1# SPDX-License-Identifier: GPL-2.0-only
2#
3# Configuration for DNS Resolver
4#
5config DNS_RESOLVER
6	tristate "DNS Resolver support"
7	depends on KEYS
8	help
9	  Saying Y here will include support for the DNS Resolver key type
10	  which can be used to make upcalls to perform DNS lookups in
11	  userspace.
12
13	  DNS Resolver is used to query DNS server for information.  Examples
14	  being resolving a UNC hostname element to an IP address for CIFS or
15	  performing a DNS query for AFSDB records so that AFS can locate a
16	  cell's volume location database servers.
17
18	  DNS Resolver is used by the CIFS and AFS modules, and would support
19	  SMB2 later.  DNS Resolver is supported by the userspace upcall
20	  helper "/sbin/dns.resolver" via /etc/request-key.conf.
21
22	  See <file:Documentation/networking/dns_resolver.rst> for further
23	  information.
24
25	  To compile this as a module, choose M here: the module will be called
26	  dnsresolver.
27
28	  If unsure, say N.
29