NFS: Don't accept more reads/writes if the open context recovery failed

If the state recovery failed, we want to ensure that the application
doesn't try to use the same file descriptor for more reads or writes.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index a5e5d9899d56..70a26c651f09 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -514,6 +514,8 @@ void nfs_read_prepare(struct rpc_task *task, void *calldata)
 {
         struct nfs_read_data *data = calldata;
         NFS_PROTO(data->header->inode)->read_rpc_prepare(task, data);
+        if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
+                rpc_exit(task, -EIO);
 }
 
 static const struct rpc_call_ops nfs_read_common_ops = {