NFS: "[no]resvport" mount option changes mountd client too

If the admin has specified the "noresvport" option for an NFS mount
point, the kernel's NFS client uses an unprivileged source port for
the main NFS transport.  The kernel's mountd client should use an
unprivileged port in this case as well.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

3 files changed, 5 insertions, 1 deletions

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 4e983961346e..340ede8f608f 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -72,6 +72,7 @@ struct nfs_mount_request {
         u32                     version;
         unsigned short          protocol;
         struct nfs_fh           *fh;
+        int                     noresvport;
 };
 
 extern int nfs_mount(struct nfs_mount_request *info);
diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c
index 7e37113d37e3..ca905a5bb1ba 100644
--- a/fs/nfs/mount_clnt.c
+++ b/fs/nfs/mount_clnt.c
@@ -50,7 +50,6 @@ int nfs_mount(struct nfs_mount_request *info)
                 .program        = &mnt_program,
                 .version        = info->version,
                 .authflavor     = RPC_AUTH_UNIX,
-                .flags          = 0,
         };
         struct rpc_clnt         *mnt_clnt;
         int                     status;
@@ -59,6 +58,9 @@ int nfs_mount(struct nfs_mount_request *info)
                 (info->hostname ? info->hostname : "server"),
                         info->dirpath);
 
+        if (info->noresvport)
+                args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
+
         mnt_clnt = rpc_create(&args);
         if (IS_ERR(mnt_clnt))
                 goto out_clnt_err;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index e05a77be3068..d8e062fe76b1 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1345,6 +1345,7 @@ static int nfs_try_mount(struct nfs_parsed_mount_data *args,
                 .dirpath        = args->nfs_server.export_path,
                 .protocol       = args->mount_server.protocol,
                 .fh             = root_fh,
+                .noresvport     = args->flags & NFS_MOUNT_NORESVPORT,
         };
         int status;