[PATCH 31/32] NFS: Use the DNS resolver in the mount code.

Trond Myklebust
2009-08-19T23:41:03Z

In the referral code, use it to look up the new server's ip address if the
fs_locations attribute contains a hostname.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---
fs/nfs/nfs4namespace.c | 18 +++++++++++++++++-
1 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index ef22ee8..2636c26 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -17,6 +17,7 @@
#include <linux/inet.h>
#include "internal.h"
#include "nfs4_fs.h"
+#include "dns_resolve.h"

#define NFSDBG_FACILITY NFSDBG_VFS

@@ -95,6 +96,20 @@ static int nfs4_validate_fspath(const struct vfsmount *mnt_parent,
return 0;
}

+static size_t nfs_parse_server_name(char *string, size_t len,
+ struct sockaddr *sa, size_t salen)
+{
+ ssize_t ret;
+
+ ret = rpc_pton(string, len, sa, salen);
+ if (ret == 0) {
+ ret = nfs_dns_resolve_name(string, len, sa, salen);
+ if (ret < 0)
+ ret = 0;
+ }
+ return ret;
+}
+
static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
char *page, char *page2,
const struct nfs4_fs_location *location)
@@ -121,7 +136,8 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,

if (memchr(buf->data, IPV6_SCOPE_DELIMITER, buf->len))
continue;
- mountdata->addrlen = rpc_pton(buf->data, buf->len,
+ mountdata->addrlen = nfs_parse_server_name(buf->data,
+ buf->len,
mountdata->addr, mountdata->addrlen);
if (mountdata->addrlen == 0)
continue;
--
1.6.0.4