NFSv4: Don't request cache consistency attributes on some writes
We don't need cache consistency information when we're doing O_DIRECT
writes. Ditto for the case of delegated writes.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index c746b0c..64b67f3 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3370,7 +3370,7 @@
}
if (task->tk_status >= 0) {
renew_lease(NFS_SERVER(inode), data->timestamp);
- nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
+ nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
}
return 0;
}
@@ -3401,15 +3401,30 @@
}
EXPORT_SYMBOL_GPL(nfs4_reset_write);
+static
+bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
+{
+ const struct nfs_pgio_header *hdr = data->header;
+
+ /* Don't request attributes for pNFS or O_DIRECT writes */
+ if (data->ds_clp != NULL || hdr->dreq != NULL)
+ return false;
+ /* Otherwise, request attributes if and only if we don't hold
+ * a delegation
+ */
+ return nfs_have_delegation(hdr->inode, FMODE_READ) == 0;
+}
+
static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
struct nfs_server *server = NFS_SERVER(data->header->inode);
- if (data->ds_clp) {
+ if (!nfs4_write_need_cache_consistency_data(data)) {
data->args.bitmask = NULL;
data->res.fattr = NULL;
} else
data->args.bitmask = server->cache_consistency_bitmask;
+
if (!data->write_done_cb)
data->write_done_cb = nfs4_write_done_cb;
data->res.server = server;