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-rw-r--r--fs/nfs/super.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 7e56411e55fc..48db52a7067a 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -992,6 +992,63 @@ out_unknown:
992} 992}
993 993
994/* 994/*
995 * Use the remote server's MOUNT service to request the NFS file handle
996 * corresponding to the provided path.
997 */
998static int nfs_try_mount(struct nfs_parsed_mount_data *args,
999 struct nfs_fh *root_fh)
1000{
1001 struct sockaddr_in sin;
1002 int status;
1003
1004 if (args->mount_server.version == 0) {
1005 if (args->flags & NFS_MOUNT_VER3)
1006 args->mount_server.version = NFS_MNT3_VERSION;
1007 else
1008 args->mount_server.version = NFS_MNT_VERSION;
1009 }
1010
1011 /*
1012 * Construct the mount server's address.
1013 */
1014 if (args->mount_server.address.sin_addr.s_addr != INADDR_ANY)
1015 sin = args->mount_server.address;
1016 else
1017 sin = args->nfs_server.address;
1018 if (args->mount_server.port == 0) {
1019 status = rpcb_getport_sync(&sin,
1020 args->mount_server.program,
1021 args->mount_server.version,
1022 args->mount_server.protocol);
1023 if (status < 0)
1024 goto out_err;
1025 sin.sin_port = htons(status);
1026 } else
1027 sin.sin_port = htons(args->mount_server.port);
1028
1029 /*
1030 * Now ask the mount server to map our export path
1031 * to a file handle.
1032 */
1033 status = nfs_mount((struct sockaddr *) &sin,
1034 sizeof(sin),
1035 args->nfs_server.hostname,
1036 args->nfs_server.export_path,
1037 args->mount_server.version,
1038 args->mount_server.protocol,
1039 root_fh);
1040 if (status < 0)
1041 goto out_err;
1042
1043 return status;
1044
1045out_err:
1046 dfprintk(MOUNT, "NFS: unable to contact server on host "
1047 NIPQUAD_FMT "\n", NIPQUAD(sin.sin_addr.s_addr));
1048 return status;
1049}
1050
1051/*
995 * Validate the NFS2/NFS3 mount data 1052 * Validate the NFS2/NFS3 mount data
996 * - fills in the mount root filehandle 1053 * - fills in the mount root filehandle
997 */ 1054 */