From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/nfsd/nfssvc.c | 37 +++++++++++++++++++++++++++++++++++--
1 files changed, 35 insertions(+), 2 deletions(-)
diff --git a/kernel/fs/nfsd/nfssvc.c b/kernel/fs/nfsd/nfssvc.c
index 9323e30..2e61a56 100644
--- a/kernel/fs/nfsd/nfssvc.c
+++ b/kernel/fs/nfsd/nfssvc.c
@@ -426,8 +426,8 @@
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
- nfsd_file_cache_shutdown_net(net);
nfs4_state_shutdown_net(net);
+ nfsd_file_cache_shutdown_net(net);
if (nn->lockd_up) {
lockd_down(net);
nn->lockd_up = false;
@@ -600,6 +600,37 @@
.svo_module = THIS_MODULE,
};
+static void nfsd_complete_shutdown(struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ WARN_ON(!mutex_is_locked(&nfsd_mutex));
+
+ nn->nfsd_serv = NULL;
+ complete(&nn->nfsd_shutdown_complete);
+}
+
+void nfsd_shutdown_threads(struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ struct svc_serv *serv;
+
+ mutex_lock(&nfsd_mutex);
+ serv = nn->nfsd_serv;
+ if (serv == NULL) {
+ mutex_unlock(&nfsd_mutex);
+ return;
+ }
+
+ svc_get(serv);
+ /* Kill outstanding nfsd threads */
+ serv->sv_ops->svo_setup(serv, NULL, 0);
+ nfsd_destroy(net);
+ mutex_unlock(&nfsd_mutex);
+ /* Wait for shutdown of nfsd_serv to complete */
+ wait_for_completion(&nn->nfsd_shutdown_complete);
+}
+
bool i_am_nfsd(void)
{
return kthread_func(current) == nfsd;
@@ -622,11 +653,13 @@
&nfsd_thread_sv_ops);
if (nn->nfsd_serv == NULL)
return -ENOMEM;
+ init_completion(&nn->nfsd_shutdown_complete);
nn->nfsd_serv->sv_maxconn = nn->max_connections;
error = svc_bind(nn->nfsd_serv, net);
if (error < 0) {
svc_destroy(nn->nfsd_serv);
+ nfsd_complete_shutdown(net);
return error;
}
@@ -675,7 +708,7 @@
svc_shutdown_net(nn->nfsd_serv, net);
svc_destroy(nn->nfsd_serv);
if (destroy)
- nn->nfsd_serv = NULL;
+ nfsd_complete_shutdown(net);
}
int nfsd_set_nrthreads(int n, int *nthreads, struct net *net)
--
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