When a user TGT ticket expired, gssd returns EKEYEXPIRED to the RPC layer for the upcall to create the security context. The RPC layer then retries the upcall twice before returning the EKEYEXPIRED to the NFS layer. This results in three separate TCP connections to the NFS server being created by gssd for each RPC request. These connections are not used and left in TIME_WAIT state. Note that for RPC call that uses machine credential, gssd automatically renews the ticket. But for a regular user the ticket needs to be renewed by the user before access to the krb5 share is allowed. This patch removes the retries by RPC on EKEYEXPIRED so that these unused TCP connections are not created. Reproducer: $ kinit -l 1m $ sleep 65 $ cd /mnt/krb5share $ netstat -na |grep TIME_WAIT Signed-off-by: Dai Ngo <dai.ngo@xxxxxxxxxx> --- net/sunrpc/clnt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 0090162ee8c3..cd5c84a07005 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -1854,13 +1854,13 @@ call_refreshresult(struct rpc_task *task) fallthrough; case -EAGAIN: status = -EACCES; - fallthrough; - case -EKEYEXPIRED: if (!task->tk_cred_retry) break; task->tk_cred_retry--; trace_rpc_retry_refresh_status(task); return; + case -EKEYEXPIRED: + break; case -ENOMEM: rpc_delay(task, HZ >> 4); return; -- 2.43.5
