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NFS: Use the DNS resolver in the mount code. 

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>
This commit is contained in:
Trond Myklebust 2009-08-19 18:12:34 -04:00
parent e571cbf1a4
commit 7d7ea88289
1 changed files with 17 additions and 1 deletions
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18
fs/nfs/nfs4namespace.c
View File

@ -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;