NFSv4.1: mark deviceid invalid on filelayout DS connection errors

This prevents the use of any layout for i/o that references the deviceid.
I/O is redirected through the MDS.

Redirect the unhandled failed I/O to the MDS without marking either the
layout or the deviceid invalid.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 6fdeca2fbc2a..16cc1948cb46 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1175,7 +1175,7 @@ pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
 }
 EXPORT_SYMBOL_GPL(pnfs_generic_pg_test);
 
-static int pnfs_write_done_resend_to_mds(struct inode *inode,
+int pnfs_write_done_resend_to_mds(struct inode *inode,
                                 struct list_head *head,
                                 const struct nfs_pgio_completion_ops *compl_ops)
 {
@@ -1203,6 +1203,7 @@ static int pnfs_write_done_resend_to_mds(struct inode *inode,
         }
         return 0;
 }
+EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds);
 
 static void pnfs_ld_handle_write_error(struct nfs_write_data *data)
 {
@@ -1329,7 +1330,7 @@ pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
 }
 EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages);
 
-static int pnfs_read_done_resend_to_mds(struct inode *inode,
+int pnfs_read_done_resend_to_mds(struct inode *inode,
                                 struct list_head *head,
                                 const struct nfs_pgio_completion_ops *compl_ops)
 {
@@ -1353,6 +1354,7 @@ static int pnfs_read_done_resend_to_mds(struct inode *inode,
         }
         return 0;
 }
+EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds);
 
 static void pnfs_ld_handle_read_error(struct nfs_read_data *data)
 {