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