ipmi_devintf.c

linux-2.6.15.6

		if (copy_to_user(arg, &val, sizeof(val))) {
			rv = -EFAULT;
			break;
		}
		break;
	}

	case IPMICTL_SET_MY_LUN_CMD:
	{
		unsigned int val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_set_my_LUN(priv->user, 0, val);
		break;
	}

	case IPMICTL_GET_MY_LUN_CMD:
	{
		unsigned int  val;
		unsigned char rval;

		rv = ipmi_get_my_LUN(priv->user, 0, &rval);
		if (rv)
			break;

		val = rval;

		if (copy_to_user(arg, &val, sizeof(val))) {
			rv = -EFAULT;
			break;
		}
		break;
	}

	case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD:
	{
		struct ipmi_channel_lun_address_set val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		return ipmi_set_my_address(priv->user, val.channel, val.value);
		break;
	}

	case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD:
	{
		struct ipmi_channel_lun_address_set val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_get_my_address(priv->user, val.channel, &val.value);
		if (rv)
			break;

		if (copy_to_user(arg, &val, sizeof(val))) {
			rv = -EFAULT;
			break;
		}
		break;
	}

	case IPMICTL_SET_MY_CHANNEL_LUN_CMD:
	{
		struct ipmi_channel_lun_address_set val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_set_my_LUN(priv->user, val.channel, val.value);
		break;
	}

	case IPMICTL_GET_MY_CHANNEL_LUN_CMD:
	{
		struct ipmi_channel_lun_address_set val;

		if (copy_from_user(&val, arg, sizeof(val))) {
			rv = -EFAULT;
			break;
		}

		rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value);
		if (rv)
			break;

		if (copy_to_user(arg, &val, sizeof(val))) {
			rv = -EFAULT;
			break;
		}
		break;
	}

	case IPMICTL_SET_TIMING_PARMS_CMD:
	{
		struct ipmi_timing_parms parms;

		if (copy_from_user(&parms, arg, sizeof(parms))) {
			rv = -EFAULT;
			break;
		}

		priv->default_retries = parms.retries;
		priv->default_retry_time_ms = parms.retry_time_ms;
		rv = 0;
		break;
	}

	case IPMICTL_GET_TIMING_PARMS_CMD:
	{
		struct ipmi_timing_parms parms;

		parms.retries = priv->default_retries;
		parms.retry_time_ms = priv->default_retry_time_ms;

		if (copy_to_user(arg, &parms, sizeof(parms))) {
			rv = -EFAULT;
			break;
		}

		rv = 0;
		break;
	}
	}
  
	return rv;
}

#ifdef CONFIG_COMPAT

/*
 * The following code contains code for supporting 32-bit compatible
 * ioctls on 64-bit kernels.  This allows running 32-bit apps on the
 * 64-bit kernel
 */
#define COMPAT_IPMICTL_SEND_COMMAND	\
	_IOR(IPMI_IOC_MAGIC, 13, struct compat_ipmi_req)
#define COMPAT_IPMICTL_SEND_COMMAND_SETTIME	\
	_IOR(IPMI_IOC_MAGIC, 21, struct compat_ipmi_req_settime)
#define COMPAT_IPMICTL_RECEIVE_MSG	\
	_IOWR(IPMI_IOC_MAGIC, 12, struct compat_ipmi_recv)
#define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC	\
	_IOWR(IPMI_IOC_MAGIC, 11, struct compat_ipmi_recv)

struct compat_ipmi_msg {
	u8		netfn;
	u8		cmd;
	u16		data_len;
	compat_uptr_t	data;
};

struct compat_ipmi_req {
	compat_uptr_t		addr;
	compat_uint_t		addr_len;
	compat_long_t		msgid;
	struct compat_ipmi_msg	msg;
};

struct compat_ipmi_recv {
	compat_int_t		recv_type;
	compat_uptr_t		addr;
	compat_uint_t		addr_len;
	compat_long_t		msgid;
	struct compat_ipmi_msg	msg;
};

struct compat_ipmi_req_settime {
	struct compat_ipmi_req	req;
	compat_int_t		retries;
	compat_uint_t		retry_time_ms;
};

/*
 * Define some helper functions for copying IPMI data
 */
static long get_compat_ipmi_msg(struct ipmi_msg *p64,
				struct compat_ipmi_msg __user *p32)
{
	compat_uptr_t tmp;

	if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
			__get_user(p64->netfn, &p32->netfn) ||
			__get_user(p64->cmd, &p32->cmd) ||
			__get_user(p64->data_len, &p32->data_len) ||
			__get_user(tmp, &p32->data))
		return -EFAULT;
	p64->data = compat_ptr(tmp);
	return 0;
}

static long put_compat_ipmi_msg(struct ipmi_msg *p64,
				struct compat_ipmi_msg __user *p32)
{
	if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) ||
			__put_user(p64->netfn, &p32->netfn) ||
			__put_user(p64->cmd, &p32->cmd) ||
			__put_user(p64->data_len, &p32->data_len))
		return -EFAULT;
	return 0;
}

static long get_compat_ipmi_req(struct ipmi_req *p64,
				struct compat_ipmi_req __user *p32)
{

	compat_uptr_t	tmp;

	if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
			__get_user(tmp, &p32->addr) ||
			__get_user(p64->addr_len, &p32->addr_len) ||
			__get_user(p64->msgid, &p32->msgid) ||
			get_compat_ipmi_msg(&p64->msg, &p32->msg))
		return -EFAULT;
	p64->addr = compat_ptr(tmp);
	return 0;
}

static long get_compat_ipmi_req_settime(struct ipmi_req_settime *p64,
		struct compat_ipmi_req_settime __user *p32)
{
	if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
			get_compat_ipmi_req(&p64->req, &p32->req) ||
			__get_user(p64->retries, &p32->retries) ||
			__get_user(p64->retry_time_ms, &p32->retry_time_ms))
		return -EFAULT;
	return 0;
}

static long get_compat_ipmi_recv(struct ipmi_recv *p64,
				 struct compat_ipmi_recv __user *p32)
{
	compat_uptr_t tmp;

	if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
			__get_user(p64->recv_type, &p32->recv_type) ||
			__get_user(tmp, &p32->addr) ||
			__get_user(p64->addr_len, &p32->addr_len) ||
			__get_user(p64->msgid, &p32->msgid) ||
			get_compat_ipmi_msg(&p64->msg, &p32->msg))
		return -EFAULT;
	p64->addr = compat_ptr(tmp);
	return 0;
}

static long put_compat_ipmi_recv(struct ipmi_recv *p64,
				 struct compat_ipmi_recv __user *p32)
{
	if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) ||
			__put_user(p64->recv_type, &p32->recv_type) ||
			__put_user(p64->addr_len, &p32->addr_len) ||
			__put_user(p64->msgid, &p32->msgid) ||
			put_compat_ipmi_msg(&p64->msg, &p32->msg))
		return -EFAULT;
	return 0;
}

/*
 * Handle compatibility ioctls
 */
static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
			      unsigned long arg)
{
	int rc;
	struct ipmi_file_private *priv = filep->private_data;

	switch(cmd) {
	case COMPAT_IPMICTL_SEND_COMMAND:
	{
		struct ipmi_req	rp;

		if (get_compat_ipmi_req(&rp, compat_ptr(arg)))
			return -EFAULT;

		return handle_send_req(priv->user, &rp,
				priv->default_retries,
				priv->default_retry_time_ms);
	}
	case COMPAT_IPMICTL_SEND_COMMAND_SETTIME:
	{
		struct ipmi_req_settime	sp;

		if (get_compat_ipmi_req_settime(&sp, compat_ptr(arg)))
			return -EFAULT;

		return handle_send_req(priv->user, &sp.req,
				sp.retries, sp.retry_time_ms);
	}
	case COMPAT_IPMICTL_RECEIVE_MSG:
	case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC:
	{
		struct ipmi_recv   __user *precv64;
		struct ipmi_recv   recv64;

		if (get_compat_ipmi_recv(&recv64, compat_ptr(arg)))
			return -EFAULT;

		precv64 = compat_alloc_user_space(sizeof(recv64));
		if (copy_to_user(precv64, &recv64, sizeof(recv64)))
			return -EFAULT;

		rc = ipmi_ioctl(filep->f_dentry->d_inode, filep,
				((cmd == COMPAT_IPMICTL_RECEIVE_MSG)
				 ? IPMICTL_RECEIVE_MSG
				 : IPMICTL_RECEIVE_MSG_TRUNC),
				(unsigned long) precv64);
		if (rc != 0)
			return rc;

		if (copy_from_user(&recv64, precv64, sizeof(recv64)))
			return -EFAULT;

		if (put_compat_ipmi_recv(&recv64, compat_ptr(arg)))
			return -EFAULT;

		return rc;
	}
	default:
		return ipmi_ioctl(filep->f_dentry->d_inode, filep, cmd, arg);
	}
}
#endif

static struct file_operations ipmi_fops = {
	.owner		= THIS_MODULE,
	.ioctl		= ipmi_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl   = compat_ipmi_ioctl,
#endif
	.open		= ipmi_open,
	.release	= ipmi_release,
	.fasync		= ipmi_fasync,
	.poll		= ipmi_poll,
};

#define DEVICE_NAME     "ipmidev"

static int ipmi_major = 0;
module_param(ipmi_major, int, 0);
MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device.  By"
		 " default, or if you set it to zero, it will choose the next"
		 " available device.  Setting it to -1 will disable the"
		 " interface.  Other values will set the major device number"
		 " to that value.");

static struct class *ipmi_class;

static void ipmi_new_smi(int if_num)
{
	dev_t dev = MKDEV(ipmi_major, if_num);

	devfs_mk_cdev(dev, S_IFCHR | S_IRUSR | S_IWUSR,
		      "ipmidev/%d", if_num);

	class_device_create(ipmi_class, NULL, dev, NULL, "ipmi%d", if_num);
}

static void ipmi_smi_gone(int if_num)
{
	class_device_destroy(ipmi_class, MKDEV(ipmi_major, if_num));
	devfs_remove("ipmidev/%d", if_num);
}

static struct ipmi_smi_watcher smi_watcher =
{
	.owner    = THIS_MODULE,
	.new_smi  = ipmi_new_smi,
	.smi_gone = ipmi_smi_gone,
};

static __init int init_ipmi_devintf(void)
{
	int rv;

	if (ipmi_major < 0)
		return -EINVAL;

	printk(KERN_INFO "ipmi device interface\n");

	ipmi_class = class_create(THIS_MODULE, "ipmi");
	if (IS_ERR(ipmi_class)) {
		printk(KERN_ERR "ipmi: can't register device class\n");
		return PTR_ERR(ipmi_class);
	}

	rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops);
	if (rv < 0) {
		class_destroy(ipmi_class);
		printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major);
		return rv;
	}

	if (ipmi_major == 0) {
		ipmi_major = rv;
	}

	devfs_mk_dir(DEVICE_NAME);

	rv = ipmi_smi_watcher_register(&smi_watcher);
	if (rv) {
		unregister_chrdev(ipmi_major, DEVICE_NAME);
		class_destroy(ipmi_class);
		printk(KERN_WARNING "ipmi: can't register smi watcher\n");
		return rv;
	}

	return 0;
}
module_init(init_ipmi_devintf);

static __exit void cleanup_ipmi(void)
{
	class_destroy(ipmi_class);
	ipmi_smi_watcher_unregister(&smi_watcher);
	devfs_remove(DEVICE_NAME);
	unregister_chrdev(ipmi_major, DEVICE_NAME);
}
module_exit(cleanup_ipmi);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Corey Minyard <[e-mail]>");
MODULE_DESCRIPTION("Linux device interface for the IPMI message handler.");