| compat_caddr_t p; |
| |
| /* |
| * We need to define kcontrols without __user, even though it does |
| * point to data in userspace here. The reason is that v4l2-ioctl.c |
| * copies it from userspace to kernelspace, so its definition in |
| * videodev2.h doesn't have a __user markup. Defining kcontrols |
| * with __user causes smatch warnings, so instead declare it |
| * without __user and cast it as a userspace pointer where needed. |
| */ |
| if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || |
| assign_in_user(&p32->which, &p64->which) || |
| get_user(count, &p64->count) || |
| put_user(count, &p32->count) || |
| assign_in_user(&p32->error_idx, &p64->error_idx) || |
| assign_in_user(&p32->request_fd, &p64->request_fd) || |
| copy_in_user(p32->reserved, p64->reserved, sizeof(p32->reserved)) || |
| get_user(kcontrols, &p64->controls)) |
| return -EFAULT; |
| |
| if (!count || count > (U32_MAX/sizeof(*ucontrols))) |
| return 0; |
| if (get_user(p, &p32->controls)) |
| return -EFAULT; |
| ucontrols = compat_ptr(p); |
| if (!access_ok(VERIFY_WRITE, ucontrols, count * sizeof(*ucontrols))) |
| return -EFAULT; |
| |
| for (n = 0; n < count; n++) { |
| unsigned int size = sizeof(*ucontrols); |
| u32 id; |
| |
| if (get_user_cast(id, &kcontrols->id) || |
| put_user(id, &ucontrols->id) || |
| assign_in_user_cast(&ucontrols->size, &kcontrols->size) || |
| copy_in_user(&ucontrols->reserved2, |
| (void __user *)&kcontrols->reserved2, |
| sizeof(ucontrols->reserved2))) |
| return -EFAULT; |
| |
| /* |
| * Do not modify the pointer when copying a pointer control. |
| * The contents of the pointer was changed, not the pointer |
| * itself. |
| */ |
| if (ctrl_is_pointer(file, id)) |
| size -= sizeof(ucontrols->value64); |
| |
| if (copy_in_user(ucontrols, |
| (void __user *)kcontrols, size)) |
| return -EFAULT; |
| |
| ucontrols++; |
| kcontrols++; |
| } |
| return 0; |
| } |
| |
| struct v4l2_event32 { |
| __u32 type; |
| union { |
| compat_s64 value64; |
| __u8 data[64]; |
| } u; |
| __u32 pending; |
| __u32 sequence; |
| struct compat_timespec timestamp; |
| __u32 id; |
| __u32 reserved[8]; |
| }; |
| |
| static int put_v4l2_event32(struct v4l2_event __user *p64, |
| struct v4l2_event32 __user *p32) |
| { |
| if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || |
| assign_in_user(&p32->type, &p64->type) || |
| copy_in_user(&p32->u, &p64->u, sizeof(p64->u)) || |
| assign_in_user(&p32->pending, &p64->pending) || |
| assign_in_user(&p32->sequence, &p64->sequence) || |
| assign_in_user(&p32->timestamp.tv_sec, &p64->timestamp.tv_sec) || |
| assign_in_user(&p32->timestamp.tv_nsec, &p64->timestamp.tv_nsec) || |
| assign_in_user(&p32->id, &p64->id) || |
| copy_in_user(p32->reserved, p64->reserved, sizeof(p32->reserved))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| 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 __user *p64, |
| struct v4l2_edid32 __user *p32) |
| { |
| compat_uptr_t tmp; |
| |
| if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || |
| assign_in_user(&p64->pad, &p32->pad) || |
| assign_in_user(&p64->start_block, &p32->start_block) || |
| assign_in_user_cast(&p64->blocks, &p32->blocks) || |
| get_user(tmp, &p32->edid) || |
| put_user_force(compat_ptr(tmp), &p64->edid) || |
| copy_in_user(p64->reserved, p32->reserved, sizeof(p64->reserved))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int put_v4l2_edid32(struct v4l2_edid __user *p64, |
| struct v4l2_edid32 __user *p32) |
| { |
| void *edid; |
| |
| if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || |
| assign_in_user(&p32->pad, &p64->pad) || |
| assign_in_user(&p32->start_block, &p64->start_block) || |
| assign_in_user(&p32->blocks, &p64->blocks) || |
| get_user(edid, &p64->edid) || |
| put_user(ptr_to_compat((void __user *)edid), &p32->edid) || |
| copy_in_user(p32->reserved, p64->reserved, sizeof(p32->reserved))) |
| 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) |
| |
| #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32) |
| #define VIDIOC_STREAMON32 _IOW ('V', 18, s32) |
| #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32) |
| #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32) |
| #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32) |
| #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32) |
| #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32) |
| |
| /** |
| * alloc_userspace() - Allocates a 64-bits userspace pointer compatible |
| * for calling the native 64-bits version of an ioctl. |
| * |
| * @size: size of the structure itself to be allocated. |
| * @aux_space: extra size needed to store "extra" data, e.g. space for |
| * other __user data that is pointed to fields inside the |
| * structure. |
| * @new_p64: pointer to a pointer to be filled with the allocated struct. |
| * |
| * Return: |
| * |
| * if it can't allocate memory, either -ENOMEM or -EFAULT will be returned. |
| * Zero otherwise. |
| */ |
| static int alloc_userspace(unsigned int size, u32 aux_space, |
| void __user **new_p64) |
| { |
| *new_p64 = compat_alloc_user_space(size + aux_space); |
| if (!*new_p64) |
| return -ENOMEM; |
| if (clear_user(*new_p64, size)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /** |
| * do_video_ioctl() - Ancillary function with 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 called when a 32 bits application calls a V4L2 ioctl |
| * and the Kernel is compiled with 64 bits. |
| * |
| * This function is called by v4l2_compat_ioctl32() when the function is |
| * not private to some specific driver. |
| * |
| * It converts a 32-bits struct into a 64 bits one, calls the native 64-bits |
| * ioctl handler and fills back the 32-bits struct with the results of the |
| * native call. |
| */ |
| static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| void __user *p32 = compat_ptr(arg); |
| void __user *new_p64 = NULL; |
| void __user *aux_buf; |
| u32 aux_space; |
| int compatible_arg = 1; |
| long err = 0; |
| |
| /* |
| * 1. When struct size is different, converts the command. |
| */ |
| switch (cmd) { |
| case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break; |
| case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break; |
| case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break; |
| case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break; |
| case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break; |
| case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break; |
| case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break; |
| case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break; |
| case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break; |
| case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break; |
| case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break; |
| case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break; |
| case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break; |
| case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break; |
| case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break; |
| case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break; |
| case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break; |
| case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break; |
| case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break; |
| case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break; |
| case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break; |
| case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break; |
| case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break; |
| case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break; |
| case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break; |
| } |
| |
| /* |
| * 2. Allocates a 64-bits userspace pointer to store the |
| * values of the ioctl and copy data from the 32-bits __user |
| * argument into it. |
| */ |
| switch (cmd) { |
| case VIDIOC_OVERLAY: |
| case VIDIOC_STREAMON: |
| case VIDIOC_STREAMOFF: |
| case VIDIOC_S_INPUT: |
| case VIDIOC_S_OUTPUT: |
| err = alloc_userspace(sizeof(unsigned int), 0, &new_p64); |
| if (!err && assign_in_user((unsigned int __user *)new_p64, |
| (compat_uint_t __user *)p32)) |
| err = -EFAULT; |
| compatible_arg = 0; |
| break; |
| |
| case VIDIOC_G_INPUT: |
| case VIDIOC_G_OUTPUT: |
| err = alloc_userspace(sizeof(unsigned int), 0, &new_p64); |
| compatible_arg = 0; |
| break; |
| |
| case VIDIOC_G_EDID: |
| case VIDIOC_S_EDID: |
| err = alloc_userspace(sizeof(struct v4l2_edid), 0, &new_p64); |
| if (!err) |
| err = get_v4l2_edid32(new_p64, p32); |
| compatible_arg = 0; |
| break; |
| |
| case VIDIOC_G_FMT: |
| case VIDIOC_S_FMT: |
| case VIDIOC_TRY_FMT: |
| err = bufsize_v4l2_format(p32, &aux_space); |
| if (!err) |
| err = alloc_userspace(sizeof(struct v4l2_format), |
| aux_space, &new_p64); |
| if (!err) { |
| aux_buf = new_p64 + sizeof(struct v4l2_format); |
| err = get_v4l2_format32(new_p64, p32, |
| aux_buf, aux_space); |
| } |
| compatible_arg = 0; |
| break; |
| |
| case VIDIOC_CREATE_BUFS: |
| err = bufsize_v4l2_create(p32, &aux_space); |
| if (!err) |
| err = alloc_userspace(sizeof(struct v4l2_create_buffers), |
| aux_space, &new_p64); |
| if (!err) { |
| aux_buf = new_p64 + sizeof(struct v4l2_create_buffers); |
| err = get_v4l2_create32(new_p64, p32, |
| aux_buf, aux_space); |
| } |
| compatible_arg = 0; |
| break; |
| |
| case VIDIOC_PREPARE_BUF: |
| case VIDIOC_QUERYBUF: |
| case VIDIOC_QBUF: |
| case VIDIOC_DQBUF: |
| err = bufsize_v4l2_buffer(p32, &aux_space); |
| if (!err) |
| err = alloc_userspace(sizeof(struct v4l2_buffer), |
| aux_space, &new_p64); |
| if (!err) { |
| aux_buf = new_p64 + sizeof(struct v4l2_buffer); |
| err = get_v4l2_buffer32(new_p64, p32, |
| aux_buf, aux_space); |
| } |
| compatible_arg = 0; |
| break; |
| |
| case VIDIOC_S_FBUF: |
| err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0, |
| &new_p64); |
| if (!err) |
| err = get_v4l2_framebuffer32(new_p64, p32); |
| compatible_arg = 0; |
| break; |
| |
| case VIDIOC_G_FBUF: |
| err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0, |
| &new_p64); |
| compatible_arg = 0; |
| break; |
| |
| case VIDIOC_ENUMSTD: |
| err = alloc_userspace(sizeof(struct v4l2_standard), 0, |
| &new_p64); |
| if (!err) |
| err = get_v4l2_standard32(new_p64, p32); |
| compatible_arg = 0; |
| break; |
| |
| case VIDIOC_ENUMINPUT: |
| err = alloc_userspace(sizeof(struct v4l2_input), 0, &new_p64); |
| if (!err) |
| err = get_v4l2_input32(new_p64, p32); |
| compatible_arg = 0; |
| break; |
| |
| case VIDIOC_G_EXT_CTRLS: |
| case VIDIOC_S_EXT_CTRLS: |
| case VIDIOC_TRY_EXT_CTRLS: |
| err = bufsize_v4l2_ext_controls(p32, &aux_space); |
| if (!err) |
| err = alloc_userspace(sizeof(struct v4l2_ext_controls), |
| aux_space, &new_p64); |
| if (!err) { |
| aux_buf = new_p64 + sizeof(struct v4l2_ext_controls); |
| err = get_v4l2_ext_controls32(file, new_p64, p32, |
| aux_buf, aux_space); |
| } |
| compatible_arg = 0; |
| break; |
| case VIDIOC_DQEVENT: |
| err = alloc_userspace(sizeof(struct v4l2_event), 0, &new_p64); |
| compatible_arg = 0; |
| break; |
| } |
| if (err) |
| return err; |
| |
| /* |
| * 3. Calls the native 64-bits ioctl handler. |
| * |
| * For the functions where a conversion was not needed, |
| * compatible_arg is true, and it will call it with the arguments |
| * provided by userspace and stored at @p32 var. |
| * |
| * Otherwise, it will pass the newly allocated @new_p64 argument. |
| */ |
| if (compatible_arg) |
| err = native_ioctl(file, cmd, (unsigned long)p32); |
| else |
| err = native_ioctl(file, cmd, (unsigned long)new_p64); |
| |
| if (err == -ENOTTY) |
| return err; |
| |
| /* |
| * 4. Special case: even after an error we need to put the |
| * results back for some ioctls. |
| * |
| * In the case of EXT_CTRLS, the error_idx will contain information |
| * on which control failed. |
| * |
| * In the case of S_EDID, the driver can return E2BIG and set |
| * the blocks to maximum allowed value. |
| */ |
| switch (cmd) { |
| case VIDIOC_G_EXT_CTRLS: |
| case VIDIOC_S_EXT_CTRLS: |
| case VIDIOC_TRY_EXT_CTRLS: |
| if (put_v4l2_ext_controls32(file, new_p64, p32)) |
| err = -EFAULT; |
| break; |
| case VIDIOC_S_EDID: |
| if (put_v4l2_edid32(new_p64, p32)) |
| err = -EFAULT; |
| break; |
| } |
| if (err) |
| return err; |
| |
| /* |
| * 5. Copy the data returned at the 64 bits userspace pointer to |
| * the original 32 bits structure. |
| */ |
| switch (cmd) { |
| case VIDIOC_S_INPUT: |
| case VIDIOC_S_OUTPUT: |
| case VIDIOC_G_INPUT: |
| case VIDIOC_G_OUTPUT: |
| if (assign_in_user((compat_uint_t __user *)p32, |
| ((unsigned int __user *)new_p64))) |
| err = -EFAULT; |
| break; |
| |
| case VIDIOC_G_FBUF: |
| err = put_v4l2_framebuffer32(new_p64, p32); |
| break; |
| |
| case VIDIOC_DQEVENT: |
| err = put_v4l2_event32(new_p64, p32); |
| break; |
| |
| case VIDIOC_G_EDID: |
| err = put_v4l2_edid32(new_p64, p32); |
| break; |
| |
| case VIDIOC_G_FMT: |
| case VIDIOC_S_FMT: |
| case VIDIOC_TRY_FMT: |
| err = put_v4l2_format32(new_p64, p32); |
| break; |
| |
| case VIDIOC_CREATE_BUFS: |
| err = put_v4l2_create32(new_p64, p32); |
| break; |
| |
| case VIDIOC_PREPARE_BUF: |
| case VIDIOC_QUERYBUF: |
| case VIDIOC_QBUF: |
| case VIDIOC_DQBUF: |
| err = put_v4l2_buffer32(new_p64, p32); |
| break; |
| |
| case VIDIOC_ENUMSTD: |
| err = put_v4l2_standard32(new_p64, p32); |
| break; |
| |
| case VIDIOC_ENUMINPUT: |
| err = put_v4l2_input32(new_p64, p32); |
| 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 (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE) |
| ret = do_video_ioctl(file, cmd, 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); |