| # SPDX-License-Identifier: GPL-2.0-only |
| # |
| # Configuration for DNS Resolver |
| # |
| config DNS_RESOLVER |
| tristate "DNS Resolver support" |
| depends on KEYS |
| help |
| Saying Y here will include support for the DNS Resolver key type |
| which can be used to make upcalls to perform DNS lookups in |
| userspace. |
| |
| DNS Resolver is used to query DNS server for information. Examples |
| being resolving a UNC hostname element to an IP address for CIFS or |
| performing a DNS query for AFSDB records so that AFS can locate a |
| cell's volume location database servers. |
| |
| DNS Resolver is used by the CIFS and AFS modules, and would support |
| SMB2 later. DNS Resolver is supported by the userspace upcall |
| helper "/sbin/dns.resolver" via /etc/request-key.conf. |
| |
| See <file:Documentation/networking/dns_resolver.rst> for further |
| information. |
| |
| To compile this as a module, choose M here: the module will be called |
| dnsresolver. |
| |
| If unsure, say N. |
