1 # SPDX-License-Identifier: GPL-2.0-only
3 # Configuration for DNS Resolver
6 tristate "DNS Resolver support"
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
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.
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.
22 See <file:Documentation/networking/dns_resolver.rst> for further
25 To compile this as a module, choose M here: the module will be called