NFS: Added support to turn off the NFSv3 READDIRPLUS RPC.
READDIRPLUS can be a performance hindrance when the client is working with
large directories. In addition, some servers still have bugs in their
implementations (e.g. Tru64 returns wrong values for the fsid).
Add a mount flag to enable users to turn it off at mount time following the
implementation in Apple's NFS client.
Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 2190e6c..5bd03b9 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -618,7 +618,8 @@
if (clp->cl_nfsversion == 3) {
if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
server->namelen = NFS3_MAXNAMLEN;
- server->caps |= NFS_CAP_READDIRPLUS;
+ if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
+ server->caps |= NFS_CAP_READDIRPLUS;
} else {
if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
server->namelen = NFS2_MAXNAMLEN;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 719464a..ca20d3c 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -290,6 +290,7 @@
{ NFS_MOUNT_NOAC, ",noac", "" },
{ NFS_MOUNT_NONLM, ",nolock", "" },
{ NFS_MOUNT_NOACL, ",noacl", "" },
+ { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" },
{ 0, NULL, NULL }
};
const struct proc_nfs_info *nfs_infop;