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authorTrond Myklebust <Trond.Myklebust@netapp.com>2009-08-19 18:12:27 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2009-08-19 18:22:15 -0400
commite571cbf1a4f8d8b6cfd4898df718dae84c75a8e1 (patch)
tree0fc9da9692a1e63cff03053fc87cc807fab5e266 /fs/nfs/dns_resolve.h
parent96c61cbd0f30496bfa57ed80f7131a57aea3e4de (diff)
downloadop-kernel-dev-e571cbf1a4f8d8b6cfd4898df718dae84c75a8e1.zip
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NFS: Add a dns resolver for use with NFSv4 referrals and migration
The NFSv4 and NFSv4.1 protocols both allow for the redirection of a client from one server to another in order to support filesystem migration and replication. For full protocol support, we need to add the ability to convert a DNS host name into an IP address that we can feed to the RPC client. We'll reuse the sunrpc cache, now that it has been converted to work with rpc_pipefs. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/dns_resolve.h')
-rw-r--r--fs/nfs/dns_resolve.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/nfs/dns_resolve.h b/fs/nfs/dns_resolve.h
new file mode 100644
index 0000000..a3f0938
--- /dev/null
+++ b/fs/nfs/dns_resolve.h
@@ -0,0 +1,14 @@
+/*
+ * Resolve DNS hostnames into valid ip addresses
+ */
+#ifndef __LINUX_FS_NFS_DNS_RESOLVE_H
+#define __LINUX_FS_NFS_DNS_RESOLVE_H
+
+#define NFS_DNS_HOSTNAME_MAXLEN (128)
+
+extern int nfs_dns_resolver_init(void);
+extern void nfs_dns_resolver_destroy(void);
+extern ssize_t nfs_dns_resolve_name(char *name, size_t namelen,
+ struct sockaddr *sa, size_t salen);
+
+#endif
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