Function netdump_ioctl

freebsd/netinet/netdump/netdump_client.c:461–658

* ioctl(2) handler for the netdump device. This is currently only used to * register netdump as a dump device. * * Parameters: * dev, Unused. * cmd, The ioctl to be handled. * addr, The parameter for the ioctl. * flags, Unused. * td, The thread invoking this ioctl. * * Returns: * 0 on success, and an errno value on failure. */

 *     0 on success, and an errno value on failure.
 */
static int
netdump_ioctl(struct cdev *dev __unused, u_long cmd, caddr_t addr,
    int flags __unused, struct thread *td)
{
	struct diocskerneldump_arg kda_copy, *conf;
	struct dumperinfo dumper;
	uint8_t *encryptedkey;
	int error;
#ifdef COMPAT_FREEBSD11
	u_int u;
#endif
#ifdef COMPAT_FREEBSD12
	struct diocskerneldump_arg_freebsd12 *kda12;
	struct netdump_conf_freebsd12 *conf12;
#endif

	conf = NULL;
	error = 0;
	NETDUMP_WLOCK();

	switch (cmd) {
#ifdef COMPAT_FREEBSD11
	case DIOCSKERNELDUMP_FREEBSD11:
		gone_in(13, "11.x ABI compatibility");
		u = *(u_int *)addr;
		if (u != 0) {
			error = ENXIO;
			break;
		}
		if (netdump_enabled())
			netdump_unconfigure();
		break;
#endif
#ifdef COMPAT_FREEBSD12
		/*
		 * Used by dumpon(8) in 12.x for clearing previous
		 * configuration -- then NETDUMPSCONF_FREEBSD12 is used to
		 * actually configure netdump.
		 */
	case DIOCSKERNELDUMP_FREEBSD12:
		gone_in(14, "12.x ABI compatibility");

		kda12 = (void *)addr;
		if (kda12->kda12_enable) {
			error = ENXIO;
			break;
		}
		if (netdump_enabled())
			netdump_unconfigure();
		break;

	case NETDUMPGCONF_FREEBSD12:
		gone_in(14, "FreeBSD 12.x ABI compat");
		conf12 = (void *)addr;

		if (!netdump_enabled()) {
			error = ENXIO;
			break;