We now have KD_FONT_OP_SET_TALL, but in fact such large fonts cannot be loaded. No console driver supports tall fonts. Unfortunately, userspace cannot distinguish the lack of support in the driver from errors in the font itself. In all cases, EINVAL will be returned. This patchset adds a separate ioctl to obtain the font parameters supported by the console driver. v5: * Use data types that are compatible with the uapi structure. * Use _IOR to define a new ioctl as required for new ioctls. v4: * Rebased on v6.9-rc1 and conflicts have been fixed. * Do not copy KDFONTINFO data from the userspace. * Header include/uapi/linux/kd.h uses _IOC macros to define ioctls. v3: * Added the use of the in_range macro. * Squashed the commits that add ioctl to console divers. v2: * Instead of the KDFONTOP extension, a new ioctl has been added to obtain font information. Alexey Gladkov (3): VT: Use macros to define ioctls VT: Add KDFONTINFO ioctl VT: Allow to get max font width and height drivers/tty/vt/vt.c | 24 ++++++ drivers/tty/vt/vt_ioctl.c | 13 ++++ drivers/video/console/newport_con.c | 21 +++++- drivers/video/console/sticon.c | 25 ++++++- drivers/video/console/vgacon.c | 21 +++++- drivers/video/fbdev/core/fbcon.c | 16 ++++ include/linux/console.h | 3 + include/linux/vt_kern.h | 1 + include/uapi/linux/kd.h | 110 ++++++++++++++++------------ 9 files changed, 180 insertions(+), 54 deletions(-) -- 2.44.0
