1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Resolve DNS hostnames into valid ip addresses
4  */
5 #ifndef __LINUX_FS_NFS_DNS_RESOLVE_H
6 #define __LINUX_FS_NFS_DNS_RESOLVE_H
7 
8 #define NFS_DNS_HOSTNAME_MAXLEN	(128)
9 
10 
11 #ifdef CONFIG_NFS_USE_KERNEL_DNS
nfs_dns_resolver_init(void)12 static inline int nfs_dns_resolver_init(void)
13 {
14 	return 0;
15 }
16 
nfs_dns_resolver_destroy(void)17 static inline void nfs_dns_resolver_destroy(void)
18 {}
19 
nfs_dns_resolver_cache_init(struct net * net)20 static inline int nfs_dns_resolver_cache_init(struct net *net)
21 {
22 	return 0;
23 }
24 
nfs_dns_resolver_cache_destroy(struct net * net)25 static inline void nfs_dns_resolver_cache_destroy(struct net *net)
26 {}
27 #else
28 extern int nfs_dns_resolver_init(void);
29 extern void nfs_dns_resolver_destroy(void);
30 extern int nfs_dns_resolver_cache_init(struct net *net);
31 extern void nfs_dns_resolver_cache_destroy(struct net *net);
32 #endif
33 
34 extern ssize_t nfs_dns_resolve_name(struct net *net, char *name,
35 		size_t namelen,	struct sockaddr *sa, size_t salen);
36 
37 #endif
38