NFS: change NFS mount error return when hostname/pathname too long

According to the mount(2) man page, the proper error return code for the
mount(2) system call when the special device name or the mounted-on
directory name is too long is ENAMETOOLONG.

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

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index ef36432..8ed5937 100644 (file)
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1155,13 +1155,13 @@ static int nfs_validate_mount_data(struct nfs_mount_data **options,
                        return -EINVAL;
                len = c - dev_name;
                if (len > sizeof(data->hostname))
-                       return -EINVAL;
+                       return -ENAMETOOLONG;
                strncpy(data->hostname, dev_name, len);
                args.nfs_server.hostname = data->hostname;
 
                c++;
                if (strlen(c) > NFS_MAXPATHLEN)
-                       return -EINVAL;
+                       return -ENAMETOOLONG;
                args.nfs_server.export_path = c;
 
                status = nfs_try_mount(&args, mntfh);
@@ -1677,7 +1677,7 @@ static int nfs4_validate_mount_data(struct nfs4_mount_data **options,
                /* while calculating len, pretend ':' is '\0' */
                len = c - dev_name;
                if (len > NFS4_MAXNAMLEN)
-                       return -EINVAL;
+                       return -ENAMETOOLONG;
                *hostname = kzalloc(len, GFP_KERNEL);
                if (*hostname == NULL)
                        return -ENOMEM;
@@ -1686,7 +1686,7 @@ static int nfs4_validate_mount_data(struct nfs4_mount_data **options,
                c++;                    /* step over the ':' */
                len = strlen(c);
                if (len > NFS4_MAXPATHLEN)
-                       return -EINVAL;
+                       return -ENAMETOOLONG;
                *mntpath = kzalloc(len + 1, GFP_KERNEL);
                if (*mntpath == NULL)
                        return -ENOMEM;