11a4240f4SWang Lei# 21a4240f4SWang Lei# Configuration for DNS Resolver 31a4240f4SWang Lei# 41a4240f4SWang Leiconfig DNS_RESOLVER 51a4240f4SWang Lei tristate "DNS Resolver support" 61a4240f4SWang Lei depends on NET && KEYS 71a4240f4SWang Lei help 81a4240f4SWang Lei Saying Y here will include support for the DNS Resolver key type 91a4240f4SWang Lei which can be used to make upcalls to perform DNS lookups in 101a4240f4SWang Lei userspace. 111a4240f4SWang Lei 121a4240f4SWang Lei DNS Resolver is used to query DNS server for information. Examples 131a4240f4SWang Lei being resolving a UNC hostname element to an IP address for CIFS or 141a4240f4SWang Lei performing a DNS query for AFSDB records so that AFS can locate a 151a4240f4SWang Lei cell's volume location database servers. 161a4240f4SWang Lei 171a4240f4SWang Lei DNS Resolver is used by the CIFS and AFS modules, and would support 185227bbb0SSteve French SMB2 later. DNS Resolver is supported by the userspace upcall 191a4240f4SWang Lei helper "/sbin/dns.resolver" via /etc/request-key.conf. 201a4240f4SWang Lei 211a4240f4SWang Lei See <file:Documentation/networking/dns_resolver.txt> for further 221a4240f4SWang Lei information. 231a4240f4SWang Lei 241a4240f4SWang Lei To compile this as a module, choose M here: the module will be called 251a4240f4SWang Lei dnsresolver. 261a4240f4SWang Lei 271a4240f4SWang Lei If unsure, say N. 28