ioctl32.c

这个linux源代码是很全面的~基本完整了~使用c编译的~由于时间问题我没有亲自测试~但就算用来做参考资料也是非常好的

		err = copy_to_user ((struct hd_geometry32 *)arg, &geo, 4);
		err |= __put_user (geo.start, &(((struct hd_geometry32 *)arg)->start));
	}
	return err ? -EFAULT : 0;
}


#if 0
/* looks like SPARC only - eg sbus video */
struct  fbcmap32 {
	int             index;          /* first element (0 origin) */
	int             count;
	u32		red;
	u32		green;
	u32		blue;
};


static inline int fbiogetputcmap(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct fbcmap f;
	int ret;
	char red[256], green[256], blue[256];
	u32 r, g, b;
	mm_segment_t old_fs = get_fs();
	
	ret = get_user(f.index, &(((struct fbcmap32 *)arg)->index));
	ret |= __get_user(f.count, &(((struct fbcmap32 *)arg)->count));
	ret |= __get_user(r, &(((struct fbcmap32 *)arg)->red));
	ret |= __get_user(g, &(((struct fbcmap32 *)arg)->green));
	ret |= __get_user(b, &(((struct fbcmap32 *)arg)->blue));
	if (ret)
		return -EFAULT;
	if ((f.index < 0) || (f.index > 255)) return -EINVAL;
	if (f.index + f.count > 256)
		f.count = 256 - f.index;
	if (cmd == FBIOPUTCMAP32) {
		ret = copy_from_user (red, (char *)A(r), f.count);
		ret |= copy_from_user (green, (char *)A(g), f.count);
		ret |= copy_from_user (blue, (char *)A(b), f.count);
		if (ret)
			return -EFAULT;
	}
	f.red = red; f.green = green; f.blue = blue;
	set_fs (KERNEL_DS);
	ret = sys_ioctl (fd, (cmd == FBIOPUTCMAP32) ? FBIOPUTCMAP_SPARC : FBIOGETCMAP_SPARC, (long)&f);
	set_fs (old_fs);
	if (!ret && cmd == FBIOGETCMAP32) {
		ret = copy_to_user ((char *)A(r), red, f.count);
		ret |= copy_to_user ((char *)A(g), green, f.count);
		ret |= copy_to_user ((char *)A(b), blue, f.count);
	}
	return ret ? -EFAULT : 0;
}

struct fbcursor32 {
	short set;		/* what to set, choose from the list above */
	short enable;		/* cursor on/off */
	struct fbcurpos pos;	/* cursor position */
	struct fbcurpos hot;	/* cursor hot spot */
	struct fbcmap32 cmap;	/* color map info */
	struct fbcurpos size;	/* cursor bit map size */
	u32	image;		/* cursor image bits */
	u32	mask;		/* cursor mask bits */
};
	
static inline int fbiogscursor(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	struct fbcursor f;
	int ret;
	char red[2], green[2], blue[2];
	char image[128], mask[128];
	u32 r, g, b;
	u32 m, i;
	mm_segment_t old_fs = get_fs();
	
	ret = copy_from_user (&f, (struct fbcursor32 *)arg, 2 * sizeof (short) + 2 * sizeof(struct fbcurpos));
	ret |= __get_user(f.size.fbx, &(((struct fbcursor32 *)arg)->size.fbx));
	ret |= __get_user(f.size.fby, &(((struct fbcursor32 *)arg)->size.fby));
	ret |= __get_user(f.cmap.index, &(((struct fbcursor32 *)arg)->cmap.index));
	ret |= __get_user(f.cmap.count, &(((struct fbcursor32 *)arg)->cmap.count));
	ret |= __get_user(r, &(((struct fbcursor32 *)arg)->cmap.red));
	ret |= __get_user(g, &(((struct fbcursor32 *)arg)->cmap.green));
	ret |= __get_user(b, &(((struct fbcursor32 *)arg)->cmap.blue));
	ret |= __get_user(m, &(((struct fbcursor32 *)arg)->mask));
	ret |= __get_user(i, &(((struct fbcursor32 *)arg)->image));
	if (ret)
		return -EFAULT;
	if (f.set & FB_CUR_SETCMAP) {
		if ((uint) f.size.fby > 32)
			return -EINVAL;
		ret = copy_from_user (mask, (char *)A(m), f.size.fby * 4);
		ret |= copy_from_user (image, (char *)A(i), f.size.fby * 4);
		if (ret)
			return -EFAULT;
		f.image = image; f.mask = mask;
	}
	if (f.set & FB_CUR_SETCMAP) {
		ret = copy_from_user (red, (char *)A(r), 2);
		ret |= copy_from_user (green, (char *)A(g), 2);
		ret |= copy_from_user (blue, (char *)A(b), 2);
		if (ret)
			return -EFAULT;
		f.cmap.red = red; f.cmap.green = green; f.cmap.blue = blue;
	}
	set_fs (KERNEL_DS);
	ret = sys_ioctl (fd, FBIOSCURSOR, (long)&f);
	set_fs (old_fs);
	return ret;
}
#endif /* 0 */

struct fb_fix_screeninfo32 {
	char			id[16];
        __kernel_caddr_t32	smem_start;
	__u32			smem_len;
	__u32			type;
	__u32			type_aux;
	__u32			visual;
	__u16			xpanstep;
	__u16			ypanstep;
	__u16			ywrapstep;
	__u32			line_length;
        __kernel_caddr_t32	mmio_start;
	__u32			mmio_len;
	__u32			accel;
	__u16			reserved[3];
};

struct fb_cmap32 {
	__u32			start;
	__u32			len;
	__kernel_caddr_t32	red;
	__kernel_caddr_t32	green;
	__kernel_caddr_t32	blue;
	__kernel_caddr_t32	transp;
};

static int fb_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	u32 red = 0, green = 0, blue = 0, transp = 0;
	struct fb_fix_screeninfo fix;
	struct fb_cmap cmap;
	void *karg;
	int err = 0;

	memset(&cmap, 0, sizeof(cmap));
	switch (cmd) {
	case FBIOGET_FSCREENINFO:
		karg = &fix;
		break;
	case FBIOGETCMAP:
	case FBIOPUTCMAP:
		karg = &cmap;
		err = __get_user(cmap.start, &((struct fb_cmap32 *)arg)->start);
		err |= __get_user(cmap.len, &((struct fb_cmap32 *)arg)->len);
		err |= __get_user(red, &((struct fb_cmap32 *)arg)->red);
		err |= __get_user(green, &((struct fb_cmap32 *)arg)->green);
		err |= __get_user(blue, &((struct fb_cmap32 *)arg)->blue);
		err |= __get_user(transp, &((struct fb_cmap32 *)arg)->transp);
		if (err) {
			err = -EFAULT;
			goto out;
		}
		err = -ENOMEM;
		cmap.red = kmalloc(cmap.len * sizeof(__u16), GFP_KERNEL);
		if (!cmap.red)
			goto out;
		cmap.green = kmalloc(cmap.len * sizeof(__u16), GFP_KERNEL);
		if (!cmap.green)
			goto out;
		cmap.blue = kmalloc(cmap.len * sizeof(__u16), GFP_KERNEL);
		if (!cmap.blue)
			goto out;
		if (transp) {
			cmap.transp = kmalloc(cmap.len * sizeof(__u16), GFP_KERNEL);
			if (!cmap.transp)
				goto out;
		}
			
		if (cmd == FBIOGETCMAP)
			break;

		err = __copy_from_user(cmap.red, (char *)A(red), cmap.len * sizeof(__u16));
		err |= __copy_from_user(cmap.green, (char *)A(green), cmap.len * sizeof(__u16));
		err |= __copy_from_user(cmap.blue, (char *)A(blue), cmap.len * sizeof(__u16));
		if (cmap.transp) err |= __copy_from_user(cmap.transp, (char *)A(transp), cmap.len * sizeof(__u16));
		if (err) {
			err = -EFAULT;
			goto out;
		}
		break;
	default:
		do {
			static int count = 0;
			if (++count <= 20)
				printk(KERN_WARNING
					"%s: Unknown fb ioctl cmd fd(%d) "
					"cmd(%08x) arg(%08lx)\n",
					__FUNCTION__, fd, cmd, arg);
		} while(0);
		return -ENOSYS;
	}
	set_fs(KERNEL_DS);
	err = sys_ioctl(fd, cmd, (unsigned long)karg);
	set_fs(old_fs);
	if (err)
		goto out;
	switch (cmd) {
		struct fb_fix_screeninfo32 fix32;
	case FBIOGET_FSCREENINFO:
		memset(&fix32, 0, sizeof(fix32));
		memcpy(fix32.id, fix.id, sizeof(fix32.id));
		fix32.smem_start = (__u32)(unsigned long)fix.smem_start;
		fix32.smem_len	= fix.smem_len;
		fix32.type	= fix.type;
		fix32.type_aux	= fix.type_aux;
		fix32.visual	= fix.visual;
		fix32.xpanstep	= fix.xpanstep;
		fix32.ypanstep	= fix.ypanstep;
		fix32.ywrapstep = fix.ywrapstep;
		fix32.line_length = fix.line_length;
		fix32.mmio_start = (__u32)(unsigned long)fix.mmio_start;
		fix32.mmio_len	= fix.mmio_len;
		fix32.accel	= fix.accel;
		memcpy(fix32.reserved, fix.reserved, sizeof(fix32.reserved));
		err = __copy_to_user((void *) arg, (const void *) &fix32, sizeof(fix32));

printk("fix  : %lx %x  %x %x %x  %x %x %x %x  %lx %x %x\n",
	fix.smem_start, fix.smem_len,
	fix.type, fix.type_aux, fix.visual,
	fix.xpanstep, fix.ypanstep, fix.ywrapstep, fix.line_length,
	fix.mmio_start, fix.mmio_len, fix.accel);
printk("fix32: %x %x  %x %x %x  %x %x %x %x  %x %x %x\n",
	fix32.smem_start, fix32.smem_len,
	fix32.type, fix32.type_aux, fix32.visual,
	fix32.xpanstep, fix32.ypanstep, fix32.ywrapstep, fix32.line_length,
	fix32.mmio_start, fix32.mmio_len, fix32.accel);

		break;
	case FBIOGETCMAP:
		err = __copy_to_user((char *)A(red), cmap.red, cmap.len * sizeof(__u16));
		err |= __copy_to_user((char *)A(green), cmap.blue, cmap.len * sizeof(__u16));
		err |= __copy_to_user((char *)A(blue), cmap.blue, cmap.len * sizeof(__u16));
		if (cmap.transp)
			err |= __copy_to_user((char *)A(transp), cmap.transp, cmap.len * sizeof(__u16));
		break;
	case FBIOPUTCMAP:
		break;
	}
	if (err)
		err = -EFAULT;

out:	if (cmap.red) kfree(cmap.red);
	if (cmap.green) kfree(cmap.green);
	if (cmap.blue) kfree(cmap.blue);
	if (cmap.transp) kfree(cmap.transp);
	return err;
}

static int hdio_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	unsigned long kval;
	unsigned int *uvp;
	int error;

	set_fs(KERNEL_DS);
	error = sys_ioctl(fd, cmd, (long)&kval);
	set_fs(old_fs);

	if(error == 0) {
		uvp = (unsigned int *)arg;
		if(put_user(kval, uvp))
			error = -EFAULT;
	}
	return error;
}

struct floppy_struct32 {
	unsigned int	size;
	unsigned int	sect;
	unsigned int	head;
	unsigned int	track;
	unsigned int	stretch;
	unsigned char	gap;
	unsigned char	rate;
	unsigned char	spec1;
	unsigned char	fmt_gap;
	const __kernel_caddr_t32 name;
};

struct floppy_drive_params32 {
	char		cmos;
	u32		max_dtr;
	u32		hlt;
	u32		hut;
	u32		srt;
	u32		spinup;
	u32		spindown;
	unsigned char	spindown_offset;
	unsigned char	select_delay;
	unsigned char	rps;
	unsigned char	tracks;
	u32		timeout;
	unsigned char	interleave_sect;
	struct floppy_max_errors max_errors;
	char		flags;
	char		read_track;
	short		autodetect[8];
	int		checkfreq;
	int		native_format;
};

struct floppy_drive_struct32 {
	signed char	flags;
	u32		spinup_date;
	u32		select_date;
	u32		first_read_date;
	short		probed_format;
	short		track;
	short		maxblock;
	short		maxtrack;
	int		generation;
	int		keep_data;
	int		fd_ref;
	int		fd_device;
	int		last_checked;
	__kernel_caddr_t32 dmabuf;
	int		bufblocks;
};

struct floppy_fdc_state32 {
	int		spec1;
	int		spec2;
	int		dtr;
	unsigned char	version;
	unsigned char	dor;
	u32		address;
	unsigned int	rawcmd:2;
	unsigned int	reset:1;
	unsigned int	need_configure:1;
	unsigned int	perp_mode:2;
	unsigned int	has_fifo:1;
	unsigned int	driver_version;
	unsigned char	track[4];
};

struct floppy_write_errors32 {
	unsigned int	write_errors;
	u32		first_error_sector;
	int		first_error_generation;
	u32		last_error_sector;
	int		last_error_generation;
	unsigned int	badness;
};

#define FDSETPRM32 _IOW(2, 0x42, struct floppy_struct32)
#define FDDEFPRM32 _IOW(2, 0x43, struct floppy_struct32)
#define FDGETPRM32 _IOR(2, 0x04, struct floppy_struct32)
#define FDSETDRVPRM32 _IOW(2, 0x90, struct floppy_drive_params32)
#define FDGETDRVPRM32 _IOR(2, 0x11, struct floppy_drive_params32)
#define FDGETDRVSTAT32 _IOR(2, 0x12, struct floppy_drive_struct32)
#define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct floppy_drive_struct32)
#define FDGETFDCSTAT32 _IOR(2, 0x15, struct floppy_fdc_state32)
#define FDWERRORGET32  _IOR(2, 0x17, struct floppy_write_errors32)

static struct {
	unsigned int	cmd32;
	unsigned int	cmd;
} fd_ioctl_trans_table[] = {
	{ FDSETPRM32, FDSETPRM },
	{ FDDEFPRM32, FDDEFPRM },
	{ FDGETPRM32, FDGETPRM },
	{ FDSETDRVPRM32, FDSETDRVPRM },
	{ FDGETDRVPRM32, FDGETDRVPRM },
	{ FDGETDRVSTAT32, FDGETDRVSTAT },
	{ FDPOLLDRVSTAT32, FDPOLLDRVSTAT },
	{ FDGETFDCSTAT32, FDGETFDCSTAT },
	{ FDWERRORGET32, FDWERRORGET }
};

#define NR_FD_IOCTL_TRANS (sizeof(fd_ioctl_trans_table)/sizeof(fd_ioctl_trans_table[0]))

static int fd_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	mm_segment_t old_fs = get_fs();
	void *karg = NULL;
	unsigned int kcmd = 0;
	int i, err;

	for (i = 0; i < NR_FD_IOCTL_TRANS; i++)
		if (cmd == fd_ioctl_trans_table[i].cmd32) {
			kcmd = fd_ioctl_trans_table[i].cmd;
			break;
		}
	if (!kcmd)
		return -EINVAL;

	switch (cmd) {
		case FDSETPRM32:
		case FDDEFPRM32:
		case FDGETPRM32:
		{
			struct floppy_struct *f;

			f = karg = kmalloc(sizeof(struct floppy_struct), GFP_KERNEL);
			if (!karg)
				return -ENOMEM;
			if (cmd == FDGETPRM32)
				break;
			err = __get_user(f->size, &((struct floppy_struct32 *)arg)->size);
			err |= __get_user(f->sect, &((struct floppy_struct32 *)arg)->sect);
			err |= __get_user(f->head, &((struct floppy_struct32 *)arg)->head);
			err |= __get_user(f->track, &((struct floppy_struct32 *)arg)->track);
			err |= __get_user(f->stretch, &((struct floppy_struct32 *)arg)->stretch);
			err |= __get_user(f->gap, &((struct floppy_struct32 *)arg)->gap);
			err |= __get_user(f->rate, &((struct floppy_struct32 *)arg)->rate);
			err |= __get_user(f->spec1, &((struct floppy_struct32 *)arg)->spec1);
			err |= __get_user(f->fmt_gap, &((struct floppy_struct32 *)arg)->fmt_gap);
			err |= __get_user((u64)f->name, &((struct floppy_struct32 *)arg)->name);
			if (err) {
				err = -EFAULT;
				goto out;
			}
			break;
		}
		case FDSETDRVPRM32:
		case FDGETDRVPRM32:
		{
			struct floppy_drive_params *f;

			f = karg = kmalloc(sizeof(struct floppy_drive_params), GFP_KERNEL);
			if (!karg)
				return -ENOMEM;
			if (cmd == FDGETDRVPRM32)
				break;
			err = __get_user(f->cmos, &((struct floppy_drive_params32 *)arg)->cmos);
			err |= __get_user(f->max_dtr, &((struct floppy_drive_params32 *)arg)->max_dtr);
			err |= __get_user(f->hlt, &((struct floppy_drive_params32 *)arg)->hlt);
			err |= __get_user(f->hut, &((struct floppy_drive_params32 *)arg)->hut);
			err |= __get_user(f->srt, &((struct floppy_drive_params32 *)arg)->srt);
			err |= __get_user(f->spinup, &((struct floppy_drive_params32 *)arg)->spinup);
			err |= __get_user(f->spindown, &((struct floppy_drive_params32 *)arg)->spindown);
			err |= __get_user(f->spindown_offset, &((struct floppy_drive_params32 *)arg)->spindown_offset);
			err |= __get_user(f->select_delay, &((struct floppy_drive_params32 *)arg)->select_delay);
			err |= __get_user(f->rps, &((struct floppy_drive_params32 *)arg)->rps);
			err |= __get_user(f->tracks, &((struct floppy_drive_params32 *)arg)->tracks);