pnfs/blocklayout: improve GETDEVICEINFO error reporting

Tell userspace what stage of GETDEVICEINFO failed so that there is a chance
to debug it, especially with the userspace daemon clusterf***k in the block
layout driver.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/nfs/blocklayout/blocklayoutdev.c b/fs/nfs/blocklayout/blocklayoutdev.c
index 04303b5c9361..63f77925aa87 100644
--- a/fs/nfs/blocklayout/blocklayoutdev.c
+++ b/fs/nfs/blocklayout/blocklayoutdev.c
@@ -150,7 +150,7 @@ nfs4_blk_decode_device(struct nfs_server *server,
         remove_wait_queue(&nn->bl_wq, &wq);
 
         if (reply->status != BL_DEVICE_REQUEST_PROC) {
-                dprintk("%s failed to open device: %d\n",
+                printk(KERN_WARNING "%s failed to decode device: %d\n",
                         __func__, reply->status);
                 rv = ERR_PTR(-EINVAL);
                 goto out;
@@ -159,7 +159,8 @@ nfs4_blk_decode_device(struct nfs_server *server,
         bd = blkdev_get_by_dev(MKDEV(reply->major, reply->minor),
                                FMODE_READ, NULL);
         if (IS_ERR(bd)) {
-                dprintk("%s failed to open device : %ld\n", __func__,
+                printk(KERN_WARNING "%s failed to open device %d:%d (%ld)\n",
+                        __func__, reply->major, reply->minor,
                         PTR_ERR(bd));
                 rv = ERR_CAST(bd);
                 goto out;