[PATCH] NFSD: add version field to nfsd_rpc_status_show handler

[Lorenzo Bianconi <lorenzo@kernel.org>]

Introduce version field to nfsd_rpc_status handler in order to help
the user to maintain backward compatibility.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 fs/nfsd/nfssvc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 33ad91dd3a2d..6d5feeeb09a7 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -1117,6 +1117,9 @@ int nfsd_stats_release(struct inode *inode, struct file *file)
 	return ret;
 }
 
+/* Increment NFSD_RPC_STATUS_VERSION adding new info to the handler */
+#define NFSD_RPC_STATUS_VERSION		1
+
 static int nfsd_rpc_status_show(struct seq_file *m, void *v)
 {
 	struct inode *inode = file_inode(m->file);
@@ -1125,6 +1128,8 @@ static int nfsd_rpc_status_show(struct seq_file *m, void *v)
 
 	rcu_read_lock();
 
+	seq_printf(m, "# version %u\n", NFSD_RPC_STATUS_VERSION);
+
 	for (i = 0; i < nn->nfsd_serv->sv_nrpools; i++) {
 		struct svc_rqst *rqstp;
 
-- 
2.41.0