Exemplos de dn_dev_set_default em C++ (Cpp)

Exemplo n.º 1

Arquivo: sysctl_net_decnet.c Projeto: xricson/knoppix

static int dn_def_dev_strategy(ctl_table *table, int *name, int nlen,
				void *oldval, size_t *oldlenp,
				void *newval, size_t newlen,
				void **context)
{
	size_t len;
	struct net_device *dev;
	char devname[17];
	size_t namel;
	int rv = 0;

	devname[0] = 0;

	if (oldval && oldlenp) {
		if (get_user(len, oldlenp))
			return -EFAULT;
		if (len) {
			dev = dn_dev_get_default();
			if (dev) {
				strcpy(devname, dev->name);
				dev_put(dev);
			}

			namel = strlen(devname) + 1;
			if (len > namel) len = namel;	

			if (copy_to_user(oldval, devname, len))
				return -EFAULT;

			if (put_user(len, oldlenp))
				return -EFAULT;
		}
	}

	if (newval && newlen) {
		if (newlen > 16)
			return -E2BIG;

		if (copy_from_user(devname, newval, newlen))
			return -EFAULT;

		devname[newlen] = 0;

		dev = dev_get_by_name(devname);
		if (dev == NULL)
			return -ENODEV;

		rv = -ENODEV;
		if (dev->dn_ptr != NULL) {
			rv = dn_dev_set_default(dev, 1);
			if (rv)
				dev_put(dev);
		}
	}

	return rv;
}

Exemplo n.º 2

Arquivo: sysctl_net_decnet.c Projeto: AshishNamdev/linux

static int dn_def_dev_handler(struct ctl_table *table, int write,
				void __user *buffer,
				size_t *lenp, loff_t *ppos)
{
	size_t len;
	struct net_device *dev;
	char devname[17];

	if (!*lenp || (*ppos && !write)) {
		*lenp = 0;
		return 0;
	}

	if (write) {
		if (*lenp > 16)
			return -E2BIG;

		if (copy_from_user(devname, buffer, *lenp))
			return -EFAULT;

		devname[*lenp] = 0;
		strip_it(devname);

		dev = dev_get_by_name(&init_net, devname);
		if (dev == NULL)
			return -ENODEV;

		if (dev->dn_ptr == NULL) {
			dev_put(dev);
			return -ENODEV;
		}

		if (dn_dev_set_default(dev, 1)) {
			dev_put(dev);
			return -ENODEV;
		}
		*ppos += *lenp;

		return 0;
	}

	dev = dn_dev_get_default();
	if (dev == NULL) {
		*lenp = 0;
		return 0;
	}

	strcpy(devname, dev->name);
	dev_put(dev);
	len = strlen(devname);
	devname[len++] = '\n';

	if (len > *lenp) len = *lenp;

	if (copy_to_user(buffer, devname, len))
		return -EFAULT;

	*lenp = len;
	*ppos += len;

	return 0;
}