Patch generates warnings if exit_net hook detects that
structures initialized in init_net hook are still in use.
[ 9313.047796] NFSD: starting 90-second grace period (net ffff880e307fe240)
[ 9317.257203] nfsd: last server has exited, flushing export cache
[ 9320.059256] net ffff880e307fe240 exit: lockd_manager.list is not empty
[ 9320.060434] WARNING: CPU: 5 PID: 1556 at fs/lockd/svc.c:682 lockd_exit_net+0x5c/0x90 [lockd]
...
[ 9320.077346] net ffff880e307fe240 exit: grace_period_end was not canceled
[ 9320.078494] WARNING: CPU: 5 PID: 1556 at fs/lockd/svc.c:686 lockd_exit_net+0x88/0x90 [lockd]
v2: net pointer was added to output
Signed-off-by: Vasily Averin <[email protected]>
---
fs/lockd/svc.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 809cbcc..2f28850 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -690,6 +690,14 @@ static int lockd_init_net(struct net *net)
static void lockd_exit_net(struct net *net)
{
+ struct lockd_net *ln = net_generic(net, lockd_net_id);
+
+ WARN(!list_empty(&ln->lockd_manager.list),
+ "net %p exit: lockd_manager.list is not empty\n", net);
+ WARN(!list_empty(&ln->nsm_handles),
+ "net %p exit: nsm_handles list is not empty\n", net);
+ WARN(delayed_work_pending(&ln->grace_period_end),
+ "net %p exit: grace_period_end was not canceled\n", net);
}
static struct pernet_operations lockd_net_ops = {
--
2.7.4