diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/v4l2-ioctl.c | 91 |
1 files changed, 78 insertions, 13 deletions
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c index e2f77bc15954..7a15f351395f 100644 --- a/drivers/media/video/v4l2-ioctl.c +++ b/drivers/media/video/v4l2-ioctl.c @@ -396,12 +396,22 @@ struct v4l2_ioctl_info { unsigned int ioctl; u32 flags; const char * const name; + union { + u32 offset; + int (*func)(const struct v4l2_ioctl_ops *ops, + struct file *file, void *fh, void *p); + }; + void (*debug)(const void *arg, bool write_only); }; /* This control needs a priority check */ #define INFO_FL_PRIO (1 << 0) /* This control can be valid if the filehandle passes a control handler. */ #define INFO_FL_CTRL (1 << 1) +/* This is a standard ioctl, no need for special code */ +#define INFO_FL_STD (1 << 2) +/* This is ioctl has its own function */ +#define INFO_FL_FUNC (1 << 3) /* Zero struct from after the field to the end */ #define INFO_FL_CLEAR(v4l2_struct, field) \ ((offsetof(struct v4l2_struct, field) + \ @@ -414,6 +424,24 @@ struct v4l2_ioctl_info { .name = #_ioctl, \ } +#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ + [_IOC_NR(_ioctl)] = { \ + .ioctl = _ioctl, \ + .flags = _flags | INFO_FL_STD, \ + .name = #_ioctl, \ + .offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ + .debug = _debug, \ + } + +#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ + [_IOC_NR(_ioctl)] = { \ + .ioctl = _ioctl, \ + .flags = _flags | INFO_FL_FUNC, \ + .name = #_ioctl, \ + .func = _func, \ + .debug = _debug, \ + } + static struct v4l2_ioctl_info v4l2_ioctls[] = { IOCTL_INFO(VIDIOC_QUERYCAP, 0), IOCTL_INFO(VIDIOC_ENUM_FMT, INFO_FL_CLEAR(v4l2_fmtdesc, type)), @@ -512,7 +540,7 @@ bool v4l2_is_known_ioctl(unsigned int cmd) external ioctl messages as well as internal V4L ioctl */ void v4l_printk_ioctl(unsigned int cmd) { - char *dir, *type; + const char *dir, *type; switch (_IOC_TYPE(cmd)) { case 'd': @@ -523,10 +551,11 @@ void v4l_printk_ioctl(unsigned int cmd) type = "v4l2"; break; } - printk("%s", v4l2_ioctls[_IOC_NR(cmd)].name); + pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); return; default: type = "unknown"; + break; } switch (_IOC_DIR(cmd)) { @@ -536,7 +565,7 @@ void v4l_printk_ioctl(unsigned int cmd) case _IOC_READ | _IOC_WRITE: dir = "rw"; break; default: dir = "*ERR*"; break; } - printk("%s ioctl '%c', dir=%s, #%d (0x%08x)", + pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); } EXPORT_SYMBOL(v4l_printk_ioctl); @@ -546,6 +575,9 @@ static long __video_do_ioctl(struct file *file, { struct video_device *vfd = video_devdata(file); const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; + bool write_only = false; + struct v4l2_ioctl_info default_info; + const struct v4l2_ioctl_info *info; void *fh = file->private_data; struct v4l2_fh *vfh = NULL; int use_fh_prio = 0; @@ -563,23 +595,40 @@ static long __video_do_ioctl(struct file *file, } if (v4l2_is_known_ioctl(cmd)) { - struct v4l2_ioctl_info *info = &v4l2_ioctls[_IOC_NR(cmd)]; + info = &v4l2_ioctls[_IOC_NR(cmd)]; if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) - return -ENOTTY; + goto done; if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { ret = v4l2_prio_check(vfd->prio, vfh->prio); if (ret) - return ret; + goto done; } + } else { + default_info.ioctl = cmd; + default_info.flags = 0; + default_info.debug = NULL; + info = &default_info; } - if ((vfd->debug & V4L2_DEBUG_IOCTL) && - !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) { + write_only = _IOC_DIR(cmd) == _IOC_WRITE; + if (info->debug && write_only && vfd->debug > V4L2_DEBUG_IOCTL) { v4l_print_ioctl(vfd->name, cmd); - printk(KERN_CONT "\n"); + pr_cont(": "); + info->debug(arg, write_only); + } + if (info->flags & INFO_FL_STD) { + typedef int (*vidioc_op)(struct file *file, void *fh, void *p); + const void *p = vfd->ioctl_ops; + const vidioc_op *vidioc = p + info->offset; + + ret = (*vidioc)(file, fh, arg); + goto done; + } else if (info->flags & INFO_FL_FUNC) { + ret = info->func(ops, file, fh, arg); + goto done; } switch (cmd) { @@ -2101,10 +2150,26 @@ static long __video_do_ioctl(struct file *file, break; } /* switch */ - if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) { - if (ret < 0) { - v4l_print_ioctl(vfd->name, cmd); - printk(KERN_CONT " error %ld\n", ret); +done: + if (vfd->debug) { + if (write_only && vfd->debug > V4L2_DEBUG_IOCTL) { + if (ret < 0) + printk(KERN_DEBUG "%s: error %ld\n", + video_device_node_name(vfd), ret); + return ret; + } + v4l_print_ioctl(vfd->name, cmd); + if (ret < 0) + pr_cont(": error %ld\n", ret); + else if (vfd->debug == V4L2_DEBUG_IOCTL) + pr_cont("\n"); + else if (!info->debug) + return ret; + else if (_IOC_DIR(cmd) == _IOC_NONE) + info->debug(arg, write_only); + else { + pr_cont(": "); + info->debug(arg, write_only); } } |