NFS: Improve debugging output in NFS in-kernel mount client

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

1 files changed, 26 insertions, 2 deletions

diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c
index 961dc5243277..8afd9f7e7a97 100644
--- a/fs/nfs/mount_clnt.c
+++ b/fs/nfs/mount_clnt.c
@@ -66,7 +66,7 @@ int nfs_mount(struct sockaddr *addr, size_t len, char *hostname, char *path,
 
         mnt_clnt = rpc_create(&args);
         if (IS_ERR(mnt_clnt))
-                return PTR_ERR(mnt_clnt);
+                goto out_clnt_err;
 
         if (version == NFS_MNT3_VERSION)
                 msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT];
@@ -75,7 +75,31 @@ int nfs_mount(struct sockaddr *addr, size_t len, char *hostname, char *path,
 
         status = rpc_call_sync(mnt_clnt, &msg, 0);
         rpc_shutdown_client(mnt_clnt);
-        return status < 0? status : (result.status? -EACCES : 0);
+
+        if (status < 0)
+                goto out_call_err;
+        if (result.status != 0)
+                goto out_mnt_err;
+
+        dprintk("NFS: MNT request succeeded\n");
+        status = 0;
+
+out:
+        return status;
+
+out_clnt_err:
+        status = PTR_ERR(mnt_clnt);
+        dprintk("NFS: failed to create RPC client, status=%d\n", status);
+        goto out;
+
+out_call_err:
+        dprintk("NFS: failed to start MNT request, status=%d\n", status);
+        goto out;
+
+out_mnt_err:
+        dprintk("NFS: MNT server returned result %d\n", result.status);
+        status = -EACCES;
+        goto out;
 }
 
 /*